diff --git a/llvm/include/llvm/Analysis/DebugInfo.h b/llvm/include/llvm/Analysis/DebugInfo.h
index 4e8c4c85bfe4..d68bfa3c0dfe 100644
--- a/llvm/include/llvm/Analysis/DebugInfo.h
+++ b/llvm/include/llvm/Analysis/DebugInfo.h
@@ -31,8 +31,6 @@ namespace llvm {
   class Type;
   class Value;
   class DbgDeclareInst;
-  class DebugLoc;
-  struct DebugLocTracker;
   class Instruction;
   class MDNode;
   class LLVMContext;
@@ -710,11 +708,6 @@ namespace llvm {
                        std::string &Type, unsigned &LineNo, std::string &File,
                        std::string &Dir);
 
-  /// ExtractDebugLocation - Extract debug location information
-  /// from DILocation.
-  DebugLoc ExtractDebugLocation(DILocation &Loc,
-                                DebugLocTracker &DebugLocInfo);
-
   /// getDISubprogram - Find subprogram that is enclosing this scope.
   DISubprogram getDISubprogram(MDNode *Scope);
 
diff --git a/llvm/include/llvm/CodeGen/MachineFunction.h b/llvm/include/llvm/CodeGen/MachineFunction.h
index 76ec9db5510d..59b171850d0d 100644
--- a/llvm/include/llvm/CodeGen/MachineFunction.h
+++ b/llvm/include/llvm/CodeGen/MachineFunction.h
@@ -26,7 +26,6 @@
 
 namespace llvm {
 
-class DILocation;
 class Value;
 class Function;
 class MachineRegisterInfo;
@@ -112,9 +111,6 @@ class MachineFunction {
   // of a function.
   DebugLoc DefaultDebugLoc;
 
-  // Tracks debug locations.
-  DebugLocTracker DebugLocInfo;
-
   /// FunctionNumber - This provides a unique ID for each function emitted in
   /// this translation unit.
   ///
@@ -402,9 +398,6 @@ public:
   // Debug location.
   //
 
-  /// getDILocation - Get the DILocation for a given DebugLoc object.
-  DILocation getDILocation(DebugLoc DL) const;
-
   /// getDefaultDebugLoc - Get the default debug location for the machine
   /// function.
   DebugLoc getDefaultDebugLoc() const { return DefaultDebugLoc; }
@@ -412,9 +405,6 @@ public:
   /// setDefaultDebugLoc - Get the default debug location for the machine
   /// function.
   void setDefaultDebugLoc(DebugLoc DL) { DefaultDebugLoc = DL; }
-
-  /// getDebugLocInfo - Get the debug info location tracker.
-  DebugLocTracker &getDebugLocInfo() { return DebugLocInfo; }
 };
 
 //===--------------------------------------------------------------------===//
diff --git a/llvm/include/llvm/CodeGen/MachineModuleInfo.h b/llvm/include/llvm/CodeGen/MachineModuleInfo.h
index d446eaeb7f49..d610390b6357 100644
--- a/llvm/include/llvm/CodeGen/MachineModuleInfo.h
+++ b/llvm/include/llvm/CodeGen/MachineModuleInfo.h
@@ -37,6 +37,7 @@
 #include "llvm/CodeGen/MachineLocation.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/Support/Dwarf.h"
+#include "llvm/Support/DebugLoc.h"
 #include "llvm/Support/ValueHandle.h"
 #include "llvm/System/DataTypes.h"
 #include "llvm/ADT/DenseMap.h"
@@ -156,8 +157,8 @@ class MachineModuleInfo : public ImmutablePass {
 public:
   static char ID; // Pass identification, replacement for typeid
 
-  typedef std::pair<unsigned, TrackingVH<MDNode> > UnsignedAndMDNodePair;
-  typedef SmallVector< std::pair<TrackingVH<MDNode>, UnsignedAndMDNodePair>, 4>
+  typedef std::pair<unsigned, DebugLoc> UnsignedDebugLocPair;
+  typedef SmallVector<std::pair<TrackingVH<MDNode>, UnsignedDebugLocPair>, 4>
     VariableDbgInfoMapTy;
   VariableDbgInfoMapTy VariableDbgInfo;
 
@@ -330,10 +331,10 @@ public:
   /// of one is required to emit exception handling info.
   Function *getPersonality() const;
 
