JITPropertyAccess.cpp [plain text]
#include "config.h"
#include "JIT.h"
#if ENABLE(JIT)
#include "CodeBlock.h"
#include "JITInlineMethods.h"
#include "JITStubCall.h"
#include "JSArray.h"
#include "JSFunction.h"
#include "JSPropertyNameIterator.h"
#include "Interpreter.h"
#include "LinkBuffer.h"
#include "RepatchBuffer.h"
#include "ResultType.h"
#include "SamplingTool.h"
#ifndef NDEBUG
#include <stdio.h>
#endif
using namespace std;
namespace JSC {
#if USE(JSVALUE32_64)
void JIT::emit_op_put_by_index(Instruction* currentInstruction)
{
unsigned base = currentInstruction[1].u.operand;
unsigned property = currentInstruction[2].u.operand;
unsigned value = currentInstruction[3].u.operand;
JITStubCall stubCall(this, cti_op_put_by_index);
stubCall.addArgument(base);
stubCall.addArgument(Imm32(property));
stubCall.addArgument(value);
stubCall.call();
}
void JIT::emit_op_put_getter(Instruction* currentInstruction)
{
unsigned base = currentInstruction[1].u.operand;
unsigned property = currentInstruction[2].u.operand;
unsigned function = currentInstruction[3].u.operand;
JITStubCall stubCall(this, cti_op_put_getter);
stubCall.addArgument(base);
stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(property)));
stubCall.addArgument(function);
stubCall.call();
}
void JIT::emit_op_put_setter(Instruction* currentInstruction)
{
unsigned base = currentInstruction[1].u.operand;
unsigned property = currentInstruction[2].u.operand;
unsigned function = currentInstruction[3].u.operand;
JITStubCall stubCall(this, cti_op_put_setter);
stubCall.addArgument(base);
stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(property)));
stubCall.addArgument(function);
stubCall.call();
}
void JIT::emit_op_del_by_id(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned base = currentInstruction[2].u.operand;
unsigned property = currentInstruction[3].u.operand;
JITStubCall stubCall(this, cti_op_del_by_id);
stubCall.addArgument(base);
stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(property)));
stubCall.call(dst);
}
#if !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
void JIT::emit_op_method_check(Instruction*) {}
void JIT::emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&) { ASSERT_NOT_REACHED(); }
#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
#error "JIT_OPTIMIZE_METHOD_CALLS requires JIT_OPTIMIZE_PROPERTY_ACCESS"
#endif
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;
JITStubCall stubCall(this, cti_op_get_by_val);
stubCall.addArgument(base);
stubCall.addArgument(property);
stubCall.call(dst);
}
void JIT::emitSlow_op_get_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&)
{
ASSERT_NOT_REACHED();
}
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;
JITStubCall stubCall(this, cti_op_put_by_val);
stubCall.addArgument(base);
stubCall.addArgument(property);
stubCall.addArgument(value);
stubCall.call();
}
void JIT::emitSlow_op_put_by_val(Instruction*, Vector<SlowCaseEntry>::iterator&)
{
ASSERT_NOT_REACHED();
}
void JIT::emit_op_get_by_id(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
int ident = currentInstruction[3].u.operand;
JITStubCall stubCall(this, cti_op_get_by_id_generic);
stubCall.addArgument(base);
stubCall.addArgument(ImmPtr(&(m_codeBlock->identifier(ident))));
stubCall.call(dst);
m_propertyAccessInstructionIndex++;
}
void JIT::emitSlow_op_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&)
{
m_propertyAccessInstructionIndex++;
ASSERT_NOT_REACHED();
}
void JIT::emit_op_put_by_id(Instruction* currentInstruction)
{
int base = currentInstruction[1].u.operand;
int ident = currentInstruction[2].u.operand;
int value = currentInstruction[3].u.operand;
JITStubCall stubCall(this, cti_op_put_by_id_generic);
stubCall.addArgument(base);
stubCall.addArgument(ImmPtr(&(m_codeBlock->identifier(ident))));
stubCall.addArgument(value);
stubCall.call();
m_propertyAccessInstructionIndex++;
}
void JIT::emitSlow_op_put_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&)
{
m_propertyAccessInstructionIndex++;
ASSERT_NOT_REACHED();
}
#else // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
void JIT::emit_op_method_check(Instruction* currentInstruction)
{
ASSERT(m_interpreter->getOpcodeID((currentInstruction + OPCODE_LENGTH(op_method_check))->u.opcode) == op_get_by_id);
currentInstruction += OPCODE_LENGTH(op_method_check);
m_methodCallCompilationInfo.append(MethodCallCompilationInfo(m_propertyAccessInstructionIndex));
MethodCallCompilationInfo& info = m_methodCallCompilationInfo.last();
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
BEGIN_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), info.structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
DataLabelPtr protoStructureToCompare, protoObj = moveWithPatch(ImmPtr(0), regT2);
Jump protoStructureCheck = branchPtrWithPatch(NotEqual, Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), protoStructureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
DataLabelPtr putFunction = moveWithPatch(ImmPtr(0), regT0);
END_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
move(Imm32(JSValue::CellTag), regT1);
Jump match = jump();
ASSERT(differenceBetween(info.structureToCompare, protoObj) == patchOffsetMethodCheckProtoObj);
ASSERT(differenceBetween(info.structureToCompare, protoStructureToCompare) == patchOffsetMethodCheckProtoStruct);
ASSERT(differenceBetween(info.structureToCompare, putFunction) == patchOffsetMethodCheckPutFunction);
structureCheck.link(this);
protoStructureCheck.link(this);
compileGetByIdHotPath();
match.link(this);
emitStore(dst, regT1, regT0);
map(m_bytecodeIndex + OPCODE_LENGTH(op_method_check), dst, regT1, regT0);
m_bytecodeIndex += OPCODE_LENGTH(op_get_by_id);
}
void JIT::emitSlow_op_method_check(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
currentInstruction += OPCODE_LENGTH(op_method_check);
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
int ident = currentInstruction[3].u.operand;
compileGetByIdSlowCase(dst, base, &(m_codeBlock->identifier(ident)), iter, true);
m_bytecodeIndex += OPCODE_LENGTH(op_get_by_id);
}
#else //!ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
void JIT::emit_op_method_check(Instruction*) {}
void JIT::emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&) { ASSERT_NOT_REACHED(); }
#endif
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;
emitLoad2(base, regT1, regT0, property, regT3, regT2);
addSlowCase(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
emitJumpSlowCaseIfNotJSCell(base, regT1);
addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT3);
addSlowCase(branch32(AboveOrEqual, regT2, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength))));
load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + 4), regT1); load32(BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), regT0); addSlowCase(branch32(Equal, regT1, Imm32(JSValue::EmptyValueTag)));
emitStore(dst, regT1, regT0);
map(m_bytecodeIndex + OPCODE_LENGTH(op_get_by_val), dst, regT1, regT0);
}
void JIT::emitSlow_op_get_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
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); linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_get_by_val);
stubCall.addArgument(base);
stubCall.addArgument(property);
stubCall.call(dst);
}
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;
emitLoad2(base, regT1, regT0, property, regT3, regT2);
addSlowCase(branch32(NotEqual, regT3, Imm32(JSValue::Int32Tag)));
emitJumpSlowCaseIfNotJSCell(base, regT1);
addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
addSlowCase(branch32(AboveOrEqual, regT2, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength))));
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT3);
Jump empty = branch32(Equal, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + 4), Imm32(JSValue::EmptyValueTag));
Label storeResult(this);
emitLoad(value, regT1, regT0);
store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]))); store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + 4)); Jump end = jump();
empty.link(this);
add32(Imm32(1), Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
branch32(Below, regT2, Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_length))).linkTo(storeResult, this);
add32(Imm32(1), regT2, regT0);
store32(regT0, Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_length)));
jump().linkTo(storeResult, this);
end.link(this);
}
void JIT::emitSlow_op_put_by_val(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned base = currentInstruction[1].u.operand;
unsigned property = currentInstruction[2].u.operand;
unsigned value = currentInstruction[3].u.operand;
linkSlowCase(iter); linkSlowCaseIfNotJSCell(iter, base); linkSlowCase(iter); linkSlowCase(iter);
JITStubCall stubPutByValCall(this, cti_op_put_by_val);
stubPutByValCall.addArgument(base);
stubPutByValCall.addArgument(property);
stubPutByValCall.addArgument(value);
stubPutByValCall.call();
}
void JIT::emit_op_get_by_id(Instruction* currentInstruction)
{
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
compileGetByIdHotPath();
emitStore(dst, regT1, regT0);
map(m_bytecodeIndex + OPCODE_LENGTH(op_get_by_id), dst, regT1, regT0);
}
void JIT::compileGetByIdHotPath()
{
BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
Label hotPathBegin(this);
m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
m_propertyAccessInstructionIndex++;
DataLabelPtr structureToCompare;
Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
addSlowCase(structureCheck);
ASSERT(differenceBetween(hotPathBegin, structureToCompare) == patchOffsetGetByIdStructure);
ASSERT(differenceBetween(hotPathBegin, structureCheck) == patchOffsetGetByIdBranchToSlowCase);
Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT2);
Label externalLoadComplete(this);
ASSERT(differenceBetween(hotPathBegin, externalLoad) == patchOffsetGetByIdExternalLoad);
ASSERT(differenceBetween(externalLoad, externalLoadComplete) == patchLengthGetByIdExternalLoad);
DataLabel32 displacementLabel1 = loadPtrWithAddressOffsetPatch(Address(regT2, patchGetByIdDefaultOffset), regT0); ASSERT(differenceBetween(hotPathBegin, displacementLabel1) == patchOffsetGetByIdPropertyMapOffset1);
DataLabel32 displacementLabel2 = loadPtrWithAddressOffsetPatch(Address(regT2, patchGetByIdDefaultOffset), regT1); ASSERT(differenceBetween(hotPathBegin, displacementLabel2) == patchOffsetGetByIdPropertyMapOffset2);
Label putResult(this);
ASSERT(differenceBetween(hotPathBegin, putResult) == patchOffsetGetByIdPutResult);
END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
}
void JIT::emitSlow_op_get_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
int dst = currentInstruction[1].u.operand;
int base = currentInstruction[2].u.operand;
int ident = currentInstruction[3].u.operand;
compileGetByIdSlowCase(dst, base, &(m_codeBlock->identifier(ident)), iter);
}
void JIT::compileGetByIdSlowCase(int dst, int base, Identifier* ident, Vector<SlowCaseEntry>::iterator& iter, bool isMethodCheck)
{
linkSlowCaseIfNotJSCell(iter, base);
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(regT1, regT0);
stubCall.addArgument(ImmPtr(ident));
Call call = stubCall.call(dst);
END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
ASSERT(differenceBetween(coldPathBegin, call) == patchOffsetGetByIdSlowCaseCall);
m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].callReturnLocation = call;
m_propertyAccessInstructionIndex++;
}
void JIT::emit_op_put_by_id(Instruction* currentInstruction)
{
int base = currentInstruction[1].u.operand;
int value = currentInstruction[3].u.operand;
emitLoad2(base, regT1, regT0, value, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(base, regT1);
BEGIN_UNINTERRUPTED_SEQUENCE(sequencePutById);
Label hotPathBegin(this);
m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
m_propertyAccessInstructionIndex++;
DataLabelPtr structureToCompare;
addSlowCase(branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure))));
ASSERT(differenceBetween(hotPathBegin, structureToCompare) == patchOffsetPutByIdStructure);
Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT0);
Label externalLoadComplete(this);
ASSERT(differenceBetween(hotPathBegin, externalLoad) == patchOffsetPutByIdExternalLoad);
ASSERT(differenceBetween(externalLoad, externalLoadComplete) == patchLengthPutByIdExternalLoad);
DataLabel32 displacementLabel1 = storePtrWithAddressOffsetPatch(regT2, Address(regT0, patchGetByIdDefaultOffset)); DataLabel32 displacementLabel2 = storePtrWithAddressOffsetPatch(regT3, Address(regT0, patchGetByIdDefaultOffset));
END_UNINTERRUPTED_SEQUENCE(sequencePutById);
ASSERT(differenceBetween(hotPathBegin, displacementLabel1) == patchOffsetPutByIdPropertyMapOffset1);
