[llvm] [InstCombine] Preserve nuw in canonicalizeGEPOfConstGEPI8() (PR #151533)

[Nikita Popov via llvm-commits]

nikic wrote:

> Hm, I should also preserve inbounds if nuw is preserved: https://alive2.llvm.org/ce/z/ByUR5Z

Done.

https://github.com/llvm/llvm-project/pull/151533