-  /// setVariableDbgInfo - Collect information used to emit debugging information
-  /// of a variable.
-  void setVariableDbgInfo(MDNode *N, unsigned Slot, MDNode *Scope) {
-    VariableDbgInfo.push_back(std::make_pair(N, std::make_pair(Slot, Scope)));
+  /// setVariableDbgInfo - Collect information used to emit debugging
+  /// information of a variable.
+  void setVariableDbgInfo(MDNode *N, unsigned Slot, DebugLoc Loc) {
+    VariableDbgInfo.push_back(std::make_pair(N, std::make_pair(Slot, Loc)));
   }
 
   VariableDbgInfoMapTy &getVariableDbgInfo() {  return VariableDbgInfo;  }
diff --git a/llvm/include/llvm/Support/DebugLoc.h b/llvm/include/llvm/Support/DebugLoc.h
index ede1ed305450..2da632c342bf 100644
--- a/llvm/include/llvm/Support/DebugLoc.h
+++ b/llvm/include/llvm/Support/DebugLoc.h
@@ -77,44 +77,16 @@ namespace llvm {
       return LineCol == DL.LineCol && ScopeIdx == DL.ScopeIdx;
     }
     bool operator!=(const NewDebugLoc &DL) const { return !(*this == DL); }
+    
+    
+    
+    
+    static NewDebugLoc getUnknownLoc() { NewDebugLoc L; return L; }
   };
   
   
+  typedef NewDebugLoc DebugLoc;
 
-  /// DebugLoc - Debug location id. This is carried by SDNode and MachineInstr
-  /// to index into a vector of unique debug location tuples.
-  class DebugLoc {
-    unsigned Idx;
-  public:
-    DebugLoc() : Idx(~0U) {}  // Defaults to invalid.
-
-    static DebugLoc getUnknownLoc()   { DebugLoc L; L.Idx = ~0U; return L; }
-    static DebugLoc get(unsigned idx) { DebugLoc L; L.Idx = idx; return L; }
-
-    unsigned getIndex() const { return Idx; }
-
-    /// isUnknown - Return true if there is no debug info for the SDNode /
-    /// MachineInstr.
-    bool isUnknown() const { return Idx == ~0U; }
-
-    bool operator==(const DebugLoc &DL) const { return Idx == DL.Idx; }
-    bool operator!=(const DebugLoc &DL) const { return !(*this == DL); }
-  };
-
-  /// DebugLocTracker - This class tracks debug location information.
-  ///
-  struct DebugLocTracker {
-    /// DebugLocations - A vector of unique DebugLocTuple's.
-    ///
-    std::vector<MDNode *> DebugLocations;
-
-    /// DebugIdMap - This maps DebugLocTuple's to indices into the
-    /// DebugLocations vector.
-    DenseMap<MDNode *, unsigned> DebugIdMap;
-
-    DebugLocTracker() {}
-  };
-  
 } // end namespace llvm
 
 #endif /* LLVM_DEBUGLOC_H */
diff --git a/llvm/lib/Analysis/DebugInfo.cpp b/llvm/lib/Analysis/DebugInfo.cpp
index f12552d9e400..0bafd6562fb6 100644
--- a/llvm/lib/Analysis/DebugInfo.cpp
+++ b/llvm/lib/Analysis/DebugInfo.cpp
@@ -24,7 +24,6 @@
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/Support/Debug.h"
 #include "llvm/Support/Dwarf.h"
-#include "llvm/Support/DebugLoc.h"
 #include "llvm/Support/raw_ostream.h"
 using namespace llvm;
 using namespace llvm::dwarf;
@@ -1372,23 +1371,6 @@ bool llvm::getLocationInfo(const Value *V, std::string &DisplayName,
   return true;
 }
 
