MachineFunction::iterator MFI = MBB;
MachineInstr *NewMI = TII->convertToThreeAddress(MFI, mi, LV);
assert(MBB == MFI && "convertToThreeAddress changed iterator reference");
- if (NewMI) {
- DEBUG(dbgs() << "2addr: CONVERTING 2-ADDR: " << *mi);
- DEBUG(dbgs() << "2addr: TO 3-ADDR: " << *NewMI);
- bool Sunk = false;
+ if (!NewMI)
+ return false;
- if (Indexes)
- Indexes->replaceMachineInstrInMaps(mi, NewMI);
+ DEBUG(dbgs() << "2addr: CONVERTING 2-ADDR: " << *mi);
+ DEBUG(dbgs() << "2addr: TO 3-ADDR: " << *NewMI);
+ bool Sunk = false;
- if (NewMI->findRegisterUseOperand(RegB, false, TRI))
- // FIXME: Temporary workaround. If the new instruction doesn't
- // uses RegB, convertToThreeAddress must have created more
- // then one instruction.
- Sunk = sink3AddrInstruction(NewMI, RegB, mi);
+ if (Indexes)
+ Indexes->replaceMachineInstrInMaps(mi, NewMI);
- MBB->erase(mi); // Nuke the old inst.
+ if (NewMI->findRegisterUseOperand(RegB, false, TRI))
+ // FIXME: Temporary workaround. If the new instruction doesn't
+ // uses RegB, convertToThreeAddress must have created more
+ // then one instruction.
+ Sunk = sink3AddrInstruction(NewMI, RegB, mi);
- if (!Sunk) {
- DistanceMap.insert(std::make_pair(NewMI, Dist));
- mi = NewMI;
- nmi = llvm::next(mi);
- }
+ MBB->erase(mi); // Nuke the old inst.
- // Update source and destination register maps.
- SrcRegMap.erase(RegA);
- DstRegMap.erase(RegB);
- return true;
+ if (!Sunk) {
+ DistanceMap.insert(std::make_pair(NewMI, Dist));
+ mi = NewMI;
+ nmi = llvm::next(mi);
}
- return false;
+ // Update source and destination register maps.
+ SrcRegMap.erase(RegA);
+ DstRegMap.erase(RegB);
+ return true;
}
/// scanUses - Scan forward recursively for only uses, update maps if the use