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webkit / WebKit / b11e7874ca019b0218066e938b93574cdd423e10 / . / Source / JavaScriptCore / dfg / DFGSpeculativeJIT32_64.cpp
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/*
* Copyright (C) 2011 Apple Inc. All rights reserved.
* Copyright (C) 2011 Intel Corporation. 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 "DFGSlowPathGenerator.h"
#include "JSVariableObject.h"
namespace JSC { namespace DFG {
#if USE(JSVALUE32_64)
GPRReg SpeculativeJIT::fillInteger(NodeIndex nodeIndex, DataFormat& returnFormat)
{
Node& node = at(nodeIndex);
VirtualRegister virtualRegister = node.virtualRegister();
GenerationInfo& info = m_generationInfo[virtualRegister];
if (info.registerFormat() == DataFormatNone) {
GPRReg gpr = allocate();
if (node.hasConstant()) {
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
if (isInt32Constant(nodeIndex))
m_jit.move(MacroAssembler::Imm32(valueOfInt32Constant(nodeIndex)), gpr);
else if (isNumberConstant(nodeIndex))
ASSERT_NOT_REACHED();
else {
ASSERT(isJSConstant(nodeIndex));
JSValue jsValue = valueOfJSConstant(nodeIndex);
m_jit.move(MacroAssembler::Imm32(jsValue.payload()), gpr);
}
} else {
ASSERT(info.spillFormat() == DataFormatJS || info.spillFormat() == DataFormatJSInteger || info.spillFormat() == DataFormatInteger);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.load32(JITCompiler::payloadFor(virtualRegister), gpr);
}
info.fillInteger(*m_stream, gpr);
returnFormat = DataFormatInteger;
return gpr;
}
switch (info.registerFormat()) {
case DataFormatNone:
// Should have filled, above.
case DataFormatJSDouble:
case DataFormatDouble:
case DataFormatJS:
case DataFormatCell:
case DataFormatJSCell:
case DataFormatBoolean:
case DataFormatJSBoolean:
case DataFormatStorage:
// Should only be calling this function if we know this operand to be integer.
ASSERT_NOT_REACHED();
case DataFormatJSInteger: {
GPRReg tagGPR = info.tagGPR();
GPRReg payloadGPR = info.payloadGPR();
m_gprs.lock(tagGPR);
m_jit.jitAssertIsJSInt32(tagGPR);
m_gprs.unlock(tagGPR);
m_gprs.lock(payloadGPR);
m_gprs.release(tagGPR);
m_gprs.release(payloadGPR);
m_gprs.retain(payloadGPR, virtualRegister, SpillOrderInteger);
info.fillInteger(*m_stream, payloadGPR);
returnFormat = DataFormatInteger;
return payloadGPR;
}
case DataFormatInteger: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
m_jit.jitAssertIsInt32(gpr);
returnFormat = DataFormatInteger;
return gpr;
}
default:
ASSERT_NOT_REACHED();
return InvalidGPRReg;
}
}
FPRReg SpeculativeJIT::fillDouble(NodeIndex nodeIndex)
{
Node& node = at(nodeIndex);
VirtualRegister virtualRegister = node.virtualRegister();
GenerationInfo& info = m_generationInfo[virtualRegister];
if (info.registerFormat() == DataFormatNone) {
if (node.hasConstant()) {
if (isInt32Constant(nodeIndex)) {
// FIXME: should not be reachable?
GPRReg gpr = allocate();
m_jit.move(MacroAssembler::Imm32(valueOfInt32Constant(nodeIndex)), gpr);
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
info.fillInteger(*m_stream, gpr);
unlock(gpr);
} else if (isNumberConstant(nodeIndex)) {
FPRReg fpr = fprAllocate();
m_jit.loadDouble(addressOfDoubleConstant(nodeIndex), fpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
return fpr;
} else {
// FIXME: should not be reachable?
ASSERT_NOT_REACHED();
}
} else {
DataFormat spillFormat = info.spillFormat();
ASSERT((spillFormat & DataFormatJS) || spillFormat == DataFormatInteger);
if (spillFormat == DataFormatJSDouble) {
FPRReg fpr = fprAllocate();
m_jit.loadDouble(JITCompiler::addressFor(virtualRegister), fpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderSpilled);
info.fillDouble(*m_stream, fpr);
return fpr;
}
FPRReg fpr = fprAllocate();
JITCompiler::Jump hasUnboxedDouble;
if (spillFormat != DataFormatJSInteger && spillFormat != DataFormatInteger) {
JITCompiler::Jump isInteger = m_jit.branch32(MacroAssembler::Equal, JITCompiler::tagFor(virtualRegister), TrustedImm32(JSValue::Int32Tag));
m_jit.loadDouble(JITCompiler::addressFor(virtualRegister), fpr);
hasUnboxedDouble = m_jit.jump();
isInteger.link(&m_jit);
}
m_jit.convertInt32ToDouble(JITCompiler::payloadFor(virtualRegister), fpr);
if (hasUnboxedDouble.isSet())
hasUnboxedDouble.link(&m_jit);
m_fprs.retain(fpr, virtualRegister, SpillOrderSpilled);
info.fillDouble(*m_stream, fpr);
return fpr;
}
}
switch (info.registerFormat()) {
case DataFormatNone:
// Should have filled, above.
case DataFormatCell:
case DataFormatJSCell:
case DataFormatBoolean:
case DataFormatJSBoolean:
case DataFormatStorage:
// Should only be calling this function if we know this operand to be numeric.
ASSERT_NOT_REACHED();
case DataFormatJSInteger:
case DataFormatJS: {
GPRReg tagGPR = info.tagGPR();
GPRReg payloadGPR = info.payloadGPR();
FPRReg fpr = fprAllocate();
m_gprs.lock(tagGPR);
m_gprs.lock(payloadGPR);
JITCompiler::Jump hasUnboxedDouble;
if (info.registerFormat() != DataFormatJSInteger) {
FPRTemporary scratch(this);
JITCompiler::Jump isInteger = m_jit.branch32(MacroAssembler::Equal, tagGPR, TrustedImm32(JSValue::Int32Tag));
m_jit.jitAssertIsJSDouble(tagGPR);
unboxDouble(tagGPR, payloadGPR, fpr, scratch.fpr());
hasUnboxedDouble = m_jit.jump();
isInteger.link(&m_jit);
}
m_jit.convertInt32ToDouble(payloadGPR, fpr);
if (hasUnboxedDouble.isSet())
hasUnboxedDouble.link(&m_jit);
m_gprs.release(tagGPR);
m_gprs.release(payloadGPR);
m_gprs.unlock(tagGPR);
m_gprs.unlock(payloadGPR);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
info.killSpilled();
return fpr;
}
case DataFormatInteger: {
FPRReg fpr = fprAllocate();
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
m_jit.convertInt32ToDouble(gpr, fpr);
m_gprs.unlock(gpr);
return fpr;
}
case DataFormatJSDouble:
case DataFormatDouble: {
FPRReg fpr = info.fpr();
m_fprs.lock(fpr);
return fpr;
}
default:
ASSERT_NOT_REACHED();
return InvalidFPRReg;
}
}
bool SpeculativeJIT::fillJSValue(NodeIndex nodeIndex, GPRReg& tagGPR, GPRReg& payloadGPR, FPRReg& fpr)
{
// FIXME: For double we could fill with a FPR.
UNUSED_PARAM(fpr);
Node& node = at(nodeIndex);
VirtualRegister virtualRegister = node.virtualRegister();
GenerationInfo& info = m_generationInfo[virtualRegister];
switch (info.registerFormat()) {
case DataFormatNone: {
if (node.hasConstant()) {
tagGPR = allocate();
payloadGPR = allocate();
m_jit.move(Imm32(valueOfJSConstant(nodeIndex).tag()), tagGPR);
m_jit.move(Imm32(valueOfJSConstant(nodeIndex).payload()), payloadGPR);
m_gprs.retain(tagGPR, virtualRegister, SpillOrderConstant);
m_gprs.retain(payloadGPR, virtualRegister, SpillOrderConstant);
info.fillJSValue(*m_stream, tagGPR, payloadGPR, isInt32Constant(nodeIndex) ? DataFormatJSInteger : DataFormatJS);
} else {
DataFormat spillFormat = info.spillFormat();
ASSERT(spillFormat != DataFormatNone && spillFormat != DataFormatStorage);
tagGPR = allocate();
payloadGPR = allocate();
switch (spillFormat) {
case DataFormatInteger:
m_jit.move(TrustedImm32(JSValue::Int32Tag), tagGPR);
spillFormat = DataFormatJSInteger; // This will be used as the new register format.
break;
case DataFormatCell:
m_jit.move(TrustedImm32(JSValue::CellTag), tagGPR);
spillFormat = DataFormatJSCell; // This will be used as the new register format.
break;
case DataFormatBoolean:
m_jit.move(TrustedImm32(JSValue::BooleanTag), tagGPR);
spillFormat = DataFormatJSBoolean; // This will be used as the new register format.
break;
default:
m_jit.load32(JITCompiler::tagFor(virtualRegister), tagGPR);
break;
}
m_jit.load32(JITCompiler::payloadFor(virtualRegister), payloadGPR);
m_gprs.retain(tagGPR, virtualRegister, SpillOrderSpilled);
m_gprs.retain(payloadGPR, virtualRegister, SpillOrderSpilled);
info.fillJSValue(*m_stream, tagGPR, payloadGPR, spillFormat == DataFormatJSDouble ? DataFormatJS : spillFormat);
}
return true;
}
case DataFormatInteger:
case DataFormatCell:
case DataFormatBoolean: {
GPRReg gpr = info.gpr();
// If the register has already been locked we need to take a copy.
if (m_gprs.isLocked(gpr)) {
payloadGPR = allocate();
m_jit.move(gpr, payloadGPR);
} else {
payloadGPR = gpr;
m_gprs.lock(gpr);
}
tagGPR = allocate();
uint32_t tag = JSValue::EmptyValueTag;
DataFormat fillFormat = DataFormatJS;
switch (info.registerFormat()) {
case DataFormatInteger:
tag = JSValue::Int32Tag;
fillFormat = DataFormatJSInteger;
break;
case DataFormatCell:
tag = JSValue::CellTag;
fillFormat = DataFormatJSCell;
break;
case DataFormatBoolean:
tag = JSValue::BooleanTag;
fillFormat = DataFormatJSBoolean;
break;
default:
ASSERT_NOT_REACHED();
break;
}
m_jit.move(TrustedImm32(tag), tagGPR);
m_gprs.release(gpr);
m_gprs.retain(tagGPR, virtualRegister, SpillOrderJS);
m_gprs.retain(payloadGPR, virtualRegister, SpillOrderJS);
info.fillJSValue(*m_stream, tagGPR, payloadGPR, fillFormat);
return true;
}
case DataFormatJSDouble:
case DataFormatDouble: {
FPRReg oldFPR = info.fpr();
m_fprs.lock(oldFPR);
tagGPR = allocate();
payloadGPR = allocate();
boxDouble(oldFPR, tagGPR, payloadGPR);
m_fprs.unlock(oldFPR);
m_fprs.release(oldFPR);
m_gprs.retain(tagGPR, virtualRegister, SpillOrderJS);
m_gprs.retain(payloadGPR, virtualRegister, SpillOrderJS);
info.fillJSValue(*m_stream, tagGPR, payloadGPR, DataFormatJS);
return true;
}
case DataFormatJS:
case DataFormatJSInteger:
case DataFormatJSCell:
case DataFormatJSBoolean: {
tagGPR = info.tagGPR();
payloadGPR = info.payloadGPR();
m_gprs.lock(tagGPR);
m_gprs.lock(payloadGPR);
return true;
}
case DataFormatStorage:
// this type currently never occurs
ASSERT_NOT_REACHED();
default:
ASSERT_NOT_REACHED();
return true;
}
}
class ValueToNumberSlowPathGenerator
: public CallSlowPathGenerator<MacroAssembler::Jump, D_DFGOperation_EJ, JSValueRegs> {
public:
ValueToNumberSlowPathGenerator(
MacroAssembler::Jump from, SpeculativeJIT* jit,
GPRReg resultTagGPR, GPRReg resultPayloadGPR, GPRReg jsValueTagGPR, GPRReg jsValuePayloadGPR)
: CallSlowPathGenerator<MacroAssembler::Jump, D_DFGOperation_EJ, JSValueRegs>(
from, jit, dfgConvertJSValueToNumber, NeedToSpill, JSValueRegs(resultTagGPR, resultPayloadGPR))
, m_jsValueTagGPR(jsValueTagGPR)
, m_jsValuePayloadGPR(jsValuePayloadGPR)
{
}
protected:
virtual void generateInternal(SpeculativeJIT* jit)
{
setUp(jit);
recordCall(jit->callOperation(dfgConvertJSValueToNumber, FPRInfo::returnValueFPR, m_jsValueTagGPR, m_jsValuePayloadGPR));
jit->boxDouble(FPRInfo::returnValueFPR, m_result.tagGPR(), m_result.payloadGPR());
tearDown(jit);
}
private:
GPRReg m_jsValueTagGPR;
GPRReg m_jsValuePayloadGPR;
};
void SpeculativeJIT::nonSpeculativeValueToNumber(Node& node)
{
if (isKnownNumeric(node.child1().index())) {
JSValueOperand op1(this, node.child1());
op1.fill();
if (op1.isDouble()) {
FPRTemporary result(this, op1);
m_jit.moveDouble(op1.fpr(), result.fpr());
doubleResult(result.fpr(), m_compileIndex);
} else {
GPRTemporary resultTag(this, op1);
GPRTemporary resultPayload(this, op1, false);
m_jit.move(op1.tagGPR(), resultTag.gpr());
m_jit.move(op1.payloadGPR(), resultPayload.gpr());
jsValueResult(resultTag.gpr(), resultPayload.gpr(), m_compileIndex);
}
return;
}
JSValueOperand op1(this, node.child1());
GPRTemporary resultTag(this, op1);
GPRTemporary resultPayload(this, op1, false);
ASSERT(!isInt32Constant(node.child1().index()));
ASSERT(!isNumberConstant(node.child1().index()));
GPRReg tagGPR = op1.tagGPR();
GPRReg payloadGPR = op1.payloadGPR();
GPRReg resultTagGPR = resultTag.gpr();
GPRReg resultPayloadGPR = resultPayload.gpr();
op1.use();
JITCompiler::Jump isInteger = m_jit.branch32(MacroAssembler::Equal, tagGPR, TrustedImm32(JSValue::Int32Tag));
JITCompiler::Jump nonNumeric = m_jit.branch32(MacroAssembler::AboveOrEqual, tagGPR, TrustedImm32(JSValue::LowestTag));
isInteger.link(&m_jit);
m_jit.move(tagGPR, resultTagGPR);
m_jit.move(payloadGPR, resultPayloadGPR);
addSlowPathGenerator(adoptPtr(new ValueToNumberSlowPathGenerator(nonNumeric, this, resultTagGPR, resultPayloadGPR, tagGPR, payloadGPR)));
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex, UseChildrenCalledExplicitly);
}
void SpeculativeJIT::nonSpeculativeValueToInt32(Node& node)
{
ASSERT(!isInt32Constant(node.child1().index()));
if (isKnownInteger(node.child1().index())) {
IntegerOperand op1(this, node.child1());
GPRTemporary result(this, op1);
m_jit.move(op1.gpr(), result.gpr());
integerResult(result.gpr(), m_compileIndex);
return;
}
GenerationInfo& childInfo = m_generationInfo[at(node.child1()).virtualRegister()];
if (childInfo.isJSDouble()) {
DoubleOperand op1(this, node.child1());
GPRTemporary result(this);
FPRReg fpr = op1.fpr();
GPRReg gpr = result.gpr();
op1.use();
JITCompiler::Jump notTruncatedToInteger = m_jit.branchTruncateDoubleToInt32(fpr, gpr, JITCompiler::BranchIfTruncateFailed);
addSlowPathGenerator(slowPathCall(notTruncatedToInteger, this, toInt32, gpr, fpr));
integerResult(gpr, m_compileIndex, UseChildrenCalledExplicitly);
return;
}
JSValueOperand op1(this, node.child1());
GPRTemporary result(this);
GPRReg tagGPR = op1.tagGPR();
GPRReg payloadGPR = op1.payloadGPR();
GPRReg resultGPR = result.gpr();
op1.use();
JITCompiler::Jump isNotInteger = m_jit.branch32(MacroAssembler::NotEqual, tagGPR, TrustedImm32(JSValue::Int32Tag));
m_jit.move(payloadGPR, resultGPR);
addSlowPathGenerator(slowPathCall(isNotInteger, this, dfgConvertJSValueToInt32, resultGPR, tagGPR, payloadGPR));
integerResult(resultGPR, m_compileIndex, UseChildrenCalledExplicitly);
}
void SpeculativeJIT::nonSpeculativeUInt32ToNumber(Node& node)
{
IntegerOperand op1(this, node.child1());
FPRTemporary boxer(this);
GPRTemporary resultTag(this, op1);
GPRTemporary resultPayload(this);
JITCompiler::Jump positive = m_jit.branch32(MacroAssembler::GreaterThanOrEqual, op1.gpr(), TrustedImm32(0));
m_jit.convertInt32ToDouble(op1.gpr(), boxer.fpr());
m_jit.move(JITCompiler::TrustedImmPtr(&AssemblyHelpers::twoToThe32), resultPayload.gpr()); // reuse resultPayload register here.
m_jit.addDouble(JITCompiler::Address(resultPayload.gpr(), 0), boxer.fpr());
boxDouble(boxer.fpr(), resultTag.gpr(), resultPayload.gpr());
JITCompiler::Jump done = m_jit.jump();
positive.link(&m_jit);
m_jit.move(TrustedImm32(JSValue::Int32Tag), resultTag.gpr());
m_jit.move(op1.gpr(), resultPayload.gpr());
done.link(&m_jit);
jsValueResult(resultTag.gpr(), resultPayload.gpr(), m_compileIndex);
}
void SpeculativeJIT::cachedGetById(CodeOrigin codeOrigin, GPRReg baseTagGPROrNone, GPRReg basePayloadGPR, GPRReg resultTagGPR, GPRReg resultPayloadGPR, unsigned identifierNumber, JITCompiler::Jump slowPathTarget, SpillRegistersMode spillMode)
{
JITCompiler::DataLabelPtr structureToCompare;
JITCompiler::PatchableJump structureCheck = m_jit.patchableBranchPtrWithPatch(JITCompiler::NotEqual, JITCompiler::Address(basePayloadGPR, JSCell::structureOffset()), structureToCompare, JITCompiler::TrustedImmPtr(reinterpret_cast<void*>(-1)));
JITCompiler::ConvertibleLoadLabel propertyStorageLoad = m_jit.convertibleLoadPtr(JITCompiler::Address(basePayloadGPR, JSObject::offsetOfOutOfLineStorage()), resultPayloadGPR);
JITCompiler::DataLabelCompact tagLoadWithPatch = m_jit.load32WithCompactAddressOffsetPatch(JITCompiler::Address(resultPayloadGPR, OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)), resultTagGPR);
JITCompiler::DataLabelCompact payloadLoadWithPatch = m_jit.load32WithCompactAddressOffsetPatch(JITCompiler::Address(resultPayloadGPR, OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)), resultPayloadGPR);
JITCompiler::Label doneLabel = m_jit.label();
OwnPtr<SlowPathGenerator> slowPath;
if (baseTagGPROrNone == InvalidGPRReg) {
if (!slowPathTarget.isSet()) {
slowPath = slowPathCall(
structureCheck.m_jump, this, operationGetByIdOptimize,
JSValueRegs(resultTagGPR, resultPayloadGPR),
static_cast<int32_t>(JSValue::CellTag), basePayloadGPR,
identifier(identifierNumber));
} else {
JITCompiler::JumpList slowCases;
slowCases.append(structureCheck.m_jump);
slowCases.append(slowPathTarget);
slowPath = slowPathCall(
slowCases, this, operationGetByIdOptimize,
JSValueRegs(resultTagGPR, resultPayloadGPR),
static_cast<int32_t>(JSValue::CellTag), basePayloadGPR,
identifier(identifierNumber));
}
} else {
if (!slowPathTarget.isSet()) {
slowPath = slowPathCall(
structureCheck.m_jump, this, operationGetByIdOptimize,
JSValueRegs(resultTagGPR, resultPayloadGPR), baseTagGPROrNone, basePayloadGPR,
identifier(identifierNumber));
} else {
JITCompiler::JumpList slowCases;
slowCases.append(structureCheck.m_jump);
slowCases.append(slowPathTarget);
slowPath = slowPathCall(
slowCases, this, operationGetByIdOptimize,
JSValueRegs(resultTagGPR, resultPayloadGPR), baseTagGPROrNone, basePayloadGPR,
identifier(identifierNumber));
}
}
m_jit.addPropertyAccess(
PropertyAccessRecord(
codeOrigin, structureToCompare, structureCheck, propertyStorageLoad,
tagLoadWithPatch, payloadLoadWithPatch, slowPath.get(), doneLabel,
safeCast<int8_t>(basePayloadGPR), safeCast<int8_t>(resultTagGPR),
safeCast<int8_t>(resultPayloadGPR), usedRegisters(),
spillMode == NeedToSpill ? PropertyAccessRecord::RegistersInUse : PropertyAccessRecord::RegistersFlushed));
addSlowPathGenerator(slowPath.release());
}
void SpeculativeJIT::cachedPutById(CodeOrigin codeOrigin, GPRReg basePayloadGPR, GPRReg valueTagGPR, GPRReg valuePayloadGPR, Edge valueUse, GPRReg scratchGPR, unsigned identifierNumber, PutKind putKind, JITCompiler::Jump slowPathTarget)
{
JITCompiler::DataLabelPtr structureToCompare;
JITCompiler::PatchableJump structureCheck = m_jit.patchableBranchPtrWithPatch(JITCompiler::NotEqual, JITCompiler::Address(basePayloadGPR, JSCell::structureOffset()), structureToCompare, JITCompiler::TrustedImmPtr(reinterpret_cast<void*>(-1)));
writeBarrier(basePayloadGPR, valueTagGPR, valueUse, WriteBarrierForPropertyAccess, scratchGPR);
JITCompiler::ConvertibleLoadLabel propertyStorageLoad = m_jit.convertibleLoadPtr(JITCompiler::Address(basePayloadGPR, JSObject::offsetOfOutOfLineStorage()), scratchGPR);
JITCompiler::DataLabel32 tagStoreWithPatch = m_jit.store32WithAddressOffsetPatch(valueTagGPR, JITCompiler::Address(scratchGPR, OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)));
JITCompiler::DataLabel32 payloadStoreWithPatch = m_jit.store32WithAddressOffsetPatch(valuePayloadGPR, JITCompiler::Address(scratchGPR, OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)));
JITCompiler::Label doneLabel = m_jit.label();
V_DFGOperation_EJCI optimizedCall;
if (m_jit.strictModeFor(at(m_compileIndex).codeOrigin)) {
if (putKind == Direct)
optimizedCall = operationPutByIdDirectStrictOptimize;
else
optimizedCall = operationPutByIdStrictOptimize;
} else {
if (putKind == Direct)
optimizedCall = operationPutByIdDirectNonStrictOptimize;
else
optimizedCall = operationPutByIdNonStrictOptimize;
}
OwnPtr<SlowPathGenerator> slowPath;
if (!slowPathTarget.isSet()) {
slowPath = slowPathCall(
structureCheck.m_jump, this, optimizedCall, NoResult, valueTagGPR, valuePayloadGPR,
basePayloadGPR, identifier(identifierNumber));
} else {
JITCompiler::JumpList slowCases;
slowCases.append(structureCheck.m_jump);
slowCases.append(slowPathTarget);
slowPath = slowPathCall(
slowCases, this, optimizedCall, NoResult, valueTagGPR, valuePayloadGPR,
basePayloadGPR, identifier(identifierNumber));
}
RegisterSet currentlyUsedRegisters = usedRegisters();
currentlyUsedRegisters.clear(scratchGPR);
ASSERT(currentlyUsedRegisters.get(basePayloadGPR));
ASSERT(currentlyUsedRegisters.get(valueTagGPR));
ASSERT(currentlyUsedRegisters.get(valuePayloadGPR));
m_jit.addPropertyAccess(
PropertyAccessRecord(
codeOrigin, structureToCompare, structureCheck, propertyStorageLoad,
JITCompiler::DataLabelCompact(tagStoreWithPatch.label()),
JITCompiler::DataLabelCompact(payloadStoreWithPatch.label()),
slowPath.get(), doneLabel, safeCast<int8_t>(basePayloadGPR),
safeCast<int8_t>(valueTagGPR), safeCast<int8_t>(valuePayloadGPR),
usedRegisters()));
addSlowPathGenerator(slowPath.release());
}
void SpeculativeJIT::nonSpeculativeNonPeepholeCompareNull(Edge operand, bool invert)
{
JSValueOperand arg(this, operand);
GPRReg argTagGPR = arg.tagGPR();
GPRReg argPayloadGPR = arg.payloadGPR();
GPRTemporary resultPayload(this, arg, false);
GPRReg resultPayloadGPR = resultPayload.gpr();
JITCompiler::Jump notCell;
if (!isKnownCell(operand.index()))
notCell = m_jit.branch32(MacroAssembler::NotEqual, argTagGPR, TrustedImm32(JSValue::CellTag));
JITCompiler::Jump notMasqueradesAsUndefined;
if (m_jit.graph().globalObjectFor(m_jit.graph()[operand].codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(m_jit.graph()[operand].codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
m_jit.move(invert ? TrustedImm32(1) : TrustedImm32(0), resultPayloadGPR);
notMasqueradesAsUndefined = m_jit.jump();
} else {
m_jit.loadPtr(JITCompiler::Address(argPayloadGPR, JSCell::structureOffset()), resultPayloadGPR);
JITCompiler::Jump isMasqueradesAsUndefined = m_jit.branchTest8(JITCompiler::NonZero, JITCompiler::Address(resultPayloadGPR, Structure::typeInfoFlagsOffset()), JITCompiler::TrustedImm32(MasqueradesAsUndefined));
m_jit.move(invert ? TrustedImm32(1) : TrustedImm32(0), resultPayloadGPR);
notMasqueradesAsUndefined = m_jit.jump();
isMasqueradesAsUndefined.link(&m_jit);
GPRTemporary localGlobalObject(this);
GPRTemporary remoteGlobalObject(this);
GPRReg localGlobalObjectGPR = localGlobalObject.gpr();
GPRReg remoteGlobalObjectGPR = remoteGlobalObject.gpr();
m_jit.move(JITCompiler::TrustedImmPtr(m_jit.graph().globalObjectFor(m_jit.graph()[operand].codeOrigin)), localGlobalObjectGPR);
m_jit.loadPtr(JITCompiler::Address(resultPayloadGPR, Structure::globalObjectOffset()), remoteGlobalObjectGPR);
m_jit.compare32(invert ? JITCompiler::NotEqual : JITCompiler::Equal, localGlobalObjectGPR, remoteGlobalObjectGPR, resultPayloadGPR);
}
if (!isKnownCell(operand.index())) {
JITCompiler::Jump done = m_jit.jump();
notCell.link(&m_jit);
// null or undefined?
COMPILE_ASSERT((JSValue::UndefinedTag | 1) == JSValue::NullTag, UndefinedTag_OR_1_EQUALS_NullTag);
m_jit.move(argTagGPR, resultPayloadGPR);
m_jit.or32(TrustedImm32(1), resultPayloadGPR);
m_jit.compare32(invert ? JITCompiler::NotEqual : JITCompiler::Equal, resultPayloadGPR, TrustedImm32(JSValue::NullTag), resultPayloadGPR);
done.link(&m_jit);
}
notMasqueradesAsUndefined.link(&m_jit);
booleanResult(resultPayloadGPR, m_compileIndex);
}
void SpeculativeJIT::nonSpeculativePeepholeBranchNull(Edge operand, NodeIndex branchNodeIndex, bool invert)
{
Node& branchNode = at(branchNodeIndex);
BlockIndex taken = branchNode.takenBlockIndex();
BlockIndex notTaken = branchNode.notTakenBlockIndex();
if (taken == nextBlock()) {
invert = !invert;
BlockIndex tmp = taken;
taken = notTaken;
notTaken = tmp;
}
JSValueOperand arg(this, operand);
GPRReg argTagGPR = arg.tagGPR();
GPRReg argPayloadGPR = arg.payloadGPR();
GPRTemporary result(this, arg);
GPRReg resultGPR = result.gpr();
JITCompiler::Jump notCell;
if (!isKnownCell(operand.index()))
notCell = m_jit.branch32(MacroAssembler::NotEqual, argTagGPR, TrustedImm32(JSValue::CellTag));
if (m_jit.graph().globalObjectFor(m_jit.graph()[operand].codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(m_jit.graph()[operand].codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
jump(invert ? taken : notTaken, ForceJump);
} else {
m_jit.loadPtr(JITCompiler::Address(argPayloadGPR, JSCell::structureOffset()), resultGPR);
branchTest8(JITCompiler::Zero, JITCompiler::Address(resultGPR, Structure::typeInfoFlagsOffset()), JITCompiler::TrustedImm32(MasqueradesAsUndefined), invert ? taken : notTaken);
GPRTemporary localGlobalObject(this);
GPRTemporary remoteGlobalObject(this);
GPRReg localGlobalObjectGPR = localGlobalObject.gpr();
GPRReg remoteGlobalObjectGPR = remoteGlobalObject.gpr();
m_jit.move(TrustedImmPtr(m_jit.graph().globalObjectFor(m_jit.graph()[operand].codeOrigin)), localGlobalObjectGPR);
m_jit.loadPtr(JITCompiler::Address(resultGPR, Structure::globalObjectOffset()), remoteGlobalObjectGPR);
branchPtr(JITCompiler::Equal, localGlobalObjectGPR, remoteGlobalObjectGPR, invert ? notTaken : taken);
}
if (!isKnownCell(operand.index())) {
jump(notTaken, ForceJump);
notCell.link(&m_jit);
// null or undefined?
COMPILE_ASSERT((JSValue::UndefinedTag | 1) == JSValue::NullTag, UndefinedTag_OR_1_EQUALS_NullTag);
m_jit.move(argTagGPR, resultGPR);
m_jit.or32(TrustedImm32(1), resultGPR);
branch32(invert ? JITCompiler::NotEqual : JITCompiler::Equal, resultGPR, JITCompiler::TrustedImm32(JSValue::NullTag), taken);
}
jump(notTaken);
}
bool SpeculativeJIT::nonSpeculativeCompareNull(Node& node, Edge operand, bool invert)
{
unsigned branchIndexInBlock = detectPeepHoleBranch();
if (branchIndexInBlock != UINT_MAX) {
NodeIndex branchNodeIndex = m_jit.graph().m_blocks[m_block]->at(branchIndexInBlock);
ASSERT(node.adjustedRefCount() == 1);
nonSpeculativePeepholeBranchNull(operand, branchNodeIndex, invert);
use(node.child1());
use(node.child2());
m_indexInBlock = branchIndexInBlock;
m_compileIndex = branchNodeIndex;
return true;
}
nonSpeculativeNonPeepholeCompareNull(operand, invert);
return false;
}
void SpeculativeJIT::nonSpeculativePeepholeBranch(Node& node, NodeIndex branchNodeIndex, MacroAssembler::RelationalCondition cond, S_DFGOperation_EJJ helperFunction)
{
Node& branchNode = at(branchNodeIndex);
BlockIndex taken = branchNode.takenBlockIndex();
BlockIndex notTaken = branchNode.notTakenBlockIndex();
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;
BlockIndex tmp = taken;
taken = notTaken;
notTaken = tmp;
}
JSValueOperand arg1(this, node.child1());
JSValueOperand arg2(this, node.child2());
GPRReg arg1TagGPR = arg1.tagGPR();
GPRReg arg1PayloadGPR = arg1.payloadGPR();
GPRReg arg2TagGPR = arg2.tagGPR();
GPRReg arg2PayloadGPR = arg2.payloadGPR();
JITCompiler::JumpList slowPath;
if (isKnownNotInteger(node.child1().index()) || isKnownNotInteger(node.child2().index())) {
GPRResult result(this);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
flushRegisters();
callOperation(helperFunction, resultGPR, arg1TagGPR, arg1PayloadGPR, arg2TagGPR, arg2PayloadGPR);
branchTest32(callResultCondition, resultGPR, taken);
} else {
GPRTemporary result(this);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
if (!isKnownInteger(node.child1().index()))
slowPath.append(m_jit.branch32(MacroAssembler::NotEqual, arg1TagGPR, JITCompiler::TrustedImm32(JSValue::Int32Tag)));
if (!isKnownInteger(node.child2().index()))
slowPath.append(m_jit.branch32(MacroAssembler::NotEqual, arg2TagGPR, JITCompiler::TrustedImm32(JSValue::Int32Tag)));
branch32(cond, arg1PayloadGPR, arg2PayloadGPR, taken);
if (!isKnownInteger(node.child1().index()) || !isKnownInteger(node.child2().index())) {
jump(notTaken, ForceJump);
slowPath.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(helperFunction, resultGPR, arg1TagGPR, arg1PayloadGPR, arg2TagGPR, arg2PayloadGPR);
silentFillAllRegisters(resultGPR);
branchTest32(callResultCondition, resultGPR, taken);
}
}
jump(notTaken);
m_indexInBlock = m_jit.graph().m_blocks[m_block]->size() - 1;
m_compileIndex = branchNodeIndex;
}
template<typename JumpType>
class CompareAndBoxBooleanSlowPathGenerator
: public CallSlowPathGenerator<JumpType, S_DFGOperation_EJJ, GPRReg> {
public:
CompareAndBoxBooleanSlowPathGenerator(
JumpType from, SpeculativeJIT* jit,
S_DFGOperation_EJJ function, GPRReg result, GPRReg arg1Tag, GPRReg arg1Payload,
GPRReg arg2Tag, GPRReg arg2Payload)
: CallSlowPathGenerator<JumpType, S_DFGOperation_EJJ, GPRReg>(
from, jit, function, NeedToSpill, result)
, m_arg1Tag(arg1Tag)
, m_arg1Payload(arg1Payload)
, m_arg2Tag(arg2Tag)
, m_arg2Payload(arg2Payload)
{
}
protected:
virtual void generateInternal(SpeculativeJIT* jit)
{
this->setUp(jit);
this->recordCall(
jit->callOperation(
this->m_function, this->m_result, m_arg1Tag, m_arg1Payload, m_arg2Tag,
m_arg2Payload));
jit->m_jit.and32(JITCompiler::TrustedImm32(1), this->m_result);
this->tearDown(jit);
}
private:
GPRReg m_arg1Tag;
GPRReg m_arg1Payload;
GPRReg m_arg2Tag;
GPRReg m_arg2Payload;
};
void SpeculativeJIT::nonSpeculativeNonPeepholeCompare(Node& node, MacroAssembler::RelationalCondition cond, S_DFGOperation_EJJ helperFunction)
{
JSValueOperand arg1(this, node.child1());
JSValueOperand arg2(this, node.child2());
GPRReg arg1TagGPR = arg1.tagGPR();
GPRReg arg1PayloadGPR = arg1.payloadGPR();
GPRReg arg2TagGPR = arg2.tagGPR();
GPRReg arg2PayloadGPR = arg2.payloadGPR();
JITCompiler::JumpList slowPath;
if (isKnownNotInteger(node.child1().index()) || isKnownNotInteger(node.child2().index())) {
GPRResult result(this);
GPRReg resultPayloadGPR = result.gpr();
arg1.use();
arg2.use();
flushRegisters();
callOperation(helperFunction, resultPayloadGPR, arg1TagGPR, arg1PayloadGPR, arg2TagGPR, arg2PayloadGPR);
booleanResult(resultPayloadGPR, m_compileIndex, UseChildrenCalledExplicitly);
} else {
GPRTemporary resultPayload(this, arg1, false);
GPRReg resultPayloadGPR = resultPayload.gpr();
arg1.use();
arg2.use();
if (!isKnownInteger(node.child1().index()))
slowPath.append(m_jit.branch32(MacroAssembler::NotEqual, arg1TagGPR, JITCompiler::TrustedImm32(JSValue::Int32Tag)));
if (!isKnownInteger(node.child2().index()))
slowPath.append(m_jit.branch32(MacroAssembler::NotEqual, arg2TagGPR, JITCompiler::TrustedImm32(JSValue::Int32Tag)));
m_jit.compare32(cond, arg1PayloadGPR, arg2PayloadGPR, resultPayloadGPR);
if (!isKnownInteger(node.child1().index()) || !isKnownInteger(node.child2().index())) {
addSlowPathGenerator(adoptPtr(
new CompareAndBoxBooleanSlowPathGenerator<JITCompiler::JumpList>(
slowPath, this, helperFunction, resultPayloadGPR, arg1TagGPR,
arg1PayloadGPR, arg2TagGPR, arg2PayloadGPR)));
}
booleanResult(resultPayloadGPR, m_compileIndex, UseChildrenCalledExplicitly);
}
}
void SpeculativeJIT::nonSpeculativePeepholeStrictEq(Node& node, NodeIndex branchNodeIndex, bool invert)
{
Node& branchNode = at(branchNodeIndex);
BlockIndex taken = branchNode.takenBlockIndex();
BlockIndex notTaken = branchNode.notTakenBlockIndex();
// 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;
BlockIndex tmp = taken;
taken = notTaken;
notTaken = tmp;
}
JSValueOperand arg1(this, node.child1());
JSValueOperand arg2(this, node.child2());
GPRReg arg1TagGPR = arg1.tagGPR();
GPRReg arg1PayloadGPR = arg1.payloadGPR();
GPRReg arg2TagGPR = arg2.tagGPR();
GPRReg arg2PayloadGPR = arg2.payloadGPR();
GPRTemporary resultPayload(this, arg1, false);
GPRReg resultPayloadGPR = resultPayload.gpr();
arg1.use();
arg2.use();
if (isKnownCell(node.child1().index()) && isKnownCell(node.child2().index())) {
// see if we get lucky: if the arguments are cells and they reference the same
// cell, then they must be strictly equal.
branchPtr(JITCompiler::Equal, arg1PayloadGPR, arg2PayloadGPR, invert ? notTaken : taken);
silentSpillAllRegisters(resultPayloadGPR);
callOperation(operationCompareStrictEqCell, resultPayloadGPR, arg1TagGPR, arg1PayloadGPR, arg2TagGPR, arg2PayloadGPR);
silentFillAllRegisters(resultPayloadGPR);
branchTest32(invert ? JITCompiler::Zero : JITCompiler::NonZero, resultPayloadGPR, taken);
} else {
// FIXME: Add fast paths for twoCells, number etc.
