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darling-JavaScriptCore/jit/JITPropertyAccess.cpp

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/*
* Copyright (C) 2008-2021 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 "CacheableIdentifierInlines.h"
#include "CodeBlock.h"
#include "DirectArguments.h"
#include "JITInlines.h"
#include "JSLexicalEnvironment.h"
#include "LinkBuffer.h"
#include "PrivateFieldPutKind.h"
#include "SlowPathCall.h"
#include "StructureStubInfo.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);
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
ArrayProfile* profile = &metadata.m_arrayProfile;
emitGetVirtualRegister(base, regT0);
emitGetVirtualRegister(property, regT1);
if (metadata.m_seenIdentifiers.count() > Options::getByValICMaxNumberOfIdentifiers()) {
auto notCell = branchIfNotCell(regT0);
emitArrayProfilingSiteWithCell(regT0, regT2, profile);
notCell.link(this);
callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByVal, dst, TrustedImmPtr(m_codeBlock->globalObject()), regT0, regT1);
} else {
emitJumpSlowCaseIfNotJSCell(regT0, base);
emitArrayProfilingSiteWithCell(regT0, regT2, profile);
JSValueRegs resultRegs = JSValueRegs(regT0);
JITGetByValGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), AccessType::GetByVal, RegisterSet::stubUnavailableRegisters(),
JSValueRegs(regT0), JSValueRegs(regT1), resultRegs);
if (isOperandConstantInt(property))
gen.stubInfo()->propertyIsInt32 = true;
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByVals.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitPutVirtualRegister(dst);
}
}
void JIT::emitSlow_op_get_by_val(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
if (hasAnySlowCases(iter)) {
auto bytecode = currentInstruction->as<OpGetByVal>();
VirtualRegister dst = bytecode.m_dst;
auto& metadata = bytecode.metadata(m_codeBlock);
ArrayProfile* profile = &metadata.m_arrayProfile;
linkAllSlowCases(iter);
JITGetByValGenerator& gen = m_getByVals[m_getByValIndex];
++m_getByValIndex;
Label coldPathBegin = label();
Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetByValOptimize, dst, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), profile, regT0, regT1);
gen.reportSlowPathCall(coldPathBegin, call);
}
}
void JIT::emit_op_get_private_name(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetPrivateName>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
GPRReg baseGPR = regT0;
GPRReg propertyGPR = regT1;
emitGetVirtualRegister(base, baseGPR);
emitGetVirtualRegister(property, propertyGPR);
emitJumpSlowCaseIfNotJSCell(regT0, base);
JSValueRegs resultRegs = JSValueRegs(regT0);
JITGetByValGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), AccessType::GetPrivateName,
RegisterSet::stubUnavailableRegisters(), JSValueRegs(baseGPR), JSValueRegs(propertyGPR), resultRegs);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByVals.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitPutVirtualRegister(dst);
}
void JIT::emitSlow_op_get_private_name(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
ASSERT(hasAnySlowCases(iter));
auto bytecode = currentInstruction->as<OpGetPrivateName>();
VirtualRegister dst = bytecode.m_dst;
GPRReg baseGPR = regT0;
GPRReg propertyGPR = regT1;
linkAllSlowCases(iter);
JITGetByValGenerator& gen = m_getByVals[m_getByValIndex];
++m_getByValIndex;
Label coldPathBegin = label();
Call call = callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetPrivateNameOptimize, dst, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), baseGPR, propertyGPR);
gen.reportSlowPathCall(coldPathBegin, call);
}
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);
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
ArrayProfile* profile = &metadata.m_arrayProfile;
ByValInfo* byValInfo = m_codeBlock->addByValInfo(m_bytecodeIndex);
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.
zeroExtend32ToWord(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_bytecodeIndex, 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);
VirtualRegister value = bytecode.m_value;
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(numberTagRegister, 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, 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);
VirtualRegister value = bytecode.m_value;
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, 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(Op bytecode, PutKind putKind, CacheableIdentifier propertyName, JumpList& doneCases, JumpList& slowCases)
{
// base: regT0
// property: regT1
// scratch: regT2
VirtualRegister base = bytecode.m_base;
VirtualRegister value = bytecode.m_value;
slowCases.append(branchIfNotCell(regT1));
emitByValIdentifierCheck(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_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), propertyName,
JSValueRegs(regT0), JSValueRegs(regT1), regT2, ecmaMode(bytecode), putKind);
gen.generateFastPath(*this);
// IC can write new Structure without write-barrier if a base is cell.
// FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size.
// https://bugs.webkit.org/show_bug.cgi?id=209395
emitWriteBarrier(base, ShouldFilterBase);
doneCases.append(jump());
Label coldPathBegin = label();
gen.slowPathJump().link(this);
Call call = callOperation(gen.slowPathFunction(), TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT1, regT0, propertyName.rawBits());
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;
VirtualRegister base;
VirtualRegister property;
VirtualRegister value;
ECMAMode ecmaMode = ECMAMode::strict();
auto load = [&](auto bytecode) {
base = bytecode.m_base;
property = bytecode.m_property;
value = bytecode.m_value;
ecmaMode = bytecode.m_ecmaMode;
};
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, TrustedImmPtr(m_codeBlock->globalObject()), regT0, regT1, regT2, byValInfo, TrustedImm32(ecmaMode.value()));
m_byValCompilationInfo[m_byValInstructionIndex].slowPathTarget = slowPath;
m_byValCompilationInfo[m_byValInstructionIndex].returnAddress = call;
m_byValInstructionIndex++;
}
void JIT::emit_op_put_private_name(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutPrivateName>();
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
ByValInfo* byValInfo = m_codeBlock->addByValInfo(m_bytecodeIndex);
emitGetVirtualRegister(base, regT0);
emitGetVirtualRegister(property, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, base);
PatchableJump fastPathJmp = patchableJump();
addSlowCase(fastPathJmp);
Label done = label();
m_byValCompilationInfo.append(ByValCompilationInfo(byValInfo, m_bytecodeIndex, fastPathJmp, done, done));
}
void JIT::emitSlow_op_put_private_name(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
auto bytecode = currentInstruction->as<OpPutPrivateName>();
ByValInfo* byValInfo = m_byValCompilationInfo[m_byValInstructionIndex].byValInfo;
PrivateFieldPutKind putKind = bytecode.m_putKind;
linkAllSlowCases(iter);
Label slowPath = label();
GPRReg baseGPR = regT0;
GPRReg propertyGPR = regT1;
GPRReg valueGPR = regT2;
emitGetVirtualRegister(bytecode.m_base, baseGPR);
emitGetVirtualRegister(bytecode.m_property, propertyGPR);
emitGetVirtualRegister(bytecode.m_value, valueGPR);
Call call = callOperation(operationPutPrivateNameOptimize, TrustedImmPtr(m_codeBlock->globalObject()), baseGPR, propertyGPR, valueGPR, byValInfo, TrustedImm32(putKind.value()));
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, regT0);
int32_t options = bytecode.m_attributes;
emitGetVirtualRegister(bytecode.m_accessor, regT1);
callOperation(operationPutGetterById, TrustedImmPtr(m_codeBlock->globalObject()), 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, regT0);
int32_t options = bytecode.m_attributes;
emitGetVirtualRegister(bytecode.m_accessor, regT1);
callOperation(operationPutSetterById, TrustedImmPtr(m_codeBlock->globalObject()), 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, regT0);
int32_t attribute = bytecode.m_attributes;
emitGetVirtualRegister(bytecode.m_getter, regT1);
emitGetVirtualRegister(bytecode.m_setter, regT2);
callOperation(operationPutGetterSetter, TrustedImmPtr(m_codeBlock->globalObject()), 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, regT0);
emitGetVirtualRegister(bytecode.m_property, regT1);
int32_t attributes = bytecode.m_attributes;
emitGetVirtualRegister(bytecode.m_accessor, regT2);
callOperation(operationPutGetterByVal, TrustedImmPtr(m_codeBlock->globalObject()), regT0, regT1, attributes, regT2);
}
void JIT::emit_op_put_setter_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutSetterByVal>();
emitGetVirtualRegister(bytecode.m_base, regT0);
emitGetVirtualRegister(bytecode.m_property, regT1);
int32_t attributes = bytecode.m_attributes;
emitGetVirtualRegister(bytecode.m_accessor, regT2);
callOperation(operationPutSetterByVal, TrustedImmPtr(m_codeBlock->globalObject()), regT0, regT1, attributes, regT2);
}
void JIT::emit_op_del_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpDelById>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitGetVirtualRegister(base, regT1);
emitJumpSlowCaseIfNotJSCell(regT1, base);
JITDelByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident),
JSValueRegs(regT1), JSValueRegs(regT0), regT2);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_delByIds.append(gen);
boxBoolean(regT0, JSValueRegs(regT0));
emitPutVirtualRegister(dst, JSValueRegs(regT0));
// IC can write new Structure without write-barrier if a base is cell.
