isl_basic_set_opt: avoid invalid access on error path

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

diff --git a/isl_tab_pip.c b/isl_tab_pip.c
index 6f4a2a7..7fb34c7 100644 (file)
--- a/isl_tab_pip.c
+++ b/isl_tab_pip.c
@@ -2729,6 +2729,8 @@ static struct isl_basic_set *drop_constant_terms(struct isl_basic_set *bset)
 
 static int use_shifted(struct isl_context_gbr *cgbr)
 {
+       if (!cgbr->tab)
+               return 0;
        return cgbr->tab->bmap->n_eq == 0 && cgbr->tab->bmap->n_div == 0;
 }
 
@@ -3220,6 +3222,9 @@ static void *context_gbr_save(struct isl_context *context)
        struct isl_context_gbr *cgbr = (struct isl_context_gbr *)context;
        struct isl_gbr_tab_undo *snap;
 
+       if (!cgbr->tab)
+               return NULL;
+
        snap = isl_alloc_type(cgbr->tab->mat->ctx, struct isl_gbr_tab_undo);
        if (!snap)
                return NULL;