[llvm] [InstCombine] Compare `icmp inttoptr, inttoptr` values directly (PR #107012)

[Nikita Popov via llvm-commits]

nikic wrote:

I think the open question here is:

> My last attempt #77832 broke hwasan buildbot. @vitalybuka Can you check this patch?

But maybe we can just land this and see what happens.

https://github.com/llvm/llvm-project/pull/107012