From: "(see below)" <yaldnif.w@blueyonder.co.uk>
Subject: Re: Problem with optimizations
Date: Tue, 28 Apr 2009 19:40:07 +0100
Date: 2009-04-28T19:40:07+01:00 [thread overview]
Message-ID: <C61D0C17.115054%yaldnif.w@blueyonder.co.uk> (raw)
In-Reply-To: 49f73730$0$2850$ba620e4c@news.skynet.be
On 28/04/2009 18:04, in article 49f73730$0$2850$ba620e4c@news.skynet.be,
"Olivier Scalbert" <olivier.scalbert@algosyn.com> wrote:
...
> When, inside the Recursive_Find_Solution, I replace Is_Solved by
> Is_Solved1, then it works in all cases.
>
> I have try to understand what is happen with gdb and by having a look
> into the generated code, but without success.
>
> I have the same behaviour with:
> - Ubuntu 8.10 32 bits (GNATMAKE 4.3.2)
> - Debian testing AMD 64bits (GNATMAKE 4.3.3)
>
> The code can be found there:
> http://scalbert.dyndns.org/adarubik/
>
> This small project is a really a toy but I would like to understand the
> problem.
There is no else part for the following if:
if Is_Solved(Cube) then
New_Line;
Put("Solved !"); New_Line;
for i in 1..depth-1 loop
Ada.Integer_Text_IO.Put(Integer(Moves(i)));
end loop;
Result := True;
end if;
So the procedure can exit with Result undefined. Since the program is
incorrect, varying optimisation, or implementation details, is likely to
give varying results. Some may co-incidentally be the results you expect.
P.S. I did not use gdb.
--
Bill Findlay, <surname><forename> chez blueyonder.co.uk
"My own view on religion is that of Lucretius. I regard it as a disease born
of fear and as a source of untold misery to the human race." B. Russell
next prev parent reply other threads:[~2009-04-28 18:40 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-04-28 17:04 Problem with optimizations Olivier Scalbert
2009-04-28 17:34 ` Albrecht Käfer
2009-04-28 17:54 ` Olivier Scalbert
2009-04-28 18:32 ` Albrecht Käfer
2009-04-28 19:15 ` John B. Matthews
2009-04-28 18:40 ` (see below) [this message]
2009-04-28 19:05 ` Albrecht Käfer
2009-04-28 19:15 ` Olivier Scalbert
2009-04-28 19:17 ` Olivier Scalbert
2009-04-28 19:26 ` Gautier
2009-04-28 21:33 ` sjw
2009-04-29 10:36 ` johnscpg
2009-04-29 10:45 ` johnscpg
2009-04-29 13:51 ` johnscpg
2009-04-28 19:06 ` Olivier Scalbert
2009-04-28 19:12 ` (see below)
2009-04-29 2:35 ` Gene
2009-04-29 3:28 ` (see below)
2009-04-29 7:05 ` Georg Bauhaus
2009-04-28 19:46 ` Gautier
2009-04-28 20:05 ` Olivier Scalbert
2009-04-28 20:21 ` Olivier Scalbert
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