- ifg_list_t *ifg = xmalloc(sizeof(*ifg));
- adj_head_t **adj_heads_array = xmalloc(env->irg->last_node_idx * sizeof(adj_heads_array[0]));
+ ifg_list_t *ifg = XMALLOC(ifg_list_t);
+ adj_head_t **adj_heads_array = XMALLOCNZ(adj_head_t*, env->irg->last_node_idx);