snake_case = ''.join(['_' + i.lower() if i.isupper() else i for i in s
                       ]).lstrip('_')
  return snake_case.replace('mat_mul', 'matmul').replace('bias_add', 'bias')


def _substitute_impl_function_name_template(module: str) -> str:
  """Generates the op-specific implementation function name."""
  compiled_regex = re.compile(r'GenerateImplFunctionName\(([\w\s]+)\)')
  while True: