gcc/output.h

   1 /* Declarations for insn-output.c and other code to write to asm_out_file.
   2    These functions are defined in final.c, and varasm.c.
   3    Copyright (C) 1987-2021 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GCC_OUTPUT_H
  22 #define GCC_OUTPUT_H
  23
  24 /* Initialize data in final at the beginning of a compilation.  */
  25 extern void init_final (const char *);
  26
  27 /* Enable APP processing of subsequent output.
  28    Used before the output from an `asm' statement.  */
  29 extern void app_enable (void);
  30
  31 /* Disable APP processing of subsequent output.
  32    Called from varasm.c before most kinds of output.  */
  33 extern void app_disable (void);
  34
  35 /* Return the number of slots filled in the current
  36    delayed branch sequence (we don't count the insn needing the
  37    delay slot).   Zero if not in a delayed branch sequence.  */
  38 extern int dbr_sequence_length (void);
  39
  40 /* Indicate that branch shortening hasn't yet been done.  */
  41 extern void init_insn_lengths (void);
  42
  43 /* Obtain the current length of an insn.  If branch shortening has been done,
  44    get its actual length.  Otherwise, get its maximum length.  */
  45 extern int get_attr_length (rtx_insn *);
  46
  47 /* Obtain the current length of an insn.  If branch shortening has been done,
  48    get its actual length.  Otherwise, get its minimum length.  */
  49 extern int get_attr_min_length (rtx_insn *);
  50
  51 /* Make a pass over all insns and compute their actual lengths by shortening
  52    any branches of variable length if possible.  */
  53 extern void shorten_branches (rtx_insn *);
  54
  55 const char *get_some_local_dynamic_name ();
  56
  57 /* Output assembler code for the start of a function,
  58    and initialize some of the variables in this file
  59    for the new function.  The label for the function and associated
  60    assembler pseudo-ops have already been output in
  61    `assemble_start_function'.  */
  62 extern void final_start_function (rtx_insn *, FILE *, int);
  63
  64 /* Output assembler code for the end of a function.
  65    For clarity, args are same as those of `final_start_function'
  66    even though not all of them are needed.  */
  67 extern void final_end_function (void);
  68
  69 /* Output assembler code for some insns: all or part of a function.  */
  70 extern void final (rtx_insn *, FILE *, int);
  71
  72 /* The final scan for one insn, INSN.  Args are same as in `final', except
  73    that INSN is the insn being scanned.  Value returned is the next insn to
  74    be scanned.  */
  75 extern rtx_insn *final_scan_insn (rtx_insn *, FILE *, int, int, int *);
  76
  77 /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
  78    subreg of.  */
  79 extern rtx alter_subreg (rtx *, bool);
  80
  81 /* Print an operand using machine-dependent assembler syntax.  */
  82 extern void output_operand (rtx, int);
  83
  84 /* Report inconsistency between the assembler template and the operands.
  85    In an `asm', it's the user's fault; otherwise, the compiler's fault.  */
  86 extern void output_operand_lossage (const char *, ...) ATTRIBUTE_PRINTF_1;
  87
  88 /* Output a string of assembler code, substituting insn operands.
  89    Defined in final.c.  */
  90 extern void output_asm_insn (const char *, rtx *);
  91
  92 /* Compute a worst-case reference address of a branch so that it
  93    can be safely used in the presence of aligned labels.
  94    Defined in final.c.  */
  95 extern int insn_current_reference_address (rtx_insn *);
  96
  97 /* Find the alignment associated with a CODE_LABEL.
  98    Defined in final.c.  */
  99 extern align_flags label_to_alignment (rtx);
 100
 101 /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol.  */
 102 extern void output_asm_label (rtx);
 103
 104 /* Marks SYMBOL_REFs in x as referenced through use of assemble_external.  */
 105 extern void mark_symbol_refs_as_used (rtx);
 106
 107 /* Print a memory reference operand for address X with access mode MODE
 108    using machine-dependent assembler syntax.  */
 109 extern void output_address (machine_mode, rtx);
 110
 111 /* Print an integer constant expression in assembler syntax.
