namespace {

bool ShouldFallbackToGraphCompiler(
    const std::variant<MlirToHloArgs, FunctionToHloArgs>& computation) {
  if (computation.index() == 1) return true;

  return std::get<0>(computation).rollout_state ==
         ConfigProto::Experimental::MLIR_BRIDGE_ROLLOUT_DISABLED;
}

void DumpComputationInput(
    const std::variant<tpu::MlirToHloArgs, tpu::FunctionToHloArgs>
        computation) {
  if (!VLOG_IS_ON(2)) {

  module attributes {tf.versions = {bad_consumers = [], min_consumer = 0 : i32, producer = 268 : i32}} {
  func.func @main() -> () {
    func.return
  }
})";

MlirToHloArgs CreateTestMlirToHloArgs(const char* module_str = kMlirModuleStr) {
  MlirToHloArgs mlir_to_hlo_args;
  mlir_to_hlo_args.rollout_state =
      ConfigProto::Experimental::MLIR_BRIDGE_ROLLOUT_DISABLED;
  mlir_to_hlo_args.mlir_module = module_str;

// enable logging.
constexpr char kBridgeComponent[] = "TFXLABridge";

using tpu::MlirToHloArgs;
using tpu::ShardingAndIndex;

absl::StatusOr<std::string> CompileFromMlirToXlaHlo(
    bool lower_to_xla_hlo, const MlirToHloArgs& computation,
    const tpu::TPUCompileMetadataProto& metadata, llvm::StringRef device_type,

namespace tensorflow {
namespace tf2xla {
namespace internal {

using metrics::IncrementTfMlirBridgeSecondPhaseCounter;
using metrics::MlirBridgeSecondPhaseMetric;
using tpu::MlirToHloArgs;

absl::StatusOr<XlaCompilationResult> LegalizeTfToHlo(
    const tpu::MlirToHloArgs& computation,
    const tpu::TPUCompileMetadataProto& metadata, bool use_tuple_args,
    llvm::StringRef device_type,

#include "tensorflow/core/tpu/kernels/tpu_compile_op_support.h"
#include "tsl/platform/statusor.h"

namespace tensorflow {
namespace tf2xla {
namespace internal {
namespace {

using tpu::MlirToHloArgs;
using tpu::ShardingAndIndex;
using tpu::TPUCompileMetadataProto;

static constexpr char kMlirModuleStr[] = R"(
  module attributes {tf.versions = {bad_consumers = [], min_consumer = 0 : i32, producer = 268 : i32}} {

// then those passes include all the Legalization to XLA HLO which is returned
// in the compilation_result.
absl::StatusOr<std::string> CompileFromMlirToXlaHlo(
    bool lower_to_xla_hlo, const tpu::MlirToHloArgs& computation,
    const tpu::TPUCompileMetadataProto& metadata, llvm::StringRef device_type,
    const XlaShapeLayoutHelpers::ShapeDeterminationFns& shape_determination_fns,

#include "tsl/platform/statusor.h"

namespace tensorflow {
namespace tf2xla {
namespace internal {

using ::tensorflow::monitoring::testing::CellReader;
using tpu::MlirToHloArgs;
using tpu::ShardingAndIndex;
using tpu::TPUCompileMetadataProto;

static constexpr char kMlirLegalizeCount[] =
    "/tensorflow/core/tf2xla/v1/mlir_failed_xla_legalize_tf_count";

// compilation_result. If the input computation is in MLIR, it will be
// converted to a Tensorflow graph. Otherwise, the graph compiler will be run.
absl::Status CompileTensorflowGraphToHlo(
    const std::variant<tpu::MlirToHloArgs, tpu::FunctionToHloArgs>& computation,
    const tpu::TPUCompileMetadataProto& metadata, bool use_tuple_args,
    XlaShapeLayoutHelpers::ShapeDeterminationFns shape_determination_funcs,

namespace tf2xla {
namespace internal {

// Legalize the given MLIR module to XLA HLO using a combination of the MLIR
// Bridge and XlaBuilder
absl::StatusOr<XlaCompilationResult> LegalizeTfToHlo(
    const tpu::MlirToHloArgs& computation,
    const tpu::TPUCompileMetadataProto& metadata, bool use_tuple_args,
    llvm::StringRef device_type,
    XlaShapeLayoutHelpers::ShapeDeterminationFns shape_determination_fns,

//  per_core_arg_shapes - For each core, the shapes for each argument.
//  client - The Xla Compilation client.
absl::StatusOr<tensorflow::XlaCompilationResult> LegalizeMlirToHlo(
    const std::variant<tpu::MlirToHloArgs, tpu::FunctionToHloArgs>& computation,
    const tpu::TPUCompileMetadataProto& metadata, bool use_tuple_args,
    llvm::StringRef device_type,
    std::vector<std::unique_ptr<mlir::Pass>>& custom_legalization_passes,