From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 299B23858C5E; Wed, 11 Oct 2023 15:36:38 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 299B23858C5E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1697038598; bh=er7lcwu8gs7TU/s2Q9yE69pEkhvwl1NGT9DeRKDsfT0=; h=From:To:Subject:Date:In-Reply-To:References:From; b=x01AaEWXi60wBhk/rcQ7CVJlptfmzGrFxNNpnMAnUfmjZoNZ+hLA8mWhxQ+XEocZH RlmeyEASbWI6zR+dvpPO7AAwwKB7MbVqiu65rJJvCT9cpTZQNaP1n3oX85S2I8M1vm 3uYhMv/5KJaeonpZaA4rEMQEQLJij3TTheHDPOLk= From: "danglin at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug regression/111709] [13/14 Regression] Miscompilation of sysdeps/ieee754/dbl-64/s_fma.c Date: Wed, 11 Oct 2023 15:36:37 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: regression X-Bugzilla-Version: 13.1.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: danglin at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 13.3 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111709 --- Comment #11 from John David Anglin --- This is proving difficult to bisect due to _Floatn issues. I know commit b85e79dce149df68b92ef63ca2a40ff1dfa61396 is good and commit b939a5cc4143908ddda4b85a848c313136ff6e0c is bad. The following glibc change breaks gcc build when BASE-VER changes to 13. https://sourceware.org/git/?p=3Dglibc.git;a=3Dcommitdiff;h=3D3e5760fcb48528= d48deeb60cb885a97bb731160c If I change __GNUC_PREREQ to 13, 1, I hit errors like: In file included from /home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/incl ude/cmath:45, from /home/dave/gnu/gcc/objdir/hppa-linux-gnu/libstdc++-v3/incl ude/complex:44, from ../../../../../gcc/libstdc++-v3/src/c++98/complex_io.cc:25 : /usr/include/math.h:1395:19: error: redefinition of =E2=80=98struct __iseqsig_type=E2=80=99 1395 | template<> struct __iseqsig_type<_Float32> | ^~~~~~~~~~~~~~~~~~~~~~~~ /usr/include/math.h:1366:19: note: previous definition of =E2=80=98struct __iseqsig_type =E2=80=99 1366 | template<> struct __iseqsig_type There are a lot of VRP changes for floats in the range that I haven't been = able to bisect. | ^~~~~~~~~~~~~~~~~~~~~=