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webkit / WebKit / 63a291eb831ac1375dbe031a1269da8637b8b14f / . / Source / JavaScriptCore / dfg / DFGSpeculativeJIT64.cpp
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/*
* Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "DFGSpeculativeJIT.h"
#if ENABLE(DFG_JIT)
#include "Arguments.h"
#include "DFGSlowPathGenerator.h"
namespace JSC { namespace DFG {
#if USE(JSVALUE64)
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);
info.fillInteger(*m_stream, gpr);
returnFormat = DataFormatInteger;
return gpr;
}
if (isNumberConstant(nodeIndex)) {
JSValue jsValue = jsNumber(valueOfNumberConstant(nodeIndex));
m_jit.move(MacroAssembler::ImmPtr(JSValue::encode(jsValue)), gpr);
} else {
ASSERT(isJSConstant(nodeIndex));
JSValue jsValue = valueOfJSConstant(nodeIndex);
m_jit.move(MacroAssembler::TrustedImmPtr(JSValue::encode(jsValue)), gpr);
}
} else if (info.spillFormat() == DataFormatInteger) {
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.load32(JITCompiler::payloadFor(virtualRegister), gpr);
// Tag it, since fillInteger() is used when we want a boxed integer.
m_jit.orPtr(GPRInfo::tagTypeNumberRegister, gpr);
} else {
ASSERT(info.spillFormat() == DataFormatJS || info.spillFormat() == DataFormatJSInteger);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.loadPtr(JITCompiler::addressFor(virtualRegister), gpr);
}
// Since we statically know that we're filling an integer, and values
// in the RegisterFile are boxed, this must be DataFormatJSInteger.
// We will check this with a jitAssert below.
info.fillJSValue(*m_stream, gpr, DataFormatJSInteger);
unlock(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 gpr = info.gpr();
m_gprs.lock(gpr);
m_jit.jitAssertIsJSInt32(gpr);
returnFormat = DataFormatJSInteger;
return gpr;
}
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()) {
GPRReg gpr = allocate();
if (isInt32Constant(nodeIndex)) {
// FIXME: should not be reachable?
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.move(MacroAssembler::ImmPtr(reinterpret_cast<void*>(reinterpretDoubleToIntptr(valueOfNumberConstant(nodeIndex)))), gpr);
m_jit.movePtrToDouble(gpr, fpr);
unlock(gpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
return fpr;
} else {
// FIXME: should not be reachable?
ASSERT(isJSConstant(nodeIndex));
JSValue jsValue = valueOfJSConstant(nodeIndex);
m_jit.move(MacroAssembler::TrustedImmPtr(JSValue::encode(jsValue)), gpr);
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
info.fillJSValue(*m_stream, gpr, DataFormatJS);
unlock(gpr);
}
} else {
DataFormat spillFormat = info.spillFormat();
switch (spillFormat) {
case DataFormatDouble: {
FPRReg fpr = fprAllocate();
m_jit.loadDouble(JITCompiler::addressFor(virtualRegister), fpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
return fpr;
}
case DataFormatInteger: {
GPRReg gpr = allocate();
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.load32(JITCompiler::addressFor(virtualRegister), gpr);
info.fillInteger(*m_stream, gpr);
unlock(gpr);
break;
}
default:
GPRReg gpr = allocate();
ASSERT(spillFormat & DataFormatJS);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.loadPtr(JITCompiler::addressFor(virtualRegister), gpr);
info.fillJSValue(*m_stream, gpr, spillFormat);
unlock(gpr);
break;
}
}
}
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 DataFormatJS: {
GPRReg jsValueGpr = info.gpr();
m_gprs.lock(jsValueGpr);
FPRReg fpr = fprAllocate();
GPRReg tempGpr = allocate(); // FIXME: can we skip this allocation on the last use of the virtual register?
JITCompiler::Jump isInteger = m_jit.branchPtr(MacroAssembler::AboveOrEqual, jsValueGpr, GPRInfo::tagTypeNumberRegister);
m_jit.jitAssertIsJSDouble(jsValueGpr);
// First, if we get here we have a double encoded as a JSValue
m_jit.move(jsValueGpr, tempGpr);
unboxDouble(tempGpr, fpr);
JITCompiler::Jump hasUnboxedDouble = m_jit.jump();
// Finally, handle integers.
isInteger.link(&m_jit);
m_jit.convertInt32ToDouble(jsValueGpr, fpr);
hasUnboxedDouble.link(&m_jit);
m_gprs.release(jsValueGpr);
m_gprs.unlock(jsValueGpr);
m_gprs.unlock(tempGpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
info.killSpilled();
return fpr;
}
case DataFormatJSInteger:
case DataFormatInteger: {
FPRReg fpr = fprAllocate();
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
m_jit.convertInt32ToDouble(gpr, fpr);
m_gprs.unlock(gpr);
return fpr;
}
// Unbox the double
case DataFormatJSDouble: {
GPRReg gpr = info.gpr();
FPRReg fpr = fprAllocate();
if (m_gprs.isLocked(gpr)) {
// Make sure we don't trample gpr if it is in use.
GPRReg temp = allocate();
m_jit.move(gpr, temp);
unboxDouble(temp, fpr);
unlock(temp);
} else
unboxDouble(gpr, fpr);
m_gprs.release(gpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
return fpr;
}
case DataFormatDouble: {
FPRReg fpr = info.fpr();
m_fprs.lock(fpr);
return fpr;
}
default:
ASSERT_NOT_REACHED();
return InvalidFPRReg;
}
}
GPRReg SpeculativeJIT::fillJSValue(NodeIndex nodeIndex)
{
Node& node = at(nodeIndex);
VirtualRegister virtualRegister = node.virtualRegister();
GenerationInfo& info = m_generationInfo[virtualRegister];
switch (info.registerFormat()) {
case DataFormatNone: {
GPRReg gpr = allocate();
if (node.hasConstant()) {
if (isInt32Constant(nodeIndex)) {
info.fillJSValue(*m_stream, gpr, DataFormatJSInteger);
JSValue jsValue = jsNumber(valueOfInt32Constant(nodeIndex));
m_jit.move(MacroAssembler::ImmPtr(JSValue::encode(jsValue)), gpr);
} else if (isNumberConstant(nodeIndex)) {
info.fillJSValue(*m_stream, gpr, DataFormatJSDouble);
JSValue jsValue(JSValue::EncodeAsDouble, valueOfNumberConstant(nodeIndex));
m_jit.move(MacroAssembler::ImmPtr(JSValue::encode(jsValue)), gpr);
} else {
ASSERT(isJSConstant(nodeIndex));
JSValue jsValue = valueOfJSConstant(nodeIndex);
m_jit.move(MacroAssembler::TrustedImmPtr(JSValue::encode(jsValue)), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJS);
}
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
} else {
DataFormat spillFormat = info.spillFormat();
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
if (spillFormat == DataFormatInteger) {
m_jit.load32(JITCompiler::addressFor(virtualRegister), gpr);
m_jit.orPtr(GPRInfo::tagTypeNumberRegister, gpr);
spillFormat = DataFormatJSInteger;
} else {
m_jit.loadPtr(JITCompiler::addressFor(virtualRegister), gpr);
if (spillFormat == DataFormatDouble) {
// Need to box the double, since we want a JSValue.
m_jit.subPtr(GPRInfo::tagTypeNumberRegister, gpr);
spillFormat = DataFormatJSDouble;
} else
ASSERT(spillFormat & DataFormatJS);
}
info.fillJSValue(*m_stream, gpr, spillFormat);
}
return gpr;
}
case DataFormatInteger: {
GPRReg gpr = info.gpr();
// If the register has already been locked we need to take a copy.
// If not, we'll zero extend in place, so mark on the info that this is now type DataFormatInteger, not DataFormatJSInteger.
if (m_gprs.isLocked(gpr)) {
GPRReg result = allocate();
m_jit.orPtr(GPRInfo::tagTypeNumberRegister, gpr, result);
return result;
}
m_gprs.lock(gpr);
m_jit.orPtr(GPRInfo::tagTypeNumberRegister, gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJSInteger);
return gpr;
}
case DataFormatDouble: {
FPRReg fpr = info.fpr();
GPRReg gpr = boxDouble(fpr);
// Update all info
info.fillJSValue(*m_stream, gpr, DataFormatJSDouble);
m_fprs.release(fpr);
m_gprs.retain(gpr, virtualRegister, SpillOrderJS);
return gpr;
}
case DataFormatCell:
// No retag required on JSVALUE64!
case DataFormatJS:
case DataFormatJSInteger:
case DataFormatJSDouble:
case DataFormatJSCell:
case DataFormatJSBoolean: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
return gpr;
}
case DataFormatBoolean:
case DataFormatStorage:
// this type currently never occurs
ASSERT_NOT_REACHED();
default:
ASSERT_NOT_REACHED();
return InvalidGPRReg;
}
}
class ValueToNumberSlowPathGenerator
: public CallSlowPathGenerator<MacroAssembler::Jump, D_DFGOperation_EJ, GPRReg> {
public:
ValueToNumberSlowPathGenerator(
MacroAssembler::Jump from, SpeculativeJIT* jit,
GPRReg resultGPR, GPRReg jsValueGPR)
: CallSlowPathGenerator<MacroAssembler::Jump, D_DFGOperation_EJ, GPRReg>(
from, jit, dfgConvertJSValueToNumber, NeedToSpill, resultGPR)
, m_jsValueGPR(jsValueGPR)
{
}
protected:
virtual void generateInternal(SpeculativeJIT* jit)
{
setUp(jit);
recordCall(jit->callOperation(dfgConvertJSValueToNumber, FPRInfo::returnValueFPR, m_jsValueGPR));
jit->boxDouble(FPRInfo::returnValueFPR, m_result);
tearDown(jit);
}
private:
GPRReg m_jsValueGPR;
};
void SpeculativeJIT::nonSpeculativeValueToNumber(Node& node)
{
if (isKnownNumeric(node.child1().index())) {
JSValueOperand op1(this, node.child1());
GPRTemporary result(this, op1);
m_jit.move(op1.gpr(), result.gpr());
jsValueResult(result.gpr(), m_compileIndex);
return;
}
JSValueOperand op1(this, node.child1());
GPRTemporary result(this);
ASSERT(!isInt32Constant(node.child1().index()));
ASSERT(!isNumberConstant(node.child1().index()));
GPRReg jsValueGpr = op1.gpr();
GPRReg gpr = result.gpr();
op1.use();
JITCompiler::Jump isInteger = m_jit.branchPtr(MacroAssembler::AboveOrEqual, jsValueGpr, GPRInfo::tagTypeNumberRegister);
JITCompiler::Jump nonNumeric = m_jit.branchTestPtr(MacroAssembler::Zero, jsValueGpr, GPRInfo::tagTypeNumberRegister);
// First, if we get here we have a double encoded as a JSValue
m_jit.move(jsValueGpr, gpr);
JITCompiler::Jump hasUnboxedDouble = m_jit.jump();
// Finally, handle integers.
isInteger.link(&m_jit);
m_jit.orPtr(GPRInfo::tagTypeNumberRegister, jsValueGpr, gpr);
hasUnboxedDouble.link(&m_jit);
addSlowPathGenerator(adoptPtr(new ValueToNumberSlowPathGenerator(nonNumeric, this, gpr, jsValueGpr)));
jsValueResult(result.gpr(), 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.zeroExtend32ToPtr(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, op1);
GPRReg jsValueGpr = op1.gpr();
GPRReg resultGPR = result.gpr();
op1.use();
JITCompiler::Jump isNotInteger = m_jit.branchPtr(MacroAssembler::Below, jsValueGpr, GPRInfo::tagTypeNumberRegister);
m_jit.zeroExtend32ToPtr(jsValueGpr, resultGPR);
addSlowPathGenerator(
slowPathCall(isNotInteger, this, dfgConvertJSValueToInt32, resultGPR, jsValueGpr));
integerResult(resultGPR, m_compileIndex, UseChildrenCalledExplicitly);
}
void SpeculativeJIT::nonSpeculativeUInt32ToNumber(Node& node)
{
IntegerOperand op1(this, node.child1());
FPRTemporary boxer(this);
GPRTemporary result(this, op1);
JITCompiler::Jump positive = m_jit.branch32(MacroAssembler::GreaterThanOrEqual, op1.gpr(), TrustedImm32(0));
m_jit.convertInt32ToDouble(op1.gpr(), boxer.fpr());
m_jit.addDouble(JITCompiler::AbsoluteAddress(&AssemblyHelpers::twoToThe32), boxer.fpr());
boxDouble(boxer.fpr(), result.gpr());
JITCompiler::Jump done = m_jit.jump();
positive.link(&m_jit);
m_jit.orPtr(GPRInfo::tagTypeNumberRegister, op1.gpr(), result.gpr());
done.link(&m_jit);
jsValueResult(result.gpr(), m_compileIndex);
}
void SpeculativeJIT::cachedGetById(CodeOrigin codeOrigin, GPRReg baseGPR, GPRReg resultGPR, unsigned identifierNumber, JITCompiler::Jump slowPathTarget, SpillRegistersMode spillMode)
{
JITCompiler::DataLabelPtr structureToCompare;
JITCompiler::PatchableJump structureCheck = m_jit.patchableBranchPtrWithPatch(JITCompiler::NotEqual, JITCompiler::Address(baseGPR, JSCell::structureOffset()), structureToCompare, JITCompiler::TrustedImmPtr(reinterpret_cast<void*>(-1)));
JITCompiler::ConvertibleLoadLabel propertyStorageLoad =
m_jit.convertibleLoadPtr(JITCompiler::Address(baseGPR, JSObject::offsetOfOutOfLineStorage()), resultGPR);
JITCompiler::DataLabelCompact loadWithPatch = m_jit.loadPtrWithCompactAddressOffsetPatch(JITCompiler::Address(resultGPR, 0), resultGPR);
JITCompiler::Label doneLabel = m_jit.label();
OwnPtr<SlowPathGenerator> slowPath;
if (!slowPathTarget.isSet()) {
slowPath = slowPathCall(
structureCheck.m_jump, this, operationGetByIdOptimize, resultGPR, baseGPR,
identifier(identifierNumber), spillMode);
} else {
JITCompiler::JumpList slowCases;
slowCases.append(structureCheck.m_jump);
slowCases.append(slowPathTarget);
slowPath = slowPathCall(
slowCases, this, operationGetByIdOptimize, resultGPR, baseGPR,
identifier(identifierNumber), spillMode);
}
m_jit.addPropertyAccess(
PropertyAccessRecord(
codeOrigin, structureToCompare, structureCheck, propertyStorageLoad, loadWithPatch,
slowPath.get(), doneLabel, safeCast<int8_t>(baseGPR), safeCast<int8_t>(resultGPR),
usedRegisters(),
spillMode == NeedToSpill ? PropertyAccessRecord::RegistersInUse : PropertyAccessRecord::RegistersFlushed));
addSlowPathGenerator(slowPath.release());
}
void SpeculativeJIT::cachedPutById(CodeOrigin codeOrigin, GPRReg baseGPR, GPRReg valueGPR, Edge valueUse, GPRReg scratchGPR, unsigned identifierNumber, PutKind putKind, JITCompiler::Jump slowPathTarget)
{
JITCompiler::DataLabelPtr structureToCompare;
JITCompiler::PatchableJump structureCheck = m_jit.patchableBranchPtrWithPatch(JITCompiler::NotEqual, JITCompiler::Address(baseGPR, JSCell::structureOffset()), structureToCompare, JITCompiler::TrustedImmPtr(reinterpret_cast<void*>(-1)));
writeBarrier(baseGPR, valueGPR, valueUse, WriteBarrierForPropertyAccess, scratchGPR);
JITCompiler::ConvertibleLoadLabel propertyStorageLoad =
m_jit.convertibleLoadPtr(JITCompiler::Address(baseGPR, JSObject::offsetOfOutOfLineStorage()), scratchGPR);
JITCompiler::DataLabel32 storeWithPatch = m_jit.storePtrWithAddressOffsetPatch(valueGPR, JITCompiler::Address(scratchGPR, 0));
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, valueGPR, baseGPR,
identifier(identifierNumber));
} else {
JITCompiler::JumpList slowCases;
slowCases.append(structureCheck.m_jump);
slowCases.append(slowPathTarget);
slowPath = slowPathCall(
slowCases, this, optimizedCall, NoResult, valueGPR, baseGPR,
identifier(identifierNumber));
}
RegisterSet currentlyUsedRegisters = usedRegisters();
currentlyUsedRegisters.clear(scratchGPR);
ASSERT(currentlyUsedRegisters.get(baseGPR));
ASSERT(currentlyUsedRegisters.get(valueGPR));
m_jit.addPropertyAccess(
PropertyAccessRecord(
codeOrigin, structureToCompare, structureCheck, propertyStorageLoad,
JITCompiler::DataLabelCompact(storeWithPatch.label()), slowPath.get(), doneLabel,
safeCast<int8_t>(baseGPR), safeCast<int8_t>(valueGPR), currentlyUsedRegisters));
addSlowPathGenerator(slowPath.release());
}
void SpeculativeJIT::nonSpeculativeNonPeepholeCompareNull(Edge operand, bool invert)
{
JSValueOperand arg(this, operand);
GPRReg argGPR = arg.gpr();
GPRTemporary result(this, arg);
GPRReg resultGPR = result.gpr();
JITCompiler::Jump notCell;
if (!isKnownCell(operand.index()))
notCell = m_jit.branchTestPtr(MacroAssembler::NonZero, argGPR, GPRInfo::tagMaskRegister);
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), resultGPR);
notMasqueradesAsUndefined = m_jit.jump();
} else {
m_jit.loadPtr(JITCompiler::Address(argGPR, JSCell::structureOffset()), resultGPR);
JITCompiler::Jump isMasqueradesAsUndefined = m_jit.branchTest8(JITCompiler::NonZero, JITCompiler::Address(resultGPR, Structure::typeInfoFlagsOffset()), JITCompiler::TrustedImm32(MasqueradesAsUndefined));
m_jit.move(invert ? TrustedImm32(1) : TrustedImm32(0), resultGPR);
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(resultGPR, Structure::globalObjectOffset()), remoteGlobalObjectGPR);
m_jit.comparePtr(invert ? JITCompiler::NotEqual : JITCompiler::Equal, localGlobalObjectGPR, remoteGlobalObjectGPR, resultGPR);
}
if (!isKnownCell(operand.index())) {
JITCompiler::Jump done = m_jit.jump();
notCell.link(&m_jit);
m_jit.move(argGPR, resultGPR);
m_jit.andPtr(JITCompiler::TrustedImm32(~TagBitUndefined), resultGPR);
m_jit.comparePtr(invert ? JITCompiler::NotEqual : JITCompiler::Equal, resultGPR, JITCompiler::TrustedImm32(ValueNull), resultGPR);
done.link(&m_jit);
}
notMasqueradesAsUndefined.link(&m_jit);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(resultGPR, m_compileIndex, DataFormatJSBoolean);
}
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 argGPR = arg.gpr();
GPRTemporary result(this, arg);
GPRReg resultGPR = result.gpr();
JITCompiler::Jump notCell;
if (!isKnownCell(operand.index()))
notCell = m_jit.branchTestPtr(MacroAssembler::NonZero, argGPR, GPRInfo::tagMaskRegister);
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(argGPR, 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);
m_jit.move(argGPR, resultGPR);
m_jit.andPtr(JITCompiler::TrustedImm32(~TagBitUndefined), resultGPR);
branchPtr(invert ? JITCompiler::NotEqual : JITCompiler::Equal, resultGPR, JITCompiler::TrustedImmPtr(reinterpret_cast<void*>(ValueNull)), 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 arg1GPR = arg1.gpr();
GPRReg arg2GPR = arg2.gpr();
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, arg1GPR, arg2GPR);
branchTest32(callResultCondition, resultGPR, taken);
} else {
GPRTemporary result(this, arg2);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
if (!isKnownInteger(node.child1().index()))
slowPath.append(m_jit.branchPtr(MacroAssembler::Below, arg1GPR, GPRInfo::tagTypeNumberRegister));
if (!isKnownInteger(node.child2().index()))
slowPath.append(m_jit.branchPtr(MacroAssembler::Below, arg2GPR, GPRInfo::tagTypeNumberRegister));
branch32(cond, arg1GPR, arg2GPR, taken);
if (!isKnownInteger(node.child1().index()) || !isKnownInteger(node.child2().index())) {
jump(notTaken, ForceJump);
slowPath.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(helperFunction, resultGPR, arg1GPR, arg2GPR);
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 arg1, GPRReg arg2)
: CallSlowPathGenerator<JumpType, S_DFGOperation_EJJ, GPRReg>(
from, jit, function, NeedToSpill, result)
, m_arg1(arg1)
, m_arg2(arg2)
{
}
protected:
virtual void generateInternal(SpeculativeJIT* jit)
{
this->setUp(jit);
this->recordCall(jit->callOperation(this->m_function, this->m_result, m_arg1, m_arg2));
jit->m_jit.and32(JITCompiler::TrustedImm32(1), this->m_result);
jit->m_jit.or32(JITCompiler::TrustedImm32(ValueFalse), this->m_result);
this->tearDown(jit);
}
private:
GPRReg m_arg1;
GPRReg m_arg2;
};
void SpeculativeJIT::nonSpeculativeNonPeepholeCompare(Node& node, MacroAssembler::RelationalCondition cond, S_DFGOperation_EJJ helperFunction)
{
JSValueOperand arg1(this, node.child1());
JSValueOperand arg2(this, node.child2());
GPRReg arg1GPR = arg1.gpr();
GPRReg arg2GPR = arg2.gpr();
JITCompiler::JumpList slowPath;
if (isKnownNotInteger(node.child1().index()) || isKnownNotInteger(node.child2().index())) {
GPRResult result(this);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
flushRegisters();
callOperation(helperFunction, resultGPR, arg1GPR, arg2GPR);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(resultGPR, m_compileIndex, DataFormatJSBoolean, UseChildrenCalledExplicitly);
} else {
GPRTemporary result(this, arg2);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
if (!isKnownInteger(node.child1().index()))
slowPath.append(m_jit.branchPtr(MacroAssembler::Below, arg1GPR, GPRInfo::tagTypeNumberRegister));
if (!isKnownInteger(node.child2().index()))
slowPath.append(m_jit.branchPtr(MacroAssembler::Below, arg2GPR, GPRInfo::tagTypeNumberRegister));
m_jit.compare32(cond, arg1GPR, arg2GPR, resultGPR);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
if (!isKnownInteger(node.child1().index()) || !isKnownInteger(node.child2().index())) {
addSlowPathGenerator(adoptPtr(
new CompareAndBoxBooleanSlowPathGenerator<JITCompiler::JumpList>(
slowPath, this, helperFunction, resultGPR, arg1GPR, arg2GPR)));
}
jsValueResult(resultGPR, m_compileIndex, DataFormatJSBoolean, 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 arg1GPR = arg1.gpr();
GPRReg arg2GPR = arg2.gpr();
GPRTemporary result(this);
GPRReg resultGPR = result.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, arg1GPR, arg2GPR, invert ? notTaken : taken);
silentSpillAllRegisters(resultGPR);
callOperation(operationCompareStrictEqCell, resultGPR, arg1GPR, arg2GPR);
silentFillAllRegisters(resultGPR);
branchTest32(invert ? JITCompiler::Zero : JITCompiler::NonZero, resultGPR, taken);
} else {
m_jit.orPtr(arg1GPR, arg2GPR, resultGPR);
JITCompiler::Jump twoCellsCase = m_jit.branchTestPtr(JITCompiler::Zero, resultGPR, GPRInfo::tagMaskRegister);
JITCompiler::Jump leftOK = m_jit.branchPtr(JITCompiler::AboveOrEqual, arg1GPR, GPRInfo::tagTypeNumberRegister);
JITCompiler::Jump leftDouble = m_jit.branchTestPtr(JITCompiler::NonZero, arg1GPR, GPRInfo::tagTypeNumberRegister);
leftOK.link(&m_jit);
JITCompiler::Jump rightOK = m_jit.branchPtr(JITCompiler::AboveOrEqual, arg2GPR, GPRInfo::tagTypeNumberRegister);
JITCompiler::Jump rightDouble = m_jit.branchTestPtr(JITCompiler::NonZero, arg2GPR, GPRInfo::tagTypeNumberRegister);
rightOK.link(&m_jit);
branchPtr(invert ? JITCompiler::NotEqual : JITCompiler::Equal, arg1GPR, arg2GPR, taken);
jump(notTaken, ForceJump);
twoCellsCase.link(&m_jit);
branchPtr(JITCompiler::Equal, arg1GPR, arg2GPR, invert ? notTaken : taken);
leftDouble.link(&m_jit);
rightDouble.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(operationCompareStrictEq, resultGPR, arg1GPR, arg2GPR);
silentFillAllRegisters(resultGPR);
branchTest32(invert ? JITCompiler::Zero : JITCompiler::NonZero, resultGPR, taken);
}
jump(notTaken);
}
void SpeculativeJIT::nonSpeculativeNonPeepholeStrictEq(Node& node, bool invert)
{
JSValueOperand arg1(this, node.child1());
JSValueOperand arg2(this, node.child2());
GPRReg arg1GPR = arg1.gpr();
GPRReg arg2GPR = arg2.gpr();
GPRTemporary result(this);
GPRReg resultGPR = result.gpr();
arg1.use();
arg2.use();
if (isKnownCell(node.child1().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, arg1GPR, arg2GPR);
m_jit.move(JITCompiler::TrustedImmPtr(JSValue::encode(jsBoolean(!invert))), resultGPR);
JITCompiler::Jump done = m_jit.jump();
notEqualCase.link(&m_jit);
silentSpillAllRegisters(resultGPR);
callOperation(operationCompareStrictEqCell, resultGPR, arg1GPR, arg2GPR);
silentFillAllRegisters(resultGPR);
m_jit.andPtr(JITCompiler::TrustedImm32(1), resultGPR);
m_jit.or32(JITCompiler::TrustedImm32(ValueFalse), resultGPR);
done.link(&m_jit);
} else {
m_jit.orPtr(arg1GPR, arg2GPR, resultGPR);
JITCompiler::JumpList slowPathCases;
JITCompiler::Jump twoCellsCase = m_jit.branchTestPtr(JITCompiler::Zero, resultGPR, GPRInfo::tagMaskRegister);
JITCompiler::Jump leftOK = m_jit.branchPtr(JITCompiler::AboveOrEqual, arg1GPR, GPRInfo::tagTypeNumberRegister);
slowPathCases.append(m_jit.branchTestPtr(JITCompiler::NonZero, arg1GPR, GPRInfo::tagTypeNumberRegister));
leftOK.link(&m_jit);
JITCompiler::Jump rightOK = m_jit.branchPtr(JITCompiler::AboveOrEqual, arg2GPR, GPRInfo::tagTypeNumberRegister);
slowPathCases.append(m_jit.branchTestPtr(JITCompiler::NonZero, arg2GPR, GPRInfo::tagTypeNumberRegister));
rightOK.link(&m_jit);
m_jit.comparePtr(invert ? JITCompiler::NotEqual : JITCompiler::Equal, arg1GPR, arg2GPR, resultGPR);
m_jit.or32(JITCompiler::TrustedImm32(ValueFalse), resultGPR);
JITCompiler::Jump done = m_jit.jump();
twoCellsCase.link(&m_jit);
slowPathCases.append(m_jit.branchPtr(JITCompiler::NotEqual, arg1GPR, arg2GPR));
m_jit.move(JITCompiler::TrustedImmPtr(JSValue::encode(jsBoolean(!invert))), resultGPR);
addSlowPathGenerator(
adoptPtr(
new CompareAndBoxBooleanSlowPathGenerator<MacroAssembler::JumpList>(
slowPathCases, this, operationCompareStrictEq, resultGPR, arg1GPR,
arg2GPR)));
done.link(&m_jit);
}
jsValueResult(resultGPR, m_compileIndex, DataFormatJSBoolean, 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 calleeGPR = callee.gpr();
use(calleeEdge);
// The call instruction's first child is the function; the 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, callFrameSlot(RegisterFile::CallerFrame));
m_jit.storePtr(calleeGPR, callFrameSlot(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 argGPR = arg.gpr();
use(argEdge);
m_jit.storePtr(argGPR, argumentSlot(i + dummyThisArgument));
}
flushRegisters();
GPRResult result(this);
GPRReg resultGPR = result.gpr();
JITCompiler::DataLabelPtr targetToCheck;
JITCompiler::Jump slowPath;
CallBeginToken token;
m_jit.beginCall(node.codeOrigin, token);
m_jit.addPtr(TrustedImm32(m_jit.codeBlock()->m_numCalleeRegisters * sizeof(Register)), GPRInfo::callFrameRegister);
slowPath = m_jit.branchPtrWithPatch(MacroAssembler::NotEqual, calleeGPR, targetToCheck, MacroAssembler::TrustedImmPtr(JSValue::encode(JSValue())));
m_jit.loadPtr(MacroAssembler::Address(calleeGPR, OBJECT_OFFSETOF(JSFunction, m_scope)), resultGPR);
m_jit.storePtr(resultGPR, MacroAssembler::Address(GPRInfo::callFrameRegister, static_cast<ptrdiff_t>(sizeof(Register)) * RegisterFile::ScopeChain));
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);
m_jit.move(calleeGPR, GPRInfo::nonArgGPR0);
m_jit.prepareForExceptionCheck();
JITCompiler::Call slowCall = m_jit.nearCall();
m_jit.notifyCall(slowCall, codeOrigin, token);
done.link(&m_jit);
m_jit.move(GPRInfo::returnValueGPR, resultGPR);
jsValueResult(resultGPR, 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
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() && !isInt32Constant(nodeIndex)) || info.spillFormat() == DataFormatDouble) {
terminateSpeculativeExecution(Uncountable, JSValueRegs(), NoNode);
returnFormat = DataFormatInteger;
return allocate();
}
GPRReg gpr = allocate();
if (node.hasConstant()) {
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
ASSERT(isInt32Constant(nodeIndex));
m_jit.move(MacroAssembler::Imm32(valueOfInt32Constant(nodeIndex)), gpr);
info.fillInteger(*m_stream, gpr);
returnFormat = DataFormatInteger;
return gpr;
}
DataFormat spillFormat = info.spillFormat();
ASSERT((spillFormat & DataFormatJS) || spillFormat == DataFormatInteger);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
if (spillFormat == DataFormatJSInteger || spillFormat == DataFormatInteger) {
// If we know this was spilled as an integer we can fill without checking.
if (strict) {
m_jit.load32(JITCompiler::addressFor(virtualRegister), gpr);
info.fillInteger(*m_stream, gpr);
returnFormat = DataFormatInteger;
return gpr;
}
if (spillFormat == DataFormatInteger) {
m_jit.load32(JITCompiler::addressFor(virtualRegister), gpr);
m_jit.orPtr(GPRInfo::tagTypeNumberRegister, gpr);
} else
m_jit.loadPtr(JITCompiler::addressFor(virtualRegister), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJSInteger);
returnFormat = DataFormatJSInteger;
return gpr;
}
m_jit.loadPtr(JITCompiler::addressFor(virtualRegister), gpr);
// Fill as JSValue, and fall through.
info.fillJSValue(*m_stream, gpr, DataFormatJSInteger);
m_gprs.unlock(gpr);
}
case DataFormatJS: {
// Check the value is an integer.
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
if (!isInt32Speculation(type))
speculationCheck(BadType, JSValueRegs(gpr), nodeIndex, m_jit.branchPtr(MacroAssembler::Below, gpr, GPRInfo::tagTypeNumberRegister));
info.fillJSValue(*m_stream, gpr, DataFormatJSInteger);
// If !strict we're done, return.
if (!strict) {
returnFormat = DataFormatJSInteger;
return gpr;
}
// else fall through & handle as DataFormatJSInteger.
m_gprs.unlock(gpr);
}
case DataFormatJSInteger: {
// In a strict fill we need to strip off the value tag.
if (strict) {
GPRReg gpr = info.gpr();
GPRReg result;
// If the register has already been locked we need to take a copy.
// If not, we'll zero extend in place, so mark on the info that this is now type DataFormatInteger, not DataFormatJSInteger.
if (m_gprs.isLocked(gpr))
result = allocate();
else {
m_gprs.lock(gpr);
info.fillInteger(*m_stream, gpr);
result = gpr;
}
m_jit.zeroExtend32ToPtr(gpr, result);
returnFormat = DataFormatInteger;
return result;
}
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
returnFormat = DataFormatJSInteger;
return gpr;
}
case DataFormatInteger: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
returnFormat = DataFormatInteger;
return gpr;
}
case DataFormatDouble:
case DataFormatJSDouble: {
if (node.hasConstant() && isInt32Constant(nodeIndex)) {
GPRReg gpr = allocate();
ASSERT(isInt32Constant(nodeIndex));
m_jit.move(MacroAssembler::Imm32(valueOfInt32Constant(nodeIndex)), gpr);
returnFormat = DataFormatInteger;
return gpr;
}
}
case DataFormatCell:
case DataFormatBoolean:
case DataFormatJSCell:
case DataFormatJSBoolean: {
terminateSpeculativeExecution(Uncountable, JSValueRegs(), NoNode);
returnFormat = DataFormatInteger;
return allocate();
}
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
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()) {
GPRReg gpr = allocate();
if (isInt32Constant(nodeIndex)) {
FPRReg fpr = fprAllocate();
m_jit.move(MacroAssembler::ImmPtr(reinterpret_cast<void*>(reinterpretDoubleToIntptr(static_cast<double>(valueOfInt32Constant(nodeIndex))))), gpr);
m_jit.movePtrToDouble(gpr, fpr);
unlock(gpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
return fpr;
}
if (isNumberConstant(nodeIndex)) {
FPRReg fpr = fprAllocate();
m_jit.move(MacroAssembler::ImmPtr(reinterpret_cast<void*>(reinterpretDoubleToIntptr(valueOfNumberConstant(nodeIndex)))), gpr);
m_jit.movePtrToDouble(gpr, fpr);
unlock(gpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
return fpr;
}
terminateSpeculativeExecution(Uncountable, JSValueRegs(), NoNode);
return fprAllocate();
}
DataFormat spillFormat = info.spillFormat();
switch (spillFormat) {
case DataFormatDouble: {
FPRReg fpr = fprAllocate();
m_jit.loadDouble(JITCompiler::addressFor(virtualRegister), fpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
return fpr;
}
case DataFormatInteger: {
GPRReg gpr = allocate();
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.load32(JITCompiler::addressFor(virtualRegister), gpr);
info.fillInteger(*m_stream, gpr);
unlock(gpr);
break;
}
default:
GPRReg gpr = allocate();
ASSERT(spillFormat & DataFormatJS);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.loadPtr(JITCompiler::addressFor(virtualRegister), gpr);
info.fillJSValue(*m_stream, gpr, spillFormat);
unlock(gpr);
break;
}
}
switch (info.registerFormat()) {
case DataFormatNone: // Should have filled, above.
