| File: | build/gcc/ira-color.cc |
| Warning: | line 3657, column 6 Value stored to 'regno' is never read |
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| 1 | /* IRA allocation based on graph coloring. |
| 2 | Copyright (C) 2006-2023 Free Software Foundation, Inc. |
| 3 | Contributed by Vladimir Makarov <vmakarov@redhat.com>. |
| 4 | |
| 5 | This file is part of GCC. |
| 6 | |
| 7 | GCC is free software; you can redistribute it and/or modify it under |
| 8 | the terms of the GNU General Public License as published by the Free |
| 9 | Software Foundation; either version 3, or (at your option) any later |
| 10 | version. |
| 11 | |
| 12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| 13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 15 | for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with GCC; see the file COPYING3. If not see |
| 19 | <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "config.h" |
| 22 | #include "system.h" |
| 23 | #include "coretypes.h" |
| 24 | #include "backend.h" |
| 25 | #include "target.h" |
| 26 | #include "rtl.h" |
| 27 | #include "tree.h" |
| 28 | #include "predict.h" |
| 29 | #include "df.h" |
| 30 | #include "memmodel.h" |
| 31 | #include "tm_p.h" |
| 32 | #include "insn-config.h" |
| 33 | #include "regs.h" |
| 34 | #include "ira.h" |
| 35 | #include "ira-int.h" |
| 36 | #include "reload.h" |
| 37 | #include "cfgloop.h" |
| 38 | |
| 39 | /* To prevent soft conflict detection becoming quadratic in the |
| 40 | loop depth. Only for very pathological cases, so it hardly |
| 41 | seems worth a --param. */ |
| 42 | const int max_soft_conflict_loop_depth = 64; |
| 43 | |
| 44 | typedef struct allocno_hard_regs *allocno_hard_regs_t; |
| 45 | |
| 46 | /* The structure contains information about hard registers can be |
| 47 | assigned to allocnos. Usually it is allocno profitable hard |
| 48 | registers but in some cases this set can be a bit different. Major |
| 49 | reason of the difference is a requirement to use hard register sets |
| 50 | that form a tree or a forest (set of trees), i.e. hard register set |
| 51 | of a node should contain hard register sets of its subnodes. */ |
| 52 | struct allocno_hard_regs |
| 53 | { |
| 54 | /* Hard registers can be assigned to an allocno. */ |
| 55 | HARD_REG_SET set; |
| 56 | /* Overall (spilling) cost of all allocnos with given register |
| 57 | set. */ |
| 58 | int64_t cost; |
| 59 | }; |
| 60 | |
| 61 | typedef struct allocno_hard_regs_node *allocno_hard_regs_node_t; |
| 62 | |
| 63 | /* A node representing allocno hard registers. Such nodes form a |
| 64 | forest (set of trees). Each subnode of given node in the forest |
| 65 | refers for hard register set (usually allocno profitable hard |
| 66 | register set) which is a subset of one referred from given |
| 67 | node. */ |
| 68 | struct allocno_hard_regs_node |
| 69 | { |
| 70 | /* Set up number of the node in preorder traversing of the forest. */ |
| 71 | int preorder_num; |
| 72 | /* Used for different calculation like finding conflict size of an |
| 73 | allocno. */ |
| 74 | int check; |
| 75 | /* Used for calculation of conflict size of an allocno. The |
| 76 | conflict size of the allocno is maximal number of given allocno |
| 77 | hard registers needed for allocation of the conflicting allocnos. |
| 78 | Given allocno is trivially colored if this number plus the number |
| 79 | of hard registers needed for given allocno is not greater than |
| 80 | the number of given allocno hard register set. */ |
| 81 | int conflict_size; |
| 82 | /* The number of hard registers given by member hard_regs. */ |
| 83 | int hard_regs_num; |
| 84 | /* The following member is used to form the final forest. */ |
| 85 | bool used_p; |
| 86 | /* Pointer to the corresponding profitable hard registers. */ |
| 87 | allocno_hard_regs_t hard_regs; |
| 88 | /* Parent, first subnode, previous and next node with the same |
| 89 | parent in the forest. */ |
| 90 | allocno_hard_regs_node_t parent, first, prev, next; |
| 91 | }; |
| 92 | |
| 93 | /* Info about changing hard reg costs of an allocno. */ |
| 94 | struct update_cost_record |
| 95 | { |
| 96 | /* Hard regno for which we changed the cost. */ |
| 97 | int hard_regno; |
| 98 | /* Divisor used when we changed the cost of HARD_REGNO. */ |
| 99 | int divisor; |
| 100 | /* Next record for given allocno. */ |
| 101 | struct update_cost_record *next; |
| 102 | }; |
| 103 | |
| 104 | /* To decrease footprint of ira_allocno structure we store all data |
| 105 | needed only for coloring in the following structure. */ |
| 106 | struct allocno_color_data |
| 107 | { |
| 108 | /* TRUE value means that the allocno was not removed yet from the |
| 109 | conflicting graph during coloring. */ |
| 110 | unsigned int in_graph_p : 1; |
| 111 | /* TRUE if it is put on the stack to make other allocnos |
| 112 | colorable. */ |
| 113 | unsigned int may_be_spilled_p : 1; |
| 114 | /* TRUE if the allocno is trivially colorable. */ |
| 115 | unsigned int colorable_p : 1; |
| 116 | /* Number of hard registers of the allocno class really |
| 117 | available for the allocno allocation. It is number of the |
| 118 | profitable hard regs. */ |
| 119 | int available_regs_num; |
| 120 | /* Sum of frequencies of hard register preferences of all |
| 121 | conflicting allocnos which are not the coloring stack yet. */ |
| 122 | int conflict_allocno_hard_prefs; |
| 123 | /* Allocnos in a bucket (used in coloring) chained by the following |
| 124 | two members. */ |
| 125 | ira_allocno_t next_bucket_allocno; |
| 126 | ira_allocno_t prev_bucket_allocno; |
| 127 | /* Used for temporary purposes. */ |
| 128 | int temp; |
| 129 | /* Used to exclude repeated processing. */ |
| 130 | int last_process; |
| 131 | /* Profitable hard regs available for this pseudo allocation. It |
| 132 | means that the set excludes unavailable hard regs and hard regs |
| 133 | conflicting with given pseudo. They should be of the allocno |
| 134 | class. */ |
| 135 | HARD_REG_SET profitable_hard_regs; |
| 136 | /* The allocno hard registers node. */ |
| 137 | allocno_hard_regs_node_t hard_regs_node; |
| 138 | /* Array of structures allocno_hard_regs_subnode representing |
| 139 | given allocno hard registers node (the 1st element in the array) |
| 140 | and all its subnodes in the tree (forest) of allocno hard |
| 141 | register nodes (see comments above). */ |
| 142 | int hard_regs_subnodes_start; |
| 143 | /* The length of the previous array. */ |
| 144 | int hard_regs_subnodes_num; |
| 145 | /* Records about updating allocno hard reg costs from copies. If |
| 146 | the allocno did not get expected hard register, these records are |
| 147 | used to restore original hard reg costs of allocnos connected to |
| 148 | this allocno by copies. */ |
| 149 | struct update_cost_record *update_cost_records; |
| 150 | /* Threads. We collect allocnos connected by copies into threads |
| 151 | and try to assign hard regs to allocnos by threads. */ |
| 152 | /* Allocno representing all thread. */ |
| 153 | ira_allocno_t first_thread_allocno; |
| 154 | /* Allocnos in thread forms a cycle list through the following |
| 155 | member. */ |
| 156 | ira_allocno_t next_thread_allocno; |
| 157 | /* All thread frequency. Defined only for first thread allocno. */ |
| 158 | int thread_freq; |
| 159 | /* Sum of frequencies of hard register preferences of the allocno. */ |
| 160 | int hard_reg_prefs; |
| 161 | }; |
| 162 | |
| 163 | /* See above. */ |
| 164 | typedef struct allocno_color_data *allocno_color_data_t; |
| 165 | |
| 166 | /* Container for storing allocno data concerning coloring. */ |
| 167 | static allocno_color_data_t allocno_color_data; |
| 168 | |
| 169 | /* Macro to access the data concerning coloring. */ |
| 170 | #define ALLOCNO_COLOR_DATA(a)((allocno_color_data_t) ((a)->add_data)) ((allocno_color_data_t) ALLOCNO_ADD_DATA (a)((a)->add_data)) |
| 171 | |
| 172 | /* Used for finding allocno colorability to exclude repeated allocno |
| 173 | processing and for updating preferencing to exclude repeated |
| 174 | allocno processing during assignment. */ |
| 175 | static int curr_allocno_process; |
| 176 | |
| 177 | /* This file contains code for regional graph coloring, spill/restore |
| 178 | code placement optimization, and code helping the reload pass to do |
| 179 | a better job. */ |
| 180 | |
| 181 | /* Bitmap of allocnos which should be colored. */ |
| 182 | static bitmap coloring_allocno_bitmap; |
| 183 | |
| 184 | /* Bitmap of allocnos which should be taken into account during |
| 185 | coloring. In general case it contains allocnos from |
| 186 | coloring_allocno_bitmap plus other already colored conflicting |
| 187 | allocnos. */ |
| 188 | static bitmap consideration_allocno_bitmap; |
| 189 | |
| 190 | /* All allocnos sorted according their priorities. */ |
| 191 | static ira_allocno_t *sorted_allocnos; |
| 192 | |
| 193 | /* Vec representing the stack of allocnos used during coloring. */ |
| 194 | static vec<ira_allocno_t> allocno_stack_vec; |
| 195 | |
| 196 | /* Helper for qsort comparison callbacks - return a positive integer if |
| 197 | X > Y, or a negative value otherwise. Use a conditional expression |
| 198 | instead of a difference computation to insulate from possible overflow |
| 199 | issues, e.g. X - Y < 0 for some X > 0 and Y < 0. */ |
| 200 | #define SORTGT(x,y)(((x) > (y)) ? 1 : -1) (((x) > (y)) ? 1 : -1) |
| 201 | |
| 202 | |
| 203 | |
| 204 | /* Definition of vector of allocno hard registers. */ |
| 205 | |
| 206 | /* Vector of unique allocno hard registers. */ |
| 207 | static vec<allocno_hard_regs_t> allocno_hard_regs_vec; |
| 208 | |
| 209 | struct allocno_hard_regs_hasher : nofree_ptr_hash <allocno_hard_regs> |
| 210 | { |
| 211 | static inline hashval_t hash (const allocno_hard_regs *); |
| 212 | static inline bool equal (const allocno_hard_regs *, |
| 213 | const allocno_hard_regs *); |
| 214 | }; |
| 215 | |
| 216 | /* Returns hash value for allocno hard registers V. */ |
| 217 | inline hashval_t |
| 218 | allocno_hard_regs_hasher::hash (const allocno_hard_regs *hv) |
| 219 | { |
| 220 | return iterative_hash (&hv->set, sizeof (HARD_REG_SET), 0); |
| 221 | } |
| 222 | |
| 223 | /* Compares allocno hard registers V1 and V2. */ |
| 224 | inline bool |
| 225 | allocno_hard_regs_hasher::equal (const allocno_hard_regs *hv1, |
| 226 | const allocno_hard_regs *hv2) |
| 227 | { |
| 228 | return hv1->set == hv2->set; |
| 229 | } |
| 230 | |
| 231 | /* Hash table of unique allocno hard registers. */ |
| 232 | static hash_table<allocno_hard_regs_hasher> *allocno_hard_regs_htab; |
| 233 | |
| 234 | /* Return allocno hard registers in the hash table equal to HV. */ |
| 235 | static allocno_hard_regs_t |
| 236 | find_hard_regs (allocno_hard_regs_t hv) |
| 237 | { |
| 238 | return allocno_hard_regs_htab->find (hv); |
| 239 | } |
| 240 | |
| 241 | /* Insert allocno hard registers HV in the hash table (if it is not |
| 242 | there yet) and return the value which in the table. */ |
| 243 | static allocno_hard_regs_t |
| 244 | insert_hard_regs (allocno_hard_regs_t hv) |
| 245 | { |
| 246 | allocno_hard_regs **slot = allocno_hard_regs_htab->find_slot (hv, INSERT); |
| 247 | |
| 248 | if (*slot == NULLnullptr) |
| 249 | *slot = hv; |
| 250 | return *slot; |
| 251 | } |
| 252 | |
| 253 | /* Initialize data concerning allocno hard registers. */ |
| 254 | static void |
| 255 | init_allocno_hard_regs (void) |
| 256 | { |
| 257 | allocno_hard_regs_vec.create (200); |
| 258 | allocno_hard_regs_htab |
| 259 | = new hash_table<allocno_hard_regs_hasher> (200); |
| 260 | } |
| 261 | |
| 262 | /* Add (or update info about) allocno hard registers with SET and |
| 263 | COST. */ |
| 264 | static allocno_hard_regs_t |
| 265 | add_allocno_hard_regs (HARD_REG_SET set, int64_t cost) |
| 266 | { |
| 267 | struct allocno_hard_regs temp; |
| 268 | allocno_hard_regs_t hv; |
| 269 | |
| 270 | gcc_assert (! hard_reg_set_empty_p (set))((void)(!(! hard_reg_set_empty_p (set)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 270, __FUNCTION__), 0 : 0)); |
| 271 | temp.set = set; |
| 272 | if ((hv = find_hard_regs (&temp)) != NULLnullptr) |
| 273 | hv->cost += cost; |
| 274 | else |
| 275 | { |
| 276 | hv = ((struct allocno_hard_regs *) |
| 277 | ira_allocate (sizeof (struct allocno_hard_regs))); |
| 278 | hv->set = set; |
| 279 | hv->cost = cost; |
| 280 | allocno_hard_regs_vec.safe_push (hv); |
| 281 | insert_hard_regs (hv); |
| 282 | } |
| 283 | return hv; |
| 284 | } |
| 285 | |
| 286 | /* Finalize data concerning allocno hard registers. */ |
| 287 | static void |
| 288 | finish_allocno_hard_regs (void) |
| 289 | { |
| 290 | int i; |
| 291 | allocno_hard_regs_t hv; |
| 292 | |
| 293 | for (i = 0; |
| 294 | allocno_hard_regs_vec.iterate (i, &hv); |
| 295 | i++) |
| 296 | ira_free (hv); |
| 297 | delete allocno_hard_regs_htab; |
| 298 | allocno_hard_regs_htab = NULLnullptr; |
| 299 | allocno_hard_regs_vec.release (); |
| 300 | } |
| 301 | |
| 302 | /* Sort hard regs according to their frequency of usage. */ |
| 303 | static int |
| 304 | allocno_hard_regs_compare (const void *v1p, const void *v2p) |
| 305 | { |
| 306 | allocno_hard_regs_t hv1 = *(const allocno_hard_regs_t *) v1p; |
| 307 | allocno_hard_regs_t hv2 = *(const allocno_hard_regs_t *) v2p; |
| 308 | |
| 309 | if (hv2->cost > hv1->cost) |
| 310 | return 1; |
| 311 | else if (hv2->cost < hv1->cost) |
| 312 | return -1; |
| 313 | return SORTGT (allocno_hard_regs_hasher::hash(hv2), allocno_hard_regs_hasher::hash(hv1))(((allocno_hard_regs_hasher::hash(hv2)) > (allocno_hard_regs_hasher ::hash(hv1))) ? 1 : -1); |
| 314 | } |
| 315 | |
| 316 | |
| 317 | |
| 318 | /* Used for finding a common ancestor of two allocno hard registers |
| 319 | nodes in the forest. We use the current value of |
| 320 | 'node_check_tick' to mark all nodes from one node to the top and |
| 321 | then walking up from another node until we find a marked node. |
| 322 | |
| 323 | It is also used to figure out allocno colorability as a mark that |
| 324 | we already reset value of member 'conflict_size' for the forest |
| 325 | node corresponding to the processed allocno. */ |
| 326 | static int node_check_tick; |
| 327 | |
| 328 | /* Roots of the forest containing hard register sets can be assigned |
| 329 | to allocnos. */ |
| 330 | static allocno_hard_regs_node_t hard_regs_roots; |
| 331 | |
| 332 | /* Definition of vector of allocno hard register nodes. */ |
| 333 | |
| 334 | /* Vector used to create the forest. */ |
| 335 | static vec<allocno_hard_regs_node_t> hard_regs_node_vec; |
| 336 | |
| 337 | /* Create and return allocno hard registers node containing allocno |
| 338 | hard registers HV. */ |
| 339 | static allocno_hard_regs_node_t |
| 340 | create_new_allocno_hard_regs_node (allocno_hard_regs_t hv) |
| 341 | { |
| 342 | allocno_hard_regs_node_t new_node; |
| 343 | |
| 344 | new_node = ((struct allocno_hard_regs_node *) |
| 345 | ira_allocate (sizeof (struct allocno_hard_regs_node))); |
| 346 | new_node->check = 0; |
| 347 | new_node->hard_regs = hv; |
| 348 | new_node->hard_regs_num = hard_reg_set_size (hv->set); |
| 349 | new_node->first = NULLnullptr; |
| 350 | new_node->used_p = false; |
| 351 | return new_node; |
| 352 | } |
| 353 | |
| 354 | /* Add allocno hard registers node NEW_NODE to the forest on its level |
| 355 | given by ROOTS. */ |
| 356 | static void |
| 357 | add_new_allocno_hard_regs_node_to_forest (allocno_hard_regs_node_t *roots, |
| 358 | allocno_hard_regs_node_t new_node) |
| 359 | { |
| 360 | new_node->next = *roots; |
| 361 | if (new_node->next != NULLnullptr) |
| 362 | new_node->next->prev = new_node; |
| 363 | new_node->prev = NULLnullptr; |
| 364 | *roots = new_node; |
| 365 | } |
| 366 | |
| 367 | /* Add allocno hard registers HV (or its best approximation if it is |
| 368 | not possible) to the forest on its level given by ROOTS. */ |
| 369 | static void |
| 370 | add_allocno_hard_regs_to_forest (allocno_hard_regs_node_t *roots, |
| 371 | allocno_hard_regs_t hv) |
| 372 | { |
| 373 | unsigned int i, start; |
| 374 | allocno_hard_regs_node_t node, prev, new_node; |
| 375 | HARD_REG_SET temp_set; |
| 376 | allocno_hard_regs_t hv2; |
| 377 | |
| 378 | start = hard_regs_node_vec.length (); |
| 379 | for (node = *roots; node != NULLnullptr; node = node->next) |
| 380 | { |
| 381 | if (hv->set == node->hard_regs->set) |
| 382 | return; |
| 383 | if (hard_reg_set_subset_p (hv->set, node->hard_regs->set)) |
| 384 | { |
| 385 | add_allocno_hard_regs_to_forest (&node->first, hv); |
| 386 | return; |
| 387 | } |
| 388 | if (hard_reg_set_subset_p (node->hard_regs->set, hv->set)) |
| 389 | hard_regs_node_vec.safe_push (node); |
| 390 | else if (hard_reg_set_intersect_p (hv->set, node->hard_regs->set)) |
| 391 | { |
| 392 | temp_set = hv->set & node->hard_regs->set; |
| 393 | hv2 = add_allocno_hard_regs (temp_set, hv->cost); |
| 394 | add_allocno_hard_regs_to_forest (&node->first, hv2); |
| 395 | } |
| 396 | } |
| 397 | if (hard_regs_node_vec.length () |
| 398 | > start + 1) |
| 399 | { |
| 400 | /* Create a new node which contains nodes in hard_regs_node_vec. */ |
| 401 | CLEAR_HARD_REG_SET (temp_set); |
| 402 | for (i = start; |
| 403 | i < hard_regs_node_vec.length (); |
| 404 | i++) |
| 405 | { |
| 406 | node = hard_regs_node_vec[i]; |
| 407 | temp_set |= node->hard_regs->set; |
| 408 | } |
| 409 | hv = add_allocno_hard_regs (temp_set, hv->cost); |
| 410 | new_node = create_new_allocno_hard_regs_node (hv); |
| 411 | prev = NULLnullptr; |
| 412 | for (i = start; |
| 413 | i < hard_regs_node_vec.length (); |
| 414 | i++) |
| 415 | { |
| 416 | node = hard_regs_node_vec[i]; |
| 417 | if (node->prev == NULLnullptr) |
| 418 | *roots = node->next; |
| 419 | else |
| 420 | node->prev->next = node->next; |
| 421 | if (node->next != NULLnullptr) |
| 422 | node->next->prev = node->prev; |
| 423 | if (prev == NULLnullptr) |
| 424 | new_node->first = node; |
| 425 | else |
| 426 | prev->next = node; |
| 427 | node->prev = prev; |
| 428 | node->next = NULLnullptr; |
| 429 | prev = node; |
| 430 | } |
| 431 | add_new_allocno_hard_regs_node_to_forest (roots, new_node); |
| 432 | } |
| 433 | hard_regs_node_vec.truncate (start); |
| 434 | } |
| 435 | |
| 436 | /* Add allocno hard registers nodes starting with the forest level |
| 437 | given by FIRST which contains biggest set inside SET. */ |
| 438 | static void |
| 439 | collect_allocno_hard_regs_cover (allocno_hard_regs_node_t first, |
| 440 | HARD_REG_SET set) |
| 441 | { |
| 442 | allocno_hard_regs_node_t node; |
| 443 | |
| 444 | ira_assert (first != NULL)((void)(!(first != nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 444, __FUNCTION__), 0 : 0)); |
| 445 | for (node = first; node != NULLnullptr; node = node->next) |
| 446 | if (hard_reg_set_subset_p (node->hard_regs->set, set)) |
| 447 | hard_regs_node_vec.safe_push (node); |
| 448 | else if (hard_reg_set_intersect_p (set, node->hard_regs->set)) |
| 449 | collect_allocno_hard_regs_cover (node->first, set); |
| 450 | } |
| 451 | |
| 452 | /* Set up field parent as PARENT in all allocno hard registers nodes |
| 453 | in forest given by FIRST. */ |
| 454 | static void |
| 455 | setup_allocno_hard_regs_nodes_parent (allocno_hard_regs_node_t first, |
| 456 | allocno_hard_regs_node_t parent) |
| 457 | { |
| 458 | allocno_hard_regs_node_t node; |
| 459 | |
| 460 | for (node = first; node != NULLnullptr; node = node->next) |
| 461 | { |
| 462 | node->parent = parent; |
| 463 | setup_allocno_hard_regs_nodes_parent (node->first, node); |
| 464 | } |
| 465 | } |
| 466 | |
| 467 | /* Return allocno hard registers node which is a first common ancestor |
| 468 | node of FIRST and SECOND in the forest. */ |
| 469 | static allocno_hard_regs_node_t |
| 470 | first_common_ancestor_node (allocno_hard_regs_node_t first, |
| 471 | allocno_hard_regs_node_t second) |
| 472 | { |
| 473 | allocno_hard_regs_node_t node; |
| 474 | |
| 475 | node_check_tick++; |
| 476 | for (node = first; node != NULLnullptr; node = node->parent) |
| 477 | node->check = node_check_tick; |
| 478 | for (node = second; node != NULLnullptr; node = node->parent) |
| 479 | if (node->check == node_check_tick) |
| 480 | return node; |
| 481 | return first_common_ancestor_node (second, first); |
| 482 | } |
| 483 | |
| 484 | /* Print hard reg set SET to F. */ |
| 485 | static void |
| 486 | print_hard_reg_set (FILE *f, HARD_REG_SET set, bool new_line_p) |
| 487 | { |
| 488 | int i, start, end; |
| 489 | |
| 490 | for (start = end = -1, i = 0; i < FIRST_PSEUDO_REGISTER76; i++) |
| 491 | { |
| 492 | bool reg_included = TEST_HARD_REG_BIT (set, i); |
| 493 | |
| 494 | if (reg_included) |
| 495 | { |
| 496 | if (start == -1) |
| 497 | start = i; |
| 498 | end = i; |
| 499 | } |
| 500 | if (start >= 0 && (!reg_included || i == FIRST_PSEUDO_REGISTER76 - 1)) |
| 501 | { |
| 502 | if (start == end) |
| 503 | fprintf (f, " %d", start); |
| 504 | else if (start == end + 1) |
| 505 | fprintf (f, " %d %d", start, end); |
| 506 | else |
| 507 | fprintf (f, " %d-%d", start, end); |
| 508 | start = -1; |
| 509 | } |
| 510 | } |
| 511 | if (new_line_p) |
| 512 | fprintf (f, "\n"); |
| 513 | } |
| 514 | |
| 515 | /* Dump a hard reg set SET to stderr. */ |
| 516 | DEBUG_FUNCTION__attribute__ ((__used__)) void |
| 517 | debug_hard_reg_set (HARD_REG_SET set) |
| 518 | { |
| 519 | print_hard_reg_set (stderrstderr, set, true); |
| 520 | } |
| 521 | |
| 522 | /* Print allocno hard register subforest given by ROOTS and its LEVEL |
| 523 | to F. */ |
| 524 | static void |
| 525 | print_hard_regs_subforest (FILE *f, allocno_hard_regs_node_t roots, |
| 526 | int level) |
| 527 | { |
| 528 | int i; |
| 529 | allocno_hard_regs_node_t node; |
| 530 | |
| 531 | for (node = roots; node != NULLnullptr; node = node->next) |
| 532 | { |
| 533 | fprintf (f, " "); |
| 534 | for (i = 0; i < level * 2; i++) |
| 535 | fprintf (f, " "); |
| 536 | fprintf (f, "%d:(", node->preorder_num); |
| 537 | print_hard_reg_set (f, node->hard_regs->set, false); |
| 538 | fprintf (f, ")@%" PRId64"l" "d""\n", node->hard_regs->cost); |
| 539 | print_hard_regs_subforest (f, node->first, level + 1); |
| 540 | } |
| 541 | } |
| 542 | |
| 543 | /* Print the allocno hard register forest to F. */ |
| 544 | static void |
| 545 | print_hard_regs_forest (FILE *f) |
| 546 | { |
| 547 | fprintf (f, " Hard reg set forest:\n"); |
| 548 | print_hard_regs_subforest (f, hard_regs_roots, 1); |
| 549 | } |
| 550 | |
| 551 | /* Print the allocno hard register forest to stderr. */ |
| 552 | void |
| 553 | ira_debug_hard_regs_forest (void) |
| 554 | { |
| 555 | print_hard_regs_forest (stderrstderr); |
| 556 | } |
| 557 | |
| 558 | /* Remove unused allocno hard registers nodes from forest given by its |
| 559 | *ROOTS. */ |
| 560 | static void |
| 561 | remove_unused_allocno_hard_regs_nodes (allocno_hard_regs_node_t *roots) |
| 562 | { |
| 563 | allocno_hard_regs_node_t node, prev, next, last; |
| 564 | |
| 565 | for (prev = NULLnullptr, node = *roots; node != NULLnullptr; node = next) |
| 566 | { |
| 567 | next = node->next; |
| 568 | if (node->used_p) |
| 569 | { |
| 570 | remove_unused_allocno_hard_regs_nodes (&node->first); |
| 571 | prev = node; |
| 572 | } |
| 573 | else |
| 574 | { |
| 575 | for (last = node->first; |
| 576 | last != NULLnullptr && last->next != NULLnullptr; |
| 577 | last = last->next) |
| 578 | ; |
| 579 | if (last != NULLnullptr) |
| 580 | { |
| 581 | if (prev == NULLnullptr) |
| 582 | *roots = node->first; |
| 583 | else |
| 584 | prev->next = node->first; |
| 585 | if (next != NULLnullptr) |
| 586 | next->prev = last; |
| 587 | last->next = next; |
| 588 | next = node->first; |
| 589 | } |
| 590 | else |
| 591 | { |
| 592 | if (prev == NULLnullptr) |
| 593 | *roots = next; |
| 594 | else |
| 595 | prev->next = next; |
| 596 | if (next != NULLnullptr) |
| 597 | next->prev = prev; |
| 598 | } |
| 599 | ira_free (node); |
| 600 | } |
| 601 | } |
| 602 | } |
| 603 | |
