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diff --git a/include/llvm/PassRegistry.h b/include/llvm/PassRegistry.h
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+++ b/include/llvm/PassRegistry.h
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+//===- llvm/PassRegistry.h - Pass Information Registry ----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines PassRegistry, a class that is used in the initialization
+// and registration of passes.  At initialization, passes are registered with
+// the PassRegistry, which is later provided to the PassManager for dependency
+// resolution and similar tasks.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_PASSREGISTRY_H
+#define LLVM_PASSREGISTRY_H
+
+#include "llvm/ADT/StringMap.h"
+#include "llvm/System/DataTypes.h"
+#include "llvm/System/Mutex.h"
+#include <map>
+#include <set>
+#include <vector>
+
+namespace llvm {
+
+class PassInfo;
+struct PassRegistrationListener;
+
+class PassRegistry {
+  /// Guards the contents of this class.
+  mutable sys::SmartMutex<true> Lock;
+  
+  /// PassInfoMap - Keep track of the PassInfo object for each registered pass.
+  typedef std::map<const void*, const PassInfo*> MapType;
+  MapType PassInfoMap;
+  
+  typedef StringMap<const PassInfo*> StringMapType;
+  StringMapType PassInfoStringMap;
+  
+  /// AnalysisGroupInfo - Keep track of information for each analysis group.
+  struct AnalysisGroupInfo {
+    std::set<const PassInfo *> Implementations;
+  };
+  std::map<const PassInfo*, AnalysisGroupInfo> AnalysisGroupInfoMap;
+  
+  std::vector<PassRegistrationListener*> Listeners;
+
+public:
+  static PassRegistry *getPassRegistry();
+  
+  const PassInfo *getPassInfo(const void *TI) const;
+  const PassInfo *getPassInfo(StringRef Arg) const;
+  
+  void registerPass(const PassInfo &PI);
+  void unregisterPass(const PassInfo &PI);
+  
+  /// Analysis Group Mechanisms.
+  void registerAnalysisGroup(const void *InterfaceID, const void *PassID,
+                             PassInfo& Registeree, bool isDefault);
+  
+  void enumerateWith(PassRegistrationListener *L);
+  void addRegistrationListener(PassRegistrationListener* L);
+  void removeRegistrationListener(PassRegistrationListener *L);
+};
+
+}
+
+#endif