From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 440D3386197D; Fri, 18 Jun 2021 10:20:26 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 440D3386197D
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/91488] [9/10/11 Regression] char_traits::length
 causes "inlining failed in call to always_inline" error with -fgnu-tm -O2
 -std=c++17
Date: Fri, 18 Jun 2021 10:20:25 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: libstdc++
X-Bugzilla-Version: 10.0
X-Bugzilla-Keywords: rejects-valid, trans-mem
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 9.5
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-91488-4-rwlCowHS12@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-91488-4@http.gcc.gnu.org/bugzilla/>
References: <bug-91488-4@http.gcc.gnu.org/bugzilla/>
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
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Fri, 18 Jun 2021 10:20:26 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D91488

--- Comment #9 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-11 branch has been updated by Jonathan Wakely
<redi@gcc.gnu.org>:

https://gcc.gnu.org/g:0191c74141cfea8973a6d977ce9944d39f7c4329

commit r11-8616-g0191c74141cfea8973a6d977ce9944d39f7c4329
Author: Jonathan Wakely <jwakely@redhat.com>
Date:   Thu Jun 17 14:11:22 2021 +0100

    libstdc++: Simplify constexpr checks in std::char_traits [PR 91488]

    This removes the 'static' keyword from the helper functions added by
    r8-1294 to detect whether the char_traits member functions can be
    evaluated at compile time. This prevents the "inlining failed" error
    reported in the PR.

    The new testcase from the PR is added to the libitm testsuite, because
    that's where we can be sure it's OK to use the -fgnu-tm option.

    As a drive-by fix, the feature test macros for C++20 P0980R1 support are
    made to depend on whether __cpp_lib_is_constant_evaluated is defined.

    Signed-off-by: Jonathan Wakely <jwakely@redhat.com>

            PR libstdc++/91488

    libstdc++-v3/ChangeLog:

            * include/bits/basic_string.h (__cpp_lib_constexpr_string): Only
            define C++20 value when std::is_constant_evaluated is available.
            * include/bits/char_traits.h (__cpp_lib_constexpr_char_traits):
            Likewise.
            (__constant_string_p, __constant_array_p): Give external
            linkage.
            * include/std/version (__cpp_lib_constexpr_char_traits)
            (__cpp_lib_constexpr_string): Only define C++20 values when
            is_constant_evaluated is available.

    libitm/ChangeLog:

            * testsuite/libitm.c++/libstdc++-pr91488.C: New test.

    (cherry picked from commit b376b1ef38971b84975ad1540bf5d2ae0b924e76)=