2007-08-20 Mark Probst <mark.probst@gmail.com>

[mono.git] / mono / mini / mini.c

/*
 * mini.c: The new Mono code generator.
 *
 * Author:
 *   Paolo Molaro (lupus@ximian.com)
 *   Dietmar Maurer (dietmar@ximian.com)
 *
 * (C) 2002 Ximian, Inc.
 */

#include <config.h>
#include <signal.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <math.h>
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif

#ifdef PLATFORM_MACOSX
#include <mach/mach.h>
#include <mach/mach_error.h>
#include <mach/exception.h>
#include <mach/task.h>
#include <pthread.h>
#endif

#ifdef PLATFORM_WIN32
#define _WIN32_WINNT 0x0500
#endif

#ifdef HAVE_VALGRIND_MEMCHECK_H
#include <valgrind/memcheck.h>
#endif

#include <mono/metadata/assembly.h>
#include <mono/metadata/loader.h>
#include <mono/metadata/cil-coff.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/class.h>
#include <mono/metadata/object.h>
#include <mono/metadata/exception.h>
#include <mono/metadata/opcodes.h>
#include <mono/metadata/mono-endian.h>
#include <mono/metadata/tokentype.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/threads.h>
#include <mono/metadata/marshal.h>
#include <mono/metadata/socket-io.h>
#include <mono/metadata/appdomain.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/io-layer/io-layer.h>
#include "mono/metadata/profiler.h"
#include <mono/metadata/profiler-private.h>
#include <mono/metadata/mono-config.h>
#include <mono/metadata/environment.h>
#include <mono/metadata/mono-debug.h>
#include <mono/metadata/monitor.h>
#include <mono/metadata/security-manager.h>
#include <mono/metadata/threads-types.h>
#include <mono/metadata/rawbuffer.h>
#include <mono/metadata/security-core-clr.h>
#include <mono/utils/mono-math.h>
#include <mono/utils/mono-compiler.h>
#include <mono/utils/mono-counters.h>
#include <mono/utils/mono-logger.h>
#include <mono/utils/mono-mmap.h>
#include <mono/os/gc_wrapper.h>

#include "mini.h"
#include <string.h>
#include <ctype.h>
#include "inssel.h"
#include "trace.h"

#include "jit-icalls.h"

#include "aliasing.h"

#define BRANCH_COST 100
#define INLINE_LENGTH_LIMIT 20
#define INLINE_FAILURE do {\
                if ((cfg->method != method) && (method->wrapper_type == MONO_WRAPPER_NONE))\
                        goto inline_failure;\
        } while (0)
#define CHECK_CFG_EXCEPTION do {\
                if (cfg->exception_type != MONO_EXCEPTION_NONE)\
                        goto exception_exit;\
        } while (0)

/* 
 * this is used to determine when some branch optimizations are possible: we exclude FP compares
 * because they have weird semantics with NaNs.
 */
#define MONO_IS_COND_BRANCH_OP(ins) (((ins)->opcode >= CEE_BEQ && (ins)->opcode <= CEE_BLT_UN) || ((ins)->opcode >= OP_LBEQ && (ins)->opcode <= OP_LBLT_UN) || ((ins)->opcode >= OP_FBEQ && (ins)->opcode <= OP_FBLT_UN) || ((ins)->opcode >= OP_IBEQ && (ins)->opcode <= OP_IBLT_UN))
#define MONO_IS_COND_BRANCH_NOFP(ins) (MONO_IS_COND_BRANCH_OP(ins) && (ins)->inst_left->inst_left->type != STACK_R8)

#define MONO_IS_BRANCH_OP(ins) (MONO_IS_COND_BRANCH_OP(ins) || ((ins)->opcode == OP_BR) || ((ins)->opcode == OP_BR_REG) || ((ins)->opcode == CEE_SWITCH))

#define MONO_CHECK_THIS(ins) (mono_method_signature (cfg->method)->hasthis && (ins)->ssa_op == MONO_SSA_LOAD && (ins)->inst_left->inst_c0 == 0)

static void setup_stat_profiler (void);
gboolean  mono_arch_print_tree(MonoInst *tree, int arity);
static gpointer mono_jit_compile_method_with_opt (MonoMethod *method, guint32 opt);
static gpointer mono_jit_compile_method (MonoMethod *method);
static gpointer mono_jit_find_compiled_method (MonoDomain *domain, MonoMethod *method);
static gpointer mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method);
inline static int mono_emit_jit_icall (MonoCompile *cfg, MonoBasicBlock *bblock, gconstpointer func, MonoInst **args, const guint8 *ip);

static void handle_stobj (MonoCompile *cfg, MonoBasicBlock *bblock, MonoInst *dest, MonoInst *src, 
                          const unsigned char *ip, MonoClass *klass, gboolean to_end, gboolean native, gboolean write_barrier);

static void dec_foreach (MonoInst *tree, MonoCompile *cfg);

static int mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_bblock, MonoBasicBlock *end_bblock, 
                   int locals_offset, MonoInst *return_var, GList *dont_inline, MonoInst **inline_args, 
                   guint inline_offset, gboolean is_virtual_call);

/* helper methods signature */
static MonoMethodSignature *helper_sig_class_init_trampoline = NULL;
static MonoMethodSignature *helper_sig_domain_get = NULL;

static guint32 default_opt = 0;
static gboolean default_opt_set = FALSE;

guint32 mono_jit_tls_id = -1;
MonoTraceSpec *mono_jit_trace_calls = NULL;
gboolean mono_break_on_exc = FALSE;
#ifndef DISABLE_AOT
gboolean mono_compile_aot = FALSE;
#endif

static int mini_verbose = 0;

#define mono_jit_lock() EnterCriticalSection (&jit_mutex)
#define mono_jit_unlock() LeaveCriticalSection (&jit_mutex)
static CRITICAL_SECTION jit_mutex;

static GHashTable *class_init_hash_addr = NULL;

static MonoCodeManager *global_codeman = NULL;

static GHashTable *jit_icall_name_hash = NULL;

static MonoDebugOptions debug_options;

#ifdef VALGRIND_JIT_REGISTER_MAP
static int valgrind_register = 0;
#endif

/*
 * Address of the trampoline code.  This is used by the debugger to check
 * whether a method is a trampoline.
 */
guint8* mono_trampoline_code [MONO_TRAMPOLINE_NUM];

gboolean
mono_running_on_valgrind (void)
{
#ifdef HAVE_VALGRIND_MEMCHECK_H
                if (RUNNING_ON_VALGRIND){
#ifdef VALGRIND_JIT_REGISTER_MAP
                        valgrind_register = TRUE;
#endif
                        return TRUE;
                } else
                        return FALSE;
#else
                return FALSE;
#endif
}

/*
 * mono_create_ftnptr:
 *
 *   Given a function address, create a function descriptor for it.
 * This is only needed on IA64.
 */
gpointer
mono_create_ftnptr (MonoDomain *domain, gpointer addr)
{
#ifdef __ia64__
        gpointer *desc;

        mono_domain_lock (domain);
        desc = mono_code_manager_reserve (domain->code_mp, 2 * sizeof (gpointer));
        mono_domain_unlock (domain);

        desc [0] = addr;
        desc [1] = NULL;

        return desc;
#else
        return addr;
#endif
}

typedef struct {
        void *ip;
        MonoMethod *method;
} FindTrampUserData;

static void
find_tramp (gpointer key, gpointer value, gpointer user_data)
{
        FindTrampUserData *ud = (FindTrampUserData*)user_data;

        if (value == ud->ip)
                ud->method = (MonoMethod*)key;
}

/* debug function */
G_GNUC_UNUSED static char*
get_method_from_ip (void *ip)
{
        MonoJitInfo *ji;
        char *method;
        char *res;
        MonoDomain *domain = mono_domain_get ();
        MonoDebugSourceLocation *location;
        FindTrampUserData user_data;
        
        ji = mono_jit_info_table_find (domain, ip);
        if (!ji) {
                user_data.ip = ip;
                user_data.method = NULL;
                mono_domain_lock (domain);
                g_hash_table_foreach (domain->jit_trampoline_hash, find_tramp, &user_data);
                mono_domain_unlock (domain);
                if (user_data.method) {
                        char *mname = mono_method_full_name (user_data.method, TRUE);
                        res = g_strdup_printf ("<%p - JIT trampoline for %s>", ip, mname);
                        g_free (mname);
                        return res;
                }
                else
                        return NULL;
        }
        method = mono_method_full_name (ji->method, TRUE);
        /* FIXME: unused ? */
        location = mono_debug_lookup_source_location (ji->method, (guint32)((guint8*)ip - (guint8*)ji->code_start), domain);

        res = g_strdup_printf (" %s + 0x%x (%p %p) [%p - %s]", method, (int)((char*)ip - (char*)ji->code_start), ji->code_start, (char*)ji->code_start + ji->code_size, domain, domain->friendly_name);

        mono_debug_free_source_location (location);
        g_free (method);

        return res;
}

/** 
 * mono_pmip:
 * @ip: an instruction pointer address
 *
 * This method is used from a debugger to get the name of the
 * method at address @ip.   This routine is typically invoked from
 * a debugger like this:
 *
 * (gdb) print mono_pmip ($pc)
 *
 * Returns: the name of the method at address @ip.
 */
G_GNUC_UNUSED char *
mono_pmip (void *ip)
{
        return get_method_from_ip (ip);
}

/** 
 * mono_print_method_from_ip
 * @ip: an instruction pointer address
 *
 * This method is used from a debugger to get the name of the
 * method at address @ip.
 *
 * This prints the name of the method at address @ip in the standard
 * output.  Unlike mono_pmip which returns a string, this routine
 * prints the value on the standard output. 
 */
void
mono_print_method_from_ip (void *ip)
{
        MonoJitInfo *ji;
        char *method;
        MonoDebugSourceLocation *source;
        MonoDomain *domain = mono_domain_get ();
        FindTrampUserData user_data;
        
        ji = mono_jit_info_table_find (domain, ip);
        if (!ji) {
                user_data.ip = ip;
                user_data.method = NULL;
                mono_domain_lock (domain);
                g_hash_table_foreach (domain->jit_trampoline_hash, find_tramp, &user_data);
                mono_domain_unlock (domain);
                if (user_data.method) {
                        char *mname = mono_method_full_name (user_data.method, TRUE);
                        printf ("IP %p is a JIT trampoline for %s\n", ip, mname);
                        g_free (mname);
                }
                else
                        g_print ("No method at %p\n", ip);
                return;
        }
        method = mono_method_full_name (ji->method, TRUE);
        source = mono_debug_lookup_source_location (ji->method, (guint32)((guint8*)ip - (guint8*)ji->code_start), domain);

        g_print ("IP %p at offset 0x%x of method %s (%p %p)[domain %p - %s]\n", ip, (int)((char*)ip - (char*)ji->code_start), method, ji->code_start, (char*)ji->code_start + ji->code_size, domain, domain->friendly_name);

        if (source)
                g_print ("%s:%d\n", source->source_file, source->row);

        mono_debug_free_source_location (source);
        g_free (method);
}
        
/* 
 * mono_method_same_domain:
 *
 * Determine whenever two compiled methods are in the same domain, thus
 * the address of the callee can be embedded in the caller.
 */
gboolean mono_method_same_domain (MonoJitInfo *caller, MonoJitInfo *callee)
{
        if (!caller || !callee)
                return FALSE;

        /*
         * If the call was made from domain-neutral to domain-specific 
         * code, we can't patch the call site.
         */
        if (caller->domain_neutral && !callee->domain_neutral)
                return FALSE;

        if ((caller->method->klass == mono_defaults.appdomain_class) &&
                (strstr (caller->method->name, "InvokeInDomain"))) {
                 /* The InvokeInDomain methods change the current appdomain */
                return FALSE;
        }

        return TRUE;
}

/*
 * mono_global_codeman_reserve:
 *
 *  Allocate code memory from the global code manager.
 */
void *mono_global_codeman_reserve (int size)
{
        void *ptr;

        if (!global_codeman) {
                /* This can happen during startup */
                global_codeman = mono_code_manager_new ();
                return mono_code_manager_reserve (global_codeman, size);
        }
        else {
                mono_jit_lock ();
                ptr = mono_code_manager_reserve (global_codeman, size);
                mono_jit_unlock ();
                return ptr;
        }
}

MonoJumpInfoToken *
mono_jump_info_token_new (MonoMemPool *mp, MonoImage *image, guint32 token)
{
        MonoJumpInfoToken *res = mono_mempool_alloc0 (mp, sizeof (MonoJumpInfoToken));
        res->image = image;
        res->token = token;

        return res;
}

#define MONO_INIT_VARINFO(vi,id) do { \
        (vi)->range.first_use.pos.bid = 0xffff; \
        (vi)->reg = -1; \
        (vi)->idx = (id); \
} while (0)

//#define UNVERIFIED do { G_BREAKPOINT (); goto unverified; } while (0)
#define UNVERIFIED do { if (debug_options.break_on_unverified) G_BREAKPOINT (); else goto unverified; } while (0)

/*
 * Basic blocks have two numeric identifiers:
 * dfn: Depth First Number
 * block_num: unique ID assigned at bblock creation
 */
#define NEW_BBLOCK(cfg) (mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoBasicBlock)))
#define ADD_BBLOCK(cfg,b) do {  \
                cfg->cil_offset_to_bb [(b)->cil_code - cfg->cil_start] = (b);   \
                (b)->block_num = cfg->num_bblocks++;    \
                (b)->real_offset = real_offset; \
        } while (0)

#define GET_BBLOCK(cfg,tblock,ip) do {  \
                (tblock) = cfg->cil_offset_to_bb [(ip) - cfg->cil_start]; \
                if (!(tblock)) {        \
                        if ((ip) >= end || (ip) < header->code) UNVERIFIED; \
                        (tblock) = NEW_BBLOCK (cfg);    \
                        (tblock)->cil_code = (ip);      \
                        ADD_BBLOCK (cfg, (tblock));     \
                } \
        } while (0)

#define CHECK_BBLOCK(target,ip,tblock) do {     \
                if ((target) < (ip) && !(tblock)->code) {       \
                        bb_recheck = g_list_prepend (bb_recheck, (tblock));     \
                        if (cfg->verbose_level > 2) g_print ("queued block %d for check at IL%04x from IL%04x\n", (tblock)->block_num, (int)((target) - header->code), (int)((ip) - header->code));     \
                }       \
        } while (0)

#define NEW_ICONST(cfg,dest,val) do {   \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->opcode = OP_ICONST;     \
                (dest)->inst_c0 = (val);        \
                (dest)->type = STACK_I4;        \
        } while (0)

#define NEW_PCONST(cfg,dest,val) do {   \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->opcode = OP_PCONST;     \
                (dest)->inst_p0 = (val);        \
                (dest)->type = STACK_PTR;       \
        } while (0)


#ifdef MONO_ARCH_NEED_GOT_VAR

#define NEW_PATCH_INFO(cfg,dest,el1,el2) do {   \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->opcode = OP_PATCH_INFO; \
                (dest)->inst_left = (gpointer)(el1);    \
                (dest)->inst_right = (gpointer)(el2);   \
        } while (0)

#define NEW_AOTCONST(cfg,dest,patch_type,cons) do {                     \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst)); \
                (dest)->opcode = cfg->compile_aot ? OP_GOT_ENTRY : OP_PCONST; \
                if (cfg->compile_aot) {                                 \
                        MonoInst *group, *got_var, *got_loc;            \
                        got_loc = mono_get_got_var (cfg);               \
                        NEW_TEMPLOAD ((cfg), got_var, got_loc->inst_c0); \
                        NEW_PATCH_INFO ((cfg), group, cons, patch_type); \
                        (dest)->inst_p0 = got_var;                      \
                        (dest)->inst_p1 = group;                        \
                } else {                                                \
                        (dest)->inst_p0 = (cons);                       \
                        (dest)->inst_i1 = (gpointer)(patch_type);       \
                }                                                       \
                (dest)->type = STACK_PTR;                               \
        } while (0)

#define NEW_AOTCONST_TOKEN(cfg,dest,patch_type,image,token,stack_type,stack_class) do { \
                MonoInst *group, *got_var, *got_loc;                    \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst)); \
                (dest)->opcode = OP_GOT_ENTRY;                          \
                got_loc = mono_get_got_var (cfg);                       \
                NEW_TEMPLOAD ((cfg), got_var, got_loc->inst_c0);        \
                NEW_PATCH_INFO ((cfg), group, NULL, patch_type);        \
                group->inst_p0 = mono_jump_info_token_new ((cfg)->mempool, (image), (token)); \
                (dest)->inst_p0 = got_var;                              \
                (dest)->inst_p1 = group;                                \
                (dest)->type = (stack_type);                    \
        (dest)->klass = (stack_class);          \
        } while (0)

#else

#define NEW_AOTCONST(cfg,dest,patch_type,cons) do {    \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->opcode = cfg->compile_aot ? OP_AOTCONST : OP_PCONST;    \
                (dest)->inst_p0 = (cons);       \
                (dest)->inst_i1 = (gpointer)(patch_type); \
                (dest)->type = STACK_PTR;       \
    } while (0)

#define NEW_AOTCONST_TOKEN(cfg,dest,patch_type,image,token,stack_type,stack_class) do { \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->opcode = OP_AOTCONST;   \
                (dest)->inst_p0 = mono_jump_info_token_new ((cfg)->mempool, (image), (token));  \
                (dest)->inst_p1 = (gpointer)(patch_type); \
                (dest)->type = (stack_type);    \
        (dest)->klass = (stack_class);          \
    } while (0)

#endif

#define NEW_CLASSCONST(cfg,dest,val) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_CLASS, (val))

#define NEW_IMAGECONST(cfg,dest,val) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_IMAGE, (val))

#define NEW_FIELDCONST(cfg,dest,val) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_FIELD, (val))

#define NEW_METHODCONST(cfg,dest,val) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_METHODCONST, (val))

#define NEW_VTABLECONST(cfg,dest,vtable) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_VTABLE, cfg->compile_aot ? (gpointer)((vtable)->klass) : (vtable))

#define NEW_SFLDACONST(cfg,dest,val) NEW_AOTCONST ((cfg), (dest), MONO_PATCH_INFO_SFLDA, (val))

#define NEW_LDSTRCONST(cfg,dest,image,token) NEW_AOTCONST_TOKEN ((cfg), (dest), MONO_PATCH_INFO_LDSTR, (image), (token), STACK_OBJ, mono_defaults.string_class)

#define NEW_TYPE_FROM_HANDLE_CONST(cfg,dest,image,token) NEW_AOTCONST_TOKEN ((cfg), (dest), MONO_PATCH_INFO_TYPE_FROM_HANDLE, (image), (token), STACK_OBJ, mono_defaults.monotype_class)

#define NEW_LDTOKENCONST(cfg,dest,image,token) NEW_AOTCONST_TOKEN ((cfg), (dest), MONO_PATCH_INFO_LDTOKEN, (image), (token), STACK_PTR, NULL)

#define NEW_DECLSECCONST(cfg,dest,image,entry) do { \
                if (cfg->compile_aot) { \
                        NEW_AOTCONST_TOKEN (cfg, dest, MONO_PATCH_INFO_DECLSEC, image, (entry).index, STACK_OBJ, NULL); \
                } else { \
                        NEW_PCONST (cfg, args [0], (entry).blob); \
                } \
        } while (0)

#define NEW_DOMAINCONST(cfg,dest) do { \
                if (cfg->opt & MONO_OPT_SHARED) { \
                        /* avoid depending on undefined C behavior in sequence points */ \
                        MonoInst* __domain_var = mono_get_domainvar (cfg); \
                        NEW_TEMPLOAD (cfg, dest, __domain_var->inst_c0); \
                } else { \
                        NEW_PCONST (cfg, dest, (cfg)->domain); \
                } \
        } while (0)

#define GET_VARINFO_INST(cfg,num) ((cfg)->varinfo [(num)]->inst)

#define NEW_ARGLOAD(cfg,dest,num) do {  \
                if (arg_array [(num)]->opcode == OP_ICONST) (dest) = arg_array [(num)]; else { \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->ssa_op = MONO_SSA_LOAD; \
                (dest)->inst_i0 = arg_array [(num)];    \
                (dest)->opcode = mono_type_to_ldind ((dest)->inst_i0->inst_vtype);      \
                type_to_eval_stack_type (param_types [(num)], (dest));  \
                (dest)->klass = (dest)->inst_i0->klass; \
        }} while (0)

#define NEW_LOCLOAD(cfg,dest,num) do {  \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->ssa_op = MONO_SSA_LOAD; \
                (dest)->inst_i0 = (cfg)->varinfo [locals_offset + (num)];       \
                (dest)->opcode = mono_type_to_ldind ((dest)->inst_i0->inst_vtype);      \
                type_to_eval_stack_type (header->locals [(num)], (dest));       \
                (dest)->klass = (dest)->inst_i0->klass; \
        } while (0)

#define NEW_LOCLOADA(cfg,dest,num) do { \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->ssa_op = MONO_SSA_ADDRESS_TAKEN;        \
                (dest)->inst_i0 = (cfg)->varinfo [locals_offset + (num)];       \
                (dest)->inst_i0->flags |= MONO_INST_INDIRECT;   \
                (dest)->opcode = OP_LDADDR;     \
                (dest)->type = STACK_MP;        \
                (dest)->klass = (dest)->inst_i0->klass; \
        if (!MONO_TYPE_ISSTRUCT (header->locals [(num)])) \
           (cfg)->disable_ssa = TRUE; \
        } while (0)

#define NEW_RETLOADA(cfg,dest) do {     \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->ssa_op = MONO_SSA_ADDRESS_TAKEN;        \
                (dest)->inst_i0 = (cfg)->ret;   \
                (dest)->inst_i0->flags |= MONO_INST_INDIRECT;   \
                (dest)->opcode = cfg->ret_var_is_local ? OP_LDADDR : CEE_LDIND_I;       \
                (dest)->type = STACK_MP;        \
                (dest)->klass = (dest)->inst_i0->klass; \
                (cfg)->disable_ssa = TRUE; \
        } while (0)

#define NEW_ARGLOADA(cfg,dest,num) do { \
                if (arg_array [(num)]->opcode == OP_ICONST) goto inline_failure; \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->ssa_op = MONO_SSA_ADDRESS_TAKEN;        \
                (dest)->inst_i0 = arg_array [(num)];    \
                (dest)->inst_i0->flags |= MONO_INST_INDIRECT;   \
                (dest)->opcode = OP_LDADDR;     \
                (dest)->type = STACK_MP;        \
                (dest)->klass = (dest)->inst_i0->klass; \
                (cfg)->disable_ssa = TRUE; \
        } while (0)

#define NEW_TEMPLOAD(cfg,dest,num) do { \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->ssa_op = MONO_SSA_LOAD; \
                (dest)->inst_i0 = (cfg)->varinfo [(num)];       \
                (dest)->opcode = mono_type_to_ldind ((dest)->inst_i0->inst_vtype);      \
                type_to_eval_stack_type ((dest)->inst_i0->inst_vtype, (dest));  \
                (dest)->klass = (dest)->inst_i0->klass; \
        } while (0)

#define NEW_TEMPLOADA(cfg,dest,num) do {        \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->ssa_op = MONO_SSA_ADDRESS_TAKEN;        \
                (dest)->inst_i0 = (cfg)->varinfo [(num)];       \
                (dest)->inst_i0->flags |= MONO_INST_INDIRECT;   \
                (dest)->opcode = OP_LDADDR;     \
                (dest)->type = STACK_MP;        \
                (dest)->klass = (dest)->inst_i0->klass; \
        if (!MONO_TYPE_ISSTRUCT (cfg->varinfo [(num)]->inst_vtype)) \
           (cfg)->disable_ssa = TRUE; \
        } while (0)


#define NEW_INDLOAD(cfg,dest,addr,vtype) do {   \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->inst_left = addr;       \
                (dest)->opcode = mono_type_to_ldind (vtype);    \
                type_to_eval_stack_type (vtype, (dest));        \
                /* FIXME: (dest)->klass = (dest)->inst_i0->klass;*/     \
        } while (0)

#define NEW_INDSTORE(cfg,dest,addr,value,vtype) do {    \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->inst_i0 = addr; \
                (dest)->opcode = mono_type_to_stind (vtype);    \
                (dest)->inst_i1 = (value);      \
                /* FIXME: (dest)->klass = (dest)->inst_i0->klass;*/     \
        } while (0)

#define NEW_TEMPSTORE(cfg,dest,num,inst) do {   \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->ssa_op = MONO_SSA_STORE;        \
                (dest)->inst_i0 = (cfg)->varinfo [(num)];       \
                (dest)->opcode = mono_type_to_stind ((dest)->inst_i0->inst_vtype);      \
                (dest)->inst_i1 = (inst);       \
                (dest)->klass = (dest)->inst_i0->klass; \
        } while (0)

#define NEW_LOCSTORE(cfg,dest,num,inst) do {    \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->opcode = mono_type_to_stind (header->locals [(num)]);   \
                (dest)->ssa_op = MONO_SSA_STORE;        \
                (dest)->inst_i0 = (cfg)->varinfo [locals_offset + (num)];       \
                (dest)->inst_i1 = (inst);       \
                (dest)->klass = (dest)->inst_i0->klass; \
        } while (0)

#define NEW_ARGSTORE(cfg,dest,num,inst) do {    \
                if (arg_array [(num)]->opcode == OP_ICONST) goto inline_failure; \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->opcode = mono_type_to_stind (param_types [(num)]);      \
                (dest)->ssa_op = MONO_SSA_STORE;        \
                (dest)->inst_i0 = arg_array [(num)];    \
                (dest)->inst_i1 = (inst);       \
                (dest)->klass = (dest)->inst_i0->klass; \
        } while (0)

#define NEW_DUMMY_USE(cfg,dest,load) do { \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->opcode = OP_DUMMY_USE; \
                (dest)->inst_left = (load); \
    } while (0)

#define NEW_DUMMY_STORE(cfg,dest,num) do { \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->inst_i0 = (cfg)->varinfo [(num)];       \
                (dest)->opcode = OP_DUMMY_STORE; \
                (dest)->klass = (dest)->inst_i0->klass; \
        } while (0)

#define ADD_BINOP(op) do {      \
                MONO_INST_NEW (cfg, ins, (op)); \
                ins->cil_code = ip;     \
                sp -= 2;        \
                ins->inst_i0 = sp [0];  \
                ins->inst_i1 = sp [1];  \
                *sp++ = ins;    \
                type_from_op (ins);     \
                CHECK_TYPE (ins);       \
        } while (0)

#define ADD_UNOP(op) do {       \
                MONO_INST_NEW (cfg, ins, (op)); \
                ins->cil_code = ip;     \
                sp--;   \
                ins->inst_i0 = sp [0];  \
                *sp++ = ins;    \
                type_from_op (ins);     \
                CHECK_TYPE (ins);       \
        } while (0)

#define ADD_BINCOND(next_block) do {    \
                MonoInst *cmp;  \
                sp -= 2;                \
                MONO_INST_NEW(cfg, cmp, OP_COMPARE);    \
                cmp->inst_i0 = sp [0];  \
                cmp->inst_i1 = sp [1];  \
                cmp->cil_code = ins->cil_code;  \
                type_from_op (cmp);     \
                CHECK_TYPE (cmp);       \
                ins->inst_i0 = cmp;     \
                MONO_ADD_INS (bblock, ins);     \
                ins->inst_many_bb = mono_mempool_alloc (cfg->mempool, sizeof(gpointer)*2);      \
                GET_BBLOCK (cfg, tblock, target);               \
                link_bblock (cfg, bblock, tblock);      \
                ins->inst_true_bb = tblock;     \
                CHECK_BBLOCK (target, ip, tblock);      \
                if ((next_block)) {     \
                        link_bblock (cfg, bblock, (next_block));        \
                        ins->inst_false_bb = (next_block);      \
                        start_new_bblock = 1;   \
                } else {        \
                        GET_BBLOCK (cfg, tblock, ip);           \
                        link_bblock (cfg, bblock, tblock);      \
                        ins->inst_false_bb = tblock;    \
                        start_new_bblock = 2;   \
                }       \
        } while (0)

/* FIXME: handle float, long ... */
#define ADD_UNCOND(istrue) do { \
                MonoInst *cmp;  \
                sp--;           \
                MONO_INST_NEW(cfg, cmp, OP_COMPARE);    \
                cmp->inst_i0 = sp [0];  \
                switch (cmp->inst_i0->type) { \
                case STACK_I8: \
                        cmp->inst_i1 = zero_int64; break; \
                case STACK_R8: \
                        cmp->inst_i1 = zero_r8; break; \
                case STACK_PTR: \
                case STACK_MP: \
                        cmp->inst_i1 = zero_ptr; break; \
                case STACK_OBJ: \
                        cmp->inst_i1 = zero_obj; break; \
                default: \
                        cmp->inst_i1 = zero_int32;  \
                }  \
                cmp->cil_code = ins->cil_code;  \
                type_from_op (cmp);     \
                CHECK_TYPE (cmp);       \
                ins->inst_i0 = cmp;     \
                ins->opcode = (istrue)? CEE_BNE_UN: CEE_BEQ;    \
                MONO_ADD_INS (bblock, ins);     \
                ins->inst_many_bb = mono_mempool_alloc (cfg->mempool, sizeof(gpointer)*2);      \
                GET_BBLOCK (cfg, tblock, target);               \
                link_bblock (cfg, bblock, tblock);      \
                ins->inst_true_bb = tblock;     \
                CHECK_BBLOCK (target, ip, tblock);      \
                GET_BBLOCK (cfg, tblock, ip);           \
                link_bblock (cfg, bblock, tblock);      \
                ins->inst_false_bb = tblock;    \
                start_new_bblock = 2;   \
        } while (0)

#define NEW_LDELEMA(cfg,dest,sp,k) do { \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->opcode = CEE_LDELEMA;   \
                (dest)->inst_left = (sp) [0];   \
                (dest)->inst_right = (sp) [1];  \
                (dest)->type = STACK_MP;        \
                (dest)->klass = (k);    \
                (cfg)->flags |= MONO_CFG_HAS_LDELEMA; \
        } while (0)

#define NEW_GROUP(cfg,dest,el1,el2) do {        \
                (dest) = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoInst));       \
                (dest)->opcode = OP_GROUP;      \
                (dest)->inst_left = (el1);      \
                (dest)->inst_right = (el2);     \
        } while (0)

#if 0
static gint
compare_bblock (gconstpointer a, gconstpointer b)
{
        const MonoBasicBlock *b1 = a;
        const MonoBasicBlock *b2 = b;

        return b2->cil_code - b1->cil_code;
}
#endif

/* *
 * link_bblock: Links two basic blocks
 *
 * links two basic blocks in the control flow graph, the 'from'
 * argument is the starting block and the 'to' argument is the block
 * the control flow ends to after 'from'.
 */
static void
link_bblock (MonoCompile *cfg, MonoBasicBlock *from, MonoBasicBlock* to)
{
        MonoBasicBlock **newa;
        int i, found;

#if 0
        if (from->cil_code) {
                if (to->cil_code)
                        g_print ("edge from IL%04x to IL_%04x\n", from->cil_code - cfg->cil_code, to->cil_code - cfg->cil_code);
                else
                        g_print ("edge from IL%04x to exit\n", from->cil_code - cfg->cil_code);
        } else {
                if (to->cil_code)
                        g_print ("edge from entry to IL_%04x\n", to->cil_code - cfg->cil_code);
                else
                        g_print ("edge from entry to exit\n");
        }
#endif
        found = FALSE;
        for (i = 0; i < from->out_count; ++i) {
                if (to == from->out_bb [i]) {
                        found = TRUE;
                        break;
                }
        }
        if (!found) {
                newa = mono_mempool_alloc (cfg->mempool, sizeof (gpointer) * (from->out_count + 1));
                for (i = 0; i < from->out_count; ++i) {
                        newa [i] = from->out_bb [i];
                }
                newa [i] = to;
                from->out_count++;
                from->out_bb = newa;
        }

        found = FALSE;
        for (i = 0; i < to->in_count; ++i) {
                if (from == to->in_bb [i]) {
                        found = TRUE;
                        break;
                }
        }
        if (!found) {
                newa = mono_mempool_alloc (cfg->mempool, sizeof (gpointer) * (to->in_count + 1));
                for (i = 0; i < to->in_count; ++i) {
                        newa [i] = to->in_bb [i];
                }
                newa [i] = from;
                to->in_count++;
                to->in_bb = newa;
        }
}

/**
 * mono_unlink_bblock:
 *
 *   Unlink two basic blocks.
 */
static void
mono_unlink_bblock (MonoCompile *cfg, MonoBasicBlock *from, MonoBasicBlock* to)
{
        int i, pos;
        gboolean found;

        found = FALSE;
        for (i = 0; i < from->out_count; ++i) {
                if (to == from->out_bb [i]) {
                        found = TRUE;
                        break;
                }
        }
        if (found) {
                pos = 0;
                for (i = 0; i < from->out_count; ++i) {
                        if (from->out_bb [i] != to)
                                from->out_bb [pos ++] = from->out_bb [i];
                }
                g_assert (pos == from->out_count - 1);
                from->out_count--;
        }

        found = FALSE;
        for (i = 0; i < to->in_count; ++i) {
                if (from == to->in_bb [i]) {
                        found = TRUE;
                        break;
                }
        }
        if (found) {
                pos = 0;
                for (i = 0; i < to->in_count; ++i) {
                        if (to->in_bb [i] != from)
                                to->in_bb [pos ++] = to->in_bb [i];
                }
                g_assert (pos == to->in_count - 1);
                to->in_count--;
        }
}

/**
 * mono_find_block_region:
 *
 *   We mark each basic block with a region ID. We use that to avoid BB
 *   optimizations when blocks are in different regions.
 *
 * Returns:
 *   A region token that encodes where this region is, and information
 *   about the clause owner for this block.
 *
 *   The region encodes the try/catch/filter clause that owns this block
 *   as well as the type.  -1 is a special value that represents a block
 *   that is in none of try/catch/filter.
 */
static int
mono_find_block_region (MonoCompile *cfg, int offset)
{
        MonoMethod *method = cfg->method;
        MonoMethodHeader *header = mono_method_get_header (method);
        MonoExceptionClause *clause;
        int i;

        /* first search for handlers and filters */
        for (i = 0; i < header->num_clauses; ++i) {
                clause = &header->clauses [i];
                if ((clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) && (offset >= clause->data.filter_offset) &&
                    (offset < (clause->handler_offset)))
                        return ((i + 1) << 8) | MONO_REGION_FILTER | clause->flags;
                           
                if (MONO_OFFSET_IN_HANDLER (clause, offset)) {
                        if (clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY)
                                return ((i + 1) << 8) | MONO_REGION_FINALLY | clause->flags;
                        else if (clause->flags == MONO_EXCEPTION_CLAUSE_FAULT)
                                return ((i + 1) << 8) | MONO_REGION_FAULT | clause->flags;
                        else if (clause->flags == MONO_EXCEPTION_CLAUSE_NONE)
                                return ((i + 1) << 8) | MONO_REGION_CATCH | clause->flags;
                }
        }

        /* search the try blocks */
        for (i = 0; i < header->num_clauses; ++i) {
                clause = &header->clauses [i];
                if (MONO_OFFSET_IN_CLAUSE (clause, offset))
                        return ((i + 1) << 8) | clause->flags;
        }

        return -1;
}

static GList*
mono_find_final_block (MonoCompile *cfg, unsigned char *ip, unsigned char *target, int type)
{
        MonoMethod *method = cfg->method;
        MonoMethodHeader *header = mono_method_get_header (method);
        MonoExceptionClause *clause;
        MonoBasicBlock *handler;
        int i;
        GList *res = NULL;

        for (i = 0; i < header->num_clauses; ++i) {
                clause = &header->clauses [i];
                if (MONO_OFFSET_IN_CLAUSE (clause, (ip - header->code)) && 
                    (!MONO_OFFSET_IN_CLAUSE (clause, (target - header->code)))) {
                        if (clause->flags == type) {
                                handler = cfg->cil_offset_to_bb [clause->handler_offset];
                                g_assert (handler);
                                res = g_list_append (res, handler);
                        }
                }
        }
        return res;
}

MonoInst *
mono_find_spvar_for_region (MonoCompile *cfg, int region)
{
        return g_hash_table_lookup (cfg->spvars, GINT_TO_POINTER (region));
}

static void
mono_create_spvar_for_region (MonoCompile *cfg, int region)
{
        MonoInst *var;

        var = g_hash_table_lookup (cfg->spvars, GINT_TO_POINTER (region));
        if (var)
                return;

        var = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_LOCAL);
        /* prevent it from being register allocated */
        var->flags |= MONO_INST_INDIRECT;

        g_hash_table_insert (cfg->spvars, GINT_TO_POINTER (region), var);
}

static MonoInst *
mono_find_exvar_for_offset (MonoCompile *cfg, int offset)
{
        return g_hash_table_lookup (cfg->exvars, GINT_TO_POINTER (offset));
}

static MonoInst*
mono_create_exvar_for_offset (MonoCompile *cfg, int offset)
{
        MonoInst *var;

        var = g_hash_table_lookup (cfg->exvars, GINT_TO_POINTER (offset));
        if (var)
                return var;

        var = mono_compile_create_var (cfg, &mono_defaults.object_class->byval_arg, OP_LOCAL);
        /* prevent it from being register allocated */
        var->flags |= MONO_INST_INDIRECT;

        g_hash_table_insert (cfg->exvars, GINT_TO_POINTER (offset), var);

        return var;
}

static void
df_visit (MonoBasicBlock *start, int *dfn, MonoBasicBlock **array)
{
        int i;

        array [*dfn] = start;
        /*g_print ("visit %d at %p (BB%ld)\n", *dfn, start->cil_code, start->block_num);*/
        for (i = 0; i < start->out_count; ++i) {
                if (start->out_bb [i]->dfn)
                        continue;
                (*dfn)++;
                start->out_bb [i]->dfn = *dfn;
                start->out_bb [i]->df_parent = start;
                array [*dfn] = start->out_bb [i];
                df_visit (start->out_bb [i], dfn, array);
        }
}

static MonoBasicBlock*
find_previous (MonoBasicBlock **bblocks, guint32 n_bblocks, MonoBasicBlock *start, const guchar *code)
{
        MonoBasicBlock *best = start;
        int i;

        for (i = 0; i < n_bblocks; ++i) {
                if (bblocks [i]) {
                        MonoBasicBlock *bb = bblocks [i];

                        if (bb->cil_code && bb->cil_code < code && bb->cil_code > best->cil_code)
                                best = bb;
                }
        }

        return best;
}

static void
split_bblock (MonoCompile *cfg, MonoBasicBlock *first, MonoBasicBlock *second) {
        int i, j;
        MonoInst *inst;
        MonoBasicBlock *bb;

        if (second->code)
                return;
        
        /* 
         * FIXME: take into account all the details:
         * second may have been the target of more than one bblock
         */
        second->out_count = first->out_count;
        second->out_bb = first->out_bb;

        for (i = 0; i < first->out_count; ++i) {
                bb = first->out_bb [i];
                for (j = 0; j < bb->in_count; ++j) {
                        if (bb->in_bb [j] == first)
                                bb->in_bb [j] = second;
                }
        }

        first->out_count = 0;
        first->out_bb = NULL;
        link_bblock (cfg, first, second);

        second->last_ins = first->last_ins;

        /*g_print ("start search at %p for %p\n", first->cil_code, second->cil_code);*/
        for (inst = first->code; inst && inst->next; inst = inst->next) {
                /*char *code = mono_disasm_code_one (NULL, cfg->method, inst->next->cil_code, NULL);
                g_print ("found %p: %s", inst->next->cil_code, code);
                g_free (code);*/
                if (inst->cil_code < second->cil_code && inst->next->cil_code >= second->cil_code) {
                        second->code = inst->next;
                        inst->next = NULL;
                        first->last_ins = inst;
                        second->next_bb = first->next_bb;
                        first->next_bb = second;
                        return;
                }
        }
        if (!second->code) {
                g_warning ("bblock split failed in %s::%s\n", cfg->method->klass->name, cfg->method->name);
                //G_BREAKPOINT ();
        }
}

static guint32
reverse_branch_op (guint32 opcode)
{
        static const int reverse_map [] = {
                CEE_BNE_UN, CEE_BLT, CEE_BLE, CEE_BGT, CEE_BGE,
                CEE_BEQ, CEE_BLT_UN, CEE_BLE_UN, CEE_BGT_UN, CEE_BGE_UN
        };
        static const int reverse_fmap [] = {
                OP_FBNE_UN, OP_FBLT, OP_FBLE, OP_FBGT, OP_FBGE,
                OP_FBEQ, OP_FBLT_UN, OP_FBLE_UN, OP_FBGT_UN, OP_FBGE_UN
        };
        static const int reverse_lmap [] = {
                OP_LBNE_UN, OP_LBLT, OP_LBLE, OP_LBGT, OP_LBGE,
                OP_LBEQ, OP_LBLT_UN, OP_LBLE_UN, OP_LBGT_UN, OP_LBGE_UN
        };
        static const int reverse_imap [] = {
                OP_IBNE_UN, OP_IBLT, OP_IBLE, OP_IBGT, OP_IBGE,
                OP_IBEQ, OP_IBLT_UN, OP_IBLE_UN, OP_IBGT_UN, OP_IBGE_UN
        };
                                
        if (opcode >= CEE_BEQ && opcode <= CEE_BLT_UN) {
                opcode = reverse_map [opcode - CEE_BEQ];
        } else if (opcode >= OP_FBEQ && opcode <= OP_FBLT_UN) {
                opcode = reverse_fmap [opcode - OP_FBEQ];
        } else if (opcode >= OP_LBEQ && opcode <= OP_LBLT_UN) {
                opcode = reverse_lmap [opcode - OP_LBEQ];
        } else if (opcode >= OP_IBEQ && opcode <= OP_IBLT_UN) {
                opcode = reverse_imap [opcode - OP_IBEQ];
        } else
                g_assert_not_reached ();

        return opcode;
}

#ifdef MONO_ARCH_SOFT_FLOAT
static int
condbr_to_fp_br (int opcode)
{
        switch (opcode) {
        case CEE_BEQ: return OP_FBEQ;
        case CEE_BGE: return OP_FBGE;
        case CEE_BGT: return OP_FBGT;
        case CEE_BLE: return OP_FBLE;
        case CEE_BLT: return OP_FBLT;
        case CEE_BNE_UN: return OP_FBNE_UN;
        case CEE_BGE_UN: return OP_FBGE_UN;
        case CEE_BGT_UN: return OP_FBGT_UN;
        case CEE_BLE_UN: return OP_FBLE_UN;
        case CEE_BLT_UN: return OP_FBLT_UN;
        }
        g_assert_not_reached ();
        return 0;
}
#endif

/*
 * Returns the type used in the eval stack when @type is loaded.
 * FIXME: return a MonoType/MonoClass for the byref and VALUETYPE cases.
 */
static void
type_to_eval_stack_type (MonoType *type, MonoInst *inst)
{
        MonoClass *klass;

        inst->klass = klass = mono_class_from_mono_type (type);
        if (type->byref) {
                inst->type = STACK_MP;
                return;
        }

handle_enum:
        switch (type->type) {
        case MONO_TYPE_VOID:
                inst->type = STACK_INV;
                return;
        case MONO_TYPE_I1:
        case MONO_TYPE_U1:
        case MONO_TYPE_BOOLEAN:
        case MONO_TYPE_I2:
        case MONO_TYPE_U2:
        case MONO_TYPE_CHAR:
        case MONO_TYPE_I4:
        case MONO_TYPE_U4:
                inst->type = STACK_I4;
                return;
        case MONO_TYPE_I:
        case MONO_TYPE_U:
        case MONO_TYPE_PTR:
        case MONO_TYPE_FNPTR:
                inst->type = STACK_PTR;
                return;
        case MONO_TYPE_CLASS:
        case MONO_TYPE_STRING:
        case MONO_TYPE_OBJECT:
        case MONO_TYPE_SZARRAY:
        case MONO_TYPE_ARRAY:    
                inst->type = STACK_OBJ;
                return;
        case MONO_TYPE_I8:
        case MONO_TYPE_U8:
                inst->type = STACK_I8;
                return;
        case MONO_TYPE_R4:
        case MONO_TYPE_R8:
                inst->type = STACK_R8;
                return;
        case MONO_TYPE_VALUETYPE:
                if (type->data.klass->enumtype) {
                        type = type->data.klass->enum_basetype;
                        goto handle_enum;
                } else {
                        inst->klass = klass;
                        inst->type = STACK_VTYPE;
                        return;
                }
        case MONO_TYPE_TYPEDBYREF:
                inst->klass = mono_defaults.typed_reference_class;
                inst->type = STACK_VTYPE;
                return;
        case MONO_TYPE_GENERICINST:
                type = &type->data.generic_class->container_class->byval_arg;
                goto handle_enum;
        default:
                g_error ("unknown type 0x%02x in eval stack type", type->type);
        }
}

/*
 * The following tables are used to quickly validate the IL code in type_from_op ().
 */
static const char
bin_num_table [STACK_MAX] [STACK_MAX] = {
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_I4,  STACK_INV, STACK_PTR, STACK_INV, STACK_MP,  STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_I8,  STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_PTR, STACK_INV, STACK_PTR, STACK_INV, STACK_MP,  STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_R8,  STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_MP,  STACK_INV, STACK_MP,  STACK_INV, STACK_PTR, STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV}
};

static const char 
neg_table [] = {
        STACK_INV, STACK_I4, STACK_I8, STACK_PTR, STACK_R8, STACK_INV, STACK_INV, STACK_INV
};

/* reduce the size of this table */
static const char
bin_int_table [STACK_MAX] [STACK_MAX] = {
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_I4,  STACK_INV, STACK_PTR, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_I8,  STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_PTR, STACK_INV, STACK_PTR, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV}
};

static const char
bin_comp_table [STACK_MAX] [STACK_MAX] = {
/*      Inv i  L  p  F  &  O  vt */
        {0},
        {0, 1, 0, 1, 0, 0, 0, 0}, /* i, int32 */
        {0, 0, 1, 0, 0, 0, 0, 0}, /* L, int64 */
        {0, 1, 0, 1, 0, 2, 4, 0}, /* p, ptr */
        {0, 0, 0, 0, 1, 0, 0, 0}, /* F, R8 */
        {0, 0, 0, 2, 0, 1, 0, 0}, /* &, managed pointer */
        {0, 0, 0, 4, 0, 0, 3, 0}, /* O, reference */
        {0, 0, 0, 0, 0, 0, 0, 0}, /* vt value type */
};

/* reduce the size of this table */
static const char
shift_table [STACK_MAX] [STACK_MAX] = {
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_I4,  STACK_INV, STACK_I4,  STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_I8,  STACK_INV, STACK_I8,  STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_PTR, STACK_INV, STACK_PTR, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV},
        {STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV, STACK_INV}
};

/*
 * Tables to map from the non-specific opcode to the matching
 * type-specific opcode.
 */
/* handles from CEE_ADD to CEE_SHR_UN (CEE_REM_UN for floats) */
static const guint16
binops_op_map [STACK_MAX] = {
        0, 0, OP_LADD-CEE_ADD, OP_PADD-CEE_ADD, OP_FADD-CEE_ADD, OP_PADD-CEE_ADD
};

/* handles from CEE_NEG to CEE_CONV_U8 */
static const guint16
unops_op_map [STACK_MAX] = {
        0, 0, OP_LNEG-CEE_NEG, OP_PNEG-CEE_NEG, OP_FNEG-CEE_NEG, OP_PNEG-CEE_NEG
};

/* handles from CEE_CONV_U2 to CEE_SUB_OVF_UN */
static const guint16
ovfops_op_map [STACK_MAX] = {
        0, 0, OP_LCONV_TO_U2-CEE_CONV_U2, OP_PCONV_TO_U2-CEE_CONV_U2, OP_FCONV_TO_U2-CEE_CONV_U2, OP_PCONV_TO_U2-CEE_CONV_U2, OP_PCONV_TO_U2-CEE_CONV_U2
};

/* handles from CEE_CONV_OVF_I1_UN to CEE_CONV_OVF_U_UN */
static const guint16
ovf2ops_op_map [STACK_MAX] = {
        0, 0, OP_LCONV_TO_OVF_I1_UN-CEE_CONV_OVF_I1_UN, OP_PCONV_TO_OVF_I1_UN-CEE_CONV_OVF_I1_UN, OP_FCONV_TO_OVF_I1_UN-CEE_CONV_OVF_I1_UN, OP_PCONV_TO_OVF_I1_UN-CEE_CONV_OVF_I1_UN
};

/* handles from CEE_CONV_OVF_I1 to CEE_CONV_OVF_U8 */
static const guint16
ovf3ops_op_map [STACK_MAX] = {
        0, 0, OP_LCONV_TO_OVF_I1-CEE_CONV_OVF_I1, OP_PCONV_TO_OVF_I1-CEE_CONV_OVF_I1, OP_FCONV_TO_OVF_I1-CEE_CONV_OVF_I1, OP_PCONV_TO_OVF_I1-CEE_CONV_OVF_I1
};

/* handles from CEE_CEQ to CEE_CLT_UN */
static const guint16
ceqops_op_map [STACK_MAX] = {
        0, 0, OP_LCEQ-OP_CEQ, OP_PCEQ-OP_CEQ, OP_FCEQ-OP_CEQ, OP_LCEQ-OP_CEQ
};

/*
 * Sets ins->type (the type on the eval stack) according to the
 * type of the opcode and the arguments to it.
 * Invalid IL code is marked by setting ins->type to the invalid value STACK_INV.
 *
 * FIXME: this function sets ins->type unconditionally in some cases, but
 * it should set it to invalid for some types (a conv.x on an object)
 */
static void
type_from_op (MonoInst *ins) {
        switch (ins->opcode) {
        /* binops */
        case CEE_ADD:
        case CEE_SUB:
        case CEE_MUL:
        case CEE_DIV:
        case CEE_REM:
                /* FIXME: check unverifiable args for STACK_MP */
                ins->type = bin_num_table [ins->inst_i0->type] [ins->inst_i1->type];
                ins->opcode += binops_op_map [ins->type];
                return;
        case CEE_DIV_UN:
        case CEE_REM_UN:
        case CEE_AND:
        case CEE_OR:
        case CEE_XOR:
                ins->type = bin_int_table [ins->inst_i0->type] [ins->inst_i1->type];
                ins->opcode += binops_op_map [ins->type];
                return;
        case CEE_SHL:
        case CEE_SHR:
        case CEE_SHR_UN:
                ins->type = shift_table [ins->inst_i0->type] [ins->inst_i1->type];
                ins->opcode += binops_op_map [ins->type];
                return;
        case OP_COMPARE:
        case OP_LCOMPARE:
                /* FIXME: handle some specifics with ins->next->type */
                ins->type = bin_comp_table [ins->inst_i0->type] [ins->inst_i1->type] ? STACK_I4: STACK_INV;
                if ((ins->inst_i0->type == STACK_I8) || ((sizeof (gpointer) == 8) && ((ins->inst_i0->type == STACK_PTR) || (ins->inst_i0->type == STACK_OBJ) || (ins->inst_i0->type == STACK_MP))))
                        ins->opcode = OP_LCOMPARE;
                return;
        case OP_CEQ:
                ins->type = bin_comp_table [ins->inst_i0->type] [ins->inst_i1->type] ? STACK_I4: STACK_INV;
                ins->opcode += ceqops_op_map [ins->inst_i0->type];
                return;
                
        case OP_CGT:
        case OP_CGT_UN:
        case OP_CLT:
        case OP_CLT_UN:
                ins->type = (bin_comp_table [ins->inst_i0->type] [ins->inst_i1->type] & 1) ? STACK_I4: STACK_INV;
                ins->opcode += ceqops_op_map [ins->inst_i0->type];
                return;
        /* unops */
        case CEE_NEG:
                ins->type = neg_table [ins->inst_i0->type];
                ins->opcode += unops_op_map [ins->type];
                return;
        case CEE_NOT:
                if (ins->inst_i0->type >= STACK_I4 && ins->inst_i0->type <= STACK_PTR)
                        ins->type = ins->inst_i0->type;
                else
                        ins->type = STACK_INV;
                ins->opcode += unops_op_map [ins->type];
                return;
        case CEE_CONV_I1:
        case CEE_CONV_I2:
        case CEE_CONV_I4:
        case CEE_CONV_U4:
                ins->type = STACK_I4;
                ins->opcode += unops_op_map [ins->inst_i0->type];
                return;
        case CEE_CONV_R_UN:
                ins->type = STACK_R8;
                switch (ins->inst_i0->type) {
                case STACK_I4:
                case STACK_PTR:
                        break;
                case STACK_I8:
                        ins->opcode = OP_LCONV_TO_R_UN; 
                        break;
                }
                return;
        case CEE_CONV_OVF_I1:
        case CEE_CONV_OVF_U1:
        case CEE_CONV_OVF_I2:
        case CEE_CONV_OVF_U2:
        case CEE_CONV_OVF_I4:
        case CEE_CONV_OVF_U4:
                ins->type = STACK_I4;
                ins->opcode += ovf3ops_op_map [ins->inst_i0->type];
                return;
        case CEE_CONV_OVF_I_UN:
        case CEE_CONV_OVF_U_UN:
                ins->type = STACK_PTR;
                ins->opcode += ovf2ops_op_map [ins->inst_i0->type];
                return;
        case CEE_CONV_OVF_I1_UN:
        case CEE_CONV_OVF_I2_UN:
        case CEE_CONV_OVF_I4_UN:
        case CEE_CONV_OVF_U1_UN:
        case CEE_CONV_OVF_U2_UN:
        case CEE_CONV_OVF_U4_UN:
                ins->type = STACK_I4;
                ins->opcode += ovf2ops_op_map [ins->inst_i0->type];
                return;
        case CEE_CONV_U:
                ins->type = STACK_PTR;
                switch (ins->inst_i0->type) {
                case STACK_I4:
                        break;
                case STACK_PTR:
                case STACK_MP:
#if SIZEOF_VOID_P == 8
                        ins->opcode = OP_LCONV_TO_U;
#endif
                        break;
                case STACK_I8:
                        ins->opcode = OP_LCONV_TO_U;
                        break;
                case STACK_R8:
                        ins->opcode = OP_FCONV_TO_U;
                        break;
                }
                return;
        case CEE_CONV_I8:
        case CEE_CONV_U8:
                ins->type = STACK_I8;
                ins->opcode += unops_op_map [ins->inst_i0->type];
                return;
        case CEE_CONV_OVF_I8:
        case CEE_CONV_OVF_U8:
                ins->type = STACK_I8;
                ins->opcode += ovf3ops_op_map [ins->inst_i0->type];
                return;
        case CEE_CONV_OVF_U8_UN:
        case CEE_CONV_OVF_I8_UN:
                ins->type = STACK_I8;
                ins->opcode += ovf2ops_op_map [ins->inst_i0->type];
                return;
        case CEE_CONV_R4:
        case CEE_CONV_R8:
                ins->type = STACK_R8;
                ins->opcode += unops_op_map [ins->inst_i0->type];
                return;
        case OP_CKFINITE:
                ins->type = STACK_R8;           
                return;
        case CEE_CONV_U2:
        case CEE_CONV_U1:
                ins->type = STACK_I4;
                ins->opcode += ovfops_op_map [ins->inst_i0->type];
                break;
        case CEE_CONV_I:
        case CEE_CONV_OVF_I:
        case CEE_CONV_OVF_U:
                ins->type = STACK_PTR;
                ins->opcode += ovfops_op_map [ins->inst_i0->type];
                return;
        case CEE_ADD_OVF:
        case CEE_ADD_OVF_UN:
        case CEE_MUL_OVF:
        case CEE_MUL_OVF_UN:
        case CEE_SUB_OVF:
        case CEE_SUB_OVF_UN:
                ins->type = bin_num_table [ins->inst_i0->type] [ins->inst_i1->type];
                ins->opcode += ovfops_op_map [ins->inst_i0->type];
                return;
        default:
                g_error ("opcode 0x%04x not handled in type from op", ins->opcode);
                break;
        }
}

static const char 
ldind_type [] = {
        STACK_I4, STACK_I4, STACK_I4, STACK_I4, STACK_I4, STACK_I4, STACK_I8, STACK_PTR, STACK_R8, STACK_R8, STACK_OBJ
};

/* map ldelem.x to the matching ldind.x opcode */
static const guchar
ldelem_to_ldind [] = {
        CEE_LDIND_I1,
        CEE_LDIND_U1,
        CEE_LDIND_I2,
        CEE_LDIND_U2,
        CEE_LDIND_I4,
        CEE_LDIND_U4,
        CEE_LDIND_I8,
        CEE_LDIND_I,
        CEE_LDIND_R4,
        CEE_LDIND_R8,
        CEE_LDIND_REF
};

/* map stelem.x to the matching stind.x opcode */
static const guchar
stelem_to_stind [] = {
        CEE_STIND_I,
        CEE_STIND_I1,
        CEE_STIND_I2,
        CEE_STIND_I4,
        CEE_STIND_I8,
        CEE_STIND_R4,
        CEE_STIND_R8,
        CEE_STIND_REF
};

#if 0

static const char
param_table [STACK_MAX] [STACK_MAX] = {
        {0},
};

static int
check_values_to_signature (MonoInst *args, MonoType *this, MonoMethodSignature *sig) {
        int i;

        if (sig->hasthis) {
                switch (args->type) {
                case STACK_I4:
                case STACK_I8:
                case STACK_R8:
                case STACK_VTYPE:
                case STACK_INV:
                        return 0;
                }
                args++;
        }
        for (i = 0; i < sig->param_count; ++i) {
                switch (args [i].type) {
                case STACK_INV:
                        return 0;
                case STACK_MP:
                        if (!sig->params [i]->byref)
                                return 0;
                        continue;
                case STACK_OBJ:
                        if (sig->params [i]->byref)
                                return 0;
                        switch (sig->params [i]->type) {
                        case MONO_TYPE_CLASS:
                        case MONO_TYPE_STRING:
                        case MONO_TYPE_OBJECT:
                        case MONO_TYPE_SZARRAY:
                        case MONO_TYPE_ARRAY:
                                break;
                        default:
                                return 0;
                        }
                        continue;
                case STACK_R8:
                        if (sig->params [i]->byref)
                                return 0;
                        if (sig->params [i]->type != MONO_TYPE_R4 && sig->params [i]->type != MONO_TYPE_R8)
                                return 0;
                        continue;
                case STACK_PTR:
                case STACK_I4:
                case STACK_I8:
                case STACK_VTYPE:
                        break;
                }
                /*if (!param_table [args [i].type] [sig->params [i]->type])
                        return 0;*/
        }
        return 1;
}
#endif

