[all-commits] [llvm/llvm-project] de734c: AMDGPU: Preserve carry-out dead flag in V_ADD_CO_U...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: de734ce70b5e9c3c4eeca4306394c1bec1c30f84
      https://github.com/llvm/llvm-project/commit/de734ce70b5e9c3c4eeca4306394c1bec1c30f84
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-23 (Wed, 23 Sep 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIISelLowering.cpp
    A llvm/test/CodeGen/AMDGPU/finalize-isel-vadd-co-u32-dead-carry.mir
    M llvm/test/CodeGen/AMDGPU/sdiv64.ll

  Log Message:
  -----------
  AMDGPU: Preserve carry-out dead flag in V_ADD_CO_U32 custom inserter (#225736)

EmitInstrWithCustomInserter rebuilds V_ADD/SUB_CO_U32_e32 but did
not carry over the dead flag. Preserve the flag to reduce implicitly
depending on dead flags recomputed by LiveVariables.

Co-authored-by: Claude (Opus 4.8) <noreply at anthropic.com>



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