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 8A8D73858C74; Fri, 21 Apr 2023 20:34:38 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 8A8D73858C74
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1682109278;
	bh=5pYsI1HOM7fTdqiNIlSmMWUzpIUu4c2N07DZBjgo8cM=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=U1iq8bC0i2KKHuoxLcAtRfKkzaz9NXMqLhhSNigDsAyLBNSI5+Gsb9tRsIF31vMLp
	 iCGS62tiZiDbgcR6TqnNZvHzu4fx4ZeAzYMP/TnzdLsvorOs2en7yieqF4+MCbnuuh
	 01o4aSbWmxLJMJbuzctbXeohfo8MsVhQ6EMwykQ8=
From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/109546] [13/14 Regression]  Missed Dead Code
 Elimination when using __builtin_unreachable since r13-3596-ge7310e24b1c0ca
Date: Fri, 21 Apr 2023 20:34:38 +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: 13.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: normal
X-Bugzilla-Who: cvs-commit 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: 13.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-109546-4-o9tvS7h4Ug@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-109546-4@http.gcc.gnu.org/bugzilla/>
References: <bug-109546-4@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=3D109546

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Andrew Macleod <amacleod@gcc.gnu.org>:

https://gcc.gnu.org/g:f828503eeb79ad1f1ada6db7deccc5abcc2f3ca3

commit r14-160-gf828503eeb79ad1f1ada6db7deccc5abcc2f3ca3
Author: Andrew MacLeod <amacleod@redhat.com>
Date:   Fri Apr 21 15:03:43 2023 -0400

    Do not fold ADDR_EXPR conditions leading to builtin_unreachable early.

    Ranges can not represent &var globally yet, so we cannot fold these
    expressions early or we lose the __builtin_unreachable information.

            PR tree-optimization/109546
            gcc/
            * tree-vrp.cc (remove_unreachable::remove_and_update_globals): =
Do
            not fold conditions with ADDR_EXPR early.

            gcc/testsuite/
            * gcc.dg/pr109546.c: New.=