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fuchsia / third_party / webkit / d1fc7014f43fe774e5e25b17c77b5b139d3dcb0b / . / Source / JavaScriptCore / dfg / DFGSpeculativeJIT64.cpp
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/*
* Copyright (C) 2011-2016 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"
#include "DFGSpeculativeJIT.h"
#if ENABLE(DFG_JIT)
#include "ArrayPrototype.h"
#include "CallFrameShuffler.h"
#include "DFGAbstractInterpreterInlines.h"
#include "DFGCallArrayAllocatorSlowPathGenerator.h"
#include "DFGOperations.h"
#include "DFGSlowPathGenerator.h"
#include "DirectArguments.h"
#include "GetterSetter.h"
#include "HasOwnPropertyCache.h"
#include "JSCInlines.h"
#include "JSEnvironmentRecord.h"
#include "JSLexicalEnvironment.h"
#include "JSMap.h"
#include "JSPropertyNameEnumerator.h"
#include "JSSet.h"
#include "ObjectPrototype.h"
#include "SetupVarargsFrame.h"
#include "SpillRegistersMode.h"
#include "StringPrototype.h"
#include "TypeProfilerLog.h"
#include "Watchdog.h"
namespace JSC { namespace DFG {
#if USE(JSVALUE64)
void SpeculativeJIT::boxInt52(GPRReg sourceGPR, GPRReg targetGPR, DataFormat format)
{
GPRReg tempGPR;
if (sourceGPR == targetGPR)
tempGPR = allocate();
else
tempGPR = targetGPR;
FPRReg fpr = fprAllocate();
if (format == DataFormatInt52)
m_jit.rshift64(TrustedImm32(JSValue::int52ShiftAmount), sourceGPR);
else
ASSERT(format == DataFormatStrictInt52);
m_jit.boxInt52(sourceGPR, targetGPR, tempGPR, fpr);
if (format == DataFormatInt52 && sourceGPR != targetGPR)
m_jit.lshift64(TrustedImm32(JSValue::int52ShiftAmount), sourceGPR);
if (tempGPR != targetGPR)
unlock(tempGPR);
unlock(fpr);
}
GPRReg SpeculativeJIT::fillJSValue(Edge edge)
{
VirtualRegister virtualRegister = edge->virtualRegister();
GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
switch (info.registerFormat()) {
case DataFormatNone: {
GPRReg gpr = allocate();
if (edge->hasConstant()) {
JSValue jsValue = edge->asJSValue();
m_jit.move(MacroAssembler::TrustedImm64(JSValue::encode(jsValue)), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJS);
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
} else {
DataFormat spillFormat = info.spillFormat();
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
switch (spillFormat) {
case DataFormatInt32: {
m_jit.load32(JITCompiler::addressFor(virtualRegister), gpr);
m_jit.or64(GPRInfo::tagTypeNumberRegister, gpr);
spillFormat = DataFormatJSInt32;
break;
}
default:
m_jit.load64(JITCompiler::addressFor(virtualRegister), gpr);
DFG_ASSERT(m_jit.graph(), m_currentNode, spillFormat & DataFormatJS);
break;
}
info.fillJSValue(*m_stream, gpr, spillFormat);
}
return gpr;
}
case DataFormatInt32: {
GPRReg gpr = info.gpr();
// If the register has already been locked we need to take a copy.
// If not, we'll zero extend in place, so mark on the info that this is now type DataFormatInt32, not DataFormatJSInt32.
if (m_gprs.isLocked(gpr)) {
GPRReg result = allocate();
m_jit.or64(GPRInfo::tagTypeNumberRegister, gpr, result);
return result;
}
m_gprs.lock(gpr);
m_jit.or64(GPRInfo::tagTypeNumberRegister, gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJSInt32);
return gpr;
}
case DataFormatCell:
// No retag required on JSVALUE64!
case DataFormatJS:
case DataFormatJSInt32:
case DataFormatJSDouble:
case DataFormatJSCell:
case DataFormatJSBoolean: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
return gpr;
}
case DataFormatBoolean:
case DataFormatStorage:
case DataFormatDouble:
case DataFormatInt52:
// this type currently never occurs
DFG_CRASH(m_jit.graph(), m_currentNode, "Bad data format");
default:
DFG_CRASH(m_jit.graph(), m_currentNode, "Corrupt data format");
return InvalidGPRReg;
}
}
void SpeculativeJIT::cachedGetById(CodeOrigin origin, JSValueRegs base, JSValueRegs result, unsigned identifierNumber, JITCompiler::Jump slowPathTarget , SpillRegistersMode mode, AccessType type)
{
cachedGetById(origin, base.gpr(), result.gpr(), identifierNumber, slowPathTarget, mode, type);
}
void SpeculativeJIT::cachedGetById(CodeOrigin codeOrigin, GPRReg baseGPR, GPRReg resultGPR, unsigned identifierNumber, JITCompiler::Jump slowPathTarget, SpillRegistersMode spillMode, AccessType type)
{
CallSiteIndex callSite = m_jit.recordCallSiteAndGenerateExceptionHandlingOSRExitIfNeeded(codeOrigin, m_stream->size());
RegisterSet usedRegisters = this->usedRegisters();
if (spillMode == DontSpill) {
// We've already flushed registers to the stack, we don't need to spill these.
usedRegisters.set(baseGPR, false);
usedRegisters.set(resultGPR, false);
}
JITGetByIdGenerator gen(
m_jit.codeBlock(), codeOrigin, callSite, usedRegisters, identifierUID(identifierNumber),
JSValueRegs(baseGPR), JSValueRegs(resultGPR), type);
gen.generateFastPath(m_jit);
JITCompiler::JumpList slowCases;
if (slowPathTarget.isSet())
slowCases.append(slowPathTarget);
slowCases.append(gen.slowPathJump());
auto slowPath = slowPathCall(
slowCases, this, type == AccessType::Get ? operationGetByIdOptimize : operationTryGetByIdOptimize,
spillMode, ExceptionCheckRequirement::CheckNeeded,
resultGPR, gen.stubInfo(), baseGPR, identifierUID(identifierNumber));
m_jit.addGetById(gen, slowPath.get());
addSlowPathGenerator(WTFMove(slowPath));
}
void SpeculativeJIT::cachedPutById(CodeOrigin codeOrigin, GPRReg baseGPR, GPRReg valueGPR, GPRReg scratchGPR, unsigned identifierNumber, PutKind putKind, JITCompiler::Jump slowPathTarget, SpillRegistersMode spillMode)
{
CallSiteIndex callSite = m_jit.recordCallSiteAndGenerateExceptionHandlingOSRExitIfNeeded(codeOrigin, m_stream->size());
RegisterSet usedRegisters = this->usedRegisters();
if (spillMode == DontSpill) {
// We've already flushed registers to the stack, we don't need to spill these.
usedRegisters.set(baseGPR, false);
usedRegisters.set(valueGPR, false);
}
JITPutByIdGenerator gen(
m_jit.codeBlock(), codeOrigin, callSite, usedRegisters, JSValueRegs(baseGPR),
JSValueRegs(valueGPR), scratchGPR, m_jit.ecmaModeFor(codeOrigin), putKind);
gen.generateFastPath(m_jit);
JITCompiler::JumpList slowCases;
if (slowPathTarget.isSet())
slowCases.append(slowPathTarget);
slowCases.append(gen.slowPathJump());
auto slowPath = slowPathCall(
slowCases, this, gen.slowPathFunction(), NoResult, gen.stubInfo(), valueGPR, baseGPR,
identifierUID(identifierNumber));
m_jit.addPutById(gen, slowPath.get());
addSlowPathGenerator(WTFMove(slowPath));
}
void SpeculativeJIT::nonSpeculativeNonPeepholeCompareNullOrUndefined(Edge operand)
{
ASSERT_WITH_MESSAGE(!masqueradesAsUndefinedWatchpointIsStillValid() || !isKnownCell(operand.node()), "The Compare should have been eliminated, it is known to be always false.");
JSValueOperand arg(this, operand, ManualOperandSpeculation);
GPRReg argGPR = arg.gpr();
GPRTemporary result(this);
GPRReg resultGPR = result.gpr();
m_jit.move(TrustedImm32(0), resultGPR);
JITCompiler::JumpList done;
if (masqueradesAsUndefinedWatchpointIsStillValid()) {
if (!isKnownNotCell(operand.node()))
done.append(m_jit.branchIfCell(JSValueRegs(argGPR)));
} else {
GPRTemporary localGlobalObject(this);
GPRTemporary remoteGlobalObject(this);
GPRTemporary scratch(this);
JITCompiler::Jump notCell;
if (!isKnownCell(operand.node()))
notCell = m_jit.branchIfNotCell(JSValueRegs(argGPR));
JITCompiler::Jump isNotMasqueradesAsUndefined = m_jit.branchTest8(
JITCompiler::Zero,
JITCompiler::Address(argGPR, JSCell::typeInfoFlagsOffset()),
JITCompiler::TrustedImm32(MasqueradesAsUndefined));
done.append(isNotMasqueradesAsUndefined);
GPRReg localGlobalObjectGPR = localGlobalObject.gpr();
GPRReg remoteGlobalObjectGPR = remoteGlobalObject.gpr();
m_jit.move(JITCompiler::TrustedImmPtr(m_jit.graph().globalObjectFor(m_currentNode->origin.semantic)), localGlobalObjectGPR);
m_jit.emitLoadStructure(argGPR, resultGPR, scratch.gpr());
m_jit.loadPtr(JITCompiler::Address(resultGPR, Structure::globalObjectOffset()), remoteGlobalObjectGPR);
m_jit.comparePtr(JITCompiler::Equal, localGlobalObjectGPR, remoteGlobalObjectGPR, resultGPR);
done.append(m_jit.jump());
if (!isKnownCell(operand.node()))
notCell.link(&m_jit);
}
if (!isKnownNotOther(operand.node())) {
m_jit.move(argGPR, resultGPR);
m_jit.and64(JITCompiler::TrustedImm32(~TagBitUndefined), resultGPR);
m_jit.compare64(JITCompiler::Equal, resultGPR, JITCompiler::TrustedImm32(ValueNull), resultGPR);
}
done.link(&m_jit);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(resultGPR, m_currentNode, DataFormatJSBoolean);
}
void SpeculativeJIT::nonSpeculativePeepholeBranchNullOrUndefined(Edge operand, Node* branchNode)
{
ASSERT_WITH_MESSAGE(!masqueradesAsUndefinedWatchpointIsStillValid() || !isKnownCell(operand.node()), "The Compare should have been eliminated, it is known to be always false.");
BasicBlock* taken = branchNode->branchData()->taken.block;
BasicBlock* notTaken = branchNode->branchData()->notTaken.block;
JSValueOperand arg(this, operand, ManualOperandSpeculation);
GPRReg argGPR = arg.gpr();
GPRTemporary result(this, Reuse, arg);
GPRReg resultGPR = result.gpr();
// First, handle the case where "operand" is a cell.
if (masqueradesAsUndefinedWatchpointIsStillValid()) {
if (!isKnownNotCell(operand.node())) {
JITCompiler::Jump isCell = m_jit.branchIfCell(JSValueRegs(argGPR));
addBranch(isCell, notTaken);
}
} else {
GPRTemporary localGlobalObject(this);
GPRTemporary remoteGlobalObject(this);
GPRTemporary scratch(this);
JITCompiler::Jump notCell;
if (!isKnownCell(operand.node()))
notCell = m_jit.branchIfNotCell(JSValueRegs(argGPR));
branchTest8(JITCompiler::Zero,
JITCompiler::Address(argGPR, JSCell::typeInfoFlagsOffset()),
JITCompiler::TrustedImm32(MasqueradesAsUndefined), notTaken);
GPRReg localGlobalObjectGPR = localGlobalObject.gpr();
GPRReg remoteGlobalObjectGPR = remoteGlobalObject.gpr();
m_jit.move(TrustedImmPtr(m_jit.graph().globalObjectFor(m_currentNode->origin.semantic)), localGlobalObjectGPR);
m_jit.emitLoadStructure(argGPR, resultGPR, scratch.gpr());
m_jit.loadPtr(JITCompiler::Address(resultGPR, Structure::globalObjectOffset()), remoteGlobalObjectGPR);
branchPtr(JITCompiler::Equal, localGlobalObjectGPR, remoteGlobalObjectGPR, taken);
if (!isKnownCell(operand.node())) {
jump(notTaken, ForceJump);
notCell.link(&m_jit);
}
}
if (isKnownNotOther(operand.node()))
jump(notTaken);
else {
JITCompiler::RelationalCondition condition = JITCompiler::Equal;
if (taken == nextBlock()) {
condition = JITCompiler::NotEqual;
std::swap(taken, notTaken);
}
m_jit.move(argGPR, resultGPR);
m_jit.and64(JITCompiler::TrustedImm32(~TagBitUndefined), resultGPR);
branch64(condition, resultGPR, JITCompiler::TrustedImm64(ValueNull), taken);
jump(notTaken);
}
}
void SpeculativeJIT::nonSpeculativePeepholeBranch(Node* node, Node* branchNode, MacroAssembler::RelationalCondition cond, S_JITOperation_EJJ helperFunction)
{
BasicBlock* taken = branchNode->branchData()->taken.block;
BasicBlock* notTaken = branchNode->branchData()->notTaken.block;
JITCompiler::ResultCondition callResultCondition = JITCompiler::NonZero;
// The branch instruction will branch to the taken block.
// If taken is next, switch taken with notTaken & invert the branch condition so we can fall through.
if (taken == nextBlock()) {
cond = JITCompiler::invert(cond);
callResultCondition = JITCompiler::Zero;
BasicBlock* tmp = taken;
taken = notTaken;
notTaken = tmp;
}
JSValueOperand arg1(this, node->child1());
JSValueOperand arg2(this, node->child2());
GPRReg arg1GPR = arg1.gpr();
GPRReg arg2GPR = arg2.gpr();
JITCompiler::JumpList slowPath;
if (isKnownNotInteger(node->child1().node()) || isKnownNotInteger(node->child2().node())) {
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
flushRegisters();
callOperation(helperFunction, resultGPR, arg1GPR, arg2GPR);
m_jit.exceptionCheck();
branchTest32(callResultCondition, resultGPR, taken);
} else {
GPRTemporary result(this, Reuse, arg2);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
if (!isKnownInteger(node->child1().node()))
slowPath.append(m_jit.branch64(MacroAssembler::Below, arg1GPR, GPRInfo::tagTypeNumberRegister));
if (!isKnownInteger(node->child2().node()))
slowPath.append(m_jit.branch64(MacroAssembler::Below, arg2GPR, GPRInfo::tagTypeNumberRegister));
branch32(cond, arg1GPR, arg2GPR, taken);
if (!isKnownInteger(node->child1().node()) || !isKnownInteger(node->child2().node())) {
jump(notTaken, ForceJump);
slowPath.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(helperFunction, resultGPR, arg1GPR, arg2GPR);
silentFillAllRegisters(resultGPR);
m_jit.exceptionCheck();
branchTest32(callResultCondition, resultGPR, taken);
}
}
jump(notTaken);
m_indexInBlock = m_block->size() - 1;
m_currentNode = branchNode;
}
template<typename JumpType>
class CompareAndBoxBooleanSlowPathGenerator
: public CallSlowPathGenerator<JumpType, S_JITOperation_EJJ, GPRReg> {
public:
CompareAndBoxBooleanSlowPathGenerator(
JumpType from, SpeculativeJIT* jit,
S_JITOperation_EJJ function, GPRReg result, GPRReg arg1, GPRReg arg2)
: CallSlowPathGenerator<JumpType, S_JITOperation_EJJ, GPRReg>(
from, jit, function, NeedToSpill, ExceptionCheckRequirement::CheckNeeded, result)
, m_arg1(arg1)
, m_arg2(arg2)
{
}
protected:
void generateInternal(SpeculativeJIT* jit) override
{
this->setUp(jit);
this->recordCall(jit->callOperation(this->m_function, this->m_result, m_arg1, m_arg2));
jit->m_jit.and32(JITCompiler::TrustedImm32(1), this->m_result);
jit->m_jit.or32(JITCompiler::TrustedImm32(ValueFalse), this->m_result);
this->tearDown(jit);
}
private:
GPRReg m_arg1;
GPRReg m_arg2;
};
void SpeculativeJIT::nonSpeculativeNonPeepholeCompare(Node* node, MacroAssembler::RelationalCondition cond, S_JITOperation_EJJ helperFunction)
{
ASSERT(node->isBinaryUseKind(UntypedUse));
JSValueOperand arg1(this, node->child1());
JSValueOperand arg2(this, node->child2());
GPRReg arg1GPR = arg1.gpr();
GPRReg arg2GPR = arg2.gpr();
JITCompiler::JumpList slowPath;
if (isKnownNotInteger(node->child1().node()) || isKnownNotInteger(node->child2().node())) {
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
flushRegisters();
callOperation(helperFunction, resultGPR, arg1GPR, arg2GPR);
m_jit.exceptionCheck();
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(resultGPR, m_currentNode, DataFormatJSBoolean, UseChildrenCalledExplicitly);
} else {
GPRTemporary result(this, Reuse, arg2);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
if (!isKnownInteger(node->child1().node()))
slowPath.append(m_jit.branch64(MacroAssembler::Below, arg1GPR, GPRInfo::tagTypeNumberRegister));
if (!isKnownInteger(node->child2().node()))
slowPath.append(m_jit.branch64(MacroAssembler::Below, arg2GPR, GPRInfo::tagTypeNumberRegister));
m_jit.compare32(cond, arg1GPR, arg2GPR, resultGPR);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
if (!isKnownInteger(node->child1().node()) || !isKnownInteger(node->child2().node())) {
addSlowPathGenerator(std::make_unique<CompareAndBoxBooleanSlowPathGenerator<JITCompiler::JumpList>>(
slowPath, this, helperFunction, resultGPR, arg1GPR, arg2GPR));
}
jsValueResult(resultGPR, m_currentNode, DataFormatJSBoolean, UseChildrenCalledExplicitly);
}
}
void SpeculativeJIT::nonSpeculativePeepholeStrictEq(Node* node, Node* branchNode, bool invert)
{
BasicBlock* taken = branchNode->branchData()->taken.block;
BasicBlock* notTaken = branchNode->branchData()->notTaken.block;
// The branch instruction will branch to the taken block.
// If taken is next, switch taken with notTaken & invert the branch condition so we can fall through.
if (taken == nextBlock()) {
invert = !invert;
BasicBlock* tmp = taken;
taken = notTaken;
notTaken = tmp;
}
JSValueOperand arg1(this, node->child1());
JSValueOperand arg2(this, node->child2());
GPRReg arg1GPR = arg1.gpr();
GPRReg arg2GPR = arg2.gpr();
GPRTemporary result(this);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
if (isKnownCell(node->child1().node()) && isKnownCell(node->child2().node())) {
// see if we get lucky: if the arguments are cells and they reference the same
// cell, then they must be strictly equal.
branch64(JITCompiler::Equal, arg1GPR, arg2GPR, invert ? notTaken : taken);
silentSpillAllRegisters(resultGPR);
callOperation(operationCompareStrictEqCell, resultGPR, arg1GPR, arg2GPR);
silentFillAllRegisters(resultGPR);
m_jit.exceptionCheck();
branchTest32(invert ? JITCompiler::Zero : JITCompiler::NonZero, resultGPR, taken);
} else {
m_jit.or64(arg1GPR, arg2GPR, resultGPR);
JITCompiler::Jump twoCellsCase = m_jit.branchTest64(JITCompiler::Zero, resultGPR, GPRInfo::tagMaskRegister);
JITCompiler::Jump leftOK = m_jit.branch64(JITCompiler::AboveOrEqual, arg1GPR, GPRInfo::tagTypeNumberRegister);
JITCompiler::Jump leftDouble = m_jit.branchTest64(JITCompiler::NonZero, arg1GPR, GPRInfo::tagTypeNumberRegister);
leftOK.link(&m_jit);
JITCompiler::Jump rightOK = m_jit.branch64(JITCompiler::AboveOrEqual, arg2GPR, GPRInfo::tagTypeNumberRegister);
JITCompiler::Jump rightDouble = m_jit.branchTest64(JITCompiler::NonZero, arg2GPR, GPRInfo::tagTypeNumberRegister);
rightOK.link(&m_jit);
branch64(invert ? JITCompiler::NotEqual : JITCompiler::Equal, arg1GPR, arg2GPR, taken);
jump(notTaken, ForceJump);
twoCellsCase.link(&m_jit);
branch64(JITCompiler::Equal, arg1GPR, arg2GPR, invert ? notTaken : taken);
leftDouble.link(&m_jit);
rightDouble.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(operationCompareStrictEq, resultGPR, arg1GPR, arg2GPR);
silentFillAllRegisters(resultGPR);
m_jit.exceptionCheck();
branchTest32(invert ? JITCompiler::Zero : JITCompiler::NonZero, resultGPR, taken);
}
jump(notTaken);
}
void SpeculativeJIT::nonSpeculativeNonPeepholeStrictEq(Node* node, bool invert)
{
JSValueOperand arg1(this, node->child1());
JSValueOperand arg2(this, node->child2());
GPRReg arg1GPR = arg1.gpr();
GPRReg arg2GPR = arg2.gpr();
GPRTemporary result(this);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
if (isKnownCell(node->child1().node()) && isKnownCell(node->child2().node())) {
// see if we get lucky: if the arguments are cells and they reference the same
// cell, then they must be strictly equal.
// FIXME: this should flush registers instead of silent spill/fill.
JITCompiler::Jump notEqualCase = m_jit.branch64(JITCompiler::NotEqual, arg1GPR, arg2GPR);
m_jit.move(JITCompiler::TrustedImm64(JSValue::encode(jsBoolean(!invert))), resultGPR);
JITCompiler::Jump done = m_jit.jump();
notEqualCase.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(operationCompareStrictEqCell, resultGPR, arg1GPR, arg2GPR);
silentFillAllRegisters(resultGPR);
m_jit.exceptionCheck();
m_jit.and64(JITCompiler::TrustedImm32(1), resultGPR);
m_jit.or32(JITCompiler::TrustedImm32(ValueFalse), resultGPR);
done.link(&m_jit);
} else {
m_jit.or64(arg1GPR, arg2GPR, resultGPR);
JITCompiler::JumpList slowPathCases;
JITCompiler::Jump twoCellsCase = m_jit.branchTest64(JITCompiler::Zero, resultGPR, GPRInfo::tagMaskRegister);
JITCompiler::Jump leftOK = m_jit.branch64(JITCompiler::AboveOrEqual, arg1GPR, GPRInfo::tagTypeNumberRegister);
slowPathCases.append(m_jit.branchTest64(JITCompiler::NonZero, arg1GPR, GPRInfo::tagTypeNumberRegister));
leftOK.link(&m_jit);
JITCompiler::Jump rightOK = m_jit.branch64(JITCompiler::AboveOrEqual, arg2GPR, GPRInfo::tagTypeNumberRegister);
slowPathCases.append(m_jit.branchTest64(JITCompiler::NonZero, arg2GPR, GPRInfo::tagTypeNumberRegister));
rightOK.link(&m_jit);
m_jit.compare64(invert ? JITCompiler::NotEqual : JITCompiler::Equal, arg1GPR, arg2GPR, resultGPR);
m_jit.or32(JITCompiler::TrustedImm32(ValueFalse), resultGPR);
JITCompiler::Jump done = m_jit.jump();
twoCellsCase.link(&m_jit);
slowPathCases.append(m_jit.branch64(JITCompiler::NotEqual, arg1GPR, arg2GPR));
m_jit.move(JITCompiler::TrustedImm64(JSValue::encode(jsBoolean(!invert))), resultGPR);
addSlowPathGenerator(std::make_unique<CompareAndBoxBooleanSlowPathGenerator<MacroAssembler::JumpList>>(
slowPathCases, this, operationCompareStrictEq, resultGPR, arg1GPR,
arg2GPR));
done.link(&m_jit);
}
jsValueResult(resultGPR, m_currentNode, DataFormatJSBoolean, UseChildrenCalledExplicitly);
}
void SpeculativeJIT::compileMiscStrictEq(Node* node)
{
JSValueOperand op1(this, node->child1(), ManualOperandSpeculation);
JSValueOperand op2(this, node->child2(), ManualOperandSpeculation);
GPRTemporary result(this);
if (node->child1().useKind() == MiscUse)
speculateMisc(node->child1(), op1.jsValueRegs());
if (node->child2().useKind() == MiscUse)
speculateMisc(node->child2(), op2.jsValueRegs());
m_jit.compare64(JITCompiler::Equal, op1.gpr(), op2.gpr(), result.gpr());
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
}
void SpeculativeJIT::emitCall(Node* node)
{
CallLinkInfo::CallType callType;
bool isVarargs = false;
bool isForwardVarargs = false;
bool isTail = false;
bool isEmulatedTail = false;
switch (node->op()) {
case Call:
case CallEval:
callType = CallLinkInfo::Call;
break;
case TailCall:
callType = CallLinkInfo::TailCall;
isTail = true;
break;
case TailCallInlinedCaller:
callType = CallLinkInfo::Call;
isEmulatedTail = true;
break;
case Construct:
callType = CallLinkInfo::Construct;
break;
case CallVarargs:
callType = CallLinkInfo::CallVarargs;
isVarargs = true;
break;
case TailCallVarargs:
callType = CallLinkInfo::TailCallVarargs;
isVarargs = true;
isTail = true;
break;
case TailCallVarargsInlinedCaller:
callType = CallLinkInfo::CallVarargs;
isVarargs = true;
isEmulatedTail = true;
break;
case ConstructVarargs:
callType = CallLinkInfo::ConstructVarargs;
isVarargs = true;
break;
case CallForwardVarargs:
callType = CallLinkInfo::CallVarargs;
isForwardVarargs = true;
break;
case ConstructForwardVarargs:
callType = CallLinkInfo::ConstructVarargs;
isForwardVarargs = true;
break;
case TailCallForwardVarargs:
callType = CallLinkInfo::TailCallVarargs;
isTail = true;
isForwardVarargs = true;
break;
case TailCallForwardVarargsInlinedCaller:
callType = CallLinkInfo::CallVarargs;
isEmulatedTail = true;
isForwardVarargs = true;
break;
default:
DFG_CRASH(m_jit.graph(), node, "bad node type");
break;
}
GPRReg calleeGPR = InvalidGPRReg;
CallFrameShuffleData shuffleData;
// Gotta load the arguments somehow. Varargs is trickier.
if (isVarargs || isForwardVarargs) {
CallVarargsData* data = node->callVarargsData();
GPRReg resultGPR;
unsigned numUsedStackSlots = m_jit.graph().m_nextMachineLocal;
if (isForwardVarargs) {
flushRegisters();
if (node->child3())
use(node->child3());
GPRReg scratchGPR1;
GPRReg scratchGPR2;
GPRReg scratchGPR3;
scratchGPR1 = JITCompiler::selectScratchGPR();
scratchGPR2 = JITCompiler::selectScratchGPR(scratchGPR1);
scratchGPR3 = JITCompiler::selectScratchGPR(scratchGPR1, scratchGPR2);
m_jit.move(TrustedImm32(numUsedStackSlots), scratchGPR2);
JITCompiler::JumpList slowCase;
InlineCallFrame* inlineCallFrame;
if (node->child3())
inlineCallFrame = node->child3()->origin.semantic.inlineCallFrame;
else
inlineCallFrame = node->origin.semantic.inlineCallFrame;
emitSetupVarargsFrameFastCase(m_jit, scratchGPR2, scratchGPR1, scratchGPR2, scratchGPR3, inlineCallFrame, data->firstVarArgOffset, slowCase);
JITCompiler::Jump done = m_jit.jump();
slowCase.link(&m_jit);
callOperation(operationThrowStackOverflowForVarargs);
m_jit.exceptionCheck();
m_jit.abortWithReason(DFGVarargsThrowingPathDidNotThrow);
done.link(&m_jit);
resultGPR = scratchGPR2;
} else {
GPRReg argumentsGPR;
GPRReg scratchGPR1;
GPRReg scratchGPR2;
GPRReg scratchGPR3;
auto loadArgumentsGPR = [&] (GPRReg reservedGPR) {
if (reservedGPR != InvalidGPRReg)
lock(reservedGPR);
JSValueOperand arguments(this, node->child3());
argumentsGPR = arguments.gpr();
if (reservedGPR != InvalidGPRReg)
unlock(reservedGPR);
flushRegisters();
scratchGPR1 = JITCompiler::selectScratchGPR(argumentsGPR, reservedGPR);
scratchGPR2 = JITCompiler::selectScratchGPR(argumentsGPR, scratchGPR1, reservedGPR);
scratchGPR3 = JITCompiler::selectScratchGPR(argumentsGPR, scratchGPR1, scratchGPR2, reservedGPR);
};
loadArgumentsGPR(InvalidGPRReg);
DFG_ASSERT(m_jit.graph(), node, isFlushed());
// Right now, arguments is in argumentsGPR and the register file is flushed.
callOperation(operationSizeFrameForVarargs, GPRInfo::returnValueGPR, argumentsGPR, numUsedStackSlots, data->firstVarArgOffset);
m_jit.exceptionCheck();
// Now we have the argument count of the callee frame, but we've lost the arguments operand.
