[all-commits] [llvm/llvm-project] 7f0421: [AMDGPU] Remove unsound idempotent atomicrmw to at...

[Arseniy Obolenskiy via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7f0421be7f82a64796fa002b85bedbd6eaacc57f
      https://github.com/llvm/llvm-project/commit/7f0421be7f82a64796fa002b85bedbd6eaacc57f
  Author: Arseniy Obolenskiy <arseniy.obolenskiy at amd.com>
  Date:   2026-09-09 (Wed, 09 Sep 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIISelLowering.cpp
    M llvm/lib/Target/AMDGPU/SIISelLowering.h
    M llvm/test/CodeGen/AMDGPU/idemponent-atomics.ll
    M llvm/test/CodeGen/AMDGPU/mmra.ll

  Log Message:
  -----------
  [AMDGPU] Remove unsound idempotent atomicrmw to atomic load lowering (#218377)

An idempotent atomicrmw still holds a slot in the modification order, so
folding it to a plain load can drop synchronization the memory model
requires



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