Line data Source code
1 : /* IRA hard register and memory cost calculation for allocnos or pseudos.
2 : Copyright (C) 2006-2026 Free Software Foundation, Inc.
3 : Contributed by Vladimir Makarov <vmakarov@redhat.com>.
4 :
5 : This file is part of GCC.
6 :
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.
11 :
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.
16 :
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/>. */
20 :
21 : #include "config.h"
22 : #include "system.h"
23 : #include "coretypes.h"
24 : #include "backend.h"
25 : #include "target.h"
26 : #include "rtl.h"
27 : #include "tree.h"
28 : #include "predict.h"
29 : #include "memmodel.h"
30 : #include "tm_p.h"
31 : #include "insn-config.h"
32 : #include "regs.h"
33 : #include "regset.h"
34 : #include "ira.h"
35 : #include "ira-int.h"
36 : #include "addresses.h"
37 : #include "reload.h"
38 : #include "print-rtl.h"
39 :
40 : /* The flags is set up every time when we calculate pseudo register
41 : classes through function ira_set_pseudo_classes. */
42 : static bool pseudo_classes_defined_p = false;
43 :
44 : /* TRUE if we work with allocnos. Otherwise we work with pseudos. */
45 : static bool allocno_p;
46 :
47 : /* Number of elements in array `costs'. */
48 : static int cost_elements_num;
49 :
50 : /* The `costs' struct records the cost of using hard registers of each
51 : class considered for the calculation and of using memory for each
52 : allocno or pseudo. */
53 : struct costs
54 : {
55 : int mem_cost;
56 : /* Costs for register classes start here. We process only some
57 : allocno classes. */
58 : int cost[1];
59 : };
60 :
61 : #define max_struct_costs_size \
62 : (this_target_ira_int->x_max_struct_costs_size)
63 : #define init_cost \
64 : (this_target_ira_int->x_init_cost)
65 : #define temp_costs \
66 : (this_target_ira_int->x_temp_costs)
67 : #define op_costs \
68 : (this_target_ira_int->x_op_costs)
69 : #define this_op_costs \
70 : (this_target_ira_int->x_this_op_costs)
71 :
72 : /* Costs of each class for each allocno or pseudo. */
73 : static struct costs *costs;
74 :
75 : /* Accumulated costs of each class for each allocno. */
76 : static struct costs *total_allocno_costs;
77 :
78 : /* It is the current size of struct costs. */
79 : static size_t struct_costs_size;
80 :
81 : /* Return pointer to structure containing costs of allocno or pseudo
82 : with given NUM in array ARR. */
83 : #define COSTS(arr, num) \
84 : ((struct costs *) ((char *) (arr) + (num) * struct_costs_size))
85 :
86 : /* Return index in COSTS when processing reg with REGNO. */
87 : #define COST_INDEX(regno) (allocno_p \
88 : ? ALLOCNO_NUM (ira_curr_regno_allocno_map[regno]) \
89 : : (int) regno)
90 :
91 : /* Record register class preferences of each allocno or pseudo. Null
92 : value means no preferences. It happens on the 1st iteration of the
93 : cost calculation. */
94 : static enum reg_class *pref;
95 :
96 : /* Allocated buffers for pref. */
97 : static enum reg_class *pref_buffer;
98 :
99 : /* Record allocno class of each allocno with the same regno. */
100 : static enum reg_class *regno_aclass;
101 :
102 : /* Record cost gains for not allocating a register with an invariant
103 : equivalence. */
104 : static int *regno_equiv_gains;
105 :
106 : /* Execution frequency of the current insn. */
107 : static int frequency;
108 :
109 :
110 :
111 : /* Info about reg classes whose costs are calculated for a pseudo. */
112 : struct cost_classes
113 : {
114 : /* Number of the cost classes in the subsequent array. */
115 : int num;
116 : /* Container of the cost classes. */
117 : enum reg_class classes[N_REG_CLASSES];
118 : /* Map reg class -> index of the reg class in the previous array.
119 : -1 if it is not a cost class. */
120 : int index[N_REG_CLASSES];
121 : /* Map hard regno index of first class in array CLASSES containing
122 : the hard regno, -1 otherwise. */
123 : int hard_regno_index[FIRST_PSEUDO_REGISTER];
124 : };
125 :
126 : /* Types of pointers to the structure above. */
127 : typedef struct cost_classes *cost_classes_t;
128 : typedef const struct cost_classes *const_cost_classes_t;
129 :
130 : /* Info about cost classes for each pseudo. */
131 : static cost_classes_t *regno_cost_classes;
132 :
133 : /* Helper for cost_classes hashing. */
134 :
135 : struct cost_classes_hasher : pointer_hash <cost_classes>
136 : {
137 : static inline hashval_t hash (const cost_classes *);
138 : static inline bool equal (const cost_classes *, const cost_classes *);
139 : static inline void remove (cost_classes *);
140 : };
141 :
142 : /* Returns hash value for cost classes info HV. */
143 : inline hashval_t
144 110164721 : cost_classes_hasher::hash (const cost_classes *hv)
145 : {
146 110164721 : return iterative_hash (&hv->classes, sizeof (enum reg_class) * hv->num, 0);
147 : }
148 :
149 : /* Compares cost classes info HV1 and HV2. */
150 : inline bool
151 102104526 : cost_classes_hasher::equal (const cost_classes *hv1, const cost_classes *hv2)
152 : {
153 102104526 : return (hv1->num == hv2->num
154 102104526 : && memcmp (hv1->classes, hv2->classes,
155 52635856 : sizeof (enum reg_class) * hv1->num) == 0);
156 : }
157 :
158 : /* Delete cost classes info V from the hash table. */
159 : inline void
160 6071039 : cost_classes_hasher::remove (cost_classes *v)
161 : {
162 6071039 : ira_free (v);
163 6071039 : }
164 :
165 : /* Hash table of unique cost classes. */
166 : static hash_table<cost_classes_hasher> *cost_classes_htab;
167 :
168 : /* Map allocno class -> cost classes for pseudo of given allocno
169 : class. */
170 : static cost_classes_t cost_classes_aclass_cache[N_REG_CLASSES];
171 :
172 : /* Map mode -> cost classes for pseudo of give mode. */
173 : static cost_classes_t cost_classes_mode_cache[MAX_MACHINE_MODE];
174 :
175 : /* Cost classes that include all classes in ira_important_classes. */
176 : static cost_classes all_cost_classes;
177 :
178 : /* Use the array of classes in CLASSES_PTR to fill out the rest of
179 : the structure. */
180 : static void
181 7594866 : complete_cost_classes (cost_classes_t classes_ptr)
182 : {
183 265820310 : for (int i = 0; i < N_REG_CLASSES; i++)
184 258225444 : classes_ptr->index[i] = -1;
185 706322538 : for (int i = 0; i < FIRST_PSEUDO_REGISTER; i++)
186 698727672 : classes_ptr->hard_regno_index[i] = -1;
187 157137728 : for (int i = 0; i < classes_ptr->num; i++)
188 : {
189 149542862 : enum reg_class cl = classes_ptr->classes[i];
190 149542862 : classes_ptr->index[cl] = i;
191 1730677425 : for (int j = ira_class_hard_regs_num[cl] - 1; j >= 0; j--)
192 : {
193 1581134563 : unsigned int hard_regno = ira_class_hard_regs[cl][j];
194 1581134563 : if (classes_ptr->hard_regno_index[hard_regno] < 0)
195 301053236 : classes_ptr->hard_regno_index[hard_regno] = i;
196 : }
197 : }
198 7594866 : }
199 :
200 : /* Initialize info about the cost classes for each pseudo. */
201 : static void
202 1523827 : initiate_regno_cost_classes (void)
203 : {
204 1523827 : int size = sizeof (cost_classes_t) * max_reg_num ();
205 :
206 1523827 : regno_cost_classes = (cost_classes_t *) ira_allocate (size);
207 1523827 : memset (regno_cost_classes, 0, size);
208 1523827 : memset (cost_classes_aclass_cache, 0,
209 : sizeof (cost_classes_t) * N_REG_CLASSES);
210 1523827 : memset (cost_classes_mode_cache, 0,
211 : sizeof (cost_classes_t) * MAX_MACHINE_MODE);
212 1523827 : cost_classes_htab = new hash_table<cost_classes_hasher> (200);
213 1523827 : all_cost_classes.num = ira_important_classes_num;
214 48867449 : for (int i = 0; i < ira_important_classes_num; i++)
215 47343622 : all_cost_classes.classes[i] = ira_important_classes[i];
216 1523827 : complete_cost_classes (&all_cost_classes);
217 1523827 : }
218 :
219 : /* Create new cost classes from cost classes FROM and set up members
220 : index and hard_regno_index. Return the new classes. The function
221 : implements some common code of two functions
222 : setup_regno_cost_classes_by_aclass and
223 : setup_regno_cost_classes_by_mode. */
224 : static cost_classes_t
225 6071039 : setup_cost_classes (cost_classes_t from)
226 : {
227 6071039 : cost_classes_t classes_ptr;
228 :
229 6071039 : classes_ptr = (cost_classes_t) ira_allocate (sizeof (struct cost_classes));
230 6071039 : classes_ptr->num = from->num;
231 108270279 : for (int i = 0; i < from->num; i++)
232 102199240 : classes_ptr->classes[i] = from->classes[i];
233 6071039 : complete_cost_classes (classes_ptr);
234 6071039 : return classes_ptr;
235 : }
236 :
237 : /* Return a version of FULL that only considers registers in REGS that are
238 : valid for mode MODE. Both FULL and the returned class are globally
239 : allocated. */
240 : static cost_classes_t
241 54596841 : restrict_cost_classes (cost_classes_t full, machine_mode mode,
242 : const_hard_reg_set regs)
243 : {
244 54596841 : static struct cost_classes narrow;
245 54596841 : int map[N_REG_CLASSES];
246 54596841 : narrow.num = 0;
247 1589964281 : for (int i = 0; i < full->num; i++)
248 : {
249 : /* Assume that we'll drop the class. */
250 1535367440 : map[i] = -1;
251 :
252 : /* Ignore classes that are too small for the mode. */
253 1535367440 : enum reg_class cl = full->classes[i];
254 1535367440 : if (!contains_reg_of_mode[cl][mode])
255 307374209 : continue;
256 :
257 : /* Calculate the set of registers in CL that belong to REGS and
258 : are valid for MODE. */
259 1246919838 : HARD_REG_SET valid_for_cl = reg_class_contents[cl] & regs;
260 2493839676 : valid_for_cl &= ~(ira_prohibited_class_mode_regs[cl][mode]
261 1246919838 : | ira_no_alloc_regs);
262 2493839676 : if (hard_reg_set_empty_p (valid_for_cl))
263 18926607 : continue;
264 :
265 : /* Don't use this class if the set of valid registers is a subset
266 : of an existing class. For example, suppose we have two classes
267 : GR_REGS and FR_REGS and a union class GR_AND_FR_REGS. Suppose
268 : that the mode changes allowed by FR_REGS are not as general as
269 : the mode changes allowed by GR_REGS.
270 :
271 : In this situation, the mode changes for GR_AND_FR_REGS could
272 : either be seen as the union or the intersection of the mode
273 : changes allowed by the two subclasses. The justification for
274 : the union-based definition would be that, if you want a mode
275 : change that's only allowed by GR_REGS, you can pick a register
276 : from the GR_REGS subclass. The justification for the
277 : intersection-based definition would be that every register
278 : from the class would allow the mode change.
279 :
280 : However, if we have a register that needs to be in GR_REGS,
281 : using GR_AND_FR_REGS with the intersection-based definition
282 : would be too pessimistic, since it would bring in restrictions
283 : that only apply to FR_REGS. Conversely, if we have a register
284 : that needs to be in FR_REGS, using GR_AND_FR_REGS with the
285 : union-based definition would lose the extra restrictions
286 : placed on FR_REGS. GR_AND_FR_REGS is therefore only useful
287 : for cases where GR_REGS and FP_REGS are both valid. */
288 : int pos;
289 12508959157 : for (pos = 0; pos < narrow.num; ++pos)
290 : {
291 11709796921 : enum reg_class cl2 = narrow.classes[pos];
292 23419593842 : if (hard_reg_set_subset_p (valid_for_cl, reg_class_contents[cl2]))
293 : break;
294 : }
295 1227993231 : map[i] = pos;
296 1227993231 : if (pos == narrow.num)
297 : {
298 : /* If several classes are equivalent, prefer to use the one
299 : that was chosen as the allocno class. */
300 799162236 : enum reg_class cl2 = ira_allocno_class_translate[cl];
301 799162236 : if (ira_class_hard_regs_num[cl] == ira_class_hard_regs_num[cl2])
302 799162236 : cl = cl2;
303 799162236 : narrow.classes[narrow.num++] = cl;
304 : }
305 : }
306 54596841 : if (narrow.num == full->num)
307 : return full;
308 :
309 54596005 : cost_classes **slot = cost_classes_htab->find_slot (&narrow, INSERT);
310 54596005 : if (*slot == NULL)
311 : {
312 4136796 : cost_classes_t classes = setup_cost_classes (&narrow);
313 : /* Map equivalent classes to the representative that we chose above. */
314 132825378 : for (int i = 0; i < ira_important_classes_num; i++)
315 : {
316 128688582 : enum reg_class cl = ira_important_classes[i];
317 128688582 : int index = full->index[cl];
318 128688582 : if (index >= 0)
319 114479234 : classes->index[cl] = map[index];
320 : }
321 4136796 : *slot = classes;
322 : }
323 54596005 : return *slot;
324 : }
325 :
326 : /* Setup cost classes for pseudo REGNO whose allocno class is ACLASS.
