diff --git a/lib/CodeGen/IfConversion.cpp b/lib/CodeGen/IfConversion.cpp
index 75ae5b9c2c2..00ea3c599f6 100644
--- a/lib/CodeGen/IfConversion.cpp
+++ b/lib/CodeGen/IfConversion.cpp
@@ -993,7 +993,8 @@ static void UpdatePredRedefs(MachineInstr *MI, SmallSet<unsigned,4> &Redefs,
       if (AddImpUse)
         // Treat predicated update as read + write.
         MI->addOperand(MachineOperand::CreateReg(Reg, false/*IsDef*/,
-                                                true/*IsImp*/,false/*IsKill*/));
+                                              true/*IsImp*/,false/*IsKill*/,
+                                              false/*IsDead*/,true/*IsUndef*/));
     } else {
       Redefs.insert(Reg);
       for (const uint16_t *SR = TRI->getSubRegisters(Reg); *SR; ++SR)