diff --git a/docs/SourceLevelDebugging.html b/docs/SourceLevelDebugging.html
index 4a55a1c..263f40c 100644
--- a/docs/SourceLevelDebugging.html
+++ b/docs/SourceLevelDebugging.html
@@ -378,6 +378,7 @@
     sbyte*, ;; Source file name
     sbyte*, ;; Source file directory (includes trailing slash)
     sbyte*  ;; Producer (ex. "4.0.1 LLVM (LLVM research group)")
+    bool    ;; True if this is a main compile unit. 
   }
 </pre>
 
@@ -392,6 +393,14 @@
 using this context.  Compile unit descriptors also provide context for source
 line correspondence.</p>  
 
+<p> Each input file is encoded as a separate compile unit in LLVM debugging
+information output. However, many target specific tool chains prefer to encode
+only one compile unit in an object file. In this situation, the LLVM code
+generator will include  debugging information entities in the compile unit 
+that is marked as main compile unit. The code generator accepts maximum one main
+compile unit per module. If a module does not contain any main compile unit 
+then the code generator will emit multiple compile units in the output object 
+file.
 </div>
 
 <!-- ======================================================================= -->
diff --git a/include/llvm/Analysis/DebugInfo.h b/include/llvm/Analysis/DebugInfo.h
index 310c1ac..5113d5f 100644
--- a/include/llvm/Analysis/DebugInfo.h
+++ b/include/llvm/Analysis/DebugInfo.h
@@ -109,8 +109,18 @@
     std::string getFilename() const  { return getStringField(3); }
     std::string getDirectory() const { return getStringField(4); }
     std::string getProducer() const  { return getStringField(5); }
-    bool isOptimized() const         { return getUnsignedField(6); }
-    std::string getFlags() const     { return getStringField(7); }
+    
+    /// isMain - Each input file is encoded as a separate compile unit in LLVM
+    /// debugging information output. However, many target specific tool chains
+    /// prefer to encode only one compile unit in an object file. In this 
+    /// situation, the LLVM code generator will include  debugging information
+    /// entities in the compile unit that is marked as main compile unit. The 
+    /// code generator accepts maximum one main compile unit per module. If a
+    /// module does not contain any main compile unit then the code generator 
+    /// will emit multiple compile units in the output object file.
+    bool isMain() const             { return getUnsignedField(6); }
+    bool isOptimized() const         { return getUnsignedField(7); }
+    std::string getFlags() const     { return getStringField(8); }
 
     /// Verify - Verify that a compile unit is well formed.
     bool Verify() const;
@@ -183,16 +193,6 @@
     bool isProtected() const            { return (getFlags() & FlagProtected) != 0; }
     bool isForwardDecl() const          { return (getFlags() & FlagFwdDecl) != 0; }
 
-    virtual std::string getFilename() const { 
-      assert (0 && "Invalid DIDescriptor");
-      return "";
-    }
-
-    virtual std::string getDirectory() const { 
-      assert (0 && "Invalid DIDescriptor");
-      return "";
-    }
-
     /// dump - print type.
     void dump() const;
   };
@@ -201,10 +201,7 @@
   class DIBasicType : public DIType {
   public:
     explicit DIBasicType(GlobalVariable *GV);
-
     unsigned getEncoding() const { return getUnsignedField(9); }
-    std::string getFilename() const { return getStringField(10); }
-    std::string getDirectory() const { return getStringField(11); }
 
     /// dump - print basic type.
     void dump() const;
@@ -218,10 +215,7 @@
       : DIType(GV, true, true) {}
   public:
     explicit DIDerivedType(GlobalVariable *GV);
-
     DIType getTypeDerivedFrom() const { return getFieldAs<DIType>(9); }
-    std::string getFilename() const { return getStringField(10); }
-    std::string getDirectory() const { return getStringField(11); }
 
     /// dump - print derived type.
     void dump() const;
@@ -233,10 +227,7 @@
   class DICompositeType : public DIDerivedType {
   public:
     explicit DICompositeType(GlobalVariable *GV);
-
     DIArray getTypeArray() const { return getFieldAs<DIArray>(10); }
-    std::string getFilename() const { return getStringField(11); }
-    std::string getDirectory() const { return getStringField(12); }
 
     /// Verify - Verify that a composite type descriptor is well formed.
     bool Verify() const;
@@ -279,16 +270,6 @@
     unsigned isLocalToUnit() const      { return getUnsignedField(9); }
     unsigned isDefinition() const       { return getUnsignedField(10); }
 
