Global values also don't undead-ify pointers in our dead alloca's set.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40936 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 0 deletions

diff --git a/lib/Transforms/Scalar/DeadStoreElimination.cpp b/lib/Transforms/Scalar/DeadStoreElimination.cpp
index d740b655e5..283fcbc97a 100644
--- a/lib/Transforms/Scalar/DeadStoreElimination.cpp
+++ b/lib/Transforms/Scalar/DeadStoreElimination.cpp
@@ -364,6 +364,9 @@ bool DSE::RemoveUndeadPointers(Value* killPointer,
     if (deadPointers.count(A))
       deadPointers.erase(A);
     return false;
+  } else if (isa<GlobalValue>(killPointer)) {
+    // A global can't be in the dead pointer set
+    return false;
   }
   
   bool MadeChange = false;