def map_input(fu: AGraph, subgraphs: Dict[str, AGraph],
simplified_dfg: AGraph) -> Tuple[Dict[str, int], int]:
label = fu.graph_attr['label'].strip()
preds = simplified_dfg.predecessors(label)
tmp = []
for pred in preds:
pred_label = pred.attr['label'].strip()
if pred_label != label:
tmp.append(pred.attr['label'])
tmp.sort()
out = {}
i = 0
for string in tmp:
for node in subgraphs[string].nodes():
out[node.get_name()] = i
i += 1
return out, i