| 604 | /* Set up fields preorder_num starting with START_NUM in all allocno |
| 605 | hard registers nodes in forest given by FIRST. Return biggest set |
| 606 | PREORDER_NUM increased by 1. */ |
| 607 | static int |
| 608 | enumerate_allocno_hard_regs_nodes (allocno_hard_regs_node_t first, |
| 609 | allocno_hard_regs_node_t parent, |
| 610 | int start_num) |
| 611 | { |
| 612 | allocno_hard_regs_node_t node; |
| 613 | |
| 614 | for (node = first; node != NULLnullptr; node = node->next) |
| 615 | { |
| 616 | node->preorder_num = start_num++; |
| 617 | node->parent = parent; |
| 618 | start_num = enumerate_allocno_hard_regs_nodes (node->first, node, |
| 619 | start_num); |
| 620 | } |
| 621 | return start_num; |
| 622 | } |
| 623 | |
| 624 | /* Number of allocno hard registers nodes in the forest. */ |
| 625 | static int allocno_hard_regs_nodes_num; |
| 626 | |
| 627 | /* Table preorder number of allocno hard registers node in the forest |
| 628 | -> the allocno hard registers node. */ |
| 629 | static allocno_hard_regs_node_t *allocno_hard_regs_nodes; |
| 630 | |
| 631 | /* See below. */ |
| 632 | typedef struct allocno_hard_regs_subnode *allocno_hard_regs_subnode_t; |
| 633 | |
| 634 | /* The structure is used to describes all subnodes (not only immediate |
| 635 | ones) in the mentioned above tree for given allocno hard register |
| 636 | node. The usage of such data accelerates calculation of |
| 637 | colorability of given allocno. */ |
| 638 | struct allocno_hard_regs_subnode |
| 639 | { |
| 640 | /* The conflict size of conflicting allocnos whose hard register |
| 641 | sets are equal sets (plus supersets if given node is given |
| 642 | allocno hard registers node) of one in the given node. */ |
| 643 | int left_conflict_size; |
| 644 | /* The summary conflict size of conflicting allocnos whose hard |
| 645 | register sets are strict subsets of one in the given node. |
| 646 | Overall conflict size is |
| 647 | left_conflict_subnodes_size |
| 648 | + MIN (max_node_impact - left_conflict_subnodes_size, |
| 649 | left_conflict_size) |
| 650 | */ |
| 651 | short left_conflict_subnodes_size; |
| 652 | short max_node_impact; |
| 653 | }; |
| 654 | |
| 655 | /* Container for hard regs subnodes of all allocnos. */ |
| 656 | static allocno_hard_regs_subnode_t allocno_hard_regs_subnodes; |
| 657 | |
| 658 | /* Table (preorder number of allocno hard registers node in the |
| 659 | forest, preorder number of allocno hard registers subnode) -> index |
| 660 | of the subnode relative to the node. -1 if it is not a |
| 661 | subnode. */ |
| 662 | static int *allocno_hard_regs_subnode_index; |
| 663 | |
| 664 | /* Setup arrays ALLOCNO_HARD_REGS_NODES and |
| 665 | ALLOCNO_HARD_REGS_SUBNODE_INDEX. */ |
| 666 | static void |
| 667 | setup_allocno_hard_regs_subnode_index (allocno_hard_regs_node_t first) |
| 668 | { |
| 669 | allocno_hard_regs_node_t node, parent; |
| 670 | int index; |
| 671 | |
| 672 | for (node = first; node != NULLnullptr; node = node->next) |
| 673 | { |
| 674 | allocno_hard_regs_nodes[node->preorder_num] = node; |
| 675 | for (parent = node; parent != NULLnullptr; parent = parent->parent) |
| 676 | { |
| 677 | index = parent->preorder_num * allocno_hard_regs_nodes_num; |
| 678 | allocno_hard_regs_subnode_index[index + node->preorder_num] |
| 679 | = node->preorder_num - parent->preorder_num; |
| 680 | } |
| 681 | setup_allocno_hard_regs_subnode_index (node->first); |
| 682 | } |
| 683 | } |
| 684 | |
| 685 | /* Count all allocno hard registers nodes in tree ROOT. */ |
| 686 | static int |
| 687 | get_allocno_hard_regs_subnodes_num (allocno_hard_regs_node_t root) |
| 688 | { |
| 689 | int len = 1; |
| 690 | |
| 691 | for (root = root->first; root != NULLnullptr; root = root->next) |
| 692 | len += get_allocno_hard_regs_subnodes_num (root); |
| 693 | return len; |
| 694 | } |
| 695 | |
| 696 | /* Build the forest of allocno hard registers nodes and assign each |
| 697 | allocno a node from the forest. */ |
| 698 | static void |
| 699 | form_allocno_hard_regs_nodes_forest (void) |
| 700 | { |
| 701 | unsigned int i, j, size, len; |
| 702 | int start; |
| 703 | ira_allocno_t a; |
| 704 | allocno_hard_regs_t hv; |
| 705 | bitmap_iterator bi; |
| 706 | HARD_REG_SET temp; |
| 707 | allocno_hard_regs_node_t node, allocno_hard_regs_node; |
| 708 | allocno_color_data_t allocno_data; |
| 709 | |
| 710 | node_check_tick = 0; |
| 711 | init_allocno_hard_regs (); |
| 712 | hard_regs_roots = NULLnullptr; |
| 713 | hard_regs_node_vec.create (100); |
| 714 | for (i = 0; i < FIRST_PSEUDO_REGISTER76; i++) |
| 715 | if (! TEST_HARD_REG_BIT (ira_no_alloc_regs(this_target_ira->x_ira_no_alloc_regs), i)) |
| 716 | { |
| 717 | CLEAR_HARD_REG_SET (temp); |
| 718 | SET_HARD_REG_BIT (temp, i); |
| 719 | hv = add_allocno_hard_regs (temp, 0); |
| 720 | node = create_new_allocno_hard_regs_node (hv); |
| 721 | add_new_allocno_hard_regs_node_to_forest (&hard_regs_roots, node); |
| 722 | } |
| 723 | start = allocno_hard_regs_vec.length (); |
| 724 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 725 | { |
| 726 | a = ira_allocnos[i]; |
| 727 | allocno_data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 728 | |
| 729 | if (hard_reg_set_empty_p (allocno_data->profitable_hard_regs)) |
| 730 | continue; |
| 731 | hv = (add_allocno_hard_regs |
| 732 | (allocno_data->profitable_hard_regs, |
| 733 | ALLOCNO_MEMORY_COST (a)((a)->memory_cost) - ALLOCNO_CLASS_COST (a)((a)->class_cost))); |
| 734 | } |
| 735 | temp = ~ira_no_alloc_regs(this_target_ira->x_ira_no_alloc_regs); |
| 736 | add_allocno_hard_regs (temp, 0); |
| 737 | qsort (allocno_hard_regs_vec.address () + start,gcc_qsort (allocno_hard_regs_vec.address () + start, allocno_hard_regs_vec .length () - start, sizeof (allocno_hard_regs_t), allocno_hard_regs_compare ) |
| 738 | allocno_hard_regs_vec.length () - start,gcc_qsort (allocno_hard_regs_vec.address () + start, allocno_hard_regs_vec .length () - start, sizeof (allocno_hard_regs_t), allocno_hard_regs_compare ) |
| 739 | sizeof (allocno_hard_regs_t), allocno_hard_regs_compare)gcc_qsort (allocno_hard_regs_vec.address () + start, allocno_hard_regs_vec .length () - start, sizeof (allocno_hard_regs_t), allocno_hard_regs_compare ); |
| 740 | for (i = start; |
| 741 | allocno_hard_regs_vec.iterate (i, &hv); |
| 742 | i++) |
| 743 | { |
| 744 | add_allocno_hard_regs_to_forest (&hard_regs_roots, hv); |
| 745 | ira_assert (hard_regs_node_vec.length () == 0)((void)(!(hard_regs_node_vec.length () == 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 745, __FUNCTION__), 0 : 0)); |
| 746 | } |
| 747 | /* We need to set up parent fields for right work of |
| 748 | first_common_ancestor_node. */ |
| 749 | setup_allocno_hard_regs_nodes_parent (hard_regs_roots, NULLnullptr); |
| 750 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 751 | { |
| 752 | a = ira_allocnos[i]; |
| 753 | allocno_data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 754 | if (hard_reg_set_empty_p (allocno_data->profitable_hard_regs)) |
| 755 | continue; |
| 756 | hard_regs_node_vec.truncate (0); |
| 757 | collect_allocno_hard_regs_cover (hard_regs_roots, |
| 758 | allocno_data->profitable_hard_regs); |
| 759 | allocno_hard_regs_node = NULLnullptr; |
| 760 | for (j = 0; hard_regs_node_vec.iterate (j, &node); j++) |
| 761 | allocno_hard_regs_node |
| 762 | = (j == 0 |
| 763 | ? node |
| 764 | : first_common_ancestor_node (node, allocno_hard_regs_node)); |
| 765 | /* That is a temporary storage. */ |
| 766 | allocno_hard_regs_node->used_p = true; |
| 767 | allocno_data->hard_regs_node = allocno_hard_regs_node; |
| 768 | } |
| 769 | ira_assert (hard_regs_roots->next == NULL)((void)(!(hard_regs_roots->next == nullptr) ? fancy_abort ( "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 769, __FUNCTION__), 0 : 0)); |
| 770 | hard_regs_roots->used_p = true; |
| 771 | remove_unused_allocno_hard_regs_nodes (&hard_regs_roots); |
| 772 | allocno_hard_regs_nodes_num |
| 773 | = enumerate_allocno_hard_regs_nodes (hard_regs_roots, NULLnullptr, 0); |
| 774 | allocno_hard_regs_nodes |
| 775 | = ((allocno_hard_regs_node_t *) |
| 776 | ira_allocate (allocno_hard_regs_nodes_num |
| 777 | * sizeof (allocno_hard_regs_node_t))); |
| 778 | size = allocno_hard_regs_nodes_num * allocno_hard_regs_nodes_num; |
| 779 | allocno_hard_regs_subnode_index |
| 780 | = (int *) ira_allocate (size * sizeof (int)); |
| 781 | for (i = 0; i < size; i++) |
| 782 | allocno_hard_regs_subnode_index[i] = -1; |
| 783 | setup_allocno_hard_regs_subnode_index (hard_regs_roots); |
| 784 | start = 0; |
| 785 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 786 | { |
| 787 | a = ira_allocnos[i]; |
| 788 | allocno_data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 789 | if (hard_reg_set_empty_p (allocno_data->profitable_hard_regs)) |
| 790 | continue; |
| 791 | len = get_allocno_hard_regs_subnodes_num (allocno_data->hard_regs_node); |
| 792 | allocno_data->hard_regs_subnodes_start = start; |
| 793 | allocno_data->hard_regs_subnodes_num = len; |
| 794 | start += len; |
| 795 | } |
| 796 | allocno_hard_regs_subnodes |
| 797 | = ((allocno_hard_regs_subnode_t) |
| 798 | ira_allocate (sizeof (struct allocno_hard_regs_subnode) * start)); |
| 799 | hard_regs_node_vec.release (); |
| 800 | } |
| 801 | |
| 802 | /* Free tree of allocno hard registers nodes given by its ROOT. */ |
| 803 | static void |
| 804 | finish_allocno_hard_regs_nodes_tree (allocno_hard_regs_node_t root) |
| 805 | { |
| 806 | allocno_hard_regs_node_t child, next; |
| 807 | |
| 808 | for (child = root->first; child != NULLnullptr; child = next) |
| 809 | { |
| 810 | next = child->next; |
| 811 | finish_allocno_hard_regs_nodes_tree (child); |
| 812 | } |
| 813 | ira_free (root); |
| 814 | } |
| 815 | |
| 816 | /* Finish work with the forest of allocno hard registers nodes. */ |
| 817 | static void |
| 818 | finish_allocno_hard_regs_nodes_forest (void) |
| 819 | { |
| 820 | allocno_hard_regs_node_t node, next; |
| 821 | |
| 822 | ira_free (allocno_hard_regs_subnodes); |
| 823 | for (node = hard_regs_roots; node != NULLnullptr; node = next) |
| 824 | { |
| 825 | next = node->next; |
| 826 | finish_allocno_hard_regs_nodes_tree (node); |
| 827 | } |
| 828 | ira_free (allocno_hard_regs_nodes); |
| 829 | ira_free (allocno_hard_regs_subnode_index); |
| 830 | finish_allocno_hard_regs (); |
| 831 | } |
| 832 | |
| 833 | /* Set up left conflict sizes and left conflict subnodes sizes of hard |
| 834 | registers subnodes of allocno A. Return TRUE if allocno A is |
| 835 | trivially colorable. */ |
| 836 | static bool |
| 837 | setup_left_conflict_sizes_p (ira_allocno_t a) |
| 838 | { |
| 839 | int i, k, nobj, start; |
| 840 | int conflict_size, left_conflict_subnodes_size, node_preorder_num; |
| 841 | allocno_color_data_t data; |
| 842 | HARD_REG_SET profitable_hard_regs; |
| 843 | allocno_hard_regs_subnode_t subnodes; |
| 844 | allocno_hard_regs_node_t node; |
| 845 | HARD_REG_SET node_set; |
| 846 | |
| 847 | nobj = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 848 | data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 849 | subnodes = allocno_hard_regs_subnodes + data->hard_regs_subnodes_start; |
| 850 | profitable_hard_regs = data->profitable_hard_regs; |
| 851 | node = data->hard_regs_node; |
| 852 | node_preorder_num = node->preorder_num; |
| 853 | node_set = node->hard_regs->set; |
| 854 | node_check_tick++; |
| 855 | for (k = 0; k < nobj; k++) |
| 856 | { |
| 857 | ira_object_t obj = ALLOCNO_OBJECT (a, k)((a)->objects[k]); |
| 858 | ira_object_t conflict_obj; |
| 859 | ira_object_conflict_iterator oci; |
| 860 | |
| 861 | FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)for (ira_object_conflict_iter_init (&(oci), (obj)); ira_object_conflict_iter_cond (&(oci), &(conflict_obj));) |
| 862 | { |
| 863 | int size; |
| 864 | ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj)((conflict_obj)->allocno); |
| 865 | allocno_hard_regs_node_t conflict_node, temp_node; |
| 866 | HARD_REG_SET conflict_node_set; |
| 867 | allocno_color_data_t conflict_data; |
| 868 | |
| 869 | conflict_data = ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data)); |
| 870 | if (! ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data))->in_graph_p |
| 871 | || ! hard_reg_set_intersect_p (profitable_hard_regs, |
| 872 | conflict_data |
| 873 | ->profitable_hard_regs)) |
| 874 | continue; |
| 875 | conflict_node = conflict_data->hard_regs_node; |
| 876 | conflict_node_set = conflict_node->hard_regs->set; |
| 877 | if (hard_reg_set_subset_p (node_set, conflict_node_set)) |
| 878 | temp_node = node; |
| 879 | else |
| 880 | { |
| 881 | ira_assert (hard_reg_set_subset_p (conflict_node_set, node_set))((void)(!(hard_reg_set_subset_p (conflict_node_set, node_set) ) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 881, __FUNCTION__), 0 : 0)); |
| 882 | temp_node = conflict_node; |
| 883 | } |
| 884 | if (temp_node->check != node_check_tick) |
| 885 | { |
| 886 | temp_node->check = node_check_tick; |
| 887 | temp_node->conflict_size = 0; |
| 888 | } |
| 889 | size = (ira_reg_class_max_nregs(this_target_ira->x_ira_reg_class_max_nregs) |
| 890 | [ALLOCNO_CLASS (conflict_a)((conflict_a)->aclass)][ALLOCNO_MODE (conflict_a)((conflict_a)->mode)]); |
| 891 | if (ALLOCNO_NUM_OBJECTS (conflict_a)((conflict_a)->num_objects) > 1) |
| 892 | /* We will deal with the subwords individually. */ |
| 893 | size = 1; |
| 894 | temp_node->conflict_size += size; |
| 895 | } |
| 896 | } |
| 897 | for (i = 0; i < data->hard_regs_subnodes_num; i++) |
| 898 | { |
| 899 | allocno_hard_regs_node_t temp_node; |
| 900 | |
| 901 | temp_node = allocno_hard_regs_nodes[i + node_preorder_num]; |
| 902 | ira_assert (temp_node->preorder_num == i + node_preorder_num)((void)(!(temp_node->preorder_num == i + node_preorder_num ) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 902, __FUNCTION__), 0 : 0)); |
| 903 | subnodes[i].left_conflict_size = (temp_node->check != node_check_tick |
| 904 | ? 0 : temp_node->conflict_size); |
| 905 | if (hard_reg_set_subset_p (temp_node->hard_regs->set, |
| 906 | profitable_hard_regs)) |
| 907 | subnodes[i].max_node_impact = temp_node->hard_regs_num; |
| 908 | else |
| 909 | { |
| 910 | HARD_REG_SET temp_set; |
| 911 | int j, n, hard_regno; |
| 912 | enum reg_class aclass; |
| 913 | |
| 914 | temp_set = temp_node->hard_regs->set & profitable_hard_regs; |
| 915 | aclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 916 | for (n = 0, j = ira_class_hard_regs_num(this_target_ira->x_ira_class_hard_regs_num)[aclass] - 1; j >= 0; j--) |
| 917 | { |
| 918 | hard_regno = ira_class_hard_regs(this_target_ira->x_ira_class_hard_regs)[aclass][j]; |
| 919 | if (TEST_HARD_REG_BIT (temp_set, hard_regno)) |
| 920 | n++; |
| 921 | } |
| 922 | subnodes[i].max_node_impact = n; |
| 923 | } |
| 924 | subnodes[i].left_conflict_subnodes_size = 0; |
| 925 | } |
| 926 | start = node_preorder_num * allocno_hard_regs_nodes_num; |
| 927 | for (i = data->hard_regs_subnodes_num - 1; i > 0; i--) |
| 928 | { |
| 929 | int size, parent_i; |
| 930 | allocno_hard_regs_node_t parent; |
| 931 | |
| 932 | size = (subnodes[i].left_conflict_subnodes_size |
| 933 | + MIN (subnodes[i].max_node_impact((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size )) |
| 934 | - subnodes[i].left_conflict_subnodes_size,((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size )) |
| 935 | subnodes[i].left_conflict_size)((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size ))); |
| 936 | parent = allocno_hard_regs_nodes[i + node_preorder_num]->parent; |
| 937 | gcc_checking_assert(parent)((void)(!(parent) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 937, __FUNCTION__), 0 : 0)); |
| 938 | parent_i |
| 939 | = allocno_hard_regs_subnode_index[start + parent->preorder_num]; |
| 940 | gcc_checking_assert(parent_i >= 0)((void)(!(parent_i >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 940, __FUNCTION__), 0 : 0)); |
| 941 | subnodes[parent_i].left_conflict_subnodes_size += size; |
| 942 | } |
| 943 | left_conflict_subnodes_size = subnodes[0].left_conflict_subnodes_size; |
| 944 | conflict_size |
| 945 | = (left_conflict_subnodes_size |
| 946 | + MIN (subnodes[0].max_node_impact - left_conflict_subnodes_size,((subnodes[0].max_node_impact - left_conflict_subnodes_size) < (subnodes[0].left_conflict_size) ? (subnodes[0].max_node_impact - left_conflict_subnodes_size) : (subnodes[0].left_conflict_size )) |
| 947 | subnodes[0].left_conflict_size)((subnodes[0].max_node_impact - left_conflict_subnodes_size) < (subnodes[0].left_conflict_size) ? (subnodes[0].max_node_impact - left_conflict_subnodes_size) : (subnodes[0].left_conflict_size ))); |
| 948 | conflict_size += ira_reg_class_max_nregs(this_target_ira->x_ira_reg_class_max_nregs)[ALLOCNO_CLASS (a)((a)->aclass)][ALLOCNO_MODE (a)((a)->mode)]; |
| 949 | data->colorable_p = conflict_size <= data->available_regs_num; |
| 950 | return data->colorable_p; |
| 951 | } |
| 952 | |
| 953 | /* Update left conflict sizes of hard registers subnodes of allocno A |
| 954 | after removing allocno REMOVED_A with SIZE from the conflict graph. |
| 955 | Return TRUE if A is trivially colorable. */ |
| 956 | static bool |
| 957 | update_left_conflict_sizes_p (ira_allocno_t a, |
| 958 | ira_allocno_t removed_a, int size) |
| 959 | { |
| 960 | int i, conflict_size, before_conflict_size, diff, start; |
| 961 | int node_preorder_num, parent_i; |
| 962 | allocno_hard_regs_node_t node, removed_node, parent; |
| 963 | allocno_hard_regs_subnode_t subnodes; |
| 964 | allocno_color_data_t data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 965 | |
| 966 | ira_assert (! data->colorable_p)((void)(!(! data->colorable_p) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 966, __FUNCTION__), 0 : 0)); |
| 967 | node = data->hard_regs_node; |
| 968 | node_preorder_num = node->preorder_num; |
| 969 | removed_node = ALLOCNO_COLOR_DATA (removed_a)((allocno_color_data_t) ((removed_a)->add_data))->hard_regs_node; |
| 970 | ira_assert (hard_reg_set_subset_p (removed_node->hard_regs->set,((void)(!(hard_reg_set_subset_p (removed_node->hard_regs-> set, node->hard_regs->set) || hard_reg_set_subset_p (node ->hard_regs->set, removed_node->hard_regs->set)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 973, __FUNCTION__), 0 : 0)) |
| 971 | node->hard_regs->set)((void)(!(hard_reg_set_subset_p (removed_node->hard_regs-> set, node->hard_regs->set) || hard_reg_set_subset_p (node ->hard_regs->set, removed_node->hard_regs->set)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 973, __FUNCTION__), 0 : 0)) |
| 972 | || hard_reg_set_subset_p (node->hard_regs->set,((void)(!(hard_reg_set_subset_p (removed_node->hard_regs-> set, node->hard_regs->set) || hard_reg_set_subset_p (node ->hard_regs->set, removed_node->hard_regs->set)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 973, __FUNCTION__), 0 : 0)) |
| 973 | removed_node->hard_regs->set))((void)(!(hard_reg_set_subset_p (removed_node->hard_regs-> set, node->hard_regs->set) || hard_reg_set_subset_p (node ->hard_regs->set, removed_node->hard_regs->set)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 973, __FUNCTION__), 0 : 0)); |
| 974 | start = node_preorder_num * allocno_hard_regs_nodes_num; |
| 975 | i = allocno_hard_regs_subnode_index[start + removed_node->preorder_num]; |
| 976 | if (i < 0) |
| 977 | i = 0; |
| 978 | subnodes = allocno_hard_regs_subnodes + data->hard_regs_subnodes_start; |
| 979 | before_conflict_size |
| 980 | = (subnodes[i].left_conflict_subnodes_size |
| 981 | + MIN (subnodes[i].max_node_impact((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size )) |
| 982 | - subnodes[i].left_conflict_subnodes_size,((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size )) |
| 983 | subnodes[i].left_conflict_size)((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size ))); |
| 984 | subnodes[i].left_conflict_size -= size; |
| 985 | for (;;) |
| 986 | { |
| 987 | conflict_size |
| 988 | = (subnodes[i].left_conflict_subnodes_size |
| 989 | + MIN (subnodes[i].max_node_impact((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size )) |
| 990 | - subnodes[i].left_conflict_subnodes_size,((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size )) |
| 991 | subnodes[i].left_conflict_size)((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size ))); |
| 992 | if ((diff = before_conflict_size - conflict_size) == 0) |
| 993 | break; |
| 994 | ira_assert (conflict_size < before_conflict_size)((void)(!(conflict_size < before_conflict_size) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 994, __FUNCTION__), 0 : 0)); |
| 995 | parent = allocno_hard_regs_nodes[i + node_preorder_num]->parent; |
| 996 | if (parent == NULLnullptr) |
| 997 | break; |
| 998 | parent_i |
| 999 | = allocno_hard_regs_subnode_index[start + parent->preorder_num]; |
| 1000 | if (parent_i < 0) |
| 1001 | break; |
| 1002 | i = parent_i; |
| 1003 | before_conflict_size |
| 1004 | = (subnodes[i].left_conflict_subnodes_size |
| 1005 | + MIN (subnodes[i].max_node_impact((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size )) |
| 1006 | - subnodes[i].left_conflict_subnodes_size,((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size )) |
| 1007 | subnodes[i].left_conflict_size)((subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size ) < (subnodes[i].left_conflict_size) ? (subnodes[i].max_node_impact - subnodes[i].left_conflict_subnodes_size) : (subnodes[i].left_conflict_size ))); |
| 1008 | subnodes[i].left_conflict_subnodes_size -= diff; |
| 1009 | } |
| 1010 | if (i != 0 |
| 1011 | || (conflict_size |
| 1012 | + ira_reg_class_max_nregs(this_target_ira->x_ira_reg_class_max_nregs)[ALLOCNO_CLASS (a)((a)->aclass)][ALLOCNO_MODE (a)((a)->mode)] |
| 1013 | > data->available_regs_num)) |
| 1014 | return false; |
| 1015 | data->colorable_p = true; |
| 1016 | return true; |
| 1017 | } |
| 1018 | |
| 1019 | /* Return true if allocno A has empty profitable hard regs. */ |
| 1020 | static bool |
| 1021 | empty_profitable_hard_regs (ira_allocno_t a) |
| 1022 | { |
| 1023 | allocno_color_data_t data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 1024 | |
| 1025 | return hard_reg_set_empty_p (data->profitable_hard_regs); |
| 1026 | } |
| 1027 | |
| 1028 | /* Set up profitable hard registers for each allocno being |
| 1029 | colored. */ |
| 1030 | static void |
| 1031 | setup_profitable_hard_regs (void) |
| 1032 | { |
| 1033 | unsigned int i; |
| 1034 | int j, k, nobj, hard_regno, nregs, class_size; |
| 1035 | ira_allocno_t a; |
| 1036 | bitmap_iterator bi; |
| 1037 | enum reg_class aclass; |
| 1038 | machine_mode mode; |
| 1039 | allocno_color_data_t data; |
| 1040 | |
| 1041 | /* Initial set up from allocno classes and explicitly conflicting |
| 1042 | hard regs. */ |
| 1043 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 1044 | { |
| 1045 | a = ira_allocnos[i]; |
| 1046 | if ((aclass = ALLOCNO_CLASS (a)((a)->aclass)) == NO_REGS) |
| 1047 | continue; |
| 1048 | data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 1049 | if (ALLOCNO_UPDATED_HARD_REG_COSTS (a)((a)->updated_hard_reg_costs) == NULLnullptr |
| 1050 | && ALLOCNO_CLASS_COST (a)((a)->class_cost) > ALLOCNO_MEMORY_COST (a)((a)->memory_cost) |
| 1051 | /* Do not empty profitable regs for static chain pointer |
| 1052 | pseudo when non-local goto is used. */ |
| 1053 | && ! non_spilled_static_chain_regno_p (ALLOCNO_REGNO (a)((a)->regno))) |
| 1054 | CLEAR_HARD_REG_SET (data->profitable_hard_regs); |
| 1055 | else |
| 1056 | { |
| 1057 | mode = ALLOCNO_MODE (a)((a)->mode); |
| 1058 | data->profitable_hard_regs |
| 1059 | = ira_useful_class_mode_regs(this_target_ira_int->x_ira_useful_class_mode_regs)[aclass][mode]; |
| 1060 | nobj = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 1061 | for (k = 0; k < nobj; k++) |
| 1062 | { |
| 1063 | ira_object_t obj = ALLOCNO_OBJECT (a, k)((a)->objects[k]); |
| 1064 | |
| 1065 | data->profitable_hard_regs |
