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

1915 lines
72 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)
#include "JIT.h"
#include "CodeBlock.h"
#include "DirectArguments.h"
#include "GCAwareJITStubRoutine.h"
#include "GetterSetter.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 "ScopedArguments.h"
#include "ScopedArgumentsTable.h"
#include "SlowPathCall.h"
#include "StructureStubInfo.h"
#include "ThunkGenerators.h"
#include <wtf/ScopedLambda.h>
#include <wtf/StringPrintStream.h>
namespace JSC {
#if USE(JSVALUE64)
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();
emitGetVirtualRegister(base, regT0);
bool propertyNameIsIntegerConstant = isOperandConstantInt(property);
if (propertyNameIsIntegerConstant)
move(Imm32(getOperandConstantInt(property)), regT1);
else
emitGetVirtualRegister(property, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, base);
PatchableJump notIndex;
if (!propertyNameIsIntegerConstant) {
notIndex = emitPatchableJumpIfNotInt(regT1);
addSlowCase(notIndex);
// This is technically incorrect - we're zero-extending an int32. On the hot path this doesn't matter.
// We check the value as if it was a uint32 against the m_vectorLength - which will always fail if
// number was signed since m_vectorLength is always less than intmax (since the total allocation
// size is always less than 4Gb). As such zero extending will have been correct (and extending the value
// to 64-bits is necessary since it's used in the address calculation). We zero extend rather than sign
// extending since it makes it easier to re-tag the value in the slow case.
zeroExtend32ToPtr(regT1, regT1);
}
emitArrayProfilingSiteWithCell(regT0, regT2, profile);
and32(TrustedImm32(IndexingShapeMask), regT2);
PatchableJump badType;
JumpList slowCases;
JITArrayMode mode = chooseArrayMode(profile);
switch (mode) {
case JITInt32:
slowCases = emitInt32GetByVal(currentInstruction, badType);
break;
case JITDouble:
slowCases = emitDoubleGetByVal(currentInstruction, badType);
break;
case JITContiguous:
slowCases = emitContiguousGetByVal(currentInstruction, badType);
break;
case JITArrayStorage:
slowCases = emitArrayStorageGetByVal(currentInstruction, badType);
break;
default:
CRASH();
break;
}
addSlowCase(badType);
addSlowCase(slowCases);
Label done = label();
if (!ASSERT_DISABLED) {
Jump resultOK = branchIfNotEmpty(regT0);
abortWithReason(JITGetByValResultIsNotEmpty);
resultOK.link(this);
}
emitValueProfilingSite(metadata);
emitPutVirtualRegister(dst);
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: regT0
// property: regT1
// scratch: regT3
int dst = bytecode.m_dst.offset();
slowCases.append(branchIfNotCell(regT1));
emitByValIdentifierCheck(byValInfo, regT1, regT3, propertyName, slowCases);
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(m_bytecodeOffset), RegisterSet::stubUnavailableRegisters(),
propertyName.impl(), JSValueRegs(regT0), JSValueRegs(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(), 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
if (!isOperandConstantInt(property))
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 = branchTest64(Zero, regT0);
emitPutVirtualRegister(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();
emitGetVirtualRegister(base, regT0);
emitGetVirtualRegister(property, regT1);
Call call = callOperation(operationGetByValOptimize, dst, regT0, regT1, 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();
emitGetVirtualRegister(base, regT0);
bool propertyNameIsIntegerConstant = isOperandConstantInt(property);
if (propertyNameIsIntegerConstant)
move(Imm32(getOperandConstantInt(property)), regT1);
else
emitGetVirtualRegister(property, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, base);
PatchableJump notIndex;
if (!propertyNameIsIntegerConstant) {
notIndex = emitPatchableJumpIfNotInt(regT1);
addSlowCase(notIndex);
// See comment in op_get_by_val.
zeroExtend32ToPtr(regT1, regT1);
}
emitArrayProfilingSiteWithCell(regT0, regT2, profile);
PatchableJump badType;
JumpList slowCases;
// FIXME: Maybe we should do this inline?
addSlowCase(branchTest32(NonZero, regT2, TrustedImm32(CopyOnWrite)));
and32(TrustedImm32(IndexingShapeMask), regT2);
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 value = bytecode.m_value.offset();
ArrayProfile* profile = &metadata.m_arrayProfile;
JumpList slowCases;
badType = patchableBranch32(NotEqual, regT2, TrustedImm32(indexingShape));
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2);
Jump outOfBounds = branch32(AboveOrEqual, regT1, Address(regT2, Butterfly::offsetOfPublicLength()));
Label storeResult = label();
emitGetVirtualRegister(value, regT3);
switch (indexingShape) {
case Int32Shape:
slowCases.append(branchIfNotInt32(regT3));
store64(regT3, BaseIndex(regT2, regT1, TimesEight));
break;
case DoubleShape: {
Jump notInt = branchIfNotInt32(regT3);
convertInt32ToDouble(regT3, fpRegT0);
Jump ready = jump();
notInt.link(this);
add64(tagTypeNumberRegister, regT3);
move64ToDouble(regT3, fpRegT0);
slowCases.append(branchIfNaN(fpRegT0));
ready.link(this);
storeDouble(fpRegT0, BaseIndex(regT2, regT1, TimesEight));
break;
}
case ContiguousShape:
store64(regT3, BaseIndex(regT2, regT1, TimesEight));
emitWriteBarrier(bytecode.m_base.offset(), value, ShouldFilterValue);
break;
default:
CRASH();
break;
}
Jump done = jump();
outOfBounds.link(this);
slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, Butterfly::offsetOfVectorLength())));
emitArrayProfileStoreToHoleSpecialCase(profile);
add32(TrustedImm32(1), regT1, regT3);
store32(regT3, Address(regT2, Butterfly::offsetOfPublicLength()));
jump().linkTo(storeResult, this);
done.link(this);
return slowCases;
}
template<typename Op>
JIT::JumpList JIT::emitArrayStoragePutByVal(Op bytecode, PatchableJump& badType)
{
auto& metadata = bytecode.metadata(m_codeBlock);
int value = bytecode.m_value.offset();
ArrayProfile* profile = &metadata.m_arrayProfile;
JumpList slowCases;
badType = patchableBranch32(NotEqual, regT2, TrustedImm32(ArrayStorageShape));
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT2);
slowCases.append(branch32(AboveOrEqual, regT1, Address(regT2, ArrayStorage::vectorLengthOffset())));
Jump empty = branchTest64(Zero, BaseIndex(regT2, regT1, TimesEight, ArrayStorage::vectorOffset()));
Label storeResult(this);
emitGetVirtualRegister(value, regT3);
store64(regT3, BaseIndex(regT2, regT1, TimesEight, ArrayStorage::vectorOffset()));
emitWriteBarrier(bytecode.m_base.offset(), value, ShouldFilterValue);
Jump end = jump();
empty.link(this);
emitArrayProfileStoreToHoleSpecialCase(profile);
add32(TrustedImm32(1), Address(regT2, ArrayStorage::numValuesInVectorOffset()));
branch32(Below, regT1, Address(regT2, ArrayStorage::lengthOffset())).linkTo(storeResult, this);
add32(TrustedImm32(1), regT1);
store32(regT1, Address(regT2, ArrayStorage::lengthOffset()));
sub32(TrustedImm32(1), regT1);
jump().linkTo(storeResult, this);
end.link(this);
return slowCases;
}
template<typename Op>
JITPutByIdGenerator JIT::emitPutByValWithCachedId(ByValInfo* byValInfo, Op bytecode, PutKind putKind, const Identifier& propertyName, JumpList& doneCases, JumpList& slowCases)
{
// base: regT0
// property: regT1
// scratch: regT2
int base = bytecode.m_base.offset();
int value = bytecode.m_value.offset();
slowCases.append(branchIfNotCell(regT1));
emitByValIdentifierCheck(byValInfo, regT1, regT1, propertyName, slowCases);
// Write barrier breaks the registers. So after issuing the write barrier,
// reload the registers.
