From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pl1-x62b.google.com (mail-pl1-x62b.google.com [IPv6:2607:f8b0:4864:20::62b]) by sourceware.org (Postfix) with ESMTPS id 38CE43858D28 for ; Tue, 17 Jan 2023 22:38:02 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 38CE43858D28 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-pl1-x62b.google.com with SMTP id z13so7228694plg.6 for ; Tue, 17 Jan 2023 14:38:02 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=suP8IBu0O2WVyoRk3PkYITkqYVJ4HMh0YHOiTsdi1CI=; b=XSoAMiJisHfibtLpoXPXKt2p1a+tClRbPT3E/Fmd9HSlG5GrI+PHsxl/vPbXjqeH4F zym2PW98XIsfxzNWmvL980zjBFa3lAFaHoRhyEKk8anh8Sv91U9orXBgXiBfTxCG8Mj+ BNqq6+F6YA9rYr00VL3n7H3m5yX/PbdTFUISh+GHg2fzfiHLfcpiOXUMYKXdXpWbhCkG DGSKhMtFMnmoT0GcD6cEseUGnfHLFYHfdESn0wQo4Xvro31nNSOKAzAxbVkIandi7bwR ApvXED1zm1P6onD4X2Oi4NzCDcvSLboHkKuGW5U9lXefYWqmFfRMWbR7SnFDYgpVHq4R 5olA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:from:references: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=suP8IBu0O2WVyoRk3PkYITkqYVJ4HMh0YHOiTsdi1CI=; b=x+zhik06+lgVO5Q2S1fLT+14iZGo8qJ79Vg2ywt00SV72OUUO8aTTkv+xTYdQh5uYZ JOxLoYf8e04mZURbBoum6t5BCyXhj6gOXZevi85moiy9OB2wyJycXGovz0d5IsUSLZRb 2Uz6SXydsdBKlMMzQHEyUzV9TphqfCmKf5KKzaoT6Q750P7lk84vCE1zSrUJeThu3Pgo YpiwP3INYDM9isOJfiLAjR6fpgsiJnyCHoSGgEu/ztNIyiPK32Mp9pNboGveXOLAEEUb uTY7PG6uN7TtnjtlwOwPmQLnsVa9X/nz4QJeIfs8P7l85QfsWwO60ne4iKTHgQNj79Jt Ff9Q== X-Gm-Message-State: AFqh2kpB3H2JMch8HX8fTGcvQqwC9k02LfDXbbJO0cbBdcAGHWEaocbL HxI2xUch68yfG0mPjy04tevFg5CKLaI= X-Google-Smtp-Source: AMrXdXsiRAu4UlYogSmUrI31YUEraCyUZ+LdvJreeOntJUiz2glxJ1n6yh9gXN1Hwc9hkwZepzpHZg== X-Received: by 2002:a05:6a20:835d:b0:b8:90fb:4f44 with SMTP id z29-20020a056a20835d00b000b890fb4f44mr3845413pzc.21.1673995080437; Tue, 17 Jan 2023 14:38:00 -0800 (PST) Received: from ?IPV6:2601:681:8600:13d0::f0a? ([2601:681:8600:13d0::f0a]) by smtp.gmail.com with ESMTPSA id b126-20020a62cf84000000b00574e84ed847sm10475833pfg.24.2023.01.17.14.37.59 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 17 Jan 2023 14:37:59 -0800 (PST) Message-ID: Date: Tue, 17 Jan 2023 15:37:58 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.5.1 Subject: Re: [PATCH 1/1] [fwprop]: Add the support of forwarding the vec_duplicate rtx Content-Language: en-US To: gcc-patches@gcc.gnu.org References: <20230113094236.77805-1-lehua.ding@rivai.ai> From: Jeff Law In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-2.5 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 1/17/23 09:00, Richard Sandiford via Gcc-patches wrote: > > But the idea of the fwprop change looks OK to me in principle. > What we have now seems conservative, based on heuristics that > haven't been updated in a long time. So relaxing them a bit seems > like a good idea. IIRC Jeff had another case in which the current > heuristics were too strict. Two actually, though neither is relevant to this particular problem. Jeff