code.vuplus.com Git - vuplus_webkit/blob - Source/JavaScriptCore/jit/JIT.h

   1 /*
   2  * Copyright (C) 2008 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef JIT_h
  27 #define JIT_h
  28
  29 #if ENABLE(JIT)
  30
  31 // Verbose logging for OSR-related code.
  32 #define ENABLE_JIT_VERBOSE_OSR 0
  33
  34 // We've run into some problems where changing the size of the class JIT leads to
  35 // performance fluctuations.  Try forcing alignment in an attempt to stabalize this.
  36 #if COMPILER(GCC)
  37 #define JIT_CLASS_ALIGNMENT __attribute__ ((aligned (32)))
  38 #else
  39 #define JIT_CLASS_ALIGNMENT
  40 #endif
  41
  42 #define ASSERT_JIT_OFFSET_UNUSED(variable, actual, expected) ASSERT_WITH_MESSAGE_UNUSED(variable, actual == expected, "JIT Offset \"%s\" should be %d, not %d.\n", #expected, static_cast<int>(expected), static_cast<int>(actual));
  43 #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));
  44
  45 #include "CodeBlock.h"
  46 #include "CompactJITCodeMap.h"
  47 #include "Interpreter.h"
  48 #include "JSInterfaceJIT.h"
  49 #include "Opcode.h"
  50 #include "Profiler.h"
  51 #include <bytecode/SamplingTool.h>
  52
  53 namespace JSC {
  54
  55     class CodeBlock;
  56     class FunctionExecutable;
  57     class JIT;
  58     class JSPropertyNameIterator;
  59     class Interpreter;
  60     class Register;
  61     class RegisterFile;
  62     class ScopeChainNode;
  63     class StructureChain;
  64
  65     struct CallLinkInfo;
  66     struct Instruction;
  67     struct OperandTypes;
  68     struct PolymorphicAccessStructureList;
  69     struct SimpleJumpTable;
  70     struct StringJumpTable;
  71     struct StructureStubInfo;
  72
  73     struct CallRecord {
  74         MacroAssembler::Call from;
  75         unsigned bytecodeOffset;
  76         void* to;
  77
  78         CallRecord()
  79         {
  80         }
  81
  82         CallRecord(MacroAssembler::Call from, unsigned bytecodeOffset, void* to = 0)
  83             : from(from)
  84             , bytecodeOffset(bytecodeOffset)
  85             , to(to)
  86         {
  87         }
  88     };
  89
  90     struct JumpTable {
  91         MacroAssembler::Jump from;
  92         unsigned toBytecodeOffset;
  93
  94         JumpTable(MacroAssembler::Jump f, unsigned t)
  95             : from(f)
  96             , toBytecodeOffset(t)
  97         {
  98         }
  99     };
 100
 101     struct SlowCaseEntry {
 102         MacroAssembler::Jump from;
 103         unsigned to;
 104         unsigned hint;
 105
 106         SlowCaseEntry(MacroAssembler::Jump f, unsigned t, unsigned h = 0)
 107             : from(f)
 108             , to(t)
 109             , hint(h)
 110         {
 111         }
 112     };
 113
 114     struct SwitchRecord {
 115         enum Type {
 116             Immediate,
 117             Character,
 118             String
 119         };
 120
 121         Type type;
 122
 123         union {
 124             SimpleJumpTable* simpleJumpTable;
 125             StringJumpTable* stringJumpTable;
 126         } jumpTable;
 127
 128         unsigned bytecodeOffset;
 129         unsigned defaultOffset;
 130
 131         SwitchRecord(SimpleJumpTable* jumpTable, unsigned bytecodeOffset, unsigned defaultOffset, Type type)
 132             : type(type)
 133             , bytecodeOffset(bytecodeOffset)
 134             , defaultOffset(defaultOffset)
 135         {
 136             this->jumpTable.simpleJumpTable = jumpTable;
 137         }
 138
 139         SwitchRecord(StringJumpTable* jumpTable, unsigned bytecodeOffset, unsigned defaultOffset)
 140             : type(String)
 141             , bytecodeOffset(bytecodeOffset)
 142             , defaultOffset(defaultOffset)
 143         {
 144             this->jumpTable.stringJumpTable = jumpTable;
 145         }
 146     };
 147
 148     struct PropertyStubCompilationInfo {
 149         MacroAssembler::Call callReturnLocation;
 150         MacroAssembler::Label hotPathBegin;
 151     };
 152
 153     struct StructureStubCompilationInfo {
 154         MacroAssembler::DataLabelPtr hotPathBegin;
 155         MacroAssembler::Call hotPathOther;
 156         MacroAssembler::Call callReturnLocation;
 157         bool isCall;
 158     };
 159
 160     struct MethodCallCompilationInfo {
 161         MethodCallCompilationInfo(unsigned propertyAccessIndex)
 162             : propertyAccessIndex(propertyAccessIndex)
 163         {
 164         }
 165
 166         MacroAssembler::DataLabelPtr structureToCompare;
 167         unsigned propertyAccessIndex;
 168     };
 169
 170     // Near calls can only be patched to other JIT code, regular calls can be patched to JIT code or relinked to stub functions.
 171     void ctiPatchNearCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, MacroAssemblerCodePtr newCalleeFunction);
 172     void ctiPatchCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, MacroAssemblerCodePtr newCalleeFunction);
 173     void ctiPatchCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, FunctionPtr newCalleeFunction);
 174
 175     class JIT : private JSInterfaceJIT {
 176         friend class JITStubCall;
 177
 178         using MacroAssembler::Jump;
 179         using MacroAssembler::JumpList;
 180         using MacroAssembler::Label;
 181
 182         static const int patchGetByIdDefaultStructure = -1;
 183         static const int patchGetByIdDefaultOffset = 0;
 184         // Magic number - initial offset cannot be representable as a signed 8bit value, or the X86Assembler
 185         // will compress the displacement, and we may not be able to fit a patched offset.
 186         static const int patchPutByIdDefaultOffset = 256;
 187
 188     public:
 189         static JITCode compile(JSGlobalData* globalData, CodeBlock* codeBlock, CodePtr* functionEntryArityCheck = 0)
 190         {
 191             return JIT(globalData, codeBlock).privateCompile(functionEntryArityCheck);
 192         }
 193
 194         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)
 195         {
 196             JIT jit(globalData, codeBlock);
 197             jit.privateCompileGetByIdProto(stubInfo, structure, prototypeStructure, ident, slot, cachedOffset, returnAddress, callFrame);
 198         }
 199
 200         static void compileGetByIdSelfList(JSGlobalData* globalData, CodeBlock* codeBlock, StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset)
 201         {
 202             JIT jit(globalData, codeBlock);
 203             jit.privateCompileGetByIdSelfList(stubInfo, polymorphicStructures, currentIndex, structure, ident, slot, cachedOffset);
 204         }
 205         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)
 206         {
 207             JIT jit(globalData, codeBlock);
 208             jit.privateCompileGetByIdProtoList(stubInfo, prototypeStructureList, currentIndex, structure, prototypeStructure, ident, slot, cachedOffset, callFrame);
 209         }
 210         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)
 211         {
 212             JIT jit(globalData, codeBlock);
 213             jit.privateCompileGetByIdChainList(stubInfo, prototypeStructureList, currentIndex, structure, chain, count, ident, slot, cachedOffset, callFrame);
 214         }
 215
 216         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)
 217         {
 218             JIT jit(globalData, codeBlock);
 219             jit.privateCompileGetByIdChain(stubInfo, structure, chain, count, ident, slot, cachedOffset, returnAddress, callFrame);
 220         }
 221
 222         static void compilePutByIdTransition(JSGlobalData* globalData, CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress, bool direct)
 223         {
 224             JIT jit(globalData, codeBlock);
 225             jit.privateCompilePutByIdTransition(stubInfo, oldStructure, newStructure, cachedOffset, chain, returnAddress, direct);
 226         }
 227
 228         static PassRefPtr<ExecutableMemoryHandle> compileCTIMachineTrampolines(JSGlobalData* globalData, TrampolineStructure *trampolines)
 229         {
 230             if (!globalData->canUseJIT())
 231                 return 0;
 232             JIT jit(globalData, 0);
 233             return jit.privateCompileCTIMachineTrampolines(globalData, trampolines);
 234         }
 235
 236         static CodeRef compileCTINativeCall(JSGlobalData* globalData, NativeFunction func)
 237         {
 238             if (!globalData->canUseJIT())
 239                 return CodeRef();
 240             JIT jit(globalData, 0);
 241             return jit.privateCompileCTINativeCall(globalData, func);
 242         }
 243
 244         static void patchGetByIdSelf(CodeBlock* codeblock, StructureStubInfo*, Structure*, size_t cachedOffset, ReturnAddressPtr returnAddress);
 245         static void patchPutByIdReplace(CodeBlock* codeblock, StructureStubInfo*, Structure*, size_t cachedOffset, ReturnAddressPtr returnAddress, bool direct);
 246         static void patchMethodCallProto(JSGlobalData&, CodeBlock* codeblock, MethodCallLinkInfo&, JSObject*, Structure*, JSObject*, ReturnAddressPtr);
 247
 248         static void compilePatchGetArrayLength(JSGlobalData* globalData, CodeBlock* codeBlock, ReturnAddressPtr returnAddress)
 249         {
 250             JIT jit(globalData, codeBlock);
 251             return jit.privateCompilePatchGetArrayLength(returnAddress);
 252         }
 253
 254         static void linkFor(JSFunction* callee, CodeBlock* callerCodeBlock, CodeBlock* calleeCodeBlock, CodePtr, CallLinkInfo*, int callerArgCount, JSGlobalData*, CodeSpecializationKind);
 255
 256     private:
 257         struct JSRInfo {
 258             DataLabelPtr storeLocation;
 259             Label target;
 260
 261             JSRInfo(DataLabelPtr storeLocation, Label targetLocation)
 262                 : storeLocation(storeLocation)
 263                 , target(targetLocation)
 264             {
 265             }
 266         };
 267
 268         JIT(JSGlobalData*, CodeBlock* = 0);
 269
 270         void privateCompileMainPass();
 271         void privateCompileLinkPass();
 272         void privateCompileSlowCases();
 273         JITCode privateCompile(CodePtr* functionEntryArityCheck);
 274         void privateCompileGetByIdProto(StructureStubInfo*, Structure*, Structure* prototypeStructure, const Identifier&, const PropertySlot&, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame);
 275         void privateCompileGetByIdSelfList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, const Identifier&, const PropertySlot&, size_t cachedOffset);
 276         void privateCompileGetByIdProtoList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, Structure* prototypeStructure, const Identifier&, const PropertySlot&, size_t cachedOffset, CallFrame* callFrame);
 277         void privateCompileGetByIdChainList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, StructureChain* chain, size_t count, const Identifier&, const PropertySlot&, size_t cachedOffset, CallFrame* callFrame);
 278         void privateCompileGetByIdChain(StructureStubInfo*, Structure*, StructureChain*, size_t count, const Identifier&, const PropertySlot&, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame);
 279         void privateCompilePutByIdTransition(StructureStubInfo*, Structure*, Structure*, size_t cachedOffset, StructureChain*, ReturnAddressPtr returnAddress, bool direct);
 280
 281         PassRefPtr<ExecutableMemoryHandle> privateCompileCTIMachineTrampolines(JSGlobalData*, TrampolineStructure*);
 282         Label privateCompileCTINativeCall(JSGlobalData*, bool isConstruct = false);
 283         CodeRef privateCompileCTINativeCall(JSGlobalData*, NativeFunction);
 284         void privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress);
 285
 286         void addSlowCase(Jump);
 287         void addSlowCase(JumpList);
 288         void addJump(Jump, int);
 289         void emitJumpSlowToHot(Jump, int);
 290
 291         void compileOpCall(OpcodeID, Instruction* instruction, unsigned callLinkInfoIndex);
 292         void compileOpCallVarargs(Instruction* instruction);
 293         void compileOpCallInitializeCallFrame();
 294         void compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex, OpcodeID opcodeID);
 295         void compileOpCallVarargsSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter);
 296
 297         enum CompileOpStrictEqType { OpStrictEq, OpNStrictEq };
 298         void compileOpStrictEq(Instruction* instruction, CompileOpStrictEqType type);
 299         bool isOperandConstantImmediateDouble(unsigned src);
 300
 301         void emitLoadDouble(unsigned index, FPRegisterID value);
 302         void emitLoadInt32ToDouble(unsigned index, FPRegisterID value);
 303         Jump emitJumpIfNotObject(RegisterID structureReg);
 304
 305         void testPrototype(JSValue, JumpList& failureCases);
 306
 307         void emitWriteBarrier(RegisterID owner, RegisterID scratch, WriteBarrierUseKind);
 308
 309         template<typename ClassType, typename StructureType> void emitAllocateBasicJSObject(StructureType, void* vtable, RegisterID result, RegisterID storagePtr);
 310         template<typename T> void emitAllocateJSFinalObject(T structure, RegisterID result, RegisterID storagePtr);
 311         void emitAllocateJSFunction(FunctionExecutable*, RegisterID scopeChain, RegisterID result, RegisterID storagePtr);
 312
 313         enum ValueProfilingSiteKind { FirstProfilingSite, SubsequentProfilingSite };
 314 #if ENABLE(VALUE_PROFILER)
 315         // This assumes that the value to profile is in regT0 and that regT3 is available for
 316         // scratch.
