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Commit | Line | Data |
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bf6beae5 | 1 | /* Structure for saving state for a nested function. |
af841dbd | 2 | Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
6fb5fa3c | 3 | 1999, 2000, 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc. |
bf6beae5 | 4 | |
1322177d | 5 | This file is part of GCC. |
bf6beae5 | 6 | |
1322177d LB |
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 | |
9dcd6f09 | 9 | Software Foundation; either version 3, or (at your option) any later |
1322177d | 10 | version. |
bf6beae5 | 11 | |
1322177d LB |
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. | |
bf6beae5 CH |
16 | |
17 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
bf6beae5 | 20 | |
264fa2db ZL |
21 | #ifndef GCC_FUNCTION_H |
22 | #define GCC_FUNCTION_H | |
90f90283 | 23 | #include "tree.h" |
33c9159e | 24 | #include "hashtab.h" |
90f90283 | 25 | |
e2500fed | 26 | struct var_refs_queue GTY(()) |
a00b8dfa RK |
27 | { |
28 | rtx modified; | |
29 | enum machine_mode promoted_mode; | |
30 | int unsignedp; | |
31 | struct var_refs_queue *next; | |
32 | }; | |
bf6beae5 CH |
33 | |
34 | /* Stack of pending (incomplete) sequences saved by `start_sequence'. | |
35 | Each element describes one pending sequence. | |
36 | The main insn-chain is saved in the last element of the chain, | |
37 | unless the chain is empty. */ | |
38 | ||
e2500fed | 39 | struct sequence_stack GTY(()) |
bf6beae5 CH |
40 | { |
41 | /* First and last insns in the chain of the saved sequence. */ | |
e2500fed GK |
42 | rtx first; |
43 | rtx last; | |
bf6beae5 CH |
44 | struct sequence_stack *next; |
45 | }; | |
46 | ||
a0dabda5 JM |
47 | /* Stack of single obstacks. */ |
48 | ||
49 | struct simple_obstack_stack | |
50 | { | |
51 | struct obstack *obstack; | |
52 | struct simple_obstack_stack *next; | |
53 | }; | |
bf6beae5 | 54 | \f |
e2500fed | 55 | struct emit_status GTY(()) |
49ad7cfa BS |
56 | { |
57 | /* This is reset to LAST_VIRTUAL_REGISTER + 1 at the start of each function. | |
58 | After rtl generation, it is 1 plus the largest register number used. */ | |
59 | int x_reg_rtx_no; | |
60 | ||
61 | /* Lowest label number in current function. */ | |
62 | int x_first_label_num; | |
63 | ||
64 | /* The ends of the doubly-linked chain of rtl for the current function. | |
65 | Both are reset to null at the start of rtl generation for the function. | |
fa8db1f7 | 66 | |
4dfa0342 RH |
67 | start_sequence saves both of these on `sequence_stack' and then starts |
68 | a new, nested sequence of insns. */ | |
49ad7cfa BS |
69 | rtx x_first_insn; |
70 | rtx x_last_insn; | |
71 | ||
49ad7cfa BS |
72 | /* Stack of pending (incomplete) sequences saved by `start_sequence'. |
73 | Each element describes one pending sequence. | |
74 | The main insn-chain is saved in the last element of the chain, | |
75 | unless the chain is empty. */ | |
76 | struct sequence_stack *sequence_stack; | |
77 | ||
78 | /* INSN_UID for next insn emitted. | |
79 | Reset to 1 for each function compiled. */ | |
80 | int x_cur_insn_uid; | |
81 | ||
fd3acbb3 | 82 | /* Location the last line-number NOTE emitted. |
49ad7cfa | 83 | This is used to avoid generating duplicates. */ |
fd3acbb3 | 84 | location_t x_last_location; |
49ad7cfa | 85 | |
0d4903b8 RK |
86 | /* The length of the regno_pointer_align, regno_decl, and x_regno_reg_rtx |
87 | vectors. Since these vectors are needed during the expansion phase when | |
88 | the total number of registers in the function is not yet known, the | |
89 | vectors are copied and made bigger when necessary. */ | |