emitGetVirtualRegisters(base, regT0, value, regT1);
JITPutByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(m_bytecodeOffset), RegisterSet::stubUnavailableRegisters(),
JSValueRegs(regT0), JSValueRegs(regT1), regT2, m_codeBlock->ecmaMode(), putKind);
gen.generateFastPath(*this);
emitWriteBarrier(base, value, ShouldFilterBase);
doneCases.append(jump());
Label coldPathBegin = label();
gen.slowPathJump().link(this);
Call call = callOperation(gen.slowPathFunction(), gen.stubInfo(), 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();
emitGetVirtualRegister(base, regT0);
emitGetVirtualRegister(property, regT1);
emitGetVirtualRegister(value, regT2);
Call call = callOperation(isDirect ? operationDirectPutByValOptimize : operationPutByValOptimize, regT0, regT1, regT2, byValInfo);
m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
m_byValInstructionIndex++;
}
void JIT::emit_op_put_getter_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterById>();
emitGetVirtualRegister(bytecode.m_base.offset(), regT0);
int32_t options = bytecode.m_attributes;
emitGetVirtualRegister(bytecode.m_accessor.offset(), regT1);
callOperation(operationPutGetterById, regT0, m_codeBlock->identifier(bytecode.m_property).impl(), options, regT1);
}
void JIT::emit_op_put_setter_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutSetterById>();
emitGetVirtualRegister(bytecode.m_base.offset(), regT0);
int32_t options = bytecode.m_attributes;
emitGetVirtualRegister(bytecode.m_accessor.offset(), regT1);
callOperation(operationPutSetterById, regT0, m_codeBlock->identifier(bytecode.m_property).impl(), options, regT1);
}
void JIT::emit_op_put_getter_setter_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterSetterById>();
emitGetVirtualRegister(bytecode.m_base.offset(), regT0);
int32_t attribute = bytecode.m_attributes;
emitGetVirtualRegister(bytecode.m_getter.offset(), regT1);
emitGetVirtualRegister(bytecode.m_setter.offset(), regT2);
callOperation(operationPutGetterSetter, regT0, m_codeBlock->identifier(bytecode.m_property).impl(), attribute, regT1, regT2);
}
void JIT::emit_op_put_getter_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutGetterByVal>();
emitGetVirtualRegister(bytecode.m_base.offset(), regT0);
emitGetVirtualRegister(bytecode.m_property.offset(), regT1);
int32_t attributes = bytecode.m_attributes;
emitGetVirtualRegister(bytecode.m_accessor, regT2);
callOperation(operationPutGetterByVal, regT0, regT1, attributes, regT2);
}
void JIT::emit_op_put_setter_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutSetterByVal>();
emitGetVirtualRegister(bytecode.m_base.offset(), regT0);
emitGetVirtualRegister(bytecode.m_property.offset(), regT1);
int32_t attributes = bytecode.m_attributes;
emitGetVirtualRegister(bytecode.m_accessor.offset(), regT2);
callOperation(operationPutSetterByVal, regT0, regT1, attributes, regT2);
}
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;
emitGetVirtualRegister(base, regT0);
callOperation(operationDeleteByIdJSResult, dst, 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();
emitGetVirtualRegister(base, regT0);
emitGetVirtualRegister(property, regT1);
callOperation(operationDeleteByValJSResult, dst, regT0, regT1);
}
void JIT::emit_op_try_get_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpTryGetById>();
int resultVReg = bytecode.m_dst.offset();
int baseVReg = bytecode.m_base.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitGetVirtualRegister(baseVReg, regT0);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(m_bytecodeOffset), RegisterSet::stubUnavailableRegisters(),
ident->impl(), JSValueRegs(regT0), JSValueRegs(regT0), AccessType::TryGet);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitPutVirtualRegister(resultVReg);
}
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(), regT0, ident->impl());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_get_by_id_direct(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByIdDirect>();
int resultVReg = bytecode.m_dst.offset();
int baseVReg = bytecode.m_base.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitGetVirtualRegister(baseVReg, regT0);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(m_bytecodeOffset), RegisterSet::stubUnavailableRegisters(),
ident->impl(), JSValueRegs(regT0), JSValueRegs(regT0), AccessType::GetDirect);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitPutVirtualRegister(resultVReg);
}
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(), 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 resultVReg = bytecode.m_dst.offset();
int baseVReg = bytecode.m_base.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitGetVirtualRegister(baseVReg, regT0);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
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, regT1, &metadata.m_modeMetadata.arrayLengthMode.arrayProfile);
notArrayLengthMode.link(this);
}
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(m_bytecodeOffset), RegisterSet::stubUnavailableRegisters(),
ident->impl(), JSValueRegs(regT0), JSValueRegs(regT0), AccessType::Get);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitPutVirtualRegister(resultVReg);
}
void JIT::emit_op_get_by_id_with_this(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByIdWithThis>();
int resultVReg = bytecode.m_dst.offset();
int baseVReg = bytecode.m_base.offset();
int thisVReg = bytecode.m_thisValue.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitGetVirtualRegister(baseVReg, regT0);
emitGetVirtualRegister(thisVReg, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
emitJumpSlowCaseIfNotJSCell(regT1, thisVReg);
JITGetByIdWithThisGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(m_bytecodeOffset), RegisterSet::stubUnavailableRegisters(),
ident->impl(), JSValueRegs(regT0), JSValueRegs(regT0), JSValueRegs(regT1), AccessType::GetWithThis);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIdsWithThis.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitPutVirtualRegister(resultVReg);
}
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(), regT0, ident->impl());
gen.reportSlowPathCall(coldPathBegin, call);
}
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(), regT0, regT1, ident->impl());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_put_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutById>();
int baseVReg = bytecode.m_base.offset();
int valueVReg = bytecode.m_value.offset();
bool direct = !!(bytecode.m_flags & PutByIdIsDirect);
// 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.