| 1066 | &= ~OBJECT_TOTAL_CONFLICT_HARD_REGS (obj)((obj)->total_conflict_hard_regs); |
| 1067 | } |
| 1068 | } |
| 1069 | } |
| 1070 | /* Exclude hard regs already assigned for conflicting objects. */ |
| 1071 | EXECUTE_IF_SET_IN_BITMAP (consideration_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (consideration_allocno_bitmap ), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 1072 | { |
| 1073 | a = ira_allocnos[i]; |
| 1074 | if ((aclass = ALLOCNO_CLASS (a)((a)->aclass)) == NO_REGS |
| 1075 | || ! ALLOCNO_ASSIGNED_P (a)((a)->assigned_p) |
| 1076 | || (hard_regno = ALLOCNO_HARD_REGNO (a)((a)->hard_regno)) < 0) |
| 1077 | continue; |
| 1078 | mode = ALLOCNO_MODE (a)((a)->mode); |
| 1079 | nregs = hard_regno_nregs (hard_regno, mode); |
| 1080 | nobj = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 1081 | for (k = 0; k < nobj; k++) |
| 1082 | { |
| 1083 | ira_object_t obj = ALLOCNO_OBJECT (a, k)((a)->objects[k]); |
| 1084 | ira_object_t conflict_obj; |
| 1085 | ira_object_conflict_iterator oci; |
| 1086 | |
| 1087 | FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)for (ira_object_conflict_iter_init (&(oci), (obj)); ira_object_conflict_iter_cond (&(oci), &(conflict_obj));) |
| 1088 | { |
| 1089 | ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj)((conflict_obj)->allocno); |
| 1090 | |
| 1091 | /* We can process the conflict allocno repeatedly with |
| 1092 | the same result. */ |
| 1093 | if (nregs == nobj && nregs > 1) |
| 1094 | { |
| 1095 | int num = OBJECT_SUBWORD (conflict_obj)((conflict_obj)->subword); |
| 1096 | |
| 1097 | if (REG_WORDS_BIG_ENDIAN0) |
| 1098 | CLEAR_HARD_REG_BIT |
| 1099 | (ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data))->profitable_hard_regs, |
| 1100 | hard_regno + nobj - num - 1); |
| 1101 | else |
| 1102 | CLEAR_HARD_REG_BIT |
| 1103 | (ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data))->profitable_hard_regs, |
| 1104 | hard_regno + num); |
| 1105 | } |
| 1106 | else |
| 1107 | ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data))->profitable_hard_regs |
| 1108 | &= ~ira_reg_mode_hard_regset(this_target_ira_int->x_ira_reg_mode_hard_regset)[hard_regno][mode]; |
| 1109 | } |
| 1110 | } |
| 1111 | } |
| 1112 | /* Exclude too costly hard regs. */ |
| 1113 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 1114 | { |
| 1115 | int min_cost = INT_MAX2147483647; |
| 1116 | int *costs; |
| 1117 | |
| 1118 | a = ira_allocnos[i]; |
| 1119 | if ((aclass = ALLOCNO_CLASS (a)((a)->aclass)) == NO_REGS |
| 1120 | || empty_profitable_hard_regs (a)) |
| 1121 | continue; |
| 1122 | data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 1123 | if ((costs = ALLOCNO_UPDATED_HARD_REG_COSTS (a)((a)->updated_hard_reg_costs)) != NULLnullptr |
| 1124 | || (costs = ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs)) != NULLnullptr) |
| 1125 | { |
| 1126 | class_size = ira_class_hard_regs_num(this_target_ira->x_ira_class_hard_regs_num)[aclass]; |
| 1127 | for (j = 0; j < class_size; j++) |
| 1128 | { |
| 1129 | hard_regno = ira_class_hard_regs(this_target_ira->x_ira_class_hard_regs)[aclass][j]; |
| 1130 | if (! TEST_HARD_REG_BIT (data->profitable_hard_regs, |
| 1131 | hard_regno)) |
| 1132 | continue; |
| 1133 | if (ALLOCNO_UPDATED_MEMORY_COST (a)((a)->updated_memory_cost) < costs[j] |
| 1134 | /* Do not remove HARD_REGNO for static chain pointer |
| 1135 | pseudo when non-local goto is used. */ |
| 1136 | && ! non_spilled_static_chain_regno_p (ALLOCNO_REGNO (a)((a)->regno))) |
| 1137 | CLEAR_HARD_REG_BIT (data->profitable_hard_regs, |
| 1138 | hard_regno); |
| 1139 | else if (min_cost > costs[j]) |
| 1140 | min_cost = costs[j]; |
| 1141 | } |
| 1142 | } |
| 1143 | else if (ALLOCNO_UPDATED_MEMORY_COST (a)((a)->updated_memory_cost) |
| 1144 | < ALLOCNO_UPDATED_CLASS_COST (a)((a)->updated_class_cost) |
| 1145 | /* Do not empty profitable regs for static chain |
| 1146 | pointer pseudo when non-local goto is used. */ |
| 1147 | && ! non_spilled_static_chain_regno_p (ALLOCNO_REGNO (a)((a)->regno))) |
| 1148 | CLEAR_HARD_REG_SET (data->profitable_hard_regs); |
| 1149 | if (ALLOCNO_UPDATED_CLASS_COST (a)((a)->updated_class_cost) > min_cost) |
| 1150 | ALLOCNO_UPDATED_CLASS_COST (a)((a)->updated_class_cost) = min_cost; |
| 1151 | } |
| 1152 | } |
| 1153 | |
| 1154 | |
| 1155 | |
| 1156 | /* This page contains functions used to choose hard registers for |
| 1157 | allocnos. */ |
| 1158 | |
| 1159 | /* Pool for update cost records. */ |
| 1160 | static object_allocator<update_cost_record> update_cost_record_pool |
| 1161 | ("update cost records"); |
| 1162 | |
| 1163 | /* Return new update cost record with given params. */ |
| 1164 | static struct update_cost_record * |
| 1165 | get_update_cost_record (int hard_regno, int divisor, |
| 1166 | struct update_cost_record *next) |
| 1167 | { |
| 1168 | struct update_cost_record *record; |
| 1169 | |
| 1170 | record = update_cost_record_pool.allocate (); |
| 1171 | record->hard_regno = hard_regno; |
| 1172 | record->divisor = divisor; |
| 1173 | record->next = next; |
| 1174 | return record; |
| 1175 | } |
| 1176 | |
| 1177 | /* Free memory for all records in LIST. */ |
| 1178 | static void |
| 1179 | free_update_cost_record_list (struct update_cost_record *list) |
| 1180 | { |
| 1181 | struct update_cost_record *next; |
| 1182 | |
| 1183 | while (list != NULLnullptr) |
| 1184 | { |
| 1185 | next = list->next; |
| 1186 | update_cost_record_pool.remove (list); |
| 1187 | list = next; |
| 1188 | } |
| 1189 | } |
| 1190 | |
| 1191 | /* Free memory allocated for all update cost records. */ |
| 1192 | static void |
| 1193 | finish_update_cost_records (void) |
| 1194 | { |
| 1195 | update_cost_record_pool.release (); |
| 1196 | } |
| 1197 | |
| 1198 | /* Array whose element value is TRUE if the corresponding hard |
| 1199 | register was already allocated for an allocno. */ |
| 1200 | static bool allocated_hardreg_p[FIRST_PSEUDO_REGISTER76]; |
| 1201 | |
| 1202 | /* Describes one element in a queue of allocnos whose costs need to be |
| 1203 | updated. Each allocno in the queue is known to have an allocno |
| 1204 | class. */ |
| 1205 | struct update_cost_queue_elem |
| 1206 | { |
| 1207 | /* This element is in the queue iff CHECK == update_cost_check. */ |
| 1208 | int check; |
| 1209 | |
| 1210 | /* COST_HOP_DIVISOR**N, where N is the length of the shortest path |
| 1211 | connecting this allocno to the one being allocated. */ |
| 1212 | int divisor; |
| 1213 | |
| 1214 | /* Allocno from which we started chaining costs of connected |
| 1215 | allocnos. */ |
| 1216 | ira_allocno_t start; |
| 1217 | |
| 1218 | /* Allocno from which we are chaining costs of connected allocnos. |
| 1219 | It is used not go back in graph of allocnos connected by |
| 1220 | copies. */ |
| 1221 | ira_allocno_t from; |
| 1222 | |
| 1223 | /* The next allocno in the queue, or null if this is the last element. */ |
| 1224 | ira_allocno_t next; |
| 1225 | }; |
| 1226 | |
| 1227 | /* The first element in a queue of allocnos whose copy costs need to be |
| 1228 | updated. Null if the queue is empty. */ |
| 1229 | static ira_allocno_t update_cost_queue; |
| 1230 | |
| 1231 | /* The last element in the queue described by update_cost_queue. |
| 1232 | Not valid if update_cost_queue is null. */ |
| 1233 | static struct update_cost_queue_elem *update_cost_queue_tail; |
| 1234 | |
| 1235 | /* A pool of elements in the queue described by update_cost_queue. |
| 1236 | Elements are indexed by ALLOCNO_NUM. */ |
| 1237 | static struct update_cost_queue_elem *update_cost_queue_elems; |
| 1238 | |
| 1239 | /* The current value of update_costs_from_copies call count. */ |
| 1240 | static int update_cost_check; |
| 1241 | |
| 1242 | /* Allocate and initialize data necessary for function |
| 1243 | update_costs_from_copies. */ |
| 1244 | static void |
| 1245 | initiate_cost_update (void) |
| 1246 | { |
| 1247 | size_t size; |
| 1248 | |
| 1249 | size = ira_allocnos_num * sizeof (struct update_cost_queue_elem); |
| 1250 | update_cost_queue_elems |
| 1251 | = (struct update_cost_queue_elem *) ira_allocate (size); |
| 1252 | memset (update_cost_queue_elems, 0, size); |
| 1253 | update_cost_check = 0; |
| 1254 | } |
| 1255 | |
| 1256 | /* Deallocate data used by function update_costs_from_copies. */ |
| 1257 | static void |
| 1258 | finish_cost_update (void) |
| 1259 | { |
| 1260 | ira_free (update_cost_queue_elems); |
| 1261 | finish_update_cost_records (); |
| 1262 | } |
| 1263 | |
| 1264 | /* When we traverse allocnos to update hard register costs, the cost |
| 1265 | divisor will be multiplied by the following macro value for each |
| 1266 | hop from given allocno to directly connected allocnos. */ |
| 1267 | #define COST_HOP_DIVISOR4 4 |
| 1268 | |
| 1269 | /* Start a new cost-updating pass. */ |
| 1270 | static void |
| 1271 | start_update_cost (void) |
| 1272 | { |
| 1273 | update_cost_check++; |
| 1274 | update_cost_queue = NULLnullptr; |
| 1275 | } |
| 1276 | |
| 1277 | /* Add (ALLOCNO, START, FROM, DIVISOR) to the end of update_cost_queue, unless |
| 1278 | ALLOCNO is already in the queue, or has NO_REGS class. */ |
| 1279 | static inline void |
| 1280 | queue_update_cost (ira_allocno_t allocno, ira_allocno_t start, |
| 1281 | ira_allocno_t from, int divisor) |
| 1282 | { |
| 1283 | struct update_cost_queue_elem *elem; |
| 1284 | |
| 1285 | elem = &update_cost_queue_elems[ALLOCNO_NUM (allocno)((allocno)->num)]; |
| 1286 | if (elem->check != update_cost_check |
| 1287 | && ALLOCNO_CLASS (allocno)((allocno)->aclass) != NO_REGS) |
| 1288 | { |
| 1289 | elem->check = update_cost_check; |
| 1290 | elem->start = start; |
| 1291 | elem->from = from; |
| 1292 | elem->divisor = divisor; |
| 1293 | elem->next = NULLnullptr; |
| 1294 | if (update_cost_queue == NULLnullptr) |
| 1295 | update_cost_queue = allocno; |
| 1296 | else |
| 1297 | update_cost_queue_tail->next = allocno; |
| 1298 | update_cost_queue_tail = elem; |
| 1299 | } |
| 1300 | } |
| 1301 | |
| 1302 | /* Try to remove the first element from update_cost_queue. Return |
| 1303 | false if the queue was empty, otherwise make (*ALLOCNO, *START, |
| 1304 | *FROM, *DIVISOR) describe the removed element. */ |
| 1305 | static inline bool |
| 1306 | get_next_update_cost (ira_allocno_t *allocno, ira_allocno_t *start, |
| 1307 | ira_allocno_t *from, int *divisor) |
| 1308 | { |
| 1309 | struct update_cost_queue_elem *elem; |
| 1310 | |
| 1311 | if (update_cost_queue == NULLnullptr) |
| 1312 | return false; |
| 1313 | |
| 1314 | *allocno = update_cost_queue; |
| 1315 | elem = &update_cost_queue_elems[ALLOCNO_NUM (*allocno)((*allocno)->num)]; |
| 1316 | *start = elem->start; |
| 1317 | *from = elem->from; |
| 1318 | *divisor = elem->divisor; |
| 1319 | update_cost_queue = elem->next; |
| 1320 | return true; |
| 1321 | } |
| 1322 | |
| 1323 | /* Increase costs of HARD_REGNO by UPDATE_COST and conflict cost by |
| 1324 | UPDATE_CONFLICT_COST for ALLOCNO. Return true if we really |
| 1325 | modified the cost. */ |
| 1326 | static bool |
| 1327 | update_allocno_cost (ira_allocno_t allocno, int hard_regno, |
| 1328 | int update_cost, int update_conflict_cost) |
| 1329 | { |
| 1330 | int i; |
| 1331 | enum reg_class aclass = ALLOCNO_CLASS (allocno)((allocno)->aclass); |
| 1332 | |
| 1333 | i = ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[aclass][hard_regno]; |
| 1334 | if (i < 0) |
| 1335 | return false; |
| 1336 | ira_allocate_and_set_or_copy_costs |
| 1337 | (&ALLOCNO_UPDATED_HARD_REG_COSTS (allocno)((allocno)->updated_hard_reg_costs), aclass, |
| 1338 | ALLOCNO_UPDATED_CLASS_COST (allocno)((allocno)->updated_class_cost), |
| 1339 | ALLOCNO_HARD_REG_COSTS (allocno)((allocno)->hard_reg_costs)); |
| 1340 | ira_allocate_and_set_or_copy_costs |
| 1341 | (&ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (allocno)((allocno)->updated_conflict_hard_reg_costs), |
| 1342 | aclass, 0, ALLOCNO_CONFLICT_HARD_REG_COSTS (allocno)((allocno)->conflict_hard_reg_costs)); |
| 1343 | ALLOCNO_UPDATED_HARD_REG_COSTS (allocno)((allocno)->updated_hard_reg_costs)[i] += update_cost; |
| 1344 | ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (allocno)((allocno)->updated_conflict_hard_reg_costs)[i] += update_conflict_cost; |
| 1345 | return true; |
| 1346 | } |
| 1347 | |
| 1348 | /* Return TRUE if the object OBJ conflicts with the allocno A. */ |
| 1349 | static bool |
| 1350 | object_conflicts_with_allocno_p (ira_object_t obj, ira_allocno_t a) |
| 1351 | { |
| 1352 | if (!OBJECT_CONFLICT_VEC_P (obj)((obj)->conflict_vec_p)) |
| 1353 | for (int word = 0; word < ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); word++) |
| 1354 | { |
| 1355 | ira_object_t another_obj = ALLOCNO_OBJECT (a, word)((a)->objects[word]); |
| 1356 | if (OBJECT_CONFLICT_ID (another_obj)((another_obj)->id) >= OBJECT_MIN (obj)((obj)->min) |
| 1357 | && OBJECT_CONFLICT_ID (another_obj)((another_obj)->id) <= OBJECT_MAX (obj)((obj)->max) |
| 1358 | && TEST_MINMAX_SET_BIT (OBJECT_CONFLICT_BITVEC (obj),__extension__ (({ int _min = (((obj)->min)), _max = (((obj )->max)), _i = (((another_obj)->id)); if (_i < _min || _i > _max) { fprintf (stderr, "\n%s: %d: error in %s: %d not in range [%d,%d]\n" , "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1360, __FUNCTION__, _i, _min, _max); (fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1360, __FUNCTION__)); } ((((long *)(obj)->conflicts_array ))[(unsigned) (_i - _min) / 64] & ((long) 1 << ((unsigned ) (_i - _min) % 64))); })) |
| 1359 | OBJECT_CONFLICT_ID (another_obj),__extension__ (({ int _min = (((obj)->min)), _max = (((obj )->max)), _i = (((another_obj)->id)); if (_i < _min || _i > _max) { fprintf (stderr, "\n%s: %d: error in %s: %d not in range [%d,%d]\n" , "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1360, __FUNCTION__, _i, _min, _max); (fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1360, __FUNCTION__)); } ((((long *)(obj)->conflicts_array ))[(unsigned) (_i - _min) / 64] & ((long) 1 << ((unsigned ) (_i - _min) % 64))); })) |
| 1360 | OBJECT_MIN (obj), OBJECT_MAX (obj))__extension__ (({ int _min = (((obj)->min)), _max = (((obj )->max)), _i = (((another_obj)->id)); if (_i < _min || _i > _max) { fprintf (stderr, "\n%s: %d: error in %s: %d not in range [%d,%d]\n" , "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1360, __FUNCTION__, _i, _min, _max); (fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1360, __FUNCTION__)); } ((((long *)(obj)->conflicts_array ))[(unsigned) (_i - _min) / 64] & ((long) 1 << ((unsigned ) (_i - _min) % 64))); }))) |
| 1361 | return true; |
| 1362 | } |
| 1363 | else |
| 1364 | { |
| 1365 | /* If this linear walk ever becomes a bottleneck we could add a |
| 1366 | conflict_vec_sorted_p flag and if not set, sort the conflicts after |
| 1367 | their ID so we can use a binary search. That would also require |
| 1368 | tracking the actual number of conflicts in the vector to not rely |
| 1369 | on the NULL termination. */ |
| 1370 | ira_object_conflict_iterator oci; |
| 1371 | ira_object_t conflict_obj; |
| 1372 | FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)for (ira_object_conflict_iter_init (&(oci), (obj)); ira_object_conflict_iter_cond (&(oci), &(conflict_obj));) |
| 1373 | if (OBJECT_ALLOCNO (conflict_obj)((conflict_obj)->allocno) == a) |
| 1374 | return true; |
| 1375 | } |
| 1376 | return false; |
| 1377 | } |
| 1378 | |
| 1379 | /* Return TRUE if allocnos A1 and A2 conflicts. Here we are |
| 1380 | interested only in conflicts of allocnos with intersecting allocno |
| 1381 | classes. */ |
| 1382 | static bool |
| 1383 | allocnos_conflict_p (ira_allocno_t a1, ira_allocno_t a2) |
| 1384 | { |
| 1385 | /* Compute the upper bound for the linear iteration when the object |
| 1386 | conflicts are represented as a sparse vector. In particular this |
| 1387 | will make sure we prefer O(1) bitvector testing. */ |
| 1388 | int num_conflicts_in_vec1 = 0, num_conflicts_in_vec2 = 0; |
| 1389 | for (int word = 0; word < ALLOCNO_NUM_OBJECTS (a1)((a1)->num_objects); ++word) |
| 1390 | if (OBJECT_CONFLICT_VEC_P (ALLOCNO_OBJECT (a1, word))((((a1)->objects[word]))->conflict_vec_p)) |
| 1391 | num_conflicts_in_vec1 += OBJECT_NUM_CONFLICTS (ALLOCNO_OBJECT (a1, word))((((a1)->objects[word]))->num_accumulated_conflicts); |
| 1392 | for (int word = 0; word < ALLOCNO_NUM_OBJECTS (a2)((a2)->num_objects); ++word) |
| 1393 | if (OBJECT_CONFLICT_VEC_P (ALLOCNO_OBJECT (a2, word))((((a2)->objects[word]))->conflict_vec_p)) |
| 1394 | num_conflicts_in_vec2 += OBJECT_NUM_CONFLICTS (ALLOCNO_OBJECT (a2, word))((((a2)->objects[word]))->num_accumulated_conflicts); |
| 1395 | if (num_conflicts_in_vec2 < num_conflicts_in_vec1) |
| 1396 | std::swap (a1, a2); |
| 1397 | |
| 1398 | for (int word = 0; word < ALLOCNO_NUM_OBJECTS (a1)((a1)->num_objects); word++) |
| 1399 | { |
| 1400 | ira_object_t obj = ALLOCNO_OBJECT (a1, word)((a1)->objects[word]); |
| 1401 | /* Take preferences of conflicting allocnos into account. */ |
| 1402 | if (object_conflicts_with_allocno_p (obj, a2)) |
| 1403 | return true; |
| 1404 | } |
| 1405 | return false; |
| 1406 | } |
| 1407 | |
| 1408 | /* Update (decrease if DECR_P) HARD_REGNO cost of allocnos connected |
| 1409 | by copies to ALLOCNO to increase chances to remove some copies as |
| 1410 | the result of subsequent assignment. Update conflict costs. |
| 1411 | Record cost updates if RECORD_P is true. */ |
| 1412 | static void |
| 1413 | update_costs_from_allocno (ira_allocno_t allocno, int hard_regno, |
| 1414 | int divisor, bool decr_p, bool record_p) |
| 1415 | { |
| 1416 | int cost, update_cost, update_conflict_cost; |
| 1417 | machine_mode mode; |
| 1418 | enum reg_class rclass, aclass; |
| 1419 | ira_allocno_t another_allocno, start = allocno, from = NULLnullptr; |
| 1420 | ira_copy_t cp, next_cp; |
| 1421 | |
| 1422 | rclass = REGNO_REG_CLASS (hard_regno)(regclass_map[(hard_regno)]); |
| 1423 | do |
| 1424 | { |
| 1425 | mode = ALLOCNO_MODE (allocno)((allocno)->mode); |
| 1426 | ira_init_register_move_cost_if_necessary (mode); |
| 1427 | for (cp = ALLOCNO_COPIES (allocno)((allocno)->allocno_copies); cp != NULLnullptr; cp = next_cp) |
| 1428 | { |
| 1429 | if (cp->first == allocno) |
| 1430 | { |
| 1431 | next_cp = cp->next_first_allocno_copy; |
| 1432 | another_allocno = cp->second; |
| 1433 | } |
| 1434 | else if (cp->second == allocno) |
| 1435 | { |
| 1436 | next_cp = cp->next_second_allocno_copy; |
| 1437 | another_allocno = cp->first; |
| 1438 | } |
| 1439 | else |
| 1440 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1440, __FUNCTION__)); |
| 1441 | |
| 1442 | if (another_allocno == from |
| 1443 | || (ALLOCNO_COLOR_DATA (another_allocno)((allocno_color_data_t) ((another_allocno)->add_data)) != NULLnullptr |
| 1444 | && (ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->first_thread_allocno |
| 1445 | != ALLOCNO_COLOR_DATA (another_allocno)((allocno_color_data_t) ((another_allocno)->add_data))->first_thread_allocno))) |
| 1446 | continue; |
| 1447 | |
| 1448 | aclass = ALLOCNO_CLASS (another_allocno)((another_allocno)->aclass); |
| 1449 | if (! TEST_HARD_REG_BIT (reg_class_contents(this_target_hard_regs->x_reg_class_contents)[aclass], |
| 1450 | hard_regno) |
| 1451 | || ALLOCNO_ASSIGNED_P (another_allocno)((another_allocno)->assigned_p)) |
| 1452 | continue; |
| 1453 | |
| 1454 | /* If we have different modes use the smallest one. It is |
| 1455 | a sub-register move. It is hard to predict what LRA |
| 1456 | will reload (the pseudo or its sub-register) but LRA |
| 1457 | will try to minimize the data movement. Also for some |
| 1458 | register classes bigger modes might be invalid, |
| 1459 | e.g. DImode for AREG on x86. For such cases the |
| 1460 | register move cost will be maximal. */ |
| 1461 | mode = narrower_subreg_mode (ALLOCNO_MODE (cp->first)((cp->first)->mode), |
| 1462 | ALLOCNO_MODE (cp->second)((cp->second)->mode)); |
| 1463 | |
| 1464 | ira_init_register_move_cost_if_necessary (mode); |
| 1465 | |
| 1466 | cost = (cp->second == allocno |
| 1467 | ? ira_register_move_cost(this_target_ira_int->x_ira_register_move_cost)[mode][rclass][aclass] |
| 1468 | : ira_register_move_cost(this_target_ira_int->x_ira_register_move_cost)[mode][aclass][rclass]); |
| 1469 | if (decr_p) |
| 1470 | cost = -cost; |
| 1471 | |
| 1472 | update_cost = cp->freq * cost / divisor; |
| 1473 | update_conflict_cost = update_cost; |
| 1474 | |
| 1475 | if (internal_flag_ira_verbose > 5 && ira_dump_file != NULLnullptr) |
| 1476 | fprintf (ira_dump_file, |
| 1477 | " a%dr%d (hr%d): update cost by %d, conflict cost by %d\n", |
| 1478 | ALLOCNO_NUM (another_allocno)((another_allocno)->num), ALLOCNO_REGNO (another_allocno)((another_allocno)->regno), |
| 1479 | hard_regno, update_cost, update_conflict_cost); |
| 1480 | if (update_cost == 0) |
| 1481 | continue; |
| 1482 | |
| 1483 | if (! update_allocno_cost (another_allocno, hard_regno, |
| 1484 | update_cost, update_conflict_cost)) |
| 1485 | continue; |
| 1486 | queue_update_cost (another_allocno, start, allocno, |
| 1487 | divisor * COST_HOP_DIVISOR4); |
| 1488 | if (record_p && ALLOCNO_COLOR_DATA (another_allocno)((allocno_color_data_t) ((another_allocno)->add_data)) != NULLnullptr) |
| 1489 | ALLOCNO_COLOR_DATA (another_allocno)((allocno_color_data_t) ((another_allocno)->add_data))->update_cost_records |
| 1490 | = get_update_cost_record (hard_regno, divisor, |
| 1491 | ALLOCNO_COLOR_DATA (another_allocno)((allocno_color_data_t) ((another_allocno)->add_data)) |
| 1492 | ->update_cost_records); |
| 1493 | } |
| 1494 | } |
| 1495 | while (get_next_update_cost (&allocno, &start, &from, &divisor)); |
| 1496 | } |
| 1497 | |
| 1498 | /* Decrease preferred ALLOCNO hard register costs and costs of |
| 1499 | allocnos connected to ALLOCNO through copy. */ |
| 1500 | static void |
| 1501 | update_costs_from_prefs (ira_allocno_t allocno) |
| 1502 | { |
| 1503 | ira_pref_t pref; |
| 1504 | |
| 1505 | start_update_cost (); |
| 1506 | for (pref = ALLOCNO_PREFS (allocno)((allocno)->allocno_prefs); pref != NULLnullptr; pref = pref->next_pref) |
| 1507 | { |
| 1508 | if (internal_flag_ira_verbose > 5 && ira_dump_file != NULLnullptr) |
| 1509 | fprintf (ira_dump_file, " Start updating from pref of hr%d for a%dr%d:\n", |
| 1510 | pref->hard_regno, ALLOCNO_NUM (allocno)((allocno)->num), ALLOCNO_REGNO (allocno)((allocno)->regno)); |
| 1511 | update_costs_from_allocno (allocno, pref->hard_regno, |
| 1512 | COST_HOP_DIVISOR4, true, true); |
| 1513 | } |
| 1514 | } |
| 1515 | |
| 1516 | /* Update (decrease if DECR_P) the cost of allocnos connected to |
| 1517 | ALLOCNO through copies to increase chances to remove some copies as |
| 1518 | the result of subsequent assignment. ALLOCNO was just assigned to |
| 1519 | a hard register. Record cost updates if RECORD_P is true. */ |
| 1520 | static void |
| 1521 | update_costs_from_copies (ira_allocno_t allocno, bool decr_p, bool record_p) |
| 1522 | { |
| 1523 | int hard_regno; |
| 1524 | |
| 1525 | hard_regno = ALLOCNO_HARD_REGNO (allocno)((allocno)->hard_regno); |
| 1526 | ira_assert (hard_regno >= 0 && ALLOCNO_CLASS (allocno) != NO_REGS)((void)(!(hard_regno >= 0 && ((allocno)->aclass ) != NO_REGS) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1526, __FUNCTION__), 0 : 0)); |
| 1527 | start_update_cost (); |
| 1528 | if (internal_flag_ira_verbose > 5 && ira_dump_file != NULLnullptr) |
| 1529 | fprintf (ira_dump_file, " Start updating from a%dr%d by copies:\n", |
| 1530 | ALLOCNO_NUM (allocno)((allocno)->num), ALLOCNO_REGNO (allocno)((allocno)->regno)); |
| 1531 | update_costs_from_allocno (allocno, hard_regno, 1, decr_p, record_p); |
| 1532 | } |
| 1533 | |
| 1534 | /* Update conflict_allocno_hard_prefs of allocnos conflicting with |
| 1535 | ALLOCNO. */ |
| 1536 | static void |
| 1537 | update_conflict_allocno_hard_prefs (ira_allocno_t allocno) |
| 1538 | { |
| 1539 | int l, nr = ALLOCNO_NUM_OBJECTS (allocno)((allocno)->num_objects); |
| 1540 | |
| 1541 | for (l = 0; l < nr; l++) |
| 1542 | { |
| 1543 | ira_object_t conflict_obj, obj = ALLOCNO_OBJECT (allocno, l)((allocno)->objects[l]); |
| 1544 | ira_object_conflict_iterator oci; |
| 1545 | |
| 1546 | FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)for (ira_object_conflict_iter_init (&(oci), (obj)); ira_object_conflict_iter_cond (&(oci), &(conflict_obj));) |
| 1547 | { |
| 1548 | ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj)((conflict_obj)->allocno); |
| 1549 | allocno_color_data_t conflict_data = ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data)); |
| 1550 | ira_pref_t pref; |
| 1551 | |
| 1552 | if (!(hard_reg_set_intersect_p |
| 1553 | (ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->profitable_hard_regs, |
| 1554 | conflict_data->profitable_hard_regs))) |
| 1555 | continue; |
| 1556 | for (pref = ALLOCNO_PREFS (allocno)((allocno)->allocno_prefs); |
| 1557 | pref != NULLnullptr; |
| 1558 | pref = pref->next_pref) |
| 1559 | conflict_data->conflict_allocno_hard_prefs += pref->freq; |
| 1560 | } |
| 1561 | } |
| 1562 | } |
| 1563 | |
| 1564 | /* Restore costs of allocnos connected to ALLOCNO by copies as it was |
| 1565 | before updating costs of these allocnos from given allocno. This |
| 1566 | is a wise thing to do as if given allocno did not get an expected |
| 1567 | hard reg, using smaller cost of the hard reg for allocnos connected |
| 1568 | by copies to given allocno becomes actually misleading. Free all |
| 1569 | update cost records for ALLOCNO as we don't need them anymore. */ |
| 1570 | static void |
| 1571 | restore_costs_from_copies (ira_allocno_t allocno) |
| 1572 | { |
| 1573 | struct update_cost_record *records, *curr; |
| 1574 | |
| 1575 | if (ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data)) == NULLnullptr) |
| 1576 | return; |
| 1577 | records = ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->update_cost_records; |
| 1578 | start_update_cost (); |
| 1579 | if (internal_flag_ira_verbose > 5 && ira_dump_file != NULLnullptr) |
| 1580 | fprintf (ira_dump_file, " Start restoring from a%dr%d:\n", |
| 1581 | ALLOCNO_NUM (allocno)((allocno)->num), ALLOCNO_REGNO (allocno)((allocno)->regno)); |
| 1582 | for (curr = records; curr != NULLnullptr; curr = curr->next) |
| 1583 | update_costs_from_allocno (allocno, curr->hard_regno, |
| 1584 | curr->divisor, true, false); |
| 1585 | free_update_cost_record_list (records); |
| 1586 | ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->update_cost_records = NULLnullptr; |
| 1587 | } |
| 1588 | |
| 1589 | /* This function updates COSTS (decrease if DECR_P) for hard_registers |
| 1590 | of ACLASS by conflict costs of the unassigned allocnos |
| 1591 | connected by copies with allocnos in update_cost_queue. This |
| 1592 | update increases chances to remove some copies. */ |
| 1593 | static void |
| 1594 | update_conflict_hard_regno_costs (int *costs, enum reg_class aclass, |
| 1595 | bool decr_p) |
| 1596 | { |
| 1597 | int i, cost, class_size, freq, mult, div, divisor; |
| 1598 | int index, hard_regno; |
| 1599 | int *conflict_costs; |
| 1600 | bool cont_p; |
| 1601 | enum reg_class another_aclass; |
| 1602 | ira_allocno_t allocno, another_allocno, start, from; |
| 1603 | ira_copy_t cp, next_cp; |
| 1604 | |
| 1605 | while (get_next_update_cost (&allocno, &start, &from, &divisor)) |
| 1606 | for (cp = ALLOCNO_COPIES (allocno)((allocno)->allocno_copies); cp != NULLnullptr; cp = next_cp) |
| 1607 | { |
| 1608 | if (cp->first == allocno) |
| 1609 | { |
| 1610 | next_cp = cp->next_first_allocno_copy; |
| 1611 | another_allocno = cp->second; |
| 1612 | } |
| 1613 | else if (cp->second == allocno) |
| 1614 | { |
| 1615 | next_cp = cp->next_second_allocno_copy; |
| 1616 | another_allocno = cp->first; |
| 1617 | } |
| 1618 | else |
| 1619 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1619, __FUNCTION__)); |
| 1620 | |
| 1621 | another_aclass = ALLOCNO_CLASS (another_allocno)((another_allocno)->aclass); |
| 1622 | if (another_allocno == from |
| 1623 | || ALLOCNO_ASSIGNED_P (another_allocno)((another_allocno)->assigned_p) |
| 1624 | || ALLOCNO_COLOR_DATA (another_allocno)((allocno_color_data_t) ((another_allocno)->add_data))->may_be_spilled_p |
| 1625 | || ! ira_reg_classes_intersect_p(this_target_ira->x_ira_reg_classes_intersect_p)[aclass][another_aclass]) |
| 1626 | continue; |
| 1627 | if (allocnos_conflict_p (another_allocno, start)) |
| 1628 | continue; |
| 1629 | |
| 1630 | class_size = ira_class_hard_regs_num(this_target_ira->x_ira_class_hard_regs_num)[another_aclass]; |
| 1631 | ira_allocate_and_copy_costs |
| 1632 | (&ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (another_allocno)((another_allocno)->updated_conflict_hard_reg_costs), |
| 1633 | another_aclass, ALLOCNO_CONFLICT_HARD_REG_COSTS (another_allocno)((another_allocno)->conflict_hard_reg_costs)); |
| 1634 | conflict_costs |
| 1635 | = ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (another_allocno)((another_allocno)->updated_conflict_hard_reg_costs); |
| 1636 | if (conflict_costs == NULLnullptr) |
| 1637 | cont_p = true; |
| 1638 | else |
| 1639 | { |
| 1640 | mult = cp->freq; |
| 1641 | freq = ALLOCNO_FREQ (another_allocno)((another_allocno)->freq); |
| 1642 | if (freq == 0) |
| 1643 | freq = 1; |
| 1644 | div = freq * divisor; |
| 1645 | cont_p = false; |
| 1646 | for (i = class_size - 1; i >= 0; i--) |
| 1647 | { |
| 1648 | hard_regno = ira_class_hard_regs(this_target_ira->x_ira_class_hard_regs)[another_aclass][i]; |
| 1649 | ira_assert (hard_regno >= 0)((void)(!(hard_regno >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1649, __FUNCTION__), 0 : 0)); |
| 1650 | index = ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[aclass][hard_regno]; |
| 1651 | if (index < 0) |
| 1652 | continue; |
| 1653 | cost = (int) (((int64_t) conflict_costs [i] * mult) / div); |
| 1654 | if (cost == 0) |
| 1655 | continue; |
| 1656 | cont_p = true; |
| 1657 | if (decr_p) |
| 1658 | cost = -cost; |
| 1659 | costs[index] += cost; |
| 1660 | } |
| 1661 | } |
| 1662 | /* Probably 5 hops will be enough. */ |
| 1663 | if (cont_p |
| 1664 | && divisor <= (COST_HOP_DIVISOR4 |
| 1665 | * COST_HOP_DIVISOR4 |
| 1666 | * COST_HOP_DIVISOR4 |
| 1667 | * COST_HOP_DIVISOR4)) |
| 1668 | queue_update_cost (another_allocno, start, from, divisor * COST_HOP_DIVISOR4); |
| 1669 | } |
| 1670 | } |
| 1671 | |
| 1672 | /* Set up conflicting (through CONFLICT_REGS) for each object of |
| 1673 | allocno A and the start allocno profitable regs (through |
| 1674 | START_PROFITABLE_REGS). Remember that the start profitable regs |
| 1675 | exclude hard regs which cannot hold value of mode of allocno A. |
| 1676 | This covers mostly cases when multi-register value should be |
| 1677 | aligned. */ |
| 1678 | static inline void |
| 1679 | get_conflict_and_start_profitable_regs (ira_allocno_t a, bool retry_p, |
| 1680 | HARD_REG_SET *conflict_regs, |
| 1681 | HARD_REG_SET *start_profitable_regs) |
| 1682 | { |
| 1683 | int i, nwords; |
| 1684 | ira_object_t obj; |
| 1685 | |
| 1686 | nwords = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 1687 | for (i = 0; i < nwords; i++) |
| 1688 | { |
| 1689 | obj = ALLOCNO_OBJECT (a, i)((a)->objects[i]); |
| 1690 | conflict_regs[i] = OBJECT_TOTAL_CONFLICT_HARD_REGS (obj)((obj)->total_conflict_hard_regs); |
| 1691 | } |
| 1692 | if (retry_p) |
| 1693 | *start_profitable_regs |
| 1694 | = (reg_class_contents(this_target_hard_regs->x_reg_class_contents)[ALLOCNO_CLASS (a)((a)->aclass)] |
| 1695 | &~ (ira_prohibited_class_mode_regs(this_target_ira->x_ira_prohibited_class_mode_regs) |
| 1696 | [ALLOCNO_CLASS (a)((a)->aclass)][ALLOCNO_MODE (a)((a)->mode)])); |
| 1697 | else |
| 1698 | *start_profitable_regs = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->profitable_hard_regs; |
| 1699 | } |
| 1700 | |
| 1701 | /* Return true if HARD_REGNO is ok for assigning to allocno A with |
| 1702 | PROFITABLE_REGS and whose objects have CONFLICT_REGS. */ |
| 1703 | static inline bool |
| 1704 | check_hard_reg_p (ira_allocno_t a, int hard_regno, |
| 1705 | HARD_REG_SET *conflict_regs, HARD_REG_SET profitable_regs) |
| 1706 | { |
| 1707 | int j, nwords, nregs; |
| 1708 | enum reg_class aclass; |
| 1709 | machine_mode mode; |
| 1710 | |
| 1711 | aclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 1712 | mode = ALLOCNO_MODE (a)((a)->mode); |
| 1713 | if (TEST_HARD_REG_BIT (ira_prohibited_class_mode_regs(this_target_ira->x_ira_prohibited_class_mode_regs)[aclass][mode], |
| 1714 | hard_regno)) |
| 1715 | return false; |
| 1716 | /* Checking only profitable hard regs. */ |
| 1717 | if (! TEST_HARD_REG_BIT (profitable_regs, hard_regno)) |
| 1718 | return false; |
| 1719 | nregs = hard_regno_nregs (hard_regno, mode); |
| 1720 | nwords = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 1721 | for (j = 0; j < nregs; j++) |
| 1722 | { |
| 1723 | int k; |
| 1724 | int set_to_test_start = 0, set_to_test_end = nwords; |
| 1725 | |
| 1726 | if (nregs == nwords) |
| 1727 | { |
| 1728 | if (REG_WORDS_BIG_ENDIAN0) |
| 1729 | set_to_test_start = nwords - j - 1; |
| 1730 | else |
| 1731 | set_to_test_start = j; |
| 1732 | set_to_test_end = set_to_test_start + 1; |
| 1733 | } |
| 1734 | for (k = set_to_test_start; k < set_to_test_end; k++) |
| 1735 | if (TEST_HARD_REG_BIT (conflict_regs[k], hard_regno + j)) |
| 1736 | break; |
| 1737 | if (k != set_to_test_end) |
| 1738 | break; |
| 1739 | } |
| 1740 | return j == nregs; |
| 1741 | } |
| 1742 | |
| 1743 | /* Return number of registers needed to be saved and restored at |
| 1744 | function prologue/epilogue if we allocate HARD_REGNO to hold value |
| 1745 | of MODE. */ |
| 1746 | static int |
| 1747 | calculate_saved_nregs (int hard_regno, machine_mode mode) |
| 1748 | { |
| 1749 | int i; |
| 1750 | int nregs = 0; |
| 1751 | |
| 1752 | ira_assert (hard_regno >= 0)((void)(!(hard_regno >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1752, __FUNCTION__), 0 : 0)); |
| 1753 | for (i = hard_regno_nregs (hard_regno, mode) - 1; i >= 0; i--) |
| 1754 | if (!allocated_hardreg_p[hard_regno + i] |
| 1755 | && !crtl(&x_rtl)->abi->clobbers_full_reg_p (hard_regno + i) |
| 1756 | && !LOCAL_REGNO (hard_regno + i)0) |
| 1757 | nregs++; |
| 1758 | return nregs; |
| 1759 | } |
| 1760 | |
| 1761 | /* Allocnos A1 and A2 are known to conflict. Check whether, in some loop L |
| 1762 | that is either the current loop or a nested subloop, the conflict is of |
| 1763 | the following form: |
| 1764 | |
| 1765 | - One allocno (X) is a cap allocno for some non-cap allocno X2. |
| 1766 | |
| 1767 | - X2 belongs to some loop L2. |
| 1768 | |
| 1769 | - The other allocno (Y) is a non-cap allocno. |
| 1770 | |
| 1771 | - Y is an ancestor of some allocno Y2 in L2. (Note that such a Y2 |
| 1772 | must exist, given that X and Y conflict.) |
| 1773 | |
| 1774 | - Y2 is not referenced in L2 (that is, ALLOCNO_NREFS (Y2) == 0). |
| 1775 | |
| 1776 | - Y can use a different allocation from Y2. |
| 1777 | |
| 1778 | In this case, Y's register is live across L2 but is not used within it, |
| 1779 | whereas X's register is used only within L2. The conflict is therefore |
| 1780 | only "soft", in that it can easily be avoided by spilling Y2 inside L2 |
| 1781 | without affecting any insn references. |
| 1782 | |
| 1783 | If the conflict does have this form, return the Y2 that would need to be |
| 1784 | spilled in order to allow X and Y (and thus A1 and A2) to use the same |
| 1785 | register. Return null otherwise. Returning null is conservatively correct; |
| 1786 | any nonnnull return value is an optimization. */ |
| 1787 | ira_allocno_t |
| 1788 | ira_soft_conflict (ira_allocno_t a1, ira_allocno_t a2) |
| 1789 | { |
| 1790 | /* Search for the loop L and its associated allocnos X and Y. */ |
| 1791 | int search_depth = 0; |
| 1792 | while (ALLOCNO_CAP_MEMBER (a1)((a1)->cap_member) && ALLOCNO_CAP_MEMBER (a2)((a2)->cap_member)) |
| 1793 | { |
| 1794 | a1 = ALLOCNO_CAP_MEMBER (a1)((a1)->cap_member); |
| 1795 | a2 = ALLOCNO_CAP_MEMBER (a2)((a2)->cap_member); |
| 1796 | if (search_depth++ > max_soft_conflict_loop_depth) |
| 1797 | return nullptr; |
| 1798 | } |
| 1799 | /* This must be true if A1 and A2 conflict. */ |
| 1800 | ira_assert (ALLOCNO_LOOP_TREE_NODE (a1) == ALLOCNO_LOOP_TREE_NODE (a2))((void)(!(((a1)->loop_tree_node) == ((a2)->loop_tree_node )) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1800, __FUNCTION__), 0 : 0)); |
| 1801 | |
| 1802 | /* Make A1 the cap allocno (X in the comment above) and A2 the |
| 1803 | non-cap allocno (Y in the comment above). */ |
| 1804 | if (ALLOCNO_CAP_MEMBER (a2)((a2)->cap_member)) |
| 1805 | std::swap (a1, a2); |
| 1806 | if (!ALLOCNO_CAP_MEMBER (a1)((a1)->cap_member)) |
| 1807 | return nullptr; |
| 1808 | |
| 1809 | /* Search for the real allocno that A1 caps (X2 in the comment above). */ |
| 1810 | do |
| 1811 | { |
| 1812 | a1 = ALLOCNO_CAP_MEMBER (a1)((a1)->cap_member); |
| 1813 | if (search_depth++ > max_soft_conflict_loop_depth) |
| 1814 | return nullptr; |
| 1815 | } |
| 1816 | while (ALLOCNO_CAP_MEMBER (a1)((a1)->cap_member)); |
| 1817 | |
| 1818 | /* Find the associated allocno for A2 (Y2 in the comment above). */ |
| 1819 | auto node = ALLOCNO_LOOP_TREE_NODE (a1)((a1)->loop_tree_node); |
| 1820 | auto local_a2 = node->regno_allocno_map[ALLOCNO_REGNO (a2)((a2)->regno)]; |
| 1821 | |
| 1822 | /* Find the parent of LOCAL_A2/Y2. LOCAL_A2 must be a descendant of A2 |
| 1823 | for the conflict query to make sense, so this parent lookup must succeed. |
| 1824 | |
| 1825 | If the parent allocno has no references, it is usually cheaper to |
| 1826 | spill at that loop level instead. Keep searching until we find |
| 1827 | a parent allocno that does have references (but don't look past |
| 1828 | the starting allocno). */ |
| 1829 | ira_allocno_t local_parent_a2; |
| 1830 | for (;;) |
| 1831 | { |
| 1832 | local_parent_a2 = ira_parent_allocno (local_a2); |
| 1833 | if (local_parent_a2 == a2 || ALLOCNO_NREFS (local_parent_a2)((local_parent_a2)->nrefs) != 0) |
| 1834 | break; |
| 1835 | local_a2 = local_parent_a2; |
| 1836 | } |
| 1837 | if (CHECKING_P1) |
| 1838 | { |
| 1839 | /* Sanity check to make sure that the conflict we've been given |
| 1840 | makes sense. */ |
| 1841 | auto test_a2 = local_parent_a2; |
| 1842 | while (test_a2 != a2) |
| 1843 | { |
| 1844 | test_a2 = ira_parent_allocno (test_a2); |
| 1845 | ira_assert (test_a2)((void)(!(test_a2) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1845, __FUNCTION__), 0 : 0)); |
| 1846 | } |
| 1847 | } |
| 1848 | if (local_a2 |
| 1849 | && ALLOCNO_NREFS (local_a2)((local_a2)->nrefs) == 0 |
| 1850 | && ira_subloop_allocnos_can_differ_p (local_parent_a2)) |
| 1851 | return local_a2; |
| 1852 | return nullptr; |
| 1853 | } |
| 1854 | |
| 1855 | /* The caller has decided to allocate HREGNO to A and has proved that |
| 1856 | this is safe. However, the allocation might require the kind of |
| 1857 | spilling described in the comment above ira_soft_conflict. |
| 1858 | The caller has recorded that: |
| 1859 | |
| 1860 | - The allocnos in ALLOCNOS_TO_SPILL are the ones that would need |
| 1861 | to be spilled to satisfy soft conflicts for at least one allocation |
| 1862 | (not necessarily HREGNO). |
| 1863 | |
| 1864 | - The soft conflicts apply only to A allocations that overlap |
| 1865 | SOFT_CONFLICT_REGS. |
| 1866 | |
| 1867 | If allocating HREGNO is subject to any soft conflicts, record the |
| 1868 | subloop allocnos that need to be spilled. */ |
| 1869 | static void |
| 1870 | spill_soft_conflicts (ira_allocno_t a, bitmap allocnos_to_spill, |
| 1871 | HARD_REG_SET soft_conflict_regs, int hregno) |
| 1872 | { |
| 1873 | auto nregs = hard_regno_nregs (hregno, ALLOCNO_MODE (a)((a)->mode)); |
| 1874 | bitmap_iterator bi; |
| 1875 | unsigned int i; |
| 1876 | EXECUTE_IF_SET_IN_BITMAP (allocnos_to_spill, 0, i, bi)for (bmp_iter_set_init (&(bi), (allocnos_to_spill), (0), & (i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (& (bi), &(i))) |
| 1877 | { |
| 1878 | /* SPILL_A needs to be spilled for at least one allocation |
| 1879 | (not necessarily this one). */ |
| 1880 | auto spill_a = ira_allocnos[i]; |
| 1881 | |
| 1882 | /* Find the corresponding allocno for this loop. */ |
| 1883 | auto conflict_a = spill_a; |
| 1884 | do |
| 1885 | { |
| 1886 | conflict_a = ira_parent_or_cap_allocno (conflict_a); |
| 1887 | ira_assert (conflict_a)((void)(!(conflict_a) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1887, __FUNCTION__), 0 : 0)); |
| 1888 | } |
| 1889 | while (ALLOCNO_LOOP_TREE_NODE (conflict_a)((conflict_a)->loop_tree_node)->level |
| 1890 | > ALLOCNO_LOOP_TREE_NODE (a)((a)->loop_tree_node)->level); |
| 1891 | |
| 1892 | ira_assert (ALLOCNO_LOOP_TREE_NODE (conflict_a)((void)(!(((conflict_a)->loop_tree_node) == ((a)->loop_tree_node )) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1893, __FUNCTION__), 0 : 0)) |
| 1893 | == ALLOCNO_LOOP_TREE_NODE (a))((void)(!(((conflict_a)->loop_tree_node) == ((a)->loop_tree_node )) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1893, __FUNCTION__), 0 : 0)); |
| 1894 | |
| 1895 | if (conflict_a == a) |
| 1896 | { |
| 1897 | /* SPILL_A is a descendant of A. We don't know (and don't need |
| 1898 | to know) which cap allocnos have a soft conflict with A. |
| 1899 | All we need to do is test whether the soft conflict applies |
| 1900 | to the chosen allocation. */ |
| 1901 | if (ira_hard_reg_set_intersection_p (hregno, ALLOCNO_MODE (a)((a)->mode), |
| 1902 | soft_conflict_regs)) |
| 1903 | ALLOCNO_MIGHT_CONFLICT_WITH_PARENT_P (spill_a)((spill_a)->might_conflict_with_parent_p) = true; |
| 1904 | } |
| 1905 | else |
| 1906 | { |
| 1907 | /* SPILL_A is a descendant of CONFLICT_A, which has a soft conflict |
| 1908 | with A. Test whether the soft conflict applies to the current |
| 1909 | allocation. */ |
| 1910 | ira_assert (ira_soft_conflict (a, conflict_a) == spill_a)((void)(!(ira_soft_conflict (a, conflict_a) == spill_a) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1910, __FUNCTION__), 0 : 0)); |
| 1911 | auto conflict_hregno = ALLOCNO_HARD_REGNO (conflict_a)((conflict_a)->hard_regno); |
| 1912 | ira_assert (conflict_hregno >= 0)((void)(!(conflict_hregno >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1912, __FUNCTION__), 0 : 0)); |
| 1913 | auto conflict_nregs = hard_regno_nregs (conflict_hregno, |
| 1914 | ALLOCNO_MODE (conflict_a)((conflict_a)->mode)); |
| 1915 | if (hregno + nregs > conflict_hregno |
| 1916 | && conflict_hregno + conflict_nregs > hregno) |
| 1917 | ALLOCNO_MIGHT_CONFLICT_WITH_PARENT_P (spill_a)((spill_a)->might_conflict_with_parent_p) = true; |
| 1918 | } |
| 1919 | } |
| 1920 | } |
| 1921 | |
| 1922 | /* Choose a hard register for allocno A. If RETRY_P is TRUE, it means |
| 1923 | that the function called from function |
| 1924 | `ira_reassign_conflict_allocnos' and `allocno_reload_assign'. In |
| 1925 | this case some allocno data are not defined or updated and we |
| 1926 | should not touch these data. The function returns true if we |
| 1927 | managed to assign a hard register to the allocno. |
| 1928 | |
| 1929 | To assign a hard register, first of all we calculate all conflict |
| 1930 | hard registers which can come from conflicting allocnos with |
| 1931 | already assigned hard registers. After that we find first free |
| 1932 | hard register with the minimal cost. During hard register cost |
| 1933 | calculation we take conflict hard register costs into account to |
| 1934 | give a chance for conflicting allocnos to get a better hard |
| 1935 | register in the future. |
| 1936 | |
| 1937 | If the best hard register cost is bigger than cost of memory usage |
| 1938 | for the allocno, we don't assign a hard register to given allocno |
| 1939 | at all. |
| 1940 | |
| 1941 | If we assign a hard register to the allocno, we update costs of the |
| 1942 | hard register for allocnos connected by copies to improve a chance |
| 1943 | to coalesce insns represented by the copies when we assign hard |
| 1944 | registers to the allocnos connected by the copies. */ |
| 1945 | static bool |
| 1946 | assign_hard_reg (ira_allocno_t a, bool retry_p) |
| 1947 | { |
| 1948 | HARD_REG_SET conflicting_regs[2], profitable_hard_regs; |
| 1949 | int i, j, hard_regno, best_hard_regno, class_size; |
| 1950 | int cost, mem_cost, min_cost, full_cost, min_full_cost, nwords, word; |
| 1951 | int *a_costs; |
| 1952 | enum reg_class aclass; |
| 1953 | machine_mode mode; |
| 1954 | static int costs[FIRST_PSEUDO_REGISTER76], full_costs[FIRST_PSEUDO_REGISTER76]; |
| 1955 | int saved_nregs; |
| 1956 | enum reg_class rclass; |
| 1957 | int add_cost; |
| 1958 | #ifdef STACK_REGS |
| 1959 | bool no_stack_reg_p; |
| 1960 | #endif |
| 1961 | auto_bitmap allocnos_to_spill; |
| 1962 | HARD_REG_SET soft_conflict_regs = {}; |
| 1963 | |
| 1964 | ira_assert (! ALLOCNO_ASSIGNED_P (a))((void)(!(! ((a)->assigned_p)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 1964, __FUNCTION__), 0 : 0)); |
| 1965 | get_conflict_and_start_profitable_regs (a, retry_p, |
| 1966 | conflicting_regs, |
| 1967 | &profitable_hard_regs); |
| 1968 | aclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 1969 | class_size = ira_class_hard_regs_num(this_target_ira->x_ira_class_hard_regs_num)[aclass]; |
| 1970 | best_hard_regno = -1; |
| 1971 | mem_cost = 0; |
| 1972 | memset (costs, 0, sizeof (int) * class_size); |
| 1973 | memset (full_costs, 0, sizeof (int) * class_size); |
| 1974 | #ifdef STACK_REGS |
| 1975 | no_stack_reg_p = false; |
| 1976 | #endif |
| 1977 | if (! retry_p) |
| 1978 | start_update_cost (); |
| 1979 | mem_cost += ALLOCNO_UPDATED_MEMORY_COST (a)((a)->updated_memory_cost); |
| 1980 | |
| 1981 | ira_allocate_and_copy_costs (&ALLOCNO_UPDATED_HARD_REG_COSTS (a)((a)->updated_hard_reg_costs), |
| 1982 | aclass, ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs)); |
| 1983 | a_costs = ALLOCNO_UPDATED_HARD_REG_COSTS (a)((a)->updated_hard_reg_costs); |
| 1984 | #ifdef STACK_REGS |
| 1985 | no_stack_reg_p = no_stack_reg_p || ALLOCNO_TOTAL_NO_STACK_REG_P (a)((a)->total_no_stack_reg_p); |
| 1986 | #endif |
| 1987 | cost = ALLOCNO_UPDATED_CLASS_COST (a)((a)->updated_class_cost); |
| 1988 | for (i = 0; i < class_size; i++) |
| 1989 | if (a_costs != NULLnullptr) |
| 1990 | { |
| 1991 | costs[i] += a_costs[i]; |
| 1992 | full_costs[i] += a_costs[i]; |
| 1993 | } |
| 1994 | else |
| 1995 | { |
| 1996 | costs[i] += cost; |
| 1997 | full_costs[i] += cost; |
| 1998 | } |
| 1999 | nwords = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 2000 | curr_allocno_process++; |
| 2001 | for (word = 0; word < nwords; word++) |
| 2002 | { |
| 2003 | ira_object_t conflict_obj; |
| 2004 | ira_object_t obj = ALLOCNO_OBJECT (a, word)((a)->objects[word]); |
| 2005 | ira_object_conflict_iterator oci; |
| 2006 | |
| 2007 | /* Take preferences of conflicting allocnos into account. */ |
| 2008 | FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)for (ira_object_conflict_iter_init (&(oci), (obj)); ira_object_conflict_iter_cond (&(oci), &(conflict_obj));) |
| 2009 | { |
| 2010 | ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj)((conflict_obj)->allocno); |
| 2011 | enum reg_class conflict_aclass; |
| 2012 | allocno_color_data_t data = ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data)); |
| 2013 | |
| 2014 | /* Reload can give another class so we need to check all |
| 2015 | allocnos. */ |
| 2016 | if (!retry_p |
| 2017 | && ((!ALLOCNO_ASSIGNED_P (conflict_a)((conflict_a)->assigned_p) |
| 2018 | || ALLOCNO_HARD_REGNO (conflict_a)((conflict_a)->hard_regno) < 0) |
| 2019 | && !(hard_reg_set_intersect_p |
| 2020 | (profitable_hard_regs, |
| 2021 | ALLOCNO_COLOR_DATA((allocno_color_data_t) ((conflict_a)->add_data)) |
| 2022 | (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data))->profitable_hard_regs)))) |
| 2023 | { |
| 2024 | /* All conflict allocnos are in consideration bitmap |
| 2025 | when retry_p is false. It might change in future and |