 112    Addition and subtraction are the only arithmetic
 113    that may appear in these expressions.  */
 114 extern void output_addr_const (FILE *, rtx);
 115
 116 /* Output a string of assembler code, substituting numbers, strings
 117    and fixed syntactic prefixes.  */
 118 #if GCC_VERSION >= 3004
 119 #define ATTRIBUTE_ASM_FPRINTF(m, n) __attribute__ ((__format__ (__asm_fprintf__, m, n))) ATTRIBUTE_NONNULL(m)
 120 #else
 121 #define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
 122 #endif
 123
 124 extern void fprint_whex (FILE *, unsigned HOST_WIDE_INT);
 125 extern void fprint_ul (FILE *, unsigned long);
 126 extern int sprint_ul (char *, unsigned long);
 127
 128 extern void asm_fprintf (FILE *file, const char *p, ...)
 129      ATTRIBUTE_ASM_FPRINTF(2, 3);
 130
 131 /* Return nonzero if this function has no function calls.  */
 132 extern int leaf_function_p (void);
 133
 134 /* Return 1 if branch is a forward branch.
 135    Uses insn_shuid array, so it works only in the final pass.  May be used by
 136    output templates to add branch prediction hints, for example.  */
 137 extern int final_forward_branch_p (rtx_insn *);
 138
 139 /* Return 1 if this function uses only the registers that can be
 140    safely renumbered.  */
 141 extern int only_leaf_regs_used (void);
 142
 143 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
 144    available in leaf functions.  */
 145 extern void leaf_renumber_regs_insn (rtx);
 146
 147 /* Locate the proper template for the given insn-code.  */
 148 extern const char *get_insn_template (int, rtx_insn *);
 149
 150 /* Functions in varasm.c.  */
 151
 152 /* Emit any pending weak declarations.  */
 153 extern void weak_finish (void);
 154
 155 /* Decode an `asm' spec for a declaration as a register name.
 156    Return the register number, or -1 if nothing specified,
 157    or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
 158    or -3 if ASMSPEC is `cc' and is not recognized,
 159    or -4 if ASMSPEC is `memory' and is not recognized.
 160    Accept an exact spelling or a decimal number.
 161    Prefixes such as % are optional.  */
 162 extern int decode_reg_name (const char *);
 163
 164 /* Similar to decode_reg_name, but takes an extra parameter that is a
 165    pointer to the number of (internal) registers described by the
 166    external name.  */
 167 extern int decode_reg_name_and_count (const char *, int *);
 168
 169 extern void do_assemble_alias (tree, tree);
 170 extern void do_assemble_symver (tree, tree);
 171
 172 extern void default_assemble_visibility (tree, int);
 173
 174 /* Output a string of literal assembler code
 175    for an `asm' keyword used between functions.  */
 176 extern void assemble_asm (tree);
 177
 178 /* Get the function's name from a decl, as described by its RTL.  */
 179 extern const char *get_fnname_from_decl (tree);
 180
 181 /* Output assembler code for the constant pool of a function and associated
 182    with defining the name of the function.  DECL describes the function.
 183    NAME is the function's name.  For the constant pool, we use the current
 184    constant pool data.  */
 185 extern void assemble_start_function (tree, const char *);
 186
 187 /* Output assembler code associated with defining the size of the
 188    function.  DECL describes the function.  NAME is the function's name.  */
 189 extern void assemble_end_function (tree, const char *);
 190
 191 /* Assemble everything that is needed for a variable or function declaration.
 192    Not used for automatic variables, and not used for function definitions.
 193    Should not be called for variables of incomplete structure type.
 194
 195    TOP_LEVEL is nonzero if this variable has file scope.
 196    AT_END is nonzero if this is the special handling, at end of compilation,
 197    to define things that have had only tentative definitions.
 198    DONT_OUTPUT_DATA if nonzero means don't actually output the
 199    initial value (that will be done by the caller).  */
 200 extern void assemble_variable (tree, int, int, int);
 201
 202 /* Put the vtable verification constructor initialization function
 203    into the preinit array.  */
 204 extern void assemble_vtv_preinit_initializer (tree);
 205
 206 /* Assemble everything that is needed for a variable declaration that has
 207    no definition in the current translation unit.  */
 208 extern void assemble_undefined_decl (tree);
 209
 210 /* Compute the alignment of variable specified by DECL.
