http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57813
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |RESOLVED Resolution|--- |INVALID --- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- taskInfo.ready[priority]->wakeTime = Task_enforceTimeslice(priority); This is the same as: (*taskInfo.ready[priority]).wakeTime = Task_enforceTimeslice(priority); Which means either the compiler can read the value of taskInfo.ready[priority] before or after the function call to Task_enforceTimeslice because there is no sequence point between them.