/*
 * When we need a pointer to the current domain many times in a method, we
 * call mono_domain_get() once and we store the result in a local variable.
 * This function returns the variable that represents the MonoDomain*.
 */
inline static MonoInst *
mono_get_domainvar (MonoCompile *cfg)
{
        if (!cfg->domainvar)
                cfg->domainvar = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_LOCAL);
        return cfg->domainvar;
}

/*
 * The got_var contains the address of the Global Offset Table when AOT 
 * compiling.
 */
inline static MonoInst *
mono_get_got_var (MonoCompile *cfg)
{
#ifdef MONO_ARCH_NEED_GOT_VAR
        if (!cfg->compile_aot)
                return NULL;
        if (!cfg->got_var) {
                cfg->got_var = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_LOCAL);
        }
        return cfg->got_var;
#else
        return NULL;
#endif
}

MonoInst*
mono_compile_create_var (MonoCompile *cfg, MonoType *type, int opcode)
{
        MonoInst *inst;
        int num = cfg->num_varinfo;

        if ((num + 1) >= cfg->varinfo_count) {
                cfg->varinfo_count = (cfg->varinfo_count + 2) * 2;
                cfg->varinfo = (MonoInst **)g_realloc (cfg->varinfo, sizeof (MonoInst*) * cfg->varinfo_count);
                cfg->vars = (MonoMethodVar **)g_realloc (cfg->vars, sizeof (MonoMethodVar*) * cfg->varinfo_count);      
        }

        /*g_print ("created temp %d of type 0x%x\n", num, type->type);*/
        mono_jit_stats.allocate_var++;

        MONO_INST_NEW (cfg, inst, opcode);
        inst->inst_c0 = num;
        inst->inst_vtype = type;
        inst->klass = mono_class_from_mono_type (type);
        /* if set to 1 the variable is native */
        inst->backend.is_pinvoke = 0;

        cfg->varinfo [num] = inst;

        cfg->vars [num] = mono_mempool_alloc0 (cfg->mempool, sizeof (MonoMethodVar));
        MONO_INIT_VARINFO (cfg->vars [num], num);

        cfg->num_varinfo++;
        if (cfg->verbose_level > 2)
                g_print ("created temp %d of type %s\n", num, mono_type_get_name (type));
        return inst;
}

/*
 * Transform a MonoInst into a load from the variable of index var_index.
 */
void
mono_compile_make_var_load (MonoCompile *cfg, MonoInst *dest, gssize var_index) {
        memset (dest, 0, sizeof (MonoInst));
        dest->ssa_op = MONO_SSA_LOAD;
        dest->inst_i0 = cfg->varinfo [var_index];
        dest->opcode = mono_type_to_ldind (dest->inst_i0->inst_vtype);
        type_to_eval_stack_type (dest->inst_i0->inst_vtype, dest);
        dest->klass = dest->inst_i0->klass;
}

/*
 * Create a MonoInst that is a load from the variable of index var_index.
 */
MonoInst*
mono_compile_create_var_load (MonoCompile *cfg, gssize var_index) {
        MonoInst *dest;
        NEW_TEMPLOAD (cfg,dest,var_index);
        return dest;
}

/*
 * Create a MonoInst that is a store of the given value into the variable of index var_index.
 */
MonoInst*
mono_compile_create_var_store (MonoCompile *cfg, gssize var_index, MonoInst *value) {
        MonoInst *dest;
        NEW_TEMPSTORE (cfg, dest, var_index, value);
        return dest;
}

static MonoType*
type_from_stack_type (MonoInst *ins) {
        switch (ins->type) {
        case STACK_I4: return &mono_defaults.int32_class->byval_arg;
        case STACK_I8: return &mono_defaults.int64_class->byval_arg;
        case STACK_PTR: return &mono_defaults.int_class->byval_arg;
        case STACK_R8: return &mono_defaults.double_class->byval_arg;
        case STACK_MP:
                /* 
                 * this if used to be commented without any specific reason, but
                 * it breaks #80235 when commented
                 */
                if (ins->klass)
                        return &ins->klass->this_arg;
                else
                        return &mono_defaults.object_class->this_arg;
        case STACK_OBJ:
                /* ins->klass may not be set for ldnull.
                 * Also, if we have a boxed valuetype, we want an object lass,
                 * not the valuetype class
                 */
                if (ins->klass && !ins->klass->valuetype)
                        return &ins->klass->byval_arg;
                return &mono_defaults.object_class->byval_arg;
        case STACK_VTYPE: return &ins->klass->byval_arg;
        default:
                g_error ("stack type %d to montype not handled\n", ins->type);
        }
        return NULL;
}

MonoType*
mono_type_from_stack_type (MonoInst *ins) {
        return type_from_stack_type (ins);
}

static MonoClass*
array_access_to_klass (int opcode, MonoInst *array_obj)
{
        switch (opcode) {
        case CEE_LDELEM_U1:
                return mono_defaults.byte_class;
        case CEE_LDELEM_U2:
                return mono_defaults.uint16_class;
        case CEE_LDELEM_I:
        case CEE_STELEM_I:
                return mono_defaults.int_class;
        case CEE_LDELEM_I1:
        case CEE_STELEM_I1:
                return mono_defaults.sbyte_class;
        case CEE_LDELEM_I2:
        case CEE_STELEM_I2:
                return mono_defaults.int16_class;
        case CEE_LDELEM_I4:
        case CEE_STELEM_I4:
                return mono_defaults.int32_class;
        case CEE_LDELEM_U4:
                return mono_defaults.uint32_class;
        case CEE_LDELEM_I8:
        case CEE_STELEM_I8:
                return mono_defaults.int64_class;
        case CEE_LDELEM_R4:
        case CEE_STELEM_R4:
                return mono_defaults.single_class;
        case CEE_LDELEM_R8:
        case CEE_STELEM_R8:
                return mono_defaults.double_class;
        case CEE_LDELEM_REF:
        case CEE_STELEM_REF: {
                MonoClass *klass = array_obj->klass;
                /* FIXME: add assert */
                if (klass && klass->rank)
                        return klass->element_class;
                return mono_defaults.object_class;
        }
        default:
                g_assert_not_reached ();
        }
        return NULL;
}

void
mono_add_ins_to_end (MonoBasicBlock *bb, MonoInst *inst)
{
        MonoInst *prev;
        if (!bb->code) {
                MONO_ADD_INS (bb, inst);
                return;
        }
        switch (bb->last_ins->opcode) {
        case CEE_BEQ:
        case CEE_BGE:
        case CEE_BGT:
        case CEE_BLE:
        case CEE_BLT:
        case CEE_BNE_UN:
        case CEE_BGE_UN:
        case CEE_BGT_UN:
        case CEE_BLE_UN:
        case CEE_BLT_UN:
        case OP_BR:
        case CEE_SWITCH:
                prev = bb->code;
                while (prev->next && prev->next != bb->last_ins)
                        prev = prev->next;
                if (prev == bb->code) {
                        if (bb->last_ins == bb->code) {
                                inst->next = bb->code;
                                bb->code = inst;
                        } else {
                                inst->next = prev->next;
                                prev->next = inst;
                        }
                } else {
                        inst->next = bb->last_ins;
                        prev->next = inst;
                }
                break;
        //      g_warning ("handle conditional jump in add_ins_to_end ()\n");
        default:
                MONO_ADD_INS (bb, inst);
                break;
        }
}

void
mono_add_varcopy_to_end (MonoCompile *cfg, MonoBasicBlock *bb, int src, int dest)
{
        MonoInst *inst, *load;

        NEW_TEMPLOAD (cfg, load, src);

        NEW_TEMPSTORE (cfg, inst, dest, load);
        if (inst->opcode == CEE_STOBJ) {
                NEW_TEMPLOADA (cfg, inst, dest);
                handle_stobj (cfg, bb, inst, load, NULL, inst->klass, TRUE, FALSE, FALSE);
        } else {
                inst->cil_code = NULL;
                mono_add_ins_to_end (bb, inst);
        }
}

/*
 * merge_stacks:
 *
 * Merge stack state between two basic blocks according to Ecma 335, Partition III,
 * section 1.8.1.1. Store the resulting stack state into stack_2.
 * Returns: TRUE, if verification succeeds, FALSE otherwise.
 * FIXME: We should store the stack state in a dedicated structure instead of in
 * MonoInst's.
 */
static gboolean
merge_stacks (MonoCompile *cfg, MonoStackSlot *state_1, MonoStackSlot *state_2, guint32 size)
{
        int i;

        if (cfg->dont_verify_stack_merge)
                return TRUE;

        /* FIXME: Implement all checks from the spec */

        for (i = 0; i < size; ++i) {
                MonoStackSlot *slot1 = &state_1 [i];
                MonoStackSlot *slot2 = &state_2 [i];

                if (slot1->type != slot2->type)
                        return FALSE;

                switch (slot1->type) {
                case STACK_PTR:
                        /* FIXME: Perform merge ? */
                        /* klass == NULL means a native int */
                        if (slot1->klass && slot2->klass) {
                                if (slot1->klass != slot2->klass)
                                        return FALSE;
                        }
                        break;
                case STACK_MP:
                        /* FIXME: Change this to an assert and fix the JIT to allways fill this */
                        if (slot1->klass && slot2->klass) {
                                if (slot1->klass != slot2->klass)
                                        return FALSE;
                        }
                        break;
                case STACK_OBJ: {
                        MonoClass *klass1 = slot1->klass;
                        MonoClass *klass2 = slot2->klass;

                        if (!klass1) {
                                /* slot1 is ldnull */
                        } else if (!klass2) {
                                /* slot2 is ldnull */
                                slot2->klass = slot1->klass;
                        }
                        break;
                }
                }
        }

        return TRUE;
}

/*
 * This function is called to handle items that are left on the evaluation stack
 * at basic block boundaries. What happens is that we save the values to local variables
 * and we reload them later when first entering the target basic block (with the
 * handle_loaded_temps () function).
 * It is also used to handle items on the stack in store opcodes, since it is
 * possible that the variable to be stored into is already on the stack, in
 * which case its old value should be used.
 * A single joint point will use the same variables (stored in the array bb->out_stack or
 * bb->in_stack, if the basic block is before or after the joint point).
 * If the stack merge fails at a join point, cfg->unverifiable is set.
 */
static int
handle_stack_args (MonoCompile *cfg, MonoBasicBlock *bb, MonoInst **sp, int count) {
        int i, bindex;
        MonoBasicBlock *outb;
        MonoInst *inst, **locals;
        MonoStackSlot *stack_state;
        gboolean found;

        if (!count)
                return 0;
        if (cfg->verbose_level > 3)
                g_print ("%d item(s) on exit from B%d\n", count, bb->block_num);

        stack_state = mono_mempool_alloc (cfg->mempool, sizeof (MonoStackSlot) * count);
        for (i = 0; i < count; ++i) {
                stack_state [i].type = sp [i]->type;
                stack_state [i].klass = sp [i]->klass;

                /* Check that instructions other than ldnull have ins->klass set */
                if (!cfg->dont_verify_stack_merge && (sp [i]->type == STACK_OBJ) && !((sp [i]->opcode == OP_PCONST) && sp [i]->inst_c0 == 0))
                        g_assert (sp [i]->klass);
        }

        /* Perform verification and stack state merge */
        for (i = 0; i < bb->out_count; ++i) {
                outb = bb->out_bb [i];

                /* exception handlers are linked, but they should not be considered for stack args */
                if (outb->flags & BB_EXCEPTION_HANDLER)
                        continue;
                if (outb->stack_state) {
                        gboolean verified;

                        if (count != outb->in_scount) {
                                cfg->unverifiable = TRUE;
                                return 0;
                        }
                        verified = merge_stacks (cfg, stack_state, outb->stack_state, count);
                        if (!verified) {
                                cfg->unverifiable = TRUE;
                                return 0;
                        }

                        if (cfg->verbose_level > 3) {
                                int j;

                                for (j = 0; j < count; ++j)
                                        printf ("\tStack state of BB%d, slot %d=%d\n", outb->block_num, j, outb->stack_state [j].type);
                        }
                } else {
                        /* Make a copy of the stack state */
                        outb->stack_state = mono_mempool_alloc (cfg->mempool, sizeof (MonoStackSlot) * count);
                        memcpy (outb->stack_state, stack_state, sizeof (MonoStackSlot) * count);
                }
        }

        if (!bb->out_scount) {
                bb->out_scount = count;
                //g_print ("bblock %d has out:", bb->block_num);
                found = FALSE;
                for (i = 0; i < bb->out_count; ++i) {
                        outb = bb->out_bb [i];
                        /* exception handlers are linked, but they should not be considered for stack args */
                        if (outb->flags & BB_EXCEPTION_HANDLER)
                                continue;
                        //g_print (" %d", outb->block_num);
                        if (outb->in_stack) {
                                found = TRUE;
                                bb->out_stack = outb->in_stack;
                                break;
                        }
                }
                //g_print ("\n");
                if (!found) {
                        bb->out_stack = mono_mempool_alloc (cfg->mempool, sizeof (MonoInst*) * count);
                        for (i = 0; i < count; ++i) {
                                /* 
                                 * try to reuse temps already allocated for this purpouse, if they occupy the same
                                 * stack slot and if they are of the same type.
                                 * This won't cause conflicts since if 'local' is used to 
                                 * store one of the values in the in_stack of a bblock, then
                                 * the same variable will be used for the same outgoing stack 
                                 * slot as well. 
                                 * This doesn't work when inlining methods, since the bblocks
                                 * in the inlined methods do not inherit their in_stack from
                                 * the bblock they are inlined to. See bug #58863 for an
                                 * example.
                                 * This hack is disabled since it also prevents proper tracking of types.
                                 */
#if 1
                                bb->out_stack [i] = mono_compile_create_var (cfg, type_from_stack_type (sp [i]), OP_LOCAL);
#else
                                if (cfg->inlined_method)
                                        bb->out_stack [i] = mono_compile_create_var (cfg, type_from_stack_type (sp [i]), OP_LOCAL);
                                else
                                        bb->out_stack [i] = mono_compile_get_interface_var (cfg, i, sp [i]);
#endif
                        }
                }
        }

        for (i = 0; i < bb->out_count; ++i) {
                outb = bb->out_bb [i];
                /* exception handlers are linked, but they should not be considered for stack args */
                if (outb->flags & BB_EXCEPTION_HANDLER)
                        continue;
                if (outb->in_scount) {
                        if (outb->in_scount != bb->out_scount)
                                G_BREAKPOINT ();
                        continue; /* check they are the same locals */
                }
                outb->in_scount = count;
                outb->in_stack = bb->out_stack;
        }

        locals = bb->out_stack;
        for (i = 0; i < count; ++i) {
                /* add store ops at the end of the bb, before the branch */
                NEW_TEMPSTORE (cfg, inst, locals [i]->inst_c0, sp [i]);
                if (inst->opcode == CEE_STOBJ) {
                        NEW_TEMPLOADA (cfg, inst, locals [i]->inst_c0);
                        handle_stobj (cfg, bb, inst, sp [i], sp [i]->cil_code, inst->klass, TRUE, FALSE, FALSE);
                } else {
                        inst->cil_code = sp [i]->cil_code;
                        mono_add_ins_to_end (bb, inst);
                }
                if (cfg->verbose_level > 3)
                        g_print ("storing %d to temp %d\n", i, (int)locals [i]->inst_c0);
        }

        /*
         * It is possible that the out bblocks already have in_stack assigned, and
         * the in_stacks differ. In this case, we will store to all the different 
         * in_stacks.
         */

        found = TRUE;
        bindex = 0;
        while (found) {
                /* Find a bblock which has a different in_stack */
                found = FALSE;
                while (bindex < bb->out_count) {
                        outb = bb->out_bb [bindex];
                        /* exception handlers are linked, but they should not be considered for stack args */
                        if (outb->flags & BB_EXCEPTION_HANDLER) {
                                bindex++;
                                continue;
                        }
                        if (outb->in_stack != locals) {
                                /* 
                                 * Instead of storing sp [i] to locals [i], we need to store
                                 * locals [i] to <new locals>[i], since the sp [i] tree can't
                                 * be shared between trees.
                                 */
                                for (i = 0; i < count; ++i)
                                        mono_add_varcopy_to_end (cfg, bb, locals [i]->inst_c0, outb->in_stack [i]->inst_c0);
                                locals = outb->in_stack;
                                found = TRUE;
                                break;
                        }
                        bindex ++;
                }
        }
        
        return 0;
}

static int
ret_type_to_call_opcode (MonoType *type, int calli, int virt)
{
        if (type->byref)
                return calli? OP_CALL_REG: virt? CEE_CALLVIRT: CEE_CALL;

handle_enum:
        switch (type->type) {
        case MONO_TYPE_VOID:
                return calli? OP_VOIDCALL_REG: virt? OP_VOIDCALLVIRT: OP_VOIDCALL;
        case MONO_TYPE_I1:
        case MONO_TYPE_U1:
        case MONO_TYPE_BOOLEAN:
        case MONO_TYPE_I2:
        case MONO_TYPE_U2:
        case MONO_TYPE_CHAR:
        case MONO_TYPE_I4:
        case MONO_TYPE_U4:
                return calli? OP_CALL_REG: virt? CEE_CALLVIRT: CEE_CALL;
        case MONO_TYPE_I:
        case MONO_TYPE_U:
        case MONO_TYPE_PTR:
        case MONO_TYPE_FNPTR:
                return calli? OP_CALL_REG: virt? CEE_CALLVIRT: CEE_CALL;
        case MONO_TYPE_CLASS:
        case MONO_TYPE_STRING:
        case MONO_TYPE_OBJECT:
        case MONO_TYPE_SZARRAY:
        case MONO_TYPE_ARRAY:    
                return calli? OP_CALL_REG: virt? CEE_CALLVIRT: CEE_CALL;
        case MONO_TYPE_I8:
        case MONO_TYPE_U8:
                return calli? OP_LCALL_REG: virt? OP_LCALLVIRT: OP_LCALL;
        case MONO_TYPE_R4:
        case MONO_TYPE_R8:
                return calli? OP_FCALL_REG: virt? OP_FCALLVIRT: OP_FCALL;
        case MONO_TYPE_VALUETYPE:
                if (type->data.klass->enumtype) {
                        type = type->data.klass->enum_basetype;
                        goto handle_enum;
                } else
                        return calli? OP_VCALL_REG: virt? OP_VCALLVIRT: OP_VCALL;
        case MONO_TYPE_TYPEDBYREF:
                return calli? OP_VCALL_REG: virt? OP_VCALLVIRT: OP_VCALL;
        case MONO_TYPE_GENERICINST:
                type = &type->data.generic_class->container_class->byval_arg;
                goto handle_enum;
        default:
                g_error ("unknown type 0x%02x in ret_type_to_call_opcode", type->type);
        }
        return -1;
}

void
mono_create_jump_table (MonoCompile *cfg, MonoInst *label, MonoBasicBlock **bbs, int num_blocks)
{
        MonoJumpInfo *ji = mono_mempool_alloc (cfg->mempool, sizeof (MonoJumpInfo));
        MonoJumpInfoBBTable *table;

        table = mono_mempool_alloc (cfg->mempool, sizeof (MonoJumpInfoBBTable));
        table->table = bbs;
        table->table_size = num_blocks;
        
        ji->ip.label = label;
        ji->type = MONO_PATCH_INFO_SWITCH;
        ji->data.table = table;
        ji->next = cfg->patch_info;
        cfg->patch_info = ji;
}

static void
mono_save_token_info (MonoCompile *cfg, MonoImage *image, guint32 token, gpointer key)
{
        if (cfg->compile_aot) {
                MonoJumpInfoToken *jump_info_token = mono_mempool_alloc0 (cfg->mempool, sizeof (MonoJumpInfoToken));
                jump_info_token->image = image;
                jump_info_token->token = token;
                g_hash_table_insert (cfg->token_info_hash, key, jump_info_token);
        }
}

/*
 * When we add a tree of instructions, we need to ensure the instructions currently
 * on the stack are executed before (like, if we load a value from a local).
 * We ensure this by saving the currently loaded values to temps and rewriting the
 * instructions to load the values.
 * This is not done for opcodes that terminate a basic block (because it's handled already
 * by handle_stack_args ()) and for opcodes that can't change values, like POP.
 */
static void
handle_loaded_temps (MonoCompile *cfg, MonoBasicBlock *bblock, MonoInst **stack, MonoInst **sp)
{
        MonoInst *load, *store, *temp, *ins;

        while (stack < sp) {
                ins = *stack;
                /* handle also other constants */
                if ((ins->opcode != OP_ICONST) &&
                    /* temps never get written to again, so we can safely avoid duplicating them */
                    !(ins->ssa_op == MONO_SSA_LOAD && ins->inst_i0->opcode == OP_LOCAL && ins->inst_i0->flags & MONO_INST_IS_TEMP)) {
                        temp = mono_compile_create_var (cfg, type_from_stack_type (ins), OP_LOCAL);
                        temp->flags |= MONO_INST_IS_TEMP;
                        NEW_TEMPSTORE (cfg, store, temp->inst_c0, ins);
                        store->cil_code = ins->cil_code;
                        if (store->opcode == CEE_STOBJ) {
                                NEW_TEMPLOADA (cfg, store, temp->inst_c0);
                                handle_stobj (cfg, bblock, store, ins, ins->cil_code, temp->klass, FALSE, FALSE, FALSE);
                        } else
                                MONO_ADD_INS (bblock, store);
                        NEW_TEMPLOAD (cfg, load, temp->inst_c0);
                        load->cil_code = ins->cil_code;
                        *stack = load;
                }
                stack++;
        }
}

/*
 * target_type_is_incompatible:
 * @cfg: MonoCompile context
 *
 * Check that the item @arg on the evaluation stack can be stored
 * in the target type (can be a local, or field, etc).
 * The cfg arg can be used to check if we need verification or just
 * validity checks.
 *
 * Returns: non-0 value if arg can't be stored on a target.
 */
static int
target_type_is_incompatible (MonoCompile *cfg, MonoType *target, MonoInst *arg)
{
        MonoType *simple_type;
        MonoClass *klass;

        if (target->byref) {
                /* FIXME: check that the pointed to types match */
                if (arg->type == STACK_MP)
                        return arg->klass != mono_class_from_mono_type (target);
                if (arg->type == STACK_PTR)
                        return 0;
                return 1;
        }
        simple_type = mono_type_get_underlying_type (target);
        switch (simple_type->type) {
        case MONO_TYPE_VOID:
                return 1;
        case MONO_TYPE_I1:
        case MONO_TYPE_U1:
        case MONO_TYPE_BOOLEAN:
        case MONO_TYPE_I2:
        case MONO_TYPE_U2:
        case MONO_TYPE_CHAR:
        case MONO_TYPE_I4:
        case MONO_TYPE_U4:
                if (arg->type != STACK_I4 && arg->type != STACK_PTR)
                        return 1;
                return 0;
        case MONO_TYPE_PTR:
                /* STACK_MP is needed when setting pinned locals */
                if (arg->type != STACK_I4 && arg->type != STACK_PTR && arg->type != STACK_MP)
                        return 1;
                return 0;
        case MONO_TYPE_I:
        case MONO_TYPE_U:
        case MONO_TYPE_FNPTR:
                if (arg->type != STACK_I4 && arg->type != STACK_PTR)
                        return 1;
                return 0;
        case MONO_TYPE_OBJECT:
                if (arg->type != STACK_OBJ)
                        return 1;
                return 0;
        case MONO_TYPE_STRING:
                if (arg->type != STACK_OBJ)
                        return 1;
                /* ldnull has arg->klass unset */
                /*if (arg->klass && arg->klass != mono_defaults.string_class) {
                        G_BREAKPOINT ();
                        return 1;
                }*/
                return 0;
        case MONO_TYPE_CLASS:
        case MONO_TYPE_SZARRAY:
        case MONO_TYPE_ARRAY:    
                if (arg->type != STACK_OBJ)
                        return 1;
                /* FIXME: check type compatibility */
                return 0;
        case MONO_TYPE_I8:
        case MONO_TYPE_U8:
                if (arg->type != STACK_I8)
                        return 1;
                return 0;
        case MONO_TYPE_R4:
        case MONO_TYPE_R8:
                if (arg->type != STACK_R8)
                        return 1;
                return 0;
        case MONO_TYPE_VALUETYPE:
                if (arg->type != STACK_VTYPE)
                        return 1;
                klass = mono_class_from_mono_type (simple_type);
                if (klass != arg->klass)
                        return 1;
                return 0;
        case MONO_TYPE_TYPEDBYREF:
                if (arg->type != STACK_VTYPE)
                        return 1;
                klass = mono_class_from_mono_type (simple_type);
                if (klass != arg->klass)
                        return 1;
                return 0;
        case MONO_TYPE_GENERICINST:
                if (mono_type_generic_inst_is_valuetype (simple_type)) {
                        klass = mono_class_from_mono_type (simple_type);
                        if (klass->enumtype)
                                return target_type_is_incompatible (cfg, klass->enum_basetype, arg);
                        if (arg->type != STACK_VTYPE)
                                return 1;
                        if (klass != arg->klass)
                                return 1;
                        return 0;
                } else {
                        if (arg->type != STACK_OBJ)
                                return 1;
                        /* FIXME: check type compatibility */
                        return 0;
                }
        default:
                g_error ("unknown type 0x%02x in target_type_is_incompatible", simple_type->type);
        }
        return 1;
}

/*
 * Prepare arguments for passing to a function call.
 * Return a non-zero value if the arguments can't be passed to the given
 * signature.
 * The type checks are not yet complete and some conversions may need
 * casts on 32 or 64 bit architectures.
 *
 * FIXME: implement this using target_type_is_incompatible ()
 */
static int
check_call_signature (MonoCompile *cfg, MonoMethodSignature *sig, MonoInst **args)
{
        MonoType *simple_type;
        int i;

        if (sig->hasthis) {
                if (args [0]->type != STACK_OBJ && args [0]->type != STACK_MP && args [0]->type != STACK_PTR)
                        return 1;
                args++;
        }
        for (i = 0; i < sig->param_count; ++i) {
                if (sig->params [i]->byref) {
                        if (args [i]->type != STACK_MP && args [i]->type != STACK_PTR)
                                return 1;
                        continue;
                }
                simple_type = sig->params [i];
handle_enum:
                switch (simple_type->type) {
                case MONO_TYPE_VOID:
                        return 1;
                        continue;
                case MONO_TYPE_I1:
                case MONO_TYPE_U1:
                case MONO_TYPE_BOOLEAN:
                case MONO_TYPE_I2:
                case MONO_TYPE_U2:
                case MONO_TYPE_CHAR:
                case MONO_TYPE_I4:
                case MONO_TYPE_U4:
                        if (args [i]->type != STACK_I4 && args [i]->type != STACK_PTR)
                                return 1;
                        continue;
                case MONO_TYPE_I:
                case MONO_TYPE_U:
                case MONO_TYPE_PTR:
                case MONO_TYPE_FNPTR:
                        if (args [i]->type != STACK_I4 && args [i]->type != STACK_PTR && args [i]->type != STACK_MP && args [i]->type != STACK_OBJ)
                                return 1;
                        continue;
                case MONO_TYPE_CLASS:
                case MONO_TYPE_STRING:
                case MONO_TYPE_OBJECT:
                case MONO_TYPE_SZARRAY:
                case MONO_TYPE_ARRAY:    
                        if (args [i]->type != STACK_OBJ)
                                return 1;
                        continue;
                case MONO_TYPE_I8:
                case MONO_TYPE_U8:
                        if (args [i]->type != STACK_I8)
                                return 1;
                        continue;
                case MONO_TYPE_R4:
                case MONO_TYPE_R8:
                        if (args [i]->type != STACK_R8)
                                return 1;
                        continue;
                case MONO_TYPE_VALUETYPE:
                        if (simple_type->data.klass->enumtype) {
                                simple_type = simple_type->data.klass->enum_basetype;
                                goto handle_enum;
                        }
                        if (args [i]->type != STACK_VTYPE)
                                return 1;
                        continue;
                case MONO_TYPE_TYPEDBYREF:
                        if (args [i]->type != STACK_VTYPE)
                                return 1;
                        continue;
                case MONO_TYPE_GENERICINST:
                        simple_type = &simple_type->data.generic_class->container_class->byval_arg;
                        goto handle_enum;

                default:
                        g_error ("unknown type 0x%02x in check_call_signature",
                                 simple_type->type);
                }
        }
        return 0;
}

inline static int
mono_spill_call (MonoCompile *cfg, MonoBasicBlock *bblock, MonoCallInst *call, MonoMethodSignature *sig, gboolean ret_object, 
                 const guint8 *ip, gboolean to_end)
{
        MonoInst *temp, *store, *ins = (MonoInst*)call;
        MonoType *ret = sig->ret;

        if (!MONO_TYPE_IS_VOID (ret) || ret_object) {
                if (ret_object) {
                        call->inst.type = STACK_OBJ;
                        call->inst.opcode = CEE_CALL;
                        temp = mono_compile_create_var (cfg, &mono_defaults.string_class->byval_arg, OP_LOCAL);
                } else {
                        type_to_eval_stack_type (ret, ins);
                        temp = mono_compile_create_var (cfg, ret, OP_LOCAL);
                }
                
                temp->flags |= MONO_INST_IS_TEMP;

                if (MONO_TYPE_ISSTRUCT (ret)) {
                        MonoInst *loada, *dummy_store;

                        /* 
                         * Emit a dummy store to the local holding the result so the
                         * liveness info remains correct.
                         */
                        NEW_DUMMY_STORE (cfg, dummy_store, temp->inst_c0);
                        if (to_end)
                                mono_add_ins_to_end (bblock, dummy_store);
                        else
                                MONO_ADD_INS (bblock, dummy_store);

                        /* we use this to allocate native sized structs */
                        temp->backend.is_pinvoke = sig->pinvoke;

                        NEW_TEMPLOADA (cfg, loada, temp->inst_c0);
                        if (call->inst.opcode == OP_VCALL)
                                ins->inst_left = loada;
                        else
                                ins->inst_right = loada; /* a virtual or indirect call */

                        if (to_end)
                                mono_add_ins_to_end (bblock, ins);
                        else
                                MONO_ADD_INS (bblock, ins);
                } else {
                        NEW_TEMPSTORE (cfg, store, temp->inst_c0, ins);
                        store->cil_code = ip;
                        if (to_end)
                                mono_add_ins_to_end (bblock, store);
                        else
                                MONO_ADD_INS (bblock, store);
                }
                return temp->inst_c0;
        } else {
                if (to_end)
                        mono_add_ins_to_end (bblock, ins);
                else
                        MONO_ADD_INS (bblock, ins);
                return -1;
        }
}

inline static MonoCallInst *
mono_emit_call_args (MonoCompile *cfg, MonoBasicBlock *bblock, MonoMethodSignature *sig, 
                     MonoInst **args, int calli, int virtual, const guint8 *ip, gboolean to_end)
{
        MonoCallInst *call;
        MonoInst *arg;

        MONO_INST_NEW_CALL (cfg, call, ret_type_to_call_opcode (sig->ret, calli, virtual));

#ifdef MONO_ARCH_SOFT_FLOAT
        /* we need to convert the r4 value to an int value */
        {
                int i;
                for (i = 0; i < sig->param_count; ++i) {
                        if (!sig->params [i]->byref && sig->params [i]->type == MONO_TYPE_R4) {
                                MonoInst *iargs [1];
                                int temp;
                                iargs [0] = args [i + sig->hasthis];

                                temp = mono_emit_jit_icall (cfg, bblock, mono_fload_r4_arg, iargs, ip);
                                NEW_TEMPLOAD (cfg, arg, temp);
                                args [i + sig->hasthis] = arg;
                        }
                }
        }
#endif

        call->inst.cil_code = ip;
        call->args = args;
        call->signature = sig;
        call = mono_arch_call_opcode (cfg, bblock, call, virtual);
        type_to_eval_stack_type (sig->ret, &call->inst);

        for (arg = call->out_args; arg;) {
                MonoInst *narg = arg->next;
                arg->next = NULL;
                if (!arg->cil_code)
                        arg->cil_code = ip;
                if (to_end)
                        mono_add_ins_to_end (bblock, arg);
                else
                        MONO_ADD_INS (bblock, arg);
                arg = narg;
        }
        return call;
}

inline static int
mono_emit_calli (MonoCompile *cfg, MonoBasicBlock *bblock, MonoMethodSignature *sig, 
                 MonoInst **args, MonoInst *addr, const guint8 *ip)
{
        MonoCallInst *call = mono_emit_call_args (cfg, bblock, sig, args, TRUE, FALSE, ip, FALSE);

        call->inst.inst_i0 = addr;

        return mono_spill_call (cfg, bblock, call, sig, FALSE, ip, FALSE);
}

static MonoCallInst*
mono_emit_method_call_full (MonoCompile *cfg, MonoBasicBlock *bblock, MonoMethod *method, MonoMethodSignature *sig,
                       MonoInst **args, const guint8 *ip, MonoInst *this, gboolean to_end)
{
        gboolean virtual = this != NULL;
        MonoCallInst *call;

        call = mono_emit_call_args (cfg, bblock, sig, args, FALSE, virtual, ip, to_end);

        if (this && sig->hasthis && 
            (method->klass->marshalbyref || method->klass == mono_defaults.object_class) && 
            !(method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !MONO_CHECK_THIS (this)) {
                call->method = mono_marshal_get_remoting_invoke_with_check (method);
        } else {
                call->method = method;
        }
        call->inst.flags |= MONO_INST_HAS_METHOD;
        call->inst.inst_left = this;

        if (call->method->klass->flags & TYPE_ATTRIBUTE_INTERFACE)
                /* Needed by the code generated in inssel.brg */
                mono_get_got_var (cfg);

        return call;
}

static MonoCallInst*
mono_emit_method_call (MonoCompile *cfg, MonoBasicBlock *bblock, MonoMethod *method, MonoMethodSignature *sig,
                       MonoInst **args, const guint8 *ip, MonoInst *this)
{
        return mono_emit_method_call_full (cfg, bblock, method, sig, args, ip, this, FALSE);
}

inline static int
mono_emit_method_call_spilled (MonoCompile *cfg, MonoBasicBlock *bblock, MonoMethod *method,  
                       MonoMethodSignature *signature, MonoInst **args, const guint8 *ip, MonoInst *this)
{
        MonoCallInst *call = mono_emit_method_call (cfg, bblock, method, signature, args, ip, this);

        return mono_spill_call (cfg, bblock, call, signature, method->string_ctor, ip, FALSE);
}

inline static int
mono_emit_method_call_spilled_full (MonoCompile *cfg, MonoBasicBlock *bblock, MonoMethod *method,  
                       MonoMethodSignature *signature, MonoInst **args, const guint8 *ip, MonoInst *this,
                       gboolean ret_object, gboolean to_end)
{
        MonoCallInst *call = mono_emit_method_call_full (cfg, bblock, method, signature, args, ip, this, to_end);

        return mono_spill_call (cfg, bblock, call, signature, ret_object, ip, to_end);
}

inline static int
mono_emit_native_call (MonoCompile *cfg, MonoBasicBlock *bblock, gconstpointer func, MonoMethodSignature *sig,
                       MonoInst **args, const guint8 *ip, gboolean ret_object, gboolean to_end)
{
        MonoCallInst *call;

        g_assert (sig);

        call = mono_emit_call_args (cfg, bblock, sig, args, FALSE, FALSE, ip, to_end);
        call->fptr = func;

        return mono_spill_call (cfg, bblock, call, sig, ret_object, ip, to_end);
}

inline static int
mono_emit_jit_icall (MonoCompile *cfg, MonoBasicBlock *bblock, gconstpointer func, MonoInst **args, const guint8 *ip)
{
        MonoJitICallInfo *info = mono_find_jit_icall_by_addr (func);
        
        if (!info) {
                g_warning ("unregistered JIT ICall");
                g_assert_not_reached ();
        }

        return mono_emit_native_call (cfg, bblock, mono_icall_get_wrapper (info), info->sig, args, ip, FALSE, FALSE);
}

static void
mono_emulate_opcode (MonoCompile *cfg, MonoInst *tree, MonoInst **iargs, MonoJitICallInfo *info)
{
        MonoInst *ins, *temp = NULL, *store, *load, *begin;
        MonoInst *last_arg = NULL;
        int nargs;
        MonoCallInst *call;

        //g_print ("emulating: ");
        //mono_print_tree_nl (tree);
        MONO_INST_NEW_CALL (cfg, call, ret_type_to_call_opcode (info->sig->ret, FALSE, FALSE));
        ins = (MonoInst*)call;
        
        call->inst.cil_code = tree->cil_code;
        call->args = iargs;
        call->signature = info->sig;

        call = mono_arch_call_opcode (cfg, cfg->cbb, call, FALSE);

        if (!MONO_TYPE_IS_VOID (info->sig->ret)) {
                temp = mono_compile_create_var (cfg, info->sig->ret, OP_LOCAL);
                temp->flags |= MONO_INST_IS_TEMP;
                NEW_TEMPSTORE (cfg, store, temp->inst_c0, ins);
                store->cil_code = tree->cil_code;
        } else {
                store = ins;
        }

        nargs = info->sig->param_count + info->sig->hasthis;

        for (last_arg = call->out_args; last_arg && last_arg->next; last_arg = last_arg->next) ;

        if (nargs)
                last_arg->next = store;

        if (nargs)
                begin = call->out_args;
        else
                begin = store;

        if (cfg->prev_ins) {
                /* 
                 * This assumes that that in a tree, emulate_opcode is called for a
                 * node before it is called for its children. dec_foreach needs to
                 * take this into account.
                 */
                store->next = cfg->prev_ins->next;
                cfg->prev_ins->next = begin;
        } else {
                store->next = cfg->cbb->code;
                cfg->cbb->code = begin;
        }

        call->fptr = mono_icall_get_wrapper (info);

        if (!MONO_TYPE_IS_VOID (info->sig->ret)) {
                NEW_TEMPLOAD (cfg, load, temp->inst_c0);
                *tree = *load;
        }
}

static MonoMethodSignature *
mono_get_array_new_va_signature (int arity)
{
        static GHashTable *sighash = NULL;
        MonoMethodSignature *res;
        int i;

        mono_jit_lock ();
        if (!sighash) {
                sighash = g_hash_table_new (NULL, NULL);
        }
        else if ((res = g_hash_table_lookup (sighash, GINT_TO_POINTER (arity)))) {
                mono_jit_unlock ();
                return res;
        }

        res = mono_metadata_signature_alloc (mono_defaults.corlib, arity + 1);

        res->pinvoke = 1;
#ifdef MONO_ARCH_VARARG_ICALLS
        /* Only set this only some archs since not all backends can handle varargs+pinvoke */
        res->call_convention = MONO_CALL_VARARG;
#endif

#ifdef PLATFORM_WIN32
        res->call_convention = MONO_CALL_C;
#endif

        res->params [0] = &mono_defaults.int_class->byval_arg;  
        for (i = 0; i < arity; i++)
                res->params [i + 1] = &mono_defaults.int_class->byval_arg;

        res->ret = &mono_defaults.int_class->byval_arg;

        g_hash_table_insert (sighash, GINT_TO_POINTER (arity), res);
        mono_jit_unlock ();

        return res;
}

#ifdef MONO_ARCH_SOFT_FLOAT
static void
handle_store_float (MonoCompile *cfg, MonoBasicBlock *bblock, MonoInst *ptr, MonoInst *val, const unsigned char *ip)
{
        MonoInst *iargs [2];
        iargs [0] = val;
        iargs [1] = ptr;

        mono_emit_jit_icall (cfg, bblock, mono_fstore_r4, iargs, ip);
}

static int
handle_load_float (MonoCompile *cfg, MonoBasicBlock *bblock, MonoInst *ptr, const unsigned char *ip)
{
        MonoInst *iargs [1];
        iargs [0] = ptr;

        return mono_emit_jit_icall (cfg, bblock, mono_fload_r4, iargs, ip);
}

#define LDLOC_SOFT_FLOAT(cfg,ins,idx,ip) do {\
                if (header->locals [(idx)]->type == MONO_TYPE_R4 && !header->locals [(idx)]->byref) {   \
                        int temp;       \
                        NEW_LOCLOADA (cfg, (ins), (idx));       \
                        temp = handle_load_float (cfg, bblock, (ins), (ip));    \
                        NEW_TEMPLOAD (cfg, (ins), temp);        \
                }       \
        } while (0)
#define STLOC_SOFT_FLOAT(cfg,ins,idx,ip) do {\
                if (header->locals [(idx)]->type == MONO_TYPE_R4 && !header->locals [(idx)]->byref) {   \
                        int temp;       \
                        NEW_LOCLOADA (cfg, (ins), (idx));       \
                        handle_store_float (cfg, bblock, (ins), *sp, (ip));     \
                        MONO_INST_NEW (cfg, (ins), OP_NOP);     \
                }       \
        } while (0)
#define LDARG_SOFT_FLOAT(cfg,ins,idx,ip) do {\
                if (param_types [(idx)]->type == MONO_TYPE_R4 && !param_types [(idx)]->byref) { \
                        int temp;       \
                        NEW_ARGLOADA (cfg, (ins), (idx));       \
                        temp = handle_load_float (cfg, bblock, (ins), (ip));    \
                        NEW_TEMPLOAD (cfg, (ins), temp);        \
                }       \
        } while (0)
#define STARG_SOFT_FLOAT(cfg,ins,idx,ip) do {\
                if (param_types [(idx)]->type == MONO_TYPE_R4 && !param_types [(idx)]->byref) { \
                        int temp;       \
                        NEW_ARGLOADA (cfg, (ins), (idx));       \
                        handle_store_float (cfg, bblock, (ins), *sp, (ip));     \
                        MONO_INST_NEW (cfg, (ins), OP_NOP);     \
                }       \
        } while (0)
#else
#define LDLOC_SOFT_FLOAT(cfg,ins,idx,ip)
#define STLOC_SOFT_FLOAT(cfg,ins,idx,ip)
#define LDARG_SOFT_FLOAT(cfg,ins,idx,ip)
#define STARG_SOFT_FLOAT(cfg,ins,idx,ip)
#endif

static MonoMethod*
get_memcpy_method (void)
{
        static MonoMethod *memcpy_method = NULL;
        if (!memcpy_method) {
                memcpy_method = mono_class_get_method_from_name (mono_defaults.string_class, "memcpy", 3);
                if (!memcpy_method)
                        g_error ("Old corlib found. Install a new one");
        }
        return memcpy_method;
}

static void
handle_stobj (MonoCompile *cfg, MonoBasicBlock *bblock, MonoInst *dest, MonoInst *src, const unsigned char *ip, MonoClass *klass, gboolean to_end, gboolean native, gboolean write_barrier) {
        MonoInst *iargs [3];
        int n;
        guint32 align = 0;
        MonoMethod *memcpy_method;

        g_assert (klass);
        /*
         * This check breaks with spilled vars... need to handle it during verification anyway.
         * g_assert (klass && klass == src->klass && klass == dest->klass);
         */

        if (native)
                n = mono_class_native_size (klass, &align);
        else
                n = mono_class_value_size (klass, &align);

#if HAVE_WRITE_BARRIERS
        /* if native is true there should be no references in the struct */
        if (write_barrier && klass->has_references && !native) {
                iargs [0] = dest;
                iargs [1] = src;
                NEW_PCONST (cfg, iargs [2], klass);

                mono_emit_jit_icall (cfg, bblock, mono_value_copy, iargs, ip);
                return;
        }
#endif

        /* FIXME: add write barrier handling */
        if ((cfg->opt & MONO_OPT_INTRINS) && !to_end && n <= sizeof (gpointer) * 5) {
                MonoInst *inst;
                if (dest->opcode == OP_LDADDR) {
                        /* Keep liveness info correct */
                        NEW_DUMMY_STORE (cfg, inst, dest->inst_i0->inst_c0);
                        MONO_ADD_INS (bblock, inst);
                }
                MONO_INST_NEW (cfg, inst, OP_MEMCPY);
                inst->inst_left = dest;
                inst->inst_right = src;
                inst->cil_code = ip;
                inst->backend.size = n;
                MONO_ADD_INS (bblock, inst);
                return;
        }
        iargs [0] = dest;
        iargs [1] = src;
        NEW_ICONST (cfg, iargs [2], n);

        memcpy_method = get_memcpy_method ();
        mono_emit_method_call_spilled_full (cfg, bblock, memcpy_method, memcpy_method->signature, iargs, ip, NULL, FALSE, to_end);
}

static MonoMethod*
get_memset_method (void)
{
        static MonoMethod *memset_method = NULL;
        if (!memset_method) {
                memset_method = mono_class_get_method_from_name (mono_defaults.string_class, "memset", 3);
                if (!memset_method)
                        g_error ("Old corlib found. Install a new one");
        }
        return memset_method;
}

static void
handle_initobj (MonoCompile *cfg, MonoBasicBlock *bblock, MonoInst *dest, const guchar *ip, MonoClass *klass, MonoInst **stack_start, MonoInst **sp)
{
        MonoInst *iargs [3];
        MonoInst *ins, *zero_int32;
        int n;
        MonoMethod *memset_method;

        NEW_ICONST (cfg, zero_int32, 0);

        mono_class_init (klass);
        n = mono_class_value_size (klass, NULL);
        MONO_INST_NEW (cfg, ins, 0);
        ins->cil_code = ip;
        ins->inst_left = dest;
        ins->inst_right = zero_int32;
        switch (n) {
        case 1:
                ins->opcode = CEE_STIND_I1;
                MONO_ADD_INS (bblock, ins);
                break;
        case 2:
                ins->opcode = CEE_STIND_I2;
                MONO_ADD_INS (bblock, ins);
                break;
        case 4:
                ins->opcode = CEE_STIND_I4;
                MONO_ADD_INS (bblock, ins);
                break;
        default:
                if (n <= sizeof (gpointer) * 5) {
                        ins->opcode = OP_MEMSET;
                        ins->inst_imm = 0;
                        ins->backend.size = n;
                        MONO_ADD_INS (bblock, ins);
                        break;
                }
                memset_method = get_memset_method ();
                handle_loaded_temps (cfg, bblock, stack_start, sp);
                iargs [0] = dest;
                NEW_ICONST (cfg, iargs [1], 0);
                NEW_ICONST (cfg, iargs [2], n);
                mono_emit_method_call_spilled (cfg, bblock, memset_method, memset_method->signature, iargs, ip, NULL);
                break;
        }
}

static int
handle_alloc (MonoCompile *cfg, MonoBasicBlock *bblock, MonoClass *klass, gboolean for_box, const guchar *ip)
{
        MonoInst *iargs [2];
        void *alloc_ftn;

        if (cfg->opt & MONO_OPT_SHARED) {
                NEW_DOMAINCONST (cfg, iargs [0]);
                NEW_CLASSCONST (cfg, iargs [1], klass);

                alloc_ftn = mono_object_new;
        } else if (cfg->compile_aot && bblock->out_of_line && klass->type_token && klass->image == mono_defaults.corlib) {
                /* This happens often in argument checking code, eg. throw new FooException... */
                /* Avoid relocations by calling a helper function specialized to mscorlib */
                NEW_ICONST (cfg, iargs [0], mono_metadata_token_index (klass->type_token));
                return mono_emit_jit_icall (cfg, bblock, mono_helper_newobj_mscorlib, iargs, ip);
        } else {
                MonoVTable *vtable = mono_class_vtable (cfg->domain, klass);
                gboolean pass_lw;

                alloc_ftn = mono_class_get_allocation_ftn (vtable, for_box, &pass_lw);
                if (pass_lw) {
                        guint32 lw = vtable->klass->instance_size;
                        lw = ((lw + (sizeof (gpointer) - 1)) & ~(sizeof (gpointer) - 1)) / sizeof (gpointer);
                        NEW_ICONST (cfg, iargs [0], lw);
                        NEW_VTABLECONST (cfg, iargs [1], vtable);
                }
                else
                        NEW_VTABLECONST (cfg, iargs [0], vtable);
        }

        return mono_emit_jit_icall (cfg, bblock, alloc_ftn, iargs, ip);
}

/**
 * Handles unbox of a Nullable<T>, returning a temp variable
 * where the result is stored
 */
static int
handle_unbox_nullable (MonoCompile* cfg, MonoBasicBlock* bblock, MonoInst* val, const guchar *ip, MonoClass* klass)
{
       MonoMethod* method = mono_class_get_method_from_name (klass, "Unbox", 1);
       return mono_emit_method_call_spilled (cfg, bblock, method, mono_method_signature (method), &val, ip, NULL);
        
}



static MonoInst *
handle_box (MonoCompile *cfg, MonoBasicBlock *bblock, MonoInst *val, const guchar *ip, MonoClass *klass)
{
        MonoInst *dest, *vtoffset, *add, *vstore;
        int temp;

       if (mono_class_is_nullable (klass)) {
               MonoMethod* method = mono_class_get_method_from_name (klass, "Box", 1);
               temp = mono_emit_method_call_spilled (cfg, bblock, method, mono_method_signature (method), &val, ip, NULL);
               NEW_TEMPLOAD (cfg, dest, temp);
               return dest;
       }


        temp = handle_alloc (cfg, bblock, klass, TRUE, ip);
        NEW_TEMPLOAD (cfg, dest, temp);
        NEW_ICONST (cfg, vtoffset, sizeof (MonoObject));
        MONO_INST_NEW (cfg, add, OP_PADD);
        add->inst_left = dest;
        add->inst_right = vtoffset;
        add->cil_code = ip;
        add->klass = klass;
        MONO_INST_NEW (cfg, vstore, CEE_STIND_I);
        vstore->opcode = mono_type_to_stind (&klass->byval_arg);
        vstore->cil_code = ip;
        vstore->inst_left = add;
        vstore->inst_right = val;

#ifdef MONO_ARCH_SOFT_FLOAT
        if (vstore->opcode == CEE_STIND_R4) {
                handle_store_float (cfg, bblock, add, val, ip);
        } else
#endif
        if (vstore->opcode == CEE_STOBJ) {
                handle_stobj (cfg, bblock, add, val, ip, klass, FALSE, FALSE, TRUE);
        } else
                MONO_ADD_INS (bblock, vstore);

        NEW_TEMPLOAD (cfg, dest, temp);
        return dest;
}

static int
handle_array_new (MonoCompile *cfg, MonoBasicBlock *bblock, int rank, MonoInst **sp, unsigned char *ip)
{
        MonoMethodSignature *esig;
        char icall_name [256];
        char *name;
        MonoJitICallInfo *info;

        /* Need to register the icall so it gets an icall wrapper */
        sprintf (icall_name, "ves_array_new_va_%d", rank);

        mono_jit_lock ();
        info = mono_find_jit_icall_by_name (icall_name);
        if (info == NULL) {
                esig = mono_get_array_new_va_signature (rank);
                name = g_strdup (icall_name);
                info = mono_register_jit_icall (mono_array_new_va, name, esig, FALSE);

                g_hash_table_insert (jit_icall_name_hash, name, name);
        }
        mono_jit_unlock ();

        cfg->flags |= MONO_CFG_HAS_VARARGS;

        /* FIXME: This uses info->sig, but it should use the signature of the wrapper */
        return mono_emit_native_call (cfg, bblock, mono_icall_get_wrapper (info), info->sig, sp, ip, TRUE, FALSE);
}

static void
mono_emit_load_got_addr (MonoCompile *cfg)
{
        MonoInst *load, *store, *dummy_use;
        MonoInst *get_got;

        if (!cfg->got_var || cfg->got_var_allocated)
                return;

        MONO_INST_NEW (cfg, get_got, OP_LOAD_GOTADDR);
        NEW_TEMPSTORE (cfg, store, cfg->got_var->inst_c0, get_got);

        /* Add it to the start of the first bblock */
        if (cfg->bb_entry->code) {
                store->next = cfg->bb_entry->code;
                cfg->bb_entry->code = store;
        }
        else
                MONO_ADD_INS (cfg->bb_entry, store);

        cfg->got_var_allocated = TRUE;

        /* 
         * Add a dummy use to keep the got_var alive, since real uses might
         * only be generated in the decompose or instruction selection phases.
         * Add it to end_bblock, so the variable's lifetime covers the whole
         * method.
         */
        NEW_TEMPLOAD (cfg, load, cfg->got_var->inst_c0);
        NEW_DUMMY_USE (cfg, dummy_use, load);
        MONO_ADD_INS (cfg->bb_exit, dummy_use);
}

#define CODE_IS_STLOC(ip) (((ip) [0] >= CEE_STLOC_0 && (ip) [0] <= CEE_STLOC_3) || ((ip) [0] == CEE_STLOC_S))

static gboolean
mini_class_is_system_array (MonoClass *klass)
{
        if (klass->parent == mono_defaults.array_class)
                return TRUE;
        else
                return FALSE;
}

static gboolean
mono_method_check_inlining (MonoCompile *cfg, MonoMethod *method)
{
        MonoMethodHeader *header = mono_method_get_header (method);
        MonoMethodSignature *signature = mono_method_signature (method);
        MonoVTable *vtable;
        int i;

#ifdef MONO_ARCH_HAVE_LMF_OPS
        if (((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
                 (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL)) &&
            !MONO_TYPE_ISSTRUCT (signature->ret) && !mini_class_is_system_array (method->klass))
                return TRUE;
#endif

        if ((method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
            (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
            (method->iflags & METHOD_IMPL_ATTRIBUTE_NOINLINING) ||
            (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED) ||
            (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL) ||
            (method->klass->marshalbyref) ||
            !header || header->num_clauses ||
            /* fixme: why cant we inline valuetype returns? */
            MONO_TYPE_ISSTRUCT (signature->ret))
                return FALSE;

#ifdef MONO_ARCH_SOFT_FLOAT
        /* this complicates things, fix later */
        if (signature->ret->type == MONO_TYPE_R4)
                return FALSE;
#endif
        /* its not worth to inline methods with valuetype arguments?? */
        for (i = 0; i < signature->param_count; i++) {
                if (MONO_TYPE_ISSTRUCT (signature->params [i])) {
                        return FALSE;
                }
#ifdef MONO_ARCH_SOFT_FLOAT
                /* this complicates things, fix later */
                if (!signature->params [i]->byref && signature->params [i]->type == MONO_TYPE_R4)
                        return FALSE;
#endif
        }

        /*
         * if we can initialize the class of the method right away, we do,
         * otherwise we don't allow inlining if the class needs initialization,
         * since it would mean inserting a call to mono_runtime_class_init()
         * inside the inlined code
         */
        if (!(cfg->opt & MONO_OPT_SHARED)) {
                vtable = mono_class_vtable (cfg->domain, method->klass);
                if (method->klass->flags & TYPE_ATTRIBUTE_BEFORE_FIELD_INIT) {
                        if (cfg->run_cctors) {
                                /* This makes so that inline cannot trigger */
                                /* .cctors: too many apps depend on them */
                                /* running with a specific order... */
                                if (! vtable->initialized)
                                        return FALSE;
                                mono_runtime_class_init (vtable);
                        }
                }
                else if (!vtable->initialized && mono_class_needs_cctor_run (method->klass, NULL))
                        return FALSE;
        } else {
                /* 
                 * If we're compiling for shared code
                 * the cctor will need to be run at aot method load time, for example,
                 * or at the end of the compilation of the inlining method.
                 */
                if (mono_class_needs_cctor_run (method->klass, NULL) && !((method->klass->flags & TYPE_ATTRIBUTE_BEFORE_FIELD_INIT)))
                        return FALSE;
        }
        //if (!MONO_TYPE_IS_VOID (signature->ret)) return FALSE;

        /*
         * CAS - do not inline methods with declarative security
         * Note: this has to be before any possible return TRUE;
         */
        if (mono_method_has_declsec (method))
                return FALSE;

        /* also consider num_locals? */
        if (getenv ("MONO_INLINELIMIT")) {
                if (header->code_size < atoi (getenv ("MONO_INLINELIMIT"))) {
                        return TRUE;
                }
        } else if (header->code_size < INLINE_LENGTH_LIMIT)
                return TRUE;

        return FALSE;
}

static gboolean
mini_field_access_needs_cctor_run (MonoCompile *cfg, MonoMethod *method, MonoVTable *vtable)
{
        if (vtable->initialized && !cfg->compile_aot)
                return FALSE;

        if (vtable->klass->flags & TYPE_ATTRIBUTE_BEFORE_FIELD_INIT)
                return FALSE;

        if (!mono_class_needs_cctor_run (vtable->klass, method))
                return FALSE;

        if (! (method->flags & METHOD_ATTRIBUTE_STATIC) && (vtable->klass == method->klass))
                /* The initialization is already done before the method is called */
                return FALSE;

        return TRUE;
}

static MonoInst*
mini_get_ldelema_ins (MonoCompile *cfg, MonoBasicBlock *bblock, MonoMethod *cmethod, MonoInst **sp, unsigned char *ip, gboolean is_set)
{
        int temp, rank;
        MonoInst *addr;
        MonoMethod *addr_method;
        int element_size;

        rank = mono_method_signature (cmethod)->param_count - (is_set? 1: 0);

        if (rank == 1) {
                MONO_INST_NEW (cfg, addr, CEE_LDELEMA);
                addr->inst_left = sp [0];
                addr->inst_right = sp [1];
                addr->cil_code = ip;
                addr->type = STACK_MP;
                addr->klass = cmethod->klass->element_class;
                return addr;
        }

        if (rank == 2 && (cfg->opt & MONO_OPT_INTRINS)) {
#if defined(MONO_ARCH_EMULATE_MUL_DIV) && !defined(MONO_ARCH_NO_EMULATE_MUL)
                /* OP_LDELEMA2D depends on OP_LMUL */
#else
                MonoInst *indexes;
                NEW_GROUP (cfg, indexes, sp [1], sp [2]);
                MONO_INST_NEW (cfg, addr, OP_LDELEMA2D);
                addr->inst_left = sp [0];
                addr->inst_right = indexes;
                addr->cil_code = ip;
                addr->type = STACK_MP;
                addr->klass = cmethod->klass->element_class;
                return addr;
#endif
        }

        element_size = mono_class_array_element_size (cmethod->klass->element_class);
        addr_method = mono_marshal_get_array_address (rank, element_size);
        temp = mono_emit_method_call_spilled (cfg, bblock, addr_method, addr_method->signature, sp, ip, NULL);
        NEW_TEMPLOAD (cfg, addr, temp);
        return addr;