case DataFormatBoolean: // This type never occurs.
case DataFormatStorage:
ASSERT_NOT_REACHED();
case DataFormatCell:
terminateSpeculativeExecution(Uncountable, JSValueRegs(), NoNode);
return fprAllocate();
case DataFormatJSCell:
case DataFormatJS:
case DataFormatJSBoolean: {
GPRReg jsValueGpr = info.gpr();
m_gprs.lock(jsValueGpr);
FPRReg fpr = fprAllocate();
GPRReg tempGpr = allocate();
JITCompiler::Jump isInteger = m_jit.branchPtr(MacroAssembler::AboveOrEqual, jsValueGpr, GPRInfo::tagTypeNumberRegister);
if (!isNumberSpeculation(type))
speculationCheck(BadType, JSValueRegs(jsValueGpr), nodeIndex, m_jit.branchTestPtr(MacroAssembler::Zero, jsValueGpr, GPRInfo::tagTypeNumberRegister));
// First, if we get here we have a double encoded as a JSValue
m_jit.move(jsValueGpr, tempGpr);
unboxDouble(tempGpr, fpr);
JITCompiler::Jump hasUnboxedDouble = m_jit.jump();
// Finally, handle integers.
isInteger.link(&m_jit);
m_jit.convertInt32ToDouble(jsValueGpr, fpr);
hasUnboxedDouble.link(&m_jit);
m_gprs.release(jsValueGpr);
m_gprs.unlock(jsValueGpr);
m_gprs.unlock(tempGpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
info.killSpilled();
return fpr;
}
case DataFormatJSInteger:
case DataFormatInteger: {
FPRReg fpr = fprAllocate();
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
m_jit.convertInt32ToDouble(gpr, fpr);
m_gprs.unlock(gpr);
return fpr;
}
// Unbox the double
case DataFormatJSDouble: {
GPRReg gpr = info.gpr();
FPRReg fpr = fprAllocate();
if (m_gprs.isLocked(gpr)) {
// Make sure we don't trample gpr if it is in use.
GPRReg temp = allocate();
m_jit.move(gpr, temp);
unboxDouble(temp, fpr);
unlock(temp);
} else
unboxDouble(gpr, fpr);
m_gprs.release(gpr);
m_fprs.retain(fpr, virtualRegister, SpillOrderDouble);
info.fillDouble(*m_stream, fpr);
return fpr;
}
case DataFormatDouble: {
FPRReg fpr = info.fpr();
m_fprs.lock(fpr);
return fpr;
}
default:
ASSERT_NOT_REACHED();
return InvalidFPRReg;
}
}
GPRReg SpeculativeJIT::fillSpeculateCell(NodeIndex nodeIndex, bool isForwardSpeculation)
{
#if DFG_ENABLE(DEBUG_VERBOSE)
dataLog("SpecCell@%d ", nodeIndex);
#endif
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 (info.spillFormat() == DataFormatInteger || info.spillFormat() == DataFormatDouble) {
terminateSpeculativeExecutionWithConditionalDirection(Uncountable, JSValueRegs(), NoNode, isForwardSpeculation);
return allocate();
}
GPRReg gpr = allocate();
if (node.hasConstant()) {
JSValue jsValue = valueOfJSConstant(nodeIndex);
if (jsValue.isCell()) {
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
m_jit.move(MacroAssembler::TrustedImmPtr(jsValue.asCell()), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJSCell);
return gpr;
}
terminateSpeculativeExecutionWithConditionalDirection(Uncountable, JSValueRegs(), NoNode, isForwardSpeculation);
return gpr;
}
ASSERT(info.spillFormat() & DataFormatJS);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.loadPtr(JITCompiler::addressFor(virtualRegister), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJS);
if (!isCellSpeculation(type))
speculationCheckWithConditionalDirection(BadType, JSValueRegs(gpr), nodeIndex, m_jit.branchTestPtr(MacroAssembler::NonZero, gpr, GPRInfo::tagMaskRegister), isForwardSpeculation);
info.fillJSValue(*m_stream, gpr, DataFormatJSCell);
return gpr;
}
case DataFormatCell:
case DataFormatJSCell: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
return gpr;
}
case DataFormatJS: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
if (!isCellSpeculation(type))
speculationCheckWithConditionalDirection(BadType, JSValueRegs(gpr), nodeIndex, m_jit.branchTestPtr(MacroAssembler::NonZero, gpr, GPRInfo::tagMaskRegister), isForwardSpeculation);
info.fillJSValue(*m_stream, gpr, DataFormatJSCell);
return gpr;
}
case DataFormatJSInteger:
case DataFormatInteger:
case DataFormatJSDouble:
case DataFormatDouble:
case DataFormatJSBoolean:
case DataFormatBoolean: {
terminateSpeculativeExecutionWithConditionalDirection(Uncountable, JSValueRegs(), NoNode, isForwardSpeculation);
return allocate();
}
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 = at(nodeIndex);
VirtualRegister virtualRegister = node.virtualRegister();
GenerationInfo& info = m_generationInfo[virtualRegister];
switch (info.registerFormat()) {
case DataFormatNone: {
if (info.spillFormat() == DataFormatInteger || info.spillFormat() == DataFormatDouble) {
terminateSpeculativeExecution(Uncountable, JSValueRegs(), NoNode);
return allocate();
}
GPRReg gpr = allocate();
if (node.hasConstant()) {
JSValue jsValue = valueOfJSConstant(nodeIndex);
if (jsValue.isBoolean()) {
m_gprs.retain(gpr, virtualRegister, SpillOrderConstant);
m_jit.move(MacroAssembler::TrustedImmPtr(JSValue::encode(jsValue)), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJSBoolean);
return gpr;
}
terminateSpeculativeExecution(Uncountable, JSValueRegs(), NoNode);
return gpr;
}
ASSERT(info.spillFormat() & DataFormatJS);
m_gprs.retain(gpr, virtualRegister, SpillOrderSpilled);
m_jit.loadPtr(JITCompiler::addressFor(virtualRegister), gpr);
info.fillJSValue(*m_stream, gpr, DataFormatJS);
if (!isBooleanSpeculation(type)) {
m_jit.xorPtr(TrustedImm32(static_cast<int32_t>(ValueFalse)), gpr);
speculationCheck(BadType, JSValueRegs(gpr), nodeIndex, m_jit.branchTestPtr(MacroAssembler::NonZero, gpr, TrustedImm32(static_cast<int32_t>(~1))), SpeculationRecovery(BooleanSpeculationCheck, gpr, InvalidGPRReg));
m_jit.xorPtr(TrustedImm32(static_cast<int32_t>(ValueFalse)), gpr);
}
info.fillJSValue(*m_stream, gpr, DataFormatJSBoolean);
return gpr;
}
case DataFormatBoolean:
case DataFormatJSBoolean: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
return gpr;
}
case DataFormatJS: {
GPRReg gpr = info.gpr();
m_gprs.lock(gpr);
if (!isBooleanSpeculation(type)) {
m_jit.xorPtr(TrustedImm32(static_cast<int32_t>(ValueFalse)), gpr);
speculationCheck(BadType, JSValueRegs(gpr), nodeIndex, m_jit.branchTestPtr(MacroAssembler::NonZero, gpr, TrustedImm32(static_cast<int32_t>(~1))), SpeculationRecovery(BooleanSpeculationCheck, gpr, InvalidGPRReg));
m_jit.xorPtr(TrustedImm32(static_cast<int32_t>(ValueFalse)), gpr);
}
info.fillJSValue(*m_stream, gpr, DataFormatJSBoolean);
return gpr;
}
case DataFormatJSInteger:
case DataFormatInteger:
case DataFormatJSDouble:
case DataFormatDouble:
case DataFormatJSCell:
case DataFormatCell: {
terminateSpeculativeExecution(Uncountable, JSValueRegs(), NoNode);
return allocate();
}
case DataFormatStorage:
ASSERT_NOT_REACHED();
default:
ASSERT_NOT_REACHED();
return InvalidGPRReg;
}
}
JITCompiler::Jump SpeculativeJIT::convertToDouble(GPRReg value, FPRReg result, GPRReg tmp)
{
JITCompiler::Jump isInteger = m_jit.branchPtr(MacroAssembler::AboveOrEqual, value, GPRInfo::tagTypeNumberRegister);
JITCompiler::Jump notNumber = m_jit.branchTestPtr(MacroAssembler::Zero, value, GPRInfo::tagTypeNumberRegister);
m_jit.move(value, tmp);
unboxDouble(tmp, result);
JITCompiler::Jump done = m_jit.jump();
isInteger.link(&m_jit);
m_jit.convertInt32ToDouble(value, result);
done.link(&m_jit);
return notNumber;
}
void SpeculativeJIT::compileObjectEquality(Node& node)
{
SpeculateCellOperand op1(this, node.child1());
SpeculateCellOperand op2(this, node.child2());
GPRTemporary result(this, op1);
GPRReg op1GPR = op1.gpr();
GPRReg op2GPR = op2.gpr();
GPRReg resultGPR = result.gpr();
if (m_jit.graph().globalObjectFor(node.codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(node.codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
speculationCheck(BadType, JSValueRegs(op1GPR), node.child1().index(),
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(op1GPR, JSCell::structureOffset()),
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueRegs(op2GPR), node.child2().index(),
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, JSValueRegs(op1GPR), node.child1().index(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueRegs(op1GPR), node.child1().index(),
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(structureGPR, Structure::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined)));
m_jit.loadPtr(MacroAssembler::Address(op2GPR, JSCell::structureOffset()), structureGPR);
speculationCheck(BadType, JSValueRegs(op2GPR), node.child2().index(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueRegs(op2GPR), node.child2().index(),
m_jit.branchTest8(
MacroAssembler::NonZero,
MacroAssembler::Address(structureGPR, Structure::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined)));
}
MacroAssembler::Jump falseCase = m_jit.branchPtr(MacroAssembler::NotEqual, op1GPR, op2GPR);
m_jit.move(TrustedImm32(ValueTrue), resultGPR);
MacroAssembler::Jump done = m_jit.jump();
falseCase.link(&m_jit);
m_jit.move(TrustedImm32(ValueFalse), resultGPR);
done.link(&m_jit);
jsValueResult(resultGPR, m_compileIndex, DataFormatJSBoolean);
}
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 op2GPR = op2.gpr();
GPRReg resultGPR = result.gpr();
if (m_jit.graph().globalObjectFor(leftNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(leftNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
speculationCheck(BadType, JSValueRegs(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, JSValueRegs(op1GPR), leftChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueRegs(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.branchTestPtr(MacroAssembler::NonZero, op2GPR, GPRInfo::tagMaskRegister);
// 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(op2GPR), rightChild.index(),
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(op2GPR, JSCell::structureOffset()), structureGPR);
speculationCheck(BadType, JSValueRegs(op2GPR), rightChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueRegs(op2GPR), 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, op2GPR);
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(op2GPR, resultGPR);
m_jit.andPtr(MacroAssembler::TrustedImm32(~TagBitUndefined), resultGPR);
speculationCheck(
BadType, JSValueRegs(op2GPR), rightChild.index(),
m_jit.branchPtr(
MacroAssembler::NotEqual, resultGPR,
MacroAssembler::TrustedImmPtr(reinterpret_cast<void*>(ValueNull))));
}
falseCase.link(&m_jit);
m_jit.move(TrustedImm32(ValueFalse), resultGPR);
MacroAssembler::Jump done = m_jit.jump();
trueCase.link(&m_jit);
m_jit.move(TrustedImm32(ValueTrue), resultGPR);
done.link(&m_jit);
jsValueResult(resultGPR, m_compileIndex, DataFormatJSBoolean);
}
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 op2GPR = op2.gpr();
GPRReg resultGPR = result.gpr();
if (m_jit.graph().globalObjectFor(branchNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(branchNode.codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
speculationCheck(BadType, JSValueRegs(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, JSValueRegs(op1GPR), leftChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueRegs(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.branchTestPtr(MacroAssembler::NonZero, op2GPR, GPRInfo::tagMaskRegister);
// 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(op2GPR), rightChild.index(),
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(op2GPR, JSCell::structureOffset()), structureGPR);
speculationCheck(BadType, JSValueRegs(op2GPR), rightChild.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
speculationCheck(BadType, JSValueRegs(op2GPR), 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.
