DW_AT_name        : a1
DW_AT_bit_size    : 6
DW_AT_data_bit_offset: 0x20
DW_AT_name        : b1
DW_AT_bit_size    : 7
DW_AT_data_bit_offset: 0x26
DW_AT_name        : c1
DW_AT_bit_size    : 14
DW_AT_data_bit_offset: 0x2d
DW_AT_name        : d1
DW_AT_bit_size    : 5
DW_AT_data_bit_offset: 0x3b
DW_AT_name        : a2
DW_AT_bit_size    : 31
DW_AT_name        : b2
DW_AT_bit_size    : 1
DW_AT_name        : c2
DW_AT_bit_size    : 19
DW_AT_name        : d2
DW_AT_bit_size    : 13
