digraph JIT {

    block0 [label = "...\nsplit", shape=octagon]
    block0 -> block1 [label="False"]
    block0 -> block2 [label="True"]
    
    block1 [label = "...", shape=box]
    block2 [label = "...", shape=box]
    block3 [label = "merge\n...", shape=box]

    block1 -> block3;
    block2 -> block3;

}