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diff --git a/clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.h b/clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.h
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+++ b/clang-tools-extra/clang-tidy/bugprone/SizeofExpressionCheck.h
@@ -0,0 +1,40 @@
+//===--- SizeofExpressionCheck.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_BUGPRONE_SIZEOFEXPRESSIONCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_SIZEOFEXPRESSIONCHECK_H
+
+#include "../ClangTidy.h"
+
+namespace clang {
+namespace tidy {
+namespace bugprone {
+
+/// Find suspicious usages of sizeof expression.
+///
+/// For the user-facing documentation see:
+/// http://clang.llvm.org/extra/clang-tidy/checks/bugprone-sizeof-expression.html
+class SizeofExpressionCheck : public ClangTidyCheck {
+public:
+  SizeofExpressionCheck(StringRef Name, ClangTidyContext *Context);
+  void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
+  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
+  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+
+private:
+  const bool WarnOnSizeOfConstant;
+  const bool WarnOnSizeOfThis;
+  const bool WarnOnSizeOfCompareToConstant;
+};
+
+} // namespace bugprone
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_BUGPRONE_SIZEOFEXPRESSIONCHECK_H