Function rustc_codegen_llvm::debuginfo::metadata::prepare_union_metadata

fn prepare_union_metadata<'ll, 'tcx>(
    cx: &CodegenCx<'ll, 'tcx>, 
    union_type: Ty<'tcx>, 
    unique_type_id: UniqueTypeId, 
    span: Span
) -> RecursiveTypeDescription<'ll, 'tcx>