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 28DE83851C21; Thu,  6 May 2021 14:58:32 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 28DE83851C21
From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/100445] [12 Regression] ice during RTL pass: vregs
Date: Thu, 06 May 2021 14:58:32 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 12.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: ubizjak at gmail dot com
X-Bugzilla-Status: ASSIGNED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P3
X-Bugzilla-Assigned-To: jakub at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 12.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-100445-4-05hZ9h9DYa@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-100445-4@http.gcc.gnu.org/bugzilla/>
References: <bug-100445-4@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: Thu, 06 May 2021 14:58:32 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100445

--- Comment #10 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
Following patch fixes the failures:

--cut here--
diff --git a/gcc/config/i386/i386-expand.c b/gcc/config/i386/i386-expand.c
index 4dfe7d6c282..61b2f921f41 100644
--- a/gcc/config/i386/i386-expand.c
+++ b/gcc/config/i386/i386-expand.c
@@ -3490,7 +3490,11 @@ static bool
 ix86_use_mask_cmp_p (machine_mode mode, machine_mode cmp_mode,
                     rtx op_true, rtx op_false)
 {
-  if (GET_MODE_SIZE (mode) =3D=3D 64)
+  int vector_size =3D GET_MODE_SIZE (mode);
+
+  if (vector_size < 16)
+    return false;
+  else if (vector_size =3D=3D 64)
     return true;

   /* When op_true is NULL, op_false must be NULL, or vice versa.  */
--cut here--

But perhaps 64bit V2SI, V4HI and V8QI vpcmp insns can be emulated via their
128bit versions?=