1 /* Declarations for insn-output.c. These functions are defined in recog.c,
3 Copyright (C) 1987, 1991, 1994, 1997, 1998, 1999, 2000, 2001, 2002,
4 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
5 Free Software Foundation, Inc.
7 This file is part of GCC.
9 GCC is free software; you can redistribute it and/or modify it under
10 the terms of the GNU General Public License as published by the Free
11 Software Foundation; either version 3, or (at your option) any later
14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
19 You should have received a copy of the GNU General Public License
20 along with GCC; see the file COPYING3. If not see
21 <http://www.gnu.org/licenses/>. */
26 /* Initialize data in final at the beginning of a compilation. */
27 extern void init_final (const char *);
29 /* Enable APP processing of subsequent output.
30 Used before the output from an `asm' statement. */
31 extern void app_enable (void);
33 /* Disable APP processing of subsequent output.
34 Called from varasm.c before most kinds of output. */
35 extern void app_disable (void);
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. */
40 extern int dbr_sequence_length (void);
42 /* Indicate that branch shortening hasn't yet been done. */
43 extern void init_insn_lengths (void);
45 /* Obtain the current length of an insn. If branch shortening has been done,
46 get its actual length. Otherwise, get its maximum length. */
47 extern int get_attr_length (rtx
);
49 /* Obtain the current length of an insn. If branch shortening has been done,
50 get its actual length. Otherwise, get its minimum length. */
51 extern int get_attr_min_length (rtx
);
53 /* Make a pass over all insns and compute their actual lengths by shortening
54 any branches of variable length if possible. */
55 extern void shorten_branches (rtx
);
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'. */
62 extern void final_start_function (rtx
, FILE *, int);
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. */
67 extern void final_end_function (void);
69 /* Output assembler code for some insns: all or part of a function. */
70 extern void final (rtx
, FILE *, int);
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
75 extern rtx
final_scan_insn (rtx
, FILE *, int, int, int *);
77 /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
79 extern rtx
alter_subreg (rtx
*);
81 /* Print an operand using machine-dependent assembler syntax. */
82 extern void output_operand (rtx
, int);
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. */
86 extern void output_operand_lossage (const char *, ...) ATTRIBUTE_PRINTF_1
;
88 /* Output a string of assembler code, substituting insn operands.
89 Defined in final.c. */
90 extern void output_asm_insn (const char *, rtx
*);
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. */
95 extern int insn_current_reference_address (rtx
);
97 /* Find the alignment associated with a CODE_LABEL.
98 Defined in final.c. */
99 extern int label_to_alignment (rtx
);
101 /* Find the alignment maximum skip associated with a CODE_LABEL.
102 Defined in final.c. */
103 extern int label_to_max_skip (rtx
);
105 /* Output a LABEL_REF, or a bare CODE_LABEL, as an assembler symbol. */
106 extern void output_asm_label (rtx
);
108 /* Marks SYMBOL_REFs in x as referenced through use of assemble_external. */
109 extern void mark_symbol_refs_as_used (rtx
);
111 /* Print a memory reference operand for address X
112 using machine-dependent assembler syntax. */
113 extern void output_address (rtx
);
115 /* Print an integer constant expression in assembler syntax.
116 Addition and subtraction are the only arithmetic
117 that may appear in these expressions. */
118 extern void output_addr_const (FILE *, rtx
);
120 /* Output a string of assembler code, substituting numbers, strings
121 and fixed syntactic prefixes. */
122 #if GCC_VERSION >= 3004
123 #define ATTRIBUTE_ASM_FPRINTF(m, n) __attribute__ ((__format__ (__asm_fprintf__, m, n))) ATTRIBUTE_NONNULL(m)
124 /* This is a magic identifier which allows GCC to figure out the type
125 of HOST_WIDE_INT for %wd specifier checks. You must issue this
126 typedef before using the __asm_fprintf__ format attribute. */
127 typedef HOST_WIDE_INT __gcc_host_wide_int__
;
129 #define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
132 extern void asm_fprintf (FILE *file
, const char *p
, ...)
133 ATTRIBUTE_ASM_FPRINTF(2, 3);
135 /* Split up a CONST_DOUBLE or integer constant rtx into two rtx's for single
137 extern void split_double (rtx
, rtx
*, rtx
*);
139 /* Return nonzero if this function has no function calls. */
140 extern int leaf_function_p (void);
142 /* Return 1 if branch is a forward branch.
143 Uses insn_shuid array, so it works only in the final pass. May be used by
144 output templates to add branch prediction hints, for example. */
145 extern int final_forward_branch_p (rtx
);
147 /* Return 1 if this function uses only the registers that can be
148 safely renumbered. */
149 extern int only_leaf_regs_used (void);
151 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
152 available in leaf functions. */
153 extern void leaf_renumber_regs_insn (rtx
);
155 /* Locate the proper template for the given insn-code. */
156 extern const char *get_insn_template (int, rtx
);
158 /* Functions in varasm.c. */
160 /* Declare DECL to be a weak symbol. */
161 extern void declare_weak (tree
);
162 /* Merge weak status. */
163 extern void merge_weak (tree
, tree
);
165 /* Emit any pending weak declarations. */
166 extern void weak_finish (void);
168 /* Emit any pending emutls declarations and initializations. */
169 extern void emutls_finish (void);
171 /* Return the default TLS model for a given variable. */
172 extern enum tls_model
decl_default_tls_model (const_tree
);
174 /* Decode an `asm' spec for a declaration as a register name.
175 Return the register number, or -1 if nothing specified,
176 or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
177 or -3 if ASMSPEC is `cc' and is not recognized,
178 or -4 if ASMSPEC is `memory' and is not recognized.
179 Accept an exact spelling or a decimal number.
180 Prefixes such as % are optional. */
181 extern int decode_reg_name (const char *);
183 extern void assemble_alias (tree
, tree
);
185 extern void default_assemble_visibility (tree
, int);
187 /* Output a string of literal assembler code
188 for an `asm' keyword used between functions. */
189 extern void assemble_asm (tree
);
191 /* Output assembler code for the constant pool of a function and associated
192 with defining the name of the function. DECL describes the function.
193 NAME is the function's name. For the constant pool, we use the current
194 constant pool data. */
195 extern void assemble_start_function (tree
, const char *);
197 /* Output assembler code associated with defining the size of the
198 function. DECL describes the function. NAME is the function's name. */
199 extern void assemble_end_function (tree
, const char *);
201 /* Assemble everything that is needed for a variable or function declaration.
202 Not used for automatic variables, and not used for function definitions.
203 Should not be called for variables of incomplete structure type.
205 TOP_LEVEL is nonzero if this variable has file scope.
206 AT_END is nonzero if this is the special handling, at end of compilation,
207 to define things that have had only tentative definitions.
208 DONT_OUTPUT_DATA if nonzero means don't actually output the
209 initial value (that will be done by the caller). */
210 extern void assemble_variable (tree
, int, int, int);
212 /* Compute the alignment of variable specified by DECL.
213 DONT_OUTPUT_DATA is from assemble_variable. */
214 extern void align_variable (tree decl
, bool dont_output_data
);
216 /* Queue for outputting something to declare an external symbol to the
217 assembler. (Most assemblers don't need this, so we normally output
218 nothing.) Do nothing if DECL is not external. */
219 extern void assemble_external (tree
);
221 /* Assemble code to leave SIZE bytes of zeros. */
222 extern void assemble_zeros (unsigned HOST_WIDE_INT
);
224 /* Assemble an alignment pseudo op for an ALIGN-bit boundary. */
225 extern void assemble_align (int);
227 /* Assemble a string constant with the specified C string as contents. */
228 extern void assemble_string (const char *, int);
230 /* Similar, for calling a library function FUN. */
231 extern void assemble_external_libcall (rtx
);
233 /* Assemble a label named NAME. */
234 extern void assemble_label (FILE *, const char *);
236 /* Output to FILE (an assembly file) a reference to NAME. If NAME
237 starts with a *, the rest of NAME is output verbatim. Otherwise
238 NAME is transformed in a target-specific way (usually by the
239 addition of an underscore). */
240 extern void assemble_name_raw (FILE *, const char *);
242 /* Like assemble_name_raw, but should be used when NAME might refer to
243 an entity that is also represented as a tree (like a function or
244 variable). If NAME does refer to such an entity, that entity will
245 be marked as referenced. */
246 extern void assemble_name (FILE *, const char *);
248 /* Return the assembler directive for creating a given kind of integer
249 object. SIZE is the number of bytes in the object and ALIGNED_P
250 indicates whether it is known to be aligned. Return NULL if the
251 assembly dialect has no such directive.