branchPtr(MacroAssembler::Equal, op1GPR, op2GPR, taken);
// We know that within this branch, rightChild must not be a cell. Check if that is enough to
// prove that it is either null or undefined.
if (isOtherOrEmptySpeculation(m_state.forNode(rightChild).m_type & ~SpecCell))
rightNotCell.link(&m_jit);
else {
jump(notTaken, ForceJump);
rightNotCell.link(&m_jit);
m_jit.move(op2GPR, resultGPR);
m_jit.andPtr(MacroAssembler::TrustedImm32(~TagBitUndefined), resultGPR);
speculationCheck(
BadType, JSValueRegs(op2GPR), rightChild.index(),
m_jit.branchPtr(
MacroAssembler::NotEqual, resultGPR,
MacroAssembler::TrustedImmPtr(reinterpret_cast<void*>(ValueNull))));
}
jump(notTaken);
}
void SpeculativeJIT::compileIntegerCompare(Node& node, MacroAssembler::RelationalCondition condition)
{
SpeculateIntegerOperand op1(this, node.child1());
SpeculateIntegerOperand op2(this, node.child2());
GPRTemporary result(this, op1, op2);
m_jit.compare32(condition, op1.gpr(), op2.gpr(), result.gpr());
// If we add a DataFormatBool, we should use it here.
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
}
void SpeculativeJIT::compileDoubleCompare(Node& node, MacroAssembler::DoubleCondition condition)
{
SpeculateDoubleOperand op1(this, node.child1());
SpeculateDoubleOperand op2(this, node.child2());
GPRTemporary result(this);
m_jit.move(TrustedImm32(ValueTrue), result.gpr());
MacroAssembler::Jump trueCase = m_jit.branchDouble(condition, op1.fpr(), op2.fpr());
m_jit.xorPtr(TrustedImm32(true), result.gpr());
trueCase.link(&m_jit);
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
}
void SpeculativeJIT::compileValueAdd(Node& node)
{
JSValueOperand op1(this, node.child1());
JSValueOperand op2(this, node.child2());
GPRReg op1GPR = op1.gpr();
GPRReg op2GPR = op2.gpr();
flushRegisters();
GPRResult result(this);
if (isKnownNotNumber(node.child1().index()) || isKnownNotNumber(node.child2().index()))
callOperation(operationValueAddNotNumber, result.gpr(), op1GPR, op2GPR);
else
callOperation(operationValueAdd, result.gpr(), op1GPR, op2GPR);
jsValueResult(result.gpr(), m_compileIndex);
}
void SpeculativeJIT::compileNonStringCellOrOtherLogicalNot(Edge nodeUse, bool needSpeculationCheck)
{
JSValueOperand value(this, nodeUse);
GPRTemporary result(this);
GPRReg valueGPR = value.gpr();
GPRReg resultGPR = result.gpr();
MacroAssembler::Jump notCell = m_jit.branchTestPtr(MacroAssembler::NonZero, valueGPR, GPRInfo::tagMaskRegister);
if (m_jit.graph().globalObjectFor(m_jit.graph()[nodeUse.index()].codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(m_jit.graph()[nodeUse.index()].codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
if (needSpeculationCheck) {
speculationCheck(BadType, JSValueRegs(valueGPR), nodeUse,
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(valueGPR, JSCell::structureOffset()),
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
}
} else {
GPRTemporary structure(this);
GPRReg structureGPR = structure.gpr();
m_jit.loadPtr(MacroAssembler::Address(valueGPR, JSCell::structureOffset()), structureGPR);
if (needSpeculationCheck) {
speculationCheck(BadType, JSValueRegs(valueGPR), nodeUse,
m_jit.branchPtr(
MacroAssembler::Equal,
structureGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
}
MacroAssembler::Jump isNotMasqueradesAsUndefined =
m_jit.branchTest8(
MacroAssembler::Zero,
MacroAssembler::Address(structureGPR, Structure::typeInfoFlagsOffset()),
MacroAssembler::TrustedImm32(MasqueradesAsUndefined));
speculationCheck(BadType, JSValueRegs(valueGPR), nodeUse,
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(structureGPR, Structure::globalObjectOffset()),
MacroAssembler::TrustedImmPtr(m_jit.graph().globalObjectFor(m_jit.graph()[nodeUse.index()].codeOrigin))));
isNotMasqueradesAsUndefined.link(&m_jit);
}
m_jit.move(TrustedImm32(ValueFalse), resultGPR);
MacroAssembler::Jump done = m_jit.jump();
notCell.link(&m_jit);
if (needSpeculationCheck) {
m_jit.move(valueGPR, resultGPR);
m_jit.andPtr(MacroAssembler::TrustedImm32(~TagBitUndefined), resultGPR);
speculationCheck(BadType, JSValueRegs(valueGPR), nodeUse,
m_jit.branchPtr(
MacroAssembler::NotEqual,
resultGPR,
MacroAssembler::TrustedImmPtr(reinterpret_cast<void*>(ValueNull))));
}
m_jit.move(TrustedImm32(ValueTrue), resultGPR);
done.link(&m_jit);
jsValueResult(resultGPR, m_compileIndex, DataFormatJSBoolean);
}
void SpeculativeJIT::compileLogicalNot(Node& node)
{
if (at(node.child1()).shouldSpeculateNonStringCellOrOther()) {
compileNonStringCellOrOtherLogicalNot(node.child1(),
!isNonStringCellOrOtherSpeculation(m_state.forNode(node.child1()).m_type));
return;
}
if (at(node.child1()).shouldSpeculateInteger()) {
SpeculateIntegerOperand value(this, node.child1());
GPRTemporary result(this, value);
m_jit.compare32(MacroAssembler::Equal, value.gpr(), MacroAssembler::TrustedImm32(0), result.gpr());
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
return;
}
if (at(node.child1()).shouldSpeculateNumber()) {
SpeculateDoubleOperand value(this, node.child1());
FPRTemporary scratch(this);
GPRTemporary result(this);
m_jit.move(TrustedImm32(ValueFalse), result.gpr());
MacroAssembler::Jump nonZero = m_jit.branchDoubleNonZero(value.fpr(), scratch.fpr());
m_jit.xor32(TrustedImm32(true), result.gpr());
nonZero.link(&m_jit);
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
return;
}
SpeculatedType prediction = m_jit.getSpeculation(node.child1());
if (isBooleanSpeculation(prediction)) {
if (isBooleanSpeculation(m_state.forNode(node.child1()).m_type)) {
SpeculateBooleanOperand value(this, node.child1());
GPRTemporary result(this, value);
m_jit.move(value.gpr(), result.gpr());
m_jit.xorPtr(TrustedImm32(true), result.gpr());
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
return;
}
JSValueOperand value(this, node.child1());
GPRTemporary result(this); // FIXME: We could reuse, but on speculation fail would need recovery to restore tag (akin to add).
m_jit.move(value.gpr(), result.gpr());
m_jit.xorPtr(TrustedImm32(static_cast<int32_t>(ValueFalse)), result.gpr());
speculationCheck(BadType, JSValueRegs(value.gpr()), node.child1(), m_jit.branchTestPtr(JITCompiler::NonZero, result.gpr(), TrustedImm32(static_cast<int32_t>(~1))));
m_jit.xorPtr(TrustedImm32(static_cast<int32_t>(ValueTrue)), result.gpr());
// If we add a DataFormatBool, we should use it here.
