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 of code generation
  32 #define ENABLE_JIT_VERBOSE 0
  33 // Verbose logging for OSR-related code.
  34 #define ENABLE_JIT_VERBOSE_OSR 0
  35
  36 // We've run into some problems where changing the size of the class JIT leads to
  37 // performance fluctuations.  Try forcing alignment in an attempt to stabalize this.
  38 #if COMPILER(GCC)
  39 #define JIT_CLASS_ALIGNMENT __attribute__ ((aligned (32)))
  40 #else
  41 #define JIT_CLASS_ALIGNMENT
  42 #endif
  43
  44 #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));
  45 #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));
  46
  47 #include "CodeBlock.h"
  48 #include "CompactJITCodeMap.h"
  49 #include "Interpreter.h"
  50 #include "JSInterfaceJIT.h"
  51 #include "Opcode.h"
  52 #include "Profiler.h"
  53 #include <bytecode/SamplingTool.h>
  54
  55 namespace JSC {
  56
  57     class CodeBlock;
  58     class FunctionExecutable;
  59     class JIT;
  60     class JSPropertyNameIterator;
  61     class Interpreter;
  62     class Register;
  63     class RegisterFile;
  64     class ScopeChainNode;
  65     class StructureChain;
  66
  67     struct CallLinkInfo;
  68     struct Instruction;
  69     struct OperandTypes;
  70     struct PolymorphicAccessStructureList;
  71     struct SimpleJumpTable;
  72     struct StringJumpTable;
  73     struct StructureStubInfo;
  74
  75     struct CallRecord {
  76         MacroAssembler::Call from;
  77         unsigned bytecodeOffset;
  78         void* to;
  79
  80         CallRecord()
  81         {
  82         }
  83
  84         CallRecord(MacroAssembler::Call from, unsigned bytecodeOffset, void* to = 0)
  85             : from(from)
  86             , bytecodeOffset(bytecodeOffset)
  87             , to(to)
  88         {
  89         }
  90     };
  91
  92     struct JumpTable {
  93         MacroAssembler::Jump from;
  94         unsigned toBytecodeOffset;
  95
  96         JumpTable(MacroAssembler::Jump f, unsigned t)
  97             : from(f)
  98             , toBytecodeOffset(t)
  99         {
 100         }
 101     };
 102
 103     struct SlowCaseEntry {
 104         MacroAssembler::Jump from;
 105         unsigned to;
 106         unsigned hint;
 107
 108         SlowCaseEntry(MacroAssembler::Jump f, unsigned t, unsigned h = 0)
 109             : from(f)
 110             , to(t)
 111             , hint(h)
 112         {
 113         }
 114     };
 115
 116     struct SwitchRecord {
 117         enum Type {
 118             Immediate,
 119             Character,
 120             String
 121         };
 122
 123         Type type;
 124
 125         union {
 126             SimpleJumpTable* simpleJumpTable;
 127             StringJumpTable* stringJumpTable;
 128         } jumpTable;
 129
 130         unsigned bytecodeOffset;
 131         unsigned defaultOffset;
 132
 133         SwitchRecord(SimpleJumpTable* jumpTable, unsigned bytecodeOffset, unsigned defaultOffset, Type type)
 134             : type(type)
 135             , bytecodeOffset(bytecodeOffset)
 136             , defaultOffset(defaultOffset)
 137         {
 138             this->jumpTable.simpleJumpTable = jumpTable;
 139         }
 140
 141         SwitchRecord(StringJumpTable* jumpTable, unsigned bytecodeOffset, unsigned defaultOffset)
 142             : type(String)
 143             , bytecodeOffset(bytecodeOffset)
 144             , defaultOffset(defaultOffset)
 145         {
 146             this->jumpTable.stringJumpTable = jumpTable;
 147         }
 148     };
 149
 150     struct PropertyStubCompilationInfo {
 151         unsigned bytecodeIndex;
 152         MacroAssembler::Call callReturnLocation;
 153         MacroAssembler::Label hotPathBegin;
 154
 155 #if !ASSERT_DISABLED
 156         PropertyStubCompilationInfo()
 157             : bytecodeIndex(std::numeric_limits<unsigned>::max())
 158         {
 159         }
 160 #endif
 161     };
 162
 163     struct StructureStubCompilationInfo {
 164         MacroAssembler::DataLabelPtr hotPathBegin;
 165         MacroAssembler::Call hotPathOther;
 166         MacroAssembler::Call callReturnLocation;
 167         bool isCall;
 168         unsigned bytecodeIndex;
 169     };
 170
 171     struct MethodCallCompilationInfo {
 172         MethodCallCompilationInfo(unsigned bytecodeIndex, unsigned propertyAccessIndex)
 173             : bytecodeIndex(bytecodeIndex)
 174             , propertyAccessIndex(propertyAccessIndex)
 175         {
 176         }
 177
 178         unsigned bytecodeIndex;
 179         MacroAssembler::DataLabelPtr structureToCompare;
 180         unsigned propertyAccessIndex;
 181     };
 182
 183     // Near calls can only be patched to other JIT code, regular calls can be patched to JIT code or relinked to stub functions.
 184     void ctiPatchNearCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, MacroAssemblerCodePtr newCalleeFunction);
 185     void ctiPatchCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, MacroAssemblerCodePtr newCalleeFunction);
 186     void ctiPatchCallByReturnAddress(CodeBlock* codeblock, ReturnAddressPtr returnAddress, FunctionPtr newCalleeFunction);
 187
 188     class JIT : private JSInterfaceJIT {
 189         friend class JITStubCall;
 190
 191         using MacroAssembler::Jump;
 192         using MacroAssembler::JumpList;
 193         using MacroAssembler::Label;
 194
 195         static const int patchGetByIdDefaultStructure = -1;
 196         static const int patchGetByIdDefaultOffset = 0;
 197         // Magic number - initial offset cannot be representable as a signed 8bit value, or the X86Assembler
 198         // will compress the displacement, and we may not be able to fit a patched offset.
