| // run-pass |
| |
| #![allow(unused_must_use)] |
| // Makes sure that zero-initializing large types is reasonably fast, |
| // Doing it incorrectly causes massive slowdown in LLVM during |
| // optimisation. |
| |
| // pretty-expanded FIXME #23616 |
| // ignore-emscripten no threads support |
| |
| #![feature(intrinsics)] |
| |
| use std::thread; |
| |
| extern "rust-intrinsic" { |
| pub fn init<T>() -> T; |
| } |
| |
| const SIZE: usize = 1024 * 1024; |
| |
| fn main() { |
| // do the test in a new thread to avoid (spurious?) stack overflows |
| thread::spawn(|| { |
| let _memory: [u8; SIZE] = unsafe { init() }; |
| }).join(); |
| } |