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haikuwebkit/Source/JavaScriptCore/jit/JITCall32_64.cpp

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/*
* Copyright (C) 2020 Igalia, S.L. All rights reserved.
* Copyright (C) 2020 Metrological Group B.V.
* Copyright (C) 2008-2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#if ENABLE(JIT)
#if USE(JSVALUE32_64)
#include "JIT.h"
#include "CacheableIdentifierInlines.h"
#include "CodeBlock.h"
#include "Interpreter.h"
#include "JITInlines.h"
#include "JSArray.h"
#include "JSFunction.h"
#include "JSCInlines.h"
#include "LinkBuffer.h"
#include "OpcodeInlines.h"
#include "ResultType.h"
#include "SetupVarargsFrame.h"
#include "SlowPathCall.h"
#include "StackAlignment.h"
#include "ThunkGenerators.h"
#include <wtf/StringPrintStream.h>
namespace JSC {
template<typename Op>
void JIT::emitPutCallResult(const Op& bytecode)
{
emitValueProfilingSite(bytecode.metadata(m_codeBlock), JSValueRegs(regT1, regT0));
emitStore(destinationFor(bytecode, m_bytecodeIndex.checkpoint()).virtualRegister(), regT1, regT0);
}
void JIT::emit_op_ret(const Instruction* currentInstruction)
{
auto bytecode = currentInstruction->as<OpRet>();
VirtualRegister value = bytecode.m_value;
emitLoad(value, regT1, regT0);
checkStackPointerAlignment();
emitRestoreCalleeSaves();
emitFunctionEpilogue();
ret();
}
void JIT::emitSlow_op_call(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpCall>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_tail_call(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpTailCall>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_call_eval(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpCallEval>(currentInstruction, iter, m_callLinkInfoIndex);
}
void JIT::emitSlow_op_call_varargs(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpCallVarargs>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_tail_call_varargs(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpTailCallVarargs>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_tail_call_forward_arguments(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpTailCallForwardArguments>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_construct_varargs(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpConstructVarargs>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emitSlow_op_construct(const Instruction* currentInstruction, Vector<SlowCaseEntry>::iterator& iter)
{
compileOpCallSlowCase<OpConstruct>(currentInstruction, iter, m_callLinkInfoIndex++);
}
void JIT::emit_op_call(const Instruction* currentInstruction)
{
compileOpCall<OpCall>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_tail_call(const Instruction* currentInstruction)
{
compileOpCall<OpTailCall>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_call_eval(const Instruction* currentInstruction)
{
compileOpCall<OpCallEval>(currentInstruction, m_callLinkInfoIndex);
}
void JIT::emit_op_call_varargs(const Instruction* currentInstruction)
{
compileOpCall<OpCallVarargs>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_tail_call_varargs(const Instruction* currentInstruction)
{
compileOpCall<OpTailCallVarargs>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_tail_call_forward_arguments(const Instruction* currentInstruction)
{
