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, 2007
   5    Free Software Foundation, Inc.
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 3, or (at your option) any later
  12 version.
  13
  14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING3.  If not see
  21 <http://www.gnu.org/licenses/>.  */
  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 extern void assemble_alias (tree, tree);
 171
 172 extern void default_assemble_visibility (tree, int);
 173
 174 /* Output a string of literal assembler code
 175    for an `asm' keyword used between functions.  */
 176 extern void assemble_asm (tree);
 177
 178 /* Output assembler code for the constant pool of a function and associated
 179    with defining the name of the function.  DECL describes the function.
 180    NAME is the function's name.  For the constant pool, we use the current
 181    constant pool data.  */
 182 extern void assemble_start_function (tree, const char *);
 183
 184 /* Output assembler code associated with defining the size of the
 185    function.  DECL describes the function.  NAME is the function's name.  */
 186 extern void assemble_end_function (tree, const char *);
 187
 188 /* Assemble everything that is needed for a variable or function declaration.
 189    Not used for automatic variables, and not used for function definitions.
 190    Should not be called for variables of incomplete structure type.
 191
 192    TOP_LEVEL is nonzero if this variable has file scope.
 193    AT_END is nonzero if this is the special handling, at end of compilation,
 194    to define things that have had only tentative definitions.
 195    DONT_OUTPUT_DATA if nonzero means don't actually output the
 196    initial value (that will be done by the caller).  */
 197 extern void assemble_variable (tree, int, int, int);
 198
 199 /* Compute the alignment of variable specified by DECL.
 200    DONT_OUTPUT_DATA is from assemble_variable.  */
 201 extern void align_variable (tree decl, bool dont_output_data);
 202
 203 /* Output something to declare an external symbol to the assembler.
 204    (Most assemblers don't need this, so we normally output nothing.)
 205    Do nothing if DECL is not external.  */
 206 extern void assemble_external (tree);
 207
 208 /* Assemble code to leave SIZE bytes of zeros.  */
 209 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 210
 211 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 212 extern void assemble_align (int);
 213
 214 /* Assemble a string constant with the specified C string as contents.  */
 215 extern void assemble_string (const char *, int);
 216
 217 /* Similar, for calling a library function FUN.  */
 218 extern void assemble_external_libcall (rtx);
 219
 220 /* Assemble a label named NAME.  */
 221 extern void assemble_label (const char *);
 222
 223 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 224    starts with a *, the rest of NAME is output verbatim.  Otherwise
 225    NAME is transformed in a target-specific way (usually by the
 226    addition of an underscore).  */
 227 extern void assemble_name_raw (FILE *, const char *);
 228
 229 /* Like assemble_name_raw, but should be used when NAME might refer to
 230    an entity that is also represented as a tree (like a function or
 231    variable).  If NAME does refer to such an entity, that entity will
 232    be marked as referenced.  */
 233 extern void assemble_name (FILE *, const char *);
 234
 235 /* Return the assembler directive for creating a given kind of integer
 236    object.  SIZE is the number of bytes in the object and ALIGNED_P
 237    indicates whether it is known to be aligned.  Return NULL if the
 238    assembly dialect has no such directive.
 239
 240    The returned string should be printed at the start of a new line and
 241    be followed immediately by the object's initial value.  */
 242 extern const char *integer_asm_op (int, int);
 243
 244 /* Use directive OP to assemble an integer object X.  Print OP at the
 245    start of the line, followed immediately by the value of X.  */
 246 extern void assemble_integer_with_op (const char *, rtx);
 247
 248 /* The default implementation of the asm_out.integer target hook.  */
 249 extern bool default_assemble_integer (rtx, unsigned int, int);
 250
 251 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 252    the alignment of the integer in bits.  Return 1 if we were able to output
 253    the constant, otherwise 0.  If FORCE is nonzero the constant must
 254    be outputable. */
 255 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 256
 257 /* An interface to assemble_integer for the common case in which a value is
 258    fully aligned and must be printed.  VALUE is the value of the integer
 259    object and SIZE is the number of bytes it contains.  */
 260 #define assemble_aligned_integer(SIZE, VALUE) \
 261   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 262
 263 #ifdef REAL_VALUE_TYPE_SIZE
 264 /* Assemble the floating-point constant D into an object of size MODE.  */
 265 extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
 266 #endif
 267
 268 /* Return the size of the constant pool.  */
 269 extern int get_pool_size (void);
 270
 271 #ifdef HAVE_peephole
 272 extern rtx peephole (rtx);
 273 #endif
 274
 275 extern void output_shared_constant_pool (void);
 276
 277 extern void output_object_blocks (void);
 278
 279 /* Whether a constructor CTOR is a valid static constant initializer if all
 280    its elements are.  This used to be internal to initializer_constant_valid_p
 281    and has been exposed to let other functions like categorize_ctor_elements
 282    evaluate the property while walking a constructor for other purposes.  */
 283
 284 extern bool constructor_static_from_elts_p (tree);
 285
 286 /* Return nonzero if VALUE is a valid constant-valued expression
 287    for use in initializing a static variable; one that can be an
 288    element of a "constant" initializer.
