Function get_template_parameters

pub(super) fn get_template_parameters<'ll, 'tcx>(
    cx: &GenericCx<'ll, FullCx<'ll, 'tcx>>,
    generics: &Generics,
    args: GenericArgsRef<'tcx>,
) -> SmallVec<[Option<&'ll Metadata>; 16]>