compileOpCall<OpTailCallForwardArguments>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_construct_varargs(const Instruction* currentInstruction)
{
compileOpCall<OpConstructVarargs>(currentInstruction, m_callLinkInfoIndex++);
}
void JIT::emit_op_construct(const Instruction* currentInstruction)
{
compileOpCall<OpConstruct>(currentInstruction, m_callLinkInfoIndex++);
}
template <typename Op>
std::enable_if_t<
Op::opcodeID != op_call_varargs && Op::opcodeID != op_construct_varargs
&& Op::opcodeID != op_tail_call_varargs && Op::opcodeID != op_tail_call_forward_arguments
, void>
JIT::compileSetupFrame(const Op& bytecode, CallLinkInfo*)
{
unsigned checkpoint = m_bytecodeIndex.checkpoint();
auto& metadata = bytecode.metadata(m_codeBlock);
int argCount = argumentCountIncludingThisFor(bytecode, checkpoint);
int registerOffset = -static_cast<int>(stackOffsetInRegistersForCall(bytecode, checkpoint));
if (Op::opcodeID == op_call && shouldEmitProfiling()) {
emitLoad(VirtualRegister(registerOffset + CallFrame::argumentOffsetIncludingThis(0)), regT0, regT1);
Jump done = branchIfNotCell(regT0);
load32(Address(regT1, JSCell::structureIDOffset()), regT1);
store32(regT1, metadata.m_callLinkInfo.m_arrayProfile.addressOfLastSeenStructureID());
done.link(this);
}
addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
store32(TrustedImm32(argCount), Address(stackPointerRegister, CallFrameSlot::argumentCountIncludingThis * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)));
}
template<typename Op>
std::enable_if_t<
Op::opcodeID == op_call_varargs || Op::opcodeID == op_construct_varargs
|| Op::opcodeID == op_tail_call_varargs || Op::opcodeID == op_tail_call_forward_arguments
, void>
JIT::compileSetupFrame(const Op& bytecode, CallLinkInfo* info)
{
OpcodeID opcodeID = Op::opcodeID;
VirtualRegister thisValue = bytecode.m_thisValue;
VirtualRegister arguments = bytecode.m_arguments;
int firstFreeRegister = bytecode.m_firstFree.offset();
int firstVarArgOffset = bytecode.m_firstVarArg;
emitLoad(arguments, regT1, regT0);
Z_JITOperation_GJZZ sizeOperation;
if (Op::opcodeID == op_tail_call_forward_arguments)
sizeOperation = operationSizeFrameForForwardArguments;
else
sizeOperation = operationSizeFrameForVarargs;
callOperation(sizeOperation, m_codeBlock->globalObject(), JSValueRegs(regT1, regT0), -firstFreeRegister, firstVarArgOffset);
move(TrustedImm32(-firstFreeRegister), regT1);
emitSetVarargsFrame(*this, returnValueGPR, false, regT1, regT1);
addPtr(TrustedImm32(-(sizeof(CallerFrameAndPC) + WTF::roundUpToMultipleOf(stackAlignmentBytes(), 6 * sizeof(void*)))), regT1, stackPointerRegister);
emitLoad(arguments, regT2, regT4);
F_JITOperation_GFJZZ setupOperation;
if (opcodeID == op_tail_call_forward_arguments)
setupOperation = operationSetupForwardArgumentsFrame;
else
setupOperation = operationSetupVarargsFrame;
callOperation(setupOperation, m_codeBlock->globalObject(), regT1, JSValueRegs(regT2, regT4), firstVarArgOffset, regT0);
move(returnValueGPR, regT1);
// Profile the argument count.
load32(Address(regT1, CallFrameSlot::argumentCountIncludingThis * static_cast<int>(sizeof(Register)) + PayloadOffset), regT2);
load32(info->addressOfMaxArgumentCountIncludingThis(), regT0);
Jump notBiggest = branch32(Above, regT0, regT2);
store32(regT2, info->addressOfMaxArgumentCountIncludingThis());
notBiggest.link(this);
// Initialize 'this'.
