diff --git a/lib/Target/ARM/ARMBaseRegisterInfo.cpp b/lib/Target/ARM/ARMBaseRegisterInfo.cpp
index bf779ccf554..dd6204996dc 100644
--- a/lib/Target/ARM/ARMBaseRegisterInfo.cpp
+++ b/lib/Target/ARM/ARMBaseRegisterInfo.cpp
@@ -779,7 +779,9 @@ ARMBaseRegisterInfo::processFunctionBeforeCalleeSavedScan(MachineFunction &MF,
       while (NumExtras && !UnspilledCS1GPRs.empty()) {
         unsigned Reg = UnspilledCS1GPRs.back();
         UnspilledCS1GPRs.pop_back();
-        if (!isReservedReg(MF, Reg)) {
+        if (!isReservedReg(MF, Reg) &&
+            (!AFI->isThumb1OnlyFunction() || isARMLowRegister(Reg) ||
+             Reg == ARM::LR)) {
           Extras.push_back(Reg);
           NumExtras--;
         }