[llvm] [VPlan/PatternMatch] Fix m_GetElementPtr (NFC) (PR #158019)

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

I am a bit confused by the title; does it fix an issue or is NFC? Should it say something like cover additiona GEP-like recipes in m_GetElementPtr?

Do you plan to use this in a follow-up patch? Just wondering what the best way is to test this

https://github.com/llvm/llvm-project/pull/158019