From patchwork Fri Feb 9 10:28:34 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Biener X-Patchwork-Id: 198811 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7300:50ea:b0:106:860b:bbdd with SMTP id r10csp756640dyd; Fri, 9 Feb 2024 02:30:00 -0800 (PST) X-Forwarded-Encrypted: i=3; AJvYcCWeBZr7DQCKZ4faIcpgao8dWPftFgbceZ/WnNQi+VLj20gZpxh2gNoHFxCVSNlQ5NU0E4p7Uyxr7KLF8sxNeBABS2RGaA== X-Google-Smtp-Source: AGHT+IG5Dz6GFdvvB112gIlaBqQTYY39SpN/+8NEa3T+clxY/Papob3TZapI6bBSjy4xNpMrDpyA X-Received: by 2002:a05:620a:5681:b0:785:3887:de18 with SMTP id wg1-20020a05620a568100b007853887de18mr1113669qkn.65.1707474600695; Fri, 09 Feb 2024 02:30:00 -0800 (PST) ARC-Seal: i=2; a=rsa-sha256; t=1707474600; cv=pass; d=google.com; s=arc-20160816; b=BIogWmAGCuCc2IKPyOavUnYon7yw4Fbcsqft5VpPan5iqpH6qLWSa4jAXart4u8A/C hSRTB9p/DvzS5Jlw/sf1ctzz60qZabeZxSmpSlls+LlLMMNPMSbu5XgsMCzIj0S9Ha2I SWodtKnDCm7Ata9GJvFAz2rzaPn2VL6VLaSfjSpPJro4AeY93hsR80XclKQ70uyKg9y/ 5d3N6VZHeat9jLHNufqQG0N/TdRVPtyPzxweMzc76IJLRVbGfvT7USEJVDJ7HeVE1Wid 2IM7iVGEdaBvGI7e/X6WV7iqEIVEj1Ms9LvvJy7vJtpbHHrs/TobjcTeEzY70QHD2kOV 5L6g== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=message-id:errors-to:list-subscribe:list-help:list-post :list-archive:list-unsubscribe:list-id:precedence:mime-version :subject:cc:to:from:date:dkim-signature:dkim-signature :dkim-signature:dkim-signature:arc-filter:dmarc-filter:delivered-to; bh=ZEqoCcxpcR72wj4Eu6zgmDpej9jGH4DlqVWqihg6X2o=; fh=ZGuEvoW8f70Srmu57ROclXZCaoeN6D6cA0dGS0WqzdM=; b=gO4nnr+Rj2ehaX8nZPRTEi5Q5WI+QSnCbaKcZSzdTohmFMrfl4EtLr6swvSPR70JlA M2NWzXjgsmW4vOcGLSTIFt5uGSicFXW2Fcsecjz0s8KNb1AmsWEdYzmFoxP7btDZdr0M e5eUTmB97z4cO67404vneT/qoPXECKQZdge/qd210KBssl9tibG+c0urXwCpX7+f/kfD 9MRy9wO5xXOma1giC9XsKF2bARepTQFq/T0vwwS+cUhjG+eQmrRebw0LuxsvIzQLcKE3 0NoYzde8luVVv9l+qmvx3oWyHkPdfjl0t3jwxymp2EIleYrsK6ox6OCnybdFaLwwEzdA 4Z/A==; dara=google.com ARC-Authentication-Results: i=2; mx.google.com; dkim=pass header.i=@suse.de header.s=susede2_rsa header.b=GeOfCGNB; dkim=neutral (no key) header.i=@suse.de header.s=susede2_ed25519; dkim=pass header.i=@suse.de header.s=susede2_rsa header.b=GeOfCGNB; dkim=neutral (no key) header.i=@suse.de header.s=susede2_ed25519; arc=pass (i=1); spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=suse.de X-Forwarded-Encrypted: i=2; AJvYcCXLSnVgdVbxBcJfJ5HuByTM58GZakCUjf/No2RGEW743HqLjVEWUjD3j9IcFXISDi9byaRRIFg7gFAHAElZVJcwNy2mzA== Received: from server2.sourceware.org (server2.sourceware.org. [8.43.85.97]) by mx.google.com with ESMTPS id l4-20020a05620a210400b0078405cec4fcsi1621872qkl.605.2024.02.09.02.30.00 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 09 Feb 2024 02:30:00 -0800 (PST) Received-SPF: pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 as permitted sender) client-ip=8.43.85.97; Authentication-Results: mx.google.com; dkim=pass header.i=@suse.de header.s=susede2_rsa header.b=GeOfCGNB; dkim=neutral (no key) header.i=@suse.de header.s=susede2_ed25519; dkim=pass