diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
new file mode 100644
index 0000000..7138bc0
--- /dev/null
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -0,0 +1,1844 @@
+//===--- CGDebugInfo.cpp - Emit Debug Information for a Module ------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This coordinates the debug information generation while generating code.
+//
+//===----------------------------------------------------------------------===//
+
+#include "CGDebugInfo.h"
+#include "CodeGenFunction.h"
+#include "CodeGenModule.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/AST/Expr.h"
+#include "clang/AST/RecordLayout.h"
+#include "clang/Basic/SourceManager.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Basic/Version.h"
+#include "clang/CodeGen/CodeGenOptions.h"
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Instructions.h"
+#include "llvm/Intrinsics.h"
+#include "llvm/Module.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/System/Path.h"
+#include "llvm/Target/TargetMachine.h"
+using namespace clang;
+using namespace clang::CodeGen;
+
+CGDebugInfo::CGDebugInfo(CodeGenModule &CGM)
+  : CGM(CGM), isMainCompileUnitCreated(false), DebugFactory(CGM.getModule()),
+    BlockLiteralGenericSet(false) {
+}
+
+CGDebugInfo::~CGDebugInfo() {
+  assert(RegionStack.empty() && "Region stack mismatch, stack not empty!");
+}
+
+void CGDebugInfo::setLocation(SourceLocation Loc) {
+  if (Loc.isValid())
+    CurLoc = CGM.getContext().getSourceManager().getInstantiationLoc(Loc);
+}
+
+/// getContextDescriptor - Get context info for the decl.
+llvm::DIDescriptor CGDebugInfo::getContextDescriptor(const Decl *Context,
+                                              llvm::DIDescriptor &CompileUnit) {
+  if (!Context)
+    return CompileUnit;
+
+  llvm::DenseMap<const Decl *, llvm::WeakVH>::iterator
+    I = RegionMap.find(Context);
+  if (I != RegionMap.end())
+    return llvm::DIDescriptor(dyn_cast_or_null<llvm::MDNode>(I->second));
+
+  // Check namespace.
+  if (const NamespaceDecl *NSDecl = dyn_cast<NamespaceDecl>(Context))
+    return llvm::DIDescriptor(getOrCreateNameSpace(NSDecl, CompileUnit));
+  
+  return CompileUnit;
+}
+
+/// getFunctionName - Get function name for the given FunctionDecl. If the
+/// name is constructred on demand (e.g. C++ destructor) then the name
+/// is stored on the side.
+llvm::StringRef CGDebugInfo::getFunctionName(const FunctionDecl *FD) {
+  assert (FD && "Invalid FunctionDecl!");
+  IdentifierInfo *FII = FD->getIdentifier();
+  if (FII)
+    return FII->getName();
+
+  // Otherwise construct human readable name for debug info.
+  std::string NS = FD->getNameAsString();
+
+  // Copy this name on the side and use its reference.
+  char *StrPtr = DebugInfoNames.Allocate<char>(NS.length());
+  memcpy(StrPtr, NS.data(), NS.length());
+  return llvm::StringRef(StrPtr, NS.length());
+}
+
+/// getOrCreateCompileUnit - Get the compile unit from the cache or create a new
+/// one if necessary. This returns null for invalid source locations.
+llvm::DICompileUnit CGDebugInfo::getOrCreateCompileUnit(SourceLocation Loc) {
+  // Get source file information.
+  const char *FileName =  "<unknown>";
+  SourceManager &SM = CGM.getContext().getSourceManager();
+  if (Loc.isValid()) {
+    PresumedLoc PLoc = SM.getPresumedLoc(Loc);
+    FileName = PLoc.getFilename();
+    unsigned FID = PLoc.getIncludeLoc().getRawEncoding();
+
+    // See if this compile unit has been used before for this valid location.
+    llvm::DICompileUnit &Unit = CompileUnitCache[FID];
+    if (!Unit.isNull()) return Unit;
+  }
+
+  // Get absolute path name.
+  llvm::sys::Path AbsFileName(FileName);
+  AbsFileName.makeAbsolute();
+
+  // See if thie compile unit is representing main source file. Each source
+  // file has corresponding compile unit. There is only one main source
+  // file at a time.
+  bool isMain = false;
+  const LangOptions &LO = CGM.getLangOptions();
+  const CodeGenOptions &CGO = CGM.getCodeGenOpts();
+  if (isMainCompileUnitCreated == false) {
+    if (!CGO.MainFileName.empty()) {
+      if (AbsFileName.getLast() == CGO.MainFileName)
+        isMain = true;
+    } else {
+      if (Loc.isValid() && SM.isFromMainFile(Loc))
+        isMain = true;
+    }
+    if (isMain)
+      isMainCompileUnitCreated = true;
+  }
+
+  unsigned LangTag;
+  if (LO.CPlusPlus) {
+    if (LO.ObjC1)
+      LangTag = llvm::dwarf::DW_LANG_ObjC_plus_plus;
+    else
+      LangTag = llvm::dwarf::DW_LANG_C_plus_plus;
+  } else if (LO.ObjC1) {
+    LangTag = llvm::dwarf::DW_LANG_ObjC;
+  } else if (LO.C99) {
+    LangTag = llvm::dwarf::DW_LANG_C99;
+  } else {
+    LangTag = llvm::dwarf::DW_LANG_C89;
+  }
+
+  const char *Producer =
+#ifdef CLANG_VENDOR
+    CLANG_VENDOR
+#endif
+    "clang " CLANG_VERSION_STRING;
+
+  // Figure out which version of the ObjC runtime we have.
+  unsigned RuntimeVers = 0;
+  if (LO.ObjC1)
+    RuntimeVers = LO.ObjCNonFragileABI ? 2 : 1;
+
+  // Create new compile unit.
+  return DebugFactory.CreateCompileUnit(
+    LangTag, AbsFileName.getLast(), AbsFileName.getDirname(), Producer, isMain,
+    LO.Optimize, CGM.getCodeGenOpts().DwarfDebugFlags, RuntimeVers);
+}
+
+/// CreateType - Get the Basic type from the cache or create a new
+/// one if necessary.
+llvm::DIType CGDebugInfo::CreateType(const BuiltinType *BT,
+                                     llvm::DICompileUnit Unit) {
+  unsigned Encoding = 0;
+  switch (BT->getKind()) {
+  default:
+  case BuiltinType::Void:
+    return llvm::DIType();
+  case BuiltinType::UChar:
+  case BuiltinType::Char_U: Encoding = llvm::dwarf::DW_ATE_unsigned_char; break;
+  case BuiltinType::Char_S:
+  case BuiltinType::SChar: Encoding = llvm::dwarf::DW_ATE_signed_char; break;
+  case BuiltinType::UShort:
+  case BuiltinType::UInt:
+  case BuiltinType::ULong:
+  case BuiltinType::ULongLong: Encoding = llvm::dwarf::DW_ATE_unsigned; break;
+  case BuiltinType::Short:
+  case BuiltinType::Int:
+  case BuiltinType::Long:
+  case BuiltinType::LongLong:  Encoding = llvm::dwarf::DW_ATE_signed; break;
+  case BuiltinType::Bool:      Encoding = llvm::dwarf::DW_ATE_boolean; break;
+  case BuiltinType::Float:
+  case BuiltinType::LongDouble:
+  case BuiltinType::Double:    Encoding = llvm::dwarf::DW_ATE_float; break;
+  }
+  // Bit size, align and offset of the type.
+  uint64_t Size = CGM.getContext().getTypeSize(BT);
+  uint64_t Align = CGM.getContext().getTypeAlign(BT);
+  uint64_t Offset = 0;
+
+  llvm::DIType DbgTy = 
+    DebugFactory.CreateBasicType(Unit,
+                                 BT->getName(CGM.getContext().getLangOptions()),
+                                 Unit, 0, Size, Align,
+                                 Offset, /*flags*/ 0, Encoding);
+  return DbgTy;
+}
+
+llvm::DIType CGDebugInfo::CreateType(const ComplexType *Ty,
+                                     llvm::DICompileUnit Unit) {
+  // Bit size, align and offset of the type.
+  unsigned Encoding = llvm::dwarf::DW_ATE_complex_float;
+  if (Ty->isComplexIntegerType())
+    Encoding = llvm::dwarf::DW_ATE_lo_user;
+
+  uint64_t Size = CGM.getContext().getTypeSize(Ty);
+  uint64_t Align = CGM.getContext().getTypeAlign(Ty);
+  uint64_t Offset = 0;
+
+  llvm::DIType DbgTy = 
+    DebugFactory.CreateBasicType(Unit, "complex",
+                                 Unit, 0, Size, Align,
+                                 Offset, /*flags*/ 0, Encoding);
+  return DbgTy;
+}
+
+/// CreateCVRType - Get the qualified type from the cache or create
+/// a new one if necessary.
+llvm::DIType CGDebugInfo::CreateQualifiedType(QualType Ty, llvm::DICompileUnit Unit) {
+  QualifierCollector Qc;
+  const Type *T = Qc.strip(Ty);
+
+  // Ignore these qualifiers for now.
+  Qc.removeObjCGCAttr();
+  Qc.removeAddressSpace();
+
+  // We will create one Derived type for one qualifier and recurse to handle any
+  // additional ones.
+  unsigned Tag;
+  if (Qc.hasConst()) {
+    Tag = llvm::dwarf::DW_TAG_const_type;
+    Qc.removeConst();
+  } else if (Qc.hasVolatile()) {
+    Tag = llvm::dwarf::DW_TAG_volatile_type;
+    Qc.removeVolatile();
+  } else if (Qc.hasRestrict()) {
+    Tag = llvm::dwarf::DW_TAG_restrict_type;
+    Qc.removeRestrict();
+  } else {
+    assert(Qc.empty() && "Unknown type qualifier for debug info");
+    return getOrCreateType(QualType(T, 0), Unit);
+  }
+
+  llvm::DIType FromTy = getOrCreateType(Qc.apply(T), Unit);
+
+  // No need to fill in the Name, Line, Size, Alignment, Offset in case of
+  // CVR derived types.
