[all-commits] [llvm/llvm-project] 12e79f: AArch64: Mark the NZCV def dead for unused overflo...

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/aarch64/overflow-op-dead-nzcv
  Home:   https://github.com/llvm/llvm-project
  Commit: 12e79f7fef230cd42bc42ffd4d8833409a15d28d
      https://github.com/llvm/llvm-project/commit/12e79f7fef230cd42bc42ffd4d8833409a15d28d
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-28 (Mon, 28 Sep 2026)

  Changed paths:
    M llvm/lib/Target/AArch64/GISel/AArch64InstructionSelector.cpp
    M llvm/test/CodeGen/AArch64/GlobalISel/select-sadde.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/select-saddo.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/select-ssube.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/select-ssubo.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/select-uadde.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/select-uaddo.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/select-usube.mir
    M llvm/test/CodeGen/AArch64/GlobalISel/select-usubo.mir

  Log Message:
  -----------
  AArch64: Mark the NZCV def dead for unused overflow results

Avoid implicitly depending on later recomputed dead flags.

Co-Authored-By: Claude Opus 5 <noreply at anthropic.com>



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