[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 added a comment.

This fixes a regression in SingleSource/Benchmarks/Misc/flops-5.c. Increasing the RootLookaheadMaxDepth doesn't fix the issue either. Building small trees instead of calling the lookahead heuristic seems to be more accurate in this case.


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D125287/new/

https://reviews.llvm.org/D125287