builder: implement pointer atomics (missing in SPIR-V) via integers.#559
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builder: implement pointer atomics (missing in SPIR-V) via integers.#559
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This won't do anything useful on Rust-GPU
mainfor a while (since it relies on introducing pointer<->integer casts), but it avoids generating SPIR-V atomic accesses of pointer types (AFAIK illegal even in OpenCL SPIR-V).While the implementation is really tiny (thanks to pre-existing
bitcasting), you could imaginecoreimplementingAtomicPtr<_>on top ofAtomicUsizewith pointer<->integer casts around every operation.TODO: is this testable in any way yet?