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
return;
}
JSValueOperand arg1(this, node.child1());
GPRTemporary result(this);
GPRReg arg1GPR = arg1.gpr();
GPRReg resultGPR = result.gpr();
arg1.use();
m_jit.move(arg1GPR, resultGPR);
m_jit.xorPtr(TrustedImm32(static_cast<int32_t>(ValueFalse)), resultGPR);
JITCompiler::Jump slowCase = m_jit.branchTestPtr(JITCompiler::NonZero, resultGPR, TrustedImm32(static_cast<int32_t>(~1)));
addSlowPathGenerator(
slowPathCall(slowCase, this, dfgConvertJSValueToBoolean, resultGPR, arg1GPR));
m_jit.xorPtr(TrustedImm32(static_cast<int32_t>(ValueTrue)), resultGPR);
jsValueResult(resultGPR, m_compileIndex, DataFormatJSBoolean, UseChildrenCalledExplicitly);
}
void SpeculativeJIT::emitNonStringCellOrOtherBranch(Edge nodeUse, BlockIndex taken, BlockIndex notTaken, bool needSpeculationCheck)
{
JSValueOperand value(this, nodeUse);
GPRTemporary scratch(this);
GPRReg valueGPR = value.gpr();
GPRReg scratchGPR = scratch.gpr();
MacroAssembler::Jump notCell = m_jit.branchTestPtr(MacroAssembler::NonZero, valueGPR, GPRInfo::tagMaskRegister);
if (m_jit.graph().globalObjectFor(m_jit.graph()[nodeUse.index()].codeOrigin)->masqueradesAsUndefinedWatchpoint()->isStillValid()) {
m_jit.graph().globalObjectFor(m_jit.graph()[nodeUse.index()].codeOrigin)->masqueradesAsUndefinedWatchpoint()->add(speculationWatchpoint());
if (needSpeculationCheck) {
speculationCheck(BadType, JSValueRegs(valueGPR), nodeUse.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(valueGPR, JSCell::structureOffset()),
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
}
} else {
m_jit.loadPtr(MacroAssembler::Address(valueGPR, JSCell::structureOffset()), scratchGPR);
if (needSpeculationCheck) {
speculationCheck(BadType, JSValueRegs(valueGPR), nodeUse.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
scratchGPR,
MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
}
JITCompiler::Jump isNotMasqueradesAsUndefined = m_jit.branchTest8(JITCompiler::Zero, MacroAssembler::Address(scratchGPR, Structure::typeInfoFlagsOffset()), TrustedImm32(MasqueradesAsUndefined));
speculationCheck(BadType, JSValueRegs(valueGPR), nodeUse.index(),
m_jit.branchPtr(
MacroAssembler::Equal,
MacroAssembler::Address(scratchGPR, Structure::globalObjectOffset()),
MacroAssembler::TrustedImmPtr(m_jit.graph().globalObjectFor(m_jit.graph()[nodeUse.index()].codeOrigin))));
isNotMasqueradesAsUndefined.link(&m_jit);
}
jump(taken, ForceJump);
notCell.link(&m_jit);
if (needSpeculationCheck) {
m_jit.move(valueGPR, scratchGPR);
m_jit.andPtr(MacroAssembler::TrustedImm32(~TagBitUndefined), scratchGPR);
speculationCheck(BadType, JSValueRegs(valueGPR), nodeUse.index(), m_jit.branchPtr(MacroAssembler::NotEqual, scratchGPR, MacroAssembler::TrustedImmPtr(reinterpret_cast<void*>(ValueNull))));
}
jump(notTaken);
noResult(m_compileIndex);
}
void SpeculativeJIT::emitBranch(Node& node)
{
BlockIndex taken = node.takenBlockIndex();
BlockIndex notTaken = node.notTakenBlockIndex();
if (at(node.child1()).shouldSpeculateNonStringCellOrOther()) {
emitNonStringCellOrOtherBranch(node.child1(), taken, notTaken,
!isNonStringCellOrOtherSpeculation(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());
GPRReg valueGPR = value.gpr();
bool predictBoolean = isBooleanSpeculation(m_jit.getSpeculation(node.child1()));
if (predictBoolean) {
if (isBooleanSpeculation(m_state.forNode(node.child1()).m_type)) {
MacroAssembler::ResultCondition condition = MacroAssembler::NonZero;
if (taken == nextBlock()) {
condition = MacroAssembler::Zero;
BlockIndex tmp = taken;
taken = notTaken;
notTaken = tmp;
}
branchTest32(condition, valueGPR, TrustedImm32(true), taken);
jump(notTaken);
} else {
branchPtr(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImmPtr(JSValue::encode(jsBoolean(false))), notTaken);
branchPtr(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImmPtr(JSValue::encode(jsBoolean(true))), taken);
speculationCheck(BadType, JSValueRegs(valueGPR), node.child1(), m_jit.jump());
}
value.use();
} else {
GPRTemporary result(this);
GPRReg resultGPR = result.gpr();
branchPtr(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImmPtr(JSValue::encode(jsNumber(0))), notTaken);
branchPtr(MacroAssembler::AboveOrEqual, valueGPR, GPRInfo::tagTypeNumberRegister, taken);
if (!predictBoolean) {
branchPtr(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImmPtr(JSValue::encode(jsBoolean(false))), notTaken);
branchPtr(MacroAssembler::Equal, valueGPR, MacroAssembler::TrustedImmPtr(JSValue::encode(jsBoolean(true))), taken);
}
value.use();
silentSpillAllRegisters(resultGPR);
callOperation(dfgConvertJSValueToBoolean, resultGPR, valueGPR);
silentFillAllRegisters(resultGPR);
branchTest32(MacroAssembler::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;
}
}
GPRTemporary result(this);
m_jit.loadPtr(JITCompiler::addressFor(node.local()), result.gpr());
// Like jsValueResult, but don't useChildren - our children are phi nodes,
// and don't represent values within this dataflow with virtual registers.
VirtualRegister virtualRegister = node.virtualRegister();
m_gprs.retain(result.gpr(), virtualRegister, SpillOrderJS);
DataFormat format;
if (node.variableAccessData()->isCaptured())
format = DataFormatJS;
else if (isCellSpeculation(value.m_type))
format = DataFormatJSCell;
else if (isBooleanSpeculation(value.m_type))
format = DataFormatJSBoolean;
else
format = DataFormatJS;
m_generationInfo[virtualRegister].initJSValue(m_compileIndex, node.refCount(), result.gpr(), format);
break;
}
case GetLocalUnlinked: {
GPRTemporary result(this);
m_jit.loadPtr(JITCompiler::addressFor(node.unlinkedLocal()), result.gpr());
jsValueResult(result.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 (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::addressFor(node.local()));
noResult(m_compileIndex);
recordSetLocal(node.local(), ValueSource(CellInRegisterFile));
break;
}
if (isBooleanSpeculation(predictedType)) {
SpeculateBooleanOperand boolean(this, node.child1());
m_jit.storePtr(boolean.gpr(), JITCompiler::addressFor(node.local()));
noResult(m_compileIndex);
recordSetLocal(node.local(), ValueSource(BooleanInRegisterFile));
break;
}
}
JSValueOperand value(this, node.child1());
m_jit.storePtr(value.gpr(), JITCompiler::addressFor(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.branchPtr(MacroAssembler::AboveOrEqual, op1.gpr(), GPRInfo::tagTypeNumberRegister);
speculationCheck(
BadType, JSValueRegs(op1.gpr()), node.child1().index(),
m_jit.branchTestPtr(MacroAssembler::Zero, op1.gpr(), GPRInfo::tagTypeNumberRegister));
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()) {
compileIntegerArithDivForX86(node);
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);
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: {
JSValueOperand base(this, node.child1());
JSValueOperand property(this, node.child2());
GPRReg baseGPR = base.gpr();
GPRReg propertyGPR = property.gpr();
flushRegisters();
GPRResult result(this);
callOperation(operationGetByVal, result.gpr(), baseGPR, propertyGPR);
jsValueResult(result.gpr(), m_compileIndex);
break;
}
case Array::JSArray:
case Array::JSArrayOutOfBounds: {
SpeculateCellOperand base(this, node.child1());
SpeculateStrictInt32Operand property(this, node.child2());
StorageOperand storage(this, node.child3());
GPRReg baseReg = base.gpr();
GPRReg propertyReg = property.gpr();
GPRReg storageReg = storage.gpr();
if (!m_compileOkay)
return;
// We will have already speculated that the base is some kind of array,
// at this point.
MacroAssembler::Jump outOfBounds = m_jit.branch32(MacroAssembler::AboveOrEqual, propertyReg, MacroAssembler::Address(baseReg, JSArray::vectorLengthOffset()));
if (node.arrayMode() == Array::JSArray)
speculationCheck(OutOfBounds, JSValueRegs(), NoNode, outOfBounds);
GPRTemporary result(this);
m_jit.loadPtr(MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), result.gpr());
MacroAssembler::Jump hole = m_jit.branchTestPtr(MacroAssembler::Zero, result.gpr());
if (node.arrayMode() == Array::JSArray)
speculationCheck(OutOfBounds, JSValueRegs(), NoNode, hole);
else {
MacroAssembler::JumpList slowCases;
slowCases.append(outOfBounds);
slowCases.append(hole);
addSlowPathGenerator(
slowPathCall(
slowCases, this, operationGetByValArrayInt,
result.gpr(), baseReg, propertyReg));
}
jsValueResult(result.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);
JSValueOperand arg1(this, child1);
JSValueOperand arg2(this, child2);
JSValueOperand arg3(this, child3);
GPRReg arg1GPR = arg1.gpr();
GPRReg arg2GPR = arg2.gpr();
GPRReg arg3GPR = arg3.gpr();
flushRegisters();
callOperation(m_jit.strictModeFor(node.codeOrigin) ? operationPutByValStrict : operationPutByValNonStrict, arg1GPR, arg2GPR, arg3GPR);
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);
// Map base, property & value into registers, allocate a scratch register.
GPRReg valueReg = value.gpr();
if (!m_compileOkay)
return;
if (Heap::isWriteBarrierEnabled()) {
GPRTemporary scratch(this);
writeBarrier(baseReg, value.gpr(), child3, WriteBarrierForPropertyAccess, scratch.gpr());
}
StorageOperand storage(this, child4);
GPRReg storageReg = storage.gpr();
if (node.op() == PutByValAlias) {
// Store the value to the array.
GPRReg propertyReg = property.gpr();
GPRReg valueReg = value.gpr();
m_jit.storePtr(valueReg, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
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.branchTestPtr(MacroAssembler::NonZero, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
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.storePtr(valueReg, MacroAssembler::BaseIndex(storageReg, propertyReg, MacroAssembler::ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
if (arrayMode == Array::JSArrayOutOfBounds) {
addSlowPathGenerator(
slowPathCall(
beyondArrayBounds, this,
m_jit.codeBlock()->isStrictMode() ? operationPutByValBeyondArrayBoundsStrict : operationPutByValBeyondArrayBoundsNonStrict,
NoResult, baseReg, propertyReg, valueReg));
}
noResult(m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case Array::Arguments: {
JSValueOperand value(this, child3);
GPRTemporary scratch(this);
GPRTemporary scratch2(this);
GPRReg valueReg = value.gpr();
GPRReg scratchReg = scratch.gpr();
GPRReg scratch2Reg = scratch2.gpr();
if (!m_compileOkay)
return;
m_jit.loadPtr(
MacroAssembler::Address(baseReg, Arguments::offsetOfData()),
scratchReg);
// Two really lame checks.
speculationCheck(
Uncountable, JSValueSource(), NoNode,
m_jit.branchPtr(
MacroAssembler::AboveOrEqual, propertyReg,
MacroAssembler::Address(scratchReg, OBJECT_OFFSETOF(ArgumentsData, numArguments))));
speculationCheck(
Uncountable, JSValueSource(), NoNode,
m_jit.branchTestPtr(
MacroAssembler::NonZero,
MacroAssembler::Address(
scratchReg, OBJECT_OFFSETOF(ArgumentsData, deletedArguments))));
m_jit.move(propertyReg, scratch2Reg);
m_jit.neg32(scratch2Reg);
m_jit.signExtend32ToPtr(scratch2Reg, scratch2Reg);
m_jit.loadPtr(
MacroAssembler::Address(scratchReg, OBJECT_OFFSETOF(ArgumentsData, registers)),
scratchReg);
m_jit.storePtr(
valueReg,
MacroAssembler::BaseIndex(
scratchReg, scratch2Reg, MacroAssembler::TimesEight,
CallFrame::thisArgumentOffset() * sizeof(Register) - sizeof(Register)));
noResult(m_compileIndex);
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.
jsValueResult(result.gpr(), m_compileIndex);
break;
}
SpeculateCellOperand base(this, node.child1());
SpeculateCellOperand argument(this, node.child2());
GPRReg baseGPR = base.gpr();
GPRReg argumentGPR = argument.gpr();
flushRegisters();
GPRResult result(this);
callOperation(operationRegExpExec, result.gpr(), baseGPR, argumentGPR);
jsValueResult(result.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.
