isl_multi_coalesce.c

   1 /*
   2  * Copyright 2013      Ecole Normale Superieure
   3  *
   4  * Use of this software is governed by the MIT license
   5  *
   6  * Written by Sven Verdoolaege,
   7  * Ecole Normale Superieure, 45 rue d'Ulm, 75230 Paris, France
   8  */
   9
  10 #include <isl_multi_macro.h>
  11
  12 /* Coalesce the elements of "multi".
  13  *
  14  * Note that such coalescing does not change the meaning of "multi"
  15  * so there is no need to cow.  We do need to be careful not to
  16  * destroy any other copies of "multi" in case of failure.
  17  */
  18 __isl_give MULTI(BASE) *FN(MULTI(BASE),coalesce)(__isl_take MULTI(BASE) *multi)
  19 {
  20         int i;
  21
  22         if (!multi)
  23                 return NULL;
  24
  25         for (i = 0; i < multi->n; ++i) {
  26                 EL *el = FN(EL,copy)(multi->u.p[i]);
  27                 el = FN(EL,coalesce)(el);
  28                 if (!el)
  29                         return FN(MULTI(BASE),free)(multi);
  30                 FN(EL,free)(multi->u.p[i]);
  31                 multi->u.p[i] = el;
  32         }
  33
  34         return multi;
  35 }