[llvm] [InstCombine] Add limit for expansion of gep chains (PR #147065)

[Nikita Popov via llvm-commits]

nikic wrote:

After github.com/llvm/llvm-project/pull/147263 this doesn't have all that much effect anymore, but it should at least avoid any pathological cases.

https://github.com/llvm/llvm-project/pull/147065