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