--- a/libsanitizer/ubsan/ubsan_type_hash.h	Thu Oct 25 07:37:49 2018 +0900
+++ b/libsanitizer/ubsan/ubsan_type_hash.h	Thu Feb 13 11:34:05 2020 +0900
@@ -1,7 +1,8 @@
 //===-- ubsan_type_hash.h ---------------------------------------*- C++ -*-===//
 //
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
+// 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
 //
 //===----------------------------------------------------------------------===//
 //
@@ -63,6 +64,10 @@
 extern "C" SANITIZER_INTERFACE_ATTRIBUTE
 HashValue __ubsan_vptr_type_cache[VptrTypeCacheSize];
 
+/// \brief Do whatever is required by the ABI to check for std::type_info
+/// equivalence beyond simple pointer comparison.
+bool checkTypeInfoEquality(const void *TypeInfo1, const void *TypeInfo2);
+
 } // namespace __ubsan
 
 #endif // UBSAN_TYPE_HASH_H