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 2, 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 COPYING.  If not, write to the Free
  20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  21 02110-1301, USA.  */
  22
  23 #ifndef GCC_OUTPUT_H
  24 #define GCC_OUTPUT_H
  25
  26 /* Initialize data in final at the beginning of a compilation.  */
  27 extern void init_final (const char *);
  28
  29 /* Enable APP processing of subsequent output.
  30    Used before the output from an `asm' statement.  */
  31 extern void app_enable (void);
  32
  33 /* Disable APP processing of subsequent output.
  34    Called from varasm.c before most kinds of output.  */
  35 extern void app_disable (void);
  36
  37 /* Return the number of slots filled in the current
  38    delayed branch sequence (we don't count the insn needing the
  39    delay slot).   Zero if not in a delayed branch sequence.  */
  40 extern int dbr_sequence_length (void);
  41
  42 /* Indicate that branch shortening hasn't yet been done.  */
  43 extern void init_insn_lengths (void);
  44
  45 /* Obtain the current length of an insn.  If branch shortening has been done,
  46    get its actual length.  Otherwise, get its maximum length.  */
  47 extern int get_attr_length (rtx);
  48
  49 /* Obtain the current length of an insn.  If branch shortening has been done,
  50    get its actual length.  Otherwise, get its minimum length.  */
  51 extern int get_attr_min_length (rtx);
  52
  53 /* Make a pass over all insns and compute their actual lengths by shortening
  54    any branches of variable length if possible.  */
  55 extern void shorten_branches (rtx);
  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, 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, 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 final_scan_insn (rtx, 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 *);
  80
  81 /* Report inconsistency between the assembler template and the operands.
  82    In an `asm', it's the user's fault; otherwise, the compiler's fault.  */
  83 extern void output_operand_lossage (const char *, ...) ATTRIBUTE_PRINTF_1;
  84
  85 /* Output a string of assembler code, substituting insn operands.
  86    Defined in final.c.  */
  87 extern void output_asm_insn (const char *, rtx *);
  88
  89 /* Compute a worst-case reference address of a branch so that it
  90    can be safely used in the presence of aligned labels.
  91    Defined in final.c.  */
  92 extern int insn_current_reference_address (rtx);
  93
  94 /* Find the alignment associated with a CODE_LABEL.
  95    Defined in final.c.  */
  96 extern int label_to_alignment (rtx);
  97
  98 /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol.  */
  99 extern void output_asm_label (rtx);
 100
 101 /* Print a memory reference operand for address X
 102    using machine-dependent assembler syntax.  */
 103 extern void output_address (rtx);
 104
 105 /* Print an integer constant expression in assembler syntax.
 106    Addition and subtraction are the only arithmetic
 107    that may appear in these expressions.  */
 108 extern void output_addr_const (FILE *, rtx);
 109
 110 /* Output a string of assembler code, substituting numbers, strings
 111    and fixed syntactic prefixes.  */
 112 #if GCC_VERSION >= 3004
 113 #define ATTRIBUTE_ASM_FPRINTF(m, n) __attribute__ ((__format__ (__asm_fprintf__, m, n))) ATTRIBUTE_NONNULL(m)
 114 /* This is a magic identifier which allows GCC to figure out the type
 115    of HOST_WIDE_INT for %wd specifier checks.  You must issue this
 116    typedef before using the __asm_fprintf__ format attribute.  */
 117 typedef HOST_WIDE_INT __gcc_host_wide_int__;
 118 #else
 119 #define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
 120 #endif
 121
 122 extern void asm_fprintf (FILE *file, const char *p, ...)
 123      ATTRIBUTE_ASM_FPRINTF(2, 3);
 124
 125 /* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
 126    words.  */
 127 extern void split_double (rtx, rtx *, rtx *);
 128
 129 /* Return nonzero if this function has no function calls.  */
 130 extern int leaf_function_p (void);
 131
 132 /* Return 1 if branch is a forward branch.
