+/** Get next entry in a list of cdeps */
+FIRM_API ir_cdep *get_cdep_next(const ir_cdep *cdep);
+
+/**
+ * Return a list of all control dependences of a block.
+ */
+FIRM_API ir_cdep *find_cdep(const ir_node *block);
+
+/**
+ * Replace the control dependence info of old by the info of nw.
+ */
+FIRM_API void exchange_cdep(ir_node *old, const ir_node *nw);