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 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 3, 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 COPYING3.  If not see
20<http://www.gnu.org/licenses/>.  */
21
22#ifndef GCC_OUTPUT_H
23#define GCC_OUTPUT_H
24
25/* Initialize data in final at the beginning of a compilation.  */
26extern void init_final (const char *);
27
28/* Enable APP processing of subsequent output.
29   Used before the output from an `asm' statement.  */
30extern void app_enable (void);
31
32/* Disable APP processing of subsequent output.
33   Called from varasm.c before most kinds of output.  */
34extern void app_disable (void);
35
36/* Return the number of slots filled in the current
37   delayed branch sequence (we don't count the insn needing the
38   delay slot).   Zero if not in a delayed branch sequence.  */
39extern int dbr_sequence_length (void);
40
41/* Indicate that branch shortening hasn't yet been done.  */
42extern void init_insn_lengths (void);
43
44/* Obtain the current length of an insn.  If branch shortening has been done,
45   get its actual length.  Otherwise, get its maximum length.  */
46extern int get_attr_length (rtx);
47
48/* Obtain the current length of an insn.  If branch shortening has been done,
49   get its actual length.  Otherwise, get its minimum length.  */
50extern int get_attr_min_length (rtx);
51
52/* Make a pass over all insns and compute their actual lengths by shortening
53   any branches of variable length if possible.  */
54extern void shorten_branches (rtx);
55
56/* Output assembler code for the start of a function,
57   and initialize some of the variables in this file
58   for the new function.  The label for the function and associated
59   assembler pseudo-ops have already been output in
60   `assemble_start_function'.  */
61extern void final_start_function (rtx, FILE *, int);
62
63/* Output assembler code for the end of a function.
64   For clarity, args are same as those of `final_start_function'
65   even though not all of them are needed.  */
66extern void final_end_function (void);
67
68/* Output assembler code for some insns: all or part of a function.  */
69extern void final (rtx, FILE *, int);
70
71/* The final scan for one insn, INSN.  Args are same as in `final', except
72   that INSN is the insn being scanned.  Value returned is the next insn to
73   be scanned.  */
74extern rtx final_scan_insn (rtx, FILE *, int, int, int *);
75
76/* Replace a SUBREG with a REG or a MEM, based on the thing it is a
77   subreg of.  */
78extern rtx alter_subreg (rtx *);
79
80/* Report inconsistency between the assembler template and the operands.
81   In an `asm', it's the user's fault; otherwise, the compiler's fault.  */
82extern void output_operand_lossage (const char *, ...) ATTRIBUTE_PRINTF_1;
83
84/* Output a string of assembler code, substituting insn operands.
85   Defined in final.c.  */
86extern void output_asm_insn (const char *, rtx *);
87
88/* Compute a worst-case reference address of a branch so that it
89   can be safely used in the presence of aligned labels.
90   Defined in final.c.  */
91extern int insn_current_reference_address (rtx);
92
93/* Find the alignment associated with a CODE_LABEL.
94   Defined in final.c.  */
95extern int label_to_alignment (rtx);
96
97/* Find the alignment maximum skip associated with a CODE_LABEL.
98   Defined in final.c.  */
99extern int label_to_max_skip (rtx);
100
101/* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol.  */
102extern void output_asm_label (rtx);
103
104/* Marks SYMBOL_REFs in x as referenced through use of assemble_external.  */
105extern void mark_symbol_refs_as_used (rtx);
106
107/* Print a memory reference operand for address X
108   using machine-dependent assembler syntax.  */
109extern void output_address (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.  */
114extern 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/* This is a magic identifier which allows GCC to figure out the type
121   of HOST_WIDE_INT for %wd specifier checks.  You must issue this
122   typedef before using the __asm_fprintf__ format attribute.  */
123typedef HOST_WIDE_INT __gcc_host_wide_int__;
124#else
125#define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
126#endif
127
128extern void asm_fprintf (FILE *file, const char *p, ...)
129     ATTRIBUTE_ASM_FPRINTF(2, 3);
130
131/* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
132   words.  */
133extern void split_double (rtx, rtx *, rtx *);
134
135/* Return nonzero if this function has no function calls.  */
136extern int leaf_function_p (void);
137
138/* Return 1 if branch is a forward branch.
