re PR middle-end/56461 (GCC is leaking lots of memory)

	PR middle-end/56461
	* tree-ssa-loop-ivcanon.c (tree_estimate_loop_size): Release path
	vector even when returning true.  Fix up function comment formatting.

From-SVN: r196398

gcc/ChangeLog

 2013-03-01  Jakub Jelinek  <jakub@redhat.com>
 
 	PR middle-end/56461
+	* tree-ssa-loop-ivcanon.c (tree_estimate_loop_size): Release path
+	vector even when returning true.  Fix up function comment formatting.
+
+	PR middle-end/56461
 	* ira-build.c (ira_loop_nodes_count): New variable.
 	(create_loop_tree_nodes): Initialize it.
 	(finish_loop_tree_nodes): Use it instead of looking at current_loops.

gcc/tree-ssa-loop-ivcanon.c

@@ -207,7 +207,7 @@ constant_after_peeling (tree op, gimple stmt, struct loop *loop)
    EDGE_TO_CANCEL (if non-NULL) is an non-exit edge eliminated in the last iteration
    of loop.
    Return results in SIZE, estimate benefits for complete unrolling exiting by EXIT. 
-   Stop estimating after UPPER_BOUND is met. Return true in this case */
+   Stop estimating after UPPER_BOUND is met.  Return true in this case.  */
 
 static bool
 tree_estimate_loop_size (struct loop *loop, edge exit, edge edge_to_cancel, struct loop_size *size,
@@ -321,6 +321,7 @@ tree_estimate_loop_size (struct loop *loop, edge exit, edge edge_to_cancel, stru
 	      - size->last_iteration_eliminated_by_peeling) > upper_bound)
 	    {
               free (body);
+	      path.release ();
 	      return true;
 	    }
 	}