Rationalize DFG DCE
https://bugs.webkit.org/show_bug.cgi?id=125523
Reviewed by Mark Hahnenberg.
Adds the ability to DCE more things. It's now the case that if a node is completely
pure, we clear NodeMustGenerate and the node becomes a DCE candidate.
* dfg/DFGAbstractInterpreterInlines.h:
(JSC::DFG::AbstractInterpreter<AbstractStateType>::executeEffects):
* dfg/DFGCSEPhase.cpp:
(JSC::DFG::CSEPhase::performNodeCSE):
* dfg/DFGClobberize.h:
(JSC::DFG::clobberize):
* dfg/DFGDCEPhase.cpp:
(JSC::DFG::DCEPhase::cleanVariables):
* dfg/DFGFixupPhase.cpp:
(JSC::DFG::FixupPhase::fixupNode):
* dfg/DFGGraph.h:
(JSC::DFG::Graph::clobbersWorld):
* dfg/DFGNodeType.h:
* dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::compileAdd):
* dfg/DFGSpeculativeJIT.h:
* dfg/DFGSpeculativeJIT32_64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* dfg/DFGSpeculativeJIT64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* ftl/FTLLowerDFGToLLVM.cpp:
(JSC::FTL::LowerDFGToLLVM::compileNode):
(JSC::FTL::LowerDFGToLLVM::compileValueAdd):
git-svn-id: http://svn.webkit.org/repository/webkit/trunk@161218 268f45cc-cd09-0410-ab3c-d52691b4dbfc
diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
index 7f85aee..6195fb7 100644
--- a/Source/JavaScriptCore/ChangeLog
+++ b/Source/JavaScriptCore/ChangeLog
@@ -1,3 +1,37 @@
+2014-01-01 Filip Pizlo <fpizlo@apple.com>
+
+ Rationalize DFG DCE
+ https://bugs.webkit.org/show_bug.cgi?id=125523
+
+ Reviewed by Mark Hahnenberg.
+
+ Adds the ability to DCE more things. It's now the case that if a node is completely
+ pure, we clear NodeMustGenerate and the node becomes a DCE candidate.
+
+ * dfg/DFGAbstractInterpreterInlines.h:
+ (JSC::DFG::AbstractInterpreter<AbstractStateType>::executeEffects):
+ * dfg/DFGCSEPhase.cpp:
+ (JSC::DFG::CSEPhase::performNodeCSE):
+ * dfg/DFGClobberize.h:
+ (JSC::DFG::clobberize):
+ * dfg/DFGDCEPhase.cpp:
+ (JSC::DFG::DCEPhase::cleanVariables):
+ * dfg/DFGFixupPhase.cpp:
+ (JSC::DFG::FixupPhase::fixupNode):
+ * dfg/DFGGraph.h:
+ (JSC::DFG::Graph::clobbersWorld):
+ * dfg/DFGNodeType.h:
+ * dfg/DFGSpeculativeJIT.cpp:
+ (JSC::DFG::SpeculativeJIT::compileAdd):
+ * dfg/DFGSpeculativeJIT.h:
+ * dfg/DFGSpeculativeJIT32_64.cpp:
+ (JSC::DFG::SpeculativeJIT::compile):
+ * dfg/DFGSpeculativeJIT64.cpp:
+ (JSC::DFG::SpeculativeJIT::compile):
+ * ftl/FTLLowerDFGToLLVM.cpp:
+ (JSC::FTL::LowerDFGToLLVM::compileNode):
+ (JSC::FTL::LowerDFGToLLVM::compileValueAdd):
+
2014-01-02 Benjamin Poulain <benjamin@webkit.org>
Attempt to fix the build of WebCore's code generator on CMake based system
diff --git a/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h b/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h
index 465d1db..6373f4e 100644
--- a/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h
+++ b/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h
@@ -340,7 +340,19 @@
break;
}
- case ValueAdd:
+ case ValueAdd: {
+ JSValue left = forNode(node->child1()).value();
+ JSValue right = forNode(node->child2()).value();
+ if (left && right && left.isNumber() && right.isNumber()) {
+ setConstant(node, JSValue(left.asNumber() + right.asNumber()));
+ break;
+ }
+ ASSERT(node->binaryUseKind() == UntypedUse);
+ clobberWorld(node->codeOrigin, clobberLimit);
