func isOperationRunSerially(ch <-chan interface{}, quit chan<- interface{}) bool {
	defer close(quit)
	numOperationsStarted := 0
loop:
	for {
		select {
		case <-ch:
			numOperationsStarted++
			if numOperationsStarted > 1 {
				return false
			}
		case <-time.After(5 * time.Second):
			break loop
		}
	}
	return true
}

		// or the other of hp and hu as the loop proceeds.
		//
		// hp is live during most of the body of the loop. But it isn't live
		// at the very top of the loop, when we haven't checked i<n yet, and
		// it could point off the end of the backing store.
		// hu is live only at the very top and very bottom of the loop.
		// In particular, only when it cannot possibly be live across a call.
		//

	// Ask signaller to setgid
	MOVW	$·Baton(SB), R2
storeloop:
	MOVW	0(R2), R0
	MOVW	$1, R1
	BL	cas<>(SB)
	BCC	storeloop

	// Wait for setgid completion
loop:
	MOVW	$0, R0
	MOVW	$0, R1
	BL	cas<>(SB)
	BCC	loop

	// Restore stack
	SUB	$(1024 * 8), R13

	MOVW	R4, R14

The "range" clause in a "for-range" loop now accepts iterator functions of the following types

	func(func() bool)
	func(func(K) bool)
	func(func(K, V) bool)

as range expressions.
Calls of the iterator argument function produce the iteration values for the "for-range" loop.
For details see the [language spec](/ref/spec#For_statements).

// findIndVar finds induction variables in a function.
//
// Look for variables and blocks that satisfy the following
//
//	 loop:
//	   ind = (Phi min nxt),
//	   if ind < max
//	     then goto enter_loop
//	     else goto exit_loop
//
//	   enter_loop:
//		do something
//	      nxt = inc + ind
//		goto loop
//
//	 exit_loop:
func findIndVar(f *Func) []indVar {
	var iv []indVar
	sdom := f.Sdom()

	}
	return bfr
}

// Loop handles the periodic timer and run requests.  This is expected to be
// called as a goroutine.
func (bfr *BoundedFrequencyRunner) Loop(stop <-chan struct{}) {
	klog.V(3).Infof("%s Loop running", bfr.name)
	bfr.timer.Reset(bfr.maxInterval)
	for {
		select {
		case <-stop:
			bfr.stop()
			klog.V(3).Infof("%s Loop stopping", bfr.name)
			return
		case <-bfr.timer.C():

		cidr, _ := cidrset.NewCIDRSet(clusterCIDRRange, 24)
		tc.fake.logger = logger
		sync := New(&tc.fake, &tc.fake, &tc.fake, tc.mode, "node1", cidr)
		doneChan := make(chan struct{})

		// Do a single step of the loop.
		go sync.Loop(logger, doneChan)
		sync.Update(tc.node)
		close(sync.opChan)
		<-doneChan
		tc.fake.dumpTrace()

		if !reflect.DeepEqual(tc.fake.events, tc.events) {

			// check that RET wasn't overwritten.
			if bytes.Contains(data[idx], []byte("RET")) {
				if testing.Short() {
					break LOOP
				}
				continue LOOP
			}
		}
		t.Errorf("VMOVUPS zeros<>(SB), %s overwrote RET", reg)
	}

// ultimate source of v.  v must be a copy op.
func copySource(v *Value) *Value {
	w := v.Args[0]

	// This loop is just:
	// for w.Op == OpCopy {
	//     w = w.Args[0]
	// }
	// but we take some extra care to make sure we
	// don't get stuck in an infinite loop.
	// Infinite copy loops may happen in unreachable code.
	// (TODO: or can they? Needs a test.)
	slow := w
	var advance bool

        }
        reload
        loop
        bind __PILLAR__LOCAL__DNS__ __PILLAR__DNS__SERVER__
        forward . __PILLAR__CLUSTER__DNS__ {
                force_tcp
        }
        prometheus :9253
        health __PILLAR__LOCAL__DNS__:8080
        }
    in-addr.arpa:53 {
        errors
        cache 30
        reload
        loop
        bind __PILLAR__LOCAL__DNS__ __PILLAR__DNS__SERVER__