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Commit 7379a706 authored by Simon Pilgrim's avatar Simon Pilgrim
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[X86][AVX512BW] AVX512BW can sign-extend v32i8 to v32i16 for simpler v32i8 multiplies. 

Only pre-AVX512BW targets need to split v32i8 vectors.

llvm-svn: 264509
parent b549ab02
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