[all-commits] [llvm/llvm-project] 0513c3: [GlobalISel] When folding to fma correctly find fp...

[LU-JOHN via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0513c32abe1eff329fd22b578f4995e59d6140a2
      https://github.com/llvm/llvm-project/commit/0513c32abe1eff329fd22b578f4995e59d6140a2
  Author: LU-JOHN <John.Lu at amd.com>
  Date:   2026-09-07 (Mon, 07 Sep 2026)

  Changed paths:
    M llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/combine-fma-add-ext-mul.ll

  Log Message:
  -----------
  [GlobalISel] When folding to fma correctly find fpext(fmul) with fewer uses (#218013)

When folding: `(fadd (fpext (fmul x, y)), z) -> (fma (fpext x), (fpext
y), z)` and both addends are candidates, correctly pick the side with
fewer uses. Previously the code looked for a `fmul` with the fewest uses
rather than a `fpext(fmul)`.

---------

Signed-off-by: John Lu <John.Lu at amd.com>



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications