From c23b8719ef9d6b1220e854b37d40e9e1c48a82bc Mon Sep 17 00:00:00 2001
From: Gabor Greif <ggreif@gmail.com>
Date: Wed, 4 Mar 2009 20:36:44 +0000
Subject: 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
---
 include/llvm/Function.h | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'include/llvm/Function.h')

diff --git a/include/llvm/Function.h b/include/llvm/Function.h
index 37e8f19f62..cb3cc939d0 100644
--- a/include/llvm/Function.h
+++ b/include/llvm/Function.h
@@ -38,6 +38,10 @@ template<> struct ilist_traits<BasicBlock>
     return static_cast<BasicBlock*>(&Sentinel);
   }
   static void destroySentinel(BasicBlock*) {}
+
+  BasicBlock *provideInitialHead() const { return createSentinel(); }
+  BasicBlock *ensureHead(BasicBlock*) const { return createSentinel(); }
+
   static iplist<BasicBlock> &getList(Function *F);
   static ValueSymbolTable *getSymTab(Function *ItemParent);
   static int getListOffset();
@@ -52,6 +56,10 @@ template<> struct ilist_traits<Argument>
     return static_cast<Argument*>(&Sentinel);
   }
   static void destroySentinel(Argument*) {}
+
+  Argument *provideInitialHead() const { return createSentinel(); }
+  Argument *ensureHead(Argument*) const { return createSentinel(); }
+
   static iplist<Argument> &getList(Function *F);
   static ValueSymbolTable *getSymTab(Function *ItemParent);
   static int getListOffset();
-- 
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