https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90267
--- Comment #3 from vfdff <zhongyunde at huawei dot com> --- but it doesn't warning anything, even with -Wstrict-aliasing -Wall. Accord to http://blog.sina.com.cn/s/blog_74caf0ce010173up.html, We expect an warning similar the following infomation. warning: dereferencing type-punned pointer will break strict-aliasing rules
