From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <sourceware-bugzilla@sourceware.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 8DBD53858D3C; Sun, 27 Aug 2023 16:59:56 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8DBD53858D3C
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org;
	s=default; t=1693155596;
	bh=wAeHh9GcnOsEHsqeUKq8DdgTD003Keu4vvVw30J4514=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=EpHv4+PpuQB2H8211MLL3PzrMn2fTjSvFPibMC6W6md+UDvqnWbqJbHZ0TP5EORcL
	 eoEMC3WuO+SZ9aAAPbswY7pvyZlmKtcfjRBA0WC6Kw/2r7C4lxs94daFWs98QZ0itq
	 UGRXZyKbt+LD4zwHBP8gYDupO5RsHbp5PsJOygw8=
From: "tromey at sourceware dot org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug c++/21892] value of constexpr variable is "<optimized out>" (no
 optimization)
Date: Sun, 27 Aug 2023 16:59:51 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gdb
X-Bugzilla-Component: c++
X-Bugzilla-Version: unknown
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: tromey at sourceware dot org
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P2
X-Bugzilla-Assigned-To: unassigned at sourceware dot org
X-Bugzilla-Target-Milestone: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: cc
Message-ID: <bug-21892-4717-S5gGTmL525@http.sourceware.org/bugzilla/>
In-Reply-To: <bug-21892-4717@http.sourceware.org/bugzilla/>
References: <bug-21892-4717@http.sourceware.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
X-Bugzilla-URL: http://sourceware.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
List-Id: <gdb-prs.sourceware.org>

https://sourceware.org/bugzilla/show_bug.cgi?id=3D21892

Tom Tromey <tromey at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tromey at sourceware dot o=
rg

--- Comment #3 from Tom Tromey <tromey at sourceware dot org> ---
I needed -fno-eliminate-unused-debug-types for this.

This looks like a compiler bug to me.
The DWARF for A::a is:

 <2><35>: Abbrev Number: 5 (DW_TAG_variable)
    <36>   DW_AT_name        : a
    <38>   DW_AT_decl_file   : 1
    <39>   DW_AT_decl_line   : 2
    <3a>   DW_AT_decl_column : 34
    <3b>   DW_AT_linkage_name: (indirect string, offset: 0x0): _ZN1A1aE
    <3f>   DW_AT_type        : <0x60>
    <43>   DW_AT_external    : 1
    <43>   DW_AT_declaration : 1
    <43>   DW_AT_const_expr  : 1
    <43>   DW_AT_inline      : 1        (inlined)

There's no location here, just a linkage name.
However, that symbol isn't defined.

--=20
You are receiving this mail because:
You are on the CC list for the bug.=