From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pj1-x1030.google.com (mail-pj1-x1030.google.com [IPv6:2607:f8b0:4864:20::1030]) by sourceware.org (Postfix) with ESMTPS id 9FC023858C5E for ; Mon, 10 Apr 2023 20:57:48 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 9FC023858C5E Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-pj1-x1030.google.com with SMTP id px4so3531743pjb.3 for ; Mon, 10 Apr 2023 13:57:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1681160265; x=1683752265; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=f7mIN30i/sCcD0BvH59dfXfOGWzPvEH81fKEx2RIC5s=; b=XxiRrD3tiJ5d0jmwDNH1xVf10XVlIAjFoJadN5OrkuyGM4nAaEQrEIjulbVGfaM7TJ /Hhes98Wzhzzmi6Yk/IBTOkEeSnrB6feXybAmg4MZZJnz+AB/Lshy7INoUiB04sN97Ta q6o8aw4qh0Nc1blfDvl1pfu2FsemeM21MhAB+S+52Du2kpnVXrIvFXu7T7xiBrCAeGmJ 4ijjRhcmMV7kueQ4plwTCbUeNVWGRX+3cdq7VVJfzgRcuPfdltXUQVRCpa67wn2f7Vzc KMP5n9d1oFpGAQ3K+Lvn5ZeldjJUn+BzE2lEEjiuhqIdHzufohCZ8+0fiCV/nXukIX9m zFhg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1681160265; x=1683752265; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=f7mIN30i/sCcD0BvH59dfXfOGWzPvEH81fKEx2RIC5s=; b=Pc68HtX/SHq5aV+iMbsovLWzD4L9l+rWAZTy/uftHQO7iSemafSbyiuxt87NzlchHW y59CjJJwRqnMQhIx4K+M9TbMHjtlgLVBNEK9hTUOD9DAkBYIendZgnZ1kAl62Dg9z8b9 VevKi5M4jOhg44p3qaN3rwoPyka41TV3HbftDn2hHUBX75mpRibCES/n2XHBmNmNQmp1 THcRuQLVhoNcoKg/QDBSU2+w9z8GUZL2PhtTFEi7LuBI+KD18XXQVrIiqvy61nal3QDF VmDOfraApxogQOuZmYI8oFjL5uDD1lTDpCN5wopOTfmOAawCMvmPwZaQqIpJX0BWXG23 b1fA== X-Gm-Message-State: AAQBX9fTnjUvXbZkctr8ViI6LLJaxd6/0edslz8WsdsgnlGw8iIXNOLK k8wk5NAxKKnQpBlvfE92uV4= X-Google-Smtp-Source: AKy350Y3pE+m09a7aQ9fQHyMGoGCw1wc40Y3RtDhO79MeBixDKEYLJz85Xdv39uoW0TV3UVMp5MZNg== X-Received: by 2002:a05:6a20:6d92:b0:da:6e45:6056 with SMTP id gl18-20020a056a206d9200b000da6e456056mr7049439pzb.43.1681160265246; Mon, 10 Apr 2023 13:57:45 -0700 (PDT) Received: from ?IPV6:2601:681:8600:13d0::f0a? ([2601:681:8600:13d0::f0a]) by smtp.gmail.com with ESMTPSA id g16-20020a62e310000000b0062612b97cfdsm3280259pfh.123.2023.04.10.13.57.44 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 10 Apr 2023 13:57:44 -0700 (PDT) Message-ID: Date: Mon, 10 Apr 2023 14:57:43 -0600 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.0 Subject: Re: [PATCH v3] RISC-V: Fix regression of -fzero-call-used-regs=all Content-Language: en-US To: Kito Cheng , "Wang, Yanzhang" Cc: "gcc-patches@gcc.gnu.org" , "juzhe.zhong@rivai.ai" , "Li, Pan2" References: <20230406133441.1944365-1-yanzhang.wang@intel.com> <20230407123249.2600968-1-yanzhang.wang@intel.com> From: Jeff Law In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-4.0 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,NICE_REPLY_A,RCVD_IN_DNSWL_NONE,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: On 4/9/23 21:11, Kito Cheng wrote: > I think one keypoint here is -fzero-call-used-regs=* emit zeroing > instruction before return, that means there won't be any vector > operations between return and zeroing instructions, so we don't need > to restore the vcsr after zeroing. Oh yea, makes perfect sense. Thanks. jeff