public inbox for gcc-patches@gcc.gnu.org
 help / color / mirror / Atom feed
From: Jeff Law <jeffreyalaw@gmail.com>
To: Kito Cheng <kito.cheng@sifive.com>,
	"Wang, Yanzhang" <yanzhang.wang@intel.com>
Cc: "gcc-patches@gcc.gnu.org" <gcc-patches@gcc.gnu.org>,
	"juzhe.zhong@rivai.ai" <juzhe.zhong@rivai.ai>,
	"Li, Pan2" <pan2.li@intel.com>
Subject: Re: [PATCH v3] RISC-V: Fix regression of -fzero-call-used-regs=all
Date: Mon, 10 Apr 2023 14:57:43 -0600	[thread overview]
Message-ID: <e26e1337-f181-37ad-0b4e-11e639df4dd5@gmail.com> (raw)
In-Reply-To: <CALLt3TiW=LGG0TN7ZBxKxDEmSQJ61FPbW+ojFhO4Tq_2GYKRUw@mail.gmail.com>




On 4/9/23 21:11, Kito Cheng wrote:

> I think one keypoint here is -fzero-call-used-regs=* emit zeroing
> instruction before return, that means there won't be any vector
> operations between return and zeroing instructions, so we don't need
> to restore the vcsr after zeroing.
Oh yea, makes perfect sense.  Thanks.
jeff

  reply	other threads:[~2023-04-10 20:57 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-04-06 13:34 [PATCH] " yanzhang.wang
2023-04-06 13:47 ` juzhe.zhong
2023-04-06 14:59   ` Kito Cheng
2023-04-07  6:59 ` [PATCH v2] " yanzhang.wang
2023-04-07  7:07   ` Kito Cheng
2023-04-07 12:32 ` [PATCH v3] " yanzhang.wang
2023-04-08 18:39   ` Jeff Law
2023-04-10  2:21     ` Wang, Yanzhang
2023-04-10  3:11       ` Kito Cheng
2023-04-10 20:57         ` Jeff Law [this message]
2023-04-10  3:00 ` [PATCH v4] " yanzhang.wang
2023-04-11 11:37 ` [PATCH v5] " yanzhang.wang
2023-04-11 12:00   ` Wang, Yanzhang
2023-04-11 14:11     ` Kito Cheng

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=e26e1337-f181-37ad-0b4e-11e639df4dd5@gmail.com \
    --to=jeffreyalaw@gmail.com \
    --cc=gcc-patches@gcc.gnu.org \
    --cc=juzhe.zhong@rivai.ai \
    --cc=kito.cheng@sifive.com \
    --cc=pan2.li@intel.com \
    --cc=yanzhang.wang@intel.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).