typo

llvm-svn: 23574
diff --git a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
index 8bf2bc0..648db02 100644
--- a/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/ScheduleDAG.cpp
@@ -713,7 +713,7 @@
       SDOperand Op = Node->getOperand(N);
       // No more flags to walk
       if (Op.getValueType() != MVT::Flag) break;
-      // Add do node group
+      // Add to node group
       NodeGroup::Add(getNI(Op.Val), NI);
     }
   }