||Implicit location descriptions not mentioned in DW_OP_bit_piece description
Section 18.104.22.168, pg 29
The DW_OP_bit_piece description talks about the meaning of offset for empty
location descriptions, register location descriptions and memory addresses, but don't
talk about its meaning for implicit location descriptions (DW_OP_stack_value and
I'd say they should be handled like register location descriptions, i.e. offset
should be from the least significant bit of the value on the top of the stack.