From: Georg Bauhaus <bauhaus@futureapps.de>
To: Paul Schlie <schlie@comcast.net>
Cc: gcc@gcc.gnu.org
Subject: Re: Where does the C standard describe overflow of signed integers?
Date: Sat, 16 Jul 2005 12:12:00 -0000 [thread overview]
Message-ID: <42D8F9B2.10306@futureapps.de> (raw)
In-Reply-To: <BEFD487E.AD59%schlie@comcast.net>
Paul Schlie wrote:
>>From: Georg Bauhaus <bauhaus@futureapps.de>
>>
>>
>>>Paul Schlie wrote:
>>>
>>>
>>>>From: Robert Dewar <dewar@adacore.com>
>>>>
>>>>
>>>> this would mean you could not put local variables in
>>>>registers. the effect on code quality woul be awful!
>>>>
>>>>
>>>Why would anyone care about the performance of an access to an
>>>un-initialized variable?
>>>
>>>
>>You can have both, correctness and uninitialised local
>>variables. For an impression of the difference in performance,
>>
>>
>- which predominantly illustrates the effect of volatile semantics?
>
>
I was looking for a way to stop GCC from using registers,
as I wanted to see one of the above mentioned effects
on code quality. Hence volatile.
-- Georg
next prev parent reply other threads:[~2005-07-16 12:12 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-07-14 19:09 Paul Schlie
2005-07-14 19:13 ` Robert Dewar
2005-07-14 19:28 ` Paul Schlie
2005-07-14 19:33 ` Robert Dewar
2005-07-14 20:13 ` Paul Schlie
2005-07-15 13:20 ` Georg Bauhaus
2005-07-15 13:33 ` Georg Bauhaus
2005-07-15 14:31 ` Dave Korn
2005-07-16 12:04 ` Georg Bauhaus
2005-07-16 14:26 ` Paul Schlie
2005-07-15 15:03 ` Paul Schlie
2005-07-16 12:12 ` Georg Bauhaus [this message]
2005-07-14 20:35 ` Paul Koning
2005-07-14 21:58 ` Paul Schlie
2005-07-15 7:04 ` Avi Kivity
-- strict thread matches above, loose matches on Subject: below --
2005-07-14 1:10 Paul Schlie
2005-07-14 1:59 ` Robert Dewar
2005-07-14 5:28 ` Paul Schlie
2005-07-14 17:57 ` Matthew Woodcraft
2005-07-14 18:36 ` Paul Koning
2005-07-11 14:58 Nicholas Nethercote
2005-07-11 15:07 ` Dave Korn
2005-07-11 16:07 ` Nicholas Nethercote
2005-07-11 17:04 ` Dave Korn
2005-07-11 15:15 ` Nathan Sidwell
2005-07-11 15:23 ` Dave Korn
2005-07-12 23:13 ` Michael Meissner
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