1227825Stheraven/* Declarations for insn-output.c and other code to write to asm_out_file.
2227825Stheraven   These functions are defined in final.c, and varasm.c.
3227825Stheraven   Copyright (C) 1987-2020 Free Software Foundation, Inc.
4227825Stheraven
5227825StheravenThis file is part of GCC.
6227825Stheraven
7227825StheravenGCC is free software; you can redistribute it and/or modify it under
8227825Stheraventhe terms of the GNU General Public License as published by the Free
9227825StheravenSoftware Foundation; either version 3, or (at your option) any later
10241903Sdimversion.
11241903Sdim
12241903SdimGCC is distributed in the hope that it will be useful, but WITHOUT ANY
13241903SdimWARRANTY; without even the implied warranty of MERCHANTABILITY or
14241903SdimFITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15249998Sdimfor more details.
16227825Stheraven
17241903SdimYou should have received a copy of the GNU General Public License
18241903Sdimalong with GCC; see the file COPYING3.  If not see
19227825Stheraven<http://www.gnu.org/licenses/>.  */
20227825Stheraven
21227825Stheraven#ifndef GCC_OUTPUT_H
22227825Stheraven#define GCC_OUTPUT_H
23262801Sdim
24232950Stheraven/* Initialize data in final at the beginning of a compilation.  */
25227825Stheravenextern void init_final (const char *);
26227825Stheraven
27227825Stheraven/* Enable APP processing of subsequent output.
28227825Stheraven   Used before the output from an `asm' statement.  */
29262801Sdimextern void app_enable (void);
30262801Sdim
31262801Sdim/* Disable APP processing of subsequent output.
32262801Sdim   Called from varasm.c before most kinds of output.  */
33262801Sdimextern void app_disable (void);
34262801Sdim
35227825Stheraven/* Return the number of slots filled in the current
36227825Stheraven   delayed branch sequence (we don't count the insn needing the
37227825Stheraven   delay slot).   Zero if not in a delayed branch sequence.  */
38227825Stheravenextern int dbr_sequence_length (void);
39227825Stheraven
40227825Stheraven/* Indicate that branch shortening hasn't yet been done.  */
41227825Stheravenextern void init_insn_lengths (void);
42227825Stheraven
43227825Stheraven/* Obtain the current length of an insn.  If branch shortening has been done,
44227825Stheraven   get its actual length.  Otherwise, get its maximum length.  */
45227825Stheravenextern int get_attr_length (rtx_insn *);
46227825Stheraven
47227825Stheraven/* Obtain the current length of an insn.  If branch shortening has been done,
48227825Stheraven   get its actual length.  Otherwise, get its minimum length.  */
49227825Stheravenextern int get_attr_min_length (rtx_insn *);
50227825Stheraven
51227825Stheraven/* Make a pass over all insns and compute their actual lengths by shortening
52227825Stheraven   any branches of variable length if possible.  */
53227825Stheravenextern void shorten_branches (rtx_insn *);
54227825Stheraven
55249998Sdimconst char *get_some_local_dynamic_name ();
56227825Stheraven
57227825Stheraven/* Output assembler code for the start of a function,
58249998Sdim   and initialize some of the variables in this file
59249998Sdim   for the new function.  The label for the function and associated
60249998Sdim   assembler pseudo-ops have already been output in
61249998Sdim   `assemble_start_function'.  */
62227825Stheravenextern void final_start_function (rtx_insn *, FILE *, int);
63249998Sdim
64249998Sdim/* Output assembler code for the end of a function.
65249998Sdim   For clarity, args are same as those of `final_start_function'
66249998Sdim   even though not all of them are needed.  */
67249998Sdimextern void final_end_function (void);
68249998Sdim
69249998Sdim/* Output assembler code for some insns: all or part of a function.  */
70249998Sdimextern void final (rtx_insn *, FILE *, int);
71227825Stheraven
72262801Sdim/* The final scan for one insn, INSN.  Args are same as in `final', except
73262801Sdim   that INSN is the insn being scanned.  Value returned is the next insn to
74   be scanned.  */
75extern 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.  */
79extern rtx alter_subreg (rtx *, bool);
80
81/* Print an operand using machine-dependent assembler syntax.  */
82extern 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.  */
86extern 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.  */
90extern 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.  */
95extern int insn_current_reference_address (rtx_insn *);
96
97/* Find the alignment associated with a CODE_LABEL.
98   Defined in final.c.  */
99extern align_flags label_to_alignment (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 with access mode MODE
108   using machine-dependent assembler syntax.  */
109extern 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.  */
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#else
121#define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
122#endif
123
124extern void fprint_whex (FILE *, unsigned HOST_WIDE_INT);
125extern void fprint_ul (FILE *, unsigned long);
126extern int sprint_ul (char *, unsigned long);
127
128extern 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.  */
132extern 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.  */
137extern int final_forward_branch_p (rtx_insn *);
138
139/* Return 1 if this function uses only the registers that can be
140   safely renumbered.  */
141extern 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.  */
145extern void leaf_renumber_regs_insn (rtx);
146
147/* Locate the proper template for the given insn-code.  */
148extern const char *get_insn_template (int, rtx_insn *);
149
150/* Functions in varasm.c.  */
151
152/* Emit any pending weak declarations.  */
153extern 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.  */
162extern 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.  */
167extern int decode_reg_name_and_count (const char *, int *);
168
169extern void do_assemble_alias (tree, tree);
170extern void do_assemble_symver (tree, tree);
171
172extern void default_assemble_visibility (tree, int);
173
174/* Output a string of literal assembler code
175   for an `asm' keyword used between functions.  */
176extern void assemble_asm (tree);
177
178/* Get the function's name from a decl, as described by its RTL.  */
179extern 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.  */
185extern 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.  */
189extern 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).  */
200extern void assemble_variable (tree, int, int, int);
201
202/* Put the vtable verification constructor initialization function
203   into the preinit array.  */
204extern 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.  */
208extern void assemble_undefined_decl (tree);
209
210/* Compute the alignment of variable specified by DECL.
211   DONT_OUTPUT_DATA is from assemble_variable.  */
212extern 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.  */
217extern void assemble_external (tree);
218
219/* Assemble code to leave SIZE bytes of zeros.  */
220extern void assemble_zeros (unsigned HOST_WIDE_INT);
221
222/* Assemble an alignment pseudo op for an ALIGN-bit boundary.  */
223extern void assemble_align (unsigned int);
224
225/* Assemble a string constant with the specified C string as contents.  */
226extern void assemble_string (const char *, int);
227
228/* Similar, for calling a library function FUN.  */
229extern void assemble_external_libcall (rtx);
230
231/* Assemble a label named NAME.  */
232extern 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).  */
238extern 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.  */
244extern 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.  */
250extern 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.  */
259extern 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.  */
263extern void assemble_integer_with_op (const char *, rtx);
264
265/* The default implementation of the asm_out.integer target hook.  */
266extern 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. */
272extern 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.  */
