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<title>[174610] trunk/Source/JavaScriptCore</title>
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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/174610">174610</a></dd>
<dt>Author</dt> <dd>commit-queue@webkit.org</dd>
<dt>Date</dt> <dd>2014-10-10 13:30:32 -0700 (Fri, 10 Oct 2014)</dd>
</dl>
<h3>Log Message</h3>
<pre>Unreviewed, rolling out <a href="http://trac.webkit.org/projects/webkit/changeset/174606">r174606</a>.
https://bugs.webkit.org/show_bug.cgi?id=137621
broke a JSC test (Requested by estes on #webkit).
Reverted changeset:
"Various arguments optimisations in codegen fail to account
for arguments being in lexical record"
https://bugs.webkit.org/show_bug.cgi?id=137617
http://trac.webkit.org/changeset/174606</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCorebytecodeCodeBlockcpp">trunk/Source/JavaScriptCore/bytecode/CodeBlock.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCorebytecompilerBytecodeGeneratorcpp">trunk/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCorebytecompilerBytecodeGeneratorh">trunk/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.h</a></li>
<li><a href="#trunkSourceJavaScriptCorebytecompilerNodesCodegencpp">trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreinterpreterStackVisitorcpp">trunk/Source/JavaScriptCore/interpreter/StackVisitor.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreparserNodesh">trunk/Source/JavaScriptCore/parser/Nodes.h</a></li>
<li><a href="#trunkSourceJavaScriptCoreparserParsercpp">trunk/Source/JavaScriptCore/parser/Parser.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreparserParserh">trunk/Source/JavaScriptCore/parser/Parser.h</a></li>
<li><a href="#trunkSourceJavaScriptCoreparserParserModesh">trunk/Source/JavaScriptCore/parser/ParserModes.h</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (174609 => 174610)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2014-10-10 20:20:15 UTC (rev 174609)
+++ trunk/Source/JavaScriptCore/ChangeLog 2014-10-10 20:30:32 UTC (rev 174610)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2014-10-10 Commit Queue <commit-queue@webkit.org>
+
+ Unreviewed, rolling out r174606.
+ https://bugs.webkit.org/show_bug.cgi?id=137621
+
+ broke a JSC test (Requested by estes on #webkit).
+
+ Reverted changeset:
+
+ "Various arguments optimisations in codegen fail to account
+ for arguments being in lexical record"
+ https://bugs.webkit.org/show_bug.cgi?id=137617
+ http://trac.webkit.org/changeset/174606
+
</ins><span class="cx"> 2014-10-10 Oliver Hunt <oliver@apple.com>
</span><span class="cx">
</span><span class="cx"> Various arguments optimisations in codegen fail to account for arguments being in lexical record
</span></span></pre></div>
<a id="trunkSourceJavaScriptCorebytecodeCodeBlockcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/bytecode/CodeBlock.cpp (174609 => 174610)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/bytecode/CodeBlock.cpp 2014-10-10 20:20:15 UTC (rev 174609)
+++ trunk/Source/JavaScriptCore/bytecode/CodeBlock.cpp 2014-10-10 20:30:32 UTC (rev 174610)
</span><span class="lines">@@ -3887,8 +3887,6 @@
</span><span class="cx">
</span><span class="cx"> if (codeBlock->usesArguments() && virtualReg == codeBlock->argumentsRegister())
</span><span class="cx"> return;
</span><del>- if (codeBlock->usesArguments() && virtualReg == unmodifiedArgumentsRegister(codeBlock->argumentsRegister()))
- return;
</del><span class="cx">
</span><span class="cx"> if (codeBlock->captureCount() && codeBlock->symbolTable()->isCaptured(operand)) {
