If the gep is nusw (usually via inbounds) and the offset is non-negative, we can infer nuw. Proof: https://alive2.llvm.org/ce/z/ihztLy
Similar to other targets (AMDGPU, Mips, PowerPC, RISCV, X86, ...) `ninja check-clang-codegen-aarch64` can be used to test this subfolder. Pull Request: https://github.com/llvm/llvm-project/pull/115818