 133    Uses insn_shuid array, so it works only in the final pass.  May be used by
 134    output templates to add branch prediction hints, for example.  */
 135 extern int final_forward_branch_p (rtx);
 136
 137 /* Return 1 if this function uses only the registers that can be
 138    safely renumbered.  */
 139 extern int only_leaf_regs_used (void);
 140
 141 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
 142    available in leaf functions.  */
 143 extern void leaf_renumber_regs_insn (rtx);
 144
 145 /* Locate the proper template for the given insn-code.  */
 146 extern const char *get_insn_template (int, rtx);
 147
 148 /* Functions in varasm.c.  */
 149
 150 /* Declare DECL to be a weak symbol.  */
 151 extern void declare_weak (tree);
 152 /* Merge weak status.  */
 153 extern void merge_weak (tree, tree);
 154
 155 /* Emit any pending weak declarations.  */
 156 extern void weak_finish (void);
 157
 158 /* Emit any pending emutls declarations and initializations.  */
 159 extern void emutls_finish (void);
 160
 161 /* Decode an `asm' spec for a declaration as a register name.
 162    Return the register number, or -1 if nothing specified,
 163    or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
 164    or -3 if ASMSPEC is `cc' and is not recognized,
 165    or -4 if ASMSPEC is `memory' and is not recognized.
 166    Accept an exact spelling or a decimal number.
 167    Prefixes such as % are optional.  */
 168 extern int decode_reg_name (const char *);
 169
 170 extern void assemble_alias (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 /* Output assembler code for the constant pool of a function and associated
 179    with defining the name of the function.  DECL describes the function.
 180    NAME is the function's name.  For the constant pool, we use the current
 181    constant pool data.  */
 182 extern void assemble_start_function (tree, const char *);
 183
 184 /* Output assembler code associated with defining the size of the
 185    function.  DECL describes the function.  NAME is the function's name.  */
 186 extern void assemble_end_function (tree, const char *);
 187
 188 /* Assemble everything that is needed for a variable or function declaration.
 189    Not used for automatic variables, and not used for function definitions.
 190    Should not be called for variables of incomplete structure type.
 191
 192    TOP_LEVEL is nonzero if this variable has file scope.
 193    AT_END is nonzero if this is the special handling, at end of compilation,
 194    to define things that have had only tentative definitions.
 195    DONT_OUTPUT_DATA if nonzero means don't actually output the
 196    initial value (that will be done by the caller).  */
 197 extern void assemble_variable (tree, int, int, int);
 198
 199 /* Compute the alignment of variable specified by DECL.
 200    DONT_OUTPUT_DATA is from assemble_variable.  */
 201 extern void align_variable (tree decl, bool dont_output_data);
 202
 203 /* Queue for outputting something to declare an external symbol to the
 204    assembler.  (Most assemblers don't need this, so we normally output
 205    nothing.)  Do nothing if DECL is not external.  */
 206 extern void assemble_external (tree);
 207
 208 /* Assemble code to leave SIZE bytes of zeros.  */
 209 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 210
 211 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 212 extern void assemble_align (int);
 213
 214 /* Assemble a string constant with the specified C string as contents.  */
 215 extern void assemble_string (const char *, int);
 216
 217 /* Similar, for calling a library function FUN.  */
 218 extern void assemble_external_libcall (rtx);
 219
 220 /* Assemble a label named NAME.  */
 221 extern void assemble_label (const char *);
 222
 223 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 224    starts with a *, the rest of NAME is output verbatim.  Otherwise
 225    NAME is transformed in a target-specific way (usually by the
 226    addition of an underscore).  */
 227 extern void assemble_name_raw (FILE *, const char *);
 228
 229 /* Like assemble_name_raw, but should be used when NAME might refer to
 230    an entity that is also represented as a tree (like a function or
 231    variable).  If NAME does refer to such an entity, that entity will
 232    be marked as referenced.  */
 233 extern void assemble_name (FILE *, const char *);
 234
 235 /* Return the assembler directive for creating a given kind of integer
 236    object.  SIZE is the number of bytes in the object and ALIGNED_P
 237    indicates whether it is known to be aligned.  Return NULL if the
 238    assembly dialect has no such directive.
 239
 240    The returned string should be printed at the start of a new line and
 241    be followed immediately by the object's initial value.  */
 242 extern const char *integer_asm_op (int, int);
 243
 244 /* Use directive OP to assemble an integer object X.  Print OP at the
 245    start of the line, followed immediately by the value of X.  */
 246 extern void assemble_integer_with_op (const char *, rtx);
 247
 248 /* The default implementation of the asm_out.integer target hook.  */
 249 extern bool default_assemble_integer (rtx, unsigned int, int);
 250
 251 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 252    the alignment of the integer in bits.  Return 1 if we were able to output
 253    the constant, otherwise 0.  If FORCE is nonzero the constant must
 254    be outputable. */
 255 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 256
 257 /* An interface to assemble_integer for the common case in which a value is
 258    fully aligned and must be printed.  VALUE is the value of the integer
 259    object and SIZE is the number of bytes it contains.  */
 260 #define assemble_aligned_integer(SIZE, VALUE) \
 261   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 262
 263 #ifdef REAL_VALUE_TYPE_SIZE
 264 /* Assemble the floating-point constant D into an object of size MODE.  */
 265 extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
 266 #endif
 267
 268 /* Write the address of the entity given by SYMBOL to SEC.  */
 269 extern void assemble_addr_to_section (rtx, section *);
 270
 271 /* Return the size of the constant pool.  */
 272 extern int get_pool_size (void);
 273
 274 #ifdef HAVE_peephole
 275 extern rtx peephole (rtx);
 276 #endif
 277
 278 extern void output_shared_constant_pool (void);
 279
 280 extern void output_object_blocks (void);
 281
 282 /* Whether a constructor CTOR is a valid static constant initializer if all
 283    its elements are.  This used to be internal to initializer_constant_valid_p
 284    and has been exposed to let other functions like categorize_ctor_elements
 285    evaluate the property while walking a constructor for other purposes.  */
 286
 287 extern bool constructor_static_from_elts_p (tree);
 288
 289 /* Return nonzero if VALUE is a valid constant-valued expression
 290    for use in initializing a static variable; one that can be an
 291    element of a "constant" initializer.
 292
 293    Return null_pointer_node if the value is absolute;
 294    if it is relocatable, return the variable that determines the relocation.
 295    We assume that VALUE has been folded as much as possible;
 296    therefore, we do not need to check for such things as
 297    arithmetic-combinations of integers.  */
 298 extern tree initializer_constant_valid_p (tree, tree);
 299
 300 /* Output assembler code for constant EXP to FILE, with no label.
 301    This includes the pseudo-op such as ".int" or ".byte", and a newline.
 302    Assumes output_addressed_constants has been done on EXP already.
 303
 304    Generate exactly SIZE bytes of assembler data, padding at the end
 305    with zeros if necessary.  SIZE must always be specified.