3502dc9c | 90 | int regno_pointer_align_length; |
49ad7cfa BS |
91 | |
92 | /* Indexed by pseudo register number, if nonzero gives the known alignment | |
3502dc9c JDA |
93 | for that pseudo (if REG_POINTER is set in x_regno_reg_rtx). |
94 | Allocated in parallel with x_regno_reg_rtx. */ | |
ddb0ae00 | 95 | unsigned char * GTY ((length ("%h.x_reg_rtx_no"))) |
e2500fed | 96 | regno_pointer_align; |
49ad7cfa BS |
97 | |
98 | /* Indexed by pseudo register number, gives the rtx for that pseudo. | |
8fff4fc1 | 99 | Allocated in parallel with regno_pointer_align. */ |
ddb0ae00 | 100 | rtx * GTY ((length ("%h.x_reg_rtx_no"))) x_regno_reg_rtx; |
49ad7cfa BS |
101 | }; |
102 | ||
103 | /* For backward compatibility... eventually these should all go away. */ | |
01d939e8 | 104 | #define reg_rtx_no (cfun->emit->x_reg_rtx_no) |
01d939e8 BS |
105 | #define regno_reg_rtx (cfun->emit->x_regno_reg_rtx) |
106 | #define seq_stack (cfun->emit->sequence_stack) | |
49ad7cfa | 107 | |
01d939e8 | 108 | #define REGNO_POINTER_ALIGN(REGNO) (cfun->emit->regno_pointer_align[REGNO]) |
49ad7cfa | 109 | |
e2500fed | 110 | struct expr_status GTY(()) |
49ad7cfa BS |
111 | { |
112 | /* Number of units that we should eventually pop off the stack. | |
113 | These are the arguments to function calls that have already returned. */ | |
114 | int x_pending_stack_adjust; | |
115 | ||
116 | /* Under some ABIs, it is the caller's responsibility to pop arguments | |
117 | pushed for function calls. A naive implementation would simply pop | |
118 | the arguments immediately after each call. However, if several | |
119 | function calls are made in a row, it is typically cheaper to pop | |
120 | all the arguments after all of the calls are complete since a | |
121 | single pop instruction can be used. Therefore, GCC attempts to | |
122 | defer popping the arguments until absolutely necessary. (For | |
123 | example, at the end of a conditional, the arguments must be popped, | |
124 | since code outside the conditional won't know whether or not the | |
125 | arguments need to be popped.) | |
126 | ||
cc2902df | 127 | When INHIBIT_DEFER_POP is nonzero, however, the compiler does not |
49ad7cfa BS |
128 | attempt to defer pops. Instead, the stack is popped immediately |
129 | after each call. Rather then setting this variable directly, use | |
130 | NO_DEFER_POP and OK_DEFER_POP. */ | |
131 | int x_inhibit_defer_pop; | |
132 | ||
1503a7ec | 133 | /* If PREFERRED_STACK_BOUNDARY and PUSH_ROUNDING are defined, the stack |
98ef4163 | 134 | boundary can be momentarily unaligned while pushing the arguments. |
1503a7ec JH |
135 | Record the delta since last aligned boundary here in order to get |
136 | stack alignment in the nested function calls working right. */ | |
137 | int x_stack_pointer_delta; | |
138 | ||
49ad7cfa BS |
139 | /* Nonzero means __builtin_saveregs has already been done in this function. |
140 | The value is the pseudoreg containing the value __builtin_saveregs | |
141 | returned. */ | |
142 | rtx x_saveregs_value; | |
143 | ||
144 | /* Similarly for __builtin_apply_args. */ | |
145 | rtx x_apply_args_value; | |
146 | ||
147 | /* List of labels that must never be deleted. */ | |
148 | rtx x_forced_labels; | |
49ad7cfa BS |
149 | }; |
150 | ||
01d939e8 BS |
151 | #define pending_stack_adjust (cfun->expr->x_pending_stack_adjust) |
152 | #define inhibit_defer_pop (cfun->expr->x_inhibit_defer_pop) | |
153 | #define saveregs_value (cfun->expr->x_saveregs_value) | |
154 | #define apply_args_value (cfun->expr->x_apply_args_value) | |
155 | #define forced_labels (cfun->expr->x_forced_labels) | |
