}

mlir::LogicalResult GetDeviceOrdinalFromDeviceString(mlir::Location loc,
                                                     llvm::StringRef device,
                                                     int64_t* device_ordinal) {
  DeviceNameUtils::ParsedName parsed_name;
  if (!DeviceNameUtils::ParseFullName(
          absl::string_view(device.data(), device.size()), &parsed_name))

mlir::LogicalResult GetDeviceOrdinalFromDeviceString(mlir::Location loc,
                                                     llvm::StringRef device,
                                                     int64_t* device_ordinal);

}  // namespace tensorflow

// CHECK:      tf_executor.fetch


// Tests tf._TPUDeviceOrdinalPlaceholder ops are replaced with explicit device
// ordinal constant values based on the first TPU core device id.
// CHECK-LABEL: func @device_ordinals
func.func @device_ordinals() {
  tf_executor.graph {
    %0:3 = tf_executor.island {

  XlaDevice::Options options;
  options.platform = platform;
  options.device_name_prefix = name_prefix;
  options.device_name = DEVICE_XLA_CPU;
  options.device_ordinal = 0;
  options.compilation_device_name = DEVICE_CPU_XLA_JIT;
  options.use_multiple_streams = false;
  XlaShapeLayoutHelpers::ShapeDeterminationFns shape_representation_fns{

  }
  for (int i : *gpu_ids) {
    XlaDevice::Options options;
    options.platform = platform.value();
    options.device_name_prefix = name_prefix;
    options.device_name = DEVICE_XLA_GPU;
    options.device_ordinal = i;
    options.compilation_device_name = DEVICE_GPU_XLA_JIT;
    options.use_multiple_streams = true;
    options.allowed_devices = gpu_ids;
    XlaShapeLayoutHelpers::ShapeDeterminationFns shape_representation_fns{

  // is replaced and the managed memory deallocated.
  Status AllocateShapedBuffer(DataType dtype, const xla::Shape& on_device_shape,
                              xla::LocalClient* client, int device_ordinal);

  // Some Tensors can have complex on-device shapes, including tuple shapes. To
  // manage the memory for these tensors a ShapedBuffer may be required.

  // Return true if this XlaTensor contains a ShapedBuffer.