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 476693858D37; Fri,  1 Sep 2023 02:04:46 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 476693858D37
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1693533886;
	bh=XBG1XZMomAEPeyGbRNgkY2PpJh4ybwE0Bhch5Fe4Kg0=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=emIKOIE0EkDM8nudOp2yzOWOH2+RIA2nINVh/1A8YCu7ETJDEM1vSV3gph78WYRKy
	 x4uBWUXe2URrJMLGbwj/jtaume3JorbLXb054B5iRRxljLwG1ABDT6G31zIhtoLuf9
	 9Igk6gz714Lw6Lj1zzpxrQDrzNoWPlyIw02zAGlg=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/110484] Spec2017 541 after adding the
 '-flto-fomit-frame-pointer' optimization, after optimizing the rnreg,
 directly replaced other registers with the $r22 register, so that the value
 of the $r22 register was destroyed without being saved.
Date: Fri, 01 Sep 2023 02:04:44 +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: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
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: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-110484-4-zp52BkQsiP@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-110484-4@http.gcc.gnu.org/bugzilla/>
References: <bug-110484-4@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=3D110484

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by LuluCheng <chenglulu@gcc.gnu.org>:

https://gcc.gnu.org/g:1967f21d000e09d3d3190317af7923b578ce02b1

commit r14-3605-g1967f21d000e09d3d3190317af7923b578ce02b1
Author: Lulu Cheng <chenglulu@loongson.cn>
Date:   Thu Jun 29 19:30:59 2023 +0800

    LoongArch: Fix bug in loongarch_emit_stack_tie [PR110484].

    Which may result in implicit references to $fp when frame_pointer_neede=
d is
false,
    causing regs_ever_live[$fp] to be true when $fp is not explicitly used,
    resulting in $fp being used as the target replacement register in the r=
nreg
pass.

    The bug originates from SPEC2017 541.leela_r(-flto).

    gcc/ChangeLog:

            PR target/110484
            * config/loongarch/loongarch.cc (loongarch_emit_stack_tie): Use=
 the
            frame_pointer_needed to determine whether to use the $fp regist=
er.

    Co-authored-by: Guo Jie <guojie@loongson.cn>=