/// ReleaseSucc - Decrement the NumPredsLeft count of a successor. Add it to
/// the PendingQueue if the count reaches zero. Also update its cycle bound.
void ScheduleDAGList::ReleaseSucc(SUnit *SU, const SDep &D) {
SUnit *SuccSU = D.getSUnit();
#ifndef NDEBUG
if (SuccSU->NumPredsLeft == 0) {
errs() << "*** Scheduling failed! ***\n";
SuccSU->dump(this);
errs() << " has been released too many times!\n";
llvm_unreachable(0);
}
#endif
--SuccSU->NumPredsLeft;
SuccSU->setDepthToAtLeast(SU->getDepth() + D.getLatency());
// If all the node's predecessors are scheduled, this node is ready
// to be scheduled. Ignore the special ExitSU node.
if (SuccSU->NumPredsLeft == 0 && SuccSU != &ExitSU)
PendingQueue.push_back(SuccSU);
}
/// releaseSucc - Decrement the NumPredsLeft count of a successor. Add it to
/// the PendingQueue if the count reaches zero. Also update its cycle bound.
void ScheduleDAGVLIW::releaseSucc(SUnit *SU, const SDep &D) {
SUnit *SuccSU = D.getSUnit();
#ifndef NDEBUG
if (SuccSU->NumPredsLeft == 0) {
dbgs() << "*** Scheduling failed! ***\n";
SuccSU->dump(this);
dbgs() << " has been released too many times!\n";
llvm_unreachable(nullptr);
}
#endif
assert(!D.isWeak() && "unexpected artificial DAG edge");
--SuccSU->NumPredsLeft;
SuccSU->setDepthToAtLeast(SU->getDepth() + D.getLatency());
// If all the node's predecessors are scheduled, this node is ready
// to be scheduled. Ignore the special ExitSU node.
if (SuccSU->NumPredsLeft == 0 && SuccSU != &ExitSU) {
PendingQueue.push_back(SuccSU);
}
}