// Reconstruct the arguments operand while preserving the callee frame.
loadArgumentsGPR(GPRInfo::returnValueGPR);
m_jit.move(TrustedImm32(numUsedStackSlots), scratchGPR1);
emitSetVarargsFrame(m_jit, GPRInfo::returnValueGPR, false, scratchGPR1, scratchGPR1);
m_jit.addPtr(TrustedImm32(-(sizeof(CallerFrameAndPC) + WTF::roundUpToMultipleOf(stackAlignmentBytes(), 5 * sizeof(void*)))), scratchGPR1, JITCompiler::stackPointerRegister);
callOperation(operationSetupVarargsFrame, GPRInfo::returnValueGPR, scratchGPR1, argumentsGPR, data->firstVarArgOffset, GPRInfo::returnValueGPR);
m_jit.exceptionCheck();
resultGPR = GPRInfo::returnValueGPR;
}
m_jit.addPtr(TrustedImm32(sizeof(CallerFrameAndPC)), resultGPR, JITCompiler::stackPointerRegister);
DFG_ASSERT(m_jit.graph(), node, isFlushed());
// We don't need the arguments array anymore.
if (isVarargs)
use(node->child3());
// Now set up the "this" argument.
JSValueOperand thisArgument(this, node->child2());
GPRReg thisArgumentGPR = thisArgument.gpr();
thisArgument.use();
m_jit.store64(thisArgumentGPR, JITCompiler::calleeArgumentSlot(0));
} else {
// The call instruction's first child is the function; the subsequent children are the
// arguments.
int numPassedArgs = node->numChildren() - 1;
if (node->op() == TailCall) {
Edge calleeEdge = m_jit.graph().child(node, 0);
JSValueOperand callee(this, calleeEdge);
calleeGPR = callee.gpr();
callee.use();
shuffleData.tagTypeNumber = GPRInfo::tagTypeNumberRegister;
shuffleData.numLocals = m_jit.graph().frameRegisterCount();
shuffleData.callee = ValueRecovery::inGPR(calleeGPR, DataFormatJS);
shuffleData.args.resize(numPassedArgs);
for (int i = 0; i < numPassedArgs; ++i) {
Edge argEdge = m_jit.graph().varArgChild(node, i + 1);
GenerationInfo& info = generationInfo(argEdge.node());
use(argEdge);
shuffleData.args[i] = info.recovery(argEdge->virtualRegister());
}
shuffleData.setupCalleeSaveRegisters(m_jit.codeBlock());
} else {
m_jit.store32(MacroAssembler::TrustedImm32(numPassedArgs), JITCompiler::calleeFramePayloadSlot(CallFrameSlot::argumentCount));
for (int i = 0; i < numPassedArgs; i++) {
Edge argEdge = m_jit.graph().m_varArgChildren[node->firstChild() + 1 + i];
JSValueOperand arg(this, argEdge);
GPRReg argGPR = arg.gpr();
use(argEdge);
m_jit.store64(argGPR, JITCompiler::calleeArgumentSlot(i));
}
}
}
if (node->op() != TailCall) {
Edge calleeEdge = m_jit.graph().child(node, 0);
JSValueOperand callee(this, calleeEdge);
calleeGPR = callee.gpr();
callee.use();
m_jit.store64(calleeGPR, JITCompiler::calleeFrameSlot(CallFrameSlot::callee));
flushRegisters();
}
CodeOrigin staticOrigin = node->origin.semantic;
ASSERT(!isTail || !staticOrigin.inlineCallFrame || !staticOrigin.inlineCallFrame->getCallerSkippingTailCalls());
ASSERT(!isEmulatedTail || (staticOrigin.inlineCallFrame && staticOrigin.inlineCallFrame->getCallerSkippingTailCalls()));
CodeOrigin dynamicOrigin =
isEmulatedTail ? *staticOrigin.inlineCallFrame->getCallerSkippingTailCalls() : staticOrigin;
CallSiteIndex callSite = m_jit.recordCallSiteAndGenerateExceptionHandlingOSRExitIfNeeded(dynamicOrigin, m_stream->size());
m_jit.emitStoreCallSiteIndex(callSite);
auto setResultAndResetStack = [&] () {
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
m_jit.move(GPRInfo::returnValueGPR, resultGPR);
jsValueResult(resultGPR, m_currentNode, DataFormatJS, UseChildrenCalledExplicitly);
// After the calls are done, we need to reestablish our stack
// pointer. We rely on this for varargs calls, calls with arity
// mismatch (the callframe is slided) and tail calls.
m_jit.addPtr(TrustedImm32(m_jit.graph().stackPointerOffset() * sizeof(Register)), GPRInfo::callFrameRegister, JITCompiler::stackPointerRegister);
};
CallLinkInfo* callLinkInfo = m_jit.codeBlock()->addCallLinkInfo();
callLinkInfo->setUpCall(callType, m_currentNode->origin.semantic, calleeGPR);
if (node->op() == CallEval) {
// We want to call operationCallEval but we don't want to overwrite the parameter area in
// which we have created a prototypical eval call frame. This means that we have to
// subtract stack to make room for the call. Lucky for us, at this point we have the whole
// register file to ourselves.
m_jit.addPtr(TrustedImm32(-static_cast<ptrdiff_t>(sizeof(CallerFrameAndPC))), JITCompiler::stackPointerRegister, GPRInfo::regT0);
m_jit.storePtr(GPRInfo::callFrameRegister, JITCompiler::Address(GPRInfo::regT0, CallFrame::callerFrameOffset()));
// Now we need to make room for:
// - The caller frame and PC of a call to operationCallEval.
// - Potentially two arguments on the stack.
unsigned requiredBytes = sizeof(CallerFrameAndPC) + sizeof(ExecState*) * 2;
requiredBytes = WTF::roundUpToMultipleOf(stackAlignmentBytes(), requiredBytes);
m_jit.subPtr(TrustedImm32(requiredBytes), JITCompiler::stackPointerRegister);
m_jit.setupArgumentsWithExecState(GPRInfo::regT0);
prepareForExternalCall();
m_jit.appendCall(operationCallEval);
m_jit.exceptionCheck();
JITCompiler::Jump done = m_jit.branchTest64(JITCompiler::NonZero, GPRInfo::returnValueGPR);
// This is the part where we meant to make a normal call. Oops.
m_jit.addPtr(TrustedImm32(requiredBytes), JITCompiler::stackPointerRegister);
m_jit.load64(JITCompiler::calleeFrameSlot(CallFrameSlot::callee), GPRInfo::regT0);
m_jit.emitDumbVirtualCall(callLinkInfo);
done.link(&m_jit);
setResultAndResetStack();
return;
}
JITCompiler::DataLabelPtr targetToCheck;
JITCompiler::Jump slowPath = m_jit.branchPtrWithPatch(MacroAssembler::NotEqual, calleeGPR, targetToCheck, MacroAssembler::TrustedImmPtr(0));
if (isTail) {
if (node->op() == TailCall) {
callLinkInfo->setFrameShuffleData(shuffleData);
CallFrameShuffler(m_jit, shuffleData).prepareForTailCall();
} else {
m_jit.emitRestoreCalleeSaves();
m_jit.prepareForTailCallSlow();
}
}
JITCompiler::Call fastCall = isTail ? m_jit.nearTailCall() : m_jit.nearCall();
JITCompiler::Jump done = m_jit.jump();
slowPath.link(&m_jit);
if (node->op() == TailCall) {
CallFrameShuffler callFrameShuffler(m_jit, shuffleData);
callFrameShuffler.setCalleeJSValueRegs(JSValueRegs(GPRInfo::regT0));
callFrameShuffler.prepareForSlowPath();
} else {
m_jit.move(calleeGPR, GPRInfo::regT0); // Callee needs to be in regT0
if (isTail)
m_jit.emitRestoreCalleeSaves(); // This needs to happen after we moved calleeGPR to regT0
}
m_jit.move(MacroAssembler::TrustedImmPtr(callLinkInfo), GPRInfo::regT2); // Link info needs to be in regT2
JITCompiler::Call slowCall = m_jit.nearCall();
done.link(&m_jit);
if (isTail)
m_jit.abortWithReason(JITDidReturnFromTailCall);
else
setResultAndResetStack();
m_jit.addJSCall(fastCall, slowCall, targetToCheck, callLinkInfo);
}
// Clang should allow unreachable [[clang::fallthrough]] in template functions if any template expansion uses it
// http://llvm.org/bugs/show_bug.cgi?id=18619
#if COMPILER(CLANG) && defined(__has_warning)
#pragma clang diagnostic push
#if __has_warning("-Wimplicit-fallthrough")
#pragma clang diagnostic ignored "-Wimplicit-fallthrough"
#endif
#endif
template<bool strict>
GPRReg SpeculativeJIT::fillSpeculateInt32Internal(Edge edge, DataFormat& returnFormat)
{
AbstractValue& value = m_state.forNode(edge);
SpeculatedType type = value.m_type;
ASSERT(edge.useKind() != KnownInt32Use || !(value.m_type & ~SpecInt32Only));
m_interpreter.filter(value, SpecInt32Only);
if (value.isClear()) {
terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
returnFormat = DataFormatInt32;
return allocate();
}
VirtualRegister virtualRegister = edge->virtualRegister();
GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
switch (info.registerFormat()) {
case DataFormatNone: {
GPRReg gpr = allocate();
if (edge->hasConstant()) {
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
ASSERT(edge->isInt32Constant());
m_jit.move(MacroAssembler::Imm32(edge->asInt32()), gpr);
info.fillInt32(*m_stream, gpr);
returnFormat = DataFormatInt32;
return gpr;
}
DataFormat spillFormat = info.spillFormat();
DFG_ASSERT(m_jit.graph(), m_currentNode, (spillFormat & DataFormatJS) || spillFormat == DataFormatInt32);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
if (spillFormat == DataFormatJSInt32 || spillFormat == DataFormatInt32) {
// If we know this was spilled as an integer we can fill without checking.
if (strict) {
m_jit.load32(JITCompiler::addressFor(virtualRegister), gpr);
info.fillInt32(*m_stream, gpr);
returnFormat = DataFormatInt32;
return gpr;
}
if (spillFormat == DataFormatInt32) {
m_jit.load32(JITCompiler::addressFor(virtualRegister), gpr);
info.fillInt32(*m_stream, gpr);
returnFormat = DataFormatInt32;
} else {
m_jit.load64(JITCompiler::addressFor(virtualRegister), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJSInt32);
returnFormat = DataFormatJSInt32;
}
return gpr;
}
m_jit.load64(JITCompiler::addressFor(virtualRegister), gpr);
// Fill as JSValue, and fall through.
info.fillJSValue(*m_stream, gpr, DataFormatJSInt32);
m_gprs.unlock(gpr);
FALLTHROUGH;
}
case DataFormatJS: {
DFG_ASSERT(m_jit.graph(), m_currentNode, !(type & SpecInt52Only));
// Check the value is an integer.
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
if (type & ~SpecInt32Only)
speculationCheck(BadType, JSValueRegs(gpr), edge, m_jit.branch64(MacroAssembler::Below, gpr, GPRInfo::tagTypeNumberRegister));
info.fillJSValue(*m_stream, gpr, DataFormatJSInt32);
// If !strict we're done, return.
if (!strict) {
returnFormat = DataFormatJSInt32;
return gpr;
}
// else fall through & handle as DataFormatJSInt32.
m_gprs.unlock(gpr);
FALLTHROUGH;
}
case DataFormatJSInt32: {
// In a strict fill we need to strip off the value tag.
if (strict) {
GPRReg gpr = info.gpr();
GPRReg result;
// If the register has already been locked we need to take a copy.
// If not, we'll zero extend in place, so mark on the info that this is now type DataFormatInt32, not DataFormatJSInt32.
if (m_gprs.isLocked(gpr))
result = allocate();
else {
m_gprs.lock(gpr);
info.fillInt32(*m_stream, gpr);
result = gpr;
}
m_jit.zeroExtend32ToPtr(gpr, result);
returnFormat = DataFormatInt32;
return result;
}
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
returnFormat = DataFormatJSInt32;
return gpr;
}
case DataFormatInt32: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
returnFormat = DataFormatInt32;
return gpr;
}
case DataFormatJSDouble:
case DataFormatCell:
case DataFormatBoolean:
case DataFormatJSCell:
case DataFormatJSBoolean:
case DataFormatDouble:
case DataFormatStorage:
case DataFormatInt52:
case DataFormatStrictInt52:
DFG_CRASH(m_jit.graph(), m_currentNode, "Bad data format");
default:
DFG_CRASH(m_jit.graph(), m_currentNode, "Corrupt data format");
return InvalidGPRReg;
}
}
#if COMPILER(CLANG) && defined(__has_warning)
#pragma clang diagnostic pop
#endif
GPRReg SpeculativeJIT::fillSpeculateInt32(Edge edge, DataFormat& returnFormat)
{
return fillSpeculateInt32Internal<false>(edge, returnFormat);
}
GPRReg SpeculativeJIT::fillSpeculateInt32Strict(Edge edge)
{
DataFormat mustBeDataFormatInt32;
GPRReg result = fillSpeculateInt32Internal<true>(edge, mustBeDataFormatInt32);
DFG_ASSERT(m_jit.graph(), m_currentNode, mustBeDataFormatInt32 == DataFormatInt32);
return result;
}
GPRReg SpeculativeJIT::fillSpeculateInt52(Edge edge, DataFormat desiredFormat)
{
ASSERT(desiredFormat == DataFormatInt52 || desiredFormat == DataFormatStrictInt52);
AbstractValue& value = m_state.forNode(edge);
m_interpreter.filter(value, SpecAnyInt);
if (value.isClear()) {
terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
return allocate();
}
VirtualRegister virtualRegister = edge->virtualRegister();
GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
switch (info.registerFormat()) {
case DataFormatNone: {
GPRReg gpr = allocate();
if (edge->hasConstant()) {
JSValue jsValue = edge->asJSValue();
ASSERT(jsValue.isAnyInt());
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
int64_t value = jsValue.asAnyInt();
if (desiredFormat == DataFormatInt52)
value = value << JSValue::int52ShiftAmount;
m_jit.move(MacroAssembler::Imm64(value), gpr);
info.fillGPR(*m_stream, gpr, desiredFormat);
return gpr;
}
DataFormat spillFormat = info.spillFormat();
DFG_ASSERT(m_jit.graph(), m_currentNode, spillFormat == DataFormatInt52 || spillFormat == DataFormatStrictInt52);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.load64(JITCompiler::addressFor(virtualRegister), gpr);
if (desiredFormat == DataFormatStrictInt52) {
if (spillFormat == DataFormatInt52)
m_jit.rshift64(TrustedImm32(JSValue::int52ShiftAmount), gpr);
info.fillStrictInt52(*m_stream, gpr);
return gpr;
}
if (spillFormat == DataFormatStrictInt52)
m_jit.lshift64(TrustedImm32(JSValue::int52ShiftAmount), gpr);
info.fillInt52(*m_stream, gpr);
return gpr;
}
case DataFormatStrictInt52: {
GPRReg gpr = info.gpr();
bool wasLocked = m_gprs.isLocked(gpr);
lock(gpr);
if (desiredFormat == DataFormatStrictInt52)
return gpr;
if (wasLocked) {
GPRReg result = allocate();
m_jit.move(gpr, result);
unlock(gpr);
gpr = result;
} else
info.fillInt52(*m_stream, gpr);
m_jit.lshift64(TrustedImm32(JSValue::int52ShiftAmount), gpr);
return gpr;
}
case DataFormatInt52: {
GPRReg gpr = info.gpr();
bool wasLocked = m_gprs.isLocked(gpr);
lock(gpr);
if (desiredFormat == DataFormatInt52)
return gpr;
if (wasLocked) {
GPRReg result = allocate();
m_jit.move(gpr, result);
unlock(gpr);
gpr = result;
} else
info.fillStrictInt52(*m_stream, gpr);
m_jit.rshift64(TrustedImm32(JSValue::int52ShiftAmount), gpr);
return gpr;
}
default:
DFG_CRASH(m_jit.graph(), m_currentNode, "Bad data format");
return InvalidGPRReg;
}
}
FPRReg SpeculativeJIT::fillSpeculateDouble(Edge edge)
{
ASSERT(edge.useKind() == DoubleRepUse || edge.useKind() == DoubleRepRealUse || edge.useKind() == DoubleRepAnyIntUse);
ASSERT(edge->hasDoubleResult());
VirtualRegister virtualRegister = edge->virtualRegister();
GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
if (info.registerFormat() == DataFormatNone) {
if (edge->hasConstant()) {
if (edge->isNumberConstant()) {
FPRReg fpr = fprAllocate();
int64_t doubleAsInt = reinterpretDoubleToInt64(edge->asNumber());
if (!doubleAsInt)
m_jit.moveZeroToDouble(fpr);
else {
GPRReg gpr = allocate();
m_jit.move(MacroAssembler::Imm64(doubleAsInt), gpr);
m_jit.move64ToDouble(gpr, fpr);
unlock(gpr);
}
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
return fpr;
}
terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
return fprAllocate();
}
DataFormat spillFormat = info.spillFormat();
if (spillFormat != DataFormatDouble) {
DFG_CRASH(
m_jit.graph(), m_currentNode, toCString(
"Expected ", edge, " to have double format but instead it is spilled as ",
dataFormatToString(spillFormat)).data());
}
DFG_ASSERT(m_jit.graph(), m_currentNode, spillFormat == DataFormatDouble);
FPRReg fpr = fprAllocate();
m_jit.loadDouble(JITCompiler::addressFor(virtualRegister), fpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
return fpr;
}
DFG_ASSERT(m_jit.graph(), m_currentNode, info.registerFormat() == DataFormatDouble);
FPRReg fpr = info.fpr();
m_fprs.lock(fpr);
return fpr;
}
GPRReg SpeculativeJIT::fillSpeculateCell(Edge edge)
{
AbstractValue& value = m_state.forNode(edge);
SpeculatedType type = value.m_type;
ASSERT((edge.useKind() != KnownCellUse && edge.useKind() != KnownStringUse) || !(value.m_type & ~SpecCell));
m_interpreter.filter(value, SpecCell);
if (value.isClear()) {
terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
return allocate();
}
VirtualRegister virtualRegister = edge->virtualRegister();
GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
switch (info.registerFormat()) {
case DataFormatNone: {
GPRReg gpr = allocate();
if (edge->hasConstant()) {
JSValue jsValue = edge->asJSValue();
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
m_jit.move(MacroAssembler::TrustedImm64(JSValue::encode(jsValue)), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJSCell);
return gpr;
}
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.load64(JITCompiler::addressFor(virtualRegister), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJS);
if (type & ~SpecCell)
speculationCheck(BadType, JSValueRegs(gpr), edge, m_jit.branchIfNotCell(JSValueRegs(gpr)));
info.fillJSValue(*m_stream, gpr, DataFormatJSCell);
return gpr;
}
case DataFormatCell:
case DataFormatJSCell: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
if (!ASSERT_DISABLED) {
MacroAssembler::Jump checkCell = m_jit.branchIfCell(JSValueRegs(gpr));
m_jit.abortWithReason(DFGIsNotCell);
checkCell.link(&m_jit);
}
return gpr;
}
case DataFormatJS: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
if (type & ~SpecCell)
speculationCheck(BadType, JSValueRegs(gpr), edge, m_jit.branchIfNotCell(JSValueRegs(gpr)));
info.fillJSValue(*m_stream, gpr, DataFormatJSCell);
return gpr;
}
case DataFormatJSInt32:
case DataFormatInt32:
case DataFormatJSDouble:
case DataFormatJSBoolean:
case DataFormatBoolean:
case DataFormatDouble:
case DataFormatStorage:
case DataFormatInt52:
case DataFormatStrictInt52:
DFG_CRASH(m_jit.graph(), m_currentNode, "Bad data format");
default:
DFG_CRASH(m_jit.graph(), m_currentNode, "Corrupt data format");
return InvalidGPRReg;
}
}
GPRReg SpeculativeJIT::fillSpeculateBoolean(Edge edge)
{
AbstractValue& value = m_state.forNode(edge);
SpeculatedType type = value.m_type;
ASSERT(edge.useKind() != KnownBooleanUse || !(value.m_type & ~SpecBoolean));
m_interpreter.filter(value, SpecBoolean);
if (value.isClear()) {
terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
return allocate();
}
VirtualRegister virtualRegister = edge->virtualRegister();
GenerationInfo& info = generationInfoFromVirtualRegister(virtualRegister);
switch (info.registerFormat()) {
case DataFormatNone: {
GPRReg gpr = allocate();
if (edge->hasConstant()) {
JSValue jsValue = edge->asJSValue();
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
m_jit.move(MacroAssembler::TrustedImm64(JSValue::encode(jsValue)), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJSBoolean);
return gpr;
}
DFG_ASSERT(m_jit.graph(), m_currentNode, info.spillFormat() & DataFormatJS);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.load64(JITCompiler::addressFor(virtualRegister), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJS);
if (type & ~SpecBoolean) {
m_jit.xor64(TrustedImm32(static_cast<int32_t>(ValueFalse)), gpr);
speculationCheck(BadType, JSValueRegs(gpr), edge, m_jit.branchTest64(MacroAssembler::NonZero, gpr, TrustedImm32(static_cast<int32_t>(~1))), SpeculationRecovery(BooleanSpeculationCheck, gpr, InvalidGPRReg));
m_jit.xor64(TrustedImm32(static_cast<int32_t>(ValueFalse)), gpr);
}
info.fillJSValue(*m_stream, gpr, DataFormatJSBoolean);
return gpr;
}
case DataFormatBoolean:
case DataFormatJSBoolean: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
return gpr;
}
case DataFormatJS: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
if (type & ~SpecBoolean) {
m_jit.xor64(TrustedImm32(static_cast<int32_t>(ValueFalse)), gpr);
speculationCheck(BadType, JSValueRegs(gpr), edge, m_jit.branchTest64(MacroAssembler::NonZero, gpr, TrustedImm32(static_cast<int32_t>(~1))), SpeculationRecovery(BooleanSpeculationCheck, gpr, InvalidGPRReg));
m_jit.xor64(TrustedImm32(static_cast<int32_t>(ValueFalse)), gpr);
}
info.fillJSValue(*m_stream, gpr, DataFormatJSBoolean);
return gpr;
}
case DataFormatJSInt32:
case DataFormatInt32:
case DataFormatJSDouble:
case DataFormatJSCell:
case DataFormatCell:
case DataFormatDouble:
case DataFormatStorage:
case DataFormatInt52:
case DataFormatStrictInt52:
DFG_CRASH(m_jit.graph(), m_currentNode, "Bad data format");
default:
DFG_CRASH(m_jit.graph(), m_currentNode, "Corrupt data format");
return InvalidGPRReg;
}
}
void SpeculativeJIT::compileBaseValueStoreBarrier(Edge& baseEdge, Edge& valueEdge)
{
ASSERT(!isKnownNotCell(valueEdge.node()));
SpeculateCellOperand base(this, baseEdge);
JSValueOperand value(this, valueEdge);
GPRTemporary scratch1(this);
GPRTemporary scratch2(this);
writeBarrier(base.gpr(), value.gpr(), valueEdge, scratch1.gpr(), scratch2.gpr());
}
void SpeculativeJIT::compileObjectEquality(Node* node)
{
SpeculateCellOperand op1(this, node->child1());
SpeculateCellOperand op2(this, node->child2());
GPRTemporary result(this, Reuse, op1);
GPRReg op1GPR = op1.gpr();
GPRReg op2GPR = op2.gpr();
GPRReg resultGPR = result.gpr();
if (masqueradesAsUndefinedWatchpointIsStillValid()) {
DFG_TYPE_CHECK(
JSValueSource::unboxedCell(op1GPR), node->child1(), SpecObject, m_jit.branchIfNotObject(op1GPR));
DFG_TYPE_CHECK(
JSValueSource::unboxedCell(op2GPR), node->child2(), SpecObject, m_jit.branchIfNotObject(op2GPR));
} else {
DFG_TYPE_CHECK(
JSValueSource::unboxedCell(op1GPR), node->child1(), SpecObject, m_jit.branchIfNotObject(op1GPR));
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), node->child1(),
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(op1GPR, JSCell::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined)));
DFG_TYPE_CHECK(
JSValueSource::unboxedCell(op2GPR), node->child2(), SpecObject, m_jit.branchIfNotObject(op2GPR));
speculationCheck(BadType, JSValueSource::unboxedCell(op2GPR), node->child2(),
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(op2GPR, JSCell::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined)));
}
m_jit.compare64(MacroAssembler::Equal, op1GPR, op2GPR, resultGPR);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(resultGPR, m_currentNode, DataFormatJSBoolean);
}
void SpeculativeJIT::compileObjectStrictEquality(Edge objectChild, Edge otherChild)
{
SpeculateCellOperand op1(this, objectChild);
JSValueOperand op2(this, otherChild);
GPRTemporary result(this);
GPRReg op1GPR = op1.gpr();
GPRReg op2GPR = op2.gpr();
GPRReg resultGPR = result.gpr();
DFG_TYPE_CHECK(JSValueSource::unboxedCell(op1GPR), objectChild, SpecObject, m_jit.branchIfNotObject(op1GPR));
// At this point we know that we can perform a straight-forward equality comparison on pointer
// values because we are doing strict equality.
