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Slowly we are moving toward full support of sparse tensor *outputs*. First step was support for all-dense annotated "sparse" tensors. This step adds support for truly sparse tensors, but only for operations in which the values of a tensor change, but not the nonzero structure (this was refered to as "simply dynamic" in the [Bik96] thesis). Some background text was posted on discourse: https://llvm.discourse.group/t/sparse-tensors-in-mlir/3389/25 Reviewed By: gussmith23 Differential Revision: https://reviews.llvm.org/D104577