gcc/output.h

   1 /* Declarations for insn-output.cc and other code to write to asm_out_file.
   2    These functions are defined in final.cc, and varasm.cc.
   3    Copyright (C) 1987-2024 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 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 #ifndef GCC_OUTPUT_H
  22 #define GCC_OUTPUT_H
  23
  24 /* Initialize data in final at the beginning of a compilation.  */
  25 extern void init_final (const char *);
  26
  27 /* Enable APP processing of subsequent output.
  28    Used before the output from an `asm' statement.  */
  29 extern void app_enable (void);
  30
  31 /* Disable APP processing of subsequent output.
  32    Called from varasm.cc before most kinds of output.  */
  33 extern void app_disable (void);
  34
  35 /* Return the number of slots filled in the current
  36    delayed branch sequence (we don't count the insn needing the
  37    delay slot).   Zero if not in a delayed branch sequence.  */
  38 extern int dbr_sequence_length (void);
  39
  40 /* Indicate that branch shortening hasn't yet been done.  */
  41 extern void init_insn_lengths (void);
  42
  43 /* Obtain the current length of an insn.  If branch shortening has been done,
  44    get its actual length.  Otherwise, get its maximum length.  */
  45 extern int get_attr_length (rtx_insn *);
  46
  47 /* Obtain the current length of an insn.  If branch shortening has been done,
  48    get its actual length.  Otherwise, get its minimum length.  */
  49 extern int get_attr_min_length (rtx_insn *);
  50
  51 /* Make a pass over all insns and compute their actual lengths by shortening
  52    any branches of variable length if possible.  */
  53 extern void shorten_branches (rtx_insn *);
  54
  55 const char *get_some_local_dynamic_name ();
  56
  57 /* Output assembler code for the start of a function,
  58    and initialize some of the variables in this file
  59    for the new function.  The label for the function and associated
  60    assembler pseudo-ops have already been output in
  61    `assemble_start_function'.  */
  62 extern void final_start_function (rtx_insn *, FILE *, int);
  63
  64 /* Output assembler code for the end of a function.
  65    For clarity, args are same as those of `final_start_function'
  66    even though not all of them are needed.  */
  67 extern void final_end_function (void);
  68
  69 /* Output assembler code for some insns: all or part of a function.  */
  70 extern void final (rtx_insn *, FILE *, int);
  71
  72 /* The final scan for one insn, INSN.  Args are same as in `final', except
  73    that INSN is the insn being scanned.  Value returned is the next insn to
  74    be scanned.  */
  75 extern rtx_insn *final_scan_insn (rtx_insn *, FILE *, int, int, int *);
  76
  77 /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
  78    subreg of.  */
  79 extern rtx alter_subreg (rtx *, bool);
  80
  81 /* Print an operand using machine-dependent assembler syntax.  */
  82 extern void output_operand (rtx, int);
  83
  84 /* Report inconsistency between the assembler template and the operands.
  85    In an `asm', it's the user's fault; otherwise, the compiler's fault.  */
  86 extern void output_operand_lossage (const char *, ...) ATTRIBUTE_PRINTF_1;
  87
  88 /* Output a string of assembler code, substituting insn operands.
  89    Defined in final.cc.  */
  90 extern void output_asm_insn (const char *, rtx *);
  91
  92 /* Compute a worst-case reference address of a branch so that it
  93    can be safely used in the presence of aligned labels.
  94    Defined in final.cc.  */
  95 extern int insn_current_reference_address (rtx_insn *);
  96
  97 /* Find the alignment associated with a CODE_LABEL.
  98    Defined in final.cc.  */
  99 extern align_flags label_to_alignment (rtx);
 100
 101 /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol.  */
 102 extern void output_asm_label (rtx);
 103
 104 /* Marks SYMBOL_REFs in x as referenced through use of assemble_external.  */
 105 extern void mark_symbol_refs_as_used (rtx);
 106
 107 /* Print a memory reference operand for address X with access mode MODE
 108    using machine-dependent assembler syntax.  */
 109 extern void output_address (machine_mode, rtx);
 110
 111 /* Print an integer constant expression in assembler syntax.
