gcc/langhooks.c

   1 /* Default language-specific hooks.
   2    Copyright (C) 2001-2016 Free Software Foundation, Inc.
   3    Contributed by Alexandre Oliva  <aoliva@redhat.com>
   4
   5 This file is part of GCC.
   6
   7 GCC 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 3, or (at your option)
  10 any later version.
  11
  12 GCC 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 GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #include "config.h"
  22 #include "system.h"
  23 #include "coretypes.h"
  24 #include "target.h"
  25 #include "rtl.h"
  26 #include "tree.h"
  27 #include "timevar.h"
  28 #include "stringpool.h"
  29 #include "diagnostic.h"
  30 #include "intl.h"
  31 #include "toplev.h"
  32 #include "attribs.h"
  33 #include "gimplify.h"
  34 #include "langhooks.h"
  35 #include "tree-diagnostic.h"
  36 #include "output.h"
  37 #include "timevar.h"
  38
  39 /* Do nothing; in many cases the default hook.  */
  40
  41 void
  42 lhd_do_nothing (void)
  43 {
  44 }
  45
  46 /* Do nothing (tree).  */
  47
  48 void
  49 lhd_do_nothing_t (tree ARG_UNUSED (t))
  50 {
  51 }
  52
  53 /* Pass through (tree).  */
  54 tree
  55 lhd_pass_through_t (tree t)
  56 {
  57   return t;
  58 }
  59
  60 /* Do nothing (int, int, int).  Return NULL_TREE.  */
  61
  62 tree
  63 lhd_do_nothing_iii_return_null_tree (int ARG_UNUSED (i),
  64                                      int ARG_UNUSED (j),
  65                                      int ARG_UNUSED (k))
  66 {
  67   return NULL_TREE;
  68 }
  69
  70 /* Do nothing (function).  */
  71
  72 void
  73 lhd_do_nothing_f (struct function * ARG_UNUSED (f))
  74 {
  75 }
  76
  77 /* Do nothing (return NULL_TREE).  */
  78
  79 tree
  80 lhd_return_null_tree_v (void)
  81 {
  82   return NULL_TREE;
  83 }
  84
  85 /* Do nothing (return NULL_TREE).  */
  86
  87 tree
  88 lhd_return_null_tree (tree ARG_UNUSED (t))
  89 {
  90   return NULL_TREE;
  91 }
  92
  93 /* Do nothing (return NULL_TREE).  */
  94
  95 tree
  96 lhd_return_null_const_tree (const_tree ARG_UNUSED (t))
  97 {
  98   return NULL_TREE;
  99 }
 100
 101 /* The default post options hook.  */
 102
 103 bool
 104 lhd_post_options (const char ** ARG_UNUSED (pfilename))
 105 {
 106   /* Excess precision other than "fast" requires front-end
 107      support.  */
 108   flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
 109   return false;
 110 }
 111
 112 /* Called from by print-tree.c.  */
 113
 114 void
 115 lhd_print_tree_nothing (FILE * ARG_UNUSED (file),
 116                         tree ARG_UNUSED (node),
 117                         int ARG_UNUSED (indent))
 118 {
 119 }
 120
 121 /* Called from check_global_declaration.  */
 122
 123 bool
 124 lhd_warn_unused_global_decl (const_tree decl)
 125 {
 126   /* This is what used to exist in check_global_declaration.  Probably
 127      not many of these actually apply to non-C languages.  */
 128
 129   if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
 130     return false;
 131   if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl))
 132     return false;
 133   if (DECL_IN_SYSTEM_HEADER (decl))
 134     return false;
 135
 136   return true;
 137 }
 138
 139 /* Set the DECL_ASSEMBLER_NAME for DECL.  */
 140 void
 141 lhd_set_decl_assembler_name (tree decl)
 142 {
 143   tree id;
 144
 145   /* set_decl_assembler_name may be called on TYPE_DECL to record ODR
 146      name for C++ types.  By default types have no ODR names.  */
 147   if (TREE_CODE (decl) == TYPE_DECL)
 148     return;
 149
 150   /* The language-independent code should never use the
 151      DECL_ASSEMBLER_NAME for lots of DECLs.  Only FUNCTION_DECLs and
 152      VAR_DECLs for variables with static storage duration need a real
 153      DECL_ASSEMBLER_NAME.  */
 154   gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
 155               || (TREE_CODE (decl) == VAR_DECL
 156                   && (TREE_STATIC (decl)
 157                       || DECL_EXTERNAL (decl)
 158                       || TREE_PUBLIC (decl))));
 159
 160   /* By default, assume the name to use in assembly code is the same
 161      as that used in the source language.  (That's correct for C, and
 162      GCC used to set DECL_ASSEMBLER_NAME to the same value as
 163      DECL_NAME in build_decl, so this choice provides backwards
 164      compatibility with existing front-ends.  This assumption is wrapped
 165      in a target hook, to allow for target-specific modification of the
 166      identifier.
