* src/vm/jit/alpha/emit.c [ENABLE_THREADS] (threads/native/lock.h):
[cacao.git] / src / vm / jit / stack.c
index 221d71cb94e105a633745862c6c7265550f74d08..beb5a6c8f78c77646fdccea52c6831e80c9f3053 100644 (file)
@@ -30,7 +30,7 @@
             Christian Thalinger
             Christian Ullrich
 
-   $Id: stack.c 4860 2006-04-28 12:24:40Z twisti $
+   $Id: stack.c 5251 2006-08-18 13:01:00Z twisti $
 
 */
 
 #include "vm/resolve.h"
 #include "vm/statistics.h"
 #include "vm/stringlocal.h"
+#include "vm/jit/cfg.h"
 #include "vm/jit/codegen-common.h"
 #include "vm/jit/abi.h"
+#include "vm/jit/show.h"
 
 #if defined(ENABLE_DISASSEMBLER)
 # include "vm/jit/disass.h"
 # include "vm/jit/allocator/lsra.h"
 #endif
 
+/*#define STACK_VERBOSE*/
 
-/* global variables ***********************************************************/
-
-#if defined(USE_THREADS)
-static java_objectheader *lock_stack_show_icmd;
-#endif
 
 /* macro for saving #ifdefs ***************************************************/
 
 #if defined(ENABLE_INTRP)
+#define IF_INTRP(x) if (opt_intrp) { x }
 #define IF_NO_INTRP(x) if (!opt_intrp) { x }
 #else
+#define IF_INTRP(x)
 #define IF_NO_INTRP(x) { x }
 #endif
 
+#if defined(ENABLE_INTRP)
+#if defined(ENABLE_JIT)
+#define IF_JIT(x) if (!opt_intrp) { x }
+#else
+#define IF_JIT(x)
+#endif
+#else /* !defined(ENABLE_INTRP) */
+#define IF_JIT(x) { x }
+#endif /* defined(ENABLE_INTRP) */
+
+#if defined(ENABLE_STATISTICS)
+#define STATISTICS_STACKDEPTH_DISTRIBUTION(distr)                    \
+       do {                                                             \
+               if (opt_stat) {                                              \
+                       if (stackdepth >= 10)                                    \
+                               count_store_depth[10]++;                             \
+                       else                                                     \
+                               count_store_depth[stackdepth]++;                     \
+               }                                                            \
+       } while (0)
+#else /* !defined(ENABLE_STATISTICS) */
+#define STATISTICS_STACKDEPTH_DISTRIBUTION(distr)
+#endif
+
 /* stack_init ******************************************************************
 
    Initialized the stack analysis subsystem (called by jit_init).
@@ -92,18 +116,6 @@ static java_objectheader *lock_stack_show_icmd;
 
 bool stack_init(void)
 {
-#if defined(USE_THREADS)
-       /* initialize the show lock */
-
-       lock_stack_show_icmd = NEW(java_objectheader);
-
-# if defined(NATIVE_THREADS)
-       initObjectLock(lock_stack_show_icmd);
-# endif
-#endif
-
-       /* everything's ok */
-
        return true;
 }
 
@@ -132,172 +144,454 @@ bool stack_init(void)
 
 *******************************************************************************/
 
-bool stack_analyse(jitdata *jd)
+#define BLOCK_OF(index)                                              \
+    (jd->new_basicblocks + jd->new_basicblockindex[index])
+
+#define CLR_S1                                                       \
+    (iptr->s1.var = NULL)
+
+#define USE_S1_LOCAL(type1)
+
+#define USE_S1(type1)                                                \
+    do {                                                             \
+        REQUIRE_1;                                                   \
+        CHECK_BASIC_TYPE(type1, curstack->type);                     \
+        iptr->s1.var = curstack;                                     \
+    } while (0)
+
+#define USE_S1_ANY                                                   \
+    do {                                                             \
+        REQUIRE_1;                                                   \
+        iptr->s1.var = curstack;                                     \
+    } while (0)
+
+#define USE_S1_S2(type1, type2)                                      \
+    do {                                                             \
+        REQUIRE_2;                                                   \
+        CHECK_BASIC_TYPE(type1, curstack->prev->type);               \
+        CHECK_BASIC_TYPE(type2, curstack->type);                     \
+        iptr->sx.s23.s2.var = curstack;                              \
+        iptr->s1.var = curstack->prev;                               \
+    } while (0)
+
+#define USE_S1_S2_ANY_ANY                                            \
+    do {                                                             \
+        REQUIRE_2;                                                   \
+        iptr->sx.s23.s2.var = curstack;                              \
+        iptr->s1.var = curstack->prev;                               \
+    } while (0)
+
+#define USE_S1_S2_S3(type1, type2, type3)                            \
+    do {                                                             \
+        REQUIRE_3;                                                   \
+        CHECK_BASIC_TYPE(type1, curstack->prev->prev->type);         \
+        CHECK_BASIC_TYPE(type2, curstack->prev->type);               \
+        CHECK_BASIC_TYPE(type3, curstack->type);                     \
+        iptr->sx.s23.s3.var = curstack;                              \
+        iptr->sx.s23.s2.var = curstack->prev;                        \
+        iptr->s1.var = curstack->prev->prev;                         \
+    } while (0)
+
+#define POP_S1(type1)                                                \
+    do {                                                             \
+        USE_S1(type1);                                               \
+        if (curstack->varkind == UNDEFVAR)                           \
+            curstack->varkind = TEMPVAR;                             \
+        curstack = curstack->prev;                                   \
+    } while (0)
+
+#define POP_S1_ANY                                                   \
+    do {                                                             \
+        USE_S1_ANY;                                                  \
+        if (curstack->varkind == UNDEFVAR)                           \
+            curstack->varkind = TEMPVAR;                             \
+        curstack = curstack->prev;                                   \
+    } while (0)
+
+#define POP_S1_S2(type1, type2)                                      \
+    do {                                                             \
+        USE_S1_S2(type1, type2);                                     \
+        if (curstack->varkind == UNDEFVAR)                           \
+            curstack->varkind = TEMPVAR;                             \
+        if (curstack->prev->varkind == UNDEFVAR)                     \
+            curstack->prev->varkind = TEMPVAR;                       \
+        curstack = curstack->prev->prev;                             \
+    } while (0)
+
+#define POP_S1_S2_ANY_ANY                                            \
+    do {                                                             \
+        USE_S1_S2_ANY_ANY;                                           \
+        if (curstack->varkind == UNDEFVAR)                           \
+            curstack->varkind = TEMPVAR;                             \
+        if (curstack->prev->varkind == UNDEFVAR)                     \
+            curstack->prev->varkind = TEMPVAR;                       \
+        curstack = curstack->prev->prev;                             \
+    } while (0)
+
+#define POP_S1_S2_S3(type1, type2, type3)                            \
+    do {                                                             \
+        USE_S1_S2_S3(type1, type2, type3);                           \
+        if (curstack->varkind == UNDEFVAR)                           \
+            curstack->varkind = TEMPVAR;                             \
+        if (curstack->prev->varkind == UNDEFVAR)                     \
+            curstack->prev->varkind = TEMPVAR;                       \
+        if (curstack->prev->prev->varkind == UNDEFVAR)               \
+            curstack->prev->prev->varkind = TEMPVAR;                 \
+        curstack = curstack->prev->prev->prev;                       \
+    } while (0)
+
+#define CLR_SX                                                       \
+    (iptr->sx.val.l = 0)
+
+#define CLR_DST                                                      \
+    (iptr->dst.var = NULL)
+
+#define NEW_DST(typed, depth)                                        \
+    do {                                                             \
+        NEWSTACKn(typed, (depth));                                   \
+        iptr->dst.var = curstack;                                    \
+    } while (0)
+
+#define NEW_DST_LOCALVAR(typed, index)                               \
+    do {                                                             \
+        NEWSTACK(typed, LOCALVAR, (index));                          \
+        iptr->dst.var = curstack;                                    \
+    } while (0)
+
+#define NEW_OP0_0                                                    \
+    do {                                                             \
+        CLR_S1;                                                      \
+        CLR_DST;                                                     \
+    } while (0)
+
+#define NEW_OP0_BRANCH                                               \
+    do {                                                             \
+        CLR_S1;                                                      \
+    } while (0)
+
+#define NEW_OP0_1(typed)                                             \
+    do {                                                             \
+        CLR_S1;                                                      \
+        NEW_DST(typed, stackdepth);                                  \
+        stackdepth++;                                                \
+    } while (0)
+
+#define NEW_OP1_0(type1)                                             \
+    do {                                                             \
+        POP_S1(type1);                                               \
+        CLR_DST;                                                     \
+        stackdepth--;                                                \
+    } while (0)
+
+#define NEW_OP1_0_ANY                                                \
+    do {                                                             \
+        POP_S1_ANY;                                                  \
+        CLR_DST;                                                     \
+        stackdepth--;                                                \
+    } while (0)
+
+#define NEW_OP1_BRANCH(type1)                                        \
+    do {                                                             \
+        POP_S1(type1);                                               \
+        stackdepth--;                                                \
+    } while (0)
+
+#define NEW_OP1_1(type1, typed)                                      \
+    do {                                                             \
+        POP_S1(type1);                                               \
+        NEW_DST(typed, stackdepth - 1);                              \
+    } while (0)
+
+#define NEW_OP2_0(type1, type2)                                      \
+    do {                                                             \
+        POP_S1_S2(type1, type2);                                     \
+        CLR_DST;                                                     \
+        stackdepth -= 2;                                             \
+    } while (0)
+
+#define NEW_OP2_BRANCH(type1, type2)                                 \
+    do {                                                             \
+        POP_S1_S2(type1, type2);                                     \
+        stackdepth -= 2;                                             \
+    } while (0)
+
+#define NEW_OP2_0_ANY_ANY                                            \
+    do {                                                             \
+        POP_S1_S2_ANY_ANY;                                           \
+        CLR_DST;                                                     \
+        stackdepth -= 2;                                             \
+    } while (0)
+
+#define NEW_OP2_1(type1, type2, typed)                               \
+    do {                                                             \
+        POP_S1_S2(type1, type2);                                     \
+        NEW_DST(typed, stackdepth - 2);                              \
+        stackdepth--;                                                \
+    } while (0)
+
+#define NEW_OP3_0(type1, type2, type3)                               \
+    do {                                                             \
+        POP_S1_S2_S3(type1, type2, type3);                           \
+        CLR_DST;                                                     \
+        stackdepth -= 3;                                             \
+    } while (0)
+
+#define NEW_LOAD(type1, index)                                       \
+    do {                                                             \
+        NEW_DST_LOCALVAR(type1, index);                              \
+        stackdepth++;                                                \
+    } while (0)
+
+#define NEW_STORE(type1, index)                                      \
+    do {                                                             \
+        POP_S1(type1);                                               \
+        stackdepth--;                                                \
+    } while (0)
+
+#define BRANCH_TARGET(bt, tempbptr, tempsp)                          \
+    do {                                                             \
+        (bt).block = tempbptr = BLOCK_OF((bt).insindex);             \
+        MARKREACHED(tempbptr, tempsp);                               \
+    } while (0)
+
+#define BRANCH(tempbptr, tempsp)                                     \
+    do {                                                             \
+        iptr->dst.block = tempbptr = BLOCK_OF(iptr->dst.insindex);   \
+        MARKREACHED(tempbptr, tempsp);                               \
+    } while (0)
+
+#define DUP_SLOT(sp)                                                 \
+    do {                                                             \
+        if ((sp)->varkind != TEMPVAR)                                \
+            NEWSTACK((sp)->type, TEMPVAR, stackdepth);               \
+        else                                                         \
+            NEWSTACK((sp)->type, (sp)->varkind, (sp)->varnum);       \
+    } while(0)
+
+bool new_stack_analyse(jitdata *jd)
 {
-       methodinfo   *m;
+       methodinfo   *m;              /* method being analyzed                    */
+       codeinfo     *code;
        codegendata  *cd;
        registerdata *rd;
-       int           b_count;
-       int           b_index;
+       int           b_count;        /* basic block counter                      */
+       int           b_index;        /* basic block index                        */
        int           stackdepth;
-       stackptr      curstack;
+       stackptr      curstack;       /* current stack top                        */
        stackptr      new;
        stackptr      copy;
-       int           opcode, i, j, len, loops;
-       int           superblockend, repeat, deadcode;
-       instruction  *iptr;
-       basicblock   *bptr;
+       int           opcode;         /* opcode of current instruction            */
+       int           i, j;
+       int           len;            /* # of instructions after the current one  */
+       bool          superblockend;  /* if true, no fallthrough to next block    */
+       bool          repeat;         /* if true, outermost loop must run again   */
+       bool          deadcode;       /* true if no live code has been reached    */
+       new_instruction *iptr;        /* the current instruction                  */
+       basicblock   *bptr;           /* the current basic block                  */
        basicblock   *tbptr;
-       s4           *s4ptr;
-       void        **tptr;
-       s4           *last_store;/* instruction index of last XSTORE */
-                                /* [ local_index * 5 + type ] */
-       s4            last_pei;  /* instruction index of last possible exception */
-                                /* used for conflict resolution for copy        */
-                             /* elimination (XLOAD, IINC, XSTORE) */
+       s4           *last_store;     /* instruction index of last XSTORE         */
+                                     /* [ local_index * 5 + type ]               */
+       s4            last_pei;       /* ins. index of last possible exception    */
+                                     /* used for conflict resolution for copy    */
+                                  /* elimination (XLOAD, IINC, XSTORE)        */
        s4            last_dupx;
+       branch_target_t *table;
+       lookup_target_t *lookup;
 #if defined(ENABLE_VERIFIER)
-       int           expectedtype; /* used by CHECK_BASIC_TYPE */
+       int           expectedtype;   /* used by CHECK_BASIC_TYPE                 */
 #endif
-
        builtintable_entry *bte;
        methoddesc         *md;
+       constant_FMIref    *fmiref;
+#if defined(ENABLE_STATISTICS)
+       int           iteration_count;  /* number of iterations of analysis       */
+#endif
 
-       /* get required compiler data */
+#if defined(STACK_VERBOSE)
+       new_show_method(jd, SHOW_PARSE);
+#endif
+
+       /* get required compiler data - initialization */
 
-       m  = jd->m;
-       cd = jd->cd;
-       rd = jd->rd;
+       m    = jd->m;
+       code = jd->code;
+       cd   = jd->cd;
+       rd   = jd->rd;
 
 #if defined(ENABLE_LSRA)
        m->maxlifetimes = 0;
 #endif
 
+#if defined(ENABLE_STATISTICS)
+       iteration_count = 0;
+#endif
+
        last_store = DMNEW(s4 , cd->maxlocals * 5);
-       
-       new = m->stack;
-       loops = 0;
-       m->basicblocks[0].flags = BBREACHED;
-       m->basicblocks[0].instack = 0;
-       m->basicblocks[0].indepth = 0;
+
+       /* initialize in-stack of first block */
+
+       new = jd->new_stack;
+       jd->new_basicblocks[0].flags = BBREACHED;
+       jd->new_basicblocks[0].instack = 0;
+       jd->new_basicblocks[0].indepth = 0;
+
+       /* initialize in-stack of exception handlers */
 
        for (i = 0; i < cd->exceptiontablelength; i++) {
-               bptr = &m->basicblocks[m->basicblockindex[cd->exceptiontable[i].handlerpc]];
+               bptr = BLOCK_OF(cd->exceptiontable[i].handlerpc);
                bptr->flags = BBREACHED;
                bptr->type = BBTYPE_EXH;
                bptr->instack = new;
                bptr->indepth = 1;
-               bptr->pre_count = 10000;
+               bptr->predecessorcount = CFG_UNKNOWN_PREDECESSORS;
                STACKRESET;
                NEWXSTACK;
        }
 
+       /* count predecessors of each block ***************************************/
+
 #if CONDITIONAL_LOADCONST
-       b_count = m->basicblockcount;
-       bptr = m->basicblocks;
-       while (--b_count >= 0) {
-               if (bptr->icount != 0) {
-                       iptr = bptr->iinstr + bptr->icount - 1;
+       /* XXX move this to a separate function */
+       {
+               b_count = jd->new_basicblockcount;
+               bptr = jd->new_basicblocks;
+               for (; --b_count >= 0; bptr++) {
+                       if (bptr->icount == 0)
+                               continue;
+
+                       /* get the last instruction of the block */
+
+                       iptr = /* XXX */ (new_instruction *) bptr->iinstr + (bptr->icount - 1);
+
                        switch (iptr->opc) {
-                       case ICMD_RET:
-                       case ICMD_RETURN:
-                       case ICMD_IRETURN:
-                       case ICMD_LRETURN:
-                       case ICMD_FRETURN:
-                       case ICMD_DRETURN:
-                       case ICMD_ARETURN:
-                       case ICMD_ATHROW:
-                               break;
-
-                       case ICMD_IFEQ:
-                       case ICMD_IFNE:
-                       case ICMD_IFLT:
-                       case ICMD_IFGE:
-                       case ICMD_IFGT:
-                       case ICMD_IFLE:
-
-                       case ICMD_IFNULL:
-                       case ICMD_IFNONNULL:
-
-                       case ICMD_IF_ICMPEQ:
-                       case ICMD_IF_ICMPNE:
-                       case ICMD_IF_ICMPLT:
-                       case ICMD_IF_ICMPGE:
-                       case ICMD_IF_ICMPGT:
-                       case ICMD_IF_ICMPLE:
-
-                       case ICMD_IF_ACMPEQ:
-                       case ICMD_IF_ACMPNE:
-                               bptr[1].pre_count++;
-                       case ICMD_GOTO:
-                               m->basicblocks[m->basicblockindex[iptr->op1]].pre_count++;
-                               break;
-
-                       case ICMD_TABLESWITCH:
-                               s4ptr = iptr->val.a;
-                               m->basicblocks[m->basicblockindex[*s4ptr++]].pre_count++;
-                               i = *s4ptr++;                               /* low     */
-                               i = *s4ptr++ - i + 1;                       /* high    */
-                               while (--i >= 0) {
-                                       m->basicblocks[m->basicblockindex[*s4ptr++]].pre_count++;
-                               }
-                               break;
-                                       
-                       case ICMD_LOOKUPSWITCH:
-                               s4ptr = iptr->val.a;
-                               m->basicblocks[m->basicblockindex[*s4ptr++]].pre_count++;
-                               i = *s4ptr++;                               /* count   */
-                               while (--i >= 0) {
-                                       m->basicblocks[m->basicblockindex[s4ptr[1]]].pre_count++;
-                                       s4ptr += 2;
-                               }
-                               break;
-                       default:
-                               bptr[1].pre_count++;
-                               break;
-                       }
-               }
-               bptr++;
+                               /* instruction stopping control flow */
+                               case ICMD_RET:
+                               case ICMD_RETURN:
+                               case ICMD_IRETURN:
+                               case ICMD_LRETURN:
+                               case ICMD_FRETURN:
+                               case ICMD_DRETURN:
+                               case ICMD_ARETURN:
+                               case ICMD_ATHROW:
+                                       break;
+
+                                       /* conditional branches */
+                               case ICMD_IFEQ:
+                               case ICMD_IFNE:
+                               case ICMD_IFLT:
+                               case ICMD_IFGE:
+                               case ICMD_IFGT:
+                               case ICMD_IFLE:
+                               case ICMD_IFNULL:
+                               case ICMD_IFNONNULL:
+                               case ICMD_IF_ICMPEQ:
+                               case ICMD_IF_ICMPNE:
+                               case ICMD_IF_ICMPLT:
+                               case ICMD_IF_ICMPGE:
+                               case ICMD_IF_ICMPGT:
+                               case ICMD_IF_ICMPLE:
+                               case ICMD_IF_ACMPEQ:
+                               case ICMD_IF_ACMPNE:
+                                       /* XXX add missing conditional branches */
+                                       bptr[1].predecessorcount++;
+                                       /* FALLTHROUGH */
+
+                                       /* unconditional branch */
+                               case ICMD_GOTO:
+                                       BLOCK_OF(iptr->dst.insindex)->predecessorcount++;
+                                       break;
+
+                                       /* switches */
+                               case ICMD_TABLESWITCH:
+                                       table = iptr->dst.table;
+                                       BLOCK_OF((table++)->insindex)->predecessorcount++;
+                                       i = iptr->sx.s23.s3.tablehigh
+                                               - iptr->sx.s23.s2.tablelow + 1;
+                                       while (--i >= 0) {
+                                               BLOCK_OF((table++)->insindex)->predecessorcount++;
+                                       }
+                                       break;
+
+                               case ICMD_LOOKUPSWITCH:
+                                       lookup = iptr->dst.lookup;
+                                       BLOCK_OF(iptr->sx.s23.s3.lookupdefault.insindex)->predecessorcount++;
+                                       i = iptr->sx.s23.s2.lookupcount;
+                                       while (--i >= 0) {
+                                               BLOCK_OF((lookup++)->target.insindex)->predecessorcount++;
+                                       }
+                                       break;
+
+                                       /* default - fall into next block */
+                               default:
+                                       bptr[1].predecessorcount++;
+                                       break;
+                       } /* end switch */
+               } /* end basic block loop */
        }
 #endif /* CONDITIONAL_LOADCONST */
 
+       /* stack analysis loop (until fixpoint reached) **************************/
 
        do {
-               loops++;
-               b_count = m->basicblockcount;
-               bptr = m->basicblocks;
+#if defined(ENABLE_STATISTICS)
+               iteration_count++;
+#endif
+
+               /* initialize loop over basic blocks */
+
+               b_count = jd->new_basicblockcount;
+               bptr = jd->new_basicblocks;
                superblockend = true;
                repeat = false;
                STACKRESET;
                deadcode = true;
 
+               /* iterate over basic blocks *****************************************/
+
                while (--b_count >= 0) {
+#if defined(STACK_VERBOSE)
+                       printf("ANALYZING BLOCK L%03d\n", bptr->nr);
+#endif
+
                        if (bptr->flags == BBDELETED) {
-                               /* do nothing */
-                       } 
+                               /* This block has been deleted - do nothing. */
+                       }
                        else if (superblockend && (bptr->flags < BBREACHED)) {
+                               /* This block has not been reached so far, and we      */
+                               /* don't fall into it, so we'll have to iterate again. */
                                repeat = true;
-                       } 
+                       }
                        else if (bptr->flags <= BBREACHED) {
                                if (superblockend) {
+                                       /* We know that bptr->flags == BBREACHED. */
+                                       /* This block has been reached before.    */
                                        stackdepth = bptr->indepth;
-                               } 
+                               }
                                else if (bptr->flags < BBREACHED) {
+                                       /* This block is reached for the first time now */
+                                       /* by falling through from the previous block.  */
                                        COPYCURSTACK(copy);
                                        bptr->instack = copy;
                                        bptr->indepth = stackdepth;
-                               } 
+                               }
                                else {
+                                       /* This block has been reached before. now we are */
+                                       /* falling into it from the previous block.       */
+                                       /* Check that stack depth is well-defined.        */
                                        CHECK_STACK_DEPTH(bptr->indepth, stackdepth);
                                }
 
+                               /* set up local variables for analyzing this block */
+
                                curstack = bptr->instack;
                                deadcode = false;
                                superblockend = false;
                                bptr->flags = BBFINISHED;
                                len = bptr->icount;
-                               iptr = bptr->iinstr;
-                               b_index = bptr - m->basicblocks;
+                               iptr = /* XXX */ (new_instruction *) bptr->iinstr;
+                               b_index = bptr - jd->new_basicblocks;
+
+                               /* reset variables for dependency checking */
 
                                last_pei = -1;
                                last_dupx = -1;
@@ -305,324 +599,348 @@ bool stack_analyse(jitdata *jd)
                                        for( j = 0; j < 5; j++)
                                                last_store[5 * i + j] = -1;
 
+                               /* XXX store the start of the block's stack representation */
+
                                bptr->stack = new;
 
+                               /* iterate over ICMDs ****************************************/
+
                                while (--len >= 0)  {
+#if defined(STACK_VERBOSE)
+                                       new_show_icmd(jd, iptr, false, SHOW_PARSE); printf("\n");
+                                       for( copy = curstack; copy; copy = copy->prev ) {
+                                               printf("%d ", copy->type);
+                                       }
+                                       printf("\n");
+#endif
+
+                                       /* fetch the current opcode */
+
                                        opcode = iptr->opc;
 
+                                       /* automatically replace some ICMDs with builtins */
+
 #if defined(USEBUILTINTABLE)
-# if defined(ENABLE_INTRP)
-                                       if (!opt_intrp) {
-# endif
+                                       IF_NO_INTRP(
                                                bte = builtintable_get_automatic(opcode);
 
                                                if (bte && bte->opcode == opcode) {
-                                                       iptr->opc = ICMD_BUILTIN;
-                                                       iptr->op1 = false;   /* don't check for exception */
-                                                       iptr->val.a = bte;
-                                                       m->isleafmethod = false;
-                                                       goto builtin;
+                                                       iptr->opc           = ICMD_BUILTIN;
+                                                       iptr->flags.bits    = INS_FLAG_NOCHECK;
+                                                       iptr->sx.s23.s3.bte = bte;
+                                                       /* iptr->line is already set */
+                                                       jd->isleafmethod = false;
+                                                       goto icmd_BUILTIN;
                                                }
-# if defined(ENABLE_INTRP)
-                                       }
-# endif
+                                       );
 #endif /* defined(USEBUILTINTABLE) */
 
-                                       /* this is the main switch */
+                                       /* main opcode switch *************************************/
 
                                        switch (opcode) {
 
                                                /* pop 0 push 0 */
 
-                                       case ICMD_CHECKNULL:
-                                               COUNT(count_check_null);
                                        case ICMD_NOP:
+icmd_NOP:
+                                               CLR_SX;
+                                               NEW_OP0_0;
+                                               break;
 
-                                       case ICMD_IFEQ_ICONST:
-                                       case ICMD_IFNE_ICONST:
-                                       case ICMD_IFLT_ICONST:
-                                       case ICMD_IFGE_ICONST:
-                                       case ICMD_IFGT_ICONST:
-                                       case ICMD_IFLE_ICONST:
-                                       case ICMD_ELSE_ICONST:
-                                               SETDST;
+                                       case ICMD_CHECKNULL:
+                                               COUNT(count_check_null);
+                                               USE_S1(TYPE_ADR);
+                                               CLR_SX;
+                                               CLR_DST; /* XXX live through? */
                                                break;
 
                                        case ICMD_RET:
-#if defined(ENABLE_INTRP)
-                                               if (!opt_intrp)
-#endif
-                                                       rd->locals[iptr->op1][TYPE_ADR].type = TYPE_ADR;
+                                               USE_S1_LOCAL(TYPE_ADR);
+                                               CLR_SX;
+                                               CLR_DST;
+                                               IF_NO_INTRP( rd->locals[iptr->s1.localindex][TYPE_ADR].type = TYPE_ADR; );
+                                               superblockend = true;
+                                               break;
+
                                        case ICMD_RETURN:
                                                COUNT(count_pcmd_return);
-                                               SETDST;
+                                               CLR_SX;
+                                               NEW_OP0_0;
                                                superblockend = true;
                                                break;
 