 112    Addition and subtraction are the only arithmetic
 113    that may appear in these expressions.  */
 114 extern void output_addr_const (FILE *, rtx);
 115
 116 /* Output a string of assembler code, substituting numbers, strings
 117    and fixed syntactic prefixes.  */
 118 #if GCC_VERSION >= 3004
 119 #define ATTRIBUTE_ASM_FPRINTF(m, n) __attribute__ ((__format__ (__asm_fprintf__, m, n))) ATTRIBUTE_NONNULL(m)
 120 #else
 121 #define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
 122 #endif
 123
 124 extern void fprint_whex (FILE *, unsigned HOST_WIDE_INT);
 125 extern void fprint_ul (FILE *, unsigned long);
 126 extern int sprint_ul (char *, unsigned long);
 127
 128 extern void asm_fprintf (FILE *file, const char *p, ...)
 129      ATTRIBUTE_ASM_FPRINTF(2, 3);
 130
 131 /* Return true if this function has no function calls.  */
 132 extern bool leaf_function_p (void);
 133
 134 /* Return true if branch is a forward branch.
 135    Uses insn_shuid array, so it works only in the final pass.  May be used by
 136    output templates to add branch prediction hints, for example.  */
 137 extern bool final_forward_branch_p (rtx_insn *);
 138
 139 /* Return true if this function uses only the registers that can be
 140    safely renumbered.  */
 141 extern bool only_leaf_regs_used (void);
 142
 143 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
 144    available in leaf functions.  */
 145 extern void leaf_renumber_regs_insn (rtx);
 146
 147 /* Locate the proper template for the given insn-code.  */
 148 extern const char *get_insn_template (int, rtx_insn *);
 149
 150 /* Functions in varasm.cc.  */
 151
 152 /* Emit any pending weak declarations.  */
 153 extern void weak_finish (void);
 154
 155 /* Decode an `asm' spec for a declaration as a register name.
 156    Return the register number, or -1 if nothing specified,
 157    or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
 158    or -3 if ASMSPEC is `cc' and is not recognized,
 159    or -4 if ASMSPEC is `memory' and is not recognized.
 160    Accept an exact spelling or a decimal number.
 161    Prefixes such as % are optional.  */
 162 extern int decode_reg_name (const char *);
 163
 164 /* Similar to decode_reg_name, but takes an extra parameter that is a
 165    pointer to the number of (internal) registers described by the
 166    external name.  */
 167 extern int decode_reg_name_and_count (const char *, int *);
 168
 169 extern void do_assemble_alias (tree, tree);
 170 extern void do_assemble_symver (tree, tree);
 171
 172 extern void default_assemble_visibility (tree, int);
 173
 174 /* Output a string of literal assembler code
 175    for an `asm' keyword used between functions.  */
 176 extern void assemble_asm (tree);
 177
 178 /* Get the function's name from a decl, as described by its RTL.  */
 179 extern const char *get_fnname_from_decl (tree);
 180
 181 /* Output function label, possibly with accompanying metadata.  No additional
 182    code or data is output after the label.  */
 183 extern void assemble_function_label_raw (FILE *, const char *);
 184
 185 /* Finish outputting function label.  Needs to be called when outputting
 186    function label without using assemble_function_label_raw ().  */
 187 extern void assemble_function_label_final (void);
 188
 189 /* Output assembler code for the constant pool of a function and associated
 190    with defining the name of the function.  DECL describes the function.
 191    NAME is the function's name.  For the constant pool, we use the current
 192    constant pool data.  */
 193 extern void assemble_start_function (tree, const char *);
 194
 195 /* Output assembler code associated with defining the size of the
 196    function.  DECL describes the function.  NAME is the function's name.  */
 197 extern void assemble_end_function (tree, const char *);
 198
 199 /* Assemble everything that is needed for a variable or function declaration.
 200    Not used for automatic variables, and not used for function definitions.
 201    Should not be called for variables of incomplete structure type.
 202
 203    TOP_LEVEL is nonzero if this variable has file scope.
 204    AT_END is nonzero if this is the special handling, at end of compilation,
 205    to define things that have had only tentative definitions.
 206    DONT_OUTPUT_DATA if nonzero means don't actually output the
 207    initial value (that will be done by the caller).  */
 208 extern void assemble_variable (tree, int, int, int);
 209
 210 /* Assemble everything that is needed for a variable declaration that has
 211    no definition in the current translation unit.  */
 212 extern void assemble_undefined_decl (tree);
 213
 214 /* Compute the alignment of variable specified by DECL.
