[PATCH] D20555: [MemCpyOpt] Be conservative in the face of returns_twice calls

[David Majnemer via llvm-commits]

majnemer updated this revision to Diff 58457.
majnemer added a comment.

- Update the LangRef.


http://reviews.llvm.org/D20555

Files:
  docs/LangRef.rst
  lib/Analysis/CaptureTracking.cpp
  test/Transforms/FunctionAttrs/nocapture.ll

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