}

static MonoJitICallInfo **emul_opcode_map = NULL;

MonoJitICallInfo *
mono_find_jit_opcode_emulation (int opcode)
{
        g_assert (opcode >= 0 && opcode <= OP_LAST);
        if  (emul_opcode_map)
                return emul_opcode_map [opcode];
        else
                return NULL;
}

static int
is_unsigned_regsize_type (MonoType *type)
{
        switch (type->type) {
        case MONO_TYPE_U1:
        case MONO_TYPE_U2:
        case MONO_TYPE_U4:
#if SIZEOF_VOID_P == 8
        /*case MONO_TYPE_U8: this requires different opcodes in inssel.brg */
#endif
                return TRUE;
        default:
                return FALSE;
        }
}

static MonoInst*
mini_get_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoInst **args)
{
        MonoInst *ins = NULL;
        
        static MonoClass *runtime_helpers_class = NULL;
        if (! runtime_helpers_class)
                runtime_helpers_class = mono_class_from_name (mono_defaults.corlib,
                        "System.Runtime.CompilerServices", "RuntimeHelpers");

        if (cmethod->klass == mono_defaults.string_class) {
                if (strcmp (cmethod->name, "get_Chars") == 0) {
                        MONO_INST_NEW (cfg, ins, OP_GETCHR);
                        ins->inst_i0 = args [0];
                        ins->inst_i1 = args [1];
                        return ins;
                } else if (strcmp (cmethod->name, "get_Length") == 0) {
                        MONO_INST_NEW (cfg, ins, OP_STRLEN);
                        ins->inst_i0 = args [0];
                        return ins;
                } else if (strcmp (cmethod->name, "InternalSetChar") == 0) {
                        MonoInst *get_addr;
                        MONO_INST_NEW (cfg, get_addr, OP_STR_CHAR_ADDR);
                        get_addr->inst_i0 = args [0];
                        get_addr->inst_i1 = args [1];
                        MONO_INST_NEW (cfg, ins, CEE_STIND_I2);
                        ins->inst_i0 = get_addr;
                        ins->inst_i1 = args [2];
                        return ins;
                } else 
                        return NULL;
        } else if (cmethod->klass == mono_defaults.object_class) {
                if (strcmp (cmethod->name, "GetType") == 0) {
                        MONO_INST_NEW (cfg, ins, OP_GETTYPE);
                        ins->inst_i0 = args [0];
                        return ins;
                /* The OP_GETHASHCODE rule depends on OP_MUL */
#if !defined(MONO_ARCH_EMULATE_MUL_DIV) && !defined(HAVE_MOVING_COLLECTOR)
                } else if (strcmp (cmethod->name, "InternalGetHashCode") == 0) {
                        MONO_INST_NEW (cfg, ins, OP_GETHASHCODE);
                        ins->inst_i0 = args [0];
                        return ins;
#endif
                } else if (strcmp (cmethod->name, ".ctor") == 0) {
                        MONO_INST_NEW (cfg, ins, OP_NOP);
                        return ins;
                } else
                        return NULL;
        } else if (cmethod->klass == mono_defaults.array_class) {
                if (cmethod->name [0] != 'g')
                        return NULL;

                if (strcmp (cmethod->name, "get_Rank") == 0) {
                        MONO_INST_NEW (cfg, ins, OP_ARRAY_RANK);
                        ins->inst_i0 = args [0];
                        return ins;
                } else if (strcmp (cmethod->name, "get_Length") == 0) {
                        MONO_INST_NEW (cfg, ins, CEE_LDLEN);
                        ins->inst_i0 = args [0];
                        return ins;
                } else
                        return NULL;
        } else if (cmethod->klass == runtime_helpers_class) {
                if (strcmp (cmethod->name, "get_OffsetToStringData") == 0) {
                        NEW_ICONST (cfg, ins, G_STRUCT_OFFSET (MonoString, chars));
                        return ins;
                } else
                        return NULL;
        } else if (cmethod->klass == mono_defaults.thread_class) {
                if (strcmp (cmethod->name, "get_CurrentThread") == 0 && (ins = mono_arch_get_thread_intrinsic (cfg)))
                        return ins;
        } else if (mini_class_is_system_array (cmethod->klass) &&
                        strcmp (cmethod->name, "GetGenericValueImpl") == 0) {
                MonoInst *sp [2];
                MonoInst *ldelem, *store, *load;
                MonoClass *eklass = mono_class_from_mono_type (fsig->params [1]);
                int n;
                n = mono_type_to_stind (&eklass->byval_arg);
                if (n == CEE_STOBJ)
                        return NULL;
                sp [0] = args [0];
                sp [1] = args [1];
                NEW_LDELEMA (cfg, ldelem, sp, eklass);
                ldelem->flags |= MONO_INST_NORANGECHECK;
                MONO_INST_NEW (cfg, store, n);
                n = mono_type_to_ldind (&eklass->byval_arg);
                MONO_INST_NEW (cfg, load, mono_type_to_ldind (&eklass->byval_arg));
                type_to_eval_stack_type (&eklass->byval_arg, load);
                load->inst_left = ldelem;
                store->inst_left = args [2];
                store->inst_right = load;
                return store;
        } else if (cmethod->klass == mono_defaults.math_class) {
                if (strcmp (cmethod->name, "Min") == 0) {
                        if (is_unsigned_regsize_type (fsig->params [0])) {
                                MONO_INST_NEW (cfg, ins, OP_MIN);
                                ins->inst_i0 = args [0];
                                ins->inst_i1 = args [1];
                                return ins;
                        }
                } else if (strcmp (cmethod->name, "Max") == 0) {
                        if (is_unsigned_regsize_type (fsig->params [0])) {
                                MONO_INST_NEW (cfg, ins, OP_MAX);
                                ins->inst_i0 = args [0];
                                ins->inst_i1 = args [1];
                                return ins;
                        }
                }
        } else if (cmethod->klass->image == mono_defaults.corlib) {
                if (cmethod->name [0] == 'B' && strcmp (cmethod->name, "Break") == 0
                                && strcmp (cmethod->klass->name, "Debugger") == 0) {
                        MONO_INST_NEW (cfg, ins, OP_BREAK);
                        return ins;
                }
                if (cmethod->name [0] == 'g' && strcmp (cmethod->name, "get_IsRunningOnWindows") == 0
                                && strcmp (cmethod->klass->name, "Environment") == 0) {
#ifdef PLATFORM_WIN32
                        NEW_ICONST (cfg, ins, 1);
#else
                        NEW_ICONST (cfg, ins, 0);
#endif
                        return ins;
                }
        }

        return mono_arch_get_inst_for_method (cfg, cmethod, fsig, args);
}

static void
mono_save_args (MonoCompile *cfg, MonoBasicBlock *bblock, MonoMethodSignature *sig, MonoInst **sp, MonoInst **args)
{
        MonoInst *store, *temp;
        int i;

        g_assert (!MONO_TYPE_ISSTRUCT (sig->ret));

        if (!sig->hasthis && sig->param_count == 0) 
                return;

        if (sig->hasthis) {
                if (sp [0]->opcode == OP_ICONST) {
                        *args++ = sp [0];
                } else {
                        temp = mono_compile_create_var (cfg, type_from_stack_type (*sp), OP_LOCAL);
                        *args++ = temp;
                        NEW_TEMPSTORE (cfg, store, temp->inst_c0, *sp);
                        store->cil_code = sp [0]->cil_code;
                        MONO_ADD_INS (bblock, store);
                }
                sp++;
        }

        for (i = 0; i < sig->param_count; ++i) {
                if (sp [0]->opcode == OP_ICONST) {
                        *args++ = sp [0];
                } else {
                        temp = mono_compile_create_var (cfg, sig->params [i], OP_LOCAL);
                        *args++ = temp;
                        NEW_TEMPSTORE (cfg, store, temp->inst_c0, *sp);
                        store->cil_code = sp [0]->cil_code;
                        if (store->opcode == CEE_STOBJ) {
                                NEW_TEMPLOADA (cfg, store, temp->inst_c0);
                                handle_stobj (cfg, bblock, store, *sp, sp [0]->cil_code, temp->klass, FALSE, FALSE, FALSE);
                        } else {
                                MONO_ADD_INS (bblock, store);
                        } 
                }
                sp++;
        }
}
#define MONO_INLINE_CALLED_LIMITED_METHODS 0
#define MONO_INLINE_CALLER_LIMITED_METHODS 0

#if (MONO_INLINE_CALLED_LIMITED_METHODS)
static char*
mono_inline_called_method_name_limit = NULL;
static gboolean check_inline_called_method_name_limit (MonoMethod *called_method) {
        char *called_method_name = mono_method_full_name (called_method, TRUE);
        int strncmp_result;
        
        if (mono_inline_called_method_name_limit == NULL) {
                char *limit_string = getenv ("MONO_INLINE_CALLED_METHOD_NAME_LIMIT");
                if (limit_string != NULL) {
                        mono_inline_called_method_name_limit = limit_string;
                } else {
                        mono_inline_called_method_name_limit = (char *) "";
                }
        }
        
        strncmp_result = strncmp (called_method_name, mono_inline_called_method_name_limit, strlen (mono_inline_called_method_name_limit));
        g_free (called_method_name);
        
        //return (strncmp_result <= 0);
        return (strncmp_result == 0);
}
#endif

#if (MONO_INLINE_CALLER_LIMITED_METHODS)
static char*
mono_inline_caller_method_name_limit = NULL;
static gboolean check_inline_caller_method_name_limit (MonoMethod *caller_method) {
        char *caller_method_name = mono_method_full_name (caller_method, TRUE);
        int strncmp_result;
        
        if (mono_inline_caller_method_name_limit == NULL) {
                char *limit_string = getenv ("MONO_INLINE_CALLER_METHOD_NAME_LIMIT");
                if (limit_string != NULL) {
                        mono_inline_caller_method_name_limit = limit_string;
                } else {
                        mono_inline_caller_method_name_limit = (char *) "";
                }
        }
        
        strncmp_result = strncmp (caller_method_name, mono_inline_caller_method_name_limit, strlen (mono_inline_caller_method_name_limit));
        g_free (caller_method_name);
        
        //return (strncmp_result <= 0);
        return (strncmp_result == 0);
}
#endif

static int
inline_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig, MonoBasicBlock *bblock, MonoInst **sp,
                guchar *ip, guint real_offset, GList *dont_inline, MonoBasicBlock **last_b, gboolean inline_allways)
{
        MonoInst *ins, *rvar = NULL;
        MonoMethodHeader *cheader;
        MonoBasicBlock *ebblock, *sbblock;
        int i, costs, new_locals_offset;
        MonoMethod *prev_inlined_method;
        MonoBasicBlock **prev_cil_offset_to_bb;
        unsigned char* prev_cil_start;
        guint32 prev_cil_offset_to_bb_len;

        g_assert (cfg->exception_type == MONO_EXCEPTION_NONE);

#if (MONO_INLINE_CALLED_LIMITED_METHODS)
        if ((! inline_allways) && ! check_inline_called_method_name_limit (cmethod))
                return 0;
#endif
#if (MONO_INLINE_CALLER_LIMITED_METHODS)
        if ((! inline_allways) && ! check_inline_caller_method_name_limit (cfg->method))
                return 0;
#endif

        if (bblock->out_of_line && !inline_allways)
                return 0;

        if (cfg->verbose_level > 2)
                g_print ("INLINE START %p %s -> %s\n", cmethod,  mono_method_full_name (cfg->method, TRUE), mono_method_full_name (cmethod, TRUE));

        if (!cmethod->inline_info) {
                mono_jit_stats.inlineable_methods++;
                cmethod->inline_info = 1;
        }
        /* allocate space to store the return value */
        if (!MONO_TYPE_IS_VOID (fsig->ret)) {
                rvar =  mono_compile_create_var (cfg, fsig->ret, OP_LOCAL);
        }

        /* allocate local variables */
        cheader = mono_method_get_header (cmethod);
        new_locals_offset = cfg->num_varinfo;
        for (i = 0; i < cheader->num_locals; ++i)
                mono_compile_create_var (cfg, cheader->locals [i], OP_LOCAL);
        
        /* allocate starte and end blocks */
        sbblock = NEW_BBLOCK (cfg);
        sbblock->block_num = cfg->num_bblocks++;
        sbblock->real_offset = real_offset;

        ebblock = NEW_BBLOCK (cfg);
        ebblock->block_num = cfg->num_bblocks++;
        ebblock->real_offset = real_offset;

        prev_inlined_method = cfg->inlined_method;
        cfg->inlined_method = cmethod;
        prev_cil_offset_to_bb = cfg->cil_offset_to_bb;
        prev_cil_offset_to_bb_len = cfg->cil_offset_to_bb_len;
        prev_cil_start = cfg->cil_start;

        costs = mono_method_to_ir (cfg, cmethod, sbblock, ebblock, new_locals_offset, rvar, dont_inline, sp, real_offset, *ip == CEE_CALLVIRT);

        cfg->inlined_method = prev_inlined_method;
        cfg->cil_offset_to_bb = prev_cil_offset_to_bb;
        cfg->cil_offset_to_bb_len = prev_cil_offset_to_bb_len;
        cfg->cil_start = prev_cil_start;

        if ((costs >= 0 && costs < 60) || inline_allways) {
                if (cfg->verbose_level > 2)
                        g_print ("INLINE END %s -> %s\n", mono_method_full_name (cfg->method, TRUE), mono_method_full_name (cmethod, TRUE));
                
                mono_jit_stats.inlined_methods++;

                /* always add some code to avoid block split failures */
                MONO_INST_NEW (cfg, ins, OP_NOP);
                MONO_ADD_INS (bblock, ins);
                ins->cil_code = ip;

                bblock->next_bb = sbblock;
                link_bblock (cfg, bblock, sbblock);

                if (rvar) {
                        NEW_TEMPLOAD (cfg, ins, rvar->inst_c0);
                        *sp++ = ins;
                }
                *last_b = ebblock;
                return costs + 1;
        } else {
                if (cfg->verbose_level > 2)
                        g_print ("INLINE ABORTED %s\n", mono_method_full_name (cmethod, TRUE));
                cfg->exception_type = MONO_EXCEPTION_NONE;
        }
        return 0;
}

/*
 * Some of these comments may well be out-of-date.
 * Design decisions: we do a single pass over the IL code (and we do bblock 
 * splitting/merging in the few cases when it's required: a back jump to an IL
 * address that was not already seen as bblock starting point).
 * Code is validated as we go (full verification is still better left to metadata/verify.c).
 * Complex operations are decomposed in simpler ones right away. We need to let the 
 * arch-specific code peek and poke inside this process somehow (except when the 
 * optimizations can take advantage of the full semantic info of coarse opcodes).
 * All the opcodes of the form opcode.s are 'normalized' to opcode.
 * MonoInst->opcode initially is the IL opcode or some simplification of that 
 * (OP_LOAD, OP_STORE). The arch-specific code may rearrange it to an arch-specific 
 * opcode with value bigger than OP_LAST.
 * At this point the IR can be handed over to an interpreter, a dumb code generator
 * or to the optimizing code generator that will translate it to SSA form.
 *
 * Profiling directed optimizations.
 * We may compile by default with few or no optimizations and instrument the code
 * or the user may indicate what methods to optimize the most either in a config file
 * or through repeated runs where the compiler applies offline the optimizations to 
 * each method and then decides if it was worth it.
 *
 */

#define CHECK_TYPE(ins) if (!(ins)->type) UNVERIFIED
#define CHECK_STACK(num) if ((sp - stack_start) < (num)) UNVERIFIED
#define CHECK_STACK_OVF(num) if (((sp - stack_start) + (num)) > header->max_stack) UNVERIFIED
#define CHECK_ARG(num) if ((unsigned)(num) >= (unsigned)num_args) UNVERIFIED
#define CHECK_LOCAL(num) if ((unsigned)(num) >= (unsigned)header->num_locals) UNVERIFIED
#define CHECK_OPSIZE(size) if (ip + size > end) UNVERIFIED
#define CHECK_UNVERIFIABLE(cfg) if (cfg->unverifiable) UNVERIFIED
#define CHECK_TYPELOAD(klass) if (!(klass) || (klass)->exception_type) {cfg->exception_ptr = klass; goto load_error;}

/* offset from br.s -> br like opcodes */
#define BIG_BRANCH_OFFSET 13

static inline gboolean
ip_in_bb (MonoCompile *cfg, MonoBasicBlock *bb, const guint8* ip)
{
        MonoBasicBlock *b = cfg->cil_offset_to_bb [ip - cfg->cil_start];
        
        return b == NULL || b == bb;
}

static int
get_basic_blocks (MonoCompile *cfg, MonoMethodHeader* header, guint real_offset, unsigned char *start, unsigned char *end, unsigned char **pos)
{
        unsigned char *ip = start;
        unsigned char *target;
        int i;
        guint cli_addr;
        MonoBasicBlock *bblock;
        const MonoOpcode *opcode;

        while (ip < end) {
                cli_addr = ip - start;
                i = mono_opcode_value ((const guint8 **)&ip, end);
                if (i < 0)
                        UNVERIFIED;
                opcode = &mono_opcodes [i];
                switch (opcode->argument) {
                case MonoInlineNone:
                        ip++; 
                        break;
                case MonoInlineString:
                case MonoInlineType:
                case MonoInlineField:
                case MonoInlineMethod:
                case MonoInlineTok:
                case MonoInlineSig:
                case MonoShortInlineR:
                case MonoInlineI:
                        ip += 5;
                        break;
                case MonoInlineVar:
                        ip += 3;
                        break;
                case MonoShortInlineVar:
                case MonoShortInlineI:
                        ip += 2;
                        break;
                case MonoShortInlineBrTarget:
                        target = start + cli_addr + 2 + (signed char)ip [1];
                        GET_BBLOCK (cfg, bblock, target);
                        ip += 2;
                        if (ip < end)
                                GET_BBLOCK (cfg, bblock, ip);
                        break;
                case MonoInlineBrTarget:
                        target = start + cli_addr + 5 + (gint32)read32 (ip + 1);
                        GET_BBLOCK (cfg, bblock, target);
                        ip += 5;
                        if (ip < end)
                                GET_BBLOCK (cfg, bblock, ip);
                        break;
                case MonoInlineSwitch: {
                        guint32 n = read32 (ip + 1);
                        guint32 j;
                        ip += 5;
                        cli_addr += 5 + 4 * n;
                        target = start + cli_addr;
                        GET_BBLOCK (cfg, bblock, target);
                        
                        for (j = 0; j < n; ++j) {
                                target = start + cli_addr + (gint32)read32 (ip);
                                GET_BBLOCK (cfg, bblock, target);
                                ip += 4;
                        }
                        break;
                }
                case MonoInlineR:
                case MonoInlineI8:
                        ip += 9;
                        break;
                default:
                        g_assert_not_reached ();
                }

                if (i == CEE_THROW) {
                        unsigned char *bb_start = ip - 1;
                        
                        /* Find the start of the bblock containing the throw */
                        bblock = NULL;
                        while ((bb_start >= start) && !bblock) {
                                bblock = cfg->cil_offset_to_bb [(bb_start) - start];
                                bb_start --;
                        }
                        if (bblock)
                                bblock->out_of_line = 1;
                }
        }
        return 0;
unverified:
        *pos = ip;
        return 1;
}

static MonoInst*
emit_tree (MonoCompile *cfg, MonoBasicBlock *bblock, MonoInst *ins, const guint8* ip_next)
{
        MonoInst *store, *temp, *load;
        
        if (ip_in_bb (cfg, bblock, ip_next) &&
                (CODE_IS_STLOC (ip_next) || *ip_next == CEE_RET))
                        return ins;
        
        temp = mono_compile_create_var (cfg, type_from_stack_type (ins), OP_LOCAL);
        temp->flags |= MONO_INST_IS_TEMP;
        NEW_TEMPSTORE (cfg, store, temp->inst_c0, ins);
        store->cil_code = ins->cil_code;
        MONO_ADD_INS (bblock, store);
        NEW_TEMPLOAD (cfg, load, temp->inst_c0);
        load->cil_code = ins->cil_code;
        return load;
}

static inline MonoMethod *
mini_get_method (MonoMethod *m, guint32 token, MonoClass *klass, MonoGenericContext *context)
{
        MonoMethod *method;

        if (m->wrapper_type != MONO_WRAPPER_NONE)
                return mono_method_get_wrapper_data (m, token);

        method = mono_get_method_full (m->klass->image, token, klass, context);

        return method;
}

static inline MonoClass*
mini_get_class (MonoMethod *method, guint32 token, MonoGenericContext *context)
{
        MonoClass *klass;

        if (method->wrapper_type != MONO_WRAPPER_NONE)
                klass = mono_method_get_wrapper_data (method, token);
        else
                klass = mono_class_get_full (method->klass->image, token, context);
        if (klass)
                mono_class_init (klass);
        return klass;
}

/*
 * Returns TRUE if the JIT should abort inlining because "callee"
 * is influenced by security attributes.
 */
static
gboolean check_linkdemand (MonoCompile *cfg, MonoMethod *caller, MonoMethod *callee, MonoBasicBlock *bblock, unsigned char *ip)
{
        guint32 result;
        
        if ((cfg->method != caller) && mono_method_has_declsec (callee)) {
                return TRUE;
        }
        
        result = mono_declsec_linkdemand (cfg->domain, caller, callee);
        if (result == MONO_JIT_SECURITY_OK)
                return FALSE;

        if (result == MONO_JIT_LINKDEMAND_ECMA) {
                /* Generate code to throw a SecurityException before the actual call/link */
                MonoAssembly *assembly = mono_image_get_assembly (caller->klass->image);
                MonoReflectionAssembly *refass = (MonoReflectionAssembly*) mono_assembly_get_object (cfg->domain, assembly);
                MonoReflectionMethod *refmet = mono_method_get_object (cfg->domain, caller, NULL);
                MonoSecurityManager *secman = mono_security_manager_get_methods ();
                MonoInst *args [3];

                NEW_ICONST (cfg, args [0], 4);
                NEW_PCONST (cfg, args [1], refass);
                NEW_PCONST (cfg, args [2], refmet);
                mono_emit_method_call_spilled (cfg, bblock, secman->linkdemandsecurityexception, mono_method_signature (secman->linkdemandsecurityexception), args, ip, NULL);
        } else if (cfg->exception_type == MONO_EXCEPTION_NONE) {
                 /* don't hide previous results */
                cfg->exception_type = MONO_EXCEPTION_SECURITY_LINKDEMAND;
                cfg->exception_data = result;
                return TRUE;
        }
        
        return FALSE;
}

static MonoMethod*
method_access_exception (void)
{
        static MonoMethod *method = NULL;

        if (!method) {
                MonoSecurityManager *secman = mono_security_manager_get_methods ();
                method = mono_class_get_method_from_name (secman->securitymanager,
                                                          "MethodAccessException", 2);
        }
        g_assert (method);
        return method;
}

static void
emit_throw_method_access_exception (MonoCompile *cfg, MonoMethod *caller, MonoMethod *callee,
                                    MonoBasicBlock *bblock, unsigned char *ip)
{
        MonoMethod *thrower = method_access_exception ();
        MonoInst *args [2];

        NEW_METHODCONST (cfg, args [0], caller);
        NEW_METHODCONST (cfg, args [1], callee);
        mono_emit_method_call_spilled (cfg, bblock, thrower,
                mono_method_signature (thrower), args, ip, NULL);
}

static MonoMethod*
verification_exception (void)
{
        static MonoMethod *method = NULL;

        if (!method) {
                MonoSecurityManager *secman = mono_security_manager_get_methods ();
                method = mono_class_get_method_from_name (secman->securitymanager,
                                                          "VerificationException", 0);
        }
        g_assert (method);
        return method;
}

static void
emit_throw_verification_exception (MonoCompile *cfg, MonoBasicBlock *bblock, unsigned char *ip)
{
        MonoMethod *thrower = verification_exception ();

        mono_emit_method_call_spilled (cfg, bblock, thrower,
                mono_method_signature (thrower),
                NULL, ip, NULL);
}

static void
ensure_method_is_allowed_to_call_method (MonoCompile *cfg, MonoMethod *caller, MonoMethod *callee,
                                         MonoBasicBlock *bblock, unsigned char *ip)
{
        MonoSecurityCoreCLRLevel caller_level = mono_security_core_clr_method_level (caller, TRUE);
        MonoSecurityCoreCLRLevel callee_level = mono_security_core_clr_method_level (callee, TRUE);
        gboolean is_safe = TRUE;

        if (!(caller_level >= callee_level ||
                        caller_level == MONO_SECURITY_CORE_CLR_SAFE_CRITICAL ||
                        callee_level == MONO_SECURITY_CORE_CLR_SAFE_CRITICAL)) {
                is_safe = FALSE;
        }

        if (!is_safe)
                emit_throw_method_access_exception (cfg, caller, callee, bblock, ip);
}

static gboolean
method_is_safe (MonoMethod *method)
{
        /*
        if (strcmp (method->name, "unsafeMethod") == 0)
                return FALSE;
        */
        return TRUE;
}

/*
 * Check that the IL instructions at ip are the array initialization
 * sequence and return the pointer to the data and the size.
 */
static const char*
initialize_array_data (MonoMethod *method, gboolean aot, unsigned char *ip, MonoInst *newarr, int *out_size)
{
        /*
         * newarr[System.Int32]
         * dup
         * ldtoken field valuetype ...
         * call void class [mscorlib]System.Runtime.CompilerServices.RuntimeHelpers::InitializeArray(class [mscorlib]System.Array, valuetype [mscorlib]System.RuntimeFieldHandle)
         */
        if (ip [0] == CEE_DUP && ip [1] == CEE_LDTOKEN && ip [5] == 0x4 && ip [6] == CEE_CALL) {
                MonoClass *klass = newarr->inst_newa_class;
                guint32 token = read32 (ip + 7);
                guint32 rva, field_index;
                const char *data_ptr;
                int size = 0;
                MonoMethod *cmethod;

                if (newarr->inst_newa_len->opcode != OP_ICONST)
                        return NULL;
                cmethod = mini_get_method (method, token, NULL, NULL);
                if (!cmethod)
                        return NULL;
                if (strcmp (cmethod->name, "InitializeArray") || strcmp (cmethod->klass->name, "RuntimeHelpers") || cmethod->klass->image != mono_defaults.corlib)
                        return NULL;
                switch (mono_type_get_underlying_type (&klass->byval_arg)->type) {
                case MONO_TYPE_BOOLEAN:
                case MONO_TYPE_I1:
                case MONO_TYPE_U1:
                        size = 1; break;
                /* we need to swap on big endian, so punt. Should we handle R4 and R8 as well? */
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
                case MONO_TYPE_CHAR:
                case MONO_TYPE_I2:
                case MONO_TYPE_U2:
                        size = 2; break;
                case MONO_TYPE_I4:
                case MONO_TYPE_U4:
                case MONO_TYPE_R4:
                        size = 4; break;
                case MONO_TYPE_R8:
#ifdef ARM_FPU_FPA
                        return NULL; /* stupid ARM FP swapped format */
#endif
                case MONO_TYPE_I8:
                case MONO_TYPE_U8:
                        size = 8; break;
#endif
                default:
                        return NULL;
                }
                size *= newarr->inst_newa_len->inst_c0;
                *out_size = size;
                /*g_print ("optimized in %s: size: %d, numelems: %d\n", method->name, size, newarr->inst_newa_len->inst_c0);*/
                field_index = read32 (ip + 2) & 0xffffff;
                mono_metadata_field_info (method->klass->image, field_index - 1, NULL, &rva, NULL);
                data_ptr = mono_image_rva_map (method->klass->image, rva);
                /*g_print ("field: 0x%08x, rva: %d, rva_ptr: %p\n", read32 (ip + 2), rva, data_ptr);*/
                /* for aot code we do the lookup on load */
                if (aot && data_ptr)
                        return GUINT_TO_POINTER (rva);
                return data_ptr;
        }
        return NULL;
}

/*
 * mono_method_to_ir: translates IL into basic blocks containing trees
 */
static int
mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_bblock, MonoBasicBlock *end_bblock, 
                   int locals_offset, MonoInst *return_var, GList *dont_inline, MonoInst **inline_args, 
                   guint inline_offset, gboolean is_virtual_call)
{
        MonoInst *zero_int32, *zero_int64, *zero_ptr, *zero_obj, *zero_r8;
        MonoInst *ins, **sp, **stack_start;
        MonoBasicBlock *bblock, *tblock = NULL, *init_localsbb = NULL;
        MonoMethod *cmethod;
        MonoInst **arg_array;
        MonoMethodHeader *header;
        MonoImage *image;
        guint32 token, ins_flag;
        MonoClass *klass;
        MonoClass *constrained_call = NULL;
        unsigned char *ip, *end, *target, *err_pos;
        static double r8_0 = 0.0;
        MonoMethodSignature *sig;
        MonoGenericContext *generic_context = NULL;
        MonoGenericContainer *generic_container = NULL;
        MonoType **param_types;
        GList *bb_recheck = NULL, *tmp;
        int i, n, start_new_bblock, ialign;
        int num_calls = 0, inline_costs = 0;
        int breakpoint_id = 0;
        guint32 align;
        guint real_offset, num_args;
        MonoBoolean security, pinvoke;
        MonoSecurityManager* secman = NULL;
        MonoDeclSecurityActions actions;
        GSList *class_inits = NULL;
        gboolean dont_verify, dont_verify_stloc;

        /* serialization and xdomain stuff may need access to private fields and methods */
        dont_verify = method->klass->image->assembly->corlib_internal? TRUE: FALSE;
        dont_verify |= method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE;
        dont_verify |= method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH;
        dont_verify |= method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE; /* bug #77896 */
        dont_verify |= method->wrapper_type == MONO_WRAPPER_COMINTEROP;
        dont_verify |= method->wrapper_type == MONO_WRAPPER_COMINTEROP_INVOKE;

        /* turn off visibility checks for smcs */
        dont_verify |= mono_security_get_mode () == MONO_SECURITY_MODE_SMCS_HACK;

        /* still some type unsafety issues in marshal wrappers... (unknown is PtrToStructure) */
        dont_verify_stloc = method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE;
        dont_verify_stloc |= method->wrapper_type == MONO_WRAPPER_UNKNOWN;
        dont_verify_stloc |= method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED;

        /* Not turned on yet */
        cfg->dont_verify_stack_merge = TRUE;

        image = method->klass->image;
        header = mono_method_get_header (method);
        generic_container = method->generic_container;
        sig = mono_method_signature (method);
        num_args = sig->hasthis + sig->param_count;
        ip = (unsigned char*)header->code;
        cfg->cil_start = ip;
        end = ip + header->code_size;
        mono_jit_stats.cil_code_size += header->code_size;

        if (sig->is_inflated)
                generic_context = mono_method_get_context (method);
        else if (generic_container)
                generic_context = &generic_container->context;

        g_assert (!sig->has_type_parameters);

        if (cfg->method == method)
                real_offset = 0;
        else
                real_offset = inline_offset;

        cfg->cil_offset_to_bb = mono_mempool_alloc0 (cfg->mempool, sizeof (MonoBasicBlock*) * header->code_size);
        cfg->cil_offset_to_bb_len = header->code_size;

        if (cfg->verbose_level > 2)
                g_print ("method to IR %s\n", mono_method_full_name (method, TRUE));

        dont_inline = g_list_prepend (dont_inline, method);
        if (cfg->method == method) {

                if (cfg->prof_options & MONO_PROFILE_INS_COVERAGE)
                        cfg->coverage_info = mono_profiler_coverage_alloc (cfg->method, header->code_size);

                /* ENTRY BLOCK */
                cfg->bb_entry = start_bblock = NEW_BBLOCK (cfg);
                start_bblock->cil_code = NULL;
                start_bblock->cil_length = 0;
                start_bblock->block_num = cfg->num_bblocks++;

                /* EXIT BLOCK */
                cfg->bb_exit = end_bblock = NEW_BBLOCK (cfg);
                end_bblock->cil_code = NULL;
                end_bblock->cil_length = 0;
                end_bblock->block_num = cfg->num_bblocks++;
                g_assert (cfg->num_bblocks == 2);

                arg_array = alloca (sizeof (MonoInst *) * num_args);
                for (i = num_args - 1; i >= 0; i--)
                        arg_array [i] = cfg->varinfo [i];

                if (header->num_clauses) {
                        cfg->spvars = g_hash_table_new (NULL, NULL);
                        cfg->exvars = g_hash_table_new (NULL, NULL);
                }
                /* handle exception clauses */
                for (i = 0; i < header->num_clauses; ++i) {
                        MonoBasicBlock *try_bb;
                        MonoExceptionClause *clause = &header->clauses [i];
                        GET_BBLOCK (cfg, try_bb, ip + clause->try_offset);
                        try_bb->real_offset = clause->try_offset;
                        GET_BBLOCK (cfg, tblock, ip + clause->handler_offset);
                        tblock->real_offset = clause->handler_offset;
                        tblock->flags |= BB_EXCEPTION_HANDLER;

                        link_bblock (cfg, try_bb, tblock);

                        if (*(ip + clause->handler_offset) == CEE_POP)
                                tblock->flags |= BB_EXCEPTION_DEAD_OBJ;

                        if (clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY ||
                            clause->flags == MONO_EXCEPTION_CLAUSE_FILTER ||
                            clause->flags == MONO_EXCEPTION_CLAUSE_FAULT) {
                                MONO_INST_NEW (cfg, ins, OP_START_HANDLER);
                                MONO_ADD_INS (tblock, ins);

                                /* todo: is a fault block unsafe to optimize? */
                                if (clause->flags == MONO_EXCEPTION_CLAUSE_FAULT)
                                        tblock->flags |= BB_EXCEPTION_UNSAFE;
                        }


                        /*g_print ("clause try IL_%04x to IL_%04x handler %d at IL_%04x to IL_%04x\n", clause->try_offset, clause->try_offset + clause->try_len, clause->flags, clause->handler_offset, clause->handler_offset + clause->handler_len);
                          while (p < end) {
                          g_print ("%s", mono_disasm_code_one (NULL, method, p, &p));
                          }*/
                        /* catch and filter blocks get the exception object on the stack */
                        if (clause->flags == MONO_EXCEPTION_CLAUSE_NONE ||
                            clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
                                MonoInst *load, *dummy_use;

                                /* mostly like handle_stack_args (), but just sets the input args */
                                /* g_print ("handling clause at IL_%04x\n", clause->handler_offset); */
                                tblock->in_scount = 1;
                                tblock->in_stack = mono_mempool_alloc (cfg->mempool, sizeof (MonoInst*));
                                tblock->in_stack [0] = mono_create_exvar_for_offset (cfg, clause->handler_offset);
                                tblock->stack_state = mono_mempool_alloc (cfg->mempool, sizeof (MonoStackSlot));
                                tblock->stack_state [0].type = STACK_OBJ;
                                /* FIXME? */
                                tblock->stack_state [0].klass = mono_defaults.object_class;

                                /* 
                                 * Add a dummy use for the exvar so its liveness info will be
                                 * correct.
                                 */
                                NEW_TEMPLOAD (cfg, load, tblock->in_stack [0]->inst_c0);
                                NEW_DUMMY_USE (cfg, dummy_use, load);
                                MONO_ADD_INS (tblock, dummy_use);
                                
                                if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
                                        GET_BBLOCK (cfg, tblock, ip + clause->data.filter_offset);
                                        tblock->real_offset = clause->data.filter_offset;
                                        tblock->in_scount = 1;
                                        tblock->in_stack = mono_mempool_alloc (cfg->mempool, sizeof (MonoInst*));
                                        tblock->stack_state = mono_mempool_alloc (cfg->mempool, sizeof (MonoStackSlot));
                                        tblock->stack_state [0].type = STACK_OBJ;
                                        /* FIXME? */
                                        tblock->stack_state [0].klass = mono_defaults.object_class;

                                        /* The filter block shares the exvar with the handler block */
                                        tblock->in_stack [0] = mono_create_exvar_for_offset (cfg, clause->handler_offset);
                                        MONO_INST_NEW (cfg, ins, OP_START_HANDLER);
                                        MONO_ADD_INS (tblock, ins);
                                }
                        }
                }
        } else {
                arg_array = alloca (sizeof (MonoInst *) * num_args);
                mono_save_args (cfg, start_bblock, sig, inline_args, arg_array);
        }

        /* FIRST CODE BLOCK */
        bblock = NEW_BBLOCK (cfg);
        bblock->cil_code = ip;

        ADD_BBLOCK (cfg, bblock);

        if (cfg->method == method) {
                breakpoint_id = mono_debugger_method_has_breakpoint (method);
                if (breakpoint_id && (mono_debug_format != MONO_DEBUG_FORMAT_DEBUGGER)) {
                        MONO_INST_NEW (cfg, ins, OP_BREAK);
                        MONO_ADD_INS (bblock, ins);
                }
        }

        if (mono_security_get_mode () == MONO_SECURITY_MODE_CAS)
                secman = mono_security_manager_get_methods ();

        security = (secman && mono_method_has_declsec (method));
        /* at this point having security doesn't mean we have any code to generate */
        if (security && (cfg->method == method)) {
                /* Only Demand, NonCasDemand and DemandChoice requires code generation.
                 * And we do not want to enter the next section (with allocation) if we
                 * have nothing to generate */
                security = mono_declsec_get_demands (method, &actions);
        }

        /* we must Demand SecurityPermission.Unmanaged before P/Invoking */
        pinvoke = (secman && (method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE));
        if (pinvoke) {
                MonoMethod *wrapped = mono_marshal_method_from_wrapper (method);
                if (wrapped && (wrapped->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL)) {
                        MonoCustomAttrInfo* custom = mono_custom_attrs_from_method (wrapped);

                        /* unless the method or it's class has the [SuppressUnmanagedCodeSecurity] attribute */
                        if (custom && mono_custom_attrs_has_attr (custom, secman->suppressunmanagedcodesecurity)) {
                                pinvoke = FALSE;
                        }

                        if (pinvoke) {
                                custom = mono_custom_attrs_from_class (wrapped->klass);
                                if (custom && mono_custom_attrs_has_attr (custom, secman->suppressunmanagedcodesecurity)) {
                                        pinvoke = FALSE;
                                }
                        }
                } else {
                        /* not a P/Invoke after all */
                        pinvoke = FALSE;
                }
        }
        
        if ((header->init_locals || (cfg->method == method && (cfg->opt & MONO_OPT_SHARED))) || cfg->compile_aot || security || pinvoke) {
                /* we use a separate basic block for the initialization code */
                cfg->bb_init = init_localsbb = NEW_BBLOCK (cfg);
                init_localsbb->real_offset = real_offset;
                start_bblock->next_bb = init_localsbb;
                init_localsbb->next_bb = bblock;
                link_bblock (cfg, start_bblock, init_localsbb);
                link_bblock (cfg, init_localsbb, bblock);
                init_localsbb->block_num = cfg->num_bblocks++;
        } else {
                start_bblock->next_bb = bblock;
                link_bblock (cfg, start_bblock, bblock);
        }

        /* at this point we know, if security is TRUE, that some code needs to be generated */
        if (security && (cfg->method == method)) {
                MonoInst *args [2];

                mono_jit_stats.cas_demand_generation++;

                if (actions.demand.blob) {
                        /* Add code for SecurityAction.Demand */
                        NEW_DECLSECCONST (cfg, args[0], image, actions.demand);
                        NEW_ICONST (cfg, args [1], actions.demand.size);
                        /* Calls static void SecurityManager.InternalDemand (byte* permissions, int size); */
                        mono_emit_method_call_spilled (cfg, init_localsbb, secman->demand, mono_method_signature (secman->demand), args, ip, NULL);
                }
                if (actions.noncasdemand.blob) {
                        /* CLR 1.x uses a .noncasdemand (but 2.x doesn't) */
                        /* For Mono we re-route non-CAS Demand to Demand (as the managed code must deal with it anyway) */
                        NEW_DECLSECCONST (cfg, args[0], image, actions.noncasdemand);
                        NEW_ICONST (cfg, args [1], actions.noncasdemand.size);
                        /* Calls static void SecurityManager.InternalDemand (byte* permissions, int size); */
                        mono_emit_method_call_spilled (cfg, init_localsbb, secman->demand, mono_method_signature (secman->demand), args, ip, NULL);
                }
                if (actions.demandchoice.blob) {
                        /* New in 2.0, Demand must succeed for one of the permissions (i.e. not all) */
                        NEW_DECLSECCONST (cfg, args[0], image, actions.demandchoice);
                        NEW_ICONST (cfg, args [1], actions.demandchoice.size);
                        /* Calls static void SecurityManager.InternalDemandChoice (byte* permissions, int size); */
                        mono_emit_method_call_spilled (cfg, init_localsbb, secman->demandchoice, mono_method_signature (secman->demandchoice), args, ip, NULL);
                }
        }

        /* we must Demand SecurityPermission.Unmanaged before p/invoking */
        if (pinvoke) {
                mono_emit_method_call_spilled (cfg, init_localsbb, secman->demandunmanaged, mono_method_signature (secman->demandunmanaged), NULL, ip, NULL);
        }

        if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR) {
                if (method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE) {
                        MonoMethod *wrapped = mono_marshal_method_from_wrapper (method);
                        if (wrapped && (wrapped->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL)) {
                                if (!(method->klass && method->klass->image &&
                                                mono_security_core_clr_is_platform_image (method->klass->image))) {
                                        emit_throw_method_access_exception (cfg, method, wrapped, bblock, ip);
                                }
                        }
                }
                if (!method_is_safe (method))
                        emit_throw_verification_exception (cfg, bblock, ip);
        }

        if (get_basic_blocks (cfg, header, real_offset, ip, end, &err_pos)) {
                ip = err_pos;
                UNVERIFIED;
        }

        if (cfg->method == method)
                mono_debug_init_method (cfg, bblock, breakpoint_id);

        param_types = mono_mempool_alloc (cfg->mempool, sizeof (MonoType*) * num_args);
        if (sig->hasthis)
                param_types [0] = method->klass->valuetype?&method->klass->this_arg:&method->klass->byval_arg;
        for (n = 0; n < sig->param_count; ++n)
                param_types [n + sig->hasthis] = sig->params [n];
        for (n = 0; n < header->num_locals; ++n) {
                if (header->locals [n]->type == MONO_TYPE_VOID && !header->locals [n]->byref)
                        UNVERIFIED;
        }
        class_inits = NULL;

        /* do this somewhere outside - not here */
        NEW_ICONST (cfg, zero_int32, 0);
        NEW_ICONST (cfg, zero_int64, 0);
        zero_int64->type = STACK_I8;
        NEW_PCONST (cfg, zero_ptr, 0);
        NEW_PCONST (cfg, zero_obj, 0);
        zero_obj->type = STACK_OBJ;

        MONO_INST_NEW (cfg, zero_r8, OP_R8CONST);
        zero_r8->type = STACK_R8;
        zero_r8->inst_p0 = &r8_0;

        /* add a check for this != NULL to inlined methods */
        if (is_virtual_call) {
                MONO_INST_NEW (cfg, ins, OP_CHECK_THIS);
                NEW_ARGLOAD (cfg, ins->inst_left, 0);
                ins->cil_code = ip;
                MONO_ADD_INS (bblock, ins);
        }

        /* we use a spare stack slot in SWITCH and NEWOBJ and others */
        stack_start = sp = mono_mempool_alloc0 (cfg->mempool, sizeof (MonoInst*) * (header->max_stack + 1));

        ins_flag = 0;
        start_new_bblock = 0;
        while (ip < end) {

                if (cfg->method == method)
                        real_offset = ip - header->code;
                else
                        real_offset = inline_offset;

                if (start_new_bblock) {
                        bblock->cil_length = ip - bblock->cil_code;
                        if (start_new_bblock == 2) {
                                g_assert (ip == tblock->cil_code);
                        } else {
                                GET_BBLOCK (cfg, tblock, ip);
                        }
                        bblock->next_bb = tblock;
                        bblock = tblock;
                        start_new_bblock = 0;
                        for (i = 0; i < bblock->in_scount; ++i) {
                                if (cfg->verbose_level > 3)
                                        g_print ("loading %d from temp %d\n", i, (int)bblock->in_stack [i]->inst_c0);                                           
                                NEW_TEMPLOAD (cfg, ins, bblock->in_stack [i]->inst_c0);
                                *sp++ = ins;
                        }
                        g_slist_free (class_inits);
                        class_inits = NULL;
                } else {
                        if ((tblock = cfg->cil_offset_to_bb [ip - cfg->cil_start]) && (tblock != bblock)) {
                                link_bblock (cfg, bblock, tblock);
                                if (sp != stack_start) {
                                        handle_stack_args (cfg, bblock, stack_start, sp - stack_start);
                                        sp = stack_start;
                                        CHECK_UNVERIFIABLE (cfg);
                                }
                                bblock->next_bb = tblock;
                                bblock = tblock;
                                for (i = 0; i < bblock->in_scount; ++i) {
                                        if (cfg->verbose_level > 3)
                                                g_print ("loading %d from temp %d\n", i, (int)bblock->in_stack [i]->inst_c0);                                           
                                        NEW_TEMPLOAD (cfg, ins, bblock->in_stack [i]->inst_c0);
                                        *sp++ = ins;
                                }
                                g_slist_free (class_inits);
                                class_inits = NULL;
                        }
                }

                bblock->real_offset = real_offset;

                if ((cfg->method == method) && cfg->coverage_info) {
                        MonoInst *store, *one;
                        guint32 cil_offset = ip - header->code;
                        cfg->coverage_info->data [cil_offset].cil_code = ip;

                        /* TODO: Use an increment here */
                        NEW_ICONST (cfg, one, 1);
                        one->cil_code = ip;

                        NEW_PCONST (cfg, ins, &(cfg->coverage_info->data [cil_offset].count));
                        ins->cil_code = ip;

                        MONO_INST_NEW (cfg, store, CEE_STIND_I);
                        store->cil_code = ip;
                        store->inst_left = ins;
                        store->inst_right = one;

                        MONO_ADD_INS (bblock, store);
                }

                if (cfg->verbose_level > 3)
                        g_print ("converting (in B%d: stack: %d) %s", bblock->block_num, (int)(sp - stack_start), mono_disasm_code_one (NULL, method, ip, NULL));

                switch (*ip) {
                case CEE_NOP:
                        MONO_INST_NEW (cfg, ins, OP_NOP);
                        ins->cil_code = ip++;
                        MONO_ADD_INS (bblock, ins);
                        break;
                case CEE_BREAK:
                        MONO_INST_NEW (cfg, ins, OP_BREAK);
                        ins->cil_code = ip++;
                        MONO_ADD_INS (bblock, ins);
                        break;
                case CEE_LDARG_0:
                case CEE_LDARG_1:
                case CEE_LDARG_2:
                case CEE_LDARG_3:
                        CHECK_STACK_OVF (1);
                        n = (*ip)-CEE_LDARG_0;
                        CHECK_ARG (n);
                        NEW_ARGLOAD (cfg, ins, n);
                        LDARG_SOFT_FLOAT (cfg, ins, n, ip);
                        ins->cil_code = ip++;
                        *sp++ = ins;
                        break;
                case CEE_LDLOC_0:
                case CEE_LDLOC_1:
                case CEE_LDLOC_2:
                case CEE_LDLOC_3:
                        CHECK_STACK_OVF (1);
                        n = (*ip)-CEE_LDLOC_0;
                        CHECK_LOCAL (n);
                        NEW_LOCLOAD (cfg, ins, n);
                        LDLOC_SOFT_FLOAT (cfg, ins, n, ip);
                        ins->cil_code = ip++;
                        *sp++ = ins;
                        break;
                case CEE_STLOC_0:
                case CEE_STLOC_1:
                case CEE_STLOC_2:
                case CEE_STLOC_3:
                        CHECK_STACK (1);
                        n = (*ip)-CEE_STLOC_0;
                        CHECK_LOCAL (n);
                        --sp;
                        handle_loaded_temps (cfg, bblock, stack_start, sp);
                        NEW_LOCSTORE (cfg, ins, n, *sp);
                        ins->cil_code = ip;
                        if (!dont_verify_stloc && target_type_is_incompatible (cfg, header->locals [n], *sp))
                                UNVERIFIED;
                        STLOC_SOFT_FLOAT (cfg, ins, n, ip);
                        if (ins->opcode == CEE_STOBJ) {
                                NEW_LOCLOADA (cfg, ins, n);
                                handle_stobj (cfg, bblock, ins, *sp, ip, ins->klass, FALSE, FALSE, FALSE);
                        } else
                                MONO_ADD_INS (bblock, ins);
                        ++ip;
                        inline_costs += 1;
                        break;
                case CEE_LDARG_S:
                        CHECK_OPSIZE (2);
                        CHECK_STACK_OVF (1);
                        CHECK_ARG (ip [1]);
                        NEW_ARGLOAD (cfg, ins, ip [1]);
                        LDARG_SOFT_FLOAT (cfg, ins, ip [1], ip);
                        ins->cil_code = ip;
                        *sp++ = ins;
                        ip += 2;
                        break;
                case CEE_LDARGA_S:
                        CHECK_OPSIZE (2);
                        CHECK_STACK_OVF (1);
                        CHECK_ARG (ip [1]);
                        NEW_ARGLOADA (cfg, ins, ip [1]);
                        ins->cil_code = ip;
                        *sp++ = ins;
                        ip += 2;
                        break;
                case CEE_STARG_S:
                        CHECK_OPSIZE (2);
                        CHECK_STACK (1);
                        --sp;
                        CHECK_ARG (ip [1]);
                        NEW_ARGSTORE (cfg, ins, ip [1], *sp);
                        handle_loaded_temps (cfg, bblock, stack_start, sp);
                        ins->cil_code = ip;
                        if (!dont_verify_stloc && target_type_is_incompatible (cfg, param_types [ip [1]], *sp))
                                UNVERIFIED;
                        STARG_SOFT_FLOAT (cfg, ins, ip [1], ip);
                        if (ins->opcode == CEE_STOBJ) {
                                NEW_ARGLOADA (cfg, ins, ip [1]);
                                handle_stobj (cfg, bblock, ins, *sp, ip, ins->klass, FALSE, FALSE, FALSE);
                        } else
                                MONO_ADD_INS (bblock, ins);
                        ip += 2;
                        break;
                case CEE_LDLOC_S:
                        CHECK_OPSIZE (2);
                        CHECK_STACK_OVF (1);
                        CHECK_LOCAL (ip [1]);
                        NEW_LOCLOAD (cfg, ins, ip [1]);
                        LDLOC_SOFT_FLOAT (cfg, ins, ip [1], ip);
                        ins->cil_code = ip;
                        *sp++ = ins;
                        ip += 2;
                        break;
                case CEE_LDLOCA_S:
                        CHECK_OPSIZE (2);
                        CHECK_STACK_OVF (1);
                        CHECK_LOCAL (ip [1]);
                        NEW_LOCLOADA (cfg, ins, ip [1]);
                        ins->cil_code = ip;
                        *sp++ = ins;
                        ip += 2;
                        break;
                case CEE_STLOC_S:
                        CHECK_OPSIZE (2);
                        CHECK_STACK (1);
                        --sp;
                        handle_loaded_temps (cfg, bblock, stack_start, sp);
                        CHECK_LOCAL (ip [1]);
                        NEW_LOCSTORE (cfg, ins, ip [1], *sp);
                        ins->cil_code = ip;
                        if (!dont_verify_stloc && target_type_is_incompatible (cfg, header->locals [ip [1]], *sp))
                                UNVERIFIED;
                        STLOC_SOFT_FLOAT (cfg, ins, ip [1], ip);
                        if (ins->opcode == CEE_STOBJ) {
                                NEW_LOCLOADA (cfg, ins, ip [1]);
                                handle_stobj (cfg, bblock, ins, *sp, ip, ins->klass, FALSE, FALSE, FALSE);
                        } else
                                MONO_ADD_INS (bblock, ins);
                        ip += 2;
                        inline_costs += 1;
                        break;
                case CEE_LDNULL:
                        CHECK_STACK_OVF (1);
                        NEW_PCONST (cfg, ins, NULL);
                        ins->cil_code = ip;
                        ins->type = STACK_OBJ;
                        ++ip;
                        *sp++ = ins;
                        break;
                case CEE_LDC_I4_M1:
                        CHECK_STACK_OVF (1);
                        NEW_ICONST (cfg, ins, -1);
                        ins->cil_code = ip;
                        ++ip;
                        *sp++ = ins;
                        break;
                case CEE_LDC_I4_0:
                case CEE_LDC_I4_1:
                case CEE_LDC_I4_2:
                case CEE_LDC_I4_3:
                case CEE_LDC_I4_4:
                case CEE_LDC_I4_5:
                case CEE_LDC_I4_6:
                case CEE_LDC_I4_7:
                case CEE_LDC_I4_8:
                        CHECK_STACK_OVF (1);
                        NEW_ICONST (cfg, ins, (*ip) - CEE_LDC_I4_0);
                        ins->cil_code = ip;
                        ++ip;
                        *sp++ = ins;
                        break;
                case CEE_LDC_I4_S:
                        CHECK_OPSIZE (2);
                        CHECK_STACK_OVF (1);
                        ++ip;
                        NEW_ICONST (cfg, ins, *((signed char*)ip));
                        ins->cil_code = ip;
                        ++ip;
                        *sp++ = ins;
                        break;
                case CEE_LDC_I4:
                        CHECK_OPSIZE (5);
                        CHECK_STACK_OVF (1);
                        NEW_ICONST (cfg, ins, (gint32)read32 (ip + 1));
                        ins->cil_code = ip;
                        ip += 5;
                        *sp++ = ins;
                        break;
                case CEE_LDC_I8:
                        CHECK_OPSIZE (9);
                        CHECK_STACK_OVF (1);
                        MONO_INST_NEW (cfg, ins, OP_I8CONST);
                        ins->cil_code = ip;
                        ins->type = STACK_I8;
                        ++ip;
                        ins->inst_l = (gint64)read64 (ip);
                        ip += 8;
                        *sp++ = ins;
                        break;
                case CEE_LDC_R4: {
                        float *f;
                        /* we should really allocate this only late in the compilation process */
                        mono_domain_lock (cfg->domain);
                        f = mono_mempool_alloc (cfg->domain->mp, sizeof (float));
                        mono_domain_unlock (cfg->domain);
                        CHECK_OPSIZE (5);
                        CHECK_STACK_OVF (1);
                        MONO_INST_NEW (cfg, ins, OP_R4CONST);
                        ins->type = STACK_R8;
                        ++ip;
                        readr4 (ip, f);
                        ins->inst_p0 = f;

                        ip += 4;
                        *sp++ = ins;                    
                        break;
                }
                case CEE_LDC_R8: {
                        double *d;
                        mono_domain_lock (cfg->domain);
                        d = mono_mempool_alloc (cfg->domain->mp, sizeof (double));
                        mono_domain_unlock (cfg->domain);
                        CHECK_OPSIZE (9);
                        CHECK_STACK_OVF (1);
                        MONO_INST_NEW (cfg, ins, OP_R8CONST);
                        ins->type = STACK_R8;
                        ++ip;
                        readr8 (ip, d);
                        ins->inst_p0 = d;

                        ip += 8;
                        *sp++ = ins;                    
                        break;
                }
                case CEE_DUP: {
                        MonoInst *temp, *store;
                        CHECK_STACK (1);
                        CHECK_STACK_OVF (1);
                        sp--;
                        ins = *sp;
                
                        /* 
                         * small optimization: if the loaded value was from a local already,
                         * just load it twice.
                         */
                        if (ins->ssa_op == MONO_SSA_LOAD && 
                            (ins->inst_i0->opcode == OP_LOCAL || ins->inst_i0->opcode == OP_ARG)) {
                                sp++;
                                MONO_INST_NEW (cfg, temp, 0);
                                *temp = *ins;
                                temp->cil_code = ip;
                                *sp++ = temp;
                        } else {
                                temp = mono_compile_create_var (cfg, type_from_stack_type (ins), OP_LOCAL);
                                temp->flags |= MONO_INST_IS_TEMP;
                                temp->cil_code = ip;
                                NEW_TEMPSTORE (cfg, store, temp->inst_c0, ins);
                                store->cil_code = ip;
                                if (store->opcode == CEE_STOBJ) {
                                        NEW_TEMPLOADA (cfg, store, temp->inst_c0);
                                        handle_stobj (cfg, bblock, store, sp [0], sp [0]->cil_code, store->klass, TRUE, FALSE, FALSE);
                                } else {
                                        MONO_ADD_INS (bblock, store);
                                }
                                NEW_TEMPLOAD (cfg, ins, temp->inst_c0);
                                *sp++ = ins;
                                ins->cil_code = ip;
                                NEW_TEMPLOAD (cfg, ins, temp->inst_c0);
                                *sp++ = ins;
                                ins->cil_code = ip;
                        }
                        ++ip;
                        inline_costs += 2;
                        break;
                }
                case CEE_POP:
                        CHECK_STACK (1);
                        MONO_INST_NEW (cfg, ins, CEE_POP);
                        MONO_ADD_INS (bblock, ins);
                        ins->cil_code = ip++;
                        --sp;
                        ins->inst_i0 = *sp;
                        break;
                case CEE_JMP:
                        CHECK_OPSIZE (5);
                        if (stack_start != sp)
                                UNVERIFIED;
                        MONO_INST_NEW (cfg, ins, OP_JMP);
                        token = read32 (ip + 1);
                        /* FIXME: check the signature matches */
                        cmethod = mini_get_method (method, token, NULL, generic_context);

                        if (!cmethod)
                                goto load_error;

                        if (mono_security_get_mode () == MONO_SECURITY_MODE_CAS) {
                                if (check_linkdemand (cfg, method, cmethod, bblock, ip))
                                        INLINE_FAILURE;
                                CHECK_CFG_EXCEPTION;
                        }

                        ins->inst_p0 = cmethod;
                        MONO_ADD_INS (bblock, ins);
                        ip += 5;
                        start_new_bblock = 1;
                        break;
                case CEE_CALLI:
                case CEE_CALL:
                case CEE_CALLVIRT: {
                        MonoInst *addr = NULL;
                        MonoMethodSignature *fsig = NULL;
                        int temp, array_rank = 0;
                        int virtual = *ip == CEE_CALLVIRT;

