Provide more details for DINameSpace debug info in the IR comment annotations

Sorry for the version skew - I should've committed this before the
corresponding Clang test case.

llvm-svn: 177486
diff --git a/llvm/lib/IR/DebugInfo.cpp b/llvm/lib/IR/DebugInfo.cpp
index d1db3ab..dd7ba23 100644
--- a/llvm/lib/IR/DebugInfo.cpp
+++ b/llvm/lib/IR/DebugInfo.cpp
@@ -1033,6 +1033,8 @@
     DIVariable(DbgNode).printInternal(OS);
   } else if (this->isObjCProperty()) {
     DIObjCProperty(DbgNode).printInternal(OS);
+  } else if (this->isNameSpace()) {
+    DINameSpace(DbgNode).printInternal(OS);
   } else if (this->isScope()) {
     DIScope(DbgNode).printInternal(OS);
   }
@@ -1106,6 +1108,14 @@
   OS << " [" << A.getNumElements() << " elements]";
 }
 
+void DINameSpace::printInternal(raw_ostream &OS) const {
+  StringRef Name = getName();
+  if (!Name.empty())
+    OS << " [" << Name << ']';
+
+  OS << " [line " << getLineNumber() << ']';
+}
+
 void DISubprogram::printInternal(raw_ostream &OS) const {
   // TODO : Print context
   OS << " [line " << getLineNumber() << ']';