Add license to autogenerated files.

compiler_opt/tools/tflite_to_cpp.py

diff --git a/compiler_opt/tools/tflite_to_cpp.py b/compiler_opt/tools/tflite_to_cpp.py
index 47e7bcb..6decc35 100644
--- a/compiler_opt/tools/tflite_to_cpp.py
+++ b/compiler_opt/tools/tflite_to_cpp.py
@@ -121,6 +121,8 @@
   tflite_to_cpp_lib.print_llvm_registration_handle(
       model=model, base_class=FLAGS.base_class)
 
+  model = tflite_to_cpp_lib.add_license_and_notice(model=model)
+
   if FLAGS.clang_format_path:
     model = tflite_to_cpp_lib.format_model(
         model=model,

compiler_opt/tools/tflite_to_cpp_lib.py

diff --git a/compiler_opt/tools/tflite_to_cpp_lib.py b/compiler_opt/tools/tflite_to_cpp_lib.py
index 964e314..ca2f733 100644
--- a/compiler_opt/tools/tflite_to_cpp_lib.py
+++ b/compiler_opt/tools/tflite_to_cpp_lib.py
@@ -27,6 +27,25 @@
 _TFAGENTS_POLICY_NAME = 'action'
 _MODEL_NAMESPACE = 'llvm::emitc::generated'
 
+# pylint: disable=line-too-long
+_LICENSE_AND_NOTICE = """// 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
+//
+//      https://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.
+//
+// SPDX-License-Identifier: Apache-2.0
+
+// This code was originally sourced from github.com/iml130/mlir-emitc and has
+// been modified to fit the needs of generated C++ models in LLVM.
+"""
+
 
 def _fmt_includes(includes):
   return '\n'.join([f'#include "{hdr}"' for hdr in includes]) + '\n'
@@ -316,6 +335,12 @@
   return dataclasses.replace(model, hdr=new_hdr)
 
 
+def add_license_and_notice(model: EmitCModel) -> EmitCModel:
+  new_cpp = _LICENSE_AND_NOTICE + model.cpp
+  new_hdr = _LICENSE_AND_NOTICE + model.hdr
+  return dataclasses.replace(model, cpp=new_cpp, hdr=new_hdr)
+
+
 def print_llvm_registration_handle(model: EmitCModel, base_class: str):
   """Prints LLVM model registration code.