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) 1987-2023 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 assembler code for the constant pool of a function and associated
 182    with defining the name of the function.  DECL describes the function.
 183    NAME is the function's name.  For the constant pool, we use the current
 184    constant pool data.  */
 185 extern void assemble_start_function (tree, const char *);
 186
 187 /* Output assembler code associated with defining the size of the
 188    function.  DECL describes the function.  NAME is the function's name.  */
 189 extern void assemble_end_function (tree, const char *);
 190
 191 /* Assemble everything that is needed for a variable or function declaration.
 192    Not used for automatic variables, and not used for function definitions.
 193    Should not be called for variables of incomplete structure type.
 194
 195    TOP_LEVEL is nonzero if this variable has file scope.
 196    AT_END is nonzero if this is the special handling, at end of compilation,
 197    to define things that have had only tentative definitions.
 198    DONT_OUTPUT_DATA if nonzero means don't actually output the
 199    initial value (that will be done by the caller).  */
 200 extern void assemble_variable (tree, int, int, int);
 201
 202 /* Assemble everything that is needed for a variable declaration that has
 203    no definition in the current translation unit.  */
 204 extern void assemble_undefined_decl (tree);
 205
 206 /* Compute the alignment of variable specified by DECL.
 207    DONT_OUTPUT_DATA is from assemble_variable.  */
 208 extern void align_variable (tree decl, bool dont_output_data);
 209
 210 /* Queue for outputting something to declare an external symbol to the
 211    assembler.  (Most assemblers don't need this, so we normally output
 212    nothing.)  Do nothing if DECL is not external.  */
 213 extern void assemble_external (tree);
 214
 215 /* Assemble code to leave SIZE bytes of zeros.  */
 216 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 217
 218 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 219 extern void assemble_align (unsigned int);
 220
 221 /* Assemble a string constant with the specified C string as contents.  */
 222 extern void assemble_string (const char *, int);
 223
 224 /* Similar, for calling a library function FUN.  */
 225 extern void assemble_external_libcall (rtx);
 226
 227 /* Assemble a label named NAME.  */
 228 extern void assemble_label (FILE *, const char *);
 229
 230 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 231    starts with a *, the rest of NAME is output verbatim.  Otherwise
 232    NAME is transformed in a target-specific way (usually by the
 233    addition of an underscore).  */
 234 extern void assemble_name_raw (FILE *, const char *);
 235
 236 /* Return NAME that should actually be emitted, looking through
 237    transparent aliases.  If NAME refers to an entity that is also
 238    represented as a tree (like a function or variable), mark the entity
 239    as referenced.  */
 240 extern const char *assemble_name_resolve (const char *);
 241
 242 /* Like assemble_name_raw, but should be used when NAME might refer to
 243    an entity that is also represented as a tree (like a function or
 244    variable).  If NAME does refer to such an entity, that entity will
 245    be marked as referenced.  */
 246 extern void assemble_name (FILE *, const char *);
 247
 248 /* Return the assembler directive for creating a given kind of integer
 249    object.  SIZE is the number of bytes in the object and ALIGNED_P
 250    indicates whether it is known to be aligned.  Return NULL if the
 251    assembly dialect has no such directive.
 252
 253    The returned string should be printed at the start of a new line and
 254    be followed immediately by the object's initial value.  */
 255 extern const char *integer_asm_op (int, int);
 256
 257 /* Use directive OP to assemble an integer object X.  Print OP at the
 258    start of the line, followed immediately by the value of X.  */
 259 extern void assemble_integer_with_op (const char *, rtx);
 260
 261 /* The default implementation of the asm_out.integer target hook.  */
 262 extern bool default_assemble_integer (rtx, unsigned int, int);
 263
 264 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 265    the alignment of the integer in bits.  Return 1 if we were able to output
 266    the constant, otherwise 0.  If FORCE is nonzero the constant must
 267    be outputable. */
 268 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 269
 270 /* Return section for TEXT_SECITON_NAME if DECL or DECL_SECTION_NAME (DECL)
 271    is NULL.  */
 272 extern section *get_named_text_section (tree, const char *, const char *);
 273
 274 /* An interface to assemble_integer for the common case in which a value is
 275    fully aligned and must be printed.  VALUE is the value of the integer
 276    object and SIZE is the number of bytes it contains.  */
 277 #define assemble_aligned_integer(SIZE, VALUE) \
 278   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 279
 280 /* Assemble the floating-point constant D into an object of size MODE.  ALIGN
 281    is the alignment of the constant in bits.  If REVERSE is true, D is output
 282    in reverse storage order.  */
 283 extern void assemble_real (REAL_VALUE_TYPE, scalar_float_mode, unsigned,
 284                            bool = false);
 285
 286 /* Write the address of the entity given by SYMBOL to SEC.  */
 287 extern void assemble_addr_to_section (rtx, section *);
 288
 289 /* Return TRUE if and only if the constant pool has no entries.  Note
 290    that even entries we might end up choosing not to emit are counted
 291    here, so there is the potential for missed optimizations.  */
 292 extern bool constant_pool_empty_p (void);
 293
 294 extern rtx_insn *peephole (rtx_insn *);
 295
 296 extern void output_shared_constant_pool (void);
 297
 298 extern void output_object_blocks (void);
 299
 300 extern void output_quoted_string (FILE *, const char *);
 301
 302 /* When outputting delayed branch sequences, this rtx holds the
 303    sequence being output.  It is null when no delayed branch
 304    sequence is being output, so it can be used as a test in the
 305    insn output code.
 306
 307    This variable is defined  in final.cc.  */
 308 extern rtx_sequence *final_sequence;
 309
 310 /* File in which assembler code is being written.  */
 311
 312 #ifdef BUFSIZ
 313 extern FILE *asm_out_file;
 314 #endif
 315
 316 /* The first global object in the file.  */
 317 extern const char *first_global_object_name;
 318
 319 /* The first weak object in the file.  */
 320 extern const char *weak_global_object_name;
 321
 322 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 323 extern rtx current_insn_predicate;
 324
 325 /* Last insn processed by final_scan_insn.  */
 326 extern rtx_insn *current_output_insn;
 327
 328 /* Nonzero while outputting an `asm' with operands.
 329    This means that inconsistencies are the user's fault, so don't die.
 330    The precise value is the insn being output, to pass to error_for_asm.  */
 331 extern const rtx_insn *this_is_asm_operands;
 332
 333 /* Carry information from ASM_DECLARE_OBJECT_NAME
 334    to ASM_FINISH_DECLARE_OBJECT.  */
 335 extern int size_directive_output;
 336 extern tree last_assemble_variable_decl;
 337
 338 extern bool first_function_block_is_cold;
 339
 340 /* Decide whether DECL needs to be in a writable section.
 341    RELOC is the same as for SELECT_SECTION.  */
 342 extern bool decl_readonly_section (const_tree, int);
 343
 344 /* This can be used to compute RELOC for the function above, when
 345    given a constant expression.  */
 346 extern int compute_reloc_for_constant (tree);
 347
 348 /* This can be used to compute RELOC for get_variable_section.  */
 349 extern int compute_reloc_for_var (tree);
 350
 351 /* User label prefix in effect for this compilation.  */
 352 extern const char *user_label_prefix;
 353
 354 /* Default target function prologue and epilogue assembler output.  */
 355 extern void default_function_pro_epilogue (FILE *);
 356
 357 /* Default target function switched text sections.  */
 358 extern void default_function_switched_text_sections (FILE *, tree, bool);
 359
 360 /* Default target hook that outputs nothing to a stream.  */
 361 extern void no_asm_to_stream (FILE *);
 362
 363 /* Flags controlling properties of a section.  */
 364 enum section_flag
 365 {
 366   /* This SECTION_STYLE is used for unnamed sections that we can switch
 367      to using a special assembler directive.  */
 368   SECTION_UNNAMED = 0,
 369
 370   SECTION_ENTSIZE = (1UL << 8) - 1,     /* entity size in section */
 371   SECTION_CODE = 1UL << 8,              /* contains code */
 372   SECTION_WRITE = 1UL << 9,             /* data is writable */
 373
 374   SECTION_DEBUG = 1UL << 10,            /* contains debug data */
 375   SECTION_LINKONCE = 1UL << 11,         /* is linkonce */
 376   SECTION_SMALL = 1UL << 12,            /* contains "small data" */
 377   SECTION_BSS = 1UL << 13,              /* contains zeros only */
 378   SECTION_MERGE = 1UL << 14,            /* contains mergeable data */
 379   SECTION_STRINGS = 1UL << 15,          /* contains zero terminated strings
 380                                            without embedded zeros */
 381   SECTION_OVERRIDE = 1UL << 16,         /* allow override of default flags */
 382   SECTION_TLS = 1UL << 17,              /* contains thread-local storage */
 383   SECTION_NOTYPE = 1UL << 18,           /* don't output @progbits */
 384   SECTION_DECLARED = 1UL << 19,         /* section has been used */
 385
 386   /* This SECTION_STYLE is used for named sections that we can switch
 387      to using a general section directive.  */
 388   SECTION_NAMED = 1UL << 20,
 389
 390   /* This SECTION_STYLE is used for sections that we cannot switch to at
 391      all.  The choice of section is implied by the directive that we use
 392      to declare the object.  */
 393   SECTION_NOSWITCH = 1UL << 21,
 394
 395   /* bits used for SECTION_STYLE */
 396   SECTION_STYLE_MASK = SECTION_NAMED | SECTION_NOSWITCH,
 397
 398   SECTION_COMMON = 1UL << 22,           /* contains common data */
 399   SECTION_RELRO = 1UL << 23,            /* data is readonly after
 400                                            relocation processing */
 401   SECTION_EXCLUDE = 1UL << 24,          /* discarded by the linker */
 402   SECTION_RETAIN = 1UL << 25,           /* retained by the linker.  */
 403   SECTION_LINK_ORDER = 1UL << 26,       /* section needs link-order.  */
 404
 405   /* NB: The maximum SECTION_MACH_DEP is (1UL << 28) since AVR needs 4 bits
 406      in SECTION_MACH_DEP.  */
 407   SECTION_MACH_DEP = 1UL << 27,
 408
 409   /* subsequent bits reserved for target */
 410 };
 411
 412 /* A helper function for default_elf_select_section and
 413    default_elf_unique_section.  Categorizes the DECL.  */
 414
 415 enum section_category
 416 {
 417   SECCAT_TEXT,
 418
 419   SECCAT_RODATA,
 420   SECCAT_RODATA_MERGE_STR,
 421   SECCAT_RODATA_MERGE_STR_INIT,
 422   SECCAT_RODATA_MERGE_CONST,
 423   SECCAT_SRODATA,
 424
 425   SECCAT_DATA,
 426
 427   /* To optimize loading of shared programs, define following subsections
 428      of data section:
 429         _REL    Contains data that has relocations, so they get grouped
 430                 together and dynamic linker will visit fewer pages in memory.
 431         _RO     Contains data that is otherwise read-only.  This is useful
 432                 with prelinking as most relocations won't be dynamically
 433                 linked and thus stay read only.
 434         _LOCAL  Marks data containing relocations only to local objects.
 435                 These relocations will get fully resolved by prelinking.  */
 436   SECCAT_DATA_REL,
 437   SECCAT_DATA_REL_LOCAL,
 438   SECCAT_DATA_REL_RO,
 439   SECCAT_DATA_REL_RO_LOCAL,
 440
 441   SECCAT_SDATA,
 442   SECCAT_TDATA,
 443
 444   SECCAT_BSS,
 445   SECCAT_SBSS,
 446   SECCAT_TBSS
 447 };
 448
 449 /* Information that is provided by all instances of the section type.  */
 450 struct GTY(()) section_common {
 451   /* The set of SECTION_* flags that apply to this section.  */
 452   unsigned int flags;
 453 };
 454
 455 /* Information about a SECTION_NAMED section.  */
 456 struct GTY(()) named_section {
 457   struct section_common common;
 458
 459   /* The name of the section.  */
 460   const char *name;
 461
 462   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 463      section is associated.  */
 464   tree decl;
 465 };
 466
 467 /* A callback that writes the assembly code for switching to an unnamed
 468    section.  The argument provides callback-specific data.  */
 469 typedef void (*unnamed_section_callback) (const char *);
 470
 471 /* Information about a SECTION_UNNAMED section.  */
 472 struct GTY(()) unnamed_section {
 473   struct section_common common;
 474
 475   /* The callback used to switch to the section, and the data that
 476      should be passed to the callback.  */
 477   unnamed_section_callback GTY ((callback)) callback;
 478   const char *data;
 479
 480   /* The next entry in the chain of unnamed sections.  */
 481   section *next;
 482 };
 483
 484 /* A callback that writes the assembly code for a decl in a
 485    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 486    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 487    in bytes and ROUNDED is that size rounded up to the next
 488    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 489
 490    Return true if the callback used DECL_ALIGN to set the object's
 491    alignment.  A false return value implies that we are relying
 492    on the rounded size to align the decl.  */
 493 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 494                                            unsigned HOST_WIDE_INT size,
 495                                            unsigned HOST_WIDE_INT rounded);
 496
 497 /* Information about a SECTION_NOSWITCH section.  */
 498 struct GTY(()) noswitch_section {
 499   struct section_common common;
 500
 501   /* The callback used to assemble decls in this section.  */
 502   noswitch_section_callback GTY ((callback)) callback;
 503 };
 504
 505 /* Information about a section, which may be named or unnamed.  */
 506 union GTY ((desc ("SECTION_STYLE (&(%h))"), for_user)) section {
 507   struct section_common GTY ((skip)) common;
 508   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 509   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 510   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 511 };
 512
 513 /* Return the style of section SECT.  */
 514 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 515
 516 struct object_block;
 517
 518 /* Special well-known sections.  */
 519 extern GTY(()) section *text_section;
 520 extern GTY(()) section *data_section;
 521 extern GTY(()) section *readonly_data_section;
 522 extern GTY(()) section *sdata_section;
 523 extern GTY(()) section *ctors_section;
 524 extern GTY(()) section *dtors_section;
 525 extern GTY(()) section *bss_section;
 526 extern GTY(()) section *sbss_section;
 527 extern GTY(()) section *exception_section;
 528 extern GTY(()) section *eh_frame_section;
 529 extern GTY(()) section *tls_comm_section;
 530 extern GTY(()) section *comm_section;
 531 extern GTY(()) section *lcomm_section;
 532 extern GTY(()) section *bss_noswitch_section;
 533
 534 extern GTY(()) section *in_section;
 535 extern GTY(()) bool in_cold_section_p;
 536
 537 extern section *get_unnamed_section (unsigned int, void (*) (const char *),
 538                                      const char *);
 539 extern section *get_section (const char *, unsigned int, tree,
 540                              bool not_existing = false);
 541 extern section *get_named_section (tree, const char *, int);
 542 extern section *get_variable_section (tree, bool);
 543 extern void place_block_symbol (rtx);
 544 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 545                                enum tls_model);
 546 extern section *mergeable_constant_section (machine_mode,
