that is registered on the command line as `-affine-tile`, and with a tile size
option that can be set with `-affine-tile-size`.
+We also avoid `cl::opt` to provide pass options in favor of the
+[pass options](WritingAPass.md#instance-specific-pass-options) mechanism. This
+allows for these options to be serialized in a pass pipeline description, as
+well as passing different options to multiple instances of a pass in the same
+pipeline.
+
## Testing guidelines
See here for the [testing guide](TestingGuide.md).