 167
 168      Can't use just the variable's own name for a variable whose scope
 169      is less than the whole compilation.  Concatenate a distinguishing
 170      number - we use the DECL_UID.  */
 171
 172   if (TREE_PUBLIC (decl) || DECL_FILE_SCOPE_P (decl))
 173     id = targetm.mangle_decl_assembler_name (decl, DECL_NAME (decl));
 174   else
 175     {
 176       const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
 177       char *label;
 178
 179       ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl));
 180       id = get_identifier (label);
 181     }
 182   SET_DECL_ASSEMBLER_NAME (decl, id);
 183
 184 }
 185
 186 /* Type promotion for variable arguments.  */
 187 tree
 188 lhd_type_promotes_to (tree ARG_UNUSED (type))
 189 {
 190   gcc_unreachable ();
 191 }
 192
 193 /* Registration of machine- or os-specific builtin types.  */
 194 void
 195 lhd_register_builtin_type (tree ARG_UNUSED (type),
 196                            const char * ARG_UNUSED (name))
 197 {
 198 }
 199
 200 /* Invalid use of an incomplete type.  */
 201 void
 202 lhd_incomplete_type_error (const_tree ARG_UNUSED (value), const_tree type)
 203 {
 204   gcc_assert (TREE_CODE (type) == ERROR_MARK);
 205   return;
 206 }
 207
 208 /* Provide a default routine for alias sets that always returns -1.  This
 209    is used by languages that don't need to do anything special.  */
 210
 211 alias_set_type
 212 lhd_get_alias_set (tree ARG_UNUSED (t))
 213 {
 214   return -1;
 215 }
 216
 217 /* This is the default decl_printable_name function.  */
 218
 219 const char *
 220 lhd_decl_printable_name (tree decl, int ARG_UNUSED (verbosity))
 221 {
 222   gcc_assert (decl && DECL_NAME (decl));
 223   return IDENTIFIER_POINTER (DECL_NAME (decl));
 224 }
 225
 226 /* This is the default dwarf_name function.  */
 227
 228 const char *
 229 lhd_dwarf_name (tree t, int verbosity)
 230 {
 231   gcc_assert (DECL_P (t));
 232
 233   return lang_hooks.decl_printable_name (t, verbosity);
 234 }
 235
 236 /* This compares two types for equivalence ("compatible" in C-based languages).
