+ * Activates data and block edges for an irg.
+ * If the irg phase is phase_backend, Dependence edges are
+ * additionally activated.
+ *
+ * @param irg The graph to activate the edges for.
+ */
+void edges_activate(ir_graph *irg);
+
+/**
+ * Deactivate data and block edges for an irg.
+ * If the irg phase is phase_backend, Dependence edges are
+ * additionally deactivated.
+ * @param irg The graph.