gcc/java/lang.c

   1 /* Java(TM) language-specific utility routines.
   2    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001
   3    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 Java and all Java-based marks are trademarks or registered trademarks
  23 of Sun Microsystems, Inc. in the United States and other countries.
  24 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  25
  26 /* Hacked by Per Bothner <bothner@cygnus.com> February 1996. */
  27
  28 #include "config.h"
  29 #include "system.h"
  30 #include "tree.h"
  31 #include "input.h"
  32 #include "rtl.h"
  33 #include "expr.h"
  34 #include "java-tree.h"
  35 #include "jcf.h"
  36 #include "toplev.h"
  37 #include "flags.h"
  38 #include "xref.h"
  39 #include "ggc.h"
  40 #include "diagnostic.h"
  41
  42 struct string_option
  43 {
  44   const char *string;
  45   int *variable;
  46   int on_value;
  47 };
  48
  49 static void java_init PARAMS ((void));
  50 static void java_init_options PARAMS ((void));
  51 static int java_decode_option PARAMS ((int, char **));
  52 static void put_decl_string PARAMS ((const char *, int));
  53 static void put_decl_node PARAMS ((tree));
  54 static void java_dummy_print PARAMS ((diagnostic_context *, const char *));
  55 static void lang_print_error PARAMS ((diagnostic_context *, const char *));
  56 static int process_option_with_no PARAMS ((char *,
  57                                            struct string_option *,
  58                                            int));
  59
  60 #ifndef TARGET_OBJECT_SUFFIX
  61 # define TARGET_OBJECT_SUFFIX ".o"
  62 #endif
  63
  64 /* Table indexed by tree code giving a string containing a character
  65    classifying the tree code.  Possibilities are
  66    t, d, s, c, r, <, 1 and 2.  See java/java-tree.def for details.  */
  67
  68 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
  69
  70 char java_tree_code_type[] = {
  71   'x',
  72 #include "java-tree.def"
  73 };
  74 #undef DEFTREECODE
  75
  76 /* Table indexed by tree code giving number of expression
  77    operands beyond the fixed part of the node structure.
  78    Not used for types or decls.  */
  79
  80 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
  81
  82 int java_tree_code_length[] = {
  83   0,
  84 #include "java-tree.def"
  85 };
  86 #undef DEFTREECODE
  87
  88 /* Names of tree components.
  89    Used for printing out the tree and error messages.  */
  90 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
  91
  92 const char *java_tree_code_name[] = {
  93   "@@dummy",
  94 #include "java-tree.def"
  95 };
  96 #undef DEFTREECODE
  97
  98 int compiling_from_source;
  99
 100 const char * const language_string = "GNU Java";
 101
 102 int flag_emit_class_files = 0;
 103
 104 /* Nonzero if input file is a file with a list of filenames to compile. */
 105
 106 int flag_filelist_file = 0;
 107
 108 /* When non zero, we emit xref strings. Values of the flag for xref
 109    backends are defined in xref_flag_table, xref.c.  */
 110
 111 int flag_emit_xref = 0;
 112
 113 /* When non zero, -Wall was turned on.  */
 114 int flag_wall = 0;
 115
 116 /* When non zero, check for redundant modifier uses.  */
 117 int flag_redundant = 0;
 118
 119 /* When non zero, call a library routine to do integer divisions. */
 120 int flag_use_divide_subroutine = 1;
 121
 122 /* When non zero, generate code for the Boehm GC.  */
 123 int flag_use_boehm_gc = 0;
 124
 125 /* When non zero, assume the runtime uses a hash table to map an
 126    object to its synchronization structure.  */
 127 int flag_hash_synchronization;
 128
 129 /* When non zero, assume all native functions are implemented with
 130    JNI, not CNI.  */
 131 int flag_jni = 0;
 132
 133 /* When non zero, warn when source file is newer than matching class
 134    file.  */
 135 int flag_newer = 1;
 136
 137 /* When non zero, generate checks for references to NULL.  */
 138 int flag_check_references = 0;
 139
 140 /* The encoding of the source file.  */
 141 const char *current_encoding = NULL;
 142
 143 /* When non zero, report the now deprecated empty statements.  */
 144 int flag_extraneous_semicolon;
 145
 146 /* When non zero, always check for a non gcj generated classes archive.  */
 147 int flag_force_classes_archive_check;
 148
 149 /* Table of language-dependent -f options.