 199         static const int patchPutByIdDefaultOffset = 256;
 200
 201     public:
 202         static JITCode compile(JSGlobalData* globalData, CodeBlock* codeBlock, CodePtr* functionEntryArityCheck = 0)
 203         {
 204             return JIT(globalData, codeBlock).privateCompile(functionEntryArityCheck);
 205         }
 206
 207         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)
 208         {
 209             JIT jit(globalData, codeBlock);
 210             jit.privateCompileGetByIdProto(stubInfo, structure, prototypeStructure, ident, slot, cachedOffset, returnAddress, callFrame);
 211         }
 212
 213         static void compileGetByIdSelfList(JSGlobalData* globalData, CodeBlock* codeBlock, StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset)
 214         {
 215             JIT jit(globalData, codeBlock);
 216             jit.privateCompileGetByIdSelfList(stubInfo, polymorphicStructures, currentIndex, structure, ident, slot, cachedOffset);
 217         }
 218         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)
 219         {
 220             JIT jit(globalData, codeBlock);
 221             jit.privateCompileGetByIdProtoList(stubInfo, prototypeStructureList, currentIndex, structure, prototypeStructure, ident, slot, cachedOffset, callFrame);
 222         }
 223         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)
 224         {
 225             JIT jit(globalData, codeBlock);
 226             jit.privateCompileGetByIdChainList(stubInfo, prototypeStructureList, currentIndex, structure, chain, count, ident, slot, cachedOffset, callFrame);
 227         }
 228
 229         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)
 230         {
 231             JIT jit(globalData, codeBlock);
 232             jit.privateCompileGetByIdChain(stubInfo, structure, chain, count, ident, slot, cachedOffset, returnAddress, callFrame);
 233         }
 234
 235         static void compilePutByIdTransition(JSGlobalData* globalData, CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress, bool direct)
 236         {
 237             JIT jit(globalData, codeBlock);
 238             jit.privateCompilePutByIdTransition(stubInfo, oldStructure, newStructure, cachedOffset, chain, returnAddress, direct);
 239         }
 240
 241         static PassRefPtr<ExecutableMemoryHandle> compileCTIMachineTrampolines(JSGlobalData* globalData, TrampolineStructure *trampolines)
 242         {
 243             if (!globalData->canUseJIT())
 244                 return 0;
 245             JIT jit(globalData, 0);
 246             return jit.privateCompileCTIMachineTrampolines(globalData, trampolines);
 247         }
 248
 249         static CodeRef compileCTINativeCall(JSGlobalData* globalData, NativeFunction func)
 250         {
 251             if (!globalData->canUseJIT())
 252                 return CodeRef();
 253             JIT jit(globalData, 0);
 254             return jit.privateCompileCTINativeCall(globalData, func);
 255         }
 256
 257         static void patchGetByIdSelf(CodeBlock* codeblock, StructureStubInfo*, Structure*, size_t cachedOffset, ReturnAddressPtr returnAddress);
 258         static void patchPutByIdReplace(CodeBlock* codeblock, StructureStubInfo*, Structure*, size_t cachedOffset, ReturnAddressPtr returnAddress, bool direct);
 259         static void patchMethodCallProto(JSGlobalData&, CodeBlock* codeblock, MethodCallLinkInfo&, JSObject*, Structure*, JSObject*, ReturnAddressPtr);
 260
 261         static void compilePatchGetArrayLength(JSGlobalData* globalData, CodeBlock* codeBlock, ReturnAddressPtr returnAddress)
 262         {
 263             JIT jit(globalData, codeBlock);
 264             return jit.privateCompilePatchGetArrayLength(returnAddress);
 265         }
 266
 267         static void linkFor(JSFunction* callee, CodeBlock* callerCodeBlock, CodeBlock* calleeCodeBlock, CodePtr, CallLinkInfo*, int callerArgCount, JSGlobalData*, CodeSpecializationKind);
 268
 269     private:
 270         struct JSRInfo {
 271             DataLabelPtr storeLocation;
 272             Label target;
 273
 274             JSRInfo(DataLabelPtr storeLocation, Label targetLocation)
 275                 : storeLocation(storeLocation)
 276                 , target(targetLocation)
 277             {
 278             }
 279         };
 280
 281         JIT(JSGlobalData*, CodeBlock* = 0);
 282
 283         void privateCompileMainPass();
 284         void privateCompileLinkPass();
 285         void privateCompileSlowCases();
 286         JITCode privateCompile(CodePtr* functionEntryArityCheck);
 287         void privateCompileGetByIdProto(StructureStubInfo*, Structure*, Structure* prototypeStructure, const Identifier&, const PropertySlot&, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame);
 288         void privateCompileGetByIdSelfList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, const Identifier&, const PropertySlot&, size_t cachedOffset);
 289         void privateCompileGetByIdProtoList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, Structure* prototypeStructure, const Identifier&, const PropertySlot&, size_t cachedOffset, CallFrame* callFrame);
 290         void privateCompileGetByIdChainList(StructureStubInfo*, PolymorphicAccessStructureList*, int, Structure*, StructureChain* chain, size_t count, const Identifier&, const PropertySlot&, size_t cachedOffset, CallFrame* callFrame);
 291         void privateCompileGetByIdChain(StructureStubInfo*, Structure*, StructureChain*, size_t count, const Identifier&, const PropertySlot&, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame);
 292         void privateCompilePutByIdTransition(StructureStubInfo*, Structure*, Structure*, size_t cachedOffset, StructureChain*, ReturnAddressPtr returnAddress, bool direct);
 293
 294         PassRefPtr<ExecutableMemoryHandle> privateCompileCTIMachineTrampolines(JSGlobalData*, TrampolineStructure*);
 295         Label privateCompileCTINativeCall(JSGlobalData*, bool isConstruct = false);
 296         CodeRef privateCompileCTINativeCall(JSGlobalData*, NativeFunction);
 297         void privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress);
 298
 299         void addSlowCase(Jump);
 300         void addSlowCase(JumpList);
 301         void addSlowCase();
 302         void addJump(Jump, int);
 303         void emitJumpSlowToHot(Jump, int);
 304
 305         void compileOpCall(OpcodeID, Instruction* instruction, unsigned callLinkInfoIndex);
 306         void compileOpCallVarargs(Instruction* instruction);
 307         void compileOpCallInitializeCallFrame();
 308         void compileOpCallSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex, OpcodeID opcodeID);
 309         void compileOpCallVarargsSlowCase(Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter);
 310
 311         enum CompileOpStrictEqType { OpStrictEq, OpNStrictEq };
 312         void compileOpStrictEq(Instruction* instruction, CompileOpStrictEqType type);
 313         bool isOperandConstantImmediateDouble(unsigned src);
 314
 315         void emitLoadDouble(unsigned index, FPRegisterID value);
 316         void emitLoadInt32ToDouble(unsigned index, FPRegisterID value);
 317         Jump emitJumpIfNotObject(RegisterID structureReg);
 318         Jump emitJumpIfNotType(RegisterID baseReg, RegisterID scratchReg, JSType);
 319
 320         void testPrototype(JSValue, JumpList& failureCases);
 321
 322         enum WriteBarrierMode { UnconditionalWriteBarrier, ShouldFilterImmediates };
 323         // value register in write barrier is used before any scratch registers
 324         // so may safely be the same as either of the scratch registers.
 325         void emitWriteBarrier(RegisterID owner, RegisterID valueTag, RegisterID scratch, RegisterID scratch2, WriteBarrierMode, WriteBarrierUseKind);
 326         void emitWriteBarrier(JSCell* owner, RegisterID value, RegisterID scratch, WriteBarrierMode, WriteBarrierUseKind);
 327
 328         template<typename ClassType, typename StructureType> void emitAllocateBasicJSObject(StructureType, void* vtable, RegisterID result, RegisterID storagePtr);
 329         template<typename T> void emitAllocateJSFinalObject(T structure, RegisterID result, RegisterID storagePtr);
 330         void emitAllocateJSFunction(FunctionExecutable*, RegisterID scopeChain, RegisterID result, RegisterID storagePtr);
 331
 332         enum ValueProfilingSiteKind { FirstProfilingSite, SubsequentProfilingSite };
 333 #if ENABLE(VALUE_PROFILER)
 334         // This assumes that the value to profile is in regT0 and that regT3 is available for
 335         // scratch.
 336         void emitValueProfilingSite(ValueProfilingSiteKind);
 337 #else
 338         void emitValueProfilingSite(ValueProfilingSiteKind) { }
 339 #endif
 340
 341 #if USE(JSVALUE32_64)
 342         bool getOperandConstantImmediateInt(unsigned op1, unsigned op2, unsigned& op, int32_t& constant);
 343
 344         void emitLoadTag(unsigned index, RegisterID tag);
 345         void emitLoadPayload(unsigned index, RegisterID payload);
 346
 347         void emitLoad(const JSValue& v, RegisterID tag, RegisterID payload);
 348         void emitLoad(unsigned index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
 349         void emitLoad2(unsigned index1, RegisterID tag1, RegisterID payload1, unsigned index2, RegisterID tag2, RegisterID payload2);
 350
 351         void emitStore(unsigned index, RegisterID tag, RegisterID payload, RegisterID base = callFrameRegister);
 352         void emitStore(unsigned index, const JSValue constant, RegisterID base = callFrameRegister);
 353         void emitStoreInt32(unsigned index, RegisterID payload, bool indexIsInt32 = false);
 354         void emitStoreInt32(unsigned index, TrustedImm32 payload, bool indexIsInt32 = false);
 355         void emitStoreAndMapInt32(unsigned index, RegisterID tag, RegisterID payload, bool indexIsInt32, size_t opcodeLength);
 356         void emitStoreCell(unsigned index, RegisterID payload, bool indexIsCell = false);
 357         void emitStoreBool(unsigned index, RegisterID payload, bool indexIsBool = false);
 358         void emitStoreDouble(unsigned index, FPRegisterID value);
 359
 360         bool isLabeled(unsigned bytecodeOffset);
 361         void map(unsigned bytecodeOffset, unsigned virtualRegisterIndex, RegisterID tag, RegisterID payload);
 362         void unmap(RegisterID);
 363         void unmap();
 364         bool isMapped(unsigned virtualRegisterIndex);
 365         bool getMappedPayload(unsigned virtualRegisterIndex, RegisterID& payload);
 366         bool getMappedTag(unsigned virtualRegisterIndex, RegisterID& tag);
 367
 368         void emitJumpSlowCaseIfNotJSCell(unsigned virtualRegisterIndex);
 369         void emitJumpSlowCaseIfNotJSCell(unsigned virtualRegisterIndex, RegisterID tag);
 370         void linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator&, unsigned virtualRegisterIndex);
 371
 372         void compileGetByIdHotPath();
 373         void compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, bool isMethodCheck = false);
 374         void compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, size_t cachedOffset);
 375         void compileGetDirectOffset(JSObject* base, RegisterID resultTag, RegisterID resultPayload, size_t cachedOffset);
 376         void compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, RegisterID offset);
 377         void compilePutDirectOffset(RegisterID base, RegisterID valueTag, RegisterID valuePayload, size_t cachedOffset);
 378
 379         // Arithmetic opcode helpers
 380         void emitAdd32Constant(unsigned dst, unsigned op, int32_t constant, ResultType opType);
 381         void emitSub32Constant(unsigned dst, unsigned op, int32_t constant, ResultType opType);
 382         void emitBinaryDoubleOp(OpcodeID, unsigned dst, unsigned op1, unsigned op2, OperandTypes, JumpList& notInt32Op1, JumpList& notInt32Op2, bool op1IsInRegisters = true, bool op2IsInRegisters = true);
 383
 384 #if CPU(X86)
 385         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 386         static const int patchOffsetPutByIdStructure = 7;
 387         static const int patchOffsetPutByIdPropertyMapOffset1 = 22;
 388         static const int patchOffsetPutByIdPropertyMapOffset2 = 28;
 389         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 390         static const int patchOffsetGetByIdStructure = 7;
 391         static const int patchOffsetGetByIdBranchToSlowCase = 13;
 392         static const int patchOffsetGetByIdPropertyMapOffset1 = 19;
 393         static const int patchOffsetGetByIdPropertyMapOffset2 = 22;
 394         static const int patchOffsetGetByIdPutResult = 22;
 395 #if ENABLE(OPCODE_SAMPLING)
 396         static const int patchOffsetGetByIdSlowCaseCall = 37;
 397 #else
 398         static const int patchOffsetGetByIdSlowCaseCall = 33;
 399 #endif
 400         static const int patchOffsetOpCallCompareToJump = 6;
 401
 402         static const int patchOffsetMethodCheckProtoObj = 11;
 403         static const int patchOffsetMethodCheckProtoStruct = 18;
 404         static const int patchOffsetMethodCheckPutFunction = 29;
 405 #elif CPU(ARM_TRADITIONAL)
 406         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 407         static const int patchOffsetPutByIdStructure = 4;
 408         static const int patchOffsetPutByIdPropertyMapOffset1 = 20;
 409         static const int patchOffsetPutByIdPropertyMapOffset2 = 28;
 410         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 411         static const int patchOffsetGetByIdStructure = 4;
 412         static const int patchOffsetGetByIdBranchToSlowCase = 16;
 413         static const int patchOffsetGetByIdPropertyMapOffset1 = 20;
 414         static const int patchOffsetGetByIdPropertyMapOffset2 = 28;
 415         static const int patchOffsetGetByIdPutResult = 36;
 416 #if ENABLE(OPCODE_SAMPLING)
 417         #error "OPCODE_SAMPLING is not yet supported"
 418 #else
 419         static const int patchOffsetGetByIdSlowCaseCall = 40;
 420 #endif
 421         static const int patchOffsetOpCallCompareToJump = 12;
 422
 423         static const int patchOffsetMethodCheckProtoObj = 12;
 424         static const int patchOffsetMethodCheckProtoStruct = 20;
 425         static const int patchOffsetMethodCheckPutFunction = 32;
 426
 427         // sequenceOpCall
 428         static const int sequenceOpCallInstructionSpace = 12;
 429         static const int sequenceOpCallConstantSpace = 2;
 430         // sequenceMethodCheck
 431         static const int sequenceMethodCheckInstructionSpace = 40;
 432         static const int sequenceMethodCheckConstantSpace = 6;
 433         // sequenceGetByIdHotPath
 434         static const int sequenceGetByIdHotPathInstructionSpace = 36;
 435         static const int sequenceGetByIdHotPathConstantSpace = 4;
 436         // sequenceGetByIdSlowCase
 437         static const int sequenceGetByIdSlowCaseInstructionSpace = 56;
 438         static const int sequenceGetByIdSlowCaseConstantSpace = 3;
 439         // sequencePutById
 440         static const int sequencePutByIdInstructionSpace = 36;
 441         static const int sequencePutByIdConstantSpace = 4;
 442 #elif CPU(ARM_THUMB2)
 443         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 444         static const int patchOffsetPutByIdStructure = 10;
 445         static const int patchOffsetPutByIdPropertyMapOffset1 = 36;
 446         static const int patchOffsetPutByIdPropertyMapOffset2 = 48;
 447         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 448         static const int patchOffsetGetByIdStructure = 10;
 449         static const int patchOffsetGetByIdBranchToSlowCase = 26;
 450         static const int patchOffsetGetByIdPropertyMapOffset1 = 28;
 451         static const int patchOffsetGetByIdPropertyMapOffset2 = 30;
 452         static const int patchOffsetGetByIdPutResult = 32;
 453 #if ENABLE(OPCODE_SAMPLING)
 454         #error "OPCODE_SAMPLING is not yet supported"
 455 #else
 456         static const int patchOffsetGetByIdSlowCaseCall = 40;
 457 #endif
 458         static const int patchOffsetOpCallCompareToJump = 16;
 459
 460         static const int patchOffsetMethodCheckProtoObj = 24;
 461         static const int patchOffsetMethodCheckProtoStruct = 34;