 237    This routine should only return 1 if it is sure.  It should not be used
 238    in contexts where erroneously returning 0 causes problems.  */
 239
 240 int
 241 lhd_types_compatible_p (tree x, tree y)
 242 {
 243   return TYPE_MAIN_VARIANT (x) == TYPE_MAIN_VARIANT (y);
 244 }
 245
 246 /* lang_hooks.tree_dump.dump_tree:  Dump language-specific parts of tree
 247    nodes.  Returns nonzero if it does not want the usual dumping of the
 248    second argument.  */
 249
 250 bool
 251 lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED)
 252 {
 253   return false;
 254 }
 255
 256 /* lang_hooks.tree_dump.type_qual:  Determine type qualifiers in a
 257    language-specific way.  */
 258
 259 int
 260 lhd_tree_dump_type_quals (const_tree t)
 261 {
 262   return TYPE_QUALS (t);
 263 }
 264
 265 /* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form.  */
 266
 267 int
 268 lhd_gimplify_expr (tree *expr_p ATTRIBUTE_UNUSED,
 269                    gimple_seq *pre_p ATTRIBUTE_UNUSED,
 270                    gimple_seq *post_p ATTRIBUTE_UNUSED)
 271 {
 272   return GS_UNHANDLED;
 273 }
 274
 275 /* lang_hooks.tree_size: Determine the size of a tree with code C,
 276    which is a language-specific tree code in category tcc_constant or
 277    tcc_exceptional.  The default expects never to be called.  */
 278 size_t
 279 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED)
 280 {
 281   gcc_unreachable ();
 282 }
 283
 284 /* Return true if decl, which is a function decl, may be called by a
 285    sibcall.  */
 286
 287 bool
 288 lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED)
 289 {
 290   return true;
 291 }
 292
 293 /* Generic global declaration processing.  This is meant to be called
 294    by the front-ends at the end of parsing.  C/C++ do their own thing,
 295    but other front-ends may call this.  */
 296
 297 void
 298 global_decl_processing (void)
 299 {
 300   tree globals, decl, *vec;
 301   int len, i;
 302
 303   timevar_stop (TV_PHASE_PARSING);
 304   timevar_start (TV_PHASE_DEFERRED);
 305   /* Really define vars that have had only a tentative definition.
 306      Really output inline functions that must actually be callable
 307      and have not been output so far.  */
 308
 309   globals = lang_hooks.decls.getdecls ();
 310   len = list_length (globals);
 311   vec = XNEWVEC (tree, len);
 312
 313   /* Process the decls in reverse order--earliest first.
 314      Put them into VEC from back to front, then take out from front.  */
 315
 316   for (i = 0, decl = globals; i < len; i++, decl = DECL_CHAIN (decl))
 317     vec[len - i - 1] = decl;
 318
 319   wrapup_global_declarations (vec, len);
 320   timevar_stop (TV_PHASE_DEFERRED);
 321
 322   timevar_start (TV_PHASE_PARSING);
 323   free (vec);
 324 }
 325
 326 /* Called to perform language-specific initialization of CTX.  */
 327 void
 328 lhd_initialize_diagnostics (diagnostic_context *ctx ATTRIBUTE_UNUSED)
 329 {
 330 }
 331
 332 /* Called to perform language-specific options initialization.  */
 333 void
 334 lhd_init_options (unsigned int decoded_options_count ATTRIBUTE_UNUSED,
 335                   struct cl_decoded_option *decoded_options ATTRIBUTE_UNUSED)
 336 {
 337 }
 338
 339 /* By default, always complain about options for the wrong language.  */
 340 bool
 341 lhd_complain_wrong_lang_p (const struct cl_option *option ATTRIBUTE_UNUSED)
 342 {
 343   return true;
 344 }
 345
 346 /* By default, no language-specific options are valid.  */
 347 bool
 348 lhd_handle_option (size_t code ATTRIBUTE_UNUSED,
 349                    const char *arg ATTRIBUTE_UNUSED,
 350                    int value ATTRIBUTE_UNUSED, int kind ATTRIBUTE_UNUSED,
 351                    location_t loc ATTRIBUTE_UNUSED,
 352                    const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
 353 {
 354   return false;
 355 }
 356
 357 /* The default function to print out name of current function that caused
 358    an error.  */
 359 void
 360 lhd_print_error_function (diagnostic_context *context, const char *file,
 361                           diagnostic_info *diagnostic)
 362 {
 363   if (diagnostic_last_function_changed (context, diagnostic))
 364     {
 365       const char *old_prefix = context->printer->prefix;
