Index: llvm/include/llvm/IR/Function.h
===================================================================
--- llvm/include/llvm/IR/Function.h
+++ llvm/include/llvm/IR/Function.h
@@ -64,6 +64,8 @@
   // BasicBlock iterators...
   using iterator = BasicBlockListType::iterator;
   using const_iterator = BasicBlockListType::const_iterator;
+  using reverse_iterator = BasicBlockListType::reverse_iterator;
+  using const_reverse_iterator = BasicBlockListType::const_reverse_iterator;
 
   using arg_iterator = Argument *;
   using const_arg_iterator = const Argument *;
@@ -766,6 +768,10 @@
   const_iterator          begin() const { return BasicBlocks.begin(); }
   iterator                end  ()       { return BasicBlocks.end();   }
   const_iterator          end  () const { return BasicBlocks.end();   }
+  reverse_iterator       rbegin()       { return BasicBlocks.rbegin();}
+  const_reverse_iterator rbegin() const { return BasicBlocks.rbegin();}
+  reverse_iterator         rend()       { return BasicBlocks.rend();  }
+  const_reverse_iterator   rend() const { return BasicBlocks.rend();  }
 
   size_t                   size() const { return BasicBlocks.size();  }
   bool                    empty() const { return BasicBlocks.empty(); }