gcc/c-lang.c

   1 /* Language-specific hook definitions for C front end.
   2    Copyright (C) 1991, 1995, 1997, 1998,
   3    1999, 2000, 2001, 2003, 2004 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 "coretypes.h"
  26 #include "tm.h"
  27 #include "tree.h"
  28 #include "c-tree.h"
  29 #include "c-common.h"
  30 #include "ggc.h"
  31 #include "langhooks.h"
  32 #include "langhooks-def.h"
  33 #include "tree-inline.h"
  34 #include "diagnostic.h"
  35 #include "c-pretty-print.h"
  36
  37 enum c_language_kind c_language = clk_c;
  38
  39 /* ### When changing hooks, consider if ObjC needs changing too!! ### */
  40
  41 #undef LANG_HOOKS_NAME
  42 #define LANG_HOOKS_NAME "GNU C"
  43 #undef LANG_HOOKS_IDENTIFIER_SIZE
  44 #define LANG_HOOKS_IDENTIFIER_SIZE C_SIZEOF_STRUCT_LANG_IDENTIFIER
  45 #undef LANG_HOOKS_INIT
  46 #define LANG_HOOKS_INIT c_objc_common_init
  47 #undef LANG_HOOKS_FINISH
  48 #define LANG_HOOKS_FINISH c_common_finish
  49 #undef LANG_HOOKS_INIT_OPTIONS
  50 #define LANG_HOOKS_INIT_OPTIONS c_common_init_options
  51 #undef LANG_HOOKS_INITIALIZE_DIAGNOSTICS
  52 #define LANG_HOOKS_INITIALIZE_DIAGNOSTICS c_initialize_diagnostics
  53 #undef LANG_HOOKS_HANDLE_OPTION
  54 #define LANG_HOOKS_HANDLE_OPTION c_common_handle_option
  55 #undef LANG_HOOKS_MISSING_ARGUMENT
  56 #define LANG_HOOKS_MISSING_ARGUMENT c_common_missing_argument
  57 #undef LANG_HOOKS_POST_OPTIONS
  58 #define LANG_HOOKS_POST_OPTIONS c_common_post_options
  59 #undef LANG_HOOKS_GET_ALIAS_SET
  60 #define LANG_HOOKS_GET_ALIAS_SET c_common_get_alias_set
  61 #undef LANG_HOOKS_EXPAND_EXPR
  62 #define LANG_HOOKS_EXPAND_EXPR c_expand_expr
  63 #undef LANG_HOOKS_EXPAND_DECL
  64 #define LANG_HOOKS_EXPAND_DECL c_expand_decl
  65 #undef LANG_HOOKS_MARK_ADDRESSABLE
  66 #define LANG_HOOKS_MARK_ADDRESSABLE c_mark_addressable
  67 #undef LANG_HOOKS_PARSE_FILE
  68 #define LANG_HOOKS_PARSE_FILE c_common_parse_file
  69 #undef LANG_HOOKS_TRUTHVALUE_CONVERSION
  70 #define LANG_HOOKS_TRUTHVALUE_CONVERSION c_objc_common_truthvalue_conversion
  71 #undef LANG_HOOKS_FINISH_INCOMPLETE_DECL
  72 #define LANG_HOOKS_FINISH_INCOMPLETE_DECL c_finish_incomplete_decl
  73 #undef LANG_HOOKS_REDUCE_BIT_FIELD_OPERATIONS
  74 #define LANG_HOOKS_REDUCE_BIT_FIELD_OPERATIONS true
  75 #undef LANG_HOOKS_STATICP
  76 #define LANG_HOOKS_STATICP c_staticp
  77 #undef LANG_HOOKS_NO_BODY_BLOCKS
  78 #define LANG_HOOKS_NO_BODY_BLOCKS true
  79 #undef LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL
  80 #define LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL c_warn_unused_global_decl
  81 #undef LANG_HOOKS_PRINT_IDENTIFIER
  82 #define LANG_HOOKS_PRINT_IDENTIFIER c_print_identifier
  83 #undef LANG_HOOKS_FUNCTION_ENTER_NESTED
  84 #define LANG_HOOKS_FUNCTION_ENTER_NESTED c_push_function_context
  85 #undef LANG_HOOKS_FUNCTION_LEAVE_NESTED
  86 #define LANG_HOOKS_FUNCTION_LEAVE_NESTED c_pop_function_context
  87 #undef LANG_HOOKS_FUNCTION_MISSING_NORETURN_OK_P
  88 #define LANG_HOOKS_FUNCTION_MISSING_NORETURN_OK_P c_missing_noreturn_ok_p
  89 #undef LANG_HOOKS_DUP_LANG_SPECIFIC_DECL
  90 #define LANG_HOOKS_DUP_LANG_SPECIFIC_DECL c_dup_lang_specific_decl
  91
  92 /* Attribute hooks.  */
  93 #undef LANG_HOOKS_COMMON_ATTRIBUTE_TABLE
  94 #define LANG_HOOKS_COMMON_ATTRIBUTE_TABLE c_common_attribute_table
  95 #undef LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE
  96 #define LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE c_common_format_attribute_table
  97
  98 #undef LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN
  99 #define LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN \
 100   c_cannot_inline_tree_fn
 101 #undef LANG_HOOKS_TREE_INLINING_DISREGARD_INLINE_LIMITS
