Merge branch 'master' of github.com:mono/mono
[mono.git] / mono / mini / method-to-ir.c
index 60508a31e7011ff87e9547d73ed79a88623175b5..e46bb852cd014837fe473a984438e1f2c61d6a9f 100644 (file)
@@ -61,7 +61,7 @@
 #include "jit.h"
 #include "debugger-agent.h"
 
-#define BRANCH_COST 100
+#define BRANCH_COST 10
 #define INLINE_LENGTH_LIMIT 20
 #define INLINE_FAILURE do {\
                if ((cfg->method != method) && (method->wrapper_type == MONO_WRAPPER_NONE))\
@@ -2084,8 +2084,37 @@ callvirt_to_call_membase (int opcode)
 static void
 emit_imt_argument (MonoCompile *cfg, MonoCallInst *call, MonoInst *imt_arg)
 {
+       int method_reg;
+
+       if (COMPILE_LLVM (cfg)) {
+               method_reg = alloc_preg (cfg);
+
+               if (imt_arg) {
+                       MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, method_reg, imt_arg->dreg);
+               } else if (cfg->compile_aot) {
+                       MONO_EMIT_NEW_AOTCONST (cfg, method_reg, call->method, MONO_PATCH_INFO_METHODCONST);
+               } else {
+                       MonoInst *ins;
+                       MONO_INST_NEW (cfg, ins, OP_PCONST);
+                       ins->inst_p0 = call->method;
+                       ins->dreg = method_reg;
+                       MONO_ADD_INS (cfg->cbb, ins);
+               }
+
+#ifdef ENABLE_LLVM
+               call->imt_arg_reg = method_reg;
+#endif
 #ifdef MONO_ARCH_IMT_REG
-       int method_reg = alloc_preg (cfg);
+       mono_call_inst_add_outarg_reg (cfg, call, method_reg, MONO_ARCH_IMT_REG, FALSE);
+#else
+       /* Need this to keep the IMT arg alive */
+       mono_call_inst_add_outarg_reg (cfg, call, method_reg, 0, FALSE);
+#endif
+               return;
+       }
+
+#ifdef MONO_ARCH_IMT_REG
+       method_reg = alloc_preg (cfg);
 
        if (imt_arg) {
                MONO_EMIT_NEW_UNALU (cfg, OP_MOVE, method_reg, imt_arg->dreg);
@@ -2099,10 +2128,6 @@ emit_imt_argument (MonoCompile *cfg, MonoCallInst *call, MonoInst *imt_arg)
                MONO_ADD_INS (cfg->cbb, ins);
        }
 
-#ifdef ENABLE_LLVM
-       if (COMPILE_LLVM (cfg))
-               call->imt_arg_reg = method_reg;
-#endif
        mono_call_inst_add_outarg_reg (cfg, call, method_reg, MONO_ARCH_IMT_REG, FALSE);
 #else
        mono_arch_emit_imt_argument (cfg, call, imt_arg);
@@ -2541,8 +2566,6 @@ get_memcpy_method (void)
        return memcpy_method;
 }
 
-#if HAVE_WRITE_BARRIERS
-
 static void
 create_write_barrier_bitmap (MonoClass *klass, unsigned *wb_bitmap, int offset)
 {
@@ -2567,6 +2590,71 @@ create_write_barrier_bitmap (MonoClass *klass, unsigned *wb_bitmap, int offset)
        }
 }
 
+static void
+emit_write_barrier (MonoCompile *cfg, MonoInst *ptr, MonoInst *value, int value_reg)
+{
+#ifdef HAVE_SGEN_GC
+       int card_table_shift_bits;
+       gpointer card_table_mask;
+       guint8 *card_table = mono_gc_get_card_table (&card_table_shift_bits, &card_table_mask);
+       MonoInst *dummy_use;
+
+#ifdef MONO_ARCH_HAVE_CARD_TABLE_WBARRIER
+       int nursery_shift_bits;
+       size_t nursery_size;
+
+       mono_gc_get_nursery (&nursery_shift_bits, &nursery_size);
+
+       if (!cfg->compile_aot && card_table && nursery_shift_bits > 0) {
+               MonoInst *wbarrier;
+
+               MONO_INST_NEW (cfg, wbarrier, OP_CARD_TABLE_WBARRIER);
+               wbarrier->sreg1 = ptr->dreg;
+               if (value)
+                       wbarrier->sreg2 = value->dreg;
+               else
+                       wbarrier->sreg2 = value_reg;
+               MONO_ADD_INS (cfg->cbb, wbarrier);
+       } else
+#endif
+       if (card_table) {
+               int offset_reg = alloc_preg (cfg);
+               int card_reg  = alloc_preg (cfg);
+               MonoInst *ins;
+
+               MONO_EMIT_NEW_BIALU_IMM (cfg, OP_SHR_UN_IMM, offset_reg, ptr->dreg, card_table_shift_bits);
+               if (card_table_mask)
+                       MONO_EMIT_NEW_BIALU_IMM (cfg, OP_PAND_IMM, offset_reg, offset_reg, card_table_mask);
+
+               /*We can't use PADD_IMM since the cardtable might end up in high addresses and amd64 doesn't support
+                * IMM's larger than 32bits.
+                */
+               if (cfg->compile_aot) {
+                       MONO_EMIT_NEW_AOTCONST (cfg, card_reg, NULL, MONO_PATCH_INFO_GC_CARD_TABLE_ADDR);
+               } else {
+                       MONO_INST_NEW (cfg, ins, OP_PCONST);
+                       ins->inst_p0 = card_table;
+                       ins->dreg = card_reg;
+                       MONO_ADD_INS (cfg->cbb, ins);
+               }
+
+               MONO_EMIT_NEW_BIALU (cfg, OP_PADD, offset_reg, offset_reg, card_reg);
+               MONO_EMIT_NEW_STORE_MEMBASE_IMM (cfg, OP_STOREI1_MEMBASE_IMM, offset_reg, 0, 1);
+       } else {
+               MonoMethod *write_barrier = mono_gc_get_write_barrier ();
+               mono_emit_method_call (cfg, write_barrier, &ptr, NULL);
+       }
+
+       if (value) {
+               EMIT_NEW_DUMMY_USE (cfg, dummy_use, value);
+       } else {
+               MONO_INST_NEW (cfg, dummy_use, OP_DUMMY_USE);
+               dummy_use->sreg1 = value_reg;
+               MONO_ADD_INS (cfg->cbb, dummy_use);
+       }
+#endif
+}
+
 static gboolean
 mono_emit_wb_aware_memcpy (MonoCompile *cfg, MonoClass *klass, MonoInst *iargs[4], int size, int align)
 {
@@ -2588,10 +2676,6 @@ mono_emit_wb_aware_memcpy (MonoCompile *cfg, MonoClass *klass, MonoInst *iargs[4
 
