2014-10-31 Richard Biener <rguenther@suse.de>
[official-gcc.git] / gcc / output.h
blobf213b9964297eebe5e47b1077018a81e03b73233
1 /* Declarations for insn-output.c and other code to write to asm_out_file.
2 These functions are defined in final.c, and varasm.c.
3 Copyright (C) 1987-2014 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
10 version.
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
21 #ifndef GCC_OUTPUT_H
22 #define GCC_OUTPUT_H
24 /* Initialize data in final at the beginning of a compilation. */
25 extern void init_final (const char *);
27 /* Enable APP processing of subsequent output.
28 Used before the output from an `asm' statement. */
29 extern void app_enable (void);
31 /* Disable APP processing of subsequent output.
32 Called from varasm.c before most kinds of output. */
33 extern void app_disable (void);
35 /* Return the number of slots filled in the current
36 delayed branch sequence (we don't count the insn needing the
37 delay slot). Zero if not in a delayed branch sequence. */
38 extern int dbr_sequence_length (void);
40 /* Indicate that branch shortening hasn't yet been done. */
41 extern void init_insn_lengths (void);
43 /* Obtain the current length of an insn. If branch shortening has been done,
44 get its actual length. Otherwise, get its maximum length. */
45 extern int get_attr_length (rtx_insn *);
47 /* Obtain the current length of an insn. If branch shortening has been done,
48 get its actual length. Otherwise, get its minimum length. */
49 extern int get_attr_min_length (rtx_insn *);
51 /* Make a pass over all insns and compute their actual lengths by shortening
52 any branches of variable length if possible. */
53 extern void shorten_branches (rtx_insn *);
55 const char *get_some_local_dynamic_name ();
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_insn *, 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_insn *, 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
74 be scanned. */
75 extern rtx_insn *final_scan_insn (rtx_insn *, FILE *, int, int, int *);
77 /* Replace a SUBREG with a REG or a MEM, based on the thing it is a
78 subreg of. */
79 extern rtx alter_subreg (rtx *, bool);
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_insn *);
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 #else
125 #define ATTRIBUTE_ASM_FPRINTF(m, n) ATTRIBUTE_NONNULL(m)
126 #endif
128 extern void fprint_whex (FILE *, unsigned HOST_WIDE_INT);
129 extern void fprint_ul (FILE *, unsigned long);
130 extern int sprint_ul (char *, unsigned long);
132 extern void asm_fprintf (FILE *file, const char *p, ...)
133 ATTRIBUTE_ASM_FPRINTF(2, 3);
135 /* Return nonzero if this function has no function calls. */
136 extern int leaf_function_p (void);
138 /* Return 1 if branch is a forward branch.
139 Uses insn_shuid array, so it works only in the final pass. May be used by
140 output templates to add branch prediction hints, for example. */
141 extern int final_forward_branch_p (rtx_insn *);
143 /* Return 1 if this function uses only the registers that can be
144 safely renumbered. */
145 extern int only_leaf_regs_used (void);
147 /* Scan IN_RTX and its subexpressions, and renumber all regs into those
148 available in leaf functions. */
149 extern void leaf_renumber_regs_insn (rtx);
151 /* Locate the proper template for the given insn-code. */
152 extern const char *get_insn_template (int, rtx);
154 /* Functions in varasm.c. */
156 /* Emit any pending weak declarations. */
157 extern void weak_finish (void);
159 /* Decode an `asm' spec for a declaration as a register name.
160 Return the register number, or -1 if nothing specified,
161 or -2 if the ASMSPEC is not `cc' or `memory' and is not recognized,
162 or -3 if ASMSPEC is `cc' and is not recognized,
163 or -4 if ASMSPEC is `memory' and is not recognized.
164 Accept an exact spelling or a decimal number.
165 Prefixes such as % are optional. */
166 extern int decode_reg_name (const char *);
168 /* Similar to decode_reg_name, but takes an extra parameter that is a
169 pointer to the number of (internal) registers described by the
170 external name. */
171 extern int decode_reg_name_and_count (const char *, int *);
173 extern void do_assemble_alias (tree, tree);
175 extern void default_assemble_visibility (tree, int);
177 /* Output a string of literal assembler code
178 for an `asm' keyword used between functions. */
179 extern void assemble_asm (tree);
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. */
185 extern void assemble_start_function (tree, const char *);
187 /* Output assembler code associated with defining the size of the
188 function. DECL describes the function. NAME is the function's name. */
189 extern void assemble_end_function (tree, const char *);
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.