// We should emit write-barrier at the end of sequence since write-barrier clobbers registers.
// FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size.
// https://bugs.webkit.org/show_bug.cgi?id=209395
emitWriteBarrier(base, ShouldFilterBase);
}
void JIT::emitSlow_op_del_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpDelById>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITDelByIdGenerator& gen = m_delByIds[m_delByIdIndex++];
Label coldPathBegin = label();
emitGetVirtualRegister(base, regT0);
Call call = callOperation(operationDeleteByIdOptimize, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits(), TrustedImm32(bytecode.m_ecmaMode.value()));
gen.reportSlowPathCall(coldPathBegin, call);
boxBoolean(regT0, JSValueRegs(regT0));
emitPutVirtualRegister(dst, JSValueRegs(regT0));
}
void JIT::emit_op_del_by_val(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpDelByVal>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
emitGetVirtualRegister(base, regT1);
emitJumpSlowCaseIfNotJSCell(regT1, base);
emitGetVirtualRegister(property, regT0);
emitJumpSlowCaseIfNotJSCell(regT0, property);
JITDelByValGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
JSValueRegs(regT1), JSValueRegs(regT0), JSValueRegs(regT0), regT2);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_delByVals.append(gen);
boxBoolean(regT0, JSValueRegs(regT0));
emitPutVirtualRegister(dst, JSValueRegs(regT0));
// We should emit write-barrier at the end of sequence since write-barrier clobbers registers.
// IC can write new Structure without write-barrier if a base is cell.
// FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size.
// https://bugs.webkit.org/show_bug.cgi?id=209395
emitWriteBarrier(base, ShouldFilterBase);
}
void JIT::emitSlow_op_del_by_val(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpDelByVal>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
VirtualRegister property = bytecode.m_property;
JITDelByValGenerator& gen = m_delByVals[m_delByValIndex++];
Label coldPathBegin = label();
emitGetVirtualRegister(base, regT0);
emitGetVirtualRegister(property, regT1);
Call call = callOperation(operationDeleteByValOptimize, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, regT1, TrustedImm32(bytecode.m_ecmaMode.value()));
gen.reportSlowPathCall(coldPathBegin, call);
boxBoolean(regT0, JSValueRegs(regT0));
emitPutVirtualRegister(dst, JSValueRegs(regT0));
}
void JIT::emit_op_try_get_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpTryGetById>();
VirtualRegister resultVReg = bytecode.m_dst;
VirtualRegister baseVReg = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitGetVirtualRegister(baseVReg, regT0);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
JSValueRegs resultRegs = JSValueRegs(regT0);
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs(regT0), resultRegs, AccessType::TryGetById);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitPutVirtualRegister(resultVReg);
}
void JIT::emitSlow_op_try_get_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpTryGetById>();
VirtualRegister resultVReg = bytecode.m_dst;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
Label coldPathBegin = label();
Call call = callOperation(operationTryGetByIdOptimize, resultVReg, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_get_by_id_direct(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByIdDirect>();
VirtualRegister resultVReg = bytecode.m_dst;
VirtualRegister baseVReg = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitGetVirtualRegister(baseVReg, regT0);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
JSValueRegs resultRegs = JSValueRegs(regT0);
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs(regT0), resultRegs, AccessType::GetByIdDirect);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitPutVirtualRegister(resultVReg);
}
void JIT::emitSlow_op_get_by_id_direct(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpGetByIdDirect>();
VirtualRegister resultVReg = bytecode.m_dst;
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, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
