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 /* 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 /* Make the rtl for variable VAR be volatile.
 171    Use this only for static variables.  */
 172 extern void make_var_volatile (tree);
 173
 174 extern void assemble_alias (tree, tree);
 175
 176 extern void default_assemble_visibility (tree, int);
 177
 178 /* Output a string of literal assembler code
 179    for an `asm' keyword used between functions.  */
 180 extern void assemble_asm (tree);
 181
 182 /* Output assembler code for the constant pool of a function and associated
 183    with defining the name of the function.  DECL describes the function.
 184    NAME is the function's name.  For the constant pool, we use the current
 185    constant pool data.  */
 186 extern void assemble_start_function (tree, const char *);
 187
 188 /* Output assembler code associated with defining the size of the
 189    function.  DECL describes the function.  NAME is the function's name.  */
 190 extern void assemble_end_function (tree, const char *);
 191
 192 /* Assemble everything that is needed for a variable or function declaration.
 193    Not used for automatic variables, and not used for function definitions.
 194    Should not be called for variables of incomplete structure type.
 195
 196    TOP_LEVEL is nonzero if this variable has file scope.
 197    AT_END is nonzero if this is the special handling, at end of compilation,
 198    to define things that have had only tentative definitions.
 199    DONT_OUTPUT_DATA if nonzero means don't actually output the
 200    initial value (that will be done by the caller).  */
 201 extern void assemble_variable (tree, int, int, int);
 202
 203 /* Compute the alignment of variable specified by DECL.
 204    DONT_OUTPUT_DATA is from assemble_variable.  */
 205 extern void align_variable (tree decl, bool dont_output_data);
 206
 207 /* Queue for outputing something to declare an external symbol to the
 208    assembler.  (Most assemblers don't need this, so we normally output
 209    nothing.)  Do nothing if DECL is not external.  */
 210 extern void assemble_external (tree);
 211
 212 /* Assemble code to leave SIZE bytes of zeros.  */
 213 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 214
 215 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 216 extern void assemble_align (int);
 217
 218 /* Assemble a string constant with the specified C string as contents.  */
 219 extern void assemble_string (const char *, int);
 220
 221 /* Similar, for calling a library function FUN.  */
 222 extern void assemble_external_libcall (rtx);
 223
 224 /* Assemble a label named NAME.  */
 225 extern void assemble_label (const char *);
 226
 227 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 228    starts with a *, the rest of NAME is output verbatim.  Otherwise
 229    NAME is transformed in a target-specific way (usually by the
 230    addition of an underscore).  */
 231 extern void assemble_name_raw (FILE *, const char *);
 232
 233 /* Like assemble_name_raw, but should be used when NAME might refer to
 234    an entity that is also represented as a tree (like a function or
 235    variable).  If NAME does refer to such an entity, that entity will
 236    be marked as referenced.  */
 237 extern void assemble_name (FILE *, const char *);
 238
 239 /* Return the assembler directive for creating a given kind of integer
 240    object.  SIZE is the number of bytes in the object and ALIGNED_P
 241    indicates whether it is known to be aligned.  Return NULL if the
 242    assembly dialect has no such directive.
 243
 244    The returned string should be printed at the start of a new line and
 245    be followed immediately by the object's initial value.  */
 246 extern const char *integer_asm_op (int, int);
 247
 248 /* Use directive OP to assemble an integer object X.  Print OP at the
 249    start of the line, followed immediately by the value of X.  */
 250 extern void assemble_integer_with_op (const char *, rtx);
 251
 252 /* The default implementation of the asm_out.integer target hook.  */
 253 extern bool default_assemble_integer (rtx, unsigned int, int);
 254
 255 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 256    the alignment of the integer in bits.  Return 1 if we were able to output
 257    the constant, otherwise 0.  If FORCE is nonzero the constant must
 258    be outputable. */
 259 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 260
 261 /* An interface to assemble_integer for the common case in which a value is
 262    fully aligned and must be printed.  VALUE is the value of the integer
 263    object and SIZE is the number of bytes it contains.  */
 264 #define assemble_aligned_integer(SIZE, VALUE) \
 265   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 266
 267 #ifdef REAL_VALUE_TYPE_SIZE
 268 /* Assemble the floating-point constant D into an object of size MODE.  */
 269 extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
 270 #endif
 271
 272 /* Return the size of the constant pool.  */
 273 extern int get_pool_size (void);
 274
 275 #ifdef HAVE_peephole
 276 extern rtx peephole (rtx);
 277 #endif
 278
 279 extern void output_shared_constant_pool (void);
 280
 281 extern void output_object_blocks (void);
 282
 283 /* Whether a constructor CTOR is a valid static constant initializer if all
 284    its elements are.  This used to be internal to initializer_constant_valid_p
 285    and has been exposed to let other functions like categorize_ctor_elements
 286    evaluate the property while walking a constructor for other purposes.  */
 287
 288 extern bool constructor_static_from_elts_p (tree);
 289
 290 /* Return nonzero if VALUE is a valid constant-valued expression
 291    for use in initializing a static variable; one that can be an
 292    element of a "constant" initializer.
