const TargetInstrInfo *TII;
static char ID;
- Filler(TargetMachine &tm)
- : MachineFunctionPass(&ID), TM(tm), TII(tm.getInstrInfo()) { }
+ Filler(TargetMachine &tm)
+ : MachineFunctionPass(ID), TM(tm), TII(tm.getInstrInfo()) { }
virtual const char *getPassName() const {
return "Mips Delay Slot Filler";
/// Currently, we fill delay slots with NOPs. We assume there is only one
/// delay slot per delayed instruction.
bool Filler::
-runOnMachineBasicBlock(MachineBasicBlock &MBB)
+runOnMachineBasicBlock(MachineBasicBlock &MBB)
{
bool Changed = false;
- for (MachineBasicBlock::iterator I = MBB.begin(); I != MBB.end(); ++I)
- if (I->getDesc().hasDelaySlot()) {
+ for (MachineBasicBlock::iterator I = MBB.begin(); I != MBB.end(); ++I) {
+ const TargetInstrDesc& Tid = I->getDesc();
+ if (Tid.hasDelaySlot() &&
+ (TM.getSubtarget<MipsSubtarget>().isMips1() ||
+ Tid.isCall() || Tid.isBranch() || Tid.isReturn())) {
MachineBasicBlock::iterator J = I;
++J;
BuildMI(MBB, J, I->getDebugLoc(), TII->get(Mips::NOP));
++FilledSlots;
Changed = true;
}
+ }
+
return Changed;
}