From ee22be064ecfd9d49ac43dd5be998e8ea931ca57 Mon Sep 17 00:00:00 2001
From: Tanya Lattner <tonic@nondot.org>
Date: Fri, 16 Nov 2007 22:44:50 +0000
Subject: [PATCH] Fix for PR1801

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44193 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/BasicAliasAnalysis.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Analysis/BasicAliasAnalysis.cpp b/lib/Analysis/BasicAliasAnalysis.cpp
index d13a333ca34..cbbc530fefb 100644
--- a/lib/Analysis/BasicAliasAnalysis.cpp
+++ b/lib/Analysis/BasicAliasAnalysis.cpp
@@ -929,6 +929,9 @@ BasicAliasAnalysis::getModRefBehavior(Function *F, CallSite CS,
   }
   
   ValueName *Name = F->getValueName();
+  if (!Name)
+    return UnknownModRefBehavior;
+  
   unsigned NameLen = Name->getKeyLength();
   const char *NamePtr = Name->getKeyData();