-    virtual std::string getFilename() const { 
-      assert (0 && "Invalid DIDescriptor");
-      return "";
-    }
-
-    virtual std::string getDirectory() const { 
-      assert (0 && "Invalid DIDescriptor");
-      return "";
-    }
-    
     /// dump - print global.
     void dump() const;
   };
@@ -297,8 +278,6 @@
   class DISubprogram : public DIGlobal {
   public:
     explicit DISubprogram(GlobalVariable *GV = 0);
-    std::string getFilename() const { return getStringField(11); }
-    std::string getDirectory() const { return getStringField(12); }
     DICompositeType getType() const { return getFieldAs<DICompositeType>(8); }
 
     /// Verify - Verify that a subprogram descriptor is well formed.
@@ -312,10 +291,7 @@
   class DIGlobalVariable : public DIGlobal {
   public:
     explicit DIGlobalVariable(GlobalVariable *GV = 0);
-
     GlobalVariable *getGlobal() const { return getGlobalVariableField(11); }
-    std::string getFilename() const { return getStringField(12); }
-    std::string getDirectory() const { return getStringField(13); }
 
     /// Verify - Verify that a global variable descriptor is well formed.
     bool Verify() const;
@@ -335,8 +311,6 @@
     DICompileUnit getCompileUnit() const{ return getFieldAs<DICompileUnit>(3); }
     unsigned getLineNumber() const      { return getUnsignedField(4); }
     DIType getType() const              { return getFieldAs<DIType>(5); }
-    std::string getFilename() const { return getStringField(6); }
-    std::string getDirectory() const { return getStringField(7); }
 
     /// isVariable - Return true if the specified tag is legal for DIVariable.
     static bool isVariable(unsigned Tag);
@@ -402,6 +376,7 @@
                                     const std::string &Filename,
                                     const std::string &Directory,
                                     const std::string &Producer,
+                                    bool isMain = false,
                                     bool isOptimized = false,
                                     const char *Flags = "");
 
@@ -413,9 +388,7 @@
                                 DICompileUnit CompileUnit, unsigned LineNumber,
                                 uint64_t SizeInBits, uint64_t AlignInBits,
                                 uint64_t OffsetInBits, unsigned Flags,
-                                unsigned Encoding,
-                                const std::string *FileName = 0,
-                                const std::string *Directory = 0);
+                                unsigned Encoding);
 
     /// CreateDerivedType - Create a derived type like const qualified type,
     /// pointer, typedef, etc.
@@ -425,9 +398,7 @@
                                     unsigned LineNumber,
                                     uint64_t SizeInBits, uint64_t AlignInBits,
                                     uint64_t OffsetInBits, unsigned Flags,
-                                    DIType DerivedFrom,
-                                    const std::string *FileName = 0,
-                                    const std::string *Directory = 0);
+                                    DIType DerivedFrom);
 
     /// CreateCompositeType - Create a composite type like array, struct, etc.
     DICompositeType CreateCompositeType(unsigned Tag, DIDescriptor Context,
@@ -438,9 +409,7 @@
                                         uint64_t AlignInBits,
                                         uint64_t OffsetInBits, unsigned Flags,
                                         DIType DerivedFrom,
-                                        DIArray Elements,
-                                        const std::string *FileName = 0,
-                                        const std::string *Directory = 0);
+                                        DIArray Elements);
 
     /// CreateSubprogram - Create a new descriptor for the specified subprogram.
     /// See comments in DISubprogram for descriptions of these fields.
@@ -449,9 +418,7 @@
                                   const std::string &LinkageName,
                                   DICompileUnit CompileUnit, unsigned LineNo,
                                   DIType Type, bool isLocalToUnit,
-                                  bool isDefinition,
-                                  const std::string *FileName = 0,
-                                  const std::string *Directory = 0);
+                                  bool isDefinition);
 
     /// CreateGlobalVariable - Create a new descriptor for the specified global.
     DIGlobalVariable
@@ -460,17 +427,13 @@
                          const std::string &LinkageName, 
                          DICompileUnit CompileUnit,
                          unsigned LineNo, DIType Type, bool isLocalToUnit,
-                         bool isDefinition, llvm::GlobalVariable *GV,
-                         const std::string *FileName = 0,
-                         const std::string *Directory = 0);
+                         bool isDefinition, llvm::GlobalVariable *GV);
 
