[thirdparty/gcc.git] / gcc / attribs.c

/* 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 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, 59 Temple Place - Suite 330, Boston, MA
02111-1307, 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 < ARRAY_SIZE (attribute_tables); 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 < ARRAY_SIZE (attribute_tables); 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].type_required);
	  
	  /* If an attribute requires a function type, in particular
	     it requires a type.  */
	  gcc_assert (!attribute_tables[i][j].function_type_required
		      || attribute_tables[i][j].type_required);
	}
    }

  /* Check that each name occurs just once in each table.  */
  for (i = 0; i < ARRAY_SIZE (attribute_tables); i++)
    {
      int j, k;
      for (j = 0; attribute_tables[i][j].name != NULL; j++)
	for (k = j + 1; attribute_tables[i][k].name != NULL; k++)
	  gcc_assert (strcmp (attribute_tables[i][j].name,
			      attribute_tables[i][k].name));
    }
  /* Check that no name occurs in more than one table.  */
  for (i = 0; i < ARRAY_SIZE (attribute_tables); i++)
    {
      size_t j, k, l;

      for (j = i + 1; j < ARRAY_SIZE (attribute_tables); j++)
	for (k = 0; attribute_tables[i][k].name != NULL; k++)
	  for (l = 0; attribute_tables[j][l].name != NULL; l++)
	    gcc_assert (strcmp (attribute_tables[i][k].name,
				attribute_tables[j][l].name));
    }
#endif

  attributes_initialized = true;
}
\f
/* Process the attributes listed in ATTRIBUTES and install them in *NODE,
   which is either a DECL (including a TYPE_DECL) or a TYPE.  If a DECL,
   it should be modified in place; if a TYPE, a copy should be created
   unless ATTR_FLAG_TYPE_IN_PLACE is set in FLAGS.  FLAGS gives further
   information, in the form of a bitwise OR of flags in enum attribute_flags
   from tree.h.  Depending on these flags, some attributes may be
   returned to be applied at a later stage (for example, to apply
   a decl attribute to the declaration rather than to its type).  */

tree
decl_attributes (tree *node, tree attributes, int flags)
{
  tree a;
  tree returned_attrs = NULL_TREE;

  if (!attributes_initialized)
    init_attributes ();

  targetm.insert_attributes (*node, &attributes);

  for (a = attributes; a; a = TREE_CHAIN (a))
    {
      tree name = TREE_PURPOSE (a);
      tree args = TREE_VALUE (a);
      tree *anode = node;
      const struct attribute_spec *spec = NULL;
      bool no_add_attrs = 0;
      tree fn_ptr_tmp = NULL_TREE;
      size_t i;

      for (i = 0; i < ARRAY_SIZE (attribute_tables); i++)
	{
	  int j;

	  for (j = 0; attribute_tables[i][j].name != NULL; j++)
	    {
	      if (is_attribute_p (attribute_tables[i][j].name, name))
		{
		  spec = &attribute_tables[i][j];
		  break;
		}
	    }
	  if (spec != NULL)
	    break;
	}

      if (spec == NULL)
	{
	  warning (0, "%qs attribute directive ignored",
		   IDENTIFIER_POINTER (name));
	  continue;
	}
      else if (list_length (args) < spec->min_length
	       || (spec->max_length >= 0
		   && list_length (args) > spec->max_length))
	{
	  error ("wrong number of arguments specified for %qs attribute",
		 IDENTIFIER_POINTER (name));
	  continue;
	}

      if (spec->decl_required && !DECL_P (*anode))
	{
	  if (flags & ((int) ATTR_FLAG_DECL_NEXT
		       | (int) ATTR_FLAG_FUNCTION_NEXT
		       | (int) ATTR_FLAG_ARRAY_NEXT))
	    {
	      /* Pass on this attribute to be tried again.  */
	      returned_attrs = tree_cons (name, args, returned_attrs);
	      continue;
	    }
	  else
	    {
	      warning (0, "%qs attribute does not apply to types",
		       IDENTIFIER_POINTER (name));
	      continue;
	    }
	}

