[llvm] [LLVM][IR] When evaluating GEP offsets don't assume ConstantInt is a scalar. (PR #117162)

[Nikita Popov via llvm-commits]

https://github.com/nikic approved this pull request.

LGTM. We probably *should* support vectors here in the future, but that's going to have fallout, so this is fine for now...

https://github.com/llvm/llvm-project/pull/117162