[all-commits] [llvm/llvm-project] e61071: [VPlan] Run final removeBranchOnConst after late s...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: e61071dda770c05e91319a46eef97e2bf9e9f007
      https://github.com/llvm/llvm-project/commit/e61071dda770c05e91319a46eef97e2bf9e9f007
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2026-06-13 (Sat, 13 Jun 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/VPlan.h
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.h
    M llvm/test/Transforms/LoopVectorize/AArch64/eliminate-tail-predication.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product-epilogue.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product-mixed.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-dot-product.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub-epilogue-vec.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/partial-reduce-sub.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/simple_early_exit.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-epilog-vect.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-interleaved-accesses.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-tail-folding.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/sve-widen-phi.ll
    M llvm/test/Transforms/LoopVectorize/AArch64/vector-loop-backedge-elimination-epilogue.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/fminimumnum.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/lmul.ll
    M llvm/test/Transforms/LoopVectorize/RISCV/truncate-to-minimal-bitwidth-evl-crash.ll

  Log Message:
  -----------
  [VPlan] Run final removeBranchOnConst after late simplifyRecipes. (#193069)

simplifyRecipes may expose additional known branches. Move final
removeBranchOnConst after the late simplifyRecipes run.

Removing branches like the vector loop backedge leads to additional
simplifications, like removing trivial phis etc. Return true if any phis
have incoming values have been removed by removeBranchOnConst. If so, we
need another simplifyRecipes run.

Depends on https://github.com/llvm/llvm-project/pull/193067 for
functional changes.

PR: https://github.com/llvm/llvm-project/pull/193069



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