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author kent <kent@cr.ie.u-ryukyu.ac.jp>
date Fri, 17 Jul 2009 14:47:48 +0900
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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 Free Software Foundation, Inc.
5
6 This file is part of GCC.
7
8 GCC is free software; you can redistribute it and/or modify it under
9 the terms of the GNU General Public License as published by the Free
10 Software Foundation; either version 3, or (at your option) any later
11 version.
12
13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 for more details.
17
18 You should have received a copy of the GNU General Public License
19 along 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. */
26 extern void init_final (const char *);
27
28 /* Enable APP processing of subsequent output.
29 Used before the output from an `asm' statement. */
30 extern void app_enable (void);
31
32 /* Disable APP processing of subsequent output.
33 Called from varasm.c before most kinds of output. */
34 extern 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. */
39 extern int dbr_sequence_length (void);
40
41 /* Indicate that branch shortening hasn't yet been done. */
42 extern 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. */
46 extern 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. */
50 extern 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. */
54 extern 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'. */
61 extern 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. */
66 extern void final_end_function (void);
67
68 /* Output assembler code for some insns: all or part of a function. */
69 extern 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. */
74 extern 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. */
78 extern 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. */
82 extern 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. */
86 extern 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. */
91 extern int insn_current_reference_address (rtx);
92
93 /* Find the alignment associated with a CODE_LABEL.
94 Defined in final.c. */
95 extern int label_to_alignment (rtx);
96
97 /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol. */
98 extern void output_asm_label (rtx);
99
100 /* Marks SYMBOL_REFs in x as referenced through use of assemble_external. */
101 extern void mark_symbol_refs_as_used (rtx);
102
103 /* Print a memory reference operand for address X
104 using machine-dependent assembler syntax. */
105 extern void output_address (rtx);
106
107 /* Print an integer constant expression in assembler syntax.
108 Addition and subtraction are the only arithmetic
109 that may appear in these expressions. */
110 extern void output_addr_const (FILE *, rtx);
111
112 /* Output a string of assembler code, substituting numbers, strings
113 and fixed syntactic prefixes. */
114 #if GCC_VERSION >= 3004
115 #define ATTRIBUTE_ASM_FPRINTF(m, n) __attribute__ ((__format__ (__asm_fprintf__, m, n))) ATTRIBUTE_NONNULL(m)
116 /* This is a magic identifier which allows GCC to figure out the type
117 of HOST_WIDE_INT for %wd specifier checks. You must issue this
118 typedef before using the __asm_fprintf__ format attribute. */
119 typedef HOST_WIDE_INT __gcc_host_wide_int__;
120 #else
121 #define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
122 #endif
123
124 extern void asm_fprintf (FILE *file, const char *p, ...)
125 ATTRIBUTE_ASM_FPRINTF(2, 3);
126
127 /* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
128 words. */
129 extern void split_double (rtx, rtx *, rtx *);
130
131 /* Return nonzero if this function has no function calls. */
132 extern int leaf_function_p (void);
133
134 /* Return 1 if branch is a forward branch.
135 Uses insn_shuid array, so it works only in the final pass. May be used by
136 output templates to add branch prediction hints, for example. */
137 extern int final_forward_branch_p (rtx);
138
139 /* Return 1 if this function uses only the registers that can be
140 safely renumbered. */
141 extern int only_leaf_regs_used (void);
142
143 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
144 available in leaf functions. */
145 extern void leaf_renumber_regs_insn (rtx);
146
147 /* Locate the proper template for the given insn-code. */
148 extern const char *get_insn_template (int, rtx);
149
150 /* Functions in varasm.c. */
151
152 /* Declare DECL to be a weak symbol. */
153 extern void declare_weak (tree);
154 /* Merge weak status. */
155 extern void merge_weak (tree, tree);
156
157 /* Emit any pending weak declarations. */
158 extern void weak_finish (void);
159
160 /* Emit any pending emutls declarations and initializations. */
161 extern void emutls_finish (void);
162
163 /* Decode an `asm' spec for a declaration as a register name.
