gcc/testsuite/gcc.c-torture/execute/20070824-1.c

   1 /* PR tree-optimization/33136 */
   2 /* { dg-require-effective-target alloca } */
   3
   4 extern void abort (void);
   5
   6 struct S
   7 {
   8   struct S *a;
   9   int b;
  10 };
  11
  12 int
  13 main (void)
  14 {
  15   struct S *s = (struct S *) 0, **p, *n;
  16   for (p = &s; *p; p = &(*p)->a);
  17   n = (struct S *) __builtin_alloca (sizeof (*n));
  18   n->a = *p;
  19   n->b = 1;
  20   *p = n;
  21
  22   if (!s)
  23     abort ();
  24   return 0;
  25 }