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=-10.8 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,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 5A37FC5519F for ; Sun, 22 Nov 2020 15:27:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 114E720773 for ; Sun, 22 Nov 2020 15:27:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="LeQRRqxO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727382AbgKVP1g (ORCPT ); Sun, 22 Nov 2020 10:27:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59948 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727317AbgKVP1g (ORCPT ); Sun, 22 Nov 2020 10:27:36 -0500 Received: from mail-wm1-x341.google.com (mail-wm1-x341.google.com [IPv6:2a00:1450:4864:20::341]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 259A8C0613CF for ; Sun, 22 Nov 2020 07:27:36 -0800 (PST) Received: by mail-wm1-x341.google.com with SMTP id d142so15517656wmd.4 for ; Sun, 22 Nov 2020 07:27:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=xiCHleSLrSElRB4xnH1N7hiOIs8yWxgiRxTbCdckcic=; b=LeQRRqxO5okwdq5Pr1EEdpeLimfdY49o7xwZCwJYvaarCJjUSZIZypw0p3Zp0yUZTw EvBN3UT9Ni5e7OKU8xtkwKbuqmq96FF5pnCE7mhYLUXGPRmst+tN+hYwCa89Mee9iQIW cUVeIUdx84Yv9loMguTf/YDLkXiMjXKAithjinNg8hDsdPKm0MhovqJ/OjtS+HqkuyF7 XPvw6p767FjHfnmOnv1IdBCV2aFS1gFjpbyevjm+IZxtopWbvPpuRsmu9Xeyhu3UmWHZ HgRQSz7e9oYMsbmr71g0f4CWK2DMUYshMkAZJwLbeonuDQc4ZdzwkOYcav5Ni3m5bpIL 9iIQ== 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:mime-version :content-transfer-encoding; bh=xiCHleSLrSElRB4xnH1N7hiOIs8yWxgiRxTbCdckcic=; b=Q8ppkSgTVWJgtDq3HOuVCpCDWZmxoOgYB0C1RwCfjw9sc6k8eYCzRYeBlB+QxO8Mey vqUO+2mzwdmgZvcC7cfWEjxEecNmJO7y9ABjMs3fc2bO/l7KrfSoDXvA7lQqzdYjsxEX ST/AscbQrMrzSC+3kXb2BNhHZCBqDmHhXb26JEfOk9tzTuVerrSHbvycp6nOC8CcB8/7 2xr6EHgYg6j2nF6vK8UIMfx1ywyvAFvuDwJ6BpKKpFoP+5NSwyYTa3f1YS3nQ+ne6EyO RuO87rYlMgftcorQnBb4L+cvCrLEEnwwxQnDeav3Rx2Kg6yVK0vsyM/b/EJM481xwkh8 yMZQ== X-Gm-Message-State: AOAM5337e1fqU9WfVEYcuxT6zZqwUWWS4QQQfUmIZxl5ftm30e9Ekfln vsWmKQ4+twQvHZfVJXSK5oi4xmQt2uE= X-Google-Smtp-Source: ABdhPJx4ZtqM+FyYdd7JG0l/rt0zq6M0EXy3Nxsx5wwVHAKKomv98zRepKE73Ni3GjyyUlmsCu8a1Q== X-Received: by 2002:a7b:ca47:: with SMTP id m7mr19277543wml.158.1606058854513; Sun, 22 Nov 2020 07:27:34 -0800 (PST) Received: from localhost.localdomain ([2a02:a03f:b7fe:f700:b0e1:b041:18e2:46cf]) by smtp.gmail.com with ESMTPSA id k1sm13712265wrp.23.2020.11.22.07.27.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 22 Nov 2020 07:27:33 -0800 (PST) From: Luc Van Oostenryck To: linux-sparse@vger.kernel.org Cc: Luc Van Oostenryck Subject: [PATCH 0/7] simplify logical negation Date: Sun, 22 Nov 2020 16:27:24 +0100 Message-Id: <20201122152731.10994-1-luc.vanoostenryck@gmail.com> X-Mailer: git-send-email 2.29.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-sparse@vger.kernel.org This series contains simplifications for tautologies and contradictions involving logical negation, like (~x & x) or ((x > y) | (x <= y)). As a bonus (but needed for these simplifications), now PSEUDO_REGs and PSEUDO_ARGs are also taken in account when checking if operands are in canonical order, which creates a few CSE opportunities of its own. Luc Van Oostenryck (7): not: add testcases for canonicalization & simplification of negations canon: put PSEUDO_ARGs in canonical order too canon: put PSEUDO_REGs in canonical order too canon: simplify calculation of canonical order opcode: add helpers opcode_negate() & opcode_swap() not: simplify (~x {&,|,^} x) --> {0,~0,~0} not: simplify ((x cmp y) {&,|,^} (x !cmp y)) --> {0,1,1} linearize.h | 4 +- opcode.h | 10 +++ simplify.c | 118 +++++++++++++++++++++++++--- validation/linear/pointer-arith32.c | 12 +-- validation/linear/pointer-arith64.c | 10 +-- validation/optim/canonical-arg.c | 20 +++++ validation/optim/canonical-not.c | 9 +++ validation/optim/cse-arg01.c | 9 +++ validation/optim/cse-not01.c | 11 +++ validation/optim/cse-not02.c | 11 +++ validation/optim/cse-reg01.c | 9 +++ 11 files changed, 200 insertions(+), 23 deletions(-) create mode 100644 validation/optim/canonical-arg.c create mode 100644 validation/optim/canonical-not.c create mode 100644 validation/optim/cse-arg01.c create mode 100644 validation/optim/cse-not01.c create mode 100644 validation/optim/cse-not02.c create mode 100644 validation/optim/cse-reg01.c -- 2.29.2