Simon Pilgrim 8d84aa2cce [X86][AVX1] Improve 256-bit vector costs for integer unary intrinsics.
Account for subvector extraction/insertion, helps prevent the vectorizers from selecting 256-bit vectors that will have to be split anyhow on AVX1 targets. 

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@302378 91177308-0d34-0410-b5e6-96231b3b80d8
2017-05-07 20:58:55 +00:00
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