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darling-JavaScriptCore/jit/JITPropertyAccess32_64.cpp
Ariel Abreu ffed2428ed
JavaScriptCore-7608.4.9.1.3
2020-08-29 15:28:47 -04:00

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47 KiB
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/*
* Copyright (C) 2008-2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(JIT)
#if USE(JSVALUE32_64)
#include "JIT.h"
#include "CodeBlock.h"
#include "DirectArguments.h"
#include "GCAwareJITStubRoutine.h"
#include "InterpreterInlines.h"
#include "JITInlines.h"
#include "JSArray.h"
#include "JSFunction.h"
#include "JSLexicalEnvironment.h"
#include "LinkBuffer.h"
#include "OpcodeInlines.h"
#include "ResultType.h"
#include "SlowPathCall.h"
#include "StructureStubInfo.h"
#include <wtf/StringPrintStream.h>
namespace JSC {
void JIT::emit_op_put_getter_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterById>();
int base = bytecode.m_base.offset();
int property = bytecode.m_property;
int options = bytecode.m_attributes;
int getter = bytecode.m_accessor.offset();
emitLoadPayload(base, regT1);
emitLoadPayload(getter, regT3);
callOperation(operationPutGetterById, regT1, m_codeBlock->identifier(property).impl(), options, regT3);
}
void JIT::emit_op_put_setter_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutSetterById>();
int base = bytecode.m_base.offset();
int property = bytecode.m_property;
int options = bytecode.m_attributes;
int setter = bytecode.m_accessor.offset();
emitLoadPayload(base, regT1);
emitLoadPayload(setter, regT3);
callOperation(operationPutSetterById, regT1, m_codeBlock->identifier(property).impl(), options, regT3);
}
void JIT::emit_op_put_getter_setter_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterSetterById>();
int base = bytecode.m_base.offset();
int property = bytecode.m_property;
int attributes = bytecode.m_attributes;
int getter = bytecode.m_getter.offset();
int setter = bytecode.m_setter.offset();
emitLoadPayload(base, regT1);
emitLoadPayload(getter, regT3);
emitLoadPayload(setter, regT4);
callOperation(operationPutGetterSetter, regT1, m_codeBlock->identifier(property).impl(), attributes, regT3, regT4);
}
void JIT::emit_op_put_getter_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterByVal>();
int base = bytecode.m_base.offset();
int property = bytecode.m_property.offset();
int32_t attributes = bytecode.m_attributes;
int getter = bytecode.m_accessor.offset();
emitLoadPayload(base, regT2);
emitLoad(property, regT1, regT0);
emitLoadPayload(getter, regT3);
callOperation(operationPutGetterByVal, regT2, JSValueRegs(regT1, regT0), attributes, regT3);
}
void JIT::emit_op_put_setter_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutSetterByVal>();
int base = bytecode.m_base.offset();
int property = bytecode.m_property.offset();
int32_t attributes = bytecode.m_attributes;
int setter = bytecode.m_accessor.offset();
emitLoadPayload(base, regT2);
emitLoad(property, regT1, regT0);
emitLoadPayload(setter, regT3);
callOperation(operationPutSetterByVal, regT2, JSValueRegs(regT1, regT0), attributes, regT3);
}
void JIT::emit_op_del_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpDelById>();
int dst = bytecode.m_dst.offset();
int base = bytecode.m_base.offset();
int property = bytecode.m_property;
emitLoad(base, regT1, regT0);
callOperation(operationDeleteByIdJSResult, dst, JSValueRegs(regT1, regT0), m_codeBlock->identifier(property).impl());
}
void JIT::emit_op_del_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpDelByVal>();
int dst = bytecode.m_dst.offset();
int base = bytecode.m_base.offset();
int property = bytecode.m_property.offset();
emitLoad2(base, regT1, regT0, property, regT3, regT2);
callOperation(operationDeleteByValJSResult, dst, JSValueRegs(regT1, regT0), JSValueRegs(regT3, regT2));
}
void JIT::emit_op_get_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByVal>();
auto& metadata = bytecode.metadata(m_codeBlock);
int dst = bytecode.m_dst.offset();
int base = bytecode.m_base.offset();
int property = bytecode.m_property.offset();
ArrayProfile* profile = &metadata.m_arrayProfile;
ByValInfo* byValInfo = m_codeBlock->addByValInfo();
emitLoad2(base, regT1, regT0, property, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(base, regT1);
PatchableJump notIndex = patchableBranch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag));
addSlowCase(notIndex);
emitArrayProfilingSiteWithCell(regT0, regT1, profile);
and32(TrustedImm32(IndexingShapeMask), regT1);
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();
}
addSlowCase(badType);
addSlowCase(slowCases);
Label done = label();
if (!ASSERT_DISABLED) {
Jump resultOK = branchIfNotEmpty(regT1);
abortWithReason(JITGetByValResultIsNotEmpty);
resultOK.link(this);
}
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitStore(dst, regT1, regT0);
Label nextHotPath = label();
m_byValCompilationInfo.append(ByValCompilationInfo(byValInfo, m_bytecodeOffset, notIndex, badType, mode, profile, done, nextHotPath));
}
JITGetByIdGenerator JIT::emitGetByValWithCachedId(ByValInfo* byValInfo, OpGetByVal bytecode, const Identifier& propertyName, Jump& fastDoneCase, Jump& slowDoneCase, JumpList& slowCases)
{
// base: tag(regT1), payload(regT0)
// property: tag(regT3), payload(regT2)
// scratch: regT4
int dst = bytecode.m_dst.offset();
slowCases.append(branchIfNotCell(regT3));
emitByValIdentifierCheck(byValInfo, regT2, regT4, propertyName, slowCases);
const Instruction* currentInstruction = m_codeBlock->instructions().at(byValInfo->bytecodeIndex).ptr();
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(currentInstruction), RegisterSet::stubUnavailableRegisters(),
propertyName.impl(), JSValueRegs::payloadOnly(regT0), JSValueRegs(regT1, regT0), AccessType::Get);
gen.generateFastPath(*this);
fastDoneCase = jump();
Label coldPathBegin = label();
gen.slowPathJump().link(this);
Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByIdOptimize, dst, gen.stubInfo(), JSValueRegs(regT1, regT0), propertyName.impl());
gen.reportSlowPathCall(coldPathBegin, call);
slowDoneCase = jump();
return gen;
}
void JIT::emitSlow_op_get_by_val(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
auto bytecode = currentInstruction->as<OpGetByVal>();
int dst = bytecode.m_dst.offset();
int base = bytecode.m_base.offset();
int property = bytecode.m_property.offset();
ByValInfo* byValInfo = m_byValCompilationInfo[m_byValInstructionIndex].byValInfo;
linkSlowCaseIfNotJSCell(iter, base); // base cell check
linkSlowCase(iter); // property int32 check
Jump nonCell = jump();
linkSlowCase(iter); // base array check
Jump notString = branchIfNotString(regT0);
emitNakedCall(CodeLocationLabel<NoPtrTag>(m_vm->getCTIStub(stringGetByValGenerator).retaggedCode<NoPtrTag>()));
Jump failed = branchTestPtr(Zero, regT0);
emitStoreCell(dst, regT0);
emitJumpSlowToHot(jump(), currentInstruction->size());
failed.link(this);
notString.link(this);
nonCell.link(this);
linkSlowCase(iter); // vector length check
linkSlowCase(iter); // empty value
Label slowPath = label();
emitLoad(base, regT1, regT0);
emitLoad(property, regT3, regT2);
Call call = callOperation(operationGetByValOptimize, dst, JSValueRegs(regT1, regT0), JSValueRegs(regT3, regT2), byValInfo);
m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
m_byValInstructionIndex++;
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
}
void JIT::emit_op_put_by_val_direct(const Instruction* currentInstruction)
{
emit_op_put_by_val<OpPutByValDirect>(currentInstruction);
}
template<typename Op>
void JIT::emit_op_put_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<Op>();
auto& metadata = bytecode.metadata(m_codeBlock);
int base = bytecode.m_base.offset();
int property = bytecode.m_property.offset();
ArrayProfile* profile = &metadata.m_arrayProfile;
ByValInfo* byValInfo = m_codeBlock->addByValInfo();
emitLoad2(base, regT1, regT0, property, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(base, regT1);
PatchableJump notIndex = patchableBranch32(NotEqual, regT3, TrustedImm32(JSValue::Int32Tag));
addSlowCase(notIndex);
emitArrayProfilingSiteWithCell(regT0, regT1, profile);
PatchableJump badType;
JumpList slowCases;
// FIXME: Maybe we should do this inline?
