gcc/testsuite/gcc.c-torture/execute/pr40022.c

   1 extern void abort (void);
   2
   3 struct A
   4 {
   5   struct A *a;
   6 };
   7
   8 struct B
   9 {
  10   struct A *b;
  11 };
  12
  13 __attribute__((noinline))
  14 struct A *
  15 foo (struct A *x)
  16 {
  17   asm volatile ("" : : "g" (x) : "memory");
  18   return x;
  19 }
  20
  21 __attribute__((noinline))
  22 void
  23 bar (struct B *w, struct A *x, struct A *y, struct A *z)
  24 {
  25   struct A **c;
  26   c = &w->b;
  27   *c = foo (x);
  28   while (*c)
  29     c = &(*c)->a;
  30   *c = foo (y);
  31   while (*c)
  32     c = &(*c)->a;
  33   *c = foo (z);
  34 }
  35
  36 struct B d;
  37 struct A e, f, g;
  38
  39 int
  40 main (void)
  41 {
  42   f.a = &g;
  43   bar (&d, &e, &f, 0);
  44   if (d.b == 0
  45       || d.b->a == 0
  46       || d.b->a->a == 0
  47       || d.b->a->a->a != 0)
  48     abort ();
  49   return 0;
  50 }
  51