 306
 307    ALIGN is the alignment in bits that may be assumed for the data.  */
 308 extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
 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.c.  */
 316 extern rtx final_sequence;
 317
 318 /* The line number of the beginning of the current function.  Various
 319    md code needs this so that it can output relative linenumbers.  */
 320
 321 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 322 extern int sdb_begin_function_line;
 323 #endif
 324
 325 /* File in which assembler code is being written.  */
 326
 327 #ifdef BUFSIZ
 328 extern FILE *asm_out_file;
 329 #endif
 330
 331 /* The first global object in the file.  */
 332 extern const char *first_global_object_name;
 333
 334 /* The first weak object in the file.  */
 335 extern const char *weak_global_object_name;
 336
 337 /* Nonzero if function being compiled doesn't contain any calls
 338    (ignoring the prologue and epilogue).  This is set prior to
 339    local register allocation and is valid for the remaining
 340    compiler passes.  */
 341
 342 extern int current_function_is_leaf;
 343
 344 /* Nonzero if function being compiled doesn't modify the stack pointer
 345    (ignoring the prologue and epilogue).  This is only valid after
 346    pass_stack_ptr_mod has run.  */
 347
 348 extern int current_function_sp_is_unchanging;
 349
 350 /* Nonzero if the function being compiled is a leaf function which only
 351    uses leaf registers.  This is valid after reload (specifically after
 352    sched2) and is useful only if the port defines LEAF_REGISTERS.  */
 353
 354 extern int current_function_uses_only_leaf_regs;
 355
 356 /* Default file in which to dump debug output.  */
 357
 358 #ifdef BUFSIZ
 359 extern FILE *dump_file;
 360 #endif
 361
 362 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 363 extern rtx current_insn_predicate;
 364
 365 /* Last insn processed by final_scan_insn.  */
 366 extern rtx current_output_insn;
 367
 368 /* Nonzero while outputting an `asm' with operands.
 369    This means that inconsistencies are the user's fault, so don't die.
 370    The precise value is the insn being output, to pass to error_for_asm.  */
 371 extern rtx this_is_asm_operands;
 372
 373 /* Carry information from ASM_DECLARE_OBJECT_NAME
 374    to ASM_FINISH_DECLARE_OBJECT.  */
 375 extern int size_directive_output;
 376 extern tree last_assemble_variable_decl;
 377
 378 extern bool first_function_block_is_cold;
 379
 380 /* Decide whether DECL needs to be in a writable section.
 381    RELOC is the same as for SELECT_SECTION.  */
 382 extern bool decl_readonly_section (tree, int);
 383
 384 /* This can be used to compute RELOC for the function above, when
 385    given a constant expression.  */
 386 extern int compute_reloc_for_constant (tree);
 387
 388 /* User label prefix in effect for this compilation.  */
 389 extern const char *user_label_prefix;
 390
 391 /* Default target function prologue and epilogue assembler output.  */
 392 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
 393
 394 /* Default target hook that outputs nothing to a stream.  */
 395 extern void no_asm_to_stream (FILE *);
 396
 397 /* Flags controlling properties of a section.  */
 398 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 399 #define SECTION_CODE     0x00100        /* contains code */
 400 #define SECTION_WRITE    0x00200        /* data is writable */
 401 #define SECTION_DEBUG    0x00400        /* contains debug data */
 402 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 403 #define SECTION_SMALL    0x01000        /* contains "small data" */
 404 #define SECTION_BSS      0x02000        /* contains zeros only */
 405 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 406 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 407 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 408                                            embedded zeros */
 409 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 410 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 411 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 412 #define SECTION_DECLARED 0x100000       /* section has been used */
 413 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 414 #define SECTION_COMMON   0x800000       /* contains common data */
 415 #define SECTION_MACH_DEP 0x1000000      /* subsequent bits reserved for target */
 416
 417 /* This SECTION_STYLE is used for unnamed sections that we can switch
 418    to using a special assembler directive.  */
 419 #define SECTION_UNNAMED  0x000000
 420
 421 /* This SECTION_STYLE is used for named sections that we can switch
 422    to using a general section directive.  */
 423 #define SECTION_NAMED    0x200000
 424
 425 /* This SECTION_STYLE is used for sections that we cannot switch to at
 426    all.  The choice of section is implied by the directive that we use
 427    to declare the object.  */
 428 #define SECTION_NOSWITCH 0x400000
 429
 430 /* A helper function for default_elf_select_section and
 431    default_elf_unique_section.  Categorizes the DECL.  */
 432
 433 enum section_category
 434 {
 435   SECCAT_TEXT,
 436
 437   SECCAT_RODATA,
 438   SECCAT_RODATA_MERGE_STR,
 439   SECCAT_RODATA_MERGE_STR_INIT,
 440   SECCAT_RODATA_MERGE_CONST,
 441   SECCAT_SRODATA,
 442
 443   SECCAT_DATA,
 444
 445   /* To optimize loading of shared programs, define following subsections
 446      of data section:
 447         _REL    Contains data that has relocations, so they get grouped
 448                 together and dynamic linker will visit fewer pages in memory.