 547                                             unsigned HOST_WIDE_INT,
 548                                             unsigned int);
 549 extern section *function_section (tree);
 550 extern section *unlikely_text_section (void);
 551 extern section *current_function_section (void);
 552 extern void switch_to_other_text_partition (void);
 553
 554 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
 555    not) section for PRIORITY.  */
 556 extern section *get_cdtor_priority_section (int, bool);
 557
 558 extern bool unlikely_text_section_p (section *);
 559 extern void switch_to_section (section *, tree = nullptr);
 560 extern void output_section_asm_op (const char *);
 561
 562 extern void record_tm_clone_pair (tree, tree);
 563 extern void finish_tm_clone_pairs (void);
 564 extern tree get_tm_clone_pair (tree);
 565
 566 extern void default_asm_output_source_filename (FILE *, const char *);
 567 extern void output_file_directive (FILE *, const char *);
 568
 569 extern unsigned int default_section_type_flags (tree, const char *, int);
 570
 571 extern bool have_global_bss_p (void);
 572 extern bool bss_initializer_p (const_tree, bool = false);
 573
 574 extern void default_no_named_section (const char *, unsigned int, tree);
 575 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 576 extern enum section_category categorize_decl_for_section (const_tree, int);
 577 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 578 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 579
 580 extern void default_named_section_asm_out_destructor (rtx, int);
 581 extern void default_dtor_section_asm_out_destructor (rtx, int);
 582 extern void default_named_section_asm_out_constructor (rtx, int);
 583 extern void default_ctor_section_asm_out_constructor (rtx, int);
 584
 585 extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
 586 extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
 587 extern void default_unique_section (tree, int);
 588 extern section *default_function_rodata_section (tree, bool);
 589 extern section *default_no_function_rodata_section (tree, bool);
 590 extern section *default_clone_table_section (void);
 591 extern section *default_select_rtx_section (machine_mode, rtx,
 592                                             unsigned HOST_WIDE_INT);
 593 extern section *default_elf_select_rtx_section (machine_mode, rtx,
 594                                                 unsigned HOST_WIDE_INT);
 595 extern void default_encode_section_info (tree, rtx, int);
 596 extern const char *default_strip_name_encoding (const char *);
 597 extern void default_asm_output_anchor (rtx);
 598 extern bool default_use_anchors_for_symbol_p (const_rtx);
 599 extern bool default_binds_local_p (const_tree);
 600 extern bool default_binds_local_p_1 (const_tree, int);
 601 extern bool default_binds_local_p_2 (const_tree);
 602 extern bool default_binds_local_p_3 (const_tree, bool, bool, bool, bool);
 603 extern void default_globalize_label (FILE *, const char *);
 604 extern void default_globalize_decl_name (FILE *, tree);
 605 extern void default_emit_unwind_label (FILE *, tree, int, int);
 606 extern void default_emit_except_table_label (FILE *);
 607 extern void default_generate_internal_label (char *, const char *,
 608                                              unsigned long);
 609 extern void default_internal_label (FILE *, const char *, unsigned long);
 610 extern void default_asm_declare_constant_name (FILE *, const char *,
 611                                                const_tree, HOST_WIDE_INT);
 612 extern void default_file_start (void);
 613 extern void file_end_indicate_exec_stack (void);
 614 extern void file_end_indicate_split_stack (void);
 615
 616 extern void default_elf_asm_output_external (FILE *file, tree,
 617                                              const char *);
 618 extern void default_elf_asm_output_limited_string (FILE *, const char *);
 619 extern void default_elf_asm_output_ascii (FILE *, const char *, unsigned int);
 620 extern void default_elf_internal_label (FILE *, const char *, unsigned long);
 621
 622 extern void default_elf_init_array_asm_out_constructor (rtx, int);
 623 extern void default_elf_fini_array_asm_out_destructor (rtx, int);
 624 extern bool maybe_assemble_visibility (tree);
 625
 626 extern int default_address_cost (rtx, machine_mode, addr_space_t, bool);
 627
 628 /* Stack usage.  */
 629 extern void output_stack_usage (void);
 630
 631 #endif /* ! GCC_OUTPUT_H */