[PATCH] D28405: SimplifyLibCalls: Replace fabs libcalls with intrinsics

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added a reviewer: efriedma.
arsenm added a subscriber: llvm-commits.
Herald added a subscriber: wdng.

Add missing fabs(fpext) optimzation that worked with the call,
and also fixes it creating a second fpext when there were multiple
uses.


https://reviews.llvm.org/D28405

Files:
  include/llvm/IR/PatternMatch.h
  lib/Transforms/InstCombine/InstCombineCalls.cpp
  lib/Transforms/Utils/SimplifyLibCalls.cpp
  test/Transforms/InstCombine/double-float-shrink-2.ll
  test/Transforms/InstCombine/fabs.ll
  test/Transforms/InstCombine/float-shrink-compare.ll
  test/Transforms/InstCombine/pow-1.ll
  test/Transforms/InstCombine/win-math.ll
  test/Transforms/InstCombine/zero-point-zero-add.ll

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