276extern 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.  */
287extern 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.  */
291extern 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.  */
296extern bool constant_pool_empty_p (void);
297
298extern rtx_insn *peephole (rtx_insn *);
299
300extern void output_shared_constant_pool (void);
301
302extern void output_object_blocks (void);
303
304extern 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.  */
312extern rtx_sequence *final_sequence;
313
314/* File in which assembler code is being written.  */
315
316#ifdef BUFSIZ
317extern FILE *asm_out_file;
318#endif
319
320/* The first global object in the file.  */
321extern const char *first_global_object_name;
322
323/* The first weak object in the file.  */
324extern const char *weak_global_object_name;
325
326/* Nonnull if the insn currently being emitted was a COND_EXEC pattern.  */
327extern rtx current_insn_predicate;
328
329/* Last insn processed by final_scan_insn.  */
330extern 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.  */
335extern const rtx_insn *this_is_asm_operands;
336
337/* Carry information from ASM_DECLARE_OBJECT_NAME
338   to ASM_FINISH_DECLARE_OBJECT.  */
339extern int size_directive_output;
340extern tree last_assemble_variable_decl;
341
342extern 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.  */
346extern 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.  */
350extern int compute_reloc_for_constant (tree);
351
352/* User label prefix in effect for this compilation.  */
353extern const char *user_label_prefix;
354
355/* Default target function prologue and epilogue assembler output.  */
356extern void default_function_pro_epilogue (FILE *);
357
358/* Default target function switched text sections.  */
359extern void default_function_switched_text_sections (FILE *, tree, bool);
360
361/* Default target hook that outputs nothing to a stream.  */
362extern void no_asm_to_stream (FILE *);
363
364/* Flags controlling properties of a section.  */
365#define SECTION_ENTSIZE	 0x000ff	/* entity size in section */
366#define SECTION_CODE	 0x00100	/* contains code */
367#define SECTION_WRITE	 0x00200	/* data is writable */
368#define SECTION_DEBUG	 0x00400	/* contains debug data */
369#define SECTION_LINKONCE 0x00800	/* is linkonce */
370#define SECTION_SMALL	 0x01000	/* contains "small data" */
371#define SECTION_BSS	 0x02000	/* contains zeros only */
372#define SECTION_FORGET	 0x04000	/* forget that we've entered the section */
373#define SECTION_MERGE	 0x08000	/* contains mergeable data */
374#define SECTION_STRINGS  0x10000	/* contains zero terminated strings without
375					   embedded zeros */
376#define SECTION_OVERRIDE 0x20000	/* allow override of default flags */
377#define SECTION_TLS	 0x40000	/* contains thread-local storage */
378#define SECTION_NOTYPE	 0x80000	/* don't output @progbits */
379#define SECTION_DECLARED 0x100000	/* section has been used */
380#define SECTION_STYLE_MASK 0x600000	/* bits used for SECTION_STYLE */
381#define SECTION_COMMON   0x800000	/* contains common data */
382#define SECTION_RELRO	 0x1000000	/* data is readonly after relocation processing */
383#define SECTION_EXCLUDE  0x2000000	/* discarded by the linker */
384#define SECTION_MACH_DEP 0x4000000	/* subsequent bits reserved for target */
385
386/* This SECTION_STYLE is used for unnamed sections that we can switch
387   to using a special assembler directive.  */
388#define SECTION_UNNAMED	 0x000000
389
390/* This SECTION_STYLE is used for named sections that we can switch
391   to using a general section directive.  */
392#define SECTION_NAMED	 0x200000
393
394/* This SECTION_STYLE is used for sections that we cannot switch to at
395   all.  The choice of section is implied by the directive that we use
396   to declare the object.  */
397#define SECTION_NOSWITCH 0x400000
398
399/* A helper function for default_elf_select_section and
400   default_elf_unique_section.  Categorizes the DECL.  */
401
402enum section_category
403{
404  SECCAT_TEXT,
405
406  SECCAT_RODATA,
407  SECCAT_RODATA_MERGE_STR,
408  SECCAT_RODATA_MERGE_STR_INIT,
409  SECCAT_RODATA_MERGE_CONST,
410  SECCAT_SRODATA,
411
412  SECCAT_DATA,
413
414  /* To optimize loading of shared programs, define following subsections
415     of data section:
416	_REL	Contains data that has relocations, so they get grouped
417		together and dynamic linker will visit fewer pages in memory.
418	_RO	Contains data that is otherwise read-only.  This is useful
419		with prelinking as most relocations won't be dynamically
420		linked and thus stay read only.
421	_LOCAL	Marks data containing relocations only to local objects.
