From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id DA8FE386F839; Mon, 29 Jun 2020 09:45:14 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org DA8FE386F839 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1593423914; bh=mO2ERKKgoNHuyta3lKRD56zfxV+7wsURMhVF9LyCyUc=; h=From:To:Subject:Date:In-Reply-To:References:From; b=LLKr3+/DkkdOgfzdbjPTpEEBqiZVdrdnm4TqwBiyJWl3CuET7SbHRPvcLjxoCtms/ pg4+acz7ndPZ0TizmRvUXHq+sXDniiy0W8VO8v4gtsPb4A/yzLvBp1nAZDsdnc0raz KgoD5hRufdyRM90ZwM+8+5BsWaCx0cCiQE0Eh3e0= From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/95926] Failure to optimize xor pattern when using temporary variable Date: Mon, 29 Jun 2020 09:45:14 +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: 11.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth 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: cf_reconfirmed_on bug_status everconfirmed 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 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 29 Jun 2020 09:45:15 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95926 Richard Biener changed: What |Removed |Added ---------------------------------------------------------------------------- Last reconfirmed| |2020-06-29 Status|UNCONFIRMED |NEW Ever confirmed|0 |1 --- Comment #2 from Richard Biener --- Note :s tries to overcome this for "single" result operations like a ^ b but single_use () checks make that stronger (and fail).=