silentSpillAllRegisters(resultPayloadGPR);
callOperation(operationCompareStrictEq, resultPayloadGPR, arg1TagGPR, arg1PayloadGPR, arg2TagGPR, arg2PayloadGPR);
silentFillAllRegisters(resultPayloadGPR);
branchTest32(invert ? JITCompiler::Zero : JITCompiler::NonZero, resultPayloadGPR, taken);
}
jump(notTaken);
}
void SpeculativeJIT::nonSpeculativeNonPeepholeStrictEq(Node& node, bool invert)
{
JSValueOperand arg1(this, node.child1());
JSValueOperand arg2(this, node.child2());
GPRReg arg1TagGPR = arg1.tagGPR();
GPRReg arg1PayloadGPR = arg1.payloadGPR();
GPRReg arg2TagGPR = arg2.tagGPR();
GPRReg arg2PayloadGPR = arg2.payloadGPR();
GPRTemporary resultPayload(this, arg1, false);
GPRReg resultPayloadGPR = resultPayload.gpr();
arg1.use();
arg2.use();
if (isKnownCell(node.child1().index()) && isKnownCell(node.child2().index())) {
// 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.branchPtr(JITCompiler::NotEqual, arg1PayloadGPR, arg2PayloadGPR);
m_jit.move(JITCompiler::TrustedImm32(!invert), resultPayloadGPR);
JITCompiler::Jump done = m_jit.jump();
notEqualCase.link(&m_jit);
silentSpillAllRegisters(resultPayloadGPR);
callOperation(operationCompareStrictEqCell, resultPayloadGPR, arg1TagGPR, arg1PayloadGPR, arg2TagGPR, arg2PayloadGPR);
silentFillAllRegisters(resultPayloadGPR);
m_jit.andPtr(JITCompiler::TrustedImm32(1), resultPayloadGPR);
done.link(&m_jit);
} else {
// FIXME: Add fast paths.
silentSpillAllRegisters(resultPayloadGPR);
callOperation(operationCompareStrictEq, resultPayloadGPR, arg1TagGPR, arg1PayloadGPR, arg2TagGPR, arg2PayloadGPR);
silentFillAllRegisters(resultPayloadGPR);
m_jit.andPtr(JITCompiler::TrustedImm32(1), resultPayloadGPR);
}
booleanResult(resultPayloadGPR, m_compileIndex, UseChildrenCalledExplicitly);
}
void SpeculativeJIT::emitCall(Node& node)
{
if (node.op() != Call)
ASSERT(node.op() == Construct);
// For constructors, the this argument is not passed but we have to make space
// for it.
int dummyThisArgument = node.op() == Call ? 0 : 1;
CallLinkInfo::CallType callType = node.op() == Call ? CallLinkInfo::Call : CallLinkInfo::Construct;
Edge calleeEdge = m_jit.graph().m_varArgChildren[node.firstChild()];
JSValueOperand callee(this, calleeEdge);
GPRReg calleeTagGPR = callee.tagGPR();
GPRReg calleePayloadGPR = callee.payloadGPR();
use(calleeEdge);
// The call instruction's first child is either the function (normal call) or the
// receiver (method call). subsequent children are the arguments.
int numPassedArgs = node.numChildren() - 1;
m_jit.store32(MacroAssembler::TrustedImm32(numPassedArgs + dummyThisArgument), callFramePayloadSlot(RegisterFile::ArgumentCount));
m_jit.storePtr(GPRInfo::callFrameRegister, callFramePayloadSlot(RegisterFile::CallerFrame));
m_jit.store32(calleePayloadGPR, callFramePayloadSlot(RegisterFile::Callee));
m_jit.store32(calleeTagGPR, callFrameTagSlot(RegisterFile::Callee));
for (int i = 0; i < numPassedArgs; i++) {
Edge argEdge = m_jit.graph().m_varArgChildren[node.firstChild() + 1 + i];
JSValueOperand arg(this, argEdge);
GPRReg argTagGPR = arg.tagGPR();
GPRReg argPayloadGPR = arg.payloadGPR();
use(argEdge);
m_jit.store32(argTagGPR, argumentTagSlot(i + dummyThisArgument));
m_jit.store32(argPayloadGPR, argumentPayloadSlot(i + dummyThisArgument));
}
flushRegisters();
GPRResult resultPayload(this);
GPRResult2 resultTag(this);
GPRReg resultPayloadGPR = resultPayload.gpr();
GPRReg resultTagGPR = resultTag.gpr();
JITCompiler::DataLabelPtr targetToCheck;
JITCompiler::JumpList slowPath;
CallBeginToken token;
m_jit.beginCall(node.codeOrigin, token);
m_jit.addPtr(TrustedImm32(m_jit.codeBlock()->m_numCalleeRegisters * sizeof(Register)), GPRInfo::callFrameRegister);
slowPath.append(m_jit.branchPtrWithPatch(MacroAssembler::NotEqual, calleePayloadGPR, targetToCheck));
slowPath.append(m_jit.branch32(MacroAssembler::NotEqual, calleeTagGPR, TrustedImm32(JSValue::CellTag)));
m_jit.loadPtr(MacroAssembler::Address(calleePayloadGPR, OBJECT_OFFSETOF(JSFunction, m_scope)), resultPayloadGPR);
m_jit.storePtr(resultPayloadGPR, MacroAssembler::Address(GPRInfo::callFrameRegister, static_cast<ptrdiff_t>(sizeof(Register)) * RegisterFile::ScopeChain + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)));
m_jit.store32(MacroAssembler::TrustedImm32(JSValue::CellTag), MacroAssembler::Address(GPRInfo::callFrameRegister, static_cast<ptrdiff_t>(sizeof(Register)) * RegisterFile::ScopeChain + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)));
CodeOrigin codeOrigin = at(m_compileIndex).codeOrigin;
JITCompiler::Call fastCall = m_jit.nearCall();
m_jit.notifyCall(fastCall, codeOrigin, token);
JITCompiler::Jump done = m_jit.jump();
slowPath.link(&m_jit);
if (calleeTagGPR == GPRInfo::nonArgGPR0) {
if (calleePayloadGPR == GPRInfo::nonArgGPR1)
m_jit.swap(GPRInfo::nonArgGPR1, GPRInfo::nonArgGPR0);
else {
m_jit.move(calleeTagGPR, GPRInfo::nonArgGPR1);
m_jit.move(calleePayloadGPR, GPRInfo::nonArgGPR0);
}
} else {
m_jit.move(calleePayloadGPR, GPRInfo::nonArgGPR0);
m_jit.move(calleeTagGPR, GPRInfo::nonArgGPR1);
}
m_jit.prepareForExceptionCheck();
JITCompiler::Call slowCall = m_jit.nearCall();
m_jit.notifyCall(slowCall, codeOrigin, token);
done.link(&m_jit);
m_jit.setupResults(resultPayloadGPR, resultTagGPR);
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex, DataFormatJS, UseChildrenCalledExplicitly);
m_jit.addJSCall(fastCall, slowCall, targetToCheck, callType, at(m_compileIndex).codeOrigin);
}
template<bool strict>
GPRReg SpeculativeJIT::fillSpeculateIntInternal(NodeIndex nodeIndex, DataFormat& returnFormat)
{
#if DFG_ENABLE(DEBUG_VERBOSE)
dataLog("SpecInt@%d ", nodeIndex);
#endif
if (isKnownNotInteger(nodeIndex)) {
terminateSpeculativeExecution(Uncountable, JSValueRegs(), NoNode);
returnFormat = DataFormatInteger;
return allocate();
}
SpeculatedType type = m_state.forNode(nodeIndex).m_type;
Node& node = at(nodeIndex);
VirtualRegister virtualRegister = node.virtualRegister();
GenerationInfo& info = m_generationInfo[virtualRegister];
switch (info.registerFormat()) {
case DataFormatNone: {
if (node.hasConstant()) {
ASSERT(isInt32Constant(nodeIndex));
GPRReg gpr = allocate();
m_jit.move(MacroAssembler::Imm32(valueOfInt32Constant(nodeIndex)), gpr);
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
info.fillInteger(*m_stream, gpr);
returnFormat = DataFormatInteger;
return gpr;
}
DataFormat spillFormat = info.spillFormat();
ASSERT_UNUSED(spillFormat, (spillFormat & DataFormatJS) || spillFormat == DataFormatInteger);
// If we know this was spilled as an integer we can fill without checking.
if (!isInt32Speculation(type))
speculationCheck(BadType, JSValueSource(JITCompiler::addressFor(virtualRegister)), nodeIndex, m_jit.branch32(MacroAssembler::NotEqual, JITCompiler::tagFor(virtualRegister), TrustedImm32(JSValue::Int32Tag)));
GPRReg gpr = allocate();
m_jit.load32(JITCompiler::payloadFor(virtualRegister), gpr);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
info.fillInteger(*m_stream, gpr);
returnFormat = DataFormatInteger;
return gpr;
}
case DataFormatJSInteger:
case DataFormatJS: {
// Check the value is an integer.
GPRReg tagGPR = info.tagGPR();
GPRReg payloadGPR = info.payloadGPR();
m_gprs.lock(tagGPR);
m_gprs.lock(payloadGPR);
if (!isInt32Speculation(type))
speculationCheck(BadType, JSValueRegs(tagGPR, payloadGPR), nodeIndex, m_jit.branch32(MacroAssembler::NotEqual, tagGPR, TrustedImm32(JSValue::Int32Tag)));
m_gprs.unlock(tagGPR);
m_gprs.release(tagGPR);
m_gprs.release(payloadGPR);
m_gprs.retain(payloadGPR, virtualRegister, SpillOrderInteger);
info.fillInteger(*m_stream, payloadGPR);
// If !strict we're done, return.
returnFormat = DataFormatInteger;
return payloadGPR;
}
case DataFormatInteger: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
returnFormat = DataFormatInteger;
return gpr;
}
case DataFormatDouble:
case DataFormatCell:
case DataFormatBoolean:
case DataFormatJSDouble:
case DataFormatJSCell:
case DataFormatJSBoolean:
case DataFormatStorage:
ASSERT_NOT_REACHED();
default:
ASSERT_NOT_REACHED();
return InvalidGPRReg;
}
}
GPRReg SpeculativeJIT::fillSpeculateInt(NodeIndex nodeIndex, DataFormat& returnFormat)
{
return fillSpeculateIntInternal<false>(nodeIndex, returnFormat);
}
GPRReg SpeculativeJIT::fillSpeculateIntStrict(NodeIndex nodeIndex)
{
DataFormat mustBeDataFormatInteger;
GPRReg result = fillSpeculateIntInternal<true>(nodeIndex, mustBeDataFormatInteger);
ASSERT(mustBeDataFormatInteger == DataFormatInteger);
return result;
}
FPRReg SpeculativeJIT::fillSpeculateDouble(NodeIndex nodeIndex)
{
#if DFG_ENABLE(DEBUG_VERBOSE)
dataLog("SpecDouble@%d ", nodeIndex);
#endif
if (isKnownNotNumber(nodeIndex)) {
terminateSpeculativeExecution(Uncountable, JSValueRegs(), NoNode);
return fprAllocate();
}
SpeculatedType type = m_state.forNode(nodeIndex).m_type;
Node& node = at(nodeIndex);
VirtualRegister virtualRegister = node.virtualRegister();
GenerationInfo& info = m_generationInfo[virtualRegister];
if (info.registerFormat() == DataFormatNone) {
if (node.hasConstant()) {
if (isInt32Constant(nodeIndex)) {
GPRReg gpr = allocate();
m_jit.move(MacroAssembler::Imm32(valueOfInt32Constant(nodeIndex)), gpr);
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
info.fillInteger(*m_stream, gpr);
unlock(gpr);
} else if (isNumberConstant(nodeIndex)) {
FPRReg fpr = fprAllocate();
m_jit.loadDouble(addressOfDoubleConstant(nodeIndex), fpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderConstant);
info.fillDouble(*m_stream, fpr);
return fpr;
} else
ASSERT_NOT_REACHED();
} else {
DataFormat spillFormat = info.spillFormat();
ASSERT((spillFormat & DataFormatJS) || spillFormat == DataFormatInteger);
if (spillFormat == DataFormatJSDouble || spillFormat == DataFormatDouble) {
FPRReg fpr = fprAllocate();
m_jit.loadDouble(JITCompiler::addressFor(virtualRegister), fpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderSpilled);
info.fillDouble(*m_stream, fpr);
return fpr;
}
FPRReg fpr = fprAllocate();
JITCompiler::Jump hasUnboxedDouble;
if (spillFormat != DataFormatJSInteger && spillFormat != DataFormatInteger) {
JITCompiler::Jump isInteger = m_jit.branch32(MacroAssembler::Equal, JITCompiler::tagFor(virtualRegister), TrustedImm32(JSValue::Int32Tag));
if (!isNumberSpeculation(type))
speculationCheck(BadType, JSValueSource(JITCompiler::addressFor(virtualRegister)), nodeIndex, m_jit.branch32(MacroAssembler::AboveOrEqual, JITCompiler::tagFor(virtualRegister), TrustedImm32(JSValue::LowestTag)));
m_jit.loadDouble(JITCompiler::addressFor(virtualRegister), fpr);
hasUnboxedDouble = m_jit.jump();
isInteger.link(&m_jit);
}
m_jit.convertInt32ToDouble(JITCompiler::payloadFor(virtualRegister), fpr);
if (hasUnboxedDouble.isSet())
hasUnboxedDouble.link(&m_jit);
m_fprs.retain(fpr, virtualRegister, SpillOrderSpilled);
info.fillDouble(*m_stream, fpr);
info.killSpilled();
return fpr;
}
}
switch (info.registerFormat()) {
case DataFormatJS:
case DataFormatJSInteger: {
GPRReg tagGPR = info.tagGPR();
GPRReg payloadGPR = info.payloadGPR();
FPRReg fpr = fprAllocate();
m_gprs.lock(tagGPR);
m_gprs.lock(payloadGPR);
JITCompiler::Jump hasUnboxedDouble;
if (info.registerFormat() != DataFormatJSInteger) {
FPRTemporary scratch(this);
JITCompiler::Jump isInteger = m_jit.branch32(MacroAssembler::Equal, tagGPR, TrustedImm32(JSValue::Int32Tag));
if (!isNumberSpeculation(type))
speculationCheck(BadType, JSValueRegs(tagGPR, payloadGPR), nodeIndex, m_jit.branch32(MacroAssembler::AboveOrEqual, tagGPR, TrustedImm32(JSValue::LowestTag)));
unboxDouble(tagGPR, payloadGPR, fpr, scratch.fpr());
hasUnboxedDouble = m_jit.jump();
isInteger.link(&m_jit);
}
m_jit.convertInt32ToDouble(payloadGPR, fpr);
if (hasUnboxedDouble.isSet())
hasUnboxedDouble.link(&m_jit);
m_gprs.release(tagGPR);
m_gprs.release(payloadGPR);
m_gprs.unlock(tagGPR);
m_gprs.unlock(payloadGPR);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
info.killSpilled();
return fpr;
}
case DataFormatInteger: {
FPRReg fpr = fprAllocate();
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
m_jit.convertInt32ToDouble(gpr, fpr);
m_gprs.unlock(gpr);
return fpr;
}
case DataFormatJSDouble:
case DataFormatDouble: {
FPRReg fpr = info.fpr();
m_fprs.lock(fpr);
return fpr;
}
case DataFormatNone:
case DataFormatStorage:
case DataFormatCell:
case DataFormatJSCell:
case DataFormatBoolean:
case DataFormatJSBoolean:
ASSERT_NOT_REACHED();
default:
ASSERT_NOT_REACHED();
return InvalidFPRReg;
}
}
GPRReg SpeculativeJIT::fillSpeculateCell(NodeIndex nodeIndex, bool isForwardSpeculation)
{
#if DFG_ENABLE(DEBUG_VERBOSE)
dataLog("SpecCell@%d ", nodeIndex);
#endif
if (isKnownNotCell(nodeIndex)) {
terminateSpeculativeExecutionWithConditionalDirection(Uncountable, JSValueRegs(), NoNode, isForwardSpeculation);
return allocate();
}
SpeculatedType type = m_state.forNode(nodeIndex).m_type;
Node& node = at(nodeIndex);
VirtualRegister virtualRegister = node.virtualRegister();
GenerationInfo& info = m_generationInfo[virtualRegister];
switch (info.registerFormat()) {
case DataFormatNone: {
if (node.hasConstant()) {
JSValue jsValue = valueOfJSConstant(nodeIndex);
ASSERT(jsValue.isCell());
GPRReg gpr = allocate();
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
m_jit.move(MacroAssembler::TrustedImmPtr(jsValue.asCell()), gpr);
info.fillCell(*m_stream, gpr);
return gpr;
}
ASSERT((info.spillFormat() & DataFormatJS) || info.spillFormat() == DataFormatCell);
if (!isCellSpeculation(type))
speculationCheckWithConditionalDirection(BadType, JSValueSource(JITCompiler::addressFor(virtualRegister)), nodeIndex, m_jit.branch32(MacroAssembler::NotEqual, JITCompiler::tagFor(virtualRegister), TrustedImm32(JSValue::CellTag)), isForwardSpeculation);
GPRReg gpr = allocate();
m_jit.load32(JITCompiler::payloadFor(virtualRegister), gpr);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
info.fillCell(*m_stream, gpr);
return gpr;
}
case DataFormatCell: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
return gpr;
}
case DataFormatJSCell:
case DataFormatJS: {
GPRReg tagGPR = info.tagGPR();
GPRReg payloadGPR = info.payloadGPR();
m_gprs.lock(tagGPR);
m_gprs.lock(payloadGPR);
if (!isCellSpeculation(type))
speculationCheckWithConditionalDirection(BadType, JSValueRegs(tagGPR, payloadGPR), nodeIndex, m_jit.branch32(MacroAssembler::NotEqual, tagGPR, TrustedImm32(JSValue::CellTag)), isForwardSpeculation);
m_gprs.unlock(tagGPR);
m_gprs.release(tagGPR);
m_gprs.release(payloadGPR);
m_gprs.retain(payloadGPR, virtualRegister, SpillOrderCell);
info.fillCell(*m_stream, payloadGPR);
return payloadGPR;
}
case DataFormatJSInteger:
case DataFormatInteger:
case DataFormatJSDouble:
case DataFormatDouble:
case DataFormatJSBoolean:
case DataFormatBoolean:
case DataFormatStorage:
ASSERT_NOT_REACHED();
default:
ASSERT_NOT_REACHED();
return InvalidGPRReg;
}
}
GPRReg SpeculativeJIT::fillSpeculateBoolean(NodeIndex nodeIndex)
{
#if DFG_ENABLE(DEBUG_VERBOSE)
dataLog("SpecBool@%d ", nodeIndex);
#endif
SpeculatedType type = m_state.forNode(nodeIndex).m_type;
Node& node = m_jit.graph()[nodeIndex];
VirtualRegister virtualRegister = node.virtualRegister();
GenerationInfo& info = m_generationInfo[virtualRegister];
if ((node.hasConstant() && !valueOfJSConstant(nodeIndex).isBoolean())
|| !(info.isJSBoolean() || info.isUnknownJS())) {
terminateSpeculativeExecution(Uncountable, JSValueRegs(), NoNode);
return allocate();
}
switch (info.registerFormat()) {
case DataFormatNone: {
if (node.hasConstant()) {
JSValue jsValue = valueOfJSConstant(nodeIndex);
ASSERT(jsValue.isBoolean());
GPRReg gpr = allocate();
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
m_jit.move(MacroAssembler::TrustedImm32(jsValue.asBoolean()), gpr);
info.fillBoolean(*m_stream, gpr);
return gpr;
}
ASSERT((info.spillFormat() & DataFormatJS) || info.spillFormat() == DataFormatBoolean);
if (!isBooleanSpeculation(type))
speculationCheck(BadType, JSValueSource(JITCompiler::addressFor(virtualRegister)), nodeIndex, m_jit.branch32(MacroAssembler::NotEqual, JITCompiler::tagFor(virtualRegister), TrustedImm32(JSValue::BooleanTag)));
GPRReg gpr = allocate();
m_jit.load32(JITCompiler::payloadFor(virtualRegister), gpr);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
info.fillBoolean(*m_stream, gpr);
return gpr;
}
case DataFormatBoolean: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
return gpr;
}
case DataFormatJSBoolean:
case DataFormatJS: {
GPRReg tagGPR = info.tagGPR();
GPRReg payloadGPR = info.payloadGPR();
m_gprs.lock(tagGPR);
m_gprs.lock(payloadGPR);
if (!isBooleanSpeculation(type))
speculationCheck(BadType, JSValueRegs(tagGPR, payloadGPR), nodeIndex, m_jit.branch32(MacroAssembler::NotEqual, tagGPR, TrustedImm32(JSValue::BooleanTag)));
m_gprs.unlock(tagGPR);
m_gprs.release(tagGPR);
m_gprs.release(payloadGPR);
m_gprs.retain(payloadGPR, virtualRegister, SpillOrderBoolean);
info.fillBoolean(*m_stream, payloadGPR);
return payloadGPR;
}
case DataFormatJSInteger:
case DataFormatInteger:
case DataFormatJSDouble:
case DataFormatDouble:
case DataFormatJSCell:
case DataFormatCell:
case DataFormatStorage:
ASSERT_NOT_REACHED();
default:
ASSERT_NOT_REACHED();
return InvalidGPRReg;
}
}
JITCompiler::Jump SpeculativeJIT::convertToDouble(JSValueOperand& op, FPRReg result)
{
FPRTemporary scratch(this);
JITCompiler::Jump isInteger = m_jit.branch32(MacroAssembler::Equal, op.tagGPR(), TrustedImm32(JSValue::Int32Tag));
JITCompiler::Jump notNumber = m_jit.branch32(MacroAssembler::AboveOrEqual, op.payloadGPR(), TrustedImm32(JSValue::LowestTag));
unboxDouble(op.tagGPR(), op.payloadGPR(), result, scratch.fpr());
JITCompiler::Jump done = m_jit.jump();
isInteger.link(&m_jit);
m_jit.convertInt32ToDouble(op.payloadGPR(), result);
done.link(&m_jit);
return notNumber;
}
void SpeculativeJIT::compileObjectEquality(Node& node)
{
SpeculateCellOperand op1(this, node.child1());
SpeculateCellOperand op2(this, node.child2());
GPRReg op1GPR = op1.gpr();
GPRReg op2GPR = op2.gpr();
if (m_jit.graph().globalObjectFor(node.codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(node.codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), node.child1(),
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(op1GPR, JSCell::structureOffset()),
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueSource::unboxedCell(op2GPR), node.child2(),
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(op2GPR, JSCell::structureOffset()),
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
} else {
GPRTemporary structure(this);
GPRReg structureGPR = structure.gpr();
m_jit.loadPtr(MacroAssembler::Address(op1GPR, JSCell::structureOffset()), structureGPR);
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), node.child1(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), node.child1(),
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(structureGPR, Structure::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined)));
m_jit.loadPtr(MacroAssembler::Address(op2GPR, JSCell::structureOffset()), structureGPR);
speculationCheck(BadType, JSValueSource::unboxedCell(op2GPR), node.child2(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueSource::unboxedCell(op2GPR), node.child2(),
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(structureGPR, Structure::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined)));
}
GPRTemporary resultPayload(this, op2);
GPRReg resultPayloadGPR = resultPayload.gpr();
MacroAssembler::Jump falseCase = m_jit.branchPtr(MacroAssembler::NotEqual, op1GPR, op2GPR);
m_jit.move(TrustedImm32(1), resultPayloadGPR);
MacroAssembler::Jump done = m_jit.jump();
falseCase.link(&m_jit);
m_jit.move(TrustedImm32(0), resultPayloadGPR);
done.link(&m_jit);
booleanResult(resultPayloadGPR, m_compileIndex);
}
void SpeculativeJIT::compileObjectToObjectOrOtherEquality(Edge leftChild, Edge rightChild)
{
Node& leftNode = m_jit.graph()[leftChild.index()];
SpeculateCellOperand op1(this, leftChild);
JSValueOperand op2(this, rightChild);
GPRTemporary result(this);
GPRReg op1GPR = op1.gpr();
GPRReg op2TagGPR = op2.tagGPR();
GPRReg op2PayloadGPR = op2.payloadGPR();
GPRReg resultGPR = result.gpr();
if (m_jit.graph().globalObjectFor(leftNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(leftNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), leftChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(op1GPR, JSCell::structureOffset()),
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
} else {
GPRTemporary structure(this);
GPRReg structureGPR = structure.gpr();
m_jit.loadPtr(MacroAssembler::Address(op1GPR, JSCell::structureOffset()), structureGPR);
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), leftChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), leftChild.index(),
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(structureGPR, Structure::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.branch32(MacroAssembler::NotEqual, op2TagGPR, TrustedImm32(JSValue::CellTag));
// We know that within this branch, rightChild must be a cell.
if (m_jit.graph().globalObjectFor(leftNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(leftNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
speculationCheck(BadType, JSValueRegs(op2TagGPR, op2PayloadGPR), rightChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(op2PayloadGPR, JSCell::structureOffset()),
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
} else {
GPRTemporary structure(this);
GPRReg structureGPR = structure.gpr();
m_jit.loadPtr(MacroAssembler::Address(op2PayloadGPR, JSCell::structureOffset()), structureGPR);
speculationCheck(BadType, JSValueRegs(op2TagGPR, op2PayloadGPR), rightChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueRegs(op2TagGPR, op2PayloadGPR), rightChild.index(),
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(structureGPR, Structure::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.
MacroAssembler::Jump falseCase = m_jit.branchPtr(MacroAssembler::NotEqual, op1GPR, op2PayloadGPR);
MacroAssembler::Jump trueCase = 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 (!isOtherOrEmptySpeculation(m_state.forNode(rightChild).m_type & ~SpecCell)) {
m_jit.move(op2TagGPR, resultGPR);
m_jit.or32(TrustedImm32(1), resultGPR);
speculationCheck(
BadType, JSValueRegs(op2TagGPR, op2PayloadGPR), rightChild.index(),
m_jit.branch32(
MacroAssembler::NotEqual, resultGPR,
MacroAssembler::TrustedImm32(JSValue::NullTag)));
}
falseCase.link(&m_jit);
m_jit.move(TrustedImm32(0), resultGPR);
MacroAssembler::Jump done = m_jit.jump();
trueCase.link(&m_jit);
m_jit.move(TrustedImm32(1), resultGPR);
done.link(&m_jit);
booleanResult(resultGPR, m_compileIndex);
}
void SpeculativeJIT::compilePeepHoleObjectToObjectOrOtherEquality(Edge leftChild, Edge rightChild, NodeIndex branchNodeIndex)
{
Node& branchNode = at(branchNodeIndex);
BlockIndex taken = branchNode.takenBlockIndex();
BlockIndex notTaken = branchNode.notTakenBlockIndex();
SpeculateCellOperand op1(this, leftChild);
JSValueOperand op2(this, rightChild);
GPRTemporary result(this);
GPRReg op1GPR = op1.gpr();
GPRReg op2TagGPR = op2.tagGPR();
GPRReg op2PayloadGPR = op2.payloadGPR();
GPRReg resultGPR = result.gpr();
if (m_jit.graph().globalObjectFor(branchNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(branchNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), leftChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(op1GPR, JSCell::structureOffset()),
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
} else {
GPRTemporary structure(this);
GPRReg structureGPR = structure.gpr();
m_jit.loadPtr(MacroAssembler::Address(op1GPR, JSCell::structureOffset()), structureGPR);
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), leftChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueSource::unboxedCell(op1GPR), leftChild.index(),
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(structureGPR, Structure::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.branch32(MacroAssembler::NotEqual, op2TagGPR, TrustedImm32(JSValue::CellTag));
// We know that within this branch, rightChild must be a cell.
if (m_jit.graph().globalObjectFor(branchNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(branchNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
speculationCheck(BadType, JSValueRegs(op2TagGPR, op2PayloadGPR), rightChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(op2PayloadGPR, JSCell::structureOffset()),
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
} else {
GPRTemporary structure(this);
GPRReg structureGPR = structure.gpr();
m_jit.loadPtr(MacroAssembler::Address(op2PayloadGPR, JSCell::structureOffset()), structureGPR);
speculationCheck(BadType, JSValueRegs(op2TagGPR, op2PayloadGPR), rightChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueRegs(op2TagGPR, op2PayloadGPR), rightChild.index(),
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(structureGPR, Structure::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.
branch32(MacroAssembler::Equal, op1GPR, op2PayloadGPR, 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 (isOtherOrEmptySpeculation(m_state.forNode(rightChild).m_type & ~SpecCell))
rightNotCell.link(&m_jit);
else {
jump(notTaken, ForceJump);
rightNotCell.link(&m_jit);
m_jit.move(op2TagGPR, resultGPR);
m_jit.or32(TrustedImm32(1), resultGPR);
speculationCheck(
BadType, JSValueRegs(op2TagGPR, op2PayloadGPR), rightChild.index(),
m_jit.branch32(
MacroAssembler::NotEqual, resultGPR,
MacroAssembler::TrustedImm32(JSValue::NullTag)));
}
jump(notTaken);
}
void SpeculativeJIT::compileIntegerCompare(Node& node, MacroAssembler::RelationalCondition condition)
{
SpeculateIntegerOperand op1(this, node.child1());
SpeculateIntegerOperand op2(this, node.child2());
GPRTemporary resultPayload(this);
m_jit.compare32(condition, op1.gpr(), op2.gpr(), resultPayload.gpr());
// If we add a DataFormatBool, we should use it here.
booleanResult(resultPayload.gpr(), m_compileIndex);
}
void SpeculativeJIT::compileDoubleCompare(Node& node, MacroAssembler::DoubleCondition condition)
{
SpeculateDoubleOperand op1(this, node.child1());
SpeculateDoubleOperand op2(this, node.child2());
GPRTemporary resultPayload(this);
m_jit.move(TrustedImm32(1), resultPayload.gpr());
MacroAssembler::Jump trueCase = m_jit.branchDouble(condition, op1.fpr(), op2.fpr());
m_jit.move(TrustedImm32(0), resultPayload.gpr());
trueCase.link(&m_jit);
booleanResult(resultPayload.gpr(), m_compileIndex);
}
void SpeculativeJIT::compileValueAdd(Node& node)
{
JSValueOperand op1(this, node.child1());
JSValueOperand op2(this, node.child2());
GPRReg op1TagGPR = op1.tagGPR();
GPRReg op1PayloadGPR = op1.payloadGPR();
GPRReg op2TagGPR = op2.tagGPR();
GPRReg op2PayloadGPR = op2.payloadGPR();
flushRegisters();
GPRResult2 resultTag(this);
GPRResult resultPayload(this);
if (isKnownNotNumber(node.child1().index()) || isKnownNotNumber(node.child2().index()))
callOperation(operationValueAddNotNumber, resultTag.gpr(), resultPayload.gpr(), op1TagGPR, op1PayloadGPR, op2TagGPR, op2PayloadGPR);
else
callOperation(operationValueAdd, resultTag.gpr(), resultPayload.gpr(), op1TagGPR, op1PayloadGPR, op2TagGPR, op2PayloadGPR);
jsValueResult(resultTag.gpr(), resultPayload.gpr(), m_compileIndex);
}
void SpeculativeJIT::compileObjectOrOtherLogicalNot(Edge nodeUse, const ClassInfo* classInfo, bool needSpeculationCheck)
{
JSValueOperand value(this, nodeUse);
GPRTemporary resultPayload(this);
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
GPRReg resultPayloadGPR = resultPayload.gpr();
MacroAssembler::Jump notCell = m_jit.branch32(MacroAssembler::NotEqual, valueTagGPR, TrustedImm32(JSValue::CellTag));
if (needSpeculationCheck)
speculationCheck(BadType, JSValueRegs(valueTagGPR, valuePayloadGPR), nodeUse, m_jit.branchPtr(MacroAssembler::NotEqual, MacroAssembler::Address(valuePayloadGPR, JSCell::classInfoOffset()), MacroAssembler::TrustedImmPtr(classInfo)));
m_jit.move(TrustedImm32(0), resultPayloadGPR);
MacroAssembler::Jump done = m_jit.jump();
notCell.link(&m_jit);
COMPILE_ASSERT((JSValue::UndefinedTag | 1) == JSValue::NullTag, UndefinedTag_OR_1_EQUALS_NullTag);
if (needSpeculationCheck) {
m_jit.move(valueTagGPR, resultPayloadGPR);
m_jit.or32(TrustedImm32(1), resultPayloadGPR);
speculationCheck(BadType, JSValueRegs(valueTagGPR, valuePayloadGPR), nodeUse, m_jit.branch32(MacroAssembler::NotEqual, resultPayloadGPR, TrustedImm32(JSValue::NullTag)));
}
m_jit.move(TrustedImm32(1), resultPayloadGPR);
done.link(&m_jit);
booleanResult(resultPayloadGPR, m_compileIndex);
}
void SpeculativeJIT::compileLogicalNot(Node& node)
{
if (at(node.child1()).shouldSpeculateBoolean()) {
SpeculateBooleanOperand value(this, node.child1());
GPRTemporary result(this, value);
m_jit.xor32(TrustedImm32(1), value.gpr(), result.gpr());
booleanResult(result.gpr(), m_compileIndex);
return;
}
if (at(node.child1()).shouldSpeculateFinalObjectOrOther()) {
compileObjectOrOtherLogicalNot(node.child1(), &JSFinalObject::s_info, !isFinalObjectOrOtherSpeculation(m_state.forNode(node.child1()).m_type));
return;
}
if (at(node.child1()).shouldSpeculateArrayOrOther()) {
compileObjectOrOtherLogicalNot(node.child1(), &JSArray::s_info, !isArrayOrOtherSpeculation(m_state.forNode(node.child1()).m_type));
return;
}
if (at(node.child1()).shouldSpeculateInteger()) {
SpeculateIntegerOperand value(this, node.child1());
GPRTemporary resultPayload(this, value);
m_jit.compare32(MacroAssembler::Equal, value.gpr(), MacroAssembler::TrustedImm32(0), resultPayload.gpr());
booleanResult(resultPayload.gpr(), m_compileIndex);
return;
}
if (at(node.child1()).shouldSpeculateNumber()) {
SpeculateDoubleOperand value(this, node.child1());
FPRTemporary scratch(this);
GPRTemporary resultPayload(this);
m_jit.move(TrustedImm32(0), resultPayload.gpr());
MacroAssembler::Jump nonZero = m_jit.branchDoubleNonZero(value.fpr(), scratch.fpr());
m_jit.move(TrustedImm32(1), resultPayload.gpr());
nonZero.link(&m_jit);
booleanResult(resultPayload.gpr(), m_compileIndex);
return;
}
JSValueOperand arg1(this, node.child1());
GPRTemporary resultPayload(this, arg1, false);
GPRReg arg1TagGPR = arg1.tagGPR();
GPRReg arg1PayloadGPR = arg1.payloadGPR();
GPRReg resultPayloadGPR = resultPayload.gpr();
arg1.use();
JITCompiler::Jump slowCase = m_jit.branch32(JITCompiler::NotEqual, arg1TagGPR, TrustedImm32(JSValue::BooleanTag));
m_jit.move(arg1PayloadGPR, resultPayloadGPR);
addSlowPathGenerator(
slowPathCall(
slowCase, this, dfgConvertJSValueToBoolean, resultPayloadGPR, arg1TagGPR,
arg1PayloadGPR));
m_jit.xor32(TrustedImm32(1), resultPayloadGPR);
booleanResult(resultPayloadGPR, m_compileIndex, UseChildrenCalledExplicitly);
}
void SpeculativeJIT::emitObjectOrOtherBranch(Edge nodeUse, BlockIndex taken, BlockIndex notTaken, const ClassInfo* classInfo, bool needSpeculationCheck)
{
JSValueOperand value(this, nodeUse);
GPRTemporary scratch(this);
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
GPRReg scratchGPR = scratch.gpr();
MacroAssembler::Jump notCell = m_jit.branch32(MacroAssembler::NotEqual, valueTagGPR, TrustedImm32(JSValue::CellTag));
if (needSpeculationCheck)
speculationCheck(BadType, JSValueRegs(valueTagGPR, valuePayloadGPR), nodeUse, m_jit.branchPtr(MacroAssembler::NotEqual, MacroAssembler::Address(valuePayloadGPR, JSCell::classInfoOffset()), MacroAssembler::TrustedImmPtr(classInfo)));
jump(taken, ForceJump);
notCell.link(&m_jit);
COMPILE_ASSERT((JSValue::UndefinedTag | 1) == JSValue::NullTag, UndefinedTag_OR_1_EQUALS_NullTag);
if (needSpeculationCheck) {
m_jit.move(valueTagGPR, scratchGPR);
m_jit.or32(TrustedImm32(1), scratchGPR);
speculationCheck(BadType, JSValueRegs(valueTagGPR, valuePayloadGPR), nodeUse, m_jit.branch32(MacroAssembler::NotEqual, scratchGPR, TrustedImm32(JSValue::NullTag)));
}
jump(notTaken);
noResult(m_compileIndex);
}
void SpeculativeJIT::emitBranch(Node& node)
{
BlockIndex taken = node.takenBlockIndex();
BlockIndex notTaken = node.notTakenBlockIndex();
if (at(node.child1()).shouldSpeculateBoolean()) {
SpeculateBooleanOperand value(this, node.child1());
MacroAssembler::ResultCondition condition = MacroAssembler::NonZero;
if (taken == nextBlock()) {
condition = MacroAssembler::Zero;
BlockIndex tmp = taken;
taken = notTaken;
notTaken = tmp;
}
branchTest32(condition, value.gpr(), TrustedImm32(1), taken);
jump(notTaken);
noResult(m_compileIndex);
} else if (at(node.child1()).shouldSpeculateFinalObjectOrOther()) {
emitObjectOrOtherBranch(node.child1(), taken, notTaken, &JSFinalObject::s_info, !isFinalObjectOrOtherSpeculation(m_state.forNode(node.child1()).m_type));
} else if (at(node.child1()).shouldSpeculateArrayOrOther()) {
emitObjectOrOtherBranch(node.child1(), taken, notTaken, &JSArray::s_info, !isArrayOrOtherSpeculation(m_state.forNode(node.child1()).m_type));
} else if (at(node.child1()).shouldSpeculateNumber()) {
if (at(node.child1()).shouldSpeculateInteger()) {
bool invert = false;
if (taken == nextBlock()) {
invert = true;
BlockIndex tmp = taken;
taken = notTaken;
notTaken = tmp;
}
SpeculateIntegerOperand 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(m_compileIndex);
} else {
JSValueOperand value(this, node.child1());
value.fill();
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
GPRTemporary result(this);
GPRReg resultGPR = result.gpr();
use(node.child1());
JITCompiler::Jump fastPath = m_jit.branch32(JITCompiler::Equal, valueTagGPR, JITCompiler::TrustedImm32(JSValue::Int32Tag));
JITCompiler::Jump slowPath = m_jit.branch32(JITCompiler::NotEqual, valueTagGPR, JITCompiler::TrustedImm32(JSValue::BooleanTag));
fastPath.link(&m_jit);
branchTest32(JITCompiler::Zero, valuePayloadGPR, notTaken);
jump(taken, ForceJump);
slowPath.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(dfgConvertJSValueToBoolean, resultGPR, valueTagGPR, valuePayloadGPR);
silentFillAllRegisters(resultGPR);
branchTest32(JITCompiler::NonZero, resultGPR, taken);
jump(notTaken);
noResult(m_compileIndex, UseChildrenCalledExplicitly);
}
}
void SpeculativeJIT::compile(Node& node)
{
NodeType op = node.op();
switch (op) {
case JSConstant:
initConstantInfo(m_compileIndex);
break;
case PhantomArguments:
// This should never be must-generate.