 449         _RO     Contains data that is otherwise read-only.  This is useful
 450                 with prelinking as most relocations won't be dynamically
 451                 linked and thus stay read only.
 452         _LOCAL  Marks data containing relocations only to local objects.
 453                 These relocations will get fully resolved by prelinking.  */
 454   SECCAT_DATA_REL,
 455   SECCAT_DATA_REL_LOCAL,
 456   SECCAT_DATA_REL_RO,
 457   SECCAT_DATA_REL_RO_LOCAL,
 458
 459   SECCAT_SDATA,
 460   SECCAT_TDATA,
 461
 462   SECCAT_BSS,
 463   SECCAT_SBSS,
 464   SECCAT_TBSS
 465 };
 466
 467 /* Information that is provided by all instances of the section type.  */
 468 struct section_common GTY(()) {
 469   /* The set of SECTION_* flags that apply to this section.  */
 470   unsigned int flags;
 471 };
 472
 473 /* Information about a SECTION_NAMED section.  */
 474 struct named_section GTY(()) {
 475   struct section_common common;
 476
 477   /* The name of the section.  */
 478   const char *name;
 479
 480   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 481      section is associated.  */
 482   tree decl;
 483 };
 484
 485 /* A callback that writes the assembly code for switching to an unnamed
 486    section.  The argument provides callback-specific data.  */
 487 typedef void (*unnamed_section_callback) (const void *);
 488
 489 /* Information about a SECTION_UNNAMED section.  */
 490 struct unnamed_section GTY(()) {
 491   struct section_common common;
 492
 493   /* The callback used to switch to the section, and the data that
 494      should be passed to the callback.  */
 495   unnamed_section_callback GTY ((skip)) callback;
 496   const void *GTY ((skip)) data;
 497
 498   /* The next entry in the chain of unnamed sections.  */
 499   section *next;
 500 };
 501
 502 /* A callback that writes the assembly code for a decl in a
 503    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 504    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 505    in bytes and ROUNDED is that size rounded up to the next
 506    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 507
 508    Return true if the callback used DECL_ALIGN to set the object's
 509    alignment.  A false return value implies that we are relying
 510    on the rounded size to align the decl.  */
 511 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 512                                            unsigned HOST_WIDE_INT size,
 513                                            unsigned HOST_WIDE_INT rounded);
 514
 515 /* Information about a SECTION_NOSWITCH section.  */
 516 struct noswitch_section GTY(()) {
 517   struct section_common common;
 518
 519   /* The callback used to assemble decls in this section.  */
 520   noswitch_section_callback GTY ((skip)) callback;
 521 };
 522
 523 /* Information about a section, which may be named or unnamed.  */
 524 union section GTY ((desc ("SECTION_STYLE (&(%h))")))
 525 {
 526   struct section_common GTY ((skip)) common;
 527   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 528   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 529   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 530 };
 531
 532 /* Return the style of section SECT.  */
 533 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 534
 535 struct object_block;
 536
 537 /* Special well-known sections.  */
 538 extern GTY(()) section *text_section;
 539 extern GTY(()) section *data_section;
 540 extern GTY(()) section *readonly_data_section;
 541 extern GTY(()) section *sdata_section;
 542 extern GTY(()) section *ctors_section;
 543 extern GTY(()) section *dtors_section;
 544 extern GTY(()) section *bss_section;
 545 extern GTY(()) section *sbss_section;
 546 extern GTY(()) section *exception_section;
 547 extern GTY(()) section *eh_frame_section;
 548 extern GTY(()) section *tls_comm_section;
 549 extern GTY(()) section *comm_section;
 550 extern GTY(()) section *lcomm_section;
 551 extern GTY(()) section *bss_noswitch_section;
 552
 553 extern GTY(()) section *in_section;
 554 extern GTY(()) bool in_cold_section_p;
 555
