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diff --git a/clang-tools-extra/clang-tidy/utils/HeaderGuard.h b/clang-tools-extra/clang-tidy/utils/HeaderGuard.h
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+++ b/clang-tools-extra/clang-tidy/utils/HeaderGuard.h
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+//===--- HeaderGuard.h - clang-tidy -----------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_HEADER_GUARD_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_HEADER_GUARD_H
+
+#include "../ClangTidy.h"
+
+namespace clang {
+namespace tidy {
+
+/// \brief Finds and fixes header guards.
+class HeaderGuardCheck : public ClangTidyCheck {
+public:
+  void registerPPCallbacks(CompilerInstance &Compiler) override;
+
+  /// \brief Returns true if the checker should suggest inserting a trailing
+  /// comment on the #endif of the header guard. It will use the same name as
+  /// returned by getHeaderGuard.
+  virtual bool shouldSuggestEndifComment(StringRef Filename);
+  /// \brief Returns true if the checker should suggest changing an existing
+  /// header guard to the string returned by getHeaderGuard.
+  virtual bool shouldFixHeaderGuard(StringRef Filename);
+  /// \brief Returns true if the checker should add a header guard to the file
+  /// if it has none.
+  virtual bool shouldSuggestToAddHeaderGuard(StringRef Filename);
+  /// \brief Get the canonical header guard for a file.
+  virtual std::string getHeaderGuard(StringRef Filename,
+                                     StringRef OldGuard = StringRef()) = 0;
+};
+
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_HEADER_GUARD_H