diff --git a/include/llvm/DebugInfo.h b/include/llvm/DebugInfo.h
index f7e6434b4d7..74416db2175 100644
--- a/include/llvm/DebugInfo.h
+++ b/include/llvm/DebugInfo.h
@@ -110,7 +110,7 @@ namespace llvm {
       return !operator==(Other);
     }
 
-    unsigned getTag() const {
+    uint16_t getTag() const {
       return getUnsignedField(0) & ~LLVMDebugVersionMask;
     }
 
diff --git a/lib/CodeGen/AsmPrinter/DIE.cpp b/lib/CodeGen/AsmPrinter/DIE.cpp
index ab03861f9dd..a22fd6064df 100644
--- a/lib/CodeGen/AsmPrinter/DIE.cpp
+++ b/lib/CodeGen/AsmPrinter/DIE.cpp
@@ -122,7 +122,7 @@ DIE *DIE::getCompileUnit() {
   llvm_unreachable("We should not have orphaned DIEs.");
 }
 
-DIEValue *DIE::findAttribute(unsigned Attribute) {
+DIEValue *DIE::findAttribute(uint16_t Attribute) {
   const SmallVectorImpl<DIEValue *> &Values = getValues();
   const DIEAbbrev &Abbrevs = getAbbrev();
 
@@ -199,7 +199,7 @@ void DIEValue::dump() const {
 
 /// EmitValue - Emit integer of appropriate size.
 ///
-void DIEInteger::EmitValue(AsmPrinter *Asm, unsigned Form) const {
+void DIEInteger::EmitValue(AsmPrinter *Asm, uint16_t Form) const {
   unsigned Size = ~0U;
   switch (Form) {
   case dwarf::DW_FORM_flag_present:
@@ -231,7 +231,7 @@ void DIEInteger::EmitValue(AsmPrinter *Asm, unsigned Form) const {
 
 /// SizeOf - Determine size of integer value in bytes.
 ///
-unsigned DIEInteger::SizeOf(AsmPrinter *AP, unsigned Form) const {
+unsigned DIEInteger::SizeOf(AsmPrinter *AP, uint16_t Form) const {
   switch (Form) {
   case dwarf::DW_FORM_flag_present: return 0;
   case dwarf::DW_FORM_flag:  // Fall thru
@@ -266,13 +266,13 @@ void DIEInteger::print(raw_ostream &O) const {
 
 /// EmitValue - Emit expression value.
 ///
-void DIEExpr::EmitValue(AsmPrinter *AP, unsigned Form) const {
+void DIEExpr::EmitValue(AsmPrinter *AP, uint16_t Form) const {
   AP->OutStreamer.EmitValue(Expr, SizeOf(AP, Form));
 }
 
 /// SizeOf - Determine size of expression value in bytes.
 ///
-unsigned DIEExpr::SizeOf(AsmPrinter *AP, unsigned Form) const {
+unsigned DIEExpr::SizeOf(AsmPrinter *AP, uint16_t Form) const {
   if (Form == dwarf::DW_FORM_data4) return 4;
   if (Form == dwarf::DW_FORM_sec_offset) return 4;
   if (Form == dwarf::DW_FORM_strp) return 4;
@@ -292,13 +292,13 @@ void DIEExpr::print(raw_ostream &O) const {
 
 /// EmitValue - Emit label value.
 ///
-void DIELabel::EmitValue(AsmPrinter *AP, unsigned Form) const {
+void DIELabel::EmitValue(AsmPrinter *AP, uint16_t Form) const {
   AP->EmitLabelReference(Label, SizeOf(AP, Form));
 }
 
 /// SizeOf - Determine size of label value in bytes.
 ///
-unsigned DIELabel::SizeOf(AsmPrinter *AP, unsigned Form) const {
+unsigned DIELabel::SizeOf(AsmPrinter *AP, uint16_t Form) const {
   if (Form == dwarf::DW_FORM_data4) return 4;
   if (Form == dwarf::DW_FORM_sec_offset) return 4;
   if (Form == dwarf::DW_FORM_strp) return 4;
@@ -317,13 +317,13 @@ void DIELabel::print(raw_ostream &O) const {
 
