[ilist_node] Add a getReverseIterator() method and a unittest for it.

This is the reverse_iterator analogue of getIterator().

llvm-svn: 285780

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/include/llvm/ADT/ilist_node.h b/llvm/include/llvm/ADT/ilist_node.h
index 84208b0841b..7244d0f4058 100644
--- a/llvm/include/llvm/ADT/ilist_node.h
+++ b/llvm/include/llvm/ADT/ilist_node.h
@@ -80,6 +80,12 @@ private:
 public:
   self_iterator getIterator() { return self_iterator(*this); }
   const_self_iterator getIterator() const { return const_self_iterator(*this); }
+  reverse_self_iterator getReverseIterator() {
+    return reverse_self_iterator(*this);
+  }
+  const_reverse_self_iterator getReverseIterator() const {
+    return const_reverse_self_iterator(*this);
+  }
 
   // Under-approximation, but always available for assertions.
   using node_base_type::isKnownSentinel;