case 7:
		y = 49
	case 8:
		y = 64
	default:
		panic("too large")
	}

	// check PC is in the same function
	runtime.Callers(1, pc1[:])
	if pc1[0] < pc0[0] || pc1[0] > pc0[0]+1000000 {
		fmt.Printf("jump across DSO boundary. pc0=%x, pc1=%x\n", pc0[0], pc1[0])
		panic("FAIL")
	}

	if y != x*x {
		fmt.Printf("x=%d y=%d!=%d\n", x, y, x*x)
		panic("FAIL")
	}

	pb1 = pb0 // ERROR "cannot use|incompatible"
	pb1 = pb  // ERROR "cannot use|incompatible"

	pc0 = pc  // ERROR "cannot use|incompatible"
	pc0 = pc1 // ERROR "cannot use|incompatible"
	pc = pc0  // ERROR "cannot use|incompatible"
	pc = pc1  // ERROR "cannot use|incompatible"
	pc1 = pc0 // ERROR "cannot use|incompatible"
	pc1 = pc  // ERROR "cannot use|incompatible"

	pf0 = pf  // ERROR "cannot use|incompatible"

	var pc0, pcs ir.Node
	if base.Flag.Race {
		pcs = typecheck.TempAt(base.Pos, ir.CurFunc, types.NewArray(types.Types[types.TUINTPTR], int64(ncas)))
		pc0 = typecheck.Expr(typecheck.NodAddr(ir.NewIndexExpr(base.Pos, pcs, ir.NewInt(base.Pos, 0))))
	} else {
		pc0 = typecheck.NodNil()
	}

	// register cases
	for _, cas := range cases {

		copy(orig[nsends:], orig[len(cases)-nrecvs:])
	}

	order := make([]uint16, 2*(nsends+nrecvs))
	var pc0 *uintptr
	if raceenabled {
		pcs := make([]uintptr, nsends+nrecvs)
		for i := range pcs {
			selectsetpc(&pcs[i])
		}
		pc0 = &pcs[0]
	}

	chosen, recvOK := selectgo(&sel[0], &order[0], pc0, nsends, nrecvs, dflt == -1)

	// Translate chosen back to caller's ordering.
	if chosen < 0 {

		// instead on the g0 stack.
		throw("cannot trace user goroutine on its own stack")
	}

	if pc0 == ^uintptr(0) && sp0 == ^uintptr(0) { // Signal to fetch saved values from gp.
		if gp.syscallsp != 0 {
			pc0 = gp.syscallpc
			sp0 = gp.syscallsp
			if usesLR {
				lr0 = 0
			}
		} else {
			pc0 = gp.sched.pc
			sp0 = gp.sched.sp
			if usesLR {
				lr0 = gp.sched.lr
			}
		}
	}

func selectnbsend(hchan chan<- any, elem *any) bool
func selectnbrecv(elem *any, hchan <-chan any) (bool, bool)

func selectsetpc(pc *uintptr)
func selectgo(cas0 *byte, order0 *byte, pc0 *uintptr, nsends int, nrecvs int, block bool) (int, bool)
func block()

func makeslice(typ *byte, len int, cap int) unsafe.Pointer
func makeslice64(typ *byte, len int64, cap int64) unsafe.Pointer

  // CHECK: %[[READ:.*]] = "tf.ReadVariableOp"(%[[VH]])
  // CHECK: %[[CLUSTER:.*]] = "tf_device.cluster"()
  %2 = "tf_device.cluster"() ({
    // CHECK: %[[PC0:.*]] = "tf.PartitionedCall"(%[[CONST]], %[[READ]], %[[CONST]])
    // CHECK-SAME: f = @callee_resource_lifted
    %3 = "tf.PartitionedCall"(%1, %0, %1) {f = @callee, config = "", config_proto = "", executor_type = ""}