gcc/c-lang.c

   1 /* Language-specific hook definitions for C front end.
   2    Copyright (C) 1991, 1995, 1997, 1998,
   3    1999, 2000, 2001 Free Software Foundation, Inc.
   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
  23 #include "config.h"
  24 #include "system.h"
  25 #include "tree.h"
  26 #include "c-tree.h"
  27 #include "c-common.h"
  28 #include "langhooks.h"
  29 #include "langhooks-def.h"
  30
  31 static const char *c_init PARAMS ((const char *));
  32 static void c_init_options PARAMS ((void));
  33 static void c_post_options PARAMS ((void));
  34
  35 /* ### When changing hooks, consider if ObjC needs changing too!! ### */
  36
  37 #undef LANG_HOOKS_NAME
  38 #define LANG_HOOKS_NAME "GNU C"
  39 #undef LANG_HOOKS_INIT
  40 #define LANG_HOOKS_INIT c_init
  41 #undef LANG_HOOKS_FINISH
  42 #define LANG_HOOKS_FINISH c_common_finish
  43 #undef LANG_HOOKS_INIT_OPTIONS
  44 #define LANG_HOOKS_INIT_OPTIONS c_init_options
  45 #undef LANG_HOOKS_DECODE_OPTION
  46 #define LANG_HOOKS_DECODE_OPTION c_decode_option
  47 #undef LANG_HOOKS_POST_OPTIONS
  48 #define LANG_HOOKS_POST_OPTIONS c_post_options
  49 #undef LANG_HOOKS_GET_ALIAS_SET
  50 #define LANG_HOOKS_GET_ALIAS_SET c_common_get_alias_set
  51 #undef LANG_HOOKS_SAFE_FROM_P
  52 #define LANG_HOOKS_SAFE_FROM_P c_safe_from_p
  53 #undef LANG_HOOKS_MARK_TREE
  54 #define LANG_HOOKS_MARK_TREE c_mark_tree
  55 #undef LANG_HOOKS_EXPAND_EXPR
  56 #define LANG_HOOKS_EXPAND_EXPR c_expand_expr
  57 #undef LANG_HOOKS_MARK_ADDRESSABLE
  58 #define LANG_HOOKS_MARK_ADDRESSABLE c_mark_addressable
  59 #undef LANG_HOOKS_PARSE_FILE
  60 #define LANG_HOOKS_PARSE_FILE c_common_parse_file
  61 #undef LANG_HOOKS_TRUTHVALUE_CONVERSION
  62 #define LANG_HOOKS_TRUTHVALUE_CONVERSION c_common_truthvalue_conversion
  63 #undef LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES
  64 #define LANG_HOOKS_INSERT_DEFAULT_ATTRIBUTES c_insert_default_attributes
  65 #undef LANG_HOOKS_FINISH_INCOMPLETE_DECL
  66 #define LANG_HOOKS_FINISH_INCOMPLETE_DECL c_finish_incomplete_decl
  67 #undef LANG_HOOKS_UNSAFE_FOR_REEVAL
  68 #define LANG_HOOKS_UNSAFE_FOR_REEVAL c_common_unsafe_for_reeval
  69 #undef LANG_HOOKS_STATICP
  70 #define LANG_HOOKS_STATICP c_staticp
  71 #undef LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL
  72 #define LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL c_warn_unused_global_decl
  73 #undef LANG_HOOKS_PRINT_IDENTIFIER
  74 #define LANG_HOOKS_PRINT_IDENTIFIER c_print_identifier
  75 #undef LANG_HOOKS_FUNCTION_ENTER_NESTED
  76 #define LANG_HOOKS_FUNCTION_ENTER_NESTED c_push_function_context
  77 #undef LANG_HOOKS_FUNCTION_LEAVE_NESTED
  78 #define LANG_HOOKS_FUNCTION_LEAVE_NESTED c_pop_function_context
  79 #undef LANG_HOOKS_FUNCTION_MARK
  80 #define LANG_HOOKS_FUNCTION_MARK c_mark_function_context
  81 #undef LANG_HOOKS_DUP_LANG_SPECIFIC_DECL
  82 #define LANG_HOOKS_DUP_LANG_SPECIFIC_DECL c_dup_lang_specific_decl
  83
  84 /* Attribute hooks.  */
  85 #undef LANG_HOOKS_COMMON_ATTRIBUTE_TABLE
  86 #define LANG_HOOKS_COMMON_ATTRIBUTE_TABLE c_common_attribute_table
  87 #undef LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE
  88 #define LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE c_common_format_attribute_table
  89
  90 #undef LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN
  91 #define LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN \
  92   c_cannot_inline_tree_fn
  93 #undef LANG_HOOKS_TREE_INLINING_DISREGARD_INLINE_LIMITS
  94 #define LANG_HOOKS_TREE_INLINING_DISREGARD_INLINE_LIMITS \
  95   c_disregard_inline_limits