ASSERT_NOT_REACHED();
// But as a release-mode fall-back make it the empty value.
initConstantInfo(m_compileIndex);
break;
case WeakJSConstant:
m_jit.addWeakReference(node.weakConstant());
initConstantInfo(m_compileIndex);
break;
case GetLocal: {
SpeculatedType prediction = node.variableAccessData()->prediction();
AbstractValue& value = block()->valuesAtHead.operand(node.local());
// If we have no prediction for this local, then don't attempt to compile.
if (prediction == SpecNone) {
terminateSpeculativeExecution(InadequateCoverage, JSValueRegs(), NoNode);
break;
}
if (!node.variableAccessData()->isCaptured()) {
// 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()) {
terminateSpeculativeExecution(InadequateCoverage, JSValueRegs(), NoNode);
break;
}
if (node.variableAccessData()->shouldUseDoubleFormat()) {
FPRTemporary result(this);
m_jit.loadDouble(JITCompiler::addressFor(node.local()), result.fpr());
VirtualRegister virtualRegister = node.virtualRegister();
m_fprs.retain(result.fpr(), virtualRegister, SpillOrderDouble);
m_generationInfo[virtualRegister].initDouble(m_compileIndex, node.refCount(), result.fpr());
break;
}
if (isInt32Speculation(value.m_type)) {
GPRTemporary result(this);
m_jit.load32(JITCompiler::payloadFor(node.local()), result.gpr());
// Like integerResult, 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);
m_generationInfo[virtualRegister].initInteger(m_compileIndex, node.refCount(), result.gpr());
break;
}
if (isCellSpeculation(value.m_type)) {
GPRTemporary result(this);
m_jit.load32(JITCompiler::payloadFor(node.local()), result.gpr());
// Like cellResult, 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, SpillOrderCell);
m_generationInfo[virtualRegister].initCell(m_compileIndex, node.refCount(), result.gpr());
break;
}
if (isBooleanSpeculation(value.m_type)) {
GPRTemporary result(this);
m_jit.load32(JITCompiler::payloadFor(node.local()), result.gpr());
// Like booleanResult, 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, SpillOrderBoolean);
m_generationInfo[virtualRegister].initBoolean(m_compileIndex, node.refCount(), result.gpr());
break;
}
}
GPRTemporary result(this);
GPRTemporary tag(this);
m_jit.load32(JITCompiler::payloadFor(node.local()), result.gpr());
m_jit.load32(JITCompiler::tagFor(node.local()), tag.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);
m_gprs.retain(tag.gpr(), virtualRegister, SpillOrderJS);
DataFormat format;
if (isCellSpeculation(value.m_type)
&& !node.variableAccessData()->isCaptured())
format = DataFormatJSCell;
else
format = DataFormatJS;
m_generationInfo[virtualRegister].initJSValue(m_compileIndex, node.refCount(), tag.gpr(), result.gpr(), format);
break;
}
case GetLocalUnlinked: {
GPRTemporary payload(this);
GPRTemporary tag(this);
m_jit.load32(JITCompiler::payloadFor(node.unlinkedLocal()), payload.gpr());
m_jit.load32(JITCompiler::tagFor(node.unlinkedLocal()), tag.gpr());
jsValueResult(tag.gpr(), payload.gpr(), m_compileIndex);
break;
}
case SetLocal: {
// SetLocal doubles as a hint as to where a node will be stored and
// as a speculation point. So before we speculate make sure that we
// know where the child of this node needs to go in the virtual
// register file.
compileMovHint(node);
// As far as OSR is concerned, we're on the bytecode index corresponding
// to the *next* instruction, since we've already "executed" the
// SetLocal and whatever other DFG Nodes are associated with the same
// bytecode index as the SetLocal.
ASSERT(m_codeOriginForOSR == node.codeOrigin);
Node* nextNode = &at(block()->at(m_indexInBlock + 1));
// But even more oddly, we need to be super careful about the following
// sequence:
//
// a: Foo()
// b: SetLocal(@a)
// c: Flush(@b)
//
// This next piece of crazy takes care of this.
if (nextNode->op() == Flush && nextNode->child1() == m_compileIndex)
nextNode = &at(block()->at(m_indexInBlock + 2));
// Oddly, it's possible for the bytecode index for the next node to be
// equal to ours. This will happen for op_post_inc. And, even more oddly,
// this is just fine. Ordinarily, this wouldn't be fine, since if the
// next node failed OSR then we'd be OSR-ing with this SetLocal's local
// variable already set even though from the standpoint of the old JIT,
// this SetLocal should not have executed. But for op_post_inc, it's just
// fine, because this SetLocal's local (i.e. the LHS in a x = y++
// statement) would be dead anyway - so the fact that DFG would have
// already made the assignment, and baked it into the register file during
// OSR exit, would not be visible to the old JIT in any way.
m_codeOriginForOSR = nextNode->codeOrigin;
if (!node.variableAccessData()->isCaptured() && !m_jit.graph().isCreatedThisArgument(node.local())) {
if (node.variableAccessData()->shouldUseDoubleFormat()) {
SpeculateDoubleOperand value(this, node.child1());
m_jit.storeDouble(value.fpr(), JITCompiler::addressFor(node.local()));
noResult(m_compileIndex);
// Indicate that it's no longer necessary to retrieve the value of
// this bytecode variable from registers or other locations in the register file,
// but that it is stored as a double.
recordSetLocal(node.local(), ValueSource(DoubleInRegisterFile));
break;
}
SpeculatedType predictedType = node.variableAccessData()->argumentAwarePrediction();
if (m_generationInfo[at(node.child1()).virtualRegister()].registerFormat() == DataFormatDouble) {
DoubleOperand value(this, node.child1());
m_jit.storeDouble(value.fpr(), JITCompiler::addressFor(node.local()));
noResult(m_compileIndex);
recordSetLocal(node.local(), ValueSource(DoubleInRegisterFile));
break;
}
if (isInt32Speculation(predictedType)) {
SpeculateIntegerOperand value(this, node.child1());
m_jit.store32(value.gpr(), JITCompiler::payloadFor(node.local()));
noResult(m_compileIndex);
recordSetLocal(node.local(), ValueSource(Int32InRegisterFile));
break;
}
if (isCellSpeculation(predictedType)) {
SpeculateCellOperand cell(this, node.child1());
GPRReg cellGPR = cell.gpr();
m_jit.storePtr(cellGPR, JITCompiler::payloadFor(node.local()));
noResult(m_compileIndex);
recordSetLocal(node.local(), ValueSource(CellInRegisterFile));
break;
}
if (isBooleanSpeculation(predictedType)) {
SpeculateBooleanOperand value(this, node.child1());
m_jit.store32(value.gpr(), JITCompiler::payloadFor(node.local()));
noResult(m_compileIndex);
recordSetLocal(node.local(), ValueSource(BooleanInRegisterFile));
break;
}
}
JSValueOperand value(this, node.child1());
m_jit.store32(value.payloadGPR(), JITCompiler::payloadFor(node.local()));
m_jit.store32(value.tagGPR(), JITCompiler::tagFor(node.local()));
noResult(m_compileIndex);
recordSetLocal(node.local(), ValueSource(ValueInRegisterFile));
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.
break;
case BitAnd:
case BitOr:
case BitXor:
if (isInt32Constant(node.child1().index())) {
SpeculateIntegerOperand op2(this, node.child2());
GPRTemporary result(this, op2);
bitOp(op, valueOfInt32Constant(node.child1().index()), op2.gpr(), result.gpr());
integerResult(result.gpr(), m_compileIndex);
} else if (isInt32Constant(node.child2().index())) {
SpeculateIntegerOperand op1(this, node.child1());
GPRTemporary result(this, op1);
bitOp(op, valueOfInt32Constant(node.child2().index()), op1.gpr(), result.gpr());
integerResult(result.gpr(), m_compileIndex);
} else {
SpeculateIntegerOperand op1(this, node.child1());
SpeculateIntegerOperand op2(this, node.child2());
GPRTemporary result(this, op1, op2);
GPRReg reg1 = op1.gpr();
GPRReg reg2 = op2.gpr();
bitOp(op, reg1, reg2, result.gpr());
integerResult(result.gpr(), m_compileIndex);
}
break;
case BitRShift:
case BitLShift:
case BitURShift:
if (isInt32Constant(node.child2().index())) {
SpeculateIntegerOperand op1(this, node.child1());
GPRTemporary result(this, op1);
shiftOp(op, op1.gpr(), valueOfInt32Constant(node.child2().index()) & 0x1f, result.gpr());
integerResult(result.gpr(), m_compileIndex);
} else {
// Do not allow shift amount to be used as the result, MacroAssembler does not permit this.
SpeculateIntegerOperand op1(this, node.child1());
SpeculateIntegerOperand op2(this, node.child2());
GPRTemporary result(this, op1);
GPRReg reg1 = op1.gpr();
GPRReg reg2 = op2.gpr();
shiftOp(op, reg1, reg2, result.gpr());
integerResult(result.gpr(), m_compileIndex);
}
break;
case UInt32ToNumber: {
compileUInt32ToNumber(node);
break;
}
case DoubleAsInt32: {
compileDoubleAsInt32(node);
break;
}
case ValueToInt32: {
compileValueToInt32(node);
break;
}
case Int32ToDouble: {
compileInt32ToDouble(node);
break;
}
case CheckNumber: {
if (!isNumberSpeculation(m_state.forNode(node.child1()).m_type)) {
JSValueOperand op1(this, node.child1());
JITCompiler::Jump isInteger = m_jit.branch32(MacroAssembler::Equal, op1.tagGPR(), TrustedImm32(JSValue::Int32Tag));
speculationCheck(
BadType, JSValueRegs(op1.tagGPR(), op1.payloadGPR()), node.child1().index(),
m_jit.branch32(MacroAssembler::AboveOrEqual, op1.tagGPR(), TrustedImm32(JSValue::LowestTag)));
isInteger.link(&m_jit);
}
noResult(m_compileIndex);
break;
}
case ValueAdd:
case ArithAdd:
compileAdd(node);
break;
case ArithSub:
compileArithSub(node);
break;
case ArithNegate:
compileArithNegate(node);
break;
case ArithMul:
compileArithMul(node);
break;
case ArithDiv: {
if (Node::shouldSpeculateInteger(at(node.child1()), at(node.child2())) && node.canSpeculateInteger()) {
#if CPU(X86)
compileIntegerArithDivForX86(node);
#else // CPU(X86) -> so non-X86 code follows
ASSERT_NOT_REACHED(); // should have been coverted into a double divide.
#endif // CPU(X86)
break;
}
SpeculateDoubleOperand op1(this, node.child1());
SpeculateDoubleOperand op2(this, node.child2());
FPRTemporary result(this, op1);
FPRReg reg1 = op1.fpr();
FPRReg reg2 = op2.fpr();
m_jit.divDouble(reg1, reg2, result.fpr());
doubleResult(result.fpr(), m_compileIndex);
break;
}
case ArithMod: {
compileArithMod(node);
break;
}
case ArithAbs: {
if (at(node.child1()).shouldSpeculateInteger() && node.canSpeculateInteger()) {
SpeculateIntegerOperand op1(this, node.child1());
GPRTemporary result(this, op1);
GPRTemporary scratch(this);
m_jit.zeroExtend32ToPtr(op1.gpr(), result.gpr());
m_jit.rshift32(result.gpr(), MacroAssembler::TrustedImm32(31), scratch.gpr());
m_jit.add32(scratch.gpr(), result.gpr());
m_jit.xor32(scratch.gpr(), result.gpr());
speculationCheck(Overflow, JSValueRegs(), NoNode, m_jit.branch32(MacroAssembler::Equal, result.gpr(), MacroAssembler::TrustedImm32(1 << 31)));
integerResult(result.gpr(), m_compileIndex);
break;
}
SpeculateDoubleOperand op1(this, node.child1());
FPRTemporary result(this);
m_jit.absDouble(op1.fpr(), result.fpr());
doubleResult(result.fpr(), m_compileIndex);
break;
}
case ArithMin:
case ArithMax: {
if (Node::shouldSpeculateInteger(at(node.child1()), at(node.child2())) && node.canSpeculateInteger()) {
SpeculateStrictInt32Operand op1(this, node.child1());
SpeculateStrictInt32Operand op2(this, node.child2());
GPRTemporary result(this, 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);
integerResult(result.gpr(), m_compileIndex);
break;
}
SpeculateDoubleOperand op1(this, node.child1());
SpeculateDoubleOperand op2(this, node.child2());
FPRTemporary result(this, op1);
MacroAssembler::JumpList done;
MacroAssembler::Jump op1Less = m_jit.branchDouble(op == ArithMin ? MacroAssembler::DoubleLessThan : MacroAssembler::DoubleGreaterThan, op1.fpr(), op2.fpr());
// op2 is eather the lesser one or one of then is NaN
MacroAssembler::Jump op2Less = m_jit.branchDouble(op == ArithMin ? MacroAssembler::DoubleGreaterThanOrEqual : MacroAssembler::DoubleLessThanOrEqual, op1.fpr(), op2.fpr());
// 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(op1.fpr(), op2.fpr(), result.fpr());
done.append(m_jit.jump());
op2Less.link(&m_jit);
m_jit.moveDouble(op2.fpr(), result.fpr());
if (op1.fpr() != result.fpr()) {
done.append(m_jit.jump());
op1Less.link(&m_jit);
m_jit.moveDouble(op1.fpr(), result.fpr());
} else
op1Less.link(&m_jit);
done.link(&m_jit);
doubleResult(result.fpr(), m_compileIndex);
break;
}
case ArithSqrt: {
SpeculateDoubleOperand op1(this, node.child1());
FPRTemporary result(this, op1);
m_jit.sqrtDouble(op1.fpr(), result.fpr());
doubleResult(result.fpr(), m_compileIndex);
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 (isNullConstant(node.child1().index())) {
if (nonSpeculativeCompareNull(node, node.child2()))
return;
break;
}
if (isNullConstant(node.child2().index())) {
if (nonSpeculativeCompareNull(node, node.child1()))
return;
break;
}
if (compare(node, JITCompiler::Equal, JITCompiler::DoubleEqual, operationCompareEq))
return;
break;
case CompareStrictEq:
if (compileStrictEq(node))
return;
break;
case StringCharCodeAt: {
compileGetCharCodeAt(node);
break;
}
case StringCharAt: {
// Relies on StringCharAt node having same basic layout as GetByVal
compileGetByValOnString(node);
break;
}
case CheckArray: {
checkArray(node);
break;
}
case GetByVal: {
switch (node.arrayMode()) {
case Array::Undecided:
case Array::ForceExit:
ASSERT_NOT_REACHED();
terminateSpeculativeExecution(InadequateCoverage, JSValueRegs(), NoNode);
break;
case Array::Generic: {
SpeculateCellOperand base(this, node.child1()); // Save a register, speculate cell. We'll probably be right.
JSValueOperand property(this, node.child2());
GPRReg baseGPR = base.gpr();
GPRReg propertyTagGPR = property.tagGPR();
GPRReg propertyPayloadGPR = property.payloadGPR();
flushRegisters();
GPRResult2 resultTag(this);
GPRResult resultPayload(this);
callOperation(operationGetByValCell, resultTag.gpr(), resultPayload.gpr(), baseGPR, propertyTagGPR, propertyPayloadGPR);
jsValueResult(resultTag.gpr(), resultPayload.gpr(), m_compileIndex);
break;
}
case Array::JSArray:
case Array::JSArrayOutOfBounds: {
SpeculateStrictInt32Operand property(this, node.child2());
StorageOperand storage(this, node.child3());
GPRReg propertyReg = property.gpr();
GPRReg storageReg = storage.gpr();
if (!m_compileOkay)
return;
// Check that base is an array, and that property is contained within m_vector (< m_vectorLength).
// If we have predicted the base to be type array, we can skip the check.
{
SpeculateCellOperand base(this, node.child1());
GPRReg baseReg = base.gpr();
// We've already speculated that it's some kind of array, at this point.
speculationCheck(Uncountable, JSValueRegs(), NoNode, m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(baseReg, JSArray::vectorLengthOffset())));
}
GPRTemporary resultTag(this);
GPRTemporary resultPayload(this);
m_jit.load32(MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), resultTag.gpr());
speculationCheck(Uncountable, JSValueRegs(), NoNode, m_jit.branch32(MacroAssembler::Equal, resultTag.gpr(), TrustedImm32(JSValue::EmptyValueTag)));
m_jit.load32(MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), resultPayload.gpr());
jsValueResult(resultTag.gpr(), resultPayload.gpr(), m_compileIndex);
break;
}
case Array::String:
compileGetByValOnString(node);
break;
case Array::Arguments:
compileGetByValOnArguments(node);
break;
case Array::Int8Array:
compileGetByValOnIntTypedArray(m_jit.globalData()->int8ArrayDescriptor(), node, sizeof(int8_t), SignedTypedArray);
break;
case Array::Int16Array:
compileGetByValOnIntTypedArray(m_jit.globalData()->int16ArrayDescriptor(), node, sizeof(int16_t), SignedTypedArray);
break;
case Array::Int32Array:
compileGetByValOnIntTypedArray(m_jit.globalData()->int32ArrayDescriptor(), node, sizeof(int32_t), SignedTypedArray);
break;
case Array::Uint8Array:
compileGetByValOnIntTypedArray(m_jit.globalData()->uint8ArrayDescriptor(), node, sizeof(uint8_t), UnsignedTypedArray);
break;
case Array::Uint8ClampedArray:
compileGetByValOnIntTypedArray(m_jit.globalData()->uint8ClampedArrayDescriptor(), node, sizeof(uint8_t), UnsignedTypedArray);
break;
case Array::Uint16Array:
compileGetByValOnIntTypedArray(m_jit.globalData()->uint16ArrayDescriptor(), node, sizeof(uint16_t), UnsignedTypedArray);
break;
case Array::Uint32Array:
compileGetByValOnIntTypedArray(m_jit.globalData()->uint32ArrayDescriptor(), node, sizeof(uint32_t), UnsignedTypedArray);
break;
case Array::Float32Array:
compileGetByValOnFloatTypedArray(m_jit.globalData()->float32ArrayDescriptor(), node, sizeof(float));
break;
case Array::Float64Array:
compileGetByValOnFloatTypedArray(m_jit.globalData()->float64ArrayDescriptor(), node, sizeof(double));
break;
default:
ASSERT_NOT_REACHED();
break;
}
break;
}
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);
Array::Mode arrayMode = modeForPut(node.arrayMode());
bool alreadyHandled = false;
switch (arrayMode) {
case Array::Undecided:
case Array::ForceExit:
ASSERT_NOT_REACHED();
terminateSpeculativeExecution(InadequateCoverage, JSValueRegs(), NoNode);
alreadyHandled = true;
break;
case Array::Generic: {
ASSERT(node.op() == PutByVal);
SpeculateCellOperand base(this, child1); // Save a register, speculate cell. We'll probably be right.
JSValueOperand property(this, child2);
JSValueOperand value(this, child3);
GPRReg baseGPR = base.gpr();
GPRReg propertyTagGPR = property.tagGPR();
GPRReg propertyPayloadGPR = property.payloadGPR();
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
flushRegisters();
callOperation(m_jit.codeBlock()->isStrictMode() ? operationPutByValCellStrict : operationPutByValCellNonStrict, baseGPR, propertyTagGPR, propertyPayloadGPR, valueTagGPR, valuePayloadGPR);
noResult(m_compileIndex);
alreadyHandled = true;
break;
}
default:
break;
}
if (alreadyHandled)
break;
SpeculateCellOperand base(this, child1);
SpeculateStrictInt32Operand property(this, child2);
GPRReg baseReg = base.gpr();
GPRReg propertyReg = property.gpr();
switch (arrayMode) {
case Array::JSArray:
case Array::JSArrayOutOfBounds: {
JSValueOperand value(this, child3);
GPRReg valueTagReg = value.tagGPR();
GPRReg valuePayloadReg = value.payloadGPR();
if (!m_compileOkay)
return;
{
GPRTemporary scratch(this);
GPRReg scratchReg = scratch.gpr();
writeBarrier(baseReg, valueTagReg, child3, WriteBarrierForPropertyAccess, scratchReg);
}
StorageOperand storage(this, child4);
GPRReg storageReg = storage.gpr();
if (node.op() == PutByValAlias) {
// Store the value to the array.
GPRReg propertyReg = property.gpr();
m_jit.store32(value.tagGPR(), MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
m_jit.store32(value.payloadGPR(), MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
noResult(m_compileIndex);
break;
}
MacroAssembler::Jump beyondArrayBounds = m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(baseReg, JSArray::vectorLengthOffset()));
if (arrayMode == Array::JSArray)
speculationCheck(OutOfBounds, JSValueRegs(), NoNode, beyondArrayBounds);
base.use();
property.use();
value.use();
storage.use();
// Check if we're writing to a hole; if so increment m_numValuesInVector.
MacroAssembler::Jump notHoleValue = m_jit.branch32(MacroAssembler::NotEqual, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), TrustedImm32(JSValue::EmptyValueTag));
m_jit.add32(TrustedImm32(1), MacroAssembler::Address(storageReg, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
// 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, OBJECT_OFFSETOF(ArrayStorage, m_length)));
m_jit.add32(TrustedImm32(1), propertyReg);
m_jit.store32(propertyReg, MacroAssembler::Address(storageReg, OBJECT_OFFSETOF(ArrayStorage, m_length)));
m_jit.sub32(TrustedImm32(1), propertyReg);
lengthDoesNotNeedUpdate.link(&m_jit);
notHoleValue.link(&m_jit);
// Store the value to the array.
m_jit.store32(valueTagReg, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
m_jit.store32(valuePayloadReg, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
if (arrayMode == Array::JSArrayOutOfBounds) {
addSlowPathGenerator(
slowPathCall(
beyondArrayBounds, this,
m_jit.codeBlock()->isStrictMode() ? operationPutByValBeyondArrayBoundsStrict : operationPutByValBeyondArrayBoundsNonStrict,
NoResult, baseReg, propertyReg, valueTagReg, valuePayloadReg));
}
noResult(m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case Array::Arguments:
// FIXME: we could at some point make this work. Right now we're assuming that the register
// pressure would be too great.
ASSERT_NOT_REACHED();
break;
case Array::Int8Array:
compilePutByValForIntTypedArray(m_jit.globalData()->int8ArrayDescriptor(), base.gpr(), property.gpr(), node, sizeof(int8_t), SignedTypedArray);
break;
case Array::Int16Array:
compilePutByValForIntTypedArray(m_jit.globalData()->int16ArrayDescriptor(), base.gpr(), property.gpr(), node, sizeof(int16_t), SignedTypedArray);
break;
case Array::Int32Array:
compilePutByValForIntTypedArray(m_jit.globalData()->int32ArrayDescriptor(), base.gpr(), property.gpr(), node, sizeof(int32_t), SignedTypedArray);
break;
case Array::Uint8Array:
compilePutByValForIntTypedArray(m_jit.globalData()->uint8ArrayDescriptor(), base.gpr(), property.gpr(), node, sizeof(uint8_t), UnsignedTypedArray);
break;
case Array::Uint8ClampedArray:
compilePutByValForIntTypedArray(m_jit.globalData()->uint8ClampedArrayDescriptor(), base.gpr(), property.gpr(), node, sizeof(uint8_t), UnsignedTypedArray, ClampRounding);
break;
case Array::Uint16Array:
compilePutByValForIntTypedArray(m_jit.globalData()->uint16ArrayDescriptor(), base.gpr(), property.gpr(), node, sizeof(uint16_t), UnsignedTypedArray);
break;
case Array::Uint32Array:
compilePutByValForIntTypedArray(m_jit.globalData()->uint32ArrayDescriptor(), base.gpr(), property.gpr(), node, sizeof(uint32_t), UnsignedTypedArray);
break;
case Array::Float32Array:
compilePutByValForFloatTypedArray(m_jit.globalData()->float32ArrayDescriptor(), base.gpr(), property.gpr(), node, sizeof(float));
break;
case Array::Float64Array:
compilePutByValForFloatTypedArray(m_jit.globalData()->float64ArrayDescriptor(), base.gpr(), property.gpr(), node, sizeof(double));
break;
default:
ASSERT_NOT_REACHED();
break;
}
break;
}
case RegExpExec: {
if (compileRegExpExec(node))
return;
if (!node.adjustedRefCount()) {
SpeculateCellOperand base(this, node.child1());
SpeculateCellOperand argument(this, node.child2());
GPRReg baseGPR = base.gpr();
GPRReg argumentGPR = argument.gpr();
flushRegisters();
GPRResult result(this);
callOperation(operationRegExpTest, result.gpr(), baseGPR, argumentGPR);
// Must use jsValueResult because otherwise we screw up register
// allocation, which thinks that this node has a result.
booleanResult(result.gpr(), m_compileIndex);
break;
}
SpeculateCellOperand base(this, node.child1());
SpeculateCellOperand argument(this, node.child2());
GPRReg baseGPR = base.gpr();
GPRReg argumentGPR = argument.gpr();
flushRegisters();
GPRResult2 resultTag(this);
GPRResult resultPayload(this);
callOperation(operationRegExpExec, resultTag.gpr(), resultPayload.gpr(), baseGPR, argumentGPR);
jsValueResult(resultTag.gpr(), resultPayload.gpr(), m_compileIndex);
break;
}
case RegExpTest: {
SpeculateCellOperand base(this, node.child1());
SpeculateCellOperand argument(this, node.child2());
GPRReg baseGPR = base.gpr();
GPRReg argumentGPR = argument.gpr();
flushRegisters();
GPRResult result(this);
callOperation(operationRegExpTest, result.gpr(), baseGPR, argumentGPR);
// If we add a DataFormatBool, we should use it here.
booleanResult(result.gpr(), m_compileIndex);
break;
}
case ArrayPush: {
ASSERT(modeIsJSArray(node.arrayMode()));
SpeculateCellOperand base(this, node.child1());
JSValueOperand value(this, node.child2());
GPRTemporary storageLength(this);
GPRReg baseGPR = base.gpr();
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
GPRReg storageLengthGPR = storageLength.gpr();
if (Heap::isWriteBarrierEnabled()) {
GPRTemporary scratch(this);
writeBarrier(baseGPR, valueTagGPR, node.child2(), WriteBarrierForPropertyAccess, scratch.gpr(), storageLengthGPR);
}
StorageOperand storage(this, node.child3());
GPRReg storageGPR = storage.gpr();
m_jit.load32(MacroAssembler::Address(storageGPR, OBJECT_OFFSETOF(ArrayStorage, m_length)), storageLengthGPR);
// Refuse to handle bizarre lengths.
speculationCheck(Uncountable, JSValueRegs(), NoNode, m_jit.branch32(MacroAssembler::Above, storageLengthGPR, TrustedImm32(0x7ffffffe)));
MacroAssembler::Jump slowPath = m_jit.branch32(MacroAssembler::AboveOrEqual, storageLengthGPR, MacroAssembler::Address(baseGPR, JSArray::vectorLengthOffset()));
m_jit.store32(valueTagGPR, MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
m_jit.store32(valuePayloadGPR, MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)));
m_jit.add32(TrustedImm32(1), storageLengthGPR);
m_jit.store32(storageLengthGPR, MacroAssembler::Address(storageGPR, OBJECT_OFFSETOF(ArrayStorage, m_length)));
m_jit.add32(TrustedImm32(1), MacroAssembler::Address(storageGPR, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
m_jit.move(TrustedImm32(JSValue::Int32Tag), storageGPR);
addSlowPathGenerator(slowPathCall(slowPath, this, operationArrayPush, JSValueRegs(storageGPR, storageLengthGPR), valueTagGPR, valuePayloadGPR, baseGPR));
jsValueResult(storageGPR, storageLengthGPR, m_compileIndex);
break;
}
case ArrayPop: {
ASSERT(modeIsJSArray(node.arrayMode()));
SpeculateCellOperand base(this, node.child1());
StorageOperand storage(this, node.child2());
GPRTemporary valueTag(this);
GPRTemporary valuePayload(this);
GPRTemporary storageLength(this);
GPRReg baseGPR = base.gpr();
GPRReg valueTagGPR = valueTag.gpr();
GPRReg valuePayloadGPR = valuePayload.gpr();
GPRReg storageGPR = storage.gpr();
GPRReg storageLengthGPR = storageLength.gpr();
m_jit.load32(MacroAssembler::Address(storageGPR, OBJECT_OFFSETOF(ArrayStorage, m_length)), storageLengthGPR);
JITCompiler::JumpList setUndefinedCases;
setUndefinedCases.append(m_jit.branchTest32(MacroAssembler::Zero, storageLengthGPR));
m_jit.sub32(TrustedImm32(1), storageLengthGPR);
MacroAssembler::Jump slowCase = m_jit.branch32(MacroAssembler::AboveOrEqual, storageLengthGPR, MacroAssembler::Address(baseGPR, JSArray::vectorLengthOffset()));
m_jit.load32(MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)), valueTagGPR);
m_jit.load32(MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.payload)), valuePayloadGPR);
m_jit.store32(storageLengthGPR, MacroAssembler::Address(storageGPR, OBJECT_OFFSETOF(ArrayStorage, m_length)));
setUndefinedCases.append(m_jit.branch32(MacroAssembler::Equal, TrustedImm32(JSValue::EmptyValueTag), valueTagGPR));
m_jit.store32(TrustedImm32(JSValue::EmptyValueTag), MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::TimesEight, OBJECT_OFFSETOF(ArrayStorage, m_vector[0]) + OBJECT_OFFSETOF(JSValue, u.asBits.tag)));
m_jit.sub32(TrustedImm32(1), MacroAssembler::Address(storageGPR, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
addSlowPathGenerator(
slowPathMove(
setUndefinedCases, this,
MacroAssembler::TrustedImm32(jsUndefined().tag()), valueTagGPR,
MacroAssembler::TrustedImm32(jsUndefined().payload()), valuePayloadGPR));
addSlowPathGenerator(
slowPathCall(
slowCase, this, operationArrayPop,
JSValueRegs(valueTagGPR, valuePayloadGPR), baseGPR));
jsValueResult(valueTagGPR, valuePayloadGPR, m_compileIndex);
break;
}
case DFG::Jump: {
BlockIndex taken = node.takenBlockIndex();
jump(taken);
noResult(m_compileIndex);
break;
}
case Branch:
if (at(node.child1()).shouldSpeculateInteger()) {
SpeculateIntegerOperand op(this, node.child1());
BlockIndex taken = node.takenBlockIndex();
BlockIndex notTaken = node.notTakenBlockIndex();
MacroAssembler::ResultCondition condition = MacroAssembler::NonZero;
if (taken == nextBlock()) {
condition = MacroAssembler::Zero;
BlockIndex tmp = taken;
taken = notTaken;
notTaken = tmp;
}
branchTest32(condition, op.gpr(), taken);
jump(notTaken);
noResult(m_compileIndex);
break;
}
emitBranch(node);
break;
case Return: {
ASSERT(GPRInfo::callFrameRegister != GPRInfo::regT2);
ASSERT(GPRInfo::regT1 != GPRInfo::returnValueGPR);
ASSERT(GPRInfo::returnValueGPR != GPRInfo::callFrameRegister);
#if DFG_ENABLE(SUCCESS_STATS)
static SamplingCounter counter("SpeculativeJIT");
m_jit.emitCount(counter);
#endif
// Return the result in returnValueGPR.
JSValueOperand op1(this, node.child1());
op1.fill();
if (op1.isDouble())
boxDouble(op1.fpr(), GPRInfo::returnValueGPR2, GPRInfo::returnValueGPR);
else {
if (op1.payloadGPR() == GPRInfo::returnValueGPR2 && op1.tagGPR() == GPRInfo::returnValueGPR)
m_jit.swap(GPRInfo::returnValueGPR, GPRInfo::returnValueGPR2);
else if (op1.payloadGPR() == GPRInfo::returnValueGPR2) {
m_jit.move(op1.payloadGPR(), GPRInfo::returnValueGPR);
m_jit.move(op1.tagGPR(), GPRInfo::returnValueGPR2);
} else {
m_jit.move(op1.tagGPR(), GPRInfo::returnValueGPR2);
m_jit.move(op1.payloadGPR(), GPRInfo::returnValueGPR);
}
}
// Grab the return address.
m_jit.emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, GPRInfo::regT2);
// Restore our caller's "r".
m_jit.emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, GPRInfo::callFrameRegister);
// Return.
m_jit.restoreReturnAddressBeforeReturn(GPRInfo::regT2);
m_jit.ret();
noResult(m_compileIndex);
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(), NoNode);
break;
}
case ToPrimitive: {
if (at(node.child1()).shouldSpeculateInteger()) {
// It's really profitable to speculate integer, since it's really cheap,
// it means we don't have to do any real work, and we emit a lot less code.
SpeculateIntegerOperand op1(this, node.child1());
GPRTemporary result(this, op1);
ASSERT(op1.format() == DataFormatInteger);
m_jit.move(op1.gpr(), result.gpr());
integerResult(result.gpr(), m_compileIndex);
break;
}
// FIXME: Add string speculation here.
JSValueOperand op1(this, node.child1());
GPRTemporary resultTag(this, op1);
GPRTemporary resultPayload(this, op1, false);
GPRReg op1TagGPR = op1.tagGPR();
GPRReg op1PayloadGPR = op1.payloadGPR();
GPRReg resultTagGPR = resultTag.gpr();
GPRReg resultPayloadGPR = resultPayload.gpr();
op1.use();
if (!(m_state.forNode(node.child1()).m_type & ~(SpecNumber | SpecBoolean))) {
m_jit.move(op1TagGPR, resultTagGPR);
m_jit.move(op1PayloadGPR, resultPayloadGPR);
} else {
MacroAssembler::Jump alreadyPrimitive = m_jit.branch32(MacroAssembler::NotEqual, op1TagGPR, TrustedImm32(JSValue::CellTag));
MacroAssembler::Jump notPrimitive = m_jit.branchPtr(MacroAssembler::NotEqual, MacroAssembler::Address(op1PayloadGPR, JSCell::structureOffset()), MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get()));
alreadyPrimitive.link(&m_jit);
m_jit.move(op1TagGPR, resultTagGPR);
m_jit.move(op1PayloadGPR, resultPayloadGPR);
addSlowPathGenerator(
slowPathCall(
notPrimitive, this, operationToPrimitive,
JSValueRegs(resultTagGPR, resultPayloadGPR), op1TagGPR, op1PayloadGPR));
}
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case StrCat: {
size_t scratchSize = sizeof(EncodedJSValue) * node.numChildren();
ScratchBuffer* scratchBuffer = m_jit.globalData()->scratchBufferForSize(scratchSize);
EncodedJSValue* buffer = scratchBuffer ? static_cast<EncodedJSValue*>(scratchBuffer->dataBuffer()) : 0;
for (unsigned operandIdx = 0; operandIdx < node.numChildren(); ++operandIdx) {
JSValueOperand operand(this, m_jit.graph().m_varArgChildren[node.firstChild() + operandIdx]);
GPRReg opTagGPR = operand.tagGPR();
GPRReg opPayloadGPR = operand.payloadGPR();
operand.use();
m_jit.store32(opTagGPR, reinterpret_cast<char*>(buffer + operandIdx) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag));
m_jit.store32(opPayloadGPR, reinterpret_cast<char*>(buffer + operandIdx) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload));
}
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());
}
GPRResult resultPayload(this);
GPRResult2 resultTag(this);
callOperation(operationStrCat, resultTag.gpr(), resultPayload.gpr(), static_cast<void *>(buffer), node.numChildren());
if (scratchSize) {
GPRTemporary scratch(this);
m_jit.move(TrustedImmPtr(scratchBuffer->activeLengthPtr()), scratch.gpr());
m_jit.storePtr(TrustedImmPtr(0), scratch.gpr());
}
// FIXME: make the callOperation above explicitly return a cell result, or jitAssert the tag is a cell tag.
cellResult(resultPayload.gpr(), m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case NewArray: {
if (!node.numChildren()) {
flushRegisters();
GPRResult result(this);
GPRResult2 resultTagIgnored(this);
callOperation(
operationNewEmptyArray, resultTagIgnored.gpr(), result.gpr(),
m_jit.graph().globalObjectFor(node.codeOrigin)->arrayStructure());
cellResult(result.gpr(), m_compileIndex);
break;
}
size_t scratchSize = sizeof(EncodedJSValue) * node.numChildren();
ScratchBuffer* scratchBuffer = m_jit.globalData()->scratchBufferForSize(scratchSize);
EncodedJSValue* buffer = scratchBuffer ? static_cast<EncodedJSValue*>(scratchBuffer->dataBuffer()) : 0;
for (unsigned operandIdx = 0; operandIdx < node.numChildren(); ++operandIdx) {
JSValueOperand operand(this, m_jit.graph().m_varArgChildren[node.firstChild() + operandIdx]);
GPRReg opTagGPR = operand.tagGPR();
GPRReg opPayloadGPR = operand.payloadGPR();
operand.use();
m_jit.store32(opTagGPR, reinterpret_cast<char*>(buffer + operandIdx) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag));
m_jit.store32(opPayloadGPR, reinterpret_cast<char*>(buffer + operandIdx) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload));
}
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());
}
GPRResult resultPayload(this);
GPRResult2 resultTag(this);
callOperation(
operationNewArray, resultTag.gpr(), resultPayload.gpr(),
m_jit.graph().globalObjectFor(node.codeOrigin)->arrayStructure(),
static_cast<void *>(buffer), node.numChildren());
if (scratchSize) {
GPRTemporary scratch(this);
m_jit.move(TrustedImmPtr(scratchBuffer->activeLengthPtr()), scratch.gpr());
m_jit.storePtr(TrustedImmPtr(0), scratch.gpr());
}
// FIXME: make the callOperation above explicitly return a cell result, or jitAssert the tag is a cell tag.
cellResult(resultPayload.gpr(), m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case NewArrayWithSize: {
SpeculateStrictInt32Operand size(this, node.child1());
GPRReg sizeGPR = size.gpr();
flushRegisters();
GPRResult result(this);
GPRResult2 resultTagIgnored(this);
callOperation(
operationNewArrayWithSize, resultTagIgnored.gpr(), result.gpr(),
m_jit.graph().globalObjectFor(node.codeOrigin)->arrayStructure(), sizeGPR);
cellResult(result.gpr(), m_compileIndex);
break;
}
case NewArrayBuffer: {
flushRegisters();
GPRResult resultPayload(this);
GPRResult2 resultTag(this);
callOperation(operationNewArrayBuffer, resultTag.gpr(), resultPayload.gpr(), node.startConstant(), node.numConstants());
// FIXME: make the callOperation above explicitly return a cell result, or jitAssert the tag is a cell tag.
cellResult(resultPayload.gpr(), m_compileIndex);
break;
}
case NewRegexp: {
flushRegisters();
GPRResult resultPayload(this);
GPRResult2 resultTag(this);
callOperation(operationNewRegexp, resultTag.gpr(), resultPayload.gpr(), m_jit.codeBlock()->regexp(node.regexpIndex()));
// FIXME: make the callOperation above explicitly return a cell result, or jitAssert the tag is a cell tag.
cellResult(resultPayload.gpr(), m_compileIndex);
break;
}
case ConvertThis: {
if (isObjectSpeculation(m_state.forNode(node.child1()).m_type)) {
SpeculateCellOperand thisValue(this, node.child1());
GPRTemporary result(this, thisValue);
m_jit.move(thisValue.gpr(), result.gpr());
cellResult(result.gpr(), m_compileIndex);
break;
}
if (isOtherSpeculation(at(node.child1()).prediction())) {
JSValueOperand thisValue(this, node.child1());
GPRTemporary scratch(this);
GPRReg thisValueTagGPR = thisValue.tagGPR();
GPRReg scratchGPR = scratch.gpr();
COMPILE_ASSERT((JSValue::UndefinedTag | 1) == JSValue::NullTag, UndefinedTag_OR_1_EQUALS_NullTag);
m_jit.move(thisValueTagGPR, scratchGPR);
m_jit.or32(TrustedImm32(1), scratchGPR);
// This is hard. It would be better to save the value, but we can't quite do it,
// since this operation does not otherwise get the payload.
