From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 947DC3858C5E; Thu, 28 Mar 2024 10:29:20 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 947DC3858C5E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1711621760; bh=XK3bVsou//X1W8pQqCdntY6Dir8dH5v7AeN30cAiT4k=; h=From:To:Subject:Date:In-Reply-To:References:From; b=bCeP0zhE6Uo13OGdap6Ns/WzDXjgIJ6aaE828LNB6uc0um8ovg3kdrKmBwjlTKw2/ EyZuf+KbkVCqq+9bAoahAfRZK5lxFjPeMx2oRXxBwznRC3COiMhQk4X5PYR9q6DlUQ DMmgUsIEowA1sslkRIYlVl7CD7BUe9rszvR6QYWQ= From: "rsandifo at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/114515] [14 Regression] Failure to use aarch64 lane forms after PR101523 Date: Thu, 28 Mar 2024 10:29:20 +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: 14.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: rsandifo 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=3D114515 --- Comment #4 from Richard Sandiford --- (In reply to Richard Biener from comment #1) > Btw, why does forwprop not do this? Not 100% sure (I wasn't involved in choosing the current heuristics). But fwprop can propagate across blocks, so there is probably more risk of increasing register pressure.=