http://blog.youkuaiyun.com/bingduanlbd/article/details/8524300
http://hllvm.group.iteye.com/group/topic/34932#232535
http://hllvm.group.iteye.com/group/topic/21769
http://blog.youkuaiyun.com/bingduanlbd/article/details/8524300
http://hllvm.group.iteye.com/group/topic/34932#232535
http://hllvm.group.iteye.com/group/topic/21769