BFI: Add constructor for Weight

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@212868 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Analysis/BlockFrequencyInfoImpl.h

@@ -322,6 +322,8 @@ public:
     BlockNode TargetNode;
     uint64_t Amount;
     Weight() : Type(Local), Amount(0) {}
+    Weight(DistType Type, BlockNode TargetNode, uint64_t Amount)
+        : Type(Type), TargetNode(TargetNode), Amount(Amount) {}
   };
 
   /// \brief Distribution of unscaled probability weight.