+
                                                /* pop 0 push 1 const */
-                                               
+
+       /************************** ICONST OPTIMIZATIONS **************************/
+
                                        case ICMD_ICONST:
                                                COUNT(count_pcmd_load);
-                                               if (len > 0) {
-                                                       switch (iptr[1].opc) {
+                                               if (len == 0)
+                                                       goto normal_ICONST;
+
+                                               switch (iptr[1].opc) {
                                                        case ICMD_IADD:
-                                                               iptr[0].opc = ICMD_IADDCONST;
+                                                               iptr->opc = ICMD_IADDCONST;
+                                                               /* FALLTHROUGH */
+
                                                        icmd_iconst_tail:
                                                                iptr[1].opc = ICMD_NOP;
-                                                               OP1_1(TYPE_INT, TYPE_INT);
+                                                               NEW_OP1_1(TYPE_INT, TYPE_INT);
                                                                COUNT(count_pcmd_op);
                                                                break;
+
                                                        case ICMD_ISUB:
-                                                               iptr[0].opc = ICMD_ISUBCONST;
+                                                               iptr->opc = ICMD_ISUBCONST;
                                                                goto icmd_iconst_tail;
 #if SUPPORT_CONST_MUL
                                                        case ICMD_IMUL:
-                                                               iptr[0].opc = ICMD_IMULCONST;
+                                                               iptr->opc = ICMD_IMULCONST;
                                                                goto icmd_iconst_tail;
 #else /* SUPPORT_CONST_MUL */
                                                        case ICMD_IMUL:
-                                                               if (iptr[0].val.i == 0x00000002)
-                                                                       iptr[0].val.i = 1;
-                                                               else if (iptr[0].val.i == 0x00000004)
-                                                                       iptr[0].val.i = 2;
-                                                               else if (iptr[0].val.i == 0x00000008)
-                                                                       iptr[0].val.i = 3;
-                                                               else if (iptr[0].val.i == 0x00000010)
-                                                                       iptr[0].val.i = 4;
-                                                               else if (iptr[0].val.i == 0x00000020)
-                                                                       iptr[0].val.i = 5;
-                                                               else if (iptr[0].val.i == 0x00000040)
-                                                                       iptr[0].val.i = 6;
-                                                               else if (iptr[0].val.i == 0x00000080)
-                                                                       iptr[0].val.i = 7;
-                                                               else if (iptr[0].val.i == 0x00000100)
-                                                                       iptr[0].val.i = 8;
-                                                               else if (iptr[0].val.i == 0x00000200)
-                                                                       iptr[0].val.i = 9;
-                                                               else if (iptr[0].val.i == 0x00000400)
-                                                                       iptr[0].val.i = 10;
-                                                               else if (iptr[0].val.i == 0x00000800)
-                                                                       iptr[0].val.i = 11;
-                                                               else if (iptr[0].val.i == 0x00001000)
-                                                                       iptr[0].val.i = 12;
-                                                               else if (iptr[0].val.i == 0x00002000)
-                                                                       iptr[0].val.i = 13;
-                                                               else if (iptr[0].val.i == 0x00004000)
-                                                                       iptr[0].val.i = 14;
-                                                               else if (iptr[0].val.i == 0x00008000)
-                                                                       iptr[0].val.i = 15;
-                                                               else if (iptr[0].val.i == 0x00010000)
-                                                                       iptr[0].val.i = 16;
-                                                               else if (iptr[0].val.i == 0x00020000)
-                                                                       iptr[0].val.i = 17;
-                                                               else if (iptr[0].val.i == 0x00040000)
-                                                                       iptr[0].val.i = 18;
-                                                               else if (iptr[0].val.i == 0x00080000)
-                                                                       iptr[0].val.i = 19;
-                                                               else if (iptr[0].val.i == 0x00100000)
-                                                                       iptr[0].val.i = 20;
-                                                               else if (iptr[0].val.i == 0x00200000)
-                                                                       iptr[0].val.i = 21;
-                                                               else if (iptr[0].val.i == 0x00400000)
-                                                                       iptr[0].val.i = 22;
-                                                               else if (iptr[0].val.i == 0x00800000)
-                                                                       iptr[0].val.i = 23;
-                                                               else if (iptr[0].val.i == 0x01000000)
-                                                                       iptr[0].val.i = 24;
-                                                               else if (iptr[0].val.i == 0x02000000)
-                                                                       iptr[0].val.i = 25;
-                                                               else if (iptr[0].val.i == 0x04000000)
-                                                                       iptr[0].val.i = 26;
-                                                               else if (iptr[0].val.i == 0x08000000)
-                                                                       iptr[0].val.i = 27;
-                                                               else if (iptr[0].val.i == 0x10000000)
-                                                                       iptr[0].val.i = 28;
-                                                               else if (iptr[0].val.i == 0x20000000)
-                                                                       iptr[0].val.i = 29;
-                                                               else if (iptr[0].val.i == 0x40000000)
-                                                                       iptr[0].val.i = 30;
-                                                               else if (iptr[0].val.i == 0x80000000)
-                                                                       iptr[0].val.i = 31;
-                                                               else {
-                                                                       PUSHCONST(TYPE_INT);
-                                                                       break;
-                                                               }
-                                                               iptr[0].opc = ICMD_IMULPOW2;
+                                                               if (iptr->sx.val.i == 0x00000002)
+                                                                       iptr->sx.val.i = 1;
+                                                               else if (iptr->sx.val.i == 0x00000004)
+                                                                       iptr->sx.val.i = 2;
+                                                               else if (iptr->sx.val.i == 0x00000008)
+                                                                       iptr->sx.val.i = 3;
+                                                               else if (iptr->sx.val.i == 0x00000010)
+                                                                       iptr->sx.val.i = 4;
+                                                               else if (iptr->sx.val.i == 0x00000020)
+                                                                       iptr->sx.val.i = 5;
+                                                               else if (iptr->sx.val.i == 0x00000040)
+                                                                       iptr->sx.val.i = 6;
+                                                               else if (iptr->sx.val.i == 0x00000080)
+                                                                       iptr->sx.val.i = 7;
+                                                               else if (iptr->sx.val.i == 0x00000100)
+                                                                       iptr->sx.val.i = 8;
+                                                               else if (iptr->sx.val.i == 0x00000200)
+                                                                       iptr->sx.val.i = 9;
+                                                               else if (iptr->sx.val.i == 0x00000400)
+                                                                       iptr->sx.val.i = 10;
+                                                               else if (iptr->sx.val.i == 0x00000800)
+                                                                       iptr->sx.val.i = 11;
+                                                               else if (iptr->sx.val.i == 0x00001000)
+                                                                       iptr->sx.val.i = 12;
+                                                               else if (iptr->sx.val.i == 0x00002000)
+                                                                       iptr->sx.val.i = 13;
+                                                               else if (iptr->sx.val.i == 0x00004000)
+                                                                       iptr->sx.val.i = 14;
+                                                               else if (iptr->sx.val.i == 0x00008000)
+                                                                       iptr->sx.val.i = 15;
+                                                               else if (iptr->sx.val.i == 0x00010000)
+                                                                       iptr->sx.val.i = 16;
+                                                               else if (iptr->sx.val.i == 0x00020000)
+                                                                       iptr->sx.val.i = 17;
+                                                               else if (iptr->sx.val.i == 0x00040000)
+                                                                       iptr->sx.val.i = 18;
+                                                               else if (iptr->sx.val.i == 0x00080000)
+                                                                       iptr->sx.val.i = 19;
+                                                               else if (iptr->sx.val.i == 0x00100000)
+                                                                       iptr->sx.val.i = 20;
+                                                               else if (iptr->sx.val.i == 0x00200000)
+                                                                       iptr->sx.val.i = 21;
+                                                               else if (iptr->sx.val.i == 0x00400000)
+                                                                       iptr->sx.val.i = 22;
+                                                               else if (iptr->sx.val.i == 0x00800000)
+                                                                       iptr->sx.val.i = 23;
+                                                               else if (iptr->sx.val.i == 0x01000000)
+                                                                       iptr->sx.val.i = 24;
+                                                               else if (iptr->sx.val.i == 0x02000000)
+                                                                       iptr->sx.val.i = 25;
+                                                               else if (iptr->sx.val.i == 0x04000000)
+                                                                       iptr->sx.val.i = 26;
+                                                               else if (iptr->sx.val.i == 0x08000000)
+                                                                       iptr->sx.val.i = 27;
+                                                               else if (iptr->sx.val.i == 0x10000000)
+                                                                       iptr->sx.val.i = 28;
+                                                               else if (iptr->sx.val.i == 0x20000000)
+                                                                       iptr->sx.val.i = 29;
+                                                               else if (iptr->sx.val.i == 0x40000000)
+                                                                       iptr->sx.val.i = 30;
+                                                               else if (iptr->sx.val.i == 0x80000000)
+                                                                       iptr->sx.val.i = 31;
+                                                               else
+                                                                       goto normal_ICONST;
+
+                                                               iptr->opc = ICMD_IMULPOW2;
                                                                goto icmd_iconst_tail;
 #endif /* SUPPORT_CONST_MUL */
                                                        case ICMD_IDIV:
-                                                               if (iptr[0].val.i == 0x00000002)
-                                                                       iptr[0].val.i = 1;
-                                                               else if (iptr[0].val.i == 0x00000004)
-                                                                       iptr[0].val.i = 2;
-                                                               else if (iptr[0].val.i == 0x00000008)
-                                                                       iptr[0].val.i = 3;
-                                                               else if (iptr[0].val.i == 0x00000010)
-                                                                       iptr[0].val.i = 4;
-                                                               else if (iptr[0].val.i == 0x00000020)
-                                                                       iptr[0].val.i = 5;
-                                                               else if (iptr[0].val.i == 0x00000040)
-                                                                       iptr[0].val.i = 6;
-                                                               else if (iptr[0].val.i == 0x00000080)
-                                                                       iptr[0].val.i = 7;
-                                                               else if (iptr[0].val.i == 0x00000100)
-                                                                       iptr[0].val.i = 8;
-                                                               else if (iptr[0].val.i == 0x00000200)
-                                                                       iptr[0].val.i = 9;
-                                                               else if (iptr[0].val.i == 0x00000400)
-                                                                       iptr[0].val.i = 10;
-                                                               else if (iptr[0].val.i == 0x00000800)
-                                                                       iptr[0].val.i = 11;
-                                                               else if (iptr[0].val.i == 0x00001000)
-                                                                       iptr[0].val.i = 12;
-                                                               else if (iptr[0].val.i == 0x00002000)
-                                                                       iptr[0].val.i = 13;
-                                                               else if (iptr[0].val.i == 0x00004000)
-                                                                       iptr[0].val.i = 14;
-                                                               else if (iptr[0].val.i == 0x00008000)
-                                                                       iptr[0].val.i = 15;
-                                                               else if (iptr[0].val.i == 0x00010000)
-                                                                       iptr[0].val.i = 16;
-                                                               else if (iptr[0].val.i == 0x00020000)
-                                                                       iptr[0].val.i = 17;
-                                                               else if (iptr[0].val.i == 0x00040000)
-                                                                       iptr[0].val.i = 18;
-                                                               else if (iptr[0].val.i == 0x00080000)
-                                                                       iptr[0].val.i = 19;
-                                                               else if (iptr[0].val.i == 0x00100000)
-                                                                       iptr[0].val.i = 20;
-                                                               else if (iptr[0].val.i == 0x00200000)
-                                                                       iptr[0].val.i = 21;
-                                                               else if (iptr[0].val.i == 0x00400000)
-                                                                       iptr[0].val.i = 22;
-                                                               else if (iptr[0].val.i == 0x00800000)
-                                                                       iptr[0].val.i = 23;
-                                                               else if (iptr[0].val.i == 0x01000000)
-                                                                       iptr[0].val.i = 24;
-                                                               else if (iptr[0].val.i == 0x02000000)
-                                                                       iptr[0].val.i = 25;
-                                                               else if (iptr[0].val.i == 0x04000000)
-                                                                       iptr[0].val.i = 26;
-                                                               else if (iptr[0].val.i == 0x08000000)
-                                                                       iptr[0].val.i = 27;
-                                                               else if (iptr[0].val.i == 0x10000000)
-                                                                       iptr[0].val.i = 28;
-                                                               else if (iptr[0].val.i == 0x20000000)
-                                                                       iptr[0].val.i = 29;
-                                                               else if (iptr[0].val.i == 0x40000000)
-                                                                       iptr[0].val.i = 30;
-                                                               else if (iptr[0].val.i == 0x80000000)
-                                                                       iptr[0].val.i = 31;
-                                                               else {
-                                                                       PUSHCONST(TYPE_INT);
-                                                                       break;
-                                                               }
-                                                               iptr[0].opc = ICMD_IDIVPOW2;
+                                                               if (iptr->sx.val.i == 0x00000002)
+                                                                       iptr->sx.val.i = 1;
+                                                               else if (iptr->sx.val.i == 0x00000004)
+                                                                       iptr->sx.val.i = 2;
+                                                               else if (iptr->sx.val.i == 0x00000008)
+                                                                       iptr->sx.val.i = 3;
+                                                               else if (iptr->sx.val.i == 0x00000010)
+                                                                       iptr->sx.val.i = 4;
+                                                               else if (iptr->sx.val.i == 0x00000020)
+                                                                       iptr->sx.val.i = 5;
+                                                               else if (iptr->sx.val.i == 0x00000040)
+                                                                       iptr->sx.val.i = 6;
+                                                               else if (iptr->sx.val.i == 0x00000080)
+                                                                       iptr->sx.val.i = 7;
+                                                               else if (iptr->sx.val.i == 0x00000100)
+                                                                       iptr->sx.val.i = 8;
+                                                               else if (iptr->sx.val.i == 0x00000200)
+                                                                       iptr->sx.val.i = 9;
+                                                               else if (iptr->sx.val.i == 0x00000400)
+                                                                       iptr->sx.val.i = 10;
+                                                               else if (iptr->sx.val.i == 0x00000800)
+                                                                       iptr->sx.val.i = 11;
+                                                               else if (iptr->sx.val.i == 0x00001000)
+                                                                       iptr->sx.val.i = 12;
+                                                               else if (iptr->sx.val.i == 0x00002000)
+                                                                       iptr->sx.val.i = 13;
+                                                               else if (iptr->sx.val.i == 0x00004000)
+                                                                       iptr->sx.val.i = 14;
+                                                               else if (iptr->sx.val.i == 0x00008000)
+                                                                       iptr->sx.val.i = 15;
+                                                               else if (iptr->sx.val.i == 0x00010000)
+                                                                       iptr->sx.val.i = 16;
+                                                               else if (iptr->sx.val.i == 0x00020000)
+                                                                       iptr->sx.val.i = 17;
+                                                               else if (iptr->sx.val.i == 0x00040000)
+                                                                       iptr->sx.val.i = 18;
+                                                               else if (iptr->sx.val.i == 0x00080000)
+                                                                       iptr->sx.val.i = 19;
+                                                               else if (iptr->sx.val.i == 0x00100000)
+                                                                       iptr->sx.val.i = 20;
+                                                               else if (iptr->sx.val.i == 0x00200000)
+                                                                       iptr->sx.val.i = 21;
+                                                               else if (iptr->sx.val.i == 0x00400000)
+                                                                       iptr->sx.val.i = 22;
+                                                               else if (iptr->sx.val.i == 0x00800000)
+                                                                       iptr->sx.val.i = 23;
+                                                               else if (iptr->sx.val.i == 0x01000000)
+                                                                       iptr->sx.val.i = 24;
+                                                               else if (iptr->sx.val.i == 0x02000000)
+                                                                       iptr->sx.val.i = 25;
+                                                               else if (iptr->sx.val.i == 0x04000000)
+                                                                       iptr->sx.val.i = 26;
+                                                               else if (iptr->sx.val.i == 0x08000000)
+                                                                       iptr->sx.val.i = 27;
+                                                               else if (iptr->sx.val.i == 0x10000000)
+                                                                       iptr->sx.val.i = 28;
+                                                               else if (iptr->sx.val.i == 0x20000000)
+                                                                       iptr->sx.val.i = 29;
+                                                               else if (iptr->sx.val.i == 0x40000000)
+                                                                       iptr->sx.val.i = 30;
+                                                               else if (iptr->sx.val.i == 0x80000000)
+                                                                       iptr->sx.val.i = 31;
+                                                               else
+                                                                       goto normal_ICONST;
+
+                                                               iptr->opc = ICMD_IDIVPOW2;
                                                                goto icmd_iconst_tail;
+
                                                        case ICMD_IREM:
                                                                /*log_text("stack.c: ICMD_ICONST/ICMD_IREM");*/
-                                                               if ((iptr[0].val.i == 0x00000002) ||
-                                                                       (iptr[0].val.i == 0x00000004) ||
-                                                                       (iptr[0].val.i == 0x00000008) ||
-                                                                       (iptr[0].val.i == 0x00000010) ||
-                                                                       (iptr[0].val.i == 0x00000020) ||
-                                                                       (iptr[0].val.i == 0x00000040) ||
-                                                                       (iptr[0].val.i == 0x00000080) ||
-                                                                       (iptr[0].val.i == 0x00000100) ||
-                                                                       (iptr[0].val.i == 0x00000200) ||
-                                                                       (iptr[0].val.i == 0x00000400) ||
-                                                                       (iptr[0].val.i == 0x00000800) ||
-                                                                       (iptr[0].val.i == 0x00001000) ||
-                                                                       (iptr[0].val.i == 0x00002000) ||
-                                                                       (iptr[0].val.i == 0x00004000) ||
-                                                                       (iptr[0].val.i == 0x00008000) ||
-                                                                       (iptr[0].val.i == 0x00010000) ||
-                                                                       (iptr[0].val.i == 0x00020000) ||
-                                                                       (iptr[0].val.i == 0x00040000) ||
-                                                                       (iptr[0].val.i == 0x00080000) ||
-                                                                       (iptr[0].val.i == 0x00100000) ||
-                                                                       (iptr[0].val.i == 0x00200000) ||
-                                                                       (iptr[0].val.i == 0x00400000) ||
-                                                                       (iptr[0].val.i == 0x00800000) ||
-                                                                       (iptr[0].val.i == 0x01000000) ||
-                                                                       (iptr[0].val.i == 0x02000000) ||
-                                                                       (iptr[0].val.i == 0x04000000) ||
-                                                                       (iptr[0].val.i == 0x08000000) ||
-                                                                       (iptr[0].val.i == 0x10000000) ||
-                                                                       (iptr[0].val.i == 0x20000000) ||
-                                                                       (iptr[0].val.i == 0x40000000) ||
-                                                                       (iptr[0].val.i == 0x80000000)) {
-                                                                       iptr[0].opc = ICMD_IREMPOW2;
-                                                                       iptr[0].val.i -= 1;
+                                                               if ((iptr->sx.val.i == 0x00000002) ||
+                                                                       (iptr->sx.val.i == 0x00000004) ||
+                                                                       (iptr->sx.val.i == 0x00000008) ||
+                                                                       (iptr->sx.val.i == 0x00000010) ||
+                                                                       (iptr->sx.val.i == 0x00000020) ||
+                                                                       (iptr->sx.val.i == 0x00000040) ||
+                                                                       (iptr->sx.val.i == 0x00000080) ||
+                                                                       (iptr->sx.val.i == 0x00000100) ||
+                                                                       (iptr->sx.val.i == 0x00000200) ||
+                                                                       (iptr->sx.val.i == 0x00000400) ||
+                                                                       (iptr->sx.val.i == 0x00000800) ||
+                                                                       (iptr->sx.val.i == 0x00001000) ||
+                                                                       (iptr->sx.val.i == 0x00002000) ||
+                                                                       (iptr->sx.val.i == 0x00004000) ||
+                                                                       (iptr->sx.val.i == 0x00008000) ||
+                                                                       (iptr->sx.val.i == 0x00010000) ||
+                                                                       (iptr->sx.val.i == 0x00020000) ||
+                                                                       (iptr->sx.val.i == 0x00040000) ||
+                                                                       (iptr->sx.val.i == 0x00080000) ||
+                                                                       (iptr->sx.val.i == 0x00100000) ||
+                                                                       (iptr->sx.val.i == 0x00200000) ||
+                                                                       (iptr->sx.val.i == 0x00400000) ||
+                                                                       (iptr->sx.val.i == 0x00800000) ||
+                                                                       (iptr->sx.val.i == 0x01000000) ||
+                                                                       (iptr->sx.val.i == 0x02000000) ||
+                                                                       (iptr->sx.val.i == 0x04000000) ||
+                                                                       (iptr->sx.val.i == 0x08000000) ||
+                                                                       (iptr->sx.val.i == 0x10000000) ||
+                                                                       (iptr->sx.val.i == 0x20000000) ||
+                                                                       (iptr->sx.val.i == 0x40000000) ||
+                                                                       (iptr->sx.val.i == 0x80000000))
+                                                               {
+                                                                       iptr->opc = ICMD_IREMPOW2;
+                                                                       iptr->sx.val.i -= 1;
                                                                        goto icmd_iconst_tail;
                                                                }
-                                                               PUSHCONST(TYPE_INT);
-                                                               break;
+                                                               goto normal_ICONST;
 #if SUPPORT_CONST_LOGICAL
                                                        case ICMD_IAND:
-                                                               iptr[0].opc = ICMD_IANDCONST;
+                                                               iptr->opc = ICMD_IANDCONST;
                                                                goto icmd_iconst_tail;
+
                                                        case ICMD_IOR:
-                                                               iptr[0].opc = ICMD_IORCONST;
+                                                               iptr->opc = ICMD_IORCONST;
                                                                goto icmd_iconst_tail;
+
                                                        case ICMD_IXOR:
-                                                               iptr[0].opc = ICMD_IXORCONST;
+                                                               iptr->opc = ICMD_IXORCONST;
                                                                goto icmd_iconst_tail;
+
 #endif /* SUPPORT_CONST_LOGICAL */
                                                        case ICMD_ISHL:
-                                                               iptr[0].opc = ICMD_ISHLCONST;
+                                                               iptr->opc = ICMD_ISHLCONST;
                                                                goto icmd_iconst_tail;
+
                                                        case ICMD_ISHR:
-                                                               iptr[0].opc = ICMD_ISHRCONST;
+                                                               iptr->opc = ICMD_ISHRCONST;
                                                                goto icmd_iconst_tail;
+
                                                        case ICMD_IUSHR:
-                                                               iptr[0].opc = ICMD_IUSHRCONST;
+                                                               iptr->opc = ICMD_IUSHRCONST;
                                                                goto icmd_iconst_tail;
 #if SUPPORT_LONG_SHIFT
                                                        case ICMD_LSHL:
-                                                               iptr[0].opc = ICMD_LSHLCONST;
+                                                               iptr->opc = ICMD_LSHLCONST;
                                                                goto icmd_lconst_tail;
+
                                                        case ICMD_LSHR:
-                                                               iptr[0].opc = ICMD_LSHRCONST;
+                                                               iptr->opc = ICMD_LSHRCONST;
                                                                goto icmd_lconst_tail;
+
                                                        case ICMD_LUSHR:
-                                                               iptr[0].opc = ICMD_LUSHRCONST;
+                                                               iptr->opc = ICMD_LUSHRCONST;
                                                                goto icmd_lconst_tail;
 #endif /* SUPPORT_LONG_SHIFT */
                                                        case ICMD_IF_ICMPEQ:
                                                                iptr[1].opc = ICMD_IFEQ;
+                                                               /* FALLTHROUGH */
+
                                                        icmd_if_icmp_tail:
-/*                                                             iptr[0].op1 = iptr[1].op1; */
-                                                               /* IF_ICMPxx is the last instruction in the  
-                                                                  basic block, just remove it. */
-                                                               iptr[0].opc = ICMD_NOP;
-                                                               iptr[1].val.i = iptr[0].val.i;
-                                                               SETDST;
-/*                                                             bptr->icount--; */
-/*                                                             len--; */
-#if 0
-                                                               OP1_0(TYPE_INT);
-                                                               tbptr = m->basicblocks +
-                                                                       m->basicblockindex[iptr[1].op1];
+                                                               /* set the constant for the following icmd */
+                                                               iptr[1].sx.val.i = iptr->sx.val.i;
 
-                                                               iptr[1].target = (void *) tbptr;
+                                                               /* this instruction becomes a nop */
+                                                               iptr->opc = ICMD_NOP;
+                                                               goto icmd_NOP;
 
-                                                               MARKREACHED(tbptr, copy);
-                                                               COUNT(count_pcmd_bra);
-#endif
-                                                               break;
                                                        case ICMD_IF_ICMPLT:
                                                                iptr[1].opc = ICMD_IFLT;
                                                                goto icmd_if_icmp_tail;
+
                                                        case ICMD_IF_ICMPLE:
                                                                iptr[1].opc = ICMD_IFLE;
                                                                goto icmd_if_icmp_tail;
+
                                                        case ICMD_IF_ICMPNE:
                                                                iptr[1].opc = ICMD_IFNE;
                                                                goto icmd_if_icmp_tail;
+
                                                        case ICMD_IF_ICMPGT:
                                                                iptr[1].opc = ICMD_IFGT;
                                                                goto icmd_if_icmp_tail;
+
                                                        case ICMD_IF_ICMPGE:
                                                                iptr[1].opc = ICMD_IFGE;
                                                                goto icmd_if_icmp_tail;
@@ -632,486 +950,492 @@ bool stack_analyse(jitdata *jd)
                                                        case ICMD_BASTORE:
                                                        case ICMD_CASTORE:
                                                        case ICMD_SASTORE:
-# if defined(ENABLE_INTRP)
-                                                               if (!opt_intrp) {
-# endif
-# if SUPPORT_CONST_STORE_ZERO_ONLY
-                                                                       if (iptr[0].val.i == 0) {
-# endif /* SUPPORT_CONST_STORE_ZERO_ONLY */
-                                                                               switch (iptr[1].opc) {
-                                                                               case ICMD_IASTORE:
-                                                                                       iptr[0].opc = ICMD_IASTORECONST;
-                                                                                       break;
-                                                                               case ICMD_BASTORE:
-                                                                                       iptr[0].opc = ICMD_BASTORECONST;
-                                                                                       break;
-                                                                               case ICMD_CASTORE:
-                                                                                       iptr[0].opc = ICMD_CASTORECONST;
-                                                                                       break;
-                                                                               case ICMD_SASTORE:
-                                                                                       iptr[0].opc = ICMD_SASTORECONST;
-                                                                                       break;
-                                                                               }
-
-                                                                               iptr[1].opc = ICMD_NOP;
-                                                                               OPTT2_0(TYPE_INT, TYPE_ADR);
-                                                                               COUNT(count_pcmd_op);
+                                                               IF_INTRP( goto normal_ICONST; )
 # if SUPPORT_CONST_STORE_ZERO_ONLY
-                                                                       } 
-                                                                       else
-                                                                               PUSHCONST(TYPE_INT);
-# endif /* SUPPORT_CONST_STORE_ZERO_ONLY */
-# if defined(ENABLE_INTRP)
-                                                               } 
-                                                               else
-                                                                       PUSHCONST(TYPE_INT);
+                                                               if (iptr->sx.val.i != 0)
+                                                                       goto normal_ICONST;
 # endif
+                                                               switch (iptr[1].opc) {
+                                                                       case ICMD_IASTORE:
+                                                                               iptr->opc = ICMD_IASTORECONST;
+                                                                               break;
+                                                                       case ICMD_BASTORE:
+                                                                               iptr->opc = ICMD_BASTORECONST;
+                                                                               break;
+                                                                       case ICMD_CASTORE:
+                                                                               iptr->opc = ICMD_CASTORECONST;
+                                                                               break;
+                                                                       case ICMD_SASTORE:
+                                                                               iptr->opc = ICMD_SASTORECONST;
+                                                                               break;
+                                                               }
+
+                                                               iptr[1].opc = ICMD_NOP;
+
+                                                               /* copy the constant to s3 */
+                                                               /* XXX constval -> astoreconstval? */
+                                                               iptr->sx.s23.s3.constval = iptr->sx.val.i;
+                                                               NEW_OP2_0(TYPE_ADR, TYPE_INT);
+                                                               COUNT(count_pcmd_op);
                                                                break;
 
                                                        case ICMD_PUTSTATIC:
                                                        case ICMD_PUTFIELD:
-# if defined(ENABLE_INTRP)
-                                                               if (!opt_intrp) {
-# endif
+                                                               IF_INTRP( goto normal_ICONST; )
 # if SUPPORT_CONST_STORE_ZERO_ONLY
-                                                                       if (iptr[0].val.i == 0) { /* XXX check val.l? */
-# endif /* SUPPORT_CONST_STORE_ZERO_ONLY */
-                                                                               switch (iptr[1].opc) {
-                                                                               case ICMD_PUTSTATIC:
-                                                                                       iptr[0].opc = ICMD_PUTSTATICCONST;
-                                                                                       SETDST;
-                                                                                       break;
-                                                                               case ICMD_PUTFIELD:
-                                                                                       iptr[0].opc = ICMD_PUTFIELDCONST;
-                                                                                       OP1_0(TYPE_ADR);
-                                                                                       break;
-                                                                               }
-
-                                                                               iptr[1].opc = ICMD_NOP;
-                                                                               iptr[0].op1 = TYPE_INT;
-                                                                               COUNT(count_pcmd_op);
-# if SUPPORT_CONST_STORE_ZERO_ONLY
-                                                                       } 
-                                                                       else
-                                                                               PUSHCONST(TYPE_INT);
-# endif /* SUPPORT_CONST_STORE_ZERO_ONLY */
-# if defined(ENABLE_INTRP)
-                                                               } 
-                                                               else
-                                                                       PUSHCONST(TYPE_INT);
+                                                               if (iptr->sx.val.i != 0)
+                                                                       goto normal_ICONST;
 # endif
+                                                               /* XXX check field type? */
+
+                                                               /* copy the constant to s2 */
+                                                               /* XXX constval -> fieldconstval? */
+                                                               iptr->sx.s23.s2.constval = iptr->sx.val.i;
+
+putconst_tail:
+                                                               /* set the field reference (s3) */
+                                                               if (iptr[1].flags.bits & INS_FLAG_UNRESOLVED) {
+                                                                       iptr->sx.s23.s3.uf = iptr[1].sx.s23.s3.uf;
+                                                                       iptr->flags.bits |= INS_FLAG_UNRESOLVED;
+                                                               }
+                                                               else {
+                                                                       iptr->sx.s23.s3.fmiref = iptr[1].sx.s23.s3.fmiref;
+                                                               }
+                                                               
+                                                               switch (iptr[1].opc) {
+                                                                       case ICMD_PUTSTATIC:
+                                                                               iptr->opc = ICMD_PUTSTATICCONST;
+                                                                               NEW_OP0_0;
+                                                                               break;
+                                                                       case ICMD_PUTFIELD:
+                                                                               iptr->opc = ICMD_PUTFIELDCONST;
+                                                                               NEW_OP1_0(TYPE_ADR);
+                                                                               break;
+                                                               }
+
+                                                               iptr[1].opc = ICMD_NOP;
+                                                               COUNT(count_pcmd_op);
                                                                break;
 #endif /* SUPPORT_CONST_STORE */
+
                                                        default:
-                                                               PUSHCONST(TYPE_INT);
-                                                       }
+                                                               goto normal_ICONST;
                                                }
-                                               else
-                                                       PUSHCONST(TYPE_INT);
+
+                                               /* if we get here, the ICONST has been optimized */
+                                               break;
+
+normal_ICONST:
+                                               /* normal case of an unoptimized ICONST */
+                                               NEW_OP0_1(TYPE_INT);
                                                break;
 
+       /************************** LCONST OPTIMIZATIONS **************************/
+
                                        case ICMD_LCONST:
                                                COUNT(count_pcmd_load);
-                                               if (len > 0) {
-                                                       switch (iptr[1].opc) {
+                                               if (len == 0)
+                                                       goto normal_LCONST;
+
+                                               /* switch depending on the following instruction */
+
+                                               switch (iptr[1].opc) {
 #if SUPPORT_LONG_ADD
                                                        case ICMD_LADD:
-                                                               iptr[0].opc = ICMD_LADDCONST;
+                                                               iptr->opc = ICMD_LADDCONST;
+                                                               /* FALLTHROUGH */
+
                                                        icmd_lconst_tail:
+                                                               /* instruction of type LONG -> LONG */
                                                                iptr[1].opc = ICMD_NOP;
-                                                               OP1_1(TYPE_LNG,TYPE_LNG);
+                                                               NEW_OP1_1(TYPE_LNG, TYPE_LNG);
                                                                COUNT(count_pcmd_op);
                                                                break;
+
                                                        case ICMD_LSUB:
-                                                               iptr[0].opc = ICMD_LSUBCONST;
+                                                               iptr->opc = ICMD_LSUBCONST;
                                                                goto icmd_lconst_tail;
+
 #endif /* SUPPORT_LONG_ADD */
 #if SUPPORT_LONG_MUL && SUPPORT_CONST_MUL
                                                        case ICMD_LMUL:
-                                                               iptr[0].opc = ICMD_LMULCONST;
+                                                               iptr->opc = ICMD_LMULCONST;
                                                                goto icmd_lconst_tail;
 #else /* SUPPORT_LONG_MUL && SUPPORT_CONST_MUL */
 # if SUPPORT_LONG_SHIFT
                                                        case ICMD_LMUL:
-                                                               if (iptr[0].val.l == 0x00000002)
-                                                                       iptr[0].val.i = 1;
-                                                               else if (iptr[0].val.l == 0x00000004)
-                                                                       iptr[0].val.i = 2;
-                                                               else if (iptr[0].val.l == 0x00000008)
-                                                                       iptr[0].val.i = 3;
-                                                               else if (iptr[0].val.l == 0x00000010)
-                                                                       iptr[0].val.i = 4;
-                                                               else if (iptr[0].val.l == 0x00000020)
-                                                                       iptr[0].val.i = 5;
-                                                               else if (iptr[0].val.l == 0x00000040)
-                                                                       iptr[0].val.i = 6;
-                                                               else if (iptr[0].val.l == 0x00000080)
-                                                                       iptr[0].val.i = 7;
-                                                               else if (iptr[0].val.l == 0x00000100)
-                                                                       iptr[0].val.i = 8;
-                                                               else if (iptr[0].val.l == 0x00000200)
-                                                                       iptr[0].val.i = 9;
-                                                               else if (iptr[0].val.l == 0x00000400)
-                                                                       iptr[0].val.i = 10;
-                                                               else if (iptr[0].val.l == 0x00000800)
-                                                                       iptr[0].val.i = 11;
-                                                               else if (iptr[0].val.l == 0x00001000)
-                                                                       iptr[0].val.i = 12;
-                                                               else if (iptr[0].val.l == 0x00002000)
-                                                                       iptr[0].val.i = 13;
-                                                               else if (iptr[0].val.l == 0x00004000)
-                                                                       iptr[0].val.i = 14;
-                                                               else if (iptr[0].val.l == 0x00008000)
-                                                                       iptr[0].val.i = 15;
-                                                               else if (iptr[0].val.l == 0x00010000)
-                                                                       iptr[0].val.i = 16;
-                                                               else if (iptr[0].val.l == 0x00020000)
-                                                                       iptr[0].val.i = 17;
-                                                               else if (iptr[0].val.l == 0x00040000)
-                                                                       iptr[0].val.i = 18;
-                                                               else if (iptr[0].val.l == 0x00080000)
-                                                                       iptr[0].val.i = 19;
-                                                               else if (iptr[0].val.l == 0x00100000)
-                                                                       iptr[0].val.i = 20;
-                                                               else if (iptr[0].val.l == 0x00200000)
-                                                                       iptr[0].val.i = 21;
-                                                               else if (iptr[0].val.l == 0x00400000)
-                                                                       iptr[0].val.i = 22;
-                                                               else if (iptr[0].val.l == 0x00800000)
-                                                                       iptr[0].val.i = 23;
-                                                               else if (iptr[0].val.l == 0x01000000)
-                                                                       iptr[0].val.i = 24;
-                                                               else if (iptr[0].val.l == 0x02000000)
-                                                                       iptr[0].val.i = 25;
-                                                               else if (iptr[0].val.l == 0x04000000)
-                                                                       iptr[0].val.i = 26;
-                                                               else if (iptr[0].val.l == 0x08000000)
-                                                                       iptr[0].val.i = 27;
-                                                               else if (iptr[0].val.l == 0x10000000)
-                                                                       iptr[0].val.i = 28;
-                                                               else if (iptr[0].val.l == 0x20000000)
-                                                                       iptr[0].val.i = 29;
-                                                               else if (iptr[0].val.l == 0x40000000)
-                                                                       iptr[0].val.i = 30;
-                                                               else if (iptr[0].val.l == 0x80000000)
-                                                                       iptr[0].val.i = 31;
+                                                               if (iptr->sx.val.l == 0x00000002)
+                                                                       iptr->sx.val.i = 1;
+                                                               else if (iptr->sx.val.l == 0x00000004)
+                                                                       iptr->sx.val.i = 2;
+                                                               else if (iptr->sx.val.l == 0x00000008)
+                                                                       iptr->sx.val.i = 3;
+                                                               else if (iptr->sx.val.l == 0x00000010)
+                                                                       iptr->sx.val.i = 4;
+                                                               else if (iptr->sx.val.l == 0x00000020)
+                                                                       iptr->sx.val.i = 5;
+                                                               else if (iptr->sx.val.l == 0x00000040)
+                                                                       iptr->sx.val.i = 6;
+                                                               else if (iptr->sx.val.l == 0x00000080)
+                                                                       iptr->sx.val.i = 7;
+                                                               else if (iptr->sx.val.l == 0x00000100)
+                                                                       iptr->sx.val.i = 8;
+                                                               else if (iptr->sx.val.l == 0x00000200)
+                                                                       iptr->sx.val.i = 9;
+                                                               else if (iptr->sx.val.l == 0x00000400)
+                                                                       iptr->sx.val.i = 10;
+                                                               else if (iptr->sx.val.l == 0x00000800)
+                                                                       iptr->sx.val.i = 11;
+                                                               else if (iptr->sx.val.l == 0x00001000)
+                                                                       iptr->sx.val.i = 12;
+                                                               else if (iptr->sx.val.l == 0x00002000)
+                                                                       iptr->sx.val.i = 13;
+                                                               else if (iptr->sx.val.l == 0x00004000)
+                                                                       iptr->sx.val.i = 14;
+                                                               else if (iptr->sx.val.l == 0x00008000)
+                                                                       iptr->sx.val.i = 15;
+                                                               else if (iptr->sx.val.l == 0x00010000)
+                                                                       iptr->sx.val.i = 16;
+                                                               else if (iptr->sx.val.l == 0x00020000)
+                                                                       iptr->sx.val.i = 17;
+                                                               else if (iptr->sx.val.l == 0x00040000)
+                                                                       iptr->sx.val.i = 18;
+                                                               else if (iptr->sx.val.l == 0x00080000)
+                                                                       iptr->sx.val.i = 19;
+                                                               else if (iptr->sx.val.l == 0x00100000)
+                                                                       iptr->sx.val.i = 20;
+                                                               else if (iptr->sx.val.l == 0x00200000)
+                                                                       iptr->sx.val.i = 21;
+                                                               else if (iptr->sx.val.l == 0x00400000)
+                                                                       iptr->sx.val.i = 22;
+                                                               else if (iptr->sx.val.l == 0x00800000)
+                                                                       iptr->sx.val.i = 23;
+                                                               else if (iptr->sx.val.l == 0x01000000)
+                                                                       iptr->sx.val.i = 24;
+                                                               else if (iptr->sx.val.l == 0x02000000)
+                                                                       iptr->sx.val.i = 25;
+                                                               else if (iptr->sx.val.l == 0x04000000)
+                                                                       iptr->sx.val.i = 26;
+                                                               else if (iptr->sx.val.l == 0x08000000)
+                                                                       iptr->sx.val.i = 27;
+                                                               else if (iptr->sx.val.l == 0x10000000)
+                                                                       iptr->sx.val.i = 28;
+                                                               else if (iptr->sx.val.l == 0x20000000)
+                                                                       iptr->sx.val.i = 29;
+                                                               else if (iptr->sx.val.l == 0x40000000)
+                                                                       iptr->sx.val.i = 30;
+                                                               else if (iptr->sx.val.l == 0x80000000)
+                                                                       iptr->sx.val.i = 31;
                                                                else {
-                                                                       PUSHCONST(TYPE_LNG);
-                                                                       break;
+                                                                       goto normal_LCONST;
                                                                }
-                                                               iptr[0].opc = ICMD_LMULPOW2;
+                                                               iptr->opc = ICMD_LMULPOW2;
                                                                goto icmd_lconst_tail;
 # endif /* SUPPORT_LONG_SHIFT */
 #endif /* SUPPORT_LONG_MUL && SUPPORT_CONST_MUL */
-#if SUPPORT_LONG_DIV
+#if SUPPORT_LONG_DIV_POW2
                                                        case ICMD_LDIV:
-                                                               if (iptr[0].val.l == 0x00000002)
-                                                                       iptr[0].val.i = 1;
-                                                               else if (iptr[0].val.l == 0x00000004)
-                                                                       iptr[0].val.i = 2;
-                                                               else if (iptr[0].val.l == 0x00000008)
-                                                                       iptr[0].val.i = 3;
-                                                               else if (iptr[0].val.l == 0x00000010)
-                                                                       iptr[0].val.i = 4;
-                                                               else if (iptr[0].val.l == 0x00000020)
-                                                                       iptr[0].val.i = 5;
-                                                               else if (iptr[0].val.l == 0x00000040)
-                                                                       iptr[0].val.i = 6;
-                                                               else if (iptr[0].val.l == 0x00000080)
-                                                                       iptr[0].val.i = 7;
-                                                               else if (iptr[0].val.l == 0x00000100)
-                                                                       iptr[0].val.i = 8;
-                                                               else if (iptr[0].val.l == 0x00000200)
-                                                                       iptr[0].val.i = 9;
-                                                               else if (iptr[0].val.l == 0x00000400)
-                                                                       iptr[0].val.i = 10;
-                                                               else if (iptr[0].val.l == 0x00000800)
-                                                                       iptr[0].val.i = 11;
-                                                               else if (iptr[0].val.l == 0x00001000)
-                                                                       iptr[0].val.i = 12;
-                                                               else if (iptr[0].val.l == 0x00002000)
-                                                                       iptr[0].val.i = 13;
-                                                               else if (iptr[0].val.l == 0x00004000)
-                                                                       iptr[0].val.i = 14;
-                                                               else if (iptr[0].val.l == 0x00008000)
-                                                                       iptr[0].val.i = 15;
-                                                               else if (iptr[0].val.l == 0x00010000)
-                                                                       iptr[0].val.i = 16;
-                                                               else if (iptr[0].val.l == 0x00020000)
-                                                                       iptr[0].val.i = 17;
-                                                               else if (iptr[0].val.l == 0x00040000)
-                                                                       iptr[0].val.i = 18;
-                                                               else if (iptr[0].val.l == 0x00080000)
-                                                                       iptr[0].val.i = 19;
-                                                               else if (iptr[0].val.l == 0x00100000)
-                                                                       iptr[0].val.i = 20;
-                                                               else if (iptr[0].val.l == 0x00200000)
-                                                                       iptr[0].val.i = 21;
-                                                               else if (iptr[0].val.l == 0x00400000)
-                                                                       iptr[0].val.i = 22;
-                                                               else if (iptr[0].val.l == 0x00800000)
-                                                                       iptr[0].val.i = 23;
-                                                               else if (iptr[0].val.l == 0x01000000)
-                                                                       iptr[0].val.i = 24;
-                                                               else if (iptr[0].val.l == 0x02000000)
-                                                                       iptr[0].val.i = 25;
-                                                               else if (iptr[0].val.l == 0x04000000)
-                                                                       iptr[0].val.i = 26;
-                                                               else if (iptr[0].val.l == 0x08000000)
-                                                                       iptr[0].val.i = 27;
-                                                               else if (iptr[0].val.l == 0x10000000)
-                                                                       iptr[0].val.i = 28;
-                                                               else if (iptr[0].val.l == 0x20000000)
-                                                                       iptr[0].val.i = 29;
-                                                               else if (iptr[0].val.l == 0x40000000)
-                                                                       iptr[0].val.i = 30;
-                                                               else if (iptr[0].val.l == 0x80000000)
-                                                                       iptr[0].val.i = 31;
+                                                               if (iptr->sx.val.l == 0x00000002)
+                                                                       iptr->sx.val.i = 1;
+                                                               else if (iptr->sx.val.l == 0x00000004)
+                                                                       iptr->sx.val.i = 2;
+                                                               else if (iptr->sx.val.l == 0x00000008)
+                                                                       iptr->sx.val.i = 3;
+                                                               else if (iptr->sx.val.l == 0x00000010)
+                                                                       iptr->sx.val.i = 4;
+                                                               else if (iptr->sx.val.l == 0x00000020)
+                                                                       iptr->sx.val.i = 5;
+                                                               else if (iptr->sx.val.l == 0x00000040)
+                                                                       iptr->sx.val.i = 6;
+                                                               else if (iptr->sx.val.l == 0x00000080)
+                                                                       iptr->sx.val.i = 7;
+                                                               else if (iptr->sx.val.l == 0x00000100)
+                                                                       iptr->sx.val.i = 8;
+                                                               else if (iptr->sx.val.l == 0x00000200)
+                                                                       iptr->sx.val.i = 9;
+                                                               else if (iptr->sx.val.l == 0x00000400)
+                                                                       iptr->sx.val.i = 10;
+                                                               else if (iptr->sx.val.l == 0x00000800)
+                                                                       iptr->sx.val.i = 11;
+                                                               else if (iptr->sx.val.l == 0x00001000)
+                                                                       iptr->sx.val.i = 12;
+                                                               else if (iptr->sx.val.l == 0x00002000)
+                                                                       iptr->sx.val.i = 13;
+                                                               else if (iptr->sx.val.l == 0x00004000)
+                                                                       iptr->sx.val.i = 14;
+                                                               else if (iptr->sx.val.l == 0x00008000)
+                                                                       iptr->sx.val.i = 15;
+                                                               else if (iptr->sx.val.l == 0x00010000)
+                                                                       iptr->sx.val.i = 16;
+                                                               else if (iptr->sx.val.l == 0x00020000)
+                                                                       iptr->sx.val.i = 17;
+                                                               else if (iptr->sx.val.l == 0x00040000)
+                                                                       iptr->sx.val.i = 18;
+                                                               else if (iptr->sx.val.l == 0x00080000)
+                                                                       iptr->sx.val.i = 19;
+                                                               else if (iptr->sx.val.l == 0x00100000)
+                                                                       iptr->sx.val.i = 20;
+                                                               else if (iptr->sx.val.l == 0x00200000)
+                                                                       iptr->sx.val.i = 21;
+                                                               else if (iptr->sx.val.l == 0x00400000)
+                                                                       iptr->sx.val.i = 22;
+                                                               else if (iptr->sx.val.l == 0x00800000)
+                                                                       iptr->sx.val.i = 23;
+                                                               else if (iptr->sx.val.l == 0x01000000)
+                                                                       iptr->sx.val.i = 24;
+                                                               else if (iptr->sx.val.l == 0x02000000)
+                                                                       iptr->sx.val.i = 25;
+                                                               else if (iptr->sx.val.l == 0x04000000)
+                                                                       iptr->sx.val.i = 26;
+                                                               else if (iptr->sx.val.l == 0x08000000)
+                                                                       iptr->sx.val.i = 27;
+                                                               else if (iptr->sx.val.l == 0x10000000)
+                                                                       iptr->sx.val.i = 28;
+                                                               else if (iptr->sx.val.l == 0x20000000)
+                                                                       iptr->sx.val.i = 29;
+                                                               else if (iptr->sx.val.l == 0x40000000)
+                                                                       iptr->sx.val.i = 30;
+                                                               else if (iptr->sx.val.l == 0x80000000)
+                                                                       iptr->sx.val.i = 31;
                                                                else {
-                                                                       PUSHCONST(TYPE_LNG);
-                                                                       break;
+                                                                       goto normal_LCONST;
                                                                }
-                                                               iptr[0].opc = ICMD_LDIVPOW2;
+                                                               iptr->opc = ICMD_LDIVPOW2;
                                                                goto icmd_lconst_tail;
+#endif /* SUPPORT_LONG_DIV_POW2 */
+
+#if SUPPORT_LONG_REM_POW2
                                                        case ICMD_LREM:
-                                                               if ((iptr[0].val.l == 0x00000002) ||
-                                                                       (iptr[0].val.l == 0x00000004) ||
-                                                                       (iptr[0].val.l == 0x00000008) ||
-                                                                       (iptr[0].val.l == 0x00000010) ||
-                                                                       (iptr[0].val.l == 0x00000020) ||
-                                                                       (iptr[0].val.l == 0x00000040) ||
-                                                                       (iptr[0].val.l == 0x00000080) ||
-                                                                       (iptr[0].val.l == 0x00000100) ||
-                                                                       (iptr[0].val.l == 0x00000200) ||
-                                                                       (iptr[0].val.l == 0x00000400) ||
-                                                                       (iptr[0].val.l == 0x00000800) ||
-                                                                       (iptr[0].val.l == 0x00001000) ||
-                                                                       (iptr[0].val.l == 0x00002000) ||
-                                                                       (iptr[0].val.l == 0x00004000) ||
-                                                                       (iptr[0].val.l == 0x00008000) ||
-                                                                       (iptr[0].val.l == 0x00010000) ||
-                                                                       (iptr[0].val.l == 0x00020000) ||
-                                                                       (iptr[0].val.l == 0x00040000) ||
-                                                                       (iptr[0].val.l == 0x00080000) ||
-                                                                       (iptr[0].val.l == 0x00100000) ||
-                                                                       (iptr[0].val.l == 0x00200000) ||
-                                                                       (iptr[0].val.l == 0x00400000) ||
-                                                                       (iptr[0].val.l == 0x00800000) ||
-                                                                       (iptr[0].val.l == 0x01000000) ||
-                                                                       (iptr[0].val.l == 0x02000000) ||
-                                                                       (iptr[0].val.l == 0x04000000) ||
-                                                                       (iptr[0].val.l == 0x08000000) ||
-                                                                       (iptr[0].val.l == 0x10000000) ||
-                                                                       (iptr[0].val.l == 0x20000000) ||
-                                                                       (iptr[0].val.l == 0x40000000) ||
-                                                                       (iptr[0].val.l == 0x80000000)) {
-                                                                       iptr[0].opc = ICMD_LREMPOW2;
-                                                                       iptr[0].val.l -= 1;
+                                                               if ((iptr->sx.val.l == 0x00000002) ||
+                                                                       (iptr->sx.val.l == 0x00000004) ||
+                                                                       (iptr->sx.val.l == 0x00000008) ||
+                                                                       (iptr->sx.val.l == 0x00000010) ||
+                                                                       (iptr->sx.val.l == 0x00000020) ||
+                                                                       (iptr->sx.val.l == 0x00000040) ||
+                                                                       (iptr->sx.val.l == 0x00000080) ||
+                                                                       (iptr->sx.val.l == 0x00000100) ||
+                                                                       (iptr->sx.val.l == 0x00000200) ||
+                                                                       (iptr->sx.val.l == 0x00000400) ||
+                                                                       (iptr->sx.val.l == 0x00000800) ||
+                                                                       (iptr->sx.val.l == 0x00001000) ||
+                                                                       (iptr->sx.val.l == 0x00002000) ||
+                                                                       (iptr->sx.val.l == 0x00004000) ||
+                                                                       (iptr->sx.val.l == 0x00008000) ||
+                                                                       (iptr->sx.val.l == 0x00010000) ||
+                                                                       (iptr->sx.val.l == 0x00020000) ||
+                                                                       (iptr->sx.val.l == 0x00040000) ||
+                                                                       (iptr->sx.val.l == 0x00080000) ||
+                                                                       (iptr->sx.val.l == 0x00100000) ||
+                                                                       (iptr->sx.val.l == 0x00200000) ||
+                                                                       (iptr->sx.val.l == 0x00400000) ||
+                                                                       (iptr->sx.val.l == 0x00800000) ||
+                                                                       (iptr->sx.val.l == 0x01000000) ||
+                                                                       (iptr->sx.val.l == 0x02000000) ||
+                                                                       (iptr->sx.val.l == 0x04000000) ||
+                                                                       (iptr->sx.val.l == 0x08000000) ||
+                                                                       (iptr->sx.val.l == 0x10000000) ||
+                                                                       (iptr->sx.val.l == 0x20000000) ||
+                                                                       (iptr->sx.val.l == 0x40000000) ||
+                                                                       (iptr->sx.val.l == 0x80000000))
+                                                               {
+                                                                       iptr->opc = ICMD_LREMPOW2;
+                                                                       iptr->sx.val.l -= 1;
                                                                        goto icmd_lconst_tail;
                                                                }
-                                                               PUSHCONST(TYPE_LNG);
-                                                               break;
-#endif /* SUPPORT_LONG_DIV */
+                                                               goto normal_LCONST;
+#endif /* SUPPORT_LONG_REM_POW2 */
+
 #if SUPPORT_LONG_LOGICAL && SUPPORT_CONST_LOGICAL
 
                                                        case ICMD_LAND:
-                                                               iptr[0].opc = ICMD_LANDCONST;
+                                                               iptr->opc = ICMD_LANDCONST;
                                                                goto icmd_lconst_tail;
+
                                                        case ICMD_LOR:
-                                                               iptr[0].opc = ICMD_LORCONST;
+                                                               iptr->opc = ICMD_LORCONST;
                                                                goto icmd_lconst_tail;
+
                                                        case ICMD_LXOR:
-                                                               iptr[0].opc = ICMD_LXORCONST;
+                                                               iptr->opc = ICMD_LXORCONST;
                                                                goto icmd_lconst_tail;
 #endif /* SUPPORT_LONG_LOGICAL && SUPPORT_CONST_LOGICAL */
 
 #if SUPPORT_LONG_CMP_CONST
                                                        case ICMD_LCMP:
-                                                               if ((len > 1) && (iptr[2].val.i == 0)) {
-                                                                       switch (iptr[2].opc) {
+                                                               if ((len <= 1) || (iptr[2].sx.val.i != 0))
+                                                                       goto normal_LCONST;
+
+                                                               /* switch on the instruction after LCONST - LCMP */
+
+                                                               switch (iptr[2].opc) {
                                                                        case ICMD_IFEQ:
-                                                                               iptr[0].opc = ICMD_IF_LEQ;
+                                                                               iptr->opc = ICMD_IF_LEQ;
+                                                                               /* FALLTHROUGH */
+
                                                                        icmd_lconst_lcmp_tail:
-                                                                               iptr[0].op1 = iptr[2].op1;
+                                                                               /* convert LCONST, LCMP, IFXX to IF_LXX */
+                                                                               iptr->dst.insindex = iptr[2].dst.insindex;
                                                                                iptr[1].opc = ICMD_NOP;
                                                                                iptr[2].opc = ICMD_NOP;
 
-/*                                                                             bptr->icount -= 2; */
-/*                                                                             len -= 2; */
-
-                                                                               OP1_0(TYPE_LNG);
-                                                                               tbptr = m->basicblocks +
-                                                                                       m->basicblockindex[iptr[0].op1];
-
-                                                                               iptr[0].target = (void *) tbptr;
-
-                                                                               MARKREACHED(tbptr, copy);
+                                                                               NEW_OP1_BRANCH(TYPE_LNG);
+                                                                               BRANCH(tbptr, copy);
                                                                                COUNT(count_pcmd_bra);
                                                                                COUNT(count_pcmd_op);
                                                                                break;
+
                                                                        case ICMD_IFNE:
-                                                                               iptr[0].opc = ICMD_IF_LNE;
+                                                                               iptr->opc = ICMD_IF_LNE;
                                                                                goto icmd_lconst_lcmp_tail;
+
                                                                        case ICMD_IFLT:
-                                                                               iptr[0].opc = ICMD_IF_LLT;
+                                                                               iptr->opc = ICMD_IF_LLT;
                                                                                goto icmd_lconst_lcmp_tail;
+
                                                                        case ICMD_IFGT:
-                                                                               iptr[0].opc = ICMD_IF_LGT;
+                                                                               iptr->opc = ICMD_IF_LGT;
                                                                                goto icmd_lconst_lcmp_tail;
+
                                                                        case ICMD_IFLE:
-                                                                               iptr[0].opc = ICMD_IF_LLE;
+                                                                               iptr->opc = ICMD_IF_LLE;
                                                                                goto icmd_lconst_lcmp_tail;
+
                                                                        case ICMD_IFGE:
-                                                                               iptr[0].opc = ICMD_IF_LGE;
+                                                                               iptr->opc = ICMD_IF_LGE;
                                                                                goto icmd_lconst_lcmp_tail;
+
                                                                        default:
-                                                                               PUSHCONST(TYPE_LNG);
-                                                                       } /* switch (iptr[2].opc) */
-                                                               } /* if (iptr[2].val.i == 0) */
-                                                               else
-                                                                       PUSHCONST(TYPE_LNG);
+                                                                               goto normal_LCONST;
+                                                               } /* end switch on opcode after LCONST - LCMP */
                                                                break;
 #endif /* SUPPORT_LONG_CMP_CONST */
 
 #if SUPPORT_CONST_STORE
                                                        case ICMD_LASTORE:
-# if defined(ENABLE_INTRP)
-                                                               if (!opt_intrp) {
-# endif
-# if SUPPORT_CONST_STORE_ZERO_ONLY
-                                                                       if (iptr[0].val.l == 0) {
-# endif /* SUPPORT_CONST_STORE_ZERO_ONLY */
-                                                                               iptr[0].opc = ICMD_LASTORECONST;
-                                                                               iptr[1].opc = ICMD_NOP;
-                                                                               OPTT2_0(TYPE_INT, TYPE_ADR);
-                                                                               COUNT(count_pcmd_op);
+                                                               IF_INTRP( goto normal_LCONST; )
 # if SUPPORT_CONST_STORE_ZERO_ONLY
-                                                                       } 
-                                                                       else
-                                                                               PUSHCONST(TYPE_LNG);
-# endif /* SUPPORT_CONST_STORE_ZERO_ONLY */
-# if defined(ENABLE_INTRP)
-                                                               } 
-                                                               else
-                                                                       PUSHCONST(TYPE_LNG);
+                                                               if (iptr->sx.val.l != 0)
+                                                                       goto normal_LCONST;
 # endif
+#if SIZEOF_VOID_P == 4
+                                                               /* the constant must fit into a ptrint */
+                                                               if (iptr->sx.val.l < -0x80000000L || iptr->sx.val.l >= 0x80000000L)
+                                                                       goto normal_LCONST;
+#endif
+                                                               /* move the constant to s3 */
+                                                               iptr->sx.s23.s3.constval = iptr->sx.val.l;
+
+                                                               iptr->opc = ICMD_LASTORECONST;
+                                                               NEW_OP2_0(TYPE_ADR, TYPE_INT);
+
+                                                               iptr[1].opc = ICMD_NOP;
+                                                               COUNT(count_pcmd_op);
                                                                break;
 
                                                        case ICMD_PUTSTATIC:
                                                        case ICMD_PUTFIELD:
-# if defined(ENABLE_INTRP)
-                                                               if (!opt_intrp) {
-# endif
-# if SUPPORT_CONST_STORE_ZERO_ONLY
-                                                                       if (iptr[0].val.l == 0) {
-# endif /* SUPPORT_CONST_STORE_ZERO_ONLY */
-                                                                               switch (iptr[1].opc) {
-                                                                               case ICMD_PUTSTATIC:
-                                                                                       iptr[0].opc = ICMD_PUTSTATICCONST;
-                                                                                       SETDST;
-                                                                                       break;
-                                                                               case ICMD_PUTFIELD:
-                                                                                       iptr[0].opc = ICMD_PUTFIELDCONST;
-                                                                                       OP1_0(TYPE_ADR);
-                                                                                       break;
-                                                                               }
-
-                                                                               iptr[1].opc = ICMD_NOP;
-                                                                               iptr[0].op1 = TYPE_LNG;
-                                                                               COUNT(count_pcmd_op);
+                                                               IF_INTRP( goto normal_LCONST; )
 # if SUPPORT_CONST_STORE_ZERO_ONLY
-                                                                       } 
-                                                                       else
-                                                                               PUSHCONST(TYPE_LNG);
-# endif /* SUPPORT_CONST_STORE_ZERO_ONLY */
-# if defined(ENABLE_INTRP)
-                                                               } 
-                                                               else
-                                                                       PUSHCONST(TYPE_LNG);
+                                                               if (iptr->sx.val.l != 0)
+                                                                       goto normal_LCONST;
 # endif
-                                                               break;
+#if SIZEOF_VOID_P == 4
+                                                               /* the constant must fit into a ptrint */
+                                                               if (iptr->sx.val.l < -0x80000000L || iptr->sx.val.l >= 0x80000000L)
+                                                                       goto normal_LCONST;
+#endif
+                                                               /* XXX check field type? */
+
+                                                               /* copy the constant to s2 */
+                                                               /* XXX constval -> fieldconstval? */
+                                                               iptr->sx.s23.s2.constval = iptr->sx.val.l;
+
+                                                               goto putconst_tail;
+
 #endif /* SUPPORT_CONST_STORE */
+
                                                        default:
-                                                               PUSHCONST(TYPE_LNG);
-                                                       }
-                                               }
-                                               else
-                                                       PUSHCONST(TYPE_LNG);
+                                                               goto normal_LCONST;
+                                               } /* end switch opcode after LCONST */
+
+                                               /* if we get here, the LCONST has been optimized */
+                                               break;
+
+normal_LCONST:
+                                               /* the normal case of an unoptimized LCONST */
+                                               NEW_OP0_1(TYPE_LNG);
                                                break;
 
+       /************************ END OF LCONST OPTIMIZATIONS *********************/
+
                                        case ICMD_FCONST:
                                                COUNT(count_pcmd_load);
-                                               PUSHCONST(TYPE_FLT);
+                                               NEW_OP0_1(TYPE_FLT);
                                                break;
 
                                        case ICMD_DCONST:
                                                COUNT(count_pcmd_load);
-                                               PUSHCONST(TYPE_DBL);
+                                               NEW_OP0_1(TYPE_DBL);
                                                break;
 
+       /************************** ACONST OPTIMIZATIONS **************************/
+
                                        case ICMD_ACONST:
                                                COUNT(count_pcmd_load);
 #if SUPPORT_CONST_STORE
-# if defined(ENABLE_INTRP)
-                                               if (!opt_intrp) {
-# endif
-                                                       if ((len > 0) && ((iptr->target == NULL) &&
-                                                                                         (iptr->val.a == NULL))) {
-                                                               switch (iptr[1].opc) {
-                                                               case ICMD_AASTORE:
-                                                                       iptr[0].opc = ICMD_AASTORECONST;
-                                                                       OPTT2_0(TYPE_INT, TYPE_ADR);
+                                               IF_INTRP( goto normal_ACONST; )
 
-                                                                       iptr[1].opc = ICMD_NOP;
-                                                                       COUNT(count_pcmd_op);
-                                                                       break;
+                                               /* We can only optimize if the ACONST is resolved
+                                                * and there is an instruction after it. */
 
-                                                               default:
-                                                                       PUSHCONST(TYPE_ADR);
-                                                               }
+                                               if ((len == 0) || (iptr->flags.bits & INS_FLAG_UNRESOLVED))
+                                                       goto normal_ACONST;
 
-                                                       }
-                                                       else if ((len > 0) && ((iptr->target == NULL) ||
-                                                                                                  (iptr->val.a != NULL))) {
-                                                               switch (iptr[1].opc) {
-                                                               case ICMD_PUTSTATIC:
-                                                               case ICMD_PUTFIELD:
-                                                                       switch (iptr[1].opc) {
-                                                                       case ICMD_PUTSTATIC:
-                                                                               iptr[0].opc = ICMD_PUTSTATICCONST;
-                                                                               iptr[0].op1 = TYPE_ADR;
-                                                                               SETDST;
-                                                                               break;
-                                                                       case ICMD_PUTFIELD:
-                                                                               iptr[0].opc = ICMD_PUTFIELDCONST;
-                                                                               iptr[0].op1 = TYPE_ADR;
-                                                                               OP1_0(TYPE_ADR);
-                                                                               break;
-                                                                       }
+                                               switch (iptr[1].opc) {
+                                                       case ICMD_AASTORE:
+                                                               /* We can only optimize for NULL values
+                                                                * here because otherwise a checkcast is
+                                                                * required. */
+                                                               if (iptr->sx.val.anyptr != NULL)
+                                                                       goto normal_ACONST;
 
-                                                                       iptr[1].opc = ICMD_NOP;
-                                                                       COUNT(count_pcmd_op);
-                                                                       break;
+                                                               /* copy the constant (NULL) to s3 */
+                                                               iptr->sx.s23.s3.constval = 0;
+                                                               iptr->opc = ICMD_AASTORECONST;
+                                                               NEW_OP2_0(TYPE_ADR, TYPE_INT);
 
-                                                               default:
-                                                                       PUSHCONST(TYPE_ADR);
-                                                               }
+                                                               iptr[1].opc = ICMD_NOP;
+                                                               COUNT(count_pcmd_op);
+                                                               break;
 
-                                                       }
-                                                       else
-                                                               PUSHCONST(TYPE_ADR);
-# if defined(ENABLE_INTRP)
-                                               } 
-                                               else
-                                                       PUSHCONST(TYPE_ADR);
-# endif
-#else /* SUPPORT_CONST_STORE */
-                                               PUSHCONST(TYPE_ADR);
+                                                       case ICMD_PUTSTATIC:
+                                                       case ICMD_PUTFIELD:
+# if SUPPORT_CONST_STORE_ZERO_ONLY
+                                                               if (iptr->sx.val.anyptr != NULL)
+                                                                       goto normal_ACONST;
+# endif
+                                                               /* XXX check field type? */
+                                                               /* copy the constant to s2 */
+                                                               /* XXX constval -> fieldconstval? */
+                                                               iptr->sx.s23.s2.constval = (ptrint) iptr->sx.val.anyptr;
+
+                                                               goto putconst_tail;
+
+                                                       default:
+                                                               goto normal_ACONST;
+                                               }
+
+                                               /* if we get here the ACONST has been optimized */
+                                               break;
+
+normal_ACONST:
 #endif /* SUPPORT_CONST_STORE */
+                                               NEW_OP0_1(TYPE_ADR);
                                                break;
 
+
                                                /* pop 0 push 1 load */
-                                               
+
                                        case ICMD_ILOAD:
                                        case ICMD_LLOAD:
                                        case ICMD_FLOAD:
@@ -1119,62 +1443,53 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_ALOAD:
                                                COUNT(count_load_instruction);
                                                i = opcode - ICMD_ILOAD;
-#if defined(ENABLE_INTRP)
-                                               if (!opt_intrp)
-#endif
-                                                       rd->locals[iptr->op1][i].type = i;
-                                               LOAD(i, LOCALVAR, iptr->op1);
+                                               IF_NO_INTRP( rd->locals[iptr->s1.localindex][i].type = i; )
+                                               NEW_LOAD(i, iptr->s1.localindex);
                                                break;
 
                                                /* pop 2 push 1 */
 
                                        case ICMD_LALOAD:
-                                       case ICMD_IALOAD:
                                        case ICMD_FALOAD:
                                        case ICMD_DALOAD:
                                        case ICMD_AALOAD:
                                                COUNT(count_check_null);
                                                COUNT(count_check_bound);
                                                COUNT(count_pcmd_mem);
-                                               OP2IAT_1(opcode - ICMD_IALOAD);
+                                               NEW_OP2_1(TYPE_ADR, TYPE_INT, opcode - ICMD_IALOAD);
                                                break;
 
+                                       case ICMD_IALOAD:
                                        case ICMD_BALOAD:
                                        case ICMD_CALOAD:
                                        case ICMD_SALOAD:
                                                COUNT(count_check_null);
                                                COUNT(count_check_bound);
                                                COUNT(count_pcmd_mem);
-                                               OP2IAT_1(TYPE_INT);
+                                               NEW_OP2_1(TYPE_ADR, TYPE_INT, TYPE_INT);
                                                break;
 
                                                /* pop 0 push 0 iinc */
 
                                        case ICMD_IINC:
-#if defined(ENABLE_STATISTICS)
-                                               if (opt_stat) {
-                                                       i = stackdepth;
-                                                       if (i >= 10)
-                                                               count_store_depth[10]++;
-                                                       else
-                                                               count_store_depth[i]++;
-                                               }
-#endif
-                                               last_store[5 * iptr->op1 + TYPE_INT] = bptr->icount - len - 1;
+                                               STATISTICS_STACKDEPTH_DISTRIBUTION(count_store_depth);
+
+                                               last_store[5 * iptr->s1.localindex + TYPE_INT] = bptr->icount - len - 1;
 
                                                copy = curstack;
                                                i = stackdepth - 1;
                                                while (copy) {
                                                        if ((copy->varkind == LOCALVAR) &&
-                                                               (copy->varnum == iptr->op1)) {
+                                                               (copy->varnum == iptr->s1.localindex))
+                                                       {
                                                                copy->varkind = TEMPVAR;
                                                                copy->varnum = i;
                                                        }
                                                        i--;
                                                        copy = copy->prev;
                                                }
-                                               
-                                               SETDST;
+
+                                               iptr->dst.localindex = iptr->s1.localindex;
                                                break;
 
                                                /* pop 1 push 0 store */
@@ -1186,146 +1501,49 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_ASTORE:
                                                REQUIRE_1;
 
-                                       i = opcode - ICMD_ISTORE;
-#if defined(ENABLE_INTRP)
-                                               if (!opt_intrp)
-#endif
-                                                       rd->locals[iptr->op1][i].type = i;
+                                               i = opcode - ICMD_ISTORE; /* type */
+                                               IF_NO_INTRP( rd->locals[iptr->dst.localindex][i].type = i; )
+
 #if defined(ENABLE_STATISTICS)
-                                       if (opt_stat) {
-                                               count_pcmd_store++;
-                                               i = new - curstack;
-                                               if (i >= 20)
-                                                       count_store_length[20]++;
-                                               else
-                                                       count_store_length[i]++;
-                                               i = stackdepth - 1;
-                                               if (i >= 10)
-                                                       count_store_depth[10]++;
-                                               else
-                                                       count_store_depth[i]++;
-                                       }
-#endif
-                                       /* check for conflicts as described in Figure 5.2 */
-                                       copy = curstack->prev;
-                                       i = stackdepth - 2;
-                                       while (copy) {
-                                               if ((copy->varkind == LOCALVAR) &&
-                                                       (copy->varnum == iptr->op1)) {
-                                                       copy->varkind = TEMPVAR;
-                                                       copy->varnum = i;
+                                               if (opt_stat) {
+                                                       count_pcmd_store++;
+                                                       i = new - curstack;
+                                                       if (i >= 20)
+                                                               count_store_length[20]++;
+                                                       else
+                                                               count_store_length[i]++;
+                                                       i = stackdepth - 1;
+                                                       if (i >= 10)
+                                                               count_store_depth[10]++;
+                                                       else
+                                                               count_store_depth[i]++;
                                                }
-                                               i--;
-                                               copy = copy->prev;
-                                       }
-
-                                       /* do not change instack Stackslots */
-                                       /* it won't improve performance if we copy the interface */
-                                       /* at the BB begin or here, and lsra relies that no      */
-                                       /* instack stackslot is marked LOCALVAR */
-                                       if (curstack->varkind == STACKVAR)
-                                               goto _possible_conflict;
-
-                                       /* check for a DUPX,SWAP while the lifetime of curstack */
-                                       /* and as creator curstack */
-                                       if (last_dupx != -1) { 
-                                               /* we have to look at the dst stack of DUPX */
-                                               /* == src Stack of PEI */
-                                               copy = bptr->iinstr[last_dupx].dst;
-                                               /*
-                                               if (last_pei == 0)
-                                                       copy = bptr->instack;
-                                               else
-                                                       copy = bptr->iinstr[last_pei-1].dst;
-                                               */
-                                               if ((copy != NULL) && (curstack <= copy)) {
-                                                       /* curstack alive at or created by DUPX */
-
-                                                       /* TODO:.... */
-                                                       /* now look, if there is a LOCALVAR at anyone of */
-                                                       /* the src stacklots used by DUPX */
-
-                                                       goto _possible_conflict;
+#endif
+                                               /* check for conflicts as described in Figure 5.2 */
+                                               copy = curstack->prev;
+                                               i = stackdepth - 2;
+                                               while (copy) {
+                                                       if ((copy->varkind == LOCALVAR) &&
+                                                               (copy->varnum == iptr->dst.localindex))
+                                                       {
+                                                               copy->varkind = TEMPVAR;
+                                                               copy->varnum = i;
+                                                       }
+                                                       i--;
+                                                       copy = copy->prev;
                                                }
-                                       }
-
-                                       /* check for a PEI while the lifetime of curstack */
-                                       if (last_pei != -1) { 
-                                               /* && there are exception handler in this method */
-                                               /* when this is checked prevent ARGVAR from      */
-                                               /* overwriting LOCALVAR!!! */
 
-                                               /* we have to look at the stack _before_ the PEI! */
-                                               /* == src Stack of PEI */
-                                               if (last_pei == 0)
-                                                       copy = bptr->instack;
-                                               else
-                                                       copy = bptr->iinstr[last_pei-1].dst;
-                                               if ((copy != NULL) && (curstack <= copy)) {
-                                                       /* curstack alive at PEI */
-                                                       goto _possible_conflict;
-                                               }
-                                       }
-                                       
-                                       /* check if there is a possible conflicting XSTORE */
-                                       if (last_store[5 * iptr->op1 + opcode - ICMD_ISTORE] != -1) {
-                                               /* we have to look at the stack _before_ the XSTORE! */
-                                               /* == src Stack of XSTORE */
-                                               if (last_store[5 * iptr->op1 + opcode - ICMD_ISTORE] == 0)
-                                                       copy = bptr->instack;
-                                               else
-                                                       copy = bptr->iinstr[last_store[5 * iptr->op1 + opcode - ICMD_ISTORE] - 1].dst;
-                                               if ((copy != NULL) && (curstack <= copy)) {
-                                                       /* curstack alive at Last Store */
-                                                       goto _possible_conflict;
+                                               if ((curstack->varkind == LOCALVAR)
+                                                       && (curstack->varnum == iptr->dst.localindex))
+                                               {
+                                                       curstack->varkind = TEMPVAR;
+                                                       curstack->varnum = stackdepth-1;
                                                }
-                                       }
 
-                                       /* check if there is a conflict with a XLOAD */
-                                       /* this is done indirectly by looking if a Stackslot is */
-                                       /* marked LOCALVAR and is live while curstack is live   */
-                                       /* see figure 5.3 */
-
-                                       /* First check "above" stackslots of the instack */
-                                       copy = curstack + 1;
-                                       for(;(copy <= bptr->instack); copy++)
-                                               if ((copy->varkind == LOCALVAR) && (copy->varnum == iptr->op1)) {
-                                                       goto _possible_conflict;
-                                               }
-                                       
-                                       /* "intra" Basic Block Stackslots are allocated above    */
-                                       /* bptr->stack (see doc/stack.txt), so if curstack + 1   */
-                                       /* is an instack, copy could point now to the stackslots */
-                                       /* of an inbetween analysed Basic Block */
-                                       if (copy < bptr->stack)
-                                               copy = bptr->stack;
-                                       while (copy < new) {
-                                               if ((copy->varkind == LOCALVAR) && (copy->varnum == iptr->op1)) {
-                                                       goto _possible_conflict;
-                                               }
-                                               copy++;
-                                       }
-                                       /* If Stackslot is already marked as LOCALVAR, do not    */
-                                       /* change it! Conflict resolution works only, if xLOAD   */
-                                       /* has priority! */
-                                       if (curstack->varkind == LOCALVAR)
-                                               goto _possible_conflict;
-                                       /* no conflict - mark the Stackslot as LOCALVAR */
-                                       curstack->varkind = LOCALVAR;
-                                       curstack->varnum = iptr->op1;
-                                       
-                                       goto _local_join;
-                               _possible_conflict:
-                                       if ((curstack->varkind == LOCALVAR) 
-                                               && (curstack->varnum == iptr->op1)) {
-                                               curstack->varkind = TEMPVAR;
-                                               curstack->varnum = stackdepth-1;
-                                       }
-                               _local_join:
-                                       last_store[5 * iptr->op1 + opcode - ICMD_ISTORE] = bptr->icount - len - 1;
+                                               last_store[5 * iptr->dst.localindex + (opcode - ICMD_ISTORE)] = bptr->icount - len - 1;
 
-                                       STORE(opcode - ICMD_ISTORE);
-                                       break;
+                                               NEW_STORE(opcode - ICMD_ISTORE, iptr->dst.localindex);
+                                               break;
 
                                        /* pop 3 push 0 */
 
@@ -1341,6 +1559,7 @@ bool stack_analyse(jitdata *jd)
                                                        rd->memuse = md->memuse;
                                                if (md->argintreguse > rd->argintreguse)
                                                        rd->argintreguse = md->argintreguse;
+                                               /* XXX non-leaf method? */
 
                                                /* make all stack variables saved */
 
@@ -1350,26 +1569,27 @@ bool stack_analyse(jitdata *jd)
                                                        copy = copy->prev;
                                                }
 
-                                               OP3TIA_0(TYPE_ADR);
+                                               NEW_OP3_0(TYPE_ADR, TYPE_INT, TYPE_ADR);
                                                break;
 
-                                       case ICMD_IASTORE:
+
                                        case ICMD_LASTORE:
                                        case ICMD_FASTORE:
                                        case ICMD_DASTORE:
                                                COUNT(count_check_null);
                                                COUNT(count_check_bound);
                                                COUNT(count_pcmd_mem);
-                                               OP3TIA_0(opcode - ICMD_IASTORE);
+                                               NEW_OP3_0(TYPE_ADR, TYPE_INT, opcode - ICMD_IASTORE);
                                                break;
 
+                                       case ICMD_IASTORE:
                                        case ICMD_BASTORE:
                                        case ICMD_CASTORE:
                                        case ICMD_SASTORE:
                                                COUNT(count_check_null);
                                                COUNT(count_check_bound);
                                                COUNT(count_pcmd_mem);
-                                               OP3TIA_0(TYPE_INT);
+                                               NEW_OP3_0(TYPE_ADR, TYPE_INT, TYPE_INT);
                                                break;
 
                                                /* pop 1 push 0 */
@@ -1382,7 +1602,7 @@ bool stack_analyse(jitdata *jd)
                                                                goto throw_stack_category_error;
                                                }
 #endif
-                                               OP1_0ANY;
+                                               NEW_OP1_0_ANY;
                                                break;
 
                                        case ICMD_IRETURN:
@@ -1390,29 +1610,23 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_FRETURN:
                                        case ICMD_DRETURN:
                                        case ICMD_ARETURN:
-#if defined(ENABLE_JIT)
-# if defined(ENABLE_INTRP)
-                                               if (!opt_intrp)
-# endif
-                                                       md_return_alloc(m, rd, opcode - ICMD_IRETURN,
-                                                                                       curstack);
-#endif
+                                               IF_JIT( md_return_alloc(jd, curstack); )
                                                COUNT(count_pcmd_return);
-                                               OP1_0(opcode - ICMD_IRETURN);
+                                               NEW_OP1_0(opcode - ICMD_IRETURN);
                                                superblockend = true;
                                                break;
 
                                        case ICMD_ATHROW:
                                                COUNT(count_check_null);
-                                               OP1_0(TYPE_ADR);
+                                               NEW_OP1_0(TYPE_ADR);
                                                STACKRESET;
-                                               SETDST;
                                                superblockend = true;
                                                break;
 
                                        case ICMD_PUTSTATIC:
                                                COUNT(count_pcmd_mem);
-                                               OP1_0(iptr->op1);
+                                               NEW_INSTRUCTION_GET_FIELDREF(iptr, fmiref);
+                                               NEW_OP1_0(fmiref->parseddesc.fd->type);
                                                break;
 
                                                /* pop 1 push 0 branch */
@@ -1420,12 +1634,8 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_IFNULL:
                                        case ICMD_IFNONNULL:
                                                COUNT(count_pcmd_bra);
-                                               OP1_0(TYPE_ADR);
-                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
-
-                                               iptr[0].target = (void *) tbptr;
-
-                                               MARKREACHED(tbptr, copy);
+                                               NEW_OP1_BRANCH(TYPE_ADR);
+                                               BRANCH(tbptr, copy);
                                                break;
 
                                        case ICMD_IFEQ:
@@ -1435,106 +1645,21 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_IFGT:
                                        case ICMD_IFLE:
                                                COUNT(count_pcmd_bra);
-#if CONDITIONAL_LOADCONST && 0
-# if defined(ENABLE_INTRP)
-                                               if (!opt_intrp) {
-# endif
-                                                       tbptr = m->basicblocks + b_index;
-
-                                                       if ((b_count >= 3) &&
-                                                               ((b_index + 2) == m->basicblockindex[iptr[0].op1]) &&
-                                                               (tbptr[1].pre_count == 1) &&
-                                                               (tbptr[1].iinstr[0].opc == ICMD_ICONST) &&
-                                                               (tbptr[1].iinstr[1].opc == ICMD_GOTO)   &&
-                                                               ((b_index + 3) == m->basicblockindex[tbptr[1].iinstr[1].op1]) &&
-                                                               (tbptr[2].pre_count == 1) &&
-                                                               (tbptr[2].iinstr[0].opc == ICMD_ICONST)  &&
-                                                               (tbptr[2].icount==1)) {
-                                                               /*printf("tbptr[2].icount=%d\n",tbptr[2].icount);*/
-                                                               OP1_1(TYPE_INT, TYPE_INT);
-                                                               switch (iptr[0].opc) {
-                                                               case ICMD_IFEQ:
-                                                                       iptr[0].opc = ICMD_IFNE_ICONST;
-                                                                       break;
-                                                               case ICMD_IFNE:
-                                                                       iptr[0].opc = ICMD_IFEQ_ICONST;
-                                                                       break;
-                                                               case ICMD_IFLT:
-                                                                       iptr[0].opc = ICMD_IFGE_ICONST;
-                                                                       break;
-                                                               case ICMD_IFGE:
-                                                                       iptr[0].opc = ICMD_IFLT_ICONST;
-                                                                       break;
-                                                               case ICMD_IFGT:
-                                                                       iptr[0].opc = ICMD_IFLE_ICONST;
-                                                                       break;
-                                                               case ICMD_IFLE:
-                                                                       iptr[0].opc = ICMD_IFGT_ICONST;
-                                                                       break;
-                                                               }
-#if 1
-                                                               iptr[0].val.i = iptr[1].val.i;
-                                                               iptr[1].opc = ICMD_ELSE_ICONST;
-                                                               iptr[1].val.i = iptr[3].val.i;
-                                                               iptr[2].opc = ICMD_NOP;
-                                                               iptr[3].opc = ICMD_NOP;
-#else
-                                                               /* HACK: save compare value in iptr[1].op1 */    
-                                                               iptr[1].op1 = iptr[0].val.i;     
-                                                               iptr[0].val.i = tbptr[1].iinstr[0].val.i;        
-                                                               iptr[1].opc = ICMD_ELSE_ICONST;          
-                                                               iptr[1].val.i = tbptr[2].iinstr[0].val.i;        
-                                                               tbptr[1].iinstr[0].opc = ICMD_NOP;       
-                                                               tbptr[1].iinstr[1].opc = ICMD_NOP;       
-                                                               tbptr[2].iinstr[0].opc = ICMD_NOP;       
-#endif
-                                                               tbptr[1].flags = BBDELETED;
-                                                               tbptr[2].flags = BBDELETED;
-                                                               tbptr[1].icount = 0;
-                                                               tbptr[2].icount = 0;
-                                                               if (tbptr[3].pre_count == 2) {
-                                                                       len += tbptr[3].icount + 3;
-                                                                       bptr->icount += tbptr[3].icount + 3;
-                                                                       tbptr[3].flags = BBDELETED;
-                                                                       tbptr[3].icount = 0;
-                                                                       b_index++;
-                                                               }
-                                                               else {
-                                                                       bptr->icount++;
-                                                                       len ++;
-                                                               }
-                                                               b_index += 2;
-                                                               break;
-                                                       }
-# if defined(ENABLE_INTRP)
-                                               }
-# endif
-
-#endif /* CONDITIONAL_LOADCONST */
-
-                                               /* iptr->val.i is set implicitly in parse by
+                                               /* iptr->sx.val.i is set implicitly in parse by
                                                   clearing the memory or from IF_ICMPxx
                                                   optimization. */
 
-                                               OP1_0(TYPE_INT);
-/*                                             iptr->val.i = 0; */
-                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
-
-                                               iptr[0].target = (void *) tbptr;
-
-                                               MARKREACHED(tbptr, copy);
+                                               NEW_OP1_BRANCH(TYPE_INT);
+/*                                             iptr->sx.val.i = 0; */
+                                               BRANCH(tbptr, copy);
                                                break;
 
                                                /* pop 0 push 0 branch */
 
                                        case ICMD_GOTO:
                                                COUNT(count_pcmd_bra);
-                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
-
-                                               iptr[0].target = (void *) tbptr;
-
-                                               MARKREACHED(tbptr, copy);
-                                               SETDST;
+                                               NEW_OP0_BRANCH;
+                                               BRANCH(tbptr, copy);
                                                superblockend = true;
                                                break;
 
@@ -1542,64 +1667,45 @@ bool stack_analyse(jitdata *jd)
 
                                        case ICMD_TABLESWITCH:
                                                COUNT(count_pcmd_table);
-                                               OP1_0(TYPE_INT);
-                                               s4ptr = iptr->val.a;
-                                               tbptr = m->basicblocks + m->basicblockindex[*s4ptr++];
-                                               MARKREACHED(tbptr, copy);
-                                               i = *s4ptr++;                          /* low     */
-                                               i = *s4ptr++ - i + 1;                  /* high    */
+                                               NEW_OP1_BRANCH(TYPE_INT);
 
-                                               tptr = DMNEW(void*, i+1);
-                                               iptr->target = (void *) tptr;
+                                               table = iptr->dst.table;
+                                               BRANCH_TARGET(*table, tbptr, copy);
+                                               table++;
 
-                                               tptr[0] = (void *) tbptr;
-                                               tptr++;
+                                               i = iptr->sx.s23.s3.tablehigh
+                                                 - iptr->sx.s23.s2.tablelow + 1;
 
                                                while (--i >= 0) {
-                                                       tbptr = m->basicblocks + m->basicblockindex[*s4ptr++];
-
-                                                       tptr[0] = (void *) tbptr;
-                                                       tptr++;
-
-                                                       MARKREACHED(tbptr, copy);
+                                                       BRANCH_TARGET(*table, tbptr, copy);
+                                                       table++;
                                                }
-                                               SETDST;
                                                superblockend = true;
                                                break;
-                                                       
+
                                                /* pop 1 push 0 table branch */
 
                                        case ICMD_LOOKUPSWITCH:
                                                COUNT(count_pcmd_table);
-                                               OP1_0(TYPE_INT);
-                                               s4ptr = iptr->val.a;
-                                               tbptr = m->basicblocks + m->basicblockindex[*s4ptr++];
-                                               MARKREACHED(tbptr, copy);
-                                               i = *s4ptr++;                          /* count   */
+                                               NEW_OP1_BRANCH(TYPE_INT);
 
-                                               tptr = DMNEW(void*, i+1);
-                                               iptr->target = (void *) tptr;
+                                               BRANCH_TARGET(iptr->sx.s23.s3.lookupdefault, tbptr, copy);
 
-                                               tptr[0] = (void *) tbptr;
-                                               tptr++;
+                                               lookup = iptr->dst.lookup;
 
-                                               while (--i >= 0) {
-                                                       tbptr = m->basicblocks + m->basicblockindex[s4ptr[1]];
+                                               i = iptr->sx.s23.s2.lookupcount;
 
-                                                       tptr[0] = (void *) tbptr;
-                                                       tptr++;
-                                                               
-                                                       MARKREACHED(tbptr, copy);
-                                                       s4ptr += 2;
+                                               while (--i >= 0) {
+                                                       BRANCH_TARGET(lookup->target, tbptr, copy);
+                                                       lookup++;
                                                }
-                                               SETDST;
                                                superblockend = true;
                                                break;
 
                                        case ICMD_MONITORENTER:
-                                               COUNT(count_check_null);
                                        case ICMD_MONITOREXIT:
-                                               OP1_0(TYPE_ADR);
+                                               COUNT(count_check_null);
+                                               NEW_OP1_0(TYPE_ADR);
                                                break;
 
                                                /* pop 2 push 0 branch */
@@ -1611,23 +1717,15 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_IF_ICMPGT:
                                        case ICMD_IF_ICMPLE:
                                                COUNT(count_pcmd_bra);
-                                               OP2_0(TYPE_INT);
-                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
-                                                       
-                                               iptr[0].target = (void *) tbptr;
-
-                                               MARKREACHED(tbptr, copy);
+                                               NEW_OP2_BRANCH(TYPE_INT, TYPE_INT);
+                                               BRANCH(tbptr, copy);
                                                break;
 
                                        case ICMD_IF_ACMPEQ:
                                        case ICMD_IF_ACMPNE:
                                                COUNT(count_pcmd_bra);
-                                               OP2_0(TYPE_ADR);
-                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
-
-                                               iptr[0].target = (void *) tbptr;
-
-                                               MARKREACHED(tbptr, copy);
+                                               NEW_OP2_BRANCH(TYPE_ADR, TYPE_ADR);
+                                               BRANCH(tbptr, copy);
                                                break;
 
                                                /* pop 2 push 0 */
@@ -1635,7 +1733,8 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_PUTFIELD:
                                                COUNT(count_check_null);
                                                COUNT(count_pcmd_mem);
-                                               OPTT2_0(iptr->op1,TYPE_ADR);
+                                               NEW_INSTRUCTION_GET_FIELDREF(iptr, fmiref);
+                                               NEW_OP2_0(TYPE_ADR, fmiref->parseddesc.fd->type);
                                                break;
 
                                        case ICMD_POP2:
@@ -1649,26 +1748,32 @@ bool stack_analyse(jitdata *jd)
                                                                        goto throw_stack_category_error;
                                                        }
 #endif
-                                                       OP1_0ANY;                /* second pop */
+                                                       NEW_OP2_0_ANY_ANY; /* pop two slots */
                                                }
-                                               else
+                                               else {
                                                        iptr->opc = ICMD_POP;
-                                               OP1_0ANY;
+                                                       NEW_OP1_0_ANY; /* pop one (two-word) slot */
+                                               }
                                                break;
 
                                                /* pop 0 push 1 dup */
-                                               
+
                                        case ICMD_DUP:
 #ifdef ENABLE_VERIFIER
                                                if (opt_verify) {
                                                        REQUIRE_1;
                                                        if (IS_2_WORD_TYPE(curstack->type))
-                                                               goto throw_stack_category_error;
+                                                               goto throw_stack_category_error;
                                                }
 #endif
                                                last_dupx = bptr->icount - len - 1;
                                                COUNT(count_dup_instruction);
-                                               DUP;
+
+icmd_DUP:
+                                               USE_S1_ANY; /* XXX live through */
+                                               DUP_SLOT(iptr->s1.var);
+                                               iptr->dst.var = curstack;
+                                               stackdepth++;
                                                break;
 
                                        case ICMD_DUP2:
@@ -1677,7 +1782,7 @@ bool stack_analyse(jitdata *jd)
                                                if (IS_2_WORD_TYPE(curstack->type)) {
                                                        /* ..., cat2 */
                                                        iptr->opc = ICMD_DUP;
-                                                       DUP;
+                                                       goto icmd_DUP;
                                                }
                                                else {
                                                        REQUIRE_2;
@@ -1685,32 +1790,47 @@ bool stack_analyse(jitdata *jd)
 #ifdef ENABLE_VERIFIER
                                                        if (opt_verify) {
                                                                if (IS_2_WORD_TYPE(curstack->prev->type))
-                                                                       goto throw_stack_category_error;
+                                                                       goto throw_stack_category_error;
                                                        }
 #endif
-                                                       copy = curstack;
-                                                       NEWSTACK(copy->prev->type, copy->prev->varkind,
-                                                                        copy->prev->varnum);
-                                                       NEWSTACK(copy->type, copy->varkind,
-                                                                        copy->varnum);
-                                                       SETDST;
+                                                       iptr->dst.dupslots = DMNEW(stackptr, 2 + 2);
+                                                       iptr->dst.dupslots[0] = curstack->prev; /* XXX live through */
+                                                       iptr->dst.dupslots[1] = curstack;       /* XXX live through */
+
+                                                       DUP_SLOT(iptr->dst.dupslots[0]);
+                                                       iptr->dst.dupslots[2+0] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[1]);
+                                                       iptr->dst.dupslots[2+1] = curstack;
                                                        stackdepth += 2;
                                                }
                                                break;
 
                                                /* pop 2 push 3 dup */
-                                               
+
                                        case ICMD_DUP_X1:
 #ifdef ENABLE_VERIFIER
                                                if (opt_verify) {
                                                        REQUIRE_2;
                                                        if (IS_2_WORD_TYPE(curstack->type) ||
                                                                IS_2_WORD_TYPE(curstack->prev->type))
-                                                                       goto throw_stack_category_error;
+                                                                       goto throw_stack_category_error;
                                                }
 #endif
                                                last_dupx = bptr->icount - len - 1;
-                                               DUP_X1;
+
+icmd_DUP_X1:
+                                               iptr->dst.dupslots = DMNEW(stackptr, 2 + 3);
+                                               iptr->dst.dupslots[0] = curstack->prev;
+                                               iptr->dst.dupslots[1] = curstack;
+                                               POPANY; POPANY;
+
+                                               DUP_SLOT(iptr->dst.dupslots[1]);
+                                               iptr->dst.dupslots[2+0] = curstack;
+                                               DUP_SLOT(iptr->dst.dupslots[0]);
+                                               iptr->dst.dupslots[2+1] = curstack;
+                                               DUP_SLOT(iptr->dst.dupslots[1]);
+                                               iptr->dst.dupslots[2+2] = curstack;
+                                               stackdepth++;
                                                break;
 
                                        case ICMD_DUP2_X1:
@@ -1721,11 +1841,11 @@ bool stack_analyse(jitdata *jd)
 #ifdef ENABLE_VERIFIER
                                                        if (opt_verify) {
                                                                if (IS_2_WORD_TYPE(curstack->prev->type))
-                                                                       goto throw_stack_category_error;
+                                                                       goto throw_stack_category_error;
                                                        }
 #endif
                                                        iptr->opc = ICMD_DUP_X1;
-                                                       DUP_X1;
+                                                       goto icmd_DUP_X1;
                                                }
                                                else {
                                                        /* ..., ????, cat1 */
@@ -1734,15 +1854,33 @@ bool stack_analyse(jitdata *jd)
                                                                REQUIRE_3;
                                                                if (IS_2_WORD_TYPE(curstack->prev->type)
                                                                        || IS_2_WORD_TYPE(curstack->prev->prev->type))
-                                                                               goto throw_stack_category_error;
+                                                                               goto throw_stack_category_error;
                                                        }
 #endif
-                                                       DUP2_X1;
+
+icmd_DUP2_X1:
+                                                       iptr->dst.dupslots = DMNEW(stackptr, 3 + 5);
+                                                       iptr->dst.dupslots[0] = curstack->prev->prev;
+                                                       iptr->dst.dupslots[1] = curstack->prev;
+                                                       iptr->dst.dupslots[2] = curstack;
+                                                       POPANY; POPANY; POPANY;
+
+                                                       DUP_SLOT(iptr->dst.dupslots[1]);
+                                                       iptr->dst.dupslots[3+0] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[2]);
+                                                       iptr->dst.dupslots[3+1] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[0]);
+                                                       iptr->dst.dupslots[3+2] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[1]);
+                                                       iptr->dst.dupslots[3+3] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[2]);
+                                                       iptr->dst.dupslots[3+4] = curstack;
+                                                       stackdepth += 2;
                                                }
                                                break;
 
                                                /* pop 3 push 4 dup */
-                                               
+
                                        case ICMD_DUP_X2:
                                                last_dupx = bptr->icount - len - 1;
                                                REQUIRE_2;
@@ -1751,11 +1889,11 @@ bool stack_analyse(jitdata *jd)
 #ifdef ENABLE_VERIFIER
                                                        if (opt_verify) {
                                                                if (IS_2_WORD_TYPE(curstack->type))
-                                                                       goto throw_stack_category_error;
+                                                                       goto throw_stack_category_error;
                                                        }
 #endif
                                                        iptr->opc = ICMD_DUP_X1;
-                                                       DUP_X1;
+                                                       goto icmd_DUP_X1;
                                                }
                                                else {
                                                        /* ..., cat1, ???? */
@@ -1764,10 +1902,25 @@ bool stack_analyse(jitdata *jd)
                                                                REQUIRE_3;
                                                                if (IS_2_WORD_TYPE(curstack->type)
                                                                        || IS_2_WORD_TYPE(curstack->prev->prev->type))
-                                                                                       goto throw_stack_category_error;
+                                                                                       goto throw_stack_category_error;
                                                        }
 #endif
-                                                       DUP_X2;
+icmd_DUP_X2:
+                                                       iptr->dst.dupslots = DMNEW(stackptr, 3 + 4);
+                                                       iptr->dst.dupslots[0] = curstack->prev->prev;
+                                                       iptr->dst.dupslots[1] = curstack->prev;
+                                                       iptr->dst.dupslots[2] = curstack;
+                                                       POPANY; POPANY; POPANY;
+
+                                                       DUP_SLOT(iptr->dst.dupslots[2]);
+                                                       iptr->dst.dupslots[3+0] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[0]);
+                                                       iptr->dst.dupslots[3+1] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[1]);
+                                                       iptr->dst.dupslots[3+2] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[2]);
+                                                       iptr->dst.dupslots[3+3] = curstack;
+                                                       stackdepth++;
                                                }
                                                break;
 
@@ -1779,7 +1932,7 @@ bool stack_analyse(jitdata *jd)
                                                        if (IS_2_WORD_TYPE(curstack->prev->type)) {
                                                                /* ..., cat2, cat2 */
                                                                iptr->opc = ICMD_DUP_X1;
-                                                               DUP_X1;
+                                                               goto icmd_DUP_X1;
                                                        }
                                                        else {
                                                                /* ..., cat1, cat2 */
@@ -1787,44 +1940,63 @@ bool stack_analyse(jitdata *jd)
                                                                if (opt_verify) {
                                                                        REQUIRE_3;
                                                                        if (IS_2_WORD_TYPE(curstack->prev->prev->type))
-                                                                                       goto throw_stack_category_error;
+                                                                                       goto throw_stack_category_error;
                                                                }
 #endif
                                                                iptr->opc = ICMD_DUP_X2;
-                                                               DUP_X2;
+                                                               goto icmd_DUP_X2;
                                                        }
                                                }
-                                               else {
-                                                       REQUIRE_3;
-                                                       /* ..., ????, ????, cat1 */
-                                                       if (IS_2_WORD_TYPE(curstack->prev->prev->type)) {
-                                                               /* ..., cat2, ????, cat1 */
+
+                                               REQUIRE_3;
+                                               /* ..., ????, ????, cat1 */
+
+                                               if (IS_2_WORD_TYPE(curstack->prev->prev->type)) {
+                                                       /* ..., cat2, ????, cat1 */
 #ifdef ENABLE_VERIFIER
-                                                               if (opt_verify) {
-                                                                       if (IS_2_WORD_TYPE(curstack->prev->type))
-                                                                               goto throw_stack_category_error;
-                                                               }
-#endif
-                                                               iptr->opc = ICMD_DUP2_X1;
-                                                               DUP2_X1;
+                                                       if (opt_verify) {
+                                                               if (IS_2_WORD_TYPE(curstack->prev->type))
+                                                                       goto throw_stack_category_error;
                                                        }
-                                                       else {
-                                                               /* ..., cat1, ????, cat1 */
-#ifdef ENABLE_VERIFIER
-                                                               if (opt_verify) {
-                                                                       REQUIRE_4;
-                                                                       if (IS_2_WORD_TYPE(curstack->prev->type)
-                                                                               || IS_2_WORD_TYPE(curstack->prev->prev->prev->type))
-                                                                               goto throw_stack_category_error;
-                                                               }
 #endif
-                                                               DUP2_X2;
+                                                       iptr->opc = ICMD_DUP2_X1;
+                                                       goto icmd_DUP2_X1;
+                                               }
+                                               else {
+                                                       /* ..., cat1, ????, cat1 */
+#ifdef ENABLE_VERIFIER
+                                                       if (opt_verify) {
+                                                               REQUIRE_4;
+                                                               if (IS_2_WORD_TYPE(curstack->prev->type)
+                                                                       || IS_2_WORD_TYPE(curstack->prev->prev->prev->type))
+                                                                       goto throw_stack_category_error;
                                                        }
+#endif
+                                                       iptr->dst.dupslots = DMNEW(stackptr, 4 + 6);
+                                                       iptr->dst.dupslots[0] = curstack->prev->prev->prev;
+                                                       iptr->dst.dupslots[1] = curstack->prev->prev;
+                                                       iptr->dst.dupslots[2] = curstack->prev;
+                                                       iptr->dst.dupslots[3] = curstack;
+                                                       POPANY; POPANY; POPANY; POPANY;
+
+                                                       DUP_SLOT(iptr->dst.dupslots[2]);
+                                                       iptr->dst.dupslots[4+0] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[3]);
+                                                       iptr->dst.dupslots[4+1] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[0]);
+                                                       iptr->dst.dupslots[4+2] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[1]);
+                                                       iptr->dst.dupslots[4+3] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[2]);
+                                                       iptr->dst.dupslots[4+4] = curstack;
+                                                       DUP_SLOT(iptr->dst.dupslots[3]);
+                                                       iptr->dst.dupslots[4+5] = curstack;
+                                                       stackdepth += 2;
                                                }
                                                break;
 
                                                /* pop 2 push 2 swap */
-                                               
+
                                        case ICMD_SWAP:
                                                last_dupx = bptr->icount - len - 1;
 #ifdef ENABLE_VERIFIER
@@ -1835,7 +2007,15 @@ bool stack_analyse(jitdata *jd)
                                                                goto throw_stack_category_error;
                                                }
 #endif
-                                               SWAP;
+                                               iptr->dst.dupslots = DMNEW(stackptr, 2 + 2);
+                                               iptr->dst.dupslots[0] = curstack->prev;
+                                               iptr->dst.dupslots[1] = curstack;
+                                               POPANY; POPANY;
+
+                                               DUP_SLOT(iptr->dst.dupslots[1]);
+                                               iptr->dst.dupslots[2+0] = curstack;
+                                               DUP_SLOT(iptr->dst.dupslots[0]);
+                                               iptr->dst.dupslots[2+1] = curstack;
                                                break;
 
                                                /* pop 2 push 1 */
@@ -1843,9 +2023,8 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_IDIV:
                                        case ICMD_IREM:
 #if !SUPPORT_DIVISION
-                                               bte = (builtintable_entry *) iptr->val.a;
+                                               bte = iptr->sx.s23.s3.bte;
                                                md = bte->md;
-                                               i = iptr->op1;
 
                                                if (md->memuse > rd->memuse)
                                                        rd->memuse = md->memuse;
@@ -1859,8 +2038,8 @@ bool stack_analyse(jitdata *jd)
                                                        copy->flags |= SAVEDVAR;
                                                        copy = copy->prev;
                                                }
+                                               /* FALLTHROUGH */
 
-                                               /* fall through */
 #endif /* !SUPPORT_DIVISION */
 
                                        case ICMD_ISHL:
@@ -1873,20 +2052,20 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_IOR:
                                        case ICMD_IXOR:
                                                COUNT(count_pcmd_op);
-                                               OP2_1(TYPE_INT);
+                                               NEW_OP2_1(TYPE_INT, TYPE_INT, TYPE_INT);
                                                break;
 
                                        case ICMD_LDIV:
                                        case ICMD_LREM:
 #if !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV)
-                                               bte = (builtintable_entry *) iptr->val.a;
+                                               bte = iptr->sx.s23.s3.bte;
                                                md = bte->md;
-                                               i = iptr->op1;
 
                                                if (md->memuse > rd->memuse)
                                                        rd->memuse = md->memuse;
                                                if (md->argintreguse > rd->argintreguse)
                                                        rd->argintreguse = md->argintreguse;
+                                               /* XXX non-leaf method? */
 
                                                /* make all stack variables saved */
 
@@ -1895,8 +2074,8 @@ bool stack_analyse(jitdata *jd)
                                                        copy->flags |= SAVEDVAR;
                                                        copy = copy->prev;
                                                }
+                                               /* FALLTHROUGH */
 
-                                               /* fall through */
 #endif /* !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV) */
 
                                        case ICMD_LMUL:
@@ -1908,14 +2087,14 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_LXOR:
 #endif /* SUPPORT_LONG_LOGICAL */
                                                COUNT(count_pcmd_op);
-                                               OP2_1(TYPE_LNG);
+                                               NEW_OP2_1(TYPE_LNG, TYPE_LNG, TYPE_LNG);
                                                break;
 
                                        case ICMD_LSHL:
                                        case ICMD_LSHR:
                                        case ICMD_LUSHR:
                                                COUNT(count_pcmd_op);
-                                               OP2IT_1(TYPE_LNG);
+                                               NEW_OP2_1(TYPE_LNG, TYPE_INT, TYPE_LNG);
                                                break;
 
                                        case ICMD_FADD:
@@ -1924,7 +2103,7 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_FDIV:
                                        case ICMD_FREM:
                                                COUNT(count_pcmd_op);
-                                               OP2_1(TYPE_FLT);
+                                               NEW_OP2_1(TYPE_FLT, TYPE_FLT, TYPE_FLT);
                                                break;
 
                                        case ICMD_DADD:
@@ -1933,138 +2112,303 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_DDIV:
                                        case ICMD_DREM:
                                                COUNT(count_pcmd_op);
-                                               OP2_1(TYPE_DBL);
+                                               NEW_OP2_1(TYPE_DBL, TYPE_DBL, TYPE_DBL);
                                                break;
 
                                        case ICMD_LCMP:
                                                COUNT(count_pcmd_op);
 #if SUPPORT_LONG_CMP_CONST
-                                               if ((len > 0) && (iptr[1].val.i == 0)) {
-                                                       switch (iptr[1].opc) {
-                                                       case ICMD_IFEQ:
-                                                               iptr[0].opc = ICMD_IF_LCMPEQ;
-                                                       icmd_lcmp_if_tail:
-                                                               iptr[0].op1 = iptr[1].op1;
-                                                               iptr[1].opc = ICMD_NOP;
-/*                                                             len--; */
-/*                                                             bptr->icount--; */
+                                               if ((len == 0) || (iptr[1].sx.val.i != 0))
+                                                       goto normal_LCMP;
+
+                                               switch (iptr[1].opc) {
+                                               case ICMD_IFEQ:
+                                                       iptr->opc = ICMD_IF_LCMPEQ;
+                                               icmd_lcmp_if_tail:
+                                                       iptr->dst.insindex = iptr[1].dst.insindex;
+                                                       iptr[1].opc = ICMD_NOP;
+
+                                                       NEW_OP2_BRANCH(TYPE_LNG, TYPE_LNG);
+                                                       BRANCH(tbptr, copy);
+
+                                                       COUNT(count_pcmd_bra);
+                                                       break;
+                                               case ICMD_IFNE:
+                                                       iptr->opc = ICMD_IF_LCMPNE;
+                                                       goto icmd_lcmp_if_tail;
+                                               case ICMD_IFLT:
+                                                       iptr->opc = ICMD_IF_LCMPLT;
+                                                       goto icmd_lcmp_if_tail;
+                                               case ICMD_IFGT:
+                                                       iptr->opc = ICMD_IF_LCMPGT;
+                                                       goto icmd_lcmp_if_tail;
+                                               case ICMD_IFLE:
+                                                       iptr->opc = ICMD_IF_LCMPLE;
+                                                       goto icmd_lcmp_if_tail;
+                                               case ICMD_IFGE:
+                                                       iptr->opc = ICMD_IF_LCMPGE;
+                                                       goto icmd_lcmp_if_tail;
+                                               default:
+                                                       goto normal_LCMP;
+                                               }
+                                               break;
+normal_LCMP:
+#endif /* SUPPORT_LONG_CMP_CONST */
+                                                       NEW_OP2_1(TYPE_LNG, TYPE_LNG, TYPE_INT);
+                                               break;
 
-                                                               OP2_0(TYPE_LNG);
-                                                               tbptr = m->basicblocks +
-                                                                       m->basicblockindex[iptr[0].op1];
-                       
-                                                               iptr[0].target = (void *) tbptr;
+                                               /* XXX why is this deactivated? */
+#if 0
+                                       case ICMD_FCMPL:
+                                               COUNT(count_pcmd_op);
+                                               if ((len == 0) || (iptr[1].sx.val.i != 0))
+                                                       goto normal_FCMPL;
+
+                                               switch (iptr[1].opc) {
+                                               case ICMD_IFEQ:
+                                                       iptr->opc = ICMD_IF_FCMPEQ;
+                                               icmd_if_fcmpl_tail:
+                                                       iptr->dst.insindex = iptr[1].dst.insindex;
+                                                       iptr[1].opc = ICMD_NOP;
+
+                                                       NEW_OP2_BRANCH(TYPE_FLT, TYPE_FLT);
+                                                       BRANCH(tbptr, copy);
+
+                                                       COUNT(count_pcmd_bra);
+                                                       break;
+                                               case ICMD_IFNE:
+                                                       iptr->opc = ICMD_IF_FCMPNE;
+                                                       goto icmd_if_fcmpl_tail;
+                                               case ICMD_IFLT:
+                                                       iptr->opc = ICMD_IF_FCMPL_LT;
+                                                       goto icmd_if_fcmpl_tail;
+                                               case ICMD_IFGT:
+                                                       iptr->opc = ICMD_IF_FCMPL_GT;
+                                                       goto icmd_if_fcmpl_tail;
+                                               case ICMD_IFLE:
+                                                       iptr->opc = ICMD_IF_FCMPL_LE;
+                                                       goto icmd_if_fcmpl_tail;
+                                               case ICMD_IFGE:
+                                                       iptr->opc = ICMD_IF_FCMPL_GE;
+                                                       goto icmd_if_fcmpl_tail;
+                                               default:
+                                                       goto normal_FCMPL;
+                                               }
+                                               break;
 
-                                                               MARKREACHED(tbptr, copy);
-                                                               COUNT(count_pcmd_bra);
-                                                               break;
-                                                       case ICMD_IFNE:
-                                                               iptr[0].opc = ICMD_IF_LCMPNE;
-                                                               goto icmd_lcmp_if_tail;
-                                                       case ICMD_IFLT:
-                                                               iptr[0].opc = ICMD_IF_LCMPLT;
-                                                               goto icmd_lcmp_if_tail;
-                                                       case ICMD_IFGT:
-                                                               iptr[0].opc = ICMD_IF_LCMPGT;
-                                                               goto icmd_lcmp_if_tail;
-                                                       case ICMD_IFLE:
-                                                               iptr[0].opc = ICMD_IF_LCMPLE;
-                                                               goto icmd_lcmp_if_tail;
-                                                       case ICMD_IFGE:
-                                                               iptr[0].opc = ICMD_IF_LCMPGE;
-                                                               goto icmd_lcmp_if_tail;
-                                                       default:
-                                                               OPTT2_1(TYPE_LNG, TYPE_INT);
-                                                       }
+normal_FCMPL:
+                                               OPTT2_1(TYPE_FLT, TYPE_FLT, TYPE_INT);
+                                               break;
+
+                                       case ICMD_FCMPG:
+                                               COUNT(count_pcmd_op);
+                                               if ((len == 0) || (iptr[1].sx.val.i != 0))
+                                                       goto normal_FCMPG;
+
+                                               switch (iptr[1].opc) {
+                                               case ICMD_IFEQ:
+                                                       iptr->opc = ICMD_IF_FCMPEQ;
+                                               icmd_if_fcmpg_tail:
+                                                       iptr->dst.insindex = iptr[1].dst.insindex;
+                                                       iptr[1].opc = ICMD_NOP;
+
+                                                       NEW_OP2_BRANCH(TYPE_FLT, TYPE_FLT);
+                                                       BRANCH(tbptr, copy);
+
+                                                       COUNT(count_pcmd_bra);
+                                                       break;
+                                               case ICMD_IFNE:
+                                                       iptr->opc = ICMD_IF_FCMPNE;
+                                                       goto icmd_if_fcmpg_tail;
+                                               case ICMD_IFLT:
+                                                       iptr->opc = ICMD_IF_FCMPG_LT;
+                                                       goto icmd_if_fcmpg_tail;
+                                               case ICMD_IFGT:
+                                                       iptr->opc = ICMD_IF_FCMPG_GT;
+                                                       goto icmd_if_fcmpg_tail;
+                                               case ICMD_IFLE:
+                                                       iptr->opc = ICMD_IF_FCMPG_LE;
+                                                       goto icmd_if_fcmpg_tail;
+                                               case ICMD_IFGE:
+                                                       iptr->opc = ICMD_IF_FCMPG_GE;
+                                                       goto icmd_if_fcmpg_tail;
+                                               default:
+                                                       goto normal_FCMPG;
+                                               }
+                                               break;
+
+normal_FCMPG:
+                                               NEW_OP2_1(TYPE_FLT, TYPE_FLT, TYPE_INT);
+                                               break;
+
+                                       case ICMD_DCMPL:
+                                               COUNT(count_pcmd_op);
+                                               if ((len == 0) || (iptr[1].sx.val.i != 0))
+                                                       goto normal_DCMPL;
+
+                                               switch (iptr[1].opc) {
+                                               case ICMD_IFEQ:
+                                                       iptr->opc = ICMD_IF_DCMPEQ;
+                                               icmd_if_dcmpl_tail:
+                                                       iptr->dst.insindex = iptr[1].dst.insindex;
+                                                       iptr[1].opc = ICMD_NOP;
+
+                                                       NEW_OP2_BRANCH(TYPE_DBL, TYPE_DBL);
+                                                       BRANCH(tbptr, copy);
+
+                                                       COUNT(count_pcmd_bra);
+                                                       break;
+                                               case ICMD_IFNE:
+                                                       iptr->opc = ICMD_IF_DCMPNE;
+                                                       goto icmd_if_dcmpl_tail;
+                                               case ICMD_IFLT:
+                                                       iptr->opc = ICMD_IF_DCMPL_LT;
+                                                       goto icmd_if_dcmpl_tail;
+                                               case ICMD_IFGT:
+                                                       iptr->opc = ICMD_IF_DCMPL_GT;
+                                                       goto icmd_if_dcmpl_tail;
+                                               case ICMD_IFLE:
+                                                       iptr->opc = ICMD_IF_DCMPL_LE;
+                                                       goto icmd_if_dcmpl_tail;
+                                               case ICMD_IFGE:
+                                                       iptr->opc = ICMD_IF_DCMPL_GE;
+                                                       goto icmd_if_dcmpl_tail;
+                                               default:
+                                                       goto normal_DCMPL;
+                                               }
+                                               break;
+
+normal_DCMPL:
+                                               OPTT2_1(TYPE_DBL, TYPE_INT);
+                                               break;
+
+                                       case ICMD_DCMPG:
+                                               COUNT(count_pcmd_op);
+                                               if ((len == 0) || (iptr[1].sx.val.i != 0))
+                                                       goto normal_DCMPG;
+
+                                               switch (iptr[1].opc) {
+                                               case ICMD_IFEQ:
+                                                       iptr->opc = ICMD_IF_DCMPEQ;
+                                               icmd_if_dcmpg_tail:
+                                                       iptr->dst.insindex = iptr[1].dst.insindex;
+                                                       iptr[1].opc = ICMD_NOP;
+
+                                                       NEW_OP2_BRANCH(TYPE_DBL, TYPE_DBL);
+                                                       BRANCH(tbptr, copy);
+
+                                                       COUNT(count_pcmd_bra);
+                                                       break;
+                                               case ICMD_IFNE:
+                                                       iptr->opc = ICMD_IF_DCMPNE;
+                                                       goto icmd_if_dcmpg_tail;
+                                               case ICMD_IFLT:
+                                                       iptr->opc = ICMD_IF_DCMPG_LT;
+                                                       goto icmd_if_dcmpg_tail;
+                                               case ICMD_IFGT:
+                                                       iptr->opc = ICMD_IF_DCMPG_GT;
+                                                       goto icmd_if_dcmpg_tail;
+                                               case ICMD_IFLE:
+                                                       iptr->opc = ICMD_IF_DCMPG_LE;
+                                                       goto icmd_if_dcmpg_tail;
+                                               case ICMD_IFGE:
+                                                       iptr->opc = ICMD_IF_DCMPG_GE;
+                                                       goto icmd_if_dcmpg_tail;
+                                               default:
+                                                       goto normal_DCMPG;
                                                }
-                                               else
-#endif /* SUPPORT_LONG_CMP_CONST */
-                                                       OPTT2_1(TYPE_LNG, TYPE_INT);
                                                break;
+
+normal_DCMPG:
+                                               NEW_OP2_1(TYPE_DBL, TYPE_DBL, TYPE_INT);
+                                               break;
+#else
                                        case ICMD_FCMPL:
                                        case ICMD_FCMPG:
                                                COUNT(count_pcmd_op);
-                                               OPTT2_1(TYPE_FLT, TYPE_INT);
+                                               NEW_OP2_1(TYPE_FLT, TYPE_FLT, TYPE_INT);
                                                break;
+
                                        case ICMD_DCMPL:
                                        case ICMD_DCMPG:
                                                COUNT(count_pcmd_op);
-                                               OPTT2_1(TYPE_DBL, TYPE_INT);
+                                               NEW_OP2_1(TYPE_DBL, TYPE_DBL, TYPE_INT);
                                                break;
+#endif
 
                                                /* pop 1 push 1 */
-                                               
+
                                        case ICMD_INEG:
                                        case ICMD_INT2BYTE:
                                        case ICMD_INT2CHAR:
                                        case ICMD_INT2SHORT:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_INT, TYPE_INT);
+                                               NEW_OP1_1(TYPE_INT, TYPE_INT);
                                                break;
                                        case ICMD_LNEG:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_LNG, TYPE_LNG);
+                                               NEW_OP1_1(TYPE_LNG, TYPE_LNG);
                                                break;
                                        case ICMD_FNEG:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_FLT, TYPE_FLT);
+                                               NEW_OP1_1(TYPE_FLT, TYPE_FLT);
                                                break;
                                        case ICMD_DNEG:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_DBL, TYPE_DBL);
+                                               NEW_OP1_1(TYPE_DBL, TYPE_DBL);
                                                break;
 
