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Subject: [Bug c++/96994] Missing code from consteval constructor initializing
 const variable
Date: Mon, 05 Oct 2020 08:25:00 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96994

--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:2513dad670c00dd9db3a85be348f6f4020b18b81

commit r10-8853-g2513dad670c00dd9db3a85be348f6f4020b18b81
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Thu Oct 1 11:18:35 2020 +0200

    c++: Fix up default initialization with consteval default ctor [PR96994]

    > > The following testcase is miscompiled (in particular the a and i
    > > initialization).  The problem is that build_special_member_call due=
 to
    > > the immediate constructors (but not evaluated in constant expression
mode)
    > > doesn't create a CALL_EXPR, but returns a TARGET_EXPR with CONSTRUC=
TOR
    > > as the initializer for it,
    >
    > That seems like the bug; at the end of build_over_call, after you
    >
    > >        call =3D cxx_constant_value (call, obj_arg);
    >
    > You need to build an INIT_EXPR if obj_arg isn't a dummy.

    That works.  obj_arg is NULL if it is a dummy from the earlier code.

    2020-10-01  Jakub Jelinek  <jakub@redhat.com>

            PR c++/96994
            * call.c (build_over_call): If obj_arg is non-NULL, return
INIT_EXPR
            setting obj_arg to call.

            * g++.dg/cpp2a/consteval18.C: New test.

    (cherry picked from commit 56da736cc6ced0f1c339744321a14ae569db8606)=