</span><span class="cx"> codeBlock->beginValidationDidFail();
</span></span></pre></div>
<a id="trunkSourceJavaScriptCorebytecompilerBytecodeGeneratorcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp (174609 => 174610)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp 2014-10-10 20:20:15 UTC (rev 174609)
+++ trunk/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.cpp 2014-10-10 20:30:32 UTC (rev 174610)
</span><span class="lines">@@ -167,7 +167,6 @@
</span><span class="cx"> , m_lexicalEnvironmentRegister(0)
</span><span class="cx"> , m_emptyValueRegister(0)
</span><span class="cx"> , m_globalObjectRegister(0)
</span><del>- , m_localArgumentsRegister(0)
</del><span class="cx"> , m_finallyDepth(0)
</span><span class="cx"> , m_localScopeDepth(0)
</span><span class="cx"> , m_codeType(GlobalCode)
</span><span class="lines">@@ -212,7 +211,6 @@
</span><span class="cx"> , m_lexicalEnvironmentRegister(0)
</span><span class="cx"> , m_emptyValueRegister(0)
</span><span class="cx"> , m_globalObjectRegister(0)
</span><del>- , m_localArgumentsRegister(0)
</del><span class="cx"> , m_finallyDepth(0)
</span><span class="cx"> , m_localScopeDepth(0)
</span><span class="cx"> , m_codeType(FunctionCode)
</span><span class="lines">@@ -252,7 +250,6 @@
</span><span class="cx"> emitOpcode(op_create_lexical_environment);
</span><span class="cx"> instructions().append(m_lexicalEnvironmentRegister->index());
</span><span class="cx"> }
</span><del>- RegisterID* localArgumentsRegister = nullptr;
</del><span class="cx"> RegisterID* scratch = addVar();
</span><span class="cx"> m_symbolTable->setCaptureStart(virtualRegisterForLocal(m_codeBlock->m_numVars).offset());
</span><span class="cx">
</span><span class="lines">@@ -260,8 +257,6 @@
</span><span class="cx"> RegisterID* unmodifiedArgumentsRegister = addVar(); // Anonymous, so it can't be modified by user code.
</span><span class="cx"> RegisterID* argumentsRegister = addVar(propertyNames().arguments, IsVariable, NotWatchable); // Can be changed by assigning to 'arguments'.
</span><span class="cx">
</span><del>- localArgumentsRegister = argumentsRegister;
-
</del><span class="cx"> // We can save a little space by hard-coding the knowledge that the two
</span><span class="cx"> // 'arguments' values are stored in consecutive registers, and storing
</span><span class="cx"> // only the index of the assignable one.
</span><span class="lines">@@ -279,15 +274,6 @@
</span><span class="cx"> initializeCapturedVariable(argumentsRegister, propertyNames().arguments, argumentsRegister);
</span><span class="cx"> RegisterID* uncheckedArgumentsRegister = &registerFor(JSC::unmodifiedArgumentsRegister(m_codeBlock->argumentsRegister()).offset());
</span><span class="cx"> initializeCapturedVariable(uncheckedArgumentsRegister, propertyNames().arguments, uncheckedArgumentsRegister);
</span><del>- if (functionBody->modifiesArguments()) {
- emitOpcode(op_mov);
- instructions().append(argumentsRegister->index());
- instructions().append(addConstantValue(jsUndefined())->index());
- emitOpcode(op_mov);
- instructions().append(uncheckedArgumentsRegister->index());
- instructions().append(addConstantValue(jsUndefined())->index());
- localArgumentsRegister = nullptr;
- }
</del><span class="cx"> }
</span><span class="cx"> }
</span><span class="cx"> }
</span><span class="lines">@@ -400,7 +386,6 @@
</span><span class="cx"> int nextParameterIndex = CallFrame::thisArgumentOffset();
</span><span class="cx"> m_thisRegister.setIndex(nextParameterIndex++);
</span><span class="cx"> m_codeBlock->addParameter();
