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, 4 1999, 2000, 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. 5 6This file is part of GCC. 7 8GCC is free software; you can redistribute it and/or modify it under 9the terms of the GNU General Public License as published by the Free 10Software Foundation; either version 2, or (at your option) any later 11version. 12 13GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14WARRANTY; without even the implied warranty of MERCHANTABILITY or 15FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16for more details. 17 18You should have received a copy of the GNU General Public License 19along with GCC; see the file COPYING. If not, write to the Free 20Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 2102110-1301, USA. */ 22 23#ifndef GCC_OUTPUT_H 24#define GCC_OUTPUT_H 25 26/* Initialize data in final at the beginning of a compilation. */ 27extern void init_final (const char *); 28 29/* Enable APP processing of subsequent output. 30 Used before the output from an `asm' statement. */ 31extern void app_enable (void); 32 33/* Disable APP processing of subsequent output. 34 Called from varasm.c before most kinds of output. */ 35extern 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. */ 40extern int dbr_sequence_length (void); 41 42/* Indicate that branch shortening hasn't yet been done. */ 43extern 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. */ 47extern 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. */ 51extern 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. */ 55extern 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'. */ 62extern 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. */ 67extern void final_end_function (void); 68 69/* Output assembler code for some insns: all or part of a function. */ 70extern 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. */ 75extern 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. */ 79extern rtx alter_subreg (rtx *); 80 81/* Report inconsistency between the assembler template and the operands. 82 In an `asm', it's the user's fault; otherwise, the compiler's fault. */ 83extern void output_operand_lossage (const char *, ...) ATTRIBUTE_PRINTF_1; 84 85/* Output a string of assembler code, substituting insn operands. 86 Defined in final.c. */ 87extern void output_asm_insn (const char *, rtx *); 88 89/* Compute a worst-case reference address of a branch so that it 90 can be safely used in the presence of aligned labels. 91 Defined in final.c. */ 92extern int insn_current_reference_address (rtx); 93 94/* Find the alignment associated with a CODE_LABEL. 95 Defined in final.c. */ 96extern int label_to_alignment (rtx); 97 98/* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol. */ 99extern void output_asm_label (rtx); 100 101/* Print a memory reference operand for address X 102 using machine-dependent assembler syntax. */ 103extern void output_address (rtx); 104 105/* Print an integer constant expression in assembler syntax. 106 Addition and subtraction are the only arithmetic 107 that may appear in these expressions. */ 108extern void output_addr_const (FILE *, rtx); 109 110/* Output a string of assembler code, substituting numbers, strings 111 and fixed syntactic prefixes. */ 112#if GCC_VERSION >= 3004 && !defined(__clang__) 113#define ATTRIBUTE_ASM_FPRINTF(m, n) __attribute__ ((__format__ (__asm_fprintf__, m, n))) ATTRIBUTE_NONNULL(m) 114/* This is a magic identifier which allows GCC to figure out the type 115 of HOST_WIDE_INT for %wd specifier checks. You must issue this 116 typedef before using the __asm_fprintf__ format attribute. */ 117typedef HOST_WIDE_INT __gcc_host_wide_int__; 118#else 119/* FIXME(benl): what about %wd? */ 120#define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m) 121#endif 122 123extern void asm_fprintf (FILE *file, const char *p, ...) 124 ATTRIBUTE_ASM_FPRINTF(2, 3); 125 126/* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single 127 words. */ 128extern void split_double (rtx, rtx *, rtx *); 129 130/* Return nonzero if this function has no function calls. */ 131extern int leaf_function_p (void); 132 133/* Return 1 if branch is a forward branch. 