                                        case ICMD_I2L:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_INT, TYPE_LNG);
+                                               NEW_OP1_1(TYPE_INT, TYPE_LNG);
                                                break;
                                        case ICMD_I2F:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_INT, TYPE_FLT);
+                                               NEW_OP1_1(TYPE_INT, TYPE_FLT);
                                                break;
                                        case ICMD_I2D:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_INT, TYPE_DBL);
+                                               NEW_OP1_1(TYPE_INT, TYPE_DBL);
                                                break;
                                        case ICMD_L2I:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_LNG, TYPE_INT);
+                                               NEW_OP1_1(TYPE_LNG, TYPE_INT);
                                                break;
                                        case ICMD_L2F:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_LNG, TYPE_FLT);
+                                               NEW_OP1_1(TYPE_LNG, TYPE_FLT);
                                                break;
                                        case ICMD_L2D:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_LNG, TYPE_DBL);
+                                               NEW_OP1_1(TYPE_LNG, TYPE_DBL);
                                                break;
                                        case ICMD_F2I:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_FLT, TYPE_INT);
+                                               NEW_OP1_1(TYPE_FLT, TYPE_INT);
                                                break;
                                        case ICMD_F2L:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_FLT, TYPE_LNG);
+                                               NEW_OP1_1(TYPE_FLT, TYPE_LNG);
                                                break;
                                        case ICMD_F2D:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_FLT, TYPE_DBL);
+                                               NEW_OP1_1(TYPE_FLT, TYPE_DBL);
                                                break;
                                        case ICMD_D2I:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_DBL, TYPE_INT);
+                                               NEW_OP1_1(TYPE_DBL, TYPE_INT);
                                                break;
                                        case ICMD_D2L:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_DBL, TYPE_LNG);
+                                               NEW_OP1_1(TYPE_DBL, TYPE_LNG);
                                                break;
                                        case ICMD_D2F:
                                                COUNT(count_pcmd_op);
-                                               OP1_1(TYPE_DBL, TYPE_FLT);
+                                               NEW_OP1_1(TYPE_DBL, TYPE_FLT);
                                                break;
 
                                        case ICMD_CHECKCAST:
-                                               if (iptr->op1 == 0) {
+                                               if (iptr->flags.bits & INS_FLAG_ARRAY) {
                                                        /* array type cast-check */
 
                                                        bte = builtintable_get_internal(BUILTIN_arraycheckcast);
@@ -2083,64 +2427,61 @@ bool stack_analyse(jitdata *jd)
                                                                copy = copy->prev;
                                                        }
                                                }
-                                               OP1_1(TYPE_ADR, TYPE_ADR);
+                                               NEW_OP1_1(TYPE_ADR, TYPE_ADR);
                                                break;
 
                                        case ICMD_INSTANCEOF:
                                        case ICMD_ARRAYLENGTH:
-                                               OP1_1(TYPE_ADR, TYPE_INT);
+                                               NEW_OP1_1(TYPE_ADR, TYPE_INT);
                                                break;
 
                                        case ICMD_NEWARRAY:
                                        case ICMD_ANEWARRAY:
-                                               OP1_1(TYPE_INT, TYPE_ADR);
+                                               NEW_OP1_1(TYPE_INT, TYPE_ADR);
                                                break;
 
                                        case ICMD_GETFIELD:
                                                COUNT(count_check_null);
                                                COUNT(count_pcmd_mem);
-                                               OP1_1(TYPE_ADR, iptr->op1);
+                                               NEW_INSTRUCTION_GET_FIELDREF(iptr, fmiref);
+                                               NEW_OP1_1(TYPE_ADR, fmiref->parseddesc.fd->type);
                                                break;
 
                                                /* pop 0 push 1 */
-                                               
+
                                        case ICMD_GETSTATIC:
                                                COUNT(count_pcmd_mem);
-                                               OP0_1(iptr->op1);
+                                               NEW_INSTRUCTION_GET_FIELDREF(iptr, fmiref);
+                                               NEW_OP0_1(fmiref->parseddesc.fd->type);
                                                break;
 
                                        case ICMD_NEW:
-                                               OP0_1(TYPE_ADR);
+                                               NEW_OP0_1(TYPE_ADR);
                                                break;
 
                                        case ICMD_JSR:
-                                               OP0_1(TYPE_ADR);
-                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
+                                               NEW_OP0_1(TYPE_ADR);
 
-                                               iptr[0].target = (void *) tbptr;
-
-                                               /* This is a dirty hack. The typechecker
-                                                * needs it because the OP1_0ANY below
-                                                * overwrites iptr->dst.
-                                                */
-                                               iptr->val.a = (void *) iptr->dst;
+                                               BRANCH_TARGET(iptr->sx.s23.s3.jsrtarget, tbptr, copy);
 
                                                tbptr->type = BBTYPE_SBR;
 
                                                /* We need to check for overflow right here because
-                                                * the pushed value is poped after MARKREACHED. */
-                                               CHECKOVERFLOW;
-                                               MARKREACHED(tbptr, copy);
-                                               OP1_0ANY;
+                                                * the pushed value is poped afterwards */
+                                               NEW_CHECKOVERFLOW;
+
+                                               /* calculate stack after return */
+                                               POPANY;
+                                               stackdepth--;
                                                break;
 
                                        /* pop many push any */
 
                                        case ICMD_BUILTIN:
 #if defined(USEBUILTINTABLE)
-                                       builtin:
+icmd_BUILTIN:
 #endif
-                                               bte = (builtintable_entry *) iptr->val.a;
+                                               bte = iptr->sx.s23.s3.bte;
                                                md = bte->md;
                                                goto _callhandling;
 
@@ -2149,9 +2490,10 @@ bool stack_analyse(jitdata *jd)
                                        case ICMD_INVOKEVIRTUAL:
                                        case ICMD_INVOKEINTERFACE:
                                                COUNT(count_pcmd_met);
-                                               INSTRUCTION_GET_METHODDESC(iptr,md);
+                                               NEW_INSTRUCTION_GET_METHODDESC(iptr, md);
+                                               /* XXX resurrect this COUNT? */
 /*                          if (lm->flags & ACC_STATIC) */
-/*                              {COUNT(count_check_null);} */   
+/*                              {COUNT(count_check_null);} */
 
                                        _callhandling:
 
@@ -2168,14 +2510,21 @@ bool stack_analyse(jitdata *jd)
 
                                                REQUIRE(i);
 
+                                               /* XXX optimize for <= 2 args */
+                                               /* XXX not for ICMD_BUILTIN */
+                                               iptr->s1.argcount = stackdepth;
+                                               iptr->sx.s23.s2.args = DMNEW(stackptr, stackdepth);
+
                                                copy = curstack;
                                                for (i-- ; i >= 0; i--) {
+                                                       iptr->sx.s23.s2.args[i] = copy;
+
 #if defined(SUPPORT_PASS_FLOATARGS_IN_INTREGS)
-                                               /* If we pass float arguments in integer argument registers, we
-                                                * are not allowed to precolor them here. Floats have to be moved
-                                                * to this regs explicitly in codegen().
-                                                * Only arguments that are passed by stack anyway can be precolored
-                                                * (michi 2005/07/24) */
+                                                       /* If we pass float arguments in integer argument registers, we
+                                                        * are not allowed to precolor them here. Floats have to be moved
+                                                        * to this regs explicitly in codegen().
+                                                        * Only arguments that are passed by stack anyway can be precolored
+                                                        * (michi 2005/07/24) */
                                                        if (!(copy->flags & SAVEDVAR) &&
                                                           (!IS_FLT_DBL_TYPE(copy->type) || md->params[i].inmemory)) {
 #else
@@ -2190,65 +2539,87 @@ bool stack_analyse(jitdata *jd)
                                                                        if (md->params[i].inmemory) {
                                                                                copy->flags = INMEMORY;
                                                                                copy->regoff = md->params[i].regoff;
-                                                                       } 
+                                                                       }
                                                                        else {
                                                                                copy->flags = 0;
-                                                                               if (IS_FLT_DBL_TYPE(copy->type))
+                                                                               if (IS_FLT_DBL_TYPE(copy->type)) {
 #if defined(SUPPORT_PASS_FLOATARGS_IN_INTREGS)
                                                                                        assert(0); /* XXX is this assert ok? */
 #else
-                                                                               copy->regoff =
-                                                                                       rd->argfltregs[md->params[i].regoff];
-#endif
+                                                                                       copy->regoff =
+                                                                                               rd->argfltregs[md->params[i].regoff];
+#endif /* SUPPORT_PASS_FLOATARGS_IN_INTREGS */
+                                                                               }
                                                                                else {
 #if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
                                                                                        if (IS_2_WORD_TYPE(copy->type))
                                                                                                copy->regoff = PACK_REGS(
-                                                                                                                                                rd->argintregs[GET_LOW_REG(md->params[i].regoff)],
-                                                                                                                                                rd->argintregs[GET_HIGH_REG(md->params[i].regoff)]);
+                                                                                                       rd->argintregs[GET_LOW_REG(md->params[i].regoff)],
+                                                                                                       rd->argintregs[GET_HIGH_REG(md->params[i].regoff)]);
                                                                                        else
-#endif
+#endif /* SUPPORT_COMBINE_INTEGER_REGISTERS */
                                                                                                copy->regoff =
                                                                                                        rd->argintregs[md->params[i].regoff];
                                                                                }
                                                                        }
 #if defined(ENABLE_INTRP)
-                                                               }
+                                                               } /* end if (!opt_intrp) */
 #endif
                                                        }
                                                        copy = copy->prev;
                                                }
 
+                                               /* deal with live-through stack slots "under" the arguments */
+                                               /* XXX not for ICMD_BUILTIN */
+
+                                               i = md->paramcount;
+
                                                while (copy) {
+                                                       iptr->sx.s23.s2.args[i++] = copy;
                                                        copy->flags |= SAVEDVAR;
                                                        copy = copy->prev;
                                                }
 
+                                               /* pop the arguments */
+
                                                i = md->paramcount;
-                                               POPMANY(i);
-                                               if (md->returntype.type != TYPE_VOID)
-                                                       OP0_1(md->returntype.type);
+
+                                               stackdepth -= i;
+                                               while (--i >= 0) {
+                                                       POPANY;
+                                               }
+
+                                               /* push the return value */
+
+                                               if (md->returntype.type != TYPE_VOID) {
+                                                       NEW_DST(md->returntype.type, stackdepth);
+                                                       stackdepth++;
+                                               }
                                                break;
 
                                        case ICMD_INLINE_START:
                                        case ICMD_INLINE_END:
-                                               SETDST;
+                                               CLR_S1;
+                                               CLR_DST;
                                                break;
 
                                        case ICMD_MULTIANEWARRAY:
                                                if (rd->argintreguse < 3)
                                                        rd->argintreguse = 3;
 
-                                               i = iptr->op1;
+                                               i = iptr->s1.argcount;
 
                                                REQUIRE(i);
+
+                                               iptr->sx.s23.s2.args = DMNEW(stackptr, i);
+
 #if defined(SPECIALMEMUSE)
 # if defined(__DARWIN__)
-                                               if (rd->memuse < (i + INT_ARG_CNT + LA_WORD_SIZE))
-                                                       rd->memuse = i + LA_WORD_SIZE + INT_ARG_CNT;
+                                               if (rd->memuse < (i + INT_ARG_CNT + LA_SIZE_IN_POINTERS))
+                                                       rd->memuse = i + LA_SIZE_IN_POINTERS + INT_ARG_CNT;
 # else
-                                               if (rd->memuse < (i + LA_WORD_SIZE + 3))
-                                                       rd->memuse = i + LA_WORD_SIZE + 3;
+                                               if (rd->memuse < (i + LA_SIZE_IN_POINTERS + 3))
+                                                       rd->memuse = i + LA_SIZE_IN_POINTERS + 3;
 # endif
 #else
 # if defined(__I386__)
@@ -2265,15 +2636,16 @@ bool stack_analyse(jitdata *jd)
                                                copy = curstack;
                                                while (--i >= 0) {
                                                        /* check INT type here? Currently typecheck does this. */
+                                                       iptr->sx.s23.s2.args[i] = copy;
                                                        if (!(copy->flags & SAVEDVAR)) {
                                                                copy->varkind = ARGVAR;
                                                                copy->varnum = i + INT_ARG_CNT;
                                                                copy->flags |= INMEMORY;
 #if defined(SPECIALMEMUSE)
 # if defined(__DARWIN__)
-                                                               copy->regoff = i + LA_WORD_SIZE + INT_ARG_CNT;
+                                                               copy->regoff = i + LA_SIZE_IN_POINTERS + INT_ARG_CNT;
 # else
-                                                               copy->regoff = i + LA_WORD_SIZE + 3;
+                                                               copy->regoff = i + LA_SIZE_IN_POINTERS + 3;
 # endif
 #else
 # if defined(__I386__)
@@ -2291,9 +2663,14 @@ bool stack_analyse(jitdata *jd)
                                                        copy->flags |= SAVEDVAR;
                                                        copy = copy->prev;
                                                }
-                                               i = iptr->op1;
-                                               POPMANY(i);
-                                               OP0_1(TYPE_ADR);
+
+                                               i = iptr->s1.argcount;
+                                               stackdepth -= i;
+                                               while (--i >= 0) {
+                                                       POPANY;
+                                               }
+                                               NEW_DST(TYPE_ADR, stackdepth);
+                                               stackdepth++;
                                                break;
 
                                        default:
@@ -2302,7 +2679,7 @@ bool stack_analyse(jitdata *jd)
                                                return false;
                                        } /* switch */
 
-                                       CHECKOVERFLOW;
+                                       NEW_CHECKOVERFLOW;
                                        iptr++;
                                } /* while instructions */
 
@@ -2348,20 +2725,23 @@ bool stack_analyse(jitdata *jd)
                } /* while blocks */
        } while (repeat && !deadcode);
 
+       /* gather statistics *****************************************************/
+
 #if defined(ENABLE_STATISTICS)
        if (opt_stat) {
-               if (m->basicblockcount > count_max_basic_blocks)
-                       count_max_basic_blocks = m->basicblockcount;
-               count_basic_blocks += m->basicblockcount;
-               if (m->instructioncount > count_max_javainstr)                  count_max_javainstr = m->instructioncount;
-               count_javainstr += m->instructioncount;
-               if (m->stackcount > count_upper_bound_new_stack)
-                       count_upper_bound_new_stack = m->stackcount;
-               if ((new - m->stack) > count_max_new_stack)
-                       count_max_new_stack = (new - m->stack);
-
-               b_count = m->basicblockcount;
-               bptr = m->basicblocks;
+               if (jd->new_basicblockcount > count_max_basic_blocks)
+                       count_max_basic_blocks = jd->new_basicblockcount;
+               count_basic_blocks += jd->new_basicblockcount;
+               if (jd->new_instructioncount > count_max_javainstr)
+                       count_max_javainstr = jd->new_instructioncount;
+               count_javainstr += jd->new_instructioncount;
+               if (jd->new_stackcount > count_upper_bound_new_stack)
+                       count_upper_bound_new_stack = jd->new_stackcount;
+               if ((new - jd->new_stack) > count_max_new_stack)
+                       count_max_new_stack = (new - jd->new_stack);
+
+               b_count = jd->new_basicblockcount;
+               bptr = jd->new_basicblocks;
                while (--b_count >= 0) {
                        if (bptr->flags > BBREACHED) {
                                if (bptr->indepth >= 10)
@@ -2369,7 +2749,7 @@ bool stack_analyse(jitdata *jd)
                                else
                                        count_block_stack[bptr->indepth]++;
                                len = bptr->icount;
-                               if (len < 10) 
+                               if (len < 10)
                                        count_block_size_distribution[len]++;
                                else if (len <= 12)
                                        count_block_size_distribution[10]++;
@@ -2391,55 +2771,56 @@ bool stack_analyse(jitdata *jd)
                        bptr++;
                }
 
-               if (loops == 1)
+               if (iteration_count == 1)
                        count_analyse_iterations[0]++;
-               else if (loops == 2)
+               else if (iteration_count == 2)
                        count_analyse_iterations[1]++;
-               else if (loops == 3)
+               else if (iteration_count == 3)
                        count_analyse_iterations[2]++;
-               else if (loops == 4)
+               else if (iteration_count == 4)
                        count_analyse_iterations[3]++;
                else
                        count_analyse_iterations[4]++;
 
-               if (m->basicblockcount <= 5)
+               if (jd->new_basicblockcount <= 5)
                        count_method_bb_distribution[0]++;
-               else if (m->basicblockcount <= 10)
+               else if (jd->new_basicblockcount <= 10)
                        count_method_bb_distribution[1]++;
-               else if (m->basicblockcount <= 15)
+               else if (jd->new_basicblockcount <= 15)
                        count_method_bb_distribution[2]++;
-               else if (m->basicblockcount <= 20)
+               else if (jd->new_basicblockcount <= 20)
                        count_method_bb_distribution[3]++;
-               else if (m->basicblockcount <= 30)
+               else if (jd->new_basicblockcount <= 30)
                        count_method_bb_distribution[4]++;
-               else if (m->basicblockcount <= 40)
+               else if (jd->new_basicblockcount <= 40)
                        count_method_bb_distribution[5]++;
-               else if (m->basicblockcount <= 50)
+               else if (jd->new_basicblockcount <= 50)
                        count_method_bb_distribution[6]++;
-               else if (m->basicblockcount <= 75)
+               else if (jd->new_basicblockcount <= 75)
                        count_method_bb_distribution[7]++;
                else
                        count_method_bb_distribution[8]++;
        }
 #endif /* defined(ENABLE_STATISTICS) */
 
-       /* everything's ok */
+       /* everything's ok *******************************************************/
 
        return true;
 
+       /* goto labels for throwing verifier exceptions **************************/
+
 #if defined(ENABLE_VERIFIER)
 
 throw_stack_underflow:
-       *exceptionptr =
-               new_verifyerror(m, "Unable to pop operand off an empty stack");
+       exceptions_throw_verifyerror(m, "Unable to pop operand off an empty stack");
        return false;
 
 throw_stack_overflow:
-       *exceptionptr = new_verifyerror(m, "Stack size too large");
+       exceptions_throw_verifyerror(m, "Stack size too large");
        return false;
 
 throw_stack_depth_error:
-       *exceptionptr = new_verifyerror(m,"Stack depth mismatch");
+       exceptions_throw_verifyerror(m,"Stack depth mismatch");
        return false;
 
 throw_stack_type_error:
@@ -2447,1045 +2828,2379 @@ throw_stack_type_error:
        return false;
 
 throw_stack_category_error:
-       *exceptionptr =
-               new_verifyerror(m, "Attempt to split long or double on the stack");
+       exceptions_throw_verifyerror(m, "Attempt to split long or double on the stack");
        return false;
 
 #endif
 }
 
+bool stack_analyse(jitdata *jd)
+{
+       methodinfo   *m;
+       codeinfo     *code;
+       codegendata  *cd;
+       registerdata *rd;
+       int           b_count;
+       int           b_index;
+       int           stackdepth;
+       stackptr      curstack;
+       stackptr      new;
+       stackptr      copy;
+       int           opcode, i, j, len, loops;
+       int           superblockend, repeat, deadcode;
+       instruction  *iptr;
+       basicblock   *bptr;
+       basicblock   *tbptr;
+       s4           *s4ptr;
+       void        **tptr;
+       s4           *last_store;/* instruction index of last XSTORE */
+                                /* [ local_index * 5 + type ] */
+       s4            last_pei;  /* instruction index of last possible exception */
+                                /* used for conflict resolution for copy        */
+                             /* elimination (XLOAD, IINC, XSTORE) */
+       s4            last_dupx;
+#if defined(ENABLE_VERIFIER)
+       int           expectedtype; /* used by CHECK_BASIC_TYPE */
+#endif
 
-/* debugging helpers **********************************************************/
+       builtintable_entry *bte;
+       methoddesc         *md;
 
-/* stack_print_stack ***********************************************************
+       /* get required compiler data */
 
-   Print the stack representation starting with the given top stackptr.
+       m    = jd->m;
+       code = jd->code;
+       cd   = jd->cd;
+       rd   = jd->rd;
 
-   NOTE: Currently this function may only be called after register allocation!
+       last_store = DMNEW(s4 , cd->maxlocals * 5);
+       
+       new = m->stack;
+       loops = 0;
+       m->basicblocks[0].flags = BBREACHED;
+       m->basicblocks[0].instack = 0;
+       m->basicblocks[0].indepth = 0;
 
-*******************************************************************************/
+       for (i = 0; i < cd->exceptiontablelength; i++) {
+               bptr = &m->basicblocks[m->basicblockindex[cd->exceptiontable[i].handlerpc]];
+               bptr->flags = BBREACHED;
+               bptr->type = BBTYPE_EXH;
+               bptr->instack = new;
+               bptr->indepth = 1;
+               bptr->predecessorcount = CFG_UNKNOWN_PREDECESSORS;
+               STACKRESET;
+               NEWXSTACK;
+       }
 
-#if !defined(NDEBUG)
-static void stack_print_stack(codegendata *cd, stackptr s)
-{
-       int i, j;
-       stackptr t;
+       do {
+               loops++;
+               b_count = m->basicblockcount;
+               bptr = m->basicblocks;
+               superblockend = true;
+               repeat = false;
+               STACKRESET;
+               deadcode = true;
 
-       i = cd->maxstack;
-       t = s;
-       
-       while (t) {
-               i--;
-               t = t->prev;
-       }
-       j = cd->maxstack - i;
-       while (--i >= 0)
-               printf("    ");
-
-       while (s) {
-               j--;
-               if (s->flags & SAVEDVAR)
-                       switch (s->varkind) {
-                       case TEMPVAR:
-                               if (s->flags & INMEMORY)
-                                       printf(" M%02d", s->regoff);
-#ifdef HAS_ADDRESS_REGISTER_FILE
-                               else if (s->type == TYPE_ADR)
-                                       printf(" R%02d", s->regoff);
-#endif
-                               else if (IS_FLT_DBL_TYPE(s->type))
-                                       printf(" F%02d", s->regoff);
-                               else {
-#if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
-                                       if (IS_2_WORD_TYPE(s->type)) {
-# if defined(ENABLE_JIT) && defined(ENABLE_DISASSEMBLER)
-#  if defined(ENABLE_INTRP)
-                                               if (opt_intrp)
-                                                       printf(" %3d/%3d", GET_LOW_REG(s->regoff),
-                                                                  GET_HIGH_REG(s->regoff));
-                                               else
-#  endif
-                                                       printf(" %3s/%3s", regs[GET_LOW_REG(s->regoff)],
-                                                                  regs[GET_HIGH_REG(s->regoff)]);
-# else
-                                               printf(" %3d/%3d", GET_LOW_REG(s->regoff),
-                                                          GET_HIGH_REG(s->regoff));
-# endif
-                                       } 
-                                       else 
-#endif /* defined(SUPPORT_COMBINE_INTEGER_REGISTERS) */
-                                               {
-#if defined(ENABLE_JIT) && defined(ENABLE_DISASSEMBLER)
-# if defined(ENABLE_INTRP)
-                                                       if (opt_intrp)
-                                                               printf(" %3d", s->regoff);
-                                                       else
-# endif
-                                                               printf(" %3s", regs[s->regoff]);
-#else
-                                                       printf(" %3d", s->regoff);
-#endif
-                                               }
-                               }
-                               break;
-                       case STACKVAR:
-                               printf(" I%02d", s->varnum);
-                               break;
-                       case LOCALVAR:
-                               printf(" L%02d", s->varnum);
-                               break;
-                       case ARGVAR:
-                               if (s->varnum == -1) {
-                                       /* Return Value                                  */
-                                       /* varkind ARGVAR "misused for this special case */
-                                       printf("  V0");
+               while (--b_count >= 0) {
+                       if (bptr->flags == BBDELETED) {
+                               /* do nothing */
+                       } 
+                       else if (superblockend && (bptr->flags < BBREACHED)) {
+                               repeat = true;
+                       } 
+                       else if (bptr->flags <= BBREACHED) {
+                               if (superblockend) {
+                                       stackdepth = bptr->indepth;
+                               } 
+                               else if (bptr->flags < BBREACHED) {
+                                       COPYCURSTACK(copy);
+                                       bptr->instack = copy;
+                                       bptr->indepth = stackdepth;
                                } 
-                               else /* "normal" Argvar */
-                                       printf(" A%02d", s->varnum);
-                               break;
-                       default:
-                               printf(" !%02d", j);
-                       }
-               else
-                       switch (s->varkind) {
-                       case TEMPVAR:
-                               if (s->flags & INMEMORY)
-                                       printf(" m%02d", s->regoff);
-#ifdef HAS_ADDRESS_REGISTER_FILE
-                               else if (s->type == TYPE_ADR)
-                                       printf(" r%02d", s->regoff);
-#endif
-                               else if (IS_FLT_DBL_TYPE(s->type))
-                                       printf(" f%02d", s->regoff);
                                else {
-#if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
-                                       if (IS_2_WORD_TYPE(s->type)) {
-# if defined(ENABLE_JIT) && defined(ENABLE_DISASSEMBLER)
-#  if defined(ENABLE_INTRP)
-                                               if (opt_intrp)
-                                                       printf(" %3d/%3d", GET_LOW_REG(s->regoff),
-                                                                  GET_HIGH_REG(s->regoff));
-                                               else
-#  endif
-                                                       printf(" %3s/%3s", regs[GET_LOW_REG(s->regoff)],
-                                                                  regs[GET_HIGH_REG(s->regoff)]);
-# else
-                                               printf(" %3d/%3d", GET_LOW_REG(s->regoff),
-                                                          GET_HIGH_REG(s->regoff));
-# endif
-                                       } 
-                                       else
-#endif /* defined(SUPPORT_COMBINE_INTEGER_REGISTERS) */
-                                               {
-#if defined(ENABLE_JIT) && defined(ENABLE_DISASSEMBLER)
-# if defined(ENABLE_INTRP)
-                                                       if (opt_intrp)
-                                                               printf(" %3d", s->regoff);
-                                                       else
-# endif
-                                                               printf(" %3s", regs[s->regoff]);
-#else
-                                                       printf(" %3d", s->regoff);
-#endif
-                                               }
+                                       CHECK_STACK_DEPTH(bptr->indepth, stackdepth);
                                }
-                               break;
-                       case STACKVAR:
-                               printf(" i%02d", s->varnum);
-                               break;
-                       case LOCALVAR:
-                               printf(" l%02d", s->varnum);
-                               break;
-                       case ARGVAR:
-                               if (s->varnum == -1) {
-                                       /* Return Value                                  */
-                                       /* varkind ARGVAR "misused for this special case */
-                                       printf("  v0");
-                               } 
-                               else /* "normal" Argvar */
-                               printf(" a%02d", s->varnum);
-                               break;
-                       default:
-                               printf(" ?%02d", j);
-                       }
-               s = s->prev;
-       }
-}
-#endif /* !defined(NDEBUG) */
-
-
-#if 0
-static void print_reg(stackptr s) {
-       if (s) {
-               if (s->flags & SAVEDVAR)
-                       switch (s->varkind) {
-                       case TEMPVAR:
-                               if (s->flags & INMEMORY)
-                                       printf(" tm%02d", s->regoff);
-                               else
-                                       printf(" tr%02d", s->regoff);
-                               break;
-                       case STACKVAR:
-                               printf(" s %02d", s->varnum);
-                               break;
-                       case LOCALVAR:
-                               printf(" l %02d", s->varnum);
-                               break;
-                       case ARGVAR:
-                               printf(" a %02d", s->varnum);
-                               break;
-                       default:
-                               printf(" ! %02d", s->varnum);
-                       }
-               else
-                       switch (s->varkind) {
-                       case TEMPVAR:
-                               if (s->flags & INMEMORY)
-                                       printf(" Tm%02d", s->regoff);
-                               else
-                                       printf(" Tr%02d", s->regoff);
-                               break;
-                       case STACKVAR:
-                               printf(" S %02d", s->varnum);
-                               break;
-                       case LOCALVAR:
-                               printf(" L %02d", s->varnum);
-                               break;
-                       case ARGVAR:
-                               printf(" A %02d", s->varnum);
-                               break;
-                       default:
-                               printf(" ? %02d", s->varnum);
-                       }
-       }
-       else
-               printf("     ");
-               
-}
-#endif
 
+                               curstack = bptr->instack;
+                               deadcode = false;
+                               superblockend = false;
+                               bptr->flags = BBFINISHED;
+                               len = bptr->icount;
+                               iptr = bptr->iinstr;
+                               b_index = bptr - m->basicblocks;
 
-#if !defined(NDEBUG)
-static char *jit_type[] = {
-       "int",
-       "lng",
-       "flt",
-       "dbl",
-       "adr"
-};
-#endif
+                               last_pei = -1;
+                               last_dupx = -1;
+                               for( i = 0; i < cd->maxlocals; i++)
+                                       for( j = 0; j < 5; j++)
+                                               last_store[5 * i + j] = -1;
 
+                               bptr->stack = new;
 
-/* stack_show_method ***********************************************************
+                               while (--len >= 0)  {
+                                       opcode = iptr->opc;
 
-   Print the intermediate representation of a method.
+                                       /* check if ICMD opcode could throw an exception        */
+                                       /* and if so remember the instruction index in last_pei */
 
-   NOTE: Currently this function may only be called after register allocation!
+                                       if (op_data[opcode][PEI])
+                                               last_pei = bptr->icount - len - 1;
 
-*******************************************************************************/
+#if defined(USEBUILTINTABLE)
+# if defined(ENABLE_INTRP)
+                                       if (!opt_intrp) {
+# endif
+                                               /* check for opcodes to replace */
 
-#if !defined(NDEBUG)
-void stack_show_method(jitdata *jd)
-{
-       methodinfo     *m;
-       codeinfo       *code;
-       codegendata    *cd;
-       registerdata   *rd;
-       basicblock     *bptr;
-       exceptiontable *ex;
-       s4              i, j;
-       u1             *u1ptr;
+                                               bte = builtintable_get_automatic(opcode);
 
-       /* get required compiler data */
+                                               if (bte && bte->opcode == opcode) {
+                                                       iptr->opc   = ICMD_BUILTIN;
+                                                       iptr->op1   = false; /* don't check for exception */
+                                                       iptr->val.a = bte;
+                                                       jd->isleafmethod = false;
+                                                       goto builtin;
+                                               }
+# if defined(ENABLE_INTRP)
+                                       }
+# endif
+#endif /* defined(USEBUILTINTABLE) */
 
-       m    = jd->m;
-       code = jd->code;
-       cd   = jd->cd;
-       rd   = jd->rd;
+                                       /* Check for functions to replace with builtin
+                                          functions. */
 
-#if defined(USE_THREADS)
-       /* We need to enter a lock here, since the binutils disassembler
-          is not reentrant-able and we could not read functions printed
-          at the same time. */
+                                       if (builtintable_replace_function(iptr))
+                                               goto builtin;
 
-       builtin_monitorenter(lock_stack_show_icmd);
-#endif
+                                       /* this is the main switch */
 
-       printf("\n");
+                                       switch (opcode) {
 
-       method_println(m);
+                                               /* pop 0 push 0 */
 
-       printf("\nBasic blocks: %d\n", m->basicblockcount);
-       printf("Max locals:   %d\n", cd->maxlocals);
-       printf("Max stack:    %d\n", cd->maxstack);
-       printf("Line number table length: %d\n", m->linenumbercount);
+                                       case ICMD_CHECKNULL:
+                                               COUNT(count_check_null);
+                                       case ICMD_NOP:
+                                               SETDST;
+                                               break;
 
-       printf("Exceptions (Number: %d):\n", cd->exceptiontablelength);
-       for (ex = cd->exceptiontable; ex != NULL; ex = ex->down) {
-               printf("    L%03d ... ", ex->start->debug_nr );
-               printf("L%03d  = ", ex->end->debug_nr);
-               printf("L%03d", ex->handler->debug_nr);
-               printf("  (catchtype: ");
-               if (ex->catchtype.any)
-                       if (IS_CLASSREF(ex->catchtype))
-                               utf_display_classname(ex->catchtype.ref->name);
-                       else
-                               utf_display_classname(ex->catchtype.cls->name);
-               else
-                       printf("ANY");
-               printf(")\n");
-       }
-       
-       printf("Local Table:\n");
-       for (i = 0; i < cd->maxlocals; i++) {
-               printf("   %3d: ", i);
+                                       case ICMD_RET:
+#if defined(ENABLE_INTRP)
+                                               if (!opt_intrp)
+#endif
+                                                       rd->locals[iptr->op1][TYPE_ADR].type = TYPE_ADR;
+                                       case ICMD_RETURN:
+                                               COUNT(count_pcmd_return);
+                                               SETDST;
+                                               superblockend = true;
+                                               break;
 
