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058e97ec | 1 | /* Building internal representation for IRA. |
99dee823 | 2 | Copyright (C) 2006-2021 Free Software Foundation, Inc. |
058e97ec VM |
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" | |
c7131fb2 | 24 | #include "backend.h" |
957060b5 | 25 | #include "target.h" |
058e97ec | 26 | #include "rtl.h" |
957060b5 | 27 | #include "predict.h" |
c7131fb2 | 28 | #include "df.h" |
058e97ec | 29 | #include "insn-config.h" |
957060b5 | 30 | #include "regs.h" |
4d0cdd0c | 31 | #include "memmodel.h" |
957060b5 AM |
32 | #include "ira.h" |
33 | #include "ira-int.h" | |
058e97ec | 34 | #include "sparseset.h" |
c7131fb2 | 35 | #include "cfgloop.h" |
058e97ec | 36 | |
070a1983 | 37 | static ira_copy_t find_allocno_copy (ira_allocno_t, ira_allocno_t, rtx_insn *, |
058e97ec VM |
38 | ira_loop_tree_node_t); |
39 | ||
40 | /* The root of the loop tree corresponding to the all function. */ | |
41 | ira_loop_tree_node_t ira_loop_tree_root; | |
42 | ||
43 | /* Height of the loop tree. */ | |
44 | int ira_loop_tree_height; | |
45 | ||
46 | /* All nodes representing basic blocks are referred through the | |
67914693 | 47 | following array. We cannot use basic block member `aux' for this |
058e97ec VM |
48 | because it is used for insertion of insns on edges. */ |
49 | ira_loop_tree_node_t ira_bb_nodes; | |
50 | ||
51 | /* All nodes representing loops are referred through the following | |
52 | array. */ | |
53 | ira_loop_tree_node_t ira_loop_nodes; | |
54 | ||
caff7edf JJ |
55 | /* And size of the ira_loop_nodes array. */ |
56 | unsigned int ira_loop_nodes_count; | |
57 | ||
b8698a0f | 58 | /* Map regno -> allocnos with given regno (see comments for |
058e97ec VM |
59 | allocno member `next_regno_allocno'). */ |
60 | ira_allocno_t *ira_regno_allocno_map; | |
61 | ||
62 | /* Array of references to all allocnos. The order number of the | |
63 | allocno corresponds to the index in the array. Removed allocnos | |
64 | have NULL element value. */ | |
65 | ira_allocno_t *ira_allocnos; | |
66 | ||
67 | /* Sizes of the previous array. */ | |
68 | int ira_allocnos_num; | |
69 | ||
a49ae217 BS |
70 | /* Count of conflict record structures we've created, used when creating |
71 | a new conflict id. */ | |
72 | int ira_objects_num; | |
73 | ||
74 | /* Map a conflict id to its conflict record. */ | |
75 | ira_object_t *ira_object_id_map; | |
058e97ec | 76 | |
3b6d1699 VM |
77 | /* Array of references to all allocno preferences. The order number |
78 | of the preference corresponds to the index in the array. */ | |
79 | ira_pref_t *ira_prefs; | |
80 | ||
81 | /* Size of the previous array. */ | |
82 | int ira_prefs_num; | |
83 | ||
058e97ec VM |
84 | /* Array of references to all copies. The order number of the copy |
85 | corresponds to the index in the array. Removed copies have NULL | |
86 | element value. */ | |
87 | ira_copy_t *ira_copies; | |
88 | ||
89 | /* Size of the previous array. */ | |
90 | int ira_copies_num; | |
91 | ||
92 | \f | |
93 | ||
94 | /* LAST_BASIC_BLOCK before generating additional insns because of live | |
95 | range splitting. Emitting insns on a critical edge creates a new | |
96 | basic block. */ | |
97 | static int last_basic_block_before_change; | |
98 | ||
2608d841 VM |
99 | /* Initialize some members in loop tree node NODE. Use LOOP_NUM for |
100 | the member loop_num. */ | |
058e97ec | 101 | static void |
2608d841 VM |
102 | init_loop_tree_node (struct ira_loop_tree_node *node, int loop_num) |
103 | { | |
104 | int max_regno = max_reg_num (); | |
105 | ||
106 | node->regno_allocno_map | |
107 | = (ira_allocno_t *) ira_allocate (sizeof (ira_allocno_t) * max_regno); | |
108 | memset (node->regno_allocno_map, 0, sizeof (ira_allocno_t) * max_regno); | |
109 | memset (node->reg_pressure, 0, sizeof (node->reg_pressure)); | |
110 | node->all_allocnos = ira_allocate_bitmap (); | |
111 | node->modified_regnos = ira_allocate_bitmap (); | |
112 | node->border_allocnos = ira_allocate_bitmap (); | |
113 | node->local_copies = ira_allocate_bitmap (); | |
114 | node->loop_num = loop_num; | |
115 | node->children = NULL; | |
116 | node->subloops = NULL; | |
117 | } | |
118 | ||
119 | ||
120 | /* The following function allocates the loop tree nodes. If | |
121 | CURRENT_LOOPS is NULL, the nodes corresponding to the loops (except | |
122 | the root which corresponds the all function) will be not allocated | |
123 | but nodes will still be allocated for basic blocks. */ | |
124 | static void | |
125 | create_loop_tree_nodes (void) | |
058e97ec VM |
126 | { |
127 | unsigned int i, j; | |
058e97ec VM |
128 | bool skip_p; |
129 | edge_iterator ei; | |
130 | edge e; | |
058e97ec VM |
131 | loop_p loop; |
132 | ||
133 | ira_bb_nodes | |
134 | = ((struct ira_loop_tree_node *) | |
8b1c6fd7 DM |
135 | ira_allocate (sizeof (struct ira_loop_tree_node) |
136 | * last_basic_block_for_fn (cfun))); | |
137 | last_basic_block_before_change = last_basic_block_for_fn (cfun); | |
138 | for (i = 0; i < (unsigned int) last_basic_block_for_fn (cfun); i++) | |
058e97ec VM |
139 | { |
140 | ira_bb_nodes[i].regno_allocno_map = NULL; | |
141 | memset (ira_bb_nodes[i].reg_pressure, 0, | |
142 | sizeof (ira_bb_nodes[i].reg_pressure)); | |
49d988e7 | 143 | ira_bb_nodes[i].all_allocnos = NULL; |
058e97ec VM |
144 | ira_bb_nodes[i].modified_regnos = NULL; |
145 | ira_bb_nodes[i].border_allocnos = NULL; | |
146 | ira_bb_nodes[i].local_copies = NULL; | |
147 | } | |
2608d841 VM |
148 | if (current_loops == NULL) |
149 | { | |
caff7edf | 150 | ira_loop_nodes_count = 1; |
2608d841 VM |
151 | ira_loop_nodes = ((struct ira_loop_tree_node *) |
152 | ira_allocate (sizeof (struct ira_loop_tree_node))); | |
153 | init_loop_tree_node (ira_loop_nodes, 0); | |
154 | return; | |
155 | } | |
0fc822d0 | 156 | ira_loop_nodes_count = number_of_loops (cfun); |
058e97ec VM |
157 | ira_loop_nodes = ((struct ira_loop_tree_node *) |
158 | ira_allocate (sizeof (struct ira_loop_tree_node) | |
caff7edf | 159 | * ira_loop_nodes_count)); |
0fc822d0 | 160 | FOR_EACH_VEC_SAFE_ELT (get_loops (cfun), i, loop) |
058e97ec | 161 | { |
661bc682 | 162 | if (loop_outer (loop) != NULL) |
058e97ec VM |
163 | { |
164 | ira_loop_nodes[i].regno_allocno_map = NULL; | |
058e97ec VM |
165 | skip_p = false; |
166 | FOR_EACH_EDGE (e, ei, loop->header->preds) | |
167 | if (e->src != loop->latch | |
168 | && (e->flags & EDGE_ABNORMAL) && EDGE_CRITICAL_P (e)) | |
169 | { | |
170 | skip_p = true; | |
171 | break; | |
172 | } | |
173 | if (skip_p) | |
174 | continue; | |
4b9d61f7 | 175 | auto_vec<edge> edges = get_loop_exit_edges (loop); |
9771b263 | 176 | FOR_EACH_VEC_ELT (edges, j, e) |
058e97ec VM |
177 | if ((e->flags & EDGE_ABNORMAL) && EDGE_CRITICAL_P (e)) |
178 | { | |
179 | skip_p = true; | |
180 | break; | |
181 | } | |
058e97ec VM |
182 | if (skip_p) |
183 | continue; | |
184 | } | |
2608d841 | 185 | init_loop_tree_node (&ira_loop_nodes[i], loop->num); |
058e97ec VM |
186 | } |
187 | } | |
188 | ||
189 | /* The function returns TRUE if there are more one allocation | |
190 | region. */ | |
191 | static bool | |
192 | more_one_region_p (void) | |
193 | { | |
194 | unsigned int i; | |
195 | loop_p loop; | |
196 | ||
2608d841 | 197 | if (current_loops != NULL) |
0fc822d0 | 198 | FOR_EACH_VEC_SAFE_ELT (get_loops (cfun), i, loop) |
2608d841 VM |
199 | if (ira_loop_nodes[i].regno_allocno_map != NULL |
200 | && ira_loop_tree_root != &ira_loop_nodes[i]) | |
201 | return true; | |
058e97ec VM |
202 | return false; |
203 | } | |
204 | ||
205 | /* Free the loop tree node of a loop. */ | |
206 | static void | |
207 | finish_loop_tree_node (ira_loop_tree_node_t loop) | |
208 | { | |
209 | if (loop->regno_allocno_map != NULL) | |
210 | { | |
211 | ira_assert (loop->bb == NULL); | |
212 | ira_free_bitmap (loop->local_copies); | |
213 | ira_free_bitmap (loop->border_allocnos); | |
214 | ira_free_bitmap (loop->modified_regnos); | |
49d988e7 | 215 | ira_free_bitmap (loop->all_allocnos); |
058e97ec VM |
216 | ira_free (loop->regno_allocno_map); |
217 | loop->regno_allocno_map = NULL; | |
218 | } | |
219 | } | |
220 | ||
221 | /* Free the loop tree nodes. */ | |
222 | static void | |
223 | finish_loop_tree_nodes (void) | |
224 | { | |
225 | unsigned int i; | |
058e97ec | 226 | |
caff7edf JJ |
227 | for (i = 0; i < ira_loop_nodes_count; i++) |
228 | finish_loop_tree_node (&ira_loop_nodes[i]); | |
058e97ec VM |
229 | ira_free (ira_loop_nodes); |
230 | for (i = 0; i < (unsigned int) last_basic_block_before_change; i++) | |
231 | { | |
232 | if (ira_bb_nodes[i].local_copies != NULL) | |
233 | ira_free_bitmap (ira_bb_nodes[i].local_copies); | |
234 | if (ira_bb_nodes[i].border_allocnos != NULL) | |
235 | ira_free_bitmap (ira_bb_nodes[i].border_allocnos); | |
236 | if (ira_bb_nodes[i].modified_regnos != NULL) | |
237 | ira_free_bitmap (ira_bb_nodes[i].modified_regnos); | |
49d988e7 VM |
238 | if (ira_bb_nodes[i].all_allocnos != NULL) |
239 | ira_free_bitmap (ira_bb_nodes[i].all_allocnos); | |
058e97ec VM |
240 | if (ira_bb_nodes[i].regno_allocno_map != NULL) |
241 | ira_free (ira_bb_nodes[i].regno_allocno_map); | |
242 | } | |
243 | ira_free (ira_bb_nodes); | |
244 | } | |
245 | ||
246 | \f | |
247 | ||
248 | /* The following recursive function adds LOOP to the loop tree | |
2608d841 VM |
249 | hierarchy. LOOP is added only once. If LOOP is NULL we adding |
250 | loop designating the whole function when CFG loops are not | |
251 | built. */ | |
058e97ec | 252 | static void |
99b1c316 | 253 | add_loop_to_tree (class loop *loop) |
058e97ec | 254 | { |
2608d841 | 255 | int loop_num; |
99b1c316 | 256 | class loop *parent; |
058e97ec VM |
257 | ira_loop_tree_node_t loop_node, parent_node; |
258 | ||
67914693 | 259 | /* We cannot use loop node access macros here because of potential |
058e97ec VM |
260 | checking and because the nodes are not initialized enough |
261 | yet. */ | |
2608d841 | 262 | if (loop != NULL && loop_outer (loop) != NULL) |
058e97ec | 263 | add_loop_to_tree (loop_outer (loop)); |
2608d841 VM |
264 | loop_num = loop != NULL ? loop->num : 0; |
265 | if (ira_loop_nodes[loop_num].regno_allocno_map != NULL | |
266 | && ira_loop_nodes[loop_num].children == NULL) | |
058e97ec VM |
267 | { |
268 | /* We have not added loop node to the tree yet. */ | |
2608d841 | 269 | loop_node = &ira_loop_nodes[loop_num]; |
058e97ec VM |
270 | loop_node->loop = loop; |
271 | loop_node->bb = NULL; | |
2608d841 VM |
272 | if (loop == NULL) |
273 | parent = NULL; | |
274 | else | |
275 | { | |
276 | for (parent = loop_outer (loop); | |
277 | parent != NULL; | |
278 | parent = loop_outer (parent)) | |
279 | if (ira_loop_nodes[parent->num].regno_allocno_map != NULL) | |
280 | break; | |
281 | } | |
058e97ec VM |
282 | if (parent == NULL) |
283 | { | |
284 | loop_node->next = NULL; | |
285 | loop_node->subloop_next = NULL; | |
286 | loop_node->parent = NULL; | |
287 | } | |
288 | else | |
289 | { | |
290 | parent_node = &ira_loop_nodes[parent->num]; | |
291 | loop_node->next = parent_node->children; | |
292 | parent_node->children = loop_node; | |
293 | loop_node->subloop_next = parent_node->subloops; | |
294 | parent_node->subloops = loop_node; | |
295 | loop_node->parent = parent_node; | |
296 | } | |
297 | } | |
298 | } | |
299 | ||
300 | /* The following recursive function sets up levels of nodes of the | |
301 | tree given its root LOOP_NODE. The enumeration starts with LEVEL. | |
302 | The function returns maximal value of level in the tree + 1. */ | |
303 | static int | |
304 | setup_loop_tree_level (ira_loop_tree_node_t loop_node, int level) | |
305 | { | |
306 | int height, max_height; | |
307 | ira_loop_tree_node_t subloop_node; | |
308 | ||
309 | ira_assert (loop_node->bb == NULL); | |
310 | loop_node->level = level; | |
311 | max_height = level + 1; | |
312 | for (subloop_node = loop_node->subloops; | |
313 | subloop_node != NULL; | |
314 | subloop_node = subloop_node->subloop_next) | |
315 | { | |
316 | ira_assert (subloop_node->bb == NULL); | |
317 | height = setup_loop_tree_level (subloop_node, level + 1); | |
318 | if (height > max_height) | |
319 | max_height = height; | |
320 | } | |
321 | return max_height; | |
322 | } | |
323 | ||
324 | /* Create the loop tree. The algorithm is designed to provide correct | |
325 | order of loops (they are ordered by their last loop BB) and basic | |
326 | blocks in the chain formed by member next. */ | |
327 | static void | |
328 | form_loop_tree (void) | |
329 | { | |
058e97ec | 330 | basic_block bb; |
99b1c316 | 331 | class loop *parent; |
058e97ec | 332 | ira_loop_tree_node_t bb_node, loop_node; |
058e97ec | 333 | |
67914693 | 334 | /* We cannot use loop/bb node access macros because of potential |
058e97ec VM |
335 | checking and because the nodes are not initialized enough |
336 | yet. */ | |
11cd3bed | 337 | FOR_EACH_BB_FN (bb, cfun) |
058e97ec VM |
338 | { |
339 | bb_node = &ira_bb_nodes[bb->index]; | |
340 | bb_node->bb = bb; | |
341 | bb_node->loop = NULL; | |
342 | bb_node->subloops = NULL; | |
343 | bb_node->children = NULL; | |
344 | bb_node->subloop_next = NULL; | |
345 | bb_node->next = NULL; | |
2608d841 VM |
346 | if (current_loops == NULL) |
347 | parent = NULL; | |
348 | else | |
349 | { | |
350 | for (parent = bb->loop_father; | |
351 | parent != NULL; | |
352 | parent = loop_outer (parent)) | |
353 | if (ira_loop_nodes[parent->num].regno_allocno_map != NULL) | |
354 | break; | |
355 | } | |
058e97ec | 356 | add_loop_to_tree (parent); |
2608d841 | 357 | loop_node = &ira_loop_nodes[parent == NULL ? 0 : parent->num]; |
058e97ec VM |
358 | bb_node->next = loop_node->children; |
359 | bb_node->parent = loop_node; | |
360 | loop_node->children = bb_node; | |
361 | } | |
2608d841 | 362 | ira_loop_tree_root = IRA_LOOP_NODE_BY_INDEX (0); |
058e97ec VM |
363 | ira_loop_tree_height = setup_loop_tree_level (ira_loop_tree_root, 0); |
364 | ira_assert (ira_loop_tree_root->regno_allocno_map != NULL); | |
365 | } | |
366 | ||
367 | \f | |
368 | ||
369 | /* Rebuild IRA_REGNO_ALLOCNO_MAP and REGNO_ALLOCNO_MAPs of the loop | |
370 | tree nodes. */ | |
371 | static void | |
372 | rebuild_regno_allocno_maps (void) | |
373 | { | |
374 | unsigned int l; | |
375 | int max_regno, regno; | |
376 | ira_allocno_t a; | |
377 | ira_loop_tree_node_t loop_tree_node; | |
378 | loop_p loop; | |
379 | ira_allocno_iterator ai; | |
380 | ||
2608d841 | 381 | ira_assert (current_loops != NULL); |
058e97ec | 382 | max_regno = max_reg_num (); |
0fc822d0 | 383 | FOR_EACH_VEC_SAFE_ELT (get_loops (cfun), l, loop) |
058e97ec VM |
384 | if (ira_loop_nodes[l].regno_allocno_map != NULL) |
385 | { | |
386 | ira_free (ira_loop_nodes[l].regno_allocno_map); | |
387 | ira_loop_nodes[l].regno_allocno_map | |
388 | = (ira_allocno_t *) ira_allocate (sizeof (ira_allocno_t) | |
389 | * max_regno); | |
390 | memset (ira_loop_nodes[l].regno_allocno_map, 0, | |
391 | sizeof (ira_allocno_t) * max_regno); | |
392 | } | |
393 | ira_free (ira_regno_allocno_map); | |
394 | ira_regno_allocno_map | |
395 | = (ira_allocno_t *) ira_allocate (max_regno * sizeof (ira_allocno_t)); | |
396 | memset (ira_regno_allocno_map, 0, max_regno * sizeof (ira_allocno_t)); | |
397 | FOR_EACH_ALLOCNO (a, ai) | |
398 | { | |
399 | if (ALLOCNO_CAP_MEMBER (a) != NULL) | |
400 | /* Caps are not in the regno allocno maps. */ | |
401 | continue; | |
402 | regno = ALLOCNO_REGNO (a); | |
403 | loop_tree_node = ALLOCNO_LOOP_TREE_NODE (a); | |
404 | ALLOCNO_NEXT_REGNO_ALLOCNO (a) = ira_regno_allocno_map[regno]; | |
405 | ira_regno_allocno_map[regno] = a; | |
406 | if (loop_tree_node->regno_allocno_map[regno] == NULL) | |
407 | /* Remember that we can create temporary allocnos to break | |
408 | cycles in register shuffle. */ | |
409 | loop_tree_node->regno_allocno_map[regno] = a; | |
410 | } | |
411 | } | |
058e97ec VM |
412 | \f |
413 | ||
a49ae217 | 414 | /* Pools for allocnos, allocno live ranges and objects. */ |
fcb87c50 MM |
415 | static object_allocator<live_range> live_range_pool ("live ranges"); |
416 | static object_allocator<ira_allocno> allocno_pool ("allocnos"); | |
417 | static object_allocator<ira_object> object_pool ("objects"); | |
058e97ec VM |
418 | |
419 | /* Vec containing references to all created allocnos. It is a | |
420 | container of array allocnos. */ | |
9771b263 | 421 | static vec<ira_allocno_t> allocno_vec; |
058e97ec | 422 | |
a49ae217 BS |
423 | /* Vec containing references to all created ira_objects. It is a |
424 | container of ira_object_id_map. */ | |
9771b263 | 425 | static vec<ira_object_t> ira_object_id_map_vec; |
058e97ec VM |
426 | |
427 | /* Initialize data concerning allocnos. */ | |
428 | static void | |
429 | initiate_allocnos (void) | |
430 | { | |
9771b263 | 431 | allocno_vec.create (max_reg_num () * 2); |
058e97ec VM |
432 | ira_allocnos = NULL; |
433 | ira_allocnos_num = 0; | |
a49ae217 | 434 | ira_objects_num = 0; |
9771b263 | 435 | ira_object_id_map_vec.create (max_reg_num () * 2); |
a49ae217 | 436 | ira_object_id_map = NULL; |
058e97ec | 437 | ira_regno_allocno_map |
1756cb66 VM |
438 | = (ira_allocno_t *) ira_allocate (max_reg_num () |
439 | * sizeof (ira_allocno_t)); | |
058e97ec VM |
440 | memset (ira_regno_allocno_map, 0, max_reg_num () * sizeof (ira_allocno_t)); |
441 | } | |
442 | ||
a49ae217 BS |
443 | /* Create and return an object corresponding to a new allocno A. */ |
444 | static ira_object_t | |
ac0ab4f7 | 445 | ira_create_object (ira_allocno_t a, int subword) |
a49ae217 | 446 | { |
1756cb66 | 447 | enum reg_class aclass = ALLOCNO_CLASS (a); |
0b470bae | 448 | ira_object_t obj = object_pool.allocate (); |
a49ae217 BS |
449 | |
450 | OBJECT_ALLOCNO (obj) = a; | |
ac0ab4f7 | 451 | OBJECT_SUBWORD (obj) = subword; |
a49ae217 BS |
452 | OBJECT_CONFLICT_ID (obj) = ira_objects_num; |
453 | OBJECT_CONFLICT_VEC_P (obj) = false; | |
454 | OBJECT_CONFLICT_ARRAY (obj) = NULL; | |
