[PATCH] D27846: [SLP] Support for horizontal min/max reduction

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.
ABataev added reviewers: RKSimon, spatel, mkuper, mzolotukhin, hfinkel.
ABataev added a subscriber: llvm-commits.

SLP vectorizer supports horizontal reductions for Add/FAdd binary operations. Patch adds support for horizontal min/max reductions.
Function getReductionCost() is split to getArithmeticReductionCost() for binary operation reductions and getMinMaxReductionCost() for min/max reductions.
Patch fixes PR26956.


https://reviews.llvm.org/D27846

Files:
  include/llvm/Analysis/TargetTransformInfo.h
  include/llvm/Analysis/TargetTransformInfoImpl.h
  include/llvm/CodeGen/BasicTTIImpl.h
  include/llvm/Transforms/Vectorize/SLPVectorizer.h
  lib/Analysis/CostModel.cpp
  lib/Analysis/TargetTransformInfo.cpp
  lib/Target/X86/X86TargetTransformInfo.cpp
  lib/Target/X86/X86TargetTransformInfo.h
  lib/Transforms/Vectorize/SLPVectorizer.cpp
  test/Transforms/SLPVectorizer/X86/horizontal-list.ll
  test/Transforms/SLPVectorizer/X86/horizontal-minmax.ll

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