[all-commits] [llvm/llvm-project] c322a0: [SLP]Do not throttle nodes with split parents, if ...

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c322a0c462b1b277e5862aeae2e95a40f7b130d4
      https://github.com/llvm/llvm-project/commit/c322a0c462b1b277e5862aeae2e95a40f7b130d4
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2026-01-15 (Thu, 15 Jan 2026)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    A llvm/test/Transforms/SLPVectorizer/X86/split-node-throttled.ll

  Log Message:
  -----------
  [SLP]Do not throttle nodes with split parents, if any of scalars is used in more than one split nodes

If the the node to throttle is a vector node, which is used in split
node, and at least one scalar of such a node is used in many split
nodes, such vector node should be throttled. otherise there might be
wrong def-use chain, which crashes the compiler.

Fixes #175967



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