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
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 valueGPR = value.gpr();
GPRReg storageLengthGPR = storageLength.gpr();
if (Heap::isWriteBarrierEnabled()) {
GPRTemporary scratch(this);
writeBarrier(baseGPR, valueGPR, 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.storePtr(valueGPR, MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
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.orPtr(GPRInfo::tagTypeNumberRegister, storageLengthGPR);
addSlowPathGenerator(
slowPathCall(
slowPath, this, operationArrayPush, NoResult, storageLengthGPR,
valueGPR, baseGPR));
jsValueResult(storageLengthGPR, m_compileIndex);
break;
}
case ArrayPop: {
ASSERT(modeIsJSArray(node.arrayMode()));
SpeculateCellOperand base(this, node.child1());
StorageOperand storage(this, node.child2());
GPRTemporary value(this);
GPRTemporary storageLength(this);
GPRReg baseGPR = base.gpr();
GPRReg storageGPR = storage.gpr();
GPRReg valueGPR = value.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.loadPtr(MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])), valueGPR);
m_jit.store32(storageLengthGPR, MacroAssembler::Address(storageGPR, OBJECT_OFFSETOF(ArrayStorage, m_length)));
setUndefinedCases.append(m_jit.branchTestPtr(MacroAssembler::Zero, valueGPR));
m_jit.storePtr(MacroAssembler::TrustedImmPtr(0), MacroAssembler::BaseIndex(storageGPR, storageLengthGPR, MacroAssembler::ScalePtr, OBJECT_OFFSETOF(ArrayStorage, m_vector[0])));
m_jit.sub32(MacroAssembler::TrustedImm32(1), MacroAssembler::Address(storageGPR, OBJECT_OFFSETOF(ArrayStorage, m_numValuesInVector)));
addSlowPathGenerator(
slowPathMove(
setUndefinedCases, this,
MacroAssembler::TrustedImmPtr(JSValue::encode(jsUndefined())), valueGPR));
addSlowPathGenerator(
slowPathCall(
slowCase, this, operationArrayPop, valueGPR, baseGPR));
jsValueResult(valueGPR, 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::regT1);
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());
m_jit.move(op1.gpr(), GPRInfo::returnValueGPR);
// Grab the return address.
m_jit.emitGetFromCallFrameHeaderPtr(RegisterFile::ReturnPC, GPRInfo::regT1);
// Restore our caller's "r".
m_jit.emitGetFromCallFrameHeaderPtr(RegisterFile::CallerFrame, GPRInfo::callFrameRegister);
// Return.
m_jit.restoreReturnAddressBeforeReturn(GPRInfo::regT1);
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);
m_jit.move(op1.gpr(), result.gpr());
if (op1.format() == DataFormatInteger)
m_jit.orPtr(GPRInfo::tagTypeNumberRegister, result.gpr());
jsValueResult(result.gpr(), m_compileIndex);
break;
}
// FIXME: Add string speculation here.
JSValueOperand op1(this, node.child1());
GPRTemporary result(this, op1);
GPRReg op1GPR = op1.gpr();
GPRReg resultGPR = result.gpr();
op1.use();
if (!(m_state.forNode(node.child1()).m_type & ~(SpecNumber | SpecBoolean)))
m_jit.move(op1GPR, resultGPR);
else {
MacroAssembler::Jump alreadyPrimitive = m_jit.branchTestPtr(MacroAssembler::NonZero, op1GPR, GPRInfo::tagMaskRegister);
MacroAssembler::Jump notPrimitive = m_jit.branchPtr(MacroAssembler::NotEqual, MacroAssembler::Address(op1GPR, JSCell::structureOffset()), MacroAssembler::TrustedImmPtr(m_jit.globalData()->stringStructure.get()));
alreadyPrimitive.link(&m_jit);
m_jit.move(op1GPR, resultGPR);
addSlowPathGenerator(
slowPathCall(notPrimitive, this, operationToPrimitive, resultGPR, op1GPR));
}
jsValueResult(resultGPR, m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case NewArray: {
if (!node.numChildren()) {
flushRegisters();
GPRResult result(this);
callOperation(
operationNewEmptyArray, 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 opGPR = operand.gpr();
operand.use();
m_jit.storePtr(opGPR, buffer + operandIdx);
}
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 result(this);
callOperation(
operationNewArray, result.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());
}
cellResult(result.gpr(), m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case NewArrayWithSize: {
SpeculateStrictInt32Operand size(this, node.child1());
GPRReg sizeGPR = size.gpr();
flushRegisters();
GPRResult result(this);
callOperation(operationNewArrayWithSize, result.gpr(), m_jit.graph().globalObjectFor(node.codeOrigin)->arrayStructure(), sizeGPR);
cellResult(result.gpr(), m_compileIndex);
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 opGPR = operand.gpr();
operand.use();
m_jit.storePtr(opGPR, buffer + operandIdx);
}
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 result(this);
callOperation(operationStrCat, result.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());
}
cellResult(result.gpr(), m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case NewArrayBuffer: {
flushRegisters();
GPRResult result(this);
callOperation(operationNewArrayBuffer, result.gpr(), node.startConstant(), node.numConstants());
cellResult(result.gpr(), m_compileIndex);
break;
}
case NewRegexp: {
flushRegisters();
GPRResult result(this);
callOperation(operationNewRegexp, result.gpr(), m_jit.codeBlock()->regexp(node.regexpIndex()));
cellResult(result.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, thisValue);
GPRReg thisValueGPR = thisValue.gpr();
GPRReg scratchGPR = scratch.gpr();
if (!isOtherSpeculation(m_state.forNode(node.child1()).m_type)) {
m_jit.move(thisValueGPR, scratchGPR);
m_jit.andPtr(MacroAssembler::TrustedImm32(~TagBitUndefined), scratchGPR);
speculationCheck(BadType, JSValueRegs(thisValueGPR), node.child1(), m_jit.branchPtr(MacroAssembler::NotEqual, scratchGPR, MacroAssembler::TrustedImmPtr(reinterpret_cast<void*>(ValueNull))));
}
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());
GPRTemporary result(this, thisValue);
GPRReg thisValueGPR = thisValue.gpr();
GPRReg resultGPR = result.gpr();
if (!isObjectSpeculation(m_state.forNode(node.child1()).m_type))
speculationCheck(BadType, JSValueRegs(thisValueGPR), node.child1(), m_jit.branchPtr(JITCompiler::Equal, JITCompiler::Address(thisValueGPR, JSCell::structureOffset()), JITCompiler::TrustedImmPtr(m_jit.globalData()->stringStructure.get())));
m_jit.move(thisValueGPR, resultGPR);
cellResult(resultGPR, m_compileIndex);
break;
}
JSValueOperand thisValue(this, node.child1());
GPRReg thisValueGPR = thisValue.gpr();
flushRegisters();
GPRResult result(this);
callOperation(operationConvertThis, result.gpr(), thisValueGPR);
cellResult(result.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 result(this);
GPRReg resultGPR = result.gpr();
m_jit.loadPtr(JITCompiler::Address(scope.gpr(), JSVariableObject::offsetOfRegisters()), resultGPR);
m_jit.loadPtr(JITCompiler::Address(resultGPR, node.varNumber() * sizeof(Register)), resultGPR);
jsValueResult(resultGPR, 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.storePtr(value.gpr(), JITCompiler::Address(scratchGPR, node.varNumber() * sizeof(Register)));
writeBarrier(scope.gpr(), value.gpr(), 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 result(this, base);
GPRReg baseGPR = base.gpr();
GPRReg resultGPR = result.gpr();
base.use();
cachedGetById(node.codeOrigin, baseGPR, resultGPR, node.identifierNumber());
jsValueResult(resultGPR, m_compileIndex, UseChildrenCalledExplicitly);
break;
}
JSValueOperand base(this, node.child1());
GPRTemporary result(this, base);
GPRReg baseGPR = base.gpr();
GPRReg resultGPR = result.gpr();
base.use();
JITCompiler::Jump notCell = m_jit.branchTestPtr(JITCompiler::NonZero, baseGPR, GPRInfo::tagMaskRegister);
cachedGetById(node.codeOrigin, baseGPR, resultGPR, node.identifierNumber(), notCell);
jsValueResult(resultGPR, 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 result(this);
GPRReg resultGPR = result.gpr();
base.use();
flushRegisters();
cachedGetById(node.codeOrigin, baseGPR, resultGPR, node.identifierNumber(), JITCompiler::Jump(), DontSpill);
jsValueResult(resultGPR, m_compileIndex, UseChildrenCalledExplicitly);
break;
}
JSValueOperand base(this, node.child1());
GPRReg baseGPR = base.gpr();
GPRResult result(this);
GPRReg resultGPR = result.gpr();
base.use();
flushRegisters();
JITCompiler::Jump notCell = m_jit.branchTestPtr(JITCompiler::NonZero, baseGPR, GPRInfo::tagMaskRegister);
cachedGetById(node.codeOrigin, baseGPR, resultGPR, node.identifierNumber(), notCell, DontSpill);
jsValueResult(resultGPR, 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 result(this, storage);
GPRReg storageGPR = storage.gpr();
GPRReg resultGPR = result.gpr();
StorageAccessData& storageAccessData = m_jit.graph().m_storageAccessData[node.storageAccessDataIndex()];
m_jit.loadPtr(JITCompiler::Address(storageGPR, storageAccessData.offset * sizeof(EncodedJSValue)), resultGPR);
jsValueResult(resultGPR, 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 valueGPR = value.gpr();
#if ENABLE(GGC) || ENABLE(WRITE_BARRIER_PROFILING)
writeBarrier(base.gpr(), value.gpr(), node.child3(), WriteBarrierForPropertyAccess);
#endif
StorageAccessData& storageAccessData = m_jit.graph().m_storageAccessData[node.storageAccessDataIndex()];
m_jit.storePtr(valueGPR, JITCompiler::Address(storageGPR, storageAccessData.offset * sizeof(EncodedJSValue)));
noResult(m_compileIndex);
break;
}
case PutById: {
SpeculateCellOperand base(this, node.child1());
JSValueOperand value(this, node.child2());
GPRTemporary scratch(this);
GPRReg baseGPR = base.gpr();
GPRReg valueGPR = value.gpr();
GPRReg scratchGPR = scratch.gpr();
base.use();
value.use();
cachedPutById(node.codeOrigin, baseGPR, valueGPR, 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 valueGPR = value.gpr();
GPRReg scratchGPR = scratch.gpr();
base.use();
value.use();
cachedPutById(node.codeOrigin, baseGPR, valueGPR, node.child2(), scratchGPR, node.identifierNumber(), Direct);
noResult(m_compileIndex, UseChildrenCalledExplicitly);
break;
}
case GetGlobalVar: {
GPRTemporary result(this);
m_jit.loadPtr(node.registerPointer(), result.gpr());
jsValueResult(result.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.gpr(), node.child1(), WriteBarrierForVariableAccess, scratchReg);
}
m_jit.storePtr(value.gpr(), node.registerPointer());
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.gpr(), node.child1(), WriteBarrierForVariableAccess, scratchReg);
}
m_jit.storePtr(value.gpr(), node.registerPointer());
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.loadPtr(node.registerPointer(), scratchGPR);
JITCompiler::Jump ok = m_jit.branchPtr(
JITCompiler::Equal, scratchGPR,
TrustedImmPtr(bitwise_cast<void*>(JSValue::encode(node.registerPointer()->get()))));
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.branchTestPtr(JITCompiler::Zero, value.gpr(), GPRInfo::tagMaskRegister);
