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,
   4    1999, 2000, 2001, 2002, 2003, 2004, 2005 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 flow.c */
 149 extern int regno_clobbered_at_setjmp (int);
 150
 151 /* Functions in varasm.c.  */
 152
 153 /* Declare DECL to be a weak symbol.  */
 154 extern void declare_weak (tree);
 155 /* Merge weak status.  */
 156 extern void merge_weak (tree, tree);
 157
 158 /* Emit any pending weak declarations.  */
 159 extern void weak_finish (void);
 160
 161 /* Emit any pending emutls declarations and initializations.  */
 162 extern void emutls_finish (void);
 163
 164 /* Decode an `asm' spec for a declaration as a register name.
 165    Return the register number, or -1 if nothing specified,
 166    or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
 167    or -3 if ASMSPEC is `cc' and is not recognized,
 168    or -4 if ASMSPEC is `memory' and is not recognized.
 169    Accept an exact spelling or a decimal number.
 170    Prefixes such as % are optional.  */
 171 extern int decode_reg_name (const char *);
 172
 173 extern void assemble_alias (tree, tree);
 174
 175 extern void default_assemble_visibility (tree, int);
 176
 177 /* Output a string of literal assembler code
 178    for an `asm' keyword used between functions.  */
 179 extern void assemble_asm (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 /* Compute the alignment of variable specified by DECL.
 203    DONT_OUTPUT_DATA is from assemble_variable.  */
 204 extern void align_variable (tree decl, bool dont_output_data);
 205
 206 /* Queue for outputting something to declare an external symbol to the
 207    assembler.  (Most assemblers don't need this, so we normally output
 208    nothing.)  Do nothing if DECL is not external.  */
 209 extern void assemble_external (tree);
 210
 211 /* Assemble code to leave SIZE bytes of zeros.  */
 212 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 213
 214 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 215 extern void assemble_align (int);
 216
 217 /* Assemble a string constant with the specified C string as contents.  */
 218 extern void assemble_string (const char *, int);
 219
 220 /* Similar, for calling a library function FUN.  */
 221 extern void assemble_external_libcall (rtx);
 222
 223 /* Assemble a label named NAME.  */
 224 extern void assemble_label (const char *);
 225
 226 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 227    starts with a *, the rest of NAME is output verbatim.  Otherwise
 228    NAME is transformed in a target-specific way (usually by the
 229    addition of an underscore).  */
 230 extern void assemble_name_raw (FILE *, const char *);
 231
 232 /* Like assemble_name_raw, but should be used when NAME might refer to
 233    an entity that is also represented as a tree (like a function or
 234    variable).  If NAME does refer to such an entity, that entity will
 235    be marked as referenced.  */
 236 extern void assemble_name (FILE *, const char *);
 237
 238 /* Return the assembler directive for creating a given kind of integer
 239    object.  SIZE is the number of bytes in the object and ALIGNED_P
 240    indicates whether it is known to be aligned.  Return NULL if the
 241    assembly dialect has no such directive.
