From 43ce9e3e7590e65d341edba536a8a36d9faa7e50 Mon Sep 17 00:00:00 2001
From: Devang Patel <dpatel@apple.com>
Date: Wed, 30 Sep 2009 21:26:51 +0000
Subject: [PATCH] Check for null MDNode element while printing comment.

llvm-svn: 83172
---
 lib/VMCore/AsmWriter.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/VMCore/AsmWriter.cpp b/lib/VMCore/AsmWriter.cpp
index fbd62dd0728..34ce7bb9964 100644
--- a/lib/VMCore/AsmWriter.cpp
+++ b/lib/VMCore/AsmWriter.cpp
@@ -874,7 +874,7 @@ static void WriteMDNodeComment(const MDNode *Node,
 			       formatted_raw_ostream &Out) {
   if (Node->getNumElements() < 1)
     return;
-  ConstantInt *CI = dyn_cast<ConstantInt>(Node->getElement(0));
+  ConstantInt *CI = dyn_cast_or_null<ConstantInt>(Node->getElement(0));
   if (!CI) return;
   unsigned Val = CI->getZExtValue();
   unsigned Tag = Val & ~LLVMDebugVersionMask;