 150    STRING is the option name.  VARIABLE is the address of the variable.
 151    ON_VALUE is the value to store in VARIABLE
 152     if `-fSTRING' is seen as an option.
 153    (If `-fno-STRING' is seen as an option, the opposite value is stored.)  */
 154
 155 static struct string_option
 156 lang_f_options[] =
 157 {
 158   {"emit-class-file", &flag_emit_class_files, 1},
 159   {"emit-class-files", &flag_emit_class_files, 1},
 160   {"filelist-file", &flag_filelist_file, 1},
 161   {"use-divide-subroutine", &flag_use_divide_subroutine, 1},
 162   {"use-boehm-gc", &flag_use_boehm_gc, 1},
 163   {"hash-synchronization", &flag_hash_synchronization, 1},
 164   {"jni", &flag_jni, 1},
 165   {"check-references", &flag_check_references, 1},
 166   {"force-classes-archive-check", &flag_force_classes_archive_check, 1}
 167 };
 168
 169 static struct string_option
 170 lang_W_options[] =
 171 {
 172   { "redundant-modifiers", &flag_redundant, 1 },
 173   { "extraneous-semicolon", &flag_extraneous_semicolon, 1 },
 174   { "out-of-date", &flag_newer, 1 }
 175 };
 176
 177 JCF *current_jcf;
 178
 179 /* Variable controlling how dependency tracking is enabled in
 180    init_parse.  */
 181 static int dependency_tracking = 0;
 182
 183 /* Flag values for DEPENDENCY_TRACKING.  */
 184 #define DEPEND_SET_FILE 1
 185 #define DEPEND_ENABLE   2
 186 #define DEPEND_TARGET_SET 4
 187 #define DEPEND_FILE_ALREADY_SET 8
 188
 189 /* Each front end provides its own.  */
 190 struct lang_hooks lang_hooks = {java_init,
 191                                 NULL, /* java_finish */
 192                                 java_init_options,
 193                                 java_decode_option,
 194                                 NULL /* post_options */};
 195
 196 /* Process an option that can accept a `no-' form.
 197    Return 1 if option found, 0 otherwise.  */
 198 static int
 199 process_option_with_no (p, table, table_size)
 200      char *p;
 201      struct string_option *table;
 202      int table_size;
 203 {
 204   int j;
 205
 206   for (j = 0; j < table_size; j++)
 207     {
 208       if (!strcmp (p, table[j].string))
 209         {
 210           *table[j].variable = table[j].on_value;
 211           return 1;
 212         }
 213       if (p[0] == 'n' && p[1] == 'o' && p[2] == '-'
 214           && ! strcmp (p+3, table[j].string))
 215         {
 216           *table[j].variable = ! table[j].on_value;
 217           return 1;
 218         }
 219     }
 220
 221   return 0;
 222 }
 223
 224 /*
 225  * process java-specific compiler command-line options
 226  * return 0, but do not complain if the option is not recognised.
 227  */
 228 static int
 229 java_decode_option (argc, argv)
 230      int argc __attribute__ ((__unused__));
 231      char **argv;
 232 {
 233   char *p = argv[0];
 234
 235 #define CLARG "-fassume-compiled="
 236   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 237     {
 238       add_assume_compiled (p + sizeof (CLARG) - 1, 0);
 239       return 1;
 240     }
 241 #undef CLARG
 242 #define CLARG "-fno-assume-compiled="
 243   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 244     {
 245       add_assume_compiled (p + sizeof (CLARG) - 1, 1);
 246       return 1;
 247     }
 248 #undef CLARG
 249 #define CLARG "-fassume-compiled"
 250   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 251     {
 252       add_assume_compiled ("", 0);
 253       return 1;
 254     }
 255 #undef CLARG
 256 #define CLARG "-fno-assume-compiled"
 257   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 258     {
 259       add_assume_compiled ("", 1);
 260       return 1;
 261     }
 262 #undef CLARG
 263 #define CLARG "-fclasspath="
 264   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 265     {
 266       jcf_path_classpath_arg (p + sizeof (CLARG) - 1);
 267       return 1;
 268     }
 269 #undef CLARG
 270 #define CLARG "-fCLASSPATH="
 271   if (strncmp (p, CLARG, sizeof (CLARG) - 1) == 0)
 272     {
 273       jcf_path_CLASSPATH_arg (p + sizeof (CLARG) - 1);
 274       return 1;
 275     }
 276 #undef CLARG
 277   else if (strncmp (p, "-I", 2) == 0)
 278     {
 279       jcf_path_include_arg (p + 2);
 280       return 1;
 281     }
 282
 283 #define ARG "-foutput-class-dir="
 284   if (strncmp (p, ARG, sizeof (ARG) - 1) == 0)
 285     {
 286       jcf_write_base_directory = p + sizeof (ARG) - 1;
 287       return 1;
 288     }
 289 #undef ARG
 290 #define ARG "-fencoding="
 291   if (strncmp (p, ARG, sizeof (ARG) - 1) == 0)
 292     {
 293       current_encoding = p + sizeof (ARG) - 1;
 294       return 1;
 295     }
 296 #undef ARG
 297
 298   if (p[0] == '-' && p[1] == 'f')
 299     {
 300       /* Some kind of -f option.