-#if defined(ENABLE_JIT) && defined(ENABLE_DISASSEMBLER)
-               for (j = TYPE_INT; j <= TYPE_ADR; j++) {
-# if defined(ENABLE_INTRP)
-                       if (!opt_intrp) {
-# endif
-                               if (rd->locals[i][j].type >= 0) {
-                                       printf("   (%s) ", jit_type[j]);
-                                       if (rd->locals[i][j].flags & INMEMORY)
-                                               printf("m%2d", rd->locals[i][j].regoff);
-# ifdef HAS_ADDRESS_REGISTER_FILE
-                                       else if (j == TYPE_ADR)
-                                               printf("r%02d", rd->locals[i][j].regoff);
-# endif
-                                       else if ((j == TYPE_FLT) || (j == TYPE_DBL))
-                                               printf("f%02d", rd->locals[i][j].regoff);
-                                       else {
-# if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
-                                               if (IS_2_WORD_TYPE(j))
-                                                       printf(" %3s/%3s",
-                                                                  regs[GET_LOW_REG(rd->locals[i][j].regoff)],
-                                                                  regs[GET_HIGH_REG(rd->locals[i][j].regoff)]);
-                                               else
-# endif
-                                                       printf("%3s", regs[rd->locals[i][j].regoff]);
-                                       }
-                               }
+                                               /* pop 0 push 1 const */
+                                               
+                                       case ICMD_ICONST:
+                                               COUNT(count_pcmd_load);
+                                               if (len > 0) {
+                                                       switch (iptr[1].opc) {
+                                                       case ICMD_IADD:
+                                                               iptr[0].opc = ICMD_IADDCONST;
+                                                       icmd_iconst_tail:
+                                                               iptr[1].opc = ICMD_NOP;
+                                                               OP1_1(TYPE_INT, TYPE_INT);
+                                                               COUNT(count_pcmd_op);
+                                                               break;
+                                                       case ICMD_ISUB:
+                                                               iptr[0].opc = ICMD_ISUBCONST;
+                                                               goto icmd_iconst_tail;
+#if SUPPORT_CONST_MUL
+                                                       case ICMD_IMUL:
+                                                               iptr[0].opc = ICMD_IMULCONST;
+                                                               goto icmd_iconst_tail;
+#else /* SUPPORT_CONST_MUL */
+                                                       case ICMD_IMUL:
+                                                               if (iptr[0].val.i == 0x00000002)
+                                                                       iptr[0].val.i = 1;
+                                                               else if (iptr[0].val.i == 0x00000004)
+                                                                       iptr[0].val.i = 2;
+                                                               else if (iptr[0].val.i == 0x00000008)
+                                                                       iptr[0].val.i = 3;
+                                                               else if (iptr[0].val.i == 0x00000010)
+                                                                       iptr[0].val.i = 4;
+                                                               else if (iptr[0].val.i == 0x00000020)
+                                                                       iptr[0].val.i = 5;
+                                                               else if (iptr[0].val.i == 0x00000040)
+                                                                       iptr[0].val.i = 6;
+                                                               else if (iptr[0].val.i == 0x00000080)
+                                                                       iptr[0].val.i = 7;
+                                                               else if (iptr[0].val.i == 0x00000100)
+                                                                       iptr[0].val.i = 8;
+                                                               else if (iptr[0].val.i == 0x00000200)
+                                                                       iptr[0].val.i = 9;
+                                                               else if (iptr[0].val.i == 0x00000400)
+                                                                       iptr[0].val.i = 10;
+                                                               else if (iptr[0].val.i == 0x00000800)
+                                                                       iptr[0].val.i = 11;
+                                                               else if (iptr[0].val.i == 0x00001000)
+                                                                       iptr[0].val.i = 12;
+                                                               else if (iptr[0].val.i == 0x00002000)
+                                                                       iptr[0].val.i = 13;
+                                                               else if (iptr[0].val.i == 0x00004000)
+                                                                       iptr[0].val.i = 14;
+                                                               else if (iptr[0].val.i == 0x00008000)
+                                                                       iptr[0].val.i = 15;
+                                                               else if (iptr[0].val.i == 0x00010000)
+                                                                       iptr[0].val.i = 16;
+                                                               else if (iptr[0].val.i == 0x00020000)
+                                                                       iptr[0].val.i = 17;
+                                                               else if (iptr[0].val.i == 0x00040000)
+                                                                       iptr[0].val.i = 18;
+                                                               else if (iptr[0].val.i == 0x00080000)
+                                                                       iptr[0].val.i = 19;
+                                                               else if (iptr[0].val.i == 0x00100000)
+                                                                       iptr[0].val.i = 20;
+                                                               else if (iptr[0].val.i == 0x00200000)
+                                                                       iptr[0].val.i = 21;
+                                                               else if (iptr[0].val.i == 0x00400000)
+                                                                       iptr[0].val.i = 22;
+                                                               else if (iptr[0].val.i == 0x00800000)
+                                                                       iptr[0].val.i = 23;
+                                                               else if (iptr[0].val.i == 0x01000000)
+                                                                       iptr[0].val.i = 24;
+                                                               else if (iptr[0].val.i == 0x02000000)
+                                                                       iptr[0].val.i = 25;
+                                                               else if (iptr[0].val.i == 0x04000000)
+                                                                       iptr[0].val.i = 26;
+                                                               else if (iptr[0].val.i == 0x08000000)
+                                                                       iptr[0].val.i = 27;
+                                                               else if (iptr[0].val.i == 0x10000000)
+                                                                       iptr[0].val.i = 28;
+                                                               else if (iptr[0].val.i == 0x20000000)
+                                                                       iptr[0].val.i = 29;
+                                                               else if (iptr[0].val.i == 0x40000000)
+                                                                       iptr[0].val.i = 30;
+                                                               else if (iptr[0].val.i == 0x80000000)
+                                                                       iptr[0].val.i = 31;
+                                                               else {
+                                                                       PUSHCONST(TYPE_INT);
+                                                                       break;
+                                                               }
+                                                               iptr[0].opc = ICMD_IMULPOW2;
+                                                               goto icmd_iconst_tail;
+#endif /* SUPPORT_CONST_MUL */
+                                                       case ICMD_IDIV:
+                                                               if (iptr[0].val.i == 0x00000002)
+                                                                       iptr[0].val.i = 1;
+                                                               else if (iptr[0].val.i == 0x00000004)
+                                                                       iptr[0].val.i = 2;
+                                                               else if (iptr[0].val.i == 0x00000008)
+                                                                       iptr[0].val.i = 3;
+                                                               else if (iptr[0].val.i == 0x00000010)
+                                                                       iptr[0].val.i = 4;
+                                                               else if (iptr[0].val.i == 0x00000020)
+                                                                       iptr[0].val.i = 5;
+                                                               else if (iptr[0].val.i == 0x00000040)
+                                                                       iptr[0].val.i = 6;
+                                                               else if (iptr[0].val.i == 0x00000080)
+                                                                       iptr[0].val.i = 7;
+                                                               else if (iptr[0].val.i == 0x00000100)
+                                                                       iptr[0].val.i = 8;
+                                                               else if (iptr[0].val.i == 0x00000200)
+                                                                       iptr[0].val.i = 9;
+                                                               else if (iptr[0].val.i == 0x00000400)
+                                                                       iptr[0].val.i = 10;
+                                                               else if (iptr[0].val.i == 0x00000800)
+                                                                       iptr[0].val.i = 11;
+                                                               else if (iptr[0].val.i == 0x00001000)
+                                                                       iptr[0].val.i = 12;
+                                                               else if (iptr[0].val.i == 0x00002000)
+                                                                       iptr[0].val.i = 13;
+                                                               else if (iptr[0].val.i == 0x00004000)
+                                                                       iptr[0].val.i = 14;
+                                                               else if (iptr[0].val.i == 0x00008000)
+                                                                       iptr[0].val.i = 15;
+                                                               else if (iptr[0].val.i == 0x00010000)
+                                                                       iptr[0].val.i = 16;
+                                                               else if (iptr[0].val.i == 0x00020000)
+                                                                       iptr[0].val.i = 17;
+                                                               else if (iptr[0].val.i == 0x00040000)
+                                                                       iptr[0].val.i = 18;
+                                                               else if (iptr[0].val.i == 0x00080000)
+                                                                       iptr[0].val.i = 19;
+                                                               else if (iptr[0].val.i == 0x00100000)
+                                                                       iptr[0].val.i = 20;
+                                                               else if (iptr[0].val.i == 0x00200000)
+                                                                       iptr[0].val.i = 21;
+                                                               else if (iptr[0].val.i == 0x00400000)
+                                                                       iptr[0].val.i = 22;
+                                                               else if (iptr[0].val.i == 0x00800000)
+                                                                       iptr[0].val.i = 23;
+                                                               else if (iptr[0].val.i == 0x01000000)
+                                                                       iptr[0].val.i = 24;
+                                                               else if (iptr[0].val.i == 0x02000000)
+                                                                       iptr[0].val.i = 25;
+                                                               else if (iptr[0].val.i == 0x04000000)
+                                                                       iptr[0].val.i = 26;
+                                                               else if (iptr[0].val.i == 0x08000000)
+                                                                       iptr[0].val.i = 27;
+                                                               else if (iptr[0].val.i == 0x10000000)
+                                                                       iptr[0].val.i = 28;
+                                                               else if (iptr[0].val.i == 0x20000000)
+                                                                       iptr[0].val.i = 29;
+                                                               else if (iptr[0].val.i == 0x40000000)
+                                                                       iptr[0].val.i = 30;
+                                                               else if (iptr[0].val.i == 0x80000000)
+                                                                       iptr[0].val.i = 31;
+                                                               else {
+                                                                       PUSHCONST(TYPE_INT);
+                                                                       break;
+                                                               }
+                                                               iptr[0].opc = ICMD_IDIVPOW2;
+                                                               goto icmd_iconst_tail;
+                                                       case ICMD_IREM:
+                                                               /*log_text("stack.c: ICMD_ICONST/ICMD_IREM");*/
+                                                               if ((iptr[0].val.i == 0x00000002) ||
+                                                                       (iptr[0].val.i == 0x00000004) ||
+                                                                       (iptr[0].val.i == 0x00000008) ||
+                                                                       (iptr[0].val.i == 0x00000010) ||
+                                                                       (iptr[0].val.i == 0x00000020) ||
+                                                                       (iptr[0].val.i == 0x00000040) ||
+                                                                       (iptr[0].val.i == 0x00000080) ||
+                                                                       (iptr[0].val.i == 0x00000100) ||
+                                                                       (iptr[0].val.i == 0x00000200) ||
+                                                                       (iptr[0].val.i == 0x00000400) ||
+                                                                       (iptr[0].val.i == 0x00000800) ||
+                                                                       (iptr[0].val.i == 0x00001000) ||
+                                                                       (iptr[0].val.i == 0x00002000) ||
+                                                                       (iptr[0].val.i == 0x00004000) ||
+                                                                       (iptr[0].val.i == 0x00008000) ||
+                                                                       (iptr[0].val.i == 0x00010000) ||
+                                                                       (iptr[0].val.i == 0x00020000) ||
+                                                                       (iptr[0].val.i == 0x00040000) ||
+                                                                       (iptr[0].val.i == 0x00080000) ||
+                                                                       (iptr[0].val.i == 0x00100000) ||
+                                                                       (iptr[0].val.i == 0x00200000) ||
+                                                                       (iptr[0].val.i == 0x00400000) ||
+                                                                       (iptr[0].val.i == 0x00800000) ||
+                                                                       (iptr[0].val.i == 0x01000000) ||
+                                                                       (iptr[0].val.i == 0x02000000) ||
+                                                                       (iptr[0].val.i == 0x04000000) ||
+                                                                       (iptr[0].val.i == 0x08000000) ||
+                                                                       (iptr[0].val.i == 0x10000000) ||
+                                                                       (iptr[0].val.i == 0x20000000) ||
+                                                                       (iptr[0].val.i == 0x40000000) ||
+                                                                       (iptr[0].val.i == 0x80000000)) {
+                                                                       iptr[0].opc = ICMD_IREMPOW2;
+                                                                       iptr[0].val.i -= 1;
+                                                                       goto icmd_iconst_tail;
+                                                               }
+                                                               PUSHCONST(TYPE_INT);
+                                                               break;
+#if SUPPORT_CONST_LOGICAL
+                                                       case ICMD_IAND:
+                                                               iptr[0].opc = ICMD_IANDCONST;
+                                                               goto icmd_iconst_tail;
+                                                       case ICMD_IOR:
+                                                               iptr[0].opc = ICMD_IORCONST;
+                                                               goto icmd_iconst_tail;
+                                                       case ICMD_IXOR:
+                                                               iptr[0].opc = ICMD_IXORCONST;
+                                                               goto icmd_iconst_tail;
+#endif /* SUPPORT_CONST_LOGICAL */
+                                                       case ICMD_ISHL:
+                                                               iptr[0].opc = ICMD_ISHLCONST;
+                                                               goto icmd_iconst_tail;
+                                                       case ICMD_ISHR:
+                                                               iptr[0].opc = ICMD_ISHRCONST;
+                                                               goto icmd_iconst_tail;
+                                                       case ICMD_IUSHR:
+                                                               iptr[0].opc = ICMD_IUSHRCONST;
+                                                               goto icmd_iconst_tail;
+#if SUPPORT_LONG_SHIFT
+                                                       case ICMD_LSHL:
+                                                               iptr[0].opc = ICMD_LSHLCONST;
+                                                               goto icmd_lconst_tail;
+                                                       case ICMD_LSHR:
+                                                               iptr[0].opc = ICMD_LSHRCONST;
+                                                               goto icmd_lconst_tail;
+                                                       case ICMD_LUSHR:
+                                                               iptr[0].opc = ICMD_LUSHRCONST;
+                                                               goto icmd_lconst_tail;
+#endif /* SUPPORT_LONG_SHIFT */
+                                                       case ICMD_IF_ICMPEQ:
+                                                               iptr[1].opc = ICMD_IFEQ;
+                                                       icmd_if_icmp_tail:
+/*                                                             iptr[0].op1 = iptr[1].op1; */
+                                                               /* IF_ICMPxx is the last instruction in the  
+                                                                  basic block, just remove it. */
+                                                               iptr[0].opc = ICMD_NOP;
+                                                               iptr[1].val.i = iptr[0].val.i;
+                                                               SETDST;
+/*                                                             bptr->icount--; */
+/*                                                             len--; */
+#if 0
+                                                               OP1_0(TYPE_INT);
+                                                               tbptr = m->basicblocks +
+                                                                       m->basicblockindex[iptr[1].op1];
+
+                                                               iptr[1].target = (void *) tbptr;
+
+                                                               MARKREACHED(tbptr, copy);
+                                                               COUNT(count_pcmd_bra);
+#endif
+                                                               break;
+                                                       case ICMD_IF_ICMPLT:
+                                                               iptr[1].opc = ICMD_IFLT;
+                                                               goto icmd_if_icmp_tail;
+                                                       case ICMD_IF_ICMPLE:
+                                                               iptr[1].opc = ICMD_IFLE;
+                                                               goto icmd_if_icmp_tail;
+                                                       case ICMD_IF_ICMPNE:
+                                                               iptr[1].opc = ICMD_IFNE;
+                                                               goto icmd_if_icmp_tail;
+                                                       case ICMD_IF_ICMPGT:
+                                                               iptr[1].opc = ICMD_IFGT;
+                                                               goto icmd_if_icmp_tail;
+                                                       case ICMD_IF_ICMPGE:
+                                                               iptr[1].opc = ICMD_IFGE;
+                                                               goto icmd_if_icmp_tail;
+
+#if SUPPORT_CONST_STORE
+                                                       case ICMD_IASTORE:
+                                                       case ICMD_BASTORE:
+                                                       case ICMD_CASTORE:
+                                                       case ICMD_SASTORE:
+# if defined(ENABLE_INTRP)
+                                                               if (!opt_intrp) {
+# endif
+# if SUPPORT_CONST_STORE_ZERO_ONLY
+                                                                       if (iptr[0].val.i == 0) {
+# endif
+                                                                               switch (iptr[1].opc) {
+                                                                               case ICMD_IASTORE:
+                                                                                       iptr[0].opc = ICMD_IASTORECONST;
+                                                                                       break;
+                                                                               case ICMD_BASTORE:
+                                                                                       iptr[0].opc = ICMD_BASTORECONST;
+                                                                                       break;
+                                                                               case ICMD_CASTORE:
+                                                                                       iptr[0].opc = ICMD_CASTORECONST;
+                                                                                       break;
+                                                                               case ICMD_SASTORE:
+                                                                                       iptr[0].opc = ICMD_SASTORECONST;
+                                                                                       break;
+                                                                               }
+
+                                                                               iptr[1].opc = ICMD_NOP;
+                                                                               OPTT2_0(TYPE_INT, TYPE_ADR);
+                                                                               COUNT(count_pcmd_op);
+# if SUPPORT_CONST_STORE_ZERO_ONLY
+                                                                       } 
+                                                                       else
+                                                                               PUSHCONST(TYPE_INT);
+# endif
+# if defined(ENABLE_INTRP)
+                                                               } 
+                                                               else
+                                                                       PUSHCONST(TYPE_INT);
+# endif
+                                                               break;
+
+                                                       case ICMD_PUTSTATIC:
+                                                       case ICMD_PUTFIELD:
+# if defined(ENABLE_INTRP)
+                                                               if (!opt_intrp) {
+# endif
+# if SUPPORT_CONST_STORE_ZERO_ONLY
+                                                                       if (iptr[0].val.i == 0) {
+# endif
+                                                                               switch (iptr[1].opc) {
+                                                                               case ICMD_PUTSTATIC:
+                                                                                       iptr[0].opc = ICMD_PUTSTATICCONST;
+                                                                                       SETDST;
+                                                                                       break;
+                                                                               case ICMD_PUTFIELD:
+                                                                                       iptr[0].opc = ICMD_PUTFIELDCONST;
+                                                                                       OP1_0(TYPE_ADR);
+                                                                                       break;
+                                                                               }
+
+                                                                               iptr[1].opc = ICMD_NOP;
+                                                                               iptr[0].op1 = TYPE_INT;
+                                                                               COUNT(count_pcmd_op);
+# if SUPPORT_CONST_STORE_ZERO_ONLY
+                                                                       } 
+                                                                       else
+                                                                               PUSHCONST(TYPE_INT);
+# endif
+# if defined(ENABLE_INTRP)
+                                                               } 
+                                                               else
+                                                                       PUSHCONST(TYPE_INT);
+# endif
+                                                               break;
+#endif /* SUPPORT_CONST_STORE */
+                                                       default:
+                                                               PUSHCONST(TYPE_INT);
+                                                       }
+                                               }
+                                               else
+                                                       PUSHCONST(TYPE_INT);
+                                               break;
+
+                                       case ICMD_LCONST:
+                                               COUNT(count_pcmd_load);
+                                               if (len > 0) {
+                                                       switch (iptr[1].opc) {
+#if SUPPORT_LONG_ADD
+                                                       case ICMD_LADD:
+                                                               iptr[0].opc = ICMD_LADDCONST;
+                                                       icmd_lconst_tail:
+                                                               iptr[1].opc = ICMD_NOP;
+                                                               OP1_1(TYPE_LNG,TYPE_LNG);
+                                                               COUNT(count_pcmd_op);
+                                                               break;
+                                                       case ICMD_LSUB:
+                                                               iptr[0].opc = ICMD_LSUBCONST;
+                                                               goto icmd_lconst_tail;
+#endif /* SUPPORT_LONG_ADD */
+#if SUPPORT_LONG_MUL && SUPPORT_CONST_MUL
+                                                       case ICMD_LMUL:
+                                                               iptr[0].opc = ICMD_LMULCONST;
+                                                               goto icmd_lconst_tail;
+#else /* SUPPORT_LONG_MUL && SUPPORT_CONST_MUL */
+# if SUPPORT_LONG_SHIFT
+                                                       case ICMD_LMUL:
+                                                               if (iptr[0].val.l == 0x00000002)
+                                                                       iptr[0].val.i = 1;
+                                                               else if (iptr[0].val.l == 0x00000004)
+                                                                       iptr[0].val.i = 2;
+                                                               else if (iptr[0].val.l == 0x00000008)
+                                                                       iptr[0].val.i = 3;
+                                                               else if (iptr[0].val.l == 0x00000010)
+                                                                       iptr[0].val.i = 4;
+                                                               else if (iptr[0].val.l == 0x00000020)
+                                                                       iptr[0].val.i = 5;
+                                                               else if (iptr[0].val.l == 0x00000040)
+                                                                       iptr[0].val.i = 6;
+                                                               else if (iptr[0].val.l == 0x00000080)
+                                                                       iptr[0].val.i = 7;
+                                                               else if (iptr[0].val.l == 0x00000100)
+                                                                       iptr[0].val.i = 8;
+                                                               else if (iptr[0].val.l == 0x00000200)
+                                                                       iptr[0].val.i = 9;
+                                                               else if (iptr[0].val.l == 0x00000400)
+                                                                       iptr[0].val.i = 10;
+                                                               else if (iptr[0].val.l == 0x00000800)
+                                                                       iptr[0].val.i = 11;
+                                                               else if (iptr[0].val.l == 0x00001000)
+                                                                       iptr[0].val.i = 12;
+                                                               else if (iptr[0].val.l == 0x00002000)
+                                                                       iptr[0].val.i = 13;
+                                                               else if (iptr[0].val.l == 0x00004000)
+                                                                       iptr[0].val.i = 14;
+                                                               else if (iptr[0].val.l == 0x00008000)
+                                                                       iptr[0].val.i = 15;
+                                                               else if (iptr[0].val.l == 0x00010000)
+                                                                       iptr[0].val.i = 16;
+                                                               else if (iptr[0].val.l == 0x00020000)
+                                                                       iptr[0].val.i = 17;
+                                                               else if (iptr[0].val.l == 0x00040000)
+                                                                       iptr[0].val.i = 18;
+                                                               else if (iptr[0].val.l == 0x00080000)
+                                                                       iptr[0].val.i = 19;
+                                                               else if (iptr[0].val.l == 0x00100000)
+                                                                       iptr[0].val.i = 20;
+                                                               else if (iptr[0].val.l == 0x00200000)
+                                                                       iptr[0].val.i = 21;
+                                                               else if (iptr[0].val.l == 0x00400000)
+                                                                       iptr[0].val.i = 22;
+                                                               else if (iptr[0].val.l == 0x00800000)
+                                                                       iptr[0].val.i = 23;
+                                                               else if (iptr[0].val.l == 0x01000000)
+                                                                       iptr[0].val.i = 24;
+                                                               else if (iptr[0].val.l == 0x02000000)
+                                                                       iptr[0].val.i = 25;
+                                                               else if (iptr[0].val.l == 0x04000000)
+                                                                       iptr[0].val.i = 26;
+                                                               else if (iptr[0].val.l == 0x08000000)
+                                                                       iptr[0].val.i = 27;
+                                                               else if (iptr[0].val.l == 0x10000000)
+                                                                       iptr[0].val.i = 28;
+                                                               else if (iptr[0].val.l == 0x20000000)
+                                                                       iptr[0].val.i = 29;
+                                                               else if (iptr[0].val.l == 0x40000000)
+                                                                       iptr[0].val.i = 30;
+                                                               else if (iptr[0].val.l == 0x80000000)
+                                                                       iptr[0].val.i = 31;
+                                                               else {
+                                                                       PUSHCONST(TYPE_LNG);
+                                                                       break;
+                                                               }
+                                                               iptr[0].opc = ICMD_LMULPOW2;
+                                                               goto icmd_lconst_tail;
+# endif /* SUPPORT_LONG_SHIFT */
+#endif /* SUPPORT_LONG_MUL && SUPPORT_CONST_MUL */
+
+#if SUPPORT_LONG_DIV_POW2
+                                                       case ICMD_LDIV:
+                                                               if (iptr[0].val.l == 0x00000002)
+                                                                       iptr[0].val.i = 1;
+                                                               else if (iptr[0].val.l == 0x00000004)
+                                                                       iptr[0].val.i = 2;
+                                                               else if (iptr[0].val.l == 0x00000008)
+                                                                       iptr[0].val.i = 3;
+                                                               else if (iptr[0].val.l == 0x00000010)
+                                                                       iptr[0].val.i = 4;
+                                                               else if (iptr[0].val.l == 0x00000020)
+                                                                       iptr[0].val.i = 5;
+                                                               else if (iptr[0].val.l == 0x00000040)
+                                                                       iptr[0].val.i = 6;
+                                                               else if (iptr[0].val.l == 0x00000080)
+                                                                       iptr[0].val.i = 7;
+                                                               else if (iptr[0].val.l == 0x00000100)
+                                                                       iptr[0].val.i = 8;
+                                                               else if (iptr[0].val.l == 0x00000200)
+                                                                       iptr[0].val.i = 9;
+                                                               else if (iptr[0].val.l == 0x00000400)
+                                                                       iptr[0].val.i = 10;
+                                                               else if (iptr[0].val.l == 0x00000800)
+                                                                       iptr[0].val.i = 11;
+                                                               else if (iptr[0].val.l == 0x00001000)
+                                                                       iptr[0].val.i = 12;
+                                                               else if (iptr[0].val.l == 0x00002000)
+                                                                       iptr[0].val.i = 13;
+                                                               else if (iptr[0].val.l == 0x00004000)
+                                                                       iptr[0].val.i = 14;
+                                                               else if (iptr[0].val.l == 0x00008000)
+                                                                       iptr[0].val.i = 15;
+                                                               else if (iptr[0].val.l == 0x00010000)
+                                                                       iptr[0].val.i = 16;
+                                                               else if (iptr[0].val.l == 0x00020000)
+                                                                       iptr[0].val.i = 17;
+                                                               else if (iptr[0].val.l == 0x00040000)
+                                                                       iptr[0].val.i = 18;
+                                                               else if (iptr[0].val.l == 0x00080000)
+                                                                       iptr[0].val.i = 19;
+                                                               else if (iptr[0].val.l == 0x00100000)
+                                                                       iptr[0].val.i = 20;
+                                                               else if (iptr[0].val.l == 0x00200000)
+                                                                       iptr[0].val.i = 21;
+                                                               else if (iptr[0].val.l == 0x00400000)
+                                                                       iptr[0].val.i = 22;
+                                                               else if (iptr[0].val.l == 0x00800000)
+                                                                       iptr[0].val.i = 23;
+                                                               else if (iptr[0].val.l == 0x01000000)
+                                                                       iptr[0].val.i = 24;
+                                                               else if (iptr[0].val.l == 0x02000000)
+                                                                       iptr[0].val.i = 25;
+                                                               else if (iptr[0].val.l == 0x04000000)
+                                                                       iptr[0].val.i = 26;
+                                                               else if (iptr[0].val.l == 0x08000000)
+                                                                       iptr[0].val.i = 27;
+                                                               else if (iptr[0].val.l == 0x10000000)
+                                                                       iptr[0].val.i = 28;
+                                                               else if (iptr[0].val.l == 0x20000000)
+                                                                       iptr[0].val.i = 29;
+                                                               else if (iptr[0].val.l == 0x40000000)
+                                                                       iptr[0].val.i = 30;
+                                                               else if (iptr[0].val.l == 0x80000000)
+                                                                       iptr[0].val.i = 31;
+                                                               else {
+                                                                       PUSHCONST(TYPE_LNG);
+                                                                       break;
+                                                               }
+                                                               iptr[0].opc = ICMD_LDIVPOW2;
+                                                               goto icmd_lconst_tail;
+#endif /* SUPPORT_LONG_DIV_POW2 */
+
+#if SUPPORT_LONG_REM_POW2
+                                                       case ICMD_LREM:
+                                                               if ((iptr[0].val.l == 0x00000002) ||
+                                                                       (iptr[0].val.l == 0x00000004) ||
+                                                                       (iptr[0].val.l == 0x00000008) ||
+                                                                       (iptr[0].val.l == 0x00000010) ||
+                                                                       (iptr[0].val.l == 0x00000020) ||
+                                                                       (iptr[0].val.l == 0x00000040) ||
+                                                                       (iptr[0].val.l == 0x00000080) ||
+                                                                       (iptr[0].val.l == 0x00000100) ||
+                                                                       (iptr[0].val.l == 0x00000200) ||
+                                                                       (iptr[0].val.l == 0x00000400) ||
+                                                                       (iptr[0].val.l == 0x00000800) ||
+                                                                       (iptr[0].val.l == 0x00001000) ||
+                                                                       (iptr[0].val.l == 0x00002000) ||
+                                                                       (iptr[0].val.l == 0x00004000) ||
+                                                                       (iptr[0].val.l == 0x00008000) ||
+                                                                       (iptr[0].val.l == 0x00010000) ||
+                                                                       (iptr[0].val.l == 0x00020000) ||
+                                                                       (iptr[0].val.l == 0x00040000) ||
+                                                                       (iptr[0].val.l == 0x00080000) ||
+                                                                       (iptr[0].val.l == 0x00100000) ||
+                                                                       (iptr[0].val.l == 0x00200000) ||
+                                                                       (iptr[0].val.l == 0x00400000) ||
+                                                                       (iptr[0].val.l == 0x00800000) ||
+                                                                       (iptr[0].val.l == 0x01000000) ||
+                                                                       (iptr[0].val.l == 0x02000000) ||
+                                                                       (iptr[0].val.l == 0x04000000) ||
+                                                                       (iptr[0].val.l == 0x08000000) ||
+                                                                       (iptr[0].val.l == 0x10000000) ||
+                                                                       (iptr[0].val.l == 0x20000000) ||
+                                                                       (iptr[0].val.l == 0x40000000) ||
+                                                                       (iptr[0].val.l == 0x80000000)) {
+                                                                       iptr[0].opc = ICMD_LREMPOW2;
+                                                                       iptr[0].val.l -= 1;
+                                                                       goto icmd_lconst_tail;
+                                                               }
+                                                               PUSHCONST(TYPE_LNG);
+                                                               break;
+#endif /* SUPPORT_LONG_REM_POW2 */
+
+#if SUPPORT_LONG_LOGICAL && SUPPORT_CONST_LOGICAL
+
+                                                       case ICMD_LAND:
+                                                               iptr[0].opc = ICMD_LANDCONST;
+                                                               goto icmd_lconst_tail;
+                                                       case ICMD_LOR:
+                                                               iptr[0].opc = ICMD_LORCONST;
+                                                               goto icmd_lconst_tail;
+                                                       case ICMD_LXOR:
+                                                               iptr[0].opc = ICMD_LXORCONST;
+                                                               goto icmd_lconst_tail;
+#endif /* SUPPORT_LONG_LOGICAL && SUPPORT_CONST_LOGICAL */
+
+#if SUPPORT_LONG_CMP_CONST
+                                                       case ICMD_LCMP:
+                                                               if ((len > 1) && (iptr[2].val.i == 0)) {
+                                                                       switch (iptr[2].opc) {
+                                                                       case ICMD_IFEQ:
+                                                                               iptr[0].opc = ICMD_IF_LEQ;
+                                                                       icmd_lconst_lcmp_tail:
+                                                                               iptr[0].op1 = iptr[2].op1;
+                                                                               iptr[1].opc = ICMD_NOP;
+                                                                               iptr[2].opc = ICMD_NOP;
+
+/*                                                                             bptr->icount -= 2; */
+/*                                                                             len -= 2; */
+
+                                                                               OP1_0(TYPE_LNG);
+                                                                               tbptr = m->basicblocks +
+                                                                                       m->basicblockindex[iptr[0].op1];
+
+                                                                               iptr[0].target = (void *) tbptr;
+
+                                                                               MARKREACHED(tbptr, copy);
+                                                                               COUNT(count_pcmd_bra);
+                                                                               COUNT(count_pcmd_op);
+                                                                               break;
+                                                                       case ICMD_IFNE:
+                                                                               iptr[0].opc = ICMD_IF_LNE;
+                                                                               goto icmd_lconst_lcmp_tail;
+                                                                       case ICMD_IFLT:
+                                                                               iptr[0].opc = ICMD_IF_LLT;
+                                                                               goto icmd_lconst_lcmp_tail;
+                                                                       case ICMD_IFGT:
+                                                                               iptr[0].opc = ICMD_IF_LGT;
+                                                                               goto icmd_lconst_lcmp_tail;
+                                                                       case ICMD_IFLE:
+                                                                               iptr[0].opc = ICMD_IF_LLE;
+                                                                               goto icmd_lconst_lcmp_tail;
+                                                                       case ICMD_IFGE:
+                                                                               iptr[0].opc = ICMD_IF_LGE;
+                                                                               goto icmd_lconst_lcmp_tail;
+                                                                       default:
+                                                                               PUSHCONST(TYPE_LNG);
+                                                                       } /* switch (iptr[2].opc) */
+                                                               } /* if (iptr[2].val.i == 0) */
+                                                               else
+                                                                       PUSHCONST(TYPE_LNG);
+                                                               break;
+#endif /* SUPPORT_LONG_CMP_CONST */
+
+#if SUPPORT_CONST_STORE
+                                                       case ICMD_LASTORE:
+# if defined(ENABLE_INTRP)
+                                                               if (!opt_intrp) {
+# endif
+# if SUPPORT_CONST_STORE_ZERO_ONLY
+                                                                       if (iptr[0].val.l == 0) {
+# endif
+                                                                               iptr[0].opc = ICMD_LASTORECONST;
+                                                                               iptr[1].opc = ICMD_NOP;
+                                                                               OPTT2_0(TYPE_INT, TYPE_ADR);
+                                                                               COUNT(count_pcmd_op);
+# if SUPPORT_CONST_STORE_ZERO_ONLY
+                                                                       } 
+                                                                       else
+                                                                               PUSHCONST(TYPE_LNG);
+# endif
+# if defined(ENABLE_INTRP)
+                                                               } 
+                                                               else
+                                                                       PUSHCONST(TYPE_LNG);
+# endif
+                                                               break;
+
+                                                       case ICMD_PUTSTATIC:
+                                                       case ICMD_PUTFIELD:
+# if defined(ENABLE_INTRP)
+                                                               if (!opt_intrp) {
+# endif
+# if SUPPORT_CONST_STORE_ZERO_ONLY
+                                                                       if (iptr[0].val.l == 0) {
+# endif
+                                                                               switch (iptr[1].opc) {
+                                                                               case ICMD_PUTSTATIC:
+                                                                                       iptr[0].opc = ICMD_PUTSTATICCONST;
+                                                                                       SETDST;
+                                                                                       break;
+                                                                               case ICMD_PUTFIELD:
+                                                                                       iptr[0].opc = ICMD_PUTFIELDCONST;
+                                                                                       OP1_0(TYPE_ADR);
+                                                                                       break;
+                                                                               }
+
+                                                                               iptr[1].opc = ICMD_NOP;
+                                                                               iptr[0].op1 = TYPE_LNG;
+                                                                               COUNT(count_pcmd_op);
+# if SUPPORT_CONST_STORE_ZERO_ONLY
+                                                                       } 
+                                                                       else
+                                                                               PUSHCONST(TYPE_LNG);
+# endif
+# if defined(ENABLE_INTRP)
+                                                               } 
+                                                               else
+                                                                       PUSHCONST(TYPE_LNG);
+# endif
+                                                               break;
+#endif /* SUPPORT_CONST_STORE */
+                                                       default:
+                                                               PUSHCONST(TYPE_LNG);
+                                                       }
+                                               }
+                                               else
+                                                       PUSHCONST(TYPE_LNG);
+                                               break;
+
+                                       case ICMD_FCONST:
+                                               COUNT(count_pcmd_load);
+                                               PUSHCONST(TYPE_FLT);
+                                               break;
+
+                                       case ICMD_DCONST:
+                                               COUNT(count_pcmd_load);
+                                               PUSHCONST(TYPE_DBL);
+                                               break;
+
+                                       case ICMD_ACONST:
+                                               COUNT(count_pcmd_load);
+#if SUPPORT_CONST_STORE
+# if defined(ENABLE_INTRP)
+                                               if (!opt_intrp) {
+# endif
+                                                       /* We can only optimize if the ACONST is resolved
+                                                        * and there is an instruction after it. */
+
+                                                       if ((len > 0) && INSTRUCTION_IS_RESOLVED(iptr))
+                                                       {
+                                                               switch (iptr[1].opc) {
+                                                               case ICMD_AASTORE:
+                                                                       /* We can only optimize for NULL values
+                                                                        * here because otherwise a checkcast is
+                                                                        * required. */
+                                                                       if (iptr->val.a != NULL)
+                                                                               goto aconst_no_transform;
+
+                                                                       iptr[0].opc = ICMD_AASTORECONST;
+                                                                       OPTT2_0(TYPE_INT, TYPE_ADR);
+
+                                                                       iptr[1].opc = ICMD_NOP;
+                                                                       COUNT(count_pcmd_op);
+                                                                       break;
+
+                                                               case ICMD_PUTSTATIC:
+                                                               case ICMD_PUTFIELD:
+# if SUPPORT_CONST_STORE_ZERO_ONLY
+                                                                       if (iptr->val.a == 0) {
+# endif
+
+                                                                               switch (iptr[1].opc) {
+                                                                               case ICMD_PUTSTATIC:
+                                                                                       iptr[0].opc = ICMD_PUTSTATICCONST;
+                                                                                       iptr[0].op1 = TYPE_ADR;
+                                                                                       SETDST;
+                                                                                       break;
+                                                                               case ICMD_PUTFIELD:
+                                                                                       iptr[0].opc = ICMD_PUTFIELDCONST;
+                                                                                       iptr[0].op1 = TYPE_ADR;
+                                                                                       OP1_0(TYPE_ADR);
+                                                                                       break;
+                                                                               }
+
+                                                                               iptr[1].opc = ICMD_NOP;
+                                                                               COUNT(count_pcmd_op);
+
+# if SUPPORT_CONST_STORE_ZERO_ONLY
+                                                                       }
+                                                                       else
+                                                                               /* no transformation */
+                                                                               PUSHCONST(TYPE_ADR);
+# endif
+                                                                       break;
+
+                                                               default:
+                                                               aconst_no_transform:
+                                                                       /* no transformation */
+                                                                       PUSHCONST(TYPE_ADR);
+                                                               }
+                                                       }
+                                                       else {
+                                                               /* no transformation */
+                                                               PUSHCONST(TYPE_ADR);
+                                                       }
+# if defined(ENABLE_INTRP)
+                                               }
+                                               else
+                                                       PUSHCONST(TYPE_ADR);
+# endif
+#else /* SUPPORT_CONST_STORE */
+                                               PUSHCONST(TYPE_ADR);
+#endif /* SUPPORT_CONST_STORE */
+                                               break;
+
+                                               /* pop 0 push 1 load */
+                                               
+                                       case ICMD_ILOAD:
+                                       case ICMD_LLOAD:
+                                       case ICMD_FLOAD:
+                                       case ICMD_DLOAD:
+                                       case ICMD_ALOAD:
+                                               COUNT(count_load_instruction);
+                                               i = opcode - ICMD_ILOAD;
+#if defined(ENABLE_INTRP)
+                                               if (!opt_intrp)
+#endif
+                                                       rd->locals[iptr->op1][i].type = i;
+                                               LOAD(i, LOCALVAR, iptr->op1);
+                                               break;
+
+                                               /* pop 2 push 1 */
+
+                                       case ICMD_LALOAD:
+                                       case ICMD_IALOAD:
+                                       case ICMD_FALOAD:
+                                       case ICMD_DALOAD:
+                                       case ICMD_AALOAD:
+                                               COUNT(count_check_null);
+                                               COUNT(count_check_bound);
+                                               COUNT(count_pcmd_mem);
+                                               OP2IAT_1(opcode - ICMD_IALOAD);
+                                               break;
+
+                                       case ICMD_BALOAD:
+                                       case ICMD_CALOAD:
+                                       case ICMD_SALOAD:
+                                               COUNT(count_check_null);
+                                               COUNT(count_check_bound);
+                                               COUNT(count_pcmd_mem);
+                                               OP2IAT_1(TYPE_INT);
+                                               break;
+
+                                               /* pop 0 push 0 iinc */
+
+                                       case ICMD_IINC:
+#if defined(ENABLE_STATISTICS)
+                                               if (opt_stat) {
+                                                       i = stackdepth;
+                                                       if (i >= 10)
+                                                               count_store_depth[10]++;
+                                                       else
+                                                               count_store_depth[i]++;
+                                               }
+#endif
+                                               last_store[5 * iptr->op1 + TYPE_INT] = bptr->icount - len - 1;
+
+                                               copy = curstack;
+                                               i = stackdepth - 1;
+                                               while (copy) {
+                                                       if ((copy->varkind == LOCALVAR) &&
+                                                               (copy->varnum == iptr->op1)) {
+                                                               copy->varkind = TEMPVAR;
+                                                               copy->varnum = i;
+                                                       }
+                                                       i--;
+                                                       copy = copy->prev;
+                                               }
+                                               
+                                               SETDST;
+                                               break;
+
+                                               /* pop 1 push 0 store */
+
+                                       case ICMD_ISTORE:
+                                       case ICMD_LSTORE:
+                                       case ICMD_FSTORE:
+                                       case ICMD_DSTORE:
+                                       case ICMD_ASTORE:
+                                               REQUIRE_1;
+
+                                       i = opcode - ICMD_ISTORE;
+#if defined(ENABLE_INTRP)
+                                               if (!opt_intrp)
+#endif
+                                                       rd->locals[iptr->op1][i].type = i;
+#if defined(ENABLE_STATISTICS)
+                                       if (opt_stat) {
+                                               count_pcmd_store++;
+                                               i = new - curstack;
+                                               if (i >= 20)
+                                                       count_store_length[20]++;
+                                               else
+                                                       count_store_length[i]++;
+                                               i = stackdepth - 1;
+                                               if (i >= 10)
+                                                       count_store_depth[10]++;
+                                               else
+                                                       count_store_depth[i]++;
+                                       }
+#endif
+                                       /* check for conflicts as described in Figure 5.2 */
+                                       copy = curstack->prev;
+                                       i = stackdepth - 2;
+                                       while (copy) {
+                                               if ((copy->varkind == LOCALVAR) &&
+                                                       (copy->varnum == iptr->op1)) {
+                                                       copy->varkind = TEMPVAR;
+                                                       copy->varnum = i;
+                                               }
+                                               i--;
+                                               copy = copy->prev;
+                                       }
+
+                                       /* do not change instack Stackslots */
+                                       /* it won't improve performance if we copy the interface */
+                                       /* at the BB begin or here, and lsra relies that no      */
+                                       /* instack stackslot is marked LOCALVAR */
+                                       if (curstack->varkind == STACKVAR)
+                                               goto _possible_conflict;
+
+                                       /* check for a DUPX,SWAP while the lifetime of curstack */
+                                       /* and as creator curstack */
+                                       if (last_dupx != -1) { 
+                                               /* we have to look at the dst stack of DUPX */
+                                               /* == src Stack of PEI */
+                                               copy = bptr->iinstr[last_dupx].dst;
+                                               /*
+                                               if (last_pei == 0)
+                                                       copy = bptr->instack;
+                                               else
+                                                       copy = bptr->iinstr[last_pei-1].dst;
+                                               */
+                                               if ((copy != NULL) && (curstack <= copy)) {
+                                                       /* curstack alive at or created by DUPX */
+
+                                                       /* TODO:.... */
+                                                       /* now look, if there is a LOCALVAR at anyone of */
+                                                       /* the src stacklots used by DUPX */
+
+                                                       goto _possible_conflict;
+                                               }
+                                       }
+
+                                       /* check for a PEI while the lifetime of curstack */
+                                       if (last_pei != -1) { 
+                                               /* && there are exception handler in this method */
+                                               /* when this is checked prevent ARGVAR from      */
+                                               /* overwriting LOCALVAR!!! */
+
+                                               /* we have to look at the stack _before_ the PEI! */
+                                               /* == src Stack of PEI */
+                                               if (last_pei == 0)
+                                                       copy = bptr->instack;
+                                               else
+                                                       copy = bptr->iinstr[last_pei-1].dst;
+                                               if ((copy != NULL) && (curstack <= copy)) {
+                                                       /* curstack alive at PEI */
+                                                       goto _possible_conflict;
+                                               }
+                                       }
+                                       
+                                       /* check if there is a possible conflicting XSTORE */
+                                       if (last_store[5 * iptr->op1 + opcode - ICMD_ISTORE] != -1) {
+                                               /* we have to look at the stack _before_ the XSTORE! */
+                                               /* == src Stack of XSTORE */
+                                               if (last_store[5 * iptr->op1 + opcode - ICMD_ISTORE] == 0)
+                                                       copy = bptr->instack;
+                                               else
+                                                       copy = bptr->iinstr[last_store[5 * iptr->op1 + opcode - ICMD_ISTORE] - 1].dst;
+                                               if ((copy != NULL) && (curstack <= copy)) {
+                                                       /* curstack alive at Last Store */
+                                                       goto _possible_conflict;
+                                               }
+                                       }
+
+                                       /* check if there is a conflict with a XLOAD */
+                                       /* this is done indirectly by looking if a Stackslot is */
+                                       /* marked LOCALVAR and is live while curstack is live   */
+                                       /* see figure 5.3 */
+
+                                       /* First check "above" stackslots of the instack */
+                                       copy = curstack + 1;
+                                       for(;(copy <= bptr->instack); copy++)
+                                               if ((copy->varkind == LOCALVAR) && (copy->varnum == iptr->op1)) {
+                                                       goto _possible_conflict;
+                                               }
+                                       
+                                       /* "intra" Basic Block Stackslots are allocated above    */
+                                       /* bptr->stack (see doc/stack.txt), so if curstack + 1   */
+                                       /* is an instack, copy could point now to the stackslots */
+                                       /* of an inbetween analysed Basic Block */
+                                       if (copy < bptr->stack)
+                                               copy = bptr->stack;
+                                       while (copy < new) {
+                                               if ((copy->varkind == LOCALVAR) && (copy->varnum == iptr->op1)) {
+                                                       goto _possible_conflict;
+                                               }
+                                               copy++;
+                                       }
+                                       /* If Stackslot is already marked as LOCALVAR, do not    */
+                                       /* change it! Conflict resolution works only, if xLOAD   */
+                                       /* has priority! */
+                                       if (curstack->varkind == LOCALVAR)
+                                               goto _possible_conflict;
+                                       /* no conflict - mark the Stackslot as LOCALVAR */
+                                       curstack->varkind = LOCALVAR;
+                                       curstack->varnum = iptr->op1;
+                                       
+                                       goto _local_join;
+                               _possible_conflict:
+                                       if ((curstack->varkind == LOCALVAR) 
+                                               && (curstack->varnum == iptr->op1)) {
+                                               curstack->varkind = TEMPVAR;
+                                               curstack->varnum = stackdepth-1;
+                                       }
+                               _local_join:
+                                       last_store[5 * iptr->op1 + opcode - ICMD_ISTORE] = bptr->icount - len - 1;
+
+                                       STORE(opcode - ICMD_ISTORE);
+                                       break;
+
+                                       /* pop 3 push 0 */
+
+                                       case ICMD_AASTORE:
+                                               COUNT(count_check_null);
+                                               COUNT(count_check_bound);
+                                               COUNT(count_pcmd_mem);
+
+                                               bte = builtintable_get_internal(BUILTIN_canstore);
+                                               md = bte->md;
+
+                                               if (md->memuse > rd->memuse)
+                                                       rd->memuse = md->memuse;
+                                               if (md->argintreguse > rd->argintreguse)
+                                                       rd->argintreguse = md->argintreguse;
+
+                                               /* make all stack variables saved */
+
+                                               copy = curstack;
+                                               while (copy) {
+                                                       copy->flags |= SAVEDVAR;
+                                                       copy = copy->prev;
+                                               }
+
+                                               OP3TIA_0(TYPE_ADR);
+                                               break;
+
+                                       case ICMD_IASTORE:
+                                       case ICMD_LASTORE:
+                                       case ICMD_FASTORE:
+                                       case ICMD_DASTORE:
+                                               COUNT(count_check_null);
+                                               COUNT(count_check_bound);
+                                               COUNT(count_pcmd_mem);
+                                               OP3TIA_0(opcode - ICMD_IASTORE);
+                                               break;
+
+                                       case ICMD_BASTORE:
+                                       case ICMD_CASTORE:
+                                       case ICMD_SASTORE:
+                                               COUNT(count_check_null);
+                                               COUNT(count_check_bound);
+                                               COUNT(count_pcmd_mem);
+                                               OP3TIA_0(TYPE_INT);
+                                               break;
+
+                                               /* pop 1 push 0 */
+
+                                       case ICMD_POP:
+#ifdef ENABLE_VERIFIER
+                                               if (opt_verify) {
+                                                       REQUIRE_1;
+                                                       if (IS_2_WORD_TYPE(curstack->type))
+                                                               goto throw_stack_category_error;
+                                               }
+#endif
+                                               OP1_0ANY;
+                                               break;
+
+                                       case ICMD_IRETURN:
+                                       case ICMD_LRETURN:
+                                       case ICMD_FRETURN:
+                                       case ICMD_DRETURN:
+                                       case ICMD_ARETURN:
+#if defined(ENABLE_JIT)
 # if defined(ENABLE_INTRP)
-                       }
+                                               if (!opt_intrp)
 # endif
-               }
-#endif /* defined(ENABLE_JIT) && defined(ENABLE_DISASSEMBLER) */
+                                                       md_return_alloc(jd, curstack);
+#endif
+                                               COUNT(count_pcmd_return);
+                                               OP1_0(opcode - ICMD_IRETURN);
+                                               superblockend = true;
+                                               break;
+
+                                       case ICMD_ATHROW:
+                                               COUNT(count_check_null);
+                                               OP1_0(TYPE_ADR);
+                                               STACKRESET;
+                                               SETDST;
+                                               superblockend = true;
+                                               break;
+
+                                       case ICMD_PUTSTATIC:
+                                               COUNT(count_pcmd_mem);
+                                               OP1_0(iptr->op1);
+                                               break;
+
+                                               /* pop 1 push 0 branch */
+
+                                       case ICMD_IFNULL:
+                                       case ICMD_IFNONNULL:
+                                               COUNT(count_pcmd_bra);
+                                               OP1_0(TYPE_ADR);
+                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
+
+                                               iptr[0].target = (void *) tbptr;
+
+                                               MARKREACHED(tbptr, copy);
+                                               break;
+
+                                       case ICMD_IFEQ:
+                                       case ICMD_IFNE:
+                                       case ICMD_IFLT:
+                                       case ICMD_IFGE:
+                                       case ICMD_IFGT:
+                                       case ICMD_IFLE:
+                                               COUNT(count_pcmd_bra);
+
+                                               /* iptr->val.i is set implicitly in parse by
+                                                  clearing the memory or from IF_ICMPxx
+                                                  optimization. */
+
+                                               OP1_0(TYPE_INT);
+/*                                             iptr->val.i = 0; */
+                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
+
+                                               iptr[0].target = (void *) tbptr;
+
+                                               MARKREACHED(tbptr, copy);
+                                               break;
+
+                                               /* pop 0 push 0 branch */
+
+                                       case ICMD_GOTO:
+                                               COUNT(count_pcmd_bra);
+                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
+
+                                               iptr[0].target = (void *) tbptr;
+
+                                               MARKREACHED(tbptr, copy);
+                                               SETDST;
+                                               superblockend = true;
+                                               break;
+
+                                               /* pop 1 push 0 table branch */
+
+                                       case ICMD_TABLESWITCH:
+                                               COUNT(count_pcmd_table);
+                                               OP1_0(TYPE_INT);
+                                               s4ptr = iptr->val.a;
+                                               tbptr = m->basicblocks + m->basicblockindex[*s4ptr++];
+                                               MARKREACHED(tbptr, copy);
+                                               i = *s4ptr++;                          /* low     */
+                                               i = *s4ptr++ - i + 1;                  /* high    */
 