addSlowCase(branchTest32(NonZero, regT1, TrustedImm32(CopyOnWrite)));
and32(TrustedImm32(IndexingShapeMask), regT1);
JITArrayMode mode = chooseArrayMode(profile);
switch (mode) {
case JITInt32:
slowCases = emitInt32PutByVal(bytecode, badType);
break;
case JITDouble:
slowCases = emitDoublePutByVal(bytecode, badType);
break;
case JITContiguous:
slowCases = emitContiguousPutByVal(bytecode, badType);
break;
case JITArrayStorage:
slowCases = emitArrayStoragePutByVal(bytecode, badType);
break;
default:
CRASH();
break;
}
addSlowCase(badType);
addSlowCase(slowCases);
Label done = label();
m_byValCompilationInfo.append(ByValCompilationInfo(byValInfo, m_bytecodeOffset, notIndex, badType, mode, profile, done, done));
}
template <typename Op>
JIT::JumpList JIT::emitGenericContiguousPutByVal(Op bytecode, PatchableJump& badType, IndexingType indexingShape)
{
auto& metadata = bytecode.metadata(m_codeBlock);
int base = bytecode.m_base.offset();
int value = bytecode.m_value.offset();
ArrayProfile* profile = &metadata.m_arrayProfile;
JumpList slowCases;
badType = patchableBranch32(NotEqual, regT1, TrustedImm32(ContiguousShape));
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
Jump outOfBounds = branch32(AboveOrEqual, regT2, Address(regT3, Butterfly::offsetOfPublicLength()));
Label storeResult = label();
emitLoad(value, regT1, regT0);
switch (indexingShape) {
case Int32Shape:
slowCases.append(branchIfNotInt32(regT1));
store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
break;
case ContiguousShape:
store32(regT0, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
store32(regT1, BaseIndex(regT3, regT2, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
emitLoad(base, regT2, regT3);
emitWriteBarrier(base, value, ShouldFilterValue);
break;
case DoubleShape: {
Jump notInt = branchIfNotInt32(regT1);
convertInt32ToDouble(regT0, fpRegT0);
Jump ready = jump();
notInt.link(this);
moveIntsToDouble(regT0, regT1, fpRegT0, fpRegT1);
slowCases.append(branchIfNaN(fpRegT0));
ready.link(this);
storeDouble(fpRegT0, BaseIndex(regT3, regT2, TimesEight));
break;
}
default:
CRASH();
break;
}
Jump done = jump();
outOfBounds.link(this);
slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, Butterfly::offsetOfVectorLength())));
emitArrayProfileStoreToHoleSpecialCase(profile);
add32(TrustedImm32(1), regT2, regT1);
store32(regT1, Address(regT3, Butterfly::offsetOfPublicLength()));
jump().linkTo(storeResult, this);
done.link(this);
return slowCases;
}
template <typename Op>
JIT::JumpList JIT::emitArrayStoragePutByVal(Op bytecode, PatchableJump& badType)
{
auto& metadata = bytecode.metadata(m_codeBlock);
int base = bytecode.m_base.offset();
int value = bytecode.m_value.offset();
ArrayProfile* profile = &metadata.m_arrayProfile;
JumpList slowCases;
badType = patchableBranch32(NotEqual, regT1, TrustedImm32(ArrayStorageShape));
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT3);
slowCases.append(branch32(AboveOrEqual, regT2, Address(regT3, ArrayStorage::vectorLengthOffset())));
Jump empty = branch32(Equal, BaseIndex(regT3, regT2, TimesEight, ArrayStorage::vectorOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), TrustedImm32(JSValue::EmptyValueTag));
Label storeResult(this);
emitLoad(value, regT1, regT0);
store32(regT0, BaseIndex(regT3, regT2, TimesEight, ArrayStorage::vectorOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.payload))); // payload
store32(regT1, BaseIndex(regT3, regT2, TimesEight, ArrayStorage::vectorOffset() + OBJECT_OFFSETOF(JSValue, u.asBits.tag))); // tag
Jump end = jump();
empty.link(this);
emitArrayProfileStoreToHoleSpecialCase(profile);
add32(TrustedImm32(1), Address(regT3, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
branch32(Below, regT2, Address(regT3, ArrayStorage::lengthOffset())).linkTo(storeResult, this);
add32(TrustedImm32(1), regT2, regT0);
store32(regT0, Address(regT3, ArrayStorage::lengthOffset()));
jump().linkTo(storeResult, this);
end.link(this);
emitWriteBarrier(base, value, ShouldFilterValue);
return slowCases;
}
template <typename Op>
JITPutByIdGenerator JIT::emitPutByValWithCachedId(ByValInfo* byValInfo, Op bytecode, PutKind putKind, const Identifier& propertyName, JumpList& doneCases, JumpList& slowCases)
{
// base: tag(regT1), payload(regT0)
// property: tag(regT3), payload(regT2)
int base = bytecode.m_base.offset();
int value = bytecode.m_value.offset();
slowCases.append(branchIfNotCell(regT3));
emitByValIdentifierCheck(byValInfo, regT2, regT2, propertyName, slowCases);
// Write barrier breaks the registers. So after issuing the write barrier,
// reload the registers.
emitWriteBarrier(base, value, ShouldFilterBase);
emitLoadPayload(base, regT0);
emitLoad(value, regT3, regT2);
const Instruction* currentInstruction = m_codeBlock->instructions().at(byValInfo->bytecodeIndex).ptr();
JITPutByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(currentInstruction), RegisterSet::stubUnavailableRegisters(),
JSValueRegs::payloadOnly(regT0), JSValueRegs(regT3, regT2), regT1, m_codeBlock->ecmaMode(), putKind);
gen.generateFastPath(*this);
doneCases.append(jump());
Label coldPathBegin = label();
gen.slowPathJump().link(this);
// JITPutByIdGenerator only preserve the value and the base's payload, we have to reload the tag.
