From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id A12EF3857809; Tue, 6 Apr 2021 14:41:31 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A12EF3857809 From: "mike.robins at talktalk dot net" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/99937] Optimization needed for ARM with single cycle multiplier Date: Tue, 06 Apr 2021 14:41:31 +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: 10.2.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: mike.robins at talktalk dot net 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: In-Reply-To: References: 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 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 06 Apr 2021 14:41:31 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99937 --- Comment #2 from mike.robins at talktalk dot net --- (In reply to Richard Biener from comment #1) > You need to adjust RTX costing accordingly which likely means adding a new > subtarget tuning. Hi Richard Are you saying that this would have to be added at the GCC source level somehow. I.e that there is no existing -mtune... or -f... to achieve this? Mike=