[all-commits] [llvm/llvm-project] eea069: [SLP]Fix crash erasing reduced value extract still...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: eea06905d642dfd1c37259bee3f3dd43e0dabd00
      https://github.com/llvm/llvm-project/commit/eea06905d642dfd1c37259bee3f3dd43e0dabd00
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2026-06-25 (Thu, 25 Jun 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    A llvm/test/Transforms/SLPVectorizer/X86/copyable-reduced-erased.ll

  Log Message:
  -----------
  [SLP]Fix crash erasing reduced value extract still used by reduction

A reduced value vectorized in an operand subtree is replaced by an
extractelement that can be excluded from another reduction group's
candidates as incompatible, yet it is still consumed by the final
reduction. Keep such excluded extracts externally used so they are not
erased while vectorizing that group.

Fixes #205886

Reviewers: 

Pull Request: https://github.com/llvm/llvm-project/pull/205942



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