[llvm] ConstRange: exhaustively test makeExactICmpRegion (PR #127058)

[Yingwei Zheng via llvm-commits]

https://github.com/dtcxzyw approved this pull request.

Should we remove the assertion here?
https://github.com/llvm/llvm-project/blob/2db262886f0c06c079e1b2808c4c14c16f8861b5/llvm/lib/IR/ConstantRange.cpp#L166

Do you have a plan to test with samesign in follow-up patches?


https://github.com/llvm/llvm-project/pull/127058