[PATCH] D143787: [X86] Add new pass `X86FixupInstTuning` for fixing up machine-instruction selection.

[Noah Goldstein via Phabricator via llvm-commits]

goldstein.w.n added a comment.

In D143787#4151630 <https://reviews.llvm.org/D143787#4151630>, @RKSimon wrote:

> someting I just noticed - please can you ensure you have AVX1 test coverage for the VPERMILPSmi/VPERMILPSYmi cases - we can't fold the VPERMILPSYmi case to the VPSHUDYmi which requires AVX2

I'll add tests similar to what we have for .unpckpd


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  https://reviews.llvm.org/D143787/new/

https://reviews.llvm.org/D143787