 301          P's value is the option sans `-f'.
 302          Search for it in the table of options.  */
 303       p += 2;
 304       return process_option_with_no (p, lang_f_options,
 305                                      ARRAY_SIZE (lang_f_options));
 306     }
 307
 308   if (strcmp (p, "-Wall") == 0)
 309     {
 310       flag_wall = 1;
 311       flag_redundant = 1;
 312       flag_extraneous_semicolon = 1;
 313       /* When -Wall given, enable -Wunused.  We do this because the C
 314          compiler does it, and people expect it.  */
 315       set_Wunused (1);
 316       return 1;
 317     }
 318
 319   if (p[0] == '-' && p[1] == 'W')
 320     {
 321       /* Skip `-W' and see if we accept the option or its `no-' form.  */
 322       p += 2;
 323       return process_option_with_no (p, lang_W_options,
 324                                      ARRAY_SIZE (lang_W_options));
 325     }
 326
 327   if (strcmp (p, "-MD") == 0)
 328     {
 329       jcf_dependency_init (1);
 330       dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
 331       return 1;
 332     }
 333   else if (strcmp (p, "-MMD") == 0)
 334     {
 335       jcf_dependency_init (0);
 336       dependency_tracking |= DEPEND_SET_FILE | DEPEND_ENABLE;
 337       return 1;
 338     }
 339   else if (strcmp (p, "-M") == 0)
 340     {
 341       jcf_dependency_init (1);
 342       dependency_tracking |= DEPEND_ENABLE;
 343       return 1;
 344     }
 345   else if (strcmp (p, "-MM") == 0)
 346     {
 347       jcf_dependency_init (0);
 348       dependency_tracking |= DEPEND_ENABLE;
 349       return 1;
 350     }
 351   else if (strcmp (p, "-MP") == 0)
 352     {
 353       jcf_dependency_print_dummies ();
 354       return 1;
 355     }
 356   else if (strcmp (p, "-MT") == 0)
 357     {
 358       jcf_dependency_set_target (argv[1]);
 359       dependency_tracking |= DEPEND_TARGET_SET;
 360       return 2;
 361     }
 362   else if (strcmp (p, "-MF") == 0)
 363     {
 364       jcf_dependency_set_dep_file (argv[1]);
 365       dependency_tracking |= DEPEND_FILE_ALREADY_SET;
 366       return 2;
 367     }
 368
 369   return 0;
 370 }
 371
 372 /* Global open file.  */
 373 FILE *finput;
 374
 375 const char *
 376 init_parse (filename)
 377      const char *filename;
 378 {
 379   /* Open input file.  */
 380
 381   if (filename == 0 || !strcmp (filename, "-"))
 382     {
 383       finput = stdin;
 384       filename = "stdin";
 385
 386       if (dependency_tracking)
 387         error ("can't do dependency tracking with input from stdin");
 388     }
 389   else
 390     {
 391       if (dependency_tracking)
 392         {
 393           char *dot;
 394
 395           /* If the target is set and the output filename is set, then
 396              there's no processing to do here.  Otherwise we must
 397              compute one or the other.  */
 398           if (! ((dependency_tracking & DEPEND_TARGET_SET)
 399                  && (dependency_tracking & DEPEND_FILE_ALREADY_SET)))
 400             {
 401               dot = strrchr (filename, '.');
 402               if (dot == NULL)
 403                 error ("couldn't determine target name for dependency tracking");
 404               else
 405                 {
 406                   char *buf = (char *) xmalloc (dot - filename +
 407                                                 3 + sizeof (TARGET_OBJECT_SUFFIX));
 408                   strncpy (buf, filename, dot - filename);
 409
 410                   /* If emitting class files, we might have multiple
 411                      targets.  The class generation code takes care of
 412                      registering them.  Otherwise we compute the
 413                      target name here.  */
 414                   if ((dependency_tracking & DEPEND_TARGET_SET))
 415                     ; /* Nothing.  */
 416                   else if (flag_emit_class_files)
 417                     jcf_dependency_set_target (NULL);
 418                   else
 419                     {
 420                       strcpy (buf + (dot - filename), TARGET_OBJECT_SUFFIX);
 421                       jcf_dependency_set_target (buf);
 422                     }
 423
 424                   if ((dependency_tracking & DEPEND_FILE_ALREADY_SET))
 425                     ; /* Nothing.  */
 426                   else if ((dependency_tracking & DEPEND_SET_FILE))
 427                     {
 428                       strcpy (buf + (dot - filename), ".d");
 429                       jcf_dependency_set_dep_file (buf);
 430                     }
 431                   else
 432                     jcf_dependency_set_dep_file ("-");
 433
 434                   free (buf);
 435                 }
 436             }
 437         }
 438     }
 439
 440   init_lex ();
 441
 442   return filename;
 443 }
 444
 445 void
 446 finish_parse ()
 447 {
 448   jcf_dependency_write ();
 449 }
 450
 451 /* Buffer used by lang_printable_name. */
 452 static char *decl_buf = NULL;
 453
 454 /* Allocated size of decl_buf. */
 455 static int decl_buflen = 0;
 456
 457 /* Length of used part of decl_buf;  position for next character. */
 458 static int decl_bufpos = 0;
 459
 460 /* Append the string STR to decl_buf.
 461    It length is given by LEN;  -1 means the string is nul-terminated. */
 462
 463 static void
 464 put_decl_string (str, len)
 465      const char *str;
 466      int len;
 467 {
 468   if (len < 0)
 469     len = strlen (str);
 470   if (decl_bufpos + len >= decl_buflen)
 471     {
 472       if (decl_buf == NULL)
 473         {
 474           decl_buflen = len + 100;
 475           decl_buf = (char *) xmalloc (decl_buflen);
 476         }
 477       else
 478         {
 479           decl_buflen *= 2;
 480           decl_buf = (char *) xrealloc (decl_buf, decl_buflen);
 481         }
 482     }
 483   strcpy (decl_buf + decl_bufpos, str);
 484   decl_bufpos += len;
 485 }
 486
 487 /* Append to decl_buf a printable name for NODE. */
 488
 489 static void
 490 put_decl_node (node)
 491      tree node;
 492 {
 493   int was_pointer = 0;
 494   if (TREE_CODE (node) == POINTER_TYPE)
 495     {
 496       node = TREE_TYPE (node);
 497       was_pointer = 1;
 498     }
 499   if (TREE_CODE_CLASS (TREE_CODE (node)) == 'd'
 500       && DECL_NAME (node) != NULL_TREE)
 501     {
 502       /* We want to print the type the DECL belongs to. We don't do
 503          that when we handle constructors. */
 504       if (TREE_CODE (node) == FUNCTION_DECL
 505           && ! DECL_CONSTRUCTOR_P (node)
 506           && ! DECL_ARTIFICIAL (node) && DECL_CONTEXT (node))
 507         {
 508           put_decl_node (TYPE_NAME (DECL_CONTEXT (node)));
 509           put_decl_string (".", 1);
 510         }
 511       if (! DECL_CONSTRUCTOR_P (node))
 512         put_decl_node (DECL_NAME (node));
 513       if (TREE_CODE (node) == FUNCTION_DECL && TREE_TYPE (node) != NULL_TREE)
 514         {
 515           int i = 0;
 516           tree args = TYPE_ARG_TYPES (TREE_TYPE (node));
 517           if (TREE_CODE (TREE_TYPE (node)) == METHOD_TYPE)
 518             args = TREE_CHAIN (args);
 519           put_decl_string ("(", 1);
 520           for ( ; args != end_params_node;  args = TREE_CHAIN (args), i++)
 521             {
 522               if (i > 0)
 523                 put_decl_string (",", 1);
