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Commit 72f2d4e8 authored by Craig Topper's avatar Craig Topper
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[InstCombine][X86] Add DemandedElts support for 512-bit PMULDQ/PMULUDQ instructions 

PMULDQ/PMULUDQ vXi64 instructions only use the even numbered v2Xi32 input elements which SimplifyDemandedVectorElts should try and use.

This builds on r290554 which added supported for 128 and 256-bit.

llvm-svn: 290582
parent 16250457
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