Make MDNode use CallbackVH. Also change MDNode to store Value* instead of
Constant* in preperation of a future change to support holding non-Constants
in an MDNode.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71407 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AsmParser/LLParser.h b/lib/AsmParser/LLParser.h
index 44f4c2a..7106689 100644
--- a/lib/AsmParser/LLParser.h
+++ b/lib/AsmParser/LLParser.h
@@ -158,7 +158,7 @@
     bool ParseGlobalValue(const Type *Ty, Constant *&V);
     bool ParseGlobalTypeAndValue(Constant *&V);
     bool ParseGlobalValueVector(SmallVectorImpl<Constant*> &Elts);
-    bool ParseMDNodeVector(SmallVectorImpl<Constant*> &);
+    bool ParseMDNodeVector(SmallVectorImpl<Value*> &);
 
 
     // Function Semantic Analysis.