X-Git-Url: https://git.saurik.com/apple/javascriptcore.git/blobdiff_plain/14957cd040308e3eeec43d26bae5d76da13fcd85..HEAD:/jit/JITPropertyAccess.cpp diff --git a/jit/JITPropertyAccess.cpp b/jit/JITPropertyAccess.cpp index ce3d3c1..12390af 100644 --- a/jit/JITPropertyAccess.cpp +++ b/jit/JITPropertyAccess.cpp @@ -1,5 +1,5 @@ /* - * Copyright (C) 2008, 2009 Apple Inc. All rights reserved. + * Copyright (C) 2008, 2009, 2014, 2015 Apple Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions @@ -29,47 +29,58 @@ #include "JIT.h" #include "CodeBlock.h" +#include "DirectArguments.h" +#include "GCAwareJITStubRoutine.h" #include "GetterSetter.h" -#include "JITInlineMethods.h" -#include "JITStubCall.h" +#include "Interpreter.h" +#include "JITInlines.h" #include "JSArray.h" +#include "JSEnvironmentRecord.h" #include "JSFunction.h" -#include "JSPropertyNameIterator.h" -#include "Interpreter.h" #include "LinkBuffer.h" #include "RepatchBuffer.h" #include "ResultType.h" #include "SamplingTool.h" +#include "ScopedArguments.h" +#include "ScopedArgumentsTable.h" +#include -#ifndef NDEBUG -#include -#endif - -using namespace std; namespace JSC { #if USE(JSVALUE64) -JIT::CodePtr JIT::stringGetByValStubGenerator(JSGlobalData* globalData, ExecutablePool* pool) +JIT::CodeRef JIT::stringGetByValStubGenerator(VM* vm) { - JSInterfaceJIT jit; + JSInterfaceJIT jit(vm); JumpList failures; - failures.append(jit.branchPtr(NotEqual, Address(regT0), TrustedImmPtr(globalData->jsStringVPtr))); - failures.append(jit.branchTest32(NonZero, Address(regT0, OBJECT_OFFSETOF(JSString, m_fiberCount)))); + failures.append(JSC::branchStructure(jit, + NotEqual, + Address(regT0, JSCell::structureIDOffset()), + vm->stringStructure.get())); // Load string length to regT2, and start the process of loading the data pointer into regT0 jit.load32(Address(regT0, ThunkHelpers::jsStringLengthOffset()), regT2); jit.loadPtr(Address(regT0, ThunkHelpers::jsStringValueOffset()), regT0); - jit.loadPtr(Address(regT0, ThunkHelpers::stringImplDataOffset()), regT0); - + failures.append(jit.branchTest32(Zero, regT0)); + // Do an unsigned compare to simultaneously filter negative indices as well as indices that are too large failures.append(jit.branch32(AboveOrEqual, regT1, regT2)); // Load the character + JumpList is16Bit; + JumpList cont8Bit; + // Load the string flags + jit.loadPtr(Address(regT0, StringImpl::flagsOffset()), regT2); + jit.loadPtr(Address(regT0, StringImpl::dataOffset()), regT0); + is16Bit.append(jit.branchTest32(Zero, regT2, TrustedImm32(StringImpl::flagIs8Bit()))); + jit.load8(BaseIndex(regT0, regT1, TimesOne, 0), regT0); + cont8Bit.append(jit.jump()); + is16Bit.link(&jit); jit.load16(BaseIndex(regT0, regT1, TimesTwo, 0), regT0); - + cont8Bit.link(&jit); + failures.append(jit.branch32(AboveOrEqual, regT0, TrustedImm32(0x100))); - jit.move(TrustedImmPtr(globalData->smallStrings.singleCharacterStrings()), regT1); + jit.move(TrustedImmPtr(vm->smallStrings.singleCharacterStrings()), regT1); jit.loadPtr(BaseIndex(regT1, regT0, ScalePtr, 0), regT0); jit.ret(); @@ -77,52 +88,129 @@ JIT::CodePtr JIT::stringGetByValStubGenerator(JSGlobalData* globalData, Executab jit.move(TrustedImm32(0), regT0); jit.ret(); - LinkBuffer patchBuffer(*globalData, &jit, pool); - return patchBuffer.finalizeCode().m_code; + LinkBuffer patchBuffer(*vm, jit, GLOBAL_THUNK_ID); + return FINALIZE_CODE(patchBuffer, ("String get_by_val stub")); } void JIT::emit_op_get_by_val(Instruction* currentInstruction) { - unsigned dst = currentInstruction[1].u.operand; - unsigned base = currentInstruction[2].u.operand; - unsigned property = currentInstruction[3].u.operand; - + int dst = currentInstruction[1].u.operand; + int base = currentInstruction[2].u.operand; + int property = currentInstruction[3].u.operand; + ArrayProfile* profile = currentInstruction[4].u.arrayProfile; + emitGetVirtualRegisters(base, regT0, property, regT1); emitJumpSlowCaseIfNotImmediateInteger(regT1); // This is technically incorrect - we're zero-extending an int32. On the hot path this doesn't matter. // We check the value as if it was a uint32 against the m_vectorLength - which will always fail if // number was signed since m_vectorLength is always less than intmax (since the total allocation - // size is always less than 4Gb). As such zero extending wil have been correct (and extending the value - // to 64-bits is necessary since it's used in the address calculation. We zero extend rather than sign + // size is always less than 4Gb). As such zero extending will have been correct (and extending the value + // to 64-bits is necessary since it's used in the address calculation). We zero extend rather than sign // extending since it makes it easier to re-tag the value in the slow case. zeroExtend32ToPtr(regT1, regT1); emitJumpSlowCaseIfNotJSCell(regT0, base); - addSlowCase(branchPtr(NotEqual, Address(regT0), TrustedImmPtr(m_globalData->jsArrayVPtr))); + emitArrayProfilingSiteWithCell(regT0, regT2, profile); + and32(TrustedImm32(IndexingShapeMask), regT2); + + PatchableJump badType; + JumpList slowCases; + + JITArrayMode mode = chooseArrayMode(profile); + switch (mode) { + case JITInt32: + slowCases = emitInt32GetByVal(currentInstruction, badType); + break; + case JITDouble: + slowCases = emitDoubleGetByVal(currentInstruction, badType); + break; + case JITContiguous: + slowCases = emitContiguousGetByVal(currentInstruction, badType); + break; + case JITArrayStorage: + slowCases = emitArrayStorageGetByVal(currentInstruction, badType); + break; + default: + CRASH(); + break; + } + + addSlowCase(badType); + addSlowCase(slowCases); + + Label done = label(); + + if (!ASSERT_DISABLED) { + Jump resultOK = branchTest64(NonZero, regT0); + abortWithReason(JITGetByValResultIsNotEmpty); + resultOK.link(this); + } - loadPtr(Address(regT0, JSArray::storageOffset()), regT2); - addSlowCase(branch32(AboveOrEqual, regT1, Address(regT0, JSArray::vectorLengthOffset()))); + emitValueProfilingSite(); + emitPutVirtualRegister(dst); + + m_byValCompilationInfo.append(ByValCompilationInfo(m_bytecodeOffset, badType, mode, done)); +} - loadPtr(BaseIndex(regT2, regT1, ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), regT0); - addSlowCase(branchTestPtr(Zero, regT0)); +JIT::JumpList JIT::emitDoubleLoad(Instruction*, PatchableJump& badType) +{ + JumpList slowCases; + + badType = patchableBranch32(NotEqual, regT2, TrustedImm32(DoubleShape)); + loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2); + slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, Butterfly::offsetOfPublicLength()))); + loadDouble(BaseIndex(regT2, regT1, TimesEight), fpRegT0); + slowCases.append(branchDouble(DoubleNotEqualOrUnordered, fpRegT0, fpRegT0)); + + return slowCases; +} - emitPutVirtualRegister(dst); +JIT::JumpList JIT::emitContiguousLoad(Instruction*, PatchableJump& badType, IndexingType expectedShape) +{ + JumpList slowCases; + + badType = patchableBranch32(NotEqual, regT2, TrustedImm32(expectedShape)); + loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2); + slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, Butterfly::offsetOfPublicLength()))); + load64(BaseIndex(regT2, regT1, TimesEight), regT0); + slowCases.append(branchTest64(Zero, regT0)); + + return slowCases; +} + +JIT::JumpList JIT::emitArrayStorageLoad(Instruction*, PatchableJump& badType) +{ + JumpList slowCases; + + add32(TrustedImm32(-ArrayStorageShape), regT2, regT3); + badType = patchableBranch32(Above, regT3, TrustedImm32(SlowPutArrayStorageShape - ArrayStorageShape)); + + loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2); + slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, ArrayStorage::vectorLengthOffset()))); + + load64(BaseIndex(regT2, regT1, TimesEight, ArrayStorage::vectorOffset()), regT0); + slowCases.append(branchTest64(Zero, regT0)); + + return slowCases; } void JIT::emitSlow_op_get_by_val(Instruction* currentInstruction, Vector::iterator& iter) { - unsigned dst = currentInstruction[1].u.operand; - unsigned base = currentInstruction[2].u.operand; - unsigned property = currentInstruction[3].u.operand; + int dst = currentInstruction[1].u.operand; + int base = currentInstruction[2].u.operand; + int property = currentInstruction[3].u.operand; + ArrayProfile* profile = currentInstruction[4].u.arrayProfile; linkSlowCase(iter); // property int32 check linkSlowCaseIfNotJSCell(iter, base); // base cell check Jump nonCell = jump(); linkSlowCase(iter); // base array check - Jump notString = branchPtr(NotEqual, Address(regT0), TrustedImmPtr(m_globalData->jsStringVPtr)); - emitNakedCall(m_globalData->getCTIStub(stringGetByValStubGenerator)); - Jump failed = branchTestPtr(Zero, regT0); + Jump notString = branchStructure(NotEqual, + Address(regT0, JSCell::structureIDOffset()), + m_vm->stringStructure.get()); + emitNakedCall(CodeLocationLabel(m_vm->getCTIStub(stringGetByValStubGenerator).code())); + Jump failed = branchTest64(Zero, regT0); emitPutVirtualRegister(dst, regT0); emitJumpSlowToHot(jump(), OPCODE_LENGTH(op_get_by_val)); failed.link(this); @@ -132,349 +220,305 @@ void JIT::emitSlow_op_get_by_val(Instruction* currentInstruction, Vector::iterator& iter) +void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID offset, RegisterID scratch, FinalObjectMode finalObjectMode) { - unsigned dst = currentInstruction[1].u.operand; - unsigned base = currentInstruction[2].u.operand; - unsigned property = currentInstruction[3].u.operand; - - linkSlowCase(iter); - linkSlowCaseIfNotJSCell(iter, base); - linkSlowCase(iter); - linkSlowCase(iter); - - JITStubCall stubCall(this, cti_op_get_by_val); - stubCall.addArgument(base, regT2); - stubCall.addArgument(property, regT2); - stubCall.call(dst); + ASSERT(sizeof(JSValue) == 8); + + if (finalObjectMode == MayBeFinal) { + Jump isInline = branch32(LessThan, offset, TrustedImm32(firstOutOfLineOffset)); + loadPtr(Address(base, JSObject::butterflyOffset()), scratch); + neg32(offset); + Jump done = jump(); + isInline.link(this); + addPtr(TrustedImm32(JSObject::offsetOfInlineStorage() - (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), base, scratch); + done.link(this); + } else { + if (!ASSERT_DISABLED) { + Jump isOutOfLine = branch32(GreaterThanOrEqual, offset, TrustedImm32(firstOutOfLineOffset)); + abortWithReason(JITOffsetIsNotOutOfLine); + isOutOfLine.link(this); + } + loadPtr(Address(base, JSObject::butterflyOffset()), scratch); + neg32(offset); + } + signExtend32ToPtr(offset, offset); + load64(BaseIndex(scratch, offset, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), result); } void