path: root/Source/JavaScriptCore/ChangeLog

2013-01-02  Simon Hausmann  <simon.hausmann@digia.com>

        [MinGW-w64] Centralize workaround for pow() implementation
        https://bugs.webkit.org/show_bug.cgi?id=105925

        Reviewed by Sam Weinig.

        As suggested by Sam, move the MinGW-w64 workaround into MathExtras.h
        away from the JSC usage.

        * runtime/MathObject.cpp:
        (JSC::mathPow):

2012-12-17  Jonathan Liu  <net147@gmail.com>

        Fix Math.pow implementation with MinGW-w64
        https://bugs.webkit.org/show_bug.cgi?id=105087

        Reviewed by Simon Hausmann.

        The MinGW-w64 runtime has different behaviour for pow()
        compared to other C runtimes. This results in the following
        test262 tests failing with the latest MinGW-w64 runtime:
        - S15.8.2.13_A14
        - S15.8.2.13_A16
        - S15.8.2.13_A20
        - S15.8.2.13_A22

        Handle the special cases that are different with MinGW-w64.

        * runtime/MathObject.cpp:
        (JSC::mathPow):

2012-12-07  Jonathan Liu  <net147@gmail.com>

        Add missing forward declaration for JSC::ArrayAllocationProfile
        https://bugs.webkit.org/show_bug.cgi?id=104425

        Reviewed by Kentaro Hara.

        The header for the JSC::ArrayConstructor class is missing a forward
        declaration for the JSC::ArrayAllocationProfile class which causes
        compilation to fail when compiling with MinGW-w64.

        * runtime/ArrayConstructor.h:
        (JSC):

2012-12-07  Jonathan Liu  <net147@gmail.com>

        Add missing const qualifier to JSC::CodeBlock::getJITType()
        https://bugs.webkit.org/show_bug.cgi?id=104424

        Reviewed by Laszlo Gombos.

        JSC::CodeBlock::getJITType() has the const qualifier when JIT is
        enabled but is missing the const qualifier when JIT is disabled.

        * bytecode/CodeBlock.h:
        (JSC::CodeBlock::getJITType):

2012-11-30  Pierre Rossi  <pierre.rossi@gmail.com>

        [Qt] Unreviewed speculative Mac build fix after r136232

        Update the include path so that LLIntAssembly.h is picked up.
        The bot didn't break until later when a clean build was triggered.

        * JavaScriptCore.pri:

2012-11-30  Allan Sandfeld Jensen  <allan.jensen@digia.com>

        Crash in conversion of empty OpaqueJSString to Identifier 
        https://bugs.webkit.org/show_bug.cgi?id=101867

        Reviewed by NOBODY (OOPS!).

        The constructor call used for both null and empty OpaqueJSStrings results
        in an assertion voilation and crash. This patch instead uses the Identifier
        constructors which are specifically for null and empty Identifier.

        * API/OpaqueJSString.cpp:
        (OpaqueJSString::identifier):

2012-11-30  Tor Arne Vestbø  <tor.arne.vestbo@digia.com>

        [Qt] Place the LLIntOffsetsExtractor binaries in debug/release subdirs on Mac

        Otherwise we'll end up using the same LLIntAssembly.h for both build
        configs of JavaScriptCore -- one of them which will be for the wrong
        config.

        Reviewed by Simon Hausmann.

        * LLIntOffsetsExtractor.pro:

2012-11-30  Julien BRIANCEAU   <jbrianceau@nds.com>

        [sh4] Fix compilation warnings in JavaScriptCore JIT for sh4 arch
        https://bugs.webkit.org/show_bug.cgi?id=103378

        Reviewed by Filip Pizlo.

        * assembler/MacroAssemblerSH4.h:
        (JSC::MacroAssemblerSH4::branchTest32):
        (JSC::MacroAssemblerSH4::branchAdd32):
        (JSC::MacroAssemblerSH4::branchMul32):
        (JSC::MacroAssemblerSH4::branchSub32):
        (JSC::MacroAssemblerSH4::branchOr32):

2012-11-29  Rafael Weinstein  <rafaelw@chromium.org>

        [HTMLTemplateElement] Add feature flag
        https://bugs.webkit.org/show_bug.cgi?id=103694

        Reviewed by Adam Barth.

        This flag will guard the implementation of the HTMLTemplateElement.
        http://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/templates/index.html

        * Configurations/FeatureDefines.xcconfig:

2012-11-29  Filip Pizlo  <fpizlo@apple.com>

        It should be easy to find code blocks in debug dumps
        https://bugs.webkit.org/show_bug.cgi?id=103623

        Reviewed by Goeffrey Garen.

        This gives CodeBlock a relatively strong, but also relatively compact, hash. We compute
        it lazily so that it only impacts run-time when debug support is enabled. We stringify
        it smartly so that it's short and easy to type. We base it on the source code so that
        the optimization level is irrelevant. And, we use SHA1 since it's already in our code
        base. Now, when a piece of code wants to print some debugging to say that it's operating
        on some code block, it can use this CodeBlockHash instead of memory addresses.

        This also takes CodeBlock debugging into the new world of print() and dataLog(). In
        particular, CodeBlock::dump() corresponds to the thing you want printed if you do:

        dataLog("I heart ", *myCodeBlock);

        Probably, you want to just print some identifying information at this point rather than
        the full bytecode dump. So, the existing CodeBlock::dump() has been renamed to
        CodeBlock::dumpBytecode(), and CodeBlock::dump() now prints the CodeBlockHash plus just
        a few little tidbits.
        
        Here's an example of CodeBlock::dump() output:
        
        EkILzr:[0x103883a00, BaselineFunctionCall]
        
        EkILzr is the CodeBlockHash. 0x103883a00 is the CodeBlock's address in memory. The other
        part is self-explanatory.

        Finally, this new notion of CodeBlockHash is available for other purposes like bisecting
        breakage. As such CodeBlockHash has all of the comparison operator overloads. When
        bisecting in DFGDriver.cpp, you can now say things like:
        
        if (codeBlock->hash() < CodeBlockHash("CAAAAA"))
            return false;
        
        And yes, CAAAAA is near the median hash, and the largest one is smaller than E99999. Such
        is life when you use base 62 to encode a 32-bit number.

        * CMakeLists.txt:
        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * Target.pri:
        * bytecode/CallLinkInfo.h:
        (CallLinkInfo):
        (JSC::CallLinkInfo::specializationKind):
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::hash):
        (JSC):
        (JSC::CodeBlock::dumpAssumingJITType):
        (JSC::CodeBlock::dump):
        (JSC::CodeBlock::dumpBytecode):
        (JSC::CodeBlock::CodeBlock):
        (JSC::CodeBlock::finalizeUnconditionally):
        (JSC::CodeBlock::resetStubInternal):
        (JSC::CodeBlock::reoptimize):
        (JSC::ProgramCodeBlock::jettison):
        (JSC::EvalCodeBlock::jettison):
        (JSC::FunctionCodeBlock::jettison):
        (JSC::CodeBlock::shouldOptimizeNow):
        (JSC::CodeBlock::tallyFrequentExitSites):
        (JSC::CodeBlock::dumpValueProfiles):
        * bytecode/CodeBlock.h:
        (JSC::CodeBlock::specializationKind):
        (CodeBlock):
        (JSC::CodeBlock::getJITType):
        * bytecode/CodeBlockHash.cpp: Added.
        (JSC):
        (JSC::CodeBlockHash::CodeBlockHash):
        (JSC::CodeBlockHash::dump):
        * bytecode/CodeBlockHash.h: Added.
        (JSC):
        (CodeBlockHash):
        (JSC::CodeBlockHash::CodeBlockHash):
        (JSC::CodeBlockHash::hash):
        (JSC::CodeBlockHash::operator==):
        (JSC::CodeBlockHash::operator!=):
        (JSC::CodeBlockHash::operator<):
        (JSC::CodeBlockHash::operator>):
        (JSC::CodeBlockHash::operator<=):
        (JSC::CodeBlockHash::operator>=):
        * bytecode/CodeBlockWithJITType.h: Added.
        (JSC):
        (CodeBlockWithJITType):
        (JSC::CodeBlockWithJITType::CodeBlockWithJITType):
        (JSC::CodeBlockWithJITType::dump):
        * bytecode/CodeOrigin.cpp: Added.
        (JSC):
        (JSC::CodeOrigin::inlineDepthForCallFrame):
        (JSC::CodeOrigin::inlineDepth):
        (JSC::CodeOrigin::inlineStack):
        (JSC::InlineCallFrame::hash):
        * bytecode/CodeOrigin.h:
        (InlineCallFrame):
        (JSC::InlineCallFrame::specializationKind):
        (JSC):
        * bytecode/CodeType.cpp: Added.
        (WTF):
        (WTF::printInternal):
        * bytecode/CodeType.h:
        (WTF):
        * bytecode/ExecutionCounter.cpp:
        (JSC::ExecutionCounter::dump):
        * bytecode/ExecutionCounter.h:
        (ExecutionCounter):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::parseCodeBlock):
        * dfg/DFGDisassembler.cpp:
        (JSC::DFG::Disassembler::dump):
        * dfg/DFGGraph.cpp:
        (JSC::DFG::Graph::dumpCodeOrigin):
        * dfg/DFGOSRExitCompiler.cpp:
        * dfg/DFGOperations.cpp:
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::generateProtoChainAccessStub):
        (JSC::DFG::tryCacheGetByID):
        (JSC::DFG::tryBuildGetByIDList):
        (JSC::DFG::emitPutReplaceStub):
        (JSC::DFG::emitPutTransitionStub):
        (JSC::DFG::dfgLinkClosureCall):
        * interpreter/Interpreter.cpp:
        (JSC::Interpreter::dumpCallFrame):
        * jit/JITCode.cpp: Added.
        (WTF):
        (WTF::printInternal):
        * jit/JITCode.h:
        (JSC::JITCode::jitType):
        (WTF):
        * jit/JITDisassembler.cpp:
        (JSC::JITDisassembler::dump):
        (JSC::JITDisassembler::dumpForInstructions):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::privateCompilePutByIdTransition):
        (JSC::JIT::privateCompilePatchGetArrayLength):
        (JSC::JIT::privateCompileGetByIdProto):
        (JSC::JIT::privateCompileGetByIdSelfList):
        (JSC::JIT::privateCompileGetByIdProtoList):
        (JSC::JIT::privateCompileGetByIdChainList):
        (JSC::JIT::privateCompileGetByIdChain):
        (JSC::JIT::privateCompileGetByVal):
        (JSC::JIT::privateCompilePutByVal):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::privateCompilePutByIdTransition):
        (JSC::JIT::privateCompilePatchGetArrayLength):
        (JSC::JIT::privateCompileGetByIdProto):
        (JSC::JIT::privateCompileGetByIdSelfList):
        (JSC::JIT::privateCompileGetByIdProtoList):
        (JSC::JIT::privateCompileGetByIdChainList):
        (JSC::JIT::privateCompileGetByIdChain):
        * jit/JITStubs.cpp:
        (JSC::DEFINE_STUB_FUNCTION):
        * runtime/CodeSpecializationKind.cpp: Added.
        (WTF):
        (WTF::printInternal):
        * runtime/CodeSpecializationKind.h:
        (JSC::specializationFromIsCall):
        (JSC):
        (JSC::specializationFromIsConstruct):
        (WTF):
        * runtime/Executable.cpp:
        (JSC::ExecutableBase::hashFor):
        (JSC):
        (JSC::NativeExecutable::hashFor):
        (JSC::ScriptExecutable::hashFor):
        * runtime/Executable.h:
        (ExecutableBase):
        (NativeExecutable):
        (ScriptExecutable):
        (JSC::ScriptExecutable::source):

2012-11-29  Michael Saboff  <msaboff@apple.com>

        Speculative Windows build fix after r136086.

        Unreviewed build fix.

        Suspect that ?setDumpsGeneratedCode@BytecodeGenerator@JSC@@SAX_N@Z needs to be removed from Windows
        export list since the symbol was removed in r136086.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:

2012-11-28  Filip Pizlo  <fpizlo@apple.com>

        SpeculatedType dumping should not use the static char buffer[thingy] idiom
        https://bugs.webkit.org/show_bug.cgi?id=103584

        Reviewed by Michael Saboff.

        Changed SpeculatedType to be "dumpable" by saying things like:
        
        dataLog("thingy = ", SpeculationDump(thingy))
        
        Removed the old stringification functions, and changed all code that referred to them
        to use the new dataLog()/print() style.

        * CMakeLists.txt:
        * GNUmakefile.list.am:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * Target.pri:
        * bytecode/SpeculatedType.cpp:
        (JSC::dumpSpeculation):
        (JSC::speculationToAbbreviatedString):
        (JSC::dumpSpeculationAbbreviated):
        * bytecode/SpeculatedType.h:
        * bytecode/ValueProfile.h:
        (JSC::ValueProfileBase::dump):
        * bytecode/VirtualRegister.h:
        (WTF::printInternal):
        * dfg/DFGAbstractValue.h:
        (JSC::DFG::AbstractValue::dump):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::injectLazyOperandSpeculation):
        (JSC::DFG::ByteCodeParser::getPredictionWithoutOSRExit):
        * dfg/DFGGraph.cpp:
        (JSC::DFG::Graph::dump):
        (JSC::DFG::Graph::predictArgumentTypes):
        * dfg/DFGGraph.h:
        (Graph):
        * dfg/DFGStructureAbstractValue.h:
        * dfg/DFGVariableAccessDataDump.cpp: Added.
        (JSC::DFG::VariableAccessDataDump::VariableAccessDataDump):
        (JSC::DFG::VariableAccessDataDump::dump):
        * dfg/DFGVariableAccessDataDump.h: Added.
        (VariableAccessDataDump):

2012-11-28  Michael Saboff  <msaboff@apple.com>

        Change Bytecompiler s_dumpsGeneratedCode to an Options value
        https://bugs.webkit.org/show_bug.cgi?id=103588

        Reviewed by Filip Pizlo.

        Moved the control of dumping bytecodes to Options::dumpGeneratedBytecodes.

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::CodeBlock):
        * bytecompiler/BytecodeGenerator.cpp:
        * bytecompiler/BytecodeGenerator.h:
        * jsc.cpp:
        (runWithScripts):
        * runtime/Options.h:

2012-11-28  Mark Hahnenberg  <mhahnenberg@apple.com>

        Copying phase should use work lists
        https://bugs.webkit.org/show_bug.cgi?id=101390

        Reviewed by Filip Pizlo.

        * JavaScriptCore.xcodeproj/project.pbxproj:
        * heap/BlockAllocator.cpp:
        (JSC::BlockAllocator::BlockAllocator):
        * heap/BlockAllocator.h: New RegionSet for CopyWorkListSegments.
        (BlockAllocator):
        (JSC::CopyWorkListSegment):
        * heap/CopiedBlock.h: Added a per-block CopyWorkList to keep track of the JSCells that need to be revisited during the copying
        phase to copy their backing stores.
        (CopiedBlock):
        (JSC::CopiedBlock::CopiedBlock): 
        (JSC::CopiedBlock::didSurviveGC):
        (JSC::CopiedBlock::didEvacuateBytes): There is now a one-to-one relationship between GCThreads and the CopiedBlocks they're 
        responsible for evacuating, we no longer need any of that fancy compare and swap stuff. 
        (JSC::CopiedBlock::pin):
        (JSC::CopiedBlock::hasWorkList): 
        (JSC::CopiedBlock::workList):
        * heap/CopiedBlockInlines.h: Added.
        (JSC::CopiedBlock::reportLiveBytes): Since we now have to grab a SpinLock to perform operations on the CopyWorkList during marking,
        we don't need to do any of that fancy compare and swap stuff we were doing for tracking live bytes.
        * heap/CopiedSpace.h:
        (CopiedSpace):
        * heap/CopiedSpaceInlines.h:
        (JSC::CopiedSpace::pin):
        * heap/CopyVisitor.cpp:
        (JSC::CopyVisitor::copyFromShared): We now iterate over a range of CopiedBlocks rather than MarkedBlocks and revisit the cells in those
        blocks' CopyWorkLists.
        * heap/CopyVisitor.h:
        (CopyVisitor):
        * heap/CopyVisitorInlines.h:
        (JSC::CopyVisitor::visitCell): The function responsible for calling the correct copyBackingStore() function for each JSCell from 
        a CopiedBlock's CopyWorkList.
        (JSC::CopyVisitor::didCopy): We no longer need to check if the block is empty here because we know exactly when we're done 
        evacuating a CopiedBlock, which is when we've gone through all of the CopiedBlock's CopyWorkList.
        * heap/CopyWorkList.h: Added.
        (CopyWorkListSegment): Individual chunk of a CopyWorkList that is allocated from the BlockAllocator.
        (JSC::CopyWorkListSegment::create):
        (JSC::CopyWorkListSegment::size):
        (JSC::CopyWorkListSegment::isFull):
        (JSC::CopyWorkListSegment::get):
        (JSC::CopyWorkListSegment::append):
        (JSC::CopyWorkListSegment::CopyWorkListSegment):
        (JSC::CopyWorkListSegment::data):
        (JSC::CopyWorkListSegment::endOfBlock):
        (CopyWorkListIterator): Responsible for giving CopyVisitors a contiguous notion of access across the separate CopyWorkListSegments
        that make up each CopyWorkList.
        (JSC::CopyWorkListIterator::get):
        (JSC::CopyWorkListIterator::operator*):
        (JSC::CopyWorkListIterator::operator->):
        (JSC::CopyWorkListIterator::operator++):
        (JSC::CopyWorkListIterator::operator==):
        (JSC::CopyWorkListIterator::operator!=):
        (JSC::CopyWorkListIterator::CopyWorkListIterator):
        (CopyWorkList): Data structure that keeps track of the JSCells that need copying in a particular CopiedBlock.
        (JSC::CopyWorkList::CopyWorkList):
        (JSC::CopyWorkList::~CopyWorkList):
        (JSC::CopyWorkList::append):
        (JSC::CopyWorkList::begin):
        (JSC::CopyWorkList::end):
        * heap/GCThreadSharedData.cpp:
        (JSC::GCThreadSharedData::GCThreadSharedData): We no longer use the m_blockSnapshot from the Heap during the copying phase.
        (JSC::GCThreadSharedData::didStartCopying): We now copy the set of all blocks in the CopiedSpace to a separate vector for 
        iterating over during the copying phase since the set stored in the CopiedSpace will change as blocks are evacuated and 
        recycled throughout the copying phase.
        * heap/GCThreadSharedData.h:
        (GCThreadSharedData): 
        * heap/Heap.h:
        (Heap):
        * heap/SlotVisitor.h: We now need to know the object who is being marked that has a backing store so that we can store it 
        in a CopyWorkList to revisit later during the copying phase.
        * heap/SlotVisitorInlines.h:
        (JSC::SlotVisitor::copyLater):
        * runtime/JSObject.cpp:
        (JSC::JSObject::visitButterfly):

2012-11-28  Filip Pizlo  <fpizlo@apple.com>

        Disassembly methods should be able to disassemble to any PrintStream& rather than always using WTF::dataFile()
        https://bugs.webkit.org/show_bug.cgi?id=103492

        Reviewed by Mark Hahnenberg.

        Switched disassembly code to use PrintStream&, and to use print() rather than printf().

        * dfg/DFGDisassembler.cpp:
        (JSC::DFG::Disassembler::dump):
        (DFG):
        (JSC::DFG::Disassembler::dumpDisassembly):
        * dfg/DFGDisassembler.h:
        (Disassembler):
        * dfg/DFGGraph.cpp:
        (JSC::DFG::printWhiteSpace):
        (JSC::DFG::Graph::dumpCodeOrigin):
        (JSC::DFG::Graph::printNodeWhiteSpace):
        (JSC::DFG::Graph::dump):
        (DFG):
        (JSC::DFG::Graph::dumpBlockHeader):
        * dfg/DFGGraph.h:
        (Graph):
        * jit/JITDisassembler.cpp:
        (JSC::JITDisassembler::dump):
        (JSC::JITDisassembler::dumpForInstructions):
        (JSC::JITDisassembler::dumpDisassembly):
        * jit/JITDisassembler.h:
        (JITDisassembler):

2012-11-28  Filip Pizlo  <fpizlo@apple.com>

        It should be possible to say dataLog("count = ", count, "\n") instead of dataLogF("count = %d\n", count)
        https://bugs.webkit.org/show_bug.cgi?id=103009

        Reviewed by Michael Saboff.

        Instead of converting all of JSC to use the new dataLog()/print() methods, I just changed
        one place: dumping of abstract values. This is mainly just to ensure that the code I
        added to WTF is actually doing things.

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::dump):
        * dfg/DFGAbstractValue.h:
        (JSC::DFG::AbstractValue::dump):
        (WTF):
        (WTF::printInternal):
        * dfg/DFGStructureAbstractValue.h:
        (JSC::DFG::StructureAbstractValue::dump):
        (WTF):
        (WTF::printInternal):

2012-11-28  Oliver Hunt  <oliver@apple.com>

        Make source cache include more information about the function extent.
        https://bugs.webkit.org/show_bug.cgi?id=103552

        Reviewed by Gavin Barraclough.

        Add a bit more information to the source cache.

        * parser/Parser.cpp:
        (JSC::::parseFunctionInfo):
           Store the function start offset
        * parser/SourceProviderCacheItem.h:
        (JSC::SourceProviderCacheItem::SourceProviderCacheItem):
        (SourceProviderCacheItem):
           Add additional field for the start of the real function string, and re-arrange
           fields to avoid growing the struct.

2012-11-27  Filip Pizlo  <fpizlo@apple.com>

        Convert some remaining uses of FILE* to PrintStream&.

        Rubber stamped by Mark Hahnenberg.

        * bytecode/ValueProfile.h:
        (JSC::ValueProfileBase::dump):
        * bytecode/ValueRecovery.h:
        (JSC::ValueRecovery::dump):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::parseCodeBlock):
        * dfg/DFGNode.h:
        (JSC::DFG::Node::dumpChildren):

2012-11-27  Filip Pizlo  <fpizlo@apple.com>

        Fix indentation in JSValue.h

        Rubber stamped by Mark Hahnenberg.

        * runtime/JSValue.h:

2012-11-26  Filip Pizlo  <fpizlo@apple.com>

        DFG SetLocal should use forwardSpeculationCheck instead of its own half-baked version of same
        https://bugs.webkit.org/show_bug.cgi?id=103353

        Reviewed by Oliver Hunt and Gavin Barraclough.

        Made it possible to use forward speculations for most of the operand classes. Changed the conditional
        direction parameter from being 'bool isForward' to an enum (SpeculationDirection). Changed SetLocal
        to use forward speculations and got rid of its half-baked version of same.
        
        Also added the ability to force the DFG's disassembler to dump all nodes, even ones that are dead.

        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::parseBlock):
        * dfg/DFGDisassembler.cpp:
        (JSC::DFG::Disassembler::dump):
        * dfg/DFGDriver.cpp:
        (JSC::DFG::compile):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::speculationCheck):
        (DFG):
        (JSC::DFG::SpeculativeJIT::convertLastOSRExitToForward):
        (JSC::DFG::SpeculativeJIT::speculationWatchpoint):
        (JSC::DFG::SpeculativeJIT::terminateSpeculativeExecution):
        (JSC::DFG::SpeculativeJIT::fillStorage):
        * dfg/DFGSpeculativeJIT.h:
        (SpeculativeJIT):
        (JSC::DFG::SpeculateIntegerOperand::SpeculateIntegerOperand):
        (JSC::DFG::SpeculateIntegerOperand::gpr):
        (SpeculateIntegerOperand):
        (JSC::DFG::SpeculateDoubleOperand::SpeculateDoubleOperand):
        (JSC::DFG::SpeculateDoubleOperand::fpr):
        (SpeculateDoubleOperand):
        (JSC::DFG::SpeculateCellOperand::SpeculateCellOperand):
        (JSC::DFG::SpeculateCellOperand::gpr):
        (SpeculateCellOperand):
        (JSC::DFG::SpeculateBooleanOperand::SpeculateBooleanOperand):
        (JSC::DFG::SpeculateBooleanOperand::gpr):
        (SpeculateBooleanOperand):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::fillSpeculateIntInternal):
        (JSC::DFG::SpeculativeJIT::fillSpeculateInt):
        (JSC::DFG::SpeculativeJIT::fillSpeculateIntStrict):
        (JSC::DFG::SpeculativeJIT::fillSpeculateDouble):
        (JSC::DFG::SpeculativeJIT::fillSpeculateCell):
        (JSC::DFG::SpeculativeJIT::fillSpeculateBoolean):
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::fillSpeculateIntInternal):
        (JSC::DFG::SpeculativeJIT::fillSpeculateInt):
        (JSC::DFG::SpeculativeJIT::fillSpeculateIntStrict):
        (JSC::DFG::SpeculativeJIT::fillSpeculateDouble):
        (JSC::DFG::SpeculativeJIT::fillSpeculateCell):
        (JSC::DFG::SpeculativeJIT::fillSpeculateBoolean):
        (JSC::DFG::SpeculativeJIT::compile):
        * runtime/Options.h:
        (JSC):

2012-11-26  Daniel Bates  <dbates@webkit.org>

        Substitute "allSeparators8Bit" for "allSeperators8Bit" in JSC::jsSpliceSubstringsWithSeparators()
        <https://bugs.webkit.org/show_bug.cgi?id=103303>

        Reviewed by Simon Fraser.

        Fix misspelled word, "Seperators" [sic], in a local variable name in JSC::jsSpliceSubstringsWithSeparators().

        * runtime/StringPrototype.cpp:
        (JSC::jsSpliceSubstringsWithSeparators):

2012-11-26  Daniel Bates  <dbates@webkit.org>

        JavaScript fails to handle String.replace() with large replacement string
        https://bugs.webkit.org/show_bug.cgi?id=102956
        <rdar://problem/12738012>

        Reviewed by Oliver Hunt.

        Fix an issue where we didn't check for overflow when computing the length
        of the result of String.replace() with a large replacement string.

        * runtime/StringPrototype.cpp:
        (JSC::jsSpliceSubstringsWithSeparators):

2012-11-26  Zeno Albisser  <zeno@webkit.org>

        [Qt] Fix the LLInt build on Mac
        https://bugs.webkit.org/show_bug.cgi?id=97587

        Reviewed by Simon Hausmann.

        * DerivedSources.pri:
        * JavaScriptCore.pro:

2012-11-26  Oliver Hunt  <oliver@apple.com>

        32-bit build fix.  Move the method decalration outside of the X86_64 only section.

        * assembler/MacroAssembler.h:
        (MacroAssembler):
        (JSC::MacroAssembler::shouldConsiderBlinding):

2012-11-26  Oliver Hunt  <oliver@apple.com>

        Don't blind all the things.
        https://bugs.webkit.org/show_bug.cgi?id=102572

        Reviewed by Gavin Barraclough.

        No longer blind all the constants in the instruction stream.  We use a
        simple non-deterministic filter to avoid blinding everything.  Also modified
        the basic integer blinding logic to avoid blinding small negative values.

        * assembler/MacroAssembler.h:
        (MacroAssembler):
        (JSC::MacroAssembler::shouldConsiderBlinding):
        (JSC::MacroAssembler::shouldBlind):

2012-11-26  Mark Hahnenberg  <mhahnenberg@apple.com>

        JSObject::copyButterfly doesn't handle undecided indexing types correctly
        https://bugs.webkit.org/show_bug.cgi?id=102573

        Reviewed by Filip Pizlo.

        We don't do any copying into the newly allocated vector and we don't zero-initialize CopiedBlocks 
        during the copying phase, so we end up with uninitialized memory in arrays which have undecided indexing 
        types. We should just do the actual memcpy from the old block to the new one. 

        * runtime/JSObject.cpp:
        (JSC::JSObject::copyButterfly): Just do the same thing that we do for other contiguous indexing types.

2012-11-26  Julien BRIANCEAU   <jbrianceau@nds.com>

        [sh4] JavaScriptCore JIT build is broken since r135330
        Add missing implementation for sh4 arch.
        https://bugs.webkit.org/show_bug.cgi?id=103145

        Reviewed by Oliver Hunt.

        * assembler/MacroAssemblerSH4.h:
        (JSC::MacroAssemblerSH4::canJumpReplacePatchableBranchPtrWithPatch):
        (MacroAssemblerSH4):
        (JSC::MacroAssemblerSH4::startOfBranchPtrWithPatchOnRegister):
        (JSC::MacroAssemblerSH4::revertJumpReplacementToBranchPtrWithPatch):
        (JSC::MacroAssemblerSH4::startOfPatchableBranchPtrWithPatchOnAddress):
        (JSC::MacroAssemblerSH4::revertJumpReplacementToPatchableBranchPtrWithPatch):
        * assembler/SH4Assembler.h:
        (JSC::SH4Assembler::revertJump):
        (SH4Assembler):
        (JSC::SH4Assembler::printInstr):

2012-11-26  Yuqiang Xian  <yuqiang.xian@intel.com>

        Use load64 instead of loadPtr to load a JSValue on JSVALUE64 platforms
        https://bugs.webkit.org/show_bug.cgi?id=100909

        Reviewed by Brent Fulgham.

        This is a (trivial) fix after r132701.

        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):

2012-11-26  Gabor Ballabas  <gaborb@inf.u-szeged.hu>

        [Qt][ARM] REGRESSION(r130826): It made 33 JSC test and 466 layout tests crash
        https://bugs.webkit.org/show_bug.cgi?id=98857

        Reviewed by Zoltan Herczeg.

        Implement a new version of patchableBranch32 to fix crashing JSC
        tests.

        * assembler/MacroAssembler.h:
        (MacroAssembler):
        * assembler/MacroAssemblerARM.h:
        (JSC::MacroAssemblerARM::patchableBranch32):
        (MacroAssemblerARM):

2012-11-21  Filip Pizlo  <fpizlo@apple.com>

        Any function that can log things should be able to easily log them to a memory buffer as well
        https://bugs.webkit.org/show_bug.cgi?id=103000

        Reviewed by Sam Weinig.

        Change all users of WTF::dataFile() to expect a PrintStream& rather than a FILE*.

        * bytecode/Operands.h:
        (JSC::OperandValueTraits::dump):
        (JSC::dumpOperands):
        (JSC):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::dump):
        * dfg/DFGAbstractState.h:
        (AbstractState):
        * dfg/DFGAbstractValue.h:
        (JSC::DFG::AbstractValue::dump):
        * dfg/DFGCommon.h:
        (JSC::DFG::NodeIndexTraits::dump):
        * dfg/DFGStructureAbstractValue.h:
        (JSC::DFG::StructureAbstractValue::dump):
        * dfg/DFGVariableEvent.cpp:
        (JSC::DFG::VariableEvent::dump):
        (JSC::DFG::VariableEvent::dumpFillInfo):
        (JSC::DFG::VariableEvent::dumpSpillInfo):
        * dfg/DFGVariableEvent.h:
        (VariableEvent):
        * disassembler/Disassembler.h:
        (JSC):
        (JSC::tryToDisassemble):
        * disassembler/UDis86Disassembler.cpp:
        (JSC::tryToDisassemble):

2012-11-23  Alexis Menard  <alexis@webkit.org>

        [CSS3 Backgrounds and Borders] Implement new CSS3 background-position parsing.
        https://bugs.webkit.org/show_bug.cgi?id=102104

        Reviewed by Julien Chaffraix.

        Protect the new feature behind a feature flag.

        * Configurations/FeatureDefines.xcconfig:

2012-11-23  Gabor Ballabas  <gaborb@inf.u-szeged.hu>

        Fix the ARM traditional build after r135330
        https://bugs.webkit.org/show_bug.cgi?id=102871

        Reviewed by Zoltan Herczeg.

        Added missing functionality to traditional ARM architecture.

        * assembler/ARMAssembler.h:
        (JSC::ARMAssembler::revertJump):
        (ARMAssembler):
        * assembler/MacroAssemblerARM.h:
        (JSC::MacroAssemblerARM::startOfPatchableBranchPtrWithPatchOnAddress):
        (JSC::MacroAssemblerARM::startOfBranchPtrWithPatchOnRegister):
        (MacroAssemblerARM):
        (JSC::MacroAssemblerARM::revertJumpReplacementToBranchPtrWithPatch):

2012-11-16  Yury Semikhatsky  <yurys@chromium.org>

        Memory instrumentation: extract MemoryObjectInfo declaration into a separate file
        https://bugs.webkit.org/show_bug.cgi?id=102510

        Reviewed by Pavel Feldman.

        Added new symbols for the methods that have moved into .../wtf/MemoryInstrumentation.cpp

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:

2012-11-23  Julien BRIANCEAU   <jbrianceau@nds.com>

        [sh4] JavaScriptCore JIT build is broken since r130839
        Add missing implementation for sh4 arch.
        https://bugs.webkit.org/show_bug.cgi?id=101479

        Reviewed by Filip Pizlo.

        * assembler/MacroAssemblerSH4.h:
        (JSC::MacroAssemblerSH4::load8Signed):
        (MacroAssemblerSH4):
        (JSC::MacroAssemblerSH4::load16Signed):
        (JSC::MacroAssemblerSH4::store8):
        (JSC::MacroAssemblerSH4::store16):
        (JSC::MacroAssemblerSH4::moveDoubleToInts):
        (JSC::MacroAssemblerSH4::moveIntsToDouble):
        (JSC::MacroAssemblerSH4::loadFloat):
        (JSC::MacroAssemblerSH4::loadDouble):
        (JSC::MacroAssemblerSH4::storeFloat):
        (JSC::MacroAssemblerSH4::storeDouble):
        (JSC::MacroAssemblerSH4::addDouble):
        (JSC::MacroAssemblerSH4::convertFloatToDouble):
        (JSC::MacroAssemblerSH4::convertDoubleToFloat):
        (JSC::MacroAssemblerSH4::urshift32):
        * assembler/SH4Assembler.h:
        (JSC::SH4Assembler::sublRegReg):
        (JSC::SH4Assembler::subvlRegReg):
        (JSC::SH4Assembler::floatfpulfrn):
        (JSC::SH4Assembler::fldsfpul):
        (JSC::SH4Assembler::fstsfpul):
        (JSC::SH4Assembler::dcnvsd):
        (SH4Assembler):
        (JSC::SH4Assembler::movbRegMem):
        (JSC::SH4Assembler::sizeOfConstantPool):
        (JSC::SH4Assembler::linkJump):
        (JSC::SH4Assembler::printInstr):
        (JSC::SH4Assembler::printBlockInstr):

2012-11-22  Balazs Kilvady  <kilvadyb@homejinni.com>

        Fix the MIPS build after r135330
        https://bugs.webkit.org/show_bug.cgi?id=102872

        Reviewed by Gavin Barraclough.

        Revert/replace functions added to MIPS port.

        * assembler/MIPSAssembler.h:
        (JSC::MIPSAssembler::revertJumpToMove):
        (MIPSAssembler):
        (JSC::MIPSAssembler::replaceWithJump):
        * assembler/MacroAssemblerMIPS.h:
        (MacroAssemblerMIPS):
        (JSC::MacroAssemblerMIPS::startOfBranchPtrWithPatchOnRegister):
        (JSC::MacroAssemblerMIPS::revertJumpReplacementToBranchPtrWithPatch):
        (JSC::MacroAssemblerMIPS::startOfPatchableBranchPtrWithPatchOnAddress):

2012-11-21  Filip Pizlo  <fpizlo@apple.com>

        Rename dataLog() and dataLogV() to dataLogF() and dataLogFV()
        https://bugs.webkit.org/show_bug.cgi?id=103001

        Rubber stamped by Dan Bernstein.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
        * assembler/LinkBuffer.cpp:
        (JSC::LinkBuffer::finalizeCodeWithDisassembly):
        (JSC::LinkBuffer::dumpLinkStatistics):
        (JSC::LinkBuffer::dumpCode):
        * assembler/LinkBuffer.h:
        (JSC):
        * assembler/SH4Assembler.h:
        (JSC::SH4Assembler::vprintfStdoutInstr):
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::dumpBytecodeCommentAndNewLine):
        (JSC::CodeBlock::printUnaryOp):
        (JSC::CodeBlock::printBinaryOp):
        (JSC::CodeBlock::printConditionalJump):
        (JSC::CodeBlock::printGetByIdOp):
        (JSC::dumpStructure):
        (JSC::dumpChain):
        (JSC::CodeBlock::printGetByIdCacheStatus):
        (JSC::CodeBlock::printCallOp):
        (JSC::CodeBlock::printPutByIdOp):
        (JSC::CodeBlock::printStructure):
        (JSC::CodeBlock::printStructures):
        (JSC::CodeBlock::dump):
        (JSC::CodeBlock::dumpStatistics):
        (JSC::CodeBlock::finalizeUnconditionally):
        (JSC::CodeBlock::resetStubInternal):
        (JSC::CodeBlock::reoptimize):
        (JSC::ProgramCodeBlock::jettison):
        (JSC::EvalCodeBlock::jettison):
        (JSC::FunctionCodeBlock::jettison):
        (JSC::CodeBlock::shouldOptimizeNow):
        (JSC::CodeBlock::tallyFrequentExitSites):
        (JSC::CodeBlock::dumpValueProfiles):
        * bytecode/Opcode.cpp:
        (JSC::OpcodeStats::~OpcodeStats):
        * bytecode/SamplingTool.cpp:
        (JSC::SamplingFlags::stop):
        (JSC::SamplingRegion::dumpInternal):
        (JSC::SamplingTool::dump):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::initialize):
        (JSC::DFG::AbstractState::endBasicBlock):
        (JSC::DFG::AbstractState::mergeStateAtTail):
        (JSC::DFG::AbstractState::mergeToSuccessors):
        * dfg/DFGAbstractValue.h:
        (JSC::DFG::AbstractValue::dump):
        * dfg/DFGArgumentsSimplificationPhase.cpp:
        (JSC::DFG::ArgumentsSimplificationPhase::run):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::injectLazyOperandSpeculation):
        (JSC::DFG::ByteCodeParser::getPredictionWithoutOSRExit):
        (JSC::DFG::ByteCodeParser::getArrayModeAndEmitChecks):
        (JSC::DFG::ByteCodeParser::makeSafe):
        (JSC::DFG::ByteCodeParser::makeDivSafe):
        (JSC::DFG::ByteCodeParser::handleCall):
        (JSC::DFG::ByteCodeParser::handleInlining):
        (JSC::DFG::ByteCodeParser::parseBlock):
        (JSC::DFG::ByteCodeParser::processPhiStack):
        (JSC::DFG::ByteCodeParser::linkBlock):
        (JSC::DFG::ByteCodeParser::InlineStackEntry::InlineStackEntry):
        (JSC::DFG::ByteCodeParser::parseCodeBlock):
        (JSC::DFG::ByteCodeParser::parse):
        * dfg/DFGCFAPhase.cpp:
        (JSC::DFG::CFAPhase::performBlockCFA):
        (JSC::DFG::CFAPhase::performForwardCFA):
        * dfg/DFGCFGSimplificationPhase.cpp:
        (JSC::DFG::CFGSimplificationPhase::run):
        (JSC::DFG::CFGSimplificationPhase::fixPossibleGetLocal):
        (JSC::DFG::CFGSimplificationPhase::fixPhis):
        (JSC::DFG::CFGSimplificationPhase::fixJettisonedPredecessors):
        (JSC::DFG::CFGSimplificationPhase::removePotentiallyDeadPhiReference):
        (JSC::DFG::CFGSimplificationPhase::mergeBlocks):
        * dfg/DFGCSEPhase.cpp:
        (JSC::DFG::CSEPhase::endIndexForPureCSE):
        (JSC::DFG::CSEPhase::setReplacement):
        (JSC::DFG::CSEPhase::eliminate):
        (JSC::DFG::CSEPhase::performNodeCSE):
        * dfg/DFGCapabilities.cpp:
        (JSC::DFG::debugFail):
        * dfg/DFGConstantFoldingPhase.cpp:
        (JSC::DFG::ConstantFoldingPhase::foldConstants):
        (JSC::DFG::ConstantFoldingPhase::paintUnreachableCode):
        * dfg/DFGDisassembler.cpp:
        (JSC::DFG::Disassembler::dump):
        * dfg/DFGDriver.cpp:
        (JSC::DFG::compile):
        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::fixupNode):
        (JSC::DFG::FixupPhase::fixDoubleEdge):
        * dfg/DFGGraph.cpp:
        (JSC::DFG::printWhiteSpace):
        (JSC::DFG::Graph::dumpCodeOrigin):
        (JSC::DFG::Graph::dump):
        (JSC::DFG::Graph::dumpBlockHeader):
        (JSC::DFG::Graph::predictArgumentTypes):
        * dfg/DFGJITCompiler.cpp:
        (JSC::DFG::JITCompiler::link):
        * dfg/DFGOSREntry.cpp:
        (JSC::DFG::prepareOSREntry):
        * dfg/DFGOSRExitCompiler.cpp:
        * dfg/DFGOSRExitCompiler32_64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOperations.cpp:
        * dfg/DFGPhase.cpp:
        (JSC::DFG::Phase::beginPhase):
        * dfg/DFGPhase.h:
        (JSC::DFG::runAndLog):
        * dfg/DFGPredictionPropagationPhase.cpp:
        (JSC::DFG::PredictionPropagationPhase::propagate):
        (JSC::DFG::PredictionPropagationPhase::propagateForward):
        (JSC::DFG::PredictionPropagationPhase::propagateBackward):
        (JSC::DFG::PredictionPropagationPhase::doRoundOfDoubleVoting):
        * dfg/DFGRegisterBank.h:
        (JSC::DFG::RegisterBank::dump):
        * dfg/DFGScoreBoard.h:
        (JSC::DFG::ScoreBoard::use):
        (JSC::DFG::ScoreBoard::dump):
        * dfg/DFGSlowPathGenerator.h:
        (JSC::DFG::SlowPathGenerator::generate):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::terminateSpeculativeExecution):
        (JSC::DFG::SpeculativeJIT::terminateSpeculativeExecutionWithConditionalDirection):
        (JSC::DFG::SpeculativeJIT::runSlowPathGenerators):
        (JSC::DFG::SpeculativeJIT::dump):
        (JSC::DFG::SpeculativeJIT::checkConsistency):
        (JSC::DFG::SpeculativeJIT::compile):
        (JSC::DFG::SpeculativeJIT::checkGeneratedTypeForToInt32):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::fillSpeculateIntInternal):
        (JSC::DFG::SpeculativeJIT::fillSpeculateDouble):
        (JSC::DFG::SpeculativeJIT::fillSpeculateCell):
        (JSC::DFG::SpeculativeJIT::fillSpeculateBoolean):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::fillSpeculateIntInternal):
        (JSC::DFG::SpeculativeJIT::fillSpeculateDouble):
        (JSC::DFG::SpeculativeJIT::fillSpeculateCell):
        (JSC::DFG::SpeculativeJIT::fillSpeculateBoolean):
        * dfg/DFGStructureCheckHoistingPhase.cpp:
        (JSC::DFG::StructureCheckHoistingPhase::run):
        * dfg/DFGValidate.cpp:
        (Validate):
        (JSC::DFG::Validate::reportValidationContext):
        (JSC::DFG::Validate::dumpData):
        (JSC::DFG::Validate::dumpGraphIfAppropriate):
        * dfg/DFGVariableEventStream.cpp:
        (JSC::DFG::VariableEventStream::logEvent):
        (JSC::DFG::VariableEventStream::reconstruct):
        * dfg/DFGVirtualRegisterAllocationPhase.cpp:
        (JSC::DFG::VirtualRegisterAllocationPhase::run):
        * heap/Heap.cpp:
        * heap/HeapStatistics.cpp:
        (JSC::HeapStatistics::logStatistics):
        (JSC::HeapStatistics::showObjectStatistics):
        * heap/MarkStack.h:
        * heap/MarkedBlock.h:
        * heap/SlotVisitor.cpp:
        (JSC::SlotVisitor::validate):
        * interpreter/CallFrame.cpp:
        (JSC::CallFrame::dumpCaller):
        * interpreter/Interpreter.cpp:
        (JSC::Interpreter::dumpRegisters):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompileMainPass):
        (JSC::JIT::privateCompileSlowCases):
        (JSC::JIT::privateCompile):
        * jit/JITDisassembler.cpp:
        (JSC::JITDisassembler::dump):
        (JSC::JITDisassembler::dumpForInstructions):
        * jit/JITStubRoutine.h:
        (JSC):
        * jit/JITStubs.cpp:
        (JSC::DEFINE_STUB_FUNCTION):
        * jit/JumpReplacementWatchpoint.cpp:
        (JSC::JumpReplacementWatchpoint::fireInternal):
        * llint/LLIntExceptions.cpp:
        (JSC::LLInt::interpreterThrowInCaller):
        (JSC::LLInt::returnToThrow):
        (JSC::LLInt::callToThrow):
        * llint/LLIntSlowPaths.cpp:
        (JSC::LLInt::llint_trace_operand):
        (JSC::LLInt::llint_trace_value):
        (JSC::LLInt::LLINT_SLOW_PATH_DECL):
        (JSC::LLInt::traceFunctionPrologue):
        (JSC::LLInt::jitCompileAndSetHeuristics):
        (JSC::LLInt::entryOSR):
        (JSC::LLInt::handleHostCall):
        (JSC::LLInt::setUpCall):
        * profiler/Profile.cpp:
        (JSC::Profile::debugPrintData):
        (JSC::Profile::debugPrintDataSampleStyle):
        * profiler/ProfileNode.cpp:
        (JSC::ProfileNode::debugPrintData):
        (JSC::ProfileNode::debugPrintDataSampleStyle):
        * runtime/JSGlobalData.cpp:
        (JSC::JSGlobalData::dumpRegExpTrace):
        * runtime/RegExp.cpp:
        (JSC::RegExp::matchCompareWithInterpreter):
        * runtime/SamplingCounter.cpp:
        (JSC::AbstractSamplingCounter::dump):
        * runtime/Structure.cpp:
        (JSC::Structure::dumpStatistics):
        (JSC::PropertyMapStatisticsExitLogger::~PropertyMapStatisticsExitLogger):
        * tools/CodeProfile.cpp:
        (JSC::CodeProfile::report):
        * tools/ProfileTreeNode.h:
        (JSC::ProfileTreeNode::dumpInternal):
        * yarr/YarrInterpreter.cpp:
        (JSC::Yarr::ByteCompiler::dumpDisjunction):

2012-11-21  Filip Pizlo  <fpizlo@apple.com>

        It should be possible to say disassemble(stuff) instead of having to say if (!tryToDisassemble(stuff)) dataLog("I failed")
        https://bugs.webkit.org/show_bug.cgi?id=103010

        Reviewed by Anders Carlsson.

        You can still say tryToDisassemble(), which will tell you if it failed; you can then
        decide what to do instead. But it's better to say disassemble(), which will just print
        the instruction ranges if tryToDisassemble() failed. This is particularly appropriate
        since that's what all previous users of tryToDisassemble() would have done in some
        form or another.

        * CMakeLists.txt:
        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * Target.pri:
        * assembler/LinkBuffer.cpp:
        (JSC::LinkBuffer::finalizeCodeWithDisassembly):
        * dfg/DFGDisassembler.cpp:
        (JSC::DFG::Disassembler::dumpDisassembly):
        * disassembler/Disassembler.cpp: Added.
        (JSC):
        (JSC::disassemble):
        * disassembler/Disassembler.h:
        (JSC):
        * jit/JITDisassembler.cpp:
        (JSC::JITDisassembler::dumpDisassembly):

2012-11-21  Filip Pizlo  <fpizlo@apple.com>

        dumpOperands() claims that it needs a non-const Operands& when that is completely false
        https://bugs.webkit.org/show_bug.cgi?id=103005

        Reviewed by Eric Carlson.