+  llvm::DIType DbgTy =
+    DebugFactory.CreateDerivedType(Tag, Unit, "", llvm::DICompileUnit(),
+                                   0, 0, 0, 0, 0, FromTy);
+  return DbgTy;
+}
+
+llvm::DIType CGDebugInfo::CreateType(const ObjCObjectPointerType *Ty,
+                                     llvm::DICompileUnit Unit) {
+  llvm::DIType DbgTy =
+    CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty, 
+                          Ty->getPointeeType(), Unit);
+  return DbgTy;
+}
+
+llvm::DIType CGDebugInfo::CreateType(const PointerType *Ty,
+                                     llvm::DICompileUnit Unit) {
+  return CreatePointerLikeType(llvm::dwarf::DW_TAG_pointer_type, Ty, 
+                               Ty->getPointeeType(), Unit);
+}
+
+llvm::DIType CGDebugInfo::CreatePointerLikeType(unsigned Tag,
+                                                const Type *Ty, 
+                                                QualType PointeeTy,
+                                                llvm::DICompileUnit Unit) {
+  llvm::DIType EltTy = getOrCreateType(PointeeTy, Unit);
+
+  // Bit size, align and offset of the type.
+  
+  // Size is always the size of a pointer. We can't use getTypeSize here
+  // because that does not return the correct value for references.
+  uint64_t Size = 
+    CGM.getContext().Target.getPointerWidth(PointeeTy.getAddressSpace());
+  uint64_t Align = CGM.getContext().getTypeAlign(Ty);
+
+  return
+    DebugFactory.CreateDerivedType(Tag, Unit, "", llvm::DICompileUnit(),
+                                   0, Size, Align, 0, 0, EltTy);
+  
+}
+
+llvm::DIType CGDebugInfo::CreateType(const BlockPointerType *Ty,
+                                     llvm::DICompileUnit Unit) {
+  if (BlockLiteralGenericSet)
+    return BlockLiteralGeneric;
+
+  llvm::DICompileUnit DefUnit;
+  unsigned Tag = llvm::dwarf::DW_TAG_structure_type;
+
+  llvm::SmallVector<llvm::DIDescriptor, 5> EltTys;
+
+  llvm::DIType FieldTy;
+
+  QualType FType;
+  uint64_t FieldSize, FieldOffset;
+  unsigned FieldAlign;
+
+  llvm::DIArray Elements;
+  llvm::DIType EltTy, DescTy;
+
+  FieldOffset = 0;
+  FType = CGM.getContext().UnsignedLongTy;
+  FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+  FieldSize = CGM.getContext().getTypeSize(FType);
+  FieldAlign = CGM.getContext().getTypeAlign(FType);
+  FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                           "reserved", DefUnit,
+                                           0, FieldSize, FieldAlign,
+                                           FieldOffset, 0, FieldTy);
+  EltTys.push_back(FieldTy);
+
+  FieldOffset += FieldSize;
+  FType = CGM.getContext().UnsignedLongTy;
+  FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+  FieldSize = CGM.getContext().getTypeSize(FType);
+  FieldAlign = CGM.getContext().getTypeAlign(FType);
+  FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                           "Size", DefUnit,
+                                           0, FieldSize, FieldAlign,
+                                           FieldOffset, 0, FieldTy);
+  EltTys.push_back(FieldTy);
+
+  FieldOffset += FieldSize;
+  Elements = DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
+  EltTys.clear();
+
+  unsigned Flags = llvm::DIType::FlagAppleBlock;
+
+  EltTy = DebugFactory.CreateCompositeType(Tag, Unit, "__block_descriptor",
+                                           DefUnit, 0, FieldOffset, 0, 0, Flags,
+                                           llvm::DIType(), Elements);
+
+  // Bit size, align and offset of the type.
+  uint64_t Size = CGM.getContext().getTypeSize(Ty);
+  uint64_t Align = CGM.getContext().getTypeAlign(Ty);
+
+  DescTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type,
+                                          Unit, "", llvm::DICompileUnit(),
+                                          0, Size, Align, 0, 0, EltTy);
+
+  FieldOffset = 0;
+  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
+  FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+  FieldSize = CGM.getContext().getTypeSize(FType);
+  FieldAlign = CGM.getContext().getTypeAlign(FType);
+  FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                           "__isa", DefUnit,
+                                           0, FieldSize, FieldAlign,
+                                           FieldOffset, 0, FieldTy);
+  EltTys.push_back(FieldTy);
+
+  FieldOffset += FieldSize;
+  FType = CGM.getContext().IntTy;
+  FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+  FieldSize = CGM.getContext().getTypeSize(FType);
+  FieldAlign = CGM.getContext().getTypeAlign(FType);
+  FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                           "__flags", DefUnit,
+                                           0, FieldSize, FieldAlign,
+                                           FieldOffset, 0, FieldTy);
+  EltTys.push_back(FieldTy);
+
+  FieldOffset += FieldSize;
+  FType = CGM.getContext().IntTy;
+  FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+  FieldSize = CGM.getContext().getTypeSize(FType);
+  FieldAlign = CGM.getContext().getTypeAlign(FType);
+  FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                           "__reserved", DefUnit,
+                                           0, FieldSize, FieldAlign,
+                                           FieldOffset, 0, FieldTy);
+  EltTys.push_back(FieldTy);
+
+  FieldOffset += FieldSize;
+  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
+  FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+  FieldSize = CGM.getContext().getTypeSize(FType);
+  FieldAlign = CGM.getContext().getTypeAlign(FType);
+  FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                           "__FuncPtr", DefUnit,
+                                           0, FieldSize, FieldAlign,
+                                           FieldOffset, 0, FieldTy);
+  EltTys.push_back(FieldTy);
+
+  FieldOffset += FieldSize;
+  FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
+  FieldTy = DescTy;
+  FieldSize = CGM.getContext().getTypeSize(Ty);
+  FieldAlign = CGM.getContext().getTypeAlign(Ty);
+  FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                           "__descriptor", DefUnit,
+                                           0, FieldSize, FieldAlign,
+                                           FieldOffset, 0, FieldTy);
+  EltTys.push_back(FieldTy);
+
+  FieldOffset += FieldSize;
+  Elements = DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
+
+  EltTy = DebugFactory.CreateCompositeType(Tag, Unit, "__block_literal_generic",
+                                           DefUnit, 0, FieldOffset, 0, 0, Flags,
+                                           llvm::DIType(), Elements);
+
+  BlockLiteralGenericSet = true;
+  BlockLiteralGeneric
+    = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type, Unit,
+                                     "", llvm::DICompileUnit(),
+                                     0, Size, Align, 0, 0, EltTy);
+  return BlockLiteralGeneric;
+}
+
+llvm::DIType CGDebugInfo::CreateType(const TypedefType *Ty,
+                                     llvm::DICompileUnit Unit) {
+  // Typedefs are derived from some other type.  If we have a typedef of a
+  // typedef, make sure to emit the whole chain.
+  llvm::DIType Src = getOrCreateType(Ty->getDecl()->getUnderlyingType(), Unit);
+
+  // We don't set size information, but do specify where the typedef was
+  // declared.
+  SourceManager &SM = CGM.getContext().getSourceManager();
+  PresumedLoc PLoc = SM.getPresumedLoc(Ty->getDecl()->getLocation());
+  unsigned Line = PLoc.isInvalid() ? 0 : PLoc.getLine();
+
+  llvm::DIDescriptor TyContext 
+    = getContextDescriptor(dyn_cast<Decl>(Ty->getDecl()->getDeclContext()),
+                           Unit);
+  llvm::DIType DbgTy = 
+    DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_typedef, 
+                                   TyContext,
+                                   Ty->getDecl()->getName(), Unit,
+                                   Line, 0, 0, 0, 0, Src);
+  return DbgTy;
+}
+
+llvm::DIType CGDebugInfo::CreateType(const FunctionType *Ty,
+                                     llvm::DICompileUnit Unit) {
+  llvm::SmallVector<llvm::DIDescriptor, 16> EltTys;
+
+  // Add the result type at least.
+  EltTys.push_back(getOrCreateType(Ty->getResultType(), Unit));
+
+  // Set up remainder of arguments if there is a prototype.
+  // FIXME: IF NOT, HOW IS THIS REPRESENTED?  llvm-gcc doesn't represent '...'!
+  if (const FunctionProtoType *FTP = dyn_cast<FunctionProtoType>(Ty)) {
+    for (unsigned i = 0, e = FTP->getNumArgs(); i != e; ++i)
+      EltTys.push_back(getOrCreateType(FTP->getArgType(i), Unit));
+  } else {
+    // FIXME: Handle () case in C.  llvm-gcc doesn't do it either.
+  }
+
+  llvm::DIArray EltTypeArray =
+    DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
+
+  llvm::DIType DbgTy =
+    DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_subroutine_type,
+                                     Unit, "", llvm::DICompileUnit(),
+                                     0, 0, 0, 0, 0,
+                                     llvm::DIType(), EltTypeArray);
+  return DbgTy;
+}
+
+/// CollectRecordFields - A helper function to collect debug info for
+/// record fields. This is used while creating debug info entry for a Record.
+void CGDebugInfo::
+CollectRecordFields(const RecordDecl *RD, llvm::DICompileUnit Unit,
+                    llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys) {
+  unsigned FieldNo = 0;
+  SourceManager &SM = CGM.getContext().getSourceManager();
+  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
+  for (RecordDecl::field_iterator I = RD->field_begin(),
+                                  E = RD->field_end();
+       I != E; ++I, ++FieldNo) {
+    FieldDecl *Field = *I;
+    llvm::DIType FieldTy = getOrCreateType(Field->getType(), Unit);
+
+    llvm::StringRef FieldName = Field->getName();
+
+    // Ignore unnamed fields.
