From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cc-smtpout1.netcologne.de (cc-smtpout1.netcologne.de [89.1.8.211]) by sourceware.org (Postfix) with ESMTPS id A80693858D37; Sun, 19 Mar 2023 17:40:31 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org A80693858D37 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=netcologne.de Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=netcologne.de Received: from cc-smtpin1.netcologne.de (cc-smtpin1.netcologne.de [89.1.8.201]) by cc-smtpout1.netcologne.de (Postfix) with ESMTP id 13D9712625; Sun, 19 Mar 2023 18:40:30 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=netcologne.de; s=nc1116a; t=1679247630; bh=QXACPwlAEhx3Xur/D82k64GuIsuPVqBDAq9F0tyQssA=; h=Message-ID:Date:Subject:To:Cc:References:From:In-Reply-To:From; b=DX8YkNC7Nq/WsQ5tx23FtUoMQ/Sk9FWykiSceT5IhQL7vjcrgRMkxF6nSrD31riS1 uFj6uMLL2dqkYQl1MY3EUYPJPToCma5tlABmpGpy7GoBFFLVxNAxpt53Wyn3nyT18N Fe6BIcKtawLPt1B7LxHmuasJ4TD3G0iWfKbLS+l/1bphEVmUKgXuri40d+ofd00x2E 1iLfhRGLsKW3uGJi8IN1B+y8whnnjlMJrnCm/hASch3BEl+V0x6UNTeddkIXXp3DdI qn1VheZFsRnq/NIloZ3ydMdtg+x43Rg75Dvm8fTveNYmt4em4qyYB/ZqzmruDTcGuL 9Lpf85PoGH45Q== Received: from [IPV6:2001:4dd6:4ac:0:7285:c2ff:fe6c:992d] (2001-4dd6-4ac-0-7285-c2ff-fe6c-992d.ipv6dyn.netcologne.de [IPv6:2001:4dd6:4ac:0:7285:c2ff:fe6c:992d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by cc-smtpin1.netcologne.de (Postfix) with ESMTPSA id 72D8611DFB; Sun, 19 Mar 2023 18:40:27 +0100 (CET) Message-ID: <80e8f406-3e2c-3871-d225-0a74a620c6f6@netcologne.de> Date: Sun, 19 Mar 2023 18:40:27 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.8.0 Subject: Re: [patch, fortran, doc] Explicitly mention undefined overflow Content-Language: en-US To: Paul Richard Thomas Cc: "fortran@gcc.gnu.org" , gcc-patches References: From: Thomas Koenig In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-NetCologne-Spam: L X-Spamd-Bar: -- X-Rspamd-Action: no action X-Rspamd-Queue-Id: 72D8611DFB X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,KAM_SHORT,NICE_REPLY_A,RCVD_IN_DNSWL_LOW,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE,SPF_PASS,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: Hi Paul, > Yes, that's fine for trunk. I wonder if it is worth being explicit that > linear congruential pseudo-random number generators can and do fail at -O3? I don't think we should put this into the docs, because that can change at any time. Maybe into porting_to.html, though (where I have only mentioned this as a general issue with linear congruential generators, without mentioning specific options. Current text can be seen at https://gcc.gnu.org/gcc-13/porting_to.html ). Hm.... Best regards Thomas