attribs.c: New file, from c-common.c.

	* attribs.c: New file, from c-common.c.
	(attribute_tables): Now four elements.
	(format_attribute_table, lang_attribute_common): New variables.
	(init_attributes): Reflect above changes.
	(handle_mode_attribute): Delete check for wider than uintmax.
	* c-common.c: Delete parts moved to attribs.c.
	(enum attrs): Deleted; unused.
	(c_format_attribute_table): New variable.
	(c_common_lang_init): Initialize format_attribute_table with it.
	* c-common.h (decl_attributes): Remove decl.
	* tree.h (decl_attribute): Move it to here.
	* Makefile.in (C_AND_OBJS_OBJS): Add attribs.o.
	(attribs.o): New rule.
	* ch/Make-lang.in (cc1chill): Add attribs.o.
	* cp/Make-lang.in (CXX_C_OBJS): Add attribs.o.

From-SVN: r45749

1 files changed, 15 insertions, 1145 deletions

diff --git a/gcc/c-common.c b/gcc/c-common.c
index 3aa402f..fd1aef1 100644
--- a/gcc/c-common.c
+++ b/gcc/c-common.c
@@ -216,12 +216,6 @@ void (*back_end_hook) PARAMS ((tree));
    This is a count, since unevaluated expressions can nest.  */
 int skip_evaluation;
 
-enum attrs {A_PACKED, A_NOCOMMON, A_COMMON, A_NORETURN, A_CONST, A_T_UNION,
-	    A_NO_CHECK_MEMORY_USAGE, A_NO_INSTRUMENT_FUNCTION,
-	    A_CONSTRUCTOR, A_DESTRUCTOR, A_MODE, A_SECTION, A_ALIGNED,
-	    A_UNUSED, A_FORMAT, A_FORMAT_ARG, A_WEAK, A_ALIAS, A_MALLOC,
-	    A_NO_LIMIT_STACK, A_PURE};
-
 /* Information about how a function name is generated.  */
 struct fname_var_t
 {
@@ -243,7 +237,6 @@ const struct fname_var_t fname_vars[] =
   {NULL, 0, 0},
 };
 
-static void init_attributes		PARAMS ((void));
 static int constant_fits_type_p		PARAMS ((tree, tree));
 
 /* Keep a stack of if statements.  We record the number of compound
@@ -637,1144 +630,6 @@ combine_strings (strings)
   return value;
 }
 
-/* Table of the tables of attributes (common, language, machine) searched.  */
-static const struct attribute_spec *attribute_tables[3];
-
-static bool attributes_initialized = false;
-
-static tree handle_packed_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_nocommon_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_common_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_noreturn_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_unused_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_const_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_transparent_union_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_constructor_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_destructor_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_mode_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_section_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_aligned_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_weak_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_alias_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_no_instrument_function_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_no_check_memory_usage_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_malloc_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_no_limit_stack_attribute PARAMS ((tree *, tree, tree, int, bool *));
-static tree handle_pure_attribute PARAMS ((tree *, tree, tree, int, bool *));
-
-/* Table of machine-independent attributes common to all C-like languages.  */
-static const struct attribute_spec c_common_attribute_table[] =
-{
-  /* { name, min_len, max_len, decl_req, type_req, fn_type_req, handler } */
-  { "packed",                 0, 0, false, false, false,
-      			      handle_packed_attribute },
-  { "nocommon",               0, 0, true,  false, false,
-			      handle_nocommon_attribute },
-  { "common",                 0, 0, true,  false, false,
-			      handle_common_attribute },
-  /* FIXME: logically, noreturn attributes should be listed as
-     "false, true, true" and apply to function types.  But implementing this
-     would require all the places in the compiler that use TREE_THIS_VOLATILE
-     on a decl to identify non-returning functions to be located and fixed
-     to check the function type instead.  */
-  { "noreturn",               0, 0, true,  false, false,
-			      handle_noreturn_attribute },
