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 /* Write the address of the entity given by SYMBOL to SEC.  */
 276 extern void assemble_addr_to_section (rtx, section *);
 277
 278 /* Return the size of the constant pool.  */
 279 extern int get_pool_size (void);
 280
 281 #ifdef HAVE_peephole
 282 extern rtx peephole (rtx);
 283 #endif
 284
 285 extern void output_shared_constant_pool (void);
 286
 287 extern void output_object_blocks (void);
 288
 289 /* Whether a constructor CTOR is a valid static constant initializer if all
 290    its elements are.  This used to be internal to initializer_constant_valid_p
 291    and has been exposed to let other functions like categorize_ctor_elements
 292    evaluate the property while walking a constructor for other purposes.  */
 293
 294 extern bool constructor_static_from_elts_p (tree);
 295
 296 /* Return nonzero if VALUE is a valid constant-valued expression
 297    for use in initializing a static variable; one that can be an
 298    element of a "constant" initializer.
 299
 300    Return null_pointer_node if the value is absolute;
 301    if it is relocatable, return the variable that determines the relocation.
 302    We assume that VALUE has been folded as much as possible;
 303    therefore, we do not need to check for such things as
 304    arithmetic-combinations of integers.  */
 305 extern tree initializer_constant_valid_p (tree, tree);
 306
 307 /* Output assembler code for constant EXP to FILE, with no label.
 308    This includes the pseudo-op such as ".int" or ".byte", and a newline.
 309    Assumes output_addressed_constants has been done on EXP already.
 310
 311    Generate exactly SIZE bytes of assembler data, padding at the end
 312    with zeros if necessary.  SIZE must always be specified.
 313
 314    ALIGN is the alignment in bits that may be assumed for the data.  */
 315 extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
 316
 317 /* When outputting delayed branch sequences, this rtx holds the
 318    sequence being output.  It is null when no delayed branch
 319    sequence is being output, so it can be used as a test in the
 320    insn output code.
 321
 322    This variable is defined  in final.c.  */
 323 extern rtx final_sequence;
 324
 325 /* The line number of the beginning of the current function.  Various
 326    md code needs this so that it can output relative linenumbers.  */
 327
 328 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 329 extern int sdb_begin_function_line;
 330 #endif
 331
 332 /* File in which assembler code is being written.  */
 333
 334 #ifdef BUFSIZ
 335 extern FILE *asm_out_file;
 336 #endif
 337
 338 /* The first global object in the file.  */
 339 extern const char *first_global_object_name;
 340
 341 /* The first weak object in the file.  */
 342 extern const char *weak_global_object_name;
 343
 344 /* Nonzero if function being compiled doesn't contain any calls
 345    (ignoring the prologue and epilogue).  This is set prior to
 346    local register allocation and is valid for the remaining
 347    compiler passes.  */
 348
 349 extern int current_function_is_leaf;
 350
 351 /* Nonzero if function being compiled doesn't modify the stack pointer
 352    (ignoring the prologue and epilogue).  This is only valid after
 353    life_analysis has run.  */
 354
 355 extern int current_function_sp_is_unchanging;
 356
 357 /* Nonzero if the function being compiled is a leaf function which only
 358    uses leaf registers.  This is valid after reload (specifically after
 359    sched2) and is useful only if the port defines LEAF_REGISTERS.  */
 360
 361 extern int current_function_uses_only_leaf_regs;
 362
 363 /* Default file in which to dump debug output.  */
 364
 365 #ifdef BUFSIZ
 366 extern FILE *dump_file;
 367 #endif
 368
 369 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 370 extern rtx current_insn_predicate;
 371
 372 /* Last insn processed by final_scan_insn.  */
 373 extern rtx current_output_insn;
 374
 375 /* Nonzero while outputting an `asm' with operands.
 376    This means that inconsistencies are the user's fault, so don't die.
 377    The precise value is the insn being output, to pass to error_for_asm.  */
 378 extern rtx this_is_asm_operands;
 379
 380 /* Carry information from ASM_DECLARE_OBJECT_NAME
 381    to ASM_FINISH_DECLARE_OBJECT.  */
 382 extern int size_directive_output;
 383 extern tree last_assemble_variable_decl;
 384
 385 extern bool first_function_block_is_cold;
 386
 387 /* Decide whether DECL needs to be in a writable section.
 388    RELOC is the same as for SELECT_SECTION.  */
 389 extern bool decl_readonly_section (tree, int);
 390 extern bool decl_readonly_section_1 (tree, int, int);
 391
 392 /* This can be used to compute RELOC for the function above, when
 393    given a constant expression.  */
 394 extern int compute_reloc_for_constant (tree);
 395
 396 /* User label prefix in effect for this compilation.  */
 397 extern const char *user_label_prefix;
 398
 399 /* Default target function prologue and epilogue assembler output.  */
 400 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
 401
 402 /* Default target hook that outputs nothing to a stream.  */
 403 extern void no_asm_to_stream (FILE *);
 404
 405 /* Flags controlling properties of a section.  */
 406 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 407 #define SECTION_CODE     0x00100        /* contains code */
 408 #define SECTION_WRITE    0x00200        /* data is writable */
 409 #define SECTION_DEBUG    0x00400        /* contains debug data */
 410 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 411 #define SECTION_SMALL    0x01000        /* contains "small data" */
 412 #define SECTION_BSS      0x02000        /* contains zeros only */
 413 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 414 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 415 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 416                                            embedded zeros */
 417 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 418 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 419 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 420 #define SECTION_DECLARED 0x100000       /* section has been used */
 421 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 422 #define SECTION_COMMON   0x800000       /* contains common data */
 423 #define SECTION_MACH_DEP 0x1000000      /* subsequent bits reserved for target */
 424
 425 /* This SECTION_STYLE is used for unnamed sections that we can switch
 426    to using a special assembler directive.  */
 427 #define SECTION_UNNAMED  0x000000
 428
 429 /* This SECTION_STYLE is used for named sections that we can switch
 430    to using a general section directive.  */
 431 #define SECTION_NAMED    0x200000
 432
 433 /* This SECTION_STYLE is used for sections that we cannot switch to at
 434    all.  The choice of section is implied by the directive that we use
 435    to declare the object.  */
 436 #define SECTION_NOSWITCH 0x400000
 437
 438 /* A helper function for default_elf_select_section and
 439    default_elf_unique_section.  Categorizes the DECL.  */
 440
 441 enum section_category
 442 {
 443   SECCAT_TEXT,
 444
 445   SECCAT_RODATA,
 446   SECCAT_RODATA_MERGE_STR,
 447   SECCAT_RODATA_MERGE_STR_INIT,
 448   SECCAT_RODATA_MERGE_CONST,
 449   SECCAT_SRODATA,
 450
 451   SECCAT_DATA,
 452
 453   /* To optimize loading of shared programs, define following subsections
 454      of data section:
 455         _REL    Contains data that has relocations, so they get grouped
 456                 together and dynamic linker will visit fewer pages in memory.
 457         _RO     Contains data that is otherwise read-only.  This is useful
 458                 with prelinking as most relocations won't be dynamically
 459                 linked and thus stay read only.
 460         _LOCAL  Marks data containing relocations only to local objects.
 461                 These relocations will get fully resolved by prelinking.  */
 462   SECCAT_DATA_REL,
 463   SECCAT_DATA_REL_LOCAL,
 464   SECCAT_DATA_REL_RO,
 465   SECCAT_DATA_REL_RO_LOCAL,
 466
 467   SECCAT_SDATA,
 468   SECCAT_TDATA,
 469
 470   SECCAT_BSS,
 471   SECCAT_SBSS,
 472   SECCAT_TBSS
 473 };
 474
 475 /* Information that is provided by all instances of the section type.  */
 476 struct section_common GTY(()) {
 477   /* The set of SECTION_* flags that apply to this section.  */
 478   unsigned int flags;
 479 };
 480
 481 /* Information about a SECTION_NAMED section.  */
 482 struct named_section GTY(()) {
 483   struct section_common common;
 484
 485   /* The name of the section.  */
 486   const char *name;
 487
 488   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 489      section is associated.  */
 490   tree decl;
 491 };
 492
 493 /* A callback that writes the assembly code for switching to an unnamed
 494    section.  The argument provides callback-specific data.  */
 495 typedef void (*unnamed_section_callback) (const void *);
 496
 497 /* Information about a SECTION_UNNAMED section.  */
 498 struct unnamed_section GTY(()) {
 499   struct section_common common;
 500
 501   /* The callback used to switch to the section, and the data that
 502      should be passed to the callback.  */
 503   unnamed_section_callback GTY ((skip)) callback;
 504   const void *GTY ((skip)) data;
 505
 506   /* The next entry in the chain of unnamed sections.  */
 507   section *next;
 508 };
 509
 510 /* A callback that writes the assembly code for a decl in a
 511    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 512    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 513    in bytes and ROUNDED is that size rounded up to the next
 514    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 515
 516    Return true if the callback used DECL_ALIGN to set the object's
 517    alignment.  A false return value implies that we are relying
 518    on the rounded size to align the decl.  */
 519 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 520                                            unsigned HOST_WIDE_INT size,
 521                                            unsigned HOST_WIDE_INT rounded);
 522
 523 /* Information about a SECTION_NOSWITCH section.  */
 524 struct noswitch_section GTY(()) {
 525   struct section_common common;
 526
 527   /* The callback used to assemble decls in this section.  */
 528   noswitch_section_callback GTY ((skip)) callback;
 529 };
 530
 531 /* Information about a section, which may be named or unnamed.  */
 532 union section GTY ((desc ("SECTION_STYLE (&(%h))")))
 533 {
 534   struct section_common GTY ((skip)) common;
