[PATCH] D134793: [AMDGPU] Update `mad-mix*` CodeGen tests

[Pierre van Houtryve via Phabricator via llvm-commits]

Pierre-vh created this revision.
Pierre-vh added a reviewer: arsenm.
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- Use `fneg %a` instead of `fsub -0.0, %a`
  - This is for D134354 <https://reviews.llvm.org/D134354> as we don't currently support folding `fsub -0.0, %a` into `fneg` on GISel. Also, `fneg` is the canonical way to do the negation.
- Switch to `update_llc_test_checks`-generated tests.
  - Better test coverage
  - Easier to update
  - Easier to see changes in future diffs
- Remove unnecessary CL arguments in RUN lines

Motive for the patch: Preparation for D134354 <https://reviews.llvm.org/D134354> - we would like to
put GISel tests in this file as well. Fixing the lack of `fneg` and
switching to generated testing makes it much easier.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D134793

Files:
  llvm/test/CodeGen/AMDGPU/mad-mix-hi.ll
  llvm/test/CodeGen/AMDGPU/mad-mix-lo.ll
  llvm/test/CodeGen/AMDGPU/mad-mix.ll

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