 /// EmitValue - Emit delta value.
 ///
-void DIEDelta::EmitValue(AsmPrinter *AP, unsigned Form) const {
+void DIEDelta::EmitValue(AsmPrinter *AP, uint16_t Form) const {
   AP->EmitLabelDifference(LabelHi, LabelLo, SizeOf(AP, Form));
 }
 
 /// SizeOf - Determine size of delta value in bytes.
 ///
-unsigned DIEDelta::SizeOf(AsmPrinter *AP, unsigned Form) const {
+unsigned DIEDelta::SizeOf(AsmPrinter *AP, uint16_t Form) const {
   if (Form == dwarf::DW_FORM_data4) return 4;
   if (Form == dwarf::DW_FORM_strp) return 4;
   return AP->getDataLayout().getPointerSize();
@@ -341,13 +341,13 @@ void DIEDelta::print(raw_ostream &O) const {
 
 /// EmitValue - Emit string value.
 ///
-void DIEString::EmitValue(AsmPrinter *AP, unsigned Form) const {
+void DIEString::EmitValue(AsmPrinter *AP, uint16_t Form) const {
   Access->EmitValue(AP, Form);
 }
 
 /// SizeOf - Determine size of delta value in bytes.
 ///
-unsigned DIEString::SizeOf(AsmPrinter *AP, unsigned Form) const {
+unsigned DIEString::SizeOf(AsmPrinter *AP, uint16_t Form) const {
   return Access->SizeOf(AP, Form);
 }
 
@@ -364,7 +364,7 @@ void DIEString::print(raw_ostream &O) const {
 
 /// EmitValue - Emit debug information entry offset.
 ///
-void DIEEntry::EmitValue(AsmPrinter *AP, unsigned Form) const {
+void DIEEntry::EmitValue(AsmPrinter *AP, uint16_t Form) const {
   AP->EmitInt32(Entry->getOffset());
 }
 
@@ -402,7 +402,7 @@ unsigned DIEBlock::ComputeSize(AsmPrinter *AP) {
 
 /// EmitValue - Emit block data.
 ///
-void DIEBlock::EmitValue(AsmPrinter *Asm, unsigned Form) const {
+void DIEBlock::EmitValue(AsmPrinter *Asm, uint16_t Form) const {
   switch (Form) {
   default: llvm_unreachable("Improper form for block");
   case dwarf::DW_FORM_block1: Asm->EmitInt8(Size);    break;
@@ -418,7 +418,7 @@ void DIEBlock::EmitValue(AsmPrinter *Asm, unsigned Form) const {
 
 /// SizeOf - Determine size of block data in bytes.
 ///
-unsigned DIEBlock::SizeOf(AsmPrinter *AP, unsigned Form) const {
+unsigned DIEBlock::SizeOf(AsmPrinter *AP, uint16_t Form) const {
   switch (Form) {
   case dwarf::DW_FORM_block1: return Size + sizeof(int8_t);
   case dwarf::DW_FORM_block2: return Size + sizeof(int16_t);
diff --git a/lib/CodeGen/AsmPrinter/DIE.h b/lib/CodeGen/AsmPrinter/DIE.h
index bfd7d1daeed..6eaa6ee66ef 100644
--- a/lib/CodeGen/AsmPrinter/DIE.h
+++ b/lib/CodeGen/AsmPrinter/DIE.h
@@ -143,7 +143,7 @@ namespace llvm {
     // Accessors.
     DIEAbbrev &getAbbrev() { return Abbrev; }
     unsigned getAbbrevNumber() const { return Abbrev.getNumber(); }
-    unsigned getTag() const { return Abbrev.getTag(); }
+    uint16_t getTag() const { return Abbrev.getTag(); }
     unsigned getOffset() const { return Offset; }
     unsigned getSize() const { return Size; }
     const std::vector<DIE *> &getChildren() const { return Children; }
@@ -152,13 +152,13 @@ namespace llvm {
     /// Climb up the parent chain to get the compile unit DIE this DIE belongs
     /// to.
     DIE *getCompileUnit();
-    void setTag(unsigned Tag) { Abbrev.setTag(Tag); }
+    void setTag(uint16_t Tag) { Abbrev.setTag(Tag); }
     void setOffset(unsigned O) { Offset = O; }
     void setSize(unsigned S) { Size = S; }
 