-  { "volatile",               0, 0, true,  false, false,
-			      handle_noreturn_attribute },
-  { "unused",                 0, 0, false, false, false,
-			      handle_unused_attribute },
-  /* The same comments as for noreturn attributes apply to const ones.  */
-  { "const",                  0, 0, true,  false, false,
-			      handle_const_attribute },
-  { "transparent_union",      0, 0, false, false, false,
-			      handle_transparent_union_attribute },
-  { "constructor",            0, 0, true,  false, false,
-			      handle_constructor_attribute },
-  { "destructor",             0, 0, true,  false, false,
-			      handle_destructor_attribute },
-  { "mode",                   1, 1, true,  false, false,
-			      handle_mode_attribute },
-  { "section",                1, 1, true,  false, false,
-			      handle_section_attribute },
-  { "aligned",                0, 1, false, false, false,
-			      handle_aligned_attribute },
-  { "format",                 3, 3, true,  false, false,
-			      handle_format_attribute },
-  { "format_arg",             1, 1, true,  false, false,
-			      handle_format_arg_attribute },
-  { "weak",                   0, 0, true,  false, false,
-			      handle_weak_attribute },
-  { "alias",                  1, 1, true,  false, false,
-			      handle_alias_attribute },
-  { "no_instrument_function", 0, 0, true,  false, false,
-			      handle_no_instrument_function_attribute },
-  { "no_check_memory_usage",  0, 0, true,  false, false,
-			      handle_no_check_memory_usage_attribute },
-  { "malloc",                 0, 0, true,  false, false,
-			      handle_malloc_attribute },
-  { "no_stack_limit",         0, 0, true,  false, false,
-			      handle_no_limit_stack_attribute },
-  { "pure",                   0, 0, true,  false, false,
-			      handle_pure_attribute },
-  { NULL,                     0, 0, false, false, false, NULL }
-};
-
-/* Default empty table of language attributes.  */
-static const struct attribute_spec default_lang_attribute_table[] =
-{
-  { NULL, 0, 0, false, false, false, NULL }
-};
-
-/* Table of machine-independent attributes for a particular language.  */
-const struct attribute_spec *lang_attribute_table
-  = default_lang_attribute_table;
-
-/* Initialize attribute tables, and make some sanity checks
-   if --enable-checking.  */
-
-static void
-init_attributes ()
-{
-#ifdef ENABLE_CHECKING
-  int i;
-#endif
-  attribute_tables[0] = c_common_attribute_table;
-  attribute_tables[1] = lang_attribute_table;
-  attribute_tables[2] = targetm.attribute_table;
-#ifdef ENABLE_CHECKING
-  /* Make some sanity checks on the attribute tables.  */
-  for (i = 0;
-       i < (int) (sizeof (attribute_tables) / sizeof (attribute_tables[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);
-	  if (name[0] == '_' && name[1] == '_'
-	      && name[len - 1] == '_' && name[len - 2] == '_')
-	    abort ();
-	  /* The minimum and maximum lengths must be consistent.  */
-	  if (attribute_tables[i][j].min_length < 0)
-	    abort ();
-	  if (attribute_tables[i][j].max_length != -1
-	      && attribute_tables[i][j].max_length < attribute_tables[i][j].min_length)
-	    abort ();
-	  /* An attribute cannot require both a DECL and a TYPE.  */
-	  if (attribute_tables[i][j].decl_required
-	      && attribute_tables[i][j].type_required)
-	    abort ();
-	  /* If an attribute requires a function type, in particular
-	     it requires a type.  */
-	  if (attribute_tables[i][j].function_type_required
-	      && !attribute_tables[i][j].type_required)
-	    abort ();
-	}
-    }
-  /* Check that each name occurs just once in each table.  */
-  for (i = 0;
-       i < (int) (sizeof (attribute_tables) / sizeof (attribute_tables[0]));
-       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++)
-	  if (!strcmp (attribute_tables[i][j].name,
-		       attribute_tables[i][k].name))
-	    abort ();
-    }
-  /* Check that no name occurs in more than one table.  */
-  for (i = 0;
-       i < (int) (sizeof (attribute_tables) / sizeof (attribute_tables[0]));
-       i++)
-    {
-      int j;
-      for (j = i + 1;
-	   j < (int) (sizeof (attribute_tables) / sizeof (attribute_tables[0]));
-	   j++)
-	{
-	  int k, l;
