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Commit d990cd37 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][AVX512DQ] Enable v16i16 vector shifts to use an extend+shift+truncate pattern. 

Use the existing AVX2 v8i16 vector shift lowering for v16i16 on AVX512 targets (AVX512BW will have already have lowered with vpsravw).

Cost model updates to follow.

llvm-svn: 291445
parent f8538572
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