[all-commits] [llvm/llvm-project] 6bbfb6: PeepholeOpt: Immediately check if a reg_sequence c...

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/peephole-opt-check-regclass-supports-subreg-fix-expensive-checks
  Home:   https://github.com/llvm/llvm-project
  Commit: 6bbfb60112740293c710d21bf302123bbb9e492f
      https://github.com/llvm/llvm-project/commit/6bbfb60112740293c710d21bf302123bbb9e492f
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-02-22 (Sat, 22 Feb 2025)

  Changed paths:
    M llvm/lib/CodeGen/PeepholeOptimizer.cpp
    A llvm/test/CodeGen/Thumb2/peephole-opt-check-reg-sequence-compose-supports-subreg-index.ll

  Log Message:
  -----------
  PeepholeOpt: Immediately check if a reg_sequence compose supports a subregister

This is a quick fix for EXPENSIVE_CHECKS bot failures. I still think we could
defer looking for a compatible subregister further up the use-def chain, and
should be able to check compatibilty with the ultimate found source.



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