Give sentinel traits the right to determine the policy where the sentinel is kept.

This should result in less indirect memory accesses, less dead writes and tighter code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@66061 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 0 deletions

diff --git a/include/llvm/Support/Recycler.h b/include/llvm/Support/Recycler.h
index 3f235b6e72..39c992bc53 100644
--- a/include/llvm/Support/Recycler.h
+++ b/include/llvm/Support/Recycler.h
@@ -46,6 +46,9 @@ struct ilist_traits<RecyclerStruct> : ilist_default_traits<RecyclerStruct> {
   }
   static void destroySentinel(RecyclerStruct *) {}
 
+  RecyclerStruct *provideInitialHead() const { return createSentinel(); }
+  RecyclerStruct *ensureHead(RecyclerStruct*) const { return createSentinel(); }
+
   static void deleteNode(RecyclerStruct *) {
     assert(0 && "Recycler's ilist_traits shouldn't see a deleteNode call!");
   }