134 Uses insn_shuid array, so it works only in the final pass. May be used by 135 output templates to add branch prediction hints, for example. */ 136extern int final_forward_branch_p (rtx); 137 138/* Return 1 if this function uses only the registers that can be 139 safely renumbered. */ 140extern int only_leaf_regs_used (void); 141 142/* Scan IN_RTX and its subexpressions, and renumber all regs into those 143 available in leaf functions. */ 144extern void leaf_renumber_regs_insn (rtx); 145 146/* Locate the proper template for the given insn-code. */ 147extern const char *get_insn_template (int, rtx); 148 149/* Functions in flow.c */ 150extern int regno_clobbered_at_setjmp (int); 151 152/* Functions in varasm.c. */ 153 154/* Declare DECL to be a weak symbol. */ 155extern void declare_weak (tree); 156/* Merge weak status. */ 157extern void merge_weak (tree, tree); 158 159/* Emit any pending weak declarations. */ 160extern void weak_finish (void); 161 162/* Decode an `asm' spec for a declaration as a register name. 163 Return the register number, or -1 if nothing specified, 164 or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized, 165 or -3 if ASMSPEC is `cc' and is not recognized, 166 or -4 if ASMSPEC is `memory' and is not recognized. 167 Accept an exact spelling or a decimal number. 168 Prefixes such as % are optional. */ 169extern int decode_reg_name (const char *); 170 171extern void assemble_alias (tree, tree); 172 173extern void default_assemble_visibility (tree, int); 174 175/* Output a string of literal assembler code 176 for an `asm' keyword used between functions. */ 177extern void assemble_asm (tree); 178 179/* Output assembler code for the constant pool of a function and associated 180 with defining the name of the function. DECL describes the function. 181 NAME is the function's name. For the constant pool, we use the current 182 constant pool data. */ 183extern void assemble_start_function (tree, const char *); 184 185/* Output assembler code associated with defining the size of the 186 function. DECL describes the function. NAME is the function's name. */ 187extern void assemble_end_function (tree, const char *); 188 189/* Assemble everything that is needed for a variable or function declaration. 190 Not used for automatic variables, and not used for function definitions. 191 Should not be called for variables of incomplete structure type. 192 193 TOP_LEVEL is nonzero if this variable has file scope. 194 AT_END is nonzero if this is the special handling, at end of compilation, 195 to define things that have had only tentative definitions. 196 DONT_OUTPUT_DATA if nonzero means don't actually output the 197 initial value (that will be done by the caller). */ 198extern void assemble_variable (tree, int, int, int); 199 200/* Compute the alignment of variable specified by DECL. 201 DONT_OUTPUT_DATA is from assemble_variable. */ 202extern void align_variable (tree decl, bool dont_output_data); 203 204/* Queue for outputing something to declare an external symbol to the 205 assembler. (Most assemblers don't need this, so we normally output 206 nothing.) Do nothing if DECL is not external. */ 207extern void assemble_external (tree); 208 209/* Assemble code to leave SIZE bytes of zeros. */ 210extern void assemble_zeros (unsigned HOST_WIDE_INT); 211 212/* Assemble an alignment pseudo op for an ALIGN-bit boundary. */ 213extern void assemble_align (int); 214 215/* Assemble a string constant with the specified C string as contents. */ 216extern void assemble_string (const char *, int); 217 218/* Similar, for calling a library function FUN. */ 219extern void assemble_external_libcall (rtx); 220 221/* Assemble a label named NAME. */ 222extern void assemble_label (const char *); 223 224/* Output to FILE (an assembly file) a reference to NAME. If NAME 225 starts with a *, the rest of NAME is output verbatim. Otherwise 226 NAME is transformed in a target-specific way (usually by the 227 addition of an underscore). */ 228extern void assemble_name_raw (FILE *, const char *); 229 230/* Like assemble_name_raw, but should be used when NAME might refer to 231 an entity that is also represented as a tree (like a function or 232 variable). If NAME does refer to such an entity, that entity will 233 be marked as referenced. */ 234extern void assemble_name (FILE *, const char *); 235 236/* Return the assembler directive for creating a given kind of integer 237 object. SIZE is the number of bytes in the object and ALIGNED_P 238 indicates whether it is known to be aligned. Return NULL if the 239 assembly dialect has no such directive. 