JavaScriptCore-1218.34.tar.gz

[apple/javascriptcore.git] / jit / JIT.h

diff --git a/jit/JIT.h b/jit/JIT.h
index 83f2c0dfb2165ba4c4b382c42812a70a24de781b..df8a19fd8c50208b251f6050aace8d5bc9a0845b 100644 (file)
--- a/jit/JIT.h
+++ b/jit/JIT.h
@@ -1,5 +1,5 @@
 /*
 /*

- * Copyright (C) 2008 Apple Inc. All rights reserved.
+ * Copyright (C) 2008, 2012, 2013 Apple Inc. All rights reserved.

  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions


@@ -28,6 +28,11 @@
 
 #if ENABLE(JIT)
 
 
 #if ENABLE(JIT)
 

+// Verbose logging of code generation
+#define ENABLE_JIT_VERBOSE 0
+// Verbose logging for OSR-related code.
+#define ENABLE_JIT_VERBOSE_OSR 0
+

 // We've run into some problems where changing the size of the class JIT leads to
 // performance fluctuations.  Try forcing alignment in an attempt to stabalize this.
 #if COMPILER(GCC)
 // We've run into some problems where changing the size of the class JIT leads to
 // performance fluctuations.  Try forcing alignment in an attempt to stabalize this.
 #if COMPILER(GCC)


@@ -36,24 +41,30 @@
 #define JIT_CLASS_ALIGNMENT
 #endif
 
 #define JIT_CLASS_ALIGNMENT
 #endif
 

-#define ASSERT_JIT_OFFSET(actual, expected) ASSERT_WITH_MESSAGE(actual == expected, "JIT Offset \"%s\" should be %d, not %d.\n", #expected, static_cast<int>(actual), static_cast<int>(expected));
+#define ASSERT_JIT_OFFSET(actual, expected) ASSERT_WITH_MESSAGE(actual == expected, "JIT Offset \"%s\" should be %d, not %d.\n", #expected, static_cast<int>(expected), static_cast<int>(actual));

 
 #include "CodeBlock.h"
 
 #include "CodeBlock.h"

+#include "CompactJITCodeMap.h"

 #include "Interpreter.h"
 #include "Interpreter.h"

+#include "JITDisassembler.h"

 #include "JSInterfaceJIT.h"
 #include "JSInterfaceJIT.h"

+#include "LegacyProfiler.h"

 #include "Opcode.h"
 #include "Opcode.h"

-#include "Profiler.h"
+#include "ResultType.h"
+#include "UnusedPointer.h"

 #include <bytecode/SamplingTool.h>
 
 namespace JSC {
 
     class CodeBlock;
 #include <bytecode/SamplingTool.h>
 
 namespace JSC {
 
     class CodeBlock;

+    class FunctionExecutable;

     class JIT;
     class JSPropertyNameIterator;
     class Interpreter;
     class JIT;
     class JSPropertyNameIterator;
     class Interpreter;

+    class JSScope;
+    class JSStack;
+    class MarkedAllocator;

     class Register;
     class Register;

-    class RegisterFile;
-    class ScopeChainNode;

     class StructureChain;
 
     struct CallLinkInfo;
     class StructureChain;
 
     struct CallLinkInfo;


@@ -66,16 +77,16 @@ namespace JSC {
 
     struct CallRecord {
         MacroAssembler::Call from;
 
     struct CallRecord {
         MacroAssembler::Call from;

-        unsigned bytecodeIndex;
+        unsigned bytecodeOffset;

         void* to;
 
         CallRecord()
         {
         }
 
         void* to;
 
         CallRecord()
         {
         }
 

-        CallRecord(MacroAssembler::Call from, unsigned bytecodeIndex, void* to = 0)
+        CallRecord(MacroAssembler::Call from, unsigned bytecodeOffset, void* to = 0)

             : from(from)
             : from(from)

-            , bytecodeIndex(bytecodeIndex)
+            , bytecodeOffset(bytecodeOffset)

             , to(to)
         {
         }
             , to(to)
         {
         }


@@ -83,11 +94,11 @@ namespace JSC {
 
     struct JumpTable {
         MacroAssembler::Jump from;
 
     struct JumpTable {
         MacroAssembler::Jump from;

-        unsigned toBytecodeIndex;
+        unsigned toBytecodeOffset;

 
         JumpTable(MacroAssembler::Jump f, unsigned t)
             : from(f)
 
         JumpTable(MacroAssembler::Jump f, unsigned t)
             : from(f)

-            , toBytecodeIndex(t)
+            , toBytecodeOffset(t)

         {
         }
     };
         {
         }
     };


@@ -119,45 +130,156 @@ namespace JSC {
             StringJumpTable* stringJumpTable;
         } jumpTable;
 
             StringJumpTable* stringJumpTable;
         } jumpTable;
 

-        unsigned bytecodeIndex;
+        unsigned bytecodeOffset;

         unsigned defaultOffset;
 
         unsigned defaultOffset;
 

-        SwitchRecord(SimpleJumpTable* jumpTable, unsigned bytecodeIndex, unsigned defaultOffset, Type type)
+        SwitchRecord(SimpleJumpTable* jumpTable, unsigned bytecodeOffset, unsigned defaultOffset, Type type)

             : type(type)
             : type(type)

-            , bytecodeIndex(bytecodeIndex)
+            , bytecodeOffset(bytecodeOffset)

             , defaultOffset(defaultOffset)
         {
             this->jumpTable.simpleJumpTable = jumpTable;
         }
 
             , defaultOffset(defaultOffset)
         {
             this->jumpTable.simpleJumpTable = jumpTable;
         }
 

-        SwitchRecord(StringJumpTable* jumpTable, unsigned bytecodeIndex, unsigned defaultOffset)
+        SwitchRecord(StringJumpTable* jumpTable, unsigned bytecodeOffset, unsigned defaultOffset)

             : type(String)
             : type(String)

-            , bytecodeIndex(bytecodeIndex)
+            , bytecodeOffset(bytecodeOffset)

             , defaultOffset(defaultOffset)
         {
             this->jumpTable.stringJumpTable = jumpTable;
         }
     };
 
             , defaultOffset(defaultOffset)
         {
             this->jumpTable.stringJumpTable = jumpTable;
         }
     };
 

+    enum PropertyStubGetById_T { PropertyStubGetById };
+    enum PropertyStubPutById_T { PropertyStubPutById };
+

     struct PropertyStubCompilationInfo {
     struct PropertyStubCompilationInfo {

+        enum Type { GetById, PutById } m_type;
+    
+        unsigned bytecodeIndex;

         MacroAssembler::Call callReturnLocation;
         MacroAssembler::Label hotPathBegin;
         MacroAssembler::Call callReturnLocation;
         MacroAssembler::Label hotPathBegin;

-    };
+        MacroAssembler::DataLabelPtr getStructureToCompare;
+        MacroAssembler::PatchableJump getStructureCheck;
+        MacroAssembler::ConvertibleLoadLabel propertyStorageLoad;
+#if USE(JSVALUE64)
+        MacroAssembler::DataLabelCompact getDisplacementLabel;
+#else
+        MacroAssembler::DataLabelCompact getDisplacementLabel1;
+        MacroAssembler::DataLabelCompact getDisplacementLabel2;
+#endif
+        MacroAssembler::Label getPutResult;
+        MacroAssembler::Label getColdPathBegin;
+        MacroAssembler::DataLabelPtr putStructureToCompare;
+#if USE(JSVALUE64)
+        MacroAssembler::DataLabel32 putDisplacementLabel;
+#else
+        MacroAssembler::DataLabel32 putDisplacementLabel1;
+        MacroAssembler::DataLabel32 putDisplacementLabel2;
+#endif

 
 

-    struct StructureStubCompilationInfo {
-        MacroAssembler::DataLabelPtr hotPathBegin;
-        MacroAssembler::Call hotPathOther;
-        MacroAssembler::Call callReturnLocation;
+#if !ASSERT_DISABLED
+        PropertyStubCompilationInfo()
+            : bytecodeIndex(std::numeric_limits<unsigned>::max())
+        {
+        }
+#endif
+
+
+        PropertyStubCompilationInfo(
+            PropertyStubGetById_T, unsigned bytecodeIndex, MacroAssembler::Label hotPathBegin,
+            MacroAssembler::DataLabelPtr structureToCompare,
+            MacroAssembler::PatchableJump structureCheck,
+            MacroAssembler::ConvertibleLoadLabel propertyStorageLoad,
+#if USE(JSVALUE64)
+            MacroAssembler::DataLabelCompact displacementLabel,
+#else
+            MacroAssembler::DataLabelCompact displacementLabel1,
+            MacroAssembler::DataLabelCompact displacementLabel2,
+#endif
+            MacroAssembler::Label putResult)
+            : m_type(GetById)
+            , bytecodeIndex(bytecodeIndex)
+            , hotPathBegin(hotPathBegin)
+            , getStructureToCompare(structureToCompare)
+            , getStructureCheck(structureCheck)
+            , propertyStorageLoad(propertyStorageLoad)
+#if USE(JSVALUE64)
+            , getDisplacementLabel(displacementLabel)
+#else
+            , getDisplacementLabel1(displacementLabel1)
+            , getDisplacementLabel2(displacementLabel2)
+#endif
+            , getPutResult(putResult)
+        {
+        }
+
+        PropertyStubCompilationInfo(
+            PropertyStubPutById_T, unsigned bytecodeIndex, MacroAssembler::Label hotPathBegin,
+            MacroAssembler::DataLabelPtr structureToCompare,
+            MacroAssembler::ConvertibleLoadLabel propertyStorageLoad,
+#if USE(JSVALUE64)
+            MacroAssembler::DataLabel32 displacementLabel
+#else
+            MacroAssembler::DataLabel32 displacementLabel1,
+            MacroAssembler::DataLabel32 displacementLabel2
+#endif
+            )
+            : m_type(PutById)
+            , bytecodeIndex(bytecodeIndex)
+            , hotPathBegin(hotPathBegin)
+            , propertyStorageLoad(propertyStorageLoad)
+            , putStructureToCompare(structureToCompare)
+#if USE(JSVALUE64)
+            , putDisplacementLabel(displacementLabel)
+#else
+            , putDisplacementLabel1(displacementLabel1)
+            , putDisplacementLabel2(displacementLabel2)
+#endif
+        {
+        }
+
+        void slowCaseInfo(PropertyStubGetById_T, MacroAssembler::Label coldPathBegin, MacroAssembler::Call call)
+        {
+            ASSERT(m_type == GetById);
+            callReturnLocation = call;
+            getColdPathBegin = coldPathBegin;
+        }
+
+        void slowCaseInfo(PropertyStubPutById_T, MacroAssembler::Call call)
+        {
+            ASSERT(m_type == PutById);
+            callReturnLocation = call;
+        }
+
+        void copyToStubInfo(StructureStubInfo& info, LinkBuffer &patchBuffer);

     };
 
     };
 

-    struct MethodCallCompilationInfo {
-        MethodCallCompilationInfo(unsigned propertyAccessIndex)
-            : propertyAccessIndex(propertyAccessIndex)
+    struct ByValCompilationInfo {
+        ByValCompilationInfo() { }
+        
+        ByValCompilationInfo(unsigned bytecodeIndex, MacroAssembler::PatchableJump badTypeJump, JITArrayMode arrayMode, MacroAssembler::Label doneTarget)
+            : bytecodeIndex(bytecodeIndex)
+            , badTypeJump(badTypeJump)
+            , arrayMode(arrayMode)
+            , doneTarget(doneTarget)

         {
         }
         {
         }

+        
+        unsigned bytecodeIndex;
+        MacroAssembler::PatchableJump badTypeJump;
+        JITArrayMode arrayMode;
+        MacroAssembler::Label doneTarget;
+        MacroAssembler::Label slowPathTarget;
+        MacroAssembler::Call returnAddress;
+    };

 
 

-        MacroAssembler::DataLabelPtr structureToCompare;
-        unsigned propertyAccessIndex;
+    struct StructureStubCompilationInfo {
+        MacroAssembler::DataLabelPtr hotPathBegin;
+        MacroAssembler::Call hotPathOther;
+        MacroAssembler::Call callReturnLocation;
+        CallLinkInfo::CallType callType;
+        unsigned bytecodeIndex;

     };
 
     // Near calls can only be patched to other JIT code, regular calls can be patched to JIT code or relinked to stub functions.
     };
 
     // Near calls can only be patched to other JIT code, regular calls can be patched to JIT code or relinked to stub functions.