m_jit.compare64(MacroAssembler::Equal, op1GPR, op2GPR, resultGPR);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(resultGPR, m_currentNode, DataFormatJSBoolean);
}
void SpeculativeJIT::compilePeepHoleObjectStrictEquality(Edge objectChild, Edge otherChild, Node* branchNode)
{
BasicBlock* taken = branchNode->branchData()->taken.block;
BasicBlock* notTaken = branchNode->branchData()->notTaken.block;
SpeculateCellOperand op1(this, objectChild);
JSValueOperand op2(this, otherChild);
GPRReg op1GPR = op1.gpr();
GPRReg op2GPR = op2.gpr();
DFG_TYPE_CHECK(JSValueSource::unboxedCell(op1GPR), objectChild, SpecObject, m_jit.branchIfNotObject(op1GPR));
if (taken == nextBlock()) {
branchPtr(MacroAssembler::NotEqual, op1GPR, op2GPR, notTaken);
jump(taken);
} else {
branchPtr(MacroAssembler::Equal, op1GPR, op2GPR, taken);
jump(notTaken);
}
}
void SpeculativeJIT::compileObjectToObjectOrOtherEquality(Edge leftChild, Edge rightChild)
{
SpeculateCellOperand op1(this, leftChild);
JSValueOperand op2(this, rightChild, ManualOperandSpeculation);
GPRTemporary result(this);
GPRReg op1GPR = op1.gpr();
GPRReg op2GPR = op2.gpr();
GPRReg resultGPR = result.gpr();
bool masqueradesAsUndefinedWatchpointValid =
masqueradesAsUndefinedWatchpointIsStillValid();
if (masqueradesAsUndefinedWatchpointValid) {
DFG_TYPE_CHECK(
JSValueSource::unboxedCell(op1GPR), leftChild, SpecObject, m_jit.branchIfNotObject(op1GPR));
} else {
DFG_TYPE_CHECK(
JSValueSource::unboxedCell(op1GPR), leftChild, SpecObject, m_jit.branchIfNotObject(op1GPR));
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), leftChild,
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(op1GPR, JSCell::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined)));
}
// It seems that most of the time when programs do a == b where b may be either null/undefined
// or an object, b is usually an object. Balance the branches to make that case fast.
MacroAssembler::Jump rightNotCell = m_jit.branchIfNotCell(JSValueRegs(op2GPR));
// We know that within this branch, rightChild must be a cell.
if (masqueradesAsUndefinedWatchpointValid) {
DFG_TYPE_CHECK(
JSValueRegs(op2GPR), rightChild, (~SpecCell) | SpecObject, m_jit.branchIfNotObject(op2GPR));
} else {
DFG_TYPE_CHECK(
JSValueRegs(op2GPR), rightChild, (~SpecCell) | SpecObject, m_jit.branchIfNotObject(op2GPR));
speculationCheck(BadType, JSValueRegs(op2GPR), rightChild,
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(op2GPR, JSCell::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined)));
}
// At this point we know that we can perform a straight-forward equality comparison on pointer
// values because both left and right are pointers to objects that have no special equality
// protocols.
m_jit.compare64(MacroAssembler::Equal, op1GPR, op2GPR, resultGPR);
MacroAssembler::Jump done = m_jit.jump();
rightNotCell.link(&m_jit);
// We know that within this branch, rightChild must not be a cell. Check if that is enough to
// prove that it is either null or undefined.
if (needsTypeCheck(rightChild, SpecCell | SpecOther)) {
m_jit.move(op2GPR, resultGPR);
m_jit.and64(MacroAssembler::TrustedImm32(~TagBitUndefined), resultGPR);
typeCheck(
JSValueRegs(op2GPR), rightChild, SpecCell | SpecOther,
m_jit.branch64(
MacroAssembler::NotEqual, resultGPR,
MacroAssembler::TrustedImm64(ValueNull)));
}
m_jit.move(TrustedImm32(0), result.gpr());
done.link(&m_jit);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(resultGPR, m_currentNode, DataFormatJSBoolean);
}
void SpeculativeJIT::compilePeepHoleObjectToObjectOrOtherEquality(Edge leftChild, Edge rightChild, Node* branchNode)
{
BasicBlock* taken = branchNode->branchData()->taken.block;
BasicBlock* notTaken = branchNode->branchData()->notTaken.block;
SpeculateCellOperand op1(this, leftChild);
JSValueOperand op2(this, rightChild, ManualOperandSpeculation);
GPRTemporary result(this);
GPRReg op1GPR = op1.gpr();
GPRReg op2GPR = op2.gpr();
GPRReg resultGPR = result.gpr();
bool masqueradesAsUndefinedWatchpointValid =
masqueradesAsUndefinedWatchpointIsStillValid();
if (masqueradesAsUndefinedWatchpointValid) {
DFG_TYPE_CHECK(
JSValueSource::unboxedCell(op1GPR), leftChild, SpecObject, m_jit.branchIfNotObject(op1GPR));
} else {
DFG_TYPE_CHECK(
JSValueSource::unboxedCell(op1GPR), leftChild, SpecObject, m_jit.branchIfNotObject(op1GPR));
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), leftChild,
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(op1GPR, JSCell::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined)));
}
// It seems that most of the time when programs do a == b where b may be either null/undefined
// or an object, b is usually an object. Balance the branches to make that case fast.
MacroAssembler::Jump rightNotCell = m_jit.branchIfNotCell(JSValueRegs(op2GPR));
// We know that within this branch, rightChild must be a cell.
if (masqueradesAsUndefinedWatchpointValid) {
DFG_TYPE_CHECK(
JSValueRegs(op2GPR), rightChild, (~SpecCell) | SpecObject, m_jit.branchIfNotObject(op2GPR));
} else {
DFG_TYPE_CHECK(
JSValueRegs(op2GPR), rightChild, (~SpecCell) | SpecObject, m_jit.branchIfNotObject(op2GPR));
speculationCheck(BadType, JSValueRegs(op2GPR), rightChild,
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(op2GPR, JSCell::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined)));
}
// At this point we know that we can perform a straight-forward equality comparison on pointer
// values because both left and right are pointers to objects that have no special equality
// protocols.
branch64(MacroAssembler::Equal, op1GPR, op2GPR, taken);
// We know that within this branch, rightChild must not be a cell. Check if that is enough to
// prove that it is either null or undefined.
if (!needsTypeCheck(rightChild, SpecCell | SpecOther))
rightNotCell.link(&m_jit);
else {
jump(notTaken, ForceJump);
rightNotCell.link(&m_jit);
m_jit.move(op2GPR, resultGPR);
m_jit.and64(MacroAssembler::TrustedImm32(~TagBitUndefined), resultGPR);
typeCheck(
JSValueRegs(op2GPR), rightChild, SpecCell | SpecOther, m_jit.branch64(
MacroAssembler::NotEqual, resultGPR,
MacroAssembler::TrustedImm64(ValueNull)));
}
jump(notTaken);
}
void SpeculativeJIT::compileSymbolUntypedEquality(Node* node, Edge symbolEdge, Edge untypedEdge)
{
SpeculateCellOperand symbol(this, symbolEdge);
JSValueOperand untyped(this, untypedEdge);
GPRTemporary result(this, Reuse, symbol, untyped);
GPRReg symbolGPR = symbol.gpr();
GPRReg untypedGPR = untyped.gpr();
GPRReg resultGPR = result.gpr();
speculateSymbol(symbolEdge, symbolGPR);
// At this point we know that we can perform a straight-forward equality comparison on pointer
// values because we are doing strict equality.
m_jit.compare64(MacroAssembler::Equal, symbolGPR, untypedGPR, resultGPR);
unblessedBooleanResult(resultGPR, node);
}
void SpeculativeJIT::compileInt32Compare(Node* node, MacroAssembler::RelationalCondition condition)
{
if (node->child1()->isInt32Constant()) {
SpeculateInt32Operand op2(this, node->child2());
GPRTemporary result(this, Reuse, op2);
int32_t imm = node->child1()->asInt32();
m_jit.compare32(condition, JITCompiler::Imm32(imm), op2.gpr(), result.gpr());
// If we add a DataFormatBool, we should use it here.
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), m_currentNode, DataFormatJSBoolean);
} else if (node->child2()->isInt32Constant()) {
SpeculateInt32Operand op1(this, node->child1());
GPRTemporary result(this, Reuse, op1);
int32_t imm = node->child2()->asInt32();
m_jit.compare32(condition, op1.gpr(), JITCompiler::Imm32(imm), result.gpr());
// If we add a DataFormatBool, we should use it here.
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), m_currentNode, DataFormatJSBoolean);
} else {
SpeculateInt32Operand op1(this, node->child1());
SpeculateInt32Operand op2(this, node->child2());
GPRTemporary result(this, Reuse, op1, op2);
m_jit.compare32(condition, op1.gpr(), op2.gpr(), result.gpr());
// If we add a DataFormatBool, we should use it here.
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), m_currentNode, DataFormatJSBoolean);
}
}
void SpeculativeJIT::compileInt52Compare(Node* node, MacroAssembler::RelationalCondition condition)
{
SpeculateWhicheverInt52Operand op1(this, node->child1());
SpeculateWhicheverInt52Operand op2(this, node->child2(), op1);
GPRTemporary result(this, Reuse, op1, op2);
m_jit.compare64(condition, op1.gpr(), op2.gpr(), result.gpr());
// If we add a DataFormatBool, we should use it here.
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), m_currentNode, DataFormatJSBoolean);
}
void SpeculativeJIT::compilePeepHoleInt52Branch(Node* node, Node* branchNode, JITCompiler::RelationalCondition condition)
{
BasicBlock* taken = branchNode->branchData()->taken.block;
BasicBlock* notTaken = branchNode->branchData()->notTaken.block;
// The branch instruction will branch to the taken block.
// If taken is next, switch taken with notTaken & invert the branch condition so we can fall through.
if (taken == nextBlock()) {
condition = JITCompiler::invert(condition);
BasicBlock* tmp = taken;
taken = notTaken;
notTaken = tmp;
}
SpeculateWhicheverInt52Operand op1(this, node->child1());
SpeculateWhicheverInt52Operand op2(this, node->child2(), op1);
branch64(condition, op1.gpr(), op2.gpr(), taken);
jump(notTaken);
}
void SpeculativeJIT::compileDoubleCompare(Node* node, MacroAssembler::DoubleCondition condition)
{
SpeculateDoubleOperand op1(this, node->child1());
SpeculateDoubleOperand op2(this, node->child2());
GPRTemporary result(this);
m_jit.move(TrustedImm32(ValueTrue), result.gpr());
MacroAssembler::Jump trueCase = m_jit.branchDouble(condition, op1.fpr(), op2.fpr());
m_jit.xor64(TrustedImm32(true), result.gpr());
trueCase.link(&m_jit);
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
}
void SpeculativeJIT::compileObjectOrOtherLogicalNot(Edge nodeUse)
{
JSValueOperand value(this, nodeUse, ManualOperandSpeculation);
GPRTemporary result(this);
GPRReg valueGPR = value.gpr();
GPRReg resultGPR = result.gpr();
GPRTemporary structure;
GPRReg structureGPR = InvalidGPRReg;
GPRTemporary scratch;
GPRReg scratchGPR = InvalidGPRReg;
bool masqueradesAsUndefinedWatchpointValid =
masqueradesAsUndefinedWatchpointIsStillValid();
if (!masqueradesAsUndefinedWatchpointValid) {
// The masquerades as undefined case will use the structure register, so allocate it here.
// Do this at the top of the function to avoid branching around a register allocation.
GPRTemporary realStructure(this);
GPRTemporary realScratch(this);
structure.adopt(realStructure);
scratch.adopt(realScratch);
structureGPR = structure.gpr();
scratchGPR = scratch.gpr();
}
MacroAssembler::Jump notCell = m_jit.branchIfNotCell(JSValueRegs(valueGPR));
if (masqueradesAsUndefinedWatchpointValid) {
DFG_TYPE_CHECK(
JSValueRegs(valueGPR), nodeUse, (~SpecCell) | SpecObject, m_jit.branchIfNotObject(valueGPR));
} else {
DFG_TYPE_CHECK(
JSValueRegs(valueGPR), nodeUse, (~SpecCell) | SpecObject, m_jit.branchIfNotObject(valueGPR));
MacroAssembler::Jump isNotMasqueradesAsUndefined =
m_jit.branchTest8(
MacroAssembler::Zero,
MacroAssembler::Address(valueGPR, JSCell::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined));
m_jit.emitLoadStructure(valueGPR, structureGPR, scratchGPR);
speculationCheck(BadType, JSValueRegs(valueGPR), nodeUse,
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(structureGPR, Structure::globalObjectOffset()),
MacroAssembler::TrustedImmPtr(m_jit.graph().globalObjectFor(m_currentNode->origin.semantic))));
isNotMasqueradesAsUndefined.link(&m_jit);
}
m_jit.move(TrustedImm32(ValueFalse), resultGPR);
MacroAssembler::Jump done = m_jit.jump();
notCell.link(&m_jit);
if (needsTypeCheck(nodeUse, SpecCell | SpecOther)) {
m_jit.move(valueGPR, resultGPR);
m_jit.and64(MacroAssembler::TrustedImm32(~TagBitUndefined), resultGPR);
typeCheck(
JSValueRegs(valueGPR), nodeUse, SpecCell | SpecOther, m_jit.branch64(
MacroAssembler::NotEqual,
resultGPR,
MacroAssembler::TrustedImm64(ValueNull)));
}
m_jit.move(TrustedImm32(ValueTrue), resultGPR);
done.link(&m_jit);
jsValueResult(resultGPR, m_currentNode, DataFormatJSBoolean);
}
void SpeculativeJIT::compileLogicalNot(Node* node)
{
switch (node->child1().useKind()) {
case ObjectOrOtherUse: {
compileObjectOrOtherLogicalNot(node->child1());
return;
}
case Int32Use: {
SpeculateInt32Operand value(this, node->child1());
GPRTemporary result(this, Reuse, value);
m_jit.compare32(MacroAssembler::Equal, value.gpr(), MacroAssembler::TrustedImm32(0), result.gpr());
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
return;
}
case DoubleRepUse: {
SpeculateDoubleOperand value(this, node->child1());
FPRTemporary scratch(this);
GPRTemporary result(this);
m_jit.move(TrustedImm32(ValueFalse), result.gpr());
MacroAssembler::Jump nonZero = m_jit.branchDoubleNonZero(value.fpr(), scratch.fpr());
m_jit.xor32(TrustedImm32(true), result.gpr());
nonZero.link(&m_jit);
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
return;
}
case BooleanUse:
case KnownBooleanUse: {
if (!needsTypeCheck(node->child1(), SpecBoolean)) {
SpeculateBooleanOperand value(this, node->child1());
GPRTemporary result(this, Reuse, value);
m_jit.move(value.gpr(), result.gpr());
m_jit.xor64(TrustedImm32(true), result.gpr());
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
return;
}
JSValueOperand value(this, node->child1(), ManualOperandSpeculation);
GPRTemporary result(this); // FIXME: We could reuse, but on speculation fail would need recovery to restore tag (akin to add).
m_jit.move(value.gpr(), result.gpr());
m_jit.xor64(TrustedImm32(static_cast<int32_t>(ValueFalse)), result.gpr());
typeCheck(
JSValueRegs(value.gpr()), node->child1(), SpecBoolean, m_jit.branchTest64(
JITCompiler::NonZero, result.gpr(), TrustedImm32(static_cast<int32_t>(~1))));
m_jit.xor64(TrustedImm32(static_cast<int32_t>(ValueTrue)), result.gpr());
// If we add a DataFormatBool, we should use it here.
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
return;
}
case UntypedUse: {
JSValueOperand arg1(this, node->child1());
GPRTemporary result(this);
GPRReg arg1GPR = arg1.gpr();
GPRReg resultGPR = result.gpr();
FPRTemporary valueFPR(this);
FPRTemporary tempFPR(this);
bool shouldCheckMasqueradesAsUndefined = !masqueradesAsUndefinedWatchpointIsStillValid();
JSGlobalObject* globalObject = m_jit.graph().globalObjectFor(node->origin.semantic);
Optional<GPRTemporary> scratch;
GPRReg scratchGPR = InvalidGPRReg;
if (shouldCheckMasqueradesAsUndefined) {
scratch = GPRTemporary(this);
scratchGPR = scratch->gpr();
}
bool negateResult = true;
m_jit.emitConvertValueToBoolean(JSValueRegs(arg1GPR), resultGPR, scratchGPR, valueFPR.fpr(), tempFPR.fpr(), shouldCheckMasqueradesAsUndefined, globalObject, negateResult);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(resultGPR, node, DataFormatJSBoolean);
return;
}
case StringUse:
return compileStringZeroLength(node);
case StringOrOtherUse:
return compileLogicalNotStringOrOther(node);
default:
DFG_CRASH(m_jit.graph(), node, "Bad use kind");
break;
}
}
void SpeculativeJIT::emitObjectOrOtherBranch(Edge nodeUse, BasicBlock* taken, BasicBlock* notTaken)
{
JSValueOperand value(this, nodeUse, ManualOperandSpeculation);
GPRTemporary scratch(this);
GPRTemporary structure;
GPRReg valueGPR = value.gpr();
GPRReg scratchGPR = scratch.gpr();
GPRReg structureGPR = InvalidGPRReg;
if (!masqueradesAsUndefinedWatchpointIsStillValid()) {
GPRTemporary realStructure(this);
structure.adopt(realStructure);
structureGPR = structure.gpr();
}
MacroAssembler::Jump notCell = m_jit.branchIfNotCell(JSValueRegs(valueGPR));
if (masqueradesAsUndefinedWatchpointIsStillValid()) {
DFG_TYPE_CHECK(
JSValueRegs(valueGPR), nodeUse, (~SpecCell) | SpecObject, m_jit.branchIfNotObject(valueGPR));
} else {
DFG_TYPE_CHECK(
JSValueRegs(valueGPR), nodeUse, (~SpecCell) | SpecObject, m_jit.branchIfNotObject(valueGPR));
JITCompiler::Jump isNotMasqueradesAsUndefined = m_jit.branchTest8(
JITCompiler::Zero,
MacroAssembler::Address(valueGPR, JSCell::typeInfoFlagsOffset()),
TrustedImm32(MasqueradesAsUndefined));
m_jit.emitLoadStructure(valueGPR, structureGPR, scratchGPR);
speculationCheck(BadType, JSValueRegs(valueGPR), nodeUse,
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(structureGPR, Structure::globalObjectOffset()),
MacroAssembler::TrustedImmPtr(m_jit.graph().globalObjectFor(m_currentNode->origin.semantic))));
isNotMasqueradesAsUndefined.link(&m_jit);
}
jump(taken, ForceJump);
notCell.link(&m_jit);
if (needsTypeCheck(nodeUse, SpecCell | SpecOther)) {
m_jit.move(valueGPR, scratchGPR);
m_jit.and64(MacroAssembler::TrustedImm32(~TagBitUndefined), scratchGPR);
typeCheck(
JSValueRegs(valueGPR), nodeUse, SpecCell | SpecOther, m_jit.branch64(
MacroAssembler::NotEqual, scratchGPR, MacroAssembler::TrustedImm64(ValueNull)));
}
jump(notTaken);
noResult(m_currentNode);
}
void SpeculativeJIT::emitBranch(Node* node)
{
BasicBlock* taken = node->branchData()->taken.block;
BasicBlock* notTaken = node->branchData()->notTaken.block;
switch (node->child1().useKind()) {
case ObjectOrOtherUse: {
emitObjectOrOtherBranch(node->child1(), taken, notTaken);
return;
}
case Int32Use:
case DoubleRepUse: {
if (node->child1().useKind() == Int32Use) {
bool invert = false;
if (taken == nextBlock()) {
invert = true;
BasicBlock* tmp = taken;
taken = notTaken;
notTaken = tmp;
}
SpeculateInt32Operand value(this, node->child1());
branchTest32(invert ? MacroAssembler::Zero : MacroAssembler::NonZero, value.gpr(), taken);
} else {
SpeculateDoubleOperand value(this, node->child1());
FPRTemporary scratch(this);
branchDoubleNonZero(value.fpr(), scratch.fpr(), taken);
}
jump(notTaken);
noResult(node);
return;
}
case StringUse: {
emitStringBranch(node->child1(), taken, notTaken);
return;
}
case StringOrOtherUse: {
emitStringOrOtherBranch(node->child1(), taken, notTaken);
return;
}
case UntypedUse:
case BooleanUse:
case KnownBooleanUse: {
JSValueOperand value(this, node->child1(), ManualOperandSpeculation);
GPRReg valueGPR = value.gpr();
if (node->child1().useKind() == BooleanUse || node->child1().useKind() == KnownBooleanUse) {
if (!needsTypeCheck(node->child1(), SpecBoolean)) {
MacroAssembler::ResultCondition condition = MacroAssembler::NonZero;
if (taken == nextBlock()) {
condition = MacroAssembler::Zero;
BasicBlock* tmp = taken;
taken = notTaken;
notTaken = tmp;
}
branchTest32(condition, valueGPR, TrustedImm32(true), taken);
jump(notTaken);
} else {
branch64(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImm64(JSValue::encode(jsBoolean(false))), notTaken);
branch64(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImm64(JSValue::encode(jsBoolean(true))), taken);
typeCheck(JSValueRegs(valueGPR), node->child1(), SpecBoolean, m_jit.jump());
}
value.use();
} else {
GPRTemporary result(this);
FPRTemporary fprValue(this);
FPRTemporary fprTemp(this);
Optional<GPRTemporary> scratch;
GPRReg scratchGPR = InvalidGPRReg;
bool shouldCheckMasqueradesAsUndefined = !masqueradesAsUndefinedWatchpointIsStillValid();
if (shouldCheckMasqueradesAsUndefined) {
scratch = GPRTemporary(this);
scratchGPR = scratch->gpr();
}
GPRReg resultGPR = result.gpr();
FPRReg valueFPR = fprValue.fpr();
FPRReg tempFPR = fprTemp.fpr();
if (node->child1()->prediction() & SpecInt32Only) {
branch64(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImm64(JSValue::encode(jsNumber(0))), notTaken);
branch64(MacroAssembler::AboveOrEqual, valueGPR, GPRInfo::tagTypeNumberRegister, taken);
}
if (node->child1()->prediction() & SpecBoolean) {
branch64(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImm64(JSValue::encode(jsBoolean(false))), notTaken);
branch64(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImm64(JSValue::encode(jsBoolean(true))), taken);
}
value.use();
JSGlobalObject* globalObject = m_jit.graph().globalObjectFor(node->origin.semantic);
m_jit.emitConvertValueToBoolean(JSValueRegs(valueGPR), resultGPR, scratchGPR, valueFPR, tempFPR, shouldCheckMasqueradesAsUndefined, globalObject);
branchTest32(MacroAssembler::NonZero, resultGPR, taken);
jump(notTaken);
}
noResult(node, UseChildrenCalledExplicitly);
return;
}
default:
DFG_CRASH(m_jit.graph(), m_currentNode, "Bad use kind");
}
}
void SpeculativeJIT::compile(Node* node)
{
NodeType op = node->op();
#if ENABLE(DFG_REGISTER_ALLOCATION_VALIDATION)
m_jit.clearRegisterAllocationOffsets();
#endif
switch (op) {
case JSConstant:
case DoubleConstant:
case Int52Constant:
case PhantomDirectArguments:
case PhantomClonedArguments:
initConstantInfo(node);
break;
case LazyJSConstant:
compileLazyJSConstant(node);
break;
case Identity: {
speculate(node, node->child1());
switch (node->child1().useKind()) {
case DoubleRepUse:
case DoubleRepRealUse:
case DoubleRepAnyIntUse: {
SpeculateDoubleOperand op(this, node->child1());
FPRTemporary scratch(this, op);
m_jit.moveDouble(op.fpr(), scratch.fpr());
doubleResult(scratch.fpr(), node);
break;
}
case Int52RepUse: {
SpeculateInt52Operand op(this, node->child1());
GPRTemporary result(this, Reuse, op);
m_jit.move(op.gpr(), result.gpr());
int52Result(result.gpr(), node);
break;
}
default: {
JSValueOperand op(this, node->child1());
GPRTemporary result(this, Reuse, op);
m_jit.move(op.gpr(), result.gpr());
jsValueResult(result.gpr(), node);
break;
}
} // switch
break;
}
case GetLocal: {
AbstractValue& value = m_state.variables().operand(node->local());
// If the CFA is tracking this variable and it found that the variable
// cannot have been assigned, then don't attempt to proceed.
if (value.isClear()) {
m_compileOkay = false;
break;
}
switch (node->variableAccessData()->flushFormat()) {
case FlushedDouble: {
FPRTemporary result(this);
m_jit.loadDouble(JITCompiler::addressFor(node->machineLocal()), result.fpr());
VirtualRegister virtualRegister = node->virtualRegister();
m_fprs.retain(result.fpr(), virtualRegister, SpillOrderDouble);
generationInfoFromVirtualRegister(virtualRegister).initDouble(node, node->refCount(), result.fpr());
break;
}
case FlushedInt32: {
GPRTemporary result(this);
m_jit.load32(JITCompiler::payloadFor(node->machineLocal()), result.gpr());
// Like int32Result, but don't useChildren - our children are phi nodes,
// and don't represent values within this dataflow with virtual registers.
