From: "H. Peter Anvin" <hpa@zytor.com>
To: Mikael Pettersson <mikpe@csd.uu.se>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH][2.6.6-rc3] gcc-3.4.0 fixes
Date: Tue, 01 Jun 2004 10:14:48 -0700 [thread overview]
Message-ID: <40BCB988.80408@zytor.com> (raw)
In-Reply-To: <16572.38987.239160.819836@alkaid.it.uu.se>
Mikael Pettersson wrote:
>
> You're assuming pointers have uniform representation.
> C makes no such guarantees, and machines _have_ had
> different types of representations in the past.
>
By the way, I am not in any shape, way or form making that assumption -
although that's presumably how it would be *implemented* in an architecture
with sane pointers like, to the best of my knowledge ALL gcc targets.
(foo *)bar++;
... should be implemented as ...
({
foo *tmp1 = (foo *)bar;
tmp2 = tmp1 + 1;
bar = __typeof__(bar)tmp2;
tmp1;
})
-hpa
next prev parent reply other threads:[~2004-06-01 17:15 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-04-29 21:46 [PATCH][2.6.6-rc3] gcc-3.4.0 fixes Mikael Pettersson
2004-05-17 0:58 ` H. Peter Anvin
2004-06-01 14:52 ` Mikael Pettersson
2004-06-01 15:09 ` William Lee Irwin III
2004-06-01 15:35 ` Mikael Pettersson
2004-06-01 15:38 ` Andreas Schwab
2004-06-01 17:09 ` H. Peter Anvin
2004-06-01 17:14 ` H. Peter Anvin [this message]
2004-06-01 21:47 ` Mikael Pettersson
2004-06-01 17:27 ` Linus Torvalds
2004-06-01 19:34 ` Chris Wedgwood
2004-07-16 4:28 ` H. Peter Anvin
[not found] <1PX8S-5z2-23@gated-at.bofh.it>
2004-04-29 9:30 ` Ihar 'Philips' Filipau
2004-04-29 20:46 ` Paul Wagland
2004-04-29 20:54 ` Denis Vlasenko
2004-04-29 21:35 ` Ihar 'Philips' Filipau
-- strict thread matches above, loose matches on Subject: below --
2004-04-28 13:07 Mikael Pettersson
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