232             let node = &mut self.blocks[block];  in append_block()  localVariable
233             debug_assert!(node.first_inst.is_none() && node.last_inst.is_none());  in append_block()
234             node.prev = self.last_block.into();  in append_block()
235             node.next = None.into();  in append_block()
257             let node = &mut self.blocks[block];  in insert_block()  localVariable
258             node.next = before.into();  in insert_block()
259             node.prev = after;  in insert_block()
280             let node = &mut self.blocks[block];  in insert_block_after()  localVariable
281             node.next = before;  in insert_block_after()
282             node.prev = after.into();  in insert_block_after()
557             let node = &mut self.blocks[new_block];  in split_block()  localVariable
558             node.prev = old_block.into();  in split_block()
559             node.next = next_block;  in split_block()
560             node.first_inst = before.into();  in split_block()
561             node.last_inst = last_inst;  in split_block()