139   Uses insn_shuid array, so it works only in the final pass.  May be used by
140   output templates to add branch prediction hints, for example.  */
141extern int final_forward_branch_p (rtx);
142
143/* Return 1 if this function uses only the registers that can be
144   safely renumbered.  */
145extern int only_leaf_regs_used (void);
146
147/* Scan IN_RTX and its subexpressions, and renumber all regs into those
148   available in leaf functions.  */
149extern void leaf_renumber_regs_insn (rtx);
150
151/* Locate the proper template for the given insn-code.  */
152extern const char *get_insn_template (int, rtx);
153
154/* Functions in varasm.c.  */
155
156/* Declare DECL to be a weak symbol.  */
157extern void declare_weak (tree);
158/* Merge weak status.  */
159extern void merge_weak (tree, tree);
160
161/* Emit any pending weak declarations.  */
162extern void weak_finish (void);
163
164/* Emit any pending emutls declarations and initializations.  */
165extern void emutls_finish (void);
166
167/* Decode an `asm' spec for a declaration as a register name.
168   Return the register number, or -1 if nothing specified,
169   or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
170   or -3 if ASMSPEC is `cc' and is not recognized,
171   or -4 if ASMSPEC is `memory' and is not recognized.
172   Accept an exact spelling or a decimal number.
173   Prefixes such as % are optional.  */
174extern int decode_reg_name (const char *);
175
176extern void assemble_alias (tree, tree);
177
178extern void default_assemble_visibility (tree, int);
179
180/* Output a string of literal assembler code
181   for an `asm' keyword used between functions.  */
182extern void assemble_asm (tree);
183
184/* Output assembler code for the constant pool of a function and associated
185   with defining the name of the function.  DECL describes the function.
186   NAME is the function's name.  For the constant pool, we use the current
187   constant pool data.  */
188extern void assemble_start_function (tree, const char *);
189
190/* Output assembler code associated with defining the size of the
191   function.  DECL describes the function.  NAME is the function's name.  */
192extern void assemble_end_function (tree, const char *);
193
194/* Assemble everything that is needed for a variable or function declaration.
195   Not used for automatic variables, and not used for function definitions.
196   Should not be called for variables of incomplete structure type.
197
198   TOP_LEVEL is nonzero if this variable has file scope.
199   AT_END is nonzero if this is the special handling, at end of compilation,
200   to define things that have had only tentative definitions.
201   DONT_OUTPUT_DATA if nonzero means don't actually output the
202   initial value (that will be done by the caller).  */
203extern void assemble_variable (tree, int, int, int);
204
205/* Compute the alignment of variable specified by DECL.
206   DONT_OUTPUT_DATA is from assemble_variable.  */
207extern void align_variable (tree decl, bool dont_output_data);
208
209/* Queue for outputting something to declare an external symbol to the
210   assembler.  (Most assemblers don't need this, so we normally output
211   nothing.)  Do nothing if DECL is not external.  */
212extern void assemble_external (tree);
213
214/* Assemble code to leave SIZE bytes of zeros.  */
215extern void assemble_zeros (unsigned HOST_WIDE_INT);
216
217/* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
218extern void assemble_align (int);
219
220/* Assemble a string constant with the specified C string as contents.  */
221extern void assemble_string (const char *, int);
222
223/* Similar, for calling a library function FUN.  */
224extern void assemble_external_libcall (rtx);
225
226/* Assemble a label named NAME.  */
227extern void assemble_label (const char *);
228
229/* Output to FILE (an assembly file) a reference to NAME.  If NAME
230   starts with a *, the rest of NAME is output verbatim.  Otherwise
231   NAME is transformed in a target-specific way (usually by the
232   addition of an underscore).  */
233extern void assemble_name_raw (FILE *, const char *);
234
235/* Like assemble_name_raw, but should be used when NAME might refer to
236   an entity that is also represented as a tree (like a function or
237   variable).  If NAME does refer to such an entity, that entity will
238   be marked as referenced.  */
239extern void assemble_name (FILE *, const char *);
240
241/* Return the assembler directive for creating a given kind of integer
242   object.  SIZE is the number of bytes in the object and ALIGNED_P
243   indicates whether it is known to be aligned.  Return NULL if the
244   assembly dialect has no such directive.
