jit/JITInlineMethods.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 JITInlineMethods_h
  27 #define JITInlineMethods_h
  28
  29
  30 #if ENABLE(JIT)
  31
  32 namespace JSC {
  33
  34 /* Deprecated: Please use JITStubCall instead. */
  35
  36 ALWAYS_INLINE void JIT::emitGetJITStubArg(unsigned argumentNumber, RegisterID dst)
  37 {
  38     unsigned argumentStackOffset = (argumentNumber * (sizeof(JSValue) / sizeof(void*))) + JITSTACKFRAME_ARGS_INDEX;
  39     peek(dst, argumentStackOffset);
  40 }
  41
  42 ALWAYS_INLINE bool JIT::isOperandConstantImmediateDouble(unsigned src)
  43 {
  44     return m_codeBlock->isConstantRegisterIndex(src) && getConstantOperand(src).isDouble();
  45 }
  46
  47 ALWAYS_INLINE JSValue JIT::getConstantOperand(unsigned src)
  48 {
  49     ASSERT(m_codeBlock->isConstantRegisterIndex(src));
  50     return m_codeBlock->getConstant(src);
  51 }
  52
  53 ALWAYS_INLINE void JIT::emitPutToCallFrameHeader(RegisterID from, RegisterFile::CallFrameHeaderEntry entry)
  54 {
  55     storePtr(from, payloadFor(entry, callFrameRegister));
  56 }
  57
  58 ALWAYS_INLINE void JIT::emitPutCellToCallFrameHeader(RegisterID from, RegisterFile::CallFrameHeaderEntry entry)
  59 {
  60 #if USE(JSVALUE32_64)
  61     store32(TrustedImm32(JSValue::CellTag), tagFor(entry, callFrameRegister));
  62 #endif
  63     storePtr(from, payloadFor(entry, callFrameRegister));
  64 }
  65
  66 ALWAYS_INLINE void JIT::emitPutIntToCallFrameHeader(RegisterID from, RegisterFile::CallFrameHeaderEntry entry)
  67 {
  68     store32(TrustedImm32(Int32Tag), intTagFor(entry, callFrameRegister));
  69     store32(from, intPayloadFor(entry, callFrameRegister));
  70 }
  71
  72 ALWAYS_INLINE void JIT::emitPutImmediateToCallFrameHeader(void* value, RegisterFile::CallFrameHeaderEntry entry)
  73 {
  74     storePtr(TrustedImmPtr(value), Address(callFrameRegister, entry * sizeof(Register)));
  75 }
  76
  77 ALWAYS_INLINE void JIT::emitGetFromCallFrameHeaderPtr(RegisterFile::CallFrameHeaderEntry entry, RegisterID to, RegisterID from)
  78 {
  79     loadPtr(Address(from, entry * sizeof(Register)), to);
  80 #if USE(JSVALUE64)
  81     killLastResultRegister();
  82 #endif
  83 }
  84
  85 ALWAYS_INLINE void JIT::emitLoadCharacterString(RegisterID src, RegisterID dst, JumpList& failures)
  86 {
  87     failures.append(branchPtr(NotEqual, Address(src, JSCell::classInfoOffset()), TrustedImmPtr(&JSString::s_info)));
  88     failures.append(branch32(NotEqual, MacroAssembler::Address(src, ThunkHelpers::jsStringLengthOffset()), TrustedImm32(1)));
  89     loadPtr(MacroAssembler::Address(src, ThunkHelpers::jsStringValueOffset()), dst);
  90     failures.append(branchTest32(Zero, dst));
  91     loadPtr(MacroAssembler::Address(dst, ThunkHelpers::stringImplFlagsOffset()), regT1);
  92     loadPtr(MacroAssembler::Address(dst, ThunkHelpers::stringImplDataOffset()), dst);
  93
  94     JumpList is16Bit;
  95     JumpList cont8Bit;
  96     is16Bit.append(branchTest32(Zero, regT1, TrustedImm32(ThunkHelpers::stringImpl8BitFlag())));
  97     load8(MacroAssembler::Address(dst, 0), dst);
  98     cont8Bit.append(jump());
  99     is16Bit.link(this);
 100     load16(MacroAssembler::Address(dst, 0), dst);
 101     cont8Bit.link(this);
 102 }
 103
 104 ALWAYS_INLINE void JIT::emitGetFromCallFrameHeader32(RegisterFile::CallFrameHeaderEntry entry, RegisterID to, RegisterID from)
 105 {
 106     load32(Address(from, entry * sizeof(Register)), to);
 107 #if USE(JSVALUE64)
 108     killLastResultRegister();
 109 #endif
 110 }
 111
 112 ALWAYS_INLINE JIT::Call JIT::emitNakedCall(CodePtr function)
 113 {
 114     ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set.