455 | OBJECT_NUM_CONFLICTS (obj) = 0; | |
6576d245 RS |
456 | OBJECT_CONFLICT_HARD_REGS (obj) = ira_no_alloc_regs; |
457 | OBJECT_TOTAL_CONFLICT_HARD_REGS (obj) = ira_no_alloc_regs; | |
4897c5aa RS |
458 | OBJECT_CONFLICT_HARD_REGS (obj) |= ~reg_class_contents[aclass]; |
459 | OBJECT_TOTAL_CONFLICT_HARD_REGS (obj) |= ~reg_class_contents[aclass]; | |
a49ae217 BS |
460 | OBJECT_MIN (obj) = INT_MAX; |
461 | OBJECT_MAX (obj) = -1; | |
9140d27b | 462 | OBJECT_LIVE_RANGES (obj) = NULL; |
a49ae217 | 463 | |
9771b263 | 464 | ira_object_id_map_vec.safe_push (obj); |
a49ae217 | 465 | ira_object_id_map |
9771b263 DN |
466 | = ira_object_id_map_vec.address (); |
467 | ira_objects_num = ira_object_id_map_vec.length (); | |
ac0ab4f7 | 468 | |
a49ae217 BS |
469 | return obj; |
470 | } | |
471 | ||
058e97ec VM |
472 | /* Create and return the allocno corresponding to REGNO in |
473 | LOOP_TREE_NODE. Add the allocno to the list of allocnos with the | |
474 | same regno if CAP_P is FALSE. */ | |
475 | ira_allocno_t | |
1756cb66 VM |
476 | ira_create_allocno (int regno, bool cap_p, |
477 | ira_loop_tree_node_t loop_tree_node) | |
058e97ec VM |
478 | { |
479 | ira_allocno_t a; | |
480 | ||
0b470bae | 481 | a = allocno_pool.allocate (); |
058e97ec VM |
482 | ALLOCNO_REGNO (a) = regno; |
483 | ALLOCNO_LOOP_TREE_NODE (a) = loop_tree_node; | |
484 | if (! cap_p) | |
485 | { | |
486 | ALLOCNO_NEXT_REGNO_ALLOCNO (a) = ira_regno_allocno_map[regno]; | |
487 | ira_regno_allocno_map[regno] = a; | |
488 | if (loop_tree_node->regno_allocno_map[regno] == NULL) | |
489 | /* Remember that we can create temporary allocnos to break | |
490 | cycles in register shuffle on region borders (see | |
491 | ira-emit.c). */ | |
492 | loop_tree_node->regno_allocno_map[regno] = a; | |
493 | } | |
494 | ALLOCNO_CAP (a) = NULL; | |
495 | ALLOCNO_CAP_MEMBER (a) = NULL; | |
496 | ALLOCNO_NUM (a) = ira_allocnos_num; | |
49d988e7 | 497 | bitmap_set_bit (loop_tree_node->all_allocnos, ALLOCNO_NUM (a)); |
058e97ec | 498 | ALLOCNO_NREFS (a) = 0; |
854bd721 | 499 | ALLOCNO_FREQ (a) = 0; |
058e97ec VM |
500 | ALLOCNO_HARD_REGNO (a) = -1; |
501 | ALLOCNO_CALL_FREQ (a) = 0; | |
502 | ALLOCNO_CALLS_CROSSED_NUM (a) = 0; | |
e384e6b5 | 503 | ALLOCNO_CHEAP_CALLS_CROSSED_NUM (a) = 0; |
3366b378 | 504 | ALLOCNO_CROSSED_CALLS_ABIS (a) = 0; |
c2ba7e7a | 505 | CLEAR_HARD_REG_SET (ALLOCNO_CROSSED_CALLS_CLOBBERED_REGS (a)); |
058e97ec VM |
506 | #ifdef STACK_REGS |
507 | ALLOCNO_NO_STACK_REG_P (a) = false; | |
508 | ALLOCNO_TOTAL_NO_STACK_REG_P (a) = false; | |
509 | #endif | |
058e97ec | 510 | ALLOCNO_DONT_REASSIGN_P (a) = false; |
927425df | 511 | ALLOCNO_BAD_SPILL_P (a) = false; |
058e97ec | 512 | ALLOCNO_ASSIGNED_P (a) = false; |
058e97ec | 513 | ALLOCNO_MODE (a) = (regno < 0 ? VOIDmode : PSEUDO_REGNO_MODE (regno)); |
d1bb282e | 514 | ALLOCNO_WMODE (a) = ALLOCNO_MODE (a); |
3b6d1699 | 515 | ALLOCNO_PREFS (a) = NULL; |
058e97ec VM |
516 | ALLOCNO_COPIES (a) = NULL; |
517 | ALLOCNO_HARD_REG_COSTS (a) = NULL; | |
518 | ALLOCNO_CONFLICT_HARD_REG_COSTS (a) = NULL; | |
519 | ALLOCNO_UPDATED_HARD_REG_COSTS (a) = NULL; | |
520 | ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a) = NULL; | |
1756cb66 VM |
521 | ALLOCNO_CLASS (a) = NO_REGS; |
522 | ALLOCNO_UPDATED_CLASS_COST (a) = 0; | |
523 | ALLOCNO_CLASS_COST (a) = 0; | |
058e97ec VM |
524 | ALLOCNO_MEMORY_COST (a) = 0; |
525 | ALLOCNO_UPDATED_MEMORY_COST (a) = 0; | |
526 | ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (a) = 0; | |
ac0ab4f7 | 527 | ALLOCNO_NUM_OBJECTS (a) = 0; |
a49ae217 | 528 | |
1756cb66 | 529 | ALLOCNO_ADD_DATA (a) = NULL; |
9771b263 DN |
530 | allocno_vec.safe_push (a); |
531 | ira_allocnos = allocno_vec.address (); | |
532 | ira_allocnos_num = allocno_vec.length (); | |
ac0ab4f7 | 533 | |
058e97ec VM |
534 | return a; |
535 | } | |
536 | ||
1756cb66 VM |
537 | /* Set up register class for A and update its conflict hard |
538 | registers. */ | |
058e97ec | 539 | void |
1756cb66 | 540 | ira_set_allocno_class (ira_allocno_t a, enum reg_class aclass) |
058e97ec | 541 | { |
1756cb66 VM |
542 | ira_allocno_object_iterator oi; |
543 | ira_object_t obj; | |
544 | ||
545 | ALLOCNO_CLASS (a) = aclass; | |
546 | FOR_EACH_ALLOCNO_OBJECT (a, obj, oi) | |
547 | { | |
4897c5aa RS |
548 | OBJECT_CONFLICT_HARD_REGS (obj) |= ~reg_class_contents[aclass]; |
549 | OBJECT_TOTAL_CONFLICT_HARD_REGS (obj) |= ~reg_class_contents[aclass]; | |
1756cb66 | 550 | } |
a49ae217 BS |
551 | } |
552 | ||
ac0ab4f7 BS |
553 | /* Determine the number of objects we should associate with allocno A |
554 | and allocate them. */ | |
a49ae217 | 555 | void |
ac0ab4f7 | 556 | ira_create_allocno_objects (ira_allocno_t a) |
a49ae217 | 557 | { |
ef4bddc2 | 558 | machine_mode mode = ALLOCNO_MODE (a); |
1756cb66 VM |
559 | enum reg_class aclass = ALLOCNO_CLASS (a); |
560 | int n = ira_reg_class_max_nregs[aclass][mode]; | |
ac0ab4f7 BS |
561 | int i; |
562 | ||
cf098191 | 563 | if (n != 2 || maybe_ne (GET_MODE_SIZE (mode), n * UNITS_PER_WORD)) |
ac0ab4f7 BS |
564 | n = 1; |
565 | ||
566 | ALLOCNO_NUM_OBJECTS (a) = n; | |
567 | for (i = 0; i < n; i++) | |
568 | ALLOCNO_OBJECT (a, i) = ira_create_object (a, i); | |
a49ae217 BS |
569 | } |
570 | ||
ac0ab4f7 | 571 | /* For each allocno, set ALLOCNO_NUM_OBJECTS and create the |
1756cb66 | 572 | ALLOCNO_OBJECT structures. This must be called after the allocno |
ac0ab4f7 | 573 | classes are known. */ |
a49ae217 BS |
574 | static void |
575 | create_allocno_objects (void) | |
576 | { | |
577 | ira_allocno_t a; | |
578 | ira_allocno_iterator ai; | |
579 | ||
580 | FOR_EACH_ALLOCNO (a, ai) | |
ac0ab4f7 | 581 | ira_create_allocno_objects (a); |
058e97ec VM |
582 | } |
583 | ||
ac0ab4f7 BS |
584 | /* Merge hard register conflict information for all objects associated with |
585 | allocno TO into the corresponding objects associated with FROM. | |
586 | If TOTAL_ONLY is true, we only merge OBJECT_TOTAL_CONFLICT_HARD_REGS. */ | |
3c55880a BS |
587 | static void |
588 | merge_hard_reg_conflicts (ira_allocno_t from, ira_allocno_t to, | |
589 | bool total_only) | |
590 | { | |
ac0ab4f7 BS |
591 | int i; |
592 | gcc_assert (ALLOCNO_NUM_OBJECTS (to) == ALLOCNO_NUM_OBJECTS (from)); | |
593 | for (i = 0; i < ALLOCNO_NUM_OBJECTS (to); i++) | |
594 | { | |
595 | ira_object_t from_obj = ALLOCNO_OBJECT (from, i); | |
596 | ira_object_t to_obj = ALLOCNO_OBJECT (to, i); | |
1756cb66 | 597 | |
ac0ab4f7 | 598 | if (!total_only) |
44942965 RS |
599 | OBJECT_CONFLICT_HARD_REGS (to_obj) |
600 | |= OBJECT_CONFLICT_HARD_REGS (from_obj); | |
601 | OBJECT_TOTAL_CONFLICT_HARD_REGS (to_obj) | |
602 | |= OBJECT_TOTAL_CONFLICT_HARD_REGS (from_obj); | |
ac0ab4f7 | 603 | } |
3c55880a BS |
604 | #ifdef STACK_REGS |
605 | if (!total_only && ALLOCNO_NO_STACK_REG_P (from)) | |
606 | ALLOCNO_NO_STACK_REG_P (to) = true; | |
607 | if (ALLOCNO_TOTAL_NO_STACK_REG_P (from)) | |
608 | ALLOCNO_TOTAL_NO_STACK_REG_P (to) = true; | |
609 | #endif | |
610 | } | |
611 | ||
ac0ab4f7 BS |
612 | /* Update hard register conflict information for all objects associated with |
613 | A to include the regs in SET. */ | |
614 | void | |
75f4e3a1 | 615 | ior_hard_reg_conflicts (ira_allocno_t a, const_hard_reg_set set) |
ac0ab4f7 BS |
616 | { |
617 | ira_allocno_object_iterator i; | |
618 | ira_object_t obj; | |
1756cb66 | 619 | |
ac0ab4f7 BS |
620 | FOR_EACH_ALLOCNO_OBJECT (a, obj, i) |
621 | { | |
75f4e3a1 RS |
622 | OBJECT_CONFLICT_HARD_REGS (obj) |= set; |
623 | OBJECT_TOTAL_CONFLICT_HARD_REGS (obj) |= set; | |
ac0ab4f7 BS |
624 | } |
625 | } | |
626 | ||
a49ae217 BS |
627 | /* Return TRUE if a conflict vector with NUM elements is more |
628 | profitable than a conflict bit vector for OBJ. */ | |
058e97ec | 629 | bool |
a49ae217 | 630 | ira_conflict_vector_profitable_p (ira_object_t obj, int num) |
058e97ec VM |
631 | { |
632 | int nw; | |
a49ae217 BS |
633 | int max = OBJECT_MAX (obj); |
634 | int min = OBJECT_MIN (obj); | |
058e97ec | 635 | |
a49ae217 BS |
636 | if (max < min) |
637 | /* We prefer a bit vector in such case because it does not result | |
638 | in allocation. */ | |
058e97ec VM |
639 | return false; |
640 | ||
a49ae217 BS |
641 | nw = (max - min + IRA_INT_BITS) / IRA_INT_BITS; |
642 | return (2 * sizeof (ira_object_t) * (num + 1) | |
058e97ec VM |
643 | < 3 * nw * sizeof (IRA_INT_TYPE)); |
644 | } | |
645 | ||
a49ae217 BS |
646 | /* Allocates and initialize the conflict vector of OBJ for NUM |
647 | conflicting objects. */ | |
058e97ec | 648 | void |
a49ae217 | 649 | ira_allocate_conflict_vec (ira_object_t obj, int num) |
058e97ec VM |
650 | { |
651 | int size; | |
a49ae217 | 652 | ira_object_t *vec; |
058e97ec | 653 | |
a49ae217 | 654 | ira_assert (OBJECT_CONFLICT_ARRAY (obj) == NULL); |
058e97ec | 655 | num++; /* for NULL end marker */ |
a49ae217 BS |
656 | size = sizeof (ira_object_t) * num; |
657 | OBJECT_CONFLICT_ARRAY (obj) = ira_allocate (size); | |
658 | vec = (ira_object_t *) OBJECT_CONFLICT_ARRAY (obj); | |
058e97ec | 659 | vec[0] = NULL; |
a49ae217 BS |
660 | OBJECT_NUM_CONFLICTS (obj) = 0; |
661 | OBJECT_CONFLICT_ARRAY_SIZE (obj) = size; | |
662 | OBJECT_CONFLICT_VEC_P (obj) = true; | |
058e97ec VM |
663 | } |
664 | ||
a49ae217 | 665 | /* Allocate and initialize the conflict bit vector of OBJ. */ |
058e97ec | 666 | static void |
a49ae217 | 667 | allocate_conflict_bit_vec (ira_object_t obj) |
058e97ec VM |
668 | { |
669 | unsigned int size; | |
670 | ||
a49ae217 BS |
671 | ira_assert (OBJECT_CONFLICT_ARRAY (obj) == NULL); |
672 | size = ((OBJECT_MAX (obj) - OBJECT_MIN (obj) + IRA_INT_BITS) | |
058e97ec | 673 | / IRA_INT_BITS * sizeof (IRA_INT_TYPE)); |
a49ae217 BS |
674 | OBJECT_CONFLICT_ARRAY (obj) = ira_allocate (size); |
675 | memset (OBJECT_CONFLICT_ARRAY (obj), 0, size); | |
676 | OBJECT_CONFLICT_ARRAY_SIZE (obj) = size; | |
677 | OBJECT_CONFLICT_VEC_P (obj) = false; | |
058e97ec VM |
678 | } |
679 | ||
680 | /* Allocate and initialize the conflict vector or conflict bit vector | |
ac0ab4f7 | 681 | of OBJ for NUM conflicting allocnos whatever is more profitable. */ |
058e97ec | 682 | void |
ac0ab4f7 | 683 | ira_allocate_object_conflicts (ira_object_t obj, int num) |
058e97ec | 684 | { |
ac0ab4f7 BS |
685 | if (ira_conflict_vector_profitable_p (obj, num)) |
686 | ira_allocate_conflict_vec (obj, num); | |
058e97ec | 687 | else |
ac0ab4f7 | 688 | allocate_conflict_bit_vec (obj); |
058e97ec VM |
689 | } |
690 | ||
a49ae217 | 691 | /* Add OBJ2 to the conflicts of OBJ1. */ |
058e97ec | 692 | static void |
a49ae217 | 693 | add_to_conflicts (ira_object_t obj1, ira_object_t obj2) |
058e97ec VM |
694 | { |
695 | int num; | |
696 | unsigned int size; | |
697 | ||
a49ae217 | 698 | if (OBJECT_CONFLICT_VEC_P (obj1)) |
058e97ec | 699 | { |
a49ae217 BS |
700 | ira_object_t *vec = OBJECT_CONFLICT_VEC (obj1); |
701 | int curr_num = OBJECT_NUM_CONFLICTS (obj1); | |
702 | num = curr_num + 2; | |
703 | if (OBJECT_CONFLICT_ARRAY_SIZE (obj1) < num * sizeof (ira_object_t)) | |
058e97ec | 704 | { |
a49ae217 | 705 | ira_object_t *newvec; |
058e97ec | 706 | size = (3 * num / 2 + 1) * sizeof (ira_allocno_t); |
a49ae217 BS |
707 | newvec = (ira_object_t *) ira_allocate (size); |
708 | memcpy (newvec, vec, curr_num * sizeof (ira_object_t)); | |
709 | ira_free (vec); | |
710 | vec = newvec; | |
711 | OBJECT_CONFLICT_ARRAY (obj1) = vec; | |
712 | OBJECT_CONFLICT_ARRAY_SIZE (obj1) = size; | |
058e97ec | 713 | } |
a49ae217 | 714 | vec[num - 2] = obj2; |
058e97ec | 715 | vec[num - 1] = NULL; |
a49ae217 | 716 | OBJECT_NUM_CONFLICTS (obj1)++; |
058e97ec VM |
717 | } |
718 | else | |
719 | { | |
720 | int nw, added_head_nw, id; | |
a49ae217 | 721 | IRA_INT_TYPE *vec = OBJECT_CONFLICT_BITVEC (obj1); |
058e97ec | 722 | |
a49ae217 BS |
723 | id = OBJECT_CONFLICT_ID (obj2); |
724 | if (OBJECT_MIN (obj1) > id) | |
058e97ec VM |
725 | { |
726 | /* Expand head of the bit vector. */ | |
a49ae217 BS |
727 | added_head_nw = (OBJECT_MIN (obj1) - id - 1) / IRA_INT_BITS + 1; |
728 | nw = (OBJECT_MAX (obj1) - OBJECT_MIN (obj1)) / IRA_INT_BITS + 1; | |
058e97ec | 729 | size = (nw + added_head_nw) * sizeof (IRA_INT_TYPE); |
a49ae217 | 730 | if (OBJECT_CONFLICT_ARRAY_SIZE (obj1) >= size) |
058e97ec VM |
731 | { |
732 | memmove ((char *) vec + added_head_nw * sizeof (IRA_INT_TYPE), | |
733 | vec, nw * sizeof (IRA_INT_TYPE)); | |
734 | memset (vec, 0, added_head_nw * sizeof (IRA_INT_TYPE)); | |
735 | } | |
736 | else | |
737 | { | |
738 | size | |
739 | = (3 * (nw + added_head_nw) / 2 + 1) * sizeof (IRA_INT_TYPE); | |
740 | vec = (IRA_INT_TYPE *) ira_allocate (size); | |
741 | memcpy ((char *) vec + added_head_nw * sizeof (IRA_INT_TYPE), | |
a49ae217 | 742 | OBJECT_CONFLICT_ARRAY (obj1), nw * sizeof (IRA_INT_TYPE)); |
058e97ec VM |
743 | memset (vec, 0, added_head_nw * sizeof (IRA_INT_TYPE)); |
744 | memset ((char *) vec | |
745 | + (nw + added_head_nw) * sizeof (IRA_INT_TYPE), | |
746 | 0, size - (nw + added_head_nw) * sizeof (IRA_INT_TYPE)); | |
a49ae217 BS |
747 | ira_free (OBJECT_CONFLICT_ARRAY (obj1)); |
748 | OBJECT_CONFLICT_ARRAY (obj1) = vec; | |
749 | OBJECT_CONFLICT_ARRAY_SIZE (obj1) = size; | |
058e97ec | 750 | } |
a49ae217 | 751 | OBJECT_MIN (obj1) -= added_head_nw * IRA_INT_BITS; |
058e97ec | 752 | } |
a49ae217 | 753 | else if (OBJECT_MAX (obj1) < id) |
058e97ec | 754 | { |
a49ae217 | 755 | nw = (id - OBJECT_MIN (obj1)) / IRA_INT_BITS + 1; |
058e97ec | 756 | size = nw * sizeof (IRA_INT_TYPE); |
a49ae217 | 757 | if (OBJECT_CONFLICT_ARRAY_SIZE (obj1) < size) |
058e97ec VM |
758 | { |
759 | /* Expand tail of the bit vector. */ | |
760 | size = (3 * nw / 2 + 1) * sizeof (IRA_INT_TYPE); | |
761 | vec = (IRA_INT_TYPE *) ira_allocate (size); | |
a49ae217 BS |
762 | memcpy (vec, OBJECT_CONFLICT_ARRAY (obj1), OBJECT_CONFLICT_ARRAY_SIZE (obj1)); |
763 | memset ((char *) vec + OBJECT_CONFLICT_ARRAY_SIZE (obj1), | |
764 | 0, size - OBJECT_CONFLICT_ARRAY_SIZE (obj1)); | |
765 | ira_free (OBJECT_CONFLICT_ARRAY (obj1)); | |
766 | OBJECT_CONFLICT_ARRAY (obj1) = vec; | |
767 | OBJECT_CONFLICT_ARRAY_SIZE (obj1) = size; | |
058e97ec | 768 | } |
a49ae217 | 769 | OBJECT_MAX (obj1) = id; |
058e97ec | 770 | } |
a49ae217 | 771 | SET_MINMAX_SET_BIT (vec, id, OBJECT_MIN (obj1), OBJECT_MAX (obj1)); |
058e97ec VM |
772 | } |
773 | } | |
774 | ||
a49ae217 BS |
775 | /* Add OBJ1 to the conflicts of OBJ2 and vice versa. */ |
776 | static void | |
777 | ira_add_conflict (ira_object_t obj1, ira_object_t obj2) | |
058e97ec | 778 | { |
a49ae217 BS |
779 | add_to_conflicts (obj1, obj2); |
780 | add_to_conflicts (obj2, obj1); | |
058e97ec VM |
781 | } |
782 | ||
a49ae217 | 783 | /* Clear all conflicts of OBJ. */ |
058e97ec | 784 | static void |
a49ae217 | 785 | clear_conflicts (ira_object_t obj) |
058e97ec | 786 | { |
a49ae217 | 787 | if (OBJECT_CONFLICT_VEC_P (obj)) |
058e97ec | 788 | { |
a49ae217 BS |
789 | OBJECT_NUM_CONFLICTS (obj) = 0; |
790 | OBJECT_CONFLICT_VEC (obj)[0] = NULL; | |
058e97ec | 791 | } |
a49ae217 | 792 | else if (OBJECT_CONFLICT_ARRAY_SIZE (obj) != 0) |
058e97ec VM |
793 | { |
794 | int nw; | |
795 | ||
a49ae217 BS |
796 | nw = (OBJECT_MAX (obj) - OBJECT_MIN (obj)) / IRA_INT_BITS + 1; |
797 | memset (OBJECT_CONFLICT_BITVEC (obj), 0, nw * sizeof (IRA_INT_TYPE)); | |
058e97ec VM |
798 | } |
799 | } | |
800 | ||
801 | /* The array used to find duplications in conflict vectors of | |
802 | allocnos. */ | |
a49ae217 | 803 | static int *conflict_check; |
058e97ec VM |
804 | |
805 | /* The value used to mark allocation presence in conflict vector of | |
806 | the current allocno. */ | |
a49ae217 | 807 | static int curr_conflict_check_tick; |
058e97ec | 808 | |
a49ae217 | 809 | /* Remove duplications in conflict vector of OBJ. */ |
058e97ec | 810 | static void |
a49ae217 | 811 | compress_conflict_vec (ira_object_t obj) |
058e97ec | 812 | { |
a49ae217 | 813 | ira_object_t *vec, conflict_obj; |
058e97ec VM |
814 | int i, j; |
815 | ||
a49ae217 BS |
816 | ira_assert (OBJECT_CONFLICT_VEC_P (obj)); |
817 | vec = OBJECT_CONFLICT_VEC (obj); | |
818 | curr_conflict_check_tick++; | |
819 | for (i = j = 0; (conflict_obj = vec[i]) != NULL; i++) | |
058e97ec | 820 | { |
a49ae217 BS |
821 | int id = OBJECT_CONFLICT_ID (conflict_obj); |
822 | if (conflict_check[id] != curr_conflict_check_tick) | |
058e97ec | 823 | { |
a49ae217 BS |
824 | conflict_check[id] = curr_conflict_check_tick; |
825 | vec[j++] = conflict_obj; | |
058e97ec VM |
826 | } |
827 | } | |
a49ae217 | 828 | OBJECT_NUM_CONFLICTS (obj) = j; |
058e97ec VM |
829 | vec[j] = NULL; |
830 | } | |
831 | ||
832 | /* Remove duplications in conflict vectors of all allocnos. */ | |
833 | static void | |
834 | compress_conflict_vecs (void) | |
835 | { | |
ac0ab4f7 BS |
836 | ira_object_t obj; |
837 | ira_object_iterator oi; | |
058e97ec | 838 | |
a49ae217 BS |
839 | conflict_check = (int *) ira_allocate (sizeof (int) * ira_objects_num); |
840 | memset (conflict_check, 0, sizeof (int) * ira_objects_num); | |
841 | curr_conflict_check_tick = 0; | |
ac0ab4f7 | 842 | FOR_EACH_OBJECT (obj, oi) |
a49ae217 | 843 | { |
a49ae217 BS |
844 | if (OBJECT_CONFLICT_VEC_P (obj)) |
845 | compress_conflict_vec (obj); | |
846 | } | |
847 | ira_free (conflict_check); | |
058e97ec VM |
848 | } |
849 | ||
850 | /* This recursive function outputs allocno A and if it is a cap the | |
851 | function outputs its members. */ | |
852 | void | |
853 | ira_print_expanded_allocno (ira_allocno_t a) | |
854 | { | |
855 | basic_block bb; | |
856 | ||
857 | fprintf (ira_dump_file, " a%d(r%d", ALLOCNO_NUM (a), ALLOCNO_REGNO (a)); | |
858 | if ((bb = ALLOCNO_LOOP_TREE_NODE (a)->bb) != NULL) | |
859 | fprintf (ira_dump_file, ",b%d", bb->index); | |
860 | else | |
2608d841 | 861 | fprintf (ira_dump_file, ",l%d", ALLOCNO_LOOP_TREE_NODE (a)->loop_num); |
058e97ec VM |
862 | if (ALLOCNO_CAP_MEMBER (a) != NULL) |
863 | { | |
864 | fprintf (ira_dump_file, ":"); | |
865 | ira_print_expanded_allocno (ALLOCNO_CAP_MEMBER (a)); | |