 366       tree abstract_origin = diagnostic_abstract_origin (diagnostic);
 367       char *new_prefix = (file && abstract_origin == NULL)
 368                          ? file_name_as_prefix (context, file) : NULL;
 369
 370       pp_set_prefix (context->printer, new_prefix);
 371
 372       if (current_function_decl == NULL)
 373         pp_printf (context->printer, _("At top level:"));
 374       else
 375         {
 376           tree fndecl, ao;
 377
 378           if (abstract_origin)
 379             {
 380               ao = BLOCK_ABSTRACT_ORIGIN (abstract_origin);
 381               while (TREE_CODE (ao) == BLOCK
 382                      && BLOCK_ABSTRACT_ORIGIN (ao)
 383                      && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
 384                 ao = BLOCK_ABSTRACT_ORIGIN (ao);
 385               gcc_assert (TREE_CODE (ao) == FUNCTION_DECL);
 386               fndecl = ao;
 387             }
 388           else
 389             fndecl = current_function_decl;
 390
 391           if (TREE_CODE (TREE_TYPE (fndecl)) == METHOD_TYPE)
 392             pp_printf
 393               (context->printer, _("In member function %qs"),
 394                identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
 395           else
 396             pp_printf
 397               (context->printer, _("In function %qs"),
 398                identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
 399
 400           while (abstract_origin)
 401             {
 402               location_t *locus;
 403               tree block = abstract_origin;
 404
 405               locus = &BLOCK_SOURCE_LOCATION (block);
 406               fndecl = NULL;
 407               block = BLOCK_SUPERCONTEXT (block);
 408               while (block && TREE_CODE (block) == BLOCK
 409                      && BLOCK_ABSTRACT_ORIGIN (block))
 410                 {
 411                   ao = BLOCK_ABSTRACT_ORIGIN (block);
 412
 413                   while (TREE_CODE (ao) == BLOCK
 414                          && BLOCK_ABSTRACT_ORIGIN (ao)
 415                          && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
 416                     ao = BLOCK_ABSTRACT_ORIGIN (ao);
 417
 418                   if (TREE_CODE (ao) == FUNCTION_DECL)
 419                     {
 420                       fndecl = ao;
 421                       break;
 422                     }
 423                   else if (TREE_CODE (ao) != BLOCK)
 424                     break;
 425
 426                   block = BLOCK_SUPERCONTEXT (block);
 427                 }
 428               if (fndecl)
 429                 abstract_origin = block;
 430               else
 431                 {
 432                   while (block && TREE_CODE (block) == BLOCK)
 433                     block = BLOCK_SUPERCONTEXT (block);
 434
 435                   if (block && TREE_CODE (block) == FUNCTION_DECL)
 436                     fndecl = block;
 437                   abstract_origin = NULL;
 438                 }
 439               if (fndecl)
 440                 {
 441                   expanded_location s = expand_location (*locus);
 442                   pp_comma (context->printer);
 443                   pp_newline (context->printer);
 444                   if (s.file != NULL)
 445                     {
 446                       if (context->show_column)
 447                         pp_printf (context->printer,
 448                                    _("    inlined from %qs at %r%s:%d:%d%R"),
 449                                    identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)),
 450                                    "locus", s.file, s.line, s.column);
 451                       else
 452                         pp_printf (context->printer,
 453                                    _("    inlined from %qs at %r%s:%d%R"),
 454                                    identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)),
 455                                    "locus", s.file, s.line);
 456
 457                     }
 458                   else
 459                     pp_printf (context->printer, _("    inlined from %qs"),
 460                                identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
 461                 }
 462             }
 463           pp_colon (context->printer);
 464         }
 465
 466       diagnostic_set_last_function (context, diagnostic);
 467       pp_newline_and_flush (context->printer);
 468       context->printer->prefix = old_prefix;
 469       free ((char*) new_prefix);
 470     }
 471 }
 472
 473 tree
 474 lhd_make_node (enum tree_code code)
 475 {
 476   return make_node (code);
 477 }
 478
 479 HOST_WIDE_INT
 480 lhd_to_target_charset (HOST_WIDE_INT c)
 481 {
 482   return c;
 483 }
 484
 485 tree
 486 lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED)
 487 {
 488   return expr;
 489 }
 490
 491 /* Return sharing kind if OpenMP sharing attribute of DECL is
 492    predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise.  */
 493
 494 enum omp_clause_default_kind
 495 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED)
 496 {
 497   if (DECL_ARTIFICIAL (decl))
 498     return OMP_CLAUSE_DEFAULT_SHARED;
 499   return OMP_CLAUSE_DEFAULT_UNSPECIFIED;
 500 }
 501
 502 /* Generate code to copy SRC to DST.  */
 503
 504 tree
 505 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src)
 506 {
 507   return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src);
 508 }
 509
 510 /* Finalize clause C.  */
 511
 512 void
 513 lhd_omp_finish_clause (tree, gimple_seq *)
 514 {
 515 }
 516
 517 /* Register language specific type size variables as potentially OpenMP
 518    firstprivate variables.  */
 519
 520 void
 521 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *c ATTRIBUTE_UNUSED,
 522                                    tree t ATTRIBUTE_UNUSED)
 523 {
 524 }
 525
 526 /* Return true if TYPE is an OpenMP mappable type.  */
 527
 528 bool
 529 lhd_omp_mappable_type (tree type)
 530 {
 531   /* Mappable type has to be complete.  */
 532   if (type == error_mark_node || !COMPLETE_TYPE_P (type))
 533     return false;
 534   return true;
 535 }
 536
 537 /* Common function for add_builtin_function and
 538    add_builtin_function_ext_scope.  */
 539 static tree
 540 add_builtin_function_common (const char *name,
 541                              tree type,
 542                              int function_code,
 543                              enum built_in_class cl,
 544                              const char *library_name,
 545                              tree attrs,
 546                              tree (*hook) (tree))
 547 {
 548   tree   id = get_identifier (name);
 549   tree decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, id, type);
 550
 551   TREE_PUBLIC (decl)         = 1;
 552   DECL_EXTERNAL (decl)       = 1;
 553   DECL_BUILT_IN_CLASS (decl) = cl;
 554
 555   DECL_FUNCTION_CODE (decl)  = (enum built_in_function) function_code;
 556
 557   /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits.  */
 558   gcc_assert (DECL_FUNCTION_CODE (decl) == function_code);
 559
 560   if (library_name)
 561     {
 562       tree libname = get_identifier (library_name);
 563       SET_DECL_ASSEMBLER_NAME (decl, libname);
 564     }
 565
 566   /* Possibly apply some default attributes to this built-in function.  */
 567   if (attrs)
 568     decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
 569   else
 570     decl_attributes (&decl, NULL_TREE, 0);
 571
 572   return hook (decl);
 573
 574 }
 575
 576 /* Create a builtin function.  */
 577
 578 tree
 579 add_builtin_function (const char *name,
 580                       tree type,
 581                       int function_code,
 582                       enum built_in_class cl,
 583                       const char *library_name,
 584                       tree attrs)
 585 {
 586   return add_builtin_function_common (name, type, function_code, cl,
 587                                       library_name, attrs,
 588                                       lang_hooks.builtin_function);
 589 }
 590
 591 /* Like add_builtin_function, but make sure the scope is the external scope.
 592    This is used to delay putting in back end builtin functions until the ISA
 593    that defines the builtin is declared via function specific target options,
 594    which can save memory for machines like the x86_64 that have multiple ISAs.