 462         static const int patchOffsetMethodCheckPutFunction = 58;
 463
 464         // sequenceOpCall
 465         static const int sequenceOpCallInstructionSpace = 12;
 466         static const int sequenceOpCallConstantSpace = 2;
 467         // sequenceMethodCheck
 468         static const int sequenceMethodCheckInstructionSpace = 40;
 469         static const int sequenceMethodCheckConstantSpace = 6;
 470         // sequenceGetByIdHotPath
 471         static const int sequenceGetByIdHotPathInstructionSpace = 36;
 472         static const int sequenceGetByIdHotPathConstantSpace = 4;
 473         // sequenceGetByIdSlowCase
 474         static const int sequenceGetByIdSlowCaseInstructionSpace = 40;
 475         static const int sequenceGetByIdSlowCaseConstantSpace = 2;
 476         // sequencePutById
 477         static const int sequencePutByIdInstructionSpace = 36;
 478         static const int sequencePutByIdConstantSpace = 4;
 479 #elif CPU(MIPS)
 480 #if WTF_MIPS_ISA(1)
 481         static const int patchOffsetPutByIdStructure = 16;
 482         static const int patchOffsetPutByIdPropertyMapOffset1 = 56;
 483         static const int patchOffsetPutByIdPropertyMapOffset2 = 72;
 484         static const int patchOffsetGetByIdStructure = 16;
 485         static const int patchOffsetGetByIdBranchToSlowCase = 48;
 486         static const int patchOffsetGetByIdPropertyMapOffset1 = 56;
 487         static const int patchOffsetGetByIdPropertyMapOffset2 = 76;
 488         static const int patchOffsetGetByIdPutResult = 96;
 489 #if ENABLE(OPCODE_SAMPLING)
 490         #error "OPCODE_SAMPLING is not yet supported"
 491 #else
 492         static const int patchOffsetGetByIdSlowCaseCall = 56;
 493 #endif
 494         static const int patchOffsetOpCallCompareToJump = 32;
 495         static const int patchOffsetMethodCheckProtoObj = 32;
 496         static const int patchOffsetMethodCheckProtoStruct = 56;
 497         static const int patchOffsetMethodCheckPutFunction = 88;
 498 #else // WTF_MIPS_ISA(1)
 499         static const int patchOffsetPutByIdStructure = 12;
 500         static const int patchOffsetPutByIdPropertyMapOffset1 = 48;
 501         static const int patchOffsetPutByIdPropertyMapOffset2 = 64;
 502         static const int patchOffsetGetByIdStructure = 12;
 503         static const int patchOffsetGetByIdBranchToSlowCase = 44;
 504         static const int patchOffsetGetByIdPropertyMapOffset1 = 48;
 505         static const int patchOffsetGetByIdPropertyMapOffset2 = 64;
 506         static const int patchOffsetGetByIdPutResult = 80;
 507 #if ENABLE(OPCODE_SAMPLING)
 508         #error "OPCODE_SAMPLING is not yet supported"
 509 #else
 510         static const int patchOffsetGetByIdSlowCaseCall = 56;
 511 #endif
 512         static const int patchOffsetOpCallCompareToJump = 32;
 513         static const int patchOffsetMethodCheckProtoObj = 32;
 514         static const int patchOffsetMethodCheckProtoStruct = 52;
 515         static const int patchOffsetMethodCheckPutFunction = 84;
 516 #endif
 517 #elif CPU(SH4)
 518        // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 519         static const int patchOffsetGetByIdStructure = 6;
 520         static const int patchOffsetPutByIdPropertyMapOffset = 24;
 521         static const int patchOffsetPutByIdStructure = 6;
 522         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 523         static const int patchOffsetGetByIdBranchToSlowCase = 10;
 524         static const int patchOffsetGetByIdPropertyMapOffset = 24;
 525         static const int patchOffsetGetByIdPutResult = 24;
 526
 527         // sequenceOpCall
 528         static const int sequenceOpCallInstructionSpace = 12;
 529         static const int sequenceOpCallConstantSpace = 2;
 530         // sequenceMethodCheck
 531         static const int sequenceMethodCheckInstructionSpace = 40;
 532         static const int sequenceMethodCheckConstantSpace = 6;
 533         // sequenceGetByIdHotPath
 534         static const int sequenceGetByIdHotPathInstructionSpace = 36;
 535         static const int sequenceGetByIdHotPathConstantSpace = 5;
 536         // sequenceGetByIdSlowCase
 537         static const int sequenceGetByIdSlowCaseInstructionSpace = 30;
 538         static const int sequenceGetByIdSlowCaseConstantSpace = 3;
 539         // sequencePutById
 540         static const int sequencePutByIdInstructionSpace = 36;
 541         static const int sequencePutByIdConstantSpace = 5;
 542
 543         static const int patchOffsetGetByIdPropertyMapOffset1 = 20;
 544         static const int patchOffsetGetByIdPropertyMapOffset2 = 22;
 545
 546         static const int patchOffsetPutByIdPropertyMapOffset1 = 20;
 547         static const int patchOffsetPutByIdPropertyMapOffset2 = 26;
 548
 549 #if ENABLE(OPCODE_SAMPLING)
 550         static const int patchOffsetGetByIdSlowCaseCall = 0; // FIMXE
 551 #else
 552         static const int patchOffsetGetByIdSlowCaseCall = 26;
 553 #endif
 554         static const int patchOffsetOpCallCompareToJump = 4;
 555
 556         static const int patchOffsetMethodCheckProtoObj = 12;
 557         static const int patchOffsetMethodCheckProtoStruct = 20;
 558         static const int patchOffsetMethodCheckPutFunction = 32;
 559 #else
 560 #error "JSVALUE32_64 not supported on this platform."
 561 #endif
 562
 563 #else // USE(JSVALUE32_64)
 564         void emitGetVirtualRegister(int src, RegisterID dst);
 565         void emitGetVirtualRegisters(int src1, RegisterID dst1, int src2, RegisterID dst2);
 566         void emitPutVirtualRegister(unsigned dst, RegisterID from = regT0);
 567         void emitStoreCell(unsigned dst, RegisterID payload, bool /* only used in JSValue32_64 */ = false)
 568         {
 569             emitPutVirtualRegister(dst, payload);
 570         }
 571
 572         int32_t getConstantOperandImmediateInt(unsigned src);
 573
 574         void killLastResultRegister();
 575
 576         Jump emitJumpIfJSCell(RegisterID);
 577         Jump emitJumpIfBothJSCells(RegisterID, RegisterID, RegisterID);
 578         void emitJumpSlowCaseIfJSCell(RegisterID);
 579         Jump emitJumpIfNotJSCell(RegisterID);
 580         void emitJumpSlowCaseIfNotJSCell(RegisterID);
 581         void emitJumpSlowCaseIfNotJSCell(RegisterID, int VReg);
 582 #if USE(JSVALUE32_64)
 583         JIT::Jump emitJumpIfImmediateNumber(RegisterID reg)
 584         {
 585             return emitJumpIfImmediateInteger(reg);
 586         }
 587
 588         JIT::Jump emitJumpIfNotImmediateNumber(RegisterID reg)
 589         {
 590             return emitJumpIfNotImmediateInteger(reg);
 591         }
 592 #endif
 593         Jump emitJumpIfImmediateInteger(RegisterID);
 594         Jump emitJumpIfNotImmediateInteger(RegisterID);
 595         Jump emitJumpIfNotImmediateIntegers(RegisterID, RegisterID, RegisterID);
 596         void emitJumpSlowCaseIfNotImmediateInteger(RegisterID);
 597         void emitJumpSlowCaseIfNotImmediateNumber(RegisterID);
 598         void emitJumpSlowCaseIfNotImmediateIntegers(RegisterID, RegisterID, RegisterID);
 599
 600 #if USE(JSVALUE32_64)
 601         void emitFastArithDeTagImmediate(RegisterID);
 602         Jump emitFastArithDeTagImmediateJumpIfZero(RegisterID);
 603 #endif
 604         void emitFastArithReTagImmediate(RegisterID src, RegisterID dest);
 605         void emitFastArithIntToImmNoCheck(RegisterID src, RegisterID dest);
 606
 607         void emitTagAsBoolImmediate(RegisterID reg);
 608         void compileBinaryArithOp(OpcodeID, unsigned dst, unsigned src1, unsigned src2, OperandTypes opi);
 609 #if USE(JSVALUE64)
 610         void compileBinaryArithOpSlowCase(OpcodeID, Vector<SlowCaseEntry>::iterator&, unsigned dst, unsigned src1, unsigned src2, OperandTypes, bool op1HasImmediateIntFastCase, bool op2HasImmediateIntFastCase);
