+/**
+ * returns a list of 'free' methods, i.e., the methods that can be called
+ * from external or via function pointers.
+ *
+ * Die Datenstrukturen für sel-Methoden (sel_methods) muß vor dem
+ * Aufruf von "get_free_methods" aufgebaut sein. Die (internen)
+ * SymConst(name)-Operationen müssen in passende SymConst(ent)-Operationen
+ * umgewandelt worden sein, d.h. SymConst-Operationen verweisen immer
+ * auf eine echt externe Methode.
+ */
+static ir_entity **get_free_methods(int *length)
+{
+ eset *free_set = eset_create();
+ int i;
+ ir_entity **arr;
+ ir_entity *ent;
+ ir_graph *irg;
+ ir_type *tp;
+
+ for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
+ irg = get_irp_irg(i);
+ ent = get_irg_entity(irg);
+ /* insert "external visible" methods. */
+ if (get_entity_visibility(ent) != visibility_local) {
+ eset_insert(free_set, ent);
+ }
+ /* insert "sticky" methods. */
+ if (get_entity_stickyness(ent) == stickyness_sticky) {
+ eset_insert(free_set, ent);
+ }
+
+ /* Find all method entities that gets "visible" trough this graphs,
+ * for instance because their address is stored. */
+ irg_walk_graph(irg, NULL, free_ana_walker, free_set);
+ }
+
+ /* insert all methods that are used in global variables initializers */
+ tp = get_glob_type();
+ for (i = get_class_n_members(tp) - 1; i >= 0; --i) {
+ ent = get_class_member(tp, i);
+ add_method_address(ent, free_set);
+ }
+ tp = get_tls_type();
+ for (i = get_struct_n_members(tp) - 1; i >= 0; --i) {
+ ent = get_struct_member(tp, i);
+ add_method_address(ent, free_set);
+ }
+
+ /* the main program is even then "free", if it's not external visible. */
+ irg = get_irp_main_irg();
+ if (irg != NULL)
+ eset_insert(free_set, get_irg_entity(irg));
+
+ /* Finally, transform the set into an array. */
+ *length = eset_count(free_set);
+ arr = xmalloc(sizeof(ir_entity *) * (*length));
+ for (i = 0, ent = eset_first(free_set); ent; ent = eset_next(free_set)) {
+ arr[i++] = ent;
+ }
+ eset_destroy(free_set);