[PATCH] D47681: [DAGCombiner] Bug 31275- Extract a shift from a constant mul or udiv if a rotate can be formed

[Roman Lebedev via Phabricator via llvm-commits]

lebedev.ri added a comment.

BTW, that reminds me.
@sameconrad while you are looking at rotates in backend, can you please also check (at least add tests,
if there aren't any yet) that backend properly handles the cases where `mul`/`div` were transformed into shifts?


https://reviews.llvm.org/D47681