327 : This function is used when we know an initial approximation of
328 : allocno class of the pseudo already, e.g. on the second iteration
329 : of class cost calculation or after class cost calculation in
330 : register-pressure sensitive insn scheduling or register-pressure
331 : sensitive loop-invariant motion. */
332 : static void
333 49532103 : setup_regno_cost_classes_by_aclass (int regno, enum reg_class aclass)
334 : {
335 49532103 : static struct cost_classes classes;
336 49532103 : cost_classes_t classes_ptr;
337 49532103 : enum reg_class cl;
338 49532103 : int i;
339 49532103 : cost_classes **slot;
340 49532103 : HARD_REG_SET temp, temp2;
341 49532103 : bool exclude_p;
342 :
343 49532103 : if ((classes_ptr = cost_classes_aclass_cache[aclass]) == NULL)
344 : {
345 4103038 : temp = reg_class_contents[aclass] & ~ira_no_alloc_regs;
346 : /* We exclude classes from consideration which are subsets of
347 : ACLASS only if ACLASS is an uniform class. */
348 4103038 : exclude_p = ira_uniform_class_p[aclass];
349 4103038 : classes.num = 0;
350 131697465 : for (i = 0; i < ira_important_classes_num; i++)
351 : {
352 127594427 : cl = ira_important_classes[i];
353 127594427 : if (exclude_p)
354 : {
355 : /* Exclude non-uniform classes which are subsets of
356 : ACLASS. */
357 91037892 : temp2 = reg_class_contents[cl] & ~ira_no_alloc_regs;
358 182075784 : if (hard_reg_set_subset_p (temp2, temp) && cl != aclass)
359 10765906 : continue;
360 : }
361 116828521 : classes.classes[classes.num++] = cl;
362 : }
363 4103038 : slot = cost_classes_htab->find_slot (&classes, INSERT);
364 4103038 : if (*slot == NULL)
365 : {
366 1934243 : classes_ptr = setup_cost_classes (&classes);
367 1934243 : *slot = classes_ptr;
368 : }
369 4103038 : classes_ptr = cost_classes_aclass_cache[aclass] = (cost_classes_t) *slot;
370 : }
371 49532103 : if (regno_reg_rtx[regno] != NULL_RTX)
372 : {
373 : /* Restrict the classes to those that are valid for REGNO's mode
374 : (which might for example exclude singleton classes if the mode
375 : requires two registers). Also restrict the classes to those that
376 : are valid for subregs of REGNO. */
377 48928552 : const HARD_REG_SET *valid_regs = valid_mode_changes_for_regno (regno);
378 48928552 : if (!valid_regs)
379 47491657 : valid_regs = ®_class_contents[ALL_REGS];
380 48928552 : classes_ptr = restrict_cost_classes (classes_ptr,
381 48928552 : PSEUDO_REGNO_MODE (regno),
382 : *valid_regs);
383 : }
384 49532103 : regno_cost_classes[regno] = classes_ptr;
385 49532103 : }
386 :
387 : /* Setup cost classes for pseudo REGNO with MODE. Usage of MODE can
388 : decrease number of cost classes for the pseudo, if hard registers
389 : of some important classes cannot hold a value of MODE. So the
390 : pseudo cannot get hard register of some important classes and cost
391 : calculation for such important classes is only wasting CPU
392 : time. */
393 : static void
394 67682300 : setup_regno_cost_classes_by_mode (int regno, machine_mode mode)
395 : {
396 67682300 : if (const HARD_REG_SET *valid_regs = valid_mode_changes_for_regno (regno))
397 1882644 : regno_cost_classes[regno] = restrict_cost_classes (&all_cost_classes,
398 : mode, *valid_regs);
399 : else
400 : {
401 65799656 : if (cost_classes_mode_cache[mode] == NULL)
402 3785645 : cost_classes_mode_cache[mode]
403 3785645 : = restrict_cost_classes (&all_cost_classes, mode,
404 3785645 : reg_class_contents[ALL_REGS]);
405 65799656 : regno_cost_classes[regno] = cost_classes_mode_cache[mode];
406 : }
407 67682300 : }
408 :
409 : /* Finalize info about the cost classes for each pseudo. */
410 : static void
411 1523827 : finish_regno_cost_classes (void)
412 : {
413 1523827 : ira_free (regno_cost_classes);
414 1523827 : delete cost_classes_htab;
415 1523827 : cost_classes_htab = NULL;
416 1523827 : }
417 :
418 :
419 :
420 : /* Compute the cost of loading X into (if TO_P is TRUE) or from (if
421 : TO_P is FALSE) a register of class RCLASS in mode MODE. X must not
422 : be a pseudo register. */
423 : static int
424 382804162 : copy_cost (rtx x, machine_mode mode, reg_class_t rclass, bool to_p,
425 : secondary_reload_info *prev_sri)
426 : {
427 382804162 : secondary_reload_info sri;
428 382804162 : reg_class_t secondary_class = NO_REGS;
429 :
430 : /* If X is a SCRATCH, there is actually nothing to move since we are
431 : assuming optimal allocation. */
432 382804162 : if (GET_CODE (x) == SCRATCH)
433 : return 0;
434 :
435 : /* Get the class we will actually use for a reload. */
436 382794603 : rclass = targetm.preferred_reload_class (x, rclass);
437 :
438 : /* If we need a secondary reload for an intermediate, the cost is
439 : that to load the input into the intermediate register, then to
440 : copy it. */
441 382794603 : sri.prev_sri = prev_sri;
442 382794603 : sri.extra_cost = 0;
443 : /* PR 68770: Secondary reload might examine the t_icode field. */
444 382794603 : sri.t_icode = CODE_FOR_nothing;
445 :
446 382794603 : secondary_class = targetm.secondary_reload (to_p, x, rclass, mode, &sri);
447 :
448 382794603 : if (secondary_class != NO_REGS)
449 : {
450 174020 : ira_init_register_move_cost_if_necessary (mode);
451 174020 : return (ira_register_move_cost[mode][(int) secondary_class][(int) rclass]
452 174020 : + sri.extra_cost
453 174020 : + copy_cost (x, mode, secondary_class, to_p, &sri));
454 : }
455 :
456 : /* For memory, use the memory move cost, for (hard) registers, use
457 : the cost to move between the register classes, and use 2 for
458 : everything else (constants). */
459 382620583 : if (MEM_P (x) || rclass == NO_REGS)
460 238675643 : return sri.extra_cost
461 238675643 : + ira_memory_move_cost[mode][(int) rclass][to_p != 0];
462 143944940 : else if (REG_P (x))
463 : {
464 46749335 : reg_class_t x_class = REGNO_REG_CLASS (REGNO (x));
465 :
466 46749335 : ira_init_register_move_cost_if_necessary (mode);
467 46749335 : return (sri.extra_cost
468 46749335 : + ira_register_move_cost[mode][(int) x_class][(int) rclass]);
469 : }
470 : else
471 : /* If this is a constant, we may eventually want to call rtx_cost
472 : here. */
473 97195605 : return sri.extra_cost + COSTS_N_INSNS (1);
474 : }
475 :
476 :
477 :
478 : /* Record the cost of using memory or hard registers of various
479 : classes for the operands in INSN.
480 :
481 : N_ALTS is the number of alternatives.
482 : N_OPS is the number of operands.
483 : OPS is an array of the operands.
484 : MODES are the modes of the operands, in case any are VOIDmode.
485 : CONSTRAINTS are the constraints to use for the operands. This array
486 : is modified by this procedure.
487 :
488 : This procedure works alternative by alternative. For each
489 : alternative we assume that we will be able to allocate all allocnos
490 : to their ideal register class and calculate the cost of using that
491 : alternative. Then we compute, for each operand that is a
492 : pseudo-register, the cost of having the allocno allocated to each
493 : register class and using it in that alternative. To this cost is
494 : added the cost of the alternative.
495 :
496 : The cost of each class for this insn is its lowest cost among all
497 : the alternatives. */
498 : static void
499 140731573 : record_reg_classes (int n_alts, int n_ops, rtx *ops,
500 : machine_mode *modes, const char **constraints,
501 : rtx_insn *insn, enum reg_class *pref)
502 : {
503 140731573 : int alt;
504 140731573 : int i, j, k;
505 140731573 : int insn_allows_mem[MAX_RECOG_OPERANDS];
506 140731573 : move_table *move_in_cost, *move_out_cost;
507 140731573 : short (*mem_cost)[2];
508 140731573 : const char *p;
509 :
510 140731573 : if (ira_dump_file != NULL && internal_flag_ira_verbose > 5)
511 : {
512 0 : fprintf (ira_dump_file, " Processing insn %u", INSN_UID (insn));
513 0 : if (INSN_CODE (insn) >= 0
514 0 : && (p = get_insn_name (INSN_CODE (insn))) != NULL)
515 0 : fprintf (ira_dump_file, " {%s}", p);
516 0 : fprintf (ira_dump_file, " (freq=%d)\n",
517 0 : REG_FREQ_FROM_BB (BLOCK_FOR_INSN (insn)));
518 0 : dump_insn_slim (ira_dump_file, insn);
519 : }
520 :
521 463685850 : for (i = 0; i < n_ops; i++)
522 322954277 : insn_allows_mem[i] = 0;
523 :
524 : /* Process each alternative, each time minimizing an operand's cost
525 : with the cost for each operand in that alternative. */
526 140731573 : alternative_mask preferred = get_preferred_alternatives (insn);
527 1619851768 : for (alt = 0; alt < n_alts; alt++)
528 : {
529 1479120195 : enum reg_class classes[MAX_RECOG_OPERANDS];
530 1479120195 : int allows_mem[MAX_RECOG_OPERANDS];
531 1479120195 : enum reg_class rclass;
532 1479120195 : int alt_fail = 0;
533 1479120195 : int alt_cost = 0, op_cost_add;
534 :
535 1479120195 : if (!TEST_BIT (preferred, alt))
536 : {
537 1606434846 : for (i = 0; i < recog_data.n_operands; i++)
538 2238834502 : constraints[i] = skip_alternative (constraints[i]);
539 :
540 978774653 : continue;
541 : }
542 :
543 992102600 : if (ira_dump_file != NULL && internal_flag_ira_verbose > 5)
544 : {
545 0 : fprintf (ira_dump_file, " Alt %d:", alt);
546 0 : for (i = 0; i < n_ops; i++)
547 : {
548 0 : p = constraints[i];
549 0 : if (*p == '\0')
550 0 : continue;
551 0 : fprintf (ira_dump_file, " (%d) ", i);
552 0 : for (; *p != '\0' && *p != ',' && *p != '#'; p++)
553 0 : fputc (*p, ira_dump_file);
554 : }
555 0 : fprintf (ira_dump_file, "\n");
556 : }
557 :
558 2353603724 : for (i = 0; i < n_ops; i++)
559 : {
560 1853258182 : unsigned char c;
561 1853258182 : const char *p = constraints[i];
562 1853258182 : rtx op = ops[i];
563 1853258182 : machine_mode mode = modes[i];
564 1853258182 : int allows_addr = 0;
565 1853258182 : int win = 0;
566 :
567 : /* Initially show we know nothing about the register class. */
568 1853258182 : classes[i] = NO_REGS;
569 1853258182 : allows_mem[i] = 0;
570 :
571 : /* If this operand has no constraints at all, we can
572 : conclude nothing about it since anything is valid. */
573 1853258182 : if (*p == 0)
574 : {
575 29877241 : if (REG_P (op) && REGNO (op) >= FIRST_PSEUDO_REGISTER)
576 3 : memset (this_op_costs[i], 0, struct_costs_size);
577 29877241 : continue;
578 : }
579 :
580 : /* If this alternative is only relevant when this operand
581 : matches a previous operand, we do different things
582 : depending on whether this operand is a allocno-reg or not.
583 : We must process any modifiers for the operand before we
584 : can make this test. */
585 1926121528 : while (*p == '%' || *p == '=' || *p == '+' || *p == '&')
586 102740587 : p++;
587 :
588 1823380941 : if (p[0] >= '0' && p[0] <= '0' + i)
589 : {
590 : /* Copy class and whether memory is allowed from the
591 : matching alternative. Then perform any needed cost
592 : computations and/or adjustments. */
593 97232855 : j = p[0] - '0';
594 97232855 : classes[i] = classes[j];
595 97232855 : allows_mem[i] = allows_mem[j];
596 97232855 : if (allows_mem[i])
597 46094632 : insn_allows_mem[i] = 1;
598 :
599 97232855 : if (! REG_P (op) || REGNO (op) < FIRST_PSEUDO_REGISTER)
600 : {
601 : /* If this matches the other operand, we have no
602 : added cost and we win. */
603 49929445 : if (rtx_equal_p (ops[j], op))
604 1823380941 : win = 1;
605 : /* If we can put the other operand into a register,
606 : add to the cost of this alternative the cost to
607 : copy this operand to the register used for the
608 : other operand. */
609 34167266 : else if (classes[j] != NO_REGS)
610 : {
611 33995697 : alt_cost += copy_cost (op, mode, classes[j], 1, NULL);
612 33995697 : win = 1;
613 : }
614 : }
615 47303410 : else if (! REG_P (ops[j])
616 47303410 : || REGNO (ops[j]) < FIRST_PSEUDO_REGISTER)
617 : {
618 : /* This op is an allocno but the one it matches is
619 : not. */
620 :
621 : /* If we can't put the other operand into a
622 : register, this alternative can't be used. */
623 :
624 164056 : if (classes[j] == NO_REGS)
625 : {
626 1823380941 : alt_fail = 1;
627 : }
628 : else
629 : /* Otherwise, add to the cost of this alternative the cost
630 : to copy the other operand to the hard register used for
631 : this operand. */
632 : {
633 154106 : alt_cost += copy_cost (ops[j], mode, classes[j], 1, NULL);
634 : }
635 : }
636 : else
637 : {
638 : /* The costs of this operand are not the same as the
639 : other operand since move costs are not symmetric.
640 : Moreover, if we cannot tie them, this alternative
641 : needs to do a copy, which is one insn. */
642 47139354 : struct costs *pp = this_op_costs[i];
643 47139354 : int *pp_costs = pp->cost;
644 47139354 : cost_classes_t cost_classes_ptr
645 47139354 : = regno_cost_classes[REGNO (op)];
646 47139354 : enum reg_class *cost_classes = cost_classes_ptr->classes;
647 47139354 : bool in_p = recog_data.operand_type[i] != OP_OUT;
648 47139354 : bool out_p = recog_data.operand_type[i] != OP_IN;
649 47139354 : enum reg_class op_class = classes[i];
650 :
651 47139354 : ira_init_register_move_cost_if_necessary (mode);
652 47139354 : if (! in_p)
653 : {
654 62387 : ira_assert (out_p);
655 62387 : if (op_class == NO_REGS)
656 : {
657 0 : mem_cost = ira_memory_move_cost[mode];
658 0 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
659 : {
660 0 : rclass = cost_classes[k];
661 0 : pp_costs[k] = mem_cost[rclass][0] * frequency;
662 : }
663 : }
664 : else
665 : {
666 62387 : move_out_cost = ira_may_move_out_cost[mode];
667 865860 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
668 : {
669 803473 : rclass = cost_classes[k];
670 803473 : pp_costs[k]
671 803473 : = move_out_cost[op_class][rclass] * frequency;
672 : }
673 : }
674 : }
675 47076967 : else if (! out_p)
676 : {
677 47076967 : ira_assert (in_p);
678 47076967 : if (op_class == NO_REGS)
679 : {
680 389683 : mem_cost = ira_memory_move_cost[mode];
681 5684344 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
682 : {
683 5294661 : rclass = cost_classes[k];
684 5294661 : pp_costs[k] = mem_cost[rclass][1] * frequency;
685 : }
686 : }
687 : else
688 : {
689 46687284 : move_in_cost = ira_may_move_in_cost[mode];
690 703239250 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
691 : {
692 656551966 : rclass = cost_classes[k];
693 656551966 : pp_costs[k]
694 656551966 : = move_in_cost[rclass][op_class] * frequency;
695 : }
696 : }
697 : }
698 : else
699 : {
700 0 : if (op_class == NO_REGS)
701 : {
702 0 : mem_cost = ira_memory_move_cost[mode];
703 0 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
704 : {
705 0 : rclass = cost_classes[k];
706 0 : pp_costs[k] = ((mem_cost[rclass][0]
707 0 : + mem_cost[rclass][1])
708 0 : * frequency);
709 : }
710 : }
711 : else
712 : {
713 0 : move_in_cost = ira_may_move_in_cost[mode];
714 0 : move_out_cost = ira_may_move_out_cost[mode];
715 0 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
716 : {
717 0 : rclass = cost_classes[k];
718 0 : pp_costs[k] = ((move_in_cost[rclass][op_class]
719 0 : + move_out_cost[op_class][rclass])
720 0 : * frequency);
721 : }
722 : }
723 : }
724 :
725 47139354 : if (op_class == NO_REGS)
726 : /* Although we don't need insn to reload from
727 : memory, still accessing memory is usually more
728 : expensive than a register. */
729 389683 : pp->mem_cost = frequency;
730 : else
731 : /* If the alternative actually allows memory, make
732 : things a bit cheaper since we won't need an
733 : extra insn to load it. */
734 46749671 : pp->mem_cost
735 46749671 : = ((out_p
736 46749671 : ? ira_memory_move_cost[mode][op_class][0] : 0)
737 46749671 : + (in_p
738 46749671 : ? ira_memory_move_cost[mode][op_class][1] : 0)
739 46749671 : - allows_mem[i]) * frequency;
740 :
741 : /* If we have assigned a class to this allocno in
742 : our first pass, add a cost to this alternative
743 : corresponding to what we would add if this
744 : allocno were not in the appropriate class. */
745 47139354 : if (pref)
746 : {
747 17962857 : enum reg_class pref_class = pref[COST_INDEX (REGNO (op))];
748 :
749 17962857 : if (pref_class == NO_REGS)
750 : {
751 618208 : if (op_class != NO_REGS)
752 615407 : alt_cost
753 615407 : += ((out_p
754 615407 : ? ira_memory_move_cost[mode][op_class][0]
755 : : 0)
756 615407 : + (in_p
757 615407 : ? ira_memory_move_cost[mode][op_class][1]
758 : : 0));
759 : }
760 17344649 : else if (op_class == NO_REGS)
761 155430 : alt_cost
762 155430 : += ((out_p
763 155430 : ? ira_memory_move_cost[mode][pref_class][0]
764 : : 0)
765 155430 : + (in_p
766 155430 : ? ira_memory_move_cost[mode][pref_class][1]
767 : : 0));
768 17189219 : else if (ira_reg_class_intersect
769 17189219 : [pref_class][op_class] == NO_REGS)
770 150219 : alt_cost += (ira_register_move_cost
771 150219 : [mode][pref_class][op_class]);
772 : }
773 47139354 : if (REGNO (ops[i]) != REGNO (ops[j])
774 47139354 : && ! find_reg_note (insn, REG_DEAD, op))
775 13161446 : alt_cost += 2;
776 :
777 47139354 : p++;
778 : }
779 : }
780 :
781 : /* Scan all the constraint letters. See if the operand
782 : matches any of the constraints. Collect the valid
783 : register classes and see if this operand accepts
784 : memory. */
785 4401325941 : while ((c = *p))
786 : {
787 4335051104 : switch (c)
788 : {
789 322505157 : case '*':
790 : /* Ignore the next letter for this pass. */
791 322505157 : c = *++p;
792 322505157 : break;
793 :
794 0 : case '^':
795 0 : alt_cost += 2;
796 0 : break;
797 :
798 513218065 : case '?':
799 513218065 : alt_cost += 2;
800 513218065 : break;
801 :
802 12798229 : case 'g':
803 12798229 : if (MEM_P (op)
804 12798229 : || (CONSTANT_P (op)
805 5184848 : && (! flag_pic || LEGITIMATE_PIC_OPERAND_P (op))))
806 : win = 1;
807 12798229 : insn_allows_mem[i] = allows_mem[i] = 1;
808 12798229 : classes[i] = ira_reg_class_subunion[classes[i]][GENERAL_REGS];
809 12798229 : break;
810 :
811 3486529653 : default:
812 3486529653 : enum constraint_num cn = lookup_constraint (p);
813 3486529653 : enum reg_class cl;
814 3486529653 : switch (get_constraint_type (cn))
815 : {
816 2834598344 : case CT_REGISTER:
817 2834598344 : cl = reg_class_for_constraint (cn);
818 1012276904 : if (cl != NO_REGS)
819 1001713661 : classes[i] = ira_reg_class_subunion[classes[i]][cl];
820 : break;
821 :
822 4927492 : case CT_CONST_INT:
823 4927492 : if (CONST_INT_P (op)
824 4927492 : && insn_const_int_ok_for_constraint (INTVAL (op), cn))
825 : win = 1;
826 : break;
827 :
828 278786133 : case CT_MEMORY:
829 278786133 : case CT_RELAXED_MEMORY:
830 : /* Every MEM can be reloaded to fit. */
831 278786133 : insn_allows_mem[i] = allows_mem[i] = 1;
832 278786133 : if (MEM_P (op))
833 80298721 : win = 1;
834 : break;
835 :
836 40298069 : case CT_SPECIAL_MEMORY:
837 40298069 : insn_allows_mem[i] = allows_mem[i] = 1;
838 40298069 : if (MEM_P (extract_mem_from_operand (op))
839 40298069 : && constraint_satisfied_p (op, cn))
840 : win = 1;
841 : break;
842 :
843 1137771 : case CT_ADDRESS:
844 : /* Every address can be reloaded to fit. */
845 1137771 : allows_addr = 1;
846 1137771 : if (address_operand (op, GET_MODE (op))
847 1137771 : || constraint_satisfied_p (op, cn))
848 : win = 1;
849 : /* We know this operand is an address, so we
850 : want it to be allocated to a hard register
851 : that can be the base of an address,
852 : i.e. BASE_REG_CLASS. */
853 1137771 : classes[i]
854 2275542 : = ira_reg_class_subunion[classes[i]]
855 1137771 : [base_reg_class (VOIDmode, ADDR_SPACE_GENERIC,
856 1137771 : ADDRESS, SCRATCH)];
857 1137771 : break;
858 :
859 326781844 : case CT_FIXED_FORM:
860 326781844 : if (constraint_satisfied_p (op, cn))
861 4335051104 : win = 1;
862 : break;
863 : }
864 : break;
865 : }
866 4335051104 : p += CONSTRAINT_LEN (c, p);
867 4335051104 : if (c == ',')
868 : break;
869 : }
870 :
871 1823380941 : constraints[i] = p;
872 :
873 1823380941 : if (alt_fail)
874 : break;
875 :
876 : /* How we account for this operand now depends on whether it
877 : is a pseudo register or not. If it is, we first check if
878 : any register classes are valid. If not, we ignore this
879 : alternative, since we want to assume that all allocnos get
880 : allocated for register preferencing. If some register
881 : class is valid, compute the costs of moving the allocno
882 : into that class. */
883 1823370991 : if (REG_P (op) && REGNO (op) >= FIRST_PSEUDO_REGISTER)
884 : {
885 822134900 : if (classes[i] == NO_REGS && ! allows_mem[i])
886 : {
887 : /* We must always fail if the operand is a REG, but
888 : we did not find a suitable class and memory is
889 : not allowed.
