gcc/output.h

   1 /* Declarations for insn-output.c and other code to write to asm_out_file.
   2    These functions are defined in final.c, and varasm.c.
   3    Copyright (C) 1987-2014 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GCC_OUTPUT_H
  22 #define GCC_OUTPUT_H
  23
  24 /* Initialize data in final at the beginning of a compilation.  */
  25 extern void init_final (const char *);
  26
  27 /* Enable APP processing of subsequent output.
  28    Used before the output from an `asm' statement.  */
  29 extern void app_enable (void);
  30
  31 /* Disable APP processing of subsequent output.
  32    Called from varasm.c before most kinds of output.  */
  33 extern void app_disable (void);
  34
  35 /* Return the number of slots filled in the current
  36    delayed branch sequence (we don't count the insn needing the
  37    delay slot).   Zero if not in a delayed branch sequence.  */
  38 extern int dbr_sequence_length (void);
  39
  40 /* Indicate that branch shortening hasn't yet been done.  */
  41 extern void init_insn_lengths (void);
  42
  43 /* Obtain the current length of an insn.  If branch shortening has been done,
  44    get its actual length.  Otherwise, get its maximum length.  */
  45 extern int get_attr_length (rtx);
  46
  47 /* Obtain the current length of an insn.  If branch shortening has been done,
  48    get its actual length.  Otherwise, get its minimum length.  */
  49 extern int get_attr_min_length (rtx);
  50
  51 /* Make a pass over all insns and compute their actual lengths by shortening
  52    any branches of variable length if possible.  */
  53 extern void shorten_branches (rtx);
  54
  55 /* Output assembler code for the start of a function,
  56    and initialize some of the variables in this file
  57    for the new function.  The label for the function and associated
  58    assembler pseudo-ops have already been output in
  59    `assemble_start_function'.  */
  60 extern void final_start_function (rtx, FILE *, int);
  61
  62 /* Output assembler code for the end of a function.
  63    For clarity, args are same as those of `final_start_function'
  64    even though not all of them are needed.  */
  65 extern void final_end_function (void);
  66
  67 /* Output assembler code for some insns: all or part of a function.  */
  68 extern void final (rtx, FILE *, int);
  69
  70 /* The final scan for one insn, INSN.  Args are same as in `final', except
  71    that INSN is the insn being scanned.  Value returned is the next insn to
  72    be scanned.  */
  73 extern rtx final_scan_insn (rtx, FILE *, int, int, int *);
  74
  75 /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
  76    subreg of.  */
  77 extern rtx alter_subreg (rtx *, bool);
  78
  79 /* Print an operand using machine-dependent assembler syntax.  */
  80 extern void output_operand (rtx, int);
  81
  82 /* Report inconsistency between the assembler template and the operands.
  83    In an `asm', it's the user's fault; otherwise, the compiler's fault.  */
  84 extern void output_operand_lossage (const char *, ...) ATTRIBUTE_PRINTF_1;
  85
  86 /* Output a string of assembler code, substituting insn operands.
  87    Defined in final.c.  */
  88 extern void output_asm_insn (const char *, rtx *);
  89
  90 /* Compute a worst-case reference address of a branch so that it
  91    can be safely used in the presence of aligned labels.
  92    Defined in final.c.  */
  93 extern int insn_current_reference_address (rtx);
  94
  95 /* Find the alignment associated with a CODE_LABEL.
  96    Defined in final.c.  */
  97 extern int label_to_alignment (rtx);
  98
  99 /* Find the alignment maximum skip associated with a CODE_LABEL.
 100    Defined in final.c.  */
 101 extern int label_to_max_skip (rtx);
 102
 103 /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol.  */
 104 extern void output_asm_label (rtx);
 105
 106 /* Marks SYMBOL_REFs in x as referenced through use of assemble_external.  */
 107 extern void mark_symbol_refs_as_used (rtx);
 108
 109 /* Print a memory reference operand for address X
 110    using machine-dependent assembler syntax.  */
 111 extern void output_address (rtx);
 112
 113 /* Print an integer constant expression in assembler syntax.
