https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62664
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> --- You need to use _mm_empty (). Read http://msdn.microsoft.com/en-us/library/ays9ef83(v=vs.90).aspx on why.