</span><del>-
</del><span class="cx"> for (size_t i = 0; i < parameters.size(); ++i, ++nextParameterIndex) {
</span><span class="cx"> int index = nextParameterIndex;
</span><span class="cx"> auto pattern = parameters.at(i);
</span><span class="lines">@@ -434,7 +419,6 @@
</span><span class="cx"> instructions().append(0);
</span><span class="cx"> instructions().append(0);
</span><span class="cx"> }
</span><del>- m_localArgumentsRegister = localArgumentsRegister;
</del><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> BytecodeGenerator::BytecodeGenerator(VM& vm, EvalNode* evalNode, UnlinkedEvalCodeBlock* codeBlock, DebuggerMode debuggerMode, ProfilerMode profilerMode)
</span><span class="lines">@@ -447,7 +431,6 @@
</span><span class="cx"> , m_lexicalEnvironmentRegister(0)
</span><span class="cx"> , m_emptyValueRegister(0)
</span><span class="cx"> , m_globalObjectRegister(0)
</span><del>- , m_localArgumentsRegister(0)
</del><span class="cx"> , m_finallyDepth(0)
</span><span class="cx"> , m_localScopeDepth(0)
</span><span class="cx"> , m_codeType(EvalCode)
</span><span class="lines">@@ -562,17 +545,19 @@
</span><span class="cx"> if (entry.isNull())
</span><span class="cx"> return false;
</span><span class="cx">
</span><del>- if (m_codeBlock->usesArguments() && m_codeType == FunctionCode && m_localArgumentsRegister)
</del><ins>+ if (m_codeBlock->usesArguments() && m_codeType == FunctionCode)
</ins><span class="cx"> return true;
</span><span class="cx">
</span><span class="cx"> return false;
</span><span class="cx"> }
</span><span class="cx">
</span><del>-RegisterID* BytecodeGenerator::uncheckedLocalArgumentsRegister()
</del><ins>+RegisterID* BytecodeGenerator::uncheckedRegisterForArguments()
</ins><span class="cx"> {
</span><span class="cx"> ASSERT(willResolveToArguments(propertyNames().arguments));
</span><del>- ASSERT(m_localArgumentsRegister);
- return m_localArgumentsRegister;
</del><ins>+
+ SymbolTableEntry entry = symbolTable().get(propertyNames().arguments.impl());
+ ASSERT(!entry.isNull());
+ return &registerFor(entry.getIndex());
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> RegisterID* BytecodeGenerator::createLazyRegisterIfNecessary(RegisterID* reg)
</span><span class="lines">@@ -1843,7 +1828,7 @@
</span><span class="cx"> auto expression = static_cast<SpreadExpressionNode*>(n->m_expr)->expression();
</span><span class="cx"> RefPtr<RegisterID> argumentRegister;
</span><span class="cx"> if (expression->isResolveNode() && willResolveToArguments(static_cast<ResolveNode*>(expression)->identifier()) && !symbolTable().slowArguments())
</span><del>- argumentRegister = uncheckedLocalArgumentsRegister();
</del><ins>+ argumentRegister = uncheckedRegisterForArguments();
</ins><span class="cx"> else
</span><span class="cx"> argumentRegister = expression->emitBytecode(*this, callArguments.argumentRegister(0));
</span><span class="cx"> RefPtr<RegisterID> thisRegister = emitMove(newTemporary(), callArguments.thisRegister());
</span><span class="lines">@@ -1985,7 +1970,7 @@
</span><span class="cx"> auto expression = static_cast<SpreadExpressionNode*>(n->m_expr)->expression();
</span><span class="cx"> RefPtr<RegisterID> argumentRegister;
</span><span class="cx"> if (expression->isResolveNode() && willResolveToArguments(static_cast<ResolveNode*>(expression)->identifier()) && !symbolTable().slowArguments())
</span><del>- argumentRegister = uncheckedLocalArgumentsRegister();
</del><ins>+ argumentRegister = uncheckedRegisterForArguments();
</ins><span class="cx"> else
