diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 440099f..e9bfff3 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -14,6 +14,7 @@
 #define DEBUG_TYPE "dwarfdebug"
 #include "DwarfDebug.h"
 #include "DIE.h"
+#include "DwarfCompileUnit.h"
 #include "llvm/Constants.h"
 #include "llvm/Module.h"
 #include "llvm/Instructions.h"
@@ -73,104 +74,6 @@
 namespace llvm {
 
 //===----------------------------------------------------------------------===//
-/// CompileUnit - This dwarf writer support class manages information associate
-/// with a source file.
-class CompileUnit {
-  /// ID - File identifier for source.
-  ///
-  unsigned ID;
-
-  /// Die - Compile unit debug information entry.
-  ///
-  const OwningPtr<DIE> CUDie;
-
-  /// IndexTyDie - An anonymous type for index type.  Owned by CUDie.
-  DIE *IndexTyDie;
-
-  /// MDNodeToDieMap - Tracks the mapping of unit level debug informaton
-  /// variables to debug information entries.
-  DenseMap<const MDNode *, DIE *> MDNodeToDieMap;
-
-  /// MDNodeToDIEEntryMap - Tracks the mapping of unit level debug informaton
-  /// descriptors to debug information entries using a DIEEntry proxy.
-  DenseMap<const MDNode *, DIEEntry *> MDNodeToDIEEntryMap;
-
-  /// Globals - A map of globally visible named entities for this unit.
-  ///
-  StringMap<DIE*> Globals;
-
-  /// GlobalTypes - A map of globally visible types for this unit.
-  ///
-  StringMap<DIE*> GlobalTypes;
-
-public:
-  CompileUnit(unsigned I, DIE *D)
-    : ID(I), CUDie(D), IndexTyDie(0) {}
-
-  // Accessors.
-  unsigned getID()                  const { return ID; }
-  DIE* getCUDie()                   const { return CUDie.get(); }
-  const StringMap<DIE*> &getGlobals()     const { return Globals; }
-  const StringMap<DIE*> &getGlobalTypes() const { return GlobalTypes; }
-
-  /// hasContent - Return true if this compile unit has something to write out.
-  ///
-  bool hasContent() const { return !CUDie->getChildren().empty(); }
-
-  /// addGlobal - Add a new global entity to the compile unit.
-  ///
-  void addGlobal(StringRef Name, DIE *Die) { Globals[Name] = Die; }
-
-  /// addGlobalType - Add a new global type to the compile unit.
-  ///
-  void addGlobalType(StringRef Name, DIE *Die) {
-    GlobalTypes[Name] = Die;
-  }
-
-  /// getDIE - Returns the debug information entry map slot for the
-  /// specified debug variable.
-  DIE *getDIE(const MDNode *N) { return MDNodeToDieMap.lookup(N); }
-
-  /// insertDIE - Insert DIE into the map.
-  void insertDIE(const MDNode *N, DIE *D) {
-    MDNodeToDieMap.insert(std::make_pair(N, D));
-  }
-
-  /// getDIEEntry - Returns the debug information entry for the speciefied
-  /// debug variable.
-  DIEEntry *getDIEEntry(const MDNode *N) {
-    DenseMap<const MDNode *, DIEEntry *>::iterator I =
-      MDNodeToDIEEntryMap.find(N);
-    if (I == MDNodeToDIEEntryMap.end())
-      return NULL;
-    return I->second;
-  }
-
-  /// insertDIEEntry - Insert debug information entry into the map.
-  void insertDIEEntry(const MDNode *N, DIEEntry *E) {
-    MDNodeToDIEEntryMap.insert(std::make_pair(N, E));
-  }
-
-  /// addDie - Adds or interns the DIE to the compile unit.
-  ///
-  void addDie(DIE *Buffer) {
-    this->CUDie->addChild(Buffer);
-  }
-
-  // getIndexTyDie - Get an anonymous type for index type.
-  DIE *getIndexTyDie() {
-    return IndexTyDie;
-  }
-
-  // setIndexTyDie - Set D as anonymous type for index which can be reused
-  // later.
-  void setIndexTyDie(DIE *D) {
-    IndexTyDie = D;
-  }
-
-};
-
-//===----------------------------------------------------------------------===//
 /// DbgVariable - This class is used to track local variable information.
 ///
 class DbgVariable {