From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id B20FC3857B89; Tue, 26 Mar 2024 10:09:46 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B20FC3857B89 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1711447786; bh=UOSG+F0rQrMe/YxXQ5ykz5Lv+CZLeKhPmIv7vVKtFqU=; h=From:To:Subject:Date:In-Reply-To:References:From; b=pFUl3nLOnLIc9xzgso6pQiWie1o5jWQQJxHuE16zXewFICbn7d1zpFnlAPNFK8Ox5 o/uj5yD5t+aMTMxao9glbRWuJ0wSpYnGSLYmvZVrKE89OB8JRWo3vv5BBpJEgwll1n XVBoiq7zKj7qRCT6wfyOJZQlSd6yjnGMgACyneG4= From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/114403] [14 regression] LLVM miscompiled with -O3 -march=znver2 -fno-vect-cost-model since r14-6822-g01f4251b8775c8 Date: Tue, 26 Mar 2024 10:09:44 +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: needs-reduction, wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P1 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=3D114403 --- Comment #18 from Richard Biener --- Just as hint we've had wrong upper bounds on vectorized loops/epilogues whi= ch would trigger wrong unrolling. But then unrolling also always hints as eventually having wrong range-info.=