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, 1999, 2000, 2001, 2002,
   4    2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
   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 /* 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);
  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
 112    using machine-dependent assembler syntax.  */
 113 extern void output_address (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 /* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
 136    words.  */
 137 extern void split_double (rtx, rtx *, rtx *);
 138
 139 /* Return nonzero if this function has no function calls.  */
 140 extern int leaf_function_p (void);
 141
 142 /* Return 1 if branch is a forward branch.
 143    Uses insn_shuid array, so it works only in the final pass.  May be used by
 144    output templates to add branch prediction hints, for example.  */
 145 extern int final_forward_branch_p (rtx);
 146
 147 /* Return 1 if this function uses only the registers that can be
 148    safely renumbered.  */
 149 extern int only_leaf_regs_used (void);
 150
 151 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
 152    available in leaf functions.  */
 153 extern void leaf_renumber_regs_insn (rtx);
 154
 155 /* Locate the proper template for the given insn-code.  */
 156 extern const char *get_insn_template (int, rtx);
 157
 158 /* Functions in varasm.c.  */
 159
 160 /* Emit any pending weak declarations.  */
 161 extern void weak_finish (void);
 162
 163 /* Decode an `asm' spec for a declaration as a register name.
 164    Return the register number, or -1 if nothing specified,
 165    or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
 166    or -3 if ASMSPEC is `cc' and is not recognized,
 167    or -4 if ASMSPEC is `memory' and is not recognized.
 168    Accept an exact spelling or a decimal number.
 169    Prefixes such as % are optional.  */
 170 extern int decode_reg_name (const char *);
 171
 172 /* Similar to decode_reg_name, but takes an extra parameter that is a
 173    pointer to the number of (internal) registers described by the
 174    external name.  */
 175 extern int decode_reg_name_and_count (const char *, int *);
 176
 177 extern void do_assemble_alias (tree, tree);
 178
 179 extern void default_assemble_visibility (tree, int);
 180
 181 /* Output a string of literal assembler code
 182    for an `asm' keyword used between functions.  */
 183 extern void assemble_asm (tree);
 184
 185 /* Output assembler code for the constant pool of a function and associated
 186    with defining the name of the function.  DECL describes the function.
 187    NAME is the function's name.  For the constant pool, we use the current
 188    constant pool data.  */
 189 extern void assemble_start_function (tree, const char *);
 190
 191 /* Output assembler code associated with defining the size of the
 192    function.  DECL describes the function.  NAME is the function's name.  */
 193 extern void assemble_end_function (tree, const char *);
 194
 195 /* Assemble everything that is needed for a variable or function declaration.
 196    Not used for automatic variables, and not used for function definitions.
 197    Should not be called for variables of incomplete structure type.
 198
 199    TOP_LEVEL is nonzero if this variable has file scope.
 200    AT_END is nonzero if this is the special handling, at end of compilation,
 201    to define things that have had only tentative definitions.
 202    DONT_OUTPUT_DATA if nonzero means don't actually output the
 203    initial value (that will be done by the caller).  */
 204 extern void assemble_variable (tree, int, int, int);
 205
 206 /* Compute the alignment of variable specified by DECL.
 207    DONT_OUTPUT_DATA is from assemble_variable.  */
 208 extern void align_variable (tree decl, bool dont_output_data);
 209
 210 /* Queue for outputting something to declare an external symbol to the
 211    assembler.  (Most assemblers don't need this, so we normally output
 212    nothing.)  Do nothing if DECL is not external.  */
 213 extern void assemble_external (tree);
 214
 215 /* Assemble code to leave SIZE bytes of zeros.  */
 216 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 217
 218 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 219 extern void assemble_align (int);
 220
 221 /* Assemble a string constant with the specified C string as contents.  */
 222 extern void assemble_string (const char *, int);
 223
 224 /* Similar, for calling a library function FUN.  */
 225 extern void assemble_external_libcall (rtx);
 226
 227 /* Assemble a label named NAME.  */
 228 extern void assemble_label (FILE *, const char *);
 229
 230 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 231    starts with a *, the rest of NAME is output verbatim.  Otherwise
 232    NAME is transformed in a target-specific way (usually by the
 233    addition of an underscore).  */
 234 extern void assemble_name_raw (FILE *, const char *);
 235
 236 /* Like assemble_name_raw, but should be used when NAME might refer to
 237    an entity that is also represented as a tree (like a function or
 238    variable).  If NAME does refer to such an entity, that entity will
 239    be marked as referenced.  */
 240 extern void assemble_name (FILE *, const char *);
 241
 242 /* Return the assembler directive for creating a given kind of integer
 243    object.  SIZE is the number of bytes in the object and ALIGNED_P
 244    indicates whether it is known to be aligned.  Return NULL if the
 245    assembly dialect has no such directive.
