--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang/tools/clang-fuzzer/ExampleClangLoopProtoFuzzer.cpp	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,29 @@
+//===-- ExampleClangLoopProtoFuzzer.cpp - Fuzz Clang ----------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+///  This file implements a function that runs Clang on a single
+///  input and uses libprotobuf-mutator to find new inputs. This function is
+///  then linked into the Fuzzer library. This file differs from
+///  ExampleClangProtoFuzzer in that it uses a different protobuf that includes
+///  C++ code with a single for loop.
+///
+//===----------------------------------------------------------------------===//
+
+#include "cxx_loop_proto.pb.h"
+#include "fuzzer-initialize/fuzzer_initialize.h"
+#include "handle-cxx/handle_cxx.h"
+#include "proto-to-cxx/proto_to_cxx.h"
+#include "src/libfuzzer/libfuzzer_macro.h"
+
+using namespace clang_fuzzer;
+
+DEFINE_BINARY_PROTO_FUZZER(const LoopFunction &input) {
+  auto S = LoopFunctionToString(input);
+  HandleCXX(S, GetCLArgs());
+}