-	  for (k = 0; attribute_tables[i][k].name != NULL; k++)
-	    for (l = 0; attribute_tables[j][l].name != NULL; l++)
-	      if (!strcmp (attribute_tables[i][k].name,
-			   attribute_tables[j][l].name))
-		abort ();
-	}
-    }
-#endif
-  attributes_initialized = true;
-}
-
-/* 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 (node, attributes, flags)
-     tree *node, 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;
-      int i;
-
-      for (i = 0;
-	   i < (int) (sizeof (attribute_tables) / sizeof (attribute_tables[0]));
-	   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 ("`%s' 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 `%s' 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 ("`%s' attribute does not apply to types",
-		       IDENTIFIER_POINTER (name));
-	      continue;
-	    }
-	}
-
-      if (spec->type_required && DECL_P (*anode))
-	{
-	  anode = &TREE_TYPE (*anode);
-	}
-
-      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))
-	    {
-	      if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
-		*anode = build_type_copy (*anode);
-	      anode = &TREE_TYPE (*anode);
-	    }
-	  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 ("`%s' 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);
-      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);
-	      else
-		*anode = build_type_attribute_variant (*anode,
-						       tree_cons (name, args,
-								  old_attrs));
-	    }
-	}
-    }
-
-  return returned_attrs;
-}
-
-/* Handle a "packed" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_packed_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags;
-     bool *no_add_attrs;
-{
-  tree *type = NULL;
-  if (DECL_P (*node))
-    {
-      if (TREE_CODE (*node) == TYPE_DECL)
-	type = &TREE_TYPE (*node);
-    }
-  else
-    type = node;
-  if (type)
-    {
-      if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
-	*type = build_type_copy (*type);
-      TYPE_PACKED (*type) = 1;
-    }
-  else if (TREE_CODE (*node) == FIELD_DECL)
-    DECL_PACKED (*node) = 1;
-  /* We can't set DECL_PACKED for a VAR_DECL, because the bit is
-     used for DECL_REGISTER.  It wouldn't mean anything anyway.  */
-  else
-    {
-      warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "nocommon" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_nocommon_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  if (TREE_CODE (*node) == VAR_DECL)
-    DECL_COMMON (*node) = 0;
-  else
-    {
-      warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "common" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_common_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  if (TREE_CODE (*node) == VAR_DECL)
-    DECL_COMMON (*node) = 1;
-  else
-    {
-      warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "noreturn" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_noreturn_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  tree type = TREE_TYPE (*node);
-
-  /* See FIXME comment in c_common_attribute_table.  */
-  if (TREE_CODE (*node) == FUNCTION_DECL)
-    TREE_THIS_VOLATILE (*node) = 1;
-  else if (TREE_CODE (type) == POINTER_TYPE
-	   && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
-    TREE_TYPE (*node)
-      = build_pointer_type (build_type_variant (TREE_TYPE (type),
-						TREE_READONLY (TREE_TYPE (type)), 1));
-  else
-    {
-      warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "unused" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_unused_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags;
-     bool *no_add_attrs;
-{
-  if (DECL_P (*node))
-    {
-      tree decl = *node;
-
-      if (TREE_CODE (decl) == PARM_DECL
-	  || TREE_CODE (decl) == VAR_DECL
-	  || TREE_CODE (decl) == FUNCTION_DECL
-	  || TREE_CODE (decl) == LABEL_DECL
-	  || TREE_CODE (decl) == TYPE_DECL)
-	TREE_USED (decl) = 1;
-      else
-	{
-	  warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-	  *no_add_attrs = true;
-	}
-    }
-  else
-    {
-      if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
-	*node = build_type_copy (*node);