      /* If we require a type, but were passed a decl, set up to make a
	 new type and update the one in the decl.  ATTR_FLAG_TYPE_IN_PLACE
	 would have applied if we'd been passed a type, but we cannot modify
	 the decl's type in place here.  */
      if (spec->type_required && DECL_P (*anode))
	{
	  anode = &TREE_TYPE (*anode);
	  flags &= ~(int) ATTR_FLAG_TYPE_IN_PLACE;
	}

      if (spec->function_type_required && TREE_CODE (*anode) != FUNCTION_TYPE
	  && TREE_CODE (*anode) != METHOD_TYPE)
	{
	  if (TREE_CODE (*anode) == POINTER_TYPE
	      && (TREE_CODE (TREE_TYPE (*anode)) == FUNCTION_TYPE
		  || TREE_CODE (TREE_TYPE (*anode)) == METHOD_TYPE))
	    {
	      /* OK, this is a bit convoluted.  We can't just make a copy
		 of the pointer type and modify its TREE_TYPE, because if
		 we change the attributes of the target type the pointer
		 type needs to have a different TYPE_MAIN_VARIANT.  So we
		 pull out the target type now, frob it as appropriate, and
		 rebuild the pointer type later.

	         This would all be simpler if attributes were part of the
	         declarator, grumble grumble.  */
	      fn_ptr_tmp = TREE_TYPE (*anode);
	      anode = &fn_ptr_tmp;
	      flags &= ~(int) ATTR_FLAG_TYPE_IN_PLACE;
	    }
	  else if (flags & (int) ATTR_FLAG_FUNCTION_NEXT)
	    {
	      /* Pass on this attribute to be tried again.  */
	      returned_attrs = tree_cons (name, args, returned_attrs);
	      continue;
	    }

	  if (TREE_CODE (*anode) != FUNCTION_TYPE
	      && TREE_CODE (*anode) != METHOD_TYPE)
	    {
	      warning (0, "%qs attribute only applies to function types",
		       IDENTIFIER_POINTER (name));
	      continue;
	    }
	}

      if (spec->handler != NULL)
	returned_attrs = chainon ((*spec->handler) (anode, name, args,
						    flags, &no_add_attrs),
				  returned_attrs);

      /* Layout the decl in case anything changed.  */
      if (spec->type_required && DECL_P (*node)
	  && (TREE_CODE (*node) == VAR_DECL
	      || TREE_CODE (*node) == PARM_DECL
	      || TREE_CODE (*node) == RESULT_DECL))
	relayout_decl (*node);

      if (!no_add_attrs)
	{
	  tree old_attrs;
	  tree a;

	  if (DECL_P (*anode))
	    old_attrs = DECL_ATTRIBUTES (*anode);
	  else
	    old_attrs = TYPE_ATTRIBUTES (*anode);

	  for (a = lookup_attribute (spec->name, old_attrs);
	       a != NULL_TREE;
	       a = lookup_attribute (spec->name, TREE_CHAIN (a)))
	    {
	      if (simple_cst_equal (TREE_VALUE (a), args) == 1)
		break;
	    }

	  if (a == NULL_TREE)
	    {
	      /* This attribute isn't already in the list.  */
	      if (DECL_P (*anode))
		DECL_ATTRIBUTES (*anode) = tree_cons (name, args, old_attrs);
	      else if (flags & (int) ATTR_FLAG_TYPE_IN_PLACE)
		{
		  TYPE_ATTRIBUTES (*anode) = tree_cons (name, args, old_attrs);
		  /* If this is the main variant, also push the attributes
		     out to the other variants.  */
		  if (*anode == TYPE_MAIN_VARIANT (*anode))
		    {
		      tree variant;
		      for (variant = *anode; variant;
			   variant = TYPE_NEXT_VARIANT (variant))
			{
			  if (TYPE_ATTRIBUTES (variant) == old_attrs)
			    TYPE_ATTRIBUTES (variant)
			      = TYPE_ATTRIBUTES (*anode);
			  else if (!lookup_attribute
				   (spec->name, TYPE_ATTRIBUTES (variant)))
			    TYPE_ATTRIBUTES (variant) = tree_cons
			      (name, args, TYPE_ATTRIBUTES (variant));
			}
		    }
		}
	      else
		*anode = build_type_attribute_variant (*anode,
						       tree_cons (name, args,
								  old_attrs));
	    }
	}

