* Removed all Id tags.
[cacao.git] / src / vm / jit / intrp / codegen.c
index 08e91376f50535d874a4ae5a5a26f35b570e5b27..e49678bea92f6f5d4c51fb37c8c0a4068351a4c4 100644 (file)
@@ -1,6 +1,6 @@
 /* src/vm/jit/intrp/codegen.c - code generator for Interpreter
 
-   Copyright (C) 1996-2005, 2006 R. Grafl, A. Krall, C. Kruegel,
+   Copyright (C) 1996-2005, 2006, 2007 R. Grafl, A. Krall, C. Kruegel,
    C. Oates, R. Obermaisser, M. Platter, M. Probst, S. Ring,
    E. Steiner, C. Thalinger, D. Thuernbeck, P. Tomsich, C. Ullrich,
    J. Wenninger, Institut f. Computersprachen - TU Wien
    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
    02110-1301, USA.
 
-   Contact: cacao@cacaojvm.org
-
-   Authors: Christian Thalinger
-            Anton Ertl
-                       Edwin Steiner
-
-   Changes:
-
-   $Id: codegen.c 4699 2006-03-28 14:52:32Z twisti $
-
 */
 
 
 #include "vm/jit/intrp/codegen.h"
 #include "vm/jit/intrp/intrp.h"
 
+#include "mm/memory.h"
+
 #include "native/native.h"
+
 #include "vm/builtin.h"
-#include "vm/class.h"
 #include "vm/exceptions.h"
 #include "vm/global.h"
-#include "vm/options.h"
 #include "vm/stringlocal.h"
 #include "vm/vm.h"
+
 #include "vm/jit/asmpart.h"
 #include "vm/jit/codegen-common.h"
 #include "vm/jit/dseg.h"
 #include "vm/jit/jit.h"
 #include "vm/jit/parse.h"
 #include "vm/jit/patcher.h"
+#include "vm/jit/stack.h"
+#include "vm/jit/stacktrace.h"
+
+#include "vmcore/class.h"
+#include "vmcore/options.h"
 
 
 #define gen_branch(_inst) { \
   gen_##_inst(cd, 0); \
-  codegen_addreference(cd, (basicblock *) (iptr->target), cd->mcodeptr); \
+  codegen_addreference(cd, BLOCK_OF(iptr->dst.insindex)); \
 }
 
 #define index2offset(_i) (-(_i) * SIZEOF_VOID_P)
@@ -163,6 +160,13 @@ void genarg_af(codegendata *cd1, functionptr a)
        (*mcodepp)++;
 }
 
+void genarg_afi(codegendata *cd1, fieldinfo *a)
+{
+       Inst **mcodepp = (Inst **) &(cd1->mcodeptr);
+       *((fieldinfo **) *mcodepp) = a;
+       (*mcodepp)++;
+}
+
 void genarg_am(codegendata *cd1, methodinfo *a)
 {
        Inst **mcodepp = (Inst **) &(cd1->mcodeptr);
@@ -208,7 +212,8 @@ void genarg_avftbl(codegendata *cd1, vftbl_t *a)
 
 /* include the interpreter generation functions *******************************/
 
-#include "vm/jit/intrp/java-gen.i"
+/* Do not use "java-gen.i", it does not work with builddir. */
+#include <java-gen.i>
 
 
 typedef void (*genfunctionptr) (codegendata *);
@@ -233,9 +238,9 @@ struct builtin_gen builtin_gen_table[] = {
     {BUILTIN_newarray_double,         gen_NEWARRAY_DOUBLE, },
     {BUILTIN_arrayinstanceof,         gen_ARRAYINSTANCEOF, },
 
-#if defined(USE_THREADS)
-    {BUILTIN_monitorenter,            gen_MONITORENTER,    },
-    {BUILTIN_monitorexit,             gen_MONITOREXIT,     },
+#if defined(ENABLE_THREADS)
+    {LOCK_monitor_enter,              gen_MONITORENTER,    },
+    {LOCK_monitor_exit,               gen_MONITOREXIT,     },
 #endif
 
 #if !(SUPPORT_FLOAT && SUPPORT_LONG && SUPPORT_F2L)
@@ -275,21 +280,25 @@ struct builtin_gen builtin_gen_table[] = {
 
 *******************************************************************************/
 
+#define I(value)   iptr[0].sx.val.i = (value); break;
+
 bool intrp_codegen(jitdata *jd)
 {
        methodinfo         *m;
        codegendata        *cd;
        registerdata       *rd;
        s4                  i, len, s1, s2, d;
-       stackptr            src;
        basicblock         *bptr;
        instruction        *iptr;
-       exceptiontable     *ex;
+       exception_entry    *ex;
        u2                  currentline;
        methodinfo         *lm;             /* local methodinfo for ICMD_INVOKE*  */
        unresolved_method  *um;
        builtintable_entry *bte;
        methoddesc         *md;
+       fieldinfo          *fi;
+       unresolved_field   *uf;
+       s4                  fieldtype;
 
        /* get required compiler data */
 
@@ -304,33 +313,42 @@ bool intrp_codegen(jitdata *jd)
        lm = NULL;
        bte = NULL;
 
+       /* determine stackframe size (in units of ptrint slots) */
+
+       cd->stackframesize = m->maxlocals;
+
+#if defined(ENABLE_THREADS)
+       if (checksync && (m->flags & ACC_SYNCHRONIZED))
+               cd->stackframesize += 1;
+#endif
+
        /* create method header */
 
-       (void) dseg_addaddress(cd, m);                          /* MethodPointer  */
-       (void) dseg_adds4(cd, m->maxlocals * SIZEOF_VOID_P);    /* FrameSize      */
+       (void) dseg_add_unique_address(cd, jd->code);
+       (void) dseg_add_unique_s4(cd, cd->stackframesize * SIZEOF_VOID_P);
 
-#if defined(USE_THREADS)
+#if defined(ENABLE_THREADS)
        if (checksync && (m->flags & ACC_SYNCHRONIZED))
-               (void) dseg_adds4(cd, 1);                           /* IsSync         */
+               (void) dseg_add_unique_s4(cd, 1);
        else
 #endif
-               (void) dseg_adds4(cd, 0);                           /* IsSync         */
+               (void) dseg_add_unique_s4(cd, 0);
                                               
-       (void) dseg_adds4(cd, 0);                               /* IsLeaf         */
-       (void) dseg_adds4(cd, 0);                               /* IntSave        */
-       (void) dseg_adds4(cd, 0);                               /* FltSave        */
+       (void) dseg_add_unique_s4(cd, 0);
+       (void) dseg_add_unique_s4(cd, 0);
+       (void) dseg_add_unique_s4(cd, 0);
 
        dseg_addlinenumbertablesize(cd);
 
-       (void) dseg_adds4(cd, cd->exceptiontablelength);        /* ExTableSize    */
+       (void) dseg_add_unique_s4(cd, jd->exceptiontablelength);
 
        /* create exception table */
 
-       for (ex = cd->exceptiontable; ex != NULL; ex = ex->down) {
-               dseg_addtarget(cd, ex->start);
-               dseg_addtarget(cd, ex->end);
-               dseg_addtarget(cd, ex->handler);
-               (void) dseg_addaddress(cd, ex->catchtype.cls);
+       for (ex = jd->exceptiontable; ex != NULL; ex = ex->down) {
+               dseg_add_target(cd, ex->start);
+               dseg_add_target(cd, ex->end);
+               dseg_add_target(cd, ex->handler);
+               (void) dseg_add_unique_address(cd, ex->catchtype.any);
        }
 
 #if 0  
@@ -342,12 +360,16 @@ bool intrp_codegen(jitdata *jd)
 
        gen_BBSTART;
 
-#if defined(USE_THREADS)
+#if defined(ENABLE_THREADS)
        if (checksync && (m->flags & ACC_SYNCHRONIZED)) {
-               if (m->flags & ACC_STATIC)
+               if (m->flags & ACC_STATIC) {
                        gen_ACONST(cd, (java_objectheader *) m->class);
-               else
+               }
+               else {
                        gen_ALOAD(cd, 0);
+                       gen_DUP(cd);
+                       gen_ASTORE(cd, index2offset(m->maxlocals));
+               }
                
                gen_MONITORENTER(cd);
        }                       
@@ -360,27 +382,27 @@ bool intrp_codegen(jitdata *jd)
 
        /* walk through all basic blocks */
 
-       for (bptr = m->basicblocks; bptr != NULL; bptr = bptr->next) {
+       for (bptr = jd->basicblocks; bptr != NULL; bptr = bptr->next) {
 
                bptr->mpc = (s4) (cd->mcodeptr - cd->mcodebase);
 
-               if (bptr->flags >= BBREACHED) {
+               if (bptr->flags != BBDELETED) {
 
                /* walk through all instructions */
                
-               src = bptr->instack;
                len = bptr->icount;
 
                gen_BBSTART;
 
-               for (iptr = bptr->iinstr; len > 0; src = iptr->dst, len--, iptr++) {
+               for (iptr = bptr->iinstr; len > 0; len--, iptr++) {
                        if (iptr->line != currentline) {
-                               dseg_addlinenumber(cd, iptr->line, cd->mcodeptr);
+                               dseg_addlinenumber(cd, iptr->line);
                                currentline = iptr->line;
                        }
 
                MCODECHECK(64);       /* an instruction usually needs < 64 words      */
 
+switch_again:
                switch (iptr->opc) {
 
                case ICMD_INLINE_START:
@@ -400,13 +422,128 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_ICONST:     /* ...  ==> ..., constant                       */
                                      /* op1 = 0, val.i = constant                    */
 
