From d9289a54cdce925fb189c5558f694a241b6e6d04 Mon Sep 17 00:00:00 2001
From: Owen Anderson <resistor@mac.com>
Date: Fri, 6 Feb 2009 00:13:43 +0000
Subject: [PATCH] Fix a crasher: we need to check that the function is non-null
 before using it!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63902 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Analysis/AliasAnalysis.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Analysis/AliasAnalysis.cpp b/lib/Analysis/AliasAnalysis.cpp
index 3d1b20bba7a..369f2f4f90e 100644
--- a/lib/Analysis/AliasAnalysis.cpp
+++ b/lib/Analysis/AliasAnalysis.cpp
@@ -120,7 +120,7 @@ AliasAnalysis::getModRefBehavior(CallSite CS,
 AliasAnalysis::ModRefBehavior
 AliasAnalysis::getModRefBehavior(Function *F,
                                  std::vector<PointerAccessInfo> *Info) {
-  if (F->doesNotAccessMemory())
+  if (F && F->doesNotAccessMemory())
     // Can't do better than this.
     return DoesNotAccessMemory;
   return UnknownModRefBehavior;