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 /* Make the rtl for variable VAR be volatile.
 174    Use this only for static variables.  */
 175 extern void make_var_volatile (tree);
 176
 177 extern void assemble_alias (tree, tree);
 178
 179 extern void default_assemble_visibility (tree, int);
 180
 181 /* Output a string of literal assembler code
 182    for an `asm' keyword used between functions.  */
 183 extern void assemble_asm (tree);
 184
 185 /* Output assembler code for the constant pool of a function and associated
 186    with defining the name of the function.  DECL describes the function.
 187    NAME is the function's name.  For the constant pool, we use the current
 188    constant pool data.  */
 189 extern void assemble_start_function (tree, const char *);
 190
 191 /* Output assembler code associated with defining the size of the
 192    function.  DECL describes the function.  NAME is the function's name.  */
 193 extern void assemble_end_function (tree, const char *);
 194
 195 /* Assemble everything that is needed for a variable or function declaration.
 196    Not used for automatic variables, and not used for function definitions.
 197    Should not be called for variables of incomplete structure type.
 198
 199    TOP_LEVEL is nonzero if this variable has file scope.
 200    AT_END is nonzero if this is the special handling, at end of compilation,
 201    to define things that have had only tentative definitions.
 202    DONT_OUTPUT_DATA if nonzero means don't actually output the
 203    initial value (that will be done by the caller).  */
 204 extern void assemble_variable (tree, int, int, int);
 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 (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 (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 /* Like assemble_name_raw, but should be used when NAME might refer to
 237    an entity that is also represented as a tree (like a function or
 238    variable).  If NAME does refer to such an entity, that entity will
 239    be marked as referenced.  */
 240 extern void assemble_name (FILE *, const char *);
 241
 242 /* Return the assembler directive for creating a given kind of integer
 243    object.  SIZE is the number of bytes in the object and ALIGNED_P
 244    indicates whether it is known to be aligned.  Return NULL if the
 245    assembly dialect has no such directive.
 246
 247    The returned string should be printed at the start of a new line and
 248    be followed immediately by the object's initial value.  */
 249 extern const char *integer_asm_op (int, int);
 250
 251 /* Use directive OP to assemble an integer object X.  Print OP at the
 252    start of the line, followed immediately by the value of X.  */
 253 extern void assemble_integer_with_op (const char *, rtx);
 254
 255 /* The default implementation of the asm_out.integer target hook.  */
 256 extern bool default_assemble_integer (rtx, unsigned int, int);
 257
 258 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 259    the alignment of the integer in bits.  Return 1 if we were able to output
 260    the constant, otherwise 0.  If FORCE is nonzero the constant must
 261    be outputable. */
 262 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 263
 264 /* An interface to assemble_integer for the common case in which a value is
 265    fully aligned and must be printed.  VALUE is the value of the integer
 266    object and SIZE is the number of bytes it contains.  */
 267 #define assemble_aligned_integer(SIZE, VALUE) \
 268   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 269
 270 #ifdef REAL_VALUE_TYPE_SIZE
 271 /* Assemble the floating-point constant D into an object of size MODE.  */
 272 extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
 273 #endif
 274
 275 /* Return the size of the constant pool.  */
 276 extern int get_pool_size (void);
 277
 278 #ifdef HAVE_peephole
 279 extern rtx peephole (rtx);
 280 #endif
 281
 282 extern void output_shared_constant_pool (void);
 283
 284 extern void output_object_blocks (void);
 285
 286 /* Whether a constructor CTOR is a valid static constant initializer if all
 287    its elements are.  This used to be internal to initializer_constant_valid_p
 288    and has been exposed to let other functions like categorize_ctor_elements
 289    evaluate the property while walking a constructor for other purposes.  */
 290
 291 extern bool constructor_static_from_elts_p (tree);
 292
 293 /* Return nonzero if VALUE is a valid constant-valued expression
 294    for use in initializing a static variable; one that can be an
 295    element of a "constant" initializer.
 296
 297    Return null_pointer_node if the value is absolute;
 298    if it is relocatable, return the variable that determines the relocation.
 299    We assume that VALUE has been folded as much as possible;
 300    therefore, we do not need to check for such things as
 301    arithmetic-combinations of integers.  */
 302 extern tree initializer_constant_valid_p (tree, tree);
 303
 304 /* Output assembler code for constant EXP to FILE, with no label.
 305    This includes the pseudo-op such as ".int" or ".byte", and a newline.
 306    Assumes output_addressed_constants has been done on EXP already.
 307
 308    Generate exactly SIZE bytes of assembler data, padding at the end
 309    with zeros if necessary.  SIZE must always be specified.
