/*?Functions?dealing?with?attribute?handling?used?by?most?front?ends.
???Copyright?（C）?1992?1993?1994?1995?1996?1997?1998?1999?2000?2001
???2002?2003?2004?2005?Free?Software?Foundation?Inc.

This?file?is?part?of?GCC.

GCC?is?free?software;?you?can?redistribute?it?and/or?modify?it?under
the?terms?of?the?GNU?General?Public?License?as?published?by?the?Free
Software?Foundation;?either?version?2?or?（at?your?option）?any?later
version.

GCC?is?distributed?in?the?hope?that?it?will?be?useful?but?WITHOUT?ANY
WARRANTY;?without?even?the?implied?warranty?of?MERCHANTABILITY?or
FITNESS?FOR?A?PARTICULAR?PURPOSE.??See?the?GNU?General?Public?License
for?more?details.

You?should?have?received?a?copy?of?the?GNU?General?Public?License
along?with?GCC;?see?the?file?COPYING.??If?not?write?to?the?Free
Software?Foundation?51?Franklin?Street?Fifth?Floor?Boston?MA
02110-1301?USA.??*/

#include?“config.h“
#include?“system.h“
#include?“coretypes.h“
#include?“tm.h“
#include?“tree.h“
#include?“flags.h“
#include?“toplev.h“
#include?“output.h“
#include?“rtl.h“
#include?“ggc.h“
#include?“tm_p.h“
#include?“cpplib.h“
#include?“target.h“
#include?“langhooks.h“

static?void?init_attributes?（void）;

/*?Table?of?the?tables?of?attributes?（common?language?format?machine）
???searched.??*/
static?const?struct?attribute_spec?*attribute_tables[4];

static?bool?attributes_initialized?=?false;

/*?Default?empty?table?of?attributes.??*/
static?const?struct?attribute_spec?empty_attribute_table[]?=
{
??{?NULL?0?0?false?false?false?NULL?}
};

/*?Initialize?attribute?tables?and?make?some?sanity?checks
???if?--enable-checking.??*/

static?void
init_attributes?（void）
{
??size_t?i;

??attribute_tables[0]?=?lang_hooks.common_attribute_table;
??attribute_tables[1]?=?lang_hooks.attribute_table;
??attribute_tables[2]?=?lang_hooks.format_attribute_table;
??attribute_tables[3]?=?targetm.attribute_table;

??/*?Translate?NULL?pointers?to?pointers?to?the?empty?table.??*/
??for?（i?=?0;?i?????if?（attribute_tables[i]?==?NULL）
??????attribute_tables[i]?=?empty_attribute_table;

#ifdef?ENABLE_CHECKING
??/*?Make?some?sanity?checks?on?the?attribute?tables.??*/
??for?（i?=?0;?i?????{
??????int?j;

??????for?（j?=?0;?attribute_tables[i][j].name?!=?NULL;?j++）
	{
	??/*?The?name?must?not?begin?and?end?with?__.??*/
	??const?char?*name?=?attribute_tables[i][j].name;
	??int?len?=?strlen?（name）;
	??
	??gcc_assert?（!（name[0]?==?‘_‘?&&?name[1]?==?‘_‘
			&&?name[len?-?1]?==?‘_‘?&&?name[len?-?2]?==?‘_‘））;
	??
	??/*?The?minimum?and?maximum?lengths?must?be?consistent.??*/
	??gcc_assert?（attribute_tables[i][j].min_length?>=?0）;
	??
	??gcc_assert?（attribute_tables[i][j].max_length?==?-1
		??????||?（attribute_tables[i][j].max_length
			??>=?attribute_tables[i][j].min_length））;
	??
	??/*?An?attribute?cannot?require?both?a?DECL?and?a?TYPE.??*/
	??gcc_assert?（!attribute_tables[i][j].decl_required
		??????||?!attribute_tables[i][j].t