Thread-safety analysis: eliminate false positives in case where the definition
duplicates attributes on the declaration.  Also eliminates a false negative in
ReleasableMutexLock.  Fixing this bug required some refactoring.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@159780 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed