[all-commits] [llvm/llvm-project] 65b576: [AMDGPU] Disable atomic optimizer for single lane ...

[Carl Ritson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 65b576d2b0c49adf2d477e90b43ea9ef35b165c3
      https://github.com/llvm/llvm-project/commit/65b576d2b0c49adf2d477e90b43ea9ef35b165c3
  Author: Carl Ritson <carl.ritson at amd.com>
  Date:   2026-03-24 (Tue, 24 Mar 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/AMDGPUAtomicOptimizer.cpp
    A llvm/test/CodeGen/AMDGPU/atomic_optimizations_single_lane.ll

  Log Message:
  -----------
  [AMDGPU] Disable atomic optimizer for single lane execution (#187915)

Optimized IR will have worse performance when only a single lane is
active. Disable optimizer when single lane is expected at compile time.



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