[PATCH] D74943: [GISel][KnownBits]{NFC} Add a cache mechanism to speed compile time

[Quentin Colombet via Phabricator via llvm-commits]

qcolombet added a comment.

> That's true (although you'd need a third vreg with no defs/uses to do it) but as you say there's no reason to do so.

That's my point. Even if there is no reason to do so, it is possible.
What I am saying is a mechanism that solely relies on registers not changing value is not bug free.


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https://reviews.llvm.org/D74943