253 The returned string should be printed at the start of a new line and
254 be followed immediately by the object's initial value. */
255 extern const char *integer_asm_op (int, int);
257 /* Use directive OP to assemble an integer object X. Print OP at the
258 start of the line, followed immediately by the value of X. */
259 extern void assemble_integer_with_op (const char *, rtx
);
261 /* The default implementation of the asm_out.integer target hook. */
262 extern bool default_assemble_integer (rtx
, unsigned int, int);
264 /* Assemble the integer constant X into an object of SIZE bytes. ALIGN is
265 the alignment of the integer in bits. Return 1 if we were able to output
266 the constant, otherwise 0. If FORCE is nonzero the constant must
268 extern bool assemble_integer (rtx
, unsigned, unsigned, int);
270 /* An interface to assemble_integer for the common case in which a value is
271 fully aligned and must be printed. VALUE is the value of the integer
272 object and SIZE is the number of bytes it contains. */
273 #define assemble_aligned_integer(SIZE, VALUE) \
274 assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
276 #ifdef REAL_VALUE_TYPE_SIZE
277 /* Assemble the floating-point constant D into an object of size MODE. */
278 extern void assemble_real (REAL_VALUE_TYPE
, enum machine_mode
, unsigned);
281 /* Write the address of the entity given by SYMBOL to SEC. */
282 extern void assemble_addr_to_section (rtx
, section
*);
284 /* Return the size of the constant pool. */
285 extern int get_pool_size (void);
288 extern rtx
peephole (rtx
);
291 extern void output_shared_constant_pool (void);
293 extern void output_object_blocks (void);
295 /* Whether a constructor CTOR is a valid static constant initializer if all
296 its elements are. This used to be internal to initializer_constant_valid_p
297 and has been exposed to let other functions like categorize_ctor_elements
298 evaluate the property while walking a constructor for other purposes. */
300 extern bool constructor_static_from_elts_p (const_tree
);
302 /* Return nonzero if VALUE is a valid constant-valued expression
303 for use in initializing a static variable; one that can be an
304 element of a "constant" initializer.
306 Return null_pointer_node if the value is absolute;
307 if it is relocatable, return the variable that determines the relocation.
308 We assume that VALUE has been folded as much as possible;
309 therefore, we do not need to check for such things as
310 arithmetic-combinations of integers. */
311 extern tree
initializer_constant_valid_p (tree
, tree
);
313 /* Return true if VALUE is a valid constant-valued expression
314 for use in initializing a static bit-field; one that can be
315 an element of a "constant" initializer. */
316 extern bool initializer_constant_valid_for_bitfield_p (tree
);
318 /* Output assembler code for constant EXP to FILE, with no label.
319 This includes the pseudo-op such as ".int" or ".byte", and a newline.
320 Assumes output_addressed_constants has been done on EXP already.
322 Generate exactly SIZE bytes of assembler data, padding at the end
323 with zeros if necessary. SIZE must always be specified.