164 Return the register number, or -1 if nothing specified,
165 or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
166 or -3 if ASMSPEC is `cc' and is not recognized,
167 or -4 if ASMSPEC is `memory' and is not recognized.
168 Accept an exact spelling or a decimal number.
169 Prefixes such as % are optional. */
170 extern int decode_reg_name (const char *);
171
172 extern void assemble_alias (tree, tree);
173
174 extern void default_assemble_visibility (tree, int);
175
176 /* Output a string of literal assembler code
177 for an `asm' keyword used between functions. */
178 extern void assemble_asm (tree);
179
180 /* Output assembler code for the constant pool of a function and associated
181 with defining the name of the function. DECL describes the function.
182 NAME is the function's name. For the constant pool, we use the current
183 constant pool data. */
184 extern void assemble_start_function (tree, const char *);
185
186 /* Output assembler code associated with defining the size of the
187 function. DECL describes the function. NAME is the function's name. */
188 extern void assemble_end_function (tree, const char *);
189
190 /* Assemble everything that is needed for a variable or function declaration.
191 Not used for automatic variables, and not used for function definitions.
192 Should not be called for variables of incomplete structure type.
193
194 TOP_LEVEL is nonzero if this variable has file scope.
195 AT_END is nonzero if this is the special handling, at end of compilation,
196 to define things that have had only tentative definitions.
197 DONT_OUTPUT_DATA if nonzero means don't actually output the
198 initial value (that will be done by the caller). */
199 extern void assemble_variable (tree, int, int, int);
200
201 /* Compute the alignment of variable specified by DECL.
202 DONT_OUTPUT_DATA is from assemble_variable. */
203 extern void align_variable (tree decl, bool dont_output_data);
204
205 /* Queue for outputting something to declare an external symbol to the
206 assembler. (Most assemblers don't need this, so we normally output
207 nothing.) Do nothing if DECL is not external. */
208 extern void assemble_external (tree);
209
210 /* Assemble code to leave SIZE bytes of zeros. */
211 extern void assemble_zeros (unsigned HOST_WIDE_INT);
212
213 /* Assemble an alignment pseudo op for an ALIGN-bit boundary. */
214 extern void assemble_align (int);
215
216 /* Assemble a string constant with the specified C string as contents. */
217 extern void assemble_string (const char *, int);
218
219 /* Similar, for calling a library function FUN. */
220 extern void assemble_external_libcall (rtx);
221
222 /* Assemble a label named NAME. */
223 extern void assemble_label (const char *);
224
225 /* Output to FILE (an assembly file) a reference to NAME. If NAME
226 starts with a *, the rest of NAME is output verbatim. Otherwise
227 NAME is transformed in a target-specific way (usually by the
228 addition of an underscore). */
229 extern void assemble_name_raw (FILE *, const char *);
230
231 /* Like assemble_name_raw, but should be used when NAME might refer to
232 an entity that is also represented as a tree (like a function or
233 variable). If NAME does refer to such an entity, that entity will
234 be marked as referenced. */
235 extern void assemble_name (FILE *, const char *);
236
237 /* Return the assembler directive for creating a given kind of integer
238 object. SIZE is the number of bytes in the object and ALIGNED_P
239 indicates whether it is known to be aligned. Return NULL if the
240 assembly dialect has no such directive.