 611 #else
 612         void compileBinaryArithOpSlowCase(OpcodeID, Vector<SlowCaseEntry>::iterator&, unsigned dst, unsigned src1, unsigned src2, OperandTypes);
 613 #endif
 614
 615         void compileGetByIdHotPath(int baseVReg, Identifier*);
 616         void compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, bool isMethodCheck = false);
 617         void compileGetDirectOffset(RegisterID base, RegisterID result, size_t cachedOffset);
 618         void compileGetDirectOffset(JSObject* base, RegisterID result, size_t cachedOffset);
 619         void compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID offset, RegisterID scratch);
 620         void compilePutDirectOffset(RegisterID base, RegisterID value, size_t cachedOffset);
 621
 622 #if CPU(X86_64)
 623         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 624         static const int patchOffsetPutByIdStructure = 10;
 625         static const int patchOffsetPutByIdPropertyMapOffset = 31;
 626         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 627         static const int patchOffsetGetByIdStructure = 10;
 628         static const int patchOffsetGetByIdBranchToSlowCase = 20;
 629         static const int patchOffsetGetByIdPropertyMapOffset = 28;
 630         static const int patchOffsetGetByIdPutResult = 28;
 631 #if ENABLE(OPCODE_SAMPLING)
 632         static const int patchOffsetGetByIdSlowCaseCall = 64;
 633 #else
 634         static const int patchOffsetGetByIdSlowCaseCall = 54;
 635 #endif
 636         static const int patchOffsetOpCallCompareToJump = 9;
 637
 638         static const int patchOffsetMethodCheckProtoObj = 20;
 639         static const int patchOffsetMethodCheckProtoStruct = 30;
 640         static const int patchOffsetMethodCheckPutFunction = 50;
 641 #elif CPU(X86)
 642         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 643         static const int patchOffsetPutByIdStructure = 7;
 644         static const int patchOffsetPutByIdPropertyMapOffset = 22;
 645         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 646         static const int patchOffsetGetByIdStructure = 7;
 647         static const int patchOffsetGetByIdBranchToSlowCase = 13;
 648         static const int patchOffsetGetByIdPropertyMapOffset = 22;
 649         static const int patchOffsetGetByIdPutResult = 22;
 650 #if ENABLE(OPCODE_SAMPLING)
 651         static const int patchOffsetGetByIdSlowCaseCall = 33;
 652 #else
 653         static const int patchOffsetGetByIdSlowCaseCall = 23;
 654 #endif
 655         static const int patchOffsetOpCallCompareToJump = 6;
 656
 657         static const int patchOffsetMethodCheckProtoObj = 11;
 658         static const int patchOffsetMethodCheckProtoStruct = 18;
 659         static const int patchOffsetMethodCheckPutFunction = 29;
 660 #elif CPU(ARM_THUMB2)
 661         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 662         static const int patchOffsetPutByIdStructure = 10;
 663         static const int patchOffsetPutByIdPropertyMapOffset = 46;
 664         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 665         static const int patchOffsetGetByIdStructure = 10;
 666         static const int patchOffsetGetByIdBranchToSlowCase = 26;
 667         static const int patchOffsetGetByIdPropertyMapOffset = 46;
 668         static const int patchOffsetGetByIdPutResult = 50;
 669 #if ENABLE(OPCODE_SAMPLING)
 670         static const int patchOffsetGetByIdSlowCaseCall = 0; // FIMXE
 671 #else
 672         static const int patchOffsetGetByIdSlowCaseCall = 28;
 673 #endif
 674         static const int patchOffsetOpCallCompareToJump = 16;
 675
 676         static const int patchOffsetMethodCheckProtoObj = 24;
 677         static const int patchOffsetMethodCheckProtoStruct = 34;
 678         static const int patchOffsetMethodCheckPutFunction = 58;
 679 #elif CPU(ARM_TRADITIONAL)
 680         // These architecture specific value are used to enable patching - see comment on op_put_by_id.
 681         static const int patchOffsetPutByIdStructure = 4;
 682         static const int patchOffsetPutByIdPropertyMapOffset = 20;
 683         // These architecture specific value are used to enable patching - see comment on op_get_by_id.
 684         static const int patchOffsetGetByIdStructure = 4;
 685         static const int patchOffsetGetByIdBranchToSlowCase = 16;
 686         static const int patchOffsetGetByIdPropertyMapOffset = 20;
 687         static const int patchOffsetGetByIdPutResult = 28;
 688 #if ENABLE(OPCODE_SAMPLING)
 689         #error "OPCODE_SAMPLING is not yet supported"
 690 #else
 691         static const int patchOffsetGetByIdSlowCaseCall = 28;
 692 #endif
 693         static const int patchOffsetOpCallCompareToJump = 12;
 694
 695         static const int patchOffsetMethodCheckProtoObj = 12;
 696         static const int patchOffsetMethodCheckProtoStruct = 20;
 697         static const int patchOffsetMethodCheckPutFunction = 32;
 698
 699         // sequenceOpCall
 700         static const int sequenceOpCallInstructionSpace = 12;
 701         static const int sequenceOpCallConstantSpace = 2;
 702         // sequenceMethodCheck
 703         static const int sequenceMethodCheckInstructionSpace = 40;
 704         static const int sequenceMethodCheckConstantSpace = 6;
 705         // sequenceGetByIdHotPath
 706         static const int sequenceGetByIdHotPathInstructionSpace = 28;
 707         static const int sequenceGetByIdHotPathConstantSpace = 3;
 708         // sequenceGetByIdSlowCase
 709         static const int sequenceGetByIdSlowCaseInstructionSpace = 32;
 710         static const int sequenceGetByIdSlowCaseConstantSpace = 2;
 711         // sequencePutById
 712         static const int sequencePutByIdInstructionSpace = 28;
 713         static const int sequencePutByIdConstantSpace = 3;
 714 #elif CPU(MIPS)
 715 #if WTF_MIPS_ISA(1)
 716         static const int patchOffsetPutByIdStructure = 16;
 717         static const int patchOffsetPutByIdPropertyMapOffset = 68;
 718         static const int patchOffsetGetByIdStructure = 16;
 719         static const int patchOffsetGetByIdBranchToSlowCase = 48;
 720         static const int patchOffsetGetByIdPropertyMapOffset = 68;
 721         static const int patchOffsetGetByIdPutResult = 88;
 722 #if ENABLE(OPCODE_SAMPLING)
 723         #error "OPCODE_SAMPLING is not yet supported"
 724 #else
 725         static const int patchOffsetGetByIdSlowCaseCall = 40;
 726 #endif
 727         static const int patchOffsetOpCallCompareToJump = 32;
 728         static const int patchOffsetMethodCheckProtoObj = 32;
 729         static const int patchOffsetMethodCheckProtoStruct = 56;
 730         static const int patchOffsetMethodCheckPutFunction = 88;
 731 #else // WTF_MIPS_ISA(1)
 732         static const int patchOffsetPutByIdStructure = 12;
 733         static const int patchOffsetPutByIdPropertyMapOffset = 60;
 734         static const int patchOffsetGetByIdStructure = 12;
 735         static const int patchOffsetGetByIdBranchToSlowCase = 44;
 736         static const int patchOffsetGetByIdPropertyMapOffset = 60;
 737         static const int patchOffsetGetByIdPutResult = 76;
 738 #if ENABLE(OPCODE_SAMPLING)
 739         #error "OPCODE_SAMPLING is not yet supported"
 740 #else
 741         static const int patchOffsetGetByIdSlowCaseCall = 40;
 742 #endif
 743         static const int patchOffsetOpCallCompareToJump = 32;
 744         static const int patchOffsetMethodCheckProtoObj = 32;
 745         static const int patchOffsetMethodCheckProtoStruct = 52;
 746         static const int patchOffsetMethodCheckPutFunction = 84;
