Thread Safety Analysis:  Convert to minimal SSA.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@206681 91177308-0d34-0410-b5e6-96231b3b80d8
Speculative fix for buildbot failure. Apparently Clang 3.1 got move semantics wrong.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@206682 91177308-0d34-0410-b5e6-96231b3b80d8