fix crash

diff --git a/ir/opt/combo.c b/ir/opt/combo.c
index 27aa76a..45f1250 100644 (file)
--- a/ir/opt/combo.c
+++ b/ir/opt/combo.c
@@ -606,7 +606,7 @@ static void sort_irn_outs(node_t *node)
        unsigned n_outs = get_irn_n_outs(irn);
        qsort(irn->o.out->edges, n_outs, sizeof(irn->o.out->edges[0]),
                  cmp_def_use_edge);
-       node->max_user_input = irn->o.out->edges[n_outs-1].pos;
+       node->max_user_input = n_outs > 0 ? irn->o.out->edges[n_outs-1].pos : -1;
 }  /* sort_irn_outs */
 
 /**