[PATCH] D14400: [SimplifyLibCalls] Tranform log(pow(x, y)) -> y*log(x)

[Steve Canon via llvm-commits]

scanon added a comment.

The one thing that's a little bit weird here is cases like x = -1, y = 4; log(pow(-1, 4)) is 0, but 4*log(-1) is NaN.  That's a dramatic difference even for fast-math.  Do we find exact integer exponents before we get to this point?


http://reviews.llvm.org/D14400