gcc/testsuite/gcc.dg/vla-14.c

   1 /* Test for VLA size evaluation in va_arg.  */
   2 /* Origin: Joseph Myers <joseph@codesourcery.com> */
   3 /* { dg-do run } */
   4 /* { dg-options "-std=gnu99" } */
   5
   6 #include <stdarg.h>
   7
   8 extern void exit (int);
   9 extern void abort (void);
  10
  11 int a[10];
  12 int i = 9;
  13
  14 void
  15 f (int n, ...)
  16 {
  17   va_list ap;
  18   void *p;
  19   va_start (ap, n);
  20   p = va_arg (ap, typeof (int (*)[++i]));
  21   if (p != a)
  22     abort ();
  23   if (i != n)
  24     abort ();
  25   va_end (ap);
  26 }
  27
  28 int
  29 main (void)
  30 {
  31   f (10, &a);
  32   exit (0);
  33 }