+    if (FieldName.empty())
+      continue;
+
+    // Get the location for the field.
+    SourceLocation FieldDefLoc = Field->getLocation();
+    PresumedLoc PLoc = SM.getPresumedLoc(FieldDefLoc);
+    llvm::DICompileUnit FieldDefUnit;
+    unsigned FieldLine = 0;
+
+    if (!PLoc.isInvalid()) {
+      FieldDefUnit = getOrCreateCompileUnit(FieldDefLoc);
+      FieldLine = PLoc.getLine();
+    }
+
+    QualType FType = Field->getType();
+    uint64_t FieldSize = 0;
+    unsigned FieldAlign = 0;
+    if (!FType->isIncompleteArrayType()) {
+
+      // Bit size, align and offset of the type.
+      FieldSize = CGM.getContext().getTypeSize(FType);
+      Expr *BitWidth = Field->getBitWidth();
+      if (BitWidth)
+        FieldSize = BitWidth->EvaluateAsInt(CGM.getContext()).getZExtValue();
+
+      FieldAlign =  CGM.getContext().getTypeAlign(FType);
+    }
+
+    uint64_t FieldOffset = RL.getFieldOffset(FieldNo);
+
+    // Create a DW_TAG_member node to remember the offset of this field in the
+    // struct.  FIXME: This is an absolutely insane way to capture this
+    // information.  When we gut debug info, this should be fixed.
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             FieldName, FieldDefUnit,
+                                             FieldLine, FieldSize, FieldAlign,
+                                             FieldOffset, 0, FieldTy);
+    EltTys.push_back(FieldTy);
+  }
+}
+
+/// getOrCreateMethodType - CXXMethodDecl's type is a FunctionType. This
+/// function type is not updated to include implicit "this" pointer. Use this
+/// routine to get a method type which includes "this" pointer.
+llvm::DIType
+CGDebugInfo::getOrCreateMethodType(const CXXMethodDecl *Method,
+                                   llvm::DICompileUnit Unit) {
+  llvm::DIType FnTy = getOrCreateType(Method->getType(), Unit);
+  
+  // Static methods do not need "this" pointer argument.
+  if (Method->isStatic())
+    return FnTy;
+
+  // Add "this" pointer.
+
+  llvm::DIArray Args = llvm::DICompositeType(FnTy.getNode()).getTypeArray();
+  assert (Args.getNumElements() && "Invalid number of arguments!");
+
+  llvm::SmallVector<llvm::DIDescriptor, 16> Elts;
+
+  // First element is always return type. For 'void' functions it is NULL.
+  Elts.push_back(Args.getElement(0));
+
+  // "this" pointer is always first argument.
+  ASTContext &Context = CGM.getContext();
+  QualType ThisPtr = 
+    Context.getPointerType(Context.getTagDeclType(Method->getParent()));
+  llvm::DIType ThisPtrType = 
+    DebugFactory.CreateArtificialType(getOrCreateType(ThisPtr, Unit));
+  TypeCache[ThisPtr.getAsOpaquePtr()] = ThisPtrType.getNode();  
+  Elts.push_back(ThisPtrType);
+
+  // Copy rest of the arguments.
+  for (unsigned i = 1, e = Args.getNumElements(); i != e; ++i)
+    Elts.push_back(Args.getElement(i));
+
+  llvm::DIArray EltTypeArray =
+    DebugFactory.GetOrCreateArray(Elts.data(), Elts.size());
+
+  return
+    DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_subroutine_type,
+                                     Unit, "", llvm::DICompileUnit(),
+                                     0, 0, 0, 0, 0,
+                                     llvm::DIType(), EltTypeArray);
+}
+
+/// CreateCXXMemberFunction - A helper function to create a DISubprogram for
+/// a single member function GlobalDecl.
+llvm::DISubprogram
+CGDebugInfo::CreateCXXMemberFunction(const CXXMethodDecl *Method,
+                                     llvm::DICompileUnit Unit,
+                                     llvm::DICompositeType &RecordTy) {
+  bool IsCtorOrDtor = 
+    isa<CXXConstructorDecl>(Method) || isa<CXXDestructorDecl>(Method);
+  
+  llvm::StringRef MethodName = getFunctionName(Method);
+  llvm::StringRef MethodLinkageName;
+  llvm::DIType MethodTy = getOrCreateMethodType(Method, Unit);
+  
+  // Since a single ctor/dtor corresponds to multiple functions, it doesn't
+  // make sense to give a single ctor/dtor a linkage name.
+  if (!IsCtorOrDtor)
+    MethodLinkageName = CGM.getMangledName(Method);
+
+  SourceManager &SM = CGM.getContext().getSourceManager();
+
+  // Get the location for the method.
+  SourceLocation MethodDefLoc = Method->getLocation();
+  PresumedLoc PLoc = SM.getPresumedLoc(MethodDefLoc);
+  llvm::DICompileUnit MethodDefUnit;
+  unsigned MethodLine = 0;
+
+  if (!PLoc.isInvalid()) {
+    MethodDefUnit = getOrCreateCompileUnit(MethodDefLoc);
+    MethodLine = PLoc.getLine();
+  }
+
+  // Collect virtual method info.
+  llvm::DIType ContainingType;
+  unsigned Virtuality = 0; 
+  unsigned VIndex = 0;
+  
+  if (Method->isVirtual()) {
+    if (Method->isPure())
+      Virtuality = llvm::dwarf::DW_VIRTUALITY_pure_virtual;
+    else
+      Virtuality = llvm::dwarf::DW_VIRTUALITY_virtual;
+    
+    // It doesn't make sense to give a virtual destructor a vtable index,
+    // since a single destructor has two entries in the vtable.
+    if (!isa<CXXDestructorDecl>(Method))
+      VIndex = CGM.getVtableInfo().getMethodVtableIndex(Method);
+    ContainingType = RecordTy;
+  }
+
+  llvm::DISubprogram SP =
+    DebugFactory.CreateSubprogram(RecordTy , MethodName, MethodName, 
+                                  MethodLinkageName,
+                                  MethodDefUnit, MethodLine,
+                                  MethodTy, /*isLocalToUnit=*/false, 
+                                  Method->isThisDeclarationADefinition(),
+                                  Virtuality, VIndex, ContainingType);
+  
+  // Don't cache ctors or dtors since we have to emit multiple functions for
+  // a single ctor or dtor.
+  if (!IsCtorOrDtor && Method->isThisDeclarationADefinition())
+    SPCache[Method] = llvm::WeakVH(SP.getNode());
+
+  return SP;
+}
+
+/// CollectCXXMemberFunctions - A helper function to collect debug info for
+/// C++ member functions.This is used while creating debug info entry for 
+/// a Record.
+void CGDebugInfo::
+CollectCXXMemberFunctions(const CXXRecordDecl *RD, llvm::DICompileUnit Unit,
+                          llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys,
+                          llvm::DICompositeType &RecordTy) {
+  for(CXXRecordDecl::method_iterator I = RD->method_begin(),
+        E = RD->method_end(); I != E; ++I) {
+    const CXXMethodDecl *Method = *I;
+    
+    if (Method->isImplicit() && !Method->isUsed())
+      continue;
+
+    EltTys.push_back(CreateCXXMemberFunction(Method, Unit, RecordTy));
+  }
+}                                 
+
+/// CollectCXXBases - A helper function to collect debug info for
+/// C++ base classes. This is used while creating debug info entry for 
+/// a Record.
+void CGDebugInfo::
+CollectCXXBases(const CXXRecordDecl *RD, llvm::DICompileUnit Unit,
+                llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys,
+                llvm::DICompositeType &RecordTy) {
+
+  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
+  for (CXXRecordDecl::base_class_const_iterator BI = RD->bases_begin(),
+         BE = RD->bases_end(); BI != BE; ++BI) {
+    unsigned BFlags = 0;
+    uint64_t BaseOffset;
+    
+    const CXXRecordDecl *Base =
+      cast<CXXRecordDecl>(BI->getType()->getAs<RecordType>()->getDecl());
+    
+    if (BI->isVirtual()) {
+      // virtual base offset index is -ve. The code generator emits dwarf
+      // expression where it expects +ve number.
+      BaseOffset = 0 - CGM.getVtableInfo().getVirtualBaseOffsetIndex(RD, Base);
+      BFlags = llvm::DIType::FlagVirtual;
+    } else
+      BaseOffset = RL.getBaseClassOffset(Base);
+    
+    AccessSpecifier Access = BI->getAccessSpecifier();
+    if (Access == clang::AS_private)
+      BFlags |= llvm::DIType::FlagPrivate;
+    else if (Access == clang::AS_protected)
+      BFlags |= llvm::DIType::FlagProtected;
+    
+    llvm::DIType DTy =
+      DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_inheritance,
+                                     RecordTy, llvm::StringRef(), 
+                                     llvm::DICompileUnit(), 0, 0, 0,
+                                     BaseOffset, BFlags,
+                                     getOrCreateType(BI->getType(),
+                                                     Unit));
+    EltTys.push_back(DTy);
+  }
+}
+
+/// getOrCreateVTablePtrType - Return debug info descriptor for vtable.
+llvm::DIType CGDebugInfo::getOrCreateVTablePtrType(llvm::DICompileUnit Unit) {
+  if (!VTablePtrType.isNull())
+    return VTablePtrType;
+
+  ASTContext &Context = CGM.getContext();
+
+  /* Function type */
+  llvm::SmallVector<llvm::DIDescriptor, 16> STys;
+  STys.push_back(getOrCreateType(Context.IntTy, Unit));
+  llvm::DIArray SElements =
+    DebugFactory.GetOrCreateArray(STys.data(), STys.size());
+  llvm::DIType SubTy =
+    DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_subroutine_type,
+                                     Unit, "", llvm::DICompileUnit(),
+                                     0, 0, 0, 0, 0, llvm::DIType(), SElements);
+
+  unsigned Size = Context.getTypeSize(Context.VoidPtrTy);
+  llvm::DIType vtbl_ptr_type 
+    = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type,
+                                     Unit, "__vtbl_ptr_type", llvm::DICompileUnit(),
+                                     0, Size, 0, 0, 0, SubTy);
+
+  VTablePtrType = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_pointer_type,
+                                          Unit, "", llvm::DICompileUnit(),
+                                          0, Size, 0, 0, 0, vtbl_ptr_type);
+  return VTablePtrType;
+}
+
+/// getVtableName - Get vtable name for the given Class.
