From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pj1-x1029.google.com (mail-pj1-x1029.google.com [IPv6:2607:f8b0:4864:20::1029]) by sourceware.org (Postfix) with ESMTPS id A0F6D3858D32 for ; Thu, 6 Apr 2023 14:49:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org A0F6D3858D32 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-x1029.google.com with SMTP id e15-20020a17090ac20f00b0023d1b009f52so43082301pjt.2 for ; Thu, 06 Apr 2023 07:49:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; t=1680792542; x=1683384542; 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=l2mPckIOtE55z1AfjCQy9BgBBKMFSJ0f0KxWDBBJwFU=; b=QgkuZENN4c/+ipNQWdl2qGlDP/XK4aNtN0hFRNAekC5TecU3v8RNPMyW9oxNzcyb3+ zZ3rAnettF9U0MOQGkjCuEQGWSr1HD7HwEzbhemxgDajEllM8CuJdM6G1MyXHBIK/Ac0 21tp+ImPbNRB/t0d/2kjaZtXg4PFRJp+HY0TcoLcF4+3oE0LIZRIcWNpDFrRMpq/OMUJ Av9ZQ9fsSPA5Oq7s5sqTZvWqj0xtS7T+CJsjdVg9YcDSVbzs9xBY+ReDGQeGo9paQBVL SSaKl5TR41WfiIoeXsSzatMW1kQv6e5JVcKf4y62yFOi2GuZMW/RmYYjjtDMdhV3K6Mu obEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680792542; x=1683384542; 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=l2mPckIOtE55z1AfjCQy9BgBBKMFSJ0f0KxWDBBJwFU=; b=gYmbnO8ftOMG6qi6gRB/luhdJRRnXcI2qOVLFw18v/x1aV9ENdMfkjX3MuDN6WO0Mm EcgpY7Qdww1Df7e16Mj9bSbZtB7O3I3Yr6kEx9N/+R5hJnq67VjZc54Q+QsXdfuNwhkD MLE9zRNy5YncXU5pyaHKNCiRYcR9wTTzgXO1a6K8GAYbKdPhYwLM22n0T7G9scFrJKX1 HB3roFillxVhAQZtNHkQEz3XE/qk+xk2ELL7+hgZsmBxCNR+WYzpuYifyad75Y++8CW5 3tf7FXzhfakfilmkIlm/jD2NlsHvTigiZHoFlm0Rhnd+KBlcFWFZE197mRZvBXVTWf0a uEtg== X-Gm-Message-State: AAQBX9eHAMDK2bF2uNQBH4zgFUZQ1SeW/mSzF51vjwkCNmnRaFCBSnMQ xdae8jgKinJuaduRrmC50no= X-Google-Smtp-Source: AKy350ZeJbzah1ZUHrJVvqxCDh88JSKFKShfaYEWGJmyqh5Ec73cxiBRwYxbT8A20YkBINLI985K6g== X-Received: by 2002:a17:903:2452:b0:19f:3b86:4710 with SMTP id l18-20020a170903245200b0019f3b864710mr12483535pls.49.1680792542618; Thu, 06 Apr 2023 07:49:02 -0700 (PDT) Received: from ?IPV6:2601:681:8600:13d0::f0a? ([2601:681:8600:13d0::f0a]) by smtp.gmail.com with ESMTPSA id jk19-20020a170903331300b0019c91d3bdb4sm1453530plb.304.2023.04.06.07.49.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 06 Apr 2023 07:49:02 -0700 (PDT) Message-ID: <424430c7-3d23-ce98-1c6b-c853dedbbbfe@gmail.com> Date: Thu, 6 Apr 2023 08:49:00 -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] dse: Handle SUBREGs of word REGs differently for WORD_REGISTER_OPERATIONS targets [PR109040] Content-Language: en-US To: "Li, Pan2" , Richard Sandiford Cc: Jakub Jelinek , Richard Biener , Eric Botcazou , "gcc-patches@gcc.gnu.org" , "kito.cheng@sifive.com" , "juzhe.zhong@rivai.ai" References: <8e0e3cd5-e4db-ce8a-b7dc-baac32aed516@gmail.com> <612b6215-8bc3-1174-a475-4315176bfe1c@gmail.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=-3.4 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 4/6/23 03:37, Li, Pan2 wrote: > Yes, RISC-V riscv.h defined the WORD_REGISTER_OPERATIONS to be 1, while aarch64.h defined it as 0, with below comments. No idea this can fit RISC-V or not. I don't see any fundamental reason why it won't work. Most of the expansion code already has code to widen types as necessary. And given that we have a subset of 32bit ops, even in 64bit modes makes a WORD_REGISTER_OPERATIONS 0 a more sensible choice. Jeff