[all-commits] [llvm/llvm-project] d32d67: AMDGPU: Improve cost handling of fma/fmuladd

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/amdgpu-fix-fma-fmuladd-costs
  Home:   https://github.com/llvm/llvm-project
  Commit: d32d67b4978b76b19c843dbe332760de3cfb0b18
      https://github.com/llvm/llvm-project/commit/d32d67b4978b76b19c843dbe332760de3cfb0b18
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2024-07-30 (Tue, 30 Jul 2024)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/AMDGPU/fma.ll
    M llvm/test/Analysis/CostModel/AMDGPU/fmuladd.ll

  Log Message:
  -----------
  AMDGPU: Improve cost handling of fma/fmuladd

We were overcounting the cost of fast f32 FMA. Also address todo
and handle fmuladd (which I'm just assuming lowers to FMA, the slow FMA
expansion is about as fast on slow targets anyway).



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