JIT::emit_op_put_by_val(Instruction* currentInstruction) { - unsigned base = currentInstruction[1].u.operand; - unsigned property = currentInstruction[2].u.operand; - unsigned value = currentInstruction[3].u.operand; + int base = currentInstruction[1].u.operand; + int property = currentInstruction[2].u.operand; + ArrayProfile* profile = currentInstruction[4].u.arrayProfile; emitGetVirtualRegisters(base, regT0, property, regT1); emitJumpSlowCaseIfNotImmediateInteger(regT1); // See comment in op_get_by_val. zeroExtend32ToPtr(regT1, regT1); emitJumpSlowCaseIfNotJSCell(regT0, base); - addSlowCase(branchPtr(NotEqual, Address(regT0), TrustedImmPtr(m_globalData->jsArrayVPtr))); - addSlowCase(branch32(AboveOrEqual, regT1, Address(regT0, JSArray::vectorLengthOffset()))); - - loadPtr(Address(regT0, JSArray::storageOffset()), regT2); - Jump empty = branchTestPtr(Zero, BaseIndex(regT2, regT1, ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]))); - - Label storeResult(this); - emitGetVirtualRegister(value, regT0); - storePtr(regT0, BaseIndex(regT2, regT1, ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]))); - Jump end = jump(); + emitArrayProfilingSiteWithCell(regT0, regT2, profile); + and32(TrustedImm32(IndexingShapeMask), regT2); - empty.link(this); - add32(TrustedImm32(1), Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector))); - branch32(Below, regT1, Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length))).linkTo(storeResult, this); - - move(regT1, regT0); - add32(TrustedImm32(1), regT0); - store32(regT0, Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length))); - jump().linkTo(storeResult, this); - - end.link(this); -} + PatchableJump badType; + JumpList slowCases; + + JITArrayMode mode = chooseArrayMode(profile); + switch (mode) { + case JITInt32: + slowCases = emitInt32PutByVal(currentInstruction, badType); + break; + case JITDouble: + slowCases = emitDoublePutByVal(currentInstruction, badType); + break; + case JITContiguous: + slowCases = emitContiguousPutByVal(currentInstruction, badType); + break; + case JITArrayStorage: + slowCases = emitArrayStoragePutByVal(currentInstruction, badType); + break; + default: + CRASH(); + break; + } + + addSlowCase(badType); + addSlowCase(slowCases); + + Label done = label(); + + m_byValCompilationInfo.append(ByValCompilationInfo(m_bytecodeOffset, badType, mode, done)); -void JIT::emit_op_put_by_index(Instruction* currentInstruction) -{ - JITStubCall stubCall(this, cti_op_put_by_index); - stubCall.addArgument(currentInstruction[1].u.operand, regT2); - stubCall.addArgument(TrustedImm32(currentInstruction[2].u.operand)); - stubCall.addArgument(currentInstruction[3].u.operand, regT2); - stubCall.call(); } -void JIT::emit_op_put_getter(Instruction* currentInstruction) +JIT::JumpList JIT::emitGenericContiguousPutByVal(Instruction* currentInstruction, PatchableJump& badType, IndexingType indexingShape) { - JITStubCall stubCall(this, cti_op_put_getter); - stubCall.addArgument(currentInstruction[1].u.operand, regT2); - stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand))); - stubCall.addArgument(currentInstruction[3].u.operand, regT2); - stubCall.call(); -} + int value = currentInstruction[3].u.operand; + ArrayProfile* profile = currentInstruction[4].u.arrayProfile; + + JumpList slowCases; -void JIT::emit_op_put_setter(Instruction* currentInstruction) -{ - JITStubCall stubCall(this, cti_op_put_setter); - stubCall.addArgument(currentInstruction[1].u.operand, regT2); - stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand))); - stubCall.addArgument(currentInstruction[3].u.operand, regT2); - stubCall.call(); + badType = patchableBranch32(NotEqual, regT2, TrustedImm32(indexingShape)); + + loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2); + Jump outOfBounds = branch32(AboveOrEqual, regT1, Address(regT2, Butterfly::offsetOfPublicLength())); + + Label storeResult = label(); + emitGetVirtualRegister(value, regT3); + switch (indexingShape) { + case Int32Shape: + slowCases.append(emitJumpIfNotImmediateInteger(regT3)); + store64(regT3, BaseIndex(regT2, regT1, TimesEight)); + break; + case DoubleShape: { + Jump notInt = emitJumpIfNotImmediateInteger(regT3); + convertInt32ToDouble(regT3, fpRegT0); + Jump ready = jump(); + notInt.link(this); + add64(tagTypeNumberRegister, regT3); + move64ToDouble(regT3, fpRegT0); + slowCases.append(branchDouble(DoubleNotEqualOrUnordered, fpRegT0, fpRegT0)); + ready.link(this); + storeDouble(fpRegT0, BaseIndex(regT2, regT1, TimesEight)); + break; + } + case ContiguousShape: + store64(regT3, BaseIndex(regT2, regT1, TimesEight)); + emitWriteBarrier(currentInstruction[1].u.operand, value, ShouldFilterValue); + break; + default: + CRASH(); + break; + } + + Jump done = jump(); + outOfBounds.link(this); + + slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, Butterfly::offsetOfVectorLength()))); + + emitArrayProfileStoreToHoleSpecialCase(profile); + + add32(TrustedImm32(1), regT1, regT3); + store32(regT3, Address(regT2, Butterfly::offsetOfPublicLength())); + jump().linkTo(storeResult, this); + + done.link(this); + + return slowCases; } -void JIT::emit_op_del_by_id(Instruction* currentInstruction) +JIT::JumpList JIT::emitArrayStoragePutByVal(Instruction* currentInstruction, PatchableJump& badType) { - JITStubCall stubCall(this, cti_op_del_by_id); - stubCall.addArgument(currentInstruction[2].u.operand, regT2); - stubCall.addArgument(TrustedImmPtr(&m_codeBlock->identifier(currentInstruction[3].u.operand))); - stubCall.call(currentInstruction[1].u.operand); -} + int value = currentInstruction[3].u.operand; + ArrayProfile* profile = currentInstruction[4].u.arrayProfile; + + JumpList slowCases; + + badType = patchableBranch32(NotEqual, regT2, TrustedImm32(ArrayStorageShape)); + loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2); + slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, ArrayStorage::vectorLengthOffset()))); + Jump empty = branchTest64(Zero, BaseIndex(regT2, regT1, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]))); -#if !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) + Label storeResult(this); + emitGetVirtualRegister(value, regT3); + store64(regT3, BaseIndex(regT2, regT1, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]))); + emitWriteBarrier(currentInstruction[1].u.operand, value, ShouldFilterValue); + Jump end = jump(); + + empty.link(this); + emitArrayProfileStoreToHoleSpecialCase(profile); + add32(TrustedImm32(1), Address(regT2, ArrayStorage::numValuesInVectorOffset())); + branch32(Below, regT1, Address(regT2, ArrayStorage::lengthOffset())).linkTo(storeResult, this); -/* ------------------------------ BEGIN: !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */ + add32(TrustedImm32(1), regT1); + store32(regT1, Address(regT2, ArrayStorage::lengthOffset())); + sub32(TrustedImm32(1), regT1); + jump().linkTo(storeResult, this); -// Treat these as nops - the call will be handed as a regular get_by_id/op_call pair. -void JIT::emit_op_method_check(Instruction*) {} -void JIT::emitSlow_op_method_check(Instruction*, Vector::iterator&) { ASSERT_NOT_REACHED(); } -#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS) -#error "JIT_OPTIMIZE_METHOD_CALLS requires JIT_OPTIMIZE_PROPERTY_ACCESS" -#endif + end.link(this); + + return slowCases; +} -void JIT::emit_op_get_by_id(Instruction* currentInstruction) +void JIT::emitSlow_op_put_by_val(Instruction* currentInstruction, Vector::iterator& iter) { - unsigned resultVReg = currentInstruction[1].u.operand; - unsigned baseVReg = currentInstruction[2].u.operand; - Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand)); + int base = currentInstruction[1].u.operand; + int property = currentInstruction[2].u.operand; + int value = currentInstruction[3].u.operand; + ArrayProfile* profile = currentInstruction[4].u.arrayProfile; - emitGetVirtualRegister(baseVReg, regT0); - JITStubCall stubCall(this, cti_op_get_by_id_generic); - stubCall.addArgument(regT0); - stubCall.addArgument(TrustedImmPtr(ident)); - stubCall.call(resultVReg); + linkSlowCase(iter); // property int32 check + linkSlowCaseIfNotJSCell(iter, base); // base cell check + linkSlowCase(iter); // base not array check + + JITArrayMode mode = chooseArrayMode(profile); + switch (mode) { + case JITInt32: + case JITDouble: + linkSlowCase(iter); // value type check + break; + default: + break; + } + + Jump skipProfiling = jump(); + linkSlowCase(iter); // out of bounds + emitArrayProfileOutOfBoundsSpecialCase(profile); + skipProfiling.link(this); + + Label slowPath = label(); - m_propertyAccessInstructionIndex++; + emitGetVirtualRegister(property, regT1); + emitGetVirtualRegister(value, regT2); + bool isDirect = m_interpreter->getOpcodeID(currentInstruction->u.opcode) == op_put_by_val_direct; + Call call = callOperation(isDirect ? operationDirectPutByVal : operationPutByVal, regT0, regT1, regT2, profile); + + m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath; + m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call; + m_byValInstructionIndex++; } -void JIT::emitSlow_op_get_by_id(Instruction*, Vector::iterator&) +void JIT::emit_op_put_by_index(Instruction* currentInstruction) { - ASSERT_NOT_REACHED(); + emitGetVirtualRegister(currentInstruction[1].u.operand, regT0); + emitGetVirtualRegister(currentInstruction[3].u.operand, regT1); + callOperation(operationPutByIndex, regT0, currentInstruction[2].u.operand, regT1); } -void JIT::emit_op_put_by_id(Instruction* currentInstruction) +void JIT::emit_op_put_getter_by_id(Instruction* currentInstruction) { - unsigned baseVReg = currentInstruction[1].u.operand; - Identifier* ident = &(m_codeBlock->identifier(currentInstruction[2].u.operand)); - unsigned valueVReg = currentInstruction[3].u.operand; - unsigned direct = currentInstruction[8].u.operand; - - emitGetVirtualRegisters(baseVReg, regT0, valueVReg, regT1); - - JITStubCall stubCall(this, direct ? cti_op_put_by_id_direct_generic, cti_op_put_by_id_generic); - stubCall.addArgument(regT0); - stubCall.addArgument(TrustedImmPtr(ident)); - stubCall.addArgument(regT1); - stubCall.call(); - - m_propertyAccessInstructionIndex++; + emitGetVirtualRegister(currentInstruction[1].u.operand, regT0); + emitGetVirtualRegister(currentInstruction[3].u.operand, regT1); + callOperation(operationPutGetterById, regT0, &m_codeBlock->identifier(currentInstruction[2].u.operand), regT1); } -void JIT::emitSlow_op_put_by_id(Instruction*, Vector::iterator&) +void