ASSERT(differenceBetween(hotPathBegin, displacementLabel2) == patchOffsetPutByIdPropertyMapOffset2);
}
void JIT::emitSlow_op_put_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
int base = currentInstruction[1].u.operand;
int ident = currentInstruction[2].u.operand;
linkSlowCaseIfNotJSCell(iter, base);
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_put_by_id);
stubCall.addArgument(regT1, regT0);
stubCall.addArgument(ImmPtr(&(m_codeBlock->identifier(ident))));
stubCall.addArgument(regT3, regT2);
Call call = stubCall.call();
m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].callReturnLocation = call;
m_propertyAccessInstructionIndex++;
}
void JIT::compilePutDirectOffset(RegisterID base, RegisterID valueTag, RegisterID valuePayload, Structure* structure, size_t cachedOffset)
{
int offset = cachedOffset;
if (structure->isUsingInlineStorage())
offset += OBJECT_OFFSETOF(JSObject, m_inlineStorage) / sizeof(Register);
else
loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
emitStore(offset, valueTag, valuePayload, base);
}
void JIT::compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, Structure* structure, size_t cachedOffset)
{
int offset = cachedOffset;
if (structure->isUsingInlineStorage())
offset += OBJECT_OFFSETOF(JSObject, m_inlineStorage) / sizeof(Register);
else
loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
emitLoad(offset, resultTag, resultPayload, base);
}
void JIT::compileGetDirectOffset(JSObject* base, RegisterID temp, RegisterID resultTag, RegisterID resultPayload, size_t cachedOffset)
{
if (base->isUsingInlineStorage()) {
load32(reinterpret_cast<char*>(&base->m_inlineStorage[cachedOffset]), resultPayload);
load32(reinterpret_cast<char*>(&base->m_inlineStorage[cachedOffset]) + 4, resultTag);
return;
}
size_t offset = cachedOffset * sizeof(JSValue);
PropertyStorage* protoPropertyStorage = &base->m_externalStorage;
loadPtr(static_cast<void*>(protoPropertyStorage), temp);
load32(Address(temp, offset), resultPayload);
load32(Address(temp, offset + 4), resultTag);
}
void JIT::testPrototype(Structure* structure, JumpList& failureCases)
{
if (structure->m_prototype.isNull())
return;
failureCases.append(branchPtr(NotEqual, AbsoluteAddress(&asCell(structure->m_prototype)->m_structure), ImmPtr(asCell(structure->m_prototype)->m_structure)));
}
void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress)
{
JumpList failureCases;
failureCases.append(branch32(NotEqual, regT1, Imm32(JSValue::CellTag)));
failureCases.append(branchPtr(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), ImmPtr(oldStructure)));
testPrototype(oldStructure, failureCases);
for (RefPtr<Structure>* it = chain->head(); *it; ++it)
testPrototype(it->get(), failureCases);
Call callTarget;
bool willNeedStorageRealloc = oldStructure->propertyStorageCapacity() != newStructure->propertyStorageCapacity();
if (willNeedStorageRealloc) {
preserveReturnAddressAfterCall(regT3);
JITStubCall stubCall(this, cti_op_put_by_id_transition_realloc);
stubCall.skipArgument(); stubCall.skipArgument(); stubCall.skipArgument(); stubCall.addArgument(Imm32(oldStructure->propertyStorageCapacity()));
stubCall.addArgument(Imm32(newStructure->propertyStorageCapacity()));
stubCall.call(regT0);
restoreReturnAddressBeforeReturn(regT3);
}
sub32(Imm32(1), AbsoluteAddress(oldStructure->addressOfCount()));
add32(Imm32(1), AbsoluteAddress(newStructure->addressOfCount()));
storePtr(ImmPtr(newStructure), Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)));
load32(Address(stackPointerRegister, offsetof(struct JITStackFrame, args[2]) + sizeof(void*)), regT3);
load32(Address(stackPointerRegister, offsetof(struct JITStackFrame, args[2]) + sizeof(void*) + 4), regT2);
compilePutDirectOffset(regT0, regT2, regT3, newStructure, cachedOffset);
ret();
ASSERT(!failureCases.empty());
failureCases.link(this);
restoreArgumentReferenceForTrampoline();
Call failureCall = tailRecursiveCall();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
patchBuffer.link(failureCall, FunctionPtr(cti_op_put_by_id_fail));
if (willNeedStorageRealloc) {
ASSERT(m_calls.size() == 1);
patchBuffer.link(m_calls[0].from, FunctionPtr(cti_op_put_by_id_transition_realloc));
}
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)
{
RepatchBuffer repatchBuffer(codeBlock);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_self_fail));
int offset = sizeof(JSValue) * cachedOffset;
if (structure->isUsingInlineStorage())
repatchBuffer.repatchLoadPtrToLEA(stubInfo->hotPathBegin.instructionAtOffset(patchOffsetGetByIdExternalLoad));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetGetByIdStructure), structure);
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetGetByIdPropertyMapOffset1), offset); repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetGetByIdPropertyMapOffset2), offset + 4); }
void JIT::patchMethodCallProto(CodeBlock* codeBlock, MethodCallLinkInfo& methodCallLinkInfo, JSFunction* callee, Structure* structure, JSObject* proto, ReturnAddressPtr returnAddress)
{
RepatchBuffer repatchBuffer(codeBlock);
ASSERT(!methodCallLinkInfo.cachedStructure);
methodCallLinkInfo.cachedStructure = structure;
structure->ref();
Structure* prototypeStructure = proto->structure();
ASSERT(!methodCallLinkInfo.cachedPrototypeStructure);
methodCallLinkInfo.cachedPrototypeStructure = prototypeStructure;
prototypeStructure->ref();
repatchBuffer.repatch(methodCallLinkInfo.structureLabel, structure);
repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoObj), proto);
repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoStruct), prototypeStructure);
repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckPutFunction), callee);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id));
}
void JIT::patchPutByIdReplace(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress)
{
RepatchBuffer repatchBuffer(codeBlock);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_put_by_id_generic));
int offset = sizeof(JSValue) * cachedOffset;
if (structure->isUsingInlineStorage())
repatchBuffer.repatchLoadPtrToLEA(stubInfo->hotPathBegin.instructionAtOffset(patchOffsetPutByIdExternalLoad));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetPutByIdStructure), structure);
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetPutByIdPropertyMapOffset1), offset); repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetPutByIdPropertyMapOffset2), offset + 4); }
