old-autovect-branch/gcc/testsuite/gcc.c-torture/execute/pr20527-1.c

   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 }