        * bytecode/Operands.h:
        (JSC::dumpOperands):
        (JSC):

2012-11-20  Filip Pizlo  <fpizlo@apple.com>

        Baseline JIT's disassembly should be just as pretty as the DFG's
        https://bugs.webkit.org/show_bug.cgi?id=102873

        Reviewed by Sam Weinig.

        Integrated the CodeBlock's bytecode dumper with the JIT's disassembler. Also fixed
        some type goof-ups (instructions are not in a Vector<Instruction> so using a Vector
        iterator makes no sense) and stream-lined some things (you don't actually need a
        full-fledged ExecState* to dump bytecode).

        * CMakeLists.txt:
        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * Target.pri:
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::printUnaryOp):
        (JSC::CodeBlock::printBinaryOp):
        (JSC::CodeBlock::printConditionalJump):
        (JSC::CodeBlock::printGetByIdOp):
        (JSC::CodeBlock::printCallOp):
        (JSC::CodeBlock::printPutByIdOp):
        (JSC::CodeBlock::dump):
        (JSC):
        (JSC::CodeBlock::CodeBlock):
        * bytecode/CodeBlock.h:
        (CodeBlock):
        * interpreter/Interpreter.cpp:
        (JSC::Interpreter::dumpCallFrame):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompileMainPass):
        (JSC::JIT::privateCompileSlowCases):
        (JSC::JIT::privateCompile):
        * jit/JIT.h:
        (JIT):
        * jit/JITDisassembler.cpp: Added.
        (JSC):
        (JSC::JITDisassembler::JITDisassembler):
        (JSC::JITDisassembler::~JITDisassembler):
        (JSC::JITDisassembler::dump):
        (JSC::JITDisassembler::dumpForInstructions):
        (JSC::JITDisassembler::dumpDisassembly):
        * jit/JITDisassembler.h: Added.
        (JSC):
        (JITDisassembler):
        (JSC::JITDisassembler::setStartOfCode):
        (JSC::JITDisassembler::setForBytecodeMainPath):
        (JSC::JITDisassembler::setForBytecodeSlowPath):
        (JSC::JITDisassembler::setEndOfSlowPath):
        (JSC::JITDisassembler::setEndOfCode):

2012-11-21  Daniel Bates  <dbates@webkit.org>

        JavaScript fails to concatenate large strings
        <https://bugs.webkit.org/show_bug.cgi?id=102963>

        Reviewed by Michael Saboff.

        Fixes an issue where we inadvertently didn't check the length of
        a JavaScript string for overflow.

        * runtime/Operations.h:
        (JSC::jsString):
        (JSC::jsStringFromArguments):

2012-11-20  Filip Pizlo  <fpizlo@apple.com>

        DFG should be able to cache closure calls (part 2/2)
        https://bugs.webkit.org/show_bug.cgi?id=102662

        Reviewed by Gavin Barraclough.

        Added caching of calls where the JSFunction* varies, but the Structure* and ExecutableBase*
        stay the same. This is accomplished by replacing the branch that compares against a constant
        JSFunction* with a jump to a closure call stub. The closure call stub contains a fast path,
        and jumps slow directly to the virtual call thunk.

        Looks like a 1% win on V8v7.

        * CMakeLists.txt:
        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * Target.pri:
        * bytecode/CallLinkInfo.cpp:
        (JSC::CallLinkInfo::unlink):
        * bytecode/CallLinkInfo.h:
        (CallLinkInfo):
        (JSC::CallLinkInfo::isLinked):
        (JSC::getCallLinkInfoBytecodeIndex):
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::finalizeUnconditionally):
        (JSC):
        (JSC::CodeBlock::findClosureCallForReturnPC):
        (JSC::CodeBlock::bytecodeOffset):
        (JSC::CodeBlock::codeOriginForReturn):
        * bytecode/CodeBlock.h:
        (JSC::CodeBlock::getCallLinkInfo):
        (CodeBlock):
        (JSC::CodeBlock::isIncomingCallAlreadyLinked):
        * dfg/DFGJITCompiler.cpp:
        (JSC::DFG::JITCompiler::link):
        * dfg/DFGJITCompiler.h:
        (JSC::DFG::JITCompiler::addJSCall):
        (JSC::DFG::JITCompiler::JSCallRecord::JSCallRecord):
        (JSCallRecord):
        * dfg/DFGOperations.cpp:
        * dfg/DFGOperations.h:
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::linkSlowFor):
        (DFG):
        (JSC::DFG::dfgLinkFor):
        (JSC::DFG::dfgLinkSlowFor):
        (JSC::DFG::dfgLinkClosureCall):
        * dfg/DFGRepatch.h:
        (DFG):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::emitCall):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::emitCall):
        * dfg/DFGThunks.cpp:
        (DFG):
        (JSC::DFG::linkClosureCallThunkGenerator):
        * dfg/DFGThunks.h:
        (DFG):
        * heap/Heap.h:
        (Heap):
        (JSC::Heap::jitStubRoutines):
        * heap/JITStubRoutineSet.h:
        (JSC::JITStubRoutineSet::size):
        (JSC::JITStubRoutineSet::at):
        (JITStubRoutineSet):
        * jit/ClosureCallStubRoutine.cpp: Added.
        (JSC):
        (JSC::ClosureCallStubRoutine::ClosureCallStubRoutine):
        (JSC::ClosureCallStubRoutine::~ClosureCallStubRoutine):
        (JSC::ClosureCallStubRoutine::markRequiredObjectsInternal):
        * jit/ClosureCallStubRoutine.h: Added.
        (JSC):
        (ClosureCallStubRoutine):
        (JSC::ClosureCallStubRoutine::structure):
        (JSC::ClosureCallStubRoutine::executable):
        (JSC::ClosureCallStubRoutine::codeOrigin):
        * jit/GCAwareJITStubRoutine.cpp:
        (JSC::GCAwareJITStubRoutine::GCAwareJITStubRoutine):
        * jit/GCAwareJITStubRoutine.h:
        (GCAwareJITStubRoutine):
        (JSC::GCAwareJITStubRoutine::isClosureCall):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompile):

2012-11-20  Filip Pizlo  <fpizlo@apple.com>

        DFG should be able to cache closure calls (part 1/2)
        https://bugs.webkit.org/show_bug.cgi?id=102662

        Reviewed by Gavin Barraclough.

        Add ability to revert a jump replacement back to
        branchPtrWithPatch(Condition, RegisterID, TrustedImmPtr). This is meant to be
        a mandatory piece of functionality for all assemblers. I also renamed some of
        the functions for reverting jump replacements back to
        patchableBranchPtrWithPatch(Condition, Address, TrustedImmPtr), so as to avoid
        confusion.

        * assembler/ARMv7Assembler.h:
        (JSC::ARMv7Assembler::BadReg):
        (ARMv7Assembler):
        (JSC::ARMv7Assembler::revertJumpTo_movT3):
        * assembler/LinkBuffer.h:
        (JSC):
        * assembler/MacroAssemblerARMv7.h:
        (JSC::MacroAssemblerARMv7::startOfBranchPtrWithPatchOnRegister):
        (MacroAssemblerARMv7):
        (JSC::MacroAssemblerARMv7::revertJumpReplacementToBranchPtrWithPatch):
        (JSC::MacroAssemblerARMv7::startOfPatchableBranchPtrWithPatchOnAddress):
        * assembler/MacroAssemblerX86.h:
        (JSC::MacroAssemblerX86::startOfBranchPtrWithPatchOnRegister):
        (MacroAssemblerX86):
        (JSC::MacroAssemblerX86::startOfPatchableBranchPtrWithPatchOnAddress):
        (JSC::MacroAssemblerX86::revertJumpReplacementToBranchPtrWithPatch):
        * assembler/MacroAssemblerX86_64.h:
        (JSC::MacroAssemblerX86_64::startOfBranchPtrWithPatchOnRegister):
        (JSC::MacroAssemblerX86_64::startOfPatchableBranchPtrWithPatchOnAddress):
        (MacroAssemblerX86_64):
        (JSC::MacroAssemblerX86_64::revertJumpReplacementToBranchPtrWithPatch):
        * assembler/RepatchBuffer.h:
        (JSC::RepatchBuffer::startOfBranchPtrWithPatchOnRegister):
        (RepatchBuffer):
        (JSC::RepatchBuffer::startOfPatchableBranchPtrWithPatchOnAddress):
        (JSC::RepatchBuffer::revertJumpReplacementToBranchPtrWithPatch):
        * assembler/X86Assembler.h:
        (JSC::X86Assembler::revertJumpTo_cmpl_ir_force32):
        (X86Assembler):
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::replaceWithJump):
        (JSC::DFG::dfgResetGetByID):
        (JSC::DFG::dfgResetPutByID):

2012-11-20  Yong Li  <yoli@rim.com>

        [ARMv7] Neither linkCall() nor linkPointer() should flush code.
        https://bugs.webkit.org/show_bug.cgi?id=99213

        Reviewed by George Staikos.

        LinkBuffer doesn't need to flush code during linking. It will
        eventually flush the whole executable. Fixing this gives >%5
        sunspider boost (on QNX).

        Also make replaceWithLoad() and replaceWithAddressComputation() flush
        only when necessary.

        * assembler/ARMv7Assembler.h:
        (JSC::ARMv7Assembler::linkCall):
        (JSC::ARMv7Assembler::linkPointer):
        (JSC::ARMv7Assembler::relinkCall):
        (JSC::ARMv7Assembler::repatchInt32):
        (JSC::ARMv7Assembler::repatchPointer):
        (JSC::ARMv7Assembler::replaceWithLoad): Flush only after it did write.
        (JSC::ARMv7Assembler::replaceWithAddressComputation): Flush only after it did write.
        (JSC::ARMv7Assembler::setInt32):
        (JSC::ARMv7Assembler::setPointer):

2012-11-19  Filip Pizlo  <fpizlo@apple.com>

        Remove support for ARMv7 errata from the jump code
        https://bugs.webkit.org/show_bug.cgi?id=102759

        Reviewed by Oliver Hunt.

        The jump replacement code was wrong to begin with since it wasn't doing
        a cache flush on the inserted padding. And, to my knowledge, we don't need
        this anymore, so this patch removes all errata code from the ARMv7 port.

        * assembler/ARMv7Assembler.h:
        (JSC::ARMv7Assembler::computeJumpType):
        (JSC::ARMv7Assembler::replaceWithJump):
        (JSC::ARMv7Assembler::maxJumpReplacementSize):
        (JSC::ARMv7Assembler::canBeJumpT3):
        (JSC::ARMv7Assembler::canBeJumpT4):

2012-11-19  Patrick Gansterer  <paroga@webkit.org>

        [CMake] Create JavaScriptCore ForwardingHeaders
        https://bugs.webkit.org/show_bug.cgi?id=92665

        Reviewed by Brent Fulgham.

        When using CMake to build the Windows port, we need
        to generate the forwarding headers with it too.

        * CMakeLists.txt:

2012-11-19  Kihong Kwon  <kihong.kwon@samsung.com>

        Add PROXIMITY_EVENTS feature
        https://bugs.webkit.org/show_bug.cgi?id=102658

        Reviewed by Kentaro Hara.

        Add PROXIMITY_EVENTS feature to xcode project for JavaScriptCore.

        * Configurations/FeatureDefines.xcconfig:

2012-11-18  Dan Bernstein  <mitz@apple.com>

        Try to fix the DFG build after r135099.

        * dfg/DFGCommon.h:
        (JSC::DFG::shouldShowDisassembly):

2012-11-18  Filip Pizlo  <fpizlo@apple.com>

        Unreviewed, build fix for !ENABLE(DFG_JIT).

        * dfg/DFGCommon.h:
        (JSC::DFG::shouldShowDisassembly):
        (DFG):

2012-11-18  Filip Pizlo  <fpizlo@apple.com>

        JSC should have more logging in structure-related code
        https://bugs.webkit.org/show_bug.cgi?id=102630

        Reviewed by Simon Fraser.

        - JSValue::description() now tells you if something is a structure, and if so,
          what kind of structure it is.
        
        - Jettisoning logic now tells you why things are being jettisoned.
        
        - It's now possible to turn off GC-triggered jettisoning entirely.

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::finalizeUnconditionally):
        (JSC::CodeBlock::reoptimize):
        (JSC::ProgramCodeBlock::jettison):
        (JSC::EvalCodeBlock::jettison):
        (JSC::FunctionCodeBlock::jettison):
        * bytecode/CodeBlock.h:
        (JSC::CodeBlock::shouldImmediatelyAssumeLivenessDuringScan):
        * runtime/JSValue.cpp:
        (JSC::JSValue::description):
        * runtime/Options.h:
        (JSC):

2012-11-18  Filip Pizlo  <fpizlo@apple.com>

        DFG constant folding phase should say 'changed = true' whenever it changes the graph
        https://bugs.webkit.org/show_bug.cgi?id=102550

        Rubber stamped by Mark Hahnenberg.

        * dfg/DFGConstantFoldingPhase.cpp:
        (JSC::DFG::ConstantFoldingPhase::foldConstants):

2012-11-17  Elliott Sprehn  <esprehn@chromium.org>

        Expose JSObject removeDirect and PrivateName to WebCore
        https://bugs.webkit.org/show_bug.cgi?id=102546

        Reviewed by Geoffrey Garen.

        Export removeDirect for use in WebCore so JSDependentRetained works.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:

2012-11-16  Filip Pizlo  <fpizlo@apple.com>

        Given a PutById or GetById with a proven structure, the DFG should be able to emit a PutByOffset or GetByOffset instead
        https://bugs.webkit.org/show_bug.cgi?id=102327

        Reviewed by Mark Hahnenberg.

        If the profiler tells us that a GetById or PutById may be polymorphic but our
        control flow analysis proves that it isn't, we should trust the control flow
        analysis over the profiler. This arises in cases where GetById or PutById were
        inlined: the inlined function may have been called from other places that led
        to polymorphism, but in the current inlined context, there is no polymorphism.

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::dump):
        * bytecode/GetByIdStatus.cpp:
        (JSC::GetByIdStatus::computeFor):
        (JSC):
        * bytecode/GetByIdStatus.h:
        (JSC::GetByIdStatus::GetByIdStatus):
        (GetByIdStatus):
        * bytecode/PutByIdStatus.cpp:
        (JSC::PutByIdStatus::computeFor):
        (JSC):
        * bytecode/PutByIdStatus.h:
        (JSC):
        (JSC::PutByIdStatus::PutByIdStatus):
        (PutByIdStatus):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGAbstractValue.h:
        (JSC::DFG::AbstractValue::bestProvenStructure):
        (AbstractValue):
        * dfg/DFGConstantFoldingPhase.cpp:
        (JSC::DFG::ConstantFoldingPhase::foldConstants):
        (JSC::DFG::ConstantFoldingPhase::addStructureTransitionCheck):
        (ConstantFoldingPhase):
        * dfg/DFGNode.h:
        (JSC::DFG::Node::convertToGetByOffset):
        (Node):
        (JSC::DFG::Node::convertToPutByOffset):
        (JSC::DFG::Node::hasStorageResult):
        * runtime/JSGlobalObject.h:
        (JSC::Structure::prototypeChain):
        (JSC):
        (JSC::Structure::isValid):
        * runtime/Operations.h:
        (JSC::isPrototypeChainNormalized):
        (JSC):
        * runtime/Structure.h:
        (Structure):
        (JSC::Structure::transitionDidInvolveSpecificValue):

2012-11-16  Tony Chang  <tony@chromium.org>

        Remove ENABLE_CSS_HIERARCHIES since it's no longer in use
        https://bugs.webkit.org/show_bug.cgi?id=102554

        Reviewed by Andreas Kling.

        As mentioned in https://bugs.webkit.org/show_bug.cgi?id=79939#c41 ,
        we're going to revist this feature once additional vendor support is
        achieved.

        * Configurations/FeatureDefines.xcconfig:

2012-11-16  Patrick Gansterer  <paroga@webkit.org>

        Build fix for WinCE after r133688.

        Use numeric_limits<uint32_t>::max() instead of UINT32_MAX.

        * runtime/CodeCache.h:
        (JSC::CacheMap::CacheMap):

2012-11-15  Filip Pizlo  <fpizlo@apple.com>

        ClassInfo.h should have correct indentation.

        Rubber stamped by Mark Hahnenberg.

        ClassInfo.h had some true creativity in its use of whitespace. Some things within
        the namespace were indented four spaces and others where not. One #define had its
        contents indented four spaces, while another didn't. I applied the following rule:
        
        - Non-macro things in the namespace should not be indented (that's our current
          accepted practice).
        
        - Macros should never be indented but if they are multi-line then their subsequent
          bodies should be indented four spaces. I believe that is consistent with what we
          do elsewhere.

        * runtime/ClassInfo.h:
        (JSC):
        (MethodTable):
        (ClassInfo):
        (JSC::ClassInfo::propHashTable):
        (JSC::ClassInfo::isSubClassOf):
        (JSC::ClassInfo::hasStaticProperties):

2012-11-15  Filip Pizlo  <fpizlo@apple.com>

        DFG should copy propagate trivially no-op ConvertThis
        https://bugs.webkit.org/show_bug.cgi?id=102445

        Reviewed by Oliver Hunt.

        Copy propagation is always a good thing, since it reveals must-alias relationships
        to the CFA and CSE. This accomplishes copy propagation for ConvertThis by first
        converting it to an Identity node (which is done by the constant folder since it
        has access to CFA results) and then performing substitution of references to
        Identity with references to Identity's child in the CSE.
        
        I'm not aiming for a big speed-up here; I just think that this will be useful for
        the work on https://bugs.webkit.org/show_bug.cgi?id=102327.

        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGCSEPhase.cpp:
        (JSC::DFG::CSEPhase::performNodeCSE):
        * dfg/DFGConstantFoldingPhase.cpp:
        (JSC::DFG::ConstantFoldingPhase::foldConstants):
        * dfg/DFGNodeType.h:
        (DFG):
        * dfg/DFGPredictionPropagationPhase.cpp:
        (JSC::DFG::PredictionPropagationPhase::propagate):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):

2012-11-15  Filip Pizlo  <fpizlo@apple.com>

        CallData.h should have correct indentation.

        Rubber stamped by Mark Hahneberg.

        * runtime/CallData.h:
        (JSC):

2012-11-15  Filip Pizlo  <fpizlo@apple.com>

        Remove methodCallDummy since it is not used anymore.

        Rubber stamped by Mark Hahnenberg.

        * runtime/JSGlobalObject.cpp:
        (JSC::JSGlobalObject::reset):
        (JSC):
        (JSC::JSGlobalObject::visitChildren):
        * runtime/JSGlobalObject.h:
        (JSGlobalObject):

2012-11-14  Filip Pizlo  <fpizlo@apple.com>

        Structure should be able to easily tell if the prototype chain might intercept a store
        https://bugs.webkit.org/show_bug.cgi?id=102326

        Reviewed by Geoffrey Garen.

        This improves our ability to reason about the correctness of the more optimized
        prototype chain walk in JSObject::put(), while also making it straight forward to
        check if the prototype chain will do strange things to a property store by just
        looking at the structure.

        * runtime/JSObject.cpp:
        (JSC::JSObject::put):
        * runtime/Structure.cpp:
        (JSC::Structure::prototypeChainMayInterceptStoreTo):
        (JSC):
        * runtime/Structure.h:
        (Structure):

2012-11-15  Thiago Marcos P. Santos  <thiago.santos@intel.com>

        [CMake] Do not regenerate LLIntAssembly.h on every incremental build
        https://bugs.webkit.org/show_bug.cgi?id=102248

        Reviewed by Kenneth Rohde Christiansen.

        Update LLIntAssembly.h's mtime after running asm.rb to make the build
        system dependency tracking consistent.

        * CMakeLists.txt:

2012-11-15  Thiago Marcos P. Santos  <thiago.santos@intel.com>

        Fix compiler warnings about signed/unsigned comparison on i386
        https://bugs.webkit.org/show_bug.cgi?id=102249

        Reviewed by Kenneth Rohde Christiansen.

        Add casting to unsigned to shut up gcc warnings. Build was broken on
        JSVALUE32_64 ports compiling with -Werror.

        * llint/LLIntData.cpp:
        (JSC::LLInt::Data::performAssertions):

2012-11-14  Brent Fulgham  <bfulgham@webkit.org>

        [Windows, WinCairo] Unreviewed build fix.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
        Missed one of the exports that was part of the WebKit2.def.

2012-11-14  Brent Fulgham  <bfulgham@webkit.org>

        [Windows, WinCairo] Correct build failure.
        https://bugs.webkit.org/show_bug.cgi?id=102302

        WebCore symbols were mistakenly added to the JavaScriptCore
        library definition file.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def: Remove
        WebCore symbols that were incorrectly added to the export file.

2012-11-14  Mark Lam  <mark.lam@apple.com>

        Change JSEventListener::m_jsFunction to be a weak ref.
        https://bugs.webkit.org/show_bug.cgi?id=101989.

        Reviewed by Geoffrey Garen.

        Added infrastructure for scanning weak ref slots.

        * heap/SlotVisitor.cpp: Added #include "SlotVisitorInlines.h".
        * heap/SlotVisitor.h:
        (SlotVisitor): Added SlotVisitor::appendUnbarrieredWeak().
        * heap/SlotVisitorInlines.h: Added #include "Weak.h".
        (JSC::SlotVisitor::appendUnbarrieredWeak): Added.
        * heap/Weak.h:
        (JSC::operator==): Added operator==() for Weak.
        * runtime/JSCell.h: Removed #include "SlotVisitorInlines.h".
        * runtime/JSObject.h: Added #include "SlotVisitorInlines.h".

2012-11-14  Filip Pizlo  <fpizlo@apple.com>

        Read-only properties created with putDirect() should tell the structure that there are read-only properties
        https://bugs.webkit.org/show_bug.cgi?id=102292

        Reviewed by Gavin Barraclough.

        This mostly affects things like function.length.

        * runtime/JSObject.h:
        (JSC::JSObject::putDirectInternal):

2012-11-13  Filip Pizlo  <fpizlo@apple.com>

        Don't access Node& after adding nodes to the graph.
        https://bugs.webkit.org/show_bug.cgi?id=102005

        Reviewed by Oliver Hunt.

        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::fixupNode):

2012-11-14  Valery Ignatyev  <valery.ignatyev@ispras.ru>

        Replace (typeof(x) != <"object", "undefined", ...>) with
        !(typeof(x) == <"object",..>). Later is_object, is_<...>  bytecode operation
        will be used.

        https://bugs.webkit.org/show_bug.cgi?id=98893

        Reviewed by Filip Pizlo.

        This eliminates expensive  typeof implementation and
        allows to use DFG optimizations, which doesn't support 'typeof'.

        * bytecompiler/NodesCodegen.cpp:
        (JSC::BinaryOpNode::emitBytecode):

2012-11-14  Peter Gal  <galpeter@inf.u-szeged.hu>

        [Qt][ARM]REGRESSION(r133985): It broke the build
        https://bugs.webkit.org/show_bug.cgi?id=101740

        Reviewed by Csaba Osztrogonác.

        Changed the emitGenericContiguousPutByVal to accept the additional IndexingType argument.
        This information was passed as a template parameter.        

        * jit/JIT.h:
        (JSC::JIT::emitInt32PutByVal):
        (JSC::JIT::emitDoublePutByVal):
        (JSC::JIT::emitContiguousPutByVal):
        (JIT):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emitGenericContiguousPutByVal):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::emitGenericContiguousPutByVal):

2012-11-14  Peter Gal  <galpeter@inf.u-szeged.hu>

        Fix the MIPS build after r134332
        https://bugs.webkit.org/show_bug.cgi?id=102227

        Reviewed by Csaba Osztrogonác.

        Added missing methods for the MacroAssemblerMIPS, based on the MacroAssemblerARMv7.

        * assembler/MacroAssemblerMIPS.h:
        (JSC::MacroAssemblerMIPS::canJumpReplacePatchableBranchPtrWithPatch):
        (MacroAssemblerMIPS):
        (JSC::MacroAssemblerMIPS::startOfPatchableBranchPtrWithPatch):
        (JSC::MacroAssemblerMIPS::revertJumpReplacementToPatchableBranchPtrWithPatch):

2012-11-14  Peter Gal  <galpeter@inf.u-szeged.hu>

        Fix the [-Wreturn-type] warning in JavaScriptCore/assembler/MacroAssemblerARM.h
        https://bugs.webkit.org/show_bug.cgi?id=102206

        Reviewed by Csaba Osztrogonác.

        Add a return value for the function to suppress the warning.

        * assembler/MacroAssemblerARM.h:
        (JSC::MacroAssemblerARM::startOfPatchableBranchPtrWithPatch):

2012-11-14  Sheriff Bot  <webkit.review.bot@gmail.com>

        Unreviewed, rolling out r134599.
        http://trac.webkit.org/changeset/134599
        https://bugs.webkit.org/show_bug.cgi?id=102225

        It broke the 32 bit EFL build (Requested by Ossy on #webkit).

        * jit/JITPropertyAccess.cpp:
        * jit/JITPropertyAccess32_64.cpp:
        (JSC):
        (JSC::JIT::emitGenericContiguousPutByVal):

2012-11-14  Balazs Kilvady  <kilvadyb@homejinni.com>

        [Qt][ARM]REGRESSION(r133985): It broke the build
        https://bugs.webkit.org/show_bug.cgi?id=101740

        Reviewed by Csaba Osztrogonác.

        Template function body moved to fix VALUE_PROFILER disabled case.

        * jit/JITPropertyAccess.cpp:
        (JSC):
        (JSC::JIT::emitGenericContiguousPutByVal):
        * jit/JITPropertyAccess32_64.cpp:

2012-11-13  Filip Pizlo  <fpizlo@apple.com>

        DFG CreateThis should be able to statically account for the structure of the object it creates, if profiling indicates that this structure is always the same
        https://bugs.webkit.org/show_bug.cgi?id=102017

        Reviewed by Geoffrey Garen.

        This adds a watchpoint in JSFunction on the cached inheritor ID. It also changes
        NewObject to take a structure as an operand (previously it implicitly used the owning
        global object's empty object structure). Any GetCallee where the callee is predictable
        is turned into a CheckFunction + WeakJSConstant, and any CreateThis on a WeakJSConstant
        where the inheritor ID watchpoint is still valid is turned into an InheritorIDWatchpoint
        followed by a NewObject. NewObject already accounts for the structure it uses for object
        creation in the CFA.

        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::parseBlock):
        * dfg/DFGCSEPhase.cpp:
        (JSC::DFG::CSEPhase::checkFunctionElimination):
        * dfg/DFGGraph.cpp:
        (JSC::DFG::Graph::dump):
        * dfg/DFGNode.h:
        (JSC::DFG::Node::hasFunction):
        (JSC::DFG::Node::function):
        (JSC::DFG::Node::hasStructure):
        * dfg/DFGNodeType.h:
        (DFG):
        * dfg/DFGOperations.cpp:
        * dfg/DFGOperations.h:
        * dfg/DFGPredictionPropagationPhase.cpp:
        (JSC::DFG::PredictionPropagationPhase::propagate):
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::callOperation):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * runtime/Executable.h:
        (JSC::JSFunction::JSFunction):
        * runtime/JSBoundFunction.cpp:
        (JSC):
        * runtime/JSFunction.cpp:
        (JSC::JSFunction::JSFunction):
        (JSC::JSFunction::put):
        (JSC::JSFunction::defineOwnProperty):
        * runtime/JSFunction.h:
        (JSC::JSFunction::tryGetKnownInheritorID):
        (JSFunction):
        (JSC::JSFunction::addInheritorIDWatchpoint):

2012-11-13  Filip Pizlo  <fpizlo@apple.com>

        JSFunction and its descendants should be destructible
        https://bugs.webkit.org/show_bug.cgi?id=102062

        Reviewed by Mark Hahnenberg.

        This will make it easy to place an InlineWatchpointSet inside JSFunction. In the
        future, we could make JSFunction non-destructible again by making a version of
        WatchpointSet that is entirely GC'd, but this seems like overkill for now.
        
        This is performance-neutral.

        * runtime/JSBoundFunction.cpp:
        (JSC::JSBoundFunction::destroy):
        (JSC):
        * runtime/JSBoundFunction.h:
        (JSBoundFunction):
        * runtime/JSFunction.cpp:
        (JSC):
        (JSC::JSFunction::destroy):
        * runtime/JSFunction.h:
        (JSFunction):

2012-11-13  Cosmin Truta  <ctruta@rim.com>

        Uninitialized fields in class JSLock
        https://bugs.webkit.org/show_bug.cgi?id=101695

        Reviewed by Mark Hahnenberg.

        Initialize JSLock::m_ownerThread and JSLock::m_lockDropDepth.

        * runtime/JSLock.cpp:
        (JSC::JSLock::JSLock):

2012-11-13  Peter Gal  <galpeter@inf.u-szeged.hu>

        Fix the ARM traditional build after r134332
        https://bugs.webkit.org/show_bug.cgi?id=102044

        Reviewed by Zoltan Herczeg.

        Added missing methods for the MacroAssemblerARM, based on the MacroAssemblerARMv7.

        * assembler/MacroAssemblerARM.h:
        (JSC::MacroAssemblerARM::canJumpReplacePatchableBranchPtrWithPatch):
        (MacroAssemblerARM):
        (JSC::MacroAssemblerARM::startOfPatchableBranchPtrWithPatch):
        (JSC::MacroAssemblerARM::revertJumpReplacementToPatchableBranchPtrWithPatch):

2012-11-12  Filip Pizlo  <fpizlo@apple.com>

        op_get_callee should have value profiling
        https://bugs.webkit.org/show_bug.cgi?id=102047

        Reviewed by Sam Weinig.

        This will allow us to detect if the callee is always the same, which is probably
        the common case for a lot of constructors.

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::CodeBlock):
        * bytecode/Opcode.h:
        (JSC):
        (JSC::padOpcodeName):
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::BytecodeGenerator::BytecodeGenerator):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_op_get_callee):
        * jit/JITOpcodes32_64.cpp:
        (JSC::JIT::emit_op_get_callee):
        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm:

2012-11-12  Filip Pizlo  <fpizlo@apple.com>

        The act of getting the callee during 'this' construction should be explicit in bytecode
        https://bugs.webkit.org/show_bug.cgi?id=102016

        Reviewed by Michael Saboff.

        This is mostly a rollout of http://trac.webkit.org/changeset/116673, but also includes
        changes to have create_this use the result of get_callee.
        
        No performance or behavioral impact. This is just meant to allow us to profile
        get_callee in the future.

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::dump):
        * bytecode/Opcode.h:
        (JSC):
        (JSC::padOpcodeName):
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::BytecodeGenerator::BytecodeGenerator):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::parseBlock):
        * dfg/DFGCapabilities.h:
        (JSC::DFG::canCompileOpcode):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompileMainPass):
        * jit/JIT.h:
        (JIT):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_op_get_callee):
        (JSC):
        (JSC::JIT::emit_op_create_this):
        * jit/JITOpcodes32_64.cpp:
        (JSC::JIT::emit_op_get_callee):
        (JSC):
        (JSC::JIT::emit_op_create_this):
        * llint/LLIntSlowPaths.cpp:
        (JSC::LLInt::LLINT_SLOW_PATH_DECL):
        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm:

2012-11-12  Filip Pizlo  <fpizlo@apple.com>

        Unreviewed, fix ARMv7 build.

        * assembler/MacroAssemblerARMv7.h:
        (JSC::MacroAssemblerARMv7::startOfPatchableBranchPtrWithPatch):
        (JSC::MacroAssemblerARMv7::revertJumpReplacementToPatchableBranchPtrWithPatch):

2012-11-12  Filip Pizlo  <fpizlo@apple.com>

        Patching of jumps to stubs should use jump replacement rather than branch destination overwrite
        https://bugs.webkit.org/show_bug.cgi?id=101909

        Reviewed by Geoffrey Garen.

        This saves a few instructions in inline cases, on those architectures where it is
        easy to figure out where to put the jump replacement. Sub-1% speed-up across the
        board.

        * assembler/MacroAssemblerARMv7.h:
        (MacroAssemblerARMv7):
        (JSC::MacroAssemblerARMv7::canJumpReplacePatchableBranchPtrWithPatch):
        (JSC::MacroAssemblerARMv7::startOfPatchableBranchPtrWithPatch):
        (JSC::MacroAssemblerARMv7::revertJumpReplacementToPatchableBranchPtrWithPatch):
        * assembler/MacroAssemblerX86.h:
        (JSC::MacroAssemblerX86::canJumpReplacePatchableBranchPtrWithPatch):
        (MacroAssemblerX86):
        (JSC::MacroAssemblerX86::startOfPatchableBranchPtrWithPatch):
        (JSC::MacroAssemblerX86::revertJumpReplacementToPatchableBranchPtrWithPatch):
        * assembler/MacroAssemblerX86_64.h:
        (JSC::MacroAssemblerX86_64::canJumpReplacePatchableBranchPtrWithPatch):
        (MacroAssemblerX86_64):
        (JSC::MacroAssemblerX86_64::startOfPatchableBranchPtrWithPatch):
        (JSC::MacroAssemblerX86_64::revertJumpReplacementToPatchableBranchPtrWithPatch):
        * assembler/RepatchBuffer.h:
        (JSC::RepatchBuffer::startOfPatchableBranchPtrWithPatch):
        (RepatchBuffer):
        (JSC::RepatchBuffer::replaceWithJump):
        (JSC::RepatchBuffer::revertJumpReplacementToPatchableBranchPtrWithPatch):
        * assembler/X86Assembler.h:
        (X86Assembler):
        (JSC::X86Assembler::revertJumpTo_movq_i64r):
        (JSC::X86Assembler::revertJumpTo_cmpl_im_force32):
        (X86InstructionFormatter):
        * bytecode/StructureStubInfo.h:
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::replaceWithJump):
        (DFG):
        (JSC::DFG::tryCacheGetByID):
        (JSC::DFG::tryBuildGetByIDList):
        (JSC::DFG::tryBuildGetByIDProtoList):
        (JSC::DFG::tryCachePutByID):
        (JSC::DFG::dfgResetGetByID):
        (JSC::DFG::dfgResetPutByID):

2012-11-11  Filip Pizlo  <fpizlo@apple.com>

        DFG ArithMul overflow check elimination is too aggressive
        https://bugs.webkit.org/show_bug.cgi?id=101871

        Reviewed by Oliver Hunt.

        The code was ignoring the fact that ((a * b) | 0) == (((a | 0) * (b | 0)) | 0)
        only holds if a * b < 2^53. So, I changed it to only enable the optimization
        when a < 2^22 and b is an int32 (and vice versa), using a super trivial peephole
        analysis to prove the inequality. I considered writing an epic forward flow
        formulation that tracks the ranges of integer values but then I thought better
        of it.
        
        This also rewires the ArithMul integer speculation logic. Previously, we would
        assume that an ArithMul was only UsedAsNumber if it escaped, and separately we
        would decide whether to speculate integer based on a proof of the <2^22
        inequality. Now, we treat the double rounding behavior of ArithMul as if the
        result was UsedAsNumber even if it did not escape. Then we try to prove that
        double rounding cannot happen by attemping to prove that a < 2^22. This then
        feeds back into the decision of whether or not to speculate integer (if we fail
        to prove a < 2^22 then we're UsedAsNumber, and if we're also MayOverflow then
        that forces double speculation).
        
        No performance impact. It just fixes a bug.

        * dfg/DFGGraph.h:
        (JSC::DFG::Graph::mulShouldSpeculateInteger):
        * dfg/DFGPredictionPropagationPhase.cpp:
        (PredictionPropagationPhase):
        (JSC::DFG::PredictionPropagationPhase::isWithinPowerOfTwoForConstant):
        (JSC::DFG::PredictionPropagationPhase::isWithinPowerOfTwoNonRecursive):
        (JSC::DFG::PredictionPropagationPhase::isWithinPowerOfTwo):
        (JSC::DFG::PredictionPropagationPhase::propagate):

2012-11-11  Filip Pizlo  <fpizlo@apple.com>

        DFG should not emit function checks if we've already proved that the operand is that exact function
        https://bugs.webkit.org/show_bug.cgi?id=101885

        Reviewed by Oliver Hunt.

        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGAbstractValue.h:
        (JSC::DFG::AbstractValue::filterByValue):
        (AbstractValue):
        * dfg/DFGConstantFoldingPhase.cpp:
        (JSC::DFG::ConstantFoldingPhase::foldConstants):

2012-11-12  Kentaro Hara  <haraken@chromium.org>

        [V8][JSC] ScriptProfileNode::callUID needs not to be [Custom]
        https://bugs.webkit.org/show_bug.cgi?id=101892

        Reviewed by Adam Barth.

        Added callUID(), which enables us to kill custom bindings for ScriptProfileNode::callUID.

        * profiler/ProfileNode.h:
        (JSC::ProfileNode::callUID):

2012-11-12  Carlos Garcia Campos  <cgarcia@igalia.com>

        Unreviewed. Fix make distcheck.

        * GNUmakefile.list.am: Add missing header.

2012-11-11  Michael Pruett  <michael@68k.org>

        Fix assertion failure in JSObject::tryGetIndexQuickly()
        https://bugs.webkit.org/show_bug.cgi?id=101869

        Reviewed by Filip Pizlo.

        Currently JSObject::tryGetIndexQuickly() triggers an assertion
        failure when the object has an undecided indexing type. This
        case should be treated the same as a blank indexing type.

        * runtime/JSObject.h:
        (JSC::JSObject::tryGetIndexQuickly):

2012-11-11  Filip Pizlo  <fpizlo@apple.com>

        DFG register allocation should be greedy rather than round-robin
        https://bugs.webkit.org/show_bug.cgi?id=101870

        Reviewed by Geoffrey Garen.

        This simplifies the code, reduces some code duplication, and shows some slight
        performance improvements in a few places, likely due to the fact that lower-numered
        registers also typically have smaller encodings.

        * dfg/DFGRegisterBank.h:
        (JSC::DFG::RegisterBank::RegisterBank):
        (JSC::DFG::RegisterBank::tryAllocate):
        (JSC::DFG::RegisterBank::allocate):
        (JSC::DFG::RegisterBank::allocateInternal):
        (RegisterBank):

2012-11-11  Kenichi Ishibashi  <bashi@chromium.org>

        WTFString::utf8() should have a mode of conversion to use replacement character
        https://bugs.webkit.org/show_bug.cgi?id=101678

        Reviewed by Alexey Proskuryakov.

        Follow the change on String::utf8()

        * runtime/JSGlobalObjectFunctions.cpp:
        (JSC::encode): Pass String::StrictConversion instead of true to String::utf8().

2012-11-10  Filip Pizlo  <fpizlo@apple.com>

        DFG should optimize out the NaN check on loads from double arrays if the array prototype chain is having a great time
        https://bugs.webkit.org/show_bug.cgi?id=101718

        Reviewed by Geoffrey Garen.

        If we're reading from a JSArray in double mode, where the array's structure is
        primordial (all aspects of the structure are unchanged except for indexing type),
        and the result of the load is used in arithmetic that is known to not distinguish
        between NaN and undefined, then we should not emit a NaN check. Looks like a 5%
        win on navier-stokes.
        
        Also fixed an OpInfo initialization goof for String ops that was revealed by this
        change.

        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGArrayMode.cpp:
        (JSC::DFG::arraySpeculationToString):
        * dfg/DFGArrayMode.h:
        (JSC::DFG::ArrayMode::isSaneChain):
        (ArrayMode):
        (JSC::DFG::ArrayMode::isInBounds):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::handleIntrinsic):
        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::fixupNode):
        * dfg/DFGNodeFlags.cpp:
        (JSC::DFG::nodeFlagsAsString):
        * dfg/DFGNodeFlags.h:
        (DFG):
        * dfg/DFGPredictionPropagationPhase.cpp:
        (JSC::DFG::PredictionPropagationPhase::propagate):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * runtime/JSGlobalObject.cpp:
        (JSC::JSGlobalObject::arrayPrototypeChainIsSane):
        (JSC):
        * runtime/JSGlobalObject.h:
        (JSGlobalObject):

2012-11-10  Filip Pizlo  <fpizlo@apple.com>

        DFG constant folding and CFG simplification should be smart enough to know that if a logical op's operand is proven to have a non-masquerading structure then it always evaluates to true
        https://bugs.webkit.org/show_bug.cgi?id=101511

        Reviewed by Geoffrey Garen.
        
        This is the second attempt at this patch, which fixes the !"" case.

        To make life easier, this moves BranchDirection into BasicBlock so that after
        running the CFA, we always know, for each block, what direction the CFA
        proved. CFG simplification now both uses and preserves cfaBranchDirection in
        its transformations.
        
        Also made both LogicalNot and Branch check whether the operand is a known cell
        with a known structure, and if so, made them do the appropriate folding.
        
        5% speed-up on V8/raytrace because it makes raytrace's own null checks
        evaporate (i.e. idioms like 'if (!x) throw "unhappiness"') thanks to the fact
        that we were already doing structure check hoisting.

        * JavaScriptCore.xcodeproj/project.pbxproj:
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::endBasicBlock):
        (JSC::DFG::AbstractState::execute):
        (JSC::DFG::AbstractState::mergeToSuccessors):
        * dfg/DFGAbstractState.h:
        (AbstractState):
        * dfg/DFGBasicBlock.h:
        (JSC::DFG::BasicBlock::BasicBlock):
        (BasicBlock):
        * dfg/DFGBranchDirection.h: Added.
        (DFG):
        (JSC::DFG::branchDirectionToString):
        (JSC::DFG::isKnownDirection):
        (JSC::DFG::branchCondition):
        * dfg/DFGCFGSimplificationPhase.cpp:
        (JSC::DFG::CFGSimplificationPhase::run):
        (JSC::DFG::CFGSimplificationPhase::mergeBlocks):

2012-11-10  Sheriff Bot  <webkit.review.bot@gmail.com>

        Unreviewed, rolling out r133971.
        http://trac.webkit.org/changeset/133971
        https://bugs.webkit.org/show_bug.cgi?id=101839

        Causes WebProcess to hang at 100% on www.apple.com (Requested
        by kling on #webkit).

        * JavaScriptCore.xcodeproj/project.pbxproj:
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::endBasicBlock):
        (JSC::DFG::AbstractState::execute):
        (JSC::DFG::AbstractState::mergeToSuccessors):
        * dfg/DFGAbstractState.h:
        (JSC::DFG::AbstractState::branchDirectionToString):
        (AbstractState):
        * dfg/DFGBasicBlock.h:
        (JSC::DFG::BasicBlock::BasicBlock):
        (BasicBlock):
        * dfg/DFGBranchDirection.h: Removed.
        * dfg/DFGCFGSimplificationPhase.cpp:
        (JSC::DFG::CFGSimplificationPhase::run):
        (JSC::DFG::CFGSimplificationPhase::mergeBlocks):

2012-11-09  Filip Pizlo  <fpizlo@apple.com>

        If the DFG ArrayMode says that an access is on an OriginalArray, then the checks should always enforce this
        https://bugs.webkit.org/show_bug.cgi?id=101720

        Reviewed by Mark Hahnenberg.

        Previously, "original" arrays was just a hint that we could find the structure
        of the array if we needed to even if the array profile didn't have it due to
        polymorphism. Now, "original" arrays are a property that is actually checked:
        if an array access has ArrayMode::arrayClass() == Array::OriginalArray, then we
        can be sure that the code performing the access is dealing with not just a
        JSArray, but a JSArray that has no named properties, no indexed accessors, and
        the ArrayPrototype as its prototype. This will be useful for optimizations that
        are being done as part of https://bugs.webkit.org/show_bug.cgi?id=101720.

        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGArrayMode.cpp:
        (JSC::DFG::ArrayMode::originalArrayStructure):
        (DFG):
        (JSC::DFG::ArrayMode::alreadyChecked):
        * dfg/DFGArrayMode.h:
        (JSC):
        (DFG):
        (JSC::DFG::ArrayMode::withProfile):
        (ArrayMode):
        (JSC::DFG::ArrayMode::benefitsFromOriginalArray):
        * dfg/DFGConstantFoldingPhase.cpp:
        (JSC::DFG::ConstantFoldingPhase::foldConstants):
        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::checkArray):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::jumpSlowForUnwantedArrayMode):
        (JSC::DFG::SpeculativeJIT::checkArray):
        (JSC::DFG::SpeculativeJIT::compileGetByValOnString):
        (JSC::DFG::SpeculativeJIT::compileGetByValOnIntTypedArray):
        (JSC::DFG::SpeculativeJIT::compileGetByValOnFloatTypedArray):
        (JSC::DFG::SpeculativeJIT::compilePutByValForFloatTypedArray):
        (JSC::DFG::SpeculativeJIT::compileGetByValOnArguments):
        (JSC::DFG::SpeculativeJIT::compileGetArgumentsLength):

2012-11-09  Filip Pizlo  <fpizlo@apple.com>

        Fix indentation of BooleanPrototype.h

        Rubber stamped by Mark Hahnenberg.

        * runtime/BooleanPrototype.h:

2012-11-09  Filip Pizlo  <fpizlo@apple.com>

        Fix indentation of BooleanObject.h

        Rubber stamped by Mark Hahnenberg.

        * runtime/BooleanObject.h:

2012-11-09  Filip Pizlo  <fpizlo@apple.com>

        Fix indentation of BooleanConstructor.h

        Rubber stamped by Mark Hahnenberg.

        * runtime/BooleanConstructor.h:

2012-11-09  Filip Pizlo  <fpizlo@apple.com>

        Fix indentation of BatchedTransitionOptimizer.h

        Rubber stamped by Mark Hahnenberg.

        * runtime/BatchedTransitionOptimizer.h:

2012-11-09  Oliver Hunt  <oliver@apple.com>

        So Thingy probably isn't the best name for a class, so
        renamed to CacheMap.

        RS=Geoff

        * runtime/CodeCache.h:
        (JSC::CacheMap::CacheMap):

2012-11-09  Filip Pizlo  <fpizlo@apple.com>

        ArrayPrototype should start out with a blank indexing type
        https://bugs.webkit.org/show_bug.cgi?id=101719

        Reviewed by Mark Hahnenberg.

        This allows us to track if the array prototype ever ends up with indexed
        properties.

        * runtime/ArrayPrototype.cpp:
        (JSC::ArrayPrototype::create):
        (JSC::ArrayPrototype::ArrayPrototype):
        * runtime/ArrayPrototype.h:
        (ArrayPrototype):
        (JSC::ArrayPrototype::createStructure):

2012-11-08  Mark Hahnenberg  <mhahnenberg@apple.com>

        MarkStackArray should use the BlockAllocator instead of the MarkStackSegmentAllocator
        https://bugs.webkit.org/show_bug.cgi?id=101642

        Reviewed by Filip Pizlo.

        MarkStackSegmentAllocator is like a miniature version of the BlockAllocator. Now that the BlockAllocator has support 
        for a variety of block sizes, we should get rid of the MarkStackSegmentAllocator in favor of the BlockAllocator.

