[llvm] [ValueTracking] Handle recursive select/PHI in ComputeKnownBits (PR #114689)

[Nikita Popov via llvm-commits]

https://github.com/nikic commented:

I don't fully understand the recursion limit handling here, both in the old and the new code. Why is it safe to use the full depth for the select case? Can't you have multiple phi incoming values that are all selects and perform a full-depth walk on all of them?

https://github.com/llvm/llvm-project/pull/114689