emitGetVirtualRegisters(baseVReg, regT0, valueVReg, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
JITPutByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(m_bytecodeOffset), RegisterSet::stubUnavailableRegisters(),
JSValueRegs(regT0), JSValueRegs(regT1), regT2, m_codeBlock->ecmaMode(),
direct ? Direct : NotDirect);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
emitWriteBarrier(baseVReg, valueVReg, 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>();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
Label coldPathBegin(this);
JITPutByIdGenerator& gen = m_putByIds[m_putByIdIndex++];
Call call = callOperation(gen.slowPathFunction(), gen.stubInfo(), regT1, regT0, ident->impl());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_in_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpInById>();
int resultVReg = bytecode.m_dst.offset();
int baseVReg = bytecode.m_base.offset();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitGetVirtualRegister(baseVReg, regT0);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
JITInByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeOffset), CallSiteIndex(m_bytecodeOffset), RegisterSet::stubUnavailableRegisters(),
ident->impl(), JSValueRegs(regT0), JSValueRegs(regT0));
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_inByIds.append(gen);
emitPutVirtualRegister(resultVReg);
}
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(), 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);
emitGetVirtualRegister(scope, regT0);
for (unsigned i = 0; i < depth; ++i)
loadPtr(Address(regT0, JSScope::offsetOfNext()), regT0);
emitPutVirtualRegister(dst);
}
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(TrustedImmPtr(constantScope), regT0);
emitPutVirtualRegister(dst);
break;
}
case GlobalVar:
case GlobalVarWithVarInjectionChecks:
case GlobalLexicalVar:
case GlobalLexicalVarWithVarInjectionChecks: {
JSScope* constantScope = JSScope::constantScopeForCodeBlock(resolveType, m_codeBlock);
RELEASE_ASSERT(constantScope);
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
move(TrustedImmPtr(constantScope), regT0);
emitPutVirtualRegister(dst);
break;
}
case ClosureVar:
case ClosureVarWithVarInjectionChecks:
emitResolveClosure(dst, scope, needsVarInjectionChecks(resolveType), depth);
break;
case ModuleVar:
move(TrustedImmPtr(metadata.m_lexicalEnvironment.get()), regT0);
emitPutVirtualRegister(dst);
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)
{
loadPtr(structureSlot, regT1);
emitGetVirtualRegister(scope, regT0);
addSlowCase(branchTestPtr(Zero, regT1));
load32(Address(regT1, Structure::structureIDOffset()), regT1);
addSlowCase(branch32(NotEqual, Address(regT0, JSCell::structureIDOffset()), regT1));
}
void JIT::emitGetVarFromPointer(JSValue* operand, GPRReg reg)
{
loadPtr(operand, reg);
}
void JIT::emitGetVarFromIndirectPointer(JSValue** operand, GPRReg reg)
{
loadPtr(operand, reg);
loadPtr(reg, reg);
}
void JIT::emitGetClosureVar(int scope, uintptr_t operand)
{
emitGetVirtualRegister(scope, regT0);
loadPtr(Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register)), 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 since we don't cache structures for anything but the GlobalObject. Additionally, resolve_scope handles checking for the var injection.
GPRReg base = regT0;
GPRReg result = regT0;
GPRReg offset = regT1;
GPRReg scratch = regT2;
jitAssert(scopedLambda<Jump(void)>([&] () -> Jump {
return branchPtr(Equal, base, TrustedImmPtr(m_codeBlock->globalObject()));
}));
load32(operandSlot, offset);
if (!ASSERT_DISABLED) {
Jump isOutOfLine = branch32(GreaterThanOrEqual, offset, TrustedImm32(firstOutOfLineOffset));
abortWithReason(JITOffsetIsNotOutOfLine);
isOutOfLine.link(this);
}
loadPtr(Address(base, JSObject::butterflyOffset()), scratch);
neg32(offset);
signExtend32ToPtr(offset, offset);
load64(BaseIndex(scratch, offset, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)), result);
break;
}
case GlobalVar:
case GlobalVarWithVarInjectionChecks:
case GlobalLexicalVar:
case GlobalLexicalVarWithVarInjectionChecks:
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
if (indirectLoadForOperand)
emitGetVarFromIndirectPointer(bitwise_cast<JSValue**>(operandSlot), regT0);
else
emitGetVarFromPointer(bitwise_cast<JSValue*>(*operandSlot), regT0);
if (resolveType == GlobalLexicalVar || resolveType == GlobalLexicalVarWithVarInjectionChecks) // TDZ check.
addSlowCase(branchIfEmpty(regT0));
break;
case ClosureVar:
case ClosureVarWithVarInjectionChecks:
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
emitGetClosureVar(scope, *operandSlot);
break;
case Dynamic:
addSlowCase(jump());
break;
case LocalClosureVar:
case ModuleVar:
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;
}
emitPutVirtualRegister(dst);
emitValueProfilingSite(metadata);
}
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)
{
emitGetVirtualRegister(value, regT0);
emitNotifyWrite(set);
storePtr(regT0, operand);
}
void JIT::emitPutGlobalVariableIndirect(JSValue** addressOfOperand, int value, WatchpointSet** indirectWatchpointSet)
{
emitGetVirtualRegister(value, regT0);
loadPtr(indirectWatchpointSet, regT1);
emitNotifyWrite(regT1);
loadPtr(addressOfOperand, regT1);
storePtr(regT0, regT1);
}
void JIT::emitPutClosureVar(int scope, uintptr_t operand, int value, WatchpointSet* set)
{
emitGetVirtualRegister(value, regT1);
emitGetVirtualRegister(scope, regT0);
emitNotifyWrite(set);
storePtr(regT1, Address(regT0, JSLexicalEnvironment::offsetOfVariables() + operand * sizeof(Register)));
}
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: {
emitLoadWithStructureCheck(scope, structureSlot); // Structure check covers var injection since we don't cache structures for anything but the GlobalObject. Additionally, resolve_scope handles checking for the var injection.
emitGetVirtualRegister(value, regT2);
jitAssert(scopedLambda<Jump(void)>([&] () -> Jump {
return branchPtr(Equal, regT0, TrustedImmPtr(m_codeBlock->globalObject()));
}));
loadPtr(Address(regT0, JSObject::butterflyOffset()), regT0);
loadPtr(operandSlot, regT1);
negPtr(regT1);
storePtr(regT2, BaseIndex(regT0, regT1, TimesEight, (firstOutOfLineOffset - 2) * sizeof(EncodedJSValue)));
emitWriteBarrier(m_codeBlock->globalObject(), value, ShouldFilterValue);
break;
}
case GlobalVar:
case GlobalVarWithVarInjectionChecks:
case GlobalLexicalVar:
case GlobalLexicalVarWithVarInjectionChecks: {
JSScope* constantScope = JSScope::constantScopeForCodeBlock(resolveType, m_codeBlock);
RELEASE_ASSERT(constantScope);
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), regT0);
else
emitGetVarFromPointer(bitwise_cast<JSValue*>(*operandSlot), regT0);
addSlowCase(branchIfEmpty(regT0));
}
if (indirectLoadForOperand)
emitPutGlobalVariableIndirect(bitwise_cast<JSValue**>(operandSlot), value, &metadata.m_watchpointSet);
else
emitPutGlobalVariable(bitwise_cast<JSValue*>(*operandSlot), value, metadata.m_watchpointSet);
emitWriteBarrier(constantScope, value, ShouldFilterValue);
break;
}
case LocalClosureVar:
case ClosureVar:
case ClosureVarWithVarInjectionChecks:
emitVarInjectionCheck(needsVarInjectionChecks(resolveType));
emitPutClosureVar(scope, *operandSlot, value, metadata.m_watchpointSet);
emitWriteBarrier(scope, value, ShouldFilterValue);
break;
case ModuleVar:
case Dynamic:
addSlowCase(jump());
break;
case UnresolvedProperty:
case UnresolvedPropertyWithVarInjectionChecks:
RELEASE_ASSERT_NOT_REACHED();
break;
}
};
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;
emitGetVirtualRegister(arguments, regT0);
load64(Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>)), regT0);
emitValueProfilingSite(bytecode.metadata(m_codeBlock));
emitPutVirtualRegister(dst);
}
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();
emitGetVirtualRegister(arguments, regT0);
emitGetVirtualRegister(value, regT1);
store64(regT1, Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>)));
emitWriteBarrier(arguments, value, ShouldFilterValue);
}
void JIT::emitWriteBarrier(unsigned owner, unsigned value, WriteBarrierMode mode)
{
Jump valueNotCell;
if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) {
emitGetVirtualRegister(value, regT0);
valueNotCell = branchIfNotCell(regT0);
}
emitGetVirtualRegister(owner, regT0);
Jump ownerNotCell;
if (mode == ShouldFilterBaseAndValue || mode == ShouldFilterBase)
ownerNotCell = branchIfNotCell(regT0);
Jump ownerIsRememberedOrInEden = barrierBranch(*vm(), regT0, regT1);
callOperation(operationWriteBarrierSlowPath, regT0);
ownerIsRememberedOrInEden.link(this);
if (mode == ShouldFilterBaseAndValue || mode == ShouldFilterBase)
ownerNotCell.link(this);
if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue)
valueNotCell.link(this);
}
void JIT::emitWriteBarrier(JSCell* owner, unsigned value, WriteBarrierMode mode)
{
emitGetVirtualRegister(value, regT0);
Jump valueNotCell;
if (mode == ShouldFilterValue)
valueNotCell = branchIfNotCell(regT0);
emitWriteBarrier(owner);
if (mode == ShouldFilterValue)
valueNotCell.link(this);
}
#else // USE(JSVALUE64)
void JIT::emitWriteBarrier(unsigned owner, unsigned value, WriteBarrierMode mode)
{
Jump valueNotCell;
if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue) {
emitLoadTag(value, regT0);
valueNotCell = branchIfNotCell(regT0);
}
emitLoad(owner, regT0, regT1);
Jump ownerNotCell;
if (mode == ShouldFilterBase || mode == ShouldFilterBaseAndValue)
ownerNotCell = branchIfNotCell(regT0);
Jump ownerIsRememberedOrInEden = barrierBranch(*vm(), regT1, regT2);
callOperation(operationWriteBarrierSlowPath, regT1);
ownerIsRememberedOrInEden.link(this);
if (mode == ShouldFilterBase || mode == ShouldFilterBaseAndValue)
ownerNotCell.link(this);
if (mode == ShouldFilterValue || mode == ShouldFilterBaseAndValue)
valueNotCell.link(this);
}
void JIT::emitWriteBarrier(JSCell* owner, unsigned value, WriteBarrierMode mode)
{
Jump valueNotCell;
if (mode == ShouldFilterValue) {
emitLoadTag(value, regT0);
valueNotCell = branchIfNotCell(regT0);
}
emitWriteBarrier(owner);
if (mode == ShouldFilterValue)
valueNotCell.link(this);
}
#endif // USE(JSVALUE64)
void JIT::emitWriteBarrier(JSCell* owner)
{
Jump ownerIsRememberedOrInEden = barrierBranch(*vm(), owner, regT0);
callOperation(operationWriteBarrierSlowPath, owner);
ownerIsRememberedOrInEden.link(this);
}
void JIT::emitByValIdentifierCheck(ByValInfo* byValInfo, RegisterID cell, RegisterID scratch, const Identifier& propertyName, JumpList& slowCases)
{
if (propertyName.isSymbol())
slowCases.append(branchPtr(NotEqual, cell, TrustedImmPtr(byValInfo->cachedSymbol.get())));
else {
slowCases.append(branchIfNotString(cell));
loadPtr(Address(cell, JSString::offsetOfValue()), scratch);
slowCases.append(branchPtr(NotEqual, scratch, TrustedImmPtr(propertyName.impl())));
}
}
void JIT::privateCompileGetByVal(const ConcurrentJSLocker&, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode)
{
const Instruction* currentInstruction = m_codeBlock->instructions().at(byValInfo->bytecodeIndex).ptr();
PatchableJump badType;
JumpList slowCases;
switch (arrayMode) {
case JITInt32:
slowCases = emitInt32GetByVal(currentInstruction, badType);
break;
case JITDouble:
slowCases = emitDoubleGetByVal(currentInstruction, badType);
break;
case JITContiguous:
slowCases = emitContiguousGetByVal(currentInstruction, badType);
break;
case JITArrayStorage:
slowCases = emitArrayStorageGetByVal(currentInstruction, badType);
break;
case JITDirectArguments:
slowCases = emitDirectArgumentsGetByVal(currentInstruction, badType);
break;
case JITScopedArguments:
slowCases = emitScopedArgumentsGetByVal(currentInstruction, badType);
break;
default:
TypedArrayType type = typedArrayTypeForJITArrayMode(arrayMode);
if (isInt(type))
slowCases = emitIntTypedArrayGetByVal(currentInstruction, badType, type);
else
slowCases = emitFloatTypedArrayGetByVal(currentInstruction, badType, type);
break;
}
Jump done = jump();
LinkBuffer patchBuffer(*this, m_codeBlock);
patchBuffer.link(badType, byValInfo->slowPathTarget);
patchBuffer.link(slowCases, byValInfo->slowPathTarget);
patchBuffer.link(done, byValInfo->badTypeDoneTarget);
byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB(
m_codeBlock, patchBuffer, JITStubRoutinePtrTag,
"Baseline get_by_val stub for %s, return point %p", toCString(*m_codeBlock).data(), returnAddress.value());
MacroAssembler::repatchJump(byValInfo->badTypeJump, CodeLocationLabel<JITStubRoutinePtrTag>(byValInfo->stubRoutine->code().code()));
MacroAssembler::repatchCall(CodeLocationCall<NoPtrTag>(MacroAssemblerCodePtr<NoPtrTag>(returnAddress)), FunctionPtr<OperationPtrTag>(operationGetByValGeneric));
}
void JIT::privateCompileGetByValWithCachedId(ByValInfo* byValInfo, ReturnAddressPtr returnAddress, const Identifier& propertyName)
{
const Instruction* currentInstruction = m_codeBlock->instructions().at(byValInfo->bytecodeIndex).ptr();
auto bytecode = currentInstruction->as<OpGetByVal>();
Jump fastDoneCase;
Jump slowDoneCase;
JumpList slowCases;
JITGetByIdGenerator gen = emitGetByValWithCachedId(byValInfo, bytecode, propertyName, fastDoneCase, slowDoneCase, slowCases);
ConcurrentJSLocker locker(m_codeBlock->m_lock);
LinkBuffer patchBuffer(*this, m_codeBlock);
patchBuffer.link(slowCases, byValInfo->slowPathTarget);
patchBuffer.link(fastDoneCase, byValInfo->badTypeDoneTarget);
patchBuffer.link(slowDoneCase, byValInfo->badTypeNextHotPathTarget);
if (!m_exceptionChecks.empty())
patchBuffer.link(m_exceptionChecks, byValInfo->exceptionHandler);
for (const auto& callSite : m_calls) {
if (callSite.callee)
patchBuffer.link(callSite.from, callSite.callee);
}
gen.finalize(patchBuffer, patchBuffer);
byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB(
m_codeBlock, patchBuffer, JITStubRoutinePtrTag,
"Baseline get_by_val with cached property name '%s' stub for %s, return point %p", propertyName.impl()->utf8().data(), toCString(*m_codeBlock).data(), returnAddress.value());
byValInfo->stubInfo = gen.stubInfo();
MacroAssembler::repatchJump(byValInfo->notIndexJump, CodeLocationLabel<JITStubRoutinePtrTag>(byValInfo->stubRoutine->code().code()));
MacroAssembler::repatchCall(CodeLocationCall<NoPtrTag>(MacroAssemblerCodePtr<NoPtrTag>(returnAddress)), FunctionPtr<OperationPtrTag>(operationGetByValGeneric));
}
template<typename Op>
void JIT::privateCompilePutByVal(const ConcurrentJSLocker&, ByValInfo* byValInfo, ReturnAddressPtr returnAddress, JITArrayMode arrayMode)
{
const Instruction* currentInstruction = m_codeBlock->instructions().at(byValInfo->bytecodeIndex).ptr();
auto bytecode = currentInstruction->as<Op>();
PatchableJump badType;
JumpList slowCases;
bool needsLinkForWriteBarrier = false;
switch (arrayMode) {
case JITInt32:
slowCases = emitInt32PutByVal(bytecode, badType);
break;
case JITDouble:
slowCases = emitDoublePutByVal(bytecode, badType);
break;
case JITContiguous:
slowCases = emitContiguousPutByVal(bytecode, badType);
needsLinkForWriteBarrier = true;
break;
case JITArrayStorage:
slowCases = emitArrayStoragePutByVal(bytecode, badType);
needsLinkForWriteBarrier = true;
break;
default:
TypedArrayType type = typedArrayTypeForJITArrayMode(arrayMode);
if (isInt(type))
slowCases = emitIntTypedArrayPutByVal(bytecode, badType, type);
else
slowCases = emitFloatTypedArrayPutByVal(bytecode, badType, type);
break;
}
Jump done = jump();
LinkBuffer patchBuffer(*this, m_codeBlock);
patchBuffer.link(badType, byValInfo->slowPathTarget);
patchBuffer.link(slowCases, byValInfo->slowPathTarget);
patchBuffer.link(done, byValInfo->badTypeDoneTarget);
if (needsLinkForWriteBarrier) {
ASSERT(removeCodePtrTag(m_calls.last().callee.executableAddress()) == removeCodePtrTag(operationWriteBarrierSlowPath));
patchBuffer.link(m_calls.last().from, m_calls.last().callee);
}
bool isDirect = currentInstruction->opcodeID() == op_put_by_val_direct;
if (!isDirect) {
byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB(
m_codeBlock, patchBuffer, JITStubRoutinePtrTag,
"Baseline put_by_val stub for %s, return point %p", toCString(*m_codeBlock).data(), returnAddress.value());
} else {
byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB(
m_codeBlock, patchBuffer, JITStubRoutinePtrTag,
"Baseline put_by_val_direct stub for %s, return point %p", toCString(*m_codeBlock).data(), returnAddress.value());
}
MacroAssembler::repatchJump(byValInfo->badTypeJump, CodeLocationLabel<JITStubRoutinePtrTag>(byValInfo->stubRoutine->code().code()));
MacroAssembler::repatchCall(CodeLocationCall<NoPtrTag>(MacroAssemblerCodePtr<NoPtrTag>(returnAddress)), FunctionPtr<OperationPtrTag>(isDirect ? operationDirectPutByValGeneric : operationPutByValGeneric));
}
// This function is only consumed from another translation unit (JITOperations.cpp),
// so we list off the two expected specializations in advance.