@@ -167,528 +289,370 @@ namespace JSC {
 
     class JIT : private JSInterfaceJIT {
         friend class JITStubCall;
 
     class JIT : private JSInterfaceJIT {
         friend class JITStubCall;

+        friend struct PropertyStubCompilationInfo;

 
         using MacroAssembler::Jump;
         using MacroAssembler::JumpList;
         using MacroAssembler::Label;
 
 
         using MacroAssembler::Jump;
         using MacroAssembler::JumpList;
         using MacroAssembler::Label;
 

-        static const int patchGetByIdDefaultStructure = -1;
+        static const uintptr_t patchGetByIdDefaultStructure = unusedPointer;
+        static const int patchGetByIdDefaultOffset = 0;

         // Magic number - initial offset cannot be representable as a signed 8bit value, or the X86Assembler
         // will compress the displacement, and we may not be able to fit a patched offset.
         // Magic number - initial offset cannot be representable as a signed 8bit value, or the X86Assembler
         // will compress the displacement, and we may not be able to fit a patched offset.

-        static const int patchGetByIdDefaultOffset = 256;
+        static const int patchPutByIdDefaultOffset = 256;

 
     public:
 
     public:

-        static JITCode compile(JSGlobalData* globalData, CodeBlock* codeBlock)
+        static JITCode compile(VM* vm, CodeBlock* codeBlock, JITCompilationEffort effort, CodePtr* functionEntryArityCheck = 0)
+        {
+            return JIT(vm, codeBlock).privateCompile(functionEntryArityCheck, effort);
+        }
+        
+        static void compileClosureCall(VM* vm, CallLinkInfo* callLinkInfo, CodeBlock* callerCodeBlock, CodeBlock* calleeCodeBlock, Structure* expectedStructure, ExecutableBase* expectedExecutable, MacroAssemblerCodePtr codePtr)

         {
         {

-            return JIT(globalData, codeBlock).privateCompile();
+            JIT jit(vm, callerCodeBlock);
+            jit.m_bytecodeOffset = callLinkInfo->codeOrigin.bytecodeIndex;
+            jit.privateCompileClosureCall(callLinkInfo, calleeCodeBlock, expectedStructure, expectedExecutable, codePtr);

         }
 
         }
 

-        static void compileGetByIdProto(JSGlobalData* globalData, CallFrame* callFrame, CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, ReturnAddressPtr returnAddress)
+        static void compileGetByIdProto(VM* vm, CallFrame* callFrame, CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, PropertyOffset cachedOffset, ReturnAddressPtr returnAddress)

         {
         {

-            JIT jit(globalData, codeBlock);
+            JIT jit(vm, codeBlock);
+            jit.m_bytecodeOffset = stubInfo->bytecodeIndex;

             jit.privateCompileGetByIdProto(stubInfo, structure, prototypeStructure, ident, slot, cachedOffset, returnAddress, callFrame);
         }
 
             jit.privateCompileGetByIdProto(stubInfo, structure, prototypeStructure, ident, slot, cachedOffset, returnAddress, callFrame);
         }
 

-        static void compileGetByIdSelfList(JSGlobalData* globalData, CodeBlock* codeBlock, StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset)
+        static void compileGetByIdSelfList(VM* vm, CodeBlock* codeBlock, StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, const Identifier& ident, const PropertySlot& slot, PropertyOffset cachedOffset)

         {
         {

-            JIT jit(globalData, codeBlock);
+            JIT jit(vm, codeBlock);
+            jit.m_bytecodeOffset = stubInfo->bytecodeIndex;

             jit.privateCompileGetByIdSelfList(stubInfo, polymorphicStructures, currentIndex, structure, ident, slot, cachedOffset);
         }
             jit.privateCompileGetByIdSelfList(stubInfo, polymorphicStructures, currentIndex, structure, ident, slot, cachedOffset);
         }

-        static void compileGetByIdProtoList(JSGlobalData* globalData, CallFrame* callFrame, CodeBlock* codeBlock, StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructureList, int currentIndex, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset)
+        static void compileGetByIdProtoList(VM* vm, CallFrame* callFrame, CodeBlock* codeBlock, StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructureList, int currentIndex, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, PropertyOffset cachedOffset)

         {
         {

-            JIT jit(globalData, codeBlock);
+            JIT jit(vm, codeBlock);
+            jit.m_bytecodeOffset = stubInfo->bytecodeIndex;

             jit.privateCompileGetByIdProtoList(stubInfo, prototypeStructureList, currentIndex, structure, prototypeStructure, ident, slot, cachedOffset, callFrame);
         }
             jit.privateCompileGetByIdProtoList(stubInfo, prototypeStructureList, currentIndex, structure, prototypeStructure, ident, slot, cachedOffset, callFrame);
         }

-        static void compileGetByIdChainList(JSGlobalData* globalData, CallFrame* callFrame, CodeBlock* codeBlock, StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructureList, int currentIndex, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset)
+        static void compileGetByIdChainList(VM* vm, CallFrame* callFrame, CodeBlock* codeBlock, StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructureList, int currentIndex, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, PropertyOffset cachedOffset)

         {
         {

-            JIT jit(globalData, codeBlock);
+            JIT jit(vm, codeBlock);
+            jit.m_bytecodeOffset = stubInfo->bytecodeIndex;

             jit.privateCompileGetByIdChainList(stubInfo, prototypeStructureList, currentIndex, structure, chain, count, ident, slot, cachedOffset, callFrame);
         }
 
             jit.privateCompileGetByIdChainList(stubInfo, prototypeStructureList, currentIndex, structure, chain, count, ident, slot, cachedOffset, callFrame);
         }
 

-        static void compileGetByIdChain(JSGlobalData* globalData, CallFrame* callFrame, CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, ReturnAddressPtr returnAddress)
+        static void compileGetByIdChain(VM* vm, CallFrame* callFrame, CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, PropertyOffset cachedOffset, ReturnAddressPtr returnAddress)

         {
         {

-            JIT jit(globalData, codeBlock);
+            JIT jit(vm, codeBlock);
+            jit.m_bytecodeOffset = stubInfo->bytecodeIndex;

             jit.privateCompileGetByIdChain(stubInfo, structure, chain, count, ident, slot, cachedOffset, returnAddress, callFrame);
         }
         
             jit.privateCompileGetByIdChain(stubInfo, structure, chain, count, ident, slot, cachedOffset, returnAddress, callFrame);
         }
         

-        static void compilePutByIdTransition(JSGlobalData* globalData, CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress, bool direct)
+        static void compilePutByIdTransition(VM* vm, CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, PropertyOffset cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress, bool direct)

         {
         {

-            JIT jit(globalData, codeBlock);
+            JIT jit(vm, codeBlock);
+            jit.m_bytecodeOffset = stubInfo->bytecodeIndex;

             jit.privateCompilePutByIdTransition(stubInfo, oldStructure, newStructure, cachedOffset, chain, returnAddress, direct);
         }
             jit.privateCompilePutByIdTransition(stubInfo, oldStructure, newStructure, cachedOffset, chain, returnAddress, direct);
         }

+        
+        static void compileGetByVal(VM* vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode)
+        {
+            JIT jit(vm, codeBlock);
+            jit.m_bytecodeOffset = byValInfo->bytecodeIndex;
+            jit.privateCompileGetByVal(byValInfo, returnAddress, arrayMode);
+        }
+
+        static void compilePutByVal(VM* vm, CodeBlock* codeBlock, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode)
+        {
+            JIT jit(vm, codeBlock);
+            jit.m_bytecodeOffset = byValInfo->bytecodeIndex;
+            jit.privateCompilePutByVal(byValInfo, returnAddress, arrayMode);
+        }

 
 

-        static void compileCTIMachineTrampolines(JSGlobalData* globalData, RefPtr<ExecutablePool>* executablePool, TrampolineStructure *trampolines)
+        static CodeRef compileCTINativeCall(VM* vm, NativeFunction func)

         {
         {

-            if (!globalData->canUseJIT())
-                return;
-            JIT jit(globalData);
-            jit.privateCompileCTIMachineTrampolines(executablePool, globalData, trampolines);
+            if (!vm->canUseJIT()) {
+#if ENABLE(LLINT)
+                return CodeRef::createLLIntCodeRef(llint_native_call_trampoline);
+#else
+                return CodeRef();
+#endif
+            }
+            JIT jit(vm, 0);
+            return jit.privateCompileCTINativeCall(vm, func);

         }
 
         }
 

-        static void patchGetByIdSelf(CodeBlock* codeblock, StructureStubInfo*, Structure*, size_t cachedOffset, ReturnAddressPtr returnAddress);
-        static void patchPutByIdReplace(CodeBlock* codeblock, StructureStubInfo*, Structure*, size_t cachedOffset, ReturnAddressPtr returnAddress, bool direct);
-        static void patchMethodCallProto(CodeBlock* codeblock, MethodCallLinkInfo&, JSFunction*, Structure*, JSObject*, ReturnAddressPtr);
+        static void resetPatchGetById(RepatchBuffer&, StructureStubInfo*);
+        static void resetPatchPutById(RepatchBuffer&, StructureStubInfo*);
+        static void patchGetByIdSelf(CodeBlock*, StructureStubInfo*, Structure*, PropertyOffset cachedOffset, ReturnAddressPtr);
+        static void patchPutByIdReplace(CodeBlock*, StructureStubInfo*, Structure*, PropertyOffset cachedOffset, ReturnAddressPtr, bool direct);

 
 

-        static void compilePatchGetArrayLength(JSGlobalData* globalData, CodeBlock* codeBlock, ReturnAddressPtr returnAddress)
+        static void compilePatchGetArrayLength(VM* vm, CodeBlock* codeBlock, ReturnAddressPtr returnAddress)

