[llvm] [SCEVAA] Allowing to subtract two inttoptrs with different pointer bases (PR #91453)

[Nikita Popov via llvm-commits]

https://github.com/nikic requested changes to this pull request.

I *really* do not want SCEV to start implicitly looking through inttoptr casts in any form. It's a rabbit hole of unclear semantics that I am happy to keep out of SCEV.

https://github.com/llvm/llvm-project/pull/91453