[PATCH] D17951: Implement is_always_lock_free

[JF Bastien via cfe-commits]

jfb updated this revision to Diff 51607.
jfb added a comment.
Herald added a subscriber: jfb.

- Check feature test macro exists


http://reviews.llvm.org/D17951

Files:
  include/atomic
  test/std/atomics/atomics.lockfree/isalwayslockfree.pass.cpp

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