From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 88351 invoked by alias); 27 Nov 2015 17:56:04 -0000 Mailing-List: contact gcc-patches-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-patches-owner@gcc.gnu.org Received: (qmail 88340 invoked by uid 89); 27 Nov 2015 17:56:03 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-1.7 required=5.0 tests=AWL,BAYES_00,KAM_LAZY_DOMAIN_SECURITY,RCVD_IN_DNSWL_LOW autolearn=no version=3.3.2 X-HELO: smtp.eu.adacore.com Received: from mel.act-europe.fr (HELO smtp.eu.adacore.com) (194.98.77.210) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES256-GCM-SHA384 encrypted) ESMTPS; Fri, 27 Nov 2015 17:56:02 +0000 Received: from localhost (localhost [127.0.0.1]) by filtered-smtp.eu.adacore.com (Postfix) with ESMTP id A19BB352FB50; Fri, 27 Nov 2015 18:55:59 +0100 (CET) Received: from smtp.eu.adacore.com ([127.0.0.1]) by localhost (smtp.eu.adacore.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id EEdCcb9Y6gmg; Fri, 27 Nov 2015 18:55:59 +0100 (CET) Received: from polaris.localnet (bon31-6-88-161-99-133.fbx.proxad.net [88.161.99.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.eu.adacore.com (Postfix) with ESMTPSA id 3FAFE352FB2D; Fri, 27 Nov 2015 18:55:59 +0100 (CET) From: Eric Botcazou To: Alan Lawrence Cc: gcc-patches@gcc.gnu.org, Jakub Jelinek , Ramana Radhakrishnan , Richard Earnshaw , fweimer@redhat.com Subject: Re: [PATCH 1/2][ARM] PR/65956 AAPCS update for alignment attribute Date: Fri, 27 Nov 2015 18:17:00 -0000 Message-ID: <2078951.fh4hk6FOBb@polaris> User-Agent: KMail/4.14.9 (Linux/3.16.7-29-desktop; KDE/4.14.9; x86_64; ; ) In-Reply-To: References: <5596A98A.7080500@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-SW-Source: 2015-11/txt/msg03392.txt.bz2 > So, I'm not familiar with Ada 'fat pointers' but if that is one - > well, it's a record, with an alignment that the 'new' AAPCS now > ignores, so yes the ABI has changed between gcc 5.1 and 5.2, rather > more significantly for Ada than for C. Yes, XUP suffixed types are fat pointers and they are maximally aligned so that they can be given non-BLK mode and, consequently, live in registers. > Thoughts? There is no official ABI for Ada so I guess that's not really a problem as long as it's documented on https://gcc.gnu.org/gcc-5/changes.html. -- Eric Botcazou