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DFGFixupPhase.cpp
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1802 lines (1590 loc) · 66.4 KB
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/*
* Copyright (C) 2012, 2013 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 "DFGFixupPhase.h"
#if ENABLE(DFG_JIT)
#include "DFGGraph.h"
#include "DFGInsertionSet.h"
#include "DFGPhase.h"
#include "DFGPredictionPropagationPhase.h"
#include "DFGVariableAccessDataDump.h"
#include "Operations.h"
namespace JSC { namespace DFG {
class FixupPhase : public Phase {
public:
FixupPhase(Graph& graph)
: Phase(graph, "fixup")
, m_insertionSet(graph)
{
}
bool run()
{
ASSERT(m_graph.m_fixpointState == BeforeFixpoint);
ASSERT(m_graph.m_form == ThreadedCPS);
m_profitabilityChanged = false;
for (BlockIndex blockIndex = 0; blockIndex < m_graph.numBlocks(); ++blockIndex)
fixupBlock(m_graph.block(blockIndex));
while (m_profitabilityChanged) {
m_profitabilityChanged = false;
for (unsigned i = m_graph.m_argumentPositions.size(); i--;)
m_graph.m_argumentPositions[i].mergeArgumentUnboxingAwareness();
for (BlockIndex blockIndex = 0; blockIndex < m_graph.numBlocks(); ++blockIndex)
fixupSetLocalsInBlock(m_graph.block(blockIndex));
}
for (BlockIndex blockIndex = 0; blockIndex < m_graph.numBlocks(); ++blockIndex)
fixupUntypedSetLocalsInBlock(m_graph.block(blockIndex));
return true;
}
private:
void fixupBlock(BasicBlock* block)
{
if (!block)
return;
ASSERT(block->isReachable);
m_block = block;
for (m_indexInBlock = 0; m_indexInBlock < block->size(); ++m_indexInBlock) {
m_currentNode = block->at(m_indexInBlock);
fixupNode(m_currentNode);
}
m_insertionSet.execute(block);
}
void fixupNode(Node* node)
{
NodeType op = node->op();
switch (op) {
case SetLocal: {
// This gets handled by fixupSetLocalsInBlock().
return;
}
case BitOr: {
fixIntEdge(node->child1());
fixIntEdge(node->child2());
break;
}
case BitAnd:
case BitXor:
case BitRShift:
case BitLShift:
case BitURShift:
case ArithIMul: {
fixIntEdge(node->child1());
fixIntEdge(node->child2());
break;
}
case UInt32ToNumber: {
fixEdge<KnownInt32Use>(node->child1());
if (bytecodeCanTruncateInteger(node->arithNodeFlags()))
node->convertToIdentity();
break;
}
case DoubleAsInt32: {
RELEASE_ASSERT_NOT_REACHED();
break;
}
case ValueToInt32: {
if (node->child1()->shouldSpeculateInt32()) {
fixEdge<Int32Use>(node->child1());
node->setOpAndDefaultFlags(Identity);
break;
}
if (node->child1()->shouldSpeculateMachineInt()) {
fixEdge<MachineIntUse>(node->child1());
break;
}
if (node->child1()->shouldSpeculateNumber()) {
fixEdge<NumberUse>(node->child1());
break;
}
if (node->child1()->shouldSpeculateBoolean()) {
fixEdge<BooleanUse>(node->child1());
break;
}
fixEdge<NotCellUse>(node->child1());
break;
}
case Int32ToDouble: {
RELEASE_ASSERT_NOT_REACHED();
break;
}
case ValueAdd: {
if (attemptToMakeIntegerAdd(node)) {
node->setOp(ArithAdd);
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
if (Node::shouldSpeculateNumberExpectingDefined(node->child1().node(), node->child2().node())) {
fixEdge<NumberUse>(node->child1());
fixEdge<NumberUse>(node->child2());
node->setOp(ArithAdd);
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
// FIXME: Optimize for the case where one of the operands is the
// empty string. Also consider optimizing for the case where we don't
// believe either side is the emtpy string. Both of these things should
// be easy.
