Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[dragonfly.git] / contrib / gcc-3.4 / gcc / function.h
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003757ed
MD
1/* Structure for saving state for a nested function.
2 Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2003, 2004 Free Software Foundation, Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License
18along with GCC; see the file COPYING. If not, write to the Free
19Software Foundation, 59 Temple Place - Suite 330, Boston, MA
2002111-1307, USA. */
21
22#ifndef GCC_FUNCTION_H
23#define GCC_FUNCTION_H
24
25struct var_refs_queue GTY(())
26{
27 rtx modified;
28 enum machine_mode promoted_mode;
29 int unsignedp;
30 struct var_refs_queue *next;
31};
32
33/* Stack of pending (incomplete) sequences saved by `start_sequence'.
34 Each element describes one pending sequence.
35 The main insn-chain is saved in the last element of the chain,
36 unless the chain is empty. */
37
38struct sequence_stack GTY(())
39{
40 /* First and last insns in the chain of the saved sequence. */
41 rtx first;
42 rtx last;
43 tree sequence_rtl_expr;
44 struct sequence_stack *next;
45};
46
47extern struct sequence_stack *sequence_stack;
48
49/* Stack of single obstacks. */
50
51struct simple_obstack_stack
52{
53 struct obstack *obstack;
54 struct simple_obstack_stack *next;
55};
56\f
57struct emit_status GTY(())
58{
59 /* This is reset to LAST_VIRTUAL_REGISTER + 1 at the start of each function.
60 After rtl generation, it is 1 plus the largest register number used. */
61 int x_reg_rtx_no;
62
63 /* Lowest label number in current function. */
64 int x_first_label_num;
65
66 /* The ends of the doubly-linked chain of rtl for the current function.
67 Both are reset to null at the start of rtl generation for the function.
68
69 start_sequence saves both of these on `sequence_stack' along with
70 `sequence_rtl_expr' and then starts a new, nested sequence of insns. */
71 rtx x_first_insn;
72 rtx x_last_insn;
73
74 /* RTL_EXPR within which the current sequence will be placed. Use to
75 prevent reuse of any temporaries within the sequence until after the
76 RTL_EXPR is emitted. */
77 tree sequence_rtl_expr;
78
79 /* Stack of pending (incomplete) sequences saved by `start_sequence'.
80 Each element describes one pending sequence.
81 The main insn-chain is saved in the last element of the chain,
82 unless the chain is empty. */
83 struct sequence_stack *sequence_stack;
84
85 /* INSN_UID for next insn emitted.
86 Reset to 1 for each function compiled. */
87 int x_cur_insn_uid;
88
89 /* Location the last line-number NOTE emitted.
90 This is used to avoid generating duplicates. */
91 location_t x_last_location;
92
93 /* The length of the regno_pointer_align, regno_decl, and x_regno_reg_rtx
94 vectors. Since these vectors are needed during the expansion phase when
95 the total number of registers in the function is not yet known, the
96 vectors are copied and made bigger when necessary. */
97 int regno_pointer_align_length;
98
99 /* Indexed by pseudo register number, if nonzero gives the known alignment
100 for that pseudo (if REG_POINTER is set in x_regno_reg_rtx).
101 Allocated in parallel with x_regno_reg_rtx. */
102 unsigned char * GTY ((length ("%h.x_reg_rtx_no")))
103 regno_pointer_align;
104
105 /* Indexed by pseudo register number, gives the rtx for that pseudo.
106 Allocated in parallel with regno_pointer_align.
107
108 Note MEM expressions can appear in this array due to the actions
109 of put_var_into_stack. */
110 rtx * GTY ((length ("%h.x_reg_rtx_no"))) x_regno_reg_rtx;
111};
112
113/* For backward compatibility... eventually these should all go away. */
114#define reg_rtx_no (cfun->emit->x_reg_rtx_no)
115#define seq_rtl_expr (cfun->emit->sequence_rtl_expr)
116#define regno_reg_rtx (cfun->emit->x_regno_reg_rtx)
117#define seq_stack (cfun->emit->sequence_stack)
118
119#define REGNO_POINTER_ALIGN(REGNO) (cfun->emit->regno_pointer_align[REGNO])
120
121struct expr_status GTY(())
122{
123 /* Number of units that we should eventually pop off the stack.
