gcc/c-lang.c

   1 /* Language-specific hook definitions for C front end.
   2    Copyright (C) 1991, 1995, 97-99, 2000 Free Software Foundation, Inc.
   3
   4 This file is part of GNU CC.
   5
   6 GNU CC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU CC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU CC; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21
  22 #include "config.h"
  23 #include "system.h"
  24 #include "tree.h"
  25 #include "function.h"
  26 #include "input.h"
  27 #include "c-tree.h"
  28 #include "c-lex.h"
  29 #include "toplev.h"
  30 #include "output.h"
  31 #include "flags.h"
  32 #include "ggc.h"
  33
  34 #if USE_CPPLIB
  35 #include "cpplib.h"
  36 extern char *yy_cur;
  37 extern cpp_reader  parse_in;
  38 extern cpp_options parse_options;
  39 #endif
  40
  41 /* Each of the functions defined here
  42    is an alternative to a function in objc-actions.c.  */
  43
  44 int
  45 lang_decode_option (argc, argv)
  46      int argc;
  47      char **argv;
  48 {
  49   return c_decode_option (argc, argv);
  50 }
  51
  52 void
  53 lang_init_options ()
  54 {
  55 #if USE_CPPLIB
  56   cpp_reader_init (&parse_in);
  57   parse_in.opts = &parse_options;
  58   cpp_options_init (&parse_options);
  59 #endif
  60   /* Mark as "unspecified".  */
  61   flag_bounds_check = -1;
  62 }
  63
  64 void
  65 lang_init ()
  66 {
  67   /* If still "unspecified", make it match -fbounded-pointers.  */
  68   if (flag_bounds_check < 0)
  69     flag_bounds_check = flag_bounded_pointers;
  70
  71   /* the beginning of the file is a new line; check for # */
  72   /* With luck, we discover the real source file's name from that
  73      and put it in input_filename.  */
  74 #if !USE_CPPLIB
  75   ungetc (check_newline (), finput);
  76 #else
  77   check_newline ();
  78   yy_cur--;
  79 #endif
  80
  81   save_lang_status = &push_c_function_context;
  82   restore_lang_status = &pop_c_function_context;
  83   mark_lang_status = &mark_c_function_context;
  84
  85   c_parse_init ();
  86 }
  87
  88 void
  89 lang_finish ()
  90 {
  91 }
  92
  93 const char *
  94 lang_identify ()
  95 {
  96   return "c";
  97 }
  98
  99 void
 100 print_lang_statistics ()
 101 {
 102 }
 103
 104 /* used by print-tree.c */
 105
 106 void
 107 lang_print_xnode (file, node, indent)
 108      FILE *file ATTRIBUTE_UNUSED;
 109      tree node ATTRIBUTE_UNUSED;
 110      int indent ATTRIBUTE_UNUSED;
 111 {
 112 }
 113
 114 /* Used by c-lex.c, but only for objc.  */
 115
 116 tree
 117 lookup_interface (arg)
 118      tree arg ATTRIBUTE_UNUSED;
 119 {
 120   return 0;
 121 }
 122
 123 tree
 124 is_class_name (arg)
 125     tree arg ATTRIBUTE_UNUSED;
 126 {
 127   return 0;
 128 }
 129
 130 void
 131 maybe_objc_check_decl (decl)
 132      tree decl ATTRIBUTE_UNUSED;
 133 {
 134 }
 135
 136 int
 137 maybe_objc_comptypes (lhs, rhs, reflexive)
 138      tree lhs ATTRIBUTE_UNUSED;
 139      tree rhs ATTRIBUTE_UNUSED;
 140      int reflexive ATTRIBUTE_UNUSED;
 141 {
 142   return -1;
 143 }
 144
 145 tree
 146 maybe_objc_method_name (decl)
 147     tree decl ATTRIBUTE_UNUSED;
 148 {
 149   return 0;
 150 }
 151
 152 tree
 153 maybe_building_objc_message_expr ()
 154 {
 155   return 0;
 156 }
 157
 158 int
 159 recognize_objc_keyword ()
 160 {
 161   return 0;
 162 }
 163
 164 tree
 165 build_objc_string (len, str)
 166     int len ATTRIBUTE_UNUSED;
 167     const char *str ATTRIBUTE_UNUSED;
 168 {
 169   abort ();
 170   return NULL_TREE;
 171 }
 172
 173 /* Called at end of parsing, but before end-of-file processing.  */
 174
 175 void
 176 finish_file ()
 177 {
 178 #ifndef ASM_OUTPUT_CONSTRUCTOR
 179   extern tree static_ctors;
 180 #endif
 181 #ifndef ASM_OUTPUT_DESTRUCTOR
 182   extern tree static_dtors;
 183 #endif
 184   extern tree build_function_call                 PARAMS ((tree, tree));
 185 #if !defined(ASM_OUTPUT_CONSTRUCTOR) || !defined(ASM_OUTPUT_DESTRUCTOR)
 186   tree void_list_node_1 = build_tree_list (NULL_TREE, void_type_node);
 187 #endif
 188 #ifndef ASM_OUTPUT_CONSTRUCTOR
 189   if (static_ctors)
 190     {
 191       tree fnname = get_file_function_name ('I');
 192       start_function (void_list_node_1,
 193                       build_parse_node (CALL_EXPR, fnname,
 194                                         tree_cons (NULL_TREE, NULL_TREE,
 195                                                    void_list_node_1),
 196                                         NULL_TREE),
 197                       NULL_TREE, NULL_TREE);
 198       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 199       store_parm_decls ();
 200
 201       for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
 202         expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
 203                                                NULL_TREE));
 204
 205       finish_function (0);
 206
 207       assemble_constructor (IDENTIFIER_POINTER (fnname));
 208     }
 209 #endif
 210 #ifndef ASM_OUTPUT_DESTRUCTOR
 211   if (static_dtors)
 212     {
 213       tree fnname = get_file_function_name ('D');
 214       start_function (void_list_node_1,
 215                       build_parse_node (CALL_EXPR, fnname,
 216                                         tree_cons (NULL_TREE, NULL_TREE,
 217                                                    void_list_node_1),
 218                                         NULL_TREE),
 219                       NULL_TREE, NULL_TREE);
 220       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 221       store_parm_decls ();
 222
 223       for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
 224         expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
 225                                                NULL_TREE));
 226
 227       finish_function (0);
 228
 229       assemble_destructor (IDENTIFIER_POINTER (fnname));
 230     }
 231 #endif
 232 }