From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by sourceware.org (Postfix) with ESMTPS id B52AE3842435 for ; Thu, 31 Mar 2022 07:19:15 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org B52AE3842435 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id A3A6B1F869 for ; Thu, 31 Mar 2022 07:19:14 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 8EDCE139C2 for ; Thu, 31 Mar 2022 07:19:14 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id Ok/KIfJVRWJFYAAAMHmgww (envelope-from ) for ; Thu, 31 Mar 2022 07:19:14 +0000 Date: Thu, 31 Mar 2022 09:19:14 +0200 (CEST) From: Richard Biener To: gcc-patches@gcc.gnu.org Subject: [PATCH] rtl-optimization/105091 - wrong DSE with missed TREE_ADDRESSABLE MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Message-Id: <20220331071914.8EDCE139C2@imap2.suse-dmz.suse.de> X-Spam-Status: No, score=-11.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.4 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 31 Mar 2022 07:19:17 -0000 When expanding an aggregate copy into a memcpy call RTL expansion uses mark_addressable to ensure the base object is addressable but that function doesn't handle TARGET_MEM_REF bases. Fixed as follows. Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed. 2022-03-31 Richard Biener PR rtl-optimization/105091 * gimple-expr.cc (mark_addressable): Handle TARGET_MEM_REF bases. --- gcc/gimple-expr.cc | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/gcc/gimple-expr.cc b/gcc/gimple-expr.cc index f9a650b5daf..5faaf43eaf5 100644 --- a/gcc/gimple-expr.cc +++ b/gcc/gimple-expr.cc @@ -910,7 +910,8 @@ mark_addressable (tree x) x = TREE_OPERAND (x, 0); while (handled_component_p (x)) x = TREE_OPERAND (x, 0); - if (TREE_CODE (x) == MEM_REF + if ((TREE_CODE (x) == MEM_REF + || TREE_CODE (x) == TARGET_MEM_REF) && TREE_CODE (TREE_OPERAND (x, 0)) == ADDR_EXPR) x = TREE_OPERAND (TREE_OPERAND (x, 0), 0); if (!VAR_P (x) -- 2.34.1