124 These are the arguments to function calls that have already returned. */
125 int x_pending_stack_adjust;
126
127 /* Under some ABIs, it is the caller's responsibility to pop arguments
128 pushed for function calls. A naive implementation would simply pop
129 the arguments immediately after each call. However, if several
130 function calls are made in a row, it is typically cheaper to pop
131 all the arguments after all of the calls are complete since a
132 single pop instruction can be used. Therefore, GCC attempts to
133 defer popping the arguments until absolutely necessary. (For
134 example, at the end of a conditional, the arguments must be popped,
135 since code outside the conditional won't know whether or not the
136 arguments need to be popped.)
137
138 When INHIBIT_DEFER_POP is nonzero, however, the compiler does not
139 attempt to defer pops. Instead, the stack is popped immediately
140 after each call. Rather then setting this variable directly, use
141 NO_DEFER_POP and OK_DEFER_POP. */
142 int x_inhibit_defer_pop;
143
144 /* If PREFERRED_STACK_BOUNDARY and PUSH_ROUNDING are defined, the stack
145 boundary can be momentarily unaligned while pushing the arguments.
146 Record the delta since last aligned boundary here in order to get
147 stack alignment in the nested function calls working right. */
148 int x_stack_pointer_delta;
149
150 /* Nonzero means __builtin_saveregs has already been done in this function.
151 The value is the pseudoreg containing the value __builtin_saveregs
152 returned. */
153 rtx x_saveregs_value;
154
155 /* Similarly for __builtin_apply_args. */
156 rtx x_apply_args_value;
157
158 /* List of labels that must never be deleted. */
159 rtx x_forced_labels;
160
161 /* Postincrements that still need to be expanded. */
162 rtx x_pending_chain;
163};
164
165#define pending_stack_adjust (cfun->expr->x_pending_stack_adjust)
166#define inhibit_defer_pop (cfun->expr->x_inhibit_defer_pop)
167#define saveregs_value (cfun->expr->x_saveregs_value)
168#define apply_args_value (cfun->expr->x_apply_args_value)
169#define forced_labels (cfun->expr->x_forced_labels)
170#define pending_chain (cfun->expr->x_pending_chain)
171#define stack_pointer_delta (cfun->expr->x_stack_pointer_delta)
172
173/* This structure can save all the important global and static variables
174 describing the status of the current function. */
175
176struct function GTY(())
177{
178 struct eh_status *eh;
179 struct stmt_status *stmt;
180 struct expr_status *expr;
181 struct emit_status *emit;
182 struct varasm_status *varasm;
183
184 /* For function.c. */
185
186 /* Points to the FUNCTION_DECL of this function. */
187 tree decl;
188
189 /* Function containing this function, if any. */
190 struct function *outer;
191
192 /* Number of bytes of args popped by function being compiled on its return.
193 Zero if no bytes are to be popped.
194 May affect compilation of return insn or of function epilogue. */
195 int pops_args;
196
197 /* If function's args have a fixed size, this is that size, in bytes.
198 Otherwise, it is -1.
199 May affect compilation of return insn or of function epilogue. */
200 int args_size;
201
202 /* # bytes the prologue should push and pretend that the caller pushed them.
203 The prologue must do this, but only if parms can be passed in
204 registers. */
205 int pretend_args_size;
206
207 /* # of bytes of outgoing arguments. If ACCUMULATE_OUTGOING_ARGS is
208 defined, the needed space is pushed by the prologue. */
209 int outgoing_args_size;
210
211 /* This is the offset from the arg pointer to the place where the first
212 anonymous arg can be found, if there is one. */
213 rtx arg_offset_rtx;
214
215 /* Quantities of various kinds of registers
216 used for the current function's args. */
217 CUMULATIVE_ARGS args_info;
218
219 /* If nonzero, an RTL expression for the location at which the current
220 function returns its result. If the current function returns its
221 result in a register, current_function_return_rtx will always be
222 the hard register containing the result. */
223 rtx return_rtx;
224
225 /* The arg pointer hard register, or the pseudo into which it was copied. */
226 rtx internal_arg_pointer;
227
228 /* Language-specific reason why the current function cannot be made
229 inline. */
230 const char *cannot_inline;
231
232 /* Opaque pointer used by get_hard_reg_initial_val and
233 has_hard_reg_initial_val (see integrate.[hc]). */
234 struct initial_value_struct *hard_reg_initial_vals;
235
236 /* Number of function calls seen so far in current function. */
237 int x_function_call_count;
238
239 /* List (chain of TREE_LIST) of LABEL_DECLs for all nonlocal labels
240 (labels to which there can be nonlocal gotos from nested functions)
241 in this function. */
242 tree x_nonlocal_labels;
243
244 /* List (chain of EXPR_LIST) of stack slots that hold the current handlers
245 for nonlocal gotos. There is one for every nonlocal label in the
246 function; this list matches the one in nonlocal_labels.
