+#![feature(core_intrinsics)] // for `volatile_set_memory`
+
#[repr(C)]
#[derive(Copy, Clone)]
struct Foo {
assert_eq!(w[idx].b, 0xcdcdcdcdcdcdcdcd);
assert_eq!(w[idx].c, 0xcdcdcdcdcdcdcdcd);
}
+
+ // -----
+ // `std::intrinsics::volatile_set_memory` should behave identically
+
+ let mut v: [u64; LENGTH] = [0; LENGTH];
+
+ for idx in 0..LENGTH {
+ assert_eq!(v[idx], 0);
+ }
+
+ unsafe {
+ let p = v.as_mut_ptr();
+ ::std::intrinsics::volatile_set_memory(p, 0xab, LENGTH);
+ }
+
+ for idx in 0..LENGTH {
+ assert_eq!(v[idx], 0xabababababababab);
+ }
+
+ // -----
+
+ let mut w: [Foo; LENGTH] = [Foo { a: 0, b: 0, c: 0 }; LENGTH];
+ for idx in 0..LENGTH {
+ assert_eq!(w[idx].a, 0);
+ assert_eq!(w[idx].b, 0);
+ assert_eq!(w[idx].c, 0);
+ }
+
+ unsafe {
+ let p = w.as_mut_ptr();
+ ::std::intrinsics::volatile_set_memory(p, 0xcd, LENGTH);
+ }
+
+ for idx in 0..LENGTH {
+ assert_eq!(w[idx].a, 0xcdcdcdcdcdcdcdcd);
+ assert_eq!(w[idx].b, 0xcdcdcdcdcdcdcdcd);
+ assert_eq!(w[idx].c, 0xcdcdcdcdcdcdcdcd);
+ }
}