Re: locexpr vs. loclist 1 entry

[Roland McGrath <roland at redhat dot com>]

> $ src/dwarfcmp ./a.out ./a.out.out
> 3d vs 57: data_member_location={locexpr} vs 
> data_member_location={loclist 1 entries}
> 
> It's certainly not optimal to store it this way, but aren't these two 
> cases actually equal?  (Um, assuming there's no other difference, like 
> the bytecode being actually different, which I didn't check.)

Technically it's not even possible to have a location list in
DW_AT_data_member_location, unless you're using the new DW_FORM_sec_offset.
(Any data* form there is not a loclistptr, but a constant.)

I think in the current code a plain location expr should be treated the
same as a location list with a single range from 0 to ~0.  It might not
be smart about ~0 in 32-bit address-size though, that wouldn't surprise me.
What's the actual dump of these two objects?


Thanks,
Roland