mirror of https://github.com/rust-lang/rust
23 lines
532 B
Rust
23 lines
532 B
Rust
//@ compile-flags: -O
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//@ run-pass
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#![allow(unused_must_use)]
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// Makes sure that zero-initializing large types is reasonably fast,
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// Doing it incorrectly causes massive slowdown in LLVM during
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// optimisation.
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//@ pretty-expanded FIXME #23616
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//@ needs-threads
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#![feature(intrinsics)]
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use std::{mem, thread};
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const SIZE: usize = 1024 * 1024;
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fn main() {
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// do the test in a new thread to avoid (spurious?) stack overflows
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thread::spawn(|| {
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let _memory: [u8; SIZE] = unsafe { mem::zeroed() };
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}).join();
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}
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