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 /* Compute branch alignments based on frequency information in the CFG.  */
  27 extern void compute_alignments (void);
  28
  29 /* Initialize data in final at the beginning of a compilation.  */
  30 extern void init_final (const char *);
  31
  32 /* Enable APP processing of subsequent output.
  33    Used before the output from an `asm' statement.  */
  34 extern void app_enable (void);
  35
  36 /* Disable APP processing of subsequent output.
  37    Called from varasm.c before most kinds of output.  */
  38 extern void app_disable (void);
  39
  40 /* Return the number of slots filled in the current
  41    delayed branch sequence (we don't count the insn needing the
  42    delay slot).   Zero if not in a delayed branch sequence.  */
  43 extern int dbr_sequence_length (void);
  44
  45 /* Indicate that branch shortening hasn't yet been done.  */
  46 extern void init_insn_lengths (void);
  47
  48 /* Obtain the current length of an insn.  If branch shortening has been done,
  49    get its actual length.  Otherwise, get its maximum length.  */
  50 extern int get_attr_length (rtx);
  51
  52 /* Make a pass over all insns and compute their actual lengths by shortening
  53    any branches of variable length if possible.  */
  54 extern void shorten_branches (rtx);
  55
  56 /* Output assembler code for the start of a function,
  57    and initialize some of the variables in this file
  58    for the new function.  The label for the function and associated
  59    assembler pseudo-ops have already been output in
  60    `assemble_start_function'.  */
  61 extern void final_start_function (rtx, FILE *, int);
  62
  63 /* Output assembler code for the end of a function.
  64    For clarity, args are same as those of `final_start_function'
  65    even though not all of them are needed.  */
  66 extern void final_end_function (void);
  67
  68 /* Output assembler code for some insns: all or part of a function.  */
  69 extern void final (rtx, FILE *, int);
  70
  71 /* The final scan for one insn, INSN.  Args are same as in `final', except
  72    that INSN is the insn being scanned.  Value returned is the next insn to
  73    be scanned.  */
  74 extern rtx final_scan_insn (rtx, FILE *, int, int, int *);
  75
  76 /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
  77    subreg of.  */
  78 extern rtx alter_subreg (rtx *);
  79
  80 /* Report inconsistency between the assembler template and the operands.
  81    In an `asm', it's the user's fault; otherwise, the compiler's fault.  */
  82 extern void output_operand_lossage (const char *, ...) ATTRIBUTE_PRINTF_1;
  83
  84 /* Output a string of assembler code, substituting insn operands.
  85    Defined in final.c.  */
  86 extern void output_asm_insn (const char *, rtx *);
  87
  88 /* Compute a worst-case reference address of a branch so that it
  89    can be safely used in the presence of aligned labels.
  90    Defined in final.c.  */
  91 extern int insn_current_reference_address (rtx);
  92
  93 /* Find the alignment associated with a CODE_LABEL.
  94    Defined in final.c.  */
  95 extern int label_to_alignment (rtx);
  96
  97 /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol.  */
  98 extern void output_asm_label (rtx);
  99
 100 /* Print a memory reference operand for address X
 101    using machine-dependent assembler syntax.  */
 102 extern void output_address (rtx);
 103
 104 /* Print an integer constant expression in assembler syntax.
 105    Addition and subtraction are the only arithmetic
 106    that may appear in these expressions.  */
 107 extern void output_addr_const (FILE *, rtx);
 108
 109 /* Output a string of assembler code, substituting numbers, strings
 110    and fixed syntactic prefixes.  */
 111 #if GCC_VERSION >= 3004
 112 #define ATTRIBUTE_ASM_FPRINTF(m, n) __attribute__ ((__format__ (__asm_fprintf__, m, n))) ATTRIBUTE_NONNULL(m)
 113 /* This is a magic identifier which allows GCC to figure out the type
 114    of HOST_WIDE_INT for %wd specifier checks.  You must issue this
 115    typedef before using the __asm_fprintf__ format attribute.  */
 116 typedef HOST_WIDE_INT __gcc_host_wide_int__;
 117 #else
 118 #define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
 119 #endif
 120
 121 extern void asm_fprintf (FILE *file, const char *p, ...)
 122      ATTRIBUTE_ASM_FPRINTF(2, 3);
 123
 124 /* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
 125    words.  */
 126 extern void split_double (rtx, rtx *, rtx *);
 127
 128 /* Return nonzero if this function has no function calls.  */
 129 extern int leaf_function_p (void);
 130
 131 /* Return 1 if branch is a forward branch.