 102 #define LANG_HOOKS_TREE_INLINING_DISREGARD_INLINE_LIMITS \
 103   c_disregard_inline_limits
 104 #undef LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P
 105 #define LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P \
 106   anon_aggr_type_p
 107 #undef LANG_HOOKS_TREE_INLINING_CONVERT_PARM_FOR_INLINING
 108 #define LANG_HOOKS_TREE_INLINING_CONVERT_PARM_FOR_INLINING \
 109   c_convert_parm_for_inlining
 110 #undef LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN
 111 #define LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN c_dump_tree
 112
 113 #undef LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION
 114 #define LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION c_expand_body
 115
 116 #undef LANG_HOOKS_TYPE_FOR_MODE
 117 #define LANG_HOOKS_TYPE_FOR_MODE c_common_type_for_mode
 118 #undef LANG_HOOKS_TYPE_FOR_SIZE
 119 #define LANG_HOOKS_TYPE_FOR_SIZE c_common_type_for_size
 120 #undef LANG_HOOKS_SIGNED_TYPE
 121 #define LANG_HOOKS_SIGNED_TYPE c_common_signed_type
 122 #undef LANG_HOOKS_UNSIGNED_TYPE
 123 #define LANG_HOOKS_UNSIGNED_TYPE c_common_unsigned_type
 124 #undef LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE
 125 #define LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE c_common_signed_or_unsigned_type
 126 #undef LANG_HOOKS_INCOMPLETE_TYPE_ERROR
 127 #define LANG_HOOKS_INCOMPLETE_TYPE_ERROR c_incomplete_type_error
 128 #undef LANG_HOOKS_TYPE_PROMOTES_TO
 129 #define LANG_HOOKS_TYPE_PROMOTES_TO c_type_promotes_to
 130 #undef LANG_HOOKS_REGISTER_BUILTIN_TYPE
 131 #define LANG_HOOKS_REGISTER_BUILTIN_TYPE c_register_builtin_type
 132
 133 /* The C front end's scoping structure is very different from
 134    that expected by the language-independent code; it is best
 135    to disable getdecls.
 136    This means it must also provide its own write_globals.  */
 137
 138 #undef LANG_HOOKS_GETDECLS
 139 #define LANG_HOOKS_GETDECLS lhd_return_null_tree_v
 140 #undef LANG_HOOKS_WRITE_GLOBALS
 141 #define LANG_HOOKS_WRITE_GLOBALS c_write_global_declarations
 142
 143 /* Hooks for tree gimplification.  */
 144 #undef LANG_HOOKS_GIMPLIFY_EXPR
 145 #define LANG_HOOKS_GIMPLIFY_EXPR c_gimplify_expr
 146
 147 #undef LANG_HOOKS_TYPES_COMPATIBLE_P
 148 #define LANG_HOOKS_TYPES_COMPATIBLE_P c_types_compatible_p
 149
 150 /* ### When changing hooks, consider if ObjC needs changing too!! ### */
 151
 152 /* Each front end provides its own.  */
 153 const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
 154
 155 /* Tree code classes.  */
 156
 157 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
 158
 159 const char tree_code_type[] = {
 160 #include "tree.def"
 161   'x',
 162 #include "c-common.def"
 163 };
 164 #undef DEFTREECODE
 165
 166 /* Table indexed by tree code giving number of expression
 167    operands beyond the fixed part of the node structure.
 168    Not used for types or decls.  */
 169
 170 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
 171
 172 const unsigned char tree_code_length[] = {
 173 #include "tree.def"
 174   0,
 175 #include "c-common.def"
 176 };
 177 #undef DEFTREECODE
 178
 179 /* Names of tree components.
 180    Used for printing out the tree and error messages.  */
 181 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
 182
 183 const char *const tree_code_name[] = {
 184 #include "tree.def"
 185   "@@dummy",
 186 #include "c-common.def"
 187 };
 188 #undef DEFTREECODE
 189
 190 /* Final processing of file-scope data.  The Objective-C version of
 191    this function still does something.  */
 192 void
 193 finish_file (void)
 194 {
 195 }
 196
 197 int
 198 c_types_compatible_p (tree x, tree y)
 199 {
 200     return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y));
 201 }
 202
 203 #include "gtype-c.h"