X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firedges.h;h=23c7a5d93ab18760f5ee98f453563371f849d890;hb=371fc078efd77a80022e8ac43bcc00a96c201d4e;hp=169b47fd0400ff29d6403ae4c1bba560f48c83a0;hpb=90bc14d87d97b760110e65fd2e5a8e84eddb7ae5;p=libfirm

diff --git a/ir/ir/iredges.h b/ir/ir/iredges.h
index 169b47fd0..23c7a5d93 100644
--- a/ir/ir/iredges.h
+++ b/ir/ir/iredges.h
@@ -15,6 +15,11 @@
 typedef struct _ir_edge_t ir_edge_t;
 #endif
 
+#ifndef _IR_BLOCK_EDGE_TYPEDEF_
+#define _IR_BLOCK_EDGE_TYPEDEF_
+typedef struct _ir_block_edge_t ir_block_edge_t;
+#endif
+
 /**
  * Get the first edge pointing to some node.
  * @note There is no order on out edges. First in this context only
@@ -42,6 +47,32 @@ const ir_edge_t *get_irn_out_edge_next(const ir_node *irn,
 #define foreach_out_edge(irn,edge) \
 	for(edge = get_irn_out_edge_first(irn); edge; edge = get_irn_out_edge_next(irn, edge))
 
+/**
+ * A convenience iteration macro over all out edges of a node, which is safe
+ * against alteration of the current edge.
+ * @param irn The node.
+ * @param edge An @c ir_edge_t pointer which shall be set to the current
+ * edge.
+ * @param ne The next edge, enables alteration safe erge processing.
+ */
+#define foreach_out_edge_safe(irn,edge,ne) \
+	for( \
+		(edge) = (get_irn_out_edge_first(irn)), \
+			(ne) = ((edge) ? (get_irn_out_edge_next(irn, edge)) : NULL); \
+		edge; \
+		(edge) = (ne), (ne) = ((edge) ? (get_irn_out_edge_next(irn, edge)) : NULL) \
+	)
+
+
+/**
+ * A convenience iteration macro for all control flow edges
+ * leaving a block, and thus are cf successor edges.
+ * @param bl The block.
+ * @param edge An @c ir_edge_t pointer which is set to the current edge.
+ */
+#define foreach_block_succ(bl,edge) \
+	for(edge = get_block_succ_first(bl); edge; edge = get_block_succ_next(bl, edge))
+
 /*
  * Get the source node of an edge.
  * @param edge The edge.
@@ -49,18 +80,47 @@ const ir_edge_t *get_irn_out_edge_next(const ir_node *irn,
  */
 ir_node *get_edge_src_irn(const ir_edge_t *edge);
 
+/**
+ * Get the number of edges pointing to a node.
+ * @param irn The node.
+ * @return The number of edges pointing to this node.
+ */
+int get_irn_n_edges(const ir_node *irn);
+
 /**
  * Get the position of an edge.
- * @param edge.
+ * @param edge The edge.
  * @return The position in the in array of that edges source.
  */
 extern int get_edge_src_pos(const ir_edge_t *edge);
 
+/**
+ * Get the edge object of an outgoing edge at a node.
+ * @param   irg The graph, the node is in.
+ * @param   irn The node at which the edge originates.
+ * @param   pos The position of the edge.
+ * @return      The corresponding edge object or NULL,
+ *              if no such edge exists.
+ */
+const ir_edge_t *get_irn_edge(ir_graph *irg, const ir_node *irn, int pos);
+
+/**
+ * Check, if the out edges are activated.
+ * @param irg The graph.
+ * @return 1, if the edges are present for the given irg, 0 if not.
+ */
 extern int edges_activated(const ir_graph *irg);
 
+/**
+ * Activate the edges for an irg.
+ * @param irg The graph to activate the edges for.
+ **/
 extern void edges_activate(ir_graph *irg);
 
+/**
+ * Deactivate the edges for an irg.
+ * @param irg The graph.
+ */
 extern void edges_deactivate(ir_graph *irg);
 
-
 #endif /* _FIRM_EDGES_H */