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). */
200 extern void assemble_variable (tree, int, int, int);
202 /* Put the vtable verification constructor initialization function
203 into the preinit array. */
204 extern void assemble_vtv_preinit_initializer (tree);
206 /* Compute the alignment of variable specified by DECL.
207 DONT_OUTPUT_DATA is from assemble_variable. */
208 extern void align_variable (tree decl, bool dont_output_data);
210 /* Queue for outputting something to declare an external symbol to the
211 assembler. (Most assemblers don't need this, so we normally output
212 nothing.) Do nothing if DECL is not external. */
213 extern void assemble_external (tree);
215 /* Assemble code to leave SIZE bytes of zeros. */
216 extern void assemble_zeros (unsigned HOST_WIDE_INT);
218 /* Assemble an alignment pseudo op for an ALIGN-bit boundary. */
219 extern void assemble_align (int);
221 /* Assemble a string constant with the specified C string as contents. */
222 extern void assemble_string (const char *, int);
224 /* Similar, for calling a library function FUN. */
225 extern void assemble_external_libcall (rtx);
227 /* Assemble a label named NAME. */
228 extern void assemble_label (FILE *, const char *);
230 /* Output to FILE (an assembly file) a reference to NAME. If NAME
231 starts with a *, the rest of NAME is output verbatim. Otherwise
232 NAME is transformed in a target-specific way (usually by the
233 addition of an underscore). */
234 extern void assemble_name_raw (FILE *, const char *);
236 /* Like assemble_name_raw, but should be used when NAME might refer to
237 an entity that is also represented as a tree (like a function or
238 variable). If NAME does refer to such an entity, that entity will
239 be marked as referenced. */
240 extern void assemble_name (FILE *, const char *);
242 /* Return the assembler directive for creating a given kind of integer
243 object. SIZE is the number of bytes in the object and ALIGNED_P
244 indicates whether it is known to be aligned. Return NULL if the
245 assembly dialect has no such directive.
247 The returned string should be printed at the start of a new line and
248 be followed immediately by the object's initial value. */
249 extern const char *integer_asm_op (int, int);
251 /* Use directive OP to assemble an integer object X. Print OP at the
252 start of the line, followed immediately by the value of X. */
253 extern void assemble_integer_with_op (const char *, rtx);
255 /* The default implementation of the asm_out.integer target hook. */
256 extern bool default_assemble_integer (rtx, unsigned int, int);
258 /* Assemble the integer constant X into an object of SIZE bytes. ALIGN is
259 the alignment of the integer in bits. Return 1 if we were able to output
260 the constant, otherwise 0. If FORCE is nonzero the constant must
261 be outputable. */
262 extern bool assemble_integer (rtx, unsigned, unsigned, int);
264 /* Return section for TEXT_SECITON_NAME if DECL or DECL_SECTION_NAME (DECL)
265 is NULL. */
266 extern section *get_named_text_section (tree, const char *, const char *);
268 /* An interface to assemble_integer for the common case in which a value is
269 fully aligned and must be printed. VALUE is the value of the integer
270 object and SIZE is the number of bytes it contains. */
271 #define assemble_aligned_integer(SIZE, VALUE) \
272 assemble_integer (VALUE, SIZE, (SIZE) * BITS_PER_UNIT, 1)
274 #ifdef REAL_VALUE_TYPE_SIZE
275 /* Assemble the floating-point constant D into an object of size MODE. */
276 extern void assemble_real (REAL_VALUE_TYPE, machine_mode, unsigned);
277 #endif
279 /* Write the address of the entity given by SYMBOL to SEC. */
280 extern void assemble_addr_to_section (rtx, section *);
282 /* Return the size of the constant pool. */
283 extern int get_pool_size (void);
285 #ifdef HAVE_peephole
286 extern rtx_insn *peephole (rtx_insn *);
287 #endif
289 extern void output_shared_constant_pool (void);
291 extern void output_object_blocks (void);
293 extern void output_quoted_string (FILE *, const char *);
295 /* When outputting delayed branch sequences, this rtx holds the
296 sequence being output. It is null when no delayed branch
297 sequence is being output, so it can be used as a test in the
298 insn output code.