                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);

                        if (*ip == CEE_CALLI) {
                                cmethod = NULL;
                                CHECK_STACK (1);
                                --sp;
                                addr = *sp;
                                if (method->wrapper_type != MONO_WRAPPER_NONE)
                                        fsig = (MonoMethodSignature *)mono_method_get_wrapper_data (method, token);
                                else
                                        fsig = mono_metadata_parse_signature (image, token);

                                n = fsig->param_count + fsig->hasthis;
                        } else {
                                MonoMethod *cil_method;
                                
                                if (method->wrapper_type != MONO_WRAPPER_NONE) {
                                        cmethod =  (MonoMethod *)mono_method_get_wrapper_data (method, token);
                                        cil_method = cmethod;
                                } else if (constrained_call) {
                                        cmethod = mono_get_method_constrained (image, token, constrained_call, generic_context, &cil_method);
                                        cil_method = cmethod;
                                } else {
                                        cmethod = mini_get_method (method, token, NULL, generic_context);
                                        cil_method = cmethod;
                                }

                                if (!cmethod)
                                        goto load_error;
                                if (!dont_verify && !cfg->skip_visibility && !mono_method_can_access_method (method, cil_method))
                                        UNVERIFIED;

                                if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR)
                                        ensure_method_is_allowed_to_call_method (cfg, method, cil_method, bblock, ip);

                                if (!virtual && (cmethod->flags & METHOD_ATTRIBUTE_ABSTRACT))
                                        /* MS.NET seems to silently convert this to a callvirt */
                                        virtual = 1;

                                if (!cmethod->klass->inited){
                                        if (!mono_class_init (cmethod->klass))
                                                goto load_error;
                                }

                                if (mono_method_signature (cmethod)->pinvoke) {
                                        MonoMethod *wrapper = mono_marshal_get_native_wrapper (cmethod);
                                        fsig = mono_method_signature (wrapper);
                                } else if (constrained_call) {
                                        fsig = mono_method_signature (cmethod);
                                } else {
                                        fsig = mono_method_get_signature_full (cmethod, image, token, generic_context);
                                }

                                mono_save_token_info (cfg, image, token, cmethod);

                                n = fsig->param_count + fsig->hasthis;

                                if (mono_security_get_mode () == MONO_SECURITY_MODE_CAS) {
                                        if (check_linkdemand (cfg, method, cmethod, bblock, ip))
                                                INLINE_FAILURE;
                                        CHECK_CFG_EXCEPTION;
                                }

                                if (cmethod->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL &&
                                    mini_class_is_system_array (cmethod->klass)) {
                                        array_rank = cmethod->klass->rank;
                                }

                                if (cmethod->string_ctor)
                                        g_assert_not_reached ();

                        }

                        if (cmethod && cmethod->klass->generic_container)
                                UNVERIFIED;

                        CHECK_STACK (n);

                        //g_assert (!virtual || fsig->hasthis);

                        sp -= n;

                        if (constrained_call) {
                                /*
                                 * We have the `constrained.' prefix opcode.
                                 */
                                if (constrained_call->valuetype && !cmethod->klass->valuetype) {
                                        MonoInst *load;
                                        /*
                                         * The type parameter is instantiated as a valuetype,
                                         * but that type doesn't override the method we're
                                         * calling, so we need to box `this'.
                                         * sp [0] is a pointer to the data: we need the value
                                         * in handle_box (), so load it here.
                                         */
                                        MONO_INST_NEW (cfg, load, mono_type_to_ldind (&constrained_call->byval_arg));
                                        type_to_eval_stack_type (&constrained_call->byval_arg, load);
                                        load->cil_code = ip;
                                        load->inst_left = sp [0];
                                        sp [0] = handle_box (cfg, bblock, load, ip, constrained_call);
                                } else if (!constrained_call->valuetype) {
                                        MonoInst *ins;

                                        /*
                                         * The type parameter is instantiated as a reference
                                         * type.  We have a managed pointer on the stack, so
                                         * we need to dereference it here.
                                         */

                                        MONO_INST_NEW (cfg, ins, CEE_LDIND_REF);
                                        ins->cil_code = ip;
                                        ins->inst_i0 = sp [0];
                                        ins->type = STACK_OBJ;
                                        ins->klass = mono_class_from_mono_type (&constrained_call->byval_arg);
                                        sp [0] = ins;
                                } else if (cmethod->klass->valuetype)
                                        virtual = 0;
                                constrained_call = NULL;
                        }

                        if (*ip != CEE_CALLI && check_call_signature (cfg, fsig, sp))
                                UNVERIFIED;

                        if (cmethod && virtual && 
                            (cmethod->flags & METHOD_ATTRIBUTE_VIRTUAL) && 
                            !((cmethod->flags & METHOD_ATTRIBUTE_FINAL) && 
                              cmethod->wrapper_type != MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK) &&
                            mono_method_signature (cmethod)->generic_param_count) {
                                MonoInst *this_temp, *this_arg_temp, *store;
                                MonoInst *iargs [4];

                                g_assert (mono_method_signature (cmethod)->is_inflated);
                                /* Prevent inlining of methods that contain indirect calls */
                                INLINE_FAILURE;

                                this_temp = mono_compile_create_var (cfg, type_from_stack_type (sp [0]), OP_LOCAL);
                                this_temp->cil_code = ip;
                                NEW_TEMPSTORE (cfg, store, this_temp->inst_c0, sp [0]);

                                store->cil_code = ip;
                                MONO_ADD_INS (bblock, store);

                                /* FIXME: This should be a managed pointer */
                                this_arg_temp = mono_compile_create_var (cfg, &mono_defaults.int_class->byval_arg, OP_LOCAL);
                                this_arg_temp->cil_code = ip;

                                /* Because of the PCONST below */
                                cfg->disable_aot = TRUE;
                                NEW_TEMPLOAD (cfg, iargs [0], this_temp->inst_c0);
                                NEW_METHODCONST (cfg, iargs [1], cmethod);
                                NEW_PCONST (cfg, iargs [2], mono_method_get_context (cmethod));
                                NEW_TEMPLOADA (cfg, iargs [3], this_arg_temp->inst_c0);
                                temp = mono_emit_jit_icall (cfg, bblock, mono_helper_compile_generic_method, iargs, ip);

                                NEW_TEMPLOAD (cfg, addr, temp);
                                NEW_TEMPLOAD (cfg, sp [0], this_arg_temp->inst_c0);

                                if ((temp = mono_emit_calli (cfg, bblock, fsig, sp, addr, ip)) != -1) {
                                        NEW_TEMPLOAD (cfg, *sp, temp);
                                        sp++;
                                }

                                ip += 5;
                                ins_flag = 0;
                                break;
                        }

                        if ((ins_flag & MONO_INST_TAILCALL) && cmethod && (*ip == CEE_CALL) &&
                                 (mono_metadata_signature_equal (mono_method_signature (method), mono_method_signature (cmethod)))) {
                                int i;

                                /* Prevent inlining of methods with tail calls (the call stack would be altered) */
                                INLINE_FAILURE;
                                /* FIXME: This assumes the two methods has the same number and type of arguments */
                                /*
                                 * We implement tail calls by storing the actual arguments into the 
                                 * argument variables, then emitting a OP_JMP. Since the actual arguments
                                 * can refer to the arg variables, we have to spill them.
                                 */
                                handle_loaded_temps (cfg, bblock, sp, sp + n);
                                for (i = 0; i < n; ++i) {
                                        /* Prevent argument from being register allocated */
                                        arg_array [i]->flags |= MONO_INST_VOLATILE;

                                        /* Check if argument is the same */
                                        /* 
                                         * FIXME: This loses liveness info, so it can only be done if the
                                         * argument is not register allocated.
                                         */
                                        NEW_ARGLOAD (cfg, ins, i);
                                        if ((ins->opcode == sp [i]->opcode) && (ins->inst_i0 == sp [i]->inst_i0))
                                                continue;

                                        NEW_ARGSTORE (cfg, ins, i, sp [i]);
                                        ins->cil_code = ip;
                                        if (ins->opcode == CEE_STOBJ) {
                                                NEW_ARGLOADA (cfg, ins, i);
                                                handle_stobj (cfg, bblock, ins, sp [i], sp [i]->cil_code, ins->klass, FALSE, FALSE, FALSE);
                                        }
                                        else
                                                MONO_ADD_INS (bblock, ins);
                                }
                                MONO_INST_NEW (cfg, ins, OP_JMP);
                                ins->cil_code = ip;
                                ins->inst_p0 = cmethod;
                                ins->inst_p1 = arg_array [0];
                                MONO_ADD_INS (bblock, ins);
                                link_bblock (cfg, bblock, end_bblock);                  
                                start_new_bblock = 1;
                                /* skip CEE_RET as well */
                                ip += 6;
                                ins_flag = 0;
                                break;
                        }
                        if (cmethod && (cfg->opt & MONO_OPT_INTRINS) && (ins = mini_get_inst_for_method (cfg, cmethod, fsig, sp))) {
                                ins->cil_code = ip;

                                if (MONO_TYPE_IS_VOID (fsig->ret)) {
                                        MONO_ADD_INS (bblock, ins);
                                } else {
                                        type_to_eval_stack_type (fsig->ret, ins);
                                        *sp = ins;
                                        sp++;
                                }

                                ip += 5;
                                ins_flag = 0;
                                break;
                        }

                        handle_loaded_temps (cfg, bblock, stack_start, sp);

                        if ((cfg->opt & MONO_OPT_INLINE) && cmethod &&
                            (!virtual || !(cmethod->flags & METHOD_ATTRIBUTE_VIRTUAL) || (cmethod->flags & METHOD_ATTRIBUTE_FINAL)) && 
                            mono_method_check_inlining (cfg, cmethod) &&
                                 !g_list_find (dont_inline, cmethod)) {
                                int costs;
                                MonoBasicBlock *ebblock;
                                gboolean allways = FALSE;

                                if ((cmethod->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
                                        (cmethod->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL)) {
                                        /* Prevent inlining of methods that call wrappers */
                                        INLINE_FAILURE;
                                        cmethod = mono_marshal_get_native_wrapper (cmethod);
                                        allways = TRUE;
                                }

                                if ((costs = inline_method (cfg, cmethod, fsig, bblock, sp, ip, real_offset, dont_inline, &ebblock, allways))) {
                                        ip += 5;
                                        real_offset += 5;

                                        GET_BBLOCK (cfg, bblock, ip);
                                        ebblock->next_bb = bblock;
                                        link_bblock (cfg, ebblock, bblock);

                                        if (!MONO_TYPE_IS_VOID (fsig->ret))
                                                sp++;

                                        /* indicates start of a new block, and triggers a load of all 
                                           stack arguments at bb boundarie */
                                        bblock = ebblock;

                                        inline_costs += costs;
                                        ins_flag = 0;
                                        break;
                                }
                        }
                        
                        inline_costs += 10 * num_calls++;

                        /* tail recursion elimination */
                        if ((cfg->opt & MONO_OPT_TAILC) && *ip == CEE_CALL && cmethod == method && ip [5] == CEE_RET) {
                                gboolean has_vtargs = FALSE;
                                int i;
                                
                                /* Prevent inlining of methods with tail calls (the call stack would be altered) */
                                INLINE_FAILURE;
                                /* keep it simple */
                                for (i =  fsig->param_count - 1; i >= 0; i--) {
                                        if (MONO_TYPE_ISSTRUCT (mono_method_signature (cmethod)->params [i])) 
                                                has_vtargs = TRUE;
                                }

                                if (!has_vtargs) {
                                        for (i = 0; i < n; ++i) {
                                                NEW_ARGSTORE (cfg, ins, i, sp [i]);
                                                ins->cil_code = ip;
                                                MONO_ADD_INS (bblock, ins);
                                        }
                                        MONO_INST_NEW (cfg, ins, OP_BR);
                                        ins->cil_code = ip;
                                        MONO_ADD_INS (bblock, ins);
                                        tblock = start_bblock->out_bb [0];
                                        link_bblock (cfg, bblock, tblock);
                                        ins->inst_target_bb = tblock;
                                        start_new_bblock = 1;

                                        /* skip the CEE_RET, too */
                                        if (ip_in_bb (cfg, bblock, ip + 5))
                                                ip += 6;
                                        else
                                                ip += 5;
                                        ins_flag = 0;
                                        break;
                                }
                        }

                        if (*ip == CEE_CALLI) {
                                /* Prevent inlining of methods with indirect calls */
                                INLINE_FAILURE;
                                if ((temp = mono_emit_calli (cfg, bblock, fsig, sp, addr, ip)) != -1) {
                                        NEW_TEMPLOAD (cfg, *sp, temp);
                                        sp++;
                                }                                       
                        } else if (array_rank) {
                                MonoInst *addr;

                                if (strcmp (cmethod->name, "Set") == 0) { /* array Set */ 
                                        if (sp [fsig->param_count]->type == STACK_OBJ) {
                                                MonoInst *iargs [2];
                                                MonoInst *array, *to_store, *store;

                                                handle_loaded_temps (cfg, bblock, stack_start, sp);
                                                
                                                array = mono_compile_create_var (cfg, type_from_stack_type (sp [0]), OP_LOCAL);
                                                NEW_TEMPSTORE (cfg, store, array->inst_c0, sp [0]);
                                                store->cil_code = ip;
                                                MONO_ADD_INS (bblock, store);
                                                NEW_TEMPLOAD (cfg, iargs [0], array->inst_c0);

                                                to_store = mono_compile_create_var (cfg, type_from_stack_type (sp [fsig->param_count]), OP_LOCAL);
                                                NEW_TEMPSTORE (cfg, store, to_store->inst_c0, sp [fsig->param_count]);
                                                store->cil_code = ip;
                                                MONO_ADD_INS (bblock, store);
                                                NEW_TEMPLOAD (cfg, iargs [1], to_store->inst_c0);

                                                /*
                                                 * We first save the args for the call so that the args are copied to the stack
                                                 * and a new instruction tree for them is created. If we don't do this,
                                                 * the same MonoInst is added to two different trees and this is not 
                                                 * allowed by burg.
                                                 */
                                                mono_emit_jit_icall (cfg, bblock, mono_helper_stelem_ref_check, iargs, ip);

                                                NEW_TEMPLOAD (cfg, sp [0], array->inst_c0);
                                                NEW_TEMPLOAD (cfg, sp [fsig->param_count], to_store->inst_c0);
                                        }

                                        addr = mini_get_ldelema_ins (cfg, bblock, cmethod, sp, ip, TRUE);
                                        NEW_INDSTORE (cfg, ins, addr, sp [fsig->param_count], fsig->params [fsig->param_count - 1]);
                                        ins->cil_code = ip;
                                        if (ins->opcode == CEE_STOBJ) {
                                                handle_stobj (cfg, bblock, addr, sp [fsig->param_count], ip, mono_class_from_mono_type (fsig->params [fsig->param_count-1]), FALSE, FALSE, TRUE);
                                        } else {
                                                MONO_ADD_INS (bblock, ins);
                                        }

                                } else if (strcmp (cmethod->name, "Get") == 0) { /* array Get */
                                        addr = mini_get_ldelema_ins (cfg, bblock, cmethod, sp, ip, FALSE);
                                        NEW_INDLOAD (cfg, ins, addr, fsig->ret);
                                        ins->cil_code = ip;

                                        *sp++ = ins;
                                } else if (strcmp (cmethod->name, "Address") == 0) { /* array Address */
                                        addr = mini_get_ldelema_ins (cfg, bblock, cmethod, sp, ip, FALSE);
                                        *sp++ = addr;
                                } else {
                                        g_assert_not_reached ();
                                }

                        } else {
                                /* Prevent inlining of methods which call other methods */
                                INLINE_FAILURE;
                                if (ip_in_bb (cfg, bblock, ip + 5) 
                                    && (!MONO_TYPE_ISSTRUCT (fsig->ret))
                                    && (!MONO_TYPE_IS_VOID (fsig->ret) || cmethod->string_ctor)
                                    && (CODE_IS_STLOC (ip + 5) || ip [5] == CEE_POP || ip [5] == CEE_RET)) {
                                        /* no need to spill */
                                        ins = (MonoInst*)mono_emit_method_call (cfg, bblock, cmethod, fsig, sp, ip, virtual ? sp [0] : NULL);
                                        *sp++ = ins;
                                } else {
                                        if ((temp = mono_emit_method_call_spilled (cfg, bblock, cmethod, fsig, sp, ip, virtual ? sp [0] : NULL)) != -1) {
                                                NEW_TEMPLOAD (cfg, *sp, temp);
                                                sp++;
                                        }
                                }
                        }

                        ip += 5;
                        ins_flag = 0;
                        break;
                }
                case CEE_RET:
                        if (cfg->method != method) {
                                /* return from inlined methode */
                                if (return_var) {
                                        MonoInst *store;
                                        CHECK_STACK (1);
                                        --sp;
                                        //g_assert (returnvar != -1);
                                        NEW_TEMPSTORE (cfg, store, return_var->inst_c0, *sp);
                                        store->cil_code = sp [0]->cil_code;
                                        if (store->opcode == CEE_STOBJ) {
                                                g_assert_not_reached ();
                                                NEW_TEMPLOADA (cfg, store, return_var->inst_c0);
                                                /* FIXME: it is possible some optimization will pass the a heap pointer for the struct address, so we'll need the write barrier */
                                                handle_stobj (cfg, bblock, store, *sp, sp [0]->cil_code, return_var->klass, FALSE, FALSE, FALSE);
                                        } else
                                                MONO_ADD_INS (bblock, store);
                                } 
                        } else {
                                if (cfg->ret) {
                                        g_assert (!return_var);
                                        CHECK_STACK (1);
                                        --sp;
                                        MONO_INST_NEW (cfg, ins, OP_NOP);
                                        ins->opcode = mono_type_to_stind (mono_method_signature (method)->ret);
                                        if (ins->opcode == CEE_STOBJ) {
                                                NEW_RETLOADA (cfg, ins);
                                                /* FIXME: it is possible some optimization will pass the a heap pointer for the struct address, so we'll need the write barrier */
                                                handle_stobj (cfg, bblock, ins, *sp, ip, ins->klass, FALSE, FALSE, FALSE);
                                        } else {
                                                ins->opcode = OP_SETRET;
                                                ins->cil_code = ip;
                                                ins->inst_i0 = *sp;;
                                                ins->inst_i1 = NULL;
                                                MONO_ADD_INS (bblock, ins);
                                        }
                                }
                        }
                        if (sp != stack_start)
                                UNVERIFIED;
                        MONO_INST_NEW (cfg, ins, OP_BR);
                        ins->cil_code = ip++;
                        ins->inst_target_bb = end_bblock;
                        MONO_ADD_INS (bblock, ins);
                        link_bblock (cfg, bblock, end_bblock);
                        start_new_bblock = 1;
                        break;
                case CEE_BR_S:
                        CHECK_OPSIZE (2);
                        MONO_INST_NEW (cfg, ins, OP_BR);
                        ins->cil_code = ip++;
                        MONO_ADD_INS (bblock, ins);
                        target = ip + 1 + (signed char)(*ip);
                        ++ip;
                        GET_BBLOCK (cfg, tblock, target);
                        link_bblock (cfg, bblock, tblock);
                        CHECK_BBLOCK (target, ip, tblock);
                        ins->inst_target_bb = tblock;
                        if (sp != stack_start) {
                                handle_stack_args (cfg, bblock, stack_start, sp - stack_start);
                                sp = stack_start;
                                CHECK_UNVERIFIABLE (cfg);
                        }
                        start_new_bblock = 1;
                        inline_costs += BRANCH_COST;
                        break;
                case CEE_BRFALSE_S:
                case CEE_BRTRUE_S:
                        CHECK_OPSIZE (2);
                        CHECK_STACK (1);
                        if (sp [-1]->type == STACK_VTYPE || sp [-1]->type == STACK_R8)
                                UNVERIFIED;
                        MONO_INST_NEW (cfg, ins, *ip + BIG_BRANCH_OFFSET);
                        ins->cil_code = ip++;
                        target = ip + 1 + *(signed char*)ip;
                        ip++;
                        ADD_UNCOND (ins->opcode == CEE_BRTRUE);
                        if (sp != stack_start) {
                                handle_stack_args (cfg, bblock, stack_start, sp - stack_start);
                                sp = stack_start;
                                CHECK_UNVERIFIABLE (cfg);
                        }
                        inline_costs += BRANCH_COST;
                        break;
                case CEE_BEQ_S:
                case CEE_BGE_S:
                case CEE_BGT_S:
                case CEE_BLE_S:
                case CEE_BLT_S:
                case CEE_BNE_UN_S:
                case CEE_BGE_UN_S:
                case CEE_BGT_UN_S:
                case CEE_BLE_UN_S:
                case CEE_BLT_UN_S:
                        CHECK_OPSIZE (2);
                        CHECK_STACK (2);
                        MONO_INST_NEW (cfg, ins, *ip + BIG_BRANCH_OFFSET);
                        ins->cil_code = ip++;
                        target = ip + 1 + *(signed char*)ip;
                        ip++;
#ifdef MONO_ARCH_SOFT_FLOAT
                        if (sp [-1]->type == STACK_R8 || sp [-2]->type == STACK_R8) {
                                ins->opcode = condbr_to_fp_br (ins->opcode);
                                sp -= 2;
                                ins->inst_left = sp [0];
                                ins->inst_right = sp [1];
                                ins->type = STACK_I4;
                                *sp++ = emit_tree (cfg, bblock, ins, ins->cil_code);
                                MONO_INST_NEW (cfg, ins, CEE_BRTRUE);
                                ADD_UNCOND (TRUE);
                        } else {
                                ADD_BINCOND (NULL);
                        }
#else
                        ADD_BINCOND (NULL);
#endif
                        if (sp != stack_start) {
                                handle_stack_args (cfg, bblock, stack_start, sp - stack_start);
                                sp = stack_start;
                                CHECK_UNVERIFIABLE (cfg);
                        }
                        inline_costs += BRANCH_COST;
                        break;
                case CEE_BR:
                        CHECK_OPSIZE (5);
                        MONO_INST_NEW (cfg, ins, OP_BR);
                        ins->cil_code = ip++;
                        MONO_ADD_INS (bblock, ins);
                        target = ip + 4 + (gint32)read32(ip);
                        ip += 4;
                        GET_BBLOCK (cfg, tblock, target);
                        link_bblock (cfg, bblock, tblock);
                        CHECK_BBLOCK (target, ip, tblock);
                        ins->inst_target_bb = tblock;
                        if (sp != stack_start) {
                                handle_stack_args (cfg, bblock, stack_start, sp - stack_start);
                                sp = stack_start;
                                CHECK_UNVERIFIABLE (cfg);
                        }
                        start_new_bblock = 1;
                        inline_costs += BRANCH_COST;
                        break;
                case CEE_BRFALSE:
                case CEE_BRTRUE:
                        CHECK_OPSIZE (5);
                        CHECK_STACK (1);
                        if (sp [-1]->type == STACK_VTYPE || sp [-1]->type == STACK_R8)
                                UNVERIFIED;
                        MONO_INST_NEW (cfg, ins, *ip);
                        ins->cil_code = ip++;
                        target = ip + 4 + (gint32)read32(ip);
                        ip += 4;
                        ADD_UNCOND(ins->opcode == CEE_BRTRUE);
                        if (sp != stack_start) {
                                handle_stack_args (cfg, bblock, stack_start, sp - stack_start);
                                sp = stack_start;
                                CHECK_UNVERIFIABLE (cfg);
                        }
                        inline_costs += BRANCH_COST;
                        break;
                case CEE_BEQ:
                case CEE_BGE:
                case CEE_BGT:
                case CEE_BLE:
                case CEE_BLT:
                case CEE_BNE_UN:
                case CEE_BGE_UN:
                case CEE_BGT_UN:
                case CEE_BLE_UN:
                case CEE_BLT_UN:
                        CHECK_OPSIZE (5);
                        CHECK_STACK (2);
                        MONO_INST_NEW (cfg, ins, *ip);
                        ins->cil_code = ip++;
                        target = ip + 4 + (gint32)read32(ip);
                        ip += 4;
#ifdef MONO_ARCH_SOFT_FLOAT
                        if (sp [-1]->type == STACK_R8 || sp [-2]->type == STACK_R8) {
                                ins->opcode = condbr_to_fp_br (ins->opcode);
                                sp -= 2;
                                ins->inst_left = sp [0];
                                ins->inst_right = sp [1];
                                ins->type = STACK_I4;
                                *sp++ = emit_tree (cfg, bblock, ins, ins->cil_code);
                                MONO_INST_NEW (cfg, ins, CEE_BRTRUE);
                                ADD_UNCOND (TRUE);
                        } else {
                                ADD_BINCOND (NULL);
                        }
#else
                        ADD_BINCOND (NULL);
#endif
                        if (sp != stack_start) {
                                handle_stack_args (cfg, bblock, stack_start, sp - stack_start);
                                sp = stack_start;
                                CHECK_UNVERIFIABLE (cfg);
                        }
                        inline_costs += BRANCH_COST;
                        break;
                case CEE_SWITCH:
                        CHECK_OPSIZE (5);
                        CHECK_STACK (1);
                        n = read32 (ip + 1);
                        MONO_INST_NEW (cfg, ins, *ip);
                        --sp;
                        ins->inst_left = *sp;
                        if ((ins->inst_left->type != STACK_I4) && (ins->inst_left->type != STACK_PTR)) 
                                UNVERIFIED;
                        ins->cil_code = ip;
                        ip += 5;
                        CHECK_OPSIZE (n * sizeof (guint32));
                        target = ip + n * sizeof (guint32);
                        MONO_ADD_INS (bblock, ins);
                        GET_BBLOCK (cfg, tblock, target);
                        link_bblock (cfg, bblock, tblock);
                        ins->klass = GUINT_TO_POINTER (n);
                        ins->inst_many_bb = mono_mempool_alloc (cfg->mempool, sizeof (MonoBasicBlock*) * (n + 1));
                        ins->inst_many_bb [n] = tblock;

                        for (i = 0; i < n; ++i) {
                                GET_BBLOCK (cfg, tblock, target + (gint32)read32(ip));
                                link_bblock (cfg, bblock, tblock);
                                ins->inst_many_bb [i] = tblock;
                                ip += 4;
                        }
                        if (sp != stack_start) {
                                handle_stack_args (cfg, bblock, stack_start, sp - stack_start);
                                sp = stack_start;
                                CHECK_UNVERIFIABLE (cfg);
                        }
                        /* Needed by the code generated in inssel.brg */
                        mono_get_got_var (cfg);
                        inline_costs += (BRANCH_COST * 2);
                        break;
                case CEE_LDIND_I1:
                case CEE_LDIND_U1:
                case CEE_LDIND_I2:
                case CEE_LDIND_U2:
                case CEE_LDIND_I4:
                case CEE_LDIND_U4:
                case CEE_LDIND_I8:
                case CEE_LDIND_I:
                case CEE_LDIND_R4:
                case CEE_LDIND_R8:
                case CEE_LDIND_REF:
                        CHECK_STACK (1);
                        MONO_INST_NEW (cfg, ins, *ip);
                        ins->cil_code = ip;
                        --sp;
                        ins->inst_i0 = *sp;
                        *sp++ = ins;
                        ins->type = ldind_type [*ip - CEE_LDIND_I1];
                        ins->flags |= ins_flag;
                        ins_flag = 0;
                        if (ins->type == STACK_OBJ)
                                ins->klass = mono_defaults.object_class;
#ifdef MONO_ARCH_SOFT_FLOAT
                        if (*ip == CEE_LDIND_R4) {
                                int temp;
                                --sp;
                                temp = handle_load_float (cfg, bblock, ins->inst_i0, ip);
                                NEW_TEMPLOAD (cfg, *sp, temp);
                                sp++;
                        }
#endif
                        ++ip;
                        break;
                case CEE_STIND_REF:
                case CEE_STIND_I1:
                case CEE_STIND_I2:
                case CEE_STIND_I4:
                case CEE_STIND_I8:
                case CEE_STIND_R4:
                case CEE_STIND_R8:
                        CHECK_STACK (2);
#ifdef MONO_ARCH_SOFT_FLOAT
                        if (*ip == CEE_STIND_R4) {
                                sp -= 2;
                                handle_store_float (cfg, bblock, sp [0], sp [1], ip);
                                ip++;
                                break;
                        }
#endif
#if HAVE_WRITE_BARRIERS
                        if (*ip == CEE_STIND_REF && method->wrapper_type != MONO_WRAPPER_WRITE_BARRIER) {
                                /* insert call to write barrier */
                                MonoMethod *write_barrier = mono_marshal_get_write_barrier ();
                                sp -= 2;
                                mono_emit_method_call_spilled (cfg, bblock, write_barrier, mono_method_signature (write_barrier), sp, ip, NULL);
                                ip++;
                                break;
                        }
#endif
                        MONO_INST_NEW (cfg, ins, *ip);
                        ins->cil_code = ip++;
                        sp -= 2;
                        handle_loaded_temps (cfg, bblock, stack_start, sp);
                        MONO_ADD_INS (bblock, ins);
                        ins->inst_i0 = sp [0];
                        ins->inst_i1 = sp [1];
                        ins->flags |= ins_flag;
                        ins_flag = 0;
                        inline_costs += 1;
                        break;
                case CEE_MUL:
                        CHECK_STACK (2);
                        ADD_BINOP (*ip);

#ifdef MONO_ARCH_NO_EMULATE_MUL_IMM
                        /* FIXME: This breaks with ssapre (mono -O=ssapre loader.exe) */
                        if ((ins->inst_right->opcode == OP_ICONST) && !(cfg->opt & MONO_OPT_SSAPRE)) {
                                switch (ins->opcode) {
                                case CEE_MUL:
                                        ins->opcode = OP_IMUL_IMM;
                                        ins->inst_imm = ins->inst_right->inst_c0;
                                        break;
                                case OP_LMUL:
                                        ins->opcode = OP_LMUL_IMM;
                                        ins->inst_imm = ins->inst_right->inst_c0;
                                        break;
                                default:
                                        g_assert_not_reached ();
                                }
                        }
#endif

                        if (mono_find_jit_opcode_emulation (ins->opcode)) {
                                --sp;
                                *sp++ = emit_tree (cfg, bblock, ins, ip + 1);
                        }
                        ip++;
                        break;
                case CEE_ADD:
                case CEE_SUB:
                case CEE_DIV:
                case CEE_DIV_UN:
                case CEE_REM:
                case CEE_REM_UN:
                case CEE_AND:
                case CEE_OR:
                case CEE_XOR:
                case CEE_SHL:
                case CEE_SHR:
                case CEE_SHR_UN:
                        CHECK_STACK (2);
                        ADD_BINOP (*ip);
                        /* special case that gives a nice speedup and happens to workaorund a ppc jit but (for the release)
                         * later apply the speedup to the left shift as well
                         * See BUG# 57957.
                         */
                        if ((ins->opcode == OP_LSHR_UN) && (ins->type == STACK_I8) 
                                        && (ins->inst_right->opcode == OP_ICONST) && (ins->inst_right->inst_c0 == 32)) {
                                ins->opcode = OP_LONG_SHRUN_32;
                                /*g_print ("applied long shr speedup to %s\n", cfg->method->name);*/
                                ip++;
                                break;
                        }
                        if (mono_find_jit_opcode_emulation (ins->opcode)) {
                                --sp;
                                *sp++ = emit_tree (cfg, bblock, ins, ip + 1);
                        }
                        ip++;
                        break;
                case CEE_NEG:
                case CEE_NOT:
                case CEE_CONV_I1:
                case CEE_CONV_I2:
                case CEE_CONV_I4:
                case CEE_CONV_R4:
                case CEE_CONV_R8:
                case CEE_CONV_U4:
                case CEE_CONV_I8:
                case CEE_CONV_U8:
                case CEE_CONV_OVF_I8:
                case CEE_CONV_OVF_U8:
                case CEE_CONV_R_UN:
                        CHECK_STACK (1);
                        ADD_UNOP (*ip);
                        if (mono_find_jit_opcode_emulation (ins->opcode)) {
                                --sp;
                                *sp++ = emit_tree (cfg, bblock, ins, ip + 1);
                        }
                        ip++;                   
                        break;
                case CEE_CONV_OVF_I4:
                case CEE_CONV_OVF_I1:
                case CEE_CONV_OVF_I2:
                case CEE_CONV_OVF_I:
                case CEE_CONV_OVF_U:
                        CHECK_STACK (1);

                        if (sp [-1]->type == STACK_R8) {
                                ADD_UNOP (CEE_CONV_OVF_I8);
                                ADD_UNOP (*ip);
                        } else {
                                ADD_UNOP (*ip);
                        }

                        ip++;
                        break;
                case CEE_CONV_OVF_U1:
                case CEE_CONV_OVF_U2:
                case CEE_CONV_OVF_U4:
                        CHECK_STACK (1);

                        if (sp [-1]->type == STACK_R8) {
                                ADD_UNOP (CEE_CONV_OVF_U8);
                                ADD_UNOP (*ip);
                        } else {
                                ADD_UNOP (*ip);
                        }

                        ip++;
                        break;
                case CEE_CONV_OVF_I1_UN:
                case CEE_CONV_OVF_I2_UN:
                case CEE_CONV_OVF_I4_UN:
                case CEE_CONV_OVF_I8_UN:
                case CEE_CONV_OVF_U1_UN:
                case CEE_CONV_OVF_U2_UN:
                case CEE_CONV_OVF_U4_UN:
                case CEE_CONV_OVF_U8_UN:
                case CEE_CONV_OVF_I_UN:
                case CEE_CONV_OVF_U_UN:
                        CHECK_STACK (1);
                        ADD_UNOP (*ip);
                        ip++;
                        break;
                case CEE_CPOBJ:
                        CHECK_OPSIZE (5);
                        CHECK_STACK (2);
                        token = read32 (ip + 1);
                        klass = mini_get_class (method, token, generic_context);
                        CHECK_TYPELOAD (klass);
                        sp -= 2;
                        if (MONO_TYPE_IS_REFERENCE (&klass->byval_arg)) {
                                MonoInst *store, *load;
                                MONO_INST_NEW (cfg, load, CEE_LDIND_REF);
                                load->cil_code = ip;
                                load->inst_i0 = sp [1];
                                load->type = STACK_OBJ;
                                load->klass = klass;
                                load->flags |= ins_flag;
                                MONO_INST_NEW (cfg, store, CEE_STIND_REF);
                                store->cil_code = ip;
                                handle_loaded_temps (cfg, bblock, stack_start, sp);
                                MONO_ADD_INS (bblock, store);
                                store->inst_i0 = sp [0];
                                store->inst_i1 = load;
                                store->flags |= ins_flag;
                        } else {
                                n = mono_class_value_size (klass, NULL);
                                if ((cfg->opt & MONO_OPT_INTRINS) && n <= sizeof (gpointer) * 5) {
                                        MonoInst *copy;
                                        MONO_INST_NEW (cfg, copy, OP_MEMCPY);
                                        copy->inst_left = sp [0];
                                        copy->inst_right = sp [1];
                                        copy->cil_code = ip;
                                        copy->backend.size = n;
                                        MONO_ADD_INS (bblock, copy);
                                } else {
                                        MonoMethod *memcpy_method = get_memcpy_method ();
                                        MonoInst *iargs [3];
                                        iargs [0] = sp [0];
                                        iargs [1] = sp [1];
                                        NEW_ICONST (cfg, iargs [2], n);
                                        iargs [2]->cil_code = ip;

                                        mono_emit_method_call_spilled (cfg, bblock, memcpy_method, memcpy_method->signature, iargs, ip, NULL);
                                }
                        }
                        ins_flag = 0;
                        ip += 5;
                        break;
                case CEE_LDOBJ: {
                        MonoInst *iargs [3];
                        int loc_index = -1;
                        int stloc_len = 0;
                        CHECK_OPSIZE (5);
                        CHECK_STACK (1);
                        --sp;
                        token = read32 (ip + 1);
                        klass = mini_get_class (method, token, generic_context);
                        CHECK_TYPELOAD (klass);
                        if (MONO_TYPE_IS_REFERENCE (&klass->byval_arg)) {
                                MONO_INST_NEW (cfg, ins, CEE_LDIND_REF);
                                ins->cil_code = ip;
                                ins->inst_i0 = sp [0];
                                ins->type = STACK_OBJ;
                                ins->klass = klass;
                                ins->flags |= ins_flag;
                                ins_flag = 0;
                                *sp++ = ins;
                                ip += 5;
                                break;
                        }

                        /* Optimize the common ldobj+stloc combination */
                        switch (ip [5]) {
                        case CEE_STLOC_S:
                                loc_index = ip [6];
                                stloc_len = 2;
                                break;
                        case CEE_STLOC_0:
                        case CEE_STLOC_1:
                        case CEE_STLOC_2:
                        case CEE_STLOC_3:
                                loc_index = ip [5] - CEE_STLOC_0;
                                stloc_len = 1;
                                break;
                        default:
                                break;
                        }

                        if ((loc_index != -1) && ip_in_bb (cfg, bblock, ip + 5)) {
                                CHECK_LOCAL (loc_index);
                                NEW_LOCSTORE (cfg, ins, loc_index, *sp);

                                if (ins->opcode == CEE_STOBJ) {
                                        handle_loaded_temps (cfg, bblock, stack_start, sp);
                                        ins->cil_code = ip;
                                        g_assert (ins->opcode == CEE_STOBJ);
                                        NEW_LOCLOADA (cfg, ins, loc_index);
                                        handle_stobj (cfg, bblock, ins, *sp, ip, ins->klass, FALSE, FALSE, FALSE);
                                        ip += 5;
                                        ip += stloc_len;
                                        break;
                                }
                        }

                        n = mono_class_value_size (klass, NULL);
                        ins = mono_compile_create_var (cfg, &klass->byval_arg, OP_LOCAL);
                        NEW_TEMPLOADA (cfg, iargs [0], ins->inst_c0);
                        if ((cfg->opt & MONO_OPT_INTRINS) && n <= sizeof (gpointer) * 5) {
                                MonoInst *copy;
                                MONO_INST_NEW (cfg, copy, OP_MEMCPY);
                                copy->inst_left = iargs [0];
                                copy->inst_right = *sp;
                                copy->cil_code = ip;
                                copy->backend.size = n;
                                MONO_ADD_INS (bblock, copy);
                        } else {
                                MonoMethod *memcpy_method = get_memcpy_method ();
                                iargs [1] = *sp;
                                NEW_ICONST (cfg, iargs [2], n);
                                iargs [2]->cil_code = ip;

                                mono_emit_method_call_spilled (cfg, bblock, memcpy_method, memcpy_method->signature, iargs, ip, NULL);
                        }
                        NEW_TEMPLOAD (cfg, *sp, ins->inst_c0);
                        ++sp;
                        ip += 5;
                        ins_flag = 0;
                        inline_costs += 1;
                        break;
                }
                case CEE_LDSTR:
                        CHECK_STACK_OVF (1);
                        CHECK_OPSIZE (5);
                        n = read32 (ip + 1);

                        if (method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD) {
                                /* FIXME: moving GC */
                                NEW_PCONST (cfg, ins, mono_method_get_wrapper_data (method, n));
                                ins->cil_code = ip;
                                ins->type = STACK_OBJ;
                                ins->klass = mono_defaults.string_class;
                                *sp = ins;
                        }
                        else if (method->wrapper_type != MONO_WRAPPER_NONE) {
                                int temp;
                                MonoInst *iargs [1];

                                NEW_PCONST (cfg, iargs [0], mono_method_get_wrapper_data (method, n));                          
                                temp = mono_emit_jit_icall (cfg, bblock, mono_string_new_wrapper, iargs, ip);
                                NEW_TEMPLOAD (cfg, *sp, temp);

                        } else {

                                if (cfg->opt & MONO_OPT_SHARED) {
                                        int temp;
                                        MonoInst *iargs [3];
                                        MonoInst* domain_var;
                                        
                                        if (cfg->compile_aot) {
                                                /* FIXME: bug when inlining methods from different assemblies (n is a token valid just in one). */
                                                cfg->ldstr_list = g_list_prepend (cfg->ldstr_list, GINT_TO_POINTER (n));
                                        }
                                        /* avoid depending on undefined C behavior in sequence points */
                                        domain_var = mono_get_domainvar (cfg);
                                        NEW_TEMPLOAD (cfg, iargs [0], domain_var->inst_c0);
                                        NEW_IMAGECONST (cfg, iargs [1], image);
                                        NEW_ICONST (cfg, iargs [2], mono_metadata_token_index (n));
                                        temp = mono_emit_jit_icall (cfg, bblock, mono_ldstr, iargs, ip);
                                        NEW_TEMPLOAD (cfg, *sp, temp);
                                        mono_ldstr (cfg->domain, image, mono_metadata_token_index (n));
                                } else {
                                        if (bblock->out_of_line) {
                                                MonoInst *iargs [2];
                                                int temp;

                                                if (cfg->compile_aot && cfg->method->klass->image == mono_defaults.corlib) {
                                                        /* 
                                                         * Avoid relocations by using a version of helper_ldstr
                                                         * specialized to mscorlib.
                                                         */
                                                        NEW_ICONST (cfg, iargs [0], mono_metadata_token_index (n));
                                                        temp = mono_emit_jit_icall (cfg, bblock, mono_helper_ldstr_mscorlib, iargs, ip);
                                                } else {
                                                        /* Avoid creating the string object */
                                                        NEW_IMAGECONST (cfg, iargs [0], image);
                                                        NEW_ICONST (cfg, iargs [1], mono_metadata_token_index (n));
                                                        temp = mono_emit_jit_icall (cfg, bblock, mono_helper_ldstr, iargs, ip);
                                                }
                                                NEW_TEMPLOAD (cfg, *sp, temp);
                                        } 
                                        else
                                        if (cfg->compile_aot) {
                                                NEW_LDSTRCONST (cfg, ins, image, n);
                                                *sp = ins;
                                        } 
                                        else {
                                                NEW_PCONST (cfg, ins, NULL);
                                                ins->cil_code = ip;
                                                ins->type = STACK_OBJ;
                                                ins->inst_p0 = mono_ldstr (cfg->domain, image, mono_metadata_token_index (n));
                                                ins->klass = mono_defaults.string_class;
                                                *sp = ins;
                                        }
                                }
                        }

                        sp++;
                        ip += 5;
                        break;
                case CEE_NEWOBJ: {
                        MonoInst *iargs [2];
                        MonoMethodSignature *fsig;
                        int temp;
                        
                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        cmethod = mini_get_method (method, token, NULL, generic_context);
                        if (!cmethod)
                                goto load_error;
                        fsig = mono_method_get_signature (cmethod, image, token);

                        mono_save_token_info (cfg, image, token, cmethod);

                        if (!mono_class_init (cmethod->klass))
                                goto load_error;

                        if (mono_security_get_mode () == MONO_SECURITY_MODE_CAS) {
                                if (check_linkdemand (cfg, method, cmethod, bblock, ip))
                                        INLINE_FAILURE;
                                CHECK_CFG_EXCEPTION;
                        } else if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR) {
                                ensure_method_is_allowed_to_call_method (cfg, method, cmethod, bblock, ip);
                        }

                        n = fsig->param_count;
                        CHECK_STACK (n);

                        /* move the args to allow room for 'this' in the first position */
                        while (n--) {
                                --sp;
                                sp [1] = sp [0];
                        }

                        handle_loaded_temps (cfg, bblock, stack_start, sp);

                        if (mini_class_is_system_array (cmethod->klass)) {
                                NEW_METHODCONST (cfg, *sp, cmethod);
                                temp = handle_array_new (cfg, bblock, fsig->param_count, sp, ip);
                        } else if (cmethod->string_ctor) {
                                /* we simply pass a null pointer */
                                NEW_PCONST (cfg, *sp, NULL); 
                                /* now call the string ctor */
                                temp = mono_emit_method_call_spilled (cfg, bblock, cmethod, fsig, sp, ip, NULL);
                        } else {
                                MonoInst* callvirt_this_arg = NULL;
                                
                                if (cmethod->klass->valuetype) {
                                        iargs [0] = mono_compile_create_var (cfg, &cmethod->klass->byval_arg, OP_LOCAL);
                                        temp = iargs [0]->inst_c0;

                                        NEW_TEMPLOADA (cfg, *sp, temp);

                                        handle_initobj (cfg, bblock, *sp, NULL, cmethod->klass, stack_start, sp);

                                        NEW_TEMPLOADA (cfg, *sp, temp);

                                        /* 
                                         * The code generated by mini_emit_virtual_call () expects
                                         * iargs [0] to be a boxed instance, but luckily the vcall
                                         * will be transformed into a normal call there.
                                         */
                                } else {
                                        temp = handle_alloc (cfg, bblock, cmethod->klass, FALSE, ip);
                                        NEW_TEMPLOAD (cfg, *sp, temp);
                                }

                                /* Avoid virtual calls to ctors if possible */
                                if (cmethod->klass->marshalbyref)
                                        callvirt_this_arg = sp [0];
                                
                                if ((cfg->opt & MONO_OPT_INLINE) && cmethod &&
                                    mono_method_check_inlining (cfg, cmethod) &&
                                    !mono_class_is_subclass_of (cmethod->klass, mono_defaults.exception_class, FALSE) &&
                                    !g_list_find (dont_inline, cmethod)) {
                                        int costs;
                                        MonoBasicBlock *ebblock;
                                        if ((costs = inline_method (cfg, cmethod, fsig, bblock, sp, ip, real_offset, dont_inline, &ebblock, FALSE))) {

                                                ip += 5;
                                                real_offset += 5;
                                                
                                                GET_BBLOCK (cfg, bblock, ip);
                                                ebblock->next_bb = bblock;
                                                link_bblock (cfg, ebblock, bblock);

                                                NEW_TEMPLOAD (cfg, *sp, temp);
                                                sp++;

                                                /* indicates start of a new block, and triggers a load 
                                                   of all stack arguments at bb boundarie */
                                                bblock = ebblock;

                                                inline_costs += costs;
                                                break;
                                                
                                        } else {
                                                /* Prevent inlining of methods which call other methods */
                                                INLINE_FAILURE;
                                                mono_emit_method_call_spilled (cfg, bblock, cmethod, fsig, sp, ip, callvirt_this_arg);
                                        }
                                } else {
                                        /* Prevent inlining of methods which call other methods */
                                        INLINE_FAILURE;
                                        /* now call the actual ctor */
                                        mono_emit_method_call_spilled (cfg, bblock, cmethod, fsig, sp, ip, callvirt_this_arg);
                                }
                        }

                        NEW_TEMPLOAD (cfg, *sp, temp);
                        sp++;
                        
                        ip += 5;
                        inline_costs += 5;
                        break;
                }
                case CEE_ISINST:
                        CHECK_STACK (1);
                        --sp;
                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        klass = mini_get_class (method, token, generic_context);
                        CHECK_TYPELOAD (klass);
                        if (sp [0]->type != STACK_OBJ)
                                UNVERIFIED;

                        /* Needed by the code generated in inssel.brg */
                        mono_get_got_var (cfg);

                        if (klass->marshalbyref || klass->flags & TYPE_ATTRIBUTE_INTERFACE) {
                        
                                MonoMethod *mono_isinst;
                                MonoInst *iargs [1];
                                MonoBasicBlock *ebblock;
                                int costs;
                                int temp;
                                
                                mono_isinst = mono_marshal_get_isinst (klass); 
                                iargs [0] = sp [0];
                                
                                costs = inline_method (cfg, mono_isinst, mono_method_signature (mono_isinst), bblock, 
                                                           iargs, ip, real_offset, dont_inline, &ebblock, TRUE);
                        
                                g_assert (costs > 0);
                                
                                ip += 5;
                                real_offset += 5;
                        
                                GET_BBLOCK (cfg, bblock, ip);
                                ebblock->next_bb = bblock;
                                link_bblock (cfg, ebblock, bblock);

                                temp = iargs [0]->inst_i0->inst_c0;
                                NEW_TEMPLOAD (cfg, *sp, temp);
                                
                                sp++;
                                bblock = ebblock;
                                inline_costs += costs;
                        } else {
                                MONO_INST_NEW (cfg, ins, *ip);
                                ins->type = STACK_OBJ;
                                ins->inst_left = *sp;
                                ins->inst_newa_class = klass;
                                ins->klass = klass;
                                ins->cil_code = ip;
                                *sp++ = emit_tree (cfg, bblock, ins, ip + 5);
                                ip += 5;
                        }
                        break;
                case CEE_UNBOX_ANY: {
                        MonoInst *add, *vtoffset;
                        MonoInst *iargs [3];

                        CHECK_STACK (1);
                        --sp;
                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        klass = mini_get_class (method, token, generic_context);
                        CHECK_TYPELOAD (klass);

                        if (MONO_TYPE_IS_REFERENCE (&klass->byval_arg)) {
                                /* CASTCLASS */
                                if (klass->marshalbyref || klass->flags & TYPE_ATTRIBUTE_INTERFACE) {
                                        MonoMethod *mono_castclass;
                                        MonoInst *iargs [1];
                                        MonoBasicBlock *ebblock;
                                        int costs;
                                        int temp;
                                        
                                        mono_castclass = mono_marshal_get_castclass (klass); 
                                        iargs [0] = sp [0];
                                        
                                        costs = inline_method (cfg, mono_castclass, mono_method_signature (mono_castclass), bblock, 
                                                                   iargs, ip, real_offset, dont_inline, &ebblock, TRUE);
                                
                                        g_assert (costs > 0);
                                        
                                        ip += 5;
                                        real_offset += 5;
                                
                                        GET_BBLOCK (cfg, bblock, ip);
                                        ebblock->next_bb = bblock;
                                        link_bblock (cfg, ebblock, bblock);
        
                                        temp = iargs [0]->inst_i0->inst_c0;
                                        NEW_TEMPLOAD (cfg, *sp, temp);
                                        
                                        sp++;
                                        bblock = ebblock;
                                        inline_costs += costs;                          
                                } else {
                                        MONO_INST_NEW (cfg, ins, CEE_CASTCLASS);
                                        ins->type = STACK_OBJ;
                                        ins->inst_left = *sp;
                                        ins->klass = klass;
                                        ins->inst_newa_class = klass;
                                        ins->cil_code = ip;
                                        *sp++ = ins;
                                        ip += 5;
                                }
                                break;
                        }

                        if (mono_class_is_nullable (klass)) {
                                int v = handle_unbox_nullable (cfg, bblock, *sp, ip, klass);
                                NEW_TEMPLOAD (cfg, *sp, v);
                                sp ++;
                                ip += 5;
                                break;
                        }

                        MONO_INST_NEW (cfg, ins, OP_UNBOXCAST);
                        ins->type = STACK_OBJ;
                        ins->inst_left = *sp;
                        ins->klass = klass;
                        ins->inst_newa_class = klass;
                        ins->cil_code = ip;

                        MONO_INST_NEW (cfg, add, OP_PADD);
                        NEW_ICONST (cfg, vtoffset, sizeof (MonoObject));
                        add->inst_left = ins;
                        add->inst_right = vtoffset;
                        add->type = STACK_MP;
                        add->klass = mono_defaults.object_class;
                        *sp = add;
                        ip += 5;
                        /* LDOBJ impl */
                        n = mono_class_value_size (klass, NULL);
                        ins = mono_compile_create_var (cfg, &klass->byval_arg, OP_LOCAL);
                        NEW_TEMPLOADA (cfg, iargs [0], ins->inst_c0);
                        if ((cfg->opt & MONO_OPT_INTRINS) && n <= sizeof (gpointer) * 5) {
                                MonoInst *copy;
                                MONO_INST_NEW (cfg, copy, OP_MEMCPY);
                                copy->inst_left = iargs [0];
                                copy->inst_right = *sp;
                                copy->cil_code = ip;
                                copy->backend.size = n;
                                MONO_ADD_INS (bblock, copy);
                        } else {
                                MonoMethod *memcpy_method = get_memcpy_method ();
                                iargs [1] = *sp;
                                NEW_ICONST (cfg, iargs [2], n);
                                iargs [2]->cil_code = ip;

                                mono_emit_method_call_spilled (cfg, bblock, memcpy_method, memcpy_method->signature, iargs, ip, NULL);
                        }
                        NEW_TEMPLOAD (cfg, *sp, ins->inst_c0);
                        ++sp;
                        inline_costs += 2;
                        break;
                }
                case CEE_UNBOX: {
                        MonoInst *add, *vtoffset;

                        CHECK_STACK (1);
                        --sp;
                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        klass = mini_get_class (method, token, generic_context);
                        CHECK_TYPELOAD (klass);

                        if (mono_class_is_nullable (klass)) {
                                int v = handle_unbox_nullable (cfg, bblock, *sp, ip, klass);
                                NEW_TEMPLOAD (cfg, *sp, v);
                                sp ++;
                                ip += 5;
                                break;
                        }

                        /* Needed by the code generated in inssel.brg */
                        mono_get_got_var (cfg);

                        MONO_INST_NEW (cfg, ins, OP_UNBOXCAST);
                        ins->type = STACK_OBJ;
                        ins->inst_left = *sp;
                        ins->klass = klass;
                        ins->inst_newa_class = klass;
                        ins->cil_code = ip;

                        MONO_INST_NEW (cfg, add, OP_PADD);
                        NEW_ICONST (cfg, vtoffset, sizeof (MonoObject));
                        add->inst_left = ins;
                        add->inst_right = vtoffset;
                        add->type = STACK_MP;
                        add->klass = klass;
                        *sp++ = add;
                        ip += 5;
                        inline_costs += 2;
                        break;
                }
                case CEE_CASTCLASS:
                        CHECK_STACK (1);
                        --sp;
                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        klass = mini_get_class (method, token, generic_context);
                        CHECK_TYPELOAD (klass);
                        if (sp [0]->type != STACK_OBJ)
                                UNVERIFIED;

                        /* Needed by the code generated in inssel.brg */
                        mono_get_got_var (cfg);
                
                        if (klass->marshalbyref || klass->flags & TYPE_ATTRIBUTE_INTERFACE) {
                                
                                MonoMethod *mono_castclass;
                                MonoInst *iargs [1];
                                MonoBasicBlock *ebblock;
                                int costs;
                                int temp;
                                
                                mono_castclass = mono_marshal_get_castclass (klass); 
                                iargs [0] = sp [0];
                                
                                costs = inline_method (cfg, mono_castclass, mono_method_signature (mono_castclass), bblock, 
                                                           iargs, ip, real_offset, dont_inline, &ebblock, TRUE);
                        
                                g_assert (costs > 0);
                                
                                ip += 5;
                                real_offset += 5;
                        
                                GET_BBLOCK (cfg, bblock, ip);
                                ebblock->next_bb = bblock;
                                link_bblock (cfg, ebblock, bblock);

                                temp = iargs [0]->inst_i0->inst_c0;
                                NEW_TEMPLOAD (cfg, *sp, temp);
                                
                                sp++;
                                bblock = ebblock;
                                inline_costs += costs;
                        } else {
                                MONO_INST_NEW (cfg, ins, *ip);
                                ins->type = STACK_OBJ;
                                ins->inst_left = *sp;
                                ins->klass = klass;
                                ins->inst_newa_class = klass;
                                ins->cil_code = ip;
                                *sp++ = emit_tree (cfg, bblock, ins, ip + 5);
                                ip += 5;
                        }
                        break;
                case CEE_THROW:
                        CHECK_STACK (1);
                        MONO_INST_NEW (cfg, ins, OP_THROW);
                        --sp;
                        ins->inst_left = *sp;
                        ins->cil_code = ip++;
                        bblock->out_of_line = TRUE;
                        MONO_ADD_INS (bblock, ins);
                        MONO_INST_NEW (cfg, ins, OP_NOT_REACHED);
                        ins->cil_code = ip - 1;
                        MONO_ADD_INS (bblock, ins);
                        sp = stack_start;
                        
                        link_bblock (cfg, bblock, end_bblock);
                        start_new_bblock = 1;
                        break;
                case CEE_LDFLD:
                case CEE_LDFLDA:
                case CEE_STFLD: {
                        MonoInst *offset_ins;
                        MonoClassField *field;
                        MonoBasicBlock *ebblock;
                        int costs;
                        guint foffset;

                        if (*ip == CEE_STFLD) {
                                CHECK_STACK (2);
                                sp -= 2;
                        } else {
                                CHECK_STACK (1);
                                --sp;
                        }
                        if (sp [0]->type == STACK_I4 || sp [0]->type == STACK_I8 || sp [0]->type == STACK_R8)
                                UNVERIFIED;
                        if (*ip != CEE_LDFLD && sp [0]->type == STACK_VTYPE)
                                UNVERIFIED;
                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        if (method->wrapper_type != MONO_WRAPPER_NONE) {
                                field = mono_method_get_wrapper_data (method, token);
                                klass = field->parent;
                        } else {
                                field = mono_field_from_token (image, token, &klass, generic_context);
                        }
                        if (!field)
                                goto load_error;
                        mono_class_init (klass);
                        if (!dont_verify && !cfg->skip_visibility && !mono_method_can_access_field (method, field))
                                UNVERIFIED;

                        foffset = klass->valuetype? field->offset - sizeof (MonoObject): field->offset;
                        /* FIXME: mark instructions for use in SSA */
                        if (*ip == CEE_STFLD) {
                                if (target_type_is_incompatible (cfg, field->type, sp [1]))
                                        UNVERIFIED;
                                if ((klass->marshalbyref && !MONO_CHECK_THIS (sp [0])) || klass->contextbound || klass == mono_defaults.marshalbyrefobject_class) {
                                        MonoMethod *stfld_wrapper = mono_marshal_get_stfld_wrapper (field->type); 
                                        MonoInst *iargs [5];

                                        iargs [0] = sp [0];
                                        NEW_CLASSCONST (cfg, iargs [1], klass);
                                        NEW_FIELDCONST (cfg, iargs [2], field);
                                        NEW_ICONST (cfg, iargs [3], klass->valuetype ? field->offset - sizeof (MonoObject) : 
                                                    field->offset);
                                        iargs [4] = sp [1];

                                        if (cfg->opt & MONO_OPT_INLINE) {
                                                costs = inline_method (cfg, stfld_wrapper, mono_method_signature (stfld_wrapper), bblock, 
                                                                       iargs, ip, real_offset, dont_inline, &ebblock, TRUE);
                                                g_assert (costs > 0);
                                                      