 535   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 536   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 537   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 538 };
 539
 540 /* Return the style of section SECT.  */
 541 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 542
 543 struct object_block;
 544
 545 /* Special well-known sections.  */
 546 extern GTY(()) section *text_section;
 547 extern GTY(()) section *data_section;
 548 extern GTY(()) section *readonly_data_section;
 549 extern GTY(()) section *sdata_section;
 550 extern GTY(()) section *ctors_section;
 551 extern GTY(()) section *dtors_section;
 552 extern GTY(()) section *bss_section;
 553 extern GTY(()) section *sbss_section;
 554 extern GTY(()) section *exception_section;
 555 extern GTY(()) section *eh_frame_section;
 556 extern GTY(()) section *tls_comm_section;
 557 extern GTY(()) section *comm_section;
 558 extern GTY(()) section *lcomm_section;
 559 extern GTY(()) section *bss_noswitch_section;
 560
 561 extern GTY(()) section *in_section;
 562 extern GTY(()) bool in_cold_section_p;
 563
 564 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 565                                      const void *);
 566 extern section *get_section (const char *, unsigned int, tree);
 567 extern section *get_named_section (tree, const char *, int);
 568 extern void place_block_symbol (rtx);
 569 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 570                                enum tls_model);
 571 extern section *mergeable_constant_section (enum machine_mode,
 572                                             unsigned HOST_WIDE_INT,
 573                                             unsigned int);
 574 extern section *function_section (tree);
 575 extern section *unlikely_text_section (void);
 576 extern section *current_function_section (void);
 577
 578 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
 579    not) section for PRIORITY.  */
 580 extern section *get_cdtor_priority_section (int, bool);
 581
 582 extern bool unlikely_text_section_p (section *);
 583 extern void switch_to_section (section *);
 584 extern void output_section_asm_op (const void *);
 585
 586 extern unsigned int default_section_type_flags (tree, const char *, int);
 587 extern unsigned int default_section_type_flags_1 (tree, const char *, int, int);
 588
 589 extern bool have_global_bss_p (void);
 590 extern void default_no_named_section (const char *, unsigned int, tree);
 591 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 592 extern enum section_category categorize_decl_for_section (tree, int, int);
 593 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 594 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 595
 596 extern void default_stabs_asm_out_destructor (rtx, int);
 597 extern void default_named_section_asm_out_destructor (rtx, int);
 598 extern void default_dtor_section_asm_out_destructor (rtx, int);
 599 extern void default_stabs_asm_out_constructor (rtx, int);
 600 extern void default_named_section_asm_out_constructor (rtx, int);
 601 extern void default_ctor_section_asm_out_constructor (rtx, int);
 602
 603 extern section *default_select_section (tree, int,
 604                                                unsigned HOST_WIDE_INT);
 605 extern section *default_elf_select_section (tree, int,
 606                                                    unsigned HOST_WIDE_INT);
 607 extern section *default_elf_select_section_1 (tree, int,
 608                                                      unsigned HOST_WIDE_INT,
 609                                                      int);
 610 extern void default_unique_section (tree, int);
 611 extern void default_unique_section_1 (tree, int, int);
 612 extern section *default_function_rodata_section (tree);
 613 extern section *default_no_function_rodata_section (tree);
 614 extern section *default_select_rtx_section (enum machine_mode, rtx,
 615                                             unsigned HOST_WIDE_INT);
 616 extern section *default_elf_select_rtx_section (enum machine_mode, rtx,
 617                                                 unsigned HOST_WIDE_INT);
 618 extern void default_encode_section_info (tree, rtx, int);
 619 extern const char *default_strip_name_encoding (const char *);
 620 extern void default_asm_output_anchor (rtx);
 621 extern bool default_use_anchors_for_symbol_p (rtx);
 622 extern bool default_binds_local_p (tree);
 623 extern bool default_binds_local_p_1 (tree, int);
 624 extern void default_globalize_label (FILE *, const char *);
 625 extern void default_globalize_decl_name (FILE *, tree);
 626 extern void default_emit_unwind_label (FILE *, tree, int, int);
 627 extern void default_emit_except_table_label (FILE *);
 628 extern void default_internal_label (FILE *, const char *, unsigned long);
 629 extern void default_file_start (void);
 630 extern void file_end_indicate_exec_stack (void);
 631 extern bool default_valid_pointer_mode (enum machine_mode);
 632
 633 extern void default_elf_asm_output_external (FILE *file, tree,
 634                                              const char *);
 635 extern int maybe_assemble_visibility (tree);
 636
 637 extern int default_address_cost (rtx);
 638
 639 /* dbxout helper functions */
 640 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
 641
 642 extern void dbxout_int (int);
 643 extern void dbxout_stabd (int, int);
 644 extern void dbxout_begin_stabn (int);
 645 extern void dbxout_begin_stabn_sline (int);
 646 extern void dbxout_begin_empty_stabs (int);
 647 extern void dbxout_begin_simple_stabs (const char *, int);
 648 extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
 649
 650 extern void dbxout_stab_value_zero (void);
 651 extern void dbxout_stab_value_label (const char *);
 652 extern void dbxout_stab_value_label_diff (const char *, const char *);
 653 extern void dbxout_stab_value_internal_label (const char *, int *);
 654 extern void dbxout_stab_value_internal_label_diff (const char *, int *,
 655                                                    const char *);
 656
 657 #endif
 658
 659 #endif /* ! GCC_OUTPUT_H */