300 This variable is defined in final.c. */
301 extern rtx_sequence *final_sequence;
303 /* The line number of the beginning of the current function. Various
304 md code needs this so that it can output relative linenumbers. */
306 #ifdef SDB_DEBUGGING_INFO /* Avoid undef sym in certain broken linkers. */
307 extern int sdb_begin_function_line;
308 #endif
310 /* File in which assembler code is being written. */
312 #ifdef BUFSIZ
313 extern FILE *asm_out_file;
314 #endif
316 /* The first global object in the file. */
317 extern const char *first_global_object_name;
319 /* The first weak object in the file. */
320 extern const char *weak_global_object_name;
322 /* Nonnull if the insn currently being emitted was a COND_EXEC pattern. */
323 extern rtx current_insn_predicate;
325 /* Last insn processed by final_scan_insn. */
326 extern rtx_insn *current_output_insn;
328 /* Nonzero while outputting an `asm' with operands.
329 This means that inconsistencies are the user's fault, so don't die.
330 The precise value is the insn being output, to pass to error_for_asm. */
331 extern const rtx_insn *this_is_asm_operands;
333 /* Carry information from ASM_DECLARE_OBJECT_NAME
334 to ASM_FINISH_DECLARE_OBJECT. */
335 extern int size_directive_output;
336 extern tree last_assemble_variable_decl;
338 extern bool first_function_block_is_cold;
340 /* Decide whether DECL needs to be in a writable section.
341 RELOC is the same as for SELECT_SECTION. */
342 extern bool decl_readonly_section (const_tree, int);
344 /* This can be used to compute RELOC for the function above, when
345 given a constant expression. */
346 extern int compute_reloc_for_constant (tree);
348 /* User label prefix in effect for this compilation. */
349 extern const char *user_label_prefix;
351 /* Default target function prologue and epilogue assembler output. */
352 extern void default_function_pro_epilogue (FILE *, HOST_WIDE_INT);
354 /* Default target function switched text sections. */
355 extern void default_function_switched_text_sections (FILE *, tree, bool);
357 /* Default target hook that outputs nothing to a stream. */
358 extern void no_asm_to_stream (FILE *);
360 /* Flags controlling properties of a section. */
361 #define SECTION_ENTSIZE 0x000ff /* entity size in section */
362 #define SECTION_CODE 0x00100 /* contains code */
363 #define SECTION_WRITE 0x00200 /* data is writable */
364 #define SECTION_DEBUG 0x00400 /* contains debug data */
365 #define SECTION_LINKONCE 0x00800 /* is linkonce */
366 #define SECTION_SMALL 0x01000 /* contains "small data" */
367 #define SECTION_BSS 0x02000 /* contains zeros only */
368 #define SECTION_FORGET 0x04000 /* forget that we've entered the section */
369 #define SECTION_MERGE 0x08000 /* contains mergeable data */
370 #define SECTION_STRINGS 0x10000 /* contains zero terminated strings without
371 embedded zeros */
372 #define SECTION_OVERRIDE 0x20000 /* allow override of default flags */
373 #define SECTION_TLS 0x40000 /* contains thread-local storage */
374 #define SECTION_NOTYPE 0x80000 /* don't output @progbits */
375 #define SECTION_DECLARED 0x100000 /* section has been used */
376 #define SECTION_STYLE_MASK 0x600000 /* bits used for SECTION_STYLE */
377 #define SECTION_COMMON 0x800000 /* contains common data */
378 #define SECTION_RELRO 0x1000000 /* data is readonly after relocation processing */
379 #define SECTION_EXCLUDE 0x2000000 /* discarded by the linker */
380 #define SECTION_MACH_DEP 0x4000000 /* subsequent bits reserved for target */
382 /* This SECTION_STYLE is used for unnamed sections that we can switch
383 to using a special assembler directive. */
384 #define SECTION_UNNAMED 0x000000
386 /* This SECTION_STYLE is used for named sections that we can switch
387 to using a general section directive. */
388 #define SECTION_NAMED 0x200000
390 /* This SECTION_STYLE is used for sections that we cannot switch to at
391 all. The choice of section is implied by the directive that we use
392 to declare the object. */
393 #define SECTION_NOSWITCH 0x400000
395 /* A helper function for default_elf_select_section and
396 default_elf_unique_section. Categorizes the DECL. */
398 enum section_category
400 SECCAT_TEXT,
402 SECCAT_RODATA,
403 SECCAT_RODATA_MERGE_STR,
404 SECCAT_RODATA_MERGE_STR_INIT,
405 SECCAT_RODATA_MERGE_CONST,
406 SECCAT_SRODATA,
408 SECCAT_DATA,
410 /* To optimize loading of shared programs, define following subsections
411 of data section:
412 _REL Contains data that has relocations, so they get grouped
413 together and dynamic linker will visit fewer pages in memory.
