// CHECK:           %[[RECV0:.+]] = "tf._XlaRecvAtHost"(%[[PROGRAM0]])
    // CHECK-SAME:        device_ordinal = 0
    // CHECK-SAME:        key = "host_compute_channel_0_args"
    // CHECK-SAME:        _xla_has_host_transfer = true
    // CHECK:           %[[B0:.+]] = "tf.OpB"(%[[RECV0]]) : (tensor<2x2xi64>) -> tensor<2x2xi64>

  // CHECK:      [[RECV0_RETVAL0_TUPLE:%.*]]:2 = "mhlo.recv"([[SEND0_ARG0_TOKEN]])
  // CHECK-SAME: channel_handle = #mhlo.channel_handle
  // CHECK-SAME: handle =
  // CHECK-SAME: type = 3
  // CHECK-SAME: mhlo.frontend_attributes = {_xla_host_transfer_handler_name = "tf_rendezvous", _xla_host_transfer_rendezvous = "recv0_htod_0"}

	select {
	case c <- 1:
	}
}

func send3(recv func(<-chan int)) {
	c := make(chan int)
	go recv(c)
	runtime.Gosched()
	c2 := make(chan int)
	select {
	case c <- 1:
	case c2 <- 1:
	}
}

func main() {
	send1(recv1)
	send2(recv1)
	send3(recv1)
	send1(recv2)
	send2(recv2)
	send3(recv2)
	send1(recv3)
	send2(recv3)
	send3(recv3)

    Node* recv1 = RecvAtHost(
        ops::NodeOut(key_constant, 0), "F1", "F1", "O1", {DT_FLOAT, DT_FLOAT},
        b2.opts().WithAttr(kXlaHasHostTransferAttrName, true));
    Node* e = Binary(ops::NodeOut(recv1, 0), ops::NodeOut(recv1, 1),
                     b2.opts()
                         .WithName("E")
                         .WithControlInputs({recv1})

	"golang.org/x/tools/internal/aliases"
)

// ReceiverNamed returns the named type (if any) associated with the
// type of recv, which may be of the form N or *N, or aliases thereof.
// It also reports whether a Pointer was present.
func ReceiverNamed(recv *types.Var) (isPtr bool, named *types.Named) {
	t := recv.Type()
	if ptr, ok := aliases.Unalias(t).(*types.Pointer); ok {
		isPtr = true
		t = ptr.Elem()
	}

			// we copy directly. Note that we need to increment
			// the head/tail locations only when raceenabled.
			racenotify(c, c.recvx, nil)
			racenotify(c, c.recvx, sg)
			c.recvx++
			if c.recvx == c.dataqsiz {
				c.recvx = 0
			}
			c.sendx = c.recvx // c.sendx = (c.sendx+1) % c.dataqsiz
		}
	}
	if sg.elem != nil {
		sendDirect(c.elemtype, sg, ep)
		sg.elem = nil
	}
	gp := sg.g

			for p := 0; p < P; p++ {
				go func() {
					recv := make(map[int]int)
					for i := 0; i < L; i++ {
						v := <-c
						recv[v] = recv[v] + 1
					}
					done <- recv
				}()
			}
			recv := make(map[int]int)
			for p := 0; p < P; p++ {
				for k, v := range <-done {
					recv[k] = recv[k] + v
				}
			}
			if len(recv) != L {

package main

type Recv <-chan int

type sliceOf[E any] interface {
	~[]E
}

func _Append[S sliceOf[T], T any](s S, t ...T) S {
	return append(s, t...)
}

func main() {
	recv := make(Recv)
	a := _Append([]Recv{recv}, recv)
	if len(a) != 2 || a[0] != recv || a[1] != recv {
		panic(a)
	}

	recv2 := make(chan<- int)
	a2 := _Append([]chan<- int{recv2}, recv2)

	if x := c.Recv(); x != 1 {
		println("testasync1: Recv did not get 1:", x, c.Impl())
		failed = true
	}

	test1(c)
}

func testasync2(c Chan) {
	// should be able to get the last value via Recv2
	if x, ok := c.Recv2(); x != 1 || !ok {
		println("testasync1: Recv did not get 1, true:", x, ok, c.Impl())
		failed = true
	}

	test1(c)
}

func testasync3(c Chan) {

		}
		racenotify(c, c.recvx, nil)
	}
	if msanenabled && cas.elem != nil {
		msanwrite(cas.elem, c.elemtype.Size_)
	}
	if asanenabled && cas.elem != nil {
		asanwrite(cas.elem, c.elemtype.Size_)
	}
	recvOK = true
	qp = chanbuf(c, c.recvx)
	if cas.elem != nil {
		typedmemmove(c.elemtype, cas.elem, qp)
	}
	typedmemclr(c.elemtype, qp)
	c.recvx++
	if c.recvx == c.dataqsiz {
		c.recvx = 0