[all-commits] [llvm/llvm-project] 709ef4: ARM: Avoid relying on kill flags for determining C...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 709ef4b96668471c7be0bd67abece4ebfce62a22
      https://github.com/llvm/llvm-project/commit/709ef4b96668471c7be0bd67abece4ebfce62a22
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-13 (Sun, 13 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 (#222873)

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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