| 2026 | if it happens the assert will be broken. It means |
| 2027 | the code should be modified for the new |
| 2028 | assumptions. */ |
| 2029 | ira_assert (bitmap_bit_p (consideration_allocno_bitmap,((void)(!(bitmap_bit_p (consideration_allocno_bitmap, ((conflict_a )->num))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2030, __FUNCTION__), 0 : 0)) |
| 2030 | ALLOCNO_NUM (conflict_a)))((void)(!(bitmap_bit_p (consideration_allocno_bitmap, ((conflict_a )->num))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2030, __FUNCTION__), 0 : 0)); |
| 2031 | continue; |
| 2032 | } |
| 2033 | conflict_aclass = ALLOCNO_CLASS (conflict_a)((conflict_a)->aclass); |
| 2034 | ira_assert (ira_reg_classes_intersect_p((void)(!((this_target_ira->x_ira_reg_classes_intersect_p) [aclass][conflict_aclass]) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2035, __FUNCTION__), 0 : 0)) |
| 2035 | [aclass][conflict_aclass])((void)(!((this_target_ira->x_ira_reg_classes_intersect_p) [aclass][conflict_aclass]) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2035, __FUNCTION__), 0 : 0)); |
| 2036 | if (ALLOCNO_ASSIGNED_P (conflict_a)((conflict_a)->assigned_p)) |
| 2037 | { |
| 2038 | hard_regno = ALLOCNO_HARD_REGNO (conflict_a)((conflict_a)->hard_regno); |
| 2039 | if (hard_regno >= 0 |
| 2040 | && (ira_hard_reg_set_intersection_p |
| 2041 | (hard_regno, ALLOCNO_MODE (conflict_a)((conflict_a)->mode), |
| 2042 | reg_class_contents(this_target_hard_regs->x_reg_class_contents)[aclass]))) |
| 2043 | { |
| 2044 | int n_objects = ALLOCNO_NUM_OBJECTS (conflict_a)((conflict_a)->num_objects); |
| 2045 | int conflict_nregs; |
| 2046 | |
| 2047 | mode = ALLOCNO_MODE (conflict_a)((conflict_a)->mode); |
| 2048 | conflict_nregs = hard_regno_nregs (hard_regno, mode); |
| 2049 | auto spill_a = (retry_p |
| 2050 | ? nullptr |
| 2051 | : ira_soft_conflict (a, conflict_a)); |
| 2052 | if (spill_a) |
| 2053 | { |
| 2054 | if (bitmap_set_bit (allocnos_to_spill, |
| 2055 | ALLOCNO_NUM (spill_a)((spill_a)->num))) |
| 2056 | { |
| 2057 | ira_loop_border_costs border_costs (spill_a); |
| 2058 | auto cost = border_costs.spill_inside_loop_cost (); |
| 2059 | auto note_conflict = [&](int r) |
| 2060 | { |
| 2061 | SET_HARD_REG_BIT (soft_conflict_regs, r); |
| 2062 | auto hri = ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[aclass][r]; |
| 2063 | if (hri >= 0) |
| 2064 | { |
| 2065 | costs[hri] += cost; |
| 2066 | full_costs[hri] += cost; |
| 2067 | } |
| 2068 | }; |
| 2069 | for (int r = hard_regno; |
| 2070 | r >= 0 && (int) end_hard_regno (mode, r) > hard_regno; |
| 2071 | r--) |
| 2072 | note_conflict (r); |
| 2073 | for (int r = hard_regno + 1; |
| 2074 | r < hard_regno + conflict_nregs; |
| 2075 | r++) |
| 2076 | note_conflict (r); |
| 2077 | } |
| 2078 | } |
| 2079 | else |
| 2080 | { |
| 2081 | if (conflict_nregs == n_objects && conflict_nregs > 1) |
| 2082 | { |
| 2083 | int num = OBJECT_SUBWORD (conflict_obj)((conflict_obj)->subword); |
| 2084 | |
| 2085 | if (REG_WORDS_BIG_ENDIAN0) |
| 2086 | SET_HARD_REG_BIT (conflicting_regs[word], |
| 2087 | hard_regno + n_objects - num - 1); |
| 2088 | else |
| 2089 | SET_HARD_REG_BIT (conflicting_regs[word], |
| 2090 | hard_regno + num); |
| 2091 | } |
| 2092 | else |
| 2093 | conflicting_regs[word] |
| 2094 | |= ira_reg_mode_hard_regset(this_target_ira_int->x_ira_reg_mode_hard_regset)[hard_regno][mode]; |
| 2095 | if (hard_reg_set_subset_p (profitable_hard_regs, |
| 2096 | conflicting_regs[word])) |
| 2097 | goto fail; |
| 2098 | } |
| 2099 | } |
| 2100 | } |
| 2101 | else if (! retry_p |
| 2102 | && ! ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data))->may_be_spilled_p |
| 2103 | /* Don't process the conflict allocno twice. */ |
| 2104 | && (ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data))->last_process |
| 2105 | != curr_allocno_process)) |
| 2106 | { |
| 2107 | int k, *conflict_costs; |
| 2108 | |
| 2109 | ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data))->last_process |
| 2110 | = curr_allocno_process; |
| 2111 | ira_allocate_and_copy_costs |
| 2112 | (&ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (conflict_a)((conflict_a)->updated_conflict_hard_reg_costs), |
| 2113 | conflict_aclass, |
| 2114 | ALLOCNO_CONFLICT_HARD_REG_COSTS (conflict_a)((conflict_a)->conflict_hard_reg_costs)); |
| 2115 | conflict_costs |
| 2116 | = ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (conflict_a)((conflict_a)->updated_conflict_hard_reg_costs); |
| 2117 | if (conflict_costs != NULLnullptr) |
| 2118 | for (j = class_size - 1; j >= 0; j--) |
| 2119 | { |
| 2120 | hard_regno = ira_class_hard_regs(this_target_ira->x_ira_class_hard_regs)[aclass][j]; |
| 2121 | ira_assert (hard_regno >= 0)((void)(!(hard_regno >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2121, __FUNCTION__), 0 : 0)); |
| 2122 | k = ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[conflict_aclass][hard_regno]; |
| 2123 | if (k < 0 |
| 2124 | /* If HARD_REGNO is not available for CONFLICT_A, |
| 2125 | the conflict would be ignored, since HARD_REGNO |
| 2126 | will never be assigned to CONFLICT_A. */ |
| 2127 | || !TEST_HARD_REG_BIT (data->profitable_hard_regs, |
| 2128 | hard_regno)) |
| 2129 | continue; |
| 2130 | full_costs[j] -= conflict_costs[k]; |
| 2131 | } |
| 2132 | queue_update_cost (conflict_a, conflict_a, NULLnullptr, COST_HOP_DIVISOR4); |
| 2133 | } |
| 2134 | } |
| 2135 | } |
| 2136 | if (! retry_p) |
| 2137 | /* Take into account preferences of allocnos connected by copies to |
| 2138 | the conflict allocnos. */ |
| 2139 | update_conflict_hard_regno_costs (full_costs, aclass, true); |
| 2140 | |
| 2141 | /* Take preferences of allocnos connected by copies into |
| 2142 | account. */ |
| 2143 | if (! retry_p) |
| 2144 | { |
| 2145 | start_update_cost (); |
| 2146 | queue_update_cost (a, a, NULLnullptr, COST_HOP_DIVISOR4); |
| 2147 | update_conflict_hard_regno_costs (full_costs, aclass, false); |
| 2148 | } |
| 2149 | min_cost = min_full_cost = INT_MAX2147483647; |
| 2150 | /* We don't care about giving callee saved registers to allocnos no |
| 2151 | living through calls because call clobbered registers are |
| 2152 | allocated first (it is usual practice to put them first in |
| 2153 | REG_ALLOC_ORDER). */ |
| 2154 | mode = ALLOCNO_MODE (a)((a)->mode); |
| 2155 | for (i = 0; i < class_size; i++) |
| 2156 | { |
| 2157 | hard_regno = ira_class_hard_regs(this_target_ira->x_ira_class_hard_regs)[aclass][i]; |
| 2158 | #ifdef STACK_REGS |
| 2159 | if (no_stack_reg_p |
| 2160 | && FIRST_STACK_REG8 <= hard_regno && hard_regno <= LAST_STACK_REG15) |
| 2161 | continue; |
| 2162 | #endif |
| 2163 | if (! check_hard_reg_p (a, hard_regno, |
| 2164 | conflicting_regs, profitable_hard_regs)) |
| 2165 | continue; |
| 2166 | cost = costs[i]; |
| 2167 | full_cost = full_costs[i]; |
| 2168 | if (!HONOR_REG_ALLOC_ORDER0) |
| 2169 | { |
| 2170 | if ((saved_nregs = calculate_saved_nregs (hard_regno, mode)) != 0) |
| 2171 | /* We need to save/restore the hard register in |
| 2172 | epilogue/prologue. Therefore we increase the cost. */ |
| 2173 | { |
| 2174 | rclass = REGNO_REG_CLASS (hard_regno)(regclass_map[(hard_regno)]); |
| 2175 | add_cost = ((ira_memory_move_cost(this_target_ira->x_ira_memory_move_cost)[mode][rclass][0] |
| 2176 | + ira_memory_move_cost(this_target_ira->x_ira_memory_move_cost)[mode][rclass][1]) |
| 2177 | * saved_nregs / hard_regno_nregs (hard_regno, |
| 2178 | mode) - 1); |
| 2179 | cost += add_cost; |
| 2180 | full_cost += add_cost; |
| 2181 | } |
| 2182 | } |
| 2183 | if (min_cost > cost) |
| 2184 | min_cost = cost; |
| 2185 | if (min_full_cost > full_cost) |
| 2186 | { |
| 2187 | min_full_cost = full_cost; |
| 2188 | best_hard_regno = hard_regno; |
| 2189 | ira_assert (hard_regno >= 0)((void)(!(hard_regno >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2189, __FUNCTION__), 0 : 0)); |
| 2190 | } |
| 2191 | if (internal_flag_ira_verbose > 5 && ira_dump_file != NULLnullptr) |
| 2192 | fprintf (ira_dump_file, "(%d=%d,%d) ", hard_regno, cost, full_cost); |
| 2193 | } |
| 2194 | if (internal_flag_ira_verbose > 5 && ira_dump_file != NULLnullptr) |
| 2195 | fprintf (ira_dump_file, "\n"); |
| 2196 | if (min_full_cost > mem_cost |
| 2197 | /* Do not spill static chain pointer pseudo when non-local goto |
| 2198 | is used. */ |
| 2199 | && ! non_spilled_static_chain_regno_p (ALLOCNO_REGNO (a)((a)->regno))) |
| 2200 | { |
| 2201 | if (! retry_p && internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 2202 | fprintf (ira_dump_file, "(memory is more profitable %d vs %d) ", |
| 2203 | mem_cost, min_full_cost); |
| 2204 | best_hard_regno = -1; |
| 2205 | } |
| 2206 | fail: |
| 2207 | if (best_hard_regno >= 0) |
| 2208 | { |
| 2209 | for (i = hard_regno_nregs (best_hard_regno, mode) - 1; i >= 0; i--) |
| 2210 | allocated_hardreg_p[best_hard_regno + i] = true; |
| 2211 | spill_soft_conflicts (a, allocnos_to_spill, soft_conflict_regs, |
| 2212 | best_hard_regno); |
| 2213 | } |
| 2214 | if (! retry_p) |
| 2215 | restore_costs_from_copies (a); |
| 2216 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = best_hard_regno; |
| 2217 | ALLOCNO_ASSIGNED_P (a)((a)->assigned_p) = true; |
| 2218 | if (best_hard_regno >= 0 && !retry_p) |
| 2219 | update_costs_from_copies (a, true, true); |
| 2220 | ira_assert (ALLOCNO_CLASS (a) == aclass)((void)(!(((a)->aclass) == aclass) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2220, __FUNCTION__), 0 : 0)); |
| 2221 | /* We don't need updated costs anymore. */ |
| 2222 | ira_free_allocno_updated_costs (a); |
| 2223 | return best_hard_regno >= 0; |
| 2224 | } |
| 2225 | |
| 2226 | |
| 2227 | |
| 2228 | /* An array used to sort copies. */ |
| 2229 | static ira_copy_t *sorted_copies; |
| 2230 | |
| 2231 | /* If allocno A is a cap, return non-cap allocno from which A is |
| 2232 | created. Otherwise, return A. */ |
| 2233 | static ira_allocno_t |
| 2234 | get_cap_member (ira_allocno_t a) |
| 2235 | { |
| 2236 | ira_allocno_t member; |
| 2237 | |
| 2238 | while ((member = ALLOCNO_CAP_MEMBER (a)((a)->cap_member)) != NULLnullptr) |
| 2239 | a = member; |
| 2240 | return a; |
| 2241 | } |
| 2242 | |
| 2243 | /* Return TRUE if live ranges of allocnos A1 and A2 intersect. It is |
| 2244 | used to find a conflict for new allocnos or allocnos with the |
| 2245 | different allocno classes. */ |
| 2246 | static bool |
| 2247 | allocnos_conflict_by_live_ranges_p (ira_allocno_t a1, ira_allocno_t a2) |
| 2248 | { |
| 2249 | rtx reg1, reg2; |
| 2250 | int i, j; |
| 2251 | int n1 = ALLOCNO_NUM_OBJECTS (a1)((a1)->num_objects); |
| 2252 | int n2 = ALLOCNO_NUM_OBJECTS (a2)((a2)->num_objects); |
| 2253 | |
| 2254 | if (a1 == a2) |
| 2255 | return false; |
| 2256 | reg1 = regno_reg_rtx[ALLOCNO_REGNO (a1)((a1)->regno)]; |
| 2257 | reg2 = regno_reg_rtx[ALLOCNO_REGNO (a2)((a2)->regno)]; |
| 2258 | if (reg1 != NULLnullptr && reg2 != NULLnullptr |
| 2259 | && ORIGINAL_REGNO (reg1)(__extension__ ({ __typeof ((reg1)) const _rtx = ((reg1)); if (((enum rtx_code) (_rtx)->code) != REG) rtl_check_failed_flag ("ORIGINAL_REGNO", _rtx, "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2259, __FUNCTION__); _rtx; })->u2.original_regno) == ORIGINAL_REGNO (reg2)(__extension__ ({ __typeof ((reg2)) const _rtx = ((reg2)); if (((enum rtx_code) (_rtx)->code) != REG) rtl_check_failed_flag ("ORIGINAL_REGNO", _rtx, "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2259, __FUNCTION__); _rtx; })->u2.original_regno)) |
| 2260 | return false; |
| 2261 | |
| 2262 | /* We don't keep live ranges for caps because they can be quite big. |
| 2263 | Use ranges of non-cap allocno from which caps are created. */ |
| 2264 | a1 = get_cap_member (a1); |
| 2265 | a2 = get_cap_member (a2); |
| 2266 | for (i = 0; i < n1; i++) |
| 2267 | { |
| 2268 | ira_object_t c1 = ALLOCNO_OBJECT (a1, i)((a1)->objects[i]); |
| 2269 | |
| 2270 | for (j = 0; j < n2; j++) |
| 2271 | { |
| 2272 | ira_object_t c2 = ALLOCNO_OBJECT (a2, j)((a2)->objects[j]); |
| 2273 | |
| 2274 | if (ira_live_ranges_intersect_p (OBJECT_LIVE_RANGES (c1)((c1)->live_ranges), |
| 2275 | OBJECT_LIVE_RANGES (c2)((c2)->live_ranges))) |
| 2276 | return true; |
| 2277 | } |
| 2278 | } |
| 2279 | return false; |
| 2280 | } |
| 2281 | |
| 2282 | /* The function is used to sort copies according to their execution |
| 2283 | frequencies. */ |
| 2284 | static int |
| 2285 | copy_freq_compare_func (const void *v1p, const void *v2p) |
| 2286 | { |
| 2287 | ira_copy_t cp1 = *(const ira_copy_t *) v1p, cp2 = *(const ira_copy_t *) v2p; |
| 2288 | int pri1, pri2; |
| 2289 | |
| 2290 | pri1 = cp1->freq; |
| 2291 | pri2 = cp2->freq; |
| 2292 | if (pri2 - pri1) |
| 2293 | return pri2 - pri1; |
| 2294 | |
| 2295 | /* If frequencies are equal, sort by copies, so that the results of |
| 2296 | qsort leave nothing to chance. */ |
| 2297 | return cp1->num - cp2->num; |
| 2298 | } |
| 2299 | |
| 2300 | |
| 2301 | |
| 2302 | /* Return true if any allocno from thread of A1 conflicts with any |
| 2303 | allocno from thread A2. */ |
| 2304 | static bool |
| 2305 | allocno_thread_conflict_p (ira_allocno_t a1, ira_allocno_t a2) |
| 2306 | { |
| 2307 | ira_allocno_t a, conflict_a; |
| 2308 | |
| 2309 | for (a = ALLOCNO_COLOR_DATA (a2)((allocno_color_data_t) ((a2)->add_data))->next_thread_allocno;; |
| 2310 | a = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->next_thread_allocno) |
| 2311 | { |
| 2312 | for (conflict_a = ALLOCNO_COLOR_DATA (a1)((allocno_color_data_t) ((a1)->add_data))->next_thread_allocno;; |
| 2313 | conflict_a = ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data))->next_thread_allocno) |
| 2314 | { |
| 2315 | if (allocnos_conflict_by_live_ranges_p (a, conflict_a)) |
| 2316 | return true; |
| 2317 | if (conflict_a == a1) |
| 2318 | break; |
| 2319 | } |
| 2320 | if (a == a2) |
| 2321 | break; |
| 2322 | } |
| 2323 | return false; |
| 2324 | } |
| 2325 | |
| 2326 | /* Merge two threads given correspondingly by their first allocnos T1 |
| 2327 | and T2 (more accurately merging T2 into T1). */ |
| 2328 | static void |
| 2329 | merge_threads (ira_allocno_t t1, ira_allocno_t t2) |
| 2330 | { |
| 2331 | ira_allocno_t a, next, last; |
| 2332 | |
| 2333 | gcc_assert (t1 != t2((void)(!(t1 != t2 && ((allocno_color_data_t) ((t1)-> add_data))->first_thread_allocno == t1 && ((allocno_color_data_t ) ((t2)->add_data))->first_thread_allocno == t2) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2335, __FUNCTION__), 0 : 0)) |
| 2334 | && ALLOCNO_COLOR_DATA (t1)->first_thread_allocno == t1((void)(!(t1 != t2 && ((allocno_color_data_t) ((t1)-> add_data))->first_thread_allocno == t1 && ((allocno_color_data_t ) ((t2)->add_data))->first_thread_allocno == t2) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2335, __FUNCTION__), 0 : 0)) |
| 2335 | && ALLOCNO_COLOR_DATA (t2)->first_thread_allocno == t2)((void)(!(t1 != t2 && ((allocno_color_data_t) ((t1)-> add_data))->first_thread_allocno == t1 && ((allocno_color_data_t ) ((t2)->add_data))->first_thread_allocno == t2) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2335, __FUNCTION__), 0 : 0)); |
| 2336 | for (last = t2, a = ALLOCNO_COLOR_DATA (t2)((allocno_color_data_t) ((t2)->add_data))->next_thread_allocno;; |
| 2337 | a = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->next_thread_allocno) |
| 2338 | { |
| 2339 | ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->first_thread_allocno = t1; |
| 2340 | if (a == t2) |
| 2341 | break; |
| 2342 | last = a; |
| 2343 | } |
| 2344 | next = ALLOCNO_COLOR_DATA (t1)((allocno_color_data_t) ((t1)->add_data))->next_thread_allocno; |
| 2345 | ALLOCNO_COLOR_DATA (t1)((allocno_color_data_t) ((t1)->add_data))->next_thread_allocno = t2; |
| 2346 | ALLOCNO_COLOR_DATA (last)((allocno_color_data_t) ((last)->add_data))->next_thread_allocno = next; |
| 2347 | ALLOCNO_COLOR_DATA (t1)((allocno_color_data_t) ((t1)->add_data))->thread_freq += ALLOCNO_COLOR_DATA (t2)((allocno_color_data_t) ((t2)->add_data))->thread_freq; |
| 2348 | } |
| 2349 | |
| 2350 | /* Create threads by processing CP_NUM copies from sorted copies. We |
| 2351 | process the most expensive copies first. */ |
| 2352 | static void |
| 2353 | form_threads_from_copies (int cp_num) |
| 2354 | { |
| 2355 | ira_allocno_t a, thread1, thread2; |
| 2356 | ira_copy_t cp; |
| 2357 | |
| 2358 | qsort (sorted_copies, cp_num, sizeof (ira_copy_t), copy_freq_compare_func)gcc_qsort (sorted_copies, cp_num, sizeof (ira_copy_t), copy_freq_compare_func ); |
| 2359 | /* Form threads processing copies, most frequently executed |
| 2360 | first. */ |
| 2361 | for (int i = 0; i < cp_num; i++) |
| 2362 | { |
| 2363 | cp = sorted_copies[i]; |
| 2364 | thread1 = ALLOCNO_COLOR_DATA (cp->first)((allocno_color_data_t) ((cp->first)->add_data))->first_thread_allocno; |
| 2365 | thread2 = ALLOCNO_COLOR_DATA (cp->second)((allocno_color_data_t) ((cp->second)->add_data))->first_thread_allocno; |
| 2366 | if (thread1 == thread2) |
| 2367 | continue; |
| 2368 | if (! allocno_thread_conflict_p (thread1, thread2)) |
| 2369 | { |
| 2370 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 2371 | fprintf |
| 2372 | (ira_dump_file, |
| 2373 | " Forming thread by copy %d:a%dr%d-a%dr%d (freq=%d):\n", |
| 2374 | cp->num, ALLOCNO_NUM (cp->first)((cp->first)->num), ALLOCNO_REGNO (cp->first)((cp->first)->regno), |
| 2375 | ALLOCNO_NUM (cp->second)((cp->second)->num), ALLOCNO_REGNO (cp->second)((cp->second)->regno), |
| 2376 | cp->freq); |
| 2377 | merge_threads (thread1, thread2); |
| 2378 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 2379 | { |
| 2380 | thread1 = ALLOCNO_COLOR_DATA (thread1)((allocno_color_data_t) ((thread1)->add_data))->first_thread_allocno; |
| 2381 | fprintf (ira_dump_file, " Result (freq=%d): a%dr%d(%d)", |
| 2382 | ALLOCNO_COLOR_DATA (thread1)((allocno_color_data_t) ((thread1)->add_data))->thread_freq, |
| 2383 | ALLOCNO_NUM (thread1)((thread1)->num), ALLOCNO_REGNO (thread1)((thread1)->regno), |
| 2384 | ALLOCNO_FREQ (thread1)((thread1)->freq)); |
| 2385 | for (a = ALLOCNO_COLOR_DATA (thread1)((allocno_color_data_t) ((thread1)->add_data))->next_thread_allocno; |
| 2386 | a != thread1; |
| 2387 | a = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->next_thread_allocno) |
| 2388 | fprintf (ira_dump_file, " a%dr%d(%d)", |
| 2389 | ALLOCNO_NUM (a)((a)->num), ALLOCNO_REGNO (a)((a)->regno), |
| 2390 | ALLOCNO_FREQ (a)((a)->freq)); |
| 2391 | fprintf (ira_dump_file, "\n"); |
| 2392 | } |
| 2393 | } |
| 2394 | } |
| 2395 | } |
| 2396 | |
| 2397 | /* Create threads by processing copies of all alocnos from BUCKET. We |
| 2398 | process the most expensive copies first. */ |
| 2399 | static void |
| 2400 | form_threads_from_bucket (ira_allocno_t bucket) |
| 2401 | { |
| 2402 | ira_allocno_t a; |
| 2403 | ira_copy_t cp, next_cp; |
| 2404 | int cp_num = 0; |
| 2405 | |
| 2406 | for (a = bucket; a != NULLnullptr; a = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->next_bucket_allocno) |
| 2407 | { |
| 2408 | for (cp = ALLOCNO_COPIES (a)((a)->allocno_copies); cp != NULLnullptr; cp = next_cp) |
| 2409 | { |
| 2410 | if (cp->first == a) |
| 2411 | { |
| 2412 | next_cp = cp->next_first_allocno_copy; |
| 2413 | sorted_copies[cp_num++] = cp; |
| 2414 | } |
| 2415 | else if (cp->second == a) |
| 2416 | next_cp = cp->next_second_allocno_copy; |
| 2417 | else |
| 2418 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2418, __FUNCTION__)); |
| 2419 | } |
| 2420 | } |
| 2421 | form_threads_from_copies (cp_num); |
| 2422 | } |
| 2423 | |
| 2424 | /* Create threads by processing copies of colorable allocno A. We |
| 2425 | process most expensive copies first. */ |
| 2426 | static void |
| 2427 | form_threads_from_colorable_allocno (ira_allocno_t a) |
| 2428 | { |
| 2429 | ira_allocno_t another_a; |
| 2430 | ira_copy_t cp, next_cp; |
| 2431 | int cp_num = 0; |
| 2432 | |
| 2433 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 2434 | fprintf (ira_dump_file, " Forming thread from allocno a%dr%d:\n", |
| 2435 | ALLOCNO_NUM (a)((a)->num), ALLOCNO_REGNO (a)((a)->regno)); |
| 2436 | for (cp = ALLOCNO_COPIES (a)((a)->allocno_copies); cp != NULLnullptr; cp = next_cp) |
| 2437 | { |
| 2438 | if (cp->first == a) |
| 2439 | { |
| 2440 | next_cp = cp->next_first_allocno_copy; |
| 2441 | another_a = cp->second; |
| 2442 | } |
| 2443 | else if (cp->second == a) |
| 2444 | { |
| 2445 | next_cp = cp->next_second_allocno_copy; |
| 2446 | another_a = cp->first; |
| 2447 | } |
| 2448 | else |
| 2449 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2449, __FUNCTION__)); |
| 2450 | if ((! ALLOCNO_COLOR_DATA (another_a)((allocno_color_data_t) ((another_a)->add_data))->in_graph_p |
| 2451 | && !ALLOCNO_COLOR_DATA (another_a)((allocno_color_data_t) ((another_a)->add_data))->may_be_spilled_p) |
| 2452 | || ALLOCNO_COLOR_DATA (another_a)((allocno_color_data_t) ((another_a)->add_data))->colorable_p) |
| 2453 | sorted_copies[cp_num++] = cp; |
| 2454 | } |
| 2455 | form_threads_from_copies (cp_num); |
| 2456 | } |
| 2457 | |
| 2458 | /* Form initial threads which contain only one allocno. */ |
| 2459 | static void |
| 2460 | init_allocno_threads (void) |
| 2461 | { |
| 2462 | ira_allocno_t a; |
| 2463 | unsigned int j; |
| 2464 | bitmap_iterator bi; |
| 2465 | ira_pref_t pref; |
| 2466 | |
| 2467 | EXECUTE_IF_SET_IN_BITMAP (consideration_allocno_bitmap, 0, j, bi)for (bmp_iter_set_init (&(bi), (consideration_allocno_bitmap ), (0), &(j)); bmp_iter_set (&(bi), &(j)); bmp_iter_next (&(bi), &(j))) |
| 2468 | { |
| 2469 | a = ira_allocnos[j]; |
| 2470 | /* Set up initial thread data: */ |
| 2471 | ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->first_thread_allocno |
| 2472 | = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->next_thread_allocno = a; |
| 2473 | ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->thread_freq = ALLOCNO_FREQ (a)((a)->freq); |
| 2474 | ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->hard_reg_prefs = 0; |
| 2475 | for (pref = ALLOCNO_PREFS (a)((a)->allocno_prefs); pref != NULLnullptr; pref = pref->next_pref) |
| 2476 | ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->hard_reg_prefs += pref->freq; |
| 2477 | } |
| 2478 | } |
| 2479 | |
| 2480 | |
| 2481 | |
| 2482 | /* This page contains the allocator based on the Chaitin-Briggs algorithm. */ |
| 2483 | |
| 2484 | /* Bucket of allocnos that can colored currently without spilling. */ |
| 2485 | static ira_allocno_t colorable_allocno_bucket; |
| 2486 | |
| 2487 | /* Bucket of allocnos that might be not colored currently without |
| 2488 | spilling. */ |
| 2489 | static ira_allocno_t uncolorable_allocno_bucket; |
| 2490 | |
| 2491 | /* The current number of allocnos in the uncolorable_bucket. */ |
| 2492 | static int uncolorable_allocnos_num; |
| 2493 | |
| 2494 | /* Return the current spill priority of allocno A. The less the |
| 2495 | number, the more preferable the allocno for spilling. */ |
| 2496 | static inline int |
| 2497 | allocno_spill_priority (ira_allocno_t a) |
| 2498 | { |
| 2499 | allocno_color_data_t data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 2500 | |
| 2501 | return (data->temp |
| 2502 | / (ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (a)((a)->excess_pressure_points_num) |
| 2503 | * ira_reg_class_max_nregs(this_target_ira->x_ira_reg_class_max_nregs)[ALLOCNO_CLASS (a)((a)->aclass)][ALLOCNO_MODE (a)((a)->mode)] |
| 2504 | + 1)); |
| 2505 | } |
| 2506 | |
| 2507 | /* Add allocno A to bucket *BUCKET_PTR. A should be not in a bucket |
| 2508 | before the call. */ |
| 2509 | static void |
| 2510 | add_allocno_to_bucket (ira_allocno_t a, ira_allocno_t *bucket_ptr) |
| 2511 | { |
| 2512 | ira_allocno_t first_a; |
| 2513 | allocno_color_data_t data; |
| 2514 | |
| 2515 | if (bucket_ptr == &uncolorable_allocno_bucket |
| 2516 | && ALLOCNO_CLASS (a)((a)->aclass) != NO_REGS) |
| 2517 | { |
| 2518 | uncolorable_allocnos_num++; |
| 2519 | ira_assert (uncolorable_allocnos_num > 0)((void)(!(uncolorable_allocnos_num > 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2519, __FUNCTION__), 0 : 0)); |
| 2520 | } |
| 2521 | first_a = *bucket_ptr; |
| 2522 | data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 2523 | data->next_bucket_allocno = first_a; |
| 2524 | data->prev_bucket_allocno = NULLnullptr; |
| 2525 | if (first_a != NULLnullptr) |
| 2526 | ALLOCNO_COLOR_DATA (first_a)((allocno_color_data_t) ((first_a)->add_data))->prev_bucket_allocno = a; |
| 2527 | *bucket_ptr = a; |
| 2528 | } |
| 2529 | |
| 2530 | /* Compare two allocnos to define which allocno should be pushed first |
| 2531 | into the coloring stack. If the return is a negative number, the |
| 2532 | allocno given by the first parameter will be pushed first. In this |
| 2533 | case such allocno has less priority than the second one and the |
| 2534 | hard register will be assigned to it after assignment to the second |
| 2535 | one. As the result of such assignment order, the second allocno |
| 2536 | has a better chance to get the best hard register. */ |
| 2537 | static int |
| 2538 | bucket_allocno_compare_func (const void *v1p, const void *v2p) |
| 2539 | { |
| 2540 | ira_allocno_t a1 = *(const ira_allocno_t *) v1p; |
| 2541 | ira_allocno_t a2 = *(const ira_allocno_t *) v2p; |
| 2542 | int diff, freq1, freq2, a1_num, a2_num, pref1, pref2; |
| 2543 | ira_allocno_t t1 = ALLOCNO_COLOR_DATA (a1)((allocno_color_data_t) ((a1)->add_data))->first_thread_allocno; |
| 2544 | ira_allocno_t t2 = ALLOCNO_COLOR_DATA (a2)((allocno_color_data_t) ((a2)->add_data))->first_thread_allocno; |
| 2545 | int cl1 = ALLOCNO_CLASS (a1)((a1)->aclass), cl2 = ALLOCNO_CLASS (a2)((a2)->aclass); |
| 2546 | |
| 2547 | freq1 = ALLOCNO_COLOR_DATA (t1)((allocno_color_data_t) ((t1)->add_data))->thread_freq; |
| 2548 | freq2 = ALLOCNO_COLOR_DATA (t2)((allocno_color_data_t) ((t2)->add_data))->thread_freq; |
| 2549 | if ((diff = freq1 - freq2) != 0) |
| 2550 | return diff; |
| 2551 | |
| 2552 | if ((diff = ALLOCNO_NUM (t2)((t2)->num) - ALLOCNO_NUM (t1)((t1)->num)) != 0) |
| 2553 | return diff; |
| 2554 | |
| 2555 | /* Push pseudos requiring less hard registers first. It means that |
| 2556 | we will assign pseudos requiring more hard registers first |
| 2557 | avoiding creation small holes in free hard register file into |
| 2558 | which the pseudos requiring more hard registers cannot fit. */ |
| 2559 | if ((diff = (ira_reg_class_max_nregs(this_target_ira->x_ira_reg_class_max_nregs)[cl1][ALLOCNO_MODE (a1)((a1)->mode)] |
| 2560 | - ira_reg_class_max_nregs(this_target_ira->x_ira_reg_class_max_nregs)[cl2][ALLOCNO_MODE (a2)((a2)->mode)])) != 0) |
| 2561 | return diff; |
| 2562 | |
| 2563 | freq1 = ALLOCNO_FREQ (a1)((a1)->freq); |
| 2564 | freq2 = ALLOCNO_FREQ (a2)((a2)->freq); |
| 2565 | if ((diff = freq1 - freq2) != 0) |
| 2566 | return diff; |
| 2567 | |
| 2568 | a1_num = ALLOCNO_COLOR_DATA (a1)((allocno_color_data_t) ((a1)->add_data))->available_regs_num; |
| 2569 | a2_num = ALLOCNO_COLOR_DATA (a2)((allocno_color_data_t) ((a2)->add_data))->available_regs_num; |
| 2570 | if ((diff = a2_num - a1_num) != 0) |
| 2571 | return diff; |
| 2572 | /* Push allocnos with minimal conflict_allocno_hard_prefs first. */ |
| 2573 | pref1 = ALLOCNO_COLOR_DATA (a1)((allocno_color_data_t) ((a1)->add_data))->conflict_allocno_hard_prefs; |
| 2574 | pref2 = ALLOCNO_COLOR_DATA (a2)((allocno_color_data_t) ((a2)->add_data))->conflict_allocno_hard_prefs; |
| 2575 | if ((diff = pref1 - pref2) != 0) |
| 2576 | return diff; |
| 2577 | return ALLOCNO_NUM (a2)((a2)->num) - ALLOCNO_NUM (a1)((a1)->num); |
| 2578 | } |
| 2579 | |
| 2580 | /* Sort bucket *BUCKET_PTR and return the result through |
| 2581 | BUCKET_PTR. */ |
| 2582 | static void |
| 2583 | sort_bucket (ira_allocno_t *bucket_ptr, |
| 2584 | int (*compare_func) (const void *, const void *)) |
| 2585 | { |
| 2586 | ira_allocno_t a, head; |
| 2587 | int n; |
| 2588 | |
| 2589 | for (n = 0, a = *bucket_ptr; |
| 2590 | a != NULLnullptr; |
| 2591 | a = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->next_bucket_allocno) |
| 2592 | sorted_allocnos[n++] = a; |
| 2593 | if (n <= 1) |
| 2594 | return; |
| 2595 | qsort (sorted_allocnos, n, sizeof (ira_allocno_t), compare_func)gcc_qsort (sorted_allocnos, n, sizeof (ira_allocno_t), compare_func ); |
| 2596 | head = NULLnullptr; |
| 2597 | for (n--; n >= 0; n--) |
| 2598 | { |
| 2599 | a = sorted_allocnos[n]; |
| 2600 | ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->next_bucket_allocno = head; |
| 2601 | ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->prev_bucket_allocno = NULLnullptr; |
| 2602 | if (head != NULLnullptr) |
| 2603 | ALLOCNO_COLOR_DATA (head)((allocno_color_data_t) ((head)->add_data))->prev_bucket_allocno = a; |
| 2604 | head = a; |
| 2605 | } |
| 2606 | *bucket_ptr = head; |
| 2607 | } |
| 2608 | |
| 2609 | /* Add ALLOCNO to colorable bucket maintaining the order according |
| 2610 | their priority. ALLOCNO should be not in a bucket before the |
| 2611 | call. */ |
| 2612 | static void |
| 2613 | add_allocno_to_ordered_colorable_bucket (ira_allocno_t allocno) |
| 2614 | { |
| 2615 | ira_allocno_t before, after; |
| 2616 | |
| 2617 | form_threads_from_colorable_allocno (allocno); |
| 2618 | for (before = colorable_allocno_bucket, after = NULLnullptr; |
| 2619 | before != NULLnullptr; |
| 2620 | after = before, |
| 2621 | before = ALLOCNO_COLOR_DATA (before)((allocno_color_data_t) ((before)->add_data))->next_bucket_allocno) |
| 2622 | if (bucket_allocno_compare_func (&allocno, &before) < 0) |
| 2623 | break; |
| 2624 | ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->next_bucket_allocno = before; |
| 2625 | ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->prev_bucket_allocno = after; |
| 2626 | if (after == NULLnullptr) |
| 2627 | colorable_allocno_bucket = allocno; |
| 2628 | else |
| 2629 | ALLOCNO_COLOR_DATA (after)((allocno_color_data_t) ((after)->add_data))->next_bucket_allocno = allocno; |
| 2630 | if (before != NULLnullptr) |
| 2631 | ALLOCNO_COLOR_DATA (before)((allocno_color_data_t) ((before)->add_data))->prev_bucket_allocno = allocno; |
| 2632 | } |
| 2633 | |
| 2634 | /* Delete ALLOCNO from bucket *BUCKET_PTR. It should be there before |
| 2635 | the call. */ |
| 2636 | static void |
| 2637 | delete_allocno_from_bucket (ira_allocno_t allocno, ira_allocno_t *bucket_ptr) |
| 2638 | { |
| 2639 | ira_allocno_t prev_allocno, next_allocno; |
| 2640 | |
| 2641 | if (bucket_ptr == &uncolorable_allocno_bucket |
| 2642 | && ALLOCNO_CLASS (allocno)((allocno)->aclass) != NO_REGS) |
| 2643 | { |
| 2644 | uncolorable_allocnos_num--; |
| 2645 | ira_assert (uncolorable_allocnos_num >= 0)((void)(!(uncolorable_allocnos_num >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2645, __FUNCTION__), 0 : 0)); |
| 2646 | } |
| 2647 | prev_allocno = ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->prev_bucket_allocno; |
| 2648 | next_allocno = ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->next_bucket_allocno; |
| 2649 | if (prev_allocno != NULLnullptr) |
| 2650 | ALLOCNO_COLOR_DATA (prev_allocno)((allocno_color_data_t) ((prev_allocno)->add_data))->next_bucket_allocno = next_allocno; |
| 2651 | else |
| 2652 | { |
| 2653 | ira_assert (*bucket_ptr == allocno)((void)(!(*bucket_ptr == allocno) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2653, __FUNCTION__), 0 : 0)); |
| 2654 | *bucket_ptr = next_allocno; |
| 2655 | } |
| 2656 | if (next_allocno != NULLnullptr) |
| 2657 | ALLOCNO_COLOR_DATA (next_allocno)((allocno_color_data_t) ((next_allocno)->add_data))->prev_bucket_allocno = prev_allocno; |
| 2658 | } |
| 2659 | |
| 2660 | /* Put allocno A onto the coloring stack without removing it from its |
| 2661 | bucket. Pushing allocno to the coloring stack can result in moving |
| 2662 | conflicting allocnos from the uncolorable bucket to the colorable |
| 2663 | one. Update conflict_allocno_hard_prefs of the conflicting |
| 2664 | allocnos which are not on stack yet. */ |
| 2665 | static void |
| 2666 | push_allocno_to_stack (ira_allocno_t a) |
| 2667 | { |
| 2668 | enum reg_class aclass; |
| 2669 | allocno_color_data_t data, conflict_data; |
| 2670 | int size, i, n = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 2671 | |
| 2672 | data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 2673 | data->in_graph_p = false; |
| 2674 | allocno_stack_vec.safe_push (a); |
| 2675 | aclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 2676 | if (aclass == NO_REGS) |
| 2677 | return; |
| 2678 | size = ira_reg_class_max_nregs(this_target_ira->x_ira_reg_class_max_nregs)[aclass][ALLOCNO_MODE (a)((a)->mode)]; |
| 2679 | if (n > 1) |
| 2680 | { |
| 2681 | /* We will deal with the subwords individually. */ |
| 2682 | gcc_assert (size == ALLOCNO_NUM_OBJECTS (a))((void)(!(size == ((a)->num_objects)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2682, __FUNCTION__), 0 : 0)); |
| 2683 | size = 1; |
| 2684 | } |
| 2685 | for (i = 0; i < n; i++) |
| 2686 | { |
| 2687 | ira_object_t obj = ALLOCNO_OBJECT (a, i)((a)->objects[i]); |
| 2688 | ira_object_t conflict_obj; |
| 2689 | ira_object_conflict_iterator oci; |
| 2690 | |
| 2691 | FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)for (ira_object_conflict_iter_init (&(oci), (obj)); ira_object_conflict_iter_cond (&(oci), &(conflict_obj));) |
| 2692 | { |
| 2693 | ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj)((conflict_obj)->allocno); |
| 2694 | ira_pref_t pref; |
| 2695 | |
| 2696 | conflict_data = ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data)); |
| 2697 | if (! conflict_data->in_graph_p |
| 2698 | || ALLOCNO_ASSIGNED_P (conflict_a)((conflict_a)->assigned_p) |
| 2699 | || !(hard_reg_set_intersect_p |
| 2700 | (ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->profitable_hard_regs, |
| 2701 | conflict_data->profitable_hard_regs))) |
| 2702 | continue; |
| 2703 | for (pref = ALLOCNO_PREFS (a)((a)->allocno_prefs); pref != NULLnullptr; pref = pref->next_pref) |
| 2704 | conflict_data->conflict_allocno_hard_prefs -= pref->freq; |
| 2705 | if (conflict_data->colorable_p) |
| 2706 | continue; |
| 2707 | ira_assert (bitmap_bit_p (coloring_allocno_bitmap,((void)(!(bitmap_bit_p (coloring_allocno_bitmap, ((conflict_a )->num))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2708, __FUNCTION__), 0 : 0)) |
| 2708 | ALLOCNO_NUM (conflict_a)))((void)(!(bitmap_bit_p (coloring_allocno_bitmap, ((conflict_a )->num))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2708, __FUNCTION__), 0 : 0)); |
| 2709 | if (update_left_conflict_sizes_p (conflict_a, a, size)) |
| 2710 | { |
| 2711 | delete_allocno_from_bucket |
| 2712 | (conflict_a, &uncolorable_allocno_bucket); |
| 2713 | add_allocno_to_ordered_colorable_bucket (conflict_a); |
| 2714 | if (internal_flag_ira_verbose > 4 && ira_dump_file != NULLnullptr) |
| 2715 | { |
| 2716 | fprintf (ira_dump_file, " Making"); |
| 2717 | ira_print_expanded_allocno (conflict_a); |
| 2718 | fprintf (ira_dump_file, " colorable\n"); |
| 2719 | } |
| 2720 | } |
| 2721 | |
| 2722 | } |
| 2723 | } |
| 2724 | } |
| 2725 | |
| 2726 | /* Put ALLOCNO onto the coloring stack and remove it from its bucket. |
| 2727 | The allocno is in the colorable bucket if COLORABLE_P is TRUE. */ |
| 2728 | static void |
| 2729 | remove_allocno_from_bucket_and_push (ira_allocno_t allocno, bool colorable_p) |
| 2730 | { |
| 2731 | if (colorable_p) |
| 2732 | delete_allocno_from_bucket (allocno, &colorable_allocno_bucket); |
| 2733 | else |
| 2734 | delete_allocno_from_bucket (allocno, &uncolorable_allocno_bucket); |
| 2735 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 2736 | { |
| 2737 | fprintf (ira_dump_file, " Pushing"); |
| 2738 | ira_print_expanded_allocno (allocno); |
| 2739 | if (colorable_p) |
| 2740 | fprintf (ira_dump_file, "(cost %d)\n", |
| 2741 | ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->temp); |
| 2742 | else |
| 2743 | fprintf (ira_dump_file, "(potential spill: %spri=%d, cost=%d)\n", |
| 2744 | ALLOCNO_BAD_SPILL_P (allocno)((allocno)->bad_spill_p) ? "bad spill, " : "", |
| 2745 | allocno_spill_priority (allocno), |
| 2746 | ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->temp); |
| 2747 | } |
| 2748 | if (! colorable_p) |
| 2749 | ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->may_be_spilled_p = true; |
| 2750 | push_allocno_to_stack (allocno); |
| 2751 | } |
| 2752 | |
| 2753 | /* Put all allocnos from colorable bucket onto the coloring stack. */ |
| 2754 | static void |
| 2755 | push_only_colorable (void) |
| 2756 | { |
| 2757 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 2758 | fprintf (ira_dump_file, " Forming thread from colorable bucket:\n"); |
| 2759 | form_threads_from_bucket (colorable_allocno_bucket); |
| 2760 | for (ira_allocno_t a = colorable_allocno_bucket; |
| 2761 | a != NULLnullptr; |
| 2762 | a = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->next_bucket_allocno) |
| 2763 | update_costs_from_prefs (a); |
| 2764 | sort_bucket (&colorable_allocno_bucket, bucket_allocno_compare_func); |
| 2765 | for (;colorable_allocno_bucket != NULLnullptr;) |
| 2766 | remove_allocno_from_bucket_and_push (colorable_allocno_bucket, true); |
| 2767 | } |
| 2768 | |
| 2769 | /* Return the frequency of exit edges (if EXIT_P) or entry from/to the |
| 2770 | loop given by its LOOP_NODE. */ |
| 2771 | int |
| 2772 | ira_loop_edge_freq (ira_loop_tree_node_t loop_node, int regno, bool exit_p) |
| 2773 | { |
| 2774 | int freq, i; |
| 2775 | edge_iterator ei; |
| 2776 | edge e; |
| 2777 | |
| 2778 | ira_assert (current_loops != NULL && loop_node->loop != NULL((void)(!(((cfun + 0)->x_current_loops) != nullptr && loop_node->loop != nullptr && (regno < 0 || regno >= 76)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2779, __FUNCTION__), 0 : 0)) |
| 2779 | && (regno < 0 || regno >= FIRST_PSEUDO_REGISTER))((void)(!(((cfun + 0)->x_current_loops) != nullptr && loop_node->loop != nullptr && (regno < 0 || regno >= 76)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2779, __FUNCTION__), 0 : 0)); |
| 2780 | freq = 0; |
| 2781 | if (! exit_p) |
| 2782 | { |
| 2783 | FOR_EACH_EDGE (e, ei, loop_node->loop->header->preds)for ((ei) = ei_start_1 (&((loop_node->loop->header-> preds))); ei_cond ((ei), &(e)); ei_next (&(ei))) |
| 2784 | if (e->src != loop_node->loop->latch |
| 2785 | && (regno < 0 |
| 2786 | || (bitmap_bit_p (df_get_live_out (e->src), regno) |
| 2787 | && bitmap_bit_p (df_get_live_in (e->dest), regno)))) |
| 2788 | freq += EDGE_FREQUENCY (e)e->count ().to_frequency ((cfun + 0)); |
| 2789 | } |
| 2790 | else |
| 2791 | { |
| 2792 | auto_vec<edge> edges = get_loop_exit_edges (loop_node->loop); |
| 2793 | FOR_EACH_VEC_ELT (edges, i, e)for (i = 0; (edges).iterate ((i), &(e)); ++(i)) |
| 2794 | if (regno < 0 |
| 2795 | || (bitmap_bit_p (df_get_live_out (e->src), regno) |
| 2796 | && bitmap_bit_p (df_get_live_in (e->dest), regno))) |
| 2797 | freq += EDGE_FREQUENCY (e)e->count ().to_frequency ((cfun + 0)); |
| 2798 | } |
| 2799 | |
| 2800 | return REG_FREQ_FROM_EDGE_FREQ (freq)(optimize_function_for_size_p ((cfun + 0)) ? 1000 : (freq * 1000 / 10000) ? (freq * 1000 / 10000) : 1); |
| 2801 | } |
| 2802 | |
| 2803 | /* Construct an object that describes the boundary between A and its |
| 2804 | parent allocno. */ |
| 2805 | ira_loop_border_costs::ira_loop_border_costs (ira_allocno_t a) |
| 2806 | : m_mode (ALLOCNO_MODE (a)((a)->mode)), |
| 2807 | m_class (ALLOCNO_CLASS (a)((a)->aclass)), |
| 2808 | m_entry_freq (ira_loop_edge_freq (ALLOCNO_LOOP_TREE_NODE (a)((a)->loop_tree_node), |
| 2809 | ALLOCNO_REGNO (a)((a)->regno), false)), |
| 2810 | m_exit_freq (ira_loop_edge_freq (ALLOCNO_LOOP_TREE_NODE (a)((a)->loop_tree_node), |
| 2811 | ALLOCNO_REGNO (a)((a)->regno), true)) |
| 2812 | { |
| 2813 | } |
| 2814 | |
| 2815 | /* Calculate and return the cost of putting allocno A into memory. */ |
| 2816 | static int |
| 2817 | calculate_allocno_spill_cost (ira_allocno_t a) |
| 2818 | { |
| 2819 | int regno, cost; |
| 2820 | ira_allocno_t parent_allocno; |
| 2821 | ira_loop_tree_node_t parent_node, loop_node; |
| 2822 | |
| 2823 | regno = ALLOCNO_REGNO (a)((a)->regno); |
| 2824 | cost = ALLOCNO_UPDATED_MEMORY_COST (a)((a)->updated_memory_cost) - ALLOCNO_UPDATED_CLASS_COST (a)((a)->updated_class_cost); |
| 2825 | if (ALLOCNO_CAP (a)((a)->cap) != NULLnullptr) |
| 2826 | return cost; |
| 2827 | loop_node = ALLOCNO_LOOP_TREE_NODE (a)((a)->loop_tree_node); |
| 2828 | if ((parent_node = loop_node->parent) == NULLnullptr) |
| 2829 | return cost; |
| 2830 | if ((parent_allocno = parent_node->regno_allocno_map[regno]) == NULLnullptr) |
| 2831 | return cost; |
| 2832 | ira_loop_border_costs border_costs (a); |
| 2833 | if (ALLOCNO_HARD_REGNO (parent_allocno)((parent_allocno)->hard_regno) < 0) |
| 2834 | cost -= border_costs.spill_outside_loop_cost (); |
| 2835 | else |
| 2836 | cost += (border_costs.spill_inside_loop_cost () |
| 2837 | - border_costs.move_between_loops_cost ()); |
| 2838 | return cost; |
| 2839 | } |
| 2840 | |
| 2841 | /* Used for sorting allocnos for spilling. */ |
| 2842 | static inline int |
| 2843 | allocno_spill_priority_compare (ira_allocno_t a1, ira_allocno_t a2) |
| 2844 | { |
| 2845 | int pri1, pri2, diff; |
| 2846 | |
| 2847 | /* Avoid spilling static chain pointer pseudo when non-local goto is |
| 2848 | used. */ |
| 2849 | if (non_spilled_static_chain_regno_p (ALLOCNO_REGNO (a1)((a1)->regno))) |
| 2850 | return 1; |
| 2851 | else if (non_spilled_static_chain_regno_p (ALLOCNO_REGNO (a2)((a2)->regno))) |
| 2852 | return -1; |
| 2853 | if (ALLOCNO_BAD_SPILL_P (a1)((a1)->bad_spill_p) && ! ALLOCNO_BAD_SPILL_P (a2)((a2)->bad_spill_p)) |
| 2854 | return 1; |
| 2855 | if (ALLOCNO_BAD_SPILL_P (a2)((a2)->bad_spill_p) && ! ALLOCNO_BAD_SPILL_P (a1)((a1)->bad_spill_p)) |
| 2856 | return -1; |
| 2857 | pri1 = allocno_spill_priority (a1); |
| 2858 | pri2 = allocno_spill_priority (a2); |
| 2859 | if ((diff = pri1 - pri2) != 0) |
| 2860 | return diff; |
| 2861 | if ((diff |
| 2862 | = ALLOCNO_COLOR_DATA (a1)((allocno_color_data_t) ((a1)->add_data))->temp - ALLOCNO_COLOR_DATA (a2)((allocno_color_data_t) ((a2)->add_data))->temp) != 0) |
| 2863 | return diff; |
| 2864 | return ALLOCNO_NUM (a1)((a1)->num) - ALLOCNO_NUM (a2)((a2)->num); |
| 2865 | } |
| 2866 | |
| 2867 | /* Used for sorting allocnos for spilling. */ |
| 2868 | static int |
| 2869 | allocno_spill_sort_compare (const void *v1p, const void *v2p) |
| 2870 | { |
| 2871 | ira_allocno_t p1 = *(const ira_allocno_t *) v1p; |
| 2872 | ira_allocno_t p2 = *(const ira_allocno_t *) v2p; |
| 2873 | |
| 2874 | return allocno_spill_priority_compare (p1, p2); |
| 2875 | } |
| 2876 | |
| 2877 | /* Push allocnos to the coloring stack. The order of allocnos in the |
| 2878 | stack defines the order for the subsequent coloring. */ |
| 2879 | static void |
| 2880 | push_allocnos_to_stack (void) |
| 2881 | { |
| 2882 | ira_allocno_t a; |
| 2883 | int cost; |
| 2884 | |
| 2885 | /* Calculate uncolorable allocno spill costs. */ |
| 2886 | for (a = uncolorable_allocno_bucket; |
| 2887 | a != NULLnullptr; |
| 2888 | a = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->next_bucket_allocno) |
| 2889 | if (ALLOCNO_CLASS (a)((a)->aclass) != NO_REGS) |
| 2890 | { |
| 2891 | cost = calculate_allocno_spill_cost (a); |
| 2892 | /* ??? Remove cost of copies between the coalesced |
| 2893 | allocnos. */ |
| 2894 | ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->temp = cost; |
| 2895 | } |
| 2896 | sort_bucket (&uncolorable_allocno_bucket, allocno_spill_sort_compare); |
| 2897 | for (;;) |
| 2898 | { |
| 2899 | push_only_colorable (); |
| 2900 | a = uncolorable_allocno_bucket; |
| 2901 | if (a == NULLnullptr) |
| 2902 | break; |
| 2903 | remove_allocno_from_bucket_and_push (a, false); |
| 2904 | } |
| 2905 | ira_assert (colorable_allocno_bucket == NULL((void)(!(colorable_allocno_bucket == nullptr && uncolorable_allocno_bucket == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2906, __FUNCTION__), 0 : 0)) |
| 2906 | && uncolorable_allocno_bucket == NULL)((void)(!(colorable_allocno_bucket == nullptr && uncolorable_allocno_bucket == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2906, __FUNCTION__), 0 : 0)); |
| 2907 | ira_assert (uncolorable_allocnos_num == 0)((void)(!(uncolorable_allocnos_num == 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2907, __FUNCTION__), 0 : 0)); |
| 2908 | } |
| 2909 | |
| 2910 | /* Pop the coloring stack and assign hard registers to the popped |
| 2911 | allocnos. */ |
| 2912 | static void |
| 2913 | pop_allocnos_from_stack (void) |
| 2914 | { |
| 2915 | ira_allocno_t allocno; |
| 2916 | enum reg_class aclass; |
| 2917 | |
| 2918 | for (;allocno_stack_vec.length () != 0;) |
| 2919 | { |
| 2920 | allocno = allocno_stack_vec.pop (); |
| 2921 | aclass = ALLOCNO_CLASS (allocno)((allocno)->aclass); |
| 2922 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 2923 | { |
| 2924 | fprintf (ira_dump_file, " Popping"); |
| 2925 | ira_print_expanded_allocno (allocno); |
| 2926 | fprintf (ira_dump_file, " -- "); |
| 2927 | } |
| 2928 | if (aclass == NO_REGS) |
| 2929 | { |
| 2930 | ALLOCNO_HARD_REGNO (allocno)((allocno)->hard_regno) = -1; |
| 2931 | ALLOCNO_ASSIGNED_P (allocno)((allocno)->assigned_p) = true; |
| 2932 | ira_assert (ALLOCNO_UPDATED_HARD_REG_COSTS (allocno) == NULL)((void)(!(((allocno)->updated_hard_reg_costs) == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2932, __FUNCTION__), 0 : 0)); |
| 2933 | ira_assert((void)(!(((allocno)->updated_conflict_hard_reg_costs) == nullptr ) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2934, __FUNCTION__), 0 : 0)) |
| 2934 | (ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (allocno) == NULL)((void)(!(((allocno)->updated_conflict_hard_reg_costs) == nullptr ) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 2934, __FUNCTION__), 0 : 0)); |
| 2935 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 2936 | fprintf (ira_dump_file, "assign memory\n"); |
| 2937 | } |
| 2938 | else if (assign_hard_reg (allocno, false)) |
| 2939 | { |
| 2940 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 2941 | fprintf (ira_dump_file, " assign reg %d\n", |
| 2942 | ALLOCNO_HARD_REGNO (allocno)((allocno)->hard_regno)); |
| 2943 | } |
| 2944 | else if (ALLOCNO_ASSIGNED_P (allocno)((allocno)->assigned_p)) |
| 2945 | { |
| 2946 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 2947 | fprintf (ira_dump_file, "spill%s\n", |
| 2948 | ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->may_be_spilled_p |
| 2949 | ? "" : "!"); |
| 2950 | } |
| 2951 | ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->in_graph_p = true; |
| 2952 | } |
| 2953 | } |
| 2954 | |
| 2955 | /* Set up number of available hard registers for allocno A. */ |
| 2956 | static void |
| 2957 | setup_allocno_available_regs_num (ira_allocno_t a) |
| 2958 | { |
| 2959 | int i, n, hard_regno, hard_regs_num, nwords; |
| 2960 | enum reg_class aclass; |
| 2961 | allocno_color_data_t data; |
| 2962 | |
| 2963 | aclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 2964 | data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 2965 | data->available_regs_num = 0; |
| 2966 | if (aclass == NO_REGS) |
| 2967 | return; |
| 2968 | hard_regs_num = ira_class_hard_regs_num(this_target_ira->x_ira_class_hard_regs_num)[aclass]; |
| 2969 | nwords = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 2970 | for (n = 0, i = hard_regs_num - 1; i >= 0; i--) |
| 2971 | { |
| 2972 | hard_regno = ira_class_hard_regs(this_target_ira->x_ira_class_hard_regs)[aclass][i]; |
| 2973 | /* Checking only profitable hard regs. */ |
| 2974 | if (TEST_HARD_REG_BIT (data->profitable_hard_regs, hard_regno)) |
| 2975 | n++; |
| 2976 | } |
| 2977 | data->available_regs_num = n; |
| 2978 | if (internal_flag_ira_verbose <= 2 || ira_dump_file == NULLnullptr) |
| 2979 | return; |
| 2980 | fprintf |
| 2981 | (ira_dump_file, |
| 2982 | " Allocno a%dr%d of %s(%d) has %d avail. regs ", |
| 2983 | ALLOCNO_NUM (a)((a)->num), ALLOCNO_REGNO (a)((a)->regno), |
| 2984 | reg_class_names[aclass], ira_class_hard_regs_num(this_target_ira->x_ira_class_hard_regs_num)[aclass], n); |
| 2985 | print_hard_reg_set (ira_dump_file, data->profitable_hard_regs, false); |
| 2986 | fprintf (ira_dump_file, ", %snode: ", |
| 2987 | data->profitable_hard_regs == data->hard_regs_node->hard_regs->set |
| 2988 | ? "" : "^"); |
| 2989 | print_hard_reg_set (ira_dump_file, |
| 2990 | data->hard_regs_node->hard_regs->set, false); |
| 2991 | for (i = 0; i < nwords; i++) |
| 2992 | { |
| 2993 | ira_object_t obj = ALLOCNO_OBJECT (a, i)((a)->objects[i]); |
| 2994 | |
| 2995 | if (nwords != 1) |
| 2996 | { |
| 2997 | if (i != 0) |
| 2998 | fprintf (ira_dump_file, ", "); |
| 2999 | fprintf (ira_dump_file, " obj %d", i); |
| 3000 | } |
| 3001 | fprintf (ira_dump_file, " (confl regs = "); |
| 3002 | print_hard_reg_set (ira_dump_file, OBJECT_TOTAL_CONFLICT_HARD_REGS (obj)((obj)->total_conflict_hard_regs), |
| 3003 | false); |
| 3004 | fprintf (ira_dump_file, ")"); |
| 3005 | } |
| 3006 | fprintf (ira_dump_file, "\n"); |
| 3007 | } |
| 3008 | |
| 3009 | /* Put ALLOCNO in a bucket corresponding to its number and size of its |
| 3010 | conflicting allocnos and hard registers. */ |
| 3011 | static void |
| 3012 | put_allocno_into_bucket (ira_allocno_t allocno) |
| 3013 | { |
| 3014 | ALLOCNO_COLOR_DATA (allocno)((allocno_color_data_t) ((allocno)->add_data))->in_graph_p = true; |
| 3015 | setup_allocno_available_regs_num (allocno); |
| 3016 | if (setup_left_conflict_sizes_p (allocno)) |
| 3017 | add_allocno_to_bucket (allocno, &colorable_allocno_bucket); |
| 3018 | else |
| 3019 | add_allocno_to_bucket (allocno, &uncolorable_allocno_bucket); |
| 3020 | } |
| 3021 | |
| 3022 | /* Map: allocno number -> allocno priority. */ |
| 3023 | static int *allocno_priorities; |
| 3024 | |
| 3025 | /* Set up priorities for N allocnos in array |
| 3026 | CONSIDERATION_ALLOCNOS. */ |
| 3027 | static void |
| 3028 | setup_allocno_priorities (ira_allocno_t *consideration_allocnos, int n) |
| 3029 | { |
| 3030 | int i, length, nrefs, priority, max_priority, mult, diff; |
| 3031 | ira_allocno_t a; |
| 3032 | |
| 3033 | max_priority = 0; |
| 3034 | for (i = 0; i < n; i++) |
| 3035 | { |
| 3036 | a = consideration_allocnos[i]; |
| 3037 | nrefs = ALLOCNO_NREFS (a)((a)->nrefs); |
| 3038 | ira_assert (nrefs >= 0)((void)(!(nrefs >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3038, __FUNCTION__), 0 : 0)); |
| 3039 | mult = floor_log2 (ALLOCNO_NREFS (a)((a)->nrefs)) + 1; |
| 3040 | ira_assert (mult >= 0)((void)(!(mult >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3040, __FUNCTION__), 0 : 0)); |
| 3041 | mult *= ira_reg_class_max_nregs(this_target_ira->x_ira_reg_class_max_nregs)[ALLOCNO_CLASS (a)((a)->aclass)][ALLOCNO_MODE (a)((a)->mode)]; |
| 3042 | diff = ALLOCNO_MEMORY_COST (a)((a)->memory_cost) - ALLOCNO_CLASS_COST (a)((a)->class_cost); |
| 3043 | #ifdef __has_builtin |
| 3044 | #if0 __has_builtin(__builtin_smul_overflow)1 |
| 3045 | #define HAS_SMUL_OVERFLOW |
| 3046 | #endif |
| 3047 | #endif |
| 3048 | /* Multiplication can overflow for very large functions. |
| 3049 | Check the overflow and constrain the result if necessary: */ |
| 3050 | #ifdef HAS_SMUL_OVERFLOW |
| 3051 | if (__builtin_smul_overflow (mult, diff, &priority) |
| 3052 | || priority < -INT_MAX2147483647) |
| 3053 | priority = diff >= 0 ? INT_MAX2147483647 : -INT_MAX2147483647; |
| 3054 | #else |
| 3055 | static_assert |
| 3056 | (sizeof (long long) >= 2 * sizeof (int), |
| 3057 | "overflow code does not work for such int and long long sizes"); |
| 3058 | long long priorityll = (long long) mult * diff; |
| 3059 | if (priorityll < -INT_MAX2147483647 || priorityll > INT_MAX2147483647) |
| 3060 | priority = diff >= 0 ? INT_MAX2147483647 : -INT_MAX2147483647; |
| 3061 | else |
| 3062 | priority = priorityll; |
| 3063 | #endif |
| 3064 | allocno_priorities[ALLOCNO_NUM (a)((a)->num)] = priority; |
| 3065 | if (priority < 0) |
| 3066 | priority = -priority; |
| 3067 | if (max_priority < priority) |
| 3068 | max_priority = priority; |
| 3069 | } |
| 3070 | mult = max_priority == 0 ? 1 : INT_MAX2147483647 / max_priority; |
| 3071 | for (i = 0; i < n; i++) |
| 3072 | { |
| 3073 | a = consideration_allocnos[i]; |
| 3074 | length = ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (a)((a)->excess_pressure_points_num); |
| 3075 | if (ALLOCNO_NUM_OBJECTS (a)((a)->num_objects) > 1) |
| 3076 | length /= ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 3077 | if (length <= 0) |
| 3078 | length = 1; |
| 3079 | allocno_priorities[ALLOCNO_NUM (a)((a)->num)] |
| 3080 | = allocno_priorities[ALLOCNO_NUM (a)((a)->num)] * mult / length; |
| 3081 | } |
| 3082 | } |
| 3083 | |
| 3084 | /* Sort allocnos according to the profit of usage of a hard register |
| 3085 | instead of memory for them. */ |
| 3086 | static int |
| 3087 | allocno_cost_compare_func (const void *v1p, const void *v2p) |
| 3088 | { |
| 3089 | ira_allocno_t p1 = *(const ira_allocno_t *) v1p; |
| 3090 | ira_allocno_t p2 = *(const ira_allocno_t *) v2p; |
| 3091 | int c1, c2; |
| 3092 | |
| 3093 | c1 = ALLOCNO_UPDATED_MEMORY_COST (p1)((p1)->updated_memory_cost) - ALLOCNO_UPDATED_CLASS_COST (p1)((p1)->updated_class_cost); |
| 3094 | c2 = ALLOCNO_UPDATED_MEMORY_COST (p2)((p2)->updated_memory_cost) - ALLOCNO_UPDATED_CLASS_COST (p2)((p2)->updated_class_cost); |
| 3095 | if (c1 - c2) |
| 3096 | return c1 - c2; |
| 3097 | |
| 3098 | /* If regs are equally good, sort by allocno numbers, so that the |
| 3099 | results of qsort leave nothing to chance. */ |
| 3100 | return ALLOCNO_NUM (p1)((p1)->num) - ALLOCNO_NUM (p2)((p2)->num); |
| 3101 | } |
| 3102 | |
| 3103 | /* Return savings on removed copies when ALLOCNO is assigned to |
| 3104 | HARD_REGNO. */ |
| 3105 | static int |
| 3106 | allocno_copy_cost_saving (ira_allocno_t allocno, int hard_regno) |
| 3107 | { |
| 3108 | int cost = 0; |
| 3109 | machine_mode allocno_mode = ALLOCNO_MODE (allocno)((allocno)->mode); |
| 3110 | enum reg_class rclass; |
| 3111 | ira_copy_t cp, next_cp; |
| 3112 | |
| 3113 | rclass = REGNO_REG_CLASS (hard_regno)(regclass_map[(hard_regno)]); |
| 3114 | if (ira_reg_class_max_nregs(this_target_ira->x_ira_reg_class_max_nregs)[rclass][allocno_mode] |
| 3115 | > ira_class_hard_regs_num(this_target_ira->x_ira_class_hard_regs_num)[rclass]) |
| 3116 | /* For the above condition the cost can be wrong. Use the allocno |
| 3117 | class in this case. */ |
| 3118 | rclass = ALLOCNO_CLASS (allocno)((allocno)->aclass); |
| 3119 | for (cp = ALLOCNO_COPIES (allocno)((allocno)->allocno_copies); cp != NULLnullptr; cp = next_cp) |
| 3120 | { |
| 3121 | if (cp->first == allocno) |
| 3122 | { |
| 3123 | next_cp = cp->next_first_allocno_copy; |
| 3124 | if (ALLOCNO_HARD_REGNO (cp->second)((cp->second)->hard_regno) != hard_regno) |
| 3125 | continue; |
| 3126 | } |
| 3127 | else if (cp->second == allocno) |
| 3128 | { |
| 3129 | next_cp = cp->next_second_allocno_copy; |
| 3130 | if (ALLOCNO_HARD_REGNO (cp->first)((cp->first)->hard_regno) != hard_regno) |
| 3131 | continue; |
| 3132 | } |
| 3133 | else |
| 3134 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3134, __FUNCTION__)); |
| 3135 | ira_init_register_move_cost_if_necessary (allocno_mode); |
| 3136 | cost += cp->freq * ira_register_move_cost(this_target_ira_int->x_ira_register_move_cost)[allocno_mode][rclass][rclass]; |
| 3137 | } |
| 3138 | return cost; |
| 3139 | } |
| 3140 | |
| 3141 | /* We used Chaitin-Briggs coloring to assign as many pseudos as |
| 3142 | possible to hard registers. Let us try to improve allocation with |
| 3143 | cost point of view. This function improves the allocation by |
| 3144 | spilling some allocnos and assigning the freed hard registers to |
| 3145 | other allocnos if it decreases the overall allocation cost. */ |
| 3146 | static void |
| 3147 | improve_allocation (void) |
| 3148 | { |
| 3149 | unsigned int i; |
| 3150 | int j, k, n, hregno, conflict_hregno, base_cost, class_size, word, nwords; |
| 3151 | int check, spill_cost, min_cost, nregs, conflict_nregs, r, best; |
| 3152 | bool try_p; |
| 3153 | enum reg_class aclass; |
| 3154 | machine_mode mode; |
| 3155 | int *allocno_costs; |
| 3156 | int costs[FIRST_PSEUDO_REGISTER76]; |
| 3157 | HARD_REG_SET conflicting_regs[2], profitable_hard_regs; |
| 3158 | ira_allocno_t a; |
| 3159 | bitmap_iterator bi; |
| 3160 | |
| 3161 | /* Don't bother to optimize the code with static chain pointer and |
| 3162 | non-local goto in order not to spill the chain pointer |
| 3163 | pseudo. */ |
| 3164 | if (cfun(cfun + 0)->static_chain_decl && crtl(&x_rtl)->has_nonlocal_goto) |
| 3165 | return; |
| 3166 | /* Clear counts used to process conflicting allocnos only once for |
| 3167 | each allocno. */ |
| 3168 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 3169 | ALLOCNO_COLOR_DATA (ira_allocnos[i])((allocno_color_data_t) ((ira_allocnos[i])->add_data))->temp = 0; |
| 3170 | check = n = 0; |
| 3171 | /* Process each allocno and try to assign a hard register to it by |
| 3172 | spilling some its conflicting allocnos. */ |
| 3173 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 3174 | { |
| 3175 | a = ira_allocnos[i]; |
| 3176 | ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->temp = 0; |
| 3177 | if (empty_profitable_hard_regs (a)) |
| 3178 | continue; |
| 3179 | check++; |
| 3180 | aclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 3181 | allocno_costs = ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs); |
| 3182 | if ((hregno = ALLOCNO_HARD_REGNO (a)((a)->hard_regno)) < 0) |
| 3183 | base_cost = ALLOCNO_UPDATED_MEMORY_COST (a)((a)->updated_memory_cost); |
| 3184 | else if (allocno_costs == NULLnullptr) |
| 3185 | /* It means that assigning a hard register is not profitable |
| 3186 | (we don't waste memory for hard register costs in this |
| 3187 | case). */ |
| 3188 | continue; |
| 3189 | else |
| 3190 | base_cost = (allocno_costs[ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[aclass][hregno]] |
| 3191 | - allocno_copy_cost_saving (a, hregno)); |
| 3192 | try_p = false; |
| 3193 | get_conflict_and_start_profitable_regs (a, false, |
| 3194 | conflicting_regs, |
| 3195 | &profitable_hard_regs); |
| 3196 | class_size = ira_class_hard_regs_num(this_target_ira->x_ira_class_hard_regs_num)[aclass]; |
| 3197 | /* Set up cost improvement for usage of each profitable hard |
| 3198 | register for allocno A. */ |
| 3199 | for (j = 0; j < class_size; j++) |
| 3200 | { |
| 3201 | hregno = ira_class_hard_regs(this_target_ira->x_ira_class_hard_regs)[aclass][j]; |
| 3202 | if (! check_hard_reg_p (a, hregno, |
| 3203 | conflicting_regs, profitable_hard_regs)) |
| 3204 | continue; |
| 3205 | ira_assert (ira_class_hard_reg_index[aclass][hregno] == j)((void)(!((this_target_ira_int->x_ira_class_hard_reg_index )[aclass][hregno] == j) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3205, __FUNCTION__), 0 : 0)); |
| 3206 | k = allocno_costs == NULLnullptr ? 0 : j; |
| 3207 | costs[hregno] = (allocno_costs == NULLnullptr |
| 3208 | ? ALLOCNO_UPDATED_CLASS_COST (a)((a)->updated_class_cost) : allocno_costs[k]); |
| 3209 | costs[hregno] -= allocno_copy_cost_saving (a, hregno); |
| 3210 | costs[hregno] -= base_cost; |
| 3211 | if (costs[hregno] < 0) |
| 3212 | try_p = true; |
| 3213 | } |
| 3214 | if (! try_p) |
| 3215 | /* There is no chance to improve the allocation cost by |
| 3216 | assigning hard register to allocno A even without spilling |
| 3217 | conflicting allocnos. */ |
| 3218 | continue; |
| 3219 | auto_bitmap allocnos_to_spill; |
| 3220 | HARD_REG_SET soft_conflict_regs = {}; |
| 3221 | mode = ALLOCNO_MODE (a)((a)->mode); |
| 3222 | nwords = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 3223 | /* Process each allocno conflicting with A and update the cost |
| 3224 | improvement for profitable hard registers of A. To use a |
| 3225 | hard register for A we need to spill some conflicting |
| 3226 | allocnos and that creates penalty for the cost |
| 3227 | improvement. */ |
| 3228 | for (word = 0; word < nwords; word++) |
| 3229 | { |
| 3230 | ira_object_t conflict_obj; |
| 3231 | ira_object_t obj = ALLOCNO_OBJECT (a, word)((a)->objects[word]); |
| 3232 | ira_object_conflict_iterator oci; |
| 3233 | |
| 3234 | FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)for (ira_object_conflict_iter_init (&(oci), (obj)); ira_object_conflict_iter_cond (&(oci), &(conflict_obj));) |
| 3235 | { |
| 3236 | ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj)((conflict_obj)->allocno); |
| 3237 | |
| 3238 | if (ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data))->temp == check) |
| 3239 | /* We already processed this conflicting allocno |
| 3240 | because we processed earlier another object of the |
| 3241 | conflicting allocno. */ |
| 3242 | continue; |
| 3243 | ALLOCNO_COLOR_DATA (conflict_a)((allocno_color_data_t) ((conflict_a)->add_data))->temp = check; |
| 3244 | if ((conflict_hregno = ALLOCNO_HARD_REGNO (conflict_a)((conflict_a)->hard_regno)) < 0) |
| 3245 | continue; |
| 3246 | auto spill_a = ira_soft_conflict (a, conflict_a); |
| 3247 | if (spill_a) |
| 3248 | { |
| 3249 | if (!bitmap_set_bit (allocnos_to_spill, |
| 3250 | ALLOCNO_NUM (spill_a)((spill_a)->num))) |
| 3251 | continue; |
| 3252 | ira_loop_border_costs border_costs (spill_a); |
| 3253 | spill_cost = border_costs.spill_inside_loop_cost (); |
| 3254 | } |
| 3255 | else |
| 3256 | { |
| 3257 | spill_cost = ALLOCNO_UPDATED_MEMORY_COST (conflict_a)((conflict_a)->updated_memory_cost); |
| 3258 | k = (ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index) |
| 3259 | [ALLOCNO_CLASS (conflict_a)((conflict_a)->aclass)][conflict_hregno]); |
| 3260 | ira_assert (k >= 0)((void)(!(k >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3260, __FUNCTION__), 0 : 0)); |
| 3261 | if ((allocno_costs = ALLOCNO_HARD_REG_COSTS (conflict_a)((conflict_a)->hard_reg_costs)) |
| 3262 | != NULLnullptr) |
| 3263 | spill_cost -= allocno_costs[k]; |
| 3264 | else |
| 3265 | spill_cost -= ALLOCNO_UPDATED_CLASS_COST (conflict_a)((conflict_a)->updated_class_cost); |
| 3266 | spill_cost |
| 3267 | += allocno_copy_cost_saving (conflict_a, conflict_hregno); |
| 3268 | } |
| 3269 | conflict_nregs = hard_regno_nregs (conflict_hregno, |
| 3270 | ALLOCNO_MODE (conflict_a)((conflict_a)->mode)); |
| 3271 | auto note_conflict = [&](int r) |
| 3272 | { |
| 3273 | if (check_hard_reg_p (a, r, |
| 3274 | conflicting_regs, profitable_hard_regs)) |
| 3275 | { |
| 3276 | if (spill_a) |
| 3277 | SET_HARD_REG_BIT (soft_conflict_regs, r); |
| 3278 | costs[r] += spill_cost; |
| 3279 | } |
| 3280 | }; |
| 3281 | for (r = conflict_hregno; |
| 3282 | r >= 0 && (int) end_hard_regno (mode, r) > conflict_hregno; |
| 3283 | r--) |
| 3284 | note_conflict (r); |
| 3285 | for (r = conflict_hregno + 1; |
| 3286 | r < conflict_hregno + conflict_nregs; |
| 3287 | r++) |
| 3288 | note_conflict (r); |
| 3289 | } |
| 3290 | } |
| 3291 | min_cost = INT_MAX2147483647; |
| 3292 | best = -1; |
| 3293 | /* Now we choose hard register for A which results in highest |
| 3294 | allocation cost improvement. */ |
| 3295 | for (j = 0; j < class_size; j++) |
| 3296 | { |
| 3297 | hregno = ira_class_hard_regs(this_target_ira->x_ira_class_hard_regs)[aclass][j]; |
| 3298 | if (check_hard_reg_p (a, hregno, |
| 3299 | conflicting_regs, profitable_hard_regs) |
| 3300 | && min_cost > costs[hregno]) |
| 3301 | { |
| 3302 | best = hregno; |
| 3303 | min_cost = costs[hregno]; |
| 3304 | } |
| 3305 | } |
| 3306 | if (min_cost >= 0) |
| 3307 | /* We are in a situation when assigning any hard register to A |
| 3308 | by spilling some conflicting allocnos does not improve the |
| 3309 | allocation cost. */ |
| 3310 | continue; |
| 3311 | spill_soft_conflicts (a, allocnos_to_spill, soft_conflict_regs, best); |
| 3312 | nregs = hard_regno_nregs (best, mode); |
| 3313 | /* Now spill conflicting allocnos which contain a hard register |
| 3314 | of A when we assign the best chosen hard register to it. */ |
| 3315 | for (word = 0; word < nwords; word++) |
| 3316 | { |
| 3317 | ira_object_t conflict_obj; |
| 3318 | ira_object_t obj = ALLOCNO_OBJECT (a, word)((a)->objects[word]); |
| 3319 | ira_object_conflict_iterator oci; |
| 3320 | |
| 3321 | FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)for (ira_object_conflict_iter_init (&(oci), (obj)); ira_object_conflict_iter_cond (&(oci), &(conflict_obj));) |
| 3322 | { |
| 3323 | ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj)((conflict_obj)->allocno); |
| 3324 | |
| 3325 | if ((conflict_hregno = ALLOCNO_HARD_REGNO (conflict_a)((conflict_a)->hard_regno)) < 0) |
| 3326 | continue; |
| 3327 | conflict_nregs = hard_regno_nregs (conflict_hregno, |
| 3328 | ALLOCNO_MODE (conflict_a)((conflict_a)->mode)); |
| 3329 | if (best + nregs <= conflict_hregno |
| 3330 | || conflict_hregno + conflict_nregs <= best) |
| 3331 | /* No intersection. */ |
| 3332 | continue; |
| 3333 | ALLOCNO_HARD_REGNO (conflict_a)((conflict_a)->hard_regno) = -1; |
| 3334 | sorted_allocnos[n++] = conflict_a; |
| 3335 | if (internal_flag_ira_verbose > 2 && ira_dump_file != NULLnullptr) |
| 3336 | fprintf (ira_dump_file, "Spilling a%dr%d for a%dr%d\n", |
| 3337 | ALLOCNO_NUM (conflict_a)((conflict_a)->num), ALLOCNO_REGNO (conflict_a)((conflict_a)->regno), |
| 3338 | ALLOCNO_NUM (a)((a)->num), ALLOCNO_REGNO (a)((a)->regno)); |
| 3339 | } |
| 3340 | } |
| 3341 | /* Assign the best chosen hard register to A. */ |
| 3342 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = best; |
| 3343 | if (internal_flag_ira_verbose > 2 && ira_dump_file != NULLnullptr) |
| 3344 | fprintf (ira_dump_file, "Assigning %d to a%dr%d\n", |
| 3345 | best, ALLOCNO_NUM (a)((a)->num), ALLOCNO_REGNO (a)((a)->regno)); |
| 3346 | } |
| 3347 | if (n == 0) |
| 3348 | return; |
| 3349 | /* We spilled some allocnos to assign their hard registers to other |
| 3350 | allocnos. The spilled allocnos are now in array |
| 3351 | 'sorted_allocnos'. There is still a possibility that some of the |
| 3352 | spilled allocnos can get hard registers. So let us try assign |
| 3353 | them hard registers again (just a reminder -- function |
| 3354 | 'assign_hard_reg' assigns hard registers only if it is possible |
| 3355 | and profitable). We process the spilled allocnos with biggest |
| 3356 | benefit to get hard register first -- see function |
| 3357 | 'allocno_cost_compare_func'. */ |
| 3358 | qsort (sorted_allocnos, n, sizeof (ira_allocno_t),gcc_qsort (sorted_allocnos, n, sizeof (ira_allocno_t), allocno_cost_compare_func ) |
| 3359 | allocno_cost_compare_func)gcc_qsort (sorted_allocnos, n, sizeof (ira_allocno_t), allocno_cost_compare_func ); |
| 3360 | for (j = 0; j < n; j++) |
| 3361 | { |
| 3362 | a = sorted_allocnos[j]; |
| 3363 | ALLOCNO_ASSIGNED_P (a)((a)->assigned_p) = false; |
| 3364 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 3365 | { |
| 3366 | fprintf (ira_dump_file, " "); |
| 3367 | ira_print_expanded_allocno (a); |
| 3368 | fprintf (ira_dump_file, " -- "); |
| 3369 | } |
| 3370 | if (assign_hard_reg (a, false)) |
| 3371 | { |
| 3372 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 3373 | fprintf (ira_dump_file, "assign hard reg %d\n", |
| 3374 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno)); |
| 3375 | } |
| 3376 | else |
| 3377 | { |
| 3378 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 3379 | fprintf (ira_dump_file, "assign memory\n"); |
| 3380 | } |
| 3381 | } |
| 3382 | } |
| 3383 | |
| 3384 | /* Sort allocnos according to their priorities. */ |
| 3385 | static int |
| 3386 | allocno_priority_compare_func (const void *v1p, const void *v2p) |
| 3387 | { |
| 3388 | ira_allocno_t a1 = *(const ira_allocno_t *) v1p; |
| 3389 | ira_allocno_t a2 = *(const ira_allocno_t *) v2p; |
| 3390 | int pri1, pri2, diff; |
| 3391 | |
| 3392 | /* Assign hard reg to static chain pointer pseudo first when |
| 3393 | non-local goto is used. */ |
| 3394 | if ((diff = (non_spilled_static_chain_regno_p (ALLOCNO_REGNO (a2)((a2)->regno)) |
| 3395 | - non_spilled_static_chain_regno_p (ALLOCNO_REGNO (a1)((a1)->regno)))) != 0) |
| 3396 | return diff; |
| 3397 | pri1 = allocno_priorities[ALLOCNO_NUM (a1)((a1)->num)]; |
| 3398 | pri2 = allocno_priorities[ALLOCNO_NUM (a2)((a2)->num)]; |
| 3399 | if (pri2 != pri1) |
| 3400 | return SORTGT (pri2, pri1)(((pri2) > (pri1)) ? 1 : -1); |
| 3401 | |
| 3402 | /* If regs are equally good, sort by allocnos, so that the results of |
| 3403 | qsort leave nothing to chance. */ |
| 3404 | return ALLOCNO_NUM (a1)((a1)->num) - ALLOCNO_NUM (a2)((a2)->num); |
| 3405 | } |
| 3406 | |
| 3407 | /* Chaitin-Briggs coloring for allocnos in COLORING_ALLOCNO_BITMAP |
| 3408 | taking into account allocnos in CONSIDERATION_ALLOCNO_BITMAP. */ |
| 3409 | static void |
| 3410 | color_allocnos (void) |
| 3411 | { |
| 3412 | unsigned int i, n; |
| 3413 | bitmap_iterator bi; |
| 3414 | ira_allocno_t a; |
| 3415 | |
| 3416 | setup_profitable_hard_regs (); |
| 3417 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 3418 | { |
| 3419 | allocno_color_data_t data; |
| 3420 | ira_pref_t pref, next_pref; |
| 3421 | |
| 3422 | a = ira_allocnos[i]; |
| 3423 | data = ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data)); |
| 3424 | data->conflict_allocno_hard_prefs = 0; |
| 3425 | for (pref = ALLOCNO_PREFS (a)((a)->allocno_prefs); pref != NULLnullptr; pref = next_pref) |
| 3426 | { |
| 3427 | next_pref = pref->next_pref; |
| 3428 | if (! ira_hard_reg_in_set_p (pref->hard_regno, |
| 3429 | ALLOCNO_MODE (a)((a)->mode), |
| 3430 | data->profitable_hard_regs)) |
| 3431 | ira_remove_pref (pref); |
| 3432 | } |
| 3433 | } |
| 3434 | |
| 3435 | if (flag_ira_algorithmglobal_options.x_flag_ira_algorithm == IRA_ALGORITHM_PRIORITY) |
| 3436 | { |
| 3437 | n = 0; |
| 3438 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 3439 | { |
| 3440 | a = ira_allocnos[i]; |
| 3441 | if (ALLOCNO_CLASS (a)((a)->aclass) == NO_REGS) |
| 3442 | { |
| 3443 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = -1; |
| 3444 | ALLOCNO_ASSIGNED_P (a)((a)->assigned_p) = true; |
| 3445 | ira_assert (ALLOCNO_UPDATED_HARD_REG_COSTS (a) == NULL)((void)(!(((a)->updated_hard_reg_costs) == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3445, __FUNCTION__), 0 : 0)); |
| 3446 | ira_assert (ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a) == NULL)((void)(!(((a)->updated_conflict_hard_reg_costs) == nullptr ) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3446, __FUNCTION__), 0 : 0)); |
| 3447 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 3448 | { |
| 3449 | fprintf (ira_dump_file, " Spill"); |
| 3450 | ira_print_expanded_allocno (a); |
| 3451 | fprintf (ira_dump_file, "\n"); |
| 3452 | } |
| 3453 | continue; |
| 3454 | } |
| 3455 | sorted_allocnos[n++] = a; |
| 3456 | } |
| 3457 | if (n != 0) |
| 3458 | { |
| 3459 | setup_allocno_priorities (sorted_allocnos, n); |
| 3460 | qsort (sorted_allocnos, n, sizeof (ira_allocno_t),gcc_qsort (sorted_allocnos, n, sizeof (ira_allocno_t), allocno_priority_compare_func ) |
| 3461 | allocno_priority_compare_func)gcc_qsort (sorted_allocnos, n, sizeof (ira_allocno_t), allocno_priority_compare_func ); |
| 3462 | for (i = 0; i < n; i++) |
| 3463 | { |
| 3464 | a = sorted_allocnos[i]; |
| 3465 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 3466 | { |
| 3467 | fprintf (ira_dump_file, " "); |
| 3468 | ira_print_expanded_allocno (a); |
| 3469 | fprintf (ira_dump_file, " -- "); |
| 3470 | } |
| 3471 | if (assign_hard_reg (a, false)) |
| 3472 | { |
| 3473 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 3474 | fprintf (ira_dump_file, "assign hard reg %d\n", |
| 3475 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno)); |
| 3476 | } |
| 3477 | else |
| 3478 | { |
| 3479 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 3480 | fprintf (ira_dump_file, "assign memory\n"); |
| 3481 | } |
| 3482 | } |
| 3483 | } |
| 3484 | } |
| 3485 | else |
| 3486 | { |
| 3487 | form_allocno_hard_regs_nodes_forest (); |
| 3488 | if (internal_flag_ira_verbose > 2 && ira_dump_file != NULLnullptr) |