-      TREE_USED (*node) = 1;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "const" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_const_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  tree type = TREE_TYPE (*node);
-
-  /* See FIXME comment on noreturn in c_common_attribute_table.  */
-  if (TREE_CODE (*node) == FUNCTION_DECL)
-    TREE_READONLY (*node) = 1;
-  else if (TREE_CODE (type) == POINTER_TYPE
-	   && TREE_CODE (TREE_TYPE (type)) == FUNCTION_TYPE)
-    TREE_TYPE (*node)
-      = build_pointer_type (build_type_variant (TREE_TYPE (type), 1,
-						TREE_THIS_VOLATILE (TREE_TYPE (type))));
-  else
-    {
-      warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "transparent_union" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_transparent_union_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags;
-     bool *no_add_attrs;
-{
-  tree decl = NULL_TREE;
-  tree *type = NULL;
-  int is_type = 0;
-
-  if (DECL_P (*node))
-    {
-      decl = *node;
-      type = &TREE_TYPE (decl);
-      is_type = TREE_CODE (*node) == TYPE_DECL;
-    }
-  else if (TYPE_P (*node))
-    type = node, is_type = 1;
-
-  if (is_type
-      && TREE_CODE (*type) == UNION_TYPE
-      && (decl == 0
-	  || (TYPE_FIELDS (*type) != 0
-	      && TYPE_MODE (*type) == DECL_MODE (TYPE_FIELDS (*type)))))
-    {
-      if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
-	*type = build_type_copy (*type);
-      TYPE_TRANSPARENT_UNION (*type) = 1;
-    }
-  else if (decl != 0 && TREE_CODE (decl) == PARM_DECL
-	   && TREE_CODE (*type) == UNION_TYPE
-	   && TYPE_MODE (*type) == DECL_MODE (TYPE_FIELDS (*type)))
-    DECL_TRANSPARENT_UNION (decl) = 1;
-  else
-    {
-      warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "constructor" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_constructor_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  tree decl = *node;
-  tree type = TREE_TYPE (decl);
-
-  if (TREE_CODE (decl) == FUNCTION_DECL
-      && TREE_CODE (type) == FUNCTION_TYPE
-      && decl_function_context (decl) == 0)
-    {
-      DECL_STATIC_CONSTRUCTOR (decl) = 1;
-      TREE_USED (decl) = 1;
-    }
-  else
-    {
-      warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "destructor" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_destructor_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  tree decl = *node;
-  tree type = TREE_TYPE (decl);
-
-  if (TREE_CODE (decl) == FUNCTION_DECL
-      && TREE_CODE (type) == FUNCTION_TYPE
-      && decl_function_context (decl) == 0)
-    {
-      DECL_STATIC_DESTRUCTOR (decl) = 1;
-      TREE_USED (decl) = 1;
-    }
-  else
-    {
-      warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "mode" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_mode_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  tree decl = *node;
-  tree type = TREE_TYPE (decl);
-
-  *no_add_attrs = true;
-
-  if (TREE_CODE (TREE_VALUE (args)) != IDENTIFIER_NODE)
-    warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-  else
-    {
-      int j;
-      const char *p = IDENTIFIER_POINTER (TREE_VALUE (args));
-      int len = strlen (p);
-      enum machine_mode mode = VOIDmode;
-      tree typefm;
-
-      if (len > 4 && p[0] == '_' && p[1] == '_'
-	  && p[len - 1] == '_' && p[len - 2] == '_')
-	{
-	  char *newp = (char *) alloca (len - 1);
-
-	  strcpy (newp, &p[2]);
-	  newp[len - 4] = '\0';
-	  p = newp;
-	}
-
-      /* Give this decl a type with the specified mode.
-	 First check for the special modes.  */
-      if (! strcmp (p, "byte"))
-	mode = byte_mode;
-      else if (!strcmp (p, "word"))
-	mode = word_mode;
-      else if (! strcmp (p, "pointer"))
-	mode = ptr_mode;
-      else
-	for (j = 0; j < NUM_MACHINE_MODES; j++)
-	  if (!strcmp (p, GET_MODE_NAME (j)))
-	    mode = (enum machine_mode) j;
-
-      if (mode == VOIDmode)
-	error ("unknown machine mode `%s'", p);
-      else if (0 == (typefm = type_for_mode (mode,
-					     TREE_UNSIGNED (type))))
-	error ("no data type for mode `%s'", p);
-      else
-	{
-	  if (TYPE_PRECISION (typefm) > (TREE_UNSIGNED (type)
-					 ? TYPE_PRECISION(uintmax_type_node)
-					 : TYPE_PRECISION(intmax_type_node))
-	      && pedantic)
-	    pedwarn ("type with more precision than %s",
-		     TREE_UNSIGNED (type) ? "uintmax_t" : "intmax_t");
