Beispiel #1
0
bool FuncletLayout::runOnMachineFunction(MachineFunction &F) {
  DenseMap<const MachineBasicBlock *, int> FuncletMembership =
      getFuncletMembership(F);
  if (FuncletMembership.empty())
    return false;

  F.sort([&](MachineBasicBlock &X, MachineBasicBlock &Y) {
    auto FuncletX = FuncletMembership.find(&X);
    auto FuncletY = FuncletMembership.find(&Y);
    assert(FuncletX != FuncletMembership.end());
    assert(FuncletY != FuncletMembership.end());
    return FuncletX->second < FuncletY->second;
  });

  // Conservatively assume we changed something.
  return true;
}