 246
 247    The returned string should be printed at the start of a new line and
 248    be followed immediately by the object's initial value.  */
 249 extern const char *integer_asm_op (int, int);
 250
 251 /* Use directive OP to assemble an integer object X.  Print OP at the
 252    start of the line, followed immediately by the value of X.  */
 253 extern void assemble_integer_with_op (const char *, rtx);
 254
 255 /* The default implementation of the asm_out.integer target hook.  */
 256 extern bool default_assemble_integer (rtx, unsigned int, int);
 257
 258 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 259    the alignment of the integer in bits.  Return 1 if we were able to output
 260    the constant, otherwise 0.  If FORCE is nonzero the constant must
 261    be outputable. */
 262 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 263
 264 /* Return section for TEXT_SECITON_NAME if DECL or DECL_SECTION_NAME (DECL)
 265    is NULL.  */
 266 extern section *get_named_text_section (tree, const char *, const char *);
 267
 268 /* An interface to assemble_integer for the common case in which a value is
 269    fully aligned and must be printed.  VALUE is the value of the integer
 270    object and SIZE is the number of bytes it contains.  */
 271 #define assemble_aligned_integer(SIZE, VALUE) \
 272   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 273
 274 #ifdef REAL_VALUE_TYPE_SIZE
 275 /* Assemble the floating-point constant D into an object of size MODE.  */
 276 extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
 277 #endif
 278
 279 /* Write the address of the entity given by SYMBOL to SEC.  */
 280 extern void assemble_addr_to_section (rtx, section *);
 281
 282 /* Return the size of the constant pool.  */
 283 extern int get_pool_size (void);
 284
 285 #ifdef HAVE_peephole
 286 extern rtx peephole (rtx);
 287 #endif
 288
 289 extern void output_shared_constant_pool (void);
 290
 291 extern void output_object_blocks (void);
 292
 293 extern void output_quoted_string (FILE *, const char *);
 294
 295 /* Whether a constructor CTOR is a valid static constant initializer if all
 296    its elements are.  This used to be internal to initializer_constant_valid_p
 297    and has been exposed to let other functions like categorize_ctor_elements
 298    evaluate the property while walking a constructor for other purposes.  */
 299
 300 extern bool constructor_static_from_elts_p (const_tree);
 301
 302 /* Output assembler code for constant EXP to FILE, with no label.
 303    This includes the pseudo-op such as ".int" or ".byte", and a newline.
 304    Assumes output_addressed_constants has been done on EXP already.
 305
 306    Generate exactly SIZE bytes of assembler data, padding at the end
 307    with zeros if necessary.  SIZE must always be specified.
 308
 309    ALIGN is the alignment in bits that may be assumed for the data.  */
 310 extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
 311
 312 /* When outputting delayed branch sequences, this rtx holds the
 313    sequence being output.  It is null when no delayed branch
 314    sequence is being output, so it can be used as a test in the
 315    insn output code.