</span><span class="cx"> argumentRegister = expression->emitBytecode(*this, callArguments.argumentRegister(0));
</span><span class="cx"> return emitConstructVarargs(dst, func, argumentRegister.get(), newTemporary(), 0, callArguments.profileHookRegister(), divot, divotStart, divotEnd);
</span><span class="lines">@@ -2553,13 +2538,13 @@
</span><span class="cx"> emitJump(loopCondition.get());
</span><span class="cx"> emitLabel(loopStart.get());
</span><span class="cx"> emitLoopHint();
</span><del>- emitGetArgumentByVal(value.get(), uncheckedLocalArgumentsRegister(), index.get());
</del><ins>+ emitGetArgumentByVal(value.get(), uncheckedRegisterForArguments(), index.get());
</ins><span class="cx"> callBack(*this, value.get());
</span><span class="cx">
</span><span class="cx"> emitLabel(scope->continueTarget());
</span><span class="cx"> emitInc(index.get());
</span><span class="cx"> emitLabel(loopCondition.get());
</span><del>- RefPtr<RegisterID> length = emitGetArgumentsLength(newTemporary(), uncheckedLocalArgumentsRegister());
</del><ins>+ RefPtr<RegisterID> length = emitGetArgumentsLength(newTemporary(), uncheckedRegisterForArguments());
</ins><span class="cx"> emitJumpIfTrue(emitEqualityOp(op_less, newTemporary(), index.get(), length.get()), loopStart.get());
</span><span class="cx"> emitLabel(scope->breakTarget());
</span><span class="cx"> return;
</span></span></pre></div>
<a id="trunkSourceJavaScriptCorebytecompilerBytecodeGeneratorh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.h (174609 => 174610)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.h 2014-10-10 20:20:15 UTC (rev 174609)
+++ trunk/Source/JavaScriptCore/bytecompiler/BytecodeGenerator.h 2014-10-10 20:30:32 UTC (rev 174610)
</span><span class="lines">@@ -277,10 +277,8 @@
</span><span class="cx"> void setIsNumericCompareFunction(bool isNumericCompareFunction);
</span><span class="cx">
</span><span class="cx"> bool willResolveToArguments(const Identifier&);
</span><ins>+ RegisterID* uncheckedRegisterForArguments();
</ins><span class="cx">
</span><del>- bool hasSafeLocalArgumentsRegister() { return m_localArgumentsRegister; }
- RegisterID* uncheckedLocalArgumentsRegister();
-
</del><span class="cx"> bool isCaptured(int operand);
</span><span class="cx"> CaptureMode captureMode(int operand) { return isCaptured(operand) ? IsCaptured : NotCaptured; }
</span><span class="cx">
</span><span class="lines">@@ -754,8 +752,6 @@
</span><span class="cx"> RegisterID* m_lexicalEnvironmentRegister;
</span><span class="cx"> RegisterID* m_emptyValueRegister;
</span><span class="cx"> RegisterID* m_globalObjectRegister;
</span><del>- RegisterID* m_localArgumentsRegister;
-
</del><span class="cx"> Vector<Identifier, 16> m_watchableVariables;
</span><span class="cx"> SegmentedVector<RegisterID, 32> m_constantPoolRegisters;
</span><span class="cx"> SegmentedVector<RegisterID, 32> m_calleeRegisters;
</span></span></pre></div>
<a id="trunkSourceJavaScriptCorebytecompilerNodesCodegencpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp (174609 => 174610)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp 2014-10-10 20:20:15 UTC (rev 174609)
+++ trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp 2014-10-10 20:30:32 UTC (rev 174610)
</span><span class="lines">@@ -386,7 +386,7 @@
</span><span class="cx"> && !generator.symbolTable().slowArguments()) {
</span><span class="cx"> RegisterID* property = generator.emitNode(m_subscript);
</span><span class="cx"> generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
</span><del>- return generator.emitGetArgumentByVal(generator.finalDestination(dst), generator.uncheckedLocalArgumentsRegister(), property);
</del><ins>+ return generator.emitGetArgumentByVal(generator.finalDestination(dst), generator.uncheckedRegisterForArguments(), property);
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> RefPtr<RegisterID> base = generator.emitNodeForLeftHandSide(m_base, m_subscriptHasAssignments, m_subscript->isPure(generator));
</span><span class="lines">@@ -412,7 +412,7 @@
</span><span class="cx"> if (!generator.willResolveToArguments(resolveNode->identifier()))
</span><span class="cx"> goto nonArgumentsPath;
</span><span class="cx"> generator.emitExpressionInfo(divot(), divotStart(), divotEnd());
</span><del>- return generator.emitGetArgumentsLength(generator.finalDestination(dst), generator.uncheckedLocalArgumentsRegister());
</del><ins>+ return generator.emitGetArgumentsLength(generator.finalDestination(dst), generator.uncheckedRegisterForArguments());
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> nonArgumentsPath:
</span><span class="lines">@@ -593,7 +593,7 @@
</span><span class="cx"> && generator.willResolveToArguments(static_cast<ResolveNode*>(base)->identifier())
</span><span class="cx"> && !generator.symbolTable().slowArguments()) {
</span><span class="cx"> generator.emitExpressionInfo(divot, divotStart, divotEnd);
</span><del>- return generator.emitGetArgumentByVal(generator.finalDestination(dst), generator.uncheckedLocalArgumentsRegister(), property);
</del><ins>+ return generator.emitGetArgumentByVal(generator.finalDestination(dst), generator.uncheckedRegisterForArguments(), property);
</ins><span class="cx"> }
</span><span class="cx"> return nullptr;
</span><span class="cx"> }
</span><span class="lines">@@ -621,7 +621,7 @@
</span><span class="cx"> RefPtr<RegisterID> thisRegister = getArgumentByVal(generator, subject, generator.emitLoad(0, jsNumber(0)), 0, spread->divot(), spread->divotStart(), spread->divotEnd());
</span><span class="cx"> RefPtr<RegisterID> argumentsRegister;
</span><span class="cx"> if (thisRegister)
</span><del>- argumentsRegister = generator.uncheckedLocalArgumentsRegister();
</del><ins>+ argumentsRegister = generator.uncheckedRegisterForArguments();
</ins><span class="cx"> else {
</span><span class="cx"> argumentsRegister = generator.emitNode(subject);
</span><span class="cx"> generator.emitExpressionInfo(spread->divot(), spread->divotStart(), spread->divotEnd());
</span><span class="lines">@@ -749,7 +749,7 @@
</span><span class="cx"> RefPtr<RegisterID> argsRegister;
</span><span class="cx"> ArgumentListNode* args = m_args->m_listNode->m_next;
</span><span class="cx"> if (args->m_expr->isResolveNode() && generator.willResolveToArguments(static_cast<ResolveNode*>(args->m_expr)->identifier()) && !generator.symbolTable().slowArguments())
</span><del>- argsRegister = generator.uncheckedLocalArgumentsRegister();
</del><ins>+ argsRegister = generator.uncheckedRegisterForArguments();
</ins><span class="cx"> else
</span><span class="cx"> argsRegister = generator.emitNode(args->m_expr);
</span><span class="cx">
</span><span class="lines">@@ -2721,7 +2721,7 @@
</span><span class="cx"> {
</span><span class="cx"> if (rhs->isResolveNode()
</span><span class="cx"> && generator.willResolveToArguments(static_cast<ResolveNode*>(rhs)->identifier())
</span><del>- && generator.hasSafeLocalArgumentsRegister()&& !generator.symbolTable().slowArguments()) {
</del><ins>+ && !generator.symbolTable().slowArguments()) {
</ins><span class="cx"> for (size_t i = 0; i < m_targetPatterns.size(); i++) {
</span><span class="cx"> auto target = m_targetPatterns[i];