header.i=@suse.de header.s=susede2_rsa header.b=GeOfCGNB; dkim=neutral (no key) header.i=@suse.de header.s=susede2_ed25519; arc=pass (i=1); spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=suse.de Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 69E0D385829A for ; Fri, 9 Feb 2024 10:30:00 +0000 (GMT) X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.223.131]) by sourceware.org (Postfix) with ESMTPS id 54B853858C35 for ; Fri, 9 Feb 2024 10:28:35 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 54B853858C35 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=suse.de Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=suse.de ARC-Filter: OpenARC Filter v1.0.0 sourceware.org 54B853858C35 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=195.135.223.131 ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1707474517; cv=none; b=YqmHMVAGWtqiYEs/1erUpT+MCD0Le7buudNQFaYSNgwoQIeEO2GKhqfli93unmU8Nj0wVhSAIVXDf8PiextOY/terahdFWj+nfMZshGZBPdJRhb1jpmH6SASoCGreX3D73SOVMr8Hr9q9BB8bog+Uqqm+q6Ibut2fIIjyvfm4q0= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1707474517; c=relaxed/simple; bh=OqKbkkIddyG9ejXIB2GrKNZsbNd5lQoTXrrKP5J33XQ=; h=DKIM-Signature:DKIM-Signature:DKIM-Signature:DKIM-Signature:Date: From:To:Subject:MIME-Version; b=E8mnl+0Fp9LCqCG9rfpx7DKqXMy06xkwALTiklZjFDcwr/v6G7147rVLh3HBZXyT74HlKoeKI4DMhQzv/jDk17a8ay1Vi1ApSHEHRdAluJUbmGcHB/VkoQddvK2QEaX8LbOumAgKxeNBNMP3mNEHWzQQtwpV/9m9Nc5a2hU1sA4= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from [10.168.4.150] (unknown [10.168.4.150]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 45DF91F7F9; Fri, 9 Feb 2024 10:28:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1707474514; h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version: content-type:content-type; bh=ZEqoCcxpcR72wj4Eu6zgmDpej9jGH4DlqVWqihg6X2o=; b=GeOfCGNB44Dz3mrVWCmgzNNtJ2vM2DIhGXYcoHrw9g+D5JCd9eh3iuv8dsjxsKpRyEjGaE C/DDbK/w9NojFTEbhWuqZAisXg9MNNcKcWA8QtKsBcF5QnXG1wUFycMBYFr8lOr1t+CVQe dHrPCNalilaxot9Knsm6Fh6qMe6Rkxs= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1707474514; h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version: content-type:content-type; bh=ZEqoCcxpcR72wj4Eu6zgmDpej9jGH4DlqVWqihg6X2o=; b=JFVH+Ot7elzlvmX1HIM2sz0LNXsy5SkWrUBWspmJb5jw0TBz22cts2i3llEqHGJilWpT61 +Xy5XcgZz2+RkhDA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1707474514; h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version: content-type:content-type; bh=ZEqoCcxpcR72wj4Eu6zgmDpej9jGH4DlqVWqihg6X2o=; b=GeOfCGNB44Dz3mrVWCmgzNNtJ2vM2DIhGXYcoHrw9g+D5JCd9eh3iuv8dsjxsKpRyEjGaE C/DDbK/w9NojFTEbhWuqZAisXg9MNNcKcWA8QtKsBcF5QnXG1wUFycMBYFr8lOr1t+CVQe dHrPCNalilaxot9Knsm6Fh6qMe6Rkxs= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1707474514; h=from:from:reply-to:date:date:to:to:cc:cc:mime-version:mime-version: content-type:content-type; bh=ZEqoCcxpcR72wj4Eu6zgmDpej9jGH4DlqVWqihg6X2o=; b=JFVH+Ot7elzlvmX1HIM2sz0LNXsy5SkWrUBWspmJb5jw0TBz22cts2i3llEqHGJilWpT61 +Xy5XcgZz2+RkhDA== Date: Fri, 9 Feb 2024 11:28:34 +0100 (CET) From: Richard Biener To: gcc-patches@gcc.gnu.org cc: jeffreyalaw@gmail.com Subject: [PATCH 3/3][RFC] Initial MEM_BASE population MIME-Version: 1.0 Authentication-Results: smtp-out2.suse.de; none X-Spamd-Result: default: False [2.40 / 50.00]; ARC_NA(0.00)[]; FROM_HAS_DN(0.00)[]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; TO_MATCH_ENVRCPT_ALL(0.00)[]; MIME_GOOD(-0.10)[text/plain]; TO_DN_NONE(0.00)[]; MISSING_MID(2.50)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; RCPT_COUNT_TWO(0.00)[2]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCVD_COUNT_ZERO(0.00)[0]; FROM_EQ_ENVFROM(0.00)[]; MIME_TRACE(0.00)[0:+]; FREEMAIL_CC(0.00)[gmail.com]; BAYES_HAM(-0.00)[17.63%] X-Spam-Score: 2.40 X-Spam-Status: No, score=-10.6 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, MISSING_MID, 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 X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Message-Id: <20240209103000.69E0D385829A@sourceware.org> X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1790416886704876064 X-GMAIL-MSGID: 1790416886704876064 The following attempts to set a MEM_BASE from set_mem_attributes_minus_bitpos which is often first called on the expanded base of a complicated memory reference. For now simply preserve a SYMBOL_REF (fancy unwrapping to be implemented). The commented code would transfer some points-to info. * emit-rtl.cc (set_mem_attributes_minus_bitpos): If ref is suitable as base, record it. --- gcc/emit-rtl.cc | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/gcc/emit-rtl.cc b/gcc/emit-rtl.cc index 1cf238d9571..3fb52a87e08 100644 --- a/gcc/emit-rtl.cc +++ b/gcc/emit-rtl.cc @@ -2027,6 +2027,12 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp, if (objectp || TREE_CODE (t) == INDIRECT_REF) attrs.align = MAX (attrs.align, TYPE_ALIGN (type)); + /* We usually expand the base of a complicated ref first, so record any + base value we can determine. ??? Probably should use a simplified + find_base_value here to unwrap a contained SYMBOL_REF. */ + if (GET_CODE (ref) == SYMBOL_REF) + attrs.base = copy_rtx (ref); + /* If the size is known, we can set that. */ tree new_size = TYPE_SIZE_UNIT (type); @@ -2074,6 +2080,24 @@ set_mem_attributes_minus_bitpos (rtx ref, tree t, int objectp, 0)))); else as = TYPE_ADDR_SPACE (TREE_TYPE (base)); + +#if 0 + /* Set the base RTX based on points-to info. */ + if (!attrs.base + && (TREE_CODE (base) == MEM_REF + || TREE_CODE (base) == TARGET_MEM_REF) + && TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME + && SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0))) + { + auto pt = &SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0))->pt; + if (pt->nonlocal + && !pt->anything + && !pt->escaped + && !pt->ipa_escaped + && bitmap_empty_p (pt->vars)) + attrs.base = arg_base_value; + } +#endif } /* If this expression uses it's parent's alias set, mark it such