 211    DONT_OUTPUT_DATA is from assemble_variable.  */
 212 extern void align_variable (tree decl, bool dont_output_data);
 213
 214 /* Queue for outputting something to declare an external symbol to the
 215    assembler.  (Most assemblers don't need this, so we normally output
 216    nothing.)  Do nothing if DECL is not external.  */
 217 extern void assemble_external (tree);
 218
 219 /* Assemble code to leave SIZE bytes of zeros.  */
 220 extern void assemble_zeros (unsigned HOST_WIDE_INT);
 221
 222 /* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
 223 extern void assemble_align (unsigned int);
 224
 225 /* Assemble a string constant with the specified C string as contents.  */
 226 extern void assemble_string (const char *, int);
 227
 228 /* Similar, for calling a library function FUN.  */
 229 extern void assemble_external_libcall (rtx);
 230
 231 /* Assemble a label named NAME.  */
 232 extern void assemble_label (FILE *, const char *);
 233
 234 /* Output to FILE (an assembly file) a reference to NAME.  If NAME
 235    starts with a *, the rest of NAME is output verbatim.  Otherwise
 236    NAME is transformed in a target-specific way (usually by the
 237    addition of an underscore).  */
 238 extern void assemble_name_raw (FILE *, const char *);
 239
 240 /* Return NAME that should actually be emitted, looking through
 241    transparent aliases.  If NAME refers to an entity that is also
 242    represented as a tree (like a function or variable), mark the entity
 243    as referenced.  */
 244 extern const char *assemble_name_resolve (const char *);
 245
 246 /* Like assemble_name_raw, but should be used when NAME might refer to
 247    an entity that is also represented as a tree (like a function or
 248    variable).  If NAME does refer to such an entity, that entity will
 249    be marked as referenced.  */
 250 extern void assemble_name (FILE *, const char *);
 251
 252 /* Return the assembler directive for creating a given kind of integer
 253    object.  SIZE is the number of bytes in the object and ALIGNED_P
 254    indicates whether it is known to be aligned.  Return NULL if the
 255    assembly dialect has no such directive.
 256
 257    The returned string should be printed at the start of a new line and
 258    be followed immediately by the object's initial value.  */
 259 extern const char *integer_asm_op (int, int);
 260
 261 /* Use directive OP to assemble an integer object X.  Print OP at the
 262    start of the line, followed immediately by the value of X.  */
 263 extern void assemble_integer_with_op (const char *, rtx);
 264
 265 /* The default implementation of the asm_out.integer target hook.  */
 266 extern bool default_assemble_integer (rtx, unsigned int, int);
 267
 268 /* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
 269    the alignment of the integer in bits.  Return 1 if we were able to output
 270    the constant, otherwise 0.  If FORCE is nonzero the constant must
 271    be outputable. */
 272 extern bool assemble_integer (rtx, unsigned, unsigned, int);
 273
 274 /* Return section for TEXT_SECITON_NAME if DECL or DECL_SECTION_NAME (DECL)
 275    is NULL.  */
 276 extern section *get_named_text_section (tree, const char *, const char *);
 277
 278 /* An interface to assemble_integer for the common case in which a value is
 279    fully aligned and must be printed.  VALUE is the value of the integer
 280    object and SIZE is the number of bytes it contains.  */
 281 #define assemble_aligned_integer(SIZE, VALUE) \
 282   assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
 283
 284 /* Assemble the floating-point constant D into an object of size MODE.  ALIGN
 285    is the alignment of the constant in bits.  If REVERSE is true, D is output
 286    in reverse storage order.  */
 287 extern void assemble_real (REAL_VALUE_TYPE, scalar_float_mode, unsigned,
 288                            bool = false);
 289
 290 /* Write the address of the entity given by SYMBOL to SEC.  */
 291 extern void assemble_addr_to_section (rtx, section *);
 292
 293 /* Return TRUE if and only if the constant pool has no entries.  Note
 294    that even entries we might end up choosing not to emit are counted
 295    here, so there is the potential for missed optimizations.  */
 296 extern bool constant_pool_empty_p (void);
 297
 298 extern rtx_insn *peephole (rtx_insn *);
 299
 300 extern void output_shared_constant_pool (void);
 301
 302 extern void output_object_blocks (void);
 303
 304 extern void output_quoted_string (FILE *, const char *);
 305
 306 /* When outputting delayed branch sequences, this rtx holds the
 307    sequence being output.  It is null when no delayed branch
 308    sequence is being output, so it can be used as a test in the
 309    insn output code.
 310
 311    This variable is defined  in final.c.  */
 312 extern rtx_sequence *final_sequence;
 313
 314 /* File in which assembler code is being written.  */
 315
 316 #ifdef BUFSIZ
 317 extern FILE *asm_out_file;
 318 #endif
 319
 320 /* The first global object in the file.  */
 321 extern const char *first_global_object_name;
 322
 323 /* The first weak object in the file.  */
 324 extern const char *weak_global_object_name;
 325
 326 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
 327 extern rtx current_insn_predicate;
 328
 329 /* Last insn processed by final_scan_insn.  */
 330 extern rtx_insn *current_output_insn;
 331
 332 /* Nonzero while outputting an `asm' with operands.
