From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pj1-x1035.google.com (mail-pj1-x1035.google.com [IPv6:2607:f8b0:4864:20::1035]) by sourceware.org (Postfix) with ESMTPS id 588D13858D32 for ; Mon, 15 May 2023 02:39:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 588D13858D32 Authentication-Results: sourceware.org; dmarc=pass (p=reject dis=none) header.from=sifive.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=sifive.com Received: by mail-pj1-x1035.google.com with SMTP id 98e67ed59e1d1-24e09b4153eso8316206a91.2 for ; Sun, 14 May 2023 19:39:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sifive.com; s=google; t=1684118342; x=1686710342; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=U41YEn3Fva+4J6EjuMdlUj5p46+j11SWU1OK0Qjb+Ok=; b=Pz3ISIO/w59v/F5JMKkzqdrpvG89VXk8KxY10OVhAbO0WOqRg836XPgNHtMRo+4Ewh n7CCvBxwmmvBVKyjVTqa2kgRXdlnb7/IoRMiS1pPEP81J3UHdyIupzxatTH29dUVWJMO l3C8zud9GDjMFlZ6M6A3nvoP6+5P2YyFFnx+txSFm3IabocbdPppDL38L4CQcE+LviXN QJU+HQm+y70v1G+fBoYolFX6Oj9I60vLFtVFuetreIxhYVW2it4zMFgqGBkEd09vx65X 6hHunrZ6cW6MsWCbf5EYjQ9Vf1jLBfM54oE0NWVgEytb6E5D809W2Lo8cFBDeUaj/Abe mgGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1684118342; x=1686710342; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=U41YEn3Fva+4J6EjuMdlUj5p46+j11SWU1OK0Qjb+Ok=; b=OQmMY2+FoslRIVx75yvH8gitkFpmKCvsHHRgwYE4f8laRbW/dF4aghldnstDTYWSR8 B2aJFlPpV3Tm78qGWPTU4s+sYOcwxD3ocSFd+utjcgxN9dOabhnXLsfykxSTJ+Cpc94d gwNanbCRHPrD8cmU5tlELgX+GmVwPcQDTOmEZEkYWzW5SHRagzTQHHFiz/bSUjiIpdxL 358KTbebE9WlOaPI/Loj3M0z/CBrg4eq6jbfb6FS2XQFMo/ojFaN2TtprjEiyfnnh42G S4j+hrcGqzQA33xP9L1KP7/NwJp7Gwy+bASd9fjsLDVuFrELx6EpdSNgKMNy3M7zkF7H prgg== X-Gm-Message-State: AC+VfDyCGZCBgVxsL/LyP/gFWXF6smdkLd2ErfwAR+YSYFje8+E2XwtF H6wwK++yghs/v9JTQotyCcqKqH7beD1cgjNnqpWI4Q== X-Google-Smtp-Source: ACHHUZ67y6/V0LSW09Fu6n1WpLTBU8JrM9d2oaLUWa3+PCndhgCWOegY4yFmSLcSyMURjB1SGNB7eWxB+2YZqGLlcbM= X-Received: by 2002:a17:90b:33ce:b0:23d:1143:c664 with SMTP id lk14-20020a17090b33ce00b0023d1143c664mr31969191pjb.31.1684118342239; Sun, 14 May 2023 19:39:02 -0700 (PDT) MIME-Version: 1.0 References: <20230513114421.196081-1-juzhe.zhong@rivai.ai> <9749BBE19D80DC01+2023051508355391896637@rivai.ai> In-Reply-To: <9749BBE19D80DC01+2023051508355391896637@rivai.ai> From: Kito Cheng Date: Mon, 15 May 2023 10:38:51 +0800 Message-ID: Subject: Re: [PATCH] RISC-V: Support TARGET_VECTORIZE_PREFERRED_VECTOR_ALIGNMENT to optimize codegen of RVV auto-vectorization To: "juzhe.zhong@rivai.ai" Cc: gcc-patches , palmer , Robin Dapp , jeffreyalaw Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-10.5 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,GIT_PATCH_0,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE 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: > diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc > index de578b5b899..a5776a550b2 100644 > --- a/gcc/config/riscv/riscv.cc > +++ b/gcc/config/riscv/riscv.cc > @@ -7499,6 +7499,24 @@ riscv_preferred_simd_mode (scalar_mode mode) > return word_mode; > } > +/* Implement target hook TARGET_VECTORIZE_PREFERRED_VECTOR_ALIGNMENT. */ > + > +static poly_uint64 > +riscv_vectorize_preferred_vector_alignment (const_tree type) > +{ > + if (riscv_v_ext_vector_mode_p (TYPE_MODE (type))) > + { > + /* If the length of the vector is a fixed power of 2, try to align > + to that length, otherwise don't try to align at all. */ > + HOST_WIDE_INT result; > + if (!GET_MODE_BITSIZE (TYPE_MODE (type)).is_constant (&result) > + || !pow2p_hwi (result)) > + result = TYPE_ALIGN (TREE_TYPE (type)); > + return result; Why we block VLS here and then relaxed by different way in another patch?