From: Dan Gohman <gohman@apple.com>
Date: Wed, 28 Jul 2010 00:21:18 +0000 (+0000)
Subject: Add a comment.
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=f374ba2bcd3a3b993d6b3fcd9f70a29973f93175;p=oota-llvm.git

Add a comment.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@109565 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/llvm/Analysis/ScalarEvolutionExpressions.h b/include/llvm/Analysis/ScalarEvolutionExpressions.h
index 74242031edd..dd311c5508c 100644
--- a/include/llvm/Analysis/ScalarEvolutionExpressions.h
+++ b/include/llvm/Analysis/ScalarEvolutionExpressions.h
@@ -523,6 +523,8 @@ namespace llvm {
   class SCEVUnknown : public SCEV {
     friend class ScalarEvolution;
 
+    // This should be an AssertingVH, however SCEVUnknowns are allocated in a
+    // BumpPtrAllocator so their destructors are never called.
     Value *V;
     SCEVUnknown(const FoldingSetNodeIDRef ID, Value *v) :
       SCEV(ID, scUnknown), V(v) {}