JIT::emit_op_put_setter_by_id(Instruction* currentInstruction) { - ASSERT_NOT_REACHED(); + emitGetVirtualRegister(currentInstruction[1].u.operand, regT0); + emitGetVirtualRegister(currentInstruction[3].u.operand, regT1); + callOperation(operationPutSetterById, regT0, &m_codeBlock->identifier(currentInstruction[2].u.operand), regT1); } -#else // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) - -/* ------------------------------ BEGIN: ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */ - -#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS) - -void JIT::emit_op_method_check(Instruction* currentInstruction) +void JIT::emit_op_put_getter_setter(Instruction* currentInstruction) { - // Assert that the following instruction is a get_by_id. - ASSERT(m_interpreter->getOpcodeID((currentInstruction + OPCODE_LENGTH(op_method_check))->u.opcode) == op_get_by_id); - - currentInstruction += OPCODE_LENGTH(op_method_check); - unsigned resultVReg = currentInstruction[1].u.operand; - unsigned baseVReg = currentInstruction[2].u.operand; - Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand)); - - emitGetVirtualRegister(baseVReg, regT0); - - // Do the method check - check the object & its prototype's structure inline (this is the common case). - m_methodCallCompilationInfo.append(MethodCallCompilationInfo(m_propertyAccessInstructionIndex)); - MethodCallCompilationInfo& info = m_methodCallCompilationInfo.last(); - - Jump notCell = emitJumpIfNotJSCell(regT0); - - BEGIN_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck); - - Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, JSCell::structureOffset()), info.structureToCompare, TrustedImmPtr(reinterpret_cast(patchGetByIdDefaultStructure))); - DataLabelPtr protoStructureToCompare, protoObj = moveWithPatch(TrustedImmPtr(0), regT1); - Jump protoStructureCheck = branchPtrWithPatch(NotEqual, Address(regT1, JSCell::structureOffset()), protoStructureToCompare, TrustedImmPtr(reinterpret_cast(patchGetByIdDefaultStructure))); - - // This will be relinked to load the function without doing a load. - DataLabelPtr putFunction = moveWithPatch(TrustedImmPtr(0), regT0); - - END_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck); - - Jump match = jump(); - - ASSERT_JIT_OFFSET_UNUSED(protoObj, differenceBetween(info.structureToCompare, protoObj), patchOffsetMethodCheckProtoObj); - ASSERT_JIT_OFFSET(differenceBetween(info.structureToCompare, protoStructureToCompare), patchOffsetMethodCheckProtoStruct); - ASSERT_JIT_OFFSET_UNUSED(putFunction, differenceBetween(info.structureToCompare, putFunction), patchOffsetMethodCheckPutFunction); - - // Link the failure cases here. - notCell.link(this); - structureCheck.link(this); - protoStructureCheck.link(this); - - // Do a regular(ish) get_by_id (the slow case will be link to - // cti_op_get_by_id_method_check instead of cti_op_get_by_id. - compileGetByIdHotPath(resultVReg, baseVReg, ident, m_propertyAccessInstructionIndex++); - - match.link(this); - emitPutVirtualRegister(resultVReg); - - // We've already generated the following get_by_id, so make sure it's skipped over. - m_bytecodeOffset += OPCODE_LENGTH(op_get_by_id); + emitGetVirtualRegister(currentInstruction[1].u.operand, regT0); + emitGetVirtualRegister(currentInstruction[3].u.operand, regT1); + emitGetVirtualRegister(currentInstruction[4].u.operand, regT2); + callOperation(operationPutGetterSetter, regT0, &m_codeBlock->identifier(currentInstruction[2].u.operand), regT1, regT2); } -void JIT::emitSlow_op_method_check(Instruction* currentInstruction, Vector::iterator& iter) +void JIT::emit_op_del_by_id(Instruction* currentInstruction) { - currentInstruction += OPCODE_LENGTH(op_method_check); - unsigned resultVReg = currentInstruction[1].u.operand; - unsigned baseVReg = currentInstruction[2].u.operand; - Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand)); - - compileGetByIdSlowCase(resultVReg, baseVReg, ident, iter, true); - - // We've already generated the following get_by_id, so make sure it's skipped over. - m_bytecodeOffset += OPCODE_LENGTH(op_get_by_id); + int dst = currentInstruction[1].u.operand; + int base = currentInstruction[2].u.operand; + int property = currentInstruction[3].u.operand; + emitGetVirtualRegister(base, regT0); + callOperation(operationDeleteById, dst, regT0, &m_codeBlock->identifier(property)); } -#else //!ENABLE(JIT_OPTIMIZE_METHOD_CALLS) - -// Treat these as nops - the call will be handed as a regular get_by_id/op_call pair. -void JIT::emit_op_method_check(Instruction*) {} -void JIT::emitSlow_op_method_check(Instruction*, Vector::iterator&) { ASSERT_NOT_REACHED(); } - -#endif - void JIT::emit_op_get_by_id(Instruction* currentInstruction) { - unsigned resultVReg = currentInstruction[1].u.operand; - unsigned baseVReg = currentInstruction[2].u.operand; - Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand)); + int resultVReg = currentInstruction[1].u.operand; + int baseVReg = currentInstruction[2].u.operand; + const Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand)); emitGetVirtualRegister(baseVReg, regT0); - compileGetByIdHotPath(resultVReg, baseVReg, ident, m_propertyAccessInstructionIndex++); - emitPutVirtualRegister(resultVReg); -} - -void JIT::compileGetByIdHotPath(int, int baseVReg, Identifier*, unsigned propertyAccessInstructionIndex) -{ - // As for put_by_id, get_by_id requires the offset of the Structure and the offset of the access to be patched. - // Additionally, for get_by_id we need patch the offset of the branch to the slow case (we patch this to jump - // to array-length / prototype access tranpolines, and finally we also the the property-map access offset as a label - // to jump back to if one of these trampolies finds a match. - + emitJumpSlowCaseIfNotJSCell(regT0, baseVReg); + + if (*ident == m_vm->propertyNames->length && shouldEmitProfiling()) + emitArrayProfilingSiteForBytecodeIndexWithCell(regT0, regT1, m_bytecodeOffset); - BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath); - - Label hotPathBegin(this); - m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].hotPathBegin = hotPathBegin; - - DataLabelPtr structureToCompare; - Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, JSCell::structureOffset()), structureToCompare, TrustedImmPtr(reinterpret_cast(patchGetByIdDefaultStructure))); - addSlowCase(structureCheck); - ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureToCompare), patchOffsetGetByIdStructure); - ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureCheck), patchOffsetGetByIdBranchToSlowCase) - - loadPtr(Address(regT0, OBJECT_OFFSETOF(JSObject, m_propertyStorage)), regT0); - DataLabelCompact displacementLabel = loadPtrWithCompactAddressOffsetPatch(Address(regT0, patchGetByIdDefaultOffset), regT0); - ASSERT_JIT_OFFSET_UNUSED(displacementLabel, differenceBetween(hotPathBegin, displacementLabel), patchOffsetGetByIdPropertyMapOffset); - - Label putResult(this); - - END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath); + JITGetByIdGenerator gen( + m_codeBlock, CodeOrigin(m_bytecodeOffset), RegisterSet::specialRegisters(), + JSValueRegs(regT0), JSValueRegs(regT0), DontSpill); + gen.generateFastPath(*this); + addSlowCase(gen.slowPathJump()); + m_getByIds.append(gen); - ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, putResult), patchOffsetGetByIdPutResult); + emitValueProfilingSite(); + emitPutVirtualRegister(resultVReg); + assertStackPointerOffset(); } void JIT::emitSlow_op_get_by_id(Instruction* currentInstruction, Vector::iterator& iter) { - unsigned resultVReg = currentInstruction[1].u.operand; - unsigned baseVReg = currentInstruction[2].u.operand; - Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand)); - - compileGetByIdSlowCase(resultVReg, baseVReg, ident, iter, false); -} - -void JIT::compileGetByIdSlowCase(int resultVReg, int baseVReg, Identifier* ident, Vector::iterator& iter, bool isMethodCheck) -{ - // As for the hot path of get_by_id, above, we ensure that we can use an architecture specific offset - // so that we only need track one pointer into the slow case code - we track a pointer to the location - // of the call (which we can use to look up the patch information), but should a array-length or - // prototype access trampoline fail we want to bail out back to here. To do so we can subtract back - // the distance from the call to the head of the slow case. + int resultVReg = currentInstruction[1].u.operand; + int baseVReg = currentInstruction[2].u.operand; + const Identifier* ident = &(m_codeBlock->identifier(currentInstruction[3].u.operand)); linkSlowCaseIfNotJSCell(iter, baseVReg); linkSlowCase(iter); - BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase); - -#ifndef NDEBUG - Label coldPathBegin(this); -#endif - JITStubCall stubCall(this, isMethodCheck ? cti_op_get_by_id_method_check : cti_op_get_by_id); - stubCall.addArgument(regT0); - stubCall.addArgument(TrustedImmPtr(ident)); - Call call = stubCall.call(resultVReg); - - END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase); - - ASSERT_JIT_OFFSET(differenceBetween(coldPathBegin, call), patchOffsetGetByIdSlowCaseCall); + JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++]; + + Label coldPathBegin = label(); + + Call call = callOperation(WithProfile, operationGetByIdOptimize, resultVReg, gen.stubInfo(), regT0, ident->impl()); - // Track the location of the call; this will be used to recover patch information. - m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].callReturnLocation = call; - m_propertyAccessInstructionIndex++; + gen.reportSlowPathCall(coldPathBegin, call); } void JIT::emit_op_put_by_id(Instruction* currentInstruction) { - unsigned baseVReg = currentInstruction[1].u.operand; - unsigned valueVReg = currentInstruction[3].u.operand; + int baseVReg = currentInstruction[1].u.operand; + int valueVReg = currentInstruction[3].u.operand; + unsigned direct = currentInstruction[8].u.operand; - unsigned propertyAccessInstructionIndex = m_propertyAccessInstructionIndex++; + emitWriteBarrier(baseVReg, valueVReg, ShouldFilterBase); // In order to be able to patch both the Structure, and the object offset, we store one pointer, // to just after the arguments have been loaded into registers 'hotPathBegin', and we generate code @@ -485,549 +529,886 @@ void JIT::emit_op_put_by_id(Instruction* currentInstruction) // Jump to a slow case if either the base object is an immediate, or if the Structure does not match. emitJumpSlowCaseIfNotJSCell(regT0, baseVReg); - BEGIN_UNINTERRUPTED_SEQUENCE(sequencePutById); - - Label