[all-commits] [llvm/llvm-project] 7d01a8: [SLP]Fix vector factor for repeated node for bv

[Alexey Bataev via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7d01a8f2b9ac28ffe73bef4b513d383d3edf34b5
      https://github.com/llvm/llvm-project/commit/7d01a8f2b9ac28ffe73bef4b513d383d3edf34b5
  Author: Alexey Bataev <a.bataev at outlook.com>
  Date:   2025-01-20 (Mon, 20 Jan 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
    M llvm/test/Transforms/SLPVectorizer/X86/multi-node-reuse-in-bv.ll

  Log Message:
  -----------
  [SLP]Fix vector factor for repeated node for bv

When adding a node vector, when it is used already in the shuffle for
buildvector, need to calculate vector factor from all vector, not only
this single vector, to avoid incorrect result. Also, need to increase
stability of the reused entries detection to avoid mismatch in cost
estimation/codegen.

Fixes #123639



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