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From: "schlie at comcast dot net" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/18065] not using qi version of divmod
Date: Tue, 19 Oct 2004 22:31:00 -0000 [thread overview]
Message-ID: <20041019223126.19251.qmail@sourceware.org> (raw)
In-Reply-To: <20041019202143.18065.schlie@comcast.net>
------- Additional Comments From schlie at comcast dot net 2004-10-19 22:31 -------
Subject: Re: not using qi version of divmod
Hi Eric,
Out of curiosity, what exactly is the 10733 bug, is wrong result computed?
If so, that implies that divmodhi is broken; otherwise it's not a bug, as
the intermediate (t1 + 40) expression yields an int result, as within the
context of the expression, although t1 is an unsigned char, there's no
guarantee that (t1 + 40) will not overflow an unsigned char size, therefore
properly assumed to be an int; unlike t1 = t1 % 3 or whatever, where all
operands are clearly type compatible with unsigned char, and a valid
optimization.
-paul-
> From: ericw at evcohs dot com <gcc-bugzilla@gcc.gnu.org>
> Reply-To: <gcc-bugzilla@gcc.gnu.org>
> Date: 19 Oct 2004 22:08:15 -0000
> To: <schlie@comcast.net>
> Subject: [Bug target/18065] not using qi version of divmod
>
>
> ------- Additional Comments From ericw at evcohs dot com 2004-10-19 22:08
> -------
> Bug #10733 is related.
>
> --
> What |Removed |Added
> ----------------------------------------------------------------------------
> CC| |ericw at evcohs dot com
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18065
>
> ------- You are receiving this mail because: -------
> You reported the bug, or are watching the reporter.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18065
next prev parent reply other threads:[~2004-10-19 22:31 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-19 20:22 [Bug c/18065] New: wrong built-in functions selected schlie at comcast dot net
2004-10-19 20:27 ` [Bug c/18065] " schlie at comcast dot net
2004-10-19 20:39 ` [Bug target/18065] " pinskia at gcc dot gnu dot org
2004-10-19 21:18 ` schlie at comcast dot net
2004-10-19 21:31 ` schlie at comcast dot net
2004-10-19 21:39 ` [Bug target/18065] not using qi version of divmod pinskia at gcc dot gnu dot org
2004-10-19 21:53 ` schlie at comcast dot net
2004-10-19 22:08 ` ericw at evcohs dot com
2004-10-19 22:31 ` schlie at comcast dot net [this message]
2004-10-19 23:13 ` ericw at evcohs dot com
2004-10-20 18:34 ` schlie at comcast dot net
2004-10-20 18:50 ` [Bug c/18065] usual arithmetic conversion not applying correctly pinskia at gcc dot gnu dot org
2004-10-20 19:14 ` schlie at comcast dot net
2004-10-20 19:18 ` pinskia at gcc dot gnu dot org
2004-10-20 19:25 ` pinskia at gcc dot gnu dot org
2004-10-20 19:29 ` pinskia at gcc dot gnu dot org
2004-10-20 19:33 ` schlie at comcast dot net
2004-10-20 19:54 ` pinskia at gcc dot gnu dot org
2004-10-20 21:19 ` schlie at comcast dot net
2004-10-20 21:25 ` pinskia at gcc dot gnu dot org
2004-10-20 21:31 ` jsm at polyomino dot org dot uk
2004-10-20 21:46 ` schlie at comcast dot net
2004-10-20 22:27 ` schlie at comcast dot net
2004-10-20 22:31 ` [Bug tree-optimization/18065] " pinskia at gcc dot gnu dot org
2004-10-20 22:42 ` jsm at polyomino dot org dot uk
2004-10-20 23:03 ` jsm at polyomino dot org dot uk
2004-10-20 23:28 ` schlie at comcast dot net
2004-10-21 1:04 ` schlie at comcast dot net
2004-10-21 1:28 ` schlie at comcast dot net
2004-10-21 12:47 ` bangerth at dealii dot org
2004-12-21 20:50 ` schlie at comcast dot net
2005-01-16 1:39 ` pinskia at gcc dot gnu dot org
2005-01-16 7:17 ` schlie at comcast dot net
2005-01-16 17:39 ` schlie at comcast dot net
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