 115
 116     Call nakedCall = nearCall();
 117     m_calls.append(CallRecord(nakedCall, m_bytecodeOffset, function.executableAddress()));
 118     return nakedCall;
 119 }
 120
 121 ALWAYS_INLINE bool JIT::atJumpTarget()
 122 {
 123     while (m_jumpTargetsPosition < m_codeBlock->numberOfJumpTargets() && m_codeBlock->jumpTarget(m_jumpTargetsPosition) <= m_bytecodeOffset) {
 124         if (m_codeBlock->jumpTarget(m_jumpTargetsPosition) == m_bytecodeOffset)
 125             return true;
 126         ++m_jumpTargetsPosition;
 127     }
 128     return false;
 129 }
 130
 131 #if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL
 132
 133 ALWAYS_INLINE void JIT::beginUninterruptedSequence(int insnSpace, int constSpace)
 134 {
 135 #if CPU(ARM_TRADITIONAL)
 136 #ifndef NDEBUG
 137     // Ensure the label after the sequence can also fit
 138     insnSpace += sizeof(ARMWord);
 139     constSpace += sizeof(uint64_t);
 140 #endif
 141
 142     ensureSpace(insnSpace, constSpace);
 143
 144 #elif CPU(SH4)
 145 #ifndef NDEBUG
 146     insnSpace += sizeof(SH4Word);
 147     constSpace += sizeof(uint64_t);
 148 #endif
 149
 150     m_assembler.ensureSpace(insnSpace + m_assembler.maxInstructionSize + 2, constSpace + 8);
 151 #endif
 152
 153 #if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL
 154 #ifndef NDEBUG
 155     m_uninterruptedInstructionSequenceBegin = label();
 156     m_uninterruptedConstantSequenceBegin = sizeOfConstantPool();
 157 #endif
 158 #endif
 159 }
 160
 161 ALWAYS_INLINE void JIT::endUninterruptedSequence(int insnSpace, int constSpace, int dst)
 162 {
 163     UNUSED_PARAM(dst);
 164 #if defined(ASSEMBLER_HAS_CONSTANT_POOL) && ASSEMBLER_HAS_CONSTANT_POOL
 165     /* There are several cases when the uninterrupted sequence is larger than
 166      * maximum required offset for pathing the same sequence. Eg.: if in a
 167      * uninterrupted sequence the last macroassembler's instruction is a stub
 168      * call, it emits store instruction(s) which should not be included in the
 169      * calculation of length of uninterrupted sequence. So, the insnSpace and
 170      * constSpace should be upper limit instead of hard limit.
 171      */
 172 #if CPU(SH4)
 173     if ((dst > 15) || (dst < -16)) {
 174         insnSpace += 8;
 175         constSpace += 2;
 176     }
 177
 178     if (((dst >= -16) && (dst < 0)) || ((dst > 7) && (dst <= 15)))
 179         insnSpace += 8;
 180 #endif
 181     ASSERT(differenceBetween(m_uninterruptedInstructionSequenceBegin, label()) <= insnSpace);
 182     ASSERT(sizeOfConstantPool() - m_uninterruptedConstantSequenceBegin <= constSpace);
 183 #endif
 184 }
 185
 186 #endif
 187
 188 #if CPU(ARM)
 189
 190 ALWAYS_INLINE void JIT::preserveReturnAddressAfterCall(RegisterID reg)
 191 {
 192     move(linkRegister, reg);
 193 }
 194
 195 ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(RegisterID reg)
 196 {
 197     move(reg, linkRegister);
 198 }
 199
 200 ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(Address address)
 201 {
 202     loadPtr(address, linkRegister);
 203 }
 204 #elif CPU(SH4)
 205
 206 ALWAYS_INLINE void JIT::preserveReturnAddressAfterCall(RegisterID reg)
 207 {
 208     m_assembler.stspr(reg);
 209 }
 210
 211 ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(RegisterID reg)
 212 {
 213     m_assembler.ldspr(reg);
 214 }
 215
 216 ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(Address address)
 217 {
 218     loadPtrLinkReg(address);
 219 }
 220
 221 #elif CPU(MIPS)
 222
 223 ALWAYS_INLINE void JIT::preserveReturnAddressAfterCall(RegisterID reg)
 224 {
 225     move(returnAddressRegister, reg);
 226 }
 227
 228 ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(RegisterID reg)
 229 {
 230     move(reg, returnAddressRegister);
 231 }
 232
 233 ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(Address address)
 234 {
 235     loadPtr(address, returnAddressRegister);
 236 }
 237
 238 #else // CPU(X86) || CPU(X86_64)
 239
 240 ALWAYS_INLINE void JIT::preserveReturnAddressAfterCall(RegisterID reg)
 241 {
 242     pop(reg);
 243 }
 244
 245 ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(RegisterID reg)
 246 {
 247     push(reg);
 248 }
 249
 250 ALWAYS_INLINE void JIT::restoreReturnAddressBeforeReturn(Address address)
 251 {
 252     push(address);
 253 }
 254
 255 #endif
 256
 257 ALWAYS_INLINE void JIT::restoreArgumentReference()
 258 {
 259     move(stackPointerRegister, firstArgumentRegister);
 260     poke(callFrameRegister, OBJECT_OFFSETOF(struct JITStackFrame, callFrame) / sizeof(void*));
 261 }
 262
 263 ALWAYS_INLINE void JIT::updateTopCallFrame()
 264 {
 265     ASSERT(static_cast<int>(m_bytecodeOffset) >= 0);
 266     if (m_bytecodeOffset) {
 267 #if USE(JSVALUE32_64)
 268         storePtr(TrustedImmPtr(m_codeBlock->instructions().begin() + m_bytecodeOffset + 1), intTagFor(RegisterFile::ArgumentCount));
 269 #else
 270         store32(TrustedImm32(m_bytecodeOffset + 1), intTagFor(RegisterFile::ArgumentCount));
 271 #endif
 272     }
 273     storePtr(callFrameRegister, &m_globalData->topCallFrame);
 274 }
 275
 276 ALWAYS_INLINE void JIT::restoreArgumentReferenceForTrampoline()
 277 {
 278 #if CPU(X86)
 279     // Within a trampoline the return address will be on the stack at this point.
 280     addPtr(TrustedImm32(sizeof(void*)), stackPointerRegister, firstArgumentRegister);
 281 #elif CPU(ARM)
 282     move(stackPointerRegister, firstArgumentRegister);
 283 #elif CPU(SH4)
 284     move(stackPointerRegister, firstArgumentRegister);
 285 #endif
 286     // In the trampoline on x86-64, the first argument register is not overwritten.
 287 }
 288
 289 ALWAYS_INLINE JIT::Jump JIT::checkStructure(RegisterID reg, Structure* structure)
 290 {
 291     return branchPtr(NotEqual, Address(reg, JSCell::structureOffset()), TrustedImmPtr(structure));
 292 }
 293
 294 ALWAYS_INLINE void JIT::linkSlowCaseIfNotJSCell(Vector<SlowCaseEntry>::iterator& iter, int vReg)
 295 {
 296     if (!m_codeBlock->isKnownNotImmediate(vReg))
 297         linkSlowCase(iter);
 298 }
 299
 300 ALWAYS_INLINE void JIT::addSlowCase(Jump jump)
 301 {
 302     ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set.
