--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/JavaScriptCore/jit/JIT.h Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,989 @@
+/*
+ * Copyright (C) 2008 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef JIT_h
+#define JIT_h
+
+#if ENABLE(JIT)
+
+// 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)
+#define JIT_CLASS_ALIGNMENT __attribute__ ((aligned (32)))
+#else
+#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));
+
+#include "CodeBlock.h"
+#include "Interpreter.h"
+#include "JSInterfaceJIT.h"
+#include "Opcode.h"
+#include "Profiler.h"
+#include <bytecode/SamplingTool.h>
+
+namespace JSC {
+
+ class CodeBlock;
+ class JIT;
+ class JSPropertyNameIterator;
+ class Interpreter;
+ class Register;
+ class RegisterFile;
+ class ScopeChainNode;
+ class StructureChain;
+
+ struct CallLinkInfo;
+ struct Instruction;
+ struct OperandTypes;
+ struct PolymorphicAccessStructureList;
+ struct SimpleJumpTable;
+ struct StringJumpTable;
+ struct StructureStubInfo;
+
+ struct CallRecord {
+ MacroAssembler::Call from;
+ unsigned bytecodeOffset;
+ void* to;
+
+ CallRecord()
+ {
+ }
+
+ CallRecord(MacroAssembler::Call from, unsigned bytecodeOffset, void* to = 0)
+ : from(from)
+ , bytecodeOffset(bytecodeOffset)
+ , to(to)
+ {
+ }
+ };
+
+ struct JumpTable {
+ MacroAssembler::Jump from;
+ unsigned toBytecodeOffset;
+
+ JumpTable(MacroAssembler::Jump f, unsigned t)
+ : from(f)
+ , toBytecodeOffset(t)
+ {
+ }
+ };
+
+ struct SlowCaseEntry {
+ MacroAssembler::Jump from;
+ unsigned to;
+ unsigned hint;
+
+ SlowCaseEntry(MacroAssembler::Jump f, unsigned t, unsigned h = 0)
+ : from(f)
+ , to(t)
+ , hint(h)
+ {
+ }
+ };
+
+ struct SwitchRecord {
+ enum Type {
+ Immediate,
+ Character,
+ String
+ };
+
+ Type type;
+
+ union {
+ SimpleJumpTable* simpleJumpTable;
+ StringJumpTable* stringJumpTable;
+ } jumpTable;
+
+ unsigned bytecodeOffset;
+ unsigned defaultOffset;
+
+ SwitchRecord(SimpleJumpTable* jumpTable, unsigned bytecodeOffset, unsigned defaultOffset, Type type)
+ : type(type)
+ , bytecodeOffset(bytecodeOffset)
+ , defaultOffset(defaultOffset)
+ {
+ this->jumpTable.simpleJumpTable = jumpTable;
+ }
+
+ SwitchRecord(StringJumpTable* jumpTable, unsigned bytecodeOffset, unsigned defaultOffset)
+ : type(String)
+ , bytecodeOffset(bytecodeOffset)
+ , defaultOffset(defaultOffset)
+ {
+ this->jumpTable.stringJumpTable = jumpTable;
+ }
+ };
+
+ struct PropertyStubCompilationInfo {
+ MacroAssembler::Call callReturnLocation;
+ MacroAssembler::Label hotPathBegin;
+ };
+
+ struct StructureStubCompilationInfo {
+ MacroAssembler::DataLabelPtr hotPathBegin;
+ MacroAssembler::Call hotPathOther;
+ MacroAssembler::Call callReturnLocation;
+ };
+
+ struct MethodCallCompilationInfo {
+ MethodCallCompilationInfo(unsigned propertyAccessIndex)
+ : propertyAccessIndex(propertyAccessIndex)
+ {
+ }
+
+ MacroAssembler::DataLabelPtr structureToCompare;
+ unsigned propertyAccessIndex;
+ };
+
+ // Near calls can only be patched to other JIT code, regular calls can be patched to JIT code or relinked to stub functions.
