-/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-* All rights reserved.
-*
-* Author: Boris Boesler
-*
-* 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.
-*/
+/*
+ * Project: libFIRM
+ * File name: ir/ir/irgwalk.h
+ * Purpose:
+ * Author: Boris Boesler
+ * Modified by: Goetz Lindenmaier
+ * Created:
+ * CVS-ID: $Id$
+ * Copyright: (c) 1999-2003 Universität Karlsruhe
+ * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ */
+
+
+/**
+ * @file irgwalk.h
+ *
+ * Traverse an ir graph.
+ *
+ * @author Boris Boesler
+ *
+ * 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.
+ */
-/* $Id$ */
# ifndef _IRGWALK_H_
# define _IRGWALK_H_
#ifndef _IRG_WALK_FUNC_TYPEDEF_
#define _IRG_WALK_FUNC_TYPEDEF_
/**
- * The type of a walk function.
+ * The type of a walk function. Does not use the link field.
*
* @param node - the node that is just visited
* @param env - an environment pointer passed by the walk functions
typedef void irg_walk_func(ir_node *node, void *env);
#endif
-/** Allocates some necessary datastructures. */
-void init_ip_walk(void);
-
-/** Frees some necessary datastructures. */
-void finish_ip_walk(void);
-
/**
* Walks over the ir graph.
*
- * @param node - the start node
- * @param pre - walker function, executed before the predecessor of a node are visited
- * @param post - walker function, executed after the predecessor of a node are visited
- * @param env - environment, passend to pre and post
- *
* 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.
+ * flag. Therefore current_ir_graph must be set before calling the walker.
+ * 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.
+ * pre and post functions. Does not use the link fields.
+ *
+ * @param node - the start node
+ * @param pre - walker function, executed before the predecessor of a node are visited
+ * @param post - walker function, executed after the predecessor of a node are visited
+ * @param env - environment, passed to pre and post
+ *
*/
void irg_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void *env);
* @param irg - the irg graph
* @param pre - walker function, executed before the predecessor of a node are visited
* @param post - walker function, executed after the predecessor of a node are visited
- * @param env - environment, passend to pre and post
+ * @param env - environment, passed to pre and post
*
* Like irg_walk(), but walks over all reachable nodes in the ir
* graph, starting at the end operation. During the walk current_ir_graph
- * is set to irg.
+ * is set to irg. Does not use the link field. If interprocedural_view
+ * is set, visits all reachable irgs.
*/
void irg_walk_graph(ir_graph *irg, irg_walk_func *pre, irg_walk_func *post, void *env);
*
* @param pre - walker function, executed before the predecessor of a node are visited
* @param post - walker function, executed after the predecessor of a node are visited
- * @param env - environment, passend to pre and post
+ * @param env - environment, passed to pre and post
*
* This function executes irg_walk(end, pre, post, env) for all irgraphs in irprog.
* Sets current_ir_graph properly for each walk. Conserves current
* current_ir_graph. In interprocedural view nodes can be visited several
- * times.
+ * times. Does not use the link field.
*/
void all_irg_walk(irg_walk_func *pre, irg_walk_func *post, void *env);
*
* @param pre - walker function, executed before the predecessor of a node are visited
* @param post - walker function, executed after the predecessor of a node are visited
- * @param env - environment, passend to pre and post
+ * @param env - environment, passed to pre and post
*
* This function walks all irgs in interprocedural view.
- * Visits each node only once.Sets current_ir_graph properly.
+ * Visits each node only once. Sets current_ir_graph properly. Does not use the link field.
*/
void cg_walk(irg_walk_func *pre, irg_walk_func *post, void *env);
-/**
- * Walks only over Block nodes in the graph.
+/** Walks only over Block nodes in the graph.
*
* @param node - the start node
* @param pre - walker function, executed before the predecessor of a node are visited
* @param post - walker function, executed after the predecessor of a node are visited
- * @param env - environment, passend to pre and post
+ * @param env - environment, passed to pre and post
*
* This function Walks only over Block nodes in the graph. Has it's own visited
* flag, so that it can be interleaved with the other walker.
* If a none block is passed, starts at the block this node belongs to.
- * If end is passed also visites kept alive blocks.
+ * If end is passed also visits kept alive blocks. Does not use the link field.
*/
void irg_block_walk(ir_node *node, irg_walk_func *pre, irg_walk_func *post, void *env);
* @param irg - the irg graph
* @param pre - walker function, executed before the predecessor of a node are visited
* @param post - walker function, executed after the predecessor of a node are visited
- * @param env - environment, passend to pre and post
+ * @param env - environment, passed to pre and post
*
* Like irg_block_walk(), but walks over all reachable blocks in the
- * ir graph, starting at the end block.
+ * ir graph, starting at the end block. Does not use the link field.
*/
void irg_block_walk_graph(ir_graph *irg, irg_walk_func *pre, irg_walk_func *post, void *env);
*
* @param pre - walker function, executed before the predecessor of a node are visited
* @param post - walker function, executed after the predecessor of a node are visited
- * @param env - environment, passend to pre and post
+ * @param env - environment, passed to pre and post
*
* This function walks over all code in const_code_irg.
- * Uses visited flag in const_code_irg.
+ * Uses visited flag in const_code_irg. Does not use the link field.
*/
void walk_const_code(irg_walk_func *pre, irg_walk_func *post, void *env);
+/**
+ * Walks over reachable nodes in block-wise order, i.e. visit all nodes in a block
+ * before going to another block, starting at the end operation.
+ * Executes pre before visiting the predecessor of a node, post after.
+ * irg_walk_blkwise_graph() 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. Does not use the link fields.
+ * Walks only intraprocedural, even in interprocedural view.
+ *
+ * @param irg - the irg graph
+ * @param pre - walker function, executed before the predecessor of a node are visited
+ * @param post - walker function, executed after the predecessor of a node are visited
+ * @param env - environment, passed to pre and post
+ */
+void irg_walk_blkwise_graph(ir_graph *irg, irg_walk_func *pre, irg_walk_func *post, void *env);
+
# endif /* _IRGWALK_H_ */
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