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I could not find how to integrate this into a C++ program. Does it need ATen or is there a lower level of integration? Is there even the possibility of getting C bindings?

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Tensor Comprehensions does not try to own memory allocation and CPU/GPU transfers. ATen is one simple way of getting that, which we used for tests. Anything convertible to DLPack tensors should work as long as nothing fancy happens with tensor shapes.

C bindings don't seem to be a priority.

Feel free to use the contacts provided in the documentation here: https://facebookresearch.github.io/TensorComprehensions/cont....

It makes sense to let client code handle allocations and whatnot. What I cannot find is how to pass one or more tensors (given, I suppose, by some shape parameters and a pointer to the data buffer) to Tensor Comprehensions.

I would have expected that operations expressed in the tensor language could be compiled once and for all (for a given target) into a DLL, and then it would be just a matter of passing the right buffer and shape parameters to a function. I see no reason why this should not be easily handled in C (which makes it easier to bind it from most languages).

If I understand correctly, DLPack is the format of choice to express a tensor, and ATen is not required, but I cannot find examples using DLPack

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