mbrookhart commented on a change in pull request #7126:
URL: https://github.com/apache/tvm/pull/7126#discussion_r547556384
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File path: include/tvm/topi/transform.h
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@@ -1386,6 +1386,96 @@ inline Array<Tensor> meshgrid(const Array<Tensor>&
inputs, const std::string& in
return result;
}
+/*!
+ * \brief Fill Empty rows of a sparse tensor with default value
+ *
+ * \param sparse_indices Indices where values of the dense tensor exist
+ * \param sparse_values Values at the above indices respectively
+ * \param default_value Default value at to be used at empty rows
+ * \param dense_shape Dense shape of the sparse tensor
+ * \param name The name of the operation
+ * \param tag The tag to mark the operation
+ *
+ * \return A Tensor whose op member is the SparseFillEmptyRows operation
+ */
+inline Array<Tensor> SparseFillEmptyRows(const Tensor& sparse_indices, const
Tensor& sparse_values,
+ const Tensor& default_value,
+ const Array<Integer>& dense_shape,
+ const std::string name =
"T_sparse_fill_empty_rows",
+ std::string tag = kInjective) {
+ Array<Tensor> result;
+ Array<PrimExpr> sp_ordered_output_shape;
+ sp_ordered_output_shape.push_back(dense_shape[0] + sparse_indices->shape[0]);
+ if (sparse_indices->shape.size() > 1) {
+ sp_ordered_output_shape.push_back(sparse_indices->shape[1]);
+ }
+ auto empty_row_indicator =
+ compute(Array<PrimExpr>{dense_shape[0]}, [&](const Array<Var>& indices) {
+ PrimExpr ret = PrimExpr(Bool(1));
+ for (int i = 0; i < GetConstInt(sparse_indices->shape[0]); ++i) {
Review comment:
I would like to see this done in a way that supports dynamic shapes,
this will crash a compile time if we have a dynamic input.
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