rest_of_decl_compilation (decl, 0, 1, 0);  /* Do this here so it gets output later instead of possibly     inside something else we are writing.  */  DECL_INITIAL (decl) = constructor;  /* Add the DECL to the head of this CLASS' list.  */  TREE_PURPOSE (*chain) = tree_cons (NULL_TREE, decl, TREE_PURPOSE (*chain));  pop_obstacks ();  return decl;}/* Build a static constant CONSTRUCTOR   with type TYPE and elements ELTS.  */static treebuild_constructor (type, elts)     tree type, elts;{  tree constructor = build (CONSTRUCTOR, type, NULL_TREE, elts);  TREE_CONSTANT (constructor) = 1;  TREE_STATIC (constructor) = 1;  TREE_READONLY (constructor) = 1;  return constructor;}/* Take care of defining and initializing _OBJC_SYMBOLS.  *//* Predefine the following data type:   struct _objc_symtab   {     long sel_ref_cnt;     SEL *refs;     short cls_def_cnt;     short cat_def_cnt;     void *defs[cls_def_cnt + cat_def_cnt];   }; */static voidbuild_objc_symtab_template (){  tree field_decl, field_decl_chain, index;  objc_symtab_template    = start_struct (RECORD_TYPE, get_identifier (UTAG_SYMTAB));  /* long sel_ref_cnt; */  field_decl = create_builtin_decl (FIELD_DECL,				    long_integer_type_node,				    "sel_ref_cnt");  field_decl_chain = field_decl;  /* SEL *refs; */  field_decl = create_builtin_decl (FIELD_DECL,				    build_pointer_type (selector_type),				    "refs");  chainon (field_decl_chain, field_decl);  /* short cls_def_cnt; */  field_decl = create_builtin_decl (FIELD_DECL,				    short_integer_type_node,				    "cls_def_cnt");  chainon (field_decl_chain, field_decl);  /* short cat_def_cnt; */  field_decl = create_builtin_decl (FIELD_DECL,				    short_integer_type_node,				    "cat_def_cnt");  chainon (field_decl_chain, field_decl);  /* void *defs[cls_def_cnt + cat_def_cnt]; */  if (!flag_next_runtime)    index = build_index_type (build_int_2 (imp_count + cat_count, 0));  else    index = build_index_type (build_int_2 (imp_count + cat_count - 1,					   imp_count == 0 && cat_count == 0					   ? -1 : 0));  field_decl = create_builtin_decl (FIELD_DECL,				    build_array_type (ptr_type_node, index),				    "defs");  chainon (field_decl_chain, field_decl);  finish_struct (objc_symtab_template, field_decl_chain, NULL_TREE);}/* Create the initial value for the `defs' field of _objc_symtab.   This is a CONSTRUCTOR.  */static treeinit_def_list (type)     tree type;{  tree expr, initlist = NULL_TREE;  struct imp_entry *impent;  if (imp_count)    for (impent = imp_list; impent; impent = impent->next)      {	if (TREE_CODE (impent->imp_context) == CLASS_IMPLEMENTATION_TYPE)	  {	    expr = build_unary_op (ADDR_EXPR, impent->class_decl, 0);	    initlist = tree_cons (NULL_TREE, expr, initlist);	  }      }  if (cat_count)    for (impent = imp_list; impent; impent = impent->next)      {	if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE)	  {	    expr = build_unary_op (ADDR_EXPR, impent->class_decl, 0);	    initlist = tree_cons (NULL_TREE, expr, initlist);	  }      }  if (!flag_next_runtime)    {      /* statics = { ..., _OBJC_STATIC_INSTANCES, ... }  */      tree expr;      if (static_instances_decl)	expr = build_unary_op (ADDR_EXPR, static_instances_decl, 0);      else	expr = build_int_2 (0, 0);      initlist = tree_cons (NULL_TREE, expr, initlist);    }  return build_constructor (type, nreverse (initlist));}/* Construct the initial value for all of _objc_symtab.  */static treeinit_objc_symtab (type)     tree type;{  tree initlist;  /* sel_ref_cnt = { ..., 5, ... } */  initlist = build_tree_list (NULL_TREE, build_int_2 (0, 0));  /* refs = { ..., _OBJC_SELECTOR_TABLE, ... } */  if (flag_next_runtime || ! sel_ref_chain)    initlist = tree_cons (NULL_TREE, build_int_2 (0, 0), initlist);  else    initlist = tree_cons (NULL_TREE,			  build_unary_op (ADDR_EXPR,					  UOBJC_SELECTOR_TABLE_decl, 1),			  initlist);  /* cls_def_cnt = { ..., 5, ... } */  initlist = tree_cons (NULL_TREE, build_int_2 (imp_count, 0), initlist);  /* cat_def_cnt = { ..., 5, ... } */  initlist = tree_cons (NULL_TREE, build_int_2 (cat_count, 0), initlist);  /* cls_def = { ..., { &Foo, &Bar, ...