From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id C8FE8385742D; Wed, 25 Aug 2021 17:07:19 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C8FE8385742D From: "segher at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug c/102062] powerpc suboptimal unrolling simple array sum Date: Wed, 25 Aug 2021 17:07:19 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: c X-Bugzilla-Version: 11.2.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: segher at gcc dot gnu.org X-Bugzilla-Status: NEW 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: Wed, 25 Aug 2021 17:07:19 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102062 --- Comment #9 from Segher Boessenkool --- Thanks for the detective work! So the variable expansion code could be improved to handle sign extensions better (or maybe zero extensions as well?) In either case that won't help rs6000 much anymore (because the usual case, 32-bit -> 64-bit) doesn't affe= ct us anymore :-) Is there anything left to do here, or can we close the PR?=