From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 10B2EC41604 for ; Tue, 20 Oct 2020 21:10:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A959E2237B for ; Tue, 20 Oct 2020 21:10:44 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="BitYzZB3" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2438669AbgJTVKo (ORCPT ); Tue, 20 Oct 2020 17:10:44 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45994 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2438680AbgJTVKo (ORCPT ); Tue, 20 Oct 2020 17:10:44 -0400 Received: from mail-ej1-x644.google.com (mail-ej1-x644.google.com [IPv6:2a00:1450:4864:20::644]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 978FAC0613CE for ; Tue, 20 Oct 2020 14:10:42 -0700 (PDT) Received: by mail-ej1-x644.google.com with SMTP id h24so4835549ejg.9 for ; Tue, 20 Oct 2020 14:10:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=daEENoVXtJCtGpSewHDuWwUYs9cRkwFb1HtSCPa8Izo=; b=BitYzZB31kIo8RJBpCeuTeNNxQBl+rxQQ9wjPfXATAHaEeYu6Jkyro0rBq+lkrp7pB e1FFy2esWgvAa0q1qcdggsAXvoX1nKH8X+VUeu558R5ElAirIom4+uHC9xZrLbi/Napj 3BjZixftPLehA896+uLkrg2Tt3z3ECq4X/C5ApJ38Xn8I/H3Baf2MqTSn8berYpRQKAN PwQ7mk0cvdDKm06rjZvfkdWI4lj+8c32No9ZjpvZnFEVjvviOiDTDkRa9uYLOOS651U9 2yyz1eTVdguVnjqeJDFja+yfVE3wxM9mvgI/VM99ldZKkejCui/2k0WLS2/Vqw8mk4ym UPZQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=daEENoVXtJCtGpSewHDuWwUYs9cRkwFb1HtSCPa8Izo=; b=nZhMhgueeRB8ePwiLXl06Ya5ropA7isjGUNSSZ9QwWUGMHpJvIdFhME/+AZX64ZK6w kJTLgD7zfQ5bLLrsTNWewjMzrS9dNTierD2om9NawkESR0MpG92S2yc0gUwD+u1or4z3 66MbTUKrjsiAEa/TCsq6n3dZqE3PnSKUzfe6eGFjf6VG0feQkEhnz65wdbYx5nTLsE5Z Pt//3iJKEDAN3wVVtdWNUbgM0leH6P7zk3obKv2pCzSmS7PLMi3pX8NOeqDgNTjCRQVf 8kN3q9czVXQGvlM7QrW/wbahzi6gd1FH6wAUTPS4oS8QeZiQg5RFIhMANgddPG5M3iZs attQ== X-Gm-Message-State: AOAM533ahYA0kx2saOY1/zTVrPfKkanvNIh5slv4OLObFb2uvojdk7dX s0fUmGGz2wtiXmgTXsaMDRjqUbWBMlM= X-Google-Smtp-Source: ABdhPJwwTFdatOEEoi/zsl8WbTiTtXEwMBh9wRvM2iZdfgYxkYuPS2oAvj6HtrSJMkDwS040C2TKWg== X-Received: by 2002:a17:906:b783:: with SMTP id dt3mr97910ejb.534.1603228241118; Tue, 20 Oct 2020 14:10:41 -0700 (PDT) Received: from localhost.localdomain ([2a02:a03f:b7fe:f700:85fe:66cb:a92b:c664]) by smtp.gmail.com with ESMTPSA id d12sm4012848ejt.105.2020.10.20.14.10.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 20 Oct 2020 14:10:40 -0700 (PDT) From: Luc Van Oostenryck To: linux-sparse@vger.kernel.org Cc: Luc Van Oostenryck Subject: [PATCH 19/22] sub: simplify x - (x + y) --> -y Date: Tue, 20 Oct 2020 23:10:18 +0200 Message-Id: <20201020211021.82394-20-luc.vanoostenryck@gmail.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201020211021.82394-1-luc.vanoostenryck@gmail.com> References: <20201020211021.82394-1-luc.vanoostenryck@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-sparse@vger.kernel.org Signed-off-by: Luc Van Oostenryck --- simplify.c | 4 ++++ validation/optim/simplify-same-subl-add.c | 1 - 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/simplify.c b/simplify.c index 08b706ca8f41..48bf48d29f9a 100644 --- a/simplify.c +++ b/simplify.c @@ -1396,6 +1396,10 @@ static int simplify_sub(struct instruction *insn) } switch (DEF_OPCODE(def, src2)) { + case OP_ADD: + if (src1 == def->src1) // x - (x + z) --> -z + return replace_with_unop(insn, OP_NEG, def->src2); + break; case OP_NEG: // (x - -y) --> (x + y) insn->opcode = OP_ADD; return replace_pseudo(insn, &insn->src2, def->src); diff --git a/validation/optim/simplify-same-subl-add.c b/validation/optim/simplify-same-subl-add.c index dbc0fe97f126..e7ae08092556 100644 --- a/validation/optim/simplify-same-subl-add.c +++ b/validation/optim/simplify-same-subl-add.c @@ -3,7 +3,6 @@ int subl_add(int x, int y) { return x - (x + y); } /* * check-name: simplify-same-subl-add * check-command: test-linearize -Wno-decl $file - * check-known-to-fail * * check-output-ignore * check-output-contains: neg\\..* %arg2 -- 2.28.0