<https://webkit.org/b/119833> Concurrent compilation thread should not trigger WriteB...

<https://webkit.org/b/119833> Concurrent compilation thread should not trigger WriteBarriers

Reviewed by Oliver Hunt.

The concurrent compilation thread should interact minimally with the Heap, including not
triggering WriteBarriers. This is a prerequisite for generational GC.

* JavaScriptCore.xcodeproj/project.pbxproj:
* bytecode/CodeBlock.cpp:
(JSC::CodeBlock::addOrFindConstant):
(JSC::CodeBlock::findConstant):
* bytecode/CodeBlock.h:
(JSC::CodeBlock::addConstantLazily):
* dfg/DFGByteCodeParser.cpp:
(JSC::DFG::ByteCodeParser::getJSConstantForValue):
(JSC::DFG::ByteCodeParser::constantUndefined):
(JSC::DFG::ByteCodeParser::constantNull):
(JSC::DFG::ByteCodeParser::one):
(JSC::DFG::ByteCodeParser::constantNaN):
(JSC::DFG::ByteCodeParser::InlineStackEntry::InlineStackEntry):
* dfg/DFGCommonData.cpp:
(JSC::DFG::CommonData::notifyCompilingStructureTransition):
* dfg/DFGCommonData.h:
* dfg/DFGDesiredTransitions.cpp: Added.
(JSC::DFG::DesiredTransition::DesiredTransition):
(JSC::DFG::DesiredTransition::reallyAdd):
(JSC::DFG::DesiredTransitions::DesiredTransitions):
(JSC::DFG::DesiredTransitions::~DesiredTransitions):
(JSC::DFG::DesiredTransitions::addLazily):
(JSC::DFG::DesiredTransitions::reallyAdd):
* dfg/DFGDesiredTransitions.h: Added.
* dfg/DFGDesiredWeakReferences.cpp: Added.
(JSC::DFG::DesiredWeakReferences::DesiredWeakReferences):
(JSC::DFG::DesiredWeakReferences::~DesiredWeakReferences):
(JSC::DFG::DesiredWeakReferences::addLazily):
(JSC::DFG::DesiredWeakReferences::reallyAdd):
* dfg/DFGDesiredWeakReferences.h: Added.
* dfg/DFGDesiredWriteBarriers.cpp: Added.
(JSC::DFG::DesiredWriteBarrier::DesiredWriteBarrier):
(JSC::DFG::DesiredWriteBarrier::trigger):
(JSC::DFG::DesiredWriteBarriers::DesiredWriteBarriers):
(JSC::DFG::DesiredWriteBarriers::~DesiredWriteBarriers):
(JSC::DFG::DesiredWriteBarriers::addImpl):
(JSC::DFG::DesiredWriteBarriers::trigger):
* dfg/DFGDesiredWriteBarriers.h: Added.
(JSC::DFG::DesiredWriteBarriers::add):
(JSC::DFG::initializeLazyWriteBarrier):
* dfg/DFGFixupPhase.cpp:
(JSC::DFG::FixupPhase::truncateConstantToInt32):
* dfg/DFGGraph.h:
(JSC::DFG::Graph::convertToConstant):
* dfg/DFGJITCompiler.h:
(JSC::DFG::JITCompiler::addWeakReference):
* dfg/DFGPlan.cpp:
(JSC::DFG::Plan::Plan):
(JSC::DFG::Plan::reallyAdd):
* dfg/DFGPlan.h:
* dfg/DFGSpeculativeJIT32_64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* dfg/DFGSpeculativeJIT64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* runtime/WriteBarrier.h:
(JSC::WriteBarrierBase::set):
(JSC::WriteBarrier::WriteBarrier):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@154162 268f45cc-cd09-0410-ab3c-d52691b4dbfc