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// Copyright 2012-2015 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.
// Issue #2303
#![feature(intrinsics)]
use std::mem;
mod rusti {
extern "rust-intrinsic" {
pub fn pref_align_of<T>() -> usize;
pub fn min_align_of<T>() -> usize;
}
}
// This is the type with the questionable alignment
#[derive(Debug)]
struct Inner {
c64: u32
}
// This is the type that contains the type with the
// questionable alignment, for testing
#[derive(Debug)]
struct Outer {
c8: u8,
t: Inner
}
#[cfg(any(target_arch = "x86", target_arch = "arm", target_arch = "aarch64"))]
mod m {
pub fn align() -> usize { 4 }
pub fn size() -> usize { 8 }
}
#[cfg(target_arch = "x86_64")]
mod m {
pub fn align() -> usize { 4 }
pub fn size() -> usize { 8 }
}
pub fn main() {
unsafe {
let x = Outer {c8: 22, t: Inner {c64: 44}};
// Send it through the shape code
let y = format!("{:?}", x);
println!("align inner = {:?}", rusti::min_align_of::<Inner>());
println!("size outer = {:?}", mem::size_of::<Outer>());
println!("y = {:?}", y);
// per clang/gcc the alignment of `inner` is 4 on x86.
assert_eq!(rusti::min_align_of::<Inner>(), m::align());
// per clang/gcc the size of `outer` should be 12
// because `inner`s alignment was 4.
assert_eq!(mem::size_of::<Outer>(), m::size());
assert_eq!(y, "Outer { c8: 22, t: Inner { c64: 44 } }".to_string());
}
}
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