text: /* Copyright 2017 The TensorFlow Authors. All Rights Reserved.
  
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at
  
      http://www.apache.org/licenses/LICENSE-2.0
  
  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  ==============================================================================*/
  
  #include <stdio.h>
  
  #include <memory>
  #include <string>
  #include <utility>
  
  #include "absl/types/span.h"
  #include "tensorflow/compiler/xla/client/client.h"
  #include "tensorflow/compiler/xla/client/client_library.h"
  #include "tensorflow/compiler/xla/client/local_client.h"
  #include "tensorflow/compiler/xla/client/xla_computation.h"
  #include "tensorflow/compiler/xla/service/hlo.pb.h"
  #include "tensorflow/compiler/xla/service/service.h"
  #include "tensorflow/compiler/xla/statusor.h"
  #include "tensorflow/compiler/xla/types.h"
  #include "tensorflow/core/platform/env.h"
  #include "tensorflow/core/platform/init_main.h"
  #include "tensorflow/core/platform/logging.h"
  
  namespace xla {
  namespace tools {
  
  void RealMain(absl::Span<char* const> args, bool compile) {
    LocalClient* client = ClientLibrary::LocalClientOrDie();
    LocalService* local_service =
        ClientLibrary::GetXlaService(client->platform());
    for (char* arg : args) {
      HloSnapshot snapshot;
      TF_CHECK_OK(tensorflow::ReadBinaryProto(tensorflow::Env::Default(), arg,
                                              &snapshot));
      auto computation_status = client->LoadSnapshot(snapshot);
      if (!computation_status.ok()) {
        fprintf(stderr, "could not load snapshot for %s: %s\n", arg,
                computation_status.status().ToString().c_str());
        continue;
      }
      XlaComputation computation = std::move(computation_status).value();
  
      if (compile) {
        std::unique_ptr<ProgramShape> program_shape =
            client->GetComputationShape(computation).value();
  
        std::vector<const Shape*> layouts;
        layouts.reserve(program_shape->parameters_size());
        for (int i = 0; i < program_shape->parameters_size(); ++i) {
          layouts.push_back(&program_shape->parameters(i));
        }
  
        ExecutableBuildOptions build_options;
        build_options.set_device_ordinal(0);
        build_options.set_result_layout(program_shape->result());
        auto executables =
            local_service->CompileExecutables(computation, layouts, build_options)
                .value();
        CHECK_EQ(executables.size(), 1);
        const HloModule& module = executables[0]->module();
  
        fprintf(stdout, "HLO compiled for %s backend:\n%s\n",
                local_service->backend().platform()->Name().c_str(),
                module.ToString(HloPrintOptions::ShortParsable()).c_str());
      } else {
        auto config = HloModule::CreateModuleConfigFromProto(computation.proto(),
                                                             DebugOptions())
                          .value();
        std::unique_ptr<HloModule> module =
            HloModule::CreateFromProto(computation.proto(), config).value();
  
        fprintf(stdout, "%s\n",
                module->ToString(HloPrintOptions::ShortParsable()).c_str());
      }
    }
  }
  
  }  // namespace tools
  }  // namespace xla
  
  int main(int argc, char** argv) {
    bool compile = false;
    std::vector<tensorflow::Flag> flag_list = {
        {"compile", &compile,
         "If true, compile the computation using the default client before "
         "dumping the HLO. Otherwise dump the raw (uncompiled) HLO."},
    };
    const std::string usage = tensorflow::Flags::Usage(argv[0], flag_list);
    bool parsed_flags_ok = tensorflow::Flags::Parse(&argc, argv, flag_list);
    QCHECK(parsed_flags_ok) << "\n" << usage;
  
    tensorflow::port::InitMain(usage.c_str(), &argc, &argv);
    QCHECK(argc > 1) << "\nERROR: must specify at least one module\n" << usage;
  
    absl::Span<char* const> args(argv, argc);
    args.remove_prefix(1);  // Pop off the binary name, argv[0]
    xla::tools::RealMain(args, compile);
    return 0;
  }
  