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Commit d4eb800b authored by Simon Pilgrim's avatar Simon Pilgrim
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[InstCombine][X86][AVX] Add DemandedElts support for VPERMILPD/VPERMILPS instructions 

Simplify a vpermilvar shuffle mask based on the elements of the mask that are actually demanded.

llvm-svn: 292209
parent 92b37531
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