        * heap/BlockAllocator.h: Add new specializations of regionSetFor for the new MarkStackSegments.
        (JSC):
        (JSC::MarkStackSegment):
        * heap/GCThreadSharedData.cpp:
        (JSC::GCThreadSharedData::GCThreadSharedData):
        (JSC::GCThreadSharedData::reset):
        * heap/GCThreadSharedData.h:
        (GCThreadSharedData):
        * heap/MarkStack.cpp: 
        (JSC::MarkStackArray::MarkStackArray): We now have a doubly linked list of MarkStackSegments, so we need to refactor 
        all the places that used the old custom tail/previous logic.
        (JSC::MarkStackArray::~MarkStackArray):
        (JSC::MarkStackArray::expand):
        (JSC::MarkStackArray::refill):
        (JSC::MarkStackArray::donateSomeCellsTo): Refactor to use the new linked list.
        (JSC::MarkStackArray::stealSomeCellsFrom): Ditto.
        * heap/MarkStack.h:
        (JSC):
        (MarkStackSegment):
        (JSC::MarkStackSegment::MarkStackSegment):
        (JSC::MarkStackSegment::sizeFromCapacity):
        (MarkStackArray):
        * heap/MarkStackInlines.h:
        (JSC::MarkStackSegment::create):
        (JSC):
        (JSC::MarkStackArray::postIncTop):
        (JSC::MarkStackArray::preDecTop):
        (JSC::MarkStackArray::setTopForFullSegment):
        (JSC::MarkStackArray::setTopForEmptySegment):
        (JSC::MarkStackArray::top):
        (JSC::MarkStackArray::validatePrevious):
        (JSC::MarkStackArray::append):
        (JSC::MarkStackArray::removeLast):
        (JSC::MarkStackArray::isEmpty):
        (JSC::MarkStackArray::size):
        * heap/SlotVisitor.cpp:
        (JSC::SlotVisitor::SlotVisitor):

2012-11-09  Gabor Ballabas  <gaborb@inf.u-szeged.hu>

        [Qt] r133953 broke the ARM_TRADITIONAL build
        https://bugs.webkit.org/show_bug.cgi?id=101706

        Reviewed by Csaba Osztrogonác.

        Fix for both hardfp and softfp.

        * dfg/DFGCCallHelpers.h:
        (CCallHelpers):
        (JSC::DFG::CCallHelpers::setupArgumentsWithExecState):

2012-11-09  Sheriff Bot  <webkit.review.bot@gmail.com>

        Unreviewed, rolling out r134051.
        http://trac.webkit.org/changeset/134051
        https://bugs.webkit.org/show_bug.cgi?id=101757

        It didn't fix the build (Requested by Ossy on #webkit).

        * dfg/DFGCCallHelpers.h:
        (JSC::DFG::CCallHelpers::setupArgumentsWithExecState):

2012-11-09  Gabor Ballabas  <gaborb@inf.u-szeged.hu>

        [Qt] r133953 broke the ARM_TRADITIONAL build
        https://bugs.webkit.org/show_bug.cgi?id=101706

        Reviewed by Csaba Osztrogonác.

        Fix the ARM_TRADITIONAL build after r133953

        * dfg/DFGCCallHelpers.h:
        (JSC::DFG::CCallHelpers::setupArgumentsWithExecState):
        (CCallHelpers):

2012-11-09  Csaba Osztrogonác  <ossy@webkit.org>

        [Qt] Fix the LLINT build from ARMv7 platform
        https://bugs.webkit.org/show_bug.cgi?id=101712

        Reviewed by Simon Hausmann.

        Enable generating of LLIntAssembly.h on ARM platforms.

        * DerivedSources.pri:
        * JavaScriptCore.pro:

2012-11-08  Filip Pizlo  <fpizlo@apple.com>

        ArrayPrototype.h should have correct indentation

        Rubber stamped by Sam Weinig.

        * runtime/ArrayPrototype.h:

2012-11-08  Mark Lam  <mark.lam@apple.com>

        Renamed ...InlineMethods.h files to ...Inlines.h.
        https://bugs.webkit.org/show_bug.cgi?id=101145.

        Reviewed by Geoffrey Garen.

        This is only a refactoring effort to rename the files. There are no
        functionality changes.

        * API/JSObjectRef.cpp:
        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * bytecode/CodeBlock.cpp:
        * dfg/DFGOperations.cpp:
        * heap/ConservativeRoots.cpp:
        * heap/CopiedBlock.h:
        * heap/CopiedSpace.cpp:
        * heap/CopiedSpaceInlineMethods.h: Removed.
        * heap/CopiedSpaceInlines.h: Copied from Source/JavaScriptCore/heap/CopiedSpaceInlineMethods.h.
        * heap/CopyVisitor.cpp:
        * heap/CopyVisitorInlineMethods.h: Removed.
        * heap/CopyVisitorInlines.h: Copied from Source/JavaScriptCore/heap/CopyVisitorInlineMethods.h.
        * heap/GCThread.cpp:
        * heap/GCThreadSharedData.cpp:
        * heap/HandleStack.cpp:
        * heap/Heap.cpp:
        * heap/HeapRootVisitor.h:
        * heap/MarkStack.cpp:
        * heap/MarkStackInlineMethods.h: Removed.
        * heap/MarkStackInlines.h: Copied from Source/JavaScriptCore/heap/MarkStackInlineMethods.h.
        * heap/SlotVisitor.cpp:
        * heap/SlotVisitor.h:
        * heap/SlotVisitorInlineMethods.h: Removed.
        * heap/SlotVisitorInlines.h: Copied from Source/JavaScriptCore/heap/SlotVisitorInlineMethods.h.
        * jit/HostCallReturnValue.cpp:
        * jit/JIT.cpp:
        * jit/JITArithmetic.cpp:
        * jit/JITArithmetic32_64.cpp:
        * jit/JITCall.cpp:
        * jit/JITCall32_64.cpp:
        * jit/JITInlineMethods.h: Removed.
        * jit/JITInlines.h: Copied from Source/JavaScriptCore/jit/JITInlineMethods.h.
        * jit/JITOpcodes.cpp:
        * jit/JITOpcodes32_64.cpp:
        * jit/JITPropertyAccess.cpp:
        * jit/JITPropertyAccess32_64.cpp:
        * jsc.cpp:
        * runtime/ArrayConstructor.cpp:
        * runtime/ArrayPrototype.cpp:
        * runtime/ButterflyInlineMethods.h: Removed.
        * runtime/ButterflyInlines.h: Copied from Source/JavaScriptCore/runtime/ButterflyInlineMethods.h.
        * runtime/IndexingHeaderInlineMethods.h: Removed.
        * runtime/IndexingHeaderInlines.h: Copied from Source/JavaScriptCore/runtime/IndexingHeaderInlineMethods.h.
        * runtime/JSActivation.h:
        * runtime/JSArray.cpp:
        * runtime/JSArray.h:
        * runtime/JSCell.h:
        * runtime/JSObject.cpp:
        * runtime/JSValueInlineMethods.h: Removed.
        * runtime/JSValueInlines.h: Copied from Source/JavaScriptCore/runtime/JSValueInlineMethods.h.
        * runtime/LiteralParser.cpp:
        * runtime/ObjectConstructor.cpp:
        * runtime/Operations.h:
        * runtime/RegExpMatchesArray.cpp:
        * runtime/RegExpObject.cpp:
        * runtime/StringPrototype.cpp:

2012-11-08  Filip Pizlo  <fpizlo@apple.com>

        ArrayConstructor.h should have correct indentation

        Rubber stamped by Sam Weinig.

        * runtime/ArrayConstructor.h:

2012-11-08  Filip Pizlo  <fpizlo@apple.com>

        DFG should know that int == null is always false
        https://bugs.webkit.org/show_bug.cgi?id=101665

        Reviewed by Oliver Hunt.

        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):

2012-11-08  Filip Pizlo  <fpizlo@apple.com>

        Arguments.h should have correct indentation

        Rubber stamped by Sam Weinig.

        * runtime/Arguments.h:

2012-11-08  Filip Pizlo  <fpizlo@apple.com>

        It should be possible to JIT compile get_by_vals and put_by_vals even if the DFG is disabled.

        Reviewed by Oliver Hunt.

        * jit/JITInlineMethods.h:
        (JSC::JIT::chooseArrayMode):

2012-11-08  Filip Pizlo  <fpizlo@apple.com>

        op_call should have LLInt call link info even if the DFG is disabled
        https://bugs.webkit.org/show_bug.cgi?id=101672

        Reviewed by Oliver Hunt.

        Get rid of the evil uses of fall-through.

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::CodeBlock):

2012-11-08  Oliver Hunt  <oliver@apple.com>

        Improve effectiveness of function-level caching
        https://bugs.webkit.org/show_bug.cgi?id=101667

        Reviewed by Filip Pizlo.

        Added a random-eviction based cache for unlinked functions, and switch
        UnlinkedFunctionExecutable's code references to Weak<>, thereby letting
        us remove the explicit UnlinkedFunctionExecutable::clearCode() calls that
        were being triggered by GC.

        Refactored the random eviction part of the CodeCache into a separate data
        structure so that I didn't have to duplicate the code again, and then used
        that for the new function cache.

        * bytecode/UnlinkedCodeBlock.cpp:
        (JSC::UnlinkedFunctionExecutable::visitChildren):
        (JSC::UnlinkedFunctionExecutable::codeBlockFor):
        * bytecode/UnlinkedCodeBlock.h:
        (JSC::UnlinkedFunctionExecutable::clearCodeForRecompilation):
        (UnlinkedFunctionExecutable):
        * debugger/Debugger.cpp:
        * runtime/CodeCache.cpp:
        (JSC::CodeCache::getCodeBlock):
        (JSC::CodeCache::generateFunctionCodeBlock):
        (JSC::CodeCache::getFunctionExecutableFromGlobalCode):
        (JSC::CodeCache::usedFunctionCode):
        (JSC):
        * runtime/Executable.cpp:
        (JSC::FunctionExecutable::clearUnlinkedCodeForRecompilationIfNotCompiling):
        (JSC::FunctionExecutable::clearCode):
        * runtime/Executable.h:
        (FunctionExecutable):

2012-11-07  Filip Pizlo  <fpizlo@apple.com>

        DFG constant folding and CFG simplification should be smart enough to know that if a logical op's operand is proven to have a non-masquerading structure then it always evaluates to true
        https://bugs.webkit.org/show_bug.cgi?id=101511

        Reviewed by Oliver Hunt.

        To make life easier, this moves BranchDirection into BasicBlock so that after
        running the CFA, we always know, for each block, what direction the CFA
        proved. CFG simplification now both uses and preserves cfaBranchDirection in
        its transformations.
        
        Also made both LogicalNot and Branch check whether the operand is a known cell
        with a known structure, and if so, made them do the appropriate folding.
        
        5% speed-up on V8/raytrace because it makes raytrace's own null checks
        evaporate (i.e. idioms like 'if (!x) throw "unhappiness"') thanks to the fact
        that we were already doing structure check hoisting.

        * JavaScriptCore.xcodeproj/project.pbxproj:
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::endBasicBlock):
        (JSC::DFG::AbstractState::execute):
        (JSC::DFG::AbstractState::mergeToSuccessors):
        * dfg/DFGAbstractState.h:
        (AbstractState):
        * dfg/DFGBasicBlock.h:
        (JSC::DFG::BasicBlock::BasicBlock):
        (BasicBlock):
        * dfg/DFGBranchDirection.h: Added.
        (DFG):
        (JSC::DFG::branchDirectionToString):
        (JSC::DFG::isKnownDirection):
        (JSC::DFG::branchCondition):
        * dfg/DFGCFGSimplificationPhase.cpp:
        (JSC::DFG::CFGSimplificationPhase::run):
        (JSC::DFG::CFGSimplificationPhase::mergeBlocks):

2012-11-08  Christophe Dumez  <christophe.dumez@intel.com>

        [JSC] HTML extensions to String.prototype should escape " as &quot; in argument values
        https://bugs.webkit.org/show_bug.cgi?id=90667

        Reviewed by Benjamin Poulain.

        Escape quotation mark as &quot; in argument values to:
        - String.prototype.anchor(name)
        - String.prototype.fontcolor(color)
        - String.prototype.fontsize(size)
        - String.prototype.link(href)

        This behavior matches Chromium/V8 and Firefox/Spidermonkey
        implementations and is requited by:
        http://mathias.html5.org/specs/javascript/#escapeattributevalue

        This also fixes a potential security risk (XSS vector).

        * runtime/StringPrototype.cpp:
        (JSC::stringProtoFuncFontcolor):
        (JSC::stringProtoFuncFontsize):
        (JSC::stringProtoFuncAnchor):
        (JSC::stringProtoFuncLink):

2012-11-08  Anders Carlsson  <andersca@apple.com>

        HeapStatistics::s_pauseTimeStarts and s_pauseTimeEnds should be Vectors
        https://bugs.webkit.org/show_bug.cgi?id=101651

        Reviewed by Andreas Kling.

        HeapStatistics uses Deques when Vectors would work just as good.

        * heap/HeapStatistics.cpp:
        * heap/HeapStatistics.h:
        (HeapStatistics):

2012-11-07  Filip Pizlo  <fpizlo@apple.com>

        DFG should not assume that something is a double just because it might be undefined
        https://bugs.webkit.org/show_bug.cgi?id=101438

        Reviewed by Oliver Hunt.

        This changes all non-bitop arithmetic to (a) statically expect that variables are
        defined prior to use in arithmetic and (b) not fall off into double paths just
        because a value may not be a number. This is accomplished with two new notions of
        speculation:
        
        shouldSpeculateIntegerExpectingDefined: Should we speculate that the value is an
        integer if we ignore undefined (i.e. SpecOther) predictions?
        
        shouldSpeculateIntegerForArithmetic: Should we speculate that the value is an
        integer if we ignore non-numeric predictions?
        
        This is a ~2x speed-up on programs that seem to our prediction propagator to have
        paths in which otherwise numeric variables are undefined.

        * bytecode/SpeculatedType.h:
        (JSC::isInt32SpeculationForArithmetic):
        (JSC):
        (JSC::isInt32SpeculationExpectingDefined):
        (JSC::isDoubleSpeculationForArithmetic):
        (JSC::isNumberSpeculationExpectingDefined):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::fixupNode):
        * dfg/DFGGraph.h:
        (JSC::DFG::Graph::addShouldSpeculateInteger):
        (JSC::DFG::Graph::mulShouldSpeculateInteger):
        (JSC::DFG::Graph::negateShouldSpeculateInteger):
        (JSC::DFG::Graph::addImmediateShouldSpeculateInteger):
        (JSC::DFG::Graph::mulImmediateShouldSpeculateInteger):
        * dfg/DFGNode.h:
        (JSC::DFG::Node::shouldSpeculateIntegerForArithmetic):
        (Node):
        (JSC::DFG::Node::shouldSpeculateIntegerExpectingDefined):
        (JSC::DFG::Node::shouldSpeculateDoubleForArithmetic):
        (JSC::DFG::Node::shouldSpeculateNumberExpectingDefined):
        * dfg/DFGPredictionPropagationPhase.cpp:
        (JSC::DFG::PredictionPropagationPhase::propagate):
        (JSC::DFG::PredictionPropagationPhase::doRoundOfDoubleVoting):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::compileAdd):
        (JSC::DFG::SpeculativeJIT::compileArithMod):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * jit/JITArithmetic.cpp:
        (JSC::JIT::emit_op_div):

2012-11-06  Filip Pizlo  <fpizlo@apple.com>

        JSC should infer when indexed storage contains only integers or doubles
        https://bugs.webkit.org/show_bug.cgi?id=98606

        Reviewed by Oliver Hunt.

        This adds two new indexing types: int32 and double. It also adds array allocation profiling,
        which allows array allocations to converge to allocating arrays using those types to which
        those arrays would have been converted.
        
        20% speed-up on navier-stokes. 40% speed-up on various Kraken DSP tests. Some slow-downs too,
        but a performance win overall on all benchmarks we track.

        * API/JSObjectRef.cpp:
        (JSObjectMakeArray):
        * CMakeLists.txt:
        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * Target.pri:
        * assembler/AbstractMacroAssembler.h:
        (JumpList):
        (JSC::AbstractMacroAssembler::JumpList::JumpList):
        * assembler/MacroAssemblerX86Common.h:
        (JSC::MacroAssemblerX86Common::branchDouble):
        * assembler/X86Assembler.h:
        (JSC::X86Assembler::jnp):
        (X86Assembler):
        (JSC::X86Assembler::X86InstructionFormatter::emitRex):
        * bytecode/ArrayAllocationProfile.cpp: Added.
        (JSC):
        (JSC::ArrayAllocationProfile::updateIndexingType):
        * bytecode/ArrayAllocationProfile.h: Added.
        (JSC):
        (ArrayAllocationProfile):
        (JSC::ArrayAllocationProfile::ArrayAllocationProfile):
        (JSC::ArrayAllocationProfile::selectIndexingType):
        (JSC::ArrayAllocationProfile::updateLastAllocation):
        (JSC::ArrayAllocationProfile::selectIndexingTypeFor):
        (JSC::ArrayAllocationProfile::updateLastAllocationFor):
        * bytecode/ArrayProfile.cpp:
        (JSC::ArrayProfile::updatedObservedArrayModes):
        (JSC):
        * bytecode/ArrayProfile.h:
        (JSC):
        (JSC::arrayModesInclude):
        (JSC::shouldUseSlowPutArrayStorage):
        (JSC::shouldUseFastArrayStorage):
        (JSC::shouldUseContiguous):
        (JSC::shouldUseDouble):
        (JSC::shouldUseInt32):
        (ArrayProfile):
        * bytecode/ByValInfo.h:
        (JSC::isOptimizableIndexingType):
        (JSC::jitArrayModeForIndexingType):
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::dump):
        (JSC::CodeBlock::CodeBlock):
        (JSC::CodeBlock::updateAllPredictionsAndCountLiveness):
        (JSC):
        (JSC::CodeBlock::updateAllValueProfilePredictions):
        (JSC::CodeBlock::updateAllArrayPredictions):
        (JSC::CodeBlock::updateAllPredictions):
        (JSC::CodeBlock::shouldOptimizeNow):
        * bytecode/CodeBlock.h:
        (CodeBlock):
        (JSC::CodeBlock::numberOfArrayAllocationProfiles):
        (JSC::CodeBlock::addArrayAllocationProfile):
        (JSC::CodeBlock::updateAllValueProfilePredictions):
        (JSC::CodeBlock::updateAllArrayPredictions):
        * bytecode/DFGExitProfile.h:
        (JSC::DFG::exitKindToString):
        * bytecode/Instruction.h:
        (JSC):
        (JSC::Instruction::Instruction):
        * bytecode/Opcode.h:
        (JSC):
        (JSC::padOpcodeName):
        * bytecode/SpeculatedType.h:
        (JSC):
        (JSC::isRealNumberSpeculation):
        * bytecode/UnlinkedCodeBlock.cpp:
        (JSC::UnlinkedCodeBlock::UnlinkedCodeBlock):
        * bytecode/UnlinkedCodeBlock.h:
        (JSC):
        (JSC::UnlinkedCodeBlock::addArrayAllocationProfile):
        (JSC::UnlinkedCodeBlock::numberOfArrayAllocationProfiles):
        (UnlinkedCodeBlock):
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::BytecodeGenerator::newArrayAllocationProfile):
        (JSC):
        (JSC::BytecodeGenerator::emitNewArray):
        (JSC::BytecodeGenerator::emitExpectedFunctionSnippet):
        * bytecompiler/BytecodeGenerator.h:
        (BytecodeGenerator):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGArrayMode.cpp:
        (JSC::DFG::ArrayMode::fromObserved):
        (JSC::DFG::ArrayMode::refine):
        (DFG):
        (JSC::DFG::ArrayMode::alreadyChecked):
        (JSC::DFG::arrayTypeToString):
        * dfg/DFGArrayMode.h:
        (JSC::DFG::ArrayMode::withType):
        (ArrayMode):
        (JSC::DFG::ArrayMode::withTypeAndConversion):
        (JSC::DFG::ArrayMode::usesButterfly):
        (JSC::DFG::ArrayMode::isSpecific):
        (JSC::DFG::ArrayMode::supportsLength):
        (JSC::DFG::ArrayMode::arrayModesThatPassFiltering):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::getArrayMode):
        (ByteCodeParser):
        (JSC::DFG::ByteCodeParser::handleIntrinsic):
        (JSC::DFG::ByteCodeParser::handleConstantInternalFunction):
        (JSC::DFG::ByteCodeParser::parseBlock):
        * dfg/DFGCCallHelpers.h:
        (JSC::DFG::CCallHelpers::setupArgumentsWithExecState):
        (CCallHelpers):
        * dfg/DFGCallArrayAllocatorSlowPathGenerator.h:
        (JSC::DFG::CallArrayAllocatorSlowPathGenerator::generateInternal):
        (JSC::DFG::CallArrayAllocatorWithVariableSizeSlowPathGenerator::generateInternal):
        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::fixupNode):
        (JSC::DFG::FixupPhase::checkArray):
        * dfg/DFGGraph.cpp:
        (JSC::DFG::Graph::dump):
        * dfg/DFGGraph.h:
        (JSC::DFG::Graph::byValIsPure):
        * dfg/DFGNode.h:
        (NewArrayBufferData):
        (JSC::DFG::Node::hasIndexingType):
        (Node):
        (JSC::DFG::Node::indexingType):
        (JSC::DFG::Node::setIndexingType):
        * dfg/DFGOperations.cpp:
        * dfg/DFGOperations.h:
        * dfg/DFGPredictionPropagationPhase.cpp:
        (JSC::DFG::PredictionPropagationPhase::doRoundOfDoubleVoting):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::emitAllocateJSArray):
        (JSC::DFG::SpeculativeJIT::jumpSlowForUnwantedArrayMode):
        (DFG):
        (JSC::DFG::SpeculativeJIT::checkArray):
        (JSC::DFG::SpeculativeJIT::arrayify):
        (JSC::DFG::SpeculativeJIT::compileDoublePutByVal):
        (JSC::DFG::SpeculativeJIT::compileGetArrayLength):
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::callOperation):
        (SpeculativeJIT):
        (SpeculateIntegerOperand):
        (JSC::DFG::SpeculateIntegerOperand::use):
        (SpeculateDoubleOperand):
        (JSC::DFG::SpeculateDoubleOperand::use):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (DFG):
        (JSC::DFG::SpeculativeJIT::compileContiguousPutByVal):
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * jit/JIT.h:
        (JSC::JIT::emitInt32GetByVal):
        (JIT):
        (JSC::JIT::emitInt32PutByVal):
        (JSC::JIT::emitDoublePutByVal):
        (JSC::JIT::emitContiguousPutByVal):
        * jit/JITExceptions.cpp:
        (JSC::genericThrow):
        * jit/JITInlineMethods.h:
        (JSC::arrayProfileSaw):
        (JSC::JIT::chooseArrayMode):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_op_new_array):
        (JSC::JIT::emit_op_new_array_with_size):
        (JSC::JIT::emit_op_new_array_buffer):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emit_op_get_by_val):
        (JSC::JIT::emitDoubleGetByVal):
        (JSC):
        (JSC::JIT::emitContiguousGetByVal):
        (JSC::JIT::emit_op_put_by_val):
        (JSC::JIT::emitGenericContiguousPutByVal):
        (JSC::JIT::emitSlow_op_put_by_val):
        (JSC::JIT::privateCompileGetByVal):
        (JSC::JIT::privateCompilePutByVal):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::emit_op_get_by_val):
        (JSC::JIT::emitContiguousGetByVal):
        (JSC::JIT::emitDoubleGetByVal):
        (JSC):
        (JSC::JIT::emit_op_put_by_val):
        (JSC::JIT::emitGenericContiguousPutByVal):
        (JSC::JIT::emitSlow_op_put_by_val):
        * jit/JITStubs.cpp:
        (JSC::DEFINE_STUB_FUNCTION):
        * jit/JITStubs.h:
        (JSC):
        * jsc.cpp:
        (GlobalObject::finishCreation):
        * llint/LLIntSlowPaths.cpp:
        (JSC::LLInt::jitCompileAndSetHeuristics):
        (JSC::LLInt::LLINT_SLOW_PATH_DECL):
        * llint/LowLevelInterpreter.asm:
        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm:
        * offlineasm/x86.rb:
        * runtime/ArrayConstructor.cpp:
        (JSC::constructArrayWithSizeQuirk):
        * runtime/ArrayConstructor.h:
        (JSC):
        * runtime/ArrayPrototype.cpp:
        (JSC::arrayProtoFuncConcat):
        (JSC::arrayProtoFuncSlice):
        (JSC::arrayProtoFuncSplice):
        (JSC::arrayProtoFuncFilter):
        (JSC::arrayProtoFuncMap):
        * runtime/Butterfly.h:
        (JSC::Butterfly::contiguousInt32):
        (JSC::Butterfly::contiguousDouble):
        (JSC::Butterfly::fromContiguous):
        * runtime/ButterflyInlineMethods.h:
        (JSC::Butterfly::createUninitializedDuringCollection):
        * runtime/FunctionPrototype.cpp:
        (JSC::functionProtoFuncBind):
        * runtime/IndexingHeaderInlineMethods.h:
        (JSC::IndexingHeader::indexingPayloadSizeInBytes):
        * runtime/IndexingType.cpp:
        (JSC::leastUpperBoundOfIndexingTypes):
        (JSC):
        (JSC::leastUpperBoundOfIndexingTypeAndType):
        (JSC::leastUpperBoundOfIndexingTypeAndValue):
        (JSC::indexingTypeToString):
        * runtime/IndexingType.h:
        (JSC):
        (JSC::hasUndecided):
        (JSC::hasInt32):
        (JSC::hasDouble):
        * runtime/JSArray.cpp:
        (JSC::JSArray::setLength):
        (JSC::JSArray::pop):
        (JSC::JSArray::push):
        (JSC::JSArray::shiftCountWithAnyIndexingType):
        (JSC::JSArray::unshiftCountWithAnyIndexingType):
        (JSC::compareNumbersForQSortWithInt32):
        (JSC):
        (JSC::compareNumbersForQSortWithDouble):
        (JSC::JSArray::sortNumericVector):
        (JSC::JSArray::sortNumeric):
        (JSC::JSArray::sortCompactedVector):
        (JSC::JSArray::sort):
        (JSC::JSArray::sortVector):
        (JSC::JSArray::fillArgList):
        (JSC::JSArray::copyToArguments):
        (JSC::JSArray::compactForSorting):
        * runtime/JSArray.h:
        (JSArray):
        (JSC::createContiguousArrayButterfly):
        (JSC::JSArray::create):
        (JSC::JSArray::tryCreateUninitialized):
        * runtime/JSGlobalObject.cpp:
        (JSC::JSGlobalObject::reset):
        (JSC):
        (JSC::JSGlobalObject::haveABadTime):
        (JSC::JSGlobalObject::visitChildren):
        * runtime/JSGlobalObject.h:
        (JSGlobalObject):
        (JSC::JSGlobalObject::originalArrayStructureForIndexingType):
        (JSC::JSGlobalObject::arrayStructureForIndexingTypeDuringAllocation):
        (JSC::JSGlobalObject::arrayStructureForProfileDuringAllocation):
        (JSC::JSGlobalObject::isOriginalArrayStructure):
        (JSC::constructEmptyArray):
        (JSC::constructArray):
        * runtime/JSObject.cpp:
        (JSC::JSObject::copyButterfly):
        (JSC::JSObject::getOwnPropertySlotByIndex):
        (JSC::JSObject::putByIndex):
        (JSC::JSObject::enterDictionaryIndexingMode):
        (JSC::JSObject::createInitialIndexedStorage):
        (JSC):
        (JSC::JSObject::createInitialUndecided):
        (JSC::JSObject::createInitialInt32):
        (JSC::JSObject::createInitialDouble):
        (JSC::JSObject::createInitialContiguous):
        (JSC::JSObject::convertUndecidedToInt32):
        (JSC::JSObject::convertUndecidedToDouble):
        (JSC::JSObject::convertUndecidedToContiguous):
        (JSC::JSObject::constructConvertedArrayStorageWithoutCopyingElements):
        (JSC::JSObject::convertUndecidedToArrayStorage):
        (JSC::JSObject::convertInt32ToDouble):
        (JSC::JSObject::convertInt32ToContiguous):
        (JSC::JSObject::convertInt32ToArrayStorage):
        (JSC::JSObject::convertDoubleToContiguous):
        (JSC::JSObject::convertDoubleToArrayStorage):
        (JSC::JSObject::convertContiguousToArrayStorage):
        (JSC::JSObject::convertUndecidedForValue):
        (JSC::JSObject::convertInt32ForValue):
        (JSC::JSObject::setIndexQuicklyToUndecided):
        (JSC::JSObject::convertInt32ToDoubleOrContiguousWhilePerformingSetIndex):
        (JSC::JSObject::convertDoubleToContiguousWhilePerformingSetIndex):
        (JSC::JSObject::ensureInt32Slow):
        (JSC::JSObject::ensureDoubleSlow):
        (JSC::JSObject::ensureContiguousSlow):
        (JSC::JSObject::ensureArrayStorageSlow):
        (JSC::JSObject::ensureArrayStorageExistsAndEnterDictionaryIndexingMode):
        (JSC::JSObject::switchToSlowPutArrayStorage):
        (JSC::JSObject::deletePropertyByIndex):
        (JSC::JSObject::getOwnPropertyNames):
        (JSC::JSObject::putByIndexBeyondVectorLengthWithoutAttributes):
        (JSC::JSObject::putByIndexBeyondVectorLength):
        (JSC::JSObject::putDirectIndexBeyondVectorLength):
        (JSC::JSObject::getNewVectorLength):
        (JSC::JSObject::countElements):
        (JSC::JSObject::ensureLengthSlow):
        (JSC::JSObject::getOwnPropertyDescriptor):
        * runtime/JSObject.h:
        (JSC::JSObject::getArrayLength):
        (JSC::JSObject::getVectorLength):
        (JSC::JSObject::canGetIndexQuickly):
        (JSC::JSObject::getIndexQuickly):
        (JSC::JSObject::tryGetIndexQuickly):
        (JSC::JSObject::canSetIndexQuickly):
        (JSC::JSObject::canSetIndexQuicklyForPutDirect):
        (JSC::JSObject::setIndexQuickly):
        (JSC::JSObject::initializeIndex):
        (JSC::JSObject::hasSparseMap):
        (JSC::JSObject::inSparseIndexingMode):
        (JSObject):
        (JSC::JSObject::ensureInt32):
        (JSC::JSObject::ensureDouble):
        (JSC::JSObject::ensureLength):
        (JSC::JSObject::indexingData):
        (JSC::JSObject::currentIndexingData):
        (JSC::JSObject::getHolyIndexQuickly):
        (JSC::JSObject::relevantLength):
        (JSC::JSObject::currentRelevantLength):
        * runtime/JSValue.cpp:
        (JSC::JSValue::description):
        * runtime/LiteralParser.cpp:
        (JSC::::parse):
        * runtime/ObjectConstructor.cpp:
        (JSC::objectConstructorGetOwnPropertyNames):
        (JSC::objectConstructorKeys):
        * runtime/StringPrototype.cpp:
        (JSC::stringProtoFuncMatch):
        (JSC::stringProtoFuncSplit):
        * runtime/Structure.cpp:
        (JSC::Structure::nonPropertyTransition):
        * runtime/StructureTransitionTable.h:
        (JSC::newIndexingType):

2012-11-08  Balazs Kilvady  <kilvadyb@homejinni.com>

        ASSERT problem on MIPS
        https://bugs.webkit.org/show_bug.cgi?id=100589

        Reviewed by Oliver Hunt.

        ASSERT fix for MIPS arch.

        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_resolve_operations):

2012-11-08  Michael Saboff  <msaboff@apple.com>

        OpaqueJSClassContextData() should use StringImpl::isolatedCopy() to make string copies
        https://bugs.webkit.org/show_bug.cgi?id=101507

        Reviewed by Andreas Kling.

        Changed to use isolatedCopy() for key Strings.

        * API/JSClassRef.cpp:
        (OpaqueJSClassContextData::OpaqueJSClassContextData):

2012-11-07  Mark Hahnenberg  <mhahnenberg@apple.com>

        WeakBlocks should be HeapBlocks
        https://bugs.webkit.org/show_bug.cgi?id=101411

        Reviewed by Oliver Hunt.

        Currently WeakBlocks use fastMalloc memory. They are very similar to the other HeapBlocks, however, 
        so we should change them to being allocated with the BlockAllocator.

        * heap/BlockAllocator.cpp:
        (JSC::BlockAllocator::BlockAllocator):
        * heap/BlockAllocator.h: Added a new RegionSet for WeakBlocks.
        (JSC):
        (BlockAllocator):
        (JSC::WeakBlock):
        * heap/Heap.h: Friended WeakSet to allow access to the BlockAllocator.
        (Heap):
        * heap/WeakBlock.cpp:
        (JSC::WeakBlock::create): Refactored to use HeapBlocks rather than fastMalloc.
        (JSC::WeakBlock::WeakBlock):
        * heap/WeakBlock.h: Changed the WeakBlock size to 4 KB so that it divides evenly into the Region size.
        (JSC):
        (WeakBlock):
        * heap/WeakSet.cpp:
        (JSC::WeakSet::~WeakSet):
        (JSC::WeakSet::addAllocator):

2012-11-07  Filip Pizlo  <fpizlo@apple.com>

        Indentation of ArgList.h is wrong
        https://bugs.webkit.org/show_bug.cgi?id=101441

        Reviewed by Andreas Kling.

        Just unindented by 4 spaces.

        * runtime/ArgList.h:

2012-11-07  Gabor Ballabas  <gaborb@inf.u-szeged.hu>

        [Qt][ARM] REGRESSION(r133688): It made all JSC and layout tests crash on ARM traditional platform
        https://bugs.webkit.org/show_bug.cgi?id=101465

        Reviewed by Oliver Hunt.

        Fix failing javascriptcore tests on ARM after r133688

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::CodeBlock):

2012-11-06  Oliver Hunt  <oliver@apple.com>

        Reduce parser overhead in JSC
        https://bugs.webkit.org/show_bug.cgi?id=101127

        Reviewed by Filip Pizlo.

        An exciting journey into the world of architecture in which our hero
        adds yet another layer to JSC codegeneration.

        This patch adds a marginally more compact form of bytecode that is
        free from any data specific to a given execution context, and that
        does store any data structures necessary for execution.  To actually
        execute this UnlinkedBytecode we still need to instantiate a real
        CodeBlock, but this is a much faster linear time operation than any
        of the earlier parsing or code generation passes.

        As the unlinked code is context free we can then simply use a cache
        from source to unlinked code mapping to completely avoid all of the
        old parser overhead.  The cache is currently very simple and memory
        heavy, using the complete source text as a key (rather than SourceCode
        or equivalent), and a random eviction policy.

        This seems to produce a substantial win when loading identical content
        in different contexts.

        * API/tests/testapi.c:
        (main):
        * CMakeLists.txt:
        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * bytecode/CodeBlock.cpp:
        * bytecode/CodeBlock.h:
            Moved a number of fields, and a bunch of logic to UnlinkedCodeBlock.h/cpp
        * bytecode/Opcode.h:
            Added a global const init no op instruction needed to get correct
            behaviour without any associated semantics.
        * bytecode/UnlinkedCodeBlock.cpp: Added.
        * bytecode/UnlinkedCodeBlock.h: Added.
            A fairly shallow, GC allocated version of the old CodeBlock
            classes with a 32bit instruction size, and just metadata
            size tracking.
        * bytecompiler/BytecodeGenerator.cpp:
        * bytecompiler/BytecodeGenerator.h:
            Replace direct access to m_symbolTable with access through
            symbolTable().  ProgramCode no longer has a symbol table at
            all so some previously unconditional (and pointless) uses
            of symbolTable get null checks.
            A few other changes to deal with type changes due to us generating
            unlinked code (eg. pointer free, so profile indices rather than
            pointers).
        * dfg/DFGByteCodeParser.cpp:
        * dfg/DFGCapabilities.h:
            Support global_init_nop        
        * interpreter/Interpreter.cpp:
            Now get the ProgramExecutable to initialise new global properties
            before starting execution.        
        * jit/JIT.cpp:
        * jit/JITDriver.h:
        * jit/JITStubs.cpp:
        * llint/LLIntData.cpp:
        * llint/LLIntSlowPaths.cpp:
        * llint/LowLevelInterpreter.asm:
        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm:
            Adding init_global_const_nop everywhere else
        * parser/Parser.h:
        * parser/ParserModes.h: Added.
        * parser/ParserTokens.h:
            Parser no longer needs a global object or callframe to function        
        * runtime/CodeCache.cpp: Added.
        * runtime/CodeCache.h: Added.
            A simple, random eviction, Source->UnlinkedCode cache        
        * runtime/Executable.cpp:
        * runtime/Executable.h:
            Executables now reference their unlinked counterparts, and
            request code specifically for the target global object.        
        * runtime/JSGlobalData.cpp:
        * runtime/JSGlobalData.h:
            GlobalData now owns a CodeCache and a set of new structures
            for the unlinked code types.  
        * runtime/JSGlobalObject.cpp:
        * runtime/JSGlobalObject.h:
            Utility functions used by executables to perform compilation
 
        * runtime/JSType.h:
          Add new JSTypes for unlinked code

2012-11-06  Michael Saboff  <msaboff@apple.com>

        JSStringCreateWithCFString() Should create an 8 bit String if possible
        https://bugs.webkit.org/show_bug.cgi?id=101104

        Reviewed by Darin Adler.

        Try converting the CFString to an 8 bit string using CFStringGetBytes(...,
        kCFStringEncodingISOLatin1, ...) and return the 8 bit string if successful.
        If not proceed with 16 bit conversion.

        * API/JSStringRefCF.cpp:
        (JSStringCreateWithCFString):

2012-11-06  Oliver Hunt  <oliver@apple.com>

        Reduce direct m_symbolTable usage in CodeBlock
        https://bugs.webkit.org/show_bug.cgi?id=101391

        Reviewed by Sam Weinig.

        Simple refactoring.

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::dump):
        (JSC::CodeBlock::dumpStatistics):
        (JSC::CodeBlock::nameForRegister):
        * bytecode/CodeBlock.h:
        (JSC::CodeBlock::isCaptured):

2012-11-06  Michael Saboff  <msaboff@apple.com>

        Lexer::scanRegExp, create 8 bit pattern and flag Identifiers from 16 bit source when possible
        https://bugs.webkit.org/show_bug.cgi?id=101013

        Reviewed by Darin Adler.

        Changed scanRegExp so that it will create 8 bit identifiers from 8 bit sources and from 16 bit sources
        whan all the characters are 8 bit.  Using two templated helpers, the "is all 8 bit" check is only performed
        on 16 bit sources.  The first helper is orCharacter() that will accumulate the or value of all characters
        only for 16 bit sources.  Replaced the helper Lexer::makeIdentifierSameType() with Lexer::makeRightSizedIdentifier().

        * parser/Lexer.cpp:
        (JSC::orCharacter<LChar>): Explicit template that serves as a placeholder.
        (JSC::orCharacter<UChar>): Explicit template that actually or accumulates characters.
        (JSC::Lexer::scanRegExp):
        * parser/Lexer.h:
        (Lexer):
        (JSC::Lexer::makeRightSizedIdentifier<LChar>): New template that always creates an 8 bit Identifier.
        (JSC::Lexer::makeRightSizedIdentifier<UChar>): New template that creates an 8 bit Identifier for 8 bit
        data in a 16 bit source.

2012-11-06  Filip Pizlo  <fpizlo@apple.com>

        Indentation of JSCell.h is wrong
        https://bugs.webkit.org/show_bug.cgi?id=101379

        Rubber stamped by Alexey Proskuryakov.

        Just removed four spaces on a bunch of lines.

        * runtime/JSCell.h:

2012-11-05  Filip Pizlo  <fpizlo@apple.com>

        Indentation of JSObject.h is wrong
        https://bugs.webkit.org/show_bug.cgi?id=101313

        Rubber stamped by Alexey Proskuryakov.

        Just unindented code, since namespace bodies shouldn't be indented.

        * runtime/JSObject.h:

2012-11-05  Filip Pizlo  <fpizlo@apple.com>

        Indentation of JSArray.h is wrong
        https://bugs.webkit.org/show_bug.cgi?id=101314

        Rubber stamped by Alexey Proskuryakov.

        Just removing the indentation inside the namespace body.

        * runtime/JSArray.h:

2012-11-05  Filip Pizlo  <fpizlo@apple.com>

        DFG should not fall down to patchable GetById just because a prototype had things added to it
        https://bugs.webkit.org/show_bug.cgi?id=101299

        Reviewed by Geoffrey Garen.

        This looks like a slight win on V8v7 and SunSpider.

        * bytecode/DFGExitProfile.h:
        (JSC::DFG::exitKindToString):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):

2012-11-05  Filip Pizlo  <fpizlo@apple.com>

        Get rid of method_check
        https://bugs.webkit.org/show_bug.cgi?id=101147

        Reviewed by Geoffrey Garen.

        op_method_check no longer buys us anything, since get_by_id proto caching
        gives just as much profiling information and the DFG inlines monomorphic
        proto accesses anyway.
        
        This also has the potential for a speed-up since it makes parsing of
        profiling data easier. No longer do we have to deal with the confusion of
        the get_by_id portion of a method_check appearing monomorphic even though
        we're really dealing with a bimorphic access (method_check specializes for
        one case and get_by_id for another).

        This looks like a 1% speed-up on both SunSpider and V8v7.

        * CMakeLists.txt:
        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * Target.pri:
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::printGetByIdCacheStatus):
        (JSC::CodeBlock::dump):
        (JSC::CodeBlock::finalizeUnconditionally):
        (JSC::CodeBlock::shrinkToFit):
        (JSC::CodeBlock::unlinkCalls):
        * bytecode/CodeBlock.h:
        (JSC::CodeBlock::getCallLinkInfo):
        (JSC::CodeBlock::callLinkInfo):
        (CodeBlock):
        * bytecode/GetByIdStatus.cpp:
        (JSC::GetByIdStatus::computeFromLLInt):
        * bytecode/MethodCallLinkInfo.cpp: Removed.
        * bytecode/MethodCallLinkInfo.h: Removed.
        * bytecode/MethodCallLinkStatus.cpp: Removed.
        * bytecode/MethodCallLinkStatus.h: Removed.
        * bytecode/Opcode.h:
        (JSC):
        (JSC::padOpcodeName):
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC):
        * bytecompiler/BytecodeGenerator.h:
        (BytecodeGenerator):
        * bytecompiler/NodesCodegen.cpp:
        (JSC::FunctionCallDotNode::emitBytecode):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::parseBlock):
        * dfg/DFGCapabilities.h:
        (JSC::DFG::canCompileOpcode):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompileMainPass):
        (JSC::JIT::privateCompileSlowCases):
        (JSC::PropertyStubCompilationInfo::copyToStubInfo):
        (JSC::JIT::privateCompile):
        * jit/JIT.h:
        (JSC::PropertyStubCompilationInfo::slowCaseInfo):
        (PropertyStubCompilationInfo):
        (JSC):
        (JIT):
        * jit/JITPropertyAccess.cpp:
        (JSC):
        (JSC::JIT::emitSlow_op_get_by_id):
        (JSC::JIT::compileGetByIdSlowCase):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC):
        (JSC::JIT::compileGetByIdSlowCase):
        * jit/JITStubs.cpp:
        (JSC):
        * jit/JITStubs.h:
        * llint/LowLevelInterpreter.asm:

2012-11-05  Yuqiang Xian  <yuqiang.xian@intel.com>

        Refactor LLInt64 to distinguish the pointer operations from the 64-bit integer operations
        https://bugs.webkit.org/show_bug.cgi?id=100321

        Reviewed by Filip Pizlo.

        We have refactored the MacroAssembler and JIT compilers to distinguish
        the pointer operations from the 64-bit integer operations (see bug #99154).
        Now we want to do the similar work for LLInt, and the goal is same as
        the one mentioned in 99154.

        This is the second part of the modification: in the low level interpreter,
        changing the operations on 64-bit integers to use the "<foo>q" instructions.
        This also removes some unused/meaningless "<foo>p" instructions.

        * llint/LowLevelInterpreter.asm:
        * llint/LowLevelInterpreter.cpp:
        (JSC::CLoop::execute):
        * llint/LowLevelInterpreter64.asm:
        * offlineasm/armv7.rb:
        * offlineasm/cloop.rb:
        * offlineasm/instructions.rb:
        * offlineasm/x86.rb:

2012-11-05  Filip Pizlo  <fpizlo@apple.com>

        Prototype chain caching should check that the path from the base object to the slot base involves prototype hops only
        https://bugs.webkit.org/show_bug.cgi?id=101276

        Reviewed by Gavin Barraclough.

        Changed normalizePrototypeChain() to report an invalid prototype chain if any object is a proxy.
        This catches cases where our prototype chain checks would have been insufficient to guard against
        newly introduced properties, despecialized properties, or deleted properties in the chain of
        objects involved in the access.

        * dfg/DFGRepatch.cpp:
        (JSC::DFG::tryCacheGetByID):
        (JSC::DFG::tryBuildGetByIDProtoList):
        (JSC::DFG::tryCachePutByID):
        (JSC::DFG::tryBuildPutByIdList):
        * jit/JITStubs.cpp:
        (JSC::JITThunks::tryCachePutByID):
        (JSC::JITThunks::tryCacheGetByID):
        (JSC::DEFINE_STUB_FUNCTION):
        * llint/LLIntSlowPaths.cpp:
        (JSC::LLInt::LLINT_SLOW_PATH_DECL):
        * runtime/Operations.h:
        (JSC):
        (JSC::normalizePrototypeChain):

2012-11-05  Dima Gorbik  <dgorbik@apple.com>

        Back out controversial changes from Bug 98665.
        https://bugs.webkit.org/show_bug.cgi?id=101244

        Reviewed by David Kilzer.

        Backing out changes from Bug 98665 until further discussions take place on rules for including Platform.h in Assertions.h.

        * API/tests/minidom.c:
        * API/tests/testapi.c:

2012-11-04  Filip Pizlo  <fpizlo@apple.com>

        Reduce the verbosity of referring to QNaN in JavaScriptCore
        https://bugs.webkit.org/show_bug.cgi?id=101174

        Reviewed by Geoffrey Garen.

        Introduces a #define QNaN in JSValue.h, and replaces all previous uses of
        std::numeric_limits<double>::quiet_NaN() with QNaN.

        * API/JSValueRef.cpp:
        (JSValueMakeNumber):
        (JSValueToNumber):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::compileGetByValOnFloatTypedArray):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emitFloatTypedArrayGetByVal):
        * runtime/CachedTranscendentalFunction.h:
        (JSC::CachedTranscendentalFunction::initialize):
        * runtime/DateConstructor.cpp:
        (JSC::constructDate):
        * runtime/DateInstanceCache.h:
        (JSC::DateInstanceData::DateInstanceData):
        (JSC::DateInstanceCache::reset):
        * runtime/ExceptionHelpers.cpp:
        (JSC::InterruptedExecutionError::defaultValue):
        (JSC::TerminatedExecutionError::defaultValue):
        * runtime/JSCell.h:
        (JSC::JSValue::getPrimitiveNumber):
        * runtime/JSDateMath.cpp:
        (JSC::parseDateFromNullTerminatedCharacters):
        * runtime/JSGlobalData.cpp:
        (JSC::JSGlobalData::JSGlobalData):
        (JSC::JSGlobalData::resetDateCache):
        * runtime/JSGlobalObjectFunctions.cpp:
        (JSC::parseInt):
        (JSC::jsStrDecimalLiteral):
        (JSC::toDouble):
        (JSC::jsToNumber):
        (JSC::parseFloat):
        * runtime/JSValue.cpp:
        (JSC::JSValue::toNumberSlowCase):
        * runtime/JSValue.h:
        (JSC):
        * runtime/JSValueInlineMethods.h:
        (JSC::jsNaN):
        * runtime/MathObject.cpp:
        (JSC::mathProtoFuncMax):
        (JSC::mathProtoFuncMin):

2012-11-03  Filip Pizlo  <fpizlo@apple.com>

        Baseline JIT should use structure watchpoints whenever possible
        https://bugs.webkit.org/show_bug.cgi?id=101146

        Reviewed by Sam Weinig.

