[PATCH] D79078: [VectorCombine] Leave reduction operation to SLP

[JunMa via Phabricator via llvm-commits]

junparser created this revision.
junparser added reviewers: spatel, RKSimon, lebedev.ri, jgorbe.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

As title, we found that the transformation of vector-combine pass break reduction handle in SLP pass after https://reviews.llvm.org/D75689.  
This patch conservatively match reduction pattern and return true in isExtractExtractCheap

TestPlan: check-clang check-llvm


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D79078

Files:
  llvm/lib/Transforms/Vectorize/VectorCombine.cpp
  llvm/test/Transforms/VectorCombine/X86/extract-binop.ll

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