         {
         {

-            JIT jit(globalData, codeBlock);
+            JIT jit(vm, codeBlock);
+#if ENABLE(DFG_JIT)
+            // Force profiling to be enabled during stub generation.
+            jit.m_canBeOptimized = true;
+            jit.m_canBeOptimizedOrInlined = true;
+            jit.m_shouldEmitProfiling = true;
+#endif // ENABLE(DFG_JIT)

             return jit.privateCompilePatchGetArrayLength(returnAddress);
         }
 
             return jit.privateCompilePatchGetArrayLength(returnAddress);
         }
 

-        static void linkCall(JSFunction* callee, CodeBlock* callerCodeBlock, CodeBlock* calleeCodeBlock, JITCode&, CallLinkInfo*, int callerArgCount, JSGlobalData*);
-        static void unlinkCall(CallLinkInfo*);
+        static void linkFor(JSFunction* callee, CodeBlock* callerCodeBlock, CodeBlock* calleeCodeBlock, CodePtr, CallLinkInfo*, VM*, CodeSpecializationKind);
+        static void linkSlowCall(CodeBlock* callerCodeBlock, CallLinkInfo*);

 
     private:
 
     private:

-        struct JSRInfo {
-            DataLabelPtr storeLocation;
-            Label target;
-
-            JSRInfo(DataLabelPtr storeLocation, Label targetLocation)
-                : storeLocation(storeLocation)
-                , target(targetLocation)
-            {
-            }
-        };
-
-        JIT(JSGlobalData*, CodeBlock* = 0);
+        JIT(VM*, CodeBlock* = 0);

 
         void privateCompileMainPass();
         void privateCompileLinkPass();
         void privateCompileSlowCases();
 
         void privateCompileMainPass();
         void privateCompileLinkPass();
         void privateCompileSlowCases();

-        JITCode privateCompile();
-        void privateCompileGetByIdProto(StructureStubInfo*, Structure*, Structure* prototypeStructure, const Identifier&, const PropertySlot&, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame);
-        void privateCompileGetByIdSelfList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, const Identifier&, const PropertySlot&, size_t cachedOffset);
-        void privateCompileGetByIdProtoList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, Structure* prototypeStructure, const Identifier&, const PropertySlot&, size_t cachedOffset, CallFrame* callFrame);
-        void privateCompileGetByIdChainList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, StructureChain* chain, size_t count, const Identifier&, const PropertySlot&, size_t cachedOffset, CallFrame* callFrame);
-        void privateCompileGetByIdChain(StructureStubInfo*, Structure*, StructureChain*, size_t count, const Identifier&, const PropertySlot&, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame);
-        void privateCompilePutByIdTransition(StructureStubInfo*, Structure*, Structure*, size_t cachedOffset, StructureChain*, ReturnAddressPtr returnAddress, bool direct);
-
-        void privateCompileCTIMachineTrampolines(RefPtr<ExecutablePool>* executablePool, JSGlobalData* data, TrampolineStructure *trampolines);
+        JITCode privateCompile(CodePtr* functionEntryArityCheck, JITCompilationEffort);
+        
+        void privateCompileClosureCall(CallLinkInfo*, CodeBlock* calleeCodeBlock, Structure*, ExecutableBase*, MacroAssemblerCodePtr);
+        
+        void privateCompileGetByIdProto(StructureStubInfo*, Structure*, Structure* prototypeStructure, const Identifier&, const PropertySlot&, PropertyOffset cachedOffset, ReturnAddressPtr, CallFrame*);
+        void privateCompileGetByIdSelfList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, const Identifier&, const PropertySlot&, PropertyOffset cachedOffset);
+        void privateCompileGetByIdProtoList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, Structure* prototypeStructure, const Identifier&, const PropertySlot&, PropertyOffset cachedOffset, CallFrame*);
+        void privateCompileGetByIdChainList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, StructureChain*, size_t count, const Identifier&, const PropertySlot&, PropertyOffset cachedOffset, CallFrame*);
+        void privateCompileGetByIdChain(StructureStubInfo*, Structure*, StructureChain*, size_t count, const Identifier&, const PropertySlot&, PropertyOffset cachedOffset, ReturnAddressPtr, CallFrame*);
+        void privateCompilePutByIdTransition(StructureStubInfo*, Structure*, Structure*, PropertyOffset cachedOffset, StructureChain*, ReturnAddressPtr, bool direct);
+        
+        void privateCompileGetByVal(ByValInfo*, ReturnAddressPtr, JITArrayMode);
+        void privateCompilePutByVal(ByValInfo*, ReturnAddressPtr, JITArrayMode);
+
+        Label privateCompileCTINativeCall(VM*, bool isConstruct = false);
+        CodeRef privateCompileCTINativeCall(VM*, NativeFunction);

         void privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress);
 
         void privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress);
 

+        static bool isDirectPutById(StructureStubInfo*);
+

         void addSlowCase(Jump);
         void addSlowCase(JumpList);
         void addSlowCase(Jump);
         void addSlowCase(JumpList);

+        void addSlowCase();

         void addJump(Jump, int);
         void emitJumpSlowToHot(Jump, int);
 
         void addJump(Jump, int);
         void emitJumpSlowToHot(Jump, int);
 

-        void compileOpCall(OpcodeID, Instruction* instruction, unsigned callLinkInfoIndex);
-        void compileOpCallVarargs(Instruction* instruction);
-        void compileOpCallInitializeCallFrame();
-        void compileOpCallSetupArgs(Instruction*);
-        void compileOpCallVarargsSetupArgs(Instruction*);
-        void compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex, OpcodeID opcodeID);
-        void compileOpCallVarargsSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter);
-        void compileOpConstructSetupArgs(Instruction*);
+        void compileOpCall(OpcodeID, Instruction*, unsigned callLinkInfoIndex);
+        void compileOpCallSlowCase(OpcodeID, Instruction*, Vector<SlowCaseEntry>::iterator&, unsigned callLinkInfoIndex);
+        void compileLoadVarargs(Instruction*);
+        void compileCallEval();
+        void compileCallEvalSlowCase(Vector<SlowCaseEntry>::iterator&);

 
         enum CompileOpStrictEqType { OpStrictEq, OpNStrictEq };
         void compileOpStrictEq(Instruction* instruction, CompileOpStrictEqType type);
         bool isOperandConstantImmediateDouble(unsigned src);
         
 
         enum CompileOpStrictEqType { OpStrictEq, OpNStrictEq };
         void compileOpStrictEq(Instruction* instruction, CompileOpStrictEqType type);
         bool isOperandConstantImmediateDouble(unsigned src);
         

-        void emitLoadDouble(unsigned index, FPRegisterID value);
-        void emitLoadInt32ToDouble(unsigned index, FPRegisterID value);
-
-        void testPrototype(Structure*, JumpList& failureCases);
+        void emitLoadDouble(int index, FPRegisterID value);
+        void emitLoadInt32ToDouble(int index, FPRegisterID value);
+        Jump emitJumpIfNotObject(RegisterID structureReg);
+
+        Jump addStructureTransitionCheck(JSCell*, Structure*, StructureStubInfo*, RegisterID scratch);
+        void addStructureTransitionCheck(JSCell*, Structure*, StructureStubInfo*, JumpList& failureCases, RegisterID scratch);
+        void testPrototype(JSValue, JumpList& failureCases, StructureStubInfo*);
+
+        enum WriteBarrierMode { UnconditionalWriteBarrier, ShouldFilterImmediates };
+        // value register in write barrier is used before any scratch registers
+        // so may safely be the same as either of the scratch registers.
+        void emitWriteBarrier(RegisterID owner, RegisterID valueTag, RegisterID scratch, RegisterID scratch2, WriteBarrierMode, WriteBarrierUseKind);
+        void emitWriteBarrier(JSCell* owner, RegisterID value, RegisterID scratch, WriteBarrierMode, WriteBarrierUseKind);
+
+        template<typename StructureType> // StructureType can be RegisterID or ImmPtr.
+        void emitAllocateJSObject(RegisterID allocator, StructureType, RegisterID result, RegisterID scratch);
+        
+#if ENABLE(VALUE_PROFILER)
+        // This assumes that the value to profile is in regT0 and that regT3 is available for
+        // scratch.
+        void emitValueProfilingSite(ValueProfile*);
+        void emitValueProfilingSite(unsigned bytecodeOffset);
+        void emitValueProfilingSite();
+#else
+        void emitValueProfilingSite(unsigned) { }
+        void emitValueProfilingSite() { }
+#endif
+        void emitArrayProfilingSite(RegisterID structureAndIndexingType, RegisterID scratch, ArrayProfile*);
+        void emitArrayProfilingSiteForBytecodeIndex(RegisterID structureAndIndexingType, RegisterID scratch, unsigned bytecodeIndex);
+        void emitArrayProfileStoreToHoleSpecialCase(ArrayProfile*);
+        void emitArrayProfileOutOfBoundsSpecialCase(ArrayProfile*);
+        
+        JITArrayMode chooseArrayMode(ArrayProfile*);
+        
+        // Property is in regT1, base is in regT0. regT2 contains indexing type.
+        // Property is int-checked and zero extended. Base is cell checked.
+        // Structure is already profiled. Returns the slow cases. Fall-through
+        // case contains result in regT0, and it is not yet profiled.
+        JumpList emitInt32GetByVal(Instruction* instruction, PatchableJump& badType) { return emitContiguousGetByVal(instruction, badType, Int32Shape); }
+        JumpList emitDoubleGetByVal(Instruction*, PatchableJump& badType);
+        JumpList emitContiguousGetByVal(Instruction*, PatchableJump& badType, IndexingType expectedShape = ContiguousShape);
+        JumpList emitArrayStorageGetByVal(Instruction*, PatchableJump& badType);
+        JumpList emitIntTypedArrayGetByVal(Instruction*, PatchableJump& badType, const TypedArrayDescriptor&, size_t elementSize, TypedArraySignedness);
+        JumpList emitFloatTypedArrayGetByVal(Instruction*, PatchableJump& badType, const TypedArrayDescriptor&, size_t elementSize);
+        
+        // Property is in regT0, base is in regT0. regT2 contains indecing type.
+        // The value to store is not yet loaded. Property is int-checked and
+        // zero-extended. Base is cell checked. Structure is already profiled.
+        // returns the slow cases.
+        JumpList emitInt32PutByVal(Instruction* currentInstruction, PatchableJump& badType)
+        {
+            return emitGenericContiguousPutByVal(currentInstruction, badType, Int32Shape);
+        }
+        JumpList emitDoublePutByVal(Instruction* currentInstruction, PatchableJump& badType)
+        {
+            return emitGenericContiguousPutByVal(currentInstruction, badType, DoubleShape);
+        }
+        JumpList emitContiguousPutByVal(Instruction* currentInstruction, PatchableJump& badType)
+        {
+            return emitGenericContiguousPutByVal(currentInstruction, badType);
+        }
+        JumpList emitGenericContiguousPutByVal(Instruction*, PatchableJump& badType, IndexingType indexingShape = ContiguousShape);
+        JumpList emitArrayStoragePutByVal(Instruction*, PatchableJump& badType);
+        JumpList emitIntTypedArrayPutByVal(Instruction*, PatchableJump& badType, const TypedArrayDescriptor&, size_t elementSize, TypedArraySignedness, TypedArrayRounding);
+        JumpList emitFloatTypedArrayPutByVal(Instruction*, PatchableJump& badType, const TypedArrayDescriptor&, size_t elementSize);
+        
+        enum FinalObjectMode { MayBeFinal, KnownNotFinal };

