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
25 #ifndef FIRM_ANA_CDEP_H
26 #define FIRM_ANA_CDEP_H
28 #include "firm_types.h"
32 * @defgroup ir_cdep Control Dependence
36 /** Computes the control dependence graph for a graph. */
37 FIRM_API void compute_cdep(ir_graph *irg);
39 /** Frees the control dependence info. */
40 FIRM_API void free_cdep(ir_graph *irg);
42 /** Returns control dependent block */
43 FIRM_API ir_node *get_cdep_node(const ir_cdep *cdep);
45 /** Returns next entry in a list of cdeps */
46 FIRM_API ir_cdep *get_cdep_next(const ir_cdep *cdep);
49 * Returns a list of all control dependences of a block.
51 FIRM_API ir_cdep *find_cdep(const ir_node *block);
54 * Replaces the control dependence info of old by the info of nw.
56 FIRM_API void exchange_cdep(ir_node *old, const ir_node *nw);
59 * Checks whether dependee is (directly) control dependent on candidate.
61 * @param dependee the (possible) dependent block
62 * @param candidate the (possible) block on which dependee is dependent
64 FIRM_API int is_cdep_on(const ir_node *dependee, const ir_node *candidate);
67 * If block is control dependent on exactly one node, returns this node,
70 * @param block the block to check
72 FIRM_API ir_node *get_unique_cdep(const ir_node *block);
75 * Checks if the given block is control dependent of more than one node.
77 * @param block the block to check
79 FIRM_API int has_multiple_cdep(const ir_node *block);