X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firgwalk.h;h=e856a8db7dbbe08eb2fdec2089bf1f788d421db5;hb=5f8ddee6b08c8040c0a304a347d65045c1141d52;hp=61096d1286064b4676a86f72b9d035315bd3038c;hpb=efbeaff549fcc6015da255ed4d453a95937ff0fd;p=libfirm

diff --git a/ir/ir/irgwalk.h b/ir/ir/irgwalk.h
index 61096d128..e856a8db7 100644
--- a/ir/ir/irgwalk.h
+++ b/ir/ir/irgwalk.h
@@ -6,6 +6,9 @@
 ** traverse an ir graph
 ** - execute the pre function before recursion
 ** - execute the post function after recursion
+**
+** Uses current_ir_graph (from irgraph.h)!!! Set it to the proper
+** graph before starting the walker.
 */
 
 
@@ -15,11 +18,18 @@
 
 # include "irnode.h"
 
+/* Walks over the ir graph, starting at the node given as first argument.
+   Executes pre before visiting the predecessor of a node, post after.
+   irg_walk uses the visited flag in irg and the nodes to determine visited
+   nodes.  It executes inc_irg_visited(current_ir_graph) to generate a new
+   flag.  It marks the node as visited before executing pre.
+   The void* env can be used to pass status information between the
+   pre and post functions.  */
 void irg_walk(ir_node *node,
 	      void (pre)(ir_node*, void*), void (post)(ir_node*, void*),
 	      void *env);
 
-/* walks only over Block nodes in the graph.  Has it's own visited
+/* Walks only over Block nodes in the graph.  Has it's own visited
    flag, so that it can be interleaved with the other walker.         */
 void irg_block_walk(ir_node *node,
 		    void (pre)(ir_node*, void*), void (post)(ir_node*, void*),