240 241 The returned string should be printed at the start of a new line and 242 be followed immediately by the object's initial value. */ 243extern const char *integer_asm_op (int, int); 244 245/* Use directive OP to assemble an integer object X. Print OP at the 246 start of the line, followed immediately by the value of X. */ 247extern void assemble_integer_with_op (const char *, rtx); 248 249/* The default implementation of the asm_out.integer target hook. */ 250extern bool default_assemble_integer (rtx, unsigned int, int); 251 252/* Assemble the integer constant X into an object of SIZE bytes. ALIGN is 253 the alignment of the integer in bits. Return 1 if we were able to output 254 the constant, otherwise 0. If FORCE is nonzero the constant must 255 be outputable. */ 256extern bool assemble_integer (rtx, unsigned, unsigned, int); 257 258/* An interface to assemble_integer for the common case in which a value is 259 fully aligned and must be printed. VALUE is the value of the integer 260 object and SIZE is the number of bytes it contains. */ 261#define assemble_aligned_integer(SIZE, VALUE) \ 262 assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1) 263 264#ifdef REAL_VALUE_TYPE_SIZE 265/* Assemble the floating-point constant D into an object of size MODE. */ 266extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned); 267#endif 268 269/* Return the size of the constant pool. */ 270extern int get_pool_size (void); 271 272#ifdef HAVE_peephole 273extern rtx peephole (rtx); 274#endif 275 276extern void output_shared_constant_pool (void); 277 278extern void output_object_blocks (void); 279 280/* Whether a constructor CTOR is a valid static constant initializer if all 281 its elements are. This used to be internal to initializer_constant_valid_p 282 and has been exposed to let other functions like categorize_ctor_elements 283 evaluate the property while walking a constructor for other purposes. */ 284 285extern bool constructor_static_from_elts_p (tree); 286 287/* Return nonzero if VALUE is a valid constant-valued expression 288 for use in initializing a static variable; one that can be an 289 element of a "constant" initializer. 290 291 Return null_pointer_node if the value is absolute; 292 if it is relocatable, return the variable that determines the relocation. 293 We assume that VALUE has been folded as much as possible; 294 therefore, we do not need to check for such things as 295 arithmetic-combinations of integers. */ 296extern tree initializer_constant_valid_p (tree, tree); 297 298/* Output assembler code for constant EXP to FILE, with no label. 299 This includes the pseudo-op such as ".int" or ".byte", and a newline. 300 Assumes output_addressed_constants has been done on EXP already. 301 302 Generate exactly SIZE bytes of assembler data, padding at the end 303 with zeros if necessary. SIZE must always be specified. 304 305 ALIGN is the alignment in bits that may be assumed for the data. */ 306extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int); 307 308/* When outputting delayed branch sequences, this rtx holds the 309 sequence being output. It is null when no delayed branch 310 sequence is being output, so it can be used as a test in the 311 insn output code. 312 313 This variable is defined in final.c. */ 314extern rtx final_sequence; 315 316/* The line number of the beginning of the current function. Various 317 md code needs this so that it can output relative linenumbers. */ 318 319#ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers. */ 320extern int sdb_begin_function_line; 321#endif 322 323/* File in which assembler code is being written. */ 324 325#ifdef BUFSIZ 326extern