+ void ctiPatchNearCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, MacroAssemblerCodePtr newCalleeFunction);
+ void ctiPatchCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, MacroAssemblerCodePtr newCalleeFunction);
+ void ctiPatchCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, FunctionPtr newCalleeFunction);
+
+ class JIT : private JSInterfaceJIT {
+ friend class JITStubCall;
+
+ using MacroAssembler::Jump;
+ using MacroAssembler::JumpList;
+ using MacroAssembler::Label;
+
+ static const int patchGetByIdDefaultStructure = -1;
+ // 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;
+
+ public:
+ static JITCode compile(JSGlobalData* globalData, CodeBlock* codeBlock, CodePtr* functionEntryArityCheck = 0)
+ {
+ return JIT(globalData, codeBlock).privateCompile(functionEntryArityCheck);
+ }
+
+ 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)
+ {
+ JIT jit(globalData, codeBlock);
+ 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)
+ {
+ JIT jit(globalData, codeBlock);
+ 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)
+ {
+ JIT jit(globalData, codeBlock);
+ 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)
+ {
+ JIT jit(globalData, codeBlock);
+ 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)
+ {
+ JIT jit(globalData, codeBlock);
+ 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)
+ {
+ JIT jit(globalData, codeBlock);
+ jit.privateCompilePutByIdTransition(stubInfo, oldStructure, newStructure, cachedOffset, chain, returnAddress, direct);
+ }
+
+ static void compileCTIMachineTrampolines(JSGlobalData* globalData, RefPtr<ExecutablePool>* executablePool, TrampolineStructure *trampolines)
+ {
+ if (!globalData->canUseJIT())
+ return;
+ JIT jit(globalData);
+ jit.privateCompileCTIMachineTrampolines(executablePool, globalData, trampolines);
+ }
+
+ static CodePtr compileCTINativeCall(JSGlobalData* globalData, PassRefPtr<ExecutablePool> executablePool, NativeFunction func)
+ {
+ if (!globalData->canUseJIT())
+ return CodePtr();
+ JIT jit(globalData);
+ return jit.privateCompileCTINativeCall(executablePool, globalData, 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 compilePatchGetArrayLength(JSGlobalData* globalData, CodeBlock* codeBlock, ReturnAddressPtr returnAddress)
+ {
+ JIT jit(globalData, codeBlock);
+ return jit.privateCompilePatchGetArrayLength(returnAddress);
+ }
+
+ static void linkCall(JSFunction* callee, CodeBlock* callerCodeBlock, CodeBlock* calleeCodeBlock, CodePtr, CallLinkInfo*, int callerArgCount, JSGlobalData*);
+ static void linkConstruct(JSFunction* callee, CodeBlock* callerCodeBlock, CodeBlock* calleeCodeBlock, CodePtr, CallLinkInfo*, int callerArgCount, JSGlobalData*);
+ static void unlinkCallOrConstruct(CallLinkInfo*);
+
+ private:
+ struct JSRInfo {
+ DataLabelPtr storeLocation;
+ Label target;
+
+ JSRInfo(DataLabelPtr storeLocation, Label targetLocation)
+ : storeLocation(storeLocation)
+ , target(targetLocation)
+ {
+ }
+ };
+
+ JIT(JSGlobalData*, CodeBlock* = 0);
+
+ void privateCompileMainPass();
+ void privateCompileLinkPass();
+ void privateCompileSlowCases();
+ JITCode privateCompile(CodePtr* functionEntryArityCheck);
+ 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);
+ Label privateCompileCTINativeCall(JSGlobalData*, bool isConstruct = false);
+ CodePtr privateCompileCTINativeCall(PassRefPtr<ExecutablePool> executablePool, JSGlobalData* data, NativeFunction func);
+ void privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress);
+
+ void addSlowCase(Jump);
+ void addSlowCase(JumpList);
+ void addJump(Jump, int);
+ void emitJumpSlowToHot(Jump, int);
+
+ void compileOpCall(OpcodeID, Instruction* instruction, unsigned callLinkInfoIndex);
+ void compileOpCallVarargs(Instruction* instruction);
+ void compileOpCallInitializeCallFrame();
+ void compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex, OpcodeID opcodeID);
+ void compileOpCallVarargsSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter);
+
+ 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);
+
+#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 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 bytecodeOffset);
+ void map(unsigned bytecodeOffset, unsigned virtualRegisterIndex, RegisterID tag, RegisterID payload);
+ 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);
+
+#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);
+
+ // 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)
+ static const int patchOffsetGetByIdSlowCaseCall = 37;
+#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;
+
+ // 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
+ static const int sequenceGetByIdSlowCaseInstructionSpace = 40;
+ static const int sequenceGetByIdSlowCaseConstantSpace = 2;
+ // 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;
+
+ // 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
+ static const int sequenceGetByIdSlowCaseInstructionSpace = 40;
+ static const int sequenceGetByIdSlowCaseConstantSpace = 2;
+ // sequencePutById
+ static const int sequencePutByIdInstructionSpace = 36;
+ static const int sequencePutByIdConstantSpace = 4;
+#else
+#error "JSVALUE32_64 not supported on this platform."
+#endif
+
+#else // USE(JSVALUE32_64)
+ void emitGetVirtualRegister(int src, RegisterID dst);
+ void emitGetVirtualRegisters(int src1, RegisterID dst1, int src2, RegisterID dst2);
+ void emitPutVirtualRegister(unsigned dst, RegisterID from = regT0);
+
+ 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);
+ Jump emitJumpIfNotJSCell(RegisterID);
+ 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);
+ 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 emitFastArithIntToImmNoCheck(RegisterID src, RegisterID dest);
+
+ 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);
+#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)
+ static const int patchOffsetGetByIdSlowCaseCall = 33;
+#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;
+
+ // 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)
+
+#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)
+
+ void beginUninterruptedSequence(int, int);
+ void endUninterruptedSequence(int, int);
+
+#else
+#define BEGIN_UNINTERRUPTED_SEQUENCE(name)
+#define END_UNINTERRUPTED_SEQUENCE(name)
+#endif
+
+ 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_call_put_result(Instruction*);
+ void emit_op_catch(Instruction*);
+ void emit_op_construct(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_del_by_id(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_eq(Instruction*);
+ void emit_op_eq_null(Instruction*);
+ void emit_op_get_by_id(Instruction*);
+ void emit_op_get_by_val(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_instanceof(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_jnless(Instruction*);
+ void emit_op_jless(Instruction*);
+ void emit_op_jlesseq(Instruction*, bool invert = false);
+ void emit_op_jnlesseq(Instruction*);
+ void emit_op_jsr(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_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_negate(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_func(Instruction*);
+ void emit_op_new_func_exp(Instruction*);
+ void emit_op_new_object(Instruction*);
+ void emit_op_new_regexp(Instruction*);
+ void emit_op_get_pnames(Instruction*);
+ void emit_op_next_pname(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_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_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_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_ret(Instruction*);
+ void emit_op_ret_object_or_this(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_switch_char(Instruction*);
+ void emit_op_switch_imm(Instruction*);
+ void emit_op_switch_string(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_to_primitive(Instruction*);
+ void emit_op_unexpected_load(Instruction*);
+ void emit_op_urshift(Instruction*);
+#if ENABLE(JIT_OPTIMIZE_MOD)
+ void softModulo();
+#endif
+
+ 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_convert_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_get_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
+ void emitSlow_op_get_by_pname(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_jlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&, bool invert = false);
+ void emitSlow_op_jnlesseq(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_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_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_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_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_primitive(Instruction*, Vector<SlowCaseEntry>::iterator&);
+ void emitSlow_op_urshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
+
+
+ void emitRightShift(Instruction*, bool isUnsigned);
+ void emitRightShiftSlowCase(Instruction*, Vector<SlowCaseEntry>::iterator&, bool isUnsigned);
+
+ /* This function is deprecated. */
+ void emitGetJITStubArg(unsigned argumentNumber, RegisterID 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);
+
+ JSValue getConstantOperand(unsigned src);
+ bool isOperandConstantImmediateInt(unsigned src);
+ bool isOperandConstantImmediateChar(unsigned src);
+
+ Jump getSlowCase(Vector<SlowCaseEntry>::iterator& iter)
+ {
+ return iter++->from;
+ }
+ void linkSlowCase(Vector<SlowCaseEntry>::iterator& iter)
+ {
+ iter->from.link(this);
+ ++iter;
+ }
+ void linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator&, int vReg);
+
+ Jump checkStructure(RegisterID reg, Structure* structure);
+
+ void restoreArgumentReference();
+ void restoreArgumentReferenceForTrampoline();
+
+ 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);
+
+ void emitTimeoutCheck();
+#ifndef NDEBUG
+ void printBytecodeOperandTypes(unsigned src1, unsigned src2);
+#endif
+
+#if ENABLE(SAMPLING_FLAGS)
+ void setSamplingFlag(int32_t);
+ void clearSamplingFlag(int32_t);
+#endif
+
+#if ENABLE(SAMPLING_COUNTERS)
+ void emitCount(AbstractSamplingCounter&, uint32_t = 1);
+#endif
+
+#if ENABLE(OPCODE_SAMPLING)
+ void sampleInstruction(Instruction*, bool = false);
+#endif
+
+#if ENABLE(CODEBLOCK_SAMPLING)
+ void sampleCodeBlock(CodeBlock*);
+#else
+ void sampleCodeBlock(CodeBlock*) {}
+#endif
+
+ Interpreter* m_interpreter;
+ JSGlobalData* m_globalData;
+ CodeBlock* m_codeBlock;
+
+ Vector<CallRecord> m_calls;
+ Vector<Label> m_labels;
+ Vector<PropertyStubCompilationInfo> m_propertyAccessCompilationInfo;
+ Vector<StructureStubCompilationInfo> m_callStructureStubCompilationInfo;
+ Vector<MethodCallCompilationInfo> m_methodCallCompilationInfo;
+ Vector<JumpTable> m_jmpTable;
+
+ unsigned m_bytecodeOffset;
+ Vector<JSRInfo> m_jsrSites;
+ Vector<SlowCaseEntry> m_slowCases;
+ Vector<SwitchRecord> m_switches;
+
+ unsigned m_propertyAccessInstructionIndex;
+ unsigned m_globalResolveInfoIndex;
+ unsigned m_callLinkInfoIndex;
+
+#if USE(JSVALUE32_64)
+ unsigned m_jumpTargetIndex;
+ unsigned m_mappedBytecodeOffset;
+ unsigned m_mappedVirtualRegisterIndex;
+ RegisterID m_mappedTag;
+ RegisterID m_mappedPayload;
+#else
+ int m_lastResultBytecodeRegister;
+ unsigned m_jumpTargetsPosition;
+#endif
+
+#ifndef NDEBUG
+#if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL
+ Label m_uninterruptedInstructionSequenceBegin;
+ int m_uninterruptedConstantSequenceBegin;
+#endif
+#endif
+ static CodePtr stringGetByValStubGenerator(JSGlobalData* globalData, ExecutablePool* pool);
+ } 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)
+
+#endif // JIT_h