* dwarf2read.c (struct dwarf2_cu): Add dies.

	* dwarf2read.c (struct dwarf2_cu): Add dies.
	(struct dwarf2_per_cu_data): Shrink length field to add new
	queued flag.
	(make_cleanup_free_die_list, do_free_die_list_cleanup): Remove.
	(dwarf_alloc_block): Take a dwarf2_cu argument.  Allocate
	blocks on the partial_die_obstack.
	(dwarf2_find_comp_unit_psymtab, struct dwarf2_queue_item)
	(dwarf2_queue, queue_comp_unit, process_queue): New.
	(load_full_comp_unit, process_full_comp_unit): New functions,
	split from psymtab_to_symtab_1.
	(psymtab_to_symtab_1): Remove.
	(dwarf2_build_psymtabs_hard): Initialize the whole dwarf2_cu
	structure.  Cache the psymtab if we have a per_cu structure.
	(load_comp_unit): Initialize the whole dwarf2_cu structure.
	(dwarf2_psymtab_to_symtab): Restore dwarf2_per_objfile here.
	(read_full_die): Queue compilation units for references.
	(read_attribute_value): Update calls to dwarf_alloc_block.
	(follow_die_ref): Follow inter-complation-unit references.
	(free_comp_units_worker): Free the die list.
	(get_die_type): Take the hash table as an argument.
	(reset_die_and_siblings_types): Don't try to restore types
	if none were saved.