 747 #endif
 748 #endif
 749 #endif // USE(JSVALUE32_64)
 750
 751 #if (defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL)
 752 #define BEGIN_UNINTERRUPTED_SEQUENCE(name) do { beginUninterruptedSequence(name ## InstructionSpace, name ## ConstantSpace); } while (false)
 753 #define END_UNINTERRUPTED_SEQUENCE_FOR_PUT(name, dst) do { endUninterruptedSequence(name ## InstructionSpace, name ## ConstantSpace, dst); } while (false)
 754 #define END_UNINTERRUPTED_SEQUENCE(name) END_UNINTERRUPTED_SEQUENCE_FOR_PUT(name, 0)
 755
 756         void beginUninterruptedSequence(int, int);
 757         void endUninterruptedSequence(int, int, int);
 758
 759 #else
 760 #define BEGIN_UNINTERRUPTED_SEQUENCE(name)  do { beginUninterruptedSequence(); } while (false)
 761 #define END_UNINTERRUPTED_SEQUENCE(name)  do { endUninterruptedSequence(); } while (false)
 762 #define END_UNINTERRUPTED_SEQUENCE_FOR_PUT(name, dst) do { endUninterruptedSequence(); } while (false)
 763 #endif
 764
 765         void emit_compareAndJump(OpcodeID, unsigned op1, unsigned op2, unsigned target, RelationalCondition);
 766         void emit_compareAndJumpSlow(unsigned op1, unsigned op2, unsigned target, DoubleCondition, int (JIT_STUB *stub)(STUB_ARGS_DECLARATION), bool invert, Vector<SlowCaseEntry>::iterator&);
 767
 768         void emit_op_add(Instruction*);
 769         void emit_op_bitand(Instruction*);
 770         void emit_op_bitnot(Instruction*);
 771         void emit_op_bitor(Instruction*);
 772         void emit_op_bitxor(Instruction*);
 773         void emit_op_call(Instruction*);
 774         void emit_op_call_eval(Instruction*);
 775         void emit_op_call_varargs(Instruction*);
 776         void emit_op_call_put_result(Instruction*);
 777         void emit_op_catch(Instruction*);
 778         void emit_op_construct(Instruction*);
 779         void emit_op_get_callee(Instruction*);
 780         void emit_op_create_this(Instruction*);
 781         void emit_op_convert_this(Instruction*);
 782         void emit_op_create_arguments(Instruction*);
 783         void emit_op_debug(Instruction*);
 784         void emit_op_del_by_id(Instruction*);
 785         void emit_op_div(Instruction*);
 786         void emit_op_end(Instruction*);
 787         void emit_op_enter(Instruction*);
 788         void emit_op_create_activation(Instruction*);
 789         void emit_op_eq(Instruction*);
 790         void emit_op_eq_null(Instruction*);
 791         void emit_op_get_by_id(Instruction*);
 792         void emit_op_get_arguments_length(Instruction*);
 793         void emit_op_get_by_val(Instruction*);
 794         void emit_op_get_argument_by_val(Instruction*);
 795         void emit_op_get_by_pname(Instruction*);
 796         void emit_op_get_global_var(Instruction*);
 797         void emit_op_get_scoped_var(Instruction*);
 798         void emit_op_init_lazy_reg(Instruction*);
 799         void emit_op_check_has_instance(Instruction*);
 800         void emit_op_instanceof(Instruction*);
 801         void emit_op_jeq_null(Instruction*);
 802         void emit_op_jfalse(Instruction*);
 803         void emit_op_jmp(Instruction*);
 804         void emit_op_jmp_scopes(Instruction*);
 805         void emit_op_jneq_null(Instruction*);
 806         void emit_op_jneq_ptr(Instruction*);
 807         void emit_op_jless(Instruction*);
 808         void emit_op_jlesseq(Instruction*);
 809         void emit_op_jgreater(Instruction*);
 810         void emit_op_jgreatereq(Instruction*);
 811         void emit_op_jnless(Instruction*);
 812         void emit_op_jnlesseq(Instruction*);
 813         void emit_op_jngreater(Instruction*);
 814         void emit_op_jngreatereq(Instruction*);
 815         void emit_op_jsr(Instruction*);
 816         void emit_op_jtrue(Instruction*);
 817         void emit_op_load_varargs(Instruction*);
 818         void emit_op_loop(Instruction*);
 819         void emit_op_loop_hint(Instruction*);
 820         void emit_op_loop_if_less(Instruction*);
 821         void emit_op_loop_if_lesseq(Instruction*);
 822         void emit_op_loop_if_greater(Instruction*);
 823         void emit_op_loop_if_greatereq(Instruction*);
 824         void emit_op_loop_if_true(Instruction*);
 825         void emit_op_loop_if_false(Instruction*);
 826         void emit_op_lshift(Instruction*);
 827         void emit_op_method_check(Instruction*);
 828         void emit_op_mod(Instruction*);
 829         void emit_op_mov(Instruction*);
 830         void emit_op_mul(Instruction*);
 831         void emit_op_negate(Instruction*);
 832         void emit_op_neq(Instruction*);
 833         void emit_op_neq_null(Instruction*);
 834         void emit_op_new_array(Instruction*);
 835         void emit_op_new_array_buffer(Instruction*);
 836         void emit_op_new_func(Instruction*);
 837         void emit_op_new_func_exp(Instruction*);
 838         void emit_op_new_object(Instruction*);
 839         void emit_op_new_regexp(Instruction*);
 840         void emit_op_get_pnames(Instruction*);
 841         void emit_op_next_pname(Instruction*);
 842         void emit_op_not(Instruction*);
 843         void emit_op_nstricteq(Instruction*);
 844         void emit_op_pop_scope(Instruction*);
 845         void emit_op_post_dec(Instruction*);
 846         void emit_op_post_inc(Instruction*);
 847         void emit_op_pre_dec(Instruction*);
 848         void emit_op_pre_inc(Instruction*);
 849         void emit_op_profile_did_call(Instruction*);
 850         void emit_op_profile_will_call(Instruction*);
 851         void emit_op_push_new_scope(Instruction*);
 852         void emit_op_push_scope(Instruction*);
 853         void emit_op_put_by_id(Instruction*);
 854         void emit_op_put_by_index(Instruction*);
 855         void emit_op_put_by_val(Instruction*);
 856         void emit_op_put_getter(Instruction*);
 857         void emit_op_put_global_var(Instruction*);
 858         void emit_op_put_scoped_var(Instruction*);
 859         void emit_op_put_setter(Instruction*);
 860         void emit_op_resolve(Instruction*);
 861         void emit_op_resolve_base(Instruction*);
 862         void emit_op_ensure_property_exists(Instruction*);
 863         void emit_op_resolve_global(Instruction*, bool dynamic = false);
 864         void emit_op_resolve_global_dynamic(Instruction*);
 865         void emit_op_resolve_skip(Instruction*);
 866         void emit_op_resolve_with_base(Instruction*);
 867         void emit_op_resolve_with_this(Instruction*);
 868         void emit_op_ret(Instruction*);
 869         void emit_op_ret_object_or_this(Instruction*);
 870         void emit_op_rshift(Instruction*);
 871         void emit_op_sret(Instruction*);
 872         void emit_op_strcat(Instruction*);
 873         void emit_op_stricteq(Instruction*);
 874         void emit_op_sub(Instruction*);
 875         void emit_op_switch_char(Instruction*);
 876         void emit_op_switch_imm(Instruction*);
 877         void emit_op_switch_string(Instruction*);
 878         void emit_op_tear_off_activation(Instruction*);
 879         void emit_op_tear_off_arguments(Instruction*);
 880         void emit_op_throw(Instruction*);
 881         void emit_op_throw_reference_error(Instruction*);
 882         void emit_op_to_jsnumber(Instruction*);
 883         void emit_op_to_primitive(Instruction*);
 884         void emit_op_unexpected_load(Instruction*);
 885         void emit_op_urshift(Instruction*);
 886 #if ENABLE(JIT_USE_SOFT_MODULO)
 887         void softModulo();
 888 #endif
 889
 890         void emitSlow_op_add(Instruction*, Vector<SlowCaseEntry>::iterator&);
 891         void emitSlow_op_bitand(Instruction*, Vector<SlowCaseEntry>::iterator&);
 892         void emitSlow_op_bitnot(Instruction*, Vector<SlowCaseEntry>::iterator&);