 289
 290    Return null_pointer_node if the value is absolute;
 291    if it is relocatable, return the variable that determines the relocation.
 292    We assume that VALUE has been folded as much as possible;
 293    therefore, we do not need to check for such things as
 294    arithmetic-combinations of integers.  */
 295 extern tree initializer_constant_valid_p (tree, tree);
 296
 297 /* Output assembler code for constant EXP to FILE, with no label.
 298    This includes the pseudo-op such as ".int" or ".byte", and a newline.
 299    Assumes output_addressed_constants has been done on EXP already.
 300
 301    Generate exactly SIZE bytes of assembler data, padding at the end
 302    with zeros if necessary.  SIZE must always be specified.
 303
 304    ALIGN is the alignment in bits that may be assumed for the data.  */
 305 extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
 306
 307 /* When outputting delayed branch sequences, this rtx holds the
 308    sequence being output.  It is null when no delayed branch
 309    sequence is being output, so it can be used as a test in the
 310    insn output code.
 311
 312    This variable is defined  in final.c.  */
 313 extern rtx final_sequence;
 314
 315 /* The line number of the beginning of the current function.  Various
 316    md code needs this so that it can output relative linenumbers.  */
 317
 318 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 319 extern int sdb_begin_function_line;
 320 #endif
 321
 322 /* File in which assembler code is being written.  */
 323
 324 #ifdef BUFSIZ
 325 extern FILE *asm_out_file;
 326 #endif
 327
 328 /* The first global object in the file.  */
 329 extern const char *first_global_object_name;
 330
 331 /* The first weak object in the file.  */
 332 extern const char *weak_global_object_name;
 333
 334 /* Nonzero if function being compiled doesn't contain any calls
 335    (ignoring the prologue and epilogue).  This is set prior to
 336    local register allocation and is valid for the remaining
 337    compiler passes.  */
 338
 339 extern int current_function_is_leaf;
 340
 341 /* Nonzero if function being compiled doesn't modify the stack pointer
 342    (ignoring the prologue and epilogue).  This is only valid after
 343    life_analysis has run.  */
 344
 345 extern int current_function_sp_is_unchanging;
 346
 347 /* Nonzero if the function being compiled is a leaf function which only
 348    uses leaf registers.  This is valid after reload (specifically after
 349    sched2) and is useful only if the port defines LEAF_REGISTERS.  */
 350
 351 extern int current_function_uses_only_leaf_regs;
 352
 353 /* Default file in which to dump debug output.  */
 354
 355 #ifdef BUFSIZ
 356 extern FILE *dump_file;
 357 #endif
 358
 359 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 360 extern rtx current_insn_predicate;
 361
 362 /* Last insn processed by final_scan_insn.  */
 363 extern rtx current_output_insn;
 364
 365 /* Nonzero while outputting an `asm' with operands.
 366    This means that inconsistencies are the user's fault, so don't die.
 367    The precise value is the insn being output, to pass to error_for_asm.  */
 368 extern rtx this_is_asm_operands;
 369
 370 /* Carry information from ASM_DECLARE_OBJECT_NAME
 371    to ASM_FINISH_DECLARE_OBJECT.  */
 372 extern int size_directive_output;
 373 extern tree last_assemble_variable_decl;
 374
 375 extern bool first_function_block_is_cold;
 376
 377 /* Decide whether DECL needs to be in a writable section.
 378    RELOC is the same as for SELECT_SECTION.  */
 379 extern bool decl_readonly_section (tree, int);
 380
 381 /* This can be used to compute RELOC for the function above, when
 382    given a constant expression.  */
 383 extern int compute_reloc_for_constant (tree);
 384
 385 /* User label prefix in effect for this compilation.  */
 386 extern const char *user_label_prefix;
 387
 388 /* Default target function prologue and epilogue assembler output.  */
 389 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
 390
 391 /* Default target hook that outputs nothing to a stream.  */
 392 extern void no_asm_to_stream (FILE *);
 393
 394 /* Flags controlling properties of a section.  */
 395 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 396 #define SECTION_CODE     0x00100        /* contains code */
 397 #define SECTION_WRITE    0x00200        /* data is writable */
 398 #define SECTION_DEBUG    0x00400        /* contains debug data */
 399 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 400 #define SECTION_SMALL    0x01000        /* contains "small data" */
 401 #define SECTION_BSS      0x02000        /* contains zeros only */
 402 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 403 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 404 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 405                                            embedded zeros */
 406 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 407 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 408 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 409 #define SECTION_DECLARED 0x100000       /* section has been used */
 410 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 411 #define SECTION_COMMON   0x800000       /* contains common data */
 412 #define SECTION_MACH_DEP 0x1000000      /* subsequent bits reserved for target */
 413
 414 /* This SECTION_STYLE is used for unnamed sections that we can switch
 415    to using a special assembler directive.  */
 416 #define SECTION_UNNAMED  0x000000
 417
 418 /* This SECTION_STYLE is used for named sections that we can switch
 419    to using a general section directive.  */
 420 #define SECTION_NAMED    0x200000
 421
 422 /* This SECTION_STYLE is used for sections that we cannot switch to at
 423    all.  The choice of section is implied by the directive that we use
 424    to declare the object.  */
 425 #define SECTION_NOSWITCH 0x400000
 426
 427 /* A helper function for default_elf_select_section and
 428    default_elf_unique_section.  Categorizes the DECL.  */
 429
 430 enum section_category
 431 {
 432   SECCAT_TEXT,
 433
 434   SECCAT_RODATA,
 435   SECCAT_RODATA_MERGE_STR,
 436   SECCAT_RODATA_MERGE_STR_INIT,
 437   SECCAT_RODATA_MERGE_CONST,
 438   SECCAT_SRODATA,
 439
 440   SECCAT_DATA,
 441
 442   /* To optimize loading of shared programs, define following subsections
 443      of data section:
 444         _REL    Contains data that has relocations, so they get grouped
 445                 together and dynamic linker will visit fewer pages in memory.
 446         _RO     Contains data that is otherwise read-only.  This is useful
 447                 with prelinking as most relocations won't be dynamically
 448                 linked and thus stay read only.
 449         _LOCAL  Marks data containing relocations only to local objects.
 450                 These relocations will get fully resolved by prelinking.  */
 451   SECCAT_DATA_REL,
 452   SECCAT_DATA_REL_LOCAL,
 453   SECCAT_DATA_REL_RO,
 454   SECCAT_DATA_REL_RO_LOCAL,
 455
 456   SECCAT_SDATA,
 457   SECCAT_TDATA,
 458
 459   SECCAT_BSS,
 460   SECCAT_SBSS,
 461   SECCAT_TBSS
 462 };
 463
 464 /* Information that is provided by all instances of the section type.  */
 465 struct section_common GTY(()) {
 466   /* The set of SECTION_* flags that apply to this section.  */
 467   unsigned int flags;
 468 };
 469
 470 /* Information about a SECTION_NAMED section.  */
 471 struct named_section GTY(()) {
 472   struct section_common common;
 473
 474   /* The name of the section.  */
 475   const char *name;
 476
 477   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 478      section is associated.  */
 479   tree decl;
 480 };
 481
 482 /* A callback that writes the assembly code for switching to an unnamed
 483    section.  The argument provides callback-specific data.  */
 484 typedef void (*unnamed_section_callback) (const void *);
 485
 486 /* Information about a SECTION_UNNAMED section.  */
 487 struct unnamed_section GTY(()) {
 488   struct section_common common;
 489
 490   /* The callback used to switch to the section, and the data that
 491      should be passed to the callback.  */
 492   unnamed_section_callback GTY ((skip)) callback;
 493   const void *GTY ((skip)) data;
 494
 495   /* The next entry in the chain of unnamed sections.  */
 496   section *next;
 497 };
 498
 499 /* A callback that writes the assembly code for a decl in a
 500    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 501    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 502    in bytes and ROUNDED is that size rounded up to the next
 503    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 504
 505    Return true if the callback used DECL_ALIGN to set the object's
 506    alignment.  A false return value implies that we are relying
 507    on the rounded size to align the decl.  */
 508 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 509                                            unsigned HOST_WIDE_INT size,
 510                                            unsigned HOST_WIDE_INT rounded);
 511
 512 /* Information about a SECTION_NOSWITCH section.  */