      if (fn_ptr_tmp)
	{
	  /* Rebuild the function pointer type and put it in the
	     appropriate place.  */
	  fn_ptr_tmp = build_pointer_type (fn_ptr_tmp);
	  if (DECL_P (*node))
	    TREE_TYPE (*node) = fn_ptr_tmp;
	  else
	    {
	      gcc_assert (TREE_CODE (*node) == POINTER_TYPE);
	      *node = fn_ptr_tmp;
	    }
	}
    }

  return returned_attrs;
}
Commit	Line	Data
bb9f8221	1	/* Functions dealing with attribute handling, used by most front ends.
2cc2d4bb	2	Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
5fd9b178	3	2002, 2003, 2004 Free Software Foundation, Inc.
bb9f8221 RK	4
	5	This file is part of GCC.
	6
	7	GCC is free software; you can redistribute it and/or modify it under
	8	the terms of the GNU General Public License as published by the Free
	9	Software Foundation; either version 2, or (at your option) any later
	10	version.
	11
	12	GCC is distributed in the hope that it will be useful, but WITHOUT ANY
	13	WARRANTY; without even the implied warranty of MERCHANTABILITY or
	14	FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	15	for more details.
	16
	17	You should have received a copy of the GNU General Public License
	18	along with GCC; see the file COPYING. If not, write to the Free
	19	Software Foundation, 59 Temple Place - Suite 330, Boston, MA
	20	02111-1307, USA. */
	21
	22	#include "config.h"
	23	#include "system.h"
4977bab6 ZW	24	#include "coretypes.h"
4977bab6 ZW	25	#include "tm.h"
bb9f8221 RK	26	#include "tree.h"
	27	#include "flags.h"
	28	#include "toplev.h"
	29	#include "output.h"
	30	#include "rtl.h"
	31	#include "ggc.h"
bb9f8221	32	#include "tm_p.h"
bb9f8221 RK	33	#include "cpplib.h"
bb9f8221 RK	34	#include "target.h"
7ffb4fd2	35	#include "langhooks.h"
bb9f8221	36
4682ae04	37	static void init_attributes (void);
bb9f8221	38
349ae713	39	/* Table of the tables of attributes (common, language, format, machine)
bb9f8221 RK	40	searched. */
	41	static const struct attribute_spec *attribute_tables[4];
	42
	43	static bool attributes_initialized = false;
	44
bb9f8221 RK	45	/* Default empty table of attributes. */
	46	static const struct attribute_spec empty_attribute_table[] =
	47	{
	48	{ NULL, 0, 0, false, false, false, NULL }
	49	};
	50
bb9f8221 RK	51	/* Initialize attribute tables, and make some sanity checks
	52	if --enable-checking. */
	53
	54	static void
4682ae04	55	init_attributes (void)
bb9f8221	56	{
ca7558fc	57	size_t i;
bb9f8221	58
349ae713 NB	59	attribute_tables[0] = lang_hooks.common_attribute_table;
	60	attribute_tables[1] = lang_hooks.attribute_table;
	61	attribute_tables[2] = lang_hooks.format_attribute_table;
bb9f8221 RK	62	attribute_tables[3] = targetm.attribute_table;
bb9f8221 RK	63
349ae713 NB	64	/* Translate NULL pointers to pointers to the empty table. */
	65	for (i = 0; i < ARRAY_SIZE (attribute_tables); i++)
	66	if (attribute_tables[i] == NULL)
	67	attribute_tables[i] = empty_attribute_table;
	68
bb9f8221 RK	69	#ifdef ENABLE_CHECKING
bb9f8221 RK	70	/* Make some sanity checks on the attribute tables. */
ca7558fc	71	for (i = 0; i < ARRAY_SIZE (attribute_tables); i++)
bb9f8221 RK	72	{
	73	int j;
	74
	75	for (j = 0; attribute_tables[i][j].name != NULL; j++)
	76	{
	77	/* The name must not begin and end with __. */
	78	const char *name = attribute_tables[i][j].name;
	79	int len = strlen (name);
298e6adc NS	80
	81	gcc_assert (!(name[0] == '_' && name[1] == '_'
	82	&& name[len - 1] == '_' && name[len - 2] == '_'));
	83
bb9f8221	84	/* The minimum and maximum lengths must be consistent. */
298e6adc NS	85	gcc_assert (attribute_tables[i][j].min_length >= 0);
	86
	87	gcc_assert (attribute_tables[i][j].max_length == -1
	88	\|\| (attribute_tables[i][j].max_length
	89	>= attribute_tables[i][j].min_length));
	90
bb9f8221	91	/* An attribute cannot require both a DECL and a TYPE. */
298e6adc NS	92	gcc_assert (!attribute_tables[i][j].decl_required
	93	\|\| !attribute_tables[i][j].type_required);
	94
bb9f8221 RK	95	/* If an attribute requires a function type, in particular
bb9f8221 RK	96	it requires a type. */
298e6adc NS	97	gcc_assert (!attribute_tables[i][j].function_type_required
298e6adc NS	98	\|\| attribute_tables[i][j].type_required);
bb9f8221 RK	99	}
	100	}
	101
	102	/* Check that each name occurs just once in each table. */
ca7558fc	103	for (i = 0; i < ARRAY_SIZE (attribute_tables); i++)
bb9f8221 RK	104	{
	105	int j, k;
	106	for (j = 0; attribute_tables[i][j].name != NULL; j++)
	107	for (k = j + 1; attribute_tables[i][k].name != NULL; k++)
298e6adc NS	108	gcc_assert (strcmp (attribute_tables[i][j].name,
298e6adc NS	109	attribute_tables[i][k].name));
bb9f8221 RK	110	}
bb9f8221 RK	111	/* Check that no name occurs in more than one table. */
ca7558fc	112	for (i = 0; i < ARRAY_SIZE (attribute_tables); i++)
bb9f8221	113	{
ca7558fc	114	size_t j, k, l;
bb9f8221	115
ca7558fc	116	for (j = i + 1; j < ARRAY_SIZE (attribute_tables); j++)
bb9f8221 RK	117	for (k = 0; attribute_tables[i][k].name != NULL; k++)
bb9f8221 RK	118	for (l = 0; attribute_tables[j][l].name != NULL; l++)
298e6adc NS	119	gcc_assert (strcmp (attribute_tables[i][k].name,
298e6adc NS	120	attribute_tables[j][l].name));
bb9f8221 RK	121	}
	122	#endif
	123
	124	attributes_initialized = true;
	125	}
	126	\f
	127	/* Process the attributes listed in ATTRIBUTES and install them in *NODE,
	128	which is either a DECL (including a TYPE_DECL) or a TYPE. If a DECL,
	129	it should be modified in place; if a TYPE, a copy should be created
	130	unless ATTR_FLAG_TYPE_IN_PLACE is set in FLAGS. FLAGS gives further
	131	information, in the form of a bitwise OR of flags in enum attribute_flags
	132	from tree.h. Depending on these flags, some attributes may be
	133	returned to be applied at a later stage (for example, to apply
03aa99d4	134	a decl attribute to the declaration rather than to its type). */
bb9f8221 RK	135
bb9f8221 RK	136	tree
4682ae04	137	decl_attributes (tree *node, tree attributes, int flags)
