From bcb85087a7f281dcc85b04f82be3a79ff9387fc5 Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Sun, 29 May 2011 19:33:36 +0000
Subject: [PATCH] Don't crash owhen ComputeLoadResult can't compute the result
 of the load.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132290 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/IPO/GlobalOpt.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 371500bc786..cdf7b76dd08 100644
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -2444,7 +2444,7 @@ static bool EvaluateFunction(Function *F, Constant *&RetVal,
         Constant *Val = getVal(Values, MSI->getValue());
         Constant *DestVal = ComputeLoadResult(getVal(Values, Ptr),
                                               MutatedMemory);
-        if (Val->isNullValue() && DestVal->isNullValue()) {
+        if (Val->isNullValue() && DestVal && DestVal->isNullValue()) {
           // This memset is a no-op.
           ++CurInst;
           continue;
-- 
2.34.1