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

	* dwarf2read.c (struct dwarf2_cu): Add type_hash.
	(struct die_info): Remove type.
	(read_type_die, read_typedef, read_base_type, read_subrange_type)
	(read_structure_type, read_enumeration_type, read_array_type)
	(read_tag_pointer_type, read_tag_ptr_to_member_type)
	(read_tag_reference_type, read_tag_const_type, read_tag_volatile_type)
	(read_tag_string_type, read_subroutine_type, read_set_type)
	(read_unspecified_type): Delete prototypes.  Remove check for
	already-loaded type.  Return the new type.
	(set_die_type): Return the new type.
	(reset_die_and_siblings_types): Delete.
	(load_comp_unit, load_full_comp_unit): Set type_hash.
	(process_queue): Remove call to reset_die_and_siblings_types.
	(process_die): Do not read most types here.  Use read_type_die
	for others.
	(read_func_scope, dwarf2_add_member_fn): Use read_type_die.
	(quirk_gcc_member_function_pointer): Return the new type.
	(process_structure_scope, process_enumeration_scope): Use
	get_die_type and read the DIE's type.
	(read_full_die): Do not initialize die->type.
	(tag_type_to_type): Use read_type_die.
	(read_type_die): Check for already defined types.  Return the
	type.
	(determine_prefix): Use get_die_type.
	(set_die_type): Return the type.
	(get_die_type): Take a CU argument.  Check for no type_hash.