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 /* This is a magic identifier which allows GCC to figure out the type
 125    of HOST_WIDE_INT for %wd specifier checks.  You must issue this
 126    typedef before using the __asm_fprintf__ format attribute.  */
 127 typedef HOST_WIDE_INT __gcc_host_wide_int__;
 128 #else
 129 #define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
 130 #endif
 131
 132 extern void fprint_whex (FILE *, unsigned HOST_WIDE_INT);
 133 extern void fprint_ul (FILE *, unsigned long);
 134 extern int sprint_ul (char *, unsigned long);
 135
 136 extern void asm_fprintf (FILE *file, const char *p, ...)
 137      ATTRIBUTE_ASM_FPRINTF(2, 3);
 138
 139 /* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
 140    words.  */
 141 extern void split_double (rtx, rtx *, rtx *);
 142
 143 /* Return nonzero if this function has no function calls.  */
 144 extern int leaf_function_p (void);
 145
 146 /* Return 1 if branch is a forward branch.
 147    Uses insn_shuid array, so it works only in the final pass.  May be used by
 148    output templates to add branch prediction hints, for example.  */
 149 extern int final_forward_branch_p (rtx);
 150
 151 /* Return 1 if this function uses only the registers that can be
 152    safely renumbered.  */
 153 extern int only_leaf_regs_used (void);
 154
 155 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
 156    available in leaf functions.  */
 157 extern void leaf_renumber_regs_insn (rtx);
 158
 159 /* Locate the proper template for the given insn-code.  */
 160 extern const char *get_insn_template (int, rtx);
 161
 162 /* Functions in varasm.c.  */
 163
 164 /* Declare DECL to be a weak symbol.  */
 165 extern void declare_weak (tree);
 166 /* Merge weak status.  */
 167 extern void merge_weak (tree, tree);
 168
 169 /* Emit any pending weak declarations.  */
 170 extern void weak_finish (void);
 171
 172 /* Return the default TLS model for a given variable.  */
 173 extern enum tls_model decl_default_tls_model (const_tree);
 174
 175 /* Decode an `asm' spec for a declaration as a register name.
 176    Return the register number, or -1 if nothing specified,
 177    or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
 178    or -3 if ASMSPEC is `cc' and is not recognized,
 179    or -4 if ASMSPEC is `memory' and is not recognized.
 180    Accept an exact spelling or a decimal number.
 181    Prefixes such as % are optional.  */
 182 extern int decode_reg_name (const char *);
 183
 184 /* Similar to decode_reg_name, but takes an extra parameter that is a
 185    pointer to the number of (internal) registers described by the
 186    external name.  */
 187 extern int decode_reg_name_and_count (const char *, int *);
 188
 189 extern void assemble_alias (tree, tree);
 190
 191 extern void default_assemble_visibility (tree, int);
 192
 193 /* Output a string of literal assembler code
 194    for an `asm' keyword used between functions.  */
 195 extern void assemble_asm (tree);
 196
 197 /* Output assembler code for the constant pool of a function and associated
 198    with defining the name of the function.  DECL describes the function.
 199    NAME is the function's name.  For the constant pool, we use the current
 200    constant pool data.  */
 201 extern void assemble_start_function (tree, const char *);
 202
 203 /* Output assembler code associated with defining the size of the
 204    function.  DECL describes the function.  NAME is the function's name.  */
 205 extern void assemble_end_function (tree, const char *);
 206
 207 /* Assemble everything that is needed for a variable or function declaration.
 208    Not used for automatic variables, and not used for function definitions.
 209    Should not be called for variables of incomplete structure type.
 210
 211    TOP_LEVEL is nonzero if this variable has file scope.
 212    AT_END is nonzero if this is the special handling, at end of compilation,
 213    to define things that have had only tentative definitions.
 214    DONT_OUTPUT_DATA if nonzero means don't actually output the
 215    initial value (that will be done by the caller).  */
 216 extern void assemble_variable (tree, int, int, int);
 217
 218 /* Compute the alignment of variable specified by DECL.