 317         void emitValueProfilingSite(ValueProfilingSiteKind);
 318 #else
 319         void emitValueProfilingSite(ValueProfilingSiteKind) { }
 320 #endif
 321
 322 #if USE(JSVALUE32_64)
 323         bool getOperandConstantImmediateInt(unsigned op1, unsigned op2, unsigned& op, int32_t& constant);
 324
 325         void emitLoadTag(unsigned index, RegisterID tag);
 326         void emitLoadPayload(unsigned index, RegisterID payload);
 327
 328         void emitLoad(const JSValue& v, RegisterID tag, RegisterID payload);
 329         void emitLoad(unsigned index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
 330         void emitLoad2(unsigned index1, RegisterID tag1, RegisterID payload1, unsigned index2, RegisterID tag2, RegisterID payload2);
 331
 332         void emitStore(unsigned index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
 333         void emitStore(unsigned index, const JSValue constant, RegisterID base = callFrameRegister);
 334         void emitStoreInt32(unsigned index, RegisterID payload, bool indexIsInt32 = false);
 335         void emitStoreInt32(unsigned index, TrustedImm32 payload, bool indexIsInt32 = false);
 336         void emitStoreCell(unsigned index, RegisterID payload, bool indexIsCell = false);
 337         void emitStoreBool(unsigned index, RegisterID payload, bool indexIsBool = false);
 338         void emitStoreDouble(unsigned index, FPRegisterID value);
 339
 340         bool isLabeled(unsigned bytecodeOffset);
 341         void map(unsigned bytecodeOffset, unsigned virtualRegisterIndex, RegisterID tag, RegisterID payload);
 342         void unmap(RegisterID);
 343         void unmap();
 344         bool isMapped(unsigned virtualRegisterIndex);
 345         bool getMappedPayload(unsigned virtualRegisterIndex, RegisterID& payload);
 346         bool getMappedTag(unsigned virtualRegisterIndex, RegisterID& tag);
 347
 348         void emitJumpSlowCaseIfNotJSCell(unsigned virtualRegisterIndex);
 349         void emitJumpSlowCaseIfNotJSCell(unsigned virtualRegisterIndex, RegisterID tag);
 350         void linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator&, unsigned virtualRegisterIndex);
 351
 352         void compileGetByIdHotPath();
 353         void compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, bool isMethodCheck = false);
 354         void compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, Structure* structure, size_t cachedOffset);
 355         void compileGetDirectOffset(JSObject* base, RegisterID resultTag, RegisterID resultPayload, size_t cachedOffset);
 356         void compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, RegisterID offset);
 357         void compilePutDirectOffset(RegisterID base, RegisterID valueTag, RegisterID valuePayload, Structure* structure, size_t cachedOffset);
 358
 359         // Arithmetic opcode helpers
 360         void emitAdd32Constant(unsigned dst, unsigned op, int32_t constant, ResultType opType);
 361         void emitSub32Constant(unsigned dst, unsigned op, int32_t constant, ResultType opType);
 362         void emitBinaryDoubleOp(OpcodeID, unsigned dst, unsigned op1, unsigned op2, OperandTypes, JumpList& notInt32Op1, JumpList& notInt32Op2, bool op1IsInRegisters = true, bool op2IsInRegisters = true);
 363
 364 #if CPU(X86)
 365         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 366         static const int patchOffsetPutByIdStructure = 7;
 367         static const int patchOffsetPutByIdPropertyMapOffset1 = 22;
 368         static const int patchOffsetPutByIdPropertyMapOffset2 = 28;
 369         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 370         static const int patchOffsetGetByIdStructure = 7;
 371         static const int patchOffsetGetByIdBranchToSlowCase = 13;
 372         static const int patchOffsetGetByIdPropertyMapOffset1 = 19;
 373         static const int patchOffsetGetByIdPropertyMapOffset2 = 22;
 374         static const int patchOffsetGetByIdPutResult = 22;
 375 #if ENABLE(OPCODE_SAMPLING)
 376         static const int patchOffsetGetByIdSlowCaseCall = 37;
 377 #else
 378         static const int patchOffsetGetByIdSlowCaseCall = 33;
 379 #endif
 380         static const int patchOffsetOpCallCompareToJump = 6;
 381
 382         static const int patchOffsetMethodCheckProtoObj = 11;
 383         static const int patchOffsetMethodCheckProtoStruct = 18;
 384         static const int patchOffsetMethodCheckPutFunction = 29;
 385 #elif CPU(ARM_TRADITIONAL)
 386         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 387         static const int patchOffsetPutByIdStructure = 4;
 388         static const int patchOffsetPutByIdPropertyMapOffset1 = 20;
 389         static const int patchOffsetPutByIdPropertyMapOffset2 = 28;
 390         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 391         static const int patchOffsetGetByIdStructure = 4;
 392         static const int patchOffsetGetByIdBranchToSlowCase = 16;
 393         static const int patchOffsetGetByIdPropertyMapOffset1 = 20;
 394         static const int patchOffsetGetByIdPropertyMapOffset2 = 28;
 395         static const int patchOffsetGetByIdPutResult = 36;
 396 #if ENABLE(OPCODE_SAMPLING)
 397         #error "OPCODE_SAMPLING is not yet supported"
 398 #else
 399         static const int patchOffsetGetByIdSlowCaseCall = 40;
 400 #endif
 401         static const int patchOffsetOpCallCompareToJump = 12;
 402
 403         static const int patchOffsetMethodCheckProtoObj = 12;
 404         static const int patchOffsetMethodCheckProtoStruct = 20;
 405         static const int patchOffsetMethodCheckPutFunction = 32;
 406
 407         // sequenceOpCall
 408         static const int sequenceOpCallInstructionSpace = 12;
 409         static const int sequenceOpCallConstantSpace = 2;
 410         // sequenceMethodCheck
 411         static const int sequenceMethodCheckInstructionSpace = 40;
 412         static const int sequenceMethodCheckConstantSpace = 6;
 413         // sequenceGetByIdHotPath
 414         static const int sequenceGetByIdHotPathInstructionSpace = 36;
 415         static const int sequenceGetByIdHotPathConstantSpace = 4;
 416         // sequenceGetByIdSlowCase
 417         static const int sequenceGetByIdSlowCaseInstructionSpace = 56;
 418         static const int sequenceGetByIdSlowCaseConstantSpace = 3;
 419         // sequencePutById
 420         static const int sequencePutByIdInstructionSpace = 36;
 421         static const int sequencePutByIdConstantSpace = 4;
 422 #elif CPU(ARM_THUMB2)
 423         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 424         static const int patchOffsetPutByIdStructure = 10;
 425         static const int patchOffsetPutByIdPropertyMapOffset1 = 36;
 426         static const int patchOffsetPutByIdPropertyMapOffset2 = 48;
 427         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 428         static const int patchOffsetGetByIdStructure = 10;
 429         static const int patchOffsetGetByIdBranchToSlowCase = 26;
 430         static const int patchOffsetGetByIdPropertyMapOffset1 = 28;
 431         static const int patchOffsetGetByIdPropertyMapOffset2 = 30;
 432         static const int patchOffsetGetByIdPutResult = 32;
 433 #if ENABLE(OPCODE_SAMPLING)
 434         #error "OPCODE_SAMPLING is not yet supported"
 435 #else
 436         static const int patchOffsetGetByIdSlowCaseCall = 40;
 437 #endif
 438         static const int patchOffsetOpCallCompareToJump = 16;
 439
 440         static const int patchOffsetMethodCheckProtoObj = 24;
 441         static const int patchOffsetMethodCheckProtoStruct = 34;
 442         static const int patchOffsetMethodCheckPutFunction = 58;
