[PATCH] D151916: [DAG] Peek through any trunc/zext when combining select into shifts.

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

Yes, we're going to need a KnownBits check to ensure we were truncating away known zero bits


Repository:
  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D151916/new/

https://reviews.llvm.org/D151916