[all-commits] [llvm/llvm-project] 52d744: 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: 52d7449bfece16ef422064c26deb8aa2651d5fdd
      https://github.com/llvm/llvm-project/commit/52d7449bfece16ef422064c26deb8aa2651d5fdd
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2026-09-24 (Thu, 24 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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