1  /* { dg-do compile } */
       2  /* { dg-options "-O2" } */
       3  
       4  typedef unsigned long ulg;
       5  long block_start;
       6  typedef unsigned char uch;
       7  extern uch window[];
       8   unsigned strstart;
       9  ulg flush_block (char *buf, ulg stored_len, int eof);
      10  ulg deflate()
      11  {
      12      return flush_block(block_start >= 0L ? (char*)&window[(unsigned)block_start] : (char*)((void *)0), (long)strstart - block_start, (1));
      13  }