</span><span class="cx"> if (!target)
</span><span class="lines">@@ -2729,7 +2729,7 @@
</span><span class="cx">
</span><span class="cx"> RefPtr<RegisterID> temp = generator.newTemporary();
</span><span class="cx"> generator.emitLoad(temp.get(), jsNumber(i));
</span><del>- generator.emitGetArgumentByVal(temp.get(), generator.uncheckedLocalArgumentsRegister(), temp.get());
</del><ins>+ generator.emitGetArgumentByVal(temp.get(), generator.uncheckedRegisterForArguments(), temp.get());
</ins><span class="cx"> target->bindValue(generator, temp.get());
</span><span class="cx"> }
</span><span class="cx"> if (dst == generator.ignoredResult() || !dst)
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreinterpreterStackVisitorcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/interpreter/StackVisitor.cpp (174609 => 174610)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/interpreter/StackVisitor.cpp 2014-10-10 20:20:15 UTC (rev 174609)
+++ trunk/Source/JavaScriptCore/interpreter/StackVisitor.cpp 2014-10-10 20:30:32 UTC (rev 174610)
</span><span class="lines">@@ -295,9 +295,6 @@
</span><span class="cx"> else
</span><span class="cx"> #endif // ENABLE(DFG_JIT)
</span><span class="cx"> reg = codeBlock()->argumentsRegister();
</span><del>-
- if (codeBlock()->needsActivation())
- return jsCast<Arguments*>(callFrame()->lexicalEnvironment()->registerAt(unmodifiedArgumentsRegister(reg).offset()).get());
</del><span class="cx">
</span><span class="cx"> JSValue result = callFrame()->r(unmodifiedArgumentsRegister(reg).offset()).jsValue();
</span><span class="cx"> if (!result || !result.isCell()) // Protect against Undefined in case we throw in op_enter.
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreparserNodesh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/parser/Nodes.h (174609 => 174610)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/parser/Nodes.h 2014-10-10 20:20:15 UTC (rev 174609)
+++ trunk/Source/JavaScriptCore/parser/Nodes.h 2014-10-10 20:30:32 UTC (rev 174610)
</span><span class="lines">@@ -1440,7 +1440,6 @@
</span><span class="cx"> bool usesEval() const { return m_features & EvalFeature; }
</span><span class="cx"> bool usesArguments() const { return (m_features & ArgumentsFeature) && !(m_features & ShadowsArgumentsFeature); }
</span><span class="cx"> bool modifiesParameter() const { return m_features & ModifiedParameterFeature; }
</span><del>- bool modifiesArguments() const { return m_features & (EvalFeature | ModifiedArgumentsFeature); }
</del><span class="cx"> bool isStrictMode() const { return m_features & StrictModeFeature; }
</span><span class="cx"> void setUsesArguments() { m_features |= ArgumentsFeature; }
</span><span class="cx"> bool usesThis() const { return m_features & ThisFeature; }
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreparserParsercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/parser/Parser.cpp (174609 => 174610)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/parser/Parser.cpp 2014-10-10 20:20:15 UTC (rev 174609)
+++ trunk/Source/JavaScriptCore/parser/Parser.cpp 2014-10-10 20:30:32 UTC (rev 174610)
</span><span class="lines">@@ -271,8 +271,7 @@
</span><span class="cx">
</span><span class="cx"> IdentifierSet capturedVariables;
</span><span class="cx"> bool modifiedParameter = false;
</span><del>- bool modifiedArguments = false;
- scope->getCapturedVariables(capturedVariables, modifiedParameter, modifiedArguments);
</del><ins>+ scope->getCapturedVariables(capturedVariables, modifiedParameter);
</ins><span class="cx">
</span><span class="cx"> CodeFeatures features = context.features();
