[PATCH] D60897: [SLP] Look-ahead operand reordering heuristic.

Mon Oct 21 11:05:25 PDT 2019

vporpo updated this revision to Diff 225923.
vporpo added a comment.

This fixes the issue reported by @Carrot. It updates getShallowScore() to better cope with extracts from consecutive locations of the same vector (see last lit test). @Carrot, if you have the time please verify that this patch no longer causes a regression. Thanks!

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D60897/new/

https://reviews.llvm.org/D60897

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/AArch64/transpose.ll
  llvm/test/Transforms/SLPVectorizer/X86/lookahead.ll

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