hotPathBegin(this); - m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].hotPathBegin = hotPathBegin; - - // It is important that the following instruction plants a 32bit immediate, in order that it can be patched over. - DataLabelPtr structureToCompare; - addSlowCase(branchPtrWithPatch(NotEqual, Address(regT0, JSCell::structureOffset()), structureToCompare, TrustedImmPtr(reinterpret_cast(patchGetByIdDefaultStructure)))); - ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureToCompare), patchOffsetPutByIdStructure); - - loadPtr(Address(regT0, OBJECT_OFFSETOF(JSObject, m_propertyStorage)), regT0); - DataLabel32 displacementLabel = storePtrWithAddressOffsetPatch(regT1, Address(regT0, patchPutByIdDefaultOffset)); - - END_UNINTERRUPTED_SEQUENCE(sequencePutById); - - ASSERT_JIT_OFFSET_UNUSED(displacementLabel, differenceBetween(hotPathBegin, displacementLabel), patchOffsetPutByIdPropertyMapOffset); + JITPutByIdGenerator gen( + m_codeBlock, CodeOrigin(m_bytecodeOffset), RegisterSet::specialRegisters(), + JSValueRegs(regT0), JSValueRegs(regT1), regT2, DontSpill, m_codeBlock->ecmaMode(), + direct ? Direct : NotDirect); + + gen.generateFastPath(*this); + addSlowCase(gen.slowPathJump()); + + m_putByIds.append(gen); } void JIT::emitSlow_op_put_by_id(Instruction* currentInstruction, Vector::iterator& iter) { - unsigned baseVReg = currentInstruction[1].u.operand; - Identifier* ident = &(m_codeBlock->identifier(currentInstruction[2].u.operand)); - unsigned direct = currentInstruction[8].u.operand; - - unsigned propertyAccessInstructionIndex = m_propertyAccessInstructionIndex++; + int baseVReg = currentInstruction[1].u.operand; + const Identifier* ident = &(m_codeBlock->identifier(currentInstruction[2].u.operand)); linkSlowCaseIfNotJSCell(iter, baseVReg); linkSlowCase(iter); - JITStubCall stubCall(this, direct ? cti_op_put_by_id_direct : cti_op_put_by_id); - stubCall.addArgument(regT0); - stubCall.addArgument(TrustedImmPtr(ident)); - stubCall.addArgument(regT1); - Call call = stubCall.call(); + Label coldPathBegin(this); + + JITPutByIdGenerator& gen = m_putByIds[m_putByIdIndex++]; + + Call call = callOperation( + gen.slowPathFunction(), gen.stubInfo(), regT1, regT0, ident->impl()); - // Track the location of the call; this will be used to recover patch information. - m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].callReturnLocation = call; + gen.reportSlowPathCall(coldPathBegin, call); } // Compile a store into an object's property storage. May overwrite the // value in objectReg. -void JIT::compilePutDirectOffset(RegisterID base, RegisterID value, Structure* structure, size_t cachedOffset) +void JIT::compilePutDirectOffset(RegisterID base, RegisterID value, PropertyOffset cachedOffset) { - int offset = cachedOffset * sizeof(JSValue); - if (structure->isUsingInlineStorage()) - offset += JSObject::offsetOfInlineStorage(); - else - loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_propertyStorage)), base); - storePtr(value, Address(base, offset)); + if (isInlineOffset(cachedOffset)) { + store64(value, Address(base, JSObject::offsetOfInlineStorage() + sizeof(JSValue) * offsetInInlineStorage(cachedOffset))); + return; + } + + loadPtr(Address(base, JSObject::butterflyOffset()), base); + store64(value, Address(base, sizeof(JSValue) * offsetInButterfly(cachedOffset))); } // Compile a load from an object's property storage. May overwrite base. -void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, Structure* structure, size_t cachedOffset) +void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, PropertyOffset cachedOffset) { - int offset = cachedOffset * sizeof(JSValue); - if (structure->isUsingInlineStorage()) { - offset += JSObject::offsetOfInlineStorage(); - loadPtr(Address(base, offset), result); - } else { - loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_propertyStorage)), result); - loadPtr(Address(result, offset), result); + if (isInlineOffset(cachedOffset)) { + load64(Address(base, JSObject::offsetOfInlineStorage() + sizeof(JSValue) * offsetInInlineStorage(cachedOffset)), result); + return; } + + loadPtr(Address(base, JSObject::butterflyOffset()), result); + load64(Address(result, sizeof(JSValue) * offsetInButterfly(cachedOffset)), result); } -void JIT::compileGetDirectOffset(JSObject* base, RegisterID result, size_t cachedOffset) -{ - loadPtr(static_cast(&base->m_propertyStorage[cachedOffset]), result); -} - -void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress, bool direct) +void JIT::compileGetDirectOffset(JSObject* base, RegisterID result, PropertyOffset cachedOffset) { - JumpList failureCases; - // Check eax is an object of the right Structure. - failureCases.append(emitJumpIfNotJSCell(regT0)); - failureCases.append(branchPtr(NotEqual, Address(regT0, JSCell::structureOffset()), TrustedImmPtr(oldStructure))); - testPrototype(oldStructure->storedPrototype(), failureCases); - - // ecx = baseObject->m_structure - if (!direct) { - for (WriteBarrier* it = chain->head(); *it; ++it) - testPrototype((*it)->storedPrototype(), failureCases); - } - - Call callTarget; - - // emit a call only if storage realloc is needed - bool willNeedStorageRealloc = oldStructure->propertyStorageCapacity() != newStructure->propertyStorageCapacity(); - if (willNeedStorageRealloc) { - // This trampoline was called to like a JIT stub; before we can can call again we need to - // remove the return address from the stack, to prevent the stack from becoming misaligned. - preserveReturnAddressAfterCall(regT3); - - JITStubCall stubCall(this, cti_op_put_by_id_transition_realloc); - stubCall.skipArgument(); // base - stubCall.skipArgument(); // ident - stubCall.skipArgument(); // value - stubCall.addArgument(TrustedImm32(oldStructure->propertyStorageCapacity())); - stubCall.addArgument(TrustedImm32(newStructure->propertyStorageCapacity())); - stubCall.call(regT0); - emitGetJITStubArg(2, regT1); - - restoreReturnAddressBeforeReturn(regT3); + if (isInlineOffset(cachedOffset)) { + load64(base->locationForOffset(cachedOffset), result); + return; } - - storePtrWithWriteBarrier(TrustedImmPtr(newStructure), regT0, Address(regT0, JSCell::structureOffset())); - - // write the value - compilePutDirectOffset(regT0, regT1, newStructure, cachedOffset); - - ret(); - ASSERT(!failureCases.empty()); - failureCases.link(this); - restoreArgumentReferenceForTrampoline(); - Call failureCall = tailRecursiveCall(); + loadPtr(base->butterflyAddress(), result); + load64(Address(result, offsetInButterfly(cachedOffset) * sizeof(WriteBarrier)), result); +} - LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock->executablePool()); +void JIT::emitVarInjectionCheck(bool needsVarInjectionChecks) +{ + if (!needsVarInjectionChecks) + return; + addSlowCase(branch8(Equal, AbsoluteAddress(m_codeBlock->globalObject()->varInjectionWatchpoint()->addressOfState()), TrustedImm32(IsInvalidated))); +} - patchBuffer.link(failureCall, FunctionPtr(direct ? cti_op_put_by_id_direct_fail : cti_op_put_by_id_fail)); +void JIT::emitResolveClosure(int dst, int scope, bool needsVarInjectionChecks, unsigned depth) +{ + emitVarInjectionCheck(needsVarInjectionChecks); + emitGetVirtualRegister(scope, regT0); + for (unsigned i = 0; i < depth; ++i) + loadPtr(Address(regT0, JSScope::offsetOfNext()), regT0); + emitPutVirtualRegister(dst); +} - if (willNeedStorageRealloc) { - ASSERT(m_calls.size() == 1); - patchBuffer.link(m_calls[0].from, FunctionPtr(cti_op_put_by_id_transition_realloc)); +void JIT::emit_op_resolve_scope(Instruction* currentInstruction) +{ + int dst = currentInstruction[1].u.operand; + int scope = currentInstruction[2].u.operand; + ResolveType resolveType = static_cast(currentInstruction[4].u.operand); + unsigned depth = currentInstruction[5].u.operand; + + switch (resolveType) { + case GlobalProperty: + case GlobalVar: + case GlobalPropertyWithVarInjectionChecks: + case GlobalVarWithVarInjectionChecks: + emitVarInjectionCheck(needsVarInjectionChecks(resolveType)); + move(TrustedImmPtr(m_codeBlock->globalObject()), regT0); + emitPutVirtualRegister(dst); + break; + case ClosureVar: + case ClosureVarWithVarInjectionChecks: + emitResolveClosure(dst, scope, needsVarInjectionChecks(resolveType), depth); + break; + case Dynamic: + addSlowCase(jump()); + break; + case LocalClosureVar: + RELEASE_ASSERT_NOT_REACHED(); } - - CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum(); - stubInfo->stubRoutine = entryLabel; - RepatchBuffer repatchBuffer(m_codeBlock); - repatchBuffer.relinkCallerToTrampoline(returnAddress, entryLabel); } -void JIT::patchGetByIdSelf(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress) +void JIT::emitSlow_op_resolve_scope(Instruction* currentInstruction, Vector::iterator& iter) { - RepatchBuffer repatchBuffer(codeBlock); - - // We don't want to patch more than once - in future go to cti_op_get_by_id_generic. - // Should probably go to cti_op_get_by_id_fail, but that doesn't do anything interesting right now. - repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_self_fail)); + int dst = currentInstruction[1].u.operand; + ResolveType resolveType = static_cast(currentInstruction[4].u.operand); - int offset = sizeof(JSValue) * cachedOffset; + if (resolveType == GlobalProperty || resolveType == GlobalVar || resolveType == ClosureVar) + return; - // Patch the offset into the propoerty map to load from, then patch the Structure to look for. - repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetGetByIdStructure), structure); - repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelCompactAtOffset(patchOffsetGetByIdPropertyMapOffset), offset); + linkSlowCase(iter); + int32_t scope = currentInstruction[2].u.operand; + int32_t identifierIndex = currentInstruction[3].u.operand; + callOperation(operationResolveScope, dst, scope, identifierIndex); } -void JIT::patchPutByIdReplace(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress, bool direct) +void JIT::emitLoadWithStructureCheck(int scope, Structure** structureSlot) { - RepatchBuffer repatchBuffer(codeBlock); - - // We don't want to patch more than once - in future go to cti_op_put_by_id_generic. - // Should probably go to cti_op_put_by_id_fail, but that doesn't do anything interesting right now. - repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(direct ? cti_op_put_by_id_direct_generic : cti_op_put_by_id_generic)); - - int offset = sizeof(JSValue) * cachedOffset; - - // Patch the offset into the propoerty map to load from, then