[all-commits] [llvm/llvm-project] 695660: [AMDGPU] Provide control to force VGPR MFMA form (...

[Jeffrey Byrnes via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 695660cdfd1ca65cd6e02e6950d10c990dfa0036
      https://github.com/llvm/llvm-project/commit/695660cdfd1ca65cd6e02e6950d10c990dfa0036
  Author: Jeffrey Byrnes <jeffrey.byrnes at amd.com>
  Date:   2025-07-18 (Fri, 18 Jul 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIMachineFunctionInfo.cpp
    A llvm/test/CodeGen/AMDGPU/llvm.amdgcn.mfma.form.ll
    M llvm/test/CodeGen/AMDGPU/llvm.amdgcn.mfma.gfx950.ll

  Log Message:
  -----------
  [AMDGPU] Provide control to force VGPR MFMA form (#148079)

This gives an override to the user to force select VGPR form of MFMA.
Eventually we will drop this in favor of compiler making better
decisions, but this provides a mechanism for users to address the cases
where MayNeedAGPRs favors the AGPR form and performance is degraded due
to poor RA.



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