http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46829
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> 2010-12-07 23:54:42 UTC --- (In reply to comment #7) > If you compile with dispatch scheduling enabled (together with -march=bdver1), > both test cases attached PASS. > > gcc -O2 -fschedule-insns -fsched-pressure -mdispatch-scheduler -march=bdver1 You can turn it on for -march=bdver1.