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 CA21A3851425; Fri, 26 Aug 2022 16:35:09 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CA21A3851425
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1661531709;
	bh=UT90l+56nK/UKE8zttTj8SrswV6QaPxM9MN4G3M3YIQ=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=NzEIlIXRI1NlXT9oHCuBVRh9GWlW2kA5MQAbujThkdWzvvpfvcSN0CqcvtWV/cZVa
	 k2w+k9d2DvSzYJfDD3EfBA9Q+nuTa4QMp8y7oTbudFguAkt8HxfNBg2GKL5OwA6TJq
	 iPuSYN3PxsAibYSOo8qjdNBQ+mddb9Xf7fJn+Xg0=
From: "bergner at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/106755] Incorrect code gen for altivec intrinsics with
 constant inputs
Date: Fri, 26 Aug 2022 16:35:09 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c
X-Bugzilla-Version: 12.2.1
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: blocker
X-Bugzilla-Who: bergner at gcc dot gnu.org
X-Bugzilla-Status: NEW
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-106755-4-bcShWuaNiP@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-106755-4@http.gcc.gnu.org/bugzilla/>
References: <bug-106755-4@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=3D106755

--- Comment #2 from Peter Bergner <bergner at gcc dot gnu.org> ---
So the tests (I've removed all static inline usage and always use -fno-inli=
ne)
pass with -O1 and fail with -O2 and -O3.  Looking at all of the optimizatio=
ns
enabled by -O2 that are not in -O1 and using -fno-* for them, the only opti=
on
that allows the tests to pass with -O2 is -fno-strict-aliasing.  That said,
-Wall and -Wstrict-aliasing do not flag any warnings with the code.  I supp=
ose
they could miss some issues in the test case code???

In addition, if I move the vec_muludq() function to its own source file, th=
en
the tests pass with -O2 and -O3.=