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From: johnscpg@googlemail.com
Newsgroups: comp.lang.ada
Subject: Re: Problem with optimizations
Date: Wed, 29 Apr 2009 03:36:50 -0700 (PDT)
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Date: 2009-04-29T03:36:50-07:00
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On Apr 28, 8:15=A0pm, Olivier Scalbert <olivier.scalb...@algosyn.com>
wrote:
> Albrecht K=E4fer wrote:
> > (see below) schrieb::
> >> There is no else part for the following if:
>
> >> =A0 =A0 =A0 =A0 =A0 =A0 if Is_Solved(Cube) then
> >> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 New_Line;
> >> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Put("Solved !"); New_Line;
>
> >> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 for i in 1..depth-1 loop
> >> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Ada.Integer_Text_IO.Put(Intege=
r(Moves(i)));
> >> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 end loop;
> >> =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 Result :=3D True;
> >> =A0 =A0 =A0 =A0 =A0 =A0 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 expe=
ct.
>
> > Shouldn't that, you know, create a warning or something?
>
> > Albrecht
>
> That is what I was thinking, but with:
>
> gnatmake -f -O3 -W -gnatp rubikmain
>
> it detects the bug (and also an other one in the same function)
>
> Shame on me !