diff --git a/clang/lib/Analysis/PrintfFormatString.cpp b/clang/lib/Analysis/PrintfFormatString.cpp
index 4e3e391fd065..affc83e7efb8 100644
--- a/clang/lib/Analysis/PrintfFormatString.cpp
+++ b/clang/lib/Analysis/PrintfFormatString.cpp
@@ -372,11 +372,9 @@ bool PrintfSpecifier::fixType(QualType QT, const LangOptions &LangOpt) {
   }
 
   // We can only work with builtin types.
-  if (!QT->isBuiltinType())
-    return false;
-
-  // Everything else should be a base type
   const BuiltinType *BT = QT->getAs<BuiltinType>();
+  if (!BT)
+    return false;
 
   // Set length modifier
   switch (BT->getKind()) {
@@ -388,19 +386,15 @@ bool PrintfSpecifier::fixType(QualType QT, const LangOptions &LangOpt) {
   case BuiltinType::UInt128:
   case BuiltinType::Int128:
   case BuiltinType::Half:
-    // Integral types which are non-trivial to correct.
+    // Various types which are non-trivial to correct.
     return false;
 
-  case BuiltinType::Void:
-  case BuiltinType::NullPtr:
-  case BuiltinType::ObjCId:
-  case BuiltinType::ObjCClass:
-  case BuiltinType::ObjCSel:
-  case BuiltinType::Dependent:
-  case BuiltinType::Overload:
-  case BuiltinType::BoundMember:
-  case BuiltinType::UnknownAny:
-  case BuiltinType::ARCUnbridgedCast:
+#define SIGNED_TYPE(Id, SingletonId)
+#define UNSIGNED_TYPE(Id, SingletonId)
+#define FLOATING_TYPE(Id, SingletonId)
+#define BUILTIN_TYPE(Id, SingletonId) \
+  case BuiltinType::Id:
+#include "clang/AST/BuiltinTypes.def"
     // Misc other stuff which doesn't make sense here.
     return false;
 
diff --git a/clang/lib/CodeGen/CGRTTI.cpp b/clang/lib/CodeGen/CGRTTI.cpp
index c4526fc4cf71..1b3cb08284f5 100644
--- a/clang/lib/CodeGen/CGRTTI.cpp
+++ b/clang/lib/CodeGen/CGRTTI.cpp
@@ -195,11 +195,11 @@ static bool TypeInfoIsInStandardLibrary(const BuiltinType *Ty) {
     case BuiltinType::UInt128:
       return true;
       
-    case BuiltinType::Overload:
     case BuiltinType::Dependent:
-    case BuiltinType::BoundMember:
-    case BuiltinType::UnknownAny:
-    case BuiltinType::ARCUnbridgedCast:
+#define BUILTIN_TYPE(Id, SingletonId)
+#define PLACEHOLDER_TYPE(Id, SingletonId) \
+    case BuiltinType::Id:
+#include "clang/AST/BuiltinTypes.def"
       llvm_unreachable("asking for RRTI for a placeholder type!");
       
     case BuiltinType::ObjCId:
diff --git a/clang/lib/CodeGen/CodeGenTypes.cpp b/clang/lib/CodeGen/CodeGenTypes.cpp
index 3bb5d8a90fda..578695009bba 100644
--- a/clang/lib/CodeGen/CodeGenTypes.cpp
+++ b/clang/lib/CodeGen/CodeGenTypes.cpp
@@ -368,11 +368,11 @@ llvm::Type *CodeGenTypes::ConvertType(QualType T) {
       ResultType = llvm::IntegerType::get(getLLVMContext(), 128);
       break;
     
-    case BuiltinType::Overload:
     case BuiltinType::Dependent:
-    case BuiltinType::BoundMember:
-    case BuiltinType::UnknownAny:
-    case BuiltinType::ARCUnbridgedCast:
+#define BUILTIN_TYPE(Id, SingletonId)
+#define PLACEHOLDER_TYPE(Id, SingletonId) \
+    case BuiltinType::Id:
+#include "clang/AST/BuiltinTypes.def"
       llvm_unreachable("Unexpected placeholder builtin type!");
       break;
     }
diff --git a/clang/tools/libclang/CIndex.cpp b/clang/tools/libclang/CIndex.cpp
index 3130a029e7ee..17b2316bede5 100644
--- a/clang/tools/libclang/CIndex.cpp
+++ b/clang/tools/libclang/CIndex.cpp
@@ -1344,36 +1344,16 @@ bool CursorVisitor::VisitBuiltinTypeLoc(BuiltinTypeLoc TL) {
   // "Class") have associated declarations. Create cursors for those.
   QualType VisitType;
   switch (TL.getTypePtr()->getKind()) {
+
   case BuiltinType::Void:
-  case BuiltinType::Bool:
-  case BuiltinType::Char_U:
-  case BuiltinType::UChar:
-  case BuiltinType::Char16:
-  case BuiltinType::Char32:
-  case BuiltinType::UShort:
-  case BuiltinType::UInt:
-  case BuiltinType::ULong:
-  case BuiltinType::ULongLong:
-  case BuiltinType::UInt128:
-  case BuiltinType::Char_S:
-  case BuiltinType::SChar:
-  case BuiltinType::WChar_U:
-  case BuiltinType::WChar_S:
-  case BuiltinType::Short:
-  case BuiltinType::Int:
-  case BuiltinType::Long:
-  case BuiltinType::LongLong:
-  case BuiltinType::Int128:
-  case BuiltinType::Half:
-  case BuiltinType::Float:
-  case BuiltinType::Double:
-  case BuiltinType::LongDouble:
   case BuiltinType::NullPtr:
-  case BuiltinType::Overload:
-  case BuiltinType::BoundMember:
   case BuiltinType::Dependent:
-  case BuiltinType::UnknownAny:
-  case BuiltinType::ARCUnbridgedCast:
+#define BUILTIN_TYPE(Id, SingletonId)
+#define SIGNED_TYPE(Id, SingletonId) case BuiltinType::Id:
+#define UNSIGNED_TYPE(Id, SingletonId) case BuiltinType::Id:
+#define FLOATING_TYPE(Id, SingletonId) case BuiltinType::Id:
+#define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id:
+#include "clang/AST/BuiltinTypes.def"
     break;
 
   case BuiltinType::ObjCId:
diff --git a/clang/tools/libclang/CIndexUSRs.cpp b/clang/tools/libclang/CIndexUSRs.cpp
index f6e9aa358e22..1219c2eea197 100644
--- a/clang/tools/libclang/CIndexUSRs.cpp
+++ b/clang/tools/libclang/CIndexUSRs.cpp
@@ -578,11 +578,10 @@ void USRGenerator::VisitType(QualType T) {
           c = 'D'; break;
         case BuiltinType::NullPtr:
           c = 'n'; break;
-        case BuiltinType::Overload:
-        case BuiltinType::BoundMember:
+#define BUILTIN_TYPE(Id, SingletonId)
+#define PLACEHOLDER_TYPE(Id, SingletonId) case BuiltinType::Id:
+#include "clang/AST/BuiltinTypes.def"
         case BuiltinType::Dependent:
-        case BuiltinType::UnknownAny:
-        case BuiltinType::ARCUnbridgedCast:
           IgnoreResults = true;
           return;
         case BuiltinType::ObjCId: