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 5545F385840D; Tue, 23 Apr 2024 22:47:15 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 5545F385840D
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1713912435;
	bh=6NnTdd8HOC/jpcMHLWs1MFxqnA6/eKTkya5L6s/4pkU=;
	h=From:To:Subject:Date:From;
	b=O2RRSoX8G9fJyf0v8kNlpzEyBgweIfvJU64dBJwLGy+5WM5Oz+5FYnvFpiJJ8HTfR
	 ZX8Owxb585QCTkbAGjFffKibsmyOACk8I7QoQIGu4XPD2bPSzpRJHGGoA87DeJ56Cn
	 XQ2lKFNT6c8rswMpObKOaCdme7WjPUiASNQUTh/Y=
From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/114829] New: No fcsel produced for f16
Date: Tue, 23 Apr 2024 22:47:14 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: missed-optimization
X-Bugzilla-Severity: enhancement
X-Bugzilla-Who: pinskia 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: bug_id short_desc product version bug_status
 keywords bug_severity priority component assigned_to reporter
 target_milestone
Message-ID: <bug-114829-4@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=3D114829

            Bug ID: 114829
           Summary: No fcsel produced for f16
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Take:
```
void
foo (int a, _Float16 b1, _Float16 b2, _Float16 *b)
{
  *b =3D a ? b1 : b2;
}

```

This should produce:
```
foo:
        cmp     w0, #0
        fcsel   h0, h1, h0, eq
        str     h0, [x1]
        ret
```

Or :
```
foo:
        cmp     w0, #0
        fcsel   s0, s1, s0, eq
        str     h0, [x1]
        ret
```

Depending on if we have fp16 enabled or not.

Right now GCC produces branches instead.

Noticed while working on PR 98477 since *cmov<mode>_insn pattern uses GPF
iterator and not GPF_F16.=