 443
 444         // sequenceOpCall
 445         static const int sequenceOpCallInstructionSpace = 12;
 446         static const int sequenceOpCallConstantSpace = 2;
 447         // sequenceMethodCheck
 448         static const int sequenceMethodCheckInstructionSpace = 40;
 449         static const int sequenceMethodCheckConstantSpace = 6;
 450         // sequenceGetByIdHotPath
 451         static const int sequenceGetByIdHotPathInstructionSpace = 36;
 452         static const int sequenceGetByIdHotPathConstantSpace = 4;
 453         // sequenceGetByIdSlowCase
 454         static const int sequenceGetByIdSlowCaseInstructionSpace = 40;
 455         static const int sequenceGetByIdSlowCaseConstantSpace = 2;
 456         // sequencePutById
 457         static const int sequencePutByIdInstructionSpace = 36;
 458         static const int sequencePutByIdConstantSpace = 4;
 459 #elif CPU(MIPS)
 460 #if WTF_MIPS_ISA(1)
 461         static const int patchOffsetPutByIdStructure = 16;
 462         static const int patchOffsetPutByIdPropertyMapOffset1 = 56;
 463         static const int patchOffsetPutByIdPropertyMapOffset2 = 72;
 464         static const int patchOffsetGetByIdStructure = 16;
 465         static const int patchOffsetGetByIdBranchToSlowCase = 48;
 466         static const int patchOffsetGetByIdPropertyMapOffset1 = 56;
 467         static const int patchOffsetGetByIdPropertyMapOffset2 = 76;
 468         static const int patchOffsetGetByIdPutResult = 96;
 469 #if ENABLE(OPCODE_SAMPLING)
 470         #error "OPCODE_SAMPLING is not yet supported"
 471 #else
 472         static const int patchOffsetGetByIdSlowCaseCall = 56;
 473 #endif
 474         static const int patchOffsetOpCallCompareToJump = 32;
 475         static const int patchOffsetMethodCheckProtoObj = 32;
 476         static const int patchOffsetMethodCheckProtoStruct = 56;
 477         static const int patchOffsetMethodCheckPutFunction = 88;
 478 #else // WTF_MIPS_ISA(1)
 479         static const int patchOffsetPutByIdStructure = 12;
 480         static const int patchOffsetPutByIdPropertyMapOffset1 = 48;
 481         static const int patchOffsetPutByIdPropertyMapOffset2 = 64;
 482         static const int patchOffsetGetByIdStructure = 12;
 483         static const int patchOffsetGetByIdBranchToSlowCase = 44;
 484         static const int patchOffsetGetByIdPropertyMapOffset1 = 48;
 485         static const int patchOffsetGetByIdPropertyMapOffset2 = 64;
 486         static const int patchOffsetGetByIdPutResult = 80;
 487 #if ENABLE(OPCODE_SAMPLING)
 488         #error "OPCODE_SAMPLING is not yet supported"
 489 #else
 490         static const int patchOffsetGetByIdSlowCaseCall = 56;
 491 #endif
 492         static const int patchOffsetOpCallCompareToJump = 32;
 493         static const int patchOffsetMethodCheckProtoObj = 32;
 494         static const int patchOffsetMethodCheckProtoStruct = 52;
 495         static const int patchOffsetMethodCheckPutFunction = 84;
 496 #endif
 497 #elif CPU(SH4)
 498        // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 499         static const int patchOffsetGetByIdStructure = 6;
 500         static const int patchOffsetPutByIdPropertyMapOffset = 24;
 501         static const int patchOffsetPutByIdStructure = 6;
 502         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 503         static const int patchOffsetGetByIdBranchToSlowCase = 10;
 504         static const int patchOffsetGetByIdPropertyMapOffset = 24;
 505         static const int patchOffsetGetByIdPutResult = 24;
 506
 507         // sequenceOpCall
 508         static const int sequenceOpCallInstructionSpace = 12;
 509         static const int sequenceOpCallConstantSpace = 2;
 510         // sequenceMethodCheck
 511         static const int sequenceMethodCheckInstructionSpace = 40;
 512         static const int sequenceMethodCheckConstantSpace = 6;
 513         // sequenceGetByIdHotPath
 514         static const int sequenceGetByIdHotPathInstructionSpace = 36;
 515         static const int sequenceGetByIdHotPathConstantSpace = 5;
 516         // sequenceGetByIdSlowCase
 517         static const int sequenceGetByIdSlowCaseInstructionSpace = 30;
 518         static const int sequenceGetByIdSlowCaseConstantSpace = 3;
 519         // sequencePutById
 520         static const int sequencePutByIdInstructionSpace = 36;
 521         static const int sequencePutByIdConstantSpace = 5;
 522
 523         static const int patchOffsetGetByIdPropertyMapOffset1 = 20;
 524         static const int patchOffsetGetByIdPropertyMapOffset2 = 22;
 525
 526         static const int patchOffsetPutByIdPropertyMapOffset1 = 20;
 527         static const int patchOffsetPutByIdPropertyMapOffset2 = 26;
 528
 529 #if ENABLE(OPCODE_SAMPLING)
 530         static const int patchOffsetGetByIdSlowCaseCall = 0; // FIMXE
 531 #else
 532         static const int patchOffsetGetByIdSlowCaseCall = 26;
 533 #endif
 534         static const int patchOffsetOpCallCompareToJump = 4;
 535
 536         static const int patchOffsetMethodCheckProtoObj = 12;
 537         static const int patchOffsetMethodCheckProtoStruct = 20;
 538         static const int patchOffsetMethodCheckPutFunction = 32;
 539 #else
 540 #error "JSVALUE32_64 not supported on this platform."
 541 #endif
 542
 543 #else // USE(JSVALUE32_64)
 544         void emitGetVirtualRegister(int src, RegisterID dst);
 545         void emitGetVirtualRegisters(int src1, RegisterID dst1, int src2, RegisterID dst2);
 546         void emitPutVirtualRegister(unsigned dst, RegisterID from = regT0);
 547         void emitStoreCell(unsigned dst, RegisterID payload, bool /* only used in JSValue32_64 */ = false)
 548         {
 549             emitPutVirtualRegister(dst, payload);
 550         }
 551
 552         int32_t getConstantOperandImmediateInt(unsigned src);
 553
 554         void killLastResultRegister();
 555
 556         Jump emitJumpIfJSCell(RegisterID);
 557         Jump emitJumpIfBothJSCells(RegisterID, RegisterID, RegisterID);
 558         void emitJumpSlowCaseIfJSCell(RegisterID);
 559         Jump emitJumpIfNotJSCell(RegisterID);
 560         void emitJumpSlowCaseIfNotJSCell(RegisterID);
 561         void emitJumpSlowCaseIfNotJSCell(RegisterID, int VReg);
 562 #if USE(JSVALUE32_64)
 563         JIT::Jump emitJumpIfImmediateNumber(RegisterID reg)
 564         {
 565             return emitJumpIfImmediateInteger(reg);
 566         }
 567
 568         JIT::Jump emitJumpIfNotImmediateNumber(RegisterID reg)
 569         {
 570             return emitJumpIfNotImmediateInteger(reg);
 571         }
 572 #endif
 573         Jump emitJumpIfImmediateInteger(RegisterID);
 574         Jump emitJumpIfNotImmediateInteger(RegisterID);
 575         Jump emitJumpIfNotImmediateIntegers(RegisterID, RegisterID, RegisterID);
 576         void emitJumpSlowCaseIfNotImmediateInteger(RegisterID);
 577         void emitJumpSlowCaseIfNotImmediateNumber(RegisterID);
 578         void emitJumpSlowCaseIfNotImmediateIntegers(RegisterID, RegisterID, RegisterID);
 579
 580 #if USE(JSVALUE32_64)
 581         void emitFastArithDeTagImmediate(RegisterID);
 582         Jump emitFastArithDeTagImmediateJumpIfZero(RegisterID);
 583 #endif
 584         void emitFastArithReTagImmediate(RegisterID src, RegisterID dest);
 585         void emitFastArithIntToImmNoCheck(RegisterID src, RegisterID dest);
 586
 587         void emitTagAsBoolImmediate(RegisterID reg);
 588         void compileBinaryArithOp(OpcodeID, unsigned dst, unsigned src1, unsigned src2, OperandTypes opi);
 589 #if USE(JSVALUE64)
