https://bugs.webkit.org/show_bug.cgi?id=120551

Reviewed by Michael Saboff.
        
Fix the bug, and did a big clean-up of how Executable returns CodeBlocks. A lot
of the problems we have with code like CodeBlock::baselineVersion() is that we
were trying *way too hard* to side-step the fact that Executable can't return a
CodeBlock*. Previously it could only return CodeBlock&, so if it didn't have a
CodeBlock yet, you were screwed. And if you didn't know, or weren't sure, if it
did have a CodeBlock, you were really going to have a bad time. Also it really
bugs me that the methods were called generatedBytecode(). In all other contexts
if you ask for a CodeBlock, then method to call is codeBlock(). So I made all
of those changes.

* bytecode/CodeBlock.cpp:
(JSC::CodeBlock::baselineVersion):
(JSC::ProgramCodeBlock::replacement):
(JSC::EvalCodeBlock::replacement):
(JSC::FunctionCodeBlock::replacement):
(JSC::CodeBlock::globalObjectFor):
* bytecode/CodeOrigin.cpp:
(JSC::InlineCallFrame::hash):
* dfg/DFGOperations.cpp:
* interpreter/Interpreter.cpp:
(JSC::Interpreter::execute):
(JSC::Interpreter::executeCall):
(JSC::Interpreter::executeConstruct):
(JSC::Interpreter::prepareForRepeatCall):
* jit/JITCode.h:
(JSC::JITCode::isExecutableScript):
(JSC::JITCode::isLowerTier):
* jit/JITStubs.cpp:
(JSC::lazyLinkFor):
(JSC::DEFINE_STUB_FUNCTION):
* llint/LLIntSlowPaths.cpp:
(JSC::LLInt::traceFunctionPrologue):
(JSC::LLInt::LLINT_SLOW_PATH_DECL):
(JSC::LLInt::setUpCall):
* runtime/ArrayPrototype.cpp:
(JSC::isNumericCompareFunction):
* runtime/CommonSlowPaths.h:
(JSC::CommonSlowPaths::arityCheckFor):
* runtime/Executable.cpp:
(JSC::ScriptExecutable::installCode):
* runtime/Executable.h:
(JSC::EvalExecutable::codeBlock):
(JSC::ProgramExecutable::codeBlock):
(JSC::FunctionExecutable::eitherCodeBlock):
(JSC::FunctionExecutable::codeBlockForCall):
(JSC::FunctionExecutable::codeBlockForConstruct):
(JSC::FunctionExecutable::codeBlockFor):
* runtime/FunctionExecutableDump.cpp:
(JSC::FunctionExecutableDump::dump):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@154935 268f45cc-cd09-0410-ab3c-d52691b4dbfc