245
246   The returned string should be printed at the start of a new line and
247   be followed immediately by the object's initial value.  */
248extern const char *integer_asm_op (int, int);
249
250/* Use directive OP to assemble an integer object X.  Print OP at the
251   start of the line, followed immediately by the value of X.  */
252extern void assemble_integer_with_op (const char *, rtx);
253
254/* The default implementation of the asm_out.integer target hook.  */
255extern bool default_assemble_integer (rtx, unsigned int, int);
256
257/* Assemble the integer constant X into an object of SIZE bytes.  ALIGN is
258   the alignment of the integer in bits.  Return 1 if we were able to output
259   the constant, otherwise 0.  If FORCE is nonzero the constant must
260   be outputable. */
261extern bool assemble_integer (rtx, unsigned, unsigned, int);
262
263/* An interface to assemble_integer for the common case in which a value is
264   fully aligned and must be printed.  VALUE is the value of the integer
265   object and SIZE is the number of bytes it contains.  */
266#define assemble_aligned_integer(SIZE, VALUE) \
267  assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
268
269#ifdef REAL_VALUE_TYPE_SIZE
270/* Assemble the floating-point constant D into an object of size MODE.  */
271extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
272#endif
273
274/* Write the address of the entity given by SYMBOL to SEC.  */
275extern void assemble_addr_to_section (rtx, section *);
276
277/* Return the size of the constant pool.  */
278extern int get_pool_size (void);
279
280#ifdef HAVE_peephole
281extern rtx peephole (rtx);
282#endif
283
284extern void output_shared_constant_pool (void);
285
286extern void output_object_blocks (void);
287
288/* Whether a constructor CTOR is a valid static constant initializer if all
289   its elements are.  This used to be internal to initializer_constant_valid_p
290   and has been exposed to let other functions like categorize_ctor_elements
291   evaluate the property while walking a constructor for other purposes.  */
292
293extern bool constructor_static_from_elts_p (const_tree);
294
295/* Return nonzero if VALUE is a valid constant-valued expression
296   for use in initializing a static variable; one that can be an
297   element of a "constant" initializer.
298
299   Return null_pointer_node if the value is absolute;
300   if it is relocatable, return the variable that determines the relocation.
301   We assume that VALUE has been folded as much as possible;
302   therefore, we do not need to check for such things as
303   arithmetic-combinations of integers.  */
304extern tree initializer_constant_valid_p (tree, tree);
305
306/* Return true if VALUE is a valid constant-valued expression
307   for use in initializing a static bit-field; one that can be
308   an element of a "constant" initializer.  */
309extern bool initializer_constant_valid_for_bitfield_p (tree);
310
311/* Output assembler code for constant EXP to FILE, with no label.
312   This includes the pseudo-op such as ".int" or ".byte", and a newline.
313   Assumes output_addressed_constants has been done on EXP already.
314
315   Generate exactly SIZE bytes of assembler data, padding at the end
316   with zeros if necessary.  SIZE must always be specified.
317
318   ALIGN is the alignment in bits that may be assumed for the data.  */
319extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
320
321/* When outputting delayed branch sequences, this rtx holds the
322   sequence being output.  It is null when no delayed branch
323   sequence is being output, so it can be used as a test in the
324   insn output code.
325
326   This variable is defined  in final.c.  */
327extern rtx final_sequence;
328
329/* The line number of the beginning of the current function.  Various
330   md code needs this so that it can output relative linenumbers.  */
331
332#ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers.  */
333extern int sdb_begin_function_line;
334#endif
335
336/* File in which assembler code is being written.  */
337
338#ifdef BUFSIZ
339extern FILE *asm_out_file;
340#endif
341
342/* The first global object in the file.  */
343extern const char *first_global_object_name;
344
345/* The first weak object in the file.  */
346extern const char *weak_global_object_name;
347
348/* Nonzero if function being compiled doesn't contain any calls
349   (ignoring the prologue and epilogue).  This is set prior to
350   local register allocation and is valid for the remaining
351   compiler passes.  */
352
353extern int current_function_is_leaf;
354
355/* Nonzero if function being compiled doesn't modify the stack pointer
356   (ignoring the prologue and epilogue).  This is only valid after
357   pass_stack_ptr_mod has run.  */
358
359extern int current_function_sp_is_unchanging;
360
361/* Nonzero if the function being compiled is a leaf function which only
362   uses leaf registers.  This is valid after reload (specifically after
363   sched2) and is useful only if the port defines LEAF_REGISTERS.  */
364
365extern int current_function_uses_only_leaf_regs;
366
367/* Default file in which to dump debug output.  */
368
369#ifdef BUFSIZ
370extern FILE *dump_file;
371#endif
372
373/* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
374extern rtx current_insn_predicate;
375
376/* Last insn processed by final_scan_insn.  */
377extern rtx current_output_insn;
378
379/* Nonzero while outputting an `asm' with operands.
380   This means that inconsistencies are the user's fault, so don't die.
381   The precise value is the insn being output, to pass to error_for_asm.  */
382extern rtx this_is_asm_operands;
383
384/* Carry information from ASM_DECLARE_OBJECT_NAME
385   to ASM_FINISH_DECLARE_OBJECT.  */
386extern int size_directive_output;
387extern tree last_assemble_variable_decl;
388
389extern bool first_function_block_is_cold;
390
391/* Decide whether DECL needs to be in a writable section.
392   RELOC is the same as for SELECT_SECTION.  */
393extern bool decl_readonly_section (const_tree, int);
394
395/* This can be used to compute RELOC for the function above, when
396   given a constant expression.  */
397extern int compute_reloc_for_constant (tree);
398
399/* User label prefix in effect for this compilation.  */
400extern const char *user_label_prefix;
401
402/* Default target function prologue and epilogue assembler output.  */
403extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
404
405/* Default target hook that outputs nothing to a stream.  */
406extern void no_asm_to_stream (FILE *);
407
408/* Flags controlling properties of a section.  */
409#define SECTION_ENTSIZE	 0x000ff	/* entity size in section */
410#define SECTION_CODE	 0x00100	/* contains code */
411#define SECTION_WRITE	 0x00200	/* data is writable */
412#define SECTION_DEBUG	 0x00400	/* contains debug data */
413#define SECTION_LINKONCE 0x00800	/* is linkonce */
414#define SECTION_SMALL	 0x01000	/* contains "small data" */
415#define SECTION_BSS	 0x02000	/* contains zeros only */
416#define SECTION_FORGET	 0x04000	/* forget that we've entered the section */
417#define SECTION_MERGE	 0x08000	/* contains mergeable data */
418#define SECTION_STRINGS  0x10000	/* contains zero terminated strings without
419					   embedded zeros */
420#define SECTION_OVERRIDE 0x20000	/* allow override of default flags */
421#define SECTION_TLS	 0x40000	/* contains thread-local storage */
422#define SECTION_NOTYPE	 0x80000	/* don't output @progbits */
423#define SECTION_DECLARED 0x100000	/* section has been used */
424#define SECTION_STYLE_MASK 0x600000	/* bits used for SECTION_STYLE */
425#define SECTION_COMMON   0x800000	/* contains common data */
426#define SECTION_MACH_DEP 0x1000000	/* subsequent bits reserved for target */
427
428/* This SECTION_STYLE is used for unnamed sections that we can switch
429   to using a special assembler directive.  */
430#define SECTION_UNNAMED	 0x000000
431
432/* This SECTION_STYLE is used for named sections that we can switch
433   to using a general section directive.  */
434#define SECTION_NAMED	 0x200000
435
436/* This SECTION_STYLE is used for sections that we cannot switch to at
437   all.  The choice of section is implied by the directive that we use
438   to declare the object.  */
439#define SECTION_NOSWITCH 0x400000
440
441/* A helper function for default_elf_select_section and
442   default_elf_unique_section.  Categorizes the DECL.  */
443
444enum section_category
445{
446  SECCAT_TEXT,
447
448  SECCAT_RODATA,
449  SECCAT_RODATA_MERGE_STR,
450  SECCAT_RODATA_MERGE_STR_INIT,
451  SECCAT_RODATA_MERGE_CONST,
452  SECCAT_SRODATA,
453
454  SECCAT_DATA,
455
456  /* To optimize loading of shared programs, define following subsections
457     of data section:
458	_REL	Contains data that has relocations, so they get grouped
459		together and dynamic linker will visit fewer pages in memory.
