Weird node placement of dot graph - graphviz

Question

I have the following source code for a graph in dot:
digraph name {
rankdir="LR";
node [shape="record"];
1 [label="OUTPUT"];
A [label="FWD|<i>i|<r_in>r_in|<r_out>r_out|<o>o"];
B [label="FIFO|<r_in>r_in|<o>o"];
C [label="Cons|<i>i|<r_out>r_out|<o>o"];
A:o:e -> C:i:w;
C:r_out:w -> A:r_in:e;
B:o:e -> A:i:w;
C:o:e -> 1:w;
A:r_out:w -> B:r_in:e;
}
It consists of 4 nodes, which essentially could be placed one after another, in the order B -> A -> C -> OUTPUT. If dot would place the nodes in this order, only few edge would cross between two nodes.
However, calling dot like this:
dot mygraph.dot -Tpng -o mygraph.png
creates the following mess:
Edit: It seems, the order of the nodes in the source is important. However, as the source is generated from a program, outputting its internal signal flow structure, I cannot rely on it to put the nodes in the right order. I thought, dot and its graph layout engine can figure out on its own, which nodes are the first ones, such that the wires do not cross.

Answer 1

Just define the nodes in the desired order:
digraph name {
rankdir="LR";
node [shape="record"];
B [label="FIFO|<r_in>r_in|<o>o"];
A [label="FWD|<i>i|<r_in>r_in|<r_out>r_out|<o>o"];
C [label="Cons|<i>i|<r_out>r_out|<o>o"];
1 [label="OUTPUT"];
A:o:e -> C:i:w;
C:r_out:w -> A:r_in:e;
B:o:e -> A:i:w;
C:o:e -> 1:w;
A:r_out:w -> B:r_in:e;
}
yields