 310
 311    ALIGN is the alignment in bits that may be assumed for the data.  */
 312 extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
 313
 314 /* When outputting delayed branch sequences, this rtx holds the
 315    sequence being output.  It is null when no delayed branch
 316    sequence is being output, so it can be used as a test in the
 317    insn output code.
 318
 319    This variable is defined  in final.c.  */
 320 extern rtx final_sequence;
 321
 322 /* The line number of the beginning of the current function.  Various
 323    md code needs this so that it can output relative linenumbers.  */
 324
 325 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 326 extern int sdb_begin_function_line;
 327 #endif
 328
 329 /* File in which assembler code is being written.  */
 330
 331 #ifdef BUFSIZ
 332 extern FILE *asm_out_file;
 333 #endif
 334
 335 /* The first global object in the file.  */
 336 extern const char *first_global_object_name;
 337
 338 /* The first weak object in the file.  */
 339 extern const char *weak_global_object_name;
 340
 341 /* Nonzero if function being compiled doesn't contain any calls
 342    (ignoring the prologue and epilogue).  This is set prior to
 343    local register allocation and is valid for the remaining
 344    compiler passes.  */
 345
 346 extern int current_function_is_leaf;
 347
 348 /* Nonzero if function being compiled doesn't modify the stack pointer
 349    (ignoring the prologue and epilogue).  This is only valid after
 350    life_analysis has run.  */
 351
 352 extern int current_function_sp_is_unchanging;
 353
 354 /* Nonzero if the function being compiled is a leaf function which only
 355    uses leaf registers.  This is valid after reload (specifically after
 356    sched2) and is useful only if the port defines LEAF_REGISTERS.  */
 357
 358 extern int current_function_uses_only_leaf_regs;
 359
 360 /* Default file in which to dump debug output.  */
 361
 362 #ifdef BUFSIZ
 363 extern FILE *dump_file;
 364 #endif
 365
 366 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 367 extern rtx current_insn_predicate;
 368
 369 /* Last insn processed by final_scan_insn.  */
 370 extern rtx current_output_insn;
 371
 372 /* Nonzero while outputting an `asm' with operands.
 373    This means that inconsistencies are the user's fault, so don't die.
 374    The precise value is the insn being output, to pass to error_for_asm.  */
 375 extern rtx this_is_asm_operands;
 376
 377 /* Carry information from ASM_DECLARE_OBJECT_NAME
 378    to ASM_FINISH_DECLARE_OBJECT.  */
 379 extern int size_directive_output;
 380 extern tree last_assemble_variable_decl;
 381
 382 extern bool first_function_block_is_cold;
 383
 384 /* Decide whether DECL needs to be in a writable section.
 385    RELOC is the same as for SELECT_SECTION.  */
 386 extern bool decl_readonly_section (tree, int);
 387 extern bool decl_readonly_section_1 (tree, int, int);
 388
 389 /* This can be used to compute RELOC for the function above, when
 390    given a constant expression.  */
 391 extern int compute_reloc_for_constant (tree);
 392
 393 /* User label prefix in effect for this compilation.  */
 394 extern const char *user_label_prefix;
 395
 396 /* Default target function prologue and epilogue assembler output.  */
 397 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
 398
 399 /* Default target hook that outputs nothing to a stream.  */
 400 extern void no_asm_to_stream (FILE *);
 401
 402 /* Flags controlling properties of a section.  */
 403 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 404 #define SECTION_CODE     0x00100        /* contains code */
 405 #define SECTION_WRITE    0x00200        /* data is writable */
 406 #define SECTION_DEBUG    0x00400        /* contains debug data */
 407 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 408 #define SECTION_SMALL    0x01000        /* contains "small data" */
 409 #define SECTION_BSS      0x02000        /* contains zeros only */
 410 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 411 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 412 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 413                                            embedded zeros */
 414 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 415 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 416 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 417 #define SECTION_DECLARED 0x100000       /* section has been used */
 418 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 419 #define SECTION_COMMON   0x800000       /* contains common data */
 420 #define SECTION_MACH_DEP 0x1000000      /* subsequent bits reserved for target */
 421
 422 /* This SECTION_STYLE is used for unnamed sections that we can switch
 423    to using a special assembler directive.  */
 424 #define SECTION_UNNAMED  0x000000
 425
 426 /* This SECTION_STYLE is used for named sections that we can switch
 427    to using a general section directive.  */
 428 #define SECTION_NAMED    0x200000
 429
 430 /* This SECTION_STYLE is used for sections that we cannot switch to at
 431    all.  The choice of section is implied by the directive that we use
 432    to declare the object.  */
 433 #define SECTION_NOSWITCH 0x400000
 434
 435 /* A helper function for default_elf_select_section and
 436    default_elf_unique_section.  Categorizes the DECL.  */
 437
 438 enum section_category
 439 {
 440   SECCAT_TEXT,
 441
 442   SECCAT_RODATA,
 443   SECCAT_RODATA_MERGE_STR,
 444   SECCAT_RODATA_MERGE_STR_INIT,
 445   SECCAT_RODATA_MERGE_CONST,
 446   SECCAT_SRODATA,
 447
 448   SECCAT_DATA,
 449
 450   /* To optimize loading of shared programs, define following subsections
 451      of data section:
 452         _REL    Contains data that has relocations, so they get grouped
 453                 together and dynamic linker will visit fewer pages in memory.
 454         _RO     Contains data that is otherwise read-only.  This is useful
 455                 with prelinking as most relocations won't be dynamically
 456                 linked and thus stay read only.
 457         _LOCAL  Marks data containing relocations only to local objects.
 458                 These relocations will get fully resolved by prelinking.  */
 459   SECCAT_DATA_REL,
 460   SECCAT_DATA_REL_LOCAL,
 461   SECCAT_DATA_REL_RO,
 462   SECCAT_DATA_REL_RO_LOCAL,
 463
 464   SECCAT_SDATA,
 465   SECCAT_TDATA,
 466
 467   SECCAT_BSS,
 468   SECCAT_SBSS,
 469   SECCAT_TBSS
 470 };
 471
 472 /* Information that is provided by all instances of the section type.  */
 473 struct section_common GTY(()) {
 474   /* The set of SECTION_* flags that apply to this section.  */
 475   unsigned int flags;
 476 };
 477
 478 /* Information about a SECTION_NAMED section.  */
 479 struct named_section GTY(()) {
 480   struct section_common common;
 481
 482   /* The name of the section.  */
 483   const char *name;
 484
 485   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 486      section is associated.  */
 487   tree decl;
 488 };
 489
 490 /* A callback that writes the assembly code for switching to an unnamed
 491    section.  The argument provides callback-specific data.  */
 492 typedef void (*unnamed_section_callback) (const void *);
 493
 494 /* Information about a SECTION_UNNAMED section.  */
 495 struct unnamed_section GTY(()) {
 496   struct section_common common;
 497
 498   /* The callback used to switch to the section, and the data that
 499      should be passed to the callback.  */
 500   unnamed_section_callback GTY ((skip)) callback;
 501   const void *GTY ((skip)) data;
 502
 503   /* The next entry in the chain of unnamed sections.  */
 504   section *next;
 505 };
 506
 507 /* A callback that writes the assembly code for a decl in a
 508    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 509    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 510    in bytes and ROUNDED is that size rounded up to the next
 511    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 512
 513    Return true if the callback used DECL_ALIGN to set the object's
 514    alignment.  A false return value implies that we are relying
 515    on the rounded size to align the decl.  */
 516 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 517                                            unsigned HOST_WIDE_INT size,
 518                                            unsigned HOST_WIDE_INT rounded);
 519
 520 /* Information about a SECTION_NOSWITCH section.  */
 521 struct noswitch_section GTY(()) {
 522   struct section_common common;
 523
 524   /* The callback used to assemble decls in this section.  */
 525   noswitch_section_callback GTY ((skip)) callback;
 526 };
 527
 528 /* Information about a section, which may be named or unnamed.  */
 529 union section GTY ((desc ("SECTION_STYLE (&(%h))")))
 530 {
 531   struct section_common GTY ((skip)) common;
 532   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 533   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 534   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 535 };
 536
 537 /* Return the style of section SECT.  */
 538 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 539
 540 struct object_block;
 541
 542 /* Special well-known sections.  */
 543 extern GTY(()) section *text_section;
 544 extern GTY(()) section *data_section;
 545 extern GTY(()) section *readonly_data_section;
 546 extern GTY(()) section *sdata_section;
 547 extern GTY(()) section *ctors_section;
 548 extern GTY(()) section *dtors_section;
 549 extern GTY(()) section *bss_section;
 550 extern GTY(()) section *sbss_section;
 551 extern GTY(()) section *exception_section;
 552 extern GTY(()) section *eh_frame_section;
 553 extern GTY(()) section *tls_comm_section;
 554 extern GTY(()) section *comm_section;
 555 extern GTY(()) section *lcomm_section;
 556 extern GTY(()) section *bss_noswitch_section;
 557
 558 extern GTY(()) section *in_section;
 559 extern GTY(()) bool in_cold_section_p;
 560
 561 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 562                                      const void *);
 563 extern section *get_section (const char *, unsigned int, tree);
 564 extern section *get_named_section (tree, const char *, int);
 565 extern void place_block_symbol (rtx);
 566 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 567                                enum tls_model);
