gcc/testsuite/gcc.c-torture/execute/960301-1.c

   1 void abort (void);
   2 void exit (int);
   3
   4 struct foo {
   5   unsigned : 12;
   6   unsigned field : 4;
   7 } foo;
   8 unsigned oldfoo;
   9
  10 int
  11 bar (unsigned k)
  12 {
  13   oldfoo = foo.field;
  14   foo.field = k;
  15   if (k)
  16     return 1;
  17   return 2;
  18 }
  19
  20 int
  21 main (void)
  22 {
  23   if (bar (1U) != 1)
  24     abort ();
  25   exit (0);
  26 }