1503a7ec | 156 | #define stack_pointer_delta (cfun->expr->x_stack_pointer_delta) |
49ad7cfa | 157 | |
5cd4ec7f | 158 | struct gimple_df; |
6370682a KH |
159 | struct temp_slot; |
160 | typedef struct temp_slot *temp_slot_p; | |
161 | ||
162 | DEF_VEC_P(temp_slot_p); | |
163 | DEF_VEC_ALLOC_P(temp_slot_p,gc); | |
164 | ||
55dea919 RG |
165 | enum function_frequency { |
166 | /* This function most likely won't be executed at all. | |
52bf96d2 | 167 | (set only when profile feedback is available or via function attribute). */ |
55dea919 RG |
168 | FUNCTION_FREQUENCY_UNLIKELY_EXECUTED, |
169 | /* The default value. */ | |
170 | FUNCTION_FREQUENCY_NORMAL, | |
171 | /* Optimize this function hard | |
52bf96d2 | 172 | (set only when profile feedback is available or via function attribute). */ |
55dea919 RG |
173 | FUNCTION_FREQUENCY_HOT |
174 | }; | |
175 | ||
bf6beae5 CH |
176 | /* This structure can save all the important global and static variables |
177 | describing the status of the current function. */ | |
178 | ||
e2500fed | 179 | struct function GTY(()) |
bf6beae5 | 180 | { |
b384405b | 181 | struct eh_status *eh; |
49ad7cfa BS |
182 | struct expr_status *expr; |
183 | struct emit_status *emit; | |
36edd3cc | 184 | struct varasm_status *varasm; |
b384405b | 185 | |
997de8ed SB |
186 | /* The control flow graph for this function. */ |
187 | struct control_flow_graph *cfg; | |
5cd4ec7f JH |
188 | /* SSA and dataflow information. */ |
189 | struct gimple_df *gimple_df; | |
997de8ed | 190 | |
598ec7bd | 191 | /* The loops in this function. */ |
9e2f83a5 | 192 | struct loops *x_current_loops; |
598ec7bd | 193 | |
6946b3f7 JH |
194 | /* Value histograms attached to particular statements. */ |
195 | htab_t GTY((skip)) value_histograms; | |
196 | ||
bf6beae5 | 197 | /* For function.c. */ |
49ad7cfa | 198 | |
19eb1ad7 | 199 | /* Points to the FUNCTION_DECL of this function. */ |
bf6beae5 | 200 | tree decl; |
49ad7cfa | 201 | |
eb3ae3e1 ZW |
202 | /* Function containing this function, if any. */ |
203 | struct function *outer; | |
204 | ||
49ad7cfa BS |
205 | /* Number of bytes of args popped by function being compiled on its return. |
206 | Zero if no bytes are to be popped. | |
207 | May affect compilation of return insn or of function epilogue. */ | |
bf6beae5 | 208 | int pops_args; |
49ad7cfa | 209 | |
49ad7cfa BS |
210 | /* If function's args have a fixed size, this is that size, in bytes. |
211 | Otherwise, it is -1. | |
212 | May affect compilation of return insn or of function epilogue. */ | |
bf6beae5 | 213 | int args_size; |
49ad7cfa BS |
214 | |
215 | /* # bytes the prologue should push and pretend that the caller pushed them. | |
216 | The prologue must do this, but only if parms can be passed in | |
217 | registers. */ | |
bf6beae5 | 218 | int pretend_args_size; |
49ad7cfa BS |
219 | |
220 | /* # of bytes of outgoing arguments. If ACCUMULATE_OUTGOING_ARGS is | |
221 | defined, the needed space is pushed by the prologue. */ | |
222 | int outgoing_args_size; | |
223 | ||
224 | /* This is the offset from the arg pointer to the place where the first | |
225 | anonymous arg can be found, if there is one. */ | |
bf6beae5 | 226 | rtx arg_offset_rtx; |
49ad7cfa | 227 | |
49ad7cfa BS |
228 | /* Quantities of various kinds of registers |
229 | used for the current function's args. */ | |
230 | CUMULATIVE_ARGS args_info; | |
231 | ||
cc2902df | 232 | /* If nonzero, an RTL expression for the location at which the current |
49ad7cfa BS |
233 | function returns its result. If the current function returns its |
234 | result in a register, current_function_return_rtx will always be | |
235 | the hard register containing the result. */ | |
bf6beae5 | 236 | rtx return_rtx; |
49ad7cfa BS |
237 | |
238 | /* The arg pointer hard register, or the pseudo into which it was copied. */ | |
bf6beae5 | 239 | rtx internal_arg_pointer; |
49ad7cfa | 240 | |
c0e7830f | 241 | /* Opaque pointer used by get_hard_reg_initial_val and |
19eb1ad7 | 242 | has_hard_reg_initial_val (see integrate.[hc]). */ |
c0e7830f DD |
243 | struct initial_value_struct *hard_reg_initial_vals; |
244 | ||
49ad7cfa BS |
245 | /* List (chain of EXPR_LIST) of labels heading the current handlers for |
246 | nonlocal gotos. */ | |
247 | rtx x_nonlocal_goto_handler_labels; | |
248 | ||
49ad7cfa BS |
249 | /* Label that will go on function epilogue. |
250 | Jumping to this label serves as a "return" instruction | |
251 | on machines which require execution of the epilogue on all returns. */ | |
252 | rtx x_return_label; | |
253 | ||
6e3077c6 EB |
254 | /* Label that will go on the end of function epilogue. |
255 | Jumping to this label serves as a "naked return" instruction | |
256 | on machines which require execution of the epilogue on all returns. */ | |
257 | rtx x_naked_return_label; | |
258 | ||
49ad7cfa BS |
259 | /* List (chain of EXPR_LISTs) of all stack slots in this function. |
260 | Made for the sake of unshare_all_rtl. */ | |
261 | rtx x_stack_slot_list; | |
262 | ||
49ad7cfa | 263 | /* Place after which to insert the tail_recursion_label if we need one. */ |
ede497cf | 264 | rtx x_stack_check_probe_note; |
49ad7cfa BS |
265 | |
266 | /* Location at which to save the argument pointer if it will need to be | |
267 | referenced. There are two cases where this is done: if nonlocal gotos | |
268 | exist, or if vars stored at an offset from the argument pointer will be | |
269 | needed by inner routines. */ | |
270 | rtx x_arg_pointer_save_area; | |
271 | ||
272 | /* Offset to end of allocated area of stack frame. | |
273 | If stack grows down, this is the address of the last stack slot allocated. | |
274 | If stack grows up, this is the address for the next slot. */ | |
275 | HOST_WIDE_INT x_frame_offset; | |
276 | ||
1a837f77 | 277 | /* A PARM_DECL that should contain the static chain for this function. |
6de9cd9a DN |
278 | It will be initialized at the beginning of the function. */ |
279 | tree static_chain_decl; | |
49ad7cfa | 280 | |
6de9cd9a DN |
281 | /* An expression that contains the non-local goto save area. The first |
282 | word is the saved frame pointer and the second is the saved stack | |
283 | pointer. */ | |
284 | tree nonlocal_goto_save_area; | |
49ad7cfa BS |
285 | |
286 | /* Insn after which register parms and SAVE_EXPRs are born, if nonopt. */ | |
287 | rtx x_parm_birth_insn; | |
288 | ||
0aea6467 | 289 | /* List of all used temporaries allocated, by level. */ |
6370682a | 290 | VEC(temp_slot_p,gc) *x_used_temp_slots; |
0aea6467 ZD |
291 | |
292 | /* List of available temp slots. */ | |
293 | struct temp_slot *x_avail_temp_slots; | |
49ad7cfa | 294 | |
49ad7cfa BS |
295 | /* This slot is initialized as 0 and is added to |
296 | during the nested function. */ | |
297 | struct var_refs_queue *fixup_var_refs_queue; | |
bf6beae5 | 298 | |
55dea919 RG |
299 | /* Current nesting level for temporaries. */ |
300 | int x_temp_slot_level; | |
a310245f | 301 | |
49ad7cfa BS |
302 | /* Highest label number in current function. */ |
303 | int inl_max_label_num; | |
304 | ||
df696a75 RH |
305 | /* Function sequence number for profiling, debugging, etc. */ |
306 | int funcdef_no; | |
f6f315fe | 307 | |
bf6beae5 | 308 | /* For md files. */ |
49ad7cfa | 309 | |
d6e1b011 | 310 | /* tm.h can use this to store whatever it likes. */ |
1431042e | 311 | struct machine_function * GTY ((maybe_undef)) machine; |
55dea919 | 312 | |
a0871656 | 313 | /* The largest alignment of slot allocated on the stack. */ |
95899b34 | 314 | unsigned int stack_alignment_needed; |
55dea919 | 315 | |
c2f8b491 | 316 | /* Preferred alignment of the end of stack frame. */ |
95899b34 | 317 | unsigned int preferred_stack_boundary; |
bd231550 | 318 | |
8c5666b4 | 319 | /* Language-specific code can use this to store whatever it likes. */ |
e2500fed | 320 | struct language_function * language; |
8c5666b4 | 321 | |
33c9159e AH |
322 | /* Used types hash table. */ |
323 | htab_t GTY ((param_is (union tree_node))) used_types_hash; | |
324 | ||
bd231550 | 325 | /* For reorg. */ |
49ad7cfa BS |
326 | |
327 | /* If some insns can be deferred to the delay slots of the epilogue, the | |
328 | delay list for them is recorded here. */ | |
bd231550 | 329 | rtx epilogue_delay_list; |
89996b6e | 330 | |
23b6da10 RH |
331 | /* Maximal number of entities in the single jumptable. Used to estimate |
332 | final flowgraph size. */ | |
333 | int max_jumptable_ents; | |
334 | ||
6de9cd9a DN |
335 | /* UIDs for LABEL_DECLs. */ |
336 | int last_label_uid; | |
337 | ||
338 | /* Line number of the end of the function. */ | |
339 | location_t function_end_locus; | |
340 | ||
6de9cd9a DN |
341 | /* The variables unexpanded so far. */ |
342 | tree unexpanded_var_list; | |
343 | ||
c7466dee CT |
344 | /* Assembly labels for the hot and cold text sections, to |
345 | be used by debugger functions for determining the size of text | |
346 | sections. */ | |
347 | ||
1ad435a5 CT |
348 | const char *hot_section_label; |
349 | const char *cold_section_label; | |
350 | const char *hot_section_end_label; | |
351 | const char *cold_section_end_label; | |
c7466dee CT |
352 | |
353 | /* String to be used for name of cold text sections, via | |
354 | targetm.asm_out.named_section. */ | |
355 | ||
356 | const char *unlikely_text_section_name; | |
357 | ||
7d69de61 RH |
358 | /* A variable living at the top of the frame that holds a known value. |
359 | Used for detecting stack clobbers. */ | |
360 | tree stack_protect_guard; | |
361 | ||
a5093353 JH |
362 | /* Properties used by the pass manager. */ |
363 | unsigned int curr_properties; | |
364 | unsigned int last_verified; | |
365 | ||
89996b6e RH |
366 | /* Collected bit flags. */ |
367 | ||
ecaebb9e NS |
368 | /* Number of units of general registers that need saving in stdarg |
369 | function. What unit is depends on the backend, either it is number | |
370 | of bytes, or it can be number of registers. */ | |
371 | unsigned int va_list_gpr_size : 8; | |
372 | ||
373 | /* Number of units of floating point registers that need saving in stdarg | |
374 | function. */ | |
375 | unsigned int va_list_fpr_size : 8; | |
376 | ||
377 | /* How commonly executed the function is. Initialized during branch | |
378 | probabilities pass. */ | |
379 | ENUM_BITFIELD (function_frequency) function_frequency : 2; | |
380 | ||
89996b6e RH |
381 | /* Nonzero if function being compiled needs to be given an address |
382 | where the value should be stored. */ | |
383 | unsigned int returns_struct : 1; | |
384 | ||
385 | /* Nonzero if function being compiled needs to | |
386 | return the address of where it has put a structure value. */ | |
387 | unsigned int returns_pcc_struct : 1; | |
fa8db1f7 | 388 | |
89996b6e RH |
389 | /* Nonzero if the current function returns a pointer type. */ |
390 | unsigned int returns_pointer : 1; | |
391 | ||
89996b6e RH |
392 | /* Nonzero if function being compiled can call setjmp. */ |
393 | unsigned int calls_setjmp : 1; | |
394 | ||
89996b6e RH |
