gcc/testsuite/gcc.c-torture/execute/930718-1.c

   1 /* { dg-additional-options "-std=gnu89" } */
   2
   3 typedef struct rtx_def
   4 {
   5   int f1 :1;
   6   int f2 :1;
   7 } *rtx;
   8
   9 static rtx
  10 f (orig)
  11      register rtx orig;
  12 {
  13   if (orig->f1 || orig->f2)
  14     return orig;
  15   orig->f2 = 1;
  16   return orig;
  17 }
  18
  19 void
  20 f2 ()
  21 {
  22   abort ();
  23 }
  24
  25 main ()
  26 {
  27   struct rtx_def foo;
  28   rtx bar;
  29
  30   foo.f1 = 1;
  31   foo.f2 = 0;
  32   bar = f (&foo);
  33   if (bar != &foo || bar->f2 != 0)
  34     abort ();
  35   exit (0);
  36 }