 303
 304     m_slowCases.append(SlowCaseEntry(jump, m_bytecodeOffset));
 305 }
 306
 307 ALWAYS_INLINE void JIT::addSlowCase(JumpList jumpList)
 308 {
 309     ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set.
 310
 311     const JumpList::JumpVector& jumpVector = jumpList.jumps();
 312     size_t size = jumpVector.size();
 313     for (size_t i = 0; i < size; ++i)
 314         m_slowCases.append(SlowCaseEntry(jumpVector[i], m_bytecodeOffset));
 315 }
 316
 317 ALWAYS_INLINE void JIT::addSlowCase()
 318 {
 319     ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set.
 320
 321     Jump emptyJump; // Doing it this way to make Windows happy.
 322     m_slowCases.append(SlowCaseEntry(emptyJump, m_bytecodeOffset));
 323 }
 324
 325 ALWAYS_INLINE void JIT::addJump(Jump jump, int relativeOffset)
 326 {
 327     ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set.
 328
 329     m_jmpTable.append(JumpTable(jump, m_bytecodeOffset + relativeOffset));
 330 }
 331
 332 ALWAYS_INLINE void JIT::emitJumpSlowToHot(Jump jump, int relativeOffset)
 333 {
 334     ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set.
 335
 336     jump.linkTo(m_labels[m_bytecodeOffset + relativeOffset], this);
 337 }
 338
 339 ALWAYS_INLINE JIT::Jump JIT::emitJumpIfNotObject(RegisterID structureReg)
 340 {
 341     return branch8(Below, Address(structureReg, Structure::typeInfoTypeOffset()), TrustedImm32(ObjectType));
 342 }
 343
 344 ALWAYS_INLINE JIT::Jump JIT::emitJumpIfNotType(RegisterID baseReg, RegisterID scratchReg, JSType type)
 345 {
 346     loadPtr(Address(baseReg, JSCell::structureOffset()), scratchReg);
 347     return branch8(NotEqual, Address(scratchReg, Structure::typeInfoTypeOffset()), TrustedImm32(type));
 348 }
 349
 350 #if ENABLE(SAMPLING_FLAGS)
 351 ALWAYS_INLINE void JIT::setSamplingFlag(int32_t flag)
 352 {
 353     ASSERT(flag >= 1);
 354     ASSERT(flag <= 32);
 355     or32(TrustedImm32(1u << (flag - 1)), AbsoluteAddress(SamplingFlags::addressOfFlags()));
 356 }
 357
 358 ALWAYS_INLINE void JIT::clearSamplingFlag(int32_t flag)
 359 {
 360     ASSERT(flag >= 1);
 361     ASSERT(flag <= 32);
 362     and32(TrustedImm32(~(1u << (flag - 1))), AbsoluteAddress(SamplingFlags::addressOfFlags()));
 363 }
 364 #endif
 365
 366 #if ENABLE(SAMPLING_COUNTERS)
 367 ALWAYS_INLINE void JIT::emitCount(AbstractSamplingCounter& counter, int32_t count)
 368 {
 369     add64(TrustedImm32(count), AbsoluteAddress(counter.addressOfCounter()));
 370 }
 371 #endif
 372
 373 #if ENABLE(OPCODE_SAMPLING)
 374 #if CPU(X86_64)
 375 ALWAYS_INLINE void JIT::sampleInstruction(Instruction* instruction, bool inHostFunction)
 376 {
 377     move(TrustedImmPtr(m_interpreter->sampler()->sampleSlot()), X86Registers::ecx);
 378     storePtr(TrustedImmPtr(m_interpreter->sampler()->encodeSample(instruction, inHostFunction)), X86Registers::ecx);
 379 }
 380 #else
 381 ALWAYS_INLINE void JIT::sampleInstruction(Instruction* instruction, bool inHostFunction)
 382 {
 383     storePtr(TrustedImmPtr(m_interpreter->sampler()->encodeSample(instruction, inHostFunction)), m_interpreter->sampler()->sampleSlot());
 384 }
 385 #endif
 386 #endif
 387
 388 #if ENABLE(CODEBLOCK_SAMPLING)
 389 #if CPU(X86_64)
 390 ALWAYS_INLINE void JIT::sampleCodeBlock(CodeBlock* codeBlock)
 391 {
 392     move(TrustedImmPtr(m_interpreter->sampler()->codeBlockSlot()), X86Registers::ecx);
 393     storePtr(TrustedImmPtr(codeBlock), X86Registers::ecx);
 394 }
 395 #else
 396 ALWAYS_INLINE void JIT::sampleCodeBlock(CodeBlock* codeBlock)
 397 {
 398     storePtr(TrustedImmPtr(codeBlock), m_interpreter->sampler()->codeBlockSlot());
 399 }
 400 #endif
 401 #endif
 402
 403 ALWAYS_INLINE bool JIT::isOperandConstantImmediateChar(unsigned src)
 404 {
 405     return m_codeBlock->isConstantRegisterIndex(src) && getConstantOperand(src).isString() && asString(getConstantOperand(src).asCell())->length() == 1;
 406 }
 407
 408 template <typename ClassType, bool destructor, typename StructureType> inline void JIT::emitAllocateBasicJSObject(StructureType structure, RegisterID result, RegisterID storagePtr)
 409 {
 410     MarkedAllocator* allocator = 0;
 411     if (destructor)
 412         allocator = &m_globalData->heap.allocatorForObjectWithDestructor(sizeof(ClassType));
 413     else
 414         allocator = &m_globalData->heap.allocatorForObjectWithoutDestructor(sizeof(ClassType));
 415     loadPtr(&allocator->m_freeList.head, result);
 416     addSlowCase(branchTestPtr(Zero, result));
 417
 418     // remove the object from the free list
 419     loadPtr(Address(result), storagePtr);
 420     storePtr(storagePtr, &allocator->m_freeList.head);
 421
 422     // initialize the object's structure
 423     storePtr(structure, Address(result, JSCell::structureOffset()));
 424
 425     // initialize the object's classInfo pointer
 426     storePtr(TrustedImmPtr(&ClassType::s_info), Address(result, JSCell::classInfoOffset()));
 427
 428     // initialize the inheritor ID
