[llvm] [ValueTracking] Compute knownbits for `(and/or cond0, cond1)` on both sides of branch (PR #82818)

[Nikita Popov via llvm-commits]

nikic wrote:

@dtcxzyw Can you please rerun the tests?

@goldsteinn What's the compile-time impact?

https://github.com/llvm/llvm-project/pull/82818