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