/// VisitLoop - Clear out any previous state and analyze the given loop.
///
void VisitLoop(const MachineLoop *Loop) {
- Deps.clear();
+ assert(Deps.empty() && "stale loop dependencies");
+
MachineBasicBlock *Header = Loop->getHeader();
SmallSet<unsigned, 8> LoopLiveIns;
for (MachineBasicBlock::livein_iterator LI = Header->livein_begin(),