source/statement.c

   1
   2    /**-------------------------------------------------------------------**
   3     **                              CLooG                                **
   4     **-------------------------------------------------------------------**
   5     **                           statement.c                             **
   6     **-------------------------------------------------------------------**
   7     **                 First version: november 4th 2001                  **
   8     **-------------------------------------------------------------------**/
   9
  10
  11 /******************************************************************************
  12  *               CLooG : the Chunky Loop Generator (experimental)             *
  13  ******************************************************************************
  14  *                                                                            *
  15  * Copyright (C) 2001-2005 Cedric Bastoul                                     *
  16  *                                                                            *
  17  * This is free software; you can redistribute it and/or modify it under the  *
  18  * terms of the GNU General Public License as published by the Free Software  *
  19  * Foundation; either version 2 of the License, or (at your option) any later *
  20  * version.                                                                   *
  21  *                                                                            *
  22  * This software is distributed in the hope that it will be useful, but       *
  23  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
  24  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License   *
  25  * for more details.                                                          *
  26  *                                                                            *
  27  * You should have received a copy of the GNU General Public License along    *
  28  * with software; if not, write to the Free Software Foundation, Inc.,        *
  29  * 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA                     *
  30  *                                                                            *
  31  * CLooG, the Chunky Loop Generator                                           *
  32  * Written by Cedric Bastoul, Cedric.Bastoul@inria.fr                         *
  33  *                                                                            *
  34  ******************************************************************************/
  35 /* CAUTION: the english used for comments is probably the worst you ever read,
  36  *          please feel free to correct and improve it !
  37  */
  38
  39 # include <stdlib.h>
  40 # include <stdio.h>
  41 # include <string.h>
  42 # include "../include/cloog/cloog.h"
  43
  44
  45 /******************************************************************************
  46  *                             Memory leaks hunting                           *
  47  ******************************************************************************/
  48
  49
  50 /**
  51  * These functions and global variables are devoted to memory leaks hunting: we
  52  * want to know at each moment how many CloogStatement structures had been
  53  * allocated (cloog_statement_allocated) and how many had been freed
  54  * (cloog_statement_freed). Each time a CloogStatement structure is allocated,
  55  * a call to the function cloog_statement_leak_up() must be carried out, and
  56  * respectively cloog_statement_leak_down() when a CloogStatement structure is
  57  * freed. The special variable cloog_statement_max gives the maximal number of
  58  * CloogStatement structures simultaneously alive (i.e. allocated and
  59  * non-freed) in memory.
  60  * - July 3rd->11th 2003: first version (memory leaks hunt and correction).
  61  */
  62
  63
  64 int cloog_statement_allocated = 0 ;
  65 int cloog_statement_freed = 0 ;
  66 int cloog_statement_max = 0 ;
  67
  68
  69 static void cloog_statement_leak_up()
  70 { cloog_statement_allocated ++ ;
  71   if ((cloog_statement_allocated-cloog_statement_freed) > cloog_statement_max)
  72   cloog_statement_max = cloog_statement_allocated - cloog_statement_freed ;
  73 }
  74
  75
  76 static void cloog_statement_leak_down()
  77 { cloog_statement_freed ++ ;
  78 }
  79
  80
  81 /******************************************************************************
  82  *                          Structure display function                        *
  83  ******************************************************************************/
  84
  85
  86 /**
  87  * cloog_domain_print_structure :
  88  * this function is a human-friendly way to display the CloogDomain data
  89  * structure, it includes an indentation level (level) in order to work with
  90  * others print_structure functions.
  91  * - June  16th 2005: first version.
  92  */
  93 void cloog_statement_print_structure(file, statement, level)
  94 FILE * file ;
  95 CloogStatement * statement ;
  96 int level ;
  97 { int i ;
  98
  99   if (statement != NULL)
 100   { /* Go to the right level. */
 101     for (i=0; i<level; i++)
 102     fprintf(file,"|\t") ;
 103     fprintf(file,"+-- CloogStatement %d \n",statement->number) ;
 104
 105     statement = statement->next ;
 106
 107     while (statement != NULL)
 108     { for (i=0; i<level; i++)
 109       fprintf(file,"|\t") ;
 110       fprintf(file,"|          |\n");
 111       for (i=0; i<level; i++)
 112       fprintf(file,"|\t") ;
 113       fprintf(file,"|          V\n");
 114
 115       for (i=0; i<level; i++)
 116       fprintf(file,"|\t") ;
 117       fprintf(file,"|   CloogStatement %d \n",statement->number) ;
 118       statement = statement->next ;
 119     }
 120   }
 121   else
 122   { for (i=0; i<level; i++)
 123     fprintf(file,"|\t") ;
 124
 125     fprintf(file,"+-- No CloogStatement\n") ;
 126   }
 127 }
 128
 129
 130 /**
 131  * cloog_statement_print function:
 132  * This function prints the content of a CloogStatement structure (statement)
 133  * into a file (file, possibly stdout).
 134  */
 135 void cloog_statement_print(FILE * file, CloogStatement * statement)
 136 { cloog_statement_print_structure(file,statement,0) ;
 137 }
 138
 139
 140 /******************************************************************************
 141  *                         Memory deallocation function                       *
 142  ******************************************************************************/
 143
 144
 145 /**
 146  * cloog_statement_free function:
 147  * This function frees the allocated memory for a CloogStatement structure.
 148  */
 149 void cloog_statement_free(CloogStatement * statement)
 150 { CloogStatement * next ;
 151
 152   while (statement != NULL)
 153   { cloog_statement_leak_down() ;
 154
 155     next = statement->next ;
 156     /* free(statement->usr) ; Actually, this is user's job ! */
 157     free(statement) ;
 158     statement = next ;
 159   }
 160 }
 161
 162
 163 /******************************************************************************
 164  *                            Processing functions                            *
 165  ******************************************************************************/
 166
 167
 168 /**
 169  * cloog_statement_malloc function:
 170  * This function allocates the memory space for a CloogStatement structure and
 171  * sets its fields with default values. Then it returns a pointer to the
 172  * allocated space.
 173  * - November 21th 2005: first version.
 174  */
 175 CloogStatement * cloog_statement_malloc()
 176 { CloogStatement * statement ;
 177
 178   /* Memory allocation for the CloogStatement structure. */
 179   statement = (CloogStatement *)malloc(sizeof(CloogStatement)) ;
 180   if (statement == NULL)
 181     cloog_die("memory overflow.\n");
 182   cloog_statement_leak_up() ;
 183
 184   /* We set the various fields with default values. */
 185   statement->number = 0;
 186   statement->usr  = NULL ; /* To fill it is actually user's job ! */
 187   statement->next = NULL ;
 188
 189   return statement ;
 190 }
 191
 192
 193 /**
 194  * cloog_statement_alloc function:
 195  * This function allocates the memory space for a CloogStatement structure and
 196  * sets its fields with those given as input. Then it returns a pointer to the
 197  * allocated space.
 198  * - number is the statement number.
 199  **
 200  * - September 9th 2002: first version.
 201  * - March    17th 2003: fix for the usr field in CloogStatement structure.
 202  * - April    16th 2005: adaptation to new CloogStatement structure (with
 203  *                       number), cloog_statement_read becomes
 204  *                       cloog_statement_alloc sincethere is nothing more to
 205  *                       read on a file.
 206  * - November 21th 2005: use of cloog_statement_malloc.
 207  */
 208 CloogStatement * cloog_statement_alloc(int number)
 209 { CloogStatement * statement ;
 210
 211   /* Memory allocation and initialization of the structure. */
 212   statement = cloog_statement_malloc() ;
 213
 214   statement->number = number ;
 215
 216   return statement ;
 217 }
 218
 219
 220 /**
 221  * cloog_statement_copy function:
 222  * This function returns a copy of the CloogStatement structure given as input.
 223  * - October 28th 2001: first version (in loop.c).
 224  * - March   17th 2003: fix for the usr field in CloogStatement structure.
 225  * - April   16th 2005: adaptation to new CloogStatement struct (with number).
 226  */
 227 CloogStatement * cloog_statement_copy(CloogStatement * source)
 228 { CloogStatement * statement, * temp, * now = NULL ;
 229
 230   statement = NULL ;
 231
 232   while (source != NULL)
 233   { cloog_statement_leak_up() ;
 234
 235     temp = (CloogStatement *)malloc(sizeof(CloogStatement)) ;
 236     if (temp == NULL)
 237       cloog_die("memory overflow.\n");
 238
 239     temp->number = source->number ;
 240     temp->usr    = source->usr ;
 241     temp->next   = NULL ;
 242
 243     if (statement == NULL)
 244     { statement = temp ;
 245       now = statement ;
 246     }
 247     else
 248     { now->next = temp ;
 249       now = now->next ;
 250     }
 251     source = source->next ;
 252   }
 253   return(statement) ;
 254 }
 255
 256
 257 /**
 258  * cloog_statement_add function:
 259  * This function adds a CloogStatement structure (statement) at a given place
 260  * (now) of a NULL terminated list of CloogStatement structures. The beginning
 261  * of this list is (start). This function updates (now) to (loop), and
 262  * updates (start) if the added element is the first one -that is when (start)
 263  * is NULL-.
 264  * - March 27th 2004: first version.
 265  */
 266 void cloog_statement_add(start, now, statement)
 267 CloogStatement ** start, ** now, * statement ;
 268 { if (*start == NULL)
 269   { *start = statement ;
 270     *now = *start ;
 271   }
 272   else
 273   { (*now)->next = statement ;
 274     *now = (*now)->next ;
 275   }
 276 }
 277