-                       gen_ICONST(cd, iptr->val.i);
+                       /* optimize ICONST (2^x) .. IREM --> IREMPOW2 (const) */
+
+                       if (len >= 2 && iptr[1].opc == ICMD_IREM) {
+                               switch (iptr[0].sx.val.i) {
+       case 0x00000001: case 0x00000002: case 0x00000004: case 0x00000008:
+       case 0x00000010: case 0x00000020: case 0x00000040: case 0x00000080:
+       case 0x00000100: case 0x00000200: case 0x00000400: case 0x00000800:
+       case 0x00001000: case 0x00002000: case 0x00004000: case 0x00008000:
+       case 0x00010000: case 0x00020000: case 0x00040000: case 0x00080000:
+       case 0x00100000: case 0x00200000: case 0x00400000: case 0x00800000:
+       case 0x01000000: case 0x02000000: case 0x04000000: case 0x08000000:
+       case 0x10000000: case 0x20000000: case 0x40000000: case 0x80000000:
+                                       iptr[0].opc = ICMD_IREMPOW2;
+                                       iptr[0].sx.val.i--;
+                                       iptr[1].opc = ICMD_NOP;
+                                       goto switch_again;
+                               }
+                       }
+
+                       /* optimize ICONST (2^x) .. IDIV --> IDIVPOW2 (const) */
+
+                       if (len >= 2 && iptr[1].opc == ICMD_IDIV) {
+                               switch (iptr[0].sx.val.i) {
+                              case 0x00000002: I( 1) case 0x00000004: I( 2) case 0x00000008: I( 3)
+       case 0x00000010: I( 4) case 0x00000020: I( 5) case 0x00000040: I( 6) case 0x00000080: I( 7)
+       case 0x00000100: I( 8) case 0x00000200: I( 9) case 0x00000400: I(10) case 0x00000800: I(11)
+       case 0x00001000: I(12) case 0x00002000: I(13) case 0x00004000: I(14) case 0x00008000: I(15)
+       case 0x00010000: I(16) case 0x00020000: I(17) case 0x00040000: I(18) case 0x00080000: I(19)
+       case 0x00100000: I(20) case 0x00200000: I(21) case 0x00400000: I(22) case 0x00800000: I(23)
+       case 0x01000000: I(24) case 0x02000000: I(25) case 0x04000000: I(26) case 0x08000000: I(27)
+       case 0x10000000: I(28) case 0x20000000: I(29) case 0x40000000: I(30) case 0x80000000: I(31)
+       default: goto dont_opt_IDIVPOW2;
+                               }
+                               iptr[0].opc = ICMD_IDIVPOW2;
+                               iptr[1].opc = ICMD_NOP;
+                               goto switch_again;
+                       }
+dont_opt_IDIVPOW2:
+
+                       /* optimize ICONST .. IF_ICMPxx --> IFxx (const) */
+
+                       if (len >= 2) {
+                               switch (iptr[1].opc) {
+                                       case ICMD_IF_ICMPEQ: iptr[0].opc = ICMD_IFEQ; break;
+                                       case ICMD_IF_ICMPNE: iptr[0].opc = ICMD_IFNE; break;
+                                       case ICMD_IF_ICMPLT: iptr[0].opc = ICMD_IFLT; break;
+                                       case ICMD_IF_ICMPLE: iptr[0].opc = ICMD_IFLE; break;
+                                       case ICMD_IF_ICMPGT: iptr[0].opc = ICMD_IFGT; break;
+                                       case ICMD_IF_ICMPGE: iptr[0].opc = ICMD_IFGE; break;
+                                       default:        goto dont_opt_IFxx;
+                               }
+                               iptr[0].dst.insindex = iptr[1].dst.insindex;
+                               iptr[1].opc = ICMD_NOP;
+                               goto switch_again;
+                       }
+dont_opt_IFxx:
+
+                       gen_ICONST(cd, iptr->sx.val.i);
                        break;
 
                case ICMD_LCONST:     /* ...  ==> ..., constant                       */
                                      /* op1 = 0, val.l = constant                    */
 
-                       gen_LCONST(cd, iptr->val.l);
+                       /* optimize LCONST (2^x) .. LREM --> LREMPOW2 (const) */
+
+                       if (len >= 2 && iptr[1].opc == ICMD_LREM) {
+                               switch (iptr[0].sx.val.l) {
+       case 0x00000001: case 0x00000002: case 0x00000004: case 0x00000008:
+       case 0x00000010: case 0x00000020: case 0x00000040: case 0x00000080:
+       case 0x00000100: case 0x00000200: case 0x00000400: case 0x00000800:
+       case 0x00001000: case 0x00002000: case 0x00004000: case 0x00008000:
+       case 0x00010000: case 0x00020000: case 0x00040000: case 0x00080000:
+       case 0x00100000: case 0x00200000: case 0x00400000: case 0x00800000:
+       case 0x01000000: case 0x02000000: case 0x04000000: case 0x08000000:
+       case 0x10000000: case 0x20000000: case 0x40000000: case 0x80000000:
+                                       iptr[0].opc = ICMD_LREMPOW2;
+                                       iptr[0].sx.val.l--;
+                                       iptr[1].opc = ICMD_NOP;
+                                       goto switch_again;
+                               }
+                       }
+
+                       /* optimize LCONST (2^x) .. LDIV --> LDIVPOW2 (const) */
+
+                       if (len >= 2 && iptr[1].opc == ICMD_LDIV) {
+                               switch (iptr[0].sx.val.l) {
+                              case 0x00000002: I( 1) case 0x00000004: I( 2) case 0x00000008: I( 3)
+       case 0x00000010: I( 4) case 0x00000020: I( 5) case 0x00000040: I( 6) case 0x00000080: I( 7)
+       case 0x00000100: I( 8) case 0x00000200: I( 9) case 0x00000400: I(10) case 0x00000800: I(11)
+       case 0x00001000: I(12) case 0x00002000: I(13) case 0x00004000: I(14) case 0x00008000: I(15)
+       case 0x00010000: I(16) case 0x00020000: I(17) case 0x00040000: I(18) case 0x00080000: I(19)
+       case 0x00100000: I(20) case 0x00200000: I(21) case 0x00400000: I(22) case 0x00800000: I(23)
+       case 0x01000000: I(24) case 0x02000000: I(25) case 0x04000000: I(26) case 0x08000000: I(27)
+       case 0x10000000: I(28) case 0x20000000: I(29) case 0x40000000: I(30) case 0x80000000: I(31)
+       default: goto dont_opt_LDIVPOW2;
+                               }
+                               iptr[0].opc = ICMD_LDIVPOW2;
+                               iptr[1].opc = ICMD_NOP;
+                               goto switch_again;
+                       }
+dont_opt_LDIVPOW2:
+
+                       /* optimize LCONST .. LCMP .. IFxx (0) --> IF_Lxx */
+
+                       if (len >= 3 && iptr[1].opc == ICMD_LCMP && iptr[2].sx.val.i == 0) {
+                               switch (iptr[2].opc) {
+                                       case ICMD_IFEQ: iptr[0].opc = ICMD_IF_LEQ; break;
+                                       case ICMD_IFNE: iptr[0].opc = ICMD_IF_LNE; break;
+                                       case ICMD_IFLT: iptr[0].opc = ICMD_IF_LLT; break;
+                                       case ICMD_IFLE: iptr[0].opc = ICMD_IF_LLE; break;
+                                       case ICMD_IFGT: iptr[0].opc = ICMD_IF_LGT; break;
+                                       case ICMD_IFGE: iptr[0].opc = ICMD_IF_LGE; break;
+                                       default:        goto dont_opt_IF_Lxx;
+                               }
+                               iptr[0].dst.insindex = iptr[2].dst.insindex;
+                               iptr[1].opc = ICMD_NOP;
+                               iptr[2].opc = ICMD_NOP;
+                               goto switch_again;
+                       }
+dont_opt_IF_Lxx:
+
+                       gen_LCONST(cd, iptr->sx.val.l);
                        break;
 
                case ICMD_FCONST:     /* ...  ==> ..., constant                       */
@@ -414,7 +551,7 @@ bool intrp_codegen(jitdata *jd)
                        {
                                ptrint fi;
 
-                               vm_f2Cell(iptr->val.f, fi);
+                               vm_f2Cell(iptr->sx.val.f, fi);
                                gen_ICONST(cd, fi);
                        }
                        break;
@@ -422,16 +559,16 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_DCONST:     /* ...  ==> ..., constant                       */
                                      /* op1 = 0, val.d = constant                    */
 
-                       gen_LCONST(cd, *(s8 *)&(iptr->val.d));
+                       gen_LCONST(cd, *(s8 *)&(iptr->sx.val.d));
                        break;
 
                case ICMD_ACONST:     /* ...  ==> ..., constant                       */
                                      /* op1 = 0, val.a = constant                    */
 
-                       if ((iptr->target != NULL) && (iptr->val.a == NULL))
-                               gen_PATCHER_ACONST(cd, NULL, iptr->target);
+                       if (INSTRUCTION_IS_UNRESOLVED(iptr))
+                               gen_PATCHER_ACONST(cd, NULL, iptr->sx.val.c.ref);
                        else
-                               gen_ACONST(cd, iptr->val.a);
+                               gen_ACONST(cd, iptr->sx.val.anyptr);
                        break;
 
 
@@ -440,80 +577,71 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_ILOAD:      /* ...  ==> ..., content of local variable      */
                                      /* op1 = local variable                         */
 
-                       gen_ILOAD(cd, index2offset(iptr->op1));
+                       gen_ILOAD(cd, index2offset(iptr->s1.varindex));
                        break;
 
                case ICMD_LLOAD:      /* ...  ==> ..., content of local variable      */
                                      /* op1 = local variable                         */
 
-                       gen_LLOAD(cd, index2offset(iptr->op1));
+                       gen_LLOAD(cd, index2offset(iptr->s1.varindex));
                        break;
 
                case ICMD_ALOAD:      /* ...  ==> ..., content of local variable      */
                                      /* op1 = local variable                         */
 