-               printf("\n");
-       }
-       printf("\n");
+                                               tptr = DMNEW(void*, i+1);
+                                               iptr->target = (void *) tptr;
 
-#if defined(ENABLE_LSRA)
-       if (!opt_lsra) {
+                                               tptr[0] = (void *) tbptr;
+                                               tptr++;
+
+                                               while (--i >= 0) {
+                                                       tbptr = m->basicblocks + m->basicblockindex[*s4ptr++];
+
+                                                       tptr[0] = (void *) tbptr;
+                                                       tptr++;
+
+                                                       MARKREACHED(tbptr, copy);
+                                               }
+                                               SETDST;
+                                               superblockend = true;
+                                               break;
+                                                       
+                                               /* pop 1 push 0 table branch */
+
+                                       case ICMD_LOOKUPSWITCH:
+                                               COUNT(count_pcmd_table);
+                                               OP1_0(TYPE_INT);
+                                               s4ptr = iptr->val.a;
+                                               tbptr = m->basicblocks + m->basicblockindex[*s4ptr++];
+                                               MARKREACHED(tbptr, copy);
+                                               i = *s4ptr++;                          /* count   */
+
+                                               tptr = DMNEW(void*, i+1);
+                                               iptr->target = (void *) tptr;
+
+                                               tptr[0] = (void *) tbptr;
+                                               tptr++;
+
+                                               while (--i >= 0) {
+                                                       tbptr = m->basicblocks + m->basicblockindex[s4ptr[1]];
+
+                                                       tptr[0] = (void *) tbptr;
+                                                       tptr++;
+                                                               
+                                                       MARKREACHED(tbptr, copy);
+                                                       s4ptr += 2;
+                                               }
+                                               SETDST;
+                                               superblockend = true;
+                                               break;
+
+                                       case ICMD_MONITORENTER:
+                                               COUNT(count_check_null);
+                                       case ICMD_MONITOREXIT:
+                                               OP1_0(TYPE_ADR);
+                                               break;
+
+                                               /* pop 2 push 0 branch */
+
+                                       case ICMD_IF_ICMPEQ:
+                                       case ICMD_IF_ICMPNE:
+                                       case ICMD_IF_ICMPLT:
+                                       case ICMD_IF_ICMPGE:
+                                       case ICMD_IF_ICMPGT:
+                                       case ICMD_IF_ICMPLE:
+                                               COUNT(count_pcmd_bra);
+                                               OP2_0(TYPE_INT);
+                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
+                                                       
+                                               iptr[0].target = (void *) tbptr;
+
+                                               MARKREACHED(tbptr, copy);
+                                               break;
+
+                                       case ICMD_IF_ACMPEQ:
+                                       case ICMD_IF_ACMPNE:
+                                               COUNT(count_pcmd_bra);
+                                               OP2_0(TYPE_ADR);
+                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
+
+                                               iptr[0].target = (void *) tbptr;
+
+                                               MARKREACHED(tbptr, copy);
+                                               break;
+
+                                               /* pop 2 push 0 */
+
+                                       case ICMD_PUTFIELD:
+                                               COUNT(count_check_null);
+                                               COUNT(count_pcmd_mem);
+                                               OPTT2_0(iptr->op1,TYPE_ADR);
+                                               break;
+
+                                       case ICMD_POP2:
+                                               REQUIRE_1;
+                                               if (!IS_2_WORD_TYPE(curstack->type)) {
+                                                       /* ..., cat1 */
+#ifdef ENABLE_VERIFIER
+                                                       if (opt_verify) {
+                                                               REQUIRE_2;
+                                                               if (IS_2_WORD_TYPE(curstack->prev->type))
+                                                                       goto throw_stack_category_error;
+                                                       }
+#endif
+                                                       OP1_0ANY;                /* second pop */
+                                               }
+                                               else
+                                                       iptr->opc = ICMD_POP;
+                                               OP1_0ANY;
+                                               break;
+
+                                               /* pop 0 push 1 dup */
+                                               
+                                       case ICMD_DUP:
+#ifdef ENABLE_VERIFIER
+                                               if (opt_verify) {
+                                                       REQUIRE_1;
+                                                       if (IS_2_WORD_TYPE(curstack->type))
+                                                               goto throw_stack_category_error;
+                                               }
+#endif
+                                               last_dupx = bptr->icount - len - 1;
+                                               COUNT(count_dup_instruction);
+                                               DUP;
+                                               break;
+
+                                       case ICMD_DUP2:
+                                               last_dupx = bptr->icount - len - 1;
+                                               REQUIRE_1;
+                                               if (IS_2_WORD_TYPE(curstack->type)) {
+                                                       /* ..., cat2 */
+                                                       iptr->opc = ICMD_DUP;
+                                                       DUP;
+                                               }
+                                               else {
+                                                       REQUIRE_2;
+                                                       /* ..., ????, cat1 */
+#ifdef ENABLE_VERIFIER
+                                                       if (opt_verify) {
+                                                               if (IS_2_WORD_TYPE(curstack->prev->type))
+                                                                       goto throw_stack_category_error;
+                                                       }
+#endif
+                                                       copy = curstack;
+                                                       NEWSTACK(copy->prev->type, copy->prev->varkind,
+                                                                        copy->prev->varnum);
+                                                       NEWSTACK(copy->type, copy->varkind,
+                                                                        copy->varnum);
+                                                       SETDST;
+                                                       stackdepth += 2;
+                                               }
+                                               break;
+
+                                               /* pop 2 push 3 dup */
+                                               
+                                       case ICMD_DUP_X1:
+#ifdef ENABLE_VERIFIER
+                                               if (opt_verify) {
+                                                       REQUIRE_2;
+                                                       if (IS_2_WORD_TYPE(curstack->type) ||
+                                                               IS_2_WORD_TYPE(curstack->prev->type))
+                                                                       goto throw_stack_category_error;
+                                               }
+#endif
+                                               last_dupx = bptr->icount - len - 1;
+                                               DUP_X1;
+                                               break;
+
+                                       case ICMD_DUP2_X1:
+                                               last_dupx = bptr->icount - len - 1;
+                                               REQUIRE_2;
+                                               if (IS_2_WORD_TYPE(curstack->type)) {
+                                                       /* ..., ????, cat2 */
+#ifdef ENABLE_VERIFIER
+                                                       if (opt_verify) {
+                                                               if (IS_2_WORD_TYPE(curstack->prev->type))
+                                                                       goto throw_stack_category_error;
+                                                       }
+#endif
+                                                       iptr->opc = ICMD_DUP_X1;
+                                                       DUP_X1;
+                                               }
+                                               else {
+                                                       /* ..., ????, cat1 */
+#ifdef ENABLE_VERIFIER
+                                                       if (opt_verify) {
+                                                               REQUIRE_3;
+                                                               if (IS_2_WORD_TYPE(curstack->prev->type)
+                                                                       || IS_2_WORD_TYPE(curstack->prev->prev->type))
+                                                                               goto throw_stack_category_error;
+                                                       }
+#endif
+                                                       DUP2_X1;
+                                               }
+                                               break;
+
+                                               /* pop 3 push 4 dup */
+                                               
+                                       case ICMD_DUP_X2:
+                                               last_dupx = bptr->icount - len - 1;
+                                               REQUIRE_2;
+                                               if (IS_2_WORD_TYPE(curstack->prev->type)) {
+                                                       /* ..., cat2, ???? */
+#ifdef ENABLE_VERIFIER
+                                                       if (opt_verify) {
+                                                               if (IS_2_WORD_TYPE(curstack->type))
+                                                                       goto throw_stack_category_error;
+                                                       }
+#endif
+                                                       iptr->opc = ICMD_DUP_X1;
+                                                       DUP_X1;
+                                               }
+                                               else {
+                                                       /* ..., cat1, ???? */
+#ifdef ENABLE_VERIFIER
+                                                       if (opt_verify) {
+                                                               REQUIRE_3;
+                                                               if (IS_2_WORD_TYPE(curstack->type)
+                                                                       || IS_2_WORD_TYPE(curstack->prev->prev->type))
+                                                                                       goto throw_stack_category_error;
+                                                       }
+#endif
+                                                       DUP_X2;
+                                               }
+                                               break;
+
+                                       case ICMD_DUP2_X2:
+                                               last_dupx = bptr->icount - len - 1;
+                                               REQUIRE_2;
+                                               if (IS_2_WORD_TYPE(curstack->type)) {
+                                                       /* ..., ????, cat2 */
+                                                       if (IS_2_WORD_TYPE(curstack->prev->type)) {
+                                                               /* ..., cat2, cat2 */
+                                                               iptr->opc = ICMD_DUP_X1;
+                                                               DUP_X1;
+                                                       }
+                                                       else {
+                                                               /* ..., cat1, cat2 */
+#ifdef ENABLE_VERIFIER
+                                                               if (opt_verify) {
+                                                                       REQUIRE_3;
+                                                                       if (IS_2_WORD_TYPE(curstack->prev->prev->type))
+                                                                                       goto throw_stack_category_error;
+                                                               }
+#endif
+                                                               iptr->opc = ICMD_DUP_X2;
+                                                               DUP_X2;
+                                                       }
+                                               }
+                                               else {
+                                                       REQUIRE_3;
+                                                       /* ..., ????, ????, cat1 */
+                                                       if (IS_2_WORD_TYPE(curstack->prev->prev->type)) {
+                                                               /* ..., cat2, ????, cat1 */
+#ifdef ENABLE_VERIFIER
+                                                               if (opt_verify) {
+                                                                       if (IS_2_WORD_TYPE(curstack->prev->type))
+                                                                               goto throw_stack_category_error;
+                                                               }
 #endif
-#if defined(ENABLE_INTRP)
-               if (!opt_intrp) {
-#endif
-       printf("Interface Table:\n");
-       for (i = 0; i < cd->maxstack; i++) {
-               if ((rd->interfaces[i][0].type >= 0) ||
-                       (rd->interfaces[i][1].type >= 0) ||
-                   (rd->interfaces[i][2].type >= 0) ||
-                       (rd->interfaces[i][3].type >= 0) ||
-                   (rd->interfaces[i][4].type >= 0)) {
-                       printf("   %3d: ", i);
-
-#if defined(ENABLE_JIT) && defined(ENABLE_DISASSEMBLER)
-# if defined(ENABLE_INTRP)
-                       if (!opt_intrp) {
-# endif
-                               for (j = TYPE_INT; j <= TYPE_ADR; j++) {
-                                       if (rd->interfaces[i][j].type >= 0) {
-                                               printf("   (%s) ", jit_type[j]);
-                                               if (rd->interfaces[i][j].flags & SAVEDVAR) {
-                                                       if (rd->interfaces[i][j].flags & INMEMORY)
-                                                               printf("M%2d", rd->interfaces[i][j].regoff);
-#ifdef HAS_ADDRESS_REGISTER_FILE
-                                                       else if (j == TYPE_ADR)
-                                                               printf("R%02d", rd->interfaces[i][j].regoff);
-#endif
-                                                       else if ((j == TYPE_FLT) || (j == TYPE_DBL))
-                                                               printf("F%02d", rd->interfaces[i][j].regoff);
+                                                               iptr->opc = ICMD_DUP2_X1;
+                                                               DUP2_X1;
+                                                       }
                                                        else {
-#if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
-                                                               if (IS_2_WORD_TYPE(j))
-                                                                       printf(" %3s/%3s",
-                                                                                  regs[GET_LOW_REG(rd->interfaces[i][j].regoff)],
-                                                                                  regs[GET_HIGH_REG(rd->interfaces[i][j].regoff)]);
-                                                               else
+                                                               /* ..., cat1, ????, cat1 */
+#ifdef ENABLE_VERIFIER
+                                                               if (opt_verify) {
+                                                                       REQUIRE_4;
+                                                                       if (IS_2_WORD_TYPE(curstack->prev->type)
+                                                                               || IS_2_WORD_TYPE(curstack->prev->prev->prev->type))
+                                                                               goto throw_stack_category_error;
+                                                               }
 #endif
-                                                                       printf("%3s",regs[rd->interfaces[i][j].regoff]);
+                                                               DUP2_X2;
                                                        }
                                                }
-                                               else {
-                                                       if (rd->interfaces[i][j].flags & INMEMORY)
-                                                               printf("m%2d", rd->interfaces[i][j].regoff);
-#ifdef HAS_ADDRESS_REGISTER_FILE
-                                                       else if (j == TYPE_ADR)
-                                                               printf("r%02d", rd->interfaces[i][j].regoff);
-#endif
-                                                       else if ((j == TYPE_FLT) || (j == TYPE_DBL))
-                                                               printf("f%02d", rd->interfaces[i][j].regoff);
-                                                       else {
-#if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
-                                                               if (IS_2_WORD_TYPE(j))
-                                                                       printf(" %3s/%3s",
-                                                                                  regs[GET_LOW_REG(rd->interfaces[i][j].regoff)],
-                                                                                  regs[GET_HIGH_REG(rd->interfaces[i][j].regoff)]);
-                                                               else
+                                               break;
+
+                                               /* pop 2 push 2 swap */
+                                               
+                                       case ICMD_SWAP:
+                                               last_dupx = bptr->icount - len - 1;
+#ifdef ENABLE_VERIFIER
+                                               if (opt_verify) {
+                                                       REQUIRE_2;
+                                                       if (IS_2_WORD_TYPE(curstack->type)
+                                                               || IS_2_WORD_TYPE(curstack->prev->type))
+                                                               goto throw_stack_category_error;
+                                               }
 #endif
-                                                                       printf("%3s",regs[rd->interfaces[i][j].regoff]);
+                                               SWAP;
+                                               break;
+
+                                               /* pop 2 push 1 */
+
+                                       case ICMD_IDIV:
+                                       case ICMD_IREM:
+#if !SUPPORT_DIVISION
+                                               bte = (builtintable_entry *) iptr->val.a;
+                                               md = bte->md;
+                                               i = iptr->op1;
+
+                                               if (md->memuse > rd->memuse)
+                                                       rd->memuse = md->memuse;
+                                               if (md->argintreguse > rd->argintreguse)
+                                                       rd->argintreguse = md->argintreguse;
+
+                                               /* make all stack variables saved */
+
+                                               copy = curstack;
+                                               while (copy) {
+                                                       copy->flags |= SAVEDVAR;
+                                                       copy = copy->prev;
+                                               }
+
+                                               /* fall through */
+#endif /* !SUPPORT_DIVISION */
+
+                                       case ICMD_ISHL:
+                                       case ICMD_ISHR:
+                                       case ICMD_IUSHR:
+                                       case ICMD_IADD:
+                                       case ICMD_ISUB:
+                                       case ICMD_IMUL:
+                                       case ICMD_IAND:
+                                       case ICMD_IOR:
+                                       case ICMD_IXOR:
+                                               COUNT(count_pcmd_op);
+                                               OP2_1(TYPE_INT);
+                                               break;
+
+                                       case ICMD_LDIV:
+                                       case ICMD_LREM:
+#if !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV)
+                                               bte = (builtintable_entry *) iptr->val.a;
+                                               md = bte->md;
+                                               i = iptr->op1;
+
+                                               if (md->memuse > rd->memuse)
+                                                       rd->memuse = md->memuse;
+                                               if (md->argintreguse > rd->argintreguse)
+                                                       rd->argintreguse = md->argintreguse;
+
+                                               /* make all stack variables saved */
+
+                                               copy = curstack;
+                                               while (copy) {
+                                                       copy->flags |= SAVEDVAR;
+                                                       copy = copy->prev;
+                                               }
+
+                                               /* fall through */
+#endif /* !(SUPPORT_DIVISION && SUPPORT_LONG && SUPPORT_LONG_DIV) */
+
+                                       case ICMD_LMUL:
+                                       case ICMD_LADD:
+                                       case ICMD_LSUB:
+#if SUPPORT_LONG_LOGICAL
+                                       case ICMD_LAND:
+                                       case ICMD_LOR:
+                                       case ICMD_LXOR:
+#endif /* SUPPORT_LONG_LOGICAL */
+                                               COUNT(count_pcmd_op);
+                                               OP2_1(TYPE_LNG);
+                                               break;
+
+                                       case ICMD_LSHL:
+                                       case ICMD_LSHR:
+                                       case ICMD_LUSHR:
+                                               COUNT(count_pcmd_op);
+                                               OP2IT_1(TYPE_LNG);
+                                               break;
+
+                                       case ICMD_FADD:
+                                       case ICMD_FSUB:
+                                       case ICMD_FMUL:
+                                       case ICMD_FDIV:
+                                       case ICMD_FREM:
+                                               COUNT(count_pcmd_op);
+                                               OP2_1(TYPE_FLT);
+                                               break;
+
+                                       case ICMD_DADD:
+                                       case ICMD_DSUB:
+                                       case ICMD_DMUL:
+                                       case ICMD_DDIV:
+                                       case ICMD_DREM:
+                                               COUNT(count_pcmd_op);
+                                               OP2_1(TYPE_DBL);
+                                               break;
+
+                                       case ICMD_LCMP:
+                                               COUNT(count_pcmd_op);
+#if SUPPORT_LONG_CMP_CONST
+                                               if ((len > 0) && (iptr[1].val.i == 0)) {
+                                                       switch (iptr[1].opc) {
+                                                       case ICMD_IFEQ:
+                                                               iptr[0].opc = ICMD_IF_LCMPEQ;
+                                                       icmd_lcmp_if_tail:
+                                                               iptr[0].op1 = iptr[1].op1;
+                                                               iptr[1].opc = ICMD_NOP;
+/*                                                             len--; */
+/*                                                             bptr->icount--; */
+
+                                                               OP2_0(TYPE_LNG);
+                                                               tbptr = m->basicblocks +
+                                                                       m->basicblockindex[iptr[0].op1];
+                       
+                                                               iptr[0].target = (void *) tbptr;
+
+                                                               MARKREACHED(tbptr, copy);
+                                                               COUNT(count_pcmd_bra);
+                                                               break;
+                                                       case ICMD_IFNE:
+                                                               iptr[0].opc = ICMD_IF_LCMPNE;
+                                                               goto icmd_lcmp_if_tail;
+                                                       case ICMD_IFLT:
+                                                               iptr[0].opc = ICMD_IF_LCMPLT;
+                                                               goto icmd_lcmp_if_tail;
+                                                       case ICMD_IFGT:
+                                                               iptr[0].opc = ICMD_IF_LCMPGT;
+                                                               goto icmd_lcmp_if_tail;
+                                                       case ICMD_IFLE:
+                                                               iptr[0].opc = ICMD_IF_LCMPLE;
+                                                               goto icmd_lcmp_if_tail;
+                                                       case ICMD_IFGE:
+                                                               iptr[0].opc = ICMD_IF_LCMPGE;
+                                                               goto icmd_lcmp_if_tail;
+                                                       default:
+                                                               OPTT2_1(TYPE_LNG, TYPE_INT);
                                                        }
                                                }
-                                       }
-                               }
-                               printf("\n");
-# if defined(ENABLE_INTRP)
-                       }
-# endif
-#endif /* defined(ENABLE_JIT) && defined(ENABLE_DISASSEMBLER) */
+                                               else
+#endif /* SUPPORT_LONG_CMP_CONST */
+                                                       OPTT2_1(TYPE_LNG, TYPE_INT);
+                                               break;
 
-               }
-       }
-       printf("\n");
+#if 0
+                                       case ICMD_FCMPL:
+                                               COUNT(count_pcmd_op);
+                                               if ((len > 0) && (iptr[1].val.i == 0)) {
+                                                       switch (iptr[1].opc) {
+                                                       case ICMD_IFEQ:
+                                                               iptr[0].opc = ICMD_IF_FCMPEQ;
+                                                       icmd_if_fcmpl_tail:
+                                                               iptr[0].op1 = iptr[1].op1;
+                                                               iptr[1].opc = ICMD_NOP;
 
-#if defined(ENABLE_INTRP)
-               }
-#endif
-#if defined(ENABLE_LSRA)
-       }
-#endif
+                                                               OP2_0(TYPE_FLT);
+                                                               tbptr = m->basicblocks +
+                                                                       m->basicblockindex[iptr[0].op1];
+                       
+                                                               iptr[0].target = (void *) tbptr;
 
-       if (code->rplpoints) {
-               printf("Replacement Points:\n");
-               replace_show_replacement_points(code);
-               printf("\n");
-       }
+                                                               MARKREACHED(tbptr, copy);
+                                                               COUNT(count_pcmd_bra);
+                                                               break;
+                                                       case ICMD_IFNE:
+                                                               iptr[0].opc = ICMD_IF_FCMPNE;
+                                                               goto icmd_if_fcmpl_tail;
+                                                       case ICMD_IFLT:
+                                                               iptr[0].opc = ICMD_IF_FCMPL_LT;
+                                                               goto icmd_if_fcmpl_tail;
+                                                       case ICMD_IFGT:
+                                                               iptr[0].opc = ICMD_IF_FCMPL_GT;
+                                                               goto icmd_if_fcmpl_tail;
+                                                       case ICMD_IFLE:
+                                                               iptr[0].opc = ICMD_IF_FCMPL_LE;
+                                                               goto icmd_if_fcmpl_tail;
+                                                       case ICMD_IFGE:
+                                                               iptr[0].opc = ICMD_IF_FCMPL_GE;
+                                                               goto icmd_if_fcmpl_tail;
+                                                       default:
+                                                               OPTT2_1(TYPE_FLT, TYPE_INT);
+                                                       }
+                                               }
+                                               else
+                                                       OPTT2_1(TYPE_FLT, TYPE_INT);
+                                               break;
 
-#if defined(ENABLE_DISASSEMBLER)
-       /* show code before first basic block */
+                                       case ICMD_FCMPG:
+                                               COUNT(count_pcmd_op);
+                                               if ((len > 0) && (iptr[1].val.i == 0)) {
+                                                       switch (iptr[1].opc) {
+                                                       case ICMD_IFEQ:
+                                                               iptr[0].opc = ICMD_IF_FCMPEQ;
+                                                       icmd_if_fcmpg_tail:
+                                                               iptr[0].op1 = iptr[1].op1;
+                                                               iptr[1].opc = ICMD_NOP;
+
+                                                               OP2_0(TYPE_FLT);
+                                                               tbptr = m->basicblocks +
+                                                                       m->basicblockindex[iptr[0].op1];
+                       
+                                                               iptr[0].target = (void *) tbptr;
+
+                                                               MARKREACHED(tbptr, copy);
+                                                               COUNT(count_pcmd_bra);
+                                                               break;
+                                                       case ICMD_IFNE:
+                                                               iptr[0].opc = ICMD_IF_FCMPNE;
+                                                               goto icmd_if_fcmpg_tail;
+                                                       case ICMD_IFLT:
+                                                               iptr[0].opc = ICMD_IF_FCMPG_LT;
+                                                               goto icmd_if_fcmpg_tail;
+                                                       case ICMD_IFGT:
+                                                               iptr[0].opc = ICMD_IF_FCMPG_GT;
+                                                               goto icmd_if_fcmpg_tail;
+                                                       case ICMD_IFLE:
+                                                               iptr[0].opc = ICMD_IF_FCMPG_LE;
+                                                               goto icmd_if_fcmpg_tail;
+                                                       case ICMD_IFGE:
+                                                               iptr[0].opc = ICMD_IF_FCMPG_GE;
+                                                               goto icmd_if_fcmpg_tail;
+                                                       default:
+                                                               OPTT2_1(TYPE_FLT, TYPE_INT);
+                                                       }
+                                               }
+                                               else
+                                                       OPTT2_1(TYPE_FLT, TYPE_INT);
+                                               break;
+
+                                       case ICMD_DCMPL:
+                                               COUNT(count_pcmd_op);
+                                               if ((len > 0) && (iptr[1].val.i == 0)) {
+                                                       switch (iptr[1].opc) {
+                                                       case ICMD_IFEQ:
+                                                               iptr[0].opc = ICMD_IF_DCMPEQ;
+                                                       icmd_if_dcmpl_tail:
+                                                               iptr[0].op1 = iptr[1].op1;
+                                                               iptr[1].opc = ICMD_NOP;
 
-       if (opt_showdisassemble) {
-               u1ptr = (u1 *) ((ptrint) code->mcode + cd->dseglen);
+                                                               OP2_0(TYPE_DBL);
+                                                               tbptr = m->basicblocks +
+                                                                       m->basicblockindex[iptr[0].op1];
+                       
+                                                               iptr[0].target = (void *) tbptr;
 
-               for (; u1ptr < (u1 *) ((ptrint) code->mcode + cd->dseglen + m->basicblocks[0].mpc);)
-                       DISASSINSTR(u1ptr);
+                                                               MARKREACHED(tbptr, copy);
+                                                               COUNT(count_pcmd_bra);
+                                                               break;
+                                                       case ICMD_IFNE:
+                                                               iptr[0].opc = ICMD_IF_DCMPNE;
+                                                               goto icmd_if_dcmpl_tail;
+                                                       case ICMD_IFLT:
+                                                               iptr[0].opc = ICMD_IF_DCMPL_LT;
+                                                               goto icmd_if_dcmpl_tail;
+                                                       case ICMD_IFGT:
+                                                               iptr[0].opc = ICMD_IF_DCMPL_GT;
+                                                               goto icmd_if_dcmpl_tail;
+                                                       case ICMD_IFLE:
+                                                               iptr[0].opc = ICMD_IF_DCMPL_LE;
+                                                               goto icmd_if_dcmpl_tail;
+                                                       case ICMD_IFGE:
+                                                               iptr[0].opc = ICMD_IF_DCMPL_GE;
+                                                               goto icmd_if_dcmpl_tail;
+                                                       default:
+                                                               OPTT2_1(TYPE_DBL, TYPE_INT);
+                                                       }
+                                               }
+                                               else
+                                                       OPTT2_1(TYPE_DBL, TYPE_INT);
+                                               break;
 
-               printf("\n");
-       }
-#endif
+                                       case ICMD_DCMPG:
+                                               COUNT(count_pcmd_op);
+                                               if ((len > 0) && (iptr[1].val.i == 0)) {
+                                                       switch (iptr[1].opc) {
+                                                       case ICMD_IFEQ:
+                                                               iptr[0].opc = ICMD_IF_DCMPEQ;
+                                                       icmd_if_dcmpg_tail:
+                                                               iptr[0].op1 = iptr[1].op1;
+                                                               iptr[1].opc = ICMD_NOP;
 
-       /* show code of all basic blocks */
+                                                               OP2_0(TYPE_DBL);
+                                                               tbptr = m->basicblocks +
+                                                                       m->basicblockindex[iptr[0].op1];
+                       
+                                                               iptr[0].target = (void *) tbptr;
 
