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

   1 /* PR middle-end/27945 */
   2 /* { dg-do run } */
   3 /* { dg-options "" } */
   4 /* { dg-require-effective-target alloca } */
   5
   6 extern int printf (const char *, ...);
   7 extern void abort ();
   8
   9 int func(int levels)
  10 {
  11   struct bar {
  12     unsigned char       a;
  13     int                 b[levels];
  14   } __attribute__ ((__packed__)) bar;
  15
  16   struct foo {
  17     unsigned char       a;
  18     int                 b[4];
  19   } __attribute__ ((__packed__)) foo;
  20
  21   printf("foo %d\n", sizeof(foo));
  22   printf("bar %d\n", sizeof(bar));
  23
  24   if (sizeof (foo) != sizeof (bar))
  25     abort ();
  26 }
  27
  28 int main()
  29 {
  30   func(4);
  31   return 0;
  32 }