Emit debug info for c++0x nullptr.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139752 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index 5061e2e..919c5f9 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -302,8 +302,8 @@
     assert(0 && "Unexpected builtin type UnknownAny");
     return llvm::DIType();
   case BuiltinType::NullPtr:
-    assert(0 && "Unexpected builtin type NullPtr");
-    return llvm::DIType();
+    return DBuilder.
+      createNullPtrType(BT->getName(CGM.getContext().getLangOptions()));
   case BuiltinType::Void:
     return llvm::DIType();
   case BuiltinType::ObjCClass: