flag, so that it can be interleaved with the other walker. */
void irg_block_walk(ir_node *node,
void (pre)(ir_node*, void*), void (post)(ir_node*, void*),
flag, so that it can be interleaved with the other walker. */
void irg_block_walk(ir_node *node,
void (pre)(ir_node*, void*), void (post)(ir_node*, void*),