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diff --git a/contrib/llvm-project/lldb/source/Plugins/ExpressionParser/Clang/ClangUtilityFunction.h b/contrib/llvm-project/lldb/source/Plugins/ExpressionParser/Clang/ClangUtilityFunction.h
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+//===-- ClangUtilityFunction.h ----------------------------------*- 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 LLDB_SOURCE_PLUGINS_EXPRESSIONPARSER_CLANG_CLANGUTILITYFUNCTION_H
+#define LLDB_SOURCE_PLUGINS_EXPRESSIONPARSER_CLANG_CLANGUTILITYFUNCTION_H
+
+#include <map>
+#include <string>
+#include <vector>
+
+#include "ClangExpressionHelper.h"
+
+#include "lldb/Expression/UtilityFunction.h"
+#include "lldb/lldb-forward.h"
+#include "lldb/lldb-private.h"
+
+namespace lldb_private {
+
+/// \class ClangUtilityFunction ClangUtilityFunction.h
+/// "lldb/Expression/ClangUtilityFunction.h" Encapsulates a single expression
+/// for use with Clang
+///
+/// LLDB uses expressions for various purposes, notably to call functions
+/// and as a backend for the expr command.  ClangUtilityFunction encapsulates
+/// a self-contained function meant to be used from other code.  Utility
+/// functions can perform error-checking for ClangUserExpressions, or can
+/// simply provide a way to push a function into the target for the debugger
+/// to call later on.
+class ClangUtilityFunction : public UtilityFunction {
+  // LLVM RTTI support
+  static char ID;
+
+public:
+  bool isA(const void *ClassID) const override {
+    return ClassID == &ID || UtilityFunction::isA(ClassID);
+  }
+  static bool classof(const Expression *obj) { return obj->isA(&ID); }
+
+  /// Constructor
+  ///
+  /// \param[in] text
+  ///     The text of the function.  Must be a full translation unit.
+  ///
+  /// \param[in] name
+  ///     The name of the function, as used in the text.
+  ///
+  /// \param[in] enable_debugging
+  ///     Enable debugging of this function.
+  ClangUtilityFunction(ExecutionContextScope &exe_scope, std::string text,
+                       std::string name, bool enable_debugging);
+
+  ~ClangUtilityFunction() override;
+
+  ExpressionTypeSystemHelper *GetTypeSystemHelper() override {
+    return &m_type_system_helper;
+  }
+
+  ClangExpressionDeclMap *DeclMap() { return m_type_system_helper.DeclMap(); }
+
+  void ResetDeclMap() { m_type_system_helper.ResetDeclMap(); }
+
+  void ResetDeclMap(ExecutionContext &exe_ctx, bool keep_result_in_memory) {
+    m_type_system_helper.ResetDeclMap(exe_ctx, keep_result_in_memory);
+  }
+
+  bool Install(DiagnosticManager &diagnostic_manager,
+               ExecutionContext &exe_ctx) override;
+
+private:
+  class ClangUtilityFunctionHelper
+      : public llvm::RTTIExtends<ClangUtilityFunctionHelper,
+                                 ClangExpressionHelper> {
+  public:
+    // LLVM RTTI support
+    static char ID;
+
+    /// Return the object that the parser should use when resolving external
+    /// values.  May be NULL if everything should be self-contained.
+    ClangExpressionDeclMap *DeclMap() override {
+      return m_expr_decl_map_up.get();
+    }
+
+    void ResetDeclMap() { m_expr_decl_map_up.reset(); }
+
+    void ResetDeclMap(ExecutionContext &exe_ctx, bool keep_result_in_memory);
+
+    /// Return the object that the parser should allow to access ASTs. May be
+    /// nullptr if the ASTs do not need to be transformed.
+    ///
+    /// \param[in] passthrough
+    ///     The ASTConsumer that the returned transformer should send
+    ///     the ASTs to after transformation.
+    clang::ASTConsumer *
+    ASTTransformer(clang::ASTConsumer *passthrough) override {
+      return nullptr;
+    }
+
+  private:
+    std::unique_ptr<ClangExpressionDeclMap> m_expr_decl_map_up;
+  };
+
+  /// The map to use when parsing and materializing the expression.
+  ClangUtilityFunctionHelper m_type_system_helper;
+};
+
+} // namespace lldb_private
+
+#endif // LLDB_SOURCE_PLUGINS_EXPRESSIONPARSER_CLANG_CLANGUTILITYFUNCTION_H