     /// addValue - Add a value and attributes to a DIE.
     ///
-    void addValue(unsigned Attribute, unsigned Form, DIEValue *Value) {
+    void addValue(uint16_t Attribute, uint16_t Form, DIEValue *Value) {
       Abbrev.AddAttribute(Attribute, Form);
       Values.push_back(Value);
     }
@@ -177,7 +177,7 @@ namespace llvm {
 
     /// findAttribute - Find a value in the DIE with the attribute given, returns NULL
     /// if no such attribute exists.
-    DIEValue *findAttribute(unsigned Attribute);
+    DIEValue *findAttribute(uint16_t Attribute);
 
 #ifndef NDEBUG
     void print(raw_ostream &O, unsigned IndentCount = 0) const;
@@ -213,11 +213,11 @@ namespace llvm {
 
     /// EmitValue - Emit value via the Dwarf writer.
     ///
-    virtual void EmitValue(AsmPrinter *AP, unsigned Form) const = 0;
+    virtual void EmitValue(AsmPrinter *AP, uint16_t Form) const = 0;
 
     /// SizeOf - Return the size of a value in bytes.
     ///
-    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const = 0;
+    virtual unsigned SizeOf(AsmPrinter *AP, uint16_t Form) const = 0;
 
 #ifndef NDEBUG
     virtual void print(raw_ostream &O) const = 0;
@@ -235,7 +235,7 @@ namespace llvm {
 
     /// BestForm - Choose the best form for integer.
     ///
-    static unsigned BestForm(bool IsSigned, uint64_t Int) {
+    static uint16_t BestForm(bool IsSigned, uint64_t Int) {
       if (IsSigned) {
         const int64_t SignedInt = Int;
         if ((char)Int == SignedInt)     return dwarf::DW_FORM_data1;
@@ -251,13 +251,13 @@ namespace llvm {
 
     /// EmitValue - Emit integer of appropriate size.
     ///
-    virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
+    virtual void EmitValue(AsmPrinter *AP, uint16_t Form) const;
 
     uint64_t getValue() const { return Integer; }
 
     /// SizeOf - Determine size of integer value in bytes.
     ///
-    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
+    virtual unsigned SizeOf(AsmPrinter *AP, uint16_t Form) const;
 
     // Implement isa/cast/dyncast.
     static bool classof(const DIEValue *I) { return I->getType() == isInteger; }
@@ -277,7 +277,7 @@ namespace llvm {
 
     /// EmitValue - Emit expression value.
     ///
-    virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
+    virtual void EmitValue(AsmPrinter *AP, uint16_t Form) const;
 
     /// getValue - Get MCExpr.
     ///
@@ -285,7 +285,7 @@ namespace llvm {
 
     /// SizeOf - Determine size of expression value in bytes.
     ///
-    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
+    virtual unsigned SizeOf(AsmPrinter *AP, uint16_t Form) const;
 
     // Implement isa/cast/dyncast.
     static bool classof(const DIEValue *E) { return E->getType() == isExpr; }
@@ -305,7 +305,7 @@ namespace llvm {
 
     /// EmitValue - Emit label value.
     ///
-    virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
+    virtual void EmitValue(AsmPrinter *AP, uint16_t Form) const;
 
     /// getValue - Get MCSymbol.
     ///
@@ -313,7 +313,7 @@ namespace llvm {
 
     /// SizeOf - Determine size of label value in bytes.
     ///
-    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
+    virtual unsigned SizeOf(AsmPrinter *AP, uint16_t Form) const;
 
     // Implement isa/cast/dyncast.
     static bool classof(const DIEValue *L) { return L->getType() == isLabel; }
@@ -335,11 +335,11 @@ namespace llvm {
 
     /// EmitValue - Emit delta value.
     ///
-    virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
+    virtual void EmitValue(AsmPrinter *AP, uint16_t Form) const;
 
     /// SizeOf - Determine size of delta value in bytes.
     ///
-    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
+    virtual unsigned SizeOf(AsmPrinter *AP, uint16_t Form) const;
 
     // Implement isa/cast/dyncast.
     static bool classof(const DIEValue *D) { return D->getType() == isDelta; }
@@ -365,11 +365,11 @@ namespace llvm {
 
     /// EmitValue - Emit delta value.
     ///
-    virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
+    virtual void EmitValue(AsmPrinter *AP, uint16_t Form) const;
 
