gcc/testsuite/gcc.dg/fixed-point/func-vararg-size0.c

   1 /* { dg-do run } */
   2 /* { dg-options "-std=gnu99" } */
   3
   4 /* C99 6.5.2.2 Function calls.
   5    Based on the test from ../dfp/.  */
   6
   7 #include <stdarg.h>
   8
   9 extern void abort (void);
  10
  11 struct S1
  12 {
  13   struct
  14   {
  15     _Fract e;
  16   } b[0];
  17 };
  18
  19 /* Test handling vararg parameters whose size is 0.  */
  20
  21 int check_var(int z,...)
  22 {
  23   double d;
  24   struct S1 s1;
  25   long long result;
  26   va_list ap;
  27   va_start (ap, z);
  28   d = va_arg (ap, double);
  29   s1 = va_arg (ap, struct S1);
  30   result = va_arg (ap, long long);
  31   va_end (ap);
  32   return (result == 2LL);
  33
  34 }
  35
  36 int
  37 main ()
  38 {
  39   struct S1 s1;
  40   struct S1 a1[5];
  41
  42   if (check_var(5, 1.0, s1, 2LL, a1[2], a1[2]) == 0)
  43     abort ();
  44
  45   return 0;
  46 }