20180-12-08 Steven G. Kargl <kargl@gcc.gnu.org>
[official-gcc.git] / gcc / langhooks.c
blob9d7c2d3425d3d1e7929ce69837290bd662fcde31
1 /* Default language-specific hooks.
2 Copyright (C) 2001-2018 Free Software Foundation, Inc.
3 Contributed by Alexandre Oliva <aoliva@redhat.com>
5 This file is part of GCC.
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.
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.
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/>. */
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"
39 /* Do nothing; in many cases the default hook. */
41 void
42 lhd_do_nothing (void)
46 /* Do nothing (tree). */
48 void
49 lhd_do_nothing_t (tree ARG_UNUSED (t))
53 /* Pass through (tree). */
54 tree
55 lhd_pass_through_t (tree t)
57 return t;
60 /* Do nothing (int, int, int). Return NULL_TREE. */
62 tree
63 lhd_do_nothing_iii_return_null_tree (int ARG_UNUSED (i),
64 int ARG_UNUSED (j),
65 int ARG_UNUSED (k))
67 return NULL_TREE;
70 /* Do nothing (function). */
72 void
73 lhd_do_nothing_f (struct function * ARG_UNUSED (f))
77 /* Do nothing (return NULL_TREE). */
79 tree
80 lhd_return_null_tree (tree ARG_UNUSED (t))
82 return NULL_TREE;
85 /* Do nothing (return NULL_TREE). */
87 tree
88 lhd_return_null_const_tree (const_tree ARG_UNUSED (t))
90 return NULL_TREE;
93 /* The default post options hook. */
95 bool
96 lhd_post_options (const char ** ARG_UNUSED (pfilename))
98 /* Excess precision other than "fast" requires front-end
99 support. */
100 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST;
101 return false;
104 /* Called from by print-tree.c. */
106 void
107 lhd_print_tree_nothing (FILE * ARG_UNUSED (file),
108 tree ARG_UNUSED (node),
109 int ARG_UNUSED (indent))
113 /* Called from check_global_declaration. */
115 bool
116 lhd_warn_unused_global_decl (const_tree decl)
118 /* This is what used to exist in check_global_declaration. Probably
119 not many of these actually apply to non-C languages. */
121 if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl))
122 return false;
123 if (VAR_P (decl) && TREE_READONLY (decl))
124 return false;
125 if (DECL_IN_SYSTEM_HEADER (decl))
126 return false;
128 return true;
131 /* Set the DECL_ASSEMBLER_NAME for DECL. */
132 void
133 lhd_set_decl_assembler_name (tree decl)
135 tree id;
137 /* set_decl_assembler_name may be called on TYPE_DECL to record ODR
138 name for C++ types. By default types have no ODR names. */
139 if (TREE_CODE (decl) == TYPE_DECL)
140 return;
142 /* The language-independent code should never use the
143 DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and
144 VAR_DECLs for variables with static storage duration need a real
145 DECL_ASSEMBLER_NAME. */
146 gcc_assert (TREE_CODE (decl) == FUNCTION_DECL
147 || (VAR_P (decl)
148 && (TREE_STATIC (decl)
149 || DECL_EXTERNAL (decl)
150 || TREE_PUBLIC (decl))));
152 /* By default, assume the name to use in assembly code is the same
153 as that used in the source language. (That's correct for C, and
154 GCC used to set DECL_ASSEMBLER_NAME to the same value as
155 DECL_NAME in build_decl, so this choice provides backwards
156 compatibility with existing front-ends. This assumption is wrapped
157 in a target hook, to allow for target-specific modification of the
158 identifier.