-/// ExtractDebugLocation - Extract debug location information
-/// from DILocation.
-DebugLoc llvm::ExtractDebugLocation(DILocation &Loc,
-                                    DebugLocTracker &DebugLocInfo) {
-  DenseMap<MDNode *, unsigned>::iterator II
-    = DebugLocInfo.DebugIdMap.find(Loc.getNode());
-  if (II != DebugLocInfo.DebugIdMap.end())
-    return DebugLoc::get(II->second);
-
-  // Add a new location entry.
-  unsigned Id = DebugLocInfo.DebugLocations.size();
-  DebugLocInfo.DebugLocations.push_back(Loc.getNode());
-  DebugLocInfo.DebugIdMap[Loc.getNode()] = Id;
-
-  return DebugLoc::get(Id);
-}
-
 /// getDISubprogram - Find subprogram that is enclosing this scope.
 DISubprogram llvm::getDISubprogram(MDNode *Scope) {
   DIDescriptor D(Scope);
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 3e71d18b5261..625a2b95f205 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -340,19 +340,17 @@ static void EmitComments(const MachineInstr &MI, raw_ostream &CommentOS) {
   const MachineFunction *MF = MI.getParent()->getParent();
   const TargetMachine &TM = MF->getTarget();
   
-  if (!MI.getDebugLoc().isUnknown()) {
-    DILocation DLT = MF->getDILocation(MI.getDebugLoc());
-    
-    // Print source line info.
-    DIScope Scope = DLT.getScope();
+  DebugLoc DL = MI.getDebugLoc();
+  if (!DL.isUnknown()) {          // Print source line info.
+    DIScope Scope(DL.getScope(MF->getFunction()->getContext()));
     // Omit the directory, because it's likely to be long and uninteresting.
     if (Scope.Verify())
       CommentOS << Scope.getFilename();
     else
       CommentOS << "<unknown>";
-    CommentOS << ':' << DLT.getLineNumber();
-    if (DLT.getColumnNumber() != 0)
-      CommentOS << ':' << DLT.getColumnNumber();
+    CommentOS << ':' << DL.getLine();
+    if (DL.getCol() != 0)
+      CommentOS << ':' << DL.getCol();
     CommentOS << '\n';
   }
   
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index fb91d4f9849f..9084456c8f4d 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -302,7 +302,7 @@ DwarfDebug::DwarfDebug(raw_ostream &OS, AsmPrinter *A, const MCAsmInfo *T)
   : DwarfPrinter(OS, A, T), ModuleCU(0),
     AbbreviationsSet(InitAbbreviationsSetSize), Abbreviations(),
     DIEBlocks(), SectionSourceLines(), didInitial(false), shouldEmit(false),
-    CurrentFnDbgScope(0), PrevDILoc(0), DebugTimer(0) {
+    CurrentFnDbgScope(0), DebugTimer(0) {
   NextStringPoolNumber = 0;
   if (TimePassesIsEnabled)
     DebugTimer = new Timer("Dwarf Debug Writer");
@@ -1932,13 +1932,14 @@ void DwarfDebug::endModule() {
 /// findAbstractVariable - Find abstract variable, if any, associated with Var.
 DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &Var,
                                               unsigned FrameIdx,
-                                              DILocation &ScopeLoc) {
+                                              DebugLoc ScopeLoc) {
 
   DbgVariable *AbsDbgVariable = AbstractVariables.lookup(Var.getNode());
   if (AbsDbgVariable)
     return AbsDbgVariable;
 
-  DbgScope *Scope = AbstractScopes.lookup(ScopeLoc.getScope().getNode());
+  LLVMContext &Ctx = Var.getNode()->getContext();
+  DbgScope *Scope = AbstractScopes.lookup(ScopeLoc.getScope(Ctx));
   if (!Scope)
     return NULL;
 
@@ -1953,13 +1954,14 @@ DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &Var,
 /// FIXME : Refactor findAbstractVariable.
 DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &Var,
                                               const MachineInstr *MI,
-                                              DILocation &ScopeLoc) {
+                                              DebugLoc ScopeLoc) {
 
   DbgVariable *AbsDbgVariable = AbstractVariables.lookup(Var.getNode());
   if (AbsDbgVariable)
     return AbsDbgVariable;
 
-  DbgScope *Scope = AbstractScopes.lookup(ScopeLoc.getScope().getNode());
+  LLVMContext &Ctx = Var.getNode()->getContext();
+  DbgScope *Scope = AbstractScopes.lookup(ScopeLoc.getScope(Ctx));
   if (!Scope)
     return NULL;
 
@@ -1975,24 +1977,27 @@ DbgVariable *DwarfDebug::findAbstractVariable(DIVariable &Var,
 void DwarfDebug::collectVariableInfo() {
   if (!MMI) return;
 