if (node->child1()->shouldSpeculateString()
&& attemptToMakeFastStringAdd<StringUse>(node, node->child1(), node->child2()))
break;
if (node->child2()->shouldSpeculateString()
&& attemptToMakeFastStringAdd<StringUse>(node, node->child2(), node->child1()))
break;
if (node->child1()->shouldSpeculateStringObject()
&& attemptToMakeFastStringAdd<StringObjectUse>(node, node->child1(), node->child2()))
break;
if (node->child2()->shouldSpeculateStringObject()
&& attemptToMakeFastStringAdd<StringObjectUse>(node, node->child2(), node->child1()))
break;
if (node->child1()->shouldSpeculateStringOrStringObject()
&& attemptToMakeFastStringAdd<StringOrStringObjectUse>(node, node->child1(), node->child2()))
break;
if (node->child2()->shouldSpeculateStringOrStringObject()
&& attemptToMakeFastStringAdd<StringOrStringObjectUse>(node, node->child2(), node->child1()))
break;
break;
}
case MakeRope: {
fixupMakeRope(node);
break;
}
case ArithAdd:
case ArithSub: {
if (attemptToMakeIntegerAdd(node))
break;
fixEdge<NumberUse>(node->child1());
fixEdge<NumberUse>(node->child2());
break;
}
case ArithNegate: {
if (m_graph.negateShouldSpeculateInt32(node)) {
fixEdge<Int32Use>(node->child1());
break;
}
if (m_graph.negateShouldSpeculateMachineInt(node)) {
fixEdge<MachineIntUse>(node->child1());
break;
}
fixEdge<NumberUse>(node->child1());
break;
}
case ArithMul: {
if (m_graph.mulShouldSpeculateInt32(node)) {
fixEdge<Int32Use>(node->child1());
fixEdge<Int32Use>(node->child2());
break;
}
if (m_graph.mulShouldSpeculateMachineInt(node)) {
fixEdge<MachineIntUse>(node->child1());
fixEdge<MachineIntUse>(node->child2());
break;
}
fixEdge<NumberUse>(node->child1());
fixEdge<NumberUse>(node->child2());
break;
}
case ArithDiv:
case ArithMod: {
if (Node::shouldSpeculateInt32ForArithmetic(node->child1().node(), node->child2().node())
&& node->canSpeculateInt32()) {
if (optimizeForX86() || optimizeForARM64() || optimizeForARMv7s()) {
fixEdge<Int32Use>(node->child1());
fixEdge<Int32Use>(node->child2());
break;
}
Edge child1 = node->child1();
Edge child2 = node->child2();
injectInt32ToDoubleNode(node->child1());
injectInt32ToDoubleNode(node->child2());
// We don't need to do ref'ing on the children because we're stealing them from
// the original division.
Node* newDivision = m_insertionSet.insertNode(
m_indexInBlock, SpecDouble, *node);
node->setOp(DoubleAsInt32);
node->children.initialize(Edge(newDivision, KnownNumberUse), Edge(), Edge());
m_insertionSet.insertNode(m_indexInBlock + 1, SpecNone, Phantom, node->codeOrigin, child1, child2);
break;
}
fixEdge<NumberUse>(node->child1());
fixEdge<NumberUse>(node->child2());
break;
}
case ArithMin:
case ArithMax: {
if (Node::shouldSpeculateInt32ForArithmetic(node->child1().node(), node->child2().node())
&& node->canSpeculateInt32()) {
fixEdge<Int32Use>(node->child1());
fixEdge<Int32Use>(node->child2());
break;
}
fixEdge<NumberUse>(node->child1());
fixEdge<NumberUse>(node->child2());
break;
}
case ArithAbs: {
if (node->child1()->shouldSpeculateInt32ForArithmetic()
&& node->canSpeculateInt32()) {
fixEdge<Int32Use>(node->child1());
break;
}
fixEdge<NumberUse>(node->child1());
break;
}
case ArithSqrt:
case ArithSin:
case ArithCos: {
fixEdge<NumberUse>(node->child1());
break;
}
case LogicalNot: {
if (node->child1()->shouldSpeculateBoolean())
fixEdge<BooleanUse>(node->child1());
else if (node->child1()->shouldSpeculateObjectOrOther())
fixEdge<ObjectOrOtherUse>(node->child1());
else if (node->child1()->shouldSpeculateInt32())
fixEdge<Int32Use>(node->child1());
else if (node->child1()->shouldSpeculateNumber())
fixEdge<NumberUse>(node->child1());
else if (node->child1()->shouldSpeculateString())
fixEdge<StringUse>(node->child1());
break;
}
case TypeOf: {
if (node->child1()->shouldSpeculateString())
fixEdge<StringUse>(node->child1());