 333    This means that inconsistencies are the user's fault, so don't die.
 334    The precise value is the insn being output, to pass to error_for_asm.  */
 335 extern const rtx_insn *this_is_asm_operands;
 336
 337 /* Carry information from ASM_DECLARE_OBJECT_NAME
 338    to ASM_FINISH_DECLARE_OBJECT.  */
 339 extern int size_directive_output;
 340 extern tree last_assemble_variable_decl;
 341
 342 extern bool first_function_block_is_cold;
 343
 344 /* Decide whether DECL needs to be in a writable section.
 345    RELOC is the same as for SELECT_SECTION.  */
 346 extern bool decl_readonly_section (const_tree, int);
 347
 348 /* This can be used to compute RELOC for the function above, when
 349    given a constant expression.  */
 350 extern int compute_reloc_for_constant (tree);
 351
 352 /* This can be used to compute RELOC for get_variable_section.  */
 353 extern int compute_reloc_for_var (tree);
 354
 355 /* User label prefix in effect for this compilation.  */
 356 extern const char *user_label_prefix;
 357
 358 /* Default target function prologue and epilogue assembler output.  */
 359 extern void default_function_pro_epilogue (FILE *);
 360
 361 /* Default target function switched text sections.  */
 362 extern void default_function_switched_text_sections (FILE *, tree, bool);
 363
 364 /* Default target hook that outputs nothing to a stream.  */
 365 extern void no_asm_to_stream (FILE *);
 366
 367 /* Flags controlling properties of a section.  */
 368 #define SECTION_ENTSIZE  0x000ff        /* entity size in section */
 369 #define SECTION_CODE     0x00100        /* contains code */
 370 #define SECTION_WRITE    0x00200        /* data is writable */
 371 #define SECTION_DEBUG    0x00400        /* contains debug data */
 372 #define SECTION_LINKONCE 0x00800        /* is linkonce */
 373 #define SECTION_SMALL    0x01000        /* contains "small data" */
 374 #define SECTION_BSS      0x02000        /* contains zeros only */
 375 #define SECTION_FORGET   0x04000        /* forget that we've entered the section */
 376 #define SECTION_MERGE    0x08000        /* contains mergeable data */
 377 #define SECTION_STRINGS  0x10000        /* contains zero terminated strings without
 378                                            embedded zeros */
 379 #define SECTION_OVERRIDE 0x20000        /* allow override of default flags */
 380 #define SECTION_TLS      0x40000        /* contains thread-local storage */
 381 #define SECTION_NOTYPE   0x80000        /* don't output @progbits */
 382 #define SECTION_DECLARED 0x100000       /* section has been used */
 383 #define SECTION_STYLE_MASK 0x600000     /* bits used for SECTION_STYLE */
 384 #define SECTION_COMMON   0x800000       /* contains common data */
 385 #define SECTION_RELRO    0x1000000      /* data is readonly after relocation processing */
 386 #define SECTION_EXCLUDE  0x2000000      /* discarded by the linker */
 387 #define SECTION_RETAIN   0x4000000      /* retained by the linker.  */
 388 #define SECTION_LINK_ORDER 0x8000000    /* section needs link-order.  */
 389
 390 /* NB: The maximum SECTION_MACH_DEP is 0x10000000 since AVR needs 4 bits
 391    in SECTION_MACH_DEP.  */
 392 #define SECTION_MACH_DEP 0x10000000     /* subsequent bits reserved for target */
 393
 394 /* This SECTION_STYLE is used for unnamed sections that we can switch
 395    to using a special assembler directive.  */
 396 #define SECTION_UNNAMED  0x000000
 397
 398 /* This SECTION_STYLE is used for named sections that we can switch
 399    to using a general section directive.  */
 400 #define SECTION_NAMED    0x200000
 401
 402 /* This SECTION_STYLE is used for sections that we cannot switch to at
 403    all.  The choice of section is implied by the directive that we use
 404    to declare the object.  */
 405 #define SECTION_NOSWITCH 0x400000
 406
 407 /* A helper function for default_elf_select_section and
 408    default_elf_unique_section.  Categorizes the DECL.  */
 409
 410 enum section_category
 411 {
 412   SECCAT_TEXT,
 413
 414   SECCAT_RODATA,
 415   SECCAT_RODATA_MERGE_STR,
 416   SECCAT_RODATA_MERGE_STR_INIT,
 417   SECCAT_RODATA_MERGE_CONST,
 418   SECCAT_SRODATA,
 419
 420   SECCAT_DATA,
 421
 422   /* To optimize loading of shared programs, define following subsections
 423      of data section:
 424         _REL    Contains data that has relocations, so they get grouped
 425                 together and dynamic linker will visit fewer pages in memory.
