From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2136) id 117953854170; Mon, 3 Oct 2022 11:08:44 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 117953854170 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1664795324; bh=m17/I+IxeZtYo8Rjoid4ORIilPo6JyL2yfVAeAjMrUQ=; h=From:To:Subject:Date:From; b=sd9pOCrWpZvaW3lPqObS5T81YfVO0ksnG+Ia8BI3k3ZDZT8Bf3tnoTN7IKhbWMFZA ZpNpcxVm2EwLlJxMaaFpWdxyu/5ljc+AVthrrnyLGi5kET41tOJGErxUWevREzR/7V rv2a0dkNe8vKlYBha/qcq6NRTc3oR20jr2PC/HZg= MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" From: Aldy Hernandez To: gcc-cvs@gcc.gnu.org Subject: [gcc r13-3026] Avoid comparing ranges when sub-ranges is 0. X-Act-Checkin: gcc X-Git-Author: Aldy Hernandez X-Git-Refname: refs/heads/master X-Git-Oldrev: 8e1de8d2db2500d9d4d76c91c3c2dab761566a1a X-Git-Newrev: 7f6f1f521fc12d4dbbdd0766d8fb7121d1e5ea8d Message-Id: <20221003110844.117953854170@sourceware.org> Date: Mon, 3 Oct 2022 11:08:44 +0000 (GMT) List-Id: https://gcc.gnu.org/g:7f6f1f521fc12d4dbbdd0766d8fb7121d1e5ea8d commit r13-3026-g7f6f1f521fc12d4dbbdd0766d8fb7121d1e5ea8d Author: Aldy Hernandez Date: Sat Oct 1 22:31:34 2022 +0200 Avoid comparing ranges when sub-ranges is 0. There is nothing else to compare when the number of sub-ranges is 0. gcc/ChangeLog: * value-range.cc (irange::operator==): Early bail on m_num_ranges equal to 0. Diff: --- gcc/value-range.cc | 3 +++ 1 file changed, 3 insertions(+) diff --git a/gcc/value-range.cc b/gcc/value-range.cc index ddbcdd67633..e1066f4946e 100644 --- a/gcc/value-range.cc +++ b/gcc/value-range.cc @@ -1260,6 +1260,9 @@ irange::operator== (const irange &other) const if (m_num_ranges != other.m_num_ranges) return false; + if (m_num_ranges == 0) + return true; + for (unsigned i = 0; i < m_num_ranges; ++i) { tree lb = tree_lower_bound (i);