                                                ip += 5;
                                                real_offset += 5;

                                                GET_BBLOCK (cfg, bblock, ip);
                                                ebblock->next_bb = bblock;
                                                link_bblock (cfg, ebblock, bblock);

                                                /* indicates start of a new block, and triggers a load 
                                                   of all stack arguments at bb boundarie */
                                                bblock = ebblock;

                                                inline_costs += costs;
                                                break;
                                        } else {
                                                mono_emit_method_call_spilled (cfg, bblock, stfld_wrapper, mono_method_signature (stfld_wrapper), iargs, ip, NULL);
                                        }
#if HAVE_WRITE_BARRIERS
                                } else if (mono_type_to_stind (field->type) == CEE_STIND_REF) {
                                        /* insert call to write barrier */
                                        MonoMethod *write_barrier = mono_marshal_get_write_barrier ();
                                        MonoInst *iargs [2];
                                        NEW_ICONST (cfg, offset_ins, foffset);
                                        MONO_INST_NEW (cfg, ins, OP_PADD);
                                        ins->cil_code = ip;
                                        ins->inst_left = *sp;
                                        ins->inst_right = offset_ins;
                                        ins->type = STACK_MP;
                                        ins->klass = mono_defaults.object_class;
                                        iargs [0] = ins;
                                        iargs [1] = sp [1];
                                        mono_emit_method_call_spilled (cfg, bblock, write_barrier, mono_method_signature (write_barrier), iargs, ip, NULL);
#endif
#ifdef MONO_ARCH_SOFT_FLOAT
                                } else if (mono_type_to_stind (field->type) == CEE_STIND_R4) {
                                        NEW_ICONST (cfg, offset_ins, foffset);
                                        MONO_INST_NEW (cfg, ins, OP_PADD);
                                        ins->cil_code = ip;
                                        ins->inst_left = *sp;
                                        ins->inst_right = offset_ins;
                                        ins->type = STACK_MP;
                                        ins->klass = mono_defaults.object_class;
                                        handle_store_float (cfg, bblock, ins, sp [1], ip);
#endif
                                } else {
                                        MonoInst *store;
                                        NEW_ICONST (cfg, offset_ins, foffset);
                                        MONO_INST_NEW (cfg, ins, OP_PADD);
                                        ins->cil_code = ip;
                                        ins->inst_left = *sp;
                                        ins->inst_right = offset_ins;
                                        ins->type = STACK_MP;

                                        MONO_INST_NEW (cfg, store, mono_type_to_stind (field->type));
                                        store->cil_code = ip;
                                        store->inst_left = ins;
                                        store->inst_right = sp [1];
                                        handle_loaded_temps (cfg, bblock, stack_start, sp);
                                        store->flags |= ins_flag;
                                        ins_flag = 0;
                                        if (store->opcode == CEE_STOBJ) {
                                                handle_stobj (cfg, bblock, ins, sp [1], ip, 
                                                              mono_class_from_mono_type (field->type), FALSE, FALSE, TRUE);
                                        } else
                                                MONO_ADD_INS (bblock, store);
                                }
                        } else {
                                if ((klass->marshalbyref && !MONO_CHECK_THIS (sp [0])) || klass->contextbound || klass == mono_defaults.marshalbyrefobject_class) {
                                        MonoMethod *wrapper = (*ip == CEE_LDFLDA) ? mono_marshal_get_ldflda_wrapper (field->type) : mono_marshal_get_ldfld_wrapper (field->type); 
                                        MonoInst *iargs [4];
                                        int temp;
                                        
                                        iargs [0] = sp [0];
                                        NEW_CLASSCONST (cfg, iargs [1], klass);
                                        NEW_FIELDCONST (cfg, iargs [2], field);
                                        NEW_ICONST (cfg, iargs [3], klass->valuetype ? field->offset - sizeof (MonoObject) : field->offset);
                                        if ((cfg->opt & MONO_OPT_INLINE) && !MONO_TYPE_ISSTRUCT (mono_method_signature (wrapper)->ret)) {
                                                costs = inline_method (cfg, wrapper, mono_method_signature (wrapper), bblock, 
                                                                       iargs, ip, real_offset, dont_inline, &ebblock, TRUE);
                                                g_assert (costs > 0);
                                                      
                                                ip += 5;
                                                real_offset += 5;

                                                GET_BBLOCK (cfg, bblock, ip);
                                                ebblock->next_bb = bblock;
                                                link_bblock (cfg, ebblock, bblock);

                                                temp = iargs [0]->inst_i0->inst_c0;

                                                NEW_TEMPLOAD (cfg, *sp, temp);
                                                sp++;

                                                /* indicates start of a new block, and triggers a load of
                                                   all stack arguments at bb boundarie */
                                                bblock = ebblock;
                                                
                                                inline_costs += costs;
                                                break;
                                        } else {
                                                temp = mono_emit_method_call_spilled (cfg, bblock, wrapper, mono_method_signature (wrapper), iargs, ip, NULL);
                                                NEW_TEMPLOAD (cfg, *sp, temp);
                                                sp++;
                                        }
                                } else {
                                        NEW_ICONST (cfg, offset_ins, foffset);
                                        MONO_INST_NEW (cfg, ins, OP_PADD);
                                        ins->cil_code = ip;
                                        ins->inst_left = *sp;
                                        ins->inst_right = offset_ins;
                                        ins->type = STACK_MP;

                                        if (*ip == CEE_LDFLDA) {
                                                ins->klass = mono_class_from_mono_type (field->type);
                                                *sp++ = ins;
                                        } else {
                                                MonoInst *load;
                                                MONO_INST_NEW (cfg, load, mono_type_to_ldind (field->type));
                                                type_to_eval_stack_type (field->type, load);
                                                load->cil_code = ip;
                                                load->inst_left = ins;
                                                load->flags |= ins_flag;
                                                ins_flag = 0;
#ifdef MONO_ARCH_SOFT_FLOAT
                                                if (mono_type_to_ldind (field->type) == CEE_LDIND_R4) {
                                                        int temp;
                                                        temp = handle_load_float (cfg, bblock, ins, ip);
                                                        NEW_TEMPLOAD (cfg, *sp, temp);
                                                        sp++;
                                                } else
#endif
                                                *sp++ = load;
                                        }
                                }
                        }
                        ip += 5;
                        break;
                }
                case CEE_LDSFLD:
                case CEE_LDSFLDA:
                case CEE_STSFLD: {
                        MonoClassField *field;
                        gpointer addr = NULL;

                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        if (method->wrapper_type != MONO_WRAPPER_NONE) {
                                field = mono_method_get_wrapper_data (method, token);
                                klass = field->parent;
                        }
                        else
                                field = mono_field_from_token (image, token, &klass, generic_context);
                        if (!field)
                                goto load_error;
                        mono_class_init (klass);

                        g_assert (!(field->type->attrs & FIELD_ATTRIBUTE_LITERAL));

                        if ((*ip) == CEE_STSFLD)
                                handle_loaded_temps (cfg, bblock, stack_start, sp);

                        /* The special_static_fields field is init'd in mono_class_vtable, so it needs
                         * to be called here.
                         */
                        if (!(cfg->opt & MONO_OPT_SHARED))
                                mono_class_vtable (cfg->domain, klass);
                        mono_domain_lock (cfg->domain);
                        if (cfg->domain->special_static_fields)
                                addr = g_hash_table_lookup (cfg->domain->special_static_fields, field);
                        mono_domain_unlock (cfg->domain);

                        if ((cfg->opt & MONO_OPT_SHARED) || (cfg->compile_aot && addr)) {
                                int temp;
                                MonoInst *iargs [2];
                                MonoInst *domain_var;
                                
                                g_assert (field->parent);
                                /* avoid depending on undefined C behavior in sequence points */
                                domain_var = mono_get_domainvar (cfg);
                                NEW_TEMPLOAD (cfg, iargs [0], domain_var->inst_c0);
                                NEW_FIELDCONST (cfg, iargs [1], field);
                                temp = mono_emit_jit_icall (cfg, bblock, mono_class_static_field_address, iargs, ip);
                                NEW_TEMPLOAD (cfg, ins, temp);
                        } else {
                                MonoVTable *vtable;
                                vtable = mono_class_vtable (cfg->domain, klass);
                                if (!addr) {
                                        if (mini_field_access_needs_cctor_run (cfg, method, vtable) && !(g_slist_find (class_inits, vtable))) {
                                                guint8 *tramp = mono_create_class_init_trampoline (vtable);
                                                mono_emit_native_call (cfg, bblock, tramp, 
                                                                                           helper_sig_class_init_trampoline,
                                                                                           NULL, ip, FALSE, FALSE);
                                                if (cfg->verbose_level > 2)
                                                        g_print ("class %s.%s needs init call for %s\n", klass->name_space, klass->name, field->name);
                                                class_inits = g_slist_prepend (class_inits, vtable);
                                        } else {
                                                if (cfg->run_cctors) {
                                                        /* This makes so that inline cannot trigger */
                                                        /* .cctors: too many apps depend on them */
                                                        /* running with a specific order... */
                                                        if (! vtable->initialized)
                                                                INLINE_FAILURE;
                                                        mono_runtime_class_init (vtable);
                                                }
                                        }
                                        addr = (char*)vtable->data + field->offset;

                                        if (cfg->compile_aot)
                                                NEW_SFLDACONST (cfg, ins, field);
                                        else
                                                NEW_PCONST (cfg, ins, addr);
                                        ins->cil_code = ip;
                                } else {
                                        /* 
                                         * insert call to mono_threads_get_static_data (GPOINTER_TO_UINT (addr)) 
                                         * This could be later optimized to do just a couple of
                                         * memory dereferences with constant offsets.
                                         */
                                        int temp;
                                        MonoInst *iargs [1];
                                        NEW_ICONST (cfg, iargs [0], GPOINTER_TO_UINT (addr));
                                        temp = mono_emit_jit_icall (cfg, bblock, mono_get_special_static_data, iargs, ip);
                                        NEW_TEMPLOAD (cfg, ins, temp);
                                }
                        }

                        /* FIXME: mark instructions for use in SSA */
                        if (*ip == CEE_LDSFLDA) {
                                ins->klass = mono_class_from_mono_type (field->type);
                                *sp++ = ins;
                        } else if (*ip == CEE_STSFLD) {
                                MonoInst *store;
                                CHECK_STACK (1);
                                sp--;
                                MONO_INST_NEW (cfg, store, mono_type_to_stind (field->type));
                                store->cil_code = ip;
                                store->inst_left = ins;
                                store->inst_right = sp [0];
                                store->flags |= ins_flag;
                                ins_flag = 0;

                                if (store->opcode == CEE_STOBJ) {
                                        handle_stobj (cfg, bblock, ins, sp [0], ip, mono_class_from_mono_type (field->type), FALSE, FALSE, FALSE);
                                } else
                                        MONO_ADD_INS (bblock, store);
                        } else {
                                gboolean is_const = FALSE;
                                MonoVTable *vtable = mono_class_vtable (cfg->domain, klass);
                                if (!((cfg->opt & MONO_OPT_SHARED) || cfg->compile_aot) && 
                                    vtable->initialized && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY)) {
                                        gpointer addr = (char*)vtable->data + field->offset;
                                        int ro_type = field->type->type;
                                        if (ro_type == MONO_TYPE_VALUETYPE && field->type->data.klass->enumtype) {
                                                ro_type = field->type->data.klass->enum_basetype->type;
                                        }
                                        /* g_print ("RO-FIELD %s.%s:%s\n", klass->name_space, klass->name, field->name);*/
                                        is_const = TRUE;
                                        switch (ro_type) {
                                        case MONO_TYPE_BOOLEAN:
                                        case MONO_TYPE_U1:
                                                NEW_ICONST (cfg, *sp, *((guint8 *)addr));
                                                sp++;
                                                break;
                                        case MONO_TYPE_I1:
                                                NEW_ICONST (cfg, *sp, *((gint8 *)addr));
                                                sp++;
                                                break;                                          
                                        case MONO_TYPE_CHAR:
                                        case MONO_TYPE_U2:
                                                NEW_ICONST (cfg, *sp, *((guint16 *)addr));
                                                sp++;
                                                break;
                                        case MONO_TYPE_I2:
                                                NEW_ICONST (cfg, *sp, *((gint16 *)addr));
                                                sp++;
                                                break;
                                                break;
                                        case MONO_TYPE_I4:
                                                NEW_ICONST (cfg, *sp, *((gint32 *)addr));
                                                sp++;
                                                break;                                          
                                        case MONO_TYPE_U4:
                                                NEW_ICONST (cfg, *sp, *((guint32 *)addr));
                                                sp++;
                                                break;
#ifndef HAVE_MOVING_COLLECTOR
                                        case MONO_TYPE_I:
                                        case MONO_TYPE_U:
                                        case MONO_TYPE_STRING:
                                        case MONO_TYPE_OBJECT:
                                        case MONO_TYPE_CLASS:
                                        case MONO_TYPE_SZARRAY:
                                        case MONO_TYPE_PTR:
                                        case MONO_TYPE_FNPTR:
                                        case MONO_TYPE_ARRAY:
                                                NEW_PCONST (cfg, *sp, *((gpointer *)addr));
                                                type_to_eval_stack_type (field->type, *sp);
                                                sp++;
                                                break;
#endif
                                        case MONO_TYPE_I8:
                                        case MONO_TYPE_U8:
                                                MONO_INST_NEW (cfg, *sp, OP_I8CONST);
                                                sp [0]->type = STACK_I8;
                                                sp [0]->inst_l = *((gint64 *)addr);
                                                sp++;
                                                break;
                                        case MONO_TYPE_R4:
                                        case MONO_TYPE_R8:
                                        case MONO_TYPE_VALUETYPE:
                                        default:
                                                is_const = FALSE;
                                                break;
                                        }
                                }

                                if (!is_const) {
                                        MonoInst *load;
                                        CHECK_STACK_OVF (1);
                                        MONO_INST_NEW (cfg, load, mono_type_to_ldind (field->type));
                                        type_to_eval_stack_type (field->type, load);
                                        load->cil_code = ip;
                                        load->inst_left = ins;
                                        *sp++ = load;
                                        load->flags |= ins_flag;
                                        ins_flag = 0;
                                        /* fixme: dont see the problem why this does not work */
                                        //cfg->disable_aot = TRUE;
                                }
                        }
                        ip += 5;
                        break;
                }
                case CEE_STOBJ:
                        CHECK_STACK (2);
                        sp -= 2;
                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        klass = mini_get_class (method, token, generic_context);
                        CHECK_TYPELOAD (klass);
                        n = mono_type_to_stind (&klass->byval_arg);
                        if (n == CEE_STOBJ) {
                                handle_stobj (cfg, bblock, sp [0], sp [1], ip, klass, FALSE, FALSE, TRUE);
                        } else {
                                /* FIXME: should check item at sp [1] is compatible with the type of the store. */
                                MonoInst *store;
                                MONO_INST_NEW (cfg, store, n);
                                store->cil_code = ip;
                                store->inst_left = sp [0];
                                store->inst_right = sp [1];
                                store->flags |= ins_flag;
                                MONO_ADD_INS (bblock, store);
                        }
                        ins_flag = 0;
                        ip += 5;
                        inline_costs += 1;
                        break;
                case CEE_BOX: {
                        MonoInst *val;
                        CHECK_STACK (1);
                        --sp;
                        val = *sp;
                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        klass = mini_get_class (method, token, generic_context);
                        CHECK_TYPELOAD (klass);

                        if (MONO_TYPE_IS_REFERENCE (&klass->byval_arg)) {
                                *sp++ = val;
                                ip += 5;
                                break;
                        }
                        if (klass == mono_defaults.void_class)
                                UNVERIFIED;
                        if (target_type_is_incompatible (cfg, &klass->byval_arg, *sp))
                                UNVERIFIED;
                        /* frequent check in generic code: box (struct), brtrue */
                        if (!mono_class_is_nullable (klass) &&
                            ip + 5 < end && ip_in_bb (cfg, bblock, ip + 5) && (ip [5] == CEE_BRTRUE || ip [5] == CEE_BRTRUE_S)) {
                                /*g_print ("box-brtrue opt at 0x%04x in %s\n", real_offset, method->name);*/
                                MONO_INST_NEW (cfg, ins, CEE_POP);
                                MONO_ADD_INS (bblock, ins);
                                ins->cil_code = ip;
                                ins->inst_i0 = *sp;
                                ip += 5;
                                MONO_INST_NEW (cfg, ins, OP_BR);
                                ins->cil_code = ip;
                                MONO_ADD_INS (bblock, ins);
                                if (*ip == CEE_BRTRUE_S) {
                                        CHECK_OPSIZE (2);
                                        ip++;
                                        target = ip + 1 + (signed char)(*ip);
                                        ip++;
                                } else {
                                        CHECK_OPSIZE (5);
                                        ip++;
                                        target = ip + 4 + (gint)(read32 (ip));
                                        ip += 4;
                                }
                                GET_BBLOCK (cfg, tblock, target);
                                link_bblock (cfg, bblock, tblock);
                                CHECK_BBLOCK (target, ip, tblock);
                                ins->inst_target_bb = tblock;
                                GET_BBLOCK (cfg, tblock, ip);
                                link_bblock (cfg, bblock, tblock);
                                if (sp != stack_start) {
                                        handle_stack_args (cfg, bblock, stack_start, sp - stack_start);
                                        sp = stack_start;
                                        CHECK_UNVERIFIABLE (cfg);
                                }
                                start_new_bblock = 1;
                                break;
                        }
                        *sp++ = handle_box (cfg, bblock, val, ip, klass);
                        ip += 5;
                        inline_costs += 1;
                        break;
                }
                case CEE_NEWARR:
                        CHECK_STACK (1);
                        MONO_INST_NEW (cfg, ins, *ip);
                        ins->cil_code = ip;
                        --sp;

                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);

                        /* allocate the domainvar - becaus this is used in decompose_foreach */
                        if (cfg->opt & MONO_OPT_SHARED) {
                                mono_get_domainvar (cfg);
                                /* LAME-IR: Mark it as used since otherwise it will be optimized away */
                                cfg->domainvar->flags |= MONO_INST_VOLATILE;
                        }

                        /* Ditto */
                        mono_get_got_var (cfg);

                        klass = mini_get_class (method, token, generic_context);
                        CHECK_TYPELOAD (klass);
                        ins->inst_newa_class = klass;
                        ins->inst_newa_len = *sp;
                        ins->type = STACK_OBJ;
                        ins->klass = mono_array_class_get (klass, 1);
                        ip += 5;
                        *sp++ = ins;
                        /* 
                         * we store the object so calls to create the array are not interleaved
                         * with the arguments of other calls.
                         */
                        if (1) {
                                MonoInst *store, *temp, *load;
                                const char *data_ptr;
                                int data_size = 0;
                                --sp;
                                temp = mono_compile_create_var (cfg, type_from_stack_type (ins), OP_LOCAL);
                                NEW_TEMPSTORE (cfg, store, temp->inst_c0, ins);
                                store->cil_code = ins->cil_code;
                                MONO_ADD_INS (bblock, store);
                                /* 
                                 * we inline/optimize the initialization sequence if possible.
                                 * we should also allocate the array as not cleared, since we spend as much time clearing to 0 as initializing
                                 * for small sizes open code the memcpy
                                 * ensure the rva field is big enough
                                 */
                                if ((cfg->opt & MONO_OPT_INTRINS) && ip_in_bb (cfg, bblock, ip + 6) && (data_ptr = initialize_array_data (method, cfg->compile_aot, ip, ins, &data_size))) {
                                        MonoMethod *memcpy_method = get_memcpy_method ();
                                        MonoInst *data_offset, *add;
                                        MonoInst *iargs [3];
                                        NEW_ICONST (cfg, iargs [2], data_size);
                                        NEW_TEMPLOAD (cfg, load, temp->inst_c0);
                                        load->cil_code = ins->cil_code;
                                        NEW_ICONST (cfg, data_offset, G_STRUCT_OFFSET (MonoArray, vector));
                                        MONO_INST_NEW (cfg, add, OP_PADD);
                                        add->inst_left = load;
                                        add->inst_right = data_offset;
                                        add->cil_code = ip;
                                        iargs [0] = add;
                                        if (cfg->compile_aot) {
                                                NEW_AOTCONST_TOKEN (cfg, iargs [1], MONO_PATCH_INFO_RVA, method->klass->image, GPOINTER_TO_UINT(data_ptr), STACK_PTR, NULL);
                                        } else {
                                                NEW_PCONST (cfg, iargs [1], (char*)data_ptr);
                                        }
                                        mono_emit_method_call_spilled (cfg, bblock, memcpy_method, memcpy_method->signature, iargs, ip, NULL);
                                        ip += 11;
                                }
                                NEW_TEMPLOAD (cfg, load, temp->inst_c0);
                                load->cil_code = ins->cil_code;
                                *sp++ = load;
                        }
                        inline_costs += 1;
                        break;
                case CEE_LDLEN:
                        CHECK_STACK (1);
                        --sp;
                        if (sp [0]->type != STACK_OBJ)
                                UNVERIFIED;
                        MONO_INST_NEW (cfg, ins, *ip);
                        ins->cil_code = ip++;
                        ins->inst_left = *sp;
                        ins->type = STACK_PTR;
                        *sp++ = ins;
                        break;
                case CEE_LDELEMA:
                        CHECK_STACK (2);
                        sp -= 2;
                        CHECK_OPSIZE (5);
                        if (sp [0]->type != STACK_OBJ)
                                UNVERIFIED;

                        klass = mini_get_class (method, read32 (ip + 1), generic_context);
                        CHECK_TYPELOAD (klass);
                        /* we need to make sure that this array is exactly the type it needs
                         * to be for correctness. the wrappers are lax with their usage
                         * so we need to ignore them here
                         */
                        if (!klass->valuetype && method->wrapper_type == MONO_WRAPPER_NONE) {
                                MonoInst* check;

                                /* Needed by the code generated in inssel.brg */
                                mono_get_got_var (cfg);

                                MONO_INST_NEW (cfg, check, OP_CHECK_ARRAY_TYPE);
                                check->cil_code = ip;
                                check->klass = klass;
                                check->inst_left = sp [0];
                                check->type = STACK_OBJ;
                                check->klass = klass;
                                sp [0] = check;
                        }
                        
                        mono_class_init (klass);
                        NEW_LDELEMA (cfg, ins, sp, klass);
                        ins->cil_code = ip;
                        *sp++ = ins;
                        ip += 5;
                        break;
                case CEE_LDELEM_ANY: {
                        MonoInst *load;
                        CHECK_STACK (2);
                        sp -= 2;
                        if (sp [0]->type != STACK_OBJ)
                                UNVERIFIED;
                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        klass = mono_class_get_full (image, token, generic_context);
                        CHECK_TYPELOAD (klass);
                        mono_class_init (klass);
                        NEW_LDELEMA (cfg, load, sp, klass);
                        load->cil_code = ip;
                        MONO_INST_NEW (cfg, ins, mono_type_to_ldind (&klass->byval_arg));
                        ins->cil_code = ip;
                        ins->inst_left = load;
                        *sp++ = ins;
                        type_to_eval_stack_type (&klass->byval_arg, ins);
                        ip += 5;
                        break;
                }
                case CEE_LDELEM_I1:
                case CEE_LDELEM_U1:
                case CEE_LDELEM_I2:
                case CEE_LDELEM_U2:
                case CEE_LDELEM_I4:
                case CEE_LDELEM_U4:
                case CEE_LDELEM_I8:
                case CEE_LDELEM_I:
                case CEE_LDELEM_R4:
                case CEE_LDELEM_R8:
                case CEE_LDELEM_REF: {
                        MonoInst *load;
                        /*
                         * translate to:
                         * ldind.x (ldelema (array, index))
                         * ldelema does the bounds check
                         */
                        CHECK_STACK (2);
                        sp -= 2;
                        if (sp [0]->type != STACK_OBJ)
                                UNVERIFIED;
                        klass = array_access_to_klass (*ip, sp [0]);
                        NEW_LDELEMA (cfg, load, sp, klass);
                        load->cil_code = ip;
#ifdef MONO_ARCH_SOFT_FLOAT
                        if (*ip == CEE_LDELEM_R4) {
                                int temp;
                                temp = handle_load_float (cfg, bblock, load, ip);
                                NEW_TEMPLOAD (cfg, *sp, temp);
                                sp++;
                                ++ip;
                                break;
                        }
#endif
                        MONO_INST_NEW (cfg, ins, ldelem_to_ldind [*ip - CEE_LDELEM_I1]);
                        ins->cil_code = ip;
                        ins->inst_left = load;
                        *sp++ = ins;
                        ins->type = ldind_type [ins->opcode - CEE_LDIND_I1];
                        ins->klass = klass;
                        ++ip;
                        break;
                }
                case CEE_STELEM_I:
                case CEE_STELEM_I1:
                case CEE_STELEM_I2:
                case CEE_STELEM_I4:
                case CEE_STELEM_I8:
                case CEE_STELEM_R4:
                case CEE_STELEM_R8: {
                        MonoInst *load;
                        /*
                         * translate to:
                         * stind.x (ldelema (array, index), val)
                         * ldelema does the bounds check
                         */
                        CHECK_STACK (3);
                        sp -= 3;
                        if (sp [0]->type != STACK_OBJ)
                                UNVERIFIED;
                        klass = array_access_to_klass (*ip, sp [0]);
                        NEW_LDELEMA (cfg, load, sp, klass);
                        load->cil_code = ip;
#ifdef MONO_ARCH_SOFT_FLOAT
                        if (*ip == CEE_STELEM_R4) {
                                handle_store_float (cfg, bblock, load, sp [2], ip);
                                ip++;
                                break;
                        }
#endif
                        MONO_INST_NEW (cfg, ins, stelem_to_stind [*ip - CEE_STELEM_I]);
                        ins->cil_code = ip;
                        ins->inst_left = load;
                        ins->inst_right = sp [2];
                        ++ip;
                        handle_loaded_temps (cfg, bblock, stack_start, sp);
                        MONO_ADD_INS (bblock, ins);
                        inline_costs += 1;
                        break;
                }
                case CEE_STELEM_ANY: {
                        MonoInst *load;
                        /*
                         * translate to:
                         * stind.x (ldelema (array, index), val)
                         * ldelema does the bounds check
                         */
                        CHECK_STACK (3);
                        sp -= 3;
                        if (sp [0]->type != STACK_OBJ)
                                UNVERIFIED;
                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        klass = mono_class_get_full (image, token, generic_context);
                        CHECK_TYPELOAD (klass);
                        mono_class_init (klass);
                        if (MONO_TYPE_IS_REFERENCE (&klass->byval_arg)) {
                                /* storing a NULL doesn't need any of the complex checks in stelemref */
                                if (sp [2]->opcode == OP_PCONST && sp [2]->inst_p0 == NULL) {
                                        MonoInst *load;
                                        NEW_LDELEMA (cfg, load, sp, mono_defaults.object_class);
                                        load->cil_code = ip;
                                        MONO_INST_NEW (cfg, ins, stelem_to_stind [*ip - CEE_STELEM_I]);
                                        ins->cil_code = ip;
                                        ins->inst_left = load;
                                        ins->inst_right = sp [2];
                                        MONO_ADD_INS (bblock, ins);
                                } else {
                                        MonoMethod* helper = mono_marshal_get_stelemref ();
                                        MonoInst *iargs [3];
                                        handle_loaded_temps (cfg, bblock, stack_start, sp);

                                        iargs [2] = sp [2];
                                        iargs [1] = sp [1];
                                        iargs [0] = sp [0];

                                        mono_emit_method_call_spilled (cfg, bblock, helper, mono_method_signature (helper), iargs, ip, NULL);
                                }
                        } else {
                                NEW_LDELEMA (cfg, load, sp, klass);
                                load->cil_code = ip;

                                n = mono_type_to_stind (&klass->byval_arg);
                                if (n == CEE_STOBJ)
                                        handle_stobj (cfg, bblock, load, sp [2], ip, klass, FALSE, FALSE, TRUE);
                                else {
                                        MONO_INST_NEW (cfg, ins, n);
                                        ins->cil_code = ip;
                                        ins->inst_left = load;
                                        ins->inst_right = sp [2];
                                        handle_loaded_temps (cfg, bblock, stack_start, sp);
                                        MONO_ADD_INS (bblock, ins);
                                }
                        }
                        ip += 5;
                        inline_costs += 1;
                        break;
                }
                case CEE_STELEM_REF: {
                        MonoInst *iargs [3];
                        MonoMethod* helper = mono_marshal_get_stelemref ();

                        CHECK_STACK (3);
                        sp -= 3;
                        if (sp [0]->type != STACK_OBJ)
                                UNVERIFIED;
                        if (sp [2]->type != STACK_OBJ)
                                UNVERIFIED;

                        handle_loaded_temps (cfg, bblock, stack_start, sp);

                        /* storing a NULL doesn't need any of the complex checks in stelemref */
                        if (sp [2]->opcode == OP_PCONST && sp [2]->inst_p0 == NULL) {
                                MonoInst *load;
                                NEW_LDELEMA (cfg, load, sp, mono_defaults.object_class);
                                load->cil_code = ip;
                                MONO_INST_NEW (cfg, ins, stelem_to_stind [*ip - CEE_STELEM_I]);
                                ins->cil_code = ip;
                                ins->inst_left = load;
                                ins->inst_right = sp [2];
                                MONO_ADD_INS (bblock, ins);
                        } else {
                                iargs [2] = sp [2];
                                iargs [1] = sp [1];
                                iargs [0] = sp [0];
                        
                                mono_emit_method_call_spilled (cfg, bblock, helper, mono_method_signature (helper), iargs, ip, NULL);
                                inline_costs += 1;
                        }

                        ++ip;
                        break;
                }
                case CEE_CKFINITE: {
                        MonoInst *store, *temp;
                        CHECK_STACK (1);

                        /* this instr. can throw exceptions as side effect,
                         * so we cant eliminate dead code which contains CKFINITE opdodes.
                         * Spilling to memory makes sure that we always perform
                         * this check */

                        
                        MONO_INST_NEW (cfg, ins, OP_CKFINITE);
                        ins->cil_code = ip;
                        ins->inst_left = sp [-1];
                        temp = mono_compile_create_var (cfg, &mono_defaults.double_class->byval_arg, OP_LOCAL);

                        NEW_TEMPSTORE (cfg, store, temp->inst_c0, ins);
                        store->cil_code = ip;
                        MONO_ADD_INS (bblock, store);

                        NEW_TEMPLOAD (cfg, sp [-1], temp->inst_c0);
                       
                        ++ip;
                        break;
                }
                case CEE_REFANYVAL:
                        CHECK_STACK (1);
                        MONO_INST_NEW (cfg, ins, *ip);
                        --sp;
                        CHECK_OPSIZE (5);
                        klass = mono_class_get_full (image, read32 (ip + 1), generic_context);
                        CHECK_TYPELOAD (klass);
                        mono_class_init (klass);
                        ins->type = STACK_MP;
                        ins->inst_left = *sp;
                        ins->klass = klass;
                        ins->inst_newa_class = klass;
                        ins->cil_code = ip;
                        ip += 5;
                        *sp++ = ins;
                        break;
                case CEE_MKREFANY: {
                        MonoInst *loc, *klassconst;

                        CHECK_STACK (1);
                        MONO_INST_NEW (cfg, ins, *ip);
                        --sp;
                        CHECK_OPSIZE (5);
                        klass = mono_class_get_full (image, read32 (ip + 1), generic_context);
                        CHECK_TYPELOAD (klass);
                        mono_class_init (klass);
                        ins->cil_code = ip;

                        loc = mono_compile_create_var (cfg, &mono_defaults.typed_reference_class->byval_arg, OP_LOCAL);
                        NEW_TEMPLOADA (cfg, ins->inst_right, loc->inst_c0);

                        NEW_PCONST (cfg, klassconst, klass);
                        NEW_GROUP (cfg, ins->inst_left, *sp, klassconst);
                        
                        MONO_ADD_INS (bblock, ins);

                        NEW_TEMPLOAD (cfg, *sp, loc->inst_c0);
                        ++sp;
                        ip += 5;
                        break;
                }
                case CEE_LDTOKEN: {
                        gpointer handle;
                        MonoClass *handle_class;

                        CHECK_STACK_OVF (1);

                        CHECK_OPSIZE (5);
                        n = read32 (ip + 1);

                        if (method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD) {
                                handle = mono_method_get_wrapper_data (method, n);
                                handle_class = mono_method_get_wrapper_data (method, n + 1);
                                if (handle_class == mono_defaults.typehandle_class)
                                        handle = &((MonoClass*)handle)->byval_arg;
                        }
                        else {
                                handle = mono_ldtoken (image, n, &handle_class, generic_context);
                        }
                        if (!handle)
                                goto load_error;
                        mono_class_init (handle_class);

                        if (cfg->opt & MONO_OPT_SHARED) {
                                int temp;
                                MonoInst *res, *store, *addr, *vtvar, *iargs [3];

                                vtvar = mono_compile_create_var (cfg, &handle_class->byval_arg, OP_LOCAL); 

                                NEW_IMAGECONST (cfg, iargs [0], image);
                                NEW_ICONST (cfg, iargs [1], n);
                                NEW_PCONST (cfg, iargs [2], generic_context);
                                temp = mono_emit_jit_icall (cfg, bblock, mono_ldtoken_wrapper, iargs, ip);
                                NEW_TEMPLOAD (cfg, res, temp);
                                NEW_TEMPLOADA (cfg, addr, vtvar->inst_c0);
                                NEW_INDSTORE (cfg, store, addr, res, &mono_defaults.int_class->byval_arg);
                                MONO_ADD_INS (bblock, store);
                                NEW_TEMPLOAD (cfg, ins, vtvar->inst_c0);
                        } else {
                                if ((ip [5] == CEE_CALL) && (cmethod = mini_get_method (method, read32 (ip + 6), NULL, generic_context)) &&
                                                (cmethod->klass == mono_defaults.monotype_class->parent) &&
                                                (strcmp (cmethod->name, "GetTypeFromHandle") == 0) && ip_in_bb (cfg, bblock, ip + 5)) {
                                        MonoClass *tclass = mono_class_from_mono_type (handle);
                                        mono_class_init (tclass);
                                        if (cfg->compile_aot)
                                                NEW_TYPE_FROM_HANDLE_CONST (cfg, ins, image, n);
                                        else
                                                NEW_PCONST (cfg, ins, mono_type_get_object (cfg->domain, handle));
                                        ins->type = STACK_OBJ;
                                        ins->klass = cmethod->klass;
                                        ip += 5;
                                } else {
                                        MonoInst *store, *addr, *vtvar;

                                        if (cfg->compile_aot)
                                                NEW_LDTOKENCONST (cfg, ins, image, n);
                                        else
                                                NEW_PCONST (cfg, ins, handle);
                                        vtvar = mono_compile_create_var (cfg, &handle_class->byval_arg, OP_LOCAL);
                                        NEW_TEMPLOADA (cfg, addr, vtvar->inst_c0);
                                        NEW_INDSTORE (cfg, store, addr, ins, &mono_defaults.int_class->byval_arg);
                                        MONO_ADD_INS (bblock, store);
                                        NEW_TEMPLOAD (cfg, ins, vtvar->inst_c0);
                                }
                        }

                        *sp++ = ins;
                        ip += 5;
                        break;
                }
                case CEE_CONV_U2:
                case CEE_CONV_U1:
                case CEE_CONV_I:
                        CHECK_STACK (1);
                        ADD_UNOP (*ip);
                        ip++;
                        break;
                case CEE_ADD_OVF:
                case CEE_ADD_OVF_UN:
                case CEE_MUL_OVF:
                case CEE_MUL_OVF_UN:
                case CEE_SUB_OVF:
                case CEE_SUB_OVF_UN:
                        CHECK_STACK (2);
                        ADD_BINOP (*ip);
                        if (mono_find_jit_opcode_emulation (ins->opcode)) {
                                --sp;
                                *sp++ = emit_tree (cfg, bblock, ins, ip + 1);
                        }
                        ip++;
                        break;
                case CEE_ENDFINALLY:
                        MONO_INST_NEW (cfg, ins, OP_ENDFINALLY);
                        MONO_ADD_INS (bblock, ins);
                        ins->cil_code = ip++;
                        start_new_bblock = 1;

                        /*
                         * Control will leave the method so empty the stack, otherwise
                         * the next basic block will start with a nonempty stack.
                         */
                        while (sp != stack_start) {
                                MONO_INST_NEW (cfg, ins, CEE_POP);
                                ins->cil_code = ip;
                                sp--;
                                ins->inst_i0 = *sp;
                                MONO_ADD_INS (bblock, ins);
                        }
                        break;
                case CEE_LEAVE:
                case CEE_LEAVE_S: {
                        GList *handlers;

                        if (*ip == CEE_LEAVE) {
                                CHECK_OPSIZE (5);
                                target = ip + 5 + (gint32)read32(ip + 1);
                        } else {
                                CHECK_OPSIZE (2);
                                target = ip + 2 + (signed char)(ip [1]);
                        }

                        /* empty the stack */
                        while (sp != stack_start) {
                                MONO_INST_NEW (cfg, ins, CEE_POP);
                                ins->cil_code = ip;
                                sp--;
                                ins->inst_i0 = *sp;
                                MONO_ADD_INS (bblock, ins);
                        }

                        /* 
                         * If this leave statement is in a catch block, check for a
                         * pending exception, and rethrow it if necessary.
                         */
                        for (i = 0; i < header->num_clauses; ++i) {
                                MonoExceptionClause *clause = &header->clauses [i];

                                /* 
                                 * Use <= in the final comparison to handle clauses with multiple
                                 * leave statements, like in bug #78024.
                                 * The ordering of the exception clauses guarantees that we find the
                                 * innermost clause.
                                 */
                                if (MONO_OFFSET_IN_HANDLER (clause, ip - header->code) && (clause->flags == MONO_EXCEPTION_CLAUSE_NONE) && (ip - header->code + ((*ip == CEE_LEAVE) ? 5 : 2)) <= (clause->handler_offset + clause->handler_len)) {
                                        int temp;
                                        MonoInst *load;

                                        NEW_TEMPLOAD (cfg, load, mono_find_exvar_for_offset (cfg, clause->handler_offset)->inst_c0);
                                        load->cil_code = ip;

                                        temp = mono_emit_jit_icall (cfg, bblock, mono_thread_get_pending_exception, NULL, ip);
                                        NEW_TEMPLOAD (cfg, *sp, temp);
                                
                                        MONO_INST_NEW (cfg, ins, OP_THROW_OR_NULL);
                                        ins->inst_left = *sp;
                                        ins->inst_right = load;
                                        ins->cil_code = ip;
                                        MONO_ADD_INS (bblock, ins);
                                }
                        }

                        if ((handlers = mono_find_final_block (cfg, ip, target, MONO_EXCEPTION_CLAUSE_FINALLY))) {
                                GList *tmp;
                                for (tmp = handlers; tmp; tmp = tmp->next) {
                                        tblock = tmp->data;
                                        link_bblock (cfg, bblock, tblock);
                                        MONO_INST_NEW (cfg, ins, OP_CALL_HANDLER);
                                        ins->cil_code = ip;
                                        ins->inst_target_bb = tblock;
                                        MONO_ADD_INS (bblock, ins);
                                }
                                g_list_free (handlers);
                        } 

                        MONO_INST_NEW (cfg, ins, OP_BR);
                        ins->cil_code = ip;
                        MONO_ADD_INS (bblock, ins);
                        GET_BBLOCK (cfg, tblock, target);
                        link_bblock (cfg, bblock, tblock);
                        CHECK_BBLOCK (target, ip, tblock);
                        ins->inst_target_bb = tblock;
                        start_new_bblock = 1;

                        if (*ip == CEE_LEAVE)
                                ip += 5;
                        else
                                ip += 2;

                        break;
                }
                case CEE_STIND_I:
                        CHECK_STACK (2);
                        MONO_INST_NEW (cfg, ins, *ip);
                        sp -= 2;
                        handle_loaded_temps (cfg, bblock, stack_start, sp);
                        MONO_ADD_INS (bblock, ins);
                        ins->cil_code = ip++;
                        ins->inst_i0 = sp [0];
                        ins->inst_i1 = sp [1];
                        inline_costs += 1;
                        break;
                case CEE_CONV_U:
                        CHECK_STACK (1);
                        ADD_UNOP (*ip);
                        ip++;
                        break;
                /* trampoline mono specific opcodes */
                case MONO_CUSTOM_PREFIX: {

                        g_assert (method->wrapper_type != MONO_WRAPPER_NONE);

                        CHECK_OPSIZE (2);
                        switch (ip [1]) {

                        case CEE_MONO_ICALL: {
                                int temp;
                                gpointer func;
                                MonoJitICallInfo *info;

                                token = read32 (ip + 2);
                                func = mono_method_get_wrapper_data (method, token);
                                info = mono_find_jit_icall_by_addr (func);
                                if (info == NULL){
                                        g_error ("An attempt has been made to perform an icall to address %p, "
                                                 "but the address has not been registered as an icall\n", info);
                                        g_assert_not_reached ();
                                }

                                CHECK_STACK (info->sig->param_count);
                                sp -= info->sig->param_count;

                                temp = mono_emit_jit_icall (cfg, bblock, info->func, sp, ip);
                                if (!MONO_TYPE_IS_VOID (info->sig->ret)) {
                                        NEW_TEMPLOAD (cfg, *sp, temp);
                                        sp++;
                                }

                                ip += 6;
                                inline_costs += 10 * num_calls++;

                                break;
                        }
                        case CEE_MONO_LDPTR:
                                CHECK_STACK_OVF (1);
                                CHECK_OPSIZE (6);
                                token = read32 (ip + 2);
                                NEW_PCONST (cfg, ins, mono_method_get_wrapper_data (method, token));
                                ins->cil_code = ip;
                                *sp++ = ins;
                                ip += 6;
                                inline_costs += 10 * num_calls++;
                                /* Can't embed random pointers into AOT code */
                                cfg->disable_aot = 1;
                                break;
                        case CEE_MONO_VTADDR:
                                CHECK_STACK (1);
                                --sp;
                                MONO_INST_NEW (cfg, ins, OP_VTADDR);
                                ins->cil_code = ip;
                                ins->type = STACK_MP;
                                ins->inst_left = *sp;
                                *sp++ = ins;
                                ip += 2;
                                break;
                        case CEE_MONO_NEWOBJ: {
                                MonoInst *iargs [2];
                                int temp;
                                CHECK_STACK_OVF (1);
                                CHECK_OPSIZE (6);
                                token = read32 (ip + 2);
                                klass = (MonoClass *)mono_method_get_wrapper_data (method, token);
                                mono_class_init (klass);
                                NEW_DOMAINCONST (cfg, iargs [0]);
                                NEW_CLASSCONST (cfg, iargs [1], klass);
                                temp = mono_emit_jit_icall (cfg, bblock, mono_object_new, iargs, ip);
                                NEW_TEMPLOAD (cfg, *sp, temp);
                                sp++;
                                ip += 6;
                                inline_costs += 10 * num_calls++;
                                break;
                        }
                        case CEE_MONO_OBJADDR:
                                CHECK_STACK (1);
                                --sp;
                                MONO_INST_NEW (cfg, ins, OP_OBJADDR);
                                ins->cil_code = ip;
                                ins->type = STACK_MP;
                                ins->inst_left = *sp;
                                *sp++ = ins;
                                ip += 2;
                                break;
                        case CEE_MONO_LDNATIVEOBJ:
                                CHECK_STACK (1);
                                CHECK_OPSIZE (6);
                                token = read32 (ip + 2);
                                klass = mono_method_get_wrapper_data (method, token);
                                g_assert (klass->valuetype);
                                mono_class_init (klass);
                                NEW_INDLOAD (cfg, ins, sp [-1], &klass->byval_arg);
                                sp [-1] = ins;
                                ip += 6;
                                break;
                        case CEE_MONO_RETOBJ:
                                g_assert (cfg->ret);
                                g_assert (mono_method_signature (method)->pinvoke); 
                                CHECK_STACK (1);
                                --sp;
                                
                                CHECK_OPSIZE (6);
                                token = read32 (ip + 2);    
                                klass = (MonoClass *)mono_method_get_wrapper_data (method, token);

                                NEW_RETLOADA (cfg, ins);
                                handle_stobj (cfg, bblock, ins, *sp, ip, klass, FALSE, TRUE, FALSE);
                                
                                if (sp != stack_start)
                                        UNVERIFIED;
                                
                                MONO_INST_NEW (cfg, ins, OP_BR);
                                ins->cil_code = ip;
                                ins->inst_target_bb = end_bblock;
                                MONO_ADD_INS (bblock, ins);
                                link_bblock (cfg, bblock, end_bblock);
                                start_new_bblock = 1;
                                ip += 6;
                                break;
                        case CEE_MONO_CISINST:
                        case CEE_MONO_CCASTCLASS: {
                                int token;
                                CHECK_STACK (1);
                                --sp;
                                CHECK_OPSIZE (6);
                                token = read32 (ip + 2);
                                klass = (MonoClass *)mono_method_get_wrapper_data (method, token);
                                MONO_INST_NEW (cfg, ins, (ip [1] == CEE_MONO_CISINST) ? OP_CISINST : OP_CCASTCLASS);
                                ins->type = STACK_I4;
                                ins->inst_left = *sp;
                                ins->inst_newa_class = klass;
                                ins->cil_code = ip;
                                *sp++ = emit_tree (cfg, bblock, ins, ip + 6);
                                ip += 6;
                                break;
                        }
                        case CEE_MONO_SAVE_LMF:
                        case CEE_MONO_RESTORE_LMF:
#ifdef MONO_ARCH_HAVE_LMF_OPS
                                MONO_INST_NEW (cfg, ins, (ip [1] == CEE_MONO_SAVE_LMF) ? OP_SAVE_LMF : OP_RESTORE_LMF);
                                MONO_ADD_INS (bblock, ins);
                                cfg->need_lmf_area = TRUE;
#endif
                                ip += 2;
                                break;
                        case CEE_MONO_CLASSCONST:
                                CHECK_STACK_OVF (1);
                                CHECK_OPSIZE (6);
                                token = read32 (ip + 2);
                                NEW_CLASSCONST (cfg, ins, mono_method_get_wrapper_data (method, token));
                                ins->cil_code = ip;
                                *sp++ = ins;
                                ip += 6;
                                inline_costs += 10 * num_calls++;
                                break;
                        case CEE_MONO_NOT_TAKEN:
                                bblock->out_of_line = TRUE;
                                ip += 2;
                                break;
                        default:
                                g_error ("opcode 0x%02x 0x%02x not handled", MONO_CUSTOM_PREFIX, ip [1]);
                                break;
                        }
                        break;
                }
                case CEE_PREFIX1: {
                        CHECK_OPSIZE (2);
                        switch (ip [1]) {
                        case CEE_ARGLIST: {
                                /* somewhat similar to LDTOKEN */
                                MonoInst *addr, *vtvar;
                                CHECK_STACK_OVF (1);
                                vtvar = mono_compile_create_var (cfg, &mono_defaults.argumenthandle_class->byval_arg, OP_LOCAL); 

                                NEW_TEMPLOADA (cfg, addr, vtvar->inst_c0);
                                addr->cil_code = ip;
                                MONO_INST_NEW (cfg, ins, OP_ARGLIST);
                                ins->cil_code = ip;
                                ins->inst_left = addr;
                                MONO_ADD_INS (bblock, ins);
                                NEW_TEMPLOAD (cfg, ins, vtvar->inst_c0);
                                ins->cil_code = ip;
                                *sp++ = ins;
                                ip += 2;
                                break;
                        }
                        case CEE_CEQ:
                        case CEE_CGT:
                        case CEE_CGT_UN:
                        case CEE_CLT:
                        case CEE_CLT_UN: {
                                MonoInst *cmp;
                                CHECK_STACK (2);
                                /*
                                 * The following transforms:
                                 *    CEE_CEQ    into OP_CEQ
                                 *    CEE_CGT    into OP_CGT
                                 *    CEE_CGT_UN into OP_CGT_UN
                                 *    CEE_CLT    into OP_CLT
                                 *    CEE_CLT_UN into OP_CLT_UN
                                 */
                                MONO_INST_NEW (cfg, cmp, 256 + ip [1]);
                                
                                MONO_INST_NEW (cfg, ins, cmp->opcode);
                                sp -= 2;
                                cmp->inst_i0 = sp [0];
                                cmp->inst_i1 = sp [1];
                                cmp->cil_code = ip;
                                type_from_op (cmp);
                                CHECK_TYPE (cmp);
                                ins->cil_code = ip;
                                ins->type = STACK_I4;
                                ins->inst_i0 = cmp;
#if MONO_ARCH_SOFT_FLOAT
                                if (sp [0]->type == STACK_R8) {
                                        cmp->type = STACK_I4;
                                        *sp++ = emit_tree (cfg, bblock, cmp, ip + 2);
                                        ip += 2;
                                        break;
                                }
#endif
                                if ((sp [0]->type == STACK_I8) || ((sizeof (gpointer) == 8) && ((sp [0]->type == STACK_PTR) || (sp [0]->type == STACK_OBJ) || (sp [0]->type == STACK_MP))))
                                        cmp->opcode = OP_LCOMPARE;
                                else
                                        cmp->opcode = OP_COMPARE;
                                *sp++ = ins;
                                /* spill it to reduce the expression complexity
                                 * and workaround bug 54209 
                                 */
                                if (cmp->inst_left->type == STACK_I8) {
                                        --sp;
                                        *sp++ = emit_tree (cfg, bblock, ins, ip + 2);
                                }
                                ip += 2;
                                break;
                        }
                        case CEE_LDFTN: {
                                MonoInst *argconst;
                                int temp;

                                CHECK_STACK_OVF (1);
                                CHECK_OPSIZE (6);
                                n = read32 (ip + 2);
                                cmethod = mini_get_method (method, n, NULL, generic_context);
                                if (!cmethod)
                                        goto load_error;
                                mono_class_init (cmethod->klass);

                                if (mono_security_get_mode () == MONO_SECURITY_MODE_CAS) {
                                        if (check_linkdemand (cfg, method, cmethod, bblock, ip))
                                                INLINE_FAILURE;
                                        CHECK_CFG_EXCEPTION;
                                } else if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR) {
                                        ensure_method_is_allowed_to_call_method (cfg, method, cmethod, bblock, ip);
                                }

                                handle_loaded_temps (cfg, bblock, stack_start, sp);

                                NEW_METHODCONST (cfg, argconst, cmethod);
                                if (method->wrapper_type != MONO_WRAPPER_SYNCHRONIZED)
                                        temp = mono_emit_jit_icall (cfg, bblock, mono_ldftn, &argconst, ip);
                                else
                                        temp = mono_emit_jit_icall (cfg, bblock, mono_ldftn_nosync, &argconst, ip);
                                NEW_TEMPLOAD (cfg, *sp, temp);
                                sp ++;
                                
                                ip += 6;
                                inline_costs += 10 * num_calls++;
                                break;
                        }
                        case CEE_LDVIRTFTN: {
                                MonoInst *args [2];
                                int temp;

                                CHECK_STACK (1);
                                CHECK_OPSIZE (6);
                                n = read32 (ip + 2);
                                cmethod = mini_get_method (method, n, NULL, generic_context);
                                if (!cmethod)
                                        goto load_error;
                                mono_class_init (cmethod->klass);

                                if (mono_security_get_mode () == MONO_SECURITY_MODE_CAS) {
                                        if (check_linkdemand (cfg, method, cmethod, bblock, ip))
                                                INLINE_FAILURE;
                                        CHECK_CFG_EXCEPTION;
                                } else if (mono_security_get_mode () == MONO_SECURITY_MODE_CORE_CLR) {
                                        ensure_method_is_allowed_to_call_method (cfg, method, cmethod, bblock, ip);
                                }

                                handle_loaded_temps (cfg, bblock, stack_start, sp);

                                --sp;
                                args [0] = *sp;
                                NEW_METHODCONST (cfg, args [1], cmethod);
                                temp = mono_emit_jit_icall (cfg, bblock, mono_ldvirtfn, args, ip);
                                NEW_TEMPLOAD (cfg, *sp, temp);
                                sp ++;

                                ip += 6;
                                inline_costs += 10 * num_calls++;
                                break;
                        }
                        case CEE_LDARG:
                                CHECK_STACK_OVF (1);
                                CHECK_OPSIZE (4);
                                n = read16 (ip + 2);
                                CHECK_ARG (n);
                                NEW_ARGLOAD (cfg, ins, n);
                                LDARG_SOFT_FLOAT (cfg, ins, n, ip);
                                ins->cil_code = ip;
                                *sp++ = ins;
                                ip += 4;
                                break;
                        case CEE_LDARGA:
                                CHECK_STACK_OVF (1);
                                CHECK_OPSIZE (4);
                                n = read16 (ip + 2);
                                CHECK_ARG (n);
                                NEW_ARGLOADA (cfg, ins, n);
                                ins->cil_code = ip;
                                *sp++ = ins;
                                ip += 4;
                                break;
                        case CEE_STARG:
                                CHECK_STACK (1);
                                --sp;
                                handle_loaded_temps (cfg, bblock, stack_start, sp);
                                CHECK_OPSIZE (4);
                                n = read16 (ip + 2);
                                CHECK_ARG (n);
                                NEW_ARGSTORE (cfg, ins, n, *sp);
                                ins->cil_code = ip;
                                if (!dont_verify_stloc && target_type_is_incompatible (cfg, param_types [n], *sp))
                                        UNVERIFIED;
                                STARG_SOFT_FLOAT (cfg, ins, n, ip);
                                if (ins->opcode == CEE_STOBJ) {
                                        NEW_ARGLOADA (cfg, ins, n);
                                        handle_stobj (cfg, bblock, ins, *sp, ip, ins->klass, FALSE, FALSE, FALSE);
                                } else
                                        MONO_ADD_INS (bblock, ins);
                                ip += 4;
                                break;
                        case CEE_LDLOC:
                                CHECK_STACK_OVF (1);
                                CHECK_OPSIZE (4);
                                n = read16 (ip + 2);
                                CHECK_LOCAL (n);
                                NEW_LOCLOAD (cfg, ins, n);
                                LDLOC_SOFT_FLOAT (cfg, ins, n, ip);
                                ins->cil_code = ip;
                                *sp++ = ins;
                                ip += 4;
                                break;
                        case CEE_LDLOCA:
                                CHECK_STACK_OVF (1);
                                CHECK_OPSIZE (4);
                                n = read16 (ip + 2);
                                CHECK_LOCAL (n);
                                NEW_LOCLOADA (cfg, ins, n);
                                ins->cil_code = ip;
                                *sp++ = ins;
                                ip += 4;
                                break;
                        case CEE_STLOC:
                                CHECK_STACK (1);
                                --sp;
                                CHECK_OPSIZE (4);
                                n = read16 (ip + 2);
                                CHECK_LOCAL (n);
                                handle_loaded_temps (cfg, bblock, stack_start, sp);
                                NEW_LOCSTORE (cfg, ins, n, *sp);
                                if (!dont_verify_stloc && target_type_is_incompatible (cfg, header->locals [n], *sp))
                                        UNVERIFIED;
                                ins->cil_code = ip;
                                STLOC_SOFT_FLOAT (cfg, ins, n, ip);
                                if (ins->opcode == CEE_STOBJ) {
                                        NEW_LOCLOADA (cfg, ins, n);
                                        handle_stobj (cfg, bblock, ins, *sp, ip, ins->klass, FALSE, FALSE, FALSE);
                                } else
                                        MONO_ADD_INS (bblock, ins);
                                ip += 4;
                                inline_costs += 1;
                                break;
                        case CEE_LOCALLOC:
                                CHECK_STACK (1);
                                --sp;
                                if (sp != stack_start) 
                                        UNVERIFIED;
                                if (cfg->method != method) 
                                        /* 
                                         * Inlining this into a loop in a parent could lead to 
                                         * stack overflows which is different behavior than the
                                         * non-inlined case, thus disable inlining in this case.
                                         */
                                        goto inline_failure;
                                MONO_INST_NEW (cfg, ins, OP_LOCALLOC);
                                ins->inst_left = *sp;
                                ins->cil_code = ip;
                                ins->type = STACK_PTR;

                                cfg->flags |= MONO_CFG_HAS_ALLOCA;
                                if (header->init_locals)
                                        ins->flags |= MONO_INST_INIT;

                                *sp++ = ins;
                                ip += 2;
                                /* FIXME: set init flag if locals init is set in this method */
                                break;
                        case CEE_ENDFILTER: {
                                MonoExceptionClause *clause, *nearest;
                                int cc, nearest_num;

                                CHECK_STACK (1);
                                --sp;
                                if ((sp != stack_start) || (sp [0]->type != STACK_I4)) 
                                        UNVERIFIED;
                                MONO_INST_NEW (cfg, ins, OP_ENDFILTER);
                                ins->inst_left = *sp;
                                ins->cil_code = ip;
                                MONO_ADD_INS (bblock, ins);
                                start_new_bblock = 1;
                                ip += 2;

                                nearest = NULL;
                                nearest_num = 0;
                                for (cc = 0; cc < header->num_clauses; ++cc) {
                                        clause = &header->clauses [cc];
                                        if ((clause->flags & MONO_EXCEPTION_CLAUSE_FILTER) &&
                                                ((ip - header->code) > clause->data.filter_offset && (ip - header->code) <= clause->handler_offset) &&
                                            (!nearest || (clause->data.filter_offset < nearest->data.filter_offset))) {
                                                nearest = clause;
                                                nearest_num = cc;
                                        }
                                }
                                g_assert (nearest);
                                if ((ip - header->code) != nearest->handler_offset)
                                        UNVERIFIED;

