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 D8F2E3858431; Thu, 17 Feb 2022 12:38:54 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D8F2E3858431
From: "assaiante at diag dot uniroma1.it" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/104549] Missing variable at O2/O3 likely caused by
 -fearly-inlining
Date: Thu, 17 Feb 2022 12:38:54 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: debug
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: wrong-debug
X-Bugzilla-Severity: normal
X-Bugzilla-Who: assaiante at diag dot uniroma1.it
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: 
Message-ID: <bug-104549-4-DWVFwys1C8@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-104549-4@http.gcc.gnu.org/bugzilla/>
References: <bug-104549-4@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
X-BeenThere: gcc-bugs@gcc.gnu.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gcc-bugs mailing list <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Thu, 17 Feb 2022 12:38:55 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104549

--- Comment #3 from Cristian Assaiante <assaiante at diag dot uniroma1.it> =
---
I have tested multiple older gcc versions (4.3, 7.5, 9.4, 11.2) and apparen=
tly
the variable is visible in 4.3 and 7.5.=20
The asm for the main function of the binary from gcc7.5:
main:
.LFB1:
        # a.c:9
        .loc 1 9 0
        .cfi_startproc
# BLOCK 2 freq:10000 seq:0
# PRED: ENTRY [100.0%]  (FALLTHRU)
.LVL2:
        subq    $8, %rsp
        .cfi_def_cfa_offset 16
.LBB4:
.LBB5:
        # a.c:5
        .loc 1 5 0
        xorl    %edi, %edi
        xorl    %eax, %eax
        call    test@PLT
.LVL3:
.LBE5:
.LBE4:
        # a.c:11
        .loc 1 11 0
        xorl    %eax, %eax
        addq    $8, %rsp
        .cfi_def_cfa_offset 8
# SUCC: EXIT [100.0%]=20
        ret

Differently from more recent versions, the inlined a is in the LBB5...LBE5
range only. So there is no empty range associated to it and the debug info =
in
correctly visualized in gdb.=