const TargetInstrInfo &TII = Fn.getTarget().getInstrInfo();
for (MachineFunction::iterator FI = Fn.begin(), E = Fn.end(); FI != E; ++FI) {
// If last instruction is a return instruction, add an epilogue
- if (TII.isReturn(FI->back()->getOpcode())) {
+ if (!FI->empty() && TII.isReturn(FI->back()->getOpcode())) {
MBB = FI; I = MBB->end()-1;
for (unsigned i = 0, e = RegsToSave.size(); i != e; ++i) {