+llvm::StringRef CGDebugInfo::getVtableName(const CXXRecordDecl *RD) {
+  // Otherwise construct gdb compatible name name.
+  std::string Name = "_vptr$" + RD->getNameAsString();
+
+  // Copy this name on the side and use its reference.
+  char *StrPtr = DebugInfoNames.Allocate<char>(Name.length());
+  memcpy(StrPtr, Name.data(), Name.length());
+  return llvm::StringRef(StrPtr, Name.length());
+}
+
+
+/// CollectVtableInfo - If the C++ class has vtable info then insert appropriate
+/// debug info entry in EltTys vector.
+void CGDebugInfo::
+CollectVtableInfo(const CXXRecordDecl *RD, llvm::DICompileUnit Unit,
+                  llvm::SmallVectorImpl<llvm::DIDescriptor> &EltTys) {
+  const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
+
+  // If there is a primary base then it will hold vtable info.
+  if (RL.getPrimaryBase())
+    return;
+
+  // If this class is not dynamic then there is not any vtable info to collect.
+  if (!RD->isDynamicClass())
+    return;
+
+  unsigned Size = CGM.getContext().getTypeSize(CGM.getContext().VoidPtrTy);
+  llvm::DIType VPTR
+    = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                     getVtableName(RD), llvm::DICompileUnit(),
+                                     0, Size, 0, 0, 0, 
+                                     getOrCreateVTablePtrType(Unit));
+  EltTys.push_back(VPTR);
+}
+
+/// CreateType - get structure or union type.
+llvm::DIType CGDebugInfo::CreateType(const RecordType *Ty,
+                                     llvm::DICompileUnit Unit) {
+  RecordDecl *RD = Ty->getDecl();
+
+  unsigned Tag;
+  if (RD->isStruct())
+    Tag = llvm::dwarf::DW_TAG_structure_type;
+  else if (RD->isUnion())
+    Tag = llvm::dwarf::DW_TAG_union_type;
+  else {
+    assert(RD->isClass() && "Unknown RecordType!");
+    Tag = llvm::dwarf::DW_TAG_class_type;
+  }
+
+  SourceManager &SM = CGM.getContext().getSourceManager();
+
+  // Get overall information about the record type for the debug info.
+  PresumedLoc PLoc = SM.getPresumedLoc(RD->getLocation());
+  llvm::DICompileUnit DefUnit;
+  unsigned Line = 0;
+  if (!PLoc.isInvalid()) {
+    DefUnit = getOrCreateCompileUnit(RD->getLocation());
+    Line = PLoc.getLine();
+  }
+
+  // Records and classes and unions can all be recursive.  To handle them, we
+  // first generate a debug descriptor for the struct as a forward declaration.
+  // Then (if it is a definition) we go through and get debug info for all of
+  // its members.  Finally, we create a descriptor for the complete type (which
+  // may refer to the forward decl if the struct is recursive) and replace all
+  // uses of the forward declaration with the final definition.
+
+  // A RD->getName() is not unique. However, the debug info descriptors 
+  // are uniqued so use type name to ensure uniquness.
+  std::string STy = QualType(Ty, 0).getAsString();
+  llvm::DIDescriptor FDContext = 
+    getContextDescriptor(dyn_cast<Decl>(RD->getDeclContext()), Unit);
+  llvm::DICompositeType FwdDecl =
+    DebugFactory.CreateCompositeType(Tag, FDContext,
+                                     STy.c_str(),
+                                     DefUnit, Line, 0, 0, 0, 0,
+                                     llvm::DIType(), llvm::DIArray());
+
+  // If this is just a forward declaration, return it.
+  if (!RD->getDefinition(CGM.getContext()))
+    return FwdDecl;
+
+  llvm::TrackingVH<llvm::MDNode> FwdDeclNode = FwdDecl.getNode();
+  // Otherwise, insert it into the TypeCache so that recursive uses will find
+  // it.
+  TypeCache[QualType(Ty, 0).getAsOpaquePtr()] = FwdDecl.getNode();
+
+  // Convert all the elements.
+  llvm::SmallVector<llvm::DIDescriptor, 16> EltTys;
+
+  const CXXRecordDecl *CXXDecl = dyn_cast<CXXRecordDecl>(RD);
+  if (CXXDecl) {
+    CollectCXXBases(CXXDecl, Unit, EltTys, FwdDecl);
+    CollectVtableInfo(CXXDecl, Unit, EltTys);
+  }
+  CollectRecordFields(RD, Unit, EltTys);
+  llvm::MDNode *ContainingType = NULL;
+  if (CXXDecl) {
+    CollectCXXMemberFunctions(CXXDecl, Unit, EltTys, FwdDecl);
+
+    // A class's primary base or the class itself contains the vtable.
+    const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
+    if (const CXXRecordDecl *PBase = RL.getPrimaryBase())
+      ContainingType = 
+        getOrCreateType(QualType(PBase->getTypeForDecl(), 0), Unit).getNode();
+    else if (CXXDecl->isDynamicClass()) 
+      ContainingType = FwdDecl.getNode();
+  }
+
+  llvm::DIArray Elements =
+    DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
+
+  // Bit size, align and offset of the type.
+  uint64_t Size = CGM.getContext().getTypeSize(Ty);
+  uint64_t Align = CGM.getContext().getTypeAlign(Ty);
+
+  llvm::DIDescriptor RDContext =  
+    getContextDescriptor(dyn_cast<Decl>(RD->getDeclContext()), Unit);
+  llvm::DICompositeType RealDecl =
+    DebugFactory.CreateCompositeType(Tag, RDContext,
+                                     RD->getName(),
+                                     DefUnit, Line, Size, Align, 0, 0, 
+                                     llvm::DIType(), Elements, 
+                                     0, ContainingType);
+
+  // Now that we have a real decl for the struct, replace anything using the
+  // old decl with the new one.  This will recursively update the debug info.
+  llvm::DIDerivedType(FwdDeclNode).replaceAllUsesWith(RealDecl);
+
+  return RealDecl;
+}
+
+/// CreateType - get objective-c interface type.
+llvm::DIType CGDebugInfo::CreateType(const ObjCInterfaceType *Ty,
+                                     llvm::DICompileUnit Unit) {
+  ObjCInterfaceDecl *ID = Ty->getDecl();
+
+  unsigned Tag = llvm::dwarf::DW_TAG_structure_type;
+  SourceManager &SM = CGM.getContext().getSourceManager();
+
+  // Get overall information about the record type for the debug info.
+  llvm::DICompileUnit DefUnit = getOrCreateCompileUnit(ID->getLocation());
+  PresumedLoc PLoc = SM.getPresumedLoc(ID->getLocation());
+  unsigned Line = PLoc.isInvalid() ? 0 : PLoc.getLine();
+
+
+  unsigned RuntimeLang = DefUnit.getLanguage();
+
+  // To handle recursive interface, we
+  // first generate a debug descriptor for the struct as a forward declaration.
+  // Then (if it is a definition) we go through and get debug info for all of
+  // its members.  Finally, we create a descriptor for the complete type (which
+  // may refer to the forward decl if the struct is recursive) and replace all
+  // uses of the forward declaration with the final definition.
+  llvm::DICompositeType FwdDecl =
+    DebugFactory.CreateCompositeType(Tag, Unit, ID->getName(),
+                                     DefUnit, Line, 0, 0, 0, 0,
+                                     llvm::DIType(), llvm::DIArray(),
+                                     RuntimeLang);
+
+  // If this is just a forward declaration, return it.
+  if (ID->isForwardDecl())
+    return FwdDecl;
+
+  llvm::TrackingVH<llvm::MDNode> FwdDeclNode = FwdDecl.getNode();
+  // Otherwise, insert it into the TypeCache so that recursive uses will find
+  // it.
+  TypeCache[QualType(Ty, 0).getAsOpaquePtr()] = FwdDecl.getNode();
+
+  // Convert all the elements.
+  llvm::SmallVector<llvm::DIDescriptor, 16> EltTys;
+
+  ObjCInterfaceDecl *SClass = ID->getSuperClass();
+  if (SClass) {
+    llvm::DIType SClassTy =
+      getOrCreateType(CGM.getContext().getObjCInterfaceType(SClass), Unit);
+    llvm::DIType InhTag =
+      DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_inheritance,
+                                     Unit, "", llvm::DICompileUnit(), 0, 0, 0,
+                                     0 /* offset */, 0, SClassTy);
+    EltTys.push_back(InhTag);
+  }
+
+  const ASTRecordLayout &RL = CGM.getContext().getASTObjCInterfaceLayout(ID);
+
+  unsigned FieldNo = 0;
+  for (ObjCInterfaceDecl::ivar_iterator I = ID->ivar_begin(),
+         E = ID->ivar_end();  I != E; ++I, ++FieldNo) {
+    ObjCIvarDecl *Field = *I;
+    llvm::DIType FieldTy = getOrCreateType(Field->getType(), Unit);
+
+    llvm::StringRef FieldName = Field->getName();
+
+    // Ignore unnamed fields.
+    if (FieldName.empty())
+      continue;
+
+    // Get the location for the field.
