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[ExecuTorch][WebGPU] Add clone op (aten.clone.default) #20463

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[ExecuTorch][WebGPU] Add clone op (aten.clone.default) #20463

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JulianCloudNTH Jun 23, 2026
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7 changes: 7 additions & 0 deletions backends/webgpu/runtime/ops/view_copy/ViewCopy.cpp
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Expand Up @@ -53,10 +53,17 @@ void view_copy_impl(WebGPUGraph& graph, const std::vector<int>& args) {
add_flat_copy(graph, args.at(0), args.at(args.size() - 1));
}

// clone = flat copy; survives Vulkan RemoveRedundantOpsTransform in Llama 1B.
void clone_impl(WebGPUGraph& graph, const std::vector<int>& args) {
// args: [self, memory_format?, out]; out = last value-id.
add_flat_copy(graph, args.at(0), args.at(args.size() - 1));
}

} // namespace

WEBGPU_REGISTER_OPERATORS {
WEBGPU_REGISTER_OP(aten.view_copy.default, view_copy_impl);
WEBGPU_REGISTER_OP(aten.clone.default, clone_impl);
}

} // namespace executorch::backends::webgpu
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