 524               put_decl_node (TREE_VALUE (args));
 525             }
 526           put_decl_string (")", 1);
 527         }
 528     }
 529   else if (TREE_CODE_CLASS (TREE_CODE (node)) == 't'
 530       && TYPE_NAME (node) != NULL_TREE)
 531     {
 532       if (TREE_CODE (node) == RECORD_TYPE && TYPE_ARRAY_P (node))
 533         {
 534           put_decl_node (TYPE_ARRAY_ELEMENT (node));
 535           put_decl_string("[]", 2);
 536         }
 537       else if (node == promoted_byte_type_node)
 538         put_decl_string ("byte", 4);
 539       else if (node == promoted_short_type_node)
 540         put_decl_string ("short", 5);
 541       else if (node == promoted_char_type_node)
 542         put_decl_string ("char", 4);
 543       else if (node == promoted_boolean_type_node)
 544         put_decl_string ("boolean", 7);
 545       else if (node == void_type_node && was_pointer)
 546         put_decl_string ("null", 4);
 547       else
 548         put_decl_node (TYPE_NAME (node));
 549     }
 550   else if (TREE_CODE (node) == IDENTIFIER_NODE)
 551     put_decl_string (IDENTIFIER_POINTER (node), IDENTIFIER_LENGTH (node));
 552   else
 553     put_decl_string ("<unknown>", -1);
 554 }
 555
 556 /* Return a user-friendly name for DECL.
 557    The resulting string is only valid until the next call.
 558    The value of the hook decl_printable_name is this function,
 559    which is also called directly by lang_print_error. */
 560
 561 const char *
 562 lang_printable_name (decl, v)
 563      tree decl;
 564      int v  __attribute__ ((__unused__));
 565 {
 566   decl_bufpos = 0;
 567   put_decl_node (decl);
 568   put_decl_string ("", 1);
 569   return decl_buf;
 570 }
 571
 572 /* Does the same thing that lang_printable_name, but add a leading
 573    space to the DECL name string -- With Leading Space.  */
 574
 575 const char *
 576 lang_printable_name_wls (decl, v)
 577      tree decl;
 578      int v  __attribute__ ((__unused__));
 579 {
 580   decl_bufpos = 1;
 581   put_decl_node (decl);
 582   put_decl_string ("", 1);
 583   decl_buf [0] = ' ';
 584   return decl_buf;
 585 }
 586
 587 /* Print on stderr the current class and method context.  This function
 588    is the value of the hook print_error_function, called from toplev.c. */
 589
 590 static void
 591 lang_print_error (context, file)
 592      diagnostic_context *context __attribute__((__unused__));
 593      const char *file;
 594 {
 595   static tree last_error_function_context = NULL_TREE;
 596   static tree last_error_function = NULL;
 597   static int initialized_p;
 598
 599   /* Register LAST_ERROR_FUNCTION_CONTEXT and LAST_ERROR_FUNCTION with
 600      the garbage collector.  */
 601   if (!initialized_p)
 602     {
 603       ggc_add_tree_root (&last_error_function_context, 1);
 604       ggc_add_tree_root (&last_error_function, 1);
 605       initialized_p = 1;
 606     }
 607
 608   if (current_function_decl != NULL
 609       && DECL_CONTEXT (current_function_decl) != last_error_function_context)
 610     {
 611       if (file)
 612         fprintf (stderr, "%s: ", file);
 613
 614       last_error_function_context = DECL_CONTEXT (current_function_decl);
 615       fprintf (stderr, "In class `%s':\n",
 616                lang_printable_name (last_error_function_context, 0));
 617     }
 618   if (last_error_function != current_function_decl)
 619     {
 620       if (file)
 621         fprintf (stderr, "%s: ", file);
 622
 623       if (current_function_decl == NULL)
 624         fprintf (stderr, "At top level:\n");
 625       else
 626         {
 627           const char *name = lang_printable_name (current_function_decl, 2);
