http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57813
--- Comment #5 from Daniel Oertwig <daniel.oertwig at gmail dot com> --- (In reply to Andrew Pinski from comment #3) > 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. Shouldn't the compiler recognize that enforceTimeslice is altering the global variable?