[PATCH] [2/3] [SimplifyLibCalls] Refactor str/mem libcall handling: Factor out str/mem libcall optimizations

[Eric Christopher]

Checking inside the function for the name before doing things feels a bit icky, but I see where you're going with this and don't have a better idea at the moment.

LGTM.

-eric


http://reviews.llvm.org/D6540

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