 293
 294    Return null_pointer_node if the value is absolute;
 295    if it is relocatable, return the variable that determines the relocation.
 296    We assume that VALUE has been folded as much as possible;
 297    therefore, we do not need to check for such things as
 298    arithmetic-combinations of integers.  */
 299 extern tree initializer_constant_valid_p (tree, tree);
 300
 301 /* Output assembler code for constant EXP to FILE, with no label.
 302    This includes the pseudo-op such as ".int" or ".byte", and a newline.
 303    Assumes output_addressed_constants has been done on EXP already.
 304
 305    Generate exactly SIZE bytes of assembler data, padding at the end
 306    with zeros if necessary.  SIZE must always be specified.
 307
 308    ALIGN is the alignment in bits that may be assumed for the data.  */
 309 extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
 310
 311 /* When outputting delayed branch sequences, this rtx holds the
 312    sequence being output.  It is null when no delayed branch
 313    sequence is being output, so it can be used as a test in the
 314    insn output code.
 315
 316    This variable is defined  in final.c.  */
 317 extern rtx final_sequence;
 318
 319 /* The line number of the beginning of the current function.  Various
 320    md code needs this so that it can output relative linenumbers.  */
 321
 322 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 323 extern int sdb_begin_function_line;
 324 #endif
 325
 326 /* File in which assembler code is being written.  */
 327
 328 #ifdef BUFSIZ
 329 extern FILE *asm_out_file;
 330 #endif
 331
 332 /* The first global object in the file.  */
 333 extern const char *first_global_object_name;
 334
 335 /* The first weak object in the file.  */
 336 extern const char *weak_global_object_name;
 337
 338 /* Nonzero if function being compiled doesn't contain any calls
 339    (ignoring the prologue and epilogue).  This is set prior to
 340    local register allocation and is valid for the remaining
 341    compiler passes.  */
 342
 343 extern int current_function_is_leaf;
 344
 345 /* Nonzero if function being compiled doesn't modify the stack pointer
 346    (ignoring the prologue and epilogue).  This is only valid after
 347    life_analysis has run.  */
 348
 349 extern int current_function_sp_is_unchanging;
 350
 351 /* Nonzero if the function being compiled is a leaf function which only
 352    uses leaf registers.  This is valid after reload (specifically after
 353    sched2) and is useful only if the port defines LEAF_REGISTERS.  */
 354
 355 extern int current_function_uses_only_leaf_regs;
 356
 357 /* Default file in which to dump debug output.  */
 358
 359 #ifdef BUFSIZ
 360 extern FILE *dump_file;
 361 #endif
 362
 363 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 364 extern rtx current_insn_predicate;
 365
 366 /* Last insn processed by final_scan_insn.  */
 367 extern rtx current_output_insn;
 368
 369 /* Nonzero while outputting an `asm' with operands.
 370    This means that inconsistencies are the user's fault, so don't die.
 371    The precise value is the insn being output, to pass to error_for_asm.  */
 372 extern rtx this_is_asm_operands;
 373
 374 /* Carry information from ASM_DECLARE_OBJECT_NAME
 375    to ASM_FINISH_DECLARE_OBJECT.  */
 376 extern int size_directive_output;
 377 extern tree last_assemble_variable_decl;
 378
 379 extern bool first_function_block_is_cold;
 380
 381 /* Decide whether DECL needs to be in a writable section.
