Support tensor.pad in the layout pipeline - #3221
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This change adds support for a tensor.pad op in the layout pipeline. By default, tensor.pad lowers with no overhead: it just materializes as a change to the layout descriptor (precomposing the layout relation with a "padded to unpadded" relation), and if downstream kernels are compatible, no explicit layout conversion is needed. For ops where they are needed, layout-propagation will ensure a layout conversion is inserted, and that layout conversion will incorporate the padding as well. The problem is that this layout_conversion step will be slow. PiperOrigin-RevId: 949162359
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Support tensor.pad in the layout pipeline
This change adds support for a tensor.pad op in the layout pipeline. By default, tensor.pad lowers with no overhead: it just materializes as a change to the layout descriptor (precomposing the layout relation with a "padded to unpadded" relation), and if downstream kernels are compatible, no explicit layout conversion is needed. For ops where they are needed, layout-propagation will ensure a layout conversion is inserted, and that layout conversion will incorporate the padding as well. The problem is that this layout_conversion step will be slow.