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);
VirtualRegister resultVReg = bytecode.m_dst;
VirtualRegister baseVReg = bytecode.m_base;
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);
}
JSValueRegs resultRegs = JSValueRegs(regT0);
JITGetByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), JSValueRegs(regT0), resultRegs, AccessType::GetById);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitPutVirtualRegister(resultVReg);
}
void JIT::emit_op_get_by_id_with_this(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetByIdWithThis>();
VirtualRegister resultVReg = bytecode.m_dst;
VirtualRegister baseVReg = bytecode.m_base;
VirtualRegister thisVReg = bytecode.m_thisValue;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitGetVirtualRegister(baseVReg, regT0);
emitGetVirtualRegister(thisVReg, regT1);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
emitJumpSlowCaseIfNotJSCell(regT1, thisVReg);
JSValueRegs resultRegs = JSValueRegs(regT0);
JITGetByIdWithThisGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), resultRegs, JSValueRegs(regT0), JSValueRegs(regT1));
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIdsWithThis.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), resultRegs);
emitPutVirtualRegister(resultVReg);
}
void JIT::emitSlow_op_get_by_id(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpGetById>();
VirtualRegister resultVReg = bytecode.m_dst;
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, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
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>();
VirtualRegister resultVReg = bytecode.m_dst;
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, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, regT1, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_put_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutById>();
VirtualRegister baseVReg = bytecode.m_base;
VirtualRegister valueVReg = bytecode.m_value;
bool direct = bytecode.m_flags.isDirect();
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
// 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_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident),
JSValueRegs(regT0), JSValueRegs(regT1), regT2, ecmaMode(bytecode),
direct ? PutKind::Direct : PutKind::NotDirect);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_putByIds.append(gen);
// IC can write new Structure without write-barrier if a base is cell.
// FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size.
// https://bugs.webkit.org/show_bug.cgi?id=209395
emitWriteBarrier(baseVReg, ShouldFilterBase);
}
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(), TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT1, regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
gen.reportSlowPathCall(coldPathBegin, call);
}
void JIT::emit_op_in_by_id(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpInById>();
VirtualRegister resultVReg = bytecode.m_dst;
VirtualRegister baseVReg = bytecode.m_base;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
emitGetVirtualRegister(baseVReg, regT0);
emitJumpSlowCaseIfNotJSCell(regT0, baseVReg);
JITInByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident), 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>();
VirtualRegister resultVReg = bytecode.m_dst;
const Identifier* ident = &(m_codeBlock->identifier(bytecode.m_property));
JITInByIdGenerator& gen = m_inByIds[m_inByIdIndex++];
Label coldPathBegin = label();
Call call = callOperation(operationInByIdOptimize, resultVReg, TrustedImmPtr(m_codeBlock->globalObject()), gen.stubInfo(), regT0, CacheableIdentifier::createFromIdentifierOwnedByCodeBlock(m_codeBlock, *ident).rawBits());
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(VirtualRegister dst, VirtualRegister 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);
VirtualRegister dst = bytecode.m_dst;
VirtualRegister scope = bytecode.m_scope;
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(VirtualRegister 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(VirtualRegister 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);