 382    RELOC is the same as for SELECT_SECTION.  */
 383 extern bool decl_readonly_section (tree, int);
 384 extern bool decl_readonly_section_1 (tree, int, int);
 385
 386 /* This can be used to compute RELOC for the function above, when
 387    given a constant expression.  */
 388 extern int compute_reloc_for_constant (tree);
 389
 390 /* User label prefix in effect for this compilation.  */
 391 extern const char *user_label_prefix;
 392
 393 /* Default target function prologue and epilogue assembler output.  */
 394 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
 395
 396 /* Default target hook that outputs nothing to a stream.  */
 397 extern void no_asm_to_stream (FILE *);
 398
 399 /* Flags controlling properties of a section.  */
 400 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 401 #define SECTION_CODE     0x00100        /* contains code */
 402 #define SECTION_WRITE    0x00200        /* data is writable */
 403 #define SECTION_DEBUG    0x00400        /* contains debug data */
 404 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 405 #define SECTION_SMALL    0x01000        /* contains "small data" */
 406 #define SECTION_BSS      0x02000        /* contains zeros only */
 407 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 408 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 409 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 410                                            embedded zeros */
 411 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 412 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 413 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 414 #define SECTION_DECLARED 0x100000       /* section has been used */
 415 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 416 #define SECTION_COMMON   0x800000       /* contains common data */
 417 #define SECTION_MACH_DEP 0x1000000      /* subsequent bits reserved for target */
 418
 419 /* This SECTION_STYLE is used for unnamed sections that we can switch
 420    to using a special assembler directive.  */
 421 #define SECTION_UNNAMED  0x000000
 422
 423 /* This SECTION_STYLE is used for named sections that we can switch
 424    to using a general section directive.  */
 425 #define SECTION_NAMED    0x200000
 426
 427 /* This SECTION_STYLE is used for sections that we cannot switch to at
 428    all.  The choice of section is implied by the directive that we use
 429    to declare the object.  */
 430 #define SECTION_NOSWITCH 0x400000
 431
 432 /* A helper function for default_elf_select_section and
 433    default_elf_unique_section.  Categorizes the DECL.  */
 434
 435 enum section_category
 436 {
 437   SECCAT_TEXT,
 438
 439   SECCAT_RODATA,
 440   SECCAT_RODATA_MERGE_STR,
 441   SECCAT_RODATA_MERGE_STR_INIT,
 442   SECCAT_RODATA_MERGE_CONST,
 443   SECCAT_SRODATA,
 444
 445   SECCAT_DATA,
 446
 447   /* To optimize loading of shared programs, define following subsections
 448      of data section:
 449         _REL    Contains data that has relocations, so they get grouped
 450                 together and dynamic linker will visit fewer pages in memory.
 451         _RO     Contains data that is otherwise read-only.  This is useful
 452                 with prelinking as most relocations won't be dynamically
 453                 linked and thus stay read only.
 454         _LOCAL  Marks data containing relocations only to local objects.
 455                 These relocations will get fully resolved by prelinking.  */
 456   SECCAT_DATA_REL,
 457   SECCAT_DATA_REL_LOCAL,
 458   SECCAT_DATA_REL_RO,
 459   SECCAT_DATA_REL_RO_LOCAL,
 460
 461   SECCAT_SDATA,
 462   SECCAT_TDATA,
 463
 464   SECCAT_BSS,
 465   SECCAT_SBSS,
 466   SECCAT_TBSS
 467 };
 468
 469 /* Information that is provided by all instances of the section type.  */
 470 struct section_common GTY(()) {
 471   /* The set of SECTION_* flags that apply to this section.  */
 472   unsigned int flags;
 473 };
 474
 475 /* Information about a SECTION_NAMED section.  */
 476 struct named_section GTY(()) {
 477   struct section_common common;
 478
 479   /* The name of the section.  */
 480   const char *name;
 481
 482   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 483      section is associated.  */
 484   tree decl;
 485 };
 486
 487 /* A callback that writes the assembly code for switching to an unnamed
 488    section.  The argument provides callback-specific data.  */
 489 typedef void (*unnamed_section_callback) (const void *);
 490
 491 /* Information about a SECTION_UNNAMED section.  */
 492 struct unnamed_section GTY(()) {
 493   struct section_common common;
 494
 495   /* The callback used to switch to the section, and the data that
 496      should be passed to the callback.  */
 497   unnamed_section_callback GTY ((skip)) callback;
 498   const void *GTY ((skip)) data;
 499
 500   /* The next entry in the chain of unnamed sections.  */
 501   section *next;
 502 };
 503
 504 /* A callback that writes the assembly code for a decl in a
 505    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 506    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 507    in bytes and ROUNDED is that size rounded up to the next
 508    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 509
 510    Return true if the callback used DECL_ALIGN to set the object's
 511    alignment.  A false return value implies that we are relying
 512    on the rounded size to align the decl.  */
 513 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 514                                            unsigned HOST_WIDE_INT size,
 515                                            unsigned HOST_WIDE_INT rounded);
 516
 517 /* Information about a SECTION_NOSWITCH section.  */
 518 struct noswitch_section GTY(()) {
 519   struct section_common common;
 520
 521   /* The callback used to assemble decls in this section.  */
 522   noswitch_section_callback GTY ((skip)) callback;
 523 };
 524
 525 /* Information about a section, which may be named or unnamed.  */
