mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-05 05:04:24 +00:00
57 lines
1.4 KiB
Rust
57 lines
1.4 KiB
Rust
// 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]));
|
|
}
|
|
}
|