VirtualRegister dst = bytecode.m_dst;
VirtualRegister scope = bytecode.m_scope;
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_ENABLED) {
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, regT0);
}
void JIT::emitSlow_op_get_from_scope(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = currentInstruction->as<OpGetFromScope>();
VirtualRegister dst = bytecode.m_dst;
callOperationWithProfile(bytecode.metadata(m_codeBlock), operationGetFromScope, dst, TrustedImmPtr(m_codeBlock->globalObject()), currentInstruction);
}
void JIT::emitPutGlobalVariable(JSValue* operand, VirtualRegister value, WatchpointSet* set)
{
emitGetVirtualRegister(value, regT0);
emitNotifyWrite(set);
storePtr(regT0, operand);
}
void JIT::emitPutGlobalVariableIndirect(JSValue** addressOfOperand, VirtualRegister value, WatchpointSet** indirectWatchpointSet)
{
emitGetVirtualRegister(value, regT0);
loadPtr(indirectWatchpointSet, regT1);
emitNotifyWrite(regT1);
loadPtr(addressOfOperand, regT1);
storePtr(regT0, regT1);
}
void JIT::emitPutClosureVar(VirtualRegister scope, uintptr_t operand, VirtualRegister 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);
VirtualRegister scope = bytecode.m_scope;
VirtualRegister value = bytecode.m_value;
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, TrustedImmPtr(m_codeBlock->globalObject()), currentInstruction);
}
void JIT::emit_op_get_from_arguments(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetFromArguments>();
VirtualRegister dst = bytecode.m_dst;
VirtualRegister arguments = bytecode.m_arguments;
int index = bytecode.m_index;
emitGetVirtualRegister(arguments, regT0);
load64(Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>)), regT0);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), regT0);
emitPutVirtualRegister(dst);
}
void JIT::emit_op_put_to_arguments(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutToArguments>();
VirtualRegister arguments = bytecode.m_arguments;
int index = bytecode.m_index;
VirtualRegister value = bytecode.m_value;
emitGetVirtualRegister(arguments, regT0);
emitGetVirtualRegister(value, regT1);
store64(regT1, Address(regT0, DirectArguments::storageOffset() + index * sizeof(WriteBarrier<Unknown>)));
emitWriteBarrier(arguments, value, ShouldFilterValue);
}
void JIT::emitWriteBarrier(VirtualRegister owner, VirtualRegister value, WriteBarrierMode mode)
{
// value may be invalid VirtualRegister if mode is UnconditionalWriteBarrier or ShouldFilterBase.
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, &vm(), 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, VirtualRegister value, WriteBarrierMode mode)
{
emitGetVirtualRegister(value, regT0);
Jump valueNotCell;
if (mode == ShouldFilterValue)
valueNotCell = branchIfNotCell(regT0);
emitWriteBarrier(owner);
if (mode == ShouldFilterValue)
valueNotCell.link(this);
}
void JIT::emit_op_get_internal_field(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpGetInternalField>();
auto& metadata = bytecode.metadata(m_codeBlock);
VirtualRegister dst = bytecode.m_dst;
VirtualRegister base = bytecode.m_base;
unsigned index = bytecode.m_index;
emitGetVirtualRegister(base, regT1);
loadPtr(Address(regT1, JSInternalFieldObjectImpl<>::offsetOfInternalField(index)), regT0);
emitValueProfilingSite(metadata, regT0);
emitPutVirtualRegister(dst);
}
void JIT::emit_op_put_internal_field(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpPutInternalField>();
VirtualRegister base = bytecode.m_base;
VirtualRegister value = bytecode.m_value;
unsigned index = bytecode.m_index;
emitGetVirtualRegister(base, regT0);
emitGetVirtualRegister(value, regT1);
storePtr(regT1, Address(regT0, JSInternalFieldObjectImpl<>::offsetOfInternalField(index)));
emitWriteBarrier(base, value, ShouldFilterValue);
}
template void JIT::emit_op_put_by_val<OpPutByVal>(const Instruction*);
#else // USE(JSVALUE64)
void JIT::emitWriteBarrier(VirtualRegister owner, VirtualRegister value, WriteBarrierMode mode)
{
// value may be invalid VirtualRegister if mode is UnconditionalWriteBarrier or ShouldFilterBase.