 215    DONT_OUTPUT_DATA is from assemble_variable.  */
 216 extern void align_variable (tree decl, bool dont_output_data);
 217
 218 /* Queue for outputting something to declare an external symbol to the
 219    assembler.  (Most assemblers don't need this, so we normally output
 220    nothing.)  Do nothing if DECL is not external.  */
 221 extern void assemble_external (tree);
 222
 223 /* Assemble code to leave SIZE bytes of zeros.  */
 224 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 225
 226 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 227 extern void assemble_align (unsigned int);
 228
 229 /* Assemble a string constant with the specified C string as contents.  */
 230 extern void assemble_string (const char *, int);
 231
 232 /* Similar, for calling a library function FUN.  */
 233 extern void assemble_external_libcall (rtx);
 234
 235 /* Assemble a label named NAME.  */
 236 extern void assemble_label (FILE *, const char *);
 237
 238 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 239    starts with a *, the rest of NAME is output verbatim.  Otherwise
 240    NAME is transformed in a target-specific way (usually by the
 241    addition of an underscore).  */
 242 extern void assemble_name_raw (FILE *, const char *);
 243
 244 /* Return NAME that should actually be emitted, looking through
 245    transparent aliases.  If NAME refers to an entity that is also
 246    represented as a tree (like a function or variable), mark the entity
 247    as referenced.  */
 248 extern const char *assemble_name_resolve (const char *);
 249
 250 /* Like assemble_name_raw, but should be used when NAME might refer to
 251    an entity that is also represented as a tree (like a function or
 252    variable).  If NAME does refer to such an entity, that entity will
 253    be marked as referenced.  */
 254 extern void assemble_name (FILE *, const char *);
 255
 256 /* Return the assembler directive for creating a given kind of integer
 257    object.  SIZE is the number of bytes in the object and ALIGNED_P
 258    indicates whether it is known to be aligned.  Return NULL if the
 259    assembly dialect has no such directive.
 260
 261    The returned string should be printed at the start of a new line and
 262    be followed immediately by the object's initial value.  */
 263 extern const char *integer_asm_op (int, int);
 264
 265 /* Use directive OP to assemble an integer object X.  Print OP at the
 266    start of the line, followed immediately by the value of X.  */
 267 extern void assemble_integer_with_op (const char *, rtx);
 268
 269 /* The default implementation of the asm_out.integer target hook.  */
 270 extern bool default_assemble_integer (rtx, unsigned int, int);
 271
 272 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 273    the alignment of the integer in bits.  Return 1 if we were able to output
 274    the constant, otherwise 0.  If FORCE is nonzero the constant must
 275    be outputable. */
 276 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 277
 278 /* Return section for TEXT_SECITON_NAME if DECL or DECL_SECTION_NAME (DECL)
 279    is NULL.  */
 280 extern section *get_named_text_section (tree, const char *, const char *);
 281
 282 /* An interface to assemble_integer for the common case in which a value is
 283    fully aligned and must be printed.  VALUE is the value of the integer
 284    object and SIZE is the number of bytes it contains.  */
 285 #define assemble_aligned_integer(SIZE, VALUE) \
 286   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 287
 288 /* Assemble the floating-point constant D into an object of size MODE.  ALIGN
 289    is the alignment of the constant in bits.  If REVERSE is true, D is output
 290    in reverse storage order.  */
 291 extern void assemble_real (REAL_VALUE_TYPE, scalar_float_mode, unsigned,
 292                            bool = false);
 293
 294 /* Write the address of the entity given by SYMBOL to SEC.  */
 295 extern void assemble_addr_to_section (rtx, section *);
 296
 297 /* Return TRUE if and only if the constant pool has no entries.  Note
 298    that even entries we might end up choosing not to emit are counted
 299    here, so there is the potential for missed optimizations.  */
 300 extern bool constant_pool_empty_p (void);
 301
 302 extern rtx_insn *peephole (rtx_insn *);
 303
 304 extern void output_shared_constant_pool (void);
 305
 306 extern void output_object_blocks (void);
 307
 308 extern void output_quoted_string (FILE *, const char *);
 309
 310 /* When outputting delayed branch sequences, this rtx holds the
 311    sequence being output.  It is null when no delayed branch
 312    sequence is being output, so it can be used as a test in the
 313    insn output code.
 314
 315    This variable is defined  in final.cc.  */
 316 extern rtx_sequence *final_sequence;
 317
 318 /* File in which assembler code is being written.  */
 319
 320 #ifdef BUFSIZ
 321 extern FILE *asm_out_file;
 322 #endif
 323
 324 /* The first global object in the file.  */
 325 extern const char *first_global_object_name;
 326
 327 /* The first weak object in the file.  */
 328 extern const char *weak_global_object_name;
 329
 330 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 331 extern rtx current_insn_predicate;
 332
 333 /* Last insn processed by final_scan_insn.  */
 334 extern rtx_insn *current_output_insn;
 335
 336 /* Nonzero while outputting an `asm' with operands.
