Function coverage_check_shapes 

pub(super) fn coverage_check_shapes(
    shapes: &[(usize, usize)],
) -> Vec<(usize, usize)>

Selects the minimal set of shapes needed to verify that an ORT TRT EP cached profile covers all shapes in shapes.

ORT’s TRT EP stores engine profiles as per-dimension [min, max] ranges. Verifying complete coverage requires bounding all four dimension extremes independently. This function returns at most 4 representative shapes — one with min_batch, one with max_batch, one with min_seq, one with max_seq — deduplicated so the same shape is never run twice.

When the shard has only one unique extreme in a dimension (e.g. all shapes share the same batch size), the duplicates collapse and the returned set is smaller.