------- Comment #5 from t dot artem at mailcity dot com 2010-08-02 13:15 ------- I've found the culprit (or better say mplayer developer hinted), it is -fstrict-aliasing optimization.
With -fno-strict-aliasing GCC 4.4.x and 4.5.x produce proper code. Please, advise. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45160