-                       gen_ALOAD(cd, index2offset(iptr->op1));
+                       gen_ALOAD(cd, index2offset(iptr->s1.varindex));
                        break;
 
                case ICMD_FLOAD:      /* ...  ==> ..., content of local variable      */
                                      /* op1 = local variable                         */
 
-                       gen_ILOAD(cd, index2offset(iptr->op1));
+                       gen_ILOAD(cd, index2offset(iptr->s1.varindex));
                        break;
 
                case ICMD_DLOAD:      /* ...  ==> ..., content of local variable      */
                                      /* op1 = local variable                         */
 
-                       gen_LLOAD(cd, index2offset(iptr->op1));
+                       gen_LLOAD(cd, index2offset(iptr->s1.varindex));
                        break;
 
 
                case ICMD_ISTORE:     /* ..., value  ==> ...                          */
                                      /* op1 = local variable                         */
 
-                       gen_ISTORE(cd, index2offset(iptr->op1));
+                       gen_ISTORE(cd, index2offset(iptr->dst.varindex));
                        break;
 
                case ICMD_LSTORE:     /* ..., value  ==> ...                          */
                                      /* op1 = local variable                         */
 
-                       gen_LSTORE(cd, index2offset(iptr->op1));
+                       gen_LSTORE(cd, index2offset(iptr->dst.varindex));
                        break;
 
                case ICMD_ASTORE:     /* ..., value  ==> ...                          */
                                      /* op1 = local variable                         */
 
-                       gen_ASTORE(cd, index2offset(iptr->op1));
+                       gen_ASTORE(cd, index2offset(iptr->dst.varindex));
                        break;
 
 
                case ICMD_FSTORE:     /* ..., value  ==> ...                          */
                                      /* op1 = local variable                         */
 
-                       gen_ISTORE(cd, index2offset(iptr->op1));
+                       gen_ISTORE(cd, index2offset(iptr->dst.varindex));
                        break;
 
                case ICMD_DSTORE:     /* ..., value  ==> ...                          */
                                      /* op1 = local variable                         */
 
-                       gen_LSTORE(cd, index2offset(iptr->op1));
+                       gen_LSTORE(cd, index2offset(iptr->dst.varindex));
                        break;
 
 
                /* pop/dup/swap operations ********************************************/
 
-               /* attention: double and longs are only one entry in CACAO ICMDs      */
-
-               /* stack.c changes stack manipulation operations to treat
-                  longs/doubles as occupying a single slot.  Here we are
-                  undoing that (and only those things that stack.c did). */
-
                case ICMD_POP:        /* ..., value  ==> ...                          */
 
-                       if (IS_2_WORD_TYPE(src->type))
-                               gen_POP2(cd);
-                       else
-                               gen_POP(cd);
+                       gen_POP(cd);
                        break;
 
                case ICMD_POP2:       /* ..., value, value  ==> ...                   */
@@ -523,35 +651,17 @@ bool intrp_codegen(jitdata *jd)
 
                case ICMD_DUP:        /* ..., a ==> ..., a, a                         */
 
-                       if (IS_2_WORD_TYPE(src->type))
-                               gen_DUP2(cd);
-                       else
-                               gen_DUP(cd);
+                       gen_DUP(cd);
                        break;
 
                case ICMD_DUP_X1:     /* ..., a, b ==> ..., b, a, b                   */
 
-                       if (IS_2_WORD_TYPE(src->type)) {
-                               if (IS_2_WORD_TYPE(src->prev->type)) {
-                                       gen_DUP2_X2(cd);
-                               } else {
-                                       gen_DUP2_X1(cd);
-                               }
-                       } else {
-                               if (IS_2_WORD_TYPE(src->prev->type)) {
-                                       gen_DUP_X2(cd);
-                               } else {
-                                       gen_DUP_X1(cd);
-                               }
-                       }
+                       gen_DUP_X1(cd);
                        break;
 
                case ICMD_DUP_X2:     /* ..., a, b, c ==> ..., c, a, b, c             */
 
-                       if (IS_2_WORD_TYPE(src->type)) {
-                               gen_DUP2_X2(cd);
-                       } else
-                               gen_DUP_X2(cd);
+                       gen_DUP_X2(cd);
                        break;
 
                case ICMD_DUP2:       /* ..., a, b ==> ..., a, b, a, b                */
@@ -561,10 +671,7 @@ bool intrp_codegen(jitdata *jd)
 
                case ICMD_DUP2_X1:    /* ..., a, b, c ==> ..., b, c, a, b, c          */
 
-                       if (IS_2_WORD_TYPE(src->prev->prev->type))
-                               gen_DUP2_X2(cd);
-                       else
-                               gen_DUP2_X1(cd);
+                       gen_DUP2_X1(cd);
                        break;
 
                case ICMD_DUP2_X2:    /* ..., a, b, c, d ==> ..., c, d, a, b, c, d    */
@@ -621,71 +728,31 @@ bool intrp_codegen(jitdata *jd)
                        gen_IADD(cd);
                        break;
 
-               case ICMD_IADDCONST:  /* ..., value  ==> ..., value + constant        */
-                                     /* val.i = constant                             */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_IADD(cd);
-                       break;
-
                case ICMD_LADD:       /* ..., val1, val2  ==> ..., val1 + val2        */
 
                        gen_LADD(cd);
                        break;
 
-               case ICMD_LADDCONST:  /* ..., value  ==> ..., value + constant        */
-                                     /* val.l = constant                             */
-
-                       gen_LCONST(cd, iptr->val.l);
-                       gen_LADD(cd);
-                       break;
-
                case ICMD_ISUB:       /* ..., val1, val2  ==> ..., val1 - val2        */
 
                        gen_ISUB(cd);
                        break;
 
-               case ICMD_ISUBCONST:  /* ..., value  ==> ..., value + constant        */
-                                     /* val.i = constant                             */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_ISUB(cd);
-                       break;
-
                case ICMD_LSUB:       /* ..., val1, val2  ==> ..., val1 - val2        */
 
                        gen_LSUB(cd);
                        break;
 
-               case ICMD_LSUBCONST:  /* ..., value  ==> ..., value - constant        */
-                                     /* val.l = constant                             */
-
-                       gen_LCONST(cd, iptr->val.l);
-                       gen_LSUB(cd);
-                       break;
-
                case ICMD_IMUL:       /* ..., val1, val2  ==> ..., val1 * val2        */
 
                        gen_IMUL(cd);
                        break;
 
-               case ICMD_IMULCONST:  /* ..., val1, val2  ==> ..., val1 * val2        */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_IMUL(cd);
-                       break;
-
                case ICMD_LMUL:       /* ..., val1, val2  ==> ..., val1 * val2        */
 
                        gen_LMUL(cd);
                        break;
 
-               case ICMD_LMULCONST:  /* ..., val1, val2  ==> ..., val1 * val2        */
-
-                       gen_LCONST(cd, iptr->val.l);
-                       gen_LMUL(cd);
-                       break;
-
                case ICMD_IDIV:       /* ..., val1, val2  ==> ..., val1 / val2        */
 
                        gen_IDIV(cd);
@@ -709,25 +776,25 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_IDIVPOW2:   /* ..., value  ==> ..., value << constant       */
                                      /* val.i = constant                             */
                                      
-                       gen_IDIVPOW2(cd, iptr->val.i);
+                       gen_IDIVPOW2(cd, iptr->sx.val.i);
                        break;
 
                case ICMD_IREMPOW2:   /* ..., value  ==> ..., value % constant        */
                                      /* val.i = constant                             */
 
-                       gen_IREMPOW2(cd, iptr->val.i);
+                       gen_IREMPOW2(cd, iptr->sx.val.i);
                        break;
 
                case ICMD_LDIVPOW2:   /* ..., value  ==> ..., value << constant       */
                                      /* val.i = constant                             */
                                      
-                       gen_LDIVPOW2(cd, iptr->val.i);
+                       gen_LDIVPOW2(cd, iptr->sx.val.i);
                        break;
 
                case ICMD_LREMPOW2:   /* ..., value  ==> ..., value % constant        */
                                      /* val.l = constant                             */
 
-                       gen_LREMPOW2(cd, iptr->val.i);
+                       gen_LREMPOW2(cd, iptr->sx.val.i);
                        break;
 
                case ICMD_ISHL:       /* ..., val1, val2  ==> ..., val1 << val2       */
@@ -735,148 +802,82 @@ bool intrp_codegen(jitdata *jd)
                        gen_ISHL(cd);
                        break;
 
-               case ICMD_ISHLCONST:  /* ..., value  ==> ..., value << constant       */
-                                     /* val.i = constant                             */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_ISHL(cd);
-                       break;
-
                case ICMD_ISHR:       /* ..., val1, val2  ==> ..., val1 >> val2       */
 
                        gen_ISHR(cd);
                        break;
 
-               case ICMD_ISHRCONST:  /* ..., value  ==> ..., value >> constant       */
-                                     /* val.i = constant                             */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_ISHR(cd);
-                       break;
-
                case ICMD_IUSHR:      /* ..., val1, val2  ==> ..., val1 >>> val2      */
 
                        gen_IUSHR(cd);
                        break;
 
-               case ICMD_IUSHRCONST: /* ..., value  ==> ..., value >>> constant      */
-                                     /* val.i = constant                             */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_IUSHR(cd);
-                       break;
-
                case ICMD_LSHL:       /* ..., val1, val2  ==> ..., val1 << val2       */
 
                        gen_LSHL(cd);
                        break;
 
-               case ICMD_LSHLCONST:  /* ..., value  ==> ..., value << constant       */
-                                     /* val.i = constant                             */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_LSHL(cd);
-                       break;
-
                case ICMD_LSHR:       /* ..., val1, val2  ==> ..., val1 >> val2       */
 
