1
2    /*+-----------------------------------------------------------------**
3     **                       OpenScop Library                          **
4     **-----------------------------------------------------------------**
5     **                          statement.c                            **
6     **-----------------------------------------------------------------**
7     **                   First version: 30/04/2008                     **
8     **-----------------------------------------------------------------**
9
10
11 *****************************************************************************
12 * OpenScop: Structures and formats for polyhedral tools to talk together    *
13 *****************************************************************************
14 *    ,___,,_,__,,__,,__,,__,,_,__,,_,__,,__,,___,_,__,,_,__,                *
15 *    /   / /  //  //  //  // /   / /  //  //   / /  // /  /|,_,             *
16 *   /   / /  //  //  //  // /   / /  //  //   / /  // /  / / /\             *
17 *  |~~~|~|~~~|~~~|~~~|~~~|~|~~~|~|~~~|~~~|~~~|~|~~~|~|~~~|/_/  \            *
18 *  | G |C| P | = | L | P |=| = |C| = | = | = |=| = |=| C |\  \ /\           *
19 *  | R |l| o | = | e | l |=| = |a| = | = | = |=| = |=| L | \# \ /\          *
20 *  | A |a| l | = | t | u |=| = |n| = | = | = |=| = |=| o | |\# \  \         *
21 *  | P |n| l | = | s | t |=| = |d| = | = | = | |   |=| o | | \# \  \        *
22 *  | H | | y |   | e | o | | = |l|   |   | = | |   | | G | |  \  \  \       *
23 *  | I | |   |   | e |   | |   | |   |   |   | |   | |   | |   \  \  \      *
24 *  | T | |   |   |   |   | |   | |   |   |   | |   | |   | |    \  \  \     *
25 *  | E | |   |   |   |   | |   | |   |   |   | |   | |   | |     \  \  \    *
26 *  | * |*| * | * | * | * |*| * |*| * | * | * |*| * |*| * | /      \* \  \   *
27 *  | O |p| e | n | S | c |o| p |-| L | i | b |r| a |r| y |/        \  \ /   *
28 *  '---'-'---'---'---'---'-'---'-'---'---'---'-'---'-'---'          '--'    *
29 *                                                                           *
30 * Copyright (C) 2008 University Paris-Sud 11 and INRIA                      *
31 *                                                                           *
32 * (3-clause BSD license)                                                    *
33 * Redistribution and use in source  and binary forms, with or without       *
34 * modification, are permitted provided that the following conditions        *
35 * are met:                                                                  *
36 *                                                                           *
37 * 1. Redistributions of source code must retain the above copyright notice, *
38 *    this list of conditions and the following disclaimer.                  *
39 * 2. Redistributions in binary form must reproduce the above copyright      *
40 *    notice, this list of conditions and the following disclaimer in the    *
41 *    documentation and/or other materials provided with the distribution.   *
42 * 3. The name of the author may not be used to endorse or promote products  *
43 *    derived from this software without specific prior written permission.  *
44 *                                                                           *
45 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR      *
46 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES *
47 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.   *
48 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,          *
49 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT  *
50 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, *
51 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY     *
52 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT       *
53 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF  *
54 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.         *
55 *                                                                           *
56 * OpenScop Library, a library to manipulate OpenScop formats and data       *
57 * structures. Written by:                                                   *
58 * Cedric Bastoul     <Cedric.Bastoul@u-psud.fr> and                         *
59 * Louis-Noel Pouchet <Louis-Noel.pouchet@inria.fr>                          *
60 *                                                                           *
61 *****************************************************************************/
62
63
64#include <stdlib.h>
65#include <stdio.h>
66#include <string.h>
67#include <ctype.h>
68
69#include <osl/macros.h>
70#include <osl/util.h>
71#include <osl/strings.h>
72#include <osl/body.h>
73#include <osl/relation.h>
74#include <osl/relation_list.h>
75#include <osl/names.h>
76#include <osl/interface.h>
77#include <osl/generic.h>
78#include <osl/statement.h>
79
80
81/*+***************************************************************************
82 *                         Structure display functions                       *
83 *****************************************************************************/
84
85
86/**
87 * osl_statement_idump function:
88 * this function displays an osl_statement_t structure (*statement) into
89 * a file (file, possibly stdout) in a way that trends to be understandable.