 590         void compileBinaryArithOpSlowCase(OpcodeID, Vector<SlowCaseEntry>::iterator&, unsigned dst, unsigned src1, unsigned src2, OperandTypes, bool op1HasImmediateIntFastCase, bool op2HasImmediateIntFastCase);
 591 #else
 592         void compileBinaryArithOpSlowCase(OpcodeID, Vector<SlowCaseEntry>::iterator&, unsigned dst, unsigned src1, unsigned src2, OperandTypes);
 593 #endif
 594
 595         void compileGetByIdHotPath(int baseVReg, Identifier*);
 596         void compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, bool isMethodCheck = false);
 597         void compileGetDirectOffset(RegisterID base, RegisterID result, Structure* structure, size_t cachedOffset);
 598         void compileGetDirectOffset(JSObject* base, RegisterID result, size_t cachedOffset);
 599         void compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID offset, RegisterID scratch);
 600         void compilePutDirectOffset(RegisterID base, RegisterID value, Structure* structure, size_t cachedOffset);
 601
 602 #if CPU(X86_64)
 603         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 604         static const int patchOffsetPutByIdStructure = 10;
 605         static const int patchOffsetPutByIdPropertyMapOffset = 31;
 606         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 607         static const int patchOffsetGetByIdStructure = 10;
 608         static const int patchOffsetGetByIdBranchToSlowCase = 20;
 609         static const int patchOffsetGetByIdPropertyMapOffset = 28;
 610         static const int patchOffsetGetByIdPutResult = 28;
 611 #if ENABLE(OPCODE_SAMPLING)
 612         static const int patchOffsetGetByIdSlowCaseCall = 64;
 613 #else
 614         static const int patchOffsetGetByIdSlowCaseCall = 54;
 615 #endif
 616         static const int patchOffsetOpCallCompareToJump = 9;
 617
 618         static const int patchOffsetMethodCheckProtoObj = 20;
 619         static const int patchOffsetMethodCheckProtoStruct = 30;
 620         static const int patchOffsetMethodCheckPutFunction = 50;
 621 #elif CPU(X86)
 622         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 623         static const int patchOffsetPutByIdStructure = 7;
 624         static const int patchOffsetPutByIdPropertyMapOffset = 22;
 625         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 626         static const int patchOffsetGetByIdStructure = 7;
 627         static const int patchOffsetGetByIdBranchToSlowCase = 13;
 628         static const int patchOffsetGetByIdPropertyMapOffset = 22;
 629         static const int patchOffsetGetByIdPutResult = 22;
 630 #if ENABLE(OPCODE_SAMPLING)
 631         static const int patchOffsetGetByIdSlowCaseCall = 33;
 632 #else
 633         static const int patchOffsetGetByIdSlowCaseCall = 23;
 634 #endif
 635         static const int patchOffsetOpCallCompareToJump = 6;
 636
 637         static const int patchOffsetMethodCheckProtoObj = 11;
 638         static const int patchOffsetMethodCheckProtoStruct = 18;
 639         static const int patchOffsetMethodCheckPutFunction = 29;
 640 #elif CPU(ARM_THUMB2)
 641         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 642         static const int patchOffsetPutByIdStructure = 10;
 643         static const int patchOffsetPutByIdPropertyMapOffset = 46;
 644         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 645         static const int patchOffsetGetByIdStructure = 10;
 646         static const int patchOffsetGetByIdBranchToSlowCase = 26;
 647         static const int patchOffsetGetByIdPropertyMapOffset = 46;
 648         static const int patchOffsetGetByIdPutResult = 50;
 649 #if ENABLE(OPCODE_SAMPLING)
 650         static const int patchOffsetGetByIdSlowCaseCall = 0; // FIMXE
 651 #else
 652         static const int patchOffsetGetByIdSlowCaseCall = 28;
 653 #endif
 654         static const int patchOffsetOpCallCompareToJump = 16;
 655
 656         static const int patchOffsetMethodCheckProtoObj = 24;
 657         static const int patchOffsetMethodCheckProtoStruct = 34;
 658         static const int patchOffsetMethodCheckPutFunction = 58;
 659 #elif CPU(ARM_TRADITIONAL)
 660         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 661         static const int patchOffsetPutByIdStructure = 4;
 662         static const int patchOffsetPutByIdPropertyMapOffset = 20;
 663         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 664         static const int patchOffsetGetByIdStructure = 4;
 665         static const int patchOffsetGetByIdBranchToSlowCase = 16;
 666         static const int patchOffsetGetByIdPropertyMapOffset = 20;
 667         static const int patchOffsetGetByIdPutResult = 28;
 668 #if ENABLE(OPCODE_SAMPLING)
 669         #error "OPCODE_SAMPLING is not yet supported"
 670 #else
 671         static const int patchOffsetGetByIdSlowCaseCall = 28;
 672 #endif
 673         static const int patchOffsetOpCallCompareToJump = 12;
 674
 675         static const int patchOffsetMethodCheckProtoObj = 12;
 676         static const int patchOffsetMethodCheckProtoStruct = 20;
 677         static const int patchOffsetMethodCheckPutFunction = 32;
 678
 679         // sequenceOpCall
 680         static const int sequenceOpCallInstructionSpace = 12;
 681         static const int sequenceOpCallConstantSpace = 2;
 682         // sequenceMethodCheck
 683         static const int sequenceMethodCheckInstructionSpace = 40;
 684         static const int sequenceMethodCheckConstantSpace = 6;
 685         // sequenceGetByIdHotPath
 686         static const int sequenceGetByIdHotPathInstructionSpace = 28;
 687         static const int sequenceGetByIdHotPathConstantSpace = 3;
 688         // sequenceGetByIdSlowCase
 689         static const int sequenceGetByIdSlowCaseInstructionSpace = 32;
 690         static const int sequenceGetByIdSlowCaseConstantSpace = 2;
 691         // sequencePutById
 692         static const int sequencePutByIdInstructionSpace = 28;
 693         static const int sequencePutByIdConstantSpace = 3;
 694 #elif CPU(MIPS)
 695 #if WTF_MIPS_ISA(1)
 696         static const int patchOffsetPutByIdStructure = 16;
 697         static const int patchOffsetPutByIdPropertyMapOffset = 68;
 698         static const int patchOffsetGetByIdStructure = 16;
 699         static const int patchOffsetGetByIdBranchToSlowCase = 48;
 700         static const int patchOffsetGetByIdPropertyMapOffset = 68;
 701         static const int patchOffsetGetByIdPutResult = 88;
 702 #if ENABLE(OPCODE_SAMPLING)
 703         #error "OPCODE_SAMPLING is not yet supported"
 704 #else
 705         static const int patchOffsetGetByIdSlowCaseCall = 40;
 706 #endif
 707         static const int patchOffsetOpCallCompareToJump = 32;
 708         static const int patchOffsetMethodCheckProtoObj = 32;
 709         static const int patchOffsetMethodCheckProtoStruct = 56;
 710         static const int patchOffsetMethodCheckPutFunction = 88;
 711 #else // WTF_MIPS_ISA(1)
 712         static const int patchOffsetPutByIdStructure = 12;
 713         static const int patchOffsetPutByIdPropertyMapOffset = 60;
 714         static const int patchOffsetGetByIdStructure = 12;
 715         static const int patchOffsetGetByIdBranchToSlowCase = 44;
 716         static const int patchOffsetGetByIdPropertyMapOffset = 60;
 717         static const int patchOffsetGetByIdPutResult = 76;
 718 #if ENABLE(OPCODE_SAMPLING)
 719         #error "OPCODE_SAMPLING is not yet supported"
 720 #else
 721         static const int patchOffsetGetByIdSlowCaseCall = 40;
 722 #endif
 723         static const int patchOffsetOpCallCompareToJump = 32;
 724         static const int patchOffsetMethodCheckProtoObj = 32;
 725         static const int patchOffsetMethodCheckProtoStruct = 52;
