[all-commits] [llvm/llvm-project] dd4b3b: [AMDGPU] Price only the fmul that fuses into an fa...

[Gheorghe-Teodor Bercea via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dd4b3b7f0880c5bd15cea1867f0c4b30468fdd0c
      https://github.com/llvm/llvm-project/commit/dd4b3b7f0880c5bd15cea1867f0c4b30468fdd0c
  Author: Gheorghe-Teodor Bercea <gt.bercea at gmail.com>
  Date:   2026-09-24 (Thu, 24 Sep 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUTargetTransformInfo.cpp
    M llvm/test/Analysis/CostModel/AMDGPU/fused_costs.ll
    A llvm/test/Transforms/SLPVectorizer/AMDGPU/complex-mul-fma.ll

  Log Message:
  -----------
  [AMDGPU] Price only the fmul that fuses into an fadd/fsub as free (#226009)

An fadd/fsub with two fmul operands can fuse with only one of them into
an FMA. Currently they are both priced as if they are fused (i.e. free).



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