 316
 317    This variable is defined  in final.c.  */
 318 extern rtx final_sequence;
 319
 320 /* The line number of the beginning of the current function.  Various
 321    md code needs this so that it can output relative linenumbers.  */
 322
 323 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 324 extern int sdb_begin_function_line;
 325 #endif
 326
 327 /* File in which assembler code is being written.  */
 328
 329 #ifdef BUFSIZ
 330 extern FILE *asm_out_file;
 331 #endif
 332
 333 /* The first global object in the file.  */
 334 extern const char *first_global_object_name;
 335
 336 /* The first weak object in the file.  */
 337 extern const char *weak_global_object_name;
 338
 339 /* Nonzero if function being compiled doesn't contain any calls
 340    (ignoring the prologue and epilogue).  This is set prior to
 341    local register allocation and is valid for the remaining
 342    compiler passes.  */
 343
 344 extern int current_function_is_leaf;
 345
 346 /* Nonzero if function being compiled doesn't modify the stack pointer
 347    (ignoring the prologue and epilogue).  This is only valid after
 348    pass_stack_ptr_mod has run.  */
 349
 350 extern int current_function_sp_is_unchanging;
 351
 352 /* Nonzero if the function being compiled is a leaf function which only
 353    uses leaf registers.  This is valid after reload (specifically after
 354    sched2) and is useful only if the port defines LEAF_REGISTERS.  */
 355
 356 extern int current_function_uses_only_leaf_regs;
 357
 358 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 359 extern rtx current_insn_predicate;
 360
 361 /* Last insn processed by final_scan_insn.  */
 362 extern rtx current_output_insn;
 363
 364 /* Nonzero while outputting an `asm' with operands.
 365    This means that inconsistencies are the user's fault, so don't die.
 366    The precise value is the insn being output, to pass to error_for_asm.  */
 367 extern rtx this_is_asm_operands;
 368
 369 /* Carry information from ASM_DECLARE_OBJECT_NAME
 370    to ASM_FINISH_DECLARE_OBJECT.  */
 371 extern int size_directive_output;
 372 extern tree last_assemble_variable_decl;
 373
 374 extern bool first_function_block_is_cold;
 375
 376 /* Decide whether DECL needs to be in a writable section.
 377    RELOC is the same as for SELECT_SECTION.  */
 378 extern bool decl_readonly_section (const_tree, int);
 379
 380 /* This can be used to compute RELOC for the function above, when
 381    given a constant expression.  */
 382 extern int compute_reloc_for_constant (tree);
 383
 384 /* User label prefix in effect for this compilation.  */
 385 extern const char *user_label_prefix;
 386
 387 /* Default target function prologue and epilogue assembler output.  */
 388 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
 389
 390 /* Default target function switched text sections.  */
 391 extern void default_function_switched_text_sections (FILE *, tree, bool);
 392
 393 /* Default target hook that outputs nothing to a stream.  */
 394 extern void no_asm_to_stream (FILE *);
 395
 396 /* Flags controlling properties of a section.  */
 397 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 398 #define SECTION_CODE     0x00100        /* contains code */
 399 #define SECTION_WRITE    0x00200        /* data is writable */
 400 #define SECTION_DEBUG    0x00400        /* contains debug data */
 401 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 402 #define SECTION_SMALL    0x01000        /* contains "small data" */
 403 #define SECTION_BSS      0x02000        /* contains zeros only */
 404 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 405 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 406 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 407                                            embedded zeros */
 408 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 409 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 410 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 411 #define SECTION_DECLARED 0x100000       /* section has been used */
 412 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 413 #define SECTION_COMMON   0x800000       /* contains common data */
 414 #define SECTION_RELRO    0x1000000      /* data is readonly after relocation processing */
 415 #define SECTION_EXCLUDE  0x2000000      /* discarded by the linker */
 416 #define SECTION_MACH_DEP 0x4000000      /* subsequent bits reserved for target */
 417
 418 /* This SECTION_STYLE is used for unnamed sections that we can switch
 419    to using a special assembler directive.  */
 420 #define SECTION_UNNAMED  0x000000
 421
 422 /* This SECTION_STYLE is used for named sections that we can switch
 423    to using a general section directive.  */
 424 #define SECTION_NAMED    0x200000
 425
 426 /* This SECTION_STYLE is used for sections that we cannot switch to at
 427    all.  The choice of section is implied by the directive that we use
 428    to declare the object.  */
 429 #define SECTION_NOSWITCH 0x400000
 430
 431 /* A helper function for default_elf_select_section and
 432    default_elf_unique_section.  Categorizes the DECL.  */
 433
 434 enum section_category
 435 {
 436   SECCAT_TEXT,
 437
 438   SECCAT_RODATA,
 439   SECCAT_RODATA_MERGE_STR,
 440   SECCAT_RODATA_MERGE_STR_INIT,
 441   SECCAT_RODATA_MERGE_CONST,
 442   SECCAT_SRODATA,
 443
 444   SECCAT_DATA,
 445
 446   /* To optimize loading of shared programs, define following subsections
 447      of data section:
 448         _REL    Contains data that has relocations, so they get grouped
 449                 together and dynamic linker will visit fewer pages in memory.
