[PATCH] D125287: [SLP] Improve root steering by building actual trees instead of calling the look-ahead heuristic

[Vasileios Porpodas via Phabricator via llvm-commits]

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Finding the best roots using the lookahead heuristic is not as accurate as
building short trees and comparing their cost.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D125287

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/X86/vectorize-pair-path.ll

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