FILE *asm_out_file; 327#endif 328 329/* The first global object in the file. */ 330extern const char *first_global_object_name; 331 332/* The first weak object in the file. */ 333extern const char *weak_global_object_name; 334 335/* Nonzero if function being compiled doesn't contain any calls 336 (ignoring the prologue and epilogue). This is set prior to 337 local register allocation and is valid for the remaining 338 compiler passes. */ 339 340extern int current_function_is_leaf; 341 342/* Nonzero if function being compiled doesn't modify the stack pointer 343 (ignoring the prologue and epilogue). This is only valid after 344 life_analysis has run. */ 345 346extern int current_function_sp_is_unchanging; 347 348/* Nonzero if the function being compiled is a leaf function which only 349 uses leaf registers. This is valid after reload (specifically after 350 sched2) and is useful only if the port defines LEAF_REGISTERS. */ 351 352extern int current_function_uses_only_leaf_regs; 353 354/* Default file in which to dump debug output. */ 355 356#ifdef BUFSIZ 357extern FILE *dump_file; 358#endif 359 360/* Nonnull if the insn currently being emitted was a COND_EXEC pattern. */ 361extern rtx current_insn_predicate; 362 363/* Last insn processed by final_scan_insn. */ 364extern rtx current_output_insn; 365 366/* Nonzero while outputting an `asm' with operands. 367 This means that inconsistencies are the user's fault, so don't die. 368 The precise value is the insn being output, to pass to error_for_asm. */ 369extern rtx this_is_asm_operands; 370 371/* Carry information from ASM_DECLARE_OBJECT_NAME 372 to ASM_FINISH_DECLARE_OBJECT. */ 373extern int size_directive_output; 374extern tree last_assemble_variable_decl; 375 376extern bool first_function_block_is_cold; 377 378/* Decide whether DECL needs to be in a writable section. 379 RELOC is the same as for SELECT_SECTION. */ 380extern bool decl_readonly_section (tree, int); 381 382/* This can be used to compute RELOC for the function above, when 383 given a constant expression. */ 384extern int compute_reloc_for_constant (tree); 385 386/* User label prefix in effect for this compilation. */ 387extern const char *user_label_prefix; 388 389/* Default target function prologue and epilogue assembler output. */ 390extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT); 391 392/* Default target hook that outputs nothing to a stream. */ 393extern void no_asm_to_stream (FILE *); 394 395/* Flags controlling properties of a section. */ 396#define SECTION_ENTSIZE 0x000ff /* entity size in section */ 397#define SECTION_CODE 0x00100 /* contains code */ 398#define SECTION_WRITE 0x00200 /* data is writable */ 399#define SECTION_DEBUG 0x00400 /* contains debug data */ 400#define SECTION_LINKONCE 0x00800 /* is linkonce */ 401#define SECTION_SMALL 0x01000 /* contains "small data" */ 402#define SECTION_BSS 0x02000 /* contains zeros only */ 403#define SECTION_FORGET 0x04000 /* forget that we've entered the section */ 404#define SECTION_MERGE 0x08000 /* contains mergeable data */ 405#define SECTION_STRINGS 0x10000 /* contains zero terminated strings without 406 embedded zeros */ 407#define SECTION_OVERRIDE 0x20000 /* allow override of default flags */ 408#define SECTION_TLS 0x40000 /* contains thread-local storage */ 409#define SECTION_NOTYPE 0x80000 /* don't output @progbits */ 410#define SECTION_DECLARED 0x100000 /* section has been used */ 411#define SECTION_STYLE_MASK 0x600000 /* bits used for SECTION_STYLE */ 412#define SECTION_COMMON 0x800000 /* contains common data */ 413#define SECTION_MACH_DEP 0x1000000 /* subsequent bits reserved for target */ 414 415/* This SECTION_STYLE is used for unnamed sections that we can switch 416 to using a special assembler directive. */ 417#define SECTION_UNNAMED 0x000000 418 419/* This SECTION_STYLE is used for named sections that we can switch 420 to using a general section directive. */ 421#define SECTION_NAMED 0x200000 422 423/* This SECTION_STYLE is used for sections that we cannot switch to at 424 all. The choice of section is implied by the directive that we use 425 to declare the object. */ 426#define SECTION_NOSWITCH 0x400000 427 428/* A helper function for default_elf_select_section and 429 default_elf_unique_section. Categorizes the DECL. */ 430 431enum section_category 432{ 433 SECCAT_TEXT, 434 435 SECCAT_RODATA, 436 SECCAT_RODATA_MERGE_STR, 437 SECCAT_RODATA_MERGE_STR_INIT, 438 SECCAT_RODATA_MERGE_CONST, 439 SECCAT_SRODATA, 440 441 SECCAT_DATA, 442 443 /* To optimize loading of shared programs, define following subsections 444 of data section: 445 _REL Contains data that has relocations, so they get grouped 446 together and dynamic linker will visit fewer pages in memory. 