Allow specific optimization passes to be requested from the command line. Now you can run "`ldc test.d -c -mem2reg -simplifycfg`" if you feel the urge. The -O<N> options are still supported, and are inserted in the passes list in the position where they appear on the command line. (so -simplifycfg -O1 -instcombine does the "right thing") One small change: -inline is renamed to -enable-inlining due to a naming conflict with the option to add the -inline pass. -inline now inserts the inlining pass in the position specified, not in the middle of -O<N>. (ldmd has been updated to translate -inline to -enable-inlining)

module qd1;
import qd;
void main() {
  screen(640, 480);
  sleep(1);

  cls(Red);
  sleep(1);

  cls(Green);
  sleep(1);

  cls(Blue);
  sleep(1);

//   pset(10, 10);
//   line(0, 0, 100, 100, Box, Back(Red~Black));
//   for (int i=0; i<=100; i+=10) {
//     line(i, 0, 100-i, 100);
//     line(0, i, 100, 100-i);
//   }
//   circle(100, 100, 50, 15, White~Black, Fill=White~Black);
//   paint(200, 200, Red, Back=White);
//   circle(100, 100, 50, 15, White);
//   paint(200, 200, Black);
//   pset(10, 11); pset(10, 11, Black);
//   pset(10, 10);
//   sleep(1);
}