// CHECK-NEXT:     "tf_device.launch"
    // CHECK-DAG:        %[[PROGRAM_OUTPUT:[a-z_0-9]*]] = "tf._XlaCompileMlirPlaceholderProgramKey"
    // CHECK-DAG:        %[[DEVICE_ORDINAL:[a-z_0-9]+]] = "tf._TPUDeviceOrdinalPlaceholder"
    // CHECK:            %[[RECV_OUTPUT:[0-9]*]] = "tf._XlaRecvAtHostV2"(%[[PROGRAM_OUTPUT]], %[[DEVICE_ORDINAL]])
    // CHECK-SAME:       key = "host_compute_channel_0_args"

    // expected-remark@above {{ID: 4}}
  }
  func.return
  // expected-remark@above {{ID: 6}}
  // expected-remark@above {{Sinks: {}}}
}

// -----

// Tests that `_TPUDeviceOrdinalPlaceholder` is side-effect-free.
func.func @device_ordinal_placeholder_side_effect_free(
  // expected-remark@above {{ID: 7}}
  ) {
  tf_executor.graph {
    // expected-remark@above {{ID: 5}}