Frederik Gossen d4e4d5d780 [MLIR][Shape] Allow for shape_of to return extent tensors
The operation `shape.shape_of` now returns an extent tensor `tensor<?xindex>` in
cases when no error are possible. All consuming operation will eventually accept
both, shapes and extent tensors.

Differential Revision: https://reviews.llvm.org/D84160
2020-07-24 08:40:40 +00:00
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