     /// CreateVariable - Create a new descriptor for the specified variable.
     DIVariable CreateVariable(unsigned Tag, DIDescriptor Context,
                               const std::string &Name,
                               DICompileUnit CompileUnit, unsigned LineNo,
-                              DIType Type,
-                              const std::string *FileName = 0,
-                              const std::string *Directory = 0);
+                              DIType Type);
 
     /// CreateBlock - This creates a descriptor for a lexical block with the
     /// specified parent context.
diff --git a/lib/Analysis/DebugInfo.cpp b/lib/Analysis/DebugInfo.cpp
index e5bbbd5..0ec8089 100644
--- a/lib/Analysis/DebugInfo.cpp
+++ b/lib/Analysis/DebugInfo.cpp
@@ -442,6 +442,7 @@
                                            const std::string &Filename,
                                            const std::string &Directory,
                                            const std::string &Producer,
+                                           bool isMain,
                                            bool isOptimized,
                                            const char *Flags) {
   Constant *Elts[] = {
@@ -451,6 +452,7 @@
     GetStringConstant(Filename),
     GetStringConstant(Directory),
     GetStringConstant(Producer),
+    ConstantInt::get(Type::Int1Ty, isMain),
     ConstantInt::get(Type::Int1Ty, isOptimized),
     GetStringConstant(Flags)
   };
@@ -492,9 +494,7 @@
                                        uint64_t SizeInBits,
                                        uint64_t AlignInBits,
                                        uint64_t OffsetInBits, unsigned Flags,
-                                       unsigned Encoding,
-                                       const std::string *FileName,
-                                       const std::string *Directory) {
+                                       unsigned Encoding) {
   Constant *Elts[] = {
     GetTagConstant(dwarf::DW_TAG_base_type),
     getCastToEmpty(Context),
@@ -505,9 +505,7 @@
     ConstantInt::get(Type::Int64Ty, AlignInBits),
     ConstantInt::get(Type::Int64Ty, OffsetInBits),
     ConstantInt::get(Type::Int32Ty, Flags),
-    ConstantInt::get(Type::Int32Ty, Encoding),
-    GetStringConstant(FileName ? FileName->c_str() : ""),
-    GetStringConstant(Directory ? Directory->c_str() : "")
+    ConstantInt::get(Type::Int32Ty, Encoding)
   };
   
   Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
@@ -531,9 +529,7 @@
                                            uint64_t AlignInBits,
                                            uint64_t OffsetInBits,
                                            unsigned Flags,
-                                           DIType DerivedFrom,
-                                           const std::string *FileName,
-                                           const std::string *Directory) {
+                                           DIType DerivedFrom) {
   Constant *Elts[] = {
     GetTagConstant(Tag),
     getCastToEmpty(Context),
@@ -544,9 +540,7 @@
     ConstantInt::get(Type::Int64Ty, AlignInBits),
     ConstantInt::get(Type::Int64Ty, OffsetInBits),
     ConstantInt::get(Type::Int32Ty, Flags),
-    getCastToEmpty(DerivedFrom),
-    GetStringConstant(FileName ? FileName->c_str() : ""),
-    GetStringConstant(Directory ? Directory->c_str() : "")
+    getCastToEmpty(DerivedFrom)
   };
   
   Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
@@ -570,9 +564,7 @@
                                                uint64_t OffsetInBits,
                                                unsigned Flags,
                                                DIType DerivedFrom,
-                                               DIArray Elements,
-                                               const std::string *FileName,
-                                               const std::string *Directory) {
+                                               DIArray Elements) {
 
   Constant *Elts[] = {
     GetTagConstant(Tag),
@@ -585,9 +577,7 @@
     ConstantInt::get(Type::Int64Ty, OffsetInBits),
     ConstantInt::get(Type::Int32Ty, Flags),
     getCastToEmpty(DerivedFrom),
-    getCastToEmpty(Elements),
-    GetStringConstant(FileName ? FileName->c_str() : ""),
-    GetStringConstant(Directory ? Directory->c_str() : "")
+    getCastToEmpty(Elements)
   };
   
   Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
@@ -611,9 +601,7 @@
                                          DICompileUnit CompileUnit,
                                          unsigned LineNo, DIType Type,
                                          bool isLocalToUnit,
-                                         bool isDefinition,
-                                         const std::string *FileName,
-                                         const std::string *Directory) {
+                                         bool isDefinition) {
 
