[all-commits] [llvm/llvm-project] cb7500: AMDGPU: Mark the SCC def dead when expanding CF ps...

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/amdgpu/lower-control-flow-dead-scc
  Home:   https://github.com/llvm/llvm-project
  Commit: cb7500aac9928e4774c005858786825c46fb9353
      https://github.com/llvm/llvm-project/commit/cb7500aac9928e4774c005858786825c46fb9353
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-25 (Fri, 25 Sep 2026)

  Changed paths:
    M llvm/lib/Target/AMDGPU/SILowerControlFlow.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/divergence-divergent-i1-phis-no-lane-mask-merging.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/divergence-divergent-i1-used-outside-loop.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/divergence-structurizer.ll
    M llvm/test/CodeGen/AMDGPU/GlobalISel/divergence-temporal-divergent-i1.ll
    M llvm/test/CodeGen/AMDGPU/block-should-not-be-in-alive-blocks.mir
    M llvm/test/CodeGen/AMDGPU/branch-folding-implicit-def-subreg.ll
    M llvm/test/CodeGen/AMDGPU/collapse-endcf.mir
    M llvm/test/CodeGen/AMDGPU/divergent-branch-uniform-condition.ll
    M llvm/test/CodeGen/AMDGPU/i1-copy-from-loop.ll
    M llvm/test/CodeGen/AMDGPU/insert-waitcnts-merge.ll
    M llvm/test/CodeGen/AMDGPU/loop_break.ll
    M llvm/test/CodeGen/AMDGPU/lower-control-flow-live-intervals.mir
    M llvm/test/CodeGen/AMDGPU/lower-control-flow-live-variables-update.mir
    M llvm/test/CodeGen/AMDGPU/lower-control-flow-other-terminators.mir
    M llvm/test/CodeGen/AMDGPU/sgpr-scavenge-fi-stack-id.ll
    M llvm/test/CodeGen/AMDGPU/si-lower-control-flow-remove-redundant-block-liveintervals.mir
    M llvm/test/CodeGen/AMDGPU/si-lower-control-flow.mir
    M llvm/test/CodeGen/AMDGPU/transform-block-with-return-to-epilog.ll

  Log Message:
  -----------
  AMDGPU: Mark the SCC def dead when expanding CF pseudos

The control flow pseudos start with dead flags on the implicit scc def,
but did not transfer to the replacement instruction

Co-Authored-By: Claude Opus 5 <noreply at anthropic.com>



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