 
 #if USE(JSVALUE32_64)
         bool getOperandConstantImmediateInt(unsigned op1, unsigned op2, unsigned& op, int32_t& constant);
 
 
 #if USE(JSVALUE32_64)
         bool getOperandConstantImmediateInt(unsigned op1, unsigned op2, unsigned& op, int32_t& constant);
 

-        void emitLoadTag(unsigned index, RegisterID tag);
-        void emitLoadPayload(unsigned index, RegisterID payload);
+        void emitLoadTag(int index, RegisterID tag);
+        void emitLoadPayload(int index, RegisterID payload);

 
         void emitLoad(const JSValue& v, RegisterID tag, RegisterID payload);
 
         void emitLoad(const JSValue& v, RegisterID tag, RegisterID payload);

-        void emitLoad(unsigned index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
-        void emitLoad2(unsigned index1, RegisterID tag1, RegisterID payload1, unsigned index2, RegisterID tag2, RegisterID payload2);
-
-        void emitStore(unsigned index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
-        void emitStore(unsigned index, const JSValue constant, RegisterID base = callFrameRegister);
-        void emitStoreInt32(unsigned index, RegisterID payload, bool indexIsInt32 = false);
-        void emitStoreInt32(unsigned index, Imm32 payload, bool indexIsInt32 = false);
-        void emitStoreCell(unsigned index, RegisterID payload, bool indexIsCell = false);
-        void emitStoreBool(unsigned index, RegisterID tag, bool indexIsBool = false);
-        void emitStoreDouble(unsigned index, FPRegisterID value);
-
-        bool isLabeled(unsigned bytecodeIndex);
-        void map(unsigned bytecodeIndex, unsigned virtualRegisterIndex, RegisterID tag, RegisterID payload);
+        void emitLoad(int index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
+        void emitLoad2(int index1, RegisterID tag1, RegisterID payload1, int index2, RegisterID tag2, RegisterID payload2);
+
+        void emitStore(int index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
+        void emitStore(int index, const JSValue constant, RegisterID base = callFrameRegister);
+        void emitStoreInt32(int index, RegisterID payload, bool indexIsInt32 = false);
+        void emitStoreInt32(int index, TrustedImm32 payload, bool indexIsInt32 = false);
+        void emitStoreAndMapInt32(int index, RegisterID tag, RegisterID payload, bool indexIsInt32, size_t opcodeLength);
+        void emitStoreCell(int index, RegisterID payload, bool indexIsCell = false);
+        void emitStoreBool(int index, RegisterID payload, bool indexIsBool = false);
+        void emitStoreDouble(int index, FPRegisterID value);
+
+        bool isLabeled(unsigned bytecodeOffset);
+        void map(unsigned bytecodeOffset, int virtualRegisterIndex, RegisterID tag, RegisterID payload);

         void unmap(RegisterID);
         void unmap();
         void unmap(RegisterID);
         void unmap();

-        bool isMapped(unsigned virtualRegisterIndex);
-        bool getMappedPayload(unsigned virtualRegisterIndex, RegisterID& payload);
-        bool getMappedTag(unsigned virtualRegisterIndex, RegisterID& tag);
-
-        void emitJumpSlowCaseIfNotJSCell(unsigned virtualRegisterIndex);
-        void emitJumpSlowCaseIfNotJSCell(unsigned virtualRegisterIndex, RegisterID tag);
-        void linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator&, unsigned virtualRegisterIndex);
+        bool isMapped(int virtualRegisterIndex);
+        bool getMappedPayload(int virtualRegisterIndex, RegisterID& payload);
+        bool getMappedTag(int virtualRegisterIndex, RegisterID& tag);
+        
+        void emitJumpSlowCaseIfNotJSCell(int virtualRegisterIndex);
+        void emitJumpSlowCaseIfNotJSCell(int virtualRegisterIndex, RegisterID tag);

 
 

-#if ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
-        void compileGetByIdHotPath();
-        void compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, bool isMethodCheck = false);
-#endif
-        void compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, Structure* structure, size_t cachedOffset);
-        void compileGetDirectOffset(JSObject* base, RegisterID temp, RegisterID resultTag, RegisterID resultPayload, size_t cachedOffset);
-        void compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, RegisterID structure, RegisterID offset);
-        void compilePutDirectOffset(RegisterID base, RegisterID valueTag, RegisterID valuePayload, Structure* structure, size_t cachedOffset);
+        void compileGetByIdHotPath(Identifier*);
+        void compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier*, Vector<SlowCaseEntry>::iterator&);
+        void compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, PropertyOffset cachedOffset);
+        void compileGetDirectOffset(JSObject* base, RegisterID resultTag, RegisterID resultPayload, PropertyOffset cachedOffset);
+        void compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, RegisterID offset, FinalObjectMode = MayBeFinal);
+        void compilePutDirectOffset(RegisterID base, RegisterID valueTag, RegisterID valuePayload, PropertyOffset cachedOffset);

 
         // Arithmetic opcode helpers
         void emitAdd32Constant(unsigned dst, unsigned op, int32_t constant, ResultType opType);
         void emitSub32Constant(unsigned dst, unsigned op, int32_t constant, ResultType opType);
         void emitBinaryDoubleOp(OpcodeID, unsigned dst, unsigned op1, unsigned op2, OperandTypes, JumpList& notInt32Op1, JumpList& notInt32Op2, bool op1IsInRegisters = true, bool op2IsInRegisters = true);
 
 
         // Arithmetic opcode helpers
         void emitAdd32Constant(unsigned dst, unsigned op, int32_t constant, ResultType opType);
         void emitSub32Constant(unsigned dst, unsigned op, int32_t constant, ResultType opType);
         void emitBinaryDoubleOp(OpcodeID, unsigned dst, unsigned op1, unsigned op2, OperandTypes, JumpList& notInt32Op1, JumpList& notInt32Op2, bool op1IsInRegisters = true, bool op2IsInRegisters = true);
 

-#if CPU(X86)
-        // These architecture specific value are used to enable patching - see comment on op_put_by_id.
-        static const int patchOffsetPutByIdStructure = 7;
-        static const int patchOffsetPutByIdExternalLoad = 13;
-        static const int patchLengthPutByIdExternalLoad = 3;
-        static const int patchOffsetPutByIdPropertyMapOffset1 = 22;
-        static const int patchOffsetPutByIdPropertyMapOffset2 = 28;
-        // These architecture specific value are used to enable patching - see comment on op_get_by_id.
-        static const int patchOffsetGetByIdStructure = 7;
-        static const int patchOffsetGetByIdBranchToSlowCase = 13;
-        static const int patchOffsetGetByIdExternalLoad = 13;
-        static const int patchLengthGetByIdExternalLoad = 3;
-        static const int patchOffsetGetByIdPropertyMapOffset1 = 22;
-        static const int patchOffsetGetByIdPropertyMapOffset2 = 28;
-        static const int patchOffsetGetByIdPutResult = 28;
-#if ENABLE(OPCODE_SAMPLING) && USE(JIT_STUB_ARGUMENT_VA_LIST)
-        static const int patchOffsetGetByIdSlowCaseCall = 35;
-#elif ENABLE(OPCODE_SAMPLING)
-        static const int patchOffsetGetByIdSlowCaseCall = 37;
-#elif USE(JIT_STUB_ARGUMENT_VA_LIST)
-        static const int patchOffsetGetByIdSlowCaseCall = 25;
-#else
-        static const int patchOffsetGetByIdSlowCaseCall = 27;
-#endif
-        static const int patchOffsetOpCallCompareToJump = 6;
-
-        static const int patchOffsetMethodCheckProtoObj = 11;
-        static const int patchOffsetMethodCheckProtoStruct = 18;
-        static const int patchOffsetMethodCheckPutFunction = 29;
-#elif CPU(ARM_TRADITIONAL)
-        // These architecture specific value are used to enable patching - see comment on op_put_by_id.
-        static const int patchOffsetPutByIdStructure = 4;
-        static const int patchOffsetPutByIdExternalLoad = 16;
-        static const int patchLengthPutByIdExternalLoad = 4;
-        static const int patchOffsetPutByIdPropertyMapOffset1 = 20;
-        static const int patchOffsetPutByIdPropertyMapOffset2 = 28;
-        // These architecture specific value are used to enable patching - see comment on op_get_by_id.
-        static const int patchOffsetGetByIdStructure = 4;
-        static const int patchOffsetGetByIdBranchToSlowCase = 16;
-        static const int patchOffsetGetByIdExternalLoad = 16;
-        static const int patchLengthGetByIdExternalLoad = 4;
-        static const int patchOffsetGetByIdPropertyMapOffset1 = 20;
-        static const int patchOffsetGetByIdPropertyMapOffset2 = 28;
-        static const int patchOffsetGetByIdPutResult = 36;
-#if ENABLE(OPCODE_SAMPLING)
-        #error "OPCODE_SAMPLING is not yet supported"
-#else
-        static const int patchOffsetGetByIdSlowCaseCall = 32;
-#endif
-        static const int patchOffsetOpCallCompareToJump = 12;
-
-        static const int patchOffsetMethodCheckProtoObj = 12;
-        static const int patchOffsetMethodCheckProtoStruct = 20;
-        static const int patchOffsetMethodCheckPutFunction = 32;
-
+#if CPU(ARM_TRADITIONAL)

         // sequenceOpCall
         static const int sequenceOpCallInstructionSpace = 12;
         static const int sequenceOpCallConstantSpace = 2;
         // sequenceOpCall
         static const int sequenceOpCallInstructionSpace = 12;
         static const int sequenceOpCallConstantSpace = 2;

-        // sequenceMethodCheck
-        static const int sequenceMethodCheckInstructionSpace = 40;
-        static const int sequenceMethodCheckConstantSpace = 6;

         // sequenceGetByIdHotPath
         static const int sequenceGetByIdHotPathInstructionSpace = 36;
         static const int sequenceGetByIdHotPathConstantSpace = 4;
         // sequenceGetByIdSlowCase
         // sequenceGetByIdHotPath
         static const int sequenceGetByIdHotPathInstructionSpace = 36;
         static const int sequenceGetByIdHotPathConstantSpace = 4;
         // sequenceGetByIdSlowCase

-        static const int sequenceGetByIdSlowCaseInstructionSpace = 40;
-        static const int sequenceGetByIdSlowCaseConstantSpace = 2;
+        static const int sequenceGetByIdSlowCaseInstructionSpace = 80;
+        static const int sequenceGetByIdSlowCaseConstantSpace = 4;

         // sequencePutById
         static const int sequencePutByIdInstructionSpace = 36;
         static const int sequencePutByIdConstantSpace = 4;
         // sequencePutById
         static const int sequencePutByIdInstructionSpace = 36;
         static const int sequencePutByIdConstantSpace = 4;