+    SourceLocation FieldDefLoc = Field->getLocation();
+    llvm::DICompileUnit FieldDefUnit = getOrCreateCompileUnit(FieldDefLoc);
+    PresumedLoc PLoc = SM.getPresumedLoc(FieldDefLoc);
+    unsigned FieldLine = PLoc.isInvalid() ? 0 : PLoc.getLine();
+
+
+    QualType FType = Field->getType();
+    uint64_t FieldSize = 0;
+    unsigned FieldAlign = 0;
+
+    if (!FType->isIncompleteArrayType()) {
+
+      // Bit size, align and offset of the type.
+      FieldSize = CGM.getContext().getTypeSize(FType);
+      Expr *BitWidth = Field->getBitWidth();
+      if (BitWidth)
+        FieldSize = BitWidth->EvaluateAsInt(CGM.getContext()).getZExtValue();
+
+      FieldAlign =  CGM.getContext().getTypeAlign(FType);
+    }
+
+    uint64_t FieldOffset = RL.getFieldOffset(FieldNo);
+
+    unsigned Flags = 0;
+    if (Field->getAccessControl() == ObjCIvarDecl::Protected)
+      Flags = llvm::DIType::FlagProtected;
+    else if (Field->getAccessControl() == ObjCIvarDecl::Private)
+      Flags = llvm::DIType::FlagPrivate;
+
+    // Create a DW_TAG_member node to remember the offset of this field in the
+    // struct.  FIXME: This is an absolutely insane way to capture this
+    // information.  When we gut debug info, this should be fixed.
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             FieldName, FieldDefUnit,
+                                             FieldLine, FieldSize, FieldAlign,
+                                             FieldOffset, Flags, FieldTy);
+    EltTys.push_back(FieldTy);
+  }
+
+  llvm::DIArray Elements =
+    DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
+
+  // Bit size, align and offset of the type.
+  uint64_t Size = CGM.getContext().getTypeSize(Ty);
+  uint64_t Align = CGM.getContext().getTypeAlign(Ty);
+
+  llvm::DICompositeType RealDecl =
+    DebugFactory.CreateCompositeType(Tag, Unit, ID->getName(), DefUnit,
+                                     Line, Size, Align, 0, 0, llvm::DIType(), 
+                                     Elements, RuntimeLang);
+
+  // Now that we have a real decl for the struct, replace anything using the
+  // old decl with the new one.  This will recursively update the debug info.
+  llvm::DIDerivedType(FwdDeclNode).replaceAllUsesWith(RealDecl);
+
+  return RealDecl;
+}
+
+llvm::DIType CGDebugInfo::CreateType(const EnumType *Ty,
+                                     llvm::DICompileUnit Unit) {
+  EnumDecl *ED = Ty->getDecl();
+
+  llvm::SmallVector<llvm::DIDescriptor, 32> Enumerators;
+
+  // Create DIEnumerator elements for each enumerator.
+  for (EnumDecl::enumerator_iterator
+         Enum = ED->enumerator_begin(), EnumEnd = ED->enumerator_end();
+       Enum != EnumEnd; ++Enum) {
+    Enumerators.push_back(DebugFactory.CreateEnumerator(Enum->getName(),
+                                            Enum->getInitVal().getZExtValue()));
+  }
+
+  // Return a CompositeType for the enum itself.
+  llvm::DIArray EltArray =
+    DebugFactory.GetOrCreateArray(Enumerators.data(), Enumerators.size());
+
+  SourceLocation DefLoc = ED->getLocation();
+  llvm::DICompileUnit DefUnit = getOrCreateCompileUnit(DefLoc);
+  SourceManager &SM = CGM.getContext().getSourceManager();
+  PresumedLoc PLoc = SM.getPresumedLoc(DefLoc);
+  unsigned Line = PLoc.isInvalid() ? 0 : PLoc.getLine();
+
+
+  // Size and align of the type.
+  uint64_t Size = 0;
+  unsigned Align = 0;
+  if (!Ty->isIncompleteType()) {
+    Size = CGM.getContext().getTypeSize(Ty);
+    Align = CGM.getContext().getTypeAlign(Ty);
+  }
+
+  llvm::DIType DbgTy = 
+    DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_enumeration_type,
+                                     Unit, ED->getName(), DefUnit, Line,
+                                     Size, Align, 0, 0,
+                                     llvm::DIType(), EltArray);
+  return DbgTy;
+}
+
+llvm::DIType CGDebugInfo::CreateType(const TagType *Ty,
+                                     llvm::DICompileUnit Unit) {
+  if (const RecordType *RT = dyn_cast<RecordType>(Ty))
+    return CreateType(RT, Unit);
+  else if (const EnumType *ET = dyn_cast<EnumType>(Ty))
+    return CreateType(ET, Unit);
+
+  return llvm::DIType();
+}
+
+llvm::DIType CGDebugInfo::CreateType(const ArrayType *Ty,
+                                     llvm::DICompileUnit Unit) {
+  uint64_t Size;
+  uint64_t Align;
+
+
+  // FIXME: make getTypeAlign() aware of VLAs and incomplete array types
+  if (const VariableArrayType *VAT = dyn_cast<VariableArrayType>(Ty)) {
+    Size = 0;
+    Align =
+      CGM.getContext().getTypeAlign(CGM.getContext().getBaseElementType(VAT));
+  } else if (Ty->isIncompleteArrayType()) {
+    Size = 0;
+    Align = CGM.getContext().getTypeAlign(Ty->getElementType());
+  } else {
+    // Size and align of the whole array, not the element type.
+    Size = CGM.getContext().getTypeSize(Ty);
+    Align = CGM.getContext().getTypeAlign(Ty);
+  }
+
+  // Add the dimensions of the array.  FIXME: This loses CV qualifiers from
+  // interior arrays, do we care?  Why aren't nested arrays represented the
+  // obvious/recursive way?
+  llvm::SmallVector<llvm::DIDescriptor, 8> Subscripts;
+  QualType EltTy(Ty, 0);
+  while ((Ty = dyn_cast<ArrayType>(EltTy))) {
+    uint64_t Upper = 0;
+    if (const ConstantArrayType *CAT = dyn_cast<ConstantArrayType>(Ty))
+      if (CAT->getSize().getZExtValue())
+        Upper = CAT->getSize().getZExtValue() - 1;
+    // FIXME: Verify this is right for VLAs.
+    Subscripts.push_back(DebugFactory.GetOrCreateSubrange(0, Upper));
+    EltTy = Ty->getElementType();
+  }
+
+  llvm::DIArray SubscriptArray =
+    DebugFactory.GetOrCreateArray(Subscripts.data(), Subscripts.size());
+
+  llvm::DIType DbgTy = 
+    DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_array_type,
+                                     Unit, "", llvm::DICompileUnit(),
+                                     0, Size, Align, 0, 0,
+                                     getOrCreateType(EltTy, Unit),
+                                     SubscriptArray);
+  return DbgTy;
+}
+
+llvm::DIType CGDebugInfo::CreateType(const LValueReferenceType *Ty, 
+                                     llvm::DICompileUnit Unit) {
+  return CreatePointerLikeType(llvm::dwarf::DW_TAG_reference_type, 
+                               Ty, Ty->getPointeeType(), Unit);
+}
+
+llvm::DIType CGDebugInfo::CreateType(const MemberPointerType *Ty, 
+                                     llvm::DICompileUnit U) {
+  QualType PointerDiffTy = CGM.getContext().getPointerDiffType();
+  llvm::DIType PointerDiffDITy = getOrCreateType(PointerDiffTy, U);
+  
+  if (!Ty->getPointeeType()->isFunctionType()) {
+    // We have a data member pointer type.
+    return PointerDiffDITy;
+  }
+  
+  // We have a member function pointer type. Treat it as a struct with two
+  // ptrdiff_t members.
+  std::pair<uint64_t, unsigned> Info = CGM.getContext().getTypeInfo(Ty);
+
+  uint64_t FieldOffset = 0;
+  llvm::DIDescriptor ElementTypes[2];
+  
+  // FIXME: This should probably be a function type instead.
+  ElementTypes[0] =
+    DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, U,
+                                   "ptr", llvm::DICompileUnit(), 0,
+                                   Info.first, Info.second, FieldOffset, 0,
+                                   PointerDiffDITy);
+  FieldOffset += Info.first;
+  
+  ElementTypes[1] =
+    DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, U,
+                                   "ptr", llvm::DICompileUnit(), 0,
+                                   Info.first, Info.second, FieldOffset, 0,
+                                   PointerDiffDITy);
+  
+  llvm::DIArray Elements = 
+    DebugFactory.GetOrCreateArray(&ElementTypes[0],
+                                  llvm::array_lengthof(ElementTypes));
+
+  return DebugFactory.CreateCompositeType(llvm::dwarf::DW_TAG_structure_type, 
+                                          U, llvm::StringRef("test"), 
+                                          llvm::DICompileUnit(), 0, FieldOffset, 
+                                          0, 0, 0, llvm::DIType(), Elements);
+}
+
+static QualType UnwrapTypeForDebugInfo(QualType T) {
+  do {
+    QualType LastT = T;
+    switch (T->getTypeClass()) {
+    default:
+      return T;
+    case Type::TemplateSpecialization:
+      T = cast<TemplateSpecializationType>(T)->desugar();
+      break;
+    case Type::TypeOfExpr: {
+      TypeOfExprType *Ty = cast<TypeOfExprType>(T);
+      T = Ty->getUnderlyingExpr()->getType();
+      break;
+    }
+    case Type::TypeOf:
+      T = cast<TypeOfType>(T)->getUnderlyingType();
+      break;
+    case Type::Decltype:
+      T = cast<DecltypeType>(T)->getUnderlyingType();
+      break;
+    case Type::QualifiedName:
+      T = cast<QualifiedNameType>(T)->getNamedType();
+      break;
+    case Type::SubstTemplateTypeParm:
+      T = cast<SubstTemplateTypeParmType>(T)->getReplacementType();
+      break;
+    case Type::Elaborated:
+      T = cast<ElaboratedType>(T)->getUnderlyingType();
+      break;
+    }
+    
+    assert(T != LastT && "Type unwrapping failed to unwrap!");
+    if (T == LastT)
+      return T;
+  } while (true);
+  
+  return T;
+}
+
+/// getOrCreateType - Get the type from the cache or create a new
+/// one if necessary.