                        gen_LSHR(cd);
                        break;
 
-               case ICMD_LSHRCONST:  /* ..., value  ==> ..., value >> constant       */
-                                     /* val.i = constant                             */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_LSHR(cd);
-                       break;
-
                case ICMD_LUSHR:      /* ..., val1, val2  ==> ..., val1 >>> val2      */
 
                        gen_LUSHR(cd);
                        break;
 
-               case ICMD_LUSHRCONST: /* ..., value  ==> ..., value >>> constant      */
-                                     /* val.i = constant                             */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_LUSHR(cd);
-                       break;
-
                case ICMD_IAND:       /* ..., val1, val2  ==> ..., val1 & val2        */
 
                        gen_IAND(cd);
                        break;
 
-               case ICMD_IANDCONST:  /* ..., value  ==> ..., value & constant        */
-                                     /* val.i = constant                             */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_IAND(cd);
-                       break;
-
                case ICMD_LAND:       /* ..., val1, val2  ==> ..., val1 & val2        */
 
                        gen_LAND(cd);
                        break;
 
-               case ICMD_LANDCONST:  /* ..., value  ==> ..., value & constant        */
-                                     /* val.l = constant                             */
-
-                       gen_LCONST(cd, iptr->val.l);
-                       gen_LAND(cd);
-                       break;
-
                case ICMD_IOR:        /* ..., val1, val2  ==> ..., val1 | val2        */
 
                        gen_IOR(cd);
                        break;
 
-               case ICMD_IORCONST:   /* ..., value  ==> ..., value | constant        */
-                                     /* val.i = constant                             */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_IOR(cd);
-                       break;
-
                case ICMD_LOR:        /* ..., val1, val2  ==> ..., val1 | val2        */
 
                        gen_LOR(cd);
                        break;
 
-               case ICMD_LORCONST:   /* ..., value  ==> ..., value | constant        */
-                                     /* val.l = constant                             */
-
-                       gen_LCONST(cd, iptr->val.l);
-                       gen_LOR(cd);
-                       break;
-
                case ICMD_IXOR:       /* ..., val1, val2  ==> ..., val1 ^ val2        */
 
                        gen_IXOR(cd);
                        break;
 
-               case ICMD_IXORCONST:  /* ..., value  ==> ..., value ^ constant        */
-                                     /* val.i = constant                             */
-
-                       gen_ICONST(cd, iptr->val.i);
-                       gen_IXOR(cd);
-                       break;
-
                case ICMD_LXOR:       /* ..., val1, val2  ==> ..., val1 ^ val2        */
 
                        gen_LXOR(cd);
                        break;
 
-               case ICMD_LXORCONST:  /* ..., value  ==> ..., value ^ constant        */
-                                     /* val.l = constant                             */
-
-                       gen_LCONST(cd, iptr->val.l);
-                       gen_LXOR(cd);
-                       break;
-
 
                case ICMD_LCMP:       /* ..., val1, val2  ==> ..., val1 cmp val2      */
 
+                       /* optimize LCMP .. IFxx (0) --> IF_LCMPxx */
+
+                       if (len >= 2 && iptr[1].sx.val.i == 0) {
+                               switch (iptr[1].opc) {
+                                       case ICMD_IFEQ: iptr[0].opc = ICMD_IF_LCMPEQ; break;
+                                       case ICMD_IFNE: iptr[0].opc = ICMD_IF_LCMPNE; break;
+                                       case ICMD_IFLT: iptr[0].opc = ICMD_IF_LCMPLT; break;
+                                       case ICMD_IFLE: iptr[0].opc = ICMD_IF_LCMPLE; break;
+                                       case ICMD_IFGT: iptr[0].opc = ICMD_IF_LCMPGT; break;
+                                       case ICMD_IFGE: iptr[0].opc = ICMD_IF_LCMPGE; break;
+                                       default:        goto dont_opt_IF_LCMPxx;
+                               }
+                               iptr[0].dst.insindex = iptr[1].dst.insindex;
+                               iptr[1].opc = ICMD_NOP;
+                               goto switch_again;
+                       }
+dont_opt_IF_LCMPxx:
+
                        gen_LCMP(cd);
                        break;
 
@@ -884,7 +885,7 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_IINC:       /* ..., value  ==> ..., value + constant        */
                                      /* op1 = variable, val.i = constant             */
 
-                       gen_IINC(cd, index2offset(iptr->op1), iptr->val.i);
+                       gen_IINC(cd, index2offset(iptr->s1.varindex), iptr->sx.val.i);
                        break;
 
 
@@ -1101,166 +1102,190 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_GETSTATIC:  /* ...  ==> ..., value                          */
                                      /* op1 = type, val.a = field address            */
 
-                       {
-                       fieldinfo *fi = iptr->val.a;
-                       unresolved_field *uf = iptr->target;
+                       if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
+                               fi        = NULL;
+                               uf        = iptr->sx.s23.s3.uf;
+                               fieldtype = uf->fieldref->parseddesc.fd->type;
+                       }
+                       else {
+                               fi        = iptr->sx.s23.s3.fmiref->p.field;
+                               uf        = NULL;
+                               fieldtype = fi->type;
+                       }
 
-                       switch (iptr->op1) {
+                       switch (fieldtype) {
                        case TYPE_INT:
-                               if ((fi == NULL) || !CLASS_IS_OR_ALMOST_INITIALIZED(fi->class)) {
+                               if (fi == NULL)
                                        gen_PATCHER_GETSTATIC_INT(cd, 0, uf);
-                               } else {
-                                       gen_GETSTATIC_INT(cd, (u1 *)&(fi->value.i), uf);
-                               }
+                               else if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->class))
+                                       gen_PATCHER_GETSTATIC_CLINIT_INT(cd, 0, fi);
+                               else
+                                       gen_GETSTATIC_INT(cd, (u1 *) &(fi->value.i), fi);
                                break;
                        case TYPE_FLT:
-                               if ((fi == NULL) || !CLASS_IS_OR_ALMOST_INITIALIZED(fi->class)) {
+                               if (fi == NULL)
                                        gen_PATCHER_GETSTATIC_FLOAT(cd, 0, uf);
-                               } else {
-                                       gen_GETSTATIC_FLOAT(cd, (u1 *)&(fi->value.i), uf);
-                               }
+                               else if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->class))
+                                       gen_PATCHER_GETSTATIC_CLINIT_FLOAT(cd, 0, fi);
+                               else
+                                       gen_GETSTATIC_FLOAT(cd, (u1 *) &(fi->value.i), fi);
                                break;
                        case TYPE_LNG:
                        case TYPE_DBL:
-                               if ((fi == NULL) || !CLASS_IS_OR_ALMOST_INITIALIZED(fi->class)) {
+                               if (fi == NULL)
                                        gen_PATCHER_GETSTATIC_LONG(cd, 0, uf);
-                               } else {
-                                       gen_GETSTATIC_LONG(cd, (u1 *)&(fi->value.l), uf);
-                               }
+                               else if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->class))
+                                       gen_PATCHER_GETSTATIC_CLINIT_LONG(cd, 0, fi);
+                               else
+                                       gen_GETSTATIC_LONG(cd, (u1 *) &(fi->value.l), fi);
                                break;
                        case TYPE_ADR:
-                               if ((fi == NULL) || !CLASS_IS_OR_ALMOST_INITIALIZED(fi->class)) {
+                               if (fi == NULL)
                                        gen_PATCHER_GETSTATIC_CELL(cd, 0, uf);
-                               } else {
-                                       gen_GETSTATIC_CELL(cd, (u1 *)&(fi->value.a), uf);
-                               }
+                               else if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->class))
+                                       gen_PATCHER_GETSTATIC_CLINIT_CELL(cd, 0, fi);
+                               else
+                                       gen_GETSTATIC_CELL(cd, (u1 *) &(fi->value.a), fi);
                                break;
                        }
-                       }
                        break;
 
                case ICMD_PUTSTATIC:  /* ..., value  ==> ...                          */
                                      /* op1 = type, val.a = field address            */
 
-                       {
-                       fieldinfo *fi = iptr->val.a;
-                       unresolved_field *uf = iptr->target;
+                       if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
+                               fi        = NULL;
+                               uf        = iptr->sx.s23.s3.uf;
+                               fieldtype = uf->fieldref->parseddesc.fd->type;
+                       }
+                       else {
+                               fi        = iptr->sx.s23.s3.fmiref->p.field;
+                               uf        = NULL;
+                               fieldtype = fi->type;
+                       }
 