241
242 The returned string should be printed at the start of a new line and
243 be followed immediately by the object's initial value. */
244 extern const char *integer_asm_op (int, int);
245
246 /* Use directive OP to assemble an integer object X. Print OP at the
247 start of the line, followed immediately by the value of X. */
248 extern void assemble_integer_with_op (const char *, rtx);
249
250 /* The default implementation of the asm_out.integer target hook. */
251 extern bool default_assemble_integer (rtx, unsigned int, int);
252
253 /* Assemble the integer constant X into an object of SIZE bytes. ALIGN is
254 the alignment of the integer in bits. Return 1 if we were able to output
255 the constant, otherwise 0. If FORCE is nonzero the constant must
256 be outputable. */
257 extern bool assemble_integer (rtx, unsigned, unsigned, int);
258
259 /* An interface to assemble_integer for the common case in which a value is
260 fully aligned and must be printed. VALUE is the value of the integer
261 object and SIZE is the number of bytes it contains. */
262 #define assemble_aligned_integer(SIZE, VALUE) \
263 assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
264
265 #ifdef REAL_VALUE_TYPE_SIZE
266 /* Assemble the floating-point constant D into an object of size MODE. */
267 extern void assemble_real (REAL_VALUE_TYPE, enum machine_mode, unsigned);
268 #endif
269
270 /* Write the address of the entity given by SYMBOL to SEC. */
271 extern void assemble_addr_to_section (rtx, section *);
272
273 /* Return the size of the constant pool. */
274 extern int get_pool_size (void);
275
276 #ifdef HAVE_peephole
277 extern rtx peephole (rtx);
278 #endif
279
280 extern void output_shared_constant_pool (void);
281
282 extern void output_object_blocks (void);
283
284 /* Whether a constructor CTOR is a valid static constant initializer if all
285 its elements are. This used to be internal to initializer_constant_valid_p
286 and has been exposed to let other functions like categorize_ctor_elements
287 evaluate the property while walking a constructor for other purposes. */
288
289 extern bool constructor_static_from_elts_p (const_tree);
290
291 /* Return nonzero if VALUE is a valid constant-valued expression
292 for use in initializing a static variable; one that can be an
293 element of a "constant" initializer.
294
295 Return null_pointer_node if the value is absolute;
296 if it is relocatable, return the variable that determines the relocation.
297 We assume that VALUE has been folded as much as possible;
298 therefore, we do not need to check for such things as
299 arithmetic-combinations of integers. */
300 extern tree initializer_constant_valid_p (tree, tree);
301
302 /* Output assembler code for constant EXP to FILE, with no label.
303 This includes the pseudo-op such as ".int" or ".byte", and a newline.
304 Assumes output_addressed_constants has been done on EXP already.
305
306 Generate exactly SIZE bytes of assembler data, padding at the end
307 with zeros if necessary. SIZE must always be specified.
308
309 ALIGN is the alignment in bits that may be assumed for the data. */
310 extern void output_constant (tree, unsigned HOST_WIDE_INT, unsigned int);
311
312 /* When outputting delayed branch sequences, this rtx holds the
313 sequence being output. It is null when no delayed branch
314 sequence is being output, so it can be used as a test in the
315 insn output code.
316
317 This variable is defined in final.c. */
318 extern rtx final_sequence;
319
320 /* The line number of the beginning of the current function. Various
321 md code needs this so that it can output relative linenumbers. */
322
323 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers. */
324 extern int sdb_begin_function_line;
325 #endif
326
327 /* File in which assembler code is being written. */
328
329 #ifdef BUFSIZ
330 extern FILE *asm_out_file;
331 #endif
332
333 /* The first global object in the file. */
334 extern const char *first_global_object_name;
335
336 /* The first weak object in the file. */
337 extern const char *weak_global_object_name;
338
339 /* Nonzero if function being compiled doesn't contain any calls
340 (ignoring the prologue and epilogue). This is set prior to
341 local register allocation and is valid for the remaining
342 compiler passes. */
343
344 extern int current_function_is_leaf;
345
346 /* Nonzero if function being compiled doesn't modify the stack pointer
347 (ignoring the prologue and epilogue). This is only valid after
348 pass_stack_ptr_mod has run. */
349
350 extern int current_function_sp_is_unchanging;
351
352 /* Nonzero if the function being compiled is a leaf function which only
353 uses leaf registers. This is valid after reload (specifically after
354 sched2) and is useful only if the port defines LEAF_REGISTERS. */
355
356 extern int current_function_uses_only_leaf_regs;
357
358 /* Default file in which to dump debug output. */
359
360 #ifdef BUFSIZ
361 extern FILE *dump_file;
362 #endif
363
364 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern. */
365 extern rtx current_insn_predicate;
366
367 /* Last insn processed by final_scan_insn. */
368 extern rtx current_output_insn;
369
370 /* Nonzero while outputting an `asm' with operands.