        No speed-up yet except on toy programs. I think that it will start to show
        speed-ups with https://bugs.webkit.org/show_bug.cgi?id=101147, which this is
        a step towards.

        * jit/JIT.h:
        (JIT):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::privateCompilePutByIdTransition):
        (JSC::JIT::privateCompileGetByIdProto):
        (JSC::JIT::privateCompileGetByIdProtoList):
        (JSC::JIT::privateCompileGetByIdChainList):
        (JSC::JIT::privateCompileGetByIdChain):
        (JSC::JIT::addStructureTransitionCheck):
        (JSC):
        (JSC::JIT::testPrototype):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::privateCompilePutByIdTransition):
        (JSC::JIT::privateCompileGetByIdProto):
        (JSC::JIT::privateCompileGetByIdProtoList):
        (JSC::JIT::privateCompileGetByIdChainList):
        (JSC::JIT::privateCompileGetByIdChain):

2012-11-04  Csaba Osztrogonác  <ossy@webkit.org>

        [Qt] udis86_itab.c is always regenerated
        https://bugs.webkit.org/show_bug.cgi?id=100756

        Reviewed by Simon Hausmann.

        * DerivedSources.pri: Generate sources to the generated directory.
        * disassembler/udis86/differences.txt:
        * disassembler/udis86/itab.py: Add --outputDir option.
        (UdItabGenerator.__init__):
        (genItabH):
        (genItabC):
        (main):

2012-11-02  Filip Pizlo  <fpizlo@apple.com>

        LLInt 32-bit put_by_val ArrayStorage case should use the right register (t3, not t2) for the index in the publicLength updating path
        https://bugs.webkit.org/show_bug.cgi?id=101118

        Reviewed by Gavin Barraclough.

        * llint/LowLevelInterpreter32_64.asm:

2012-11-02  Filip Pizlo  <fpizlo@apple.com>

        DFG::Node::converToStructureTransitionWatchpoint should take kindly to ArrayifyToStructure
        https://bugs.webkit.org/show_bug.cgi?id=101117

        Reviewed by Gavin Barraclough.

        We have logic to convert ArrayifyToStructure to StructureTransitionWatchpoint, which is awesome, except
        that previously convertToStructureTransitionWatchpoint was (a) asserting that it never saw an
        ArrayifyToStructure and (b) would incorrectly create a ForwardStructureTransitionWatchpoint if it did.

        * dfg/DFGNode.h:
        (JSC::DFG::Node::convertToStructureTransitionWatchpoint):

2012-11-02  Filip Pizlo  <fpizlo@apple.com>

        DFG::SpeculativeJIT::typedArrayDescriptor should use the Float64Array descriptor for Float64Arrays
        https://bugs.webkit.org/show_bug.cgi?id=101114

        Reviewed by Gavin Barraclough.

        As in https://bugs.webkit.org/show_bug.cgi?id=101112, this was only wrong when Float64Array descriptors
        hadn't been initialized yet. That happens rarely, but when it does happen, we would crash.
        
        This would also become much more wrong if we ever put type size info (num bytes, etc) in the descriptor
        and used that directly. So it's good to fix it.

        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::typedArrayDescriptor):

2012-11-02  Filip Pizlo  <fpizlo@apple.com>

        JIT::privateCompileGetByVal should use the uint8ClampedArrayDescriptor for compiling accesses to Uint8ClampedArrays
        https://bugs.webkit.org/show_bug.cgi?id=101112

        Reviewed by Gavin Barraclough.

        The only reason why the code was wrong to use uint8ArrayDescriptor instead is that if we're just using
        Uint8ClampedArrays then the descriptor for Uint8Array may not have been initialized.

        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::privateCompileGetByVal):

2012-11-02  Mark Hahnenberg  <mhahnenberg@apple.com>

        MarkedBlocks should use something other than the mark bits to indicate liveness for newly allocated objects
        https://bugs.webkit.org/show_bug.cgi?id=100877

        Reviewed by Filip Pizlo.

        Currently when we canonicalize cell liveness data in MarkedBlocks, we set the mark bit for every cell in the 
        block except for those in the free list. This allows us to consider objects that were allocated since the 
        previous collection to be considered live until they have a chance to be properly marked by the collector.

        If we want to use the mark bits to signify other types of information, e.g. using sticky mark bits for generational 
        collection, we will have to keep track of newly allocated objects in a different fashion when we canonicalize cell liveness.

        One method would be to allocate a separate set of bits while canonicalizing liveness data. These bits would 
        track the newly allocated objects in the block separately from those objects who had already been marked. We would 
        then check these bits, along with the mark bits, when determining liveness. 

        * heap/Heap.h:
        (Heap):
        (JSC::Heap::isLive): We now check for the presence of the newlyAllocated Bitmap.
        (JSC):
        * heap/MarkedBlock.cpp:
        (JSC::MarkedBlock::specializedSweep): We clear the newlyAllocated Bitmap if we're creating a free list. This 
        will happen if we canonicalize liveness data for some other reason than collection (e.g. forEachCell) and 
        then start allocating again.
        (JSC::SetNewlyAllocatedFunctor::SetNewlyAllocatedFunctor): 
        (SetNewlyAllocatedFunctor):
        (JSC::SetNewlyAllocatedFunctor::operator()): We set the newlyAllocated bits for all the objects 
        that aren't already marked. We undo the bits for the objects in the free list later in canonicalizeCellLivenessData.
        (JSC::MarkedBlock::canonicalizeCellLivenessData): We should never have a FreeListed block with a newlyAllocated Bitmap.
        We allocate the new Bitmap, set the bits for all the objects that aren't already marked, and then unset all of the 
        bits for the items currently in the FreeList.
        * heap/MarkedBlock.h:
        (JSC::MarkedBlock::clearMarks): We clear the newlyAllocated bitmap if it exists because at this point we don't need it
        any more.
        (JSC::MarkedBlock::isEmpty): If we have some objects that are newlyAllocated, we are not empty.
        (JSC::MarkedBlock::isNewlyAllocated): 
        (JSC):
        (JSC::MarkedBlock::setNewlyAllocated):
        (JSC::MarkedBlock::clearNewlyAllocated):
        (JSC::MarkedBlock::isLive): We now check the newlyAllocated Bitmap, if it exists, when determining liveness of a cell in 
        a block that is Marked.
        * heap/WeakBlock.cpp:
        (JSC::WeakBlock::visit): We need to make sure we don't finalize objects that are in the newlyAllocated Bitmap.
        (JSC::WeakBlock::reap): Ditto.

2012-11-02  Filip Pizlo  <fpizlo@apple.com>

        JIT::privateCompileGetByVal should use MacroAssemblerCodePtr::createFromExecutableAddress like JIT::privateCompilePutByVal
        https://bugs.webkit.org/show_bug.cgi?id=101109

        Reviewed by Gavin Barraclough.

        This fixes crashes on ARMv7 resulting from the return address already being tagged with the THUMB2 bit.

        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::privateCompileGetByVal):

2012-11-02  Simon Fraser  <simon.fraser@apple.com>

        Enable SUBPIXEL_LAYOUT on Mac
        https://bugs.webkit.org/show_bug.cgi?id=101076

        Reviewed by Dave Hyatt.

        Define ENABLE_SUBPIXEL_LAYOUT and include it in FEATURE_DEFINES.

        * Configurations/FeatureDefines.xcconfig:

2012-11-02  Michael Saboff  <msaboff@apple.com>

        RegExp.prototype.toString Should Produce an 8 bit JSString if possible.
        https://bugs.webkit.org/show_bug.cgi?id=101003

        Reviewed by Geoffrey Garen.

        Took the logic of regExpObjectSource() and created two templated helpers that uses the
        source character type when appending to the StringBuilder.

        * runtime/RegExpObject.cpp:
        (JSC::appendLineTerminatorEscape): Checks line terminate type to come up with escaped version.
        (JSC::regExpObjectSourceInternal): Templated version of original.
        (JSC::regExpObjectSource): Wrapper function.

2012-11-02  Adam Barth  <abarth@webkit.org>

        ENABLE(UNDO_MANAGER) is disabled everywhere and is not under active development
        https://bugs.webkit.org/show_bug.cgi?id=100711

        Reviewed by Eric Seidel.

        * Configurations/FeatureDefines.xcconfig:

2012-11-02  Simon Hausmann  <simon.hausmann@digia.com>

        [Qt] Fix build on Windows when Qt is configured with -release
        https://bugs.webkit.org/show_bug.cgi?id=101041

        Reviewed by Jocelyn Turcotte.

        When Qt is configured with -debug or -release, the release/debug build of for example
        QtCore is not available by default. For LLIntExtractor we always need to build debug
        _and_ release versions, but we do not actually need any Qt libraries nor qtmain(d).lib.
        Therefore we can disable all these features but need to keep $$QT.core.includes in the
        INCLUDEPATH for some defines from qglobal.h.

        * LLIntOffsetsExtractor.pro:

2012-11-01  Mark Lam  <mark.lam@apple.com>

        A llint workaround for a toolchain issue.
        https://bugs.webkit.org/show_bug.cgi?id=101012.

        Reviewed by Michael Saboff.

        * llint/LowLevelInterpreter.asm:
          - use a local label to workaround the toolchain issue with undeclared
            global labels.

2012-11-01  Oliver Hunt  <oliver@apple.com>

        Remove GlobalObject constant register that is typically unused
        https://bugs.webkit.org/show_bug.cgi?id=101005

        Reviewed by Geoffrey Garen.

        The GlobalObject constant register is frequently allocated even when it
        is not used, it is also getting in the way of some other optimisations.

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::CodeBlock):
        * bytecode/CodeBlock.h:
        (CodeBlock):
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::BytecodeGenerator::BytecodeGenerator):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::parseResolveOperations):

2012-10-31  Filip Pizlo  <fpizlo@apple.com>

        DFG optimized string access code should be enabled
        https://bugs.webkit.org/show_bug.cgi?id=100825

        Reviewed by Oliver Hunt.

        - Removes prediction checks from the parser.
        
        - Fixes the handling of array mode refinement for strings. I.e. we don't do
          any refinement - we already know it's going to be a string. We could
          revisit this in the future, but for now the DFG lacks the ability to
          handle any array modes other than Array::String for string intrinsics, so
          this is as good as it gets.
        
        - Removes uses of isBlahSpeculation for checking if a mode is already
          checked. isBlahSpeculation implicitly checks if the SpeculatedType is not
          BOTTOM ("empty"), which breaks for checking if a mode is already checked
          since a mode may already be "checked" in the sense that we've proven that
          the code is unreachable.
        
        ~1% speed-up on V8v7, mostly from a speed-up on crypto, which uses string
        intrinsics in one of the hot functions.

        * bytecode/SpeculatedType.h:
        (JSC::speculationChecked):
        (JSC):
        * dfg/DFGArrayMode.cpp:
        (JSC::DFG::ArrayMode::alreadyChecked):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::handleIntrinsic):
        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::fixupNode):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::compileGetCharCodeAt):

2012-10-31  Filip Pizlo  <fpizlo@apple.com>

        Sparse array size threshold should be increased to 100000
        https://bugs.webkit.org/show_bug.cgi?id=100827

        Reviewed by Oliver Hunt.

        This enables the use of contiguous arrays in programs that previously
        couldn't use them. And I so far can't see any examples of this being
        a downside. To the extent that there is a downside, it ought to be
        addressed by GC: https://bugs.webkit.org/show_bug.cgi?id=100828

        * runtime/ArrayConventions.h:
        (JSC):

2012-10-31  Mark Lam  <mark.lam@apple.com>

        C++ llint 64-bit backend needs to zero extend results of int32 operations.
        https://bugs.webkit.org/show_bug.cgi?id=100899.

        Reviewed by Filip Pizlo.

        llint asm instructions ending in "i" for a 64-bit machine expects the
        high 32-bit of registers to be zero'ed out when a 32-bit instruction
        writes into a register. Fixed the C++ llint to honor this.

        Fixed the index register used in BaseIndex addressing to be of size
        intptr_t as expected.

        Updated CLoopRegister to handle different endiannesss configurations.

        * llint/LowLevelInterpreter.cpp:
        (JSC::CLoopRegister::clearHighWord):
          - new method to clear the high 32-bit of a 64-bit register.
            It's a no-op for the 32-bit build. 
        (CLoopRegister):
          - CLoopRegister now takes care of packing and byte endianness order.
        (JSC::CLoop::execute): - Added an assert.
        * offlineasm/cloop.rb:
          - Add calls to clearHighWord() wherever needed.

2012-10-31  Mark Lam  <mark.lam@apple.com>

        A JSC printf (support for %J+s and %b).
        https://bugs.webkit.org/show_bug.cgi?id=100566.

        Reviewed by Michael Saboff.

        Added VMInspector::printf(), fprintf(), sprintf(), and snprintf().
        - %b prints ints as boolean TRUE (non-zero) or FALSE (zero).
        - %Js prints a WTF::String* like a %s prints a char*.
          Also works for 16bit WTF::Strings (prints wchar_t* using %S).
        - '+' is a modifier meaning 'use verbose mode', and %J+s is an example
          of its use.

        * JavaScriptCore.xcodeproj/project.pbxproj:
        * interpreter/VMInspector.cpp:
        (FormatPrinter):
        (JSC::FormatPrinter::~FormatPrinter):
        (JSC::FormatPrinter::print):
        (JSC::FormatPrinter::printArg):
        (JSC::FormatPrinter::printWTFString):
        (JSC::FileFormatPrinter::FileFormatPrinter):
        (JSC::FileFormatPrinter::printArg):
        (JSC::StringFormatPrinter::StringFormatPrinter):
        (JSC::StringFormatPrinter::printArg):
        (JSC::StringNFormatPrinter::StringNFormatPrinter):
        (JSC::StringNFormatPrinter::printArg):
        (JSC::VMInspector::fprintf):
        (JSC::VMInspector::printf):
        (JSC::VMInspector::sprintf):
        (JSC::VMInspector::snprintf):
        * interpreter/VMInspector.h:
        (VMInspector):

2012-10-31  Mark Lam  <mark.lam@apple.com>

        64-bit llint PC offset can be negative: using an unsigned shift is a bug.
        https://bugs.webkit.org/show_bug.cgi?id=100896.

        Reviewed by Filip Pizlo.

        Fixed the PC offset divisions in the 64-bit llint asm to use rshift instead of urshift.

        * llint/LowLevelInterpreter64.asm:

2012-10-30  Yuqiang Xian  <yuqiang.xian@intel.com>

        glsl-function-atan.html WebGL conformance test fails after https://bugs.webkit.org/show_bug.cgi?id=99154
        https://bugs.webkit.org/show_bug.cgi?id=100789

        Reviewed by Filip Pizlo.

        We accidently missed a bitwise double to int64 conversion.

        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::silentFill):

2012-10-30  Joseph Pecoraro  <pecoraro@apple.com>

        [Mac] Sync up FeatureDefine Configuration Files
        https://bugs.webkit.org/show_bug.cgi?id=100171

        Reviewed by David Kilzer.

        Follow up to better coordinate with iOS feature defines. Make:

          - ENABLE_FILTERS always on
          - ENABLE_INPUT_* iphonesimulator values point to the iphoneos values

        * Configurations/FeatureDefines.xcconfig:

2012-10-30  Joseph Pecoraro  <pecoraro@apple.com>

        [Mac] Sync up FeatureDefine Configuration Files
        https://bugs.webkit.org/show_bug.cgi?id=100171

        Reviewed by David Kilzer.

        Ensure an identical FeatureDefine files across all projects. Changes:

          - ENABLE_CSS_BOX_DECORATION_BREAK should be in all
          - ENABLE_PDFKIT_PLUGIN should be in all
          - ENABLE_RESOLUTION_MEDIA_QUERY should be in all
          - ENABLE_ENCRYPTED_MEDIA should be in all
          - ENABLE_HIDDEN_PAGE_DOM_TIMER_THROTTLING with corrected value
          - Some alphabetical ordering cleanup

        * Configurations/FeatureDefines.xcconfig:

2012-10-30  Mark Hahnenberg  <mhahnenberg@apple.com>

        Arrays can change IndexingType in the middle of sorting
        https://bugs.webkit.org/show_bug.cgi?id=100773

        Reviewed by Filip Pizlo.

        Instead of giving up, we just fetch the appropriate vector based on the current 
        IndexingType of the array.

        * runtime/JSArray.cpp:
        (JSC::JSArray::sortVector):
        * runtime/JSObject.h:
        (JSObject):
        (JSC::JSObject::currentIndexingData):
        (JSC::JSObject::currentRelevantLength):

2012-10-29  Anders Carlsson  <andersca@apple.com>

        Build WebKit as C++11 on Mac
        https://bugs.webkit.org/show_bug.cgi?id=100720

        Reviewed by Daniel Bates.

        * Configurations/Base.xcconfig:
        Add CLANG_CXX_LANGUAGE_STANDARD=gnu++0x.

        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::BytecodeGenerator::generate):
        (JSC::BytecodeGenerator::pushFinallyContext):
        (JSC::BytecodeGenerator::beginSwitch):
        * llint/LLIntOffsetsExtractor.cpp:
        * runtime/Identifier.cpp:
        (JSC::Identifier::add8):
        * runtime/Identifier.h:
        (JSC::Identifier::add):
        * runtime/JSONObject.cpp:
        (JSC::appendStringToStringBuilder):
        * runtime/StringPrototype.cpp:
        (JSC::replaceUsingStringSearch):
        Add static_casts to prevent implicit type conversions in non-constant initializer lists.

2012-10-28  Mark Rowe  <mrowe@apple.com>

        Simplify Xcode configuration settings that used to vary between OS versions.

        Reviewed by Dan Bernstein.

        * Configurations/Base.xcconfig:
        * Configurations/DebugRelease.xcconfig:
        * Configurations/JavaScriptCore.xcconfig:

2012-10-28  Mark Rowe  <mrowe@apple.com>

        Remove references to unsupported OS and Xcode versions.

        Reviewed by Anders Carlsson.

        * Configurations/Base.xcconfig:
        * Configurations/CompilerVersion.xcconfig: Removed.
        * Configurations/DebugRelease.xcconfig:
        * Configurations/Version.xcconfig:
        * JavaScriptCore.xcodeproj/project.pbxproj:

2012-10-29  Michael Saboff  <msaboff@apple.com>

        Non-special escape character sequences cause JSC::Lexer::parseString to create 16 bit strings
        https://bugs.webkit.org/show_bug.cgi?id=100576

        Reviewed by Darin Adler.

        Changed singleEscape() processing to be based on a lookup of a static table.  The table
        covers ASCII characters SPACE through DEL.  If a character can be a single character escape,
        then the table provides the non-zero result of that escape.  Updated the result of
        singleEscape to be an LChar to make the table as small as possible.
        Added a new test fast/js/normal-character-escapes-in-string-literals.html to validated
        the behavior.

        * parser/Lexer.cpp:
        (JSC::singleEscape):
        (JSC::Lexer::parseString):
        (JSC::Lexer::parseStringSlowCase):

2012-10-29  Enrica Casucci  <enrica@apple.com>

        Add ENABLE_USERSELECT_ALL feature flag.
        https://bugs.webkit.org/show_bug.cgi?id=100559

        Reviewed by Eric Seidel.

        * Configurations/FeatureDefines.xcconfig:

2012-10-28  Filip Pizlo  <fpizlo@apple.com>

        DFG should be able to emit effectful structure checks
        https://bugs.webkit.org/show_bug.cgi?id=99260

        Reviewed by Oliver Hunt.

        This change allows us to find out if an array access that has gone polymorphic
        is operating over known structures - i.e. the primordial array structures of the
        global object that the code block containing the array access belongs to. We
        term this state "OriginalArray" for short. The fact that the access has gone
        polymorphic means that the array profile will not be able to report the set of
        structures it had seen - but if it can tell us that all of the structures were
        primordial then it just so happens that we can deduce what the structure set
        would have been by just querying the code block's global object. This allows us
        to emit an ArrayifyToStructure instead of an Arrayify if we find that we need to
        do conversions. The fast path of an ArrayifyToStructure is exactly like the fast
        path of a CheckStructure and is mostly subject to the same optimizations. It
        also burns one fewer registers.
        
        Essentially the notion of OriginalArray is a super cheap way of getting the
        array profile to tell us a structure set instead of a singleton structure.
        Currently, the array profile can only tell us the structure seen at an array
        access if there was exactly one structure. If there were multiple structures, it
        won't tell us anything other than the array modes and other auxiliary profiling
        data (whether there were stores to holes, for example). With OriginalArray, we
        cheaply get a structure set if all of the structures were primordial for the
        code block's global object, since in that case the array mode set (ArrayModes)
        can directly tell us the structure set. In the future, we might consider adding
        complete structure sets to the array profiles, but I suspect that we would hit
        diminishing returns if we did so - it would only help if we have array accesses
        that are both polymorphic and are cross-global-object accesses (rare) or if the
        arrays had named properties or other structure transitions that are unrelated to
        indexing type (also rare).
        
        This also does away with Arrayify (and the new ArrayifyToStructure) returning
        the butterfly pointer. This turns out to be faster and easier to CSE.
        
        And, this also changes constant folding to be able to eliminate CheckStructure,
        ForwardCheckStructure, and ArrayifyToStructure in addition to being able to
        transform them into structure transition watchpoints. This is great for
        ArrayifyToStructure because then CSE and CFA know that there is no side effect.
        Converting CheckStructure and ForwardCheckStructure to also behave this way is
        just a matter of elegance.
        
        This has no performance impact right now. It's intended to alleviate some of the
        regressions seen in the early implementation of
        https://bugs.webkit.org/show_bug.cgi?id=98606.

        * bytecode/ArrayProfile.cpp:
        (JSC::ArrayProfile::computeUpdatedPrediction):
        * bytecode/ArrayProfile.h:
        (JSC):
        (JSC::ArrayProfile::ArrayProfile):
        (ArrayProfile):
        (JSC::ArrayProfile::usesOriginalArrayStructures):
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::updateAllPredictionsAndCountLiveness):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGArrayMode.cpp:
        (JSC::DFG::ArrayMode::fromObserved):
        (JSC::DFG::ArrayMode::alreadyChecked):
        (JSC::DFG::arrayClassToString):
        * dfg/DFGArrayMode.h:
        (JSC::DFG::ArrayMode::withProfile):
        (JSC::DFG::ArrayMode::isJSArray):
        (ArrayMode):
        (JSC::DFG::ArrayMode::isJSArrayWithOriginalStructure):
        (JSC::DFG::ArrayMode::supportsLength):
        (JSC::DFG::ArrayMode::arrayModesWithIndexingShape):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::getArrayMode):
        (JSC::DFG::ByteCodeParser::getArrayModeAndEmitChecks):
        (JSC::DFG::ByteCodeParser::handleGetByOffset):
        * dfg/DFGCSEPhase.cpp:
        (JSC::DFG::CSEPhase::checkStructureElimination):
        (JSC::DFG::CSEPhase::structureTransitionWatchpointElimination):
        (JSC::DFG::CSEPhase::getPropertyStorageLoadElimination):
        (JSC::DFG::CSEPhase::checkArrayElimination):
        (JSC::DFG::CSEPhase::getScopeRegistersLoadElimination):
        * dfg/DFGConstantFoldingPhase.cpp:
        (JSC::DFG::ConstantFoldingPhase::foldConstants):
        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::fixupNode):
        (JSC::DFG::FixupPhase::checkArray):
        * dfg/DFGNode.h:
        (JSC::DFG::Node::hasStructure):
        (JSC::DFG::Node::hasArrayMode):
        (JSC::DFG::Node::arrayMode):
        * dfg/DFGNodeType.h:
        (DFG):
        * dfg/DFGPredictionPropagationPhase.cpp:
        (JSC::DFG::PredictionPropagationPhase::propagate):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::jumpSlowForUnwantedArrayMode):
        (JSC::DFG::SpeculativeJIT::arrayify):
        * dfg/DFGSpeculativeJIT.h:
        (SpeculativeJIT):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * runtime/JSGlobalObject.h:
        (JSC::JSGlobalObject::isOriginalArrayStructure):
        * runtime/Structure.cpp:
        (JSC::Structure::nonPropertyTransition):

2012-10-28  Filip Pizlo  <fpizlo@apple.com>

        There should not be blind spots in array length array profiling
        https://bugs.webkit.org/show_bug.cgi?id=100620

        Reviewed by Oliver Hunt.

        I don't think this has any performance impact. But it's good to not have random
        programs occasionally emit a GetById for array length accesses.

        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::compileGetByIdHotPath):
        (JSC::JIT::privateCompilePatchGetArrayLength):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::compileGetByIdHotPath):
        (JSC::JIT::privateCompilePatchGetArrayLength):

2012-10-28  Filip Pizlo  <fpizlo@apple.com>

        Unreviewed, make always-true enum-to-int comparisons use casts.

        * dfg/DFGFPRInfo.h:
        (JSC::DFG::FPRInfo::debugName):
        * dfg/DFGGPRInfo.h:
        (JSC::DFG::JSValueSource::tagGPR):
        (JSC::DFG::GPRInfo::toIndex):
        (JSC::DFG::GPRInfo::debugName):
        * runtime/JSTypeInfo.h:
        (JSC::TypeInfo::TypeInfo):

2012-10-27  Filip Pizlo  <fpizlo@apple.com>

        OSR exit compilation should defend against argument recoveries from code blocks that are no longer on the inline stack
        https://bugs.webkit.org/show_bug.cgi?id=100601

        Reviewed by Oliver Hunt.

        This happened to me while I was fixing bugs for https://bugs.webkit.org/show_bug.cgi?id=100599.
        I'm not sure how to reproduce this.

        * dfg/DFGAssemblyHelpers.h:
        (JSC::DFG::AssemblyHelpers::baselineCodeBlockFor):
        (AssemblyHelpers):
        * dfg/DFGOSRExitCompiler32_64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):

2012-10-27  Filip Pizlo  <fpizlo@apple.com>

        DFG::Array::Mode needs to be cleaned up
        https://bugs.webkit.org/show_bug.cgi?id=100599

        Reviewed by Oliver Hunt.

        Turn the previous massive Array::Mode enum into a class that contains four
        fields, the type, whether it's a JSArray, the level of speculation, and the
        kind of conversion to perform.
        
        No performance or behavioral change.

        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGArgumentsSimplificationPhase.cpp:
        (JSC::DFG::ArgumentsSimplificationPhase::run):
        * dfg/DFGArrayMode.cpp:
        (JSC::DFG::ArrayMode::fromObserved):
        (JSC::DFG::ArrayMode::refine):
        (JSC::DFG::ArrayMode::alreadyChecked):
        (JSC::DFG::arrayTypeToString):
        (JSC::DFG::arrayClassToString):
        (DFG):
        (JSC::DFG::arraySpeculationToString):
        (JSC::DFG::arrayConversionToString):
        (JSC::DFG::ArrayMode::toString):
        * dfg/DFGArrayMode.h:
        (DFG):
        (ArrayMode):
        (JSC::DFG::ArrayMode::ArrayMode):
        (JSC::DFG::ArrayMode::type):
        (JSC::DFG::ArrayMode::arrayClass):
        (JSC::DFG::ArrayMode::speculation):
        (JSC::DFG::ArrayMode::conversion):
        (JSC::DFG::ArrayMode::asWord):
        (JSC::DFG::ArrayMode::fromWord):
        (JSC::DFG::ArrayMode::withSpeculation):
        (JSC::DFG::ArrayMode::usesButterfly):
        (JSC::DFG::ArrayMode::isJSArray):
        (JSC::DFG::ArrayMode::isInBounds):
        (JSC::DFG::ArrayMode::mayStoreToHole):
        (JSC::DFG::ArrayMode::isOutOfBounds):
        (JSC::DFG::ArrayMode::isSlowPut):
        (JSC::DFG::ArrayMode::canCSEStorage):
        (JSC::DFG::ArrayMode::lengthNeedsStorage):
        (JSC::DFG::ArrayMode::modeForPut):
        (JSC::DFG::ArrayMode::isSpecific):
        (JSC::DFG::ArrayMode::supportsLength):
        (JSC::DFG::ArrayMode::benefitsFromStructureCheck):
        (JSC::DFG::ArrayMode::doesConversion):
        (JSC::DFG::ArrayMode::arrayModesThatPassFiltering):
        (JSC::DFG::ArrayMode::operator==):
        (JSC::DFG::ArrayMode::operator!=):
        (JSC::DFG::ArrayMode::arrayModesWithIndexingShape):
        (JSC::DFG::canCSEStorage):
        (JSC::DFG::lengthNeedsStorage):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::getArrayMode):
        (JSC::DFG::ByteCodeParser::getArrayModeAndEmitChecks):
        (JSC::DFG::ByteCodeParser::handleIntrinsic):
        (JSC::DFG::ByteCodeParser::parseBlock):
        * dfg/DFGCSEPhase.cpp:
        (JSC::DFG::CSEPhase::getArrayLengthElimination):
        (JSC::DFG::CSEPhase::checkArrayElimination):
        (JSC::DFG::CSEPhase::getIndexedPropertyStorageLoadElimination):
        (JSC::DFG::CSEPhase::performNodeCSE):
        * dfg/DFGConstantFoldingPhase.cpp:
        (JSC::DFG::ConstantFoldingPhase::foldConstants):
        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::fixupNode):
        (JSC::DFG::FixupPhase::checkArray):
        (JSC::DFG::FixupPhase::blessArrayOperation):
        * dfg/DFGGraph.cpp:
        (JSC::DFG::Graph::dump):
        * dfg/DFGGraph.h:
        (JSC::DFG::Graph::byValIsPure):
        * dfg/DFGNode.h:
        (JSC::DFG::Node::arrayMode):
        (JSC::DFG::Node::setArrayMode):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::typedArrayDescriptor):
        (JSC::DFG::SpeculativeJIT::jumpSlowForUnwantedArrayMode):
        (JSC::DFG::SpeculativeJIT::checkArray):
        (JSC::DFG::SpeculativeJIT::arrayify):
        (JSC::DFG::SpeculativeJIT::compileGetByValOnString):
        (JSC::DFG::SpeculativeJIT::compileGetByValOnIntTypedArray):
        (JSC::DFG::SpeculativeJIT::compileGetByValOnFloatTypedArray):
        (JSC::DFG::SpeculativeJIT::compilePutByValForFloatTypedArray):
        (JSC::DFG::SpeculativeJIT::compileGetIndexedPropertyStorage):
        (JSC::DFG::SpeculativeJIT::compileGetByValOnArguments):
        (JSC::DFG::SpeculativeJIT::compileGetArgumentsLength):
        (JSC::DFG::SpeculativeJIT::compileGetArrayLength):
        (JSC::DFG::SpeculativeJIT::temporaryRegisterForPutByVal):
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::putByValWillNeedExtraRegister):
        (SpeculativeJIT):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):

2012-10-27  Dan Bernstein  <mitz@apple.com>

        REAL_PLATFORM_NAME build setting is no longer needed
        https://bugs.webkit.org/show_bug.cgi?id=100587

        Reviewed by Mark Rowe.

        Removed the definition of REAL_PLATFORM_NAME and replaced references to it with references
        to PLATFORM_NAME.

        * Configurations/Base.xcconfig:
        * Configurations/CompilerVersion.xcconfig:
        * Configurations/DebugRelease.xcconfig:
        * Configurations/FeatureDefines.xcconfig:
        * Configurations/JSC.xcconfig:
        * Configurations/JavaScriptCore.xcconfig:
        * Configurations/ToolExecutable.xcconfig:

2012-10-25  Filip Pizlo  <fpizlo@apple.com>

        Forward OSR calculation is wrong in the presence of multiple SetLocals, or a mix of SetLocals and Phantoms
        https://bugs.webkit.org/show_bug.cgi?id=100461

        Reviewed by Oliver Hunt and Gavin Barraclough.

        This does a couple of things. First, it removes the part of the change in r131822 that made the forward
        OSR exit calculator capable of handling multiple SetLocals. That change was wrong, because it would
        blindly assume that all SetLocals had the same ValueRecovery, and would ignore the possibility that if
        there is no value recovery then a ForwardCheckStructure on the first SetLocal would not know how to
        recover the state associated with the second SetLocal. Then, it introduces the invariant that any bytecode
        op that decomposes into multiple SetLocals must first emit dead SetLocals as hints and then emit a second
        set of SetLocals to actually do the setting of the locals. This means that if a ForwardCheckStructure (or
        any other hoisted forward speculation) is inserted, it will always be inserted on the second set of
        SetLocals (since hoisting only touches the live ones), at which point OSR will already know about the
        mov hints implied by the first set of (dead) SetLocals. This gives us the behavior we wanted, namely, that
        a ForwardCheckStructure applied to a variant set by a resolve_with_base-like operation can correctly do a
        forward exit while also ensuring that prior to exiting we set the appropriate locals.

        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::parseBlock):
        * dfg/DFGOSRExit.cpp:
        (JSC::DFG::OSRExit::OSRExit):
        * dfg/DFGOSRExit.h:
        (OSRExit):
        * dfg/DFGOSRExitCompiler.cpp:
        * dfg/DFGOSRExitCompiler32_64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::convertLastOSRExitToForward):

2012-10-26  Simon Hausmann  <simon.hausmann@digia.com>

        [Qt] Fix the LLInt build on Windows
        https://bugs.webkit.org/show_bug.cgi?id=97648

        Reviewed by Tor Arne Vestbø.

        The main change for the port on Windows is changing the way offsets are extracted
        and the LLIntAssembly.h is generated to accomodate release and debug configurations.

        Firstly the LLIntOffsetsExtractor binary is now built as-is (no DESTDIR set) and
        placed into debug\LLIntOffsetsExtractor.exe and release\LLIntOffsetsExtractor.exe
        on Windows debug_and_release builds. On other patforms it remainds in the regular
        out directory.

        Secondly the LLIntAssembly.h files must be different for different build types,
        so the LLIntAssembly.h generator in DerivedSources.pri operates no on the extractor
        binary files as input. Using a simple exists() check we verify the presence of either
        a regular, a debug\LLIntOffsetsExtractor and a release\LLIntOffsetsExtractor binary
        and process all of them. The resulting assembly files consequently end up in
        generated\debug\LLIntAssembly.h and generated\release\LLIntAssembly.h.

        In Target.pri we have to also make sure that those directories are in the include
        path according to the release or debug configuration.

        Lastly a small tweak - swapping WTF.pri and JSC.pri inclusions - in the
        LLIntOffsetsExtractor build was needed to make sure that we include
        JavaScriptCore/config.h instead of WTF/config.h, required to fix the
        build issues originally pasted in bug #97648.

        * DerivedSources.pri:
        * JavaScriptCore.pro:
        * LLIntOffsetsExtractor.pro:
        * Target.pri:

2012-10-26  Gabor Ballabas  <gaborb@inf.u-szeged.hu>

        [Qt] Enable JSC's disassembler on x86, x86_64 Linux
        https://bugs.webkit.org/show_bug.cgi?id=100386

        Reviewed by Simon Hausmann.

        It works fine on Linux x86, x86_64 just needs to be enabled in the
        QtWebKit build system.

        * DerivedSources.pri:
        * JavaScriptCore.pri:
        * Target.pri:

2012-10-26  Thiago Marcos P. Santos  <thiago.santos@intel.com>

        Add feature flags for CSS Device Adaptation
        https://bugs.webkit.org/show_bug.cgi?id=95960

        Reviewed by Kenneth Rohde Christiansen.

        * Configurations/FeatureDefines.xcconfig:

2012-10-26  Simon Hausmann  <simon.hausmann@digia.com>

        [WIN] Make LLInt offsets extractor work on Windows
        https://bugs.webkit.org/show_bug.cgi?id=100369

        Reviewed by Kenneth Rohde Christiansen.

        Open the input file explicitly in binary mode to prevent ruby/Windows from thinking that
        it's a text mode file that needs even new line conversions. The binary mode parameter is
        ignored on other platforms.

        * offlineasm/offsets.rb:

2012-10-25  Michael Saboff  <msaboff@apple.com>

        SymbolTableIndexHashTraits::needsDestruction should be set to true
        https://bugs.webkit.org/show_bug.cgi?id=100437

        Reviewed by Mark Hahnenberg.

        For correctness, set SymbolTableIndexHashTraits::needsDestruction to true since SymbolTableEntry's do
        need to have their destructor called due to the possibility of rare data.

        * runtime/SymbolTable.h:
        (SymbolTableIndexHashTraits):

2012-10-25  Filip Pizlo  <fpizlo@apple.com>

        DFG Arrayify elimination should replace it with GetButterfly rather than Phantom
        https://bugs.webkit.org/show_bug.cgi?id=100441

        Reviewed by Oliver Hunt and Gavin Barraclough.

        Made array profiler's to-string helper behave correctly.
        
        Made Arrayify elimination do the right thing (convert to GetButterfly).
        
        Made CFA's interference analysis track clobbered array modes correctly, mostly by
        simplifying the machinery.

        * bytecode/ArrayProfile.cpp:
        (JSC::arrayModesToString):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGAbstractValue.h:
        (JSC::DFG::AbstractValue::clobberArrayModes):
        (AbstractValue):
        * dfg/DFGConstantFoldingPhase.cpp:
        (JSC::DFG::ConstantFoldingPhase::foldConstants):

2012-10-25  Filip Pizlo  <fpizlo@apple.com>

        REGRESSION (r131793-r131826): Crash going to wikifonia.org
        https://bugs.webkit.org/show_bug.cgi?id=100281

        Reviewed by Oliver Hunt.

        Restore something that got lost in the resolve refactoring: the ability to give up on life if
        we see a resolve of 'arguments'.

        * runtime/JSScope.cpp:
        (JSC::JSScope::resolveContainingScopeInternal):

2012-10-25  Dominik Röttsches  <dominik.rottsches@intel.com>

        Conditionalize XHR timeout support
        https://bugs.webkit.org/show_bug.cgi?id=100356

        Reviewed by Adam Barth.

        Adding XHR_TIMEOUT feature to conditionalize this on ports without network backend support.

        * Configurations/FeatureDefines.xcconfig:

2012-10-25  Michael Saboff  <msaboff@apple.com>

        REGRESSION (r131836): failures in list styles tests on EFL, GTK
        https://bugs.webkit.org/show_bug.cgi?id=99824

        Reviewed by Oliver Hunt.

        Saved start of string since it is modified by call convertUTF8ToUTF16().

        * API/JSStringRef.cpp:
        (JSStringCreateWithUTF8CString):

2012-10-24  Filip Pizlo  <fpizlo@apple.com>

        DFG NewArrayBuffer node should keep its data in a structure on the side to free up one of the opInfos
        https://bugs.webkit.org/show_bug.cgi?id=100328

        Reviewed by Oliver Hunt.

        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::parseBlock):
        * dfg/DFGGraph.h:
        (Graph):
        * dfg/DFGNode.h:
        (NewArrayBufferData):
        (DFG):
        (JSC::DFG::Node::newArrayBufferData):
        (Node):
        (JSC::DFG::Node::startConstant):
        (JSC::DFG::Node::numConstants):

2012-10-25  Mark Lam  <mark.lam@apple.com>

        Update the C++ llint to work with the latest op_resolve... changes.
        https://bugs.webkit.org/show_bug.cgi?id=100345.

        Reviewed by Oliver Hunt.

        * llint/LowLevelInterpreter.cpp:
        (JSC::CLoop::execute):
        - emit opcode name as label when not using COMPUTED_GOTOs. The new op_resolve
          opcodes have jumps to these labels.
        - declare all opcode labels as UNUSED_LABEL()s to keep the compiler happy
          for opcodes that are not referenced by anyone.
        * offlineasm/asm.rb:
        - strip llint_ prefix from opcode names used as labels.

2012-10-24  Yuqiang Xian  <yuqiang.xian@intel.com>

        Refactor LLInt64 to distinguish the pointer operations from the 64-bit integer operations
        https://bugs.webkit.org/show_bug.cgi?id=100321

        Reviewed by Filip Pizlo.

        We have refactored the MacroAssembler and JIT compilers to distinguish
        the pointer operations from the 64-bit integer operations (see bug #99154).
        Now we want to do the similar work for LLInt, and the goal is same as
        the one mentioned in 99154.

        This is the first part of the modification: in the offline assembler,
        adding the support of the "<foo>q" instructions which will be used for
        64-bit integer operations.

        * llint/LowLevelInterpreter.cpp:
        (JSC::CLoop::execute):
        * offlineasm/cloop.rb:
        * offlineasm/instructions.rb:
        * offlineasm/x86.rb:

2012-10-24  Filip Pizlo  <fpizlo@apple.com>

        DFG compileBlahBlahByVal methods for Contiguous and ArrayStorage have only one caller and should be removed
        https://bugs.webkit.org/show_bug.cgi?id=100311

        Reviewed by Mark Hahnenberg.

        Just trying to simplify things before I make them more complicated again.

        * dfg/DFGSpeculativeJIT.h:
        (SpeculativeJIT):
        (JSC::DFG::SpeculativeJIT::temporaryRegisterForPutByVal):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (DFG):
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (DFG):
        (JSC::DFG::SpeculativeJIT::compile):

2012-10-23  Andreas Kling  <kling@webkit.org>

        CodeBlock: Give m_putToBaseOperations an inline capacity.
        <http://webkit.org/b/100190>
        <rdar://problem/12562466>

        Reviewed by Oliver Hunt.

        Since the CodeBlock constructor always inserts a single PutToBaseOperation, but there's no
        guarantee that more will follow, give the m_putToBaseOperations vector an inline capacity of 1.
        There are 4009 of these Vectors on Membuster3, and only 126 of them have more than a single entry.

        This change yields a 1.90MB reduction in memory usage.

        * bytecode/CodeBlock.h:
        (CodeBlock):

2012-10-23  Christophe Dumez  <christophe.dumez@intel.com>

        Regression(r132143): Assertion hit in JSC::Interpreter::StackPolicy::StackPolicy(JSC::Interpreter&, const WTF::StackBounds&)
        https://bugs.webkit.org/show_bug.cgi?id=100109

        Reviewed by Oliver Hunt.

        Fix possible integer overflow in StackPolicy constructor by
        using size_t type instead of int for stack sizes. The value
        returned by StackBounds::size() is of type size_t but was
        assigned to an int, which may overflow.

        * interpreter/Interpreter.cpp:
        (JSC):
        (JSC::Interpreter::StackPolicy::StackPolicy):

2012-10-23  Carlos Garcia Campos  <cgarcia@igalia.com>

        Unreviewed. Fix make distcheck.

        * GNUmakefile.list.am: Add missing header file.

2012-10-23  Mark Lam  <mark.lam@apple.com>

        Make topCallFrame reliable.
        https://bugs.webkit.org/show_bug.cgi?id=98928.

        Reviewed by Geoffrey Garen.

        - VM entry points and the GC now uses topCallFrame.
        - The callerFrame value in CallFrames are now always the previous
          frame on the stack, except for the first frame which has a
          callerFrame of 0 (not counting the HostCallFrameFlag).
          Hence, we can now traverse every frame on the stack all the way
          back to the first frame.
        - GlobalExec's will no longer be used as the callerFrame values in
          call frames.
        - Added fences and traps for debugging the JSStack in debug builds.

        * bytecode/SamplingTool.h:
        (SamplingTool):
        (JSC::SamplingTool::CallRecord::CallRecord):
        * dfg/DFGOperations.cpp:
        - Fixed 2 DFG helper functions to flush topCallFrame as expected.
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::prepareForExternalCall):
        * interpreter/CallFrame.h:
        (JSC::ExecState::callerFrameNoFlags):
        (ExecState):
        (JSC::ExecState::argIndexForRegister):
        (JSC::ExecState::getArgumentUnsafe):
        * interpreter/CallFrameClosure.h:
        (CallFrameClosure):
        * interpreter/Interpreter.cpp:
        (JSC):
        (JSC::eval):
        (JSC::Interpreter::Interpreter):
        (JSC::Interpreter::throwException):
        (JSC::Interpreter::execute):
        (JSC::Interpreter::executeCall):
        (JSC::Interpreter::executeConstruct):
        (JSC::Interpreter::prepareForRepeatCall):
        (JSC::Interpreter::endRepeatCall):
        * interpreter/Interpreter.h:
        (JSC):
        (Interpreter):
        * interpreter/JSStack.cpp:
        (JSC::JSStack::JSStack):
        (JSC::JSStack::gatherConservativeRoots):
        (JSC::JSStack::disableErrorStackReserve):
        * interpreter/JSStack.h:
        (JSC):
        (JSStack):
        (JSC::JSStack::installFence):
        (JSC::JSStack::validateFence):
        (JSC::JSStack::installTrapsAfterFrame):
        * interpreter/JSStackInlines.h: Added.
        (JSC):
        (JSC::JSStack::getTopOfFrame):
        (JSC::JSStack::getTopOfStack):
        (JSC::JSStack::getStartOfFrame):
        (JSC::JSStack::pushFrame):
        (JSC::JSStack::popFrame):
        (JSC::JSStack::generateFenceValue):
        (JSC::JSStack::installFence):
        (JSC::JSStack::validateFence):
        (JSC::JSStack::installTrapsAfterFrame):
        * jit/JITStubs.cpp:
        (JSC::jitCompileFor):
        (JSC::lazyLinkFor):
        - Set frame->codeBlock to 0 for both the above because they are called
          with partially intitialized frames (cb uninitialized), but may
          trigger a GC.
        (JSC::DEFINE_STUB_FUNCTION):
        * runtime/JSGlobalData.cpp:
        (JSC::JSGlobalData::JSGlobalData):

2012-10-22  Filip Pizlo  <fpizlo@apple.com>

        DFG::Array::Undecided should be called DFG::Array::SelectUsingPredictions
        https://bugs.webkit.org/show_bug.cgi?id=100052

        Reviewed by Oliver Hunt.

        No functional change, just renaming. It's a clearer name that more accurately
        reflects the meaning, and it eliminates the namespace confusion that will happen
        with the Undecided indexing type in https://bugs.webkit.org/show_bug.cgi?id=98606

        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGArrayMode.cpp:
        (JSC::DFG::fromObserved):
        (JSC::DFG::refineArrayMode):
        (JSC::DFG::modeAlreadyChecked):
        (JSC::DFG::modeToString):
        * dfg/DFGArrayMode.h:
        (JSC::DFG::canCSEStorage):
        (JSC::DFG::modeIsSpecific):
        (JSC::DFG::modeSupportsLength):
        (JSC::DFG::benefitsFromStructureCheck):
        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::fixupNode):
        (JSC::DFG::FixupPhase::blessArrayOperation):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::arrayify):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):

2012-10-22  Mark Lam  <mark.lam@apple.com>

        Change stack recursion checks to be based on stack availability.
        https://bugs.webkit.org/show_bug.cgi?id=99872.

        Reviewed by Filip Pizlo and Geoffrey Garen.

        - Remove m_reentryDepth, ThreadStackType which are now obsolete.
        - Replaced the reentryDepth checks with a StackBounds check.
        - Added the Interpreter::StackPolicy class to compute a reasonable
          stack capacity requirement given the native stack that the
          interpreter is executing on at that time.
        - Reserved an amount of JSStack space for the use of error handling
          and enable its use (using Interpreter::ErrorHandlingMode) when
          we're about to throw or report an exception.
        - Interpreter::StackPolicy also allows more native stack space
          to be used when in ErrorHandlingMode. This is needed in the case
          of native stack overflows.
        - Fixed the parser so that it throws a StackOverflowError instead of
          a SyntaxError when it encounters a stack overflow.

