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 static void c_initialize_diagnostics (diagnostic_context *);
  38
  39 enum c_language_kind c_language = clk_c;
  40
  41 /* ### When changing hooks, consider if ObjC needs changing too!! ### */
  42
  43 #undef LANG_HOOKS_NAME
  44 #define LANG_HOOKS_NAME "GNU C"
  45 #undef LANG_HOOKS_IDENTIFIER_SIZE
  46 #define LANG_HOOKS_IDENTIFIER_SIZE C_SIZEOF_STRUCT_LANG_IDENTIFIER
  47 #undef LANG_HOOKS_INIT
  48 #define LANG_HOOKS_INIT c_objc_common_init
  49 #undef LANG_HOOKS_FINISH
  50 #define LANG_HOOKS_FINISH c_common_finish
  51 #undef LANG_HOOKS_INIT_OPTIONS
  52 #define LANG_HOOKS_INIT_OPTIONS c_common_init_options
  53 #undef LANG_HOOKS_INITIALIZE_DIAGNOSTICS
  54 #define LANG_HOOKS_INITIALIZE_DIAGNOSTICS c_initialize_diagnostics
  55 #undef LANG_HOOKS_HANDLE_OPTION
  56 #define LANG_HOOKS_HANDLE_OPTION c_common_handle_option
  57 #undef LANG_HOOKS_MISSING_ARGUMENT
  58 #define LANG_HOOKS_MISSING_ARGUMENT c_common_missing_argument
  59 #undef LANG_HOOKS_POST_OPTIONS
  60 #define LANG_HOOKS_POST_OPTIONS c_common_post_options
  61 #undef LANG_HOOKS_GET_ALIAS_SET
  62 #define LANG_HOOKS_GET_ALIAS_SET c_common_get_alias_set
  63 #undef LANG_HOOKS_EXPAND_EXPR
  64 #define LANG_HOOKS_EXPAND_EXPR c_expand_expr
  65 #undef LANG_HOOKS_EXPAND_DECL
  66 #define LANG_HOOKS_EXPAND_DECL c_expand_decl
  67 #undef LANG_HOOKS_MARK_ADDRESSABLE
  68 #define LANG_HOOKS_MARK_ADDRESSABLE c_mark_addressable
  69 #undef LANG_HOOKS_PARSE_FILE
  70 #define LANG_HOOKS_PARSE_FILE c_common_parse_file
  71 #undef LANG_HOOKS_CLEAR_BINDING_STACK
  72 #define LANG_HOOKS_CLEAR_BINDING_STACK lhd_do_nothing
  73 #undef LANG_HOOKS_TRUTHVALUE_CONVERSION
  74 #define LANG_HOOKS_TRUTHVALUE_CONVERSION c_objc_common_truthvalue_conversion
  75 #undef LANG_HOOKS_FINISH_INCOMPLETE_DECL
  76 #define LANG_HOOKS_FINISH_INCOMPLETE_DECL c_finish_incomplete_decl
  77 #undef LANG_HOOKS_UNSAFE_FOR_REEVAL
  78 #define LANG_HOOKS_UNSAFE_FOR_REEVAL c_common_unsafe_for_reeval
  79 #undef LANG_HOOKS_STATICP
  80 #define LANG_HOOKS_STATICP c_staticp
  81 #undef LANG_HOOKS_SET_DECL_ASSEMBLER_NAME
  82 #define LANG_HOOKS_SET_DECL_ASSEMBLER_NAME c_static_assembler_name
  83 #undef LANG_HOOKS_NO_BODY_BLOCKS
  84 #define LANG_HOOKS_NO_BODY_BLOCKS true
  85 #undef LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL
  86 #define LANG_HOOKS_WARN_UNUSED_GLOBAL_DECL c_warn_unused_global_decl
  87 #undef LANG_HOOKS_PRINT_IDENTIFIER
  88 #define LANG_HOOKS_PRINT_IDENTIFIER c_print_identifier
  89 #undef LANG_HOOKS_FUNCTION_ENTER_NESTED
  90 #define LANG_HOOKS_FUNCTION_ENTER_NESTED c_push_function_context
  91 #undef LANG_HOOKS_FUNCTION_LEAVE_NESTED
  92 #define LANG_HOOKS_FUNCTION_LEAVE_NESTED c_pop_function_context
  93 #undef LANG_HOOKS_FUNCTION_MISSING_NORETURN_OK_P
  94 #define LANG_HOOKS_FUNCTION_MISSING_NORETURN_OK_P c_missing_noreturn_ok_p
  95 #undef LANG_HOOKS_DUP_LANG_SPECIFIC_DECL
  96 #define LANG_HOOKS_DUP_LANG_SPECIFIC_DECL c_dup_lang_specific_decl
  97
  98 /* Attribute hooks.  */
  99 #undef LANG_HOOKS_COMMON_ATTRIBUTE_TABLE
 100 #define LANG_HOOKS_COMMON_ATTRIBUTE_TABLE c_common_attribute_table
 101 #undef LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE
 102 #define LANG_HOOKS_FORMAT_ATTRIBUTE_TABLE c_common_format_attribute_table
 103
 104 #undef LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN
 105 #define LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN \
 106   c_cannot_inline_tree_fn
 107 #undef LANG_HOOKS_TREE_INLINING_DISREGARD_INLINE_LIMITS
 108 #define LANG_HOOKS_TREE_INLINING_DISREGARD_INLINE_LIMITS \
 109   c_disregard_inline_limits
 110 #undef LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P
 111 #define LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P \
 112   anon_aggr_type_p
 113 #undef LANG_HOOKS_TREE_INLINING_CONVERT_PARM_FOR_INLINING
 114 #define LANG_HOOKS_TREE_INLINING_CONVERT_PARM_FOR_INLINING \
 115   c_convert_parm_for_inlining
