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 B99243858C62; Thu, 19 Jan 2023 16:51:04 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org B99243858C62
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1674147064;
	bh=i7Jne8364AeQgBiVtQwLEyc4f8uL4EbudaU6VlxSToo=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=ZuIAIIVZe5O8H5lnCJnO4hDun/f19uz+4fZNCseMoKthgKovRJ6q1LWwVAjKIpiRg
	 AJHZUe3o/CT6slq5fYLDnvtMpzLa7Q5wX0Cbv23dJGR4p50ZT9FZfA9YZlxHTsJmPO
	 qtHU7eDelqezJ3+h5ixFin+UJbL3x3y/La5QHJls=
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/53932] [10/11/12/13 Regression] C++ reference variable to
 member of anonymous union in global is error
Date: Thu, 19 Jan 2023 16:51:04 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 4.3.4
X-Bugzilla-Keywords: ice-on-valid-code, link-failure, wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jakub 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: 10.5
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-53932-4-Z4Bhbk5FK8@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-53932-4@http.gcc.gnu.org/bugzilla/>
References: <bug-53932-4@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
List-Id: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D53932

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
So, the problem is that build_anon_union_vars builds artificial variables f=
or
the anon union members and they those VAR_DECLs have DECL_VALUE_EXPR set to=
 the
D.2763.i and similar COMPONENT_REFs.  But VAR_DECLs with DECL_VALUE_EXPRs a=
re
only actually replaced with those DECL_VALUE_EXPR expressions during
gimplification or regimplification (which explains why it works fine inside=
 of
code in functions or global constructors).
Nothing replaces them in DECL_INITIAL expressions of statically initialized
vars.=