[PATCH] [RFC] Patch for Bug 18808 - clang -O3 -flto drops Target feature flags

[Eric Christopher]

The original set of patches was clang r232888 and llvm r232885. The clang
one was reverted and reapplied after fixes for sse4 in r233227.

-eric


REPOSITORY
  rL LLVM

http://reviews.llvm.org/D8629

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