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) 1987-2018 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_insn *);
  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_insn *);
  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_insn *);
  54
  55 const char *get_some_local_dynamic_name ();
  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_insn *, 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_insn *, 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_insn *final_scan_insn (rtx_insn *, 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 *, bool);
  80
  81 /* Print an operand using machine-dependent assembler syntax.  */
  82 extern void output_operand (rtx, int);
  83
  84 /* Report inconsistency between the assembler template and the operands.
  85    In an `asm', it's the user's fault; otherwise, the compiler's fault.  */
  86 extern void output_operand_lossage (const char *, ...) ATTRIBUTE_PRINTF_1;
  87
  88 /* Output a string of assembler code, substituting insn operands.
  89    Defined in final.c.  */
  90 extern void output_asm_insn (const char *, rtx *);
  91
  92 /* Compute a worst-case reference address of a branch so that it
  93    can be safely used in the presence of aligned labels.
  94    Defined in final.c.  */
  95 extern int insn_current_reference_address (rtx_insn *);
  96
  97 /* Find the alignment associated with a CODE_LABEL.
  98    Defined in final.c.  */
  99 extern int label_to_alignment (rtx);
 100
 101 /* Find the alignment maximum skip associated with a CODE_LABEL.
 102    Defined in final.c.  */
 103 extern int label_to_max_skip (rtx);
 104
 105 /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol.  */
 106 extern void output_asm_label (rtx);
 107
 108 /* Marks SYMBOL_REFs in x as referenced through use of assemble_external.  */
 109 extern void mark_symbol_refs_as_used (rtx);
 110
 111 /* Print a memory reference operand for address X with access mode MODE
 112    using machine-dependent assembler syntax.  */
 113 extern void output_address (machine_mode, rtx);
 114
 115 /* Print an integer constant expression in assembler syntax.
 116    Addition and subtraction are the only arithmetic
 117    that may appear in these expressions.  */
 118 extern void output_addr_const (FILE *, rtx);
 119
 120 /* Output a string of assembler code, substituting numbers, strings
 121    and fixed syntactic prefixes.  */
 122 #if GCC_VERSION >= 3004
 123 #define ATTRIBUTE_ASM_FPRINTF(m, n) __attribute__ ((__format__ (__asm_fprintf__, m, n))) ATTRIBUTE_NONNULL(m)
 124 #else
 125 #define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
 126 #endif
 127
 128 extern void fprint_whex (FILE *, unsigned HOST_WIDE_INT);
 129 extern void fprint_ul (FILE *, unsigned long);
 130 extern int sprint_ul (char *, unsigned long);
 131
 132 extern void asm_fprintf (FILE *file, const char *p, ...)
 133      ATTRIBUTE_ASM_FPRINTF(2, 3);
 134
 135 /* Return nonzero if this function has no function calls.  */
 136 extern int leaf_function_p (void);
 137
 138 /* Return 1 if branch is a forward branch.
 139    Uses insn_shuid array, so it works only in the final pass.  May be used by
 140    output templates to add branch prediction hints, for example.  */
 141 extern int final_forward_branch_p (rtx_insn *);
 142
 143 /* Return 1 if this function uses only the registers that can be
 144    safely renumbered.  */
 145 extern int only_leaf_regs_used (void);
 146
 147 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
 148    available in leaf functions.  */
 149 extern void leaf_renumber_regs_insn (rtx);
 150
 151 /* Locate the proper template for the given insn-code.  */
 152 extern const char *get_insn_template (int, rtx);
 153
 154 /* Functions in varasm.c.  */
 155
 156 /* Emit any pending weak declarations.  */
 157 extern void weak_finish (void);
 158
 159 /* Decode an `asm' spec for a declaration as a register name.
 160    Return the register number, or -1 if nothing specified,
 161    or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
 162    or -3 if ASMSPEC is `cc' and is not recognized,
 163    or -4 if ASMSPEC is `memory' and is not recognized.
 164    Accept an exact spelling or a decimal number.
 165    Prefixes such as % are optional.  */
 166 extern int decode_reg_name (const char *);
 167
 168 /* Similar to decode_reg_name, but takes an extra parameter that is a
 169    pointer to the number of (internal) registers described by the
 170    external name.  */
 171 extern int decode_reg_name_and_count (const char *, int *);
 172
 173 extern void do_assemble_alias (tree, tree);
 174
 175 extern void default_assemble_visibility (tree, int);
 176
 177 /* Output a string of literal assembler code
 178    for an `asm' keyword used between functions.  */
 179 extern void assemble_asm (tree);
 180
 181 /* Get the function's name from a decl, as described by its RTL.  */
 182 extern const char *get_fnname_from_decl (tree);
 183
 184 /* Output assembler code for the constant pool of a function and associated
 185    with defining the name of the function.  DECL describes the function.
