[PATCH] D18876: NFC: unify clang / LLVM atomic ordering

[JF Bastien via cfe-commits]

jfb updated this revision to Diff 53931.
jfb added a comment.

- Use validity checks, reduce casting while still avoiding UB on out-of-range enum values.


http://reviews.llvm.org/D18876

Files:
  include/clang/AST/Expr.h
  lib/CodeGen/CGAtomic.cpp
  lib/Sema/SemaChecking.cpp

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