 568 extern section *mergeable_constant_section (enum machine_mode,
 569                                             unsigned HOST_WIDE_INT,
 570                                             unsigned int);
 571 extern section *function_section (tree);
 572 extern section *unlikely_text_section (void);
 573 extern section *current_function_section (void);
 574
 575 extern bool unlikely_text_section_p (section *);
 576 extern void switch_to_section (section *);
 577 extern void output_section_asm_op (const void *);
 578
 579 extern unsigned int default_section_type_flags (tree, const char *, int);
 580 extern unsigned int default_section_type_flags_1 (tree, const char *, int, int);
 581
 582 extern bool have_global_bss_p (void);
 583 extern void default_no_named_section (const char *, unsigned int, tree);
 584 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 585 extern enum section_category categorize_decl_for_section (tree, int, int);
 586 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 587 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 588
 589 extern void default_stabs_asm_out_destructor (rtx, int);
 590 extern void default_named_section_asm_out_destructor (rtx, int);
 591 extern void default_dtor_section_asm_out_destructor (rtx, int);
 592 extern void default_stabs_asm_out_constructor (rtx, int);
 593 extern void default_named_section_asm_out_constructor (rtx, int);
 594 extern void default_ctor_section_asm_out_constructor (rtx, int);
 595
 596 extern section *default_select_section (tree, int,
 597                                                unsigned HOST_WIDE_INT);
 598 extern section *default_elf_select_section (tree, int,
 599                                                    unsigned HOST_WIDE_INT);
 600 extern section *default_elf_select_section_1 (tree, int,
 601                                                      unsigned HOST_WIDE_INT,
 602                                                      int);
 603 extern void default_unique_section (tree, int);
 604 extern void default_unique_section_1 (tree, int, int);
 605 extern section *default_function_rodata_section (tree);
 606 extern section *default_no_function_rodata_section (tree);
 607 extern section *default_select_rtx_section (enum machine_mode, rtx,
 608                                             unsigned HOST_WIDE_INT);
 609 extern section *default_elf_select_rtx_section (enum machine_mode, rtx,
 610                                                 unsigned HOST_WIDE_INT);
 611 extern void default_encode_section_info (tree, rtx, int);
 612 extern const char *default_strip_name_encoding (const char *);
 613 extern void default_asm_output_anchor (rtx);
 614 extern bool default_use_anchors_for_symbol_p (rtx);
 615 extern bool default_binds_local_p (tree);
 616 extern bool default_binds_local_p_1 (tree, int);
 617 extern void default_globalize_label (FILE *, const char *);
 618 extern void default_globalize_decl_name (FILE *, tree);
 619 extern void default_emit_unwind_label (FILE *, tree, int, int);
 620 extern void default_emit_except_table_label (FILE *);
 621 extern void default_internal_label (FILE *, const char *, unsigned long);
 622 extern void default_file_start (void);
 623 extern void file_end_indicate_exec_stack (void);
 624 extern bool default_valid_pointer_mode (enum machine_mode);
 625
 626 extern void default_elf_asm_output_external (FILE *file, tree,
 627                                              const char *);
 628 extern int maybe_assemble_visibility (tree);
 629
 630 extern int default_address_cost (rtx);
 631
 632 /* dbxout helper functions */
 633 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
 634
 635 extern void dbxout_int (int);
 636 extern void dbxout_stabd (int, int);
 637 extern void dbxout_begin_stabn (int);
 638 extern void dbxout_begin_stabn_sline (int);
 639 extern void dbxout_begin_empty_stabs (int);
 640 extern void dbxout_begin_simple_stabs (const char *, int);
 641 extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
 642
 643 extern void dbxout_stab_value_zero (void);
 644 extern void dbxout_stab_value_label (const char *);
 645 extern void dbxout_stab_value_label_diff (const char *, const char *);
 646 extern void dbxout_stab_value_internal_label (const char *, int *);
 647 extern void dbxout_stab_value_internal_label_diff (const char *, int *,
 648                                                    const char *);
 649
 650 #endif
 651
 652 #endif /* ! GCC_OUTPUT_H */