        * API/JSContextRef.cpp:
        (JSContextGroupCreate):
        (JSGlobalContextCreateInGroup):
        * JavaScriptCore.order:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:
        * interpreter/Interpreter.cpp:
        (JSC::Interpreter::ErrorHandlingMode::ErrorHandlingMode):
        (JSC):
        (JSC::Interpreter::ErrorHandlingMode::~ErrorHandlingMode):
        (JSC::Interpreter::StackPolicy::StackPolicy):
        (JSC::Interpreter::Interpreter):
        (JSC::Interpreter::execute):
        (JSC::Interpreter::executeCall):
        (JSC::Interpreter::executeConstruct):
        (JSC::Interpreter::prepareForRepeatCall):
        * interpreter/Interpreter.h:
        (JSC):
        (Interpreter):
        (ErrorHandlingMode):
        (StackPolicy):
        (JSC::Interpreter::StackPolicy::requiredCapacity):
        * interpreter/JSStack.cpp:
        (JSC):
        (JSC::JSStack::JSStack):
        (JSC::JSStack::growSlowCase):
        (JSC::JSStack::enableErrorStackReserve):
        (JSC::JSStack::disableErrorStackReserve):
        * interpreter/JSStack.h:
        (JSStack):
        (JSC::JSStack::reservationEnd):
        (JSC):
        * jsc.cpp:
        (jscmain):
        * parser/Parser.cpp:
        (JSC::::Parser):
        * parser/Parser.h:
        (Parser):
        (JSC::::parse):
        * runtime/ExceptionHelpers.cpp:
        (JSC::throwStackOverflowError):
        * runtime/JSGlobalData.cpp:
        (JSC::JSGlobalData::JSGlobalData):
        (JSC::JSGlobalData::createContextGroup):
        (JSC::JSGlobalData::create):
        (JSC::JSGlobalData::createLeaked):
        (JSC::JSGlobalData::sharedInstance):
        * runtime/JSGlobalData.h:
        (JSC):
        (JSGlobalData):
        * runtime/StringRecursionChecker.h:
        (JSC::StringRecursionChecker::performCheck):
        * testRegExp.cpp:
        (realMain):

2012-10-20  Martin Robinson  <mrobinson@igalia.com>

        Fix 'make dist' for the GTK+ port

        * GNUmakefile.list.am: Add missing files to the source list.

2012-10-21  Raphael Kubo da Costa  <raphael.kubo.da.costa@intel.com>

        [CMake][JSC] Depend on risc.rb to decide when to run the LLInt scripts.
        https://bugs.webkit.org/show_bug.cgi?id=99917

        Reviewed by Geoffrey Garen.

        Depend on the newly-added risc.rb to make sure we always run the
        LLInt scripts when one of them changes.

        * CMakeLists.txt:

2012-10-20  Filip Pizlo  <fpizlo@apple.com>

        LLInt backends of non-ARM RISC platforms should be able to share code with the existing ARMv7 backend
        https://bugs.webkit.org/show_bug.cgi?id=99745

        Reviewed by Geoffrey Garen.

        This moves all of the things in armv7.rb that I thought are generally useful out
        into risc.rb. It also separates some phases (branch ops is separated into one
        phase that does sensible things, and another that does things that are painfully
        ARM-specific), and removes ARM assumptions from others by using a callback to
        drive exactly what lowering must happen. The goal here is to minimize the future
        maintenance burden of LLInt by ensuring that the various platforms share as much
        lowering code as possible.

        * offlineasm/armv7.rb:
        * offlineasm/risc.rb: Added.

2012-10-19  Filip Pizlo  <fpizlo@apple.com>

        DFG should have some facility for recognizing redundant CheckArrays and Arrayifies
        https://bugs.webkit.org/show_bug.cgi?id=99287

        Reviewed by Mark Hahnenberg.

        Adds reasoning about indexing type sets (i.e. ArrayModes) to AbstractValue, which
        then enables us to fold away CheckArray's and Arrayify's that are redundant.

        * bytecode/ArrayProfile.cpp:
        (JSC::arrayModesToString):
        (JSC):
        * bytecode/ArrayProfile.h:
        (JSC):
        (JSC::mergeArrayModes):
        (JSC::arrayModesAlreadyChecked):
        * bytecode/StructureSet.h:
        (JSC::StructureSet::arrayModesFromStructures):
        (StructureSet):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGAbstractValue.h:
        (JSC::DFG::AbstractValue::AbstractValue):
        (JSC::DFG::AbstractValue::clear):
        (JSC::DFG::AbstractValue::isClear):
        (JSC::DFG::AbstractValue::makeTop):
        (JSC::DFG::AbstractValue::clobberStructures):
        (AbstractValue):
        (JSC::DFG::AbstractValue::setMostSpecific):
        (JSC::DFG::AbstractValue::set):
        (JSC::DFG::AbstractValue::operator==):
        (JSC::DFG::AbstractValue::merge):
        (JSC::DFG::AbstractValue::filter):
        (JSC::DFG::AbstractValue::filterArrayModes):
        (JSC::DFG::AbstractValue::validate):
        (JSC::DFG::AbstractValue::checkConsistency):
        (JSC::DFG::AbstractValue::dump):
        (JSC::DFG::AbstractValue::clobberArrayModes):
        (JSC::DFG::AbstractValue::clobberArrayModesSlow):
        (JSC::DFG::AbstractValue::setFuturePossibleStructure):
        (JSC::DFG::AbstractValue::filterFuturePossibleStructure):
        * dfg/DFGArrayMode.cpp:
        (JSC::DFG::modeAlreadyChecked):
        * dfg/DFGArrayMode.h:
        (JSC::DFG::arrayModesFor):
        (DFG):
        * dfg/DFGConstantFoldingPhase.cpp:
        (JSC::DFG::ConstantFoldingPhase::foldConstants):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::arrayify):

2012-10-19  Filip Pizlo  <fpizlo@apple.com>

        Baseline JIT should not inline array allocations, to make them easier to instrument
        https://bugs.webkit.org/show_bug.cgi?id=99905

        Reviewed by Mark Hahnenberg.

        This will make it easier to instrument array allocations for the purposes of profiling.
        It also allows us to kill off a bunch of code. And, this doesn't appear to hurt
        performance at all. That's expected because these days any hot allocation will end up
        in the DFG JIT, which does inline these allocations.

        * jit/JIT.cpp:
        (JSC::JIT::privateCompileSlowCases):
        * jit/JIT.h:
        (JIT):
        * jit/JITInlineMethods.h:
        (JSC):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_op_new_array):

2012-10-19  Oliver Hunt  <oliver@apple.com>

        Fix some of the regression cause by the non-local variable reworking
        https://bugs.webkit.org/show_bug.cgi?id=99896

        Reviewed by Filip Pizlo.

        The non0local variable reworking led to some of the optimisations performed by
        the bytecode generator being dropped.  This in turn put more pressure on the DFG
        optimisations.  This exposed a short coming in our double speculation propogation.
        Now we try to distinguish between places where we should SpecDoubleReal vs generic
        SpecDouble.

        * dfg/DFGPredictionPropagationPhase.cpp:
        (PredictionPropagationPhase):
        (JSC::DFG::PredictionPropagationPhase::speculatedDoubleTypeForPrediction):
        (JSC::DFG::PredictionPropagationPhase::speculatedDoubleTypeForPredictions):
        (JSC::DFG::PredictionPropagationPhase::propagate):

2012-10-19  Michael Saboff  <msaboff@apple.com>

        Lexer should create 8 bit Identifiers for RegularExpressions and ASCII identifiers
        https://bugs.webkit.org/show_bug.cgi?id=99855

        Reviewed by Filip Pizlo.

        Added makeIdentifier helpers that will always make an 8 bit Identifier or make an
        Identifier that is the same size as the template parameter.  Used the first in the fast
        path when looking for a JS identifier and the second when scanning regular expressions.

        * parser/Lexer.cpp:
        (JSC::::scanRegExp):
        * parser/Lexer.h:
        (Lexer):
        (JSC::::makeIdentifierSameType):
        (JSC::::makeLCharIdentifier):
        (JSC::::lexExpectIdentifier):

2012-10-19  Mark Lam  <mark.lam@apple.com>

        Added WTF::StackStats mechanism.
        https://bugs.webkit.org/show_bug.cgi?id=99805.

        Reviewed by Geoffrey Garen.

        Added StackStats checkpoints and probes.

        * bytecompiler/BytecodeGenerator.h:
        (JSC::BytecodeGenerator::emitNode):
        (JSC::BytecodeGenerator::emitNodeInConditionContext):
        * heap/SlotVisitor.cpp:
        (JSC::SlotVisitor::append):
        (JSC::visitChildren):
        (JSC::SlotVisitor::donateKnownParallel):
        (JSC::SlotVisitor::drain):
        (JSC::SlotVisitor::drainFromShared):
        (JSC::SlotVisitor::mergeOpaqueRoots):
        (JSC::SlotVisitor::internalAppend):
        (JSC::SlotVisitor::harvestWeakReferences):
        (JSC::SlotVisitor::finalizeUnconditionalFinalizers):
        * interpreter/Interpreter.cpp:
        (JSC::Interpreter::execute):
        (JSC::Interpreter::executeCall):
        (JSC::Interpreter::executeConstruct):
        (JSC::Interpreter::prepareForRepeatCall):
        * parser/Parser.h:
        (JSC::Parser::canRecurse):
        * runtime/StringRecursionChecker.h:
        (StringRecursionChecker):

2012-10-19  Oliver Hunt  <oliver@apple.com>

        REGRESSION(r131822): It made 500+ tests crash on 32 bit platforms
        https://bugs.webkit.org/show_bug.cgi?id=99814

        Reviewed by Filip Pizlo.

        Call the correct macro in 32bit. 

        * llint/LowLevelInterpreter.asm:

2012-10-19  Dongwoo Joshua Im  <dw.im@samsung.com>

        Rename ENABLE_CSS3_TEXT_DECORATION to ENABLE_CSS3_TEXT
        https://bugs.webkit.org/show_bug.cgi?id=99804

        Reviewed by Julien Chaffraix.

        CSS3 text related properties will be implemented under this flag,
        including text decoration, text-align-last, and text-justify.

        * Configurations/FeatureDefines.xcconfig:

2012-10-18  Anders Carlsson  <andersca@apple.com>

        Clean up RegExpKey
        https://bugs.webkit.org/show_bug.cgi?id=99798

        Reviewed by Darin Adler.

        RegExpHash doesn't need to be a class template specialization when the class template is specialized
        for JSC::RegExpKey only. Make it a nested class of RegExp instead. Also, make operator== a friend function
        so Hash::equal can see it.

        * runtime/RegExpKey.h:
        (JSC::RegExpKey::RegExpKey):
        (JSC::RegExpKey::operator==):
        (RegExpKey):
        (JSC::RegExpKey::Hash::hash):
        (JSC::RegExpKey::Hash::equal):
        (Hash):

2012-10-19  Mark Lam  <mark.lam@apple.com>

        Bot greening: Follow up to r131877 to fix the Windows build.
        https://bugs.webkit.org/show_bug.cgi?id=99739.

        Not reviewed.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:

2012-10-19  Mark Lam  <mark.lam@apple.com>

        Bot greening: Attempt to fix broken Window build after r131836.
        https://bugs.webkit.org/show_bug.cgi?id=99739.

        Not reviewed.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:

2012-10-19  Yuqiang Xian  <yuqiang.xian@intel.com>

        Unreviewed fix after r131868.

        On JSVALUE64 platforms, JSValue constants can be Imm64 instead of ImmPtr for JIT compilers.

        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):

2012-10-18  Filip Pizlo  <fpizlo@apple.com>

        Baseline array profiling should be less accurate, and DFG OSR exit should update array profiles on CheckArray and CheckStructure failure
        https://bugs.webkit.org/show_bug.cgi?id=99261

        Reviewed by Oliver Hunt.

        This makes array profiling stochastic, like value profiling. The point is to avoid
        noticing one-off indexing types that we'll never see again, but instead to:
        
        Notice the big ones: We want the DFG to compile based on the things that happen with
        high probability. So, this change makes array profiling do like value profiling and
        only notice a random subsampling of indexing types that flowed through an array
        access. Prior to this patch array profiles noticed all indexing types and weighted
        them identically.
        
        Bias the recent: Often an array access will see awkward indexing types during the
        first handful of executions because of artifacts of program startup. So, we want to
        bias towards the indexing types that we saw most recently. With this change, array
        profiling does like value profiling and usually tells use a random sampling that
        is biased to what happened recently.
        
        Have a backup plan: The above two things don't work by themselves because our
        randomness is not that random (nor do we care enough to make it more random), and
        because some procedures will have a <1/10 probability event that we must handle
        without bailing because it dominates a hot loop. So, like value profiling, this
        patch makes array profiling use OSR exits to tell us why we are bailing out, so
        that we don't make the same mistake again in the future.
        
        This change also makes the way that the 32-bit OSR exit compiler snatches scratch
        registers more uniform. We don't need a scratch buffer when we can push and pop.

        * bytecode/DFGExitProfile.h:
        * dfg/DFGOSRExitCompiler32_64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::checkArray):
        (JSC::DFG::SpeculativeJIT::arrayify):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * jit/JITInlineMethods.h:
        (JSC::JIT::emitArrayProfilingSite):
        * llint/LowLevelInterpreter.asm:

2012-10-18  Yuqiang Xian  <yuqiang.xian@intel.com>

        [Qt] REGRESSION(r131858): It broke the ARM build
        https://bugs.webkit.org/show_bug.cgi?id=99809

        Reviewed by Csaba Osztrogonác.

        * dfg/DFGCCallHelpers.h:
        (CCallHelpers):
        (JSC::DFG::CCallHelpers::setupArgumentsWithExecState):

2012-10-18  Yuqiang Xian  <yuqiang.xian@intel.com>

        Refactor MacroAssembler interfaces to differentiate the pointer operands from the 64-bit integer operands
        https://bugs.webkit.org/show_bug.cgi?id=99154

        Reviewed by Gavin Barraclough.

        In current JavaScriptCore implementation for JSVALUE64 platform (i.e.,
        the X64 platform), we assume that the JSValue size is same to the
        pointer size, and thus EncodedJSValue is simply type defined as a
        "void*". In the JIT compiler, we also take this assumption and invoke
        the same macro assembler interfaces for both JSValue and pointer
        operands. We need to differentiate the operations on pointers from the
        operations on JSValues, and let them invoking different macro
        assembler interfaces. For example, we now use the interface of
        "loadPtr" to load either a pointer or a JSValue, and we need to switch
        to using "loadPtr" to load a pointer and some new "load64" interface
        to load a JSValue. This would help us supporting other JSVALUE64
        platforms where pointer size is not necessarily 64-bits, for example
        x32 (bug #99153).

        The major modification I made is to introduce the "*64" interfaces in
        the MacroAssembler for those operations on JSValues, keep the "*Ptr"
        interfaces for those operations on real pointers, and go through all
        the JIT compiler code to correct the usage.

        This is the second part of the work, i.e, to correct the usage of the
        new MacroAssembler interfaces in the JIT compilers, which also means
        that now EncodedJSValue is defined as a 64-bit integer, and the "*64"
        interfaces are used for it.

        * assembler/MacroAssembler.h: JSValue immediates should be in Imm64 instead of ImmPtr.
        (MacroAssembler):
        (JSC::MacroAssembler::shouldBlind):
        * dfg/DFGAssemblyHelpers.cpp: Correct the JIT compilers usage of the new interfaces.
        (JSC::DFG::AssemblyHelpers::jitAssertIsInt32):
        (JSC::DFG::AssemblyHelpers::jitAssertIsJSInt32):
        (JSC::DFG::AssemblyHelpers::jitAssertIsJSNumber):
        (JSC::DFG::AssemblyHelpers::jitAssertIsJSDouble):
        (JSC::DFG::AssemblyHelpers::jitAssertIsCell):
        * dfg/DFGAssemblyHelpers.h:
        (JSC::DFG::AssemblyHelpers::emitPutToCallFrameHeader):
        (JSC::DFG::AssemblyHelpers::branchIfNotCell):
        (JSC::DFG::AssemblyHelpers::debugCall):
        (JSC::DFG::AssemblyHelpers::boxDouble):
        (JSC::DFG::AssemblyHelpers::unboxDouble):
        (JSC::DFG::AssemblyHelpers::emitExceptionCheck):
        * dfg/DFGCCallHelpers.h:
        (JSC::DFG::CCallHelpers::setupArgumentsWithExecState):
        (CCallHelpers):
        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::generateProtoChainAccessStub):
        (JSC::DFG::tryCacheGetByID):
        (JSC::DFG::tryBuildGetByIDList):
        (JSC::DFG::emitPutReplaceStub):
        (JSC::DFG::emitPutTransitionStub):
        * dfg/DFGScratchRegisterAllocator.h:
        (JSC::DFG::ScratchRegisterAllocator::preserveUsedRegistersToScratchBuffer):
        (JSC::DFG::ScratchRegisterAllocator::restoreUsedRegistersFromScratchBuffer):
        * dfg/DFGSilentRegisterSavePlan.h:
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::checkArgumentTypes):
        (JSC::DFG::SpeculativeJIT::compileValueToInt32):
        (JSC::DFG::SpeculativeJIT::compileInt32ToDouble):
        (JSC::DFG::SpeculativeJIT::compileInstanceOfForObject):
        (JSC::DFG::SpeculativeJIT::compileInstanceOf):
        (JSC::DFG::SpeculativeJIT::compileStrictEqForConstant):
        (JSC::DFG::SpeculativeJIT::compileGetByValOnArguments):
        * dfg/DFGSpeculativeJIT.h:
        (SpeculativeJIT):
        (JSC::DFG::SpeculativeJIT::silentSavePlanForGPR):
        (JSC::DFG::SpeculativeJIT::silentSpill):
        (JSC::DFG::SpeculativeJIT::silentFill):
        (JSC::DFG::SpeculativeJIT::spill):
        (JSC::DFG::SpeculativeJIT::valueOfJSConstantAsImm64):
        (JSC::DFG::SpeculativeJIT::callOperation):
        (JSC::DFG::SpeculativeJIT::branch64):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::fillInteger):
        (JSC::DFG::SpeculativeJIT::fillDouble):
        (JSC::DFG::SpeculativeJIT::fillJSValue):
        (JSC::DFG::SpeculativeJIT::nonSpeculativeValueToNumber):
        (JSC::DFG::SpeculativeJIT::nonSpeculativeValueToInt32):
        (JSC::DFG::SpeculativeJIT::nonSpeculativeUInt32ToNumber):
        (JSC::DFG::SpeculativeJIT::cachedGetById):
        (JSC::DFG::SpeculativeJIT::cachedPutById):
        (JSC::DFG::SpeculativeJIT::nonSpeculativeNonPeepholeCompareNull):
        (JSC::DFG::SpeculativeJIT::nonSpeculativePeepholeBranchNull):
        (JSC::DFG::SpeculativeJIT::nonSpeculativePeepholeBranch):
        (JSC::DFG::SpeculativeJIT::nonSpeculativeNonPeepholeCompare):
        (JSC::DFG::SpeculativeJIT::nonSpeculativePeepholeStrictEq):
        (JSC::DFG::SpeculativeJIT::nonSpeculativeNonPeepholeStrictEq):
        (JSC::DFG::SpeculativeJIT::emitCall):
        (JSC::DFG::SpeculativeJIT::fillSpeculateIntInternal):
        (JSC::DFG::SpeculativeJIT::fillSpeculateDouble):
        (JSC::DFG::SpeculativeJIT::fillSpeculateCell):
        (JSC::DFG::SpeculativeJIT::fillSpeculateBoolean):
        (JSC::DFG::SpeculativeJIT::convertToDouble):
        (JSC::DFG::SpeculativeJIT::compileObjectEquality):
        (JSC::DFG::SpeculativeJIT::compileObjectToObjectOrOtherEquality):
        (JSC::DFG::SpeculativeJIT::compilePeepHoleObjectToObjectOrOtherEquality):
        (JSC::DFG::SpeculativeJIT::compileDoubleCompare):
        (JSC::DFG::SpeculativeJIT::compileNonStringCellOrOtherLogicalNot):
        (JSC::DFG::SpeculativeJIT::compileLogicalNot):
        (JSC::DFG::SpeculativeJIT::emitNonStringCellOrOtherBranch):
        (JSC::DFG::SpeculativeJIT::emitBranch):
        (JSC::DFG::SpeculativeJIT::compileContiguousGetByVal):
        (JSC::DFG::SpeculativeJIT::compileArrayStorageGetByVal):
        (JSC::DFG::SpeculativeJIT::compileContiguousPutByVal):
        (JSC::DFG::SpeculativeJIT::compileArrayStoragePutByVal):
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGThunks.cpp:
        (JSC::DFG::osrExitGenerationThunkGenerator):
        (JSC::DFG::throwExceptionFromCallSlowPathGenerator):
        (JSC::DFG::slowPathFor):
        (JSC::DFG::virtualForThunkGenerator):
        * interpreter/Interpreter.cpp:
        (JSC::Interpreter::dumpRegisters):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompile):
        * jit/JIT.h:
        (JIT):
        * jit/JITArithmetic.cpp:
        (JSC::JIT::emit_op_negate):
        (JSC::JIT::emitSlow_op_negate):
        (JSC::JIT::emit_op_rshift):
        (JSC::JIT::emitSlow_op_urshift):
        (JSC::JIT::emit_compareAndJumpSlow):
        (JSC::JIT::emit_op_bitand):
        (JSC::JIT::compileBinaryArithOpSlowCase):
        (JSC::JIT::emit_op_div):
        * jit/JITCall.cpp:
        (JSC::JIT::compileLoadVarargs):
        (JSC::JIT::compileCallEval):
        (JSC::JIT::compileCallEvalSlowCase):
        (JSC::JIT::compileOpCall):
        * jit/JITInlineMethods.h: Have some clean-up work as well.
        (JSC):
        (JSC::JIT::emitPutCellToCallFrameHeader):
        (JSC::JIT::emitPutIntToCallFrameHeader):
        (JSC::JIT::emitPutToCallFrameHeader):
        (JSC::JIT::emitGetFromCallFrameHeader32):
        (JSC::JIT::emitGetFromCallFrameHeader64):
        (JSC::JIT::emitAllocateJSArray):
        (JSC::JIT::emitValueProfilingSite):
        (JSC::JIT::emitGetJITStubArg):
        (JSC::JIT::emitGetVirtualRegister):
        (JSC::JIT::emitPutVirtualRegister):
        (JSC::JIT::emitInitRegister):
        (JSC::JIT::emitJumpIfJSCell):
        (JSC::JIT::emitJumpIfBothJSCells):
        (JSC::JIT::emitJumpIfNotJSCell):
        (JSC::JIT::emitLoadInt32ToDouble):
        (JSC::JIT::emitJumpIfImmediateInteger):
        (JSC::JIT::emitJumpIfNotImmediateInteger):
        (JSC::JIT::emitJumpIfNotImmediateIntegers):
        (JSC::JIT::emitFastArithReTagImmediate):
        (JSC::JIT::emitFastArithIntToImmNoCheck):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::privateCompileCTINativeCall):
        (JSC::JIT::emit_op_mov):
        (JSC::JIT::emit_op_instanceof):
        (JSC::JIT::emit_op_is_undefined):
        (JSC::JIT::emit_op_is_boolean):
        (JSC::JIT::emit_op_is_number):
        (JSC::JIT::emit_op_tear_off_activation):
        (JSC::JIT::emit_op_not):
        (JSC::JIT::emit_op_jfalse):
        (JSC::JIT::emit_op_jeq_null):
        (JSC::JIT::emit_op_jneq_null):
        (JSC::JIT::emit_op_jtrue):
        (JSC::JIT::emit_op_bitxor):
        (JSC::JIT::emit_op_bitor):
        (JSC::JIT::emit_op_get_pnames):
        (JSC::JIT::emit_op_next_pname):
        (JSC::JIT::compileOpStrictEq):
        (JSC::JIT::emit_op_catch):
        (JSC::JIT::emit_op_throw_static_error):
        (JSC::JIT::emit_op_eq_null):
        (JSC::JIT::emit_op_neq_null):
        (JSC::JIT::emit_op_create_activation):
        (JSC::JIT::emit_op_create_arguments):
        (JSC::JIT::emit_op_init_lazy_reg):
        (JSC::JIT::emitSlow_op_convert_this):
        (JSC::JIT::emitSlow_op_not):
        (JSC::JIT::emit_op_get_argument_by_val):
        (JSC::JIT::emit_op_put_to_base):
        (JSC::JIT::emit_resolve_operations):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emit_op_get_by_val):
        (JSC::JIT::emitContiguousGetByVal):
        (JSC::JIT::emitArrayStorageGetByVal):
        (JSC::JIT::emitSlow_op_get_by_val):
        (JSC::JIT::compileGetDirectOffset):
        (JSC::JIT::emit_op_get_by_pname):
        (JSC::JIT::emitContiguousPutByVal):
        (JSC::JIT::emitArrayStoragePutByVal):
        (JSC::JIT::compileGetByIdHotPath):
        (JSC::JIT::emit_op_put_by_id):
        (JSC::JIT::compilePutDirectOffset):
        (JSC::JIT::emit_op_init_global_const):
        (JSC::JIT::emit_op_init_global_const_check):
        (JSC::JIT::emitIntTypedArrayGetByVal):
        (JSC::JIT::emitFloatTypedArrayGetByVal):
        (JSC::JIT::emitFloatTypedArrayPutByVal):
        * jit/JITStubCall.h:
        (JITStubCall):
        (JSC::JITStubCall::JITStubCall):
        (JSC::JITStubCall::addArgument):
        (JSC::JITStubCall::call):
        (JSC::JITStubCall::callWithValueProfiling):
        * jit/JSInterfaceJIT.h:
        (JSC::JSInterfaceJIT::emitJumpIfImmediateNumber):
        (JSC::JSInterfaceJIT::emitJumpIfNotImmediateNumber):
        (JSC::JSInterfaceJIT::emitLoadJSCell):
        (JSC::JSInterfaceJIT::emitLoadInt32):
        (JSC::JSInterfaceJIT::emitLoadDouble):
        * jit/SpecializedThunkJIT.h:
        (JSC::SpecializedThunkJIT::returnDouble):
        (JSC::SpecializedThunkJIT::tagReturnAsInt32):
        * runtime/JSValue.cpp:
        (JSC::JSValue::description):
        * runtime/JSValue.h: Define JSVALUE64 EncodedJSValue as int64_t, which is also unified with JSVALUE32_64.
        (JSC):
        * runtime/JSValueInlineMethods.h: New implementation of some JSValue methods to make them more conformant
        with the new rule that "JSValue is a 64-bit integer rather than a pointer" for JSVALUE64 platforms.
        (JSC):
        (JSC::JSValue::JSValue):
        (JSC::JSValue::operator bool):
        (JSC::JSValue::operator==):
        (JSC::JSValue::operator!=):
        (JSC::reinterpretDoubleToInt64):
        (JSC::reinterpretInt64ToDouble):
        (JSC::JSValue::asDouble):

2012-10-18  Michael Saboff  <msaboff@apple.com>

        convertUTF8ToUTF16() Should Check for ASCII Input
        ihttps://bugs.webkit.org/show_bug.cgi?id=99739

        Reviewed by Geoffrey Garen.

        Using the updated convertUTF8ToUTF16() , we can determine if is makes more sense to 
        create a string using the 8 bit source.  Added a new OpaqueJSString::create(LChar*, unsigned).
        Had to add a cast n JSStringCreateWithCFString to differentiate which create() to call.

        * API/JSStringRef.cpp:
        (JSStringCreateWithUTF8CString):
        * API/JSStringRefCF.cpp:
        (JSStringCreateWithCFString):
        * API/OpaqueJSString.h:
        (OpaqueJSString::create):
        (OpaqueJSString):
        (OpaqueJSString::OpaqueJSString):

2012-10-18  Oliver Hunt  <oliver@apple.com>

        Unbreak jsc tests.  Last minute "clever"-ness is clearly just not
        a good plan.

        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::parseBlock):

2012-10-18  Oliver Hunt  <oliver@apple.com>

        Bytecode should not have responsibility for determining how to perform non-local resolves
        https://bugs.webkit.org/show_bug.cgi?id=99349

        Reviewed by Gavin Barraclough.

        This patch removes lexical analysis from the bytecode generation.  This allows
        us to delay lookup of a non-local variables until the lookup is actually necessary,
        and simplifies a lot of the resolve logic in BytecodeGenerator.

        Once a lookup is performed we cache the lookup information in a set of out-of-line
        buffers in CodeBlock.  This allows subsequent lookups to avoid unnecessary hashing,
        etc, and allows the respective JITs to recreated optimal lookup code.

        This is currently still a performance regression in LLInt, but most of the remaining
        regression is caused by a lot of indirection that I'll remove in future work, as well
        as some work necessary to allow LLInt to perform in line instruction repatching.
        We will also want to improve the behaviour of the baseline JIT for some of the lookup
        operations, however this patch was getting quite large already so I'm landing it now
        that we've reached the bar of "performance-neutral".

        Basic browsing seems to work.

        * GNUmakefile.list.am:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::printStructures):
        (JSC::CodeBlock::dump):
        (JSC::CodeBlock::CodeBlock):
        (JSC::CodeBlock::visitStructures):
        (JSC):
        (JSC::CodeBlock::finalizeUnconditionally):
        (JSC::CodeBlock::shrinkToFit):
        * bytecode/CodeBlock.h:
        (JSC::CodeBlock::addResolve):
        (JSC::CodeBlock::addPutToBase):
        (CodeBlock):
        (JSC::CodeBlock::resolveOperations):
        (JSC::CodeBlock::putToBaseOperation):
        (JSC::CodeBlock::numberOfResolveOperations):
        (JSC::CodeBlock::numberOfPutToBaseOperations):
        (JSC::CodeBlock::addPropertyAccessInstruction):
        (JSC::CodeBlock::globalObjectConstant):
        (JSC::CodeBlock::setGlobalObjectConstant):
        * bytecode/Opcode.h:
        (JSC):
        (JSC::padOpcodeName):
        * bytecode/ResolveGlobalStatus.cpp:
        (JSC::computeForStructure):
        (JSC::ResolveGlobalStatus::computeFor):
        * bytecode/ResolveGlobalStatus.h:
        (JSC):
        (ResolveGlobalStatus):
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::ResolveResult::checkValidity):
        (JSC):
        (JSC::BytecodeGenerator::BytecodeGenerator):
        (JSC::BytecodeGenerator::resolve):
        (JSC::BytecodeGenerator::resolveConstDecl):
        (JSC::BytecodeGenerator::shouldAvoidResolveGlobal):
        (JSC::BytecodeGenerator::emitResolve):
        (JSC::BytecodeGenerator::emitResolveBase):
        (JSC::BytecodeGenerator::emitResolveBaseForPut):
        (JSC::BytecodeGenerator::emitResolveWithBaseForPut):
        (JSC::BytecodeGenerator::emitResolveWithThis):
        (JSC::BytecodeGenerator::emitGetLocalVar):
        (JSC::BytecodeGenerator::emitInitGlobalConst):
        (JSC::BytecodeGenerator::emitPutToBase):
        * bytecompiler/BytecodeGenerator.h:
        (JSC::ResolveResult::registerResolve):
        (JSC::ResolveResult::dynamicResolve):
        (ResolveResult):
        (JSC::ResolveResult::ResolveResult):
        (JSC):
        (NonlocalResolveInfo):
        (JSC::NonlocalResolveInfo::NonlocalResolveInfo):
        (JSC::NonlocalResolveInfo::~NonlocalResolveInfo):
        (JSC::NonlocalResolveInfo::resolved):
        (JSC::NonlocalResolveInfo::put):
        (BytecodeGenerator):
        (JSC::BytecodeGenerator::getResolveOperations):
        (JSC::BytecodeGenerator::getResolveWithThisOperations):
        (JSC::BytecodeGenerator::getResolveBaseOperations):
        (JSC::BytecodeGenerator::getResolveBaseForPutOperations):
        (JSC::BytecodeGenerator::getResolveWithBaseForPutOperations):
        (JSC::BytecodeGenerator::getPutToBaseOperation):
        * bytecompiler/NodesCodegen.cpp:
        (JSC::ResolveNode::isPure):
        (JSC::FunctionCallResolveNode::emitBytecode):
        (JSC::PostfixNode::emitResolve):
        (JSC::PrefixNode::emitResolve):
        (JSC::ReadModifyResolveNode::emitBytecode):
        (JSC::AssignResolveNode::emitBytecode):
        (JSC::ConstDeclNode::emitCodeSingle):
        (JSC::ForInNode::emitBytecode):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGByteCodeParser.cpp:
        (ByteCodeParser):
        (InlineStackEntry):
        (JSC::DFG::ByteCodeParser::handleGetByOffset):
        (DFG):
        (JSC::DFG::ByteCodeParser::parseResolveOperations):
        (JSC::DFG::ByteCodeParser::parseBlock):
        (JSC::DFG::ByteCodeParser::InlineStackEntry::InlineStackEntry):
        * dfg/DFGCapabilities.h:
        (JSC::DFG::canInlineResolveOperations):
        (DFG):
        (JSC::DFG::canCompileOpcode):
        (JSC::DFG::canInlineOpcode):
        * dfg/DFGGraph.h:
        (ResolveGlobalData):
        (ResolveOperationData):
        (DFG):
        (PutToBaseOperationData):
        (Graph):
        * dfg/DFGNode.h:
        (JSC::DFG::Node::hasIdentifier):
        (JSC::DFG::Node::resolveOperationsDataIndex):
        (Node):
        * dfg/DFGNodeType.h:
        (DFG):
        * dfg/DFGOSRExit.cpp:
        (JSC::DFG::OSRExit::OSRExit):
        * dfg/DFGOSRExit.h:
        (OSRExit):
        * dfg/DFGOSRExitCompiler.cpp:
        * dfg/DFGOSRExitCompiler32_64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOperations.cpp:
        * dfg/DFGOperations.h:
        * dfg/DFGPredictionPropagationPhase.cpp:
        (JSC::DFG::PredictionPropagationPhase::propagate):
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::tryCacheGetByID):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::convertLastOSRExitToForward):
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::resolveOperations):
        (SpeculativeJIT):
        (JSC::DFG::SpeculativeJIT::putToBaseOperation):
        (JSC::DFG::SpeculativeJIT::callOperation):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGStructureCheckHoistingPhase.cpp:
        (JSC::DFG::StructureCheckHoistingPhase::run):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompileMainPass):
        (JSC::JIT::privateCompileSlowCases):
        * jit/JIT.h:
        (JIT):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_op_put_to_base):
        (JSC):
        (JSC::JIT::emit_resolve_operations):
        (JSC::JIT::emitSlow_link_resolve_operations):
        (JSC::JIT::emit_op_resolve):
        (JSC::JIT::emitSlow_op_resolve):
        (JSC::JIT::emit_op_resolve_base):
        (JSC::JIT::emitSlow_op_resolve_base):
        (JSC::JIT::emit_op_resolve_with_base):
        (JSC::JIT::emitSlow_op_resolve_with_base):
        (JSC::JIT::emit_op_resolve_with_this):
        (JSC::JIT::emitSlow_op_resolve_with_this):
        (JSC::JIT::emitSlow_op_put_to_base):
        * jit/JITOpcodes32_64.cpp:
        (JSC::JIT::emit_op_put_to_base):
        (JSC):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emit_op_init_global_const):
        (JSC::JIT::emit_op_init_global_const_check):
        (JSC::JIT::emitSlow_op_init_global_const_check):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::emit_op_init_global_const):
        (JSC::JIT::emit_op_init_global_const_check):
        (JSC::JIT::emitSlow_op_init_global_const_check):
        * jit/JITStubs.cpp:
        (JSC::DEFINE_STUB_FUNCTION):
        (JSC):
        * jit/JITStubs.h:
        * llint/LLIntSlowPaths.cpp:
        (LLInt):
        (JSC::LLInt::LLINT_SLOW_PATH_DECL):
        * llint/LLIntSlowPaths.h:
        (LLInt):
        * llint/LowLevelInterpreter.asm:
        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm:
        * runtime/JSScope.cpp:
        (JSC::LookupResult::base):
        (JSC::LookupResult::value):
        (JSC::LookupResult::setBase):
        (JSC::LookupResult::setValue):
        (LookupResult):
        (JSC):
        (JSC::setPutPropertyAccessOffset):
        (JSC::executeResolveOperations):
        (JSC::JSScope::resolveContainingScopeInternal):
        (JSC::JSScope::resolveContainingScope):
        (JSC::JSScope::resolve):
        (JSC::JSScope::resolveBase):
        (JSC::JSScope::resolveWithBase):
        (JSC::JSScope::resolveWithThis):
        (JSC::JSScope::resolvePut):
        (JSC::JSScope::resolveGlobal):
        * runtime/JSScope.h:
        (JSScope):
        * runtime/JSVariableObject.cpp:
        (JSC):
        * runtime/JSVariableObject.h:
        (JSVariableObject):
        * runtime/Structure.h:
        (JSC::Structure::propertyAccessesAreCacheable):
        (Structure):

2012-10-18  Mark Hahnenberg  <mhahnenberg@apple.com>

        Live oversize copied blocks should count toward overall heap fragmentation
        https://bugs.webkit.org/show_bug.cgi?id=99548

        Reviewed by Filip Pizlo.

        The CopiedSpace uses overall heap fragmentation to determine whether or not it should do any copying. 
        Currently it doesn't include live oversize CopiedBlocks in the calculation, but it should. We should 
        treat them as 100% utilized, since running a copying phase won't be able to free/compact any of their 
        memory. We can also free any dead oversize CopiedBlocks while we're iterating over them, rather than 
        iterating over them again at the end of the copying phase.

        * heap/CopiedSpace.cpp:
        (JSC::CopiedSpace::doneFillingBlock):
        (JSC::CopiedSpace::startedCopying):
        (JSC::CopiedSpace::doneCopying): Also removed a branch when iterating over from-space at the end of 
        copying. Since we eagerly recycle blocks as soon as they're fully evacuated, we should see no
        unpinned blocks in from-space at the end of copying.
        * heap/CopiedSpaceInlineMethods.h:
        (JSC::CopiedSpace::recycleBorrowedBlock):
        * heap/CopyVisitorInlineMethods.h:
        (JSC::CopyVisitor::checkIfShouldCopy):

2012-10-18  Roger Fong  <roger_fong@apple.com>

        Unreviewed. Build fix after r131701 and r131777.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:

2012-10-18  Mark Hahnenberg  <mhahnenberg@apple.com>

        Race condition between GCThread and main thread during copying phase
        https://bugs.webkit.org/show_bug.cgi?id=99641

        Reviewed by Filip Pizlo.

        When a GCThread returns from copyFromShared(), it then calls doneCopying(), which returns 
        its borrowed CopiedBlock to the CopiedSpace. This final block allows the CopiedSpace to 
        continue and finish the cleanup of the copying phase. However, the GCThread can loop back 
        around, see that m_currentPhase is still "Copy", and try to go through the copying phase again. 
        This can cause all sorts of issues. To fix this, we should add a cyclic barrier to GCThread::waitForNextPhase().

        * heap/GCThread.cpp:
        (JSC::GCThread::waitForNextPhase): All GCThreads will wait when they finish one iteration until the main thread 
        notifies them to move down to the second while loop, where they wait for the next GCPhase to start. They also 
        decrement the m_numberOfActiveGCThreads counter as they begin to wait for the next phase and increment it as 
        they enter the next phase. This allows the main thread to wait in endCurrentPhase() until all the threads have 
        finished the current phase and are waiting on the next phase to begin. Without the counter, there would be 
        no way to ensure that every thread was available for each GCPhase.
        (JSC::GCThread::gcThreadMain): We now use the m_phaseLock to synchronize with the main thread when we're being created.
        * heap/GCThreadSharedData.cpp:
        (JSC::GCThreadSharedData::GCThreadSharedData): As we create each GCThread, we increment the m_numberOfActiveGCThreads
        counter. When we are done creating the threads, we wait until they're all waiting for the next GCPhase. This prevents 
        us from leaving some GCThreads behind during the first GCPhase, which could hurt us on our very short-running 
        benchmarks (e.g. SunSpider).
        (JSC::GCThreadSharedData::~GCThreadSharedData):
        (JSC::GCThreadSharedData::startNextPhase): We atomically swap the two flags, m_gcThreadsShouldWait and m_currentPhase, 
        so that if the threads finish very quickly, they will wait until the main thread is ready to end the current phase.
        (JSC::GCThreadSharedData::endCurrentPhase): Here atomically we swap the two flags again to allow the threads to 
        advance to waiting on the next GCPhase. We wait until all of the GCThreads have settled into the second wait loop
        before allowing the main thread to continue. This prevents us from leaving one of the GCThreads stuck in the first 
        wait loop if we were to call startNextPhase() before it had time to wake up and move on to the second wait loop.
        (JSC):
        (JSC::GCThreadSharedData::didStartMarking): We now use startNextPhase() to properly swap the flags.
        (JSC::GCThreadSharedData::didFinishMarking): Ditto for endCurrentPhase().
        (JSC::GCThreadSharedData::didStartCopying): Ditto.
        (JSC::GCThreadSharedData::didFinishCopying): Ditto.
        * heap/GCThreadSharedData.h:
        (GCThreadSharedData):
        * heap/Heap.cpp: 
        (JSC::Heap::copyBackingStores): No reason to use the extra reference.

2012-10-18  Pablo Flouret  <pablof@motorola.com>

        Implement css3-conditional's @supports rule
        https://bugs.webkit.org/show_bug.cgi?id=86146

        Reviewed by Antti Koivisto.

        * Configurations/FeatureDefines.xcconfig:
            Add an ENABLE_CSS3_CONDITIONAL_RULES flag.

2012-10-18  Michael Saboff  <msaboff@apple.com>

        Make conversion between JSStringRef and WKStringRef work without character size conversions
        https://bugs.webkit.org/show_bug.cgi?id=99727

        Reviewed by Anders Carlsson.

        Export the string() method for use in WebKit.

        * API/OpaqueJSString.h:
        (OpaqueJSString::string):

2012-10-18  Raphael Kubo da Costa  <raphael.kubo.da.costa@intel.com>

        [CMake] Avoid unnecessarily running the LLInt generation commands.
        https://bugs.webkit.org/show_bug.cgi?id=99708

        Reviewed by Rob Buis.

        As described in the comments in the change itself, in some cases
        the Ruby generation scripts used when LLInt is on would each be
        run twice in every build even if nothing had changed.

        Fix that by not setting the OBJECT_DEPENDS property of some source
        files to depend on the generated headers; instead, they are now
        just part of the final binaries/libraries which use them.

        * CMakeLists.txt:

2012-10-17  Zoltan Horvath  <zoltan@webkit.org>

        Remove the JSHeap memory measurement of the PageLoad performacetests since it creates bogus JSGlobalDatas
        https://bugs.webkit.org/show_bug.cgi?id=99609 

        Reviewed by Ryosuke Niwa.

        Remove the implementation since it creates bogus JSGlobalDatas in the layout tests.

        * heap/HeapStatistics.cpp:
        (JSC):
        * heap/HeapStatistics.h:
        (HeapStatistics):

2012-10-17  Sam Weinig  <sam@webkit.org>

        Attempt to fix the build.

        * bytecode/GlobalResolveInfo.h: Copied from bytecode/GlobalResolveInfo.h.

2012-10-17  Filip Pizlo  <fpizlo@apple.com>

        REGRESSION (r130826 or r130828): Twitter top bar is dysfunctional
        https://bugs.webkit.org/show_bug.cgi?id=99577
        <rdar://problem/12518883>

        Reviewed by Mark Hahnenberg.

        It turns out that it's a good idea to maintain the invariants of your object model, such as that
        elements past publicLength should have the hole value.

        * dfg/DFGGraph.cpp:
        (JSC::DFG::Graph::dump):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):

2012-10-17  Anders Carlsson  <andersca@apple.com>

        Clean up Vector.h
        https://bugs.webkit.org/show_bug.cgi?id=99622

        Reviewed by Benjamin Poulain.

        Fix fallout from removing std::max and std::min using declarations.

        * runtime/StringPrototype.cpp:
        (JSC::jsSpliceSubstrings):
        (JSC::jsSpliceSubstringsWithSeparators):
        (JSC::stringProtoFuncIndexOf):
        * yarr/YarrPattern.cpp:
        (JSC::Yarr::YarrPatternConstructor::setupDisjunctionOffsets):

2012-10-17  Oliver Hunt  <oliver@apple.com>

        Committing new files is so overrated.

        * bytecode/ResolveOperation.h: Added.
        (JSC):
        (JSC::ResolveOperation::getAndReturnScopedVar):
        (JSC::ResolveOperation::checkForDynamicEntriesBeforeGlobalScope):
        (ResolveOperation):
        (JSC::ResolveOperation::getAndReturnGlobalVar):
        (JSC::ResolveOperation::getAndReturnGlobalProperty):
        (JSC::ResolveOperation::resolveFail):
        (JSC::ResolveOperation::skipTopScopeNode):
        (JSC::ResolveOperation::skipScopes):
        (JSC::ResolveOperation::returnGlobalObjectAsBase):
        (JSC::ResolveOperation::setBaseToGlobal):
        (JSC::ResolveOperation::setBaseToUndefined):
        (JSC::ResolveOperation::setBaseToScope):
        (JSC::ResolveOperation::returnScopeAsBase):
        (JSC::PutToBaseOperation::PutToBaseOperation):

2012-10-17  Michael Saboff  <msaboff@apple.com>

        StringPrototype::jsSpliceSubstringsWithSeparators() doesn't optimally handle 8 bit strings
        https://bugs.webkit.org/show_bug.cgi?id=99230

        Reviewed by Geoffrey Garen.

        Added code to select characters8() or characters16() on the not all 8 bit path for both the 
        processing of the source and the separators.

        * runtime/StringPrototype.cpp:
        (JSC::jsSpliceSubstringsWithSeparators):

2012-10-17  Filip Pizlo  <fpizlo@apple.com>

        Array and object allocations via 'new Object' or 'new Array' should be inlined in bytecode to allow allocation site profiling
        https://bugs.webkit.org/show_bug.cgi?id=99557

        Reviewed by Geoffrey Garen.

        Removed an inaccurate and misleading comment as per Geoff's review. (I forgot
        to make this change as part of http://trac.webkit.org/changeset/131644).

        * bytecompiler/NodesCodegen.cpp:
        (JSC::FunctionCallResolveNode::emitBytecode):

2012-10-17  Oliver Hunt  <oliver@apple.com>

        Bytecode should not have responsibility for determining how to perform non-local resolves
        https://bugs.webkit.org/show_bug.cgi?id=99349

        Reviewed by Gavin Barraclough.

        This patch removes lexical analysis from the bytecode generation.  This allows
        us to delay lookup of a non-local variables until the lookup is actually necessary,
        and simplifies a lot of the resolve logic in BytecodeGenerator.

        Once a lookup is performed we cache the lookup information in a set of out-of-line
        buffers in CodeBlock.  This allows subsequent lookups to avoid unnecessary hashing,
        etc, and allows the respective JITs to recreated optimal lookup code.

        This is currently still a performance regression in LLInt, but most of the remaining
        regression is caused by a lot of indirection that I'll remove in future work, as well
        as some work necessary to allow LLInt to perform in line instruction repatching.
        We will also want to improve the behaviour of the baseline JIT for some of the lookup
        operations, however this patch was getting quite large already so I'm landing it now
        that we've reached the bar of "performance-neutral".

