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 B3862384B0C1; Tue, 21 Apr 2020 16:14:15 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B3862384B0C1
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1587485655;
 bh=9QxYZRbHUSAIgFtFRVbsif+PpeCwAxvO32XJiKRW1qM=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=aomlGpgknxzYj+Q486EiueRsUf40BQuif0HbizCjqXLT188ej3O7bbsq+HVym0wBB
 vvsybMqx/veeoL5yHXsunHhIIRWtOrt+52i9rVFL/AFZPrUgBPuMhgEN19ry1Y83bu
 GrnjjEm3aN7rDowfXhe/tVbHxRAf3L7jfcB+ZkhY=
From: "clyon at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/70164] [8/9/10 Regression] Code/performance
 regression due to poor register allocation on Cortex-M0
Date: Tue, 21 Apr 2020 16:14:15 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Version: 6.0
X-Bugzilla-Keywords: missed-optimization, ra
X-Bugzilla-Severity: normal
X-Bugzilla-Who: clyon at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 8.5
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-70164-4-v7qswRfkEu@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-70164-4@http.gcc.gnu.org/bugzilla/>
References: <bug-70164-4@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
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <http://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Tue, 21 Apr 2020 16:14:15 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D70164

--- Comment #26 from Christophe Lyon <clyon at gcc dot gnu.org> ---
For what CPU did you configure GCC?
With today's trunk I still see the same code as in comment #24.

I can get the same code as you have in comment #25 if I force -mcpu=3Dcorte=
x-a9.

The bug report is about cortex-m0, so you either need to configure GCC
--with-cpu=3Dcortex-m0 or use -mcpu=3Dcortex-m0=