160 Can't use just the variable's own name for a variable whose scope
161 is less than the whole compilation. Concatenate a distinguishing
162 number - we use the DECL_UID. */
164 if (TREE_PUBLIC (decl) || DECL_FILE_SCOPE_P (decl))
165 id = targetm.mangle_decl_assembler_name (decl, DECL_NAME (decl));
166 else
168 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
169 char *label;
171 ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl));
172 id = get_identifier (label);
175 SET_DECL_ASSEMBLER_NAME (decl, id);
178 /* Forcibly overwrite the DECL_ASSEMBLER_NAME for DECL to NAME. */
179 void
180 lhd_overwrite_decl_assembler_name (tree decl, tree name)
182 DECL_ASSEMBLER_NAME_RAW (decl) = name;
185 /* Type promotion for variable arguments. */
186 tree
187 lhd_type_promotes_to (tree ARG_UNUSED (type))
189 gcc_unreachable ();
192 /* Registration of machine- or os-specific builtin types. */
193 void
194 lhd_register_builtin_type (tree ARG_UNUSED (type),
195 const char * ARG_UNUSED (name))
199 /* Invalid use of an incomplete type. */
200 void
201 lhd_incomplete_type_error (location_t ARG_UNUSED (loc),
202 const_tree ARG_UNUSED (value), const_tree type)
204 gcc_assert (TREE_CODE (type) == ERROR_MARK);
205 return;
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. */
211 alias_set_type
212 lhd_get_alias_set (tree ARG_UNUSED (t))
214 return -1;
217 /* This is the default decl_printable_name function. */
219 const char *
220 lhd_decl_printable_name (tree decl, int ARG_UNUSED (verbosity))
222 gcc_assert (decl && DECL_NAME (decl));
223 return IDENTIFIER_POINTER (DECL_NAME (decl));
226 /* This is the default dwarf_name function. */
228 const char *
229 lhd_dwarf_name (tree t, int verbosity)
231 gcc_assert (DECL_P (t));
233 return lang_hooks.decl_printable_name (t, verbosity);
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. */
241 lhd_types_compatible_p (tree x, tree y)
243 return TYPE_MAIN_VARIANT (x) == TYPE_MAIN_VARIANT (y);
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. */
250 bool
251 lhd_tree_dump_dump_tree (void *di ATTRIBUTE_UNUSED, tree t ATTRIBUTE_UNUSED)
253 return false;
256 /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a
257 language-specific way. */
260 lhd_tree_dump_type_quals (const_tree t)
262 return TYPE_QUALS (t);
265 /* lang_hooks.gimplify_expr re-writes *EXPR_P into GIMPLE form. */
268 lhd_gimplify_expr (tree *expr_p ATTRIBUTE_UNUSED,
269 gimple_seq *pre_p ATTRIBUTE_UNUSED,
270 gimple_seq *post_p ATTRIBUTE_UNUSED)
272 return GS_UNHANDLED;
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,
277 tcc_exceptional or tcc_type. The default expects never to be called. */
278 size_t
279 lhd_tree_size (enum tree_code c ATTRIBUTE_UNUSED)
281 gcc_unreachable ();
284 /* Return true if decl, which is a function decl, may be called by a
285 sibcall. */
287 bool
288 lhd_decl_ok_for_sibcall (const_tree decl ATTRIBUTE_UNUSED)
290 return true;
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. */
297 void
298 global_decl_processing (void)
300 tree globals, decl, *vec;
301 int len, i;
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. */
309 globals = lang_hooks.decls.getdecls ();
310 len = list_length (globals);
311 vec = XNEWVEC (tree, len);
313 /* Process the decls in reverse order--earliest first.
314 Put them into VEC from back to front, then take out from front. */
316 for (i = 0, decl = globals; i < len; i++, decl = DECL_CHAIN (decl))
317 vec[len - i - 1] = decl;
319 wrapup_global_declarations (vec, len);
320 timevar_stop (TV_PHASE_DEFERRED);
322 timevar_start (TV_PHASE_PARSING);
323 free (vec);
326 /* Called to perform language-specific initialization of CTX. */
327 void
328 lhd_initialize_diagnostics (diagnostic_context *ctx ATTRIBUTE_UNUSED)
