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