460	_RO	Contains data that is otherwise read-only.  This is useful
461		with prelinking as most relocations won't be dynamically
462		linked and thus stay read only.
463	_LOCAL	Marks data containing relocations only to local objects.
464		These relocations will get fully resolved by prelinking.  */
465  SECCAT_DATA_REL,
466  SECCAT_DATA_REL_LOCAL,
467  SECCAT_DATA_REL_RO,
468  SECCAT_DATA_REL_RO_LOCAL,
469
470  SECCAT_SDATA,
471  SECCAT_TDATA,
472
473  SECCAT_BSS,
474  SECCAT_SBSS,
475  SECCAT_TBSS,
476
477  SECCAT_EMUTLS_VAR,
478  SECCAT_EMUTLS_TMPL
479};
480
481/* Information that is provided by all instances of the section type.  */
482struct GTY(()) section_common {
483  /* The set of SECTION_* flags that apply to this section.  */
484  unsigned int flags;
485};
486
487/* Information about a SECTION_NAMED section.  */
488struct GTY(()) named_section {
489  struct section_common common;
490
491  /* The name of the section.  */
492  const char *name;
493
494  /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
495     section is associated.  */
496  tree decl;
497};
498
499/* A callback that writes the assembly code for switching to an unnamed
500   section.  The argument provides callback-specific data.  */
501typedef void (*unnamed_section_callback) (const void *);
502
503/* Information about a SECTION_UNNAMED section.  */
504struct GTY(()) unnamed_section {
505  struct section_common common;
506
507  /* The callback used to switch to the section, and the data that
508     should be passed to the callback.  */
509  unnamed_section_callback GTY ((skip)) callback;
510  const void *GTY ((skip)) data;
511
512  /* The next entry in the chain of unnamed sections.  */
513  section *next;
514};
515
516/* A callback that writes the assembly code for a decl in a
517   SECTION_NOSWITCH section.  DECL is the decl that should be assembled
518   and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
519   in bytes and ROUNDED is that size rounded up to the next
520   BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
521
522   Return true if the callback used DECL_ALIGN to set the object's
523   alignment.  A false return value implies that we are relying
524   on the rounded size to align the decl.  */
525typedef bool (*noswitch_section_callback) (tree decl, const char *name,
526					   unsigned HOST_WIDE_INT size,
527					   unsigned HOST_WIDE_INT rounded);
528
529/* Information about a SECTION_NOSWITCH section.  */
530struct GTY(()) noswitch_section {
531  struct section_common common;
532
533  /* The callback used to assemble decls in this section.  */
534  noswitch_section_callback GTY ((skip)) callback;
535};
536
537/* Information about a section, which may be named or unnamed.  */
538union GTY ((desc ("SECTION_STYLE (&(%h))"))) section {
539  struct section_common GTY ((skip)) common;
540  struct named_section GTY ((tag ("SECTION_NAMED"))) named;
541  struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
542  struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
543};
544
545/* Return the style of section SECT.  */
546#define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
547
548struct object_block;
549
550/* Special well-known sections.  */
551extern GTY(()) section *text_section;
552extern GTY(()) section *data_section;
553extern GTY(()) section *readonly_data_section;
554extern GTY(()) section *sdata_section;
555extern GTY(()) section *ctors_section;
556extern GTY(()) section *dtors_section;
557extern GTY(()) section *bss_section;
558extern GTY(()) section *sbss_section;
559extern GTY(()) section *exception_section;
560extern GTY(()) section *eh_frame_section;
561extern GTY(()) section *tls_comm_section;
562extern GTY(()) section *comm_section;
563extern GTY(()) section *lcomm_section;
564extern GTY(()) section *bss_noswitch_section;
565
566extern GTY(()) section *in_section;
567extern GTY(()) bool in_cold_section_p;
568
569extern section *get_unnamed_section (unsigned int, void (*) (const void *),
570				     const void *);
