isl_basic_set_opt: avoid invalid access on error path

[platform/upstream/isl.git] / basis_reduction_tab.c

diff --git a/basis_reduction_tab.c b/basis_reduction_tab.c
index 4ac27e2..6c7b040 100644 (file)
--- a/basis_reduction_tab.c
+++ b/basis_reduction_tab.c
@@ -1,14 +1,15 @@
 /*
  * Copyright 2008-2009 Katholieke Universiteit Leuven
  *
- * Use of this software is governed by the GNU LGPLv2.1 license
+ * Use of this software is governed by the MIT license
  *
  * Written by Sven Verdoolaege, K.U.Leuven, Departement
  * Computerwetenschappen, Celestijnenlaan 200A, B-3001 Leuven, Belgium
  */
 
 #include <assert.h>
-#include "isl_seq.h"
+#include <isl_map_private.h>
+#include <isl/seq.h>
 #include "isl_tab.h"
 
 struct tab_lp {
@@ -179,11 +180,13 @@ static int cut_lp_to_hyperplane(struct tab_lp *lp, isl_int *row)
                return -1;
 
        isl_int_neg(lp->row->el[0], lp->tmp);
-       lp->tab = isl_tab_add_eq(lp->tab, lp->row->el);
+       if (isl_tab_add_eq(lp->tab, lp->row->el) < 0)
+               return -1;
 
        isl_seq_cpy(lp->row->el + 1 + lp->dim, row, lp->dim);
        isl_seq_clr(lp->row->el + 1, lp->dim);
-       lp->tab = isl_tab_add_eq(lp->tab, lp->row->el);
+       if (isl_tab_add_eq(lp->tab, lp->row->el) < 0)
+               return -1;
 
        lp->con_offset += 2;
 
@@ -220,7 +223,8 @@ static int add_lp_row(struct tab_lp *lp, isl_int *row, int dim)
        isl_seq_cpy(lp->row->el + 1, row, lp->dim);
        isl_seq_neg(lp->row->el + 1 + lp->dim, row, lp->dim);
 
-       lp->tab = isl_tab_add_valid_eq(lp->tab, lp->row->el);
+       if (isl_tab_add_valid_eq(lp->tab, lp->row->el) < 0)
+               return -1;
 
        return lp->neq++;
 }