gcc/testsuite/gcc.c-torture/execute/strct-varg-1.c

#ifdef NO_VARARGS
#include <stdarg.h>
#define va_alist int x_attr, ...
#define va_dcl
#else
#include <varargs.h>
#endif

struct s { int x, y; };

f (va_alist)
     va_dcl
{
  struct s va_values;
  va_list va;
  int attr;
  int i;

#ifdef NO_VARARGS
  va_start (va, x_attr);
  attr = x_attr;
#else
  va_start (va);
  attr = va_arg (va, int);
#endif

  if (attr != 2)
    abort ();

  va_values = va_arg (va, struct s);
  if (va_values.x != 0xaaaa || va_values.y != 0x5555)
    abort ();

  attr = va_arg (va, int);
  if (attr != 3)
    abort ();

  va_values = va_arg (va, struct s);
  if (va_values.x != 0xffff || va_values.y != 0x1111)
    abort ();

  va_end (va);
}

main ()
{
  struct s a, b;

  a.x = 0xaaaa;
  a.y = 0x5555;
  b.x = 0xffff;
  b.y = 0x1111;

  f (2, a, 3, b);
  exit (0);
}