-// commuteInstruction - The default implementation of this method just exchanges
-// operand 1 and 2.
-MachineInstr *TargetInstrInfo::commuteInstruction(MachineInstr *MI) const {
- assert(MI->getOperand(1).isRegister() && MI->getOperand(2).isRegister() &&
- "This only knows how to commute register operands so far");
- unsigned Reg1 = MI->getOperand(1).getReg();
- unsigned Reg2 = MI->getOperand(2).getReg();
- bool Reg1IsKill = MI->getOperand(1).isKill();
- bool Reg2IsKill = MI->getOperand(2).isKill();
- MI->getOperand(2).setReg(Reg1);
- MI->getOperand(1).setReg(Reg2);
- MI->getOperand(2).setIsKill(Reg1IsKill);
- MI->getOperand(1).setIsKill(Reg2IsKill);
- return MI;
-}
-
-bool TargetInstrInfo::PredicateInstruction(MachineInstr *MI,
- const std::vector<MachineOperand> &Pred) const {
- bool MadeChange = false;
- const TargetInstrDescriptor *TID = MI->getInstrDescriptor();
- if (TID->Flags & M_PREDICABLE) {
- for (unsigned j = 0, i = 0, e = MI->getNumOperands(); i != e; ++i) {
- if ((TID->OpInfo[i].Flags & M_PREDICATE_OPERAND)) {
- MachineOperand &MO = MI->getOperand(i);
- if (MO.isReg()) {
- MO.setReg(Pred[j].getReg());
- MadeChange = true;
- } else if (MO.isImm()) {
- MO.setImm(Pred[j].getImm());
- MadeChange = true;
- } else if (MO.isMBB()) {
- MO.setMBB(Pred[j].getMBB());
- MadeChange = true;
- }
- ++j;
- }
- }
- }
- return MadeChange;
+bool TargetInstrInfo::isUnpredicatedTerminator(const MachineInstr *MI) const {
+ const TargetInstrDesc &TID = MI->getDesc();
+ if (!TID.isTerminator()) return false;
+
+ // Conditional branch is a special case.
+ if (TID.isBranch() && !TID.isBarrier())
+ return true;
+ if (!TID.isPredicable())
+ return true;
+ return !isPredicated(MI);