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 6A4373858298; Thu,  9 Mar 2023 15:27:56 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 6A4373858298
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1678375676;
	bh=ns9eH6Ch1qotmqWnpfYbKXWTBtatP+5J2zUBMo+zoE0=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=wwAX5NCtnQXuSToeKTB6fgWzpqjiAP/tgtCGl9Ej9X+42SOon2RaSJX5MIC0aee1S
	 rj2vbqY6vQeDvdkHNlpVsbgK+wEcODtP1KFqErPzOIBJa+fOmfIzwlRfJz6NC2COAE
	 /yGhKpTh0WYwl0SsaQrYDlI5HtzBx9glf/Wc0J9A=
From: "stammark at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/100000] non-leaf epologue/prologue used if MVE v4sf is
 used for load/return
Date: Thu, 09 Mar 2023 15:27:55 +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: enhancement
X-Bugzilla-Who: stammark at gcc dot gnu.org
X-Bugzilla-Status: ASSIGNED
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: cc bug_status
Message-ID: <bug-100000-4-C5rxwNFNse@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-100000-4@http.gcc.gnu.org/bugzilla/>
References: <bug-100000-4@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=3D100000

Stam Markianos-Wright <stammark at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |stammark at gcc dot gnu.org
             Status|NEW                         |ASSIGNED

--- Comment #4 from Stam Markianos-Wright <stammark at gcc dot gnu.org> ---
I tried out Richard's suggestion in arm_vector_mode_supported_p (allowing V=
8HF,
V4SF and V2DF unconditionally) and it seems to have worked! After a testsui=
te
run I found a few ICEs due to a number of patterns that needed enabling:

@mve_vpselq_<supf><mode> which was only enabled for mve.fp

And then all the patterns that were conditional on:
-  "((TARGET_HAVE_MVE && VALID_MVE_SI_MODE (<MODE>mode))
-    || (TARGET_HAVE_MVE_FLOAT && VALID_MVE_SF_MODE (<MODE>mode)))

mve_vec_extract<mode><V_elem_l>
*mve_vec_extract_sext_internal<mode>
*mve_vec_extract_zext_internal<mode>
mve_vec_set<mode>_internal
*movmisalign<mode>_mve_store
*movmisalign<mode>_mve_load

These weren't causing any ICEs but also made sense to enable:
mve_vst2q<mode>
mve_vld2q<mode>
mve_vld4q<mode>

No regressions after that, but I think I will hold off until GCC14 Stage 1 =
to
post this patch, just to be safe.=