gcc/c-lang.c

   1 /* Language-specific hook definitions for C front end.
   2    Copyright (C) 1991, 1995, 1997, 1998,
   3    1999, 2000 Free Software Foundation, Inc.
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22
  23 #include "config.h"
  24 #include "system.h"
  25 #include "tree.h"
  26 #include "function.h"
  27 #include "input.h"
  28 #include "c-tree.h"
  29 #include "c-lex.h"
  30 #include "toplev.h"
  31 #include "output.h"
  32 #include "flags.h"
  33 #include "ggc.h"
  34
  35 #if USE_CPPLIB
  36 #include "cpplib.h"
  37 extern char *yy_cur;
  38 extern cpp_reader  parse_in;
  39 extern cpp_options parse_options;
  40 #endif
  41
  42 /* Each of the functions defined here
  43    is an alternative to a function in objc-actions.c.  */
  44
  45 int
  46 lang_decode_option (argc, argv)
  47      int argc;
  48      char **argv;
  49 {
  50   return c_decode_option (argc, argv);
  51 }
  52
  53 void
  54 lang_init_options ()
  55 {
  56 #if USE_CPPLIB
  57   cpp_reader_init (&parse_in);
  58   parse_in.opts = &parse_options;
  59   cpp_options_init (&parse_options);
  60 #endif
  61   /* Mark as "unspecified".  */
  62   flag_bounds_check = -1;
  63 }
  64
  65 void
  66 lang_init ()
  67 {
  68   /* If still "unspecified", make it match -fbounded-pointers.  */
  69   if (flag_bounds_check < 0)
  70     flag_bounds_check = flag_bounded_pointers;
  71
  72   /* the beginning of the file is a new line; check for # */
  73   /* With luck, we discover the real source file's name from that
  74      and put it in input_filename.  */
  75 #if !USE_CPPLIB
  76   ungetc (check_newline (), finput);
  77 #else
  78   check_newline ();
  79   yy_cur--;
  80 #endif
  81
  82   save_lang_status = &push_c_function_context;
  83   restore_lang_status = &pop_c_function_context;
  84   mark_lang_status = &mark_c_function_context;
  85
  86   c_parse_init ();
  87 }
  88
  89 void
  90 lang_finish ()
  91 {
  92 }
  93
  94 const char *
  95 lang_identify ()
  96 {
  97   return "c";
  98 }
  99
 100 void
 101 print_lang_statistics ()
 102 {
 103 }
 104
 105 /* used by print-tree.c */
 106
 107 void
 108 lang_print_xnode (file, node, indent)
 109      FILE *file ATTRIBUTE_UNUSED;
 110      tree node ATTRIBUTE_UNUSED;
 111      int indent ATTRIBUTE_UNUSED;
 112 {
 113 }
 114
 115 /* Used by c-lex.c, but only for objc.  */
 116
 117 tree
 118 lookup_interface (arg)
 119      tree arg ATTRIBUTE_UNUSED;
 120 {
 121   return 0;
 122 }
 123
 124 tree
 125 is_class_name (arg)
 126     tree arg ATTRIBUTE_UNUSED;
 127 {
 128   return 0;
 129 }
 130
 131 void
 132 maybe_objc_check_decl (decl)
 133      tree decl ATTRIBUTE_UNUSED;
 134 {
 135 }
 136
 137 int
 138 maybe_objc_comptypes (lhs, rhs, reflexive)
 139      tree lhs ATTRIBUTE_UNUSED;
 140      tree rhs ATTRIBUTE_UNUSED;
 141      int reflexive ATTRIBUTE_UNUSED;
 142 {
 143   return -1;
 144 }
 145
 146 tree
 147 maybe_objc_method_name (decl)
 148     tree decl ATTRIBUTE_UNUSED;
 149 {
 150   return 0;
 151 }
 152
 153 tree
 154 maybe_building_objc_message_expr ()
 155 {
 156   return 0;
 157 }
 158
 159 int
 160 recognize_objc_keyword ()
 161 {
 162   return 0;
 163 }
 164
 165 tree
 166 build_objc_string (len, str)
 167     int len ATTRIBUTE_UNUSED;
 168     const char *str ATTRIBUTE_UNUSED;
 169 {
 170   abort ();
 171   return NULL_TREE;
 172 }
 173
 174 /* Called at end of parsing, but before end-of-file processing.  */
 175
 176 void
 177 finish_file ()
 178 {
 179 #ifndef ASM_OUTPUT_CONSTRUCTOR
 180   extern tree static_ctors;
 181 #endif
 182 #ifndef ASM_OUTPUT_DESTRUCTOR
 183   extern tree static_dtors;
 184 #endif
 185   extern tree build_function_call                 PARAMS ((tree, tree));
 186 #if !defined(ASM_OUTPUT_CONSTRUCTOR) || !defined(ASM_OUTPUT_DESTRUCTOR)
 187   tree void_list_node_1 = build_tree_list (NULL_TREE, void_type_node);
 188 #endif
 189 #ifndef ASM_OUTPUT_CONSTRUCTOR
 190   if (static_ctors)
 191     {
 192       tree fnname = get_file_function_name ('I');
 193       start_function (void_list_node_1,
 194                       build_parse_node (CALL_EXPR, fnname,
 195                                         tree_cons (NULL_TREE, NULL_TREE,
 196                                                    void_list_node_1),
 197                                         NULL_TREE),
 198                       NULL_TREE, NULL_TREE);
 199       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 200       store_parm_decls ();
 201
 202       for (; static_ctors; static_ctors = TREE_CHAIN (static_ctors))
 203         expand_expr_stmt (build_function_call (TREE_VALUE (static_ctors),
 204                                                NULL_TREE));
 205
 206       finish_function (0);
 207
 208       assemble_constructor (IDENTIFIER_POINTER (fnname));
 209     }
 210 #endif
 211 #ifndef ASM_OUTPUT_DESTRUCTOR
 212   if (static_dtors)
 213     {
 214       tree fnname = get_file_function_name ('D');
 215       start_function (void_list_node_1,
 216                       build_parse_node (CALL_EXPR, fnname,
 217                                         tree_cons (NULL_TREE, NULL_TREE,
 218                                                    void_list_node_1),
 219                                         NULL_TREE),
 220                       NULL_TREE, NULL_TREE);
 221       fnname = DECL_ASSEMBLER_NAME (current_function_decl);
 222       store_parm_decls ();
 223
 224       for (; static_dtors; static_dtors = TREE_CHAIN (static_dtors))
 225         expand_expr_stmt (build_function_call (TREE_VALUE (static_dtors),
 226                                                NULL_TREE));
 227
 228       finish_function (0);
 229
 230       assemble_destructor (IDENTIFIER_POINTER (fnname));
 231     }
 232 #endif
 233 }