247 Zero when function does not have nonlocal labels. */
248 rtx x_nonlocal_goto_handler_slots;
249
250 /* List (chain of EXPR_LIST) of labels heading the current handlers for
251 nonlocal gotos. */
252 rtx x_nonlocal_goto_handler_labels;
253
254 /* RTX for stack slot that holds the stack pointer value to restore
255 for a nonlocal goto.
256 Zero when function does not have nonlocal labels. */
257 rtx x_nonlocal_goto_stack_level;
258
259 /* Label that will go on parm cleanup code, if any.
260 Jumping to this label runs cleanup code for parameters, if
261 such code must be run. Following this code is the logical return
262 label. */
263 rtx x_cleanup_label;
264
265 /* Label that will go on function epilogue.
266 Jumping to this label serves as a "return" instruction
267 on machines which require execution of the epilogue on all returns. */
268 rtx x_return_label;
269
270 /* Label that will go on the end of function epilogue.
271 Jumping to this label serves as a "naked return" instruction
272 on machines which require execution of the epilogue on all returns. */
273 rtx x_naked_return_label;
274
275 /* Label and register for unswitching computed gotos. */
276 rtx computed_goto_common_label;
277 rtx computed_goto_common_reg;
278
279 /* List (chain of EXPR_LISTs) of pseudo-regs of SAVE_EXPRs.
280 So we can mark them all live at the end of the function, if nonopt. */
281 rtx x_save_expr_regs;
282
283 /* List (chain of EXPR_LISTs) of all stack slots in this function.
284 Made for the sake of unshare_all_rtl. */
285 rtx x_stack_slot_list;
286
287 /* Chain of all RTL_EXPRs that have insns in them. */
288 tree x_rtl_expr_chain;
289
290 /* Label to jump back to for tail recursion, or 0 if we have
291 not yet needed one for this function. */
292 rtx x_tail_recursion_label;
293
294 /* Place after which to insert the tail_recursion_label if we need one. */
295 rtx x_tail_recursion_reentry;
296
297 /* Location at which to save the argument pointer if it will need to be
298 referenced. There are two cases where this is done: if nonlocal gotos
299 exist, or if vars stored at an offset from the argument pointer will be
300 needed by inner routines. */
301 rtx x_arg_pointer_save_area;
302
303 /* If the function returns non-void, we will emit a clobber of the
304 return registers just in case the user fell off the end without
305 returning a proper value. This is that insn. */
306 rtx x_clobber_return_insn;
307
308 /* Offset to end of allocated area of stack frame.
309 If stack grows down, this is the address of the last stack slot allocated.
310 If stack grows up, this is the address for the next slot. */
311 HOST_WIDE_INT x_frame_offset;
312
313 /* List (chain of TREE_LISTs) of static chains for containing functions.
314 Each link has a FUNCTION_DECL in the TREE_PURPOSE and a reg rtx
315 in an RTL_EXPR in the TREE_VALUE. */
316 tree x_context_display;
317
318 /* List (chain of TREE_LISTs) of trampolines for nested functions.
319 The trampoline sets up the static chain and jumps to the function.
320 We supply the trampoline's address when the function's address is
321 requested.