VirtualRegister virtualRegister = node->virtualRegister();
m_gprs.retain(result.gpr(), virtualRegister, SpillOrderInteger);
generationInfoFromVirtualRegister(virtualRegister).initInt32(node, node->refCount(), result.gpr());
break;
}
case FlushedInt52: {
GPRTemporary result(this);
m_jit.load64(JITCompiler::addressFor(node->machineLocal()), result.gpr());
VirtualRegister virtualRegister = node->virtualRegister();
m_gprs.retain(result.gpr(), virtualRegister, SpillOrderJS);
generationInfoFromVirtualRegister(virtualRegister).initInt52(node, node->refCount(), result.gpr());
break;
}
default:
GPRTemporary result(this);
m_jit.load64(JITCompiler::addressFor(node->machineLocal()), result.gpr());
// Like jsValueResult, but don't useChildren - our children are phi nodes,
// and don't represent values within this dataflow with virtual registers.
VirtualRegister virtualRegister = node->virtualRegister();
m_gprs.retain(result.gpr(), virtualRegister, SpillOrderJS);
DataFormat format;
if (isCellSpeculation(value.m_type))
format = DataFormatJSCell;
else if (isBooleanSpeculation(value.m_type))
format = DataFormatJSBoolean;
else
format = DataFormatJS;
generationInfoFromVirtualRegister(virtualRegister).initJSValue(node, node->refCount(), result.gpr(), format);
break;
}
break;
}
case GetLocalUnlinked: {
GPRTemporary result(this);
m_jit.load64(JITCompiler::addressFor(node->unlinkedMachineLocal()), result.gpr());
jsValueResult(result.gpr(), node);
break;
}
case MovHint: {
compileMovHint(m_currentNode);
noResult(node);
break;
}
case ZombieHint: {
recordSetLocal(m_currentNode->unlinkedLocal(), VirtualRegister(), DataFormatDead);
noResult(node);
break;
}
case ExitOK: {
noResult(node);
break;
}
case SetLocal: {
switch (node->variableAccessData()->flushFormat()) {
case FlushedDouble: {
SpeculateDoubleOperand value(this, node->child1());
m_jit.storeDouble(value.fpr(), JITCompiler::addressFor(node->machineLocal()));
noResult(node);
// Indicate that it's no longer necessary to retrieve the value of
// this bytecode variable from registers or other locations in the stack,
// but that it is stored as a double.
recordSetLocal(DataFormatDouble);
break;
}
case FlushedInt32: {
SpeculateInt32Operand value(this, node->child1());
m_jit.store32(value.gpr(), JITCompiler::payloadFor(node->machineLocal()));
noResult(node);
recordSetLocal(DataFormatInt32);
break;
}
case FlushedInt52: {
SpeculateInt52Operand value(this, node->child1());
m_jit.store64(value.gpr(), JITCompiler::addressFor(node->machineLocal()));
noResult(node);
recordSetLocal(DataFormatInt52);
break;
}
case FlushedCell: {
SpeculateCellOperand cell(this, node->child1());
GPRReg cellGPR = cell.gpr();
m_jit.store64(cellGPR, JITCompiler::addressFor(node->machineLocal()));
noResult(node);
recordSetLocal(DataFormatCell);
break;
}
case FlushedBoolean: {
SpeculateBooleanOperand boolean(this, node->child1());
m_jit.store64(boolean.gpr(), JITCompiler::addressFor(node->machineLocal()));
noResult(node);
recordSetLocal(DataFormatBoolean);
break;
}
case FlushedJSValue: {
JSValueOperand value(this, node->child1());
m_jit.store64(value.gpr(), JITCompiler::addressFor(node->machineLocal()));
noResult(node);
recordSetLocal(dataFormatFor(node->variableAccessData()->flushFormat()));
break;
}
default:
DFG_CRASH(m_jit.graph(), node, "Bad flush format");
break;
}
break;
}
case SetArgument:
// This is a no-op; it just marks the fact that the argument is being used.
// But it may be profitable to use this as a hook to run speculation checks
// on arguments, thereby allowing us to trivially eliminate such checks if
// the argument is not used.
recordSetLocal(dataFormatFor(node->variableAccessData()->flushFormat()));
break;
case BitAnd:
case BitOr:
case BitXor:
compileBitwiseOp(node);
break;
case BitRShift:
case BitLShift:
case BitURShift:
compileShiftOp(node);
break;
case UInt32ToNumber: {
compileUInt32ToNumber(node);
break;
}
case DoubleAsInt32: {
compileDoubleAsInt32(node);
break;
}
case ValueToInt32: {
compileValueToInt32(node);
break;
}
case DoubleRep: {
compileDoubleRep(node);
break;
}
case ValueRep: {
compileValueRep(node);
break;
}
case Int52Rep: {
switch (node->child1().useKind()) {
case Int32Use: {
SpeculateInt32Operand operand(this, node->child1());
GPRTemporary result(this, Reuse, operand);
m_jit.signExtend32ToPtr(operand.gpr(), result.gpr());
strictInt52Result(result.gpr(), node);
break;
}
case AnyIntUse: {
GPRTemporary result(this);
GPRReg resultGPR = result.gpr();
convertAnyInt(node->child1(), resultGPR);
strictInt52Result(resultGPR, node);
break;
}
case DoubleRepAnyIntUse: {
SpeculateDoubleOperand value(this, node->child1());
FPRReg valueFPR = value.fpr();
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
callOperation(operationConvertDoubleToInt52, resultGPR, valueFPR);
DFG_TYPE_CHECK_WITH_EXIT_KIND(Int52Overflow,
JSValueRegs(), node->child1(), SpecAnyIntAsDouble,
m_jit.branch64(
JITCompiler::Equal, resultGPR,
JITCompiler::TrustedImm64(JSValue::notInt52)));
strictInt52Result(resultGPR, node);
break;
}
default:
DFG_CRASH(m_jit.graph(), node, "Bad use kind");
}
break;
}
case ValueAdd:
compileValueAdd(node);
break;
case StrCat: {
JSValueOperand op1(this, node->child1(), ManualOperandSpeculation);
JSValueOperand op2(this, node->child2(), ManualOperandSpeculation);
JSValueOperand op3(this, node->child3(), ManualOperandSpeculation);
GPRReg op1GPR = op1.gpr();
GPRReg op2GPR = op2.gpr();
GPRReg op3GPR;
if (node->child3())
op3GPR = op3.gpr();
else
op3GPR = InvalidGPRReg;
flushRegisters();
GPRFlushedCallResult result(this);
if (node->child3())
callOperation(operationStrCat3, result.gpr(), op1GPR, op2GPR, op3GPR);
else
callOperation(operationStrCat2, result.gpr(), op1GPR, op2GPR);
m_jit.exceptionCheck();
cellResult(result.gpr(), node);
break;
}
case ArithAdd:
compileArithAdd(node);
break;
case ArithClz32:
compileArithClz32(node);
break;
case MakeRope:
compileMakeRope(node);
break;
case ArithSub:
compileArithSub(node);
break;
case ArithNegate:
compileArithNegate(node);
break;
case ArithMul:
compileArithMul(node);
break;
case ArithDiv: {
compileArithDiv(node);
break;
}
case ArithMod: {
compileArithMod(node);
break;
}
case ArithAbs:
compileArithAbs(node);
break;
case ArithMin:
case ArithMax: {
switch (node->binaryUseKind()) {
case Int32Use: {
SpeculateStrictInt32Operand op1(this, node->child1());
SpeculateStrictInt32Operand op2(this, node->child2());
GPRTemporary result(this, Reuse, op1);
MacroAssembler::Jump op1Less = m_jit.branch32(op == ArithMin ? MacroAssembler::LessThan : MacroAssembler::GreaterThan, op1.gpr(), op2.gpr());
m_jit.move(op2.gpr(), result.gpr());
if (op1.gpr() != result.gpr()) {
MacroAssembler::Jump done = m_jit.jump();
op1Less.link(&m_jit);
m_jit.move(op1.gpr(), result.gpr());
done.link(&m_jit);
} else
op1Less.link(&m_jit);
int32Result(result.gpr(), node);
break;
}
case DoubleRepUse: {
SpeculateDoubleOperand op1(this, node->child1());
SpeculateDoubleOperand op2(this, node->child2());
FPRTemporary result(this, op1);
FPRReg op1FPR = op1.fpr();
FPRReg op2FPR = op2.fpr();
FPRReg resultFPR = result.fpr();
MacroAssembler::JumpList done;
MacroAssembler::Jump op1Less = m_jit.branchDouble(op == ArithMin ? MacroAssembler::DoubleLessThan : MacroAssembler::DoubleGreaterThan, op1FPR, op2FPR);
// op2 is eather the lesser one or one of then is NaN
MacroAssembler::Jump op2Less = m_jit.branchDouble(op == ArithMin ? MacroAssembler::DoubleGreaterThanOrEqual : MacroAssembler::DoubleLessThanOrEqual, op1FPR, op2FPR);
// Unordered case. We don't know which of op1, op2 is NaN. Manufacture NaN by adding
// op1 + op2 and putting it into result.
m_jit.addDouble(op1FPR, op2FPR, resultFPR);
done.append(m_jit.jump());
op2Less.link(&m_jit);
m_jit.moveDouble(op2FPR, resultFPR);
if (op1FPR != resultFPR) {
done.append(m_jit.jump());
op1Less.link(&m_jit);
m_jit.moveDouble(op1FPR, resultFPR);
} else
op1Less.link(&m_jit);
done.link(&m_jit);
doubleResult(resultFPR, node);
break;
}
default:
DFG_CRASH(m_jit.graph(), node, "Bad use kind");
break;
}
break;
}
case ArithPow:
compileArithPow(node);
break;
case ArithSqrt:
compileArithSqrt(node);
break;
case ArithFRound:
compileArithFRound(node);
break;
case ArithRandom:
compileArithRandom(node);
break;
case ArithRound:
case ArithFloor:
case ArithCeil:
case ArithTrunc:
compileArithRounding(node);
break;
case ArithSin:
compileArithSin(node);
break;
case ArithCos:
compileArithCos(node);
break;
case ArithTan:
compileArithTan(node);
break;
case ArithLog:
compileArithLog(node);
break;
case LogicalNot:
compileLogicalNot(node);
break;
case CompareLess:
if (compare(node, JITCompiler::LessThan, JITCompiler::DoubleLessThan, operationCompareLess))
return;
break;
case CompareLessEq:
if (compare(node, JITCompiler::LessThanOrEqual, JITCompiler::DoubleLessThanOrEqual, operationCompareLessEq))
return;
break;
case CompareGreater:
if (compare(node, JITCompiler::GreaterThan, JITCompiler::DoubleGreaterThan, operationCompareGreater))
return;
break;
case CompareGreaterEq:
if (compare(node, JITCompiler::GreaterThanOrEqual, JITCompiler::DoubleGreaterThanOrEqual, operationCompareGreaterEq))
return;
break;
case CompareEq:
if (compare(node, JITCompiler::Equal, JITCompiler::DoubleEqual, operationCompareEq))
return;
break;
case CompareStrictEq:
if (compileStrictEq(node))
return;
break;
case CompareEqPtr:
compileCompareEqPtr(node);
break;
case StringCharCodeAt: {
compileGetCharCodeAt(node);
break;
}
case StringCharAt: {
// Relies on StringCharAt node having same basic layout as GetByVal
compileGetByValOnString(node);
break;
}
case StringFromCharCode: {
compileFromCharCode(node);
break;
}
case CheckArray: {
checkArray(node);
break;
}
case Arrayify:
case ArrayifyToStructure: {
arrayify(node);
break;
}
case GetByVal: {
switch (node->arrayMode().type()) {
case Array::SelectUsingPredictions:
case Array::ForceExit:
DFG_CRASH(m_jit.graph(), node, "Bad array mode type");
break;
case Array::Undecided: {
SpeculateStrictInt32Operand index(this, node->child2());
GPRTemporary result(this, Reuse, index);
GPRReg indexGPR = index.gpr();
GPRReg resultGPR = result.gpr();
speculationCheck(OutOfBounds, JSValueRegs(), node,
m_jit.branch32(MacroAssembler::LessThan, indexGPR, MacroAssembler::TrustedImm32(0)));
use(node->child1());
index.use();
m_jit.move(MacroAssembler::TrustedImm64(ValueUndefined), resultGPR);
jsValueResult(resultGPR, node, UseChildrenCalledExplicitly);
break;
}
case Array::Generic: {
JSValueOperand base(this, node->child1());
JSValueOperand property(this, node->child2());
GPRReg baseGPR = base.gpr();
GPRReg propertyGPR = property.gpr();
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(operationGetByVal, result.gpr(), baseGPR, propertyGPR);
m_jit.exceptionCheck();
jsValueResult(result.gpr(), node);
break;
}
case Array::Int32:
case Array::Contiguous: {
if (node->arrayMode().isInBounds()) {
SpeculateStrictInt32Operand property(this, node->child2());
StorageOperand storage(this, node->child3());
GPRReg propertyReg = property.gpr();
GPRReg storageReg = storage.gpr();
if (!m_compileOkay)
return;
speculationCheck(OutOfBounds, JSValueRegs(), 0, m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(storageReg, Butterfly::offsetOfPublicLength())));
GPRTemporary result(this);
m_jit.load64(MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight), result.gpr());
if (node->arrayMode().isSaneChain()) {
ASSERT(node->arrayMode().type() == Array::Contiguous);
JITCompiler::Jump notHole = m_jit.branchTest64(
MacroAssembler::NonZero, result.gpr());
m_jit.move(TrustedImm64(JSValue::encode(jsUndefined())), result.gpr());
notHole.link(&m_jit);
} else {
speculationCheck(
LoadFromHole, JSValueRegs(), 0,
m_jit.branchTest64(MacroAssembler::Zero, result.gpr()));
}
jsValueResult(result.gpr(), node, node->arrayMode().type() == Array::Int32 ? DataFormatJSInt32 : DataFormatJS);
break;
}
SpeculateCellOperand base(this, node->child1());
SpeculateStrictInt32Operand property(this, node->child2());
StorageOperand storage(this, node->child3());
GPRReg baseReg = base.gpr();
GPRReg propertyReg = property.gpr();
GPRReg storageReg = storage.gpr();
if (!m_compileOkay)
return;
GPRTemporary result(this);
GPRReg resultReg = result.gpr();
MacroAssembler::JumpList slowCases;
slowCases.append(m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(storageReg, Butterfly::offsetOfPublicLength())));
m_jit.load64(MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight), resultReg);
slowCases.append(m_jit.branchTest64(MacroAssembler::Zero, resultReg));
addSlowPathGenerator(
slowPathCall(
slowCases, this, operationGetByValArrayInt,
result.gpr(), baseReg, propertyReg));
jsValueResult(resultReg, node);
break;
}
case Array::Double: {
if (node->arrayMode().isInBounds()) {
SpeculateStrictInt32Operand property(this, node->child2());
StorageOperand storage(this, node->child3());
GPRReg propertyReg = property.gpr();
GPRReg storageReg = storage.gpr();
if (!m_compileOkay)
return;
speculationCheck(OutOfBounds, JSValueRegs(), 0, m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(storageReg, Butterfly::offsetOfPublicLength())));
FPRTemporary result(this);
m_jit.loadDouble(MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight), result.fpr());
if (!node->arrayMode().isSaneChain())
speculationCheck(LoadFromHole, JSValueRegs(), 0, m_jit.branchDouble(MacroAssembler::DoubleNotEqualOrUnordered, result.fpr(), result.fpr()));
doubleResult(result.fpr(), node);
break;
}
SpeculateCellOperand base(this, node->child1());
SpeculateStrictInt32Operand property(this, node->child2());
StorageOperand storage(this, node->child3());
GPRReg baseReg = base.gpr();
GPRReg propertyReg = property.gpr();
GPRReg storageReg = storage.gpr();
if (!m_compileOkay)
return;
GPRTemporary result(this);
FPRTemporary temp(this);
GPRReg resultReg = result.gpr();
FPRReg tempReg = temp.fpr();
MacroAssembler::JumpList slowCases;
slowCases.append(m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(storageReg, Butterfly::offsetOfPublicLength())));
m_jit.loadDouble(MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight), tempReg);
slowCases.append(m_jit.branchDouble(MacroAssembler::DoubleNotEqualOrUnordered, tempReg, tempReg));
boxDouble(tempReg, resultReg);
addSlowPathGenerator(
slowPathCall(
slowCases, this, operationGetByValArrayInt,
result.gpr(), baseReg, propertyReg));
jsValueResult(resultReg, node);
break;
}
case Array::ArrayStorage:
case Array::SlowPutArrayStorage: {
if (node->arrayMode().isInBounds()) {
SpeculateStrictInt32Operand property(this, node->child2());
StorageOperand storage(this, node->child3());
GPRReg propertyReg = property.gpr();
GPRReg storageReg = storage.gpr();
if (!m_compileOkay)
return;
speculationCheck(OutOfBounds, JSValueRegs(), 0, m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(storageReg, ArrayStorage::vectorLengthOffset())));
GPRTemporary result(this);
m_jit.load64(MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), result.gpr());
speculationCheck(LoadFromHole, JSValueRegs(), 0, m_jit.branchTest64(MacroAssembler::Zero, result.gpr()));
jsValueResult(result.gpr(), node);
break;
}
SpeculateCellOperand base(this, node->child1());
SpeculateStrictInt32Operand property(this, node->child2());
StorageOperand storage(this, node->child3());
GPRReg baseReg = base.gpr();
GPRReg propertyReg = property.gpr();
GPRReg storageReg = storage.gpr();
if (!m_compileOkay)
return;
GPRTemporary result(this);
GPRReg resultReg = result.gpr();
MacroAssembler::JumpList slowCases;
slowCases.append(m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(storageReg, ArrayStorage::vectorLengthOffset())));
m_jit.load64(MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), resultReg);
slowCases.append(m_jit.branchTest64(MacroAssembler::Zero, resultReg));
addSlowPathGenerator(
slowPathCall(
slowCases, this, operationGetByValArrayInt,
result.gpr(), baseReg, propertyReg));
jsValueResult(resultReg, node);
break;
}
case Array::String:
compileGetByValOnString(node);
break;
case Array::DirectArguments:
compileGetByValOnDirectArguments(node);
break;
case Array::ScopedArguments:
compileGetByValOnScopedArguments(node);
break;
default: {
TypedArrayType type = node->arrayMode().typedArrayType();
if (isInt(type))
compileGetByValOnIntTypedArray(node, type);
else
compileGetByValOnFloatTypedArray(node, type);
} }
break;
}
case GetByValWithThis: {
JSValueOperand base(this, node->child1());
GPRReg baseGPR = base.gpr();
JSValueOperand thisValue(this, node->child2());
GPRReg thisValueGPR = thisValue.gpr();
JSValueOperand subscript(this, node->child3());
GPRReg subscriptGPR = subscript.gpr();
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
callOperation(operationGetByValWithThis, resultGPR, baseGPR, thisValueGPR, subscriptGPR);
m_jit.exceptionCheck();
jsValueResult(resultGPR, node);
break;
}
case PutByValDirect:
case PutByVal:
case PutByValAlias: {
Edge child1 = m_jit.graph().varArgChild(node, 0);
Edge child2 = m_jit.graph().varArgChild(node, 1);
Edge child3 = m_jit.graph().varArgChild(node, 2);
Edge child4 = m_jit.graph().varArgChild(node, 3);
ArrayMode arrayMode = node->arrayMode().modeForPut();
bool alreadyHandled = false;
switch (arrayMode.type()) {
case Array::SelectUsingPredictions:
case Array::ForceExit:
DFG_CRASH(m_jit.graph(), node, "Bad array mode type");
break;
case Array::Generic: {
DFG_ASSERT(m_jit.graph(), node, node->op() == PutByVal || node->op() == PutByValDirect);
JSValueOperand arg1(this, child1);
JSValueOperand arg2(this, child2);
JSValueOperand arg3(this, child3);
GPRReg arg1GPR = arg1.gpr();
GPRReg arg2GPR = arg2.gpr();
GPRReg arg3GPR = arg3.gpr();
flushRegisters();
if (node->op() == PutByValDirect)
callOperation(m_jit.isStrictModeFor(node->origin.semantic) ? operationPutByValDirectStrict : operationPutByValDirectNonStrict, arg1GPR, arg2GPR, arg3GPR);
else
callOperation(m_jit.isStrictModeFor(node->origin.semantic) ? operationPutByValStrict : operationPutByValNonStrict, arg1GPR, arg2GPR, arg3GPR);
m_jit.exceptionCheck();
noResult(node);
alreadyHandled = true;
break;
}
default:
break;
}
if (alreadyHandled)
break;
// FIXME: the base may not be necessary for some array access modes. But we have to
// keep it alive to this point, so it's likely to be in a register anyway. Likely
// no harm in locking it here.
SpeculateCellOperand base(this, child1);
SpeculateStrictInt32Operand property(this, child2);
GPRReg baseReg = base.gpr();
GPRReg propertyReg = property.gpr();
switch (arrayMode.type()) {
case Array::Int32:
case Array::Contiguous: {
JSValueOperand value(this, child3, ManualOperandSpeculation);
GPRReg valueReg = value.gpr();
if (!m_compileOkay)
return;
if (arrayMode.type() == Array::Int32) {
DFG_TYPE_CHECK(
JSValueRegs(valueReg), child3, SpecInt32Only,
m_jit.branch64(
MacroAssembler::Below, valueReg, GPRInfo::tagTypeNumberRegister));
}
StorageOperand storage(this, child4);
GPRReg storageReg = storage.gpr();
if (node->op() == PutByValAlias) {
// Store the value to the array.