 726         static const int patchOffsetMethodCheckPutFunction = 84;
 727 #endif
 728 #endif
 729 #endif // USE(JSVALUE32_64)
 730
 731 #if (defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL)
 732 #define BEGIN_UNINTERRUPTED_SEQUENCE(name) do { beginUninterruptedSequence(name ## InstructionSpace, name ## ConstantSpace); } while (false)
 733 #define END_UNINTERRUPTED_SEQUENCE_FOR_PUT(name, dst) do { endUninterruptedSequence(name ## InstructionSpace, name ## ConstantSpace, dst); } while (false)
 734 #define END_UNINTERRUPTED_SEQUENCE(name) END_UNINTERRUPTED_SEQUENCE_FOR_PUT(name, 0)
 735
 736         void beginUninterruptedSequence(int, int);
 737         void endUninterruptedSequence(int, int, int);
 738
 739 #else
 740 #define BEGIN_UNINTERRUPTED_SEQUENCE(name)  do { beginUninterruptedSequence(); } while (false)
 741 #define END_UNINTERRUPTED_SEQUENCE(name)  do { endUninterruptedSequence(); } while (false)
 742 #define END_UNINTERRUPTED_SEQUENCE_FOR_PUT(name, dst) do { endUninterruptedSequence(); } while (false)
 743 #endif
 744
 745         void emit_compareAndJump(OpcodeID, unsigned op1, unsigned op2, unsigned target, RelationalCondition);
 746         void emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, DoubleCondition, int (JIT_STUB *stub)(STUB_ARGS_DECLARATION), bool invert, Vector<SlowCaseEntry>::iterator&);
 747
 748         void emit_op_add(Instruction*);
 749         void emit_op_bitand(Instruction*);
 750         void emit_op_bitnot(Instruction*);
 751         void emit_op_bitor(Instruction*);
 752         void emit_op_bitxor(Instruction*);
 753         void emit_op_call(Instruction*);
 754         void emit_op_call_eval(Instruction*);
 755         void emit_op_call_varargs(Instruction*);
 756         void emit_op_call_put_result(Instruction*);
 757         void emit_op_catch(Instruction*);
 758         void emit_op_construct(Instruction*);
 759         void emit_op_get_callee(Instruction*);
 760         void emit_op_create_this(Instruction*);
 761         void emit_op_convert_this(Instruction*);
 762         void emit_op_create_arguments(Instruction*);
 763         void emit_op_debug(Instruction*);
 764         void emit_op_del_by_id(Instruction*);
 765         void emit_op_div(Instruction*);
 766         void emit_op_end(Instruction*);
 767         void emit_op_enter(Instruction*);
 768         void emit_op_create_activation(Instruction*);
 769         void emit_op_eq(Instruction*);
 770         void emit_op_eq_null(Instruction*);
 771         void emit_op_get_by_id(Instruction*);
 772         void emit_op_get_arguments_length(Instruction*);
 773         void emit_op_get_by_val(Instruction*);
 774         void emit_op_get_argument_by_val(Instruction*);
 775         void emit_op_get_by_pname(Instruction*);
 776         void emit_op_get_global_var(Instruction*);
 777         void emit_op_get_scoped_var(Instruction*);
 778         void emit_op_init_lazy_reg(Instruction*);
 779         void emit_op_check_has_instance(Instruction*);
 780         void emit_op_instanceof(Instruction*);
 781         void emit_op_jeq_null(Instruction*);
 782         void emit_op_jfalse(Instruction*);
 783         void emit_op_jmp(Instruction*);
 784         void emit_op_jmp_scopes(Instruction*);
 785         void emit_op_jneq_null(Instruction*);
 786         void emit_op_jneq_ptr(Instruction*);
 787         void emit_op_jless(Instruction*);
 788         void emit_op_jlesseq(Instruction*);
 789         void emit_op_jgreater(Instruction*);
 790         void emit_op_jgreatereq(Instruction*);
 791         void emit_op_jnless(Instruction*);
 792         void emit_op_jnlesseq(Instruction*);
 793         void emit_op_jngreater(Instruction*);
 794         void emit_op_jngreatereq(Instruction*);
 795         void emit_op_jsr(Instruction*);
 796         void emit_op_jtrue(Instruction*);
 797         void emit_op_load_varargs(Instruction*);
 798         void emit_op_loop(Instruction*);
 799         void emit_op_loop_hint(Instruction*);
 800         void emit_op_loop_if_less(Instruction*);
 801         void emit_op_loop_if_lesseq(Instruction*);
 802         void emit_op_loop_if_greater(Instruction*);
 803         void emit_op_loop_if_greatereq(Instruction*);
 804         void emit_op_loop_if_true(Instruction*);
 805         void emit_op_loop_if_false(Instruction*);
 806         void emit_op_lshift(Instruction*);
 807         void emit_op_method_check(Instruction*);
 808         void emit_op_mod(Instruction*);
 809         void emit_op_mov(Instruction*);
 810         void emit_op_mul(Instruction*);
 811         void emit_op_negate(Instruction*);
 812         void emit_op_neq(Instruction*);
 813         void emit_op_neq_null(Instruction*);
 814         void emit_op_new_array(Instruction*);
 815         void emit_op_new_array_buffer(Instruction*);
 816         void emit_op_new_func(Instruction*);
 817         void emit_op_new_func_exp(Instruction*);
 818         void emit_op_new_object(Instruction*);
 819         void emit_op_new_regexp(Instruction*);
 820         void emit_op_get_pnames(Instruction*);
 821         void emit_op_next_pname(Instruction*);
 822         void emit_op_not(Instruction*);
 823         void emit_op_nstricteq(Instruction*);
 824         void emit_op_pop_scope(Instruction*);
 825         void emit_op_post_dec(Instruction*);
 826         void emit_op_post_inc(Instruction*);
 827         void emit_op_pre_dec(Instruction*);
 828         void emit_op_pre_inc(Instruction*);
 829         void emit_op_profile_did_call(Instruction*);
 830         void emit_op_profile_will_call(Instruction*);
 831         void emit_op_push_new_scope(Instruction*);
 832         void emit_op_push_scope(Instruction*);
 833         void emit_op_put_by_id(Instruction*);
 834         void emit_op_put_by_index(Instruction*);
 835         void emit_op_put_by_val(Instruction*);
 836         void emit_op_put_getter(Instruction*);
 837         void emit_op_put_global_var(Instruction*);
 838         void emit_op_put_scoped_var(Instruction*);
 839         void emit_op_put_setter(Instruction*);
 840         void emit_op_resolve(Instruction*);
 841         void emit_op_resolve_base(Instruction*);
 842         void emit_op_ensure_property_exists(Instruction*);
 843         void emit_op_resolve_global(Instruction*, bool dynamic = false);
 844         void emit_op_resolve_global_dynamic(Instruction*);
 845         void emit_op_resolve_skip(Instruction*);
 846         void emit_op_resolve_with_base(Instruction*);
 847         void emit_op_resolve_with_this(Instruction*);
 848         void emit_op_ret(Instruction*);
 849         void emit_op_ret_object_or_this(Instruction*);
 850         void emit_op_rshift(Instruction*);
 851         void emit_op_sret(Instruction*);
 852         void emit_op_strcat(Instruction*);
 853         void emit_op_stricteq(Instruction*);
 854         void emit_op_sub(Instruction*);
 855         void emit_op_switch_char(Instruction*);
 856         void emit_op_switch_imm(Instruction*);
 857         void emit_op_switch_string(Instruction*);
 858         void emit_op_tear_off_activation(Instruction*);
 859         void emit_op_tear_off_arguments(Instruction*);
 860         void emit_op_throw(Instruction*);
 861         void emit_op_throw_reference_error(Instruction*);
 862         void emit_op_to_jsnumber(Instruction*);
 863         void emit_op_to_primitive(Instruction*);
 864         void emit_op_unexpected_load(Instruction*);
 865         void emit_op_urshift(Instruction*);
 866 #if ENABLE(JIT_USE_SOFT_MODULO)
 867         void softModulo();
 868 #endif
 869
 870         void emitSlow_op_add(Instruction*, Vector<SlowCaseEntry>::iterator&);
