1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
// 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]));
}
}
|
