[PATCH] D58703: [x86] convert anyext of pinsrb scalar op to subreg insert

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

Ping.

Thoughts on where this should go?

I tried a few experiments with promoting some 8-bit ops to 32-bit, but I don't see a way to do that in stages. I think what we should do is promote almost all of those to 32-bit (like we do for 16-bit) because there's very little upside in using 8-bit ops, but lots of downside (this would make our codegen more like gcc from what I can tell). But that change is going to expose lots of small regressions because we've come to expect the 8-bit patterns.


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https://reviews.llvm.org/D58703