-	  TREE_TYPE (decl) = type = typefm;
-	  DECL_SIZE (decl) = DECL_SIZE_UNIT (decl) = 0;
-	  if (TREE_CODE (decl) != FIELD_DECL)
-	    layout_decl (decl, 0);
-	}
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "section" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_section_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name ATTRIBUTE_UNUSED;
-     tree args;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  tree decl = *node;
-
-  if (targetm.have_named_sections)
-    {
-      if ((TREE_CODE (decl) == FUNCTION_DECL
-	   || TREE_CODE (decl) == VAR_DECL)
-	  && TREE_CODE (TREE_VALUE (args)) == STRING_CST)
-	{
-	  if (TREE_CODE (decl) == VAR_DECL
-	      && current_function_decl != NULL_TREE
-	      && ! TREE_STATIC (decl))
-	    {
-	      error_with_decl (decl,
-			       "section attribute cannot be specified for local variables");
-	      *no_add_attrs = true;
-	    }
-	  /* The decl may have already been given a section attribute
-	     from a previous declaration.  Ensure they match.  */
-	  else if (DECL_SECTION_NAME (decl) != NULL_TREE
-		   && strcmp (TREE_STRING_POINTER (DECL_SECTION_NAME (decl)),
-			      TREE_STRING_POINTER (TREE_VALUE (args))) != 0)
-	    {
-	      error_with_decl (*node,
-			       "section of `%s' conflicts with previous declaration");
-	      *no_add_attrs = true;
-	    }
-	  else
-	    DECL_SECTION_NAME (decl) = TREE_VALUE (args);
-	}
-      else
-	{
-	  error_with_decl (*node,
-			   "section attribute not allowed for `%s'");
-	  *no_add_attrs = true;
-	}
-    }
-  else
-    {
-      error_with_decl (*node,
-		       "section attributes are not supported for this target");
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "aligned" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_aligned_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name ATTRIBUTE_UNUSED;
-     tree args;
-     int flags;
-     bool *no_add_attrs;
-{
-  tree decl = NULL_TREE;
-  tree *type = NULL;
-  int is_type = 0;
-  tree align_expr = (args ? TREE_VALUE (args)
-		     : size_int (BIGGEST_ALIGNMENT / BITS_PER_UNIT));
-  int i;
-
-  if (DECL_P (*node))
-    {
-      decl = *node;
-      type = &TREE_TYPE (decl);
-      is_type = TREE_CODE (*node) == TYPE_DECL;
-    }
-  else if (TYPE_P (*node))
-    type = node, is_type = 1;
-
-  /* Strip any NOPs of any kind.  */
-  while (TREE_CODE (align_expr) == NOP_EXPR
-	 || TREE_CODE (align_expr) == CONVERT_EXPR
-	 || TREE_CODE (align_expr) == NON_LVALUE_EXPR)
-    align_expr = TREE_OPERAND (align_expr, 0);
-
-  if (TREE_CODE (align_expr) != INTEGER_CST)
-    {
-      error ("requested alignment is not a constant");
-      *no_add_attrs = true;
-    }
-  else if ((i = tree_log2 (align_expr)) == -1)
-    {
-      error ("requested alignment is not a power of 2");
-      *no_add_attrs = true;
-    }
-  else if (i > HOST_BITS_PER_INT - 2)
-    {
-      error ("requested alignment is too large");
-      *no_add_attrs = true;
-    }
-  else if (is_type)
-    {
-      /* If we have a TYPE_DECL, then copy the type, so that we
-	 don't accidentally modify a builtin type.  See pushdecl.  */
-      if (decl && TREE_TYPE (decl) != error_mark_node
-	  && DECL_ORIGINAL_TYPE (decl) == NULL_TREE)
-	{
-	  tree tt = TREE_TYPE (decl);
-	  *type = build_type_copy (*type);
-	  DECL_ORIGINAL_TYPE (decl) = tt;
-	  TYPE_NAME (*type) = decl;
-	  TREE_USED (*type) = TREE_USED (decl);
-	  TREE_TYPE (decl) = *type;
-	}
-      else if (!(flags & (int) ATTR_FLAG_TYPE_IN_PLACE))
-	*type = build_type_copy (*type);
-
-      TYPE_ALIGN (*type) = (1 << i) * BITS_PER_UNIT;
-      TYPE_USER_ALIGN (*type) = 1;
-    }
-  else if (TREE_CODE (decl) != VAR_DECL
-	   && TREE_CODE (decl) != FIELD_DECL)
-    {
-      error_with_decl (decl,
-		       "alignment may not be specified for `%s'");
-      *no_add_attrs = true;
-    }
-  else
-    {
-      DECL_ALIGN (decl) = (1 << i) * BITS_PER_UNIT;
-      DECL_USER_ALIGN (decl) = 1;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "weak" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_weak_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name ATTRIBUTE_UNUSED;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs ATTRIBUTE_UNUSED;
