poly_int: expand_vector_ubsan_overflow
[official-gcc.git] / gcc / langhooks.c
blob0fab9d5c06876a3ddd9776e9301b4dd824e1e6f7
1 /* Default language-specific hooks.
2 Copyright (C) 2001-2017 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 int value ATTRIBUTE_UNUSED, int kind ATTRIBUTE_UNUSED,
357 location_t loc ATTRIBUTE_UNUSED,
358 const struct cl_option_handlers *handlers ATTRIBUTE_UNUSED)
360 return false;
363 /* The default function to print out name of current function that caused
364 an error. */
365 void
366 lhd_print_error_function (diagnostic_context *context, const char *file,
367 diagnostic_info *diagnostic)
369 if (diagnostic_last_function_changed (context, diagnostic))
371 const char *old_prefix = context->printer->prefix;
372 tree abstract_origin = diagnostic_abstract_origin (diagnostic);
373 char *new_prefix = (file && abstract_origin == NULL)
374 ? file_name_as_prefix (context, file) : NULL;
376 pp_set_prefix (context->printer, new_prefix);
378 if (current_function_decl == NULL)
379 pp_printf (context->printer, _("At top level:"));
380 else
382 tree fndecl, ao;
384 if (abstract_origin)
386 ao = BLOCK_ABSTRACT_ORIGIN (abstract_origin);
387 while (TREE_CODE (ao) == BLOCK
388 && BLOCK_ABSTRACT_ORIGIN (ao)
389 && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
390 ao = BLOCK_ABSTRACT_ORIGIN (ao);
391 gcc_assert (TREE_CODE (ao) == FUNCTION_DECL);
392 fndecl = ao;
394 else
395 fndecl = current_function_decl;
397 if (TREE_CODE (TREE_TYPE (fndecl)) == METHOD_TYPE)
398 pp_printf
399 (context->printer, _("In member function %qs"),
400 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
401 else
402 pp_printf
403 (context->printer, _("In function %qs"),
404 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
406 while (abstract_origin)
408 location_t *locus;
409 tree block = abstract_origin;
411 locus = &BLOCK_SOURCE_LOCATION (block);
412 fndecl = NULL;
413 block = BLOCK_SUPERCONTEXT (block);
414 while (block && TREE_CODE (block) == BLOCK
415 && BLOCK_ABSTRACT_ORIGIN (block))
417 ao = BLOCK_ABSTRACT_ORIGIN (block);
419 while (TREE_CODE (ao) == BLOCK
420 && BLOCK_ABSTRACT_ORIGIN (ao)
421 && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
422 ao = BLOCK_ABSTRACT_ORIGIN (ao);
424 if (TREE_CODE (ao) == FUNCTION_DECL)
426 fndecl = ao;
427 break;
429 else if (TREE_CODE (ao) != BLOCK)
430 break;
432 block = BLOCK_SUPERCONTEXT (block);
434 if (fndecl)
435 abstract_origin = block;
436 else
438 while (block && TREE_CODE (block) == BLOCK)
439 block = BLOCK_SUPERCONTEXT (block);
441 if (block && TREE_CODE (block) == FUNCTION_DECL)
442 fndecl = block;
443 abstract_origin = NULL;
445 if (fndecl)
447 expanded_location s = expand_location (*locus);
448 pp_comma (context->printer);
449 pp_newline (context->printer);
450 if (s.file != NULL)
452 if (context->show_column)
453 pp_printf (context->printer,
454 _(" inlined from %qs at %r%s:%d:%d%R"),
455 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)),
456 "locus", s.file, s.line, s.column);
457 else
458 pp_printf (context->printer,
459 _(" inlined from %qs at %r%s:%d%R"),
460 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)),
461 "locus", s.file, s.line);
464 else
465 pp_printf (context->printer, _(" inlined from %qs"),
466 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2)));
469 pp_colon (context->printer);
472 diagnostic_set_last_function (context, diagnostic);
473 pp_newline_and_flush (context->printer);
474 context->printer->prefix = old_prefix;
475 free ((char*) new_prefix);
479 tree
480 lhd_make_node (enum tree_code code)
482 return make_node (code);
485 /* Default implementation of LANG_HOOKS_TYPE_FOR_SIZE.