 132    Uses insn_shuid array, so it works only in the final pass.  May be used by
 133    output templates to add branch prediction hints, for example.  */
 134 extern int final_forward_branch_p (rtx);
 135
 136 /* Return 1 if this function uses only the registers that can be
 137    safely renumbered.  */
 138 extern int only_leaf_regs_used (void);
 139
 140 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
 141    available in leaf functions.  */
 142 extern void leaf_renumber_regs_insn (rtx);
 143
 144 /* Locate the proper template for the given insn-code.  */
 145 extern const char *get_insn_template (int, rtx);
 146
 147 /* Functions in flow.c */
 148 extern int regno_clobbered_at_setjmp (int);
 149
 150 /* Functions in varasm.c.  */
 151
 152 /* Tell assembler to switch to text section.  */
 153 extern void text_section (void);
 154
 155 /* Tell assembler to switch to unlikely-to-be-executed text section.  */
 156 extern void unlikely_text_section (void);
 157
 158 /* Tell assembler to switch to data section.  */
 159 extern void data_section (void);
 160
 161 /* Tell assembler to switch to read-only data section.  This is normally
 162    the text section.  */
 163 extern void readonly_data_section (void);
 164
 165 /* Determine if we're in the text section.  */
 166 extern int in_text_section (void);
 167
 168 /* Determine if we're in the unlikely-to-be-executed text section.  */
 169 extern int in_unlikely_text_section (void);
 170
 171 #ifdef CTORS_SECTION_ASM_OP
 172 extern void ctors_section (void);
 173 #endif
 174
 175 #ifdef DTORS_SECTION_ASM_OP
 176 extern void dtors_section (void);
 177 #endif
 178
 179 #ifdef BSS_SECTION_ASM_OP
 180 extern void bss_section (void);
 181 #endif
 182
 183 #ifdef INIT_SECTION_ASM_OP
 184 extern void init_section (void);
 185 #endif
 186
 187 #ifdef FINI_SECTION_ASM_OP
 188 extern void fini_section (void);
 189 #endif
 190
 191 #ifdef EXPORTS_SECTION_ASM_OP
 192 extern void exports_section (void);
 193 #endif
 194
 195 #ifdef DRECTVE_SECTION_ASM_OP
 196 extern void drectve_section (void);
 197 #endif
 198
 199 #ifdef SDATA_SECTION_ASM_OP
 200 extern void sdata_section (void);
 201 #endif
 202
 203 /* Tell assembler to change to section NAME for DECL.
 204    If DECL is NULL, just switch to section NAME.
 205    If NAME is NULL, get the name from DECL.
 206    If RELOC is 1, the initializer for DECL contains relocs.  */
 207 extern void named_section (tree, const char *, int);
 208
 209 /* Tell assembler to switch to the section for function DECL.  */
 210 extern void function_section (tree);
 211
 212 /* Tell assembler to switch to the most recently used text section.  */
 213 extern void current_function_section (tree);
 214
 215 /* Tell assembler to switch to the section for string merging.  */
 216 extern void mergeable_string_section (tree, unsigned HOST_WIDE_INT,
 217                                       unsigned int);
 218
 219 /* Tell assembler to switch to the section for constant merging.  */
 220 extern void mergeable_constant_section (enum machine_mode,
 221                                         unsigned HOST_WIDE_INT, unsigned int);
 222
 223 /* Declare DECL to be a weak symbol.  */
 224 extern void declare_weak (tree);
 225 /* Merge weak status.  */
 226 extern void merge_weak (tree, tree);
 227
 228 /* Emit any pending weak declarations.  */
 229 extern void weak_finish (void);
 230
 231 /* Decode an `asm' spec for a declaration as a register name.
 232    Return the register number, or -1 if nothing specified,
 233    or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
 234    or -3 if ASMSPEC is `cc' and is not recognized,
 235    or -4 if ASMSPEC is `memory' and is not recognized.
 236    Accept an exact spelling or a decimal number.
 237    Prefixes such as % are optional.  */
 238 extern int decode_reg_name (const char *);
 239
 240 /* Make the rtl for variable VAR be volatile.
 241    Use this only for static variables.  */
 242 extern void make_var_volatile (tree);
 243
 244 extern void assemble_alias (tree, tree);
 245
 246 extern void default_assemble_visibility (tree, int);
 247
 248 /* Output a string of literal assembler code
 249    for an `asm' keyword used between functions.  */
 250 extern void assemble_asm (tree);
 251
 252 /* Output assembler code for the constant pool of a function and associated
 253    with defining the name of the function.  DECL describes the function.
