+static void addSaveRestoreRegs(MachineInstrBuilder &MIB,
+ const std::vector<CalleeSavedInfo> &CSI,
+ unsigned Flags = 0) {
+ for (unsigned i = 0, e = CSI.size(); i != e; ++i) {
+ // Add the callee-saved register as live-in. Do not add if the register is
+ // RA and return address is taken, because it has already been added in
+ // method MipsTargetLowering::LowerRETURNADDR.
+ // It's killed at the spill, unless the register is RA and return address
+ // is taken.
+ unsigned Reg = CSI[e-i-1].getReg();
+ switch (Reg) {
+ case Mips::RA:
+ case Mips::S0:
+ case Mips::S1:
+ MIB.addReg(Reg, Flags);
+ break;
+ case Mips::S2:
+ break;
+ default:
+ llvm_unreachable("unexpected mips16 callee saved register");
+
+ }
+ }
+}