   Constant *Elts[] = {
     GetTagConstant(dwarf::DW_TAG_subprogram),
@@ -626,9 +614,7 @@
     ConstantInt::get(Type::Int32Ty, LineNo),
     getCastToEmpty(Type),
     ConstantInt::get(Type::Int1Ty, isLocalToUnit),
-    ConstantInt::get(Type::Int1Ty, isDefinition),
-    GetStringConstant(FileName ? FileName->c_str() : ""),
-    GetStringConstant(Directory ? Directory->c_str() : "")
+    ConstantInt::get(Type::Int1Ty, isDefinition)
   };
   
   Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
@@ -648,9 +634,7 @@
                                 const std::string &LinkageName,
                                 DICompileUnit CompileUnit,
                                 unsigned LineNo, DIType Type,bool isLocalToUnit,
-                                bool isDefinition, llvm::GlobalVariable *Val,
-                                const std::string *FileName,
-                                const std::string *Directory) {
+                                bool isDefinition, llvm::GlobalVariable *Val) {
   Constant *Elts[] = {
     GetTagConstant(dwarf::DW_TAG_variable),
     getCastToEmpty(GetOrCreateGlobalVariableAnchor()),
@@ -663,9 +647,7 @@
     getCastToEmpty(Type),
     ConstantInt::get(Type::Int1Ty, isLocalToUnit),
     ConstantInt::get(Type::Int1Ty, isDefinition),
-    ConstantExpr::getBitCast(Val, EmptyStructPtr),
-    GetStringConstant(FileName ? FileName->c_str() : ""),
-    GetStringConstant(Directory ? Directory->c_str() : "")
+    ConstantExpr::getBitCast(Val, EmptyStructPtr)
   };
   
   Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
@@ -683,20 +665,14 @@
 DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
                                      const std::string &Name,
                                      DICompileUnit CompileUnit, unsigned LineNo,
-                                     DIType Type,
-                                     const std::string *FileName,
-                                     const std::string *Directory) {
-
-  
+                                     DIType Type) {
   Constant *Elts[] = {
     GetTagConstant(Tag),
     getCastToEmpty(Context),
     GetStringConstant(Name),
     getCastToEmpty(CompileUnit),
     ConstantInt::get(Type::Int32Ty, LineNo),
-    getCastToEmpty(Type),
-    GetStringConstant(FileName ? FileName->c_str() : ""),
-    GetStringConstant(Directory ? Directory->c_str() : "")
+    getCastToEmpty(Type)
   };
   
   Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
diff --git a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
index b2a52ca..95990cf 100644
--- a/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfWriter.cpp
@@ -1274,6 +1274,9 @@
   /// of each entry in this vector corresponds to the sources in MMI.
   DenseMap<Value *, CompileUnit *> DW_CUs;
 
