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diff --git a/include/llvm/ExecutionEngine/Orc/CloneSubModule.h b/include/llvm/ExecutionEngine/Orc/CloneSubModule.h
new file mode 100644
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+++ b/include/llvm/ExecutionEngine/Orc/CloneSubModule.h
@@ -0,0 +1,60 @@
+//===-- CloneSubModule.h - Utilities for extracting sub-modules -*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Contains utilities for extracting sub-modules. Useful for breaking up modules
+// for lazy jitting.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_EXECUTIONENGINE_ORC_CLONESUBMODULE_H
+#define LLVM_EXECUTIONENGINE_ORC_CLONESUBMODULE_H
+
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/Transforms/Utils/ValueMapper.h"
+#include <functional>
+
+namespace llvm {
+
+class Function;
+class GlobalVariable;
+class Module;
+
+namespace orc {
+
+/// @brief Functor type for describing how CloneSubModule should mutate a
+///        GlobalVariable.
+typedef std::function<void(GlobalVariable &, const GlobalVariable &,
+                           ValueToValueMapTy &)> HandleGlobalVariableFtor;
+
+/// @brief Functor type for describing how CloneSubModule should mutate a
+///        Function.
+typedef std::function<void(Function &, const Function &, ValueToValueMapTy &)>
+    HandleFunctionFtor;
+
+/// @brief Copies the initializer from Orig to New.
+///
+///   Type is suitable for implicit conversion to a HandleGlobalVariableFtor.
+void copyGVInitializer(GlobalVariable &New, const GlobalVariable &Orig,
+                       ValueToValueMapTy &VMap);
+
+/// @brief Copies the body of Orig to New.
+///
+///   Type is suitable for implicit conversion to a HandleFunctionFtor.
+void copyFunctionBody(Function &New, const Function &Orig,
+                      ValueToValueMapTy &VMap);
+
+/// @brief Clone a subset of the module Src into Dst.
+void CloneSubModule(Module &Dst, const Module &Src,
+                    HandleGlobalVariableFtor HandleGlobalVariable,
+                    HandleFunctionFtor HandleFunction, bool KeepInlineAsm);
+
+} // End namespace orc.
+} // End namespace llvm.
+
+#endif // LLVM_EXECUTIONENGINE_ORC_CLONESUBMODULE_H