Add a fix for LLVM for late versions of clang

src/LLVM/include/llvm/Analysis/LoopInfo.h

@@ -828,8 +828,10 @@ public:
         typedef GraphTraits<Inverse<BlockT*> > InvBlockTraits;
 
         // Add all of the predecessors of X to the end of the work stack...
-        TodoStack.insert(TodoStack.end(), InvBlockTraits::child_begin(X),
-                         InvBlockTraits::child_end(X));
+        for (typename InvBlockTraits::ChildIteratorType PI = InvBlockTraits::child_begin(X), PE = InvBlockTraits::child_end(X); PI != PE; ++PI) { 
+          typename InvBlockTraits::NodeType *N = *PI; 
+          TodoStack.push_back(N); 
+        } 
       }
     }