[all-commits] [llvm/llvm-project] b6865c: ARM: Avoid relying on kill flags for determining C...

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/arm/cbz-cpsr-liveness
  Home:   https://github.com/llvm/llvm-project
  Commit: b6865cd441ce72be2e21fb2b369331731cb62bf2
      https://github.com/llvm/llvm-project/commit/b6865cd441ce72be2e21fb2b369331731cb62bf2
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-11 (Fri, 11 Sep 2026)

  Changed paths:
    M llvm/lib/Target/ARM/ARMConstantIslandPass.cpp
    A llvm/test/CodeGen/ARM/cbz-no-kill-flag.mir

  Log Message:
  -----------
  ARM: Avoid relying on kill flags for determining CPSR liveness

When forming CBZ/CBNZ in ARMConstantIslands, check if CPSR is live-out
of the block instead of relying on the kill flag. Kill flags have been
soft deprecated for over a decade.

Co-authored-by: Claude claude-opus-4.8 <noreply at anthropic.com>



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