isl_multi_coalesce.c

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/*
 * Copyright 2013      Ecole Normale Superieure
 *
 * Use of this software is governed by the MIT license
 *
 * Written by Sven Verdoolaege,
 * Ecole Normale Superieure, 45 rue d'Ulm, 75230 Paris, France
 */
 
#include <isl_multi_macro.h>
 
/* Coalesce the elements of "multi".
 *
 * Note that such coalescing does not change the meaning of "multi"
 * so there is no need to cow.  We do need to be careful not to
 * destroy any other copies of "multi" in case of failure.
 */
__isl_give MULTI(BASE) *FN(MULTI(BASE),coalesce)(__isl_take MULTI(BASE) *multi)
{
  int i;
 
  if (!multi)
    return NULL;
 
  for (i = 0; i < multi->n; ++i) {
    EL *el = FN(EL,copy)(multi->u.p[i]);
    el = FN(EL,coalesce)(el);
    if (!el)
      return FN(MULTI(BASE),free)(multi);
    FN(EL,free)(multi->u.p[i]);
    multi->u.p[i] = el;
  }
 
  return multi;
}