gcc/testsuite/rust/execute/arith-offset.rs

#![feature(no_core, intrinsics, lang_items)]
#![no_core]

#[lang = "sized"]
pub trait Sized {}

extern "rust-intrinsic" {
    fn arith_offset<T>(dst: *const T, offset: isize) -> *const T;
}

fn main() -> i32 {
    let base_addr: usize = 0;
    let ptr = base_addr as *const u64;

    unsafe {
        let wrap_ptr = arith_offset(ptr, -1);
        if wrap_ptr as isize == -8_isize {
            0 
        } else {
            1 
        }
    }
}