 429     storePtr(TrustedImmPtr(0), Address(result, JSObject::offsetOfInheritorID()));
 430
 431     // initialize the object's property storage pointer
 432     addPtr(TrustedImm32(sizeof(JSObject)), result, storagePtr);
 433     storePtr(storagePtr, Address(result, ClassType::offsetOfPropertyStorage()));
 434 }
 435
 436 template <typename T> inline void JIT::emitAllocateJSFinalObject(T structure, RegisterID result, RegisterID scratch)
 437 {
 438     emitAllocateBasicJSObject<JSFinalObject, false, T>(structure, result, scratch);
 439 }
 440
 441 inline void JIT::emitAllocateJSFunction(FunctionExecutable* executable, RegisterID scopeChain, RegisterID result, RegisterID storagePtr)
 442 {
 443     emitAllocateBasicJSObject<JSFunction, true>(TrustedImmPtr(m_codeBlock->globalObject()->namedFunctionStructure()), result, storagePtr);
 444
 445     // store the function's scope chain
 446     storePtr(scopeChain, Address(result, JSFunction::offsetOfScopeChain()));
 447
 448     // store the function's executable member
 449     storePtr(TrustedImmPtr(executable), Address(result, JSFunction::offsetOfExecutable()));
 450
 451     // store the function's name
 452     ASSERT(executable->nameValue());
 453     int functionNameOffset = sizeof(JSValue) * m_codeBlock->globalObject()->functionNameOffset();
 454     storePtr(TrustedImmPtr(executable->nameValue()), Address(regT1, functionNameOffset + OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
 455 #if USE(JSVALUE32_64)
 456     store32(TrustedImm32(JSValue::CellTag), Address(regT1, functionNameOffset + OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
 457 #endif
 458 }
 459
 460 inline void JIT::emitAllocateBasicStorage(size_t size, RegisterID result, RegisterID storagePtr)
 461 {
 462     CopiedAllocator* allocator = &m_globalData->heap.storageAllocator();
 463
 464     // FIXME: We need to check for wrap-around.
 465     // Check to make sure that the allocation will fit in the current block.
 466     loadPtr(&allocator->m_currentOffset, result);
 467     addPtr(TrustedImm32(size), result);
 468     loadPtr(&allocator->m_currentBlock, storagePtr);
 469     addPtr(TrustedImm32(HeapBlock::s_blockSize), storagePtr);
 470     addSlowCase(branchPtr(AboveOrEqual, result, storagePtr));
 471
 472     // Load the original offset.
 473     loadPtr(&allocator->m_currentOffset, result);
 474
 475     // Bump the pointer forward.
 476     move(result, storagePtr);
 477     addPtr(TrustedImm32(size), storagePtr);
 478     storePtr(storagePtr, &allocator->m_currentOffset);
 479 }
 480
 481 inline void JIT::emitAllocateJSArray(unsigned valuesRegister, unsigned length, RegisterID cellResult, RegisterID storageResult, RegisterID storagePtr)
 482 {
 483     unsigned initialLength = std::max(length, 4U);
 484     size_t initialStorage = JSArray::storageSize(initialLength);
 485
 486     // We allocate the backing store first to ensure that garbage collection
 487     // doesn't happen during JSArray initialization.
 488     emitAllocateBasicStorage(initialStorage, storageResult, storagePtr);
 489
 490     // Allocate the cell for the array.
 491     emitAllocateBasicJSObject<JSArray, false>(TrustedImmPtr(m_codeBlock->globalObject()->arrayStructure()), cellResult, storagePtr);
 492
 493     // Store all the necessary info in the ArrayStorage.
 494     storePtr(storageResult, Address(storageResult, ArrayStorage::allocBaseOffset()));
 495     store32(Imm32(length), Address(storageResult, ArrayStorage::lengthOffset()));
 496     store32(Imm32(length), Address(storageResult, ArrayStorage::numValuesInVectorOffset()));
 497
 498     // Store the newly allocated ArrayStorage.
 499     storePtr(storageResult, Address(cellResult, JSArray::storageOffset()));
 500
 501     // Store the vector length and index bias.
 502     store32(Imm32(initialLength), Address(cellResult, JSArray::vectorLengthOffset()));
 503     store32(TrustedImm32(0), Address(cellResult, JSArray::indexBiasOffset()));
 504
 505     // Initialize the sparse value map.
 506     storePtr(TrustedImmPtr(0), Address(cellResult, JSArray::sparseValueMapOffset()));
 507
 508         // Store the values we have.
 509     for (unsigned i = 0; i < length; i++) {
 510 #if USE(JSVALUE64)
 511         loadPtr(Address(callFrameRegister, (valuesRegister + i) * sizeof(Register)), storagePtr);
 512         storePtr(storagePtr, Address(storageResult, ArrayStorage::vectorOffset() + sizeof(WriteBarrier<Unknown>) * i));
 513 #else
 514         load32(Address(callFrameRegister, (valuesRegister + i) * sizeof(Register)), storagePtr);
 515         store32(storagePtr, Address(storageResult, ArrayStorage::vectorOffset() + sizeof(WriteBarrier<Unknown>) * i));
 516         load32(Address(callFrameRegister, (valuesRegister + i) * sizeof(Register) + sizeof(uint32_t)), storagePtr);
 517         store32(storagePtr, Address(storageResult, ArrayStorage::vectorOffset() + sizeof(WriteBarrier<Unknown>) * i + sizeof(uint32_t)));
 518 #endif
 519     }
 520
 521     // Zero out the remaining slots.