 526 union section GTY ((desc ("SECTION_STYLE (&(%h))")))
 527 {
 528   struct section_common GTY ((skip)) common;
 529   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 530   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 531   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 532 };
 533
 534 /* Return the style of section SECT.  */
 535 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 536
 537 struct object_block;
 538
 539 /* Special well-known sections.  */
 540 extern GTY(()) section *text_section;
 541 extern GTY(()) section *data_section;
 542 extern GTY(()) section *readonly_data_section;
 543 extern GTY(()) section *sdata_section;
 544 extern GTY(()) section *ctors_section;
 545 extern GTY(()) section *dtors_section;
 546 extern GTY(()) section *bss_section;
 547 extern GTY(()) section *sbss_section;
 548 extern GTY(()) section *exception_section;
 549 extern GTY(()) section *eh_frame_section;
 550 extern GTY(()) section *tls_comm_section;
 551 extern GTY(()) section *comm_section;
 552 extern GTY(()) section *lcomm_section;
 553 extern GTY(()) section *bss_noswitch_section;
 554
 555 extern GTY(()) section *in_section;
 556 extern GTY(()) bool in_cold_section_p;
 557
 558 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 559                                      const void *);
 560 extern section *get_section (const char *, unsigned int, tree);
 561 extern section *get_named_section (tree, const char *, int);
 562 extern void place_block_symbol (rtx);
 563 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 564                                enum tls_model);
 565 extern section *mergeable_constant_section (enum machine_mode,
 566                                             unsigned HOST_WIDE_INT,
 567                                             unsigned int);
 568 extern section *function_section (tree);
 569 extern section *unlikely_text_section (void);
 570 extern section *current_function_section (void);
 571
 572 extern bool unlikely_text_section_p (section *);
 573 extern void switch_to_section (section *);
 574 extern void output_section_asm_op (const void *);
 575
 576 extern unsigned int default_section_type_flags (tree, const char *, int);
 577 extern unsigned int default_section_type_flags_1 (tree, const char *, int, int);
 578
 579 extern bool have_global_bss_p (void);
 580 extern void default_no_named_section (const char *, unsigned int, tree);
 581 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 582 extern enum section_category categorize_decl_for_section (tree, int, int);
 583 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 584 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 585
 586 extern void default_stabs_asm_out_destructor (rtx, int);
 587 extern void default_named_section_asm_out_destructor (rtx, int);
 588 extern void default_dtor_section_asm_out_destructor (rtx, int);
 589 extern void default_stabs_asm_out_constructor (rtx, int);
 590 extern void default_named_section_asm_out_constructor (rtx, int);
 591 extern void default_ctor_section_asm_out_constructor (rtx, int);
 592
 593 extern section *default_select_section (tree, int,
 594                                                unsigned HOST_WIDE_INT);
 595 extern section *default_elf_select_section (tree, int,
 596                                                    unsigned HOST_WIDE_INT);
 597 extern section *default_elf_select_section_1 (tree, int,
 598                                                      unsigned HOST_WIDE_INT,
 599                                                      int);
 600 extern void default_unique_section (tree, int);
 601 extern void default_unique_section_1 (tree, int, int);
 602 extern section *default_function_rodata_section (tree);
 603 extern section *default_no_function_rodata_section (tree);
 604 extern section *default_select_rtx_section (enum machine_mode, rtx,
 605                                             unsigned HOST_WIDE_INT);
 606 extern section *default_elf_select_rtx_section (enum machine_mode, rtx,
 607                                                 unsigned HOST_WIDE_INT);
 608 extern void default_encode_section_info (tree, rtx, int);
 609 extern const char *default_strip_name_encoding (const char *);
 610 extern void default_asm_output_anchor (rtx);
 611 extern bool default_use_anchors_for_symbol_p (rtx);
 612 extern bool default_binds_local_p (tree);
 613 extern bool default_binds_local_p_1 (tree, int);
 614 extern void default_globalize_label (FILE *, const char *);
 615 extern void default_emit_unwind_label (FILE *, tree, int, int);
 616 extern void default_emit_except_table_label (FILE *);
 617 extern void default_internal_label (FILE *, const char *, unsigned long);
 618 extern void default_file_start (void);
 619 extern void file_end_indicate_exec_stack (void);
 620 extern bool default_valid_pointer_mode (enum machine_mode);
 621
 622 extern void default_elf_asm_output_external (FILE *file, tree,
 623                                              const char *);
 624 extern int maybe_assemble_visibility (tree);
 625
 626 extern int default_address_cost (rtx);
 627
 628 /* dbxout helper functions */
 629 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
 630
 631 extern void dbxout_int (int);
 632 extern void dbxout_stabd (int, int);
 633 extern void dbxout_begin_stabn (int);
 634 extern void dbxout_begin_stabn_sline (int);
 635 extern void dbxout_begin_empty_stabs (int);
 636 extern void dbxout_begin_simple_stabs (const char *, int);
 637 extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
 638
 639 extern void dbxout_stab_value_zero (void);
 640 extern void dbxout_stab_value_label (const char *);
 641 extern void dbxout_stab_value_label_diff (const char *, const char *);
 642 extern void dbxout_stab_value_internal_label (const char *, int *);
 643 extern void dbxout_stab_value_internal_label_diff (const char *, int *,
 644                                                    const char *);
 645
 646 #endif
 647
 648 #endif /* ! GCC_OUTPUT_H */