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//@ run-pass
#![feature(core_intrinsics)]
use std::intrinsics::{ volatile_copy_memory, volatile_store, volatile_load,
volatile_copy_nonoverlapping_memory,
volatile_set_memory };
//
// This test ensures that volatile intrinsics can be specialised with
// zero-sized types and, in case of copy/set functions, can accept
// number of elements equal to zero.
//
fn main () {
let mut dst_pair = (1, 2);
let src_pair = (3, 4);
let mut dst_empty = ();
let src_empty = ();
const COUNT_0: usize = 0;
const COUNT_100: usize = 100;
unsafe {
volatile_copy_memory(&mut dst_pair, &dst_pair, COUNT_0);
volatile_copy_nonoverlapping_memory(&mut dst_pair, &src_pair, 0);
volatile_copy_memory(&mut dst_empty, &dst_empty, 100);
volatile_copy_nonoverlapping_memory(&mut dst_empty, &src_empty,
COUNT_100);
volatile_set_memory(&mut dst_empty, 0, COUNT_100);
volatile_set_memory(&mut dst_pair, 0, COUNT_0);
volatile_store(&mut dst_empty, ());
volatile_store(&mut dst_empty, src_empty);
volatile_load(&src_empty);
}
}
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