-{
-  declare_weak (*node);
-
-  return NULL_TREE;
-}
-
-/* Handle an "alias" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_alias_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  tree decl = *node;
-
-  if ((TREE_CODE (decl) == FUNCTION_DECL && DECL_INITIAL (decl))
-      || (TREE_CODE (decl) != FUNCTION_DECL && ! DECL_EXTERNAL (decl)))
-    {
-      error_with_decl (decl,
-		       "`%s' defined both normally and as an alias");
-      *no_add_attrs = true;
-    }
-  else if (decl_function_context (decl) == 0)
-    {
-      tree id;
-
-      id = TREE_VALUE (args);
-      if (TREE_CODE (id) != STRING_CST)
-	{
-	  error ("alias arg not a string");
-	  *no_add_attrs = true;
-	  return NULL_TREE;
-	}
-      id = get_identifier (TREE_STRING_POINTER (id));
-      /* This counts as a use of the object pointed to.  */
-      TREE_USED (id) = 1;
-
-      if (TREE_CODE (decl) == FUNCTION_DECL)
-	DECL_INITIAL (decl) = error_mark_node;
-      else
-	DECL_EXTERNAL (decl) = 0;
-      assemble_alias (decl, id);
-    }
-  else
-    {
-      warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "no_instrument_function" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_no_instrument_function_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  tree decl = *node;
-
-  if (TREE_CODE (decl) != FUNCTION_DECL)
-    {
-      error_with_decl (decl,
-		       "`%s' attribute applies only to functions",
-		       IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-  else if (DECL_INITIAL (decl))
-    {
-      error_with_decl (decl,
-		       "can't set `%s' attribute after definition",
-		       IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-  else
-    DECL_NO_INSTRUMENT_FUNCTION_ENTRY_EXIT (decl) = 1;
-
-  return NULL_TREE;
-}
-
-/* Handle a "no_check_memory_usage" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_no_check_memory_usage_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  tree decl = *node;
-
-  if (TREE_CODE (decl) != FUNCTION_DECL)
-    {
-      error_with_decl (decl,
-		       "`%s' attribute applies only to functions",
-		       IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-  else if (DECL_INITIAL (decl))
-    {
-      error_with_decl (decl,
-		       "can't set `%s' attribute after definition",
-		       IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-  else
-    DECL_NO_CHECK_MEMORY_USAGE (decl) = 1;
-
-  return NULL_TREE;
-}
-
-/* Handle a "malloc" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_malloc_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  if (TREE_CODE (*node) == FUNCTION_DECL)
-    DECL_IS_MALLOC (*node) = 1;
-  /* ??? TODO: Support types.  */
-  else
-    {
-      warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Handle a "no_limit_stack" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_no_limit_stack_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  tree decl = *node;
-
-  if (TREE_CODE (decl) != FUNCTION_DECL)
-    {
-      error_with_decl (decl,
-		       "`%s' attribute applies only to functions",
-		       IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-  else if (DECL_INITIAL (decl))
-    {
-      error_with_decl (decl,
-		       "can't set `%s' attribute after definition",
-		       IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-  else
-    DECL_NO_LIMIT_STACK (decl) = 1;
-
-  return NULL_TREE;
-}
-
-/* Handle a "pure" attribute; arguments as in
-   struct attribute_spec.handler.  */
-
-static tree
-handle_pure_attribute (node, name, args, flags, no_add_attrs)
-     tree *node;
-     tree name;
-     tree args ATTRIBUTE_UNUSED;
-     int flags ATTRIBUTE_UNUSED;
-     bool *no_add_attrs;
-{
-  if (TREE_CODE (*node) == FUNCTION_DECL)
-    DECL_IS_PURE (*node) = 1;
-  /* ??? TODO: Support types.  */
-  else
-    {
-      warning ("`%s' attribute ignored", IDENTIFIER_POINTER (name));
-      *no_add_attrs = true;
-    }
-
-  return NULL_TREE;
-}
-
-/* Split SPECS_ATTRS, a list of declspecs and prefix attributes, into two
-   lists.  SPECS_ATTRS may also be just a typespec (eg: RECORD_TYPE).
-
-   The head of the declspec list is stored in DECLSPECS.
-   The head of the attribute list is stored in PREFIX_ATTRIBUTES.
