linux-brain/tools/memory-model/litmus-tests/Z6.0+pooncerelease+poacquir...

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C Z6.0+pooncerelease+poacquirerelease+mbonceonce
{}
P0(int *x, int *y)
{
WRITE_ONCE(*x, 1);
smp_store_release(y, 1);
}
P1(int *y, int *z)
{
int r0;
r0 = smp_load_acquire(y);
smp_store_release(z, 1);
}
P2(int *x, int *z)
{
int r1;
WRITE_ONCE(*z, 2);
smp_mb();
r1 = READ_ONCE(*x);
}
exists (1:r0=1 /\ z=2 /\ 2:r1=0)