[llvm] [InstComb] Allow more user for (add (ptrtoint %B), %O) to GEP transform. (PR #153566)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

Rebased after landing https://github.com/llvm/llvm-project/pull/15342

ping :) 

https://github.com/llvm/llvm-project/pull/153566