 871         void emitSlow_op_bitand(Instruction*, Vector<SlowCaseEntry>::iterator&);
 872         void emitSlow_op_bitnot(Instruction*, Vector<SlowCaseEntry>::iterator&);
 873         void emitSlow_op_bitor(Instruction*, Vector<SlowCaseEntry>::iterator&);
 874         void emitSlow_op_bitxor(Instruction*, Vector<SlowCaseEntry>::iterator&);
 875         void emitSlow_op_call(Instruction*, Vector<SlowCaseEntry>::iterator&);
 876         void emitSlow_op_call_eval(Instruction*, Vector<SlowCaseEntry>::iterator&);
 877         void emitSlow_op_call_varargs(Instruction*, Vector<SlowCaseEntry>::iterator&);
 878         void emitSlow_op_construct(Instruction*, Vector<SlowCaseEntry>::iterator&);
 879         void emitSlow_op_convert_this(Instruction*, Vector<SlowCaseEntry>::iterator&);
 880         void emitSlow_op_create_this(Instruction*, Vector<SlowCaseEntry>::iterator&);
 881         void emitSlow_op_div(Instruction*, Vector<SlowCaseEntry>::iterator&);
 882         void emitSlow_op_eq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 883         void emitSlow_op_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);
 884         void emitSlow_op_get_arguments_length(Instruction*, Vector<SlowCaseEntry>::iterator&);
 885         void emitSlow_op_get_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
 886         void emitSlow_op_get_argument_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
 887         void emitSlow_op_get_by_pname(Instruction*, Vector<SlowCaseEntry>::iterator&);
 888         void emitSlow_op_check_has_instance(Instruction*, Vector<SlowCaseEntry>::iterator&);
 889         void emitSlow_op_instanceof(Instruction*, Vector<SlowCaseEntry>::iterator&);
 890         void emitSlow_op_jfalse(Instruction*, Vector<SlowCaseEntry>::iterator&);
 891         void emitSlow_op_jless(Instruction*, Vector<SlowCaseEntry>::iterator&);
 892         void emitSlow_op_jlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 893         void emitSlow_op_jgreater(Instruction*, Vector<SlowCaseEntry>::iterator&);
 894         void emitSlow_op_jgreatereq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 895         void emitSlow_op_jnless(Instruction*, Vector<SlowCaseEntry>::iterator&);
 896         void emitSlow_op_jnlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 897         void emitSlow_op_jngreater(Instruction*, Vector<SlowCaseEntry>::iterator&);
 898         void emitSlow_op_jngreatereq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 899         void emitSlow_op_jtrue(Instruction*, Vector<SlowCaseEntry>::iterator&);
 900         void emitSlow_op_load_varargs(Instruction*, Vector<SlowCaseEntry>::iterator&);
 901         void emitSlow_op_loop_if_less(Instruction*, Vector<SlowCaseEntry>::iterator&);
 902         void emitSlow_op_loop_if_lesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 903         void emitSlow_op_loop_if_greater(Instruction*, Vector<SlowCaseEntry>::iterator&);
 904         void emitSlow_op_loop_if_greatereq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 905         void emitSlow_op_loop_if_true(Instruction*, Vector<SlowCaseEntry>::iterator&);
 906         void emitSlow_op_loop_if_false(Instruction*, Vector<SlowCaseEntry>::iterator&);
 907         void emitSlow_op_lshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
 908         void emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&);
 909         void emitSlow_op_mod(Instruction*, Vector<SlowCaseEntry>::iterator&);
 910         void emitSlow_op_mul(Instruction*, Vector<SlowCaseEntry>::iterator&);
 911         void emitSlow_op_negate(Instruction*, Vector<SlowCaseEntry>::iterator&);
 912         void emitSlow_op_neq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 913         void emitSlow_op_new_object(Instruction*, Vector<SlowCaseEntry>::iterator&);
 914         void emitSlow_op_not(Instruction*, Vector<SlowCaseEntry>::iterator&);
 915         void emitSlow_op_nstricteq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 916         void emitSlow_op_post_dec(Instruction*, Vector<SlowCaseEntry>::iterator&);
 917         void emitSlow_op_post_inc(Instruction*, Vector<SlowCaseEntry>::iterator&);
 918         void emitSlow_op_pre_dec(Instruction*, Vector<SlowCaseEntry>::iterator&);
 919         void emitSlow_op_pre_inc(Instruction*, Vector<SlowCaseEntry>::iterator&);
 920         void emitSlow_op_put_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);
 921         void emitSlow_op_put_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
 922         void emitSlow_op_resolve_global(Instruction*, Vector<SlowCaseEntry>::iterator&);
 923         void emitSlow_op_resolve_global_dynamic(Instruction*, Vector<SlowCaseEntry>::iterator&);
 924         void emitSlow_op_rshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
 925         void emitSlow_op_stricteq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 926         void emitSlow_op_sub(Instruction*, Vector<SlowCaseEntry>::iterator&);
 927         void emitSlow_op_to_jsnumber(Instruction*, Vector<SlowCaseEntry>::iterator&);
 928         void emitSlow_op_to_primitive(Instruction*, Vector<SlowCaseEntry>::iterator&);
 929         void emitSlow_op_urshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
 930         void emitSlow_op_new_func(Instruction*, Vector<SlowCaseEntry>::iterator&);
 931         void emitSlow_op_new_func_exp(Instruction*, Vector<SlowCaseEntry>::iterator&);
 932
 933
 934         void emitRightShift(Instruction*, bool isUnsigned);
 935         void emitRightShiftSlowCase(Instruction*, Vector<SlowCaseEntry>::iterator&, bool isUnsigned);
 936
 937         /* This function is deprecated. */
 938         void emitGetJITStubArg(unsigned argumentNumber, RegisterID dst);
 939
 940         void emitInitRegister(unsigned dst);
 941
 942         void emitPutToCallFrameHeader(RegisterID from, RegisterFile::CallFrameHeaderEntry entry);
 943         void emitPutCellToCallFrameHeader(RegisterID from, RegisterFile::CallFrameHeaderEntry);
 944         void emitPutIntToCallFrameHeader(RegisterID from, RegisterFile::CallFrameHeaderEntry);
 945         void emitPutImmediateToCallFrameHeader(void* value, RegisterFile::CallFrameHeaderEntry entry);
 946         void emitGetFromCallFrameHeaderPtr(RegisterFile::CallFrameHeaderEntry entry, RegisterID to, RegisterID from = callFrameRegister);
 947         void emitGetFromCallFrameHeader32(RegisterFile::CallFrameHeaderEntry entry, RegisterID to, RegisterID from = callFrameRegister);
 948
 949         JSValue getConstantOperand(unsigned src);
 950         bool isOperandConstantImmediateInt(unsigned src);
 951         bool isOperandConstantImmediateChar(unsigned src);
 952
 953         bool atJumpTarget();
 954
 955         Jump getSlowCase(Vector<SlowCaseEntry>::iterator& iter)
 956         {
 957             return iter++->from;
 958         }
 959         void linkSlowCase(Vector<SlowCaseEntry>::iterator& iter)
 960         {
 961             iter->from.link(this);
 962             ++iter;
 963         }
 964         void linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator&, int vReg);
 965
 966         Jump checkStructure(RegisterID reg, Structure* structure);
 967
 968         void restoreArgumentReference();
 969         void restoreArgumentReferenceForTrampoline();
 970         void updateTopCallFrame();
 971
 972         Call emitNakedCall(CodePtr function = CodePtr());
 973
 974         void preserveReturnAddressAfterCall(RegisterID);
 975         void restoreReturnAddressBeforeReturn(RegisterID);
 976         void restoreReturnAddressBeforeReturn(Address);
 977
 978         // Loads the character value of a single character string into dst.
