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 945EC3858D33; Tue, 20 Feb 2024 16:35:15 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 945EC3858D33
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1708446915;
	bh=i2PmwszaJmYUqhpcTTPkH4MJKAnDjVLFmVbAe5OG5aA=;
	h=From:To:Subject:Date:From;
	b=ovEMJ0Hvy/P0zPg9XICvDaldivP00SWBqYgFrUqQxI0wW7QLDoIY3TaYVEjg+kPVz
	 OgVIg25Mg26+0RxjmNW5DY4fI0miguVou3dBjsREmF96dtq09VtLkUGBzOCbKEMmiJ
	 RiuGjoQLsR/Z1fA4oa4id93V2XOCLuWS/lm+q+jc=
From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/114013] New: [14 Regression] Specializations of var
 templates no longer emitted since r14-8987
Date: Tue, 20 Feb 2024 16:35:15 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jakub 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
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-114013-4@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=3D114013

            Bug ID: 114013
           Summary: [14 Regression] Specializations of var templates no
                    longer emitted since r14-8987
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jakub at gcc dot gnu.org
  Target Milestone: ---

struct S { int a, b; };

template <int N>
constexpr struct S var[16] =3D {};

template <>
constexpr inline struct S var<6>[8] =3D {
  { 1, 1 }, { 2, 0 }, { 3, 1 }, { 4, 0 },
  { 5, 1 }, { 6, 0 }, { 7, 1 }, { 8, 0 }
};

[[gnu::noipa]] void
foo (S)
{
}

template <int N>
void
bar (int x)
{
  foo (var<N>[x]);
}

volatile int x;

int
main ()
{
  bar <6> (x);
}

extracted from mesa no longer links starting with
r14-8987-gdd9d14f7d53de07beff06004922a2bff20ece671 (-O0 or -O2, doesn't
matter).
/usr/bin/ld: /tmp/cc4Mqq20.o: in function `void bar<6>(int)':
mesa.C:(.text._Z3barILi6EEvi[_Z3barILi6EEvi]+0x14): undefined reference to
`var<6>'
collect2: error: ld returned 1 exit status=