GPRReg propertyReg = property.gpr();
GPRReg valueReg = value.gpr();
m_jit.store64(valueReg, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight));
noResult(node);
break;
}
GPRTemporary temporary;
GPRReg temporaryReg = temporaryRegisterForPutByVal(temporary, node);
MacroAssembler::Jump slowCase;
if (arrayMode.isInBounds()) {
speculationCheck(
OutOfBounds, JSValueRegs(), 0,
m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(storageReg, Butterfly::offsetOfPublicLength())));
} else {
MacroAssembler::Jump inBounds = m_jit.branch32(MacroAssembler::Below, propertyReg, MacroAssembler::Address(storageReg, Butterfly::offsetOfPublicLength()));
slowCase = m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(storageReg, Butterfly::offsetOfVectorLength()));
if (!arrayMode.isOutOfBounds())
speculationCheck(OutOfBounds, JSValueRegs(), 0, slowCase);
m_jit.add32(TrustedImm32(1), propertyReg, temporaryReg);
m_jit.store32(temporaryReg, MacroAssembler::Address(storageReg, Butterfly::offsetOfPublicLength()));
inBounds.link(&m_jit);
}
m_jit.store64(valueReg, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight));
base.use();
property.use();
value.use();
storage.use();
if (arrayMode.isOutOfBounds()) {
if (node->op() == PutByValDirect) {
addSlowPathGenerator(slowPathCall(
slowCase, this,
m_jit.codeBlock()->isStrictMode() ? operationPutByValDirectBeyondArrayBoundsStrict : operationPutByValDirectBeyondArrayBoundsNonStrict,
NoResult, baseReg, propertyReg, valueReg));
} else {
addSlowPathGenerator(slowPathCall(
slowCase, this,
m_jit.codeBlock()->isStrictMode() ? operationPutByValBeyondArrayBoundsStrict : operationPutByValBeyondArrayBoundsNonStrict,
NoResult, baseReg, propertyReg, valueReg));
}
}
noResult(node, UseChildrenCalledExplicitly);
break;
}
case Array::Double: {
compileDoublePutByVal(node, base, property);
break;
}
case Array::ArrayStorage:
case Array::SlowPutArrayStorage: {
JSValueOperand value(this, child3);
GPRReg valueReg = value.gpr();
if (!m_compileOkay)
return;
StorageOperand storage(this, child4);
GPRReg storageReg = storage.gpr();
if (node->op() == PutByValAlias) {
// Store the value to the array.
GPRReg propertyReg = property.gpr();
GPRReg valueReg = value.gpr();
m_jit.store64(valueReg, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
noResult(node);
break;
}
GPRTemporary temporary;
GPRReg temporaryReg = temporaryRegisterForPutByVal(temporary, node);
MacroAssembler::JumpList slowCases;
MacroAssembler::Jump beyondArrayBounds = m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(storageReg, ArrayStorage::vectorLengthOffset()));
if (!arrayMode.isOutOfBounds())
speculationCheck(OutOfBounds, JSValueRegs(), 0, beyondArrayBounds);
else
slowCases.append(beyondArrayBounds);
// Check if we're writing to a hole; if so increment m_numValuesInVector.
if (arrayMode.isInBounds()) {
speculationCheck(
StoreToHole, JSValueRegs(), 0,
m_jit.branchTest64(MacroAssembler::Zero, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]))));
} else {
MacroAssembler::Jump notHoleValue = m_jit.branchTest64(MacroAssembler::NonZero, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
if (arrayMode.isSlowPut()) {
// This is sort of strange. If we wanted to optimize this code path, we would invert
// the above branch. But it's simply not worth it since this only happens if we're
// already having a bad time.
slowCases.append(m_jit.jump());
} else {
m_jit.add32(TrustedImm32(1), MacroAssembler::Address(storageReg, ArrayStorage::numValuesInVectorOffset()));
// If we're writing to a hole we might be growing the array;
MacroAssembler::Jump lengthDoesNotNeedUpdate = m_jit.branch32(MacroAssembler::Below, propertyReg, MacroAssembler::Address(storageReg, ArrayStorage::lengthOffset()));
m_jit.add32(TrustedImm32(1), propertyReg, temporaryReg);
m_jit.store32(temporaryReg, MacroAssembler::Address(storageReg, ArrayStorage::lengthOffset()));
lengthDoesNotNeedUpdate.link(&m_jit);
}
notHoleValue.link(&m_jit);
}
// Store the value to the array.
m_jit.store64(valueReg, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
base.use();
property.use();
value.use();
storage.use();
if (!slowCases.empty()) {
if (node->op() == PutByValDirect) {
addSlowPathGenerator(slowPathCall(
slowCases, this,
m_jit.codeBlock()->isStrictMode() ? operationPutByValDirectBeyondArrayBoundsStrict : operationPutByValDirectBeyondArrayBoundsNonStrict,
NoResult, baseReg, propertyReg, valueReg));
} else {
addSlowPathGenerator(slowPathCall(
slowCases, this,
m_jit.codeBlock()->isStrictMode() ? operationPutByValBeyondArrayBoundsStrict : operationPutByValBeyondArrayBoundsNonStrict,
NoResult, baseReg, propertyReg, valueReg));
}
}
noResult(node, UseChildrenCalledExplicitly);
break;
}
default: {
TypedArrayType type = arrayMode.typedArrayType();
if (isInt(type))
compilePutByValForIntTypedArray(base.gpr(), property.gpr(), node, type);
else
compilePutByValForFloatTypedArray(base.gpr(), property.gpr(), node, type);
} }
break;
}
case RegExpExec: {
bool sample = false;
if (sample)
m_jit.incrementSuperSamplerCount();
SpeculateCellOperand globalObject(this, node->child1());
GPRReg globalObjectGPR = globalObject.gpr();
if (node->child2().useKind() == RegExpObjectUse) {
if (node->child3().useKind() == StringUse) {
SpeculateCellOperand base(this, node->child2());
SpeculateCellOperand argument(this, node->child3());
GPRReg baseGPR = base.gpr();
GPRReg argumentGPR = argument.gpr();
speculateRegExpObject(node->child2(), baseGPR);
speculateString(node->child3(), argumentGPR);
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(operationRegExpExecString, result.gpr(), globalObjectGPR, baseGPR, argumentGPR);
m_jit.exceptionCheck();
jsValueResult(result.gpr(), node);
if (sample)
m_jit.decrementSuperSamplerCount();
break;
}
SpeculateCellOperand base(this, node->child2());
JSValueOperand argument(this, node->child3());
GPRReg baseGPR = base.gpr();
GPRReg argumentGPR = argument.gpr();
speculateRegExpObject(node->child2(), baseGPR);
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(operationRegExpExec, result.gpr(), globalObjectGPR, baseGPR, argumentGPR);
m_jit.exceptionCheck();
jsValueResult(result.gpr(), node);
if (sample)
m_jit.decrementSuperSamplerCount();
break;
}
JSValueOperand base(this, node->child2());
JSValueOperand argument(this, node->child3());
GPRReg baseGPR = base.gpr();
GPRReg argumentGPR = argument.gpr();
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(operationRegExpExecGeneric, result.gpr(), globalObjectGPR, baseGPR, argumentGPR);
m_jit.exceptionCheck();
jsValueResult(result.gpr(), node);
if (sample)
m_jit.decrementSuperSamplerCount();
break;
}
case RegExpTest: {
SpeculateCellOperand globalObject(this, node->child1());
GPRReg globalObjectGPR = globalObject.gpr();
if (node->child2().useKind() == RegExpObjectUse) {
if (node->child3().useKind() == StringUse) {
SpeculateCellOperand base(this, node->child2());
SpeculateCellOperand argument(this, node->child3());
GPRReg baseGPR = base.gpr();
GPRReg argumentGPR = argument.gpr();
speculateRegExpObject(node->child2(), baseGPR);
speculateString(node->child3(), argumentGPR);
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(operationRegExpTestString, result.gpr(), globalObjectGPR, baseGPR, argumentGPR);
m_jit.exceptionCheck();
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), node);
break;
}
SpeculateCellOperand base(this, node->child2());
JSValueOperand argument(this, node->child3());
GPRReg baseGPR = base.gpr();
GPRReg argumentGPR = argument.gpr();
speculateRegExpObject(node->child2(), baseGPR);
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(operationRegExpTest, result.gpr(), globalObjectGPR, baseGPR, argumentGPR);
m_jit.exceptionCheck();
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), node);
break;
}
JSValueOperand base(this, node->child2());
JSValueOperand argument(this, node->child3());
GPRReg baseGPR = base.gpr();
GPRReg argumentGPR = argument.gpr();
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(operationRegExpTestGeneric, result.gpr(), globalObjectGPR, baseGPR, argumentGPR);
m_jit.exceptionCheck();
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
break;
}
case StringReplace:
case StringReplaceRegExp: {
bool sample = false;
if (sample)
m_jit.incrementSuperSamplerCount();
if (node->child1().useKind() == StringUse
&& node->child2().useKind() == RegExpObjectUse
&& node->child3().useKind() == StringUse) {
if (JSString* replace = node->child3()->dynamicCastConstant<JSString*>()) {
if (!replace->length()) {
SpeculateCellOperand string(this, node->child1());
SpeculateCellOperand regExp(this, node->child2());
GPRReg stringGPR = string.gpr();
GPRReg regExpGPR = regExp.gpr();
speculateString(node->child1(), stringGPR);
speculateRegExpObject(node->child2(), regExpGPR);
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(
operationStringProtoFuncReplaceRegExpEmptyStr, result.gpr(), stringGPR,
regExpGPR);
m_jit.exceptionCheck();
cellResult(result.gpr(), node);
if (sample)
m_jit.decrementSuperSamplerCount();
break;
}
}
SpeculateCellOperand string(this, node->child1());
SpeculateCellOperand regExp(this, node->child2());
SpeculateCellOperand replace(this, node->child3());
GPRReg stringGPR = string.gpr();
GPRReg regExpGPR = regExp.gpr();
GPRReg replaceGPR = replace.gpr();
speculateString(node->child1(), stringGPR);
speculateRegExpObject(node->child2(), regExpGPR);
speculateString(node->child3(), replaceGPR);
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(
operationStringProtoFuncReplaceRegExpString, result.gpr(), stringGPR, regExpGPR,
replaceGPR);
m_jit.exceptionCheck();
cellResult(result.gpr(), node);
if (sample)
m_jit.decrementSuperSamplerCount();
break;
}
// If we fixed up the edge of child2, we inserted a Check(@child2, String).
OperandSpeculationMode child2SpeculationMode = AutomaticOperandSpeculation;
if (node->child2().useKind() == StringUse)
child2SpeculationMode = ManualOperandSpeculation;
JSValueOperand string(this, node->child1());
JSValueOperand search(this, node->child2(), child2SpeculationMode);
JSValueOperand replace(this, node->child3());
GPRReg stringGPR = string.gpr();
GPRReg searchGPR = search.gpr();
GPRReg replaceGPR = replace.gpr();
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(
operationStringProtoFuncReplaceGeneric, result.gpr(), stringGPR, searchGPR,
replaceGPR);
m_jit.exceptionCheck();
cellResult(result.gpr(), node);
if (sample)
m_jit.decrementSuperSamplerCount();
break;
}
case GetRegExpObjectLastIndex: {
compileGetRegExpObjectLastIndex(node);
break;
}
case SetRegExpObjectLastIndex: {
compileSetRegExpObjectLastIndex(node);
break;
}
case RecordRegExpCachedResult: {
compileRecordRegExpCachedResult(node);
break;
}
case ArrayPush: {
ASSERT(node->arrayMode().isJSArray());
SpeculateCellOperand base(this, node->child1());
GPRTemporary storageLength(this);
GPRReg baseGPR = base.gpr();
GPRReg storageLengthGPR = storageLength.gpr();
StorageOperand storage(this, node->child3());
GPRReg storageGPR = storage.gpr();
switch (node->arrayMode().type()) {
case Array::Int32:
case Array::Contiguous: {
JSValueOperand value(this, node->child2(), ManualOperandSpeculation);
GPRReg valueGPR = value.gpr();
if (node->arrayMode().type() == Array::Int32) {
DFG_TYPE_CHECK(
JSValueRegs(valueGPR), node->child2(), SpecInt32Only,
m_jit.branch64(
MacroAssembler::Below, valueGPR, GPRInfo::tagTypeNumberRegister));
}
m_jit.load32(MacroAssembler::Address(storageGPR, Butterfly::offsetOfPublicLength()), storageLengthGPR);
MacroAssembler::Jump slowPath = m_jit.branch32(MacroAssembler::AboveOrEqual, storageLengthGPR, MacroAssembler::Address(storageGPR, Butterfly::offsetOfVectorLength()));
m_jit.store64(valueGPR, MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight));
m_jit.add32(TrustedImm32(1), storageLengthGPR);
m_jit.store32(storageLengthGPR, MacroAssembler::Address(storageGPR, Butterfly::offsetOfPublicLength()));
m_jit.or64(GPRInfo::tagTypeNumberRegister, storageLengthGPR);
addSlowPathGenerator(
slowPathCall(
slowPath, this, operationArrayPush, storageLengthGPR,
valueGPR, baseGPR));
jsValueResult(storageLengthGPR, node);
break;
}
case Array::Double: {
SpeculateDoubleOperand value(this, node->child2());
FPRReg valueFPR = value.fpr();
DFG_TYPE_CHECK(
JSValueRegs(), node->child2(), SpecDoubleReal,
m_jit.branchDouble(MacroAssembler::DoubleNotEqualOrUnordered, valueFPR, valueFPR));
m_jit.load32(MacroAssembler::Address(storageGPR, Butterfly::offsetOfPublicLength()), storageLengthGPR);
MacroAssembler::Jump slowPath = m_jit.branch32(MacroAssembler::AboveOrEqual, storageLengthGPR, MacroAssembler::Address(storageGPR, Butterfly::offsetOfVectorLength()));
m_jit.storeDouble(valueFPR, MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight));
m_jit.add32(TrustedImm32(1), storageLengthGPR);
m_jit.store32(storageLengthGPR, MacroAssembler::Address(storageGPR, Butterfly::offsetOfPublicLength()));
m_jit.or64(GPRInfo::tagTypeNumberRegister, storageLengthGPR);
addSlowPathGenerator(
slowPathCall(
slowPath, this, operationArrayPushDouble, storageLengthGPR,
valueFPR, baseGPR));
jsValueResult(storageLengthGPR, node);
break;
}
case Array::ArrayStorage: {
JSValueOperand value(this, node->child2());
GPRReg valueGPR = value.gpr();
m_jit.load32(MacroAssembler::Address(storageGPR, ArrayStorage::lengthOffset()), storageLengthGPR);
// Refuse to handle bizarre lengths.
speculationCheck(Uncountable, JSValueRegs(), 0, m_jit.branch32(MacroAssembler::Above, storageLengthGPR, TrustedImm32(0x7ffffffe)));
MacroAssembler::Jump slowPath = m_jit.branch32(MacroAssembler::AboveOrEqual, storageLengthGPR, MacroAssembler::Address(storageGPR, ArrayStorage::vectorLengthOffset()));
m_jit.store64(valueGPR, MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
m_jit.add32(TrustedImm32(1), storageLengthGPR);
m_jit.store32(storageLengthGPR, MacroAssembler::Address(storageGPR, ArrayStorage::lengthOffset()));
m_jit.add32(TrustedImm32(1), MacroAssembler::Address(storageGPR, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
m_jit.or64(GPRInfo::tagTypeNumberRegister, storageLengthGPR);
addSlowPathGenerator(
slowPathCall(
slowPath, this, operationArrayPush, NoResult, storageLengthGPR,
valueGPR, baseGPR));
jsValueResult(storageLengthGPR, node);
break;
}
default:
CRASH();
break;
}
break;
}
case ArrayPop: {
ASSERT(node->arrayMode().isJSArray());
SpeculateCellOperand base(this, node->child1());
StorageOperand storage(this, node->child2());
GPRTemporary value(this);
GPRTemporary storageLength(this);
FPRTemporary temp(this); // This is kind of lame, since we don't always need it. I'm relying on the fact that we don't have FPR pressure, especially in code that uses pop().
GPRReg baseGPR = base.gpr();
GPRReg storageGPR = storage.gpr();
GPRReg valueGPR = value.gpr();
GPRReg storageLengthGPR = storageLength.gpr();
FPRReg tempFPR = temp.fpr();
switch (node->arrayMode().type()) {
case Array::Int32:
case Array::Double:
case Array::Contiguous: {
m_jit.load32(
MacroAssembler::Address(storageGPR, Butterfly::offsetOfPublicLength()), storageLengthGPR);
MacroAssembler::Jump undefinedCase =
m_jit.branchTest32(MacroAssembler::Zero, storageLengthGPR);
m_jit.sub32(TrustedImm32(1), storageLengthGPR);
m_jit.store32(
storageLengthGPR, MacroAssembler::Address(storageGPR, Butterfly::offsetOfPublicLength()));
MacroAssembler::Jump slowCase;
if (node->arrayMode().type() == Array::Double) {
m_jit.loadDouble(
MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight),
tempFPR);
// FIXME: This would not have to be here if changing the publicLength also zeroed the values between the old
// length and the new length.
m_jit.store64(
MacroAssembler::TrustedImm64(bitwise_cast<int64_t>(PNaN)), MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight));
slowCase = m_jit.branchDouble(MacroAssembler::DoubleNotEqualOrUnordered, tempFPR, tempFPR);
boxDouble(tempFPR, valueGPR);
} else {
m_jit.load64(
MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight),
valueGPR);
// FIXME: This would not have to be here if changing the publicLength also zeroed the values between the old
// length and the new length.
m_jit.store64(
MacroAssembler::TrustedImm64((int64_t)0), MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight));
slowCase = m_jit.branchTest64(MacroAssembler::Zero, valueGPR);
}
addSlowPathGenerator(
slowPathMove(
undefinedCase, this,
MacroAssembler::TrustedImm64(JSValue::encode(jsUndefined())), valueGPR));
addSlowPathGenerator(
slowPathCall(
slowCase, this, operationArrayPopAndRecoverLength, valueGPR, baseGPR));
// We can't know for sure that the result is an int because of the slow paths. :-/
jsValueResult(valueGPR, node);
break;
}
case Array::ArrayStorage: {
m_jit.load32(MacroAssembler::Address(storageGPR, ArrayStorage::lengthOffset()), storageLengthGPR);
JITCompiler::Jump undefinedCase =
m_jit.branchTest32(MacroAssembler::Zero, storageLengthGPR);
m_jit.sub32(TrustedImm32(1), storageLengthGPR);
JITCompiler::JumpList slowCases;
slowCases.append(m_jit.branch32(MacroAssembler::AboveOrEqual, storageLengthGPR, MacroAssembler::Address(storageGPR, ArrayStorage::vectorLengthOffset())));
m_jit.load64(MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), valueGPR);
slowCases.append(m_jit.branchTest64(MacroAssembler::Zero, valueGPR));
m_jit.store32(storageLengthGPR, MacroAssembler::Address(storageGPR, ArrayStorage::lengthOffset()));
m_jit.store64(MacroAssembler::TrustedImm64((int64_t)0), MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
m_jit.sub32(MacroAssembler::TrustedImm32(1), MacroAssembler::Address(storageGPR, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
addSlowPathGenerator(
slowPathMove(
undefinedCase, this,
MacroAssembler::TrustedImm64(JSValue::encode(jsUndefined())), valueGPR));
addSlowPathGenerator(
slowPathCall(
slowCases, this, operationArrayPop, valueGPR, baseGPR));
jsValueResult(valueGPR, node);
break;
}
default:
CRASH();
break;
}
break;
}
case DFG::Jump: {
jump(node->targetBlock());
noResult(node);
break;
}
case Branch:
emitBranch(node);
break;
case Switch:
emitSwitch(node);
break;
case Return: {
ASSERT(GPRInfo::callFrameRegister != GPRInfo::regT1);
ASSERT(GPRInfo::regT1 != GPRInfo::returnValueGPR);
ASSERT(GPRInfo::returnValueGPR != GPRInfo::callFrameRegister);
// Return the result in returnValueGPR.
JSValueOperand op1(this, node->child1());
m_jit.move(op1.gpr(), GPRInfo::returnValueGPR);
m_jit.emitRestoreCalleeSaves();
m_jit.emitFunctionEpilogue();
m_jit.ret();
noResult(node);
break;
}
case Throw:
case ThrowReferenceError: {
// We expect that throw statements are rare and are intended to exit the code block
// anyway, so we just OSR back to the old JIT for now.
terminateSpeculativeExecution(Uncountable, JSValueRegs(), 0);
break;
}
case BooleanToNumber: {
switch (node->child1().useKind()) {
case BooleanUse: {
JSValueOperand value(this, node->child1(), ManualOperandSpeculation);
GPRTemporary result(this); // FIXME: We could reuse, but on speculation fail would need recovery to restore tag (akin to add).
m_jit.move(value.gpr(), result.gpr());
m_jit.xor64(TrustedImm32(static_cast<int32_t>(ValueFalse)), result.gpr());
DFG_TYPE_CHECK(
JSValueRegs(value.gpr()), node->child1(), SpecBoolean, m_jit.branchTest64(
JITCompiler::NonZero, result.gpr(), TrustedImm32(static_cast<int32_t>(~1))));
int32Result(result.gpr(), node);
break;
}
case UntypedUse: {
JSValueOperand value(this, node->child1());
GPRTemporary result(this);
if (!m_interpreter.needsTypeCheck(node->child1(), SpecBoolInt32 | SpecBoolean)) {
m_jit.move(value.gpr(), result.gpr());
m_jit.and32(TrustedImm32(1), result.gpr());
int32Result(result.gpr(), node);
break;
}
m_jit.move(value.gpr(), result.gpr());
m_jit.xor64(TrustedImm32(static_cast<int32_t>(ValueFalse)), result.gpr());
JITCompiler::Jump isBoolean = m_jit.branchTest64(
JITCompiler::Zero, result.gpr(), TrustedImm32(static_cast<int32_t>(~1)));
m_jit.move(value.gpr(), result.gpr());
JITCompiler::Jump done = m_jit.jump();
isBoolean.link(&m_jit);
m_jit.or64(GPRInfo::tagTypeNumberRegister, result.gpr());
done.link(&m_jit);
jsValueResult(result.gpr(), node);
break;
}
default:
DFG_CRASH(m_jit.graph(), node, "Bad use kind");
break;
}
break;
}
case ToPrimitive: {
DFG_ASSERT(m_jit.graph(), node, node->child1().useKind() == UntypedUse);
JSValueOperand argument(this, node->child1());
GPRTemporary result(this, Reuse, argument);
GPRReg argumentGPR = argument.gpr();
GPRReg resultGPR = result.gpr();
argument.use();
MacroAssembler::Jump alreadyPrimitive = m_jit.branchIfNotCell(JSValueRegs(argumentGPR));
MacroAssembler::Jump notPrimitive = m_jit.branchIfObject(argumentGPR);
alreadyPrimitive.link(&m_jit);
m_jit.move(argumentGPR, resultGPR);
addSlowPathGenerator(
slowPathCall(notPrimitive, this, operationToPrimitive, resultGPR, argumentGPR));
jsValueResult(resultGPR, node, UseChildrenCalledExplicitly);
break;
}
case ToNumber: {
JSValueOperand argument(this, node->child1());
GPRTemporary result(this, Reuse, argument);
GPRReg argumentGPR = argument.gpr();
GPRReg resultGPR = result.gpr();
argument.use();
// We have several attempts to remove ToNumber. But ToNumber still exists.
// It means that converting non-numbers to numbers by this ToNumber is not rare.
// Instead of the slow path generator, we emit callOperation here.
if (!(m_state.forNode(node->child1()).m_type & SpecBytecodeNumber)) {
flushRegisters();
callOperation(operationToNumber, resultGPR, argumentGPR);
m_jit.exceptionCheck();
} else {
MacroAssembler::Jump notNumber = m_jit.branchIfNotNumber(argumentGPR);
m_jit.move(argumentGPR, resultGPR);
MacroAssembler::Jump done = m_jit.jump();
notNumber.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(operationToNumber, resultGPR, argumentGPR);
silentFillAllRegisters(resultGPR);
m_jit.exceptionCheck();
done.link(&m_jit);
}
jsValueResult(resultGPR, node, UseChildrenCalledExplicitly);
break;
}
case ToString:
case CallStringConstructor: {
if (node->child1().useKind() == UntypedUse) {
JSValueOperand op1(this, node->child1());
GPRReg op1GPR = op1.gpr();
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
JITCompiler::Jump done;
if (node->child1()->prediction() & SpecString) {
JITCompiler::Jump slowPath1 = m_jit.branchIfNotCell(JSValueRegs(op1GPR));
JITCompiler::Jump slowPath2 = m_jit.branchIfNotString(op1GPR);
m_jit.move(op1GPR, resultGPR);
done = m_jit.jump();
slowPath1.link(&m_jit);
slowPath2.link(&m_jit);
}
if (op == ToString)
callOperation(operationToString, resultGPR, op1GPR);
else {
ASSERT(op == CallStringConstructor);
callOperation(operationCallStringConstructor, resultGPR, op1GPR);
}
m_jit.exceptionCheck();
if (done.isSet())
done.link(&m_jit);
cellResult(resultGPR, node);
break;
}
compileToStringOrCallStringConstructorOnCell(node);
break;
}
case NewStringObject: {
compileNewStringObject(node);
break;
}
case NewArray: {
JSGlobalObject* globalObject = m_jit.graph().globalObjectFor(node->origin.semantic);
if (!globalObject->isHavingABadTime() && !hasAnyArrayStorage(node->indexingType())) {
Structure* structure = globalObject->arrayStructureForIndexingTypeDuringAllocation(node->indexingType());
DFG_ASSERT(m_jit.graph(), node, structure->indexingType() == node->indexingType());
ASSERT(
hasUndecided(structure->indexingType())
|| hasInt32(structure->indexingType())
|| hasDouble(structure->indexingType())
|| hasContiguous(structure->indexingType()));
unsigned numElements = node->numChildren();
GPRTemporary result(this);
GPRTemporary storage(this);
GPRReg resultGPR = result.gpr();
GPRReg storageGPR = storage.gpr();
emitAllocateRawObject(resultGPR, structure, storageGPR, numElements, numElements);
// At this point, one way or another, resultGPR and storageGPR have pointers to
// the JSArray and the Butterfly, respectively.
