[all-commits] [llvm/llvm-project] 788c86: AMDGPU: Optimize mfma_scale intrinsics with 0 inputs

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/gfx950/optimize-mfma-scale-0-inputs
  Home:   https://github.com/llvm/llvm-project
  Commit: 788c86e09028b90c377ea24dc4e0ab005cc12b4c
      https://github.com/llvm/llvm-project/commit/788c86e09028b90c377ea24dc4e0ab005cc12b4c
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2024-11-21 (Thu, 21 Nov 2024)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIInstrInfo.td
    M llvm/lib/Target/AMDGPU/VOP3PInstructions.td
    M llvm/test/CodeGen/AMDGPU/llvm.amdgcn.mfma.scale.f32.16x16x128.f8f6f4.ll
    M llvm/test/CodeGen/AMDGPU/llvm.amdgcn.mfma.scale.f32.32x32x64.f8f6f4.ll

  Log Message:
  -----------
  AMDGPU: Optimize mfma_scale intrinsics with 0 inputs

We can use the unscaled form of the instruction if we know the scale
factors are both 0.



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