speculationCheck(BadType, JSValueRegs(), NoNode, m_jit.branch32(MacroAssembler::NotEqual, scratchGPR, TrustedImm32(JSValue::NullTag)));
m_jit.move(MacroAssembler::TrustedImmPtr(m_jit.globalThisObjectFor(node.codeOrigin)), scratchGPR);
cellResult(scratchGPR, m_compileIndex);
break;
}
if (isObjectSpeculation(at(node.child1()).prediction())) {
SpeculateCellOperand thisValue(this, node.child1());
GPRReg thisValueGPR = thisValue.gpr();
if (!isObjectSpeculation(m_state.forNode(node.child1()).m_type))
speculationCheck(BadType, JSValueSource::unboxedCell(thisValueGPR), node.child1(), m_jit.branchPtr(JITCompiler::Equal, JITCompiler::Address(thisValueGPR, JSCell::structureOffset()), JITCompiler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
GPRTemporary result(this, thisValue);
GPRReg resultGPR = result.gpr();
m_jit.move(thisValueGPR, resultGPR);
cellResult(resultGPR, m_compileIndex);
break;
}
JSValueOperand thisValue(this, node.child1());
GPRReg thisValueTagGPR = thisValue.tagGPR();
GPRReg thisValuePayloadGPR = thisValue.payloadGPR();
flushRegisters();
GPRResult2 resultTag(this);
GPRResult resultPayload(this);
callOperation(operationConvertThis, resultTag.gpr(), resultPayload.gpr(), thisValueTagGPR, thisValuePayloadGPR);
cellResult(resultPayload.gpr(), m_compileIndex);
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 scratch(this);
GPRReg calleeGPR = callee.gpr();
GPRReg resultGPR = result.gpr();
GPRReg scratchGPR = scratch.gpr();
// Load the inheritorID. If the inheritorID is not set, go to slow path.
m_jit.loadPtr(MacroAssembler::Address(calleeGPR, JSFunction::offsetOfCachedInheritorID()), scratchGPR);
MacroAssembler::JumpList slowPath;
slowPath.append(m_jit.branchTestPtr(MacroAssembler::Zero, scratchGPR));
emitAllocateJSFinalObject(scratchGPR, resultGPR, scratchGPR, slowPath);
addSlowPathGenerator(slowPathCall(slowPath, this, operationCreateThis, resultGPR, calleeGPR));
cellResult(resultGPR, m_compileIndex);
break;
}
case NewObject: {
GPRTemporary result(this);
GPRTemporary scratch(this);
GPRReg resultGPR = result.gpr();
GPRReg scratchGPR = scratch.gpr();
MacroAssembler::JumpList slowPath;
emitAllocateJSFinalObject(MacroAssembler::TrustedImmPtr(m_jit.globalObjectFor(node.codeOrigin)->emptyObjectStructure()), resultGPR, scratchGPR, slowPath);
addSlowPathGenerator(slowPathCall(slowPath, this, operationNewObject, resultGPR));
cellResult(resultGPR, m_compileIndex);
break;
}
case GetCallee: {
GPRTemporary result(this);
m_jit.loadPtr(JITCompiler::addressFor(static_cast<VirtualRegister>(RegisterFile::Callee)), result.gpr());
cellResult(result.gpr(), m_compileIndex);
break;
}
case GetScopeChain: {
GPRTemporary result(this);
GPRReg resultGPR = result.gpr();
m_jit.loadPtr(JITCompiler::addressFor(static_cast<VirtualRegister>(RegisterFile::ScopeChain)), resultGPR);
bool checkTopLevel = m_jit.codeBlock()->codeType() == FunctionCode && m_jit.codeBlock()->needsFullScopeChain();
int skip = node.scopeChainDepth();
ASSERT(skip || !checkTopLevel);
if (checkTopLevel && skip--) {
JITCompiler::Jump activationNotCreated;
if (checkTopLevel)
activationNotCreated = m_jit.branchTestPtr(JITCompiler::Zero, JITCompiler::addressFor(static_cast<VirtualRegister>(m_jit.codeBlock()->activationRegister())));
m_jit.loadPtr(JITCompiler::Address(resultGPR, JSScope::offsetOfNext()), resultGPR);
activationNotCreated.link(&m_jit);
}
while (skip--)
m_jit.loadPtr(JITCompiler::Address(resultGPR, JSScope::offsetOfNext()), resultGPR);
cellResult(resultGPR, m_compileIndex);
break;
}
case GetScopedVar: {
SpeculateCellOperand scope(this, node.child1());
GPRTemporary resultTag(this);
GPRTemporary resultPayload(this);
GPRReg resultTagGPR = resultTag.gpr();
GPRReg resultPayloadGPR = resultPayload.gpr();
m_jit.loadPtr(JITCompiler::Address(scope.gpr(), JSVariableObject::offsetOfRegisters()), resultPayloadGPR);
m_jit.load32(JITCompiler::Address(resultPayloadGPR, node.varNumber() * sizeof(Register) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)), resultTagGPR);
m_jit.load32(JITCompiler::Address(resultPayloadGPR, node.varNumber() * sizeof(Register) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)), resultPayloadGPR);
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex);
break;
}
case PutScopedVar: {
SpeculateCellOperand scope(this, node.child1());
GPRTemporary scratchRegister(this);
GPRReg scratchGPR = scratchRegister.gpr();
m_jit.loadPtr(JITCompiler::Address(scope.gpr(), JSVariableObject::offsetOfRegisters()), scratchGPR);
JSValueOperand value(this, node.child2());
m_jit.store32(value.tagGPR(), JITCompiler::Address(scratchGPR, node.varNumber() * sizeof(Register) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)));
m_jit.store32(value.payloadGPR(), JITCompiler::Address(scratchGPR, node.varNumber() * sizeof(Register) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)));
writeBarrier(scope.gpr(), value.tagGPR(), node.child2(), WriteBarrierForVariableAccess, scratchGPR);
noResult(m_compileIndex);
break;
}
case GetById: {
if (!node.prediction()) {
terminateSpeculativeExecution(InadequateCoverage, JSValueRegs(), NoNode);
break;
}
if (isCellSpeculation(at(node.child1()).prediction())) {
SpeculateCellOperand base(this, node.child1());
GPRTemporary resultTag(this, base);
GPRTemporary resultPayload(this);
GPRReg baseGPR = base.gpr();
GPRReg resultTagGPR = resultTag.gpr();
GPRReg resultPayloadGPR = resultPayload.gpr();
base.use();
cachedGetById(node.codeOrigin, InvalidGPRReg, baseGPR, resultTagGPR, resultPayloadGPR, node.identifierNumber());
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex, UseChildrenCalledExplicitly);
break;
}
JSValueOperand base(this, node.child1());
GPRTemporary resultTag(this, base);
GPRTemporary resultPayload(this);
GPRReg baseTagGPR = base.tagGPR();
GPRReg basePayloadGPR = base.payloadGPR();
GPRReg resultTagGPR = resultTag.gpr();
GPRReg resultPayloadGPR = resultPayload.gpr();
base.use();
JITCompiler::Jump notCell = m_jit.branch32(JITCompiler::NotEqual, baseTagGPR, TrustedImm32(JSValue::CellTag));
cachedGetById(node.codeOrigin, baseTagGPR, basePayloadGPR, resultTagGPR, resultPayloadGPR, node.identifierNumber(), notCell);
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case GetByIdFlush: {
if (!node.prediction()) {
terminateSpeculativeExecution(InadequateCoverage, JSValueRegs(), NoNode);
break;
}
if (isCellSpeculation(at(node.child1()).prediction())) {
SpeculateCellOperand base(this, node.child1());
GPRReg baseGPR = base.gpr();
GPRResult resultTag(this);
GPRResult2 resultPayload(this);
GPRReg resultTagGPR = resultTag.gpr();
GPRReg resultPayloadGPR = resultPayload.gpr();
base.use();
flushRegisters();
cachedGetById(node.codeOrigin, InvalidGPRReg, baseGPR, resultTagGPR, resultPayloadGPR, node.identifierNumber(), JITCompiler::Jump(), DontSpill);
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex, UseChildrenCalledExplicitly);
break;
}
JSValueOperand base(this, node.child1());
GPRReg baseTagGPR = base.tagGPR();
GPRReg basePayloadGPR = base.payloadGPR();
GPRResult resultTag(this);
GPRResult2 resultPayload(this);
GPRReg resultTagGPR = resultTag.gpr();
GPRReg resultPayloadGPR = resultPayload.gpr();
base.use();
flushRegisters();
JITCompiler::Jump notCell = m_jit.branch32(JITCompiler::NotEqual, baseTagGPR, TrustedImm32(JSValue::CellTag));
cachedGetById(node.codeOrigin, baseTagGPR, basePayloadGPR, resultTagGPR, resultPayloadGPR, node.identifierNumber(), notCell, DontSpill);
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case GetArrayLength:
compileGetArrayLength(node);
break;
case CheckFunction: {
SpeculateCellOperand function(this, node.child1());
speculationCheck(BadCache, JSValueRegs(), NoNode, m_jit.branchWeakPtr(JITCompiler::NotEqual, function.gpr(), node.function()));
noResult(m_compileIndex);
break;
}
case CheckStructure:
case ForwardCheckStructure: {
AbstractValue& value = m_state.forNode(node.child1());
if (value.m_currentKnownStructure.isSubsetOf(node.structureSet())
&& isCellSpeculation(value.m_type)) {
noResult(m_compileIndex);
break;
}
SpeculateCellOperand base(this, node.child1(), node.op() == ForwardCheckStructure);
ASSERT(node.structureSet().size());
if (node.structureSet().size() == 1) {
speculationCheckWithConditionalDirection(
BadCache, JSValueRegs(), NoNode,
m_jit.branchWeakPtr(
JITCompiler::NotEqual,
JITCompiler::Address(base.gpr(), JSCell::structureOffset()),
node.structureSet()[0]),
node.op() == ForwardCheckStructure);
} else {
GPRTemporary structure(this);
m_jit.loadPtr(JITCompiler::Address(base.gpr(), JSCell::structureOffset()), structure.gpr());
JITCompiler::JumpList done;
for (size_t i = 0; i < node.structureSet().size() - 1; ++i)
done.append(m_jit.branchWeakPtr(JITCompiler::Equal, structure.gpr(), node.structureSet()[i]));
speculationCheckWithConditionalDirection(
BadCache, JSValueRegs(), NoNode,
m_jit.branchWeakPtr(
JITCompiler::NotEqual, structure.gpr(), node.structureSet().last()),
node.op() == ForwardCheckStructure);
done.link(&m_jit);
}
noResult(m_compileIndex);
break;
}
case StructureTransitionWatchpoint:
case ForwardStructureTransitionWatchpoint: {
m_jit.addWeakReference(node.structure());
node.structure()->addTransitionWatchpoint(
speculationWatchpointWithConditionalDirection(
BadCache, node.op() == ForwardStructureTransitionWatchpoint));
#if !ASSERT_DISABLED
SpeculateCellOperand op1(this, node.child1());
JITCompiler::Jump isOK = m_jit.branchPtr(JITCompiler::Equal, JITCompiler::Address(op1.gpr(), JSCell::structureOffset()), TrustedImmPtr(node.structure()));
m_jit.breakpoint();
isOK.link(&m_jit);
#endif
noResult(m_compileIndex);
break;
}
case PhantomPutStructure: {
ASSERT(node.structureTransitionData().previousStructure->transitionWatchpointSetHasBeenInvalidated());
m_jit.addWeakReferenceTransition(
node.codeOrigin.codeOriginOwner(),
node.structureTransitionData().previousStructure,
node.structureTransitionData().newStructure);
noResult(m_compileIndex);
break;
}
case PutStructure: {
ASSERT(node.structureTransitionData().previousStructure->transitionWatchpointSetHasBeenInvalidated());
SpeculateCellOperand base(this, node.child1());
GPRReg baseGPR = base.gpr();
m_jit.addWeakReferenceTransition(
node.codeOrigin.codeOriginOwner(),
node.structureTransitionData().previousStructure,
node.structureTransitionData().newStructure);
#if ENABLE(GGC) || ENABLE(WRITE_BARRIER_PROFILING)
// Must always emit this write barrier as the structure transition itself requires it
writeBarrier(baseGPR, node.structureTransitionData().newStructure, WriteBarrierForGenericAccess);
#endif
m_jit.storePtr(MacroAssembler::TrustedImmPtr(node.structureTransitionData().newStructure), MacroAssembler::Address(baseGPR, JSCell::structureOffset()));
noResult(m_compileIndex);
break;
}
case AllocatePropertyStorage:
compileAllocatePropertyStorage(node);
break;
case ReallocatePropertyStorage:
compileReallocatePropertyStorage(node);
break;
case GetPropertyStorage: {
SpeculateCellOperand base(this, node.child1());
GPRTemporary result(this, base);
GPRReg baseGPR = base.gpr();
GPRReg resultGPR = result.gpr();
m_jit.loadPtr(JITCompiler::Address(baseGPR, JSObject::offsetOfOutOfLineStorage()), resultGPR);
storageResult(resultGPR, m_compileIndex);
break;
}
case GetIndexedPropertyStorage: {
compileGetIndexedPropertyStorage(node);
break;
}
case GetByOffset: {
StorageOperand storage(this, node.child1());
GPRTemporary resultTag(this, storage);
GPRTemporary resultPayload(this);
GPRReg storageGPR = storage.gpr();
GPRReg resultTagGPR = resultTag.gpr();
GPRReg resultPayloadGPR = resultPayload.gpr();
StorageAccessData& storageAccessData = m_jit.graph().m_storageAccessData[node.storageAccessDataIndex()];
m_jit.load32(JITCompiler::Address(storageGPR, storageAccessData.offset * sizeof(EncodedJSValue) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)), resultPayloadGPR);
m_jit.load32(JITCompiler::Address(storageGPR, storageAccessData.offset * sizeof(EncodedJSValue) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)), resultTagGPR);
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex);
break;
}
case PutByOffset: {
#if ENABLE(GGC) || ENABLE(WRITE_BARRIER_PROFILING)
SpeculateCellOperand base(this, node.child2());
#endif
StorageOperand storage(this, node.child1());
JSValueOperand value(this, node.child3());
GPRReg storageGPR = storage.gpr();
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
#if ENABLE(GGC) || ENABLE(WRITE_BARRIER_PROFILING)
writeBarrier(base.gpr(), valueTagGPR, node.child3(), WriteBarrierForPropertyAccess);
#endif
StorageAccessData& storageAccessData = m_jit.graph().m_storageAccessData[node.storageAccessDataIndex()];
m_jit.storePtr(valueTagGPR, JITCompiler::Address(storageGPR, storageAccessData.offset * sizeof(EncodedJSValue) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)));
m_jit.storePtr(valuePayloadGPR, JITCompiler::Address(storageGPR, storageAccessData.offset * sizeof(EncodedJSValue) + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)));
noResult(m_compileIndex);
break;
}
case PutById: {
SpeculateCellOperand base(this, node.child1());
JSValueOperand value(this, node.child2());
GPRTemporary scratch(this);
GPRReg baseGPR = base.gpr();
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
GPRReg scratchGPR = scratch.gpr();
base.use();
value.use();
cachedPutById(node.codeOrigin, baseGPR, valueTagGPR, valuePayloadGPR, node.child2(), scratchGPR, node.identifierNumber(), NotDirect);
noResult(m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case PutByIdDirect: {
SpeculateCellOperand base(this, node.child1());
JSValueOperand value(this, node.child2());
GPRTemporary scratch(this);
GPRReg baseGPR = base.gpr();
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
GPRReg scratchGPR = scratch.gpr();
base.use();
value.use();
cachedPutById(node.codeOrigin, baseGPR, valueTagGPR, valuePayloadGPR, node.child2(), scratchGPR, node.identifierNumber(), Direct);
noResult(m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case GetGlobalVar: {
GPRTemporary resultPayload(this);
GPRTemporary resultTag(this);
m_jit.move(TrustedImmPtr(node.registerPointer()), resultPayload.gpr());
m_jit.load32(JITCompiler::Address(resultPayload.gpr(), OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)), resultTag.gpr());
m_jit.load32(JITCompiler::Address(resultPayload.gpr(), OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)), resultPayload.gpr());
jsValueResult(resultTag.gpr(), resultPayload.gpr(), m_compileIndex);
break;
}
case PutGlobalVar: {
JSValueOperand value(this, node.child1());
if (Heap::isWriteBarrierEnabled()) {
GPRTemporary scratch(this);
GPRReg scratchReg = scratch.gpr();
writeBarrier(m_jit.globalObjectFor(node.codeOrigin), value.tagGPR(), node.child1(), WriteBarrierForVariableAccess, scratchReg);
}
// FIXME: if we happen to have a spare register - and _ONLY_ if we happen to have
// a spare register - a good optimization would be to put the register pointer into
// a register and then do a zero offset store followed by a four-offset store (or
// vice-versa depending on endianness).
m_jit.store32(value.tagGPR(), node.registerPointer()->tagPointer());
m_jit.store32(value.payloadGPR(), node.registerPointer()->payloadPointer());
noResult(m_compileIndex);
break;
}
case PutGlobalVarCheck: {
JSValueOperand value(this, node.child1());
WatchpointSet* watchpointSet =
m_jit.globalObjectFor(node.codeOrigin)->symbolTable()->get(
identifier(node.identifierNumberForCheck())->impl()).watchpointSet();
addSlowPathGenerator(
slowPathCall(
m_jit.branchTest8(
JITCompiler::NonZero,
JITCompiler::AbsoluteAddress(watchpointSet->addressOfIsWatched())),
this, operationNotifyGlobalVarWrite, NoResult, watchpointSet));
if (Heap::isWriteBarrierEnabled()) {
GPRTemporary scratch(this);
GPRReg scratchReg = scratch.gpr();
writeBarrier(m_jit.globalObjectFor(node.codeOrigin), value.tagGPR(), node.child1(), WriteBarrierForVariableAccess, scratchReg);
}
// FIXME: if we happen to have a spare register - and _ONLY_ if we happen to have
// a spare register - a good optimization would be to put the register pointer into
// a register and then do a zero offset store followed by a four-offset store (or
// vice-versa depending on endianness).
m_jit.store32(value.tagGPR(), node.registerPointer()->tagPointer());
m_jit.store32(value.payloadGPR(), node.registerPointer()->payloadPointer());
noResult(m_compileIndex);
break;
}
case GlobalVarWatchpoint: {
m_jit.globalObjectFor(node.codeOrigin)->symbolTable()->get(
identifier(node.identifierNumberForCheck())->impl()).addWatchpoint(
speculationWatchpoint());
#if DFG_ENABLE(JIT_ASSERT)
GPRTemporary scratch(this);
GPRReg scratchGPR = scratch.gpr();
m_jit.load32(node.registerPointer()->tagPointer(), scratchGPR);
JITCompiler::Jump notOK = m_jit.branch32(
JITCompiler::NotEqual, scratchGPR,
TrustedImm32(node.registerPointer()->get().tag()));
m_jit.load32(node.registerPointer()->payloadPointer(), scratchGPR);
JITCompiler::Jump ok = m_jit.branch32(
JITCompiler::Equal, scratchGPR,
TrustedImm32(node.registerPointer()->get().payload()));
notOK.link(&m_jit);
m_jit.breakpoint();
ok.link(&m_jit);
#endif
noResult(m_compileIndex);
break;
}
case CheckHasInstance: {
SpeculateCellOperand base(this, node.child1());
GPRTemporary structure(this);
// Speculate that base 'ImplementsDefaultHasInstance'.
