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 C35563858CDA; Tue, 27 Jun 2023 16:28:18 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C35563858CDA
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1687883298;
	bh=N+YaE459Q/fHh932jt2QCwJIBxnHJCXf0is6U9hoV1g=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=UEsczJwdh1v0Nzkpf4ix0j/XrLsA9nh1eYVO1YLP3z/vBMi2+mlr8o6uKfsaPhMFl
	 rVEk97vqRe6QAXKTRQX4XGVrVAW3KLuKPj2HmR0sGMiFk/H/TfAur7in55dzYxIlET
	 8YZSSN9ztHDAG/Pe3pfqLr+CY5F4d/R3LHIukVAo=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/110420] [12/13/14 Regression] internal
 compiler error: in gimple_redirect_edge_and_branch due to
 simple_dce_from_worklist removing `asm goto`
Date: Tue, 27 Jun 2023 16:28:18 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: tree-optimization
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: ice-on-valid-code, inline-asm, patch
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: pinskia at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 13.2
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-110420-4-pNfRtJAr7i@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-110420-4@http.gcc.gnu.org/bugzilla/>
References: <bug-110420-4@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=3D110420

--- Comment #8 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:478840a2ca491fbff44371caee4983d1e7b7b7cf

commit r14-2133-g478840a2ca491fbff44371caee4983d1e7b7b7cf
Author: Andrew Pinski <apinski@marvell.com>
Date:   Mon Jun 26 17:14:06 2023 -0700

    Mark asm goto with outputs as volatile

    The manual references asm goto as being implicitly volatile already
    and that was done when asm goto could not have outputs. When outputs
    were added to `asm goto`, only asm goto without outputs were still being
    marked as volatile. Now some parts of GCC decide, removing the `asm got=
o`
    is ok if the output is not used, though not updating the CFG (this happ=
ens
    on both the RTL level and the gimple level). Since the biggest user of =
`asm
goto`
    is the Linux kernel and they expect them to be volatile (they use them =
to
    copy to/from userspace), we should just mark the inline-asm as volatile.

    OK? Bootstrapped and tested on x86_64-linux-gnu.

            PR middle-end/110420
            PR middle-end/103979
            PR middle-end/98619

    gcc/ChangeLog:

            * gimplify.cc (gimplify_asm_expr): Mark asm with labels as
volatile.

    gcc/testsuite/ChangeLog:

            * gcc.c-torture/compile/asmgoto-6.c: New test.=