[patch] Fix regression in debug info for Ada with DWARF 5

Richard Biener richard.guenther@gmail.com
Mon Aug 16 12:25:05 GMT 2021


On Mon, Aug 16, 2021 at 12:25 PM Eric Botcazou <botcazou@adacore.com> wrote:
>
> Hi,
>
> add_scalar_info can directly generate a reference to an existing DIE for a
> scalar attribute, e.g the upper bound of a VLA, but it does so only if this
> existing DIE has a location or is a constant:
>
>               if (get_AT (decl_die, DW_AT_location)
>                   || get_AT (decl_die, DW_AT_data_member_location)
>                   || get_AT (decl_die, DW_AT_const_value))
>
> Now, in DWARF 5, members of a structure that are bitfields no longer have a
> DW_AT_data_member_location but a DW_AT_data_bit_offset attribute instead, so
> the condition is bypassed.
>
> Tested on x86-64/Linux, OK for mainline and 11 branch?

OK

>
> 2021-08-16  Eric Botcazou  <ebotcazou@adacore.com>
>
>         * dwarf2out.c (add_scalar_info): Deal with DW_AT_data_bit_offset.
>
> --
> Eric Botcazou


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