[PATCH] D54392: [DAGCombiner] look through bitcasts when trying to narrow vector binops

Simon Pilgrim via Phabricator via llvm-commits llvm-commits at lists.llvm.org
Mon Nov 12 03:53:17 PST 2018

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RKSimon added a reviewer: andreadb.
RKSimon added a comment.

The X86 code looks reasonable to me - not sure how far the rabbit hole we want to go with 'free vs cheap' - especially as 'cheap' can be so relative, it'll quickly end up needing a cost model......


https://reviews.llvm.org/D54392

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