emitLoad(thisValue, regT2, regT0);
store32(regT0, Address(regT1, PayloadOffset + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
store32(regT2, Address(regT1, TagOffset + (CallFrame::thisArgumentOffset() * static_cast<int>(sizeof(Register)))));
addPtr(TrustedImm32(sizeof(CallerFrameAndPC)), regT1, stackPointerRegister);
}
template<typename Op>
bool JIT::compileCallEval(const Op&)
{
return false;
}
template<>
bool JIT::compileCallEval(const OpCallEval& bytecode)
{
addPtr(TrustedImm32(-static_cast<ptrdiff_t>(sizeof(CallerFrameAndPC))), stackPointerRegister, regT1);
storePtr(callFrameRegister, Address(regT1, CallFrame::callerFrameOffset()));
addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
move(TrustedImm32(bytecode.m_ecmaMode.value()), regT2);
callOperation(operationCallEval, m_codeBlock->globalObject(), regT1, regT2);
addSlowCase(branchIfEmpty(regT1));
emitPutCallResult(bytecode);
return true;
}
void JIT::compileCallEvalSlowCase(const Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
auto bytecode = instruction->as<OpCallEval>();
CallLinkInfo* info = m_codeBlock->addCallLinkInfo(CodeOrigin(m_bytecodeIndex));
info->setUpCall(CallLinkInfo::Call, regT0);
int registerOffset = -bytecode.m_argv;
VirtualRegister callee = bytecode.m_callee;
addPtr(TrustedImm32(registerOffset * sizeof(Register) + sizeof(CallerFrameAndPC)), callFrameRegister, stackPointerRegister);
emitLoad(callee, regT1, regT0);
emitVirtualCall(*m_vm, m_codeBlock->globalObject(), info);
addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
checkStackPointerAlignment();
emitPutCallResult(bytecode);
}
template <typename Op>
void JIT::compileOpCall(const Instruction* instruction, unsigned callLinkInfoIndex)
{
OpcodeID opcodeID = Op::opcodeID;
auto bytecode = instruction->as<Op>();
VirtualRegister callee = calleeFor(bytecode, m_bytecodeIndex.checkpoint());
/* Caller always:
- Updates callFrameRegister to callee callFrame.
- Initializes ArgumentCount; CallerFrame; Callee.
For a JS call:
- Callee initializes ReturnPC; CodeBlock.
- Callee restores callFrameRegister before return.
For a non-JS call:
- Caller initializes ReturnPC; CodeBlock.
- Caller restores callFrameRegister after return.
*/
CallLinkInfo* info = nullptr;
if (opcodeID != op_call_eval)
info = m_codeBlock->addCallLinkInfo(CodeOrigin(m_bytecodeIndex));
compileSetupFrame(bytecode, info);
// SP holds newCallFrame + sizeof(CallerFrameAndPC), with ArgumentCount initialized.
auto bytecodeIndex = m_codeBlock->bytecodeIndex(instruction);
uint32_t locationBits = CallSiteIndex(bytecodeIndex).bits();
store32(TrustedImm32(locationBits), tagFor(CallFrameSlot::argumentCountIncludingThis));
emitLoad(callee, regT1, regT0); // regT1, regT0 holds callee.
store32(regT0, Address(stackPointerRegister, CallFrameSlot::callee * static_cast<int>(sizeof(Register)) + PayloadOffset - sizeof(CallerFrameAndPC)));
store32(regT1, Address(stackPointerRegister, CallFrameSlot::callee * static_cast<int>(sizeof(Register)) + TagOffset - sizeof(CallerFrameAndPC)));
if (compileCallEval(bytecode))
return;
info->setUpCall(CallLinkInfo::callTypeFor(opcodeID), regT0);
ASSERT(m_callCompilationInfo.size() == callLinkInfoIndex);
m_callCompilationInfo.append(CallCompilationInfo());
m_callCompilationInfo[callLinkInfoIndex].callLinkInfo = info;
addSlowCase(branchIfNotCell(regT1));
checkStackPointerAlignment();