+ forNode(node).setType(SpecString | SpecBytecodeNumber);
+ break;
+ }
+
case ArithAdd: {
JSValue left = forNode(node->child1()).value();
JSValue right = forNode(node->child2()).value();
@@ -368,9 +380,7 @@
forNode(node).setType(SpecDouble);
break;
default:
- RELEASE_ASSERT(node->op() == ValueAdd);
- clobberWorld(node->codeOrigin, clobberLimit);
- forNode(node).setType(SpecString | SpecBytecodeNumber);
+ RELEASE_ASSERT_NOT_REACHED();
break;
}
break;
diff --git a/Source/JavaScriptCore/dfg/DFGCSEPhase.cpp b/Source/JavaScriptCore/dfg/DFGCSEPhase.cpp
index c27e110..7cc49ab 100644
--- a/Source/JavaScriptCore/dfg/DFGCSEPhase.cpp
+++ b/Source/JavaScriptCore/dfg/DFGCSEPhase.cpp
@@ -1239,7 +1239,6 @@
// Handle nodes that are conditionally pure: these are pure, and can
// be CSE'd, so long as the prediction is the one we want.
- case ValueAdd:
case CompareLess:
case CompareLessEq:
case CompareGreater:
diff --git a/Source/JavaScriptCore/dfg/DFGClobberize.h b/Source/JavaScriptCore/dfg/DFGClobberize.h
index df97f4f..972bfa4 100644
--- a/Source/JavaScriptCore/dfg/DFGClobberize.h
+++ b/Source/JavaScriptCore/dfg/DFGClobberize.h
@@ -204,25 +204,11 @@
case In:
case GetMyArgumentsLengthSafe:
case GetMyArgumentByValSafe:
+ case ValueAdd:
read(World);
write(World);
return;
- case ValueAdd:
- switch (node->binaryUseKind()) {
- case Int32Use:
- case NumberUse:
- case MachineIntUse:
- return;
- case UntypedUse:
- read(World);
- write(World);
- return;
- default:
- RELEASE_ASSERT_NOT_REACHED();
- return;
- }
-
case GetCallee:
read(AbstractHeap(Variables, JSStack::Callee));
return;
@@ -579,30 +565,17 @@
}
return;
+ case CompareEq:
case CompareLess:
case CompareLessEq:
case CompareGreater:
case CompareGreaterEq:
- if (graph.isPredictedNumerical(node))
+ if (!node->isBinaryUseKind(UntypedUse))
return;
read(World);
write(World);
return;
- case CompareEq:
- if (graph.isPredictedNumerical(node)
- || node->isBinaryUseKind(StringUse)
- || node->isBinaryUseKind(StringIdentUse))
- return;
-
- if ((node->child1().useKind() == ObjectUse || node->child1().useKind() == ObjectOrOtherUse)
- && (node->child2().useKind() == ObjectUse || node->child2().useKind() == ObjectOrOtherUse))
- return;
-
- read(World);
- write(World);
- return;
-
case ToString:
switch (node->child1().useKind()) {
case StringObjectUse:
diff --git a/Source/JavaScriptCore/dfg/DFGDCEPhase.cpp b/Source/JavaScriptCore/dfg/DFGDCEPhase.cpp
index b590f08..36f7683 100644
--- a/Source/JavaScriptCore/dfg/DFGDCEPhase.cpp
+++ b/Source/JavaScriptCore/dfg/DFGDCEPhase.cpp
@@ -259,7 +259,7 @@
continue;
if (node->op() == GetLocal) {
node = node->child1().node();
- ASSERT(node->op() == Phi);
+ ASSERT(node->op() == Phi || node->op() == SetArgument);
if (node->shouldGenerate()) {
variables[i] = node;
continue;
diff --git a/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp b/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp
index 03778c3..25eb9b5 100644
--- a/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp
+++ b/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp
@@ -154,11 +154,16 @@
}
case ValueAdd: {
- if (attemptToMakeIntegerAdd(node))
+ 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;
}
@@ -326,17 +331,20 @@
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)
