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[InstCombine][X86][AVX] Add DemandedElts support for VPERMILPD/VPERMILPSā€¦

Description

[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.

Details

Committed
RKSimonJan 17 2017, 3:35 AM
Parents
rL292208: Update the release tester for MIPS. NFC.
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