[PATCH] D38697: [SLP] Fix for PR32086: Count InsertElementInstr of the same elements as shuffle.

[Alexey Bataev via Phabricator via llvm-commits]

ABataev created this revision.

If the same value is going to be vectorized several times in the same
tree entry, this entry is considered to be a gather entry and cost of
this gather is counter as cost of InsertElementInstrs for each gathered
value. But we can consider these elements as ShuffleInstr with
SK_PermuteSingle shuffle kind.


https://reviews.llvm.org/D38697

Files:
  lib/Transforms/Vectorize/SLPVectorizer.cpp
  test/Transforms/SLPVectorizer/X86/PR32086.ll
  test/Transforms/SLPVectorizer/X86/blending-shuffle.ll

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