866 | } | |
867 | fprintf (ira_dump_file, ")"); | |
868 | } | |
869 | ||
870 | /* Create and return the cap representing allocno A in the | |
871 | parent loop. */ | |
872 | static ira_allocno_t | |
873 | create_cap_allocno (ira_allocno_t a) | |
874 | { | |
875 | ira_allocno_t cap; | |
876 | ira_loop_tree_node_t parent; | |
1756cb66 | 877 | enum reg_class aclass; |
058e97ec | 878 | |
058e97ec VM |
879 | parent = ALLOCNO_LOOP_TREE_NODE (a)->parent; |
880 | cap = ira_create_allocno (ALLOCNO_REGNO (a), true, parent); | |
881 | ALLOCNO_MODE (cap) = ALLOCNO_MODE (a); | |
d1bb282e | 882 | ALLOCNO_WMODE (cap) = ALLOCNO_WMODE (a); |
1756cb66 VM |
883 | aclass = ALLOCNO_CLASS (a); |
884 | ira_set_allocno_class (cap, aclass); | |
ac0ab4f7 | 885 | ira_create_allocno_objects (cap); |
058e97ec | 886 | ALLOCNO_CAP_MEMBER (cap) = a; |
058e97ec | 887 | ALLOCNO_CAP (a) = cap; |
1756cb66 | 888 | ALLOCNO_CLASS_COST (cap) = ALLOCNO_CLASS_COST (a); |
058e97ec | 889 | ALLOCNO_MEMORY_COST (cap) = ALLOCNO_MEMORY_COST (a); |
058e97ec | 890 | ira_allocate_and_copy_costs |
1756cb66 | 891 | (&ALLOCNO_HARD_REG_COSTS (cap), aclass, ALLOCNO_HARD_REG_COSTS (a)); |
058e97ec | 892 | ira_allocate_and_copy_costs |
1756cb66 | 893 | (&ALLOCNO_CONFLICT_HARD_REG_COSTS (cap), aclass, |
058e97ec | 894 | ALLOCNO_CONFLICT_HARD_REG_COSTS (a)); |
927425df | 895 | ALLOCNO_BAD_SPILL_P (cap) = ALLOCNO_BAD_SPILL_P (a); |
058e97ec VM |
896 | ALLOCNO_NREFS (cap) = ALLOCNO_NREFS (a); |
897 | ALLOCNO_FREQ (cap) = ALLOCNO_FREQ (a); | |
898 | ALLOCNO_CALL_FREQ (cap) = ALLOCNO_CALL_FREQ (a); | |
ac0ab4f7 | 899 | |
3c55880a | 900 | merge_hard_reg_conflicts (a, cap, false); |
ac0ab4f7 | 901 | |
058e97ec | 902 | ALLOCNO_CALLS_CROSSED_NUM (cap) = ALLOCNO_CALLS_CROSSED_NUM (a); |
e384e6b5 | 903 | ALLOCNO_CHEAP_CALLS_CROSSED_NUM (cap) = ALLOCNO_CHEAP_CALLS_CROSSED_NUM (a); |
6c476222 | 904 | ALLOCNO_CROSSED_CALLS_ABIS (cap) = ALLOCNO_CROSSED_CALLS_ABIS (a); |
44942965 | 905 | ALLOCNO_CROSSED_CALLS_CLOBBERED_REGS (cap) |
6c476222 | 906 | = ALLOCNO_CROSSED_CALLS_CLOBBERED_REGS (a); |
058e97ec VM |
907 | if (internal_flag_ira_verbose > 2 && ira_dump_file != NULL) |
908 | { | |
909 | fprintf (ira_dump_file, " Creating cap "); | |
910 | ira_print_expanded_allocno (cap); | |
911 | fprintf (ira_dump_file, "\n"); | |
912 | } | |
913 | return cap; | |
914 | } | |
915 | ||
ac0ab4f7 | 916 | /* Create and return a live range for OBJECT with given attributes. */ |
b14151b5 | 917 | live_range_t |
9140d27b BS |
918 | ira_create_live_range (ira_object_t obj, int start, int finish, |
919 | live_range_t next) | |
058e97ec | 920 | { |
b14151b5 | 921 | live_range_t p; |
058e97ec | 922 | |
0b470bae | 923 | p = live_range_pool.allocate (); |
9140d27b | 924 | p->object = obj; |
058e97ec VM |
925 | p->start = start; |
926 | p->finish = finish; | |
927 | p->next = next; | |
928 | return p; | |
929 | } | |
930 | ||
ac0ab4f7 BS |
931 | /* Create a new live range for OBJECT and queue it at the head of its |
932 | live range list. */ | |
933 | void | |
934 | ira_add_live_range_to_object (ira_object_t object, int start, int finish) | |
935 | { | |
936 | live_range_t p; | |
937 | p = ira_create_live_range (object, start, finish, | |
938 | OBJECT_LIVE_RANGES (object)); | |
939 | OBJECT_LIVE_RANGES (object) = p; | |
940 | } | |
941 | ||
058e97ec | 942 | /* Copy allocno live range R and return the result. */ |
b14151b5 | 943 | static live_range_t |
9140d27b | 944 | copy_live_range (live_range_t r) |
058e97ec | 945 | { |
b14151b5 | 946 | live_range_t p; |
058e97ec | 947 | |
0b470bae | 948 | p = live_range_pool.allocate (); |
058e97ec VM |
949 | *p = *r; |
950 | return p; | |
951 | } | |
952 | ||
953 | /* Copy allocno live range list given by its head R and return the | |
954 | result. */ | |
b14151b5 | 955 | live_range_t |
9140d27b | 956 | ira_copy_live_range_list (live_range_t r) |
058e97ec | 957 | { |
b14151b5 | 958 | live_range_t p, first, last; |
058e97ec VM |
959 | |
960 | if (r == NULL) | |
961 | return NULL; | |
962 | for (first = last = NULL; r != NULL; r = r->next) | |
963 | { | |
9140d27b | 964 | p = copy_live_range (r); |
058e97ec VM |
965 | if (first == NULL) |
966 | first = p; | |
967 | else | |
968 | last->next = p; | |
969 | last = p; | |
970 | } | |
971 | return first; | |
972 | } | |
973 | ||
3553f0bb VM |
974 | /* Merge ranges R1 and R2 and returns the result. The function |
975 | maintains the order of ranges and tries to minimize number of the | |
976 | result ranges. */ | |
b14151b5 | 977 | live_range_t |
9140d27b | 978 | ira_merge_live_ranges (live_range_t r1, live_range_t r2) |
3553f0bb | 979 | { |
fab27f52 | 980 | live_range_t first, last; |
3553f0bb VM |
981 | |
982 | if (r1 == NULL) | |
983 | return r2; | |
984 | if (r2 == NULL) | |
985 | return r1; | |
986 | for (first = last = NULL; r1 != NULL && r2 != NULL;) | |
987 | { | |
988 | if (r1->start < r2->start) | |
fab27f52 | 989 | std::swap (r1, r2); |
3553f0bb VM |
990 | if (r1->start <= r2->finish + 1) |
991 | { | |
992 | /* Intersected ranges: merge r1 and r2 into r1. */ | |
993 | r1->start = r2->start; | |
994 | if (r1->finish < r2->finish) | |
995 | r1->finish = r2->finish; | |
fab27f52 | 996 | live_range_t temp = r2; |
3553f0bb | 997 | r2 = r2->next; |
9140d27b | 998 | ira_finish_live_range (temp); |
3553f0bb VM |
999 | if (r2 == NULL) |
1000 | { | |
1001 | /* To try to merge with subsequent ranges in r1. */ | |
1002 | r2 = r1->next; | |
1003 | r1->next = NULL; | |
1004 | } | |
1005 | } | |
1006 | else | |
1007 | { | |
1008 | /* Add r1 to the result. */ | |
1009 | if (first == NULL) | |
1010 | first = last = r1; | |
1011 | else | |
1012 | { | |
1013 | last->next = r1; | |
1014 | last = r1; | |
1015 | } | |
1016 | r1 = r1->next; | |
1017 | if (r1 == NULL) | |
1018 | { | |
1019 | /* To try to merge with subsequent ranges in r2. */ | |
1020 | r1 = r2->next; | |
1021 | r2->next = NULL; | |
1022 | } | |
1023 | } | |
1024 | } | |
1025 | if (r1 != NULL) | |
1026 | { | |
1027 | if (first == NULL) | |
1028 | first = r1; | |
1029 | else | |
1030 | last->next = r1; | |
1031 | ira_assert (r1->next == NULL); | |
1032 | } | |
1033 | else if (r2 != NULL) | |
1034 | { | |
1035 | if (first == NULL) | |
1036 | first = r2; | |
1037 | else | |
1038 | last->next = r2; | |
1039 | ira_assert (r2->next == NULL); | |
1040 | } | |
1041 | else | |
1042 | { | |
1043 | ira_assert (last->next == NULL); | |
1044 | } | |
1045 | return first; | |
1046 | } | |
1047 | ||
1048 | /* Return TRUE if live ranges R1 and R2 intersect. */ | |
1049 | bool | |
9140d27b | 1050 | ira_live_ranges_intersect_p (live_range_t r1, live_range_t r2) |
3553f0bb VM |
1051 | { |
1052 | /* Remember the live ranges are always kept ordered. */ | |
1053 | while (r1 != NULL && r2 != NULL) | |
1054 | { | |
1055 | if (r1->start > r2->finish) | |
1056 | r1 = r1->next; | |
1057 | else if (r2->start > r1->finish) | |
1058 | r2 = r2->next; | |
1059 | else | |
1060 | return true; | |
1061 | } | |
1062 | return false; | |
1063 | } | |
1064 | ||
058e97ec VM |
1065 | /* Free allocno live range R. */ |
1066 | void | |
9140d27b | 1067 | ira_finish_live_range (live_range_t r) |
058e97ec | 1068 | { |
0b470bae | 1069 | live_range_pool.remove (r); |
058e97ec VM |
1070 | } |
1071 | ||
3553f0bb VM |
1072 | /* Free list of allocno live ranges starting with R. */ |
1073 | void | |
9140d27b | 1074 | ira_finish_live_range_list (live_range_t r) |
3553f0bb | 1075 | { |
b14151b5 | 1076 | live_range_t next_r; |
3553f0bb VM |
1077 | |
1078 | for (; r != NULL; r = next_r) | |
1079 | { | |
1080 | next_r = r->next; | |
9140d27b | 1081 | ira_finish_live_range (r); |
3553f0bb VM |
1082 | } |
1083 | } | |
1084 | ||
058e97ec VM |
1085 | /* Free updated register costs of allocno A. */ |
1086 | void | |
1087 | ira_free_allocno_updated_costs (ira_allocno_t a) | |
1088 | { | |
1756cb66 | 1089 | enum reg_class aclass; |
058e97ec | 1090 | |
1756cb66 | 1091 | aclass = ALLOCNO_CLASS (a); |
058e97ec | 1092 | if (ALLOCNO_UPDATED_HARD_REG_COSTS (a) != NULL) |
1756cb66 | 1093 | ira_free_cost_vector (ALLOCNO_UPDATED_HARD_REG_COSTS (a), aclass); |
058e97ec VM |
1094 | ALLOCNO_UPDATED_HARD_REG_COSTS (a) = NULL; |
1095 | if (ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a) != NULL) | |
1096 | ira_free_cost_vector (ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a), | |
1756cb66 | 1097 | aclass); |
058e97ec VM |
1098 | ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a) = NULL; |
1099 | } | |
1100 | ||
1756cb66 VM |
1101 | /* Free and nullify all cost vectors allocated earlier for allocno |
1102 | A. */ | |
058e97ec | 1103 | static void |
1756cb66 | 1104 | ira_free_allocno_costs (ira_allocno_t a) |
058e97ec | 1105 | { |
1756cb66 | 1106 | enum reg_class aclass = ALLOCNO_CLASS (a); |
ac0ab4f7 BS |
1107 | ira_object_t obj; |
1108 | ira_allocno_object_iterator oi; | |
058e97ec | 1109 | |
ac0ab4f7 BS |
1110 | FOR_EACH_ALLOCNO_OBJECT (a, obj, oi) |
1111 | { | |
1112 | ira_finish_live_range_list (OBJECT_LIVE_RANGES (obj)); | |
1113 | ira_object_id_map[OBJECT_CONFLICT_ID (obj)] = NULL; | |
1114 | if (OBJECT_CONFLICT_ARRAY (obj) != NULL) | |
1115 | ira_free (OBJECT_CONFLICT_ARRAY (obj)); | |
0b470bae | 1116 | object_pool.remove (obj); |
ac0ab4f7 | 1117 | } |
9140d27b | 1118 | |
058e97ec | 1119 | ira_allocnos[ALLOCNO_NUM (a)] = NULL; |
058e97ec | 1120 | if (ALLOCNO_HARD_REG_COSTS (a) != NULL) |
1756cb66 | 1121 | ira_free_cost_vector (ALLOCNO_HARD_REG_COSTS (a), aclass); |
058e97ec | 1122 | if (ALLOCNO_CONFLICT_HARD_REG_COSTS (a) != NULL) |
1756cb66 | 1123 | ira_free_cost_vector (ALLOCNO_CONFLICT_HARD_REG_COSTS (a), aclass); |
058e97ec | 1124 | if (ALLOCNO_UPDATED_HARD_REG_COSTS (a) != NULL) |
1756cb66 | 1125 | ira_free_cost_vector (ALLOCNO_UPDATED_HARD_REG_COSTS (a), aclass); |
058e97ec VM |
1126 | if (ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a) != NULL) |
1127 | ira_free_cost_vector (ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a), | |
1756cb66 VM |
1128 | aclass); |
1129 | ALLOCNO_HARD_REG_COSTS (a) = NULL; | |
1130 | ALLOCNO_CONFLICT_HARD_REG_COSTS (a) = NULL; | |
1131 | ALLOCNO_UPDATED_HARD_REG_COSTS (a) = NULL; | |
1132 | ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a) = NULL; | |
1133 | } | |
1134 | ||
1135 | /* Free the memory allocated for allocno A. */ | |
1136 | static void | |
1137 | finish_allocno (ira_allocno_t a) | |
1138 | { | |
1139 | ira_free_allocno_costs (a); | |
0b470bae | 1140 | allocno_pool.remove (a); |
058e97ec VM |
1141 | } |
1142 | ||
1143 | /* Free the memory allocated for all allocnos. */ | |
1144 | static void | |
1145 | finish_allocnos (void) | |
1146 | { | |
1147 | ira_allocno_t a; | |
1148 | ira_allocno_iterator ai; | |
1149 | ||
1150 | FOR_EACH_ALLOCNO (a, ai) | |
1151 | finish_allocno (a); | |
1152 | ira_free (ira_regno_allocno_map); | |
9771b263 DN |
1153 | ira_object_id_map_vec.release (); |
1154 | allocno_vec.release (); | |
0b470bae ML |
1155 | allocno_pool.release (); |
1156 | object_pool.release (); | |
1157 | live_range_pool.release (); | |
058e97ec VM |
1158 | } |
1159 | ||
1160 | \f | |
1161 | ||
3b6d1699 | 1162 | /* Pools for allocno preferences. */ |
fcb87c50 | 1163 | static object_allocator <ira_allocno_pref> pref_pool ("prefs"); |
3b6d1699 VM |
1164 | |
1165 | /* Vec containing references to all created preferences. It is a | |
1166 | container of array ira_prefs. */ | |
1167 | static vec<ira_pref_t> pref_vec; | |
1168 | ||
1169 | /* The function initializes data concerning allocno prefs. */ | |
1170 | static void | |
1171 | initiate_prefs (void) | |
1172 | { | |
3b6d1699 VM |
1173 | pref_vec.create (get_max_uid ()); |
1174 | ira_prefs = NULL; | |
1175 | ira_prefs_num = 0; | |
1176 | } | |
1177 | ||
1178 | /* Return pref for A and HARD_REGNO if any. */ | |
1179 | static ira_pref_t | |
1180 | find_allocno_pref (ira_allocno_t a, int hard_regno) | |
1181 | { | |
1182 | ira_pref_t pref; | |
1183 | ||
1184 | for (pref = ALLOCNO_PREFS (a); pref != NULL; pref = pref->next_pref) | |
1185 | if (pref->allocno == a && pref->hard_regno == hard_regno) | |
1186 | return pref; | |
1187 | return NULL; | |
1188 | } | |
1189 | ||
1190 | /* Create and return pref with given attributes A, HARD_REGNO, and FREQ. */ | |
1191 | ira_pref_t | |
1192 | ira_create_pref (ira_allocno_t a, int hard_regno, int freq) | |
1193 | { | |
1194 | ira_pref_t pref; | |
1195 | ||
0b470bae | 1196 | pref = pref_pool.allocate (); |
3b6d1699 VM |
1197 | pref->num = ira_prefs_num; |
1198 | pref->allocno = a; | |
1199 | pref->hard_regno = hard_regno; | |
1200 | pref->freq = freq; | |
1201 | pref_vec.safe_push (pref); | |
1202 | ira_prefs = pref_vec.address (); | |
1203 | ira_prefs_num = pref_vec.length (); | |
1204 | return pref; | |
1205 | } | |
1206 | ||
df3e3493 | 1207 | /* Attach a pref PREF to the corresponding allocno. */ |
3b6d1699 VM |
1208 | static void |
1209 | add_allocno_pref_to_list (ira_pref_t pref) | |
1210 | { | |
1211 | ira_allocno_t a = pref->allocno; | |
1212 | ||
1213 | pref->next_pref = ALLOCNO_PREFS (a); | |
1214 | ALLOCNO_PREFS (a) = pref; | |
1215 | } | |
1216 | ||
1217 | /* Create (or update frequency if the pref already exists) the pref of | |
1218 | allocnos A preferring HARD_REGNO with frequency FREQ. */ | |
1219 | void | |
1220 | ira_add_allocno_pref (ira_allocno_t a, int hard_regno, int freq) | |
1221 | { | |
1222 | ira_pref_t pref; | |
1223 | ||
1224 | if (freq <= 0) | |
1225 | return; | |
1226 | if ((pref = find_allocno_pref (a, hard_regno)) != NULL) | |
1227 | { | |
1228 | pref->freq += freq; | |
1229 | return; | |
1230 | } | |
1231 | pref = ira_create_pref (a, hard_regno, freq); | |
1232 | ira_assert (a != NULL); | |
1233 | add_allocno_pref_to_list (pref); | |
1234 | } | |
1235 | ||
1236 | /* Print info about PREF into file F. */ | |
1237 | static void | |
1238 | print_pref (FILE *f, ira_pref_t pref) | |
1239 | { | |
1240 | fprintf (f, " pref%d:a%d(r%d)<-hr%d@%d\n", pref->num, | |
1241 | ALLOCNO_NUM (pref->allocno), ALLOCNO_REGNO (pref->allocno), | |
1242 | pref->hard_regno, pref->freq); | |
1243 | } | |
1244 | ||
1245 | /* Print info about PREF into stderr. */ | |
1246 | void | |
1247 | ira_debug_pref (ira_pref_t pref) | |
1248 | { | |
1249 | print_pref (stderr, pref); | |
1250 | } | |
1251 | ||
1252 | /* Print info about all prefs into file F. */ | |
1253 | static void | |
1254 | print_prefs (FILE *f) | |
1255 | { | |
1256 | ira_pref_t pref; | |
1257 | ira_pref_iterator pi; | |
1258 | ||
1259 | FOR_EACH_PREF (pref, pi) | |
1260 | print_pref (f, pref); | |
1261 | } | |
1262 | ||
1263 | /* Print info about all prefs into stderr. */ | |
1264 | void | |
1265 | ira_debug_prefs (void) | |
1266 | { | |
1267 | print_prefs (stderr); | |
1268 | } | |
1269 | ||
1270 | /* Print info about prefs involving allocno A into file F. */ | |
1271 | static void | |
1272 | print_allocno_prefs (FILE *f, ira_allocno_t a) | |
1273 | { | |
1274 | ira_pref_t pref; | |
1275 | ||
1276 | fprintf (f, " a%d(r%d):", ALLOCNO_NUM (a), ALLOCNO_REGNO (a)); | |
1277 | for (pref = ALLOCNO_PREFS (a); pref != NULL; pref = pref->next_pref) | |
1278 | fprintf (f, " pref%d:hr%d@%d", pref->num, pref->hard_regno, pref->freq); | |
1279 | fprintf (f, "\n"); | |
1280 | } | |
1281 | ||
1282 | /* Print info about prefs involving allocno A into stderr. */ | |
1283 | void | |
1284 | ira_debug_allocno_prefs (ira_allocno_t a) | |
1285 | { | |
1286 | print_allocno_prefs (stderr, a); | |
1287 | } | |
1288 | ||
1289 | /* The function frees memory allocated for PREF. */ | |
1290 | static void | |
1291 | finish_pref (ira_pref_t pref) | |
1292 | { | |
1293 | ira_prefs[pref->num] = NULL; | |
0b470bae | 1294 | pref_pool.remove (pref); |
3b6d1699 VM |
1295 | } |
1296 | ||
1297 | /* Remove PREF from the list of allocno prefs and free memory for | |
1298 | it. */ | |
1299 | void | |
1300 | ira_remove_pref (ira_pref_t pref) | |
1301 | { | |
1302 | ira_pref_t cpref, prev; | |
1303 | ||
1304 | if (internal_flag_ira_verbose > 1 && ira_dump_file != NULL) | |
1305 | fprintf (ira_dump_file, " Removing pref%d:hr%d@%d\n", | |
1306 | pref->num, pref->hard_regno, pref->freq); | |
1307 | for (prev = NULL, cpref = ALLOCNO_PREFS (pref->allocno); | |
1308 | cpref != NULL; | |
1309 | prev = cpref, cpref = cpref->next_pref) | |
1310 | if (cpref == pref) | |
1311 | break; | |
1312 | ira_assert (cpref != NULL); | |
1313 | if (prev == NULL) | |
1314 | ALLOCNO_PREFS (pref->allocno) = pref->next_pref; | |
1315 | else | |
1316 | prev->next_pref = pref->next_pref; | |
1317 | finish_pref (pref); | |
1318 | } | |
1319 | ||
1320 | /* Remove all prefs of allocno A. */ | |
1321 | void | |
1322 | ira_remove_allocno_prefs (ira_allocno_t a) | |
1323 | { | |
1324 | ira_pref_t pref, next_pref; | |
1325 | ||
1326 | for (pref = ALLOCNO_PREFS (a); pref != NULL; pref = next_pref) | |
1327 | { | |
1328 | next_pref = pref->next_pref; | |
1329 | finish_pref (pref); | |
1330 | } | |
1331 | ALLOCNO_PREFS (a) = NULL; | |
1332 | } | |
1333 | ||
1334 | /* Free memory allocated for all prefs. */ | |
1335 | static void | |
1336 | finish_prefs (void) | |
1337 | { | |
1338 | ira_pref_t pref; | |
1339 | ira_pref_iterator pi; | |
1340 | ||
1341 | FOR_EACH_PREF (pref, pi) | |
1342 | finish_pref (pref); | |
1343 | pref_vec.release (); | |
0b470bae | 1344 | pref_pool.release (); |
3b6d1699 VM |
1345 | } |
1346 | ||
1347 | \f | |
1348 | ||
058e97ec | 1349 | /* Pools for copies. */ |
fcb87c50 | 1350 | static object_allocator<ira_allocno_copy> copy_pool ("copies"); |
058e97ec VM |
1351 | |
1352 | /* Vec containing references to all created copies. It is a | |
1353 | container of array ira_copies. */ | |
9771b263 | 1354 | static vec<ira_copy_t> copy_vec; |
058e97ec VM |
1355 | |
1356 | /* The function initializes data concerning allocno copies. */ | |
1357 | static void | |
1358 | initiate_copies (void) | |
1359 | { | |
9771b263 | 1360 | copy_vec.create (get_max_uid ()); |
058e97ec VM |
1361 | ira_copies = NULL; |