 242
 243    The returned string should be printed at the start of a new line and
 244    be followed immediately by the object's initial value.  */
 245 extern const char *integer_asm_op (int, int);
 246
 247 /* Use directive OP to assemble an integer object X.  Print OP at the
 248    start of the line, followed immediately by the value of X.  */
 249 extern void assemble_integer_with_op (const char *, rtx);
 250
 251 /* The default implementation of the asm_out.integer target hook.  */
 252 extern bool default_assemble_integer (rtx, unsigned int, int);
 253
 254 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 255    the alignment of the integer in bits.  Return 1 if we were able to output
 256    the constant, otherwise 0.  If FORCE is nonzero the constant must
 257    be outputable. */
 258 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 259
 260 /* An interface to assemble_integer for the common case in which a value is
 261    fully aligned and must be printed.  VALUE is the value of the integer
 262    object and SIZE is the number of bytes it contains.  */
 263 #define assemble_aligned_integer(SIZE, VALUE) \
 264   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 265
 266 #ifdef REAL_VALUE_TYPE_SIZE
 267 /* Assemble the floating-point constant D into an object of size MODE.  */
 268 extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
 269 #endif
 270
 271 /* Write the address of the entity given by SYMBOL to SEC.  */
 272 extern void assemble_addr_to_section (rtx, section *);
 273
 274 /* Return the size of the constant pool.  */
 275 extern int get_pool_size (void);
 276
 277 #ifdef HAVE_peephole
 278 extern rtx peephole (rtx);
 279 #endif
 280
 281 extern void output_shared_constant_pool (void);
 282
 283 extern void output_object_blocks (void);
 284
 285 /* Whether a constructor CTOR is a valid static constant initializer if all
 286    its elements are.  This used to be internal to initializer_constant_valid_p
 287    and has been exposed to let other functions like categorize_ctor_elements
 288    evaluate the property while walking a constructor for other purposes.  */
 289
 290 extern bool constructor_static_from_elts_p (tree);
 291
 292 /* Return nonzero if VALUE is a valid constant-valued expression
 293    for use in initializing a static variable; one that can be an
 294    element of a "constant" initializer.
 295
 296    Return null_pointer_node if the value is absolute;
 297    if it is relocatable, return the variable that determines the relocation.
 298    We assume that VALUE has been folded as much as possible;
 299    therefore, we do not need to check for such things as
 300    arithmetic-combinations of integers.  */
 301 extern tree initializer_constant_valid_p (tree, tree);
 302
 303 /* Output assembler code for constant EXP to FILE, with no label.
 304    This includes the pseudo-op such as ".int" or ".byte", and a newline.
 305    Assumes output_addressed_constants has been done on EXP already.
 306
 307    Generate exactly SIZE bytes of assembler data, padding at the end
 308    with zeros if necessary.  SIZE must always be specified.
 309
 310    ALIGN is the alignment in bits that may be assumed for the data.  */
 311 extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
 312
 313 /* When outputting delayed branch sequences, this rtx holds the
 314    sequence being output.  It is null when no delayed branch
 315    sequence is being output, so it can be used as a test in the
 316    insn output code.
 317
 318    This variable is defined  in final.c.  */
 319 extern rtx final_sequence;
 320
 321 /* The line number of the beginning of the current function.  Various
 322    md code needs this so that it can output relative linenumbers.  */
 323
 324 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 325 extern int sdb_begin_function_line;
 326 #endif
 327
 328 /* File in which assembler code is being written.  */
 329
 330 #ifdef BUFSIZ
 331 extern FILE *asm_out_file;
 332 #endif
 333
 334 /* The first global object in the file.  */
 335 extern const char *first_global_object_name;
 336
 337 /* The first weak object in the file.  */
 338 extern const char *weak_global_object_name;
 339
 340 /* Nonzero if function being compiled doesn't contain any calls
 341    (ignoring the prologue and epilogue).  This is set prior to
 342    local register allocation and is valid for the remaining
 343    compiler passes.  */
 344
 345 extern int current_function_is_leaf;
 346
 347 /* Nonzero if function being compiled doesn't modify the stack pointer
 348    (ignoring the prologue and epilogue).  This is only valid after
 349    life_analysis has run.  */
 350
 351 extern int current_function_sp_is_unchanging;
 352
 353 /* Nonzero if the function being compiled is a leaf function which only
 354    uses leaf registers.  This is valid after reload (specifically after
 355    sched2) and is useful only if the port defines LEAF_REGISTERS.  */
 356
 357 extern int current_function_uses_only_leaf_regs;
 358
 359 /* Default file in which to dump debug output.  */
 360
 361 #ifdef BUFSIZ
 362 extern FILE *dump_file;
 363 #endif
 364
 365 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 366 extern rtx current_insn_predicate;
 367
 368 /* Last insn processed by final_scan_insn.  */
 369 extern rtx current_output_insn;
 370
 371 /* Nonzero while outputting an `asm' with operands.