 522     for (unsigned i = length; i < initialLength; i++) {
 523 #if USE(JSVALUE64)
 524         storePtr(TrustedImmPtr(0), Address(storageResult, ArrayStorage::vectorOffset() + sizeof(WriteBarrier<Unknown>) * i));
 525 #else
 526         store32(TrustedImm32(static_cast<int>(JSValue::EmptyValueTag)), Address(storageResult, ArrayStorage::vectorOffset() + sizeof(WriteBarrier<Unknown>) * i + OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
 527         store32(TrustedImm32(0), Address(storageResult, ArrayStorage::vectorOffset() + sizeof(WriteBarrier<Unknown>) * i + OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
 528 #endif
 529     }
 530 }
 531
 532 #if ENABLE(VALUE_PROFILER)
 533 inline void JIT::emitValueProfilingSite(ValueProfile* valueProfile)
 534 {
 535     ASSERT(shouldEmitProfiling());
 536     ASSERT(valueProfile);
 537
 538     const RegisterID value = regT0;
 539 #if USE(JSVALUE32_64)
 540     const RegisterID valueTag = regT1;
 541 #endif
 542     const RegisterID scratch = regT3;
 543
 544     if (ValueProfile::numberOfBuckets == 1) {
 545         // We're in a simple configuration: only one bucket, so we can just do a direct
 546         // store.
 547 #if USE(JSVALUE64)
 548         storePtr(value, valueProfile->m_buckets);
 549 #else
 550         EncodedValueDescriptor* descriptor = bitwise_cast<EncodedValueDescriptor*>(valueProfile->m_buckets);
 551         store32(value, &descriptor->asBits.payload);
 552         store32(valueTag, &descriptor->asBits.tag);
 553 #endif
 554         return;
 555     }
 556
 557     if (m_randomGenerator.getUint32() & 1)
 558         add32(TrustedImm32(1), bucketCounterRegister);
 559     else
 560         add32(TrustedImm32(3), bucketCounterRegister);
 561     and32(TrustedImm32(ValueProfile::bucketIndexMask), bucketCounterRegister);
 562     move(TrustedImmPtr(valueProfile->m_buckets), scratch);
 563 #if USE(JSVALUE64)
 564     storePtr(value, BaseIndex(scratch, bucketCounterRegister, TimesEight));
 565 #elif USE(JSVALUE32_64)
 566     store32(value, BaseIndex(scratch, bucketCounterRegister, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
 567     store32(valueTag, BaseIndex(scratch, bucketCounterRegister, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
 568 #endif
 569 }
 570
 571 inline void JIT::emitValueProfilingSite(unsigned bytecodeOffset)
 572 {
 573     if (!shouldEmitProfiling())
 574         return;
 575     emitValueProfilingSite(m_codeBlock->valueProfileForBytecodeOffset(bytecodeOffset));
 576 }
 577
 578 inline void JIT::emitValueProfilingSite()
 579 {
 580     emitValueProfilingSite(m_bytecodeOffset);
 581 }
 582 #endif
 583
 584 #if USE(JSVALUE32_64)
 585
 586 inline void JIT::emitLoadTag(int index, RegisterID tag)
 587 {
 588     RegisterID mappedTag;
 589     if (getMappedTag(index, mappedTag)) {
 590         move(mappedTag, tag);
 591         unmap(tag);
 592         return;
 593     }
 594
 595     if (m_codeBlock->isConstantRegisterIndex(index)) {
 596         move(Imm32(getConstantOperand(index).tag()), tag);
 597         unmap(tag);
 598         return;
 599     }
 600
 601     load32(tagFor(index), tag);
 602     unmap(tag);
 603 }
 604
 605 inline void JIT::emitLoadPayload(int index, RegisterID payload)
 606 {
 607     RegisterID mappedPayload;
 608     if (getMappedPayload(index, mappedPayload)) {
 609         move(mappedPayload, payload);
 610         unmap(payload);
 611         return;
 612     }
 613
 614     if (m_codeBlock->isConstantRegisterIndex(index)) {
 615         move(Imm32(getConstantOperand(index).payload()), payload);
 616         unmap(payload);
 617         return;
 618     }
 619
 620     load32(payloadFor(index), payload);
 621     unmap(payload);
 622 }
 623
 624 inline void JIT::emitLoad(const JSValue& v, RegisterID tag, RegisterID payload)
 625 {
 626     move(Imm32(v.payload()), payload);
 627     move(Imm32(v.tag()), tag);
 628 }
 629
 630 inline void JIT::emitLoad(int index, RegisterID tag, RegisterID payload, RegisterID base)
 631 {
 632     ASSERT(tag != payload);
 633
 634     if (base == callFrameRegister) {
 635         ASSERT(payload != base);
 636         emitLoadPayload(index, payload);
 637         emitLoadTag(index, tag);
 638         return;
 639     }
 640
 641     if (payload == base) { // avoid stomping base
 642         load32(tagFor(index, base), tag);
 643         load32(payloadFor(index, base), payload);
 644         return;
 645     }
 646
 647     load32(payloadFor(index, base), payload);
 648     load32(tagFor(index, base), tag);
 649 }
 650
 651 inline void JIT::emitLoad2(int index1, RegisterID tag1, RegisterID payload1, int index2, RegisterID tag2, RegisterID payload2)
 652 {
 653     if (isMapped(index1)) {
 654         emitLoad(index1, tag1, payload1);
 655         emitLoad(index2, tag2, payload2);
 656         return;
 657     }