-#elif CPU(ARM_THUMB2)
-        // These architecture specific value are used to enable patching - see comment on op_put_by_id.
-        static const int patchOffsetPutByIdStructure = 10;
-        static const int patchOffsetPutByIdExternalLoad = 26;
-        static const int patchLengthPutByIdExternalLoad = 12;
-        static const int patchOffsetPutByIdPropertyMapOffset1 = 46;
-        static const int patchOffsetPutByIdPropertyMapOffset2 = 58;
-        // These architecture specific value are used to enable patching - see comment on op_get_by_id.
-        static const int patchOffsetGetByIdStructure = 10;
-        static const int patchOffsetGetByIdBranchToSlowCase = 26;
-        static const int patchOffsetGetByIdExternalLoad = 26;
-        static const int patchLengthGetByIdExternalLoad = 12;
-        static const int patchOffsetGetByIdPropertyMapOffset1 = 46;
-        static const int patchOffsetGetByIdPropertyMapOffset2 = 58;
-        static const int patchOffsetGetByIdPutResult = 62;
-#if ENABLE(OPCODE_SAMPLING)
-        #error "OPCODE_SAMPLING is not yet supported"
-#else
-        static const int patchOffsetGetByIdSlowCaseCall = 30;
-#endif
-        static const int patchOffsetOpCallCompareToJump = 16;
-
-        static const int patchOffsetMethodCheckProtoObj = 24;
-        static const int patchOffsetMethodCheckProtoStruct = 34;
-        static const int patchOffsetMethodCheckPutFunction = 58;
-
+#elif CPU(SH4)

         // sequenceOpCall
         static const int sequenceOpCallInstructionSpace = 12;
         static const int sequenceOpCallConstantSpace = 2;
         // sequenceOpCall
         static const int sequenceOpCallInstructionSpace = 12;
         static const int sequenceOpCallConstantSpace = 2;

-        // sequenceMethodCheck
-        static const int sequenceMethodCheckInstructionSpace = 40;
-        static const int sequenceMethodCheckConstantSpace = 6;

         // sequenceGetByIdHotPath
         static const int sequenceGetByIdHotPathInstructionSpace = 36;
         // sequenceGetByIdHotPath
         static const int sequenceGetByIdHotPathInstructionSpace = 36;

-        static const int sequenceGetByIdHotPathConstantSpace = 4;
+        static const int sequenceGetByIdHotPathConstantSpace = 5;

         // sequenceGetByIdSlowCase
         // sequenceGetByIdSlowCase

-        static const int sequenceGetByIdSlowCaseInstructionSpace = 40;
-        static const int sequenceGetByIdSlowCaseConstantSpace = 2;
+        static const int sequenceGetByIdSlowCaseInstructionSpace = 38;
+        static const int sequenceGetByIdSlowCaseConstantSpace = 4;

         // sequencePutById
         static const int sequencePutByIdInstructionSpace = 36;
         // sequencePutById
         static const int sequencePutByIdInstructionSpace = 36;

-        static const int sequencePutByIdConstantSpace = 4;
-#else
-#error "JSVALUE32_64 not supported on this platform."
+        static const int sequencePutByIdConstantSpace = 5;

 #endif
 
 #else // USE(JSVALUE32_64)
 #endif
 
 #else // USE(JSVALUE32_64)

+        /* This function is deprecated. */
+        void emitGetJITStubArg(unsigned argumentNumber, RegisterID dst);
+

         void emitGetVirtualRegister(int src, RegisterID dst);
         void emitGetVirtualRegisters(int src1, RegisterID dst1, int src2, RegisterID dst2);
         void emitPutVirtualRegister(unsigned dst, RegisterID from = regT0);
         void emitGetVirtualRegister(int src, RegisterID dst);
         void emitGetVirtualRegisters(int src1, RegisterID dst1, int src2, RegisterID dst2);
         void emitPutVirtualRegister(unsigned dst, RegisterID from = regT0);

+        void emitStoreCell(unsigned dst, RegisterID payload, bool /* only used in JSValue32_64 */ = false)
+        {
+            emitPutVirtualRegister(dst, payload);
+        }

 
         int32_t getConstantOperandImmediateInt(unsigned src);
 
 
         int32_t getConstantOperandImmediateInt(unsigned src);
 

-        void emitGetVariableObjectRegister(RegisterID variableObject, int index, RegisterID dst);
-        void emitPutVariableObjectRegister(RegisterID src, RegisterID variableObject, int index);
-        

         void killLastResultRegister();
 
         Jump emitJumpIfJSCell(RegisterID);
         Jump emitJumpIfBothJSCells(RegisterID, RegisterID, RegisterID);
         void emitJumpSlowCaseIfJSCell(RegisterID);
         void killLastResultRegister();
 
         Jump emitJumpIfJSCell(RegisterID);
         Jump emitJumpIfBothJSCells(RegisterID, RegisterID, RegisterID);
         void emitJumpSlowCaseIfJSCell(RegisterID);

-        Jump emitJumpIfNotJSCell(RegisterID);

         void emitJumpSlowCaseIfNotJSCell(RegisterID);
         void emitJumpSlowCaseIfNotJSCell(RegisterID, int VReg);
         void emitJumpSlowCaseIfNotJSCell(RegisterID);
         void emitJumpSlowCaseIfNotJSCell(RegisterID, int VReg);

-#if USE(JSVALUE64)
-#else
-        JIT::Jump emitJumpIfImmediateNumber(RegisterID reg)
-        {
-            return emitJumpIfImmediateInteger(reg);
-        }
-        
-        JIT::Jump emitJumpIfNotImmediateNumber(RegisterID reg)
-        {
-            return emitJumpIfNotImmediateInteger(reg);
-        }
-#endif
-        JIT::Jump emitJumpIfImmediateInteger(RegisterID);
-        JIT::Jump emitJumpIfNotImmediateInteger(RegisterID);
-        JIT::Jump emitJumpIfNotImmediateIntegers(RegisterID, RegisterID, RegisterID);
+        Jump emitJumpIfImmediateInteger(RegisterID);
+        Jump emitJumpIfNotImmediateInteger(RegisterID);
+        Jump emitJumpIfNotImmediateIntegers(RegisterID, RegisterID, RegisterID);

         void emitJumpSlowCaseIfNotImmediateInteger(RegisterID);
         void emitJumpSlowCaseIfNotImmediateNumber(RegisterID);
         void emitJumpSlowCaseIfNotImmediateIntegers(RegisterID, RegisterID, RegisterID);
 
         void emitJumpSlowCaseIfNotImmediateInteger(RegisterID);
         void emitJumpSlowCaseIfNotImmediateNumber(RegisterID);
         void emitJumpSlowCaseIfNotImmediateIntegers(RegisterID, RegisterID, RegisterID);
 

-#if !USE(JSVALUE64)
-        void emitFastArithDeTagImmediate(RegisterID);
-        Jump emitFastArithDeTagImmediateJumpIfZero(RegisterID);
-#endif

         void emitFastArithReTagImmediate(RegisterID src, RegisterID dest);
         void emitFastArithReTagImmediate(RegisterID src, RegisterID dest);

-        void emitFastArithIntToImmNoCheck(RegisterID src, RegisterID dest);

 
         void emitTagAsBoolImmediate(RegisterID reg);
         void compileBinaryArithOp(OpcodeID, unsigned dst, unsigned src1, unsigned src2, OperandTypes opi);
 
         void emitTagAsBoolImmediate(RegisterID reg);
         void compileBinaryArithOp(OpcodeID, unsigned dst, unsigned src1, unsigned src2, OperandTypes opi);

-#if USE(JSVALUE64)

         void compileBinaryArithOpSlowCase(OpcodeID, Vector<SlowCaseEntry>::iterator&, unsigned dst, unsigned src1, unsigned src2, OperandTypes, bool op1HasImmediateIntFastCase, bool op2HasImmediateIntFastCase);
         void compileBinaryArithOpSlowCase(OpcodeID, Vector<SlowCaseEntry>::iterator&, unsigned dst, unsigned src1, unsigned src2, OperandTypes, bool op1HasImmediateIntFastCase, bool op2HasImmediateIntFastCase);

-#else
-        void compileBinaryArithOpSlowCase(OpcodeID, Vector<SlowCaseEntry>::iterator&, unsigned dst, unsigned src1, unsigned src2, OperandTypes);
-#endif
-
-#if ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
-        void compileGetByIdHotPath(int resultVReg, int baseVReg, Identifier* ident, unsigned propertyAccessInstructionIndex);
-        void compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, bool isMethodCheck = false);
-#endif
-        void compileGetDirectOffset(RegisterID base, RegisterID result, Structure* structure, size_t cachedOffset);
-        void compileGetDirectOffset(JSObject* base, RegisterID temp, RegisterID result, size_t cachedOffset);
-        void compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID structure, RegisterID offset, RegisterID scratch);
-        void compilePutDirectOffset(RegisterID base, RegisterID value, Structure* structure, size_t cachedOffset);
-
-#if CPU(X86_64)
-        // These architecture specific value are used to enable patching - see comment on op_put_by_id.
-        static const int patchOffsetPutByIdStructure = 10;
-        static const int patchOffsetPutByIdExternalLoad = 20;
-        static const int patchLengthPutByIdExternalLoad = 4;
-        static const int patchOffsetPutByIdPropertyMapOffset = 31;
-        // These architecture specific value are used to enable patching - see comment on op_get_by_id.
-        static const int patchOffsetGetByIdStructure = 10;
-        static const int patchOffsetGetByIdBranchToSlowCase = 20;
-        static const int patchOffsetGetByIdExternalLoad = 20;
-        static const int patchLengthGetByIdExternalLoad = 4;
-        static const int patchOffsetGetByIdPropertyMapOffset = 31;
-        static const int patchOffsetGetByIdPutResult = 31;
-#if ENABLE(OPCODE_SAMPLING)
-        static const int patchOffsetGetByIdSlowCaseCall = 64;
-#else
-        static const int patchOffsetGetByIdSlowCaseCall = 41;
-#endif
-        static const int patchOffsetOpCallCompareToJump = 9;
-
-        static const int patchOffsetMethodCheckProtoObj = 20;
-        static const int patchOffsetMethodCheckProtoStruct = 30;
-        static const int patchOffsetMethodCheckPutFunction = 50;
-#elif CPU(X86)
-        // These architecture specific value are used to enable patching - see comment on op_put_by_id.
-        static const int patchOffsetPutByIdStructure = 7;
-        static const int patchOffsetPutByIdExternalLoad = 13;
-        static const int patchLengthPutByIdExternalLoad = 3;
-        static const int patchOffsetPutByIdPropertyMapOffset = 22;
-        // These architecture specific value are used to enable patching - see comment on op_get_by_id.
-        static const int patchOffsetGetByIdStructure = 7;
-        static const int patchOffsetGetByIdBranchToSlowCase = 13;
-        static const int patchOffsetGetByIdExternalLoad = 13;
-        static const int patchLengthGetByIdExternalLoad = 3;
-        static const int patchOffsetGetByIdPropertyMapOffset = 22;
-        static const int patchOffsetGetByIdPutResult = 22;
-#if ENABLE(OPCODE_SAMPLING) && USE(JIT_STUB_ARGUMENT_VA_LIST)
-        static const int patchOffsetGetByIdSlowCaseCall = 31;
-#elif ENABLE(OPCODE_SAMPLING)
-        static const int patchOffsetGetByIdSlowCaseCall = 33;
-#elif USE(JIT_STUB_ARGUMENT_VA_LIST)
-        static const int patchOffsetGetByIdSlowCaseCall = 21;
-#else
-        static const int patchOffsetGetByIdSlowCaseCall = 23;
-#endif
-        static const int patchOffsetOpCallCompareToJump = 6;
-
-        static const int patchOffsetMethodCheckProtoObj = 11;
-        static const int patchOffsetMethodCheckProtoStruct = 18;
-        static const int patchOffsetMethodCheckPutFunction = 29;
-#elif CPU(ARM_THUMB2)
-        // These architecture specific value are used to enable patching - see comment on op_put_by_id.
-        static const int patchOffsetPutByIdStructure = 10;
-        static const int patchOffsetPutByIdExternalLoad = 26;
-        static const int patchLengthPutByIdExternalLoad = 12;
-        static const int patchOffsetPutByIdPropertyMapOffset = 46;
-        // These architecture specific value are used to enable patching - see comment on op_get_by_id.
-        static const int patchOffsetGetByIdStructure = 10;
-        static const int patchOffsetGetByIdBranchToSlowCase = 26;
-        static const int patchOffsetGetByIdExternalLoad = 26;
-        static const int patchLengthGetByIdExternalLoad = 12;
-        static const int patchOffsetGetByIdPropertyMapOffset = 46;
-        static const int patchOffsetGetByIdPutResult = 50;
-#if ENABLE(OPCODE_SAMPLING)
-        static const int patchOffsetGetByIdSlowCaseCall = 0; // FIMXE
-#else
-        static const int patchOffsetGetByIdSlowCaseCall = 28;
-#endif
-        static const int patchOffsetOpCallCompareToJump = 16;
-
-        static const int patchOffsetMethodCheckProtoObj = 24;
-        static const int patchOffsetMethodCheckProtoStruct = 34;
-        static const int patchOffsetMethodCheckPutFunction = 58;
-#elif CPU(ARM_TRADITIONAL)
-        // These architecture specific value are used to enable patching - see comment on op_put_by_id.
-        static const int patchOffsetPutByIdStructure = 4;
-        static const int patchOffsetPutByIdExternalLoad = 16;
-        static const int patchLengthPutByIdExternalLoad = 4;
-        static const int patchOffsetPutByIdPropertyMapOffset = 20;
-        // These architecture specific value are used to enable patching - see comment on op_get_by_id.
-        static const int patchOffsetGetByIdStructure = 4;
-        static const int patchOffsetGetByIdBranchToSlowCase = 16;
-        static const int patchOffsetGetByIdExternalLoad = 16;
-        static const int patchLengthGetByIdExternalLoad = 4;
-        static const int patchOffsetGetByIdPropertyMapOffset = 20;
-        static const int patchOffsetGetByIdPutResult = 28;
-#if ENABLE(OPCODE_SAMPLING)
-        #error "OPCODE_SAMPLING is not yet supported"
-#else
-        static const int patchOffsetGetByIdSlowCaseCall = 28;
-#endif
-        static const int patchOffsetOpCallCompareToJump = 12;