        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::printStructures):
        (JSC::CodeBlock::dump):
        (JSC::CodeBlock::CodeBlock):
        (JSC::CodeBlock::visitStructures):
        (JSC):
        (JSC::CodeBlock::finalizeUnconditionally):
        (JSC::CodeBlock::shrinkToFit):
        * bytecode/CodeBlock.h:
        (JSC::CodeBlock::addResolve):
        (JSC::CodeBlock::addPutToBase):
        (CodeBlock):
        (JSC::CodeBlock::resolveOperations):
        (JSC::CodeBlock::putToBaseOperation):
        (JSC::CodeBlock::numberOfResolveOperations):
        (JSC::CodeBlock::numberOfPutToBaseOperations):
        (JSC::CodeBlock::addPropertyAccessInstruction):
        (JSC::CodeBlock::globalObjectConstant):
        (JSC::CodeBlock::setGlobalObjectConstant):
        * bytecode/GlobalResolveInfo.h: Removed.
        * bytecode/Opcode.h:
        (JSC):
        (JSC::padOpcodeName):
        * bytecode/ResolveGlobalStatus.cpp:
        (JSC::computeForStructure):
        (JSC::ResolveGlobalStatus::computeFor):
        * bytecode/ResolveGlobalStatus.h:
        (JSC):
        (ResolveGlobalStatus):
        * bytecode/ResolveOperation.h: Added.
          The new types and logic we use to perform the cached lookups.
        (JSC):
        (ResolveOperation):
        (JSC::ResolveOperation::getAndReturnScopedVar):
        (JSC::ResolveOperation::checkForDynamicEntriesBeforeGlobalScope):
        (JSC::ResolveOperation::getAndReturnGlobalVar):
        (JSC::ResolveOperation::getAndReturnGlobalProperty):
        (JSC::ResolveOperation::resolveFail):
        (JSC::ResolveOperation::skipTopScopeNode):
        (JSC::ResolveOperation::skipScopes):
        (JSC::ResolveOperation::returnGlobalObjectAsBase):
        (JSC::ResolveOperation::setBaseToGlobal):
        (JSC::ResolveOperation::setBaseToUndefined):
        (JSC::ResolveOperation::setBaseToScope):
        (JSC::ResolveOperation::returnScopeAsBase):
        (JSC::PutToBaseOperation::PutToBaseOperation):
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::ResolveResult::checkValidity):
        (JSC):
        (JSC::BytecodeGenerator::BytecodeGenerator):
        (JSC::BytecodeGenerator::resolve):
        (JSC::BytecodeGenerator::resolveConstDecl):
        (JSC::BytecodeGenerator::shouldAvoidResolveGlobal):
        (JSC::BytecodeGenerator::emitResolve):
        (JSC::BytecodeGenerator::emitResolveBase):
        (JSC::BytecodeGenerator::emitResolveBaseForPut):
        (JSC::BytecodeGenerator::emitResolveWithBaseForPut):
        (JSC::BytecodeGenerator::emitResolveWithThis):
        (JSC::BytecodeGenerator::emitGetLocalVar):
        (JSC::BytecodeGenerator::emitInitGlobalConst):
        (JSC::BytecodeGenerator::emitPutToBase):
        * bytecompiler/BytecodeGenerator.h:
        (JSC::ResolveResult::registerResolve):
        (JSC::ResolveResult::dynamicResolve):
        (ResolveResult):
        (JSC::ResolveResult::ResolveResult):
        (JSC):
        (NonlocalResolveInfo):
        (JSC::NonlocalResolveInfo::NonlocalResolveInfo):
        (JSC::NonlocalResolveInfo::~NonlocalResolveInfo):
        (JSC::NonlocalResolveInfo::resolved):
        (JSC::NonlocalResolveInfo::put):
        (BytecodeGenerator):
        (JSC::BytecodeGenerator::getResolveOperations):
        (JSC::BytecodeGenerator::getResolveWithThisOperations):
        (JSC::BytecodeGenerator::getResolveBaseOperations):
        (JSC::BytecodeGenerator::getResolveBaseForPutOperations):
        (JSC::BytecodeGenerator::getResolveWithBaseForPutOperations):
        (JSC::BytecodeGenerator::getPutToBaseOperation):
        * bytecompiler/NodesCodegen.cpp:
        (JSC::ResolveNode::isPure):
        (JSC::FunctionCallResolveNode::emitBytecode):
        (JSC::PostfixNode::emitResolve):
        (JSC::PrefixNode::emitResolve):
        (JSC::ReadModifyResolveNode::emitBytecode):
        (JSC::AssignResolveNode::emitBytecode):
        (JSC::ConstDeclNode::emitCodeSingle):
        (JSC::ForInNode::emitBytecode):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGByteCodeParser.cpp:
        (ByteCodeParser):
        (InlineStackEntry):
        (JSC::DFG::ByteCodeParser::handleGetByOffset):
        (DFG):
        (JSC::DFG::ByteCodeParser::parseResolveOperations):
        (JSC::DFG::ByteCodeParser::parseBlock):
        (JSC::DFG::ByteCodeParser::InlineStackEntry::InlineStackEntry):
        * dfg/DFGCapabilities.h:
        (JSC::DFG::canCompileResolveOperations):
        (DFG):
        (JSC::DFG::canCompilePutToBaseOperation):
        (JSC::DFG::canCompileOpcode):
        (JSC::DFG::canInlineOpcode):
        * dfg/DFGGraph.h:
        (ResolveGlobalData):
        (ResolveOperationData):
        (DFG):
        (PutToBaseOperationData):
        (Graph):
        * dfg/DFGNode.h:
        (JSC::DFG::Node::hasIdentifier):
        (JSC::DFG::Node::resolveOperationsDataIndex):
        (Node):
        * dfg/DFGNodeType.h:
        (DFG):
        * dfg/DFGOSRExit.cpp:
        (JSC::DFG::OSRExit::OSRExit):
        * dfg/DFGOSRExit.h:
        (OSRExit):
        * dfg/DFGOSRExitCompiler.cpp:
        * dfg/DFGOSRExitCompiler32_64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOperations.cpp:
        * dfg/DFGOperations.h:
        * dfg/DFGPredictionPropagationPhase.cpp:
        (JSC::DFG::PredictionPropagationPhase::propagate):
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::tryCacheGetByID):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::convertLastOSRExitToForward):
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::resolveOperations):
        (SpeculativeJIT):
        (JSC::DFG::SpeculativeJIT::putToBaseOperation):
        (JSC::DFG::SpeculativeJIT::callOperation):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGStructureCheckHoistingPhase.cpp:
        (JSC::DFG::StructureCheckHoistingPhase::run):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompileMainPass):
        (JSC::JIT::privateCompileSlowCases):
        * jit/JIT.h:
        (JIT):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_op_put_to_base):
        (JSC):
        (JSC::JIT::emit_resolve_operations):
        (JSC::JIT::emitSlow_link_resolve_operations):
        (JSC::JIT::emit_op_resolve):
        (JSC::JIT::emitSlow_op_resolve):
        (JSC::JIT::emit_op_resolve_base):
        (JSC::JIT::emitSlow_op_resolve_base):
        (JSC::JIT::emit_op_resolve_with_base):
        (JSC::JIT::emitSlow_op_resolve_with_base):
        (JSC::JIT::emit_op_resolve_with_this):
        (JSC::JIT::emitSlow_op_resolve_with_this):
        (JSC::JIT::emitSlow_op_put_to_base):
        * jit/JITOpcodes32_64.cpp:
        (JSC::JIT::emit_op_put_to_base):
        (JSC):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emit_op_init_global_const):
        (JSC::JIT::emit_op_init_global_const_check):
        (JSC::JIT::emitSlow_op_init_global_const_check):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::emit_op_init_global_const):
        (JSC::JIT::emit_op_init_global_const_check):
        (JSC::JIT::emitSlow_op_init_global_const_check):
        * jit/JITStubs.cpp:
        (JSC::DEFINE_STUB_FUNCTION):
        (JSC):
        * jit/JITStubs.h:
        * llint/LLIntSlowPaths.cpp:
        (LLInt):
        (JSC::LLInt::LLINT_SLOW_PATH_DECL):
        * llint/LLIntSlowPaths.h:
        (LLInt):
        * llint/LowLevelInterpreter.asm:
        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm:
        * runtime/JSScope.cpp:
        (JSC::LookupResult::base):
        (JSC::LookupResult::value):
        (JSC::LookupResult::setBase):
        (JSC::LookupResult::setValue):
        (LookupResult):
        (JSC):
        (JSC::setPutPropertyAccessOffset):
        (JSC::executeResolveOperations):
        (JSC::JSScope::resolveContainingScopeInternal):
        (JSC::JSScope::resolveContainingScope):
        (JSC::JSScope::resolve):
        (JSC::JSScope::resolveBase):
        (JSC::JSScope::resolveWithBase):
        (JSC::JSScope::resolveWithThis):
        (JSC::JSScope::resolvePut):
        (JSC::JSScope::resolveGlobal):
        * runtime/JSScope.h:
        (JSScope):
        * runtime/JSVariableObject.cpp:
        (JSC):
        * runtime/JSVariableObject.h:
        (JSVariableObject):
        * runtime/Structure.h:
        (JSC::Structure::propertyAccessesAreCacheable):
        (Structure):

2012-10-17  Filip Pizlo  <fpizlo@apple.com>

        Array and object allocations via 'new Object' or 'new Array' should be inlined in bytecode to allow allocation site profiling
        https://bugs.webkit.org/show_bug.cgi?id=99557

        Reviewed by Geoffrey Garen.

        This uses the old jneq_ptr trick to allow for the bytecode to "see" that the
        operation in question is what we almost certainly know it to be.

        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::dump):
        * bytecode/Opcode.h:
        (JSC):
        (JSC::padOpcodeName):
        * bytecode/SpecialPointer.h:
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::BytecodeGenerator::emitCall):
        (JSC::BytecodeGenerator::emitCallEval):
        (JSC::BytecodeGenerator::expectedFunctionForIdentifier):
        (JSC):
        (JSC::BytecodeGenerator::emitExpectedFunctionSnippet):
        (JSC::BytecodeGenerator::emitConstruct):
        * bytecompiler/BytecodeGenerator.h:
        (BytecodeGenerator):
        * bytecompiler/NodesCodegen.cpp:
        (JSC::NewExprNode::emitBytecode):
        (JSC::FunctionCallValueNode::emitBytecode):
        (JSC::FunctionCallResolveNode::emitBytecode):
        (JSC::FunctionCallBracketNode::emitBytecode):
        (JSC::FunctionCallDotNode::emitBytecode):
        (JSC::CallFunctionCallDotNode::emitBytecode):
        (JSC::ApplyFunctionCallDotNode::emitBytecode):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::parseBlock):
        * dfg/DFGCapabilities.h:
        (JSC::DFG::canCompileOpcode):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompileMainPass):
        * jit/JIT.h:
        (JIT):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_op_new_array_with_size):
        (JSC):
        * jit/JITStubs.cpp:
        (JSC::DEFINE_STUB_FUNCTION):
        (JSC):
        * jit/JITStubs.h:
        * llint/LLIntSlowPaths.cpp:
        (JSC::LLInt::LLINT_SLOW_PATH_DECL):
        (LLInt):
        * llint/LLIntSlowPaths.h:
        (LLInt):
        * llint/LowLevelInterpreter.asm:
        * runtime/ArrayConstructor.cpp:
        (JSC::constructArrayWithSizeQuirk):
        (JSC):
        * runtime/ArrayConstructor.h:
        (JSC):
        * runtime/CommonIdentifiers.h:
        * runtime/JSGlobalObject.cpp:
        (JSC::JSGlobalObject::reset):
        (JSC):

2012-10-17  Filip Pizlo  <fpizlo@apple.com>

        JIT op_get_by_pname should call cti_get_by_val_generic and not cti_get_by_val
        https://bugs.webkit.org/show_bug.cgi?id=99631
        <rdar://problem/12483221>

        Reviewed by Mark Hahnenberg.

        cti_get_by_val assumes that the return address has patching metadata associated with it, which won't
        be true for op_get_by_pname. cti_get_by_val_generic makes no such assumptions.

        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emitSlow_op_get_by_pname):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::emitSlow_op_get_by_pname):

2012-10-17  Mark Hahnenberg  <mhahnenberg@apple.com>

        Block freeing thread should sleep indefinitely when there's no work to do
        https://bugs.webkit.org/show_bug.cgi?id=98084

        Reviewed by Geoffrey Garen.

        r130212 didn't fully fix the problem.

        * heap/BlockAllocator.cpp:
        (JSC::BlockAllocator::blockFreeingThreadMain): We would just continue to the next iteration if 
        we found that we had zero blocks to copy. We should move the indefinite wait up to where that 
        check is done so that we properly detect the "no more blocks to copy, wait for more" condition.

2012-10-16  Csaba Osztrogonác  <ossy@webkit.org>

        Unreviewed, rolling out r131516 and r131550.
        http://trac.webkit.org/changeset/131516
        http://trac.webkit.org/changeset/131550
        https://bugs.webkit.org/show_bug.cgi?id=99349

        It caused zillion different problem on different platforms

        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * bytecode/CodeBlock.cpp:
        (JSC):
        (JSC::isGlobalResolve):
        (JSC::instructionOffsetForNth):
        (JSC::printGlobalResolveInfo):
        (JSC::CodeBlock::printStructures):
        (JSC::CodeBlock::dump):
        (JSC::CodeBlock::CodeBlock):
        (JSC::CodeBlock::visitStructures):
        (JSC::CodeBlock::finalizeUnconditionally):
        (JSC::CodeBlock::hasGlobalResolveInfoAtBytecodeOffset):
        (JSC::CodeBlock::globalResolveInfoForBytecodeOffset):
        (JSC::CodeBlock::shrinkToFit):
        * bytecode/CodeBlock.h:
        (CodeBlock):
        (JSC::CodeBlock::addGlobalResolveInstruction):
        (JSC::CodeBlock::addGlobalResolveInfo):
        (JSC::CodeBlock::globalResolveInfo):
        (JSC::CodeBlock::numberOfGlobalResolveInfos):
        (JSC::CodeBlock::globalResolveInfoCount):
        * bytecode/GlobalResolveInfo.h: Copied from Source/JavaScriptCore/bytecode/ResolveGlobalStatus.cpp.
        (JSC):
        (JSC::GlobalResolveInfo::GlobalResolveInfo):
        (GlobalResolveInfo):
        (JSC::getGlobalResolveInfoBytecodeOffset):
        * bytecode/Opcode.h:
        (JSC):
        (JSC::padOpcodeName):
        * bytecode/ResolveGlobalStatus.cpp:
        (JSC):
        (JSC::computeForStructure):
        (JSC::computeForLLInt):
        (JSC::ResolveGlobalStatus::computeFor):
        * bytecode/ResolveGlobalStatus.h:
        (JSC):
        (ResolveGlobalStatus):
        * bytecode/ResolveOperation.h: Removed.
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::ResolveResult::checkValidity):
        (JSC::ResolveResult::registerPointer):
        (JSC):
        (JSC::BytecodeGenerator::BytecodeGenerator):
        (JSC::BytecodeGenerator::resolve):
        (JSC::BytecodeGenerator::resolveConstDecl):
        (JSC::BytecodeGenerator::shouldAvoidResolveGlobal):
        (JSC::BytecodeGenerator::emitResolve):
        (JSC::BytecodeGenerator::emitResolveBase):
        (JSC::BytecodeGenerator::emitResolveBaseForPut):
        (JSC::BytecodeGenerator::emitResolveWithBase):
        (JSC::BytecodeGenerator::emitResolveWithThis):
        (JSC::BytecodeGenerator::emitGetStaticVar):
        (JSC::BytecodeGenerator::emitInitGlobalConst):
        (JSC::BytecodeGenerator::emitPutStaticVar):
        * bytecompiler/BytecodeGenerator.h:
        (JSC::ResolveResult::registerResolve):
        (JSC::ResolveResult::dynamicResolve):
        (JSC::ResolveResult::lexicalResolve):
        (JSC::ResolveResult::indexedGlobalResolve):
        (JSC::ResolveResult::dynamicIndexedGlobalResolve):
        (JSC::ResolveResult::globalResolve):
        (JSC::ResolveResult::dynamicGlobalResolve):
        (JSC::ResolveResult::type):
        (JSC::ResolveResult::index):
        (JSC::ResolveResult::depth):
        (JSC::ResolveResult::globalObject):
        (ResolveResult):
        (JSC::ResolveResult::isStatic):
        (JSC::ResolveResult::isIndexed):
        (JSC::ResolveResult::isScoped):
        (JSC::ResolveResult::isGlobal):
        (JSC::ResolveResult::ResolveResult):
        (BytecodeGenerator):
        * bytecompiler/NodesCodegen.cpp:
        (JSC::ResolveNode::isPure):
        (JSC::FunctionCallResolveNode::emitBytecode):
        (JSC::PostfixNode::emitResolve):
        (JSC::PrefixNode::emitResolve):
        (JSC::ReadModifyResolveNode::emitBytecode):
        (JSC::AssignResolveNode::emitBytecode):
        (JSC::ConstDeclNode::emitCodeSingle):
        (JSC::ForInNode::emitBytecode):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGByteCodeParser.cpp:
        (ByteCodeParser):
        (InlineStackEntry):
        (JSC::DFG::ByteCodeParser::handleGetByOffset):
        (JSC::DFG::ByteCodeParser::parseBlock):
        (JSC::DFG::ByteCodeParser::InlineStackEntry::InlineStackEntry):
        * dfg/DFGCapabilities.h:
        (JSC::DFG::canCompileOpcode):
        (JSC::DFG::canInlineOpcode):
        * dfg/DFGGraph.h:
        (ResolveGlobalData):
        (DFG):
        (Graph):
        * dfg/DFGNode.h:
        (JSC::DFG::Node::hasIdentifier):
        * dfg/DFGNodeType.h:
        (DFG):
        * dfg/DFGOSRExit.cpp:
        (JSC::DFG::OSRExit::OSRExit):
        * dfg/DFGOSRExit.h:
        (OSRExit):
        * dfg/DFGOSRExitCompiler.cpp:
        * dfg/DFGOSRExitCompiler32_64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOperations.cpp:
        * dfg/DFGOperations.h:
        (JSC):
        * dfg/DFGPredictionPropagationPhase.cpp:
        (JSC::DFG::PredictionPropagationPhase::propagate):
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::tryCacheGetByID):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::convertLastOSRExitToForward):
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::callOperation):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGStructureCheckHoistingPhase.cpp:
        (JSC::DFG::StructureCheckHoistingPhase::run):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompileMainPass):
        (JSC::JIT::privateCompileSlowCases):
        * jit/JIT.h:
        (JIT):
        (JSC::JIT::emit_op_get_global_var_watchable):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_op_resolve):
        (JSC):
        (JSC::JIT::emit_op_resolve_base):
        (JSC::JIT::emit_op_resolve_skip):
        (JSC::JIT::emit_op_resolve_global):
        (JSC::JIT::emitSlow_op_resolve_global):
        (JSC::JIT::emit_op_resolve_with_base):
        (JSC::JIT::emit_op_resolve_with_this):
        (JSC::JIT::emit_op_resolve_global_dynamic):
        (JSC::JIT::emitSlow_op_resolve_global_dynamic):
        * jit/JITOpcodes32_64.cpp:
        (JSC::JIT::emit_op_resolve):
        (JSC):
        (JSC::JIT::emit_op_resolve_base):
        (JSC::JIT::emit_op_resolve_skip):
        (JSC::JIT::emit_op_resolve_global):
        (JSC::JIT::emitSlow_op_resolve_global):
        (JSC::JIT::emit_op_resolve_with_base):
        (JSC::JIT::emit_op_resolve_with_this):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emit_op_get_scoped_var):
        (JSC):
        (JSC::JIT::emit_op_put_scoped_var):
        (JSC::JIT::emit_op_get_global_var):
        (JSC::JIT::emit_op_put_global_var):
        (JSC::JIT::emit_op_put_global_var_check):
        (JSC::JIT::emitSlow_op_put_global_var_check):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::emit_op_get_scoped_var):
        (JSC):
        (JSC::JIT::emit_op_put_scoped_var):
        (JSC::JIT::emit_op_get_global_var):
        (JSC::JIT::emit_op_put_global_var):
        (JSC::JIT::emit_op_put_global_var_check):
        (JSC::JIT::emitSlow_op_put_global_var_check):
        * jit/JITStubs.cpp:
        (JSC::DEFINE_STUB_FUNCTION):
        (JSC):
        * jit/JITStubs.h:
        * llint/LLIntSlowPaths.cpp:
        (LLInt):
        (JSC::LLInt::LLINT_SLOW_PATH_DECL):
        * llint/LLIntSlowPaths.h:
        (LLInt):
        * llint/LowLevelInterpreter.asm:
        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm:
        * runtime/JSScope.cpp:
        (JSC::JSScope::resolve):
        (JSC::JSScope::resolveSkip):
        (JSC::JSScope::resolveGlobal):
        (JSC::JSScope::resolveGlobalDynamic):
        (JSC::JSScope::resolveBase):
        (JSC::JSScope::resolveWithBase):
        (JSC::JSScope::resolveWithThis):
        * runtime/JSScope.h:
        (JSScope):
        * runtime/JSVariableObject.cpp:
        * runtime/JSVariableObject.h:
        * runtime/Structure.h:

2012-10-16  Dongwoo Joshua Im  <dw.im@samsung.com>

        [GTK] Fix build break - ResolveOperations.h is not in WebKit.
        https://bugs.webkit.org/show_bug.cgi?id=99538

        Unreviewed build fix.

        There are some files including ResolveOperations.h which is not exist at all.

        * GNUmakefile.list.am: s/ResolveOperations.h/ResolveOperation.h/
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj: s/ResolveOperations.h/ResolveOperation.h/

2012-10-16  Jian Li  <jianli@chromium.org>

        Rename feature define ENABLE_WIDGET_REGION to ENABLE_DRAGGBALE_REGION
        https://bugs.webkit.org/show_bug.cgi?id=98975

        Reviewed by Adam Barth.

        Renaming is needed to better match with the draggable region code. 

        * Configurations/FeatureDefines.xcconfig:

2012-10-15  Oliver Hunt  <oliver@apple.com>

        Bytecode should not have responsibility for determining how to perform non-local resolves
        https://bugs.webkit.org/show_bug.cgi?id=99349

        Reviewed by Gavin Barraclough.

        This patch removes lexical analysis from the bytecode generation.  This allows
        us to delay lookup of a non-local variables until the lookup is actually necessary,
        and simplifies a lot of the resolve logic in BytecodeGenerator.

        Once a lookup is performed we cache the lookup information in a set of out-of-line
        buffers in CodeBlock.  This allows subsequent lookups to avoid unnecessary hashing,
        etc, and allows the respective JITs to recreated optimal lookup code.

        This is currently still a performance regression in LLInt, but most of the remaining
        regression is caused by a lot of indirection that I'll remove in future work, as well
        as some work necessary to allow LLInt to perform in line instruction repatching.
        We will also want to improve the behaviour of the baseline JIT for some of the lookup
        operations, however this patch was getting quite large already so I'm landing it now
        that we've reached the bar of "performance-neutral".

        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::printStructures):
        (JSC::CodeBlock::dump):
        (JSC::CodeBlock::CodeBlock):
        (JSC::CodeBlock::visitStructures):
        (JSC):
        (JSC::CodeBlock::finalizeUnconditionally):
        (JSC::CodeBlock::shrinkToFit):
        * bytecode/CodeBlock.h:
        (JSC::CodeBlock::addResolve):
        (JSC::CodeBlock::addPutToBase):
        (CodeBlock):
        (JSC::CodeBlock::resolveOperations):
        (JSC::CodeBlock::putToBaseOperation):
        (JSC::CodeBlock::numberOfResolveOperations):
        (JSC::CodeBlock::numberOfPutToBaseOperations):
        (JSC::CodeBlock::addPropertyAccessInstruction):
        (JSC::CodeBlock::globalObjectConstant):
        (JSC::CodeBlock::setGlobalObjectConstant):
        * bytecode/GlobalResolveInfo.h: Removed.
        * bytecode/Opcode.h:
        (JSC):
        (JSC::padOpcodeName):
        * bytecode/ResolveGlobalStatus.cpp:
        (JSC::computeForStructure):
        (JSC::ResolveGlobalStatus::computeFor):
        * bytecode/ResolveGlobalStatus.h:
        (JSC):
        (ResolveGlobalStatus):
        * bytecode/ResolveOperation.h: Added.
          The new types and logic we use to perform the cached lookups.
        (JSC):
        (ResolveOperation):
        (JSC::ResolveOperation::getAndReturnScopedVar):
        (JSC::ResolveOperation::checkForDynamicEntriesBeforeGlobalScope):
        (JSC::ResolveOperation::getAndReturnGlobalVar):
        (JSC::ResolveOperation::getAndReturnGlobalProperty):
        (JSC::ResolveOperation::resolveFail):
        (JSC::ResolveOperation::skipTopScopeNode):
        (JSC::ResolveOperation::skipScopes):
        (JSC::ResolveOperation::returnGlobalObjectAsBase):
        (JSC::ResolveOperation::setBaseToGlobal):
        (JSC::ResolveOperation::setBaseToUndefined):
        (JSC::ResolveOperation::setBaseToScope):
        (JSC::ResolveOperation::returnScopeAsBase):
        (JSC::PutToBaseOperation::PutToBaseOperation):
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::ResolveResult::checkValidity):
        (JSC):
        (JSC::BytecodeGenerator::BytecodeGenerator):
        (JSC::BytecodeGenerator::resolve):
        (JSC::BytecodeGenerator::resolveConstDecl):
        (JSC::BytecodeGenerator::shouldAvoidResolveGlobal):
        (JSC::BytecodeGenerator::emitResolve):
        (JSC::BytecodeGenerator::emitResolveBase):
        (JSC::BytecodeGenerator::emitResolveBaseForPut):
        (JSC::BytecodeGenerator::emitResolveWithBaseForPut):
        (JSC::BytecodeGenerator::emitResolveWithThis):
        (JSC::BytecodeGenerator::emitGetLocalVar):
        (JSC::BytecodeGenerator::emitInitGlobalConst):
        (JSC::BytecodeGenerator::emitPutToBase):
        * bytecompiler/BytecodeGenerator.h:
        (JSC::ResolveResult::registerResolve):
        (JSC::ResolveResult::dynamicResolve):
        (ResolveResult):
        (JSC::ResolveResult::ResolveResult):
        (JSC):
        (NonlocalResolveInfo):
        (JSC::NonlocalResolveInfo::NonlocalResolveInfo):
        (JSC::NonlocalResolveInfo::~NonlocalResolveInfo):
        (JSC::NonlocalResolveInfo::resolved):
        (JSC::NonlocalResolveInfo::put):
        (BytecodeGenerator):
        (JSC::BytecodeGenerator::getResolveOperations):
        (JSC::BytecodeGenerator::getResolveWithThisOperations):
        (JSC::BytecodeGenerator::getResolveBaseOperations):
        (JSC::BytecodeGenerator::getResolveBaseForPutOperations):
        (JSC::BytecodeGenerator::getResolveWithBaseForPutOperations):
        (JSC::BytecodeGenerator::getPutToBaseOperation):
        * bytecompiler/NodesCodegen.cpp:
        (JSC::ResolveNode::isPure):
        (JSC::FunctionCallResolveNode::emitBytecode):
        (JSC::PostfixNode::emitResolve):
        (JSC::PrefixNode::emitResolve):
        (JSC::ReadModifyResolveNode::emitBytecode):
        (JSC::AssignResolveNode::emitBytecode):
        (JSC::ConstDeclNode::emitCodeSingle):
        (JSC::ForInNode::emitBytecode):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGByteCodeParser.cpp:
        (ByteCodeParser):
        (InlineStackEntry):
        (JSC::DFG::ByteCodeParser::handleGetByOffset):
        (DFG):
        (JSC::DFG::ByteCodeParser::parseResolveOperations):
        (JSC::DFG::ByteCodeParser::parseBlock):
        (JSC::DFG::ByteCodeParser::InlineStackEntry::InlineStackEntry):
        * dfg/DFGCapabilities.h:
        (JSC::DFG::canCompileResolveOperations):
        (DFG):
        (JSC::DFG::canCompilePutToBaseOperation):
        (JSC::DFG::canCompileOpcode):
        (JSC::DFG::canInlineOpcode):
        * dfg/DFGGraph.h:
        (ResolveGlobalData):
        (ResolveOperationData):
        (DFG):
        (PutToBaseOperationData):
        (Graph):
        * dfg/DFGNode.h:
        (JSC::DFG::Node::hasIdentifier):
        (JSC::DFG::Node::resolveOperationsDataIndex):
        (Node):
        * dfg/DFGNodeType.h:
        (DFG):
        * dfg/DFGOSRExit.cpp:
        (JSC::DFG::OSRExit::OSRExit):
        * dfg/DFGOSRExit.h:
        (OSRExit):
        * dfg/DFGOSRExitCompiler.cpp:
        * dfg/DFGOSRExitCompiler32_64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOperations.cpp:
        * dfg/DFGOperations.h:
        * dfg/DFGPredictionPropagationPhase.cpp:
        (JSC::DFG::PredictionPropagationPhase::propagate):
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::tryCacheGetByID):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::convertLastOSRExitToForward):
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::resolveOperations):
        (SpeculativeJIT):
        (JSC::DFG::SpeculativeJIT::putToBaseOperation):
        (JSC::DFG::SpeculativeJIT::callOperation):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGStructureCheckHoistingPhase.cpp:
        (JSC::DFG::StructureCheckHoistingPhase::run):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompileMainPass):
        (JSC::JIT::privateCompileSlowCases):
        * jit/JIT.h:
        (JIT):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emit_op_put_to_base):
        (JSC):
        (JSC::JIT::emit_resolve_operations):
        (JSC::JIT::emitSlow_link_resolve_operations):
        (JSC::JIT::emit_op_resolve):
        (JSC::JIT::emitSlow_op_resolve):
        (JSC::JIT::emit_op_resolve_base):
        (JSC::JIT::emitSlow_op_resolve_base):
        (JSC::JIT::emit_op_resolve_with_base):
        (JSC::JIT::emitSlow_op_resolve_with_base):
        (JSC::JIT::emit_op_resolve_with_this):
        (JSC::JIT::emitSlow_op_resolve_with_this):
        (JSC::JIT::emitSlow_op_put_to_base):
        * jit/JITOpcodes32_64.cpp:
        (JSC::JIT::emit_op_put_to_base):
        (JSC):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emit_op_init_global_const):
        (JSC::JIT::emit_op_init_global_const_check):
        (JSC::JIT::emitSlow_op_init_global_const_check):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::emit_op_init_global_const):
        (JSC::JIT::emit_op_init_global_const_check):
        (JSC::JIT::emitSlow_op_init_global_const_check):
        * jit/JITStubs.cpp:
        (JSC::DEFINE_STUB_FUNCTION):
        (JSC):
        * jit/JITStubs.h:
        * llint/LLIntSlowPaths.cpp:
        (LLInt):
        (JSC::LLInt::LLINT_SLOW_PATH_DECL):
        * llint/LLIntSlowPaths.h:
        (LLInt):
        * llint/LowLevelInterpreter.asm:
        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm:
        * runtime/JSScope.cpp:
        (JSC::LookupResult::base):
        (JSC::LookupResult::value):
        (JSC::LookupResult::setBase):
        (JSC::LookupResult::setValue):
        (LookupResult):
        (JSC):
        (JSC::setPutPropertyAccessOffset):
        (JSC::executeResolveOperations):
        (JSC::JSScope::resolveContainingScopeInternal):
        (JSC::JSScope::resolveContainingScope):
        (JSC::JSScope::resolve):
        (JSC::JSScope::resolveBase):
        (JSC::JSScope::resolveWithBase):
        (JSC::JSScope::resolveWithThis):
        (JSC::JSScope::resolvePut):
        (JSC::JSScope::resolveGlobal):
        * runtime/JSScope.h:
        (JSScope):
        * runtime/JSVariableObject.cpp:
        (JSC):
        * runtime/JSVariableObject.h:
        (JSVariableObject):
        * runtime/Structure.h:
        (JSC::Structure::propertyAccessesAreCacheable):
        (Structure):

2012-10-16  Filip Pizlo  <fpizlo@apple.com>

        Accidental switch fall-through in DFG::FixupPhase
        https://bugs.webkit.org/show_bug.cgi?id=96956
        <rdar://problem/12313242>

        Reviewed by Mark Hahnenberg.

        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::fixupNode):

2012-10-16  Filip Pizlo  <fpizlo@apple.com>

        GetScopedVar CSE matches dead GetScopedVar's leading to IR corruption
        https://bugs.webkit.org/show_bug.cgi?id=99470
        <rdar://problem/12363698>

        Reviewed by Mark Hahnenberg.

        All it takes is to follow the "if (!shouldGenerate) continue" idiom and everything will be OK.

        * dfg/DFGCSEPhase.cpp:
        (JSC::DFG::CSEPhase::globalVarLoadElimination):
        (JSC::DFG::CSEPhase::scopedVarLoadElimination):
        (JSC::DFG::CSEPhase::globalVarWatchpointElimination):
        (JSC::DFG::CSEPhase::getByValLoadElimination):
        (JSC::DFG::CSEPhase::checkStructureElimination):
        (JSC::DFG::CSEPhase::structureTransitionWatchpointElimination):
        (JSC::DFG::CSEPhase::getByOffsetLoadElimination):

2012-10-16  Dima Gorbik  <dgorbik@apple.com>

        Remove Platform.h include from the header files.
        https://bugs.webkit.org/show_bug.cgi?id=98665

        Reviewed by Eric Seidel.

        We don't want other clients that include WebKit headers to know about Platform.h.

        * API/tests/minidom.c:
        * API/tests/testapi.c:

2012-10-16  Balazs Kilvady  <kilvadyb@homejinni.com>

        Add missing MIPS functions to assembler.
        https://bugs.webkit.org/show_bug.cgi?id=98856

        Reviewed by Oliver Hunt.

        Implement missing functions in MacroAssemblerMIPS and MIPSAssembler.

        * assembler/MIPSAssembler.h:
        (JSC::MIPSAssembler::lb):
        (MIPSAssembler):
        (JSC::MIPSAssembler::lh):
        (JSC::MIPSAssembler::cvtds):
        (JSC::MIPSAssembler::cvtsd):
        (JSC::MIPSAssembler::vmov):
        * assembler/MacroAssemblerMIPS.h:
        (MacroAssemblerMIPS):
        (JSC::MacroAssemblerMIPS::load8Signed):
        (JSC::MacroAssemblerMIPS::load16Signed):
        (JSC::MacroAssemblerMIPS::moveDoubleToInts):
        (JSC::MacroAssemblerMIPS::moveIntsToDouble):
        (JSC::MacroAssemblerMIPS::loadFloat):
        (JSC::MacroAssemblerMIPS::loadDouble):
        (JSC::MacroAssemblerMIPS::storeFloat):
        (JSC::MacroAssemblerMIPS::storeDouble):
        (JSC::MacroAssemblerMIPS::addDouble):
        (JSC::MacroAssemblerMIPS::convertFloatToDouble):
        (JSC::MacroAssemblerMIPS::convertDoubleToFloat):

2012-10-16  Balazs Kilvady  <kilvadyb@homejinni.com>

        MIPS assembler coding-style fix.
        https://bugs.webkit.org/show_bug.cgi?id=99359

        Reviewed by Oliver Hunt.

        Coding style fix of existing MIPS assembler header files.

        * assembler/MIPSAssembler.h:
        (JSC::MIPSAssembler::addiu):
        (JSC::MIPSAssembler::addu):
        (JSC::MIPSAssembler::subu):
        (JSC::MIPSAssembler::mul):
        (JSC::MIPSAssembler::andInsn):
        (JSC::MIPSAssembler::andi):
        (JSC::MIPSAssembler::nor):
        (JSC::MIPSAssembler::orInsn):
        (JSC::MIPSAssembler::ori):
        (JSC::MIPSAssembler::xorInsn):
        (JSC::MIPSAssembler::xori):
        (JSC::MIPSAssembler::slt):
        (JSC::MIPSAssembler::sltu):
        (JSC::MIPSAssembler::sltiu):
        (JSC::MIPSAssembler::sll):
        (JSC::MIPSAssembler::sllv):
        (JSC::MIPSAssembler::sra):
        (JSC::MIPSAssembler::srav):
        (JSC::MIPSAssembler::srl):
        (JSC::MIPSAssembler::srlv):
        (JSC::MIPSAssembler::lbu):
        (JSC::MIPSAssembler::lw):
        (JSC::MIPSAssembler::lwl):
        (JSC::MIPSAssembler::lwr):
        (JSC::MIPSAssembler::lhu):
        (JSC::MIPSAssembler::sb):
        (JSC::MIPSAssembler::sh):
        (JSC::MIPSAssembler::sw):
        (JSC::MIPSAssembler::addd):
        (JSC::MIPSAssembler::subd):
        (JSC::MIPSAssembler::muld):
        (JSC::MIPSAssembler::divd):
        (JSC::MIPSAssembler::lwc1):
        (JSC::MIPSAssembler::ldc1):
        (JSC::MIPSAssembler::swc1):
        (JSC::MIPSAssembler::sdc1):
        (MIPSAssembler):
        (JSC::MIPSAssembler::relocateJumps):
        (JSC::MIPSAssembler::linkWithOffset):
        * assembler/MacroAssemblerMIPS.h:
        (JSC::MacroAssemblerMIPS::add32):
        (JSC::MacroAssemblerMIPS::and32):
        (JSC::MacroAssemblerMIPS::sub32):
        (MacroAssemblerMIPS):
        (JSC::MacroAssemblerMIPS::load8):
        (JSC::MacroAssemblerMIPS::load32):
        (JSC::MacroAssemblerMIPS::load32WithUnalignedHalfWords):
        (JSC::MacroAssemblerMIPS::load16):
        (JSC::MacroAssemblerMIPS::store8):
        (JSC::MacroAssemblerMIPS::store16):
        (JSC::MacroAssemblerMIPS::store32):
        (JSC::MacroAssemblerMIPS::nearCall):
        (JSC::MacroAssemblerMIPS::test8):
        (JSC::MacroAssemblerMIPS::test32):

2012-10-16  Yuqiang Xian  <yuqiang.xian@intel.com>

        Refactor MacroAssembler interfaces to differentiate the pointer operands from the 64-bit integer operands
        https://bugs.webkit.org/show_bug.cgi?id=99154

        Reviewed by Gavin Barraclough.

        In current JavaScriptCore implementation for JSVALUE64 platform (i.e.,
        the X64 platform), we assume that the JSValue size is same to the
        pointer size, and thus EncodedJSValue is simply type defined as a
        "void*". In the JIT compiler, we also take this assumption and invoke
        the same macro assembler interfaces for both JSValue and pointer
        operands. We need to differentiate the operations on pointers from the
        operations on JSValues, and let them invoking different macro
        assembler interfaces. For example, we now use the interface of
        "loadPtr" to load either a pointer or a JSValue, and we need to switch
        to using "loadPtr" to load a pointer and some new "load64" interface
        to load a JSValue. This would help us supporting other JSVALUE64
        platforms where pointer size is not necessarily 64-bits, for example
        x32 (bug #99153).

        The major modification I made is to introduce the "*64" interfaces in
        the MacroAssembler for those operations on JSValues, keep the "*Ptr"
        interfaces for those operations on real pointers, and go through all
        the JIT compiler code to correct the usage.

        This is the first part of the work, i.e, to add the *64 interfaces to
        the MacroAssembler.

        * assembler/AbstractMacroAssembler.h: Add the Imm64 interfaces.
        (AbstractMacroAssembler):
        (JSC::AbstractMacroAssembler::TrustedImm64::TrustedImm64):
        (TrustedImm64):
        (JSC::AbstractMacroAssembler::Imm64::Imm64):
        (Imm64):
        (JSC::AbstractMacroAssembler::Imm64::asTrustedImm64):
        * assembler/MacroAssembler.h: map <foo>Ptr methods to <foo>64 for X86_64.
        (MacroAssembler):
        (JSC::MacroAssembler::peek64):
        (JSC::MacroAssembler::poke):
        (JSC::MacroAssembler::poke64):
        (JSC::MacroAssembler::addPtr):
        (JSC::MacroAssembler::andPtr):
        (JSC::MacroAssembler::negPtr):
        (JSC::MacroAssembler::orPtr):
        (JSC::MacroAssembler::rotateRightPtr):
        (JSC::MacroAssembler::subPtr):
        (JSC::MacroAssembler::xorPtr):
        (JSC::MacroAssembler::loadPtr):
        (JSC::MacroAssembler::loadPtrWithAddressOffsetPatch):
        (JSC::MacroAssembler::loadPtrWithCompactAddressOffsetPatch):
        (JSC::MacroAssembler::storePtr):
        (JSC::MacroAssembler::storePtrWithAddressOffsetPatch):
        (JSC::MacroAssembler::movePtrToDouble):
        (JSC::MacroAssembler::moveDoubleToPtr):
        (JSC::MacroAssembler::comparePtr):
        (JSC::MacroAssembler::testPtr):
        (JSC::MacroAssembler::branchPtr):
        (JSC::MacroAssembler::branchTestPtr):
        (JSC::MacroAssembler::branchAddPtr):
        (JSC::MacroAssembler::branchSubPtr):
        (JSC::MacroAssembler::shouldBlindDouble):
        (JSC::MacroAssembler::shouldBlind):
        (JSC::MacroAssembler::RotatedImm64::RotatedImm64):
        (RotatedImm64):
        (JSC::MacroAssembler::rotationBlindConstant):
        (JSC::MacroAssembler::loadRotationBlindedConstant):
        (JSC::MacroAssembler::move):
        (JSC::MacroAssembler::and64):
        (JSC::MacroAssembler::store64):
        * assembler/MacroAssemblerX86Common.h:
        (JSC::MacroAssemblerX86Common::shouldBlindForSpecificArch):
        (MacroAssemblerX86Common):
        (JSC::MacroAssemblerX86Common::move):
        * assembler/MacroAssemblerX86_64.h: Add the <foo>64 methods for X86_64.
        (JSC::MacroAssemblerX86_64::branchAdd32):
        (JSC::MacroAssemblerX86_64::add64):
        (MacroAssemblerX86_64):
        (JSC::MacroAssemblerX86_64::and64):
        (JSC::MacroAssemblerX86_64::neg64):
        (JSC::MacroAssemblerX86_64::or64):
        (JSC::MacroAssemblerX86_64::rotateRight64):
        (JSC::MacroAssemblerX86_64::sub64):
        (JSC::MacroAssemblerX86_64::xor64):
        (JSC::MacroAssemblerX86_64::load64):
        (JSC::MacroAssemblerX86_64::load64WithAddressOffsetPatch):
        (JSC::MacroAssemblerX86_64::load64WithCompactAddressOffsetPatch):
        (JSC::MacroAssemblerX86_64::store64):
        (JSC::MacroAssemblerX86_64::store64WithAddressOffsetPatch):
        (JSC::MacroAssemblerX86_64::move64ToDouble):
        (JSC::MacroAssemblerX86_64::moveDoubleTo64):
        (JSC::MacroAssemblerX86_64::compare64):
        (JSC::MacroAssemblerX86_64::branch64):
        (JSC::MacroAssemblerX86_64::branchTest64):
        (JSC::MacroAssemblerX86_64::test64):
        (JSC::MacroAssemblerX86_64::branchAdd64):
        (JSC::MacroAssemblerX86_64::branchSub64):
        (JSC::MacroAssemblerX86_64::branchPtrWithPatch):
        (JSC::MacroAssemblerX86_64::storePtrWithPatch):

2012-10-15  Mark Hahnenberg  <mhahnenberg@apple.com>

        Make CopiedSpace and MarkedSpace regions independent
        https://bugs.webkit.org/show_bug.cgi?id=99222

        Reviewed by Filip Pizlo.

        Right now CopiedSpace and MarkedSpace have the same block size and share the same regions, 
        but there's no reason that they can't have different block sizes while still sharing the 
        same underlying regions. We should factor the two "used" lists of regions apart so that 
        MarkedBlocks and CopiedBlocks can be different sizes. Regions will still be a uniform size 
        so that when they become empty they may be shared between the CopiedSpace and the MarkedSpace, 
        since benchmarks indicate that sharing is a boon for performance.

        * heap/BlockAllocator.cpp:
        (JSC::BlockAllocator::BlockAllocator):
        * heap/BlockAllocator.h:
        (JSC):
        (Region):
        (JSC::Region::create): We now have a fixed size for Regions so that empty regions can continue to 
        be shared between the MarkedSpace and CopiedSpace. Once they are used for a specific type of block,
        however, they can only be used for that type of block until they become empty again.
        (JSC::Region::createCustomSize):
        (JSC::Region::Region):
        (JSC::Region::~Region):
        (JSC::Region::reset):
        (BlockAllocator):
        (JSC::BlockAllocator::RegionSet::RegionSet):
        (RegionSet):
        (JSC::BlockAllocator::tryAllocateFromRegion): We change this function so that it correctly 
        moves blocks between empty, partial, and full lists.
        (JSC::BlockAllocator::allocate):
        (JSC::BlockAllocator::allocateCustomSize):
        (JSC::BlockAllocator::deallocate): Ditto.
        (JSC::CopiedBlock):
        (JSC::MarkedBlock):
        (JSC::BlockAllocator::regionSetFor): We use this so that we can use the same allocate/deallocate
        functions with different RegionSets. We specialize the function for each type of block that we 
        want to allocate.
        * heap/CopiedBlock.h:
        (CopiedBlock):
        * heap/CopiedSpace.h:
        (CopiedSpace):
        * heap/HeapBlock.h:
        (HeapBlock):
        * heap/MarkedBlock.cpp:
        (JSC::MarkedBlock::MarkedBlock): For oversize MarkedBlocks, if the block size gets too big we can 
        underflow the endAtom, which will cause us to segfault when we try to sweep a block. If we're a 
        custom size MarkedBlock we need to calculate endAtom so it doesn't underflow.

2012-10-14  Filip Pizlo  <fpizlo@apple.com>

        JIT::JIT fails to initialize all of its fields
        https://bugs.webkit.org/show_bug.cgi?id=99283

        Reviewed by Andreas Kling.

        There were two groups of such fields, all of which are eventually initialized
        prior to use inside of privateCompile(). But it's safer to make sure that they
        are initialized in the constructor as well, since we may use the JIT to do a
        stub compile without calling into privateCompile().
        
        Unsigned index fields for dynamic repatching meta-data: this change
        initializes them to UINT_MAX, so we should crash if we try to use those
        indices without initializing them.
        
        Boolean flags for value profiling: this change initializes them to false, so
        we at worst turn off value profiling.

        * jit/JIT.cpp:
        (JSC::JIT::JIT):

2012-10-15  Mark Hahnenberg  <mhahnenberg@apple.com>

        We should avoid weakCompareAndSwap when parallel GC is disabled
        https://bugs.webkit.org/show_bug.cgi?id=99331

        Reviewed by Filip Pizlo.

        CopiedBlock::reportLiveBytes and didEvacuateBytes uses weakCompareAndSwap, which some platforms 
        don't support. For platforms that don't have parallel GC enabled, we should just use a normal store.

        * heap/CopiedBlock.h:
        (JSC::CopiedBlock::reportLiveBytes):
        (JSC::CopiedBlock::didEvacuateBytes):

2012-10-15  Carlos Garcia Campos  <cgarcia@igalia.com>

        Unreviewed. Fix make distcheck.

        * GNUmakefile.list.am: Add missing header file.

2012-10-14  Filip Pizlo  <fpizlo@apple.com>

        DFG should handle polymorphic array modes by eagerly transforming arrays into the most general applicable form
        https://bugs.webkit.org/show_bug.cgi?id=99269

        Reviewed by Geoffrey Garen.

        This kills off a bunch of code for "polymorphic" array modes in the DFG. It should
        also be a performance win for code that uses a lot of array storage arrays.