422		These relocations will get fully resolved by prelinking.  */
423  SECCAT_DATA_REL,
424  SECCAT_DATA_REL_LOCAL,
425  SECCAT_DATA_REL_RO,
426  SECCAT_DATA_REL_RO_LOCAL,
427
428  SECCAT_SDATA,
429  SECCAT_TDATA,
430
431  SECCAT_BSS,
432  SECCAT_SBSS,
433  SECCAT_TBSS
434};
435
436/* Information that is provided by all instances of the section type.  */
437struct GTY(()) section_common {
438  /* The set of SECTION_* flags that apply to this section.  */
439  unsigned int flags;
440};
441
442/* Information about a SECTION_NAMED section.  */
443struct GTY(()) named_section {
444  struct section_common common;
445
446  /* The name of the section.  */
447  const char *name;
448
449  /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
450     section is associated.  */
451  tree decl;
452};
453
454/* A callback that writes the assembly code for switching to an unnamed
455   section.  The argument provides callback-specific data.  */
456typedef void (*unnamed_section_callback) (const void *);
457
458/* Information about a SECTION_UNNAMED section.  */
459struct GTY(()) unnamed_section {
460  struct section_common common;
461
462  /* The callback used to switch to the section, and the data that
463     should be passed to the callback.  */
464  unnamed_section_callback GTY ((skip)) callback;
465  const void *GTY ((skip)) data;
466
467  /* The next entry in the chain of unnamed sections.  */
468  section *next;
469};
470
471/* A callback that writes the assembly code for a decl in a
472   SECTION_NOSWITCH section.  DECL is the decl that should be assembled
473   and NAME is the name of its SYMBOL_REF.  SIZE is the size of the decl
474   in bytes and ROUNDED is that size rounded up to the next
475   BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
476
477   Return true if the callback used DECL_ALIGN to set the object's
478   alignment.  A false return value implies that we are relying
479   on the rounded size to align the decl.  */
480typedef bool (*noswitch_section_callback) (tree decl, const char *name,
481					   unsigned HOST_WIDE_INT size,
482					   unsigned HOST_WIDE_INT rounded);
483
484/* Information about a SECTION_NOSWITCH section.  */
485struct GTY(()) noswitch_section {
486  struct section_common common;
487
488  /* The callback used to assemble decls in this section.  */
489  noswitch_section_callback GTY ((skip)) callback;
490};
491
492/* Information about a section, which may be named or unnamed.  */
493union GTY ((desc ("SECTION_STYLE (&(%h))"), for_user)) section {
494  struct section_common GTY ((skip)) common;
495  struct named_section GTY ((tag ("SECTION_NAMED"))) named;
496  struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
497  struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
498};
499
500/* Return the style of section SECT.  */
501#define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
502
503struct object_block;
504
505/* Special well-known sections.  */
506extern GTY(()) section *text_section;
507extern GTY(()) section *data_section;
508extern GTY(()) section *readonly_data_section;
509extern GTY(()) section *sdata_section;
510extern GTY(()) section *ctors_section;
511extern GTY(()) section *dtors_section;
512extern GTY(()) section *bss_section;
513extern GTY(()) section *sbss_section;
514extern GTY(()) section *exception_section;
515extern GTY(()) section *eh_frame_section;
516extern GTY(()) section *tls_comm_section;
517extern GTY(()) section *comm_section;
518extern GTY(()) section *lcomm_section;
519extern GTY(()) section *bss_noswitch_section;
520
521extern GTY(()) section *in_section;
522extern GTY(()) bool in_cold_section_p;
523
524extern section *get_unnamed_section (unsigned int, void (*) (const void *),
525				     const void *);
526extern section *get_section (const char *, unsigned int, tree,
527			     bool not_existing = false);
528extern section *get_named_section (tree, const char *, int);
529extern section *get_variable_section (tree, bool);
530extern void place_block_symbol (rtx);
531extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
532			       enum tls_model);
533extern section *mergeable_constant_section (machine_mode,