template void JIT::privateCompilePutByVal<OpPutByVal>(const ConcurrentJSLocker&, ByValInfo*, ReturnAddressPtr, JITArrayMode);
template void JIT::privateCompilePutByVal<OpPutByValDirect>(const ConcurrentJSLocker&, ByValInfo*, ReturnAddressPtr, JITArrayMode);
template<typename Op>
void JIT::privateCompilePutByValWithCachedId(ByValInfo* byValInfo, ReturnAddressPtr returnAddress, PutKind putKind, const Identifier& propertyName)
{
ASSERT((putKind == Direct && Op::opcodeID == op_put_by_val_direct) || (putKind == NotDirect && Op::opcodeID == op_put_by_val));
const Instruction* currentInstruction = m_codeBlock->instructions().at(byValInfo->bytecodeIndex).ptr();
auto bytecode = currentInstruction->as<Op>();
JumpList doneCases;
JumpList slowCases;
JITPutByIdGenerator gen = emitPutByValWithCachedId(byValInfo, bytecode, putKind, propertyName, doneCases, slowCases);
ConcurrentJSLocker locker(m_codeBlock->m_lock);
LinkBuffer patchBuffer(*this, m_codeBlock);
patchBuffer.link(slowCases, byValInfo->slowPathTarget);
patchBuffer.link(doneCases, byValInfo->badTypeDoneTarget);
if (!m_exceptionChecks.empty())
patchBuffer.link(m_exceptionChecks, byValInfo->exceptionHandler);
for (const auto& callSite : m_calls) {
if (callSite.callee)
patchBuffer.link(callSite.from, callSite.callee);
}
gen.finalize(patchBuffer, patchBuffer);
byValInfo->stubRoutine = FINALIZE_CODE_FOR_STUB(
m_codeBlock, patchBuffer, JITStubRoutinePtrTag,
"Baseline put_by_val%s with cached property name '%s' stub for %s, return point %p", (putKind == Direct) ? "_direct" : "", propertyName.impl()->utf8().data(), toCString(*m_codeBlock).data(), returnAddress.value());
byValInfo->stubInfo = gen.stubInfo();
MacroAssembler::repatchJump(byValInfo->notIndexJump, CodeLocationLabel<JITStubRoutinePtrTag>(byValInfo->stubRoutine->code().code()));
MacroAssembler::repatchCall(CodeLocationCall<NoPtrTag>(MacroAssemblerCodePtr<NoPtrTag>(returnAddress)), FunctionPtr<OperationPtrTag>(putKind == Direct ? operationDirectPutByValGeneric : operationPutByValGeneric));
}
// This function is only consumed from another translation unit (JITOperations.cpp),
// so we list off the two expected specializations in advance.
template void JIT::privateCompilePutByValWithCachedId<OpPutByVal>(ByValInfo*, ReturnAddressPtr, PutKind, const Identifier&);
template void JIT::privateCompilePutByValWithCachedId<OpPutByValDirect>(ByValInfo*, ReturnAddressPtr, PutKind, const Identifier&);
JIT::JumpList JIT::emitDoubleLoad(const Instruction*, PatchableJump& badType)
{
#if USE(JSVALUE64)
RegisterID base = regT0;
RegisterID property = regT1;
RegisterID indexing = regT2;
RegisterID scratch = regT3;
#else
RegisterID base = regT0;
RegisterID property = regT2;
RegisterID indexing = regT1;
RegisterID scratch = regT3;
#endif
JumpList slowCases;
badType = patchableBranch32(NotEqual, indexing, TrustedImm32(DoubleShape));
loadPtr(Address(base, JSObject::butterflyOffset()), scratch);
slowCases.append(branch32(AboveOrEqual, property, Address(scratch, Butterfly::offsetOfPublicLength())));
loadDouble(BaseIndex(scratch, property, TimesEight), fpRegT0);
slowCases.append(branchIfNaN(fpRegT0));
return slowCases;
}
JIT::JumpList JIT::emitContiguousLoad(const Instruction*, PatchableJump& badType, IndexingType expectedShape)
{
#if USE(JSVALUE64)
RegisterID base = regT0;
RegisterID property = regT1;
RegisterID indexing = regT2;
JSValueRegs result = JSValueRegs(regT0);
RegisterID scratch = regT3;
#else
RegisterID base = regT0;
RegisterID property = regT2;
RegisterID indexing = regT1;
JSValueRegs result = JSValueRegs(regT1, regT0);
RegisterID scratch = regT3;
#endif
JumpList slowCases;
badType = patchableBranch32(NotEqual, indexing, TrustedImm32(expectedShape));
loadPtr(Address(base, JSObject::butterflyOffset()), scratch);
slowCases.append(branch32(AboveOrEqual, property, Address(scratch, Butterfly::offsetOfPublicLength())));
loadValue(BaseIndex(scratch, property, TimesEight), result);
slowCases.append(branchIfEmpty(result));
return slowCases;
}
JIT::JumpList JIT::emitArrayStorageLoad(const Instruction*, PatchableJump& badType)
{
#if USE(JSVALUE64)
RegisterID base = regT0;
RegisterID property = regT1;
RegisterID indexing = regT2;
JSValueRegs result = JSValueRegs(regT0);
RegisterID scratch = regT3;
#else
RegisterID base = regT0;
RegisterID property = regT2;
RegisterID indexing = regT1;
JSValueRegs result = JSValueRegs(regT1, regT0);
RegisterID scratch = regT3;
#endif
JumpList slowCases;
add32(TrustedImm32(-ArrayStorageShape), indexing, scratch);
badType = patchableBranch32(Above, scratch, TrustedImm32(SlowPutArrayStorageShape - ArrayStorageShape));
loadPtr(Address(base, JSObject::butterflyOffset()), scratch);
slowCases.append(branch32(AboveOrEqual, property, Address(scratch, ArrayStorage::vectorLengthOffset())));
loadValue(BaseIndex(scratch, property, TimesEight, ArrayStorage::vectorOffset()), result);
slowCases.append(branchIfEmpty(result));
return slowCases;
}
JIT::JumpList JIT::emitDirectArgumentsGetByVal(const Instruction*, PatchableJump& badType)
{
JumpList slowCases;
#if USE(JSVALUE64)
RegisterID base = regT0;
RegisterID property = regT1;
JSValueRegs result = JSValueRegs(regT0);
RegisterID scratch = regT3;
RegisterID scratch2 = regT4;
#else
RegisterID base = regT0;
RegisterID property = regT2;
JSValueRegs result = JSValueRegs(regT1, regT0);
RegisterID scratch = regT3;
RegisterID scratch2 = regT4;
#endif
load8(Address(base, JSCell::typeInfoTypeOffset()), scratch);
badType = patchableBranch32(NotEqual, scratch, TrustedImm32(DirectArgumentsType));
load32(Address(base, DirectArguments::offsetOfLength()), scratch2);
slowCases.append(branch32(AboveOrEqual, property, scratch2));
slowCases.append(branchTestPtr(NonZero, Address(base, DirectArguments::offsetOfMappedArguments())));
loadValue(BaseIndex(base, property, TimesEight, DirectArguments::storageOffset()), result);
return slowCases;
}
JIT::JumpList JIT::emitScopedArgumentsGetByVal(const Instruction*, PatchableJump& badType)
{
JumpList slowCases;
#if USE(JSVALUE64)
RegisterID base = regT0;
RegisterID property = regT1;
JSValueRegs result = JSValueRegs(regT0);
RegisterID scratch = regT3;
RegisterID scratch2 = regT4;
RegisterID scratch3 = regT5;
#else
RegisterID base = regT0;
RegisterID property = regT2;
JSValueRegs result = JSValueRegs(regT1, regT0);
RegisterID scratch = regT3;
RegisterID scratch2 = regT4;
RegisterID scratch3 = regT5;
#endif
load8(Address(base, JSCell::typeInfoTypeOffset()), scratch);
badType = patchableBranch32(NotEqual, scratch, TrustedImm32(ScopedArgumentsType));
loadPtr(Address(base, ScopedArguments::offsetOfStorage()), scratch3);
slowCases.append(branch32(AboveOrEqual, property, Address(scratch3, ScopedArguments::offsetOfTotalLengthInStorage())));
loadPtr(Address(base, ScopedArguments::offsetOfTable()), scratch);
load32(Address(scratch, ScopedArgumentsTable::offsetOfLength()), scratch2);
Jump overflowCase = branch32(AboveOrEqual, property, scratch2);
loadPtr(Address(base, ScopedArguments::offsetOfScope()), scratch2);
loadPtr(Address(scratch, ScopedArgumentsTable::offsetOfArguments()), scratch);
load32(BaseIndex(scratch, property, TimesFour), scratch);
slowCases.append(branch32(Equal, scratch, TrustedImm32(ScopeOffset::invalidOffset)));
loadValue(BaseIndex(scratch2, scratch, TimesEight, JSLexicalEnvironment::offsetOfVariables()), result);
Jump done = jump();
overflowCase.link(this);
sub32(property, scratch2);
neg32(scratch2);
loadValue(BaseIndex(scratch3, scratch2, TimesEight), result);
slowCases.append(branchIfEmpty(result));
done.link(this);
load32(Address(scratch3, ScopedArguments::offsetOfTotalLengthInStorage()), scratch);
emitPreparePreciseIndexMask32(property, scratch, scratch2);
andPtr(scratch2, result.payloadGPR());
return slowCases;
}
JIT::JumpList JIT::emitIntTypedArrayGetByVal(const Instruction*, PatchableJump& badType, TypedArrayType type)
{
ASSERT(isInt(type));
// The best way to test the array type is to use the classInfo. We need to do so without
// clobbering the register that holds the indexing type, base, and property.
#if USE(JSVALUE64)
RegisterID base = regT0;
RegisterID property = regT1;
JSValueRegs result = JSValueRegs(regT0);
RegisterID scratch = regT3;
RegisterID scratch2 = regT4;
#else
RegisterID base = regT0;
RegisterID property = regT2;
JSValueRegs result = JSValueRegs(regT1, regT0);
RegisterID scratch = regT3;
RegisterID scratch2 = regT4;
#endif
RegisterID resultPayload = result.payloadGPR();
JumpList slowCases;
load8(Address(base, JSCell::typeInfoTypeOffset()), scratch);
badType = patchableBranch32(NotEqual, scratch, TrustedImm32(typeForTypedArrayType(type)));
load32(Address(base, JSArrayBufferView::offsetOfLength()), scratch2);
slowCases.append(branch32(AboveOrEqual, property, scratch2));
loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), scratch);
cageConditionally(Gigacage::Primitive, scratch, scratch2, scratch2);
switch (elementSize(type)) {
case 1:
if (JSC::isSigned(type))
load8SignedExtendTo32(BaseIndex(scratch, property, TimesOne), resultPayload);
else
load8(BaseIndex(scratch, property, TimesOne), resultPayload);
break;
case 2:
if (JSC::isSigned(type))
load16SignedExtendTo32(BaseIndex(scratch, property, TimesTwo), resultPayload);
else
load16(BaseIndex(scratch, property, TimesTwo), resultPayload);
break;
case 4:
load32(BaseIndex(scratch, property, TimesFour), resultPayload);
break;
default:
CRASH();
}
Jump done;
if (type == TypeUint32) {
Jump canBeInt = branch32(GreaterThanOrEqual, resultPayload, TrustedImm32(0));
convertInt32ToDouble(resultPayload, fpRegT0);
addDouble(AbsoluteAddress(&twoToThe32), fpRegT0);
boxDouble(fpRegT0, result);
done = jump();
canBeInt.link(this);
}
boxInt32(resultPayload, result);
if (done.isSet())
done.link(this);
return slowCases;
}
JIT::JumpList JIT::emitFloatTypedArrayGetByVal(const Instruction*, PatchableJump& badType, TypedArrayType type)
{
ASSERT(isFloat(type));
#if USE(JSVALUE64)
RegisterID base = regT0;
RegisterID property = regT1;
JSValueRegs result = JSValueRegs(regT0);
RegisterID scratch = regT3;
RegisterID scratch2 = regT4;
#else
RegisterID base = regT0;
RegisterID property = regT2;
JSValueRegs result = JSValueRegs(regT1, regT0);
RegisterID scratch = regT3;
RegisterID scratch2 = regT4;
#endif
JumpList slowCases;
load8(Address(base, JSCell::typeInfoTypeOffset()), scratch);
badType = patchableBranch32(NotEqual, scratch, TrustedImm32(typeForTypedArrayType(type)));
load32(Address(base, JSArrayBufferView::offsetOfLength()), scratch2);