bb9f8221 RK	138	{
	139	tree a;
	140	tree returned_attrs = NULL_TREE;
	141
	142	if (!attributes_initialized)
	143	init_attributes ();
	144
5fd9b178	145	targetm.insert_attributes (*node, &attributes);
bb9f8221 RK	146
	147	for (a = attributes; a; a = TREE_CHAIN (a))
	148	{
	149	tree name = TREE_PURPOSE (a);
	150	tree args = TREE_VALUE (a);
	151	tree *anode = node;
	152	const struct attribute_spec *spec = NULL;
	153	bool no_add_attrs = 0;
3acef2ae	154	tree fn_ptr_tmp = NULL_TREE;
2b03d201	155	size_t i;
bb9f8221	156
ca7558fc	157	for (i = 0; i < ARRAY_SIZE (attribute_tables); i++)
bb9f8221 RK	158	{
	159	int j;
	160
	161	for (j = 0; attribute_tables[i][j].name != NULL; j++)
	162	{
	163	if (is_attribute_p (attribute_tables[i][j].name, name))
	164	{
	165	spec = &attribute_tables[i][j];
	166	break;
	167	}
	168	}
	169	if (spec != NULL)
	170	break;
	171	}
	172
	173	if (spec == NULL)
	174	{
d4ee4d25	175	warning (0, "%qs attribute directive ignored",
bb9f8221 RK	176	IDENTIFIER_POINTER (name));
	177	continue;
	178	}
	179	else if (list_length (args) < spec->min_length
	180	\|\| (spec->max_length >= 0
	181	&& list_length (args) > spec->max_length))
	182	{
971801ff	183	error ("wrong number of arguments specified for %qs attribute",
bb9f8221 RK	184	IDENTIFIER_POINTER (name));
	185	continue;
	186	}
	187
	188	if (spec->decl_required && !DECL_P (*anode))
	189	{
	190	if (flags & ((int) ATTR_FLAG_DECL_NEXT
	191	\| (int) ATTR_FLAG_FUNCTION_NEXT
	192	\| (int) ATTR_FLAG_ARRAY_NEXT))
	193	{
	194	/* Pass on this attribute to be tried again. */
	195	returned_attrs = tree_cons (name, args, returned_attrs);
	196	continue;
	197	}
	198	else
	199	{
d4ee4d25	200	warning (0, "%qs attribute does not apply to types",
bb9f8221 RK	201	IDENTIFIER_POINTER (name));
	202	continue;
	203	}
	204	}
	205
dd4dc3cd RK	206	/* If we require a type, but were passed a decl, set up to make a
	207	new type and update the one in the decl. ATTR_FLAG_TYPE_IN_PLACE
	208	would have applied if we'd been passed a type, but we cannot modify
	209	the decl's type in place here. */
bb9f8221	210	if (spec->type_required && DECL_P (*anode))
dd4dc3cd RK	211	{
	212	anode = &TREE_TYPE (*anode);
	213	flags &= ~(int) ATTR_FLAG_TYPE_IN_PLACE;
	214	}
bb9f8221 RK	215
	216	if (spec->function_type_required && TREE_CODE (*anode) != FUNCTION_TYPE
	217	&& TREE_CODE (*anode) != METHOD_TYPE)
	218	{
	219	if (TREE_CODE (*anode) == POINTER_TYPE
	220	&& (TREE_CODE (TREE_TYPE (*anode)) == FUNCTION_TYPE
	221	\|\| TREE_CODE (TREE_TYPE (*anode)) == METHOD_TYPE))
	222	{
3acef2ae JM	223	/* OK, this is a bit convoluted. We can't just make a copy
	224	of the pointer type and modify its TREE_TYPE, because if
	225	we change the attributes of the target type the pointer
	226	type needs to have a different TYPE_MAIN_VARIANT. So we
	227	pull out the target type now, frob it as appropriate, and
	228	rebuild the pointer type later.
	229
	230	This would all be simpler if attributes were part of the