+  /// MainCU - Some platform prefers one compile unit per .o file. In such
+  /// cases, all dies are inserted in MainCU.
+  CompileUnit *MainCU;
   /// AbbreviationsSet - Used to uniquely define abbreviations.
   ///
   FoldingSet<DIEAbbrev> AbbreviationsSet;
@@ -1559,16 +1562,8 @@
   void AddSourceLine(DIE *Die, const DIVariable *V) {
     unsigned FileID = 0;
     unsigned Line = V->getLineNumber();
-    if (V->getVersion() <= LLVMDebugVersion6) {
-      // Version6 or earlier. Use compile unit info to get file id.
-      CompileUnit *Unit = FindCompileUnit(V->getCompileUnit());
-      FileID = Unit->getID();
-    } else {
-      // Version7 or newer, use filename and directory info from DIVariable
-      // directly.
-      unsigned DID = Directories.idFor(V->getDirectory());
-      FileID = SrcFiles.idFor(SrcFileInfo(DID, V->getFilename()));
-    }
+    CompileUnit *Unit = FindCompileUnit(V->getCompileUnit());
+    FileID = Unit->getID();
     AddUInt(Die, DW_AT_decl_file, 0, FileID);
     AddUInt(Die, DW_AT_decl_line, 0, Line);
   }
@@ -1578,16 +1573,8 @@
   void AddSourceLine(DIE *Die, const DIGlobal *G) {
     unsigned FileID = 0;
     unsigned Line = G->getLineNumber();
-    if (G->getVersion() <= LLVMDebugVersion6) {
-      // Version6 or earlier. Use compile unit info to get file id.
-      CompileUnit *Unit = FindCompileUnit(G->getCompileUnit());
-      FileID = Unit->getID();
-    } else {
-      // Version7 or newer, use filename and directory info from DIGlobal
-      // directly.
-      unsigned DID = Directories.idFor(G->getDirectory());
-      FileID = SrcFiles.idFor(SrcFileInfo(DID, G->getFilename()));
-    }
+    CompileUnit *Unit = FindCompileUnit(G->getCompileUnit());
+    FileID = Unit->getID();
     AddUInt(Die, DW_AT_decl_file, 0, FileID);
     AddUInt(Die, DW_AT_decl_line, 0, Line);
   }
@@ -1595,16 +1582,11 @@
   void AddSourceLine(DIE *Die, const DIType *Ty) {
     unsigned FileID = 0;
     unsigned Line = Ty->getLineNumber();
-    if (Ty->getVersion() <= LLVMDebugVersion6) {
-      // Version6 or earlier. Use compile unit info to get file id.
-      CompileUnit *Unit = FindCompileUnit(Ty->getCompileUnit());
-      FileID = Unit->getID();
-    } else {
-      // Version7 or newer, use filename and directory info from DIType
-      // directly.
-      unsigned DID = Directories.idFor(Ty->getDirectory());
-      FileID = SrcFiles.idFor(SrcFileInfo(DID, Ty->getFilename()));
-    }
+    DICompileUnit CU = Ty->getCompileUnit();
+    if (CU.isNull())
+      return;
+    CompileUnit *Unit = FindCompileUnit(CU);
+    FileID = Unit->getID();
     AddUInt(Die, DW_AT_decl_file, 0, FileID);
     AddUInt(Die, DW_AT_decl_line, 0, Line);
   }
@@ -2091,7 +2073,9 @@
     DISubprogram SPD(Desc.getGV());
 
     // Get the compile unit context.
-    CompileUnit *Unit = FindCompileUnit(SPD.getCompileUnit());
+    CompileUnit *Unit = MainCU;
+    if (!Unit)
+      Unit = FindCompileUnit(SPD.getCompileUnit());
 
     // Get the subprogram die.
     DIE *SPDie = Unit->getDieMapSlotFor(SPD.getGV());
@@ -2122,7 +2106,9 @@
 
       if (SPD.getName() == MF->getFunction()->getName()) {
         // Get the compile unit context.
-        CompileUnit *Unit = FindCompileUnit(SPD.getCompileUnit());
+        CompileUnit *Unit = MainCU;
+        if (!Unit)
+          Unit = FindCompileUnit(SPD.getCompileUnit());
 
         // Get the subprogram die.
         DIE *SPDie = Unit->getDieMapSlotFor(SPD.getGV());
@@ -2294,6 +2280,15 @@
   ///
   void SizeAndOffsets() {
     // Process base compile unit.
+    if (MainCU) {
+      // Compute size of compile unit header
+      unsigned Offset = sizeof(int32_t) + // Length of Compilation Unit Info
+        sizeof(int16_t) + // DWARF version number
+        sizeof(int32_t) + // Offset Into Abbrev. Section
+        sizeof(int8_t);   // Pointer Size (in bytes)
+      SizeAndOffsetDie(MainCU->getDie(), Offset, true);
+      return;
+    }
     for (DenseMap<Value *, CompileUnit *>::iterator CI = DW_CUs.begin(),
            CE = DW_CUs.end(); CI != CE; ++CI) {
       CompileUnit *Unit = CI->second;
@@ -2315,6 +2310,8 @@
     for (DenseMap<Value *, CompileUnit *>::iterator CI = DW_CUs.begin(),
            CE = DW_CUs.end(); CI != CE; ++CI) {
       CompileUnit *Unit = CI->second;
+      if (MainCU)
+        Unit = MainCU;
       DIE *Die = Unit->getDie();
       // Emit the compile units header.
       EmitLabel("info_begin", Unit->getID());
@@ -2340,6 +2337,8 @@
       EmitLabel("info_end", Unit->getID());
       
       Asm->EOL();
+      if (MainCU)
+        return;
     }
   }
 
@@ -2639,6 +2638,8 @@
     for (DenseMap<Value *, CompileUnit *>::iterator CI = DW_CUs.begin(),
            CE = DW_CUs.end(); CI != CE; ++CI) {
       CompileUnit *Unit = CI->second;
+      if (MainCU)
+        Unit = MainCU;
 