 372    This means that inconsistencies are the user's fault, so don't die.
 373    The precise value is the insn being output, to pass to error_for_asm.  */
 374 extern rtx this_is_asm_operands;
 375
 376 /* Carry information from ASM_DECLARE_OBJECT_NAME
 377    to ASM_FINISH_DECLARE_OBJECT.  */
 378 extern int size_directive_output;
 379 extern tree last_assemble_variable_decl;
 380
 381 extern bool first_function_block_is_cold;
 382
 383 /* Decide whether DECL needs to be in a writable section.
 384    RELOC is the same as for SELECT_SECTION.  */
 385 extern bool decl_readonly_section (tree, int);
 386 extern bool decl_readonly_section_1 (tree, int, int);
 387
 388 /* This can be used to compute RELOC for the function above, when
 389    given a constant expression.  */
 390 extern int compute_reloc_for_constant (tree);
 391
 392 /* User label prefix in effect for this compilation.  */
 393 extern const char *user_label_prefix;
 394
 395 /* Default target function prologue and epilogue assembler output.  */
 396 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
 397
 398 /* Default target hook that outputs nothing to a stream.  */
 399 extern void no_asm_to_stream (FILE *);
 400
 401 /* Flags controlling properties of a section.  */
 402 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 403 #define SECTION_CODE     0x00100        /* contains code */
 404 #define SECTION_WRITE    0x00200        /* data is writable */
 405 #define SECTION_DEBUG    0x00400        /* contains debug data */
 406 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 407 #define SECTION_SMALL    0x01000        /* contains "small data" */
 408 #define SECTION_BSS      0x02000        /* contains zeros only */
 409 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 410 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 411 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 412                                            embedded zeros */
 413 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 414 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 415 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 416 #define SECTION_DECLARED 0x100000       /* section has been used */
 417 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 418 #define SECTION_COMMON   0x800000       /* contains common data */
 419 #define SECTION_MACH_DEP 0x1000000      /* subsequent bits reserved for target */
 420
 421 /* This SECTION_STYLE is used for unnamed sections that we can switch
 422    to using a special assembler directive.  */
 423 #define SECTION_UNNAMED  0x000000
 424
 425 /* This SECTION_STYLE is used for named sections that we can switch
 426    to using a general section directive.  */
 427 #define SECTION_NAMED    0x200000
 428
 429 /* This SECTION_STYLE is used for sections that we cannot switch to at
 430    all.  The choice of section is implied by the directive that we use
 431    to declare the object.  */
 432 #define SECTION_NOSWITCH 0x400000
 433
 434 /* A helper function for default_elf_select_section and
 435    default_elf_unique_section.  Categorizes the DECL.  */
 436
 437 enum section_category
 438 {
 439   SECCAT_TEXT,
 440
 441   SECCAT_RODATA,
 442   SECCAT_RODATA_MERGE_STR,
 443   SECCAT_RODATA_MERGE_STR_INIT,
 444   SECCAT_RODATA_MERGE_CONST,
 445   SECCAT_SRODATA,
 446
 447   SECCAT_DATA,
 448
 449   /* To optimize loading of shared programs, define following subsections
 450      of data section:
 451         _REL    Contains data that has relocations, so they get grouped
 452                 together and dynamic linker will visit fewer pages in memory.
 453         _RO     Contains data that is otherwise read-only.  This is useful
 454                 with prelinking as most relocations won't be dynamically
 455                 linked and thus stay read only.
 456         _LOCAL  Marks data containing relocations only to local objects.
 457                 These relocations will get fully resolved by prelinking.  */
 458   SECCAT_DATA_REL,
 459   SECCAT_DATA_REL_LOCAL,
 460   SECCAT_DATA_REL_RO,
 461   SECCAT_DATA_REL_RO_LOCAL,
 462
 463   SECCAT_SDATA,
 464   SECCAT_TDATA,
 465
 466   SECCAT_BSS,
 467   SECCAT_SBSS,
 468   SECCAT_TBSS
 469 };
 470
 471 /* Information that is provided by all instances of the section type.  */
 472 struct section_common GTY(()) {
 473   /* The set of SECTION_* flags that apply to this section.  */
 474   unsigned int flags;
 475 };
 476
 477 /* Information about a SECTION_NAMED section.  */
 478 struct named_section GTY(()) {
 479   struct section_common common;
 480
 481   /* The name of the section.  */
 482   const char *name;
 483
 484   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 485      section is associated.  */
 486   tree decl;
 487 };
 488
 489 /* A callback that writes the assembly code for switching to an unnamed
 490    section.  The argument provides callback-specific data.  */
 491 typedef void (*unnamed_section_callback) (const void *);
 492
 493 /* Information about a SECTION_UNNAMED section.  */
 494 struct unnamed_section GTY(()) {
 495   struct section_common common;
 496
 497   /* The callback used to switch to the section, and the data that
 498      should be passed to the callback.  */
 499   unnamed_section_callback GTY ((skip)) callback;
 500   const void *GTY ((skip)) data;
 501
 502   /* The next entry in the chain of unnamed sections.  */
 503   section *next;
 504 };
 505
 506 /* A callback that writes the assembly code for a decl in a
 507    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 508    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 509    in bytes and ROUNDED is that size rounded up to the next
 510    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 511
 512    Return true if the callback used DECL_ALIGN to set the object's
 513    alignment.  A false return value implies that we are relying
 514    on the rounded size to align the decl.  */
 515 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 516                                            unsigned HOST_WIDE_INT size,
 517                                            unsigned HOST_WIDE_INT rounded);
 518
 519 /* Information about a SECTION_NOSWITCH section.  */
 520 struct noswitch_section GTY(()) {
 521   struct section_common common;
 522
 523   /* The callback used to assemble decls in this section.  */
 524   noswitch_section_callback GTY ((skip)) callback;
 525 };
 526
 527 /* Information about a section, which may be named or unnamed.  */
 528 union section GTY ((desc ("SECTION_STYLE (&(%h))")))
 529 {
 530   struct section_common GTY ((skip)) common;
 531   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 532   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 533   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 534 };
 535
 536 /* Return the style of section SECT.  */
 537 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 538
 539 struct object_block;
 540
 541 /* Special well-known sections.  */
 542 extern GTY(()) section *text_section;
 543 extern GTY(()) section *data_section;
 544 extern GTY(()) section *readonly_data_section;
 545 extern GTY(()) section *sdata_section;
 546 extern GTY(()) section *ctors_section;
 547 extern GTY(()) section *dtors_section;
 548 extern GTY(()) section *bss_section;
 549 extern GTY(()) section *sbss_section;
 550 extern GTY(()) section *exception_section;
 551 extern GTY(()) section *eh_frame_section;
 552 extern GTY(()) section *tls_comm_section;
 553 extern GTY(()) section *comm_section;
 554 extern GTY(()) section *lcomm_section;
 555 extern GTY(()) section *bss_noswitch_section;
 556
 557 extern GTY(()) section *in_section;
 558 extern GTY(()) bool in_cold_section_p;
 559
 560 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 561                                      const void *);
 562 extern section *get_section (const char *, unsigned int, tree);
 563 extern section *get_named_section (tree, const char *, int);
 564 extern void place_block_symbol (rtx);
 565 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 566                                enum tls_model);
 567 extern section *mergeable_constant_section (enum machine_mode,
 568                                             unsigned HOST_WIDE_INT,
 569                                             unsigned int);
