gcc/testsuite/gcc.c-torture/execute/930429-1.c

void abort (void);
void exit (int);

char *
f (char *p)
{
  short x = *p++ << 16;
  return p;
}

int
main (void)
{
  char *p = "";
  if (f (p) != p + 1)
    abort ();
  exit (0);
}