+  const LLVMContext &Ctx = MF->getFunction()->getContext();
+
   MachineModuleInfo::VariableDbgInfoMapTy &VMap = MMI->getVariableDbgInfo();
   for (MachineModuleInfo::VariableDbgInfoMapTy::iterator VI = VMap.begin(),
          VE = VMap.end(); VI != VE; ++VI) {
     MDNode *Var = VI->first;
     if (!Var) continue;
-    DIVariable DV (Var);
-    std::pair< unsigned, MDNode *> VP = VI->second;
-    DILocation ScopeLoc(VP.second);
+    DIVariable DV(Var);
+    const std::pair<unsigned, DebugLoc> &VP = VI->second;
 
-    DbgScope *Scope =
-      ConcreteScopes.lookup(ScopeLoc.getOrigLocation().getNode());
-    if (!Scope)
-      Scope = DbgScopeMap.lookup(ScopeLoc.getScope().getNode());
+    DbgScope *Scope = 0;
+    if (MDNode *IA = VP.second.getInlinedAt(Ctx))
+      Scope = ConcreteScopes.lookup(IA);
+    if (Scope == 0)
+      Scope = DbgScopeMap.lookup(VP.second.getScope(Ctx));
+    
     // If variable scope is not found then skip this variable.
-    if (!Scope)
+    if (Scope == 0)
       continue;
 
-    DbgVariable *AbsDbgVariable = findAbstractVariable(DV, VP.first, ScopeLoc);
+    DbgVariable *AbsDbgVariable = findAbstractVariable(DV, VP.first, VP.second);
     DbgVariable *RegVar = new DbgVariable(DV, VP.first, AbsDbgVariable);
     Scope->addVariable(RegVar);
   }
@@ -2021,16 +2026,17 @@ void DwarfDebug::collectVariableInfo() {
 
       DebugLoc DL = MInsn->getDebugLoc();
       if (DL.isUnknown()) continue;
-      DILocation ScopeLoc = MF->getDILocation(DL);
-      DbgScope *Scope =
-        ConcreteScopes.lookup(ScopeLoc.getOrigLocation().getNode());
-      if (!Scope)
-        Scope = DbgScopeMap.lookup(ScopeLoc.getScope().getNode());
+      DbgScope *Scope = 0;
+      if (MDNode *IA = DL.getInlinedAt(Ctx))
+        Scope = ConcreteScopes.lookup(IA);
+      if (Scope == 0)
+        Scope = DbgScopeMap.lookup(DL.getScope(Ctx));
+      
       // If variable scope is not found then skip this variable.
-      if (!Scope)
+      if (Scope == 0)
         continue;
 
-      DbgVariable *AbsDbgVariable = findAbstractVariable(DV, MInsn, ScopeLoc);
+      DbgVariable *AbsDbgVariable = findAbstractVariable(DV, MInsn, DL);
       DbgVariable *RegVar = new DbgVariable(DV, MInsn, AbsDbgVariable);
       DbgValueStartMap[MInsn] = RegVar;
       Scope->addVariable(RegVar);
@@ -2044,12 +2050,15 @@ void DwarfDebug::beginScope(const MachineInstr *MI) {
   DebugLoc DL = MI->getDebugLoc();
   if (DL.isUnknown())
     return;
-  DILocation DILoc = MF->getDILocation(DL);
-  if (!DILoc.getScope().Verify())
-    return;
 
   // Check and update last known location info.
-  if(DILoc.getNode() == PrevDILoc)
+  if (DL == PrevInstLoc)
+    return;
+  
+  MDNode *Scope = DL.getScope(MF->getFunction()->getContext());
+  
+  // FIXME: Should only verify each scope once!
+  if (!DIScope(Scope).Verify())
     return;
 
   // DBG_VALUE instruction establishes new value.
@@ -2057,10 +2066,8 @@ void DwarfDebug::beginScope(const MachineInstr *MI) {
     DenseMap<const MachineInstr *, DbgVariable *>::iterator DI
       = DbgValueStartMap.find(MI);
     if (DI != DbgValueStartMap.end()) {
-      MCSymbol *Label = recordSourceLine(DILoc.getLineNumber(),
-                                         DILoc.getColumnNumber(),
-                                         DILoc.getScope().getNode());
-      PrevDILoc = DILoc.getNode();
+      MCSymbol *Label = recordSourceLine(DL.getLine(), DL.getCol(), Scope);
+      PrevInstLoc = DL;
       DI->second->setDbgValueLabel(Label);
     }
     return;
@@ -2068,10 +2075,8 @@ void DwarfDebug::beginScope(const MachineInstr *MI) {
 
