[PATCH] D148806: [SLP]Fix the cost for the extractelements, used in several nodes.

[Alexey Bataev via Phabricator via llvm-commits]

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Currently the compiler calculates the compensation cost for the
extractelements, removed during vectorization. But if the extractelement
instruction is used in several nodes, we can calculate the compensation
for them several times.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D148806

Files:
  llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp
  llvm/test/Transforms/SLPVectorizer/X86/blending-shuffle-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/X86/blending-shuffle.ll
  llvm/test/Transforms/SLPVectorizer/X86/buildvector-float-and-extract-lane1.ll
  llvm/test/Transforms/SLPVectorizer/X86/extract-shuffle-inseltpoison.ll
  llvm/test/Transforms/SLPVectorizer/X86/extract-shuffle.ll

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