        /* We don't unroll more than 5 stores to avoid code bloat. */
        if (size > 5 * SIZEOF_VOID_P) {
-               /*FIXME this is a temporary fix while issues with valuetypes are solved.*/
-#if SIZEOF_VOID_P == 8
-               return FALSE;
-#endif
                /*This is harmless and simplify mono_gc_wbarrier_value_copy_bitmap */
                size += (SIZEOF_VOID_P - 1);
                size &= ~(SIZEOF_VOID_P - 1);
@@ -2616,17 +2700,8 @@ mono_emit_wb_aware_memcpy (MonoCompile *cfg, MonoClass *klass, MonoInst *iargs[4
                MONO_EMIT_NEW_LOAD_MEMBASE_OP (cfg, OP_LOAD_MEMBASE, tmp_reg, srcreg, offset);
                MONO_EMIT_NEW_STORE_MEMBASE (cfg, OP_STOREP_MEMBASE_REG, dest_ptr_reg, 0, tmp_reg);
 
-               if (need_wb & 0x1) {
-                       MonoInst *dummy_use;
-
-                       MonoMethod *write_barrier = mono_gc_get_write_barrier ();
-                       mono_emit_method_call (cfg, write_barrier, &iargs [0], NULL);
-
-                       MONO_INST_NEW (cfg, dummy_use, OP_DUMMY_USE);
-                       dummy_use->sreg1 = dest_ptr_reg;
-                       MONO_ADD_INS (cfg->cbb, dummy_use);
-               }
-
+               if (need_wb & 0x1)
+                       emit_write_barrier (cfg, iargs [0], NULL, tmp_reg);
 
                offset += SIZEOF_VOID_P;
                size -= SIZEOF_VOID_P;
@@ -2663,7 +2738,6 @@ mono_emit_wb_aware_memcpy (MonoCompile *cfg, MonoClass *klass, MonoInst *iargs[4
 
        return TRUE;
 }
-#endif
 
 /*
  * Emit code to copy a valuetype of type @klass whose address is stored in
@@ -2688,9 +2762,8 @@ mini_emit_stobj (MonoCompile *cfg, MonoInst *dest, MonoInst *src, MonoClass *kla
        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 (klass->has_references && !native) {
+       if (cfg->gen_write_barriers && klass->has_references && !native) {
                /* Avoid barriers when storing to the stack */
                if (!((dest->opcode == OP_ADD_IMM && dest->sreg1 == cfg->frame_reg) ||
                          (dest->opcode == OP_LDADDR))) {
@@ -2720,7 +2793,6 @@ mini_emit_stobj (MonoCompile *cfg, MonoInst *dest, MonoInst *src, MonoClass *kla
                        return;
                }
        }
-#endif
 
        if ((cfg->opt & MONO_OPT_INTRINS) && n <= sizeof (gpointer) * 5) {
                /* FIXME: Optimize the case when src/dest is OP_LDADDR */
@@ -2942,7 +3014,7 @@ mini_emit_check_array_type (MonoCompile *cfg, MonoInst *obj, MonoClass *array_cl
        if (cfg->generic_sharing_context)
                context_used = mono_class_check_context_used (array_class);
 
-       MONO_EMIT_NEW_LOAD_MEMBASE (cfg, vtable_reg, obj->dreg, G_STRUCT_OFFSET (MonoObject, vtable));
+       MONO_EMIT_NEW_LOAD_MEMBASE_FAULT (cfg, vtable_reg, obj->dreg, G_STRUCT_OFFSET (MonoObject, vtable));
                                       
        if (cfg->opt & MONO_OPT_SHARED) {
                int class_reg = alloc_preg (cfg);
@@ -4109,6 +4181,7 @@ mini_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSign
                        /* Decompose later to allow more optimizations */
                        EMIT_NEW_UNALU (cfg, ins, OP_STRLEN, dreg, args [0]->dreg);
                        ins->type = STACK_I4;
+                       ins->flags |= MONO_INST_FAULT;
                        cfg->cbb->has_array_access = TRUE;
                        cfg->flags |= MONO_CFG_HAS_ARRAY_ACCESS;
 