else if (node->child1()->shouldSpeculateCell())
fixEdge<CellUse>(node->child1());
break;
}
case CompareEqConstant: {
break;
}
case CompareEq:
case CompareLess:
case CompareLessEq:
case CompareGreater:
case CompareGreaterEq: {
if (Node::shouldSpeculateInt32(node->child1().node(), node->child2().node())) {
fixEdge<Int32Use>(node->child1());
fixEdge<Int32Use>(node->child2());
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
if (enableInt52()
&& Node::shouldSpeculateMachineInt(node->child1().node(), node->child2().node())) {
fixEdge<MachineIntUse>(node->child1());
fixEdge<MachineIntUse>(node->child2());
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
if (Node::shouldSpeculateNumber(node->child1().node(), node->child2().node())) {
fixEdge<NumberUse>(node->child1());
fixEdge<NumberUse>(node->child2());
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
if (node->op() != CompareEq)
break;
if (Node::shouldSpeculateBoolean(node->child1().node(), node->child2().node())) {
fixEdge<BooleanUse>(node->child1());
fixEdge<BooleanUse>(node->child2());
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
if (node->child1()->shouldSpeculateStringIdent() && node->child2()->shouldSpeculateStringIdent()) {
fixEdge<StringIdentUse>(node->child1());
fixEdge<StringIdentUse>(node->child2());
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
if (node->child1()->shouldSpeculateString() && node->child2()->shouldSpeculateString() && GPRInfo::numberOfRegisters >= 7) {
fixEdge<StringUse>(node->child1());
fixEdge<StringUse>(node->child2());
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
if (node->child1()->shouldSpeculateObject() && node->child2()->shouldSpeculateObject()) {
fixEdge<ObjectUse>(node->child1());
fixEdge<ObjectUse>(node->child2());
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
if (node->child1()->shouldSpeculateObject() && node->child2()->shouldSpeculateObjectOrOther()) {
fixEdge<ObjectUse>(node->child1());
fixEdge<ObjectOrOtherUse>(node->child2());
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
if (node->child1()->shouldSpeculateObjectOrOther() && node->child2()->shouldSpeculateObject()) {
fixEdge<ObjectOrOtherUse>(node->child1());
fixEdge<ObjectUse>(node->child2());
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
break;
}
case CompareStrictEqConstant: {
break;
}
case CompareStrictEq: {
if (Node::shouldSpeculateBoolean(node->child1().node(), node->child2().node())) {
fixEdge<BooleanUse>(node->child1());
fixEdge<BooleanUse>(node->child2());
break;
}
if (Node::shouldSpeculateInt32(node->child1().node(), node->child2().node())) {
fixEdge<Int32Use>(node->child1());
fixEdge<Int32Use>(node->child2());
break;
}
if (enableInt52()
&& Node::shouldSpeculateMachineInt(node->child1().node(), node->child2().node())) {
fixEdge<MachineIntUse>(node->child1());
fixEdge<MachineIntUse>(node->child2());
break;
}
if (Node::shouldSpeculateNumber(node->child1().node(), node->child2().node())) {
fixEdge<NumberUse>(node->child1());
fixEdge<NumberUse>(node->child2());
break;
}
if (node->child1()->shouldSpeculateStringIdent() && node->child2()->shouldSpeculateStringIdent()) {
fixEdge<StringIdentUse>(node->child1());
fixEdge<StringIdentUse>(node->child2());
break;
}
if (node->child1()->shouldSpeculateString() && node->child2()->shouldSpeculateString() && GPRInfo::numberOfRegisters >= 7) {
fixEdge<StringUse>(node->child1());
fixEdge<StringUse>(node->child2());
break;
}
if (node->child1()->shouldSpeculateObject() && node->child2()->shouldSpeculateObject()) {
fixEdge<ObjectUse>(node->child1());
fixEdge<ObjectUse>(node->child2());
break;
}
break;
}
case StringFromCharCode:
fixEdge<Int32Use>(node->child1());
break;
case StringCharAt:
case StringCharCodeAt: {
// Currently we have no good way of refining these.
