mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-24 22:44:26 +00:00
25 lines
724 B
Rust
25 lines
724 B
Rust
// run-pass
|
|
// ignore-emscripten FIXME(#45351)
|
|
|
|
#![feature(repr_simd, test)]
|
|
|
|
extern crate test;
|
|
|
|
#[repr(simd)]
|
|
pub struct Mu64(pub u64, pub u64, pub u64, pub u64);
|
|
|
|
fn main() {
|
|
// This ensures an unaligned pointer even in optimized builds, though LLVM
|
|
// gets enough type information to actually not mess things up in that case,
|
|
// but at the time of writing this, it's enough to trigger the bug in
|
|
// non-optimized builds
|
|
unsafe {
|
|
let memory = &mut [0u64; 8] as *mut _ as *mut u8;
|
|
let misaligned_ptr: &mut [u8; 32] = {
|
|
std::mem::transmute(memory.offset(1))
|
|
};
|
|
*misaligned_ptr = std::mem::transmute(Mu64(1, 1, 1, 1));
|
|
test::black_box(memory);
|
|
}
|
|
}
|