65 lines
1.8 KiB
Rust
65 lines
1.8 KiB
Rust
// Copyright 2016 The Rust Project Developers. See the COPYRIGHT
|
|
// file at the top-level directory of this distribution and at
|
|
// http://rust-lang.org/COPYRIGHT.
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
|
|
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
|
|
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
|
|
// option. This file may not be copied, modified, or distributed
|
|
// except according to those terms.
|
|
|
|
// 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]));
|
|
}
|
|
}
|