private static int getSmallIntConstantInstruction(int i) {
    switch (i) {
      case 0: return ICONST_0;
      case 1: return ICONST_1;
      case 2: return ICONST_2;
      case 3: return ICONST_3;
      case 4: return ICONST_4;
      case 5: return ICONST_5;
      default: throw new AssertionError(i);
    }
  }
private static int getSmallIntConstantInstruction(int i)