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diff --git a/include/llvm/GVMaterializer.h b/include/llvm/GVMaterializer.h
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+++ b/include/llvm/GVMaterializer.h
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+//===-- llvm/GVMaterializer.h - Interface for GV materializers --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file provides an abstract interface for loading a module from some
+// place.  This interface allows incremental or random access loading of
+// functions from the file.  This is useful for applications like JIT compilers
+// or interprocedural optimizers that do not need the entire program in memory
+// at the same time.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef GVMATERIALIZER_H
+#define GVMATERIALIZER_H
+
+#include <string>
+
+namespace llvm {
+
+class Function;
+class GlobalValue;
+class Module;
+
+class GVMaterializer {
+protected:
+  GVMaterializer() {}
+
+public:
+  virtual ~GVMaterializer();
+
+  /// isMaterializable - True if GV can be materialized from whatever backing
+  /// store this GVMaterializer uses and has not been materialized yet.
+  virtual bool isMaterializable(const GlobalValue *GV) const = 0;
+
+  /// isDematerializable - True if GV has been materialized and can be
+  /// dematerialized back to whatever backing store this GVMaterializer uses.
+  virtual bool isDematerializable(const GlobalValue *GV) const = 0;
+
+  /// Materialize - make sure the given GlobalValue is fully read.  If the
+  /// module is corrupt, this returns true and fills in the optional string with
+  /// information about the problem.  If successful, this returns false.
+  ///
+  virtual bool Materialize(GlobalValue *GV, std::string *ErrInfo = 0) = 0;
+
+  /// Dematerialize - If the given GlobalValue is read in, and if the
+  /// GVMaterializer supports it, release the memory for the GV, and set it up
+  /// to be materialized lazily.  If the Materializer doesn't support this
+  /// capability, this method is a noop.
+  ///
+  virtual void Dematerialize(GlobalValue *) {}
+
+  /// MaterializeModule - make sure the entire Module has been completely read.
+  /// On error, this returns true and fills in the optional string with
+  /// information about the problem.  If successful, this returns false.
+  ///
+  virtual bool MaterializeModule(Module *M, std::string *ErrInfo = 0) = 0;
+};
+
+} // End llvm namespace
+
+#endif