disable SmallVectorImpl's copy constructor. This prevents a class

of base class slicing bugs reported on irc

llvm-svn: 106028

llvm/include/llvm/ADT/SmallVector.h

@@ -269,6 +269,8 @@ public:
 template <typename T>
 class SmallVectorImpl : public SmallVectorTemplateBase<T, isPodLike<T>::value> {
   typedef SmallVectorTemplateBase<T, isPodLike<T>::value > SuperClass;
+  
+  SmallVectorImpl(const SmallVectorImpl&); // DISABLED.
 public:
   typedef typename SuperClass::iterator iterator;
   typedef typename SuperClass::size_type size_type;