Fix a bug in a previous checkin that broke 175.vpr

llvm-svn: 12128
diff --git a/llvm/lib/Analysis/DataStructure/CompleteBottomUp.cpp b/llvm/lib/Analysis/DataStructure/CompleteBottomUp.cpp
index b8189c5..95c9d3c 100644
--- a/llvm/lib/Analysis/DataStructure/CompleteBottomUp.cpp
+++ b/llvm/lib/Analysis/DataStructure/CompleteBottomUp.cpp
@@ -222,5 +222,5 @@
 
   // Delete dead nodes.  Treat globals that are unreachable but that can
   // reach live nodes as live.
-  G.removeDeadNodes(DSGraph::RemoveUnreachableGlobals);
+  G.removeDeadNodes(DSGraph::KeepUnreachableGlobals);
 }