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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/176625">176625</a></dd>
<dt>Author</dt> <dd>msaboff@apple.com</dd>
<dt>Date</dt> <dd>2014-12-01 20:09:24 -0800 (Mon, 01 Dec 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>Remove GetMyScope node from DFG
https://bugs.webkit.org/show_bug.cgi?id=139166
Reviewed by Oliver Hunt.
Eliminated GetMyScope DFG node type.
* dfg/DFGAbstractInterpreterInlines.h:
(JSC::DFG::AbstractInterpreter<AbstractStateType>::executeEffects):
* dfg/DFGClobberize.h:
(JSC::DFG::clobberize):
* dfg/DFGDoesGC.cpp:
(JSC::DFG::doesGC):
* dfg/DFGFixupPhase.cpp:
(JSC::DFG::FixupPhase::fixupNode):
* dfg/DFGGraph.cpp:
(JSC::DFG::Graph::isLiveInBytecode):
* dfg/DFGNodeType.h:
* dfg/DFGPredictionPropagationPhase.cpp:
(JSC::DFG::PredictionPropagationPhase::propagate):
* dfg/DFGSafeToExecute.h:
(JSC::DFG::safeToExecute):
* dfg/DFGSpeculativeJIT32_64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* dfg/DFGSpeculativeJIT64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* ftl/FTLCapabilities.cpp:
(JSC::FTL::canCompile):
* ftl/FTLLowerDFGToLLVM.cpp:
(JSC::FTL::LowerDFGToLLVM::compileNode):
(JSC::FTL::LowerDFGToLLVM::compileGetMyScope): Deleted.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGAbstractInterpreterInlinesh">trunk/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGClobberizeh">trunk/Source/JavaScriptCore/dfg/DFGClobberize.h</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGDoesGCcpp">trunk/Source/JavaScriptCore/dfg/DFGDoesGC.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGFixupPhasecpp">trunk/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGGraphcpp">trunk/Source/JavaScriptCore/dfg/DFGGraph.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGNodeTypeh">trunk/Source/JavaScriptCore/dfg/DFGNodeType.h</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGPredictionPropagationPhasecpp">trunk/Source/JavaScriptCore/dfg/DFGPredictionPropagationPhase.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGSafeToExecuteh">trunk/Source/JavaScriptCore/dfg/DFGSafeToExecute.h</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGSpeculativeJIT32_64cpp">trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoredfgDFGSpeculativeJIT64cpp">trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreftlFTLCapabilitiescpp">trunk/Source/JavaScriptCore/ftl/FTLCapabilities.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreftlFTLLowerDFGToLLVMcpp">trunk/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/ChangeLog 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -1,5 +1,39 @@
</span><span class="cx"> 2014-12-01 Michael Saboff <msaboff@apple.com>
</span><span class="cx">
</span><ins>+ Remove GetMyScope node from DFG
+ https://bugs.webkit.org/show_bug.cgi?id=139166
+
+ Reviewed by Oliver Hunt.
+
+ Eliminated GetMyScope DFG node type.
+
+ * dfg/DFGAbstractInterpreterInlines.h:
+ (JSC::DFG::AbstractInterpreter<AbstractStateType>::executeEffects):
+ * dfg/DFGClobberize.h:
+ (JSC::DFG::clobberize):
+ * dfg/DFGDoesGC.cpp:
+ (JSC::DFG::doesGC):
+ * dfg/DFGFixupPhase.cpp:
+ (JSC::DFG::FixupPhase::fixupNode):
+ * dfg/DFGGraph.cpp:
+ (JSC::DFG::Graph::isLiveInBytecode):
+ * dfg/DFGNodeType.h:
+ * dfg/DFGPredictionPropagationPhase.cpp:
+ (JSC::DFG::PredictionPropagationPhase::propagate):
+ * dfg/DFGSafeToExecute.h:
+ (JSC::DFG::safeToExecute):
+ * dfg/DFGSpeculativeJIT32_64.cpp:
+ (JSC::DFG::SpeculativeJIT::compile):
+ * dfg/DFGSpeculativeJIT64.cpp:
+ (JSC::DFG::SpeculativeJIT::compile):
+ * ftl/FTLCapabilities.cpp:
+ (JSC::FTL::canCompile):
+ * ftl/FTLLowerDFGToLLVM.cpp:
+ (JSC::FTL::LowerDFGToLLVM::compileNode):
+ (JSC::FTL::LowerDFGToLLVM::compileGetMyScope): Deleted.
