isl_pw_qpolynomial_fold_bound: avoid access to freed memory

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

diff --git a/isl_dim.c b/isl_dim.c
index 1fb7c44..4b5d2c0 100644 (file)
--- a/isl_dim.c
+++ b/isl_dim.c
@@ -118,7 +118,8 @@ static struct isl_dim *set_name(struct isl_dim *dim,
                goto error;
 
        pos = global_pos(dim, type, pos);
-       isl_assert(ctx, pos != isl_dim_total(dim), goto error);
+       if (pos == isl_dim_total(dim))
+               goto error;
 
        if (pos >= dim->n_name) {
                if (!name)
@@ -957,7 +958,7 @@ struct isl_dim *isl_dim_underlying(struct isl_dim *dim, unsigned n_div)
 
 unsigned isl_dim_total(struct isl_dim *dim)
 {
-       return dim->nparam + dim->n_in + dim->n_out;
+       return dim ? dim->nparam + dim->n_in + dim->n_out : 0;
 }
 
 int isl_dim_equal(struct isl_dim *dim1, struct isl_dim *dim2)