 219    DONT_OUTPUT_DATA is from assemble_variable.  */
 220 extern void align_variable (tree decl, bool dont_output_data);
 221
 222 /* Queue for outputting something to declare an external symbol to the
 223    assembler.  (Most assemblers don't need this, so we normally output
 224    nothing.)  Do nothing if DECL is not external.  */
 225 extern void assemble_external (tree);
 226
 227 /* Assemble code to leave SIZE bytes of zeros.  */
 228 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 229
 230 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 231 extern void assemble_align (int);
 232
 233 /* Assemble a string constant with the specified C string as contents.  */
 234 extern void assemble_string (const char *, int);
 235
 236 /* Similar, for calling a library function FUN.  */
 237 extern void assemble_external_libcall (rtx);
 238
 239 /* Assemble a label named NAME.  */
 240 extern void assemble_label (FILE *, const char *);
 241
 242 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 243    starts with a *, the rest of NAME is output verbatim.  Otherwise
 244    NAME is transformed in a target-specific way (usually by the
 245    addition of an underscore).  */
 246 extern void assemble_name_raw (FILE *, const char *);
 247
 248 /* Like assemble_name_raw, but should be used when NAME might refer to
 249    an entity that is also represented as a tree (like a function or
 250    variable).  If NAME does refer to such an entity, that entity will
 251    be marked as referenced.  */
 252 extern void assemble_name (FILE *, const char *);
 253
 254 /* Return the assembler directive for creating a given kind of integer
 255    object.  SIZE is the number of bytes in the object and ALIGNED_P
 256    indicates whether it is known to be aligned.  Return NULL if the
 257    assembly dialect has no such directive.
 258
 259    The returned string should be printed at the start of a new line and
 260    be followed immediately by the object's initial value.  */
 261 extern const char *integer_asm_op (int, int);
 262
 263 /* Use directive OP to assemble an integer object X.  Print OP at the
 264    start of the line, followed immediately by the value of X.  */
 265 extern void assemble_integer_with_op (const char *, rtx);
 266
 267 /* The default implementation of the asm_out.integer target hook.  */
 268 extern bool default_assemble_integer (rtx, unsigned int, int);
 269
 270 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 271    the alignment of the integer in bits.  Return 1 if we were able to output
 272    the constant, otherwise 0.  If FORCE is nonzero the constant must
 273    be outputable. */
 274 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 275
 276 /* Return section for TEXT_SECITON_NAME if DECL or DECL_SECTION_NAME (DECL)
 277    is NULL.  */
 278 extern section *get_named_text_section (tree, const char *, const char *);
 279
 280 /* An interface to assemble_integer for the common case in which a value is
 281    fully aligned and must be printed.  VALUE is the value of the integer
 282    object and SIZE is the number of bytes it contains.  */
 283 #define assemble_aligned_integer(SIZE, VALUE) \
 284   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 285
 286 #ifdef REAL_VALUE_TYPE_SIZE
 287 /* Assemble the floating-point constant D into an object of size MODE.  */
 288 extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
 289 #endif
 290
 291 /* Write the address of the entity given by SYMBOL to SEC.  */
 292 extern void assemble_addr_to_section (rtx, section *);
 293
 294 /* Return the size of the constant pool.  */
 295 extern int get_pool_size (void);
 296
 297 #ifdef HAVE_peephole
 298 extern rtx peephole (rtx);
 299 #endif
 300
 301 extern void output_shared_constant_pool (void);
 302
 303 extern void output_object_blocks (void);
 304
 305 extern void output_quoted_string (FILE *, const char *);
 306
 307 /* Whether a constructor CTOR is a valid static constant initializer if all
 308    its elements are.  This used to be internal to initializer_constant_valid_p
 309    and has been exposed to let other functions like categorize_ctor_elements
 310    evaluate the property while walking a constructor for other purposes.  */
 311
 312 extern bool constructor_static_from_elts_p (const_tree);
 313
 314 /* Return nonzero if VALUE is a valid constant-valued expression
 315    for use in initializing a static variable; one that can be an
 316    element of a "constant" initializer.