 979         void emitLoadCharacterString(RegisterID src, RegisterID dst, JumpList& failures);
 980
 981         enum OptimizationCheckKind { LoopOptimizationCheck, RetOptimizationCheck };
 982 #if ENABLE(TIERED_COMPILATION)
 983         void emitOptimizationCheck(OptimizationCheckKind);
 984 #else
 985         void emitOptimizationCheck(OptimizationCheckKind) { }
 986 #endif
 987
 988         void emitTimeoutCheck();
 989 #ifndef NDEBUG
 990         void printBytecodeOperandTypes(unsigned src1, unsigned src2);
 991 #endif
 992
 993 #if ENABLE(SAMPLING_FLAGS)
 994         void setSamplingFlag(int32_t);
 995         void clearSamplingFlag(int32_t);
 996 #endif
 997
 998 #if ENABLE(SAMPLING_COUNTERS)
 999         void emitCount(AbstractSamplingCounter&, uint32_t = 1);
1000 #endif
1001
1002 #if ENABLE(OPCODE_SAMPLING)
1003         void sampleInstruction(Instruction*, bool = false);
1004 #endif
1005
1006 #if ENABLE(CODEBLOCK_SAMPLING)
1007         void sampleCodeBlock(CodeBlock*);
1008 #else
1009         void sampleCodeBlock(CodeBlock*) {}
1010 #endif
1011
1012 #if ENABLE(TIERED_COMPILATION)
1013         bool shouldEmitProfiling() { return m_canBeOptimized; }
1014 #else
1015         // Enables use of value profiler with tiered compilation turned off,
1016         // in which case all code gets profiled.
1017         bool shouldEmitProfiling() { return true; }
1018 #endif
1019
1020         Interpreter* m_interpreter;
1021         JSGlobalData* m_globalData;
1022         CodeBlock* m_codeBlock;
1023
1024         Vector<CallRecord> m_calls;
1025         Vector<Label> m_labels;
1026         Vector<PropertyStubCompilationInfo> m_propertyAccessCompilationInfo;
1027         Vector<StructureStubCompilationInfo> m_callStructureStubCompilationInfo;
1028         Vector<MethodCallCompilationInfo> m_methodCallCompilationInfo;
1029         Vector<JumpTable> m_jmpTable;
1030
1031         unsigned m_bytecodeOffset;
1032         Vector<JSRInfo> m_jsrSites;
1033         Vector<SlowCaseEntry> m_slowCases;
1034         Vector<SwitchRecord> m_switches;
1035
1036         unsigned m_propertyAccessInstructionIndex;
1037         unsigned m_globalResolveInfoIndex;
1038         unsigned m_callLinkInfoIndex;
1039
1040 #if USE(JSVALUE32_64)
1041         unsigned m_jumpTargetIndex;
1042         unsigned m_mappedBytecodeOffset;
1043         unsigned m_mappedVirtualRegisterIndex;
1044         RegisterID m_mappedTag;
1045         RegisterID m_mappedPayload;
1046 #else
1047         int m_lastResultBytecodeRegister;
1048 #endif
1049         unsigned m_jumpTargetsPosition;
1050
1051 #ifndef NDEBUG
1052 #if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL
1053         Label m_uninterruptedInstructionSequenceBegin;
1054         int m_uninterruptedConstantSequenceBegin;
1055 #endif
1056 #endif
1057         WeakRandom m_randomGenerator;
1058         static CodeRef stringGetByValStubGenerator(JSGlobalData*);
1059
1060 #if ENABLE(TIERED_COMPILATION)
1061         bool m_canBeOptimized;
1062         Label m_startOfCode;
1063         CompactJITCodeMap::Encoder m_jitCodeMapEncoder;
1064 #endif
1065     } JIT_CLASS_ALIGNMENT;
1066
1067     inline void JIT::emit_op_loop(Instruction* currentInstruction)
1068     {
1069         emitTimeoutCheck();
1070         emit_op_jmp(currentInstruction);
1071     }
1072
1073     inline void JIT::emit_op_loop_hint(Instruction*)
1074     {
1075         emitOptimizationCheck(LoopOptimizationCheck);
1076     }
1077
1078     inline void JIT::emit_op_loop_if_true(Instruction* currentInstruction)
1079     {
1080         emitTimeoutCheck();
1081         emit_op_jtrue(currentInstruction);
1082     }
1083
1084     inline void JIT::emitSlow_op_loop_if_true(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1085     {
1086         emitSlow_op_jtrue(currentInstruction, iter);
1087     }
1088
1089     inline void JIT::emit_op_loop_if_false(Instruction* currentInstruction)
1090     {
1091         emitTimeoutCheck();
1092         emit_op_jfalse(currentInstruction);
1093     }
1094
1095     inline void JIT::emitSlow_op_loop_if_false(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1096     {
1097         emitSlow_op_jfalse(currentInstruction, iter);
1098     }
1099
1100     inline void JIT::emit_op_loop_if_less(Instruction* currentInstruction)
1101     {
1102         emitTimeoutCheck();
1103         emit_op_jless(currentInstruction);
1104     }
1105
1106     inline void JIT::emitSlow_op_loop_if_less(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1107     {
1108         emitSlow_op_jless(currentInstruction, iter);
1109     }
1110
1111     inline void JIT::emit_op_loop_if_lesseq(Instruction* currentInstruction)
1112     {
1113         emitTimeoutCheck();
1114         emit_op_jlesseq(currentInstruction);
1115     }
1116
1117     inline void JIT::emitSlow_op_loop_if_lesseq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1118     {
1119         emitSlow_op_jlesseq(currentInstruction, iter);
1120     }
1121
1122     inline void JIT::emit_op_loop_if_greater(Instruction* currentInstruction)
1123     {
1124         emitTimeoutCheck();
1125         emit_op_jgreater(currentInstruction);
1126     }
1127
1128     inline void JIT::emitSlow_op_loop_if_greater(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1129     {
1130         emitSlow_op_jgreater(currentInstruction, iter);
1131     }
1132
1133     inline void JIT::emit_op_loop_if_greatereq(Instruction* currentInstruction)
1134     {
1135         emitTimeoutCheck();
1136         emit_op_jgreatereq(currentInstruction);
1137     }
1138
1139     inline void JIT::emitSlow_op_loop_if_greatereq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1140     {
1141         emitSlow_op_jgreatereq(currentInstruction, iter);
1142     }
1143
1144 } // namespace JSC
1145
1146 #endif // ENABLE(JIT)
1147
1148 #endif // JIT_h