[libc-commits] [PATCH] D146681: [libc] Add a loader utility for NVPTX architectures for testing

[Joseph Huber via Phabricator via libc-commits]

jhuber6 created this revision.
jhuber6 added reviewers: jdoerfert, tra, tianshilei1992, JonChesterfield, kevinsala, sivachandra, michaelrj, lntue.
Herald added subscribers: libc-commits, mikhail.ramalho, mattd, gchakrabarti, asavonic, ecnelises, tschuett.
Herald added projects: libc-project, All.
jhuber6 requested review of this revision.

This patch adds a loader utility targeting the CUDA driver API to launch
NVPTX images called `nvptx_loader`. This takes a GPU image on the
command line and launches the `_start` kernel with the appropriate
arguments. The `_start` kernel is provided by the already implemented
`nvptx/start.cpp`. So, an application with a `main` function can be
compiled and run as follows.

  clang++ --target=nvptx64-nvidia-cuda main.cpp crt1.o -march=sm_70 -o image
  ./nvptx_loader image args to kernel

This implementation is not tested and does not yet support RPC. This
requires further development to work around NVIDIA specific limitations
in atomics and linking.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D146681

Files:
  libc/utils/gpu/loader/CMakeLists.txt
  libc/utils/gpu/loader/nvptx/CMakeLists.txt
  libc/utils/gpu/loader/nvptx/Loader.cpp

-------------- next part --------------
A non-text attachment was scrubbed...
Name: D146681.507571.patch
Type: text/x-patch
Size: 6748 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/libc-commits/attachments/20230323/2a355806/attachment-0001.bin>