ASSERT(node->arrayMode() == ArrayMode(Array::String));
blessArrayOperation(node->child1(), node->child2(), node->child3());
fixEdge<KnownCellUse>(node->child1());
fixEdge<Int32Use>(node->child2());
break;
}
case GetByVal: {
node->setArrayMode(
node->arrayMode().refine(
node->child1()->prediction(),
node->child2()->prediction(),
SpecNone, node->flags()));
blessArrayOperation(node->child1(), node->child2(), node->child3());
ArrayMode arrayMode = node->arrayMode();
switch (arrayMode.type()) {
case Array::Double:
if (arrayMode.arrayClass() == Array::OriginalArray
&& arrayMode.speculation() == Array::InBounds
&& m_graph.globalObjectFor(node->codeOrigin)->arrayPrototypeChainIsSane()
&& !(node->flags() & NodeBytecodeUsesAsOther))
node->setArrayMode(arrayMode.withSpeculation(Array::SaneChain));
break;
case Array::String:
if ((node->prediction() & ~SpecString)
|| m_graph.hasExitSite(node->codeOrigin, OutOfBounds))
node->setArrayMode(arrayMode.withSpeculation(Array::OutOfBounds));
break;
default:
break;
}
switch (node->arrayMode().type()) {
case Array::SelectUsingPredictions:
case Array::Unprofiled:
case Array::Undecided:
RELEASE_ASSERT_NOT_REACHED();
break;
case Array::Generic:
#if USE(JSVALUE32_64)
fixEdge<CellUse>(node->child1()); // Speculating cell due to register pressure on 32-bit.
#endif
break;
case Array::ForceExit:
break;
default:
fixEdge<KnownCellUse>(node->child1());
fixEdge<Int32Use>(node->child2());
break;
}
break;
}
case PutByValDirect:
case PutByVal:
case PutByValAlias: {
Edge& child1 = m_graph.varArgChild(node, 0);
Edge& child2 = m_graph.varArgChild(node, 1);
Edge& child3 = m_graph.varArgChild(node, 2);
node->setArrayMode(
node->arrayMode().refine(
child1->prediction(),
child2->prediction(),
child3->prediction()));
blessArrayOperation(child1, child2, m_graph.varArgChild(node, 3));
switch (node->arrayMode().modeForPut().type()) {
case Array::SelectUsingPredictions:
case Array::Unprofiled:
case Array::Undecided:
RELEASE_ASSERT_NOT_REACHED();
break;
case Array::ForceExit:
case Array::Generic:
#if USE(JSVALUE32_64)
// Due to register pressure on 32-bit, we speculate cell and
// ignore the base-is-not-cell case entirely by letting the
// baseline JIT handle it.
fixEdge<CellUse>(child1);
#endif
break;
case Array::Int32:
fixEdge<KnownCellUse>(child1);
fixEdge<Int32Use>(child2);
fixEdge<Int32Use>(child3);
if (child3->prediction() & SpecInt52)
fixEdge<MachineIntUse>(child3);
else
fixEdge<Int32Use>(child3);
break;
case Array::Double:
fixEdge<KnownCellUse>(child1);
fixEdge<Int32Use>(child2);
fixEdge<RealNumberUse>(child3);
break;
case Array::Int8Array:
case Array::Int16Array:
case Array::Int32Array:
case Array::Uint8Array:
case Array::Uint8ClampedArray:
case Array::Uint16Array:
case Array::Uint32Array:
fixEdge<KnownCellUse>(child1);
fixEdge<Int32Use>(child2);
if (child3->shouldSpeculateInt32())
fixEdge<Int32Use>(child3);
else if (child3->shouldSpeculateMachineInt())
fixEdge<MachineIntUse>(child3);
else
fixEdge<NumberUse>(child3);
break;
case Array::Float32Array:
case Array::Float64Array:
fixEdge<KnownCellUse>(child1);
fixEdge<Int32Use>(child2);
fixEdge<NumberUse>(child3);
break;
case Array::Contiguous:
case Array::ArrayStorage:
case Array::SlowPutArrayStorage:
case Array::Arguments:
fixEdge<KnownCellUse>(child1);
fixEdge<Int32Use>(child2);
insertStoreBarrier(m_indexInBlock, child1, child3);
break;
default:
fixEdge<KnownCellUse>(child1);
fixEdge<Int32Use>(child2);
break;
}
break;
}
case ArrayPush: {
// May need to refine the array mode in case the value prediction contravenes
// the array prediction. For example, we may have evidence showing that the
// array is in Int32 mode, but the value we're storing is likely to be a double.
