[all-commits] [llvm/llvm-project] eb7f12: [SLP]Fix narrowed leaf masks for demoted reduction...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: eb7f12adf832667a08debc0cdc65f762f615a99d
      https://github.com/llvm/llvm-project/commit/eb7f12adf832667a08debc0cdc65f762f615a99d
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2026-09-28 (Mon, 28 Sep 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    A llvm/test/Transforms/SLPVectorizer/X86/narrowed-reduction-minbw-root.ll

  Log Message:
  -----------
  [SLP]Fix narrowed leaf masks for demoted reduction root

The root of the narrowed-leaf reduction may be demoted and resized to the
reduction bitwidth of the wide reduction operations, while the masks are
built for the narrow leaves type, causes the crash.

Fixes https://github.com/llvm/llvm-project/pull/224919#issuecomment-5869787812

Reviewers: 

Pull Request: https://github.com/llvm/llvm-project/pull/227009



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