isl_tab_pip.c: use_shifted: avoid invalid access on error path

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>

diff --git a/isl_tab_pip.c b/isl_tab_pip.c
index 6f4a2a7..6d8496e 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)
 {
 
 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;
 }
 
        return cgbr->tab->bmap->n_eq == 0 && cgbr->tab->bmap->n_div == 0;
 }