[PATCH] D49355: Thread safety analysis: Allow lock upgrading and downgrading

[Aaron Puchert via Phabricator via cfe-commits]

aaronpuchert created this revision.
aaronpuchert added reviewers: aaron.ballman, delesley.
Herald added a subscriber: cfe-commits.

We can now have methods that release a locked in shared mode and acquire
it in exclusive mode or the other way around. The fix was just to
release the locks before acquiring them.

Also added a few test cases for non-generic unlock methods and removed
an unnecessary const_cast.


Repository:
  rC Clang

https://reviews.llvm.org/D49355

Files:
  lib/Analysis/ThreadSafety.cpp
  test/SemaCXX/warn-thread-safety-analysis.cpp

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