414 _RO Contains data that is otherwise read-only. This is useful
415 with prelinking as most relocations won't be dynamically
416 linked and thus stay read only.
417 _LOCAL Marks data containing relocations only to local objects.
418 These relocations will get fully resolved by prelinking. */
419 SECCAT_DATA_REL,
420 SECCAT_DATA_REL_LOCAL,
421 SECCAT_DATA_REL_RO,
422 SECCAT_DATA_REL_RO_LOCAL,
424 SECCAT_SDATA,
425 SECCAT_TDATA,
427 SECCAT_BSS,
428 SECCAT_SBSS,
429 SECCAT_TBSS
432 /* Information that is provided by all instances of the section type. */
433 struct GTY(()) section_common {
434 /* The set of SECTION_* flags that apply to this section. */
435 unsigned int flags;
438 /* Information about a SECTION_NAMED section. */
439 struct GTY(()) named_section {
440 struct section_common common;
442 /* The name of the section. */
443 const char *name;
445 /* If nonnull, the VAR_DECL or FUNCTION_DECL with which the
446 section is associated. */
447 tree decl;
450 /* A callback that writes the assembly code for switching to an unnamed
451 section. The argument provides callback-specific data. */
452 typedef void (*unnamed_section_callback) (const void *);
454 /* Information about a SECTION_UNNAMED section. */
455 struct GTY(()) unnamed_section {
456 struct section_common common;
458 /* The callback used to switch to the section, and the data that
459 should be passed to the callback. */
460 unnamed_section_callback GTY ((skip)) callback;
461 const void *GTY ((skip)) data;
463 /* The next entry in the chain of unnamed sections. */
464 section *next;
467 /* A callback that writes the assembly code for a decl in a
468 SECTION_NOSWITCH section. DECL is the decl that should be assembled
469 and NAME is the name of its SYMBOL_REF. SIZE is the size of the decl
470 in bytes and ROUNDED is that size rounded up to the next
471 BIGGEST_ALIGNMENT / BITS_PER_UNIT boundary.
473 Return true if the callback used DECL_ALIGN to set the object's
474 alignment. A false return value implies that we are relying
475 on the rounded size to align the decl. */
476 typedef bool (*noswitch_section_callback) (tree decl, const char *name,
477 unsigned HOST_WIDE_INT size,
478 unsigned HOST_WIDE_INT rounded);
480 /* Information about a SECTION_NOSWITCH section. */
481 struct GTY(()) noswitch_section {
482 struct section_common common;
484 /* The callback used to assemble decls in this section. */
485 noswitch_section_callback GTY ((skip)) callback;
488 /* Information about a section, which may be named or unnamed. */
489 union GTY ((desc ("SECTION_STYLE (&(%h))"), for_user)) section {
490 struct section_common GTY ((skip)) common;
491 struct named_section GTY ((tag ("SECTION_NAMED"))) named;
492 struct unnamed_section GTY ((tag ("SECTION_UNNAMED"))) unnamed;
493 struct noswitch_section GTY ((tag ("SECTION_NOSWITCH"))) noswitch;
496 /* Return the style of section SECT. */
497 #define SECTION_STYLE(SECT) ((SECT)->common.flags & SECTION_STYLE_MASK)
499 struct object_block;
501 /* Special well-known sections. */
502 extern GTY(()) section *text_section;
503 extern GTY(()) section *data_section;
504 extern GTY(()) section *readonly_data_section;
505 extern GTY(()) section *sdata_section;
506 extern GTY(()) section *ctors_section;
507 extern GTY(()) section *dtors_section;
508 extern GTY(()) section *bss_section;
509 extern GTY(()) section *sbss_section;
510 extern GTY(()) section *exception_section;
511 extern GTY(()) section *eh_frame_section;
512 extern GTY(()) section *tls_comm_section;
513 extern GTY(()) section *comm_section;
514 extern GTY(()) section *lcomm_section;
515 extern GTY(()) section *bss_noswitch_section;
517 extern GTY(()) section *in_section;
518 extern GTY(()) bool in_cold_section_p;
520 extern section *get_unnamed_section (unsigned int, void (*) (const void *),
521 const void *);
522 extern section *get_section (const char *, unsigned int, tree);
523 extern section *get_named_section (tree, const char *, int);
524 extern section *get_variable_section (tree, bool);
525 extern void place_block_symbol (rtx);