   // Emit a label to indicate location change. This is used for line 
   // table even if this instruction does start a new scope.
-  MCSymbol *Label = recordSourceLine(DILoc.getLineNumber(),
-                                     DILoc.getColumnNumber(),
-                                     DILoc.getScope().getNode());
-  PrevDILoc = DILoc.getNode();
+  MCSymbol *Label = recordSourceLine(DL.getLine(), DL.getCol(), Scope);
+  PrevInstLoc = DL;
 
   // update DbgScope if this instruction starts a new scope.
   InsnToDbgScopeMapTy::iterator I = DbgScopeBeginMap.find(MI);
@@ -2094,15 +2099,12 @@ void DwarfDebug::endScope(const MachineInstr *MI) {
   DebugLoc DL = MI->getDebugLoc();
   if (DL.isUnknown())
     return;
-  DILocation DILoc = MF->getDILocation(DL);
-  if (!DILoc.getScope().Verify())
-    return;
-  
+
   // Emit a label and update DbgScope if this instruction ends a scope.
   InsnToDbgScopeMapTy::iterator I = DbgScopeEndMap.find(MI);
   if (I == DbgScopeEndMap.end())
     return;
-
+  
   MCSymbol *Label = MMI->getContext().CreateTempSymbol();
   Asm->OutStreamer.EmitLabel(Label);
 
@@ -2115,7 +2117,6 @@ void DwarfDebug::endScope(const MachineInstr *MI) {
 
 /// createDbgScope - Create DbgScope for the scope.
 void DwarfDebug::createDbgScope(MDNode *Scope, MDNode *InlinedAt) {
-
   if (!InlinedAt) {
     DbgScope *WScope = DbgScopeMap.lookup(Scope);
     if (WScope)
@@ -2147,6 +2148,8 @@ bool DwarfDebug::extractScopeInformation() {
 
   DenseMap<const MachineInstr *, unsigned> MIIndexMap;
   unsigned MIIndex = 0;
+  LLVMContext &Ctx = MF->getFunction()->getContext();
+  
   // Scan each instruction and create scopes. First build working set of scopes.
   for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
        I != E; ++I) {
@@ -2156,16 +2159,17 @@ bool DwarfDebug::extractScopeInformation() {
       // FIXME : Remove DBG_VALUE check.
       if (MInsn->isDebugValue()) continue;
       MIIndexMap[MInsn] = MIIndex++;
+      
       DebugLoc DL = MInsn->getDebugLoc();
       if (DL.isUnknown()) continue;
-      DILocation DLT = MF->getDILocation(DL);
-      DIScope DLTScope = DLT.getScope();
-      if (!DLTScope.getNode()) continue;
+      
+      MDNode *Scope = DL.getScope(Ctx);
+      
       // There is no need to create another DIE for compile unit. For all
       // other scopes, create one DbgScope now. This will be translated
       // into a scope DIE at the end.
-      if (DLTScope.isCompileUnit()) continue;
-      createDbgScope(DLTScope.getNode(), DLT.getOrigLocation().getNode());
+      if (DIScope(Scope).isCompileUnit()) continue;
+      createDbgScope(Scope, DL.getInlinedAt(Ctx));
     }
   }
 
@@ -2179,17 +2183,17 @@ bool DwarfDebug::extractScopeInformation() {
       // FIXME : Remove DBG_VALUE check.
       if (MInsn->isDebugValue()) continue;
       DebugLoc DL = MInsn->getDebugLoc();
-      if (DL.isUnknown())  continue;
-      DILocation DLT = MF->getDILocation(DL);
-      DIScope DLTScope = DLT.getScope();
-      if (!DLTScope.getNode()) continue;
+      if (DL.isUnknown()) continue;
+
+      MDNode *Scope = DL.getScope(Ctx);
+      if (Scope == 0) continue;
+      
       // There is no need to create another DIE for compile unit. For all
       // other scopes, create one DbgScope now. This will be translated
       // into a scope DIE at the end.
-      if (DLTScope.isCompileUnit()) continue;
-      DbgScope *Scope = getUpdatedDbgScope(DLTScope.getNode(), MInsn, 
-                                           DLT.getOrigLocation().getNode());
-      Scope->setLastInsn(MInsn);
+      if (DIScope(Scope).isCompileUnit()) continue;
+      DbgScope *DScope = getUpdatedDbgScope(Scope, MInsn, DL.getInlinedAt(Ctx));
+      DScope->setLastInsn(MInsn);
     }
   }
 