 893         void emitSlow_op_bitor(Instruction*, Vector<SlowCaseEntry>::iterator&);
 894         void emitSlow_op_bitxor(Instruction*, Vector<SlowCaseEntry>::iterator&);
 895         void emitSlow_op_call(Instruction*, Vector<SlowCaseEntry>::iterator&);
 896         void emitSlow_op_call_eval(Instruction*, Vector<SlowCaseEntry>::iterator&);
 897         void emitSlow_op_call_varargs(Instruction*, Vector<SlowCaseEntry>::iterator&);
 898         void emitSlow_op_construct(Instruction*, Vector<SlowCaseEntry>::iterator&);
 899         void emitSlow_op_convert_this(Instruction*, Vector<SlowCaseEntry>::iterator&);
 900         void emitSlow_op_create_this(Instruction*, Vector<SlowCaseEntry>::iterator&);
 901         void emitSlow_op_div(Instruction*, Vector<SlowCaseEntry>::iterator&);
 902         void emitSlow_op_eq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 903         void emitSlow_op_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);
 904         void emitSlow_op_get_arguments_length(Instruction*, Vector<SlowCaseEntry>::iterator&);
 905         void emitSlow_op_get_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
 906         void emitSlow_op_get_argument_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
 907         void emitSlow_op_get_by_pname(Instruction*, Vector<SlowCaseEntry>::iterator&);
 908         void emitSlow_op_check_has_instance(Instruction*, Vector<SlowCaseEntry>::iterator&);
 909         void emitSlow_op_instanceof(Instruction*, Vector<SlowCaseEntry>::iterator&);
 910         void emitSlow_op_jfalse(Instruction*, Vector<SlowCaseEntry>::iterator&);
 911         void emitSlow_op_jless(Instruction*, Vector<SlowCaseEntry>::iterator&);
 912         void emitSlow_op_jlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 913         void emitSlow_op_jgreater(Instruction*, Vector<SlowCaseEntry>::iterator&);
 914         void emitSlow_op_jgreatereq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 915         void emitSlow_op_jnless(Instruction*, Vector<SlowCaseEntry>::iterator&);
 916         void emitSlow_op_jnlesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 917         void emitSlow_op_jngreater(Instruction*, Vector<SlowCaseEntry>::iterator&);
 918         void emitSlow_op_jngreatereq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 919         void emitSlow_op_jtrue(Instruction*, Vector<SlowCaseEntry>::iterator&);
 920         void emitSlow_op_load_varargs(Instruction*, Vector<SlowCaseEntry>::iterator&);
 921         void emitSlow_op_loop_if_less(Instruction*, Vector<SlowCaseEntry>::iterator&);
 922         void emitSlow_op_loop_if_lesseq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 923         void emitSlow_op_loop_if_greater(Instruction*, Vector<SlowCaseEntry>::iterator&);
 924         void emitSlow_op_loop_if_greatereq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 925         void emitSlow_op_loop_if_true(Instruction*, Vector<SlowCaseEntry>::iterator&);
 926         void emitSlow_op_loop_if_false(Instruction*, Vector<SlowCaseEntry>::iterator&);
 927         void emitSlow_op_lshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
 928         void emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&);
 929         void emitSlow_op_mod(Instruction*, Vector<SlowCaseEntry>::iterator&);
 930         void emitSlow_op_mul(Instruction*, Vector<SlowCaseEntry>::iterator&);
 931         void emitSlow_op_negate(Instruction*, Vector<SlowCaseEntry>::iterator&);
 932         void emitSlow_op_neq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 933         void emitSlow_op_new_object(Instruction*, Vector<SlowCaseEntry>::iterator&);
 934         void emitSlow_op_not(Instruction*, Vector<SlowCaseEntry>::iterator&);
 935         void emitSlow_op_nstricteq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 936         void emitSlow_op_post_dec(Instruction*, Vector<SlowCaseEntry>::iterator&);
 937         void emitSlow_op_post_inc(Instruction*, Vector<SlowCaseEntry>::iterator&);
 938         void emitSlow_op_pre_dec(Instruction*, Vector<SlowCaseEntry>::iterator&);
 939         void emitSlow_op_pre_inc(Instruction*, Vector<SlowCaseEntry>::iterator&);
 940         void emitSlow_op_put_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&);
 941         void emitSlow_op_put_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&);
 942         void emitSlow_op_resolve_global(Instruction*, Vector<SlowCaseEntry>::iterator&);
 943         void emitSlow_op_resolve_global_dynamic(Instruction*, Vector<SlowCaseEntry>::iterator&);
 944         void emitSlow_op_rshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
 945         void emitSlow_op_stricteq(Instruction*, Vector<SlowCaseEntry>::iterator&);
 946         void emitSlow_op_sub(Instruction*, Vector<SlowCaseEntry>::iterator&);
 947         void emitSlow_op_to_jsnumber(Instruction*, Vector<SlowCaseEntry>::iterator&);
 948         void emitSlow_op_to_primitive(Instruction*, Vector<SlowCaseEntry>::iterator&);
 949         void emitSlow_op_urshift(Instruction*, Vector<SlowCaseEntry>::iterator&);
 950         void emitSlow_op_new_func(Instruction*, Vector<SlowCaseEntry>::iterator&);
 951         void emitSlow_op_new_func_exp(Instruction*, Vector<SlowCaseEntry>::iterator&);
 952
 953
 954         void emitRightShift(Instruction*, bool isUnsigned);
 955         void emitRightShiftSlowCase(Instruction*, Vector<SlowCaseEntry>::iterator&, bool isUnsigned);
 956
 957         /* This function is deprecated. */
 958         void emitGetJITStubArg(unsigned argumentNumber, RegisterID dst);
 959
 960         void emitInitRegister(unsigned dst);
 961
 962         void emitPutToCallFrameHeader(RegisterID from, RegisterFile::CallFrameHeaderEntry entry);
 963         void emitPutCellToCallFrameHeader(RegisterID from, RegisterFile::CallFrameHeaderEntry);
 964         void emitPutIntToCallFrameHeader(RegisterID from, RegisterFile::CallFrameHeaderEntry);
 965         void emitPutImmediateToCallFrameHeader(void* value, RegisterFile::CallFrameHeaderEntry entry);
 966         void emitGetFromCallFrameHeaderPtr(RegisterFile::CallFrameHeaderEntry entry, RegisterID to, RegisterID from = callFrameRegister);
 967         void emitGetFromCallFrameHeader32(RegisterFile::CallFrameHeaderEntry entry, RegisterID to, RegisterID from = callFrameRegister);
 968
 969         JSValue getConstantOperand(unsigned src);
 970         bool isOperandConstantImmediateInt(unsigned src);
 971         bool isOperandConstantImmediateChar(unsigned src);
 972
 973         bool atJumpTarget();
 974
 975         Jump getSlowCase(Vector<SlowCaseEntry>::iterator& iter)
 976         {
 977             return iter++->from;
 978         }
 979         void linkSlowCase(Vector<SlowCaseEntry>::iterator& iter)
 980         {
 981             iter->from.link(this);
 982             ++iter;
 983         }
 984         void linkDummySlowCase(Vector<SlowCaseEntry>::iterator& iter)
 985         {
 986             ASSERT(!iter->from.isSet());
 987             ++iter;
 988         }
 989         void linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator&, int vReg);
 990
 991         Jump checkStructure(RegisterID reg, Structure* structure);
 992
 993         void restoreArgumentReference();
 994         void restoreArgumentReferenceForTrampoline();
 995         void updateTopCallFrame();
 996
 997         Call emitNakedCall(CodePtr function = CodePtr());
 998
 999         void preserveReturnAddressAfterCall(RegisterID);
1000         void restoreReturnAddressBeforeReturn(RegisterID);
1001         void restoreReturnAddressBeforeReturn(Address);
1002
1003         // Loads the character value of a single character string into dst.