     /// SizeOf - Determine size of delta value in bytes.
     ///
-    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
+    virtual unsigned SizeOf(AsmPrinter *AP, uint16_t Form) const;
 
     // Implement isa/cast/dyncast.
     static bool classof(const DIEValue *D) { return D->getType() == isString; }
@@ -394,13 +394,13 @@ namespace llvm {
 
     /// EmitValue - Emit debug information entry offset.
     ///
-    virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
+    virtual void EmitValue(AsmPrinter *AP, uint16_t Form) const;
 
     /// SizeOf - Determine size of debug information entry in bytes.
     ///
-    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const {
-      return Form == dwarf::DW_FORM_ref_addr ? getRefAddrSize(AP) :
-                                               sizeof(int32_t);
+    virtual unsigned SizeOf(AsmPrinter *AP, uint16_t Form) const {
+      return Form == dwarf::DW_FORM_ref_addr ? getRefAddrSize(AP)
+                                             : sizeof(int32_t);
     }
 
     /// Returns size of a ref_addr entry.
@@ -430,7 +430,7 @@ namespace llvm {
 
     /// BestForm - Choose the best form for data.
     ///
-    unsigned BestForm() const {
+    uint16_t BestForm() const {
       if ((unsigned char)Size == Size)  return dwarf::DW_FORM_block1;
       if ((unsigned short)Size == Size) return dwarf::DW_FORM_block2;
       if ((unsigned int)Size == Size)   return dwarf::DW_FORM_block4;
@@ -439,11 +439,11 @@ namespace llvm {
 
     /// EmitValue - Emit block data.
     ///
-    virtual void EmitValue(AsmPrinter *AP, unsigned Form) const;
+    virtual void EmitValue(AsmPrinter *AP, uint16_t Form) const;
 
     /// SizeOf - Determine size of block data in bytes.
     ///
-    virtual unsigned SizeOf(AsmPrinter *AP, unsigned Form) const;
+    virtual unsigned SizeOf(AsmPrinter *AP, uint16_t Form) const;
 
     // Implement isa/cast/dyncast.
     static bool classof(const DIEValue *E) { return E->getType() == isBlock; }
diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
index df8ca170ac1..2980b64d066 100644
--- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp
@@ -99,7 +99,7 @@ int64_t CompileUnit::getDefaultLowerBound() const {
 }
 
 /// addFlag - Add a flag that is true.
-void CompileUnit::addFlag(DIE *Die, unsigned Attribute) {
+void CompileUnit::addFlag(DIE *Die, uint16_t Attribute) {
   if (!DD->useDarwinGDBCompat())
     Die->addValue(Attribute, dwarf::DW_FORM_flag_present,
                   DIEIntegerOne);
@@ -109,8 +109,8 @@ void CompileUnit::addFlag(DIE *Die, unsigned Attribute) {
 
 /// addUInt - Add an unsigned integer attribute data and value.
 ///
-void CompileUnit::addUInt(DIE *Die, unsigned Attribute,
-                          unsigned Form, uint64_t Integer) {
+void CompileUnit::addUInt(DIE *Die, uint16_t Attribute,
+                          uint16_t Form, uint64_t Integer) {
   if (!Form) Form = DIEInteger::BestForm(false, Integer);
   DIEValue *Value = Integer == 1 ?
     DIEIntegerOne : new (DIEValueAllocator) DIEInteger(Integer);
@@ -119,8 +119,8 @@ void CompileUnit::addUInt(DIE *Die, unsigned Attribute,
 
 /// addSInt - Add an signed integer attribute data and value.
 ///
-void CompileUnit::addSInt(DIE *Die, unsigned Attribute,
-                          unsigned Form, int64_t Integer) {
+void CompileUnit::addSInt(DIE *Die, uint16_t Attribute,
+                          uint16_t Form, int64_t Integer) {
   if (!Form) Form = DIEInteger::BestForm(true, Integer);
   DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer);
   Die->addValue(Attribute, Form, Value);
@@ -131,9 +131,9 @@ void CompileUnit::addSInt(DIE *Die, unsigned Attribute,
 /// more predictable sizes. In the case of split dwarf we emit an index
 /// into another table which gets us the static offset into the string
 /// table.
-void CompileUnit::addString(DIE *Die, unsigned Attribute, StringRef String) {
+void CompileUnit::addString(DIE *Die, uint16_t Attribute, StringRef String) {
   DIEValue *Value;
-  unsigned Form;
+  uint16_t Form;
   if (!DD->useSplitDwarf()) {
     MCSymbol *Symb = DU->getStringPoolEntry(String);
     if (Asm->needsRelocationsForDwarfStringPool())
@@ -154,7 +154,7 @@ void CompileUnit::addString(DIE *Die, unsigned Attribute, StringRef String) {
 
 /// addLocalString - Add a string attribute data and value. This is guaranteed
 /// to be in the local string pool instead of indirected.
-void CompileUnit::addLocalString(DIE *Die, unsigned Attribute,
+void CompileUnit::addLocalString(DIE *Die, uint16_t Attribute,
                                  StringRef String) {
   MCSymbol *Symb = DU->getStringPoolEntry(String);
   DIEValue *Value;
@@ -169,7 +169,7 @@ void CompileUnit::addLocalString(DIE *Die, unsigned Attribute,
 
 /// addExpr - Add a Dwarf expression attribute data and value.
 ///
-void CompileUnit::addExpr(DIE *Die, unsigned Attribute, unsigned Form,
+void CompileUnit::addExpr(DIE *Die, uint16_t Attribute, uint16_t Form,
                           const MCExpr *Expr) {
   DIEValue *Value = new (DIEValueAllocator) DIEExpr(Expr);
   Die->addValue(Attribute, Form, Value);
@@ -177,7 +177,7 @@ void CompileUnit::addExpr(DIE *Die, unsigned Attribute, unsigned Form,
 
 /// addLabel - Add a Dwarf label attribute data and value.
 ///
-void CompileUnit::addLabel(DIE *Die, unsigned Attribute, unsigned Form,
+void CompileUnit::addLabel(DIE *Die, uint16_t Attribute, uint16_t Form,
                            const MCSymbol *Label) {
   DIEValue *Value = new (DIEValueAllocator) DIELabel(Label);
   Die->addValue(Attribute, Form, Value);
@@ -186,7 +186,7 @@ void CompileUnit::addLabel(DIE *Die, unsigned Attribute, unsigned Form,
 /// addLabelAddress - Add a dwarf label attribute data and value using
 /// DW_FORM_addr or DW_FORM_GNU_addr_index.
 ///
-void CompileUnit::addLabelAddress(DIE *Die, unsigned Attribute,
+void CompileUnit::addLabelAddress(DIE *Die, uint16_t Attribute,
                                   MCSymbol *Label) {
   if (!DD->useSplitDwarf()) {
     if (Label != NULL) {
@@ -218,7 +218,7 @@ void CompileUnit::addOpAddress(DIE *Die, const MCSymbol *Sym) {
 
 /// addDelta - Add a label delta attribute data and value.
 ///
-void CompileUnit::addDelta(DIE *Die, unsigned Attribute, unsigned Form,
+void CompileUnit::addDelta(DIE *Die, uint16_t Attribute, uint16_t Form,
                            const MCSymbol *Hi, const MCSymbol *Lo) {
   DIEValue *Value = new (DIEValueAllocator) DIEDelta(Hi, Lo);
   Die->addValue(Attribute, Form, Value);
@@ -226,14 +226,14 @@ void CompileUnit::addDelta(DIE *Die, unsigned Attribute, unsigned Form,
 
 /// addDIEEntry - Add a DIE attribute data and value.
 ///
-void CompileUnit::addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form,
+void CompileUnit::addDIEEntry(DIE *Die, uint16_t Attribute, uint16_t Form,
                               DIE *Entry) {
   Die->addValue(Attribute, Form, createDIEEntry(Entry));
 }
 
 /// addBlock - Add block data.
 ///
-void CompileUnit::addBlock(DIE *Die, unsigned Attribute, unsigned Form,
+void CompileUnit::addBlock(DIE *Die, uint16_t Attribute, uint16_t Form,
                            DIEBlock *Block) {
   Block->ComputeSize(Asm);
   DIEBlocks.push_back(Block); // Memoize so we can call the destructor later on.
@@ -393,7 +393,7 @@ void CompileUnit::addRegisterOffset(DIE *TheDie, unsigned Reg,
 