371 This means that inconsistencies are the user's fault, so don't die.
372 The precise value is the insn being output, to pass to error_for_asm. */
373 extern rtx this_is_asm_operands;
374
375 /* Carry information from ASM_DECLARE_OBJECT_NAME
376 to ASM_FINISH_DECLARE_OBJECT. */
377 extern int size_directive_output;
378 extern tree last_assemble_variable_decl;
379
380 extern bool first_function_block_is_cold;
381
382 /* Decide whether DECL needs to be in a writable section.
383 RELOC is the same as for SELECT_SECTION. */
384 extern bool decl_readonly_section (const_tree, int);
385
386 /* This can be used to compute RELOC for the function above, when
387 given a constant expression. */
388 extern int compute_reloc_for_constant (tree);
389
390 /* User label prefix in effect for this compilation. */
391 extern const char *user_label_prefix;
392
393 /* Default target function prologue and epilogue assembler output. */
394 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
395
396 /* Default target hook that outputs nothing to a stream. */
397 extern void no_asm_to_stream (FILE *);
398
399 /* Flags controlling properties of a section. */
400 #define SECTION_ENTSIZE 0x000ff /* entity size in section */
401 #define SECTION_CODE 0x00100 /* contains code */
402 #define SECTION_WRITE 0x00200 /* data is writable */
403 #define SECTION_DEBUG 0x00400 /* contains debug data */
404 #define SECTION_LINKONCE 0x00800 /* is linkonce */
405 #define SECTION_SMALL 0x01000 /* contains "small data" */
406 #define SECTION_BSS 0x02000 /* contains zeros only */
407 #define SECTION_FORGET 0x04000 /* forget that we've entered the section */
408 #define SECTION_MERGE 0x08000 /* contains mergeable data */
409 #define SECTION_STRINGS 0x10000 /* contains zero terminated strings without
410 embedded zeros */
411 #define SECTION_OVERRIDE 0x20000 /* allow override of default flags */
412 #define SECTION_TLS 0x40000 /* contains thread-local storage */
413 #define SECTION_NOTYPE 0x80000 /* don't output @progbits */
414 #define SECTION_DECLARED 0x100000 /* section has been used */
415 #define SECTION_STYLE_MASK 0x600000 /* bits used for SECTION_STYLE */
416 #define SECTION_COMMON 0x800000 /* contains common data */
417 #define SECTION_MACH_DEP 0x1000000 /* subsequent bits reserved for target */
418
419 /* This SECTION_STYLE is used for unnamed sections that we can switch
420 to using a special assembler directive. */
421 #define SECTION_UNNAMED 0x000000
422
423 /* This SECTION_STYLE is used for named sections that we can switch
424 to using a general section directive. */
425 #define SECTION_NAMED 0x200000
426
427 /* This SECTION_STYLE is used for sections that we cannot switch to at
428 all. The choice of section is implied by the directive that we use
429 to declare the object. */
430 #define SECTION_NOSWITCH 0x400000
431
432 /* A helper function for default_elf_select_section and
433 default_elf_unique_section. Categorizes the DECL. */
434
435 enum section_category
436 {
437 SECCAT_TEXT,
438
439 SECCAT_RODATA,
440 SECCAT_RODATA_MERGE_STR,
441 SECCAT_RODATA_MERGE_STR_INIT,
442 SECCAT_RODATA_MERGE_CONST,
443 SECCAT_SRODATA,
444
445 SECCAT_DATA,
446
447 /* To optimize loading of shared programs, define following subsections
448 of data section:
449 _REL Contains data that has relocations, so they get grouped
450 together and dynamic linker will visit fewer pages in memory.
