- if (!post) irg_walk_2_pre (node, pre, env);
- else if (!pre) irg_walk_2_post(node, post, env);
- else irg_walk_2_both(node, pre, post, env);
+ if (!post) return irg_walk_2_pre (node, pre, env);
+ else if (!pre) return irg_walk_2_post(node, post, env);
+ else return irg_walk_2_both(node, pre, post, env);