[llvm] [InstComb] Try to convert inttoptr (add (ptrtoint %B), %O) to GEP. (PR #153421)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

> BTW, the title is misleading. It works only if the provenance doesn't matter: https://alive2.llvm.org/ce/z/9GK5la

Hmm, `Try` should imply that it is not always possible. Do you have any suggestions on how to clarify the title?

https://github.com/llvm/llvm-project/pull/153421