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diff --git a/clang-tools-extra/clang-tidy/utils/ExceptionAnalyzer.h b/clang-tools-extra/clang-tidy/utils/ExceptionAnalyzer.h
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+++ b/clang-tools-extra/clang-tidy/utils/ExceptionAnalyzer.h
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+//===--- ExceptionAnalyzer.h - clang-tidy -----------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_EXCEPTION_ANALYZER_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_EXCEPTION_ANALYZER_H
+
+#include "clang/AST/ASTContext.h"
+#include "llvm/ADT/SmallSet.h"
+#include "llvm/ADT/StringSet.h"
+
+namespace clang {
+namespace tidy {
+namespace utils {
+
+/// This class analysis if a `FunctionDecl` can in principle throw an exception,
+/// either directly or indirectly.
+/// It can be configured to ignore custom exception types.
+class ExceptionAnalyzer {
+public:
+  ExceptionAnalyzer() = default;
+
+  bool throwsException(const FunctionDecl *Func);
+  void ignoreExceptions(llvm::StringSet<> ExceptionNames) {
+    IgnoredExceptions = std::move(ExceptionNames);
+  }
+
+private:
+  using TypeVec = llvm::SmallVector<const Type *, 8>;
+
+  TypeVec throwsException(const FunctionDecl *Func,
+                          llvm::SmallSet<const FunctionDecl *, 32> &CallStack);
+  TypeVec throwsException(const Stmt *St, const TypeVec &Caught,
+                          llvm::SmallSet<const FunctionDecl *, 32> &CallStack);
+  bool isIgnoredExceptionType(const Type *Exception);
+
+  llvm::StringSet<> IgnoredExceptions;
+  llvm::DenseMap<const FunctionDecl *, bool> FunctionCache;
+};
+} // namespace utils
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_EXCEPTION_ANALYZER_H