-
-   Note that attributes in SPECS_ATTRS are stored in the TREE_PURPOSE of
-   the list elements.  We drop the containing TREE_LIST nodes and link the
-   resulting attributes together the way decl_attributes expects them.  */
-
-void
-split_specs_attrs (specs_attrs, declspecs, prefix_attributes)
-     tree specs_attrs;
-     tree *declspecs, *prefix_attributes;
-{
-  tree t, s, a, next, specs, attrs;
-
-  /* This can happen after an __extension__ in pedantic mode.  */
-  if (specs_attrs != NULL_TREE 
-      && TREE_CODE (specs_attrs) == INTEGER_CST)
-    {
-      *declspecs = NULL_TREE;
-      *prefix_attributes = NULL_TREE;
-      return;
-    }
-
-  /* This can happen in c++ (eg: decl: typespec initdecls ';').  */
-  if (specs_attrs != NULL_TREE
-      && TREE_CODE (specs_attrs) != TREE_LIST)
-    {
-      *declspecs = specs_attrs;
-      *prefix_attributes = NULL_TREE;
-      return;
-    }
-
-  /* Remember to keep the lists in the same order, element-wise.  */
-
-  specs = s = NULL_TREE;
-  attrs = a = NULL_TREE;
-  for (t = specs_attrs; t; t = next)
-    {
-      next = TREE_CHAIN (t);
-      /* Declspecs have a non-NULL TREE_VALUE.  */
-      if (TREE_VALUE (t) != NULL_TREE)
-	{
-	  if (specs == NULL_TREE)
-	    specs = s = t;
-	  else
-	    {
-	      TREE_CHAIN (s) = t;
-	      s = t;
-	    }
-	}
-      /* The TREE_PURPOSE may also be empty in the case of
-	 __attribute__(()).  */
-      else if (TREE_PURPOSE (t) != NULL_TREE)
-	{
-	  if (attrs == NULL_TREE)
-	    attrs = a = TREE_PURPOSE (t);
-	  else
-	    {
-	      TREE_CHAIN (a) = TREE_PURPOSE (t);
-	      a = TREE_PURPOSE (t);
-	    }
-	  /* More attrs can be linked here, move A to the end.  */
-	  while (TREE_CHAIN (a) != NULL_TREE)
-	    a = TREE_CHAIN (a);
-	}
-    }
-
-  /* Terminate the lists.  */
-  if (s != NULL_TREE)
-    TREE_CHAIN (s) = NULL_TREE;
-  if (a != NULL_TREE)
-    TREE_CHAIN (a) = NULL_TREE;
-
-  /* All done.  */
-  *declspecs = specs;
-  *prefix_attributes = attrs;
-}
-
-/* Strip attributes from SPECS_ATTRS, a list of declspecs and attributes.
-   This function is used by the parser when a rule will accept attributes
-   in a particular position, but we don't want to support that just yet.
-
-   A warning is issued for every ignored attribute.  */
-
-tree
-strip_attrs (specs_attrs)
-     tree specs_attrs;
-{
-  tree specs, attrs;
-
-  split_specs_attrs (specs_attrs, &specs, &attrs);
-
-  while (attrs)
-    {
-      warning ("`%s' attribute ignored",
-	       IDENTIFIER_POINTER (TREE_PURPOSE (attrs)));
-      attrs = TREE_CHAIN (attrs);
-    }
-
-  return specs;
-}
-
 static int is_valid_printf_arglist PARAMS ((tree));
 static rtx c_expand_builtin PARAMS ((tree, rtx, enum machine_mode, enum expand_modifier));
 static rtx c_expand_builtin_printf PARAMS ((tree, rtx, enum machine_mode,
@@ -4917,11 +3772,26 @@ boolean_increment (code, arg)
   return val;
 }
 
+/* Give the specifications for the format attributes, used by C and all
+   descendents.  */
+
+static const struct attribute_spec c_format_attribute_table[] =
+{
+  { "format",                 3, 3, true,  false, false,
+			      handle_format_attribute },
+  { "format_arg",             1, 1, true,  false, false,
+			      handle_format_arg_attribute },
+  { NULL,                     0, 0, false, false, false, NULL }
+};
+
+extern const struct attribute_spec *format_attribute_table;
 
 /* Do the parts of lang_init common to C and C++.  */
 void
 c_common_lang_init ()
 {
+  format_attribute_table = c_format_attribute_table;
+
   /* If still "unspecified", make it match -fbounded-pointers.  */
   if (flag_bounds_check < 0)
     flag_bounds_check = flag_bounded_pointers;