[PATCH] D14045: [SimplifyLibCalls] Add a new transform: pow(exp(x), y) -> exp(x*y)

[Davide Italiano via llvm-commits]

davide updated this revision to Diff 38752.
davide added a comment.

Addressed Stephen's comments. Thank you for the explanation.
I added also some tests to ensure it's handled correctly with and without fast-math. I included a case for exp2, but not exp10 as it doesn't seem to be available on FreeBSD (GNU extension). I think we can leave that for a subsequent patch.


http://reviews.llvm.org/D14045

Files:
  lib/Transforms/Utils/SimplifyLibCalls.cpp
  test/Transforms/InstCombine/pow-exp-nofastmath.ll
  test/Transforms/InstCombine/pow-exp.ll
  test/Transforms/InstCombine/pow-exp2.ll

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