332 /* Called to register dumps. */
333 void
334 lhd_register_dumps (gcc::dump_manager *)
338 /* Called to perform language-specific options initialization. */
339 void
340 lhd_init_options (unsigned int decoded_options_count ATTRIBUTE_UNUSED,
341 struct cl_decoded_option *decoded_options ATTRIBUTE_UNUSED)
345 /* By default, always complain about options for the wrong language. */
346 bool
347 lhd_complain_wrong_lang_p (const struct cl_option *option ATTRIBUTE_UNUSED)
349 return true;
352 /* By default, no language-specific options are valid. */
353 bool
354 lhd_handle_option (size_t code ATTRIBUTE_UNUSED,
355 const char *arg ATTRIBUTE_UNUSED,
356 HOST_WIDE_INT value ATTRIBUTE_UNUSED,
357 int kind ATTRIBUTE_UNUSED,
358 location_t loc ATTRIBUTE_UNUSED,
359 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
361 return false;
364 /* The default function to print out name of current function that caused
365 an error. */
366 void
367 lhd_print_error_function (diagnostic_context *context, const char *file,
368 diagnostic_info *diagnostic)
370 if (diagnostic_last_function_changed (context, diagnostic))
372 char *old_prefix = pp_take_prefix (context->printer);
373 tree abstract_origin = diagnostic_abstract_origin (diagnostic);
374 char *new_prefix = (file && abstract_origin == NULL)
375 ? file_name_as_prefix (context, file) : NULL;
377 pp_set_prefix (context->printer, new_prefix);
379 if (current_function_decl == NULL)
380 pp_printf (context->printer, _("At top level:"));
381 else
383 tree fndecl, ao;
385 if (abstract_origin)
387 ao = BLOCK_ABSTRACT_ORIGIN (abstract_origin);
388 gcc_assert (TREE_CODE (ao) == FUNCTION_DECL);
389 fndecl = ao;
391 else
392 fndecl = current_function_decl;
394 if (TREE_CODE (TREE_TYPE (fndecl)) == METHOD_TYPE)
395 pp_printf
396 (context->printer, _("In member function %qs"),
397 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
398 else
399 pp_printf
400 (context->printer, _("In function %qs"),
401 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
403 while (abstract_origin)
405 location_t *locus;
406 tree block = abstract_origin;
408 locus = &BLOCK_SOURCE_LOCATION (block);
409 fndecl = NULL;
410 block = BLOCK_SUPERCONTEXT (block);
411 while (block && TREE_CODE (block) == BLOCK
412 && BLOCK_ABSTRACT_ORIGIN (block))
414 ao = BLOCK_ABSTRACT_ORIGIN (block);
415 if (TREE_CODE (ao) == FUNCTION_DECL)
417 fndecl = ao;
418 break;
420 else if (TREE_CODE (ao) != BLOCK)
421 break;
423 block = BLOCK_SUPERCONTEXT (block);
425 if (fndecl)
426 abstract_origin = block;
427 else
429 while (block && TREE_CODE (block) == BLOCK)
430 block = BLOCK_SUPERCONTEXT (block);
432 if (block && TREE_CODE (block) == FUNCTION_DECL)
433 fndecl = block;
434 abstract_origin = NULL;
436 if (fndecl)
438 expanded_location s = expand_location (*locus);
439 pp_comma (context->printer);
440 pp_newline (context->printer);
441 if (s.file != NULL)
443 if (context->show_column)
444 pp_printf (context->printer,
445 _(" inlined from %qs at %r%s:%d:%d%R"),
446 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)),
447 "locus", s.file, s.line, s.column);
448 else
449 pp_printf (context->printer,
450 _(" inlined from %qs at %r%s:%d%R"),
451 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)),
452 "locus", s.file, s.line);
455 else
456 pp_printf (context->printer, _(" inlined from %qs"),
457 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
460 pp_colon (context->printer);
463 diagnostic_set_last_function (context, diagnostic);
464 pp_newline_and_flush (context->printer);
465 context->printer->prefix = old_prefix;
466 free ((char*) new_prefix);
470 tree
471 lhd_make_node (enum tree_code code)
473 return make_node (code);
476 /* Default implementation of LANG_HOOKS_TYPE_FOR_SIZE.
