Debug Info: Use identifier to reference DIType in containing type field of
a DICompositeType.
    
Verifier is updated accordingly.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190190 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/IR/DIBuilder.cpp b/lib/IR/DIBuilder.cpp
index d58a9dc..72205f6 100644
--- a/lib/IR/DIBuilder.cpp
+++ b/lib/IR/DIBuilder.cpp
@@ -626,7 +626,7 @@
     DerivedFrom,
     Elements,
     ConstantInt::get(Type::getInt32Ty(VMContext), 0),
-    VTableHolder,
+    DIType(VTableHolder).generateRef(),
     TemplateParams,
     UniqueIdentifier.empty() ? NULL : MDString::get(VMContext, UniqueIdentifier)
   };
@@ -663,7 +663,7 @@
     DerivedFrom,
     Elements,
     ConstantInt::get(Type::getInt32Ty(VMContext), RunTimeLang),
-    VTableHolder,
+    DIType(VTableHolder).generateRef(),
     NULL,
     UniqueIdentifier.empty() ? NULL : MDString::get(VMContext, UniqueIdentifier)
   };