[all-commits] [llvm/llvm-project] 4e5004: AMDGPU: Mark the SCC def dead when expanding CF ps...

[Matt Arsenault via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 4e50049d9d5b44028c9cca9763f6ceeda1c667fb
      https://github.com/llvm/llvm-project/commit/4e50049d9d5b44028c9cca9763f6ceeda1c667fb
  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 (#226249)

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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