 337    This means that inconsistencies are the user's fault, so don't die.
 338    The precise value is the insn being output, to pass to error_for_asm.  */
 339 extern const rtx_insn *this_is_asm_operands;
 340
 341 /* Carry information from ASM_DECLARE_OBJECT_NAME
 342    to ASM_FINISH_DECLARE_OBJECT.  */
 343 extern int size_directive_output;
 344 extern tree last_assemble_variable_decl;
 345
 346 extern bool first_function_block_is_cold;
 347
 348 /* Decide whether DECL needs to be in a writable section.
 349    RELOC is the same as for SELECT_SECTION.  */
 350 extern bool decl_readonly_section (const_tree, int);
 351
 352 /* This can be used to compute RELOC for the function above, when
 353    given a constant expression.  */
 354 extern int compute_reloc_for_constant (tree);
 355
 356 /* This can be used to compute RELOC for get_variable_section.  */
 357 extern int compute_reloc_for_var (tree);
 358
 359 /* User label prefix in effect for this compilation.  */
 360 extern const char *user_label_prefix;
 361
 362 /* Default target function prologue and epilogue assembler output.  */
 363 extern void default_function_pro_epilogue (FILE *);
 364
 365 /* Default target function switched text sections.  */
 366 extern void default_function_switched_text_sections (FILE *, tree, bool);
 367
 368 /* Default target hook that outputs nothing to a stream.  */
 369 extern void no_asm_to_stream (FILE *);
 370
 371 /* Flags controlling properties of a section.  */
 372 enum section_flag
 373 {
 374   /* This SECTION_STYLE is used for unnamed sections that we can switch
 375      to using a special assembler directive.  */
 376   SECTION_UNNAMED = 0,
 377
 378   SECTION_ENTSIZE = (1UL << 8) - 1,     /* entity size in section */
 379   SECTION_CODE = 1UL << 8,              /* contains code */
 380   SECTION_WRITE = 1UL << 9,             /* data is writable */
 381
 382   SECTION_DEBUG = 1UL << 10,            /* contains debug data */
 383   SECTION_LINKONCE = 1UL << 11,         /* is linkonce */
 384   SECTION_SMALL = 1UL << 12,            /* contains "small data" */
 385   SECTION_BSS = 1UL << 13,              /* contains zeros only */
 386   SECTION_MERGE = 1UL << 14,            /* contains mergeable data */
 387   SECTION_STRINGS = 1UL << 15,          /* contains zero terminated strings
 388                                            without embedded zeros */
 389   SECTION_OVERRIDE = 1UL << 16,         /* allow override of default flags */
 390   SECTION_TLS = 1UL << 17,              /* contains thread-local storage */
 391   SECTION_NOTYPE = 1UL << 18,           /* don't output @progbits */
 392   SECTION_DECLARED = 1UL << 19,         /* section has been used */
 393
 394   /* This SECTION_STYLE is used for named sections that we can switch
 395      to using a general section directive.  */
 396   SECTION_NAMED = 1UL << 20,
 397
 398   /* This SECTION_STYLE is used for sections that we cannot switch to at
 399      all.  The choice of section is implied by the directive that we use
 400      to declare the object.  */
 401   SECTION_NOSWITCH = 1UL << 21,
 402
 403   /* bits used for SECTION_STYLE */
 404   SECTION_STYLE_MASK = SECTION_NAMED | SECTION_NOSWITCH,
 405
 406   SECTION_COMMON = 1UL << 22,           /* contains common data */
 407   SECTION_RELRO = 1UL << 23,            /* data is readonly after
 408                                            relocation processing */
 409   SECTION_EXCLUDE = 1UL << 24,          /* discarded by the linker */
 410   SECTION_RETAIN = 1UL << 25,           /* retained by the linker.  */
 411   SECTION_LINK_ORDER = 1UL << 26,       /* section needs link-order.  */
 412
 413   /* NB: The maximum SECTION_MACH_DEP is (1UL << 28) since AVR needs 4 bits
 414      in SECTION_MACH_DEP.  */
 415   SECTION_MACH_DEP = 1UL << 27,
 416
 417   /* subsequent bits reserved for target */
 418 };
 419
 420 /* A helper function for default_elf_select_section and
 421    default_elf_unique_section.  Categorizes the DECL.  */
 422
 423 enum section_category
 424 {
 425   SECCAT_TEXT,
 426
 427   SECCAT_RODATA,
 428   SECCAT_RODATA_MERGE_STR,
 429   SECCAT_RODATA_MERGE_STR_INIT,
 430   SECCAT_RODATA_MERGE_CONST,
 431   SECCAT_SRODATA,
 432
 433   SECCAT_DATA,
 434
 435   /* To optimize loading of shared programs, define following subsections
 436      of data section:
 437         _REL    Contains data that has relocations, so they get grouped
 438                 together and dynamic linker will visit fewer pages in memory.