 450         _RO     Contains data that is otherwise read-only.  This is useful
 451                 with prelinking as most relocations won't be dynamically
 452                 linked and thus stay read only.
 453         _LOCAL  Marks data containing relocations only to local objects.
 454                 These relocations will get fully resolved by prelinking.  */
 455   SECCAT_DATA_REL,
 456   SECCAT_DATA_REL_LOCAL,
 457   SECCAT_DATA_REL_RO,
 458   SECCAT_DATA_REL_RO_LOCAL,
 459
 460   SECCAT_SDATA,
 461   SECCAT_TDATA,
 462
 463   SECCAT_BSS,
 464   SECCAT_SBSS,
 465   SECCAT_TBSS
 466 };
 467
 468 /* Information that is provided by all instances of the section type.  */
 469 struct GTY(()) section_common {
 470   /* The set of SECTION_* flags that apply to this section.  */
 471   unsigned int flags;
 472 };
 473
 474 /* Information about a SECTION_NAMED section.  */
 475 struct GTY(()) named_section {
 476   struct section_common common;
 477
 478   /* The name of the section.  */
 479   const char *name;
 480
 481   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 482      section is associated.  */
 483   tree decl;
 484 };
 485
 486 /* A callback that writes the assembly code for switching to an unnamed
 487    section.  The argument provides callback-specific data.  */
 488 typedef void (*unnamed_section_callback) (const void *);
 489
 490 /* Information about a SECTION_UNNAMED section.  */
 491 struct GTY(()) unnamed_section {
 492   struct section_common common;
 493
 494   /* The callback used to switch to the section, and the data that
 495      should be passed to the callback.  */
 496   unnamed_section_callback GTY ((skip)) callback;
 497   const void *GTY ((skip)) data;
 498
 499   /* The next entry in the chain of unnamed sections.  */
 500   section *next;
 501 };
 502
 503 /* A callback that writes the assembly code for a decl in a
 504    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 505    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 506    in bytes and ROUNDED is that size rounded up to the next
 507    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 508
 509    Return true if the callback used DECL_ALIGN to set the object's
 510    alignment.  A false return value implies that we are relying
 511    on the rounded size to align the decl.  */
 512 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 513                                            unsigned HOST_WIDE_INT size,
 514                                            unsigned HOST_WIDE_INT rounded);
 515
 516 /* Information about a SECTION_NOSWITCH section.  */
 517 struct GTY(()) noswitch_section {
 518   struct section_common common;
 519
 520   /* The callback used to assemble decls in this section.  */
 521   noswitch_section_callback GTY ((skip)) callback;
 522 };
 523
 524 /* Information about a section, which may be named or unnamed.  */
 525 union GTY ((desc ("SECTION_STYLE (&(%h))"))) section {
 526   struct section_common GTY ((skip)) common;
 527   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 528   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 529   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 530 };
 531
 532 /* Return the style of section SECT.  */
 533 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 534
 535 struct object_block;
 536
 537 /* Special well-known sections.  */
 538 extern GTY(()) section *text_section;
 539 extern GTY(()) section *data_section;
 540 extern GTY(()) section *readonly_data_section;
 541 extern GTY(()) section *sdata_section;
 542 extern GTY(()) section *ctors_section;
 543 extern GTY(()) section *dtors_section;
 544 extern GTY(()) section *bss_section;
 545 extern GTY(()) section *sbss_section;
 546 extern GTY(()) section *exception_section;
 547 extern GTY(()) section *eh_frame_section;
 548 extern GTY(()) section *tls_comm_section;
 549 extern GTY(()) section *comm_section;
 550 extern GTY(()) section *lcomm_section;
 551 extern GTY(()) section *bss_noswitch_section;
 552
 553 extern GTY(()) section *in_section;
 554 extern GTY(()) bool in_cold_section_p;
 555
 556 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 557                                      const void *);
 558 extern section *get_section (const char *, unsigned int, tree);
 559 extern section *get_named_section (tree, const char *, int);
 560 extern section *get_variable_section (tree, bool);