@@ -4134,8 +4207,8 @@ mini_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSign
                        type_from_op (ins, NULL, NULL);
 
                        return ins;
-#if !defined(MONO_ARCH_EMULATE_MUL_DIV) && !defined(HAVE_MOVING_COLLECTOR)
-               } else if (strcmp (cmethod->name, "InternalGetHashCode") == 0) {
+#if !defined(MONO_ARCH_EMULATE_MUL_DIV)
+               } else if (strcmp (cmethod->name, "InternalGetHashCode") == 0 && !mono_gc_is_moving ()) {
                        int dreg = alloc_ireg (cfg);
                        int t1 = alloc_ireg (cfg);
        
@@ -4154,6 +4227,49 @@ mini_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSign
        } else if (cmethod->klass == mono_defaults.array_class) {
                if (strcmp (cmethod->name + 1, "etGenericValueImpl") == 0)
                        return emit_array_generic_access (cfg, fsig, args, *cmethod->name == 'S');
+
+#ifndef MONO_BIG_ARRAYS
+               /*
+                * This is an inline version of GetLength/GetLowerBound(0) used frequently in
+                * Array methods.
+                */
+               if ((strcmp (cmethod->name, "GetLength") == 0 || strcmp (cmethod->name, "GetLowerBound") == 0) && args [1]->opcode == OP_ICONST && args [1]->inst_c0 == 0) {
+                       int dreg = alloc_ireg (cfg);
+                       int bounds_reg = alloc_ireg (cfg);
+                       MonoBasicBlock *end_bb, *szarray_bb;
+                       gboolean get_length = strcmp (cmethod->name, "GetLength") == 0;
+
+                       NEW_BBLOCK (cfg, end_bb);
+                       NEW_BBLOCK (cfg, szarray_bb);
+
+                       EMIT_NEW_LOAD_MEMBASE_FAULT (cfg, ins, OP_LOAD_MEMBASE, bounds_reg,
+                                                                                args [0]->dreg, G_STRUCT_OFFSET (MonoArray, bounds));
+                       MONO_EMIT_NEW_BIALU_IMM (cfg, OP_COMPARE_IMM, -1, bounds_reg, 0);
+                       MONO_EMIT_NEW_BRANCH_BLOCK (cfg, OP_IBEQ, szarray_bb);
+                       /* Non-szarray case */
+                       if (get_length)
+                               EMIT_NEW_LOAD_MEMBASE (cfg, ins, OP_LOADI4_MEMBASE, dreg,
+                                                                          bounds_reg, G_STRUCT_OFFSET (MonoArrayBounds, length));
+                       else
+                               EMIT_NEW_LOAD_MEMBASE (cfg, ins, OP_LOADI4_MEMBASE, dreg,
+                                                                          bounds_reg, G_STRUCT_OFFSET (MonoArrayBounds, lower_bound));
+                       MONO_EMIT_NEW_BRANCH_BLOCK (cfg, OP_BR, end_bb);
+                       MONO_START_BB (cfg, szarray_bb);
+                       /* Szarray case */
+                       if (get_length)
+                               EMIT_NEW_LOAD_MEMBASE (cfg, ins, OP_LOADI4_MEMBASE, dreg,
+                                                                          args [0]->dreg, G_STRUCT_OFFSET (MonoArray, max_length));
+                       else
+                               MONO_EMIT_NEW_ICONST (cfg, dreg, 0);
+                       MONO_START_BB (cfg, end_bb);
+
+                       EMIT_NEW_UNALU (cfg, ins, OP_MOVE, dreg, dreg);
+                       ins->type = STACK_I4;
+                       
+                       return ins;
+               }
+#endif
+
                if (cmethod->name [0] != 'g')
                        return NULL;
 
@@ -4196,7 +4312,10 @@ mini_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSign
                }
        } else if (cmethod->klass == mono_defaults.monitor_class) {
 #if defined(MONO_ARCH_MONITOR_OBJECT_REG)
-               if (strcmp (cmethod->name, "Enter") == 0) {
+               /* The trampolines don't work under SGEN */
+               gboolean is_moving_gc = mono_gc_is_moving ();
+
+               if (strcmp (cmethod->name, "Enter") == 0 && fsig->param_count == 1 && !is_moving_gc) {
                        MonoCallInst *call;
 
                        if (COMPILE_LLVM (cfg)) {
@@ -4213,7 +4332,7 @@ mini_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSign
                        }
 
                        return (MonoInst*)call;
-               } else if (strcmp (cmethod->name, "Exit") == 0) {
+               } else if (strcmp (cmethod->name, "Exit") == 0 && !is_moving_gc) {
                        MonoCallInst *call;
 
                        if (COMPILE_LLVM (cfg)) {
@@ -4236,7 +4355,7 @@ mini_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSign
                                 strcmp (cfg->method->name, "FastMonitorExit") == 0))
                        return NULL;
 
