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

[Vasileios Porpodas via Phabricator via llvm-commits]

vporpo updated this revision to Diff 428774.
vporpo added a comment.

Disabled the scheduler for the fast buildtree.

I checked the compile time overhead with perf on the lit test, and it is about the same as the version before @vdmitrie's patch 88b9e46fb54c <https://reviews.llvm.org/rG88b9e46fb54c5321742d16016be5b2920facc018>.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D125287/new/

https://reviews.llvm.org/D125287

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/X86/insert-element-build-vector-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/X86/insert-element-build-vector.ll
  llvm/test/Transforms/SLPVectorizer/X86/pr48879-sroa.ll
  llvm/test/Transforms/SLPVectorizer/X86/vectorize-pair-path.ll

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