ASSERT(!hasUndecided(structure->indexingType()) || !node->numChildren());
for (unsigned operandIdx = 0; operandIdx < node->numChildren(); ++operandIdx) {
Edge use = m_jit.graph().m_varArgChildren[node->firstChild() + operandIdx];
switch (node->indexingType()) {
case ALL_BLANK_INDEXING_TYPES:
case ALL_UNDECIDED_INDEXING_TYPES:
CRASH();
break;
case ALL_DOUBLE_INDEXING_TYPES: {
SpeculateDoubleOperand operand(this, use);
FPRReg opFPR = operand.fpr();
DFG_TYPE_CHECK(
JSValueRegs(), use, SpecDoubleReal,
m_jit.branchDouble(
MacroAssembler::DoubleNotEqualOrUnordered, opFPR, opFPR));
m_jit.storeDouble(opFPR, MacroAssembler::Address(storageGPR, sizeof(double) * operandIdx));
break;
}
case ALL_INT32_INDEXING_TYPES:
case ALL_CONTIGUOUS_INDEXING_TYPES: {
JSValueOperand operand(this, use, ManualOperandSpeculation);
GPRReg opGPR = operand.gpr();
if (hasInt32(node->indexingType())) {
DFG_TYPE_CHECK(
JSValueRegs(opGPR), use, SpecInt32Only,
m_jit.branch64(
MacroAssembler::Below, opGPR, GPRInfo::tagTypeNumberRegister));
}
m_jit.store64(opGPR, MacroAssembler::Address(storageGPR, sizeof(JSValue) * operandIdx));
break;
}
default:
CRASH();
break;
}
}
// Yuck, we should *really* have a way of also returning the storageGPR. But
// that's the least of what's wrong with this code. We really shouldn't be
// allocating the array after having computed - and probably spilled to the
// stack - all of the things that will go into the array. The solution to that
// bigger problem will also likely fix the redundancy in reloading the storage
// pointer that we currently have.
cellResult(resultGPR, node);
break;
}
if (!node->numChildren()) {
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(operationNewEmptyArray, result.gpr(), globalObject->arrayStructureForIndexingTypeDuringAllocation(node->indexingType()));
m_jit.exceptionCheck();
cellResult(result.gpr(), node);
break;
}
size_t scratchSize = sizeof(EncodedJSValue) * node->numChildren();
ScratchBuffer* scratchBuffer = m_jit.vm()->scratchBufferForSize(scratchSize);
EncodedJSValue* buffer = scratchBuffer ? static_cast<EncodedJSValue*>(scratchBuffer->dataBuffer()) : 0;
for (unsigned operandIdx = 0; operandIdx < node->numChildren(); ++operandIdx) {
// Need to perform the speculations that this node promises to perform. If we're
// emitting code here and the indexing type is not array storage then there is
// probably something hilarious going on and we're already failing at all the
// things, but at least we're going to be sound.
Edge use = m_jit.graph().m_varArgChildren[node->firstChild() + operandIdx];
switch (node->indexingType()) {
case ALL_BLANK_INDEXING_TYPES:
case ALL_UNDECIDED_INDEXING_TYPES:
CRASH();
break;
case ALL_DOUBLE_INDEXING_TYPES: {
SpeculateDoubleOperand operand(this, use);
GPRTemporary scratch(this);
FPRReg opFPR = operand.fpr();
GPRReg scratchGPR = scratch.gpr();
DFG_TYPE_CHECK(
JSValueRegs(), use, SpecDoubleReal,
m_jit.branchDouble(
MacroAssembler::DoubleNotEqualOrUnordered, opFPR, opFPR));
m_jit.boxDouble(opFPR, scratchGPR);
m_jit.store64(scratchGPR, buffer + operandIdx);
break;
}
case ALL_INT32_INDEXING_TYPES: {
JSValueOperand operand(this, use, ManualOperandSpeculation);
GPRReg opGPR = operand.gpr();
if (hasInt32(node->indexingType())) {
DFG_TYPE_CHECK(
JSValueRegs(opGPR), use, SpecInt32Only,
m_jit.branch64(
MacroAssembler::Below, opGPR, GPRInfo::tagTypeNumberRegister));
}
m_jit.store64(opGPR, buffer + operandIdx);
break;
}
case ALL_CONTIGUOUS_INDEXING_TYPES:
case ALL_ARRAY_STORAGE_INDEXING_TYPES: {
JSValueOperand operand(this, use);
GPRReg opGPR = operand.gpr();
m_jit.store64(opGPR, buffer + operandIdx);
operand.use();
break;
}
default:
CRASH();
break;
}
}
switch (node->indexingType()) {
case ALL_DOUBLE_INDEXING_TYPES:
case ALL_INT32_INDEXING_TYPES:
useChildren(node);
break;
default:
break;
}
flushRegisters();
if (scratchSize) {
GPRTemporary scratch(this);
// Tell GC mark phase how much of the scratch buffer is active during call.
m_jit.move(TrustedImmPtr(scratchBuffer->activeLengthPtr()), scratch.gpr());
m_jit.storePtr(TrustedImmPtr(scratchSize), scratch.gpr());
}
GPRFlushedCallResult result(this);
callOperation(
operationNewArray, result.gpr(), globalObject->arrayStructureForIndexingTypeDuringAllocation(node->indexingType()),
static_cast<void*>(buffer), node->numChildren());
m_jit.exceptionCheck();
if (scratchSize) {
GPRTemporary scratch(this);
m_jit.move(TrustedImmPtr(scratchBuffer->activeLengthPtr()), scratch.gpr());
m_jit.storePtr(TrustedImmPtr(0), scratch.gpr());
}
cellResult(result.gpr(), node, UseChildrenCalledExplicitly);
break;
}
case NewArrayWithSize: {
JSGlobalObject* globalObject = m_jit.graph().globalObjectFor(node->origin.semantic);
if (!globalObject->isHavingABadTime() && !hasAnyArrayStorage(node->indexingType())) {
SpeculateStrictInt32Operand size(this, node->child1());
GPRTemporary result(this);
GPRReg sizeGPR = size.gpr();
GPRReg resultGPR = result.gpr();
compileAllocateNewArrayWithSize(globalObject, resultGPR, sizeGPR, node->indexingType());
cellResult(resultGPR, node);
break;
}
SpeculateStrictInt32Operand size(this, node->child1());
GPRReg sizeGPR = size.gpr();
flushRegisters();
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
GPRReg structureGPR = selectScratchGPR(sizeGPR);
MacroAssembler::Jump bigLength = m_jit.branch32(MacroAssembler::AboveOrEqual, sizeGPR, TrustedImm32(MIN_ARRAY_STORAGE_CONSTRUCTION_LENGTH));
m_jit.move(TrustedImmPtr(globalObject->arrayStructureForIndexingTypeDuringAllocation(node->indexingType())), structureGPR);
MacroAssembler::Jump done = m_jit.jump();
bigLength.link(&m_jit);
m_jit.move(TrustedImmPtr(globalObject->arrayStructureForIndexingTypeDuringAllocation(ArrayWithArrayStorage)), structureGPR);
done.link(&m_jit);
callOperation(operationNewArrayWithSize, resultGPR, structureGPR, sizeGPR, nullptr);
m_jit.exceptionCheck();
cellResult(resultGPR, node);
break;
}
case NewArrayBuffer: {
JSGlobalObject* globalObject = m_jit.graph().globalObjectFor(node->origin.semantic);
IndexingType indexingType = node->indexingType();
if (!globalObject->isHavingABadTime() && !hasAnyArrayStorage(indexingType)) {
unsigned numElements = node->numConstants();
GPRTemporary result(this);
GPRTemporary storage(this);
GPRReg resultGPR = result.gpr();
GPRReg storageGPR = storage.gpr();
emitAllocateRawObject(resultGPR, globalObject->arrayStructureForIndexingTypeDuringAllocation(indexingType), storageGPR, numElements, numElements);
DFG_ASSERT(m_jit.graph(), node, indexingType & IsArray);
JSValue* data = m_jit.codeBlock()->constantBuffer(node->startConstant());
if (indexingType == ArrayWithDouble) {
for (unsigned index = 0; index < node->numConstants(); ++index) {
double value = data[index].asNumber();
m_jit.store64(
Imm64(bitwise_cast<int64_t>(value)),
MacroAssembler::Address(storageGPR, sizeof(double) * index));
}
} else {
for (unsigned index = 0; index < node->numConstants(); ++index) {
m_jit.store64(
Imm64(JSValue::encode(data[index])),
MacroAssembler::Address(storageGPR, sizeof(JSValue) * index));
}
}
cellResult(resultGPR, node);
break;
}
flushRegisters();
GPRFlushedCallResult result(this);
callOperation(operationNewArrayBuffer, result.gpr(), globalObject->arrayStructureForIndexingTypeDuringAllocation(node->indexingType()), node->startConstant(), node->numConstants());
m_jit.exceptionCheck();
cellResult(result.gpr(), node);
break;
}
case NewTypedArray: {
switch (node->child1().useKind()) {
case Int32Use:
compileNewTypedArray(node);
break;
case UntypedUse: {
JSValueOperand argument(this, node->child1());
GPRReg argumentGPR = argument.gpr();
flushRegisters();
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
JSGlobalObject* globalObject = m_jit.graph().globalObjectFor(node->origin.semantic);
callOperation(
operationNewTypedArrayWithOneArgumentForType(node->typedArrayType()),
resultGPR, globalObject->typedArrayStructureConcurrently(node->typedArrayType()),
argumentGPR);
m_jit.exceptionCheck();
cellResult(resultGPR, node);
break;
}
default:
DFG_CRASH(m_jit.graph(), node, "Bad use kind");
break;
}
break;
}
case NewRegexp: {
flushRegisters();
GPRFlushedCallResult result(this);
RegExp* regexp = node->castOperand<RegExp*>();
callOperation(operationNewRegexp, result.gpr(), regexp);
m_jit.exceptionCheck();
cellResult(result.gpr(), node);
break;
}
case CallObjectConstructor: {
compileCallObjectConstructor(node);
break;
}
case ToThis: {
ASSERT(node->child1().useKind() == UntypedUse);
JSValueOperand thisValue(this, node->child1());
GPRTemporary temp(this);
GPRReg thisValueGPR = thisValue.gpr();
GPRReg tempGPR = temp.gpr();
MacroAssembler::JumpList slowCases;
slowCases.append(m_jit.branchIfNotCell(JSValueRegs(thisValueGPR)));
slowCases.append(
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(thisValueGPR, JSCell::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(OverridesToThis)));
m_jit.move(thisValueGPR, tempGPR);
J_JITOperation_EJ function;
if (m_jit.graph().executableFor(node->origin.semantic)->isStrictMode())
function = operationToThisStrict;
else
function = operationToThis;
addSlowPathGenerator(
slowPathCall(slowCases, this, function, tempGPR, thisValueGPR));
jsValueResult(tempGPR, node);
break;
}
case CreateThis: {
// Note that there is not so much profit to speculate here. The only things we
// speculate on are (1) that it's a cell, since that eliminates cell checks
// later if the proto is reused, and (2) if we have a FinalObject prediction
// then we speculate because we want to get recompiled if it isn't (since
// otherwise we'd start taking slow path a lot).
SpeculateCellOperand callee(this, node->child1());
GPRTemporary result(this);
GPRTemporary allocator(this);
GPRTemporary structure(this);
GPRTemporary scratch(this);
GPRReg calleeGPR = callee.gpr();
GPRReg resultGPR = result.gpr();
GPRReg allocatorGPR = allocator.gpr();
GPRReg structureGPR = structure.gpr();
GPRReg scratchGPR = scratch.gpr();
// Rare data is only used to access the allocator & structure
// We can avoid using an additional GPR this way
GPRReg rareDataGPR = structureGPR;
MacroAssembler::JumpList slowPath;
slowPath.append(m_jit.branch8(JITCompiler::NotEqual,
JITCompiler::Address(calleeGPR, JSCell::typeInfoTypeOffset()), TrustedImm32(JSFunctionType)));
m_jit.loadPtr(JITCompiler::Address(calleeGPR, JSFunction::offsetOfRareData()), rareDataGPR);
slowPath.append(m_jit.branchTestPtr(MacroAssembler::Zero, rareDataGPR));
m_jit.loadPtr(JITCompiler::Address(rareDataGPR, FunctionRareData::offsetOfObjectAllocationProfile() + ObjectAllocationProfile::offsetOfAllocator()), allocatorGPR);
m_jit.loadPtr(JITCompiler::Address(rareDataGPR, FunctionRareData::offsetOfObjectAllocationProfile() + ObjectAllocationProfile::offsetOfStructure()), structureGPR);
slowPath.append(m_jit.branchTestPtr(MacroAssembler::Zero, allocatorGPR));
emitAllocateJSObject(resultGPR, nullptr, allocatorGPR, structureGPR, TrustedImmPtr(0), scratchGPR, slowPath);
addSlowPathGenerator(slowPathCall(slowPath, this, operationCreateThis, resultGPR, calleeGPR, node->inlineCapacity()));
cellResult(resultGPR, node);
break;
}
case NewObject: {
GPRTemporary result(this);
GPRTemporary allocator(this);
GPRTemporary scratch(this);
GPRReg resultGPR = result.gpr();
GPRReg allocatorGPR = allocator.gpr();
GPRReg scratchGPR = scratch.gpr();
MacroAssembler::JumpList slowPath;
Structure* structure = node->structure();
size_t allocationSize = JSFinalObject::allocationSize(structure->inlineCapacity());
MarkedAllocator* allocatorPtr = m_jit.vm()->heap.allocatorForObjectWithoutDestructor(allocationSize);
m_jit.move(TrustedImmPtr(allocatorPtr), allocatorGPR);
emitAllocateJSObject(resultGPR, allocatorPtr, allocatorGPR, TrustedImmPtr(structure), TrustedImmPtr(0), scratchGPR, slowPath);
addSlowPathGenerator(slowPathCall(slowPath, this, operationNewObject, resultGPR, structure));
cellResult(resultGPR, node);
break;
}
case GetCallee: {
GPRTemporary result(this);
m_jit.loadPtr(JITCompiler::addressFor(CallFrameSlot::callee), result.gpr());
cellResult(result.gpr(), node);
break;
}
case GetArgumentCountIncludingThis: {
GPRTemporary result(this);
m_jit.load32(JITCompiler::payloadFor(CallFrameSlot::argumentCount), result.gpr());
int32Result(result.gpr(), node);
break;
}
case GetRestLength: {
compileGetRestLength(node);
break;
}
case GetScope:
compileGetScope(node);
break;
case SkipScope:
compileSkipScope(node);
break;
case GetGlobalObject:
compileGetGlobalObject(node);
break;
case GetClosureVar: {
SpeculateCellOperand base(this, node->child1());
GPRTemporary result(this);
GPRReg baseGPR = base.gpr();
GPRReg resultGPR = result.gpr();
m_jit.load64(JITCompiler::Address(baseGPR, JSEnvironmentRecord::offsetOfVariable(node->scopeOffset())), resultGPR);
jsValueResult(resultGPR, node);
break;
}
case PutClosureVar: {
SpeculateCellOperand base(this, node->child1());
JSValueOperand value(this, node->child2());
GPRReg baseGPR = base.gpr();
GPRReg valueGPR = value.gpr();
m_jit.store64(valueGPR, JITCompiler::Address(baseGPR, JSEnvironmentRecord::offsetOfVariable(node->scopeOffset())));
noResult(node);
break;
}
case TryGetById: {
compileTryGetById(node);
break;
}
case GetById: {
// FIXME https://bugs.webkit.org/show_bug.cgi?id=161158
// dedup with SpeculativeJIT::compileTryGetById and 32-bit version of this.
switch (node->child1().useKind()) {
case CellUse: {
SpeculateCellOperand base(this, node->child1());
GPRTemporary result(this, Reuse, base);
GPRReg baseGPR = base.gpr();
GPRReg resultGPR = result.gpr();
base.use();
cachedGetById(node->origin.semantic, baseGPR, resultGPR, node->identifierNumber());
jsValueResult(resultGPR, node, UseChildrenCalledExplicitly);
break;
}
case UntypedUse: {
JSValueOperand base(this, node->child1());
GPRTemporary result(this, Reuse, base);
GPRReg baseGPR = base.gpr();
GPRReg resultGPR = result.gpr();
base.use();
JITCompiler::Jump notCell = m_jit.branchIfNotCell(JSValueRegs(baseGPR));
cachedGetById(node->origin.semantic, baseGPR, resultGPR, node->identifierNumber(), notCell);
jsValueResult(resultGPR, node, UseChildrenCalledExplicitly);
break;
}
default:
DFG_CRASH(m_jit.graph(), node, "Bad use kind");
break;
}
break;
}
case GetByIdFlush: {
if (!node->prediction()) {
terminateSpeculativeExecution(InadequateCoverage, JSValueRegs(), 0);
break;
}
switch (node->child1().useKind()) {
case CellUse: {
SpeculateCellOperand base(this, node->child1());
GPRReg baseGPR = base.gpr();
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
base.use();
flushRegisters();
cachedGetById(node->origin.semantic, baseGPR, resultGPR, node->identifierNumber(), JITCompiler::Jump(), DontSpill);
jsValueResult(resultGPR, node, UseChildrenCalledExplicitly);
break;
}
case UntypedUse: {
JSValueOperand base(this, node->child1());
GPRReg baseGPR = base.gpr();
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
base.use();
flushRegisters();
JITCompiler::Jump notCell = m_jit.branchIfNotCell(JSValueRegs(baseGPR));
cachedGetById(node->origin.semantic, baseGPR, resultGPR, node->identifierNumber(), notCell, DontSpill);
jsValueResult(resultGPR, node, UseChildrenCalledExplicitly);
break;
}
default:
DFG_CRASH(m_jit.graph(), node, "Bad use kind");
break;
}
break;
}
case GetByIdWithThis: {
JSValueOperand base(this, node->child1());
GPRReg baseGPR = base.gpr();
JSValueOperand thisValue(this, node->child2());
GPRReg thisValueGPR = thisValue.gpr();
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
callOperation(operationGetByIdWithThis, resultGPR, baseGPR, thisValueGPR, identifierUID(node->identifierNumber()));
m_jit.exceptionCheck();
jsValueResult(resultGPR, node);
break;
}
case GetArrayLength:
compileGetArrayLength(node);
break;
case DeleteById: {
compileDeleteById(node);
break;
}
case DeleteByVal: {
compileDeleteByVal(node);
break;
}
case CheckCell: {
SpeculateCellOperand cell(this, node->child1());
speculationCheck(BadCell, JSValueSource::unboxedCell(cell.gpr()), node->child1(), m_jit.branchWeakPtr(JITCompiler::NotEqual, cell.gpr(), node->cellOperand()->cell()));
noResult(node);
break;
}
case CheckNotEmpty: {
JSValueOperand operand(this, node->child1());
GPRReg gpr = operand.gpr();
speculationCheck(TDZFailure, JSValueSource(), nullptr, m_jit.branchTest64(JITCompiler::Zero, gpr));
noResult(node);
break;
}
case CheckStringIdent:
compileCheckStringIdent(node);
break;
case GetExecutable: {
SpeculateCellOperand function(this, node->child1());
GPRTemporary result(this, Reuse, function);
GPRReg functionGPR = function.gpr();
GPRReg resultGPR = result.gpr();
speculateCellType(node->child1(), functionGPR, SpecFunction, JSFunctionType);
m_jit.loadPtr(JITCompiler::Address(functionGPR, JSFunction::offsetOfExecutable()), resultGPR);
cellResult(resultGPR, node);
break;
}
case CheckStructure: {
compileCheckStructure(node);
break;
}
case PutStructure: {
Structure* oldStructure = node->transition()->previous;
Structure* newStructure = node->transition()->next;
m_jit.jitCode()->common.notifyCompilingStructureTransition(m_jit.graph().m_plan, m_jit.codeBlock(), node);
SpeculateCellOperand base(this, node->child1());
GPRReg baseGPR = base.gpr();
ASSERT_UNUSED(oldStructure, oldStructure->indexingType() == newStructure->indexingType());
ASSERT(oldStructure->typeInfo().type() == newStructure->typeInfo().type());
ASSERT(oldStructure->typeInfo().inlineTypeFlags() == newStructure->typeInfo().inlineTypeFlags());
m_jit.store32(MacroAssembler::TrustedImm32(newStructure->id()), MacroAssembler::Address(baseGPR, JSCell::structureIDOffset()));
noResult(node);
break;
}
case AllocatePropertyStorage:
compileAllocatePropertyStorage(node);
break;
case ReallocatePropertyStorage:
compileReallocatePropertyStorage(node);
break;
case GetButterfly:
compileGetButterfly(node);
break;
case GetIndexedPropertyStorage: {
compileGetIndexedPropertyStorage(node);
break;
}
case ConstantStoragePointer: {
compileConstantStoragePointer(node);
break;
}
case GetTypedArrayByteOffset: {
compileGetTypedArrayByteOffset(node);
break;
}
case GetByOffset:
case GetGetterSetterByOffset: {
StorageOperand storage(this, node->child1());
GPRTemporary result(this, Reuse, storage);
GPRReg storageGPR = storage.gpr();
GPRReg resultGPR = result.gpr();
StorageAccessData& storageAccessData = node->storageAccessData();
m_jit.load64(JITCompiler::Address(storageGPR, offsetRelativeToBase(storageAccessData.offset)), resultGPR);
jsValueResult(resultGPR, node);
break;
}
case GetGetter: {
SpeculateCellOperand op1(this, node->child1());
GPRTemporary result(this, Reuse, op1);
GPRReg op1GPR = op1.gpr();
GPRReg resultGPR = result.gpr();
m_jit.loadPtr(JITCompiler::Address(op1GPR, GetterSetter::offsetOfGetter()), resultGPR);
cellResult(resultGPR, node);
break;
}
case GetSetter: {
SpeculateCellOperand op1(this, node->child1());
GPRTemporary result(this, Reuse, op1);
GPRReg op1GPR = op1.gpr();
GPRReg resultGPR = result.gpr();
m_jit.loadPtr(JITCompiler::Address(op1GPR, GetterSetter::offsetOfSetter()), resultGPR);
cellResult(resultGPR, node);
break;
}
case PutByOffset: {
StorageOperand storage(this, node->child1());
JSValueOperand value(this, node->child3());
GPRReg storageGPR = storage.gpr();
GPRReg valueGPR = value.gpr();
speculate(node, node->child2());
StorageAccessData& storageAccessData = node->storageAccessData();
m_jit.store64(valueGPR, JITCompiler::Address(storageGPR, offsetRelativeToBase(storageAccessData.offset)));
noResult(node);
break;
}
case PutByIdFlush: {
SpeculateCellOperand base(this, node->child1());
JSValueOperand value(this, node->child2());
GPRTemporary scratch(this);
GPRReg baseGPR = base.gpr();
GPRReg valueGPR = value.gpr();
GPRReg scratchGPR = scratch.gpr();
flushRegisters();
cachedPutById(node->origin.semantic, baseGPR, valueGPR, scratchGPR, node->identifierNumber(), NotDirect, MacroAssembler::Jump(), DontSpill);
noResult(node);
break;
}
case PutById: {
SpeculateCellOperand base(this, node->child1());
JSValueOperand value(this, node->child2());
GPRTemporary scratch(this);
GPRReg baseGPR = base.gpr();
GPRReg valueGPR = value.gpr();
GPRReg scratchGPR = scratch.gpr();
cachedPutById(node->origin.semantic, baseGPR, valueGPR, scratchGPR, node->identifierNumber(), NotDirect);
noResult(node);
break;
}
case PutByIdWithThis: {
JSValueOperand base(this, node->child1());
GPRReg baseGPR = base.gpr();
JSValueOperand thisValue(this, node->child2());
GPRReg thisValueGPR = thisValue.gpr();
JSValueOperand value(this, node->child3());
GPRReg valueGPR = value.gpr();
flushRegisters();
callOperation(m_jit.isStrictModeFor(node->origin.semantic) ? operationPutByIdWithThisStrict : operationPutByIdWithThis, NoResult, baseGPR, thisValueGPR, valueGPR, identifierUID(node->identifierNumber()));
m_jit.exceptionCheck();
noResult(node);
break;
}
case PutByValWithThis: {
JSValueOperand base(this, m_jit.graph().varArgChild(node, 0));
GPRReg baseGPR = base.gpr();
JSValueOperand thisValue(this, m_jit.graph().varArgChild(node, 1));
GPRReg thisValueGPR = thisValue.gpr();
JSValueOperand property(this, m_jit.graph().varArgChild(node, 2));
GPRReg propertyGPR = property.gpr();
JSValueOperand value(this, m_jit.graph().varArgChild(node, 3));
GPRReg valueGPR = value.gpr();
flushRegisters();
callOperation(m_jit.isStrictModeFor(node->origin.semantic) ? operationPutByValWithThisStrict : operationPutByValWithThis, NoResult, baseGPR, thisValueGPR, propertyGPR, valueGPR);
m_jit.exceptionCheck();
noResult(node);
break;
}
case PutByIdDirect: {
SpeculateCellOperand base(this, node->child1());
JSValueOperand value(this, node->child2());
GPRTemporary scratch(this);
GPRReg baseGPR = base.gpr();
GPRReg valueGPR = value.gpr();
GPRReg scratchGPR = scratch.gpr();
cachedPutById(node->origin.semantic, baseGPR, valueGPR, scratchGPR, node->identifierNumber(), Direct);
noResult(node);
break;
}
case PutGetterById:
case PutSetterById: {
compilePutAccessorById(node);
break;
}
case PutGetterSetterById: {
compilePutGetterSetterById(node);
break;
}
case PutGetterByVal:
case PutSetterByVal: {
compilePutAccessorByVal(node);
break;
}
case GetGlobalLexicalVariable:
case GetGlobalVar: {
GPRTemporary result(this);
m_jit.load64(node->variablePointer(), result.gpr());
jsValueResult(result.gpr(), node);
break;
}
case PutGlobalVariable: {
JSValueOperand value(this, node->child2());
m_jit.store64(value.gpr(), node->variablePointer());
noResult(node);
break;
}
case PutDynamicVar: {
compilePutDynamicVar(node);
break;
}
case GetDynamicVar: {
compileGetDynamicVar(node);
break;
}
case ResolveScope: {
compileResolveScope(node);
break;
}
case NotifyWrite: {
compileNotifyWrite(node);
break;
}
case CheckTypeInfoFlags: {
compileCheckTypeInfoFlags(node);
break;
}
case OverridesHasInstance: {
Node* hasInstanceValueNode = node->child2().node();
JSFunction* defaultHasInstanceFunction = jsCast<JSFunction*>(node->cellOperand()->value());
MacroAssembler::Jump notDefault;
SpeculateCellOperand base(this, node->child1());
JSValueOperand hasInstanceValue(this, node->child2());
GPRTemporary result(this);
GPRReg resultGPR = result.gpr();
GPRReg baseGPR = base.gpr();
// It would be great if constant folding handled automatically the case where we knew the hasInstance function
// was a constant. Unfortunately, the folding rule for OverridesHasInstance is in the strength reduction phase
// since it relies on OSR information. https://bugs.webkit.org/show_bug.cgi?id=154832
if (!hasInstanceValueNode->isCellConstant() || defaultHasInstanceFunction != hasInstanceValueNode->asCell()) {
GPRReg hasInstanceValueGPR = hasInstanceValue.gpr();
notDefault = m_jit.branchPtr(MacroAssembler::NotEqual, hasInstanceValueGPR, TrustedImmPtr(defaultHasInstanceFunction));
}
// Check that base 'ImplementsDefaultHasInstance'.