1362 | ira_copies_num = 0; | |
1363 | } | |
1364 | ||
1365 | /* Return copy connecting A1 and A2 and originated from INSN of | |
1366 | LOOP_TREE_NODE if any. */ | |
1367 | static ira_copy_t | |
070a1983 | 1368 | find_allocno_copy (ira_allocno_t a1, ira_allocno_t a2, rtx_insn *insn, |
058e97ec VM |
1369 | ira_loop_tree_node_t loop_tree_node) |
1370 | { | |
1371 | ira_copy_t cp, next_cp; | |
1372 | ira_allocno_t another_a; | |
1373 | ||
1374 | for (cp = ALLOCNO_COPIES (a1); cp != NULL; cp = next_cp) | |
1375 | { | |
1376 | if (cp->first == a1) | |
1377 | { | |
1378 | next_cp = cp->next_first_allocno_copy; | |
1379 | another_a = cp->second; | |
1380 | } | |
1381 | else if (cp->second == a1) | |
1382 | { | |
1383 | next_cp = cp->next_second_allocno_copy; | |
1384 | another_a = cp->first; | |
1385 | } | |
1386 | else | |
1387 | gcc_unreachable (); | |
1388 | if (another_a == a2 && cp->insn == insn | |
1389 | && cp->loop_tree_node == loop_tree_node) | |
1390 | return cp; | |
1391 | } | |
1392 | return NULL; | |
1393 | } | |
1394 | ||
1395 | /* Create and return copy with given attributes LOOP_TREE_NODE, FIRST, | |
548a6322 | 1396 | SECOND, FREQ, CONSTRAINT_P, and INSN. */ |
058e97ec | 1397 | ira_copy_t |
548a6322 | 1398 | ira_create_copy (ira_allocno_t first, ira_allocno_t second, int freq, |
070a1983 | 1399 | bool constraint_p, rtx_insn *insn, |
058e97ec VM |
1400 | ira_loop_tree_node_t loop_tree_node) |
1401 | { | |
1402 | ira_copy_t cp; | |
1403 | ||
0b470bae | 1404 | cp = copy_pool.allocate (); |
058e97ec VM |
1405 | cp->num = ira_copies_num; |
1406 | cp->first = first; | |
1407 | cp->second = second; | |
1408 | cp->freq = freq; | |
548a6322 | 1409 | cp->constraint_p = constraint_p; |
058e97ec VM |
1410 | cp->insn = insn; |
1411 | cp->loop_tree_node = loop_tree_node; | |
9771b263 DN |
1412 | copy_vec.safe_push (cp); |
1413 | ira_copies = copy_vec.address (); | |
1414 | ira_copies_num = copy_vec.length (); | |
058e97ec VM |
1415 | return cp; |
1416 | } | |
1417 | ||
1418 | /* Attach a copy CP to allocnos involved into the copy. */ | |
3b6d1699 VM |
1419 | static void |
1420 | add_allocno_copy_to_list (ira_copy_t cp) | |
058e97ec VM |
1421 | { |
1422 | ira_allocno_t first = cp->first, second = cp->second; | |
1423 | ||
1424 | cp->prev_first_allocno_copy = NULL; | |
1425 | cp->prev_second_allocno_copy = NULL; | |
1426 | cp->next_first_allocno_copy = ALLOCNO_COPIES (first); | |
1427 | if (cp->next_first_allocno_copy != NULL) | |
1428 | { | |
1429 | if (cp->next_first_allocno_copy->first == first) | |
1430 | cp->next_first_allocno_copy->prev_first_allocno_copy = cp; | |
1431 | else | |
1432 | cp->next_first_allocno_copy->prev_second_allocno_copy = cp; | |
1433 | } | |
1434 | cp->next_second_allocno_copy = ALLOCNO_COPIES (second); | |
1435 | if (cp->next_second_allocno_copy != NULL) | |
1436 | { | |
1437 | if (cp->next_second_allocno_copy->second == second) | |
1438 | cp->next_second_allocno_copy->prev_second_allocno_copy = cp; | |
1439 | else | |
1440 | cp->next_second_allocno_copy->prev_first_allocno_copy = cp; | |
1441 | } | |
1442 | ALLOCNO_COPIES (first) = cp; | |
1443 | ALLOCNO_COPIES (second) = cp; | |
1444 | } | |
1445 | ||
058e97ec VM |
1446 | /* Make a copy CP a canonical copy where number of the |
1447 | first allocno is less than the second one. */ | |
3b6d1699 VM |
1448 | static void |
1449 | swap_allocno_copy_ends_if_necessary (ira_copy_t cp) | |
058e97ec | 1450 | { |
058e97ec VM |
1451 | if (ALLOCNO_NUM (cp->first) <= ALLOCNO_NUM (cp->second)) |
1452 | return; | |
1453 | ||
fab27f52 MM |
1454 | std::swap (cp->first, cp->second); |
1455 | std::swap (cp->prev_first_allocno_copy, cp->prev_second_allocno_copy); | |
1456 | std::swap (cp->next_first_allocno_copy, cp->next_second_allocno_copy); | |
058e97ec VM |
1457 | } |
1458 | ||
1459 | /* Create (or update frequency if the copy already exists) and return | |
1460 | the copy of allocnos FIRST and SECOND with frequency FREQ | |
1461 | corresponding to move insn INSN (if any) and originated from | |
1462 | LOOP_TREE_NODE. */ | |
1463 | ira_copy_t | |
1464 | ira_add_allocno_copy (ira_allocno_t first, ira_allocno_t second, int freq, | |
070a1983 | 1465 | bool constraint_p, rtx_insn *insn, |
548a6322 | 1466 | ira_loop_tree_node_t loop_tree_node) |
058e97ec VM |
1467 | { |
1468 | ira_copy_t cp; | |
1469 | ||
1470 | if ((cp = find_allocno_copy (first, second, insn, loop_tree_node)) != NULL) | |
1471 | { | |
1472 | cp->freq += freq; | |
1473 | return cp; | |
1474 | } | |
548a6322 VM |
1475 | cp = ira_create_copy (first, second, freq, constraint_p, insn, |
1476 | loop_tree_node); | |
058e97ec | 1477 | ira_assert (first != NULL && second != NULL); |
3b6d1699 VM |
1478 | add_allocno_copy_to_list (cp); |
1479 | swap_allocno_copy_ends_if_necessary (cp); | |
058e97ec VM |
1480 | return cp; |
1481 | } | |
1482 | ||
4cda38d5 VM |
1483 | /* Print info about copy CP into file F. */ |
1484 | static void | |
1485 | print_copy (FILE *f, ira_copy_t cp) | |
1486 | { | |
548a6322 | 1487 | fprintf (f, " cp%d:a%d(r%d)<->a%d(r%d)@%d:%s\n", cp->num, |
4cda38d5 | 1488 | ALLOCNO_NUM (cp->first), ALLOCNO_REGNO (cp->first), |
548a6322 VM |
1489 | ALLOCNO_NUM (cp->second), ALLOCNO_REGNO (cp->second), cp->freq, |
1490 | cp->insn != NULL | |
1491 | ? "move" : cp->constraint_p ? "constraint" : "shuffle"); | |
4cda38d5 VM |
1492 | } |
1493 | ||
7b3b6ae4 LC |
1494 | DEBUG_FUNCTION void |
1495 | debug (ira_allocno_copy &ref) | |
1496 | { | |
1497 | print_copy (stderr, &ref); | |
1498 | } | |
1499 | ||
1500 | DEBUG_FUNCTION void | |
1501 | debug (ira_allocno_copy *ptr) | |
1502 | { | |
1503 | if (ptr) | |
1504 | debug (*ptr); | |
1505 | else | |
1506 | fprintf (stderr, "<nil>\n"); | |
1507 | } | |
1508 | ||
4cda38d5 VM |
1509 | /* Print info about copy CP into stderr. */ |
1510 | void | |
1511 | ira_debug_copy (ira_copy_t cp) | |
1512 | { | |
1513 | print_copy (stderr, cp); | |
1514 | } | |
1515 | ||
1516 | /* Print info about all copies into file F. */ | |
1517 | static void | |
1518 | print_copies (FILE *f) | |
1519 | { | |
1520 | ira_copy_t cp; | |
1521 | ira_copy_iterator ci; | |
1522 | ||
1523 | FOR_EACH_COPY (cp, ci) | |
1524 | print_copy (f, cp); | |
1525 | } | |
1526 | ||
1527 | /* Print info about all copies into stderr. */ | |
1528 | void | |
1529 | ira_debug_copies (void) | |
1530 | { | |
1531 | print_copies (stderr); | |
1532 | } | |
1533 | ||
058e97ec VM |
1534 | /* Print info about copies involving allocno A into file F. */ |
1535 | static void | |
1536 | print_allocno_copies (FILE *f, ira_allocno_t a) | |
1537 | { | |
1538 | ira_allocno_t another_a; | |
1539 | ira_copy_t cp, next_cp; | |
1540 | ||
1541 | fprintf (f, " a%d(r%d):", ALLOCNO_NUM (a), ALLOCNO_REGNO (a)); | |
1542 | for (cp = ALLOCNO_COPIES (a); cp != NULL; cp = next_cp) | |
1543 | { | |
1544 | if (cp->first == a) | |
1545 | { | |
1546 | next_cp = cp->next_first_allocno_copy; | |
1547 | another_a = cp->second; | |
1548 | } | |
1549 | else if (cp->second == a) | |
1550 | { | |
1551 | next_cp = cp->next_second_allocno_copy; | |
1552 | another_a = cp->first; | |
1553 | } | |
1554 | else | |
1555 | gcc_unreachable (); | |
1556 | fprintf (f, " cp%d:a%d(r%d)@%d", cp->num, | |
1557 | ALLOCNO_NUM (another_a), ALLOCNO_REGNO (another_a), cp->freq); | |
1558 | } | |
1559 | fprintf (f, "\n"); | |
1560 | } | |
1561 | ||
7b3b6ae4 LC |
1562 | DEBUG_FUNCTION void |
1563 | debug (ira_allocno &ref) | |
1564 | { | |
1565 | print_allocno_copies (stderr, &ref); | |
1566 | } | |
1567 | ||
1568 | DEBUG_FUNCTION void | |
1569 | debug (ira_allocno *ptr) | |
1570 | { | |
1571 | if (ptr) | |
1572 | debug (*ptr); | |
1573 | else | |
1574 | fprintf (stderr, "<nil>\n"); | |
1575 | } | |
1576 | ||
1577 | ||
058e97ec VM |
1578 | /* Print info about copies involving allocno A into stderr. */ |
1579 | void | |
1580 | ira_debug_allocno_copies (ira_allocno_t a) | |
1581 | { | |
1582 | print_allocno_copies (stderr, a); | |
1583 | } | |
1584 | ||
1585 | /* The function frees memory allocated for copy CP. */ | |
1586 | static void | |
1587 | finish_copy (ira_copy_t cp) | |
1588 | { | |
0b470bae | 1589 | copy_pool.remove (cp); |
058e97ec VM |
1590 | } |
1591 | ||
1592 | ||
1593 | /* Free memory allocated for all copies. */ | |
1594 | static void | |
1595 | finish_copies (void) | |
1596 | { | |
1597 | ira_copy_t cp; | |
1598 | ira_copy_iterator ci; | |
1599 | ||
1600 | FOR_EACH_COPY (cp, ci) | |
1601 | finish_copy (cp); | |
9771b263 | 1602 | copy_vec.release (); |
0b470bae | 1603 | copy_pool.release (); |
058e97ec VM |
1604 | } |
1605 | ||
1606 | \f | |
1607 | ||
1756cb66 | 1608 | /* Pools for cost vectors. It is defined only for allocno classes. */ |
fb0b2914 | 1609 | static pool_allocator *cost_vector_pool[N_REG_CLASSES]; |
058e97ec VM |
1610 | |
1611 | /* The function initiates work with hard register cost vectors. It | |
1756cb66 | 1612 | creates allocation pool for each allocno class. */ |
058e97ec VM |
1613 | static void |
1614 | initiate_cost_vectors (void) | |
1615 | { | |
1616 | int i; | |
1756cb66 | 1617 | enum reg_class aclass; |
058e97ec | 1618 | |
1756cb66 | 1619 | for (i = 0; i < ira_allocno_classes_num; i++) |
058e97ec | 1620 | { |
1756cb66 | 1621 | aclass = ira_allocno_classes[i]; |
fb0b2914 | 1622 | cost_vector_pool[aclass] = new pool_allocator |
fcb87c50 | 1623 | ("cost vectors", sizeof (int) * (ira_class_hard_regs_num[aclass])); |
058e97ec VM |
1624 | } |
1625 | } | |
1626 | ||
1756cb66 | 1627 | /* Allocate and return a cost vector VEC for ACLASS. */ |
058e97ec | 1628 | int * |
6f76a878 | 1629 | ira_allocate_cost_vector (reg_class_t aclass) |
058e97ec | 1630 | { |
fb0b2914 | 1631 | return (int*) cost_vector_pool[(int) aclass]->allocate (); |
058e97ec VM |
1632 | } |
1633 | ||
1756cb66 | 1634 | /* Free a cost vector VEC for ACLASS. */ |
058e97ec | 1635 | void |
6f76a878 | 1636 | ira_free_cost_vector (int *vec, reg_class_t aclass) |
058e97ec VM |
1637 | { |
1638 | ira_assert (vec != NULL); | |
3599f64a | 1639 | cost_vector_pool[(int) aclass]->remove (vec); |
058e97ec VM |
1640 | } |
1641 | ||
1642 | /* Finish work with hard register cost vectors. Release allocation | |
1756cb66 | 1643 | pool for each allocno class. */ |
058e97ec VM |
1644 | static void |
1645 | finish_cost_vectors (void) | |
1646 | { | |
1647 | int i; | |
1756cb66 | 1648 | enum reg_class aclass; |
058e97ec | 1649 | |
1756cb66 | 1650 | for (i = 0; i < ira_allocno_classes_num; i++) |
058e97ec | 1651 | { |
1756cb66 | 1652 | aclass = ira_allocno_classes[i]; |
3599f64a | 1653 | delete cost_vector_pool[aclass]; |
058e97ec VM |
1654 | } |
1655 | } | |
1656 | ||
1657 | \f | |
1658 | ||
e6a7da82 SB |
1659 | /* Compute a post-ordering of the reverse control flow of the loop body |
1660 | designated by the children nodes of LOOP_NODE, whose body nodes in | |
1661 | pre-order are input as LOOP_PREORDER. Return a VEC with a post-order | |
1662 | of the reverse loop body. | |
1663 | ||
1664 | For the post-order of the reverse CFG, we visit the basic blocks in | |
1665 | LOOP_PREORDER array in the reverse order of where they appear. | |
1666 | This is important: We do not just want to compute a post-order of | |
1667 | the reverse CFG, we want to make a best-guess for a visiting order that | |
1668 | minimizes the number of chain elements per allocno live range. If the | |
1669 | blocks would be visited in a different order, we would still compute a | |
1670 | correct post-ordering but it would be less likely that two nodes | |
9c582551 | 1671 | connected by an edge in the CFG are neighbors in the topsort. */ |
e6a7da82 | 1672 | |
9771b263 | 1673 | static vec<ira_loop_tree_node_t> |
e6a7da82 | 1674 | ira_loop_tree_body_rev_postorder (ira_loop_tree_node_t loop_node ATTRIBUTE_UNUSED, |
9771b263 | 1675 | vec<ira_loop_tree_node_t> loop_preorder) |
e6a7da82 | 1676 | { |
6e1aa848 | 1677 | vec<ira_loop_tree_node_t> topsort_nodes = vNULL; |
e6a7da82 SB |
1678 | unsigned int n_loop_preorder; |
1679 | ||
9771b263 | 1680 | n_loop_preorder = loop_preorder.length (); |
e6a7da82 SB |
1681 | if (n_loop_preorder != 0) |
1682 | { | |
1683 | ira_loop_tree_node_t subloop_node; | |
1684 | unsigned int i; | |
ef062b13 | 1685 | auto_vec<ira_loop_tree_node_t> dfs_stack; |
e6a7da82 SB |
1686 | |
1687 | /* This is a bit of strange abuse of the BB_VISITED flag: We use | |
1688 | the flag to mark blocks we still have to visit to add them to | |
1689 | our post-order. Define an alias to avoid confusion. */ | |
1690 | #define BB_TO_VISIT BB_VISITED | |
1691 | ||
9771b263 | 1692 | FOR_EACH_VEC_ELT (loop_preorder, i, subloop_node) |
e6a7da82 SB |
1693 | { |
1694 | gcc_checking_assert (! (subloop_node->bb->flags & BB_TO_VISIT)); | |
1695 | subloop_node->bb->flags |= BB_TO_VISIT; | |
1696 | } | |
1697 | ||
9771b263 DN |
1698 | topsort_nodes.create (n_loop_preorder); |
1699 | dfs_stack.create (n_loop_preorder); | |
e6a7da82 | 1700 | |
9771b263 | 1701 | FOR_EACH_VEC_ELT_REVERSE (loop_preorder, i, subloop_node) |
e6a7da82 SB |
1702 | { |
1703 | if (! (subloop_node->bb->flags & BB_TO_VISIT)) | |
1704 | continue; | |
1705 | ||
1706 | subloop_node->bb->flags &= ~BB_TO_VISIT; | |
9771b263 DN |
1707 | dfs_stack.quick_push (subloop_node); |
1708 | while (! dfs_stack.is_empty ()) | |
e6a7da82 SB |
1709 | { |
1710 | edge e; | |
1711 | edge_iterator ei; | |
1712 | ||
9771b263 | 1713 | ira_loop_tree_node_t n = dfs_stack.last (); |
e6a7da82 SB |
1714 | FOR_EACH_EDGE (e, ei, n->bb->preds) |
1715 | { | |
1716 | ira_loop_tree_node_t pred_node; | |
1717 | basic_block pred_bb = e->src; | |
1718 | ||
fefa31b5 | 1719 | if (e->src == ENTRY_BLOCK_PTR_FOR_FN (cfun)) |
e6a7da82 SB |
1720 | continue; |
1721 | ||
1722 | pred_node = IRA_BB_NODE_BY_INDEX (pred_bb->index); | |
1723 | if (pred_node != n | |
1724 | && (pred_node->bb->flags & BB_TO_VISIT)) | |
1725 | { | |
1726 | pred_node->bb->flags &= ~BB_TO_VISIT; | |
9771b263 | 1727 | dfs_stack.quick_push (pred_node); |
e6a7da82 SB |
1728 | } |
1729 | } | |
9771b263 | 1730 | if (n == dfs_stack.last ()) |
e6a7da82 | 1731 | { |
9771b263 DN |
1732 | dfs_stack.pop (); |
1733 | topsort_nodes.quick_push (n); | |
e6a7da82 SB |
1734 | } |
1735 | } | |
1736 | } | |
1737 | ||
1738 | #undef BB_TO_VISIT | |
e6a7da82 SB |
1739 | } |
1740 | ||
9771b263 | 1741 | gcc_assert (topsort_nodes.length () == n_loop_preorder); |
e6a7da82 SB |
1742 | return topsort_nodes; |
1743 | } | |
1744 | ||
058e97ec VM |
1745 | /* The current loop tree node and its regno allocno map. */ |
1746 | ira_loop_tree_node_t ira_curr_loop_tree_node; | |
1747 | ira_allocno_t *ira_curr_regno_allocno_map; | |
1748 | ||
1749 | /* This recursive function traverses loop tree with root LOOP_NODE | |
1750 | calling non-null functions PREORDER_FUNC and POSTORDER_FUNC | |
1751 | correspondingly in preorder and postorder. The function sets up | |
1752 | IRA_CURR_LOOP_TREE_NODE and IRA_CURR_REGNO_ALLOCNO_MAP. If BB_P, | |
1753 | basic block nodes of LOOP_NODE is also processed (before its | |
e6a7da82 SB |
1754 | subloop nodes). |
1755 | ||
1756 | If BB_P is set and POSTORDER_FUNC is given, the basic blocks in | |
1757 | the loop are passed in the *reverse* post-order of the *reverse* | |
1758 | CFG. This is only used by ira_create_allocno_live_ranges, which | |
1759 | wants to visit basic blocks in this order to minimize the number | |
1760 | of elements per live range chain. | |
1761 | Note that the loop tree nodes are still visited in the normal, | |
1762 | forward post-order of the loop tree. */ | |
1763 | ||
058e97ec VM |
1764 | void |
1765 | ira_traverse_loop_tree (bool bb_p, ira_loop_tree_node_t loop_node, | |
1766 | void (*preorder_func) (ira_loop_tree_node_t), | |
1767 | void (*postorder_func) (ira_loop_tree_node_t)) | |
1768 | { | |
1769 | ira_loop_tree_node_t subloop_node; | |
1770 | ||
1771 | ira_assert (loop_node->bb == NULL); | |
1772 | ira_curr_loop_tree_node = loop_node; | |
1773 | ira_curr_regno_allocno_map = ira_curr_loop_tree_node->regno_allocno_map; | |
1774 | ||
1775 | if (preorder_func != NULL) | |
1776 | (*preorder_func) (loop_node); | |
b8698a0f | 1777 | |
058e97ec | 1778 | if (bb_p) |
e6a7da82 | 1779 | { |
ef062b13 | 1780 | auto_vec<ira_loop_tree_node_t> loop_preorder; |
e6a7da82 SB |
1781 | unsigned int i; |
1782 | ||
1783 | /* Add all nodes to the set of nodes to visit. The IRA loop tree | |
1784 | is set up such that nodes in the loop body appear in a pre-order | |
1785 | of their place in the CFG. */ | |
1786 | for (subloop_node = loop_node->children; | |
1787 | subloop_node != NULL; | |
1788 | subloop_node = subloop_node->next) | |
1789 | if (subloop_node->bb != NULL) | |
9771b263 | 1790 | loop_preorder.safe_push (subloop_node); |
e6a7da82 SB |
1791 | |
1792 | if (preorder_func != NULL) | |
9771b263 | 1793 | FOR_EACH_VEC_ELT (loop_preorder, i, subloop_node) |
e6a7da82 SB |
1794 | (*preorder_func) (subloop_node); |
1795 | ||
1796 | if (postorder_func != NULL) | |
058e97ec | 1797 | { |
9771b263 | 1798 | vec<ira_loop_tree_node_t> loop_rev_postorder = |
e6a7da82 | 1799 | ira_loop_tree_body_rev_postorder (loop_node, loop_preorder); |
9771b263 | 1800 | FOR_EACH_VEC_ELT_REVERSE (loop_rev_postorder, i, subloop_node) |
058e97ec | 1801 | (*postorder_func) (subloop_node); |
9771b263 | 1802 | loop_rev_postorder.release (); |
058e97ec | 1803 | } |
e6a7da82 SB |
1804 | } |
1805 | ||
058e97ec VM |
1806 | for (subloop_node = loop_node->subloops; |
1807 | subloop_node != NULL; | |
1808 | subloop_node = subloop_node->subloop_next) | |
1809 | { | |
1810 | ira_assert (subloop_node->bb == NULL); | |
1811 | ira_traverse_loop_tree (bb_p, subloop_node, | |
1812 | preorder_func, postorder_func); | |
1813 | } | |
1814 | ||
1815 | ira_curr_loop_tree_node = loop_node; | |
1816 | ira_curr_regno_allocno_map = ira_curr_loop_tree_node->regno_allocno_map; | |
1817 | ||
1818 | if (postorder_func != NULL) | |
1819 | (*postorder_func) (loop_node); | |
1820 | } | |
1821 | ||
1822 | \f | |
1823 | ||
