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 [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 537F23858281 for ; Mon, 17 Oct 2022 13:07:15 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 537F23858281 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=redhat.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1666012035; h=from:from:reply-to:subject:subject: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=cSeAdOwlPsHybQB0eMhhgF6MA4yFOCJ5YbwjkYg6iKw=; b=jOZeXCJ64CSD47gCKSwfKIgxzSX+e+msnM+4D+79D3o/hMsUWYMNDkdFCiBjI1PtBtNd/1 CZVP5K4cM9UHLLsvrplJcmWp+YrT38D/OUa74Hq17iiplJxkwsip6yWpxLlgJhpMqPfOVE HvtHC/yWUzJPVcwoBZOsPwAY+wexrCw= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-206-89HCEeFJOiekMjL-wxM2Aw-1; Mon, 17 Oct 2022 09:07:13 -0400 X-MC-Unique: 89HCEeFJOiekMjL-wxM2Aw-1 Received: from smtp.corp.redhat.com (int-mx08.intmail.prod.int.rdu2.redhat.com [10.11.54.8]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 93A30811E67; Mon, 17 Oct 2022 13:07:13 +0000 (UTC) Received: from oldenburg.str.redhat.com (unknown [10.39.193.168]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 13D39C15BB3; Mon, 17 Oct 2022 13:07:12 +0000 (UTC) From: Florian Weimer To: Andreas Schwab Cc: Florian Weimer via Libc-alpha Subject: Re: [PATCH] libgcc: Mostly vectorize CIE encoding extraction for FDEs References: <87mt9umxu4.fsf@oldenburg.str.redhat.com> Date: Mon, 17 Oct 2022 15:07:11 +0200 In-Reply-To: (Andreas Schwab's message of "Mon, 17 Oct 2022 15:03:31 +0200") Message-ID: <87a65umwe8.fsf@oldenburg.str.redhat.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.8 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain X-Spam-Status: No, score=-4.8 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_H2,SPF_HELO_NONE,SPF_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: * Andreas Schwab: > On Okt 17 2022, Florian Weimer via Libc-alpha wrote: > >> + unsigned long long value = *(const unsigned long long *) &cie->version; > > Is that strict-aliasing safe? Should be, the data is never written to during the program's life-time. libgcc doesn't use memcpy consistently for reading this constant data. Instead it uses non-char types to read things. > I guess you wanted to send that to gcc-patches@. Right. Thanks, Florian