}, ... } */  if (imp_count || cat_count || static_instances_decl)    {      tree field = TYPE_FIELDS (type);      field = TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (TREE_CHAIN (field))));      initlist = tree_cons (NULL_TREE, init_def_list (TREE_TYPE (field)),			    initlist);    }  return build_constructor (type, nreverse (initlist));}/* Push forward-declarations of all the categories   so that init_def_list can use them in a CONSTRUCTOR.  */static voidforward_declare_categories (){  struct imp_entry *impent;  tree sav = implementation_context;  for (impent = imp_list; impent; impent = impent->next)    {      if (TREE_CODE (impent->imp_context) == CATEGORY_IMPLEMENTATION_TYPE)	{	  /* Set an invisible arg to synth_id_with_class_suffix.  */	  implementation_context = impent->imp_context;	  impent->class_decl	    = create_builtin_decl (VAR_DECL, objc_category_template,				   IDENTIFIER_POINTER (synth_id_with_class_suffix ("_OBJC_CATEGORY", implementation_context)));	}    }  implementation_context = sav;}/* Create the declaration of _OBJC_SYMBOLS, with type `strict _objc_symtab'   and initialized appropriately.  */static voidgenerate_objc_symtab_decl (){  tree sc_spec;  if (!objc_category_template)    build_category_template ();  /* forward declare categories */  if (cat_count)    forward_declare_categories ();  if (!objc_symtab_template)    build_objc_symtab_template ();  sc_spec = build_tree_list (NULL_TREE, ridpointers[(int) RID_STATIC]);  UOBJC_SYMBOLS_decl = start_decl (get_identifier ("_OBJC_SYMBOLS"),				   tree_cons (NULL_TREE,					      objc_symtab_template, sc_spec),				   1,				   NULL_TREE, NULL_TREE);  TREE_USED (UOBJC_SYMBOLS_decl) = 1;  DECL_IGNORED_P (UOBJC_SYMBOLS_decl) = 1;  DECL_ARTIFICIAL (UOBJC_SYMBOLS_decl) = 1;  finish_decl (UOBJC_SYMBOLS_decl,	       init_objc_symtab (TREE_TYPE (UOBJC_SYMBOLS_decl)),	       NULL_TREE);}static treeinit_module_descriptor (type)     tree type;{  tree initlist, expr;  /* version = { 1, ... } */  expr = build_int_2 (OBJC_VERSION, 0);  initlist = build_tree_list (NULL_TREE, expr);  /* size = { ..., sizeof (struct objc_module), ... } */  expr = size_in_bytes (objc_module_template);  initlist = tree_cons (NULL_TREE, expr, initlist);  /* name = { ..., "foo.m", ... } */  expr = add_objc_string (get_identifier (input_filename), class_names);  initlist = tree_cons (NULL_TREE, expr, initlist);  /* symtab = { ..., _OBJC_SYMBOLS, ... } */  if (UOBJC_SYMBOLS_decl)    expr = build_unary_op (ADDR_EXPR, UOBJC_SYMBOLS_decl, 0);  else    expr = build_int_2 (0, 0);  initlist = tree_cons (NULL_TREE, expr, initlist);  return build_constructor (type, nreverse (initlist));}/* Write out the data structures to describe Objective C classes defined.   If appropriate, compile and output a setup function to initialize them.   Return a string which is the name of a function to call to initialize   the Objective C data structures for this file (and perhaps for other files   also).   struct objc_module { ... } _OBJC_MODULE = { ... };   */static char *build_module_descriptor (){  tree decl_specs, field_decl, field_decl_chain;  objc_module_template    = start_struct (RECORD_TYPE, get_identifier (UTAG_MODULE));  /* Long version; */  decl_specs = build_tree_list (NULL_TREE, ridpointers[(int) RID_LONG]);  field_decl = get_identifier ("version");  field_decl    = grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);  field_decl_chain = field_decl;  /* long  size; */  decl_specs = build_tree_list (NULL_TREE, ridpointers[(int) RID_LONG]);  field_decl = get_identifier ("size");  field_decl    = grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);  chainon (field_decl_chain, field_decl);  /* char  *name; */  decl_specs = build_tree_list (NULL_TREE, ridpointers[(int) RID_CHAR]);  field_decl = build1 (INDIRECT_REF, NULL_TREE, get_identifier ("name"));  field_decl    = grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);  chainon (field_decl_chain, field_decl);  /* struct objc_symtab *symtab; */  decl_specs = get_identifier (UTAG_SYMTAB);  decl_specs = build_tree_list (NULL_TREE, xref_tag (RECORD_TYPE, decl_specs));  field_decl = build1 (INDIRECT_REF, NULL_TREE, get_identifier ("symtab"));  field_decl    = grokfield (input_filename, lineno, field_decl, decl_specs, NULL_TREE);  chainon (field_decl_chain, field_decl);  finish_struct (objc_module_template, field_decl_chain, NULL_TREE);  /* Create an instance of "objc_module".  */  decl_specs = tree_cons (NULL_TREE, objc_module_template,			  build_tree_list (NULL_TREE,					   ridpointers[(int) RID_STATIC]));  UOBJC_MODULES_decl = start_decl (get_identifier ("_OBJC_MODULES"),				   decl_specs, 1, NULL_TREE, NULL_TREE);  DECL_ARTIFICIAL (UOBJC_MODULES_decl) = 1;  DECL_IGNORED_P (UOBJC_MODULES_decl) = 1;  finish_decl (UOBJC_MODULES_decl,	       init_module_descriptor (TREE_TYPE (UOBJC_MODULES_decl)),	       NULL_TREE);  /* Mark the decl to avoid "defined but not used" warning.  */  DECL_IN_SYSTEM_HEADER (UOBJC_MODULES_decl) = 1;  /* Generate a constructor call for the module descriptor.     This code was generated by reading the grammar rules     of c-parse.in;  Therefore, it may not be the most efficient     way of generating the requisite code.  */  if (flag_next_runtime)    return 0;  {    tree parms, function_decl, decelerator, void_list_node;    tree function_type;    extern tree get_file_function_name ();    tree init_function_name = get_file_function_name ('I');    /* Declare void __objc_execClass (void *); */    void_list_node = build_tree_list (NULL_TREE, void_type_node);    function_type      = build_function_type (void_type_node,			     tree_cons (NULL_TREE, ptr_type_node,					void_list_node));    function_decl = build_decl (FUNCTION_DECL,				get_identifier (TAG_EXECCLASS),				function_type);    DECL_EXTERNAL (function_decl) = 1;    DECL_ARTIFICIAL (function_decl) = 1;    TREE_PUBLIC (function_decl) = 1;    pushdecl (function_decl);    rest_of_decl_compilation (function_decl, 0, 0, 0);    parms      = build_tree_list (NULL_TREE,			 build_unary_op (ADDR_EXPR, UOBJC_MODULES_decl, 0));    decelerator = build_function_call (function_decl, parms);    /* void _GLOBAL_$I$<gnyf> () {objc_execClass (&L_OBJC_MODULES);}  */    start_function (void_list_node,		    build_parse_node (CALL_EXPR, init_function_name,				      /* This has the format of the output					 of get_parm_info.  */				      tree_cons (NULL_TREE, NULL_TREE,						 void_list_node),				      NULL_TREE),		    NULL_TREE, NULL_TREE, 0);#if 0 /* This should be turned back on later	 for the systems where collect is not needed.  */    /* Make these functions nonglobal       so each file can use the same name.  */    TREE_PUBLIC (current_function_decl) = 0;#endif    TREE_USED (current_function_decl) = 1;    store_parm_decls ();    assemble_external (function_decl);    c_expand_expr_stmt (decelerator);    TREE_PUBLIC (current_function_decl) = 1;    function_decl = current_function_decl;    finish_function (0);    /* Return the name of the constructor function.  */    return XSTR (XEXP (DECL_RTL (function_decl), 0), 0);  }}/* extern const char _OBJC_STRINGS[]; */static voidgenerate_forward_declaration_to_string_table (){  tree sc_spec, decl_specs, expr_decl;  sc_spec = tree_cons (NULL_TREE, ridpointers[(int) RID_EXTERN], NULL_TREE);  decl_specs = tree_cons (NULL_TREE, ridpointers[(int) RID_CHAR], sc_spec);  expr_decl    = build_nt (ARRAY_REF, get_identifier ("_OBJC_STRINGS"), NULL_TREE);  UOBJC_STRINGS_decl = define_decl (expr_decl, decl_specs);}/* Return the DECL of the string IDENT in the SECTION.  */static treeget_objc_string_decl (ident, section)     tree ident;     enum string_section section;{  tree chain, decl;  if (section == class_names)    chain = class_names_chain;  else if (section == meth_var_names)    chain = meth_var_names_chain;  else if (section == meth_var_types)    chain = meth_var_types_chain;  for (; chain != 0; chain = TREE_VALUE (chain))    if (TREE_VALUE (chain) == ident)      return (TREE_PURPOSE (chain));  abort ();  return NULL_TREE;}/* Output references to all statically allocated objects.  Return the DECL   for the array built.  */static voidgenerate_static_references (){  tree decls = NULL_TREE, ident, decl_spec, expr_decl, expr = NULL_TREE;  tree class_name, class, decl, instance, idecl, initlist;