451 _RO Contains data that is otherwise read-only. This is useful
452 with prelinking as most relocations won't be dynamically
453 linked and thus stay read only.
454 _LOCAL Marks data containing relocations only to local objects.
455 These relocations will get fully resolved by prelinking. */
456 SECCAT_DATA_REL,
457 SECCAT_DATA_REL_LOCAL,
458 SECCAT_DATA_REL_RO,
459 SECCAT_DATA_REL_RO_LOCAL,
460
461 SECCAT_SDATA,
462 SECCAT_TDATA,
463
464 SECCAT_BSS,
465 SECCAT_SBSS,
466 SECCAT_TBSS,
467
468 SECCAT_EMUTLS_VAR,
469 SECCAT_EMUTLS_TMPL
470 };
471
472 /* Information that is provided by all instances of the section type. */
473 struct section_common GTY(()) {
474 /* The set of SECTION_* flags that apply to this section. */
475 unsigned int flags;
476 };
477
478 /* Information about a SECTION_NAMED section. */
479 struct named_section GTY(()) {
480 struct section_common common;
481
482 /* The name of the section. */
483 const char *name;
484
485 /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
486 section is associated. */
487 tree decl;
488 };
489
490 /* A callback that writes the assembly code for switching to an unnamed
491 section. The argument provides callback-specific data. */
492 typedef void (*unnamed_section_callback) (const void *);
493
494 /* Information about a SECTION_UNNAMED section. */
495 struct unnamed_section GTY(()) {
496 struct section_common common;
497
498 /* The callback used to switch to the section, and the data that
499 should be passed to the callback. */
500 unnamed_section_callback GTY ((skip)) callback;
501 const void *GTY ((skip)) data;
502
503 /* The next entry in the chain of unnamed sections. */
504 section *next;
505 };
506
507 /* A callback that writes the assembly code for a decl in a
508 SECTION_NOSWITCH section. DECL is the decl that should be assembled
509 and NAME is the name of its SYMBOL_REF. SIZE is the size of the decl
510 in bytes and ROUNDED is that size rounded up to the next
511 BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
512
513 Return true if the callback used DECL_ALIGN to set the object's
514 alignment. A false return value implies that we are relying
515 on the rounded size to align the decl. */
516 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
517 unsigned HOST_WIDE_INT size,
518 unsigned HOST_WIDE_INT rounded);
519
520 /* Information about a SECTION_NOSWITCH section. */
521 struct noswitch_section GTY(()) {
522 struct section_common common;
523
524 /* The callback used to assemble decls in this section. */
525 noswitch_section_callback GTY ((skip)) callback;
526 };
527
528 /* Information about a section, which may be named or unnamed. */
529 union section GTY ((desc ("SECTION_STYLE (&(%h))")))
530 {
531 struct section_common GTY ((skip)) common;
532 struct named_section GTY ((tag ("SECTION_NAMED"))) named;
533 struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
534 struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
535 };
536
537 /* Return the style of section SECT. */
538 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
539
540 struct object_block;
541
542 /* Special well-known sections. */
543 extern GTY(()) section *text_section;
544 extern GTY(()) section *data_section;
545 extern GTY(()) section *readonly_data_section;
546 extern GTY(()) section *sdata_section;
547 extern GTY(()) section *ctors_section;
548 extern GTY(()) section *dtors_section;
549 extern GTY(()) section *bss_section;
550 extern GTY(()) section *sbss_section;
551 extern GTY(()) section *exception_section;
552 extern GTY(()) section *eh_frame_section;
553 extern GTY(()) section *tls_comm_section;
554 extern GTY(()) section *comm_section;
555 extern GTY(()) section *lcomm_section;
556 extern GTY(()) section *bss_noswitch_section;
557
558 extern GTY(()) section *in_section;
559 extern GTY(()) bool in_cold_section_p;
560
561 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
562 const void *);
563 extern section *get_section (const char *, unsigned int, tree);