 658     emitLoad(index2, tag2, payload2);
 659     emitLoad(index1, tag1, payload1);
 660 }
 661
 662 inline void JIT::emitLoadDouble(int index, FPRegisterID value)
 663 {
 664     if (m_codeBlock->isConstantRegisterIndex(index)) {
 665         WriteBarrier<Unknown>& inConstantPool = m_codeBlock->constantRegister(index);
 666         loadDouble(&inConstantPool, value);
 667     } else
 668         loadDouble(addressFor(index), value);
 669 }
 670
 671 inline void JIT::emitLoadInt32ToDouble(int index, FPRegisterID value)
 672 {
 673     if (m_codeBlock->isConstantRegisterIndex(index)) {
 674         WriteBarrier<Unknown>& inConstantPool = m_codeBlock->constantRegister(index);
 675         char* bytePointer = reinterpret_cast<char*>(&inConstantPool);
 676         convertInt32ToDouble(AbsoluteAddress(bytePointer + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), value);
 677     } else
 678         convertInt32ToDouble(payloadFor(index), value);
 679 }
 680
 681 inline void JIT::emitStore(int index, RegisterID tag, RegisterID payload, RegisterID base)
 682 {
 683     store32(payload, payloadFor(index, base));
 684     store32(tag, tagFor(index, base));
 685 }
 686
 687 inline void JIT::emitStoreInt32(int index, RegisterID payload, bool indexIsInt32)
 688 {
 689     store32(payload, payloadFor(index, callFrameRegister));
 690     if (!indexIsInt32)
 691         store32(TrustedImm32(JSValue::Int32Tag), tagFor(index, callFrameRegister));
 692 }
 693
 694 inline void JIT::emitStoreAndMapInt32(int index, RegisterID tag, RegisterID payload, bool indexIsInt32, size_t opcodeLength)
 695 {
 696     emitStoreInt32(index, payload, indexIsInt32);
 697     map(m_bytecodeOffset + opcodeLength, index, tag, payload);
 698 }
 699
 700 inline void JIT::emitStoreInt32(int index, TrustedImm32 payload, bool indexIsInt32)
 701 {
 702     store32(payload, payloadFor(index, callFrameRegister));
 703     if (!indexIsInt32)
 704         store32(TrustedImm32(JSValue::Int32Tag), tagFor(index, callFrameRegister));
 705 }
 706
 707 inline void JIT::emitStoreCell(int index, RegisterID payload, bool indexIsCell)
 708 {
 709     store32(payload, payloadFor(index, callFrameRegister));
 710     if (!indexIsCell)
 711         store32(TrustedImm32(JSValue::CellTag), tagFor(index, callFrameRegister));
 712 }
 713
 714 inline void JIT::emitStoreBool(int index, RegisterID payload, bool indexIsBool)
 715 {
 716     store32(payload, payloadFor(index, callFrameRegister));
 717     if (!indexIsBool)
 718         store32(TrustedImm32(JSValue::BooleanTag), tagFor(index, callFrameRegister));
 719 }
 720
 721 inline void JIT::emitStoreDouble(int index, FPRegisterID value)
 722 {
 723     storeDouble(value, addressFor(index));
 724 }
 725
 726 inline void JIT::emitStore(int index, const JSValue constant, RegisterID base)
 727 {
 728     store32(Imm32(constant.payload()), payloadFor(index, base));
 729     store32(Imm32(constant.tag()), tagFor(index, base));
 730 }
 731
 732 ALWAYS_INLINE void JIT::emitInitRegister(unsigned dst)
 733 {
 734     emitStore(dst, jsUndefined());
 735 }
 736
 737 inline bool JIT::isLabeled(unsigned bytecodeOffset)
 738 {
 739     for (size_t numberOfJumpTargets = m_codeBlock->numberOfJumpTargets(); m_jumpTargetIndex != numberOfJumpTargets; ++m_jumpTargetIndex) {
 740         unsigned jumpTarget = m_codeBlock->jumpTarget(m_jumpTargetIndex);
 741         if (jumpTarget == bytecodeOffset)
 742             return true;
 743         if (jumpTarget > bytecodeOffset)
 744             return false;
 745     }
 746     return false;
 747 }
 748
 749 inline void JIT::map(unsigned bytecodeOffset, int virtualRegisterIndex, RegisterID tag, RegisterID payload)
 750 {
 751     if (isLabeled(bytecodeOffset))
 752         return;
 753
 754     m_mappedBytecodeOffset = bytecodeOffset;
 755     m_mappedVirtualRegisterIndex = virtualRegisterIndex;
 756     m_mappedTag = tag;
 757     m_mappedPayload = payload;
 758
 759     ASSERT(!canBeOptimized() || m_mappedPayload == regT0);
 760     ASSERT(!canBeOptimized() || m_mappedTag == regT1);
 761 }
 762
 763 inline void JIT::unmap(RegisterID registerID)
 764 {
 765     if (m_mappedTag == registerID)
 766         m_mappedTag = (RegisterID)-1;
 767     else if (m_mappedPayload == registerID)
 768         m_mappedPayload = (RegisterID)-1;
 769 }
 770
 771 inline void JIT::unmap()
 772 {
 773     m_mappedBytecodeOffset = (unsigned)-1;
 774     m_mappedVirtualRegisterIndex = RegisterFile::ReturnPC;
 775     m_mappedTag = (RegisterID)-1;
 776     m_mappedPayload = (RegisterID)-1;
 777 }
 778
 779 inline bool JIT::isMapped(int virtualRegisterIndex)
 780 {
 781     if (m_mappedBytecodeOffset != m_bytecodeOffset)
 782         return false;
 783     if (m_mappedVirtualRegisterIndex != virtualRegisterIndex)
 784         return false;
 785     return true;
 786 }
 787
