[PATCH] D57779: [SLP] Add support for throttling.

Mon Mar 9 13:30:52 PDT 2020

dtemirbulatov updated this revision to Diff 249197.
dtemirbulatov added a comment.

Rebased, fix regression in pr35497.ll with extra extract instruction, it was caused by partial vectorization preventing the reduction by changing BB too early. Added functionality of doing throttling as the last one but without rebuilding tree again.  It is done by saving tree states for profitable trees, this could allow us to estimate which vectorization to choose based on the cost in the future.

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D57779/new/

https://reviews.llvm.org/D57779

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/X86/pr35497.ll
  llvm/test/Transforms/SLPVectorizer/X86/slp-throttle.ll

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