 426         _RO     Contains data that is otherwise read-only.  This is useful
 427                 with prelinking as most relocations won't be dynamically
 428                 linked and thus stay read only.
 429         _LOCAL  Marks data containing relocations only to local objects.
 430                 These relocations will get fully resolved by prelinking.  */
 431   SECCAT_DATA_REL,
 432   SECCAT_DATA_REL_LOCAL,
 433   SECCAT_DATA_REL_RO,
 434   SECCAT_DATA_REL_RO_LOCAL,
 435
 436   SECCAT_SDATA,
 437   SECCAT_TDATA,
 438
 439   SECCAT_BSS,
 440   SECCAT_SBSS,
 441   SECCAT_TBSS
 442 };
 443
 444 /* Information that is provided by all instances of the section type.  */
 445 struct GTY(()) section_common {
 446   /* The set of SECTION_* flags that apply to this section.  */
 447   unsigned int flags;
 448 };
 449
 450 /* Information about a SECTION_NAMED section.  */
 451 struct GTY(()) named_section {
 452   struct section_common common;
 453
 454   /* The name of the section.  */
 455   const char *name;
 456
 457   /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
 458      section is associated.  */
 459   tree decl;
 460 };
 461
 462 /* A callback that writes the assembly code for switching to an unnamed
 463    section.  The argument provides callback-specific data.  */
 464 typedef void (*unnamed_section_callback) (const void *);
 465
 466 /* Information about a SECTION_UNNAMED section.  */
 467 struct GTY(()) unnamed_section {
 468   struct section_common common;
 469
 470   /* The callback used to switch to the section, and the data that
 471      should be passed to the callback.  */
 472   unnamed_section_callback GTY ((skip)) callback;
 473   const void *GTY ((skip)) data;
 474
 475   /* The next entry in the chain of unnamed sections.  */
 476   section *next;
 477 };
 478
 479 /* A callback that writes the assembly code for a decl in a
 480    SECTION_NOSWITCH section.  DECL is the decl that should be assembled
 481    and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
 482    in bytes and ROUNDED is that size rounded up to the next
 483    BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
 484
 485    Return true if the callback used DECL_ALIGN to set the object's
 486    alignment.  A false return value implies that we are relying
 487    on the rounded size to align the decl.  */
 488 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
 489                                            unsigned HOST_WIDE_INT size,
 490                                            unsigned HOST_WIDE_INT rounded);
 491
 492 /* Information about a SECTION_NOSWITCH section.  */
 493 struct GTY(()) noswitch_section {
 494   struct section_common common;
 495
 496   /* The callback used to assemble decls in this section.  */
 497   noswitch_section_callback GTY ((skip)) callback;
 498 };
 499
 500 /* Information about a section, which may be named or unnamed.  */
 501 union GTY ((desc ("SECTION_STYLE (&(%h))"), for_user)) section {
 502   struct section_common GTY ((skip)) common;
 503   struct named_section GTY ((tag ("SECTION_NAMED"))) named;
 504   struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
 505   struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
 506 };
 507
 508 /* Return the style of section SECT.  */
 509 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
 510
 511 struct object_block;
 512
 513 /* Special well-known sections.  */
 514 extern GTY(()) section *text_section;
 515 extern GTY(()) section *data_section;
 516 extern GTY(()) section *readonly_data_section;
 517 extern GTY(()) section *sdata_section;
 518 extern GTY(()) section *ctors_section;
 519 extern GTY(()) section *dtors_section;
 520 extern GTY(()) section *bss_section;
 521 extern GTY(()) section *sbss_section;
 522 extern GTY(()) section *exception_section;
 523 extern GTY(()) section *eh_frame_section;
 524 extern GTY(()) section *tls_comm_section;
 525 extern GTY(()) section *comm_section;
 526 extern GTY(()) section *lcomm_section;
 527 extern GTY(()) section *bss_noswitch_section;
 528
 529 extern GTY(()) section *in_section;
 530 extern GTY(()) bool in_cold_section_p;
 531
 532 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
 533                                      const void *);
 534 extern section *get_section (const char *, unsigned int, tree,
 535                              bool not_existing = false);
 536 extern section *get_named_section (tree, const char *, int);
 537 extern section *get_variable_section (tree, bool);
 538 extern void place_block_symbol (rtx);
 539 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
