From: "Randy Brukardt" <randy@rrsoftware.com>
Subject: Re: What is the warning about builtin-function on gcc-4.6.0 ?
Date: Wed, 30 Mar 2011 14:28:12 -0500
Date: 2011-03-30T14:28:12-05:00 [thread overview]
Message-ID: <in008f$n8u$1@munin.nbi.dk> (raw)
In-Reply-To: wcc62r022b4.fsf@shell01.TheWorld.com
"Robert A Duff" <bobduff@shell01.TheWorld.com> wrote in message
news:wcc62r022b4.fsf@shell01.TheWorld.com...
...
> I was imagining a compiler that returns the right answer for
> abs(Integer'First). It's not entirely unreasonable. Perhaps
> Integer is 32 bits, and the arithmetic is done in a 64-bit
> register, which can obviously represent 2**31 just fine.
You don't need to imagine it. Janus/Ada does that (presuming you replace 32
by 16 and 64 by 32 in the above writeup). But I believe that we always
ensure parameters are valid, so that implies a check when the parameter is
passed to EQUAL, in the absence of any earlier check.
Randy.
next prev parent reply other threads:[~2011-03-30 19:28 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-26 6:32 What is the warning about builtin-function on gcc-4.6.0 ? ytomino
2011-03-26 8:45 ` Florian Weimer
2011-03-26 9:13 ` ytomino
2011-03-26 9:43 ` Florian Weimer
2011-03-26 10:07 ` ytomino
2011-03-26 10:24 ` Florian Weimer
2011-03-26 15:14 ` Dmitry A. Kazakov
2011-03-26 21:36 ` ytomino
2011-03-27 9:50 ` Dmitry A. Kazakov
2011-03-26 14:50 ` Simon Wright
2011-03-26 15:50 ` Florian Weimer
2011-03-26 16:32 ` Simon Wright
2011-03-26 17:02 ` Florian Weimer
2011-03-26 17:48 ` Simon Wright
2011-03-26 18:48 ` Florian Weimer
2011-03-27 2:08 ` Randy Brukardt
2011-03-27 8:37 ` Florian Weimer
2011-03-27 16:41 ` Robert A Duff
2011-03-27 17:21 ` Florian Weimer
2011-03-27 17:56 ` Robert A Duff
2011-03-27 16:51 ` Robert A Duff
2011-03-27 17:05 ` Florian Weimer
2011-03-27 17:14 ` Robert A Duff
2011-03-29 2:20 ` Randy Brukardt
2011-03-29 18:35 ` Robert A Duff
2011-03-29 23:35 ` Randy Brukardt
2011-03-30 1:02 ` Adam Beneschan
2011-03-30 12:57 ` Robert A Duff
2011-03-30 14:41 ` Adam Beneschan
2011-03-30 18:39 ` Robert A Duff
2011-03-30 19:28 ` Randy Brukardt [this message]
2011-03-26 21:58 ` ytomino
2011-03-26 22:00 ` Florian Weimer
2011-03-26 22:22 ` anon
2011-03-26 22:36 ` ytomino
2011-03-27 12:00 ` anon
2011-03-27 18:50 ` ytomino
2011-03-27 23:35 ` anon
2011-03-27 23:42 ` anon
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