 439         _RO     Contains data that is otherwise read-only.  This is useful
 440                 with prelinking as most relocations won't be dynamically
 441                 linked and thus stay read only.
 442         _LOCAL  Marks data containing relocations only to local objects.
 443                 These relocations will get fully resolved by prelinking.  */
 444   SECCAT_DATA_REL,
 445   SECCAT_DATA_REL_LOCAL,
 446   SECCAT_DATA_REL_RO,
 447   SECCAT_DATA_REL_RO_LOCAL,
 448
 449   SECCAT_SDATA,
 450   SECCAT_TDATA,
 451
 452   SECCAT_BSS,
 453   SECCAT_SBSS,
 454   SECCAT_TBSS
 455 };
 456
 457 /* Information that is provided by all instances of the section type.  */
 458 struct GTY(()) section_common {
 459   /* The set of SECTION_* flags that apply to this section.  */
 460   unsigned int flags;
 461 };
 462
 463 /* Information about a SECTION_NAMED section.  */
 464 struct GTY(()) named_section {
 465   struct section_common common;
 466
 467   /* The name of the section.  */
 468   const char *name;
 469
 470   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 471      section is associated.  */
 472   tree decl;
 473 };
 474
 475 /* A callback that writes the assembly code for switching to an unnamed
 476    section.  The argument provides callback-specific data.  */
 477 typedef void (*unnamed_section_callback) (const char *);
 478
 479 /* Information about a SECTION_UNNAMED section.  */
 480 struct GTY(()) unnamed_section {
 481   struct section_common common;
 482
 483   /* The callback used to switch to the section, and the data that
 484      should be passed to the callback.  */
 485   unnamed_section_callback GTY ((callback)) callback;
 486   const char *data;
 487
 488   /* The next entry in the chain of unnamed sections.  */
 489   section *next;
 490 };
 491
 492 /* A callback that writes the assembly code for a decl in a
 493    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 494    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 495    in bytes and ROUNDED is that size rounded up to the next
 496    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 497
 498    Return true if the callback used DECL_ALIGN to set the object's
 499    alignment.  A false return value implies that we are relying
 500    on the rounded size to align the decl.  */
 501 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 502                                            unsigned HOST_WIDE_INT size,
 503                                            unsigned HOST_WIDE_INT rounded);
 504
 505 /* Information about a SECTION_NOSWITCH section.  */
 506 struct GTY(()) noswitch_section {
 507   struct section_common common;
 508
 509   /* The callback used to assemble decls in this section.  */
 510   noswitch_section_callback GTY ((callback)) callback;
 511 };
 512
 513 /* Information about a section, which may be named or unnamed.  */
 514 union GTY ((desc ("SECTION_STYLE (&(%h))"), for_user)) section {
 515   struct section_common GTY ((skip)) common;
 516   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 517   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 518   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 519 };
 520
 521 /* Return the style of section SECT.  */
 522 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 523
 524 struct object_block;
 525
 526 /* Special well-known sections.  */
 527 extern GTY(()) section *text_section;
 528 extern GTY(()) section *data_section;
 529 extern GTY(()) section *readonly_data_section;
 530 extern GTY(()) section *sdata_section;
 531 extern GTY(()) section *ctors_section;
 532 extern GTY(()) section *dtors_section;
 533 extern GTY(()) section *bss_section;
 534 extern GTY(()) section *sbss_section;
 535 extern GTY(()) section *exception_section;
 536 extern GTY(()) section *eh_frame_section;
 537 extern GTY(()) section *tls_comm_section;
 538 extern GTY(()) section *comm_section;
 539 extern GTY(()) section *lcomm_section;
 540 extern GTY(()) section *bss_noswitch_section;
 541
 542 extern GTY(()) section *in_section;
 543 extern GTY(()) bool in_cold_section_p;
 544
 545 extern section *get_unnamed_section (unsigned int, void (*) (const char *),
 546                                      const char *);
 547 extern section *get_section (const char *, unsigned int, tree,
 548                              bool not_existing = false);
 549 extern section *get_named_section (tree, const char *, int);
 550 extern section *get_variable_section (tree, bool);
 551 extern void place_block_symbol (rtx);
 552 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 553                                enum tls_model);
