[PATCH] D46957: [x86] Lower some trunc + shuffle patterns to vpmov[q|d][b|w]

[Gabor Buella via Phabricator via llvm-commits]

GBuella added a comment.

I think some more work needs to be done here, to also match the masked versions of these, e.g.
`_mm256_mask_cvtepi64_epi16` -> `vpmovdb %ymm0, %xmm0, {k1}`


https://reviews.llvm.org/D46957