90 * It includes an indentation level (level) in order to work with others
91 * dumping functions.
92 * \param[in] file      File where the information has to be printed.
93 * \param[in] statement The statement whose information has to be printed.
94 * \param[in] level     Number of spaces before printing, for each line.
95 */
96void osl_statement_idump(FILE * file, osl_statement_p statement, int level) {
97  int j, first = 1, number = 1;
98
99  // Go to the right level.
100  for (j = 0; j < level; j++)
101    fprintf(file, "|\t");
102
103  if (statement != NULL)
104    fprintf(file, "+-- osl_statement_t (S%d)\n", number);
105  else
106    fprintf(file, "+-- NULL statement\n");
107
108  while (statement != NULL) {
109    if (!first) {
110      // Go to the right level.
111      for (j = 0; j < level; j++)
112        fprintf(file, "|\t");
113      fprintf(file, "|   osl_statement_t (S%d)\n", number);
114    }
115    else
116      first = 0;
117
118    // A blank line.
119    for (j = 0; j <= level + 1; j++)
120      fprintf(file, "|\t");
121    fprintf(file, "\n");
122
123    // Print the domain of the statement.
124    osl_relation_idump(file, statement->domain, level + 1);
125
126    // Print the scattering of the statement.
127    osl_relation_idump(file, statement->scattering, level + 1);
128
129    // Print the array access information of the statement.
130    osl_relation_list_idump(file, statement->access, level + 1);
131
132    // Print the original body expression.
133    osl_generic_idump(file, statement->body, level + 1);
134
135    statement = statement->next;
136    number++;
137
138    // Next line.
139    if (statement != NULL) {
140      for (j = 0; j <= level; j++)
141        fprintf(file, "|\t");
142      fprintf(file, "V\n");
143    }
144  }
145
146  // The last line.
147  for (j = 0; j <= level; j++)
148    fprintf(file, "|\t");
149  fprintf(file, "\n");
150}
151
152
153/**
154 * osl_statement_dump function:
155 * this function prints the content of an osl_statement_t structure
156 * (*statement) into  a file (file, possibly stdout).
157 * \param[in] file      The file where the information has to be printed.
158 * \param[in] statement The statement whose information has to be printed.
159 */
160void osl_statement_dump(FILE * file, osl_statement_p statement) {
161  osl_statement_idump(file, statement, 0);
162}
163
164
165/**
166 * osl_statement_names function:
167 * this function generates as set of names for all the dimensions
168 * involved in a given statement.
169 * \param[in] statement The statement (list) we have to generate names for.
170 * \return A set of generated names for the input statement dimensions.
171 */
172static
173osl_names_p osl_statement_names(osl_statement_p statement) {
174  int nb_parameters = OSL_UNDEFINED;
175  int nb_iterators  = OSL_UNDEFINED;
176  int nb_scattdims  = OSL_UNDEFINED;
177  int nb_localdims  = OSL_UNDEFINED;
178  int array_id      = OSL_UNDEFINED;
179
180  osl_statement_get_attributes(statement, &nb_parameters, &nb_iterators,
181                               &nb_scattdims,  &nb_localdims, &array_id);
182
183  return osl_names_generate("P", nb_parameters,
184                            "i", nb_iterators,
185                            "c", nb_scattdims,
186                            "l", nb_localdims,
187                            "A", array_id);
188}
189
190
191/**
192 * osl_statement_pprint function:
193 * this function pretty-prints the content of an osl_statement_t structure
194 * (*statement) into a file (file, possibly stdout) in the OpenScop format.
195 * \param[in] file      The file where the information has to be printed.
196 * \param[in] statement The statement whose information has to be printed.
197 * \param[in] names     The names of the constraint columns for comments.
198 */
199void osl_statement_pprint(FILE * file, osl_statement_p statement,
200                          osl_names_p names) {
201  int nb_relations, number = 1;
202  int generated_names = 0;
203  int iterators_backedup = 0;
204  osl_strings_p iterators_backup = NULL;
205
206  // Generate the dimension names if necessary and replace iterators with
207  // statement iterators if possible.
208  if (names == NULL) {
209    generated_names = 1;
210    names = osl_statement_names(statement);
211  }
212
213  while (statement != NULL) {
214    // If possible, replace iterator names with statement iterator names.