890 :
891 : Otherwise we may perform an uninitialized read
892 : from this_op_costs after the `continue' statement
893 : below. */
894 : alt_fail = 1;
895 : }
896 : else
897 : {
898 617037510 : unsigned int regno = REGNO (op);
899 617037510 : struct costs *pp = this_op_costs[i];
900 617037510 : int *pp_costs = pp->cost;
901 617037510 : cost_classes_t cost_classes_ptr = regno_cost_classes[regno];
902 617037510 : enum reg_class *cost_classes = cost_classes_ptr->classes;
903 617037510 : bool in_p = recog_data.operand_type[i] != OP_OUT;
904 617037510 : bool out_p = recog_data.operand_type[i] != OP_IN;
905 617037510 : enum reg_class op_class = classes[i];
906 :
907 617037510 : ira_init_register_move_cost_if_necessary (mode);
908 617037510 : if (! in_p)
909 : {
910 394197874 : ira_assert (out_p);
911 394197874 : if (op_class == NO_REGS)
912 : {
913 72305556 : mem_cost = ira_memory_move_cost[mode];
914 1118830356 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
915 : {
916 1046524800 : rclass = cost_classes[k];
917 1046524800 : pp_costs[k] = mem_cost[rclass][0] * frequency;
918 : }
919 : }
920 : else
921 : {
922 321892318 : move_out_cost = ira_may_move_out_cost[mode];
923 4882900563 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
924 : {
925 4561008245 : rclass = cost_classes[k];
926 4561008245 : pp_costs[k]
927 4561008245 : = move_out_cost[op_class][rclass] * frequency;
928 : }
929 : }
930 : }
931 222839636 : else if (! out_p)
932 : {
933 222826239 : ira_assert (in_p);
934 222826239 : if (op_class == NO_REGS)
935 : {
936 16610467 : mem_cost = ira_memory_move_cost[mode];
937 244465259 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
938 : {
939 227854792 : rclass = cost_classes[k];
940 227854792 : pp_costs[k] = mem_cost[rclass][1] * frequency;
941 : }
942 : }
943 : else
944 : {
945 206215772 : move_in_cost = ira_may_move_in_cost[mode];
946 3025491267 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
947 : {
948 2819275495 : rclass = cost_classes[k];
949 2819275495 : pp_costs[k]
950 2819275495 : = move_in_cost[rclass][op_class] * frequency;
951 : }
952 : }
953 : }
954 : else
955 : {
956 13397 : if (op_class == NO_REGS)
957 : {
958 0 : mem_cost = ira_memory_move_cost[mode];
959 0 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
960 : {
961 0 : rclass = cost_classes[k];
962 0 : pp_costs[k] = ((mem_cost[rclass][0]
963 0 : + mem_cost[rclass][1])
964 0 : * frequency);
965 : }
966 : }
967 : else
968 : {
969 13397 : move_in_cost = ira_may_move_in_cost[mode];
970 13397 : move_out_cost = ira_may_move_out_cost[mode];
971 157808 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
972 : {
973 144411 : rclass = cost_classes[k];
974 144411 : pp_costs[k] = ((move_in_cost[rclass][op_class]
975 144411 : + move_out_cost[op_class][rclass])
976 144411 : * frequency);
977 : }
978 : }
979 : }
980 :
981 617037510 : if (op_class == NO_REGS)
982 : /* Although we don't need insn to reload from
983 : memory, still accessing memory is usually more
984 : expensive than a register. */
985 88916023 : pp->mem_cost = frequency;
986 : else
987 : /* If the alternative actually allows memory, make
988 : things a bit cheaper since we won't need an
989 : extra insn to load it. */
990 528121487 : pp->mem_cost
991 528121487 : = ((out_p ? ira_memory_move_cost[mode][op_class][0] : 0)
992 528121487 : + (in_p ? ira_memory_move_cost[mode][op_class][1] : 0)
993 528121487 : - allows_mem[i]) * frequency;
994 : /* If we have assigned a class to this allocno in
995 : our first pass, add a cost to this alternative
996 : corresponding to what we would add if this
997 : allocno were not in the appropriate class. */
998 617037510 : if (pref)
999 : {
1000 225479658 : enum reg_class pref_class = pref[COST_INDEX (REGNO (op))];
1001 :
1002 225479658 : if (pref_class == NO_REGS)
1003 : {
1004 4297367 : if (op_class != NO_REGS)
1005 3472989 : alt_cost
1006 3472989 : += ((out_p
1007 3472989 : ? ira_memory_move_cost[mode][op_class][0]
1008 : : 0)
1009 3472989 : + (in_p
1010 3472989 : ? ira_memory_move_cost[mode][op_class][1]
1011 : : 0));
1012 : }
1013 221182291 : else if (op_class == NO_REGS)
1014 30287643 : alt_cost
1015 30287643 : += ((out_p
1016 30287643 : ? ira_memory_move_cost[mode][pref_class][0]
1017 : : 0)
1018 30287643 : + (in_p
1019 30287643 : ? ira_memory_move_cost[mode][pref_class][1]
1020 : : 0));
1021 190894648 : else if (ira_reg_class_intersect[pref_class][op_class]
1022 : == NO_REGS)
1023 40669881 : alt_cost += (ira_register_move_cost
1024 40669881 : [mode][pref_class][op_class]);
1025 : }
1026 : }
1027 : }
1028 :
1029 : /* Otherwise, if this alternative wins, either because we
1030 : have already determined that or if we have a hard
1031 : register of the proper class, there is no cost for this
1032 : alternative. */
1033 1001236091 : else if (win || (REG_P (op)
1034 240268704 : && reg_fits_class_p (op, classes[i],
1035 240268704 : 0, GET_MODE (op))))
1036 : ;
1037 :
1038 : /* If registers are valid, the cost of this alternative
1039 : includes copying the object to and/or from a
1040 : register. */
1041 656352868 : else if (classes[i] != NO_REGS)
1042 : {
1043 348480315 : if (recog_data.operand_type[i] != OP_OUT)
1044 185891861 : alt_cost += copy_cost (op, mode, classes[i], 1, NULL);
1045 :
1046 348480315 : if (recog_data.operand_type[i] != OP_IN)
1047 162588478 : alt_cost += copy_cost (op, mode, classes[i], 0, NULL);
1048 : }
1049 : /* The only other way this alternative can be used is if
1050 : this is a constant that could be placed into memory. */
1051 307872553 : else if (CONSTANT_P (op) && (allows_addr || allows_mem[i]))
1052 21222835 : alt_cost += ira_memory_move_cost[mode][classes[i]][1];
1053 : else
1054 : alt_fail = 1;
1055 :
1056 : if (alt_fail)
1057 : break;
1058 : }
1059 :
1060 992102600 : if (alt_fail)
1061 : {
1062 : /* The loop above might have exited early once the failure
1063 : was seen. Skip over the constraints for the remaining
1064 : operands. */
1065 491757058 : i += 1;
1066 788978927 : for (; i < n_ops; ++i)
1067 594443738 : constraints[i] = skip_alternative (constraints[i]);
1068 491757058 : continue;
1069 : }
1070 :
1071 500345542 : op_cost_add = alt_cost * frequency;
1072 : /* Finally, update the costs with the information we've
1073 : calculated about this alternative. */
1074 1618875378 : for (i = 0; i < n_ops; i++)
1075 1118529836 : if (REG_P (ops[i]) && REGNO (ops[i]) >= FIRST_PSEUDO_REGISTER)
1076 : {
1077 471790331 : int old_cost;
1078 471790331 : bool cost_change_p = false;
1079 471790331 : struct costs *pp = op_costs[i], *qq = this_op_costs[i];
1080 471790331 : int *pp_costs = pp->cost, *qq_costs = qq->cost;
1081 471790331 : int scale = 1 + (recog_data.operand_type[i] == OP_INOUT);
1082 471790331 : cost_classes_t cost_classes_ptr
1083 471790331 : = regno_cost_classes[REGNO (ops[i])];
1084 :
1085 471790331 : old_cost = pp->mem_cost;
1086 471790331 : pp->mem_cost = MIN (old_cost,
1087 : (qq->mem_cost + op_cost_add) * scale);
1088 :
1089 471790331 : if (ira_dump_file != NULL && internal_flag_ira_verbose > 5
1090 0 : && pp->mem_cost < old_cost)
1091 : {
1092 0 : cost_change_p = true;
1093 0 : fprintf (ira_dump_file, " op %d(r=%u) new costs MEM:%d",
1094 : i, REGNO(ops[i]), pp->mem_cost);
1095 : }
1096 7050311029 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
1097 : {
1098 6578520698 : old_cost = pp_costs[k];
1099 6578520698 : pp_costs[k]
1100 6578520698 : = MIN (old_cost, (qq_costs[k] + op_cost_add) * scale);
1101 6578520698 : if (ira_dump_file != NULL && internal_flag_ira_verbose > 5
1102 0 : && pp_costs[k] < old_cost)
1103 : {
1104 0 : if (!cost_change_p)
1105 0 : fprintf (ira_dump_file, " op %d(r=%u) new costs",
1106 : i, REGNO(ops[i]));
1107 0 : cost_change_p = true;
1108 0 : fprintf (ira_dump_file, " %s:%d",
1109 0 : reg_class_names[cost_classes_ptr->classes[k]],
1110 : pp_costs[k]);
1111 : }
1112 : }
1113 471790331 : if (ira_dump_file != NULL && internal_flag_ira_verbose > 5
1114 0 : && cost_change_p)
1115 0 : fprintf (ira_dump_file, "\n");
1116 : }
1117 : }
1118 :
1119 140731573 : if (allocno_p)
1120 451201896 : for (i = 0; i < n_ops; i++)
1121 : {
1122 314245773 : ira_allocno_t a;
1123 314245773 : rtx op = ops[i];
1124 :
1125 314245773 : if (! REG_P (op) || REGNO (op) < FIRST_PSEUDO_REGISTER)
1126 182838028 : continue;
1127 131407745 : a = ira_curr_regno_allocno_map [REGNO (op)];
1128 131407745 : if (! ALLOCNO_BAD_SPILL_P (a) && insn_allows_mem[i] == 0)
1129 12197487 : ALLOCNO_BAD_SPILL_P (a) = true;
1130 : }
1131 :
1132 140731573 : }
1133 :
1134 :
1135 :
1136 : /* Wrapper around REGNO_OK_FOR_INDEX_P, to allow pseudo registers. */
1137 : static inline bool
1138 134438 : ok_for_index_p_nonstrict (rtx reg)
1139 : {
1140 134438 : unsigned regno = REGNO (reg);
1141 :
1142 134438 : return regno >= FIRST_PSEUDO_REGISTER || REGNO_OK_FOR_INDEX_P (regno);
1143 : }
1144 :
1145 : /* A version of regno_ok_for_base_p for use here, when all
1146 : pseudo-registers should count as OK. Arguments as for
1147 : regno_ok_for_base_p. */
1148 : static inline bool
1149 136086 : ok_for_base_p_nonstrict (rtx reg, machine_mode mode, addr_space_t as,
1150 : enum rtx_code outer_code, enum rtx_code index_code)
1151 : {
1152 136086 : unsigned regno = REGNO (reg);
1153 :
1154 824 : if (regno >= FIRST_PSEUDO_REGISTER)
1155 : return true;
1156 824 : return ok_for_base_p_1 (regno, mode, as, outer_code, index_code);
1157 : }
1158 :
1159 : /* Record the pseudo registers we must reload into hard registers in a
1160 : subexpression of a memory address, X.
1161 :
1162 : If CONTEXT is 0, we are looking at the base part of an address,
1163 : otherwise we are looking at the index part.
1164 :
1165 : MODE and AS are the mode and address space of the memory reference;
1166 : OUTER_CODE and INDEX_CODE give the context that the rtx appears in.
1167 : These four arguments are passed down to base_reg_class.