 114    Addition and subtraction are the only arithmetic
 115    that may appear in these expressions.  */
 116 extern void output_addr_const (FILE *, rtx);
 117
 118 /* Output a string of assembler code, substituting numbers, strings
 119    and fixed syntactic prefixes.  */
 120 #if GCC_VERSION >= 3004
 121 #define ATTRIBUTE_ASM_FPRINTF(m, n) __attribute__ ((__format__ (__asm_fprintf__, m, n))) ATTRIBUTE_NONNULL(m)
 122 #else
 123 #define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
 124 #endif
 125
 126 extern void fprint_whex (FILE *, unsigned HOST_WIDE_INT);
 127 extern void fprint_ul (FILE *, unsigned long);
 128 extern int sprint_ul (char *, unsigned long);
 129
 130 extern void asm_fprintf (FILE *file, const char *p, ...)
 131      ATTRIBUTE_ASM_FPRINTF(2, 3);
 132
 133 /* Return nonzero if this function has no function calls.  */
 134 extern int leaf_function_p (void);
 135
 136 /* Return 1 if branch is a forward branch.
 137    Uses insn_shuid array, so it works only in the final pass.  May be used by
 138    output templates to add branch prediction hints, for example.  */
 139 extern int final_forward_branch_p (rtx);
 140
 141 /* Return 1 if this function uses only the registers that can be
 142    safely renumbered.  */
 143 extern int only_leaf_regs_used (void);
 144
 145 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
 146    available in leaf functions.  */
 147 extern void leaf_renumber_regs_insn (rtx);
 148
 149 /* Locate the proper template for the given insn-code.  */
 150 extern const char *get_insn_template (int, rtx);
 151
 152 /* Functions in varasm.c.  */
 153
 154 /* Emit any pending weak declarations.  */
 155 extern void weak_finish (void);
 156
 157 /* Decode an `asm' spec for a declaration as a register name.
 158    Return the register number, or -1 if nothing specified,
 159    or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
 160    or -3 if ASMSPEC is `cc' and is not recognized,
 161    or -4 if ASMSPEC is `memory' and is not recognized.
 162    Accept an exact spelling or a decimal number.
 163    Prefixes such as % are optional.  */
 164 extern int decode_reg_name (const char *);
 165
 166 /* Similar to decode_reg_name, but takes an extra parameter that is a
 167    pointer to the number of (internal) registers described by the
 168    external name.  */
 169 extern int decode_reg_name_and_count (const char *, int *);
 170
 171 extern void do_assemble_alias (tree, tree);
 172
 173 extern void default_assemble_visibility (tree, int);
 174
 175 /* Output a string of literal assembler code
 176    for an `asm' keyword used between functions.  */
 177 extern void assemble_asm (tree);
 178
 179 /* Output assembler code for the constant pool of a function and associated
 180    with defining the name of the function.  DECL describes the function.
 181    NAME is the function's name.  For the constant pool, we use the current
 182    constant pool data.  */
 183 extern void assemble_start_function (tree, const char *);
 184
 185 /* Output assembler code associated with defining the size of the
 186    function.  DECL describes the function.  NAME is the function's name.  */
 187 extern void assemble_end_function (tree, const char *);
 188
 189 /* Assemble everything that is needed for a variable or function declaration.
 190    Not used for automatic variables, and not used for function definitions.
 191    Should not be called for variables of incomplete structure type.
 192
 193    TOP_LEVEL is nonzero if this variable has file scope.
 194    AT_END is nonzero if this is the special handling, at end of compilation,
 195    to define things that have had only tentative definitions.
 196    DONT_OUTPUT_DATA if nonzero means don't actually output the
 197    initial value (that will be done by the caller).  */
 198 extern void assemble_variable (tree, int, int, int);
 199
 200 /* Put the vtable verification constructor initialization function
 201    into the preinit array.  */
 202 extern void assemble_vtv_preinit_initializer (tree);
 203
 204 /* Compute the alignment of variable specified by DECL.