215    if (osl_generic_has_URI(statement->body, OSL_URI_BODY) &&
216        (((osl_body_p)(statement->body->data))->iterators != NULL)) {
217      iterators_backedup = 1;
218      iterators_backup = names->iterators;
219      names->iterators = ((osl_body_p)(statement->body->data))->iterators;
220    }
221
222    nb_relations = 0;
223
224    fprintf(file, "# =============================================== ");
225    fprintf(file, "Statement %d\n", number);
226
227    fprintf(file, "# Number of relations describing the statement:\n");
228
229    if (statement->domain != NULL)
230      nb_relations ++;
231    if (statement->scattering != NULL)
232      nb_relations ++;
233    nb_relations += osl_relation_list_count(statement->access);
234
235    fprintf(file, "%d\n\n", nb_relations);
236
237    fprintf(file, "# ---------------------------------------------- ");
238    fprintf(file, "%2d.1 Domain\n", number);
239    osl_relation_pprint(file, statement->domain, names);
240    fprintf(file, "\n");
241
242    fprintf(file, "# ---------------------------------------------- ");
243    fprintf(file, "%2d.2 Scattering\n", number);
244    osl_relation_pprint(file, statement->scattering, names);
245    fprintf(file, "\n");
246
247    fprintf(file, "# ---------------------------------------------- ");
248    fprintf(file, "%2d.3 Access\n", number);
249    osl_relation_list_pprint_elts(file, statement->access, names);
250    fprintf(file, "\n");
251
252    fprintf(file, "# ---------------------------------------------- ");
253    fprintf(file, "%2d.4 Body\n", number);
254    if (statement->body != NULL) {
255      fprintf(file, "# Statement body is provided\n");
256      fprintf(file, "1\n");
257      osl_generic_print(file, statement->body);
258    }
259    else {
260      fprintf(file, "# Statement body is not provided\n");
261      fprintf(file, "0\n");
262    }
263
264    fprintf(file, "\n");
265
266    // If necessary, switch back iterator names.
267    if (iterators_backedup) {
268      iterators_backedup = 0;
269      names->iterators = iterators_backup;
270    }
271
272    statement = statement->next;
273    number++;
274  }
275
276  if (generated_names)
277    osl_names_free(names);
278}
279
280
281/**
282 * osl_statement_print function:
283 * this function prints the content of an osl_statement_t structure
284 * (*statement) into a file (file, possibly stdout) in the OpenScop format.
285 * \param[in] file      The file where the information has to be printed.
286 * \param[in] statement The statement whose information has to be printed.
287 */
288void osl_statement_print(FILE * file, osl_statement_p statement) {
289
290  osl_statement_pprint(file, statement, NULL);
291}
292
293
294/*****************************************************************************
295 *                               Reading function                            *
296 *****************************************************************************/
297
298
299/**
300 * osl_statement_dispatch function:
301 * this function dispatches the relations from a relation list to the
302 * convenient fields of a statement structure: it extracts the domain,
303 * the scattering and the access list and store them accordingly in the
304 * statement structure provided as a parameter.
305 * \param[in,out] stmt The statement where to dispatch the relations.
306 * \param[in,out] list The "brute" relation list to sort and dispatch (freed).
307 */
308static
309void osl_statement_dispatch(osl_statement_p stmt, osl_relation_list_p list) {
310  osl_relation_list_p domain_list;
311  osl_relation_list_p scattering_list;
312  int nb_domains, nb_scattering, nb_accesses;
313
314  // Domain.
315  domain_list = osl_relation_list_filter(list, OSL_TYPE_DOMAIN);
316  nb_domains = osl_relation_list_count(domain_list);
317  if (nb_domains > 1)
318    OSL_error("more than one domain for a statement");
319
320  if (domain_list != NULL) {
321    stmt->domain = domain_list->elt;
322    domain_list->elt = NULL;
323    osl_relation_list_free(domain_list);
324  }
325  else {
326    stmt->domain = NULL;
327  }
328
329  // Scattering.
330  scattering_list=osl_relation_list_filter(list,OSL_TYPE_SCATTERING);
331  nb_scattering = osl_relation_list_count(scattering_list);
332  if (nb_scattering > 1)
333    OSL_error("more than one scattering relation for a statement");
334
335  if (scattering_list != NULL) {
336    stmt->scattering = scattering_list->elt;
337    scattering_list->elt = NULL;
338    osl_relation_list_free(scattering_list);
339  }
340  else {
341    stmt->scattering = NULL;
342  }
343
344  // Access.