325 ALIGN is the alignment in bits that may be assumed for the data. */
326 extern void output_constant (tree
, unsigned HOST_WIDE_INT
, unsigned int);
328 /* When outputting delayed branch sequences, this rtx holds the
329 sequence being output. It is null when no delayed branch
330 sequence is being output, so it can be used as a test in the
333 This variable is defined in final.c. */
334 extern rtx final_sequence
;
336 /* The line number of the beginning of the current function. Various
337 md code needs this so that it can output relative linenumbers. */
339 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers. */
340 extern int sdb_begin_function_line
;
343 /* File in which assembler code is being written. */
346 extern FILE *asm_out_file
;
349 /* The first global object in the file. */
350 extern const char *first_global_object_name
;
352 /* The first weak object in the file. */
353 extern const char *weak_global_object_name
;
355 /* Nonzero if function being compiled doesn't contain any calls
356 (ignoring the prologue and epilogue). This is set prior to
357 local register allocation and is valid for the remaining
360 extern int current_function_is_leaf
;
362 /* Nonzero if function being compiled doesn't modify the stack pointer
363 (ignoring the prologue and epilogue). This is only valid after
364 pass_stack_ptr_mod has run. */
366 extern int current_function_sp_is_unchanging
;
368 /* Nonzero if the function being compiled is a leaf function which only
369 uses leaf registers. This is valid after reload (specifically after
370 sched2) and is useful only if the port defines LEAF_REGISTERS. */
372 extern int current_function_uses_only_leaf_regs
;
374 /* Default file in which to dump debug output. */
377 extern FILE *dump_file
;
380 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern. */
381 extern rtx current_insn_predicate
;
383 /* Last insn processed by final_scan_insn. */
384 extern rtx current_output_insn
;
386 /* Nonzero while outputting an `asm' with operands.
387 This means that inconsistencies are the user's fault, so don't die.
388 The precise value is the insn being output, to pass to error_for_asm. */
389 extern rtx this_is_asm_operands
;
391 /* Carry information from ASM_DECLARE_OBJECT_NAME
392 to ASM_FINISH_DECLARE_OBJECT. */
393 extern int size_directive_output
;
394 extern tree last_assemble_variable_decl
;
396 extern bool first_function_block_is_cold
;
398 /* Decide whether DECL needs to be in a writable section.
399 RELOC is the same as for SELECT_SECTION. */
400 extern bool decl_readonly_section (const_tree
, int);
402 /* This can be used to compute RELOC for the function above, when
403 given a constant expression. */
404 extern int compute_reloc_for_constant (tree
);
406 /* User label prefix in effect for this compilation. */
407 extern const char *user_label_prefix
;
409 /* Default target function prologue and epilogue assembler output. */
410 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT
);
412 /* Default target hook that outputs nothing to a stream. */
413 extern void no_asm_to_stream (FILE *);
415 /* Flags controlling properties of a section. */
416 #define SECTION_ENTSIZE 0x000ff /* entity size in section */
417 #define SECTION_CODE 0x00100 /* contains code */
418 #define SECTION_WRITE 0x00200 /* data is writable */
419 #define SECTION_DEBUG 0x00400 /* contains debug data */
420 #define SECTION_LINKONCE 0x00800 /* is linkonce */
421 #define SECTION_SMALL 0x01000 /* contains "small data" */
422 #define SECTION_BSS 0x02000 /* contains zeros only */
423 #define SECTION_FORGET 0x04000 /* forget that we've entered the section */
424 #define SECTION_MERGE 0x08000 /* contains mergeable data */
425 #define SECTION_STRINGS 0x10000 /* contains zero terminated strings without
427 #define SECTION_OVERRIDE 0x20000 /* allow override of default flags */
428 #define SECTION_TLS 0x40000 /* contains thread-local storage */
429 #define SECTION_NOTYPE 0x80000 /* don't output @progbits */
430 #define SECTION_DECLARED 0x100000 /* section has been used */
431 #define SECTION_STYLE_MASK 0x600000 /* bits used for SECTION_STYLE */
432 #define SECTION_COMMON 0x800000 /* contains common data */
433 #define SECTION_MACH_DEP 0x1000000 /* subsequent bits reserved for target */
435 /* This SECTION_STYLE is used for unnamed sections that we can switch
436 to using a special assembler directive. */
437 #define SECTION_UNNAMED 0x000000
439 /* This SECTION_STYLE is used for named sections that we can switch
440 to using a general section directive. */
441 #define SECTION_NAMED 0x200000
443 /* This SECTION_STYLE is used for sections that we cannot switch to at
444 all. The choice of section is implied by the directive that we use
445 to declare the object. */
446 #define SECTION_NOSWITCH 0x400000
448 /* A helper function for default_elf_select_section and
449 default_elf_unique_section. Categorizes the DECL. */
451 enum section_category
456 SECCAT_RODATA_MERGE_STR
,
457 SECCAT_RODATA_MERGE_STR_INIT
,
458 SECCAT_RODATA_MERGE_CONST
,
463 /* To optimize loading of shared programs, define following subsections
465 _REL Contains data that has relocations, so they get grouped
466 together and dynamic linker will visit fewer pages in memory.
