[PATCH] D142271: [ValueTracking] Add KnownBits patterns `xor(x, x - 1)` and `and(x, -x)` for knowing upper bits to be zero

[Noah Goldstein via Phabricator via llvm-commits]

goldstein.w.n added a comment.

In D142271#4136983 <https://reviews.llvm.org/D142271#4136983>, @nikic wrote:

> Any reason not to commit the first three patches in this stack yet?

I generally like to keep series together, but not strong reason.

Are the following 3 problematic?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D142271/new/

https://reviews.llvm.org/D142271