[PATCH] D40215: [X86][AVX512] Use PACKSS/PACKUS for vXi16->vXi8 truncations without BWI.

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a reviewer: pcordes.
RKSimon added a comment.

This patch came about as possible tweak prior to  adding support AVX512BW PACKUS/PACKSS for PR34871, which was concerned about port5 load from double the number of truncations. But yes register limits is likely to be an issue. I still need to finish PR34773 first though so will come back to this in a while.


Repository:
  rL LLVM

https://reviews.llvm.org/D40215