// Then we should turn this into a conversion to Double array followed by the
// push. On the other hand, we absolutely don't want to refine based on the
// base prediction. If it has non-cell garbage in it, then we want that to be
// ignored. That's because ArrayPush can't handle any array modes that aren't
// array-related - so if refine() turned this into a "Generic" ArrayPush then
// that would break things.
node->setArrayMode(
node->arrayMode().refine(
node->child1()->prediction() & SpecCell,
SpecInt32,
node->child2()->prediction()));
blessArrayOperation(node->child1(), Edge(), node->child3());
fixEdge<KnownCellUse>(node->child1());
switch (node->arrayMode().type()) {
case Array::Int32:
fixEdge<Int32Use>(node->child2());
break;
case Array::Double:
fixEdge<RealNumberUse>(node->child2());
break;
case Array::Contiguous:
case Array::ArrayStorage:
insertStoreBarrier(m_indexInBlock, node->child1(), node->child2());
break;
default:
break;
}
break;
}
case ArrayPop: {
blessArrayOperation(node->child1(), Edge(), node->child2());
fixEdge<KnownCellUse>(node->child1());
break;
}
case RegExpExec:
case RegExpTest: {
fixEdge<CellUse>(node->child1());
fixEdge<CellUse>(node->child2());
break;
}
case Branch: {
if (node->child1()->shouldSpeculateBoolean())
fixEdge<BooleanUse>(node->child1());
else if (node->child1()->shouldSpeculateObjectOrOther())
fixEdge<ObjectOrOtherUse>(node->child1());
else if (node->child1()->shouldSpeculateInt32())
fixEdge<Int32Use>(node->child1());
else if (node->child1()->shouldSpeculateNumber())
fixEdge<NumberUse>(node->child1());
Node* logicalNot = node->child1().node();
if (logicalNot->op() == LogicalNot) {
// Make sure that OSR exit can't observe the LogicalNot. If it can,
// then we must compute it and cannot peephole around it.
bool found = false;
bool ok = true;
for (unsigned i = m_indexInBlock; i--;) {
Node* candidate = m_block->at(i);
if (candidate == logicalNot) {
found = true;
break;
}
if (candidate->canExit()) {
ok = false;
found = true;
break;
}
}
ASSERT_UNUSED(found, found);
if (ok) {
Edge newChildEdge = logicalNot->child1();
if (newChildEdge->hasBooleanResult()) {
node->children.setChild1(newChildEdge);
BasicBlock* toBeTaken = node->notTakenBlock();
BasicBlock* toBeNotTaken = node->takenBlock();
node->setTakenBlock(toBeTaken);
node->setNotTakenBlock(toBeNotTaken);
}
}
}
break;
}
case Switch: {
SwitchData* data = node->switchData();
switch (data->kind) {
case SwitchImm:
if (node->child1()->shouldSpeculateInt32())
fixEdge<Int32Use>(node->child1());
break;
case SwitchChar:
if (node->child1()->shouldSpeculateString())
fixEdge<StringUse>(node->child1());
break;
case SwitchString:
if (node->child1()->shouldSpeculateStringIdent())
fixEdge<StringIdentUse>(node->child1());
else if (node->child1()->shouldSpeculateString())
fixEdge<StringUse>(node->child1());
break;
}
break;
}
case ToPrimitive: {
fixupToPrimitive(node);
break;
}
case ToString: {
fixupToString(node);
break;
}
case NewStringObject: {
fixEdge<KnownStringUse>(node->child1());
break;
}
case NewArray: {
for (unsigned i = m_graph.varArgNumChildren(node); i--;) {
node->setIndexingType(
leastUpperBoundOfIndexingTypeAndType(
node->indexingType(), m_graph.varArgChild(node, i)->prediction()));
}
switch (node->indexingType()) {
case ALL_BLANK_INDEXING_TYPES:
CRASH();
break;
case ALL_UNDECIDED_INDEXING_TYPES:
if (node->numChildren()) {
// This will only happen if the children have no type predictions. We
// would have already exited by now, but insert a forced exit just to
// be safe.
