[PATCH] D59710: [SLP] remove lower limit for forming reduction patterns

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 227972.
spatel added a comment.

Patch updated:
Carve out an exception for forming 2-way reductions by threading the minimum elements as a parameter from vectorizeChainsInBlock(). This is more restrictive than necessary (it doesn't get all of the motivating examples), but it does not introduce any obvious regressions either.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D59710/new/

https://reviews.llvm.org/D59710

Files:
  llvm/include/llvm/Transforms/Vectorize/SLPVectorizer.h
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Feature/weak_constant.ll
  llvm/test/Transforms/SLPVectorizer/X86/hadd.ll
  llvm/test/Transforms/SLPVectorizer/X86/reduction2.ll

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