-                       switch (iptr->op1) {
+                       switch (fieldtype) {
                        case TYPE_INT:
-                               if ((fi == NULL) || !CLASS_IS_OR_ALMOST_INITIALIZED(fi->class)) {
+                               if (fi == NULL)
                                        gen_PATCHER_PUTSTATIC_INT(cd, 0, uf);
-                               } else {
-                                       gen_PUTSTATIC_INT(cd, (u1 *)&(fi->value.i), uf);
-                               }
+                               else if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->class))
+                                       gen_PATCHER_PUTSTATIC_CLINIT_INT(cd, 0, fi);
+                               else
+                                       gen_PUTSTATIC_INT(cd, (u1 *) &(fi->value.i), fi);
                                break;
                        case TYPE_FLT:
-                               if ((fi == NULL) || !CLASS_IS_OR_ALMOST_INITIALIZED(fi->class)) {
+                               if (fi == NULL)
                                        gen_PATCHER_PUTSTATIC_FLOAT(cd, 0, uf);
-                               } else {
-                                       gen_PUTSTATIC_FLOAT(cd, (u1 *)&(fi->value.i), uf);
-                               }
+                               else if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->class))
+                                       gen_PATCHER_PUTSTATIC_CLINIT_FLOAT(cd, 0, fi);
+                               else
+                                       gen_PUTSTATIC_FLOAT(cd, (u1 *) &(fi->value.i), fi);
                                break;
                        case TYPE_LNG:
                        case TYPE_DBL:
-                               if ((fi == NULL) || !CLASS_IS_OR_ALMOST_INITIALIZED(fi->class)) {
+                               if (fi == NULL)
                                        gen_PATCHER_PUTSTATIC_LONG(cd, 0, uf);
-                               } else {
-                                       gen_PUTSTATIC_LONG(cd, (u1 *)&(fi->value.l), uf);
-                               }
+                               else if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->class))
+                                       gen_PATCHER_PUTSTATIC_CLINIT_LONG(cd, 0, fi);
+                               else
+                                       gen_PUTSTATIC_LONG(cd, (u1 *) &(fi->value.l), fi);
                                break;
                        case TYPE_ADR:
-                               if ((fi == NULL) ||     !CLASS_IS_OR_ALMOST_INITIALIZED(fi->class)) {
+                               if (fi == NULL)
                                        gen_PATCHER_PUTSTATIC_CELL(cd, 0, uf);
-                               } else {
-                                       gen_PUTSTATIC_CELL(cd, (u1 *)&(fi->value.a), uf);
-                               }
+                               else if (!CLASS_IS_OR_ALMOST_INITIALIZED(fi->class))
+                                       gen_PATCHER_PUTSTATIC_CLINIT_CELL(cd, 0, fi);
+                               else
+                                       gen_PUTSTATIC_CELL(cd, (u1 *) &(fi->value.a), fi);
                                break;
                        }
-                       }
                        break;
 
 
                case ICMD_GETFIELD:   /* ...  ==> ..., value                          */
                                      /* op1 = type, val.a = field address            */
 
-                       {
-                       fieldinfo *fi = iptr->val.a;
-                       unresolved_field *uf = iptr->target;
+                       if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
+                               fi        = NULL;
+                               uf        = iptr->sx.s23.s3.uf;
+                               fieldtype = uf->fieldref->parseddesc.fd->type;
+                       }
+                       else {
+                               fi        = iptr->sx.s23.s3.fmiref->p.field;
+                               uf        = NULL;
+                               fieldtype = fi->type;
+                       }
 
-                       switch (iptr->op1) {
+                       switch (fieldtype) {
                        case TYPE_INT:
-                               if (fi == NULL) {
+                               if (fi == NULL)
                                        gen_PATCHER_GETFIELD_INT(cd, 0, uf);
-                               } else {
-                                       gen_GETFIELD_INT(cd, fi->offset, uf);
-                               }
+                               else
+                                       gen_GETFIELD_INT(cd, fi->offset, fi);
                                break;
                        case TYPE_FLT:
-                               if (fi == NULL) {
+                               if (fi == NULL)
                                        gen_PATCHER_GETFIELD_FLOAT(cd, 0, uf);
-                               } else {
-                                       gen_GETFIELD_FLOAT(cd, fi->offset, uf);
-                               }
+                               else
+                                       gen_GETFIELD_FLOAT(cd, fi->offset, fi);
                                break;
                        case TYPE_LNG:
                        case TYPE_DBL:
-                               if (fi == NULL) {
+                               if (fi == NULL)
                                        gen_PATCHER_GETFIELD_LONG(cd, 0, uf);
-                               } else {
-                                       gen_GETFIELD_LONG(cd, fi->offset, uf);
-                               }
+                               else
+                                       gen_GETFIELD_LONG(cd, fi->offset, fi);
                                break;
                        case TYPE_ADR:
-                               if (fi == NULL) {
+                               if (fi == NULL)
                                        gen_PATCHER_GETFIELD_CELL(cd, 0, uf);
-                               } else {
-                                       gen_GETFIELD_CELL(cd, fi->offset, uf);
-                               }
+                               else
+                                       gen_GETFIELD_CELL(cd, fi->offset, fi);
                                break;
                        }
-                       }
                        break;
 
                case ICMD_PUTFIELD:   /* ..., objectref, value  ==> ...               */
                                      /* op1 = type, val.a = field address            */
 
-                       {
-                       fieldinfo *fi = iptr->val.a;
-                       unresolved_field *uf = iptr->target;
+                       if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
+                               fi        = NULL;
+                               uf        = iptr->sx.s23.s3.uf;
+                               fieldtype = uf->fieldref->parseddesc.fd->type;
+                       }
+                       else {
+                               fi        = iptr->sx.s23.s3.fmiref->p.field;
+                               uf        = NULL;
+                               fieldtype = fi->type;
+                       }
 
-                       switch (iptr->op1) {
+                       switch (fieldtype) {
                        case TYPE_INT:
-                               if (fi == NULL) {
+                               if (fi == NULL)
                                        gen_PATCHER_PUTFIELD_INT(cd, 0, uf);
-                               } else {
-                                       gen_PUTFIELD_INT(cd, fi->offset, uf);
-                               }
+                               else
+                                       gen_PUTFIELD_INT(cd, fi->offset, fi);
                                break;
                        case TYPE_FLT:
-                               if (fi == NULL) {
+                               if (fi == NULL)
                                        gen_PATCHER_PUTFIELD_FLOAT(cd, 0, uf);
-                               } else {
-                                       gen_PUTFIELD_FLOAT(cd, fi->offset, uf);
-                               }
+                               else
+                                       gen_PUTFIELD_FLOAT(cd, fi->offset, fi);
                                break;
                        case TYPE_LNG:
                        case TYPE_DBL:
-                               if (fi == NULL) {
+                               if (fi == NULL)
                                        gen_PATCHER_PUTFIELD_LONG(cd, 0, uf);
-                               } else {
-                                       gen_PUTFIELD_LONG(cd, fi->offset, uf);
-                               }
+                               else
+                                       gen_PUTFIELD_LONG(cd, fi->offset, fi);
                                break;
                        case TYPE_ADR:
-                               if (fi == NULL) {
+                               if (fi == NULL)
                                        gen_PATCHER_PUTFIELD_CELL(cd, 0, uf);
-                               } else {
-                                       gen_PUTFIELD_CELL(cd, fi->offset, uf);
-                               }
+                               else
+                                       gen_PUTFIELD_CELL(cd, fi->offset, fi);
                                break;
                        }
-                       }
                        break;
 
 
@@ -1278,13 +1303,15 @@ bool intrp_codegen(jitdata *jd)
 
                case ICMD_JSR:          /* ... ==> ...                                */
                                        /* op1 = target JavaVM pc                     */
-                       gen_branch(JSR);
+
+                       gen_JSR(cd, NULL);
+                       codegen_addreference(cd, BLOCK_OF(iptr->sx.s23.s3.jsrtarget.insindex));
                        break;
-                       
+
                case ICMD_RET:          /* ... ==> ...                                */
                                        /* op1 = local variable                       */
 
-                       gen_RET(cd, index2offset(iptr->op1));
+                       gen_RET(cd, index2offset(iptr->s1.varindex));
                        break;
 
                case ICMD_IFNULL:       /* ..., value ==> ...                         */
@@ -1302,10 +1329,10 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_IFEQ:         /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.i = constant   */
 
-                       if (iptr->val.i == 0) {
+                       if (iptr->sx.val.i == 0) {
                                gen_branch(IFEQ);
                        } else {
-                               gen_ICONST(cd, iptr->val.i);
+                               gen_ICONST(cd, iptr->sx.val.i);
                                gen_branch(IF_ICMPEQ);
                        }
                        break;
@@ -1313,10 +1340,10 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_IFLT:         /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.i = constant   */
 
-                       if (iptr->val.i == 0) {
+                       if (iptr->sx.val.i == 0) {
                                gen_branch(IFLT);
                        } else {
-                               gen_ICONST(cd, iptr->val.i);
+                               gen_ICONST(cd, iptr->sx.val.i);
                                gen_branch(IF_ICMPLT);
                        }
                        break;
@@ -1324,10 +1351,10 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_IFLE:         /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.i = constant   */
 
-                       if (iptr->val.i == 0) {
+                       if (iptr->sx.val.i == 0) {
                                gen_branch(IFLE);
                        } else {
-                               gen_ICONST(cd, iptr->val.i);
+                               gen_ICONST(cd, iptr->sx.val.i);
                                gen_branch(IF_ICMPLE);
                        }
                        break;
@@ -1335,10 +1362,10 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_IFNE:         /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.i = constant   */
 
-                       if (iptr->val.i == 0) {
+                       if (iptr->sx.val.i == 0) {
                                gen_branch(IFNE);
                        } else {
-                               gen_ICONST(cd, iptr->val.i);
+                               gen_ICONST(cd, iptr->sx.val.i);
                                gen_branch(IF_ICMPNE);
                        }
                        break;
@@ -1346,10 +1373,10 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_IFGT:         /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.i = constant   */
 
-                       if (iptr->val.i == 0) {
+                       if (iptr->sx.val.i == 0) {
                                gen_branch(IFGT);
                        } else {
-                               gen_ICONST(cd, iptr->val.i);
+                               gen_ICONST(cd, iptr->sx.val.i);
                                gen_branch(IF_ICMPGT);
                        }
                        break;
@@ -1357,138 +1384,140 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_IFGE:         /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.i = constant   */
 
-                       if (iptr->val.i == 0) {
+                       if (iptr->sx.val.i == 0) {
                                gen_branch(IFGE);
                        } else {
-                               gen_ICONST(cd, iptr->val.i);
+                               gen_ICONST(cd, iptr->sx.val.i);
                                gen_branch(IF_ICMPGE);
                        }
                        break;
 
+
                case ICMD_IF_LEQ:       /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.l = constant   */
 
-                       gen_LCONST(cd, iptr->val.l);
+                       gen_LCONST(cd, iptr->sx.val.l);
                        gen_branch(IF_LCMPEQ);
                        break;
 
                case ICMD_IF_LLT:       /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.l = constant   */
 