 788 inline bool JIT::getMappedPayload(int virtualRegisterIndex, RegisterID& payload)
 789 {
 790     if (m_mappedBytecodeOffset != m_bytecodeOffset)
 791         return false;
 792     if (m_mappedVirtualRegisterIndex != virtualRegisterIndex)
 793         return false;
 794     if (m_mappedPayload == (RegisterID)-1)
 795         return false;
 796     payload = m_mappedPayload;
 797     return true;
 798 }
 799
 800 inline bool JIT::getMappedTag(int virtualRegisterIndex, RegisterID& tag)
 801 {
 802     if (m_mappedBytecodeOffset != m_bytecodeOffset)
 803         return false;
 804     if (m_mappedVirtualRegisterIndex != virtualRegisterIndex)
 805         return false;
 806     if (m_mappedTag == (RegisterID)-1)
 807         return false;
 808     tag = m_mappedTag;
 809     return true;
 810 }
 811
 812 inline void JIT::emitJumpSlowCaseIfNotJSCell(int virtualRegisterIndex)
 813 {
 814     if (!m_codeBlock->isKnownNotImmediate(virtualRegisterIndex)) {
 815         if (m_codeBlock->isConstantRegisterIndex(virtualRegisterIndex))
 816             addSlowCase(jump());
 817         else
 818             addSlowCase(emitJumpIfNotJSCell(virtualRegisterIndex));
 819     }
 820 }
 821
 822 inline void JIT::emitJumpSlowCaseIfNotJSCell(int virtualRegisterIndex, RegisterID tag)
 823 {
 824     if (!m_codeBlock->isKnownNotImmediate(virtualRegisterIndex)) {
 825         if (m_codeBlock->isConstantRegisterIndex(virtualRegisterIndex))
 826             addSlowCase(jump());
 827         else
 828             addSlowCase(branch32(NotEqual, tag, TrustedImm32(JSValue::CellTag)));
 829     }
 830 }
 831
 832 ALWAYS_INLINE bool JIT::isOperandConstantImmediateInt(unsigned src)
 833 {
 834     return m_codeBlock->isConstantRegisterIndex(src) && getConstantOperand(src).isInt32();
 835 }
 836
 837 ALWAYS_INLINE bool JIT::getOperandConstantImmediateInt(unsigned op1, unsigned op2, unsigned& op, int32_t& constant)
 838 {
 839     if (isOperandConstantImmediateInt(op1)) {
 840         constant = getConstantOperand(op1).asInt32();
 841         op = op2;
 842         return true;
 843     }
 844
 845     if (isOperandConstantImmediateInt(op2)) {
 846         constant = getConstantOperand(op2).asInt32();
 847         op = op1;
 848         return true;
 849     }
 850
 851     return false;
 852 }
 853
 854 #else // USE(JSVALUE32_64)
 855
 856 ALWAYS_INLINE void JIT::killLastResultRegister()
 857 {
 858     m_lastResultBytecodeRegister = std::numeric_limits<int>::max();
 859 }
 860
 861 // get arg puts an arg from the SF register array into a h/w register
 862 ALWAYS_INLINE void JIT::emitGetVirtualRegister(int src, RegisterID dst)
 863 {
 864     ASSERT(m_bytecodeOffset != (unsigned)-1); // This method should only be called during hot/cold path generation, so that m_bytecodeOffset is set.
 865
 866     // TODO: we want to reuse values that are already in registers if we can - add a register allocator!
 867     if (m_codeBlock->isConstantRegisterIndex(src)) {
 868         JSValue value = m_codeBlock->getConstant(src);
 869         if (!value.isNumber())
 870             move(TrustedImmPtr(JSValue::encode(value)), dst);
 871         else
 872             move(ImmPtr(JSValue::encode(value)), dst);
 873         killLastResultRegister();
 874         return;
 875     }
 876
 877     if (src == m_lastResultBytecodeRegister && m_codeBlock->isTemporaryRegisterIndex(src) && !atJumpTarget()) {
 878         // The argument we want is already stored in eax
 879         if (dst != cachedResultRegister)
 880             move(cachedResultRegister, dst);
 881         killLastResultRegister();
 882         return;
 883     }
 884
 885     loadPtr(Address(callFrameRegister, src * sizeof(Register)), dst);
 886     killLastResultRegister();
 887 }
 888
 889 ALWAYS_INLINE void JIT::emitGetVirtualRegisters(int src1, RegisterID dst1, int src2, RegisterID dst2)
 890 {
 891     if (src2 == m_lastResultBytecodeRegister) {
 892         emitGetVirtualRegister(src2, dst2);
 893         emitGetVirtualRegister(src1, dst1);
 894     } else {
 895         emitGetVirtualRegister(src1, dst1);
 896         emitGetVirtualRegister(src2, dst2);
 897     }
 898 }
 899
 900 ALWAYS_INLINE int32_t JIT::getConstantOperandImmediateInt(unsigned src)
 901 {
 902     return getConstantOperand(src).asInt32();
 903 }
 904
 905 ALWAYS_INLINE bool JIT::isOperandConstantImmediateInt(unsigned src)
 906 {
 907     return m_codeBlock->isConstantRegisterIndex(src) && getConstantOperand(src).isInt32();
 908 }
 909
 910 ALWAYS_INLINE void JIT::emitPutVirtualRegister(unsigned dst, RegisterID from)
 911 {
 912     storePtr(from, Address(callFrameRegister, dst * sizeof(Register)));
 913     m_lastResultBytecodeRegister = (from == cachedResultRegister) ? static_cast<int>(dst) : std::numeric_limits<int>::max();
 914 }
 915
 916 ALWAYS_INLINE void JIT::emitInitRegister(unsigned dst)
 917 {
