[all-commits] [llvm/llvm-project] d21fc5: AMDGPU: Use default shouldRewriteCopySrc (#125535)

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d21fc58aeeaa7f0369a24dbe70a0360e0edbf76f
      https://github.com/llvm/llvm-project/commit/d21fc58aeeaa7f0369a24dbe70a0360e0edbf76f
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-02-07 (Fri, 07 Feb 2025)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
    M llvm/lib/Target/AMDGPU/SIRegisterInfo.h
    M llvm/test/CodeGen/AMDGPU/copy-illegal-type.ll
    M llvm/test/CodeGen/AMDGPU/ctpop64.ll
    M llvm/test/CodeGen/AMDGPU/idot2.ll
    M llvm/test/CodeGen/AMDGPU/load-global-i32.ll
    M llvm/test/CodeGen/AMDGPU/peephole-opt-fold-reg-sequence-subreg.mir
    M llvm/test/CodeGen/AMDGPU/peephole-opt-regseq-removal.mir
    M llvm/test/CodeGen/AMDGPU/spill-scavenge-offset.ll

  Log Message:
  -----------
  AMDGPU: Use default shouldRewriteCopySrc (#125535)

This was ultimately working around bugs in subregister handling
in peephole-opt. In the common case, it would give up on folding
anything into a subregister extract copy.



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