[PATCH] D28783: AMDGPU: Check if users of fneg can fold mods

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
Herald added a reviewer: tstellarAMD.
Herald added subscribers: tony-tye, yaxunl, nhaehnle, wdng, kzhuravl.

In multi-use cases this can save a few instructions.


https://reviews.llvm.org/D28783

Files:
  lib/Target/AMDGPU/AMDGPUISelLowering.cpp
  test/CodeGen/AMDGPU/fmul-2-combine-multi-use.ll
  test/CodeGen/AMDGPU/fneg-combines.ll
  test/CodeGen/AMDGPU/frem.ll
  test/CodeGen/AMDGPU/v_mac_f16.ll

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