void JIT::privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress)
{
StructureStubInfo* stubInfo = &m_codeBlock->getStubInfo(returnAddress);
Jump failureCases1 = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr));
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT2);
load32(Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length)), regT2);
Jump failureCases2 = branch32(Above, regT2, Imm32(INT_MAX));
move(regT2, regT0);
move(Imm32(JSValue::Int32Tag), regT1);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
patchBuffer.link(failureCases1, slowCaseBegin);
patchBuffer.link(failureCases2, slowCaseBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
stubInfo->stubRoutine = entryLabel;
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_array_fail));
}
void JIT::privateCompileGetByIdProto(StructureStubInfo* stubInfo, Structure* structure, Structure* prototypeStructure, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
{
JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
Jump failureCases1 = checkStructure(regT0, structure);
Structure** prototypeStructureAddress = &(protoObject->m_structure);
#if CPU(X86_64)
move(ImmPtr(prototypeStructure), regT3);
Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
#else
Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
#endif
compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
patchBuffer.link(failureCases1, slowCaseBegin);
patchBuffer.link(failureCases2, slowCaseBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
stubInfo->stubRoutine = entryLabel;
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
}
void JIT::privateCompileGetByIdSelfList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, size_t cachedOffset)
{
Jump failureCase = checkStructure(regT0, structure);
compileGetDirectOffset(regT0, regT1, regT0, structure, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
CodeLocationLabel lastProtoBegin = polymorphicStructures->list[currentIndex - 1].stubRoutine;
if (!lastProtoBegin)
lastProtoBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
patchBuffer.link(failureCase, lastProtoBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
structure->ref();
polymorphicStructures->list[currentIndex].set(entryLabel, structure);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
}
void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, Structure* prototypeStructure, size_t cachedOffset, CallFrame* callFrame)
{
JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
Jump failureCases1 = checkStructure(regT0, structure);
Structure** prototypeStructureAddress = &(protoObject->m_structure);
#if CPU(X86_64)
move(ImmPtr(prototypeStructure), regT3);
Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
#else
Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
#endif
compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine;
patchBuffer.link(failureCases1, lastProtoBegin);
patchBuffer.link(failureCases2, lastProtoBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
structure->ref();
prototypeStructure->ref();
prototypeStructures->list[currentIndex].set(entryLabel, structure, prototypeStructure);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
}
void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, StructureChain* chain, size_t count, size_t cachedOffset, CallFrame* callFrame)
{
ASSERT(count);
JumpList bucketsOfFail;
bucketsOfFail.append(checkStructure(regT0, structure));
Structure* currStructure = structure;
RefPtr<Structure>* chainEntries = chain->head();
JSObject* protoObject = 0;
for (unsigned i = 0; i < count; ++i) {
protoObject = asObject(currStructure->prototypeForLookup(callFrame));
currStructure = chainEntries[i].get();
Structure** prototypeStructureAddress = &(protoObject->m_structure);
#if CPU(X86_64)
move(ImmPtr(currStructure), regT3);
bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
#else
bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
#endif
}
ASSERT(protoObject);
compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine;
patchBuffer.link(bucketsOfFail, lastProtoBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
structure->ref();
chain->ref();
prototypeStructures->list[currentIndex].set(entryLabel, structure, chain);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
}
void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
{
ASSERT(count);
JumpList bucketsOfFail;
bucketsOfFail.append(checkStructure(regT0, structure));
Structure* currStructure = structure;
RefPtr<Structure>* chainEntries = chain->head();
JSObject* protoObject = 0;
for (unsigned i = 0; i < count; ++i) {
protoObject = asObject(currStructure->prototypeForLookup(callFrame));
currStructure = chainEntries[i].get();
Structure** prototypeStructureAddress = &(protoObject->m_structure);
#if CPU(X86_64)
move(ImmPtr(currStructure), regT3);
bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
#else
bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
#endif
}
ASSERT(protoObject);
compileGetDirectOffset(protoObject, regT2, regT1, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
patchBuffer.link(bucketsOfFail, stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall));
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
stubInfo->stubRoutine = entryLabel;
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
}
#endif // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
void JIT::compileGetDirectOffset(RegisterID base, RegisterID resultTag, RegisterID resultPayload, RegisterID structure, RegisterID offset)
{
ASSERT(sizeof(((Structure*)0)->m_propertyStorageCapacity) == sizeof(int32_t));
ASSERT(sizeof(JSObject::inlineStorageCapacity) == sizeof(int32_t));
ASSERT(sizeof(JSValue) == 8);
Jump notUsingInlineStorage = branch32(NotEqual, Address(structure, OBJECT_OFFSETOF(Structure, m_propertyStorageCapacity)), Imm32(JSObject::inlineStorageCapacity));
loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSObject, m_inlineStorage)+OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSObject, m_inlineStorage)+OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
Jump finishedLoad = jump();
notUsingInlineStorage.link(this);
loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload);
loadPtr(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag);
