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Commit 90e121fb authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][AVX] SimplifyDemandedVectorElts - combine PERMPD(x) -> EXTRACTF128(X) 

If we only use the bottom lane, see if we can simplify this to extract_subvector - which is always at least as quick as PERMPD/PERMQ.

llvm-svn: 364518
parent 687d47c2
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