447 _RO Contains data that is otherwise read-only. This is useful 448 with prelinking as most relocations won't be dynamically 449 linked and thus stay read only. 450 _LOCAL Marks data containing relocations only to local objects. 451 These relocations will get fully resolved by prelinking. */ 452 SECCAT_DATA_REL, 453 SECCAT_DATA_REL_LOCAL, 454 SECCAT_DATA_REL_RO, 455 SECCAT_DATA_REL_RO_LOCAL, 456 457 SECCAT_SDATA, 458 SECCAT_TDATA, 459 460 SECCAT_BSS, 461 SECCAT_SBSS, 462 SECCAT_TBSS 463}; 464 465/* Information that is provided by all instances of the section type. */ 466struct section_common GTY(()) { 467 /* The set of SECTION_* flags that apply to this section. */ 468 unsigned int flags; 469}; 470 471/* Information about a SECTION_NAMED section. */ 472struct named_section GTY(()) { 473 struct section_common common; 474 475 /* The name of the section. */ 476 const char *name; 477 478 /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the 479 section is associated. */ 480 tree decl; 481}; 482 483/* A callback that writes the assembly code for switching to an unnamed 484 section. The argument provides callback-specific data. */ 485typedef void (*unnamed_section_callback) (const void *); 486 487/* Information about a SECTION_UNNAMED section. */ 488struct unnamed_section GTY(()) { 489 struct section_common common; 490 491 /* The callback used to switch to the section, and the data that 492 should be passed to the callback. */ 493 unnamed_section_callback GTY ((skip)) callback; 494 const void *GTY ((skip)) data; 495 496 /* The next entry in the chain of unnamed sections. */ 497 section *next; 498}; 499 500/* A callback that writes the assembly code for a decl in a 501 SECTION_NOSWITCH section. DECL is the decl that should be assembled 502 and NAME is the name of its SYMBOL_REF. SIZE is the size of the decl 503 in bytes and ROUNDED is that size rounded up to the next 504 BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary. 505 506 Return true if the callback used DECL_ALIGN to set the object's 507 alignment. A false return value implies that we are relying 508 on the rounded size to align the decl. */ 509typedef bool (*noswitch_section_callback) (tree decl, const char *name, 510 unsigned HOST_WIDE_INT size, 511 unsigned HOST_WIDE_INT rounded); 512 513/* Information about a SECTION_NOSWITCH section. */ 514struct noswitch_section GTY(()) { 515 struct section_common common; 516 517 /* The callback used to assemble decls in this section. */ 518 noswitch_section_callback GTY ((skip)) callback; 519}; 520 521/* Information about a section, which may be named or unnamed. */ 522union section GTY ((desc ("SECTION_STYLE (&(%h))"))) 523{ 524 struct section_common GTY ((skip)) common; 525 struct named_section GTY ((tag ("SECTION_NAMED"))) named; 526 struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed; 527 struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch; 528}; 529 530/* Return the style of section SECT. */ 531#define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK) 532 533struct object_block; 534 535/* Special well-known sections. */ 536extern GTY(()) section *text_section; 537extern GTY(()) section *data_section; 538extern GTY(()) section *readonly_data_section; 539extern GTY(()) section *sdata_section; 540extern GTY(()) section *ctors_section; 541extern GTY(()) section *dtors_section; 542extern GTY(()) section *bss_section; 543extern GTY(()) section *sbss_section; 544extern GTY(()) section *exception_section; 545extern GTY(()) section *eh_frame_section; 546extern GTY(()) section *tls_comm_section; 547extern GTY(()) section *comm_section; 548extern GTY(()) section *lcomm_section; 549extern GTY(()) section *bss_noswitch_section; 550 551extern GTY(()) section *in_section; 552extern GTY(()) bool in_cold_section_p; 553 554extern section *get_unnamed_section (unsigned int, void (*) (const void *), 555 const void *); 556extern section *get_section (const char *, unsigned int, tree); 557extern section *get_named_section (tree, const char *, int); 558extern void place_block_symbol (rtx); 559extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT, 560 enum tls_model); 561extern section *mergeable_constant_section (enum machine_mode, 562 unsigned HOST_WIDE_INT, 563 unsigned int); 564extern section *function_section (tree); 565extern section *unlikely_text_section (void); 566extern section *current_function_section (void); 567 568extern bool unlikely_text_section_p (section *); 569extern void switch_to_section (section *); 570extern void output_section_asm_op (const void *); 571 572extern unsigned int default_section_type_flags (tree, const char *, int); 573 574extern bool have_global_bss_p (void); 575extern void default_no_named_section (const char *, unsigned int, tree); 576extern void default_elf_asm_named_section (const char *, unsigned int, tree); 577extern enum section_category categorize_decl_for_section (tree, int); 578extern void default_coff_asm_named_section (const char *, unsigned int, tree); 579extern void default_pe_asm_named_section (const char *, unsigned int, tree); 580 581extern void default_stabs_asm_out_destructor (rtx, int); 582extern void default_named_section_asm_out_destructor (rtx, int); 583extern void default_dtor_section_asm_out_destructor (rtx, int); 584extern void default_stabs_asm_out_constructor (rtx, int); 585extern void default_named_section_asm_out_constructor (rtx, int); 586extern void default_ctor_section_asm_out_constructor (rtx, int); 587 588extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT); 589extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT); 590extern void default_unique_section (tree, int); 591extern section *default_function_rodata_section (tree); 592extern section *default_no_function_rodata_section (tree); 593extern section *default_select_rtx_section (enum machine_mode, rtx, 594 unsigned HOST_WIDE_INT); 595extern section *default_elf_select_rtx_section (enum machine_mode, rtx, 596 unsigned HOST_WIDE_INT); 597extern void default_encode_section_info (tree, rtx, int); 598extern const char *default_strip_name_encoding (const char *); 599extern void default_asm_output_anchor (rtx); 600extern bool default_use_anchors_for_symbol_p (rtx); 601extern bool default_binds_local_p (tree); 602extern bool default_binds_local_p_1 (tree, int); 603extern void default_globalize_label (FILE *, const char *); 604extern void default_emit_unwind_label (FILE *, tree, int, int); 605extern void default_emit_except_table_label (FILE *); 606extern void default_internal_label (FILE *, const char *, unsigned long); 607extern void default_file_start (void); 608extern void file_end_indicate_exec_stack (void); 609extern bool default_valid_pointer_mode (enum machine_mode); 610 611extern void default_elf_asm_output_external (FILE *file, tree, 612 const char *); 613extern int maybe_assemble_visibility (tree); 614 615extern int default_address_cost (rtx); 616 617/* dbxout helper functions */ 618#if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO 619 620extern void dbxout_int (int); 621extern void dbxout_stabd (int, int); 622extern void dbxout_begin_stabn (int); 623extern void dbxout_begin_stabn_sline (int); 624extern void dbxout_begin_empty_stabs (int); 625extern void dbxout_begin_simple_stabs (const char *, int); 626extern void dbxout_begin_simple_stabs_desc (const char *, int, int); 627 628extern void dbxout_stab_value_zero (void); 629extern void dbxout_stab_value_label (const char *); 630extern void dbxout_stab_value_label_diff (const char *, const char *); 631extern void dbxout_stab_value_internal_label (const char *, int *); 632extern void dbxout_stab_value_internal_label_diff (const char *, int *, 633 const char *); 634 635#endif 636 637#endif /* ! GCC_OUTPUT_H */ 638