467 _RO Contains data that is otherwise read-only. This is useful
468 with prelinking as most relocations won't be dynamically
469 linked and thus stay read only.
470 _LOCAL Marks data containing relocations only to local objects.
471 These relocations will get fully resolved by prelinking. */
473 SECCAT_DATA_REL_LOCAL
,
475 SECCAT_DATA_REL_RO_LOCAL
,
488 /* Information that is provided by all instances of the section type. */
489 struct GTY(()) section_common
{
490 /* The set of SECTION_* flags that apply to this section. */
494 /* Information about a SECTION_NAMED section. */
495 struct GTY(()) named_section
{
496 struct section_common common
;
498 /* The name of the section. */
501 /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
502 section is associated. */
506 /* A callback that writes the assembly code for switching to an unnamed
507 section. The argument provides callback-specific data. */
508 typedef void (*unnamed_section_callback
) (const void *);
510 /* Information about a SECTION_UNNAMED section. */
511 struct GTY(()) unnamed_section
{
512 struct section_common common
;
514 /* The callback used to switch to the section, and the data that
515 should be passed to the callback. */
516 unnamed_section_callback
GTY ((skip
)) callback
;
517 const void *GTY ((skip
)) data
;
519 /* The next entry in the chain of unnamed sections. */
523 /* A callback that writes the assembly code for a decl in a
524 SECTION_NOSWITCH section. DECL is the decl that should be assembled
525 and NAME is the name of its SYMBOL_REF. SIZE is the size of the decl
526 in bytes and ROUNDED is that size rounded up to the next
527 BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
529 Return true if the callback used DECL_ALIGN to set the object's
530 alignment. A false return value implies that we are relying
531 on the rounded size to align the decl. */
532 typedef bool (*noswitch_section_callback
) (tree decl
, const char *name
,
533 unsigned HOST_WIDE_INT size
,
534 unsigned HOST_WIDE_INT rounded
);
536 /* Information about a SECTION_NOSWITCH section. */
537 struct GTY(()) noswitch_section
{
538 struct section_common common
;
540 /* The callback used to assemble decls in this section. */
541 noswitch_section_callback
GTY ((skip
)) callback
;
544 /* Information about a section, which may be named or unnamed. */
545 union GTY ((desc ("SECTION_STYLE (&(%h))"))) section
{
546 struct section_common
GTY ((skip
)) common
;
547 struct named_section
GTY ((tag ("SECTION_NAMED"))) named
;
548 struct unnamed_section
GTY ((tag ("SECTION_UNNAMED"))) unnamed
;
549 struct noswitch_section
GTY ((tag ("SECTION_NOSWITCH"))) noswitch
;
552 /* Return the style of section SECT. */
553 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
557 /* Special well-known sections. */
558 extern GTY(()) section
*text_section
;
559 extern GTY(()) section
*data_section
;
560 extern GTY(()) section
*readonly_data_section
;
561 extern GTY(()) section
*sdata_section
;
562 extern GTY(()) section
*ctors_section
;
563 extern GTY(()) section
*dtors_section
;
564 extern GTY(()) section
*bss_section
;
565 extern GTY(()) section
*sbss_section
;
566 extern GTY(()) section
*exception_section
;
567 extern GTY(()) section
*eh_frame_section
;
568 extern GTY(()) section
*tls_comm_section
;
569 extern GTY(()) section
*comm_section
;
570 extern GTY(()) section
*lcomm_section
;
571 extern GTY(()) section
*bss_noswitch_section
;
573 extern GTY(()) section
*in_section
;
574 extern GTY(()) bool in_cold_section_p
;
576 extern section
*get_unnamed_section (unsigned int, void (*) (const void *),
578 extern section
*get_section (const char *, unsigned int, tree
);
579 extern section
*get_named_section (tree
, const char *, int);
580 extern void place_block_symbol (rtx
);
581 extern rtx
get_section_anchor (struct object_block
*, HOST_WIDE_INT
,
583 extern section
*mergeable_constant_section (enum machine_mode
,
584 unsigned HOST_WIDE_INT
,
586 extern section
*function_section (tree
);
587 extern section
*unlikely_text_section (void);
588 extern section
*current_function_section (void);
590 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
591 not) section for PRIORITY. */
592 extern section
*get_cdtor_priority_section (int, bool);
594 extern bool unlikely_text_section_p (section
*);
595 extern void switch_to_section (section
*);
596 extern void output_section_asm_op (const void *);
598 extern void default_asm_output_source_filename (FILE *, const char *);
599 extern void output_file_directive (FILE *, const char *);
601 extern unsigned int default_section_type_flags (tree
, const char *, int);
603 extern bool have_global_bss_p (void);
604 extern void default_no_named_section (const char *, unsigned int, tree
);
605 extern void default_elf_asm_named_section (const char *, unsigned int, tree
);
606 extern enum section_category
categorize_decl_for_section (const_tree
, int);
607 extern void default_coff_asm_named_section (const char *, unsigned int, tree
);
608 extern void default_pe_asm_named_section (const char *, unsigned int, tree
);
610 extern void default_stabs_asm_out_destructor (rtx
, int);
611 extern void default_named_section_asm_out_destructor (rtx
, int);
612 extern void default_dtor_section_asm_out_destructor (rtx
, int);
613 extern void default_stabs_asm_out_constructor (rtx
, int);
614 extern void default_named_section_asm_out_constructor (rtx
, int);
615 extern void default_ctor_section_asm_out_constructor (rtx
, int);
617 extern section
*default_select_section (tree
, int, unsigned HOST_WIDE_INT
);
618 extern section
*default_elf_select_section (tree
, int, unsigned HOST_WIDE_INT
);
619 extern void default_unique_section (tree
, int);
620 extern section
*default_function_rodata_section (tree
);
621 extern section
*default_no_function_rodata_section (tree
);
622 extern section
*default_select_rtx_section (enum machine_mode
, rtx
,
623 unsigned HOST_WIDE_INT
);
624 extern section
*default_elf_select_rtx_section (enum machine_mode
, rtx
,
625 unsigned HOST_WIDE_INT
);
626 extern void default_encode_section_info (tree
, rtx
, int);
627 extern const char *default_strip_name_encoding (const char *);
628 extern void default_asm_output_anchor (rtx
);
629 extern bool default_use_anchors_for_symbol_p (const_rtx
);
630 extern bool default_binds_local_p (const_tree
);
631 extern bool default_binds_local_p_1 (const_tree
, int);
632 extern void default_globalize_label (FILE *, const char *);
633 extern void default_globalize_decl_name (FILE *, tree
);
634 extern void default_emit_unwind_label (FILE *, tree
, int, int);
635 extern void default_emit_except_table_label (FILE *);
636 extern void default_internal_label (FILE *, const char *, unsigned long);
637 extern void default_asm_declare_constant_name (FILE *, const char *,
638 const_tree
, HOST_WIDE_INT
);
639 extern void default_file_start (void);
640 extern void file_end_indicate_exec_stack (void);
642 extern void default_elf_asm_output_external (FILE *file
, tree
,
644 extern int maybe_assemble_visibility (tree
);
646 extern int default_address_cost (rtx
, bool);
648 /* dbxout helper functions */
649 #if defined DBX_DEBUGGING_INFO || defined XCOFF_DEBUGGING_INFO
651 extern void dbxout_int (int);
652 extern void dbxout_stabd (int, int);
653 extern void dbxout_begin_stabn (int);
654 extern void dbxout_begin_stabn_sline (int);
655 extern void dbxout_begin_empty_stabs (int);
656 extern void dbxout_begin_simple_stabs (const char *, int);
657 extern void dbxout_begin_simple_stabs_desc (const char *, int, int);
659 extern void dbxout_stab_value_zero (void);
660 extern void dbxout_stab_value_label (const char *);
661 extern void dbxout_stab_value_label_diff (const char *, const char *);
662 extern void dbxout_stab_value_internal_label (const char *, int *);
663 extern void dbxout_stab_value_internal_label_diff (const char *, int *,
668 #endif /* ! GCC_OUTPUT_H */