477 Return an integer type with PRECISION bits of precision,
478 that is unsigned if UNSIGNEDP is nonzero, otherwise signed. */
480 tree
481 lhd_type_for_size (unsigned precision, int unsignedp)
483 int i;
485 if (precision == TYPE_PRECISION (integer_type_node))
486 return unsignedp ? unsigned_type_node : integer_type_node;
488 if (precision == TYPE_PRECISION (signed_char_type_node))
489 return unsignedp ? unsigned_char_type_node : signed_char_type_node;
491 if (precision == TYPE_PRECISION (short_integer_type_node))
492 return unsignedp ? short_unsigned_type_node : short_integer_type_node;
494 if (precision == TYPE_PRECISION (long_integer_type_node))
495 return unsignedp ? long_unsigned_type_node : long_integer_type_node;
497 if (precision == TYPE_PRECISION (long_long_integer_type_node))
498 return unsignedp
499 ? long_long_unsigned_type_node
500 : long_long_integer_type_node;
502 for (i = 0; i < NUM_INT_N_ENTS; i ++)
503 if (int_n_enabled_p[i]
504 && precision == int_n_data[i].bitsize)
505 return (unsignedp ? int_n_trees[i].unsigned_type
506 : int_n_trees[i].signed_type);
508 if (precision <= TYPE_PRECISION (intQI_type_node))
509 return unsignedp ? unsigned_intQI_type_node : intQI_type_node;
511 if (precision <= TYPE_PRECISION (intHI_type_node))
512 return unsignedp ? unsigned_intHI_type_node : intHI_type_node;
514 if (precision <= TYPE_PRECISION (intSI_type_node))
515 return unsignedp ? unsigned_intSI_type_node : intSI_type_node;
517 if (precision <= TYPE_PRECISION (intDI_type_node))
518 return unsignedp ? unsigned_intDI_type_node : intDI_type_node;
520 if (precision <= TYPE_PRECISION (intTI_type_node))
521 return unsignedp ? unsigned_intTI_type_node : intTI_type_node;
523 return NULL_TREE;
526 HOST_WIDE_INT
527 lhd_to_target_charset (HOST_WIDE_INT c)
529 return c;
532 tree
533 lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED)
535 return expr;
538 /* Return sharing kind if OpenMP sharing attribute of DECL is
539 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
541 enum omp_clause_default_kind
542 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED)
544 if (DECL_ARTIFICIAL (decl))
545 return OMP_CLAUSE_DEFAULT_SHARED;
546 return OMP_CLAUSE_DEFAULT_UNSPECIFIED;
549 /* Generate code to copy SRC to DST. */
551 tree
552 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src)
554 return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src);
557 /* Finalize clause C. */
559 void
560 lhd_omp_finish_clause (tree, gimple_seq *)
564 /* Return true if DECL is a scalar variable (for the purpose of
565 implicit firstprivatization). */
567 bool
568 lhd_omp_scalar_p (tree decl)
570 tree type = TREE_TYPE (decl);
571 if (TREE_CODE (type) == REFERENCE_TYPE)
572 type = TREE_TYPE (type);
573 if (TREE_CODE (type) == COMPLEX_TYPE)
574 type = TREE_TYPE (type);
575 if (INTEGRAL_TYPE_P (type)
576 || SCALAR_FLOAT_TYPE_P (type)
577 || TREE_CODE (type) == POINTER_TYPE)
578 return true;
579 return false;
582 /* Register language specific type size variables as potentially OpenMP
583 firstprivate variables. */
585 void
586 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *c ATTRIBUTE_UNUSED,
587 tree t ATTRIBUTE_UNUSED)
591 /* Return true if TYPE is an OpenMP mappable type. */
593 bool
594 lhd_omp_mappable_type (tree type)
596 /* Mappable type has to be complete. */
597 if (type == error_mark_node || !COMPLETE_TYPE_P (type))
598 return false;
599 return true;
602 /* Common function for add_builtin_function and
603 add_builtin_function_ext_scope. */
604 static tree
605 add_builtin_function_common (const char *name,
606 tree type,
607 int function_code,
608 enum built_in_class cl,
609 const char *library_name,
610 tree attrs,
611 tree (*hook) (tree))
613 tree id = get_identifier (name);
614 tree decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, id, type);
616 TREE_PUBLIC (decl) = 1;
617 DECL_EXTERNAL (decl) = 1;
618 DECL_BUILT_IN_CLASS (decl) = cl;
620 DECL_FUNCTION_CODE (decl) = (enum built_in_function) function_code;
622 /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */
623 gcc_assert (DECL_FUNCTION_CODE (decl) == function_code);
625 if (library_name)
627 tree libname = get_identifier (library_name);
629 libname = targetm.mangle_decl_assembler_name (decl, libname);
630 SET_DECL_ASSEMBLER_NAME (decl, libname);
633 /* Possibly apply some default attributes to this built-in function. */
634 if (attrs)
635 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
636 else
637 decl_attributes (&decl, NULL_TREE, 0);
639 return hook (decl);
643 /* Create a builtin function. */
645 tree
646 add_builtin_function (const char *name,
647 tree type,
648 int function_code,
649 enum built_in_class cl,
650 const char *library_name,
651 tree attrs)
653 return add_builtin_function_common (name, type, function_code, cl,
654 library_name, attrs,
655 lang_hooks.builtin_function);
658 /* Like add_builtin_function, but make sure the scope is the external scope.
659 This is used to delay putting in back end builtin functions until the ISA
660 that defines the builtin is declared via function specific target options,
661 which can save memory for machines like the x86_64 that have multiple ISAs.
