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

Reid Kleckner via llvm-commits llvm-commits at lists.llvm.org
Tue May 24 11:57:38 PDT 2016

rnk added a comment.

I think the right fix is declare that volatile loads and stores "capture" their pointer operands, or to tease out some other function attribute like that. Your reduced test case from IRC shows how we incorrectly redirect volatile stores from y to x: https://ghostbin.com/paste/v5n3f


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