[PATCH] D134354: [AMDGPU][GlobalISel] Support mad/fma_mix selection

[Pierre van Houtryve via Phabricator via llvm-commits]

Pierre-vh updated this revision to Diff 463841.
Pierre-vh added a comment.

Rebase on tree that includes D134870 <https://reviews.llvm.org/D134870>.

All big regressions have been addressed, there's still a few minor differences between the DAG/GISel variants but I think they're not critical (I'll still look at them but please review in the meantime)
-> v_mad_mixhi_f16_f16lo_f16lo_f16lo_undeflo_clamp_precvt

  -> weird use of shl but it's just one extra inst

-> v_mad_mixhi_f16_f16lo_f16lo_f16lo_intpack

  -> constant rematerialization issue


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D134354/new/

https://reviews.llvm.org/D134354

Files:
  llvm/lib/Target/AMDGPU/AMDGPUGISel.td
  llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.cpp
  llvm/lib/Target/AMDGPU/AMDGPUInstructionSelector.h
  llvm/lib/Target/AMDGPU/VOP3PInstructions.td
  llvm/test/CodeGen/AMDGPU/GlobalISel/combine-fma-add-ext-fma.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/combine-fma-add-ext-mul.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/combine-fma-sub-ext-mul.ll
  llvm/test/CodeGen/AMDGPU/GlobalISel/combine-fma-sub-ext-neg-mul.ll
  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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