1  #include <stdarg.h>
       2  
       3  extern void abort (void);
       4  long x, y;
       5  
       6  inline void __attribute__((always_inline))
       7  f1i (va_list ap)
       8  {
       9    x = va_arg (ap, double);
      10    x += va_arg (ap, long);
      11    x += va_arg (ap, double);
      12  }
      13  
      14  void
      15  f1 (int i, ...)
      16  {
      17    va_list ap;
      18    va_start (ap, i);
      19    f1i (ap);
      20    va_end (ap);
      21  }
      22  
      23  inline void __attribute__((always_inline))
      24  f2i (va_list ap)
      25  {
      26    y = va_arg (ap, int);
      27    y += va_arg (ap, long);
      28    y += va_arg (ap, double);
      29    f1i (ap);
      30  }
      31  
      32  void
      33  f2 (int i, ...)
      34  {
      35    va_list ap;
      36    va_start (ap, i);
      37    f2i (ap);
      38    va_end (ap);
      39  }
      40  
      41  long
      42  f3h (int i, long arg0, long arg1, long arg2, long arg3)
      43  {
      44    return i + arg0 + arg1 + arg2 + arg3;
      45  }
      46  
      47  long
      48  f3 (int i, ...)
      49  {
      50    long t, arg0, arg1, arg2, arg3;
      51    va_list ap;
      52  
      53    va_start (ap, i);
      54    switch (i)
      55      {
      56      case 0:
      57        t = f3h (i, 0, 0, 0, 0);
      58        break;
      59      case 1:
      60        arg0 = va_arg (ap, long);
      61        t = f3h (i, arg0, 0, 0, 0);
      62        break;
      63      case 2:
      64        arg0 = va_arg (ap, long);
      65        arg1 = va_arg (ap, long);
      66        t = f3h (i, arg0, arg1, 0, 0);
      67        break;
      68      case 3:
      69        arg0 = va_arg (ap, long);
      70        arg1 = va_arg (ap, long);
      71        arg2 = va_arg (ap, long);
      72        t = f3h (i, arg0, arg1, arg2, 0);
      73        break;
      74      case 4:
      75        arg0 = va_arg (ap, long);
      76        arg1 = va_arg (ap, long);
      77        arg2 = va_arg (ap, long);
      78        arg3 = va_arg (ap, long);
      79        t = f3h (i, arg0, arg1, arg2, arg3);
      80        break;
      81      default:
      82        abort ();
      83      }
      84    va_end (ap);
      85  
      86    return t;
      87  }
      88  
      89  void
      90  f4 (int i, ...)
      91  {
      92    va_list ap;
      93  
      94    va_start (ap, i);
      95    switch (i)
      96      {
      97      case 4:
      98        y = va_arg (ap, double);
      99        break;
     100      case 5:
     101        y = va_arg (ap, double);
     102        y += va_arg (ap, double);
     103        break;
     104      default:
     105        abort ();
     106      }
     107    f1i (ap);
     108    va_end (ap);
     109  }
     110  
     111  int
     112  main (void)
     113  {
     114    f1 (3, 16.0, 128L, 32.0);
     115    if (x != 176L)
     116      abort ();
     117    f2 (6, 5, 7L, 18.0, 19.0, 17L, 64.0);
     118    if (x != 100L || y != 30L)
     119      abort ();
     120    if (f3 (0) != 0)
     121      abort ();
     122    if (f3 (1, 18L) != 19L)
     123      abort ();
     124    if (f3 (2, 18L, 100L) != 120L)
     125      abort ();
     126    if (f3 (3, 18L, 100L, 300L) != 421L)
     127      abort ();
     128    if (f3 (4, 18L, 71L, 64L, 86L) != 243L)
     129      abort ();
     130    f4 (4, 6.0, 9.0, 16L, 18.0);
     131    if (x != 43L || y != 6L)
     132      abort ();
     133    f4 (5, 7.0, 21.0, 1.0, 17L, 126.0);
     134    if (x != 144L || y != 28L)
     135      abort ();
     136    return 0;
     137  }