From patchwork Thu Jun 15 09:50:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Filip Kastl X-Patchwork-Id: 71168 Return-Path: X-Original-To: patchwork@sourceware.org Delivered-To: patchwork@sourceware.org Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 6632B3858298 for ; Thu, 15 Jun 2023 09:51:29 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 6632B3858298 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1686822689; bh=+tx+GDHjxkxNNP1MnTlzhab/Wg+ce75vyO/TJTlldNI=; h=To:Cc:Subject:Date:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From:Reply-To:From; b=kDRmeph9Hvq8KW2reOyOzpvz0+dnqzVJ9y513CVFw9RKxHTOQla9ZnNKfblMQwnJI jVb1MDspB05AXYIL02WgeGLq7MlsQvdSfzEfoIYlJ6NLBlGm80d3dplwBw6p+/S335 p/hhTMKkVHYiy7WX6twoF/9lgz+7DHDTRnLrmWzg= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from mail-ej1-x636.google.com (mail-ej1-x636.google.com [IPv6:2a00:1450:4864:20::636]) by sourceware.org (Postfix) with ESMTPS id 9F4413857014 for ; Thu, 15 Jun 2023 09:51:00 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 9F4413857014 Received: by mail-ej1-x636.google.com with SMTP id a640c23a62f3a-982b1a18daeso41100766b.2 for ; Thu, 15 Jun 2023 02:51:00 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686822659; x=1689414659; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=+tx+GDHjxkxNNP1MnTlzhab/Wg+ce75vyO/TJTlldNI=; b=NnplBaHzOvM6/ygsS1pgXsoeyY/JuVbltZ9juu22gso1eT9BES4pnvuWm3OVNSVvBp BaE33Bb1AFdA93w0B0m8Vn3OXRZx4l56QMtruSq1AEsuND2N8KMoNEsnAnWP6DlekgtJ eQ8XxJKcg9hGS27Vb+i0hgnmiw0S4S4QViNy1EJMFT7oZNb/L1BHyXsnpcOwsU25wO6X 0eqbkp0WZ/PF85NXcnGPOU/LfiA5jMQB/JcMnul0tq3r9ZniwtEjl6RswEQTO8z0c2YM 4G+NKiecGflh5RmmnsRwmJtWMDprfYW+T/xt6o4egLZDDqhAjQVbZT2rzbRZbe3oKH0U CbAQ== X-Gm-Message-State: AC+VfDzs32Lo6hhwmEZVx5xgnjiDYGdsxou3PXXYYA3AN8R9sUlHraXm pOx3o2h7cJaQh4CuKzxLkoX9+WamByw= X-Google-Smtp-Source: ACHHUZ6fsIICxHALycCyDMq9DTBr/RQGKOnz4b1ca6iRVZNoGsuR/fONubBNi2ZbGFVkzFUNsA5k9Q== X-Received: by 2002:a17:907:d2a:b0:97d:cda7:f0c4 with SMTP id gn42-20020a1709070d2a00b0097dcda7f0c4mr17853224ejc.61.1686822659104; Thu, 15 Jun 2023 02:50:59 -0700 (PDT) Received: from ntb03-Void.cuni.cz (koleje-wifi-0041.koleje.cuni.cz. [78.128.191.41]) by smtp.gmail.com with ESMTPSA id oq19-20020a170906cc9300b00977e0bcff1esm9241695ejb.10.2023.06.15.02.50.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 15 Jun 2023 02:50:58 -0700 (PDT) To: gcc-patches@gcc.gnu.org Cc: Filip Kastl Subject: [PATCH] value-prof.cc: Correct edge prob calculation. Date: Thu, 15 Jun 2023 11:50:52 +0200 Message-Id: <20230615095052.13119-1-filip.kastl@gmail.com> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 X-Spam-Status: No, score=-12.8 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, 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 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-Patchwork-Original-From: Filip Kastl via Gcc-patches From: Filip Kastl Reply-To: Filip Kastl Errors-To: gcc-patches-bounces+patchwork=sourceware.org@gcc.gnu.org Sender: "Gcc-patches" The mod-subtract optimization with ncounts==1 produced incorrect edge probabilities due to incorrect conditional probability calculation. This patch fixes the calculation. gcc/ChangeLog: * value-prof.cc (gimple_mod_subtract_transform): Correct edge prob calculation. Signed-off-by: Filip Kastl --- gcc/value-prof.cc | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/gcc/value-prof.cc b/gcc/value-prof.cc index f40e58ac4f2..580d6dd648d 100644 --- a/gcc/value-prof.cc +++ b/gcc/value-prof.cc @@ -1186,7 +1186,11 @@ gimple_mod_subtract_transform (gimple_stmt_iterator *si) if (all > 0) { prob1 = profile_probability::probability_in_gcov_type (count1, all); - prob2 = profile_probability::probability_in_gcov_type (count2, all); + if (all == count1) + prob2 = profile_probability::even (); + else + prob2 = profile_probability::probability_in_gcov_type (count2, all - + count1); } else {