finishedLoad.link(this);
}
void JIT::emit_op_get_by_pname(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned base = currentInstruction[2].u.operand;
unsigned property = currentInstruction[3].u.operand;
unsigned expected = currentInstruction[4].u.operand;
unsigned iter = currentInstruction[5].u.operand;
unsigned i = currentInstruction[6].u.operand;
emitLoad2(property, regT1, regT0, base, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(property, regT1);
addSlowCase(branchPtr(NotEqual, regT0, payloadFor(expected)));
emitJumpSlowCaseIfNotJSCell(base, regT3);
emitLoadPayload(iter, regT1);
loadPtr(Address(regT2, OBJECT_OFFSETOF(JSCell, m_structure)), regT0);
addSlowCase(branchPtr(NotEqual, regT0, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure))));
load32(addressFor(i), regT3);
sub32(Imm32(1), regT3);
addSlowCase(branch32(AboveOrEqual, regT3, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_numCacheableSlots))));
compileGetDirectOffset(regT2, regT1, regT0, regT0, regT3);
emitStore(dst, regT1, regT0);
map(m_bytecodeIndex + OPCODE_LENGTH(op_get_by_pname), dst, regT1, regT0);
}
void JIT::emitSlow_op_get_by_pname(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned base = currentInstruction[2].u.operand;
unsigned property = currentInstruction[3].u.operand;
linkSlowCaseIfNotJSCell(iter, property);
linkSlowCase(iter);
linkSlowCaseIfNotJSCell(iter, base);
linkSlowCase(iter);
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_get_by_val);
stubCall.addArgument(base);
stubCall.addArgument(property);
stubCall.call(dst);
}
#else // USE(JSVALUE32_64)
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;
emitGetVirtualRegisters(base, regT0, property, regT1);
emitJumpSlowCaseIfNotImmediateInteger(regT1);
#if USE(JSVALUE64)
zeroExtend32ToPtr(regT1, regT1);
#else
emitFastArithImmToInt(regT1);
#endif
emitJumpSlowCaseIfNotJSCell(regT0, base);
addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT2);
addSlowCase(branch32(AboveOrEqual, regT1, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength))));
loadPtr(BaseIndex(regT2, regT1, ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), regT0);
addSlowCase(branchTestPtr(Zero, regT0));
emitPutVirtualRegister(dst);
}
void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, RegisterID structure, RegisterID offset, RegisterID scratch)
{
ASSERT(sizeof(((Structure*)0)->m_propertyStorageCapacity) == sizeof(int32_t));
ASSERT(sizeof(JSObject::inlineStorageCapacity) == sizeof(int32_t));
Jump notUsingInlineStorage = branch32(NotEqual, Address(structure, OBJECT_OFFSETOF(Structure, m_propertyStorageCapacity)), Imm32(JSObject::inlineStorageCapacity));
loadPtr(BaseIndex(base, offset, ScalePtr, OBJECT_OFFSETOF(JSObject, m_inlineStorage)), result);
Jump finishedLoad = jump();
notUsingInlineStorage.link(this);
loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), scratch);
loadPtr(BaseIndex(scratch, offset, ScalePtr, 0), result);
finishedLoad.link(this);
}
void JIT::emit_op_get_by_pname(Instruction* currentInstruction)
{
unsigned dst = currentInstruction[1].u.operand;
unsigned base = currentInstruction[2].u.operand;
unsigned property = currentInstruction[3].u.operand;
unsigned expected = currentInstruction[4].u.operand;
unsigned iter = currentInstruction[5].u.operand;
unsigned i = currentInstruction[6].u.operand;
emitGetVirtualRegister(property, regT0);
addSlowCase(branchPtr(NotEqual, regT0, addressFor(expected)));
emitGetVirtualRegisters(base, regT0, iter, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, base);
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), regT2);
addSlowCase(branchPtr(NotEqual, regT2, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_cachedStructure))));
load32(addressFor(i), regT3);
sub32(Imm32(1), regT3);
addSlowCase(branch32(AboveOrEqual, regT3, Address(regT1, OBJECT_OFFSETOF(JSPropertyNameIterator, m_numCacheableSlots))));
compileGetDirectOffset(regT0, regT0, regT2, regT3, regT1);
emitPutVirtualRegister(dst, regT0);
}
void JIT::emitSlow_op_get_by_pname(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
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);
}
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;
emitGetVirtualRegisters(base, regT0, property, regT1);
emitJumpSlowCaseIfNotImmediateInteger(regT1);
#if USE(JSVALUE64)
zeroExtend32ToPtr(regT1, regT1);
#else
emitFastArithImmToInt(regT1);
#endif
emitJumpSlowCaseIfNotJSCell(regT0, base);
addSlowCase(branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr)));
addSlowCase(branch32(AboveOrEqual, regT1, Address(regT0, OBJECT_OFFSETOF(JSArray, m_vectorLength))));
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), 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();
empty.link(this);
add32(Imm32(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(Imm32(1), regT0);
store32(regT0, Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length)));
jump().linkTo(storeResult, this);
end.link(this);
}
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(Imm32(currentInstruction[2].u.operand));
stubCall.addArgument(currentInstruction[3].u.operand, regT2);
stubCall.call();
}
void JIT::emit_op_put_getter(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_put_getter);
stubCall.addArgument(currentInstruction[1].u.operand, regT2);
stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
stubCall.addArgument(currentInstruction[3].u.operand, regT2);
stubCall.call();
}
void JIT::emit_op_put_setter(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_put_setter);
stubCall.addArgument(currentInstruction[1].u.operand, regT2);
stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(currentInstruction[2].u.operand)));
stubCall.addArgument(currentInstruction[3].u.operand, regT2);
stubCall.call();
}
void JIT::emit_op_del_by_id(Instruction* currentInstruction)
{
JITStubCall stubCall(this, cti_op_del_by_id);
stubCall.addArgument(currentInstruction[2].u.operand, regT2);
stubCall.addArgument(ImmPtr(&m_codeBlock->identifier(currentInstruction[3].u.operand)));
stubCall.call(currentInstruction[1].u.operand);
}
#if !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
void JIT::emit_op_method_check(Instruction*) {}
void JIT::emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::iterator&) { ASSERT_NOT_REACHED(); }
#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
