From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf1-x133.google.com (mail-lf1-x133.google.com [IPv6:2a00:1450:4864:20::133]) by sourceware.org (Postfix) with ESMTPS id C5EB13858D33 for ; Sun, 3 Sep 2023 23:31:06 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org C5EB13858D33 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-lf1-x133.google.com with SMTP id 2adb3069b0e04-50078eba7afso1436933e87.0 for ; Sun, 03 Sep 2023 16:31:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1693783865; x=1694388665; darn=gcc.gnu.org; h=mime-version:references:message-id:in-reply-to:subject:cc:to:date :from:from:to:cc:subject:date:message-id:reply-to; bh=oUEwRnH3fYo9gKV99SHVPB1GSpG4fQDsiUzgQHec4WM=; b=l6+ZQbjouV4mfGVlCVUW/CwcyZUBuIKtJfJurXKbGhYHr/Uv9jPMZ5SoE/eJh/JD8o FGqoRCYIIz8go8xYQA3lNLsajUul007FZWLh1wGbobshZKfuPBhoZczzy6y4UrZ6O6AV sO63N4tpJnZFZtvqL17RbiZ1DkZbBT6hKM0f2bcsZFCaQgxYV4ood8Epy2sagAH5pzXu wm5Ow4L7OdSRHhq7nauQUw+Hm03GigOoPthR1QGAkN0jl9Zzt1NoRufZVdiC12qroHT/ LlPgrEvq1l6xLVYvm0gLLqveLgKM75GlbY4j9VvmAX67rLZ8bORuGlOaldzwf5JhKnS7 fIyA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1693783865; x=1694388665; h=mime-version:references:message-id:in-reply-to:subject:cc:to:date :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=oUEwRnH3fYo9gKV99SHVPB1GSpG4fQDsiUzgQHec4WM=; b=AJ+Gs+HLhtNT/0gykFAA5LqzSSOBkzdSXEW/o2b952IADCx5GWDiiVr9jbMYVwCiba CP9S1klCIGdBmZiDD15zJZxmuQyscddjlc2Q1cC6D68G36SSmaXv8yIWqezwnP2EMIWg ZCXAJqqaQsG/QxnwAISc/yVXVqoZ1bJ6sUXZ/lQYqz45peiIVvz6q/evwYT6FRxz8xgX 8OFutXb4cTUr/in1Bya7tK0v5lQIQaGR97TrClXN8ZcwbsLi1fZ3cnBw68R5MrFS9V6e RsWfljzEPfIHyhE3V1e/kxOXBzKaAdgkkrX1qbBqm87DAPNolhSvCyNCV5TXka8N8NB1 tfYg== X-Gm-Message-State: AOJu0YxYbkqNlCChvGBvagvN4RLI1/HHu2j7rWfx0L2TdHJWjlZteYlr WoQ0mphBg31fDI7xk2eWktU= X-Google-Smtp-Source: AGHT+IES9RKTgQF2kkdtT10+0v3A/mn26cn8KRaXeZbSvUwDKepuXu+jwXbZH8g9c/9PS62KNYRSjA== X-Received: by 2002:ac2:592a:0:b0:500:8146:9ebc with SMTP id v10-20020ac2592a000000b0050081469ebcmr5392857lfi.47.1693783864525; Sun, 03 Sep 2023 16:31:04 -0700 (PDT) Received: from [192.168.0.16] (c83-251-162-118.bredband.tele2.se. [83.251.162.118]) by smtp.gmail.com with ESMTPSA id q9-20020a19a409000000b004fb8a2b9485sm1449812lfc.248.2023.09.03.16.31.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 03 Sep 2023 16:31:03 -0700 (PDT) From: Krister Walfridsson X-Google-Original-From: Krister Walfridsson Date: Sun, 3 Sep 2023 23:30:42 +0000 (UTC) To: Richard Biener cc: Andrew MacLeod , gcc@gcc.gnu.org Subject: Re: CLZ when CLZ_DEFINED_VALUE_AT_ZERO is false In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,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 Fri, 1 Sep 2023, Richard Biener wrote: > The value of .CLZ (0) is undefined then. I belive your analysis is correct in > that both 63 - _35 might overflow and that dom3 (thus ranger) mis-computes > the range for _35. I wonder why we don't elide _36 ? _31 : 1 with that info > (possibly no range-op for .CLZ?), of course it would be wrong to do so. > > Can you open a bugreport please? PR 111280. /Krister