[Bug c++/46143] __attribute__((optimize)) emits wrong code

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46143

--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2010-10-22 
22:53:17 UTC ---
here's one which avoids invalid iterators and stack smashing:


#include <cassert>
#include <vector>

struct foo { };
typedef std::vector<foo*> foov;

foov v(1);

int
#ifdef BUG
__attribute__((optimize(0)))
#endif
main() {
    foov::iterator it = v.begin();
    assert( &*it == &v.front() );
    return 0;
}