X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=include%2Flibfirm%2Firloop.h;h=c7219b572146619f07ab56b9be0c8d081696714f;hb=fa9c992b5f23e7a059ac91fdd04b409b951ebcc4;hp=969ff77c64bdb1b78ee2815796664aa811dbc37d;hpb=1ce363f80e6a204d4011f85813362d9bd1d0e7e4;p=libfirm

diff --git a/include/libfirm/irloop.h b/include/libfirm/irloop.h
index 969ff77c6..c7219b572 100644
--- a/include/libfirm/irloop.h
+++ b/include/libfirm/irloop.h
@@ -67,8 +67,9 @@ void clear_backedges(ir_node *n);
 /** Loop elements: loop nodes and ir nodes */
 typedef union {
 	firm_kind *kind;    /**< is either k_ir_node or k_ir_loop */
-	ir_node *node;      /**< Pointer to an ir_node element */
-	ir_loop *son;       /**< Pointer to an ir_loop element */
+	ir_node  *node;     /**< Pointer to an ir_node element */
+	ir_loop  *son;      /**< Pointer to an ir_loop element */
+	ir_graph *irg;      /**< Pointer to an ir_graph element (only callgraph loop trees) */
 } loop_element;
 
 int      is_ir_loop(const void *thing);
@@ -165,31 +166,43 @@ int construct_backedges(ir_graph *irg);
 int construct_ip_backedges(void);
 #endif
 
-/** Construct loop tree only for control flow.
+/**
+ * Construct Intra-procedural control flow loop tree for a IR-graph.
+ *
+ * This constructs loop information resembling the program structure.
+ * It is useful for loop optimizations and analyses, as, e.g., finding
+ * iteration variables or loop invariant code motion.
  *
- *  This constructs loop information resembling the program structure.
- *  It is useful for loop optimizations and analyses, as, e.g., finding
- *  iteration variables or loop invariant code motion.
+ * This algorithm computes only back edge information for Block nodes, not
+ * for Phi nodes.
  *
- *  This algorithm computes only back edge information for Block nodes, not
- *  for Phi nodes.
+ * This algorithm destroyes the link field of block nodes.
  *
- *  This algorithm destroyes the link field of block nodes.
+ * @param irg  the graph
  *
  * @returns Maximal depth of loop tree.
  */
 int construct_cf_backedges(ir_graph *irg);
 
+/**
+ * Computes Intra-procedural control flow loop tree on demand.
+ *
+ * @param irg  the graph
+ */
+void assure_cf_loop(ir_graph *irg);
+
 #ifdef INTERPROCEDURAL_VIEW
-/** Construct interprocedural loop tree for control flow.
+/**
+ * Construct Inter-procedural control flow loop tree.
  *
- *  @see construct_cf_backedges() and construct_ip_backedges().
+ * @see construct_cf_backedges() and construct_ip_backedges().
  */
-int construct_ip_cf_backedges (void);
+int construct_ip_cf_backedges(void);
 #endif
 
-/** Removes all loop information.
- *  Resets all backedges.  Works for any construction algorithm.
+/**
+ * Removes all loop information.
+ * Resets all backedges.  Works for any construction algorithm.
  */
 void free_loop_information(ir_graph *irg);
 void free_all_loop_information (void);
@@ -206,6 +219,6 @@ void free_all_loop_information (void);
  *
  * Returns non-zero, if the node n is not changed in the loop block
  * belongs to or in inner loops of this block. */
-int is_loop_invariant(ir_node *n, ir_node *block);
+int is_loop_invariant(const ir_node *n, const ir_node *block);
 
 #endif