tree 2a1bf633a0201b748631fb8fa90fa7c2280990cc
parent 02fb50d54042982bccc04c276ad2342827c8fcd3
author David Blaikie <dblaikie@gmail.com> 1361579374 +0000
committer David Blaikie <dblaikie@gmail.com> 1361579374 +0000

Remove the CFGElement "Invalid" state.

Use Optional<CFG*> where invalid states were needed previously. In the one case
where that's not possible (beginAutomaticObjDtorsInsert) just use a dummy
CFGAutomaticObjDtor.

Thanks for the help from Jordan Rose & discussion/feedback from Ted Kremenek
and Doug Gregor.

Post commit code review feedback on r175796 by Ted Kremenek.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175938 91177308-0d34-0410-b5e6-96231b3b80d8