possibility of inlining
https://bugs.webkit.org/show_bug.cgi?id=70068

Reviewed by Oliver Hunt.
        
CodeBlock can now track, as part of its RareData, the virtual inline
stack at callsites. CallFrame walking can now rematerialize "inline"
CallFrames by combining the meta-data in CodeBlock with the information
already in the JS stack. Arguments can now safely retrieve the
arguments from inline CallFrames.
        
The DFG already had the notion of a "CodeOrigin" in preparation for
inlining. This notion will now be saved into the CodeBlock, if the DFG
had done inlining. So, CodeOrigin has been moved to bytecode/ and has
been changed to behave more like a struct since that is how it's
meant to be used.

* GNUmakefile.list.am:
* JavaScriptCore.vcproj/JavaScriptCore/JavaScriptCore.vcproj:
* JavaScriptCore.xcodeproj/project.pbxproj:
* bytecode/CodeBlock.h:
(JSC::CodeBlock::inlineCallFrames):
(JSC::CodeBlock::codeOrigins):
(JSC::CodeBlock::hasCodeOrigins):
(JSC::CodeBlock::codeOriginForReturn):
* bytecode/CodeOrigin.h: Added.
(JSC::CodeOrigin::CodeOrigin):
(JSC::CodeOrigin::isSet):
(JSC::getCallReturnOffsetForCodeOrigin):
* dfg/DFGJITCompiler.cpp:
(JSC::DFG::JITCompiler::link):
* dfg/DFGNode.h:
* dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* dfg/DFGSpeculativeJIT32_64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* dfg/DFGSpeculativeJIT64.cpp:
(JSC::DFG::SpeculativeJIT::compile):
* interpreter/CallFrame.cpp:
(JSC::CallFrame::isInlineCallFrame):
(JSC::CallFrame::trueCallerFrame):
* interpreter/CallFrame.h:
(JSC::ExecState::inlineCallFrame):
(JSC::ExecState::setInlineCallFrame):
(JSC::ExecState::isInlineCallFrame):
(JSC::ExecState::trueCallerFrame):
* interpreter/Interpreter.cpp:
(JSC::Interpreter::findFunctionCallFrame):
* interpreter/Register.h:
(JSC::Register::operator=):
(JSC::Register::inlineCallFrame):
* runtime/Arguments.h:
(JSC::Arguments::getArgumentsData):
(JSC::Arguments::finishCreationButDontCopyRegisters):
(JSC::Arguments::finishCreation):
(JSC::Arguments::finishCreationAndCopyRegisters):
* runtime/Executable.h:
(JSC::FunctionExecutable::parameterCount):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@97512 268f45cc-cd09-0410-ab3c-d52691b4dbfc