322
323 Each link has a FUNCTION_DECL in the TREE_PURPOSE and a reg rtx
324 in an RTL_EXPR in the TREE_VALUE. */
325 tree x_trampoline_list;
326
327 /* Insn after which register parms and SAVE_EXPRs are born, if nonopt. */
328 rtx x_parm_birth_insn;
329
330 /* Last insn of those whose job was to put parms into their nominal
331 homes. */
332 rtx x_last_parm_insn;
333
334 /* 1 + last pseudo register number possibly used for loading a copy
335 of a parameter of this function. */
336 unsigned int x_max_parm_reg;
337
338 /* Vector indexed by REGNO, containing location on stack in which
339 to put the parm which is nominally in pseudo register REGNO,
340 if we discover that that parm must go in the stack. The highest
341 element in this vector is one less than MAX_PARM_REG, above. */
342 rtx * GTY ((length ("%h.x_max_parm_reg"))) x_parm_reg_stack_loc;
343
344 /* List of all temporaries allocated, both available and in use. */
345 struct temp_slot *x_temp_slots;
346
347 /* Current nesting level for temporaries. */
348 int x_temp_slot_level;
349
350 /* Current nesting level for variables in a block. */
351 int x_var_temp_slot_level;
352
353 /* When temporaries are created by TARGET_EXPRs, they are created at
354 this level of temp_slot_level, so that they can remain allocated
355 until no longer needed. CLEANUP_POINT_EXPRs define the lifetime
356 of TARGET_EXPRs. */
357 int x_target_temp_slot_level;
358
359 /* This slot is initialized as 0 and is added to
360 during the nested function. */
361 struct var_refs_queue *fixup_var_refs_queue;
362
363 /* For integrate.c. */
364 int inlinable;
365 int no_debugging_symbols;
366 rtvec original_arg_vector;
367 tree original_decl_initial;
368 /* Last insn of those whose job was to put parms into their nominal
369 homes. */
370 rtx inl_last_parm_insn;
371 /* Highest label number in current function. */
372 int inl_max_label_num;
373
374 /* Function sequence number for profiling, debugging, etc. */
375 int funcdef_no;
376
377 /* For md files. */
378
379 /* tm.h can use this to store whatever it likes. */
380 struct machine_function * GTY ((maybe_undef (""))) machine;
381 /* The largest alignment of slot allocated on the stack. */
382 int stack_alignment_needed;
383 /* Preferred alignment of the end of stack frame. */
384 int preferred_stack_boundary;
385 /* Set when the call to function itself has been emit. */
386 bool recursive_call_emit;
387
388 /* Language-specific code can use this to store whatever it likes. */
389 struct language_function * language;
390
391 /* For reorg. */
392
393 /* If some insns can be deferred to the delay slots of the epilogue, the
394 delay list for them is recorded here. */
395 rtx epilogue_delay_list;
396
397 /* How commonly executed the function is. Initialized during branch
398 probabilities pass. */
399 enum function_frequency {
400 /* This function most likely won't be executed at all.
401 (set only when profile feedback is available). */
402 FUNCTION_FREQUENCY_UNLIKELY_EXECUTED,
403 /* The default value. */
404 FUNCTION_FREQUENCY_NORMAL,
405 /* Optimize this function hard
406 (set only when profile feedback is available). */
407 FUNCTION_FREQUENCY_HOT
408 } function_frequency;
409
410 /* Maximal number of entities in the single jumptable. Used to estimate
411 final flowgraph size. */
412 int max_jumptable_ents;
413
414 /* Collected bit flags. */
415
416 /* Nonzero if function being compiled needs to be given an address
417 where the value should be stored. */
418 unsigned int returns_struct : 1;
419
420 /* Nonzero if function being compiled needs to
421 return the address of where it has put a structure value. */
422 unsigned int returns_pcc_struct : 1;
423
424 /* Nonzero if the current function returns a pointer type. */
425 unsigned int returns_pointer : 1;
426
427 /* Nonzero if function being compiled needs to be passed a static chain. */
428 unsigned int needs_context : 1;
429
430 /* Nonzero if function being compiled can call setjmp. */
431 unsigned int calls_setjmp : 1;
432
433 /* Nonzero if function being compiled can call longjmp. */
434 unsigned int calls_longjmp : 1;
435
436 /* Nonzero if function being compiled can call alloca,
437 either as a subroutine or builtin. */
438 unsigned int calls_alloca : 1;
439
440 /* Nonzero if the function calls __builtin_eh_return. */
441 unsigned int calls_eh_return : 1;
442
443 /* Nonzero if the function calls __builtin_constant_p. */
444 unsigned int calls_constant_p : 1;
445
446 /* Nonzero if function being compiled receives nonlocal gotos