#error "JIT_OPTIMIZE_METHOD_CALLS requires JIT_OPTIMIZE_PROPERTY_ACCESS"
#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));
emitGetVirtualRegister(baseVReg, regT0);
JITStubCall stubCall(this, cti_op_get_by_id_generic);
stubCall.addArgument(regT0);
stubCall.addArgument(ImmPtr(ident));
stubCall.call(resultVReg);
m_propertyAccessInstructionIndex++;
}
void JIT::emitSlow_op_get_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&)
{
ASSERT_NOT_REACHED();
}
void JIT::emit_op_put_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;
emitGetVirtualRegisters(baseVReg, regT0, valueVReg, regT1);
JITStubCall stubCall(this, cti_op_put_by_id_generic);
stubCall.addArgument(regT0);
stubCall.addArgument(ImmPtr(ident));
stubCall.addArgument(regT1);
stubCall.call();
m_propertyAccessInstructionIndex++;
}
void JIT::emitSlow_op_put_by_id(Instruction*, Vector<SlowCaseEntry>::iterator&)
{
ASSERT_NOT_REACHED();
}
#else // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
#if ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
void JIT::emit_op_method_check(Instruction* currentInstruction)
{
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);
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, OBJECT_OFFSETOF(JSCell, m_structure)), info.structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
DataLabelPtr protoStructureToCompare, protoObj = moveWithPatch(ImmPtr(0), regT1);
Jump protoStructureCheck = branchPtrWithPatch(NotEqual, Address(regT1, OBJECT_OFFSETOF(JSCell, m_structure)), protoStructureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
DataLabelPtr putFunction = moveWithPatch(ImmPtr(0), regT0);
END_UNINTERRUPTED_SEQUENCE(sequenceMethodCheck);
Jump match = jump();
ASSERT_JIT_OFFSET(differenceBetween(info.structureToCompare, protoObj), patchOffsetMethodCheckProtoObj);
ASSERT_JIT_OFFSET(differenceBetween(info.structureToCompare, protoStructureToCompare), patchOffsetMethodCheckProtoStruct);
ASSERT_JIT_OFFSET(differenceBetween(info.structureToCompare, putFunction), patchOffsetMethodCheckPutFunction);
notCell.link(this);
structureCheck.link(this);
protoStructureCheck.link(this);
compileGetByIdHotPath(resultVReg, baseVReg, ident, m_propertyAccessInstructionIndex++);
match.link(this);
emitPutVirtualRegister(resultVReg);
m_bytecodeIndex += OPCODE_LENGTH(op_get_by_id);
}
void JIT::emitSlow_op_method_check(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
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);
m_bytecodeIndex += OPCODE_LENGTH(op_get_by_id);
}
#else //!ENABLE(JIT_OPTIMIZE_METHOD_CALLS)
void JIT::emit_op_method_check(Instruction*) {}
void JIT::emitSlow_op_method_check(Instruction*, Vector<SlowCaseEntry>::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));
emitGetVirtualRegister(baseVReg, regT0);
compileGetByIdHotPath(resultVReg, baseVReg, ident, m_propertyAccessInstructionIndex++);
emitPutVirtualRegister(resultVReg);
}
void JIT::compileGetByIdHotPath(int, int baseVReg, Identifier*, unsigned propertyAccessInstructionIndex)
{
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
BEGIN_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
Label hotPathBegin(this);
m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
DataLabelPtr structureToCompare;
Jump structureCheck = branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure)));
addSlowCase(structureCheck);
ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureToCompare), patchOffsetGetByIdStructure);
ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureCheck), patchOffsetGetByIdBranchToSlowCase)
Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT0);
Label externalLoadComplete(this);
ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, externalLoad), patchOffsetGetByIdExternalLoad);
ASSERT_JIT_OFFSET(differenceBetween(externalLoad, externalLoadComplete), patchLengthGetByIdExternalLoad);
DataLabel32 displacementLabel = loadPtrWithAddressOffsetPatch(Address(regT0, patchGetByIdDefaultOffset), regT0);
ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, displacementLabel), patchOffsetGetByIdPropertyMapOffset);
Label putResult(this);
END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdHotPath);
ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, putResult), patchOffsetGetByIdPutResult);
}
void JIT::emitSlow_op_get_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::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<SlowCaseEntry>::iterator& iter, bool isMethodCheck)
{
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(ImmPtr(ident));
Call call = stubCall.call(resultVReg);
END_UNINTERRUPTED_SEQUENCE(sequenceGetByIdSlowCase);
ASSERT_JIT_OFFSET(differenceBetween(coldPathBegin, call), patchOffsetGetByIdSlowCaseCall);
m_propertyAccessCompilationInfo[m_propertyAccessInstructionIndex].callReturnLocation = call;
m_propertyAccessInstructionIndex++;
}
void JIT::emit_op_put_by_id(Instruction* currentInstruction)
{
unsigned baseVReg = currentInstruction[1].u.operand;
unsigned valueVReg = currentInstruction[3].u.operand;
unsigned propertyAccessInstructionIndex = m_propertyAccessInstructionIndex++;
emitGetVirtualRegisters(baseVReg, regT0, valueVReg, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
BEGIN_UNINTERRUPTED_SEQUENCE(sequencePutById);
Label hotPathBegin(this);
m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].hotPathBegin = hotPathBegin;
DataLabelPtr structureToCompare;
addSlowCase(branchPtrWithPatch(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), structureToCompare, ImmPtr(reinterpret_cast<void*>(patchGetByIdDefaultStructure))));
ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, structureToCompare), patchOffsetPutByIdStructure);
Label externalLoad = loadPtrWithPatchToLEA(Address(regT0, OBJECT_OFFSETOF(JSObject, m_externalStorage)), regT0);
Label externalLoadComplete(this);
ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, externalLoad), patchOffsetPutByIdExternalLoad);
ASSERT_JIT_OFFSET(differenceBetween(externalLoad, externalLoadComplete), patchLengthPutByIdExternalLoad);
DataLabel32 displacementLabel = storePtrWithAddressOffsetPatch(regT1, Address(regT0, patchGetByIdDefaultOffset));
END_UNINTERRUPTED_SEQUENCE(sequencePutById);
ASSERT_JIT_OFFSET(differenceBetween(hotPathBegin, displacementLabel), patchOffsetPutByIdPropertyMapOffset);
}
void JIT::emitSlow_op_put_by_id(Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
