[llvm] [ConstraintElim] Add min/max bounds from KnownBits (PR #176607)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

Interesting. Would be good to check the impact on compile-time. decompose may be called on the same operands multiple times, so we me end up computing knownBits multiple times for the same value

https://github.com/llvm/llvm-project/pull/176607