       EmitDifference("pubnames_end", Unit->getID(),
                      "pubnames_begin", Unit->getID(), true);
@@ -2672,6 +2673,8 @@
       EmitLabel("pubnames_end", Unit->getID());
       
       Asm->EOL();
+      if (MainCU)
+        return;
     }
   }
 
@@ -2789,6 +2792,10 @@
         AddString(Die, DW_AT_APPLE_flags, DW_FORM_string, Flags);
 
       CompileUnit *Unit = new CompileUnit(ID, Die);
+      if (DIUnit.isMain()) {
+        assert (!MainCU && "Multiple main compile units are found!");
+        MainCU = Unit;
+      }
       DW_CUs[DIUnit.getGV()] = Unit;
     }
   }
@@ -2802,7 +2809,9 @@
     for (std::vector<GlobalVariable *>::iterator GVI = Result.begin(),
            GVE = Result.end(); GVI != GVE; ++GVI) {
       DIGlobalVariable DI_GV(*GVI);
-      CompileUnit *DW_Unit = FindCompileUnit(DI_GV.getCompileUnit());
+      CompileUnit *DW_Unit = MainCU;
+      if (!DW_Unit)
+        DW_Unit = FindCompileUnit(DI_GV.getCompileUnit());
 
       // Check for pre-existence.
       DIE *&Slot = DW_Unit->getDieMapSlotFor(DI_GV.getGV());
@@ -2839,7 +2848,9 @@
            RE = Result.end(); RI != RE; ++RI) {
 
       DISubprogram SP(*RI);
-      CompileUnit *Unit = FindCompileUnit(SP.getCompileUnit());
+      CompileUnit *Unit = MainCU;
+      if (!Unit)
+        Unit = FindCompileUnit(SP.getCompileUnit());
 