534					    unsigned HOST_WIDE_INT,
535					    unsigned int);
536extern section *function_section (tree);
537extern section *unlikely_text_section (void);
538extern section *current_function_section (void);
539extern void switch_to_other_text_partition (void);
540
541/* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
542   not) section for PRIORITY.  */
543extern section *get_cdtor_priority_section (int, bool);
544
545extern bool unlikely_text_section_p (section *);
546extern void switch_to_section (section *);
547extern void output_section_asm_op (const void *);
548
549extern void record_tm_clone_pair (tree, tree);
550extern void finish_tm_clone_pairs (void);
551extern tree get_tm_clone_pair (tree);
552
553extern void default_asm_output_source_filename (FILE *, const char *);
554extern void output_file_directive (FILE *, const char *);
555
556extern unsigned int default_section_type_flags (tree, const char *, int);
557
558extern bool have_global_bss_p (void);
559extern bool bss_initializer_p (const_tree, bool = false);
560
561extern void default_no_named_section (const char *, unsigned int, tree);
562extern void default_elf_asm_named_section (const char *, unsigned int, tree);
563extern enum section_category categorize_decl_for_section (const_tree, int);
564extern void default_coff_asm_named_section (const char *, unsigned int, tree);
565extern void default_pe_asm_named_section (const char *, unsigned int, tree);
566
567extern void default_named_section_asm_out_destructor (rtx, int);
568extern void default_dtor_section_asm_out_destructor (rtx, int);
569extern void default_named_section_asm_out_constructor (rtx, int);
570extern void default_ctor_section_asm_out_constructor (rtx, int);
571
572extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
573extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
574extern void default_unique_section (tree, int);
575extern section *default_function_rodata_section (tree);
576extern section *default_no_function_rodata_section (tree);
577extern section *default_clone_table_section (void);
578extern section *default_select_rtx_section (machine_mode, rtx,
579					    unsigned HOST_WIDE_INT);
580extern section *default_elf_select_rtx_section (machine_mode, rtx,
581						unsigned HOST_WIDE_INT);
582extern void default_encode_section_info (tree, rtx, int);
583extern const char *default_strip_name_encoding (const char *);
584extern void default_asm_output_anchor (rtx);
585extern bool default_use_anchors_for_symbol_p (const_rtx);
586extern bool default_binds_local_p (const_tree);
587extern bool default_binds_local_p_1 (const_tree, int);
588extern bool default_binds_local_p_2 (const_tree);
589extern bool default_binds_local_p_3 (const_tree, bool, bool, bool, bool);
590extern void default_globalize_label (FILE *, const char *);
591extern void default_globalize_decl_name (FILE *, tree);
592extern void default_emit_unwind_label (FILE *, tree, int, int);
593extern void default_emit_except_table_label (FILE *);
594extern void default_generate_internal_label (char *, const char *,
595					     unsigned long);
596extern void default_internal_label (FILE *, const char *, unsigned long);
597extern void default_asm_declare_constant_name (FILE *, const char *,
598					       const_tree, HOST_WIDE_INT);
599extern void default_file_start (void);
600extern void file_end_indicate_exec_stack (void);
601extern void file_end_indicate_split_stack (void);
602
603extern void default_elf_asm_output_external (FILE *file, tree,
604					     const char *);
605extern void default_elf_asm_output_limited_string (FILE *, const char *);
606extern void default_elf_asm_output_ascii (FILE *, const char *, unsigned int);
607extern void default_elf_internal_label (FILE *, const char *, unsigned long);
608
609extern void default_elf_init_array_asm_out_constructor (rtx, int);
610extern void default_elf_fini_array_asm_out_destructor (rtx, int);
611extern int maybe_assemble_visibility (tree);
612
613extern int default_address_cost (rtx, machine_mode, addr_space_t, bool);
614
615/* Stack usage.  */
616extern void output_stack_usage (void);
617
618#endif /* ! GCC_OUTPUT_H */
619