1168 :
1169 : SCALE is twice the amount to multiply the cost by (it is twice so
1170 : we can represent half-cost adjustments). */
1171 : static void
1172 93861546 : record_address_regs (machine_mode mode, addr_space_t as, rtx x,
1173 : int context, enum rtx_code outer_code,
1174 : enum rtx_code index_code, int scale)
1175 : {
1176 93861546 : enum rtx_code code = GET_CODE (x);
1177 93861546 : enum reg_class rclass;
1178 :
1179 93861546 : if (context == 1)
1180 : rclass = INDEX_REG_CLASS;
1181 : else
1182 86777686 : rclass = base_reg_class (mode, as, outer_code, index_code);
1183 :
1184 93861546 : switch (code)
1185 : {
1186 : case CONST_INT:
1187 : case CONST:
1188 : case PC:
1189 : case SYMBOL_REF:
1190 : case LABEL_REF:
1191 : return;
1192 :
1193 32964521 : case PLUS:
1194 : /* When we have an address that is a sum, we must determine
1195 : whether registers are "base" or "index" regs. If there is a
1196 : sum of two registers, we must choose one to be the "base".
1197 : Luckily, we can use the REG_POINTER to make a good choice
1198 : most of the time. We only need to do this on machines that
1199 : can have two registers in an address and where the base and
1200 : index register classes are different.
1201 :
1202 : ??? This code used to set REGNO_POINTER_FLAG in some cases,
1203 : but that seems bogus since it should only be set when we are
1204 : sure the register is being used as a pointer. */
1205 32964521 : {
1206 32964521 : rtx arg0 = XEXP (x, 0);
1207 32964521 : rtx arg1 = XEXP (x, 1);
1208 32964521 : enum rtx_code code0 = GET_CODE (arg0);
1209 32964521 : enum rtx_code code1 = GET_CODE (arg1);
1210 :
1211 : /* Look inside subregs. */
1212 32964521 : if (code0 == SUBREG)
1213 12442 : arg0 = SUBREG_REG (arg0), code0 = GET_CODE (arg0);
1214 32964521 : if (code1 == SUBREG)
1215 5634 : arg1 = SUBREG_REG (arg1), code1 = GET_CODE (arg1);
1216 :
1217 : /* If index registers do not appear, or coincide with base registers,
1218 : just record registers in any non-constant operands. We
1219 : assume here, as well as in the tests below, that all
1220 : addresses are in canonical form. */
1221 65929042 : if (MAX_REGS_PER_ADDRESS == 1
1222 32964521 : || INDEX_REG_CLASS == base_reg_class (VOIDmode, as, PLUS, SCRATCH))
1223 : {
1224 0 : record_address_regs (mode, as, arg0, context, PLUS, code1, scale);
1225 0 : if (! CONSTANT_P (arg1))
1226 0 : record_address_regs (mode, as, arg1, context, PLUS, code0, scale);
1227 : }
1228 :
1229 : /* If the second operand is a constant integer, it doesn't
1230 : change what class the first operand must be. */
1231 32964521 : else if (CONST_SCALAR_INT_P (arg1))
1232 29577326 : record_address_regs (mode, as, arg0, context, PLUS, code1, scale);
1233 : /* If the second operand is a symbolic constant, the first
1234 : operand must be an index register. */
1235 3387195 : else if (code1 == SYMBOL_REF || code1 == CONST || code1 == LABEL_REF)
1236 910917 : record_address_regs (mode, as, arg0, 1, PLUS, code1, scale);
1237 : /* If both operands are registers but one is already a hard
1238 : register of index or reg-base class, give the other the
1239 : class that the hard register is not. */
1240 2476278 : else if (code0 == REG && code1 == REG
1241 1284546 : && REGNO (arg0) < FIRST_PSEUDO_REGISTER
1242 2610946 : && (ok_for_base_p_nonstrict (arg0, mode, as, PLUS, REG)
1243 133852 : || ok_for_index_p_nonstrict (arg0)))
1244 2448 : record_address_regs (mode, as, arg1,
1245 2448 : ok_for_base_p_nonstrict (arg0, mode, as,
1246 : PLUS, REG) ? 1 : 0,
1247 : PLUS, REG, scale);
1248 2475462 : else if (code0 == REG && code1 == REG
1249 1283730 : && REGNO (arg1) < FIRST_PSEUDO_REGISTER
1250 2476056 : && (ok_for_base_p_nonstrict (arg1, mode, as, PLUS, REG)
1251 586 : || ok_for_index_p_nonstrict (arg1)))
1252 24 : record_address_regs (mode, as, arg0,
1253 24 : ok_for_base_p_nonstrict (arg1, mode, as,
1254 : PLUS, REG) ? 1 : 0,
1255 : PLUS, REG, scale);
1256 : /* If one operand is known to be a pointer, it must be the
1257 : base with the other operand the index. Likewise if the
1258 : other operand is a MULT. */
1259 2475454 : else if ((code0 == REG && REG_POINTER (arg0)) || code1 == MULT)
1260 : {
1261 1065408 : record_address_regs (mode, as, arg0, 0, PLUS, code1, scale);
1262 1065408 : record_address_regs (mode, as, arg1, 1, PLUS, code0, scale);
1263 : }
1264 1410046 : else if ((code1 == REG && REG_POINTER (arg1)) || code0 == MULT)
1265 : {
1266 1030658 : record_address_regs (mode, as, arg0, 1, PLUS, code1, scale);
1267 1030658 : record_address_regs (mode, as, arg1, 0, PLUS, code0, scale);
1268 : }
1269 : /* Otherwise, count equal chances that each might be a base or
1270 : index register. This case should be rare. */
1271 : else
1272 : {
1273 379388 : record_address_regs (mode, as, arg0, 0, PLUS, code1, scale / 2);
1274 379388 : record_address_regs (mode, as, arg0, 1, PLUS, code1, scale / 2);
1275 379388 : record_address_regs (mode, as, arg1, 0, PLUS, code0, scale / 2);
1276 379388 : record_address_regs (mode, as, arg1, 1, PLUS, code0, scale / 2);
1277 : }
1278 : }
1279 : break;
1280 :
1281 : /* Double the importance of an allocno that is incremented or
1282 : decremented, since it would take two extra insns if it ends
1283 : up in the wrong place. */
1284 166736 : case POST_MODIFY:
1285 166736 : case PRE_MODIFY:
1286 166736 : record_address_regs (mode, as, XEXP (x, 0), 0, code,
1287 166736 : GET_CODE (XEXP (XEXP (x, 1), 1)), 2 * scale);
1288 166736 : if (REG_P (XEXP (XEXP (x, 1), 1)))
1289 0 : record_address_regs (mode, as, XEXP (XEXP (x, 1), 1), 1, code, REG,
1290 : 2 * scale);
1291 : break;
1292 :
1293 3376030 : case POST_INC:
1294 3376030 : case PRE_INC:
1295 3376030 : case POST_DEC:
1296 3376030 : case PRE_DEC:
1297 : /* Double the importance of an allocno that is incremented or
1298 : decremented, since it would take two extra insns if it ends
1299 : up in the wrong place. */
1300 3376030 : record_address_regs (mode, as, XEXP (x, 0), 0, code, SCRATCH, 2 * scale);
1301 3376030 : break;
1302 :
1303 44987771 : case REG:
1304 44987771 : {
1305 44987771 : struct costs *pp;
1306 44987771 : int *pp_costs;
1307 44987771 : enum reg_class i;
1308 44987771 : int k, regno, add_cost;
1309 44987771 : cost_classes_t cost_classes_ptr;
1310 44987771 : enum reg_class *cost_classes;
1311 44987771 : move_table *move_in_cost;
1312 :
1313 44987771 : if (REGNO (x) < FIRST_PSEUDO_REGISTER)
1314 : break;
1315 :
1316 20360062 : regno = REGNO (x);
1317 20360062 : if (allocno_p)
1318 20039295 : ALLOCNO_BAD_SPILL_P (ira_curr_regno_allocno_map[regno]) = true;
1319 20360062 : pp = COSTS (costs, COST_INDEX (regno));
1320 20360062 : add_cost = (ira_memory_move_cost[Pmode][rclass][1] * scale) / 2;
1321 20360062 : if (INT_MAX - add_cost < pp->mem_cost)
1322 0 : pp->mem_cost = INT_MAX;
1323 : else
1324 20360062 : pp->mem_cost += add_cost;
1325 20360062 : cost_classes_ptr = regno_cost_classes[regno];
1326 20360062 : cost_classes = cost_classes_ptr->classes;
1327 20360062 : pp_costs = pp->cost;
1328 20360062 : ira_init_register_move_cost_if_necessary (Pmode);
1329 20360062 : move_in_cost = ira_may_move_in_cost[Pmode];
1330 330360960 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
1331 : {
1332 310000898 : i = cost_classes[k];
1333 310000898 : add_cost = (move_in_cost[i][rclass] * scale) / 2;
1334 310000898 : if (INT_MAX - add_cost < pp_costs[k])
1335 14447 : pp_costs[k] = INT_MAX;
1336 : else
1337 309986451 : pp_costs[k] += add_cost;
1338 : }
1339 : }
1340 : break;
1341 :
1342 2194174 : default:
1343 2194174 : {
1344 2194174 : const char *fmt = GET_RTX_FORMAT (code);
1345 2194174 : int i;
1346 6077659 : for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
1347 3883485 : if (fmt[i] == 'e')
1348 3866841 : record_address_regs (mode, as, XEXP (x, i), context, code, SCRATCH,
1349 : scale);
1350 : }
1351 : }
1352 : }
1353 :
1354 :
1355 :
1356 : /* Calculate the costs of insn operands. */
1357 : static void
1358 141772395 : record_operand_costs (rtx_insn *insn, enum reg_class *pref)
1359 : {
1360 141772395 : const char *constraints[MAX_RECOG_OPERANDS];
1361 141772395 : machine_mode modes[MAX_RECOG_OPERANDS];
1362 141772395 : rtx set;
1363 141772395 : int i;
1364 :
1365 141772395 : if ((set = single_set (insn)) != NULL_RTX
1366 : /* In rare cases the single set insn might have less 2 operands
1367 : as the source can be a fixed special reg. */
1368 134033728 : && recog_data.n_operands > 1
1369 128990939 : && recog_data.operand[0] == SET_DEST (set)
1370 247639401 : && recog_data.operand[1] == SET_SRC (set))
1371 : {
1372 76648097 : int regno, other_regno;
1373 76648097 : rtx dest = SET_DEST (set);
1374 76648097 : rtx src = SET_SRC (set);
1375 :
1376 76648097 : if (GET_CODE (dest) == SUBREG
1377 78713051 : && known_eq (GET_MODE_SIZE (GET_MODE (dest)),
1378 : GET_MODE_SIZE (GET_MODE (SUBREG_REG (dest)))))
1379 : dest = SUBREG_REG (dest);
1380 76648097 : if (GET_CODE (src) == SUBREG
1381 79626355 : && known_eq (GET_MODE_SIZE (GET_MODE (src)),
1382 : GET_MODE_SIZE (GET_MODE (SUBREG_REG (src)))))
1383 : src = SUBREG_REG (src);
1384 36114311 : if (REG_P (src) && REG_P (dest)
1385 98159539 : && (((regno = REGNO (src)) >= FIRST_PSEUDO_REGISTER
1386 14967731 : && (other_regno = REGNO (dest)) < FIRST_PSEUDO_REGISTER)
1387 10110294 : || ((regno = REGNO (dest)) >= FIRST_PSEUDO_REGISTER
1388 10081581 : && (other_regno = REGNO (src)) < FIRST_PSEUDO_REGISTER)))
1389 : {
1390 17916146 : machine_mode mode = GET_MODE (SET_SRC (set)), cost_mode = mode;
1391 17916146 : machine_mode hard_reg_mode = GET_MODE(regno_reg_rtx[other_regno]);
1392 35832292 : poly_int64 pmode_size = GET_MODE_SIZE (mode);
1393 35832292 : poly_int64 phard_reg_mode_size = GET_MODE_SIZE (hard_reg_mode);
1394 17916146 : HOST_WIDE_INT mode_size, hard_reg_mode_size;
1395 17916146 : cost_classes_t cost_classes_ptr = regno_cost_classes[regno];
1396 17916146 : enum reg_class *cost_classes = cost_classes_ptr->classes;
1397 17916146 : reg_class_t rclass, hard_reg_class, bigger_hard_reg_class;
1398 17916146 : int cost_factor = 1, cost, k;
1399 17916146 : move_table *move_costs;
1400 17916146 : bool dead_p = find_regno_note (insn, REG_DEAD, REGNO (src));
1401 :
1402 17916146 : hard_reg_class = REGNO_REG_CLASS (other_regno);
1403 17916146 : bigger_hard_reg_class = ira_pressure_class_translate[hard_reg_class];
1404 : /* Target code may return any cost for mode which does not fit the
1405 : hard reg class (e.g. DImode for AREG on i386). Check this and use
1406 : a bigger class to get the right cost. */
1407 17916146 : if (bigger_hard_reg_class != NO_REGS
1408 17916146 : && ! ira_hard_reg_in_set_p (other_regno, mode,
1409 : reg_class_contents[hard_reg_class]))
1410 : hard_reg_class = bigger_hard_reg_class;
1411 17916146 : ira_init_register_move_cost_if_necessary (mode);
1412 17916146 : ira_init_register_move_cost_if_necessary (hard_reg_mode);
1413 : /* Use smaller movement cost for natural hard reg mode or its mode as
1414 : operand. */
1415 17916146 : if (pmode_size.is_constant (&mode_size)
1416 17916146 : && phard_reg_mode_size.is_constant (&hard_reg_mode_size))
1417 : {
1418 : /* Assume we are moving in the natural modes: */
1419 17916146 : cost_factor = mode_size / hard_reg_mode_size;
1420 17916146 : if (mode_size % hard_reg_mode_size != 0)
1421 3798507 : cost_factor++;
1422 17916146 : if (cost_factor
1423 17916146 : * (ira_register_move_cost
1424 17916146 : [hard_reg_mode][hard_reg_class][hard_reg_class])
1425 : < (ira_register_move_cost
1426 17916146 : [mode][hard_reg_class][hard_reg_class]))
1427 0 : cost_mode = hard_reg_mode;
1428 : else
1429 : cost_factor = 1;
1430 : }
1431 17916146 : move_costs = ira_register_move_cost[cost_mode];
1432 17916146 : i = regno == (int) REGNO (src) ? 1 : 0;
1433 336357509 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
1434 : {
1435 318441363 : rclass = cost_classes[k];
1436 636882726 : cost = (i == 0
1437 318441363 : ? move_costs[hard_reg_class][rclass]
1438 204378093 : : move_costs[rclass][hard_reg_class]);
1439 318441363 : cost *= cost_factor;
1440 318441363 : op_costs[i]->cost[k] = cost * frequency;
1441 : /* If this insn is a single set copying operand 1 to
1442 : operand 0 and one operand is an allocno with the
1443 : other a hard reg or an allocno that prefers a hard
1444 : register that is in its own register class then we
1445 : may want to adjust the cost of that register class to
1446 : -1.
