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