Added reset of LexicalScope in LiveDebugVariables reset function.

llvm-svn: 220545

llvm/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.