-/**
- * Returns whether the specified graph alreadz contains an undirected
- * edge between the two passed nodes.
- * @param graph the graph to which containment both nodes @p n1 and
- * @p n2 belong.
- * @param n1 the one end of the edge to query the graph for.
- * @param n2 the other end of the edge.
- * @return TRUE if the graph contains an edge between @p n1 and @p n2,
- * otherwise FALSE.
- */
-int be_ifg_has_edge(const be_if_graph_t* graph, const be_if_node_t* n1, const be_if_node_t* n2);
+typedef struct nodes_iter_t {
+ const be_chordal_env_t *env;
+ struct obstack obst;
+ int n;
+ int curr;
+ ir_node **nodes;
+} nodes_iter_t;
+
+typedef struct neighbours_iter_t {
+ const be_chordal_env_t *env;
+ const ir_node *irn;
+ int valid;
+ ir_nodeset_t neighbours;
+ ir_nodeset_iterator_t iter;
+} neighbours_iter_t;
+
+typedef struct cliques_iter_t {
+ struct obstack ob;
+ const be_chordal_env_t *cenv;
+ ir_node **buf;
+ ir_node **blocks;
+ int n_blocks, blk;
+ struct list_head *bor;
+ pset *living;
+} cliques_iter_t;
+
+void be_ifg_free(be_ifg_t *ifg);
+int be_ifg_connected(const be_ifg_t *ifg, const ir_node *a,
+ const ir_node *b);
+ir_node *be_ifg_neighbours_begin(const be_ifg_t *ifg, neighbours_iter_t *iter,
+ const ir_node *irn);
+ir_node *be_ifg_neighbours_next(neighbours_iter_t *iter);
+void be_ifg_neighbours_break(neighbours_iter_t *iter);
+ir_node *be_ifg_nodes_begin(const be_ifg_t *ifg, nodes_iter_t *iter);
+ir_node *be_ifg_nodes_next(nodes_iter_t *iter);
+void be_ifg_nodes_break(nodes_iter_t *iter);
+int be_ifg_cliques_begin(const be_ifg_t *ifg, cliques_iter_t *iter,
+ ir_node **buf);
+int be_ifg_cliques_next(cliques_iter_t *iter);
+void be_ifg_cliques_break(cliques_iter_t *iter);
+int be_ifg_degree(const be_ifg_t *ifg, const ir_node *irn);
+
+#define be_ifg_foreach_neighbour(ifg, iter, irn, pos) \
+ for(pos = be_ifg_neighbours_begin(ifg, iter, irn); pos != NULL; pos = be_ifg_neighbours_next(iter))
+
+#define be_ifg_foreach_node(ifg, iter, pos) \
+ for(pos = be_ifg_nodes_begin(ifg, iter); pos != NULL; pos = be_ifg_nodes_next(iter))
+
+#define be_ifg_foreach_clique(ifg, iter, buf, count) \
+ for(*(count) = be_ifg_cliques_begin(ifg, iter, buf); \
+ *(count) != -1 ; \
+ *(count) = be_ifg_cliques_next(iter))
+
+typedef struct {
+ int n_nodes;
+ int n_edges;
+ int n_comps;
+} be_ifg_stat_t;