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