Update toolchain to nightly-03-02.#155
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LegNeato merged 9 commits intoRust-GPU:mainfrom Mar 13, 2025
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This includes several updates to the backend based on changes in rustc_codegen_llvm, which brings some bug fixes and a refactor to debug info. This fixes failing dependencies that resolved to newer versions that failed to build on the previous nightly. Removes depending on rustc_codegen_llvm as it can't be imported with the new toolchain for some reason. The example cuda kernals fail to build. Their dependencies cause nvvm to abort with ICE.
Nvvm codegen compiles with latest nightly, and is able to codegen `core` and other essential crates. `libm` causes ICE and is next on the list to fix.
Previous change was just to get the backend to compile. This gets libm to compile now.
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`register_attr` was removed in favor of `register_tool`. This updates how the nvvm attributes are applied in our proc_macros and how the nvvm backend parses them. Also removes redundant applications of no_std, as cuda_builder applies it to all crates built on the cuda target via rustc flags. The add example crate now compiles and runs the geneated ptx! :D
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I'm not qualified to review the LLVM side, the rust backend stuff looks sane. Let's land and iterate as it is strictly better than what is there. |
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The purpose of this change is to update the rust toolchain to a more recent release; specifically,
nightly-2025-03-02.New toolchain means new rustc internal interface changes that needed to be made. Much of the logic is just copied from the llvm backend, with some changes to conform to nvvm specific logic and where assumptions of opaque pointers deviate with typed pointers. A major refactor to the debug metadata in the llvm backend was also brought in (though likely very unnecessary).
LLVM rust wrapper changes includes:
char*andsize_tlengths to createStringRefs internally.Changes to cuda_builder when building cuda targets include:
no_stdsaturating_float_casts=falseas nvvm does not support saturating float to int casts.nvvm_internalas a tool attribute in all cratesComplies and runs the
addexample. Neitherpath_traceror optix examples have been tested with these changes.Thanks to @apriori for attempting the previous port, which served as a helpful guide for this port.