[PATCH] D74539: [KnownBits] Avoid copying KnownBits objects

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

In D74539#1874000 <https://reviews.llvm.org/D74539#1874000>, @RKSimon wrote:

> Are you actually seeing a performance delta from this?


No, I was just doing it as a kind of drive-by clean-up, since @bjope expressed some concern that we might be copying these objects too much in comments on D74482 <https://reviews.llvm.org/D74482>.


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