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   /**-------------------------------------------------------------------**
    **                              CLooG                                **
    **-------------------------------------------------------------------**
    **                             loop.h                                **
    **-------------------------------------------------------------------**
    **                 First version: october 26th 2001                  **
    **-------------------------------------------------------------------**/


/******************************************************************************
 *               CLooG : the Chunky Loop Generator (experimental)             *
 ******************************************************************************
 *                                                                            *
 * Copyright (C) 2001-2005 Cedric Bastoul                                     *
 *                                                                            *
 * This library is free software; you can redistribute it and/or              *
 * modify it under the terms of the GNU Lesser General Public                 *
 * License as published by the Free Software Foundation; either               *
 * version 2.1 of the License, or (at your option) any later version.         *
 *                                                                            *
 * This library is distributed in the hope that it will be useful,            *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of             *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU          *
 * Lesser General Public License for more details.                            *
 *                                                                            *
 * You should have received a copy of the GNU Lesser General Public           *
 * License along with this library; if not, write to the Free Software        *
 * Foundation, Inc., 51 Franklin Street, Fifth Floor,                         *
 * Boston, MA  02110-1301  USA                                                *
 *                                                                            *
 * CLooG, the Chunky Loop Generator                                           *
 * Written by Cedric Bastoul, Cedric.Bastoul@inria.fr                         *
 *                                                                            *
 ******************************************************************************/


#ifndef CLOOG_LOOP_H
#define CLOOG_LOOP_H
#if defined(__cplusplus)
extern "C" 
  {
#endif 

/**
 * CloogLoop structure:
 * this structure contains all the informations of a loop generated or to be
 * generated.
 * - if the loop has not been processed yet (it is not a result of a call to
 *   cloog_loop_generate), the domain is the whole iteration domain of a given
 *   block, the stride is 1 (i.e. there is no stride), block is necessarily not
 *   NULL and inner is NULL.
 * - if the loop comes as a result of a cloog_loop_generate call, the domain
 *   describes the constraints (guards and loop bounds) for only one dimension
 *   (the last one: outer dimensions being considered as parameters), the stride
 *   may differ from one (this means that on the considered dimension, a step of
 *   'stride' must be considered between integral point, the first integral
 *   point to be considered being the lower bound of the loop), inner may differ
 *   from NULL, meaning that there are further dimensions and nesting levels in
 *   the loop.
 */
struct cloogloop
{
  CloogState *state;          /**< State. */
  CloogDomain * domain ;      /**< The iteration domain. */
  CloogDomain *unsimplified;  /**< Unsimplified version of domain. */
  int otl;                    /**< Loop is executed at most once. */
  CloogStride *stride;        /**< If not NULL, stride information on iterator
                               *   (filled only after loop generation).
                               */
  CloogBlock * block ;        /**< The included statement block, NULL if none.*/
  void * usr;		      /**< User field, for library user convenience.
			       *   This pointer is not freed when the
			       *   CloogLoop structure is freed.
			       */
  struct cloogloop * inner ;  /**< Loops at the next level. */
  struct cloogloop * next ;   /**< Next loop at the same level. */
} ;
typedef struct cloogloop CloogLoop ;


/******************************************************************************
 *                          Structure display function                        *
 ******************************************************************************/
void cloog_loop_print_structure(FILE *, CloogLoop *, int) ;
void cloog_loop_print(FILE *, CloogLoop *) ;


/******************************************************************************
 *                         Memory deallocation function                       *
 ******************************************************************************/
void cloog_loop_free(CloogLoop *) ;


/******************************************************************************
 *                              Reading functions                             *
 ******************************************************************************/
CloogLoop *cloog_loop_from_domain(CloogState *state, CloogDomain *domain,
				  int number);
CloogLoop * cloog_loop_read(CloogState *state,
			    FILE * foo, int number, int nb_parameters);


/******************************************************************************
 *                            Processing functions                            *
 ******************************************************************************/
CloogLoop * cloog_loop_block(CloogLoop *loop, int *scaldims, int nb_scattdims);
CloogLoop * cloog_loop_malloc(CloogState *state);
CloogLoop *cloog_loop_generate(CloogLoop *loop, CloogDomain *context,
	int level, int scalar, int *scaldims, int nb_scattdims,
	CloogOptions *options);
CloogLoop *cloog_loop_simplify(CloogLoop *loop, CloogDomain *context, int level,
	int nb_scattdims, CloogOptions *options);
void cloog_loop_scatter(CloogLoop *, CloogScattering *);


#if defined(__cplusplus)
  }
#endif 
#endif /* define _H */