662 If this points to the same function as builtin_function, the backend must
663 add all of the builtins at program initialization time. */
665 tree
666 add_builtin_function_ext_scope (const char *name,
667 tree type,
668 int function_code,
669 enum built_in_class cl,
670 const char *library_name,
671 tree attrs)
673 return add_builtin_function_common (name, type, function_code, cl,
674 library_name, attrs,
675 lang_hooks.builtin_function_ext_scope);
678 tree
679 lhd_builtin_function (tree decl)
681 lang_hooks.decls.pushdecl (decl);
682 return decl;
685 /* Create a builtin type. */
687 tree
688 add_builtin_type (const char *name, tree type)
690 tree id = get_identifier (name);
691 tree decl = build_decl (BUILTINS_LOCATION, TYPE_DECL, id, type);
692 return lang_hooks.decls.pushdecl (decl);
695 /* LTO hooks. */
697 /* Used to save and restore any previously active section. */
698 static section *saved_section;
701 /* Begin a new LTO output section named NAME. This default implementation
702 saves the old section and emits assembly code to switch to the new
703 section. */
705 void
706 lhd_begin_section (const char *name)
708 section *section;
710 /* Save the old section so we can restore it in lto_end_asm_section. */
711 gcc_assert (!saved_section);
712 saved_section = in_section;
713 if (!saved_section)
714 saved_section = text_section;
716 /* Create a new section and switch to it. */
717 section = get_section (name, SECTION_DEBUG | SECTION_EXCLUDE, NULL);
718 switch_to_section (section);
722 /* Write DATA of length LEN to the current LTO output section. This default
723 implementation just calls assemble_string. */
725 void
726 lhd_append_data (const void *data, size_t len, void *)
728 if (data)
730 timevar_push (TV_IPA_LTO_OUTPUT);
731 assemble_string ((const char *)data, len);
732 timevar_pop (TV_IPA_LTO_OUTPUT);
737 /* Finish the current LTO output section. This default implementation emits
738 assembly code to switch to any section previously saved by
739 lhd_begin_section. */
741 void
742 lhd_end_section (void)
744 if (saved_section)
746 switch_to_section (saved_section);
747 saved_section = NULL;
751 /* Default implementation of enum_underlying_base_type using type_for_size. */
753 tree
754 lhd_enum_underlying_base_type (const_tree enum_type)
756 return lang_hooks.types.type_for_size (TYPE_PRECISION (enum_type),
757 TYPE_UNSIGNED (enum_type));
760 /* Default implementation of LANG_HOOKS_GET_SUBSTRING_LOCATION. */
762 const char *
763 lhd_get_substring_location (const substring_loc &, location_t *)
765 return "unimplemented";
768 /* Default implementation of LANG_HOOKS_DECL_DWARF_ATTRIBUTE. Don't add
769 any attributes. */
772 lhd_decl_dwarf_attribute (const_tree, int)
774 return -1;
777 /* Default implementation of LANG_HOOKS_TYPE_DWARF_ATTRIBUTE. Don't add
778 any attributes. */
781 lhd_type_dwarf_attribute (const_tree, int)
783 return -1;
786 /* Default implementation of LANG_HOOKS_UNIT_SIZE_WITHOUT_REUSABLE_PADDING.
787 Just return TYPE_SIZE_UNIT unadjusted. */
789 tree
790 lhd_unit_size_without_reusable_padding (tree t)
792 return TYPE_SIZE_UNIT (t);
795 /* Returns true if the current lang_hooks represents the GNU C frontend. */
797 bool
798 lang_GNU_C (void)
800 return (strncmp (lang_hooks.name, "GNU C", 5) == 0
801 && (lang_hooks.name[5] == '\0' || ISDIGIT (lang_hooks.name[5])));
804 /* Returns true if the current lang_hooks represents the GNU C++ frontend. */
806 bool
807 lang_GNU_CXX (void)
809 return strncmp (lang_hooks.name, "GNU C++", 7) == 0;
812 /* Returns true if the current lang_hooks represents the GNU Fortran frontend. */
814 bool
815 lang_GNU_Fortran (void)
817 return strncmp (lang_hooks.name, "GNU Fortran", 11) == 0;
820 /* Returns true if the current lang_hooks represents the GNU Objective-C
821 frontend. */
823 bool
824 lang_GNU_OBJC (void)
826 return strncmp (lang_hooks.name, "GNU Objective-C", 15) == 0;