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 D7FB03858D1E; Fri, 11 Feb 2022 11:52:06 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D7FB03858D1E
From: "avieira at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/104498] Alias attribute being ignored by
 scheduler
Date: Fri, 11 Feb 2022 11:52:06 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: rtl-optimization
X-Bugzilla-Version: unknown
X-Bugzilla-Keywords: alias, wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: avieira 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: ---
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-104498-4-WfMddeZ43M@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-104498-4@http.gcc.gnu.org/bugzilla/>
References: <bug-104498-4@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: Fri, 11 Feb 2022 11:52:07 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D104498

--- Comment #3 from avieira at gcc dot gnu.org ---
Sorry some confusion there, I thought it was base_alias_check bailing out
early, but that seems to return true, it is the memrefs_conflict_p that ret=
urns
0.

I suspect rtx_equal_for_memref_p should have returned 1 for:
x:
(plus:DI (mult:DI (reg:DI 99 [ off.0_1 ])
        (const_int 4 [0x4]))
    (const:DI (plus:DI (symbol_ref:DI ("*.LANCHOR0") [flags 0x182])
            (const_int 16 [0x10]))))

and y:
(plus:DI (mult:DI (reg:DI 99 [ off.0_1 ])
        (const_int 4 [0x4]))
    (symbol_ref:DI ("b") [flags 0x2] <var_decl 0xfffff7635f30 b>))

But it does not... must be because of that trailing (equivalence notes? tha=
t's
what I assume they are?)=