libfirm/irloop.h

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/*
 * Copyright (C) 1995-2011 University of Karlsruhe.  All right reserved.
 *
 * This file is part of libFirm.
 *
 * This file may be distributed and/or modified under the terms of the
 * GNU General Public License version 2 as published by the Free Software
 * Foundation and appearing in the file LICENSE.GPL included in the
 * packaging of this file.
 *
 * Licensees holding valid libFirm Professional Edition licenses may use
 * this file in accordance with the libFirm Commercial License.
 * Agreement provided with the Software.
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE.
 */

#ifndef FIRM_ANA_IRLOOP_H
#define FIRM_ANA_IRLOOP_H

#include "firm_types.h"
#include "firm_common.h"
#include "begin.h"

FIRM_API int is_backedge(const ir_node *n, int pos);
FIRM_API void set_backedge(ir_node *n, int pos);
FIRM_API void set_not_backedge(ir_node *n, int pos);
FIRM_API int has_backedges(const ir_node *n);
FIRM_API void clear_backedges(ir_node *n);

typedef union {
    firm_kind *kind; 
    ir_node  *node;  
    ir_loop  *son;   
    ir_graph *irg;   
} loop_element;

FIRM_API int is_ir_loop(const void *thing);

FIRM_API void set_irg_loop(ir_graph *irg, ir_loop *l);

FIRM_API ir_loop *get_irg_loop(const ir_graph *irg);

FIRM_API ir_loop *get_irn_loop(const ir_node *n);

FIRM_API ir_loop *get_loop_outer_loop(const ir_loop *loop);
FIRM_API unsigned get_loop_depth(const ir_loop *loop);

FIRM_API size_t get_loop_n_elements(const ir_loop *loop);

FIRM_API loop_element get_loop_element(const ir_loop *loop, size_t pos);

FIRM_API long get_loop_loop_nr(const ir_loop *loop);

FIRM_API void set_loop_link(ir_loop *loop, void *link);
FIRM_API void *get_loop_link(const ir_loop *loop);

FIRM_API int construct_backedges(ir_graph *irg);

FIRM_API int construct_cf_backedges(ir_graph *irg);

FIRM_API void assure_loopinfo(ir_graph *irg);

FIRM_API void free_loop_information(ir_graph *irg);
FIRM_API void free_all_loop_information(void);

FIRM_API int is_loop_invariant(const ir_node *n, const ir_node *block);

#include "end.h"

#endif