+ *
+ * This optimizations read the irg_const_function property of
+ * entities and and sets the irg_const_function property of
+ * graphs.
+ *
+ * If callee information is valid, we also optimize polymorphic Calls.
+ *
+ * @param force_run if set, an optimization run is startet even
+ * if no const function graph was detected.
+ * Else calls are only optimized if at least one
+ * const function graph was detected.
+ *
+ * If the fontend created external entities with irg_const_function
+ * property set, the force_run parameter should be set, else
+ * should be unset.
+ *
+ * @note This optimization destroys the link fields of nodes.