[Bug c++/111026] Incorrect optimization with -o1,-o2

[zhaiqiming at baidu dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111026

--- Comment #3 from zhaiqiming at baidu dot com ---
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[head file]


#include <stdlib.h>
#include <vector>
#include <iostream>
#include <pthread.h>