+const TargetRegisterClass *MachineInstr::getRegClassConstraintEffect(
+ unsigned OpIdx, const TargetRegisterClass *CurRC,
+ const TargetInstrInfo *TII, const TargetRegisterInfo *TRI) const {
+ const TargetRegisterClass *OpRC = getRegClassConstraint(OpIdx, TII, TRI);
+ const MachineOperand &MO = getOperand(OpIdx);
+ assert(MO.isReg() &&
+ "Cannot get register constraints for non-register operand");
+ assert(CurRC && "Invalid initial register class");
+ if (unsigned SubIdx = MO.getSubReg()) {
+ if (OpRC)
+ CurRC = TRI->getMatchingSuperRegClass(CurRC, OpRC, SubIdx);
+ else
+ CurRC = TRI->getSubClassWithSubReg(CurRC, SubIdx);
+ } else if (OpRC)
+ CurRC = TRI->getCommonSubClass(CurRC, OpRC);
+ return CurRC;
+}
+
+/// Return the number of instructions inside the MI bundle, not counting the
+/// header instruction.
+unsigned MachineInstr::getBundleSize() const {
+ MachineBasicBlock::const_instr_iterator I = this;
+ unsigned Size = 0;
+ while (I->isBundledWithSucc())
+ ++Size, ++I;