From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id CBF3E385840D; Fri, 3 Feb 2023 09:44:44 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CBF3E385840D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1675417484; bh=m7zeF0gJ+XUeRR+/OCyLOh9Qk97fLDt+GuKECCFHhgI=; h=From:To:Subject:Date:In-Reply-To:References:From; b=wCtntTFaPYJ8ADxAGCZ2wso/ilE3k1Yo15WPrnue+xjH0wdjpcVKaeLPb4Ces0YsN h4YehS46b+2XgKrFssUdzPq4Vl0pPVijGjHbHFgBXtAjgdroRNszLh7q+Jkpvn9nBS ur649CMcwCn3aZ2hKQdwxTh9BBWsVNNxO9IjJTHI= From: "ubizjak at gmail dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/104054] [10/11/12/13 Regression] '-fcompare-debug' failure (length) w/ -Os -funroll-loops since r8-3946-gfe94440235cfaa57 Date: Fri, 03 Feb 2023 09:44:43 +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: 12.0 X-Bugzilla-Keywords: compare-debug-failure X-Bugzilla-Severity: normal X-Bugzilla-Who: ubizjak at gmail dot com 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: 10.5 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=3D104054 --- Comment #11 from Uro=C5=A1 Bizjak --- The testcase now PASSes compare-debug with: gcc version 13.0.1 20230203 (experimental) [master r13-5678-g167b04b9b8a] (= GCC) ... but passes due to different register allocation, where regrename is not triggered. The core of the problem (See Comment #8) remains unfixed, and it will require some deep surgery into regrename pass.=