From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CC191C433F5 for ; Tue, 5 Apr 2022 12:42:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234661AbiDEMo2 (ORCPT ); Tue, 5 Apr 2022 08:44:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45634 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1384316AbiDEM1U (ORCPT ); Tue, 5 Apr 2022 08:27:20 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80CE91081; Tue, 5 Apr 2022 04:37:27 -0700 (PDT) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id 437051F745; Tue, 5 Apr 2022 11:37:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1649158646; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=x/t3SjRnhPaSXevc9vrywYcQpK4eEOXAuLXInpS+vPM=; b=g5NkbI2Uzazs6PjANwf0oKp0CY8k/1d3EI+ZMtTjf4vt+uaq6mYDRabxyyYPsAc6BQ9ETo CgvrzD2MBCjEuVmeGDxKOQuBeIBUu1+wcQeF1Uc8CR4B8/YfsWGSuZk7DfLyuX6ppD+pQ9 399xQy4mm72wqT32d2nHWM59mkQsmr4= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1649158646; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=x/t3SjRnhPaSXevc9vrywYcQpK4eEOXAuLXInpS+vPM=; b=tRp6stXVdOFLRWkZCE2HKzJru0KgZXVn5CMQWw+qQWhAgcr0/CZatdQnQhqSnKqnTTlkUS RXwb0GWRr+Wa6oAw== Received: from murzim.suse.de (murzim.suse.de [10.160.4.192]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by relay2.suse.de (Postfix) with ESMTPS id 3C8B8A3B88; Tue, 5 Apr 2022 11:37:26 +0000 (UTC) Date: Tue, 5 Apr 2022 13:37:26 +0200 (CEST) From: Richard Biener To: Borislav Petkov cc: linux-toolchains@vger.kernel.org, Michael Matz , lkml Subject: Re: older gccs and case labels producing integer constants In-Reply-To: Message-ID: References: <7o5nn52-nqn1-oo13-s6o9-59r85r91o768@fhfr.qr> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="-1609908220-1109596832-1649158646=:27745" Precedence: bulk List-ID: X-Mailing-List: linux-toolchains@vger.kernel.org This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. ---1609908220-1109596832-1649158646=:27745 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8BIT On Tue, 5 Apr 2022, Borislav Petkov wrote: > On Tue, Apr 05, 2022 at 12:06:45PM +0200, Richard Biener wrote: > > Wird auch mit gcc 11 rejected. Kanns sein dass mit gcc 7 andere > > compiler flags genommen werden? > > Found it: > > $ gcc -fsanitize=shift -c switch.c > switch.c: In function ‘foo’: > switch.c:10:7: error: case label does not reduce to an integer constant > case (((0xfc08) << 16) | (0x0101)):; > > $ gcc --version > gcc (SUSE Linux) 7.4.1 20190905 [gcc-7-branch revision 275407] > Copyright (C) 2017 Free Software Foundation, Inc. > > Something not fully backported? Probably early vs. late folding change in the frontend. So yes, don't use -fsanitize=... ;) Richard. -- Richard Biener SUSE Software Solutions Germany GmbH, Maxfeldstrasse 5, 90409 Nuernberg, Germany; GF: Ivo Totev; HRB 36809 (AG Nuernberg) ---1609908220-1109596832-1649158646=:27745--