 513 struct noswitch_section GTY(()) {
 514   struct section_common common;
 515
 516   /* The callback used to assemble decls in this section.  */
 517   noswitch_section_callback GTY ((skip)) callback;
 518 };
 519
 520 /* Information about a section, which may be named or unnamed.  */
 521 union section GTY ((desc ("SECTION_STYLE (&(%h))")))
 522 {
 523   struct section_common GTY ((skip)) common;
 524   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 525   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 526   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 527 };
 528
 529 /* Return the style of section SECT.  */
 530 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 531
 532 struct object_block;
 533
 534 /* Special well-known sections.  */
 535 extern GTY(()) section *text_section;
 536 extern GTY(()) section *data_section;
 537 extern GTY(()) section *readonly_data_section;
 538 extern GTY(()) section *sdata_section;
 539 extern GTY(()) section *ctors_section;
 540 extern GTY(()) section *dtors_section;
 541 extern GTY(()) section *bss_section;
 542 extern GTY(()) section *sbss_section;
 543 extern GTY(()) section *exception_section;
 544 extern GTY(()) section *eh_frame_section;
 545 extern GTY(()) section *tls_comm_section;
 546 extern GTY(()) section *comm_section;
 547 extern GTY(()) section *lcomm_section;
 548 extern GTY(()) section *bss_noswitch_section;
 549
 550 extern GTY(()) section *in_section;
 551 extern GTY(()) bool in_cold_section_p;
 552
 553 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 554                                      const void *);
 555 extern section *get_section (const char *, unsigned int, tree);
 556 extern section *get_named_section (tree, const char *, int);
 557 extern void place_block_symbol (rtx);
 558 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 559                                enum tls_model);
 560 extern section *mergeable_constant_section (enum machine_mode,
 561                                             unsigned HOST_WIDE_INT,
 562                                             unsigned int);
 563 extern section *function_section (tree);
 564 extern section *unlikely_text_section (void);
 565 extern section *current_function_section (void);
 566
 567 extern bool unlikely_text_section_p (section *);
 568 extern void switch_to_section (section *);
 569 extern void output_section_asm_op (const void *);
 570
 571 extern unsigned int default_section_type_flags (tree, const char *, int);
 572
 573 extern bool have_global_bss_p (void);
 574 extern void default_no_named_section (const char *, unsigned int, tree);
 575 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 576 extern enum section_category categorize_decl_for_section (tree, int);
 577 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 578 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 579
 580 extern void default_stabs_asm_out_destructor (rtx, int);
 581 extern void default_named_section_asm_out_destructor (rtx, int);
 582 extern void default_dtor_section_asm_out_destructor (rtx, int);
 583 extern void default_stabs_asm_out_constructor (rtx, int);
 584 extern void default_named_section_asm_out_constructor (rtx, int);
 585 extern void default_ctor_section_asm_out_constructor (rtx, int);
 586
 587 extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
 588 extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
 589 extern void default_unique_section (tree, int);
 590 extern section *default_function_rodata_section (tree);
 591 extern section *default_no_function_rodata_section (tree);
 592 extern section *default_select_rtx_section (enum machine_mode, rtx,
 593                                             unsigned HOST_WIDE_INT);
 594 extern section *default_elf_select_rtx_section (enum machine_mode, rtx,
 595                                                 unsigned HOST_WIDE_INT);
 596 extern void default_encode_section_info (tree, rtx, int);
 597 extern const char *default_strip_name_encoding (const char *);
 598 extern void default_asm_output_anchor (rtx);
 599 extern bool default_use_anchors_for_symbol_p (rtx);
 600 extern bool default_binds_local_p (tree);
 601 extern bool default_binds_local_p_1 (tree, int);
 602 extern void default_globalize_label (FILE *, const char *);
 603 extern void default_emit_unwind_label (FILE *, tree, int, int);
 604 extern void default_emit_except_table_label (FILE *);
 605 extern void default_internal_label (FILE *, const char *, unsigned long);
 606 extern void default_file_start (void);
 607 extern void file_end_indicate_exec_stack (void);
 608 extern bool default_valid_pointer_mode (enum machine_mode);
 609
 610 extern int default_address_cost (rtx);
 611
 612 /* dbxout helper functions */
 613 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
 614
 615 extern void dbxout_int (int);
 616 extern void dbxout_stabd (int, int);
 617 extern void dbxout_begin_stabn (int);
 618 extern void dbxout_begin_stabn_sline (int);
 619 extern void dbxout_begin_empty_stabs (int);
 620 extern void dbxout_begin_simple_stabs (const char *, int);
 621 extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
 622
 623 extern void dbxout_stab_value_zero (void);
 624 extern void dbxout_stab_value_label (const char *);
 625 extern void dbxout_stab_value_label_diff (const char *, const char *);
 626 extern void dbxout_stab_value_internal_label (const char *, int *);
 627 extern void dbxout_stab_value_internal_label_diff (const char *, int *,
 628                                                    const char *);
 629
 630 #endif
 631
 632 #endif /* ! GCC_OUTPUT_H */