 317
 318    Return null_pointer_node if the value is absolute;
 319    if it is relocatable, return the variable that determines the relocation.
 320    We assume that VALUE has been folded as much as possible;
 321    therefore, we do not need to check for such things as
 322    arithmetic-combinations of integers.  */
 323 extern tree initializer_constant_valid_p (tree, tree);
 324
 325 /* Return true if VALUE is a valid constant-valued expression
 326    for use in initializing a static bit-field; one that can be
 327    an element of a "constant" initializer.  */
 328 extern bool initializer_constant_valid_for_bitfield_p (tree);
 329
 330 /* Output assembler code for constant EXP to FILE, with no label.
 331    This includes the pseudo-op such as ".int" or ".byte", and a newline.
 332    Assumes output_addressed_constants has been done on EXP already.
 333
 334    Generate exactly SIZE bytes of assembler data, padding at the end
 335    with zeros if necessary.  SIZE must always be specified.
 336
 337    ALIGN is the alignment in bits that may be assumed for the data.  */
 338 extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
 339
 340 /* When outputting delayed branch sequences, this rtx holds the
 341    sequence being output.  It is null when no delayed branch
 342    sequence is being output, so it can be used as a test in the
 343    insn output code.
 344
 345    This variable is defined  in final.c.  */
 346 extern rtx final_sequence;
 347
 348 /* The line number of the beginning of the current function.  Various
 349    md code needs this so that it can output relative linenumbers.  */
 350
 351 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
 352 extern int sdb_begin_function_line;
 353 #endif
 354
 355 /* File in which assembler code is being written.  */
 356
 357 #ifdef BUFSIZ
 358 extern FILE *asm_out_file;
 359 #endif
 360
 361 /* The first global object in the file.  */
 362 extern const char *first_global_object_name;
 363
 364 /* The first weak object in the file.  */
 365 extern const char *weak_global_object_name;
 366
 367 /* Nonzero if function being compiled doesn't contain any calls
 368    (ignoring the prologue and epilogue).  This is set prior to
 369    local register allocation and is valid for the remaining
 370    compiler passes.  */
 371
 372 extern int current_function_is_leaf;
 373
 374 /* Nonzero if function being compiled doesn't modify the stack pointer
 375    (ignoring the prologue and epilogue).  This is only valid after
 376    pass_stack_ptr_mod has run.  */
 377
 378 extern int current_function_sp_is_unchanging;
 379
 380 /* Nonzero if the function being compiled is a leaf function which only
 381    uses leaf registers.  This is valid after reload (specifically after
 382    sched2) and is useful only if the port defines LEAF_REGISTERS.  */
 383
 384 extern int current_function_uses_only_leaf_regs;
 385
 386 /* Default file in which to dump debug output.  */
 387
 388 #ifdef BUFSIZ
 389 extern FILE *dump_file;
 390 #endif
 391
 392 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 393 extern rtx current_insn_predicate;
 394
 395 /* Last insn processed by final_scan_insn.  */
 396 extern rtx current_output_insn;
 397
 398 /* Nonzero while outputting an `asm' with operands.
 399    This means that inconsistencies are the user's fault, so don't die.
 400    The precise value is the insn being output, to pass to error_for_asm.  */
 401 extern rtx this_is_asm_operands;
 402
 403 /* Carry information from ASM_DECLARE_OBJECT_NAME
 404    to ASM_FINISH_DECLARE_OBJECT.  */
 405 extern int size_directive_output;
 406 extern tree last_assemble_variable_decl;
 407
 408 extern bool first_function_block_is_cold;
 409
 410 /* Decide whether DECL needs to be in a writable section.
