diff --git a/lib/CodeGen/LiveDebugVariables.cpp b/lib/CodeGen/LiveDebugVariables.cpp
index 72d0e138a3f..16248510880 100644
--- a/lib/CodeGen/LiveDebugVariables.cpp
+++ b/lib/CodeGen/LiveDebugVariables.cpp
@@ -347,6 +347,7 @@ public:
            "Dbg values are not emitted in LDV");
     EmitDone = false;
     ModifiedMF = false;
+    LS.reset();
   }
 
   /// mapVirtReg - Map virtual register to an equivalence class.