Beispiel #1
0
/// 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);
}
Beispiel #2
0
/// 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);
    }
}