| commit | dad7442aff5c85ff9141b0d0f231bcd731cbadc6 | [log] [tgz] |
|---|---|---|
| author | Joseph Huber <huberjn@outlook.com> | Wed Jul 10 15:07:11 2024 -0500 |
| committer | GitHub <noreply@github.com> | Wed Jul 10 15:07:11 2024 -0500 |
| tree | f839b579864d02fc018f080ed8cba9c41ef0dedc | |
| parent | e6352604cda75270b24f55c02eddbd4bc648d537 [diff] |
[compiler-rt] Initial support for builtins on GPU targets (#95304) Summary: This patch adds initial support to build the `builtins` library for GPU targets. Primarily this requires adding a few new architectures for `amdgcn` and `nvptx64`. I built this using the following invocations. ```console $ cmake ../compiler-rt -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_BUILD_TYPE=Release -GNinja -DCMAKE_C_COMPILER_TARGET=<nvptx64-nvidia-cuda|amdgcn-amd-amdhsa> -DCMAKE_CXX_COMPILER_TARGET=<nvptx64-nvidia-cuda|amdgcn-amd-amdhsa> -DCMAKE_C_COMPILER_WORKS=1 -DCMAKE_CXX_COMPILER_WORKS=1 -DLLVM_CMAKE_DIR=../cmake/Modules -DCOMPILER_RT_DEFAULT_TARGET_ONLY=ON -C ../compiler-rt/cmake/caches/GPU.cmake ``` Some pointers would be appreciated for how to test this using a standard (non-default target only) build. GPU builds are somewhat finnicky. We only expect this to be built with a sufficiently new clang, as it's the only compiler that supports the target and output we distribute. Distribution is done as LLVM-IR blobs for now. GPUs have little backward compatibility, so linking object files is left to a future patch. More work is necessary to build correctly for all targets and ship into the correct clang resource directory. Additionally we need to use the `libc` project's support for running unit tests.
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