[llvm] Handle GEPs with negative offset and 'nuw' attribute (PR #117147)

[Nikita Popov via llvm-commits]

nikic wrote:

@pkarveti Please check whether your code is clean under `-fsanitize=undefined`. If you want to use a negative index on an array, you need to do so using a signed index, not an unsigned one.

https://github.com/llvm/llvm-project/pull/117147