emitLoadTag(base, regT1);
Call call = callOperation(gen.slowPathFunction(), gen.stubInfo(), JSValueRegs(regT3, regT2), JSValueRegs(regT1, regT0), propertyName.impl());
gen.reportSlowPathCall(coldPathBegin, call);
doneCases.append(jump());
return gen;
}
void JIT::emitSlow_op_put_by_val(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
bool isDirect = currentInstruction->opcodeID() == op_put_by_val_direct;
int base;
int property;
int value;
auto load = [&](auto bytecode) {
base = bytecode.m_base.offset();
property = bytecode.m_property.offset();
value = bytecode.m_value.offset();
};
if (isDirect)
load(currentInstruction->as<OpPutByValDirect>());
else
load(currentInstruction->as<OpPutByVal>());
ByValInfo* byValInfo = m_byValCompilationInfo[m_byValInstructionIndex].byValInfo;
linkAllSlowCases(iter);
Label slowPath = label();
// The register selection below is chosen to reduce register swapping on ARM.
// Swapping shouldn't happen on other platforms.
emitLoad(base, regT2, regT1);
emitLoad(property, regT3, regT0);
emitLoad(value, regT5, regT4);
Call call = callOperation(isDirect ? operationDirectPutByValOptimize : operationPutByValOptimize, JSValueRegs(regT2, regT1), JSValueRegs(regT3, regT0), JSValueRegs(regT5, regT4), byValInfo);
m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
m_byValInstructionIndex++;
}
void JIT::emit_op_try_get_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpTryGetById>();
int dst = bytecode.m_dst.offset();
int base = bytecode.m_base.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(currentInstruction), RegisterSet::stubUnavailableRegisters(),
ident->impl(), JSValueRegs::payloadOnly(regT0), JSValueRegs(regT1, regT0), AccessType::TryGet);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitStore(dst, regT1, regT0);
}
void JIT::emitSlow_op_try_get_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpTryGetById>();
int resultVReg = bytecode.m_dst.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
Label coldPathBegin = label();
Call call = callOperation(operationTryGetByIdOptimize, resultVReg, gen.stubInfo(), JSValueRegs(regT1, regT0), ident->impl());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_get_by_id_direct(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByIdDirect>();
int dst = bytecode.m_dst.offset();
int base = bytecode.m_base.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(currentInstruction), RegisterSet::stubUnavailableRegisters(),
ident->impl(), JSValueRegs::payloadOnly(regT0), JSValueRegs(regT1, regT0), AccessType::GetDirect);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitStore(dst, regT1, regT0);
}
void JIT::emitSlow_op_get_by_id_direct(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpGetByIdDirect>();
int resultVReg = bytecode.m_dst.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
Label coldPathBegin = label();
Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByIdDirectOptimize, resultVReg, gen.stubInfo(), JSValueRegs(regT1, regT0), ident->impl());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_get_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetById>();
auto& metadata = bytecode.metadata(m_codeBlock);
int dst = bytecode.m_dst.offset();
int base = bytecode.m_base.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
if (*ident == m_vm->propertyNames->length && shouldEmitProfiling()) {
Jump notArrayLengthMode = branch8(NotEqual, AbsoluteAddress(&metadata.m_modeMetadata.mode), TrustedImm32(static_cast<uint8_t>(GetByIdMode::ArrayLength)));
emitArrayProfilingSiteWithCell(regT0, regT2, &metadata.m_modeMetadata.arrayLengthMode.arrayProfile);
notArrayLengthMode.link(this);
}
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(currentInstruction), RegisterSet::stubUnavailableRegisters(),
ident->impl(), JSValueRegs::payloadOnly(regT0), JSValueRegs(regT1, regT0), AccessType::Get);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitStore(dst, regT1, regT0);
}
void JIT::emitSlow_op_get_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpGetById>();
int resultVReg = bytecode.m_dst.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
Label coldPathBegin = label();
Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByIdOptimize, resultVReg, gen.stubInfo(), JSValueRegs(regT1, regT0), ident->impl());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_get_by_id_with_this(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByIdWithThis>();
int dst = bytecode.m_dst.offset();
int base = bytecode.m_base.offset();
int thisVReg = bytecode.m_thisValue.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitLoad(base, regT1, regT0);
emitLoad(thisVReg, regT4, regT3);
emitJumpSlowCaseIfNotJSCell(base, regT1);
emitJumpSlowCaseIfNotJSCell(thisVReg, regT4);
JITGetByIdWithThisGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(currentInstruction), RegisterSet::stubUnavailableRegisters(),
ident->impl(), JSValueRegs(regT1, regT0), JSValueRegs::payloadOnly(regT0), JSValueRegs(regT4, regT3), AccessType::GetWithThis);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIdsWithThis.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitStore(dst, regT1, regT0);
}
void JIT::emitSlow_op_get_by_id_with_this(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpGetByIdWithThis>();
int resultVReg = bytecode.m_dst.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITGetByIdWithThisGenerator& gen = m_getByIdsWithThis[m_getByIdWithThisIndex++];
Label coldPathBegin = label();
Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByIdWithThisOptimize, resultVReg, gen.stubInfo(), JSValueRegs(regT1, regT0), JSValueRegs(regT4, regT3), ident->impl());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_put_by_id(const Instruction* currentInstruction)
{
// 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
// such that the Structure & offset are always at the same distance from this.