1824 | /* The basic block currently being processed. */ | |
1825 | static basic_block curr_bb; | |
1826 | ||
1827 | /* This recursive function creates allocnos corresponding to | |
1828 | pseudo-registers containing in X. True OUTPUT_P means that X is | |
d1bb282e | 1829 | an lvalue. PARENT corresponds to the parent expression of X. */ |
058e97ec | 1830 | static void |
d1bb282e | 1831 | create_insn_allocnos (rtx x, rtx outer, bool output_p) |
058e97ec VM |
1832 | { |
1833 | int i, j; | |
1834 | const char *fmt; | |
1835 | enum rtx_code code = GET_CODE (x); | |
1836 | ||
1837 | if (code == REG) | |
1838 | { | |
1839 | int regno; | |
1840 | ||
1841 | if ((regno = REGNO (x)) >= FIRST_PSEUDO_REGISTER) | |
1842 | { | |
1843 | ira_allocno_t a; | |
1844 | ||
1845 | if ((a = ira_curr_regno_allocno_map[regno]) == NULL) | |
d1bb282e DS |
1846 | { |
1847 | a = ira_create_allocno (regno, false, ira_curr_loop_tree_node); | |
1848 | if (outer != NULL && GET_CODE (outer) == SUBREG) | |
1849 | { | |
ef4bddc2 | 1850 | machine_mode wmode = GET_MODE (outer); |
bd4288c0 | 1851 | if (partial_subreg_p (ALLOCNO_WMODE (a), wmode)) |
d1bb282e DS |
1852 | ALLOCNO_WMODE (a) = wmode; |
1853 | } | |
1854 | } | |
b8698a0f | 1855 | |
058e97ec VM |
1856 | ALLOCNO_NREFS (a)++; |
1857 | ALLOCNO_FREQ (a) += REG_FREQ_FROM_BB (curr_bb); | |
058e97ec VM |
1858 | if (output_p) |
1859 | bitmap_set_bit (ira_curr_loop_tree_node->modified_regnos, regno); | |
1860 | } | |
1861 | return; | |
1862 | } | |
1863 | else if (code == SET) | |
1864 | { | |
d1bb282e DS |
1865 | create_insn_allocnos (SET_DEST (x), NULL, true); |
1866 | create_insn_allocnos (SET_SRC (x), NULL, false); | |
058e97ec VM |
1867 | return; |
1868 | } | |
1869 | else if (code == CLOBBER) | |
1870 | { | |
d1bb282e | 1871 | create_insn_allocnos (XEXP (x, 0), NULL, true); |
058e97ec VM |
1872 | return; |
1873 | } | |
1874 | else if (code == MEM) | |
1875 | { | |
d1bb282e | 1876 | create_insn_allocnos (XEXP (x, 0), NULL, false); |
058e97ec VM |
1877 | return; |
1878 | } | |
b8698a0f | 1879 | else if (code == PRE_DEC || code == POST_DEC || code == PRE_INC || |
058e97ec VM |
1880 | code == POST_INC || code == POST_MODIFY || code == PRE_MODIFY) |
1881 | { | |
d1bb282e DS |
1882 | create_insn_allocnos (XEXP (x, 0), NULL, true); |
1883 | create_insn_allocnos (XEXP (x, 0), NULL, false); | |
058e97ec VM |
1884 | return; |
1885 | } | |
1886 | ||
1887 | fmt = GET_RTX_FORMAT (code); | |
1888 | for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--) | |
1889 | { | |
1890 | if (fmt[i] == 'e') | |
d1bb282e | 1891 | create_insn_allocnos (XEXP (x, i), x, output_p); |
058e97ec VM |
1892 | else if (fmt[i] == 'E') |
1893 | for (j = 0; j < XVECLEN (x, i); j++) | |
d1bb282e | 1894 | create_insn_allocnos (XVECEXP (x, i, j), x, output_p); |
058e97ec VM |
1895 | } |
1896 | } | |
1897 | ||
1898 | /* Create allocnos corresponding to pseudo-registers living in the | |
1899 | basic block represented by the corresponding loop tree node | |
1900 | BB_NODE. */ | |
1901 | static void | |
1902 | create_bb_allocnos (ira_loop_tree_node_t bb_node) | |
1903 | { | |
1904 | basic_block bb; | |
070a1983 | 1905 | rtx_insn *insn; |
058e97ec VM |
1906 | unsigned int i; |
1907 | bitmap_iterator bi; | |
1908 | ||
1909 | curr_bb = bb = bb_node->bb; | |
1910 | ira_assert (bb != NULL); | |
acb37d29 | 1911 | FOR_BB_INSNS_REVERSE (bb, insn) |
b5b8b0ac | 1912 | if (NONDEBUG_INSN_P (insn)) |
d1bb282e | 1913 | create_insn_allocnos (PATTERN (insn), NULL, false); |
058e97ec VM |
1914 | /* It might be a allocno living through from one subloop to |
1915 | another. */ | |
bf744527 | 1916 | EXECUTE_IF_SET_IN_REG_SET (df_get_live_in (bb), FIRST_PSEUDO_REGISTER, i, bi) |
058e97ec VM |
1917 | if (ira_curr_regno_allocno_map[i] == NULL) |
1918 | ira_create_allocno (i, false, ira_curr_loop_tree_node); | |
1919 | } | |
1920 | ||
1921 | /* Create allocnos corresponding to pseudo-registers living on edge E | |
1922 | (a loop entry or exit). Also mark the allocnos as living on the | |
1923 | loop border. */ | |
1924 | static void | |
1925 | create_loop_allocnos (edge e) | |
1926 | { | |
1927 | unsigned int i; | |
1928 | bitmap live_in_regs, border_allocnos; | |
1929 | bitmap_iterator bi; | |
1930 | ira_loop_tree_node_t parent; | |
1931 | ||
bf744527 | 1932 | live_in_regs = df_get_live_in (e->dest); |
058e97ec | 1933 | border_allocnos = ira_curr_loop_tree_node->border_allocnos; |
bf744527 | 1934 | EXECUTE_IF_SET_IN_REG_SET (df_get_live_out (e->src), |
058e97ec VM |
1935 | FIRST_PSEUDO_REGISTER, i, bi) |
1936 | if (bitmap_bit_p (live_in_regs, i)) | |
1937 | { | |
1938 | if (ira_curr_regno_allocno_map[i] == NULL) | |
1939 | { | |
1940 | /* The order of creations is important for right | |
1941 | ira_regno_allocno_map. */ | |
1942 | if ((parent = ira_curr_loop_tree_node->parent) != NULL | |
1943 | && parent->regno_allocno_map[i] == NULL) | |
1944 | ira_create_allocno (i, false, parent); | |
1945 | ira_create_allocno (i, false, ira_curr_loop_tree_node); | |
1946 | } | |
1947 | bitmap_set_bit (border_allocnos, | |
1948 | ALLOCNO_NUM (ira_curr_regno_allocno_map[i])); | |
1949 | } | |
1950 | } | |
1951 | ||
1952 | /* Create allocnos corresponding to pseudo-registers living in loop | |
1953 | represented by the corresponding loop tree node LOOP_NODE. This | |
1954 | function is called by ira_traverse_loop_tree. */ | |
1955 | static void | |
1956 | create_loop_tree_node_allocnos (ira_loop_tree_node_t loop_node) | |
1957 | { | |
1958 | if (loop_node->bb != NULL) | |
1959 | create_bb_allocnos (loop_node); | |
1960 | else if (loop_node != ira_loop_tree_root) | |
1961 | { | |
1962 | int i; | |
1963 | edge_iterator ei; | |
1964 | edge e; | |
058e97ec | 1965 | |
2608d841 | 1966 | ira_assert (current_loops != NULL); |
058e97ec VM |
1967 | FOR_EACH_EDGE (e, ei, loop_node->loop->header->preds) |
1968 | if (e->src != loop_node->loop->latch) | |
1969 | create_loop_allocnos (e); | |
b8698a0f | 1970 | |
4b9d61f7 | 1971 | auto_vec<edge> edges = get_loop_exit_edges (loop_node->loop); |
9771b263 | 1972 | FOR_EACH_VEC_ELT (edges, i, e) |
058e97ec | 1973 | create_loop_allocnos (e); |
058e97ec VM |
1974 | } |
1975 | } | |
1976 | ||
1977 | /* Propagate information about allocnos modified inside the loop given | |
1978 | by its LOOP_TREE_NODE to its parent. */ | |
1979 | static void | |
1980 | propagate_modified_regnos (ira_loop_tree_node_t loop_tree_node) | |
1981 | { | |
1982 | if (loop_tree_node == ira_loop_tree_root) | |
1983 | return; | |
1984 | ira_assert (loop_tree_node->bb == NULL); | |
1985 | bitmap_ior_into (loop_tree_node->parent->modified_regnos, | |
1986 | loop_tree_node->modified_regnos); | |
1987 | } | |
1988 | ||
1989 | /* Propagate new info about allocno A (see comments about accumulated | |
1990 | info in allocno definition) to the corresponding allocno on upper | |
1991 | loop tree level. So allocnos on upper levels accumulate | |
1992 | information about the corresponding allocnos in nested regions. | |
1993 | The new info means allocno info finally calculated in this | |
1994 | file. */ | |
1995 | static void | |
1996 | propagate_allocno_info (void) | |
1997 | { | |
1998 | int i; | |
1999 | ira_allocno_t a, parent_a; | |
2000 | ira_loop_tree_node_t parent; | |
1756cb66 | 2001 | enum reg_class aclass; |
058e97ec | 2002 | |
7db7ed3c VM |
2003 | if (flag_ira_region != IRA_REGION_ALL |
2004 | && flag_ira_region != IRA_REGION_MIXED) | |
058e97ec VM |
2005 | return; |
2006 | for (i = max_reg_num () - 1; i >= FIRST_PSEUDO_REGISTER; i--) | |
2007 | for (a = ira_regno_allocno_map[i]; | |
2008 | a != NULL; | |
2009 | a = ALLOCNO_NEXT_REGNO_ALLOCNO (a)) | |
2010 | if ((parent = ALLOCNO_LOOP_TREE_NODE (a)->parent) != NULL | |
2011 | && (parent_a = parent->regno_allocno_map[i]) != NULL | |
2012 | /* There are no caps yet at this point. So use | |
2013 | border_allocnos to find allocnos for the propagation. */ | |
2014 | && bitmap_bit_p (ALLOCNO_LOOP_TREE_NODE (a)->border_allocnos, | |
2015 | ALLOCNO_NUM (a))) | |
2016 | { | |
927425df VM |
2017 | if (! ALLOCNO_BAD_SPILL_P (a)) |
2018 | ALLOCNO_BAD_SPILL_P (parent_a) = false; | |
058e97ec VM |
2019 | ALLOCNO_NREFS (parent_a) += ALLOCNO_NREFS (a); |
2020 | ALLOCNO_FREQ (parent_a) += ALLOCNO_FREQ (a); | |
2021 | ALLOCNO_CALL_FREQ (parent_a) += ALLOCNO_CALL_FREQ (a); | |
3c55880a | 2022 | merge_hard_reg_conflicts (a, parent_a, true); |
058e97ec VM |
2023 | ALLOCNO_CALLS_CROSSED_NUM (parent_a) |
2024 | += ALLOCNO_CALLS_CROSSED_NUM (a); | |
e384e6b5 BS |
2025 | ALLOCNO_CHEAP_CALLS_CROSSED_NUM (parent_a) |
2026 | += ALLOCNO_CHEAP_CALLS_CROSSED_NUM (a); | |
6c476222 RS |
2027 | ALLOCNO_CROSSED_CALLS_ABIS (parent_a) |
2028 | |= ALLOCNO_CROSSED_CALLS_ABIS (a); | |
44942965 RS |
2029 | ALLOCNO_CROSSED_CALLS_CLOBBERED_REGS (parent_a) |
2030 | |= ALLOCNO_CROSSED_CALLS_CLOBBERED_REGS (a); | |
058e97ec VM |
2031 | ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (parent_a) |
2032 | += ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (a); | |
1756cb66 VM |
2033 | aclass = ALLOCNO_CLASS (a); |
2034 | ira_assert (aclass == ALLOCNO_CLASS (parent_a)); | |
058e97ec | 2035 | ira_allocate_and_accumulate_costs |
1756cb66 | 2036 | (&ALLOCNO_HARD_REG_COSTS (parent_a), aclass, |
058e97ec VM |
2037 | ALLOCNO_HARD_REG_COSTS (a)); |
2038 | ira_allocate_and_accumulate_costs | |
2039 | (&ALLOCNO_CONFLICT_HARD_REG_COSTS (parent_a), | |
1756cb66 | 2040 | aclass, |
058e97ec | 2041 | ALLOCNO_CONFLICT_HARD_REG_COSTS (a)); |
1756cb66 VM |
2042 | ALLOCNO_CLASS_COST (parent_a) |
2043 | += ALLOCNO_CLASS_COST (a); | |
058e97ec | 2044 | ALLOCNO_MEMORY_COST (parent_a) += ALLOCNO_MEMORY_COST (a); |
058e97ec VM |
2045 | } |
2046 | } | |
2047 | ||
2048 | /* Create allocnos corresponding to pseudo-registers in the current | |
2049 | function. Traverse the loop tree for this. */ | |
2050 | static void | |
2051 | create_allocnos (void) | |
2052 | { | |
2053 | /* We need to process BB first to correctly link allocnos by member | |
2054 | next_regno_allocno. */ | |
2055 | ira_traverse_loop_tree (true, ira_loop_tree_root, | |
2056 | create_loop_tree_node_allocnos, NULL); | |
2057 | if (optimize) | |
2058 | ira_traverse_loop_tree (false, ira_loop_tree_root, NULL, | |
2059 | propagate_modified_regnos); | |
2060 | } | |
2061 | ||
2062 | \f | |
2063 | ||
2064 | /* The page contains function to remove some regions from a separate | |
2065 | register allocation. We remove regions whose separate allocation | |
2066 | will hardly improve the result. As a result we speed up regional | |
2067 | register allocation. */ | |
2068 | ||
9140d27b | 2069 | /* The function changes the object in range list given by R to OBJ. */ |
058e97ec | 2070 | static void |
9140d27b | 2071 | change_object_in_range_list (live_range_t r, ira_object_t obj) |
058e97ec VM |
2072 | { |
2073 | for (; r != NULL; r = r->next) | |
9140d27b | 2074 | r->object = obj; |
058e97ec VM |
2075 | } |
2076 | ||
3c55880a BS |
2077 | /* Move all live ranges associated with allocno FROM to allocno TO. */ |
2078 | static void | |
2079 | move_allocno_live_ranges (ira_allocno_t from, ira_allocno_t to) | |
2080 | { | |
ac0ab4f7 BS |
2081 | int i; |
2082 | int n = ALLOCNO_NUM_OBJECTS (from); | |
2083 | ||
2084 | gcc_assert (n == ALLOCNO_NUM_OBJECTS (to)); | |
3c55880a | 2085 | |
ac0ab4f7 | 2086 | for (i = 0; i < n; i++) |
3c55880a | 2087 | { |
ac0ab4f7 BS |
2088 | ira_object_t from_obj = ALLOCNO_OBJECT (from, i); |
2089 | ira_object_t to_obj = ALLOCNO_OBJECT (to, i); | |
2090 | live_range_t lr = OBJECT_LIVE_RANGES (from_obj); | |
2091 | ||
2092 | if (internal_flag_ira_verbose > 4 && ira_dump_file != NULL) | |
2093 | { | |
2094 | fprintf (ira_dump_file, | |
2095 | " Moving ranges of a%dr%d to a%dr%d: ", | |
2096 | ALLOCNO_NUM (from), ALLOCNO_REGNO (from), | |
2097 | ALLOCNO_NUM (to), ALLOCNO_REGNO (to)); | |
2098 | ira_print_live_range_list (ira_dump_file, lr); | |
2099 | } | |
2100 | change_object_in_range_list (lr, to_obj); | |
2101 | OBJECT_LIVE_RANGES (to_obj) | |
2102 | = ira_merge_live_ranges (lr, OBJECT_LIVE_RANGES (to_obj)); | |
2103 | OBJECT_LIVE_RANGES (from_obj) = NULL; | |
3c55880a | 2104 | } |
3c55880a BS |
2105 | } |
2106 | ||
3c55880a BS |
2107 | static void |
2108 | copy_allocno_live_ranges (ira_allocno_t from, ira_allocno_t to) | |
2109 | { | |
ac0ab4f7 BS |
2110 | int i; |
2111 | int n = ALLOCNO_NUM_OBJECTS (from); | |
3c55880a | 2112 | |
ac0ab4f7 BS |
2113 | gcc_assert (n == ALLOCNO_NUM_OBJECTS (to)); |
2114 | ||
2115 | for (i = 0; i < n; i++) | |
3c55880a | 2116 | { |
ac0ab4f7 BS |
2117 | ira_object_t from_obj = ALLOCNO_OBJECT (from, i); |
2118 | ira_object_t to_obj = ALLOCNO_OBJECT (to, i); | |
2119 | live_range_t lr = OBJECT_LIVE_RANGES (from_obj); | |
2120 | ||
2121 | if (internal_flag_ira_verbose > 4 && ira_dump_file != NULL) | |
2122 | { | |
2123 | fprintf (ira_dump_file, " Copying ranges of a%dr%d to a%dr%d: ", | |
2124 | ALLOCNO_NUM (from), ALLOCNO_REGNO (from), | |
2125 | ALLOCNO_NUM (to), ALLOCNO_REGNO (to)); | |
2126 | ira_print_live_range_list (ira_dump_file, lr); | |
2127 | } | |
2128 | lr = ira_copy_live_range_list (lr); | |
2129 | change_object_in_range_list (lr, to_obj); | |
2130 | OBJECT_LIVE_RANGES (to_obj) | |
2131 | = ira_merge_live_ranges (lr, OBJECT_LIVE_RANGES (to_obj)); | |
3c55880a | 2132 | } |
3c55880a BS |
2133 | } |
2134 | ||
058e97ec VM |
2135 | /* Return TRUE if NODE represents a loop with low register |
2136 | pressure. */ | |
2137 | static bool | |
2138 | low_pressure_loop_node_p (ira_loop_tree_node_t node) | |
2139 | { | |
2140 | int i; | |
1756cb66 | 2141 | enum reg_class pclass; |
b8698a0f | 2142 | |
058e97ec VM |
2143 | if (node->bb != NULL) |
2144 | return false; | |
b8698a0f | 2145 | |
1756cb66 | 2146 | for (i = 0; i < ira_pressure_classes_num; i++) |
058e97ec | 2147 | { |
1756cb66 | 2148 | pclass = ira_pressure_classes[i]; |
f508f827 RS |
2149 | if (node->reg_pressure[pclass] > ira_class_hard_regs_num[pclass] |
2150 | && ira_class_hard_regs_num[pclass] > 1) | |
058e97ec VM |
2151 | return false; |
2152 | } | |
2153 | return true; | |
2154 | } | |
2155 | ||
30a435d8 VM |
2156 | #ifdef STACK_REGS |
2157 | /* Return TRUE if LOOP has a complex enter or exit edge. We don't | |
2158 | form a region from such loop if the target use stack register | |
67914693 | 2159 | because reg-stack.c cannot deal with such edges. */ |
8c5fdaae | 2160 | static bool |
99b1c316 | 2161 | loop_with_complex_edge_p (class loop *loop) |
8c5fdaae VM |
2162 | { |
2163 | int i; | |
2164 | edge_iterator ei; | |
2165 | edge e; | |
f5843d08 | 2166 | bool res; |
8c5fdaae VM |
2167 | |
2168 | FOR_EACH_EDGE (e, ei, loop->header->preds) | |
2169 | if (e->flags & EDGE_EH) | |
2170 | return true; | |
4b9d61f7 | 2171 | auto_vec<edge> edges = get_loop_exit_edges (loop); |
f5843d08 | 2172 | res = false; |
9771b263 | 2173 | FOR_EACH_VEC_ELT (edges, i, e) |
30a435d8 | 2174 | if (e->flags & EDGE_COMPLEX) |
f5843d08 RG |
2175 | { |
2176 | res = true; | |
2177 | break; | |
2178 | } | |
f5843d08 | 2179 | return res; |
8c5fdaae | 2180 | } |
30a435d8 | 2181 | #endif |
8c5fdaae | 2182 | |
30ea859e VM |
2183 | /* Sort loops for marking them for removal. We put already marked |
2184 | loops first, then less frequent loops next, and then outer loops | |
2185 | next. */ | |
2186 | static int | |
2187 | loop_compare_func (const void *v1p, const void *v2p) | |
2188 | { | |
2189 | int diff; | |
2190 | ira_loop_tree_node_t l1 = *(const ira_loop_tree_node_t *) v1p; | |
2191 | ira_loop_tree_node_t l2 = *(const ira_loop_tree_node_t *) v2p; | |
2192 | ||
2193 | ira_assert (l1->parent != NULL && l2->parent != NULL); | |
2194 | if (l1->to_remove_p && ! l2->to_remove_p) | |
2195 | return -1; | |
2196 | if (! l1->to_remove_p && l2->to_remove_p) | |
2197 | return 1; | |
e7a74006 JH |
2198 | if ((diff = l1->loop->header->count.to_frequency (cfun) |
2199 | - l2->loop->header->count.to_frequency (cfun)) != 0) | |
30ea859e VM |
2200 | return diff; |
2201 | if ((diff = (int) loop_depth (l1->loop) - (int) loop_depth (l2->loop)) != 0) | |
2202 | return diff; | |
2203 | /* Make sorting stable. */ | |
2608d841 | 2204 | return l1->loop_num - l2->loop_num; |
30ea859e VM |
2205 | } |
2206 | ||
30ea859e VM |
2207 | /* Mark loops which should be removed from regional allocation. We |
2208 | remove a loop with low register pressure inside another loop with | |
2209 | register pressure. In this case a separate allocation of the loop | |
2210 | hardly helps (for irregular register file architecture it could | |
2211 | help by choosing a better hard register in the loop but we prefer | |
2212 | faster allocation even in this case). We also remove cheap loops | |
028d4092 | 2213 | if there are more than param_ira_max_loops_num of them. Loop with EH |
8c5fdaae VM |
2214 | exit or enter edges are removed too because the allocation might |
2215 | require put pseudo moves on the EH edges (we could still do this | |
2216 | for pseudos with caller saved hard registers in some cases but it | |
2217 | is impossible to say here or during top-down allocation pass what | |
2218 | hard register the pseudos get finally). */ | |
30ea859e VM |
2219 | static void |
2220 | mark_loops_for_removal (void) | |
058e97ec | 2221 | { |
30ea859e VM |
2222 | int i, n; |
2223 | ira_loop_tree_node_t *sorted_loops; | |
2224 | loop_p loop; | |
2225 | ||
2608d841 | 2226 | ira_assert (current_loops != NULL); |
30ea859e VM |
2227 | sorted_loops |
2228 | = (ira_loop_tree_node_t *) ira_allocate (sizeof (ira_loop_tree_node_t) | |
0fc822d0 RB |
2229 | * number_of_loops (cfun)); |
2230 | for (n = i = 0; vec_safe_iterate (get_loops (cfun), i, &loop); i++) | |
30ea859e VM |
2231 | if (ira_loop_nodes[i].regno_allocno_map != NULL) |
2232 | { | |
2233 | if (ira_loop_nodes[i].parent == NULL) | |
2234 | { | |
2235 | /* Don't remove the root. */ | |
2236 | ira_loop_nodes[i].to_remove_p = false; | |
2237 | continue; | |
2238 | } | |
