1C SB+poonceonces
2
3(*
4 * Result: Sometimes
5 *
6 * This litmus test demonstrates that at least some ordering is required
7 * to order the store-buffering pattern, where each process writes to the
8 * variable that the preceding process reads.
9 *)
10
11{
12	int x;
13	int y;
14}
15
16P0(int *x, int *y)
17{
18	int r0;
19
20	WRITE_ONCE(*x, 1);
21	r0 = READ_ONCE(*y);
22}
23
24P1(int *x, int *y)
25{
26	int r0;
27
28	WRITE_ONCE(*y, 1);
29	r0 = READ_ONCE(*x);
30}
31
32exists (0:r0=0 /\ 1:r0=0)
33