[Bug c++/46096] Code produces two different outputs when optimized respectively with -O2 and without it.

[redi at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46096

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID
           Severity|major                       |normal

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> 2010-10-20 
14:00:49 UTC ---
There is no memory synchronisation, so there is no guarantee that the write to
alpha1->number ever becomes visible to other threads.