patch the Structure to look for. - repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetPutByIdStructure), structure); - repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetPutByIdPropertyMapOffset), offset); + emitGetVirtualRegister(scope, regT0); + loadPtr(structureSlot, regT1); + addSlowCase(branchTestPtr(Zero, regT1)); + load32(Address(regT1, Structure::structureIDOffset()), regT1); + addSlowCase(branch32(NotEqual, Address(regT0, JSCell::structureIDOffset()), regT1)); } -void JIT::privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress) +void JIT::emitGetGlobalProperty(uintptr_t* operandSlot) { - StructureStubInfo* stubInfo = &m_codeBlock->getStubInfo(returnAddress); - - // Check eax is an array - Jump failureCases1 = branchPtr(NotEqual, Address(regT0), TrustedImmPtr(m_globalData->jsArrayVPtr)); - - // Checks out okay! - get the length from the storage - loadPtr(Address(regT0, JSArray::storageOffset()), regT3); - load32(Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_length)), regT2); - Jump failureCases2 = branch32(LessThan, regT2, TrustedImm32(0)); - - emitFastArithIntToImmNoCheck(regT2, regT0); - Jump success = jump(); + load32(operandSlot, regT1); + compileGetDirectOffset(regT0, regT0, regT1, regT2, KnownNotFinal); +} - LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock->executablePool()); +void JIT::emitGetGlobalVar(uintptr_t operand) +{ + loadPtr(reinterpret_cast(operand), regT0); +} - // Use the patch information to link the failure cases back to the original slow case routine. - CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall); - patchBuffer.link(failureCases1, slowCaseBegin); - patchBuffer.link(failureCases2, slowCaseBegin); +void JIT::emitGetClosureVar(int scope, uintptr_t operand) +{ + emitGetVirtualRegister(scope, regT0); + loadPtr(Address(regT0, JSEnvironmentRecord::offsetOfVariables() + operand * sizeof(Register)), regT0); +} - // On success return back to the hot patch code, at a point it will perform the store to dest for us. - patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult)); +void JIT::emit_op_get_from_scope(Instruction* currentInstruction) +{ + int dst = currentInstruction[1].u.operand; + int scope = currentInstruction[2].u.operand; + ResolveType resolveType = ResolveModeAndType(currentInstruction[4].u.operand).type(); + Structure** structureSlot = currentInstruction[5].u.structure.slot(); + uintptr_t* operandSlot = reinterpret_cast(¤tInstruction[6].u.pointer); + + switch (resolveType) { + case GlobalProperty: + case GlobalPropertyWithVarInjectionChecks: + emitLoadWithStructureCheck(scope, structureSlot); // Structure check covers var injection. + emitGetGlobalProperty(operandSlot); + break; + case GlobalVar: + case GlobalVarWithVarInjectionChecks: + emitVarInjectionCheck(needsVarInjectionChecks(resolveType)); + emitGetGlobalVar(*operandSlot); + break; + case ClosureVar: + case ClosureVarWithVarInjectionChecks: + emitVarInjectionCheck(needsVarInjectionChecks(resolveType)); + emitGetClosureVar(scope, *operandSlot); + break; + case Dynamic: + addSlowCase(jump()); + break; + case LocalClosureVar: + RELEASE_ASSERT_NOT_REACHED(); + } + emitPutVirtualRegister(dst); + emitValueProfilingSite(); +} - // Track the stub we have created so that it will be deleted later. - CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum(); - stubInfo->stubRoutine = entryLabel; +void JIT::emitSlow_op_get_from_scope(Instruction* currentInstruction, Vector::iterator& iter) +{ + int dst = currentInstruction[1].u.operand; + ResolveType resolveType = ResolveModeAndType(currentInstruction[4].u.operand).type(); - // Finally patch the jump to slow case back in the hot path to jump here instead. - CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase); - RepatchBuffer repatchBuffer(m_codeBlock); - repatchBuffer.relink(jumpLocation, entryLabel); + if (resolveType == GlobalVar || resolveType == ClosureVar) + return; - // We don't want to patch more than once - in future go to cti_op_put_by_id_generic. - repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_array_fail)); + if (resolveType == GlobalProperty || resolveType == GlobalPropertyWithVarInjectionChecks) + linkSlowCase(iter); + linkSlowCase(iter); + callOperation(WithProfile, operationGetFromScope, dst, currentInstruction); } -void JIT::privateCompileGetByIdProto(StructureStubInfo* stubInfo, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame) +void JIT::emitPutGlobalProperty(uintptr_t* operandSlot, int value) { - // The prototype object definitely exists (if this stub exists the CodeBlock is referencing a Structure that is - // referencing the prototype object - let's speculatively load it's table nice and early!) - JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame)); - - // Check eax is an object of the right Structure. - Jump failureCases1 = checkStructure(regT0, structure); - - // Check the prototype object's Structure had not changed. - move(TrustedImmPtr(protoObject), regT3); - Jump failureCases2 = branchPtr(NotEqual, Address(regT3, JSCell::structureOffset()), TrustedImmPtr(prototypeStructure)); - - bool needsStubLink = false; - - // Checks out okay! - if (slot.cachedPropertyType() == PropertySlot::Getter) { - needsStubLink = true; - compileGetDirectOffset(protoObject, regT1, cachedOffset); - JITStubCall stubCall(this, cti_op_get_by_id_getter_stub); - stubCall.addArgument(regT1); - stubCall.addArgument(regT0); - stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress())); - stubCall.call(); - } else if (slot.cachedPropertyType() == PropertySlot::Custom) { - needsStubLink = true; - JITStubCall stubCall(this, cti_op_get_by_id_custom_stub); - stubCall.addArgument(TrustedImmPtr(protoObject)); - stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress())); - stubCall.addArgument(TrustedImmPtr(const_cast(&ident))); - stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress())); - stubCall.call(); - } else - compileGetDirectOffset(protoObject, regT0, cachedOffset); - Jump success = jump(); - LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock->executablePool()); - - // Use the patch information to link the failure cases back to the original slow case routine. - CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall); - patchBuffer.link(failureCases1, slowCaseBegin); - patchBuffer.link(failureCases2, slowCaseBegin); - - // On success return back to the hot patch code, at a point it will perform the store to dest for us. - patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult)); - - if (needsStubLink) { - for (Vector::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) { - if (iter->to) - patchBuffer.link(iter->from, FunctionPtr(iter->to)); - } - } - // Track the stub we have created so that it will be deleted later. - CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum(); - stubInfo->stubRoutine = entryLabel; + emitGetVirtualRegister(value, regT2); - // Finally patch the jump to slow case back in the hot path to jump here instead. - CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase); - RepatchBuffer repatchBuffer(m_codeBlock); - repatchBuffer.relink(jumpLocation, entryLabel); - - // We don't want to patch more than once - in future go to cti_op_put_by_id_generic. - repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list)); + loadPtr(Address(regT0, JSObject::butterflyOffset()), regT0); + loadPtr(operandSlot, regT1); + negPtr(regT1); + storePtr(regT2, BaseIndex(regT0, regT1, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue))); } -void JIT::privateCompileGetByIdSelfList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset) +void JIT::emitPutGlobalVar(uintptr_t operand, int value, WatchpointSet* set) { - Jump failureCase = checkStructure(regT0, structure); - bool needsStubLink = false; - if (slot.cachedPropertyType() == PropertySlot::Getter) { - needsStubLink = true; - compileGetDirectOffset(regT0, regT1, structure, cachedOffset); - JITStubCall stubCall(this, cti_op_get_by_id_getter_stub); - stubCall.addArgument(regT1); - stubCall.addArgument(regT0); - stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress())); - stubCall.call(); - } else if (slot.cachedPropertyType() == PropertySlot::Custom) { - needsStubLink = true; - JITStubCall stubCall(this, cti_op_get_by_id_custom_stub); - stubCall.addArgument(regT0); - stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress())); - stubCall.addArgument(TrustedImmPtr(const_cast(&ident))); - stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress())); - stubCall.call(); - } else - compileGetDirectOffset(regT0, regT0, structure, cachedOffset); - Jump success = jump(); + emitGetVirtualRegister(value, regT0); + emitNotifyWrite(set); + storePtr(regT0, reinterpret_cast(operand)); +} - LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock->executablePool()); +void JIT::emitPutClosureVar(int scope, uintptr_t operand, int value, WatchpointSet* set) +{ + emitGetVirtualRegister(value, regT1); + emitGetVirtualRegister(scope, regT0); + emitNotifyWrite(set); + storePtr(regT1, Address(regT0, JSEnvironmentRecord::offsetOfVariables() + operand * sizeof(Register))); +} - if (needsStubLink) { - for (Vector::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) { - if (iter->to) - patchBuffer.link(iter->from, FunctionPtr(iter->to)); - } +void JIT::emit_op_put_to_scope(Instruction* currentInstruction) +{ + int scope = currentInstruction[1].u.operand; + int value = currentInstruction[3].u.operand; + ResolveType resolveType = ResolveModeAndType(currentInstruction[4].u.operand).type(); + Structure** structureSlot = currentInstruction[5].u.structure.slot(); + uintptr_t* operandSlot = reinterpret_cast(¤tInstruction[6].u.pointer); + + switch (resolveType) { + case GlobalProperty: + case GlobalPropertyWithVarInjectionChecks: + emitWriteBarrier(m_codeBlock->globalObject(), value, ShouldFilterValue); + emitLoadWithStructureCheck(scope, structureSlot); // Structure check covers var injection. + emitPutGlobalProperty(operandSlot, value); + break; + case GlobalVar: + case GlobalVarWithVarInjectionChecks: + emitWriteBarrier(m_codeBlock->globalObject(), value, ShouldFilterValue); + emitVarInjectionCheck(needsVarInjectionChecks(resolveType)); + emitPutGlobalVar(*operandSlot, value, currentInstruction[5].u.watchpointSet); + break; + case LocalClosureVar: + case ClosureVar: + case ClosureVarWithVarInjectionChecks: + emitWriteBarrier(scope, value, ShouldFilterValue); + emitVarInjectionCheck(needsVarInjectionChecks(resolveType)); + emitPutClosureVar(scope, *operandSlot, value, currentInstruction[5].u.watchpointSet); + break; + case