From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [216.205.24.124]) by sourceware.org (Postfix) with ESMTP id 976D2383F840 for ; Mon, 5 Oct 2020 13:29:25 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 976D2383F840 Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-35-Q2VP4Vz2P56SKNMJuc3KZQ-1; Mon, 05 Oct 2020 09:29:23 -0400 X-MC-Unique: Q2VP4Vz2P56SKNMJuc3KZQ-1 Received: from smtp.corp.redhat.com (int-mx04.intmail.prod.int.phx2.redhat.com [10.5.11.14]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id F37798030A9; Mon, 5 Oct 2020 13:29:21 +0000 (UTC) Received: from oldenburg2.str.redhat.com (ovpn-113-11.ams2.redhat.com [10.36.113.11]) by smtp.corp.redhat.com (Postfix) with ESMTPS id A8A215D9CD; Mon, 5 Oct 2020 13:29:20 +0000 (UTC) From: Florian Weimer To: Harald van Dijk via Gcc-help Cc: Segher Boessenkool , Harald van Dijk Subject: Re: Inline assembly and value extensions References: <8985cc81-573c-b011-4e02-aa9829524133@gigawatt.nl> <3c338ceb-1dfa-5c15-8295-5b5a7dd4bad7@gigawatt.nl> <20201005125328.GA2672@gate.crashing.org> Date: Mon, 05 Oct 2020 15:29:18 +0200 In-Reply-To: (Harald van Dijk via Gcc-help's message of "Mon, 5 Oct 2020 14:26:19 +0100") Message-ID: <87ft6sx0lt.fsf@oldenburg2.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H5, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on server2.sourceware.org X-BeenThere: gcc-help@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-help mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 05 Oct 2020 13:29:27 -0000 * Harald van Dijk via Gcc-help: > In the x32 ABI, pointers do not have a single mode. They are SImode, > except when passed as parameters or returned, in which case they are > DImode (see the ix86_promote_function_mode function I mentioned). This > is really the source of the problems. I think that GCC cannot optimize away unecessary sign and zero extensions is also a contributing factor, no? Thanks, Florian -- Red Hat GmbH, https://de.redhat.com/ , Registered seat: Grasbrunn, Commercial register: Amtsgericht Muenchen, HRB 153243, Managing Directors: Charles Cachera, Brian Klemm, Laurie Krebs, Michael O'Neill