m_jit.test8(MacroAssembler::Zero, MacroAssembler::Address(baseGPR, JSCell::typeInfoFlagsOffset()), MacroAssembler::TrustedImm32(ImplementsDefaultHasInstance), resultGPR);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
MacroAssembler::Jump done = m_jit.jump();
if (notDefault.isSet()) {
notDefault.link(&m_jit);
moveTrueTo(resultGPR);
}
done.link(&m_jit);
jsValueResult(resultGPR, node, DataFormatJSBoolean);
break;
}
case InstanceOf: {
compileInstanceOf(node);
break;
}
case InstanceOfCustom: {
compileInstanceOfCustom(node);
break;
}
case IsEmpty: {
JSValueOperand value(this, node->child1());
GPRTemporary result(this, Reuse, value);
m_jit.comparePtr(JITCompiler::Equal, value.gpr(), TrustedImm32(JSValue::encode(JSValue())), result.gpr());
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
break;
}
case IsUndefined: {
JSValueOperand value(this, node->child1());
GPRTemporary result(this);
GPRTemporary localGlobalObject(this);
GPRTemporary remoteGlobalObject(this);
GPRTemporary scratch(this);
JITCompiler::Jump isCell = m_jit.branchIfCell(value.jsValueRegs());
m_jit.compare64(JITCompiler::Equal, value.gpr(), TrustedImm32(ValueUndefined), result.gpr());
JITCompiler::Jump done = m_jit.jump();
isCell.link(&m_jit);
JITCompiler::Jump notMasqueradesAsUndefined;
if (masqueradesAsUndefinedWatchpointIsStillValid()) {
m_jit.move(TrustedImm32(0), result.gpr());
notMasqueradesAsUndefined = m_jit.jump();
} else {
JITCompiler::Jump isMasqueradesAsUndefined = m_jit.branchTest8(
JITCompiler::NonZero,
JITCompiler::Address(value.gpr(), JSCell::typeInfoFlagsOffset()),
TrustedImm32(MasqueradesAsUndefined));
m_jit.move(TrustedImm32(0), result.gpr());
notMasqueradesAsUndefined = m_jit.jump();
isMasqueradesAsUndefined.link(&m_jit);
GPRReg localGlobalObjectGPR = localGlobalObject.gpr();
GPRReg remoteGlobalObjectGPR = remoteGlobalObject.gpr();
m_jit.move(TrustedImmPtr(m_jit.globalObjectFor(node->origin.semantic)), localGlobalObjectGPR);
m_jit.emitLoadStructure(value.gpr(), result.gpr(), scratch.gpr());
m_jit.loadPtr(JITCompiler::Address(result.gpr(), Structure::globalObjectOffset()), remoteGlobalObjectGPR);
m_jit.comparePtr(JITCompiler::Equal, localGlobalObjectGPR, remoteGlobalObjectGPR, result.gpr());
}
notMasqueradesAsUndefined.link(&m_jit);
done.link(&m_jit);
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
break;
}
case IsBoolean: {
JSValueOperand value(this, node->child1());
GPRTemporary result(this, Reuse, value);
m_jit.move(value.gpr(), result.gpr());
m_jit.xor64(JITCompiler::TrustedImm32(ValueFalse), result.gpr());
m_jit.test64(JITCompiler::Zero, result.gpr(), JITCompiler::TrustedImm32(static_cast<int32_t>(~1)), result.gpr());
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
break;
}
case IsNumber: {
JSValueOperand value(this, node->child1());
GPRTemporary result(this, Reuse, value);
m_jit.test64(JITCompiler::NonZero, value.gpr(), GPRInfo::tagTypeNumberRegister, result.gpr());
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
break;
}
case MapHash: {
JSValueOperand input(this, node->child1());
GPRTemporary temp(this);
GPRTemporary result(this);
GPRReg inputGPR = input.gpr();
GPRReg resultGPR = result.gpr();
GPRReg tempGPR = temp.gpr();
MacroAssembler::JumpList straightHash;
MacroAssembler::JumpList done;
auto isNotCell = m_jit.branchIfNotCell(inputGPR);
MacroAssembler::JumpList slowPath;
straightHash.append(m_jit.branch8(MacroAssembler::NotEqual, MacroAssembler::Address(inputGPR, JSCell::typeInfoTypeOffset()), TrustedImm32(StringType)));
m_jit.loadPtr(MacroAssembler::Address(inputGPR, JSString::offsetOfValue()), resultGPR);
slowPath.append(m_jit.branchTestPtr(MacroAssembler::Zero, resultGPR));
m_jit.load32(MacroAssembler::Address(resultGPR, StringImpl::flagsOffset()), resultGPR);
m_jit.urshift32(MacroAssembler::TrustedImm32(StringImpl::s_flagCount), resultGPR);
slowPath.append(m_jit.branchTest32(MacroAssembler::Zero, resultGPR));
done.append(m_jit.jump());
isNotCell.link(&m_jit);
straightHash.append(m_jit.branchIfNotNumber(inputGPR));
straightHash.append(m_jit.branchIfInt32(JSValueRegs(inputGPR)));
slowPath.append(m_jit.jump());
straightHash.link(&m_jit);
m_jit.move(inputGPR, resultGPR);
m_jit.wangsInt64Hash(resultGPR, tempGPR);
done.append(m_jit.jump());
slowPath.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(operationMapHash, resultGPR, JSValueRegs(inputGPR));
silentFillAllRegisters(resultGPR);
m_jit.exceptionCheck();
done.link(&m_jit);
int32Result(resultGPR, node);
break;
}
case GetMapBucket: {
SpeculateCellOperand map(this, node->child1());
JSValueOperand key(this, node->child2());
SpeculateInt32Operand hash(this, node->child3());
GPRTemporary mask(this);
GPRTemporary index(this);
GPRTemporary buffer(this);
GPRTemporary bucket(this);
GPRTemporary result(this);
GPRReg hashGPR = hash.gpr();
GPRReg mapGPR = map.gpr();
GPRReg maskGPR = mask.gpr();
GPRReg indexGPR = index.gpr();
GPRReg bufferGPR = buffer.gpr();
GPRReg bucketGPR = bucket.gpr();
GPRReg keyGPR = key.gpr();
GPRReg resultGPR = result.gpr();
if (node->child1().useKind() == MapObjectUse)
speculateMapObject(node->child1(), mapGPR);
else if (node->child1().useKind() == SetObjectUse)
speculateSetObject(node->child1(), mapGPR);
else
RELEASE_ASSERT_NOT_REACHED();
m_jit.loadPtr(MacroAssembler::Address(mapGPR, node->child1().useKind() == MapObjectUse ? JSMap::offsetOfHashMapImpl() : JSSet::offsetOfHashMapImpl()), bufferGPR);
m_jit.load32(MacroAssembler::Address(bufferGPR, HashMapImpl<HashMapBucket<HashMapBucketDataKey>>::offsetOfCapacity()), maskGPR);
m_jit.loadPtr(MacroAssembler::Address(bufferGPR, HashMapImpl<HashMapBucket<HashMapBucketDataKey>>::offsetOfBuffer()), bufferGPR);
m_jit.sub32(TrustedImm32(1), maskGPR);
m_jit.move(hashGPR, indexGPR);
MacroAssembler::Label loop = m_jit.label();
MacroAssembler::JumpList done;
MacroAssembler::JumpList slowPathCases;
MacroAssembler::JumpList loopAround;
m_jit.and32(maskGPR, indexGPR);
m_jit.loadPtr(MacroAssembler::BaseIndex(bufferGPR, indexGPR, MacroAssembler::TimesEight), bucketGPR);
m_jit.move(bucketGPR, resultGPR);
auto notPresentInTable = m_jit.branchPtr(MacroAssembler::Equal,
bucketGPR, TrustedImmPtr(HashMapImpl<HashMapBucket<HashMapBucketDataKey>>::emptyValue()));
loopAround.append(m_jit.branchPtr(MacroAssembler::Equal,
bucketGPR, TrustedImmPtr(HashMapImpl<HashMapBucket<HashMapBucketDataKey>>::deletedValue())));
m_jit.load64(MacroAssembler::Address(bucketGPR, HashMapBucket<HashMapBucketDataKey>::offsetOfKey()), bucketGPR);
// Perform Object.is()
done.append(m_jit.branch64(MacroAssembler::Equal, bucketGPR, keyGPR)); // They're definitely the same value, we found the bucket we were looking for!
auto oneIsntCell = m_jit.branchIfNotCell(JSValueRegs(bucketGPR));
// first is a cell here.
loopAround.append(m_jit.branchIfNotCell(JSValueRegs(keyGPR)));
// Both are cells here.
loopAround.append(m_jit.branch8(JITCompiler::NotEqual,
JITCompiler::Address(bucketGPR, JSCell::typeInfoTypeOffset()), TrustedImm32(StringType)));
// The first is a string here.
slowPathCases.append(m_jit.branch8(JITCompiler::Equal,
JITCompiler::Address(keyGPR, JSCell::typeInfoTypeOffset()), TrustedImm32(StringType)));
// The first is a string, but the second is not, we continue to loop around.
loopAround.append(m_jit.jump());
oneIsntCell.link(&m_jit);
// We've already done a 64-bit compare at this point, so if one is not a number, they're definitely not equal.
loopAround.append(m_jit.branchIfNotNumber(bucketGPR));
loopAround.append(m_jit.branchIfNotNumber(keyGPR));
// Both are definitely numbers. If we see a double, we go to the slow path.
slowPathCases.append(m_jit.branchIfNotInt32(bucketGPR));
slowPathCases.append(m_jit.branchIfNotInt32(keyGPR));
loopAround.link(&m_jit);
m_jit.add32(TrustedImm32(1), indexGPR);
m_jit.jump().linkTo(loop, &m_jit);
slowPathCases.link(&m_jit);
silentSpillAllRegisters(indexGPR);
if (node->child1().useKind() == MapObjectUse)
callOperation(operationJSMapFindBucket, resultGPR, mapGPR, keyGPR, hashGPR);
else
callOperation(operationJSSetFindBucket, resultGPR, mapGPR, keyGPR, hashGPR);
silentFillAllRegisters(indexGPR);
m_jit.exceptionCheck();
done.append(m_jit.jump());
notPresentInTable.link(&m_jit);
m_jit.move(TrustedImmPtr(nullptr), resultGPR);
done.link(&m_jit);
cellResult(resultGPR, node);
break;
}
case LoadFromJSMapBucket: {
SpeculateCellOperand bucket(this, node->child1());
GPRTemporary result(this);
GPRReg bucketGPR = bucket.gpr();
GPRReg resultGPR = result.gpr();
auto notBucket = m_jit.branchTestPtr(MacroAssembler::Zero, bucketGPR);
m_jit.load64(MacroAssembler::Address(bucketGPR, HashMapBucket<HashMapBucketDataKeyValue>::offsetOfValue()), resultGPR);
auto done = m_jit.jump();
notBucket.link(&m_jit);
m_jit.move(MacroAssembler::TrustedImm64(JSValue::encode(jsUndefined())), resultGPR);
done.link(&m_jit);
jsValueResult(resultGPR, node);
break;
}
case IsNonEmptyMapBucket: {
SpeculateCellOperand bucket(this, node->child1());
GPRTemporary result(this);
GPRReg bucketGPR = bucket.gpr();
GPRReg resultGPR = result.gpr();
m_jit.comparePtr(MacroAssembler::NotEqual, bucketGPR, TrustedImm32(0), resultGPR);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(resultGPR, node, DataFormatJSBoolean);
break;
}
case IsObject: {
JSValueOperand value(this, node->child1());
GPRTemporary result(this, Reuse, value);
JITCompiler::Jump isNotCell = m_jit.branchIfNotCell(value.jsValueRegs());
m_jit.compare8(JITCompiler::AboveOrEqual,
JITCompiler::Address(value.gpr(), JSCell::typeInfoTypeOffset()),
TrustedImm32(ObjectType),
result.gpr());
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
JITCompiler::Jump done = m_jit.jump();
isNotCell.link(&m_jit);
m_jit.move(TrustedImm32(ValueFalse), result.gpr());
done.link(&m_jit);
jsValueResult(result.gpr(), node, DataFormatJSBoolean);
break;
}
case IsObjectOrNull: {
compileIsObjectOrNull(node);
break;
}
case IsFunction: {
compileIsFunction(node);
break;
}
case IsCellWithType: {
compileIsCellWithType(node);
break;
}
case IsTypedArrayView: {
compileIsTypedArrayView(node);
break;
}
case TypeOf: {
compileTypeOf(node);
break;
}
case Flush:
break;
case Call:
case TailCall:
case TailCallInlinedCaller:
case Construct:
case CallVarargs:
case TailCallVarargs:
case TailCallVarargsInlinedCaller:
case CallForwardVarargs:
case ConstructVarargs:
case ConstructForwardVarargs:
case TailCallForwardVarargs:
case TailCallForwardVarargsInlinedCaller:
case CallEval:
emitCall(node);
break;
case LoadVarargs: {
LoadVarargsData* data = node->loadVarargsData();
GPRReg argumentsGPR;
{
JSValueOperand arguments(this, node->child1());
argumentsGPR = arguments.gpr();
flushRegisters();
}
callOperation(operationSizeOfVarargs, GPRInfo::returnValueGPR, argumentsGPR, data->offset);
m_jit.exceptionCheck();
lock(GPRInfo::returnValueGPR);
{
JSValueOperand arguments(this, node->child1());
argumentsGPR = arguments.gpr();
flushRegisters();
}
unlock(GPRInfo::returnValueGPR);
// FIXME: There is a chance that we will call an effectful length property twice. This is safe
// from the standpoint of the VM's integrity, but it's subtly wrong from a spec compliance
// standpoint. The best solution would be one where we can exit *into* the op_call_varargs right
// past the sizing.
// https://bugs.webkit.org/show_bug.cgi?id=141448
GPRReg argCountIncludingThisGPR =
JITCompiler::selectScratchGPR(GPRInfo::returnValueGPR, argumentsGPR);
m_jit.add32(TrustedImm32(1), GPRInfo::returnValueGPR, argCountIncludingThisGPR);
speculationCheck(
VarargsOverflow, JSValueSource(), Edge(), m_jit.branch32(
MacroAssembler::Above,
argCountIncludingThisGPR,
TrustedImm32(data->limit)));
m_jit.store32(argCountIncludingThisGPR, JITCompiler::payloadFor(data->machineCount));
callOperation(operationLoadVarargs, data->machineStart.offset(), argumentsGPR, data->offset, GPRInfo::returnValueGPR, data->mandatoryMinimum);
m_jit.exceptionCheck();
noResult(node);
break;
}
case ForwardVarargs: {
compileForwardVarargs(node);
break;
}
case CreateActivation: {
compileCreateActivation(node);
break;
}
case CreateDirectArguments: {
compileCreateDirectArguments(node);
break;
}
case GetFromArguments: {
compileGetFromArguments(node);
break;
}
case PutToArguments: {
compilePutToArguments(node);
break;
}
case CreateScopedArguments: {
compileCreateScopedArguments(node);
break;
}
case CreateClonedArguments: {
compileCreateClonedArguments(node);
break;
}
case CreateRest: {
compileCreateRest(node);
break;
}
case NewFunction:
case NewGeneratorFunction:
compileNewFunction(node);
break;
case SetFunctionName:
compileSetFunctionName(node);
break;
case In:
compileIn(node);
break;
case HasOwnProperty: {
SpeculateCellOperand object(this, node->child1());
GPRTemporary uniquedStringImpl(this);
GPRTemporary temp(this);
GPRTemporary hash(this);
GPRTemporary structureID(this);
GPRTemporary result(this);
Optional<SpeculateCellOperand> keyAsCell;
Optional<JSValueOperand> keyAsValue;
GPRReg keyGPR;
if (node->child2().useKind() == UntypedUse) {
keyAsValue = JSValueOperand(this, node->child2());
keyGPR = keyAsValue->gpr();
} else {
ASSERT(node->child2().useKind() == StringUse || node->child2().useKind() == SymbolUse);
keyAsCell = SpeculateCellOperand(this, node->child2());
keyGPR = keyAsCell->gpr();
}
GPRReg objectGPR = object.gpr();
GPRReg implGPR = uniquedStringImpl.gpr();
GPRReg tempGPR = temp.gpr();
GPRReg hashGPR = hash.gpr();
GPRReg structureIDGPR = structureID.gpr();
GPRReg resultGPR = result.gpr();
speculateObject(node->child1());
MacroAssembler::JumpList slowPath;
switch (node->child2().useKind()) {
case SymbolUse: {
speculateSymbol(node->child2(), keyGPR);
m_jit.loadPtr(MacroAssembler::Address(keyGPR, Symbol::offsetOfSymbolImpl()), implGPR);
break;
}
case StringUse: {
speculateString(node->child2(), keyGPR);
m_jit.loadPtr(MacroAssembler::Address(keyGPR, JSString::offsetOfValue()), implGPR);
slowPath.append(m_jit.branchTestPtr(MacroAssembler::Zero, implGPR));
slowPath.append(m_jit.branchTest32(
MacroAssembler::Zero, MacroAssembler::Address(implGPR, StringImpl::flagsOffset()),
MacroAssembler::TrustedImm32(StringImpl::flagIsAtomic())));
break;
}
case UntypedUse: {
slowPath.append(m_jit.branchIfNotCell(JSValueRegs(keyGPR)));
auto isNotString = m_jit.branchIfNotString(keyGPR);
m_jit.loadPtr(MacroAssembler::Address(keyGPR, JSString::offsetOfValue()), implGPR);
slowPath.append(m_jit.branchTestPtr(MacroAssembler::Zero, implGPR));
slowPath.append(m_jit.branchTest32(
MacroAssembler::Zero, MacroAssembler::Address(implGPR, StringImpl::flagsOffset()),
MacroAssembler::TrustedImm32(StringImpl::flagIsAtomic())));
auto hasUniquedImpl = m_jit.jump();
isNotString.link(&m_jit);
slowPath.append(m_jit.branchIfNotSymbol(keyGPR));
m_jit.loadPtr(MacroAssembler::Address(keyGPR, Symbol::offsetOfSymbolImpl()), implGPR);
hasUniquedImpl.link(&m_jit);
break;
}
default:
RELEASE_ASSERT_NOT_REACHED();
}
// Note that we don't test if the hash is zero here. AtomicStringImpl's can't have a zero
// hash, however, a SymbolImpl may. But, because this is a cache, we don't care. We only
// ever load the result from the cache if the cache entry matches what we are querying for.
// So we either get super lucky and use zero for the hash and somehow collide with the entity
// we're looking for, or we realize we're comparing against another entity, and go to the
// slow path anyways.
m_jit.load32(MacroAssembler::Address(implGPR, UniquedStringImpl::flagsOffset()), hashGPR);
m_jit.urshift32(MacroAssembler::TrustedImm32(StringImpl::s_flagCount), hashGPR);
m_jit.load32(MacroAssembler::Address(objectGPR, JSCell::structureIDOffset()), structureIDGPR);
m_jit.add32(structureIDGPR, hashGPR);
m_jit.and32(TrustedImm32(HasOwnPropertyCache::mask), hashGPR);
static_assert(sizeof(HasOwnPropertyCache::Entry) == 16, "Strong assumption of that here.");
m_jit.lshift32(TrustedImm32(4), hashGPR);
ASSERT(m_jit.vm()->hasOwnPropertyCache());
m_jit.move(TrustedImmPtr(m_jit.vm()->hasOwnPropertyCache()), tempGPR);
slowPath.append(m_jit.branchPtr(MacroAssembler::NotEqual,
MacroAssembler::BaseIndex(tempGPR, hashGPR, MacroAssembler::TimesOne, HasOwnPropertyCache::Entry::offsetOfImpl()), implGPR));
m_jit.load8(MacroAssembler::BaseIndex(tempGPR, hashGPR, MacroAssembler::TimesOne, HasOwnPropertyCache::Entry::offsetOfResult()), resultGPR);
m_jit.load32(MacroAssembler::BaseIndex(tempGPR, hashGPR, MacroAssembler::TimesOne, HasOwnPropertyCache::Entry::offsetOfStructureID()), tempGPR);
slowPath.append(m_jit.branch32(MacroAssembler::NotEqual, tempGPR, structureIDGPR));
auto done = m_jit.jump();
slowPath.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(operationHasOwnProperty, resultGPR, objectGPR, keyGPR);
silentFillAllRegisters(resultGPR);
m_jit.exceptionCheck();
done.link(&m_jit);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(resultGPR, node, DataFormatJSBoolean);
break;
}
case CountExecution:
m_jit.add64(TrustedImm32(1), MacroAssembler::AbsoluteAddress(node->executionCounter()->address()));
break;
case ForceOSRExit: {
terminateSpeculativeExecution(InadequateCoverage, JSValueRegs(), 0);
break;
}
case InvalidationPoint:
emitInvalidationPoint(node);
break;
case CheckWatchdogTimer: {
ASSERT(m_jit.vm()->watchdog());
GPRTemporary unused(this);
GPRReg unusedGPR = unused.gpr();
JITCompiler::Jump timerDidFire = m_jit.branchTest8(JITCompiler::NonZero,
JITCompiler::AbsoluteAddress(m_jit.vm()->watchdog()->timerDidFireAddress()));
addSlowPathGenerator(slowPathCall(timerDidFire, this, operationHandleWatchdogTimer, unusedGPR));
break;
}
case Phantom:
case Check:
DFG_NODE_DO_TO_CHILDREN(m_jit.graph(), node, speculate);
noResult(node);
break;
case PhantomLocal:
case LoopHint:
// This is a no-op.