-                       gen_LCONST(cd, iptr->val.l);
+                       gen_LCONST(cd, iptr->sx.val.l);
                        gen_branch(IF_LCMPLT);
                        break;
 
                case ICMD_IF_LLE:       /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.l = constant   */
 
-                       gen_LCONST(cd, iptr->val.l);
+                       gen_LCONST(cd, iptr->sx.val.l);
                        gen_branch(IF_LCMPLE);
                        break;
 
                case ICMD_IF_LNE:       /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.l = constant   */
 
-                       gen_LCONST(cd, iptr->val.l);
+                       gen_LCONST(cd, iptr->sx.val.l);
                        gen_branch(IF_LCMPNE);
                        break;
 
                case ICMD_IF_LGT:       /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.l = constant   */
 
-                       gen_LCONST(cd, iptr->val.l);
+                       gen_LCONST(cd, iptr->sx.val.l);
                        gen_branch(IF_LCMPGT);
                        break;
 
                case ICMD_IF_LGE:       /* ..., value ==> ...                         */
                                        /* op1 = target JavaVM pc, val.l = constant   */
 
-                       gen_LCONST(cd, iptr->val.l);
+                       gen_LCONST(cd, iptr->sx.val.l);
                        gen_branch(IF_LCMPGE);
                        break;
 
-               case ICMD_IF_ICMPEQ:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_LCMPEQ:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_ICMPEQ);
+                       gen_branch(IF_LCMPEQ);
                        break;
 
-               case ICMD_IF_LCMPEQ:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_LCMPNE:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_LCMPEQ);
+                       gen_branch(IF_LCMPNE);
                        break;
 
-               case ICMD_IF_ACMPEQ:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_LCMPLT:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_ACMPEQ);
+                       gen_branch(IF_LCMPLT);
                        break;
 
-               case ICMD_IF_ICMPNE:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_LCMPGT:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_ICMPNE);
+                       gen_branch(IF_LCMPGT);
                        break;
 
-               case ICMD_IF_LCMPNE:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_LCMPLE:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_LCMPNE);
+                       gen_branch(IF_LCMPLE);
                        break;
 
-               case ICMD_IF_ACMPNE:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_LCMPGE:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_ACMPNE);
+                       gen_branch(IF_LCMPGE);
                        break;
 
-               case ICMD_IF_ICMPLT:    /* ..., value, value ==> ...                  */
+
+               case ICMD_IF_ICMPEQ:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_ICMPLT);
+                       gen_branch(IF_ICMPEQ);
                        break;
 
-               case ICMD_IF_LCMPLT:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_ACMPEQ:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_LCMPLT);
+                       gen_branch(IF_ACMPEQ);
                        break;
 
-               case ICMD_IF_ICMPGT:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_ICMPNE:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_ICMPGT);
+                       gen_branch(IF_ICMPNE);
                        break;
 
-               case ICMD_IF_LCMPGT:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_ACMPNE:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_LCMPGT);
+                       gen_branch(IF_ACMPNE);
                        break;
 
-               case ICMD_IF_ICMPLE:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_ICMPLT:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_ICMPLE);
+                       gen_branch(IF_ICMPLT);
                        break;
 
-               case ICMD_IF_LCMPLE:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_ICMPGT:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_LCMPLE);
+                       gen_branch(IF_ICMPGT);
                        break;
 
-               case ICMD_IF_ICMPGE:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_ICMPLE:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_ICMPGE);
+                       gen_branch(IF_ICMPLE);
                        break;
 
-               case ICMD_IF_LCMPGE:    /* ..., value, value ==> ...                  */
+               case ICMD_IF_ICMPGE:    /* ..., value, value ==> ...                  */
                                        /* op1 = target JavaVM pc                     */
 
-                       gen_branch(IF_LCMPGE);
+                       gen_branch(IF_ICMPGE);
                        break;
 
 
@@ -1496,12 +1525,12 @@ bool intrp_codegen(jitdata *jd)
                case ICMD_IRETURN:      /* ..., retvalue ==> ...                      */
                case ICMD_FRETURN:      /* ..., retvalue ==> ...                      */
 
-#if defined(USE_THREADS)
+#if defined(ENABLE_THREADS)
                        if (checksync && (m->flags & ACC_SYNCHRONIZED)) {
                                if (m->flags & ACC_STATIC) {
                                        gen_ACONST(cd, (java_objectheader *) m->class);
                                } else {
-                                       gen_ALOAD(cd, 0);
+                                       gen_ALOAD(cd, index2offset(m->maxlocals));
                                }
                                gen_MONITOREXIT(cd);
                        }
@@ -1509,18 +1538,18 @@ bool intrp_codegen(jitdata *jd)
                        if (opt_verbosecall)
                                gen_TRACERETURN(cd, m);
 
-                       gen_IRETURN(cd, index2offset(cd->maxlocals));
+                       gen_IRETURN(cd, index2offset(cd->stackframesize));
                        break;
 
                case ICMD_LRETURN:      /* ..., retvalue ==> ...                      */
                case ICMD_DRETURN:      /* ..., retvalue ==> ...                      */
 
-#if defined(USE_THREADS)
+#if defined(ENABLE_THREADS)
                        if (checksync && (m->flags & ACC_SYNCHRONIZED)) {
                                if (m->flags & ACC_STATIC) {
                                        gen_ACONST(cd, (java_objectheader *) m->class);
                                } else {
-                                       gen_ALOAD(cd, 0);
+                                       gen_ALOAD(cd, index2offset(m->maxlocals));
                                }
                                gen_MONITOREXIT(cd);
                        }
@@ -1528,17 +1557,17 @@ bool intrp_codegen(jitdata *jd)
                        if (opt_verbosecall)
                                gen_TRACELRETURN(cd, m);
 
-                       gen_LRETURN(cd, index2offset(cd->maxlocals));
+                       gen_LRETURN(cd, index2offset(cd->stackframesize));
                        break;
 
                case ICMD_RETURN:       /* ...  ==> ...                               */
 
-#if defined(USE_THREADS)
+#if defined(ENABLE_THREADS)
                        if (checksync && (m->flags & ACC_SYNCHRONIZED)) {
                                if (m->flags & ACC_STATIC) {
                                        gen_ACONST(cd, (java_objectheader *) m->class);
                                } else {
-                                       gen_ALOAD(cd, 0);
+                                       gen_ALOAD(cd, index2offset(m->maxlocals));
                                }
                                gen_MONITOREXIT(cd);
                        }
@@ -1546,20 +1575,19 @@ bool intrp_codegen(jitdata *jd)
                        if (opt_verbosecall)
                                gen_TRACERETURN(cd, m);
 
-                       gen_RETURN(cd, index2offset(cd->maxlocals));
+                       gen_RETURN(cd, index2offset(cd->stackframesize));
                        break;
 
 
                case ICMD_TABLESWITCH:  /* ..., index ==> ...                         */
                        {
-                       s4 i, l, *s4ptr;
-                       void **tptr;
+                       s4 i, l;
+                       branch_target_t *table;
 
-                       tptr = (void **) iptr->target;
+                       table = iptr->dst.table;
 
-                       s4ptr = iptr->val.a;
-                       l = s4ptr[1];                          /* low     */
-                       i = s4ptr[2];                          /* high    */
+                       l = iptr->sx.s23.s2.tablelow;
+                       i = iptr->sx.s23.s3.tablehigh;
                        
                        i = i - l + 1;
 
@@ -1570,63 +1598,65 @@ bool intrp_codegen(jitdata *jd)
 
                        /* actually -3 cells offset */
 
-                       dseg_adddata(cd, (cd->mcodeptr - 2 * sizeof(Inst)));
-                       codegen_addreference(cd, (basicblock *) tptr[0], cd->mcodeptr);
+                       cd->mcodeptr = (u1 *) cd->mcodeptr - 2 * sizeof(Inst);
+                       dseg_adddata(cd);
+                       cd->mcodeptr = (u1 *) cd->mcodeptr + 2 * sizeof(Inst);
+
+                       codegen_addreference(cd, BLOCK_OF(table[0].insindex));
 
                        /* build jump table top down and use address of lowest entry */
 
-                       tptr += i;
+                       table += i;
 
                        while (--i >= 0) {
-                               dseg_addtarget(cd, (basicblock *) tptr[0]); 
-                               --tptr;
+                               dseg_add_target(cd, BLOCK_OF(table->insindex)); 
+                               --table;
                        }
                        }
 
-                       /* length of dataseg after last dseg_addtarget is used by load */
+                       /* length of dataseg after last dseg_add_target is used by load */
                        ((ptrint *)(cd->mcodeptr))[-2] = (ptrint) -(cd->dseglen);
                        break;
 
 
                case ICMD_LOOKUPSWITCH: /* ..., key ==> ...                           */
                        {
-                       s4 i, *s4ptr;
-                       void **tptr;
+                       s4 i;
+                       lookup_target_t *lookup;
 
-                       tptr = (void **) iptr->target;
+                       lookup = iptr->dst.lookup;
 
-                       s4ptr = iptr->val.a;
-
-                       /* s4ptr[0] is equal to tptr[0] */
-                       i = s4ptr[1];                          /* count    */
+                       i = iptr->sx.s23.s2.lookupcount;
                        
                        /* arguments: count, datasegment address, table offset in         */
                        /* datasegment, default target                                    */
                        gen_LOOKUPSWITCH(cd, i, NULL, 0, NULL);
-                       dseg_adddata(cd, (cd->mcodeptr - 2*sizeof(Inst))); /* actually -3 cells offset*/
-                       codegen_addreference(cd, (basicblock *) tptr[0], cd->mcodeptr);
 
-                       /* build jump table top down and use address of lowest entry */
+                       /* actually -3 cells offset */
 
-                       tptr += i;
-                       s4ptr += i * 2;
+                       cd->mcodeptr = (u1 *) cd->mcodeptr - 2 * sizeof(Inst);
+                       dseg_adddata(cd);
+                       cd->mcodeptr = (u1 *) cd->mcodeptr + 2 * sizeof(Inst);
+
+                       /* build jump table top down and use address of lowest entry */
 
                        while (--i >= 0) {
-                               dseg_addtarget(cd, (basicblock *) tptr[0]); 
-                               dseg_addaddress(cd, s4ptr[0]);
-                               --tptr;
-                               s4ptr -= 2;
+                               dseg_add_target(cd, BLOCK_OF(lookup->target.insindex)); 
+                               dseg_add_unique_address(cd, lookup->value);
+                               lookup++;
                        }
+
+                       codegen_addreference(cd, BLOCK_OF(iptr->sx.s23.s3.lookupdefault.insindex));
                        }
 
-                       /* length of dataseg after last dseg_addtarget is used by load */
+                       /* length of dataseg after last dseg_add_target is used by load */
                        ((ptrint *)(cd->mcodeptr))[-2] = (ptrint) -(cd->dseglen);
                        break;
 
 
                case ICMD_BUILTIN:      /* ..., arg1, arg2, arg3 ==> ...              */
                                        /* op1 = arg count val.a = builtintable entry */
-                       bte = iptr->val.a;
+                       bte = iptr->sx.s23.s3.bte;
 
                        for (i = 0; i < sizeof(builtin_gen_table)/sizeof(builtin_gen); i++) {
                                builtin_gen *bg = &builtin_gen_table[i];
@@ -1635,70 +1665,68 @@ bool intrp_codegen(jitdata *jd)
                                        goto gen_builtin_end;
                                }
                        }
-                       assert(0);
+
+                       vm_abort(0);
+
                gen_builtin_end:
                        break;
 
                case ICMD_INVOKESTATIC: /* ..., [arg1, [arg2 ...]] ==> ...            */
                                        /* op1 = arg count, val.a = method pointer    */
 
-                       lm = iptr->val.a;
-                       um = iptr->target;
-
-                       if (lm == NULL) {
+                       if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
+                               um = iptr->sx.s23.s3.um;
                                md = um->methodref->parseddesc.md;
                                gen_PATCHER_INVOKESTATIC(cd, 0, md->paramslots, um);
-
-                       } else {
+                       }
+                       else {
+                               lm = iptr->sx.s23.s3.fmiref->p.method;
                                md = lm->parseddesc;
-                               gen_INVOKESTATIC(cd, (Inst **)lm->stubroutine, md->paramslots, um);
+                               gen_INVOKESTATIC(cd, (Inst **) lm->stubroutine, md->paramslots, lm);
                        }
                        break;
 
                case ICMD_INVOKESPECIAL:/* ..., objectref, [arg1, [arg2 ...]] ==> ... */
 
-                       lm = iptr->val.a;
-                       um = iptr->target;
-
-                       if (lm == NULL) {
+                       if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
+                               um = iptr->sx.s23.s3.um;
                                md = um->methodref->parseddesc.md;
                                gen_PATCHER_INVOKESPECIAL(cd, 0, md->paramslots, um);
-
-                       } else {
+                       }
+                       else {
+                               lm = iptr->sx.s23.s3.fmiref->p.method;
                                md = lm->parseddesc;
-                               gen_INVOKESPECIAL(cd, (Inst **)lm->stubroutine, md->paramslots, um);
+                               gen_INVOKESPECIAL(cd, (Inst **) lm->stubroutine, md->paramslots, lm);
                        }
                        break;
 
                case ICMD_INVOKEVIRTUAL:/* op1 = arg count, val.a = method pointer    */
 
-                       lm = iptr->val.a;
-                       um = iptr->target;
-
-                       if (lm == NULL) {
+                       if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
+                               um = iptr->sx.s23.s3.um;
                                md = um->methodref->parseddesc.md;
                                gen_PATCHER_INVOKEVIRTUAL(cd, 0, md->paramslots, um);
-
-                       } else {
+                       }
+                       else {
+                               lm = iptr->sx.s23.s3.fmiref->p.method;
                                md = lm->parseddesc;
 
                                s1 = OFFSET(vftbl_t, table[0]) +
                                        sizeof(methodptr) * lm->vftblindex;
 
-                               gen_INVOKEVIRTUAL(cd, s1, md->paramslots, um);
+                               gen_INVOKEVIRTUAL(cd, s1, md->paramslots, lm);
                        }
                        break;
 
                case ICMD_INVOKEINTERFACE:/* op1 = arg count, val.a = method pointer  */
 
-                       lm = iptr->val.a;
-                       um = iptr->target;
-
-                       if (lm == NULL) {
+                       if (INSTRUCTION_IS_UNRESOLVED(iptr)) {
+                               um = iptr->sx.s23.s3.um;
                                md = um->methodref->parseddesc.md;
                                gen_PATCHER_INVOKEINTERFACE(cd, 0, 0, md->paramslots, um);
-
-                       } else {
+                       }
+                       else {
+                               lm = iptr->sx.s23.s3.fmiref->p.method;
                                md = lm->parseddesc;
 
                                s1 = OFFSET(vftbl_t, interfacetable[0]) -
@@ -1706,7 +1734,7 @@ bool intrp_codegen(jitdata *jd)
 
                                s2 = sizeof(methodptr) * (lm - lm->class->methods);
 
-                               gen_INVOKEINTERFACE(cd, s1, s2, md->paramslots, um);
+                               gen_INVOKEINTERFACE(cd, s1, s2, md->paramslots, lm);
                        }
                        break;
 
@@ -1715,16 +1743,17 @@ bool intrp_codegen(jitdata *jd)
                                      /* op1:   0 == array, 1 == class                */
                                      /* val.a: (classinfo *) superclass              */
 
-                       if (iptr->op1 == 1) {
-                               if (iptr->val.a == NULL)
-                                       gen_PATCHER_CHECKCAST(cd, NULL, iptr->target);
+                       if (!(iptr->flags.bits & INS_FLAG_ARRAY)) {
+                               if (INSTRUCTION_IS_UNRESOLVED(iptr))
+                                       gen_PATCHER_CHECKCAST(cd, NULL, iptr->sx.s23.s3.c.ref);
                                else
-                                       gen_CHECKCAST(cd, iptr->val.a, NULL);
-                       } else {
-                               if (iptr->val.a == NULL)
-                                       gen_PATCHER_ARRAYCHECKCAST(cd, NULL, iptr->target);
+                                       gen_CHECKCAST(cd, iptr->sx.s23.s3.c.cls, NULL);
+                       }
+                       else {
+                               if (INSTRUCTION_IS_UNRESOLVED(iptr))
+                                       gen_PATCHER_ARRAYCHECKCAST(cd, NULL, iptr->sx.s23.s3.c.ref);
                                else
-                                       gen_ARRAYCHECKCAST(cd, iptr->val.a, NULL);
+                                       gen_ARRAYCHECKCAST(cd, iptr->sx.s23.s3.c.cls, NULL);
                        }
                        break;
 
@@ -1732,24 +1761,24 @@ bool intrp_codegen(jitdata *jd)
                                      /* op1:   0 == array, 1 == class                */
                                      /* val.a: (classinfo *) superclass              */
 
-                       if (iptr->val.a == NULL)
-                               gen_PATCHER_INSTANCEOF(cd, NULL, iptr->target);
+                       if (INSTRUCTION_IS_UNRESOLVED(iptr))
+                               gen_PATCHER_INSTANCEOF(cd, NULL, iptr->sx.s23.s3.c.ref);
                        else
-                               gen_INSTANCEOF(cd, iptr->val.a, iptr->target);
+                               gen_INSTANCEOF(cd, iptr->sx.s23.s3.c.cls, iptr->sx.s23.s3.c.ref);
                        break;
 
                case ICMD_MULTIANEWARRAY:/* ..., cnt1, [cnt2, ...] ==> ..., arrayref  */
                                      /* op1 = dimension, val.a = class               */
 
-                       if (iptr->val.a == NULL) {
-                               gen_PATCHER_MULTIANEWARRAY(cd, NULL, iptr->op1, iptr->target);
-                       } else {
-                               gen_MULTIANEWARRAY(cd, iptr->val.a, iptr->op1, NULL);
-                       }
+                       if (INSTRUCTION_IS_UNRESOLVED(iptr))
+                               gen_PATCHER_MULTIANEWARRAY(cd, NULL, iptr->s1.argcount, iptr->sx.s23.s3.c.ref);
+                       else
+                               gen_MULTIANEWARRAY(cd, iptr->sx.s23.s3.c.cls, iptr->s1.argcount, NULL);
                        break;
 
                default:
-                       *exceptionptr = new_internalerror("Unknown ICMD %d", iptr->opc);
+                       exceptions_throw_internalerror("Unknown ICMD %d during code generation",
+                                                                                  iptr->opc);
                        return false;
        } /* switch */
                
@@ -1757,25 +1786,25 @@ bool intrp_codegen(jitdata *jd)
 
        gen_BBEND;
 
-       } /* if (bptr->flags >= BBREACHED) */
+       } /* if (bptr->flags != BBDELETED) */
        } /* for basic block */
 
        dseg_createlinenumbertable(cd);
 
-       codegen_finish(m, cd, (s4) (cd->mcodeptr - cd->mcodebase));
+       codegen_finish(jd);
 
 #ifdef VM_PROFILING
-       vm_block_insert(cd->code->mcode + cd->code->mcodelength);
+       vm_block_insert(jd->code->mcode + jd->code->mcodelength);
 #endif
 