 918     storePtr(TrustedImmPtr(JSValue::encode(jsUndefined())), Address(callFrameRegister, dst * sizeof(Register)));
 919 }
 920
 921 ALWAYS_INLINE JIT::Jump JIT::emitJumpIfJSCell(RegisterID reg)
 922 {
 923 #if USE(JSVALUE64)
 924     return branchTestPtr(Zero, reg, tagMaskRegister);
 925 #else
 926     return branchTest32(Zero, reg, TrustedImm32(TagMask));
 927 #endif
 928 }
 929
 930 ALWAYS_INLINE JIT::Jump JIT::emitJumpIfBothJSCells(RegisterID reg1, RegisterID reg2, RegisterID scratch)
 931 {
 932     move(reg1, scratch);
 933     orPtr(reg2, scratch);
 934     return emitJumpIfJSCell(scratch);
 935 }
 936
 937 ALWAYS_INLINE void JIT::emitJumpSlowCaseIfJSCell(RegisterID reg)
 938 {
 939     addSlowCase(emitJumpIfJSCell(reg));
 940 }
 941
 942 ALWAYS_INLINE JIT::Jump JIT::emitJumpIfNotJSCell(RegisterID reg)
 943 {
 944 #if USE(JSVALUE64)
 945     return branchTestPtr(NonZero, reg, tagMaskRegister);
 946 #else
 947     return branchTest32(NonZero, reg, TrustedImm32(TagMask));
 948 #endif
 949 }
 950
 951 ALWAYS_INLINE void JIT::emitJumpSlowCaseIfNotJSCell(RegisterID reg)
 952 {
 953     addSlowCase(emitJumpIfNotJSCell(reg));
 954 }
 955
 956 ALWAYS_INLINE void JIT::emitJumpSlowCaseIfNotJSCell(RegisterID reg, int vReg)
 957 {
 958     if (!m_codeBlock->isKnownNotImmediate(vReg))
 959         emitJumpSlowCaseIfNotJSCell(reg);
 960 }
 961
 962 #if USE(JSVALUE64)
 963
 964 inline void JIT::emitLoadDouble(int index, FPRegisterID value)
 965 {
 966     if (m_codeBlock->isConstantRegisterIndex(index)) {
 967         WriteBarrier<Unknown>& inConstantPool = m_codeBlock->constantRegister(index);
 968         loadDouble(&inConstantPool, value);
 969     } else
 970         loadDouble(addressFor(index), value);
 971 }
 972
 973 inline void JIT::emitLoadInt32ToDouble(int index, FPRegisterID value)
 974 {
 975     if (m_codeBlock->isConstantRegisterIndex(index)) {
 976         ASSERT(isOperandConstantImmediateInt(index));
 977         convertInt32ToDouble(Imm32(getConstantOperand(index).asInt32()), value);
 978     } else
 979         convertInt32ToDouble(addressFor(index), value);
 980 }
 981 #endif
 982
 983 ALWAYS_INLINE JIT::Jump JIT::emitJumpIfImmediateInteger(RegisterID reg)
 984 {
 985 #if USE(JSVALUE64)
 986     return branchPtr(AboveOrEqual, reg, tagTypeNumberRegister);
 987 #else
 988     return branchTest32(NonZero, reg, TrustedImm32(TagTypeNumber));
 989 #endif
 990 }
 991
 992 ALWAYS_INLINE JIT::Jump JIT::emitJumpIfNotImmediateInteger(RegisterID reg)
 993 {
 994 #if USE(JSVALUE64)
 995     return branchPtr(Below, reg, tagTypeNumberRegister);
 996 #else
 997     return branchTest32(Zero, reg, TrustedImm32(TagTypeNumber));
 998 #endif
 999 }
1000
1001 ALWAYS_INLINE JIT::Jump JIT::emitJumpIfNotImmediateIntegers(RegisterID reg1, RegisterID reg2, RegisterID scratch)
1002 {
1003     move(reg1, scratch);
1004     andPtr(reg2, scratch);
1005     return emitJumpIfNotImmediateInteger(scratch);
1006 }
1007
1008 ALWAYS_INLINE void JIT::emitJumpSlowCaseIfNotImmediateInteger(RegisterID reg)
1009 {
1010     addSlowCase(emitJumpIfNotImmediateInteger(reg));
1011 }
1012
1013 ALWAYS_INLINE void JIT::emitJumpSlowCaseIfNotImmediateIntegers(RegisterID reg1, RegisterID reg2, RegisterID scratch)
1014 {
1015     addSlowCase(emitJumpIfNotImmediateIntegers(reg1, reg2, scratch));
1016 }
1017
1018 ALWAYS_INLINE void JIT::emitJumpSlowCaseIfNotImmediateNumber(RegisterID reg)
1019 {
1020     addSlowCase(emitJumpIfNotImmediateNumber(reg));
1021 }
1022
1023 #if USE(JSVALUE32_64)
1024 ALWAYS_INLINE void JIT::emitFastArithDeTagImmediate(RegisterID reg)
1025 {
1026     subPtr(TrustedImm32(TagTypeNumber), reg);
1027 }
1028
1029 ALWAYS_INLINE JIT::Jump JIT::emitFastArithDeTagImmediateJumpIfZero(RegisterID reg)
1030 {
1031     return branchSubPtr(Zero, TrustedImm32(TagTypeNumber), reg);
1032 }
1033 #endif
1034
1035 ALWAYS_INLINE void JIT::emitFastArithReTagImmediate(RegisterID src, RegisterID dest)
1036 {
1037 #if USE(JSVALUE64)
1038     emitFastArithIntToImmNoCheck(src, dest);
1039 #else
1040     if (src != dest)
1041         move(src, dest);
1042     addPtr(TrustedImm32(TagTypeNumber), dest);
1043 #endif
1044 }
1045
1046 // operand is int32_t, must have been zero-extended if register is 64-bit.
1047 ALWAYS_INLINE void JIT::emitFastArithIntToImmNoCheck(RegisterID src, RegisterID dest)
1048 {
1049 #if USE(JSVALUE64)
1050     if (src != dest)
1051         move(src, dest);
1052     orPtr(tagTypeNumberRegister, dest);
1053 #else
1054     signExtend32ToPtr(src, dest);
1055     addPtr(dest, dest);
1056     emitFastArithReTagImmediate(dest, dest);
1057 #endif
1058 }
1059
1060 ALWAYS_INLINE void JIT::emitTagAsBoolImmediate(RegisterID reg)
1061 {
1062     or32(TrustedImm32(static_cast<int32_t>(ValueFalse)), reg);
1063 }
1064
1065 #endif // USE(JSVALUE32_64)
1066
1067 } // namespace JSC
1068
1069 #endif // ENABLE(JIT)
1070
1071 #endif