395 | /* Nonzero if function being compiled can call alloca, |
396 | either as a subroutine or builtin. */ | |
397 | unsigned int calls_alloca : 1; | |
398 | ||
c8f27794 | 399 | /* Nonzero if function being compiled called builtin_return_addr or |
c0220ea4 | 400 | builtin_frame_address with nonzero count. */ |
c8f27794 JW |
401 | unsigned int accesses_prior_frames : 1; |
402 | ||
52a11cbf RH |
403 | /* Nonzero if the function calls __builtin_eh_return. */ |
404 | unsigned int calls_eh_return : 1; | |
405 | ||
89996b6e RH |
406 | /* Nonzero if function being compiled receives nonlocal gotos |
407 | from nested functions. */ | |
408 | unsigned int has_nonlocal_label : 1; | |
409 | ||
ecaebb9e NS |
410 | /* Nonzero if function calls builtin_unwind_init. */ |
411 | unsigned int calls_unwind_init : 1; | |
412 | ||
89996b6e RH |
413 | /* Nonzero if function being compiled has nonlocal gotos to parent |
414 | function. */ | |
415 | unsigned int has_nonlocal_goto : 1; | |
d8d72314 PB |
416 | |
417 | /* Nonzero if function being compiled has an asm statement. */ | |
418 | unsigned int has_asm_statement : 1; | |
89996b6e | 419 | |
dd292d0a MM |
420 | /* Nonzero if the current function is a thunk, i.e., a lightweight |
421 | function implemented by the output_mi_thunk hook) that just | |
422 | adjusts one of its arguments and forwards to another | |
423 | function. */ | |
89996b6e RH |
424 | unsigned int is_thunk : 1; |
425 | ||
b6128b8c SH |
426 | /* This bit is used by the exception handling logic. It is set if all |
427 | calls (if any) are sibling calls. Such functions do not have to | |
428 | have EH tables generated, as they cannot throw. A call to such a | |
429 | function, however, should be treated as throwing if any of its callees | |
4b7e68e7 | 430 | can throw. */ |
b6128b8c | 431 | unsigned int all_throwers_are_sibcalls : 1; |
fa8db1f7 | 432 | |
70f4f91c WC |
433 | /* Nonzero if profiling code should be generated. */ |
434 | unsigned int profile : 1; | |
435 | ||
89996b6e RH |
436 | /* Nonzero if stack limit checking should be enabled in the current |
437 | function. */ | |
438 | unsigned int limit_stack : 1; | |
439 | ||
6c535c69 | 440 | /* Nonzero if current function uses stdarg.h or equivalent. */ |
89996b6e RH |
441 | unsigned int stdarg : 1; |
442 | ||
89996b6e RH |
443 | /* Nonzero if the back-end should not keep track of expressions that |
444 | determine the size of variable-sized objects. Normally, such | |
445 | expressions are saved away, and then expanded when the next | |
446 | function is started. For example, if a parameter has a | |
447 | variable-sized type, then the size of the parameter is computed | |
448 | when the function body is entered. However, some front-ends do | |
449 | not desire this behavior. */ | |
450 | unsigned int x_dont_save_pending_sizes_p : 1; | |
451 | ||
452 | /* Nonzero if the current function uses the constant pool. */ | |
453 | unsigned int uses_const_pool : 1; | |
454 | ||
455 | /* Nonzero if the current function uses pic_offset_table_rtx. */ | |
456 | unsigned int uses_pic_offset_table : 1; | |
457 | ||
458 | /* Nonzero if the current function needs an lsda for exception handling. */ | |
459 | unsigned int uses_eh_lsda : 1; | |
964be02f | 460 | |
e0bb17a8 | 461 | /* Nonzero if code to initialize arg_pointer_save_area has been emitted. */ |
964be02f | 462 | unsigned int arg_pointer_save_area_init : 1; |
9d30f3c1 | 463 | |
55dea919 RG |
464 | unsigned int after_inlining : 1; |
465 | ||
466 | /* Set when the call to function itself has been emit. */ | |
467 | unsigned int recursive_call_emit : 1; | |
468 | ||
469 | /* Set when the tail call has been produced. */ | |