486 Return an integer type with PRECISION bits of precision,
487 that is unsigned if UNSIGNEDP is nonzero, otherwise signed. */
489 tree
490 lhd_type_for_size (unsigned precision, int unsignedp)
492 int i;
494 if (precision == TYPE_PRECISION (integer_type_node))
495 return unsignedp ? unsigned_type_node : integer_type_node;
497 if (precision == TYPE_PRECISION (signed_char_type_node))
498 return unsignedp ? unsigned_char_type_node : signed_char_type_node;
500 if (precision == TYPE_PRECISION (short_integer_type_node))
501 return unsignedp ? short_unsigned_type_node : short_integer_type_node;
503 if (precision == TYPE_PRECISION (long_integer_type_node))
504 return unsignedp ? long_unsigned_type_node : long_integer_type_node;
506 if (precision == TYPE_PRECISION (long_long_integer_type_node))
507 return unsignedp
508 ? long_long_unsigned_type_node
509 : long_long_integer_type_node;
511 for (i = 0; i < NUM_INT_N_ENTS; i ++)
512 if (int_n_enabled_p[i]
513 && precision == int_n_data[i].bitsize)
514 return (unsignedp ? int_n_trees[i].unsigned_type
515 : int_n_trees[i].signed_type);
517 if (precision <= TYPE_PRECISION (intQI_type_node))
518 return unsignedp ? unsigned_intQI_type_node : intQI_type_node;
520 if (precision <= TYPE_PRECISION (intHI_type_node))
521 return unsignedp ? unsigned_intHI_type_node : intHI_type_node;
523 if (precision <= TYPE_PRECISION (intSI_type_node))
524 return unsignedp ? unsigned_intSI_type_node : intSI_type_node;
526 if (precision <= TYPE_PRECISION (intDI_type_node))
527 return unsignedp ? unsigned_intDI_type_node : intDI_type_node;
529 if (precision <= TYPE_PRECISION (intTI_type_node))
530 return unsignedp ? unsigned_intTI_type_node : intTI_type_node;
532 return NULL_TREE;
535 HOST_WIDE_INT
536 lhd_to_target_charset (HOST_WIDE_INT c)
538 return c;
541 tree
542 lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED)
544 return expr;
547 /* Return sharing kind if OpenMP sharing attribute of DECL is
548 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */
550 enum omp_clause_default_kind
551 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED)
553 if (DECL_ARTIFICIAL (decl))
554 return OMP_CLAUSE_DEFAULT_SHARED;
555 return OMP_CLAUSE_DEFAULT_UNSPECIFIED;
558 /* Generate code to copy SRC to DST. */
560 tree
561 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src)
563 return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src);
566 /* Finalize clause C. */
568 void
569 lhd_omp_finish_clause (tree, gimple_seq *)
573 /* Return true if DECL is a scalar variable (for the purpose of
574 implicit firstprivatization). */
576 bool
577 lhd_omp_scalar_p (tree decl)
579 tree type = TREE_TYPE (decl);
580 if (TREE_CODE (type) == REFERENCE_TYPE)
581 type = TREE_TYPE (type);
582 if (TREE_CODE (type) == COMPLEX_TYPE)
583 type = TREE_TYPE (type);
584 if (INTEGRAL_TYPE_P (type)
585 || SCALAR_FLOAT_TYPE_P (type)
586 || TREE_CODE (type) == POINTER_TYPE)
587 return true;
588 return false;
591 /* Register language specific type size variables as potentially OpenMP
592 firstprivate variables. */
594 void
595 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *c ATTRIBUTE_UNUSED,
596 tree t ATTRIBUTE_UNUSED)
600 /* Return true if TYPE is an OpenMP mappable type. */
602 bool
603 lhd_omp_mappable_type (tree type)
605 /* Mappable type has to be complete. */
606 if (type == error_mark_node || !COMPLETE_TYPE_P (type))
607 return false;
608 return true;
611 /* Common function for add_builtin_function and
612 add_builtin_function_ext_scope. */
613 static tree
614 add_builtin_function_common (const char *name,
615 tree type,
616 int function_code,
617 enum built_in_class cl,
618 const char *library_name,
619 tree attrs,
620 tree (*hook) (tree))
622 tree id = get_identifier (name);
623 tree decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, id, type);
625 TREE_PUBLIC (decl) = 1;
626 DECL_EXTERNAL (decl) = 1;
627 DECL_BUILT_IN_CLASS (decl) = cl;
629 DECL_FUNCTION_CODE (decl) = (enum built_in_function) function_code;
631 /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */
632 gcc_assert (DECL_FUNCTION_CODE (decl) == function_code);
634 if (library_name)
636 tree libname = get_identifier (library_name);
638 libname = targetm.mangle_decl_assembler_name (decl, libname);
639 SET_DECL_ASSEMBLER_NAME (decl, libname);
642 /* Possibly apply some default attributes to this built-in function. */
643 if (attrs)
644 decl_attributes (&decl, attrs, ATTR_FLAG_BUILT_IN);
645 else
646 decl_attributes (&decl, NULL_TREE, 0);
648 return hook (decl);
652 /* Create a builtin function. */
654 tree
655 add_builtin_function (const char *name,
656 tree type,
657 int function_code,
658 enum built_in_class cl,
659 const char *library_name,
660 tree attrs)
662 return add_builtin_function_common (name, type, function_code, cl,
663 library_name, attrs,
664 lang_hooks.builtin_function);
667 /* Like add_builtin_function, but make sure the scope is the external scope.
