[all-commits] [llvm/llvm-project] 318e5a: [AMDGPU] Do not commute DPP instructions with a no...

[Arseniy Obolenskiy via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 318e5ab66c1496784eb16ed1af193a58c75efd59
      https://github.com/llvm/llvm-project/commit/318e5ab66c1496784eb16ed1af193a58c75efd59
  Author: Arseniy Obolenskiy <arseniy.obolenskiy at amd.com>
  Date:   2026-09-11 (Fri, 11 Sep 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIInstrInfo.cpp
    M llvm/lib/Target/AMDGPU/SIInstrInfo.h
    M llvm/test/CodeGen/AMDGPU/dpp_combine.ll
    M llvm/test/CodeGen/AMDGPU/si-fold-operands-gfx11.mir

  Log Message:
  -----------
  [AMDGPU] Do not commute DPP instructions with a non-identity dpp_ctrl (#218393)

DPP only swizzles src0, and that does not move with the operands, so
commuting changes which value each lane actually reads



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