commit bcb85087a7f281dcc85b04f82be3a79ff9387fc5
author Nick Lewycky <nicholas@mxc.ca> Sun May 29 19:33:36 2011 +0000
committer Nick Lewycky <nicholas@mxc.ca> Sun May 29 19:33:36 2011 +0000
tree 405c2274b8647f830fafa8101fa0fa95cf46bcc8
parent 1f237b00279ada1ccce35ab924a7f797d9dea25d

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

diff --git a/lib/Transforms/IPO/GlobalOpt.cpp b/lib/Transforms/IPO/GlobalOpt.cpp
index 371500b..cdf7b76 100644
--- a/lib/Transforms/IPO/GlobalOpt.cpp
+++ b/lib/Transforms/IPO/GlobalOpt.cpp
@@ -2444,7 +2444,7 @@
         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;