[all-commits] [llvm/llvm-project] 6073fd: [VPlan] Directly check if middle block is pred of ...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 6073fde018a71ed364b1fe3c052c920b8b032deb
      https://github.com/llvm/llvm-project/commit/6073fde018a71ed364b1fe3c052c920b8b032deb
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2026-04-13 (Mon, 13 Apr 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlan.h
    A llvm/test/Transforms/LoopVectorize/tail-folding-constant-trip-counts.ll

  Log Message:
  -----------
  [VPlan] Directly check if middle block is pred of scalar preheader. (#191768)

hasScalarTail currently returns incorrect results when queried after
runtime checks have been added. Generalize and harden by checking if the
middle block is a predecessor of the scalar preheader.



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