 411    RELOC is the same as for SELECT_SECTION.  */
 412 extern bool decl_readonly_section (const_tree, int);
 413
 414 /* This can be used to compute RELOC for the function above, when
 415    given a constant expression.  */
 416 extern int compute_reloc_for_constant (tree);
 417
 418 /* User label prefix in effect for this compilation.  */
 419 extern const char *user_label_prefix;
 420
 421 /* Default target function prologue and epilogue assembler output.  */
 422 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
 423
 424 /* Default target function switched text sections.  */
 425 extern void default_function_switched_text_sections (FILE *, tree, bool);
 426
 427 /* Default target hook that outputs nothing to a stream.  */
 428 extern void no_asm_to_stream (FILE *);
 429
 430 /* Flags controlling properties of a section.  */
 431 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 432 #define SECTION_CODE     0x00100        /* contains code */
 433 #define SECTION_WRITE    0x00200        /* data is writable */
 434 #define SECTION_DEBUG    0x00400        /* contains debug data */
 435 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 436 #define SECTION_SMALL    0x01000        /* contains "small data" */
 437 #define SECTION_BSS      0x02000        /* contains zeros only */
 438 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 439 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 440 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 441                                            embedded zeros */
 442 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 443 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 444 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 445 #define SECTION_DECLARED 0x100000       /* section has been used */
 446 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 447 #define SECTION_COMMON   0x800000       /* contains common data */
 448 #define SECTION_RELRO    0x1000000      /* data is readonly after relocation processing */
 449 #define SECTION_MACH_DEP 0x2000000      /* subsequent bits reserved for target */
 450 #define SECTION_EXCLUDE  0x4000000      /* discarded by the linker */
 451
 452 /* This SECTION_STYLE is used for unnamed sections that we can switch
 453    to using a special assembler directive.  */
 454 #define SECTION_UNNAMED  0x000000
 455
 456 /* This SECTION_STYLE is used for named sections that we can switch
 457    to using a general section directive.  */
 458 #define SECTION_NAMED    0x200000
 459
 460 /* This SECTION_STYLE is used for sections that we cannot switch to at
 461    all.  The choice of section is implied by the directive that we use
 462    to declare the object.  */
 463 #define SECTION_NOSWITCH 0x400000
 464
 465 /* A helper function for default_elf_select_section and
 466    default_elf_unique_section.  Categorizes the DECL.  */
 467
 468 enum section_category
 469 {
 470   SECCAT_TEXT,
 471
 472   SECCAT_RODATA,
 473   SECCAT_RODATA_MERGE_STR,
 474   SECCAT_RODATA_MERGE_STR_INIT,
 475   SECCAT_RODATA_MERGE_CONST,
 476   SECCAT_SRODATA,
 477
 478   SECCAT_DATA,
 479
 480   /* To optimize loading of shared programs, define following subsections
 481      of data section:
 482         _REL    Contains data that has relocations, so they get grouped
 483                 together and dynamic linker will visit fewer pages in memory.
 484         _RO     Contains data that is otherwise read-only.  This is useful
 485                 with prelinking as most relocations won't be dynamically
 486                 linked and thus stay read only.
 487         _LOCAL  Marks data containing relocations only to local objects.
