From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by sourceware.org (Postfix) with ESMTPS id BDFC13858D33 for ; Wed, 25 Oct 2023 13:52:08 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org BDFC13858D33 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=gmail.com ARC-Filter: OpenARC Filter v1.0.0 sourceware.org BDFC13858D33 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=2607:f8b0:4864:20::62c ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1698241930; cv=none; b=bZ5jteu1SnFBaVC3BJulOd6/EMlkT++JfupSv4w9fpAbz7gB2qtWxyXKx0maPNRu7y0JEvUheQMiqieMKnje7066v4cAjRSreRIE33s/9XdjLud/Hncaedvtk5iv4hXyKP2jaMe8Bt4Hl3QnyXroxu6fiMrovC2kN2FfvxwGH/o= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1698241930; c=relaxed/simple; bh=zECnuaYUqYStA9xqWrfJ1S9lt2/N9SkajXqmBg9epxg=; h=DKIM-Signature:Message-ID:Date:MIME-Version:Subject:To:From; b=u8YhY0wAzeC/blBmMnOOfKp4r4tiPOR7KKc9Lc01Ip17rkEWl1q4bxni1sB/QwwY5G1VBqFGywPAQbHDDOe95qp4UwVRAAetUTx6H9y30u/kQlalTYH6t47hovlvtiNgDd7+qXtQrJhcEnAC83JiZsP5pDCt2GpOBDSTD6tY8Mo= ARC-Authentication-Results: i=1; server2.sourceware.org Received: by mail-pl1-x62c.google.com with SMTP id d9443c01a7336-1ca052ec63bso49474145ad.1 for ; Wed, 25 Oct 2023 06:52:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1698241927; x=1698846727; darn=gcc.gnu.org; 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=uRbfYdVHhcKzjxG9nosGmGWGl/ityH/lmDudvmbqs1g=; b=AoZhP9/i4kjzEUfUPVses14QCxNuCTjrsuwagN6mcfZpL0XlcrW1pTdGzaVL3yJPSk vhBYjz+AgHbiU76McBqu3nVnZW0lSlfXGggUaxKalHtrlK9nGtXL2yQnJznRoy2q9uDD fdSLt6MHc96BtXMZh91AqAuxttljlDRUOeP2RTH6o3iMfopJLEPPQ8pkjMyCH5C8TcVD YVtvetCcteUDmWTjN+Q+kqmJzkNgML/ChvJfeyyDZa9cDNPdWJatlPNBbGIuUd0s8sQw BAR5B0UW1ddfLoS14SXDyf/m8b9OMCgh6UgtLunu5KAZ7vPMiV46L2rQyHo5I4hdA7Zc DzgA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698241927; x=1698846727; 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=uRbfYdVHhcKzjxG9nosGmGWGl/ityH/lmDudvmbqs1g=; b=Iha0xzB2x8DG0oTYxcsPsYdADS+ff96vkNHPNArMHy0uvmkvqSMjqvcXyEFPfFdNxJ MBGxybYKWogjpTrC7B4o8AyOpA2guzhFaDsJdHEU6/gU9TDo9A5aeR2SUHCtRRXORfOf blCQqy4ZI7Xx6feG45gscGGb5PpwiJOLK1FUQ3XzggfCGgad/jVgH9RhSyVVVxmlgz94 tDZ+Pg7nKlAMz0ayOgd50gA4i/RVxL2dGx2Qi5wq+CgzwNHhHzK7EcHei2+Y/uzljSMh 78Dmnz0PiKGQ6I3c8OS3dRUofZE3hjyoDc/a66mBYXjnbFt3XAvGClP2e9/xx8gPLwLv OR1w== X-Gm-Message-State: AOJu0Yw47ysogHVZtG4iBqFPieu6s0RBc3NefDnBCsJf0j0MyaUn6vza cN3yB+j3zNs/W2iTjN9Dq0E= X-Google-Smtp-Source: AGHT+IFnSOUuHEnf2aoe3JA2HJRcs93YXhjuLVWJa3N5cKGq/DSw3YdkiWRG5hlGwL9ThMxauWuFGg== X-Received: by 2002:a17:903:27d0:b0:1ca:7a4c:8356 with SMTP id km16-20020a17090327d000b001ca7a4c8356mr14793012plb.27.1698241927236; Wed, 25 Oct 2023 06:52:07 -0700 (PDT) Received: from [172.31.0.109] ([136.36.130.248]) by smtp.gmail.com with ESMTPSA id p11-20020a170902eacb00b001c9ad9470a5sm9219994pld.253.2023.10.25.06.52.04 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 25 Oct 2023 06:52:06 -0700 (PDT) Message-ID: <7c049504-b8f7-4f03-aa54-5015c74d1bbe@gmail.com> Date: Wed, 25 Oct 2023 07:52:01 -0600 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC] RISC-V: elide sign extend when expanding cmp_and_jump Content-Language: en-US To: Robin Dapp , Vineet Gupta , gcc-patches@gcc.gnu.org Cc: gnu-toolchain@rivosinc.com References: <20231025050155.627837-1-vineetg@rivosinc.com> <7fe582bc-d259-4d2a-bedf-4e1a334d7fc3@gmail.com> <33283a26-0271-41c3-8934-159658eab352@gmail.com> <20af64b0-2c3b-426e-adc0-10baac70e7f7@gmail.com> From: Jeff Law In-Reply-To: <20af64b0-2c3b-426e-adc0-10baac70e7f7@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-2.4 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 10/25/23 07:47, Robin Dapp wrote: > >> Well, it doesn't seem like there's a lot of difference between doing >> it in the generic expander bits vs target expander bits -- the former >> just calls into the latter for the most part. Thus if the >> subreg-promoted state is available in the target expander, I'd expect >> it to be available in the generic expander. > > Ah, sorry I meant in the [sign|zero]extend expanders rather than the > compare expanders in order to catch promoted subregs from other origins > as well. Maybe that doesn't work, though? That's a *really* interesting idea. Interested in playing around a bit with that Vineet? jeff