        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGArrayMode.cpp:
        (JSC::DFG::fromObserved):
        (JSC::DFG::modeAlreadyChecked):
        (JSC::DFG::modeToString):
        * dfg/DFGArrayMode.h:
        (DFG):
        (JSC::DFG::modeUsesButterfly):
        (JSC::DFG::modeIsJSArray):
        (JSC::DFG::mayStoreToTail):
        (JSC::DFG::mayStoreToHole):
        (JSC::DFG::canCSEStorage):
        (JSC::DFG::modeSupportsLength):
        (JSC::DFG::benefitsFromStructureCheck):
        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::checkArray):
        (JSC::DFG::FixupPhase::blessArrayOperation):
        * dfg/DFGGraph.h:
        (JSC::DFG::Graph::byValIsPure):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::jumpSlowForUnwantedArrayMode):
        (JSC::DFG::SpeculativeJIT::checkArray):
        (JSC::DFG::SpeculativeJIT::arrayify):
        (DFG):
        (JSC::DFG::SpeculativeJIT::compileGetArrayLength):
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::putByValWillNeedExtraRegister):
        (SpeculativeJIT):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):

2012-10-14  Filip Pizlo  <fpizlo@apple.com>

        REGRESSION(126886): Fat binary builds don't know how to handle architecture variants to which the LLInt is agnostic
        https://bugs.webkit.org/show_bug.cgi?id=99270

        Reviewed by Geoffrey Garen.

        The fix is to hash cons the offsets based on configuration index, not the offsets
        themselves.

        * offlineasm/offsets.rb:

2012-10-13  Filip Pizlo  <fpizlo@apple.com>

        IndexingType should not have a bit for each type
        https://bugs.webkit.org/show_bug.cgi?id=98997

        Reviewed by Oliver Hunt.

        Somewhat incidentally, the introduction of butterflies led to each indexing
        type being represented by a unique bit. This is superficially nice since it
        allows you to test if a structure corresponds to a particular indexing type
        by saying !!(structure->indexingType() & TheType). But the downside is that
        given the 8 bits we have for the m_indexingType field, that leaves only a
        small number of possible indexing types if we have one per bit.
        
        This changeset changes the indexing type to be:
        
        Bit #1: Tells you if you're an array.
        
        Bits #2 - #5: 16 possible indexing types, including the blank type for
            objects that don't have indexed properties.
        
        Bits #6-8: Auxiliary bits that we could use for other things. Currently we
            just use one of those bits, for MayHaveIndexedAccessors.
        
        This is performance-neutral, and is primarily intended to give us more
        breathing room for introducing new inferred array modes.

        * assembler/AbstractMacroAssembler.h:
        (JSC::AbstractMacroAssembler::JumpList::jumps):
        * assembler/MacroAssembler.h:
        (MacroAssembler):
        (JSC::MacroAssembler::patchableBranch32):
        * assembler/MacroAssemblerARMv7.h:
        (JSC::MacroAssemblerARMv7::patchableBranch32):
        (MacroAssemblerARMv7):
        * dfg/DFGArrayMode.cpp:
        (JSC::DFG::modeAlreadyChecked):
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::tryCacheGetByID):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::speculationCheck):
        (JSC::DFG::SpeculativeJIT::forwardSpeculationCheck):
        (JSC::DFG::SpeculativeJIT::jumpSlowForUnwantedArrayMode):
        (DFG):
        (JSC::DFG::SpeculativeJIT::checkArray):
        (JSC::DFG::SpeculativeJIT::arrayify):
        * dfg/DFGSpeculativeJIT.h:
        (SpeculativeJIT):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * jit/JITInlineMethods.h:
        (JSC::JIT::emitAllocateJSArray):
        (JSC::JIT::chooseArrayMode):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emit_op_get_by_val):
        (JSC::JIT::emitContiguousGetByVal):
        (JSC::JIT::emitArrayStorageGetByVal):
        (JSC::JIT::emit_op_put_by_val):
        (JSC::JIT::emitContiguousPutByVal):
        (JSC::JIT::emitArrayStoragePutByVal):
        (JSC::JIT::privateCompilePatchGetArrayLength):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::emit_op_get_by_val):
        (JSC::JIT::emitContiguousGetByVal):
        (JSC::JIT::emitArrayStorageGetByVal):
        (JSC::JIT::emit_op_put_by_val):
        (JSC::JIT::emitContiguousPutByVal):
        (JSC::JIT::emitArrayStoragePutByVal):
        (JSC::JIT::privateCompilePatchGetArrayLength):
        * llint/LowLevelInterpreter.asm:
        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm:
        * runtime/IndexingType.h:
        (JSC):
        (JSC::hasIndexedProperties):
        (JSC::hasContiguous):
        (JSC::hasFastArrayStorage):
        (JSC::hasArrayStorage):
        (JSC::shouldUseSlowPut):
        * runtime/JSGlobalObject.cpp:
        (JSC):
        * runtime/StructureTransitionTable.h:
        (JSC::newIndexingType):

2012-10-14  Filip Pizlo  <fpizlo@apple.com>

        DFG structure check hoisting should attempt to ignore side effects and make transformations that are sound even in their presence
        https://bugs.webkit.org/show_bug.cgi?id=99262

        Reviewed by Oliver Hunt.

        This hugely simplifies the structure check hoisting phase. It will no longer be necessary
        to modify it when the effectfulness of operations changes. This also enables the hoister
        to hoist effectful things in the future.
        
        The downside is that the hoister may end up adding strictly more checks than were present
        in the original code, if the code truly has a lot of side-effects. I don't see evidence
        of this happening. This patch does have some speed-ups and some slow-downs, but is
        neutral in the average, and the slow-downs do not appear to have more structure checks
        than ToT.

        * dfg/DFGStructureCheckHoistingPhase.cpp:
        (JSC::DFG::StructureCheckHoistingPhase::run):
        (JSC::DFG::StructureCheckHoistingPhase::noticeStructureCheck):
        (StructureCheckHoistingPhase):
        (CheckData):
        (JSC::DFG::StructureCheckHoistingPhase::CheckData::CheckData):

2012-10-14  Filip Pizlo  <fpizlo@apple.com>

        Fix the build of universal binary with ARMv7s of JavaScriptCore

        * llint/LLIntOfflineAsmConfig.h:
        * llint/LowLevelInterpreter.asm:

2012-10-13  Filip Pizlo  <fpizlo@apple.com>

        Array length array profiling is broken in the baseline JIT
        https://bugs.webkit.org/show_bug.cgi?id=99258

        Reviewed by Oliver Hunt.

        The code generator for array length stubs calls into
        emitArrayProfilingSiteForBytecodeIndex(), which emits profiling only if
        canBeOptimized() returns true. But m_canBeOptimized is only initialized during
        full method compiles, so in a stub compile it may (or may not) be false, meaning
        that we may, or may not, get meaningful profiling info.
        
        This appeared to not affect too many programs since the LLInt has good array
        length array profiling.

        * jit/JIT.h:
        (JSC::JIT::compilePatchGetArrayLength):

2012-10-14  Patrick Gansterer  <paroga@webkit.org>

        Build fix for WinCE after r131089.

        WinCE does not support getenv().

        * runtime/Options.cpp:
        (JSC::overrideOptionWithHeuristic):

2012-10-12  Kangil Han  <kangil.han@samsung.com>

        Fix build error on DFGSpeculativeJIT32_64.cpp
        https://bugs.webkit.org/show_bug.cgi?id=99234

        Reviewed by Anders Carlsson.

        Seems BUG 98608 causes build error on 32bit machine so fix it.

        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):

2012-10-12  Filip Pizlo  <fpizlo@apple.com>

        Contiguous array allocation should always be inlined
        https://bugs.webkit.org/show_bug.cgi?id=98608

        Reviewed by Oliver Hunt and Mark Hahnenberg.

        This inlines contiguous array allocation in the most obvious way possible.

        * JavaScriptCore.xcodeproj/project.pbxproj:
        * assembler/MacroAssembler.h:
        (JSC::MacroAssembler::branchSubPtr):
        (MacroAssembler):
        * assembler/MacroAssemblerX86_64.h:
        (JSC::MacroAssemblerX86_64::branchSubPtr):
        (MacroAssemblerX86_64):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGCCallHelpers.h:
        (JSC::DFG::CCallHelpers::setupArgumentsWithExecState):
        (CCallHelpers):
        * dfg/DFGCallArrayAllocatorSlowPathGenerator.h: Added.
        (DFG):
        (CallArrayAllocatorSlowPathGenerator):
        (JSC::DFG::CallArrayAllocatorSlowPathGenerator::CallArrayAllocatorSlowPathGenerator):
        (JSC::DFG::CallArrayAllocatorSlowPathGenerator::generateInternal):
        (CallArrayAllocatorWithVariableSizeSlowPathGenerator):
        (JSC::DFG::CallArrayAllocatorWithVariableSizeSlowPathGenerator::CallArrayAllocatorWithVariableSizeSlowPathGenerator):
        (JSC::DFG::CallArrayAllocatorWithVariableSizeSlowPathGenerator::generateInternal):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::emitAllocateJSArray):
        (DFG):
        (JSC::DFG::SpeculativeJIT::compileAllocatePropertyStorage):
        (JSC::DFG::SpeculativeJIT::compileReallocatePropertyStorage):
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::callOperation):
        (SpeculativeJIT):
        (JSC::DFG::SpeculativeJIT::emitAllocateBasicStorage):
        (JSC::DFG::SpeculativeJIT::emitAllocateBasicJSObject):
        (JSC::DFG::SpeculativeJIT::emitAllocateJSFinalObject):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):

2012-10-12  Mark Hahnenberg  <mhahnenberg@apple.com>

        Race condition during CopyingPhase can lead to deadlock
        https://bugs.webkit.org/show_bug.cgi?id=99226

        Reviewed by Filip Pizlo.

        The main thread calls startCopying() for each of the GCThreads at the beginning of the copy phase. 
        It then proceeds to start copying. If copying completes before one of the GCThreads wakes up, the 
        main thread will set m_currentPhase back to NoPhase, the GCThread will wake up, see that there's 
        nothing to do, and then it will go back to sleep without ever calling CopyVisitor::doneCopying() 
        to return its borrowed block to the CopiedSpace. CopiedSpace::doneCopying() will then sleep forever 
        waiting on the block.

        The fix for this is to make sure we call CopiedSpace::doneCopying() on the main thread before we 
        call GCThreadSharedData::didFinishCopying(), which sets the m_currentPhase flag to NoPhase. This 
        way we will wait until all threads have woken up and given back their borrowed blocks before 
        clearing the flag.

        * heap/Heap.cpp:
        (JSC::Heap::copyBackingStores):

2012-10-12  Anders Carlsson  <andersca@apple.com>

        Move macros from Parser.h to Parser.cpp
        https://bugs.webkit.org/show_bug.cgi?id=99217

        Reviewed by Andreas Kling.

        There are a bunch of macros in Parser.h that are only used in Parser.cpp. Move them to Parser.cpp
        so they won't pollute the global namespace.
        * parser/Parser.cpp:
        * parser/Parser.h:
        (JSC):

2012-10-12  Mark Hahnenberg  <mhahnenberg@apple.com>

        Another build fix after r131213

        Added some symbol magic to placate the linker on some platforms.

        * JavaScriptCore.order:

2012-10-12  Mark Hahnenberg  <mhahnenberg@apple.com>

        Build fix after r131213

        Removed an unused variable that was making compilers unhappy.

        * heap/GCThread.cpp:
        (JSC::GCThread::GCThread):
        * heap/GCThread.h:
        (GCThread):
        * heap/GCThreadSharedData.cpp:
        (JSC::GCThreadSharedData::GCThreadSharedData):

2012-10-09  Mark Hahnenberg  <mhahnenberg@apple.com>

        Copying collection shouldn't require O(live bytes) memory overhead
        https://bugs.webkit.org/show_bug.cgi?id=98792

        Reviewed by Filip Pizlo.

        Currently our copying collection occurs simultaneously with the marking phase. We'd like 
        to be able to reuse CopiedBlocks as soon as they become fully evacuated, but this is not 
        currently possible because we don't know the liveness statistics of each old CopiedBlock 
        until marking/copying has already finished. Instead, we have to allocate additional memory 
        from the OS to use as our working set of CopiedBlocks while copying. We then return the 
        fully evacuated old CopiedBlocks back to the block allocator, thus giving our copying phase 
        an O(live bytes) overhead.

        To fix this, we should instead split the copying phase apart from the marking phase. This 
        way we have full liveness data for each CopiedBlock during the copying phase so that we 
        can reuse them the instant they become fully evacuated. With the additional liveness data 
        that each CopiedBlock accumulates, we can add some additional heuristics to the collector. 
        For example, we can calculate our global Heap fragmentation and only choose to do a copying 
        phase if that fragmentation exceeds some limit. As another example, we can skip copying 
        blocks that are already above a particular fragmentation limit, which allows older objects 
        to coalesce into blocks that are rarely copied.

        * JavaScriptCore.xcodeproj/project.pbxproj:
        * heap/CopiedBlock.h:
        (CopiedBlock):
        (JSC::CopiedBlock::CopiedBlock): Added support for tracking live bytes in a CopiedBlock in a 
        thread-safe fashion.
        (JSC::CopiedBlock::reportLiveBytes): Adds a number of live bytes to the block in a thread-safe 
        fashion using compare and swap.
        (JSC):
        (JSC::CopiedBlock::didSurviveGC): Called when a block survives a single GC without being 
        evacuated. This could be called for a couple reasons: (a) the block was pinned or (b) we 
        decided not to do any copying. A block can become pinned for a few reasons: (1) a pointer into 
        the block was found during the conservative scan. (2) the block was deemed full enough to 
        not warrant any copying. (3) The block is oversize and was found to be live. 
        (JSC::CopiedBlock::didEvacuateBytes): Called when some number of bytes are copied from this 
        block. If the number of live bytes ever hits zero, the block will return itself to the 
        BlockAllocator to be recycled.
        (JSC::CopiedBlock::canBeRecycled): Indicates that a block has no live bytes and can be 
        immediately recycled. This is used for blocks that are found to have zero live bytes at the 
        beginning of the copying phase.
        (JSC::CopiedBlock::shouldEvacuate): This function returns true if the current fragmentation 
        of the block is above our fragmentation threshold, and false otherwise.
        (JSC::CopiedBlock::isPinned): Added an accessor for the pinned flag
        (JSC::CopiedBlock::liveBytes): 
        * heap/CopiedSpace.cpp:
        (JSC::CopiedSpace::CopiedSpace):
        (JSC::CopiedSpace::doneFillingBlock): Changed so that we can exchange our filled block for a 
        fresh block. This avoids the situation where a thread returns its borrowed block, it's the last 
        borrowed block, so CopiedSpace thinks that copying has completed, and it starts doing all of the 
        copying phase cleanup. In actuality, the thread wanted another block after returning the current 
        block. So we allow the thread to atomically exchange its block for another block.
        (JSC::CopiedSpace::startedCopying): Added the calculation of global Heap fragmentation to 
        determine if the copying phase should commence. We include the MarkedSpace in our fragmentation 
        calculation by assuming that the MarkedSpace is 0% fragmented since we can reuse any currently 
        free memory in it (i.e. we ignore any internal fragmentation in the MarkedSpace). While we're 
        calculating the fragmentation of CopiedSpace, we also return any free blocks we find along the 
        way (meaning liveBytes() == 0).
        (JSC):
        (JSC::CopiedSpace::doneCopying): We still have to iterate over all the blocks, regardless of
        whether the copying phase took place or not so that we can reset all of the live bytes counters 
        and un-pin any pinned blocks.
        * heap/CopiedSpace.h:
        (CopiedSpace):
        (JSC::CopiedSpace::shouldDoCopyPhase):
        * heap/CopiedSpaceInlineMethods.h:
        (JSC::CopiedSpace::recycleEvacuatedBlock): This function is distinct from recycling a borrowed block 
        because a borrowed block hasn't been added to the CopiedSpace yet, but an evacuated block is still
        currently in CopiedSpace, so we have to make sure we properly remove all traces of the block from 
        CopiedSpace before returning it to BlockAllocator.
        (JSC::CopiedSpace::recycleBorrowedBlock): Renamed to indicate the distinction mentioned above.
        * heap/CopyVisitor.cpp: Added.
        (JSC):
        (JSC::CopyVisitor::CopyVisitor):
        (JSC::CopyVisitor::copyFromShared): Main function for any thread participating in the copying phase.
        Grabs chunks of MarkedBlocks from the shared list and copies the backing store of anybody who needs
        it until there are no more chunks to copy.
        * heap/CopyVisitor.h: Added.
        (JSC):
        (CopyVisitor):
        * heap/CopyVisitorInlineMethods.h: Added.
        (JSC):
        (GCCopyPhaseFunctor):
        (JSC::GCCopyPhaseFunctor::GCCopyPhaseFunctor):
        (JSC::GCCopyPhaseFunctor::operator()):
        (JSC::CopyVisitor::checkIfShouldCopy): We don't have to check shouldEvacuate() because all of those 
        checks are done during the marking phase.
        (JSC::CopyVisitor::allocateNewSpace): 
        (JSC::CopyVisitor::allocateNewSpaceSlow):
        (JSC::CopyVisitor::startCopying): Initialization function for a thread that is about to start copying.
        (JSC::CopyVisitor::doneCopying):
        (JSC::CopyVisitor::didCopy): This callback is called by an object that has just successfully copied its
        backing store. It indicates to the CopiedBlock that somebody has just finished evacuating some number of 
        bytes from it, and, if the CopiedBlock now has no more live bytes, can be recycled immediately.
        * heap/GCThread.cpp: Added.
        (JSC):
        (JSC::GCThread::GCThread): This is a new class that encapsulates a single thread responsible for participating 
        in a specific set of GC phases. Currently, that set of phases includes Mark, Copy, and Exit. Each thread 
        monitors a shared variable in its associated GCThreadSharedData. The main thread updates this m_currentPhase
        variable as collection progresses through the various phases. Parallel marking still works exactly like it 
        has. In other words, the "run loop" for each of the GC threads sits above any individual phase, thus keeping 
        the separate phases of the collector orthogonal.
        (JSC::GCThread::threadID):
        (JSC::GCThread::initializeThreadID):
        (JSC::GCThread::slotVisitor):
        (JSC::GCThread::copyVisitor):
        (JSC::GCThread::waitForNextPhase):
        (JSC::GCThread::gcThreadMain):
        (JSC::GCThread::gcThreadStartFunc):
        * heap/GCThread.h: Added.
        (JSC):
        (GCThread):
        * heap/GCThreadSharedData.cpp: The GCThreadSharedData now has a list of GCThread objects rather than raw 
        ThreadIdentifiers.
        (JSC::GCThreadSharedData::resetChildren):
        (JSC::GCThreadSharedData::childVisitCount):
        (JSC::GCThreadSharedData::GCThreadSharedData):
        (JSC::GCThreadSharedData::~GCThreadSharedData):
        (JSC::GCThreadSharedData::reset):
        (JSC::GCThreadSharedData::didStartMarking): Callback to let the GCThreadSharedData know that marking has 
        started and updates the m_currentPhase variable and notifies the GCThreads accordingly.
        (JSC::GCThreadSharedData::didFinishMarking): Ditto for finishing marking. 
        (JSC::GCThreadSharedData::didStartCopying): Ditto for starting the copying phase.
        (JSC::GCThreadSharedData::didFinishCopying): Ditto for finishing copying. 
        * heap/GCThreadSharedData.h:
        (JSC):
        (GCThreadSharedData):
        (JSC::GCThreadSharedData::getNextBlocksToCopy): Atomically gets the next chunk of work for a copying thread.
        * heap/Heap.cpp:
        (JSC::Heap::Heap):
        (JSC::Heap::markRoots):
        (JSC):
        (JSC::Heap::copyBackingStores): Responsible for setting up the copying phase, notifying the copying threads, 
        and doing any copying work if necessary.
        (JSC::Heap::collect):
        * heap/Heap.h:
        (Heap):
        (JSC):
        (JSC::CopyFunctor::CopyFunctor):
        (CopyFunctor):
        (JSC::CopyFunctor::operator()):
        * heap/IncrementalSweeper.cpp: Changed the incremental sweeper to have a reference to the list of MarkedBlocks 
        that need sweeping, since this now resides in the Heap so that it can be easily shared by the GCThreads.
        (JSC::IncrementalSweeper::IncrementalSweeper):
        (JSC::IncrementalSweeper::startSweeping):
        * heap/IncrementalSweeper.h:
        (JSC):
        (IncrementalSweeper):
        * heap/SlotVisitor.cpp:
        (JSC::SlotVisitor::setup):
        (JSC::SlotVisitor::drainFromShared): We no longer do any copying-related work here.
        (JSC):
        * heap/SlotVisitor.h:
        (SlotVisitor):
        * heap/SlotVisitorInlineMethods.h:
        (JSC):
        (JSC::SlotVisitor::copyLater): Notifies the CopiedBlock that there are some live bytes that may need 
        to be copied.
        * runtime/Butterfly.h:
        (JSC):
        (Butterfly):
        * runtime/ButterflyInlineMethods.h:
        (JSC::Butterfly::createUninitializedDuringCollection): Uses the new CopyVisitor.
        * runtime/ClassInfo.h:
        (MethodTable): Added new "virtual" function copyBackingStore to method table.
        (JSC):
        * runtime/JSCell.cpp:
        (JSC::JSCell::copyBackingStore): Default implementation that does nothing.
        (JSC):
        * runtime/JSCell.h:
        (JSC):
        (JSCell):
        * runtime/JSObject.cpp:
        (JSC::JSObject::copyButterfly): Does the actual copying of the butterfly.
        (JSC):
        (JSC::JSObject::visitButterfly): Calls copyLater for the butterfly.
        (JSC::JSObject::copyBackingStore): 
        * runtime/JSObject.h:
        (JSObject):
        (JSC::JSCell::methodTable):
        (JSC::JSCell::inherits):
        * runtime/Options.h: Added two new constants, minHeapUtilization and minCopiedBlockUtilization, 
        to govern the amount of fragmentation we allow before doing copying.
        (JSC):

2012-10-12  Filip Pizlo  <fpizlo@apple.com>

        DFG array allocation calls should not return an encoded JSValue
        https://bugs.webkit.org/show_bug.cgi?id=99196

        Reviewed by Mark Hahnenberg.

        The array allocation operations now return a pointer instead. This makes it
        easier to share code between 32-bit and 64-bit.

        * dfg/DFGOperations.cpp:
        * dfg/DFGOperations.h:
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::callOperation):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):

2012-10-01  Jer Noble  <jer.noble@apple.com>

        Enable ENCRYPTED_MEDIA support on Mac.
        https://bugs.webkit.org/show_bug.cgi?id=98044

        Reviewed by Anders Carlsson.

        Enable the ENCRYPTED_MEDIA flag.

        * Configurations/FeatureDefines.xcconfig:

2012-10-12  Filip Pizlo  <fpizlo@apple.com>

        Unreviewed. It should be possible to build JSC on ARMv7.

        * assembler/MacroAssemblerARMv7.h:
        (JSC::MacroAssemblerARMv7::patchableBranchPtr):

2012-10-11  Mark Hahnenberg  <mhahnenberg@apple.com>

        BlockAllocator should use regions as its VM allocation abstraction
        https://bugs.webkit.org/show_bug.cgi?id=99107

        Reviewed by Geoffrey Garen.

        Currently the BlockAllocator allocates a single block at a time directly from the OS. Our block 
        allocations are on the large-ish side (64 KB) to amortize across many allocations the expense of 
        mapping new virtual memory from the OS. These large blocks are then shared between the MarkedSpace 
        and the CopiedSpace. This design makes it difficult to vary the size of the blocks in different 
        parts of the Heap while still allowing us to amortize the VM allocation costs.

        We should redesign the BlockAllocator so that it has a layer of indirection between blocks that are 
        used by the allocator/collector and our primary unit of VM allocation from the OS. In particular, 
        the BlockAllocator should allocate Regions of virtual memory from the OS, which are then subdivided 
        into one or more Blocks to be used in our custom allocators. This design has the following nice properties:

        1) We can remove the knowledge of PageAllocationAligned from HeapBlocks. Each HeapBlock will now 
           only know what Region it belongs to. The Region maintains all the metadata for how to allocate 
           and deallocate virtual memory from the OS.

        2) We can easily allocate in larger chunks than we need to satisfy a particular request for a Block. 
           We can then continue to amortize our VM allocation costs while allowing for smaller block sizes, 
           which should increase locality in the mutator when allocating, lazy sweeping, etc.

        3) By encapsulating the logic of where our memory comes from inside of the Region class, we can more 
           easily transition over to allocating VM from a specific range of pre-reserved address space. This 
           will be a necessary step along the way to 32-bit pointers.

        This particular patch will not change the size of MarkedBlocks or CopiedBlocks, nor will it change how 
        much VM we allocate per failed Block request. It only sets up the data structures that we need to make 
        these changes in future patches.

        Most of the changes in this patch relate to the addition of the Region class to be used by the 
        BlockAllocator and the threading of changes made to BlockAllocator's interface through to the call sites.

        * heap/BlockAllocator.cpp: The BlockAllocator now has three lists that track the three disjoint sets of
        Regions that it cares about: empty regions, partially full regions, and completely full regions. 
        Empty regions have no blocks currently in use and can be freed immediately if the freeing thread 
        determines they should be. Partial regions have some blocks used, but aren't completely in use yet. 
        These regions are preferred for recycling before empty regions to mitigate fragmentation within regions.
        Completely full regions are no longer able to be used for allocations. Regions move between these 
        three lists as they are created and their constituent blocks are allocated and deallocated.
        (JSC::BlockAllocator::BlockAllocator):
        (JSC::BlockAllocator::~BlockAllocator):
        (JSC::BlockAllocator::releaseFreeRegions):
        (JSC::BlockAllocator::waitForRelativeTimeWhileHoldingLock):
        (JSC::BlockAllocator::waitForRelativeTime):
        (JSC::BlockAllocator::blockFreeingThreadMain):
        * heap/BlockAllocator.h:
        (JSC):
        (DeadBlock):
        (JSC::DeadBlock::DeadBlock):
        (Region):
        (JSC::Region::blockSize):
        (JSC::Region::isFull):
        (JSC::Region::isEmpty):
        (JSC::Region::create): This function is responsible for doing the actual VM allocation. This should be the 
        only function in the entire JSC object runtime that calls out the OS for virtual memory allocation.
        (JSC::Region::Region):
        (JSC::Region::~Region):
        (JSC::Region::allocate):
        (JSC::Region::deallocate):
        (BlockAllocator):
        (JSC::BlockAllocator::tryAllocateFromRegion): Helper function that encapsulates checking a particular list 
        of regions for a free block.
        (JSC::BlockAllocator::allocate):
        (JSC::BlockAllocator::allocateCustomSize): This function is responsible for allocating one-off custom size 
        regions for use in oversize allocations in both the MarkedSpace and the CopiedSpace. These regions are not 
        tracked by the BlockAllocator. The only pointer to them is in the HeapBlock that is returned. These regions 
        contain exactly one block.
        (JSC::BlockAllocator::deallocate):
        (JSC::BlockAllocator::deallocateCustomSize): This function is responsible for deallocating one-off custom size
        regions. The regions are deallocated back to the OS eagerly.
        * heap/CopiedBlock.h: Re-worked CopiedBlocks to use Regions instead of PageAllocationAligned.
        (CopiedBlock):
        (JSC::CopiedBlock::createNoZeroFill):
        (JSC::CopiedBlock::create):
        (JSC::CopiedBlock::CopiedBlock):
        (JSC::CopiedBlock::payloadEnd):
        (JSC::CopiedBlock::capacity):
        * heap/CopiedSpace.cpp:
        (JSC::CopiedSpace::~CopiedSpace):
        (JSC::CopiedSpace::tryAllocateOversize):
        (JSC::CopiedSpace::tryReallocateOversize):
        (JSC::CopiedSpace::doneCopying):
        * heap/CopiedSpaceInlineMethods.h:
        (JSC::CopiedSpace::allocateBlockForCopyingPhase):
        (JSC::CopiedSpace::allocateBlock):
        * heap/HeapBlock.h:
        (JSC::HeapBlock::destroy):
        (JSC::HeapBlock::HeapBlock):
        (JSC::HeapBlock::region):
        (HeapBlock):
        * heap/MarkedAllocator.cpp:
        (JSC::MarkedAllocator::allocateBlock):
        * heap/MarkedBlock.cpp:
        (JSC::MarkedBlock::create):
        (JSC::MarkedBlock::MarkedBlock):
        * heap/MarkedBlock.h:
        (JSC::MarkedBlock::capacity):
        * heap/MarkedSpace.cpp:
        (JSC::MarkedSpace::freeBlock):

2012-10-11  Filip Pizlo  <fpizlo@apple.com>

        UInt32ToNumber and OSR exit should be aware of copy propagation and correctly recover both versions of a variable that was subject to a UInt32ToNumber cast
        https://bugs.webkit.org/show_bug.cgi?id=99100
        <rdar://problem/12480955>

        Reviewed by Michael Saboff and Mark Hahnenberg.

        Fixed by forcing UInt32ToNumber to use a different register. This "undoes" the copy propagation that we
        would have been doing, since it has no performance effect in this case and has the benefit of making the
        OSR exit compiler a lot simpler.

        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::compileUInt32ToNumber):

2012-10-11  Geoffrey Garen  <ggaren@apple.com>

        Removed some more static assumptions about inline object capacity
        https://bugs.webkit.org/show_bug.cgi?id=98603

        Reviewed by Filip Pizlo.

        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::emitAllocateBasicJSObject): Use JSObject::allocationSize()
        for a little more flexibility. We still pass it a constant inline capacity
        because the JIT doesn't have a strategy for selecting a size class based
        on non-constant capacity yet. "INLINE_STORAGE_CAPACITY" is a marker for
        code that makes static assumptions about object size.

        * jit/JITInlineMethods.h:
        (JSC::JIT::emitAllocateBasicJSObject):
        * llint/LLIntData.cpp:
        (JSC::LLInt::Data::performAssertions):
        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm: Ditto for the rest of our many execution engines.

        * runtime/JSObject.h:
        (JSC::JSObject::allocationSize):
        (JSC::JSFinalObject::finishCreation):
        (JSC::JSFinalObject::create): New helper function for computing object
        size dynamically, since we plan to have objects of different sizes.

        (JSC::JSFinalObject::JSFinalObject): Note that our m_inlineStorage used
        to auto-generate an implicit C++ constructor with default null initialization.
        This memory is not observed in its uninitialized state, and our LLInt and
        JIT allocators do not initialize it, so I did not add any explicit code
        to do so, now that the implicit code is gone.

        (JSC::JSObject::offsetOfInlineStorage): Changed the math here to match
        inlineStorageUnsafe(), since we can rely on an explicit data member anymore.

2012-10-11  Geoffrey Garen  <ggaren@apple.com>

        Enable RUNTIME_HEURISTICS all the time, for easier testing
        https://bugs.webkit.org/show_bug.cgi?id=99090

        Reviewed by Filip Pizlo.

        I find myself using this a lot, and there doesn't seem to be an obvious
        reason to compile it out, since it only runs once at startup.

        * runtime/Options.cpp:
        (JSC::overrideOptionWithHeuristic):
        (JSC::Options::initialize):
        * runtime/Options.h: Removed the #ifdef.

2012-10-11  Geoffrey Garen  <ggaren@apple.com>

        Removed ASSERT_CLASS_FITS_IN_CELL
        https://bugs.webkit.org/show_bug.cgi?id=97634

        Reviewed by Mark Hahnenberg.

        Our collector now supports arbitrarily sized objects, so the ASSERT is not needed.

        * API/JSCallbackFunction.cpp:
        * API/JSCallbackObject.cpp:
        * heap/MarkedSpace.h:
        * jsc.cpp:
        * runtime/Arguments.cpp:
        * runtime/ArrayConstructor.cpp:
        * runtime/ArrayPrototype.cpp:
        * runtime/BooleanConstructor.cpp:
        * runtime/BooleanObject.cpp:
        * runtime/BooleanPrototype.cpp:
        * runtime/DateConstructor.cpp:
        * runtime/DatePrototype.cpp:
        * runtime/Error.cpp:
        * runtime/ErrorConstructor.cpp:
        * runtime/ErrorPrototype.cpp:
        * runtime/FunctionConstructor.cpp:
        * runtime/FunctionPrototype.cpp:
        * runtime/InternalFunction.cpp:
        * runtime/JSActivation.cpp:
        * runtime/JSArray.cpp:
        * runtime/JSBoundFunction.cpp:
        * runtime/JSFunction.cpp:
        * runtime/JSGlobalObject.cpp:
        * runtime/JSGlobalThis.cpp:
        * runtime/JSNameScope.cpp:
        * runtime/JSNotAnObject.cpp:
        * runtime/JSONObject.cpp:
        * runtime/JSObject.cpp:
        * runtime/JSPropertyNameIterator.cpp:
        * runtime/JSScope.cpp:
        * runtime/JSWithScope.cpp:
        * runtime/JSWrapperObject.cpp:
        * runtime/MathObject.cpp:
        * runtime/NameConstructor.cpp:
        * runtime/NamePrototype.cpp:
        * runtime/NativeErrorConstructor.cpp:
        * runtime/NativeErrorPrototype.cpp:
        * runtime/NumberConstructor.cpp:
        * runtime/NumberObject.cpp:
        * runtime/NumberPrototype.cpp:
        * runtime/ObjectConstructor.cpp:
        * runtime/ObjectPrototype.cpp:
        * runtime/RegExpConstructor.cpp:
        * runtime/RegExpMatchesArray.cpp:
        * runtime/RegExpObject.cpp:
        * runtime/RegExpPrototype.cpp:
        * runtime/StringConstructor.cpp:
        * runtime/StringObject.cpp:
        * runtime/StringPrototype.cpp:
        * testRegExp.cpp: Removed the ASSERT.

2012-10-11  Filip Pizlo  <fpizlo@apple.com>

        DFG should inline code blocks that use new_array_buffer
        https://bugs.webkit.org/show_bug.cgi?id=98996

        Reviewed by Geoffrey Garen.

        This adds plumbing to drop in constant buffers from the inlinees to the inliner.
        It's smart about not duplicating buffers needlessly but doesn't try to completely
        hash-cons them, either.

        * bytecode/CodeBlock.h:
        (JSC::CodeBlock::numberOfConstantBuffers):
        (JSC::CodeBlock::addConstantBuffer):
        (JSC::CodeBlock::constantBufferAsVector):
        (JSC::CodeBlock::constantBuffer):
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGByteCodeParser.cpp:
        (ConstantBufferKey):
        (JSC::DFG::ConstantBufferKey::ConstantBufferKey):
        (JSC::DFG::ConstantBufferKey::operator==):
        (JSC::DFG::ConstantBufferKey::hash):
        (JSC::DFG::ConstantBufferKey::isHashTableDeletedValue):
        (JSC::DFG::ConstantBufferKey::codeBlock):
        (JSC::DFG::ConstantBufferKey::index):
        (DFG):
        (JSC::DFG::ConstantBufferKeyHash::hash):
        (JSC::DFG::ConstantBufferKeyHash::equal):
        (ConstantBufferKeyHash):
        (WTF):
        (ByteCodeParser):
        (InlineStackEntry):
        (JSC::DFG::ByteCodeParser::parseBlock):
        (JSC::DFG::ByteCodeParser::InlineStackEntry::InlineStackEntry):
        * dfg/DFGCapabilities.h:
        (JSC::DFG::canInlineOpcode):
        * dfg/DFGOperations.cpp:
        * dfg/DFGOperations.h:
        * dfg/DFGSpeculativeJIT.h:
        (JSC::DFG::SpeculativeJIT::callOperation):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):

2012-10-10  Zoltan Horvath  <zoltan@webkit.org>

        Pageload tests should measure memory usage
        https://bugs.webkit.org/show_bug.cgi?id=93958

        Reviewed by Ryosuke Niwa.

        Add JS Heap and Heap memory measurement to PageLoad tests.

        * heap/HeapStatistics.cpp:
        (JSC::HeapStatistics::usedJSHeap): Add new private function to expose the used JS Heap size.
        (JSC):
        * heap/HeapStatistics.h:
        (HeapStatistics): Add new private function to expose the used JS Heap size.

2012-10-10  Balazs Kilvady  <kilvadyb@homejinni.com>

        RegisterFile to JSStack rename fix for a struct member.

        Compilation problem in debug build on MIPS
        https://bugs.webkit.org/show_bug.cgi?id=98808

        Reviewed by Alexey Proskuryakov.

        In ASSERT conditions structure field name "registerFile" was replaced
        with type name "JSStack" and it should be "stack".

        * jit/JITStubs.cpp:
        (JSC::JITThunks::JITThunks): structure member name fix.

2012-10-10  Michael Saboff  <msaboff@apple.com>

        After r130344, OpaqueJSString::string() shouldn't directly return the wrapped String
        https://bugs.webkit.org/show_bug.cgi?id=98801

        Reviewed by Geoffrey Garen.

        Return a copy of the wrapped String so that the wrapped string cannot be turned into 
        an Identifier.

        * API/OpaqueJSString.cpp:
        (OpaqueJSString::string):
        * API/OpaqueJSString.h:
        (OpaqueJSString):

2012-10-10  Peter Gal  <galpeter@inf.u-szeged.hu>

        Add moveDoubleToInts and moveIntsToDouble to MacroAssemblerARM
        https://bugs.webkit.org/show_bug.cgi?id=98855

        Reviewed by Filip Pizlo.

        Implement the missing moveDoubleToInts and moveIntsToDouble
        methods in the MacroAssemblerARM after r130839.

        * assembler/MacroAssemblerARM.h:
        (JSC::MacroAssemblerARM::moveDoubleToInts):
        (MacroAssemblerARM):
        (JSC::MacroAssemblerARM::moveIntsToDouble):

2012-10-09  Filip Pizlo  <fpizlo@apple.com>

        Typed arrays should not be 20x slower in the baseline JIT than in the DFG JIT
        https://bugs.webkit.org/show_bug.cgi?id=98605

        Reviewed by Oliver Hunt and Gavin Barraclough.

        This adds typed array get_by_val/put_by_val patching to the baseline JIT. It's
        a big (~40%) win on benchmarks that have trouble staying in the DFG JIT. Even
        if we fix those benchmarks, this functionality gives us the insurance that we
        typically desire with all speculative optimizations: even if we bail to
        baseline, we're still reasonably performant.

        * CMakeLists.txt:
        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * Target.pri:
        * assembler/MacroAssembler.cpp: Added.
        (JSC):
        * assembler/MacroAssembler.h:
        (MacroAssembler):
        (JSC::MacroAssembler::patchableBranchPtr):
        * assembler/MacroAssemblerARMv7.h:
        (MacroAssemblerARMv7):
        (JSC::MacroAssemblerARMv7::moveDoubleToInts):
        (JSC::MacroAssemblerARMv7::moveIntsToDouble):
        (JSC::MacroAssemblerARMv7::patchableBranchPtr):
        * assembler/MacroAssemblerX86.h:
        (MacroAssemblerX86):
        (JSC::MacroAssemblerX86::moveDoubleToInts):
        (JSC::MacroAssemblerX86::moveIntsToDouble):
        * bytecode/ByValInfo.h:
        (JSC::hasOptimizableIndexingForClassInfo):
        (JSC):
        (JSC::hasOptimizableIndexing):
        (JSC::jitArrayModeForClassInfo):
        (JSC::jitArrayModeForStructure):
        (JSC::ByValInfo::ByValInfo):
        (ByValInfo):
        * dfg/DFGAssemblyHelpers.cpp:
        (DFG):
        * dfg/DFGAssemblyHelpers.h:
        (AssemblyHelpers):
        (JSC::DFG::AssemblyHelpers::boxDouble):
        (JSC::DFG::AssemblyHelpers::unboxDouble):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::compileGetByValOnIntTypedArray):
        (JSC::DFG::SpeculativeJIT::compilePutByValForIntTypedArray):
        * dfg/DFGSpeculativeJIT.h:
        (SpeculativeJIT):
        * jit/JIT.h:
        (JIT):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emit_op_get_by_val):
        (JSC::JIT::emit_op_put_by_val):
        (JSC::JIT::privateCompileGetByVal):
        (JSC::JIT::privateCompilePutByVal):
        (JSC::JIT::emitIntTypedArrayGetByVal):
        (JSC):
        (JSC::JIT::emitFloatTypedArrayGetByVal):
        (JSC::JIT::emitIntTypedArrayPutByVal):
        (JSC::JIT::emitFloatTypedArrayPutByVal):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::emit_op_get_by_val):
        (JSC::JIT::emit_op_put_by_val):
        * jit/JITStubs.cpp:
        (JSC::DEFINE_STUB_FUNCTION):
        * runtime/JSCell.h:
        * runtime/JSGlobalData.h:
        (JSGlobalData):
        (JSC::JSGlobalData::typedArrayDescriptor):
        * runtime/TypedArrayDescriptor.h: Added.
        (JSC):
        (JSC::TypedArrayDescriptor::TypedArrayDescriptor):
        (TypedArrayDescriptor):

2012-10-09  Michael Saboff  <msaboff@apple.com>

        Add tests to testapi for null OpaqueJSStrings
        https://bugs.webkit.org/show_bug.cgi?id=98805

        Reviewed by Geoffrey Garen.

        Added tests that check that OpaqueJSString, which is wrapped via JSStringRef, properly returns
        null strings and that a null string in a JSStringRef will return a NULL JSChar* and 0 length
        via the JSStringGetCharactersPtr() and JSStringGetLength() APIs respectively. Added a check that 
        JSValueMakeFromJSONString() properly handles a null string as well.

        * API/tests/testapi.c:
        (main):

2012-10-09  Jian Li  <jianli@chromium.org>

        Update the CSS property used to support draggable regions.
        https://bugs.webkit.org/show_bug.cgi?id=97156

        Reviewed by Adam Barth.

        The CSS property to support draggable regions, guarded under
        WIDGET_REGION is now disabled from Mac WebKit, in order not to cause
        confusion with DASHBOARD_SUPPORT feature.

        * Configurations/FeatureDefines.xcconfig: Disable WIDGET_REGION feature.

2012-10-09  Filip Pizlo  <fpizlo@apple.com>

        Unreviewed, adding forgotten files.

        * bytecode/ByValInfo.h: Added.
        (JSC):
        (JSC::isOptimizableIndexingType):
        (JSC::jitArrayModeForIndexingType):
        (JSC::ByValInfo::ByValInfo):
        (ByValInfo):
        (JSC::getByValInfoBytecodeIndex):
        * runtime/IndexingType.cpp: Added.
        (JSC):
        (JSC::indexingTypeToString):

2012-10-08  Filip Pizlo  <fpizlo@apple.com>

        JSC should infer when indexed storage is contiguous, and optimize for it
        https://bugs.webkit.org/show_bug.cgi?id=97288

        Reviewed by Mark Hahnenberg.

        This introduces a new kind of indexed property storage called Contiguous,
        which has the following properties:
        
        - No header bits beyond IndexedHeader. This results in a 16 byte reduction
          in memory usage per array versus an ArrayStorage array. It also means
          that the total memory usage for an empty array is now just 3 * 8 on both
          32-bit and 64-bit. Of that, only 8 bytes are array-specific; the rest is
          our standard object header overhead.
        
        - No need for hole checks on store. This results in a ~4% speed-up on
          Kraken and a ~1% speed-up on V8v7.
        
        - publicLength <= vectorLength. This means that doing new Array(blah)
          immediately allocates room for blah elements.
        
        - No sparse map or index bias.
        
        If you ever do things to an array that would require publicLength >
        vectorLength, a sparse map, or index bias, then we switch to ArrayStorage
        mode. This seems to never happen in any benchmark we track, and is unlikely
        to happen very frequently on any website.