 488                 These relocations will get fully resolved by prelinking.  */
 489   SECCAT_DATA_REL,
 490   SECCAT_DATA_REL_LOCAL,
 491   SECCAT_DATA_REL_RO,
 492   SECCAT_DATA_REL_RO_LOCAL,
 493
 494   SECCAT_SDATA,
 495   SECCAT_TDATA,
 496
 497   SECCAT_BSS,
 498   SECCAT_SBSS,
 499   SECCAT_TBSS
 500 };
 501
 502 /* Information that is provided by all instances of the section type.  */
 503 struct GTY(()) section_common {
 504   /* The set of SECTION_* flags that apply to this section.  */
 505   unsigned int flags;
 506 };
 507
 508 /* Information about a SECTION_NAMED section.  */
 509 struct GTY(()) named_section {
 510   struct section_common common;
 511
 512   /* The name of the section.  */
 513   const char *name;
 514
 515   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 516      section is associated.  */
 517   tree decl;
 518 };
 519
 520 /* A callback that writes the assembly code for switching to an unnamed
 521    section.  The argument provides callback-specific data.  */
 522 typedef void (*unnamed_section_callback) (const void *);
 523
 524 /* Information about a SECTION_UNNAMED section.  */
 525 struct GTY(()) unnamed_section {
 526   struct section_common common;
 527
 528   /* The callback used to switch to the section, and the data that
 529      should be passed to the callback.  */
 530   unnamed_section_callback GTY ((skip)) callback;
 531   const void *GTY ((skip)) data;
 532
 533   /* The next entry in the chain of unnamed sections.  */
 534   section *next;
 535 };
 536
 537 /* A callback that writes the assembly code for a decl in a
 538    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 539    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 540    in bytes and ROUNDED is that size rounded up to the next
 541    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 542
 543    Return true if the callback used DECL_ALIGN to set the object's
 544    alignment.  A false return value implies that we are relying
 545    on the rounded size to align the decl.  */
 546 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 547                                            unsigned HOST_WIDE_INT size,
 548                                            unsigned HOST_WIDE_INT rounded);
 549
 550 /* Information about a SECTION_NOSWITCH section.  */
 551 struct GTY(()) noswitch_section {
 552   struct section_common common;
 553
 554   /* The callback used to assemble decls in this section.  */
 555   noswitch_section_callback GTY ((skip)) callback;
 556 };
 557
 558 /* Information about a section, which may be named or unnamed.  */
 559 union GTY ((desc ("SECTION_STYLE (&(%h))"))) section {
 560   struct section_common GTY ((skip)) common;
 561   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 562   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 563   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 564 };
 565
 566 /* Return the style of section SECT.  */
 567 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 568
 569 struct object_block;
 570
 571 /* Special well-known sections.  */
 572 extern GTY(()) section *text_section;
 573 extern GTY(()) section *data_section;
 574 extern GTY(()) section *readonly_data_section;
 575 extern GTY(()) section *sdata_section;
 576 extern GTY(()) section *ctors_section;
 577 extern GTY(()) section *dtors_section;
 578 extern GTY(()) section *bss_section;
 579 extern GTY(()) section *sbss_section;
 580 extern GTY(()) section *exception_section;
 581 extern GTY(()) section *eh_frame_section;
 582 extern GTY(()) section *tls_comm_section;
 583 extern GTY(()) section *comm_section;
 584 extern GTY(()) section *lcomm_section;
 585 extern GTY(()) section *bss_noswitch_section;
 586
 587 extern GTY(()) section *in_section;
 588 extern GTY(()) bool in_cold_section_p;
 589
 590 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 591                                      const void *);
 592 extern section *get_section (const char *, unsigned int, tree);
 593 extern section *get_named_section (tree, const char *, int);
 594 extern section *get_variable_section (tree, bool);
 595 extern void place_block_symbol (rtx);
 596 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 597                                enum tls_model);
 598 extern section *mergeable_constant_section (enum machine_mode,
 599                                             unsigned HOST_WIDE_INT,
 600                                             unsigned int);
 601 extern section *function_section (tree);
 602 extern section *unlikely_text_section (void);
 603 extern section *current_function_section (void);
 604
 605 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
 606    not) section for PRIORITY.  */
 607 extern section *get_cdtor_priority_section (int, bool);
