From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 7A5D73858C33; Fri, 15 Sep 2023 04:13:24 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 7A5D73858C33 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1694751204; bh=TW95l6u6jXrPNGk1+2Zc2d89+Qp81sZQqy06T//hEDo=; h=From:To:Subject:Date:In-Reply-To:References:From; b=t0VmVgDKbFA8GV7sQij5PYxvPGF5wwvUWAbyesmNYaPYBfy6I8oVf2xgNw2NwJxgt HFm6OJhxaE94HuOtF3d9tzJSIYDvY2N5sttlBZz1es7UR7HWPWdAR7+vg63glOfAK/ R55/OKFIn/o6FNng4Ia4E0rbD8hFIVbZH+FyC2Wc= From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/110992] [13/14 Regression] missed VRP optimization due to transformation of `a & -zero_one_valued_p` into `a * zero_one_valued_p` Date: Fri, 15 Sep 2023 04:13:24 +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 X-Bugzilla-Severity: normal X-Bugzilla-Who: pinskia at gcc dot gnu.org X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: pinskia at gcc dot gnu.org X-Bugzilla-Target-Milestone: 13.3 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=3D110992 --- Comment #7 from Andrew Pinski --- Actually we should transform it into ((convert)zero_one_valued_p) & (a !=3D 0) Or ^1 for the =3D=3D 0 case ... This should allow for better code I think.=