diff --git a/include/llvm/Type.h b/include/llvm/Type.h
index cc682669ce5..04780e9e3c2 100644
--- a/include/llvm/Type.h
+++ b/include/llvm/Type.h
@@ -141,6 +141,11 @@ public:
   //
   inline bool isRecursive() const { return Recursive; }
 
+  // isLosslesslyConvertableTo - Return true if this type can be converted to
+  // 'Ty' without any reinterpretation of bits.  For example, uint to int.
+  //
+  bool isLosslesslyConvertableTo(const Type *Ty) const;
+
   //===--------------------------------------------------------------------===//
   // Type Iteration support
   //