 
 

-        static const int patchOffsetMethodCheckProtoObj = 12;
-        static const int patchOffsetMethodCheckProtoStruct = 20;
-        static const int patchOffsetMethodCheckPutFunction = 32;
+        void compileGetByIdHotPath(int baseVReg, Identifier*);
+        void compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier*, Vector<SlowCaseEntry>::iterator&);
+        void compileGetDirectOffset(RegisterID base, RegisterID result, PropertyOffset cachedOffset);
+        void compileGetDirectOffset(JSObject* base, RegisterID result, PropertyOffset cachedOffset);
+        void compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID offset, RegisterID scratch, FinalObjectMode = MayBeFinal);
+        void compilePutDirectOffset(RegisterID base, RegisterID value, PropertyOffset cachedOffset);

 
 

-        // sequenceOpCall
-        static const int sequenceOpCallInstructionSpace = 12;
-        static const int sequenceOpCallConstantSpace = 2;
-        // sequenceMethodCheck
-        static const int sequenceMethodCheckInstructionSpace = 40;
-        static const int sequenceMethodCheckConstantSpace = 6;
-        // sequenceGetByIdHotPath
-        static const int sequenceGetByIdHotPathInstructionSpace = 28;
-        static const int sequenceGetByIdHotPathConstantSpace = 3;
-        // sequenceGetByIdSlowCase
-        static const int sequenceGetByIdSlowCaseInstructionSpace = 32;
-        static const int sequenceGetByIdSlowCaseConstantSpace = 2;
-        // sequencePutById
-        static const int sequencePutByIdInstructionSpace = 28;
-        static const int sequencePutByIdConstantSpace = 3;
-#elif CPU(MIPS)
-#if WTF_MIPS_ISA(1)
-        static const int patchOffsetPutByIdStructure = 16;
-        static const int patchOffsetPutByIdExternalLoad = 48;
-        static const int patchLengthPutByIdExternalLoad = 20;
-        static const int patchOffsetPutByIdPropertyMapOffset = 68;
-        static const int patchOffsetGetByIdStructure = 16;
-        static const int patchOffsetGetByIdBranchToSlowCase = 48;
-        static const int patchOffsetGetByIdExternalLoad = 48;
-        static const int patchLengthGetByIdExternalLoad = 20;
-        static const int patchOffsetGetByIdPropertyMapOffset = 68;
-        static const int patchOffsetGetByIdPutResult = 88;
-#if ENABLE(OPCODE_SAMPLING)
-        #error "OPCODE_SAMPLING is not yet supported"
-#else
-        static const int patchOffsetGetByIdSlowCaseCall = 40;
-#endif
-        static const int patchOffsetOpCallCompareToJump = 32;
-        static const int patchOffsetMethodCheckProtoObj = 32;
-        static const int patchOffsetMethodCheckProtoStruct = 56;
-        static const int patchOffsetMethodCheckPutFunction = 88;
-#else // WTF_MIPS_ISA(1)
-        static const int patchOffsetPutByIdStructure = 12;
-        static const int patchOffsetPutByIdExternalLoad = 44;
-        static const int patchLengthPutByIdExternalLoad = 16;
-        static const int patchOffsetPutByIdPropertyMapOffset = 60;
-        static const int patchOffsetGetByIdStructure = 12;
-        static const int patchOffsetGetByIdBranchToSlowCase = 44;
-        static const int patchOffsetGetByIdExternalLoad = 44;
-        static const int patchLengthGetByIdExternalLoad = 16;
-        static const int patchOffsetGetByIdPropertyMapOffset = 60;
-        static const int patchOffsetGetByIdPutResult = 76;
-#if ENABLE(OPCODE_SAMPLING)
-        #error "OPCODE_SAMPLING is not yet supported"
-#else
-        static const int patchOffsetGetByIdSlowCaseCall = 40;
-#endif
-        static const int patchOffsetOpCallCompareToJump = 32;
-        static const int patchOffsetMethodCheckProtoObj = 32;
-        static const int patchOffsetMethodCheckProtoStruct = 52;
-        static const int patchOffsetMethodCheckPutFunction = 84;
-#endif
-#endif

 #endif // USE(JSVALUE32_64)
 
 #endif // USE(JSVALUE32_64)
 

-#if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL
-#define BEGIN_UNINTERRUPTED_SEQUENCE(name) beginUninterruptedSequence(name ## InstructionSpace, name ## ConstantSpace)
-#define END_UNINTERRUPTED_SEQUENCE(name) endUninterruptedSequence(name ## InstructionSpace, name ## ConstantSpace)
+#if (defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL)
+#define BEGIN_UNINTERRUPTED_SEQUENCE(name) do { beginUninterruptedSequence(name ## InstructionSpace, name ## ConstantSpace); } while (false)
+#define END_UNINTERRUPTED_SEQUENCE_FOR_PUT(name, dst) do { endUninterruptedSequence(name ## InstructionSpace, name ## ConstantSpace, dst); } while (false)
+#define END_UNINTERRUPTED_SEQUENCE(name) END_UNINTERRUPTED_SEQUENCE_FOR_PUT(name, 0)

 
         void beginUninterruptedSequence(int, int);
 
         void beginUninterruptedSequence(int, int);

-        void endUninterruptedSequence(int, int);
+        void endUninterruptedSequence(int, int, int);

 
 #else
 #define BEGIN_UNINTERRUPTED_SEQUENCE(name)
 #define END_UNINTERRUPTED_SEQUENCE(name)
 
 #else
 #define BEGIN_UNINTERRUPTED_SEQUENCE(name)
 #define END_UNINTERRUPTED_SEQUENCE(name)

+#define END_UNINTERRUPTED_SEQUENCE_FOR_PUT(name, dst)

 #endif
 
 #endif
 

+        void emit_compareAndJump(OpcodeID, unsigned op1, unsigned op2, unsigned target, RelationalCondition);
+        void emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, DoubleCondition, int (JIT_STUB *stub)(STUB_ARGS_DECLARATION), bool invert, Vector<SlowCaseEntry>::iterator&);
+

         void emit_op_add(Instruction*);
         void emit_op_bitand(Instruction*);
         void emit_op_add(Instruction*);
         void emit_op_bitand(Instruction*);

-        void emit_op_bitnot(Instruction*);

         void emit_op_bitor(Instruction*);
         void emit_op_bitxor(Instruction*);
         void emit_op_call(Instruction*);
         void emit_op_call_eval(Instruction*);
         void emit_op_call_varargs(Instruction*);
         void emit_op_bitor(Instruction*);
         void emit_op_bitxor(Instruction*);
         void emit_op_call(Instruction*);
         void emit_op_call_eval(Instruction*);
         void emit_op_call_varargs(Instruction*);

+        void emit_op_call_put_result(Instruction*);

         void emit_op_catch(Instruction*);
         void emit_op_construct(Instruction*);
         void emit_op_catch(Instruction*);
         void emit_op_construct(Instruction*);

-        void emit_op_construct_verify(Instruction*);
+        void emit_op_get_callee(Instruction*);
+        void emit_op_create_this(Instruction*);

         void emit_op_convert_this(Instruction*);
         void emit_op_create_arguments(Instruction*);
         void emit_op_debug(Instruction*);
         void emit_op_convert_this(Instruction*);
         void emit_op_create_arguments(Instruction*);
         void emit_op_debug(Instruction*);


@@ -696,36 +660,37 @@ namespace JSC {
         void emit_op_div(Instruction*);
         void emit_op_end(Instruction*);
         void emit_op_enter(Instruction*);
         void emit_op_div(Instruction*);
         void emit_op_end(Instruction*);
         void emit_op_enter(Instruction*);

-        void emit_op_enter_with_activation(Instruction*);
+        void emit_op_create_activation(Instruction*);

         void emit_op_eq(Instruction*);
         void emit_op_eq_null(Instruction*);
         void emit_op_get_by_id(Instruction*);
         void emit_op_eq(Instruction*);
         void emit_op_eq_null(Instruction*);
         void emit_op_get_by_id(Instruction*);

+        void emit_op_get_arguments_length(Instruction*);

         void emit_op_get_by_val(Instruction*);
         void emit_op_get_by_val(Instruction*);

