gcc/output.h

   1 /* Declarations for insn-output.c.  These functions are defined in recog.c,
   2    final.c, and varasm.c.
   3    Copyright (C) 1987, 1991, 1994, 1997, 1998, 1999, 2000, 2001, 2002,
   4    2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 3, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef GCC_OUTPUT_H
  23 #define GCC_OUTPUT_H
  24
  25 /* Initialize data in final at the beginning of a compilation.  */
  26 extern void init_final (const char *);
  27
  28 /* Enable APP processing of subsequent output.
  29    Used before the output from an `asm' statement.  */
  30 extern void app_enable (void);
  31
  32 /* Disable APP processing of subsequent output.
  33    Called from varasm.c before most kinds of output.  */
  34 extern void app_disable (void);
  35
  36 /* Return the number of slots filled in the current
  37    delayed branch sequence (we don't count the insn needing the
  38    delay slot).   Zero if not in a delayed branch sequence.  */
  39 extern int dbr_sequence_length (void);
  40
  41 /* Indicate that branch shortening hasn't yet been done.  */
  42 extern void init_insn_lengths (void);
  43
  44 /* Obtain the current length of an insn.  If branch shortening has been done,
  45    get its actual length.  Otherwise, get its maximum length.  */
  46 extern int get_attr_length (rtx);
  47
  48 /* Obtain the current length of an insn.  If branch shortening has been done,
  49    get its actual length.  Otherwise, get its minimum length.  */
  50 extern int get_attr_min_length (rtx);
  51
  52 /* Make a pass over all insns and compute their actual lengths by shortening
  53    any branches of variable length if possible.  */
  54 extern void shorten_branches (rtx);
  55
  56 /* Output assembler code for the start of a function,
  57    and initialize some of the variables in this file
  58    for the new function.  The label for the function and associated
  59    assembler pseudo-ops have already been output in
  60    `assemble_start_function'.  */
  61 extern void final_start_function (rtx, FILE *, int);
  62
  63 /* Output assembler code for the end of a function.
  64    For clarity, args are same as those of `final_start_function'
  65    even though not all of them are needed.  */
  66 extern void final_end_function (void);
  67
  68 /* Output assembler code for some insns: all or part of a function.  */
  69 extern void final (rtx, FILE *, int);
  70
  71 /* The final scan for one insn, INSN.  Args are same as in `final', except
  72    that INSN is the insn being scanned.  Value returned is the next insn to
  73    be scanned.  */
  74 extern rtx final_scan_insn (rtx, FILE *, int, int, int *);
  75
  76 /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
  77    subreg of.  */
  78 extern rtx alter_subreg (rtx *);
  79
  80 /* Report inconsistency between the assembler template and the operands.
  81    In an `asm', it's the user's fault; otherwise, the compiler's fault.  */
  82 extern void output_operand_lossage (const char *, ...) ATTRIBUTE_PRINTF_1;
  83
  84 /* Output a string of assembler code, substituting insn operands.
  85    Defined in final.c.  */
  86 extern void output_asm_insn (const char *, rtx *);
  87
  88 /* Compute a worst-case reference address of a branch so that it
  89    can be safely used in the presence of aligned labels.
  90    Defined in final.c.  */
  91 extern int insn_current_reference_address (rtx);
  92
  93 /* Find the alignment associated with a CODE_LABEL.
  94    Defined in final.c.  */
  95 extern int label_to_alignment (rtx);
  96
  97 /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol.  */
  98 extern void output_asm_label (rtx);
  99
 100 /* Print a memory reference operand for address X
 101    using machine-dependent assembler syntax.  */
 102 extern void output_address (rtx);
 103
 104 /* Print an integer constant expression in assembler syntax.
 105    Addition and subtraction are the only arithmetic
 106    that may appear in these expressions.  */
 107 extern void output_addr_const (FILE *, rtx);
 108
 109 /* Output a string of assembler code, substituting numbers, strings
 110    and fixed syntactic prefixes.  */
 111 #if GCC_VERSION >= 3004
 112 #define ATTRIBUTE_ASM_FPRINTF(m, n) __attribute__ ((__format__ (__asm_fprintf__, m, n))) ATTRIBUTE_NONNULL(m)
 113 /* This is a magic identifier which allows GCC to figure out the type
 114    of HOST_WIDE_INT for %wd specifier checks.  You must issue this
 115    typedef before using the __asm_fprintf__ format attribute.  */
 116 typedef HOST_WIDE_INT __gcc_host_wide_int__;
 117 #else
 118 #define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
 119 #endif
 120
 121 extern void asm_fprintf (FILE *file, const char *p, ...)
 122      ATTRIBUTE_ASM_FPRINTF(2, 3);
 123
 124 /* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
 125    words.  */
 126 extern void split_double (rtx, rtx *, rtx *);
 127
 128 /* Return nonzero if this function has no function calls.  */
 129 extern int leaf_function_p (void);
 130
 131 /* Return 1 if branch is a forward branch.
 132    Uses insn_shuid array, so it works only in the final pass.  May be used by
 133    output templates to add branch prediction hints, for example.  */
 134 extern int final_forward_branch_p (rtx);
 135
 136 /* Return 1 if this function uses only the registers that can be
 137    safely renumbered.  */
 138 extern int only_leaf_regs_used (void);
 139
 140 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
 141    available in leaf functions.  */
 142 extern void leaf_renumber_regs_insn (rtx);
 143
 144 /* Locate the proper template for the given insn-code.  */
 145 extern const char *get_insn_template (int, rtx);
 146
 147 /* Functions in varasm.c.  */
 148
 149 /* Declare DECL to be a weak symbol.  */
 150 extern void declare_weak (tree);
 151 /* Merge weak status.  */
 152 extern void merge_weak (tree, tree);
 153
 154 /* Emit any pending weak declarations.  */
 155 extern void weak_finish (void);
 156
 157 /* Emit any pending emutls declarations and initializations.  */
 158 extern void emutls_finish (void);
 159
 160 /* Decode an `asm' spec for a declaration as a register name.
 161    Return the register number, or -1 if nothing specified,
 162    or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
 163    or -3 if ASMSPEC is `cc' and is not recognized,
 164    or -4 if ASMSPEC is `memory' and is not recognized.
 165    Accept an exact spelling or a decimal number.
 166    Prefixes such as % are optional.  */
 167 extern int decode_reg_name (const char *);
 168
 169 extern void assemble_alias (tree, tree);
 170
 171 extern void default_assemble_visibility (tree, int);
 172
 173 /* Output a string of literal assembler code
 174    for an `asm' keyword used between functions.  */
 175 extern void assemble_asm (tree);
 176
 177 /* Output assembler code for the constant pool of a function and associated
 178    with defining the name of the function.  DECL describes the function.
 179    NAME is the function's name.  For the constant pool, we use the current
 180    constant pool data.  */
 181 extern void assemble_start_function (tree, const char *);
 182
 183 /* Output assembler code associated with defining the size of the
 184    function.  DECL describes the function.  NAME is the function's name.  */
 185 extern void assemble_end_function (tree, const char *);
 186
 187 /* Assemble everything that is needed for a variable or function declaration.
 188    Not used for automatic variables, and not used for function definitions.
 189    Should not be called for variables of incomplete structure type.
 190
 191    TOP_LEVEL is nonzero if this variable has file scope.
 192    AT_END is nonzero if this is the special handling, at end of compilation,
 193    to define things that have had only tentative definitions.
 194    DONT_OUTPUT_DATA if nonzero means don't actually output the
 195    initial value (that will be done by the caller).  */
 196 extern void assemble_variable (tree, int, int, int);
 197
 198 /* Compute the alignment of variable specified by DECL.
 199    DONT_OUTPUT_DATA is from assemble_variable.  */
 200 extern void align_variable (tree decl, bool dont_output_data);
 201
 202 /* Queue for outputting something to declare an external symbol to the
 203    assembler.  (Most assemblers don't need this, so we normally output
 204    nothing.)  Do nothing if DECL is not external.  */
 205 extern void assemble_external (tree);
 206
 207 /* Assemble code to leave SIZE bytes of zeros.  */
 208 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 209
 210 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 211 extern void assemble_align (int);
 212
 213 /* Assemble a string constant with the specified C string as contents.  */
 214 extern void assemble_string (const char *, int);
 215
 216 /* Similar, for calling a library function FUN.  */
 217 extern void assemble_external_libcall (rtx);
 218
 219 /* Assemble a label named NAME.  */
 220 extern void assemble_label (const char *);
 221
 222 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 223    starts with a *, the rest of NAME is output verbatim.  Otherwise
 224    NAME is transformed in a target-specific way (usually by the
 225    addition of an underscore).  */
 226 extern void assemble_name_raw (FILE *, const char *);
 227
 228 /* Like assemble_name_raw, but should be used when NAME might refer to
 229    an entity that is also represented as a tree (like a function or
 230    variable).  If NAME does refer to such an entity, that entity will
 231    be marked as referenced.  */
 232 extern void assemble_name (FILE *, const char *);
 233
 234 /* Return the assembler directive for creating a given kind of integer
 235    object.  SIZE is the number of bytes in the object and ALIGNED_P
 236    indicates whether it is known to be aligned.  Return NULL if the
 237    assembly dialect has no such directive.
 238
 239    The returned string should be printed at the start of a new line and
 240    be followed immediately by the object's initial value.  */
 241 extern const char *integer_asm_op (int, int);
 242
 243 /* Use directive OP to assemble an integer object X.  Print OP at the
 244    start of the line, followed immediately by the value of X.  */
 245 extern void assemble_integer_with_op (const char *, rtx);
 246
 247 /* The default implementation of the asm_out.integer target hook.  */
 248 extern bool default_assemble_integer (rtx, unsigned int, int);
 249
 250 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 251    the alignment of the integer in bits.  Return 1 if we were able to output
 252    the constant, otherwise 0.  If FORCE is nonzero the constant must
 253    be outputable. */
 254 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 255
 256 /* An interface to assemble_integer for the common case in which a value is
 257    fully aligned and must be printed.  VALUE is the value of the integer
 258    object and SIZE is the number of bytes it contains.  */
 259 #define assemble_aligned_integer(SIZE, VALUE) \
 260   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 261
 262 #ifdef REAL_VALUE_TYPE_SIZE
 263 /* Assemble the floating-point constant D into an object of size MODE.  */
 264 extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
 265 #endif
 266
 267 /* Write the address of the entity given by SYMBOL to SEC.  */
 268 extern void assemble_addr_to_section (rtx, section *);
 269
 270 /* Return the size of the constant pool.  */
 271 extern int get_pool_size (void);
 272
 273 #ifdef HAVE_peephole
 274 extern rtx peephole (rtx);
 275 #endif
 276
 277 extern void output_shared_constant_pool (void);
 278
 279 extern void output_object_blocks (void);
 280
 281 /* Whether a constructor CTOR is a valid static constant initializer if all
 282    its elements are.  This used to be internal to initializer_constant_valid_p
 283    and has been exposed to let other functions like categorize_ctor_elements
 284    evaluate the property while walking a constructor for other purposes.  */
 285
 286 extern bool constructor_static_from_elts_p (const_tree);
 287
 288 /* Return nonzero if VALUE is a valid constant-valued expression
 289    for use in initializing a static variable; one that can be an
 290    element of a "constant" initializer.
 291
 292    Return null_pointer_node if the value is absolute;
 293    if it is relocatable, return the variable that determines the relocation.
 294    We assume that VALUE has been folded as much as possible;
 295    therefore, we do not need to check for such things as
 296    arithmetic-combinations of integers.  */
 297 extern tree initializer_constant_valid_p (tree, tree);
 298
 299 /* Output assembler code for constant EXP to FILE, with no label.
 300    This includes the pseudo-op such as ".int" or ".byte", and a newline.
 301    Assumes output_addressed_constants has been done on EXP already.
 302
 303    Generate exactly SIZE bytes of assembler data, padding at the end
 304    with zeros if necessary.  SIZE must always be specified.
 305
 306    ALIGN is the alignment in bits that may be assumed for the data.  */
 307 extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
 308
 309 /* When outputting delayed branch sequences, this rtx holds the
 310    sequence being output.  It is null when no delayed branch
 311    sequence is being output, so it can be used as a test in the
 312    insn output code.
 313
 314    This variable is defined  in final.c.  */
 315 extern rtx final_sequence;
 316
 317 /* The line number of the beginning of the current function.  Various
 318    md code needs this so that it can output relative linenumbers.  */
 319
 320 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 321 extern int sdb_begin_function_line;
 322 #endif
 323
 324 /* File in which assembler code is being written.  */
 325
 326 #ifdef BUFSIZ
 327 extern FILE *asm_out_file;
 328 #endif
 329
 330 /* The first global object in the file.  */
 331 extern const char *first_global_object_name;
 332
 333 /* The first weak object in the file.  */
 334 extern const char *weak_global_object_name;
 335
 336 /* Nonzero if function being compiled doesn't contain any calls
 337    (ignoring the prologue and epilogue).  This is set prior to
 338    local register allocation and is valid for the remaining
 339    compiler passes.  */
 340
 341 extern int current_function_is_leaf;
 342
 343 /* Nonzero if function being compiled doesn't modify the stack pointer
 344    (ignoring the prologue and epilogue).  This is only valid after
 345    pass_stack_ptr_mod has run.  */
 346
 347 extern int current_function_sp_is_unchanging;
 348
 349 /* Nonzero if the function being compiled is a leaf function which only
 350    uses leaf registers.  This is valid after reload (specifically after
 351    sched2) and is useful only if the port defines LEAF_REGISTERS.  */
 352
 353 extern int current_function_uses_only_leaf_regs;
 354
 355 /* Default file in which to dump debug output.  */
 356
 357 #ifdef BUFSIZ
 358 extern FILE *dump_file;
 359 #endif
 360
 361 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 362 extern rtx current_insn_predicate;
 363
 364 /* Last insn processed by final_scan_insn.  */
 365 extern rtx current_output_insn;
 366
 367 /* Nonzero while outputting an `asm' with operands.
 368    This means that inconsistencies are the user's fault, so don't die.
 369    The precise value is the insn being output, to pass to error_for_asm.  */
 370 extern rtx this_is_asm_operands;
 371
 372 /* Carry information from ASM_DECLARE_OBJECT_NAME
 373    to ASM_FINISH_DECLARE_OBJECT.  */
 374 extern int size_directive_output;
 375 extern tree last_assemble_variable_decl;
 376
 377 extern bool first_function_block_is_cold;
 378
 379 /* Decide whether DECL needs to be in a writable section.
 380    RELOC is the same as for SELECT_SECTION.  */
 381 extern bool decl_readonly_section (const_tree, int);
 382
 383 /* This can be used to compute RELOC for the function above, when
 384    given a constant expression.  */
 385 extern int compute_reloc_for_constant (tree);
 386
 387 /* User label prefix in effect for this compilation.  */
 388 extern const char *user_label_prefix;
 389
 390 /* Default target function prologue and epilogue assembler output.  */
 391 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
 392
 393 /* Default target hook that outputs nothing to a stream.  */
 394 extern void no_asm_to_stream (FILE *);
 395
 396 /* Flags controlling properties of a section.  */
 397 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 398 #define SECTION_CODE     0x00100        /* contains code */
 399 #define SECTION_WRITE    0x00200        /* data is writable */
 400 #define SECTION_DEBUG    0x00400        /* contains debug data */
 401 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 402 #define SECTION_SMALL    0x01000        /* contains "small data" */
 403 #define SECTION_BSS      0x02000        /* contains zeros only */
 404 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 405 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 406 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 407                                            embedded zeros */
 408 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 409 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 410 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 411 #define SECTION_DECLARED 0x100000       /* section has been used */
 412 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 413 #define SECTION_COMMON   0x800000       /* contains common data */
 414 #define SECTION_MACH_DEP 0x1000000      /* subsequent bits reserved for target */
 415
 416 /* This SECTION_STYLE is used for unnamed sections that we can switch
 417    to using a special assembler directive.  */
 418 #define SECTION_UNNAMED  0x000000
 419
 420 /* This SECTION_STYLE is used for named sections that we can switch
 421    to using a general section directive.  */
 422 #define SECTION_NAMED    0x200000
 423
 424 /* This SECTION_STYLE is used for sections that we cannot switch to at
 425    all.  The choice of section is implied by the directive that we use
 426    to declare the object.  */
 427 #define SECTION_NOSWITCH 0x400000
 428
 429 /* A helper function for default_elf_select_section and
 430    default_elf_unique_section.  Categorizes the DECL.  */
 431
 432 enum section_category
 433 {
 434   SECCAT_TEXT,
 435
 436   SECCAT_RODATA,
 437   SECCAT_RODATA_MERGE_STR,
 438   SECCAT_RODATA_MERGE_STR_INIT,
 439   SECCAT_RODATA_MERGE_CONST,
 440   SECCAT_SRODATA,
 441
 442   SECCAT_DATA,
 443
 444   /* To optimize loading of shared programs, define following subsections
 445      of data section:
 446         _REL    Contains data that has relocations, so they get grouped
 447                 together and dynamic linker will visit fewer pages in memory.
 448         _RO     Contains data that is otherwise read-only.  This is useful
 449                 with prelinking as most relocations won't be dynamically
 450                 linked and thus stay read only.
 451         _LOCAL  Marks data containing relocations only to local objects.
 452                 These relocations will get fully resolved by prelinking.  */
 453   SECCAT_DATA_REL,
 454   SECCAT_DATA_REL_LOCAL,
 455   SECCAT_DATA_REL_RO,
 456   SECCAT_DATA_REL_RO_LOCAL,
 457
 458   SECCAT_SDATA,
 459   SECCAT_TDATA,
 460
 461   SECCAT_BSS,
 462   SECCAT_SBSS,
 463   SECCAT_TBSS
 464 };
 465
 466 /* Information that is provided by all instances of the section type.  */
 467 struct section_common GTY(()) {
 468   /* The set of SECTION_* flags that apply to this section.  */
 469   unsigned int flags;
 470 };
 471
 472 /* Information about a SECTION_NAMED section.  */
 473 struct named_section GTY(()) {
 474   struct section_common common;
 475
 476   /* The name of the section.  */
 477   const char *name;
 478
 479   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 480      section is associated.  */
 481   tree decl;
 482 };
 483
 484 /* A callback that writes the assembly code for switching to an unnamed
 485    section.  The argument provides callback-specific data.  */
 486 typedef void (*unnamed_section_callback) (const void *);
 487
 488 /* Information about a SECTION_UNNAMED section.  */
 489 struct unnamed_section GTY(()) {
 490   struct section_common common;
 491
 492   /* The callback used to switch to the section, and the data that
 493      should be passed to the callback.  */
 494   unnamed_section_callback GTY ((skip)) callback;
 495   const void *GTY ((skip)) data;
 496
 497   /* The next entry in the chain of unnamed sections.  */
 498   section *next;
 499 };
 500
 501 /* A callback that writes the assembly code for a decl in a
 502    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 503    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 504    in bytes and ROUNDED is that size rounded up to the next
 505    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 506
 507    Return true if the callback used DECL_ALIGN to set the object's
 508    alignment.  A false return value implies that we are relying
 509    on the rounded size to align the decl.  */
 510 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 511                                            unsigned HOST_WIDE_INT size,
 512                                            unsigned HOST_WIDE_INT rounded);
 513
 514 /* Information about a SECTION_NOSWITCH section.  */
 515 struct noswitch_section GTY(()) {
 516   struct section_common common;
 517
 518   /* The callback used to assemble decls in this section.  */
 519   noswitch_section_callback GTY ((skip)) callback;
 520 };
 521
 522 /* Information about a section, which may be named or unnamed.  */
 523 union section GTY ((desc ("SECTION_STYLE (&(%h))")))
 524 {
 525   struct section_common GTY ((skip)) common;
 526   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 527   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 528   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 529 };
 530
 531 /* Return the style of section SECT.  */
 532 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 533
 534 struct object_block;
 535
 536 /* Special well-known sections.  */
 537 extern GTY(()) section *text_section;
 538 extern GTY(()) section *data_section;
 539 extern GTY(()) section *readonly_data_section;
 540 extern GTY(()) section *sdata_section;
 541 extern GTY(()) section *ctors_section;
 542 extern GTY(()) section *dtors_section;
 543 extern GTY(()) section *bss_section;
 544 extern GTY(()) section *sbss_section;
 545 extern GTY(()) section *exception_section;
 546 extern GTY(()) section *eh_frame_section;
 547 extern GTY(()) section *tls_comm_section;
 548 extern GTY(()) section *comm_section;
 549 extern GTY(()) section *lcomm_section;
 550 extern GTY(()) section *bss_noswitch_section;
 551
 552 extern GTY(()) section *in_section;
 553 extern GTY(()) bool in_cold_section_p;
 554