526 extern rtx get_section_anchor (struct object_block *, HOST_WIDE_INT,
527 enum tls_model);
528 extern section *mergeable_constant_section (machine_mode,
529 unsigned HOST_WIDE_INT,
530 unsigned int);
531 extern section *function_section (tree);
532 extern section *unlikely_text_section (void);
533 extern section *current_function_section (void);
535 /* Return the numbered .ctors.N (if CONSTRUCTOR_P) or .dtors.N (if
536 not) section for PRIORITY. */
537 extern section *get_cdtor_priority_section (int, bool);
539 extern bool unlikely_text_section_p (section *);
540 extern void switch_to_section (section *);
541 extern void output_section_asm_op (const void *);
543 extern void record_tm_clone_pair (tree, tree);
544 extern void finish_tm_clone_pairs (void);
545 extern tree get_tm_clone_pair (tree);
547 extern void default_asm_output_source_filename (FILE *, const char *);
548 extern void output_file_directive (FILE *, const char *);
550 extern unsigned int default_section_type_flags (tree, const char *, int);
552 extern bool have_global_bss_p (void);
553 extern bool bss_initializer_p (const_tree);
555 extern void default_no_named_section (const char *, unsigned int, tree);
556 extern void default_elf_asm_named_section (const char *, unsigned int, tree);
557 extern enum section_category categorize_decl_for_section (const_tree, int);
558 extern void default_coff_asm_named_section (const char *, unsigned int, tree);
559 extern void default_pe_asm_named_section (const char *, unsigned int, tree);
561 extern void default_named_section_asm_out_destructor (rtx, int);
562 extern void default_dtor_section_asm_out_destructor (rtx, int);
563 extern void default_named_section_asm_out_constructor (rtx, int);
564 extern void default_ctor_section_asm_out_constructor (rtx, int);
566 extern section *default_select_section (tree, int, unsigned HOST_WIDE_INT);
567 extern section *default_elf_select_section (tree, int, unsigned HOST_WIDE_INT);
568 extern void default_unique_section (tree, int);
569 extern section *default_function_rodata_section (tree);
570 extern section *default_no_function_rodata_section (tree);
571 extern section *default_clone_table_section (void);
572 extern section *default_select_rtx_section (machine_mode, rtx,
573 unsigned HOST_WIDE_INT);
574 extern section *default_elf_select_rtx_section (machine_mode, rtx,
575 unsigned HOST_WIDE_INT);
576 extern void default_encode_section_info (tree, rtx, int);
577 extern const char *default_strip_name_encoding (const char *);
578 extern void default_asm_output_anchor (rtx);
579 extern bool default_use_anchors_for_symbol_p (const_rtx);
580 extern bool default_binds_local_p (const_tree);
581 extern bool default_binds_local_p_1 (const_tree, int);
582 extern void default_globalize_label (FILE *, const char *);
583 extern void default_globalize_decl_name (FILE *, tree);
584 extern void default_emit_unwind_label (FILE *, tree, int, int);
585 extern void default_emit_except_table_label (FILE *);
586 extern void default_generate_internal_label (char *, const char *,
587 unsigned long);
588 extern void default_internal_label (FILE *, const char *, unsigned long);
589 extern void default_asm_declare_constant_name (FILE *, const char *,
590 const_tree, HOST_WIDE_INT);
591 extern void default_file_start (void);
592 extern void file_end_indicate_exec_stack (void);
593 extern void file_end_indicate_split_stack (void);
595 extern void default_elf_asm_output_external (FILE *file, tree,
596 const char *);
597 extern void default_elf_asm_output_limited_string (FILE *, const char *);
598 extern void default_elf_asm_output_ascii (FILE *, const char *, unsigned int);
599 extern void default_elf_internal_label (FILE *, const char *, unsigned long);
601 extern void default_elf_init_array_asm_out_constructor (rtx, int);
602 extern void default_elf_fini_array_asm_out_destructor (rtx, int);
603 extern int maybe_assemble_visibility (tree);
605 extern int default_address_cost (rtx, machine_mode, addr_space_t, bool);
607 /* Output stack usage information. */
608 extern void output_stack_usage (void);
610 #endif /* ! GCC_OUTPUT_H */