m_insertionSet.insertNode(
m_indexInBlock, SpecNone, ForceOSRExit, node->codeOrigin);
}
break;
case ALL_INT32_INDEXING_TYPES:
for (unsigned operandIndex = 0; operandIndex < node->numChildren(); ++operandIndex)
fixEdge<Int32Use>(m_graph.m_varArgChildren[node->firstChild() + operandIndex]);
break;
case ALL_DOUBLE_INDEXING_TYPES:
for (unsigned operandIndex = 0; operandIndex < node->numChildren(); ++operandIndex)
fixEdge<RealNumberUse>(m_graph.m_varArgChildren[node->firstChild() + operandIndex]);
break;
case ALL_CONTIGUOUS_INDEXING_TYPES:
case ALL_ARRAY_STORAGE_INDEXING_TYPES:
break;
default:
CRASH();
break;
}
break;
}
case NewTypedArray: {
if (node->child1()->shouldSpeculateInt32()) {
fixEdge<Int32Use>(node->child1());
node->clearFlags(NodeMustGenerate | NodeClobbersWorld);
break;
}
break;
}
case NewArrayWithSize: {
fixEdge<Int32Use>(node->child1());
break;
}
case ToThis: {
ECMAMode ecmaMode = m_graph.executableFor(node->codeOrigin)->isStrictMode() ? StrictMode : NotStrictMode;
if (isOtherSpeculation(node->child1()->prediction())) {
if (ecmaMode == StrictMode) {
fixEdge<OtherUse>(node->child1());
node->convertToIdentity();
break;
}
m_insertionSet.insertNode(
m_indexInBlock, SpecNone, Phantom, node->codeOrigin,
Edge(node->child1().node(), OtherUse));
observeUseKindOnNode<OtherUse>(node->child1().node());
node->convertToWeakConstant(m_graph.globalThisObjectFor(node->codeOrigin));
break;
}
if (isFinalObjectSpeculation(node->child1()->prediction())) {
fixEdge<FinalObjectUse>(node->child1());
node->convertToIdentity();
break;
}
break;
}
case GetMyArgumentByVal:
case GetMyArgumentByValSafe: {
fixEdge<Int32Use>(node->child1());
break;
}
case PutStructure: {
fixEdge<KnownCellUse>(node->child1());
insertStoreBarrier(m_indexInBlock, node->child1());
break;
}
case PutClosureVar: {
fixEdge<KnownCellUse>(node->child1());
insertStoreBarrier(m_indexInBlock, node->child1(), node->child3());
break;
}
case GetClosureRegisters:
case SkipTopScope:
case SkipScope:
case GetScope: {
fixEdge<KnownCellUse>(node->child1());
break;
}
case AllocatePropertyStorage:
case ReallocatePropertyStorage: {
fixEdge<KnownCellUse>(node->child1());
insertStoreBarrier(m_indexInBlock + 1, node->child1());
break;
}
case GetById:
case GetByIdFlush: {
if (!node->child1()->shouldSpeculateCell())
break;
StringImpl* impl = m_graph.identifiers()[node->identifierNumber()];
if (impl == vm().propertyNames->length.impl()) {
attemptToMakeGetArrayLength(node);
break;
}
if (impl == vm().propertyNames->byteLength.impl()) {
attemptToMakeGetTypedArrayByteLength(node);
break;
}
if (impl == vm().propertyNames->byteOffset.impl()) {
attemptToMakeGetTypedArrayByteOffset(node);
break;
}
fixEdge<CellUse>(node->child1());
break;
}
case PutById:
case PutByIdDirect: {
fixEdge<CellUse>(node->child1());
insertStoreBarrier(m_indexInBlock, node->child1(), node->child2());
break;
}
case CheckExecutable:
case CheckStructure:
case StructureTransitionWatchpoint:
case CheckFunction:
case CheckHasInstance:
case CreateThis:
case GetButterfly: {
fixEdge<CellUse>(node->child1());
break;
}
case Arrayify:
case ArrayifyToStructure: {
fixEdge<CellUse>(node->child1());
if (node->child2())
fixEdge<Int32Use>(node->child2());
break;
}
case GetByOffset: {
if (!node->child1()->hasStorageResult())
fixEdge<KnownCellUse>(node->child1());
fixEdge<KnownCellUse>(node->child2());
break;
}
case PutByOffset: {
if (!node->child1()->hasStorageResult())
fixEdge<KnownCellUse>(node->child1());
fixEdge<KnownCellUse>(node->child2());
insertStoreBarrier(m_indexInBlock, node->child2(), node->child3());
break;
}
case InstanceOf: {
// FIXME: This appears broken: CheckHasInstance already does an unconditional cell
// check. https://bugs.webkit.org/show_bug.cgi?id=107479
if (!(node->child1()->prediction() & ~SpecCell))
fixEdge<CellUse>(node->child1());
fixEdge<CellUse>(node->child2());
break;
}
case In: {
// FIXME: We should at some point have array profiling on op_in, in which
// case we would be able to turn this into a kind of GetByVal.
