C++ (Cpp) MachineOperand::isRegMask Examples

Example #1

File: AArch64A57FPLoadBalancing.cpp Project: AntiMoron/llvm

void AArch64A57FPLoadBalancing::
maybeKillChain(MachineOperand &MO, unsigned Idx,
               std::map<unsigned, Chain*> &ActiveChains) {
  // Given an operand and the set of active chains (keyed by register),
  // determine if a chain should be ended and remove from ActiveChains.
  MachineInstr *MI = MO.getParent();

  if (MO.isReg()) {

    // If this is a KILL of a current chain, record it.
    if (MO.isKill() && ActiveChains.find(MO.getReg()) != ActiveChains.end()) {
      DEBUG(dbgs() << "Kill seen for chain " << TRI->getName(MO.getReg())
            << "\n");
      ActiveChains[MO.getReg()]->setKill(MI, Idx, /*Immutable=*/MO.isTied());
    }
    ActiveChains.erase(MO.getReg());

  } else if (MO.isRegMask()) {

    for (auto I = ActiveChains.begin(), E = ActiveChains.end();
         I != E;) {
      if (MO.clobbersPhysReg(I->first)) {
        DEBUG(dbgs() << "Kill (regmask) seen for chain "
              << TRI->getName(I->first) << "\n");
        I->second->setKill(MI, Idx, /*Immutable=*/true);
        ActiveChains.erase(I++);
      } else
        ++I;
    }

  }
}