[PATCH] D62024: [InstCombine] fold shuffles of insert_subvectors

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> This transform relies on expanding the shuffle of narrowed operands back to

I think that qualifies as its own category; you're basically saying that certain shuffles should be equivalent to certain other shuffles, which is sort of orthogonal to whether any particular shuffle is legal.


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  https://reviews.llvm.org/D62024/new/

https://reviews.llvm.org/D62024