[PATCH] D98995: [CGAtomic] Lift stronger requirements on cmpxch and add support for acquire failure mode

[Bruno Cardoso Lopes via Phabricator via llvm-commits]

bruno updated this revision to Diff 332823.
bruno edited the summary of this revision.
bruno added a comment.

@jfb sure!

Also fix test failures.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D98995/new/

https://reviews.llvm.org/D98995

Files:
  clang/lib/CodeGen/CGAtomic.cpp
  clang/test/CodeGen/atomic-ops.c
  clang/test/CodeGenOpenCL/atomic-ops.cl
  llvm/docs/LangRef.rst

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