571extern section *get_section (const char *, unsigned int, tree);
572extern section *get_named_section (tree, const char *, int);
573extern void place_block_symbol (rtx);
574extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
575			       enum tls_model);
576extern section *mergeable_constant_section (enum machine_mode,
577					    unsigned HOST_WIDE_INT,
578					    unsigned int);
579extern section *function_section (tree);
580extern section *unlikely_text_section (void);
581extern section *current_function_section (void);
582
583/* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
584   not) section for PRIORITY.  */
585extern section *get_cdtor_priority_section (int, bool);
586
587extern bool unlikely_text_section_p (section *);
588extern void switch_to_section (section *);
589extern void output_section_asm_op (const void *);
590
591extern unsigned int default_section_type_flags (tree, const char *, int);
592
593extern bool have_global_bss_p (void);
594extern void default_no_named_section (const char *, unsigned int, tree);
595extern void default_elf_asm_named_section (const char *, unsigned int, tree);
596extern enum section_category categorize_decl_for_section (const_tree, int);
597extern void default_coff_asm_named_section (const char *, unsigned int, tree);
598extern void default_pe_asm_named_section (const char *, unsigned int, tree);
599
600extern void default_stabs_asm_out_destructor (rtx, int);
601extern void default_named_section_asm_out_destructor (rtx, int);
602extern void default_dtor_section_asm_out_destructor (rtx, int);
603extern void default_stabs_asm_out_constructor (rtx, int);
604extern void default_named_section_asm_out_constructor (rtx, int);
605extern void default_ctor_section_asm_out_constructor (rtx, int);
606
607extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
608extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
609extern void default_unique_section (tree, int);
610extern section *default_function_rodata_section (tree);
611extern section *default_no_function_rodata_section (tree);
612extern section *default_select_rtx_section (enum machine_mode, rtx,
613					    unsigned HOST_WIDE_INT);
614extern section *default_elf_select_rtx_section (enum machine_mode, rtx,
615						unsigned HOST_WIDE_INT);
616extern void default_encode_section_info (tree, rtx, int);
617extern const char *default_strip_name_encoding (const char *);
618extern void default_asm_output_anchor (rtx);
619extern bool default_use_anchors_for_symbol_p (const_rtx);
620extern bool default_binds_local_p (const_tree);
621extern bool default_binds_local_p_1 (const_tree, int);
622extern void default_globalize_label (FILE *, const char *);
623extern void default_globalize_decl_name (FILE *, tree);
624extern void default_emit_unwind_label (FILE *, tree, int, int);
625extern void default_emit_except_table_label (FILE *);
626extern void default_internal_label (FILE *, const char *, unsigned long);
627extern void default_file_start (void);
628extern void file_end_indicate_exec_stack (void);
629
630extern void default_elf_asm_output_external (FILE *file, tree,
631					     const char *);
632extern int maybe_assemble_visibility (tree);
633
634extern int default_address_cost (rtx, bool);
635
636/* dbxout helper functions */
637#if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
638
639extern void dbxout_int (int);
640extern void dbxout_stabd (int, int);
641extern void dbxout_begin_stabn (int);
642extern void dbxout_begin_stabn_sline (int);
643extern void dbxout_begin_empty_stabs (int);
644extern void dbxout_begin_simple_stabs (const char *, int);
645extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
646
647extern void dbxout_stab_value_zero (void);
648extern void dbxout_stab_value_label (const char *);
649extern void dbxout_stab_value_label_diff (const char *, const char *);
650extern void dbxout_stab_value_internal_label (const char *, int *);
651extern void dbxout_stab_value_internal_label_diff (const char *, int *,
652						   const char *);
653
654#endif
655
656#endif /* ! GCC_OUTPUT_H */
657