1  /* PR rtl-optimization/20527
       2     Mishandled postincrement.  This test-case is derived from the
       3     function BZ2_hbCreateDecodeTables in the file huffman.c from
       4     bzip2-1.0.2, hence requiring the following disclaimer copied here:  */
       5  
       6  /*--
       7    This file is a part of bzip2 and/or libbzip2, a program and
       8    library for lossless, block-sorting data compression.
       9  
      10    Copyright (C) 1996-2002 Julian R Seward.  All rights reserved.
      11  
      12    Redistribution and use in source and binary forms, with or without
      13    modification, are permitted provided that the following conditions
      14    are met:
      15  
      16    1. Redistributions of source code must retain the above copyright
      17       notice, this list of conditions and the following disclaimer.
      18  
      19    2. The origin of this software must not be misrepresented; you must 
      20       not claim that you wrote the original software.  If you use this 
      21       software in a product, an acknowledgment in the product 
      22       documentation would be appreciated but is not required.
      23  
      24    3. Altered source versions must be plainly marked as such, and must
      25       not be misrepresented as being the original software.
      26  
      27    4. The name of the author may not be used to endorse or promote 
      28       products derived from this software without specific prior written 
      29       permission.
      30  
      31    THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
      32    OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
      33    WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
      34    ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
      35    DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
      36    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
      37    GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
      38    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
      39    WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
      40    NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
      41    SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      42  
      43    Julian Seward, Cambridge, UK.
      44    jseward@acm.org
      45    bzip2/libbzip2 version 1.0 of 21 March 2000
      46  
      47    This program is based on (at least) the work of:
      48       Mike Burrows
      49       David Wheeler
      50       Peter Fenwick
      51       Alistair Moffat
      52       Radford Neal
      53       Ian H. Witten
      54       Robert Sedgewick
      55       Jon L. Bentley
      56  
      57    For more information on these sources, see the manual.
      58  --*/
      59  
      60  void f (long *limit, long *base, long minLen, long maxLen) __attribute__ ((__noinline__));
      61  void f (long *limit, long *base, long minLen, long maxLen)
      62  {
      63    long i;
      64    long vec;
      65    vec = 0;
      66    for (i = minLen; i <= maxLen; i++) {
      67      vec += (base[i+1] - base[i]);
      68      limit[i] = vec-1;
      69    }
      70  }
      71  extern void abort (void);
      72  extern void exit (int);
      73  long b[] = {1, 5, 11, 23};
      74  int main (void)
      75  {
      76    long l[3];
      77    f (l, b, 0, 2);
      78    if (l[0] != 3 || l[1] != 9 || l[2] != 21)
      79      abort ();
      80    exit (0);
      81  }