if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs || opcodeID == op_tail_call_forward_arguments) {
auto slowPaths = info->emitTailCallFastPath(*this, regT0, regT2, CallLinkInfo::UseDataIC::Yes, [&] {
emitRestoreCalleeSaves();
prepareForTailCallSlow(regT2);
});
addSlowCase(slowPaths);
auto doneLocation = label();
m_callCompilationInfo[callLinkInfoIndex].doneLocation = doneLocation;
return;
}
auto slowPaths = info->emitFastPath(*this, regT0, regT2, CallLinkInfo::UseDataIC::Yes);
addSlowCase(slowPaths);
m_callCompilationInfo[callLinkInfoIndex].doneLocation = label();
addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
checkStackPointerAlignment();
emitPutCallResult(bytecode);
}
template <typename Op>
void JIT::compileOpCallSlowCase(const Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter, unsigned callLinkInfoIndex)
{
OpcodeID opcodeID = Op::opcodeID;
if (opcodeID == op_call_eval) {
compileCallEvalSlowCase(instruction, iter);
return;
}
linkAllSlowCases(iter);
m_callCompilationInfo[callLinkInfoIndex].slowPathStart = label();
if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs || opcodeID == op_tail_call_forward_arguments)
emitRestoreCalleeSaves();
move(TrustedImmPtr(m_codeBlock->globalObject()), regT3);
m_callCompilationInfo[callLinkInfoIndex].callLinkInfo->emitSlowPath(*m_vm, *this);
if (opcodeID == op_tail_call || opcodeID == op_tail_call_varargs || opcodeID == op_tail_call_forward_arguments) {
abortWithReason(JITDidReturnFromTailCall);
return;
}
addPtr(TrustedImm32(stackPointerOffsetFor(m_codeBlock) * sizeof(Register)), callFrameRegister, stackPointerRegister);
checkStackPointerAlignment();
auto bytecode = instruction->as<Op>();
emitPutCallResult(bytecode);
}
void JIT::emit_op_iterator_open(const Instruction* instruction)
{
auto bytecode = instruction->as<OpIteratorOpen>();
auto* tryFastFunction = ([&] () {
switch (instruction->width()) {
case Narrow: return iterator_open_try_fast_narrow;
case Wide16: return iterator_open_try_fast_wide16;
case Wide32: return iterator_open_try_fast_wide32;
default: RELEASE_ASSERT_NOT_REACHED();
}
})();
JITSlowPathCall slowPathCall(this, instruction, tryFastFunction);
slowPathCall.call();
Jump fastCase = branch32(NotEqual, GPRInfo::returnValueGPR2, TrustedImm32(static_cast<uint32_t>(IterationMode::Generic)));
compileOpCall<OpIteratorOpen>(instruction, m_callLinkInfoIndex++);
advanceToNextCheckpoint();
// call result (iterator) is in regT1 (tag)/regT0 (payload)
const Identifier* ident = &vm().propertyNames->next;
emitJumpSlowCaseIfNotJSCell(regT1);
GPRReg tagIteratorGPR = regT1;
GPRReg payloadIteratorGPR = regT0;
GPRReg tagNextGPR = tagIteratorGPR;
GPRReg payloadNextGPR = payloadIteratorGPR;
JSValueRegs nextRegs = JSValueRegs(tagNextGPR, payloadNextGPR);
JITGetByIdGenerator gen(
m_codeBlock,
JITType::BaselineJIT,
CodeOrigin(m_bytecodeIndex),
CallSiteIndex(BytecodeIndex(m_bytecodeIndex.offset())),
RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromImmortalIdentifier(ident->impl()),
JSValueRegs(tagIteratorGPR, payloadIteratorGPR),
nextRegs,
InvalidGPRReg,
AccessType::GetById);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(bytecode.metadata(m_codeBlock), nextRegs);
emitPutVirtualRegister(bytecode.m_next, nextRegs);
fastCase.link(this);
}
void JIT::emitSlow_op_iterator_open(const Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