1447 :
1448 : Avoid the adjustment if the source does not die to
1449 : avoid stressing of register allocator by preferencing
1450 : two colliding registers into single class. */
1451 318441363 : if (dead_p
1452 257319017 : && TEST_HARD_REG_BIT (reg_class_contents[rclass], other_regno)
1453 318441363 : && (reg_class_size[(int) rclass]
1454 : == (ira_reg_class_max_nregs
1455 106453080 : [(int) rclass][(int) GET_MODE(src)])))
1456 : {
1457 13534927 : if (reg_class_size[rclass] == 1)
1458 13379804 : op_costs[i]->cost[k] = -frequency;
1459 155123 : else if (in_hard_reg_set_p (reg_class_contents[rclass],
1460 : GET_MODE(src), other_regno))
1461 127162 : op_costs[i]->cost[k] = -frequency;
1462 : }
1463 : }
1464 17916146 : op_costs[i]->mem_cost
1465 17916146 : = ira_memory_move_cost[mode][hard_reg_class][i] * frequency;
1466 17916146 : return;
1467 : }
1468 : }
1469 :
1470 395343244 : for (i = 0; i < recog_data.n_operands; i++)
1471 : {
1472 271486995 : constraints[i] = recog_data.constraints[i];
1473 271486995 : modes[i] = recog_data.operand_mode[i];
1474 : }
1475 :
1476 : /* If we get here, we are set up to record the costs of all the
1477 : operands for this insn. Start by initializing the costs. Then
1478 : handle any address registers. Finally record the desired classes
1479 : for any allocnos, doing it twice if some pair of operands are
1480 : commutative. */
1481 395343244 : for (i = 0; i < recog_data.n_operands; i++)
1482 : {
1483 271486995 : rtx op_mem = extract_mem_from_operand (recog_data.operand[i]);
1484 271486995 : memcpy (op_costs[i], init_cost, struct_costs_size);
1485 :
1486 271486995 : if (GET_CODE (recog_data.operand[i]) == SUBREG)
1487 5266212 : recog_data.operand[i] = SUBREG_REG (recog_data.operand[i]);
1488 :
1489 271486995 : if (MEM_P (op_mem))
1490 44662322 : record_address_regs (GET_MODE (op_mem),
1491 44662322 : MEM_ADDR_SPACE (op_mem),
1492 : XEXP (op_mem, 0),
1493 : 0, MEM, SCRATCH, frequency * 2);
1494 226824673 : else if (constraints[i][0] == 'p'
1495 453645244 : || (insn_extra_address_constraint
1496 226820571 : (lookup_constraint (constraints[i]))))
1497 1137760 : record_address_regs (VOIDmode, ADDR_SPACE_GENERIC,
1498 : recog_data.operand[i], 0, ADDRESS, SCRATCH,
1499 : frequency * 2);
1500 : }
1501 :
1502 : /* Check for commutative in a separate loop so everything will have
1503 : been initialized. We must do this even if one operand is a
1504 : constant--see addsi3 in m68k.md. */
1505 272407273 : for (i = 0; i < (int) recog_data.n_operands - 1; i++)
1506 148551024 : if (constraints[i][0] == '%')
1507 : {
1508 : const char *xconstraints[MAX_RECOG_OPERANDS];
1509 : int j;
1510 :
1511 : /* Handle commutative operands by swapping the
1512 : constraints. We assume the modes are the same. */
1513 68342606 : for (j = 0; j < recog_data.n_operands; j++)
1514 51467282 : xconstraints[j] = constraints[j];
1515 :
1516 16875324 : xconstraints[i] = constraints[i+1];
1517 16875324 : xconstraints[i+1] = constraints[i];
1518 16875324 : record_reg_classes (recog_data.n_alternatives, recog_data.n_operands,
1519 : recog_data.operand, modes,
1520 : xconstraints, insn, pref);
1521 : }
1522 123856249 : record_reg_classes (recog_data.n_alternatives, recog_data.n_operands,
1523 : recog_data.operand, modes,
1524 : constraints, insn, pref);
1525 : }
1526 :
1527 :
1528 :
1529 : /* Process one insn INSN. Scan it and record each time it would save
1530 : code to put a certain allocnos in a certain class. Return the last
1531 : insn processed, so that the scan can be continued from there. */
1532 : static rtx_insn *
1533 292346369 : scan_one_insn (rtx_insn *insn)
1534 : {
1535 292346369 : enum rtx_code pat_code;
1536 292346369 : rtx set, note;
1537 292346369 : int i, k;
1538 292346369 : bool counted_mem;
1539 :
1540 292346369 : if (!NONDEBUG_INSN_P (insn))
1541 : return insn;
1542 :
1543 143174731 : pat_code = GET_CODE (PATTERN (insn));
1544 143174731 : if (pat_code == ASM_INPUT)
1545 : return insn;
1546 :
1547 : /* If INSN is a USE/CLOBBER of a pseudo in a mode M then go ahead
1548 : and initialize the register move costs of mode M.
1549 :
1550 : The pseudo may be related to another pseudo via a copy (implicit or
1551 : explicit) and if there are no mode M uses/sets of the original
1552 : pseudo, then we may leave the register move costs uninitialized for
1553 : mode M. */
1554 143170893 : if (pat_code == USE || pat_code == CLOBBER)
1555 : {
1556 1398498 : rtx x = XEXP (PATTERN (insn), 0);
1557 1398498 : if (GET_CODE (x) == REG
1558 1385095 : && REGNO (x) >= FIRST_PSEUDO_REGISTER
1559 1431827 : && have_regs_of_mode[GET_MODE (x)])
1560 33328 : ira_init_register_move_cost_if_necessary (GET_MODE (x));
1561 1398498 : return insn;
1562 : }
1563 :
1564 141772395 : counted_mem = false;
1565 141772395 : set = single_set (insn);
1566 141772395 : extract_insn (insn);
1567 :
1568 : /* If this insn loads a parameter from its stack slot, then it
1569 : represents a savings, rather than a cost, if the parameter is
1570 : stored in memory. Record this fact.
1571 :
1572 : Similarly if we're loading other constants from memory (constant
1573 : pool, TOC references, small data areas, etc) and this is the only
1574 : assignment to the destination pseudo.
1575 :
1576 : Don't do this if SET_SRC (set) isn't a general operand, if it is
1577 : a memory requiring special instructions to load it, decreasing
1578 : mem_cost might result in it being loaded using the specialized
1579 : instruction into a register, then stored into stack and loaded
1580 : again from the stack. See PR52208.
1581 :
1582 : Don't do this if SET_SRC (set) has side effect. See PR56124. */
1583 134033728 : if (set != 0 && REG_P (SET_DEST (set)) && MEM_P (SET_SRC (set))
1584 17314956 : && (note = find_reg_note (insn, REG_EQUIV, NULL_RTX)) != NULL_RTX
1585 4811442 : && ((MEM_P (XEXP (note, 0))
1586 4354312 : && !side_effects_p (SET_SRC (set)))
1587 457130 : || (CONSTANT_P (XEXP (note, 0))
1588 457122 : && targetm.legitimate_constant_p (GET_MODE (SET_DEST (set)),
1589 : XEXP (note, 0))
1590 156431 : && REG_N_SETS (REGNO (SET_DEST (set))) == 1))
1591 4510743 : && general_operand (SET_SRC (set), GET_MODE (SET_SRC (set)))
1592 : /* LRA does not use equiv with a symbol for PIC code. */
1593 146283093 : && (! ira_use_lra_p || ! pic_offset_table_rtx
1594 334454 : || ! contains_symbol_ref_p (XEXP (note, 0))))
1595 : {
1596 4453106 : enum reg_class cl = GENERAL_REGS;
1597 4453106 : rtx reg = SET_DEST (set);
1598 4453106 : int num = COST_INDEX (REGNO (reg));
1599 : /* Costs for NO_REGS are used in cost calculation on the
1600 : 1st pass when the preferred register classes are not
1601 : known yet. In this case we take the best scenario when
1602 : mode can't be put into GENERAL_REGS. */
1603 4453106 : if (!targetm.hard_regno_mode_ok (ira_class_hard_regs[cl][0],
1604 4453106 : GET_MODE (reg)))
1605 1156966 : cl = NO_REGS;
1606 :
1607 4453106 : COSTS (costs, num)->mem_cost
1608 4453106 : -= ira_memory_move_cost[GET_MODE (reg)][cl][1] * frequency;
1609 8906212 : record_address_regs (GET_MODE (SET_SRC (set)),
1610 8906212 : MEM_ADDR_SPACE (SET_SRC (set)),
1611 4453106 : XEXP (SET_SRC (set), 0), 0, MEM, SCRATCH,
1612 : frequency * 2);
1613 4453106 : counted_mem = true;
1614 : }
1615 :
1616 141772395 : record_operand_costs (insn, pref);
1617 :
1618 141772395 : if (ira_dump_file != NULL && internal_flag_ira_verbose > 5)
1619 : {
1620 0 : const char *p;
1621 0 : fprintf (ira_dump_file, " Final costs after insn %u", INSN_UID (insn));
1622 0 : if (INSN_CODE (insn) >= 0
1623 0 : && (p = get_insn_name (INSN_CODE (insn))) != NULL)
1624 0 : fprintf (ira_dump_file, " {%s}", p);
1625 0 : fprintf (ira_dump_file, " (freq=%d)\n",
1626 0 : REG_FREQ_FROM_BB (BLOCK_FOR_INSN (insn)));
1627 0 : dump_insn_slim (ira_dump_file, insn);
1628 : }
1629 :
1630 : /* Now add the cost for each operand to the total costs for its
1631 : allocno. */
1632 449091682 : for (i = 0; i < recog_data.n_operands; i++)
1633 : {
1634 307319287 : rtx op = recog_data.operand[i];
1635 :
1636 307319287 : if (GET_CODE (op) == SUBREG)
1637 63432 : op = SUBREG_REG (op);
1638 307319287 : if (REG_P (op) && REGNO (op) >= FIRST_PSEUDO_REGISTER)
1639 : {
1640 125143413 : int regno = REGNO (op);
1641 125143413 : struct costs *p = COSTS (costs, COST_INDEX (regno));
1642 125143413 : struct costs *q = op_costs[i];
1643 125143413 : int *p_costs = p->cost, *q_costs = q->cost;
1644 125143413 : cost_classes_t cost_classes_ptr = regno_cost_classes[regno];
1645 125143413 : int add_cost = 0;
1646 :
1647 : /* If the already accounted for the memory "cost" above, don't
1648 : do so again. */
1649 125143413 : if (!counted_mem)
1650 : {
1651 120690307 : add_cost = q->mem_cost;
1652 120690307 : if (add_cost > 0 && INT_MAX - add_cost < p->mem_cost)
1653 0 : p->mem_cost = INT_MAX;
1654 : else
1655 120690307 : p->mem_cost += add_cost;
1656 : }
1657 125143413 : if (ira_dump_file != NULL && internal_flag_ira_verbose > 5)
1658 : {
1659 0 : fprintf (ira_dump_file, " op %d(r=%u) MEM:%d(+%d)",
1660 : i, REGNO(op), p->mem_cost, add_cost);
1661 : }
1662 1859002501 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
1663 : {
1664 1733859088 : add_cost = q_costs[k];
1665 1733859088 : if (add_cost > 0 && INT_MAX - add_cost < p_costs[k])
1666 0 : p_costs[k] = INT_MAX;
1667 : else
1668 1733859088 : p_costs[k] += add_cost;
1669 1733859088 : if (ira_dump_file != NULL && internal_flag_ira_verbose > 5)
1670 : {
1671 0 : fprintf (ira_dump_file, " %s:%d(+%d)",
1672 0 : reg_class_names[cost_classes_ptr->classes[k]],
1673 0 : p_costs[k], add_cost);
1674 : }
1675 : }
1676 125143413 : if (ira_dump_file != NULL && internal_flag_ira_verbose > 5)
1677 0 : fprintf (ira_dump_file, "\n");
1678 : }
1679 : }
1680 : return insn;
1681 : }
1682 :
1683 :
1684 :
1685 : /* Print allocnos costs to the dump file. */
1686 : static void
1687 127 : print_allocno_costs (void)
1688 : {
1689 127 : int k;
1690 127 : ira_allocno_t a;
1691 127 : ira_allocno_iterator ai;
1692 :
1693 127 : ira_assert (allocno_p);
1694 127 : fprintf (ira_dump_file, "\n");
1695 1341 : FOR_EACH_ALLOCNO (a, ai)
1696 : {
1697 1214 : int i, rclass;
1698 1214 : basic_block bb;
1699 1214 : int regno = ALLOCNO_REGNO (a);
1700 1214 : cost_classes_t cost_classes_ptr = regno_cost_classes[regno];
1701 1214 : enum reg_class *cost_classes = cost_classes_ptr->classes;
1702 :
1703 1214 : i = ALLOCNO_NUM (a);
1704 1214 : fprintf (ira_dump_file, " a%d(r%d,", i, regno);
1705 1214 : if ((bb = ALLOCNO_LOOP_TREE_NODE (a)->bb) != NULL)
1706 0 : fprintf (ira_dump_file, "b%d", bb->index);
1707 : else
1708 1214 : fprintf (ira_dump_file, "l%d", ALLOCNO_LOOP_TREE_NODE (a)->loop_num);
1709 1214 : fprintf (ira_dump_file, ") costs:");
1710 19725 : for (k = 0; k < cost_classes_ptr->num; k++)
1711 : {
1712 17297 : rclass = cost_classes[k];
1713 17297 : fprintf (ira_dump_file, " %s:%d", reg_class_names[rclass],
1714 17297 : COSTS (costs, i)->cost[k]);
1715 17297 : if (flag_ira_region == IRA_REGION_ALL
1716 17297 : || flag_ira_region == IRA_REGION_MIXED)
1717 13698 : fprintf (ira_dump_file, ",%d",
1718 13698 : COSTS (total_allocno_costs, i)->cost[k]);
1719 : }
1720 1214 : fprintf (ira_dump_file, " MEM:%i", COSTS (costs, i)->mem_cost);
1721 1214 : if (flag_ira_region == IRA_REGION_ALL
1722 1214 : || flag_ira_region == IRA_REGION_MIXED)
1723 1004 : fprintf (ira_dump_file, ",%d",
1724 1004 : COSTS (total_allocno_costs, i)->mem_cost);
1725 1214 : fprintf (ira_dump_file, "\n");
1726 : }
1727 127 : }
1728 :
1729 : /* Print pseudo costs to the dump file. */
1730 : static void
1731 16 : print_pseudo_costs (void)
1732 : {
1733 16 : int regno, k;
1734 16 : int rclass;
1735 16 : cost_classes_t cost_classes_ptr;
1736 16 : enum reg_class *cost_classes;
1737 :
1738 16 : ira_assert (! allocno_p);
1739 16 : fprintf (ira_dump_file, "\n");
1740 764 : for (regno = max_reg_num () - 1; regno >= FIRST_PSEUDO_REGISTER; regno--)
1741 : {
1742 748 : if (REG_N_REFS (regno) <= 0)
1743 444 : continue;
1744 304 : cost_classes_ptr = regno_cost_classes[regno];
1745 304 : cost_classes = cost_classes_ptr->classes;
1746 304 : fprintf (ira_dump_file, " r%d costs:", regno);
1747 5904 : for (k = 0; k < cost_classes_ptr->num; k++)
1748 : {
1749 5296 : rclass = cost_classes[k];
1750 5296 : fprintf (ira_dump_file, " %s:%d", reg_class_names[rclass],
1751 5296 : COSTS (costs, regno)->cost[k]);
1752 : }
1753 304 : fprintf (ira_dump_file, " MEM:%i\n", COSTS (costs, regno)->mem_cost);
1754 : }
1755 16 : }
1756 :
1757 : /* Traverse the BB represented by LOOP_TREE_NODE to update the allocno
1758 : costs. */
1759 : static void
1760 25623900 : process_bb_for_costs (basic_block bb)
1761 : {
1762 25623900 : rtx_insn *insn;
1763 :
1764 25623900 : frequency = REG_FREQ_FROM_BB (bb);
1765 25623900 : if (frequency == 0)
1766 0 : frequency = 1;
1767 317970269 : FOR_BB_INSNS (bb, insn)
1768 292346369 : insn = scan_one_insn (insn);
1769 25623900 : }
1770 :
1771 : /* Traverse the BB represented by LOOP_TREE_NODE to update the allocno
1772 : costs. */
1773 : static void
1774 28576541 : process_bb_node_for_costs (ira_loop_tree_node_t loop_tree_node)
1775 : {
1776 28576541 : basic_block bb;
1777 :
1778 28576541 : bb = loop_tree_node->bb;
1779 28576541 : if (bb != NULL)
1780 24941516 : process_bb_for_costs (bb);
1781 28576541 : }
1782 :
1783 : /* Return true if all autoinc rtx in X change only a register and memory is
1784 : valid. */
1785 : static bool
1786 53503294 : validate_autoinc_and_mem_addr_p (rtx x)
1787 : {
1788 53503294 : enum rtx_code code = GET_CODE (x);
1789 53503294 : if (GET_RTX_CLASS (code) == RTX_AUTOINC)
1790 384339 : return REG_P (XEXP (x, 0));
1791 53118955 : const char *fmt = GET_RTX_FORMAT (code);
1792 131727517 : for (int i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
1793 79954785 : if (fmt[i] == 'e')
1794 : {
1795 43536327 : if (!validate_autoinc_and_mem_addr_p (XEXP (x, i)))
1796 : return false;
1797 : }
1798 36418458 : else if (fmt[i] == 'E')
1799 : {
1800 3005134 : for (int j = 0; j < XVECLEN (x, i); j++)
1801 2034903 : if (!validate_autoinc_and_mem_addr_p (XVECEXP (x, i, j)))
1802 : return false;
1803 : }
1804 : /* Check memory after checking autoinc to guarantee that autoinc is already
1805 : valid for machine-dependent code checking memory address. */
1806 51772732 : return (!MEM_P (x)
1807 110522479 : || memory_address_addr_space_p (GET_MODE (x), XEXP (x, 0),
1808 8115665 : MEM_ADDR_SPACE (x)));
1809 : }
1810 :
1811 : /* Check that reg REGNO in INSN can be changed by TO (which is an invariant
1812 : equiv when INVARIANT_P is true). Return true in case the result insn would
1813 : be valid one. */
1814 : static bool
1815 7932064 : equiv_can_be_consumed_p (int regno, rtx to, rtx_insn *insn, bool invariant_p)
1816 : {
1817 7932064 : validate_replace_src_group (regno_reg_rtx[regno], to, insn);
1818 : /* We can change register to equivalent memory in autoinc rtl. Some code
1819 : including verify_changes assumes that autoinc contains only a register.
