1C Z6.0+pooncelock+poonceLock+pombonce
2
3{}
4
5P0(int *x, int *y, spinlock_t *mylock)
6{
7	spin_lock(mylock);
8	WRITE_ONCE(*x, 1);
9	WRITE_ONCE(*y, 1);
10	spin_unlock(mylock);
11}
12
13P1(int *y, int *z, spinlock_t *mylock)
14{
15	int r0;
16
17	spin_lock(mylock);
18	smp_mb__after_spinlock();
19	r0 = READ_ONCE(*y);
20	WRITE_ONCE(*z, 1);
21	spin_unlock(mylock);
22}
23
24P2(int *x, int *z)
25{
26	int r1;
27
28	WRITE_ONCE(*z, 2);
29	smp_mb();
30	r1 = READ_ONCE(*x);
31}
32
33exists (1:r0=1 /\ z=2 /\ 2:r1=0)
34