[PATCH] Use the zero-argument DIBuilder::createNullPtrType in Clang.

[Peter Collingbourne]

Hi dblaikie,

http://llvm-reviews.chandlerc.com/D1051

Files:
  lib/CodeGen/CGDebugInfo.cpp
  test/CodeGenCXX/debug-info-nullptr.cpp

Index: lib/CodeGen/CGDebugInfo.cpp
===================================================================
--- lib/CodeGen/CGDebugInfo.cpp
+++ lib/CodeGen/CGDebugInfo.cpp
@@ -369,8 +369,7 @@
   case BuiltinType::Dependent:
     llvm_unreachable("Unexpected builtin type");
   case BuiltinType::NullPtr:
-    return DBuilder.
-      createNullPtrType(BT->getName(CGM.getLangOpts()));
+    return DBuilder.createNullPtrType();
   case BuiltinType::Void:
     return llvm::DIType();
   case BuiltinType::ObjCClass:
Index: test/CodeGenCXX/debug-info-nullptr.cpp
===================================================================
--- test/CodeGenCXX/debug-info-nullptr.cpp
+++ test/CodeGenCXX/debug-info-nullptr.cpp
@@ -4,4 +4,4 @@
   decltype(nullptr) t = 0;
 }
 
-// CHECK: [ DW_TAG_unspecified_type ] [nullptr_t]
+// CHECK: [ DW_TAG_unspecified_type ] [decltype(nullptr)]
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