2239 | sorted_loops[n++] = &ira_loop_nodes[i]; | |
2240 | ira_loop_nodes[i].to_remove_p | |
8c5fdaae VM |
2241 | = ((low_pressure_loop_node_p (ira_loop_nodes[i].parent) |
2242 | && low_pressure_loop_node_p (&ira_loop_nodes[i])) | |
30a435d8 VM |
2243 | #ifdef STACK_REGS |
2244 | || loop_with_complex_edge_p (ira_loop_nodes[i].loop) | |
2245 | #endif | |
2246 | ); | |
30ea859e VM |
2247 | } |
2248 | qsort (sorted_loops, n, sizeof (ira_loop_tree_node_t), loop_compare_func); | |
028d4092 | 2249 | for (i = 0; i < n - param_ira_max_loops_num; i++) |
30ea859e VM |
2250 | { |
2251 | sorted_loops[i]->to_remove_p = true; | |
2252 | if (internal_flag_ira_verbose > 1 && ira_dump_file != NULL) | |
2253 | fprintf | |
2254 | (ira_dump_file, | |
2255 | " Mark loop %d (header %d, freq %d, depth %d) for removal (%s)\n", | |
2608d841 | 2256 | sorted_loops[i]->loop_num, sorted_loops[i]->loop->header->index, |
e7a74006 | 2257 | sorted_loops[i]->loop->header->count.to_frequency (cfun), |
30ea859e VM |
2258 | loop_depth (sorted_loops[i]->loop), |
2259 | low_pressure_loop_node_p (sorted_loops[i]->parent) | |
2260 | && low_pressure_loop_node_p (sorted_loops[i]) | |
2261 | ? "low pressure" : "cheap loop"); | |
2262 | } | |
2263 | ira_free (sorted_loops); | |
058e97ec VM |
2264 | } |
2265 | ||
311aab06 VM |
2266 | /* Mark all loops but root for removing. */ |
2267 | static void | |
2268 | mark_all_loops_for_removal (void) | |
2269 | { | |
2270 | int i; | |
2271 | loop_p loop; | |
2272 | ||
2608d841 | 2273 | ira_assert (current_loops != NULL); |
0fc822d0 | 2274 | FOR_EACH_VEC_SAFE_ELT (get_loops (cfun), i, loop) |
311aab06 VM |
2275 | if (ira_loop_nodes[i].regno_allocno_map != NULL) |
2276 | { | |
2277 | if (ira_loop_nodes[i].parent == NULL) | |
2278 | { | |
2279 | /* Don't remove the root. */ | |
2280 | ira_loop_nodes[i].to_remove_p = false; | |
2281 | continue; | |
2282 | } | |
2283 | ira_loop_nodes[i].to_remove_p = true; | |
2284 | if (internal_flag_ira_verbose > 1 && ira_dump_file != NULL) | |
2285 | fprintf | |
2286 | (ira_dump_file, | |
2287 | " Mark loop %d (header %d, freq %d, depth %d) for removal\n", | |
2608d841 | 2288 | ira_loop_nodes[i].loop_num, |
311aab06 | 2289 | ira_loop_nodes[i].loop->header->index, |
e7a74006 | 2290 | ira_loop_nodes[i].loop->header->count.to_frequency (cfun), |
311aab06 VM |
2291 | loop_depth (ira_loop_nodes[i].loop)); |
2292 | } | |
2293 | } | |
30ea859e | 2294 | |
058e97ec | 2295 | /* Definition of vector of loop tree nodes. */ |
058e97ec VM |
2296 | |
2297 | /* Vec containing references to all removed loop tree nodes. */ | |
9771b263 | 2298 | static vec<ira_loop_tree_node_t> removed_loop_vec; |
058e97ec VM |
2299 | |
2300 | /* Vec containing references to all children of loop tree nodes. */ | |
9771b263 | 2301 | static vec<ira_loop_tree_node_t> children_vec; |
058e97ec VM |
2302 | |
2303 | /* Remove subregions of NODE if their separate allocation will not | |
2304 | improve the result. */ | |
2305 | static void | |
2306 | remove_uneccesary_loop_nodes_from_loop_tree (ira_loop_tree_node_t node) | |
2307 | { | |
2308 | unsigned int start; | |
2309 | bool remove_p; | |
2310 | ira_loop_tree_node_t subnode; | |
2311 | ||
30ea859e | 2312 | remove_p = node->to_remove_p; |
058e97ec | 2313 | if (! remove_p) |
9771b263 DN |
2314 | children_vec.safe_push (node); |
2315 | start = children_vec.length (); | |
058e97ec VM |
2316 | for (subnode = node->children; subnode != NULL; subnode = subnode->next) |
2317 | if (subnode->bb == NULL) | |
2318 | remove_uneccesary_loop_nodes_from_loop_tree (subnode); | |
2319 | else | |
9771b263 | 2320 | children_vec.safe_push (subnode); |
058e97ec VM |
2321 | node->children = node->subloops = NULL; |
2322 | if (remove_p) | |
2323 | { | |
9771b263 | 2324 | removed_loop_vec.safe_push (node); |
058e97ec VM |
2325 | return; |
2326 | } | |
9771b263 | 2327 | while (children_vec.length () > start) |
058e97ec | 2328 | { |
9771b263 | 2329 | subnode = children_vec.pop (); |
058e97ec VM |
2330 | subnode->parent = node; |
2331 | subnode->next = node->children; | |
2332 | node->children = subnode; | |
2333 | if (subnode->bb == NULL) | |
2334 | { | |
2335 | subnode->subloop_next = node->subloops; | |
2336 | node->subloops = subnode; | |
2337 | } | |
2338 | } | |
2339 | } | |
2340 | ||
c6bb4c93 VM |
2341 | /* Return TRUE if NODE is inside PARENT. */ |
2342 | static bool | |
2343 | loop_is_inside_p (ira_loop_tree_node_t node, ira_loop_tree_node_t parent) | |
2344 | { | |
2345 | for (node = node->parent; node != NULL; node = node->parent) | |
2346 | if (node == parent) | |
2347 | return true; | |
2348 | return false; | |
2349 | } | |
2350 | ||
2351 | /* Sort allocnos according to their order in regno allocno list. */ | |
2352 | static int | |
2353 | regno_allocno_order_compare_func (const void *v1p, const void *v2p) | |
2354 | { | |
2355 | ira_allocno_t a1 = *(const ira_allocno_t *) v1p; | |
2356 | ira_allocno_t a2 = *(const ira_allocno_t *) v2p; | |
2357 | ira_loop_tree_node_t n1 = ALLOCNO_LOOP_TREE_NODE (a1); | |
2358 | ira_loop_tree_node_t n2 = ALLOCNO_LOOP_TREE_NODE (a2); | |
2359 | ||
2360 | if (loop_is_inside_p (n1, n2)) | |
2361 | return -1; | |
2362 | else if (loop_is_inside_p (n2, n1)) | |
2363 | return 1; | |
2364 | /* If allocnos are equally good, sort by allocno numbers, so that | |
2365 | the results of qsort leave nothing to chance. We put allocnos | |
2366 | with higher number first in the list because it is the original | |
2367 | order for allocnos from loops on the same levels. */ | |
2368 | return ALLOCNO_NUM (a2) - ALLOCNO_NUM (a1); | |
2369 | } | |
2370 | ||
2371 | /* This array is used to sort allocnos to restore allocno order in | |
2372 | the regno allocno list. */ | |
2373 | static ira_allocno_t *regno_allocnos; | |
2374 | ||
2375 | /* Restore allocno order for REGNO in the regno allocno list. */ | |
2376 | static void | |
2377 | ira_rebuild_regno_allocno_list (int regno) | |
2378 | { | |
2379 | int i, n; | |
2380 | ira_allocno_t a; | |
2381 | ||
2382 | for (n = 0, a = ira_regno_allocno_map[regno]; | |
2383 | a != NULL; | |
2384 | a = ALLOCNO_NEXT_REGNO_ALLOCNO (a)) | |
2385 | regno_allocnos[n++] = a; | |
2386 | ira_assert (n > 0); | |
b8698a0f | 2387 | qsort (regno_allocnos, n, sizeof (ira_allocno_t), |
c6bb4c93 VM |
2388 | regno_allocno_order_compare_func); |
2389 | for (i = 1; i < n; i++) | |
2390 | ALLOCNO_NEXT_REGNO_ALLOCNO (regno_allocnos[i - 1]) = regno_allocnos[i]; | |
2391 | ALLOCNO_NEXT_REGNO_ALLOCNO (regno_allocnos[n - 1]) = NULL; | |
2392 | ira_regno_allocno_map[regno] = regno_allocnos[0]; | |
2393 | if (internal_flag_ira_verbose > 1 && ira_dump_file != NULL) | |
2394 | fprintf (ira_dump_file, " Rebuilding regno allocno list for %d\n", regno); | |
2395 | } | |
2396 | ||
311aab06 VM |
2397 | /* Propagate info from allocno FROM_A to allocno A. */ |
2398 | static void | |
2399 | propagate_some_info_from_allocno (ira_allocno_t a, ira_allocno_t from_a) | |
2400 | { | |
1756cb66 | 2401 | enum reg_class aclass; |
311aab06 | 2402 | |
3c55880a | 2403 | merge_hard_reg_conflicts (from_a, a, false); |
311aab06 VM |
2404 | ALLOCNO_NREFS (a) += ALLOCNO_NREFS (from_a); |
2405 | ALLOCNO_FREQ (a) += ALLOCNO_FREQ (from_a); | |
2406 | ALLOCNO_CALL_FREQ (a) += ALLOCNO_CALL_FREQ (from_a); | |
311aab06 | 2407 | ALLOCNO_CALLS_CROSSED_NUM (a) += ALLOCNO_CALLS_CROSSED_NUM (from_a); |
e384e6b5 BS |
2408 | ALLOCNO_CHEAP_CALLS_CROSSED_NUM (a) |
2409 | += ALLOCNO_CHEAP_CALLS_CROSSED_NUM (from_a); | |
6c476222 | 2410 | ALLOCNO_CROSSED_CALLS_ABIS (a) |= ALLOCNO_CROSSED_CALLS_ABIS (from_a); |
44942965 RS |
2411 | ALLOCNO_CROSSED_CALLS_CLOBBERED_REGS (a) |
2412 | |= ALLOCNO_CROSSED_CALLS_CLOBBERED_REGS (from_a); | |
c2ba7e7a | 2413 | |
311aab06 VM |
2414 | ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (a) |
2415 | += ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (from_a); | |
2416 | if (! ALLOCNO_BAD_SPILL_P (from_a)) | |
2417 | ALLOCNO_BAD_SPILL_P (a) = false; | |
1756cb66 VM |
2418 | aclass = ALLOCNO_CLASS (from_a); |
2419 | ira_assert (aclass == ALLOCNO_CLASS (a)); | |
2420 | ira_allocate_and_accumulate_costs (&ALLOCNO_HARD_REG_COSTS (a), aclass, | |
311aab06 VM |
2421 | ALLOCNO_HARD_REG_COSTS (from_a)); |
2422 | ira_allocate_and_accumulate_costs (&ALLOCNO_CONFLICT_HARD_REG_COSTS (a), | |
1756cb66 | 2423 | aclass, |
311aab06 | 2424 | ALLOCNO_CONFLICT_HARD_REG_COSTS (from_a)); |
1756cb66 | 2425 | ALLOCNO_CLASS_COST (a) += ALLOCNO_CLASS_COST (from_a); |
311aab06 VM |
2426 | ALLOCNO_MEMORY_COST (a) += ALLOCNO_MEMORY_COST (from_a); |
2427 | } | |
2428 | ||
058e97ec VM |
2429 | /* Remove allocnos from loops removed from the allocation |
2430 | consideration. */ | |
2431 | static void | |
2432 | remove_unnecessary_allocnos (void) | |
2433 | { | |
2434 | int regno; | |
c6bb4c93 | 2435 | bool merged_p, rebuild_p; |
058e97ec VM |
2436 | ira_allocno_t a, prev_a, next_a, parent_a; |
2437 | ira_loop_tree_node_t a_node, parent; | |
058e97ec VM |
2438 | |
2439 | merged_p = false; | |
c6bb4c93 | 2440 | regno_allocnos = NULL; |
058e97ec | 2441 | for (regno = max_reg_num () - 1; regno >= FIRST_PSEUDO_REGISTER; regno--) |
c6bb4c93 VM |
2442 | { |
2443 | rebuild_p = false; | |
2444 | for (prev_a = NULL, a = ira_regno_allocno_map[regno]; | |
2445 | a != NULL; | |
2446 | a = next_a) | |
2447 | { | |
2448 | next_a = ALLOCNO_NEXT_REGNO_ALLOCNO (a); | |
2449 | a_node = ALLOCNO_LOOP_TREE_NODE (a); | |
2450 | if (! a_node->to_remove_p) | |
2451 | prev_a = a; | |
2452 | else | |
2453 | { | |
2454 | for (parent = a_node->parent; | |
2455 | (parent_a = parent->regno_allocno_map[regno]) == NULL | |
2456 | && parent->to_remove_p; | |
2457 | parent = parent->parent) | |
2458 | ; | |
2459 | if (parent_a == NULL) | |
2460 | { | |
311aab06 VM |
2461 | /* There are no allocnos with the same regno in |
2462 | upper region -- just move the allocno to the | |
2463 | upper region. */ | |
c6bb4c93 VM |
2464 | prev_a = a; |
2465 | ALLOCNO_LOOP_TREE_NODE (a) = parent; | |
2466 | parent->regno_allocno_map[regno] = a; | |
2467 | bitmap_set_bit (parent->all_allocnos, ALLOCNO_NUM (a)); | |
2468 | rebuild_p = true; | |
2469 | } | |
2470 | else | |
2471 | { | |
2472 | /* Remove the allocno and update info of allocno in | |
2473 | the upper region. */ | |
2474 | if (prev_a == NULL) | |
2475 | ira_regno_allocno_map[regno] = next_a; | |
2476 | else | |
2477 | ALLOCNO_NEXT_REGNO_ALLOCNO (prev_a) = next_a; | |
3c55880a | 2478 | move_allocno_live_ranges (a, parent_a); |
c6bb4c93 | 2479 | merged_p = true; |
311aab06 | 2480 | propagate_some_info_from_allocno (parent_a, a); |
46044dd9 L |
2481 | /* Remove it from the corresponding regno allocno |
2482 | map to avoid info propagation of subsequent | |
2483 | allocno into this already removed allocno. */ | |
2484 | a_node->regno_allocno_map[regno] = NULL; | |
3b6d1699 | 2485 | ira_remove_allocno_prefs (a); |
c6bb4c93 VM |
2486 | finish_allocno (a); |
2487 | } | |
2488 | } | |
2489 | } | |
2490 | if (rebuild_p) | |
2491 | /* We need to restore the order in regno allocno list. */ | |
2492 | { | |
2493 | if (regno_allocnos == NULL) | |
2494 | regno_allocnos | |
2495 | = (ira_allocno_t *) ira_allocate (sizeof (ira_allocno_t) | |
2496 | * ira_allocnos_num); | |
2497 | ira_rebuild_regno_allocno_list (regno); | |
2498 | } | |
2499 | } | |
058e97ec VM |
2500 | if (merged_p) |
2501 | ira_rebuild_start_finish_chains (); | |
c6bb4c93 VM |
2502 | if (regno_allocnos != NULL) |
2503 | ira_free (regno_allocnos); | |
058e97ec VM |
2504 | } |
2505 | ||
311aab06 | 2506 | /* Remove allocnos from all loops but the root. */ |
058e97ec | 2507 | static void |
311aab06 | 2508 | remove_low_level_allocnos (void) |
058e97ec | 2509 | { |
311aab06 VM |
2510 | int regno; |
2511 | bool merged_p, propagate_p; | |
2512 | ira_allocno_t a, top_a; | |
2513 | ira_loop_tree_node_t a_node, parent; | |
311aab06 VM |
2514 | ira_allocno_iterator ai; |
2515 | ||
2516 | merged_p = false; | |
2517 | FOR_EACH_ALLOCNO (a, ai) | |
2518 | { | |
2519 | a_node = ALLOCNO_LOOP_TREE_NODE (a); | |
2520 | if (a_node == ira_loop_tree_root || ALLOCNO_CAP_MEMBER (a) != NULL) | |
2521 | continue; | |
2522 | regno = ALLOCNO_REGNO (a); | |
2523 | if ((top_a = ira_loop_tree_root->regno_allocno_map[regno]) == NULL) | |
2524 | { | |
2525 | ALLOCNO_LOOP_TREE_NODE (a) = ira_loop_tree_root; | |
2526 | ira_loop_tree_root->regno_allocno_map[regno] = a; | |
2527 | continue; | |
2528 | } | |
2529 | propagate_p = a_node->parent->regno_allocno_map[regno] == NULL; | |
2530 | /* Remove the allocno and update info of allocno in the upper | |
2531 | region. */ | |
3c55880a | 2532 | move_allocno_live_ranges (a, top_a); |
311aab06 | 2533 | merged_p = true; |
311aab06 VM |
2534 | if (propagate_p) |
2535 | propagate_some_info_from_allocno (top_a, a); | |
2536 | } | |
2537 | FOR_EACH_ALLOCNO (a, ai) | |
2538 | { | |
2539 | a_node = ALLOCNO_LOOP_TREE_NODE (a); | |
2540 | if (a_node == ira_loop_tree_root) | |
2541 | continue; | |
2542 | parent = a_node->parent; | |
2543 | regno = ALLOCNO_REGNO (a); | |
2544 | if (ALLOCNO_CAP_MEMBER (a) != NULL) | |
2545 | ira_assert (ALLOCNO_CAP (a) != NULL); | |
2546 | else if (ALLOCNO_CAP (a) == NULL) | |
2547 | ira_assert (parent->regno_allocno_map[regno] != NULL); | |
2548 | } | |
2549 | FOR_EACH_ALLOCNO (a, ai) | |
2550 | { | |
2551 | regno = ALLOCNO_REGNO (a); | |
2552 | if (ira_loop_tree_root->regno_allocno_map[regno] == a) | |
2553 | { | |
ac0ab4f7 BS |
2554 | ira_object_t obj; |
2555 | ira_allocno_object_iterator oi; | |
a49ae217 | 2556 | |
311aab06 VM |
2557 | ira_regno_allocno_map[regno] = a; |
2558 | ALLOCNO_NEXT_REGNO_ALLOCNO (a) = NULL; | |
2559 | ALLOCNO_CAP_MEMBER (a) = NULL; | |
ac0ab4f7 | 2560 | FOR_EACH_ALLOCNO_OBJECT (a, obj, oi) |
6576d245 RS |
2561 | OBJECT_CONFLICT_HARD_REGS (obj) |
2562 | = OBJECT_TOTAL_CONFLICT_HARD_REGS (obj); | |
311aab06 VM |
2563 | #ifdef STACK_REGS |
2564 | if (ALLOCNO_TOTAL_NO_STACK_REG_P (a)) | |
2565 | ALLOCNO_NO_STACK_REG_P (a) = true; | |
2566 | #endif | |
2567 | } | |
2568 | else | |
3b6d1699 VM |
2569 | { |
2570 | ira_remove_allocno_prefs (a); | |
2571 | finish_allocno (a); | |
2572 | } | |
311aab06 VM |
2573 | } |
2574 | if (merged_p) | |
2575 | ira_rebuild_start_finish_chains (); | |
2576 | } | |
2577 | ||
2578 | /* Remove loops from consideration. We remove all loops except for | |
2579 | root if ALL_P or loops for which a separate allocation will not | |
2580 | improve the result. We have to do this after allocno creation and | |
1756cb66 VM |
2581 | their costs and allocno class evaluation because only after that |
2582 | the register pressure can be known and is calculated. */ | |
311aab06 VM |
2583 | static void |
2584 | remove_unnecessary_regions (bool all_p) | |
2585 | { | |
2608d841 VM |
2586 | if (current_loops == NULL) |
2587 | return; | |
311aab06 VM |
2588 | if (all_p) |
2589 | mark_all_loops_for_removal (); | |
2590 | else | |
2591 | mark_loops_for_removal (); | |
8b1c6fd7 DM |
2592 | children_vec.create (last_basic_block_for_fn (cfun) |
2593 | + number_of_loops (cfun)); | |
2594 | removed_loop_vec.create (last_basic_block_for_fn (cfun) | |
2595 | + number_of_loops (cfun)); | |
9771b263 DN |
2596 | remove_uneccesary_loop_nodes_from_loop_tree (ira_loop_tree_root); |
2597 | children_vec.release (); | |
311aab06 VM |
2598 | if (all_p) |
2599 | remove_low_level_allocnos (); | |
2600 | else | |
2601 | remove_unnecessary_allocnos (); | |
9771b263 DN |
2602 | while (removed_loop_vec.length () > 0) |
2603 | finish_loop_tree_node (removed_loop_vec.pop ()); | |
2604 | removed_loop_vec.release (); | |
058e97ec VM |
2605 | } |
2606 | ||
2607 | \f | |
2608 | ||
927425df VM |
2609 | /* At this point true value of allocno attribute bad_spill_p means |
2610 | that there is an insn where allocno occurs and where the allocno | |
67914693 SL |
2611 | cannot be used as memory. The function updates the attribute, now |
2612 | it can be true only for allocnos which cannot be used as memory in | |
927425df VM |
2613 | an insn and in whose live ranges there is other allocno deaths. |
2614 | Spilling allocnos with true value will not improve the code because | |
2615 | it will not make other allocnos colorable and additional reloads | |
2616 | for the corresponding pseudo will be generated in reload pass for | |
2617 | each insn it occurs. | |
2618 | ||
2619 | This is a trick mentioned in one classic article of Chaitin etc | |
2620 | which is frequently omitted in other implementations of RA based on | |
2621 | graph coloring. */ | |
2622 | static void | |
2623 | update_bad_spill_attribute (void) | |
2624 | { | |
2625 | int i; | |
2626 | ira_allocno_t a; | |
2627 | ira_allocno_iterator ai; | |
ac0ab4f7 BS |
2628 | ira_allocno_object_iterator aoi; |
2629 | ira_object_t obj; | |
b14151b5 | 2630 | live_range_t r; |
1756cb66 | 2631 | enum reg_class aclass; |
927425df VM |
2632 | bitmap_head dead_points[N_REG_CLASSES]; |
2633 | ||
1756cb66 | 2634 | for (i = 0; i < ira_allocno_classes_num; i++) |
927425df | 2635 | { |
1756cb66 VM |
2636 | aclass = ira_allocno_classes[i]; |
2637 | bitmap_initialize (&dead_points[aclass], ®_obstack); | |
927425df VM |
2638 | } |
2639 | FOR_EACH_ALLOCNO (a, ai) | |
2640 | { | |
1756cb66 VM |
2641 | aclass = ALLOCNO_CLASS (a); |
2642 | if (aclass == NO_REGS) | |
927425df | 2643 | continue; |
ac0ab4f7 BS |
2644 | FOR_EACH_ALLOCNO_OBJECT (a, obj, aoi) |
2645 | for (r = OBJECT_LIVE_RANGES (obj); r != NULL; r = r->next) | |
1756cb66 | 2646 | bitmap_set_bit (&dead_points[aclass], r->finish); |
927425df VM |
2647 | } |
2648 | FOR_EACH_ALLOCNO (a, ai) | |
2649 | { | |
1756cb66 VM |
2650 | aclass = ALLOCNO_CLASS (a); |
2651 | if (aclass == NO_REGS) | |
927425df VM |
2652 | continue; |
2653 | if (! ALLOCNO_BAD_SPILL_P (a)) | |
2654 | continue; | |
ac0ab4f7 | 2655 | FOR_EACH_ALLOCNO_OBJECT (a, obj, aoi) |
927425df | 2656 | { |
ac0ab4f7 BS |
2657 | for (r = OBJECT_LIVE_RANGES (obj); r != NULL; r = r->next) |
