code: def add_aot_compile_cpu_subparser(subparsers):
      """Add parser for `aot_compile_cpu`."""
      compile_msg = "\n".join(
          [
              "Usage example:",
              "To compile a SavedModel signature via (CPU) XLA AOT:",
              "$saved_model_cli aot_compile_cpu \\",
              "   --dir /tmp/saved_model \\",
              "   --tag_set serve \\",
              "   --output_dir /tmp/saved_model_xla_aot",
              "",
              "",
              "Note: Additional XLA compilation options are available by setting the ",
              "XLA_FLAGS environment variable.  See the XLA debug options flags for ",
              "all the options: ",
              "  {}".format(_XLA_DEBUG_OPTIONS_URL),
              "",
              "For example, to disable XLA fast math when compiling:",
              "",
              'XLA_FLAGS="--xla_cpu_enable_fast_math=false" $saved_model_cli ',
              "aot_compile_cpu ...",
              "",
              "Some possibly useful flags:",
              "  --xla_cpu_enable_fast_math=false",
              "  --xla_force_host_platform_device_count=<num threads>",
              "    (useful in conjunction with disabling multi threading)",
          ]
      )
  
      parser_compile = subparsers.add_parser(
          "aot_compile_cpu",
          description=compile_msg,
          formatter_class=argparse.RawTextHelpFormatter,
      )
  
      parser_compile.set_defaults(func=aot_compile_cpu)
  
imports: import argparse
  import platform
  import ast
  import os
  import re
  from absl import app
  from absl import flags
  from absl.flags import argparse_flags
  import numpy
  from tensorflow.core.example import example_pb2
  from tensorflow.core.framework import types_pb2
  from tensorflow.core.protobuf import config_pb2
  from tensorflow.python.client import session
  from tensorflow.python.debug.wrappers import local_cli_wrapper
  from tensorflow.python.eager import def_function
  from tensorflow.python.eager import function
  from tensorflow.python.framework import meta_graph
  from tensorflow.python.framework import ops
  from tensorflow.python.framework import tensor_spec
  from tensorflow.python.lib.io import file_io
  from tensorflow.python.platform import tf_logging
  from tensorflow.python.saved_model import load
  from tensorflow.python.saved_model import load_options
  from tensorflow.python.saved_model import loader
  from tensorflow.python.saved_model import save
  from tensorflow.python.saved_model import signature_constants
  from tensorflow.python.tools import saved_model_aot_compile
  from tensorflow.python.tools import saved_model_utils
  from tensorflow.python.tpu import tpu
  from tensorflow.python.util.compat import collections_abc
label_desc: Use image node_id 35 for calling a global function with example usage: add_aot_compile_cpu_subparser(subparsers) without return types