Sort out mangled names for globals

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30460 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/MachineDebugInfo.h

@@ -622,6 +622,9 @@ public:
   }
   void setIsStatic(bool IS)                        { IsStatic = IS; }
   void setIsDefinition(bool ID)                    { IsDefinition = ID; }
+  bool hasMangledName()                      const {
+    return !DisplayName.empty();
+  }
 
   /// ApplyToFields - Target the visitor to the fields of the GlobalDesc.
   ///