slowCases.append(branch32(AboveOrEqual, property, scratch2));
loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), scratch);
cageConditionally(Gigacage::Primitive, scratch, scratch2, scratch2);
switch (elementSize(type)) {
case 4:
loadFloat(BaseIndex(scratch, property, TimesFour), fpRegT0);
convertFloatToDouble(fpRegT0, fpRegT0);
break;
case 8: {
loadDouble(BaseIndex(scratch, property, TimesEight), fpRegT0);
break;
}
default:
CRASH();
}
purifyNaN(fpRegT0);
boxDouble(fpRegT0, result);
return slowCases;
}
template<typename Op>
JIT::JumpList JIT::emitIntTypedArrayPutByVal(Op bytecode, PatchableJump& badType, TypedArrayType type)
{
auto& metadata = bytecode.metadata(m_codeBlock);
ArrayProfile* profile = &metadata.m_arrayProfile;
ASSERT(isInt(type));
int value = bytecode.m_value.offset();
#if USE(JSVALUE64)
RegisterID base = regT0;
RegisterID property = regT1;
RegisterID earlyScratch = regT3;
RegisterID lateScratch = regT2;
RegisterID lateScratch2 = regT4;
#else
RegisterID base = regT0;
RegisterID property = regT2;
RegisterID earlyScratch = regT3;
RegisterID lateScratch = regT1;
RegisterID lateScratch2 = regT4;
#endif
JumpList slowCases;
load8(Address(base, JSCell::typeInfoTypeOffset()), earlyScratch);
badType = patchableBranch32(NotEqual, earlyScratch, TrustedImm32(typeForTypedArrayType(type)));
load32(Address(base, JSArrayBufferView::offsetOfLength()), lateScratch2);
Jump inBounds = branch32(Below, property, lateScratch2);
emitArrayProfileOutOfBoundsSpecialCase(profile);
slowCases.append(jump());
inBounds.link(this);
#if USE(JSVALUE64)
emitGetVirtualRegister(value, earlyScratch);
slowCases.append(branchIfNotInt32(earlyScratch));
#else
emitLoad(value, lateScratch, earlyScratch);
slowCases.append(branchIfNotInt32(lateScratch));
#endif
// We would be loading this into base as in get_by_val, except that the slow
// path expects the base to be unclobbered.
loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), lateScratch);
cageConditionally(Gigacage::Primitive, lateScratch, lateScratch2, lateScratch2);
if (isClamped(type)) {
ASSERT(elementSize(type) == 1);
ASSERT(!JSC::isSigned(type));
Jump inBounds = branch32(BelowOrEqual, earlyScratch, TrustedImm32(0xff));
Jump tooBig = branch32(GreaterThan, earlyScratch, TrustedImm32(0xff));
xor32(earlyScratch, earlyScratch);
Jump clamped = jump();
tooBig.link(this);
move(TrustedImm32(0xff), earlyScratch);
clamped.link(this);
inBounds.link(this);
}
switch (elementSize(type)) {
case 1:
store8(earlyScratch, BaseIndex(lateScratch, property, TimesOne));
break;
case 2:
store16(earlyScratch, BaseIndex(lateScratch, property, TimesTwo));
break;
case 4:
store32(earlyScratch, BaseIndex(lateScratch, property, TimesFour));
break;
default:
CRASH();
}
return slowCases;
}
template<typename Op>
JIT::JumpList JIT::emitFloatTypedArrayPutByVal(Op bytecode, PatchableJump& badType, TypedArrayType type)
{
auto& metadata = bytecode.metadata(m_codeBlock);
ArrayProfile* profile = &metadata.m_arrayProfile;
ASSERT(isFloat(type));
int value = bytecode.m_value.offset();
#if USE(JSVALUE64)
RegisterID base = regT0;
RegisterID property = regT1;
RegisterID earlyScratch = regT3;
RegisterID lateScratch = regT2;
RegisterID lateScratch2 = regT4;
#else
RegisterID base = regT0;
RegisterID property = regT2;
RegisterID earlyScratch = regT3;
RegisterID lateScratch = regT1;
RegisterID lateScratch2 = regT4;
#endif
JumpList slowCases;
load8(Address(base, JSCell::typeInfoTypeOffset()), earlyScratch);
badType = patchableBranch32(NotEqual, earlyScratch, TrustedImm32(typeForTypedArrayType(type)));
load32(Address(base, JSArrayBufferView::offsetOfLength()), lateScratch2);
Jump inBounds = branch32(Below, property, lateScratch2);
emitArrayProfileOutOfBoundsSpecialCase(profile);
slowCases.append(jump());
inBounds.link(this);
#if USE(JSVALUE64)
emitGetVirtualRegister(value, earlyScratch);
Jump doubleCase = branchIfNotInt32(earlyScratch);
convertInt32ToDouble(earlyScratch, fpRegT0);
Jump ready = jump();
doubleCase.link(this);
slowCases.append(branchIfNotNumber(earlyScratch));
add64(tagTypeNumberRegister, earlyScratch);
move64ToDouble(earlyScratch, fpRegT0);
ready.link(this);
#else
emitLoad(value, lateScratch, earlyScratch);
Jump doubleCase = branchIfNotInt32(lateScratch);
convertInt32ToDouble(earlyScratch, fpRegT0);
Jump ready = jump();
doubleCase.link(this);
slowCases.append(branch32(Above, lateScratch, TrustedImm32(JSValue::LowestTag)));
moveIntsToDouble(earlyScratch, lateScratch, fpRegT0, fpRegT1);
ready.link(this);
#endif
// We would be loading this into base as in get_by_val, except that the slow
// path expects the base to be unclobbered.
loadPtr(Address(base, JSArrayBufferView::offsetOfVector()), lateScratch);
cageConditionally(Gigacage::Primitive, lateScratch, lateScratch2, lateScratch2);
switch (elementSize(type)) {
case 4:
convertDoubleToFloat(fpRegT0, fpRegT0);
storeFloat(fpRegT0, BaseIndex(lateScratch, property, TimesFour));
break;
case 8:
storeDouble(fpRegT0, BaseIndex(lateScratch, property, TimesEight));
break;
default:
CRASH();
}
return slowCases;
}
template void JIT::emit_op_put_by_val<OpPutByVal>(const Instruction*);
} // namespace JSC
#endif // ENABLE(JIT)
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