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

llvm-svn: 40936

1 files changed, 3 insertions, 0 deletions

diff --git a/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp b/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp
index d740b655e57..283fcbc97a1 100644
--- a/llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp
+++ b/llvm/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;