 205    DONT_OUTPUT_DATA is from assemble_variable.  */
 206 extern void align_variable (tree decl, bool dont_output_data);
 207
 208 /* Queue for outputting something to declare an external symbol to the
 209    assembler.  (Most assemblers don't need this, so we normally output
 210    nothing.)  Do nothing if DECL is not external.  */
 211 extern void assemble_external (tree);
 212
 213 /* Assemble code to leave SIZE bytes of zeros.  */
 214 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 215
 216 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 217 extern void assemble_align (int);
 218
 219 /* Assemble a string constant with the specified C string as contents.  */
 220 extern void assemble_string (const char *, int);
 221
 222 /* Similar, for calling a library function FUN.  */
 223 extern void assemble_external_libcall (rtx);
 224
 225 /* Assemble a label named NAME.  */
 226 extern void assemble_label (FILE *, const char *);
 227
 228 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 229    starts with a *, the rest of NAME is output verbatim.  Otherwise
 230    NAME is transformed in a target-specific way (usually by the
 231    addition of an underscore).  */
 232 extern void assemble_name_raw (FILE *, const char *);
 233
 234 /* Like assemble_name_raw, but should be used when NAME might refer to
 235    an entity that is also represented as a tree (like a function or
 236    variable).  If NAME does refer to such an entity, that entity will
 237    be marked as referenced.  */
 238 extern void assemble_name (FILE *, const char *);
 239
 240 /* Return the assembler directive for creating a given kind of integer
 241    object.  SIZE is the number of bytes in the object and ALIGNED_P
 242    indicates whether it is known to be aligned.  Return NULL if the
 243    assembly dialect has no such directive.
 244
 245    The returned string should be printed at the start of a new line and
 246    be followed immediately by the object's initial value.  */
 247 extern const char *integer_asm_op (int, int);
 248
 249 /* Use directive OP to assemble an integer object X.  Print OP at the
 250    start of the line, followed immediately by the value of X.  */
 251 extern void assemble_integer_with_op (const char *, rtx);
 252
 253 /* The default implementation of the asm_out.integer target hook.  */
 254 extern bool default_assemble_integer (rtx, unsigned int, int);
 255
 256 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 257    the alignment of the integer in bits.  Return 1 if we were able to output
 258    the constant, otherwise 0.  If FORCE is nonzero the constant must
 259    be outputable. */
 260 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 261
 262 /* Return section for TEXT_SECITON_NAME if DECL or DECL_SECTION_NAME (DECL)
 263    is NULL.  */
 264 extern section *get_named_text_section (tree, const char *, const char *);
 265
 266 /* An interface to assemble_integer for the common case in which a value is
 267    fully aligned and must be printed.  VALUE is the value of the integer
 268    object and SIZE is the number of bytes it contains.  */
 269 #define assemble_aligned_integer(SIZE, VALUE) \
 270   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 271
 272 #ifdef REAL_VALUE_TYPE_SIZE
 273 /* Assemble the floating-point constant D into an object of size MODE.  */
 274 extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
 275 #endif
 276
 277 /* Write the address of the entity given by SYMBOL to SEC.  */
 278 extern void assemble_addr_to_section (rtx, section *);
 279
 280 /* Return the size of the constant pool.  */
 281 extern int get_pool_size (void);
 282
 283 #ifdef HAVE_peephole
 284 extern rtx peephole (rtx);
 285 #endif
 286
 287 extern void output_shared_constant_pool (void);
 288
 289 extern void output_object_blocks (void);
 290
 291 extern void output_quoted_string (FILE *, const char *);
 292
 293 /* When outputting delayed branch sequences, this rtx holds the
 294    sequence being output.  It is null when no delayed branch
 295    sequence is being output, so it can be used as a test in the
 296    insn output code.