345  stmt->access = osl_relation_list_filter(list, OSL_TYPE_ACCESS);
346  nb_accesses = osl_relation_list_count(stmt->access);
347
348  if ((nb_domains + nb_scattering + nb_accesses) !=
349      (osl_relation_list_count(list)))
350    OSL_error("unexpected relation type to define a statement");
351
352  osl_relation_list_free(list);
353}
354
355
356/**
357 * osl_statement_pread function ("precision read"):
358 * this function reads an osl_statement_t structure from an input stream
359 * (possibly stdin).
360 * \param[in] file      The input stream.
361 * \param[in] registry  The list of known interfaces (others are ignored).
362 * \param[in] precision The precision of the relation elements.
363 * \return A pointer to the statement structure that has been read.
364 */
365osl_statement_p osl_statement_pread(FILE * file, osl_interface_p registry,
366                                    int precision) {
367  osl_statement_p stmt = osl_statement_malloc();
368  osl_relation_list_p list;
369
370  if (file) {
371    // Read all statement relations.
372    list = osl_relation_list_pread(file, precision);
373
374    // Store relations at the right place according to their type.
375    osl_statement_dispatch(stmt, list);
376
377    // Read the body information.
378    if (osl_util_read_int(file, NULL) > 0)
379      stmt->body = osl_generic_read_one(file, registry);
380  }
381
382  return stmt;
383}
384
385
386/**
387 * osl_statement_read function:
388 * this function is equivalent to osl_statement_pread() except that
389 * (1) the precision corresponds to the precision environment variable or
390 *     to the highest available precision if it is not defined, and
391 * (2) the list of known interface is set to the default one.
392 * \see{osl_statement_pread}
393 */
394osl_statement_p osl_statement_read(FILE * foo) {
395  int precision = osl_util_get_precision();
396  osl_interface_p registry = osl_interface_get_default_registry();
397  osl_statement_p statement = osl_statement_pread(foo, registry, precision);
398
399  osl_interface_free(registry);
400  return statement;
401}
402
403
404/*+***************************************************************************
405 *                   Memory allocation/deallocation functions                *
406 *****************************************************************************/
407
408
409/**
410 * osl_statement_malloc function:
411 * this function allocates the memory space for an osl_statement_t
412 * structure and sets its fields with default values. Then it returns a pointer
413 * to the allocated space.
414 * \return A pointer to an empty statement with fields set to default values.
415 */
416osl_statement_p osl_statement_malloc() {
417  osl_statement_p statement;
418
419  OSL_malloc(statement, osl_statement_p, sizeof(osl_statement_t));
420  statement->domain     = NULL;
421  statement->scattering = NULL;
422  statement->access     = NULL;
423  statement->body       = NULL;
424  statement->next       = NULL;
425
426  return statement;
427}
428
429
430/**
431 * osl_statement_free function:
432 * this function frees the allocated memory for an osl_statement_t
433 * structure.
434 * \param[in,out] statement The pointer to the statement we want to free.
435 */
436void osl_statement_free(osl_statement_p statement) {
437  osl_statement_p next;
438
439  while (statement != NULL) {
440    next = statement->next;
441    osl_relation_free(statement->domain);
442    osl_relation_free(statement->scattering);
443    osl_relation_list_free(statement->access);
444    osl_generic_free(statement->body);
445
446    free(statement);
447    statement = next;
448  }
449}
450
451
452/*+***************************************************************************
453 *                            Processing functions                           *
454 *****************************************************************************/
455
456
457/**
458 * osl_statement_add function:
459 * this function adds a statement "statement" at the end of the statement
460 * list pointed by "location".
461 * \param[in,out] location  Address of the first element of the statement list.
462 * \param[in]     statement The statement to add to the list.
463 */
464void osl_statement_add(osl_statement_p * location,
465                       osl_statement_p   statement) {
466  while (*location != NULL)
467    location = &((*location)->next);
468
469  *location = statement;
470}
471
472
473/**
474 * osl_statement_number function:
475 * this function returns the number of statements in the statement list
476 * provided as parameter.
477 * \param[in] statement The first element of the statement list.
