Function conv_size_of_call 

fn conv_size_of_call<'tcx>(
    tcx: TyCtxt<'tcx>,
    def_id: DefId,
    pair: Pair<'_, Rule>,
) -> ContractExpr<'tcx>

Convert size_of::<T>() / align_of::<T>() (optionally std::mem:: / core::mem:: prefixed) into SizeOf / AlignOf.