noResult(node);
break;
case Unreachable:
unreachable(node);
break;
case StoreBarrier: {
compileStoreBarrier(node);
break;
}
case GetEnumerableLength: {
SpeculateCellOperand enumerator(this, node->child1());
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
m_jit.load32(MacroAssembler::Address(enumerator.gpr(), JSPropertyNameEnumerator::indexedLengthOffset()), resultGPR);
int32Result(resultGPR, node);
break;
}
case HasGenericProperty: {
JSValueOperand base(this, node->child1());
SpeculateCellOperand property(this, node->child2());
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
callOperation(operationHasGenericProperty, resultGPR, base.gpr(), property.gpr());
m_jit.exceptionCheck();
jsValueResult(resultGPR, node, DataFormatJSBoolean);
break;
}
case HasStructureProperty: {
JSValueOperand base(this, node->child1());
SpeculateCellOperand property(this, node->child2());
SpeculateCellOperand enumerator(this, node->child3());
GPRTemporary result(this);
GPRReg baseGPR = base.gpr();
GPRReg propertyGPR = property.gpr();
GPRReg resultGPR = result.gpr();
m_jit.load32(MacroAssembler::Address(baseGPR, JSCell::structureIDOffset()), resultGPR);
MacroAssembler::Jump wrongStructure = m_jit.branch32(MacroAssembler::NotEqual,
resultGPR,
MacroAssembler::Address(enumerator.gpr(), JSPropertyNameEnumerator::cachedStructureIDOffset()));
moveTrueTo(resultGPR);
MacroAssembler::Jump done = m_jit.jump();
done.link(&m_jit);
addSlowPathGenerator(slowPathCall(wrongStructure, this, operationHasGenericProperty, resultGPR, baseGPR, propertyGPR));
jsValueResult(resultGPR, node, DataFormatJSBoolean);
break;
}
case HasIndexedProperty: {
SpeculateCellOperand base(this, node->child1());
SpeculateStrictInt32Operand index(this, node->child2());
GPRTemporary result(this);
GPRReg baseGPR = base.gpr();
GPRReg indexGPR = index.gpr();
GPRReg resultGPR = result.gpr();
MacroAssembler::JumpList slowCases;
ArrayMode mode = node->arrayMode();
switch (mode.type()) {
case Array::Int32:
case Array::Contiguous: {
ASSERT(!!node->child3());
StorageOperand storage(this, node->child3());
GPRTemporary scratch(this);
GPRReg storageGPR = storage.gpr();
GPRReg scratchGPR = scratch.gpr();
MacroAssembler::Jump outOfBounds = m_jit.branch32(MacroAssembler::AboveOrEqual, indexGPR, MacroAssembler::Address(storageGPR, Butterfly::offsetOfPublicLength()));
if (mode.isInBounds())
speculationCheck(OutOfBounds, JSValueRegs(), 0, outOfBounds);
else
slowCases.append(outOfBounds);
m_jit.load64(MacroAssembler::BaseIndex(storageGPR, indexGPR, MacroAssembler::TimesEight), scratchGPR);
slowCases.append(m_jit.branchTest64(MacroAssembler::Zero, scratchGPR));
moveTrueTo(resultGPR);
break;
}
case Array::Double: {
ASSERT(!!node->child3());
StorageOperand storage(this, node->child3());
FPRTemporary scratch(this);
FPRReg scratchFPR = scratch.fpr();
GPRReg storageGPR = storage.gpr();
MacroAssembler::Jump outOfBounds = m_jit.branch32(MacroAssembler::AboveOrEqual, indexGPR, MacroAssembler::Address(storageGPR, Butterfly::offsetOfPublicLength()));
if (mode.isInBounds())
speculationCheck(OutOfBounds, JSValueRegs(), 0, outOfBounds);
else
slowCases.append(outOfBounds);
m_jit.loadDouble(MacroAssembler::BaseIndex(storageGPR, indexGPR, MacroAssembler::TimesEight), scratchFPR);
slowCases.append(m_jit.branchDouble(MacroAssembler::DoubleNotEqualOrUnordered, scratchFPR, scratchFPR));
moveTrueTo(resultGPR);
break;
}
case Array::ArrayStorage: {
ASSERT(!!node->child3());
StorageOperand storage(this, node->child3());
GPRTemporary scratch(this);
GPRReg storageGPR = storage.gpr();
GPRReg scratchGPR = scratch.gpr();
MacroAssembler::Jump outOfBounds = m_jit.branch32(MacroAssembler::AboveOrEqual, indexGPR, MacroAssembler::Address(storageGPR, ArrayStorage::vectorLengthOffset()));
if (mode.isInBounds())
speculationCheck(OutOfBounds, JSValueRegs(), 0, outOfBounds);
else
slowCases.append(outOfBounds);
m_jit.load64(MacroAssembler::BaseIndex(storageGPR, indexGPR, MacroAssembler::TimesEight, ArrayStorage::vectorOffset()), scratchGPR);
slowCases.append(m_jit.branchTest64(MacroAssembler::Zero, scratchGPR));
moveTrueTo(resultGPR);
break;
}
default: {
slowCases.append(m_jit.jump());
break;
}
}
addSlowPathGenerator(slowPathCall(slowCases, this, operationHasIndexedProperty, resultGPR, baseGPR, indexGPR));
jsValueResult(resultGPR, node, DataFormatJSBoolean);
break;
}
case GetDirectPname: {
Edge& baseEdge = m_jit.graph().varArgChild(node, 0);
Edge& propertyEdge = m_jit.graph().varArgChild(node, 1);
Edge& indexEdge = m_jit.graph().varArgChild(node, 2);
Edge& enumeratorEdge = m_jit.graph().varArgChild(node, 3);
SpeculateCellOperand base(this, baseEdge);
SpeculateCellOperand property(this, propertyEdge);
SpeculateStrictInt32Operand index(this, indexEdge);
SpeculateCellOperand enumerator(this, enumeratorEdge);
GPRTemporary result(this);
GPRTemporary scratch1(this);
GPRTemporary scratch2(this);
GPRReg baseGPR = base.gpr();
GPRReg propertyGPR = property.gpr();
GPRReg indexGPR = index.gpr();
GPRReg enumeratorGPR = enumerator.gpr();
GPRReg resultGPR = result.gpr();
GPRReg scratch1GPR = scratch1.gpr();
GPRReg scratch2GPR = scratch2.gpr();
MacroAssembler::JumpList slowPath;
// Check the structure
m_jit.load32(MacroAssembler::Address(baseGPR, JSCell::structureIDOffset()), scratch1GPR);
slowPath.append(
m_jit.branch32(
MacroAssembler::NotEqual,
scratch1GPR,
MacroAssembler::Address(
enumeratorGPR, JSPropertyNameEnumerator::cachedStructureIDOffset())));
// Compute the offset
// If index is less than the enumerator's cached inline storage, then it's an inline access
MacroAssembler::Jump outOfLineAccess = m_jit.branch32(MacroAssembler::AboveOrEqual,
indexGPR, MacroAssembler::Address(enumeratorGPR, JSPropertyNameEnumerator::cachedInlineCapacityOffset()));
m_jit.load64(MacroAssembler::BaseIndex(baseGPR, indexGPR, MacroAssembler::TimesEight, JSObject::offsetOfInlineStorage()), resultGPR);
MacroAssembler::Jump done = m_jit.jump();
// Otherwise it's out of line
outOfLineAccess.link(&m_jit);
m_jit.loadPtr(MacroAssembler::Address(baseGPR, JSObject::butterflyOffset()), scratch2GPR);
m_jit.move(indexGPR, scratch1GPR);
m_jit.sub32(MacroAssembler::Address(enumeratorGPR, JSPropertyNameEnumerator::cachedInlineCapacityOffset()), scratch1GPR);
m_jit.neg32(scratch1GPR);
m_jit.signExtend32ToPtr(scratch1GPR, scratch1GPR);
int32_t offsetOfFirstProperty = static_cast<int32_t>(offsetInButterfly(firstOutOfLineOffset)) * sizeof(EncodedJSValue);
m_jit.load64(MacroAssembler::BaseIndex(scratch2GPR, scratch1GPR, MacroAssembler::TimesEight, offsetOfFirstProperty), resultGPR);
done.link(&m_jit);
addSlowPathGenerator(slowPathCall(slowPath, this, operationGetByVal, resultGPR, baseGPR, propertyGPR));
jsValueResult(resultGPR, node);
break;
}
case GetPropertyEnumerator: {
SpeculateCellOperand base(this, node->child1());
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
callOperation(operationGetPropertyEnumerator, resultGPR, base.gpr());
m_jit.exceptionCheck();
cellResult(resultGPR, node);
break;
}
case GetEnumeratorStructurePname:
case GetEnumeratorGenericPname: {
SpeculateCellOperand enumerator(this, node->child1());
SpeculateStrictInt32Operand index(this, node->child2());
GPRTemporary scratch1(this);
GPRTemporary result(this);
GPRReg enumeratorGPR = enumerator.gpr();
GPRReg indexGPR = index.gpr();
GPRReg scratch1GPR = scratch1.gpr();
GPRReg resultGPR = result.gpr();
MacroAssembler::Jump inBounds = m_jit.branch32(MacroAssembler::Below, indexGPR,
MacroAssembler::Address(enumeratorGPR, (op == GetEnumeratorStructurePname)
? JSPropertyNameEnumerator::endStructurePropertyIndexOffset()
: JSPropertyNameEnumerator::endGenericPropertyIndexOffset()));
m_jit.move(MacroAssembler::TrustedImm64(JSValue::encode(jsNull())), resultGPR);
MacroAssembler::Jump done = m_jit.jump();
inBounds.link(&m_jit);
m_jit.loadPtr(MacroAssembler::Address(enumeratorGPR, JSPropertyNameEnumerator::cachedPropertyNamesVectorOffset()), scratch1GPR);
m_jit.load64(MacroAssembler::BaseIndex(scratch1GPR, indexGPR, MacroAssembler::TimesEight), resultGPR);
done.link(&m_jit);
jsValueResult(resultGPR, node);
break;
}
case ToIndexString: {
SpeculateInt32Operand index(this, node->child1());
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
callOperation(operationToIndexString, resultGPR, index.gpr());
m_jit.exceptionCheck();
cellResult(resultGPR, node);
break;
}
case ProfileType: {
JSValueOperand value(this, node->child1());
GPRTemporary scratch1(this);
GPRTemporary scratch2(this);
GPRTemporary scratch3(this);
GPRReg scratch1GPR = scratch1.gpr();
GPRReg scratch2GPR = scratch2.gpr();
GPRReg scratch3GPR = scratch3.gpr();
GPRReg valueGPR = value.gpr();
MacroAssembler::JumpList jumpToEnd;
jumpToEnd.append(m_jit.branchTest64(JITCompiler::Zero, valueGPR));
TypeLocation* cachedTypeLocation = node->typeLocation();
// Compile in a predictive type check, if possible, to see if we can skip writing to the log.
// These typechecks are inlined to match those of the 64-bit JSValue type checks.
if (cachedTypeLocation->m_lastSeenType == TypeUndefined)
jumpToEnd.append(m_jit.branch64(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImm64(JSValue::encode(jsUndefined()))));
else if (cachedTypeLocation->m_lastSeenType == TypeNull)
jumpToEnd.append(m_jit.branch64(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImm64(JSValue::encode(jsNull()))));
else if (cachedTypeLocation->m_lastSeenType == TypeBoolean) {
m_jit.move(valueGPR, scratch2GPR);
m_jit.and64(TrustedImm32(~1), scratch2GPR);
jumpToEnd.append(m_jit.branch64(MacroAssembler::Equal, scratch2GPR, MacroAssembler::TrustedImm64(ValueFalse)));
} else if (cachedTypeLocation->m_lastSeenType == TypeAnyInt)
jumpToEnd.append(m_jit.branch64(MacroAssembler::AboveOrEqual, valueGPR, GPRInfo::tagTypeNumberRegister));
else if (cachedTypeLocation->m_lastSeenType == TypeNumber)
jumpToEnd.append(m_jit.branchTest64(MacroAssembler::NonZero, valueGPR, GPRInfo::tagTypeNumberRegister));
else if (cachedTypeLocation->m_lastSeenType == TypeString) {
MacroAssembler::Jump isNotCell = m_jit.branchIfNotCell(JSValueRegs(valueGPR));
jumpToEnd.append(m_jit.branchIfString(valueGPR));
isNotCell.link(&m_jit);
}
// Load the TypeProfilerLog into Scratch2.
TypeProfilerLog* cachedTypeProfilerLog = m_jit.vm()->typeProfilerLog();
m_jit.move(TrustedImmPtr(cachedTypeProfilerLog), scratch2GPR);
// Load the next LogEntry into Scratch1.
m_jit.loadPtr(MacroAssembler::Address(scratch2GPR, TypeProfilerLog::currentLogEntryOffset()), scratch1GPR);
// Store the JSValue onto the log entry.
m_jit.store64(valueGPR, MacroAssembler::Address(scratch1GPR, TypeProfilerLog::LogEntry::valueOffset()));
// Store the structureID of the cell if valueGPR is a cell, otherwise, store 0 on the log entry.
MacroAssembler::Jump isNotCell = m_jit.branchIfNotCell(JSValueRegs(valueGPR));
m_jit.load32(MacroAssembler::Address(valueGPR, JSCell::structureIDOffset()), scratch3GPR);
m_jit.store32(scratch3GPR, MacroAssembler::Address(scratch1GPR, TypeProfilerLog::LogEntry::structureIDOffset()));
MacroAssembler::Jump skipIsCell = m_jit.jump();
isNotCell.link(&m_jit);
m_jit.store32(TrustedImm32(0), MacroAssembler::Address(scratch1GPR, TypeProfilerLog::LogEntry::structureIDOffset()));
skipIsCell.link(&m_jit);
// Store the typeLocation on the log entry.
m_jit.move(TrustedImmPtr(cachedTypeLocation), scratch3GPR);
m_jit.storePtr(scratch3GPR, MacroAssembler::Address(scratch1GPR, TypeProfilerLog::LogEntry::locationOffset()));
// Increment the current log entry.
m_jit.addPtr(TrustedImm32(sizeof(TypeProfilerLog::LogEntry)), scratch1GPR);
m_jit.storePtr(scratch1GPR, MacroAssembler::Address(scratch2GPR, TypeProfilerLog::currentLogEntryOffset()));
MacroAssembler::Jump clearLog = m_jit.branchPtr(MacroAssembler::Equal, scratch1GPR, TrustedImmPtr(cachedTypeProfilerLog->logEndPtr()));
addSlowPathGenerator(
slowPathCall(clearLog, this, operationProcessTypeProfilerLogDFG, NoResult));
jumpToEnd.link(&m_jit);
noResult(node);
break;
}
case ProfileControlFlow: {
BasicBlockLocation* basicBlockLocation = node->basicBlockLocation();
basicBlockLocation->emitExecuteCode(m_jit);
noResult(node);
break;
}
case LogShadowChickenPrologue: {
flushRegisters();
prepareForExternalCall();
m_jit.emitStoreCodeOrigin(node->origin.semantic);
GPRTemporary scratch1(this, GPRInfo::nonArgGPR0); // This must be a non-argument GPR.
GPRReg scratch1Reg = scratch1.gpr();
GPRTemporary scratch2(this);
GPRReg scratch2Reg = scratch2.gpr();
GPRTemporary shadowPacket(this);
GPRReg shadowPacketReg = shadowPacket.gpr();
m_jit.ensureShadowChickenPacket(shadowPacketReg, scratch1Reg, scratch2Reg);
SpeculateCellOperand scope(this, node->child1());
GPRReg scopeReg = scope.gpr();
m_jit.logShadowChickenProloguePacket(shadowPacketReg, scratch1Reg, scopeReg);
noResult(node);
break;
}
case LogShadowChickenTail: {
flushRegisters();
prepareForExternalCall();
CallSiteIndex callSiteIndex = m_jit.emitStoreCodeOrigin(node->origin.semantic);
GPRTemporary scratch1(this, GPRInfo::nonArgGPR0); // This must be a non-argument GPR.
GPRReg scratch1Reg = scratch1.gpr();
GPRTemporary scratch2(this);
GPRReg scratch2Reg = scratch2.gpr();
GPRTemporary shadowPacket(this);
GPRReg shadowPacketReg = shadowPacket.gpr();
m_jit.ensureShadowChickenPacket(shadowPacketReg, scratch1Reg, scratch2Reg);
JSValueOperand thisValue(this, node->child1());
JSValueRegs thisRegs = JSValueRegs(thisValue.gpr());
SpeculateCellOperand scope(this, node->child2());
GPRReg scopeReg = scope.gpr();
m_jit.logShadowChickenTailPacket(shadowPacketReg, thisRegs, scopeReg, m_jit.codeBlock(), callSiteIndex);
noResult(node);
break;
}
case MaterializeNewObject:
compileMaterializeNewObject(node);
break;
#if ENABLE(FTL_JIT)
case CheckTierUpInLoop: {
MacroAssembler::Jump callTierUp = m_jit.branchAdd32(
MacroAssembler::PositiveOrZero,
TrustedImm32(Options::ftlTierUpCounterIncrementForLoop()),
MacroAssembler::AbsoluteAddress(&m_jit.jitCode()->tierUpCounter.m_counter));
MacroAssembler::Label toNextOperation = m_jit.label();
Vector<SilentRegisterSavePlan> savePlans;
silentSpillAllRegistersImpl(false, savePlans, InvalidGPRReg);
unsigned bytecodeIndex = node->origin.semantic.bytecodeIndex;
addSlowPathGenerator([=]() {
callTierUp.link(&m_jit);
silentSpill(savePlans);
m_jit.setupArgumentsWithExecState(TrustedImm32(bytecodeIndex));
appendCall(triggerTierUpNowInLoop);
silentFill(savePlans);
m_jit.jump().linkTo(toNextOperation, &m_jit);
});
break;
}
case CheckTierUpAtReturn: {
MacroAssembler::Jump done = m_jit.branchAdd32(
MacroAssembler::Signed,
TrustedImm32(Options::ftlTierUpCounterIncrementForReturn()),
MacroAssembler::AbsoluteAddress(&m_jit.jitCode()->tierUpCounter.m_counter));
silentSpillAllRegisters(InvalidGPRReg);
m_jit.setupArgumentsExecState();
appendCall(triggerTierUpNow);
silentFillAllRegisters(InvalidGPRReg);
done.link(&m_jit);
break;
}
case CheckTierUpAndOSREnter: {
ASSERT(!node->origin.semantic.inlineCallFrame);
GPRTemporary temp(this);
GPRReg tempGPR = temp.gpr();
unsigned bytecodeIndex = node->origin.semantic.bytecodeIndex;
auto triggerIterator = m_jit.jitCode()->tierUpEntryTriggers.find(bytecodeIndex);
DFG_ASSERT(m_jit.graph(), node, triggerIterator != m_jit.jitCode()->tierUpEntryTriggers.end());
uint8_t* forceEntryTrigger = &(m_jit.jitCode()->tierUpEntryTriggers.find(bytecodeIndex)->value);
MacroAssembler::Jump forceOSREntry = m_jit.branchTest8(MacroAssembler::NonZero, MacroAssembler::AbsoluteAddress(forceEntryTrigger));
MacroAssembler::Jump overflowedCounter = m_jit.branchAdd32(
MacroAssembler::PositiveOrZero,
TrustedImm32(Options::ftlTierUpCounterIncrementForLoop()),
MacroAssembler::AbsoluteAddress(&m_jit.jitCode()->tierUpCounter.m_counter));
MacroAssembler::Label toNextOperation = m_jit.label();
Vector<SilentRegisterSavePlan> savePlans;
silentSpillAllRegistersImpl(false, savePlans, tempGPR);
unsigned streamIndex = m_stream->size();
m_jit.jitCode()->bytecodeIndexToStreamIndex.add(bytecodeIndex, streamIndex);
addSlowPathGenerator([=]() {
forceOSREntry.link(&m_jit);
overflowedCounter.link(&m_jit);
silentSpill(savePlans);
m_jit.setupArgumentsWithExecState(TrustedImm32(bytecodeIndex));
appendCallSetResult(triggerOSREntryNow, tempGPR);
if (savePlans.isEmpty())
m_jit.branchTestPtr(MacroAssembler::Zero, tempGPR).linkTo(toNextOperation, &m_jit);
else {
MacroAssembler::Jump osrEnter = m_jit.branchTestPtr(MacroAssembler::NonZero, tempGPR);
silentFill(savePlans);
m_jit.jump().linkTo(toNextOperation, &m_jit);
osrEnter.link(&m_jit);
}
m_jit.emitRestoreCalleeSaves();
m_jit.jump(tempGPR);
});
break;
}
#else // ENABLE(FTL_JIT)
case CheckTierUpInLoop:
case CheckTierUpAtReturn:
case CheckTierUpAndOSREnter:
DFG_CRASH(m_jit.graph(), node, "Unexpected tier-up node");
break;
#endif // ENABLE(FTL_JIT)
case LastNodeType:
case Phi:
case Upsilon:
case ExtractOSREntryLocal:
case CheckInBounds:
case ArithIMul:
case MultiGetByOffset:
case MultiPutByOffset:
case FiatInt52:
case CheckBadCell:
case BottomValue:
case PhantomNewObject:
case PhantomNewFunction:
case PhantomNewGeneratorFunction:
case PhantomCreateActivation:
case GetMyArgumentByVal:
case GetMyArgumentByValOutOfBounds:
case PutHint:
case CheckStructureImmediate:
case MaterializeCreateActivation:
case PutStack:
case KillStack:
case GetStack:
DFG_CRASH(m_jit.graph(), node, "Unexpected node");
break;
}
if (!m_compileOkay)
return;
if (node->hasResult() && node->mustGenerate())
use(node);
}
void SpeculativeJIT::writeBarrier(GPRReg ownerGPR, GPRReg valueGPR, Edge valueUse, GPRReg scratch1, GPRReg scratch2)
{
JITCompiler::Jump isNotCell;
if (!isKnownCell(valueUse.node()))
isNotCell = m_jit.branchIfNotCell(JSValueRegs(valueGPR));
JITCompiler::Jump ownerIsRememberedOrInEden = m_jit.jumpIfIsRememberedOrInEden(ownerGPR);
storeToWriteBarrierBuffer(ownerGPR, scratch1, scratch2);
ownerIsRememberedOrInEden.link(&m_jit);
if (!isKnownCell(valueUse.node()))
isNotCell.link(&m_jit);
}
void SpeculativeJIT::moveTrueTo(GPRReg gpr)
{
m_jit.move(TrustedImm32(ValueTrue), gpr);
}
void SpeculativeJIT::moveFalseTo(GPRReg gpr)
{
m_jit.move(TrustedImm32(ValueFalse), gpr);
}
void SpeculativeJIT::blessBoolean(GPRReg gpr)
{
m_jit.or32(TrustedImm32(ValueFalse), gpr);
}
void SpeculativeJIT::convertAnyInt(Edge valueEdge, GPRReg resultGPR)
{
JSValueOperand value(this, valueEdge, ManualOperandSpeculation);
GPRReg valueGPR = value.gpr();
JITCompiler::Jump notInt32 =
m_jit.branch64(JITCompiler::Below, valueGPR, GPRInfo::tagTypeNumberRegister);
m_jit.signExtend32ToPtr(valueGPR, resultGPR);
JITCompiler::Jump done = m_jit.jump();
notInt32.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(operationConvertBoxedDoubleToInt52, resultGPR, valueGPR);
silentFillAllRegisters(resultGPR);
DFG_TYPE_CHECK(
JSValueRegs(valueGPR), valueEdge, SpecInt32Only | SpecAnyIntAsDouble,
m_jit.branch64(
JITCompiler::Equal, resultGPR,
JITCompiler::TrustedImm64(JSValue::notInt52)));
done.link(&m_jit);
}
void SpeculativeJIT::speculateAnyInt(Edge edge)
{
if (!needsTypeCheck(edge, SpecInt32Only | SpecAnyIntAsDouble))
return;
GPRTemporary temp(this);
convertAnyInt(edge, temp.gpr());
}
void SpeculativeJIT::speculateDoubleRepAnyInt(Edge edge)
{
if (!needsTypeCheck(edge, SpecAnyIntAsDouble))
return;
SpeculateDoubleOperand value(this, edge);
FPRReg valueFPR = value.fpr();
GPRFlushedCallResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
callOperation(operationConvertDoubleToInt52, resultGPR, valueFPR);
DFG_TYPE_CHECK(
JSValueRegs(), edge, SpecAnyIntAsDouble,
m_jit.branch64(
JITCompiler::Equal, resultGPR,
JITCompiler::TrustedImm64(JSValue::notInt52)));
}
void SpeculativeJIT::compileArithRandom(Node* node)
{
JSGlobalObject* globalObject = m_jit.graph().globalObjectFor(node->origin.semantic);
GPRTemporary temp1(this);
GPRTemporary temp2(this);
GPRTemporary temp3(this);
FPRTemporary result(this);
m_jit.emitRandomThunk(globalObject, temp1.gpr(), temp2.gpr(), temp3.gpr(), result.fpr());
doubleResult(result.fpr(), node);
}
void SpeculativeJIT::compileAllocateNewArrayWithSize(JSGlobalObject* globalObject, GPRReg resultGPR, GPRReg sizeGPR, IndexingType indexingType, bool shouldConvertLargeSizeToArrayStorage)
{
GPRTemporary storage(this);
GPRTemporary scratch(this);
GPRTemporary scratch2(this);
GPRReg storageGPR = storage.gpr();
GPRReg scratchGPR = scratch.gpr();
GPRReg scratch2GPR = scratch2.gpr();
m_jit.move(TrustedImmPtr(0), storageGPR);
MacroAssembler::JumpList slowCases;
if (shouldConvertLargeSizeToArrayStorage)
slowCases.append(m_jit.branch32(MacroAssembler::AboveOrEqual, sizeGPR, TrustedImm32(MIN_ARRAY_STORAGE_CONSTRUCTION_LENGTH)));
ASSERT((1 << 3) == sizeof(JSValue));
m_jit.move(sizeGPR, scratchGPR);
m_jit.lshift32(TrustedImm32(3), scratchGPR);
m_jit.add32(TrustedImm32(sizeof(IndexingHeader)), scratchGPR, resultGPR);
m_jit.emitAllocateVariableSized(
storageGPR, m_jit.vm()->heap.subspaceForAuxiliaryData(), resultGPR, scratchGPR,
scratch2GPR, slowCases);
m_jit.addPtr(TrustedImm32(sizeof(IndexingHeader)), storageGPR);
m_jit.store32(sizeGPR, MacroAssembler::Address(storageGPR, Butterfly::offsetOfPublicLength()));
m_jit.store32(sizeGPR, MacroAssembler::Address(storageGPR, Butterfly::offsetOfVectorLength()));
if (hasDouble(indexingType))
m_jit.move(TrustedImm64(bitwise_cast<int64_t>(PNaN)), scratchGPR);
else
m_jit.move(TrustedImm64(JSValue::encode(JSValue())), scratchGPR);
m_jit.move(sizeGPR, scratch2GPR);
MacroAssembler::Jump done = m_jit.branchTest32(MacroAssembler::Zero, scratch2GPR);
MacroAssembler::Label loop = m_jit.label();
m_jit.sub32(TrustedImm32(1), scratch2GPR);
m_jit.store64(scratchGPR, MacroAssembler::BaseIndex(storageGPR, scratch2GPR, MacroAssembler::TimesEight));
m_jit.branchTest32(MacroAssembler::NonZero, scratch2GPR).linkTo(loop, &m_jit);
done.link(&m_jit);
Structure* structure = globalObject->arrayStructureForIndexingTypeDuringAllocation(indexingType);
emitAllocateJSObject<JSArray>(resultGPR, TrustedImmPtr(structure), storageGPR, scratchGPR, scratch2GPR, slowCases);
addSlowPathGenerator(std::make_unique<CallArrayAllocatorWithVariableSizeSlowPathGenerator>(
slowCases, this, operationNewArrayWithSize, resultGPR,
structure,
shouldConvertLargeSizeToArrayStorage ? globalObject->arrayStructureForIndexingTypeDuringAllocation(ArrayWithArrayStorage) : structure,
sizeGPR, storageGPR));
}
#endif
} } // namespace JSC::DFG
#endif