                                break;
                        }
                        case CEE_UNALIGNED_:
                                ins_flag |= MONO_INST_UNALIGNED;
                                /* FIXME: record alignment? we can assume 1 for now */
                                CHECK_OPSIZE (3);
                                ip += 3;
                                break;
                        case CEE_VOLATILE_:
                                ins_flag |= MONO_INST_VOLATILE;
                                ip += 2;
                                break;
                        case CEE_TAIL_:
                                ins_flag   |= MONO_INST_TAILCALL;
                                cfg->flags |= MONO_CFG_HAS_TAIL;
                                /* Can't inline tail calls at this time */
                                inline_costs += 100000;
                                ip += 2;
                                break;
                        case CEE_INITOBJ:
                                CHECK_STACK (1);
                                --sp;
                                CHECK_OPSIZE (6);
                                token = read32 (ip + 2);
                                klass = mini_get_class (method, token, generic_context);
                                CHECK_TYPELOAD (klass);
                                if (MONO_TYPE_IS_REFERENCE (&klass->byval_arg)) {
                                        MonoInst *store, *load;
                                        NEW_PCONST (cfg, load, NULL);
                                        load->cil_code = ip;
                                        load->type = STACK_OBJ;
                                        load->klass = klass;
                                        MONO_INST_NEW (cfg, store, CEE_STIND_REF);
                                        store->cil_code = ip;
                                        handle_loaded_temps (cfg, bblock, stack_start, sp);
                                        MONO_ADD_INS (bblock, store);
                                        store->inst_i0 = sp [0];
                                        store->inst_i1 = load;
                                } else {
                                        handle_initobj (cfg, bblock, *sp, NULL, klass, stack_start, sp);
                                }
                                ip += 6;
                                inline_costs += 1;
                                break;
                        case CEE_CONSTRAINED_:
                                /* FIXME: implement */
                                CHECK_OPSIZE (6);
                                token = read32 (ip + 2);
                                constrained_call = mono_class_get_full (image, token, generic_context);
                                CHECK_TYPELOAD (constrained_call);
                                ip += 6;
                                break;
                        case CEE_CPBLK:
                        case CEE_INITBLK: {
                                MonoInst *iargs [3];
                                CHECK_STACK (3);
                                sp -= 3;
                                if ((cfg->opt & MONO_OPT_INTRINS) && (ip [1] == CEE_CPBLK) && (sp [2]->opcode == OP_ICONST) && ((n = sp [2]->inst_c0) <= sizeof (gpointer) * 5)) {
                                        MonoInst *copy;
                                        MONO_INST_NEW (cfg, copy, OP_MEMCPY);
                                        copy->inst_left = sp [0];
                                        copy->inst_right = sp [1];
                                        copy->cil_code = ip;
                                        copy->backend.size = n;
                                        MONO_ADD_INS (bblock, copy);
                                        ip += 2;
                                        break;
                                }
                                iargs [0] = sp [0];
                                iargs [1] = sp [1];
                                iargs [2] = sp [2];
                                handle_loaded_temps (cfg, bblock, stack_start, sp);
                                if (ip [1] == CEE_CPBLK) {
                                        MonoMethod *memcpy_method = get_memcpy_method ();
                                        mono_emit_method_call_spilled (cfg, bblock, memcpy_method, memcpy_method->signature, iargs, ip, NULL);
                                } else {
                                        MonoMethod *memset_method = get_memset_method ();
                                        mono_emit_method_call_spilled (cfg, bblock, memset_method, memset_method->signature, iargs, ip, NULL);
                                }
                                ip += 2;
                                inline_costs += 1;
                                break;
                        }
                        case CEE_NO_:
                                CHECK_OPSIZE (3);
                                if (ip [2] & 0x1)
                                        ins_flag |= MONO_INST_NOTYPECHECK;
                                if (ip [2] & 0x2)
                                        ins_flag |= MONO_INST_NORANGECHECK;
                                /* we ignore the no-nullcheck for now since we
                                 * really do it explicitly only when doing callvirt->call
                                 */
                                ip += 3;
                                break;
                        case CEE_RETHROW: {
                                MonoInst *load;
                                int handler_offset = -1;

                                for (i = 0; i < header->num_clauses; ++i) {
                                        MonoExceptionClause *clause = &header->clauses [i];
                                        if (MONO_OFFSET_IN_HANDLER (clause, ip - header->code) && !(clause->flags & MONO_EXCEPTION_CLAUSE_FINALLY))
                                                handler_offset = clause->handler_offset;
                                }

                                bblock->flags |= BB_EXCEPTION_UNSAFE;

                                g_assert (handler_offset != -1);

                                NEW_TEMPLOAD (cfg, load, mono_find_exvar_for_offset (cfg, handler_offset)->inst_c0);
                                load->cil_code = ip;
                                MONO_INST_NEW (cfg, ins, OP_RETHROW);
                                ins->inst_left = load;
                                ins->cil_code = ip;
                                MONO_ADD_INS (bblock, ins);
                                sp = stack_start;
                                link_bblock (cfg, bblock, end_bblock);
                                start_new_bblock = 1;
                                ip += 2;
                                break;
                        }
                        case CEE_SIZEOF:
                                CHECK_STACK_OVF (1);
                                CHECK_OPSIZE (6);
                                token = read32 (ip + 2);
                                /* FIXXME: handle generics. */
                                if (mono_metadata_token_table (token) == MONO_TABLE_TYPESPEC) {
                                        MonoType *type = mono_type_create_from_typespec (image, token);
                                        token = mono_type_size (type, &ialign);
                                } else {
                                        MonoClass *klass = mono_class_get_full (image, token, generic_context);
                                        CHECK_TYPELOAD (klass);
                                        mono_class_init (klass);
                                        token = mono_class_value_size (klass, &align);
                                }
                                NEW_ICONST (cfg, ins, token);
                                ins->cil_code = ip;
                                *sp++= ins;
                                ip += 6;
                                break;
                        case CEE_REFANYTYPE:
                                CHECK_STACK (1);
                                MONO_INST_NEW (cfg, ins, OP_REFANYTYPE);
                                --sp;
                                ins->type = STACK_MP;
                                ins->inst_left = *sp;
                                ins->type = STACK_VTYPE;
                                ins->klass = mono_defaults.typehandle_class;
                                ins->cil_code = ip;
                                ip += 2;
                                *sp++ = ins;
                                break;
                        case CEE_READONLY_:
                                ip += 2;
                                break;
                        default:
                                g_error ("opcode 0xfe 0x%02x not handled", ip [1]);
                        }
                        break;
                }
                default:
                        g_error ("opcode 0x%02x not handled", *ip);
                }
        }
        if (start_new_bblock != 1)
                UNVERIFIED;

        bblock->cil_length = ip - bblock->cil_code;
        bblock->next_bb = end_bblock;

        if (cfg->method == method && cfg->domainvar) {
                MonoInst *store;
                MonoInst *get_domain;
                
                if (! (get_domain = mono_arch_get_domain_intrinsic (cfg))) {
                        MonoCallInst *call;
                        
                        MONO_INST_NEW_CALL (cfg, call, CEE_CALL);
                        call->signature = helper_sig_domain_get;
                        call->inst.type = STACK_PTR;
                        call->fptr = mono_domain_get;
                        get_domain = (MonoInst*)call;
                }
                
                NEW_TEMPSTORE (cfg, store, cfg->domainvar->inst_c0, get_domain);
                MONO_ADD_INS (init_localsbb, store);
        }

        if (cfg->method == method && cfg->got_var)
                mono_emit_load_got_addr (cfg);

        if (header->init_locals) {
                MonoInst *store;
                for (i = 0; i < header->num_locals; ++i) {
                        MonoType *ptype = header->locals [i];
                        int t = ptype->type;
                        if (t == MONO_TYPE_VALUETYPE && ptype->data.klass->enumtype)
                                t = ptype->data.klass->enum_basetype->type;
                        if (ptype->byref) {
                                NEW_PCONST (cfg, ins, NULL);
                                NEW_LOCSTORE (cfg, store, i, ins);
                                MONO_ADD_INS (init_localsbb, store);
                        } else if (t >= MONO_TYPE_BOOLEAN && t <= MONO_TYPE_U4) {
                                NEW_ICONST (cfg, ins, 0);
                                NEW_LOCSTORE (cfg, store, i, ins);
                                MONO_ADD_INS (init_localsbb, store);
                        } else if (t == MONO_TYPE_I8 || t == MONO_TYPE_U8) {
                                MONO_INST_NEW (cfg, ins, OP_I8CONST);
                                ins->type = STACK_I8;
                                ins->inst_l = 0;
                                NEW_LOCSTORE (cfg, store, i, ins);
                                MONO_ADD_INS (init_localsbb, store);
                        } else if (t == MONO_TYPE_R4 || t == MONO_TYPE_R8) {
#ifdef MONO_ARCH_SOFT_FLOAT
                                /* FIXME: handle init of R4 */
#else
                                MONO_INST_NEW (cfg, ins, OP_R8CONST);
                                ins->type = STACK_R8;
                                ins->inst_p0 = (void*)&r8_0;
                                NEW_LOCSTORE (cfg, store, i, ins);
                                MONO_ADD_INS (init_localsbb, store);
#endif
                        } else if ((t == MONO_TYPE_VALUETYPE) || (t == MONO_TYPE_TYPEDBYREF) ||
                                   ((t == MONO_TYPE_GENERICINST) && mono_type_generic_inst_is_valuetype (ptype))) {
                                NEW_LOCLOADA (cfg, ins, i);
                                handle_initobj (cfg, init_localsbb, ins, NULL, mono_class_from_mono_type (ptype), NULL, NULL);
                        } else {
                                NEW_PCONST (cfg, ins, NULL);
                                NEW_LOCSTORE (cfg, store, i, ins);
                                MONO_ADD_INS (init_localsbb, store);
                        }
                }
        }

        /* resolve backward branches in the middle of an existing basic block */
        for (tmp = bb_recheck; tmp; tmp = tmp->next) {
                bblock = tmp->data;
                /*g_print ("need recheck in %s at IL_%04x\n", method->name, bblock->cil_code - header->code);*/
                tblock = find_previous (cfg->cil_offset_to_bb, header->code_size, start_bblock, bblock->cil_code);
                if (tblock != start_bblock) {
                        int l;
                        split_bblock (cfg, tblock, bblock);
                        l = bblock->cil_code - header->code;
                        bblock->cil_length = tblock->cil_length - l;
                        tblock->cil_length = l;
                } else {
                        g_print ("recheck failed.\n");
                }
        }

        if (cfg->method == method) {
                MonoBasicBlock *bb;
                for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
                        bb->region = mono_find_block_region (cfg, bb->real_offset);
                        if (cfg->spvars)
                                mono_create_spvar_for_region (cfg, bb->region);
                        if (cfg->verbose_level > 2)
                                g_print ("REGION BB%d IL_%04x ID_%08X\n", bb->block_num, bb->real_offset, bb->region);
                }
        }

        g_slist_free (class_inits);
        dont_inline = g_list_remove (dont_inline, method);

        if (inline_costs < 0) {
                char *mname;

                /* Method is too large */
                mname = mono_method_full_name (method, TRUE);
                cfg->exception_type = MONO_EXCEPTION_INVALID_PROGRAM;
                cfg->exception_message = g_strdup_printf ("Method %s is too complex.", mname);
                g_free (mname);
                return -1;
        }

        return inline_costs;

 exception_exit:
        g_assert (cfg->exception_type != MONO_EXCEPTION_NONE);
        g_slist_free (class_inits);
        dont_inline = g_list_remove (dont_inline, method);
        return -1;

 inline_failure:
        g_slist_free (class_inits);
        dont_inline = g_list_remove (dont_inline, method);
        return -1;

 load_error:
        g_slist_free (class_inits);
        dont_inline = g_list_remove (dont_inline, method);
        cfg->exception_type = MONO_EXCEPTION_TYPE_LOAD;
        return -1;

 unverified:
        g_slist_free (class_inits);
        dont_inline = g_list_remove (dont_inline, method);
        cfg->exception_type = MONO_EXCEPTION_INVALID_PROGRAM;
        cfg->exception_message = g_strdup_printf ("Invalid IL code in %s: %s\n",
                 mono_method_full_name (method, TRUE), mono_disasm_code_one (NULL, method, ip, NULL));
        return -1;
}

void
mono_print_tree (MonoInst *tree) {
        int arity;

        if (!tree)
                return;

        arity = mono_burg_arity [tree->opcode];

        printf (" %s%s", arity?"(":"",  mono_inst_name (tree->opcode));

        switch (tree->opcode) {
        case OP_ICONST:
                printf ("[%d]", (int)tree->inst_c0);
                break;
        case OP_I8CONST:
                printf ("[%lld]", (long long)tree->inst_l);
                break;
        case OP_R8CONST:
                printf ("[%f]", *(double*)tree->inst_p0);
                break;
        case OP_R4CONST:
                printf ("[%f]", *(float*)tree->inst_p0);
                break;
        case OP_ARG:
        case OP_LOCAL:
                printf ("[%d]", (int)tree->inst_c0);
                break;
        case OP_REGOFFSET:
                if (tree->inst_offset < 0)
                        printf ("[-0x%x(%s)]", (int)(-tree->inst_offset), mono_arch_regname (tree->inst_basereg));
                else
                        printf ("[0x%x(%s)]", (int)(tree->inst_offset), mono_arch_regname (tree->inst_basereg));
                break;
        case OP_REGVAR:
                printf ("[%s]", mono_arch_regname (tree->dreg));
                break;
        case CEE_NEWARR:
                printf ("[%s]",  tree->inst_newa_class->name);
                mono_print_tree (tree->inst_newa_len);
                break;
        case CEE_CALL:
        case CEE_CALLVIRT:
        case OP_FCALL:
        case OP_FCALLVIRT:
        case OP_LCALL:
        case OP_LCALLVIRT:
        case OP_VCALL:
        case OP_VCALLVIRT:
        case OP_VOIDCALL:
        case OP_VOIDCALLVIRT: {
                MonoCallInst *call = (MonoCallInst*)tree;
                if (call->method)
                        printf ("[%s]", call->method->name);
                else if (call->fptr) {
                        MonoJitICallInfo *info = mono_find_jit_icall_by_addr (call->fptr);
                        if (info)
                                printf ("[%s]", info->name);
                }
                break;
        }
        case OP_PHI: {
                int i;
                printf ("[%d (", (int)tree->inst_c0);
                for (i = 0; i < tree->inst_phi_args [0]; i++) {
                        if (i)
                                printf (", ");
                        printf ("%d", tree->inst_phi_args [i + 1]);
                }
                printf (")]");
                break;
        }
        case OP_RENAME:
        case OP_RETARG:
        case OP_NOP:
        case OP_JMP:
        case OP_BREAK:
                break;
        case OP_LOAD_MEMBASE:
        case OP_LOADI4_MEMBASE:
        case OP_LOADU4_MEMBASE:
        case OP_LOADU1_MEMBASE:
        case OP_LOADI1_MEMBASE:
        case OP_LOADU2_MEMBASE:
        case OP_LOADI2_MEMBASE:
                printf ("[%s] <- [%s + 0x%x]", mono_arch_regname (tree->dreg), mono_arch_regname (tree->inst_basereg), (int)tree->inst_offset);
                break;
        case OP_BR:
        case OP_CALL_HANDLER:
                printf ("[B%d]", tree->inst_target_bb->block_num);
                break;
        case CEE_SWITCH:
        case CEE_ISINST:
        case CEE_CASTCLASS:
        case OP_OUTARG:
        case OP_CALL_REG:
        case OP_FCALL_REG:
        case OP_LCALL_REG:
        case OP_VCALL_REG:
        case OP_VOIDCALL_REG:
                mono_print_tree (tree->inst_left);
                break;
        case CEE_BNE_UN:
        case CEE_BEQ:
        case CEE_BLT:
        case CEE_BLT_UN:
        case CEE_BGT:
        case CEE_BGT_UN:
        case CEE_BGE:
        case CEE_BGE_UN:
        case CEE_BLE:
        case CEE_BLE_UN:
                printf ("[B%dB%d]", tree->inst_true_bb->block_num, tree->inst_false_bb->block_num);
                mono_print_tree (tree->inst_left);
                break;
        default:
                if (!mono_arch_print_tree(tree, arity)) {
                        if (arity) {
                                mono_print_tree (tree->inst_left);
                                if (arity > 1)
                                        mono_print_tree (tree->inst_right);
                        }
                }
                break;
        }

        if (arity)
                printf (")");
}

void
mono_print_tree_nl (MonoInst *tree)
{
        mono_print_tree (tree);
        printf ("\n");
}

static void
create_helper_signature (void)
{
        helper_sig_domain_get = mono_create_icall_signature ("ptr");
        helper_sig_class_init_trampoline = mono_create_icall_signature ("void");
}

gconstpointer
mono_icall_get_wrapper (MonoJitICallInfo* callinfo)
{
        char *name;
        MonoMethod *wrapper;
        gconstpointer trampoline;
        MonoDomain *domain = mono_get_root_domain ();
        
        if (callinfo->wrapper) {
                return callinfo->wrapper;
        }

        if (callinfo->trampoline)
                return callinfo->trampoline;

        /* 
         * We use the lock on the root domain instead of the JIT lock to protect 
         * callinfo->trampoline, since we do a lot of stuff inside the critical section.
         */
        mono_domain_lock (domain);

        if (callinfo->trampoline) {
                mono_domain_unlock (domain);
                return callinfo->trampoline;
        }

        name = g_strdup_printf ("__icall_wrapper_%s", callinfo->name);
        wrapper = mono_marshal_get_icall_wrapper (callinfo->sig, name, callinfo->func);
        g_free (name);

        trampoline = mono_create_ftnptr (domain, mono_create_jit_trampoline_in_domain (domain, wrapper));
        mono_register_jit_icall_wrapper (callinfo, trampoline);

        callinfo->trampoline = trampoline;

        mono_domain_unlock (domain);
        
        return callinfo->trampoline;
}

static void
mono_init_trampolines (void)
{
        mono_trampoline_code [MONO_TRAMPOLINE_GENERIC] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_GENERIC);
        mono_trampoline_code [MONO_TRAMPOLINE_JUMP] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_JUMP);
        mono_trampoline_code [MONO_TRAMPOLINE_CLASS_INIT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_CLASS_INIT);
#ifdef MONO_ARCH_HAVE_PIC_AOT
        mono_trampoline_code [MONO_TRAMPOLINE_AOT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_AOT);
        mono_trampoline_code [MONO_TRAMPOLINE_AOT_PLT] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_AOT_PLT);
#endif
#ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
        mono_trampoline_code [MONO_TRAMPOLINE_DELEGATE] = mono_arch_create_trampoline_code (MONO_TRAMPOLINE_DELEGATE);
#endif
}

static void
mono_init_exceptions (void)
{
#ifndef CUSTOM_EXCEPTION_HANDLING
        mono_arch_get_restore_context ();
        mono_arch_get_call_filter ();
        mono_arch_get_throw_exception ();
        mono_arch_get_rethrow_exception ();
#endif
}

guint8 *
mono_get_trampoline_code (MonoTrampolineType tramp_type)
{
        return mono_trampoline_code [tramp_type];
}

gpointer
mono_create_class_init_trampoline (MonoVTable *vtable)
{
        gpointer code, ptr;

        /* previously created trampoline code */
        mono_domain_lock (vtable->domain);
        ptr = 
                g_hash_table_lookup (vtable->domain->class_init_trampoline_hash,
                                                                  vtable);
        mono_domain_unlock (vtable->domain);
        if (ptr)
                return ptr;

#ifdef MONO_ARCH_HAVE_CREATE_SPECIFIC_TRAMPOLINE
        code = mono_arch_create_specific_trampoline (vtable, MONO_TRAMPOLINE_CLASS_INIT, vtable->domain, NULL);
#else
        code = mono_arch_create_class_init_trampoline (vtable);
#endif

        ptr = mono_create_ftnptr (vtable->domain, code);

        /* store trampoline address */
        mono_domain_lock (vtable->domain);
        g_hash_table_insert (vtable->domain->class_init_trampoline_hash,
                                                          vtable, ptr);
        mono_domain_unlock (vtable->domain);

        mono_jit_lock ();
        if (!class_init_hash_addr)
                class_init_hash_addr = g_hash_table_new (NULL, NULL);
        g_hash_table_insert (class_init_hash_addr, ptr, vtable);
        mono_jit_unlock ();

        return ptr;
}

gpointer
mono_create_jump_trampoline (MonoDomain *domain, MonoMethod *method, 
                                                         gboolean add_sync_wrapper)
{
        MonoJitInfo *ji;
        gpointer code;
#ifdef MONO_ARCH_HAVE_CREATE_SPECIFIC_TRAMPOLINE
        guint32 code_size;
#endif

        if (add_sync_wrapper && method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
                return mono_create_jump_trampoline (domain, mono_marshal_get_synchronized_wrapper (method), FALSE);

        code = mono_jit_find_compiled_method (domain, method);
        if (code)
                return code;

        mono_domain_lock (domain);
        code = g_hash_table_lookup (domain->jump_trampoline_hash, method);
        mono_domain_unlock (domain);
        if (code)
                return code;

#ifdef MONO_ARCH_HAVE_CREATE_SPECIFIC_TRAMPOLINE
        code = mono_arch_create_specific_trampoline (method, MONO_TRAMPOLINE_JUMP, mono_domain_get (), &code_size);

        mono_domain_lock (domain);
        ji = mono_mempool_alloc0 (domain->mp, sizeof (MonoJitInfo));
        mono_domain_unlock (domain);
        ji->code_start = code;
        ji->code_size = code_size;
        ji->method = method;
#else
        ji = mono_arch_create_jump_trampoline (method);
#endif

        /*
         * mono_delegate_ctor needs to find the method metadata from the 
         * trampoline address, so we save it here.
         */

        mono_jit_info_table_add (domain, ji);

        mono_domain_lock (domain);
        g_hash_table_insert (domain->jump_trampoline_hash, method, ji->code_start);
        mono_domain_unlock (domain);

        return ji->code_start;
}

static gpointer
mono_create_jit_trampoline_in_domain (MonoDomain *domain, MonoMethod *method)
{
        gpointer tramp;

        mono_domain_lock (domain);
        tramp = g_hash_table_lookup (domain->jit_trampoline_hash, method);
        mono_domain_unlock (domain);
        if (tramp)
                return tramp;

        if (method->iflags & METHOD_IMPL_ATTRIBUTE_SYNCHRONIZED)
                return mono_create_jit_trampoline (mono_marshal_get_synchronized_wrapper (method));

#ifdef MONO_ARCH_HAVE_CREATE_SPECIFIC_TRAMPOLINE
        tramp =  mono_arch_create_specific_trampoline (method, MONO_TRAMPOLINE_GENERIC, domain, NULL);
#else
        tramp = mono_arch_create_jit_trampoline (method);
#endif
        
        mono_domain_lock (domain);
        g_hash_table_insert (domain->jit_trampoline_hash, method, tramp);
        mono_domain_unlock (domain);

        mono_jit_stats.method_trampolines++;

        return tramp;
}       

gpointer
mono_create_jit_trampoline (MonoMethod *method)
{
        return mono_create_jit_trampoline_in_domain (mono_domain_get (), method);
}

#ifdef MONO_ARCH_HAVE_CREATE_TRAMPOLINE_FROM_TOKEN
gpointer
mono_create_jit_trampoline_from_token (MonoImage *image, guint32 token)
{
        gpointer tramp;

        MonoDomain *domain = mono_domain_get ();
        guint8 *buf, *start;

        mono_domain_lock (domain);
        buf = start = mono_code_manager_reserve (domain->code_mp, 2 * sizeof (gpointer));
        mono_domain_unlock (domain);

        *(gpointer*)(gpointer)buf = image;
        buf += sizeof (gpointer);
        *(guint32*)(gpointer)buf = token;

        tramp = mono_arch_create_specific_trampoline (start, MONO_TRAMPOLINE_AOT, domain, NULL);

        mono_jit_stats.method_trampolines++;

        return tramp;
}       
#endif

static gpointer
mono_create_delegate_trampoline (MonoClass *klass)
{
#ifdef MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE
        MonoDomain *domain = mono_domain_get ();
        gpointer code, ptr;
        guint32 code_size;

        mono_domain_lock (domain);
        ptr = g_hash_table_lookup (domain->delegate_trampoline_hash, klass);
        mono_domain_unlock (domain);
        if (ptr)
                return ptr;

    code = mono_arch_create_specific_trampoline (klass, MONO_TRAMPOLINE_DELEGATE, mono_domain_get (), &code_size);

        ptr = mono_create_ftnptr (domain, code);

        /* store trampoline address */
        mono_domain_lock (domain);
        g_hash_table_insert (domain->delegate_trampoline_hash,
                                                          klass, ptr);
        mono_domain_unlock (domain);

        return ptr;
#else
        return NULL;
#endif
}

MonoVTable*
mono_find_class_init_trampoline_by_addr (gconstpointer addr)
{
        MonoVTable *res;

        mono_jit_lock ();
        if (class_init_hash_addr)
                res = g_hash_table_lookup (class_init_hash_addr, addr);
        else
                res = NULL;
        mono_jit_unlock ();
        return res;
}

static void
mono_dynamic_code_hash_insert (MonoDomain *domain, MonoMethod *method, MonoJitDynamicMethodInfo *ji)
{
        if (!domain->dynamic_code_hash)
                domain->dynamic_code_hash = g_hash_table_new (NULL, NULL);
        g_hash_table_insert (domain->dynamic_code_hash, method, ji);
}

static MonoJitDynamicMethodInfo*
mono_dynamic_code_hash_lookup (MonoDomain *domain, MonoMethod *method)
{
        MonoJitDynamicMethodInfo *res;

        if (domain->dynamic_code_hash)
                res = g_hash_table_lookup (domain->dynamic_code_hash, method);
        else
                res = NULL;
        return res;
}

typedef struct {
        MonoClass *vtype;
        GList *active;
        GSList *slots;
} StackSlotInfo;

static inline GSList*
g_slist_prepend_mempool (MonoMemPool *mp, GSList   *list,
                                                 gpointer  data)
{
  GSList *new_list;

  new_list = mono_mempool_alloc (mp, sizeof (GSList));
  new_list->data = data;
  new_list->next = list;

  return new_list;
}

/*
 *  mono_allocate_stack_slots_full:
 *
 *  Allocate stack slots for all non register allocated variables using a
 * linear scan algorithm.
 * Returns: an array of stack offsets.
 * STACK_SIZE is set to the amount of stack space needed.
 * STACK_ALIGN is set to the alignment needed by the locals area.
 */
gint32*
mono_allocate_stack_slots_full (MonoCompile *m, gboolean backward, guint32 *stack_size, guint32 *stack_align)
{
        int i, slot, offset, size;
        guint32 align;
        MonoMethodVar *vmv;
        MonoInst *inst;
        gint32 *offsets;
        GList *vars = NULL, *l;
        StackSlotInfo *scalar_stack_slots, *vtype_stack_slots, *slot_info;
        MonoType *t;
        int nvtypes;

        scalar_stack_slots = mono_mempool_alloc0 (m->mempool, sizeof (StackSlotInfo) * MONO_TYPE_PINNED);
        vtype_stack_slots = NULL;
        nvtypes = 0;

        offsets = mono_mempool_alloc (m->mempool, sizeof (gint32) * m->num_varinfo);
        for (i = 0; i < m->num_varinfo; ++i)
                offsets [i] = -1;

        for (i = m->locals_start; i < m->num_varinfo; i++) {
                inst = m->varinfo [i];
                vmv = MONO_VARINFO (m, i);

                if ((inst->flags & MONO_INST_IS_DEAD) || inst->opcode == OP_REGVAR || inst->opcode == OP_REGOFFSET)
                        continue;

                vars = g_list_prepend (vars, vmv);
        }

        vars = mono_varlist_sort (m, vars, 0);
        offset = 0;
        *stack_align = 0;
        for (l = vars; l; l = l->next) {
                vmv = l->data;
                inst = m->varinfo [vmv->idx];

                /* inst->backend.is_pinvoke indicates native sized value types, this is used by the
                * pinvoke wrappers when they call functions returning structures */
                if (inst->backend.is_pinvoke && MONO_TYPE_ISSTRUCT (inst->inst_vtype) && inst->inst_vtype->type != MONO_TYPE_TYPEDBYREF)
                        size = mono_class_native_size (inst->inst_vtype->data.klass, &align);
                else {
                        int ialign;

                        size = mono_type_size (inst->inst_vtype, &ialign);
                        align = ialign;
                }

                t = mono_type_get_underlying_type (inst->inst_vtype);
                if (t->byref) {
                        slot_info = &scalar_stack_slots [MONO_TYPE_I];
                } else {
                        switch (t->type) {
                        case MONO_TYPE_GENERICINST:
                                if (!mono_type_generic_inst_is_valuetype (t)) {
                                        slot_info = &scalar_stack_slots [t->type];
                                        break;
                                }
                                /* Fall through */
                        case MONO_TYPE_VALUETYPE:
                                if (!vtype_stack_slots)
                                        vtype_stack_slots = mono_mempool_alloc0 (m->mempool, sizeof (StackSlotInfo) * 256);
                                for (i = 0; i < nvtypes; ++i)
                                        if (t->data.klass == vtype_stack_slots [i].vtype)
                                                break;
                                if (i < nvtypes)
                                        slot_info = &vtype_stack_slots [i];
                                else {
                                        g_assert (nvtypes < 256);
                                        vtype_stack_slots [nvtypes].vtype = t->data.klass;
                                        slot_info = &vtype_stack_slots [nvtypes];
                                        nvtypes ++;
                                }
                                break;
                        case MONO_TYPE_CLASS:
                        case MONO_TYPE_OBJECT:
                        case MONO_TYPE_ARRAY:
                        case MONO_TYPE_SZARRAY:
                        case MONO_TYPE_STRING:
                        case MONO_TYPE_PTR:
                        case MONO_TYPE_I:
                        case MONO_TYPE_U:
#if SIZEOF_VOID_P == 4
                        case MONO_TYPE_I4:
#else
                        case MONO_TYPE_I8:
#endif
                                /* Share non-float stack slots of the same size */
                                slot_info = &scalar_stack_slots [MONO_TYPE_CLASS];
                                break;
                        default:
                                slot_info = &scalar_stack_slots [t->type];
                        }
                }

                slot = 0xffffff;
                if (m->comp_done & MONO_COMP_LIVENESS) {
                        //printf ("START  %2d %08x %08x\n",  vmv->idx, vmv->range.first_use.abs_pos, vmv->range.last_use.abs_pos);
                        
                        /* expire old intervals in active */
                        while (slot_info->active) {
                                MonoMethodVar *amv = (MonoMethodVar *)slot_info->active->data;

                                if (amv->range.last_use.abs_pos > vmv->range.first_use.abs_pos)
                                        break;

                                //printf ("EXPIR  %2d %08x %08x C%d R%d\n", amv->idx, amv->range.first_use.abs_pos, amv->range.last_use.abs_pos, amv->spill_costs, amv->reg);

                                slot_info->active = g_list_delete_link (slot_info->active, slot_info->active);
                                slot_info->slots = g_slist_prepend_mempool (m->mempool, slot_info->slots, GINT_TO_POINTER (offsets [amv->idx]));
                        }

                        /* 
                         * This also handles the case when the variable is used in an
                         * exception region, as liveness info is not computed there.
                         */
                        /* 
                         * FIXME: All valuetypes are marked as INDIRECT because of LDADDR
                         * opcodes.
                         */
                        if (! (inst->flags & (MONO_INST_VOLATILE|MONO_INST_INDIRECT))) {
                                if (slot_info->slots) {
                                        slot = GPOINTER_TO_INT (slot_info->slots->data);

                                        slot_info->slots = slot_info->slots->next;
                                }

                                slot_info->active = mono_varlist_insert_sorted (m, slot_info->active, vmv, TRUE);
                        }
                }

                {
                        static int count = 0;
                        count ++;

                        /*
                        if (count == atoi (getenv ("COUNT")))
                                printf ("LAST: %s\n", mono_method_full_name (m->method, TRUE));
                        if (count > atoi (getenv ("COUNT")))
                                slot = 0xffffff;
                        else {
                                mono_print_tree_nl (inst);
                                }
                        */
                }
                if (slot == 0xffffff) {
                        /*
                         * Allways allocate valuetypes to sizeof (gpointer) to allow more
                         * efficient copying (and to work around the fact that OP_MEMCPY
                         * and OP_MEMSET ignores alignment).
                         */
                        if (MONO_TYPE_ISSTRUCT (t))
                                align = sizeof (gpointer);

                        if (backward) {
                                offset += size;
                                offset += align - 1;
                                offset &= ~(align - 1);
                                slot = offset;
                        }
                        else {
                                offset += align - 1;
                                offset &= ~(align - 1);
                                slot = offset;
                                offset += size;
                        }

                        if (*stack_align == 0)
                                *stack_align = align;
                }

                offsets [vmv->idx] = slot;
        }
        g_list_free (vars);
        for (i = 0; i < MONO_TYPE_PINNED; ++i) {
                if (scalar_stack_slots [i].active)
                        g_list_free (scalar_stack_slots [i].active);
        }
        for (i = 0; i < nvtypes; ++i) {
                if (vtype_stack_slots [i].active)
                        g_list_free (vtype_stack_slots [i].active);
        }

        mono_jit_stats.locals_stack_size += offset;

        *stack_size = offset;
        return offsets;
}

gint32*
mono_allocate_stack_slots (MonoCompile *m, guint32 *stack_size, guint32 *stack_align)
{
        return mono_allocate_stack_slots_full (m, TRUE, stack_size, stack_align);
}

void
mono_register_opcode_emulation (int opcode, const char *name, const char *sigstr, gpointer func, gboolean no_throw)
{
        MonoJitICallInfo *info;
        MonoMethodSignature *sig = mono_create_icall_signature (sigstr);

        if (!emul_opcode_map)
                emul_opcode_map = g_new0 (MonoJitICallInfo*, OP_LAST + 1);

        g_assert (!sig->hasthis);
        g_assert (sig->param_count < 3);

        info = mono_register_jit_icall (func, name, sig, no_throw);

        emul_opcode_map [opcode] = info;
}

static void
register_icall (gpointer func, const char *name, const char *sigstr, gboolean save)
{
        MonoMethodSignature *sig;

        if (sigstr)
                sig = mono_create_icall_signature (sigstr);
        else
                sig = NULL;

        mono_register_jit_icall (func, name, sig, save);
}

static void
decompose_foreach (MonoInst *tree, gpointer data) 
{
        static MonoJitICallInfo *newarr_info = NULL;
        static MonoJitICallInfo *newarr_specific_info = NULL;
        MonoJitICallInfo *info;
        int i;

        switch (tree->opcode) {
        case CEE_NEWARR: {
                MonoCompile *cfg = data;
                MonoInst *iargs [3];

                if (!newarr_info) {
                        newarr_info = mono_find_jit_icall_by_addr (mono_array_new);
                        g_assert (newarr_info);
                        newarr_specific_info = mono_find_jit_icall_by_addr (mono_array_new_specific);
                        g_assert (newarr_specific_info);
                }

                if (cfg->opt & MONO_OPT_SHARED) {
                        NEW_DOMAINCONST (cfg, iargs [0]);
                        NEW_CLASSCONST (cfg, iargs [1], tree->inst_newa_class);
                        iargs [2] = tree->inst_newa_len;

                        info = newarr_info;
                }
                else {
                        MonoVTable *vtable = mono_class_vtable (cfg->domain, mono_array_class_get (tree->inst_newa_class, 1));

                        NEW_VTABLECONST (cfg, iargs [0], vtable);
                        iargs [1] = tree->inst_newa_len;

                        info = newarr_specific_info;
                }

                mono_emulate_opcode (cfg, tree, iargs, info);

                /* Need to decompose arguments after the the opcode is decomposed */
                for (i = 0; i < info->sig->param_count; ++i)
                        dec_foreach (iargs [i], cfg);
                break;
        }
#ifdef MONO_ARCH_SOFT_FLOAT
        case OP_FBEQ:
        case OP_FBGE:
        case OP_FBGT:
        case OP_FBLE:
        case OP_FBLT:
        case OP_FBNE_UN:
        case OP_FBGE_UN:
        case OP_FBGT_UN:
        case OP_FBLE_UN:
        case OP_FBLT_UN: {
                if ((info = mono_find_jit_opcode_emulation (tree->opcode))) {
                        MonoCompile *cfg = data;
                        MonoInst *iargs [2];
                
                        iargs [0] = tree->inst_i0;
                        iargs [1] = tree->inst_i1;
                
                        mono_emulate_opcode (cfg, tree, iargs, info);

                        dec_foreach (iargs [0], cfg);
                        dec_foreach (iargs [1], cfg);
                        break;
                } else {
                        g_assert_not_reached ();
                }
                break;
        }
        case OP_FCEQ:
        case OP_FCGT:
        case OP_FCGT_UN:
        case OP_FCLT:
        case OP_FCLT_UN: {
                if ((info = mono_find_jit_opcode_emulation (tree->opcode))) {
                        MonoCompile *cfg = data;
                        MonoInst *iargs [2];

                        /* the args are in the compare opcode ... */
                        iargs [0] = tree->inst_i0;
                        iargs [1] = tree->inst_i1;
                
                        mono_emulate_opcode (cfg, tree, iargs, info);

                        dec_foreach (iargs [0], cfg);
                        dec_foreach (iargs [1], cfg);
                        break;
                } else {
                        g_assert_not_reached ();
                }
                break;
        }
#endif

        default:
                break;
        }
}

void
mono_inst_foreach (MonoInst *tree, MonoInstFunc func, gpointer data) {

        switch (mono_burg_arity [tree->opcode]) {
        case 0: break;
        case 1: 
                mono_inst_foreach (tree->inst_left, func, data);
                break;
        case 2: 
                mono_inst_foreach (tree->inst_left, func, data);
                mono_inst_foreach (tree->inst_right, func, data);
                break;
        default:
                g_assert_not_reached ();
        }
        func (tree, data);
}

G_GNUC_UNUSED
static void
mono_print_bb_code (MonoBasicBlock *bb) {
        if (bb->code) {
                MonoInst *c = bb->code;
                while (c) {
                        mono_print_tree (c);
                        g_print ("\n");
                        c = c->next;
                }
        }
}

static void
print_dfn (MonoCompile *cfg) {
        int i, j;
        char *code;
        MonoBasicBlock *bb;

        g_print ("IR code for method %s\n", mono_method_full_name (cfg->method, TRUE));

        for (i = 0; i < cfg->num_bblocks; ++i) {
                bb = cfg->bblocks [i];
                /*if (bb->cil_code) {
                        char* code1, *code2;
                        code1 = mono_disasm_code_one (NULL, cfg->method, bb->cil_code, NULL);
                        if (bb->last_ins->cil_code)
                                code2 = mono_disasm_code_one (NULL, cfg->method, bb->last_ins->cil_code, NULL);
                        else
                                code2 = g_strdup ("");

                        code1 [strlen (code1) - 1] = 0;
                        code = g_strdup_printf ("%s -> %s", code1, code2);
                        g_free (code1);
                        g_free (code2);
                } else*/
                        code = g_strdup ("\n");
                g_print ("\nBB%d DFN%d (len: %d): %s", bb->block_num, i, bb->cil_length, code);
                if (bb->code) {
                        MonoInst *c = bb->code;
                        while (c) {
                                mono_print_tree (c);
                                g_print ("\n");
                                c = c->next;
                        }
                } else {

                }

                g_print ("\tprev:");
                for (j = 0; j < bb->in_count; ++j) {
                        g_print (" BB%d", bb->in_bb [j]->block_num);
                }
                g_print ("\t\tsucc:");
                for (j = 0; j < bb->out_count; ++j) {
                        g_print (" BB%d", bb->out_bb [j]->block_num);
                }
                g_print ("\n\tidom: BB%d\n", bb->idom? bb->idom->block_num: -1);

                if (bb->idom)
                        g_assert (mono_bitset_test_fast (bb->dominators, bb->idom->dfn));

                if (bb->dominators)
                        mono_blockset_print (cfg, bb->dominators, "\tdominators", bb->idom? bb->idom->dfn: -1);
                if (bb->dfrontier)
                        mono_blockset_print (cfg, bb->dfrontier, "\tdfrontier", -1);
                g_free (code);
        }

        g_print ("\n");
}

void
mono_bblock_add_inst (MonoBasicBlock *bb, MonoInst *inst)
{
        inst->next = NULL;
        if (bb->last_ins) {
                g_assert (bb->code);
                bb->last_ins->next = inst;
                bb->last_ins = inst;
        } else {
                bb->last_ins = bb->code = inst;
        }
}

void
mono_destroy_compile (MonoCompile *cfg)
{
        //mono_mempool_stats (cfg->mempool);
        mono_free_loop_info (cfg);
        if (cfg->rs)
                mono_regstate_free (cfg->rs);
        if (cfg->spvars)
                g_hash_table_destroy (cfg->spvars);
        if (cfg->exvars)
                g_hash_table_destroy (cfg->exvars);
        mono_mempool_destroy (cfg->mempool);
        g_list_free (cfg->ldstr_list);
        g_hash_table_destroy (cfg->token_info_hash);

        g_free (cfg->varinfo);
        g_free (cfg->vars);
        g_free (cfg->exception_message);
        g_free (cfg);
}

#ifdef HAVE_KW_THREAD
static __thread gpointer mono_lmf_addr MONO_TLS_FAST;
#ifdef MONO_ARCH_ENABLE_MONO_LMF_VAR
/* 
 * When this is defined, the current lmf is stored in this tls variable instead of in 
 * jit_tls->lmf.
 */
static __thread gpointer mono_lmf MONO_TLS_FAST;
#endif
#endif

guint32
mono_get_jit_tls_key (void)
{
        return mono_jit_tls_id;
}

gint32
mono_get_lmf_tls_offset (void)
{
#if defined(HAVE_KW_THREAD) && defined(MONO_ARCH_ENABLE_MONO_LMF_VAR)
        int offset;
        MONO_THREAD_VAR_OFFSET(mono_lmf,offset);
        return offset;
#else
        return -1;
#endif
}

gint32
mono_get_lmf_addr_tls_offset (void)
{
        int offset;
        MONO_THREAD_VAR_OFFSET(mono_lmf_addr,offset);
        return offset;
}

MonoLMF *
mono_get_lmf (void)
{
#if defined(HAVE_KW_THREAD) && defined(MONO_ARCH_ENABLE_MONO_LMF_VAR)
        return mono_lmf;
#else
        MonoJitTlsData *jit_tls;

        if ((jit_tls = TlsGetValue (mono_jit_tls_id)))
                return jit_tls->lmf;

        g_assert_not_reached ();
        return NULL;
#endif
}

MonoLMF **
mono_get_lmf_addr (void)
{
#ifdef HAVE_KW_THREAD
        return mono_lmf_addr;
#else
        MonoJitTlsData *jit_tls;

        if ((jit_tls = TlsGetValue (mono_jit_tls_id)))
                return &jit_tls->lmf;

        g_assert_not_reached ();
        return NULL;
#endif
}

/* Called by native->managed wrappers */
void
mono_jit_thread_attach (MonoDomain *domain)
{
#ifdef HAVE_KW_THREAD
        if (!mono_lmf_addr) {
                mono_thread_attach (domain);
        }
#else
        if (!TlsGetValue (mono_jit_tls_id))
                mono_thread_attach (domain);
#endif
}       

/**
 * mono_thread_abort:
 * @obj: exception object
 *
 * abort the thread, print exception information and stack trace
 */
static void
mono_thread_abort (MonoObject *obj)
{
        /* MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id); */
        
        /* handle_remove should be eventually called for this thread, too
        g_free (jit_tls);*/

        mono_thread_exit ();
}

static void*
setup_jit_tls_data (gpointer stack_start, gpointer abort_func)
{
        MonoJitTlsData *jit_tls;
        MonoLMF *lmf;

        jit_tls = TlsGetValue (mono_jit_tls_id);
        if (jit_tls)
                return jit_tls;

        jit_tls = g_new0 (MonoJitTlsData, 1);

        TlsSetValue (mono_jit_tls_id, jit_tls);

        jit_tls->abort_func = abort_func;
        jit_tls->end_of_stack = stack_start;

        lmf = g_new0 (MonoLMF, 1);
        lmf->ebp = -1;

        jit_tls->first_lmf = lmf;

#if defined(HAVE_KW_THREAD) && defined(MONO_ARCH_ENABLE_MONO_LMF_VAR)
        /* jit_tls->lmf is unused */
        mono_lmf = lmf;
        mono_lmf_addr = &mono_lmf;
#else
#if defined(HAVE_KW_THREAD)
        mono_lmf_addr = &jit_tls->lmf;  
#endif

        jit_tls->lmf = lmf;
#endif

        mono_arch_setup_jit_tls_data (jit_tls);
        mono_setup_altstack (jit_tls);

        return jit_tls;
}

static void
mono_thread_start_cb (gsize tid, gpointer stack_start, gpointer func)
{
        MonoThread *thread;
        void *jit_tls = setup_jit_tls_data (stack_start, mono_thread_abort);
        thread = mono_thread_current ();
        if (thread)
                thread->jit_data = jit_tls;
}

void (*mono_thread_attach_aborted_cb ) (MonoObject *obj) = NULL;

static void
mono_thread_abort_dummy (MonoObject *obj)
{
  if (mono_thread_attach_aborted_cb)
    mono_thread_attach_aborted_cb (obj);
  else
    mono_thread_abort (obj);
}

static void
mono_thread_attach_cb (gsize tid, gpointer stack_start)
{
        MonoThread *thread;
        void *jit_tls = setup_jit_tls_data (stack_start, mono_thread_abort_dummy);
        thread = mono_thread_current ();
        if (thread)
                thread->jit_data = jit_tls;
        if (mono_profiler_get_events () & MONO_PROFILE_STATISTICAL)
                setup_stat_profiler ();
}

static void
mini_thread_cleanup (MonoThread *thread)
{
        MonoJitTlsData *jit_tls = thread->jit_data;

        if (jit_tls) {
                mono_arch_free_jit_tls_data (jit_tls);

                mono_free_altstack (jit_tls);
                g_free (jit_tls->first_lmf);
                g_free (jit_tls);
                thread->jit_data = NULL;
                TlsSetValue (mono_jit_tls_id, NULL);
        }
}

void
mono_add_patch_info (MonoCompile *cfg, int ip, MonoJumpInfoType type, gconstpointer target)
{
        MonoJumpInfo *ji = mono_mempool_alloc (cfg->mempool, sizeof (MonoJumpInfo));

        ji->ip.i = ip;
        ji->type = type;
        ji->data.target = target;
        ji->next = cfg->patch_info;

        cfg->patch_info = ji;
}

void
mono_remove_patch_info (MonoCompile *cfg, int ip)
{
        MonoJumpInfo **ji = &cfg->patch_info;

        while (*ji) {
                if ((*ji)->ip.i == ip)
                        *ji = (*ji)->next;
                else
                        ji = &((*ji)->next);
        }
}

/**
 * mono_patch_info_dup_mp:
 *
 * Make a copy of PATCH_INFO, allocating memory from the mempool MP.
 */
MonoJumpInfo*
mono_patch_info_dup_mp (MonoMemPool *mp, MonoJumpInfo *patch_info)
{
        MonoJumpInfo *res = mono_mempool_alloc (mp, sizeof (MonoJumpInfo));
        memcpy (res, patch_info, sizeof (MonoJumpInfo));

        switch (patch_info->type) {
        case MONO_PATCH_INFO_RVA:
        case MONO_PATCH_INFO_LDSTR:
        case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
        case MONO_PATCH_INFO_LDTOKEN:
        case MONO_PATCH_INFO_DECLSEC:
                res->data.token = mono_mempool_alloc (mp, sizeof (MonoJumpInfoToken));
                memcpy (res->data.token, patch_info->data.token, sizeof (MonoJumpInfoToken));
                break;
        case MONO_PATCH_INFO_SWITCH:
                res->data.table = mono_mempool_alloc (mp, sizeof (MonoJumpInfoBBTable));
                memcpy (res->data.table, patch_info->data.table, sizeof (MonoJumpInfoBBTable));
                break;
        default:
                break;
        }

        return res;
}

guint
mono_patch_info_hash (gconstpointer data)
{
        const MonoJumpInfo *ji = (MonoJumpInfo*)data;

        switch (ji->type) {
        case MONO_PATCH_INFO_RVA:
        case MONO_PATCH_INFO_LDSTR:
        case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
        case MONO_PATCH_INFO_LDTOKEN:
        case MONO_PATCH_INFO_DECLSEC:
                return (ji->type << 8) | ji->data.token->token;
        default:
                return (ji->type << 8);
        }
}

/* 
 * mono_patch_info_equal:
 * 
 * This might fail to recognize equivalent patches, i.e. floats, so its only
 * usable in those cases where this is not a problem, i.e. sharing GOT slots
 * in AOT.
 */
gint
mono_patch_info_equal (gconstpointer ka, gconstpointer kb)
{
        const MonoJumpInfo *ji1 = (MonoJumpInfo*)ka;
        const MonoJumpInfo *ji2 = (MonoJumpInfo*)kb;

        if (ji1->type != ji2->type)
                return 0;

        switch (ji1->type) {
        case MONO_PATCH_INFO_RVA:
        case MONO_PATCH_INFO_LDSTR:
        case MONO_PATCH_INFO_TYPE_FROM_HANDLE:
        case MONO_PATCH_INFO_LDTOKEN:
        case MONO_PATCH_INFO_DECLSEC:
                if ((ji1->data.token->image != ji2->data.token->image) ||
                        (ji1->data.token->token != ji2->data.token->token))
                        return 0;
                break;
        default:
                if (ji1->data.name != ji2->data.name)
                        return 0;
                break;
        }

        return 1;
}

gpointer
mono_resolve_patch_target (MonoMethod *method, MonoDomain *domain, guint8 *code, MonoJumpInfo *patch_info, gboolean run_cctors)
{
        unsigned char *ip = patch_info->ip.i + code;
        gconstpointer target = NULL;

        switch (patch_info->type) {
        case MONO_PATCH_INFO_BB:
                target = patch_info->data.bb->native_offset + code;
                break;
        case MONO_PATCH_INFO_ABS:
                target = patch_info->data.target;
                break;
        case MONO_PATCH_INFO_LABEL:
                target = patch_info->data.inst->inst_c0 + code;
                break;
        case MONO_PATCH_INFO_IP:
                target = ip;
                break;
        case MONO_PATCH_INFO_METHOD_REL:
                target = code + patch_info->data.offset;
                break;
        case MONO_PATCH_INFO_INTERNAL_METHOD: {
                MonoJitICallInfo *mi = mono_find_jit_icall_by_name (patch_info->data.name);
                if (!mi) {
                        g_warning ("unknown MONO_PATCH_INFO_INTERNAL_METHOD %s", patch_info->data.name);
                        g_assert_not_reached ();
                }
                target = mono_icall_get_wrapper (mi);
                break;
        }
        case MONO_PATCH_INFO_METHOD_JUMP: {
                GSList *list;

                /* get the trampoline to the method from the domain */
                target = mono_create_jump_trampoline (domain, patch_info->data.method, TRUE);
                if (!domain->jump_target_hash)
                        domain->jump_target_hash = g_hash_table_new (NULL, NULL);
                list = g_hash_table_lookup (domain->jump_target_hash, patch_info->data.method);
                list = g_slist_prepend (list, ip);
                g_hash_table_insert (domain->jump_target_hash, patch_info->data.method, list);
                break;
        }
        case MONO_PATCH_INFO_METHOD:
                if (patch_info->data.method == method) {
                        target = code;
                } else
                        /* get the trampoline to the method from the domain */
                        target = mono_create_jit_trampoline (patch_info->data.method);
                break;
        case MONO_PATCH_INFO_SWITCH: {
                gpointer *jump_table;
                int i;

                if (method && method->dynamic) {
                        jump_table = mono_code_manager_reserve (mono_dynamic_code_hash_lookup (domain, method)->code_mp, sizeof (gpointer) * patch_info->data.table->table_size);
                } else {
                        mono_domain_lock (domain);
                        jump_table = mono_code_manager_reserve (domain->code_mp, sizeof (gpointer) * patch_info->data.table->table_size);
                        mono_domain_unlock (domain);
                }

                for (i = 0; i < patch_info->data.table->table_size; i++) {
                        jump_table [i] = code + GPOINTER_TO_INT (patch_info->data.table->table [i]);
                }
                target = jump_table;
                break;
        }
        case MONO_PATCH_INFO_METHODCONST:
        case MONO_PATCH_INFO_CLASS:
        case MONO_PATCH_INFO_IMAGE:
        case MONO_PATCH_INFO_FIELD:
                target = patch_info->data.target;
                break;
        case MONO_PATCH_INFO_IID:
                mono_class_init (patch_info->data.klass);
                target = GINT_TO_POINTER ((int)patch_info->data.klass->interface_id);
                break;
        case MONO_PATCH_INFO_ADJUSTED_IID:
                mono_class_init (patch_info->data.klass);
                target = GINT_TO_POINTER ((int)(-((patch_info->data.klass->interface_id + 1) * SIZEOF_VOID_P)));
                break;
        case MONO_PATCH_INFO_VTABLE:
                target = mono_class_vtable (domain, patch_info->data.klass);
                break;
        case MONO_PATCH_INFO_CLASS_INIT:
                target = mono_create_class_init_trampoline (mono_class_vtable (domain, patch_info->data.klass));
                break;
        case MONO_PATCH_INFO_SFLDA: {
                MonoVTable *vtable = mono_class_vtable (domain, patch_info->data.field->parent);
                if (!vtable->initialized && !(vtable->klass->flags & TYPE_ATTRIBUTE_BEFORE_FIELD_INIT) && (method && mono_class_needs_cctor_run (vtable->klass, method)))
                        /* Done by the generated code */
                        ;
                else {
                        if (run_cctors)
                                mono_runtime_class_init (vtable);
                }
                target = (char*)vtable->data + patch_info->data.field->offset;
                break;
        }
        case MONO_PATCH_INFO_RVA:
                target = mono_image_rva_map (patch_info->data.token->image, patch_info->data.token->token);
                break;
        case MONO_PATCH_INFO_R4:
        case MONO_PATCH_INFO_R8:
                target = patch_info->data.target;
                break;
        case MONO_PATCH_INFO_EXC_NAME:
                target = patch_info->data.name;
                break;
        case MONO_PATCH_INFO_LDSTR:
                target =
                        mono_ldstr (domain, patch_info->data.token->image, 
                                                mono_metadata_token_index (patch_info->data.token->token));
                break;
        case MONO_PATCH_INFO_TYPE_FROM_HANDLE: {
                gpointer handle;
                MonoClass *handle_class;

                handle = mono_ldtoken (patch_info->data.token->image, 
                                       patch_info->data.token->token, &handle_class, NULL);
                mono_class_init (handle_class);
                mono_class_init (mono_class_from_mono_type (handle));

                target =
                        mono_type_get_object (domain, handle);
                break;
        }
        case MONO_PATCH_INFO_LDTOKEN: {
                gpointer handle;
                MonoClass *handle_class;
                
                handle = mono_ldtoken (patch_info->data.token->image,
                                       patch_info->data.token->token, &handle_class, NULL);
                mono_class_init (handle_class);
                
                target = handle;
                break;
        }
        case MONO_PATCH_INFO_DECLSEC:
                target = (mono_metadata_blob_heap (patch_info->data.token->image, patch_info->data.token->token) + 2);
                break;
        case MONO_PATCH_INFO_BB_OVF:
        case MONO_PATCH_INFO_EXC_OVF:
        case MONO_PATCH_INFO_GOT_OFFSET:
        case MONO_PATCH_INFO_NONE:
                break;
        default:
                g_assert_not_reached ();
        }

        return (gpointer)target;
}

static void
dec_foreach (MonoInst *tree, MonoCompile *cfg) {
        MonoJitICallInfo *info;

        decompose_foreach (tree, cfg);

        switch (mono_burg_arity [tree->opcode]) {
        case 0: break;
        case 1: 
                dec_foreach (tree->inst_left, cfg);

                if ((info = mono_find_jit_opcode_emulation (tree->opcode))) {
                        MonoInst *iargs [2];
                
                        iargs [0] = tree->inst_left;

                        mono_emulate_opcode (cfg, tree, iargs, info);
                        return;
                }

                break;
        case 2:
#ifdef MONO_ARCH_BIGMUL_INTRINS
                if (tree->opcode == OP_LMUL
                                && (cfg->opt & MONO_OPT_INTRINS)
                                && (tree->inst_left->opcode == CEE_CONV_I8 
                                        || tree->inst_left->opcode == CEE_CONV_U8)
                                && tree->inst_left->inst_left->type == STACK_I4
                                && (tree->inst_right->opcode == CEE_CONV_I8 
                                        || tree->inst_right->opcode == CEE_CONV_U8)
                                && tree->inst_right->inst_left->type == STACK_I4
                                && tree->inst_left->opcode == tree->inst_right->opcode) {
                        tree->opcode = (tree->inst_left->opcode == CEE_CONV_I8 ? OP_BIGMUL: OP_BIGMUL_UN);
                        tree->inst_left = tree->inst_left->inst_left;
                        tree->inst_right = tree->inst_right->inst_left;
                        dec_foreach (tree, cfg);
                } else 
#endif
                        if ((info = mono_find_jit_opcode_emulation (tree->opcode))) {
                        MonoInst *iargs [2];
                
                        iargs [0] = tree->inst_i0;
                        iargs [1] = tree->inst_i1;
                
                        mono_emulate_opcode (cfg, tree, iargs, info);

                        dec_foreach (iargs [0], cfg);
                        dec_foreach (iargs [1], cfg);
                        return;
                } else {
                        dec_foreach (tree->inst_left, cfg);
                        dec_foreach (tree->inst_right, cfg);
                }
                break;
        default:
                g_assert_not_reached ();
        }
}

static void
decompose_pass (MonoCompile *cfg) {
        MonoBasicBlock *bb;

        for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
                MonoInst *tree;
                cfg->cbb = bb;
                cfg->prev_ins = NULL;
                for (tree = cfg->cbb->code; tree; tree = tree->next) {
                        dec_foreach (tree, cfg);
                        cfg->prev_ins = tree;
                }
        }
}

static void
nullify_basic_block (MonoBasicBlock *bb) 
{
        bb->in_count = 0;
        bb->out_count = 0;
        bb->in_bb = NULL;
        bb->out_bb = NULL;
        bb->next_bb = NULL;
        bb->code = bb->last_ins = NULL;
        bb->cil_code = NULL;
}

static void 
replace_out_block (MonoBasicBlock *bb, MonoBasicBlock *orig,  MonoBasicBlock *repl)
{
        int i;

        for (i = 0; i < bb->out_count; i++) {
                MonoBasicBlock *ob = bb->out_bb [i];
                if (ob == orig) {
                        if (!repl) {
                                if (bb->out_count > 1) {
                                        bb->out_bb [i] = bb->out_bb [bb->out_count - 1];
                                }
                                bb->out_count--;
                        } else {
                                bb->out_bb [i] = repl;
                        }
                }
        }
}

static void 
replace_in_block (MonoBasicBlock *bb, MonoBasicBlock *orig, MonoBasicBlock *repl)
{
        int i;

        for (i = 0; i < bb->in_count; i++) {
                MonoBasicBlock *ib = bb->in_bb [i];
                if (ib == orig) {
                        if (!repl) {
                                if (bb->in_count > 1) {
                                        bb->in_bb [i] = bb->in_bb [bb->in_count - 1];
                                }
                                bb->in_count--;
                        } else {
                                bb->in_bb [i] = repl;
                        }
                }
        }
}

static void
replace_out_block_in_code (MonoBasicBlock *bb, MonoBasicBlock *orig, MonoBasicBlock *repl) {
        MonoInst *inst;
        
        for (inst = bb->code; inst != NULL; inst = inst->next) {
                if (inst->opcode == OP_CALL_HANDLER) {
                        if (inst->inst_target_bb == orig) {
                                inst->inst_target_bb = repl;
                        }
                }
        }
        if (bb->last_ins != NULL) {
                switch (bb->last_ins->opcode) {
                case OP_BR:
                        if (bb->last_ins->inst_target_bb == orig) {
                                bb->last_ins->inst_target_bb = repl;
                        }
                        break;
                case CEE_SWITCH: {
                        int i;
                        int n = GPOINTER_TO_INT (bb->last_ins->klass);
                        for (i = 0; i < n; i++ ) {
                                if (bb->last_ins->inst_many_bb [i] == orig) {
                                        bb->last_ins->inst_many_bb [i] = repl;
                                }
                        }
                        break;
                }
                case CEE_BNE_UN:
                case CEE_BEQ:
                case CEE_BLT:
                case CEE_BLT_UN:
                case CEE_BGT:
                case CEE_BGT_UN:
                case CEE_BGE:
                case CEE_BGE_UN:
                case CEE_BLE:
                case CEE_BLE_UN:
                        if (bb->last_ins->inst_true_bb == orig) {
                                bb->last_ins->inst_true_bb = repl;
                        }
                        if (bb->last_ins->inst_false_bb == orig) {
                                bb->last_ins->inst_false_bb = repl;
                        }
                        break;
                default:
                        break;
                }
        }
}

static void 
replace_basic_block (MonoBasicBlock *bb, MonoBasicBlock *orig,  MonoBasicBlock *repl)
{
        int i, j;

        for (i = 0; i < bb->out_count; i++) {
                MonoBasicBlock *ob = bb->out_bb [i];
                for (j = 0; j < ob->in_count; j++) {
                        if (ob->in_bb [j] == orig) {
                                ob->in_bb [j] = repl;
                        }
                }
        }

}

/**
  * Check if a bb is useless (is just made of NOPs and ends with an
  * unconditional branch, or nothing).
  * If it is so, unlink it from the CFG and nullify it, and return TRUE.
  * Otherwise, return FALSE;
  */
static gboolean
remove_block_if_useless (MonoCompile *cfg, MonoBasicBlock *bb, MonoBasicBlock *previous_bb) {
        MonoBasicBlock *target_bb = NULL;
        MonoInst *inst;
        
        /* Do not touch handlers */
        if (bb->region != -1) {
                bb->not_useless = TRUE;
                return FALSE;
        }
        
        for (inst = bb->code; inst != NULL; inst = inst->next) {
                switch (inst->opcode) {
                case OP_NOP:
                        break;
                case OP_BR:
                        target_bb = inst->inst_target_bb;
                        break;
                default:
                        bb->not_useless = TRUE;
                        return FALSE;
                }
        }
        
        if (target_bb == NULL) {
                if ((bb->out_count == 1) && (bb->out_bb [0] == bb->next_bb)) {
                        target_bb = bb->next_bb;
                } else {
                        /* Do not touch empty BBs that do not "fall through" to their next BB (like the exit BB) */
                        return FALSE;
                }
        }
        
        /* Do not touch BBs following a switch (they are the "default" branch) */
        if ((previous_bb->last_ins != NULL) && (previous_bb->last_ins->opcode == CEE_SWITCH)) {
                return FALSE;
        }
        
        /* Do not touch BBs following the entry BB and jumping to something that is not */
        /* thiry "next" bb (the entry BB cannot contain the branch) */
        if ((previous_bb == cfg->bb_entry) && (bb->next_bb != target_bb)) {
                return FALSE;
        }

        /* 
         * Do not touch BBs following a try block as the code in 
         * mini_method_compile needs them to compute the length of the try block.
         */
        if (MONO_BBLOCK_IS_IN_REGION (previous_bb, MONO_REGION_TRY))
                return FALSE;
        
        /* Check that there is a target BB, and that bb is not an empty loop (Bug 75061) */
        if ((target_bb != NULL) && (target_bb != bb)) {
                int i;

                if (cfg->verbose_level > 1) {
                        printf ("remove_block_if_useless %s, removed BB%d\n", mono_method_full_name (cfg->method, TRUE), bb->block_num);
                }
                
                /* unlink_bblock () modifies the bb->in_bb array so can't use a for loop here */
                while (bb->in_count) {
                        MonoBasicBlock *in_bb = bb->in_bb [0];
                        mono_unlink_bblock (cfg, in_bb, bb);
                        link_bblock (cfg, in_bb, target_bb);
                        replace_out_block_in_code (in_bb, bb, target_bb);
                }
                
                mono_unlink_bblock (cfg, bb, target_bb);
                
                if ((previous_bb != cfg->bb_entry) &&
                                (previous_bb->region == bb->region) &&
                                ((previous_bb->last_ins == NULL) ||
                                ((previous_bb->last_ins->opcode != OP_BR) &&
                                (! (MONO_IS_COND_BRANCH_OP (previous_bb->last_ins))) &&
                                (previous_bb->last_ins->opcode != CEE_SWITCH)))) {
                        for (i = 0; i < previous_bb->out_count; i++) {
                                if (previous_bb->out_bb [i] == target_bb) {
                                        MonoInst *jump;
                                        MONO_INST_NEW (cfg, jump, OP_BR);
                                        MONO_ADD_INS (previous_bb, jump);
                                        jump->cil_code = previous_bb->cil_code;
                                        jump->inst_target_bb = target_bb;
                                        break;
                                }
                        }
                }
                
                previous_bb->next_bb = bb->next_bb;
                nullify_basic_block (bb);
                
                return TRUE;
        } else {
                return FALSE;
        }
}

static void
merge_basic_blocks (MonoBasicBlock *bb, MonoBasicBlock *bbn) 
{
        bb->out_count = bbn->out_count;
        bb->out_bb = bbn->out_bb;

        replace_basic_block (bb, bbn, bb);

        /* Nullify branch at the end of bb */
        if (bb->last_ins && MONO_IS_BRANCH_OP (bb->last_ins)) {
                bb->last_ins->opcode = OP_NOP;
        }               

        if (bb->last_ins) {
                if (bbn->code) {
                        bb->last_ins->next = bbn->code;
                        bb->last_ins = bbn->last_ins;
                }
        } else {
                bb->code = bbn->code;
                bb->last_ins = bbn->last_ins;
        }
        bb->next_bb = bbn->next_bb;
        nullify_basic_block (bbn);
}

static void
move_basic_block_to_end (MonoCompile *cfg, MonoBasicBlock *bb)
{
        MonoBasicBlock *bbn, *next;

        next = bb->next_bb;

        /* Find the previous */
        for (bbn = cfg->bb_entry; bbn->next_bb && bbn->next_bb != bb; bbn = bbn->next_bb)
                ;
        if (bbn->next_bb) {
                bbn->next_bb = bb->next_bb;
        }

        /* Find the last */
        for (bbn = cfg->bb_entry; bbn->next_bb; bbn = bbn->next_bb)
                ;
        bbn->next_bb = bb;
        bb->next_bb = NULL;

        /* Add a branch */
        if (next && (!bb->last_ins || (bb->last_ins->opcode != OP_NOT_REACHED))) {
                MonoInst *ins;

                MONO_INST_NEW (cfg, ins, OP_BR);
                MONO_ADD_INS (bb, ins);
                link_bblock (cfg, bb, next);
                ins->inst_target_bb = next;
        }               
}

/* checks that a and b represent the same instructions, conservatively,
 * it can return FALSE also for two trees that are equal.
 * FIXME: also make sure there are no side effects.
 */
static int
same_trees (MonoInst *a, MonoInst *b)
{
        int arity;
        if (a->opcode != b->opcode)
                return FALSE;
        arity = mono_burg_arity [a->opcode];
        if (arity == 1) {
                if (a->ssa_op == b->ssa_op && a->ssa_op == MONO_SSA_LOAD && a->inst_i0 == b->inst_i0)
                        return TRUE;
                return same_trees (a->inst_left, b->inst_left);
        } else if (arity == 2) {
                return same_trees (a->inst_left, b->inst_left) && same_trees (a->inst_right, b->inst_right);
        } else if (arity == 0) {
                switch (a->opcode) {
                case OP_ICONST:
                        return a->inst_c0 == b->inst_c0;
                default:
                        return FALSE;
                }
        }
        return FALSE;
}

static int
get_unsigned_condbranch (int opcode)
{
        switch (opcode) {
        case CEE_BLE: return CEE_BLE_UN;
        case CEE_BLT: return CEE_BLT_UN;
        case CEE_BGE: return CEE_BGE_UN;
        case CEE_BGT: return CEE_BGT_UN;
        }
        g_assert_not_reached ();
        return 0;
}

static int
tree_is_unsigned (MonoInst* ins) {
        switch (ins->opcode) {
        case OP_ICONST:
                return (int)ins->inst_c0 >= 0;
        /* array lengths are positive as are string sizes */
        case CEE_LDLEN:
        case OP_STRLEN:
                return TRUE;
        case CEE_CONV_U1:
        case CEE_CONV_U2:
        case CEE_CONV_U4:
        case CEE_CONV_OVF_U1:
        case CEE_CONV_OVF_U2:
        case CEE_CONV_OVF_U4:
                return TRUE;
        case CEE_LDIND_U1:
        case CEE_LDIND_U2:
        case CEE_LDIND_U4:
                return TRUE;
        default:
                return FALSE;
        }
}

/* check if an unsigned compare can be used instead of two signed compares
 * for (val < 0 || val > limit) conditionals.
 * Returns TRUE if the optimization has been applied.
 * Note that this can't be applied if the second arg is not positive...
 */
static int
try_unsigned_compare (MonoCompile *cfg, MonoBasicBlock *bb)
{
        MonoBasicBlock *truet, *falset;
        MonoInst *cmp_inst = bb->last_ins->inst_left;
        MonoInst *condb;
        if (!cmp_inst->inst_right->inst_c0 == 0)
                return FALSE;
        truet = bb->last_ins->inst_true_bb;
        falset = bb->last_ins->inst_false_bb;
        if (falset->in_count != 1)
                return FALSE;
        condb = falset->last_ins;
        /* target bb must have one instruction */
        if (!condb || (condb != falset->code))
                return FALSE;
        if ((((condb->opcode == CEE_BLE || condb->opcode == CEE_BLT) && (condb->inst_false_bb == truet))
                        || ((condb->opcode == CEE_BGE || condb->opcode == CEE_BGT) && (condb->inst_true_bb == truet)))
                        && same_trees (cmp_inst->inst_left, condb->inst_left->inst_left)) {
                if (!tree_is_unsigned (condb->inst_left->inst_right))
                        return FALSE;
                condb->opcode = get_unsigned_condbranch (condb->opcode);
                /* change the original condbranch to just point to the new unsigned check */
                bb->last_ins->opcode = OP_BR;
                bb->last_ins->inst_target_bb = falset;
                replace_out_block (bb, truet, NULL);
                replace_in_block (truet, bb, NULL);
                return TRUE;
        }
        return FALSE;
}

/*
 * Optimizes the branches on the Control Flow Graph
 *
 */
static void
optimize_branches (MonoCompile *cfg)
{
        int i, changed = FALSE;
        MonoBasicBlock *bb, *bbn;
        guint32 niterations;

        /*
         * Some crazy loops could cause the code below to go into an infinite
         * loop, see bug #53003 for an example. To prevent this, we put an upper
         * bound on the number of iterations.
         */
        if (cfg->num_bblocks > 1000)
                niterations = cfg->num_bblocks * 2;
        else
                niterations = 1000;

        do {
                MonoBasicBlock *previous_bb;
                changed = FALSE;
                niterations --;

                /* we skip the entry block (exit is handled specially instead ) */
                for (previous_bb = cfg->bb_entry, bb = cfg->bb_entry->next_bb; bb; previous_bb = bb, bb = bb->next_bb) {

                        /* dont touch code inside exception clauses */
                        if (bb->region != -1)
                                continue;

                        if (!bb->not_useless && remove_block_if_useless (cfg, bb, previous_bb)) {
                                changed = TRUE;
                                continue;
                        }

                        if ((bbn = bb->next_bb) && bbn->in_count == 0 && bb->region == bbn->region) {
                                if (cfg->verbose_level > 2)
                                        g_print ("nullify block triggered %d\n", bbn->block_num);

                                bb->next_bb = bbn->next_bb;

                                for (i = 0; i < bbn->out_count; i++)
                                        replace_in_block (bbn->out_bb [i], bbn, NULL);

                                nullify_basic_block (bbn);                      
                                changed = TRUE;
                        }

                        if (bb->out_count == 1) {
                                bbn = bb->out_bb [0];

                                /* conditional branches where true and false targets are the same can be also replaced with OP_BR */
                                if (bb->last_ins && MONO_IS_COND_BRANCH_OP (bb->last_ins)) {
                                        MonoInst *pop;
                                        MONO_INST_NEW (cfg, pop, CEE_POP);
                                        pop->inst_left = bb->last_ins->inst_left->inst_left;
                                        mono_add_ins_to_end (bb, pop);
                                        MONO_INST_NEW (cfg, pop, CEE_POP);
                                        pop->inst_left = bb->last_ins->inst_left->inst_right;
                                        mono_add_ins_to_end (bb, pop);
                                        bb->last_ins->opcode = OP_BR;
                                        bb->last_ins->inst_target_bb = bb->last_ins->inst_true_bb;
                                        changed = TRUE;
                                        if (cfg->verbose_level > 2)
                                                g_print ("cond branch removal triggered in %d %d\n", bb->block_num, bb->out_count);
                                }

                                if (bb->region == bbn->region && bb->next_bb == bbn) {
                                        /* the block are in sequence anyway ... */

                                        /* branches to the following block can be removed */
                                        if (bb->last_ins && bb->last_ins->opcode == OP_BR) {
                                                bb->last_ins->opcode = OP_NOP;
                                                changed = TRUE;
                                                if (cfg->verbose_level > 2)
                                                        g_print ("br removal triggered %d -> %d\n", bb->block_num, bbn->block_num);
                                        }

                                        if (bbn->in_count == 1) {

                                                if (bbn != cfg->bb_exit) {
                                                        if (cfg->verbose_level > 2)
                                                                g_print ("block merge triggered %d -> %d\n", bb->block_num, bbn->block_num);
                                                        merge_basic_blocks (bb, bbn);
                                                        changed = TRUE;
                                                        continue;
                                                }

                                                //mono_print_bb_code (bb);
                                        }
                                }
                        }
                        if ((bbn = bb->next_bb) && bbn->in_count == 0 && bb->region == bbn->region) {
                                if (cfg->verbose_level > 2) {
                                        g_print ("nullify block triggered %d\n", bbn->block_num);
                                }
                                bb->next_bb = bbn->next_bb;

                                for (i = 0; i < bbn->out_count; i++)
                                        replace_in_block (bbn->out_bb [i], bbn, NULL);

                                nullify_basic_block (bbn);                      
                                changed = TRUE;
                                continue;
                        }

                        if (bb->out_count == 1) {
                                bbn = bb->out_bb [0];

                                if (bb->last_ins && bb->last_ins->opcode == OP_BR) {
                                        bbn = bb->last_ins->inst_target_bb;
                                        if (bb->region == bbn->region && bbn->code && bbn->code->opcode == OP_BR &&
                                            bbn->code->inst_target_bb->region == bb->region) {
                                                
                                                if (cfg->verbose_level > 2)
                                                        g_print ("in %s branch to branch triggered %d -> %d -> %d\n", cfg->method->name, 
                                                                 bb->block_num, bbn->block_num, bbn->code->inst_target_bb->block_num);

                                                replace_in_block (bbn, bb, NULL);
                                                replace_out_block (bb, bbn, bbn->code->inst_target_bb);
                                                link_bblock (cfg, bb, bbn->code->inst_target_bb);
                                                bb->last_ins->inst_target_bb = bbn->code->inst_target_bb;
                                                changed = TRUE;
                                                continue;
                                        }
                                }
                        } else if (bb->out_count == 2) {
                                if (bb->last_ins && MONO_IS_COND_BRANCH_NOFP (bb->last_ins)) {
                                        int branch_result = mono_eval_cond_branch (bb->last_ins);
                                        MonoBasicBlock *taken_branch_target = NULL, *untaken_branch_target = NULL;
                                        if (branch_result == BRANCH_TAKEN) {
                                                taken_branch_target = bb->last_ins->inst_true_bb;
                                                untaken_branch_target = bb->last_ins->inst_false_bb;
                                        } else if (branch_result == BRANCH_NOT_TAKEN) {
                                                taken_branch_target = bb->last_ins->inst_false_bb;
                                                untaken_branch_target = bb->last_ins->inst_true_bb;
                                        }
                                        if (taken_branch_target) {
                                                /* if mono_eval_cond_branch () is ever taken to handle 
                                                 * non-constant values to compare, issue a pop here.
                                                 */
                                                bb->last_ins->opcode = OP_BR;
                                                bb->last_ins->inst_target_bb = taken_branch_target;
                                                mono_unlink_bblock (cfg, bb, untaken_branch_target);
                                                changed = TRUE;
                                                continue;
                                        }
                                        bbn = bb->last_ins->inst_true_bb;
                                        if (bb->region == bbn->region && bbn->code && bbn->code->opcode == OP_BR &&
                                            bbn->code->inst_target_bb->region == bb->region) {
                                                if (cfg->verbose_level > 2)             
                                                        g_print ("cbranch1 to branch triggered %d -> (%d) %d (0x%02x)\n", 
                                                                 bb->block_num, bbn->block_num, bbn->code->inst_target_bb->block_num, 
                                                                 bbn->code->opcode);

                                                /* 
                                                 * Unlink, then relink bblocks to avoid various
                                                 * tricky situations when the two targets of the branch
                                                 * are equal, or will become equal after the change.
                                                 */
                                                mono_unlink_bblock (cfg, bb, bb->last_ins->inst_true_bb);
                                                mono_unlink_bblock (cfg, bb, bb->last_ins->inst_false_bb);

                                                bb->last_ins->inst_true_bb = bbn->code->inst_target_bb;

                                                link_bblock (cfg, bb, bb->last_ins->inst_true_bb);
                                                link_bblock (cfg, bb, bb->last_ins->inst_false_bb);

                                                changed = TRUE;
                                                continue;
                                        }

                                        bbn = bb->last_ins->inst_false_bb;
                                        if (bb->region == bbn->region && bbn->code && bbn->code->opcode == OP_BR &&
                                            bbn->code->inst_target_bb->region == bb->region) {
                                                if (cfg->verbose_level > 2)
                                                        g_print ("cbranch2 to branch triggered %d -> (%d) %d (0x%02x)\n", 
                                                                 bb->block_num, bbn->block_num, bbn->code->inst_target_bb->block_num, 
                                                                 bbn->code->opcode);

                                                mono_unlink_bblock (cfg, bb, bb->last_ins->inst_true_bb);
                                                mono_unlink_bblock (cfg, bb, bb->last_ins->inst_false_bb);

                                                bb->last_ins->inst_false_bb = bbn->code->inst_target_bb;

                                                link_bblock (cfg, bb, bb->last_ins->inst_true_bb);
                                                link_bblock (cfg, bb, bb->last_ins->inst_false_bb);

                                                changed = TRUE;
                                                continue;
                                        }
                                }

                                /* detect and optimize to unsigned compares checks like: if (v < 0 || v > limit */
                                if (bb->last_ins && bb->last_ins->opcode == CEE_BLT && bb->last_ins->inst_left->inst_right->opcode == OP_ICONST) {
                                        if (try_unsigned_compare (cfg, bb)) {
                                                /*g_print ("applied in bb %d (->%d) %s\n", bb->block_num, bb->last_ins->inst_target_bb->block_num, mono_method_full_name (cfg->method, TRUE));*/
                                                changed = TRUE;
                                                continue;
                                        }
                                }

                                if (bb->last_ins && MONO_IS_COND_BRANCH_NOFP (bb->last_ins)) {
                                        if (bb->last_ins->inst_false_bb->out_of_line && (bb->region == bb->last_ins->inst_false_bb->region)) {
                                                /* Reverse the branch */
                                                bb->last_ins->opcode = reverse_branch_op (bb->last_ins->opcode);
                                                bbn = bb->last_ins->inst_false_bb;
                                                bb->last_ins->inst_false_bb = bb->last_ins->inst_true_bb;
                                                bb->last_ins->inst_true_bb = bbn;

                                                move_basic_block_to_end (cfg, bb->last_ins->inst_true_bb);
                                                if (cfg->verbose_level > 2)
                                                        g_print ("cbranch to throw block triggered %d.\n", 
                                                                         bb->block_num);
                                        }
                                }
                        }
                }
        } while (changed && (niterations > 0));

}

static void
mono_compile_create_vars (MonoCompile *cfg)
{
        MonoMethodSignature *sig;
        MonoMethodHeader *header;
        int i;

        header = mono_method_get_header (cfg->method);

        sig = mono_method_signature (cfg->method);
        
        if (!MONO_TYPE_IS_VOID (sig->ret)) {
                cfg->ret = mono_mempool_alloc0 (cfg->mempool, sizeof (MonoInst));
                cfg->ret->opcode = OP_RETARG;
                cfg->ret->inst_vtype = sig->ret;
                cfg->ret->klass = mono_class_from_mono_type (sig->ret);
        }
        if (cfg->verbose_level > 2)
                g_print ("creating vars\n");

        cfg->args = mono_mempool_alloc0 (cfg->mempool, (sig->param_count + sig->hasthis) * sizeof (MonoInst*));

        if (sig->hasthis)
                cfg->args [0] = mono_compile_create_var (cfg, &cfg->method->klass->this_arg, OP_ARG);

        for (i = 0; i < sig->param_count; ++i) {
                cfg->args [i + sig->hasthis] = mono_compile_create_var (cfg, sig->params [i], OP_ARG);
                if (sig->params [i]->byref) {
                        cfg->disable_ssa = TRUE;
                }
        }

        cfg->locals_start = cfg->num_varinfo;

        if (cfg->verbose_level > 2)
                g_print ("creating locals\n");
        for (i = 0; i < header->num_locals; ++i)
                mono_compile_create_var (cfg, header->locals [i], OP_LOCAL);
        if (cfg->verbose_level > 2)
                g_print ("locals done\n");

#ifdef MONO_ARCH_HAVE_CREATE_VARS
        mono_arch_create_vars (cfg);
#endif
}

void
mono_print_code (MonoCompile *cfg)
{
        MonoBasicBlock *bb;
        
        for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
                MonoInst *tree = bb->code;      

                if (!tree)
                        continue;
                
                g_print ("CODE BLOCK %d (nesting %d):\n", bb->block_num, bb->nesting);

                for (; tree; tree = tree->next) {
                        mono_print_tree (tree);
                        g_print ("\n");
                }

                if (bb->last_ins)
                        bb->last_ins->next = NULL;
        }
}

extern const char * const mono_burg_rule_string [];

static void
emit_state (MonoCompile *cfg, MBState *state, int goal)
{
        MBState *kids [10];
        int ern = mono_burg_rule (state, goal);
        const guint16 *nts = mono_burg_nts_data + mono_burg_nts [ern];

        //g_print ("rule: %s\n", mono_burg_rule_string [ern]);
        switch (goal) {
        case MB_NTERM_reg:
                //if (state->reg2)
                //      state->reg1 = state->reg2; /* chain rule */
                //else
#ifdef MONO_ARCH_ENABLE_EMIT_STATE_OPT
                if (!state->reg1)
#endif
                        state->reg1 = mono_regstate_next_int (cfg->rs);
                //g_print ("alloc symbolic R%d (reg2: R%d) in block %d\n", state->reg1, state->reg2, cfg->cbb->block_num);
                break;
        case MB_NTERM_lreg:
                state->reg1 = mono_regstate_next_int (cfg->rs);
                state->reg2 = mono_regstate_next_int (cfg->rs);
                break;
        case MB_NTERM_freg:
#ifdef MONO_ARCH_SOFT_FLOAT
                state->reg1 = mono_regstate_next_int (cfg->rs);
                state->reg2 = mono_regstate_next_int (cfg->rs);
#else
                state->reg1 = mono_regstate_next_float (cfg->rs);
#endif
                break;
        default:
#ifdef MONO_ARCH_ENABLE_EMIT_STATE_OPT
                /*
                 * Enabling this might cause bugs to surface in the local register
                 * allocators on some architectures like x86.
                 */
                if ((state->tree->ssa_op == MONO_SSA_STORE) && (state->left->tree->opcode == OP_REGVAR)) {
                        /* Do not optimize away reg-reg moves */
                        if (! ((state->right->tree->ssa_op == MONO_SSA_LOAD) && (state->right->left->tree->opcode == OP_REGVAR))) {
                                state->right->reg1 = state->left->tree->dreg;
                        }
                }
#endif

                /* do nothing */
                break;
        }
        if (nts [0]) {
                mono_burg_kids (state, ern, kids);

                emit_state (cfg, kids [0], nts [0]);
                if (nts [1]) {
                        emit_state (cfg, kids [1], nts [1]);
                        if (nts [2]) {
                                g_assert (!nts [3]);
                                emit_state (cfg, kids [2], nts [2]);
                        }
                }
        }

//      g_print ("emit: %s (%p)\n", mono_burg_rule_string [ern], state);
        mono_burg_emit (ern, state, state->tree, cfg);
}

#define DEBUG_SELECTION

static void 
mini_select_instructions (MonoCompile *cfg)
{
        MonoBasicBlock *bb;
        
        cfg->state_pool = mono_mempool_new ();
        cfg->rs = mono_regstate_new ();

        for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
                if (bb->last_ins && MONO_IS_COND_BRANCH_OP (bb->last_ins) &&
                    bb->next_bb != bb->last_ins->inst_false_bb) {

                        /* we are careful when inverting, since bugs like #59580
                         * could show up when dealing with NaNs.
                         */
                        if (MONO_IS_COND_BRANCH_NOFP(bb->last_ins) && bb->next_bb == bb->last_ins->inst_true_bb) {
                                MonoBasicBlock *tmp =  bb->last_ins->inst_true_bb;
                                bb->last_ins->inst_true_bb = bb->last_ins->inst_false_bb;
                                bb->last_ins->inst_false_bb = tmp;

                                bb->last_ins->opcode = reverse_branch_op (bb->last_ins->opcode);
                        } else {                        
                                MonoInst *inst = mono_mempool_alloc0 (cfg->mempool, sizeof (MonoInst));
                                inst->opcode = OP_BR;
                                inst->inst_target_bb = bb->last_ins->inst_false_bb;
                                mono_bblock_add_inst (bb, inst);
                        }
                }
        }

#ifdef DEBUG_SELECTION
        if (cfg->verbose_level >= 4) {
        for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
                MonoInst *tree = bb->code;      
                g_print ("DUMP BLOCK %d:\n", bb->block_num);
                if (!tree)
                        continue;
                for (; tree; tree = tree->next) {
                        mono_print_tree (tree);
                        g_print ("\n");
                }
        }
        }
#endif

        for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
                MonoInst *tree = bb->code, *next;       
                MBState *mbstate;

                if (!tree)
                        continue;
                bb->code = NULL;
                bb->last_ins = NULL;
                
                cfg->cbb = bb;
                mono_regstate_reset (cfg->rs);

#ifdef DEBUG_SELECTION
                if (cfg->verbose_level >= 3)
                        g_print ("LABEL BLOCK %d:\n", bb->block_num);
#endif
                for (; tree; tree = next) {
                        next = tree->next;
#ifdef DEBUG_SELECTION
                        if (cfg->verbose_level >= 3) {
                                mono_print_tree (tree);
                                g_print ("\n");
                        }
#endif

                        if (!(mbstate = mono_burg_label (tree, cfg))) {
                                g_warning ("unable to label tree %p", tree);
                                mono_print_tree (tree);
                                g_print ("\n");                         
                                g_assert_not_reached ();
                        }
                        emit_state (cfg, mbstate, MB_NTERM_stmt);
                }
                bb->max_vreg = cfg->rs->next_vreg;

                if (bb->last_ins)
                        bb->last_ins->next = NULL;

                mono_mempool_empty (cfg->state_pool); 
        }
        mono_mempool_destroy (cfg->state_pool); 
}

void
mono_codegen (MonoCompile *cfg)
{
        MonoJumpInfo *patch_info;
        MonoBasicBlock *bb;
        int i, max_epilog_size;
        guint8 *code;

        for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
                cfg->spill_count = 0;
                /* we reuse dfn here */
                /* bb->dfn = bb_count++; */
                mono_arch_local_regalloc (cfg, bb);
        }

        if (cfg->prof_options & MONO_PROFILE_COVERAGE)
                cfg->coverage_info = mono_profiler_coverage_alloc (cfg->method, cfg->num_bblocks);

        code = mono_arch_emit_prolog (cfg);

        if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE)
                code = mono_arch_instrument_prolog (cfg, mono_profiler_method_enter, code, FALSE);

        cfg->code_len = code - cfg->native_code;
        cfg->prolog_end = cfg->code_len;

        mono_debug_open_method (cfg);

        /* emit code all basic blocks */
        for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
                bb->native_offset = cfg->code_len;
                mono_arch_output_basic_block (cfg, bb);

                if (bb == cfg->bb_exit) {
                        cfg->epilog_begin = cfg->code_len;

                        if (cfg->prof_options & MONO_PROFILE_ENTER_LEAVE) {
                                code = cfg->native_code + cfg->code_len;
                                code = mono_arch_instrument_epilog (cfg, mono_profiler_method_leave, code, FALSE);
                                cfg->code_len = code - cfg->native_code;
                                g_assert (cfg->code_len < cfg->code_size);
                        }

                        mono_arch_emit_epilog (cfg);
                }
        }

        mono_arch_emit_exceptions (cfg);

        max_epilog_size = 0;

        code = cfg->native_code + cfg->code_len;

        /* we always allocate code in cfg->domain->code_mp to increase locality */
        cfg->code_size = cfg->code_len + max_epilog_size;
        /* fixme: align to MONO_ARCH_CODE_ALIGNMENT */

        if (cfg->method->dynamic) {
                /* Allocate the code into a separate memory pool so it can be freed */
                cfg->dynamic_info = g_new0 (MonoJitDynamicMethodInfo, 1);
                cfg->dynamic_info->code_mp = mono_code_manager_new_dynamic ();
                mono_domain_lock (cfg->domain);
                mono_dynamic_code_hash_insert (cfg->domain, cfg->method, cfg->dynamic_info);
                mono_domain_unlock (cfg->domain);

                code = mono_code_manager_reserve (cfg->dynamic_info->code_mp, cfg->code_size);
        } else {
                mono_domain_lock (cfg->domain);
                code = mono_code_manager_reserve (cfg->domain->code_mp, cfg->code_size);
                mono_domain_unlock (cfg->domain);
        }

        memcpy (code, cfg->native_code, cfg->code_len);
        g_free (cfg->native_code);
        cfg->native_code = code;
        code = cfg->native_code + cfg->code_len;
  
        /* g_assert (((int)cfg->native_code & (MONO_ARCH_CODE_ALIGNMENT - 1)) == 0); */
        for (patch_info = cfg->patch_info; patch_info; patch_info = patch_info->next) {
                switch (patch_info->type) {
                case MONO_PATCH_INFO_ABS: {
                        MonoJitICallInfo *info = mono_find_jit_icall_by_addr (patch_info->data.target);
                        if (info) {
                                //printf ("TEST %s %p\n", info->name, patch_info->data.target);
                                if ((cfg->method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE) && 
                                        strstr (cfg->method->name, info->name))
                                        /*
                                         * This is an icall wrapper, and this is a call to the
                                         * wrapped function.
                                         */
                                        ;
                                else {
                                        /* for these array methods we currently register the same function pointer
                                         * since it's a vararg function. But this means that mono_find_jit_icall_by_addr ()
                                         * will return the incorrect one depending on the order they are registered.
                                         * See tests/test-arr.cs
                                         */
                                        if (strstr (info->name, "ves_array_new_va_") == NULL && strstr (info->name, "ves_array_element_address_") == NULL) {
                                                patch_info->type = MONO_PATCH_INFO_INTERNAL_METHOD;
                                                patch_info->data.name = info->name;
                                        }
                                }
                        }
                        else {
                                MonoVTable *vtable = mono_find_class_init_trampoline_by_addr (patch_info->data.target);
                                if (vtable) {
                                        patch_info->type = MONO_PATCH_INFO_CLASS_INIT;
                                        patch_info->data.klass = vtable->klass;
                                }
                        }
                        break;
                }
                case MONO_PATCH_INFO_SWITCH: {
                        gpointer *table;
                        if (cfg->method->dynamic) {
                                table = mono_code_manager_reserve (cfg->dynamic_info->code_mp, sizeof (gpointer) * patch_info->data.table->table_size);
                        } else {
                                mono_domain_lock (cfg->domain);
                                table = mono_code_manager_reserve (cfg->domain->code_mp, sizeof (gpointer) * patch_info->data.table->table_size);
                                mono_domain_unlock (cfg->domain);
                        }

                        if (!cfg->compile_aot)
                                /* In the aot case, the patch already points to the correct location */
                                patch_info->ip.i = patch_info->ip.label->inst_c0;
                        for (i = 0; i < patch_info->data.table->table_size; i++) {
                                table [i] = GINT_TO_POINTER (patch_info->data.table->table [i]->native_offset);
                        }
                        patch_info->data.table->table = (MonoBasicBlock**)table;
                        break;
                }
                default:
                        /* do nothing */
                        break;
                }
        }

#ifdef VALGRIND_JIT_REGISTER_MAP
if (valgrind_register){
                char* nm = mono_method_full_name (cfg->method, TRUE);
                VALGRIND_JIT_REGISTER_MAP (nm, cfg->native_code, cfg->native_code + cfg->code_len);
                g_free (nm);
        }
#endif
 
        if (cfg->verbose_level > 0) {
                char* nm = mono_method_full_name (cfg->method, TRUE);
                g_print ("Method %s emitted at %p to %p (code length %d) [%s]\n", 
                                 nm, 
                                 cfg->native_code, cfg->native_code + cfg->code_len, cfg->code_len, cfg->domain->friendly_name);
                g_free (nm);
        }

#ifdef MONO_ARCH_HAVE_SAVE_UNWIND_INFO
        mono_arch_save_unwind_info (cfg);
#endif
        
        mono_arch_patch_code (cfg->method, cfg->domain, cfg->native_code, cfg->patch_info, cfg->run_cctors);

        if (cfg->method->dynamic) {
                mono_code_manager_commit (cfg->dynamic_info->code_mp, cfg->native_code, cfg->code_size, cfg->code_len);
        } else {
                mono_domain_lock (cfg->domain);
                mono_code_manager_commit (cfg->domain->code_mp, cfg->native_code, cfg->code_size, cfg->code_len);
                mono_domain_unlock (cfg->domain);
        }
        
        mono_arch_flush_icache (cfg->native_code, cfg->code_len);

        mono_debug_close_method (cfg);
}



static void
remove_critical_edges (MonoCompile *cfg) {
        MonoBasicBlock *bb;
        MonoBasicBlock *previous_bb;
        
        if (cfg->verbose_level > 3) {
                for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
                        int i;
                        printf ("remove_critical_edges %s, BEFORE BB%d (in:", mono_method_full_name (cfg->method, TRUE), bb->block_num);
                        for (i = 0; i < bb->in_count; i++) {
                                printf (" %d", bb->in_bb [i]->block_num);
                        }
                        printf (") (out:");
                        for (i = 0; i < bb->out_count; i++) {
                                printf (" %d", bb->out_bb [i]->block_num);
                        }
                        printf (")");
                        if (bb->last_ins != NULL) {
                                printf (" ");
                                mono_print_tree (bb->last_ins);
                        }
                        printf ("\n");
                }
        }
        
        for (previous_bb = cfg->bb_entry, bb = previous_bb->next_bb; bb != NULL; previous_bb = previous_bb->next_bb, bb = bb->next_bb) {
                if (bb->in_count > 1) {
                        int in_bb_index;
                        for (in_bb_index = 0; in_bb_index < bb->in_count; in_bb_index++) {
                                MonoBasicBlock *in_bb = bb->in_bb [in_bb_index];
                                if (in_bb->out_count > 1) {
                                        MonoBasicBlock *new_bb = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoBasicBlock));
                                        new_bb->block_num = cfg->num_bblocks++;
//                                      new_bb->real_offset = bb->real_offset;
                                        new_bb->region = bb->region;
                                        
                                        /* Do not alter the CFG while altering the BB list */
                                        if (previous_bb->region == bb->region) {
                                                if (previous_bb != cfg->bb_entry) {
                                                        /* If previous_bb "followed through" to bb, */
                                                        /* keep it linked with a OP_BR */
                                                        if ((previous_bb->last_ins == NULL) ||
                                                                        ((previous_bb->last_ins->opcode != OP_BR) &&
                                                                        (! (MONO_IS_COND_BRANCH_OP (previous_bb->last_ins))) &&
                                                                        (previous_bb->last_ins->opcode != CEE_SWITCH))) {
                                                                int i;
                                                                /* Make sure previous_bb really falls through bb */
                                                                for (i = 0; i < previous_bb->out_count; i++) {
                                                                        if (previous_bb->out_bb [i] == bb) {
                                                                                MonoInst *jump;
                                                                                MONO_INST_NEW (cfg, jump, OP_BR);
                                                                                MONO_ADD_INS (previous_bb, jump);
                                                                                jump->cil_code = previous_bb->cil_code;
                                                                                jump->inst_target_bb = bb;
                                                                                break;
                                                                        }
                                                                }
                                                        }
                                                } else {
                                                        /* We cannot add any inst to the entry BB, so we must */
                                                        /* put a new BB in the middle to hold the OP_BR */
                                                        MonoInst *jump;
                                                        MonoBasicBlock *new_bb_after_entry = mono_mempool_alloc0 ((cfg)->mempool, sizeof (MonoBasicBlock));
                                                        new_bb_after_entry->block_num = cfg->num_bblocks++;
//                                                      new_bb_after_entry->real_offset = bb->real_offset;
                                                        new_bb_after_entry->region = bb->region;
                                                        
                                                        MONO_INST_NEW (cfg, jump, OP_BR);
                                                        MONO_ADD_INS (new_bb_after_entry, jump);
                                                        jump->cil_code = bb->cil_code;
                                                        jump->inst_target_bb = bb;
                                                        
                                                        previous_bb->next_bb = new_bb_after_entry;
                                                        previous_bb = new_bb_after_entry;
                                                        
                                                        if (cfg->verbose_level > 2) {
                                                                printf ("remove_critical_edges %s, added helper BB%d jumping to BB%d\n", mono_method_full_name (cfg->method, TRUE), new_bb_after_entry->block_num, bb->block_num);
                                                        }
                                                }
                                        }
                                        
                                        /* Insert new_bb in the BB list */
                                        previous_bb->next_bb = new_bb;
                                        new_bb->next_bb = bb;
                                        previous_bb = new_bb;
                                        
                                        /* Setup in_bb and out_bb */
                                        new_bb->in_bb = mono_mempool_alloc ((cfg)->mempool, sizeof (MonoBasicBlock*));
                                        new_bb->in_bb [0] = in_bb;
                                        new_bb->in_count = 1;
                                        new_bb->out_bb = mono_mempool_alloc ((cfg)->mempool, sizeof (MonoBasicBlock*));
                                        new_bb->out_bb [0] = bb;
                                        new_bb->out_count = 1;
                                        
                                        /* Relink in_bb and bb to (from) new_bb */
                                        replace_out_block (in_bb, bb, new_bb);
                                        replace_out_block_in_code (in_bb, bb, new_bb);
                                        replace_in_block (bb, in_bb, new_bb);
                                        
                                        if (cfg->verbose_level > 2) {
                                                printf ("remove_critical_edges %s, removed critical edge from BB%d to BB%d (added BB%d)\n", mono_method_full_name (cfg->method, TRUE), in_bb->block_num, bb->block_num, new_bb->block_num);
                                        }
                                }
                        }
                }
        }
        
        if (cfg->verbose_level > 3) {
                for (bb = cfg->bb_entry; bb; bb = bb->next_bb) {
                        int i;
                        printf ("remove_critical_edges %s, AFTER BB%d (in:", mono_method_full_name (cfg->method, TRUE), bb->block_num);
                        for (i = 0; i < bb->in_count; i++) {
                                printf (" %d", bb->in_bb [i]->block_num);
                        }
                        printf (") (out:");
                        for (i = 0; i < bb->out_count; i++) {
                                printf (" %d", bb->out_bb [i]->block_num);
                        }
                        printf (")");
                        if (bb->last_ins != NULL) {
                                printf (" ");
                                mono_print_tree (bb->last_ins);
                        }
                        printf ("\n");
                }
        }
}

/*
 * mini_method_compile:
 * @method: the method to compile
 * @opts: the optimization flags to use
 * @domain: the domain where the method will be compiled in
 * @run_cctors: whether we should run type ctors if possible
 * @compile_aot: whether this is an AOT compilation
 * @parts: debug flag
 *
 * Returns: a MonoCompile* pointer. Caller must check the exception_type
 * field in the returned struct to see if compilation succeded.
 */
MonoCompile*
mini_method_compile (MonoMethod *method, guint32 opts, MonoDomain *domain, gboolean run_cctors, gboolean compile_aot, int parts)
{
        MonoMethodHeader *header = mono_method_get_header (method);
        guint8 *ip;
        MonoCompile *cfg;
        MonoJitInfo *jinfo;
        int dfn = 0, i, code_size_ratio;
        gboolean deadce_has_run = FALSE;

        mono_jit_stats.methods_compiled++;
        if (mono_profiler_get_events () & MONO_PROFILE_JIT_COMPILATION)
                mono_profiler_method_jit (method);

        cfg = g_new0 (MonoCompile, 1);
        cfg->method = method;
        cfg->mempool = mono_mempool_new ();
        cfg->opt = opts;
        cfg->prof_options = mono_profiler_get_events ();
        cfg->run_cctors = run_cctors;
        cfg->domain = domain;
        cfg->verbose_level = mini_verbose;
        cfg->compile_aot = compile_aot;
        cfg->skip_visibility = method->skip_visibility;
        cfg->token_info_hash = g_hash_table_new (NULL, NULL);
        if (!header) {
                cfg->exception_type = MONO_EXCEPTION_INVALID_PROGRAM;
                cfg->exception_message = g_strdup_printf ("Missing or incorrect header for method %s", cfg->method->name);
                if (cfg->prof_options & MONO_PROFILE_JIT_COMPILATION)
                        mono_profiler_method_end_jit (method, NULL, MONO_PROFILE_FAILED);
                return cfg;
        }

        ip = (guint8 *)header->code;

        cfg->intvars = mono_mempool_alloc0 (cfg->mempool, sizeof (guint16) * STACK_MAX * header->max_stack);
        cfg->aliasing_info = NULL;
        
        if (cfg->verbose_level > 2)
                g_print ("converting method %s\n", mono_method_full_name (method, TRUE));

        /*
         * create MonoInst* which represents arguments and local variables
         */
        mono_compile_create_vars (cfg);

        if ((i = mono_method_to_ir (cfg, method, NULL, NULL, cfg->locals_start, NULL, NULL, NULL, 0, FALSE)) < 0) {
                if (cfg->prof_options & MONO_PROFILE_JIT_COMPILATION)
                        mono_profiler_method_end_jit (method, NULL, MONO_PROFILE_FAILED);
                /* cfg contains the details of the failure, so let the caller cleanup */
                return cfg;
        }

        mono_jit_stats.basic_blocks += cfg->num_bblocks;
        mono_jit_stats.max_basic_blocks = MAX (cfg->num_bblocks, mono_jit_stats.max_basic_blocks);

        if ((cfg->num_varinfo > 2000) && !cfg->compile_aot) {
                /* 
                 * we disable some optimizations if there are too many variables
                 * because JIT time may become too expensive. The actual number needs 
                 * to be tweaked and eventually the non-linear algorithms should be fixed.
                 */
                cfg->opt &= ~ (MONO_OPT_LINEARS | MONO_OPT_COPYPROP | MONO_OPT_CONSPROP);
                cfg->disable_ssa = TRUE;
        }

        /*g_print ("numblocks = %d\n", cfg->num_bblocks);*/

        if (cfg->opt & MONO_OPT_BRANCH)
                optimize_branches (cfg);

        if (cfg->opt & MONO_OPT_SSAPRE) {
                remove_critical_edges (cfg);
        }

        /* Depth-first ordering on basic blocks */
        cfg->bblocks = mono_mempool_alloc (cfg->mempool, sizeof (MonoBasicBlock*) * (cfg->num_bblocks + 1));

        df_visit (cfg->bb_entry, &dfn, cfg->bblocks);
        if (cfg->num_bblocks != dfn + 1) {
                MonoBasicBlock *bb;

                cfg->num_bblocks = dfn + 1;

                if (!header->clauses) {
                        /* remove unreachable code, because the code in them may be 
                         * inconsistent  (access to dead variables for example) */
                        for (bb = cfg->bb_entry; bb;) {
                                MonoBasicBlock *bbn = bb->next_bb;

                                if (bbn && bbn->region == -1 && !bbn->dfn) {
                                        if (cfg->verbose_level > 1)
                                                g_print ("found unreachable code in BB%d\n", bbn->block_num);
                                        bb->next_bb = bbn->next_bb;
                                        nullify_basic_block (bbn);                      
                                } else {
                                        bb = bb->next_bb;
                                }
                        }
                }
        }

        if (cfg->opt & MONO_OPT_LOOP) {
                mono_compile_dominator_info (cfg, MONO_COMP_DOM | MONO_COMP_IDOM);
                mono_compute_natural_loops (cfg);
        }

        /* after method_to_ir */
        if (parts == 1)
                return cfg;

//#define DEBUGSSA "logic_run"
#define DEBUGSSA_CLASS "Tests"
#ifdef DEBUGSSA

        if (!header->num_clauses && !cfg->disable_ssa) {
                mono_local_cprop (cfg);
                mono_ssa_compute (cfg);
        }
#else 

        /* fixme: add all optimizations which requires SSA */
        if (cfg->opt & (MONO_OPT_SSA | MONO_OPT_ABCREM | MONO_OPT_SSAPRE)) {
                if (!(cfg->comp_done & MONO_COMP_SSA) && !header->num_clauses && !cfg->disable_ssa) {
                        mono_local_cprop (cfg);
                        mono_ssa_compute (cfg);

                        if (cfg->verbose_level >= 2) {
                                print_dfn (cfg);
                        }
                }
        }
#endif

        /* after SSA translation */
        if (parts == 2)
                return cfg;

        if ((cfg->opt & MONO_OPT_CONSPROP) || (cfg->opt & MONO_OPT_COPYPROP)) {
                if (cfg->comp_done & MONO_COMP_SSA) {
                        mono_ssa_cprop (cfg);
                } else {
                        mono_local_cprop (cfg);
                }
        }

        if (cfg->comp_done & MONO_COMP_SSA) {                   
                //mono_ssa_deadce (cfg);

                //mono_ssa_strength_reduction (cfg);

                if (cfg->opt & MONO_OPT_SSAPRE) {
                        mono_perform_ssapre (cfg);
                        //mono_local_cprop (cfg);
                }
                
                if (cfg->opt & MONO_OPT_DEADCE) {
                        mono_ssa_deadce (cfg);
                        deadce_has_run = TRUE;
                }
                
                if ((cfg->flags & MONO_CFG_HAS_LDELEMA) && (cfg->opt & MONO_OPT_ABCREM))
                        mono_perform_abc_removal (cfg);
                
                mono_ssa_remove (cfg);

                if (cfg->opt & MONO_OPT_BRANCH)
                        optimize_branches (cfg);
        }

        /* after SSA removal */
        if (parts == 3)
                return cfg;

        if (cfg->verbose_level > 4) {
                printf ("BEFORE DECOMPSE START\n");
                mono_print_code (cfg);
                printf ("BEFORE DECOMPSE END\n");
        }
        
        decompose_pass (cfg);

        if (cfg->got_var) {
                GList *regs;

                g_assert (cfg->got_var_allocated);

                /* 
                 * Allways allocate the GOT var to a register, because keeping it
                 * in memory will increase the number of live temporaries in some
                 * code created by inssel.brg, leading to the well known spills+
                 * branches problem. Testcase: mcs crash in 
                 * System.MonoCustomAttrs:GetCustomAttributes.
                 */
                regs = mono_arch_get_global_int_regs (cfg);
                g_assert (regs);
                cfg->got_var->opcode = OP_REGVAR;
                cfg->got_var->dreg = GPOINTER_TO_INT (regs->data);
                cfg->used_int_regs |= 1LL << cfg->got_var->dreg;
                
                g_list_free (regs);
        }

        /* todo: remove code when we have verified that the liveness for try/catch blocks
         * works perfectly 
         */
        /* 
         * Currently, this can't be commented out since exception blocks are not
         * processed during liveness analysis.
         */
        mono_liveness_handle_exception_clauses (cfg);

        if (cfg->opt & MONO_OPT_LINEARS) {
                GList *vars, *regs;
                
                /* For now, compute aliasing info only if needed for deadce... */
                if ((cfg->opt & MONO_OPT_DEADCE) && (! deadce_has_run) && (header->num_clauses == 0)) {
                        cfg->aliasing_info = mono_build_aliasing_information (cfg);
                }

                /* fixme: maybe we can avoid to compute livenesss here if already computed ? */
                cfg->comp_done &= ~MONO_COMP_LIVENESS;
                if (!(cfg->comp_done & MONO_COMP_LIVENESS))
                        mono_analyze_liveness (cfg);

                if (cfg->aliasing_info != NULL) {
                        mono_aliasing_deadce (cfg->aliasing_info);
                        deadce_has_run = TRUE;
                }
                
                if ((vars = mono_arch_get_allocatable_int_vars (cfg))) {
                        regs = mono_arch_get_global_int_regs (cfg);
                        if (cfg->got_var)
                                regs = g_list_delete_link (regs, regs);
                        mono_linear_scan (cfg, vars, regs, &cfg->used_int_regs);
                }
                
                if (cfg->aliasing_info != NULL) {
                        mono_destroy_aliasing_information (cfg->aliasing_info);
                        cfg->aliasing_info = NULL;
                }
        }

        //mono_print_code (cfg);

    //print_dfn (cfg);
        
        /* variables are allocated after decompose, since decompose could create temps */
        mono_arch_allocate_vars (cfg);

        if (cfg->opt & MONO_OPT_CFOLD)
                mono_constant_fold (cfg);

        mini_select_instructions (cfg);

        mono_codegen (cfg);
        if (cfg->verbose_level >= 2) {
                char *id =  mono_method_full_name (cfg->method, FALSE);
                mono_disassemble_code (cfg, cfg->native_code, cfg->code_len, id + 3);
                g_free (id);
        }
        
        if (cfg->method->dynamic) {
                jinfo = g_malloc0 (sizeof (MonoJitInfo) + (header->num_clauses * sizeof (MonoJitExceptionInfo)));
        } else {
                /* we access cfg->domain->mp */
                mono_domain_lock (cfg->domain);
                jinfo = mono_mempool_alloc0 (cfg->domain->mp, sizeof (MonoJitInfo) + (header->num_clauses * sizeof (MonoJitExceptionInfo)));
                mono_domain_unlock (cfg->domain);
        }

        jinfo->method = method;
        jinfo->code_start = cfg->native_code;
        jinfo->code_size = cfg->code_len;
        jinfo->used_regs = cfg->used_int_regs;
        jinfo->domain_neutral = (cfg->opt & MONO_OPT_SHARED) != 0;
        jinfo->cas_inited = FALSE; /* initialization delayed at the first stalk walk using this method */

        if (header->num_clauses) {
                int i;

                jinfo->num_clauses = header->num_clauses;

                for (i = 0; i < header->num_clauses; i++) {
                        MonoExceptionClause *ec = &header->clauses [i];
                        MonoJitExceptionInfo *ei = &jinfo->clauses [i];
                        MonoBasicBlock *tblock;
                        MonoInst *exvar;

                        ei->flags = ec->flags;

                        exvar = mono_find_exvar_for_offset (cfg, ec->handler_offset);
                        ei->exvar_offset = exvar ? exvar->inst_offset : 0;

                        if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
                                tblock = cfg->cil_offset_to_bb [ec->data.filter_offset];
                                g_assert (tblock);
                                ei->data.filter = cfg->native_code + tblock->native_offset;
                        } else {
                                ei->data.catch_class = ec->data.catch_class;
                        }

                        tblock = cfg->cil_offset_to_bb [ec->try_offset];
                        g_assert (tblock);
                        ei->try_start = cfg->native_code + tblock->native_offset;
                        g_assert (tblock->native_offset);
                        tblock = cfg->cil_offset_to_bb [ec->try_offset + ec->try_len];
                        g_assert (tblock);
                        ei->try_end = cfg->native_code + tblock->native_offset;
                        g_assert (tblock->native_offset);
                        tblock = cfg->cil_offset_to_bb [ec->handler_offset];
                        g_assert (tblock);
                        ei->handler_start = cfg->native_code + tblock->native_offset;
                }
        }

        cfg->jit_info = jinfo;
#if defined(__arm__)
        mono_arch_fixup_jinfo (cfg);
#endif

        mono_domain_lock (cfg->domain);
        mono_jit_info_table_add (cfg->domain, jinfo);

        if (cfg->method->dynamic)
                mono_dynamic_code_hash_lookup (cfg->domain, cfg->method)->ji = jinfo;
        mono_domain_unlock (cfg->domain);

        /* collect statistics */
        mono_jit_stats.allocated_code_size += cfg->code_len;
        code_size_ratio = cfg->code_len;
        if (code_size_ratio > mono_jit_stats.biggest_method_size) {
                        mono_jit_stats.biggest_method_size = code_size_ratio;
                        mono_jit_stats.biggest_method = method;
        }
        code_size_ratio = (code_size_ratio * 100) / mono_method_get_header (method)->code_size;
        if (code_size_ratio > mono_jit_stats.max_code_size_ratio) {
                mono_jit_stats.max_code_size_ratio = code_size_ratio;
                mono_jit_stats.max_ratio_method = method;
        }
        mono_jit_stats.native_code_size += cfg->code_len;

        if (cfg->prof_options & MONO_PROFILE_JIT_COMPILATION)
                mono_profiler_method_end_jit (method, jinfo, MONO_PROFILE_OK);

        return cfg;
}

static gpointer
mono_jit_compile_method_inner (MonoMethod *method, MonoDomain *target_domain, int opt)
{
        MonoCompile *cfg;
        gpointer code = NULL;
        MonoJitInfo *info;

#ifdef MONO_USE_AOT_COMPILER
        if ((opt & MONO_OPT_AOT) && !(mono_profiler_get_events () & MONO_PROFILE_JIT_COMPILATION)) {
                MonoDomain *domain = mono_domain_get ();

                mono_class_init (method->klass);

                mono_domain_lock (domain);
                if ((code = mono_aot_get_method (domain, method))) {
                        mono_domain_unlock (domain);
                        mono_runtime_class_init (mono_class_vtable (domain, method->klass));
                        return code;
                }

                mono_domain_unlock (domain);
        }
#endif

        if ((method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL) ||
            (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL)) {
                MonoMethod *nm;
                MonoMethodPInvoke* piinfo = (MonoMethodPInvoke *) method;

                if (method->iflags & METHOD_IMPL_ATTRIBUTE_NATIVE && !MONO_CLASS_IS_IMPORT(method->klass))
                        g_error ("Method '%s' in assembly '%s' contains native code and mono can't run it. The assembly was probably created by Managed C++.\n", mono_method_full_name (method, TRUE), method->klass->image->name);

                if (!piinfo->addr) {
                        if (method->iflags & METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL)
                                piinfo->addr = mono_lookup_internal_call (method);
                        else
                                if (method->flags & METHOD_ATTRIBUTE_PINVOKE_IMPL)
                                        mono_lookup_pinvoke_call (method, NULL, NULL);
                }
                        nm = mono_marshal_get_native_wrapper (method);
                        return mono_get_addr_from_ftnptr (mono_compile_method (nm));

