From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 68BC8385E038; Wed, 24 Aug 2022 15:03:57 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 68BC8385E038 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1661353437; bh=m1xwpzvB+2DP/GEaWojVEq/JSY4+v2WKRV8657IL5fA=; h=From:To:Subject:Date:In-Reply-To:References:From; b=I4f8A0F+DYMzs3sHpBsCZ2A2nVh8fXGn8sRPPY6U3xWjUmdWwcuydJnCXv5J8CKDM o7rqe27cxPJXvJ/ZJ2HxyY053NKUuQYlsnH+mfb8pUOtJasTWobbvoioqNacpeJ0pt WeHZIU4x0+6w7CrL5TlMd/q9aj2UC+LvCftmJbhs= From: "pinskia at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/91213] Missed optimization: (sub X Y) -> (xor X Y) when Y <= X and isPowerOf2(X + 1) Date: Wed, 24 Aug 2022 15:03:57 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Version: 10.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: enhancement X-Bugzilla-Who: pinskia at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: assigned_to 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=3D91213 Andrew Pinski changed: What |Removed |Added ---------------------------------------------------------------------------- Assignee|pinskia at gcc dot gnu.org |unassigned at gcc d= ot gnu.org --- Comment #5 from Andrew Pinski --- I am no longer working on this. Yes expansion should do it rather than matc= h.=