470 | unsigned int tail_call_emit : 1; | |
471 | ||
07beea0d AH |
472 | /* FIXME tuples: This bit is temporarily here to mark when a |
473 | function has been gimplified, so we can make sure we're not | |
474 | creating non GIMPLE tuples after gimplification. */ | |
475 | unsigned gimplified : 1; | |
bf6beae5 CH |
476 | }; |
477 | ||
9d30f3c1 JJ |
478 | /* If va_list_[gf]pr_size is set to this, it means we don't know how |
479 | many units need to be saved. */ | |
480 | #define VA_LIST_MAX_GPR_SIZE 255 | |
481 | #define VA_LIST_MAX_FPR_SIZE 255 | |
482 | ||
01d939e8 | 483 | /* The function currently being compiled. */ |
e2500fed | 484 | extern GTY(()) struct function *cfun; |
01d939e8 | 485 | |
1be4cd1f WH |
486 | /* Pointer to chain of `struct function' for containing functions. */ |
487 | extern GTY(()) struct function *outer_function_chain; | |
488 | ||
c39ada04 DD |
489 | /* Nonzero if we've already converted virtual regs to hard regs. */ |
490 | extern int virtuals_instantiated; | |
491 | ||
3edc56a9 JJ |
492 | /* Nonzero if at least one trampoline has been created. */ |
493 | extern int trampolines_created; | |
494 | ||
49ad7cfa | 495 | /* For backward compatibility... eventually these should all go away. */ |
01d939e8 BS |
496 | #define current_function_pops_args (cfun->pops_args) |
497 | #define current_function_returns_struct (cfun->returns_struct) | |
498 | #define current_function_returns_pcc_struct (cfun->returns_pcc_struct) | |
499 | #define current_function_returns_pointer (cfun->returns_pointer) | |
01d939e8 BS |
500 | #define current_function_calls_setjmp (cfun->calls_setjmp) |
501 | #define current_function_calls_alloca (cfun->calls_alloca) | |
c8f27794 | 502 | #define current_function_accesses_prior_frames (cfun->accesses_prior_frames) |
52a11cbf | 503 | #define current_function_calls_eh_return (cfun->calls_eh_return) |
01d939e8 BS |
504 | #define current_function_is_thunk (cfun->is_thunk) |
505 | #define current_function_args_info (cfun->args_info) | |
506 | #define current_function_args_size (cfun->args_size) | |
507 | #define current_function_pretend_args_size (cfun->pretend_args_size) | |
508 | #define current_function_outgoing_args_size (cfun->outgoing_args_size) | |
509 | #define current_function_arg_offset_rtx (cfun->arg_offset_rtx) | |
01d939e8 BS |
510 | #define current_function_stdarg (cfun->stdarg) |
511 | #define current_function_internal_arg_pointer (cfun->internal_arg_pointer) | |
512 | #define current_function_return_rtx (cfun->return_rtx) | |
70f4f91c | 513 | #define current_function_profile (cfun->profile) |
df696a75 | 514 | #define current_function_funcdef_no (cfun->funcdef_no) |
01d939e8 BS |
515 | #define current_function_limit_stack (cfun->limit_stack) |
516 | #define current_function_uses_pic_offset_table (cfun->uses_pic_offset_table) | |
517 | #define current_function_uses_const_pool (cfun->uses_const_pool) | |
01d939e8 BS |
518 | #define current_function_epilogue_delay_list (cfun->epilogue_delay_list) |
519 | #define current_function_has_nonlocal_label (cfun->has_nonlocal_label) | |
ecaebb9e | 520 | #define current_function_calls_unwind_init (cfun->calls_unwind_init) |
01d939e8 | 521 | #define current_function_has_nonlocal_goto (cfun->has_nonlocal_goto) |
d8d72314 | 522 | #define current_function_has_asm_statement (cfun->has_asm_statement) |
01d939e8 | 523 | |
01d939e8 | 524 | #define return_label (cfun->x_return_label) |
6e3077c6 | 525 | #define naked_return_label (cfun->x_naked_return_label) |
01d939e8 BS |
526 | #define stack_slot_list (cfun->x_stack_slot_list) |
527 | #define parm_birth_insn (cfun->x_parm_birth_insn) | |