@@ -2255,20 +2259,21 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
   // Emit label for the implicitly defined dbg.stoppoint at the start of the
   // function.
   DebugLoc FDL = MF->getDefaultDebugLoc();
-  if (!FDL.isUnknown()) {
-    DILocation DLT = MF->getDILocation(FDL);
-    DISubprogram SP = getDISubprogram(DLT.getScope().getNode());
-    unsigned Line, Col;
-    if (SP.Verify()) {
-      Line = SP.getLineNumber();
-      Col = 0;
-    } else {
-      Line = DLT.getLineNumber();
-      Col = DLT.getColumnNumber();
-    }
-    
-    recordSourceLine(Line, Col, DLT.getScope().getNode());
+  if (FDL.isUnknown()) return;
+  
+  MDNode *Scope = FDL.getScope(MF->getFunction()->getContext());
+  
+  DISubprogram SP = getDISubprogram(Scope);
+  unsigned Line, Col;
+  if (SP.Verify()) {
+    Line = SP.getLineNumber();
+    Col = 0;
+  } else {
+    Line = FDL.getLine();
+    Col = FDL.getCol();
   }
+  
+  recordSourceLine(Line, Col, Scope);
 }
 
 /// endFunction - Gather and emit post-function debug information.
diff --git a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
index ad6b0c2cb7cd..03d9d9935f2f 100644
--- a/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -195,7 +195,7 @@ class DwarfDebug : public DwarfPrinter {
 
   /// Previous instruction's location information. This is used to determine
   /// label location to indicate scope boundries in dwarf debug info.
-  mutable const MDNode *PrevDILoc;
+  DebugLoc PrevInstLoc;
 
   /// DebugTimer - Timer for the Dwarf debug writer.
   Timer *DebugTimer;
@@ -361,7 +361,8 @@ class DwarfDebug : public DwarfPrinter {
 
   /// getUpdatedDbgScope - Find or create DbgScope assicated with 
   /// the instruction. Initialize scope and update scope hierarchy.
-  DbgScope *getUpdatedDbgScope(MDNode *N, const MachineInstr *MI, MDNode *InlinedAt);
+  DbgScope *getUpdatedDbgScope(MDNode *N, const MachineInstr *MI,
+                               MDNode *InlinedAt);
 
   /// createDbgScope - Create DbgScope for the scope.
   void createDbgScope(MDNode *Scope, MDNode *InlinedAt);
@@ -370,9 +371,9 @@ class DwarfDebug : public DwarfPrinter {
 
   /// findAbstractVariable - Find abstract variable associated with Var.
   DbgVariable *findAbstractVariable(DIVariable &Var, unsigned FrameIdx, 
-                                    DILocation &Loc);
+                                    DebugLoc Loc);
   DbgVariable *findAbstractVariable(DIVariable &Var, const MachineInstr *MI,
-                                    DILocation &Loc);
+                                    DebugLoc Loc);
 
   /// updateSubprogramScopeDIE - Find DIE for the given subprogram and 
   /// attach appropriate DW_AT_low_pc and DW_AT_high_pc attributes.
diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp
index f6cc71f3a437..edc6d8dc6fa9 100644
--- a/llvm/lib/CodeGen/MachineFunction.cpp
+++ b/llvm/lib/CodeGen/MachineFunction.cpp
@@ -436,15 +436,6 @@ unsigned MachineFunction::addLiveIn(unsigned PReg,
   return VReg;
 }
 
-/// getDILocation - Get the DILocation for a given DebugLoc object.
-DILocation MachineFunction::getDILocation(DebugLoc DL) const {
-  unsigned Idx = DL.getIndex();
-  assert(Idx < DebugLocInfo.DebugLocations.size() &&
-         "Invalid index into debug locations!");
-  return DILocation(DebugLocInfo.DebugLocations[Idx]);
-}
-
-
 /// getJTISymbol - Return the MCSymbol for the specified non-empty jump table.
 /// If isLinkerPrivate is specified, an 'l' label is returned, otherwise a
 /// normal 'L' label is returned.
diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index 40d6b2093be7..2ac76f34abb6 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -1221,17 +1221,16 @@ void MachineInstr::print(raw_ostream &OS, const TargetMachine *TM) const {
 