1820 : So check this first. */
1821 7932064 : bool res = validate_autoinc_and_mem_addr_p (PATTERN (insn));
1822 7932064 : if (res)
1823 6793414 : res = verify_changes (0);
1824 7932064 : cancel_changes (0);
1825 7932064 : if (!res && invariant_p)
1826 : {
1827 : /* Here we use more expensive code for the invariant because we need to
1828 : simplify the result insn as the invariant can be arithmetic rtx
1829 : inserted into another arithmetic rtx, e.g. into memory address. */
1830 594897 : rtx pat = PATTERN (insn);
1831 594897 : int code = INSN_CODE (insn);
1832 594897 : PATTERN (insn) = copy_rtx (pat);
1833 1189794 : PATTERN (insn)
1834 594897 : = simplify_replace_rtx (PATTERN (insn), regno_reg_rtx[regno], to);
1835 594897 : res = !insn_invalid_p (insn, false);
1836 594897 : PATTERN (insn) = pat;
1837 594897 : INSN_CODE (insn) = code;
1838 : }
1839 7932064 : return res;
1840 : }
1841 :
1842 : /* Return true if X contains a pseudo with equivalence. In this case also
1843 : return the pseudo through parameter REG. If the pseudo is a part of subreg,
1844 : return the subreg through parameter SUBREG. */
1845 :
1846 : static bool
1847 277419120 : get_equiv_regno (rtx x, int ®no, rtx &subreg)
1848 : {
1849 277419120 : subreg = NULL_RTX;
1850 277419120 : if (GET_CODE (x) == SUBREG)
1851 : {
1852 2240301 : subreg = x;
1853 2240301 : x = SUBREG_REG (x);
1854 : }
1855 277419120 : if (REG_P (x)
1856 277419120 : && (ira_reg_equiv[REGNO (x)].memory != NULL
1857 83198219 : || ira_reg_equiv[REGNO (x)].invariant != NULL
1858 80763976 : || ira_reg_equiv[REGNO (x)].constant != NULL))
1859 : {
1860 10417696 : regno = REGNO (x);
1861 10417696 : return true;
1862 : }
1863 267001424 : RTX_CODE code = GET_CODE (x);
1864 267001424 : const char *fmt = GET_RTX_FORMAT (code);
1865 :
1866 623942262 : for (int i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
1867 372327911 : if (fmt[i] == 'e')
1868 : {
1869 205440315 : if (get_equiv_regno (XEXP (x, i), regno, subreg))
1870 : return true;
1871 : }
1872 166887596 : else if (fmt[i] == 'E')
1873 : {
1874 24089848 : for (int j = 0; j < XVECLEN (x, i); j++)
1875 16777928 : if (get_equiv_regno (XVECEXP (x, i, j), regno, subreg))
1876 : return true;
1877 : }
1878 : return false;
1879 : }
1880 :
1881 : /* A pass through the current function insns. Calculate costs of using
1882 : equivalences for pseudos and store them in regno_equiv_gains. */
1883 :
1884 : static void
1885 969970 : calculate_equiv_gains (void)
1886 : {
1887 969970 : basic_block bb;
1888 969970 : int regno, freq, cost;
1889 969970 : rtx subreg;
1890 969970 : rtx_insn *insn;
1891 969970 : machine_mode mode;
1892 969970 : enum reg_class rclass;
1893 969970 : bitmap_head equiv_pseudos;
1894 :
1895 969970 : ira_assert (allocno_p);
1896 969970 : bitmap_initialize (&equiv_pseudos, ®_obstack);
1897 48768992 : for (regno = max_reg_num () - 1; regno >= FIRST_PSEUDO_REGISTER; regno--)
1898 47799022 : if (ira_reg_equiv[regno].init_insns != NULL
1899 4208089 : && (ira_reg_equiv[regno].memory != NULL
1900 1490183 : || ira_reg_equiv[regno].invariant != NULL
1901 657223 : || (ira_reg_equiv[regno].constant != NULL
1902 : /* Ignore complicated constants which probably will be placed
1903 : in memory: */
1904 657223 : && GET_CODE (ira_reg_equiv[regno].constant) != CONST_DOUBLE
1905 : && GET_CODE (ira_reg_equiv[regno].constant) != CONST_VECTOR
1906 : && GET_CODE (ira_reg_equiv[regno].constant) != LABEL_REF)))
1907 : {
1908 : rtx_insn_list *x;
1909 7566825 : for (x = ira_reg_equiv[regno].init_insns; x != NULL; x = x->next ())
1910 : {
1911 4038358 : insn = x->insn ();
1912 4038358 : rtx set = single_set (insn);
1913 :
1914 4038358 : if (set == NULL_RTX || SET_DEST (set) != regno_reg_rtx[regno])
1915 : break;
1916 3528467 : bb = BLOCK_FOR_INSN (insn);
1917 3528467 : ira_curr_regno_allocno_map
1918 3528467 : = ira_bb_nodes[bb->index].parent->regno_allocno_map;
1919 3528467 : mode = PSEUDO_REGNO_MODE (regno);
1920 3528467 : rclass = pref[COST_INDEX (regno)];
1921 3528467 : ira_init_register_move_cost_if_necessary (mode);
1922 3528467 : if (ira_reg_equiv[regno].memory != NULL)
1923 2208015 : cost = ira_memory_move_cost[mode][rclass][1];
1924 : else
1925 1320452 : cost = ira_register_move_cost[mode][rclass][rclass];
1926 3528467 : freq = REG_FREQ_FROM_BB (bb);
1927 3528467 : regno_equiv_gains[regno] += cost * freq;
1928 : }
1929 4038358 : if (x != NULL)
1930 : /* We found complicated equiv or reverse equiv mem=reg. Ignore
1931 : them. */
1932 509891 : regno_equiv_gains[regno] = 0;
1933 : else
1934 3528467 : bitmap_set_bit (&equiv_pseudos, regno);
1935 : }
1936 :
1937 11407636 : FOR_EACH_BB_FN (bb, cfun)
1938 : {
1939 10437666 : freq = REG_FREQ_FROM_BB (bb);
1940 10437666 : ira_curr_regno_allocno_map
1941 10437666 : = ira_bb_nodes[bb->index].parent->regno_allocno_map;
1942 136186457 : FOR_BB_INSNS (bb, insn)
1943 : {
1944 242732639 : if (!NONDEBUG_INSN_P (insn)
1945 55200877 : || !get_equiv_regno (PATTERN (insn), regno, subreg)
1946 136166487 : || !bitmap_bit_p (&equiv_pseudos, regno))
1947 116983848 : continue;
1948 :
1949 8764943 : if (ira_reg_equiv[regno].invariant != NULL)
1950 : {
1951 2434243 : rtx_insn_list *x = ira_reg_equiv[regno].init_insns;
1952 4035607 : for (; x != NULL; x = x->next ())
1953 2434243 : if (insn == x->insn ())
1954 : break;
1955 2434243 : if (x != NULL)
1956 832879 : continue; /* skip equiv init insn for invariant */
1957 : }
1958 :
1959 7932064 : rtx subst = ira_reg_equiv[regno].memory;
1960 :
1961 7932064 : if (subst == NULL)
1962 2681392 : subst = ira_reg_equiv[regno].constant;
1963 2681392 : if (subst == NULL)
1964 1601364 : subst = ira_reg_equiv[regno].invariant;
1965 1601364 : ira_assert (subst != NULL);
1966 7932064 : mode = PSEUDO_REGNO_MODE (regno);
1967 7932064 : ira_init_register_move_cost_if_necessary (mode);
1968 7932064 : bool consumed_p
1969 15864128 : = equiv_can_be_consumed_p (regno, subst, insn,
1970 7932064 : subst == ira_reg_equiv[regno].invariant);
1971 :
1972 7932064 : rclass = pref[COST_INDEX (regno)];
1973 7932064 : if (MEM_P (subst)
1974 : /* If it is a change of constant into double for example, the
1975 : result constant probably will be placed in memory. */
1976 2681392 : || (ira_reg_equiv[regno].invariant == NULL
1977 1080028 : && subreg != NULL_RTX
1978 1236 : && !INTEGRAL_MODE_P (GET_MODE (subreg))))
1979 7876961 : cost = ira_memory_move_cost[mode][rclass][1] + (consumed_p ? 0 : 1);
1980 2681329 : else if (consumed_p)
1981 1595267 : continue;
1982 : else
1983 1086062 : cost = ira_register_move_cost[mode][rclass][rclass];
1984 6336797 : regno_equiv_gains[regno] -= cost * freq;
1985 : }
1986 : }
1987 969970 : bitmap_clear (&equiv_pseudos);
1988 969970 : }
1989 :
1990 : /* Find costs of register classes and memory for allocnos or pseudos
1991 : and their best costs. Set up preferred, alternative and allocno
1992 : classes for pseudos. */
1993 : static void
1994 1523827 : find_costs_and_classes (void)
1995 : {
1996 1523827 : int i, k, start, max_cost_classes_num;
1997 1523827 : int pass;
1998 1523827 : basic_block bb;
1999 1523827 : enum reg_class *regno_best_class, new_class;
2000 :
2001 1523827 : init_recog ();
2002 1523827 : regno_best_class
2003 1523827 : = (enum reg_class *) ira_allocate (max_reg_num ()
2004 : * sizeof (enum reg_class));
2005 69512709 : for (i = max_reg_num () - 1; i >= FIRST_PSEUDO_REGISTER; i--)
2006 67988882 : regno_best_class[i] = NO_REGS;
2007 3017810 : if (!resize_reg_info () && allocno_p
2008 3017767 : && pseudo_classes_defined_p && flag_expensive_optimizations)
2009 : {
2010 48 : ira_allocno_t a;
2011 48 : ira_allocno_iterator ai;
2012 :
2013 48 : pref = pref_buffer;
2014 48 : max_cost_classes_num = 1;
2015 1637 : FOR_EACH_ALLOCNO (a, ai)
2016 : {
2017 1589 : pref[ALLOCNO_NUM (a)] = reg_preferred_class (ALLOCNO_REGNO (a));
2018 1589 : setup_regno_cost_classes_by_aclass
2019 1589 : (ALLOCNO_REGNO (a), pref[ALLOCNO_NUM (a)]);
2020 1589 : max_cost_classes_num
2021 1589 : = MAX (max_cost_classes_num,
2022 : regno_cost_classes[ALLOCNO_REGNO (a)]->num);
2023 : }
2024 48 : start = 1;
2025 : }
2026 : else
2027 : {
2028 1523779 : pref = NULL;
2029 1523779 : max_cost_classes_num = ira_important_classes_num;
2030 69509951 : for (i = max_reg_num () - 1; i >= FIRST_PSEUDO_REGISTER; i--)
2031 67986172 : if (regno_reg_rtx[i] != NULL_RTX)
2032 67682300 : setup_regno_cost_classes_by_mode (i, PSEUDO_REGNO_MODE (i));
2033 : else
2034 303872 : setup_regno_cost_classes_by_aclass (i, ALL_REGS);
2035 : start = 0;
2036 : }
2037 1523827 : if (allocno_p)
2038 : /* Clear the flag for the next compiled function. */
2039 1493940 : pseudo_classes_defined_p = false;
2040 : /* Normally we scan the insns once and determine the best class to
2041 : use for each allocno. However, if -fexpensive-optimizations are
2042 : on, we do so twice, the second time using the tentative best
2043 : classes to guide the selection. */
2044 4047411 : for (pass = start; pass <= flag_expensive_optimizations; pass++)
2045 : {
2046 2523584 : if ((!allocno_p || internal_flag_ira_verbose > 0) && ira_dump_file)
2047 143 : fprintf (ira_dump_file,
2048 : "\nPass %i for finding pseudo/allocno costs\n\n", pass);
2049 :
2050 2523584 : if (pass != start)
2051 : {
2052 999757 : max_cost_classes_num = 1;
2053 50226399 : for (i = max_reg_num () - 1; i >= FIRST_PSEUDO_REGISTER; i--)
2054 : {
2055 49226642 : setup_regno_cost_classes_by_aclass (i, regno_best_class[i]);
2056 49226642 : max_cost_classes_num
2057 49226642 : = MAX (max_cost_classes_num, regno_cost_classes[i]->num);
2058 : }
2059 : }
2060 :
2061 2523584 : struct_costs_size
2062 2523584 : = sizeof (struct costs) + sizeof (int) * (max_cost_classes_num - 1);
2063 : /* Zero out our accumulation of the cost of each class for each
2064 : allocno. */
2065 2523584 : memset (costs, 0, cost_elements_num * struct_costs_size);
2066 :
2067 2523584 : if (allocno_p)
2068 : {
2069 : /* Scan the instructions and record each time it would save code
2070 : to put a certain allocno in a certain class. */
2071 2463862 : ira_traverse_loop_tree (true, ira_loop_tree_root,
2072 : process_bb_node_for_costs, NULL);
2073 :
2074 2463862 : memcpy (total_allocno_costs, costs,
2075 2463862 : max_struct_costs_size * ira_allocnos_num);
2076 : }
2077 : else
2078 : {
2079 59722 : basic_block bb;
2080 :
2081 742106 : FOR_EACH_BB_FN (bb, cfun)
2082 682384 : process_bb_for_costs (bb);
2083 : }
2084 :
2085 2523584 : if (pass == 0)
2086 1523779 : pref = pref_buffer;
2087 :
2088 2523584 : if (ira_use_lra_p && allocno_p && pass == 1)
2089 : /* It is a pass through all insns. So do it once and only for RA (not
2090 : for insn scheduler) when we already found preferable pseudo register
2091 : classes on the previous pass. */
2092 969970 : calculate_equiv_gains ();
2093 :
2094 : /* Now for each allocno look at how desirable each class is and
2095 : find which class is preferred. */
2096 119739108 : for (i = max_reg_num () - 1; i >= FIRST_PSEUDO_REGISTER; i--)
2097 : {
2098 117215524 : ira_allocno_t a, parent_a;
2099 117215524 : int rclass, a_num, parent_a_num, add_cost;
2100 117215524 : ira_loop_tree_node_t parent;
2101 117215524 : int best_cost, allocno_cost;
2102 117215524 : enum reg_class best, alt_class;
2103 117215524 : cost_classes_t cost_classes_ptr = regno_cost_classes[i];
2104 117215524 : enum reg_class *cost_classes;
2105 117215524 : int *i_costs = temp_costs->cost;
2106 117215524 : int i_mem_cost;
2107 117215524 : int equiv_savings = regno_equiv_gains[i];
2108 :
2109 117215524 : if (! allocno_p)
2110 : {
2111 2862265 : if (regno_reg_rtx[i] == NULL_RTX)
2112 4694 : continue;
2113 2857571 : memcpy (temp_costs, COSTS (costs, i), struct_costs_size);
2114 2857571 : i_mem_cost = temp_costs->mem_cost;
2115 2857571 : cost_classes = cost_classes_ptr->classes;
2116 : }
2117 : else
2118 : {
2119 114353259 : if (ira_regno_allocno_map[i] == NULL)
2120 67203400 : continue;
2121 47149859 : memset (temp_costs, 0, struct_costs_size);
2122 47149859 : i_mem_cost = 0;
2123 47149859 : cost_classes = cost_classes_ptr->classes;
2124 : /* Find cost of all allocnos with the same regno. */
2125 47149859 : for (a = ira_regno_allocno_map[i];
2126 104916065 : a != NULL;
2127 57766206 : a = ALLOCNO_NEXT_REGNO_ALLOCNO (a))
2128 : {
2129 57766206 : int *a_costs, *p_costs;
2130 :
2131 57766206 : a_num = ALLOCNO_NUM (a);
2132 57766206 : if ((flag_ira_region == IRA_REGION_ALL
2133 57766206 : || flag_ira_region == IRA_REGION_MIXED)
2134 45126669 : && (parent = ALLOCNO_LOOP_TREE_NODE (a)->parent) != NULL
2135 17396284 : && (parent_a = parent->regno_allocno_map[i]) != NULL
2136 : /* There are no caps yet. */
2137 68382118 : && bitmap_bit_p (ALLOCNO_LOOP_TREE_NODE
2138 10615912 : (a)->border_allocnos,
2139 : ALLOCNO_NUM (a)))
2140 : {
2141 : /* Propagate costs to upper levels in the region