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, &vm(), 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, VirtualRegister value, WriteBarrierMode mode)
{
Jump valueNotCell;
if (mode == ShouldFilterValue) {
emitLoadTag(value, regT0);
valueNotCell = branchIfNotCell(regT0);
}
emitWriteBarrier(owner);
if (mode == ShouldFilterValue)
valueNotCell.link(this);
}
template <typename Op>
JITPutByIdGenerator JIT::emitPutByValWithCachedId(Op bytecode, PutKind putKind, CacheableIdentifier propertyName, JumpList& doneCases, JumpList& slowCases)
{
// base: tag(regT1), payload(regT0)
// property: tag(regT3), payload(regT2)
VirtualRegister base = bytecode.m_base;
VirtualRegister value = bytecode.m_value;
slowCases.append(branchIfNotCell(regT3));
emitByValIdentifierCheck(regT2, regT2, propertyName, slowCases);
// Write barrier breaks the registers. So after issuing the write barrier,
// reload the registers.
//
// IC can write new Structure without write-barrier if a base is cell.
// We are emitting write-barrier before writing here but this is OK since 32bit JSC does not have concurrent GC.
// FIXME: Use UnconditionalWriteBarrier in Baseline effectively to reduce code size.
// https://bugs.webkit.org/show_bug.cgi?id=209395
emitWriteBarrier(base, ShouldFilterBase);
emitLoadPayload(base, regT0);
emitLoad(value, regT3, regT2);
JITPutByIdGenerator gen(
m_codeBlock, CodeOrigin(m_bytecodeIndex), CallSiteIndex(m_bytecodeIndex), RegisterSet::stubUnavailableRegisters(), propertyName,
JSValueRegs::payloadOnly(regT0), JSValueRegs(regT3, regT2), regT1, ecmaMode(bytecode), 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(), m_codeBlock->globalObject(), gen.stubInfo(), JSValueRegs(regT3, regT2), JSValueRegs(regT1, regT0), propertyName.rawBits());
gen.reportSlowPathCall(coldPathBegin, call);
doneCases.append(jump());
return gen;
}
#endif // USE(JSVALUE64)
JITPutByIdGenerator JIT::emitPutPrivateNameWithCachedId(OpPutPrivateName bytecode, CacheableIdentifier propertyName, JumpList& doneCases, JumpList& slowCases)
{
auto putKind = bytecode.m_putKind.isDefine() ? PutKind::DirectPrivateFieldDefine : PutKind::DirectPrivateFieldSet;
return emitPutByValWithCachedId(bytecode, putKind, propertyName, doneCases, slowCases);
}
void JIT::emitWriteBarrier(VirtualRegister owner, WriteBarrierMode mode)
{
ASSERT(mode == UnconditionalWriteBarrier || mode == ShouldFilterBase);
emitWriteBarrier(owner, VirtualRegister(), mode);
}
void JIT::emitWriteBarrier(JSCell* owner)
{
Jump ownerIsRememberedOrInEden = barrierBranch(vm(), owner, regT0);
callOperation(operationWriteBarrierSlowPath, &vm(), owner);
ownerIsRememberedOrInEden.link(this);
}
void JIT::emitByValIdentifierCheck(RegisterID cell, RegisterID scratch, CacheableIdentifier propertyName, JumpList& slowCases)
{
if (propertyName.isSymbolCell())
slowCases.append(branchPtr(NotEqual, cell, TrustedImmPtr(propertyName.cell())));
else {
slowCases.append(branchIfNotString(cell));
loadPtr(Address(cell, JSString::offsetOfValue()), scratch);
slowCases.append(branchPtr(NotEqual, scratch, TrustedImmPtr(propertyName.uid())));
}
}
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->doneTarget);
if (needsLinkForWriteBarrier) {
ASSERT(removeCodePtrTag(m_farCalls.last().callee.executableAddress()) == removeCodePtrTag(operationWriteBarrierSlowPath));
patchBuffer.link(m_farCalls.last().from, m_farCalls.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.untaggedValue());
} 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.untaggedValue());
}
MacroAssembler::repatchJump(byValInfo->badTypeJump, CodeLocationLabel<JITStubRoutinePtrTag>(byValInfo->stubRoutine->code().code()));