 570 extern section *function_section (tree);
 571 extern section *unlikely_text_section (void);
 572 extern section *current_function_section (void);
 573
 574 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
 575    not) section for PRIORITY.  */
 576 extern section *get_cdtor_priority_section (int, bool);
 577
 578 extern bool unlikely_text_section_p (section *);
 579 extern void switch_to_section (section *);
 580 extern void output_section_asm_op (const void *);
 581
 582 extern unsigned int default_section_type_flags (tree, const char *, int);
 583 extern unsigned int default_section_type_flags_1 (tree, const char *, int, int);
 584
 585 extern bool have_global_bss_p (void);
 586 extern void default_no_named_section (const char *, unsigned int, tree);
 587 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 588 extern enum section_category categorize_decl_for_section (tree, int, int);
 589 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 590 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 591
 592 extern void default_stabs_asm_out_destructor (rtx, int);
 593 extern void default_named_section_asm_out_destructor (rtx, int);
 594 extern void default_dtor_section_asm_out_destructor (rtx, int);
 595 extern void default_stabs_asm_out_constructor (rtx, int);
 596 extern void default_named_section_asm_out_constructor (rtx, int);
 597 extern void default_ctor_section_asm_out_constructor (rtx, int);
 598
 599 extern section *default_select_section (tree, int,
 600                                                unsigned HOST_WIDE_INT);
 601 extern section *default_elf_select_section (tree, int,
 602                                                    unsigned HOST_WIDE_INT);
 603 extern section *default_elf_select_section_1 (tree, int,
 604                                                      unsigned HOST_WIDE_INT,
 605                                                      int);
 606 extern void default_unique_section (tree, int);
 607 extern void default_unique_section_1 (tree, int, int);
 608 extern section *default_function_rodata_section (tree);
 609 extern section *default_no_function_rodata_section (tree);
 610 extern section *default_select_rtx_section (enum machine_mode, rtx,
 611                                             unsigned HOST_WIDE_INT);
 612 extern section *default_elf_select_rtx_section (enum machine_mode, rtx,
 613                                                 unsigned HOST_WIDE_INT);
 614 extern void default_encode_section_info (tree, rtx, int);
 615 extern const char *default_strip_name_encoding (const char *);
 616 extern void default_asm_output_anchor (rtx);
 617 extern bool default_use_anchors_for_symbol_p (rtx);
 618 extern bool default_binds_local_p (tree);
 619 extern bool default_binds_local_p_1 (tree, int);
 620 extern void default_globalize_label (FILE *, const char *);
 621 extern void default_globalize_decl_name (FILE *, tree);
 622 extern void default_emit_unwind_label (FILE *, tree, int, int);
 623 extern void default_emit_except_table_label (FILE *);
 624 extern void default_internal_label (FILE *, const char *, unsigned long);
 625 extern void default_file_start (void);
 626 extern void file_end_indicate_exec_stack (void);
 627 extern bool default_valid_pointer_mode (enum machine_mode);
 628
 629 extern void default_elf_asm_output_external (FILE *file, tree,
 630                                              const char *);
 631 extern int maybe_assemble_visibility (tree);
 632
 633 extern int default_address_cost (rtx);
 634
 635 /* dbxout helper functions */
 636 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
 637
 638 extern void dbxout_int (int);
 639 extern void dbxout_stabd (int, int);
 640 extern void dbxout_begin_stabn (int);
 641 extern void dbxout_begin_stabn_sline (int);
 642 extern void dbxout_begin_empty_stabs (int);
 643 extern void dbxout_begin_simple_stabs (const char *, int);
 644 extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
 645
 646 extern void dbxout_stab_value_zero (void);
 647 extern void dbxout_stab_value_label (const char *);
 648 extern void dbxout_stab_value_label_diff (const char *, const char *);
 649 extern void dbxout_stab_value_internal_label (const char *, int *);
 650 extern void dbxout_stab_value_internal_label_diff (const char *, int *,
 651                                                    const char *);
 652
 653 #endif
 654
 655 #endif /* ! GCC_OUTPUT_H */