2e612f8d86
1) We can always bound the maximum with the numerator.
- https://alive2.llvm.org/ce/z/PqHvuT
2) Even if denominator min can be zero, we can still bound the minimum
result with `lhs.umin u/ rhs.umax`.
This is similar to https://github.com/llvm/llvm-project/pull/110169