	231	declarator, grumble grumble. */
	232	fn_ptr_tmp = TREE_TYPE (*anode);
	233	anode = &fn_ptr_tmp;
	234	flags &= ~(int) ATTR_FLAG_TYPE_IN_PLACE;
bb9f8221 RK	235	}
	236	else if (flags & (int) ATTR_FLAG_FUNCTION_NEXT)
	237	{
	238	/* Pass on this attribute to be tried again. */
	239	returned_attrs = tree_cons (name, args, returned_attrs);
	240	continue;
	241	}
	242
	243	if (TREE_CODE (*anode) != FUNCTION_TYPE
	244	&& TREE_CODE (*anode) != METHOD_TYPE)
	245	{
d4ee4d25	246	warning (0, "%qs attribute only applies to function types",
bb9f8221 RK	247	IDENTIFIER_POINTER (name));
	248	continue;
	249	}
	250	}
	251
	252	if (spec->handler != NULL)
	253	returned_attrs = chainon ((*spec->handler) (anode, name, args,
	254	flags, &no_add_attrs),
	255	returned_attrs);
1b9191d2 AH	256
	257	/* Layout the decl in case anything changed. */
	258	if (spec->type_required && DECL_P (*node)
67282790 JM	259	&& (TREE_CODE (*node) == VAR_DECL
	260	\|\| TREE_CODE (*node) == PARM_DECL
	261	\|\| TREE_CODE (*node) == RESULT_DECL))
d1838621	262	relayout_decl (*node);
1b9191d2	263
bb9f8221 RK	264	if (!no_add_attrs)
	265	{
	266	tree old_attrs;
	267	tree a;
	268
	269	if (DECL_P (*anode))
	270	old_attrs = DECL_ATTRIBUTES (*anode);
	271	else
	272	old_attrs = TYPE_ATTRIBUTES (*anode);
	273
	274	for (a = lookup_attribute (spec->name, old_attrs);
	275	a != NULL_TREE;
	276	a = lookup_attribute (spec->name, TREE_CHAIN (a)))
	277	{
	278	if (simple_cst_equal (TREE_VALUE (a), args) == 1)
	279	break;
	280	}
	281
	282	if (a == NULL_TREE)
	283	{
	284	/* This attribute isn't already in the list. */
	285	if (DECL_P (*anode))
	286	DECL_ATTRIBUTES (*anode) = tree_cons (name, args, old_attrs);
	287	else if (flags & (int) ATTR_FLAG_TYPE_IN_PLACE)
67214984 JM	288	{
	289	TYPE_ATTRIBUTES (*anode) = tree_cons (name, args, old_attrs);
	290	/* If this is the main variant, also push the attributes
	291	out to the other variants. */
	292	if (anode == TYPE_MAIN_VARIANT (anode))
	293	{
	294	tree variant;
	295	for (variant = *anode; variant;
	296	variant = TYPE_NEXT_VARIANT (variant))
	297	{
	298	if (TYPE_ATTRIBUTES (variant) == old_attrs)
	299	TYPE_ATTRIBUTES (variant)
	300	= TYPE_ATTRIBUTES (*anode);
	301	else if (!lookup_attribute
	302	(spec->name, TYPE_ATTRIBUTES (variant)))
	303	TYPE_ATTRIBUTES (variant) = tree_cons
	304	(name, args, TYPE_ATTRIBUTES (variant));
	305	}
	306	}
	307	}
bb9f8221 RK	308	else
	309	anode = build_type_attribute_variant (anode,
	310	tree_cons (name, args,
	311	old_attrs));
	312	}
	313	}
3acef2ae JM	314
	315	if (fn_ptr_tmp)
	316	{
	317	/* Rebuild the function pointer type and put it in the
	318	appropriate place. */
	319	fn_ptr_tmp = build_pointer_type (fn_ptr_tmp);
	320	if (DECL_P (*node))
	321	TREE_TYPE (*node) = fn_ptr_tmp;
3acef2ae	322	else
298e6adc NS	323	{
	324	gcc_assert (TREE_CODE (*node) == POINTER_TYPE);
	325	*node = fn_ptr_tmp;
	326	}
3acef2ae	327	}
bb9f8221 RK	328	}
	329
	330	return returned_attrs;
	331	}