-/* 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_
# include "irnode.h"
/* type of callback function for ir_graph walk */
-typedef void (* irg_walk_func)(ir_node *, void *);
-
-/* 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, irg_walk_func pre, irg_walk_func post, void *env);
-
-/* Like "irg_walk", but walks over all reachable nodes in the ir
+#ifndef _IRG_WALK_FUNC_TYPEDEF_
+#define _IRG_WALK_FUNC_TYPEDEF_
+/**
+ * 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
+
+/**
+ * Walks over the ir graph.
+ *
+ * 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. 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. 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);
+
+/**
+ * Walks over all reachable nodes in the ir graph.
+ *
+ * @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
+ *
+ * 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. */
-void irg_walk_graph(ir_graph *irg, irg_walk_func pre, irg_walk_func post, void *env);
-
-/* 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. */
-void all_irg_walk(irg_walk_func pre, irg_walk_func post, void *env);
-
-
-/* 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. */
-void irg_block_walk(ir_node *node, irg_walk_func pre, irg_walk_func post, void *env);
-
-/* Like "irg_block_walk", but walks over all reachable blocks in the
- * ir graph, starting at the end block. */
-void irg_block_walk_graph(ir_graph *irg, irg_walk_func pre, irg_walk_func post, void *env);
-
-/********************************************************************/
-/** Walking support for interprocedural analysis **/
-/** **/
-/** @@@ Don't use, not operational yet, doesn't grok recursions!! **/
-/** **/
-/** Interprocedural walking should not walk all predecessors of **/
-/** all nodes. When leaving a procedure the walker should only **/
-/** follow the edge corresponding to the most recent entry of the **/
-/** procedure. The following functions use an internal stack to **/
-/** remember the current call site of a procedure. **/
-/** They also set current_ir_graph correctly. **/
-/** **/
-/** Usage example: **/
-/** **/
-/** void init_ip_walk (); **/
-/** work_on_graph(some_end_node); **/
-/** void finish_ip_walk(); **/
-/** **/
-/** work_on_graph(ir_node *n) { **/
-/** for (i = 0; i < get_irn_arity(n); i++) { **/
-/** if (...) continue; **/
-/** ir_node *m = get_irn_ip_pred(n, i); **/
-/** if !m continue; **/
-/** work_on_graph(m); **/
-/** return_recur(n, i); **/
-/** } **/
-/** } **/
-/********************************************************************/
-
-/* Allocates some necessary datastructures. */
-void init_ip_walk ();
-/* Frees some necessary datastructures. */
-void finish_ip_walk();
-
-/* Call for i in {0|-1 ... get_irn_arity(n)}.
- If n is a conventional node returns the same node as get_irn_n(n, i).
- If the predecessors of n are in the callee of the procedure n belongs
- to, returns get_irn_n(n, i) if this node is in the callee on the top
- of the stack, else returns NULL.
- If the predecessors of n are in a procedure called by the procedure n
- belongs to pushes the caller on the caller stack in the callee.
- Sets current_ir_graph to the graph the node returned is in. */
-ir_node *get_irn_ip_pred(ir_node *n, int pos);
-
-/* If get_irn_ip_pred() returned a node (not NULL) this must be
- called to clear up the stacks.
- Sets current_ir_graph to the graph n is in. */
-void return_recur(ir_node *n, int pos);
-
+ * 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);
+
+/**
+ * Executes irg_walk(end, pre, post, env) for all irgraphs in irprog.
+ *
+ * @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
+ *
+ * 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. Does not use the link field.
+ */
+void all_irg_walk(irg_walk_func *pre, irg_walk_func *post, void *env);
+
+/**
+ * Walks all irgs in interprocedural view.
+ *
+ * @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
+ *
+ * This function walks all irgs in interprocedural view.
+ * 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.
+ *
+ * @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
+ *
+ * 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 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);
+
+/**
+ * Walks only over reachable Block nodes in the graph.
+ *
+ * @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
+ *
+ * Like irg_block_walk(), but walks over all reachable blocks in the
+ * 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);
+
+/**
+ * Walks over all code in const_code_irg.
+ *
+ * @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
+ *
+ * This function walks over all code 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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