 186    NAME is the function's name.  For the constant pool, we use the current
 187    constant pool data.  */
 188 extern void assemble_start_function (tree, const char *);
 189
 190 /* Output assembler code associated with defining the size of the
 191    function.  DECL describes the function.  NAME is the function's name.  */
 192 extern void assemble_end_function (tree, const char *);
 193
 194 /* Assemble everything that is needed for a variable or function declaration.
 195    Not used for automatic variables, and not used for function definitions.
 196    Should not be called for variables of incomplete structure type.
 197
 198    TOP_LEVEL is nonzero if this variable has file scope.
 199    AT_END is nonzero if this is the special handling, at end of compilation,
 200    to define things that have had only tentative definitions.
 201    DONT_OUTPUT_DATA if nonzero means don't actually output the
 202    initial value (that will be done by the caller).  */
 203 extern void assemble_variable (tree, int, int, int);
 204
 205 /* Put the vtable verification constructor initialization function
 206    into the preinit array.  */
 207 extern void assemble_vtv_preinit_initializer (tree);
 208
 209 /* Assemble everything that is needed for a variable declaration that has
 210    no definition in the current translation unit.  */
 211 extern void assemble_undefined_decl (tree);
 212
 213 /* Compute the alignment of variable specified by DECL.
 214    DONT_OUTPUT_DATA is from assemble_variable.  */
 215 extern void align_variable (tree decl, bool dont_output_data);
 216
 217 /* Queue for outputting something to declare an external symbol to the
 218    assembler.  (Most assemblers don't need this, so we normally output
 219    nothing.)  Do nothing if DECL is not external.  */
 220 extern void assemble_external (tree);
 221
 222 /* Assemble code to leave SIZE bytes of zeros.  */
 223 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 224
 225 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 226 extern void assemble_align (int);
 227
 228 /* Assemble a string constant with the specified C string as contents.  */
 229 extern void assemble_string (const char *, int);
 230
 231 /* Similar, for calling a library function FUN.  */
 232 extern void assemble_external_libcall (rtx);
 233
 234 /* Assemble a label named NAME.  */
 235 extern void assemble_label (FILE *, const char *);
 236
 237 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 238    starts with a *, the rest of NAME is output verbatim.  Otherwise
 239    NAME is transformed in a target-specific way (usually by the
 240    addition of an underscore).  */
 241 extern void assemble_name_raw (FILE *, const char *);
 242
 243 /* Like assemble_name_raw, but should be used when NAME might refer to
 244    an entity that is also represented as a tree (like a function or
 245    variable).  If NAME does refer to such an entity, that entity will
 246    be marked as referenced.  */
 247 extern void assemble_name (FILE *, const char *);
 248
 249 /* Return the assembler directive for creating a given kind of integer
 250    object.  SIZE is the number of bytes in the object and ALIGNED_P
 251    indicates whether it is known to be aligned.  Return NULL if the
 252    assembly dialect has no such directive.
 253
 254    The returned string should be printed at the start of a new line and
 255    be followed immediately by the object's initial value.  */
 256 extern const char *integer_asm_op (int, int);
 257
 258 /* Use directive OP to assemble an integer object X.  Print OP at the
 259    start of the line, followed immediately by the value of X.  */
 260 extern void assemble_integer_with_op (const char *, rtx);
 261
 262 /* The default implementation of the asm_out.integer target hook.  */
 263 extern bool default_assemble_integer (rtx, unsigned int, int);
 264
 265 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 266    the alignment of the integer in bits.  Return 1 if we were able to output
 267    the constant, otherwise 0.  If FORCE is nonzero the constant must
 268    be outputable. */
 269 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 270
 271 /* Return section for TEXT_SECITON_NAME if DECL or DECL_SECTION_NAME (DECL)
 272    is NULL.  */
 273 extern section *get_named_text_section (tree, const char *, const char *);
 274
 275 /* An interface to assemble_integer for the common case in which a value is
 276    fully aligned and must be printed.  VALUE is the value of the integer
 277    object and SIZE is the number of bytes it contains.  */
 278 #define assemble_aligned_integer(SIZE, VALUE) \
 279   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 280
 281 /* Assemble the floating-point constant D into an object of size MODE.  ALIGN
 282    is the alignment of the constant in bits.  If REVERSE is true, D is output
 283    in reverse storage order.  */
 284 extern void assemble_real (REAL_VALUE_TYPE, scalar_float_mode, unsigned,
 285                            bool = false);
 286
 287 /* Write the address of the entity given by SYMBOL to SEC.  */
 288 extern void assemble_addr_to_section (rtx, section *);
 289
 290 /* Return TRUE if and only if the constant pool has no entries.  Note
 291    that even entries we might end up choosing not to emit are counted
 292    here, so there is the potential for missed optimizations.  */
 293 extern bool constant_pool_empty_p (void);
 294
 295 extern rtx_insn *peephole (rtx_insn *);
 296
 297 extern void output_shared_constant_pool (void);
 298
 299 extern void output_object_blocks (void);
 300
 301 extern void output_quoted_string (FILE *, const char *);
 302
 303 /* When outputting delayed branch sequences, this rtx holds the
 304    sequence being output.  It is null when no delayed branch
 305    sequence is being output, so it can be used as a test in the
 306    insn output code.
 307
 308    This variable is defined  in final.c.  */
 309 extern rtx_sequence *final_sequence;
 310
 311 /* File in which assembler code is being written.  */
 312
 313 #ifdef BUFSIZ
 314 extern FILE *asm_out_file;
 315 #endif
 316
 317 /* The first global object in the file.  */
 318 extern const char *first_global_object_name;
 319
 320 /* The first weak object in the file.  */
 321 extern const char *weak_global_object_name;
 322
 323 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 324 extern rtx current_insn_predicate;
 325
 326 /* Last insn processed by final_scan_insn.  */
 327 extern rtx_insn *current_output_insn;
 328
 329 /* Nonzero while outputting an `asm' with operands.
 330    This means that inconsistencies are the user's fault, so don't die.
 331    The precise value is the insn being output, to pass to error_for_asm.  */
 332 extern const rtx_insn *this_is_asm_operands;
 333
 334 /* Carry information from ASM_DECLARE_OBJECT_NAME
 335    to ASM_FINISH_DECLARE_OBJECT.  */
 336 extern int size_directive_output;
 337 extern tree last_assemble_variable_decl;
 338
 339 extern bool first_function_block_is_cold;
 340
 341 /* Decide whether DECL needs to be in a writable section.
 342    RELOC is the same as for SELECT_SECTION.  */
 343 extern bool decl_readonly_section (const_tree, int);
 344
 345 /* This can be used to compute RELOC for the function above, when
 346    given a constant expression.  */
 347 extern int compute_reloc_for_constant (tree);
 348
 349 /* User label prefix in effect for this compilation.  */
 350 extern const char *user_label_prefix;
 351
 352 /* Default target function prologue and epilogue assembler output.  */
 353 extern void default_function_pro_epilogue (FILE *);
 354
 355 /* Default target function switched text sections.  */
 356 extern void default_function_switched_text_sections (FILE *, tree, bool);
 357
 358 /* Default target hook that outputs nothing to a stream.  */
 359 extern void no_asm_to_stream (FILE *);
 360
 361 /* Flags controlling properties of a section.  */
 362 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 363 #define SECTION_CODE     0x00100        /* contains code */
 364 #define SECTION_WRITE    0x00200        /* data is writable */
 365 #define SECTION_DEBUG    0x00400        /* contains debug data */
 366 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 367 #define SECTION_SMALL    0x01000        /* contains "small data" */
 368 #define SECTION_BSS      0x02000        /* contains zeros only */
 369 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 370 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 371 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 372                                            embedded zeros */
 373 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 374 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 375 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 376 #define SECTION_DECLARED 0x100000       /* section has been used */
 377 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 378 #define SECTION_COMMON   0x800000       /* contains common data */
 379 #define SECTION_RELRO    0x1000000      /* data is readonly after relocation processing */
 380 #define SECTION_EXCLUDE  0x2000000      /* discarded by the linker */
 381 #define SECTION_MACH_DEP 0x4000000      /* subsequent bits reserved for target */
 382
 383 /* This SECTION_STYLE is used for unnamed sections that we can switch
 384    to using a special assembler directive.  */
 385 #define SECTION_UNNAMED  0x000000
 386
 387 /* This SECTION_STYLE is used for named sections that we can switch
 388    to using a general section directive.  */
 389 #define SECTION_NAMED    0x200000
 390
 391 /* This SECTION_STYLE is used for sections that we cannot switch to at
 392    all.  The choice of section is implied by the directive that we use
 393    to declare the object.  */
 394 #define SECTION_NOSWITCH 0x400000
 395
 396 /* A helper function for default_elf_select_section and
 397    default_elf_unique_section.  Categorizes the DECL.  */
 398
 399 enum section_category
 400 {
 401   SECCAT_TEXT,
 402
 403   SECCAT_RODATA,
 404   SECCAT_RODATA_MERGE_STR,
 405   SECCAT_RODATA_MERGE_STR_INIT,
 406   SECCAT_RODATA_MERGE_CONST,
 407   SECCAT_SRODATA,
 408
 409   SECCAT_DATA,
 410
 411   /* To optimize loading of shared programs, define following subsections
 412      of data section:
 413         _REL    Contains data that has relocations, so they get grouped
 414                 together and dynamic linker will visit fewer pages in memory.
 415         _RO     Contains data that is otherwise read-only.  This is useful
 416                 with prelinking as most relocations won't be dynamically
 417                 linked and thus stay read only.
 418         _LOCAL  Marks data containing relocations only to local objects.
 419                 These relocations will get fully resolved by prelinking.  */
 420   SECCAT_DATA_REL,
 421   SECCAT_DATA_REL_LOCAL,
 422   SECCAT_DATA_REL_RO,
 423   SECCAT_DATA_REL_RO_LOCAL,
 424
 425   SECCAT_SDATA,
 426   SECCAT_TDATA,
 427
 428   SECCAT_BSS,
 429   SECCAT_SBSS,
 430   SECCAT_TBSS
 431 };
 432
 433 /* Information that is provided by all instances of the section type.  */
 434 struct GTY(()) section_common {
 435   /* The set of SECTION_* flags that apply to this section.  */
 436   unsigned int flags;
 437 };
 438
 439 /* Information about a SECTION_NAMED section.  */
 440 struct GTY(()) named_section {
 441   struct section_common common;
 442
 443   /* The name of the section.  */
 444   const char *name;
 445
 446   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 447      section is associated.  */
 448   tree decl;
 449 };
 450
 451 /* A callback that writes the assembly code for switching to an unnamed
 452    section.  The argument provides callback-specific data.  */
 453 typedef void (*unnamed_section_callback) (const void *);
 454
 455 /* Information about a SECTION_UNNAMED section.  */
 456 struct GTY(()) unnamed_section {
 457   struct section_common common;
 458
 459   /* The callback used to switch to the section, and the data that
 460      should be passed to the callback.  */
 461   unnamed_section_callback GTY ((skip)) callback;
 462   const void *GTY ((skip)) data;
 463
 464   /* The next entry in the chain of unnamed sections.  */
 465   section *next;
 466 };
 467
 468 /* A callback that writes the assembly code for a decl in a
 469    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 470    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 471    in bytes and ROUNDED is that size rounded up to the next
 472    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 473
 474    Return true if the callback used DECL_ALIGN to set the object's
 475    alignment.  A false return value implies that we are relying
 476    on the rounded size to align the decl.  */
 477 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 478                                            unsigned HOST_WIDE_INT size,
 479                                            unsigned HOST_WIDE_INT rounded);
 480
 481 /* Information about a SECTION_NOSWITCH section.  */
 482 struct GTY(()) noswitch_section {
 483   struct section_common common;
 484
 485   /* The callback used to assemble decls in this section.  */
 486   noswitch_section_callback GTY ((skip)) callback;
 487 };
 488
 489 /* Information about a section, which may be named or unnamed.  */
 490 union GTY ((desc ("SECTION_STYLE (&(%h))"), for_user)) section {
 491   struct section_common GTY ((skip)) common;
 492   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 493   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 494   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 495 };
 496
 497 /* Return the style of section SECT.  */
 498 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 499
 500 struct object_block;
 501
 502 /* Special well-known sections.  */
 503 extern GTY(()) section *text_section;
 504 extern GTY(()) section *data_section;
 505 extern GTY(()) section *readonly_data_section;
 506 extern GTY(()) section *sdata_section;
 507 extern GTY(()) section *ctors_section;
 508 extern GTY(()) section *dtors_section;
 509 extern GTY(()) section *bss_section;
 510 extern GTY(()) section *sbss_section;
 511 extern GTY(()) section *exception_section;
 512 extern GTY(()) section *eh_frame_section;
 513 extern GTY(()) section *tls_comm_section;
 514 extern GTY(()) section *comm_section;
 515 extern GTY(()) section *lcomm_section;
 516 extern GTY(()) section *bss_noswitch_section;
 517
 518 extern GTY(()) section *in_section;
 519 extern GTY(()) bool in_cold_section_p;
 520
 521 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 522                                      const void *);
 523 extern section *get_section (const char *, unsigned int, tree);
 524 extern section *get_named_section (tree, const char *, int);
 525 extern section *get_variable_section (tree, bool);
 526 extern void place_block_symbol (rtx);
 527 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 528                                enum tls_model);