compileOpCallSlowCase<OpIteratorOpen>(instruction, iter, m_callLinkInfoIndex++);
emitJumpSlowToHotForCheckpoint(jump());
linkAllSlowCases(iter);
GPRReg tagIteratorGPR = regT1;
GPRReg payloadIteratorGPR = regT0;
JumpList notObject;
notObject.append(branchIfNotCell(tagIteratorGPR));
notObject.append(branchIfNotObject(payloadIteratorGPR));
auto bytecode = instruction->as<OpIteratorOpen>();
VirtualRegister nextVReg = bytecode.m_next;
UniquedStringImpl* ident = vm().propertyNames->next.impl();
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
Label coldPathBegin = label();
Call call = callOperationWithProfile(
bytecode.metadata(m_codeBlock), // metadata
operationGetByIdOptimize, // operation
nextVReg, // result
TrustedImmPtr(m_codeBlock->globalObject()), // arg1
gen.stubInfo(), // arg2
JSValueRegs(tagIteratorGPR, payloadIteratorGPR), // arg3
CacheableIdentifier::createFromImmortalIdentifier(ident).rawBits()); // arg4
gen.reportSlowPathCall(coldPathBegin, call);
auto done = jump();
notObject.link(this);
callOperation(operationThrowIteratorResultIsNotObject, TrustedImmPtr(m_codeBlock->globalObject()));
done.link(this);
}
void JIT::emit_op_iterator_next(const Instruction* instruction)
{
auto bytecode = instruction->as<OpIteratorNext>();
auto& metadata = bytecode.metadata(m_codeBlock);
auto* tryFastFunction = ([&] () {
switch (instruction->width()) {
case Narrow: return iterator_next_try_fast_narrow;
case Wide16: return iterator_next_try_fast_wide16;
case Wide32: return iterator_next_try_fast_wide32;
default: RELEASE_ASSERT_NOT_REACHED();
}
})();
JSValueRegs nextRegs(regT1, regT0);
emitGetVirtualRegister(bytecode.m_next, nextRegs);
Jump genericCase = branchIfNotEmpty(nextRegs);
JITSlowPathCall slowPathCall(this, instruction, tryFastFunction);
slowPathCall.call();
Jump fastCase = branch32(NotEqual, GPRInfo::returnValueGPR2, TrustedImm32(static_cast<uint32_t>(IterationMode::Generic)));
genericCase.link(this);
or8(TrustedImm32(static_cast<uint8_t>(IterationMode::Generic)), AbsoluteAddress(&metadata.m_iterationMetadata.seenModes));
compileOpCall<OpIteratorNext>(instruction, m_callLinkInfoIndex++);
advanceToNextCheckpoint();
// call result ({ done, value } JSObject) in regT1, regT0
GPRReg tagValueGPR = regT1;
GPRReg payloadValueGPR = regT0;
GPRReg tagDoneGPR = regT5;
GPRReg payloadDoneGPR = regT4;
{
JSValueRegs doneRegs = JSValueRegs(tagDoneGPR, payloadDoneGPR);
GPRReg tagIterResultGPR = regT3;
GPRReg payloadIterResultGPR = regT2;
// iterResultGPR will get trashed by the first get by id below.
move(regT1, tagIterResultGPR);
move(regT0, payloadIterResultGPR);
emitJumpSlowCaseIfNotJSCell(tagIterResultGPR);
RegisterSet preservedRegs = RegisterSet::stubUnavailableRegisters();
preservedRegs.add(tagValueGPR);
preservedRegs.add(payloadValueGPR);
JITGetByIdGenerator gen(
m_codeBlock,
JITType::BaselineJIT,
CodeOrigin(m_bytecodeIndex),
CallSiteIndex(BytecodeIndex(m_bytecodeIndex.offset())),
preservedRegs,
CacheableIdentifier::createFromImmortalIdentifier(vm().propertyNames->done.impl()),
JSValueRegs(tagIterResultGPR, payloadIterResultGPR),
doneRegs,
InvalidGPRReg,
AccessType::GetById);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(metadata, doneRegs);
emitPutVirtualRegister(bytecode.m_done, doneRegs);
advanceToNextCheckpoint();
}
{
JSValueRegs resultRegs = JSValueRegs(tagValueGPR, payloadValueGPR);