 254    NAME is the function's name.  For the constant pool, we use the current
 255    constant pool data.  */
 256 extern void assemble_start_function (tree, const char *);
 257
 258 /* Output assembler code associated with defining the size of the
 259    function.  DECL describes the function.  NAME is the function's name.  */
 260 extern void assemble_end_function (tree, const char *);
 261
 262 /* Assemble everything that is needed for a variable or function declaration.
 263    Not used for automatic variables, and not used for function definitions.
 264    Should not be called for variables of incomplete structure type.
 265
 266    TOP_LEVEL is nonzero if this variable has file scope.
 267    AT_END is nonzero if this is the special handling, at end of compilation,
 268    to define things that have had only tentative definitions.
 269    DONT_OUTPUT_DATA if nonzero means don't actually output the
 270    initial value (that will be done by the caller).  */
 271 extern void assemble_variable (tree, int, int, int);
 272
 273 /* Output something to declare an external symbol to the assembler.
 274    (Most assemblers don't need this, so we normally output nothing.)
 275    Do nothing if DECL is not external.  */
 276 extern void assemble_external (tree);
 277
 278 /* Assemble code to leave SIZE bytes of zeros.  */
 279 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 280
 281 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 282 extern void assemble_align (int);
 283
 284 /* Assemble a string constant with the specified C string as contents.  */
 285 extern void assemble_string (const char *, int);
 286
 287 /* Similar, for calling a library function FUN.  */
 288 extern void assemble_external_libcall (rtx);
 289
 290 /* Assemble a label named NAME.  */
 291 extern void assemble_label (const char *);
 292
 293 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 294    starts with a *, the rest of NAME is output verbatim.  Otherwise
 295    NAME is transformed in a target-specific way (usually by the
 296    addition of an underscore).  */
 297 extern void assemble_name_raw (FILE *, const char *);
 298
 299 /* Like assemble_name_raw, but should be used when NAME might refer to
 300    an entity that is also represented as a tree (like a function or
 301    variable).  If NAME does refer to such an entity, that entity will
 302    be marked as referenced.  */
 303 extern void assemble_name (FILE *, const char *);
 304
 305 /* Return the assembler directive for creating a given kind of integer
 306    object.  SIZE is the number of bytes in the object and ALIGNED_P
 307    indicates whether it is known to be aligned.  Return NULL if the
 308    assembly dialect has no such directive.
 309
 310    The returned string should be printed at the start of a new line and
 311    be followed immediately by the object's initial value.  */
 312 extern const char *integer_asm_op (int, int);
 313
 314 /* Use directive OP to assemble an integer object X.  Print OP at the
 315    start of the line, followed immediately by the value of X.  */
 316 extern void assemble_integer_with_op (const char *, rtx);
 317
 318 /* The default implementation of the asm_out.integer target hook.  */
 319 extern bool default_assemble_integer (rtx, unsigned int, int);
 320
 321 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 322    the alignment of the integer in bits.  Return 1 if we were able to output
 323    the constant, otherwise 0.  If FORCE is nonzero the constant must
 324    be outputable. */
 325 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 326
 327 /* An interface to assemble_integer for the common case in which a value is
 328    fully aligned and must be printed.  VALUE is the value of the integer
 329    object and SIZE is the number of bytes it contains.  */
 330 #define assemble_aligned_integer(SIZE, VALUE) \
 331   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 332
 333 #ifdef REAL_VALUE_TYPE_SIZE
 334 /* Assemble the floating-point constant D into an object of size MODE.  */
 335 extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
 336 #endif
 337
 338 /* Return the size of the constant pool.  */
 339 extern int get_pool_size (void);
 340
 341 #ifdef HAVE_peephole
 342 extern rtx peephole (rtx);
 343 #endif
 344
 345 /* Write all the constants in the constant pool.  */
 346 extern void output_constant_pool (const char *, tree);
 347
 348 /* Return nonzero if VALUE is a valid constant-valued expression
 349    for use in initializing a static variable; one that can be an
 350    element of a "constant" initializer.
 351
 352    Return null_pointer_node if the value is absolute;
 353    if it is relocatable, return the variable that determines the relocation.
 354    We assume that VALUE has been folded as much as possible;
 355    therefore, we do not need to check for such things as
 356    arithmetic-combinations of integers.  */
 357 extern tree initializer_constant_valid_p (tree, tree);
 358
 359 /* Output assembler code for constant EXP to FILE, with no label.
