-/* Performs dead node elimination by copying the ir graph to a new obstack. */
-void dead_node_elemination(ir_graph *irg);
+/* Performs dead node elimination by copying the ir graph to a new obstack.
+ Further removes Bad predecesors from Blocks and the corresponding
+ inputs to Phi nodes.
+ Attention: the numbers assigned to nodes if the library is compiled for
+ development/debugging are not conserved by copying. */
+void dead_node_elimination(ir_graph *irg);