https://bugs.webkit.org/show_bug.cgi?id=121057

Reviewed by Filip Pizlo.

Unify all references to an invalid virtual register to be the enum InvalidVirtualRegister.
Changed the value of InvalidVirtualRegister to be maximum integer value.

* bytecode/CodeBlock.h:
(JSC::CodeBlock::setArgumentsRegister):
(JSC::CodeBlock::usesArguments):
* bytecode/LazyOperandValueProfile.h:
(JSC::LazyOperandValueProfileKey::LazyOperandValueProfileKey):
(JSC::LazyOperandValueProfileKey::operator!):
(JSC::LazyOperandValueProfileKey::isHashTableDeletedValue):
(JSC::LazyOperandValueProfile::LazyOperandValueProfile):
* bytecode/UnlinkedCodeBlock.cpp:
(JSC::UnlinkedCodeBlock::UnlinkedCodeBlock):
* bytecode/UnlinkedCodeBlock.h:
(JSC::UnlinkedCodeBlock::usesArguments):
(JSC::UnlinkedCodeBlock::usesGlobalObject):
* bytecode/VirtualRegister.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@155420 268f45cc-cd09-0410-ab3c-d52691b4dbfc