@@ -344,31 +352,37 @@
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;
diff --git a/Source/JavaScriptCore/dfg/DFGGraph.h b/Source/JavaScriptCore/dfg/DFGGraph.h
index f0964a5..7a51700 100644
--- a/Source/JavaScriptCore/dfg/DFGGraph.h
+++ b/Source/JavaScriptCore/dfg/DFGGraph.h
@@ -648,13 +648,6 @@
if (!(node->flags() & NodeMightClobber))
return false;
switch (node->op()) {
- case ValueAdd:
- case CompareLess:
- case CompareLessEq:
- case CompareGreater:
- case CompareGreaterEq:
- case CompareEq:
- return !isPredictedNumerical(node);
case GetByVal:
case PutByValDirect:
case PutByVal:
diff --git a/Source/JavaScriptCore/dfg/DFGNodeType.h b/Source/JavaScriptCore/dfg/DFGNodeType.h
index 30687a1..c81f2c4 100644
--- a/Source/JavaScriptCore/dfg/DFGNodeType.h
+++ b/Source/JavaScriptCore/dfg/DFGNodeType.h
@@ -96,12 +96,12 @@
macro(InvalidationPoint, NodeMustGenerate) \
\
/* Nodes for bitwise operations. */\
- macro(BitAnd, NodeResultInt32 | NodeMustGenerate) \
- macro(BitOr, NodeResultInt32 | NodeMustGenerate) \
- macro(BitXor, NodeResultInt32 | NodeMustGenerate) \
- macro(BitLShift, NodeResultInt32 | NodeMustGenerate) \
- macro(BitRShift, NodeResultInt32 | NodeMustGenerate) \
- macro(BitURShift, NodeResultInt32 | NodeMustGenerate) \
+ macro(BitAnd, NodeResultInt32) \
+ macro(BitOr, NodeResultInt32) \
+ macro(BitXor, NodeResultInt32) \
+ macro(BitLShift, NodeResultInt32) \
+ macro(BitRShift, NodeResultInt32) \
+ macro(BitURShift, NodeResultInt32) \
/* Bitwise operators call ToInt32 on their operands. */\
macro(ValueToInt32, NodeResultInt32) \
/* Used to box the result of URShift nodes (result has range 0..2^32-1). */\
@@ -118,22 +118,22 @@
macro(Int52ToDouble, NodeResultNumber) \
\
/* Nodes for arithmetic operations. */\
- macro(ArithAdd, NodeResultNumber | NodeMustGenerate) \
- macro(ArithSub, NodeResultNumber | NodeMustGenerate) \
- macro(ArithNegate, NodeResultNumber | NodeMustGenerate) \
- macro(ArithMul, NodeResultNumber | NodeMustGenerate) \
- macro(ArithIMul, NodeResultInt32 | NodeMustGenerate) \
- macro(ArithDiv, NodeResultNumber | NodeMustGenerate) \
- macro(ArithMod, NodeResultNumber | NodeMustGenerate) \
- macro(ArithAbs, NodeResultNumber | NodeMustGenerate) \
- macro(ArithMin, NodeResultNumber | NodeMustGenerate) \
- macro(ArithMax, NodeResultNumber | NodeMustGenerate) \
- macro(ArithSqrt, NodeResultNumber | NodeMustGenerate) \
- macro(ArithSin, NodeResultNumber | NodeMustGenerate) \
- macro(ArithCos, NodeResultNumber | NodeMustGenerate) \
+ macro(ArithAdd, NodeResultNumber) \
+ macro(ArithSub, NodeResultNumber) \
+ macro(ArithNegate, NodeResultNumber) \
+ macro(ArithMul, NodeResultNumber) \
+ macro(ArithIMul, NodeResultInt32) \
+ macro(ArithDiv, NodeResultNumber) \
+ macro(ArithMod, NodeResultNumber) \
+ macro(ArithAbs, NodeResultNumber) \
+ macro(ArithMin, NodeResultNumber) \
+ macro(ArithMax, NodeResultNumber) \
+ macro(ArithSqrt, NodeResultNumber) \
+ macro(ArithSin, NodeResultNumber) \
+ macro(ArithCos, NodeResultNumber) \
\
/* Add of values may either be arithmetic, or result in string concatenation. */\
- macro(ValueAdd, NodeResultJS | NodeMustGenerate | NodeMightClobber) \
+ macro(ValueAdd, NodeResultJS | NodeMustGenerate | NodeClobbersWorld) \
\
/* Property access. */\
/* PutByValAlias indicates a 'put' aliases a prior write to the same property. */\
@@ -208,12 +208,12 @@
macro(StringFromCharCode, NodeResultJS) \
\
/* Nodes for comparison operations. */\
- macro(CompareLess, NodeResultBoolean | NodeMustGenerate | NodeMightClobber) \
- macro(CompareLessEq, NodeResultBoolean | NodeMustGenerate | NodeMightClobber) \
- macro(CompareGreater, NodeResultBoolean | NodeMustGenerate | NodeMightClobber) \
- macro(CompareGreaterEq, NodeResultBoolean | NodeMustGenerate | NodeMightClobber) \
- macro(CompareEq, NodeResultBoolean | NodeMustGenerate | NodeMightClobber) \
- macro(CompareEqConstant, NodeResultBoolean | NodeMustGenerate) \
+ macro(CompareLess, NodeResultBoolean | NodeMustGenerate | NodeClobbersWorld) \
+ macro(CompareLessEq, NodeResultBoolean | NodeMustGenerate | NodeClobbersWorld) \
+ macro(CompareGreater, NodeResultBoolean | NodeMustGenerate | NodeClobbersWorld) \
+ macro(CompareGreaterEq, NodeResultBoolean | NodeMustGenerate | NodeClobbersWorld) \
+ macro(CompareEq, NodeResultBoolean | NodeMustGenerate | NodeClobbersWorld) \
+ macro(CompareEqConstant, NodeResultBoolean) \
macro(CompareStrictEq, NodeResultBoolean) \
macro(CompareStrictEqConstant, NodeResultBoolean) \
\
diff --git a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp
index 74cad85..7204f09 100644
--- a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp
+++ b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp
@@ -2685,12 +2685,6 @@
return;
}
- case UntypedUse: {
- RELEASE_ASSERT(node->op() == ValueAdd);
- compileValueAdd(node);
- return;
- }
-
default:
RELEASE_ASSERT_NOT_REACHED();
break;
diff --git a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.h b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.h
index 13612cb..570f46f 100644
--- a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.h
+++ b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT.h
@@ -1966,7 +1966,6 @@
void compilePeepHoleObjectToObjectOrOtherEquality(Edge leftChild, Edge rightChild, Node* branchNode);
void compileObjectEquality(Node*);
void compileObjectToObjectOrOtherEquality(Edge leftChild, Edge rightChild);
- void compileValueAdd(Node*);
void compileObjectOrOtherLogicalNot(Edge value);
void compileLogicalNot(Node*);
void compileStringEquality(Node*);
diff --git a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp
index 31a1550..6c5588e 100644
--- a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp
+++ b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp
@@ -1418,28 +1418,6 @@
booleanResult(resultPayload.gpr(), node);
}
-void SpeculativeJIT::compileValueAdd(Node* node)
-{
- JSValueOperand op1(this, node->child1());
- JSValueOperand op2(this, node->child2());
-
- GPRReg op1TagGPR = op1.tagGPR();
- GPRReg op1PayloadGPR = op1.payloadGPR();
- GPRReg op2TagGPR = op2.tagGPR();
- GPRReg op2PayloadGPR = op2.payloadGPR();
-
- flushRegisters();
-
- GPRResult2 resultTag(this);
- GPRResult resultPayload(this);
- if (isKnownNotNumber(node->child1().node()) || isKnownNotNumber(node->child2().node()))
- callOperation(operationValueAddNotNumber, resultTag.gpr(), resultPayload.gpr(), op1TagGPR, op1PayloadGPR, op2TagGPR, op2PayloadGPR);
- else
- callOperation(operationValueAdd, resultTag.gpr(), resultPayload.gpr(), op1TagGPR, op1PayloadGPR, op2TagGPR, op2PayloadGPR);
-
- jsValueResult(resultTag.gpr(), resultPayload.gpr(), node);
-}
-
void SpeculativeJIT::compileObjectOrOtherLogicalNot(Edge nodeUse)
{
JSValueOperand value(this, nodeUse, ManualOperandSpeculation);
@@ -2072,7 +2050,28 @@
break;
}
- case ValueAdd:
+ case ValueAdd: {
+ JSValueOperand op1(this, node->child1());
+ JSValueOperand op2(this, node->child2());
+
+ GPRReg op1TagGPR = op1.tagGPR();
+ GPRReg op1PayloadGPR = op1.payloadGPR();
+ GPRReg op2TagGPR = op2.tagGPR();
+ GPRReg op2PayloadGPR = op2.payloadGPR();
+
+ flushRegisters();
+
+ GPRResult2 resultTag(this);
+ GPRResult resultPayload(this);
+ if (isKnownNotNumber(node->child1().node()) || isKnownNotNumber(node->child2().node()))
+ callOperation(operationValueAddNotNumber, resultTag.gpr(), resultPayload.gpr(), op1TagGPR, op1PayloadGPR, op2TagGPR, op2PayloadGPR);
+ else
+ callOperation(operationValueAdd, resultTag.gpr(), resultPayload.gpr(), op1TagGPR, op1PayloadGPR, op2TagGPR, op2PayloadGPR);
+
+ jsValueResult(resultTag.gpr(), resultPayload.gpr(), node);
+ break;
+ }
+
case ArithAdd:
compileAdd(node);
break;
diff --git a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp
index af1010c..f95ba00 100644
--- a/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp
+++ b/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp
@@ -1806,25 +1806,6 @@
jsValueResult(result.gpr(), node, 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().node()) || isKnownNotNumber(node->child2().node()))
- callOperation(operationValueAddNotNumber, result.gpr(), op1GPR, op2GPR);
- else
- callOperation(operationValueAdd, result.gpr(), op1GPR, op2GPR);
-
- jsValueResult(result.gpr(), node);
-}
-
void SpeculativeJIT::compileObjectOrOtherLogicalNot(Edge nodeUse)
{
JSValueOperand value(this, nodeUse, ManualOperandSpeculation);
@@ -2403,7 +2384,25 @@
break;
}
- case ValueAdd:
+ case ValueAdd: {
+ 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().node()) || isKnownNotNumber(node->child2().node()))
+ callOperation(operationValueAddNotNumber, result.gpr(), op1GPR, op2GPR);
+ else
+ callOperation(operationValueAdd, result.gpr(), op1GPR, op2GPR);
+
+ jsValueResult(result.gpr(), node);
+ break;
+ }
+
case ArithAdd:
compileAdd(node);
break;
diff --git a/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp b/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp
index a0aa879..ade4855 100644
--- a/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp
+++ b/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp
@@ -261,8 +261,10 @@
case Phantom:
compilePhantom();
break;
- case ArithAdd:
case ValueAdd:
+ compileValueAdd();
+ break;
+ case ArithAdd:
compileAddSub();
break;
case ArithSub:
@@ -763,6 +765,19 @@
DFG_NODE_DO_TO_CHILDREN(m_graph, m_node, speculate);
}
+ void compileValueAdd()
+ {
+ J_JITOperation_EJJ operation;
+ if (!(m_state.forNode(m_node->child1()).m_type & SpecFullNumber)
+ && !(m_state.forNode(m_node->child2()).m_type & SpecFullNumber))
+ operation = operationValueAddNotNumber;
+ else
+ operation = operationValueAdd;
+ setJSValue(vmCall(
+ m_out.operation(operation), m_callFrame,
+ lowJSValue(m_node->child1()), lowJSValue(m_node->child2())));
+ }
+
void compileAddSub()
{
bool isSub = m_node->op() == ArithSub;