        /* branch resolving (walk through all basic blocks) */
 
-       for (bptr = m->basicblocks; bptr != NULL; bptr = bptr->next) {
+       for (bptr = jd->basicblocks; bptr != NULL; bptr = bptr->next) {
                branchref *brefs;
 
                for (brefs = bptr->branchrefs; brefs != NULL; brefs = brefs->next) {
-                       gen_resolveanybranch(((u1*) cd->code->entrypoint) + brefs->branchpos,
-                                            ((u1 *)cd->code->entrypoint) + bptr->mpc);
+                       gen_resolveanybranch(((u1*) jd->code->entrypoint) + brefs->branchpos,
+                                            ((u1 *)jd->code->entrypoint) + bptr->mpc);
                }
        }
 
@@ -1792,11 +1821,11 @@ bool intrp_codegen(jitdata *jd)
    A stub consists of:
 
    +-------------+
-   | methodinfo* |
+   | codeinfo *  |
    +-------------+ <-- stub
    | codeptr     |
    +-------------+
-   | maxlocals   |
+   | framesize   |  (in ptrint units, does not include return address)
    +-------------+
    | TRANSLATE   |
    +-------------+
@@ -1809,7 +1838,7 @@ bool intrp_codegen(jitdata *jd)
 
 *******************************************************************************/
 
-#define COMPILERSTUB_DATASIZE    1
+#define COMPILERSTUB_DATASIZE    2
 #define COMPILERSTUB_CODESIZE    4
 
 #define COMPILERSTUB_SIZE        COMPILERSTUB_DATASIZE + COMPILERSTUB_CODESIZE
@@ -1821,6 +1850,7 @@ u1 *intrp_createcompilerstub(methodinfo *m)
        Inst        *d;
        codegendata *cd;
        s4           dumpsize;
+       s4           stackframesize;
 
        s = CNEW(Inst, COMPILERSTUB_SIZE);
 
@@ -1829,10 +1859,11 @@ u1 *intrp_createcompilerstub(methodinfo *m)
        d = s;
        s = s + COMPILERSTUB_DATASIZE;
 
-       /* Store the methodinfo* in the same place as in the methodheader
-          for compiled methods. */
+       /* The codeinfo pointer is actually a pointer to the
+          methodinfo. This fakes a codeinfo structure. */
 
        d[0] = (Inst *) m;
+       d[1] = (Inst *) &d[0];                                    /* fake code->m */
 
        /* mark start of dump memory area */
 
@@ -1846,11 +1877,19 @@ u1 *intrp_createcompilerstub(methodinfo *m)
        genarg_ainst(cd, s + 2);
 
        if (m->flags & ACC_NATIVE) {
-               genarg_i(cd, m->parseddesc->paramslots);
-       } else {
-               genarg_i(cd, m->maxlocals);
+               stackframesize = m->parseddesc->paramslots;
+       } 
+       else {
+               stackframesize = m->maxlocals;
+
+#if defined(ENABLE_THREADS)
+               if (checksync && (m->flags & ACC_SYNCHRONIZED))
+                       stackframesize += 1;
+#endif
        }
 
+       genarg_i(cd, stackframesize);
+
        gen_BBSTART;
        gen_TRANSLATE(cd, m);
        gen_BBEND;
@@ -1944,25 +1983,40 @@ static ffi_cif *createnativecif(methodinfo *m, methoddesc *nmd)
 #endif
 
 
-u1 *intrp_createnativestub(functionptr f, methodinfo *m, codegendata *cd,
-                                                  registerdata *rd, methoddesc *nmd)
+u1 *intrp_createnativestub(functionptr f, jitdata *jd, methoddesc *nmd)
 {
+       methodinfo   *m;
+       codeinfo     *code;
+       codegendata  *cd;
+       registerdata *rd;
 #if defined(WITH_FFI)
        ffi_cif *cif;
 #else
        u1      *cif;
 #endif
+       s4            stackframesize;
+
+       /* get required compiler data */
+
+       m    = jd->m;
+       code = jd->code;
+       cd   = jd->cd;
+       rd   = jd->rd;
+
+       /* determine stackframe size (in units of ptrint) */
+
+       stackframesize = nmd->paramslots;
 
        /* create method header */
 
-       (void) dseg_addaddress(cd, m);                          /* MethodPointer  */
-       (void) dseg_adds4(cd, nmd->paramslots * SIZEOF_VOID_P); /* FrameSize      */
-       (void) dseg_adds4(cd, 0);                               /* IsSync         */
-       (void) dseg_adds4(cd, 0);                               /* IsLeaf         */
-       (void) dseg_adds4(cd, 0);                               /* IntSave        */
-       (void) dseg_adds4(cd, 0);                               /* FltSave        */
+       (void) dseg_add_unique_address(cd, code);              /* CodeinfoPointer */
+       (void) dseg_add_unique_s4(cd, stackframesize * SIZEOF_VOID_P); /*FrameSize*/
+       (void) dseg_add_unique_s4(cd, 0);                       /* IsSync         */
+       (void) dseg_add_unique_s4(cd, 0);                       /* IsLeaf         */
+       (void) dseg_add_unique_s4(cd, 0);                       /* IntSave        */
+       (void) dseg_add_unique_s4(cd, 0);                       /* FltSave        */
        dseg_addlinenumbertablesize(cd);
-       (void) dseg_adds4(cd, 0);                               /* ExTableSize    */
+       (void) dseg_add_unique_s4(cd, 0);                       /* ExTableSize    */
 
 #if defined(WITH_FFI)
        /* prepare ffi cif structure */
@@ -1988,13 +2042,13 @@ u1 *intrp_createnativestub(functionptr f, methodinfo *m, codegendata *cd,
 
        gen_BBEND;
 
-       codegen_finish(m, cd, (s4) (cd->mcodeptr - cd->mcodebase));
+       codegen_finish(jd);
 
 #ifdef VM_PROFILING
-       vm_block_insert(cd->code->mcode + cd->code->mcodelength);
+       vm_block_insert(jd->code->mcode + jd->code->mcodelength);
 #endif
 
-       return cd->code->entrypoint;
+       return jd->code->entrypoint;
 }
 
 
@@ -2085,7 +2139,7 @@ Cell *nativecall(functionptr f, methodinfo *m, Cell *sp, Inst *ra, Cell *fp, u1
 
        av_call(alist);
 
-       codegen_finish_native_call(((u1 *) &s) + sizeof(s));
+       *exceptionptr = codegen_finish_native_call(((u1 *) &s) + sizeof(s));
 
        CLEAR_global_sp;
 
@@ -2144,7 +2198,7 @@ Cell *nativecall(functionptr f, methodinfo *m, Cell *sp, Inst *ra, Cell *fp, u1
 
        ffi_call(pcif, FFI_FN(f), endsp, values);
 
-       codegen_finish_native_call(((u1 *) &s) + sizeof(s));
+       *exceptionptr = codegen_finish_native_call(((u1 *) &s) + sizeof(s));
 
        CLEAR_global_sp;
 
@@ -2157,6 +2211,7 @@ u1 *createcalljavafunction(methodinfo *m)
 {
        methodinfo         *tmpm;
        u1                 *entrypoint;
+       jitdata            *jd;
        codegendata        *cd;
        registerdata       *rd;
        s4                  dumpsize;
@@ -2166,28 +2221,41 @@ u1 *createcalljavafunction(methodinfo *m)
 
        dumpsize = dump_size();
 
+       /* allocate memory */
+
+       jd = DNEW(jitdata);
+
        tmpm = DNEW(methodinfo);
        cd = DNEW(codegendata);
        rd = DNEW(registerdata);
 
+       jd->m = tmpm;
+       jd->flags = 0;
+       jd->cd = cd;
+       jd->rd = rd;
+
+       /* Allocate codeinfo memory from the heap as we need to keep them. */
+
+       jd->code = code_codeinfo_new(tmpm); /* XXX check allocation */
+
        /* setup code generation stuff */
 
        MSET(tmpm, 0, u1, sizeof(methodinfo));
 
-       codegen_setup(tmpm, cd);
+       codegen_setup(jd);
 
        md = m->parseddesc;
 
        /* create method header */
 
-       (void) dseg_addaddress(cd, NULL);                       /* MethodPointer  */
-       (void) dseg_adds4(cd, md->paramslots * SIZEOF_VOID_P);  /* FrameSize      */
-       (void) dseg_adds4(cd, 0);                               /* IsSync         */
-       (void) dseg_adds4(cd, 0);                               /* IsLeaf         */
-       (void) dseg_adds4(cd, 0);                               /* IntSave        */
-       (void) dseg_adds4(cd, 0);                               /* FltSave        */
+       (void) dseg_add_unique_address(cd, NULL);              /* CodeinfoPointer */
+       (void) dseg_add_unique_s4(cd, md->paramslots * SIZEOF_VOID_P);/* FrameSize*/
+       (void) dseg_add_unique_s4(cd, 0);                       /* IsSync         */
+       (void) dseg_add_unique_s4(cd, 0);                       /* IsLeaf         */
+       (void) dseg_add_unique_s4(cd, 0);                       /* IntSave        */
+       (void) dseg_add_unique_s4(cd, 0);                       /* FltSave        */
        dseg_addlinenumbertablesize(cd);
-       (void) dseg_adds4(cd, 0);                               /* ExTableSize    */
+       (void) dseg_add_unique_s4(cd, 0);                       /* ExTableSize    */
 
 
        /* generate code */
@@ -2198,12 +2266,12 @@ u1 *createcalljavafunction(methodinfo *m)
 
        gen_BBEND;
 
-       codegen_finish(tmpm, cd, (s4) (cd->mcodeptr - cd->mcodebase));
+       codegen_finish(jd);
 
 #ifdef VM_PROFILING
-       vm_block_insert(cd->code->mcode + cd->code->mcodelength);
+       vm_block_insert(jd->code->mcode + jd->code->mcodelength);
 #endif
-       entrypoint = cd->code->entrypoint;
+       entrypoint = jd->code->entrypoint;
 
        /* release memory */