From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 39D8D38582A7; Tue, 23 Jan 2024 13:02:59 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 39D8D38582A7 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1706014979; bh=FGIXLaMPn7/1gqC9fPYdBxpFv25mcIlKnRaLvgiKlik=; h=From:To:Subject:Date:In-Reply-To:References:From; b=oQrdoZWAcwqcsa4dUkjywhAb7qWjYbauoegAgESWC8bWkyDyntDDsnm/V1kOvy/Vw Lm5g2oUzryJG7s+oJNWzUb/RMu6kbdlPKrdOay01F+LPVA/MylPQtcJO9qSA0l+TDy 7Si1IxK0jM4sENBV6YsAhPAorIaYjQm3OVK75Hhw= From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/113441] [14 Regression] Fail to fold the last element with multiple loop Date: Tue, 23 Jan 2024 13:02:58 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 14.0 X-Bugzilla-Keywords: missed-optimization, needs-bisection X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth 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: 14.0 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 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113441 --- Comment #21 from Richard Biener --- On aarch64 I can see already GCC 13.2 looking very much different from 12.3, but I can't decipher the code to decide whether 12.3 vectorizes the loop or not. trunk looks similar to 13.2 here, so the bisected change can't really be responsible here.=