447 from nested functions. */
448 unsigned int has_nonlocal_label : 1;
449
450 /* Nonzero if function being compiled has nonlocal gotos to parent
451 function. */
452 unsigned int has_nonlocal_goto : 1;
453
454 /* Nonzero if function being compiled contains nested functions. */
455 unsigned int contains_functions : 1;
456
457 /* Nonzero if the function being compiled issues a computed jump. */
458 unsigned int has_computed_jump : 1;
459
460 /* Nonzero if the current function is a thunk, i.e., a lightweight
461 function implemented by the output_mi_thunk hook) that just
462 adjusts one of its arguments and forwards to another
463 function. */
464 unsigned int is_thunk : 1;
465
466 /* This bit is used by the exception handling logic. It is set if all
467 calls (if any) are sibling calls. Such functions do not have to
468 have EH tables generated, as they cannot throw. A call to such a
469 function, however, should be treated as throwing if any of its callees
470 can throw. */
471 unsigned int all_throwers_are_sibcalls : 1;
472
473 /* Nonzero if instrumentation calls for function entry and exit should be
474 generated. */
475 unsigned int instrument_entry_exit : 1;
476
477 /* Nonzero if profiling code should be generated. */
478 unsigned int profile : 1;
479
480 /* Nonzero if stack limit checking should be enabled in the current
481 function. */
482 unsigned int limit_stack : 1;
483
484 /* Nonzero if current function uses stdarg.h or equivalent. */
485 unsigned int stdarg : 1;
486
487 /* Nonzero if this function is being processed in function-at-a-time
488 mode. In other words, if all tree structure for this function,
489 including the BLOCK tree, is created before RTL generation
490 commences. */
491 unsigned int x_whole_function_mode_p : 1;
492
493 /* Nonzero if the back-end should not keep track of expressions that
494 determine the size of variable-sized objects. Normally, such
495 expressions are saved away, and then expanded when the next
496 function is started. For example, if a parameter has a
497 variable-sized type, then the size of the parameter is computed
498 when the function body is entered. However, some front-ends do
499 not desire this behavior. */
500 unsigned int x_dont_save_pending_sizes_p : 1;
501
502 /* Nonzero if the current function uses the constant pool. */
503 unsigned int uses_const_pool : 1;
504
505 /* Nonzero if the current function uses pic_offset_table_rtx. */
506 unsigned int uses_pic_offset_table : 1;
507
508 /* Nonzero if the current function needs an lsda for exception handling. */
509 unsigned int uses_eh_lsda : 1;
510
511 /* Nonzero if code to initialize arg_pointer_save_area has been emitted. */
512 unsigned int arg_pointer_save_area_init : 1;
513
514 /* Flag for use by ther rtl inliner, to tell if the function has been
515 processed at least once. */
516 unsigned int rtl_inline_init : 1;
517
518 /* Nonzero if the rtl inliner has saved the function for inlining. */
519 unsigned int saved_for_inline : 1;
520};
521
522/* The function currently being compiled. */
523extern GTY(()) struct function *cfun;
524
525/* Pointer to chain of `struct function' for containing functions. */
526extern GTY(()) struct function *outer_function_chain;
527
528/* Nonzero if we've already converted virtual regs to hard regs. */
529extern int virtuals_instantiated;
530
531/* Nonzero if at least one trampoline has been created. */
532extern int trampolines_created;
533
534/* For backward compatibility... eventually these should all go away. */
535#define current_function_pops_args (cfun->pops_args)
536#define current_function_returns_struct (cfun->returns_struct)
537#define current_function_returns_pcc_struct (cfun->returns_pcc_struct)
538#define current_function_returns_pointer (cfun->returns_pointer)
539#define current_function_needs_context (cfun->needs_context)
540#define current_function_calls_setjmp (cfun->calls_setjmp)
541#define current_function_calls_alloca (cfun->calls_alloca)
542#define current_function_calls_longjmp (cfun->calls_longjmp)
543#define current_function_calls_eh_return (cfun->calls_eh_return)
544#define current_function_calls_constant_p (cfun->calls_constant_p)
545#define current_function_has_computed_jump (cfun->has_computed_jump)
546#define current_function_contains_functions (cfun->contains_functions)
547#define current_function_is_thunk (cfun->is_thunk)
548#define current_function_args_info (cfun->args_info)
549#define current_function_args_size (cfun->args_size)
550#define current_function_pretend_args_size (cfun->pretend_args_size)
