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Commit d3bb036b authored by Craig Topper's avatar Craig Topper
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[X86] Add some cost model entries for sext/zext for avx512bw 

This fixes some of scalarization costs reported for sext/zext using avx512bw. This does not fix all scalarization costs being reported. Just the worst.

I've restricted this only to combinations of types that are legal with avx512bw like v32i1/v64i1/v32i16/v64i8 and conversions between vXi1 and vXi8/vXi16 with legal vXi8/vXi16 result types.

Differential Revision: https://reviews.llvm.org/D54979

llvm-svn: 347785
parent f3b6f583
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