 297
 298    This variable is defined  in final.c.  */
 299 extern rtx final_sequence;
 300
 301 /* The line number of the beginning of the current function.  Various
 302    md code needs this so that it can output relative linenumbers.  */
 303
 304 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 305 extern int sdb_begin_function_line;
 306 #endif
 307
 308 /* File in which assembler code is being written.  */
 309
 310 #ifdef BUFSIZ
 311 extern FILE *asm_out_file;
 312 #endif
 313
 314 /* The first global object in the file.  */
 315 extern const char *first_global_object_name;
 316
 317 /* The first weak object in the file.  */
 318 extern const char *weak_global_object_name;
 319
 320 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 321 extern rtx current_insn_predicate;
 322
 323 /* Last insn processed by final_scan_insn.  */
 324 extern rtx current_output_insn;
 325
 326 /* Nonzero while outputting an `asm' with operands.
 327    This means that inconsistencies are the user's fault, so don't die.
 328    The precise value is the insn being output, to pass to error_for_asm.  */
 329 extern rtx this_is_asm_operands;
 330
 331 /* Carry information from ASM_DECLARE_OBJECT_NAME
 332    to ASM_FINISH_DECLARE_OBJECT.  */
 333 extern int size_directive_output;
 334 extern tree last_assemble_variable_decl;
 335
 336 extern bool first_function_block_is_cold;
 337
 338 /* Decide whether DECL needs to be in a writable section.
 339    RELOC is the same as for SELECT_SECTION.  */
 340 extern bool decl_readonly_section (const_tree, int);
 341
 342 /* This can be used to compute RELOC for the function above, when
 343    given a constant expression.  */
 344 extern int compute_reloc_for_constant (tree);
 345
 346 /* User label prefix in effect for this compilation.  */
 347 extern const char *user_label_prefix;
 348
 349 /* Default target function prologue and epilogue assembler output.  */
 350 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
 351
 352 /* Default target function switched text sections.  */
 353 extern void default_function_switched_text_sections (FILE *, tree, bool);
 354
 355 /* Default target hook that outputs nothing to a stream.  */
 356 extern void no_asm_to_stream (FILE *);
 357
 358 /* Flags controlling properties of a section.  */
 359 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 360 #define SECTION_CODE     0x00100        /* contains code */
 361 #define SECTION_WRITE    0x00200        /* data is writable */
 362 #define SECTION_DEBUG    0x00400        /* contains debug data */
 363 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 364 #define SECTION_SMALL    0x01000        /* contains "small data" */
 365 #define SECTION_BSS      0x02000        /* contains zeros only */
 366 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 367 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 368 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 369                                            embedded zeros */
 370 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 371 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 372 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 373 #define SECTION_DECLARED 0x100000       /* section has been used */
 374 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 375 #define SECTION_COMMON   0x800000       /* contains common data */
 376 #define SECTION_RELRO    0x1000000      /* data is readonly after relocation processing */
 377 #define SECTION_EXCLUDE  0x2000000      /* discarded by the linker */
 378 #define SECTION_MACH_DEP 0x4000000      /* subsequent bits reserved for target */
 379
 380 /* This SECTION_STYLE is used for unnamed sections that we can switch
 381    to using a special assembler directive.  */
 382 #define SECTION_UNNAMED  0x000000
 383
 384 /* This SECTION_STYLE is used for named sections that we can switch
 385    to using a general section directive.  */
 386 #define SECTION_NAMED    0x200000
 387
 388 /* This SECTION_STYLE is used for sections that we cannot switch to at
 389    all.  The choice of section is implied by the directive that we use
 390    to declare the object.  */
 391 #define SECTION_NOSWITCH 0x400000
 392
 393 /* A helper function for default_elf_select_section and
 394    default_elf_unique_section.  Categorizes the DECL.  */
 395
 396 enum section_category
 397 {
 398   SECCAT_TEXT,
 399
 400   SECCAT_RODATA,
 401   SECCAT_RODATA_MERGE_STR,
 402   SECCAT_RODATA_MERGE_STR_INIT,
 403   SECCAT_RODATA_MERGE_CONST,
 404   SECCAT_SRODATA,
 405
 406   SECCAT_DATA,
 407
 408   /* To optimize loading of shared programs, define following subsections
 409      of data section:
 410         _REL    Contains data that has relocations, so they get grouped
 411                 together and dynamic linker will visit fewer pages in memory.