 /// addAddress - Add an address attribute to a die based on the location
 /// provided.
-void CompileUnit::addAddress(DIE *Die, unsigned Attribute,
+void CompileUnit::addAddress(DIE *Die, uint16_t Attribute,
                              const MachineLocation &Location, bool Indirect) {
   DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
 
@@ -416,7 +416,7 @@ void CompileUnit::addAddress(DIE *Die, unsigned Attribute,
 /// the starting location.  Add the DWARF information to the die.
 ///
 void CompileUnit::addComplexAddress(const DbgVariable &DV, DIE *Die,
-                                    unsigned Attribute,
+                                    uint16_t Attribute,
                                     const MachineLocation &Location) {
   DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
   unsigned N = DV.getNumAddrElements();
@@ -509,11 +509,11 @@ void CompileUnit::addComplexAddress(const DbgVariable &DV, DIE *Die,
 /// more information, read large comment just above here.
 ///
 void CompileUnit::addBlockByrefAddress(const DbgVariable &DV, DIE *Die,
-                                       unsigned Attribute,
+                                       uint16_t Attribute,
                                        const MachineLocation &Location) {
   DIType Ty = DV.getType();
   DIType TmpTy = Ty;
-  unsigned Tag = Ty.getTag();
+  uint16_t Tag = Ty.getTag();
   bool isPointer = false;
 
   StringRef varName = DV.getName();
@@ -609,7 +609,7 @@ void CompileUnit::addConstantValue(DIE *Die, const MachineOperand &MO,
   DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
   int SizeInBits = -1;
   bool SignedConstant = isTypeSigned(Ty, &SizeInBits);
-  unsigned Form = SignedConstant ? dwarf::DW_FORM_sdata : dwarf::DW_FORM_udata;
+  uint16_t Form = SignedConstant ? dwarf::DW_FORM_sdata : dwarf::DW_FORM_udata;
   switch (SizeInBits) {
     case 8:  Form = dwarf::DW_FORM_data1; break;
     case 16: Form = dwarf::DW_FORM_data2; break;
@@ -775,7 +775,7 @@ DIE *CompileUnit::getOrCreateTypeDIE(const MDNode *TyNode) {
 }
 
 /// addType - Add a new type attribute to the specified entity.
-void CompileUnit::addType(DIE *Entity, DIType Ty, unsigned Attribute) {
+void CompileUnit::addType(DIE *Entity, DIType Ty, uint16_t Attribute) {
   if (!Ty.isType())
     return;
 
@@ -814,7 +814,7 @@ void CompileUnit::addGlobalType(DIType Ty) {
 /// addPubTypes - Add type for pubtypes section.
 void CompileUnit::addPubTypes(DISubprogram SP) {
   DICompositeType SPTy = SP.getType();
-  unsigned SPTag = SPTy.getTag();
+  uint16_t SPTag = SPTy.getTag();
   if (SPTag != dwarf::DW_TAG_subroutine_type)
     return;
 
@@ -854,7 +854,7 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) {
   // Get core information.
   StringRef Name = DTy.getName();
   uint64_t Size = DTy.getSizeInBits() >> 3;
-  unsigned Tag = DTy.getTag();
+  uint16_t Tag = DTy.getTag();
 
   // FIXME - Workaround for templates.
   if (Tag == dwarf::DW_TAG_inheritance) Tag = dwarf::DW_TAG_reference_type;
@@ -896,7 +896,7 @@ static bool isTypeUnitScoped(DIType Ty) {
 
 /// Return true if the type should be split out into a type unit.
 static bool shouldCreateTypeUnit(DICompositeType CTy) {
-  unsigned Tag = CTy.getTag();
+  uint16_t Tag = CTy.getTag();
 
   switch (Tag) {
   case dwarf::DW_TAG_structure_type:
@@ -920,7 +920,7 @@ void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
   StringRef Name = CTy.getName();
 
   uint64_t Size = CTy.getSizeInBits() >> 3;
-  unsigned Tag = CTy.getTag();
+  uint16_t Tag = CTy.getTag();
   Buffer.setTag(Tag);
 
   switch (Tag) {
@@ -1559,7 +1559,7 @@ DIE *CompileUnit::constructVariableDIE(DbgVariable *DV,
   StringRef Name = DV->getName();
 
   // Translate tag to proper Dwarf tag.
-  unsigned Tag = DV->getTag();
+  uint16_t Tag = DV->getTag();
 
   // Define variable debug information entry.
   DIE *VariableDie = new DIE(Tag);
diff --git a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
index 3908b376449..92c56dbfd18 100644
--- a/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
+++ b/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h
@@ -196,38 +196,38 @@ public:
   }
 
   /// addFlag - Add a flag that is true to the DIE.
-  void addFlag(DIE *Die, unsigned Attribute);
+  void addFlag(DIE *Die, uint16_t Attribute);
 
   /// addUInt - Add an unsigned integer attribute data and value.
   ///
-  void addUInt(DIE *Die, unsigned Attribute, unsigned Form, uint64_t Integer);
+  void addUInt(DIE *Die, uint16_t Attribute, uint16_t Form, uint64_t Integer);
 
   /// addSInt - Add an signed integer attribute data and value.
   ///
-  void addSInt(DIE *Die, unsigned Attribute, unsigned Form, int64_t Integer);
+  void addSInt(DIE *Die, uint16_t Attribute, uint16_t Form, int64_t Integer);
 
   /// addString - Add a string attribute data and value.
   ///
-  void addString(DIE *Die, unsigned Attribute, const StringRef Str);
+  void addString(DIE *Die, uint16_t Attribute, const StringRef Str);
 
   /// addLocalString - Add a string attribute data and value.
   ///
-  void addLocalString(DIE *Die, unsigned Attribute, const StringRef Str);
+  void addLocalString(DIE *Die, uint16_t Attribute, const StringRef Str);
 
   /// addExpr - Add a Dwarf expression attribute data and value.
   ///
-  void addExpr(DIE *Die, unsigned Attribute, unsigned Form,
+  void addExpr(DIE *Die, uint16_t Attribute, uint16_t Form,
                const MCExpr *Expr);
 
   /// addLabel - Add a Dwarf label attribute data and value.
   ///
-  void addLabel(DIE *Die, unsigned Attribute, unsigned Form,
+  void addLabel(DIE *Die, uint16_t Attribute, uint16_t Form,
                 const MCSymbol *Label);
 
   /// addLabelAddress - Add a dwarf label attribute data and value using
   /// either DW_FORM_addr or DW_FORM_GNU_addr_index.
   ///
-  void addLabelAddress(DIE *Die, unsigned Attribute, MCSymbol *Label);
+  void addLabelAddress(DIE *Die, uint16_t Attribute, MCSymbol *Label);
 
   /// addOpAddress - Add a dwarf op address data and value using the
   /// form given and an op of either DW_FORM_addr or DW_FORM_GNU_addr_index.
@@ -237,16 +237,16 @@ public:
 
   /// addDelta - Add a label delta attribute data and value.
   ///
-  void addDelta(DIE *Die, unsigned Attribute, unsigned Form,
+  void addDelta(DIE *Die, uint16_t Attribute, uint16_t Form,
                 const MCSymbol *Hi, const MCSymbol *Lo);
 
   /// addDIEEntry - Add a DIE attribute data and value.
   ///
-  void addDIEEntry(DIE *Die, unsigned Attribute, unsigned Form, DIE *Entry);
+  void addDIEEntry(DIE *Die, uint16_t Attribute, uint16_t Form, DIE *Entry);
 
   /// addBlock - Add block data.
   ///
-  void addBlock(DIE *Die, unsigned Attribute, unsigned Form, DIEBlock *Block);
+  void addBlock(DIE *Die, uint16_t Attribute, uint16_t Form, DIEBlock *Block);
 
   /// addSourceLine - Add location information to specified debug information
   /// entry.
@@ -259,7 +259,7 @@ public:
 
   /// addAddress - Add an address attribute to a die based on the location
   /// provided.
-  void addAddress(DIE *Die, unsigned Attribute,
+  void addAddress(DIE *Die, uint16_t Attribute,
                   const MachineLocation &Location, bool Indirect = false);
 
