[PATCH] D28364: SimplifyLibCalls: Remove incorrect optimization of fabs

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added reviewers: scanon, efriedma.
arsenm added a subscriber: llvm-commits.
Herald added a subscriber: wdng.

fabs(x * x) is not generally safe to assume x is positive if x is a NaN.
This is also less general than it could be, so this will be replaced
with a transformation on the intrinsic.


https://reviews.llvm.org/D28364

Files:
  lib/Transforms/Utils/SimplifyLibCalls.cpp
  test/Transforms/InstCombine/fabs.ll
  test/Transforms/InstCombine/fast-math.ll

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