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//@ run-pass
#![allow(stable_features)]
// write_volatile causes an LLVM assert with composite types
#![feature(volatile)]
use std::ptr::{read_volatile, write_volatile};
#[derive(Debug, Eq, PartialEq)]
struct A(u32);
#[derive(Debug, Eq, PartialEq)]
struct B(u64);
#[derive(Debug, Eq, PartialEq)]
struct C(u32, u32);
#[derive(Debug, Eq, PartialEq)]
struct D(u64, u64);
#[derive(Debug, Eq, PartialEq)]
struct E([u64; 32]);
fn main() {
unsafe {
let mut x: u32 = 0;
write_volatile(&mut x, 1);
assert_eq!(read_volatile(&x), 1);
assert_eq!(x, 1);
let mut x: u64 = 0;
write_volatile(&mut x, 1);
assert_eq!(read_volatile(&x), 1);
assert_eq!(x, 1);
let mut x = A(0);
write_volatile(&mut x, A(1));
assert_eq!(read_volatile(&x), A(1));
assert_eq!(x, A(1));
let mut x = B(0);
write_volatile(&mut x, B(1));
assert_eq!(read_volatile(&x), B(1));
assert_eq!(x, B(1));
let mut x = C(0, 0);
write_volatile(&mut x, C(1, 1));
assert_eq!(read_volatile(&x), C(1, 1));
assert_eq!(x, C(1, 1));
let mut x = D(0, 0);
write_volatile(&mut x, D(1, 1));
assert_eq!(read_volatile(&x), D(1, 1));
assert_eq!(x, D(1, 1));
let mut x = E([0; 32]);
write_volatile(&mut x, E([1; 32]));
assert_eq!(read_volatile(&x), E([1; 32]));
assert_eq!(x, E([1; 32]));
}
}
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