 608
 609 extern bool unlikely_text_section_p (section *);
 610 extern void switch_to_section (section *);
 611 extern void output_section_asm_op (const void *);
 612
 613 extern void record_tm_clone_pair (tree, tree);
 614 extern void finish_tm_clone_pairs (void);
 615 extern tree get_tm_clone_pair (tree);
 616
 617 extern void default_asm_output_source_filename (FILE *, const char *);
 618 extern void output_file_directive (FILE *, const char *);
 619
 620 extern unsigned int default_section_type_flags (tree, const char *, int);
 621
 622 extern bool have_global_bss_p (void);
 623 extern void default_no_named_section (const char *, unsigned int, tree);
 624 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 625 extern enum section_category categorize_decl_for_section (const_tree, int);
 626 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 627 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 628
 629 extern void default_stabs_asm_out_destructor (rtx, int);
 630 extern void default_named_section_asm_out_destructor (rtx, int);
 631 extern void default_dtor_section_asm_out_destructor (rtx, int);
 632 extern void default_stabs_asm_out_constructor (rtx, int);
 633 extern void default_named_section_asm_out_constructor (rtx, int);
 634 extern void default_ctor_section_asm_out_constructor (rtx, int);
 635
 636 extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
 637 extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
 638 extern void default_unique_section (tree, int);
 639 extern section *default_function_rodata_section (tree);
 640 extern section *default_no_function_rodata_section (tree);
 641 extern section *default_clone_table_section (void);
 642 extern section *default_select_rtx_section (enum machine_mode, rtx,
 643                                             unsigned HOST_WIDE_INT);
 644 extern section *default_elf_select_rtx_section (enum machine_mode, rtx,
 645                                                 unsigned HOST_WIDE_INT);
 646 extern void default_encode_section_info (tree, rtx, int);
 647 extern const char *default_strip_name_encoding (const char *);
 648 extern void default_asm_output_anchor (rtx);
 649 extern bool default_use_anchors_for_symbol_p (const_rtx);
 650 extern bool default_binds_local_p (const_tree);
 651 extern bool default_binds_local_p_1 (const_tree, int);
 652 extern void default_globalize_label (FILE *, const char *);
 653 extern void default_globalize_decl_name (FILE *, tree);
 654 extern void default_emit_unwind_label (FILE *, tree, int, int);
 655 extern void default_emit_except_table_label (FILE *);
 656 extern void default_generate_internal_label (char *, const char *,
 657                                              unsigned long);
 658 extern void default_internal_label (FILE *, const char *, unsigned long);
 659 extern void default_asm_declare_constant_name (FILE *, const char *,
 660                                                const_tree, HOST_WIDE_INT);
 661 extern void default_file_start (void);
 662 extern void file_end_indicate_exec_stack (void);
 663 extern void file_end_indicate_split_stack (void);
 664
 665 extern void default_elf_asm_output_external (FILE *file, tree,
 666                                              const char *);
 667 extern void default_elf_asm_output_limited_string (FILE *, const char *);
 668 extern void default_elf_asm_output_ascii (FILE *, const char *, unsigned int);
 669 extern void default_elf_internal_label (FILE *, const char *, unsigned long);
 670
 671 extern void default_elf_init_array_asm_out_constructor (rtx, int);
 672 extern void default_elf_fini_array_asm_out_destructor (rtx, int);
 673 extern int maybe_assemble_visibility (tree);
 674
 675 extern int default_address_cost (rtx, bool);
 676
 677 /* Output stack usage information.  */
 678 extern void output_stack_usage (void);
 679
 680 /* dbxout helper functions */
 681 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
 682
 683 extern void dbxout_int (int);
 684 extern void dbxout_stabd (int, int);
 685 extern void dbxout_begin_stabn (int);
 686 extern void dbxout_begin_stabn_sline (int);
 687 extern void dbxout_begin_empty_stabs (int);
 688 extern void dbxout_begin_simple_stabs (const char *, int);
 689 extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
 690
 691 extern void dbxout_stab_value_zero (void);
 692 extern void dbxout_stab_value_label (const char *);
 693 extern void dbxout_stab_value_label_diff (const char *, const char *);
 694 extern void dbxout_stab_value_internal_label (const char *, int *);
 695 extern void dbxout_stab_value_internal_label_diff (const char *, int *,
 696                                                    const char *);
 697
 698 #endif
 699
 700 #endif /* ! GCC_OUTPUT_H */