[all-commits] [llvm/llvm-project] d74c1b: [AMDGPU] Unify liveness guard to prevent SCC clobb...

[Domenic Nutile via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d74c1b77c61492ef6c5dc95bcd2b23685509379b
      https://github.com/llvm/llvm-project/commit/d74c1b77c61492ef6c5dc95bcd2b23685509379b
  Author: Domenic Nutile <domenic.nutile at gmail.com>
  Date:   2026-09-22 (Tue, 22 Sep 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SIRegisterInfo.cpp
    M llvm/test/CodeGen/AMDGPU/eliminate-frame-index-scalar-scc-clobber.mir

  Log Message:
  -----------
  [AMDGPU] Unify liveness guard to prevent SCC clobber in frame index lowering in scaling path (#223789)

eliminateFrameIndex has two lowering strategies, but only one has the
proper handling for checking SCC-liveness to prevent clobbering. Unify
them with a helper function to ensure both paths handle the same



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