1 /* Default language-specific hooks. 2 Copyright (C) 2001-2018 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 (tree ARG_UNUSED (t)) 81 { 82 return NULL_TREE; 83 } 84 85 /* Do nothing (return NULL_TREE). */ 86 87 tree 88 lhd_return_null_const_tree (const_tree ARG_UNUSED (t)) 89 { 90 return NULL_TREE; 91 } 92 93 /* The default post options hook. */ 94 95 bool 96 lhd_post_options (const char ** ARG_UNUSED (pfilename)) 97 { 98 /* Excess precision other than "fast" requires front-end 99 support. */ 100 flag_excess_precision_cmdline = EXCESS_PRECISION_FAST; 101 return false; 102 } 103 104 /* Called from by print-tree.c. */ 105 106 void 107 lhd_print_tree_nothing (FILE * ARG_UNUSED (file), 108 tree ARG_UNUSED (node), 109 int ARG_UNUSED (indent)) 110 { 111 } 112 113 /* Called from check_global_declaration. */ 114 115 bool 116 lhd_warn_unused_global_decl (const_tree decl) 117 { 118 /* This is what used to exist in check_global_declaration. Probably 119 not many of these actually apply to non-C languages. */ 120 121 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; 127 128 return true; 129 } 130 131 /* Set the DECL_ASSEMBLER_NAME for DECL. */ 132 void 133 lhd_set_decl_assembler_name (tree decl) 134 { 135 tree id; 136 137 /* 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; 141 142 /* 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)))); 151 152 /* 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. 159 160 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. */ 163 164 if (TREE_PUBLIC (decl) || DECL_FILE_SCOPE_P (decl)) 165 id = targetm.mangle_decl_assembler_name (decl, DECL_NAME (decl)); 166 else 167 { 168 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl)); 169 char *label; 170 171 ASM_FORMAT_PRIVATE_NAME (label, name, DECL_UID (decl)); 172 id = get_identifier (label); 173 } 174 175 SET_DECL_ASSEMBLER_NAME (decl, id); 176 } 177 178 /* Forcibly overwrite the DECL_ASSEMBLER_NAME for DECL to NAME. */ 179 void 180 lhd_overwrite_decl_assembler_name (tree decl, tree name) 181 { 182 DECL_ASSEMBLER_NAME_RAW (decl) = name; 183 } 184 185 /* Type promotion for variable arguments. */ 186 tree 187 lhd_type_promotes_to (tree ARG_UNUSED (type)) 188 { 189 gcc_unreachable (); 190 } 191 192 /* 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)) 196 { 197 } 198 199 /* 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) 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, 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) 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 register dumps. */ 333 void 334 lhd_register_dumps (gcc::dump_manager *) 335 { 336 } 337 338 /* 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) 342 { 343 } 344 345 /* 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) 348 { 349 return true; 350 } 351 352 /* 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) 359 { 360 return false; 361 } 362 363 /* 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) 368 { 369 if (diagnostic_last_function_changed (context, diagnostic)) 370 { 371 char *old_prefix = pp_take_prefix (context->printer); 372 tree abstract_origin = diagnostic_abstract_origin (diagnostic); 373 char *new_prefix = (file && abstract_origin == NULL) 374 ? file_name_as_prefix (context, file) : NULL; 375 376 pp_set_prefix (context->printer, new_prefix); 377 378 if (current_function_decl == NULL) 379 pp_printf (context->printer, _("At top level:")); 380 else 381 { 382 tree fndecl, ao; 383 384 if (abstract_origin) 385 { 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; 393 } 394 else 395 fndecl = current_function_decl; 396 397 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))); 405 406 while (abstract_origin) 407 { 408 location_t *locus; 409 tree block = abstract_origin; 410 411 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)) 416 { 417 ao = BLOCK_ABSTRACT_ORIGIN (block); 418 419 while (TREE_CODE (ao) == BLOCK 420 && BLOCK_ABSTRACT_ORIGIN (ao) 421 && BLOCK_ABSTRACT_ORIGIN (ao) != ao) 422 ao = BLOCK_ABSTRACT_ORIGIN (ao); 423 424 if (TREE_CODE (ao) == FUNCTION_DECL) 425 { 426 fndecl = ao; 427 break; 428 } 429 else if (TREE_CODE (ao) != BLOCK) 430 break; 431 432 block = BLOCK_SUPERCONTEXT (block); 433 } 434 if (fndecl) 435 abstract_origin = block; 436 else 437 { 438 while (block && TREE_CODE (block) == BLOCK) 439 block = BLOCK_SUPERCONTEXT (block); 440 441 if (block && TREE_CODE (block) == FUNCTION_DECL) 442 fndecl = block; 443 abstract_origin = NULL; 444 } 445 if (fndecl) 446 { 447 expanded_location s = expand_location (*locus); 448 pp_comma (context->printer); 449 pp_newline (context->printer); 450 if (s.file != NULL) 451 { 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); 462 463 } 464 else 465 pp_printf (context->printer, _(" inlined from %qs"), 466 identifier_to_locale (lang_hooks.decl_printable_name (fndecl, 2))); 467 } 468 } 469 pp_colon (context->printer); 470 } 471 472 diagnostic_set_last_function (context, diagnostic); 473 pp_newline_and_flush (context->printer); 474 context->printer->prefix = old_prefix; 475 free ((char*) new_prefix); 476 } 477 } 478 479 tree 480 lhd_make_node (enum tree_code code) 481 { 482 return make_node (code); 483 } 484 485 /* 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. */ 488 489 tree 490 lhd_type_for_size (unsigned precision, int unsignedp) 491 { 492 int i; 493 494 if (precision == TYPE_PRECISION (integer_type_node)) 495 return unsignedp ? unsigned_type_node : integer_type_node; 496 497 if (precision == TYPE_PRECISION (signed_char_type_node)) 498 return unsignedp ? unsigned_char_type_node : signed_char_type_node; 499 500 if (precision == TYPE_PRECISION (short_integer_type_node)) 501 return unsignedp ? short_unsigned_type_node : short_integer_type_node; 502 503 if (precision == TYPE_PRECISION (long_integer_type_node)) 504 return unsignedp ? long_unsigned_type_node : long_integer_type_node; 505 506 if (precision == TYPE_PRECISION (long_long_integer_type_node)) 507 return unsignedp 508 ? long_long_unsigned_type_node 509 : long_long_integer_type_node; 510 511 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); 516 517 if (precision <= TYPE_PRECISION (intQI_type_node)) 518 return unsignedp ? unsigned_intQI_type_node : intQI_type_node; 519 520 if (precision <= TYPE_PRECISION (intHI_type_node)) 521 return unsignedp ? unsigned_intHI_type_node : intHI_type_node; 522 523 if (precision <= TYPE_PRECISION (intSI_type_node)) 524 return unsignedp ? unsigned_intSI_type_node : intSI_type_node; 525 526 if (precision <= TYPE_PRECISION (intDI_type_node)) 527 return unsignedp ? unsigned_intDI_type_node : intDI_type_node; 528 529 if (precision <= TYPE_PRECISION (intTI_type_node)) 530 return unsignedp ? unsigned_intTI_type_node : intTI_type_node; 531 532 return NULL_TREE; 533 } 534 535 HOST_WIDE_INT 536 lhd_to_target_charset (HOST_WIDE_INT c) 537 { 538 return c; 539 } 540 541 tree 542 lhd_expr_to_decl (tree expr, bool *tc ATTRIBUTE_UNUSED, bool *se ATTRIBUTE_UNUSED) 543 { 544 return expr; 545 } 546 547 /* Return sharing kind if OpenMP sharing attribute of DECL is 548 predetermined, OMP_CLAUSE_DEFAULT_UNSPECIFIED otherwise. */ 549 550 enum omp_clause_default_kind 551 lhd_omp_predetermined_sharing (tree decl ATTRIBUTE_UNUSED) 552 { 553 if (DECL_ARTIFICIAL (decl)) 554 return OMP_CLAUSE_DEFAULT_SHARED; 555 return OMP_CLAUSE_DEFAULT_UNSPECIFIED; 556 } 557 558 /* Generate code to copy SRC to DST. */ 559 560 tree 561 lhd_omp_assignment (tree clause ATTRIBUTE_UNUSED, tree dst, tree src) 562 { 563 return build2 (MODIFY_EXPR, TREE_TYPE (dst), dst, src); 564 } 565 566 /* Finalize clause C. */ 567 568 void 569 lhd_omp_finish_clause (tree, gimple_seq *) 570 { 571 } 572 573 /* Return true if DECL is a scalar variable (for the purpose of 574 implicit firstprivatization). */ 575 576 bool 577 lhd_omp_scalar_p (tree decl) 578 { 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; 589 } 590 591 /* Register language specific type size variables as potentially OpenMP 592 firstprivate variables. */ 593 594 void 595 lhd_omp_firstprivatize_type_sizes (struct gimplify_omp_ctx *c ATTRIBUTE_UNUSED, 596 tree t ATTRIBUTE_UNUSED) 597 { 598 } 599 600 /* Return true if TYPE is an OpenMP mappable type. */ 601 602 bool 603 lhd_omp_mappable_type (tree type) 604 { 605 /* Mappable type has to be complete. */ 606 if (type == error_mark_node || !COMPLETE_TYPE_P (type)) 607 return false; 608 return true; 609 } 610 611 /* 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)) 621 { 622 tree id = get_identifier (name); 623 tree decl = build_decl (BUILTINS_LOCATION, FUNCTION_DECL, id, type); 624 625 TREE_PUBLIC (decl) = 1; 626 DECL_EXTERNAL (decl) = 1; 627 DECL_BUILT_IN_CLASS (decl) = cl; 628 629 DECL_FUNCTION_CODE (decl) = (enum built_in_function) function_code; 630 631 /* DECL_FUNCTION_CODE is a