[PATCH] D136442: [GISel] Add (fsub +-0.0, X) -> fneg combine

[Pierre van Houtryve via Phabricator via llvm-commits]

Pierre-vh created this revision.
Pierre-vh added a reviewer: arsenm.
Herald added subscribers: kosarev, kerbowa, hiraditya, jvesely.
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Pierre-vh requested review of this revision.
Herald added subscribers: llvm-commits, wdng.
Herald added a project: LLVM.

Allows for better matching of VOP3 mods.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D136442

Files:
  llvm/include/llvm/CodeGen/GlobalISel/CombinerHelper.h
  llvm/include/llvm/Target/GlobalISel/Combine.td
  llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
  llvm/test/CodeGen/AMDGPU/GlobalISel/combine-fsub-fneg.mir
  llvm/test/CodeGen/AMDGPU/GlobalISel/fmed3.ll
  llvm/test/CodeGen/AMDGPU/v_pack.ll

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