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 A5BE33848421; Fri, 14 May 2021 21:28:43 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A5BE33848421
From: "dragan.mladjenovic at syrmia dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/100604] GCC generates invalid LO_SYM for unaligned
 global
Date: Fri, 14 May 2021 21:28:43 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Version: 11.1.1
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: dragan.mladjenovic at syrmia dot com
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-100604-4-geRKGhhFS9@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-100604-4@http.gcc.gnu.org/bugzilla/>
References: <bug-100604-4@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, 14 May 2021 21:28:43 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100604

--- Comment #2 from dragan.mladjenovic at syrmia dot com ---
It seems so. Something like this helps in this case:

diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 07e908624a0..a102a9288c5 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -2385,7 +2385,7 @@ adjust_address_1 (rtx memref, machine_mode mode,
poly_int64 offset,
       if (GET_MODE (memref) !=3D BLKmode
          && GET_CODE (addr) =3D=3D LO_SUM
          && known_in_range_p (offset,
-                              0, (GET_MODE_ALIGNMENT (GET_MODE (memref))
+                              0, (MIN (GET_MODE_ALIGNMENT (GET_MODE (memre=
f)),
attrs.align)
                                   / BITS_PER_UNIT)))
        addr =3D gen_rtx_LO_SUM (address_mode, XEXP (addr, 0),
                               plus_constant (address_mode,

Don't know which one to trust. The memref has SImode. Caller wants to create
HImode one. The attrs.align matches that of HImode.=