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 D4B953858C42; Tue,  9 Jan 2024 02:06:34 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D4B953858C42
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1704765994;
	bh=qmKuX16w9NOvM4hv9fEwzRrw6J+hqpYJK7ginDvUFUQ=;
	h=From:To:Subject:Date:In-Reply-To:References:From;
	b=Uf34aP+q1U6U6O2SDDpc/3VaOgKyAsH0jzFJK81VZ1D3HF/bbO5cGbNBCIXa2sguC
	 yI9GYzaI1QdniJzuyHFXj1/k7ikJLehfdNSl5hXRcn7uVIVnQjs0Nhl0hG16jlrtxf
	 Z11xCbDqiR9bRxNlJdQA2y1xNydR0YstdDahZ7eA=
From: "juzhe.zhong at rivai dot ai" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/113281] [14] RISC-V rv64gcv_zvl256b vector: Runtime
 mismatch with rv64gc
Date: Tue, 09 Jan 2024 02:06:34 +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: 14.0
X-Bugzilla-Keywords: wrong-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: juzhe.zhong at rivai dot ai
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-113281-4-ENuTTs8WFp@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-113281-4@http.gcc.gnu.org/bugzilla/>
References: <bug-113281-4@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=3D113281

--- Comment #4 from JuzheZhong <juzhe.zhong at rivai dot ai> ---
Confirm reduced case:

#include <assert.h>
unsigned char a;

int main() {
  short b =3D a =3D 0;
  for (; a !=3D 19; a++)
    if (a)
      b =3D 32872 >> a;

  assert (b =3D=3D 0);
}

with -fno-vect-cost-model -march=3Drv64gcv -O3:

https://godbolt.org/z/joGb3e9Eb

Also run failed assertion "b =3D=3D 0" failed: file "bug.c", line 10, funct=
ion:
main

I suspect ARM SVE has the same fail.

Hi, Andrew. Could you test this case on ARM to see whether ARM has same iss=
ue
as RISC-V for me ?=