+llvm::DIType CGDebugInfo::getOrCreateType(QualType Ty,
+                                          llvm::DICompileUnit Unit) {
+  if (Ty.isNull())
+    return llvm::DIType();
+
+  // Unwrap the type as needed for debug information.
+  Ty = UnwrapTypeForDebugInfo(Ty);
+  
+  // Check for existing entry.
+  std::map<void *, llvm::WeakVH>::iterator it =
+    TypeCache.find(Ty.getAsOpaquePtr());
+  if (it != TypeCache.end()) {
+    // Verify that the debug info still exists.
+    if (&*it->second)
+      return llvm::DIType(cast<llvm::MDNode>(it->second));
+  }
+
+  // Otherwise create the type.
+  llvm::DIType Res = CreateTypeNode(Ty, Unit);
+
+  // And update the type cache.
+  TypeCache[Ty.getAsOpaquePtr()] = Res.getNode();  
+  return Res;
+}
+
+/// CreateTypeNode - Create a new debug type node.
+llvm::DIType CGDebugInfo::CreateTypeNode(QualType Ty,
+                                         llvm::DICompileUnit Unit) {
+  // Handle qualifiers, which recursively handles what they refer to.
+  if (Ty.hasLocalQualifiers())
+    return CreateQualifiedType(Ty, Unit);
+
+  const char *Diag = 0;
+  
+  // Work out details of type.
+  switch (Ty->getTypeClass()) {
+#define TYPE(Class, Base)
+#define ABSTRACT_TYPE(Class, Base)
+#define NON_CANONICAL_TYPE(Class, Base)
+#define DEPENDENT_TYPE(Class, Base) case Type::Class:
+#include "clang/AST/TypeNodes.def"
+    assert(false && "Dependent types cannot show up in debug information");
+
+  // FIXME: Handle these.
+  case Type::ExtVector:
+  case Type::Vector:
+    return llvm::DIType();
+      
+  case Type::ObjCObjectPointer:
+    return CreateType(cast<ObjCObjectPointerType>(Ty), Unit);
+  case Type::ObjCInterface:
+    return CreateType(cast<ObjCInterfaceType>(Ty), Unit);
+  case Type::Builtin: return CreateType(cast<BuiltinType>(Ty), Unit);
+  case Type::Complex: return CreateType(cast<ComplexType>(Ty), Unit);
+  case Type::Pointer: return CreateType(cast<PointerType>(Ty), Unit);
+  case Type::BlockPointer:
+    return CreateType(cast<BlockPointerType>(Ty), Unit);
+  case Type::Typedef: return CreateType(cast<TypedefType>(Ty), Unit);
+  case Type::Record:
+  case Type::Enum:
+    return CreateType(cast<TagType>(Ty), Unit);
+  case Type::FunctionProto:
+  case Type::FunctionNoProto:
+    return CreateType(cast<FunctionType>(Ty), Unit);
+  case Type::ConstantArray:
+  case Type::VariableArray:
+  case Type::IncompleteArray:
+    return CreateType(cast<ArrayType>(Ty), Unit);
+
+  case Type::LValueReference:
+    return CreateType(cast<LValueReferenceType>(Ty), Unit);
+
+  case Type::MemberPointer:
+    return CreateType(cast<MemberPointerType>(Ty), Unit);
+
+  case Type::TemplateSpecialization:
+  case Type::Elaborated:
+  case Type::QualifiedName:
+  case Type::SubstTemplateTypeParm:
+  case Type::TypeOfExpr:
+  case Type::TypeOf:
+  case Type::Decltype:
+    llvm_unreachable("type should have been unwrapped!");
+    return llvm::DIType();
+      
+  case Type::RValueReference:
+    // FIXME: Implement!
+    Diag = "rvalue references";
+    break;
+  }
+  
+  assert(Diag && "Fall through without a diagnostic?");
+  unsigned DiagID = CGM.getDiags().getCustomDiagID(Diagnostic::Error,
+                               "debug information for %0 is not yet supported");
+  CGM.getDiags().Report(FullSourceLoc(), DiagID)
+    << Diag;
+  return llvm::DIType();
+}
+
+/// EmitFunctionStart - Constructs the debug code for entering a function -
+/// "llvm.dbg.func.start.".
+void CGDebugInfo::EmitFunctionStart(GlobalDecl GD, QualType FnType,
+                                    llvm::Function *Fn,
+                                    CGBuilderTy &Builder) {
+
+  llvm::StringRef Name;
+  llvm::StringRef LinkageName;
+
+  const Decl *D = GD.getDecl();
+  if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
+    // If there is a DISubprogram for  this function available then use it.
+    llvm::DenseMap<const FunctionDecl *, llvm::WeakVH>::iterator
+      FI = SPCache.find(FD);
+    if (FI != SPCache.end()) {
+      llvm::DISubprogram SP(dyn_cast_or_null<llvm::MDNode>(FI->second));
+      if (!SP.isNull() && SP.isSubprogram() && SP.isDefinition()) {
+        RegionStack.push_back(SP.getNode());
+        RegionMap[D] = llvm::WeakVH(SP.getNode());
+        return;
+      }
+    }
+    Name = getFunctionName(FD);
+    if (!Name.empty() && Name[0] == '\01')
+      Name = Name.substr(1);
+    // Use mangled name as linkage name for c/c++ functions.
+    LinkageName = CGM.getMangledName(GD);
+  } else {
+    // Use llvm function name as linkage name.
+    Name = Fn->getName();
+    LinkageName = Name;
+    if (!Name.empty() && Name[0] == '\01')
+      Name = Name.substr(1);
+  }
+
+  // It is expected that CurLoc is set before using EmitFunctionStart.
+  // Usually, CurLoc points to the left bracket location of compound
+  // statement representing function body.
+  llvm::DICompileUnit Unit = getOrCreateCompileUnit(CurLoc);
+  SourceManager &SM = CGM.getContext().getSourceManager();
+  unsigned LineNo = SM.getPresumedLoc(CurLoc).getLine();
+
+  llvm::DISubprogram SP =
+    DebugFactory.CreateSubprogram(Unit, Name, Name, LinkageName, Unit, LineNo,
+                                  getOrCreateType(FnType, Unit),
+                                  Fn->hasInternalLinkage(), true/*definition*/);
+
+  // Push function on region stack.
+  RegionStack.push_back(SP.getNode());
+  RegionMap[D] = llvm::WeakVH(SP.getNode());
+}
+
+
+void CGDebugInfo::EmitStopPoint(llvm::Function *Fn, CGBuilderTy &Builder) {
+  if (CurLoc.isInvalid() || CurLoc.isMacroID()) return;
+
+  // Don't bother if things are the same as last time.
+  SourceManager &SM = CGM.getContext().getSourceManager();
+  if (CurLoc == PrevLoc
+       || (SM.getInstantiationLineNumber(CurLoc) ==
+           SM.getInstantiationLineNumber(PrevLoc)
+           && SM.isFromSameFile(CurLoc, PrevLoc)))
+    return;
+
+  // Update last state.
+  PrevLoc = CurLoc;
+
+  // Get the appropriate compile unit.
+  llvm::DICompileUnit Unit = getOrCreateCompileUnit(CurLoc);
+  PresumedLoc PLoc = SM.getPresumedLoc(CurLoc);
+
+  llvm::DIDescriptor DR(RegionStack.back());
+  llvm::DIScope DS = llvm::DIScope(DR.getNode());
+  llvm::DILocation DO(NULL);
+  llvm::DILocation DL = 
+    DebugFactory.CreateLocation(PLoc.getLine(), PLoc.getColumn(),
+                                DS, DO);
+  Builder.SetCurrentDebugLocation(DL.getNode());
+}
+
+/// EmitRegionStart- Constructs the debug code for entering a declarative
+/// region - "llvm.dbg.region.start.".
+void CGDebugInfo::EmitRegionStart(llvm::Function *Fn, CGBuilderTy &Builder) {
+  llvm::DIDescriptor D =
+    DebugFactory.CreateLexicalBlock(RegionStack.empty() ? 
+                                    llvm::DIDescriptor() : 
+                                    llvm::DIDescriptor(RegionStack.back()));
+  RegionStack.push_back(D.getNode());
+}
+
+/// EmitRegionEnd - Constructs the debug code for exiting a declarative
+/// region - "llvm.dbg.region.end."
+void CGDebugInfo::EmitRegionEnd(llvm::Function *Fn, CGBuilderTy &Builder) {
+  assert(!RegionStack.empty() && "Region stack mismatch, stack empty!");
+
+  // Provide an region stop point.
+  EmitStopPoint(Fn, Builder);
+
+  RegionStack.pop_back();
+}
+
+/// EmitDeclare - Emit local variable declaration debug info.
+void CGDebugInfo::EmitDeclare(const VarDecl *VD, unsigned Tag,
+                              llvm::Value *Storage, CGBuilderTy &Builder) {
+  assert(!RegionStack.empty() && "Region stack mismatch, stack empty!");
+
+  // Do not emit variable debug information while generating optimized code.
+  // The llvm optimizer and code generator are not yet ready to support
+  // optimized code debugging.
+  const CodeGenOptions &CGO = CGM.getCodeGenOpts();
+  if (CGO.OptimizationLevel)
+    return;
+
+  llvm::DICompileUnit Unit = getOrCreateCompileUnit(VD->getLocation());
+  QualType Type = VD->getType();
+  llvm::DIType Ty = getOrCreateType(Type, Unit);
+  if (VD->hasAttr<BlocksAttr>()) {
+    llvm::DICompileUnit DefUnit;
+    unsigned Tag = llvm::dwarf::DW_TAG_structure_type;
+
+    llvm::SmallVector<llvm::DIDescriptor, 5> EltTys;
+
+    llvm::DIType FieldTy;
+
+    QualType FType;
+    uint64_t FieldSize, FieldOffset;
+    unsigned FieldAlign;
+
+    llvm::DIArray Elements;
+    llvm::DIType EltTy;
+    
+    // Build up structure for the byref.  See BuildByRefType.
