[PATCH] D87912: [X86] Use shuffle to widen truncate of 128-bit and smaller vectors

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

I'm not convinced this should be necessary - although it does seem to show some missed opportunities in truncateVectorWithPACK because we bail if the destination vector size < 64 bits - fixing that would avoid many of ISD::TRUCATION cases in ReplaceNodeResults


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  https://reviews.llvm.org/D87912/new/

https://reviews.llvm.org/D87912