 360    This includes the pseudo-op such as ".int" or ".byte", and a newline.
 361    Assumes output_addressed_constants has been done on EXP already.
 362
 363    Generate exactly SIZE bytes of assembler data, padding at the end
 364    with zeros if necessary.  SIZE must always be specified.
 365
 366    ALIGN is the alignment in bits that may be assumed for the data.  */
 367 extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
 368
 369 /* When outputting delayed branch sequences, this rtx holds the
 370    sequence being output.  It is null when no delayed branch
 371    sequence is being output, so it can be used as a test in the
 372    insn output code.
 373
 374    This variable is defined  in final.c.  */
 375 extern rtx final_sequence;
 376
 377 /* The line number of the beginning of the current function.  Various
 378    md code needs this so that it can output relative linenumbers.  */
 379
 380 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 381 extern int sdb_begin_function_line;
 382 #endif
 383
 384 /* File in which assembler code is being written.  */
 385
 386 #ifdef BUFSIZ
 387 extern FILE *asm_out_file;
 388 #endif
 389
 390 /* The first global object in the file.  */
 391 extern const char *first_global_object_name;
 392
 393 /* The first weak object in the file.  */
 394 extern const char *weak_global_object_name;
 395
 396 /* Nonzero if function being compiled doesn't contain any calls
 397    (ignoring the prologue and epilogue).  This is set prior to
 398    local register allocation and is valid for the remaining
 399    compiler passes.  */
 400
 401 extern int current_function_is_leaf;
 402
 403 /* Nonzero if function being compiled doesn't modify the stack pointer
 404    (ignoring the prologue and epilogue).  This is only valid after
 405    life_analysis has run.  */
 406
 407 extern int current_function_sp_is_unchanging;
 408
 409 /* Nonzero if the function being compiled is a leaf function which only
 410    uses leaf registers.  This is valid after reload (specifically after
 411    sched2) and is useful only if the port defines LEAF_REGISTERS.  */
 412
 413 extern int current_function_uses_only_leaf_regs;
 414
 415 /* Default file in which to dump debug output.  */
 416
 417 #ifdef BUFSIZ
 418 extern FILE *dump_file;
 419 #endif
 420
 421 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 422 extern rtx current_insn_predicate;
 423
 424 /* Last insn processed by final_scan_insn.  */
 425 extern rtx current_output_insn;
 426
 427 /* Nonzero while outputting an `asm' with operands.
 428    This means that inconsistencies are the user's fault, so don't die.
 429    The precise value is the insn being output, to pass to error_for_asm.  */
 430 extern rtx this_is_asm_operands;
 431
 432 /* Carry information from ASM_DECLARE_OBJECT_NAME
 433    to ASM_FINISH_DECLARE_OBJECT.  */
 434 extern int size_directive_output;
 435 extern tree last_assemble_variable_decl;
 436
 437 enum in_section { no_section, in_text, in_unlikely_executed_text, in_data,
 438                  in_named
 439 #ifdef BSS_SECTION_ASM_OP
 440   , in_bss
 441 #endif
 442 #ifdef CTORS_SECTION_ASM_OP
 443   , in_ctors
 444 #endif
 445 #ifdef DTORS_SECTION_ASM_OP
 446   , in_dtors
 447 #endif
 448 #ifdef READONLY_DATA_SECTION_ASM_OP
 449   , in_readonly_data
 450 #endif
 451 #ifdef EXTRA_SECTIONS
 452   , EXTRA_SECTIONS
 453 #endif
 454 };
 455
 456 extern const char *last_text_section_name;
 457 extern enum in_section last_text_section;
 458 extern bool first_function_block_is_cold;
 459
 460 /* Decide whether DECL needs to be in a writable section.
