From 22d00c4b5b0845531feead561116ede02a7354b9 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Wed, 2 Sep 2009 21:22:09 +0000
Subject: Use CallbackVH, instead of WeakVH, to hold MDNode elements. Use
 FoldingSetNode to unique MDNodes in a context. Use CallbackVH hooks to update
 context's MDNodeSet appropriately.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80839 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/VMCore/LLVMContextImpl.h | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

(limited to 'lib/VMCore/LLVMContextImpl.h')

diff --git a/lib/VMCore/LLVMContextImpl.h b/lib/VMCore/LLVMContextImpl.h
index eeafeaf..1ee4ad7 100644
--- a/lib/VMCore/LLVMContextImpl.h
+++ b/lib/VMCore/LLVMContextImpl.h
@@ -19,6 +19,7 @@
 #include "LeaksContext.h"
 #include "TypesContext.h"
 #include "llvm/LLVMContext.h"
+#include "llvm/Metadata.h"
 #include "llvm/Constants.h"
 #include "llvm/DerivedTypes.h"
 #include "llvm/System/Mutex.h"
@@ -106,10 +107,12 @@ public:
   
   StringMap<MDString*> MDStringCache;
   
+  FoldingSet<MDNode> MDNodeSet;
+  
   ValueMap<char, Type, ConstantAggregateZero> AggZeroConstants;
 
   SmallPtrSet<const MDNode *, 8> MDNodes;
-  
+
   typedef ValueMap<std::vector<Constant*>, ArrayType, 
     ConstantArray, true /*largekey*/> ArrayConstantsTy;
   ArrayConstantsTy ArrayConstants;
@@ -199,7 +202,6 @@ public:
     ArrayConstants.freeConstants();
     StructConstants.freeConstants();
     VectorConstants.freeConstants();
-
     AggZeroConstants.freeConstants();
     NullPtrConstants.freeConstants();
     UndefValueConstants.freeConstants();
-- 
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