[llvm] [LLVM][IR] Add constant range support for floating-point types (PR #86483)

[Nikita Popov via llvm-commits]

================

----------------
nikic wrote:

We should also have exhaustive tests for classify at least (the correctness of the implementation is not obvious to me) and possibly also intersect/union.

https://github.com/llvm/llvm-project/pull/86483