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 1561E38717DF; Sat, 10 Dec 2022 03:42:57 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 1561E38717DF
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1670643777;
	bh=MPoA4kH0govRucY+05lQfU55goL622rFaY2KEtMnPQA=;
	h=From:To:Subject:Date:From;
	b=UexUPNNWYoK4kGiqQwCNue+yQbmhdYdlDJUyn+GSO3fQ56TXehUtxj0pGU40lUA7x
	 H/IdtM6/uq2AHNnKsJMpL7fh28yenVSXejWmtgiGKAbmwzUIQ2aHnpxPUYay10Jj6o
	 vyx+n+u96b/905yP185ghz8zC+bUsWIJqMdhqdiU=
From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/108042] New: [10/11/12/13 Regression] weakref on an
 extern decl is incorrectly ignored
Date: Sat, 10 Dec 2022 03:42:55 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Version: 13.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: pinskia 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: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status
 keywords bug_severity priority component assigned_to reporter
 target_milestone
Message-ID: <bug-108042-4@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=3D108042

            Bug ID: 108042
           Summary: [10/11/12/13 Regression] weakref on an extern decl is
                    incorrectly ignored
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: middle-end
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

From:
https://gcc.gnu.org/onlinedocs/gcc-12.2.0/gcc/Common-Function-Attributes.ht=
ml#index-weakref-function-attribute

Without a target given as an argument to weakref or to alias, weakref is
equivalent to weak (in that case the declaration may be extern).

Testcase:
```
void KNOWNNOTOBEAFUNCTION(void) __attribute__((weakref));

int main() {
    if (KNOWNNOTOBEAFUNCTION)
        __builtin_abort();
    else
        return 0;
}
```

This should pass.=