[all-commits] [llvm/llvm-project] 148ee2: [SLP] Fix dep accounting when cancelling a bundle ...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 148ee2b266b73a49f1f31d0bd17d4818b91bee9f
      https://github.com/llvm/llvm-project/commit/148ee2b266b73a49f1f31d0bd17d4818b91bee9f
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2026-09-12 (Sat, 12 Sep 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    A llvm/test/Transforms/SLPVectorizer/X86/cancelled-copyable-self-use-deps.ll

  Log Message:
  -----------
  [SLP] Fix dep accounting when cancelling a bundle with copyable elements

Restore the parent-edge copyable data as a user of the instruction only
if the cancelled element displaced it at creation (chained copyable
self-use); otherwise the extra user dependency is never released and
scheduling asserts.

Fixes #223139

Reviewers: 

Pull Request: https://github.com/llvm/llvm-project/pull/223174



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