       // Check for pre-existence.
       DIE *&Slot = Unit->getDieMapSlotFor(SP.getGV());
@@ -2862,6 +2873,7 @@
   //
   DwarfDebug(raw_ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
   : Dwarf(OS, A, T, "dbg")
+  , MainCU(NULL)
   , AbbreviationsSet(InitAbbreviationsSetSize)
   , Abbreviations()
   , ValuesSet(InitValuesSetSize)
diff --git a/test/DebugInfo/2009-01-29-HeaderLocation.ll b/test/DebugInfo/2009-01-29-HeaderLocation.ll
new file mode 100644
index 0000000..c59a1c7
--- /dev/null
+++ b/test/DebugInfo/2009-01-29-HeaderLocation.ll
@@ -0,0 +1,46 @@
+; RUN: llvm-as < %s | llc | grep "m.h" | count 1
+target triple = "i386-apple-darwin9.6"
+	%llvm.dbg.anchor.type = type { i32, i32 }
+	%llvm.dbg.basictype.type = type { i32, { }*, i8*, { }*, i32, i64, i64, i64, i32, i32 }
+	%llvm.dbg.compile_unit.type = type { i32, { }*, i32, i8*, i8*, i8*, i1, i1, i8* }
+	%llvm.dbg.composite.type = type { i32, { }*, i8*, { }*, i32, i64, i64, i64, i32, { }*, { }* }
+	%llvm.dbg.subprogram.type = type { i32, { }*, { }*, i8*, i8*, i8*, { }*, i32, { }*, i1, i1 }
+@llvm.dbg.compile_units = linkonce constant %llvm.dbg.anchor.type { i32 458752, i32 17 }, section "llvm.metadata"		; <%llvm.dbg.anchor.type*> [#uses=1]
+@.str = internal constant [4 x i8] c"m.c\00", section "llvm.metadata"		; <[4 x i8]*> [#uses=1]
+@.str1 = internal constant [26 x i8] c"/Volumes/Nanpura/dbg.test\00", section "llvm.metadata"		; <[26 x i8]*> [#uses=1]
+@.str2 = internal constant [52 x i8] c"4.2.1 (Based on Apple Inc. build 5636) (LLVM build)\00", section "llvm.metadata"		; <[52 x i8]*> [#uses=1]
+@llvm.dbg.compile_unit = internal constant %llvm.dbg.compile_unit.type { i32 458769, { }* bitcast (%llvm.dbg.anchor.type* @llvm.dbg.compile_units to { }*), i32 1, i8* getelementptr ([4 x i8]* @.str, i32 0, i32 0), i8* getelementptr ([26 x i8]* @.str1, i32 0, i32 0), i8* getelementptr ([52 x i8]* @.str2, i32 0, i32 0), i1 true, i1 false, i8* null }, section "llvm.metadata"		; <%llvm.dbg.compile_unit.type*> [#uses=1]
+@.str3 = internal constant [4 x i8] c"int\00", section "llvm.metadata"		; <[4 x i8]*> [#uses=1]
+@llvm.dbg.basictype = internal constant %llvm.dbg.basictype.type { i32 458788, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i8* getelementptr ([4 x i8]* @.str3, i32 0, i32 0), { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i32 0, i64 32, i64 32, i64 0, i32 0, i32 5 }, section "llvm.metadata"		; <%llvm.dbg.basictype.type*> [#uses=1]
+@llvm.dbg.array = internal constant [1 x { }*] [ { }* bitcast (%llvm.dbg.basictype.type* @llvm.dbg.basictype to { }*) ], section "llvm.metadata"		; <[1 x { }*]*> [#uses=1]
+@llvm.dbg.composite = internal constant %llvm.dbg.composite.type { i32 458773, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i8* null, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i32 0, i64 0, i64 0, i64 0, i32 0, { }* null, { }* bitcast ([1 x { }*]* @llvm.dbg.array to { }*) }, section "llvm.metadata"		; <%llvm.dbg.composite.type*> [#uses=1]
+@.str4 = internal constant [4 x i8] c"m.h\00", section "llvm.metadata"		; <[4 x i8]*> [#uses=1]
+@llvm.dbg.compile_unit5 = internal constant %llvm.dbg.compile_unit.type { i32 458769, { }* bitcast (%llvm.dbg.anchor.type* @llvm.dbg.compile_units to { }*), i32 1, i8* getelementptr ([4 x i8]* @.str4, i32 0, i32 0), i8* getelementptr ([26 x i8]* @.str1, i32 0, i32 0), i8* getelementptr ([52 x i8]* @.str2, i32 0, i32 0), i1 false, i1 false, i8* null }, section "llvm.metadata"		; <%llvm.dbg.compile_unit.type*> [#uses=1]
+@llvm.dbg.subprograms = linkonce constant %llvm.dbg.anchor.type { i32 458752, i32 46 }, section "llvm.metadata"		; <%llvm.dbg.anchor.type*> [#uses=1]
+@.str6 = internal constant [5 x i8] c"main\00", section "llvm.metadata"		; <[5 x i8]*> [#uses=1]
+@llvm.dbg.subprogram = internal constant %llvm.dbg.subprogram.type { i32 458798, { }* bitcast (%llvm.dbg.anchor.type* @llvm.dbg.subprograms to { }*), { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*), i8* getelementptr ([5 x i8]* @.str6, i32 0, i32 0), i8* getelementptr ([5 x i8]* @.str6, i32 0, i32 0), i8* null, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit5 to { }*), i32 2, { }* bitcast (%llvm.dbg.composite.type* @llvm.dbg.composite to { }*), i1 false, i1 true }, section "llvm.metadata"		; <%llvm.dbg.subprogram.type*> [#uses=1]
+
+define i32 @main() nounwind {
+entry:
+	%retval = alloca i32		; <i32*> [#uses=2]
+	%0 = alloca i32		; <i32*> [#uses=2]
+	%"alloca point" = bitcast i32 0 to i32		; <i32> [#uses=0]
+	call void @llvm.dbg.func.start({ }* bitcast (%llvm.dbg.subprogram.type* @llvm.dbg.subprogram to { }*))
+	call void @llvm.dbg.stoppoint(i32 2, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit5 to { }*))
+	store i32 0, i32* %0, align 4
+	%1 = load i32* %0, align 4		; <i32> [#uses=1]
+	store i32 %1, i32* %retval, align 4
+	br label %return
+
+return:		; preds = %entry
+	%retval1 = load i32* %retval		; <i32> [#uses=1]
+	call void @llvm.dbg.stoppoint(i32 2, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit5 to { }*))
+	call void @llvm.dbg.region.end({ }* bitcast (%llvm.dbg.subprogram.type* @llvm.dbg.subprogram to { }*))
+	ret i32 %retval1
+}
+
+declare void @llvm.dbg.func.start({ }*) nounwind
+
+declare void @llvm.dbg.stoppoint(i32, i32, { }*) nounwind
+
+declare void @llvm.dbg.region.end({ }*) nounwind