-               if (strcmp (cmethod->name, "Enter") == 0 ||
+               if ((strcmp (cmethod->name, "Enter") == 0 && fsig->param_count == 1) ||
                                strcmp (cmethod->name, "Exit") == 0)
                        fast_method = mono_monitor_get_fast_path (cmethod);
                if (!fast_method)
@@ -4371,14 +4490,8 @@ mini_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSign
                                g_assert_not_reached ();
                        }
 
-#if HAVE_WRITE_BARRIERS
-                       if (is_ref) {
-                               MonoInst *dummy_use;
-                               MonoMethod *write_barrier = mono_gc_get_write_barrier ();
-                               mono_emit_method_call (cfg, write_barrier, &args [0], NULL);
-                               EMIT_NEW_DUMMY_USE (cfg, dummy_use, args [1]);
-                       }
-#endif
+                       if (cfg->gen_write_barriers && is_ref)
+                               emit_write_barrier (cfg, args [0], args [1], -1);
                }
 #endif /* MONO_ARCH_HAVE_ATOMIC_EXCHANGE */
  
@@ -4411,14 +4524,8 @@ mini_emit_inst_for_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSign
                        } else {
                                /* g_assert_not_reached (); */
                        }
-#if HAVE_WRITE_BARRIERS
-                       if (is_ref) {
-                               MonoInst *dummy_use;
-                               MonoMethod *write_barrier = mono_gc_get_write_barrier ();
-                               mono_emit_method_call (cfg, write_barrier, &args [0], NULL);
-                               EMIT_NEW_DUMMY_USE (cfg, dummy_use, args [1]);
-                       }
-#endif
+                       if (cfg->gen_write_barriers && is_ref)
+                               emit_write_barrier (cfg, args [0], args [1], -1);
                }
 #endif /* MONO_ARCH_HAVE_ATOMIC_CAS */
 
@@ -4472,7 +4579,7 @@ mini_redirect_call (MonoCompile *cfg, MonoMethod *method,
 {
        if (method->klass == mono_defaults.string_class) {
                /* managed string allocation support */
-               if (strcmp (method->name, "InternalAllocateStr") == 0 && !(mono_profiler_events & MONO_PROFILE_ALLOCATIONS)) {
+               if (strcmp (method->name, "InternalAllocateStr") == 0 && !(mono_profiler_events & MONO_PROFILE_ALLOCATIONS) && !(cfg->opt & MONO_OPT_SHARED)) {
                        MonoInst *iargs [2];
                        MonoVTable *vtable = mono_class_vtable (cfg->domain, method->klass);
                        MonoMethod *managed_alloc = NULL;
@@ -4630,6 +4737,12 @@ inline_method (MonoCompile *cfg, MonoMethod *cmethod, MonoMethodSignature *fsig,
                return 0;
        }
 
+       /*Must verify before creating locals as it can cause the JIT to assert.*/
+       if (mono_compile_is_broken (cfg, cmethod, FALSE)) {
+               mono_metadata_free_mh (cheader);
+               return 0;
+       }
+
        /* allocate space to store the return value */
        if (!MONO_TYPE_IS_VOID (fsig->ret)) {
                rvar = mono_compile_create_var (cfg, fsig->ret, OP_LOCAL);
@@ -5330,9 +5443,6 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                dont_verify_stloc = TRUE;
        }
 
-       if (!dont_verify && mini_method_verify (cfg, method_definition))
-               goto exception_exit;
-
        if (mono_debug_using_mono_debugger ())
                cfg->keep_cil_nops = TRUE;
 
@@ -5390,6 +5500,7 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                cfg->bb_exit = end_bblock;
                end_bblock->cil_code = NULL;
                end_bblock->cil_length = 0;
+               end_bblock->flags |= BB_INDIRECT_JUMP_TARGET;
                g_assert (cfg->num_bblocks == 2);
 
                arg_array = cfg->args;
@@ -6074,7 +6185,7 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                        /* FIXME: check the signature matches */
                        cmethod = mini_get_method (cfg, method, token, NULL, generic_context);
 
-                       if (!cmethod)
+                       if (!cmethod || mono_loader_get_last_error ())
                                goto load_error;
  
                        if (cfg->generic_sharing_context && mono_method_check_context_used (cmethod))
@@ -6188,7 +6299,7 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                                        cil_method = cmethod;
                                }
 
-                               if (!cmethod)
+                               if (!cmethod || mono_loader_get_last_error ())
                                        goto load_error;
                                if (!dont_verify && !cfg->skip_visibility) {
                                        MonoMethod *target_method = cil_method;
@@ -6398,8 +6509,10 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
 
                                vtable_arg = emit_get_rgctx_method (cfg, context_used, cmethod, MONO_RGCTX_INFO_METHOD_RGCTX);
 
-                               if (!(cmethod->flags & METHOD_ATTRIBUTE_VIRTUAL) ||
-                                               MONO_METHOD_IS_FINAL (cmethod)) {
+                               /* !marshalbyref is needed to properly handle generic methods + remoting */
+                               if ((!(cmethod->flags & METHOD_ATTRIBUTE_VIRTUAL) ||
+                                        MONO_METHOD_IS_FINAL (cmethod)) &&
+                                       !cmethod->klass->marshalbyref) {
                                        if (virtual)
                                                check_this = TRUE;
                                        virtual = 0;
@@ -6523,6 +6636,7 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
 
                        /* Conversion to a JIT intrinsic */
                        if (cmethod && (cfg->opt & MONO_OPT_INTRINS) && (ins = mini_emit_inst_for_method (cfg, cmethod, fsig, sp))) {
+                               bblock = cfg->cbb;
                                if (!MONO_TYPE_IS_VOID (fsig->ret)) {
                                        type_to_eval_stack_type ((cfg), fsig->ret, ins);
                                        *sp = ins;
@@ -6994,11 +7108,13 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                        target = ip + n * sizeof (guint32);
 
                        GET_BBLOCK (cfg, default_bblock, target);
+                       default_bblock->flags |= BB_INDIRECT_JUMP_TARGET;
 
                        targets = mono_mempool_alloc (cfg->mempool, sizeof (MonoBasicBlock*) * n);
                        for (i = 0; i < n; ++i) {
                                GET_BBLOCK (cfg, tblock, target + (gint32)read32(ip));
                                targets [i] = tblock;
+                               targets [i]->flags |= BB_INDIRECT_JUMP_TARGET;
                                ip += 4;
                        }
 
@@ -7127,15 +7243,8 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                        ins_flag = 0;
                        MONO_ADD_INS (bblock, ins);
 
-#if HAVE_WRITE_BARRIERS
-                       if (*ip == CEE_STIND_REF && method->wrapper_type != MONO_WRAPPER_WRITE_BARRIER && !((sp [1]->opcode == OP_PCONST) && (sp [1]->inst_p0 == 0))) {
-                               MonoInst *dummy_use;
-                               /* insert call to write barrier */
-                               MonoMethod *write_barrier = mono_gc_get_write_barrier ();
-                               mono_emit_method_call (cfg, write_barrier, sp, NULL);
-                               EMIT_NEW_DUMMY_USE (cfg, dummy_use, sp [1]);
-                       }
-#endif
+                       if (cfg->gen_write_barriers && *ip == CEE_STIND_REF && method->wrapper_type != MONO_WRAPPER_WRITE_BARRIER && !((sp [1]->opcode == OP_PCONST) && (sp [1]->inst_p0 == 0)))
+                               emit_write_barrier (cfg, sp [0], sp [1], -1);
 
                        inline_costs += 1;
                        ++ip;
@@ -7338,14 +7447,8 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                                store->flags |= ins_flag;
                                MONO_ADD_INS (cfg->cbb, store);
 
-#if HAVE_WRITE_BARRIERS
-                               if (cfg->method->wrapper_type != MONO_WRAPPER_WRITE_BARRIER) {
-                                       MonoInst *dummy_use;
-                                       MonoMethod *write_barrier = mono_gc_get_write_barrier ();
-                                       mono_emit_method_call (cfg, write_barrier, sp, NULL);
-                                       EMIT_NEW_DUMMY_USE (cfg, dummy_use, sp [1]);
-                               }
-#endif
+                               if (cfg->gen_write_barriers && cfg->method->wrapper_type != MONO_WRAPPER_WRITE_BARRIER)
+                                       emit_write_barrier (cfg, sp [0], sp [1], -1);
                        } else {
                                mini_emit_stobj (cfg, sp [0], sp [1], klass, FALSE);
                        }
@@ -7486,7 +7589,7 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                        CHECK_OPSIZE (5);
                        token = read32 (ip + 1);
                        cmethod = mini_get_method (cfg, method, token, NULL, generic_context);
-                       if (!cmethod)
+                       if (!cmethod || mono_loader_get_last_error ())
                                goto load_error;
                        fsig = mono_method_get_signature (cmethod, image, token);
                        if (!fsig)
@@ -7508,6 +7611,11 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                                ensure_method_is_allowed_to_call_method (cfg, method, cmethod, bblock, ip);
                        }
 
+                       if (cfg->generic_sharing_context && cmethod && cmethod->klass != method->klass && cmethod->klass->generic_class && mono_method_is_generic_sharable_impl (cmethod, TRUE) && mono_class_needs_cctor_run (cmethod->klass, method)) {
+                               emit_generic_class_init (cfg, cmethod->klass);
+                               CHECK_TYPELOAD (cmethod->klass);
+                       }
+
                        if (cmethod->klass->valuetype && mono_class_generic_sharing_enabled (cmethod->klass) &&
                                        mono_method_is_generic_sharable_impl (cmethod, TRUE)) {
                                if (cmethod->is_inflated && mono_method_get_context (cmethod)->method_inst) {
@@ -7834,18 +7942,7 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
 
                        if (generic_class_is_reference_type (cfg, klass)) {
                                /* CASTCLASS FIXME kill this huge slice of duplicated code*/
-                               if (context_used) {
-                                       MonoInst *iargs [2];
-
-                                       /* obj */
-                                       iargs [0] = *sp;
-                                       /* klass */
-                                       iargs [1] = emit_get_rgctx_klass (cfg, context_used, klass, MONO_RGCTX_INFO_KLASS);
-                                       ins = mono_emit_jit_icall (cfg, mono_object_castclass, iargs);
-                                       *sp ++ = ins;
-                                       ip += 5;
-                                       inline_costs += 2;
-                               } else if (klass->marshalbyref || klass->flags & TYPE_ATTRIBUTE_INTERFACE) {                            
+                               if (!context_used && (klass->marshalbyref || klass->flags & TYPE_ATTRIBUTE_INTERFACE)) {
                                        MonoMethod *mono_castclass;
                                        MonoInst *iargs [1];
                                        int costs;
@@ -7865,7 +7962,7 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                                        *sp++ = iargs [0];
                                        inline_costs += costs;
                                } else {
-                                       ins = handle_castclass (cfg, klass, *sp, 0);
+                                       ins = handle_castclass (cfg, klass, *sp, context_used);
                                        CHECK_CFG_EXCEPTION;
                                        bblock = cfg->cbb;
                                        *sp ++ = ins;
@@ -7921,40 +8018,75 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                        if (target_type_is_incompatible (cfg, &klass->byval_arg, *sp))
                                UNVERIFIED;
                        /* frequent check in generic code: box (struct), brtrue */
+
+                       // FIXME: LLVM can't handle the inconsistent bb linking
                        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)) {
-                               /*printf ("box-brtrue opt at 0x%04x in %s\n", real_offset, method->name);*/
+                               ip + 5 < end && ip_in_bb (cfg, bblock, ip + 5) &&
+                               (ip [5] == CEE_BRTRUE || 
+                                ip [5] == CEE_BRTRUE_S ||
+                                ip [5] == CEE_BRFALSE ||
+                                ip [5] == CEE_BRFALSE_S)) {
+                               gboolean is_true = ip [5] == CEE_BRTRUE || ip [5] == CEE_BRTRUE_S;
+                               int dreg;
+                               MonoBasicBlock *true_bb, *false_bb;
+
                                ip += 5;
-                               MONO_INST_NEW (cfg, ins, OP_BR);
-                               if (*ip == CEE_BRTRUE_S) {
+
+                               if (cfg->verbose_level > 3) {
+                                       printf ("converting (in B%d: stack: %d) %s", bblock->block_num, (int)(sp - stack_start), mono_disasm_code_one (NULL, method, ip, NULL));
+                                       printf ("<box+brtrue opt>\n");
+                               }
+
+                               switch (*ip) {
+                               case CEE_BRTRUE_S:
+                               case CEE_BRFALSE_S:
                                        CHECK_OPSIZE (2);
                                        ip++;
                                        target = ip + 1 + (signed char)(*ip);
                                        ip++;
-                               } else {
+                                       break;
+                               case CEE_BRTRUE:
+                               case CEE_BRFALSE:
                                        CHECK_OPSIZE (5);
                                        ip++;
                                        target = ip + 4 + (gint)(read32 (ip));
                                        ip += 4;
+                                       break;
+                               default:
+                                       g_assert_not_reached ();
                                }
-                               GET_BBLOCK (cfg, tblock, target);
-                               link_bblock (cfg, bblock, tblock);
-                               ins->inst_target_bb = tblock;
-                               GET_BBLOCK (cfg, tblock, ip);
+
                                /* 
-                                * This leads to some inconsistency, since the two bblocks are 
-                                * not really connected, but it is needed for handling stack 
+                                * We need to link both bblocks, since it is needed for handling stack
                                 * arguments correctly (See test_0_box_brtrue_opt_regress_81102).
-                                * FIXME: This should only be needed if sp != stack_start, but that
-                                * doesn't work for some reason (test failure in mcs/tests on x86).
+                                * Branching to only one of them would lead to inconsistencies, so
+                                * generate an ICONST+BRTRUE, the branch opts will get rid of them.
                                 */
-                               link_bblock (cfg, bblock, tblock);
+                               GET_BBLOCK (cfg, true_bb, target);
+                               GET_BBLOCK (cfg, false_bb, ip);
+
+                               mono_link_bblock (cfg, cfg->cbb, true_bb);
+                               mono_link_bblock (cfg, cfg->cbb, false_bb);
+
                                if (sp != stack_start) {
                                        handle_stack_args (cfg, stack_start, sp - stack_start);
                                        sp = stack_start;
                                        CHECK_UNVERIFIABLE (cfg);
                                }
-                               MONO_ADD_INS (bblock, ins);
+
+                               if (COMPILE_LLVM (cfg)) {
+                                       dreg = alloc_ireg (cfg);
+                                       MONO_EMIT_NEW_ICONST (cfg, dreg, 0);
+                                       MONO_EMIT_NEW_BIALU_IMM (cfg, OP_COMPARE_IMM, -1, dreg, is_true ? 0 : 1);
+
+                                       MONO_EMIT_NEW_BRANCH_BLOCK2 (cfg, OP_IBEQ, true_bb, false_bb);
+                               } else {
+                                       /* The JIT can't eliminate the iconst+compare */
+                                       MONO_INST_NEW (cfg, ins, OP_BR);
+                                       ins->inst_target_bb = is_true ? true_bb : false_bb;
+                                       MONO_ADD_INS (cfg->cbb, ins);
+                               }
+
                                start_new_bblock = 1;
                                break;
                        }
@@ -8069,21 +8201,15 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                                        if (sp [0]->opcode != OP_LDADDR)
                                                store->flags |= MONO_INST_FAULT;
 
-#if HAVE_WRITE_BARRIERS
-                               if (mini_type_to_stind (cfg, field->type) == CEE_STIND_REF && !(sp [1]->opcode == OP_PCONST && sp [1]->inst_c0 == 0)) {
+                               if (cfg->gen_write_barriers && mini_type_to_stind (cfg, field->type) == CEE_STIND_REF && !(sp [1]->opcode == OP_PCONST && sp [1]->inst_c0 == 0)) {
                                        /* insert call to write barrier */
-                                       MonoMethod *write_barrier = mono_gc_get_write_barrier ();
-                                       MonoInst *iargs [2], *dummy_use;
+                                       MonoInst *ptr;
                                        int dreg;
 
                                        dreg = alloc_preg (cfg);
-                                       EMIT_NEW_BIALU_IMM (cfg, iargs [0], OP_PADD_IMM, dreg, sp [0]->dreg, foffset);
-                                       iargs [1] = sp [1];
-                                       mono_emit_method_call (cfg, write_barrier, iargs, NULL);
-
-                                       EMIT_NEW_DUMMY_USE (cfg, dummy_use, sp [1]);
+                                       EMIT_NEW_BIALU_IMM (cfg, ptr, OP_PADD_IMM, dreg, sp [0]->dreg, foffset);
+                                       emit_write_barrier (cfg, ptr, sp [1], -1);
                                }
-#endif
 
                                        store->flags |= ins_flag;
                                }
@@ -8131,9 +8257,12 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                                        sp [0] = ins;
                                }
 
-                               MONO_EMIT_NULL_CHECK (cfg, sp [0]->dreg);
-
                                if (*ip == CEE_LDFLDA) {
+                                       if (sp [0]->type == STACK_OBJ) {
+                                               MONO_EMIT_NEW_BIALU_IMM (cfg, OP_COMPARE_IMM, -1, sp [0]->dreg, 0);
+                                               MONO_EMIT_NEW_COND_EXC (cfg, EQ, "NullReferenceException");
+                                       }
+
                                        dreg = alloc_preg (cfg);
 
                                        EMIT_NEW_BIALU_IMM (cfg, ins, OP_PADD_IMM, dreg, sp [0]->dreg, foffset);
@@ -8143,6 +8272,8 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                                } else {
                                        MonoInst *load;
 
+                                       MONO_EMIT_NULL_CHECK (cfg, sp [0]->dreg);
+
                                        EMIT_NEW_LOAD_MEMBASE_TYPE (cfg, load, field->type, sp [0]->dreg, foffset);
                                        load->flags |= ins_flag;
                                        if (sp [0]->opcode != OP_LDADDR)
@@ -8403,16 +8534,22 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                                        case MONO_TYPE_U:
                                        case MONO_TYPE_PTR:
                                        case MONO_TYPE_FNPTR:
-#ifndef HAVE_MOVING_COLLECTOR
+                                               EMIT_NEW_PCONST (cfg, *sp, *((gpointer *)addr));
+                                               type_to_eval_stack_type ((cfg), field->type, *sp);
+                                               sp++;
+                                               break;
                                        case MONO_TYPE_STRING:
                                        case MONO_TYPE_OBJECT:
                                        case MONO_TYPE_CLASS:
                                        case MONO_TYPE_SZARRAY:
                                        case MONO_TYPE_ARRAY:
-#endif
-                                               EMIT_NEW_PCONST (cfg, *sp, *((gpointer *)addr));
-                                               type_to_eval_stack_type ((cfg), field->type, *sp);
-                                               sp++;
+                                               if (!mono_gc_is_moving ()) {
+                                                       EMIT_NEW_PCONST (cfg, *sp, *((gpointer *)addr));
+                                                       type_to_eval_stack_type ((cfg), field->type, *sp);
+                                                       sp++;
+                                               } else {
+                                                       is_const = FALSE;
+                                               }
                                                break;
                                        case MONO_TYPE_I8:
                                        case MONO_TYPE_U8:
@@ -8452,16 +8589,11 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                        CHECK_TYPELOAD (klass);
                        /* FIXME: should check item at sp [1] is compatible with the type of the store. */
                        EMIT_NEW_STORE_MEMBASE_TYPE (cfg, ins, &klass->byval_arg, sp [0]->dreg, 0, sp [1]->dreg);
-#if HAVE_WRITE_BARRIERS
-                       if (cfg->method->wrapper_type != MONO_WRAPPER_WRITE_BARRIER &&
+                       if (cfg->gen_write_barriers && cfg->method->wrapper_type != MONO_WRAPPER_WRITE_BARRIER &&
                                        generic_class_is_reference_type (cfg, klass)) {
-                               MonoInst *dummy_use;
                                /* insert call to write barrier */
-                               MonoMethod *write_barrier = mono_gc_get_write_barrier ();
-                               mono_emit_method_call (cfg, write_barrier, sp, NULL);
-                               EMIT_NEW_DUMMY_USE (cfg, dummy_use, sp [1]);
+                               emit_write_barrier (cfg, sp [0], sp [1], -1);
                        }
-#endif
                        ins_flag = 0;
                        ip += 5;
                        inline_costs += 1;
@@ -8597,6 +8729,8 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                        ins->dreg = alloc_preg (cfg);
                        ins->sreg1 = sp [0]->dreg;
                        ins->type = STACK_I4;
+                       /* This flag will be inherited by the decomposition */
+                       ins->flags |= MONO_INST_FAULT;
                        MONO_ADD_INS (cfg->cbb, ins);
                        cfg->flags |= MONO_CFG_HAS_ARRAY_ACCESS;
                        cfg->cbb->has_array_access = TRUE;
@@ -9481,7 +9615,7 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                                CHECK_OPSIZE (6);
                                n = read32 (ip + 2);
                                cmethod = mini_get_method (cfg, method, n, NULL, generic_context);
-                               if (!cmethod)
+                               if (!cmethod || mono_loader_get_last_error ())
                                        goto load_error;
                                mono_class_init (cmethod->klass);
 
@@ -9520,9 +9654,9 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                                                if (cfg->generic_sharing_context)
                                                        invoke_context_used = mono_method_check_context_used (invoke);
 
-#if defined(MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE) && !defined(HAVE_WRITE_BARRIERS)
+#if defined(MONO_ARCH_HAVE_CREATE_DELEGATE_TRAMPOLINE)
                                                /* FIXME: SGEN support */
-                                               if (invoke_context_used == 0) {
+                                               if (!cfg->gen_write_barriers && invoke_context_used == 0) {
                                                        MonoInst *target_ins;
 
                                                        ip += 6;
@@ -9555,7 +9689,7 @@ mono_method_to_ir (MonoCompile *cfg, MonoMethod *method, MonoBasicBlock *start_b
                                CHECK_OPSIZE (6);
                                n = read32 (ip + 2);
                                cmethod = mini_get_method (cfg, method, n, NULL, generic_context);
-                               if (!cmethod)
+                               if (!cmethod || mono_loader_get_last_error ())
                                        goto load_error;
                                mono_class_init (cmethod->klass);
  
@@ -10425,46 +10559,37 @@ op_to_op_src2_membase (int load_opcode, int opcode)
 #endif
 
 #ifdef TARGET_AMD64
-       switch (opcode) {
-       case OP_ICOMPARE:
-               if ((load_opcode == OP_LOADI4_MEMBASE) || (load_opcode == OP_LOADU4_MEMBASE))
+       if ((load_opcode == OP_LOADI4_MEMBASE) || (load_opcode == OP_LOADU4_MEMBASE)) {
+               switch (opcode) {
+               case OP_ICOMPARE:
                        return OP_AMD64_ICOMPARE_REG_MEMBASE;
-               break;
-       case OP_COMPARE:
-       case OP_LCOMPARE:
-               if ((load_opcode == OP_LOADI8_MEMBASE) || (load_opcode == OP_LOAD_MEMBASE))
-                       return OP_AMD64_COMPARE_REG_MEMBASE;
-               break;
-       case OP_IADD:
-               if ((load_opcode == OP_LOADI4_MEMBASE) || (load_opcode == OP_LOADU4_MEMBASE))
+               case OP_IADD:
                        return OP_X86_ADD_REG_MEMBASE;
-       case OP_ISUB:
-               if ((load_opcode == OP_LOADI4_MEMBASE) || (load_opcode == OP_LOADU4_MEMBASE))
+               case OP_ISUB:
                        return OP_X86_SUB_REG_MEMBASE;
-       case OP_IAND:
-               if ((load_opcode == OP_LOADI4_MEMBASE) || (load_opcode == OP_LOADU4_MEMBASE))
+               case OP_IAND:
                        return OP_X86_AND_REG_MEMBASE;
-       case OP_IOR:
-               if ((load_opcode == OP_LOADI4_MEMBASE) || (load_opcode == OP_LOADU4_MEMBASE))
+               case OP_IOR:
                        return OP_X86_OR_REG_MEMBASE;
-       case OP_IXOR:
-               if ((load_opcode == OP_LOADI4_MEMBASE) || (load_opcode == OP_LOADU4_MEMBASE))
+               case OP_IXOR:
                        return OP_X86_XOR_REG_MEMBASE;
-       case OP_LADD:
-               if ((load_opcode == OP_LOADI8_MEMBASE) || (load_opcode == OP_LOAD_MEMBASE))
+               }
+       } else if ((load_opcode == OP_LOADI8_MEMBASE) || (load_opcode == OP_LOAD_MEMBASE)) {
+               switch (opcode) {
+               case OP_COMPARE:
+               case OP_LCOMPARE:
+                       return OP_AMD64_COMPARE_REG_MEMBASE;
+               case OP_LADD:
                        return OP_AMD64_ADD_REG_MEMBASE;
-       case OP_LSUB:
-               if ((load_opcode == OP_LOADI8_MEMBASE) || (load_opcode == OP_LOAD_MEMBASE))
+               case OP_LSUB:
                        return OP_AMD64_SUB_REG_MEMBASE;
-       case OP_LAND:
-               if ((load_opcode == OP_LOADI8_MEMBASE) || (load_opcode == OP_LOAD_MEMBASE))
+               case OP_LAND:
                        return OP_AMD64_AND_REG_MEMBASE;
-       case OP_LOR:
-               if ((load_opcode == OP_LOADI8_MEMBASE) || (load_opcode == OP_LOAD_MEMBASE))
+               case OP_LOR:
                        return OP_AMD64_OR_REG_MEMBASE;
-       case OP_LXOR:
-               if ((load_opcode == OP_LOADI8_MEMBASE) || (load_opcode == OP_LOAD_MEMBASE))
+               case OP_LXOR:
                        return OP_AMD64_XOR_REG_MEMBASE;
+               }
        }
 #endif