2142 : tree. */
2143 10609676 : parent_a_num = ALLOCNO_NUM (parent_a);
2144 10609676 : a_costs = COSTS (total_allocno_costs, a_num)->cost;
2145 10609676 : p_costs = COSTS (total_allocno_costs, parent_a_num)->cost;
2146 153352113 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
2147 : {
2148 142742437 : add_cost = a_costs[k];
2149 142742437 : if (add_cost > 0 && INT_MAX - add_cost < p_costs[k])
2150 0 : p_costs[k] = INT_MAX;
2151 : else
2152 142742437 : p_costs[k] += add_cost;
2153 : }
2154 10609676 : add_cost = COSTS (total_allocno_costs, a_num)->mem_cost;
2155 10609676 : if (add_cost > 0
2156 5122317 : && (INT_MAX - add_cost
2157 : < COSTS (total_allocno_costs,
2158 5122317 : parent_a_num)->mem_cost))
2159 0 : COSTS (total_allocno_costs, parent_a_num)->mem_cost
2160 0 : = INT_MAX;
2161 : else
2162 10609676 : COSTS (total_allocno_costs, parent_a_num)->mem_cost
2163 10609676 : += add_cost;
2164 :
2165 10609676 : if (i >= first_moveable_pseudo && i < last_moveable_pseudo)
2166 0 : COSTS (total_allocno_costs, parent_a_num)->mem_cost = 0;
2167 : }
2168 57766206 : a_costs = COSTS (costs, a_num)->cost;
2169 858505211 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
2170 : {
2171 800739005 : add_cost = a_costs[k];
2172 800739005 : if (add_cost > 0 && INT_MAX - add_cost < i_costs[k])
2173 0 : i_costs[k] = INT_MAX;
2174 : else
2175 800739005 : i_costs[k] += add_cost;
2176 : }
2177 57766206 : add_cost = COSTS (costs, a_num)->mem_cost;
2178 57766206 : if (add_cost > 0 && INT_MAX - add_cost < i_mem_cost)
2179 : i_mem_cost = INT_MAX;
2180 : else
2181 57766206 : i_mem_cost += add_cost;
2182 : }
2183 : }
2184 50007430 : if (i >= first_moveable_pseudo && i < last_moveable_pseudo)
2185 : i_mem_cost = 0;
2186 49980953 : else if (ira_use_lra_p)
2187 : {
2188 49980953 : rtx x;
2189 49980953 : if (equiv_savings > 0
2190 : /* During LRA constraint pass, some equivalences are
2191 : invalidated. Align IRA with LRA here and do not consider
2192 : those equivalences since otherwise those pseudos are
2193 : spilled. */
2194 49980953 : && (!pic_offset_table_rtx
2195 6361 : || (x = ira_reg_equiv[i].constant) == NULL
2196 766 : || ((!CONST_POOL_OK_P (PSEUDO_REGNO_MODE (i), x)
2197 766 : || targetm.preferred_reload_class
2198 766 : (x, reg_allocno_class (i)) != NO_REGS)
2199 766 : && !contains_symbol_ref_p (x))))
2200 : {
2201 535812 : i_mem_cost = 0;
2202 535812 : if (ira_dump_file != NULL && internal_flag_ira_verbose > 5)
2203 0 : fprintf (ira_dump_file,
2204 : " Use MEM for r%d as the equiv savings is %d\n",
2205 : i, equiv_savings);
2206 : }
2207 : }
2208 0 : else if (equiv_savings < 0)
2209 0 : i_mem_cost = -equiv_savings;
2210 0 : else if (equiv_savings > 0)
2211 : {
2212 0 : i_mem_cost = 0;
2213 0 : for (k = cost_classes_ptr->num - 1; k >= 0; k--)
2214 0 : i_costs[k] += equiv_savings;
2215 : }
2216 :
2217 50007430 : best_cost = (1 << (HOST_BITS_PER_INT - 2)) - 1;
2218 50007430 : best = ALL_REGS;
2219 50007430 : alt_class = NO_REGS;
2220 : /* Find best common class for all allocnos with the same
2221 : regno. */
2222 756833697 : for (k = 0; k < cost_classes_ptr->num; k++)
2223 : {
2224 706826267 : rclass = cost_classes[k];
2225 706826267 : if (i_costs[k] < best_cost)
2226 : {
2227 : best_cost = i_costs[k];
2228 : best = (enum reg_class) rclass;
2229 : }
2230 645408468 : else if (i_costs[k] == best_cost)
2231 306321648 : best = ira_reg_class_subunion[best][rclass];
2232 706826267 : if (pass == flag_expensive_optimizations
2233 : /* We still prefer registers to memory even at this
2234 : stage if their costs are the same. We will make
2235 : a final decision during assigning hard registers
2236 : when we have all info including more accurate
2237 : costs which might be affected by assigning hard
2238 : registers to other pseudos because the pseudos
2239 : involved in moves can be coalesced. */
2240 404186554 : && i_costs[k] <= i_mem_cost
2241 278897462 : && (reg_class_size[reg_class_subunion[alt_class][rclass]]
2242 278897462 : > reg_class_size[alt_class]))
2243 706826267 : alt_class = reg_class_subunion[alt_class][rclass];
2244 : }
2245 50007430 : alt_class = ira_allocno_class_translate[alt_class];
2246 50007430 : if (best_cost > i_mem_cost
2247 50007430 : && ! non_spilled_static_chain_regno_p (i))
2248 769584 : regno_aclass[i] = NO_REGS;
2249 49237846 : else if (!optimize && !targetm.class_likely_spilled_p (best))
2250 : /* Registers in the alternative class are likely to need
2251 : longer or slower sequences than registers in the best class.
2252 : When optimizing we make some effort to use the best class
2253 : over the alternative class where possible, but at -O0 we
2254 : effectively give the alternative class equal weight.
2255 : We then run the risk of using slower alternative registers
2256 : when plenty of registers from the best class are still free.
2257 : This is especially true because live ranges tend to be very
2258 : short in -O0 code and so register pressure tends to be low.
2259 :
2260 : Avoid that by ignoring the alternative class if the best
2261 : class has plenty of registers.
2262 :
2263 : The union class arrays give important classes and only
2264 : part of it are allocno classes. So translate them into
2265 : allocno classes. */
2266 9609809 : regno_aclass[i] = ira_allocno_class_translate[best];
2267 : else
2268 : {
2269 : /* Make the common class the biggest class of best and
2270 : alt_class. Translate the common class into an
2271 : allocno class too. */
2272 39628037 : regno_aclass[i] = (ira_allocno_class_translate
2273 39628037 : [ira_reg_class_superunion[best][alt_class]]);
2274 39628037 : ira_assert (regno_aclass[i] != NO_REGS
2275 : && ira_reg_allocno_class_p[regno_aclass[i]]);
2276 : }
2277 50007430 : if (pic_offset_table_rtx != NULL
2278 50007430 : && i == (int) REGNO (pic_offset_table_rtx))
2279 : {
2280 : /* For some targets, integer pseudos can be assigned to fp
2281 : regs. As we don't want reload pic offset table pseudo, we
2282 : should avoid using non-integer regs. */
2283 82303 : regno_aclass[i]
2284 82303 : = ira_reg_class_intersect[regno_aclass[i]][GENERAL_REGS];
2285 82303 : alt_class = ira_reg_class_intersect[alt_class][GENERAL_REGS];
2286 : }
2287 100014860 : if ((new_class
2288 100014860 : = (reg_class) (targetm.ira_change_pseudo_allocno_class
2289 50007430 : (i, regno_aclass[i], best))) != regno_aclass[i])
2290 : {
2291 0 : regno_aclass[i] = new_class;
2292 0 : if (hard_reg_set_subset_p (reg_class_contents[new_class],
2293 0 : reg_class_contents[best]))
2294 0 : best = new_class;
2295 0 : if (hard_reg_set_subset_p (reg_class_contents[new_class],
2296 0 : reg_class_contents[alt_class]))
2297 0 : alt_class = new_class;
2298 : }
2299 50007430 : if (pass == flag_expensive_optimizations)
2300 : {
2301 31434013 : if (best_cost > i_mem_cost
2302 : /* Do not assign NO_REGS to static chain pointer
2303 : pseudo when non-local goto is used. */
2304 31434013 : && ! non_spilled_static_chain_regno_p (i))
2305 : best = alt_class = NO_REGS;
2306 30947691 : else if (best == alt_class)
2307 21805131 : alt_class = NO_REGS;
2308 31434013 : setup_reg_classes (i, best, alt_class, regno_aclass[i]);
2309 31434013 : if ((!allocno_p || internal_flag_ira_verbose > 2)
2310 31434013 : && ira_dump_file != NULL)
2311 969 : fprintf (ira_dump_file,
2312 : " r%d: preferred %s, alternative %s, allocno %s\n",
2313 969 : i, reg_class_names[best], reg_class_names[alt_class],
2314 969 : reg_class_names[regno_aclass[i]]);
2315 : }
2316 50007430 : regno_best_class[i] = best;
2317 50007430 : if (! allocno_p)
2318 : {
2319 5715142 : pref[i] = (best_cost > i_mem_cost
2320 2853 : && ! non_spilled_static_chain_regno_p (i)
2321 2857571 : ? NO_REGS : best);
2322 2857571 : continue;
2323 : }
2324 47149859 : for (a = ira_regno_allocno_map[i];
2325 104916065 : a != NULL;
2326 57766206 : a = ALLOCNO_NEXT_REGNO_ALLOCNO (a))
2327 : {
2328 57766206 : enum reg_class aclass = regno_aclass[i];
2329 57766206 : int a_num = ALLOCNO_NUM (a);
2330 57766206 : int *total_a_costs = COSTS (total_allocno_costs, a_num)->cost;
2331 57766206 : int *a_costs = COSTS (costs, a_num)->cost;
2332 :
2333 57766206 : if (aclass == NO_REGS)
2334 : best = NO_REGS;
2335 : else
2336 : {
2337 : /* Finding best class which is subset of the common
2338 : class. */
2339 : best_cost = (1 << (HOST_BITS_PER_INT - 2)) - 1;
2340 : allocno_cost = best_cost;
2341 : best = ALL_REGS;
2342 844877764 : for (k = 0; k < cost_classes_ptr->num; k++)
2343 : {
2344 788097824 : rclass = cost_classes[k];
2345 788097824 : if (! ira_class_subset_p[rclass][aclass])
2346 377914871 : continue;
2347 410182953 : if (total_a_costs[k] < best_cost)
2348 : {
2349 61570893 : best_cost = total_a_costs[k];
2350 61570893 : allocno_cost = a_costs[k];
2351 61570893 : best = (enum reg_class) rclass;
2352 : }
2353 348612060 : else if (total_a_costs[k] == best_cost)
2354 : {
2355 285783304 : best = ira_reg_class_subunion[best][rclass];
2356 285783304 : allocno_cost = MAX (allocno_cost, a_costs[k]);
2357 : }
2358 : }
2359 56779940 : ALLOCNO_CLASS_COST (a) = allocno_cost;
2360 : }
2361 57766206 : if (internal_flag_ira_verbose > 2 && ira_dump_file != NULL
2362 1214 : && (pass == 0 || pref[a_num] != best))
2363 : {
2364 777 : fprintf (ira_dump_file, " a%d (r%d,", a_num, i);
2365 777 : if ((bb = ALLOCNO_LOOP_TREE_NODE (a)->bb) != NULL)
2366 0 : fprintf (ira_dump_file, "b%d", bb->index);
2367 : else
2368 777 : fprintf (ira_dump_file, "l%d",
2369 : ALLOCNO_LOOP_TREE_NODE (a)->loop_num);
2370 777 : fprintf (ira_dump_file, ") best %s, allocno %s\n",
2371 777 : reg_class_names[best],
2372 777 : reg_class_names[aclass]);
2373 : }
2374 57766206 : pref[a_num] = best;
2375 57766206 : if (pass == flag_expensive_optimizations && best != aclass
2376 7598013 : && ira_class_hard_regs_num[best] > 0
2377 7598013 : && (ira_reg_class_max_nregs[best][ALLOCNO_MODE (a)]
2378 : >= ira_class_hard_regs_num[best]))
2379 : {
2380 6870780 : int ind = cost_classes_ptr->index[aclass];
2381 :
2382 6870780 : ira_assert (ind >= 0);
2383 6870780 : ira_init_register_move_cost_if_necessary (ALLOCNO_MODE (a));
2384 6870780 : ira_add_allocno_pref (a, ira_class_hard_regs[best][0],
2385 6870780 : (a_costs[ind] - ALLOCNO_CLASS_COST (a))
2386 : / (ira_register_move_cost
2387 6870780 : [ALLOCNO_MODE (a)][best][aclass]));
2388 136198037 : for (k = 0; k < cost_classes_ptr->num; k++)
2389 122456477 : if (ira_class_subset_p[cost_classes[k]][best])
2390 6870780 : a_costs[k] = a_costs[ind];
2391 : }
2392 : }
2393 : }
2394 :
2395 2523584 : if (internal_flag_ira_verbose > 4 && ira_dump_file)
2396 : {
2397 143 : if (allocno_p)
2398 127 : print_allocno_costs ();
2399 : else
2400 16 : print_pseudo_costs ();
2401 143 : fprintf (ira_dump_file,"\n");
2402 : }
2403 : }
2404 1523827 : ira_free (regno_best_class);
2405 1523827 : }
2406 :
2407 :
2408 :
2409 : /* Process moves involving hard regs to modify allocno hard register
2410 : costs. We can do this only after determining allocno class. If a
2411 : hard register forms a register class, then moves with the hard
2412 : register are already taken into account in class costs for the
2413 : allocno. */
2414 : static void
2415 12686463 : process_bb_node_for_hard_reg_moves (ira_loop_tree_node_t loop_tree_node)
2416 : {
2417 12686463 : int i, freq, src_regno, dst_regno, hard_regno, a_regno;
2418 12686463 : bool to_p;
2419 12686463 : ira_allocno_t a, curr_a;
2420 12686463 : ira_loop_tree_node_t curr_loop_tree_node;
2421 12686463 : enum reg_class rclass;
2422 12686463 : basic_block bb;
2423 12686463 : rtx_insn *insn;
2424 12686463 : rtx set, src, dst;
2425 :
2426 12686463 : bb = loop_tree_node->bb;
2427 12686463 : if (bb == NULL)
2428 : return;
2429 11027937 : freq = REG_FREQ_FROM_BB (bb);
2430 8621646 : if (freq == 0)
2431 2035886 : freq = 1;
2432 141927625 : FOR_BB_INSNS (bb, insn)
2433 : {
2434 130899688 : if (!NONDEBUG_INSN_P (insn))
2435 71887578 : continue;
2436 59012110 : set = single_set (insn);
2437 59012110 : if (set == NULL_RTX)
2438 3901635 : continue;
2439 55110475 : dst = SET_DEST (set);
2440 55110475 : src = SET_SRC (set);
2441 55110475 : if (! REG_P (dst) || ! REG_P (src))
2442 45934756 : continue;
2443 9175719 : dst_regno = REGNO (dst);
2444 9175719 : src_regno = REGNO (src);
2445 9175719 : if (dst_regno >= FIRST_PSEUDO_REGISTER
2446 9175719 : && src_regno < FIRST_PSEUDO_REGISTER)
2447 : {
2448 2988965 : hard_regno = src_regno;
2449 2988965 : a = ira_curr_regno_allocno_map[dst_regno];
2450 2988965 : to_p = true;
2451 : }
2452 7562659 : else if (src_regno >= FIRST_PSEUDO_REGISTER
2453 6186754 : && dst_regno < FIRST_PSEUDO_REGISTER)
2454 : {
2455 4810849 : hard_regno = dst_regno;
2456 4810849 : a = ira_curr_regno_allocno_map[src_regno];
2457 4810849 : to_p = false;
2458 : }
2459 : else
2460 1375905 : continue;