551#define current_function_outgoing_args_size (cfun->outgoing_args_size)
552#define current_function_arg_offset_rtx (cfun->arg_offset_rtx)
553#define current_function_stdarg (cfun->stdarg)
554#define current_function_internal_arg_pointer (cfun->internal_arg_pointer)
555#define current_function_return_rtx (cfun->return_rtx)
556#define current_function_instrument_entry_exit (cfun->instrument_entry_exit)
557#define current_function_profile (cfun->profile)
558#define current_function_funcdef_no (cfun->funcdef_no)
559#define current_function_limit_stack (cfun->limit_stack)
560#define current_function_uses_pic_offset_table (cfun->uses_pic_offset_table)
561#define current_function_uses_const_pool (cfun->uses_const_pool)
562#define current_function_cannot_inline (cfun->cannot_inline)
563#define current_function_epilogue_delay_list (cfun->epilogue_delay_list)
564#define current_function_has_nonlocal_label (cfun->has_nonlocal_label)
565#define current_function_has_nonlocal_goto (cfun->has_nonlocal_goto)
566
567#define max_parm_reg (cfun->x_max_parm_reg)
568#define parm_reg_stack_loc (cfun->x_parm_reg_stack_loc)
569#define cleanup_label (cfun->x_cleanup_label)
570#define return_label (cfun->x_return_label)
571#define naked_return_label (cfun->x_naked_return_label)
572#define save_expr_regs (cfun->x_save_expr_regs)
573#define stack_slot_list (cfun->x_stack_slot_list)
574#define parm_birth_insn (cfun->x_parm_birth_insn)
575#define frame_offset (cfun->x_frame_offset)
576#define tail_recursion_label (cfun->x_tail_recursion_label)
577#define tail_recursion_reentry (cfun->x_tail_recursion_reentry)
578#define arg_pointer_save_area (cfun->x_arg_pointer_save_area)
579#define rtl_expr_chain (cfun->x_rtl_expr_chain)
580#define last_parm_insn (cfun->x_last_parm_insn)
581#define context_display (cfun->x_context_display)
582#define trampoline_list (cfun->x_trampoline_list)
583#define function_call_count (cfun->x_function_call_count)
584#define temp_slots (cfun->x_temp_slots)
585#define temp_slot_level (cfun->x_temp_slot_level)
586#define target_temp_slot_level (cfun->x_target_temp_slot_level)
587#define var_temp_slot_level (cfun->x_var_temp_slot_level)
588#define nonlocal_labels (cfun->x_nonlocal_labels)
589#define nonlocal_goto_handler_slots (cfun->x_nonlocal_goto_handler_slots)
590#define nonlocal_goto_handler_labels (cfun->x_nonlocal_goto_handler_labels)
591#define nonlocal_goto_stack_level (cfun->x_nonlocal_goto_stack_level)
592
593/* The FUNCTION_DECL for an inline function currently being expanded. */
594extern tree inline_function_decl;
595
596/* Given a function decl for a containing function,
597 return the `struct function' for it. */
598struct function *find_function_data (tree);
599
600/* Set NOTE_BLOCK for each block note in the current function. */
601extern void identify_blocks (void);
602
603/* Identify BLOCKs referenced by more than one NOTE_INSN_BLOCK_{BEG,END},
604 and create duplicate blocks. */
605extern void reorder_blocks (void);
606
607/* Set BLOCK_NUMBER for all the blocks in FN. */
608extern void number_blocks (tree);
609
610/* Return size needed for stack frame based on slots so far allocated.
611 This size counts from zero. It is not rounded to STACK_BOUNDARY;
612 the caller may have to do that. */
613extern HOST_WIDE_INT get_frame_size (void);
614/* Likewise, but for a different than the current function. */
615extern HOST_WIDE_INT get_func_frame_size (struct function *);
616
617/* A pointer to a function to create target specific, per-function
618 data structures. */
619extern struct machine_function * (*init_machine_status) (void);
620
621/* Save and restore status information for a nested function. */
622extern void restore_emit_status (struct function *);
623extern void free_after_parsing (struct function *);
624extern void free_after_compilation (struct function *);
625
626extern void init_varasm_status (struct function *);
627
628#ifdef RTX_CODE
629extern void diddle_return_value (void (*)(rtx, void*), void*);
630extern void clobber_return_register (void);
631extern void use_return_register (void);
632#endif
633
634extern rtx get_arg_pointer_save_area (struct function *);
635
636extern void init_virtual_regs (struct emit_status *);
637
638/* Returns the name of the current function. */
639extern const char *current_function_name (void);
640
641/* Called once, at initialization, to initialize function.c. */
642extern void init_function_once (void);
643
644extern void do_warn_unused_parameter (tree);
645
646#endif /* GCC_FUNCTION_H */