modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/20070824-1.c (about)

     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  }