 555 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 556                                      const void *);
 557 extern section *get_section (const char *, unsigned int, tree);
 558 extern section *get_named_section (tree, const char *, int);
 559 extern void place_block_symbol (rtx);
 560 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 561                                enum tls_model);
 562 extern section *mergeable_constant_section (enum machine_mode,
 563                                             unsigned HOST_WIDE_INT,
 564                                             unsigned int);
 565 extern section *function_section (tree);
 566 extern section *unlikely_text_section (void);
 567 extern section *current_function_section (void);
 568
 569 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
 570    not) section for PRIORITY.  */
 571 extern section *get_cdtor_priority_section (int, bool);
 572
 573 extern bool unlikely_text_section_p (section *);
 574 extern void switch_to_section (section *);
 575 extern void output_section_asm_op (const void *);
 576
 577 extern unsigned int default_section_type_flags (tree, const char *, int);
 578
 579 extern bool have_global_bss_p (void);
 580 extern void default_no_named_section (const char *, unsigned int, tree);
 581 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 582 extern enum section_category categorize_decl_for_section (const_tree, int);
 583 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 584 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 585
 586 extern void default_stabs_asm_out_destructor (rtx, int);
 587 extern void default_named_section_asm_out_destructor (rtx, int);
 588 extern void default_dtor_section_asm_out_destructor (rtx, int);
 589 extern void default_stabs_asm_out_constructor (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);
 597 extern section *default_no_function_rodata_section (tree);
 598 extern section *default_select_rtx_section (enum machine_mode, rtx,
 599                                             unsigned HOST_WIDE_INT);
 600 extern section *default_elf_select_rtx_section (enum machine_mode, rtx,
 601                                                 unsigned HOST_WIDE_INT);
 602 extern void default_encode_section_info (tree, rtx, int);
 603 extern const char *default_strip_name_encoding (const char *);
 604 extern void default_asm_output_anchor (rtx);
 605 extern bool default_use_anchors_for_symbol_p (const_rtx);
 606 extern bool default_binds_local_p (const_tree);
 607 extern bool default_binds_local_p_1 (const_tree, int);
 608 extern void default_globalize_label (FILE *, const char *);
 609 extern void default_globalize_decl_name (FILE *, tree);
 610 extern void default_emit_unwind_label (FILE *, tree, int, int);
 611 extern void default_emit_except_table_label (FILE *);
 612 extern void default_internal_label (FILE *, const char *, unsigned long);
 613 extern void default_file_start (void);
 614 extern void file_end_indicate_exec_stack (void);
 615 extern bool default_valid_pointer_mode (enum machine_mode);
 616
 617 extern void default_elf_asm_output_external (FILE *file, tree,
 618                                              const char *);
 619 extern int maybe_assemble_visibility (tree);
 620
 621 extern int default_address_cost (rtx);
 622
 623 /* dbxout helper functions */
 624 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
 625
 626 extern void dbxout_int (int);
 627 extern void dbxout_stabd (int, int);
 628 extern void dbxout_begin_stabn (int);
 629 extern void dbxout_begin_stabn_sline (int);
 630 extern void dbxout_begin_empty_stabs (int);
 631 extern void dbxout_begin_simple_stabs (const char *, int);
 632 extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
 633
 634 extern void dbxout_stab_value_zero (void);
 635 extern void dbxout_stab_value_label (const char *);
 636 extern void dbxout_stab_value_label_diff (const char *, const char *);
 637 extern void dbxout_stab_value_internal_label (const char *, int *);
 638 extern void dbxout_stab_value_internal_label_diff (const char *, int *,
 639                                                    const char *);
 640
 641 #endif
 642
 643 #endif /* ! GCC_OUTPUT_H */