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Fix regression in debug info for Ada with DWARF 5

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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.

gcc/
	* dwarf2out.c (add_scalar_info): Deal with DW_AT_data_bit_offset.
This commit is contained in:
Eric Botcazou 2021-08-16 15:26:22 +02:00
parent e660441f94
commit be024a1285
1 changed files with 1 additions and 0 deletions
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gcc/dwarf2out.c
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@ -21253,6 +21253,7 @@ add_scalar_info (dw_die_ref die, enum dwarf_attribute attr, tree value,
{
if (get_AT (decl_die, DW_AT_location)
|| get_AT (decl_die, DW_AT_data_member_location)
|| get_AT (decl_die, DW_AT_data_bit_offset)
|| get_AT (decl_die, DW_AT_const_value))
{
add_AT_die_ref (die, attr, decl_die);