+    FieldOffset = 0;
+    FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
+    FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+    FieldSize = CGM.getContext().getTypeSize(FType);
+    FieldAlign = CGM.getContext().getTypeAlign(FType);
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             "__isa", DefUnit,
+                                             0, FieldSize, FieldAlign,
+                                             FieldOffset, 0, FieldTy);
+    EltTys.push_back(FieldTy);
+    FieldOffset += FieldSize;
+
+    FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
+    FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+    FieldSize = CGM.getContext().getTypeSize(FType);
+    FieldAlign = CGM.getContext().getTypeAlign(FType);
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             "__forwarding", DefUnit,
+                                             0, FieldSize, FieldAlign,
+                                             FieldOffset, 0, FieldTy);
+    EltTys.push_back(FieldTy);
+    FieldOffset += FieldSize;
+
+    FType = CGM.getContext().IntTy;
+    FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+    FieldSize = CGM.getContext().getTypeSize(FType);
+    FieldAlign = CGM.getContext().getTypeAlign(FType);
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             "__flags", DefUnit,
+                                             0, FieldSize, FieldAlign,
+                                             FieldOffset, 0, FieldTy);
+    EltTys.push_back(FieldTy);
+    FieldOffset += FieldSize;
+
+    FType = CGM.getContext().IntTy;
+    FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+    FieldSize = CGM.getContext().getTypeSize(FType);
+    FieldAlign = CGM.getContext().getTypeAlign(FType);
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             "__size", DefUnit,
+                                             0, FieldSize, FieldAlign,
+                                             FieldOffset, 0, FieldTy);
+    EltTys.push_back(FieldTy);
+    FieldOffset += FieldSize;
+    
+    bool HasCopyAndDispose = CGM.BlockRequiresCopying(Type);
+    if (HasCopyAndDispose) {
+      FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
+      FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+      FieldSize = CGM.getContext().getTypeSize(FType);
+      FieldAlign = CGM.getContext().getTypeAlign(FType);
+      FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                               "__copy_helper", DefUnit,
+                                               0, FieldSize, FieldAlign,
+                                               FieldOffset, 0, FieldTy);
+      EltTys.push_back(FieldTy);
+      FieldOffset += FieldSize;
+
+      FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
+      FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+      FieldSize = CGM.getContext().getTypeSize(FType);
+      FieldAlign = CGM.getContext().getTypeAlign(FType);
+      FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                               "__destroy_helper", DefUnit,
+                                               0, FieldSize, FieldAlign,
+                                               FieldOffset, 0, FieldTy);
+      EltTys.push_back(FieldTy);
+      FieldOffset += FieldSize;
+    }
+    
+    CharUnits Align = CGM.getContext().getDeclAlign(VD);
+    if (Align > CharUnits::fromQuantity(
+          CGM.getContext().Target.getPointerAlign(0) / 8)) {
+      unsigned AlignedOffsetInBytes
+        = llvm::RoundUpToAlignment(FieldOffset/8, Align.getQuantity());
+      unsigned NumPaddingBytes
+        = AlignedOffsetInBytes - FieldOffset/8;
+
+      if (NumPaddingBytes > 0) {
+        llvm::APInt pad(32, NumPaddingBytes);
+        FType = CGM.getContext().getConstantArrayType(CGM.getContext().CharTy,
+                                                     pad, ArrayType::Normal, 0);
+        FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+        FieldSize = CGM.getContext().getTypeSize(FType);
+        FieldAlign = CGM.getContext().getTypeAlign(FType);
+        FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member,
+                                                 Unit, "", DefUnit,
+                                                 0, FieldSize, FieldAlign,
+                                                 FieldOffset, 0, FieldTy);
+        EltTys.push_back(FieldTy);
+        FieldOffset += FieldSize;
+      }
+    }
+
+    FType = Type;
+    FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+    FieldSize = CGM.getContext().getTypeSize(FType);
+    FieldAlign = Align.getQuantity()*8;
+    
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             VD->getName(), DefUnit,
+                                             0, FieldSize, FieldAlign,
+                                             FieldOffset, 0, FieldTy);
+    EltTys.push_back(FieldTy);
+    FieldOffset += FieldSize;
+
+    Elements = DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
+
+    unsigned Flags = llvm::DIType::FlagBlockByrefStruct;
+
+    Ty = DebugFactory.CreateCompositeType(Tag, Unit, "",
+                                          llvm::DICompileUnit(),
+                                          0, FieldOffset, 0, 0, Flags,
+                                          llvm::DIType(), Elements);
+  }
+
+  // Get location information.
+  SourceManager &SM = CGM.getContext().getSourceManager();
+  PresumedLoc PLoc = SM.getPresumedLoc(VD->getLocation());
+  unsigned Line = 0;
+  unsigned Column = 0;
+  if (PLoc.isInvalid())
+    PLoc = SM.getPresumedLoc(CurLoc);
+  if (PLoc.isValid()) {
+    Line = PLoc.getLine();
+    Column = PLoc.getColumn();
+    Unit = getOrCreateCompileUnit(CurLoc);
+  } else {
+    Unit = llvm::DICompileUnit();
+  }
+
+  // Create the descriptor for the variable.
+  llvm::DIVariable D =
+    DebugFactory.CreateVariable(Tag, llvm::DIDescriptor(RegionStack.back()),
+                                VD->getName(),
+                                Unit, Line, Ty);
+  // Insert an llvm.dbg.declare into the current block.
+  llvm::Instruction *Call =
+    DebugFactory.InsertDeclare(Storage, D, Builder.GetInsertBlock());
+
+  llvm::DIScope DS(RegionStack.back());
+  llvm::DILocation DO(NULL);
+  llvm::DILocation DL = DebugFactory.CreateLocation(Line, Column, DS, DO);
+  
+  Call->setMetadata("dbg", DL.getNode());
+}
+
+/// EmitDeclare - Emit local variable declaration debug info.
+void CGDebugInfo::EmitDeclare(const BlockDeclRefExpr *BDRE, unsigned Tag,
+                              llvm::Value *Storage, CGBuilderTy &Builder,
+                              CodeGenFunction *CGF) {
+  const ValueDecl *VD = BDRE->getDecl();
+  assert(!RegionStack.empty() && "Region stack mismatch, stack empty!");
+
+  // Do not emit variable debug information while generating optimized code.
+  // The llvm optimizer and code generator are not yet ready to support
+  // optimized code debugging.
+  const CodeGenOptions &CGO = CGM.getCodeGenOpts();
+  if (CGO.OptimizationLevel || Builder.GetInsertBlock() == 0)
+    return;
+
+  uint64_t XOffset = 0;
+  llvm::DICompileUnit Unit = getOrCreateCompileUnit(VD->getLocation());
+  QualType Type = VD->getType();
+  llvm::DIType Ty = getOrCreateType(Type, Unit);
+  if (VD->hasAttr<BlocksAttr>()) {
+    llvm::DICompileUnit DefUnit;
+    unsigned Tag = llvm::dwarf::DW_TAG_structure_type;
+
+    llvm::SmallVector<llvm::DIDescriptor, 5> EltTys;
+
+    llvm::DIType FieldTy;
+
+    QualType FType;
+    uint64_t FieldSize, FieldOffset;
+    unsigned FieldAlign;
+
+    llvm::DIArray Elements;
+    llvm::DIType EltTy;
+    
+    // Build up structure for the byref.  See BuildByRefType.