   /// addConstantValue - Add constant value entry in variable DIE.
@@ -285,7 +285,7 @@ public:
   /// (navigating the extra location information encoded in the type) based on
   /// the starting location.  Add the DWARF information to the die.
   ///
-  void addComplexAddress(const DbgVariable &DV, DIE *Die, unsigned Attribute,
+  void addComplexAddress(const DbgVariable &DV, DIE *Die, uint16_t Attribute,
                          const MachineLocation &Location);
 
   // FIXME: Should be reformulated in terms of addComplexAddress.
@@ -295,7 +295,7 @@ public:
   /// starting location.  Add the DWARF information to the die.  Obsolete,
   /// please use addComplexAddress instead.
   ///
-  void addBlockByrefAddress(const DbgVariable &DV, DIE *Die, unsigned Attribute,
+  void addBlockByrefAddress(const DbgVariable &DV, DIE *Die, uint16_t Attribute,
                             const MachineLocation &Location);
 
   /// addVariableAddress - Add DW_AT_location attribute for a
@@ -309,7 +309,7 @@ public:
   /// addType - Add a new type attribute to the specified entity. This takes
   /// and attribute parameter because DW_AT_friend attributes are also
   /// type references.
-  void addType(DIE *Entity, DIType Ty, unsigned Attribute = dwarf::DW_AT_type);
+  void addType(DIE *Entity, DIType Ty, uint16_t Attribute = dwarf::DW_AT_type);
 
   /// getOrCreateNameSpace - Create a DIE for DINameSpace.
   DIE *getOrCreateNameSpace(DINameSpace NS);
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
index 979c0c3466c..99d65199dbe 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
@@ -147,7 +147,7 @@ DIType DbgVariable::getType() const {
        the pointers and __Block_byref_x_VarName struct to find the actual
        value of the variable.  The function addBlockByrefType does this.  */
     DIType subType = Ty;
-    unsigned tag = Ty.getTag();
+    uint16_t tag = Ty.getTag();
 
     if (tag == dwarf::DW_TAG_pointer_type) {
       DIDerivedType DTy = DIDerivedType(Ty);
@@ -392,7 +392,7 @@ DIE *DwarfDebug::updateSubprogramScopeDIE(CompileUnit *SPCU,
         // Add arguments.
         DICompositeType SPTy = SP.getType();
         DIArray Args = SPTy.getTypeArray();
-        unsigned SPTag = SPTy.getTag();
+        uint16_t SPTag = SPTy.getTag();
         if (SPTag == dwarf::DW_TAG_subroutine_type)
           for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
             DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.h b/lib/CodeGen/AsmPrinter/DwarfDebug.h
index e14f9b135b3..f5344b103ea 100644
--- a/lib/CodeGen/AsmPrinter/DwarfDebug.h
+++ b/lib/CodeGen/AsmPrinter/DwarfDebug.h
@@ -169,7 +169,7 @@ public:
   int getFrameIndex()                const { return FrameIndex; }
   void setFrameIndex(int FI)               { FrameIndex = FI; }
   // Translate tag to proper Dwarf tag.
-  unsigned getTag()                  const {
+  uint16_t getTag()                  const {
     if (Var.getTag() == dwarf::DW_TAG_arg_variable)
       return dwarf::DW_TAG_formal_parameter;
 
diff --git a/lib/IR/DebugInfo.cpp b/lib/IR/DebugInfo.cpp
index ff375420c9b..a6f1c3413e0 100644
--- a/lib/IR/DebugInfo.cpp
+++ b/lib/IR/DebugInfo.cpp
@@ -428,7 +428,7 @@ bool DIType::Verify() const {
     return false;
 
   // FIXME: Sink this into the various subclass verifies.
-  unsigned Tag = getTag();
+  uint16_t Tag = getTag();
   if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
       Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
       Tag != dwarf::DW_TAG_ptr_to_member_type &&
@@ -598,7 +598,7 @@ bool DIImportedEntity::Verify() const {
 /// getOriginalTypeSize - If this type is derived from a base type then
 /// return base type size.
 uint64_t DIDerivedType::getOriginalTypeSize() const {
-  unsigned Tag = getTag();
+  uint16_t Tag = getTag();
 
   if (Tag != dwarf::DW_TAG_member && Tag != dwarf::DW_TAG_typedef &&
       Tag != dwarf::DW_TAG_const_type && Tag != dwarf::DW_TAG_volatile_type &&