Reviewed by Geoffrey Garen.

        emitJumpIfNotJSCell should special case constant immediate values
        https://bugs.webkit.org/show_bug.cgi?id=39392
        <rdar://problem/8001324>

        Make emitJumpSlowCaseIfNotJSCell special case constant immediate
        values, in addition to the immediate JSCell optimisation.

        Also add assertions to make sure no one else produces code that
        attempts to load constants from the register file.

        * jit/JITInlineMethods.h:
        (JSC::JIT::emitJumpSlowCaseIfNotJSCell):
        * jit/JSInterfaceJIT.h:
        (JSC::JSInterfaceJIT::emitJumpIfNotJSCell):
        (JSC::JSInterfaceJIT::emitLoadInt32):
        (JSC::JSInterfaceJIT::tagFor):
        (JSC::JSInterfaceJIT::payloadFor):
        (JSC::JSInterfaceJIT::emitLoadDouble):
        (JSC::JSInterfaceJIT::addressFor):
        * jit/ThunkGenerators.cpp:
2010-05-19  Oliver Hunt  <oliver@apple.com>

        Reviewed by Geoffrey Garen.

        emitJumpIfNotJSCell should special case constant immediate values
        https://bugs.webkit.org/show_bug.cgi?id=39392

        Add tests for immediate constants being used where cells are expected.

        * fast/js/immediate-constant-instead-of-cell-expected.txt: Added.
        * fast/js/immediate-constant-instead-of-cell.html: Added.
        * fast/js/script-tests/immediate-constant-instead-of-cell.js: Added.
        ():

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@59798 268f45cc-cd09-0410-ab3c-d52691b4dbfc