     // TODO: print InlinedAtLoc information
 
-    DILocation DLT = MF->getDILocation(debugLoc);
-    DIScope Scope = DLT.getScope();
+    DIScope Scope(debugLoc.getScope(MF->getFunction()->getContext()));
     OS << " dbg:";
     // Omit the directory, since it's usually long and uninteresting.
     if (Scope.Verify())
       OS << Scope.getFilename();
     else
       OS << "<unknown>";
-    OS << ':' << DLT.getLineNumber();
-    if (DLT.getColumnNumber() != 0)
-      OS << ':' << DLT.getColumnNumber();
+    OS << ':' << debugLoc.getLine();
+    if (debugLoc.getCol() != 0)
+      OS << ':' << debugLoc.getCol();
   }
 
   OS << "\n";
diff --git a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
index e4e9ef405f63..d6f8a205c1f6 100644
--- a/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/FastISel.cpp
@@ -340,8 +340,8 @@ bool FastISel::SelectCall(User *I) {
       StaticAllocaMap.find(AI);
     if (SI == StaticAllocaMap.end()) break; // VLAs.
     int FI = SI->second;
-    if (MDNode *Dbg = DI->getDbgMetadata())
-      MMI->setVariableDbgInfo(DI->getVariable(), FI, Dbg);
+    if (!DI->getDebugLoc().isUnknown())
+      MMI->setVariableDbgInfo(DI->getVariable(), FI, DI->getDebugLoc());
     
     // Building the map above is target independent.  Generating DBG_VALUE
     // inline is target dependent; do this now.
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
index 922c6e8b02a9..59ac24b186ad 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
@@ -3800,8 +3800,8 @@ SelectionDAGBuilder::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
     int FI = SI->second;
 
     if (MachineModuleInfo *MMI = DAG.getMachineModuleInfo())
-      if (MDNode *Dbg = DI.getDbgMetadata())
-        MMI->setVariableDbgInfo(Variable, FI, Dbg);
+      if (!DI.getDebugLoc().isUnknown())
+        MMI->setVariableDbgInfo(Variable, FI, DI.getDebugLoc());
     return 0;
   }
   case Intrinsic::dbg_value: {
@@ -3851,9 +3851,10 @@ SelectionDAGBuilder::visitIntrinsicCall(CallInst &I, unsigned Intrinsic) {
     if (SI == FuncInfo.StaticAllocaMap.end())
       return 0; // VLAs.
     int FI = SI->second;
+    
     if (MachineModuleInfo *MMI = DAG.getMachineModuleInfo())
-      if (MDNode *Dbg = DI.getDbgMetadata())
-        MMI->setVariableDbgInfo(Variable, FI, Dbg);
+      if (!DI.getDebugLoc().isUnknown())
+        MMI->setVariableDbgInfo(Variable, FI, DI.getDebugLoc());
     return 0;
   }
   case Intrinsic::eh_exception: {
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
index ea96b2179999..963abd905fe9 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
@@ -368,21 +368,18 @@ bool SelectionDAGISel::runOnMachineFunction(MachineFunction &mf) {
 /// attached with this instruction.
 static void SetDebugLoc(Instruction *I, SelectionDAGBuilder *SDB,
                         FastISel *FastIS, MachineFunction *MF) {
-  MDNode *Dbg = I->getDbgMetadata();
-  if (Dbg == 0) return;
+  DebugLoc DL = I->getDebugLoc();
+  if (DL.isUnknown()) return;
   
-  DILocation DILoc(Dbg);
-  DebugLoc Loc = ExtractDebugLocation(DILoc, MF->getDebugLocInfo());
-
-  SDB->setCurDebugLoc(Loc);
+  SDB->setCurDebugLoc(DL);
 
   if (FastIS)
-    FastIS->setCurDebugLoc(Loc);
+    FastIS->setCurDebugLoc(DL);
 