478 * \return The number of statements in the statement list.
479 */
480int osl_statement_number(osl_statement_p statement) {
481  int number = 0;
482
483  while (statement != NULL) {
484    number++;
485    statement = statement->next;
486  }
487  return number;
488}
489
490
491/**
492 * osl_statement_clone function:
493 * This functions builds and returns a "hard copy" (not a pointer copy) of an
494 * osl_statement_t data structure provided as parameter.
495 * \param[in] statement The pointer to the statement we want to clone.
496 * \return A pointer to the clone of the statement provided as parameter.
497 */
498osl_statement_p osl_statement_clone(osl_statement_p statement) {
499  int first = 1;
500  osl_statement_p clone = NULL, node, previous = NULL;
501
502  while (statement != NULL) {
503    node             = osl_statement_malloc();
504    node->domain     = osl_relation_clone(statement->domain);
505    node->scattering = osl_relation_clone(statement->scattering);
506    node->access     = osl_relation_list_clone(statement->access);
507    node->body       = osl_generic_clone(statement->body);
508    node->next       = NULL;
509
510    if (first) {
511      first = 0;
512      clone = node;
513      previous = node;
514    }
515    else {
516      previous->next = node;
517      previous = previous->next;
518    }
519
520    statement = statement->next;
521  }
522
523  return clone;
524}
525
526
527/**
528 * osl_statement_equal function:
529 * this function returns true if the two statements provided as parameters
530 * are the same, false otherwise (the usr field is not tested).
531 * \param[in] s1 The first statement.
532 * \param[in] s2 The second statement.
533 * \return 1 if s1 and s2 are the same (content-wise), 0 otherwise.
534 */
535int osl_statement_equal(osl_statement_p s1, osl_statement_p s2) {
536
537  if (s1 == s2)
538    return 1;
539
540  if (((s1->next != NULL) && (s2->next == NULL)) ||
541      ((s1->next == NULL) && (s2->next != NULL))) {
542    OSL_info("statements are not the same");
543    return 0;
544  }
545
546  if ((s1->next != NULL) && (s2->next != NULL)) {
547    if (!osl_statement_equal(s1->next, s2->next)) {
548      OSL_info("number of statements is not the same");
549      return 0;
550    }
551  }
552
553  if (!osl_relation_equal(s1->domain, s2->domain)) {
554    OSL_info("statement domains are not the same");
555    return 0;
556  }
557
558  if (!osl_relation_equal(s1->scattering, s2->scattering)) {
559    OSL_info("statement scatterings are not the same");
560    return 0;
561  }
562
563  if (!osl_relation_list_equal(s1->access, s2->access)) {
564    OSL_info("statement accesses are not the same");
565    return 0;
566  }
567
568  if (!osl_generic_equal(s1->body, s2->body)) {
569    OSL_info("statement bodies are not the same");
570    return 0;
571  }
572
573  return 1;
574}
575
576
577/**
578 * osl_statement_integrity_check function:
579 * this function checks that a statement is "well formed" according to some
580 * expected properties (setting an expected value to OSL_UNDEFINED means
581 * that we do not expect a specific value). It returns 0 if the check failed
582 * or 1 if no problem has been detected.
583 * \param[in] statement              The statement we want to check.
584 * \param[in] expected_nb_parameters Expected number of parameters.
585 * \return 0 if the integrity check fails, 1 otherwise.
586 */
587int osl_statement_integrity_check(osl_statement_p statement,
588                                  int expected_nb_parameters) {
589  int expected_nb_iterators;
590
591  while (statement != NULL) {
592    // Check the domain.
593    if (!osl_relation_integrity_check(statement->domain,
594                                      OSL_TYPE_DOMAIN,
595                                      OSL_UNDEFINED,
596                                      0,
597                                      expected_nb_parameters)) {
598      return 0;
599    }
600
601    // Get the number of iterators.
602    if (statement->domain != NULL)
603      expected_nb_iterators = statement->domain->nb_output_dims;
604    else
605      expected_nb_iterators = OSL_UNDEFINED;
606
607    // Check the scattering relation.
608    if (!osl_relation_integrity_check(statement->scattering,
609                                      OSL_TYPE_SCATTERING,
610                                      OSL_UNDEFINED,
611                                      expected_nb_iterators,
612                                      expected_nb_parameters)) {
613      return 0;
614    }
615
616    // Check the access relations.
617    if (!osl_relation_list_integrity_check(statement->access,
618                                           OSL_TYPE_ACCESS,
619                                           OSL_UNDEFINED,
620                                           expected_nb_iterators,
621                                           expected_nb_parameters)) {
622      return 0;
623    }
624
625    // Check the statement body.
626    if ((expected_nb_iterators != OSL_UNDEFINED) &&
627        (osl_generic_has_URI(statement->body, OSL_URI_BODY)) &&
628        (((osl_body_p)(statement->body->data))->iterators != NULL) &&
629        (expected_nb_iterators != osl_strings_size(
630            ((osl_body_p)(statement->body->data))->iterators))) {
631      OSL_warning("unexpected number of original iterators");
632      return 0;
633    }
634
635    statement = statement->next;
636  }
637
638  return 1;
639}
640
641
642/**
643 * osl_statement_get_nb_iterators function:
644 * this function returns the number of surroounding iterators of a given
645 * statement.
646 * \param statement The statement we want to know the number of iterators.
647 * \return The number of surrounding iterators for the statement.
648 */
649int osl_statement_get_nb_iterators(osl_statement_p statement) {
650
651  if (statement->domain == NULL) {
652    OSL_warning("no statement domain, assuming 0 iterators");
653    return 0;
654  }
655  else {
656    return statement->domain->nb_output_dims;
657  }
658}
659
660
661/**
662 * osl_statement_get_attributes function:
663 * this function returns, through its parameters, the maximum values of the
664 * relation attributes (nb_iterators, nb_parameters etc) in the statement.
665 * HOWEVER, it updates the parameter value iff the attribute is greater than
666 * the input parameter value. Hence it may be used to get the attributes as
667 * well as to find the maximum attributes for several statement lists. The
668 * array identifier 0 is used when there is no array identifier (AND this is
669 * OK), OSL_UNDEFINED is used to report it is impossible to provide the
670 * property while it should. This function is not intended for checking, the
671 * input statement should be correct.
672 * \param[in]     statement     The statement to extract attributes values.
673 * \param[in,out] nb_parameters Number of parameter attribute.
674 * \param[in,out] nb_iterators  Number of iterators attribute.
675 * \param[in,out] nb_scattdims  Number of scattering dimensions attribute.
676 * \param[in,out] nb_localdims  Number of local dimensions attribute.
677 * \param[in,out] array_id      Maximum array identifier attribute.
678 */
679void osl_statement_get_attributes(osl_statement_p statement,
680                                  int * nb_parameters,
681                                  int * nb_iterators,
682                                  int * nb_scattdims,
683                                  int * nb_localdims,
684                                  int * array_id) {
685  int local_nb_parameters = OSL_UNDEFINED;
686  int local_nb_iterators  = OSL_UNDEFINED;
687  int local_nb_scattdims  = OSL_UNDEFINED;
688  int local_nb_localdims  = OSL_UNDEFINED;
689  int local_array_id      = OSL_UNDEFINED;
690
691  while (statement != NULL) {
692    osl_relation_get_attributes(statement->domain,
693                                &local_nb_parameters,
694                                &local_nb_iterators,
695                                &local_nb_scattdims,
696                                &local_nb_localdims,
697                                &local_array_id);
698
699    osl_relation_get_attributes(statement->scattering,
700                                &local_nb_parameters,
701                                &local_nb_iterators,
702                                &local_nb_scattdims,
703                                &local_nb_localdims,
704                                &local_array_id);
705
706    osl_relation_list_get_attributes(statement->access,
707                                &local_nb_parameters,
708                                &local_nb_iterators,
709                                &local_nb_scattdims,
710                                &local_nb_localdims,
711                                &local_array_id);
712    // Update.
713    *nb_parameters = OSL_max(*nb_parameters, local_nb_parameters);
714    *nb_iterators  = OSL_max(*nb_iterators,  local_nb_iterators);
715    *nb_scattdims  = OSL_max(*nb_scattdims,  local_nb_scattdims);
716    *nb_localdims  = OSL_max(*nb_localdims,  local_nb_localdims);
717    *array_id      = OSL_max(*array_id,      local_array_id);
718    statement = statement->next;
719  }
720}
721
722