+
+2014-12-01 Michael Saboff <msaboff@apple.com>
+
</ins><span class="cx"> Crash (integer overflow) beneath ByteCodeParser::handleGetById typing in search field on weather.com
</span><span class="cx"> https://bugs.webkit.org/show_bug.cgi?id=139165
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGAbstractInterpreterInlinesh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/dfg/DFGAbstractInterpreterInlines.h 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -1408,7 +1408,6 @@
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> case GetScope: // FIXME: We could get rid of these if we know that the JSFunction is a constant. https://bugs.webkit.org/show_bug.cgi?id=106202
</span><del>- case GetMyScope:
</del><span class="cx"> forNode(node).setType(SpecObjectOther);
</span><span class="cx"> break;
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGClobberizeh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGClobberize.h (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGClobberize.h 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/dfg/DFGClobberize.h 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -745,14 +745,6 @@
</span><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx">
</span><del>- case GetMyScope:
- if (graph.m_codeBlock->needsActivation()) {
- read(AbstractHeap(Variables, JSStack::ScopeChain));
- def(HeapLocation(VariableLoc, AbstractHeap(Variables, JSStack::ScopeChain)), node);
- } else
- def(PureValue(node));
- return;
-
</del><span class="cx"> case GetClosureRegisters:
</span><span class="cx"> read(JSEnvironmentRecord_registers);
</span><span class="cx"> def(HeapLocation(ClosureRegistersLoc, JSEnvironmentRecord_registers, node->child1()), node);
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGDoesGCcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGDoesGC.cpp (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGDoesGC.cpp 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/dfg/DFGDoesGC.cpp 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -95,7 +95,6 @@
</span><span class="cx"> case GetButterfly:
</span><span class="cx"> case CheckArray:
</span><span class="cx"> case GetScope:
</span><del>- case GetMyScope:
</del><span class="cx"> case SkipScope:
</span><span class="cx"> case GetClosureRegisters:
</span><span class="cx"> case GetClosureVar:
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGFixupPhasecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/dfg/DFGFixupPhase.cpp 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -1192,7 +1192,6 @@
</span><span class="cx"> case Flush:
</span><span class="cx"> case PhantomLocal:
</span><span class="cx"> case GetLocalUnlinked:
</span><del>- case GetMyScope:
</del><span class="cx"> case GetClosureVar:
</span><span class="cx"> case GetGlobalVar:
</span><span class="cx"> case NotifyWrite:
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGGraphcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGGraph.cpp (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGGraph.cpp 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/dfg/DFGGraph.cpp 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -887,8 +887,6 @@
</span><span class="cx">
</span><span class="cx"> if (reg.offset() == JSStack::Callee)
</span><span class="cx"> return true;
</span><del>- if (reg.offset() == JSStack::ScopeChain)
- return true;
</del><span class="cx">
</span><span class="cx"> return false;
</span><span class="cx"> }
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGNodeTypeh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGNodeType.h (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGNodeType.h 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/dfg/DFGNodeType.h 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -177,7 +177,6 @@
</span><span class="cx"> macro(GetArrayLength, NodeResultInt32) \
</span><span class="cx"> macro(GetTypedArrayByteOffset, NodeResultInt32) \
</span><span class="cx"> macro(GetScope, NodeResultJS) \
</span><del>- macro(GetMyScope, NodeResultJS) \
</del><span class="cx"> macro(SkipScope, NodeResultJS) \
</span><span class="cx"> macro(GetClosureRegisters, NodeResultStorage) \
</span><span class="cx"> macro(GetClosureVar, NodeResultJS) \
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGPredictionPropagationPhasecpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGPredictionPropagationPhase.cpp (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGPredictionPropagationPhase.cpp 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/dfg/DFGPredictionPropagationPhase.cpp 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -462,7 +462,6 @@
</span><span class="cx"> break;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- case GetMyScope:
</del><span class="cx"> case SkipScope: {
</span><span class="cx"> changed |= setPrediction(SpecObjectOther);
</span><span class="cx"> break;
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGSafeToExecuteh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGSafeToExecute.h (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGSafeToExecute.h 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/dfg/DFGSafeToExecute.h 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -167,7 +167,6 @@
</span><span class="cx"> case Arrayify:
</span><span class="cx"> case ArrayifyToStructure:
</span><span class="cx"> case GetScope:
</span><del>- case GetMyScope:
</del><span class="cx"> case SkipScope:
</span><span class="cx"> case GetClosureRegisters:
</span><span class="cx"> case GetClosureVar:
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGSpeculativeJIT32_64cpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT32_64.cpp 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -3525,15 +3525,6 @@
</span><span class="cx"> break;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- case GetMyScope: {
- GPRTemporary result(this);
- GPRReg resultGPR = result.gpr();
-
- m_jit.loadPtr(JITCompiler::payloadFor(JSStack::ScopeChain), resultGPR);
- cellResult(resultGPR, node);
- break;
- }
-
</del><span class="cx"> case SkipScope: {
</span><span class="cx"> SpeculateCellOperand scope(this, node->child1());
</span><span class="cx"> GPRTemporary result(this, Reuse, scope);
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoredfgDFGSpeculativeJIT64cpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -3633,15 +3633,6 @@
</span><span class="cx"> break;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- case GetMyScope: {
- GPRTemporary result(this);
- GPRReg resultGPR = result.gpr();
-
- m_jit.loadPtr(JITCompiler::addressFor(JSStack::ScopeChain), resultGPR);
- cellResult(resultGPR, node);
- break;
- }
-
</del><span class="cx"> case SkipScope: {
</span><span class="cx"> SpeculateCellOperand scope(this, node->child1());
</span><span class="cx"> GPRTemporary result(this, Reuse, scope);
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreftlFTLCapabilitiescpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ftl/FTLCapabilities.cpp (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ftl/FTLCapabilities.cpp 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/ftl/FTLCapabilities.cpp 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -99,7 +99,6 @@
</span><span class="cx"> case Upsilon:
</span><span class="cx"> case ExtractOSREntryLocal:
</span><span class="cx"> case LoopHint:
</span><del>- case GetMyScope:
</del><span class="cx"> case SkipScope:
</span><span class="cx"> case GetClosureRegisters:
</span><span class="cx"> case GetClosureVar:
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreftlFTLLowerDFGToLLVMcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp (176624 => 176625)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp 2014-12-02 02:50:15 UTC (rev 176624)
+++ trunk/Source/JavaScriptCore/ftl/FTLLowerDFGToLLVM.cpp 2014-12-02 04:09:24 UTC (rev 176625)
</span><span class="lines">@@ -592,9 +592,6 @@
</span><span class="cx"> case GetScope:
</span><span class="cx"> compileGetScope();
</span><span class="cx"> break;
</span><del>- case GetMyScope:
- compileGetMyScope();
- break;
</del><span class="cx"> case SkipScope:
</span><span class="cx"> compileSkipScope();
</span><span class="cx"> break;
</span><span class="lines">@@ -3424,12 +3421,6 @@
</span><span class="cx"> setJSValue(m_out.loadPtr(lowCell(m_node->child1()), m_heaps.JSFunction_scope));
</span><span class="cx"> }
</span><span class="cx">
</span><del>- void compileGetMyScope()
- {
- setJSValue(m_out.loadPtr(addressFor(
- m_node->origin.semantic.stackOffset() + JSStack::ScopeChain)));
- }
-
</del><span class="cx"> void compileSkipScope()
</span><span class="cx"> {
</span><span class="cx"> setJSValue(m_out.loadPtr(lowCell(m_node->child1()), m_heaps.JSScope_next));
</span></span></pre>
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