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

[jakub at gcc dot gnu.org]

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

--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-10-20 
14:46:24 UTC ---
Busy waiting is rarely a good idea, so it depends on what are you exactly
waiting for and whether say pthread_barrier_wait, or mutex, or condvar etc.
wouldn't be more appropriate.