   // If the function doesn't have a default debug location yet, set
   // it. This is kind of a hack.
   if (MF->getDefaultDebugLoc().isUnknown())
-    MF->setDefaultDebugLoc(Loc);
+    MF->setDefaultDebugLoc(DL);
 }
 
 /// ResetDebugLoc - Set MF's and SDB's DebugLocs to Unknown.
diff --git a/llvm/lib/ExecutionEngine/JIT/JITEmitter.cpp b/llvm/lib/ExecutionEngine/JIT/JITEmitter.cpp
index 83acb5df9768..a2df2d09b85c 100644
--- a/llvm/lib/ExecutionEngine/JIT/JITEmitter.cpp
+++ b/llvm/lib/ExecutionEngine/JIT/JITEmitter.cpp
@@ -821,21 +821,20 @@ void *JITEmitter::getPointerToGVIndirectSym(GlobalValue *V, void *Reference) {
 }
 
 void JITEmitter::processDebugLoc(DebugLoc DL, bool BeforePrintingInsn) {
-  if (!DL.isUnknown()) {
-    DILocation CurDLT = EmissionDetails.MF->getDILocation(DL);
+  if (DL.isUnknown()) return;
+  if (!BeforePrintingInsn) return;
 
-    if (BeforePrintingInsn) {
-      if (CurDLT.getScope().getNode() != 0 
-          && PrevDLT.getNode() != CurDLT.getNode()) {
-        JITEvent_EmittedFunctionDetails::LineStart NextLine;
-        NextLine.Address = getCurrentPCValue();
-        NextLine.Loc = DL;
-        EmissionDetails.LineStarts.push_back(NextLine);
-      }
-
-      PrevDLT = CurDLT;
-    }
+  // FIXME: This is horribly inefficient.
+  DILocation CurDLT(DL.getAsMDNode(CurFn->getContext()));
+  
+  if (CurDLT.getScope().getNode() != 0 && PrevDLT.getNode() !=CurDLT.getNode()){
+    JITEvent_EmittedFunctionDetails::LineStart NextLine;
+    NextLine.Address = getCurrentPCValue();
+    NextLine.Loc = DL;
+    EmissionDetails.LineStarts.push_back(NextLine);
   }
+
+  PrevDLT = CurDLT;
 }
 
 static unsigned GetConstantPoolSizeInBytes(MachineConstantPool *MCP,
diff --git a/llvm/lib/Target/PIC16/PIC16DebugInfo.cpp b/llvm/lib/Target/PIC16/PIC16DebugInfo.cpp
index da4e02787691..a223540170a7 100644
--- a/llvm/lib/Target/PIC16/PIC16DebugInfo.cpp
+++ b/llvm/lib/Target/PIC16/PIC16DebugInfo.cpp
@@ -256,15 +256,11 @@ void PIC16DbgInfo::BeginFunction(const MachineFunction &MF) {
 ///
 void PIC16DbgInfo::ChangeDebugLoc(const MachineFunction &MF,  
                                   const DebugLoc &DL, bool IsInBeginFunction) {
-  if (! EmitDebugDirectives) return;
-  assert (! DL.isUnknown()  && "can't change to invalid debug loc");
+  if (!EmitDebugDirectives) return;
+  assert(!DL.isUnknown() && "can't change to invalid debug loc");
 
-  DILocation Loc = MF.getDILocation(DL);
-  MDNode *CU = Loc.getScope().getNode();
-  unsigned line = Loc.getLineNumber();
-
-  SwitchToCU(CU);
-  SwitchToLine(line, IsInBeginFunction);
+  SwitchToCU(DL.getScope(MF.getFunction()->getContext()));
+  SwitchToLine(DL.getLine(), IsInBeginFunction);
 }
 
 /// SwitchToLine - Emit line directive for a new line.
diff --git a/llvm/lib/Target/PIC16/PIC16DebugInfo.h b/llvm/lib/Target/PIC16/PIC16DebugInfo.h
index 54e27c7c3377..4e5fb875cbe7 100644
--- a/llvm/lib/Target/PIC16/PIC16DebugInfo.h
+++ b/llvm/lib/Target/PIC16/PIC16DebugInfo.h
@@ -19,7 +19,7 @@
 
 namespace llvm {
   class MachineFunction;
-  class DebugLoc;
+  class NewDebugLoc; typedef NewDebugLoc DebugLoc;
   namespace PIC16Dbg {
     enum VarType {
       T_NULL,