564 extern section *get_named_section (tree, const char *, int);
565 extern void place_block_symbol (rtx);
566 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
567 enum tls_model);
568 extern section *mergeable_constant_section (enum machine_mode,
569 unsigned HOST_WIDE_INT,
570 unsigned int);
571 extern section *function_section (tree);
572 extern section *unlikely_text_section (void);
573 extern section *current_function_section (void);
574
575 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
576 not) section for PRIORITY. */
577 extern section *get_cdtor_priority_section (int, bool);
578
579 extern bool unlikely_text_section_p (section *);
580 extern void switch_to_section (section *);
581 extern void output_section_asm_op (const void *);
582
583 extern unsigned int default_section_type_flags (tree, const char *, int);
584
585 extern bool have_global_bss_p (void);
586 extern void default_no_named_section (const char *, unsigned int, tree);
587 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
588 extern enum section_category categorize_decl_for_section (const_tree, int);
589 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
590 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
591
592 extern void default_stabs_asm_out_destructor (rtx, int);
593 extern void default_named_section_asm_out_destructor (rtx, int);
594 extern void default_dtor_section_asm_out_destructor (rtx, int);
595 extern void default_stabs_asm_out_constructor (rtx, int);
596 extern void default_named_section_asm_out_constructor (rtx, int);
597 extern void default_ctor_section_asm_out_constructor (rtx, int);
598
599 extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
600 extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
601 extern void default_unique_section (tree, int);
602 extern section *default_function_rodata_section (tree);
603 extern section *default_no_function_rodata_section (tree);
604 extern section *default_select_rtx_section (enum machine_mode, rtx,
605 unsigned HOST_WIDE_INT);
606 extern section *default_elf_select_rtx_section (enum machine_mode, rtx,
607 unsigned HOST_WIDE_INT);
608 extern void default_encode_section_info (tree, rtx, int);
609 extern const char *default_strip_name_encoding (const char *);
610 extern void default_asm_output_anchor (rtx);
611 extern bool default_use_anchors_for_symbol_p (const_rtx);
612 extern bool default_binds_local_p (const_tree);
613 extern bool default_binds_local_p_1 (const_tree, int);
614 extern void default_globalize_label (FILE *, const char *);
615 extern void default_globalize_decl_name (FILE *, tree);
616 extern void default_emit_unwind_label (FILE *, tree, int, int);
617 extern void default_emit_except_table_label (FILE *);
618 extern void default_internal_label (FILE *, const char *, unsigned long);
619 extern void default_file_start (void);
620 extern void file_end_indicate_exec_stack (void);
621 extern bool default_valid_pointer_mode (enum machine_mode);
622
623 extern void default_elf_asm_output_external (FILE *file, tree,
624 const char *);
625 extern int maybe_assemble_visibility (tree);
626
627 extern int default_address_cost (rtx, bool);
628
629 /* dbxout helper functions */
630 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
631
632 extern void dbxout_int (int);
633 extern void dbxout_stabd (int, int);
634 extern void dbxout_begin_stabn (int);
635 extern void dbxout_begin_stabn_sline (int);
636 extern void dbxout_begin_empty_stabs (int);
637 extern void dbxout_begin_simple_stabs (const char *, int);
638 extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
639
640 extern void dbxout_stab_value_zero (void);
641 extern void dbxout_stab_value_label (const char *);
642 extern void dbxout_stab_value_label_diff (const char *, const char *);
643 extern void dbxout_stab_value_internal_label (const char *, int *);
644 extern void dbxout_stab_value_internal_label_diff (const char *, int *,
645 const char *);
646
647 #endif
648
649 #endif /* ! GCC_OUTPUT_H */