CodeBlock::m_numCalleeRegisters shouldn't also mean frame size, frame size needed for exit, or any other unrelated things
https://bugs.webkit.org/show_bug.cgi?id=124793

Reviewed by Mark Hahnenberg.
        
Now m_numCalleeRegisters always refers to the number of locals that the attached
bytecode uses. It never means anything else.
        
For frame size, we now have it lazily computed from m_numCalleeRegisters for the
baseline engines and we have it stored in DFG::CommonData for the optimizing JITs.
        
For frame-size-needed-at-exit, we store that in DFG::CommonData, too.
        
The code no longer implies that there is any arithmetic relationship between
m_numCalleeRegisters and frameSize. Previously it implied that the latter is greater
than the former.
        
The code no longer implies that there is any arithmetic relationship between the
frame Size and the frame-size-needed-at-exit. Previously it implied that the latter
is greater that the former.

* bytecode/CodeBlock.cpp:
(JSC::CodeBlock::frameRegisterCount):
* bytecode/CodeBlock.h:
* dfg/DFGCommonData.h:
(JSC::DFG::CommonData::CommonData):
(JSC::DFG::CommonData::requiredRegisterCountForExecutionAndExit):
* dfg/DFGGraph.cpp:
(JSC::DFG::Graph::frameRegisterCount):
(JSC::DFG::Graph::requiredRegisterCountForExit):
(JSC::DFG::Graph::requiredRegisterCountForExecutionAndExit):
* dfg/DFGGraph.h:
* dfg/DFGJITCompiler.cpp:
(JSC::DFG::JITCompiler::link):
(JSC::DFG::JITCompiler::compileFunction):
* dfg/DFGOSREntry.cpp:
(JSC::DFG::prepareOSREntry):
* dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::SpeculativeJIT::SpeculativeJIT):
* dfg/DFGVirtualRegisterAllocationPhase.cpp:
(JSC::DFG::VirtualRegisterAllocationPhase::run):
* ftl/FTLLink.cpp:
(JSC::FTL::link):
* ftl/FTLLowerDFGToLLVM.cpp:
(JSC::FTL::LowerDFGToLLVM::compileCallOrConstruct):
* ftl/FTLOSREntry.cpp:
(JSC::FTL::prepareOSREntry):
* interpreter/CallFrame.cpp:
(JSC::CallFrame::frameExtentInternal):
* interpreter/JSStackInlines.h:
(JSC::JSStack::pushFrame):
* jit/JIT.h:
(JSC::JIT::frameRegisterCountFor):
* jit/JITOperations.cpp:
* llint/LLIntEntrypoint.cpp:
(JSC::LLInt::frameRegisterCountFor):
* llint/LLIntEntrypoint.h:



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@159721 268f45cc-cd09-0410-ab3c-d52691b4dbfc