isl_ast_codegen.c: generate_sorted_domains: avoid invalid access on error

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

diff --git a/isl_ast_codegen.c b/isl_ast_codegen.c
index 1ada490..9d4d93b 100644 (file)
--- a/isl_ast_codegen.c
+++ b/isl_ast_codegen.c
@@ -1737,6 +1737,8 @@ static __isl_give isl_ast_graft_list *generate_sorted_domains(
        data.depth = isl_ast_build_get_depth(build);
        data.piece = domain_list->p;
        g = isl_tarjan_graph_init(ctx, n, &domain_follows_at_depth, &data);
+       if (!g)
+               goto error;
 
        i = 0;
        while (list && n) {