From: Bernd Schmidt <bernds@codesourcery.com>
To: Richard Guenther <rguenther@suse.de>
Cc: Jakub Jelinek <jakub@redhat.com>, gcc-patches@gcc.gnu.org
Subject: Re: RFC: Fix GCSE exp_equiv_p on MEMs with different MEM_ATTRS (PR rtl-optimization/49390)
Date: Tue, 14 Jun 2011 09:40:00 -0000 [thread overview]
Message-ID: <4DF72BC4.5050306@codesourcery.com> (raw)
In-Reply-To: <alpine.LNX.2.00.1106141034320.810@zhemvz.fhfr.qr>
On 06/14/2011 10:43 AM, Richard Guenther wrote:
> The patch that reverted the MEM_ATTR comparison didn't come
> with a single testcase (ugh, I realize I approved it though ;)).
> Bernd, do you have any testcases?
It was a missed-optimization problem, but I think it only showed up with
a modified ARM backend, and it was a set of changes I threw away in the
end since I found a better fix. So, from that angle no objections if
it's reverted.
Judging from the variable names the testcase was 253.perlbmk/op.c, but I
can't make the problem reappear at the moment - quite possibly because
I'm not fully remembering what I had changed in arm.c.
Bernd
next prev parent reply other threads:[~2011-06-14 9:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-13 18:57 Jakub Jelinek
2011-06-14 9:10 ` Richard Guenther
2011-06-14 9:40 ` Bernd Schmidt [this message]
2011-06-14 10:03 ` Richard Guenther
2011-06-14 15:32 ` Jakub Jelinek
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