From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2136) id D43303858004; Tue, 20 Sep 2022 18:22:53 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D43303858004 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1663698173; bh=/yfuHeu6DDTcFJg7TjHt9EbIMF2m5bpwiA++n/ITAAk=; h=From:To:Subject:Date:From; b=td3A7jFAclthKS9TG4z54PuG+g/dG2zwBRaUVdi1Qnkhu3LA2Vx+As3dIawQ/FLeO LE0O95BN7VP3txkFvKKc1RvOogY+1EK5nei6M1d8hMEYCLakzjuRhLb3x07AMaja/P ekfbtnfwu+2ZP7GXn84jn9G+Qa6H4mYqatXF/frs= 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 r13-2742] frange::maybe_isnan() should return FALSE for undefined ranges. X-Act-Checkin: gcc X-Git-Author: Aldy Hernandez X-Git-Refname: refs/heads/master X-Git-Oldrev: 10d6109fe183d984a0377a7afe2854a0d794ebeb X-Git-Newrev: 2438b6a4c8df0d1870881e123cc74cc62b7e58e8 Message-Id: <20220920182253.D43303858004@sourceware.org> Date: Tue, 20 Sep 2022 18:22:53 +0000 (GMT) List-Id: https://gcc.gnu.org/g:2438b6a4c8df0d1870881e123cc74cc62b7e58e8 commit r13-2742-g2438b6a4c8df0d1870881e123cc74cc62b7e58e8 Author: Aldy Hernandez Date: Tue Sep 20 16:09:31 2022 +0200 frange::maybe_isnan() should return FALSE for undefined ranges. Undefined ranges have undefined NAN bits. We can't depend on them, as they may contain garbage. This patch returns false from maybe_isnan() for undefined ranges (the empty set). gcc/ChangeLog: * value-range.h (frange::maybe_isnan): Return false for undefined ranges. Diff: --- gcc/value-range.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/gcc/value-range.h b/gcc/value-range.h index 7d5584a9294..325ed08f290 100644 --- a/gcc/value-range.h +++ b/gcc/value-range.h @@ -1210,6 +1210,8 @@ frange::known_isinf () const inline bool frange::maybe_isnan () const { + if (undefined_p ()) + return false; return m_pos_nan || m_neg_nan; }