2658 | { | |
2659 | for (i = r->start + 1; i < r->finish; i++) | |
1756cb66 | 2660 | if (bitmap_bit_p (&dead_points[aclass], i)) |
ac0ab4f7 BS |
2661 | break; |
2662 | if (i < r->finish) | |
2663 | break; | |
2664 | } | |
2665 | if (r != NULL) | |
2666 | { | |
2667 | ALLOCNO_BAD_SPILL_P (a) = false; | |
927425df | 2668 | break; |
ac0ab4f7 | 2669 | } |
927425df | 2670 | } |
927425df | 2671 | } |
1756cb66 | 2672 | for (i = 0; i < ira_allocno_classes_num; i++) |
927425df | 2673 | { |
1756cb66 VM |
2674 | aclass = ira_allocno_classes[i]; |
2675 | bitmap_clear (&dead_points[aclass]); | |
927425df VM |
2676 | } |
2677 | } | |
2678 | ||
2679 | \f | |
2680 | ||
058e97ec VM |
2681 | /* Set up minimal and maximal live range points for allocnos. */ |
2682 | static void | |
2683 | setup_min_max_allocno_live_range_point (void) | |
2684 | { | |
2685 | int i; | |
2686 | ira_allocno_t a, parent_a, cap; | |
2687 | ira_allocno_iterator ai; | |
ac0ab4f7 BS |
2688 | #ifdef ENABLE_IRA_CHECKING |
2689 | ira_object_iterator oi; | |
2690 | ira_object_t obj; | |
2691 | #endif | |
b14151b5 | 2692 | live_range_t r; |
058e97ec VM |
2693 | ira_loop_tree_node_t parent; |
2694 | ||
2695 | FOR_EACH_ALLOCNO (a, ai) | |
2696 | { | |
ac0ab4f7 | 2697 | int n = ALLOCNO_NUM_OBJECTS (a); |
1756cb66 | 2698 | |
ac0ab4f7 BS |
2699 | for (i = 0; i < n; i++) |
2700 | { | |
2701 | ira_object_t obj = ALLOCNO_OBJECT (a, i); | |
2702 | r = OBJECT_LIVE_RANGES (obj); | |
2703 | if (r == NULL) | |
2704 | continue; | |
2705 | OBJECT_MAX (obj) = r->finish; | |
2706 | for (; r->next != NULL; r = r->next) | |
2707 | ; | |
2708 | OBJECT_MIN (obj) = r->start; | |
2709 | } | |
058e97ec VM |
2710 | } |
2711 | for (i = max_reg_num () - 1; i >= FIRST_PSEUDO_REGISTER; i--) | |
2712 | for (a = ira_regno_allocno_map[i]; | |
2713 | a != NULL; | |
2714 | a = ALLOCNO_NEXT_REGNO_ALLOCNO (a)) | |
2715 | { | |
ac0ab4f7 BS |
2716 | int j; |
2717 | int n = ALLOCNO_NUM_OBJECTS (a); | |
1756cb66 | 2718 | |
ac0ab4f7 | 2719 | for (j = 0; j < n; j++) |
058e97ec | 2720 | { |
ac0ab4f7 BS |
2721 | ira_object_t obj = ALLOCNO_OBJECT (a, j); |
2722 | ira_object_t parent_obj; | |
2723 | ||
2724 | if (OBJECT_MAX (obj) < 0) | |
ffd464df VM |
2725 | { |
2726 | /* The object is not used and hence does not live. */ | |
2727 | ira_assert (OBJECT_LIVE_RANGES (obj) == NULL); | |
2728 | OBJECT_MAX (obj) = 0; | |
2729 | OBJECT_MIN (obj) = 1; | |
2730 | continue; | |
2731 | } | |
ac0ab4f7 BS |
2732 | ira_assert (ALLOCNO_CAP_MEMBER (a) == NULL); |
2733 | /* Accumulation of range info. */ | |
2734 | if (ALLOCNO_CAP (a) != NULL) | |
058e97ec | 2735 | { |
ac0ab4f7 BS |
2736 | for (cap = ALLOCNO_CAP (a); cap != NULL; cap = ALLOCNO_CAP (cap)) |
2737 | { | |
2738 | ira_object_t cap_obj = ALLOCNO_OBJECT (cap, j); | |
2739 | if (OBJECT_MAX (cap_obj) < OBJECT_MAX (obj)) | |
2740 | OBJECT_MAX (cap_obj) = OBJECT_MAX (obj); | |
2741 | if (OBJECT_MIN (cap_obj) > OBJECT_MIN (obj)) | |
2742 | OBJECT_MIN (cap_obj) = OBJECT_MIN (obj); | |
2743 | } | |
2744 | continue; | |
058e97ec | 2745 | } |
ac0ab4f7 BS |
2746 | if ((parent = ALLOCNO_LOOP_TREE_NODE (a)->parent) == NULL) |
2747 | continue; | |
2748 | parent_a = parent->regno_allocno_map[i]; | |
2749 | parent_obj = ALLOCNO_OBJECT (parent_a, j); | |
2750 | if (OBJECT_MAX (parent_obj) < OBJECT_MAX (obj)) | |
2751 | OBJECT_MAX (parent_obj) = OBJECT_MAX (obj); | |
2752 | if (OBJECT_MIN (parent_obj) > OBJECT_MIN (obj)) | |
2753 | OBJECT_MIN (parent_obj) = OBJECT_MIN (obj); | |
058e97ec | 2754 | } |
058e97ec VM |
2755 | } |
2756 | #ifdef ENABLE_IRA_CHECKING | |
ac0ab4f7 | 2757 | FOR_EACH_OBJECT (obj, oi) |
058e97ec | 2758 | { |
01512446 JJ |
2759 | if ((OBJECT_MIN (obj) >= 0 && OBJECT_MIN (obj) <= ira_max_point) |
2760 | && (OBJECT_MAX (obj) >= 0 && OBJECT_MAX (obj) <= ira_max_point)) | |
058e97ec VM |
2761 | continue; |
2762 | gcc_unreachable (); | |
2763 | } | |
2764 | #endif | |
2765 | } | |
2766 | ||
2767 | /* Sort allocnos according to their live ranges. Allocnos with | |
1756cb66 VM |
2768 | smaller allocno class are put first unless we use priority |
2769 | coloring. Allocnos with the same class are ordered according | |
2770 | their start (min). Allocnos with the same start are ordered | |
2771 | according their finish (max). */ | |
058e97ec | 2772 | static int |
ac0ab4f7 | 2773 | object_range_compare_func (const void *v1p, const void *v2p) |
058e97ec VM |
2774 | { |
2775 | int diff; | |
a49ae217 BS |
2776 | ira_object_t obj1 = *(const ira_object_t *) v1p; |
2777 | ira_object_t obj2 = *(const ira_object_t *) v2p; | |
2778 | ira_allocno_t a1 = OBJECT_ALLOCNO (obj1); | |
2779 | ira_allocno_t a2 = OBJECT_ALLOCNO (obj2); | |
058e97ec | 2780 | |
a49ae217 | 2781 | if ((diff = OBJECT_MIN (obj1) - OBJECT_MIN (obj2)) != 0) |
058e97ec | 2782 | return diff; |
a49ae217 | 2783 | if ((diff = OBJECT_MAX (obj1) - OBJECT_MAX (obj2)) != 0) |
058e97ec VM |
2784 | return diff; |
2785 | return ALLOCNO_NUM (a1) - ALLOCNO_NUM (a2); | |
2786 | } | |
2787 | ||
a49ae217 | 2788 | /* Sort ira_object_id_map and set up conflict id of allocnos. */ |
058e97ec | 2789 | static void |
a49ae217 | 2790 | sort_conflict_id_map (void) |
058e97ec VM |
2791 | { |
2792 | int i, num; | |
2793 | ira_allocno_t a; | |
2794 | ira_allocno_iterator ai; | |
2795 | ||
2796 | num = 0; | |
2797 | FOR_EACH_ALLOCNO (a, ai) | |
ac0ab4f7 BS |
2798 | { |
2799 | ira_allocno_object_iterator oi; | |
2800 | ira_object_t obj; | |
2801 | ||
2802 | FOR_EACH_ALLOCNO_OBJECT (a, obj, oi) | |
2803 | ira_object_id_map[num++] = obj; | |
2804 | } | |
85c00e0b JJ |
2805 | if (num > 1) |
2806 | qsort (ira_object_id_map, num, sizeof (ira_object_t), | |
2807 | object_range_compare_func); | |
058e97ec | 2808 | for (i = 0; i < num; i++) |
a49ae217 BS |
2809 | { |
2810 | ira_object_t obj = ira_object_id_map[i]; | |
1756cb66 | 2811 | |
a49ae217 BS |
2812 | gcc_assert (obj != NULL); |
2813 | OBJECT_CONFLICT_ID (obj) = i; | |
2814 | } | |
2815 | for (i = num; i < ira_objects_num; i++) | |
2816 | ira_object_id_map[i] = NULL; | |
058e97ec VM |
2817 | } |
2818 | ||
2819 | /* Set up minimal and maximal conflict ids of allocnos with which | |
2820 | given allocno can conflict. */ | |
2821 | static void | |
2822 | setup_min_max_conflict_allocno_ids (void) | |
2823 | { | |
1756cb66 | 2824 | int aclass; |
058e97ec VM |
2825 | int i, j, min, max, start, finish, first_not_finished, filled_area_start; |
2826 | int *live_range_min, *last_lived; | |
ac0ab4f7 | 2827 | int word0_min, word0_max; |
058e97ec | 2828 | ira_allocno_t a; |
ac0ab4f7 | 2829 | ira_allocno_iterator ai; |
058e97ec | 2830 | |
a49ae217 | 2831 | live_range_min = (int *) ira_allocate (sizeof (int) * ira_objects_num); |
1756cb66 | 2832 | aclass = -1; |
058e97ec | 2833 | first_not_finished = -1; |
a49ae217 | 2834 | for (i = 0; i < ira_objects_num; i++) |
058e97ec | 2835 | { |
a49ae217 | 2836 | ira_object_t obj = ira_object_id_map[i]; |
1756cb66 | 2837 | |
a49ae217 | 2838 | if (obj == NULL) |
058e97ec | 2839 | continue; |
a49ae217 BS |
2840 | |
2841 | a = OBJECT_ALLOCNO (obj); | |
2842 | ||
1756cb66 | 2843 | if (aclass < 0) |
058e97ec | 2844 | { |
1756cb66 | 2845 | aclass = ALLOCNO_CLASS (a); |
058e97ec VM |
2846 | min = i; |
2847 | first_not_finished = i; | |
2848 | } | |
2849 | else | |
2850 | { | |
a49ae217 | 2851 | start = OBJECT_MIN (obj); |
058e97ec VM |
2852 | /* If we skip an allocno, the allocno with smaller ids will |
2853 | be also skipped because of the secondary sorting the | |
2854 | range finishes (see function | |
ac0ab4f7 | 2855 | object_range_compare_func). */ |
058e97ec | 2856 | while (first_not_finished < i |
a49ae217 | 2857 | && start > OBJECT_MAX (ira_object_id_map |
ac0ab4f7 | 2858 | [first_not_finished])) |
058e97ec VM |
2859 | first_not_finished++; |
2860 | min = first_not_finished; | |
b8698a0f | 2861 | } |
058e97ec VM |
2862 | if (min == i) |
2863 | /* We could increase min further in this case but it is good | |
2864 | enough. */ | |
2865 | min++; | |
a49ae217 BS |
2866 | live_range_min[i] = OBJECT_MIN (obj); |
2867 | OBJECT_MIN (obj) = min; | |
058e97ec VM |
2868 | } |
2869 | last_lived = (int *) ira_allocate (sizeof (int) * ira_max_point); | |
1756cb66 | 2870 | aclass = -1; |
058e97ec | 2871 | filled_area_start = -1; |
a49ae217 | 2872 | for (i = ira_objects_num - 1; i >= 0; i--) |
058e97ec | 2873 | { |
a49ae217 | 2874 | ira_object_t obj = ira_object_id_map[i]; |
1756cb66 | 2875 | |
a49ae217 | 2876 | if (obj == NULL) |
058e97ec | 2877 | continue; |
a49ae217 BS |
2878 | |
2879 | a = OBJECT_ALLOCNO (obj); | |
1756cb66 | 2880 | if (aclass < 0) |
058e97ec | 2881 | { |
1756cb66 | 2882 | aclass = ALLOCNO_CLASS (a); |
058e97ec VM |
2883 | for (j = 0; j < ira_max_point; j++) |
2884 | last_lived[j] = -1; | |
2885 | filled_area_start = ira_max_point; | |
2886 | } | |
2887 | min = live_range_min[i]; | |
a49ae217 | 2888 | finish = OBJECT_MAX (obj); |
058e97ec VM |
2889 | max = last_lived[finish]; |
2890 | if (max < 0) | |
2891 | /* We could decrease max further in this case but it is good | |
2892 | enough. */ | |
a49ae217 BS |
2893 | max = OBJECT_CONFLICT_ID (obj) - 1; |
2894 | OBJECT_MAX (obj) = max; | |
058e97ec VM |
2895 | /* In filling, we can go further A range finish to recognize |
2896 | intersection quickly because if the finish of subsequently | |
2897 | processed allocno (it has smaller conflict id) range is | |
2898 | further A range finish than they are definitely intersected | |
2899 | (the reason for this is the allocnos with bigger conflict id | |
2900 | have their range starts not smaller than allocnos with | |
2901 | smaller ids. */ | |
2902 | for (j = min; j < filled_area_start; j++) | |
2903 | last_lived[j] = i; | |
2904 | filled_area_start = min; | |
2905 | } | |
2906 | ira_free (last_lived); | |
2907 | ira_free (live_range_min); | |
ac0ab4f7 BS |
2908 | |
2909 | /* For allocnos with more than one object, we may later record extra conflicts in | |
2910 | subobject 0 that we cannot really know about here. | |
2911 | For now, simply widen the min/max range of these subobjects. */ | |
2912 | ||
2913 | word0_min = INT_MAX; | |
2914 | word0_max = INT_MIN; | |
2915 | ||
2916 | FOR_EACH_ALLOCNO (a, ai) | |
2917 | { | |
2918 | int n = ALLOCNO_NUM_OBJECTS (a); | |
2919 | ira_object_t obj0; | |
1756cb66 | 2920 | |
ac0ab4f7 BS |
2921 | if (n < 2) |
2922 | continue; | |
2923 | obj0 = ALLOCNO_OBJECT (a, 0); | |
2924 | if (OBJECT_CONFLICT_ID (obj0) < word0_min) | |
2925 | word0_min = OBJECT_CONFLICT_ID (obj0); | |
2926 | if (OBJECT_CONFLICT_ID (obj0) > word0_max) | |
2927 | word0_max = OBJECT_CONFLICT_ID (obj0); | |
2928 | } | |
2929 | FOR_EACH_ALLOCNO (a, ai) | |
2930 | { | |
2931 | int n = ALLOCNO_NUM_OBJECTS (a); | |
2932 | ira_object_t obj0; | |
1756cb66 | 2933 | |
ac0ab4f7 BS |
2934 | if (n < 2) |
2935 | continue; | |
2936 | obj0 = ALLOCNO_OBJECT (a, 0); | |
2937 | if (OBJECT_MIN (obj0) > word0_min) | |
2938 | OBJECT_MIN (obj0) = word0_min; | |
2939 | if (OBJECT_MAX (obj0) < word0_max) | |
2940 | OBJECT_MAX (obj0) = word0_max; | |
2941 | } | |
058e97ec VM |
2942 | } |
2943 | ||
2944 | \f | |
2945 | ||
2946 | static void | |
2947 | create_caps (void) | |
2948 | { | |
2949 | ira_allocno_t a; | |
2950 | ira_allocno_iterator ai; | |
2951 | ira_loop_tree_node_t loop_tree_node; | |
2952 | ||
2953 | FOR_EACH_ALLOCNO (a, ai) | |
2954 | { | |
2955 | if (ALLOCNO_LOOP_TREE_NODE (a) == ira_loop_tree_root) | |
2956 | continue; | |
2957 | if (ALLOCNO_CAP_MEMBER (a) != NULL) | |
2958 | create_cap_allocno (a); | |
2959 | else if (ALLOCNO_CAP (a) == NULL) | |
2960 | { | |
2961 | loop_tree_node = ALLOCNO_LOOP_TREE_NODE (a); | |
2962 | if (!bitmap_bit_p (loop_tree_node->border_allocnos, ALLOCNO_NUM (a))) | |
2963 | create_cap_allocno (a); | |
2964 | } | |
2965 | } | |
2966 | } | |
2967 | ||
2968 | \f | |
2969 | ||
2970 | /* The page contains code transforming more one region internal | |
2971 | representation (IR) to one region IR which is necessary for reload. | |
2972 | This transformation is called IR flattening. We might just rebuild | |
2973 | the IR for one region but we don't do it because it takes a lot of | |
2974 | time. */ | |
2975 | ||
82b33628 VM |
2976 | /* Map: regno -> allocnos which will finally represent the regno for |
2977 | IR with one region. */ | |
2978 | static ira_allocno_t *regno_top_level_allocno_map; | |
2979 | ||
029da7d4 BS |
2980 | /* Find the allocno that corresponds to A at a level one higher up in the |
2981 | loop tree. Returns NULL if A is a cap, or if it has no parent. */ | |
2982 | ira_allocno_t | |
2983 | ira_parent_allocno (ira_allocno_t a) | |
2984 | { | |
2985 | ira_loop_tree_node_t parent; | |
2986 | ||
2987 | if (ALLOCNO_CAP (a) != NULL) | |
2988 | return NULL; | |
2989 | ||
2990 | parent = ALLOCNO_LOOP_TREE_NODE (a)->parent; | |
2991 | if (parent == NULL) | |
2992 | return NULL; | |
2993 | ||
2994 | return parent->regno_allocno_map[ALLOCNO_REGNO (a)]; | |
2995 | } | |
2996 | ||
2997 | /* Find the allocno that corresponds to A at a level one higher up in the | |
2998 | loop tree. If ALLOCNO_CAP is set for A, return that. */ | |
2999 | ira_allocno_t | |
3000 | ira_parent_or_cap_allocno (ira_allocno_t a) | |
3001 | { | |
3002 | if (ALLOCNO_CAP (a) != NULL) | |
3003 | return ALLOCNO_CAP (a); | |
3004 | ||
3005 | return ira_parent_allocno (a); | |
3006 | } | |
3007 | ||
82b33628 | 3008 | /* Process all allocnos originated from pseudo REGNO and copy live |
801f03e3 VM |
3009 | ranges, hard reg conflicts, and allocno stack reg attributes from |
3010 | low level allocnos to final allocnos which are destinations of | |
3011 | removed stores at a loop exit. Return true if we copied live | |
3012 | ranges. */ | |
82b33628 | 3013 | static bool |
801f03e3 | 3014 | copy_info_to_removed_store_destinations (int regno) |
82b33628 | 3015 | { |
504b33d8 ILT |
3016 | ira_allocno_t a; |
3017 | ira_allocno_t parent_a = NULL; | |
82b33628 | 3018 | ira_loop_tree_node_t parent; |
82b33628 VM |
3019 | bool merged_p; |
3020 | ||
3021 | merged_p = false; | |
3022 | for (a = ira_regno_allocno_map[regno]; | |
3023 | a != NULL; | |
3024 | a = ALLOCNO_NEXT_REGNO_ALLOCNO (a)) | |
3025 | { | |
1756cb66 | 3026 | if (a != regno_top_level_allocno_map[REGNO (allocno_emit_reg (a))]) |
82b33628 VM |
3027 | /* This allocno will be removed. */ |
3028 | continue; | |
ac0ab4f7 | 3029 | |
82b33628 VM |
3030 | /* Caps will be removed. */ |
3031 | ira_assert (ALLOCNO_CAP_MEMBER (a) == NULL); | |
3032 | for (parent = ALLOCNO_LOOP_TREE_NODE (a)->parent; | |
3033 | parent != NULL; | |
3034 | parent = parent->parent) | |
3035 | if ((parent_a = parent->regno_allocno_map[regno]) == NULL | |
1756cb66 VM |
3036 | || (parent_a |
3037 | == regno_top_level_allocno_map[REGNO | |
3038 | (allocno_emit_reg (parent_a))] | |
3039 | && ALLOCNO_EMIT_DATA (parent_a)->mem_optimized_dest_p)) | |
82b33628 VM |
3040 | break; |
3041 | if (parent == NULL || parent_a == NULL) | |
3042 | continue; | |
ac0ab4f7 | 3043 | |
3c55880a BS |
3044 | copy_allocno_live_ranges (a, parent_a); |
3045 | merge_hard_reg_conflicts (a, parent_a, true); | |
ac0ab4f7 | 3046 | |
ea1c67e6 VM |
3047 | ALLOCNO_CALL_FREQ (parent_a) += ALLOCNO_CALL_FREQ (a); |
3048 | ALLOCNO_CALLS_CROSSED_NUM (parent_a) | |
3049 | += ALLOCNO_CALLS_CROSSED_NUM (a); | |
e384e6b5 BS |
3050 | ALLOCNO_CHEAP_CALLS_CROSSED_NUM (parent_a) |
3051 | += ALLOCNO_CHEAP_CALLS_CROSSED_NUM (a); | |
6c476222 RS |
3052 | ALLOCNO_CROSSED_CALLS_ABIS (parent_a) |
3053 | |= ALLOCNO_CROSSED_CALLS_ABIS (a); | |
44942965 RS |
3054 | ALLOCNO_CROSSED_CALLS_CLOBBERED_REGS (parent_a) |
3055 | |= ALLOCNO_CROSSED_CALLS_CLOBBERED_REGS (a); | |
ea1c67e6 VM |
3056 | ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (parent_a) |
3057 | += ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (a); | |
82b33628 VM |
3058 | merged_p = true; |
3059 | } | |
3060 | return merged_p; | |
058e97ec VM |
3061 | } |
3062 | ||
3063 | /* Flatten the IR. In other words, this function transforms IR as if | |
3064 | it were built with one region (without loops). We could make it | |
3065 | much simpler by rebuilding IR with one region, but unfortunately it | |
3066 | takes a lot of time. MAX_REGNO_BEFORE_EMIT and | |
3067 | IRA_MAX_POINT_BEFORE_EMIT are correspondingly MAX_REG_NUM () and | |
3068 | IRA_MAX_POINT before emitting insns on the loop borders. */ | |
3069 | void | |
3070 | ira_flattening (int max_regno_before_emit, int ira_max_point_before_emit) | |
3071 | { | |
9140d27b | 3072 | int i, j; |
ea1c67e6 | 3073 | bool keep_p; |
058e97ec | 3074 | int hard_regs_num; |
82b33628 | 3075 | bool new_pseudos_p, merged_p, mem_dest_p; |
058e97ec | 3076 | unsigned int n; |
1756cb66 | 3077 | enum reg_class aclass; |
058e97ec | 3078 | ira_allocno_t a, parent_a, first, second, node_first, node_second; |
058e97ec | 3079 | ira_copy_t cp; |
029da7d4 | 3080 | ira_loop_tree_node_t node; |
b14151b5 | 3081 | live_range_t r; |
058e97ec VM |
3082 | ira_allocno_iterator ai; |
3083 | ira_copy_iterator ci; | |
058e97ec VM |
3084 | |
3085 | regno_top_level_allocno_map | |
1756cb66 VM |
3086 | = (ira_allocno_t *) ira_allocate (max_reg_num () |
3087 | * sizeof (ira_allocno_t)); | |
058e97ec VM |
3088 | memset (regno_top_level_allocno_map, 0, |
3089 | max_reg_num () * sizeof (ira_allocno_t)); | |
058e97ec | 3090 | new_pseudos_p = merged_p = false; |
0ca9fa56 VM |
3091 | FOR_EACH_ALLOCNO (a, ai) |
3092 | { | |
ac0ab4f7 BS |
3093 | ira_allocno_object_iterator oi; |
3094 | ira_object_t obj; | |
1756cb66 | 3095 | |
0ca9fa56 VM |
3096 | if (ALLOCNO_CAP_MEMBER (a) != NULL) |
3097 | /* Caps are not in the regno allocno maps and they are never | |
3098 | will be transformed into allocnos existing after IR | |
3099 | flattening. */ | |
3100 | continue; | |
ac0ab4f7 | 3101 | FOR_EACH_ALLOCNO_OBJECT (a, obj, oi) |
6576d245 RS |
3102 | OBJECT_TOTAL_CONFLICT_HARD_REGS (obj) |
3103 | = OBJECT_CONFLICT_HARD_REGS (obj); | |
0ca9fa56 VM |
3104 | #ifdef STACK_REGS |
