X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firedges.h;h=2d8a734e4e76fd2495c81944c9e914f34d9d64fb;hb=d904350bc3a4b3b9c77a71d683be6c44b041a33d;hp=90e618af3098cdd088954c0c836dab5f96f118cc;hpb=5b6df0f4d0b9d130dfddcb948b3df749f9d44903;p=libfirm

diff --git a/ir/ir/iredges.h b/ir/ir/iredges.h
index 90e618af3..2d8a734e4 100644
--- a/ir/ir/iredges.h
+++ b/ir/ir/iredges.h
@@ -1,3 +1,13 @@
+/*
+ * Project:     libFIRM
+ * File name:   ir/ir/iredges.h
+ * Purpose:     Public header for the automatically updating outs.
+ * Author:      Sebastian Hack
+ * Created:     3.2.2005
+ * CVS-ID:      $Id$
+ * Copyright:   (c) 1998-2005 Universität Karlsruhe
+ * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
+ */
 
 /**
  * Public header for the automatically updating outs.
@@ -8,7 +18,7 @@
 #ifndef _FIRM_EDGES_H
 #define _FIRM_EDGES_H
 
-#include "irnode.h"
+#include "firm_types.h"
 
 #ifndef _IR_EDGE_TYPEDEF_
 #define _IR_EDGE_TYPEDEF_
@@ -40,13 +50,31 @@ const ir_edge_t *get_irn_out_edge_next(const ir_node *irn,
 
 /**
  * A convenience iteration macro over all out edges of a node.
- * @param irn The node.
- * @param edge An @c ir_edge_t pointer which shall be set to the current
+ * @param irn  The node.
+ * @param edge An ir_edge_t pointer which shall be set to the current
  * edge.
  */
 #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 ir_edge_t pointer which shall be set to the current
+ * edge.
+ * @param ne   The next edge, enables alteration safe edge 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.