gcc/testsuite/gcc.c-torture/execute/20080604-1.c

   1 struct barstruct { char const* some_string; } x;
   2 extern void abort (void);
   3 void __attribute__((noinline))
   4 foo(void)
   5 {
   6   if (!x.some_string)
   7     abort ();
   8 }
   9 void baz(int b)
  10 {
  11   struct barstruct bar;
  12   struct barstruct* barptr;
  13   if (b)
  14     barptr = &bar;
  15   else
  16     {
  17       barptr = &x + 1;
  18       barptr = barptr - 1;
  19     }
  20   barptr->some_string = "Everything OK";
  21   foo();
  22   barptr->some_string = "Everything OK";
  23 }
  24 int main()
  25 {
  26   x.some_string = (void *)0;
  27   baz(0);
  28   if (!x.some_string)
  29     abort ();
  30   return 0;
  31 }
  32