[PATCH] D112467: [SLP]Do not reorder reduction nodes.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.
ABataev added reviewers: RKSimon, spatel, anton-afanasyev, dtemirbulatov.
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The final reduction nodes should not be reordered, the order does not
matter for reductions. Also, it might be profitable to vectorize smaller
reduction trees, reduction cost may compensate small tree cost.

Part of D111574 <https://reviews.llvm.org/D111574>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D112467

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/PhaseOrdering/X86/vector-reductions.ll
  llvm/test/Transforms/SLPVectorizer/X86/horizontal-list.ll

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