From: Richard Henderson <rth@redhat.com>
To: Andreas Schwab <schwab@suse.de>
Cc: Corey Minyard <minyard@acm.org>, gcc@gcc.gnu.org
Subject: Re: Loop optimization bug with Ada front end on PPC (and probably Alpha)
Date: Thu, 15 Nov 2001 16:20:00 -0000 [thread overview]
Message-ID: <20011125122218.A31367@redhat.com> (raw)
In-Reply-To: <jelmgu4wm4.fsf@sykes.suse.de>; from schwab@suse.de on Sun, Nov 25, 2001 at 05:57:07PM +0100
On Sun, Nov 25, 2001 at 05:57:07PM +0100, Andreas Schwab wrote:
> Here is a testcase for ia64-linux. It crashes in
>
> while (in < p)
> *out++ = *in++;
>
> because ar.lc == -1 (ie. "infinite").
At first blush, this is a gcse problem. Copy propagation doesn't
replace all ocurrences of r341, and doloop winds up computing ar.lc
from the wrong register.
r~
WARNING: multiple messages have this Message-ID
From: Richard Henderson <rth@redhat.com>
To: Andreas Schwab <schwab@suse.de>
Cc: Corey Minyard <minyard@acm.org>, gcc@gcc.gnu.org
Subject: Re: Loop optimization bug with Ada front end on PPC (and probably Alpha)
Date: Sun, 25 Nov 2001 12:23:00 -0000 [thread overview]
Message-ID: <20011125122218.A31367@redhat.com> (raw)
Message-ID: <20011125122300.2nJxwvu4GvPH-6xJzSu2aSbvhd9Em4q0YzRnl0kpS5g@z> (raw)
In-Reply-To: <jelmgu4wm4.fsf@sykes.suse.de>
On Sun, Nov 25, 2001 at 05:57:07PM +0100, Andreas Schwab wrote:
> Here is a testcase for ia64-linux. It crashes in
>
> while (in < p)
> *out++ = *in++;
>
> because ar.lc == -1 (ie. "infinite").
At first blush, this is a gcse problem. Copy propagation doesn't
replace all ocurrences of r341, and doloop winds up computing ar.lc
from the wrong register.
r~
next prev parent reply other threads:[~2001-11-25 20:23 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-13 5:20 Corey Minyard
2001-11-13 6:05 ` David Edelsohn
2001-11-14 8:05 ` Corey Minyard
2001-11-13 8:02 ` guerby
2001-11-13 9:48 ` Corey Minyard
2001-11-16 22:19 ` David Edelsohn
2001-11-26 7:39 ` David Edelsohn
2001-11-15 0:48 ` Richard Henderson
2001-11-15 14:19 ` Andreas Schwab
2001-11-15 16:20 ` Richard Henderson [this message]
2001-11-25 12:23 ` Richard Henderson
2001-11-18 9:18 ` Richard Henderson
2001-11-27 0:02 ` Richard Henderson
2001-11-25 8:57 ` Andreas Schwab
2001-11-15 18:02 ` Corey Minyard
2001-11-15 19:37 ` Richard Henderson
2001-11-25 15:52 ` Richard Henderson
2001-11-16 3:13 ` Richard Henderson
2001-11-16 3:42 ` Corey Minyard
2001-11-16 8:54 ` Bryce McKinlay
2001-11-26 0:47 ` Bryce McKinlay
2001-11-25 20:27 ` Corey Minyard
2001-11-17 1:33 ` Corey Minyard
2001-11-17 6:09 ` Corey Minyard
2001-11-26 10:22 ` Corey Minyard
2001-11-17 11:51 ` Richard Henderson
2001-11-17 15:20 ` Corey Minyard
2001-11-26 14:45 ` Corey Minyard
2001-11-18 5:15 ` Corey Minyard
2001-11-18 8:59 ` Richard Henderson
2001-11-19 2:58 ` Corey Minyard
2001-11-19 3:11 ` Richard Henderson
2001-11-19 5:36 ` Corey Minyard
2001-11-19 7:48 ` Richard Henderson
2001-11-19 7:58 ` Corey Minyard
2001-11-19 9:43 ` Richard Henderson
2001-11-19 12:44 ` Corey Minyard
2001-11-19 13:53 ` Richard Henderson
2001-11-20 11:20 ` Corey Minyard
2001-11-27 19:57 ` Corey Minyard
2001-11-27 15:31 ` Richard Henderson
2001-11-27 15:04 ` Corey Minyard
2001-11-27 14:27 ` Richard Henderson
2001-11-27 13:25 ` Corey Minyard
2001-11-27 12:58 ` Richard Henderson
2001-11-27 11:51 ` Corey Minyard
2001-11-27 10:29 ` Richard Henderson
2001-11-27 10:08 ` Corey Minyard
2001-11-26 23:18 ` Richard Henderson
2001-11-26 17:15 ` Corey Minyard
2001-11-26 13:49 ` Richard Henderson
2001-11-26 8:58 ` Corey Minyard
2001-11-25 17:58 ` Richard Henderson
2001-11-25 15:06 ` Corey Minyard
2001-11-15 18:47 Richard Kenner
2001-11-25 15:13 ` Richard Kenner
2001-11-15 19:05 dewar
2001-11-25 15:20 ` dewar
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