/// *only* if a transformation took place.
virtual bool OptimizeCompareInstr(MachineInstr *CmpInstr,
unsigned SrcReg, int Mask, int Value,
+ const MachineRegisterInfo *MRI,
MachineBasicBlock::iterator &) const {
return false;
}
return false;
// Attempt to optimize the comparison instruction.
- if (TII->OptimizeCompareInstr(MI, SrcReg, CmpMask, CmpValue, NextIter)) {
+ if (TII->OptimizeCompareInstr(MI, SrcReg, CmpMask, CmpValue, MRI, NextIter)) {
++NumEliminated;
return true;
}
/// iterator *only* if a transformation took place.
bool ARMBaseInstrInfo::
OptimizeCompareInstr(MachineInstr *CmpInstr, unsigned SrcReg, int CmpMask,
- int CmpValue, MachineBasicBlock::iterator &MII) const {
+ int CmpValue, const MachineRegisterInfo *MRI,
+ MachineBasicBlock::iterator &MII) const {
if (CmpValue != 0)
return false;
- MachineRegisterInfo &MRI = CmpInstr->getParent()->getParent()->getRegInfo();
- MachineRegisterInfo::def_iterator DI = MRI.def_begin(SrcReg);
- if (llvm::next(DI) != MRI.def_end())
+ MachineRegisterInfo::def_iterator DI = MRI->def_begin(SrcReg);
+ if (llvm::next(DI) != MRI->def_end())
// Only support one definition.
return false;
if (CmpMask != ~0) {
if (!isSuitableForMask(MI, SrcReg, CmpMask, false)) {
MI = 0;
- for (MachineRegisterInfo::use_iterator UI = MRI.use_begin(SrcReg),
- UE = MRI.use_end(); UI != UE; ++UI) {
+ for (MachineRegisterInfo::use_iterator UI = MRI->use_begin(SrcReg),
+ UE = MRI->use_end(); UI != UE; ++UI) {
if (UI->getParent() != CmpInstr->getParent()) continue;
MachineInstr *PotentialAND = &*UI;
if (!isSuitableForMask(PotentialAND, SrcReg, CmpMask, true))
/// that we can remove a "comparison with zero".
virtual bool OptimizeCompareInstr(MachineInstr *CmpInstr, unsigned SrcReg,
int CmpMask, int CmpValue,
+ const MachineRegisterInfo *MRI,
MachineBasicBlock::iterator &MII) const;
virtual unsigned getNumMicroOps(const MachineInstr *MI,