diff --git a/llvm/lib/CodeGen/LiveVariables.cpp b/llvm/lib/CodeGen/LiveVariables.cpp
index 6f8e956b8663..504b607b8576 100644
--- a/llvm/lib/CodeGen/LiveVariables.cpp
+++ b/llvm/lib/CodeGen/LiveVariables.cpp
@@ -356,7 +356,6 @@ void LiveVariables::HandlePhysRegDef(unsigned Reg, MachineInstr *MI) {
           if (PhysRegPartUse[SubReg])
             addRegisterKilled(SubReg, PhysRegPartUse[SubReg], true);
         }
-        //addRegisterKilled(SubReg, LastRef);
       } else if (PhysRegPartUse[SubReg])
         // Add implicit use / kill to last use of a sub-register.
         addRegisterKilled(SubReg, PhysRegPartUse[SubReg], true);