                        //if (mono_debug_format != MONO_DEBUG_FORMAT_NONE) 
                        //mono_debug_add_wrapper (method, nm);
        } else if ((method->iflags & METHOD_IMPL_ATTRIBUTE_RUNTIME)) {
                const char *name = method->name;
                MonoMethod *nm;

                if (method->klass->parent == mono_defaults.multicastdelegate_class) {
                        if (*name == '.' && (strcmp (name, ".ctor") == 0)) {
                                MonoJitICallInfo *mi = mono_find_jit_icall_by_name ("mono_delegate_ctor");
                                g_assert (mi);
                                return mono_get_addr_from_ftnptr ((gpointer)mono_icall_get_wrapper (mi));
                        } else if (*name == 'I' && (strcmp (name, "Invoke") == 0)) {
                                nm = mono_marshal_get_delegate_invoke (method);
                                        return mono_get_addr_from_ftnptr (mono_compile_method (nm));
                        } else if (*name == 'B' && (strcmp (name, "BeginInvoke") == 0)) {
                                nm = mono_marshal_get_delegate_begin_invoke (method);
                                return mono_get_addr_from_ftnptr (mono_compile_method (nm));
                        } else if (*name == 'E' && (strcmp (name, "EndInvoke") == 0)) {
                                nm = mono_marshal_get_delegate_end_invoke (method);
                                return mono_get_addr_from_ftnptr (mono_compile_method (nm));
                        }
                }
                return NULL;
        }

        cfg = mini_method_compile (method, opt, target_domain, TRUE, FALSE, 0);

        switch (cfg->exception_type) {
        case MONO_EXCEPTION_NONE: break;
        case MONO_EXCEPTION_TYPE_LOAD:
        case MONO_EXCEPTION_MISSING_FIELD:
        case MONO_EXCEPTION_MISSING_METHOD:
        case MONO_EXCEPTION_FILE_NOT_FOUND: {
                /* Throw a type load exception if needed */
                MonoLoaderError *error = mono_loader_get_last_error ();
                MonoException *ex;

                if (error) {
                        ex = mono_loader_error_prepare_exception (error);
                } else {
                        if (cfg->exception_ptr) {
                                ex = mono_class_get_exception_for_failure (cfg->exception_ptr);
                        } else {
                                if (cfg->exception_type == MONO_EXCEPTION_MISSING_FIELD)
                                        ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "MissingFieldException", cfg->exception_message);
                                else if (cfg->exception_type == MONO_EXCEPTION_MISSING_METHOD)
                                        ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "MissingMethodException", cfg->exception_message);
                                else if (cfg->exception_type == MONO_EXCEPTION_TYPE_LOAD)
                                        ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "TypeLoadException", cfg->exception_message);
                                else if (cfg->exception_type == MONO_EXCEPTION_FILE_NOT_FOUND)
                                        ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "FileNotFoundException", cfg->exception_message);
                                else
                                        g_assert_not_reached ();
                        }
                }
                mono_destroy_compile (cfg);
                mono_raise_exception (ex);
                break;
        }
        case MONO_EXCEPTION_INVALID_PROGRAM: {
                MonoException *ex = mono_exception_from_name_msg (mono_defaults.corlib, "System", "InvalidProgramException", cfg->exception_message);
                mono_destroy_compile (cfg);
                mono_raise_exception (ex);
                break;
        }
        case MONO_EXCEPTION_UNVERIFIABLE_IL: {
                MonoException *ex = mono_exception_from_name_msg (mono_defaults.corlib, "System.Security", "VerificationException", cfg->exception_message);
                mono_destroy_compile (cfg);
                mono_raise_exception (ex);
                break;
        }
        /* this can only be set if the security manager is active */
        case MONO_EXCEPTION_SECURITY_LINKDEMAND: {
                MonoAssembly *assembly = mono_image_get_assembly (method->klass->image);
                MonoReflectionAssembly *refass = (MonoReflectionAssembly*) mono_assembly_get_object (target_domain, assembly);
                MonoReflectionMethod *refmet = mono_method_get_object (target_domain, method, NULL);
                MonoSecurityManager* secman = mono_security_manager_get_methods ();
                MonoObject *exc = NULL;
                gpointer args [3];

                args [0] = &cfg->exception_data;
                args [1] = refass;
                args [2] = refmet;
                mono_runtime_invoke (secman->linkdemandsecurityexception, NULL, args, &exc);

                mono_destroy_compile (cfg);
                cfg = NULL;

                mono_raise_exception ((MonoException*)exc);
        }
        default:
                g_assert_not_reached ();
        }

        mono_domain_lock (target_domain);

        /* Check if some other thread already did the job. In this case, we can
       discard the code this thread generated. */

        if ((info = mono_internal_hash_table_lookup (&target_domain->jit_code_hash, method))) {
                /* We can't use a domain specific method in another domain */
                if ((target_domain == mono_domain_get ()) || info->domain_neutral) {
                        code = info->code_start;
//                      printf("Discarding code for method %s\n", method->name);
                }
        }
        
        if (code == NULL) {
                mono_internal_hash_table_insert (&target_domain->jit_code_hash, method, cfg->jit_info);
                code = cfg->native_code;
        }

        mono_destroy_compile (cfg);

        if (target_domain->jump_target_hash) {
                MonoJumpInfo patch_info;
                GSList *list, *tmp;
                list = g_hash_table_lookup (target_domain->jump_target_hash, method);
                if (list) {
                        patch_info.next = NULL;
                        patch_info.ip.i = 0;
                        patch_info.type = MONO_PATCH_INFO_METHOD_JUMP;
                        patch_info.data.method = method;
                        g_hash_table_remove (target_domain->jump_target_hash, method);
                }
                for (tmp = list; tmp; tmp = tmp->next)
                        mono_arch_patch_code (NULL, target_domain, tmp->data, &patch_info, TRUE);
                g_slist_free (list);
        }

        mono_domain_unlock (target_domain);

        mono_runtime_class_init (mono_class_vtable (target_domain, method->klass));
        return code;
}

static gpointer
mono_jit_compile_method_with_opt (MonoMethod *method, guint32 opt)
{
        MonoDomain *target_domain, *domain = mono_domain_get ();
        MonoJitInfo *info;
        gpointer p;
        MonoJitICallInfo *callinfo = NULL;

        /*
         * ICALL wrappers are handled specially, since there is only one copy of them
         * shared by all appdomains.
         */
        if ((method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE) && (strstr (method->name, "__icall_wrapper_") == method->name)) {
                const char *icall_name;

                icall_name = method->name + strlen ("__icall_wrapper_");
                g_assert (icall_name);
                callinfo = mono_find_jit_icall_by_name (icall_name);
                g_assert (callinfo);

                /* Must be domain neutral since there is only one copy */
                opt |= MONO_OPT_SHARED;
        }

        if (opt & MONO_OPT_SHARED)
                target_domain = mono_get_root_domain ();
        else 
                target_domain = domain;

        mono_domain_lock (target_domain);

        if ((info = mono_internal_hash_table_lookup (&target_domain->jit_code_hash, method))) {
                /* We can't use a domain specific method in another domain */
                if (! ((domain != target_domain) && !info->domain_neutral)) {
                        mono_domain_unlock (target_domain);
                        mono_jit_stats.methods_lookups++;
                        mono_runtime_class_init (mono_class_vtable (domain, method->klass));
                        return mono_create_ftnptr (target_domain, info->code_start);
                }
        }

        mono_domain_unlock (target_domain);
        p = mono_create_ftnptr (target_domain, mono_jit_compile_method_inner (method, target_domain, opt));

        if (callinfo) {
                mono_jit_lock ();
                if (!callinfo->wrapper) {
                        callinfo->wrapper = p;
                        mono_register_jit_icall_wrapper (callinfo, p);
                        mono_debug_add_icall_wrapper (method, callinfo);
                }
                mono_jit_unlock ();
        }

        return p;
}

static gpointer
mono_jit_compile_method (MonoMethod *method)
{
        return mono_jit_compile_method_with_opt (method, default_opt);
}

static void
invalidated_delegate_trampoline (char *desc)
{
        g_error ("Unmanaged code called delegate of type %s which was already garbage collected.\n"
                 "See http://www.go-mono.com/delegate.html for an explanation and ways to fix this.",
                 desc);
}

/*
 * mono_jit_free_method:
 *
 *  Free all memory allocated by the JIT for METHOD.
 */
static void
mono_jit_free_method (MonoDomain *domain, MonoMethod *method)
{
        MonoJitDynamicMethodInfo *ji;
        gboolean destroy = TRUE;

        g_assert (method->dynamic);

        mono_domain_lock (domain);
        ji = mono_dynamic_code_hash_lookup (domain, method);
        mono_domain_unlock (domain);

        if (!ji)
                return;
        mono_domain_lock (domain);
        g_hash_table_remove (domain->dynamic_code_hash, method);
        mono_internal_hash_table_remove (&domain->jit_code_hash, method);
        g_hash_table_remove (domain->jump_trampoline_hash, method);
        mono_domain_unlock (domain);

#ifdef MONO_ARCH_HAVE_INVALIDATE_METHOD
        if (debug_options.keep_delegates && method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
                /*
                 * Instead of freeing the code, change it to call an error routine
                 * so people can fix their code.
                 */
                char *type = mono_type_full_name (&method->klass->byval_arg);
                char *type_and_method = g_strdup_printf ("%s.%s", type, method->name);

                g_free (type);
                mono_arch_invalidate_method (ji->ji, invalidated_delegate_trampoline, type_and_method);
                destroy = FALSE;
        }
#endif

        /* 
         * This needs to be done before freeing code_mp, since the code address is the
         * key in the table, so if we free the code_mp first, another thread can grab the
         * same code address and replace our entry in the table.
         */
        mono_jit_info_table_remove (domain, ji->ji);

        if (destroy)
                mono_code_manager_destroy (ji->code_mp);
        mono_thread_hazardous_free_or_queue (ji->ji, g_free);
        g_free (ji);
}

static gpointer
mono_jit_find_compiled_method (MonoDomain *domain, MonoMethod *method)
{
        MonoDomain *target_domain;
        MonoJitInfo *info;

        if (default_opt & MONO_OPT_SHARED)
                target_domain = mono_get_root_domain ();
        else 
                target_domain = domain;

        mono_domain_lock (target_domain);

        if ((info = mono_internal_hash_table_lookup (&target_domain->jit_code_hash, method))) {
                /* We can't use a domain specific method in another domain */
                if (! ((domain != target_domain) && !info->domain_neutral)) {
                        mono_domain_unlock (target_domain);
                        mono_jit_stats.methods_lookups++;
                        return info->code_start;
                }
        }

        mono_domain_unlock (target_domain);

        return NULL;
}

/**
 * mono_jit_runtime_invoke:
 * @method: the method to invoke
 * @obj: this pointer
 * @params: array of parameter values.
 * @exc: used to catch exceptions objects
 */
static MonoObject*
mono_jit_runtime_invoke (MonoMethod *method, void *obj, void **params, MonoObject **exc)
{
        MonoMethod *invoke;
        MonoObject *(*runtime_invoke) (MonoObject *this, void **params, MonoObject **exc, void* compiled_method);
        void* compiled_method;

        if (obj == NULL && !(method->flags & METHOD_ATTRIBUTE_STATIC) && !method->string_ctor && (method->wrapper_type == 0)) {
                g_warning ("Ignoring invocation of an instance method on a NULL instance.\n");
                return NULL;
        }

        invoke = mono_marshal_get_runtime_invoke (method);
        runtime_invoke = mono_jit_compile_method (invoke);
        
        /* We need this here becuase mono_marshal_get_runtime_invoke can be place 
         * the helper method in System.Object and not the target class
         */
        mono_runtime_class_init (mono_class_vtable (mono_domain_get (), method->klass));

        compiled_method = mono_jit_compile_method (method);
        return runtime_invoke (obj, params, exc, compiled_method);
}

#ifdef MONO_GET_CONTEXT
#define GET_CONTEXT MONO_GET_CONTEXT
#endif

#ifndef GET_CONTEXT
#ifdef PLATFORM_WIN32
#define GET_CONTEXT \
        struct sigcontext *ctx = (struct sigcontext*)_dummy;
#else
#ifdef MONO_ARCH_USE_SIGACTION
#define GET_CONTEXT \
    void *ctx = context;
#elif defined(__sparc__)
#define GET_CONTEXT \
    void *ctx = sigctx;
#else
#define GET_CONTEXT \
        void **_p = (void **)&_dummy; \
        struct sigcontext *ctx = (struct sigcontext *)++_p;
#endif
#endif
#endif

#ifdef MONO_ARCH_USE_SIGACTION
#define SIG_HANDLER_SIGNATURE(ftn) ftn (int _dummy, siginfo_t *info, void *context)
#elif defined(__sparc__)
#define SIG_HANDLER_SIGNATURE(ftn) ftn (int _dummy, void *sigctx)
#else
#define SIG_HANDLER_SIGNATURE(ftn) ftn (int _dummy)
#endif

static void
SIG_HANDLER_SIGNATURE (sigfpe_signal_handler)
{
        MonoException *exc = NULL;
#ifndef MONO_ARCH_USE_SIGACTION
        void *info = NULL;
#endif
        GET_CONTEXT;

#if defined(MONO_ARCH_HAVE_IS_INT_OVERFLOW)
        if (mono_arch_is_int_overflow (ctx, info))
                exc = mono_get_exception_arithmetic ();
        else
                exc = mono_get_exception_divide_by_zero ();
#else
        exc = mono_get_exception_divide_by_zero ();
#endif
        
        mono_arch_handle_exception (ctx, exc, FALSE);
}

static void
SIG_HANDLER_SIGNATURE (sigill_signal_handler)
{
        MonoException *exc;
        GET_CONTEXT;

        exc = mono_get_exception_execution_engine ("SIGILL");
        
        mono_arch_handle_exception (ctx, exc, FALSE);
}

static void
SIG_HANDLER_SIGNATURE (sigsegv_signal_handler)
{
#ifndef MONO_ARCH_SIGSEGV_ON_ALTSTACK
        MonoException *exc = NULL;
#endif
        MonoJitInfo *ji;

#ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
        MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
#endif
        GET_CONTEXT;

#ifdef MONO_ARCH_USE_SIGACTION
        if (debug_options.collect_pagefault_stats) {
                if (mono_raw_buffer_is_pagefault (info->si_addr)) {
                        mono_raw_buffer_handle_pagefault (info->si_addr);
                        return;
                }
                if (mono_aot_is_pagefault (info->si_addr)) {
                        mono_aot_handle_pagefault (info->si_addr);
                        return;
                }
        }
#endif

        ji = mono_jit_info_table_find (mono_domain_get (), mono_arch_ip_from_context (ctx));

#ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
        /* we got a stack overflow in the soft-guard pages
         * There are two cases:
         * 1) managed code caused the overflow: we unprotect the soft-guard page
         * and let the arch-specific code trigger the exception handling mechanism
         * in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
         * 2) unmanaged code caused the overflow: we unprotect the soft-guard page
         * and hope we can continue with those enabled, at least until the hard-guard page
         * is hit. The alternative to continuing here is to just print a message and abort.
         * We may add in the future the code to protect the pages again in the codepath
         * when we return from unmanaged to managed code.
         */
        if (jit_tls->stack_ovf_guard_size && (guint8*)info->si_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
                        (guint8*)info->si_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
                mono_mprotect (jit_tls->stack_ovf_guard_base, jit_tls->stack_ovf_guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_EXEC);
                if (ji) {
                        mono_arch_handle_altstack_exception (ctx, info->si_addr, TRUE);
                } else {
                        /* We print a message: after this even managed stack overflows
                         * may crash the runtime
                         */
                        fprintf (stderr, "Stack overflow in unmanaged: IP: %p, fault addr: %p\n", mono_arch_ip_from_context (ctx), (gpointer)info->si_addr);
                }
                return;
        }
        /* The hard-guard page has been hit: there is not much we can do anymore
         * Print a hopefully clear message and abort.
         */
        if (jit_tls->stack_size && 
                        ABS ((guint8*)info->si_addr - ((guint8*)jit_tls->end_of_stack - jit_tls->stack_size)) < 32768) {
                const char *method;
                /* we don't do much now, but we can warn the user with a useful message */
                fprintf (stderr, "Stack overflow: IP: %p, fault addr: %p\n", mono_arch_ip_from_context (ctx), (gpointer)info->si_addr);
                if (ji && ji->method)
                        method = mono_method_full_name (ji->method, TRUE);
                else
                        method = "Unmanaged";
                fprintf (stderr, "At %s\n", method);
                abort ();
        } else {
                mono_arch_handle_altstack_exception (ctx, info->si_addr, FALSE);
        }
#else

        if (!ji) {
                mono_handle_native_sigsegv (SIGSEGV, ctx);
        }
                        
        mono_arch_handle_exception (ctx, exc, FALSE);
#endif
}

#ifndef PLATFORM_WIN32

static void
SIG_HANDLER_SIGNATURE (sigabrt_signal_handler)
{
        MonoJitInfo *ji;
        GET_CONTEXT;

        ji = mono_jit_info_table_find (mono_domain_get (), mono_arch_ip_from_context(ctx));
        if (!ji) {
                mono_handle_native_sigsegv (SIGABRT, ctx);
        }
}

static void
SIG_HANDLER_SIGNATURE (sigusr1_signal_handler)
{
        gboolean running_managed;
        MonoException *exc;
        MonoThread *thread = mono_thread_current ();
        void *ji;
        
        GET_CONTEXT;

        if (thread->thread_dump_requested) {
                thread->thread_dump_requested = FALSE;

                mono_print_thread_dump (ctx);
        }

        /*
         * FIXME:
         * This is an async signal, so the code below must not call anything which
         * is not async safe. That includes the pthread locking functions. If we
         * know that we interrupted managed code, then locking is safe.
         */
        ji = mono_jit_info_table_find (mono_domain_get (), mono_arch_ip_from_context(ctx));
        running_managed = ji != NULL;
        
        exc = mono_thread_request_interruption (running_managed); 
        if (!exc) return;

        mono_arch_handle_exception (ctx, exc, FALSE);
}

static void
SIG_HANDLER_SIGNATURE (sigprof_signal_handler)
{
        GET_CONTEXT;

        mono_profiler_stat_hit (mono_arch_ip_from_context (ctx), ctx);
}

static void
SIG_HANDLER_SIGNATURE (sigquit_signal_handler)
{
        GET_CONTEXT;

        printf ("Full thread dump:\n");

        mono_threads_request_thread_dump ();

        /*
         * print_thread_dump () skips the current thread, since sending a signal
         * to it would invoke the signal handler below the sigquit signal handler,
         * and signal handlers don't create an lmf, so the stack walk could not
         * be performed.
         */
        mono_print_thread_dump (ctx);
}

static void
SIG_HANDLER_SIGNATURE (sigusr2_signal_handler)
{
        gboolean enabled = mono_trace_is_enabled ();

        mono_trace_enable (!enabled);
}

#endif

static void
SIG_HANDLER_SIGNATURE (sigint_signal_handler)
{
        MonoException *exc;
        GET_CONTEXT;

        exc = mono_get_exception_execution_engine ("Interrupted (SIGINT).");
        
        mono_arch_handle_exception (ctx, exc, FALSE);
}

#ifdef PLATFORM_MACOSX

/*
 * This code disables the CrashReporter of MacOS X by installing
 * a dummy Mach exception handler.
 */

/*
 * http://darwinsource.opendarwin.org/10.4.3/xnu-792.6.22/osfmk/man/exc_server.html
 */
extern
boolean_t
exc_server (mach_msg_header_t *request_msg,
            mach_msg_header_t *reply_msg);

/*
 * The exception message
 */
typedef struct {
        mach_msg_base_t msg;  /* common mach message header */
        char payload [1024];  /* opaque */
} mach_exception_msg_t;

/* The exception port */
static mach_port_t mach_exception_port = VM_MAP_NULL;

/*
 * Implicitly called by exc_server. Must be public.
 *
 * http://darwinsource.opendarwin.org/10.4.3/xnu-792.6.22/osfmk/man/catch_exception_raise.html
 */
kern_return_t
catch_exception_raise (
        mach_port_t exception_port,
        mach_port_t thread,
        mach_port_t task,
        exception_type_t exception,
        exception_data_t code,
        mach_msg_type_number_t code_count)
{
        /* consume the exception */
        return KERN_FAILURE;
}

/*
 * Exception thread handler.
 */
static
void *
mach_exception_thread (void *arg)
{
        for (;;) {
                mach_exception_msg_t request;
                mach_exception_msg_t reply;
                mach_msg_return_t result;

                /* receive from "mach_exception_port" */
                result = mach_msg (&request.msg.header,
                                   MACH_RCV_MSG | MACH_RCV_LARGE,
                                   0,
                                   sizeof (request),
                                   mach_exception_port,
                                   MACH_MSG_TIMEOUT_NONE,
                                   MACH_PORT_NULL);

                g_assert (result == MACH_MSG_SUCCESS);

                /* dispatch to catch_exception_raise () */
                exc_server (&request.msg.header, &reply.msg.header);

                /* send back to sender */
                result = mach_msg (&reply.msg.header,
                                   MACH_SEND_MSG,
                                   reply.msg.header.msgh_size,
                                   0,
                                   MACH_PORT_NULL,
                                   MACH_MSG_TIMEOUT_NONE,
                                   MACH_PORT_NULL);

                g_assert (result == MACH_MSG_SUCCESS);
        }
        return NULL;
}

static void
macosx_register_exception_handler ()
{
        mach_port_t task;
        pthread_attr_t attr;
        pthread_t thread;

        if (mach_exception_port != VM_MAP_NULL)
                return;

        task = mach_task_self ();

        /* create the "mach_exception_port" with send & receive rights */
        g_assert (mach_port_allocate (task, MACH_PORT_RIGHT_RECEIVE,
                                      &mach_exception_port) == KERN_SUCCESS);
        g_assert (mach_port_insert_right (task, mach_exception_port, mach_exception_port,
                                          MACH_MSG_TYPE_MAKE_SEND) == KERN_SUCCESS);

        /* create the exception handler thread */
        g_assert (!pthread_attr_init (&attr));
        g_assert (!pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED));
        g_assert (!pthread_create (&thread, &attr, mach_exception_thread, NULL));
        pthread_attr_destroy (&attr);

        /*
         * register "mach_exception_port" as a receiver for the
         * EXC_BAD_ACCESS exception
         *
         * http://darwinsource.opendarwin.org/10.4.3/xnu-792.6.22/osfmk/man/task_set_exception_ports.html
         */
        g_assert (task_set_exception_ports (task, EXC_MASK_BAD_ACCESS,
                                            mach_exception_port,
                                            EXCEPTION_DEFAULT,
                                            MACHINE_THREAD_STATE) == KERN_SUCCESS);
}
#endif

#ifndef PLATFORM_WIN32
static void
add_signal_handler (int signo, gpointer handler)
{
        struct sigaction sa;

#ifdef MONO_ARCH_USE_SIGACTION
        sa.sa_sigaction = handler;
        sigemptyset (&sa.sa_mask);
        sa.sa_flags = SA_SIGINFO;
#ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
        if (signo == SIGSEGV)
                sa.sa_flags |= SA_ONSTACK;
#endif
#else
        sa.sa_handler = handler;
        sigemptyset (&sa.sa_mask);
        sa.sa_flags = 0;
#endif
        g_assert (sigaction (signo, &sa, NULL) != -1);
}

static void
remove_signal_handler (int signo)
{
        struct sigaction sa;

        sa.sa_handler = SIG_DFL;
        sigemptyset (&sa.sa_mask);
        sa.sa_flags = 0;

        g_assert (sigaction (signo, &sa, NULL) != -1);
}
#endif

static void
mono_runtime_install_handlers (void)
{
#ifdef PLATFORM_WIN32
        win32_seh_init();
        win32_seh_set_handler(SIGFPE, sigfpe_signal_handler);
        win32_seh_set_handler(SIGILL, sigill_signal_handler);
        win32_seh_set_handler(SIGSEGV, sigsegv_signal_handler);
        if (debug_options.handle_sigint)
                win32_seh_set_handler(SIGINT, sigint_signal_handler);

#else /* !PLATFORM_WIN32 */


#ifdef PLATFORM_MACOSX
        macosx_register_exception_handler ();
#endif

        if (debug_options.handle_sigint)
                add_signal_handler (SIGINT, sigint_signal_handler);

        add_signal_handler (SIGFPE, sigfpe_signal_handler);
        add_signal_handler (SIGQUIT, sigquit_signal_handler);
        add_signal_handler (SIGILL, sigill_signal_handler);
        add_signal_handler (SIGBUS, sigsegv_signal_handler);
        if (mono_jit_trace_calls != NULL)
                add_signal_handler (SIGUSR2, sigusr2_signal_handler);

        add_signal_handler (mono_thread_get_abort_signal (), sigusr1_signal_handler);
        signal (SIGPIPE, SIG_IGN);

        add_signal_handler (SIGABRT, sigabrt_signal_handler);

        /* catch SIGSEGV */
        add_signal_handler (SIGSEGV, sigsegv_signal_handler);
#endif /* PLATFORM_WIN32 */
}

static void
mono_runtime_cleanup_handlers (void)
{
#ifdef PLATFORM_WIN32
        win32_seh_cleanup();
#else
        if (debug_options.handle_sigint)
                remove_signal_handler (SIGINT);

        remove_signal_handler (SIGFPE);
        remove_signal_handler (SIGQUIT);
        remove_signal_handler (SIGILL);
        remove_signal_handler (SIGBUS);
        if (mono_jit_trace_calls != NULL)
                remove_signal_handler (SIGUSR2);

        remove_signal_handler (mono_thread_get_abort_signal ());

        remove_signal_handler (SIGABRT);

        remove_signal_handler (SIGSEGV);
#endif /* PLATFORM_WIN32 */
}


#ifdef HAVE_LINUX_RTC_H
#include <linux/rtc.h>
#include <sys/ioctl.h>
#include <fcntl.h>
static int rtc_fd = -1;

static int
enable_rtc_timer (gboolean enable)
{
        int flags;
        flags = fcntl (rtc_fd, F_GETFL);
        if (flags < 0) {
                perror ("getflags");
                return 0;
        }
        if (enable)
                flags |= FASYNC;
        else
                flags &= ~FASYNC;
        if (fcntl (rtc_fd, F_SETFL, flags) == -1) {
                perror ("setflags");
                return 0;
        }
        return 1;
}
#endif

#ifdef PLATFORM_WIN32
static HANDLE win32_main_thread;
static MMRESULT win32_timer;

static void CALLBACK
win32_time_proc (UINT uID, UINT uMsg, DWORD dwUser, DWORD dw1, DWORD dw2)
{
        CONTEXT context;

        context.ContextFlags = CONTEXT_CONTROL;
        if (GetThreadContext (win32_main_thread, &context)) {
#ifdef _WIN64
                mono_profiler_stat_hit ((guchar *) context.Rip, &context);
#else
                mono_profiler_stat_hit ((guchar *) context.Eip, &context);
#endif
        }
}
#endif

static void
setup_stat_profiler (void)
{
#ifdef ITIMER_PROF
        struct itimerval itval;
        static int inited = 0;
#ifdef HAVE_LINUX_RTC_H
        const char *rtc_freq;
        if (!inited && (rtc_freq = g_getenv ("MONO_RTC"))) {
                int freq = 0;
                inited = 1;
                if (*rtc_freq)
                        freq = atoi (rtc_freq);
                if (!freq)
                        freq = 1024;
                rtc_fd = open ("/dev/rtc", O_RDONLY);
                if (rtc_fd == -1) {
                        perror ("open /dev/rtc");
                        return;
                }
                add_signal_handler (SIGPROF, sigprof_signal_handler);
                if (ioctl (rtc_fd, RTC_IRQP_SET, freq) == -1) {
                        perror ("set rtc freq");
                        return;
                }
                if (ioctl (rtc_fd, RTC_PIE_ON, 0) == -1) {
                        perror ("start rtc");
                        return;
                }
                if (fcntl (rtc_fd, F_SETSIG, SIGPROF) == -1) {
                        perror ("setsig");
                        return;
                }
                if (fcntl (rtc_fd, F_SETOWN, getpid ()) == -1) {
                        perror ("setown");
                        return;
                }
                enable_rtc_timer (TRUE);
                return;
        }
        if (rtc_fd >= 0)
                return;
#endif

        itval.it_interval.tv_usec = 999;
        itval.it_interval.tv_sec = 0;
        itval.it_value = itval.it_interval;
        setitimer (ITIMER_PROF, &itval, NULL);
        if (inited)
                return;
        inited = 1;
        add_signal_handler (SIGPROF, sigprof_signal_handler);
#elif defined (PLATFORM_WIN32)
        static int inited = 0;
        TIMECAPS timecaps;

        if (inited)
                return;

        inited = 1;
        if (timeGetDevCaps (&timecaps, sizeof (timecaps)) != TIMERR_NOERROR)
                return;

        if ((win32_main_thread = OpenThread (READ_CONTROL | THREAD_GET_CONTEXT, FALSE, GetCurrentThreadId ())) == NULL)
                return;

        if (timeBeginPeriod (1) != TIMERR_NOERROR)
                return;

        if ((win32_timer = timeSetEvent (1, 0, win32_time_proc, 0, TIME_PERIODIC)) == 0) {
                timeEndPeriod (1);
                return;
        }
#endif
}

/* mono_jit_create_remoting_trampoline:
 * @method: pointer to the method info
 *
 * Creates a trampoline which calls the remoting functions. This
 * is used in the vtable of transparent proxies.
 * 
 * Returns: a pointer to the newly created code 
 */
static gpointer
mono_jit_create_remoting_trampoline (MonoMethod *method, MonoRemotingTarget target)
{
        MonoMethod *nm;
        guint8 *addr = NULL;

        if ((method->flags & METHOD_ATTRIBUTE_ABSTRACT) || 
            (mono_method_signature (method)->hasthis && (method->klass->marshalbyref || method->klass == mono_defaults.object_class))) {
                nm = mono_marshal_get_remoting_invoke_for_target (method, target);
                addr = mono_compile_method (nm);
        } else {
                addr = mono_compile_method (method);
        }
        return mono_get_addr_from_ftnptr (addr);
}

static void
mini_parse_debug_options (void)
{
        char *options = getenv ("MONO_DEBUG");
        gchar **args, **ptr;
        
        if (!options)
                return;

        args = g_strsplit (options, ",", -1);

        for (ptr = args; ptr && *ptr; ptr++) {
                const char *arg = *ptr;

                if (!strcmp (arg, "handle-sigint"))
                        debug_options.handle_sigint = TRUE;
                else if (!strcmp (arg, "keep-delegates"))
                        debug_options.keep_delegates = TRUE;
                else if (!strcmp (arg, "collect-pagefault-stats"))
                        debug_options.collect_pagefault_stats = TRUE;
                else if (!strcmp (arg, "break-on-unverified"))
                        debug_options.break_on_unverified = TRUE;
                else {
                        fprintf (stderr, "Invalid option for the MONO_DEBUG env variable: %s\n", arg);
                        fprintf (stderr, "Available options: 'handle-sigint', 'keep-delegates', 'collect-pagefault-stats', 'break-on-unverified'\n");
                        exit (1);
                }
        }
}

MonoDomain *
mini_init (const char *filename, const char *runtime_version)
{
        MonoDomain *domain;

#ifdef __linux__
        if (access ("/proc/self/maps", F_OK) != 0) {
                g_print ("Mono requires /proc to be mounted.\n");
                exit (1);
        }
#endif

        /* Happens when using the embedding interface */
        if (!default_opt_set)
                default_opt = mono_parse_default_optimizations (NULL);

        InitializeCriticalSection (&jit_mutex);

        global_codeman = mono_code_manager_new ();
        jit_icall_name_hash = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);

        mono_arch_cpu_init ();

        mono_init_trampolines ();

        mono_init_exceptions ();

        if (!g_thread_supported ())
                g_thread_init (NULL);

        if (getenv ("MONO_DEBUG") != NULL)
                mini_parse_debug_options ();

        /*
         * Handle the case when we are called from a thread different from the main thread,
         * confusing libgc.
         * FIXME: Move this to libgc where it belongs.
         *
         * we used to do this only when running on valgrind,
         * but it happens also in other setups.
         */
#if defined(HAVE_BOEHM_GC)
#if defined(HAVE_PTHREAD_GETATTR_NP) && defined(HAVE_PTHREAD_ATTR_GETSTACK)
        {
                size_t size;
                void *sstart;
                pthread_attr_t attr;
                pthread_getattr_np (pthread_self (), &attr);
                pthread_attr_getstack (&attr, &sstart, &size);
                pthread_attr_destroy (&attr); 
                /*g_print ("stackbottom pth is: %p\n", (char*)sstart + size);*/
#ifdef __ia64__
                /*
                 * The calculation above doesn't seem to work on ia64, also we need to set
                 * GC_register_stackbottom as well, but don't know how.
                 */
#else
                /* apparently with some linuxthreads implementations sstart can be NULL,
                 * fallback to the more imprecise method (bug# 78096).
                 */
                if (sstart) {
                        GC_stackbottom = (char*)sstart + size;
                } else {
                        gsize stack_bottom = (gsize)&domain;
                        stack_bottom += 4095;
                        stack_bottom &= ~4095;
                        GC_stackbottom = (char*)stack_bottom;
                }
#endif
        }
#elif defined(HAVE_PTHREAD_GET_STACKSIZE_NP) && defined(HAVE_PTHREAD_GET_STACKADDR_NP)
                GC_stackbottom = (char*)pthread_get_stackaddr_np (pthread_self ());
#else
        {
                gsize stack_bottom = (gsize)&domain;
                stack_bottom += 4095;
                stack_bottom &= ~4095;
                /*g_print ("stackbottom is: %p\n", (char*)stack_bottom);*/
                GC_stackbottom = (char*)stack_bottom;
        }
#endif
#endif
        MONO_GC_PRE_INIT ();

        mono_jit_tls_id = TlsAlloc ();
        setup_jit_tls_data ((gpointer)-1, mono_thread_abort);

        mono_burg_init ();

        if (default_opt & MONO_OPT_AOT)
                mono_aot_init ();

        mono_runtime_install_handlers ();
        mono_threads_install_cleanup (mini_thread_cleanup);

#define JIT_TRAMPOLINES_WORK
#ifdef JIT_TRAMPOLINES_WORK
        mono_install_compile_method (mono_jit_compile_method);
        mono_install_free_method (mono_jit_free_method);
        mono_install_trampoline (mono_create_jit_trampoline);
        mono_install_remoting_trampoline (mono_jit_create_remoting_trampoline);
        mono_install_delegate_trampoline (mono_create_delegate_trampoline);
#endif
#define JIT_INVOKE_WORKS
#ifdef JIT_INVOKE_WORKS
        mono_install_runtime_invoke (mono_jit_runtime_invoke);
        mono_install_handler (mono_arch_get_throw_exception ());
#endif
        mono_install_stack_walk (mono_jit_walk_stack);
        mono_install_init_vtable (mono_aot_init_vtable);
        mono_install_get_cached_class_info (mono_aot_get_cached_class_info);
        mono_install_get_class_from_name (mono_aot_get_class_from_name);
        mono_install_jit_info_find_in_aot (mono_aot_find_jit_info);

#ifdef MONO_ARCH_HAVE_IMT
        mono_install_imt_thunk_builder (mono_arch_build_imt_thunk);
#endif
        if (debug_options.collect_pagefault_stats) {
                mono_raw_buffer_set_make_unreadable (TRUE);
                mono_aot_set_make_unreadable (TRUE);
        }

        if (runtime_version)
                domain = mono_init_version (filename, runtime_version);
        else
                domain = mono_init_from_assembly (filename, filename);
        mono_icall_init ();

        mono_add_internal_call ("System.Diagnostics.StackFrame::get_frame_info", 
                                ves_icall_get_frame_info);
        mono_add_internal_call ("System.Diagnostics.StackTrace::get_trace", 
                                ves_icall_get_trace);
        mono_add_internal_call ("System.Exception::get_trace", 
                                ves_icall_System_Exception_get_trace);
        mono_add_internal_call ("System.Security.SecurityFrame::_GetSecurityFrame",
                                ves_icall_System_Security_SecurityFrame_GetSecurityFrame);
        mono_add_internal_call ("System.Security.SecurityFrame::_GetSecurityStack",
                                ves_icall_System_Security_SecurityFrame_GetSecurityStack);
        mono_add_internal_call ("Mono.Runtime::mono_runtime_install_handlers", 
                                mono_runtime_install_handlers);


        create_helper_signature ();

#define JIT_CALLS_WORK
#ifdef JIT_CALLS_WORK
        /* Needs to be called here since register_jit_icall depends on it */
        mono_marshal_init ();

        mono_arch_register_lowlevel_calls ();
        register_icall (mono_profiler_method_enter, "mono_profiler_method_enter", NULL, TRUE);
        register_icall (mono_profiler_method_leave, "mono_profiler_method_leave", NULL, TRUE);
        register_icall (mono_trace_enter_method, "mono_trace_enter_method", NULL, TRUE);
        register_icall (mono_trace_leave_method, "mono_trace_leave_method", NULL, TRUE);
        register_icall (mono_get_lmf_addr, "mono_get_lmf_addr", "ptr", TRUE);
        register_icall (mono_jit_thread_attach, "mono_jit_thread_attach", "void", TRUE);
        register_icall (mono_domain_get, "mono_domain_get", "ptr", TRUE);

        register_icall (mono_arch_get_throw_exception (), "mono_arch_throw_exception", "void object", TRUE);
        register_icall (mono_arch_get_rethrow_exception (), "mono_arch_rethrow_exception", "void object", TRUE);
        register_icall (mono_arch_get_throw_exception_by_name (), "mono_arch_throw_exception_by_name", "void ptr", TRUE); 
#if MONO_ARCH_HAVE_THROW_CORLIB_EXCEPTION
        register_icall (mono_arch_get_throw_corlib_exception (), "mono_arch_throw_corlib_exception", 
                                 "void ptr", TRUE);
#endif
        register_icall (mono_thread_get_pending_exception, "mono_thread_get_pending_exception", "object", FALSE);
        register_icall (mono_thread_interruption_checkpoint, "mono_thread_interruption_checkpoint", "void", FALSE);
        register_icall (mono_thread_force_interruption_checkpoint, "mono_thread_force_interruption_checkpoint", "void", FALSE);
        register_icall (mono_load_remote_field_new, "mono_load_remote_field_new", "object object ptr ptr", FALSE);
        register_icall (mono_store_remote_field_new, "mono_store_remote_field_new", "void object ptr ptr object", FALSE);

        /* 
         * NOTE, NOTE, NOTE, NOTE:
         * when adding emulation for some opcodes, remember to also add a dummy
         * rule to the burg files, because we need the arity information to be correct.
         */
#ifndef MONO_ARCH_NO_EMULATE_LONG_MUL_OPTS
        mono_register_opcode_emulation (OP_LMUL, "__emul_lmul", "long long long", mono_llmult, TRUE);
        mono_register_opcode_emulation (OP_LDIV, "__emul_ldiv", "long long long", mono_lldiv, FALSE);
        mono_register_opcode_emulation (OP_LDIV_UN, "__emul_ldiv_un", "long long long", mono_lldiv_un, FALSE);
        mono_register_opcode_emulation (OP_LREM, "__emul_lrem", "long long long", mono_llrem, FALSE);
        mono_register_opcode_emulation (OP_LREM_UN, "__emul_lrem_un", "long long long", mono_llrem_un, FALSE);
        mono_register_opcode_emulation (OP_LMUL_OVF_UN, "__emul_lmul_ovf_un", "long long long", mono_llmult_ovf_un, FALSE);
        mono_register_opcode_emulation (OP_LMUL_OVF, "__emul_lmul_ovf", "long long long", mono_llmult_ovf, FALSE);
#endif

#ifndef MONO_ARCH_NO_EMULATE_LONG_SHIFT_OPS
        mono_register_opcode_emulation (OP_LSHL, "__emul_lshl", "long long int32", mono_lshl, TRUE);
        mono_register_opcode_emulation (OP_LSHR, "__emul_lshr", "long long int32", mono_lshr, TRUE);
        mono_register_opcode_emulation (OP_LSHR_UN, "__emul_lshr_un", "long long int32", mono_lshr_un, TRUE);
#endif

#if defined(MONO_ARCH_EMULATE_MUL_DIV) || defined(MONO_ARCH_EMULATE_DIV)
        mono_register_opcode_emulation (CEE_DIV, "__emul_idiv", "int32 int32 int32", mono_idiv, FALSE);
        mono_register_opcode_emulation (CEE_DIV_UN, "__emul_idiv_un", "int32 int32 int32", mono_idiv_un, FALSE);
        mono_register_opcode_emulation (CEE_REM, "__emul_irem", "int32 int32 int32", mono_irem, FALSE);
        mono_register_opcode_emulation (CEE_REM_UN, "__emul_irem_un", "int32 int32 int32", mono_irem_un, FALSE);
#endif

#ifdef MONO_ARCH_EMULATE_MUL_DIV
        mono_register_opcode_emulation (CEE_MUL_OVF, "__emul_imul_ovf", "int32 int32 int32", mono_imul_ovf, FALSE);
        mono_register_opcode_emulation (CEE_MUL_OVF_UN, "__emul_imul_ovf_un", "int32 int32 int32", mono_imul_ovf_un, FALSE);
        mono_register_opcode_emulation (CEE_MUL, "__emul_imul", "int32 int32 int32", mono_imul, TRUE);
#endif
#if defined(MONO_ARCH_EMULATE_MUL_DIV) || defined(MONO_ARCH_SOFT_FLOAT)
        mono_register_opcode_emulation (OP_FDIV, "__emul_fdiv", "double double double", mono_fdiv, FALSE);
#endif

        mono_register_opcode_emulation (OP_FCONV_TO_U8, "__emul_fconv_to_u8", "ulong double", mono_fconv_u8, FALSE);
        mono_register_opcode_emulation (OP_FCONV_TO_U4, "__emul_fconv_to_u4", "uint32 double", mono_fconv_u4, FALSE);
        mono_register_opcode_emulation (OP_FCONV_TO_OVF_I8, "__emul_fconv_to_ovf_i8", "long double", mono_fconv_ovf_i8, FALSE);
        mono_register_opcode_emulation (OP_FCONV_TO_OVF_U8, "__emul_fconv_to_ovf_u8", "ulong double", mono_fconv_ovf_u8, FALSE);

#ifdef MONO_ARCH_EMULATE_FCONV_TO_I8
        mono_register_opcode_emulation (OP_FCONV_TO_I8, "__emul_fconv_to_i8", "long double", mono_fconv_i8, FALSE);
#endif
#ifdef MONO_ARCH_EMULATE_CONV_R8_UN
        mono_register_opcode_emulation (CEE_CONV_R_UN, "__emul_conv_r_un", "double int32", mono_conv_to_r8_un, FALSE);
#endif
#ifdef MONO_ARCH_EMULATE_LCONV_TO_R8
        mono_register_opcode_emulation (OP_LCONV_TO_R8, "__emul_lconv_to_r8", "double long", mono_lconv_to_r8, FALSE);
#endif
#ifdef MONO_ARCH_EMULATE_LCONV_TO_R4
        mono_register_opcode_emulation (OP_LCONV_TO_R4, "__emul_lconv_to_r4", "float long", mono_lconv_to_r4, FALSE);
#endif
#ifdef MONO_ARCH_EMULATE_LCONV_TO_R8_UN
        mono_register_opcode_emulation (OP_LCONV_TO_R_UN, "__emul_lconv_to_r8_un", "double long", mono_lconv_to_r8_un, FALSE);
#endif
#ifdef MONO_ARCH_EMULATE_FREM
        mono_register_opcode_emulation (OP_FREM, "__emul_frem", "double double double", fmod, FALSE);
#endif

#ifdef MONO_ARCH_SOFT_FLOAT
        mono_register_opcode_emulation (OP_FSUB, "__emul_fsub", "double double double", mono_fsub, FALSE);
        mono_register_opcode_emulation (OP_FADD, "__emul_fadd", "double double double", mono_fadd, FALSE);
        mono_register_opcode_emulation (OP_FMUL, "__emul_fmul", "double double double", mono_fmul, FALSE);
        mono_register_opcode_emulation (OP_FNEG, "__emul_fneg", "double double", mono_fneg, FALSE);
        mono_register_opcode_emulation (CEE_CONV_R8, "__emul_conv_r8", "double int32", mono_conv_to_r8, FALSE);
        mono_register_opcode_emulation (CEE_CONV_R4, "__emul_conv_r4", "double int32", mono_conv_to_r4, FALSE);
        mono_register_opcode_emulation (OP_FCONV_TO_R4, "__emul_fconv_to_r4", "double double", mono_fconv_r4, FALSE);
        mono_register_opcode_emulation (OP_FCONV_TO_I1, "__emul_fconv_to_i1", "int8 double", mono_fconv_i1, FALSE);
        mono_register_opcode_emulation (OP_FCONV_TO_I2, "__emul_fconv_to_i2", "int16 double", mono_fconv_i2, FALSE);
        mono_register_opcode_emulation (OP_FCONV_TO_I4, "__emul_fconv_to_i4", "int32 double", mono_fconv_i4, FALSE);
        mono_register_opcode_emulation (OP_FCONV_TO_U1, "__emul_fconv_to_u1", "uint8 double", mono_fconv_u1, FALSE);
        mono_register_opcode_emulation (OP_FCONV_TO_U2, "__emul_fconv_to_u2", "uint16 double", mono_fconv_u2, FALSE);

        mono_register_opcode_emulation (OP_FBEQ, "__emul_fcmp_eq", "uint32 double double", mono_fcmp_eq, FALSE);
        mono_register_opcode_emulation (OP_FBLT, "__emul_fcmp_lt", "uint32 double double", mono_fcmp_lt, FALSE);
        mono_register_opcode_emulation (OP_FBGT, "__emul_fcmp_gt", "uint32 double double", mono_fcmp_gt, FALSE);
        mono_register_opcode_emulation (OP_FBLE, "__emul_fcmp_le", "uint32 double double", mono_fcmp_le, FALSE);
        mono_register_opcode_emulation (OP_FBGE, "__emul_fcmp_ge", "uint32 double double", mono_fcmp_ge, FALSE);
        mono_register_opcode_emulation (OP_FBNE_UN, "__emul_fcmp_ne_un", "uint32 double double", mono_fcmp_ne_un, FALSE);
        mono_register_opcode_emulation (OP_FBLT_UN, "__emul_fcmp_lt_un", "uint32 double double", mono_fcmp_lt_un, FALSE);
        mono_register_opcode_emulation (OP_FBGT_UN, "__emul_fcmp_gt_un", "uint32 double double", mono_fcmp_gt_un, FALSE);
        mono_register_opcode_emulation (OP_FBLE_UN, "__emul_fcmp_le_un", "uint32 double double", mono_fcmp_le_un, FALSE);
        mono_register_opcode_emulation (OP_FBGE_UN, "__emul_fcmp_ge_un", "uint32 double double", mono_fcmp_ge_un, FALSE);

        mono_register_opcode_emulation (OP_FCEQ, "__emul_fcmp_ceq", "uint32 double double", mono_fceq, FALSE);
        mono_register_opcode_emulation (OP_FCGT, "__emul_fcmp_cgt", "uint32 double double", mono_fcgt, FALSE);
        mono_register_opcode_emulation (OP_FCGT_UN, "__emul_fcmp_cgt_un", "uint32 double double", mono_fcgt_un, FALSE);
        mono_register_opcode_emulation (OP_FCLT, "__emul_fcmp_clt", "uint32 double double", mono_fclt, FALSE);
        mono_register_opcode_emulation (OP_FCLT_UN, "__emul_fcmp_clt_un", "uint32 double double", mono_fclt_un, FALSE);

        register_icall (mono_fload_r4, "mono_fload_r4", "double ptr", FALSE);
        register_icall (mono_fstore_r4, "mono_fstore_r4", "void double ptr", FALSE);
        register_icall (mono_fload_r4_arg, "mono_fload_r4_arg", "uint32 double", FALSE);
#endif

#if SIZEOF_VOID_P == 4
        mono_register_opcode_emulation (OP_FCONV_TO_U, "__emul_fconv_to_u", "uint32 double", mono_fconv_u4, TRUE);
#endif

        /* other jit icalls */
        register_icall (mono_delegate_ctor, "mono_delegate_ctor", "void object object ptr", FALSE);
        register_icall (mono_class_static_field_address , "mono_class_static_field_address", 
                                 "ptr ptr ptr", FALSE);
        register_icall (mono_ldtoken_wrapper, "mono_ldtoken_wrapper", "ptr ptr ptr ptr", FALSE);
        register_icall (mono_get_special_static_data, "mono_get_special_static_data", "ptr int", FALSE);
        register_icall (mono_ldstr, "mono_ldstr", "object ptr ptr int32", FALSE);
        register_icall (mono_helper_stelem_ref_check, "helper_stelem_ref_check", "void object object", FALSE);
        register_icall (mono_object_new, "mono_object_new", "object ptr ptr", FALSE);
        register_icall (mono_object_new_specific, "mono_object_new_specific", "object ptr", FALSE);
        register_icall (mono_array_new, "mono_array_new", "object ptr ptr int32", FALSE);
        register_icall (mono_array_new_specific, "mono_array_new_specific", "object ptr int32", FALSE);
        register_icall (mono_runtime_class_init, "mono_runtime_class_init", "void ptr", FALSE);
        register_icall (mono_ldftn, "mono_ldftn", "ptr ptr", FALSE);
        register_icall (mono_ldftn_nosync, "mono_ldftn_nosync", "ptr ptr", FALSE);
        register_icall (mono_ldvirtfn, "mono_ldvirtfn", "ptr object ptr", FALSE);
        register_icall (mono_helper_compile_generic_method, "compile_generic_method", "ptr object ptr ptr ptr", FALSE);
        register_icall (mono_helper_ldstr, "helper_ldstr", "object ptr int", FALSE);
        register_icall (mono_helper_ldstr_mscorlib, "helper_ldstr_mscorlib", "object int", FALSE);
        register_icall (mono_helper_newobj_mscorlib, "helper_newobj_mscorlib", "object int", FALSE);
        register_icall (mono_value_copy, "mono_value_copy", "void ptr ptr ptr", FALSE);
#endif

#define JIT_RUNTIME_WORKS
#ifdef JIT_RUNTIME_WORKS
        mono_install_runtime_cleanup ((MonoDomainFunc)mini_cleanup);
        mono_runtime_init (domain, mono_thread_start_cb, mono_thread_attach_cb);
#endif

        mono_thread_attach (domain);
        return domain;
}

MonoJitStats mono_jit_stats = {0};

static void 
print_jit_stats (void)
{
        if (mono_jit_stats.enabled) {
                g_print ("Mono Jit statistics\n");
                g_print ("Compiled methods:       %ld\n", mono_jit_stats.methods_compiled);
                g_print ("Methods from AOT:       %ld\n", mono_jit_stats.methods_aot);
                g_print ("Methods cache lookup:   %ld\n", mono_jit_stats.methods_lookups);
                g_print ("Method trampolines:     %ld\n", mono_jit_stats.method_trampolines);
                g_print ("Basic blocks:           %ld\n", mono_jit_stats.basic_blocks);
                g_print ("Max basic blocks:       %ld\n", mono_jit_stats.max_basic_blocks);
                g_print ("Allocated vars:         %ld\n", mono_jit_stats.allocate_var);
                g_print ("Analyze stack repeat:   %ld\n", mono_jit_stats.analyze_stack_repeat);
                g_print ("Compiled CIL code size: %ld\n", mono_jit_stats.cil_code_size);
                g_print ("Native code size:       %ld\n", mono_jit_stats.native_code_size);
                g_print ("Max code size ratio:    %.2f (%s::%s)\n", mono_jit_stats.max_code_size_ratio/100.0,
                                mono_jit_stats.max_ratio_method->klass->name, mono_jit_stats.max_ratio_method->name);
                g_print ("Biggest method:         %ld (%s::%s)\n", mono_jit_stats.biggest_method_size,
                                mono_jit_stats.biggest_method->klass->name, mono_jit_stats.biggest_method->name);
                g_print ("Code reallocs:          %ld\n", mono_jit_stats.code_reallocs);
                g_print ("Allocated code size:    %ld\n", mono_jit_stats.allocated_code_size);
                g_print ("Inlineable methods:     %ld\n", mono_jit_stats.inlineable_methods);
                g_print ("Inlined methods:        %ld\n", mono_jit_stats.inlined_methods);
                g_print ("Locals stack size:      %ld\n", mono_jit_stats.locals_stack_size);

                g_print ("\nCreated object count:   %ld\n", mono_stats.new_object_count);
                g_print ("Initialized classes:    %ld\n", mono_stats.initialized_class_count);
                g_print ("Used classes:           %ld\n", mono_stats.used_class_count);
                g_print ("Generic vtables:        %ld\n", mono_stats.generic_vtable_count);
                g_print ("Methods:                %ld\n", mono_stats.method_count);
                g_print ("Static data size:       %ld\n", mono_stats.class_static_data_size);
                g_print ("VTable data size:       %ld\n", mono_stats.class_vtable_size);
                g_print ("Mscorlib mempool size:  %d\n", mono_mempool_get_allocated (mono_defaults.corlib->mempool));

                g_print ("\nGeneric instances:      %ld\n", mono_stats.generic_instance_count);
                g_print ("Initialized classes:    %ld\n", mono_stats.generic_class_count);
                g_print ("Inflated methods:       %ld / %ld\n", mono_stats.inflated_method_count_2,
                         mono_stats.inflated_method_count);
                g_print ("Inflated types:         %ld\n", mono_stats.inflated_type_count);
                g_print ("Generics metadata size: %ld\n", mono_stats.generics_metadata_size);
                g_print ("Generics virtual invokes: %ld\n", mono_jit_stats.generic_virtual_invocations);

                g_print ("Dynamic code allocs:    %ld\n", mono_stats.dynamic_code_alloc_count);
                g_print ("Dynamic code bytes:     %ld\n", mono_stats.dynamic_code_bytes_count);
                g_print ("Dynamic code frees:     %ld\n", mono_stats.dynamic_code_frees_count);

                g_print ("IMT tables size:        %ld\n", mono_stats.imt_tables_size);
                g_print ("IMT number of tables:   %ld\n", mono_stats.imt_number_of_tables);
                g_print ("IMT number of methods:  %ld\n", mono_stats.imt_number_of_methods);
                g_print ("IMT used slots:         %ld\n", mono_stats.imt_used_slots);
                g_print ("IMT colliding slots:    %ld\n", mono_stats.imt_slots_with_collisions);
                g_print ("IMT max collisions:     %ld\n", mono_stats.imt_max_collisions_in_slot);
                g_print ("IMT methods at max col: %ld\n", mono_stats.imt_method_count_when_max_collisions);
                g_print ("IMT thunks size:        %ld\n", mono_stats.imt_thunks_size);

                g_print ("JIT info table inserts: %ld\n", mono_stats.jit_info_table_insert_count);
                g_print ("JIT info table removes: %ld\n", mono_stats.jit_info_table_remove_count);
                g_print ("JIT info table lookups: %ld\n", mono_stats.jit_info_table_lookup_count);

                g_print ("Hazardous pointers:     %ld\n", mono_stats.hazardous_pointer_count);

                if (mono_security_get_mode () == MONO_SECURITY_MODE_CAS) {
                        g_print ("\nDecl security check   : %ld\n", mono_jit_stats.cas_declsec_check);
                        g_print ("LinkDemand (user)     : %ld\n", mono_jit_stats.cas_linkdemand);
                        g_print ("LinkDemand (icall)    : %ld\n", mono_jit_stats.cas_linkdemand_icall);
                        g_print ("LinkDemand (pinvoke)  : %ld\n", mono_jit_stats.cas_linkdemand_pinvoke);
                        g_print ("LinkDemand (aptc)     : %ld\n", mono_jit_stats.cas_linkdemand_aptc);
                        g_print ("Demand (code gen)     : %ld\n", mono_jit_stats.cas_demand_generation);
                }
                if (debug_options.collect_pagefault_stats) {
                        g_print ("Metadata pagefaults   : %d\n", mono_raw_buffer_get_n_pagefaults ());
                        g_print ("AOT pagefaults        : %d\n", mono_aot_get_n_pagefaults ());
                }
        }
}

void
mini_cleanup (MonoDomain *domain)
{
#ifdef HAVE_LINUX_RTC_H
        if (rtc_fd >= 0)
                enable_rtc_timer (FALSE);
#endif

        /* 
         * mono_runtime_cleanup() and mono_domain_finalize () need to
         * be called early since they need the execution engine still
         * fully working (mono_domain_finalize may invoke managed finalizers
         * and mono_runtime_cleanup will wait for other threads to finish).
         */
        mono_domain_finalize (domain, 2000);

        /* This accesses metadata so needs to be called before runtime shutdown */
        print_jit_stats ();

        mono_runtime_cleanup (domain);

        mono_profiler_shutdown ();

        mono_debug_cleanup ();

        mono_icall_cleanup ();

        mono_runtime_cleanup_handlers ();

        mono_domain_free (domain, TRUE);

        mono_code_manager_destroy (global_codeman);
        g_hash_table_destroy (jit_icall_name_hash);
        if (class_init_hash_addr)
                g_hash_table_destroy (class_init_hash_addr);
        g_free (emul_opcode_map);

        mono_cleanup ();

        mono_trace_cleanup ();

        mono_counters_dump (-1, stdout);

        TlsFree(mono_jit_tls_id);

        DeleteCriticalSection (&jit_mutex);

        DeleteCriticalSection (&mono_delegate_section);
}

void
mono_set_defaults (int verbose_level, guint32 opts)
{
        mini_verbose = verbose_level;
        default_opt = opts;
        default_opt_set = TRUE;
}

static void
mono_precompile_assembly (MonoAssembly *ass, void *user_data)
{
        GHashTable *assemblies = (GHashTable*)user_data;
        MonoImage *image = mono_assembly_get_image (ass);
        MonoMethod *method, *invoke;
        int i, count = 0;

        if (g_hash_table_lookup (assemblies, ass))
                return;

        g_hash_table_insert (assemblies, ass, ass);

        if (mini_verbose > 0)
                printf ("PRECOMPILE: %s.\n", mono_image_get_filename (image));

        for (i = 0; i < mono_image_get_table_rows (image, MONO_TABLE_METHOD); ++i) {
                method = mono_get_method (image, MONO_TOKEN_METHOD_DEF | (i + 1), NULL);
                if (method->flags & METHOD_ATTRIBUTE_ABSTRACT)
                        continue;

                count++;
                if (mini_verbose > 1) {
                        char * desc = mono_method_full_name (method, TRUE);
                        g_print ("Compiling %d %s\n", count, desc);
                        g_free (desc);
                }
                mono_compile_method (method);
                if (strcmp (method->name, "Finalize") == 0) {
                        invoke = mono_marshal_get_runtime_invoke (method);
                        mono_compile_method (invoke);
                }
                if (method->klass->marshalbyref && mono_method_signature (method)->hasthis) {
                        invoke = mono_marshal_get_remoting_invoke_with_check (method);
                        mono_compile_method (invoke);
                }
        }

        /* Load and precompile referenced assemblies as well */
        for (i = 0; i < mono_image_get_table_rows (image, MONO_TABLE_ASSEMBLYREF); ++i) {
                mono_assembly_load_reference (image, i);
                if (image->references [i])
                        mono_precompile_assembly (image->references [i], assemblies);
        }
}

void mono_precompile_assemblies ()
{
        GHashTable *assemblies = g_hash_table_new (NULL, NULL);

        mono_assembly_foreach ((GFunc)mono_precompile_assembly, assemblies);

        g_hash_table_destroy (assemblies);
}