[all-commits] [llvm/llvm-project] c50539: AMDGPU: Use minnum instead of maxnum for fmed3 src...

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/amdgpu/fix-nan-constant-src2-fmed3-fold-minnum-not-maxnum
  Home:   https://github.com/llvm/llvm-project
  Commit: c50539d62fb4d633753fdbad977839205a7ab3ac
      https://github.com/llvm/llvm-project/commit/c50539d62fb4d633753fdbad977839205a7ab3ac
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-05-12 (Mon, 12 May 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUInstCombineIntrinsic.cpp
    M llvm/test/Transforms/InstCombine/AMDGPU/fmed3.ll

  Log Message:
  -----------
  AMDGPU: Use minnum instead of maxnum for fmed3 src2-nan fold

By the pseudocode in the ISA manual, if any input is a nan it acts
like min3, which will fold to min2 of the other operands. The other
cases fold to min, I'm not sure how this one was wrong.



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