  96 #undef LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P
  97 #define LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P \
  98   anon_aggr_type_p
  99 #undef LANG_HOOKS_TREE_INLINING_CONVERT_PARM_FOR_INLINING
 100 #define LANG_HOOKS_TREE_INLINING_CONVERT_PARM_FOR_INLINING \
 101   c_convert_parm_for_inlining
 102
 103 #undef LANG_HOOKS_TYPE_FOR_MODE
 104 #define LANG_HOOKS_TYPE_FOR_MODE c_common_type_for_mode
 105 #undef LANG_HOOKS_TYPE_FOR_SIZE
 106 #define LANG_HOOKS_TYPE_FOR_SIZE c_common_type_for_size
 107 #undef LANG_HOOKS_SIGNED_TYPE
 108 #define LANG_HOOKS_SIGNED_TYPE c_common_signed_type
 109 #undef LANG_HOOKS_UNSIGNED_TYPE
 110 #define LANG_HOOKS_UNSIGNED_TYPE c_common_unsigned_type
 111 #undef LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE
 112 #define LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE c_common_signed_or_unsigned_type
 113 #undef LANG_HOOKS_INCOMPLETE_TYPE_ERROR
 114 #define LANG_HOOKS_INCOMPLETE_TYPE_ERROR c_incomplete_type_error
 115 #undef LANG_HOOKS_TYPE_PROMOTES_TO
 116 #define LANG_HOOKS_TYPE_PROMOTES_TO c_type_promotes_to
 117
 118 /* ### When changing hooks, consider if ObjC needs changing too!! ### */
 119
 120 /* Each front end provides its own.  */
 121 const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
 122
 123 /* Tree code classes.  */
 124
 125 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
 126
 127 const char tree_code_type[] = {
 128 #include "tree.def"
 129   'x',
 130 #include "c-common.def"
 131 };
 132 #undef DEFTREECODE
 133
 134 /* Table indexed by tree code giving number of expression
 135    operands beyond the fixed part of the node structure.
 136    Not used for types or decls.  */
 137
 138 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
 139
 140 const unsigned char tree_code_length[] = {
 141 #include "tree.def"
 142   0,
 143 #include "c-common.def"
 144 };
 145 #undef DEFTREECODE
 146
 147 /* Names of tree components.
 148    Used for printing out the tree and error messages.  */
 149 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
 150
 151 const char *const tree_code_name[] = {
 152 #include "tree.def"
 153   "@@dummy",
 154 #include "c-common.def"
 155 };
 156 #undef DEFTREECODE
 157
 158 /* Post-switch processing.  */
 159 static void
 160 c_post_options ()
 161 {
 162   c_common_post_options ();
 163 }
 164
 165 static void
 166 c_init_options ()
 167 {
 168   c_common_init_options (clk_c);
 169 }
 170
 171 static const char *
 172 c_init (filename)
 173      const char *filename;
 174 {
 175   return c_objc_common_init (filename);
 176 }
 177
 178 /* Used by c-lex.c, but only for objc.  */
 179
 180 tree
 181 lookup_interface (arg)
 182      tree arg ATTRIBUTE_UNUSED;
 183 {
 184   return 0;
 185 }
 186
 187 tree
 188 is_class_name (arg)
 189     tree arg ATTRIBUTE_UNUSED;
 190 {
 191   return 0;
 192 }
 193
 194 void
 195 maybe_objc_check_decl (decl)
 196      tree decl ATTRIBUTE_UNUSED;
 197 {
 198 }
 199
 200 int
 201 maybe_objc_comptypes (lhs, rhs, reflexive)
 202      tree lhs ATTRIBUTE_UNUSED;
 203      tree rhs ATTRIBUTE_UNUSED;
 204      int reflexive ATTRIBUTE_UNUSED;
 205 {
 206   return -1;
 207 }
 208
 209 tree
 210 maybe_building_objc_message_expr ()
 211 {
 212   return 0;
 213 }
 214
 215 int
 216 recognize_objc_keyword ()
 217 {
 218   return 0;
 219 }
 220
 221 /* Used by c-typeck.c (build_external_ref), but only for objc.  */
 222
 223 tree
 224 lookup_objc_ivar (id)
 225      tree id ATTRIBUTE_UNUSED;
 226 {
 227   return 0;
 228 }
 229
 230 void
 231 finish_file ()
 232 {
 233   c_objc_common_finish_file ();
 234 }