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Unverified Commit c6e894b9 authored by Roman Lebedev's avatar Roman Lebedev
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[X86][Costmodel] `getReplicationShuffleCost()`: implement cost model for 16... 

[X86][Costmodel] `getReplicationShuffleCost()`: implement cost model for 16 bit-wide elements with AVX512BW

BWI introduced VPERMW, so cost-model i16 replication shuffle using it.
Note that we can still model i16 replication shufflle without BWI,
by promoting to i32. That will be done in follow-ups.

Reviewed By: RKSimon

Differential Revision: https://reviews.llvm.org/D113478
parent 4101c7bf
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