 412         _RO     Contains data that is otherwise read-only.  This is useful
 413                 with prelinking as most relocations won't be dynamically
 414                 linked and thus stay read only.
 415         _LOCAL  Marks data containing relocations only to local objects.
 416                 These relocations will get fully resolved by prelinking.  */
 417   SECCAT_DATA_REL,
 418   SECCAT_DATA_REL_LOCAL,
 419   SECCAT_DATA_REL_RO,
 420   SECCAT_DATA_REL_RO_LOCAL,
 421
 422   SECCAT_SDATA,
 423   SECCAT_TDATA,
 424
 425   SECCAT_BSS,
 426   SECCAT_SBSS,
 427   SECCAT_TBSS
 428 };
 429
 430 /* Information that is provided by all instances of the section type.  */
 431 struct GTY(()) section_common {
 432   /* The set of SECTION_* flags that apply to this section.  */
 433   unsigned int flags;
 434 };
 435
 436 /* Information about a SECTION_NAMED section.  */
 437 struct GTY(()) named_section {
 438   struct section_common common;
 439
 440   /* The name of the section.  */
 441   const char *name;
 442
 443   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 444      section is associated.  */
 445   tree decl;
 446 };
 447
 448 /* A callback that writes the assembly code for switching to an unnamed
 449    section.  The argument provides callback-specific data.  */
 450 typedef void (*unnamed_section_callback) (const void *);
 451
 452 /* Information about a SECTION_UNNAMED section.  */
 453 struct GTY(()) unnamed_section {
 454   struct section_common common;
 455
 456   /* The callback used to switch to the section, and the data that
 457      should be passed to the callback.  */
 458   unnamed_section_callback GTY ((skip)) callback;
 459   const void *GTY ((skip)) data;
 460
 461   /* The next entry in the chain of unnamed sections.  */
 462   section *next;
 463 };
 464
 465 /* A callback that writes the assembly code for a decl in a
 466    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 467    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 468    in bytes and ROUNDED is that size rounded up to the next
 469    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 470
 471    Return true if the callback used DECL_ALIGN to set the object's
 472    alignment.  A false return value implies that we are relying
 473    on the rounded size to align the decl.  */
 474 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 475                                            unsigned HOST_WIDE_INT size,
 476                                            unsigned HOST_WIDE_INT rounded);
 477
 478 /* Information about a SECTION_NOSWITCH section.  */
 479 struct GTY(()) noswitch_section {
 480   struct section_common common;
 481
 482   /* The callback used to assemble decls in this section.  */
 483   noswitch_section_callback GTY ((skip)) callback;
 484 };
 485
 486 /* Information about a section, which may be named or unnamed.  */
 487 union GTY ((desc ("SECTION_STYLE (&(%h))"))) section {
 488   struct section_common GTY ((skip)) common;
 489   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 490   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 491   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 492 };
 493
 494 /* Return the style of section SECT.  */
 495 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 496
 497 struct object_block;
 498
 499 /* Special well-known sections.  */
 500 extern GTY(()) section *text_section;
 501 extern GTY(()) section *data_section;
 502 extern GTY(()) section *readonly_data_section;
 503 extern GTY(()) section *sdata_section;
 504 extern GTY(()) section *ctors_section;
 505 extern GTY(()) section *dtors_section;
 506 extern GTY(()) section *bss_section;
 507 extern GTY(()) section *sbss_section;
 508 extern GTY(()) section *exception_section;
 509 extern GTY(()) section *eh_frame_section;
 510 extern GTY(()) section *tls_comm_section;
 511 extern GTY(()) section *comm_section;
 512 extern GTY(()) section *lcomm_section;
 513 extern GTY(()) section *bss_noswitch_section;
 514
 515 extern GTY(()) section *in_section;
 516 extern GTY(()) bool in_cold_section_p;
 517
 518 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 519                                      const void *);
 520 extern section *get_section (const char *, unsigned int, tree);
 521 extern section *get_named_section (tree, const char *, int);
 522 extern section *get_variable_section (tree, bool);
 523 extern void place_block_symbol (rtx);
