https://bugs.webkit.org/show_bug.cgi?id=80330

Reviewed by Filip Pizlo.

This change is performance neutral on the JS benchmarks we track. It's mostly to improve page
load performance, which currently does at least a couple full GCs per navigation.

* heap/Heap.cpp:
(JSC::Heap::discardAllCompiledCode): Rename recompileAllJSFunctions to discardAllCompiledCode
because the function doesn't actually recompile anything (and never did); it simply throws code
away for it to be recompiled later if we determine we should do so.
(JSC):
(JSC::Heap::collectAllGarbage):
(JSC::Heap::addFunctionExecutable): Adds a newly created FunctionExecutable to the Heap's list.
(JSC::Heap::removeFunctionExecutable): Removes the specified FunctionExecutable from the Heap's list.
* heap/Heap.h:
(JSC):
(Heap):
* runtime/Executable.cpp: Added next and prev fields to FunctionExecutables so that they can
be used in DoublyLinkedLists.
(JSC::FunctionExecutable::FunctionExecutable):
(JSC::FunctionExecutable::finalize): Removes the FunctionExecutable from the Heap's list.
* runtime/Executable.h:
(FunctionExecutable):
(JSC::FunctionExecutable::create): Adds the FunctionExecutable to the Heap's list.
* runtime/JSGlobalData.cpp: Remove recompileAllJSFunctions, as it's the Heap's job to own and manage
the list of FunctionExecutables.
* runtime/JSGlobalData.h:
(JSGlobalData):
* runtime/JSGlobalObject.cpp:
(JSC::DynamicGlobalObjectScope::DynamicGlobalObjectScope): Use the new discardAllCompiledCode.


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@112624 268f45cc-cd09-0410-ab3c-d52691b4dbfc