Fix a bad interaction between -Wtautological-overlap-compare and delayed
diagnostics which caused delayed diagnostics on dead paths to be emitted.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@206232 91177308-0d34-0410-b5e6-96231b3b80d8
Fix typo from r206232


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@206234 91177308-0d34-0410-b5e6-96231b3b80d8
Partial revert of r206229, to get the build bots green again.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@206237 91177308-0d34-0410-b5e6-96231b3b80d8