unsigned baseVReg = currentInstruction[1].u.operand;
Identifier* ident = &(m_codeBlock->identifier(currentInstruction[2].u.operand));
unsigned propertyAccessInstructionIndex = m_propertyAccessInstructionIndex++;
linkSlowCaseIfNotJSCell(iter, baseVReg);
linkSlowCase(iter);
JITStubCall stubCall(this, cti_op_put_by_id);
stubCall.addArgument(regT0);
stubCall.addArgument(ImmPtr(ident));
stubCall.addArgument(regT1);
Call call = stubCall.call();
m_propertyAccessCompilationInfo[propertyAccessInstructionIndex].callReturnLocation = call;
}
void JIT::compilePutDirectOffset(RegisterID base, RegisterID value, Structure* structure, size_t cachedOffset)
{
int offset = cachedOffset * sizeof(JSValue);
if (structure->isUsingInlineStorage())
offset += OBJECT_OFFSETOF(JSObject, m_inlineStorage);
else
loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
storePtr(value, Address(base, offset));
}
void JIT::compileGetDirectOffset(RegisterID base, RegisterID result, Structure* structure, size_t cachedOffset)
{
int offset = cachedOffset * sizeof(JSValue);
if (structure->isUsingInlineStorage())
offset += OBJECT_OFFSETOF(JSObject, m_inlineStorage);
else
loadPtr(Address(base, OBJECT_OFFSETOF(JSObject, m_externalStorage)), base);
loadPtr(Address(base, offset), result);
}
void JIT::compileGetDirectOffset(JSObject* base, RegisterID temp, RegisterID result, size_t cachedOffset)
{
if (base->isUsingInlineStorage())
loadPtr(static_cast<void*>(&base->m_inlineStorage[cachedOffset]), result);
else {
PropertyStorage* protoPropertyStorage = &base->m_externalStorage;
loadPtr(static_cast<void*>(protoPropertyStorage), temp);
loadPtr(Address(temp, cachedOffset * sizeof(JSValue)), result);
}
}
void JIT::testPrototype(Structure* structure, JumpList& failureCases)
{
if (structure->m_prototype.isNull())
return;
move(ImmPtr(&asCell(structure->m_prototype)->m_structure), regT2);
move(ImmPtr(asCell(structure->m_prototype)->m_structure), regT3);
failureCases.append(branchPtr(NotEqual, Address(regT2), regT3));
}
void JIT::privateCompilePutByIdTransition(StructureStubInfo* stubInfo, Structure* oldStructure, Structure* newStructure, size_t cachedOffset, StructureChain* chain, ReturnAddressPtr returnAddress)
{
JumpList failureCases;
failureCases.append(emitJumpIfNotJSCell(regT0));
failureCases.append(branchPtr(NotEqual, Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)), ImmPtr(oldStructure)));
testPrototype(oldStructure, failureCases);
for (RefPtr<Structure>* it = chain->head(); *it; ++it)
testPrototype(it->get(), failureCases);
Call callTarget;
bool willNeedStorageRealloc = oldStructure->propertyStorageCapacity() != newStructure->propertyStorageCapacity();
if (willNeedStorageRealloc) {
preserveReturnAddressAfterCall(regT3);
JITStubCall stubCall(this, cti_op_put_by_id_transition_realloc);
stubCall.skipArgument(); stubCall.skipArgument(); stubCall.skipArgument(); stubCall.addArgument(Imm32(oldStructure->propertyStorageCapacity()));
stubCall.addArgument(Imm32(newStructure->propertyStorageCapacity()));
stubCall.call(regT0);
emitGetJITStubArg(2, regT1);
restoreReturnAddressBeforeReturn(regT3);
}
sub32(Imm32(1), AbsoluteAddress(oldStructure->addressOfCount()));
add32(Imm32(1), AbsoluteAddress(newStructure->addressOfCount()));
storePtr(ImmPtr(newStructure), Address(regT0, OBJECT_OFFSETOF(JSCell, m_structure)));
compilePutDirectOffset(regT0, regT1, newStructure, cachedOffset);
ret();
ASSERT(!failureCases.empty());
failureCases.link(this);
restoreArgumentReferenceForTrampoline();
Call failureCall = tailRecursiveCall();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
patchBuffer.link(failureCall, FunctionPtr(cti_op_put_by_id_fail));
if (willNeedStorageRealloc) {
ASSERT(m_calls.size() == 1);
patchBuffer.link(m_calls[0].from, FunctionPtr(cti_op_put_by_id_transition_realloc));
}
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)
{
RepatchBuffer repatchBuffer(codeBlock);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_self_fail));
int offset = sizeof(JSValue) * cachedOffset;
if (structure->isUsingInlineStorage())
repatchBuffer.repatchLoadPtrToLEA(stubInfo->hotPathBegin.instructionAtOffset(patchOffsetGetByIdExternalLoad));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetGetByIdStructure), structure);
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetGetByIdPropertyMapOffset), offset);
}
void JIT::patchMethodCallProto(CodeBlock* codeBlock, MethodCallLinkInfo& methodCallLinkInfo, JSFunction* callee, Structure* structure, JSObject* proto, ReturnAddressPtr returnAddress)
{
RepatchBuffer repatchBuffer(codeBlock);
ASSERT(!methodCallLinkInfo.cachedStructure);
methodCallLinkInfo.cachedStructure = structure;
structure->ref();
Structure* prototypeStructure = proto->structure();
ASSERT(!methodCallLinkInfo.cachedPrototypeStructure);
methodCallLinkInfo.cachedPrototypeStructure = prototypeStructure;
prototypeStructure->ref();
repatchBuffer.repatch(methodCallLinkInfo.structureLabel, structure);
repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoObj), proto);
repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckProtoStruct), prototypeStructure);
repatchBuffer.repatch(methodCallLinkInfo.structureLabel.dataLabelPtrAtOffset(patchOffsetMethodCheckPutFunction), callee);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id));
}
void JIT::patchPutByIdReplace(CodeBlock* codeBlock, StructureStubInfo* stubInfo, Structure* structure, size_t cachedOffset, ReturnAddressPtr returnAddress)
{
RepatchBuffer repatchBuffer(codeBlock);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_put_by_id_generic));
int offset = sizeof(JSValue) * cachedOffset;
if (structure->isUsingInlineStorage())
repatchBuffer.repatchLoadPtrToLEA(stubInfo->hotPathBegin.instructionAtOffset(patchOffsetPutByIdExternalLoad));
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabelPtrAtOffset(patchOffsetPutByIdStructure), structure);
repatchBuffer.repatch(stubInfo->hotPathBegin.dataLabel32AtOffset(patchOffsetPutByIdPropertyMapOffset), offset);
}
void JIT::privateCompilePatchGetArrayLength(ReturnAddressPtr returnAddress)
{
StructureStubInfo* stubInfo = &m_codeBlock->getStubInfo(returnAddress);
Jump failureCases1 = branchPtr(NotEqual, Address(regT0), ImmPtr(m_globalData->jsArrayVPtr));
loadPtr(Address(regT0, OBJECT_OFFSETOF(JSArray, m_storage)), regT2);