auto bytecode = currentInstruction->as<OpPutById>();
int base = bytecode.m_base.offset();
int value = bytecode.m_value.offset();
bool direct = !!(bytecode.m_flags & PutByIdIsDirect);
emitLoad2(base, regT1, regT0, value, regT3, regT2);
emitJumpSlowCaseIfNotJSCell(base, regT1);
JITPutByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(currentInstruction), RegisterSet::stubUnavailableRegisters(),
JSValueRegs::payloadOnly(regT0), JSValueRegs(regT3, regT2),
regT1, m_codeBlock->ecmaMode(), direct ? Direct : NotDirect);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
emitWriteBarrier(base, value, ShouldFilterBase);
m_putByIds.append(gen);
}
void JIT::emitSlow_op_put_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpPutById>();
int base = bytecode.m_base.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
Label coldPathBegin(this);
// JITPutByIdGenerator only preserve the value and the base's payload, we have to reload the tag.
emitLoadTag(base, regT1);
JITPutByIdGenerator& gen = m_putByIds[m_putByIdIndex++];
Call call = callOperation(
gen.slowPathFunction(), gen.stubInfo(), JSValueRegs(regT3, regT2), JSValueRegs(regT1, regT0), ident->impl());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_in_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpInById>();
int dst = bytecode.m_dst.offset();
int base = bytecode.m_base.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitLoad(base, regT1, regT0);
emitJumpSlowCaseIfNotJSCell(base, regT1);
JITInByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(currentInstruction), RegisterSet::stubUnavailableRegisters(),
ident->impl(), JSValueRegs::payloadOnly(regT0), JSValueRegs(regT1, regT0));
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_inByIds.append(gen);
emitStore(dst, regT1, regT0);
}
void JIT::emitSlow_op_in_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpInById>();
int resultVReg = bytecode.m_dst.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITInByIdGenerator& gen = m_inByIds[m_inByIdIndex++];
Label coldPathBegin = label();
Call call = callOperation(operationInByIdOptimize, resultVReg, gen.stubInfo(), JSValueRegs(regT1, regT0), ident->impl());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emitVarInjectionCheck(bool needsVarInjectionChecks)
{
if (!needsVarInjectionChecks)
return;
addSlowCase(branch8(Equal, AbsoluteAddress(m_codeBlock->globalObject()->varInjectionWatchpoint()->addressOfState()), TrustedImm32(IsInvalidated)));
}
void JIT::emitResolveClosure(int dst, int scope, bool needsVarInjectionChecks, unsigned depth)
{
emitVarInjectionCheck(needsVarInjectionChecks);
move(TrustedImm32(JSValue::CellTag), regT1);
emitLoadPayload(scope, regT0);
for (unsigned i = 0; i < depth; ++i)
loadPtr(Address(regT0, JSScope::offsetOfNext()), regT0);
emitStore(dst, regT1, regT0);
}
void JIT::emit_op_resolve_scope(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpResolveScope>();
auto& metadata = bytecode.metadata(m_codeBlock);
int dst = bytecode.m_dst.offset();
int scope = bytecode.m_scope.offset();
ResolveType resolveType = metadata.m_resolveType;
unsigned depth = metadata.m_localScopeDepth;
auto emitCode = [&] (ResolveType resolveType) {
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
JSScope* constantScope = JSScope::constantScopeForCodeBlock(resolveType, m_codeBlock);
RELEASE_ASSERT(constantScope);
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
load32(&metadata.m_globalLexicalBindingEpoch, regT1);
addSlowCase(branch32(NotEqual, AbsoluteAddress(m_codeBlock->globalObject()->addressOfGlobalLexicalBindingEpoch()), regT1));
move(TrustedImm32(JSValue::CellTag), regT1);
move(TrustedImmPtr(constantScope), regT0);
emitStore(dst, regT1, regT0);
break;
}
case GlobalVar:
case GlobalVarWithVarInjectionChecks:
case GlobalLexicalVar:
case GlobalLexicalVarWithVarInjectionChecks: {
JSScope* constantScope = JSScope::constantScopeForCodeBlock(resolveType, m_codeBlock);
RELEASE_ASSERT(constantScope);
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
move(TrustedImm32(JSValue::CellTag), regT1);
move(TrustedImmPtr(constantScope), regT0);
emitStore(dst, regT1, regT0);
break;
}
case ClosureVar:
case ClosureVarWithVarInjectionChecks:
emitResolveClosure(dst, scope, needsVarInjectionChecks(resolveType), depth);
break;
case ModuleVar:
move(TrustedImm32(JSValue::CellTag), regT1);
move(TrustedImmPtr(metadata.m_lexicalEnvironment.get()), regT0);
emitStore(dst, regT1, regT0);
break;
case Dynamic:
addSlowCase(jump());
break;
case LocalClosureVar:
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks:
RELEASE_ASSERT_NOT_REACHED();
}
};
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_resolveType, regT0);
Jump notGlobalProperty = branch32(NotEqual, regT0, TrustedImm32(resolveType));
emitCode(resolveType);
skipToEnd.append(jump());
notGlobalProperty.link(this);
emitCode(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar);
skipToEnd.link(this);
break;
}
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_resolveType, regT0);
Jump notGlobalProperty = branch32(NotEqual, regT0, TrustedImm32(GlobalProperty));
emitCode(GlobalProperty);
skipToEnd.append(jump());
notGlobalProperty.link(this);
Jump notGlobalPropertyWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalPropertyWithVarInjectionChecks));
emitCode(GlobalPropertyWithVarInjectionChecks);
skipToEnd.append(jump());
notGlobalPropertyWithVarInjections.link(this);
Jump notGlobalLexicalVar = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVar));
emitCode(GlobalLexicalVar);
skipToEnd.append(jump());
notGlobalLexicalVar.link(this);
Jump notGlobalLexicalVarWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVarWithVarInjectionChecks));
emitCode(GlobalLexicalVarWithVarInjectionChecks);
skipToEnd.append(jump());
notGlobalLexicalVarWithVarInjections.link(this);
addSlowCase(jump());
skipToEnd.link(this);
break;
}
default:
emitCode(resolveType);
break;
}
}
void JIT::emitLoadWithStructureCheck(int scope, Structure** structureSlot)
{
emitLoad(scope, regT1, regT0);
loadPtr(structureSlot, regT2);
addSlowCase(branchPtr(NotEqual, Address(regT0, JSCell::structureIDOffset()), regT2));
}
void JIT::emitGetVarFromPointer(JSValue* operand, GPRReg tag, GPRReg payload)
{
uintptr_t rawAddress = bitwise_cast<uintptr_t>(operand);
load32(bitwise_cast<void*>(rawAddress + TagOffset), tag);
load32(bitwise_cast<void*>(rawAddress + PayloadOffset), payload);
}
void JIT::emitGetVarFromIndirectPointer(JSValue** operand, GPRReg tag, GPRReg payload)
{
loadPtr(operand, payload);
load32(Address(payload, TagOffset), tag);
load32(Address(payload, PayloadOffset), payload);
}
void JIT::emitGetClosureVar(int scope, uintptr_t operand)
{
emitLoad(scope, regT1, regT0);
load32(Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register) + TagOffset), regT1);
load32(Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register) + PayloadOffset), regT0);
}
void JIT::emit_op_get_from_scope(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetFromScope>();
auto& metadata = bytecode.metadata(m_codeBlock);
int dst = bytecode.m_dst.offset();
int scope = bytecode.m_scope.offset();
ResolveType resolveType = metadata.m_getPutInfo.resolveType();
Structure** structureSlot = metadata.m_structure.slot();
uintptr_t* operandSlot = reinterpret_cast<uintptr_t*>(&metadata.m_operand);
auto emitCode = [&] (ResolveType resolveType, bool indirectLoadForOperand) {
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
emitLoadWithStructureCheck(scope, structureSlot); // Structure check covers var injection.
GPRReg base = regT2;
GPRReg resultTag = regT1;
GPRReg resultPayload = regT0;
GPRReg offset = regT3;
move(regT0, base);
load32(operandSlot, offset);
if (!ASSERT_DISABLED) {
Jump isOutOfLine = branch32(GreaterThanOrEqual, offset, TrustedImm32(firstOutOfLineOffset));
abortWithReason(JITOffsetIsNotOutOfLine);
isOutOfLine.link(this);
}
loadPtr(Address(base, JSObject::butterflyOffset()), base);
neg32(offset);
load32(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.payload) + (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), resultPayload);
load32(BaseIndex(base, offset, TimesEight, OBJECT_OFFSETOF(JSValue, u.asBits.tag) + (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), resultTag);
break;
}
case GlobalVar:
case GlobalVarWithVarInjectionChecks:
case GlobalLexicalVar:
case GlobalLexicalVarWithVarInjectionChecks:
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
if (indirectLoadForOperand)
emitGetVarFromIndirectPointer(bitwise_cast<JSValue**>(operandSlot), regT1, regT0);
else
emitGetVarFromPointer(bitwise_cast<JSValue*>(*operandSlot), regT1, regT0);
if (resolveType == GlobalLexicalVar || resolveType == GlobalLexicalVarWithVarInjectionChecks) // TDZ check.
addSlowCase(branchIfEmpty(regT1));
break;
case ClosureVar:
case ClosureVarWithVarInjectionChecks:
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
emitGetClosureVar(scope, *operandSlot);
break;
case Dynamic:
addSlowCase(jump());
break;
case ModuleVar:
case LocalClosureVar:
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks:
RELEASE_ASSERT_NOT_REACHED();
}
};
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_getPutInfo, regT0);
and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0
Jump isNotGlobalProperty = branch32(NotEqual, regT0, TrustedImm32(resolveType));
emitCode(resolveType, false);
skipToEnd.append(jump());
isNotGlobalProperty.link(this);
emitCode(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar, true);
skipToEnd.link(this);
break;
}
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_getPutInfo, regT0);
and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0
Jump isGlobalProperty = branch32(Equal, regT0, TrustedImm32(GlobalProperty));
Jump notGlobalPropertyWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalPropertyWithVarInjectionChecks));
isGlobalProperty.link(this);
emitCode(GlobalProperty, false);
skipToEnd.append(jump());
notGlobalPropertyWithVarInjections.link(this);
Jump notGlobalLexicalVar = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVar));
emitCode(GlobalLexicalVar, true);
skipToEnd.append(jump());
notGlobalLexicalVar.link(this);
Jump notGlobalLexicalVarWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVarWithVarInjectionChecks));
emitCode(GlobalLexicalVarWithVarInjectionChecks, true);
skipToEnd.append(jump());
notGlobalLexicalVarWithVarInjections.link(this);
addSlowCase(jump());
skipToEnd.link(this);
break;
}
default:
emitCode(resolveType, false);
break;
}
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitStore(dst, regT1, regT0);
}
void JIT::emitSlow_op_get_from_scope(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpGetFromScope>();
int dst = bytecode.m_dst.offset();
callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetFromScope, dst, currentInstruction);
}
void JIT::emitPutGlobalVariable(JSValue* operand, int value, WatchpointSet* set)
{
emitLoad(value, regT1, regT0);
emitNotifyWrite(set);
uintptr_t rawAddress = bitwise_cast<uintptr_t>(operand);
store32(regT1, bitwise_cast<void*>(rawAddress + TagOffset));
store32(regT0, bitwise_cast<void*>(rawAddress + PayloadOffset));
}
void JIT::emitPutGlobalVariableIndirect(JSValue** addressOfOperand, int value, WatchpointSet** indirectWatchpointSet)
{
emitLoad(value, regT1, regT0);
loadPtr(indirectWatchpointSet, regT2);
emitNotifyWrite(regT2);
loadPtr(addressOfOperand, regT2);
store32(regT1, Address(regT2, TagOffset));
store32(regT0, Address(regT2, PayloadOffset));
}
void JIT::emitPutClosureVar(int scope, uintptr_t operand, int value, WatchpointSet* set)
{
emitLoad(value, regT3, regT2);
emitLoad(scope, regT1, regT0);
emitNotifyWrite(set);
store32(regT3, Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register) + TagOffset));
store32(regT2, Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register) + PayloadOffset));
}
void JIT::emit_op_put_to_scope(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutToScope>();
auto& metadata = bytecode.metadata(m_codeBlock);
int scope = bytecode.m_scope.offset();
int value = bytecode.m_value.offset();
GetPutInfo getPutInfo = copiedGetPutInfo(bytecode);
ResolveType resolveType = getPutInfo.resolveType();
Structure** structureSlot = metadata.m_structure.slot();
uintptr_t* operandSlot = reinterpret_cast<uintptr_t*>(&metadata.m_operand);
auto emitCode = [&] (ResolveType resolveType, bool indirectLoadForOperand) {
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
emitWriteBarrier(m_codeBlock->globalObject(), value, ShouldFilterValue);
emitLoadWithStructureCheck(scope, structureSlot); // Structure check covers var injection.
emitLoad(value, regT3, regT2);
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT0);
loadPtr(operandSlot, regT1);
negPtr(regT1);
store32(regT3, BaseIndex(regT0, regT1, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)));
store32(regT2, BaseIndex(regT0, regT1, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)));
break;
}
case GlobalVar:
case GlobalVarWithVarInjectionChecks:
case GlobalLexicalVar:
case GlobalLexicalVarWithVarInjectionChecks: {
JSScope* constantScope = JSScope::constantScopeForCodeBlock(resolveType, m_codeBlock);
RELEASE_ASSERT(constantScope);
emitWriteBarrier(constantScope, value, ShouldFilterValue);
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
if (!isInitialization(getPutInfo.initializationMode()) && (resolveType == GlobalLexicalVar || resolveType == GlobalLexicalVarWithVarInjectionChecks)) {
// We need to do a TDZ check here because we can't always prove we need to emit TDZ checks statically.
if (indirectLoadForOperand)
emitGetVarFromIndirectPointer(bitwise_cast<JSValue**>(operandSlot), regT1, regT0);
else
emitGetVarFromPointer(bitwise_cast<JSValue*>(*operandSlot), regT1, regT0);
addSlowCase(branchIfEmpty(regT1));
}
if (indirectLoadForOperand)
emitPutGlobalVariableIndirect(bitwise_cast<JSValue**>(operandSlot), value, &metadata.m_watchpointSet);
else
emitPutGlobalVariable(bitwise_cast<JSValue*>(*operandSlot), value, metadata.m_watchpointSet);
break;
}
case LocalClosureVar:
case ClosureVar:
case ClosureVarWithVarInjectionChecks:
emitWriteBarrier(scope, value, ShouldFilterValue);
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
emitPutClosureVar(scope, *operandSlot, value, metadata.m_watchpointSet);
break;
case ModuleVar:
case Dynamic:
addSlowCase(jump());
break;
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks:
RELEASE_ASSERT_NOT_REACHED();
}
};
switch (resolveType) {
case GlobalProperty:
case GlobalPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_getPutInfo, regT0);
and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0
Jump isGlobalProperty = branch32(Equal, regT0, TrustedImm32(resolveType));
Jump isGlobalLexicalVar = branch32(Equal, regT0, TrustedImm32(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar));
addSlowCase(jump()); // Dynamic, it can happen if we attempt to put a value to already-initialized const binding.
isGlobalLexicalVar.link(this);
emitCode(needsVarInjectionChecks(resolveType) ? GlobalLexicalVarWithVarInjectionChecks : GlobalLexicalVar, true);
skipToEnd.append(jump());
isGlobalProperty.link(this);
emitCode(resolveType, false);
skipToEnd.link(this);
break;
}
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks: {
JumpList skipToEnd;
load32(&metadata.m_getPutInfo, regT0);
and32(TrustedImm32(GetPutInfo::typeBits), regT0); // Load ResolveType into T0
Jump isGlobalProperty = branch32(Equal, regT0, TrustedImm32(GlobalProperty));
Jump notGlobalPropertyWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalPropertyWithVarInjectionChecks));
isGlobalProperty.link(this);
emitCode(GlobalProperty, false);
skipToEnd.append(jump());
notGlobalPropertyWithVarInjections.link(this);
Jump notGlobalLexicalVar = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVar));
emitCode(GlobalLexicalVar, true);
skipToEnd.append(jump());
notGlobalLexicalVar.link(this);
Jump notGlobalLexicalVarWithVarInjections = branch32(NotEqual, regT0, TrustedImm32(GlobalLexicalVarWithVarInjectionChecks));
emitCode(GlobalLexicalVarWithVarInjectionChecks, true);
skipToEnd.append(jump());
notGlobalLexicalVarWithVarInjections.link(this);
addSlowCase(jump());
skipToEnd.link(this);
break;
}
default:
emitCode(resolveType, false);
break;
}
}
void JIT::emitSlow_op_put_to_scope(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpPutToScope>();
ResolveType resolveType = copiedGetPutInfo(bytecode).resolveType();
if (resolveType == ModuleVar) {
JITSlowPathCall slowPathCall(this, currentInstruction, slow_path_throw_strict_mode_readonly_property_write_error);
slowPathCall.call();
} else
callOperation(operationPutToScope, currentInstruction);
}
void JIT::emit_op_get_from_arguments(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetFromArguments>();
int dst = bytecode.m_dst.offset();
int arguments = bytecode.m_arguments.offset();
int index = bytecode.m_index;
emitLoadPayload(arguments, regT0);
load32(Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + TagOffset), regT1);
load32(Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + PayloadOffset), regT0);
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitStore(dst, regT1, regT0);
}
void JIT::emit_op_put_to_arguments(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutToArguments>();
int arguments = bytecode.m_arguments.offset();
int index = bytecode.m_index;
int value = bytecode.m_value.offset();
emitWriteBarrier(arguments, value, ShouldFilterValue);
emitLoadPayload(arguments, regT0);
emitLoad(value, regT1, regT2);
store32(regT1, Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + TagOffset));
store32(regT2, Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>) + PayloadOffset));
}
} // namespace JSC
#endif // USE(JSVALUE32_64)
#endif // ENABLE(JIT)
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