1 digraph fence_sw_r_collpase2 {
5 N1 [label="A: fence(release)", shape=none];
6 N2 [style=invis, shape=point];
7 N3 [style=invis, shape=point];
8 N4 [label="B: load(acquire)", shape=none];
10 N1 -> N4 [label="sw", color=blue, penwidth=3, constraint=false];
11 N1 -> N2 [color=invis, weight=100];
12 N3 -> N4 [color=invis, weight=100];