668 This is used to delay putting in back end builtin functions until the ISA
669 that defines the builtin is declared via function specific target options,
670 which can save memory for machines like the x86_64 that have multiple ISAs.
671 If this points to the same function as builtin_function, the backend must
672 add all of the builtins at program initialization time. */
674 tree
675 add_builtin_function_ext_scope (const char *name,
676 tree type,
677 int function_code,
678 enum built_in_class cl,
679 const char *library_name,
680 tree attrs)
682 return add_builtin_function_common (name, type, function_code, cl,
683 library_name, attrs,
684 lang_hooks.builtin_function_ext_scope);
687 tree
688 lhd_builtin_function (tree decl)
690 lang_hooks.decls.pushdecl (decl);
691 return decl;
694 /* Create a builtin type. */
696 tree
697 add_builtin_type (const char *name, tree type)
699 tree id = get_identifier (name);
700 tree decl = build_decl (BUILTINS_LOCATION, TYPE_DECL, id, type);
701 return lang_hooks.decls.pushdecl (decl);
704 /* LTO hooks. */
706 /* Used to save and restore any previously active section. */
707 static section *saved_section;
710 /* Begin a new LTO output section named NAME. This default implementation
711 saves the old section and emits assembly code to switch to the new
712 section. */
714 void
715 lhd_begin_section (const char *name)
717 section *section;
719 /* Save the old section so we can restore it in lto_end_asm_section. */
720 gcc_assert (!saved_section);
721 saved_section = in_section;
722 if (!saved_section)
723 saved_section = text_section;
725 /* Create a new section and switch to it. */
726 section = get_section (name, SECTION_DEBUG | SECTION_EXCLUDE, NULL);
727 switch_to_section (section);
731 /* Write DATA of length LEN to the current LTO output section. This default
732 implementation just calls assemble_string. */
734 void
735 lhd_append_data (const void *data, size_t len, void *)
737 if (data)
739 timevar_push (TV_IPA_LTO_OUTPUT);
740 assemble_string ((const char *)data, len);
741 timevar_pop (TV_IPA_LTO_OUTPUT);
746 /* Finish the current LTO output section. This default implementation emits
747 assembly code to switch to any section previously saved by
748 lhd_begin_section. */
750 void
751 lhd_end_section (void)
753 if (saved_section)
755 switch_to_section (saved_section);
756 saved_section = NULL;
760 /* Default implementation of enum_underlying_base_type using type_for_size. */
762 tree
763 lhd_enum_underlying_base_type (const_tree enum_type)
765 return lang_hooks.types.type_for_size (TYPE_PRECISION (enum_type),
766 TYPE_UNSIGNED (enum_type));
769 /* Default implementation of LANG_HOOKS_GET_SUBSTRING_LOCATION. */
771 const char *
772 lhd_get_substring_location (const substring_loc &, location_t *)
774 return "unimplemented";
777 /* Default implementation of LANG_HOOKS_DECL_DWARF_ATTRIBUTE. Don't add
778 any attributes. */
781 lhd_decl_dwarf_attribute (const_tree, int)
783 return -1;
786 /* Default implementation of LANG_HOOKS_TYPE_DWARF_ATTRIBUTE. Don't add
787 any attributes. */
790 lhd_type_dwarf_attribute (const_tree, int)
792 return -1;
795 /* Default implementation of LANG_HOOKS_UNIT_SIZE_WITHOUT_REUSABLE_PADDING.
796 Just return TYPE_SIZE_UNIT unadjusted. */
798 tree
799 lhd_unit_size_without_reusable_padding (tree t)
801 return TYPE_SIZE_UNIT (t);
804 /* Returns true if the current lang_hooks represents the GNU C frontend. */
806 bool
807 lang_GNU_C (void)
809 return (strncmp (lang_hooks.name, "GNU C", 5) == 0
810 && (lang_hooks.name[5] == '\0' || ISDIGIT (lang_hooks.name[5])));
813 /* Returns true if the current lang_hooks represents the GNU C++ frontend. */
815 bool
816 lang_GNU_CXX (void)
818 return strncmp (lang_hooks.name, "GNU C++", 7) == 0;
821 /* Returns true if the current lang_hooks represents the GNU Fortran frontend. */
823 bool
824 lang_GNU_Fortran (void)
826 return strncmp (lang_hooks.name, "GNU Fortran", 11) == 0;
829 /* Returns true if the current lang_hooks represents the GNU Objective-C
830 frontend. */
832 bool
833 lang_GNU_OBJC (void)
835 return strncmp (lang_hooks.name, "GNU Objective-C", 15) == 0;