From: Kugan <kugan.vivekanandarajah@linaro.org>
To: Jeff Law <law@redhat.com>,
"gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>
Subject: Re: [PR65768] Check rtx_cost when propagating constant
Date: Fri, 29 May 2015 07:46:00 -0000 [thread overview]
Message-ID: <5568081A.4090103@linaro.org> (raw)
In-Reply-To: <5567892C.2010907@redhat.com>
On 29/05/15 07:31, Jeff Law wrote:
> On 05/13/2015 11:46 PM, Kugan wrote:
>> ping?
>>
>> Thanks,
>> Kugan
>>
>> On 15/04/15 17:53, Kugan wrote:
>>> As mentioned in PR65768, ARM gcc generates suboptimal code for constant
>>> Uses in loop. Part of the reason is cprop is undoing what loop invariant
>>> code motion did.
>>>
>>> Zhenqiang posted a patch at to fix this based on rtx costs:
>>> https://gcc.gnu.org/ml/gcc-patches/2014-06/msg01321.html
>>>
>>> I cleaned it up and bootstrapped, regression tested on x86_64-linux-gnu;
>>> no new regressions. Is this OK for trunk?
>>>
>>> Thanks,
>>> Kugan
>>>
>>> gcc/ChangeLog:
>>>
>>> 2015-04-15 Kugan Vivekanandarajah <kuganv@linaro.org>
>>> Zhenqiang Chen <zhenqiang.chen@linaro.org>
>>>
>>> PR target/65768
>>> * cprop.c (try_replace_reg): Check cost of constants before
>>> propagating.
> I should have also noted, fresh bootstrap & regression test is needed too.
Thanks Jeff for the comments. I did a fresh bootstrap and regression
testing on x86_64-linux-gnu with no new regression. I will wait for you ACK.
Thanks,
Kugan
next prev parent reply other threads:[~2015-05-29 6:33 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-15 7:53 Kugan
2015-04-15 9:05 ` Steven Bosscher
2015-04-15 11:18 ` Richard Biener
2015-04-17 3:19 ` Kugan
2015-05-14 5:57 ` Kugan
2015-05-28 21:52 ` Jeff Law
2015-05-28 21:55 ` Jeff Law
2015-05-29 7:46 ` Kugan [this message]
2015-05-30 5:47 ` Jeff Law
2015-06-01 2:20 ` Kugan
2015-06-02 19:16 ` Jeff Law
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=5568081A.4090103@linaro.org \
--to=kugan.vivekanandarajah@linaro.org \
--cc=gcc-patches@gcc.gnu.org \
--cc=law@redhat.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).