 554 extern section *mergeable_constant_section (machine_mode,
 555                                             unsigned HOST_WIDE_INT,
 556                                             unsigned int);
 557 extern section *function_section (tree);
 558 extern section *unlikely_text_section (void);
 559 extern section *current_function_section (void);
 560 extern void switch_to_other_text_partition (void);
 561
 562 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
 563    not) section for PRIORITY.  */
 564 extern section *get_cdtor_priority_section (int, bool);
 565
 566 extern bool unlikely_text_section_p (section *);
 567 extern void switch_to_section (section *, tree = nullptr);
 568 extern void output_section_asm_op (const char *);
 569
 570 extern void record_tm_clone_pair (tree, tree);
 571 extern void finish_tm_clone_pairs (void);
 572 extern tree get_tm_clone_pair (tree);
 573
 574 extern void default_asm_output_source_filename (FILE *, const char *);
 575 extern void output_file_directive (FILE *, const char *);
 576
 577 extern unsigned int default_section_type_flags (tree, const char *, int);
 578
 579 extern bool have_global_bss_p (void);
 580 extern bool bss_initializer_p (const_tree, bool = false);
 581
 582 extern void default_no_named_section (const char *, unsigned int, tree);
 583 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 584 extern enum section_category categorize_decl_for_section (const_tree, int);
 585 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 586 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 587
 588 extern void default_named_section_asm_out_destructor (rtx, int);
 589 extern void default_dtor_section_asm_out_destructor (rtx, int);
 590 extern void default_named_section_asm_out_constructor (rtx, int);
 591 extern void default_ctor_section_asm_out_constructor (rtx, int);
 592
 593 extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
 594 extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
 595 extern void default_unique_section (tree, int);
 596 extern section *default_function_rodata_section (tree, bool);
 597 extern section *default_no_function_rodata_section (tree, bool);
 598 extern section *default_clone_table_section (void);
 599 extern section *default_select_rtx_section (machine_mode, rtx,
 600                                             unsigned HOST_WIDE_INT);
 601 extern section *default_elf_select_rtx_section (machine_mode, rtx,
 602                                                 unsigned HOST_WIDE_INT);
 603 extern void default_encode_section_info (tree, rtx, int);
 604 extern const char *default_strip_name_encoding (const char *);
 605 extern void default_asm_output_anchor (rtx);
 606 extern bool default_use_anchors_for_symbol_p (const_rtx);
 607 extern bool default_binds_local_p (const_tree);
 608 extern bool default_binds_local_p_1 (const_tree, int);
 609 extern bool default_binds_local_p_2 (const_tree);
 610 extern bool default_binds_local_p_3 (const_tree, bool, bool, bool, bool);
 611 extern void default_globalize_label (FILE *, const char *);
 612 extern void default_globalize_decl_name (FILE *, tree);
 613 extern void default_emit_unwind_label (FILE *, tree, int, int);
 614 extern void default_emit_except_table_label (FILE *);
 615 extern void default_generate_internal_label (char *, const char *,
 616                                              unsigned long);
 617 extern void default_internal_label (FILE *, const char *, unsigned long);
 618 extern void default_asm_declare_constant_name (FILE *, const char *,
 619                                                const_tree, HOST_WIDE_INT);
 620 extern void default_file_start (void);
 621 extern void file_end_indicate_exec_stack (void);
 622 extern void file_end_indicate_split_stack (void);
 623
 624 extern void default_elf_asm_output_external (FILE *file, tree,
 625                                              const char *);
 626 extern void default_elf_asm_output_limited_string (FILE *, const char *);
 627 extern void default_elf_asm_output_ascii (FILE *, const char *, unsigned int);
 628 extern void default_elf_internal_label (FILE *, const char *, unsigned long);
 629
 630 extern void default_elf_init_array_asm_out_constructor (rtx, int);
 631 extern void default_elf_fini_array_asm_out_destructor (rtx, int);
 632 extern bool maybe_assemble_visibility (tree);
 633
 634 extern int default_address_cost (rtx, machine_mode, addr_space_t, bool);
 635
 636 /* Stack usage.  */
 637 extern void output_stack_usage (void);
 638
 639 #endif /* ! GCC_OUTPUT_H */