m_jit.comparePtr(JITCompiler::Equal, value.gpr(), TrustedImm32(ValueUndefined), 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.gpr(), 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.comparePtr(JITCompiler::Equal, localGlobalObjectGPR, remoteGlobalObjectGPR, result.gpr());
}
notMasqueradesAsUndefined.link(&m_jit);
done.link(&m_jit);
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
break;
}
case IsBoolean: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value);
m_jit.move(value.gpr(), result.gpr());
m_jit.xorPtr(JITCompiler::TrustedImm32(ValueFalse), result.gpr());
m_jit.testPtr(JITCompiler::Zero, result.gpr(), JITCompiler::TrustedImm32(static_cast<int32_t>(~1)), result.gpr());
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
break;
}
case IsNumber: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value);
m_jit.testPtr(JITCompiler::NonZero, value.gpr(), GPRInfo::tagTypeNumberRegister, result.gpr());
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
break;
}
case IsString: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value);
JITCompiler::Jump isNotCell = m_jit.branchTestPtr(JITCompiler::NonZero, value.gpr(), GPRInfo::tagMaskRegister);
m_jit.loadPtr(JITCompiler::Address(value.gpr(), JSCell::structureOffset()), result.gpr());
m_jit.compare8(JITCompiler::Equal, JITCompiler::Address(result.gpr(), Structure::typeInfoTypeOffset()), TrustedImm32(StringType), result.gpr());
m_jit.or32(TrustedImm32(ValueFalse), result.gpr());
JITCompiler::Jump done = m_jit.jump();
isNotCell.link(&m_jit);
m_jit.move(TrustedImm32(ValueFalse), result.gpr());
done.link(&m_jit);
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
break;
}
case IsObject: {
JSValueOperand value(this, node.child1());
GPRReg valueGPR = value.gpr();
GPRResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
callOperation(operationIsObject, resultGPR, valueGPR);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
break;
}
case IsFunction: {
JSValueOperand value(this, node.child1());
GPRReg valueGPR = value.gpr();
GPRResult result(this);
GPRReg resultGPR = result.gpr();
flushRegisters();
callOperation(operationIsFunction, resultGPR, valueGPR);
m_jit.or32(TrustedImm32(ValueFalse), resultGPR);
jsValueResult(result.gpr(), m_compileIndex, DataFormatJSBoolean);
break;
}
case Flush:
case Phi:
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 result(this);
callOperation(operationResolve, result.gpr(), identifier(node.identifierNumber()));
jsValueResult(result.gpr(), m_compileIndex);
break;
}
case ResolveBase: {
flushRegisters();
GPRResult result(this);
callOperation(operationResolveBase, result.gpr(), identifier(node.identifierNumber()));
jsValueResult(result.gpr(), m_compileIndex);
break;
}
case ResolveBaseStrictPut: {
flushRegisters();
GPRResult result(this);
callOperation(operationResolveBaseStrictPut, result.gpr(), identifier(node.identifierNumber()));
jsValueResult(result.gpr(), m_compileIndex);
break;
}
case ResolveGlobal: {
GPRTemporary globalObject(this);
GPRTemporary resolveInfo(this);
GPRTemporary result(this);
GPRReg globalObjectGPR = globalObject.gpr();
GPRReg resolveInfoGPR = resolveInfo.gpr();
GPRReg resultGPR = result.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)), resultGPR);
JITCompiler::Jump structuresDontMatch = m_jit.branchPtr(JITCompiler::NotEqual, resultGPR, JITCompiler::Address(globalObjectGPR, JSCell::structureOffset()));
// Fast case
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.loadPtr(JITCompiler::Address(globalObjectGPR, JSObject::offsetOfOutOfLineStorage()), resultGPR);
m_jit.loadPtr(JITCompiler::BaseIndex(resultGPR, resolveInfoGPR, JITCompiler::ScalePtr, (inlineStorageCapacity - 2) * static_cast<ptrdiff_t>(sizeof(JSValue))), resultGPR);
addSlowPathGenerator(
slowPathCall(
structuresDontMatch, this, operationResolveGlobal,
resultGPR, resolveInfoGPR, globalObjectGPR,
&m_jit.codeBlock()->identifier(data.identifierNumber)));
jsValueResult(resultGPR, m_compileIndex);
break;
}
case CreateActivation: {
ASSERT(!node.codeOrigin.inlineCallFrame);
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value);
GPRReg valueGPR = value.gpr();
GPRReg resultGPR = result.gpr();
m_jit.move(valueGPR, resultGPR);
JITCompiler::Jump notCreated = m_jit.branchTestPtr(JITCompiler::Zero, resultGPR);
addSlowPathGenerator(
slowPathCall(notCreated, this, operationCreateActivation, resultGPR));
cellResult(resultGPR, m_compileIndex);
break;
}
case CreateArguments: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value);
GPRReg valueGPR = value.gpr();
GPRReg resultGPR = result.gpr();
m_jit.move(valueGPR, resultGPR);
JITCompiler::Jump notCreated = m_jit.branchTestPtr(JITCompiler::Zero, resultGPR);
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: {
ASSERT(!node.codeOrigin.inlineCallFrame);
JSValueOperand activationValue(this, node.child1());
GPRReg activationValueGPR = activationValue.gpr();
JITCompiler::Jump created = m_jit.branchTestPtr(JITCompiler::NonZero, activationValueGPR);
addSlowPathGenerator(
slowPathCall(
created, this, operationTearOffActivation, NoResult, activationValueGPR));
noResult(m_compileIndex);
break;
}
case TearOffArguments: {
JSValueOperand unmodifiedArgumentsValue(this, node.child1());
JSValueOperand activationValue(this, node.child2());
GPRReg unmodifiedArgumentsValueGPR = unmodifiedArgumentsValue.gpr();
GPRReg activationValueGPR = activationValue.gpr();
JITCompiler::Jump created = m_jit.branchTestPtr(JITCompiler::NonZero, unmodifiedArgumentsValueGPR);
if (node.codeOrigin.inlineCallFrame) {
addSlowPathGenerator(
slowPathCall(
created, this, operationTearOffInlinedArguments, NoResult,
unmodifiedArgumentsValueGPR, activationValueGPR, node.codeOrigin.inlineCallFrame));
} else {
addSlowPathGenerator(
slowPathCall(
created, this, operationTearOffArguments, NoResult, unmodifiedArgumentsValueGPR, activationValueGPR));
}
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.branchTestPtr(
JITCompiler::NonZero,
JITCompiler::addressFor(
m_jit.argumentsRegisterFor(node.codeOrigin))));
}
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 result(this);
GPRReg resultGPR = result.gpr();
JITCompiler::Jump created = m_jit.branchTestPtr(
JITCompiler::NonZero,
JITCompiler::addressFor(
m_jit.argumentsRegisterFor(node.codeOrigin)));
if (node.codeOrigin.inlineCallFrame) {
m_jit.move(
ImmPtr(
bitwise_cast<void*>(
JSValue::encode(
jsNumber(node.codeOrigin.inlineCallFrame->arguments.size() - 1)))),
resultGPR);
} else {
m_jit.load32(JITCompiler::payloadFor(RegisterFile::ArgumentCount), resultGPR);
m_jit.sub32(TrustedImm32(1), resultGPR);
m_jit.orPtr(GPRInfo::tagTypeNumberRegister, resultGPR);
}
// 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, resultGPR,
m_jit.argumentsRegisterFor(node.codeOrigin)));
jsValueResult(resultGPR, m_compileIndex);
break;
}
case GetMyArgumentByVal: {
SpeculateStrictInt32Operand index(this, node.child1());
GPRTemporary result(this);
GPRReg indexGPR = index.gpr();
GPRReg resultGPR = result.gpr();
if (!isEmptySpeculation(
m_state.variables().operand(
m_jit.graph().argumentsRegisterFor(node.codeOrigin)).m_type)) {
speculationCheck(
ArgumentsEscaped, JSValueRegs(), NoNode,
m_jit.branchTestPtr(
JITCompiler::NonZero,
JITCompiler::addressFor(
m_jit.argumentsRegisterFor(node.codeOrigin))));
}
m_jit.add32(TrustedImm32(1), indexGPR, resultGPR);
if (node.codeOrigin.inlineCallFrame) {
speculationCheck(
Uncountable, JSValueRegs(), NoNode,
m_jit.branch32(
JITCompiler::AboveOrEqual,
resultGPR,
Imm32(node.codeOrigin.inlineCallFrame->arguments.size())));
} else {
speculationCheck(
Uncountable, JSValueRegs(), NoNode,
m_jit.branch32(
JITCompiler::AboveOrEqual,
resultGPR,
JITCompiler::payloadFor(RegisterFile::ArgumentCount)));
}
m_jit.neg32(resultGPR);
m_jit.signExtend32ToPtr(resultGPR, resultGPR);
m_jit.loadPtr(
JITCompiler::BaseIndex(
GPRInfo::callFrameRegister, resultGPR, JITCompiler::TimesEight,
((node.codeOrigin.inlineCallFrame
? node.codeOrigin.inlineCallFrame->stackOffset
: 0) + CallFrame::argumentOffsetIncludingThis(0)) * sizeof(Register)),
resultGPR);
jsValueResult(resultGPR, m_compileIndex);
break;
}
case GetMyArgumentByValSafe: {
SpeculateStrictInt32Operand index(this, node.child1());
GPRTemporary result(this);
GPRReg indexGPR = index.gpr();
GPRReg resultGPR = result.gpr();
JITCompiler::JumpList slowPath;
slowPath.append(
m_jit.branchTestPtr(
JITCompiler::NonZero,
JITCompiler::addressFor(
m_jit.argumentsRegisterFor(node.codeOrigin))));
m_jit.add32(TrustedImm32(1), indexGPR, resultGPR);
if (node.codeOrigin.inlineCallFrame) {
slowPath.append(
m_jit.branch32(
JITCompiler::AboveOrEqual,
resultGPR,
Imm32(node.codeOrigin.inlineCallFrame->arguments.size())));
} else {
slowPath.append(
m_jit.branch32(
JITCompiler::AboveOrEqual,
resultGPR,
JITCompiler::payloadFor(RegisterFile::ArgumentCount)));
}
m_jit.neg32(resultGPR);
m_jit.signExtend32ToPtr(resultGPR, resultGPR);
m_jit.loadPtr(
JITCompiler::BaseIndex(
GPRInfo::callFrameRegister, resultGPR, JITCompiler::TimesEight,
((node.codeOrigin.inlineCallFrame
? node.codeOrigin.inlineCallFrame->stackOffset
: 0) + CallFrame::argumentOffsetIncludingThis(0)) * sizeof(Register)),
resultGPR);
if (node.codeOrigin.inlineCallFrame) {
addSlowPathGenerator(
slowPathCall(
slowPath, this, operationGetInlinedArgumentByVal, resultGPR,
m_jit.argumentsRegisterFor(node.codeOrigin),
node.codeOrigin.inlineCallFrame,
indexGPR));
} else {
addSlowPathGenerator(
slowPathCall(
slowPath, this, operationGetArgumentByVal, resultGPR,
m_jit.argumentsRegisterFor(node.codeOrigin),
indexGPR));
}
jsValueResult(resultGPR, m_compileIndex);
break;
}
case CheckArgumentsNotCreated: {
ASSERT(!isEmptySpeculation(
m_state.variables().operand(
m_jit.graph().argumentsRegisterFor(node.codeOrigin)).m_type));
speculationCheck(
ArgumentsEscaped, JSValueRegs(), NoNode,
m_jit.branchTestPtr(
JITCompiler::NonZero,
JITCompiler::addressFor(
m_jit.argumentsRegisterFor(node.codeOrigin))));
noResult(m_compileIndex);
break;
}
case NewFunctionNoCheck:
compileNewFunctionNoCheck(node);
break;
case NewFunction: {
JSValueOperand value(this, node.child1());
GPRTemporary result(this, value);
GPRReg valueGPR = value.gpr();
GPRReg resultGPR = result.gpr();
m_jit.move(valueGPR, resultGPR);
JITCompiler::Jump notCreated = m_jit.branchTestPtr(JITCompiler::Zero, resultGPR);
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:
ASSERT_NOT_REACHED();
break;
case LastNodeType:
ASSERT_NOT_REACHED();
break;
}
if (!m_compileOkay)
return;
if (node.hasResult() && node.mustGenerate())
use(m_compileIndex);
}
#endif
} } // namespace JSC::DFG
#endif