load32(Address(regT2, OBJECT_OFFSETOF(ArrayStorage, m_length)), regT2);
Jump failureCases2 = branch32(Above, regT2, Imm32(JSImmediate::maxImmediateInt));
emitFastArithIntToImmNoCheck(regT2, regT0);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
patchBuffer.link(failureCases1, slowCaseBegin);
patchBuffer.link(failureCases2, slowCaseBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
stubInfo->stubRoutine = entryLabel;
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_array_fail));
}
void JIT::privateCompileGetByIdProto(StructureStubInfo* stubInfo, Structure* structure, Structure* prototypeStructure, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
{
JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
Jump failureCases1 = checkStructure(regT0, structure);
Structure** prototypeStructureAddress = &(protoObject->m_structure);
#if CPU(X86_64)
move(ImmPtr(prototypeStructure), regT3);
Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
#else
Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
#endif
compileGetDirectOffset(protoObject, regT1, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
CodeLocationLabel slowCaseBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
patchBuffer.link(failureCases1, slowCaseBegin);
patchBuffer.link(failureCases2, slowCaseBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
stubInfo->stubRoutine = entryLabel;
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
}
void JIT::privateCompileGetByIdSelfList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* polymorphicStructures, int currentIndex, Structure* structure, size_t cachedOffset)
{
Jump failureCase = checkStructure(regT0, structure);
compileGetDirectOffset(regT0, regT0, structure, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
CodeLocationLabel lastProtoBegin = polymorphicStructures->list[currentIndex - 1].stubRoutine;
if (!lastProtoBegin)
lastProtoBegin = stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall);
patchBuffer.link(failureCase, lastProtoBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
structure->ref();
polymorphicStructures->list[currentIndex].set(entryLabel, structure);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
}
void JIT::privateCompileGetByIdProtoList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, Structure* prototypeStructure, size_t cachedOffset, CallFrame* callFrame)
{
JSObject* protoObject = asObject(structure->prototypeForLookup(callFrame));
Jump failureCases1 = checkStructure(regT0, structure);
Structure** prototypeStructureAddress = &(protoObject->m_structure);
#if CPU(X86_64)
move(ImmPtr(prototypeStructure), regT3);
Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3);
#else
Jump failureCases2 = branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(prototypeStructure));
#endif
compileGetDirectOffset(protoObject, regT1, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine;
patchBuffer.link(failureCases1, lastProtoBegin);
patchBuffer.link(failureCases2, lastProtoBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
structure->ref();
prototypeStructure->ref();
prototypeStructures->list[currentIndex].set(entryLabel, structure, prototypeStructure);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
}
void JIT::privateCompileGetByIdChainList(StructureStubInfo* stubInfo, PolymorphicAccessStructureList* prototypeStructures, int currentIndex, Structure* structure, StructureChain* chain, size_t count, size_t cachedOffset, CallFrame* callFrame)
{
ASSERT(count);
JumpList bucketsOfFail;
Jump baseObjectCheck = checkStructure(regT0, structure);
bucketsOfFail.append(baseObjectCheck);
Structure* currStructure = structure;
RefPtr<Structure>* chainEntries = chain->head();
JSObject* protoObject = 0;
for (unsigned i = 0; i < count; ++i) {
protoObject = asObject(currStructure->prototypeForLookup(callFrame));
currStructure = chainEntries[i].get();
Structure** prototypeStructureAddress = &(protoObject->m_structure);
#if CPU(X86_64)
move(ImmPtr(currStructure), regT3);
bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
#else
bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
#endif
}
ASSERT(protoObject);
compileGetDirectOffset(protoObject, regT1, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
CodeLocationLabel lastProtoBegin = prototypeStructures->list[currentIndex - 1].stubRoutine;
patchBuffer.link(bucketsOfFail, lastProtoBegin);
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
structure->ref();
chain->ref();
prototypeStructures->list[currentIndex].set(entryLabel, structure, chain);
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
}
void JIT::privateCompileGetByIdChain(StructureStubInfo* stubInfo, Structure* structure, StructureChain* chain, size_t count, size_t cachedOffset, ReturnAddressPtr returnAddress, CallFrame* callFrame)
{
ASSERT(count);
JumpList bucketsOfFail;
bucketsOfFail.append(checkStructure(regT0, structure));
Structure* currStructure = structure;
RefPtr<Structure>* chainEntries = chain->head();
JSObject* protoObject = 0;
for (unsigned i = 0; i < count; ++i) {
protoObject = asObject(currStructure->prototypeForLookup(callFrame));
currStructure = chainEntries[i].get();
Structure** prototypeStructureAddress = &(protoObject->m_structure);
#if CPU(X86_64)
move(ImmPtr(currStructure), regT3);
bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), regT3));
#else
bucketsOfFail.append(branchPtr(NotEqual, AbsoluteAddress(prototypeStructureAddress), ImmPtr(currStructure)));
#endif
}
ASSERT(protoObject);
compileGetDirectOffset(protoObject, regT1, regT0, cachedOffset);
Jump success = jump();
LinkBuffer patchBuffer(this, m_codeBlock->executablePool());
patchBuffer.link(bucketsOfFail, stubInfo->callReturnLocation.labelAtOffset(-patchOffsetGetByIdSlowCaseCall));
patchBuffer.link(success, stubInfo->hotPathBegin.labelAtOffset(patchOffsetGetByIdPutResult));
CodeLocationLabel entryLabel = patchBuffer.finalizeCodeAddendum();
stubInfo->stubRoutine = entryLabel;
CodeLocationJump jumpLocation = stubInfo->hotPathBegin.jumpAtOffset(patchOffsetGetByIdBranchToSlowCase);
RepatchBuffer repatchBuffer(m_codeBlock);
repatchBuffer.relink(jumpLocation, entryLabel);
repatchBuffer.relinkCallerToFunction(returnAddress, FunctionPtr(cti_op_get_by_id_proto_list));
}
#endif // !ENABLE(JIT_OPTIMIZE_PROPERTY_ACCESS)
#endif // USE(JSVALUE32_64)
}
#endif // ENABLE(JIT)