Dynamic: + addSlowCase(jump()); + break; } +} - // Use the patch information to link the failure cases back to the original slow case routine. - CodeLocationLabel lastProtoBegin = polymorphicStructures->list[currentIndex - 1].stubRoutine; - if (!lastProtoBegin) - lastProtoBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall); +void JIT::emitSlow_op_put_to_scope(Instruction* currentInstruction, Vector::iterator& iter) +{ + ResolveType resolveType = ResolveModeAndType(currentInstruction[4].u.operand).type(); + unsigned linkCount = 0; + if (resolveType != GlobalVar && resolveType != ClosureVar && resolveType != LocalClosureVar) + linkCount++; + if ((resolveType == GlobalVar || resolveType == GlobalVarWithVarInjectionChecks || resolveType == LocalClosureVar) + && currentInstruction[5].u.watchpointSet->state() != IsInvalidated) + linkCount++; + if (resolveType == GlobalProperty || resolveType == GlobalPropertyWithVarInjectionChecks) + linkCount++; + if (!linkCount) + return; + while (linkCount--) + linkSlowCase(iter); + callOperation(operationPutToScope, currentInstruction); +} - patchBuffer.link(failureCase, lastProtoBegin); +void JIT::emit_op_get_from_arguments(Instruction* currentInstruction) +{ + int dst = currentInstruction[1].u.operand; + int arguments = currentInstruction[2].u.operand; + int index = currentInstruction[3].u.operand; + + emitGetVirtualRegister(arguments, regT0); + load64(Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier)), regT0); + emitValueProfilingSite(); + emitPutVirtualRegister(dst); +} - // On success return back to the hot patch code, at a point it will perform the store to dest for us. - patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult)); +void JIT::emit_op_put_to_arguments(Instruction* currentInstruction) +{ + int arguments = currentInstruction[1].u.operand; + int index = currentInstruction[2].u.operand; + int value = currentInstruction[3].u.operand; + + emitWriteBarrier(arguments, value, ShouldFilterValue); + + emitGetVirtualRegister(arguments, regT0); + emitGetVirtualRegister(value, regT1); + store64(regT1, Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier))); +} - CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum(); +void JIT::emit_op_init_global_const(Instruction* currentInstruction) +{ + JSGlobalObject* globalObject = m_codeBlock->globalObject(); + emitWriteBarrier(globalObject, currentInstruction[2].u.operand, ShouldFilterValue); + emitGetVirtualRegister(currentInstruction[2].u.operand, regT0); + store64(regT0, currentInstruction[1].u.variablePointer); +} - polymorphicStructures->list[currentIndex].set(*m_globalData, m_codeBlock->ownerExecutable(), entryLabel, structure); +#endif // USE(JSVALUE64) - // Finally patch the jump to slow case back in the hot path to jump here instead. - CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase); - RepatchBuffer repatchBuffer(m_codeBlock); - repatchBuffer.relink(jumpLocation, entryLabel); +#if USE(JSVALUE64) +void JIT::emitWriteBarrier(unsigned owner, unsigned value, WriteBarrierMode mode) +{ +#if ENABLE(GGC) + Jump valueNotCell; + if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) { + emitGetVirtualRegister(value, regT0); + valueNotCell = branchTest64(NonZero, regT0, tagMaskRegister); + } + + emitGetVirtualRegister(owner, regT0); + Jump ownerNotCell; + if (mode == ShouldFilterBaseAndValue || mode == ShouldFilterBase) + ownerNotCell = branchTest64(NonZero, regT0, tagMaskRegister); + + Jump ownerIsRememberedOrInEden = jumpIfIsRememberedOrInEden(regT0); + callOperation(operationUnconditionalWriteBarrier, regT0); + ownerIsRememberedOrInEden.link(this); + + if (mode == ShouldFilterBaseAndValue || mode == ShouldFilterBase) + ownerNotCell.link(this); + if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) + valueNotCell.link(this); +#else + UNUSED_PARAM(owner); + UNUSED_PARAM(value); + UNUSED_PARAM(mode); +#endif } -void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, Structure* prototypeStructure, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, CallFrame* callFrame) +void JIT::emitWriteBarrier(JSCell* owner, unsigned value, WriteBarrierMode mode) { - // The prototype object definitely exists (if this stub exists the CodeBlock is referencing a Structure that is - // referencing the prototype object - let's speculatively load it's table nice and early!) - JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame)); - - // Check eax is an object of the right Structure. - Jump failureCases1 = checkStructure(regT0, structure); - - // Check the prototype object's Structure had not changed. - move(TrustedImmPtr(protoObject), regT3); - Jump failureCases2 = branchPtr(NotEqual, Address(regT3, JSCell::structureOffset()), TrustedImmPtr(prototypeStructure)); - - // Checks out okay! - bool needsStubLink = false; - if (slot.cachedPropertyType() == PropertySlot::Getter) { - needsStubLink = true; - compileGetDirectOffset(protoObject, regT1, cachedOffset); - JITStubCall stubCall(this, cti_op_get_by_id_getter_stub); - stubCall.addArgument(regT1); - stubCall.addArgument(regT0); - stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress())); - stubCall.call(); - } else if (slot.cachedPropertyType() == PropertySlot::Custom) { - needsStubLink = true; - JITStubCall stubCall(this, cti_op_get_by_id_custom_stub); - stubCall.addArgument(TrustedImmPtr(protoObject)); - stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress())); - stubCall.addArgument(TrustedImmPtr(const_cast(&ident))); - stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress())); - stubCall.call(); - } else - compileGetDirectOffset(protoObject, regT0, cachedOffset); - - Jump success = jump(); +#if ENABLE(GGC) + emitGetVirtualRegister(value, regT0); + Jump valueNotCell; + if (mode == ShouldFilterValue) + valueNotCell = branchTest64(NonZero, regT0, tagMaskRegister); + + emitWriteBarrier(owner); + + if (mode == ShouldFilterValue) + valueNotCell.link(this); +#else + UNUSED_PARAM(owner); + UNUSED_PARAM(value); + UNUSED_PARAM(mode); +#endif +} - LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock->executablePool()); +#else // USE(JSVALUE64) - if (needsStubLink) { - for (Vector::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) { - if (iter->to) - patchBuffer.link(iter->from, FunctionPtr(iter->to)); - } +void JIT::emitWriteBarrier(unsigned owner, unsigned value, WriteBarrierMode mode) +{ +#if ENABLE(GGC) + Jump valueNotCell; + if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) { + emitLoadTag(value, regT0); + valueNotCell = branch32(NotEqual, regT0, TrustedImm32(JSValue::CellTag)); } + + emitLoad(owner, regT0, regT1); + Jump ownerNotCell; + if (mode == ShouldFilterBase || mode == ShouldFilterBaseAndValue) + ownerNotCell = branch32(NotEqual, regT0, TrustedImm32(JSValue::CellTag)); + + Jump ownerIsRememberedOrInEden = jumpIfIsRememberedOrInEden(regT1); + callOperation(operationUnconditionalWriteBarrier, regT1); + ownerIsRememberedOrInEden.link(this); + + if (mode == ShouldFilterBase || mode == ShouldFilterBaseAndValue) + ownerNotCell.link(this); + if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) + valueNotCell.link(this); +#else + UNUSED_PARAM(owner); + UNUSED_PARAM(value); + UNUSED_PARAM(mode); +#endif +} - // Use the patch information to link the failure cases back to the original slow case routine. - CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine; - patchBuffer.link(failureCases1, lastProtoBegin); - patchBuffer.link(failureCases2, lastProtoBegin); - - // On success return back to the hot patch code, at a point it will perform the store to dest for us. - patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult)); +void JIT::emitWriteBarrier(JSCell* owner, unsigned value, WriteBarrierMode mode) +{ +#if ENABLE(GGC) + Jump valueNotCell; + if (mode == ShouldFilterValue) { + emitLoadTag(value, regT0); + valueNotCell = branch32(NotEqual, regT0, TrustedImm32(JSValue::CellTag)); + } - CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum(); - prototypeStructures->list[currentIndex].set(*m_globalData, m_codeBlock->ownerExecutable(), entryLabel, structure, prototypeStructure); + emitWriteBarrier(owner); - // Finally patch the jump to slow case back in the hot path to jump here instead. - CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase); - RepatchBuffer repatchBuffer(m_codeBlock); - repatchBuffer.relink(jumpLocation, entryLabel); + if (mode == ShouldFilterValue) + valueNotCell.link(this); +#else + UNUSED_PARAM(owner); + UNUSED_PARAM(value); + UNUSED_PARAM(mode); +#endif } -void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, CallFrame* callFrame) +#endif // USE(JSVALUE64) + +void JIT::emitWriteBarrier(JSCell* owner) { - ASSERT(count); - JumpList bucketsOfFail; - - // Check eax is an object of the right Structure. - Jump baseObjectCheck = checkStructure(regT0, structure); - bucketsOfFail.append(baseObjectCheck); - - Structure* currStructure = structure; - WriteBarrier* it = chain->head(); - JSObject* protoObject = 0; - for (unsigned i = 0; i < count; ++i, ++it) { - protoObject = asObject(currStructure->prototypeForLookup(callFrame)); - currStructure = it->get(); - testPrototype(protoObject, bucketsOfFail); - } - ASSERT(protoObject); - - bool needsStubLink = false; - if (slot.cachedPropertyType() == PropertySlot::Getter) { - needsStubLink = true; - compileGetDirectOffset(protoObject, regT1, cachedOffset); - JITStubCall stubCall(this, cti_op_get_by_id_getter_stub); - stubCall.addArgument(regT1); - stubCall.addArgument(regT0); - stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress())); - stubCall.call(); - } else if (slot.cachedPropertyType() == PropertySlot::Custom) { - needsStubLink = true; - JITStubCall stubCall(this, cti_op_get_by_id_custom_stub); - stubCall.addArgument(TrustedImmPtr(protoObject)); - stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress())); - stubCall.addArgument(TrustedImmPtr(const_cast(&ident))); - stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress())); - stubCall.call(); +#if ENABLE(GGC) + if (!MarkedBlock::blockFor(owner)->isMarked(owner)) { + Jump ownerIsRememberedOrInEden = jumpIfIsRememberedOrInEden(owner); + callOperation(operationUnconditionalWriteBarrier, owner); + ownerIsRememberedOrInEden.link(this); } else - compileGetDirectOffset(protoObject, regT0, cachedOffset); - Jump success = jump(); + callOperation(operationUnconditionalWriteBarrier, owner); +#else + UNUSED_PARAM(owner); +#endif // ENABLE(GGC) +} - LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock->executablePool()); +void JIT::privateCompileGetByVal(ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode) +{ + Instruction* currentInstruction = m_codeBlock->instructions().begin() + byValInfo->bytecodeIndex; - if (needsStubLink) { - for (Vector::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) { - if (iter->to) - patchBuffer.link(iter->from, FunctionPtr(iter->to)); - } + PatchableJump badType; + JumpList slowCases; + + switch (arrayMode) { + case JITInt32: + slowCases = emitInt32GetByVal(currentInstruction, badType); + break; + case JITDouble: + slowCases = emitDoubleGetByVal(currentInstruction, badType); + break; + case JITContiguous: + slowCases = emitContiguousGetByVal(currentInstruction, badType); + break; + case JITArrayStorage: + slowCases = emitArrayStorageGetByVal(currentInstruction, badType); + break; + case JITDirectArguments: + slowCases = emitDirectArgumentsGetByVal(currentInstruction, badType); + break; + case JITScopedArguments: + slowCases = emitScopedArgumentsGetByVal(currentInstruction, badType); + break; + default: + TypedArrayType type = typedArrayTypeForJITArrayMode(arrayMode); + if (isInt(type)) + slowCases = emitIntTypedArrayGetByVal(currentInstruction, badType, type); + else + slowCases = emitFloatTypedArrayGetByVal(currentInstruction, badType, type); + break; } + + Jump done = jump(); - // Use the patch information to link the failure cases back to the original slow case routine. - CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine; - - patchBuffer.link(bucketsOfFail, lastProtoBegin); - - // On success return back to the hot patch code, at a point it will perform the store to dest for us. - patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult)); - - CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum(); - - // Track the stub we have created so that it will be deleted later. - prototypeStructures->list[currentIndex].set(callFrame->globalData(), m_codeBlock->ownerExecutable(), entryLabel, structure, chain); - - // Finally patch the jump to slow case back in the hot path to jump here instead. - CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase); + LinkBuffer patchBuffer(*m_vm, *this, m_codeBlock); + + patchBuffer.link(badType, CodeLocationLabel(MacroAssemblerCodePtr::createFromExecutableAddress(returnAddress.value())).labelAtOffset(byValInfo->returnAddressToSlowPath)); + patchBuffer.link(slowCases, CodeLocationLabel(MacroAssemblerCodePtr::createFromExecutableAddress(returnAddress.value())).labelAtOffset(byValInfo->returnAddressToSlowPath)); + + patchBuffer.link(done, byValInfo->badTypeJump.labelAtOffset(byValInfo->badTypeJumpToDone)); + + byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB( + m_codeBlock, patchBuffer, + ("Baseline get_by_val stub for %s, return point %p", toCString(*m_codeBlock).data(), returnAddress.value())); + RepatchBuffer repatchBuffer(m_codeBlock); - repatchBuffer.relink(jumpLocation, entryLabel); + repatchBuffer.relink(byValInfo->badTypeJump, CodeLocationLabel(byValInfo->stubRoutine->code().code())); + repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(operationGetByValGeneric)); } -void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, const Identifier& ident, const PropertySlot& slot, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame) +void JIT::privateCompilePutByVal(ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode) { - ASSERT(count); - - JumpList bucketsOfFail; + Instruction* currentInstruction = m_codeBlock->instructions().begin() + byValInfo->bytecodeIndex; + + PatchableJump badType; + JumpList slowCases; - // Check eax is an object of the right Structure. - bucketsOfFail.append(checkStructure(regT0, structure)); +#if ENABLE(GGC) + bool needsLinkForWriteBarrier = false; +#endif - Structure* currStructure = structure; - WriteBarrier* it = chain->head(); - JSObject* protoObject = 0; - for (unsigned i = 0; i < count; ++i, ++it) { - protoObject = asObject(currStructure->prototypeForLookup(callFrame)); - currStructure = it->get(); - testPrototype(protoObject, bucketsOfFail); + switch (arrayMode) { + case JITInt32: + slowCases = emitInt32PutByVal(currentInstruction, badType); + break; + case JITDouble: + slowCases = emitDoublePutByVal(currentInstruction, badType); + break; + case JITContiguous: + slowCases = emitContiguousPutByVal(currentInstruction, badType); +#if ENABLE(GGC) + needsLinkForWriteBarrier = true; +#endif + break; + case JITArrayStorage: + slowCases = emitArrayStoragePutByVal(currentInstruction, badType); +#if ENABLE(GGC) + needsLinkForWriteBarrier = true; +#endif + break; + default: + TypedArrayType type = typedArrayTypeForJITArrayMode(arrayMode); + if (isInt(type)) + slowCases = emitIntTypedArrayPutByVal(currentInstruction, badType, type); + else + slowCases = emitFloatTypedArrayPutByVal(currentInstruction, badType, type); + break; } - ASSERT(protoObject); - - bool needsStubLink = false; - if (slot.cachedPropertyType() == PropertySlot::Getter) { - needsStubLink = true; - compileGetDirectOffset(protoObject, regT1, cachedOffset); - JITStubCall stubCall(this, cti_op_get_by_id_getter_stub); - stubCall.addArgument(regT1); - stubCall.addArgument(regT0); - stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress())); - stubCall.call(); - } else if (slot.cachedPropertyType() == PropertySlot::Custom) { - needsStubLink = true; - JITStubCall stubCall(this, cti_op_get_by_id_custom_stub); - stubCall.addArgument(TrustedImmPtr(protoObject)); - stubCall.addArgument(TrustedImmPtr(FunctionPtr(slot.customGetter()).executableAddress())); - stubCall.addArgument(TrustedImmPtr(const_cast(&ident))); - stubCall.addArgument(TrustedImmPtr(stubInfo->callReturnLocation.executableAddress())); - stubCall.call(); - } else - compileGetDirectOffset(protoObject, regT0, cachedOffset); - Jump success = jump(); + + Jump done = jump(); + + LinkBuffer patchBuffer(*m_vm, *this, m_codeBlock); + patchBuffer.link(badType, CodeLocationLabel(MacroAssemblerCodePtr::createFromExecutableAddress(returnAddress.value())).labelAtOffset(byValInfo->returnAddressToSlowPath)); + patchBuffer.link(slowCases, CodeLocationLabel(MacroAssemblerCodePtr::createFromExecutableAddress(returnAddress.value())).labelAtOffset(byValInfo->returnAddressToSlowPath)); + patchBuffer.link(done, byValInfo->badTypeJump.labelAtOffset(byValInfo->badTypeJumpToDone)); +#if ENABLE(GGC) + if (needsLinkForWriteBarrier) { + ASSERT(m_calls.last().to == operationUnconditionalWriteBarrier); + patchBuffer.link(m_calls.last().from, operationUnconditionalWriteBarrier); + } +#endif + + bool isDirect = m_interpreter->getOpcodeID(currentInstruction->u.opcode) == op_put_by_val_direct; + if (!isDirect) { + byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB( + m_codeBlock, patchBuffer, + ("Baseline put_by_val stub for %s, return point %p", toCString(*m_codeBlock).data(), returnAddress.value())); + + } else { + byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB( + m_codeBlock, patchBuffer, + ("Baseline put_by_val_direct stub for %s, return point %p", toCString(*m_codeBlock).data(), returnAddress.value())); + } + RepatchBuffer repatchBuffer(m_codeBlock); + repatchBuffer.relink(byValInfo->badTypeJump, CodeLocationLabel(byValInfo->stubRoutine->code().code())); + repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(isDirect ? operationDirectPutByValGeneric : operationPutByValGeneric)); +} - LinkBuffer patchBuffer(*m_globalData, this, m_codeBlock->executablePool()); +JIT::JumpList JIT::emitDirectArgumentsGetByVal(Instruction*, PatchableJump& badType) +{ + JumpList slowCases; + +#if USE(JSVALUE64) + RegisterID base = regT0; + RegisterID property = regT1; + JSValueRegs result = JSValueRegs(regT0); + RegisterID scratch = regT3; +#else + RegisterID base = regT0; + RegisterID property = regT2; + JSValueRegs result = JSValueRegs(regT1, regT0); + RegisterID scratch = regT3; +#endif - if (needsStubLink) { - for (Vector::iterator iter = m_calls.begin(); iter != m_calls.end(); ++iter) { - if (iter->to) - patchBuffer.link(iter->from, FunctionPtr(iter->to)); - } - } + load8(Address(base, JSCell::typeInfoTypeOffset()), scratch); + badType = patchableBranch32(NotEqual, scratch, TrustedImm32(DirectArgumentsType)); + + slowCases.append(branch32(AboveOrEqual, property, Address(base, DirectArguments::offsetOfLength()))); + slowCases.append(branchTestPtr(NonZero, Address(base, DirectArguments::offsetOfOverrides()))); + + zeroExtend32ToPtr(property, scratch); + loadValue(BaseIndex(base, scratch, TimesEight, DirectArguments::storageOffset()), result); + + return slowCases; +} - // Use the patch information to link the failure cases back to the original slow case routine. - patchBuffer.link(bucketsOfFail, stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall)); +JIT::JumpList JIT::emitScopedArgumentsGetByVal(Instruction*, PatchableJump& badType) +{ + JumpList slowCases; + +#if USE(JSVALUE64) + RegisterID base = regT0; + RegisterID property = regT1; + JSValueRegs result = JSValueRegs(regT0); + RegisterID scratch = regT3; + RegisterID scratch2 = regT4; +#else + RegisterID base = regT0; + RegisterID property = regT2; + JSValueRegs result = JSValueRegs(regT1, regT0); + RegisterID scratch = regT3; + RegisterID scratch2 = regT4; +#endif - // On success return back to the hot patch code, at a point it will perform the store to dest for us. - patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult)); + load8(Address(base, JSCell::typeInfoTypeOffset()), scratch); + badType = patchableBranch32(NotEqual, scratch, TrustedImm32(ScopedArgumentsType)); + slowCases.append(branch32(AboveOrEqual, property, Address(base, ScopedArguments::offsetOfTotalLength()))); + + loadPtr(Address(base, ScopedArguments::offsetOfTable()), scratch); + load32(Address(scratch, ScopedArgumentsTable::offsetOfLength()), scratch2); + Jump overflowCase = branch32(AboveOrEqual, property, scratch2); + loadPtr(Address(base, ScopedArguments::offsetOfScope()), scratch2); + loadPtr(Address(scratch, ScopedArgumentsTable::offsetOfArguments()), scratch); + load32(BaseIndex(scratch, property, TimesFour), scratch); + slowCases.append(branch32(Equal, scratch, TrustedImm32(ScopeOffset::invalidOffset))); + loadValue(BaseIndex(scratch2, scratch, TimesEight, JSEnvironmentRecord::offsetOfVariables()), result); + Jump done = jump(); + overflowCase.link(this); + sub32(property, scratch2); + neg32(scratch2); + loadValue(BaseIndex(base, scratch2, TimesEight, ScopedArguments::overflowStorageOffset()), result); + slowCases.append(branchIfEmpty(result)); + done.link(this); + + return slowCases; +} - // Track the stub we have created so that it will be deleted later. - CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum(); - stubInfo->stubRoutine = entryLabel; +JIT::JumpList JIT::emitIntTypedArrayGetByVal(Instruction*, PatchableJump& badType, TypedArrayType type) +{ + ASSERT(isInt(type)); + + // The best way to test the array type is to use the classInfo. We need to do so without + // clobbering the register that holds the indexing type, base, and property. - // Finally patch the jump to slow case back in the hot path to jump here instead. - CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase); - RepatchBuffer repatchBuffer(m_codeBlock); - repatchBuffer.relink(jumpLocation, entryLabel); +#if USE(JSVALUE64) + RegisterID base = regT0; + RegisterID property = regT1; + RegisterID resultPayload = regT0; + RegisterID scratch = regT3; +#else + RegisterID base = regT0; + RegisterID property = regT2; + RegisterID resultPayload = regT0; + RegisterID resultTag = regT1; + RegisterID scratch = regT3; +#endif + + JumpList slowCases; + + load8(Address(base, JSCell::typeInfoTypeOffset()), scratch); + badType = patchableBranch32(NotEqual, scratch, TrustedImm32(typeForTypedArrayType(type))); + slowCases.append(branch32(AboveOrEqual, property, Address(base, JSArrayBufferView::offsetOfLength()))); + loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), base); + + switch (elementSize(type)) { + case 1: + if (isSigned(type)) + load8SignedExtendTo32(BaseIndex(base, property, TimesOne), resultPayload); + else + load8(BaseIndex(base, property, TimesOne), resultPayload); + break; + case 2: + if (isSigned(type)) + load16SignedExtendTo32(BaseIndex(base, property, TimesTwo), resultPayload); + else + load16(BaseIndex(base, property, TimesTwo), resultPayload); + break; + case 4: + load32(BaseIndex(base, property, TimesFour), resultPayload); + break; + default: + CRASH(); + } + + Jump done; + if (type == TypeUint32) { + Jump canBeInt = branch32(GreaterThanOrEqual, resultPayload, TrustedImm32(0)); + + convertInt32ToDouble(resultPayload, fpRegT0); + addDouble(AbsoluteAddress(&twoToThe32), fpRegT0); +#if USE(JSVALUE64) + moveDoubleTo64(fpRegT0, resultPayload); + sub64(tagTypeNumberRegister, resultPayload); +#else + moveDoubleToInts(fpRegT0, resultPayload, resultTag); +#endif + + done = jump(); + canBeInt.link(this); + } - // We don't want to patch more than once - in future go to cti_op_put_by_id_generic. - repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list)); +#if USE(JSVALUE64) + or64(tagTypeNumberRegister, resultPayload); +#else + move(TrustedImm32(JSValue::Int32Tag), resultTag); +#endif + if (done.isSet()) + done.link(this); + return slowCases; } -/* ------------------------------ END: !ENABLE / ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) ------------------------------ */ - -#endif // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS) +JIT::JumpList JIT::emitFloatTypedArrayGetByVal(Instruction*, PatchableJump& badType, TypedArrayType type) +{ + ASSERT(isFloat(type)); + +#if USE(JSVALUE64) + RegisterID base = regT0; + RegisterID property = regT1; + RegisterID resultPayload = regT0; + RegisterID scratch = regT3; +#else + RegisterID base = regT0; + RegisterID property = regT2; + RegisterID resultPayload = regT0; + RegisterID resultTag = regT1; + RegisterID scratch = regT3; +#endif + + JumpList slowCases; -#endif // USE(JSVALUE64) + load8(Address(base, JSCell::typeInfoTypeOffset()), scratch); + badType = patchableBranch32(NotEqual, scratch, TrustedImm32(typeForTypedArrayType(type))); + slowCases.append(branch32(AboveOrEqual, property, Address(base, JSArrayBufferView::offsetOfLength()))); + loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), base); + + switch (elementSize(type)) { + case 4: + loadFloat(BaseIndex(base, property, TimesFour), fpRegT0); + convertFloatToDouble(fpRegT0, fpRegT0); + break; + case 8: { + loadDouble(BaseIndex(base, property, TimesEight), fpRegT0); + break; + } + default: + CRASH(); + } + + Jump notNaN = branchDouble(DoubleEqual, fpRegT0, fpRegT0); + static const double NaN = PNaN; + loadDouble(TrustedImmPtr(&NaN), fpRegT0); + notNaN.link(this); + +#if USE(JSVALUE64) + moveDoubleTo64(fpRegT0, resultPayload); + sub64(tagTypeNumberRegister, resultPayload); +#else + moveDoubleToInts(fpRegT0, resultPayload, resultTag); +#endif + return slowCases; +} -void JIT::testPrototype(JSValue prototype, JumpList& failureCases) +JIT::JumpList JIT::emitIntTypedArrayPutByVal(Instruction* currentInstruction, PatchableJump& badType, TypedArrayType type) { - if (prototype.isNull()) - return; + ArrayProfile* profile = currentInstruction[4].u.arrayProfile; + ASSERT(isInt(type)); + + int value = currentInstruction[3].u.operand; - ASSERT(prototype.isCell()); - move(TrustedImmPtr(prototype.asCell()), regT3); - failureCases.append(branchPtr(NotEqual, Address(regT3, JSCell::structureOffset()), TrustedImmPtr(prototype.asCell()->structure()))); +#if USE(JSVALUE64) + RegisterID base = regT0; + RegisterID property = regT1; + RegisterID earlyScratch = regT3; + RegisterID lateScratch = regT2; +#else + RegisterID base = regT0; + RegisterID property = regT2; + RegisterID earlyScratch = regT3; + RegisterID lateScratch = regT1; +#endif + + JumpList slowCases; + + load8(Address(base, JSCell::typeInfoTypeOffset()), earlyScratch); + badType = patchableBranch32(NotEqual, earlyScratch, TrustedImm32(typeForTypedArrayType(type))); + Jump inBounds = branch32(Below, property, Address(base, JSArrayBufferView::offsetOfLength())); + emitArrayProfileOutOfBoundsSpecialCase(profile); + Jump done = jump(); + inBounds.link(this); + +#if USE(JSVALUE64) + emitGetVirtualRegister(value, earlyScratch); + slowCases.append(emitJumpIfNotImmediateInteger(earlyScratch)); +#else + emitLoad(value, lateScratch, earlyScratch); + slowCases.append(branch32(NotEqual, lateScratch, TrustedImm32(JSValue::Int32Tag))); +#endif + + // We would be loading this into base as in get_by_val, except that the slow + // path expects the base to be unclobbered. + loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), lateScratch); + + if (isClamped(type)) { + ASSERT(elementSize(type) == 1); + ASSERT(!isSigned(type)); + Jump inBounds = branch32(BelowOrEqual, earlyScratch, TrustedImm32(0xff)); + Jump tooBig = branch32(GreaterThan, earlyScratch, TrustedImm32(0xff)); + xor32(earlyScratch, earlyScratch); + Jump clamped = jump(); + tooBig.link(this); + move(TrustedImm32(0xff), earlyScratch); + clamped.link(this); + inBounds.link(this); + } + + switch (elementSize(type)) { + case 1: + store8(earlyScratch, BaseIndex(lateScratch, property, TimesOne)); + break; + case 2: + store16(earlyScratch, BaseIndex(lateScratch, property, TimesTwo)); + break; + case 4: + store32(earlyScratch, BaseIndex(lateScratch, property, TimesFour)); + break; + default: + CRASH(); + } + + done.link(this); + + return slowCases; } -void JIT::patchMethodCallProto(JSGlobalData& globalData, CodeBlock* codeBlock, MethodCallLinkInfo& methodCallLinkInfo, JSObjectWithGlobalObject* callee, Structure* structure, JSObject* proto, ReturnAddressPtr returnAddress) +JIT::JumpList JIT::emitFloatTypedArrayPutByVal(Instruction* currentInstruction, PatchableJump& badType, TypedArrayType type) { - RepatchBuffer repatchBuffer(codeBlock); + ArrayProfile* profile = currentInstruction[4].u.arrayProfile; + ASSERT(isFloat(type)); + + int value = currentInstruction[3].u.operand; + +#if USE(JSVALUE64) + RegisterID base = regT0; + RegisterID property = regT1; + RegisterID earlyScratch = regT3; + RegisterID lateScratch = regT2; +#else + RegisterID base = regT0; + RegisterID property = regT2; + RegisterID earlyScratch = regT3; + RegisterID lateScratch = regT1; +#endif + + JumpList slowCases; + + load8(Address(base, JSCell::typeInfoTypeOffset()), earlyScratch); + badType = patchableBranch32(NotEqual, earlyScratch, TrustedImm32(typeForTypedArrayType(type))); + Jump inBounds = branch32(Below, property, Address(base, JSArrayBufferView::offsetOfLength())); + emitArrayProfileOutOfBoundsSpecialCase(profile); + Jump done = jump(); + inBounds.link(this); + +#if USE(JSVALUE64) + emitGetVirtualRegister(value, earlyScratch); + Jump doubleCase = emitJumpIfNotImmediateInteger(earlyScratch); + convertInt32ToDouble(earlyScratch, fpRegT0); + Jump ready = jump(); + doubleCase.link(this); + slowCases.append(emitJumpIfNotImmediateNumber(earlyScratch)); + add64(tagTypeNumberRegister, earlyScratch); + move64ToDouble(earlyScratch, fpRegT0); + ready.link(this); +#else + emitLoad(value, lateScratch, earlyScratch); + Jump doubleCase = branch32(NotEqual, lateScratch, TrustedImm32(JSValue::Int32Tag)); + convertInt32ToDouble(earlyScratch, fpRegT0); + Jump ready = jump(); + doubleCase.link(this); + slowCases.append(branch32(Above, lateScratch, TrustedImm32(JSValue::LowestTag))); + moveIntsToDouble(earlyScratch, lateScratch, fpRegT0, fpRegT1); + ready.link(this); +#endif + + // We would be loading this into base as in get_by_val, except that the slow + // path expects the base to be unclobbered. + loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), lateScratch); + + switch (elementSize(type)) { + case 4: + convertDoubleToFloat(fpRegT0, fpRegT0); + storeFloat(fpRegT0, BaseIndex(lateScratch, property, TimesFour)); + break; + case 8: + storeDouble(fpRegT0, BaseIndex(lateScratch, property, TimesEight)); + break; + default: + CRASH(); + } - ASSERT(!methodCallLinkInfo.cachedStructure); - CodeLocationDataLabelPtr structureLocation = methodCallLinkInfo.cachedStructure.location(); - methodCallLinkInfo.cachedStructure.set(globalData, structureLocation, codeBlock->ownerExecutable(), structure); + done.link(this); - Structure* prototypeStructure = proto->structure(); - methodCallLinkInfo.cachedPrototypeStructure.set(globalData, structureLocation.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoStruct), codeBlock->ownerExecutable(), prototypeStructure); - methodCallLinkInfo.cachedPrototype.set(globalData, structureLocation.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoObj), codeBlock->ownerExecutable(), proto); - methodCallLinkInfo.cachedFunction.set(globalData, structureLocation.dataLabelPtrAtOffset(patchOffsetMethodCheckPutFunction), codeBlock->ownerExecutable(), callee); - repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id)); + return slowCases; } } // namespace JSC