bitfield; verify that the value fits. */ 632 gcc_assert (DECL_FUNCTION_CODE (decl) == function_code); 633 634 if (library_name) 635 { 636 tree libname = get_identifier (library_name); 637 638 libname = targetm.mangle_decl_assembler_name (decl, libname); 639 SET_DECL_ASSEMBLER_NAME (decl, libname); 640 } 641 642 /* 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); 647 648 return hook (decl); 649 650 } 651 652 /* Create a builtin function. */ 653 654 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) 661 { 662 return add_builtin_function_common (name, type, function_code, cl, 663 library_name, attrs, 664 lang_hooks.builtin_function); 665 } 666 667 /* 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. */ 673 674 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) 681 { 682 return add_builtin_function_common (name, type, function_code, cl, 683 library_name, attrs, 684 lang_hooks.builtin_function_ext_scope); 685 } 686 687 tree 688 lhd_builtin_function (tree decl) 689 { 690 lang_hooks.decls.pushdecl (decl); 691 return decl; 692 } 693 694 /* Create a builtin type. */ 695 696 tree 697 add_builtin_type (const char *name, tree type) 698 { 699 tree id = get_identifier (name); 700 tree decl = build_decl (BUILTINS_LOCATION, TYPE_DECL, id, type); 701 return lang_hooks.decls.pushdecl (decl); 702 } 703 704 /* LTO hooks. */ 705 706 /* Used to save and restore any previously active section. */ 707 static section *saved_section; 708 709 710 /* 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. */ 713 714 void 715 lhd_begin_section (const char *name) 716 { 717 section *section; 718 719 /* 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; 724 725 /* Create a new section and switch to it. */ 726 section = get_section (name, SECTION_DEBUG | SECTION_EXCLUDE, NULL); 727 switch_to_section (section); 728 } 729 730 731 /* Write DATA of length LEN to the current LTO output section. This default 732 implementation just calls assemble_string. */ 733 734 void 735 lhd_append_data (const void *data, size_t len, void *) 736 { 737 if (data) 738 { 739 timevar_push (TV_IPA_LTO_OUTPUT); 740 assemble_string ((const char *)data, len); 741 timevar_pop (TV_IPA_LTO_OUTPUT); 742 } 743 } 744 745 746 /* 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. */ 749 750 void 751 lhd_end_section (void) 752 { 753 if (saved_section) 754 { 755 switch_to_section (saved_section); 756 saved_section = NULL; 757 } 758 } 759 760 /* Default implementation of enum_underlying_base_type using type_for_size. */ 761 762 tree 763 lhd_enum_underlying_base_type (const_tree enum_type) 764 { 765 return lang_hooks.types.type_for_size (TYPE_PRECISION (enum_type), 766 TYPE_UNSIGNED (enum_type)); 767 } 768 769 /* Default implementation of LANG_HOOKS_GET_SUBSTRING_LOCATION. */ 770 771 const char * 772 lhd_get_substring_location (const substring_loc &, location_t *) 773 { 774 return "unimplemented"; 775 } 776 777 /* Default implementation of LANG_HOOKS_DECL_DWARF_ATTRIBUTE. Don't add 778 any attributes. */ 779 780 int 781 lhd_decl_dwarf_attribute (const_tree, int) 782 { 783 return -1; 784 } 785 786 /* Default implementation of LANG_HOOKS_TYPE_DWARF_ATTRIBUTE. Don't add 787 any attributes. */ 788 789 int 790 lhd_type_dwarf_attribute (const_tree, int) 791 { 792 return -1; 793 } 794 795 /* Default implementation of LANG_HOOKS_UNIT_SIZE_WITHOUT_REUSABLE_PADDING. 796 Just return TYPE_SIZE_UNIT unadjusted. */ 797 798 tree 799 lhd_unit_size_without_reusable_padding (tree t) 800 { 801 return TYPE_SIZE_UNIT (t); 802 } 803 804 /* Returns true if the current lang_hooks represents the GNU C frontend. */ 805 806 bool 807 lang_GNU_C (void) 808 { 809 return (strncmp (lang_hooks.name, "GNU C", 5) == 0 810 && (lang_hooks.name[5] == '\0' || ISDIGIT (lang_hooks.name[5]))); 811 } 812 813 /* Returns true if the current lang_hooks represents the GNU C++ frontend. */ 814 815 bool 816 lang_GNU_CXX (void) 817 { 818 return strncmp (lang_hooks.name, "GNU C++", 7) == 0; 819 } 820 821 /* Returns true if the current lang_hooks represents the GNU Fortran frontend. */ 822 823 bool 824 lang_GNU_Fortran (void) 825 { 826 return strncmp (lang_hooks.name, "GNU Fortran", 11) == 0; 827 } 828 829 /* Returns true if the current lang_hooks represents the GNU Objective-C 830 frontend. */ 831 832 bool 833 lang_GNU_OBJC (void) 834 { 835 return strncmp (lang_hooks.name, "GNU Objective-C", 15) == 0; 836 } 837