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 597A0388A82B; Tue,  8 Sep 2020 13:22:26 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 597A0388A82B
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1599571346;
 bh=2vYiNE1x9JDeX4phWqwShk8qJ/NuG3SQSJQm+aePBb8=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=CozoT3OEHJO4nKH8oDf355kWfvslMor0rvrE+/ezsYMOGUdHfSzjowm95lpsblf6Q
 9ofwrzirMttYZ2XacHepilniQX58p2kXFtskRg9IZAZJ3LR3HBsQaol9bEAlQi3uvE
 dLII/hpSl9e7npzLMW4wgl99donCqktwAQe4p1mk=
From: "simon.marchi at polymtl dot ca" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug debug/96937] Duplicate DW_TAG_formal_parameter in out-of-line
 DW_TAG_subprogram instance
Date: Tue, 08 Sep 2020 13:22:26 +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: 11.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: simon.marchi at polymtl dot ca
X-Bugzilla-Status: WAITING
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-96937-4-4l6ftL0naO@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-96937-4@http.gcc.gnu.org/bugzilla/>
References: <bug-96937-4@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: Tue, 08 Sep 2020 13:22:26 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D96937

--- Comment #5 from Simon Marchi <simon.marchi at polymtl dot ca> ---
(In reply to Richard Biener from comment #3)
> Hmm, can you point out the issue in the reduced testcase?  I can't see it=
.=20
> The only cloning done I see is partial inlining so does
> -fno-partial-inlining fix the issue for you?

Doh, I indeed uploaded the wrong thing.  My creduce test was trying to
reproduce the "wrong parameter order" problem, which I later found was prob=
ably
not considered a bug, instead of the "duplicate parameter problem".  I re-r=
an
it with the right test, I attached the result.

The relevant portion of the DWARF is:

0x000003bb:   DW_TAG_subprogram
                DW_AT_abstract_origin   (0x00000383 "do_examine")
                DW_AT_low_pc    (0x0000000000000000)
                DW_AT_high_pc   (0x0000000000000039)
                DW_AT_frame_base        (DW_OP_call_frame_cfa)
                DW_AT_GNU_all_call_sites        (true)
                DW_AT_sibling   (0x00000464)

0x000003d6:     DW_TAG_variable
                  DW_AT_abstract_origin (0x000003a4 "ai")

0x000003db:     DW_TAG_variable
                  DW_AT_abstract_origin (0x000003af "aq")
                  DW_AT_location        (DW_OP_fbreg -17)

0x000003e3:     DW_TAG_formal_parameter
                  DW_AT_abstract_origin (0x0000039f)
                  DW_AT_location        (<decoding error> 9f 03 00 00 9f)

0x000003ef:     DW_TAG_formal_parameter
                  DW_AT_abstract_origin (0x0000039a)
                  DW_AT_location        (<decoding error> 9a 03 00 00 9f)

0x000003fb:     DW_TAG_formal_parameter
                  DW_AT_abstract_origin (0x00000390 "y")

0x00000400:     DW_TAG_formal_parameter
                  DW_AT_abstract_origin (0x00000390 "y")

The last two DW_TAG_formal_parameter refer to the same parameter.=