X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Fir%2Firgwalk.h;h=fcf691bd156c6b79538eaffafce9e22979ed7ebe;hb=169fd803ea2ed08171113c1fd7ab4e528e1ebc26;hp=7dab7856c7d1410d8f616dbc340935aaa6328cef;hpb=55fadbd9a8b631825b8abdcb185f53c5f0cdd1a7;p=libfirm diff --git a/ir/ir/irgwalk.h b/ir/ir/irgwalk.h index 7dab7856c..fcf691bd1 100644 --- a/ir/ir/irgwalk.h +++ b/ir/ir/irgwalk.h @@ -1,34 +1,166 @@ -/* 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 -*/ +/* + * 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. + */ + # ifndef _IRGWALK_H_ # define _IRGWALK_H_ # 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. */ -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 - 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*), - void *env); +/* type of callback function for ir_graph walk */ +#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. 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_ */