2 * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief control dependence analysis
23 * @author Christoph Mallon
26 #ifndef FIRM_ANA_CDEP_H
27 #define FIRM_ANA_CDEP_H
29 #include "firm_types.h"
32 /** Compute the control dependence graph for a graph. */
33 FIRM_API void compute_cdep(ir_graph *irg);
35 /** Free the control dependence info. */
36 FIRM_API void free_cdep(ir_graph *irg);
38 /** Return control dependent block */
39 FIRM_API ir_node *get_cdep_node(const ir_cdep *cdep);
41 /** Get next entry in a list of cdeps */
42 FIRM_API ir_cdep *get_cdep_next(const ir_cdep *cdep);
45 * Return a list of all control dependences of a block.
47 FIRM_API ir_cdep *find_cdep(const ir_node *block);
50 * Replace the control dependence info of old by the info of nw.
52 FIRM_API void exchange_cdep(ir_node *old, const ir_node *nw);
55 * Check whether dependee is (directly) control dependent on candidate.
57 * @param dependee the (possible) dependent block
58 * @param candidate the (possible) block on which dependee is dependent
60 FIRM_API int is_cdep_on(const ir_node *dependee, const ir_node *candidate);
63 * If block is control dependent on exactly one node, return this node,
66 * @param block the block to check
68 FIRM_API ir_node *get_unique_cdep(const ir_node *block);
71 * Check if the given block is control dependent of more than one node.
73 * @param block the block to check
75 FIRM_API int has_multiple_cdep(const ir_node *block);