Fix const ilist_node::get{Prev,Next}Node() to actually compile. Picky, picky.

llvm-svn: 103723

2 files changed, 7 insertions, 2 deletions

diff --git a/llvm/include/llvm/ADT/ilist_node.h b/llvm/include/llvm/ADT/ilist_node.h
index 3de4f156d20..f0080035cb8 100644
--- a/llvm/include/llvm/ADT/ilist_node.h
+++ b/llvm/include/llvm/ADT/ilist_node.h
@@ -67,7 +67,7 @@ public:
 
   /// \brief Get the previous node, or 0 for the list head.
   const NodeTy *getPrevNode() const {
-    NodeTy *Prev = this->getPrev();
+    const NodeTy *Prev = this->getPrev();
 
     // Check for sentinel.
     if (!Prev->getNext())
@@ -89,7 +89,7 @@ public:
 
   /// \brief Get the next node, or 0 for the list tail.
   const NodeTy *getNextNode() const {
-    NodeTy *Next = getNext();
+    const NodeTy *Next = getNext();
 
     // Check for sentinel.
     if (!Next->getNext())
diff --git a/llvm/unittests/ADT/ilistTest.cpp b/llvm/unittests/ADT/ilistTest.cpp
index 3bf04dccc2c..09a699a9624 100644
--- a/llvm/unittests/ADT/ilistTest.cpp
+++ b/llvm/unittests/ADT/ilistTest.cpp
@@ -34,6 +34,11 @@ TEST(ilistTest, Basic) {
   EXPECT_EQ(2, List.back().Value);
   EXPECT_EQ(2, List.front().getNextNode()->Value);
   EXPECT_EQ(1, List.back().getPrevNode()->Value);
+
+  const ilist<Node> &ConstList = List;
+  EXPECT_EQ(2, ConstList.back().Value);
+  EXPECT_EQ(2, ConstList.front().getNextNode()->Value);
+  EXPECT_EQ(1, ConstList.back().getPrevNode()->Value);
 }
 
 }