* dwarf2out.h (enum dw_val_class): Add dw_val_class_const_implicit,

	* dwarf2out.h (enum dw_val_class): Add dw_val_class_const_implicit,
	dw_val_class_unsigned_const_implicit and dw_val_class_file_implicit.
	(struct dw_val_node): Add val_file_implicit field.
	* dwarf2out.c (dw_val_equal_p, print_dw_val, attr_checksum,
	attr_checksum_ordered, same_dw_val_p, size_of_die, value_format,
	output_die): Handle dw_val_class_const_implicit,
	dw_val_class_unsigned_const_implicit and dw_val_class_file_implicit.
	(abbrev_die_table): Change into va_gc vec.
	(abbrev_die_table_allocated, abbrev_die_table_in_use,
	ABBREV_DIE_TABLE_INCREMENT): Remove.
	(AT_int, AT_unsigned, AT_file): Allow dw_val_class_*_implicit.
	(abbrev_opt_start, abbrev_usage_count, sorted_abbrev_dies): New
	variables.
	(build_abbrev_table): Adjust for abbrev_die_table being a va_gc vec.
	If abbrev_opt_start, fill in abbrev_usage_count and abbrev_dies
	vectors.
	(die_abbrev_cmp, optimize_implicit_const, optimize_abbrev_table): New
	functions.
	(output_die_abbrevs): For DW_FORM_implicit_const emit sleb128 with
	the implicit value.
	(output_abbrev_section): Adjust for abbrev_die_table being a va_gc
	vec.
	(output_comp_unit): Initialize abbrev_opt_start if emitting the main
	unit.  Call optimize_abbrev_table.
	(dwarf2out_init, dwarf2out_finish, dwarf2out_c_finalize): Adjust for
	abbrev_die_table being a va_gc vec.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@241709 138bc75d-0d04-0410-961f-82ee72b054a4