 529 extern section *mergeable_constant_section (machine_mode,
 530                                             unsigned HOST_WIDE_INT,
 531                                             unsigned int);
 532 extern section *function_section (tree);
 533 extern section *unlikely_text_section (void);
 534 extern section *current_function_section (void);
 535 extern void switch_to_other_text_partition (void);
 536
 537 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
 538    not) section for PRIORITY.  */
 539 extern section *get_cdtor_priority_section (int, bool);
 540
 541 extern bool unlikely_text_section_p (section *);
 542 extern void switch_to_section (section *);
 543 extern void output_section_asm_op (const void *);
 544
 545 extern void record_tm_clone_pair (tree, tree);
 546 extern void finish_tm_clone_pairs (void);
 547 extern tree get_tm_clone_pair (tree);
 548
 549 extern void default_asm_output_source_filename (FILE *, const char *);
 550 extern void output_file_directive (FILE *, const char *);
 551
 552 extern unsigned int default_section_type_flags (tree, const char *, int);
 553
 554 extern bool have_global_bss_p (void);
 555 extern bool bss_initializer_p (const_tree, bool = false);
 556
 557 extern void default_no_named_section (const char *, unsigned int, tree);
 558 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 559 extern enum section_category categorize_decl_for_section (const_tree, int);
 560 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 561 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 562
 563 extern void default_named_section_asm_out_destructor (rtx, int);
 564 extern void default_dtor_section_asm_out_destructor (rtx, int);
 565 extern void default_named_section_asm_out_constructor (rtx, int);
 566 extern void default_ctor_section_asm_out_constructor (rtx, int);
 567
 568 extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
 569 extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
 570 extern void default_unique_section (tree, int);
 571 extern section *default_function_rodata_section (tree);
 572 extern section *default_no_function_rodata_section (tree);
 573 extern section *default_clone_table_section (void);
 574 extern section *default_select_rtx_section (machine_mode, rtx,
 575                                             unsigned HOST_WIDE_INT);
 576 extern section *default_elf_select_rtx_section (machine_mode, rtx,
 577                                                 unsigned HOST_WIDE_INT);
 578 extern void default_encode_section_info (tree, rtx, int);
 579 extern const char *default_strip_name_encoding (const char *);
 580 extern void default_asm_output_anchor (rtx);
 581 extern bool default_use_anchors_for_symbol_p (const_rtx);
 582 extern bool default_binds_local_p (const_tree);
 583 extern bool default_binds_local_p_1 (const_tree, int);
 584 extern bool default_binds_local_p_2 (const_tree);
 585 extern bool default_binds_local_p_3 (const_tree, bool, bool, bool, bool);
 586 extern void default_globalize_label (FILE *, const char *);
 587 extern void default_globalize_decl_name (FILE *, tree);
 588 extern void default_emit_unwind_label (FILE *, tree, int, int);
 589 extern void default_emit_except_table_label (FILE *);
 590 extern void default_generate_internal_label (char *, const char *,
 591                                              unsigned long);
 592 extern void default_internal_label (FILE *, const char *, unsigned long);
 593 extern void default_asm_declare_constant_name (FILE *, const char *,
 594                                                const_tree, HOST_WIDE_INT);
 595 extern void default_file_start (void);
 596 extern void file_end_indicate_exec_stack (void);
 597 extern void file_end_indicate_split_stack (void);
 598
 599 extern void default_elf_asm_output_external (FILE *file, tree,
 600                                              const char *);
 601 extern void default_elf_asm_output_limited_string (FILE *, const char *);
 602 extern void default_elf_asm_output_ascii (FILE *, const char *, unsigned int);
 603 extern void default_elf_internal_label (FILE *, const char *, unsigned long);
 604
 605 extern void default_elf_init_array_asm_out_constructor (rtx, int);
 606 extern void default_elf_fini_array_asm_out_destructor (rtx, int);
 607 extern int maybe_assemble_visibility (tree);
 608
 609 extern int default_address_cost (rtx, machine_mode, addr_space_t, bool);
 610
 611 /* Output stack usage information.  */
 612 extern void output_stack_usage (void);
 613
 614 #endif /* ! GCC_OUTPUT_H */