C C-LB+ldref-o+o-o+o-dep-o.litmus

{
	a=x0;
	c=y0;
	1:r2=b;
}

P0(int **a)
{
	int *r1;

	r1 = READ_ONCE(*a);
	WRITE_ONCE(*r1, 1);
}

P1(int *b, int **c)
{
	int r1;

	r1 = READ_ONCE(*b);
	WRITE_ONCE(*c, r2);
}

P2(int **a, int **c)
{
	int *r1;

	r1 = READ_ONCE(*c);
	WRITE_ONCE(*a, r1);
}

exists
(0:r1=b /\ 1:r1=1 /\ 2:r1=b)