+    FieldOffset = 0;
+    FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
+    FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+    FieldSize = CGM.getContext().getTypeSize(FType);
+    FieldAlign = CGM.getContext().getTypeAlign(FType);
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             "__isa", DefUnit,
+                                             0, FieldSize, FieldAlign,
+                                             FieldOffset, 0, FieldTy);
+    EltTys.push_back(FieldTy);
+    FieldOffset += FieldSize;
+
+    FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
+    FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+    FieldSize = CGM.getContext().getTypeSize(FType);
+    FieldAlign = CGM.getContext().getTypeAlign(FType);
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             "__forwarding", DefUnit,
+                                             0, FieldSize, FieldAlign,
+                                             FieldOffset, 0, FieldTy);
+    EltTys.push_back(FieldTy);
+    FieldOffset += FieldSize;
+
+    FType = CGM.getContext().IntTy;
+    FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+    FieldSize = CGM.getContext().getTypeSize(FType);
+    FieldAlign = CGM.getContext().getTypeAlign(FType);
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             "__flags", DefUnit,
+                                             0, FieldSize, FieldAlign,
+                                             FieldOffset, 0, FieldTy);
+    EltTys.push_back(FieldTy);
+    FieldOffset += FieldSize;
+
+    FType = CGM.getContext().IntTy;
+    FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+    FieldSize = CGM.getContext().getTypeSize(FType);
+    FieldAlign = CGM.getContext().getTypeAlign(FType);
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             "__size", DefUnit,
+                                             0, FieldSize, FieldAlign,
+                                             FieldOffset, 0, FieldTy);
+    EltTys.push_back(FieldTy);
+    FieldOffset += FieldSize;
+    
+    bool HasCopyAndDispose = CGM.BlockRequiresCopying(Type);
+    if (HasCopyAndDispose) {
+      FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
+      FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+      FieldSize = CGM.getContext().getTypeSize(FType);
+      FieldAlign = CGM.getContext().getTypeAlign(FType);
+      FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                               "__copy_helper", DefUnit,
+                                               0, FieldSize, FieldAlign,
+                                               FieldOffset, 0, FieldTy);
+      EltTys.push_back(FieldTy);
+      FieldOffset += FieldSize;
+
+      FType = CGM.getContext().getPointerType(CGM.getContext().VoidTy);
+      FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+      FieldSize = CGM.getContext().getTypeSize(FType);
+      FieldAlign = CGM.getContext().getTypeAlign(FType);
+      FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                               "__destroy_helper", DefUnit,
+                                               0, FieldSize, FieldAlign,
+                                               FieldOffset, 0, FieldTy);
+      EltTys.push_back(FieldTy);
+      FieldOffset += FieldSize;
+    }
+    
+    CharUnits Align = CGM.getContext().getDeclAlign(VD);
+    if (Align > CharUnits::fromQuantity(
+          CGM.getContext().Target.getPointerAlign(0) / 8)) {
+      unsigned AlignedOffsetInBytes
+        = llvm::RoundUpToAlignment(FieldOffset/8, Align.getQuantity());
+      unsigned NumPaddingBytes
+        = AlignedOffsetInBytes - FieldOffset/8;
+
+      if (NumPaddingBytes > 0) {
+        llvm::APInt pad(32, NumPaddingBytes);
+        FType = CGM.getContext().getConstantArrayType(CGM.getContext().CharTy,
+                                                     pad, ArrayType::Normal, 0);
+        FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+        FieldSize = CGM.getContext().getTypeSize(FType);
+        FieldAlign = CGM.getContext().getTypeAlign(FType);
+        FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member,
+                                                 Unit, "", DefUnit,
+                                                 0, FieldSize, FieldAlign,
+                                                 FieldOffset, 0, FieldTy);
+        EltTys.push_back(FieldTy);
+        FieldOffset += FieldSize;
+      }
+    }
+
+    FType = Type;
+    FieldTy = CGDebugInfo::getOrCreateType(FType, Unit);
+    FieldSize = CGM.getContext().getTypeSize(FType);
+    FieldAlign = Align.getQuantity()*8;
+    
+    XOffset = FieldOffset;
+    FieldTy = DebugFactory.CreateDerivedType(llvm::dwarf::DW_TAG_member, Unit,
+                                             VD->getName(), DefUnit,
+                                             0, FieldSize, FieldAlign,
+                                             FieldOffset, 0, FieldTy);
+    EltTys.push_back(FieldTy);
+    FieldOffset += FieldSize;
+
+    Elements = DebugFactory.GetOrCreateArray(EltTys.data(), EltTys.size());
+
+    unsigned Flags = llvm::DIType::FlagBlockByrefStruct;
+
+    Ty = DebugFactory.CreateCompositeType(Tag, Unit, "",
+                                          llvm::DICompileUnit(),
+                                          0, FieldOffset, 0, 0, Flags,
+                                          llvm::DIType(), Elements);
+  }
+
+  // Get location information.
+  SourceManager &SM = CGM.getContext().getSourceManager();
+  PresumedLoc PLoc = SM.getPresumedLoc(VD->getLocation());
+  unsigned Line = 0;
+  if (!PLoc.isInvalid())
+    Line = PLoc.getLine();
+  else
+    Unit = llvm::DICompileUnit();
+
+  CharUnits offset = CGF->BlockDecls[VD];
+  llvm::SmallVector<llvm::Value *, 9> addr;
+  const llvm::Type *Int64Ty = llvm::Type::getInt64Ty(CGM.getLLVMContext());
+  addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpDeref));
+  addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpPlus));
+  addr.push_back(llvm::ConstantInt::get(Int64Ty, offset.getQuantity()));
+  if (BDRE->isByRef()) {
+    addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpDeref));
+    addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpPlus));
+    // offset of __forwarding field
+    offset = CharUnits::fromQuantity(CGF->LLVMPointerWidth/8);
+    addr.push_back(llvm::ConstantInt::get(Int64Ty, offset.getQuantity()));
+    addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpDeref));
+    addr.push_back(llvm::ConstantInt::get(Int64Ty, llvm::DIFactory::OpPlus));
+    // offset of x field
+    offset = CharUnits::fromQuantity(XOffset/8);
+    addr.push_back(llvm::ConstantInt::get(Int64Ty, offset.getQuantity()));
+  }
+
+  // Create the descriptor for the variable.
+  llvm::DIVariable D =
+    DebugFactory.CreateComplexVariable(Tag,
+                                       llvm::DIDescriptor(RegionStack.back()),
+                                       VD->getName(), Unit, Line, Ty,
+                                       addr);
+  // Insert an llvm.dbg.declare into the current block.
+  llvm::Instruction *Call = 
+    DebugFactory.InsertDeclare(Storage, D, Builder.GetInsertBlock());
+
+  llvm::DIScope DS(RegionStack.back());
+  llvm::DILocation DO(NULL);
+  llvm::DILocation DL = 
+    DebugFactory.CreateLocation(Line, PLoc.getColumn(), DS, DO);
+  
+  Call->setMetadata("dbg", DL.getNode());
+}
+
+void CGDebugInfo::EmitDeclareOfAutoVariable(const VarDecl *VD,
+                                            llvm::Value *Storage,
+                                            CGBuilderTy &Builder) {
+  EmitDeclare(VD, llvm::dwarf::DW_TAG_auto_variable, Storage, Builder);
+}
+
+void CGDebugInfo::EmitDeclareOfBlockDeclRefVariable(
+  const BlockDeclRefExpr *BDRE, llvm::Value *Storage, CGBuilderTy &Builder,
+  CodeGenFunction *CGF) {
+  EmitDeclare(BDRE, llvm::dwarf::DW_TAG_auto_variable, Storage, Builder, CGF);
+}
+
+/// EmitDeclareOfArgVariable - Emit call to llvm.dbg.declare for an argument
+/// variable declaration.
+void CGDebugInfo::EmitDeclareOfArgVariable(const VarDecl *VD, llvm::Value *AI,
+                                           CGBuilderTy &Builder) {
+  EmitDeclare(VD, llvm::dwarf::DW_TAG_arg_variable, AI, Builder);
+}
+
+
+
+/// EmitGlobalVariable - Emit information about a global variable.
+void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
+                                     const VarDecl *D) {
+  
+  // Create global variable debug descriptor.
+  llvm::DICompileUnit Unit = getOrCreateCompileUnit(D->getLocation());
+  SourceManager &SM = CGM.getContext().getSourceManager();
+  PresumedLoc PLoc = SM.getPresumedLoc(D->getLocation());
+  unsigned LineNo = PLoc.isInvalid() ? 0 : PLoc.getLine();
+
+  QualType T = D->getType();
+  if (T->isIncompleteArrayType()) {
+
+    // CodeGen turns int[] into int[1] so we'll do the same here.
+    llvm::APSInt ConstVal(32);
+
+    ConstVal = 1;
+    QualType ET = CGM.getContext().getAsArrayType(T)->getElementType();
+
+    T = CGM.getContext().getConstantArrayType(ET, ConstVal,
+                                           ArrayType::Normal, 0);
+  }
+  llvm::StringRef DeclName = D->getName();
+  llvm::DIDescriptor DContext = 
+    getContextDescriptor(dyn_cast<Decl>(D->getDeclContext()), Unit);
+  DebugFactory.CreateGlobalVariable(DContext, DeclName,
+                                    DeclName, llvm::StringRef(), Unit, LineNo,
+                                    getOrCreateType(T, Unit),
+                                    Var->hasInternalLinkage(),
+                                    true/*definition*/, Var);
+}
+
+/// EmitGlobalVariable - Emit information about an objective-c interface.
+void CGDebugInfo::EmitGlobalVariable(llvm::GlobalVariable *Var,
+                                     ObjCInterfaceDecl *ID) {
+  // Create global variable debug descriptor.
+  llvm::DICompileUnit Unit = getOrCreateCompileUnit(ID->getLocation());
+  SourceManager &SM = CGM.getContext().getSourceManager();
+  PresumedLoc PLoc = SM.getPresumedLoc(ID->getLocation());
+  unsigned LineNo = PLoc.isInvalid() ? 0 : PLoc.getLine();
+
+  llvm::StringRef Name = ID->getName();
+
+  QualType T = CGM.getContext().getObjCInterfaceType(ID);
+  if (T->isIncompleteArrayType()) {
+
+    // CodeGen turns int[] into int[1] so we'll do the same here.
+    llvm::APSInt ConstVal(32);
+
+    ConstVal = 1;
+    QualType ET = CGM.getContext().getAsArrayType(T)->getElementType();
+
+    T = CGM.getContext().getConstantArrayType(ET, ConstVal,
+                                           ArrayType::Normal, 0);
+  }
+
+  DebugFactory.CreateGlobalVariable(Unit, Name, Name, Name, Unit, LineNo,
+                                    getOrCreateType(T, Unit),
+                                    Var->hasInternalLinkage(),
+                                    true/*definition*/, Var);
+}
+
+/// getOrCreateNamesSpace - Return namespace descriptor for the given
+/// namespace decl.
+llvm::DINameSpace 
+CGDebugInfo::getOrCreateNameSpace(const NamespaceDecl *NSDecl, 
+                                  llvm::DIDescriptor Unit) {
+  llvm::DenseMap<const NamespaceDecl *, llvm::WeakVH>::iterator I = 
+    NameSpaceCache.find(NSDecl);
+  if (I != NameSpaceCache.end())
+    return llvm::DINameSpace(cast<llvm::MDNode>(I->second));
+  
+  SourceManager &SM = CGM.getContext().getSourceManager();
+  PresumedLoc PLoc = SM.getPresumedLoc(NSDecl->getLocation());
+  unsigned LineNo = PLoc.isInvalid() ? 0 : PLoc.getLine();
+
+  llvm::DIDescriptor Context = 
+    getContextDescriptor(dyn_cast<Decl>(NSDecl->getDeclContext()), Unit);
+  llvm::DINameSpace NS =
+    DebugFactory.CreateNameSpace(Context, NSDecl->getName(), 
+	llvm::DICompileUnit(Unit.getNode()), LineNo);
+  NameSpaceCache[NSDecl] = llvm::WeakVH(NS.getNode());
+  return NS;
+}