+/**
+ * Check, if the value of a node cannot represent a NULL pointer.
+ *
+ * - If sel_based_null_check_elim is enabled, all
+ * Sel nodes can be skipped.
+ * - A SymConst(entity) is NEVER a NULL pointer
+ * - Confirms are evaluated
+ *
+ * @param n a node representing the value
+ */
+int value_not_null(ir_node *n);
+