From: Chris Lattner <sabre@nondot.org>
Date: Mon, 16 Jun 2008 04:02:40 +0000 (+0000)
Subject: fix pr2460
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=6520aa0f5ee12873ee85a34e17e628803f776b1a;p=oota-llvm.git

fix pr2460


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52294 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/VMCore/Instructions.cpp b/lib/VMCore/Instructions.cpp
index a49f6a564c2..80a24f9ff9f 100644
--- a/lib/VMCore/Instructions.cpp
+++ b/lib/VMCore/Instructions.cpp
@@ -130,7 +130,8 @@ PHINode::PHINode(const PHINode &PN)
 }
 
 PHINode::~PHINode() {
-  dropHungoffUses(OperandList);
+  if (OperandList)
+    dropHungoffUses(OperandList);
 }
 
 // removeIncomingValue - Remove an incoming value.  This is useful if a