3105 | ALLOCNO_TOTAL_NO_STACK_REG_P (a) = ALLOCNO_NO_STACK_REG_P (a); | |
3106 | #endif | |
3107 | } | |
058e97ec VM |
3108 | /* Fix final allocno attributes. */ |
3109 | for (i = max_regno_before_emit - 1; i >= FIRST_PSEUDO_REGISTER; i--) | |
3110 | { | |
0ca9fa56 | 3111 | mem_dest_p = false; |
058e97ec VM |
3112 | for (a = ira_regno_allocno_map[i]; |
3113 | a != NULL; | |
3114 | a = ALLOCNO_NEXT_REGNO_ALLOCNO (a)) | |
3115 | { | |
1756cb66 VM |
3116 | ira_emit_data_t parent_data, data = ALLOCNO_EMIT_DATA (a); |
3117 | ||
058e97ec | 3118 | ira_assert (ALLOCNO_CAP_MEMBER (a) == NULL); |
1756cb66 | 3119 | if (data->somewhere_renamed_p) |
058e97ec | 3120 | new_pseudos_p = true; |
029da7d4 BS |
3121 | parent_a = ira_parent_allocno (a); |
3122 | if (parent_a == NULL) | |
058e97ec VM |
3123 | { |
3124 | ALLOCNO_COPIES (a) = NULL; | |
1756cb66 | 3125 | regno_top_level_allocno_map[REGNO (data->reg)] = a; |
058e97ec VM |
3126 | continue; |
3127 | } | |
3128 | ira_assert (ALLOCNO_CAP_MEMBER (parent_a) == NULL); | |
b8698a0f | 3129 | |
1756cb66 | 3130 | if (data->mem_optimized_dest != NULL) |
82b33628 | 3131 | mem_dest_p = true; |
1756cb66 VM |
3132 | parent_data = ALLOCNO_EMIT_DATA (parent_a); |
3133 | if (REGNO (data->reg) == REGNO (parent_data->reg)) | |
058e97ec | 3134 | { |
3c55880a BS |
3135 | merge_hard_reg_conflicts (a, parent_a, true); |
3136 | move_allocno_live_ranges (a, parent_a); | |
058e97ec | 3137 | merged_p = true; |
1756cb66 VM |
3138 | parent_data->mem_optimized_dest_p |
3139 | = (parent_data->mem_optimized_dest_p | |
3140 | || data->mem_optimized_dest_p); | |
058e97ec VM |
3141 | continue; |
3142 | } | |
3143 | new_pseudos_p = true; | |
058e97ec VM |
3144 | for (;;) |
3145 | { | |
058e97ec VM |
3146 | ALLOCNO_NREFS (parent_a) -= ALLOCNO_NREFS (a); |
3147 | ALLOCNO_FREQ (parent_a) -= ALLOCNO_FREQ (a); | |
ea1c67e6 VM |
3148 | ALLOCNO_CALL_FREQ (parent_a) -= ALLOCNO_CALL_FREQ (a); |
3149 | ALLOCNO_CALLS_CROSSED_NUM (parent_a) | |
3150 | -= ALLOCNO_CALLS_CROSSED_NUM (a); | |
e384e6b5 BS |
3151 | ALLOCNO_CHEAP_CALLS_CROSSED_NUM (parent_a) |
3152 | -= ALLOCNO_CHEAP_CALLS_CROSSED_NUM (a); | |
6c476222 RS |
3153 | /* Assume that ALLOCNO_CROSSED_CALLS_ABIS and |
3154 | ALLOCNO_CROSSED_CALLS_CLOBBERED_REGS stay the same. | |
3155 | We'd need to rebuild the IR to do better. */ | |
ea1c67e6 VM |
3156 | ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (parent_a) |
3157 | -= ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (a); | |
058e97ec VM |
3158 | ira_assert (ALLOCNO_CALLS_CROSSED_NUM (parent_a) >= 0 |
3159 | && ALLOCNO_NREFS (parent_a) >= 0 | |
3160 | && ALLOCNO_FREQ (parent_a) >= 0); | |
1756cb66 VM |
3161 | aclass = ALLOCNO_CLASS (parent_a); |
3162 | hard_regs_num = ira_class_hard_regs_num[aclass]; | |
058e97ec VM |
3163 | if (ALLOCNO_HARD_REG_COSTS (a) != NULL |
3164 | && ALLOCNO_HARD_REG_COSTS (parent_a) != NULL) | |
3165 | for (j = 0; j < hard_regs_num; j++) | |
3166 | ALLOCNO_HARD_REG_COSTS (parent_a)[j] | |
3167 | -= ALLOCNO_HARD_REG_COSTS (a)[j]; | |
3168 | if (ALLOCNO_CONFLICT_HARD_REG_COSTS (a) != NULL | |
3169 | && ALLOCNO_CONFLICT_HARD_REG_COSTS (parent_a) != NULL) | |
3170 | for (j = 0; j < hard_regs_num; j++) | |
3171 | ALLOCNO_CONFLICT_HARD_REG_COSTS (parent_a)[j] | |
3172 | -= ALLOCNO_CONFLICT_HARD_REG_COSTS (a)[j]; | |
1756cb66 VM |
3173 | ALLOCNO_CLASS_COST (parent_a) |
3174 | -= ALLOCNO_CLASS_COST (a); | |
058e97ec | 3175 | ALLOCNO_MEMORY_COST (parent_a) -= ALLOCNO_MEMORY_COST (a); |
029da7d4 BS |
3176 | parent_a = ira_parent_allocno (parent_a); |
3177 | if (parent_a == NULL) | |
058e97ec VM |
3178 | break; |
3179 | } | |
058e97ec | 3180 | ALLOCNO_COPIES (a) = NULL; |
1756cb66 | 3181 | regno_top_level_allocno_map[REGNO (data->reg)] = a; |
058e97ec | 3182 | } |
801f03e3 | 3183 | if (mem_dest_p && copy_info_to_removed_store_destinations (i)) |
82b33628 | 3184 | merged_p = true; |
058e97ec | 3185 | } |
058e97ec VM |
3186 | ira_assert (new_pseudos_p || ira_max_point_before_emit == ira_max_point); |
3187 | if (merged_p || ira_max_point_before_emit != ira_max_point) | |
3188 | ira_rebuild_start_finish_chains (); | |
3189 | if (new_pseudos_p) | |
3190 | { | |
9140d27b BS |
3191 | sparseset objects_live; |
3192 | ||
058e97ec VM |
3193 | /* Rebuild conflicts. */ |
3194 | FOR_EACH_ALLOCNO (a, ai) | |
3195 | { | |
ac0ab4f7 BS |
3196 | ira_allocno_object_iterator oi; |
3197 | ira_object_t obj; | |
1756cb66 VM |
3198 | |
3199 | if (a != regno_top_level_allocno_map[REGNO (allocno_emit_reg (a))] | |
058e97ec VM |
3200 | || ALLOCNO_CAP_MEMBER (a) != NULL) |
3201 | continue; | |
ac0ab4f7 BS |
3202 | FOR_EACH_ALLOCNO_OBJECT (a, obj, oi) |
3203 | { | |
3204 | for (r = OBJECT_LIVE_RANGES (obj); r != NULL; r = r->next) | |
3205 | ira_assert (r->object == obj); | |
3206 | clear_conflicts (obj); | |
3207 | } | |
058e97ec | 3208 | } |
9140d27b | 3209 | objects_live = sparseset_alloc (ira_objects_num); |
058e97ec VM |
3210 | for (i = 0; i < ira_max_point; i++) |
3211 | { | |
3212 | for (r = ira_start_point_ranges[i]; r != NULL; r = r->start_next) | |
3213 | { | |
9140d27b | 3214 | ira_object_t obj = r->object; |
1756cb66 | 3215 | |
9140d27b | 3216 | a = OBJECT_ALLOCNO (obj); |
1756cb66 | 3217 | if (a != regno_top_level_allocno_map[REGNO (allocno_emit_reg (a))] |
058e97ec VM |
3218 | || ALLOCNO_CAP_MEMBER (a) != NULL) |
3219 | continue; | |
ac0ab4f7 | 3220 | |
1756cb66 | 3221 | aclass = ALLOCNO_CLASS (a); |
9140d27b | 3222 | EXECUTE_IF_SET_IN_SPARSESET (objects_live, n) |
058e97ec | 3223 | { |
9140d27b BS |
3224 | ira_object_t live_obj = ira_object_id_map[n]; |
3225 | ira_allocno_t live_a = OBJECT_ALLOCNO (live_obj); | |
1756cb66 VM |
3226 | enum reg_class live_aclass = ALLOCNO_CLASS (live_a); |
3227 | ||
3228 | if (ira_reg_classes_intersect_p[aclass][live_aclass] | |
058e97ec | 3229 | /* Don't set up conflict for the allocno with itself. */ |
9140d27b BS |
3230 | && live_a != a) |
3231 | ira_add_conflict (obj, live_obj); | |
058e97ec | 3232 | } |
3feb0298 | 3233 | sparseset_set_bit (objects_live, OBJECT_CONFLICT_ID (obj)); |
058e97ec | 3234 | } |
b8698a0f | 3235 | |
058e97ec | 3236 | for (r = ira_finish_point_ranges[i]; r != NULL; r = r->finish_next) |
9140d27b | 3237 | sparseset_clear_bit (objects_live, OBJECT_CONFLICT_ID (r->object)); |
058e97ec | 3238 | } |
9140d27b | 3239 | sparseset_free (objects_live); |
058e97ec VM |
3240 | compress_conflict_vecs (); |
3241 | } | |
3242 | /* Mark some copies for removing and change allocnos in the rest | |
3243 | copies. */ | |
3244 | FOR_EACH_COPY (cp, ci) | |
3245 | { | |
3246 | if (ALLOCNO_CAP_MEMBER (cp->first) != NULL | |
3247 | || ALLOCNO_CAP_MEMBER (cp->second) != NULL) | |
3248 | { | |
3249 | if (internal_flag_ira_verbose > 4 && ira_dump_file != NULL) | |
3250 | fprintf | |
3251 | (ira_dump_file, " Remove cp%d:%c%dr%d-%c%dr%d\n", | |
3252 | cp->num, ALLOCNO_CAP_MEMBER (cp->first) != NULL ? 'c' : 'a', | |
1756cb66 VM |
3253 | ALLOCNO_NUM (cp->first), |
3254 | REGNO (allocno_emit_reg (cp->first)), | |
058e97ec | 3255 | ALLOCNO_CAP_MEMBER (cp->second) != NULL ? 'c' : 'a', |
1756cb66 VM |
3256 | ALLOCNO_NUM (cp->second), |
3257 | REGNO (allocno_emit_reg (cp->second))); | |
058e97ec VM |
3258 | cp->loop_tree_node = NULL; |
3259 | continue; | |
3260 | } | |
1756cb66 VM |
3261 | first |
3262 | = regno_top_level_allocno_map[REGNO (allocno_emit_reg (cp->first))]; | |
3263 | second | |
3264 | = regno_top_level_allocno_map[REGNO (allocno_emit_reg (cp->second))]; | |
058e97ec VM |
3265 | node = cp->loop_tree_node; |
3266 | if (node == NULL) | |
3267 | keep_p = true; /* It copy generated in ira-emit.c. */ | |
3268 | else | |
3269 | { | |
3270 | /* Check that the copy was not propagated from level on | |
3271 | which we will have different pseudos. */ | |
3272 | node_first = node->regno_allocno_map[ALLOCNO_REGNO (cp->first)]; | |
3273 | node_second = node->regno_allocno_map[ALLOCNO_REGNO (cp->second)]; | |
1756cb66 VM |
3274 | keep_p = ((REGNO (allocno_emit_reg (first)) |
3275 | == REGNO (allocno_emit_reg (node_first))) | |
3276 | && (REGNO (allocno_emit_reg (second)) | |
3277 | == REGNO (allocno_emit_reg (node_second)))); | |
058e97ec VM |
3278 | } |
3279 | if (keep_p) | |
3280 | { | |
3281 | cp->loop_tree_node = ira_loop_tree_root; | |
3282 | cp->first = first; | |
3283 | cp->second = second; | |
3284 | } | |
3285 | else | |
3286 | { | |
3287 | cp->loop_tree_node = NULL; | |
3288 | if (internal_flag_ira_verbose > 4 && ira_dump_file != NULL) | |
3289 | fprintf (ira_dump_file, " Remove cp%d:a%dr%d-a%dr%d\n", | |
3290 | cp->num, ALLOCNO_NUM (cp->first), | |
1756cb66 VM |
3291 | REGNO (allocno_emit_reg (cp->first)), |
3292 | ALLOCNO_NUM (cp->second), | |
3293 | REGNO (allocno_emit_reg (cp->second))); | |
058e97ec VM |
3294 | } |
3295 | } | |
3296 | /* Remove unnecessary allocnos on lower levels of the loop tree. */ | |
3297 | FOR_EACH_ALLOCNO (a, ai) | |
3298 | { | |
1756cb66 | 3299 | if (a != regno_top_level_allocno_map[REGNO (allocno_emit_reg (a))] |
058e97ec VM |
3300 | || ALLOCNO_CAP_MEMBER (a) != NULL) |
3301 | { | |
3302 | if (internal_flag_ira_verbose > 4 && ira_dump_file != NULL) | |
3303 | fprintf (ira_dump_file, " Remove a%dr%d\n", | |
1756cb66 | 3304 | ALLOCNO_NUM (a), REGNO (allocno_emit_reg (a))); |
3b6d1699 | 3305 | ira_remove_allocno_prefs (a); |
058e97ec VM |
3306 | finish_allocno (a); |
3307 | continue; | |
3308 | } | |
3309 | ALLOCNO_LOOP_TREE_NODE (a) = ira_loop_tree_root; | |
1756cb66 | 3310 | ALLOCNO_REGNO (a) = REGNO (allocno_emit_reg (a)); |
058e97ec | 3311 | ALLOCNO_CAP (a) = NULL; |
cb1ca6ac | 3312 | /* Restore updated costs for assignments from reload. */ |
058e97ec | 3313 | ALLOCNO_UPDATED_MEMORY_COST (a) = ALLOCNO_MEMORY_COST (a); |
1756cb66 | 3314 | ALLOCNO_UPDATED_CLASS_COST (a) = ALLOCNO_CLASS_COST (a); |
058e97ec VM |
3315 | if (! ALLOCNO_ASSIGNED_P (a)) |
3316 | ira_free_allocno_updated_costs (a); | |
3317 | ira_assert (ALLOCNO_UPDATED_HARD_REG_COSTS (a) == NULL); | |
3318 | ira_assert (ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a) == NULL); | |
3319 | } | |
3320 | /* Remove unnecessary copies. */ | |
3321 | FOR_EACH_COPY (cp, ci) | |
3322 | { | |
3323 | if (cp->loop_tree_node == NULL) | |
3324 | { | |
3325 | ira_copies[cp->num] = NULL; | |
3326 | finish_copy (cp); | |
3327 | continue; | |
3328 | } | |
3329 | ira_assert | |
3330 | (ALLOCNO_LOOP_TREE_NODE (cp->first) == ira_loop_tree_root | |
3331 | && ALLOCNO_LOOP_TREE_NODE (cp->second) == ira_loop_tree_root); | |
3b6d1699 VM |
3332 | add_allocno_copy_to_list (cp); |
3333 | swap_allocno_copy_ends_if_necessary (cp); | |
058e97ec VM |
3334 | } |
3335 | rebuild_regno_allocno_maps (); | |
b15a7ae6 VM |
3336 | if (ira_max_point != ira_max_point_before_emit) |
3337 | ira_compress_allocno_live_ranges (); | |
058e97ec VM |
3338 | ira_free (regno_top_level_allocno_map); |
3339 | } | |
3340 | ||
3341 | \f | |
3342 | ||
3343 | #ifdef ENABLE_IRA_CHECKING | |
3344 | /* Check creation of all allocnos. Allocnos on lower levels should | |
3345 | have allocnos or caps on all upper levels. */ | |
3346 | static void | |
3347 | check_allocno_creation (void) | |
3348 | { | |
3349 | ira_allocno_t a; | |
3350 | ira_allocno_iterator ai; | |
3351 | ira_loop_tree_node_t loop_tree_node; | |
3352 | ||
3353 | FOR_EACH_ALLOCNO (a, ai) | |
3354 | { | |
49d988e7 VM |
3355 | loop_tree_node = ALLOCNO_LOOP_TREE_NODE (a); |
3356 | ira_assert (bitmap_bit_p (loop_tree_node->all_allocnos, | |
3357 | ALLOCNO_NUM (a))); | |
3358 | if (loop_tree_node == ira_loop_tree_root) | |
058e97ec VM |
3359 | continue; |
3360 | if (ALLOCNO_CAP_MEMBER (a) != NULL) | |
49d988e7 | 3361 | ira_assert (ALLOCNO_CAP (a) != NULL); |
058e97ec | 3362 | else if (ALLOCNO_CAP (a) == NULL) |
49d988e7 VM |
3363 | ira_assert (loop_tree_node->parent |
3364 | ->regno_allocno_map[ALLOCNO_REGNO (a)] != NULL | |
3365 | && bitmap_bit_p (loop_tree_node->border_allocnos, | |
3366 | ALLOCNO_NUM (a))); | |
058e97ec VM |
3367 | } |
3368 | } | |
3369 | #endif | |
3370 | ||
4ac293e2 VM |
3371 | /* Identify allocnos which prefer a register class with a single hard register. |
3372 | Adjust ALLOCNO_CONFLICT_HARD_REG_COSTS so that conflicting allocnos are | |
3373 | less likely to use the preferred singleton register. */ | |
3374 | static void | |
3375 | update_conflict_hard_reg_costs (void) | |
3376 | { | |
3377 | ira_allocno_t a; | |
3378 | ira_allocno_iterator ai; | |
3379 | int i, index, min; | |
3380 | ||
3381 | FOR_EACH_ALLOCNO (a, ai) | |
3382 | { | |
6f76a878 AS |
3383 | reg_class_t aclass = ALLOCNO_CLASS (a); |
3384 | reg_class_t pref = reg_preferred_class (ALLOCNO_REGNO (a)); | |
c9d74da6 RS |
3385 | int singleton = ira_class_singleton[pref][ALLOCNO_MODE (a)]; |
3386 | if (singleton < 0) | |
4ac293e2 | 3387 | continue; |
c9d74da6 | 3388 | index = ira_class_hard_reg_index[(int) aclass][singleton]; |
4ac293e2 VM |
3389 | if (index < 0) |
3390 | continue; | |
3391 | if (ALLOCNO_CONFLICT_HARD_REG_COSTS (a) == NULL | |
3392 | || ALLOCNO_HARD_REG_COSTS (a) == NULL) | |
3393 | continue; | |
3394 | min = INT_MAX; | |
6f76a878 | 3395 | for (i = ira_class_hard_regs_num[(int) aclass] - 1; i >= 0; i--) |
1756cb66 | 3396 | if (ALLOCNO_HARD_REG_COSTS (a)[i] > ALLOCNO_CLASS_COST (a) |
4ac293e2 VM |
3397 | && min > ALLOCNO_HARD_REG_COSTS (a)[i]) |
3398 | min = ALLOCNO_HARD_REG_COSTS (a)[i]; | |
3399 | if (min == INT_MAX) | |
3400 | continue; | |
3401 | ira_allocate_and_set_costs (&ALLOCNO_CONFLICT_HARD_REG_COSTS (a), | |
1756cb66 | 3402 | aclass, 0); |
4ac293e2 | 3403 | ALLOCNO_CONFLICT_HARD_REG_COSTS (a)[index] |
1756cb66 | 3404 | -= min - ALLOCNO_CLASS_COST (a); |
4ac293e2 VM |
3405 | } |
3406 | } | |
3407 | ||
058e97ec | 3408 | /* Create a internal representation (IR) for IRA (allocnos, copies, |
2608d841 VM |
3409 | loop tree nodes). The function returns TRUE if we generate loop |
3410 | structure (besides nodes representing all function and the basic | |
3411 | blocks) for regional allocation. A true return means that we | |
3412 | really need to flatten IR before the reload. */ | |
058e97ec | 3413 | bool |
2608d841 | 3414 | ira_build (void) |
058e97ec | 3415 | { |
2608d841 | 3416 | bool loops_p; |
058e97ec | 3417 | |
2608d841 | 3418 | df_analyze (); |
058e97ec VM |
3419 | initiate_cost_vectors (); |
3420 | initiate_allocnos (); | |
3b6d1699 | 3421 | initiate_prefs (); |
058e97ec | 3422 | initiate_copies (); |
2608d841 | 3423 | create_loop_tree_nodes (); |
058e97ec VM |
3424 | form_loop_tree (); |
3425 | create_allocnos (); | |
3426 | ira_costs (); | |
a49ae217 | 3427 | create_allocno_objects (); |
058e97ec | 3428 | ira_create_allocno_live_ranges (); |
311aab06 | 3429 | remove_unnecessary_regions (false); |
b15a7ae6 | 3430 | ira_compress_allocno_live_ranges (); |
927425df | 3431 | update_bad_spill_attribute (); |
058e97ec VM |
3432 | loops_p = more_one_region_p (); |
3433 | if (loops_p) | |
3434 | { | |
3435 | propagate_allocno_info (); | |
3436 | create_caps (); | |
3437 | } | |
1756cb66 | 3438 | ira_tune_allocno_costs (); |
058e97ec VM |
3439 | #ifdef ENABLE_IRA_CHECKING |
3440 | check_allocno_creation (); | |
3441 | #endif | |
3442 | setup_min_max_allocno_live_range_point (); | |
a49ae217 | 3443 | sort_conflict_id_map (); |
058e97ec VM |
3444 | setup_min_max_conflict_allocno_ids (); |
3445 | ira_build_conflicts (); | |
4ac293e2 | 3446 | update_conflict_hard_reg_costs (); |
311aab06 VM |
3447 | if (! ira_conflicts_p) |
3448 | { | |
3449 | ira_allocno_t a; | |
3450 | ira_allocno_iterator ai; | |
3451 | ||
3452 | /* Remove all regions but root one. */ | |
3453 | if (loops_p) | |
3454 | { | |
3455 | remove_unnecessary_regions (true); | |
3456 | loops_p = false; | |
3457 | } | |
3458 | /* We don't save hard registers around calls for fast allocation | |
3459 | -- add caller clobbered registers as conflicting ones to | |
3460 | allocno crossing calls. */ | |
3461 | FOR_EACH_ALLOCNO (a, ai) | |
3462 | if (ALLOCNO_CALLS_CROSSED_NUM (a) != 0) | |
6c476222 | 3463 | ior_hard_reg_conflicts (a, ira_need_caller_save_regs (a)); |
311aab06 | 3464 | } |
4cda38d5 VM |
3465 | if (internal_flag_ira_verbose > 2 && ira_dump_file != NULL) |
3466 | print_copies (ira_dump_file); | |
3b6d1699 VM |
3467 | if (internal_flag_ira_verbose > 2 && ira_dump_file != NULL) |
3468 | print_prefs (ira_dump_file); | |
058e97ec VM |
3469 | if (internal_flag_ira_verbose > 0 && ira_dump_file != NULL) |
3470 | { | |
ac0ab4f7 | 3471 | int n, nr, nr_big; |
058e97ec | 3472 | ira_allocno_t a; |
b14151b5 | 3473 | live_range_t r; |
058e97ec VM |
3474 | ira_allocno_iterator ai; |
3475 | ||
3476 | n = 0; | |
ac0ab4f7 BS |
3477 | nr = 0; |
3478 | nr_big = 0; | |
058e97ec | 3479 | FOR_EACH_ALLOCNO (a, ai) |
a49ae217 | 3480 | { |
ac0ab4f7 | 3481 | int j, nobj = ALLOCNO_NUM_OBJECTS (a); |
1756cb66 | 3482 | |
ac0ab4f7 BS |
3483 | if (nobj > 1) |
3484 | nr_big++; | |
3485 | for (j = 0; j < nobj; j++) | |
3486 | { | |
3487 | ira_object_t obj = ALLOCNO_OBJECT (a, j); | |
3488 | n += OBJECT_NUM_CONFLICTS (obj); | |
3489 | for (r = OBJECT_LIVE_RANGES (obj); r != NULL; r = r->next) | |
3490 | nr++; | |
3491 | } | |
a49ae217 | 3492 | } |
058e97ec | 3493 | fprintf (ira_dump_file, " regions=%d, blocks=%d, points=%d\n", |
0fc822d0 | 3494 | current_loops == NULL ? 1 : number_of_loops (cfun), |
0cae8d31 | 3495 | n_basic_blocks_for_fn (cfun), ira_max_point); |
058e97ec | 3496 | fprintf (ira_dump_file, |
ac0ab4f7 BS |
3497 | " allocnos=%d (big %d), copies=%d, conflicts=%d, ranges=%d\n", |
3498 | ira_allocnos_num, nr_big, ira_copies_num, n, nr); | |
058e97ec VM |
3499 | } |
3500 | return loops_p; | |
3501 | } | |
3502 | ||
3503 | /* Release the data created by function ira_build. */ | |
3504 | void | |
3505 | ira_destroy (void) | |
3506 | { | |
3507 | finish_loop_tree_nodes (); | |
3b6d1699 | 3508 | finish_prefs (); |
058e97ec VM |
3509 | finish_copies (); |
3510 | finish_allocnos (); | |
3511 | finish_cost_vectors (); | |
3512 | ira_finish_allocno_live_ranges (); | |
3513 | } |