fixEdge<CellUse>(node->child2());
break;
}
case Phantom:
case Identity:
case Check: {
switch (node->child1().useKind()) {
case NumberUse:
if (node->child1()->shouldSpeculateInt32ForArithmetic())
node->child1().setUseKind(Int32Use);
break;
default:
break;
}
observeUseKindOnEdge(node->child1());
break;
}
case GetArrayLength:
case Phi:
case Upsilon:
case GetArgument:
case PhantomPutStructure:
case GetIndexedPropertyStorage:
case GetTypedArrayByteOffset:
case LastNodeType:
case CheckTierUpInLoop:
case CheckTierUpAtReturn:
case CheckTierUpAndOSREnter:
case Int52ToDouble:
case Int52ToValue:
case InvalidationPoint:
case CheckArray:
case CheckInBounds:
case ConstantStoragePointer:
// These are just nodes that we don't currently expect to see during fixup.
// If we ever wanted to insert them prior to fixup, then we just have to create
// fixup rules for them.
RELEASE_ASSERT_NOT_REACHED();
break;
case PutGlobalVar: {
Node* globalObjectNode = m_insertionSet.insertNode(m_indexInBlock, SpecNone, WeakJSConstant, node->codeOrigin,
OpInfo(m_graph.globalObjectFor(node->codeOrigin)));
Node* barrierNode = m_graph.addNode(SpecNone, ConditionalStoreBarrier, m_currentNode->codeOrigin,
Edge(globalObjectNode, KnownCellUse), Edge(node->child1().node(), UntypedUse));
fixupNode(barrierNode);
m_insertionSet.insert(m_indexInBlock, barrierNode);
break;
}
case TearOffActivation: {
Node* barrierNode = m_graph.addNode(SpecNone, StoreBarrierWithNullCheck, m_currentNode->codeOrigin,
Edge(node->child1().node(), UntypedUse));
fixupNode(barrierNode);
m_insertionSet.insert(m_indexInBlock, barrierNode);
break;
}
case IsString:
if (node->child1()->shouldSpeculateString()) {
m_insertionSet.insertNode(m_indexInBlock, SpecNone, Phantom, node->codeOrigin,
Edge(node->child1().node(), StringUse));
m_graph.convertToConstant(node, jsBoolean(true));
observeUseKindOnNode<StringUse>(node);
}
break;
#if !ASSERT_DISABLED
// Have these no-op cases here to ensure that nobody forgets to add handlers for new opcodes.
case SetArgument:
case JSConstant:
case WeakJSConstant:
case GetLocal:
case GetCallee:
case Flush:
case PhantomLocal:
case GetLocalUnlinked:
case GetMyScope:
case GetClosureVar:
case GetGlobalVar:
case NotifyWrite:
case VariableWatchpoint:
case VarInjectionWatchpoint:
case AllocationProfileWatchpoint:
case Call:
case Construct:
case NewObject:
case NewArrayBuffer:
case NewRegexp:
case Breakpoint:
case IsUndefined:
case IsBoolean:
case IsNumber:
case IsObject:
case IsFunction:
case CreateActivation:
case CreateArguments:
case PhantomArguments:
case TearOffArguments:
case GetMyArgumentsLength:
case GetMyArgumentsLengthSafe: