--- /dev/null
+digraph rr_mo {
+margin=0
+
+N1 [label="X: v.store(1)", shape=none];
+N2 [label="Y: v.store(2)", shape=none];
+N3 [label="A: v.load()", shape=none];
+N4 [label="B: v.load()", shape=none];
+
+N3 -> N4 [label="hb", color=blue];
+N1 -> N3 [label="rf", color=red, constraint=false];
+N2 -> N4 [label="rf", color=red, constraint=false];
+N1 -> N2 [color=invis];
+}