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
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9 * packaging of this file.
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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"
33 * An entry in the control dependence list.
36 ir_node *node; /**< A node on which the current block is control dependent on. */
37 ir_cdep *next; /**< Link to the next one if any. */
40 /** Compute the control dependence graph for a graph. */
41 FIRM_API void compute_cdep(ir_graph *irg);
43 /** Free the control dependence info. */
44 FIRM_API void free_cdep(ir_graph *irg);
47 * Return a list of all control dependences of a block.
49 FIRM_API ir_cdep *find_cdep(const ir_node *block);
52 * Replace the control dependence info of old by the info of nw.
54 FIRM_API void exchange_cdep(ir_node *old, const ir_node *nw);
57 * Check whether dependee is (directly) control dependent on candidate.
59 * @param dependee the (possible) dependent block
60 * @param candidate the (possible) block on which dependee is dependent
62 FIRM_API int is_cdep_on(const ir_node *dependee, const ir_node *candidate);
65 * If block is control dependent on exactly one node, return this node,
68 * @param block the block to check
70 FIRM_API ir_node *get_unique_cdep(const ir_node *block);
73 * Check if the given block is control dependent of more than one node.
75 * @param block the block to check
77 FIRM_API int has_multiple_cdep(const ir_node *block);