Fix the error in non-asserts Release mode build. NFC

[sgundapa]

The patch should be merged only if it is not changing the functionality of the code .

[sgundapa]

This patch indeed causes a lot of crashes in unit tests

[grosser]

LGTM.

Feel free to commit.

Tobias

[sgundapa]

Committed revision 258318

[sgundapa]

Committed revision 258318.

lib/Analysis/ScopInfo.cpp

bool Scop::isIgnored(RegionNode *RN) {
   return false;
 }
 
 struct MapToDimensionDataTy {
   int N;
   isl_union_pw_multi_aff *Res;
 };
 
+#ifndef NDEBUG
 // @brief Create a function that maps the elements of 'Set' to its N-th
 //        dimension and add it to User->Res.
 //
 // @param Set        The input set.
 // @param User->N    The dimension to map to.
 // @param User->Res  The isl_union_pw_multi_aff to which to add the result.
 //
 // @returns   isl_stat_ok if no error occured, othewise isl_stat_error.
static isl_stat mapToDimension_AddSet(__isl_take isl_set *Set, void *User) {
   if (Data->N > 1)
     PMA = isl_pw_multi_aff_drop_dims(PMA, isl_dim_out, 0, Data->N - 1);
   Data->Res = isl_union_pw_multi_aff_add_pw_multi_aff(Data->Res, PMA);
 
   isl_set_free(Set);
 
   return isl_stat_ok;
 }
+#endif
 
 // @brief Create an isl_multi_union_aff that defines an identity mapping
 //        from the elements of USet to their N-th dimension.
 //
 // # Example:
 //
 //            Domain: { A[i,j]; B[i,j,k] }
 //                 N: 1
mapToDimension(__isl_take isl_union_set *USet, int N) {
 
   struct MapToDimensionDataTy Data;
 
   auto *Space = isl_union_set_get_space(USet);
   auto *PwAff = isl_union_pw_multi_aff_empty(Space);
 
   Data = {N, PwAff};
 
+#ifndef NDEBUG
   auto Res = isl_union_set_foreach_set(USet, &mapToDimension_AddSet, &Data);
 
   assert(Res == isl_stat_ok);
+#endif
 
   isl_union_set_free(USet);
   return isl_multi_union_pw_aff_from_union_pw_multi_aff(Data.Res);
 }
 
 void Scop::addScopStmt(BasicBlock *BB, Region *R) {
   if (BB) {
     Stmts.emplace_back(*this, *BB);