[all-commits] [llvm/llvm-project] c2f7c8: StructurizeCFG: Use poison instead of undef

[Matt Arsenault via All-commits]

  Branch: refs/heads/users/arsenm/structurizecfg-use-poison-instead-of-undef
  Home:   https://github.com/llvm/llvm-project
  Commit: c2f7c83683e432cb7c1850de36e25614a3efddbb
      https://github.com/llvm/llvm-project/commit/c2f7c83683e432cb7c1850de36e25614a3efddbb
  Author: Matt Arsenault <Matthew.Arsenault at amd.com>
  Date:   2025-03-09 (Sun, 09 Mar 2025)

  Changed paths:
    M llvm/lib/Transforms/Scalar/StructurizeCFG.cpp
    M llvm/test/CodeGen/AMDGPU/GlobalISel/divergent-control-flow.ll
    M llvm/test/CodeGen/AMDGPU/agpr-copy-no-free-registers.ll
    M llvm/test/CodeGen/AMDGPU/blender-no-live-segment-at-def-implicit-def.ll
    M llvm/test/CodeGen/AMDGPU/branch-folding-implicit-def-subreg.ll
    M llvm/test/CodeGen/AMDGPU/itofp.i128.bf.ll
    M llvm/test/CodeGen/AMDGPU/itofp.i128.ll
    M llvm/test/CodeGen/AMDGPU/loop_break.ll
    M llvm/test/CodeGen/AMDGPU/multi-divergent-exit-region.ll
    M llvm/test/CodeGen/AMDGPU/multilevel-break.ll
    M llvm/test/CodeGen/AMDGPU/nested-loop-conditions.ll
    M llvm/test/CodeGen/AMDGPU/optimize-negated-cond.ll
    M llvm/test/CodeGen/AMDGPU/scheduler-rp-calc-one-successor-two-predecessors-bug.ll
    M llvm/test/CodeGen/AMDGPU/si-annotate-dbg-info.ll
    M llvm/test/CodeGen/AMDGPU/tuple-allocation-failure.ll
    M llvm/test/CodeGen/AMDGPU/vgpr-liverange-ir.ll
    M llvm/test/Transforms/StructurizeCFG/AMDGPU/loop-subregion-misordered.ll
    M llvm/test/Transforms/StructurizeCFG/AMDGPU/uniform-regions.ll
    M llvm/test/Transforms/StructurizeCFG/interleaved-loop-order.ll
    M llvm/test/Transforms/StructurizeCFG/loop-break-phi.ll
    M llvm/test/Transforms/StructurizeCFG/loop-continue-phi.ll
    M llvm/test/Transforms/StructurizeCFG/one-loop-multiple-backedges.ll
    M llvm/test/Transforms/StructurizeCFG/structurizer-keep-perf-md.ll
    M llvm/test/Transforms/StructurizeCFG/workarounds/needs-fix-reducible.ll
    M llvm/test/Transforms/StructurizeCFG/workarounds/needs-fr-ule.ll
    M llvm/test/Transforms/StructurizeCFG/workarounds/needs-unified-loop-exits.ll

  Log Message:
  -----------
  StructurizeCFG: Use poison instead of undef

There are a surprising number of codegen changes from this.



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