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 55714385780D; Tue, 25 Jan 2022 11:02:16 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 55714385780D
From: "vries at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/99932] OpenACC/nvptx offloading execution regressions
 starting with CUDA 11.2-era Nvidia Driver 460.27.04
Date: Tue, 25 Jan 2022 11:02:16 +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: openacc
X-Bugzilla-Severity: normal
X-Bugzilla-Who: vries 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: attachments.created
Message-ID: <bug-99932-4-w7D7njMlDT@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-99932-4@http.gcc.gnu.org/bugzilla/>
References: <bug-99932-4@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: <https://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: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Tue, 25 Jan 2022 11:02:16 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99932

--- Comment #12 from Tom de Vries <vries at gcc dot gnu.org> ---
Created attachment 52285
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D52285&action=3Dedit
Cuda reproducer non-32 vector length

[ On T400, driver version 470.94 ]

NVCC SASS:
...
$ ./do.sh=20
NVCC SASS, ptxas=3D-O0:
+ /home/vries/cuda/11.5.1/bin/nvcc vector-length-64.cu -arch=3Dcompute_75
-code=3Dsm_75 -Xptxas -O0
+ ./a.out
NVCC SASS, ptxas=3D-O1:
+ /home/vries/cuda/11.5.1/bin/nvcc vector-length-64.cu -arch=3Dcompute_75
-code=3Dsm_75 -Xptxas -O1
+ ./a.out
<HANGS>
...

Driver SASS:
...
$ ./do.sh=20
DRIVER SASS, ptxas=3D-O0:
+ /home/vries/cuda/11.4.3/bin/nvcc vector-length-64.cu -arch=3Dcompute_75 -=
Xptxas
-O0
+ ./a.out
DRIVER SASS, ptxas=3D-O1:
+ /home/vries/cuda/11.4.3/bin/nvcc vector-length-64.cu -arch=3Dcompute_75 -=
Xptxas
-O1
+ ./a.out
<HANGS>
...=