 524 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 525                                enum tls_model);
 526 extern section *mergeable_constant_section (enum machine_mode,
 527                                             unsigned HOST_WIDE_INT,
 528                                             unsigned int);
 529 extern section *function_section (tree);
 530 extern section *unlikely_text_section (void);
 531 extern section *current_function_section (void);
 532
 533 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
 534    not) section for PRIORITY.  */
 535 extern section *get_cdtor_priority_section (int, bool);
 536
 537 extern bool unlikely_text_section_p (section *);
 538 extern void switch_to_section (section *);
 539 extern void output_section_asm_op (const void *);
 540
 541 extern void record_tm_clone_pair (tree, tree);
 542 extern void finish_tm_clone_pairs (void);
 543 extern tree get_tm_clone_pair (tree);
 544
 545 extern void default_asm_output_source_filename (FILE *, const char *);
 546 extern void output_file_directive (FILE *, const char *);
 547
 548 extern unsigned int default_section_type_flags (tree, const char *, int);
 549
 550 extern bool have_global_bss_p (void);
 551 extern bool bss_initializer_p (const_tree);
 552
 553 extern void default_no_named_section (const char *, unsigned int, tree);
 554 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 555 extern enum section_category categorize_decl_for_section (const_tree, int);
 556 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 557 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 558
 559 extern void default_named_section_asm_out_destructor (rtx, int);
 560 extern void default_dtor_section_asm_out_destructor (rtx, int);
 561 extern void default_named_section_asm_out_constructor (rtx, int);
 562 extern void default_ctor_section_asm_out_constructor (rtx, int);
 563
 564 extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
 565 extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
 566 extern void default_unique_section (tree, int);
 567 extern section *default_function_rodata_section (tree);
 568 extern section *default_no_function_rodata_section (tree);
 569 extern section *default_clone_table_section (void);
 570 extern section *default_select_rtx_section (enum machine_mode, rtx,
 571                                             unsigned HOST_WIDE_INT);
 572 extern section *default_elf_select_rtx_section (enum machine_mode, rtx,
 573                                                 unsigned HOST_WIDE_INT);
 574 extern void default_encode_section_info (tree, rtx, int);
 575 extern const char *default_strip_name_encoding (const char *);
 576 extern void default_asm_output_anchor (rtx);
 577 extern bool default_use_anchors_for_symbol_p (const_rtx);
 578 extern bool default_binds_local_p (const_tree);
 579 extern bool default_binds_local_p_1 (const_tree, int);
 580 extern void default_globalize_label (FILE *, const char *);
 581 extern void default_globalize_decl_name (FILE *, tree);
 582 extern void default_emit_unwind_label (FILE *, tree, int, int);
 583 extern void default_emit_except_table_label (FILE *);
 584 extern void default_generate_internal_label (char *, const char *,
 585                                              unsigned long);
 586 extern void default_internal_label (FILE *, const char *, unsigned long);
 587 extern void default_asm_declare_constant_name (FILE *, const char *,
 588                                                const_tree, HOST_WIDE_INT);
 589 extern void default_file_start (void);
 590 extern void file_end_indicate_exec_stack (void);
 591 extern void file_end_indicate_split_stack (void);
 592
 593 extern void default_elf_asm_output_external (FILE *file, tree,
 594                                              const char *);
 595 extern void default_elf_asm_output_limited_string (FILE *, const char *);
 596 extern void default_elf_asm_output_ascii (FILE *, const char *, unsigned int);
 597 extern void default_elf_internal_label (FILE *, const char *, unsigned long);
 598
 599 extern void default_elf_init_array_asm_out_constructor (rtx, int);
 600 extern void default_elf_fini_array_asm_out_destructor (rtx, int);
 601 extern int maybe_assemble_visibility (tree);
 602
 603 extern int default_address_cost (rtx, enum machine_mode, addr_space_t, bool);
 604
 605 /* Output stack usage information.  */
 606 extern void output_stack_usage (void);
 607
 608 #endif /* ! GCC_OUTPUT_H */