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 86F6B3851C27; Wed, 13 May 2020 14:13:25 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 86F6B3851C27
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1589379205;
 bh=lz+MoWycfdemUhCQhTRhhoprxpb3xa5I8UAduE9pfiA=;
 h=From:To:Subject:Date:In-Reply-To:References:From;
 b=q6nEvRXrLOiTqDLgLVnj/dKQXd+3aTKjSPhhFjxiWQleqeiR3V1vO8N2P2bGPate2
 2BCpq7Q+CKp8+MFcFrgtIlgjuRSH3mLmfPiVb4tb5AUKnminxQ3reP6AOxj2rlw0hp
 /rA0hadN+apkggAyXrb/c/1a3DM+meqNtnDZbf0I=
From: "ubizjak at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/95083] x86 fp_movcc expansion depends on real_cst sharing
Date: Wed, 13 May 2020 14:13:25 +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: 11.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: normal
X-Bugzilla-Who: ubizjak at gmail 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-95083-4-LFL7MYFghm@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-95083-4@http.gcc.gnu.org/bugzilla/>
References: <bug-95083-4@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: <http://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: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Wed, 13 May 2020 14:13:25 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95083

--- Comment #2 from Uro=C5=A1 Bizjak <ubizjak at gmail dot com> ---
It looks to me that a couple of (scalar) splitters are missing in sse.md.

There is vector

(define_insn_and_split "*<sse4_1>_blendv<ssemodesuffix><avxsizesuffix>_lt"

Defined as:

  [(set (match_operand:VF_128_256 0 "register_operand" "=3DYr,*x,x")
        (unspec:VF_128_256
          [(match_operand:VF_128_256 1 "register_operand" "0,0,x")
           (match_operand:VF_128_256 2 "vector_operand" "YrBm,*xBm,xm")
           (lt:VF_128_256
             (match_operand:<sseintvecmode> 3 "register_operand" "Yz,Yz,x")
             (match_operand:<sseintvecmode> 4 "const0_operand" "C,C,C"))]
          UNSPEC_BLENDV))]

(please note const0 operand 4).

Probably similar pattern is missing that would degrade to MIN/MAX, for vect=
or
and scalar versions.=