 595    If this points to the same function as builtin_function, the backend must
 596    add all of the builtins at program initialization time.  */
 597
 598 tree
 599 add_builtin_function_ext_scope (const char *name,
 600                                 tree type,
 601                                 int function_code,
 602                                 enum built_in_class cl,
 603                                 const char *library_name,
 604                                 tree attrs)
 605 {
 606   return add_builtin_function_common (name, type, function_code, cl,
 607                                       library_name, attrs,
 608                                       lang_hooks.builtin_function_ext_scope);
 609 }
 610
 611 tree
 612 lhd_builtin_function (tree decl)
 613 {
 614   lang_hooks.decls.pushdecl (decl);
 615   return decl;
 616 }
 617
 618 /* Create a builtin type.  */
 619
 620 tree
 621 add_builtin_type (const char *name, tree type)
 622 {
 623   tree   id = get_identifier (name);
 624   tree decl = build_decl (BUILTINS_LOCATION, TYPE_DECL, id, type);
 625   return lang_hooks.decls.pushdecl (decl);
 626 }
 627
 628 /* LTO hooks.  */
 629
 630 /* Used to save and restore any previously active section.  */
 631 static section *saved_section;
 632
 633
 634 /* Begin a new LTO output section named NAME.  This default implementation
 635    saves the old section and emits assembly code to switch to the new
 636    section.  */
 637
 638 void
 639 lhd_begin_section (const char *name)
 640 {
 641   section *section;
 642
 643   /* Save the old section so we can restore it in lto_end_asm_section.  */
 644   gcc_assert (!saved_section);
 645   saved_section = in_section;
 646   if (!saved_section)
 647     saved_section = text_section;
 648
 649   /* Create a new section and switch to it.  */
 650   section = get_section (name, SECTION_DEBUG | SECTION_EXCLUDE, NULL);
 651   switch_to_section (section);
 652 }
 653
 654
 655 /* Write DATA of length LEN to the current LTO output section.  This default
 656    implementation just calls assemble_string.  */
 657
 658 void
 659 lhd_append_data (const void *data, size_t len, void *)
 660 {
 661   if (data)
 662     {
 663       timevar_push (TV_IPA_LTO_OUTPUT);
 664       assemble_string ((const char *)data, len);
 665       timevar_pop (TV_IPA_LTO_OUTPUT);
 666     }
 667 }
 668
 669
 670 /* Finish the current LTO output section.  This default implementation emits
 671    assembly code to switch to any section previously saved by
 672    lhd_begin_section.  */
 673
 674 void
 675 lhd_end_section (void)
 676 {
 677   if (saved_section)
 678     {
 679       switch_to_section (saved_section);
 680       saved_section = NULL;
 681     }
 682 }
 683
 684 /* Default implementation of enum_underlying_base_type using type_for_size.  */
 685
 686 tree
 687 lhd_enum_underlying_base_type (const_tree enum_type)
 688 {
 689   return lang_hooks.types.type_for_size (TYPE_PRECISION (enum_type),
 690                                          TYPE_UNSIGNED (enum_type));
 691 }
 692
 693 /* Returns true if the current lang_hooks represents the GNU C frontend.  */
 694
 695 bool
 696 lang_GNU_C (void)
 697 {
 698   return (strncmp (lang_hooks.name, "GNU C", 5) == 0
 699           && (lang_hooks.name[5] == '\0' || ISDIGIT (lang_hooks.name[5])));
 700 }
 701
 702 /* Returns true if the current lang_hooks represents the GNU C++ frontend.  */
 703
 704 bool
 705 lang_GNU_CXX (void)
 706 {
 707   return strncmp (lang_hooks.name, "GNU C++", 7) == 0;
 708 }
 709
 710 /* Returns true if the current lang_hooks represents the GNU Fortran frontend.  */
 711
 712 bool
 713 lang_GNU_Fortran (void)
 714 {
 715   return strncmp (lang_hooks.name, "GNU Fortran", 11) == 0;
 716 }