m_jit.loadPtr(MacroAssembler::Address(base.gpr(), JSCell::structureOffset()), structure.gpr());
speculationCheck(Uncountable, JSValueRegs(), NoNode, m_jit.branchTest8(MacroAssembler::Zero, MacroAssembler::Address(structure.gpr(), Structure::typeInfoFlagsOffset()), MacroAssembler::TrustedImm32(ImplementsDefaultHasInstance)));
noResult(m_compileIndex);
break;
}
case InstanceOf: {
compileInstanceOf(node);
break;
}
case IsUndefined: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this);
JITCompiler::Jump isCell = m_jit.branch32(JITCompiler::Equal, value.tagGPR(), JITCompiler::TrustedImm32(JSValue::CellTag));
m_jit.compare32(JITCompiler::Equal, value.tagGPR(), TrustedImm32(JSValue::UndefinedTag), result.gpr());
JITCompiler::Jump done = m_jit.jump();
isCell.link(&m_jit);
JITCompiler::Jump notMasqueradesAsUndefined;
if (m_jit.graph().globalObjectFor(node.codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(node.codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
m_jit.move(TrustedImm32(0), result.gpr());
notMasqueradesAsUndefined = m_jit.jump();
} else {
m_jit.loadPtr(JITCompiler::Address(value.payloadGPR(), JSCell::structureOffset()), result.gpr());
JITCompiler::Jump isMasqueradesAsUndefined = m_jit.branchTest8(JITCompiler::NonZero, JITCompiler::Address(result.gpr(), Structure::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined));
m_jit.move(TrustedImm32(0), result.gpr());
notMasqueradesAsUndefined = m_jit.jump();
isMasqueradesAsUndefined.link(&m_jit);
GPRTemporary localGlobalObject(this);
GPRTemporary remoteGlobalObject(this);
GPRReg localGlobalObjectGPR = localGlobalObject.gpr();
GPRReg remoteGlobalObjectGPR = remoteGlobalObject.gpr();
m_jit.move(TrustedImmPtr(m_jit.globalObjectFor(node.codeOrigin)), localGlobalObjectGPR);
m_jit.loadPtr(JITCompiler::Address(result.gpr(), Structure::globalObjectOffset()), remoteGlobalObjectGPR);
m_jit.compare32(JITCompiler::Equal, localGlobalObjectGPR, remoteGlobalObjectGPR, result.gpr());
}
notMasqueradesAsUndefined.link(&m_jit);
done.link(&m_jit);
booleanResult(result.gpr(), m_compileIndex);
break;
}
case IsBoolean: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value);
m_jit.compare32(JITCompiler::Equal, value.tagGPR(), JITCompiler::TrustedImm32(JSValue::BooleanTag), result.gpr());
booleanResult(result.gpr(), m_compileIndex);
break;
}
case IsNumber: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value);
m_jit.add32(TrustedImm32(1), value.tagGPR(), result.gpr());
m_jit.compare32(JITCompiler::Below, result.gpr(), JITCompiler::TrustedImm32(JSValue::LowestTag + 1), result.gpr());
booleanResult(result.gpr(), m_compileIndex);
break;
}
case IsString: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value);
JITCompiler::Jump isNotCell = m_jit.branch32(JITCompiler::NotEqual, value.tagGPR(), JITCompiler::TrustedImm32(JSValue::CellTag));
m_jit.loadPtr(JITCompiler::Address(value.payloadGPR(), JSCell::structureOffset()), result.gpr());
m_jit.compare8(JITCompiler::Equal, JITCompiler::Address(result.gpr(), Structure::typeInfoTypeOffset()), TrustedImm32(StringType), result.gpr());
JITCompiler::Jump done = m_jit.jump();
isNotCell.link(&m_jit);
m_jit.move(TrustedImm32(0), result.gpr());
done.link(&m_jit);
booleanResult(result.gpr(), m_compileIndex);
break;
}
case IsObject: {
JSValueOperand value(this, node.child1());
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
GPRResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
callOperation(operationIsObject, resultGPR, valueTagGPR, valuePayloadGPR);
booleanResult(result.gpr(), m_compileIndex);
break;
}
case IsFunction: {
JSValueOperand value(this, node.child1());
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
GPRResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
callOperation(operationIsFunction, resultGPR, valueTagGPR, valuePayloadGPR);
booleanResult(result.gpr(), m_compileIndex);
break;
}
case Phi:
case Flush:
break;
case Breakpoint:
#if ENABLE(DEBUG_WITH_BREAKPOINT)
m_jit.breakpoint();
#else
ASSERT_NOT_REACHED();
#endif
break;
case Call:
case Construct:
emitCall(node);
break;
case Resolve: {
flushRegisters();
GPRResult resultPayload(this);
GPRResult2 resultTag(this);
callOperation(operationResolve, resultTag.gpr(), resultPayload.gpr(), identifier(node.identifierNumber()));
jsValueResult(resultTag.gpr(), resultPayload.gpr(), m_compileIndex);
break;
}
case ResolveBase: {
flushRegisters();
GPRResult resultPayload(this);
GPRResult2 resultTag(this);
callOperation(operationResolveBase, resultTag.gpr(), resultPayload.gpr(), identifier(node.identifierNumber()));
jsValueResult(resultTag.gpr(), resultPayload.gpr(), m_compileIndex);
break;
}
case ResolveBaseStrictPut: {
flushRegisters();
GPRResult resultPayload(this);
GPRResult2 resultTag(this);
callOperation(operationResolveBaseStrictPut, resultTag.gpr(), resultPayload.gpr(), identifier(node.identifierNumber()));
jsValueResult(resultTag.gpr(), resultPayload.gpr(), m_compileIndex);
break;
}
case ResolveGlobal: {
GPRTemporary globalObject(this);
GPRTemporary resolveInfo(this);
GPRTemporary resultTag(this);
GPRTemporary resultPayload(this);
GPRReg globalObjectGPR = globalObject.gpr();
GPRReg resolveInfoGPR = resolveInfo.gpr();
GPRReg resultTagGPR = resultTag.gpr();
GPRReg resultPayloadGPR = resultPayload.gpr();
ResolveGlobalData& data = m_jit.graph().m_resolveGlobalData[node.resolveGlobalDataIndex()];
GlobalResolveInfo* resolveInfoAddress = &(m_jit.codeBlock()->globalResolveInfo(data.resolveInfoIndex));
// Check Structure of global object
m_jit.move(JITCompiler::TrustedImmPtr(m_jit.globalObjectFor(node.codeOrigin)), globalObjectGPR);
m_jit.move(JITCompiler::TrustedImmPtr(resolveInfoAddress), resolveInfoGPR);
m_jit.loadPtr(JITCompiler::Address(resolveInfoGPR, OBJECT_OFFSETOF(GlobalResolveInfo, structure)), resultPayloadGPR);
JITCompiler::Jump structuresNotMatch = m_jit.branchPtr(JITCompiler::NotEqual, resultPayloadGPR, JITCompiler::Address(globalObjectGPR, JSCell::structureOffset()));
// Fast case
m_jit.loadPtr(JITCompiler::Address(globalObjectGPR, JSObject::offsetOfOutOfLineStorage()), resultPayloadGPR);
m_jit.load32(JITCompiler::Address(resolveInfoGPR, OBJECT_OFFSETOF(GlobalResolveInfo, offset)), resolveInfoGPR);
#if DFG_ENABLE(JIT_ASSERT)
JITCompiler::Jump isOutOfLine = m_jit.branch32(JITCompiler::GreaterThanOrEqual, resolveInfoGPR, TrustedImm32(inlineStorageCapacity));
m_jit.breakpoint();
isOutOfLine.link(&m_jit);
#endif
m_jit.neg32(resolveInfoGPR);
m_jit.signExtend32ToPtr(resolveInfoGPR, resolveInfoGPR);
m_jit.load32(JITCompiler::BaseIndex(resultPayloadGPR, resolveInfoGPR, JITCompiler::TimesEight, OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag) + (inlineStorageCapacity - 2) * static_cast<ptrdiff_t>(sizeof(JSValue))), resultTagGPR);
m_jit.load32(JITCompiler::BaseIndex(resultPayloadGPR, resolveInfoGPR, JITCompiler::TimesEight, OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload) + (inlineStorageCapacity - 2) * static_cast<ptrdiff_t>(sizeof(JSValue))), resultPayloadGPR);
addSlowPathGenerator(
slowPathCall(
structuresNotMatch, this, operationResolveGlobal,
JSValueRegs(resultTagGPR, resultPayloadGPR), resolveInfoGPR, globalObjectGPR,
&m_jit.codeBlock()->identifier(data.identifierNumber)));
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex);
break;
}
case CreateActivation: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value, false);
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
GPRReg resultGPR = result.gpr();
m_jit.move(valuePayloadGPR, resultGPR);
JITCompiler::Jump notCreated = m_jit.branch32(JITCompiler::Equal, valueTagGPR, TrustedImm32(JSValue::EmptyValueTag));
addSlowPathGenerator(
slowPathCall(notCreated, this, operationCreateActivation, resultGPR));
cellResult(resultGPR, m_compileIndex);
break;
}
case CreateArguments: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value, false);
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
GPRReg resultGPR = result.gpr();
m_jit.move(valuePayloadGPR, resultGPR);
JITCompiler::Jump notCreated = m_jit.branch32(JITCompiler::Equal, valueTagGPR, TrustedImm32(JSValue::EmptyValueTag));
if (node.codeOrigin.inlineCallFrame) {
addSlowPathGenerator(
slowPathCall(
notCreated, this, operationCreateInlinedArguments, resultGPR,
node.codeOrigin.inlineCallFrame));
} else {
addSlowPathGenerator(
slowPathCall(notCreated, this, operationCreateArguments, resultGPR));
}
cellResult(resultGPR, m_compileIndex);
break;
}
case TearOffActivation: {
JSValueOperand activationValue(this, node.child1());
JSValueOperand argumentsValue(this, node.child2());
GPRReg activationValueTagGPR = activationValue.tagGPR();
GPRReg activationValuePayloadGPR = activationValue.payloadGPR();
GPRReg argumentsValueTagGPR = argumentsValue.tagGPR();
JITCompiler::JumpList created;
created.append(m_jit.branch32(JITCompiler::NotEqual, activationValueTagGPR, TrustedImm32(JSValue::EmptyValueTag)));
created.append(m_jit.branch32(JITCompiler::NotEqual, argumentsValueTagGPR, TrustedImm32(JSValue::EmptyValueTag)));
addSlowPathGenerator(
slowPathCall(
created, this, operationTearOffActivation, NoResult, activationValuePayloadGPR,
static_cast<int32_t>(node.unmodifiedArgumentsRegister())));
noResult(m_compileIndex);
break;
}
case TearOffArguments: {
JSValueOperand argumentsValue(this, node.child1());
GPRReg argumentsValueTagGPR = argumentsValue.tagGPR();
GPRReg argumentsValuePayloadGPR = argumentsValue.payloadGPR();
JITCompiler::Jump created = m_jit.branch32(
JITCompiler::NotEqual, argumentsValueTagGPR, TrustedImm32(JSValue::EmptyValueTag));
if (node.codeOrigin.inlineCallFrame) {
addSlowPathGenerator(
slowPathCall(
created, this, operationTearOffInlinedArguments, NoResult,
argumentsValuePayloadGPR, node.codeOrigin.inlineCallFrame));
} else {
addSlowPathGenerator(
slowPathCall(
created, this, operationTearOffArguments, NoResult,
argumentsValuePayloadGPR));
}
noResult(m_compileIndex);
break;
}
case CheckArgumentsNotCreated: {
ASSERT(!isEmptySpeculation(
m_state.variables().operand(
m_jit.graph().argumentsRegisterFor(node.codeOrigin)).m_type));
speculationCheck(
Uncountable, JSValueRegs(), NoNode,
m_jit.branch32(
JITCompiler::NotEqual,
JITCompiler::tagFor(m_jit.argumentsRegisterFor(node.codeOrigin)),
TrustedImm32(JSValue::EmptyValueTag)));
noResult(m_compileIndex);
break;
}
case GetMyArgumentsLength: {
GPRTemporary result(this);
GPRReg resultGPR = result.gpr();
if (!isEmptySpeculation(
m_state.variables().operand(
m_jit.graph().argumentsRegisterFor(node.codeOrigin)).m_type)) {
speculationCheck(
ArgumentsEscaped, JSValueRegs(), NoNode,
m_jit.branch32(
JITCompiler::NotEqual,
JITCompiler::tagFor(m_jit.argumentsRegisterFor(node.codeOrigin)),
TrustedImm32(JSValue::EmptyValueTag)));
}
ASSERT(!node.codeOrigin.inlineCallFrame);
m_jit.load32(JITCompiler::payloadFor(RegisterFile::ArgumentCount), resultGPR);
m_jit.sub32(TrustedImm32(1), resultGPR);
integerResult(resultGPR, m_compileIndex);
break;
}
case GetMyArgumentsLengthSafe: {
GPRTemporary resultPayload(this);
GPRTemporary resultTag(this);
GPRReg resultPayloadGPR = resultPayload.gpr();
GPRReg resultTagGPR = resultTag.gpr();
JITCompiler::Jump created = m_jit.branch32(
JITCompiler::NotEqual,
JITCompiler::tagFor(m_jit.argumentsRegisterFor(node.codeOrigin)),
TrustedImm32(JSValue::EmptyValueTag));
if (node.codeOrigin.inlineCallFrame) {
m_jit.move(
Imm32(node.codeOrigin.inlineCallFrame->arguments.size() - 1),
resultPayloadGPR);
} else {
m_jit.load32(JITCompiler::payloadFor(RegisterFile::ArgumentCount), resultPayloadGPR);
m_jit.sub32(TrustedImm32(1), resultPayloadGPR);
}
m_jit.move(TrustedImm32(JSValue::Int32Tag), resultTagGPR);
// FIXME: the slow path generator should perform a forward speculation that the
// result is an integer. For now we postpone the speculation by having this return
// a JSValue.
addSlowPathGenerator(
slowPathCall(
created, this, operationGetArgumentsLength,
JSValueRegs(resultTagGPR, resultPayloadGPR),
m_jit.argumentsRegisterFor(node.codeOrigin)));
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex);
break;
}
case GetMyArgumentByVal: {
SpeculateStrictInt32Operand index(this, node.child1());
GPRTemporary resultPayload(this);
GPRTemporary resultTag(this);
GPRReg indexGPR = index.gpr();
GPRReg resultPayloadGPR = resultPayload.gpr();
GPRReg resultTagGPR = resultTag.gpr();
if (!isEmptySpeculation(
m_state.variables().operand(
m_jit.graph().argumentsRegisterFor(node.codeOrigin)).m_type)) {
speculationCheck(
ArgumentsEscaped, JSValueRegs(), NoNode,
m_jit.branch32(
JITCompiler::NotEqual,
JITCompiler::tagFor(m_jit.argumentsRegisterFor(node.codeOrigin)),
TrustedImm32(JSValue::EmptyValueTag)));
}
m_jit.add32(TrustedImm32(1), indexGPR, resultPayloadGPR);
if (node.codeOrigin.inlineCallFrame) {
speculationCheck(
Uncountable, JSValueRegs(), NoNode,
m_jit.branch32(
JITCompiler::AboveOrEqual,
resultPayloadGPR,
Imm32(node.codeOrigin.inlineCallFrame->arguments.size())));
} else {
speculationCheck(
Uncountable, JSValueRegs(), NoNode,
m_jit.branch32(
JITCompiler::AboveOrEqual,
resultPayloadGPR,
JITCompiler::payloadFor(RegisterFile::ArgumentCount)));
}
m_jit.neg32(resultPayloadGPR);
size_t baseOffset =
((node.codeOrigin.inlineCallFrame
? node.codeOrigin.inlineCallFrame->stackOffset
: 0) + CallFrame::argumentOffsetIncludingThis(0)) * sizeof(Register);
m_jit.load32(
JITCompiler::BaseIndex(
GPRInfo::callFrameRegister, resultPayloadGPR, JITCompiler::TimesEight,
baseOffset + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)),
resultTagGPR);
m_jit.load32(
JITCompiler::BaseIndex(
GPRInfo::callFrameRegister, resultPayloadGPR, JITCompiler::TimesEight,
baseOffset + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)),
resultPayloadGPR);
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex);
break;
}
case GetMyArgumentByValSafe: {
SpeculateStrictInt32Operand index(this, node.child1());
GPRTemporary resultPayload(this);
GPRTemporary resultTag(this);
GPRReg indexGPR = index.gpr();
GPRReg resultPayloadGPR = resultPayload.gpr();
GPRReg resultTagGPR = resultTag.gpr();
JITCompiler::JumpList slowPath;
slowPath.append(
m_jit.branch32(
JITCompiler::NotEqual,
JITCompiler::tagFor(m_jit.argumentsRegisterFor(node.codeOrigin)),
TrustedImm32(JSValue::EmptyValueTag)));
m_jit.add32(TrustedImm32(1), indexGPR, resultPayloadGPR);
if (node.codeOrigin.inlineCallFrame) {
slowPath.append(
m_jit.branch32(
JITCompiler::AboveOrEqual,
resultPayloadGPR,
Imm32(node.codeOrigin.inlineCallFrame->arguments.size())));
} else {
slowPath.append(
m_jit.branch32(
JITCompiler::AboveOrEqual,
resultPayloadGPR,
JITCompiler::payloadFor(RegisterFile::ArgumentCount)));
}
m_jit.neg32(resultPayloadGPR);
size_t baseOffset =
((node.codeOrigin.inlineCallFrame
? node.codeOrigin.inlineCallFrame->stackOffset
: 0) + CallFrame::argumentOffsetIncludingThis(0)) * sizeof(Register);
m_jit.load32(
JITCompiler::BaseIndex(
GPRInfo::callFrameRegister, resultPayloadGPR, JITCompiler::TimesEight,
baseOffset + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.tag)),
resultTagGPR);
m_jit.load32(
JITCompiler::BaseIndex(
GPRInfo::callFrameRegister, resultPayloadGPR, JITCompiler::TimesEight,
baseOffset + OBJECT_OFFSETOF(EncodedValueDescriptor, asBits.payload)),
resultPayloadGPR);
if (node.codeOrigin.inlineCallFrame) {
addSlowPathGenerator(
slowPathCall(
slowPath, this, operationGetInlinedArgumentByVal,
JSValueRegs(resultTagGPR, resultPayloadGPR),
m_jit.argumentsRegisterFor(node.codeOrigin),
node.codeOrigin.inlineCallFrame, indexGPR));
} else {
addSlowPathGenerator(
slowPathCall(
slowPath, this, operationGetArgumentByVal,
JSValueRegs(resultTagGPR, resultPayloadGPR),
m_jit.argumentsRegisterFor(node.codeOrigin), indexGPR));
}
jsValueResult(resultTagGPR, resultPayloadGPR, m_compileIndex);
break;
}
case NewFunctionNoCheck:
compileNewFunctionNoCheck(node);
break;
case NewFunction: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value, false);
GPRReg valueTagGPR = value.tagGPR();
GPRReg valuePayloadGPR = value.payloadGPR();
GPRReg resultGPR = result.gpr();
m_jit.move(valuePayloadGPR, resultGPR);
JITCompiler::Jump notCreated = m_jit.branch32(JITCompiler::Equal, valueTagGPR, TrustedImm32(JSValue::EmptyValueTag));
addSlowPathGenerator(
slowPathCall(
notCreated, this, operationNewFunction, resultGPR,
m_jit.codeBlock()->functionDecl(node.functionDeclIndex())));
cellResult(resultGPR, m_compileIndex);
break;
}
case NewFunctionExpression:
compileNewFunctionExpression(node);
break;
case ForceOSRExit: {
terminateSpeculativeExecution(InadequateCoverage, JSValueRegs(), NoNode);
break;
}
case Phantom:
// This is a no-op.
noResult(m_compileIndex);
break;
case InlineStart:
case Nop:
case LastNodeType:
ASSERT_NOT_REACHED();
break;
}
if (!m_compileOkay)
return;
if (node.hasResult() && node.mustGenerate())
use(m_compileIndex);
}
#endif
} } // namespace JSC::DFG
#endif