 561 extern void place_block_symbol (rtx);
 562 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 563                                enum tls_model);
 564 extern section *mergeable_constant_section (enum machine_mode,
 565                                             unsigned HOST_WIDE_INT,
 566                                             unsigned int);
 567 extern section *function_section (tree);
 568 extern section *unlikely_text_section (void);
 569 extern section *current_function_section (void);
 570
 571 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
 572    not) section for PRIORITY.  */
 573 extern section *get_cdtor_priority_section (int, bool);
 574
 575 extern bool unlikely_text_section_p (section *);
 576 extern void switch_to_section (section *);
 577 extern void output_section_asm_op (const void *);
 578
 579 extern void record_tm_clone_pair (tree, tree);
 580 extern void finish_tm_clone_pairs (void);
 581 extern tree get_tm_clone_pair (tree);
 582
 583 extern void default_asm_output_source_filename (FILE *, const char *);
 584 extern void output_file_directive (FILE *, const char *);
 585
 586 extern unsigned int default_section_type_flags (tree, const char *, int);
 587
 588 extern bool have_global_bss_p (void);
 589 extern void default_no_named_section (const char *, unsigned int, tree);
 590 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 591 extern enum section_category categorize_decl_for_section (const_tree, int);
 592 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 593 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 594
 595 extern void default_named_section_asm_out_destructor (rtx, int);
 596 extern void default_dtor_section_asm_out_destructor (rtx, int);
 597 extern void default_named_section_asm_out_constructor (rtx, int);
 598 extern void default_ctor_section_asm_out_constructor (rtx, int);
 599
 600 extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
 601 extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
 602 extern void default_unique_section (tree, int);
 603 extern section *default_function_rodata_section (tree);
 604 extern section *default_no_function_rodata_section (tree);
 605 extern section *default_clone_table_section (void);
 606 extern section *default_select_rtx_section (enum machine_mode, rtx,
 607                                             unsigned HOST_WIDE_INT);
 608 extern section *default_elf_select_rtx_section (enum machine_mode, rtx,
 609                                                 unsigned HOST_WIDE_INT);
 610 extern void default_encode_section_info (tree, rtx, int);
 611 extern const char *default_strip_name_encoding (const char *);
 612 extern void default_asm_output_anchor (rtx);
 613 extern bool default_use_anchors_for_symbol_p (const_rtx);
 614 extern bool default_binds_local_p (const_tree);
 615 extern bool default_binds_local_p_1 (const_tree, int);
 616 extern void default_globalize_label (FILE *, const char *);
 617 extern void default_globalize_decl_name (FILE *, tree);
 618 extern void default_emit_unwind_label (FILE *, tree, int, int);
 619 extern void default_emit_except_table_label (FILE *);
 620 extern void default_generate_internal_label (char *, const char *,
 621                                              unsigned long);
 622 extern void default_internal_label (FILE *, const char *, unsigned long);
 623 extern void default_asm_declare_constant_name (FILE *, const char *,
 624                                                const_tree, HOST_WIDE_INT);
 625 extern void default_file_start (void);
 626 extern void file_end_indicate_exec_stack (void);
 627 extern void file_end_indicate_split_stack (void);
 628
 629 extern void default_elf_asm_output_external (FILE *file, tree,
 630                                              const char *);
 631 extern void default_elf_asm_output_limited_string (FILE *, const char *);
 632 extern void default_elf_asm_output_ascii (FILE *, const char *, unsigned int);
 633 extern void default_elf_internal_label (FILE *, const char *, unsigned long);
 634
 635 extern void default_elf_init_array_asm_out_constructor (rtx, int);
 636 extern void default_elf_fini_array_asm_out_destructor (rtx, int);
 637 extern int maybe_assemble_visibility (tree);
 638
 639 extern int default_address_cost (rtx, bool);
 640
 641 /* Output stack usage information.  */
 642 extern void output_stack_usage (void);
 643
 644 #endif /* ! GCC_OUTPUT_H */