From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id BEF553858D34; Mon, 20 May 2024 08:38:41 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org BEF553858D34
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1716194321;
	bh=HB+poTJUIkb2jEpOImDovzv0yWB7Dg1FV3qP4wB3wNk=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=FJS/Xwptl9ziHXeQ8+QkzbH0RhBKiqoOfkkRBGXary1iocv5fVCRGYs9f4BNylgeI
	 PM6zKsiIdhKSvgno6kBjVjWBkGNl1I0xl54ajXtZPNmP0IpFxW4MEP14deceTKGKc9
	 YyOWaJLn/r9ty4JfKboPWXjGT/JPEyNLE48ylZYA=
From: "haochen.jiang at intel dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/115024] [14/15 regression] 128 bit division performance
 regression, x86, between gcc-14 and gcc-13 using target clones on skylake
 platform
Date: Mon, 20 May 2024 08:38:40 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: normal
X-Bugzilla-Who: haochen.jiang at intel dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 14.2
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-115024-4-Fj9T9PhHPN@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-115024-4@http.gcc.gnu.org/bugzilla/>
References: <bug-115024-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115024

Haochen Jiang <haochen.jiang at intel dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |haochen.jiang at intel dot=
 com

--- Comment #5 from Haochen Jiang <haochen.jiang at intel dot com> ---
>From my test, trunk only has <1% regression if I calculated right.

[haochenj@shgcc101 ~]$ ./13.exe
1240.97 div128 ops per sec
[haochenj@shgcc101 ~]$ ./13.exe
1235.78 div128 ops per sec
[haochenj@shgcc101 ~]$ ./13.exe
1236.95 div128 ops per sec

[haochenj@shgcc101 ~]$ ./trunk.exe
1228.43 div128 ops per sec
[haochenj@shgcc101 ~]$ ./trunk.exe
1227.11 div128 ops per sec
[haochenj@shgcc101 ~]$ ./trunk.exe
1225.42 div128 ops per sec=