</span><span class="cx"> if (scope->strictMode())
</span><span class="lines">@@ -281,8 +280,7 @@
</span><span class="cx"> features |= ShadowsArgumentsFeature;
</span><span class="cx"> if (modifiedParameter)
</span><span class="cx"> features |= ModifiedParameterFeature;
</span><del>- if (modifiedArguments)
- features |= ModifiedArgumentsFeature;
</del><ins>+
</ins><span class="cx"> Vector<RefPtr<StringImpl>> closedVariables;
</span><span class="cx"> if (m_parsingBuiltin) {
</span><span class="cx"> RELEASE_ASSERT(!capturedVariables.size());
</span><span class="lines">@@ -294,10 +292,6 @@
</span><span class="cx">
</span><span class="cx"> if (scope->hasDeclaredParameter(Identifier(m_vm, variable.get())))
</span><span class="cx"> continue;
</span><del>-
- if (variable == m_vm->propertyNames->arguments.impl())
- continue;
-
</del><span class="cx"> closedVariables.append(variable);
</span><span class="cx"> }
</span><span class="cx"> }
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreparserParserh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/parser/Parser.h (174609 => 174610)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/parser/Parser.h 2014-10-10 20:20:15 UTC (rev 174609)
+++ trunk/Source/JavaScriptCore/parser/Parser.h 2014-10-10 20:30:32 UTC (rev 174610)
</span><span class="lines">@@ -279,7 +279,7 @@
</span><span class="cx"> return true;
</span><span class="cx"> }
</span><span class="cx">
</span><del>- void getCapturedVariables(IdentifierSet& capturedVariables, bool& modifiedParameter, bool& modifiedArguments)
</del><ins>+ void getCapturedVariables(IdentifierSet& capturedVariables, bool& modifiedParameter)
</ins><span class="cx"> {
</span><span class="cx"> if (m_needsFullActivation || m_usesEval) {
</span><span class="cx"> modifiedParameter = true;
</span><span class="lines">@@ -292,13 +292,9 @@
</span><span class="cx"> capturedVariables.add(*ptr);
</span><span class="cx"> }
</span><span class="cx"> modifiedParameter = false;
</span><del>- if (shadowsArguments())
- modifiedArguments = true;
</del><span class="cx"> if (m_declaredParameters.size()) {
</span><span class="cx"> IdentifierSet::iterator end = m_writtenVariables.end();
</span><span class="cx"> for (IdentifierSet::iterator ptr = m_writtenVariables.begin(); ptr != end; ++ptr) {
</span><del>- if (*ptr == m_vm->propertyNames->arguments.impl())
- modifiedArguments = true;
</del><span class="cx"> if (!m_declaredParameters.contains(*ptr))
</span><span class="cx"> continue;
</span><span class="cx"> modifiedParameter = true;
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreparserParserModesh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/parser/ParserModes.h (174609 => 174610)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/parser/ParserModes.h 2014-10-10 20:20:15 UTC (rev 174609)
+++ trunk/Source/JavaScriptCore/parser/ParserModes.h 2014-10-10 20:30:32 UTC (rev 174610)
</span><span class="lines">@@ -75,7 +75,6 @@
</span><span class="cx"> const CodeFeatures StrictModeFeature = 1 << 5;
</span><span class="cx"> const CodeFeatures ShadowsArgumentsFeature = 1 << 6;
</span><span class="cx"> const CodeFeatures ModifiedParameterFeature = 1 << 7;
</span><del>-const CodeFeatures ModifiedArgumentsFeature = 1 << 8;
</del><span class="cx">
</span><span class="cx"> const CodeFeatures AllFeatures = EvalFeature | ArgumentsFeature | WithFeature | CatchFeature | ThisFeature | StrictModeFeature | ShadowsArgumentsFeature | ModifiedParameterFeature;
</span><span class="cx">
</span></span></pre>
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