MacroAssembler::repatchCall(CodeLocationCall<ReturnAddressPtrTag>(MacroAssemblerCodePtr<ReturnAddressPtrTag>(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);
void JIT::privateCompilePutPrivateNameWithCachedId(ByValInfo* byValInfo, ReturnAddressPtr returnAddress, CacheableIdentifier propertyName)
{
const Instruction* currentInstruction = m_codeBlock->instructions().at(byValInfo->bytecodeIndex).ptr();
auto bytecode = currentInstruction->as<OpPutPrivateName>();
JumpList doneCases;
JumpList slowCases;
JITPutByIdGenerator gen = emitPutPrivateNameWithCachedId(bytecode, propertyName, doneCases, slowCases);
ConcurrentJSLocker locker(m_codeBlock->m_lock);
LinkBuffer patchBuffer(*this, m_codeBlock);
patchBuffer.link(slowCases, byValInfo->slowPathTarget);
patchBuffer.link(doneCases, byValInfo->doneTarget);
if (!m_exceptionChecks.empty())
patchBuffer.link(m_exceptionChecks, byValInfo->exceptionHandler);
for (const auto& callSite : m_nearCalls) {
if (callSite.callee)
patchBuffer.link(callSite.from, callSite.callee);
}
for (const auto& callSite : m_farCalls) {
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_private_name with cached property name '%s' stub for %s, return point %p", propertyName.uid()->utf8().data(), toCString(*m_codeBlock).data(), returnAddress.untaggedValue());
byValInfo->stubInfo = gen.stubInfo();
MacroAssembler::repatchJump(byValInfo->notIndexJump, CodeLocationLabel<JITStubRoutinePtrTag>(byValInfo->stubRoutine->code().code()));
MacroAssembler::repatchCall(CodeLocationCall<ReturnAddressPtrTag>(MacroAssemblerCodePtr<ReturnAddressPtrTag>(returnAddress)), FunctionPtr<OperationPtrTag>(operationPutPrivateNameGeneric));
}
template<typename Op>
void JIT::privateCompilePutByValWithCachedId(ByValInfo* byValInfo, ReturnAddressPtr returnAddress, PutKind putKind, CacheableIdentifier propertyName)
{
ASSERT((putKind == PutKind::Direct && Op::opcodeID == op_put_by_val_direct) || (putKind == 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(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->doneTarget);
if (!m_exceptionChecks.empty())
patchBuffer.link(m_exceptionChecks, byValInfo->exceptionHandler);
for (const auto& callSite : m_nearCalls) {
if (callSite.callee)
patchBuffer.link(callSite.from, callSite.callee);
}
for (const auto& callSite : m_farCalls) {
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 == PutKind::Direct) ? "_direct" : "", propertyName.uid()->utf8().data(), toCString(*m_codeBlock).data(), returnAddress.untaggedValue());
byValInfo->stubInfo = gen.stubInfo();
MacroAssembler::repatchJump(byValInfo->notIndexJump, CodeLocationLabel<JITStubRoutinePtrTag>(byValInfo->stubRoutine->code().code()));
MacroAssembler::repatchCall(CodeLocationCall<ReturnAddressPtrTag>(MacroAssemblerCodePtr<ReturnAddressPtrTag>(returnAddress)), FunctionPtr<OperationPtrTag>(putKind == 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, CacheableIdentifier);
template void JIT::privateCompilePutByValWithCachedId<OpPutByValDirect>(ByValInfo*, ReturnAddressPtr, PutKind, CacheableIdentifier);
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;
}
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));
VirtualRegister value = bytecode.m_value;
#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));
VirtualRegister value = bytecode.m_value;
#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(numberTagRegister, 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;
}
} // namespace JSC
#endif // ENABLE(JIT)
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