 556 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 557                                      const void *);
 558 extern section *get_section (const char *, unsigned int, tree);
 559 extern section *get_named_section (tree, const char *, int);
 560 extern void place_block_symbol (rtx);
 561 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 562                                enum tls_model);
 563 extern section *mergeable_constant_section (enum machine_mode,
 564                                             unsigned HOST_WIDE_INT,
 565                                             unsigned int);
 566 extern section *function_section (tree);
 567 extern section *unlikely_text_section (void);
 568 extern section *current_function_section (void);
 569
 570 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
 571    not) section for PRIORITY.  */
 572 extern section *get_cdtor_priority_section (int, bool);
 573
 574 extern bool unlikely_text_section_p (section *);
 575 extern void switch_to_section (section *);
 576 extern void output_section_asm_op (const void *);
 577
 578 extern unsigned int default_section_type_flags (tree, const char *, int);
 579
 580 extern bool have_global_bss_p (void);
 581 extern void default_no_named_section (const char *, unsigned int, tree);
 582 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 583 extern enum section_category categorize_decl_for_section (tree, int);
 584 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 585 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 586
 587 extern void default_stabs_asm_out_destructor (rtx, int);
 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_stabs_asm_out_constructor (rtx, int);
 591 extern void default_named_section_asm_out_constructor (rtx, int);
 592 extern void default_ctor_section_asm_out_constructor (rtx, int);
 593
 594 extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
 595 extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
 596 extern void default_unique_section (tree, int);
 597 extern section *default_function_rodata_section (tree);
 598 extern section *default_no_function_rodata_section (tree);
 599 extern section *default_select_rtx_section (enum machine_mode, rtx,
 600                                             unsigned HOST_WIDE_INT);
 601 extern section *default_elf_select_rtx_section (enum 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 (rtx);
 607 extern bool default_binds_local_p (tree);
 608 extern bool default_binds_local_p_1 (tree, int);
 609 extern void default_globalize_label (FILE *, const char *);
 610 extern void default_globalize_decl_name (FILE *, tree);
 611 extern void default_emit_unwind_label (FILE *, tree, int, int);
 612 extern void default_emit_except_table_label (FILE *);
 613 extern void default_internal_label (FILE *, const char *, unsigned long);
 614 extern void default_file_start (void);
 615 extern void file_end_indicate_exec_stack (void);
 616 extern bool default_valid_pointer_mode (enum machine_mode);
 617
 618 extern void default_elf_asm_output_external (FILE *file, tree,
 619                                              const char *);
 620 extern int maybe_assemble_visibility (tree);
 621
 622 extern int default_address_cost (rtx);
 623
 624 /* dbxout helper functions */
 625 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
 626
 627 extern void dbxout_int (int);
 628 extern void dbxout_stabd (int, int);
 629 extern void dbxout_begin_stabn (int);
 630 extern void dbxout_begin_stabn_sline (int);
 631 extern void dbxout_begin_empty_stabs (int);
 632 extern void dbxout_begin_simple_stabs (const char *, int);
 633 extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
 634
 635 extern void dbxout_stab_value_zero (void);
 636 extern void dbxout_stab_value_label (const char *);
 637 extern void dbxout_stab_value_label_diff (const char *, const char *);
 638 extern void dbxout_stab_value_internal_label (const char *, int *);
 639 extern void dbxout_stab_value_internal_label_diff (const char *, int *,
 640                                                    const char *);
 641
 642 #endif
 643
 644 #endif /* ! GCC_OUTPUT_H */