        * CMakeLists.txt:
        * GNUmakefile.list.am:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * Target.pri:
        * assembler/AbstractMacroAssembler.h:
        (JSC::AbstractMacroAssembler::JumpList::append):
        * assembler/MacroAssembler.h:
        (MacroAssembler):
        (JSC::MacroAssembler::patchableBranchTest32):
        * bytecode/ByValInfo.h: Added.
        (JSC):
        (JSC::isOptimizableIndexingType):
        (JSC::jitArrayModeForIndexingType):
        (JSC::ByValInfo::ByValInfo):
        (ByValInfo):
        (JSC::getByValInfoBytecodeIndex):
        * bytecode/CodeBlock.h:
        (CodeBlock):
        (JSC::CodeBlock::getByValInfo):
        (JSC::CodeBlock::setNumberOfByValInfos):
        (JSC::CodeBlock::numberOfByValInfos):
        (JSC::CodeBlock::byValInfo):
        * bytecode/SamplingTool.h:
        * dfg/DFGAbstractState.cpp:
        (JSC::DFG::AbstractState::execute):
        * dfg/DFGArrayMode.cpp:
        (JSC::DFG::fromObserved):
        (JSC::DFG::modeAlreadyChecked):
        (JSC::DFG::modeToString):
        * dfg/DFGArrayMode.h:
        (DFG):
        (JSC::DFG::modeUsesButterfly):
        (JSC::DFG::modeIsJSArray):
        (JSC::DFG::isInBoundsAccess):
        (JSC::DFG::mayStoreToTail):
        (JSC::DFG::mayStoreToHole):
        (JSC::DFG::modeIsPolymorphic):
        (JSC::DFG::polymorphicIncludesContiguous):
        (JSC::DFG::polymorphicIncludesArrayStorage):
        (JSC::DFG::canCSEStorage):
        (JSC::DFG::modeSupportsLength):
        (JSC::DFG::benefitsFromStructureCheck):
        (JSC::DFG::isEffectful):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::handleIntrinsic):
        * dfg/DFGCSEPhase.cpp:
        (JSC::DFG::CSEPhase::getArrayLengthElimination):
        (JSC::DFG::CSEPhase::getByValLoadElimination):
        (JSC::DFG::CSEPhase::performNodeCSE):
        * dfg/DFGFixupPhase.cpp:
        (JSC::DFG::FixupPhase::fixupNode):
        (JSC::DFG::FixupPhase::checkArray):
        (JSC::DFG::FixupPhase::blessArrayOperation):
        * dfg/DFGGraph.h:
        (JSC::DFG::Graph::byValIsPure):
        * dfg/DFGOperations.cpp:
        * dfg/DFGOperations.h:
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::tryCacheGetByID):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::checkArray):
        (JSC::DFG::SpeculativeJIT::arrayify):
        (JSC::DFG::SpeculativeJIT::compileGetArrayLength):
        (JSC::DFG::SpeculativeJIT::temporaryRegisterForPutByVal):
        (DFG):
        * dfg/DFGSpeculativeJIT.h:
        (DFG):
        (JSC::DFG::SpeculativeJIT::callOperation):
        (SpeculativeJIT):
        (JSC::DFG::SpeculativeJIT::putByValWillNeedExtraRegister):
        (JSC::DFG::SpeculativeJIT::temporaryRegisterForPutByVal):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compileContiguousGetByVal):
        (DFG):
        (JSC::DFG::SpeculativeJIT::compileArrayStorageGetByVal):
        (JSC::DFG::SpeculativeJIT::compileContiguousPutByVal):
        (JSC::DFG::SpeculativeJIT::compileArrayStoragePutByVal):
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compileContiguousGetByVal):
        (DFG):
        (JSC::DFG::SpeculativeJIT::compileArrayStorageGetByVal):
        (JSC::DFG::SpeculativeJIT::compileContiguousPutByVal):
        (JSC::DFG::SpeculativeJIT::compileArrayStoragePutByVal):
        (JSC::DFG::SpeculativeJIT::compile):
        * interpreter/Interpreter.cpp:
        (SamplingScope):
        (JSC::SamplingScope::SamplingScope):
        (JSC::SamplingScope::~SamplingScope):
        (JSC):
        (JSC::Interpreter::execute):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompileSlowCases):
        (JSC::JIT::privateCompile):
        * jit/JIT.h:
        (JSC::ByValCompilationInfo::ByValCompilationInfo):
        (ByValCompilationInfo):
        (JSC):
        (JIT):
        (JSC::JIT::compileGetByVal):
        (JSC::JIT::compilePutByVal):
        * jit/JITInlineMethods.h:
        (JSC::JIT::emitAllocateJSArray):
        (JSC::JIT::emitArrayProfileStoreToHoleSpecialCase):
        (JSC):
        (JSC::arrayProfileSaw):
        (JSC::JIT::chooseArrayMode):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::emitSlow_op_get_argument_by_val):
        (JSC::JIT::emit_op_new_array):
        (JSC::JIT::emitSlow_op_new_array):
        * jit/JITOpcodes32_64.cpp:
        (JSC::JIT::emitSlow_op_get_argument_by_val):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emit_op_get_by_val):
        (JSC):
        (JSC::JIT::emitContiguousGetByVal):
        (JSC::JIT::emitArrayStorageGetByVal):
        (JSC::JIT::emitSlow_op_get_by_val):
        (JSC::JIT::emit_op_put_by_val):
        (JSC::JIT::emitContiguousPutByVal):
        (JSC::JIT::emitArrayStoragePutByVal):
        (JSC::JIT::emitSlow_op_put_by_val):
        (JSC::JIT::privateCompilePatchGetArrayLength):
        (JSC::JIT::privateCompileGetByVal):
        (JSC::JIT::privateCompilePutByVal):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::emit_op_get_by_val):
        (JSC):
        (JSC::JIT::emitContiguousGetByVal):
        (JSC::JIT::emitArrayStorageGetByVal):
        (JSC::JIT::emitSlow_op_get_by_val):
        (JSC::JIT::emit_op_put_by_val):
        (JSC::JIT::emitContiguousPutByVal):
        (JSC::JIT::emitArrayStoragePutByVal):
        (JSC::JIT::emitSlow_op_put_by_val):
        * jit/JITStubs.cpp:
        (JSC::getByVal):
        (JSC):
        (JSC::DEFINE_STUB_FUNCTION):
        (JSC::putByVal):
        * jit/JITStubs.h:
        * llint/LowLevelInterpreter.asm:
        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm:
        * runtime/ArrayConventions.h:
        (JSC::isDenseEnoughForVector):
        * runtime/ArrayPrototype.cpp:
        (JSC):
        (JSC::shift):
        (JSC::unshift):
        (JSC::arrayProtoFuncPush):
        (JSC::arrayProtoFuncShift):
        (JSC::arrayProtoFuncSplice):
        (JSC::arrayProtoFuncUnShift):
        * runtime/Butterfly.h:
        (Butterfly):
        (JSC::Butterfly::fromPointer):
        (JSC::Butterfly::pointer):
        (JSC::Butterfly::publicLength):
        (JSC::Butterfly::vectorLength):
        (JSC::Butterfly::setPublicLength):
        (JSC::Butterfly::setVectorLength):
        (JSC::Butterfly::contiguous):
        (JSC::Butterfly::fromContiguous):
        * runtime/ButterflyInlineMethods.h:
        (JSC::Butterfly::unshift):
        (JSC::Butterfly::shift):
        * runtime/IndexingHeaderInlineMethods.h:
        (JSC::IndexingHeader::indexingPayloadSizeInBytes):
        * runtime/IndexingType.cpp: Added.
        (JSC):
        (JSC::indexingTypeToString):
        * runtime/IndexingType.h:
        (JSC):
        (JSC::hasContiguous):
        * runtime/JSArray.cpp:
        (JSC::JSArray::setLengthWithArrayStorage):
        (JSC::JSArray::setLength):
        (JSC):
        (JSC::JSArray::pop):
        (JSC::JSArray::push):
        (JSC::JSArray::shiftCountWithArrayStorage):
        (JSC::JSArray::shiftCountWithAnyIndexingType):
        (JSC::JSArray::unshiftCountWithArrayStorage):
        (JSC::JSArray::unshiftCountWithAnyIndexingType):
        (JSC::JSArray::sortNumericVector):
        (JSC::JSArray::sortNumeric):
        (JSC::JSArray::sortCompactedVector):
        (JSC::JSArray::sort):
        (JSC::JSArray::sortVector):
        (JSC::JSArray::fillArgList):
        (JSC::JSArray::copyToArguments):
        (JSC::JSArray::compactForSorting):
        * runtime/JSArray.h:
        (JSC::JSArray::shiftCountForShift):
        (JSC::JSArray::shiftCountForSplice):
        (JSArray):
        (JSC::JSArray::shiftCount):
        (JSC::JSArray::unshiftCountForShift):
        (JSC::JSArray::unshiftCountForSplice):
        (JSC::JSArray::unshiftCount):
        (JSC::JSArray::isLengthWritable):
        (JSC::createContiguousArrayButterfly):
        (JSC):
        (JSC::JSArray::create):
        (JSC::JSArray::tryCreateUninitialized):
        * runtime/JSGlobalObject.cpp:
        (JSC::JSGlobalObject::reset):
        (JSC):
        (JSC::JSGlobalObject::haveABadTime):
        (JSC::JSGlobalObject::visitChildren):
        * runtime/JSGlobalObject.h:
        (JSGlobalObject):
        (JSC::JSGlobalObject::arrayStructureWithArrayStorage):
        (JSC::JSGlobalObject::addressOfArrayStructureWithArrayStorage):
        (JSC::constructEmptyArray):
        * runtime/JSObject.cpp:
        (JSC::JSObject::visitButterfly):
        (JSC::JSObject::getOwnPropertySlotByIndex):
        (JSC::JSObject::putByIndex):
        (JSC::JSObject::enterDictionaryIndexingMode):
        (JSC::JSObject::createInitialContiguous):
        (JSC):
        (JSC::JSObject::createArrayStorage):
        (JSC::JSObject::convertContiguousToArrayStorage):
        (JSC::JSObject::ensureContiguousSlow):
        (JSC::JSObject::ensureArrayStorageSlow):
        (JSC::JSObject::ensureIndexedStorageSlow):
        (JSC::JSObject::ensureArrayStorageExistsAndEnterDictionaryIndexingMode):
        (JSC::JSObject::switchToSlowPutArrayStorage):
        (JSC::JSObject::setPrototype):
        (JSC::JSObject::deletePropertyByIndex):
        (JSC::JSObject::getOwnPropertyNames):
        (JSC::JSObject::defineOwnIndexedProperty):
        (JSC::JSObject::putByIndexBeyondVectorLengthContiguousWithoutAttributes):
        (JSC::JSObject::putByIndexBeyondVectorLength):
        (JSC::JSObject::putDirectIndexBeyondVectorLengthWithArrayStorage):
        (JSC::JSObject::putDirectIndexBeyondVectorLength):
        (JSC::JSObject::getNewVectorLength):
        (JSC::JSObject::countElementsInContiguous):
        (JSC::JSObject::increaseVectorLength):
        (JSC::JSObject::ensureContiguousLengthSlow):
        (JSC::JSObject::getOwnPropertyDescriptor):
        * runtime/JSObject.h:
        (JSC::JSObject::getArrayLength):
        (JSC::JSObject::getVectorLength):
        (JSC::JSObject::canGetIndexQuickly):
        (JSC::JSObject::getIndexQuickly):
        (JSC::JSObject::tryGetIndexQuickly):
        (JSC::JSObject::canSetIndexQuickly):
        (JSC::JSObject::canSetIndexQuicklyForPutDirect):
        (JSC::JSObject::setIndexQuickly):
        (JSC::JSObject::initializeIndex):
        (JSC::JSObject::hasSparseMap):
        (JSC::JSObject::inSparseIndexingMode):
        (JSObject):
        (JSC::JSObject::ensureContiguous):
        (JSC::JSObject::ensureIndexedStorage):
        (JSC::JSObject::ensureContiguousLength):
        (JSC::JSObject::indexingData):
        (JSC::JSObject::relevantLength):
        * runtime/JSValue.cpp:
        (JSC::JSValue::description):
        * runtime/Options.cpp:
        (JSC::Options::initialize):
        * runtime/Structure.cpp:
        (JSC::Structure::needsSlowPutIndexing):
        (JSC):
        (JSC::Structure::suggestedArrayStorageTransition):
        * runtime/Structure.h:
        (Structure):
        * runtime/StructureTransitionTable.h:
        (JSC::newIndexingType):

2012-10-09  Michael Saboff  <msaboff@apple.com>

        After r130344, OpaqueJSString::identifier() adds wrapped String to identifier table
        https://bugs.webkit.org/show_bug.cgi?id=98693
        REGRESSION (r130344): Install failed in Install Environment
        <rdar://problem/12450118>

        Reviewed by Mark Rowe.

        Use Identifier(LChar*, length) or Identifier(UChar*, length) constructors so that we don't
        add the String instance in the OpaqueJSString to any identifier tables.

        * API/OpaqueJSString.cpp:
        (OpaqueJSString::identifier):

2012-10-08  Mark Lam  <mark.lam@apple.com>

        Renamed RegisterFile to JSStack, and removed prototype of the
        previously deleted Interpreter::privateExecute().
        https://bugs.webkit.org/show_bug.cgi?id=98717.

        Reviewed by Filip Pizlo.

        * CMakeLists.txt:
        * GNUmakefile.list.am:
        * JavaScriptCore.order:
        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * Target.pri:
        * bytecode/BytecodeConventions.h:
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::nameForRegister):
        * bytecode/CodeBlock.h:
        (CodeBlock):
        * bytecode/ValueRecovery.h:
        (JSC::ValueRecovery::alreadyInJSStack):
        (JSC::ValueRecovery::alreadyInJSStackAsUnboxedInt32):
        (JSC::ValueRecovery::alreadyInJSStackAsUnboxedCell):
        (JSC::ValueRecovery::alreadyInJSStackAsUnboxedBoolean):
        (JSC::ValueRecovery::alreadyInJSStackAsUnboxedDouble):
        (JSC::ValueRecovery::displacedInJSStack):
        (JSC::ValueRecovery::isAlreadyInJSStack):
        (JSC::ValueRecovery::virtualRegister):
        (JSC::ValueRecovery::dump):
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::BytecodeGenerator::resolveCallee):
        (JSC::BytecodeGenerator::emitCall):
        (JSC::BytecodeGenerator::emitConstruct):
        * bytecompiler/BytecodeGenerator.h:
        (JSC::BytecodeGenerator::registerFor):
        * dfg/DFGAbstractState.h:
        (AbstractState):
        * dfg/DFGAssemblyHelpers.h:
        (JSC::DFG::AssemblyHelpers::emitGetFromCallFrameHeaderPtr):
        (JSC::DFG::AssemblyHelpers::emitPutToCallFrameHeader):
        (JSC::DFG::AssemblyHelpers::emitPutImmediateToCallFrameHeader):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::getDirect):
        (JSC::DFG::ByteCodeParser::findArgumentPositionForLocal):
        (JSC::DFG::ByteCodeParser::addCall):
        (JSC::DFG::ByteCodeParser::InlineStackEntry::remapOperand):
        (JSC::DFG::ByteCodeParser::handleInlining):
        (JSC::DFG::ByteCodeParser::parseBlock):
        (JSC::DFG::ByteCodeParser::InlineStackEntry::InlineStackEntry):
        * dfg/DFGGenerationInfo.h:
        (GenerationInfo):
        (JSC::DFG::GenerationInfo::needsSpill):
        * dfg/DFGGraph.h:
        * dfg/DFGJITCompiler.cpp:
        (JSC::DFG::JITCompiler::compileEntry):
        (JSC::DFG::JITCompiler::compileFunction):
        * dfg/DFGJITCompiler.h:
        (JSC::DFG::JITCompiler::beginCall):
        * dfg/DFGOSREntry.cpp:
        (JSC::DFG::prepareOSREntry):
        * dfg/DFGOSRExitCompiler32_64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGOSRExitCompiler64.cpp:
        (JSC::DFG::OSRExitCompiler::compileExit):
        * dfg/DFGRepatch.cpp:
        (JSC::DFG::tryBuildGetByIDList):
        * dfg/DFGSpeculativeJIT.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        (JSC::DFG::SpeculativeJIT::checkArgumentTypes):
        (JSC::DFG::SpeculativeJIT::computeValueRecoveryFor):
        * dfg/DFGSpeculativeJIT.h:
        (SpeculativeJIT):
        (JSC::DFG::SpeculativeJIT::spill):
        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::emitCall):
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::fillInteger):
        (JSC::DFG::SpeculativeJIT::emitCall):
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGThunks.cpp:
        (JSC::DFG::throwExceptionFromCallSlowPathGenerator):
        (JSC::DFG::slowPathFor):
        (JSC::DFG::virtualForThunkGenerator):
        * dfg/DFGValueSource.cpp:
        (JSC::DFG::ValueSource::dump):
        * dfg/DFGValueSource.h:
        (JSC::DFG::dataFormatToValueSourceKind):
        (JSC::DFG::valueSourceKindToDataFormat):
        (JSC::DFG::isInJSStack):
        (JSC::DFG::ValueSource::forSpeculation):
        (JSC::DFG::ValueSource::isInJSStack):
        (JSC::DFG::ValueSource::valueRecovery):
        * dfg/DFGVariableEventStream.cpp:
        (JSC::DFG::VariableEventStream::reconstruct):
        * heap/Heap.cpp:
        (JSC::Heap::stack):
        (JSC::Heap::getConservativeRegisterRoots):
        (JSC::Heap::markRoots):
        * heap/Heap.h:
        (JSC):
        (Heap):
        * interpreter/CallFrame.cpp:
        (JSC::CallFrame::stack):
        * interpreter/CallFrame.h:
        (JSC::ExecState::calleeAsValue):
        (JSC::ExecState::callee):
        (JSC::ExecState::codeBlock):
        (JSC::ExecState::scope):
        (JSC::ExecState::callerFrame):
        (JSC::ExecState::returnPC):
        (JSC::ExecState::hasReturnPC):
        (JSC::ExecState::clearReturnPC):
        (JSC::ExecState::bytecodeOffsetForNonDFGCode):
        (JSC::ExecState::setBytecodeOffsetForNonDFGCode):
        (JSC::ExecState::inlineCallFrame):
        (JSC::ExecState::codeOriginIndexForDFG):
        (JSC::ExecState::currentVPC):
        (JSC::ExecState::setCurrentVPC):
        (JSC::ExecState::setCallerFrame):
        (JSC::ExecState::setScope):
        (JSC::ExecState::init):
        (JSC::ExecState::argumentCountIncludingThis):
        (JSC::ExecState::offsetFor):
        (JSC::ExecState::setArgumentCountIncludingThis):
        (JSC::ExecState::setCallee):
        (JSC::ExecState::setCodeBlock):
        (JSC::ExecState::setReturnPC):
        (JSC::ExecState::setInlineCallFrame):
        (ExecState):
        * interpreter/Interpreter.cpp:
        (JSC::Interpreter::slideRegisterWindowForCall):
        (JSC::eval):
        (JSC::loadVarargs):
        (JSC::Interpreter::dumpRegisters):
        (JSC::Interpreter::throwException):
        (JSC::Interpreter::execute):
        (JSC::Interpreter::executeCall):
        (JSC::Interpreter::executeConstruct):
        (JSC::Interpreter::prepareForRepeatCall):
        (JSC::Interpreter::endRepeatCall):
        * interpreter/Interpreter.h:
        (JSC::Interpreter::stack):
        (Interpreter):
        (JSC::Interpreter::execute):
        (JSC):
        * interpreter/JSStack.cpp: Copied from Source/JavaScriptCore/interpreter/RegisterFile.cpp.
        (JSC::stackStatisticsMutex):
        (JSC::JSStack::~JSStack):
        (JSC::JSStack::growSlowCase):
        (JSC::JSStack::gatherConservativeRoots):
        (JSC::JSStack::releaseExcessCapacity):
        (JSC::JSStack::initializeThreading):
        (JSC::JSStack::committedByteCount):
        (JSC::JSStack::addToCommittedByteCount):
        * interpreter/JSStack.h: Copied from Source/JavaScriptCore/interpreter/RegisterFile.h.
        (JSStack):
        (JSC::JSStack::JSStack):
        (JSC::JSStack::shrink):
        (JSC::JSStack::grow):
        * interpreter/RegisterFile.cpp: Removed.
        * interpreter/RegisterFile.h: Removed.
        * interpreter/VMInspector.cpp:
        (JSC::VMInspector::dumpFrame):
        * jit/JIT.cpp:
        (JSC::JIT::JIT):
        (JSC::JIT::privateCompile):
        * jit/JIT.h:
        (JSC):
        (JIT):
        * jit/JITCall.cpp:
        (JSC::JIT::compileLoadVarargs):
        (JSC::JIT::compileCallEval):
        (JSC::JIT::compileCallEvalSlowCase):
        (JSC::JIT::compileOpCall):
        * jit/JITCall32_64.cpp:
        (JSC::JIT::emit_op_ret):
        (JSC::JIT::emit_op_ret_object_or_this):
        (JSC::JIT::compileLoadVarargs):
        (JSC::JIT::compileCallEval):
        (JSC::JIT::compileCallEvalSlowCase):
        (JSC::JIT::compileOpCall):
        * jit/JITCode.h:
        (JSC):
        (JSC::JITCode::execute):
        * jit/JITInlineMethods.h:
        (JSC::JIT::emitPutToCallFrameHeader):
        (JSC::JIT::emitPutCellToCallFrameHeader):
        (JSC::JIT::emitPutIntToCallFrameHeader):
        (JSC::JIT::emitPutImmediateToCallFrameHeader):
        (JSC::JIT::emitGetFromCallFrameHeaderPtr):
        (JSC::JIT::emitGetFromCallFrameHeader32):
        (JSC::JIT::updateTopCallFrame):
        (JSC::JIT::unmap):
        * jit/JITOpcodes.cpp:
        (JSC::JIT::privateCompileCTIMachineTrampolines):
        (JSC::JIT::privateCompileCTINativeCall):
        (JSC::JIT::emit_op_end):
        (JSC::JIT::emit_op_ret):
        (JSC::JIT::emit_op_ret_object_or_this):
        (JSC::JIT::emit_op_create_this):
        (JSC::JIT::emit_op_get_arguments_length):
        (JSC::JIT::emit_op_get_argument_by_val):
        (JSC::JIT::emit_op_resolve_global_dynamic):
        * jit/JITOpcodes32_64.cpp:
        (JSC::JIT::privateCompileCTIMachineTrampolines):
        (JSC::JIT::privateCompileCTINativeCall):
        (JSC::JIT::emit_op_end):
        (JSC::JIT::emit_op_create_this):
        (JSC::JIT::emit_op_get_arguments_length):
        (JSC::JIT::emit_op_get_argument_by_val):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::emit_op_get_scoped_var):
        (JSC::JIT::emit_op_put_scoped_var):
        * jit/JITPropertyAccess32_64.cpp:
        (JSC::JIT::emit_op_get_scoped_var):
        (JSC::JIT::emit_op_put_scoped_var):
        * jit/JITStubs.cpp:
        (JSC::ctiTrampoline):
        (JSC::JITThunks::JITThunks):
        (JSC):
        (JSC::DEFINE_STUB_FUNCTION):
        * jit/JITStubs.h:
        (JSC):
        (JITStackFrame):
        * jit/JSInterfaceJIT.h:
        * jit/SpecializedThunkJIT.h:
        (JSC::SpecializedThunkJIT::SpecializedThunkJIT):
        (JSC::SpecializedThunkJIT::returnJSValue):
        (JSC::SpecializedThunkJIT::returnDouble):
        (JSC::SpecializedThunkJIT::returnInt32):
        (JSC::SpecializedThunkJIT::returnJSCell):
        * llint/LLIntData.cpp:
        (JSC::LLInt::Data::performAssertions):
        * llint/LLIntOffsetsExtractor.cpp:
        * llint/LLIntSlowPaths.cpp:
        (JSC::LLInt::LLINT_SLOW_PATH_DECL):
        (JSC::LLInt::genericCall):
        * llint/LLIntSlowPaths.h:
        (LLInt):
        * llint/LowLevelInterpreter.asm:
        * runtime/Arguments.cpp:
        (JSC::Arguments::tearOffForInlineCallFrame):
        * runtime/CommonSlowPaths.h:
        (JSC::CommonSlowPaths::arityCheckFor):
        * runtime/InitializeThreading.cpp:
        (JSC::initializeThreadingOnce):
        * runtime/JSActivation.cpp:
        (JSC::JSActivation::visitChildren):
        * runtime/JSGlobalObject.cpp:
        (JSC::JSGlobalObject::globalExec):
        * runtime/JSGlobalObject.h:
        (JSC):
        (JSGlobalObject):
        * runtime/JSLock.cpp:
        (JSC):
        * runtime/JSVariableObject.h:
        (JSVariableObject):
        * runtime/MemoryStatistics.cpp:
        (JSC::globalMemoryStatistics):

2012-10-08  Kiran Muppala  <cmuppala@apple.com>

        Throttle DOM timers on hidden pages.
        https://bugs.webkit.org/show_bug.cgi?id=98474

        Reviewed by Maciej Stachowiak.

        Add HIDDEN_PAGE_DOM_TIMER_THROTTLING feature define.

        * Configurations/FeatureDefines.xcconfig:

2012-10-08  Michael Saboff  <msaboff@apple.com>

        After r130344, OpaqueJSString() creates an empty string which should be a null string
        https://bugs.webkit.org/show_bug.cgi?id=98417

        Reviewed by Sam Weinig.

        Changed create() of a null string to return 0. This is the same behavior as before r130344.

        * API/OpaqueJSString.cpp:
        (OpaqueJSString::create):

2012-10-07  Caio Marcelo de Oliveira Filho  <caio.oliveira@openbossa.org>

        Rename first/second to key/value in HashMap iterators
        https://bugs.webkit.org/show_bug.cgi?id=82784

        Reviewed by Eric Seidel.

        * API/JSCallbackObject.h:
        (JSC::JSCallbackObjectData::JSPrivatePropertyMap::getPrivateProperty):
        (JSC::JSCallbackObjectData::JSPrivatePropertyMap::setPrivateProperty):
        (JSC::JSCallbackObjectData::JSPrivatePropertyMap::visitChildren):
        * API/JSCallbackObjectFunctions.h:
        (JSC::::getOwnNonIndexPropertyNames):
        * API/JSClassRef.cpp:
        (OpaqueJSClass::~OpaqueJSClass):
        (OpaqueJSClassContextData::OpaqueJSClassContextData):
        (OpaqueJSClass::contextData):
        * bytecode/CodeBlock.cpp:
        (JSC::CodeBlock::dump):
        (JSC::EvalCodeCache::visitAggregate):
        (JSC::CodeBlock::nameForRegister):
        * bytecode/JumpTable.h:
        (JSC::StringJumpTable::offsetForValue):
        (JSC::StringJumpTable::ctiForValue):
        * bytecode/LazyOperandValueProfile.cpp:
        (JSC::LazyOperandValueProfileParser::getIfPresent):
        * bytecode/SamplingTool.cpp:
        (JSC::SamplingTool::dump):
        * bytecompiler/BytecodeGenerator.cpp:
        (JSC::BytecodeGenerator::addVar):
        (JSC::BytecodeGenerator::addGlobalVar):
        (JSC::BytecodeGenerator::addConstant):
        (JSC::BytecodeGenerator::addConstantValue):
        (JSC::BytecodeGenerator::emitLoad):
        (JSC::BytecodeGenerator::addStringConstant):
        (JSC::BytecodeGenerator::emitLazyNewFunction):
        * bytecompiler/NodesCodegen.cpp:
        (JSC::PropertyListNode::emitBytecode):
        * debugger/Debugger.cpp:
        * dfg/DFGArgumentsSimplificationPhase.cpp:
        (JSC::DFG::ArgumentsSimplificationPhase::run):
        (JSC::DFG::ArgumentsSimplificationPhase::observeBadArgumentsUse):
        (JSC::DFG::ArgumentsSimplificationPhase::observeProperArgumentsUse):
        (JSC::DFG::ArgumentsSimplificationPhase::isOKToOptimize):
        (JSC::DFG::ArgumentsSimplificationPhase::removeArgumentsReferencingPhantomChild):
        * dfg/DFGAssemblyHelpers.cpp:
        (JSC::DFG::AssemblyHelpers::decodedCodeMapFor):
        * dfg/DFGByteCodeCache.h:
        (JSC::DFG::ByteCodeCache::~ByteCodeCache):
        (JSC::DFG::ByteCodeCache::get):
        * dfg/DFGByteCodeParser.cpp:
        (JSC::DFG::ByteCodeParser::cellConstant):
        (JSC::DFG::ByteCodeParser::InlineStackEntry::InlineStackEntry):
        * dfg/DFGStructureCheckHoistingPhase.cpp:
        (JSC::DFG::StructureCheckHoistingPhase::run):
        (JSC::DFG::StructureCheckHoistingPhase::noticeStructureCheck):
        (JSC::DFG::StructureCheckHoistingPhase::noticeClobber):
        * heap/Heap.cpp:
        (JSC::Heap::markProtectedObjects):
        * heap/Heap.h:
        (JSC::Heap::forEachProtectedCell):
        * heap/JITStubRoutineSet.cpp:
        (JSC::JITStubRoutineSet::markSlow):
        (JSC::JITStubRoutineSet::deleteUnmarkedJettisonedStubRoutines):
        * heap/SlotVisitor.cpp:
        (JSC::SlotVisitor::internalAppend):
        * heap/Weak.h:
        (JSC::weakRemove):
        * jit/JIT.cpp:
        (JSC::JIT::privateCompile):
        * jit/JITStubs.cpp:
        (JSC::JITThunks::ctiStub):
        * parser/Parser.cpp:
        (JSC::::parseStrictObjectLiteral):
        * profiler/Profile.cpp:
        (JSC::functionNameCountPairComparator):
        (JSC::Profile::debugPrintDataSampleStyle):
        * runtime/Identifier.cpp:
        (JSC::Identifier::add):
        * runtime/JSActivation.cpp:
        (JSC::JSActivation::getOwnNonIndexPropertyNames):
        (JSC::JSActivation::symbolTablePutWithAttributes):
        * runtime/JSArray.cpp:
        (JSC::JSArray::setLength):
        * runtime/JSObject.cpp:
        (JSC::JSObject::getOwnPropertySlotByIndex):
        (JSC::JSObject::enterDictionaryIndexingModeWhenArrayStorageAlreadyExists):
        (JSC::JSObject::deletePropertyByIndex):
        (JSC::JSObject::getOwnPropertyNames):
        (JSC::JSObject::defineOwnIndexedProperty):
        (JSC::JSObject::attemptToInterceptPutByIndexOnHoleForPrototype):
        (JSC::JSObject::putByIndexBeyondVectorLengthWithArrayStorage):
        (JSC::JSObject::putDirectIndexBeyondVectorLengthWithArrayStorage):
        (JSC::JSObject::getOwnPropertyDescriptor):
        * runtime/JSSymbolTableObject.cpp:
        (JSC::JSSymbolTableObject::getOwnNonIndexPropertyNames):
        * runtime/JSSymbolTableObject.h:
        (JSC::symbolTableGet):
        (JSC::symbolTablePut):
        (JSC::symbolTablePutWithAttributes):
        * runtime/RegExpCache.cpp:
        (JSC::RegExpCache::invalidateCode):
        * runtime/SparseArrayValueMap.cpp:
        (JSC::SparseArrayValueMap::putEntry):
        (JSC::SparseArrayValueMap::putDirect):
        (JSC::SparseArrayValueMap::visitChildren):
        * runtime/WeakGCMap.h:
        (JSC::WeakGCMap::clear):
        (JSC::WeakGCMap::set):
        * tools/ProfileTreeNode.h:
        (JSC::ProfileTreeNode::sampleChild):
        (JSC::ProfileTreeNode::childCount):
        (JSC::ProfileTreeNode::dumpInternal):
        (JSC::ProfileTreeNode::compareEntries):

2012-10-05  Mark Hahnenberg  <mhahnenberg@apple.com>

        JSC should have a way to gather and log Heap memory use and pause times
        https://bugs.webkit.org/show_bug.cgi?id=98431

        Reviewed by Geoffrey Garen.

        In order to improve our infrastructure for benchmark-driven development, we should 
        have a centralized method of gathering and logging various statistics about the state 
        of the JS heap. This would allow us to create and to use other tools to analyze the 
        output of the VM after running various workloads.

        The first two statistics that might be interesting is memory use by JSC and GC pause 
        times. We can control whether this recording happens through the use of the Options 
        class, allowing us to either use environment variables or command line flags.

        * JavaScriptCore.xcodeproj/project.pbxproj:
        * heap/Heap.cpp:
        (JSC::Heap::collect): If we finish a collection and are still over our set GC heap size, 
        we end the program immediately and report an error. Also added recording of pause times.
        * heap/Heap.h:
        (Heap):
        (JSC::Heap::shouldCollect): When we set a specific GC heap size through Options, we 
        ignore all other heuristics on when we should collect and instead only ask if we're 
        greater than the amount specified in the Option value. This allows us to view time/memory 
        tradeoffs more clearly.
        * heap/HeapStatistics.cpp: Added.
        (JSC):
        (JSC::HeapStatistics::initialize):
        (JSC::HeapStatistics::recordGCPauseTime):
        (JSC::HeapStatistics::logStatistics):
        (JSC::HeapStatistics::exitWithFailure):
        (JSC::HeapStatistics::reportSuccess):
        (JSC::HeapStatistics::parseMemoryAmount):
        (StorageStatistics):
        (JSC::StorageStatistics::StorageStatistics):
        (JSC::StorageStatistics::operator()):
        (JSC::StorageStatistics::objectWithOutOfLineStorageCount):
        (JSC::StorageStatistics::objectCount):
        (JSC::StorageStatistics::storageSize):
        (JSC::StorageStatistics::storageCapacity):
        (JSC::HeapStatistics::showObjectStatistics): Moved the old showHeapStatistics (renamed to showObjectStatistics) 
        to try to start collecting our various memory statistics gathering/reporting mechanisms scattered throughout the 
        codebase into one place.
        * heap/HeapStatistics.h: Added.
        (JSC):
        (HeapStatistics):
        * jsc.cpp:
        (main):
        * runtime/InitializeThreading.cpp:
        (JSC::initializeThreadingOnce): We need to initialize our data structures for recording 
        statistics if necessary.
        * runtime/Options.cpp: Add new Options for the various types of statistics we'll be gathering.
        (JSC::parse):
        (JSC):
        (JSC::Options::initialize): Initialize the various new options using environment variables.
        (JSC::Options::dumpOption):
        * runtime/Options.h:
        (JSC):

2012-10-04  Rik Cabanier  <cabanier@adobe.com>

        Turn Compositing on by default in WebKit build
        https://bugs.webkit.org/show_bug.cgi?id=98315

        Reviewed by Simon Fraser.

        enable -webkit-blend-mode on trunk.

        * Configurations/FeatureDefines.xcconfig:

2012-10-04  Michael Saboff  <msaboff@apple.com>

        Crash in Safari at com.apple.JavaScriptCore: WTF::StringImpl::is8Bit const + 12
        https://bugs.webkit.org/show_bug.cgi?id=98433

        Reviewed by Jessie Berlin.

        The problem is due to a String with a null StringImpl (i.e. a null string).
        Added a length check before the is8Bit() check since length() checks for a null StringImpl.  Changed the
        characters16() call to characters() since it can handle a null StringImpl as well.

        * API/JSValueRef.cpp:
        (JSValueMakeFromJSONString):

2012-10-04  Benjamin Poulain  <bpoulain@apple.com>

        Use copyLCharsFromUCharSource() for IdentifierLCharFromUCharTranslator translation
        https://bugs.webkit.org/show_bug.cgi?id=98335

        Reviewed by Michael Saboff.

        Michael Saboff added an optimized version of UChar->LChar conversion in r125846.
        Use this function in JSC::Identifier.

        * runtime/Identifier.cpp:
        (JSC::IdentifierLCharFromUCharTranslator::translate):

2012-10-04  Michael Saboff  <msaboff@apple.com>

        After r130344, OpaqueJSString() creates a empty string which should be a null string
        https://bugs.webkit.org/show_bug.cgi?id=98417

        Reviewed by Alexey Proskuryakov.

        Removed the setting of enclosed string to an empty string from default constructor.
        Before changeset r130344, the semantic was the default constructor produced a null
        string.

        * API/OpaqueJSString.h:
        (OpaqueJSString::OpaqueJSString):

2012-10-04  Csaba Osztrogonác  <ossy@webkit.org>

        [Qt] Add missing LLInt dependencies to the build system
        https://bugs.webkit.org/show_bug.cgi?id=98394

        Reviewed by Geoffrey Garen.

        * DerivedSources.pri:
        * LLIntOffsetsExtractor.pro:

2012-10-03  Geoffrey Garen  <ggaren@apple.com>

        Next step toward fixing Windows: add new symbol.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:

2012-10-03  Geoffrey Garen  <ggaren@apple.com>

        First step toward fixing Windows: remove old symbol.

        * JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.def:

2012-10-03  Geoffrey Garen  <ggaren@apple.com>

        Removed the assumption that "final" objects have a fixed number of inline slots
        https://bugs.webkit.org/show_bug.cgi?id=98332

        Reviewed by Filip Pizlo.

        This is a step toward object size inference.

        I replaced the inline storage capacity constant with a data member per
        structure, set the the maximum supported value for the constant to 100,
        then fixed what broke. (Note that even though this patch increases the
        theoretical maximum inline capacity, it doesn't change any actual inline
        capacity.)

        * dfg/DFGSpeculativeJIT32_64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * dfg/DFGSpeculativeJIT64.cpp:
        (JSC::DFG::SpeculativeJIT::compile):
        * jit/JITPropertyAccess.cpp:
        (JSC::JIT::compileGetDirectOffset): These functions just get a rename:
        the constant they need is the first out of line offset along the offset
        number line, which is not necessarily the same thing (and is, in this
        patch, never the same thing) as the inline capacity of any given object.

        (JSC::JIT::emit_op_get_by_pname):
        * jit/JITPropertyAccess32_64.cpp: This function changes functionality,
        since it needs to convert from the abstract offset number line to an
        actual offset in memory, and it can't assume that inline and out-of-line
        offsets are contiguous on the number line.

        (JSC::JIT::compileGetDirectOffset): Updated for rename.

        (JSC::JIT::emit_op_get_by_pname): Same as emit_op_get_by_pname above.

        * llint/LowLevelInterpreter.asm: Updated to mirror changes in PropertyOffset.h,
        since we duplicate values from there.

        * llint/LowLevelInterpreter32_64.asm:
        * llint/LowLevelInterpreter64.asm: Just like the JIT, most things are just
        renames, and get_by_pname changes to do more math. I also standardized
        offset calculations to use a hard-coded "-2", to match the JIT. This
        isn't really better, but it makes global search and replace easier,
        should we choose to refactor this code not to hard-code constants.

        I also renamed loadPropertyAtVariableOffsetKnownNotFinal to
        loadPropertyAtVariableOffsetKnownNotInline in order to sever the assumption
        that inline capacity is tied to object type, and I changed the 64bit LLInt
        to use this -- not using this previously seems to have been an oversight.

        * runtime/JSObject.cpp:
        (JSC::JSObject::visitChildren):
        (JSC::JSFinalObject::visitChildren):
        * runtime/JSObject.h:
        (JSC::JSObject::offsetForLocation):
        (JSNonFinalObject):
        (JSC::JSFinalObject::createStructure):
        (JSFinalObject):
        (JSC::JSFinalObject::finishCreation): Updated for above changes.

        * runtime/JSPropertyNameIterator.h:
        (JSPropertyNameIterator):
        (JSC::JSPropertyNameIterator::finishCreation): Store the inline capacity
        of our object, since it's not a constant.

        (JSC::JSPropertyNameIterator::getOffset): Removed. This function was
        wrong. Luckily, it was also unused, since the C++ interpreter is gone.

        * runtime/PropertyMapHashTable.h:
        (PropertyTable): Use a helper function instead of hard-coding assumptions
        about object types.

        (JSC::PropertyTable::nextOffset):
        * runtime/PropertyOffset.h:
        (JSC):
        (JSC::checkOffset):
        (JSC::validateOffset):
        (JSC::isInlineOffset):
        (JSC::numberOfSlotsForLastOffset):
        (JSC::propertyOffsetFor): Refactored these functions to take inline capacity
        as an argument, since it's not fixed at compile time anymore.

        * runtime/Structure.cpp:
        (JSC::Structure::Structure):
        (JSC::Structure::flattenDictionaryStructure):
        (JSC::Structure::putSpecificValue):
        * runtime/Structure.h:
        (Structure):
        (JSC::Structure::outOfLineCapacity):
        (JSC::Structure::hasInlineStorage):
        (JSC::Structure::inlineCapacity):
        (JSC::Structure::inlineSize):
        (JSC::Structure::firstValidOffset):
        (JSC::Structure::lastValidOffset):
        (JSC::Structure::create): Removed some hard-coded assumptions about inline
        capacity and object type, and replaced with more liberal use of helper functions.

2012-10-03  Michael Saboff  <msaboff@apple.com>

        OpaqueJSString doesn't optimally handle 8 bit strings
        https://bugs.webkit.org/show_bug.cgi?id=98300

        Reviewed by Geoffrey Garen.

        Change OpaqueJSString to store and manage a String instead of a UChar buffer.
        The member string is a copy of any string used during creation.

        * API/OpaqueJSString.cpp:
        (OpaqueJSString::create):
        (OpaqueJSString::identifier):
        * API/OpaqueJSString.h:
        (OpaqueJSString::characters):
        (OpaqueJSString::length):
        (OpaqueJSString::string):
        (OpaqueJSString::OpaqueJSString):
        (OpaqueJSString):

2012-10-03  Filip Pizlo  <fpizlo@apple.com>

        Array.splice should be fast when it is used to remove elements other than the very first
        https://bugs.webkit.org/show_bug.cgi?id=98236

        Reviewed by Michael Saboff.

        Applied the same technique that was used to optimize the unshift case of splice in
        http://trac.webkit.org/changeset/129676.  This is a >20x speed-up on programs that
        use splice for element removal.

        * runtime/ArrayPrototype.cpp:
        (JSC::shift):
        * runtime/JSArray.cpp:
        (JSC::JSArray::shiftCount):
        * runtime/JSArray.h:
        (JSArray):

2012-09-16  Mark Hahnenberg  <mhahnenberg@apple.com>

        Delayed structure sweep can leak structures without bound
        https://bugs.webkit.org/show_bug.cgi?id=96546

        Reviewed by Geoffrey Garen.

        This patch gets rid of the separate Structure allocator in the MarkedSpace and adds two new destructor-only
        allocators. We now have separate allocators for our three types of objects: those objects with no destructors,
        those objects with destructors and with immortal structures, and those objects with destructors that don't have 
        immortal structures. All of the objects of the third type (destructors without immortal structures) now 
        inherit from a new class named JSDestructibleObject (which in turn is a subclass of JSNonFinalObject), which stores 
        the ClassInfo for these classes at a fixed offset for safe retrieval during sweeping/destruction.

        * API/JSCallbackConstructor.cpp: Use JSDestructibleObject for JSCallbackConstructor.
        (JSC):
        (JSC::JSCallbackConstructor::JSCallbackConstructor):
        * API/JSCallbackConstructor.h:
        (JSCallbackConstructor):
        * API/JSCallbackObject.cpp: Inherit from JSDestructibleObject for normal JSCallbackObjects and use a finalizer for 
        JSCallbackObject<JSGlobalObject>, since JSGlobalObject also uses a finalizer.
        (JSC):
        (JSC::::create): We need to move the create function for JSCallbackObject<JSGlobalObject> out of line so we can add 
        the finalizer for it. We don't want to add the finalizer is something like finishCreation in case somebody decides 
        to subclass this. We use this same technique for many other subclasses of JSGlobalObject.
        (JSC::::createStructure):
        * API/JSCallbackObject.h:
        (JSCallbackObject):
        (JSC):
        * API/JSClassRef.cpp: Change all the JSCallbackObject<JSNonFinalObject> to use JSDestructibleObject instead.
        (OpaqueJSClass::prototype):
        * API/JSObjectRef.cpp: Ditto.
        (JSObjectMake):
        (JSObjectGetPrivate):
        (JSObjectSetPrivate):
        (JSObjectGetPrivateProperty):
        (JSObjectSetPrivateProperty):
        (JSObjectDeletePrivateProperty):
        * API/JSValueRef.cpp: Ditto.
        (JSValueIsObjectOfClass):
        * API/JSWeakObjectMapRefPrivate.cpp: Ditto.
        * JSCTypedArrayStubs.h:
        (JSC):
        * JavaScriptCore.xcodeproj/project.pbxproj:
        * dfg/DFGSpeculativeJIT.h: Use the proper allocator type when doing inline allocation in the DFG.
        (JSC::DFG::SpeculativeJIT::emitAllocateBasicJSObject):
        (JSC::DFG::SpeculativeJIT::emitAllocateJSFinalObject):
        * heap/Heap.cpp:
        (JSC):
        * heap/Heap.h: Add accessors for the various types of allocators now. Also remove the isSafeToSweepStructures function 
        since it's always safe to sweep Structures now.
        (JSC::Heap::allocatorForObjectWithNormalDestructor): 
        (JSC::Heap::allocatorForObjectWithImmortalStructureDestructor):
        (Heap):
        (JSC::Heap::allocateWithNormalDestructor):
        (JSC):
        (JSC::Heap::allocateWithImmortalStructureDestructor):
        * heap/IncrementalSweeper.cpp: Remove all the logic to detect when it's safe to sweep Structures from the 
        IncrementalSweeper since it's always safe to sweep Structures now.
        (JSC::IncrementalSweeper::IncrementalSweeper):
        (JSC::IncrementalSweeper::sweepNextBlock):
        (JSC::IncrementalSweeper::startSweeping):
        (JSC::IncrementalSweeper::willFinishSweeping):
        (JSC):
        * heap/IncrementalSweeper.h:
        (IncrementalSweeper):
        * heap/MarkedAllocator.cpp: Remove the logic that was preventing us from sweeping Structures if it wasn't safe. Add 
        tracking of the specific destructor type of allocator. 
        (JSC::MarkedAllocator::tryAllocateHelper):
        (JSC::MarkedAllocator::allocateBlock):
        * heap/MarkedAllocator.h:
        (JSC::MarkedAllocator::destructorType):
        (MarkedAllocator):
        (JSC::MarkedAllocator::MarkedAllocator):
        (JSC::MarkedAllocator::init):
        * heap/MarkedBlock.cpp: Add all the destructor type stuff to MarkedBlocks so that we do the right thing when sweeping. 
        We also use the stored destructor type to determine the right thing to do in all JSCell::classInfo() calls.
        (JSC::MarkedBlock::create):
        (JSC::MarkedBlock::MarkedBlock):
        (JSC):
        (JSC::MarkedBlock::specializedSweep):
        (JSC::MarkedBlock::sweep):
        (JSC::MarkedBlock::sweepHelper):
        * heap/MarkedBlock.h:
        (JSC):
        (JSC::MarkedBlock::allocator):
        (JSC::MarkedBlock::destructorType):
        * heap/MarkedSpace.cpp: Add the new destructor allocators to MarkedSpace.
        (JSC::MarkedSpace::MarkedSpace):
        (JSC::MarkedSpace::resetAllocators):
        (JSC::MarkedSpace::canonicalizeCellLivenessData):
        (JSC::MarkedSpace::isPagedOut):
        (JSC::MarkedSpace::freeBlock):
        * heap/MarkedSpace.h:
        (MarkedSpace):
        (JSC::MarkedSpace::immortalStructureDestructorAllocatorFor):
        (JSC::MarkedSpace::normalDestructorAllocatorFor):
        (JSC::MarkedSpace::allocateWithImmortalStructureDestructor):
        (JSC::MarkedSpace::allocateWithNormalDestructor):
        (JSC::MarkedSpace::forEachBlock):
        * heap/SlotVisitor.cpp: Add include because the symbol was needed in an inlined function.
        * jit/JIT.h: Make sure we use the correct allocator when doing inline allocations in the baseline JIT.
        * jit/JITInlineMethods.h:
        (JSC::JIT::emitAllocateBasicJSObject):
        (JSC::JIT::emitAllocateJSFinalObject):
        (JSC::JIT::emitAllocateJSArray):
        * jsc.cpp: 
        (GlobalObject::create): Add finalizer here since JSGlobalObject needs to use a finalizer instead of inheriting from 
        JSDestructibleObject.
        * runtime/Arguments.cpp: Inherit from JSDestructibleObject.
        (JSC):
        * runtime/Arguments.h:
        (Arguments):
        (JSC::Arguments::Arguments):
        * runtime/ErrorPrototype.cpp: Added an assert to make sure we have a trivial destructor.
        (JSC):
        * runtime/Executable.h: Indicate that all of the Executable* classes have immortal Structures.
        (JSC):
        * runtime/InternalFunction.cpp: Inherit from JSDestructibleObject.
        (JSC):
        (JSC::InternalFunction::InternalFunction):
        * runtime/InternalFunction.h:
        (InternalFunction):
        * runtime/JSCell.h: Added two static bools, needsDestruction and hasImmortalStructure, that classes can override 
        to indicate at compile time which part of the heap they should be allocated in.
        (JSC::allocateCell): Use the appropriate allocator depending on the destructor type.
        * runtime/JSDestructibleObject.h: Added. New class that stores the ClassInfo of any subclass so that it can be 
        accessed safely when the object is being destroyed.
        (JSC):
        (JSDestructibleObject):
        (JSC::JSDestructibleObject::classInfo):
        (JSC::JSDestructibleObject::JSDestructibleObject):
        (JSC::JSCell::classInfo): Checks the current MarkedBlock to see where it should get the ClassInfo from so that it's always safe.
        * runtime/JSGlobalObject.cpp: JSGlobalObject now uses a finalizer instead of a destructor so that it can avoid forcing all 
        of its relatives in the inheritance hierarchy (e.g. JSScope) to use destructors as well.
        (JSC::JSGlobalObject::reset):
        * runtime/JSGlobalObject.h:
        (JSGlobalObject):
        (JSC::JSGlobalObject::createRareDataIfNeeded): Since we always create a finalizer now, we don't have to worry about adding one 
        for the m_rareData field when it's created.
        (JSC::JSGlobalObject::create):
        (JSC):
        * runtime/JSGlobalThis.h: Inherit from JSDestructibleObject.
        (JSGlobalThis):
        (JSC::JSGlobalThis::JSGlobalThis):
        * runtime/JSPropertyNameIterator.h: Has an immortal Structure.
        (JSC):
        * runtime/JSScope.cpp:
        (JSC):
        * runtime/JSString.h: Has an immortal Structure.
        (JSC):
        * runtime/JSWrapperObject.h: Inherit from JSDestructibleObject.
        (JSWrapperObject):
        (JSC::JSWrapperObject::JSWrapperObject):
        * runtime/MathObject.cpp: Cleaning up some of the inheritance stuff.
        (JSC):
        * runtime/NameInstance.h: Inherit from JSDestructibleObject.
        (NameInstance):
        * runtime/RegExp.h: Has immortal Structure.
        (JSC):
        * runtime/RegExpObject.cpp: Inheritance cleanup.
        (JSC):
        * runtime/SparseArrayValueMap.h: Has immortal Structure.
        (JSC):
        * runtime/Structure.h: Has immortal Structure.
        (JSC):
        * runtime/StructureChain.h: Ditto.
        (JSC):
        * runtime/SymbolTable.h: Ditto.
        (SharedSymbolTable):
        (JSC):

== Rolled over to ChangeLog-2012-10-02 ==