-       for (bptr = m->basicblocks; bptr != NULL; bptr = bptr->next)
-               stack_show_basicblock(jd, bptr);
+                                                               MARKREACHED(tbptr, copy);
+                                                               COUNT(count_pcmd_bra);
+                                                               break;
+                                                       case ICMD_IFNE:
+                                                               iptr[0].opc = ICMD_IF_DCMPNE;
+                                                               goto icmd_if_dcmpg_tail;
+                                                       case ICMD_IFLT:
+                                                               iptr[0].opc = ICMD_IF_DCMPG_LT;
+                                                               goto icmd_if_dcmpg_tail;
+                                                       case ICMD_IFGT:
+                                                               iptr[0].opc = ICMD_IF_DCMPG_GT;
+                                                               goto icmd_if_dcmpg_tail;
+                                                       case ICMD_IFLE:
+                                                               iptr[0].opc = ICMD_IF_DCMPG_LE;
+                                                               goto icmd_if_dcmpg_tail;
+                                                       case ICMD_IFGE:
+                                                               iptr[0].opc = ICMD_IF_DCMPG_GE;
+                                                               goto icmd_if_dcmpg_tail;
+                                                       default:
+                                                               OPTT2_1(TYPE_DBL, TYPE_INT);
+                                                       }
+                                               }
+                                               else
+                                                       OPTT2_1(TYPE_DBL, TYPE_INT);
+                                               break;
+#else
+                                       case ICMD_FCMPL:
+                                       case ICMD_FCMPG:
+                                               COUNT(count_pcmd_op);
+                                               OPTT2_1(TYPE_FLT, TYPE_INT);
+                                               break;
 
-#if defined(ENABLE_DISASSEMBLER)
-       /* show stubs code */
+                                       case ICMD_DCMPL:
+                                       case ICMD_DCMPG:
+                                               COUNT(count_pcmd_op);
+                                               OPTT2_1(TYPE_DBL, TYPE_INT);
+                                               break;
+#endif
 
-       if (opt_showdisassemble && opt_showexceptionstubs) {
-               printf("\nException stubs code:\n");
-               printf("Length: %d\n\n", (s4) (code->mcodelength -
-                                                                          ((ptrint) cd->dseglen +
-                                                                               m->basicblocks[m->basicblockcount].mpc)));
+                                               /* pop 1 push 1 */
+                                               
+                                       case ICMD_INEG:
+                                       case ICMD_INT2BYTE:
+                                       case ICMD_INT2CHAR:
+                                       case ICMD_INT2SHORT:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_INT, TYPE_INT);
+                                               break;
+                                       case ICMD_LNEG:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_LNG, TYPE_LNG);
+                                               break;
+                                       case ICMD_FNEG:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_FLT, TYPE_FLT);
+                                               break;
+                                       case ICMD_DNEG:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_DBL, TYPE_DBL);
+                                               break;
 
-               u1ptr = (u1 *) ((ptrint) code->mcode + cd->dseglen +
-                                               m->basicblocks[m->basicblockcount].mpc);
+                                       case ICMD_I2L:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_INT, TYPE_LNG);
+                                               break;
+                                       case ICMD_I2F:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_INT, TYPE_FLT);
+                                               break;
+                                       case ICMD_I2D:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_INT, TYPE_DBL);
+                                               break;
+                                       case ICMD_L2I:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_LNG, TYPE_INT);
+                                               break;
+                                       case ICMD_L2F:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_LNG, TYPE_FLT);
+                                               break;
+                                       case ICMD_L2D:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_LNG, TYPE_DBL);
+                                               break;
+                                       case ICMD_F2I:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_FLT, TYPE_INT);
+                                               break;
+                                       case ICMD_F2L:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_FLT, TYPE_LNG);
+                                               break;
+                                       case ICMD_F2D:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_FLT, TYPE_DBL);
+                                               break;
+                                       case ICMD_D2I:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_DBL, TYPE_INT);
+                                               break;
+                                       case ICMD_D2L:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_DBL, TYPE_LNG);
+                                               break;
+                                       case ICMD_D2F:
+                                               COUNT(count_pcmd_op);
+                                               OP1_1(TYPE_DBL, TYPE_FLT);
+                                               break;
 
-               for (; (ptrint) u1ptr < ((ptrint) code->mcode + code->mcodelength);)
-                       DISASSINSTR(u1ptr);
+                                       case ICMD_CHECKCAST:
+                                               if (iptr->op1 == 0) {
+                                                       /* array type cast-check */
 
-               printf("\n");
-       }
-#endif
+                                                       bte = builtintable_get_internal(BUILTIN_arraycheckcast);
+                                                       md = bte->md;
 
-#if defined(USE_THREADS)
-       builtin_monitorexit(lock_stack_show_icmd);
-#endif
+                                                       if (md->memuse > rd->memuse)
+                                                               rd->memuse = md->memuse;
+                                                       if (md->argintreguse > rd->argintreguse)
+                                                               rd->argintreguse = md->argintreguse;
 
-       /* finally flush the output */
+                                                       /* make all stack variables saved */
 
-       fflush(stdout);
-}
-#endif /* !defined(NDEBUG) */
+                                                       copy = curstack;
+                                                       while (copy) {
+                                                               copy->flags |= SAVEDVAR;
+                                                               copy = copy->prev;
+                                                       }
+                                               }
+                                               OP1_1(TYPE_ADR, TYPE_ADR);
+                                               break;
 
+                                       case ICMD_INSTANCEOF:
+                                       case ICMD_ARRAYLENGTH:
+                                               OP1_1(TYPE_ADR, TYPE_INT);
+                                               break;
 
-/* stack_show_basicblock *******************************************************
+                                       case ICMD_NEWARRAY:
+                                       case ICMD_ANEWARRAY:
+                                               OP1_1(TYPE_INT, TYPE_ADR);
+                                               break;
 
-   Print the intermediate representation of a basic block.
+                                       case ICMD_GETFIELD:
+                                               COUNT(count_check_null);
+                                               COUNT(count_pcmd_mem);
+                                               OP1_1(TYPE_ADR, iptr->op1);
+                                               break;
 
-   NOTE: Currently this function may only be called after register allocation!
+                                               /* pop 0 push 1 */
+                                               
+                                       case ICMD_GETSTATIC:
+                                               COUNT(count_pcmd_mem);
+                                               OP0_1(iptr->op1);
+                                               break;
 
-*******************************************************************************/
+                                       case ICMD_NEW:
+                                               OP0_1(TYPE_ADR);
+                                               break;
 
-#if !defined(NDEBUG)
-void stack_show_basicblock(jitdata *jd, basicblock *bptr)
-{
-       methodinfo  *m;
-       codeinfo    *code;
-       codegendata *cd;
-       s4           i, j;
-       bool         deadcode;
-       instruction *iptr;
-       u1          *u1ptr;
+                                       case ICMD_JSR:
+                                               OP0_1(TYPE_ADR);
+                                               tbptr = m->basicblocks + m->basicblockindex[iptr->op1];
 
-       /* get required compiler data */
+                                               iptr[0].target = (void *) tbptr;
 
-       m    = jd->m;
-       code = jd->code;
-       cd   = jd->cd;
+                                               /* This is a dirty hack. The typechecker
+                                                * needs it because the OP1_0ANY below
+                                                * overwrites iptr->dst.
+                                                */
+                                               iptr->val.a = (void *) iptr->dst;
 
-       if (bptr->flags != BBDELETED) {
-               deadcode = bptr->flags <= BBREACHED;
+                                               tbptr->type = BBTYPE_SBR;
 
-               printf("[");
+                                               /* We need to check for overflow right here because
+                                                * the pushed value is poped after MARKREACHED. */
+                                               CHECKOVERFLOW;
+                                               MARKREACHED(tbptr, copy);
+                                               OP1_0ANY;
+                                               break;
 
-               if (deadcode)
-                       for (j = cd->maxstack; j > 0; j--)
-                               printf(" ?  ");
-               else
-                       stack_print_stack(cd, bptr->instack);
-
-               printf("] %sL%03d(flags: %d, bitflags: %01x, next: %d, type: ",
-                               (bptr->bitflags & BBFLAG_REPLACEMENT) ? "<REPLACE> " : "",
-                          bptr->debug_nr, bptr->flags, bptr->bitflags, 
-                          (bptr->next) ? (bptr->next->debug_nr) : -1);
-
-               switch (bptr->type) {
-               case BBTYPE_STD:
-                       printf("STD");
-                       break;
-               case BBTYPE_EXH:
-                       printf("EXH");
-                       break;
-               case BBTYPE_SBR:
-                       printf("SBR");
-                       break;
-               }
+                                       /* pop many push any */
 
-               printf(", instruction count: %d, predecessors: %d):\n",
-                          bptr->icount, bptr->pre_count);
+                                       case ICMD_BUILTIN:
+                                       builtin:
+                                               bte = (builtintable_entry *) iptr->val.a;
+                                               md = bte->md;
+                                               goto _callhandling;
 
-               iptr = bptr->iinstr;
+                                       case ICMD_INVOKESTATIC:
+                                       case ICMD_INVOKESPECIAL:
+                                       case ICMD_INVOKEVIRTUAL:
+                                       case ICMD_INVOKEINTERFACE:
+                                               COUNT(count_pcmd_met);
+                                               INSTRUCTION_GET_METHODDESC(iptr,md);
+/*                          if (lm->flags & ACC_STATIC) */
+/*                              {COUNT(count_check_null);} */   
 
-               for (i = 0; i < bptr->icount; i++, iptr++) {
-                       printf("[");
+                                       _callhandling:
 
-                       if (deadcode)
-                               for (j = cd->maxstack; j > 0; j--)
-                                       printf(" ?  ");
-                       else
-                               stack_print_stack(cd, iptr->dst);
+/*                                             last_pei = bptr->icount - len - 1; */
 
-                       printf("] %5d (line: %5d)  ", i, iptr->line);
+                                               i = md->paramcount;
 
-                       stack_show_icmd(iptr, deadcode);
-                       printf("\n");
-               }
+                                               if (md->memuse > rd->memuse)
+                                                       rd->memuse = md->memuse;
+                                               if (md->argintreguse > rd->argintreguse)
+                                                       rd->argintreguse = md->argintreguse;
+                                               if (md->argfltreguse > rd->argfltreguse)
+                                                       rd->argfltreguse = md->argfltreguse;
 
-#if defined(ENABLE_DISASSEMBLER)
-               if (opt_showdisassemble && (!deadcode)) {
-                       printf("\n");
-                       u1ptr = (u1 *) ((ptrint) code->mcode + cd->dseglen + bptr->mpc);
+                                               REQUIRE(i);
 
-                       if (bptr->next != NULL) {
-                               for (; u1ptr < (u1 *) ((ptrint) code->mcode + cd->dseglen + bptr->next->mpc);)
-                                       DISASSINSTR(u1ptr);
+                                               copy = curstack;
+                                               for (i-- ; i >= 0; i--) {
+#if defined(SUPPORT_PASS_FLOATARGS_IN_INTREGS)
+                                               /* If we pass float arguments in integer argument registers, we
+                                                * are not allowed to precolor them here. Floats have to be moved
+                                                * to this regs explicitly in codegen().
+                                                * Only arguments that are passed by stack anyway can be precolored
+                                                * (michi 2005/07/24) */
+                                                       if (!(copy->flags & SAVEDVAR) &&
+                                                          (!IS_FLT_DBL_TYPE(copy->type) || md->params[i].inmemory)) {
+#else
+                                                       if (!(copy->flags & SAVEDVAR)) {
+#endif
+                                                               copy->varkind = ARGVAR;
+                                                               copy->varnum = i;
 
-                       } 
-                       else {
-                               for (; u1ptr < (u1 *) ((ptrint) code->mcode + code->mcodelength);)
-                                       DISASSINSTR(u1ptr); 
-                       }
-                       printf("\n");
-               }
+#if defined(ENABLE_INTRP)
+                                                               if (!opt_intrp) {
+#endif
+                                                                       if (md->params[i].inmemory) {
+                                                                               copy->flags = INMEMORY;
+                                                                               copy->regoff = md->params[i].regoff;
+                                                                       } 
+                                                                       else {
+                                                                               copy->flags = 0;
+                                                                               if (IS_FLT_DBL_TYPE(copy->type))
+#if defined(SUPPORT_PASS_FLOATARGS_IN_INTREGS)
+                                                                                       assert(0); /* XXX is this assert ok? */
+#else
+                                                                               copy->regoff =
+                                                                                       rd->argfltregs[md->params[i].regoff];
+#endif
+                                                                               else {
+#if defined(SUPPORT_COMBINE_INTEGER_REGISTERS)
+                                                                                       if (IS_2_WORD_TYPE(copy->type))
+                                                                                               copy->regoff = PACK_REGS(
+                                                                                                                                                rd->argintregs[GET_LOW_REG(md->params[i].regoff)],
+                                                                                                                                                rd->argintregs[GET_HIGH_REG(md->params[i].regoff)]);
+                                                                                       else
 #endif
-       }
-}
-#endif /* !defined(NDEBUG) */
+                                                                                               copy->regoff =
+                                                                                                       rd->argintregs[md->params[i].regoff];
+                                                                               }
+                                                                       }
+#if defined(ENABLE_INTRP)
+                                                               }
+#endif
+                                                       }
+                                                       copy = copy->prev;
+                                               }
 
+                                               while (copy) {
+                                                       copy->flags |= SAVEDVAR;
+                                                       copy = copy->prev;
+                                               }
 
-/* stack_show_icmd *************************************************************
+                                               i = md->paramcount;
+                                               POPMANY(i);
+                                               if (md->returntype.type != TYPE_VOID)
+                                                       OP0_1(md->returntype.type);
+                                               break;
 
-   Print the intermediate representation of an instruction.
+                                       case ICMD_INLINE_START:
+                                       case ICMD_INLINE_END:
+                                               SETDST;
+                                               break;
 
-   NOTE: Currently this function may only be called after register allocation!
+                                       case ICMD_MULTIANEWARRAY:
+                                               if (rd->argintreguse < 3)
+                                                       rd->argintreguse = 3;
 
-*******************************************************************************/
+                                               i = iptr->op1;
 
-#if !defined(NDEBUG)
-void stack_show_icmd(instruction *iptr, bool deadcode)
-{
-       u2                 opcode;
-       u2                 condition;
-       int j;
-       s4  *s4ptr;
-       void **tptr = NULL;
-       classinfo         *c;
-       fieldinfo         *f;
-       constant_classref *cr;
-       unresolved_field  *uf;
-
-       /* get the opcode and the condition */
-
-       opcode    =  iptr->opc & ICMD_OPCODE_MASK;
-       condition = (iptr->opc & ICMD_CONDITION_MASK) >> 8;
-
-       printf("%s", icmd_names[opcode]);
-
-       /* Print the condition for conditional instructions. */
-
-       if (condition != 0)
-               printf(" (condition: %s)", icmd_names[condition]);
-
-       switch (opcode) {
-       case ICMD_IADDCONST:
-       case ICMD_ISUBCONST:
-       case ICMD_IMULCONST:
-       case ICMD_IMULPOW2:
-       case ICMD_IDIVPOW2:
-       case ICMD_IREMPOW2:
-       case ICMD_IANDCONST:
-       case ICMD_IORCONST:
-       case ICMD_IXORCONST:
-       case ICMD_ISHLCONST:
-       case ICMD_ISHRCONST:
-       case ICMD_IUSHRCONST:
-       case ICMD_LSHLCONST:
-       case ICMD_LSHRCONST:
-       case ICMD_LUSHRCONST:
-       case ICMD_ICONST:
-       case ICMD_IASTORECONST:
-       case ICMD_BASTORECONST:
-       case ICMD_CASTORECONST:
-       case ICMD_SASTORECONST:
-               printf(" %d (0x%08x)", iptr->val.i, iptr->val.i);
-               break;
-
-       case ICMD_IFEQ_ICONST:
-       case ICMD_IFNE_ICONST:
-       case ICMD_IFLT_ICONST:
-       case ICMD_IFGE_ICONST:
-       case ICMD_IFGT_ICONST:
-       case ICMD_IFLE_ICONST:
-               printf(" %d, %d (0x%08x)", iptr[1].op1, iptr->val.i, iptr->val.i);
-               break;
-
-       case ICMD_ELSE_ICONST:
-               printf("    %d (0x%08x)", iptr->val.i, iptr->val.i);
-               break;
-
-       case ICMD_LADDCONST:
-       case ICMD_LSUBCONST:
-       case ICMD_LMULCONST:
-       case ICMD_LMULPOW2:
-       case ICMD_LDIVPOW2:
-       case ICMD_LREMPOW2:
-       case ICMD_LANDCONST:
-       case ICMD_LORCONST:
-       case ICMD_LXORCONST:
-       case ICMD_LCONST:
-       case ICMD_LASTORECONST:
-#if SIZEOF_VOID_P == 4
-               printf(" %lld (0x%016llx)", iptr->val.l, iptr->val.l);
+                                               REQUIRE(i);
+#if defined(SPECIALMEMUSE)
+# if defined(__DARWIN__)
+                                               if (rd->memuse < (i + INT_ARG_CNT + LA_SIZE_IN_POINTERS))
+                                                       rd->memuse = i + LA_SIZE_IN_POINTERS + INT_ARG_CNT;
+# else
+                                               if (rd->memuse < (i + LA_SIZE_IN_POINTERS + 3))
+                                                       rd->memuse = i + LA_SIZE_IN_POINTERS + 3;
+# endif
 #else
-               printf(" %ld (0x%016lx)", iptr->val.l, iptr->val.l);
+# if defined(__I386__)
+                                               if (rd->memuse < i + 3)
+                                                       rd->memuse = i + 3; /* n integer args spilled on stack */
+# elif defined(__MIPS__) && SIZEOF_VOID_P == 4
+                                               if (rd->memuse < i + 2)
+                                                       rd->memuse = i + 2; /* 4*4 bytes callee save space */
+# else
+                                               if (rd->memuse < i)
+                                                       rd->memuse = i; /* n integer args spilled on stack */
+# endif /* defined(__I386__) */
 #endif
-               break;
-
-       case ICMD_FCONST:
-               printf(" %f (0x%08x)", iptr->val.f, iptr->val.i);
-               break;
-
-       case ICMD_DCONST:
-#if SIZEOF_VOID_P == 4
-               printf(" %g (0x%016llx)", iptr->val.d, iptr->val.l);
+                                               copy = curstack;
+                                               while (--i >= 0) {
+                                                       /* check INT type here? Currently typecheck does this. */
+                                                       if (!(copy->flags & SAVEDVAR)) {
+                                                               copy->varkind = ARGVAR;
+                                                               copy->varnum = i + INT_ARG_CNT;
+                                                               copy->flags |= INMEMORY;
+#if defined(SPECIALMEMUSE)
+# if defined(__DARWIN__)
+                                                               copy->regoff = i + LA_SIZE_IN_POINTERS + INT_ARG_CNT;
+# else
+                                                               copy->regoff = i + LA_SIZE_IN_POINTERS + 3;
+# endif
 #else
-               printf(" %g (0x%016lx)", iptr->val.d, iptr->val.l);
-#endif
-               break;
-
-       case ICMD_ACONST:
-       case ICMD_AASTORECONST:
-               /* check if this is a constant string or a class reference */
-
-               cr = iptr->target;
-
-               if (cr != NULL) {
-                       if (iptr->val.a == NULL)
-                               printf(" (NOT RESOLVED)");
-                       else
-                               printf(" %p", iptr->val.a);
-
-                       printf(", Class = \"");
-                       utf_display(cr->name);
-                       printf("\"");
+# if defined(__I386__)
+                                                               copy->regoff = i + 3;
+# elif defined(__MIPS__) && SIZEOF_VOID_P == 4
+                                                               copy->regoff = i + 2;
+# else
+                                                               copy->regoff = i;
+# endif /* defined(__I386__) */
+#endif /* defined(SPECIALMEMUSE) */
+                                                       }
+                                                       copy = copy->prev;
+                                               }
+                                               while (copy) {
+                                                       copy->flags |= SAVEDVAR;
+                                                       copy = copy->prev;
+                                               }
+                                               i = iptr->op1;
+                                               POPMANY(i);
+                                               OP0_1(TYPE_ADR);
+                                               break;
 
-               } 
-               else {
-                       printf(" %p", iptr->val.a);
+                                       default:
+                                               *exceptionptr =
+                                                       new_internalerror("Unknown ICMD %d", opcode);
+                                               return false;
+                                       } /* switch */
 
-                       if (iptr->val.a) {
-                               printf(", String = \"");
-                               utf_display(javastring_toutf(iptr->val.a, false));
-                               printf("\"");
-                       }
-               }
-               break;
+                                       CHECKOVERFLOW;
+                                       iptr++;
+                               } /* while instructions */
 
-       case ICMD_GETFIELD:
-       case ICMD_PUTFIELD:
-               if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
-                       uf = INSTRUCTION_UNRESOLVED_FIELD(iptr);
-                       printf(" (NOT RESOLVED) ");
+                               /* set out-stack of block */
 
-                       field_fieldref_print(uf->fieldref);
-               }
-               else {
-                       f = INSTRUCTION_RESOLVED_FIELDINFO(iptr);
-                       printf(" %d, ", f->offset);
+                               bptr->outstack = curstack;
+                               bptr->outdepth = stackdepth;
 
-                       field_print(f);
-               }
-               break;
+                               /* stack slots at basic block end become interfaces */
 
-       case ICMD_PUTSTATIC:
-       case ICMD_GETSTATIC:
-               if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
-                       uf = INSTRUCTION_UNRESOLVED_FIELD(iptr);
-                       printf(" (NOT RESOLVED) ");
+                               i = stackdepth - 1;
+                               for (copy = curstack; copy; i--, copy = copy->prev) {
+                                       if ((copy->varkind == STACKVAR) && (copy->varnum > i))
+                                               copy->varkind = TEMPVAR;
+                                       else {
+                                               copy->varkind = STACKVAR;
+                                               copy->varnum = i;
+                                       }
+                                       IF_NO_INTRP(
+                                                       rd->interfaces[i][copy->type].type = copy->type;
+                                                       rd->interfaces[i][copy->type].flags |= copy->flags;
+                                       );
+                               }
 
-                       field_fieldref_print(uf->fieldref);
-               }
-               else {
-                       f = INSTRUCTION_RESOLVED_FIELDINFO(iptr);
-                       if (!CLASS_IS_OR_ALMOST_INITIALIZED(f->class))
-                               printf(" (NOT INITIALIZED) ");
-                       else
-                               printf(" ");
+                               /* check if interface slots at basic block begin must be saved */
 
-                       field_print(f);
-               }
-               break;
-
-       case ICMD_PUTSTATICCONST:
-       case ICMD_PUTFIELDCONST:
-               switch (iptr[1].op1) {
-               case TYPE_INT:
-                       printf(" %d (0x%08x),", iptr->val.i, iptr->val.i);
-                       break;
-               case TYPE_LNG:
-#if SIZEOF_VOID_P == 4
-                       printf(" %lld (0x%016llx),", iptr->val.l, iptr->val.l);
-#else
-                       printf(" %ld (0x%016lx),", iptr->val.l, iptr->val.l);
-#endif
-                       break;
-               case TYPE_ADR:
-                       printf(" %p,", iptr->val.a);
-                       break;
-               case TYPE_FLT:
-                       printf(" %g (0x%08x),", iptr->val.f, iptr->val.i);
-                       break;
-               case TYPE_DBL:
-#if SIZEOF_VOID_P == 4
-                       printf(" %g (0x%016llx),", iptr->val.d, iptr->val.l);
-#else
-                       printf(" %g (0x%016lx),", iptr->val.d, iptr->val.l);
-#endif
-                       break;
-               }
+                               IF_NO_INTRP(
+                                       i = bptr->indepth - 1;
+                                       for (copy = bptr->instack; copy; i--, copy = copy->prev) {
+                                               rd->interfaces[i][copy->type].type = copy->type;
+                                               if (copy->varkind == STACKVAR) {
+                                                       if (copy->flags & SAVEDVAR)
+                                                               rd->interfaces[i][copy->type].flags |= SAVEDVAR;
+                                               }
+                                       }
+                               );
 
-               if (INSTRUCTION_IS_UNRESOLVED(iptr + 1)) {
-                       uf = INSTRUCTION_UNRESOLVED_FIELD(iptr + 1);
-                       printf(" (NOT RESOLVED) ");
-                       field_fieldref_print(uf->fieldref);
-               }
-               else {
-                       f = INSTRUCTION_RESOLVED_FIELDINFO(iptr + 1);
-                       if ((iptr->opc == ICMD_PUTSTATICCONST) &&
-                               !CLASS_IS_OR_ALMOST_INITIALIZED(f->class))
-                               printf(" (NOT INITIALIZED), ");
+                       } /* if */
                        else
-                               printf(" %d, ", f->offset);
-                       field_print(f);
-               }
-               break;
-
-       case ICMD_IINC:
-               printf(" %d + %d", iptr->op1, iptr->val.i);
-               break;
-
-       case ICMD_IASTORE:
-       case ICMD_SASTORE:
-       case ICMD_BASTORE:
-       case ICMD_CASTORE:
-       case ICMD_LASTORE:
-       case ICMD_DASTORE:
-       case ICMD_FASTORE:
-       case ICMD_AASTORE:
-
-       case ICMD_IALOAD:
-       case ICMD_SALOAD:
-       case ICMD_BALOAD:
-       case ICMD_CALOAD:
-       case ICMD_LALOAD:
-       case ICMD_DALOAD:
-       case ICMD_FALOAD:
-       case ICMD_AALOAD:
-               if (iptr->op1 != 0)
-                       printf("(opt.)");
-               break;
-
-       case ICMD_RET:
-       case ICMD_ILOAD:
-       case ICMD_LLOAD:
-       case ICMD_FLOAD:
-       case ICMD_DLOAD:
-       case ICMD_ALOAD:
-       case ICMD_ISTORE:
-       case ICMD_LSTORE:
-       case ICMD_FSTORE:
-       case ICMD_DSTORE:
-       case ICMD_ASTORE:
-               printf(" %d", iptr->op1);
-               break;
-
-       case ICMD_NEW:
-               c = iptr->val.a;
-               printf(" ");
-               utf_display_classname(c->name);
-               break;
-
-       case ICMD_NEWARRAY:
-               switch (iptr->op1) {
-               case 4:
-                       printf(" boolean");
-                       break;
-               case 5:
-                       printf(" char");
-                       break;
-               case 6:
-                       printf(" float");
-                       break;
-               case 7:
-                       printf(" double");
-                       break;
-               case 8:
-                       printf(" byte");
-                       break;
-               case 9:
-                       printf(" short");
-                       break;
-               case 10:
-                       printf(" int");
-                       break;
-               case 11:
-                       printf(" long");
-                       break;
-               }
-               break;
+                               superblockend = true;
 
-       case ICMD_ANEWARRAY:
-               if (iptr->op1) {
-                       c = iptr->val.a;
-                       printf(" ");
-                       utf_display_classname(c->name);
-               }
-               break;
-
-       case ICMD_MULTIANEWARRAY:
-               c  = iptr->val.a;
-               cr = iptr->target;
-
-               if (c == NULL) {
-                       printf(" (NOT RESOLVED) %d ", iptr->op1);
-                       utf_display(cr->name);
-               } 
-               else {
-                       printf(" %d ", iptr->op1);
-                       utf_display_classname(c->name);
-               }
-               break;
+                       bptr++;
+               } /* while blocks */
+       } while (repeat && !deadcode);
 
-       case ICMD_CHECKCAST:
-       case ICMD_INSTANCEOF:
-               c  = iptr->val.a;
-               cr = iptr->target;
+#if defined(ENABLE_STATISTICS)
+       if (opt_stat) {
+               if (m->basicblockcount > count_max_basic_blocks)
+                       count_max_basic_blocks = m->basicblockcount;
+               count_basic_blocks += m->basicblockcount;
+               if (m->instructioncount > count_max_javainstr)                  count_max_javainstr = m->instructioncount;
+               count_javainstr += m->instructioncount;
+               if (m->stackcount > count_upper_bound_new_stack)
+                       count_upper_bound_new_stack = m->stackcount;
+               if ((new - m->stack) > count_max_new_stack)
+                       count_max_new_stack = (new - m->stack);
 
-               if (c) {
-                       if (c->flags & ACC_INTERFACE)
-                               printf(" (INTERFACE) ");
-                       else
-                               printf(" (CLASS,%3d) ", c->vftbl->diffval);
-               } else
-                       printf(" (NOT RESOLVED) ");
-               utf_display_classname(cr->name);
-               break;
-
-       case ICMD_INLINE_START:
-       case ICMD_INLINE_END:
-               {
-                       insinfo_inline *insinfo = (insinfo_inline *) iptr->target;
-                       printf(" ");
-                       method_print(insinfo->method);
-               }
-               break;
-
-       case ICMD_BUILTIN:
-               printf(" %s", ((builtintable_entry *) iptr->val.a)->name);
-               break;
-
-       case ICMD_INVOKEVIRTUAL:
-       case ICMD_INVOKESPECIAL:
-       case ICMD_INVOKESTATIC:
-       case ICMD_INVOKEINTERFACE:
-               {
-                       constant_FMIref *mref;
-                       
-                       if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
-                               printf(" (NOT RESOLVED) ");
-                               mref = INSTRUCTION_UNRESOLVED_METHOD(iptr)->methodref;
-                       }
-                       else {
-                               printf(" ");
-                               mref = INSTRUCTION_RESOLVED_FMIREF(iptr);
+               b_count = m->basicblockcount;
+               bptr = m->basicblocks;
+               while (--b_count >= 0) {
+                       if (bptr->flags > BBREACHED) {
+                               if (bptr->indepth >= 10)
+                                       count_block_stack[10]++;
+                               else
+                                       count_block_stack[bptr->indepth]++;
+                               len = bptr->icount;
+                               if (len < 10) 
+                                       count_block_size_distribution[len]++;
+                               else if (len <= 12)
+                                       count_block_size_distribution[10]++;
+                               else if (len <= 14)
+                                       count_block_size_distribution[11]++;
+                               else if (len <= 16)
+                                       count_block_size_distribution[12]++;
+                               else if (len <= 18)
+                                       count_block_size_distribution[13]++;
+                               else if (len <= 20)
+                                       count_block_size_distribution[14]++;
+                               else if (len <= 25)
+                                       count_block_size_distribution[15]++;
+                               else if (len <= 30)
+                                       count_block_size_distribution[16]++;
+                               else
+                                       count_block_size_distribution[17]++;
                        }
-                       method_methodref_print(mref);
-               }
-               break;
-
-       case ICMD_IFEQ:
-       case ICMD_IFNE:
-       case ICMD_IFLT:
-       case ICMD_IFGE:
-       case ICMD_IFGT:
-       case ICMD_IFLE:
-               printf(" %d (0x%08x)", iptr->val.i, iptr->val.i);
-
-               if ((iptr->opc & ICMD_CONDITION_MASK) == 0) {
-                       if (deadcode || !iptr->target)
-                               printf(" op1=%d", iptr->op1);
-                       else
-                               printf(" L%03d (%p)", ((basicblock *) iptr->target)->debug_nr, iptr->target);
+                       bptr++;
                }
-               break;
-
-       case ICMD_IF_LEQ:
-       case ICMD_IF_LNE:
-       case ICMD_IF_LLT:
-       case ICMD_IF_LGE:
-       case ICMD_IF_LGT:
-       case ICMD_IF_LLE:
-#if SIZEOF_VOID_P == 4
-               printf(" %lld (%016llx)", iptr->val.l, iptr->val.l);
-#else
-               printf(" %ld (%016lx)", iptr->val.l, iptr->val.l);
-#endif
 
-               if ((iptr->opc & ICMD_CONDITION_MASK) == 0) {
-                       if (deadcode || !iptr->target)
-                               printf(" op1=%d", iptr->op1);
-                       else
-                               printf(" L%03d", ((basicblock *) iptr->target)->debug_nr);
-               }
-               break;
+               if (loops == 1)
+                       count_analyse_iterations[0]++;
+               else if (loops == 2)
+                       count_analyse_iterations[1]++;
+               else if (loops == 3)
+                       count_analyse_iterations[2]++;
+               else if (loops == 4)
+                       count_analyse_iterations[3]++;
+               else
+                       count_analyse_iterations[4]++;
 
-       case ICMD_JSR:
-       case ICMD_GOTO:
-       case ICMD_INLINE_GOTO:
-               if (deadcode || !iptr->target)
-                       printf(" op1=%d", iptr->op1);
+               if (m->basicblockcount <= 5)
+                       count_method_bb_distribution[0]++;
+               else if (m->basicblockcount <= 10)
+                       count_method_bb_distribution[1]++;
+               else if (m->basicblockcount <= 15)
+                       count_method_bb_distribution[2]++;
+               else if (m->basicblockcount <= 20)
+                       count_method_bb_distribution[3]++;
+               else if (m->basicblockcount <= 30)
+                       count_method_bb_distribution[4]++;
+               else if (m->basicblockcount <= 40)
+                       count_method_bb_distribution[5]++;
+               else if (m->basicblockcount <= 50)
+                       count_method_bb_distribution[6]++;
+               else if (m->basicblockcount <= 75)
+                       count_method_bb_distribution[7]++;
                else
-                       printf(" L%03d (%p)", ((basicblock *) iptr->target)->debug_nr,iptr->target);
-               break;
-
-       case ICMD_IFNULL:
-       case ICMD_IFNONNULL:
-       case ICMD_IF_ICMPEQ:
-       case ICMD_IF_ICMPNE:
-       case ICMD_IF_ICMPLT:
-       case ICMD_IF_ICMPGE:
-       case ICMD_IF_ICMPGT:
-       case ICMD_IF_ICMPLE:
-       case ICMD_IF_LCMPEQ:
-       case ICMD_IF_LCMPNE:
-       case ICMD_IF_LCMPLT:
-       case ICMD_IF_LCMPGE:
-       case ICMD_IF_LCMPGT:
-       case ICMD_IF_LCMPLE:
-       case ICMD_IF_ACMPEQ:
-       case ICMD_IF_ACMPNE:
-               if (!(iptr->opc & ICMD_CONDITION_MASK)) {
-                       if (deadcode || !iptr->target)
-                               printf(" op1=%d", iptr->op1);
-                       else
-                               printf(" L%03d (%p)", ((basicblock *) iptr->target)->debug_nr,iptr->target);
-               }
-               break;
+                       count_method_bb_distribution[8]++;
+       }
+#endif /* defined(ENABLE_STATISTICS) */
 
-       case ICMD_TABLESWITCH:
-               s4ptr = (s4*)iptr->val.a;
+       /* everything's ok */
 
-               if (deadcode || !iptr->target) {
-                       printf(" %d;", *s4ptr);
-               }
-               else {
-                       tptr = (void **) iptr->target;
-                       printf(" L%03d;", ((basicblock *) *tptr)->debug_nr); 
-                       tptr++;
-               }
+       return true;
 
-               s4ptr++;         /* skip default */
-               j = *s4ptr++;                               /* low     */
-               j = *s4ptr++ - j;                           /* high    */
-               while (j >= 0) {
-                       if (deadcode || !*tptr)
-                               printf(" %d", *s4ptr++);
-                       else {
-                               printf(" L%03d", ((basicblock *) *tptr)->debug_nr);
-                               tptr++;
-                       }
-                       j--;
-               }
-               break;
+#if defined(ENABLE_VERIFIER)
 
-       case ICMD_LOOKUPSWITCH:
-               s4ptr = (s4*)iptr->val.a;
+throw_stack_underflow:
+       exceptions_throw_verifyerror(m, "Unable to pop operand off an empty stack");
+       return false;
 
-               if (deadcode || !iptr->target) {
-                       printf(" %d;", *s4ptr);
-               }
-               else {
-                       tptr = (void **) iptr->target;
-                       printf(" L%03d;", ((basicblock *) *tptr)->debug_nr);
-                       tptr++;
-               }
-               s4ptr++;                                         /* default */
-               j = *s4ptr++;                                    /* count   */
+throw_stack_overflow:
+       exceptions_throw_verifyerror(m, "Stack size too large");
+       return false;
 
-               while (--j >= 0) {
-                       if (deadcode || !*tptr) {
-                               s4ptr++; /* skip value */
-                               printf(" %d",*s4ptr++);
-                       }
-                       else {
-                               printf(" L%03d", ((basicblock *) *tptr)->debug_nr);
-                               tptr++;
-                       }
-               }
-               break;
+throw_stack_depth_error:
+       exceptions_throw_verifyerror(m, "Stack depth mismatch");
+       return false;
 
-       case ICMD_ARETURN:
-               if (iptr->val.a) {
-                       printf(" (NOT RESOLVED) Class = \"");
-                       utf_display(((unresolved_class *) iptr->val.a)->classref->name);
-                       printf("\"");
-               }
-       }
+throw_stack_type_error:
+       exceptions_throw_verifyerror_for_stack(m, expectedtype);
+       return false;
+
+throw_stack_category_error:
+       exceptions_throw_verifyerror(m, "Attempt to split long or double on the stack");
+       return false;
+
+#endif
 }
-#endif /* !defined(NDEBUG) */
+
 
 
 /*