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 X-Spam-Level: X-Spam-Status: No, score=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DDCCAC00449 for ; Mon, 8 Oct 2018 10:56:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 91FA720652 for ; Mon, 8 Oct 2018 10:56:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 91FA720652 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.crashing.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727427AbeJHSH6 (ORCPT ); Mon, 8 Oct 2018 14:07:58 -0400 Received: from gate.crashing.org ([63.228.1.57]:43013 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726612AbeJHSH6 (ORCPT ); Mon, 8 Oct 2018 14:07:58 -0400 Received: from gate.crashing.org (localhost.localdomain [127.0.0.1]) by gate.crashing.org (8.14.1/8.14.1) with ESMTP id w98A2pvY009011; Mon, 8 Oct 2018 05:02:51 -0500 Received: (from segher@localhost) by gate.crashing.org (8.14.1/8.14.1/Submit) id w98A2k5p008969; Mon, 8 Oct 2018 05:02:46 -0500 X-Authentication-Warning: gate.crashing.org: segher set sender to segher@kernel.crashing.org using -f Date: Mon, 8 Oct 2018 05:02:46 -0500 From: Segher Boessenkool To: Richard Biener Cc: Michael Matz , Borislav Petkov , gcc@gcc.gnu.org, Nadav Amit , Ingo Molnar , linux-kernel@vger.kernel.org, x86@kernel.org, Masahiro Yamada , Sam Ravnborg , Alok Kataria , Christopher Li , Greg Kroah-Hartman , "H. Peter Anvin" , Jan Beulich , Josh Poimboeuf , Juergen Gross , Kate Stewart , Kees Cook , linux-sparse@vger.kernel.org, Peter Zijlstra , Philippe Ombredanne , Thomas Gleixner , virtualization@lists.linux-foundation.org, Linus Torvalds , Chris Zankel , Max Filippov , linux-xtensa@linux-xtensa.org Subject: Re: PROPOSAL: Extend inline asm syntax with size spec Message-ID: <20181008100245.GP29268@gate.crashing.org> References: <20181003213100.189959-1-namit@vmware.com> <20181007091805.GA30687@zn.tnic> <20181007132228.GJ29268@gate.crashing.org> <20181008073128.GL29268@gate.crashing.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Oct 08, 2018 at 11:07:46AM +0200, Richard Biener wrote: > > All of a targets register names and alternative register names are > > allowed in the clobber list. Will that never conflict with an attribute > > name? We already *have* syntax for specifying attributes on an asm (on > > *any* statement even), so mixing these two things has no advantage. > > Heh, but I failed to make an example with attribute synatx working. > IIRC attributes do not work on stmts. What could work is to use > a #pragma though. Apparently statement attributes currently(?) only work for null statements. Oh well. Segher