528 | #define frame_offset (cfun->x_frame_offset) | |
ede497cf | 529 | #define stack_check_probe_note (cfun->x_stack_check_probe_note) |
01d939e8 | 530 | #define arg_pointer_save_area (cfun->x_arg_pointer_save_area) |
0aea6467 ZD |
531 | #define used_temp_slots (cfun->x_used_temp_slots) |
532 | #define avail_temp_slots (cfun->x_avail_temp_slots) | |
01d939e8 | 533 | #define temp_slot_level (cfun->x_temp_slot_level) |
01d939e8 | 534 | #define nonlocal_goto_handler_labels (cfun->x_nonlocal_goto_handler_labels) |
6fb5fa3c | 535 | #define rtl_df (cfun->df) |
598ec7bd | 536 | #define current_loops (cfun->x_current_loops) |
6946b3f7 | 537 | #define VALUE_HISTOGRAMS(fun) (fun)->value_histograms |
bf6beae5 | 538 | |
ba534a45 JW |
539 | /* Given a function decl for a containing function, |
540 | return the `struct function' for it. */ | |
fa8db1f7 | 541 | struct function *find_function_data (tree); |
ba534a45 | 542 | |
116eebd6 MM |
543 | /* Identify BLOCKs referenced by more than one NOTE_INSN_BLOCK_{BEG,END}, |
544 | and create duplicate blocks. */ | |
fa8db1f7 | 545 | extern void reorder_blocks (void); |
d6e1b011 | 546 | |
18c038b9 | 547 | /* Set BLOCK_NUMBER for all the blocks in FN. */ |
fa8db1f7 | 548 | extern void number_blocks (tree); |
18c038b9 | 549 | |
6de9cd9a DN |
550 | extern void clear_block_marks (tree); |
551 | extern tree blocks_nreverse (tree); | |
6de9cd9a | 552 | |
9a807d3a RK |
553 | /* Return size needed for stack frame based on slots so far allocated. |
554 | This size counts from zero. It is not rounded to STACK_BOUNDARY; | |
555 | the caller may have to do that. */ | |
fa8db1f7 | 556 | extern HOST_WIDE_INT get_frame_size (void); |
9a807d3a | 557 | |
9fb798d7 EB |
558 | /* Issue an error message and return TRUE if frame OFFSET overflows in |
559 | the signed target pointer arithmetics for function FUNC. Otherwise | |
560 | return FALSE. */ | |
561 | extern bool frame_offset_overflow (HOST_WIDE_INT, tree); | |
562 | ||
e2500fed GK |
563 | /* A pointer to a function to create target specific, per-function |
564 | data structures. */ | |
fa8db1f7 | 565 | extern struct machine_function * (*init_machine_status) (void); |
ba534a45 | 566 | |
154bba13 | 567 | /* Save and restore status information for a nested function. */ |
fa8db1f7 AJ |
568 | extern void free_after_parsing (struct function *); |
569 | extern void free_after_compilation (struct function *); | |
a00b8dfa | 570 | |
fa8db1f7 | 571 | extern void init_varasm_status (struct function *); |
fa51b01b | 572 | |
bd695e1e | 573 | #ifdef RTX_CODE |
fa8db1f7 AJ |
574 | extern void diddle_return_value (void (*)(rtx, void*), void*); |
575 | extern void clobber_return_register (void); | |
bd695e1e RH |
576 | #endif |
577 | ||
fa8db1f7 | 578 | extern rtx get_arg_pointer_save_area (struct function *); |
278ed218 | 579 | |
faed5cc3 SB |
580 | /* Returns the name of the current function. */ |
581 | extern const char *current_function_name (void); | |
6fb5fa3c DB |
582 | /* Returns the assembler name (raw, mangled) of the current function. */ |
583 | extern const char *current_function_assembler_name (void); | |
faed5cc3 | 584 | |
902edd36 JH |
585 | extern void do_warn_unused_parameter (tree); |
586 | ||
0976078c RH |
587 | extern bool pass_by_reference (CUMULATIVE_ARGS *, enum machine_mode, |
588 | tree, bool); | |
6cdd5672 RH |
589 | extern bool reference_callee_copied (CUMULATIVE_ARGS *, enum machine_mode, |
590 | tree, bool); | |
0976078c | 591 | |
8d8d1a28 | 592 | extern void used_types_insert (tree); |
33c9159e | 593 | |
3e87758a | 594 | extern int get_next_funcdef_no (void); |
264fa2db | 595 | #endif /* GCC_FUNCTION_H */ |