1004         void emitLoadCharacterString(RegisterID src, RegisterID dst, JumpList& failures);
1005
1006         enum OptimizationCheckKind { LoopOptimizationCheck, RetOptimizationCheck };
1007 #if ENABLE(DFG_JIT)
1008         void emitOptimizationCheck(OptimizationCheckKind);
1009 #else
1010         void emitOptimizationCheck(OptimizationCheckKind) { }
1011 #endif
1012
1013         void emitTimeoutCheck();
1014 #ifndef NDEBUG
1015         void printBytecodeOperandTypes(unsigned src1, unsigned src2);
1016 #endif
1017
1018 #if ENABLE(SAMPLING_FLAGS)
1019         void setSamplingFlag(int32_t);
1020         void clearSamplingFlag(int32_t);
1021 #endif
1022
1023 #if ENABLE(SAMPLING_COUNTERS)
1024         void emitCount(AbstractSamplingCounter&, uint32_t = 1);
1025 #endif
1026
1027 #if ENABLE(OPCODE_SAMPLING)
1028         void sampleInstruction(Instruction*, bool = false);
1029 #endif
1030
1031 #if ENABLE(CODEBLOCK_SAMPLING)
1032         void sampleCodeBlock(CodeBlock*);
1033 #else
1034         void sampleCodeBlock(CodeBlock*) {}
1035 #endif
1036
1037 #if ENABLE(DFG_JIT)
1038         bool canBeOptimized() { return m_canBeOptimized; }
1039         bool shouldEmitProfiling() { return m_canBeOptimized; }
1040 #else
1041         bool canBeOptimized() { return false; }
1042         // Enables use of value profiler with tiered compilation turned off,
1043         // in which case all code gets profiled.
1044         bool shouldEmitProfiling() { return true; }
1045 #endif
1046
1047         Interpreter* m_interpreter;
1048         JSGlobalData* m_globalData;
1049         CodeBlock* m_codeBlock;
1050
1051         Vector<CallRecord> m_calls;
1052         Vector<Label> m_labels;
1053         Vector<PropertyStubCompilationInfo> m_propertyAccessCompilationInfo;
1054         Vector<StructureStubCompilationInfo> m_callStructureStubCompilationInfo;
1055         Vector<MethodCallCompilationInfo> m_methodCallCompilationInfo;
1056         Vector<JumpTable> m_jmpTable;
1057
1058         unsigned m_bytecodeOffset;
1059         Vector<JSRInfo> m_jsrSites;
1060         Vector<SlowCaseEntry> m_slowCases;
1061         Vector<SwitchRecord> m_switches;
1062
1063         unsigned m_propertyAccessInstructionIndex;
1064         unsigned m_globalResolveInfoIndex;
1065         unsigned m_callLinkInfoIndex;
1066
1067 #if USE(JSVALUE32_64)
1068         unsigned m_jumpTargetIndex;
1069         unsigned m_mappedBytecodeOffset;
1070         unsigned m_mappedVirtualRegisterIndex;
1071         RegisterID m_mappedTag;
1072         RegisterID m_mappedPayload;
1073 #else
1074         int m_lastResultBytecodeRegister;
1075 #endif
1076         unsigned m_jumpTargetsPosition;
1077
1078 #ifndef NDEBUG
1079 #if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL
1080         Label m_uninterruptedInstructionSequenceBegin;
1081         int m_uninterruptedConstantSequenceBegin;
1082 #endif
1083 #endif
1084         WeakRandom m_randomGenerator;
1085         static CodeRef stringGetByValStubGenerator(JSGlobalData*);
1086
1087 #if ENABLE(VALUE_PROFILER)
1088         bool m_canBeOptimized;
1089 #endif
1090 #if ENABLE(DFG_JIT) || ENABLE(JIT_VERBOSE)
1091         Label m_startOfCode;
1092 #endif
1093 #if ENABLE(DFG_JIT)
1094         CompactJITCodeMap::Encoder m_jitCodeMapEncoder;
1095 #endif
1096     } JIT_CLASS_ALIGNMENT;
1097
1098     inline void JIT::emit_op_loop(Instruction* currentInstruction)
1099     {
1100         emitTimeoutCheck();
1101         emit_op_jmp(currentInstruction);
1102     }
1103
1104     inline void JIT::emit_op_loop_hint(Instruction*)
1105     {
1106         emitOptimizationCheck(LoopOptimizationCheck);
1107     }
1108
1109     inline void JIT::emit_op_loop_if_true(Instruction* currentInstruction)
1110     {
1111         emitTimeoutCheck();
1112         emit_op_jtrue(currentInstruction);
1113     }
1114
1115     inline void JIT::emitSlow_op_loop_if_true(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1116     {
1117         emitSlow_op_jtrue(currentInstruction, iter);
1118     }
1119
1120     inline void JIT::emit_op_loop_if_false(Instruction* currentInstruction)
1121     {
1122         emitTimeoutCheck();
1123         emit_op_jfalse(currentInstruction);
1124     }
1125
1126     inline void JIT::emitSlow_op_loop_if_false(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1127     {
1128         emitSlow_op_jfalse(currentInstruction, iter);
1129     }
1130
1131     inline void JIT::emit_op_loop_if_less(Instruction* currentInstruction)
1132     {
1133         emitTimeoutCheck();
1134         emit_op_jless(currentInstruction);
1135     }
1136
1137     inline void JIT::emitSlow_op_loop_if_less(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1138     {
1139         emitSlow_op_jless(currentInstruction, iter);
1140     }
1141
1142     inline void JIT::emit_op_loop_if_lesseq(Instruction* currentInstruction)
1143     {
1144         emitTimeoutCheck();
1145         emit_op_jlesseq(currentInstruction);
1146     }
1147
1148     inline void JIT::emitSlow_op_loop_if_lesseq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1149     {
1150         emitSlow_op_jlesseq(currentInstruction, iter);
1151     }
1152
1153     inline void JIT::emit_op_loop_if_greater(Instruction* currentInstruction)
1154     {
1155         emitTimeoutCheck();
1156         emit_op_jgreater(currentInstruction);
1157     }
1158
1159     inline void JIT::emitSlow_op_loop_if_greater(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1160     {
1161         emitSlow_op_jgreater(currentInstruction, iter);
1162     }
1163
1164     inline void JIT::emit_op_loop_if_greatereq(Instruction* currentInstruction)
1165     {
1166         emitTimeoutCheck();
1167         emit_op_jgreatereq(currentInstruction);
1168     }
1169
1170     inline void JIT::emitSlow_op_loop_if_greatereq(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
1171     {
1172         emitSlow_op_jgreatereq(currentInstruction, iter);
1173     }
1174
1175 } // namespace JSC
1176
1177 #endif // ENABLE(JIT)
1178
1179 #endif // JIT_h