 628           fprintf (stderr, "In method `%s':\n", name);
 629         }
 630
 631       last_error_function = current_function_decl;
 632     }
 633
 634 }
 635
 636 static void
 637 java_init ()
 638 {
 639 #if 0
 640   extern int flag_minimal_debug;
 641   flag_minimal_debug = 0;
 642 #endif
 643
 644   jcf_path_init ();
 645   jcf_path_seal ();
 646
 647   decl_printable_name = lang_printable_name;
 648   print_error_function = lang_print_error;
 649   lang_expand_expr = java_lang_expand_expr;
 650
 651   /* Append to Gcc tree node definition arrays */
 652
 653   memcpy (tree_code_type + (int) LAST_AND_UNUSED_TREE_CODE,
 654           java_tree_code_type,
 655           (int)LAST_JAVA_TREE_CODE - (int)LAST_AND_UNUSED_TREE_CODE);
 656   memcpy (tree_code_length + (int) LAST_AND_UNUSED_TREE_CODE,
 657           java_tree_code_length,
 658           (LAST_JAVA_TREE_CODE -
 659            (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (int));
 660   memcpy (tree_code_name + (int) LAST_AND_UNUSED_TREE_CODE,
 661           java_tree_code_name,
 662           (LAST_JAVA_TREE_CODE -
 663            (int)LAST_AND_UNUSED_TREE_CODE) * sizeof (char *));
 664
 665   using_eh_for_cleanups ();
 666 }
 667
 668 /* This doesn't do anything on purpose. It's used to satisfy the
 669    print_error_function hook we don't print error messages with bogus
 670    function prototypes.  */
 671
 672 static void
 673 java_dummy_print (c, s)
 674      diagnostic_context *c __attribute__ ((__unused__));
 675      const char *s __attribute__ ((__unused__));
 676 {
 677 }
 678
 679 /* Called to install the PRINT_ERROR_FUNCTION hook differently
 680    according to LEVEL. LEVEL is 1 during early parsing, when function
 681    prototypes aren't fully resolved. print_error_function is set so it
 682    doesn't print incomplete function prototypes. When LEVEL is 2,
 683    function prototypes are fully resolved and can be printed when
 684    reporting errors.  */
 685
 686 void lang_init_source (level)
 687      int level;
 688 {
 689   if (level == 1)
 690     print_error_function = java_dummy_print;
 691   else
 692     print_error_function = lang_print_error;
 693 }
 694
 695 static void
 696 java_init_options ()
 697 {
 698   flag_bounds_check = 1;
 699   flag_exceptions = 1;
 700   flag_non_call_exceptions = 1;
 701 }
 702
 703 const char *
 704 lang_identify ()
 705 {
 706   return "Java";
 707 }
 708
 709 /* Hooks for print_node.  */
 710
 711 void
 712 print_lang_decl (file, node, indent)
 713      FILE *file __attribute ((__unused__));
 714      tree node __attribute ((__unused__));
 715      int indent __attribute ((__unused__));
 716 {
 717 }
 718
 719 void
 720 print_lang_type (file, node, indent)
 721      FILE *file __attribute ((__unused__));
 722      tree node __attribute ((__unused__));
 723      int indent __attribute ((__unused__));
 724 {
 725 }
 726
 727 void
 728 print_lang_identifier (file, node, indent)
 729      FILE *file __attribute ((__unused__));
 730      tree node __attribute ((__unused__));
 731      int indent __attribute ((__unused__));
 732 {
 733 }
 734
 735 void
 736 print_lang_statistics ()
 737 {
 738 }
 739
 740 /* used by print-tree.c */
 741
 742 void
 743 lang_print_xnode (file, node, indent)
 744      FILE *file __attribute ((__unused__));
 745      tree node __attribute ((__unused__));
 746      int indent __attribute ((__unused__));
 747 {
 748 }
 749
 750 /* Return the typed-based alias set for T, which may be an expression
 751    or a type.  Return -1 if we don't do anything special.  */
 752
 753 HOST_WIDE_INT
 754 lang_get_alias_set (t)
 755      tree t ATTRIBUTE_UNUSED;
 756 {
 757   return -1;
 758 }