/// CopyCoallesceInMBB - Coallsece copies in the specified MBB, putting
/// copies that cannot yet be coallesced into the "TryAgain" list.
void CopyCoallesceInMBB(MachineBasicBlock *MBB,
- std::vector<CopyRec> &TryAgain, bool PhysOnly = false);
+ std::vector<CopyRec> *TryAgain, bool PhysOnly = false);
/// JoinCopy - Attempt to join intervals corresponding to SrcReg/DstReg,
/// which are the src/dst of the copy instruction CopyMI. This returns true
void LiveIntervals::CopyCoallesceInMBB(MachineBasicBlock *MBB,
- std::vector<CopyRec> &TryAgain, bool PhysOnly) {
+ std::vector<CopyRec> *TryAgain, bool PhysOnly) {
DOUT << ((Value*)MBB->getBasicBlock())->getName() << ":\n";
for (MachineBasicBlock::iterator MII = MBB->begin(), E = MBB->end();
unsigned SrcReg, DstReg;
if (!tii_->isMoveInstr(*Inst, SrcReg, DstReg)) continue;
- if (!JoinCopy(Inst, SrcReg, DstReg, PhysOnly))
- TryAgain.push_back(getCopyRec(Inst, SrcReg, DstReg));
+ if (TryAgain && !JoinCopy(Inst, SrcReg, DstReg, PhysOnly))
+ TryAgain->push_back(getCopyRec(Inst, SrcReg, DstReg));
}
}
// If there are no loops in the function, join intervals in function order.
for (MachineFunction::iterator I = mf_->begin(), E = mf_->end();
I != E; ++I)
- CopyCoallesceInMBB(I, TryAgainList);
+ CopyCoallesceInMBB(I, &TryAgainList);
} else {
// Otherwise, join intervals in inner loops before other intervals.
// Unfortunately we can't just iterate over loop hierarchy here because
// Finally, join intervals in loop nest order.
for (unsigned i = 0, e = MBBs.size(); i != e; ++i)
- CopyCoallesceInMBB(MBBs[i].second, TryAgainList, true);
+ CopyCoallesceInMBB(MBBs[i].second, NULL, true);
for (unsigned i = 0, e = MBBs.size(); i != e; ++i)
- CopyCoallesceInMBB(MBBs[i].second, TryAgainList, false);
+ CopyCoallesceInMBB(MBBs[i].second, &TryAgainList, false);
}
// Joining intervals can allow other intervals to be joined. Iteratively join