GPRReg tagIterResultGPR = regT1;
GPRReg payloadIterResultGPR = regT0;
GPRReg scratch1 = regT6;
GPRReg scratch2 = regT7;
const bool shouldCheckMasqueradesAsUndefined = false;
JumpList iterationDone = branchIfTruthy(vm(), JSValueRegs(tagDoneGPR, payloadDoneGPR), scratch1, scratch2, fpRegT0, fpRegT1, shouldCheckMasqueradesAsUndefined, m_codeBlock->globalObject());
JITGetByIdGenerator gen(
m_codeBlock,
JITType::BaselineJIT,
CodeOrigin(m_bytecodeIndex),
CallSiteIndex(BytecodeIndex(m_bytecodeIndex.offset())),
RegisterSet::stubUnavailableRegisters(),
CacheableIdentifier::createFromImmortalIdentifier(vm().propertyNames->value.impl()),
JSValueRegs(tagIterResultGPR, payloadIterResultGPR),
resultRegs,
InvalidGPRReg,
AccessType::GetById);
gen.generateFastPath(*this);
addSlowCase(gen.slowPathJump());
m_getByIds.append(gen);
emitValueProfilingSite(metadata, resultRegs);
emitPutVirtualRegister(bytecode.m_value, resultRegs);
iterationDone.link(this);
}
fastCase.link(this);
}
void JIT::emitSlow_op_iterator_next(const Instruction* instruction, Vector<SlowCaseEntry>::iterator& iter)
{
linkAllSlowCases(iter);
compileOpCallSlowCase<OpIteratorNext>(instruction, iter, m_callLinkInfoIndex++);
emitJumpSlowToHotForCheckpoint(jump());
auto bytecode = instruction->as<OpIteratorNext>();
{
VirtualRegister doneVReg = bytecode.m_done;
GPRReg tagValueGPR = regT1;
GPRReg payloadValueGPR = regT0;
GPRReg tagIterResultGPR = regT3;
GPRReg payloadIterResultGPR = regT2;
GPRReg tagDoneGPR = regT5;
GPRReg payloadDoneGPR = regT4;
linkAllSlowCases(iter);
JumpList notObject;
notObject.append(branchIfNotCell(tagIterResultGPR));
notObject.append(branchIfNotObject(payloadIterResultGPR));
UniquedStringImpl* ident = vm().propertyNames->done.impl();
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
Label coldPathBegin = label();
Call call = callOperationWithProfile(
bytecode.metadata(m_codeBlock), // metadata
operationGetByIdOptimize, // operation
doneVReg, // result
TrustedImmPtr(m_codeBlock->globalObject()), // arg1
gen.stubInfo(), // arg2
JSValueRegs(tagIterResultGPR, payloadIterResultGPR), // arg3
CacheableIdentifier::createFromImmortalIdentifier(ident).rawBits()); // arg4
gen.reportSlowPathCall(coldPathBegin, call);
emitGetVirtualRegister(doneVReg, JSValueRegs(tagDoneGPR, payloadDoneGPR));
emitGetVirtualRegister(bytecode.m_value, JSValueRegs(tagValueGPR, payloadValueGPR));
emitJumpSlowToHotForCheckpoint(jump());
notObject.link(this);
callOperation(operationThrowIteratorResultIsNotObject, TrustedImmPtr(m_codeBlock->globalObject()));
}
{
GPRReg tagIterResultGPR = regT1;
GPRReg payloadIterResultGPR = regT0;
linkAllSlowCases(iter);
VirtualRegister valueVReg = bytecode.m_value;
UniquedStringImpl* ident = vm().propertyNames->value.impl();
JITGetByIdGenerator& gen = m_getByIds[m_getByIdIndex++];
Label coldPathBegin = label();
Call call = callOperationWithProfile(
bytecode.metadata(m_codeBlock), // metadata
operationGetByIdOptimize, // operation
valueVReg, // result
TrustedImmPtr(m_codeBlock->globalObject()), // arg1
gen.stubInfo(), // arg2
JSValueRegs(tagIterResultGPR, payloadIterResultGPR), // arg3
CacheableIdentifier::createFromImmortalIdentifier(ident).rawBits()); // arg4
gen.reportSlowPathCall(coldPathBegin, call);
}
}
} // namespace JSC
#endif // USE(JSVALUE32_64)
#endif // ENABLE(JIT)
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