+        void emit_op_get_argument_by_val(Instruction*);

         void emit_op_get_by_pname(Instruction*);
         void emit_op_get_by_pname(Instruction*);

-        void emit_op_get_global_var(Instruction*);
-        void emit_op_get_scoped_var(Instruction*);
-        void emit_op_init_arguments(Instruction*);
+        void emit_op_init_lazy_reg(Instruction*);
+        void emit_op_check_has_instance(Instruction*);

         void emit_op_instanceof(Instruction*);
         void emit_op_instanceof(Instruction*);

+        void emit_op_is_undefined(Instruction*);
+        void emit_op_is_boolean(Instruction*);
+        void emit_op_is_number(Instruction*);
+        void emit_op_is_string(Instruction*);

         void emit_op_jeq_null(Instruction*);
         void emit_op_jfalse(Instruction*);
         void emit_op_jmp(Instruction*);
         void emit_op_jeq_null(Instruction*);
         void emit_op_jfalse(Instruction*);
         void emit_op_jmp(Instruction*);

-        void emit_op_jmp_scopes(Instruction*);

         void emit_op_jneq_null(Instruction*);
         void emit_op_jneq_ptr(Instruction*);
         void emit_op_jneq_null(Instruction*);
         void emit_op_jneq_ptr(Instruction*);

-        void emit_op_jnless(Instruction*);

         void emit_op_jless(Instruction*);
         void emit_op_jless(Instruction*);

-        void emit_op_jlesseq(Instruction*, bool invert = false);
+        void emit_op_jlesseq(Instruction*);
+        void emit_op_jgreater(Instruction*);
+        void emit_op_jgreatereq(Instruction*);
+        void emit_op_jnless(Instruction*);

         void emit_op_jnlesseq(Instruction*);
         void emit_op_jnlesseq(Instruction*);

-        void emit_op_jsr(Instruction*);
+        void emit_op_jngreater(Instruction*);
+        void emit_op_jngreatereq(Instruction*);

         void emit_op_jtrue(Instruction*);
         void emit_op_jtrue(Instruction*);

-        void emit_op_load_varargs(Instruction*);
-        void emit_op_loop(Instruction*);
-        void emit_op_loop_if_less(Instruction*);
-        void emit_op_loop_if_lesseq(Instruction*);
-        void emit_op_loop_if_true(Instruction*);
-        void emit_op_loop_if_false(Instruction*);
+        void emit_op_loop_hint(Instruction*);

         void emit_op_lshift(Instruction*);
         void emit_op_lshift(Instruction*);

-        void emit_op_method_check(Instruction*);

         void emit_op_mod(Instruction*);
         void emit_op_mov(Instruction*);
         void emit_op_mul(Instruction*);
         void emit_op_mod(Instruction*);
         void emit_op_mov(Instruction*);
         void emit_op_mul(Instruction*);


@@ -733,7 +698,8 @@ namespace JSC {
         void emit_op_neq(Instruction*);
         void emit_op_neq_null(Instruction*);
         void emit_op_new_array(Instruction*);
         void emit_op_neq(Instruction*);
         void emit_op_neq_null(Instruction*);
         void emit_op_new_array(Instruction*);

-        void emit_op_new_error(Instruction*);
+        void emit_op_new_array_with_size(Instruction*);
+        void emit_op_new_array_buffer(Instruction*);

         void emit_op_new_func(Instruction*);
         void emit_op_new_func_exp(Instruction*);
         void emit_op_new_object(Instruction*);
         void emit_op_new_func(Instruction*);
         void emit_op_new_func_exp(Instruction*);
         void emit_op_new_object(Instruction*);


@@ -743,30 +709,28 @@ namespace JSC {
         void emit_op_not(Instruction*);
         void emit_op_nstricteq(Instruction*);
         void emit_op_pop_scope(Instruction*);
         void emit_op_not(Instruction*);
         void emit_op_nstricteq(Instruction*);
         void emit_op_pop_scope(Instruction*);

-        void emit_op_post_dec(Instruction*);
-        void emit_op_post_inc(Instruction*);
-        void emit_op_pre_dec(Instruction*);
-        void emit_op_pre_inc(Instruction*);
+        void emit_op_dec(Instruction*);
+        void emit_op_inc(Instruction*);

         void emit_op_profile_did_call(Instruction*);
         void emit_op_profile_will_call(Instruction*);
         void emit_op_profile_did_call(Instruction*);
         void emit_op_profile_will_call(Instruction*);

-        void emit_op_push_new_scope(Instruction*);
-        void emit_op_push_scope(Instruction*);
+        void emit_op_push_name_scope(Instruction*);
+        void emit_op_push_with_scope(Instruction*);

         void emit_op_put_by_id(Instruction*);
         void emit_op_put_by_index(Instruction*);
         void emit_op_put_by_val(Instruction*);
         void emit_op_put_by_id(Instruction*);
         void emit_op_put_by_index(Instruction*);
         void emit_op_put_by_val(Instruction*);

-        void emit_op_put_getter(Instruction*);
-        void emit_op_put_global_var(Instruction*);
-        void emit_op_put_scoped_var(Instruction*);
-        void emit_op_put_setter(Instruction*);
+        void emit_op_put_getter_setter(Instruction*);
+        void emit_op_init_global_const(Instruction*);
+        void emit_op_init_global_const_check(Instruction*);
+        void emit_resolve_operations(ResolveOperations*, const int* base, const int* value);
+        void emitSlow_link_resolve_operations(ResolveOperations*, Vector<SlowCaseEntry>::iterator&);

         void emit_op_resolve(Instruction*);
         void emit_op_resolve_base(Instruction*);
         void emit_op_resolve(Instruction*);
         void emit_op_resolve_base(Instruction*);

-        void emit_op_resolve_global(Instruction*, bool dynamic = false);
-        void emit_op_resolve_global_dynamic(Instruction*);
-        void emit_op_resolve_skip(Instruction*);

         void emit_op_resolve_with_base(Instruction*);
         void emit_op_resolve_with_base(Instruction*);

+        void emit_op_resolve_with_this(Instruction*);
+        void emit_op_put_to_base(Instruction*);

         void emit_op_ret(Instruction*);
         void emit_op_ret(Instruction*);

+        void emit_op_ret_object_or_this(Instruction*);

         void emit_op_rshift(Instruction*);
         void emit_op_rshift(Instruction*);

-        void emit_op_sret(Instruction*);

         void emit_op_strcat(Instruction*);
         void emit_op_stricteq(Instruction*);
         void emit_op_sub(Instruction*);
         void emit_op_strcat(Instruction*);
         void emit_op_stricteq(Instruction*);
         void emit_op_sub(Instruction*);


@@ -776,91 +740,88 @@ namespace JSC {
         void emit_op_tear_off_activation(Instruction*);
         void emit_op_tear_off_arguments(Instruction*);
         void emit_op_throw(Instruction*);
         void emit_op_tear_off_activation(Instruction*);
         void emit_op_tear_off_arguments(Instruction*);
         void emit_op_throw(Instruction*);

-        void emit_op_to_jsnumber(Instruction*);
+        void emit_op_throw_static_error(Instruction*);
+        void emit_op_to_number(Instruction*);

         void emit_op_to_primitive(Instruction*);
         void emit_op_unexpected_load(Instruction*);
         void emit_op_urshift(Instruction*);
         void emit_op_to_primitive(Instruction*);
         void emit_op_unexpected_load(Instruction*);
         void emit_op_urshift(Instruction*);

-#if ENABLE(JIT_OPTIMIZE_MOD)
-        void softModulo();
-#endif
+        void emit_op_get_scoped_var(Instruction*);
+        void emit_op_put_scoped_var(Instruction*);

 
         void emitSlow_op_add(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_bitand(Instruction*, Vector<SlowCaseEntry>::iterator&);
 
         void emitSlow_op_add(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_bitand(Instruction*, Vector<SlowCaseEntry>::iterator&);

-        void emitSlow_op_bitnot(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_bitor(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_bitxor(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_call(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_call_eval(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_call_varargs(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_construct(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_bitor(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_bitxor(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_call(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_call_eval(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_call_varargs(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_construct(Instruction*, Vector<SlowCaseEntry>::iterator&);

-        void emitSlow_op_construct_verify(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_convert_this(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_convert_this(Instruction*, Vector<SlowCaseEntry>::iterator&);

+        void emitSlow_op_create_this(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_div(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_eq(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_div(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_eq(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);

+        void emitSlow_op_get_arguments_length(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_get_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_get_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);

+        void emitSlow_op_get_argument_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_get_by_pname(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_get_by_pname(Instruction*, Vector<SlowCaseEntry>::iterator&);

+        void emitSlow_op_check_has_instance(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_instanceof(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_jfalse(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_instanceof(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_jfalse(Instruction*, Vector<SlowCaseEntry>::iterator&);

-        void emitSlow_op_jnless(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_jless(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_jless(Instruction*, Vector<SlowCaseEntry>::iterator&);

-        void emitSlow_op_jlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&, bool invert = false);
+        void emitSlow_op_jlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_jgreater(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_jgreatereq(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_jnless(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_jnlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_jnlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);

+        void emitSlow_op_jngreater(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_jngreatereq(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_jtrue(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_jtrue(Instruction*, Vector<SlowCaseEntry>::iterator&);

-        void emitSlow_op_loop_if_less(Instruction*, Vector<SlowCaseEntry>::iterator&);
-        void emitSlow_op_loop_if_lesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
-        void emitSlow_op_loop_if_true(Instruction*, Vector<SlowCaseEntry>::iterator&);
-        void emitSlow_op_loop_if_false(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_loop_hint(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_lshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_lshift(Instruction*, Vector<SlowCaseEntry>::iterator&);

-        void emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_mod(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_mul(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_negate(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_neq(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_mod(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_mul(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_negate(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_neq(Instruction*, Vector<SlowCaseEntry>::iterator&);

+        void emitSlow_op_new_object(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_not(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_nstricteq(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_not(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_nstricteq(Instruction*, Vector<SlowCaseEntry>::iterator&);

-        void emitSlow_op_post_dec(Instruction*, Vector<SlowCaseEntry>::iterator&);
-        void emitSlow_op_post_inc(Instruction*, Vector<SlowCaseEntry>::iterator&);
-        void emitSlow_op_pre_dec(Instruction*, Vector<SlowCaseEntry>::iterator&);
-        void emitSlow_op_pre_inc(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_dec(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_inc(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_put_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_put_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_put_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_put_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);

-        void emitSlow_op_resolve_global(Instruction*, Vector<SlowCaseEntry>::iterator&);
-        void emitSlow_op_resolve_global_dynamic(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_init_global_const_check(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_rshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_stricteq(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_sub(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_rshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_stricteq(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_sub(Instruction*, Vector<SlowCaseEntry>::iterator&);

-        void emitSlow_op_to_jsnumber(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_to_number(Instruction*, Vector<SlowCaseEntry>::iterator&);

         void emitSlow_op_to_primitive(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_urshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
 
         void emitSlow_op_to_primitive(Instruction*, Vector<SlowCaseEntry>::iterator&);
         void emitSlow_op_urshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
 

-        
+        void emitSlow_op_resolve(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_resolve_base(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_resolve_with_base(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_resolve_with_this(Instruction*, Vector<SlowCaseEntry>::iterator&);
+        void emitSlow_op_put_to_base(Instruction*, Vector<SlowCaseEntry>::iterator&);
+

         void emitRightShift(Instruction*, bool isUnsigned);
         void emitRightShiftSlowCase(Instruction*, Vector<SlowCaseEntry>::iterator&, bool isUnsigned);
 
         void emitRightShift(Instruction*, bool isUnsigned);
         void emitRightShiftSlowCase(Instruction*, Vector<SlowCaseEntry>::iterator&, bool isUnsigned);
 

-        /* These functions are deprecated: Please use JITStubCall instead. */
-        void emitPutJITStubArg(RegisterID src, unsigned argumentNumber);
-#if USE(JSVALUE32_64)
-        void emitPutJITStubArg(RegisterID tag, RegisterID payload, unsigned argumentNumber);
-        void emitPutJITStubArgFromVirtualRegister(unsigned src, unsigned argumentNumber, RegisterID scratch1, RegisterID scratch2);
-#else
-        void emitPutJITStubArgFromVirtualRegister(unsigned src, unsigned argumentNumber, RegisterID scratch);
-#endif
-        void emitPutJITStubArgConstant(unsigned value, unsigned argumentNumber);
-        void emitPutJITStubArgConstant(void* value, unsigned argumentNumber);
-        void emitGetJITStubArg(unsigned argumentNumber, RegisterID dst);
-

         void emitInitRegister(unsigned dst);
 
         void emitInitRegister(unsigned dst);
 

-        void emitPutToCallFrameHeader(RegisterID from, RegisterFile::CallFrameHeaderEntry entry);
-        void emitPutImmediateToCallFrameHeader(void* value, RegisterFile::CallFrameHeaderEntry entry);
-        void emitGetFromCallFrameHeaderPtr(RegisterFile::CallFrameHeaderEntry entry, RegisterID to, RegisterID from = callFrameRegister);
-        void emitGetFromCallFrameHeader32(RegisterFile::CallFrameHeaderEntry entry, RegisterID to, RegisterID from = callFrameRegister);
+        void emitPutIntToCallFrameHeader(RegisterID from, JSStack::CallFrameHeaderEntry);
+        void emitGetFromCallFrameHeaderPtr(JSStack::CallFrameHeaderEntry, RegisterID to, RegisterID from = callFrameRegister);
+        void emitGetFromCallFrameHeader32(JSStack::CallFrameHeaderEntry, RegisterID to, RegisterID from = callFrameRegister);
+#if USE(JSVALUE64)
+        void emitGetFromCallFrameHeader64(JSStack::CallFrameHeaderEntry, RegisterID to, RegisterID from = callFrameRegister);
+#endif

 
         JSValue getConstantOperand(unsigned src);
         bool isOperandConstantImmediateInt(unsigned src);
         bool isOperandConstantImmediateChar(unsigned src);
 
 
         JSValue getConstantOperand(unsigned src);
         bool isOperandConstantImmediateInt(unsigned src);
         bool isOperandConstantImmediateChar(unsigned src);
 

+        bool atJumpTarget();
+

         Jump getSlowCase(Vector<SlowCaseEntry>::iterator& iter)
         {
             return iter++->from;
         Jump getSlowCase(Vector<SlowCaseEntry>::iterator& iter)
         {
             return iter++->from;


@@ -870,23 +831,29 @@ namespace JSC {
             iter->from.link(this);
             ++iter;
         }
             iter->from.link(this);
             ++iter;
         }

-        void linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator&, int vReg);
+        void linkDummySlowCase(Vector<SlowCaseEntry>::iterator& iter)
+        {
+            ASSERT(!iter->from.isSet());
+            ++iter;
+        }
+        void linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator&, int virtualRegisterIndex);

 
         Jump checkStructure(RegisterID reg, Structure* structure);
 
 
         Jump checkStructure(RegisterID reg, Structure* structure);
 

-        void restoreArgumentReference();

         void restoreArgumentReferenceForTrampoline();
         void restoreArgumentReferenceForTrampoline();

+        void updateTopCallFrame();

 
         Call emitNakedCall(CodePtr function = CodePtr());
 
 
         Call emitNakedCall(CodePtr function = CodePtr());
 

-        void preserveReturnAddressAfterCall(RegisterID);
-        void restoreReturnAddressBeforeReturn(RegisterID);
-        void restoreReturnAddressBeforeReturn(Address);
-

         // Loads the character value of a single character string into dst.
         void emitLoadCharacterString(RegisterID src, RegisterID dst, JumpList& failures);
         
         // Loads the character value of a single character string into dst.
         void emitLoadCharacterString(RegisterID src, RegisterID dst, JumpList& failures);
         

-        void emitTimeoutCheck();
+#if ENABLE(DFG_JIT)
+        void emitEnterOptimizationCheck();
+#else
+        void emitEnterOptimizationCheck() { }
+#endif
+

 #ifndef NDEBUG
         void printBytecodeOperandTypes(unsigned src1, unsigned src2);
 #endif
 #ifndef NDEBUG
         void printBytecodeOperandTypes(unsigned src1, unsigned src2);
 #endif


@@ -897,7 +864,7 @@ namespace JSC {
 #endif
 
 #if ENABLE(SAMPLING_COUNTERS)
 #endif
 
 #if ENABLE(SAMPLING_COUNTERS)

-        void emitCount(AbstractSamplingCounter&, uint32_t = 1);
+        void emitCount(AbstractSamplingCounter&, int32_t = 1);

 #endif
 
 #if ENABLE(OPCODE_SAMPLING)
 #endif
 
 #if ENABLE(OPCODE_SAMPLING)


@@ -910,36 +877,48 @@ namespace JSC {
         void sampleCodeBlock(CodeBlock*) {}
 #endif
 
         void sampleCodeBlock(CodeBlock*) {}
 #endif
 

+#if ENABLE(DFG_JIT)
+        bool canBeOptimized() { return m_canBeOptimized; }
+        bool canBeOptimizedOrInlined() { return m_canBeOptimizedOrInlined; }
+        bool shouldEmitProfiling() { return m_shouldEmitProfiling; }
+#else
+        bool canBeOptimized() { return false; }
+        bool canBeOptimizedOrInlined() { return false; }
+        // Enables use of value profiler with tiered compilation turned off,
+        // in which case all code gets profiled.
+        bool shouldEmitProfiling() { return false; }
+#endif
+

         Interpreter* m_interpreter;
         Interpreter* m_interpreter;

-        JSGlobalData* m_globalData;
+        VM* m_vm;

         CodeBlock* m_codeBlock;
 
         Vector<CallRecord> m_calls;
         Vector<Label> m_labels;
         Vector<PropertyStubCompilationInfo> m_propertyAccessCompilationInfo;
         CodeBlock* m_codeBlock;
 
         Vector<CallRecord> m_calls;
         Vector<Label> m_labels;
         Vector<PropertyStubCompilationInfo> m_propertyAccessCompilationInfo;

+        Vector<ByValCompilationInfo> m_byValCompilationInfo;

         Vector<StructureStubCompilationInfo> m_callStructureStubCompilationInfo;
         Vector<StructureStubCompilationInfo> m_callStructureStubCompilationInfo;

-        Vector<MethodCallCompilationInfo> m_methodCallCompilationInfo;

         Vector<JumpTable> m_jmpTable;
 
         Vector<JumpTable> m_jmpTable;
 

-        unsigned m_bytecodeIndex;
-        Vector<JSRInfo> m_jsrSites;
+        unsigned m_bytecodeOffset;

         Vector<SlowCaseEntry> m_slowCases;
         Vector<SwitchRecord> m_switches;
 
         unsigned m_propertyAccessInstructionIndex;
         Vector<SlowCaseEntry> m_slowCases;
         Vector<SwitchRecord> m_switches;
 
         unsigned m_propertyAccessInstructionIndex;

+        unsigned m_byValInstructionIndex;

         unsigned m_globalResolveInfoIndex;
         unsigned m_callLinkInfoIndex;
 
 #if USE(JSVALUE32_64)
         unsigned m_jumpTargetIndex;
         unsigned m_globalResolveInfoIndex;
         unsigned m_callLinkInfoIndex;
 
 #if USE(JSVALUE32_64)
         unsigned m_jumpTargetIndex;

-        unsigned m_mappedBytecodeIndex;
-        unsigned m_mappedVirtualRegisterIndex;
+        unsigned m_mappedBytecodeOffset;
+        int m_mappedVirtualRegisterIndex;

         RegisterID m_mappedTag;
         RegisterID m_mappedPayload;
 #else
         int m_lastResultBytecodeRegister;
         RegisterID m_mappedTag;
         RegisterID m_mappedPayload;
 #else
         int m_lastResultBytecodeRegister;

-        unsigned m_jumpTargetsPosition;

 #endif
 #endif

+        unsigned m_jumpTargetsPosition;

 
 #ifndef NDEBUG
 #if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL
 
 #ifndef NDEBUG
 #if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL


@@ -947,48 +926,18 @@ namespace JSC {
         int m_uninterruptedConstantSequenceBegin;
 #endif
 #endif
         int m_uninterruptedConstantSequenceBegin;
 #endif
 #endif

-        static PassRefPtr<NativeExecutable> stringGetByValStubGenerator(JSGlobalData* globalData, ExecutablePool* pool);
+        OwnPtr<JITDisassembler> m_disassembler;
+        RefPtr<Profiler::Compilation> m_compilation;
+        WeakRandom m_randomGenerator;
+        static CodeRef stringGetByValStubGenerator(VM*);
+
+#if ENABLE(VALUE_PROFILER)
+        bool m_canBeOptimized;
+        bool m_canBeOptimizedOrInlined;
+        bool m_shouldEmitProfiling;
+#endif

     } JIT_CLASS_ALIGNMENT;
 
     } JIT_CLASS_ALIGNMENT;
 

-    inline void JIT::emit_op_loop(Instruction* currentInstruction)
-    {
-        emitTimeoutCheck();
-        emit_op_jmp(currentInstruction);
-    }
-
-    inline void JIT::emit_op_loop_if_true(Instruction* currentInstruction)
-    {
-        emitTimeoutCheck();
-        emit_op_jtrue(currentInstruction);
-    }
-
-    inline void JIT::emitSlow_op_loop_if_true(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-    {
-        emitSlow_op_jtrue(currentInstruction, iter);
-    }
-
-    inline void JIT::emit_op_loop_if_false(Instruction* currentInstruction)
-    {
-        emitTimeoutCheck();
-        emit_op_jfalse(currentInstruction);
-    }
-
-    inline void JIT::emitSlow_op_loop_if_false(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-    {
-        emitSlow_op_jfalse(currentInstruction, iter);
-    }
-
-    inline void JIT::emit_op_loop_if_less(Instruction* currentInstruction)
-    {
-        emitTimeoutCheck();
-        emit_op_jless(currentInstruction);
-    }
-
-    inline void JIT::emitSlow_op_loop_if_less(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
-    {
-        emitSlow_op_jless(currentInstruction, iter);
-    }
-

 } // namespace JSC
 
 #endif // ENABLE(JIT)
 } // namespace JSC
 
 #endif // ENABLE(JIT)