 461    RELOC is the same as for SELECT_SECTION.  */
 462 extern bool decl_readonly_section (tree, int);
 463 extern bool decl_readonly_section_1 (tree, int, int);
 464
 465 /* This can be used to compute RELOC for the function above, when
 466    given a constant expression.  */
 467 extern int compute_reloc_for_constant (tree);
 468
 469 /* User label prefix in effect for this compilation.  */
 470 extern const char *user_label_prefix;
 471
 472 /* Default target function prologue and epilogue assembler output.  */
 473 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
 474
 475 /* Tell assembler to switch to the section for the exception table.  */
 476 extern void default_exception_section (void);
 477
 478 /* Tell assembler to switch to the section for the EH frames.  */
 479 extern void named_section_eh_frame_section (void);
 480 extern void collect2_eh_frame_section (void);
 481 extern void default_eh_frame_section (void);
 482
 483 /* Default target hook that outputs nothing to a stream.  */
 484 extern void no_asm_to_stream (FILE *);
 485
 486 /* Flags controlling properties of a section.  */
 487 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 488 #define SECTION_CODE     0x00100        /* contains code */
 489 #define SECTION_WRITE    0x00200        /* data is writable */
 490 #define SECTION_DEBUG    0x00400        /* contains debug data */
 491 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 492 #define SECTION_SMALL    0x01000        /* contains "small data" */
 493 #define SECTION_BSS      0x02000        /* contains zeros only */
 494 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 495 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 496 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 497                                            embedded zeros */
 498 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 499 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 500 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 501 #define SECTION_MACH_DEP 0x100000       /* subsequent bits reserved for target */
 502
 503 extern bool set_named_section_flags (const char *, unsigned int);
 504 #define named_section_flags(NAME, FLAGS) \
 505   named_section_real((NAME), (FLAGS), /*decl=*/NULL_TREE)
 506 extern void named_section_real (const char *, unsigned int, tree);
 507 extern bool named_section_first_declaration (const char *);
 508 extern unsigned int default_section_type_flags (tree, const char *, int);
 509 extern unsigned int default_section_type_flags_1 (tree, const char *, int, int);
 510
 511 extern void default_no_named_section (const char *, unsigned int, tree);
 512 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 513 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 514 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 515
 516 extern void default_stabs_asm_out_destructor (rtx, int);
 517 extern void default_named_section_asm_out_destructor (rtx, int);
 518 extern void default_dtor_section_asm_out_destructor (rtx, int);
 519 extern void default_stabs_asm_out_constructor (rtx, int);
 520 extern void default_named_section_asm_out_constructor (rtx, int);
 521 extern void default_ctor_section_asm_out_constructor (rtx, int);
 522
 523 extern void default_select_section (tree, int, unsigned HOST_WIDE_INT);
 524 extern void default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
 525 extern void default_elf_select_section_1 (tree, int,
 526                                           unsigned HOST_WIDE_INT, int);
 527 extern void default_unique_section (tree, int);
 528 extern void default_unique_section_1 (tree, int, int);
 529 extern void default_function_rodata_section (tree);
 530 extern void default_no_function_rodata_section (tree);
 531 extern void default_select_rtx_section (enum machine_mode, rtx,
 532                                         unsigned HOST_WIDE_INT);
 533 extern void default_elf_select_rtx_section (enum machine_mode, rtx,
 534                                             unsigned HOST_WIDE_INT);
 535 extern void default_encode_section_info (tree, rtx, int);
 536 extern const char *default_strip_name_encoding (const char *);
 537 extern bool default_binds_local_p (tree);
 538 extern bool default_binds_local_p_1 (tree, int);
 539 extern void default_globalize_label (FILE *, const char *);
 540 extern void default_emit_unwind_label (FILE *, tree, int, int);
 541 extern void default_internal_label (FILE *, const char *, unsigned long);
 542 extern void default_file_start (void);
 543 extern void file_end_indicate_exec_stack (void);
 544 extern bool default_valid_pointer_mode (enum machine_mode);
 545
 546 extern int default_address_cost (rtx);
 547
 548 /* When performing hot/cold basic block partitioning, insert note in
 549    instruction stream indicating boundary between hot and cold sections.  */
 550 extern void insert_section_boundary_note (void);
 551
 552 /* dbxout helper functions */
 553 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
 554
 555 extern void dbxout_int (int);
 556 extern void dbxout_stabd (int, int);
 557 extern void dbxout_begin_stabn (int);
 558 extern void dbxout_begin_stabn_sline (int);
 559 extern void dbxout_begin_empty_stabs (int);
 560 extern void dbxout_begin_simple_stabs (const char *, int);
 561 extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
 562
 563 extern void dbxout_stab_value_zero (void);
 564 extern void dbxout_stab_value_label (const char *);
 565 extern void dbxout_stab_value_label_diff (const char *, const char *);
 566 extern void dbxout_stab_value_internal_label (const char *, int *);
 567 extern void dbxout_stab_value_internal_label_diff (const char *, int *,
 568                                                    const char *);
 569
 570 #endif
 571
 572 #endif /* ! GCC_OUTPUT_H */