/// corresponding value is null. If the register is live but used in
/// multiple register classes, the corresponding value is -1 casted to a
/// pointer.
- const TargetRegisterClass *
- Classes[TargetRegisterInfo::FirstVirtualRegister];
+ std::vector<const TargetRegisterClass*> Classes;
- /// RegRegs - Map registers to all their references within a live range.
+ /// RegRefs - Map registers to all their references within a live range.
std::multimap<unsigned, MachineOperand *> RegRefs;
+ typedef std::multimap<unsigned, MachineOperand *>::const_iterator
+ RegRefIter;
/// KillIndices - The index of the most recent kill (proceding bottom-up),
/// or ~0u if the register is not live.
- unsigned KillIndices[TargetRegisterInfo::FirstVirtualRegister];
+ std::vector<unsigned> KillIndices;
/// DefIndices - The index of the most recent complete def (proceding bottom
/// up), or ~0u if the register is live.
- unsigned DefIndices[TargetRegisterInfo::FirstVirtualRegister];
+ std::vector<unsigned> DefIndices;
/// KeepRegs - A set of registers which are live and cannot be changed to
/// break anti-dependencies.
private:
void PrescanInstruction(MachineInstr *MI);
void ScanInstruction(MachineInstr *MI, unsigned Count);
- unsigned findSuitableFreeRegister(MachineInstr *MI,
+ bool isNewRegClobberedByRefs(RegRefIter RegRefBegin,
+ RegRefIter RegRefEnd,
+ unsigned NewReg);
+ unsigned findSuitableFreeRegister(RegRefIter RegRefBegin,
+ RegRefIter RegRefEnd,
unsigned AntiDepReg,
unsigned LastNewReg,
- const TargetRegisterClass *);
+ const TargetRegisterClass *RC);
};
}