2461 15121561 : if (reg_class_size[(int) REGNO_REG_CLASS (hard_regno)]
2462 : == (ira_reg_class_max_nregs
2463 7799814 : [REGNO_REG_CLASS (hard_regno)][(int) ALLOCNO_MODE(a)]))
2464 : /* If the class can provide only one hard reg to the allocno,
2465 : we processed the insn record_operand_costs already and we
2466 : actually updated the hard reg cost there. */
2467 7321747 : continue;
2468 478067 : rclass = ALLOCNO_CLASS (a);
2469 478067 : if (! TEST_HARD_REG_BIT (reg_class_contents[rclass], hard_regno))
2470 23751 : continue;
2471 454316 : i = ira_class_hard_reg_index[rclass][hard_regno];
2472 454316 : if (i < 0)
2473 7119 : continue;
2474 447197 : a_regno = ALLOCNO_REGNO (a);
2475 447197 : for (curr_loop_tree_node = ALLOCNO_LOOP_TREE_NODE (a);
2476 983954 : curr_loop_tree_node != NULL;
2477 536757 : curr_loop_tree_node = curr_loop_tree_node->parent)
2478 536757 : if ((curr_a = curr_loop_tree_node->regno_allocno_map[a_regno]) != NULL)
2479 466127 : ira_add_allocno_pref (curr_a, hard_regno, freq);
2480 447197 : {
2481 447197 : int cost;
2482 447197 : enum reg_class hard_reg_class;
2483 447197 : machine_mode mode;
2484 :
2485 447197 : mode = ALLOCNO_MODE (a);
2486 447197 : hard_reg_class = REGNO_REG_CLASS (hard_regno);
2487 447197 : ira_init_register_move_cost_if_necessary (mode);
2488 447197 : cost = (to_p ? ira_register_move_cost[mode][hard_reg_class][rclass]
2489 248286 : : ira_register_move_cost[mode][rclass][hard_reg_class]) * freq;
2490 447197 : ira_allocate_and_set_costs (&ALLOCNO_HARD_REG_COSTS (a), rclass,
2491 : ALLOCNO_CLASS_COST (a));
2492 447197 : ira_allocate_and_set_costs (&ALLOCNO_CONFLICT_HARD_REG_COSTS (a),
2493 : rclass, 0);
2494 447197 : ALLOCNO_HARD_REG_COSTS (a)[i] -= cost;
2495 447197 : ALLOCNO_CONFLICT_HARD_REG_COSTS (a)[i] -= cost;
2496 447197 : ALLOCNO_CLASS_COST (a) = MIN (ALLOCNO_CLASS_COST (a),
2497 : ALLOCNO_HARD_REG_COSTS (a)[i]);
2498 : }
2499 : }
2500 : }
2501 :
2502 : /* After we find hard register and memory costs for allocnos, define
2503 : its class and modify hard register cost because insns moving
2504 : allocno to/from hard registers. */
2505 : static void
2506 1493940 : setup_allocno_class_and_costs (void)
2507 : {
2508 1493940 : int i, j, n, regno, hard_regno, num;
2509 1493940 : int *reg_costs;
2510 1493940 : enum reg_class aclass, rclass;
2511 1493940 : ira_allocno_t a;
2512 1493940 : ira_allocno_iterator ai;
2513 1493940 : cost_classes_t cost_classes_ptr;
2514 :
2515 1493940 : ira_assert (allocno_p);
2516 37001238 : FOR_EACH_ALLOCNO (a, ai)
2517 : {
2518 35507298 : i = ALLOCNO_NUM (a);
2519 35507298 : regno = ALLOCNO_REGNO (a);
2520 35507298 : aclass = regno_aclass[regno];
2521 35507298 : cost_classes_ptr = regno_cost_classes[regno];
2522 35507298 : ira_assert (pref[i] == NO_REGS || aclass != NO_REGS);
2523 35507298 : ALLOCNO_MEMORY_COST (a) = COSTS (costs, i)->mem_cost;
2524 35507298 : ira_set_allocno_class (a, aclass);
2525 35507298 : if (aclass == NO_REGS)
2526 686801 : continue;
2527 34820497 : if (optimize && ALLOCNO_CLASS (a) != pref[i])
2528 : {
2529 5651195 : n = ira_class_hard_regs_num[aclass];
2530 5651195 : ALLOCNO_HARD_REG_COSTS (a)
2531 5651195 : = reg_costs = ira_allocate_cost_vector (aclass);
2532 101093260 : for (j = n - 1; j >= 0; j--)
2533 : {
2534 95442065 : hard_regno = ira_class_hard_regs[aclass][j];
2535 95442065 : if (TEST_HARD_REG_BIT (reg_class_contents[pref[i]], hard_regno))
2536 15435288 : reg_costs[j] = ALLOCNO_CLASS_COST (a);
2537 : else
2538 : {
2539 80006777 : rclass = REGNO_REG_CLASS (hard_regno);
2540 80006777 : num = cost_classes_ptr->index[rclass];
2541 80006777 : if (num < 0)
2542 : {
2543 279940 : num = cost_classes_ptr->hard_regno_index[hard_regno];
2544 279940 : ira_assert (num >= 0);
2545 : }
2546 80006777 : reg_costs[j] = COSTS (costs, i)->cost[num];
2547 : }
2548 : }
2549 : }
2550 : }
2551 1493940 : if (optimize)
2552 1050840 : ira_traverse_loop_tree (true, ira_loop_tree_root,
2553 : process_bb_node_for_hard_reg_moves, NULL);
2554 1493940 : }
2555 :
2556 :
2557 :
2558 : /* Function called once during compiler work. */
2559 : void
2560 214818 : ira_init_costs_once (void)
2561 : {
2562 214818 : int i;
2563 :
2564 214818 : init_cost = NULL;
2565 6659358 : for (i = 0; i < MAX_RECOG_OPERANDS; i++)
2566 : {
2567 6444540 : op_costs[i] = NULL;
2568 6444540 : this_op_costs[i] = NULL;
2569 : }
2570 214818 : temp_costs = NULL;
2571 214818 : }
2572 :
2573 : /* Free allocated temporary cost vectors. */
2574 : void
2575 805734 : target_ira_int::free_ira_costs ()
2576 : {
2577 805734 : int i;
2578 :
2579 805734 : free (x_init_cost);
2580 805734 : x_init_cost = NULL;
2581 24977754 : for (i = 0; i < MAX_RECOG_OPERANDS; i++)
2582 : {
2583 24172020 : free (x_op_costs[i]);
2584 24172020 : free (x_this_op_costs[i]);
2585 24172020 : x_op_costs[i] = x_this_op_costs[i] = NULL;
2586 : }
2587 805734 : free (x_temp_costs);
2588 805734 : x_temp_costs = NULL;
2589 805734 : }
2590 :
2591 : /* This is called each time register related information is
2592 : changed. */
2593 : void
2594 219158 : ira_init_costs (void)
2595 : {
2596 219158 : int i;
2597 :
2598 219158 : this_target_ira_int->free_ira_costs ();
2599 219158 : max_struct_costs_size
2600 219158 : = sizeof (struct costs) + sizeof (int) * (ira_important_classes_num - 1);
2601 : /* Don't use ira_allocate because vectors live through several IRA
2602 : calls. */
2603 219158 : init_cost = (struct costs *) xmalloc (max_struct_costs_size);
2604 219158 : init_cost->mem_cost = 1000000;
2605 7016825 : for (i = 0; i < ira_important_classes_num; i++)
2606 6797667 : init_cost->cost[i] = 1000000;
2607 6793898 : for (i = 0; i < MAX_RECOG_OPERANDS; i++)
2608 : {
2609 6574740 : op_costs[i] = (struct costs *) xmalloc (max_struct_costs_size);
2610 6574740 : this_op_costs[i] = (struct costs *) xmalloc (max_struct_costs_size);
2611 : }
2612 219158 : temp_costs = (struct costs *) xmalloc (max_struct_costs_size);
2613 219158 : }
2614 :
2615 :
2616 :
2617 : /* Common initialization function for ira_costs and
2618 : ira_set_pseudo_classes. */
2619 : static void
2620 1523827 : init_costs (void)
2621 : {
2622 1523827 : init_subregs_of_mode ();
2623 3047654 : costs = (struct costs *) ira_allocate (max_struct_costs_size
2624 1523827 : * cost_elements_num);
2625 3047654 : pref_buffer = (enum reg_class *) ira_allocate (sizeof (enum reg_class)
2626 1523827 : * cost_elements_num);
2627 4571481 : regno_aclass = (enum reg_class *) ira_allocate (sizeof (enum reg_class)
2628 1523827 : * max_reg_num ());
2629 1523827 : regno_equiv_gains = (int *) ira_allocate (sizeof (int) * max_reg_num ());
2630 1523827 : memset (regno_equiv_gains, 0, sizeof (int) * max_reg_num ());
2631 1523827 : }
2632 :
2633 : /* Common finalization function for ira_costs and
2634 : ira_set_pseudo_classes. */
2635 : static void
2636 1523827 : finish_costs (void)
2637 : {
2638 1523827 : finish_subregs_of_mode ();
2639 1523827 : ira_free (regno_equiv_gains);
2640 1523827 : ira_free (regno_aclass);
2641 1523827 : ira_free (pref_buffer);
2642 1523827 : ira_free (costs);
2643 1523827 : }
2644 :
2645 : /* Entry function which defines register class, memory and hard
2646 : register costs for each allocno. */
2647 : void
2648 1493940 : ira_costs (void)
2649 : {
2650 1493940 : allocno_p = true;
2651 1493940 : cost_elements_num = ira_allocnos_num;
2652 1493940 : init_costs ();
2653 2987880 : total_allocno_costs = (struct costs *) ira_allocate (max_struct_costs_size
2654 1493940 : * ira_allocnos_num);
2655 1493940 : initiate_regno_cost_classes ();
2656 1493940 : if (!ira_use_lra_p)
2657 : /* Process equivs in reload to update costs through hook
2658 : ira_adjust_equiv_reg_cost. */
2659 0 : calculate_elim_costs_all_insns ();
2660 1493940 : find_costs_and_classes ();
2661 1493940 : setup_allocno_class_and_costs ();
2662 1493940 : finish_regno_cost_classes ();
2663 1493940 : finish_costs ();
2664 1493940 : ira_free (total_allocno_costs);
2665 1493940 : }
2666 :
2667 : /* Entry function which defines classes for pseudos.
2668 : Set pseudo_classes_defined_p only if DEFINE_PSEUDO_CLASSES is true. */
2669 : void
2670 29887 : ira_set_pseudo_classes (bool define_pseudo_classes, FILE *dump_file)
2671 : {
2672 29887 : FILE *saved_file = ira_dump_file;
2673 29887 : allocno_p = false;
2674 29887 : internal_flag_ira_verbose = flag_ira_verbose;
2675 29887 : ira_dump_file = dump_file;
2676 29887 : cost_elements_num = max_reg_num ();
2677 29887 : init_costs ();
2678 29887 : initiate_regno_cost_classes ();
2679 29887 : find_costs_and_classes ();
2680 29887 : finish_regno_cost_classes ();
2681 29887 : if (define_pseudo_classes)
2682 101 : pseudo_classes_defined_p = true;
2683 :
2684 29887 : finish_costs ();
2685 29887 : ira_dump_file = saved_file;
2686 29887 : }
2687 :
2688 :
2689 :
2690 : /* Change hard register costs for allocnos which lives through
2691 : function calls. This is called only when we found all intersected
2692 : calls during building allocno live ranges. */
2693 : void
2694 1493940 : ira_tune_allocno_costs (void)
2695 : {
2696 1493940 : int j, n, regno;
2697 1493940 : int cost, min_cost, *reg_costs;
2698 1493940 : enum reg_class aclass;
2699 1493940 : machine_mode mode;
2700 1493940 : ira_allocno_t a;
2701 1493940 : ira_allocno_iterator ai;
2702 1493940 : ira_allocno_object_iterator oi;
2703 1493940 : ira_object_t obj;
2704 1493940 : bool skip_p;
2705 :
2706 38245136 : FOR_EACH_ALLOCNO (a, ai)
2707 : {
2708 36751196 : aclass = ALLOCNO_CLASS (a);
2709 36751196 : if (aclass == NO_REGS)
2710 656787 : continue;
2711 36094409 : mode = ALLOCNO_MODE (a);
2712 36094409 : n = ira_class_hard_regs_num[aclass];
2713 36094409 : min_cost = INT_MAX;
2714 36094409 : if (ALLOCNO_CALLS_CROSSED_NUM (a)
2715 36094409 : != ALLOCNO_CHEAP_CALLS_CROSSED_NUM (a))
2716 : {
2717 3601234 : ira_allocate_and_set_costs
2718 3601234 : (&ALLOCNO_HARD_REG_COSTS (a), aclass,
2719 : ALLOCNO_CLASS_COST (a));
2720 3601234 : reg_costs = ALLOCNO_HARD_REG_COSTS (a);
2721 52308078 : for (j = n - 1; j >= 0; j--)
2722 : {
2723 48706844 : regno = ira_class_hard_regs[aclass][j];
2724 48706844 : skip_p = false;
2725 87581286 : FOR_EACH_ALLOCNO_OBJECT (a, obj, oi)
2726 : {
2727 50102902 : if (ira_hard_reg_set_intersection_p (regno, mode,
2728 : OBJECT_CONFLICT_HARD_REGS
2729 : (obj)))
2730 : {
2731 : skip_p = true;
2732 : break;
2733 : }
2734 : }
2735 48706844 : if (skip_p)
2736 11228460 : continue;
2737 37478384 : cost = 0;
2738 37478384 : if (ira_need_caller_save_p (a, regno))
2739 19352875 : cost += ira_caller_save_cost (a);
2740 : #ifdef IRA_HARD_REGNO_ADD_COST_MULTIPLIER
2741 : {
2742 : auto rclass = REGNO_REG_CLASS (regno);
2743 : cost += ((ira_memory_move_cost[mode][rclass][0]
2744 : + ira_memory_move_cost[mode][rclass][1])
2745 : * ALLOCNO_FREQ (a)
2746 : * IRA_HARD_REGNO_ADD_COST_MULTIPLIER (regno) / 2);
2747 : }
2748 : #endif
2749 37478384 : if (INT_MAX - cost < reg_costs[j])
2750 0 : reg_costs[j] = INT_MAX;
2751 : else
2752 37478384 : reg_costs[j] += cost;
2753 37478384 : if (min_cost > reg_costs[j])
2754 48706844 : min_cost = reg_costs[j];
2755 : }
2756 : }
2757 3601234 : if (min_cost != INT_MAX)
2758 3585100 : ALLOCNO_CLASS_COST (a) = min_cost;
2759 :
2760 : /* Some targets allow pseudos to be allocated to unaligned sequences
2761 : of hard registers. However, selecting an unaligned sequence can
2762 : unnecessarily restrict later allocations. So increase the cost of
2763 : unaligned hard regs to encourage the use of aligned hard regs. */
2764 36094409 : {
2765 36094409 : const int nregs = ira_reg_class_max_nregs[aclass][ALLOCNO_MODE (a)];
2766 :
2767 36094409 : if (nregs > 1)
2768 : {
2769 1320599 : ira_allocate_and_set_costs
2770 1320599 : (&ALLOCNO_HARD_REG_COSTS (a), aclass, ALLOCNO_CLASS_COST (a));
2771 1320599 : reg_costs = ALLOCNO_HARD_REG_COSTS (a);
2772 29574165 : for (j = n - 1; j >= 0; j--)
2773 : {
2774 28253566 : regno = ira_non_ordered_class_hard_regs[aclass][j];
2775 28253566 : if ((regno % nregs) != 0)
2776 : {
2777 13888274 : int index = ira_class_hard_reg_index[aclass][regno];
2778 13888274 : ira_assert (index != -1);
2779 13888274 : reg_costs[index] += ALLOCNO_FREQ (a);
2780 : }
2781 : }
2782 : }
2783 : }
2784 : }
2785 1493940 : }
2786 :
2787 : /* A hook from the reload pass. Add COST to the estimated gain for eliminating
2788 : REGNO with its equivalence. If COST is zero, record that no such
2789 : elimination is possible. */
2790 :
2791 : void
2792 0 : ira_adjust_equiv_reg_cost (unsigned regno, int cost)
2793 : {
2794 0 : ira_assert (!ira_use_lra_p);
2795 0 : if (cost == 0)
2796 0 : regno_equiv_gains[regno] = 0;
2797 : else
2798 0 : regno_equiv_gains[regno] += cost;
2799 0 : }
2800 :
2801 : void
2802 263876 : ira_costs_cc_finalize (void)
2803 : {
2804 263876 : this_target_ira_int->free_ira_costs ();
2805 263876 : }
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