 116 #undef LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN
 117 #define LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN c_dump_tree
 118
 119 #undef LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION
 120 #define LANG_HOOKS_CALLGRAPH_EXPAND_FUNCTION c_expand_body
 121
 122 #undef LANG_HOOKS_TYPE_FOR_MODE
 123 #define LANG_HOOKS_TYPE_FOR_MODE c_common_type_for_mode
 124 #undef LANG_HOOKS_TYPE_FOR_SIZE
 125 #define LANG_HOOKS_TYPE_FOR_SIZE c_common_type_for_size
 126 #undef LANG_HOOKS_SIGNED_TYPE
 127 #define LANG_HOOKS_SIGNED_TYPE c_common_signed_type
 128 #undef LANG_HOOKS_UNSIGNED_TYPE
 129 #define LANG_HOOKS_UNSIGNED_TYPE c_common_unsigned_type
 130 #undef LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE
 131 #define LANG_HOOKS_SIGNED_OR_UNSIGNED_TYPE c_common_signed_or_unsigned_type
 132 #undef LANG_HOOKS_INCOMPLETE_TYPE_ERROR
 133 #define LANG_HOOKS_INCOMPLETE_TYPE_ERROR c_incomplete_type_error
 134 #undef LANG_HOOKS_TYPE_PROMOTES_TO
 135 #define LANG_HOOKS_TYPE_PROMOTES_TO c_type_promotes_to
 136 #undef LANG_HOOKS_REGISTER_BUILTIN_TYPE
 137 #define LANG_HOOKS_REGISTER_BUILTIN_TYPE c_register_builtin_type
 138
 139 /* The C front end's scoping structure is very different from
 140    that expected by the language-independent code; it is best
 141    to disable all of pushlevel, poplevel, set_block, and getdecls.
 142    This means it must also provide its own write_globals.  */
 143
 144 #undef LANG_HOOKS_PUSHLEVEL
 145 #define LANG_HOOKS_PUSHLEVEL lhd_do_nothing_i
 146 #undef LANG_HOOKS_POPLEVEL
 147 #define LANG_HOOKS_POPLEVEL lhd_do_nothing_iii_return_null_tree
 148 #undef LANG_HOOKS_SET_BLOCK
 149 #define LANG_HOOKS_SET_BLOCK lhd_do_nothing_t
 150 #undef LANG_HOOKS_GETDECLS
 151 #define LANG_HOOKS_GETDECLS lhd_return_null_tree_v
 152 #undef LANG_HOOKS_WRITE_GLOBALS
 153 #define LANG_HOOKS_WRITE_GLOBALS c_write_global_declarations
 154
 155 /* Hooks for tree gimplification.  */
 156 #undef LANG_HOOKS_GIMPLIFY_EXPR
 157 #define LANG_HOOKS_GIMPLIFY_EXPR c_gimplify_expr
 158
 159 #undef LANG_HOOKS_TYPES_COMPATIBLE_P
 160 #define LANG_HOOKS_TYPES_COMPATIBLE_P c_types_compatible_p
 161
 162 /* ### When changing hooks, consider if ObjC needs changing too!! ### */
 163
 164 /* Each front end provides its own.  */
 165 const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
 166
 167 /* Tree code classes.  */
 168
 169 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
 170
 171 const char tree_code_type[] = {
 172 #include "tree.def"
 173   'x',
 174 #include "c-common.def"
 175 };
 176 #undef DEFTREECODE
 177
 178 /* Table indexed by tree code giving number of expression
 179    operands beyond the fixed part of the node structure.
 180    Not used for types or decls.  */
 181
 182 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
 183
 184 const unsigned char tree_code_length[] = {
 185 #include "tree.def"
 186   0,
 187 #include "c-common.def"
 188 };
 189 #undef DEFTREECODE
 190
 191 /* Names of tree components.
 192    Used for printing out the tree and error messages.  */
 193 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
 194
 195 const char *const tree_code_name[] = {
 196 #include "tree.def"
 197   "@@dummy",
 198 #include "c-common.def"
 199 };
 200 #undef DEFTREECODE
 201
 202 void
 203 finish_file (void)
 204 {
 205   c_objc_common_finish_file ();
 206 }
 207
 208 int
 209 c_types_compatible_p (tree x, tree y)
 210 {
 211     return comptypes (TYPE_MAIN_VARIANT (x), TYPE_MAIN_VARIANT (y));
 212 }
 213 static void
 214 c_initialize_diagnostics (diagnostic_context *context)
 215 {
 216   pretty_printer *base = context->printer;
 217   c_pretty_printer *pp = xmalloc (sizeof (c_pretty_printer));
 218   memcpy (pp_base (pp), base, sizeof (pretty_printer));
 219   pp_c_pretty_printer_init (pp);
 220   context->printer = (pretty_printer *) pp;
 221
 222   /* It is safe to free this object because it was previously malloc()'d.  */
 223   free (base);
 224 }
 225
 226 #include "gtype-c.h"