 540                                enum tls_model);
 541 extern section *mergeable_constant_section (machine_mode,
 542                                             unsigned HOST_WIDE_INT,
 543                                             unsigned int);
 544 extern section *function_section (tree);
 545 extern section *unlikely_text_section (void);
 546 extern section *current_function_section (void);
 547 extern void switch_to_other_text_partition (void);
 548
 549 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
 550    not) section for PRIORITY.  */
 551 extern section *get_cdtor_priority_section (int, bool);
 552
 553 extern bool unlikely_text_section_p (section *);
 554 extern void switch_to_section (section *, tree = nullptr);
 555 extern void output_section_asm_op (const void *);
 556
 557 extern void record_tm_clone_pair (tree, tree);
 558 extern void finish_tm_clone_pairs (void);
 559 extern tree get_tm_clone_pair (tree);
 560
 561 extern void default_asm_output_source_filename (FILE *, const char *);
 562 extern void output_file_directive (FILE *, const char *);
 563
 564 extern unsigned int default_section_type_flags (tree, const char *, int);
 565
 566 extern bool have_global_bss_p (void);
 567 extern bool bss_initializer_p (const_tree, bool = false);
 568
 569 extern void default_no_named_section (const char *, unsigned int, tree);
 570 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
 571 extern enum section_category categorize_decl_for_section (const_tree, int);
 572 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
 573 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
 574
 575 extern void default_named_section_asm_out_destructor (rtx, int);
 576 extern void default_dtor_section_asm_out_destructor (rtx, int);
 577 extern void default_named_section_asm_out_constructor (rtx, int);
 578 extern void default_ctor_section_asm_out_constructor (rtx, int);
 579
 580 extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
 581 extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
 582 extern void default_unique_section (tree, int);
 583 extern section *default_function_rodata_section (tree, bool);
 584 extern section *default_no_function_rodata_section (tree, bool);
 585 extern section *default_clone_table_section (void);
 586 extern section *default_select_rtx_section (machine_mode, rtx,
 587                                             unsigned HOST_WIDE_INT);
 588 extern section *default_elf_select_rtx_section (machine_mode, rtx,
 589                                                 unsigned HOST_WIDE_INT);
 590 extern void default_encode_section_info (tree, rtx, int);
 591 extern const char *default_strip_name_encoding (const char *);
 592 extern void default_asm_output_anchor (rtx);
 593 extern bool default_use_anchors_for_symbol_p (const_rtx);
 594 extern bool default_binds_local_p (const_tree);
 595 extern bool default_binds_local_p_1 (const_tree, int);
 596 extern bool default_binds_local_p_2 (const_tree);
 597 extern bool default_binds_local_p_3 (const_tree, bool, bool, bool, bool);
 598 extern void default_globalize_label (FILE *, const char *);
 599 extern void default_globalize_decl_name (FILE *, tree);
 600 extern void default_emit_unwind_label (FILE *, tree, int, int);
 601 extern void default_emit_except_table_label (FILE *);
 602 extern void default_generate_internal_label (char *, const char *,
 603                                              unsigned long);
 604 extern void default_internal_label (FILE *, const char *, unsigned long);
 605 extern void default_asm_declare_constant_name (FILE *, const char *,
 606                                                const_tree, HOST_WIDE_INT);
 607 extern void default_file_start (void);
 608 extern void file_end_indicate_exec_stack (void);
 609 extern void file_end_indicate_split_stack (void);
 610
 611 extern void default_elf_asm_output_external (FILE *file, tree,
 612                                              const char *);
 613 extern void default_elf_asm_output_limited_string (FILE *, const char *);
 614 extern void default_elf_asm_output_ascii (FILE *, const char *, unsigned int);
 615 extern void default_elf_internal_label (FILE *, const char *, unsigned long);
 616
 617 extern void default_elf_init_array_asm_out_constructor (rtx, int);
 618 extern void default_elf_fini_array_asm_out_destructor (rtx, int);
 619 extern int maybe_assemble_visibility (tree);
 620
 621 extern int default_address_cost (rtx, machine_mode, addr_space_t, bool);
 622
 623 /* Stack usage.  */
 624 extern void output_stack_usage (void);
 625
 626 #endif /* ! GCC_OUTPUT_H */