| 3489 | print_hard_regs_forest (ira_dump_file); |
| 3490 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 3491 | { |
| 3492 | a = ira_allocnos[i]; |
| 3493 | if (ALLOCNO_CLASS (a)((a)->aclass) != NO_REGS && ! empty_profitable_hard_regs (a)) |
| 3494 | { |
| 3495 | ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->in_graph_p = true; |
| 3496 | update_conflict_allocno_hard_prefs (a); |
| 3497 | } |
| 3498 | else |
| 3499 | { |
| 3500 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = -1; |
| 3501 | ALLOCNO_ASSIGNED_P (a)((a)->assigned_p) = true; |
| 3502 | /* We don't need updated costs anymore. */ |
| 3503 | ira_free_allocno_updated_costs (a); |
| 3504 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 3505 | { |
| 3506 | fprintf (ira_dump_file, " Spill"); |
| 3507 | ira_print_expanded_allocno (a); |
| 3508 | fprintf (ira_dump_file, "\n"); |
| 3509 | } |
| 3510 | } |
| 3511 | } |
| 3512 | /* Put the allocnos into the corresponding buckets. */ |
| 3513 | colorable_allocno_bucket = NULLnullptr; |
| 3514 | uncolorable_allocno_bucket = NULLnullptr; |
| 3515 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, i, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 3516 | { |
| 3517 | a = ira_allocnos[i]; |
| 3518 | if (ALLOCNO_COLOR_DATA (a)((allocno_color_data_t) ((a)->add_data))->in_graph_p) |
| 3519 | put_allocno_into_bucket (a); |
| 3520 | } |
| 3521 | push_allocnos_to_stack (); |
| 3522 | pop_allocnos_from_stack (); |
| 3523 | finish_allocno_hard_regs_nodes_forest (); |
| 3524 | } |
| 3525 | improve_allocation (); |
| 3526 | } |
| 3527 | |
| 3528 | |
| 3529 | |
| 3530 | /* Output information about the loop given by its LOOP_TREE_NODE. */ |
| 3531 | static void |
| 3532 | print_loop_title (ira_loop_tree_node_t loop_tree_node) |
| 3533 | { |
| 3534 | unsigned int j; |
| 3535 | bitmap_iterator bi; |
| 3536 | ira_loop_tree_node_t subloop_node, dest_loop_node; |
| 3537 | edge e; |
| 3538 | edge_iterator ei; |
| 3539 | |
| 3540 | if (loop_tree_node->parent == NULLnullptr) |
| 3541 | fprintf (ira_dump_file, |
| 3542 | "\n Loop 0 (parent -1, header bb%d, depth 0)\n bbs:", |
| 3543 | NUM_FIXED_BLOCKS(2)); |
| 3544 | else |
| 3545 | { |
| 3546 | ira_assert (current_loops != NULL && loop_tree_node->loop != NULL)((void)(!(((cfun + 0)->x_current_loops) != nullptr && loop_tree_node->loop != nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3546, __FUNCTION__), 0 : 0)); |
| 3547 | fprintf (ira_dump_file, |
| 3548 | "\n Loop %d (parent %d, header bb%d, depth %d)\n bbs:", |
| 3549 | loop_tree_node->loop_num, loop_tree_node->parent->loop_num, |
| 3550 | loop_tree_node->loop->header->index, |
| 3551 | loop_depth (loop_tree_node->loop)); |
| 3552 | } |
| 3553 | for (subloop_node = loop_tree_node->children; |
| 3554 | subloop_node != NULLnullptr; |
| 3555 | subloop_node = subloop_node->next) |
| 3556 | if (subloop_node->bb != NULLnullptr) |
| 3557 | { |
| 3558 | fprintf (ira_dump_file, " %d", subloop_node->bb->index); |
| 3559 | FOR_EACH_EDGE (e, ei, subloop_node->bb->succs)for ((ei) = ei_start_1 (&((subloop_node->bb->succs) )); ei_cond ((ei), &(e)); ei_next (&(ei))) |
| 3560 | if (e->dest != EXIT_BLOCK_PTR_FOR_FN (cfun)(((cfun + 0))->cfg->x_exit_block_ptr) |
| 3561 | && ((dest_loop_node = IRA_BB_NODE (e->dest)__extension__ (({ ira_loop_tree_node_t _node = (&ira_bb_nodes [(e->dest)->index]); if (_node->children != nullptr || _node->loop != nullptr || _node->bb == nullptr) { fprintf (stderr, "\n%s: %d: error in %s: it is not a block node\n", "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3561, __FUNCTION__); (fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3561, __FUNCTION__)); } _node; }))->parent) |
| 3562 | != loop_tree_node)) |
| 3563 | fprintf (ira_dump_file, "(->%d:l%d)", |
| 3564 | e->dest->index, dest_loop_node->loop_num); |
| 3565 | } |
| 3566 | fprintf (ira_dump_file, "\n all:"); |
| 3567 | EXECUTE_IF_SET_IN_BITMAP (loop_tree_node->all_allocnos, 0, j, bi)for (bmp_iter_set_init (&(bi), (loop_tree_node->all_allocnos ), (0), &(j)); bmp_iter_set (&(bi), &(j)); bmp_iter_next (&(bi), &(j))) |
| 3568 | fprintf (ira_dump_file, " %dr%d", j, ALLOCNO_REGNO (ira_allocnos[j])((ira_allocnos[j])->regno)); |
| 3569 | fprintf (ira_dump_file, "\n modified regnos:"); |
| 3570 | EXECUTE_IF_SET_IN_BITMAP (loop_tree_node->modified_regnos, 0, j, bi)for (bmp_iter_set_init (&(bi), (loop_tree_node->modified_regnos ), (0), &(j)); bmp_iter_set (&(bi), &(j)); bmp_iter_next (&(bi), &(j))) |
| 3571 | fprintf (ira_dump_file, " %d", j); |
| 3572 | fprintf (ira_dump_file, "\n border:"); |
| 3573 | EXECUTE_IF_SET_IN_BITMAP (loop_tree_node->border_allocnos, 0, j, bi)for (bmp_iter_set_init (&(bi), (loop_tree_node->border_allocnos ), (0), &(j)); bmp_iter_set (&(bi), &(j)); bmp_iter_next (&(bi), &(j))) |
| 3574 | fprintf (ira_dump_file, " %dr%d", j, ALLOCNO_REGNO (ira_allocnos[j])((ira_allocnos[j])->regno)); |
| 3575 | fprintf (ira_dump_file, "\n Pressure:"); |
| 3576 | for (j = 0; (int) j < ira_pressure_classes_num(this_target_ira->x_ira_pressure_classes_num); j++) |
| 3577 | { |
| 3578 | enum reg_class pclass; |
| 3579 | |
| 3580 | pclass = ira_pressure_classes(this_target_ira->x_ira_pressure_classes)[j]; |
| 3581 | if (loop_tree_node->reg_pressure[pclass] == 0) |
| 3582 | continue; |
| 3583 | fprintf (ira_dump_file, " %s=%d", reg_class_names[pclass], |
| 3584 | loop_tree_node->reg_pressure[pclass]); |
| 3585 | } |
| 3586 | fprintf (ira_dump_file, "\n"); |
| 3587 | } |
| 3588 | |
| 3589 | /* Color the allocnos inside loop (in the extreme case it can be all |
| 3590 | of the function) given the corresponding LOOP_TREE_NODE. The |
| 3591 | function is called for each loop during top-down traverse of the |
| 3592 | loop tree. */ |
| 3593 | static void |
| 3594 | color_pass (ira_loop_tree_node_t loop_tree_node) |
| 3595 | { |
| 3596 | int regno, hard_regno, index = -1, n; |
| 3597 | int cost; |
| 3598 | unsigned int j; |
| 3599 | bitmap_iterator bi; |
| 3600 | machine_mode mode; |
| 3601 | enum reg_class rclass, aclass; |
| 3602 | ira_allocno_t a, subloop_allocno; |
| 3603 | ira_loop_tree_node_t subloop_node; |
| 3604 | |
| 3605 | ira_assert (loop_tree_node->bb == NULL)((void)(!(loop_tree_node->bb == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3605, __FUNCTION__), 0 : 0)); |
| 3606 | if (internal_flag_ira_verbose > 1 && ira_dump_file != NULLnullptr) |
| 3607 | print_loop_title (loop_tree_node); |
| 3608 | |
| 3609 | bitmap_copy (coloring_allocno_bitmap, loop_tree_node->all_allocnos); |
| 3610 | bitmap_copy (consideration_allocno_bitmap, coloring_allocno_bitmap); |
| 3611 | n = 0; |
| 3612 | EXECUTE_IF_SET_IN_BITMAP (consideration_allocno_bitmap, 0, j, bi)for (bmp_iter_set_init (&(bi), (consideration_allocno_bitmap ), (0), &(j)); bmp_iter_set (&(bi), &(j)); bmp_iter_next (&(bi), &(j))) |
| 3613 | { |
| 3614 | a = ira_allocnos[j]; |
| 3615 | n++; |
| 3616 | if (! ALLOCNO_ASSIGNED_P (a)((a)->assigned_p)) |
| 3617 | continue; |
| 3618 | bitmap_clear_bit (coloring_allocno_bitmap, ALLOCNO_NUM (a)((a)->num)); |
| 3619 | } |
| 3620 | allocno_color_data |
| 3621 | = (allocno_color_data_t) ira_allocate (sizeof (struct allocno_color_data) |
| 3622 | * n); |
| 3623 | memset (allocno_color_data, 0, sizeof (struct allocno_color_data) * n); |
| 3624 | curr_allocno_process = 0; |
| 3625 | n = 0; |
| 3626 | EXECUTE_IF_SET_IN_BITMAP (consideration_allocno_bitmap, 0, j, bi)for (bmp_iter_set_init (&(bi), (consideration_allocno_bitmap ), (0), &(j)); bmp_iter_set (&(bi), &(j)); bmp_iter_next (&(bi), &(j))) |
| 3627 | { |
| 3628 | a = ira_allocnos[j]; |
| 3629 | ALLOCNO_ADD_DATA (a)((a)->add_data) = allocno_color_data + n; |
| 3630 | n++; |
| 3631 | } |
| 3632 | init_allocno_threads (); |
| 3633 | /* Color all mentioned allocnos including transparent ones. */ |
| 3634 | color_allocnos (); |
| 3635 | /* Process caps. They are processed just once. */ |
| 3636 | if (flag_ira_regionglobal_options.x_flag_ira_region == IRA_REGION_MIXED |
| 3637 | || flag_ira_regionglobal_options.x_flag_ira_region == IRA_REGION_ALL) |
| 3638 | EXECUTE_IF_SET_IN_BITMAP (loop_tree_node->all_allocnos, 0, j, bi)for (bmp_iter_set_init (&(bi), (loop_tree_node->all_allocnos ), (0), &(j)); bmp_iter_set (&(bi), &(j)); bmp_iter_next (&(bi), &(j))) |
| 3639 | { |
| 3640 | a = ira_allocnos[j]; |
| 3641 | if (ALLOCNO_CAP_MEMBER (a)((a)->cap_member) == NULLnullptr) |
| 3642 | continue; |
| 3643 | /* Remove from processing in the next loop. */ |
| 3644 | bitmap_clear_bit (consideration_allocno_bitmap, j); |
| 3645 | rclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 3646 | subloop_allocno = ALLOCNO_CAP_MEMBER (a)((a)->cap_member); |
| 3647 | subloop_node = ALLOCNO_LOOP_TREE_NODE (subloop_allocno)((subloop_allocno)->loop_tree_node); |
| 3648 | if (ira_single_region_allocno_p (a, subloop_allocno)) |
| 3649 | { |
| 3650 | mode = ALLOCNO_MODE (a)((a)->mode); |
| 3651 | hard_regno = ALLOCNO_HARD_REGNO (a)((a)->hard_regno); |
| 3652 | if (hard_regno >= 0) |
| 3653 | { |
| 3654 | index = ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[rclass][hard_regno]; |
| 3655 | ira_assert (index >= 0)((void)(!(index >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3655, __FUNCTION__), 0 : 0)); |
| 3656 | } |
| 3657 | regno = ALLOCNO_REGNO (a)((a)->regno); |
Value stored to 'regno' is never read | |
| 3658 | ira_assert (!ALLOCNO_ASSIGNED_P (subloop_allocno))((void)(!(!((subloop_allocno)->assigned_p)) ? fancy_abort ( "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3658, __FUNCTION__), 0 : 0)); |
| 3659 | ALLOCNO_HARD_REGNO (subloop_allocno)((subloop_allocno)->hard_regno) = hard_regno; |
| 3660 | ALLOCNO_ASSIGNED_P (subloop_allocno)((subloop_allocno)->assigned_p) = true; |
| 3661 | if (hard_regno >= 0) |
| 3662 | update_costs_from_copies (subloop_allocno, true, true); |
| 3663 | /* We don't need updated costs anymore. */ |
| 3664 | ira_free_allocno_updated_costs (subloop_allocno); |
| 3665 | } |
| 3666 | } |
| 3667 | /* Update costs of the corresponding allocnos (not caps) in the |
| 3668 | subloops. */ |
| 3669 | for (subloop_node = loop_tree_node->subloops; |
| 3670 | subloop_node != NULLnullptr; |
| 3671 | subloop_node = subloop_node->subloop_next) |
| 3672 | { |
| 3673 | ira_assert (subloop_node->bb == NULL)((void)(!(subloop_node->bb == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3673, __FUNCTION__), 0 : 0)); |
| 3674 | EXECUTE_IF_SET_IN_BITMAP (consideration_allocno_bitmap, 0, j, bi)for (bmp_iter_set_init (&(bi), (consideration_allocno_bitmap ), (0), &(j)); bmp_iter_set (&(bi), &(j)); bmp_iter_next (&(bi), &(j))) |
| 3675 | { |
| 3676 | a = ira_allocnos[j]; |
| 3677 | ira_assert (ALLOCNO_CAP_MEMBER (a) == NULL)((void)(!(((a)->cap_member) == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3677, __FUNCTION__), 0 : 0)); |
| 3678 | mode = ALLOCNO_MODE (a)((a)->mode); |
| 3679 | rclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 3680 | hard_regno = ALLOCNO_HARD_REGNO (a)((a)->hard_regno); |
| 3681 | /* Use hard register class here. ??? */ |
| 3682 | if (hard_regno >= 0) |
| 3683 | { |
| 3684 | index = ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[rclass][hard_regno]; |
| 3685 | ira_assert (index >= 0)((void)(!(index >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3685, __FUNCTION__), 0 : 0)); |
| 3686 | } |
| 3687 | regno = ALLOCNO_REGNO (a)((a)->regno); |
| 3688 | /* ??? conflict costs */ |
| 3689 | subloop_allocno = subloop_node->regno_allocno_map[regno]; |
| 3690 | if (subloop_allocno == NULLnullptr |
| 3691 | || ALLOCNO_CAP (subloop_allocno)((subloop_allocno)->cap) != NULLnullptr) |
| 3692 | continue; |
| 3693 | ira_assert (ALLOCNO_CLASS (subloop_allocno) == rclass)((void)(!(((subloop_allocno)->aclass) == rclass) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3693, __FUNCTION__), 0 : 0)); |
| 3694 | ira_assert (bitmap_bit_p (subloop_node->all_allocnos,((void)(!(bitmap_bit_p (subloop_node->all_allocnos, ((subloop_allocno )->num))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3695, __FUNCTION__), 0 : 0)) |
| 3695 | ALLOCNO_NUM (subloop_allocno)))((void)(!(bitmap_bit_p (subloop_node->all_allocnos, ((subloop_allocno )->num))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3695, __FUNCTION__), 0 : 0)); |
| 3696 | if (ira_single_region_allocno_p (a, subloop_allocno) |
| 3697 | || !ira_subloop_allocnos_can_differ_p (a, hard_regno >= 0, |
| 3698 | false)) |
| 3699 | { |
| 3700 | gcc_assert (!ALLOCNO_MIGHT_CONFLICT_WITH_PARENT_P((void)(!(!((subloop_allocno)->might_conflict_with_parent_p )) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3701, __FUNCTION__), 0 : 0)) |
| 3701 | (subloop_allocno))((void)(!(!((subloop_allocno)->might_conflict_with_parent_p )) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3701, __FUNCTION__), 0 : 0)); |
| 3702 | if (! ALLOCNO_ASSIGNED_P (subloop_allocno)((subloop_allocno)->assigned_p)) |
| 3703 | { |
| 3704 | ALLOCNO_HARD_REGNO (subloop_allocno)((subloop_allocno)->hard_regno) = hard_regno; |
| 3705 | ALLOCNO_ASSIGNED_P (subloop_allocno)((subloop_allocno)->assigned_p) = true; |
| 3706 | if (hard_regno >= 0) |
| 3707 | update_costs_from_copies (subloop_allocno, true, true); |
| 3708 | /* We don't need updated costs anymore. */ |
| 3709 | ira_free_allocno_updated_costs (subloop_allocno); |
| 3710 | } |
| 3711 | } |
| 3712 | else if (hard_regno < 0) |
| 3713 | { |
| 3714 | /* If we allocate a register to SUBLOOP_ALLOCNO, we'll need |
| 3715 | to load the register on entry to the subloop and store |
| 3716 | the register back on exit from the subloop. This incurs |
| 3717 | a fixed cost for all registers. Since UPDATED_MEMORY_COST |
| 3718 | is (and should only be) used relative to the register costs |
| 3719 | for the same allocno, we can subtract this shared register |
| 3720 | cost from the memory cost. */ |
| 3721 | ira_loop_border_costs border_costs (subloop_allocno); |
| 3722 | ALLOCNO_UPDATED_MEMORY_COST (subloop_allocno)((subloop_allocno)->updated_memory_cost) |
| 3723 | -= border_costs.spill_outside_loop_cost (); |
| 3724 | } |
| 3725 | else |
| 3726 | { |
| 3727 | ira_loop_border_costs border_costs (subloop_allocno); |
| 3728 | aclass = ALLOCNO_CLASS (subloop_allocno)((subloop_allocno)->aclass); |
| 3729 | ira_init_register_move_cost_if_necessary (mode); |
| 3730 | cost = border_costs.move_between_loops_cost (); |
| 3731 | ira_allocate_and_set_or_copy_costs |
| 3732 | (&ALLOCNO_UPDATED_HARD_REG_COSTS (subloop_allocno)((subloop_allocno)->updated_hard_reg_costs), aclass, |
| 3733 | ALLOCNO_UPDATED_CLASS_COST (subloop_allocno)((subloop_allocno)->updated_class_cost), |
| 3734 | ALLOCNO_HARD_REG_COSTS (subloop_allocno)((subloop_allocno)->hard_reg_costs)); |
| 3735 | ira_allocate_and_set_or_copy_costs |
| 3736 | (&ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (subloop_allocno)((subloop_allocno)->updated_conflict_hard_reg_costs), |
| 3737 | aclass, 0, ALLOCNO_CONFLICT_HARD_REG_COSTS (subloop_allocno)((subloop_allocno)->conflict_hard_reg_costs)); |
| 3738 | ALLOCNO_UPDATED_HARD_REG_COSTS (subloop_allocno)((subloop_allocno)->updated_hard_reg_costs)[index] -= cost; |
| 3739 | ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (subloop_allocno)((subloop_allocno)->updated_conflict_hard_reg_costs)[index] |
| 3740 | -= cost; |
| 3741 | if (ALLOCNO_UPDATED_CLASS_COST (subloop_allocno)((subloop_allocno)->updated_class_cost) |
| 3742 | > ALLOCNO_UPDATED_HARD_REG_COSTS (subloop_allocno)((subloop_allocno)->updated_hard_reg_costs)[index]) |
| 3743 | ALLOCNO_UPDATED_CLASS_COST (subloop_allocno)((subloop_allocno)->updated_class_cost) |
| 3744 | = ALLOCNO_UPDATED_HARD_REG_COSTS (subloop_allocno)((subloop_allocno)->updated_hard_reg_costs)[index]; |
| 3745 | /* If we spill SUBLOOP_ALLOCNO, we'll need to store HARD_REGNO |
| 3746 | on entry to the subloop and restore HARD_REGNO on exit from |
| 3747 | the subloop. */ |
| 3748 | ALLOCNO_UPDATED_MEMORY_COST (subloop_allocno)((subloop_allocno)->updated_memory_cost) |
| 3749 | += border_costs.spill_inside_loop_cost (); |
| 3750 | } |
| 3751 | } |
| 3752 | } |
| 3753 | ira_free (allocno_color_data); |
| 3754 | EXECUTE_IF_SET_IN_BITMAP (consideration_allocno_bitmap, 0, j, bi)for (bmp_iter_set_init (&(bi), (consideration_allocno_bitmap ), (0), &(j)); bmp_iter_set (&(bi), &(j)); bmp_iter_next (&(bi), &(j))) |
| 3755 | { |
| 3756 | a = ira_allocnos[j]; |
| 3757 | ALLOCNO_ADD_DATA (a)((a)->add_data) = NULLnullptr; |
| 3758 | } |
| 3759 | } |
| 3760 | |
| 3761 | /* Initialize the common data for coloring and calls functions to do |
| 3762 | Chaitin-Briggs and regional coloring. */ |
| 3763 | static void |
| 3764 | do_coloring (void) |
| 3765 | { |
| 3766 | coloring_allocno_bitmap = ira_allocate_bitmap (); |
| 3767 | if (internal_flag_ira_verbose > 0 && ira_dump_file != NULLnullptr) |
| 3768 | fprintf (ira_dump_file, "\n**** Allocnos coloring:\n\n"); |
| 3769 | |
| 3770 | ira_traverse_loop_tree (false, ira_loop_tree_root, color_pass, NULLnullptr); |
| 3771 | |
| 3772 | if (internal_flag_ira_verbose > 1 && ira_dump_file != NULLnullptr) |
| 3773 | ira_print_disposition (ira_dump_file); |
| 3774 | |
| 3775 | ira_free_bitmap (coloring_allocno_bitmap); |
| 3776 | } |
| 3777 | |
| 3778 | |
| 3779 | |
| 3780 | /* Move spill/restore code, which are to be generated in ira-emit.cc, |
| 3781 | to less frequent points (if it is profitable) by reassigning some |
| 3782 | allocnos (in loop with subloops containing in another loop) to |
| 3783 | memory which results in longer live-range where the corresponding |
| 3784 | pseudo-registers will be in memory. */ |
| 3785 | static void |
| 3786 | move_spill_restore (void) |
| 3787 | { |
| 3788 | int cost, regno, hard_regno, hard_regno2, index; |
| 3789 | bool changed_p; |
| 3790 | machine_mode mode; |
| 3791 | enum reg_class rclass; |
| 3792 | ira_allocno_t a, parent_allocno, subloop_allocno; |
| 3793 | ira_loop_tree_node_t parent, loop_node, subloop_node; |
| 3794 | ira_allocno_iterator ai; |
| 3795 | |
| 3796 | for (;;) |
| 3797 | { |
| 3798 | changed_p = false; |
| 3799 | if (internal_flag_ira_verbose > 0 && ira_dump_file != NULLnullptr) |
| 3800 | fprintf (ira_dump_file, "New iteration of spill/restore move\n"); |
| 3801 | FOR_EACH_ALLOCNO (a, ai)for (ira_allocno_iter_init (&(ai)); ira_allocno_iter_cond (&(ai), &(a));) |
| 3802 | { |
| 3803 | regno = ALLOCNO_REGNO (a)((a)->regno); |
| 3804 | loop_node = ALLOCNO_LOOP_TREE_NODE (a)((a)->loop_tree_node); |
| 3805 | if (ALLOCNO_CAP_MEMBER (a)((a)->cap_member) != NULLnullptr |
| 3806 | || ALLOCNO_CAP (a)((a)->cap) != NULLnullptr |
| 3807 | || (hard_regno = ALLOCNO_HARD_REGNO (a)((a)->hard_regno)) < 0 |
| 3808 | || loop_node->children == NULLnullptr |
| 3809 | /* don't do the optimization because it can create |
| 3810 | copies and the reload pass can spill the allocno set |
| 3811 | by copy although the allocno will not get memory |
| 3812 | slot. */ |
| 3813 | || ira_equiv_no_lvalue_p (regno) |
| 3814 | || !bitmap_bit_p (loop_node->border_allocnos, ALLOCNO_NUM (a)((a)->num)) |
| 3815 | /* Do not spill static chain pointer pseudo when |
| 3816 | non-local goto is used. */ |
| 3817 | || non_spilled_static_chain_regno_p (regno)) |
| 3818 | continue; |
| 3819 | mode = ALLOCNO_MODE (a)((a)->mode); |
| 3820 | rclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 3821 | index = ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[rclass][hard_regno]; |
| 3822 | ira_assert (index >= 0)((void)(!(index >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3822, __FUNCTION__), 0 : 0)); |
| 3823 | cost = (ALLOCNO_MEMORY_COST (a)((a)->memory_cost) |
| 3824 | - (ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs) == NULLnullptr |
| 3825 | ? ALLOCNO_CLASS_COST (a)((a)->class_cost) |
| 3826 | : ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs)[index])); |
| 3827 | ira_init_register_move_cost_if_necessary (mode); |
| 3828 | for (subloop_node = loop_node->subloops; |
| 3829 | subloop_node != NULLnullptr; |
| 3830 | subloop_node = subloop_node->subloop_next) |
| 3831 | { |
| 3832 | ira_assert (subloop_node->bb == NULL)((void)(!(subloop_node->bb == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3832, __FUNCTION__), 0 : 0)); |
| 3833 | subloop_allocno = subloop_node->regno_allocno_map[regno]; |
| 3834 | if (subloop_allocno == NULLnullptr) |
| 3835 | continue; |
| 3836 | ira_assert (rclass == ALLOCNO_CLASS (subloop_allocno))((void)(!(rclass == ((subloop_allocno)->aclass)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3836, __FUNCTION__), 0 : 0)); |
| 3837 | ira_loop_border_costs border_costs (subloop_allocno); |
| 3838 | |
| 3839 | /* We have accumulated cost. To get the real cost of |
| 3840 | allocno usage in the loop we should subtract the costs |
| 3841 | added by propagate_allocno_info for the subloop allocnos. */ |
| 3842 | int reg_cost |
| 3843 | = (ALLOCNO_HARD_REG_COSTS (subloop_allocno)((subloop_allocno)->hard_reg_costs) == NULLnullptr |
| 3844 | ? ALLOCNO_CLASS_COST (subloop_allocno)((subloop_allocno)->class_cost) |
| 3845 | : ALLOCNO_HARD_REG_COSTS (subloop_allocno)((subloop_allocno)->hard_reg_costs)[index]); |
| 3846 | |
| 3847 | int spill_cost |
| 3848 | = (border_costs.spill_inside_loop_cost () |
| 3849 | + ALLOCNO_MEMORY_COST (subloop_allocno)((subloop_allocno)->memory_cost)); |
| 3850 | |
| 3851 | /* If HARD_REGNO conflicts with SUBLOOP_A then |
| 3852 | propagate_allocno_info will have propagated |
| 3853 | the cost of spilling HARD_REGNO in SUBLOOP_NODE. |
| 3854 | (ira_subloop_allocnos_can_differ_p must be true |
| 3855 | in that case.) If HARD_REGNO is a caller-saved |
| 3856 | register, we might have modelled it in the same way. |
| 3857 | |
| 3858 | Otherwise, SPILL_COST acted as a cap on the propagated |
| 3859 | register cost, in cases where the allocations can differ. */ |
| 3860 | auto conflicts = ira_total_conflict_hard_regs (subloop_allocno); |
| 3861 | if (TEST_HARD_REG_BIT (conflicts, hard_regno) |
| 3862 | || (ira_need_caller_save_p (subloop_allocno, hard_regno) |
| 3863 | && ira_caller_save_loop_spill_p (a, subloop_allocno, |
| 3864 | spill_cost))) |
| 3865 | reg_cost = spill_cost; |
| 3866 | else if (ira_subloop_allocnos_can_differ_p (a)) |
| 3867 | reg_cost = MIN (reg_cost, spill_cost)((reg_cost) < (spill_cost) ? (reg_cost) : (spill_cost)); |
| 3868 | |
| 3869 | cost -= ALLOCNO_MEMORY_COST (subloop_allocno)((subloop_allocno)->memory_cost) - reg_cost; |
| 3870 | |
| 3871 | if ((hard_regno2 = ALLOCNO_HARD_REGNO (subloop_allocno)((subloop_allocno)->hard_regno)) < 0) |
| 3872 | /* The register was spilled in the subloop. If we spill |
| 3873 | it in the outer loop too then we'll no longer need to |
| 3874 | save the register on entry to the subloop and restore |
| 3875 | the register on exit from the subloop. */ |
| 3876 | cost -= border_costs.spill_inside_loop_cost (); |
| 3877 | else |
| 3878 | { |
| 3879 | /* The register was also allocated in the subloop. If we |
| 3880 | spill it in the outer loop then we'll need to load the |
| 3881 | register on entry to the subloop and store the register |
| 3882 | back on exit from the subloop. */ |
| 3883 | cost += border_costs.spill_outside_loop_cost (); |
| 3884 | if (hard_regno2 != hard_regno) |
| 3885 | cost -= border_costs.move_between_loops_cost (); |
| 3886 | } |
| 3887 | } |
| 3888 | if ((parent = loop_node->parent) != NULLnullptr |
| 3889 | && (parent_allocno = parent->regno_allocno_map[regno]) != NULLnullptr) |
| 3890 | { |
| 3891 | ira_assert (rclass == ALLOCNO_CLASS (parent_allocno))((void)(!(rclass == ((parent_allocno)->aclass)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3891, __FUNCTION__), 0 : 0)); |
| 3892 | ira_loop_border_costs border_costs (a); |
| 3893 | if ((hard_regno2 = ALLOCNO_HARD_REGNO (parent_allocno)((parent_allocno)->hard_regno)) < 0) |
| 3894 | /* The register was spilled in the parent loop. If we spill |
| 3895 | it in this loop too then we'll no longer need to load the |
| 3896 | register on entry to this loop and save the register back |
| 3897 | on exit from this loop. */ |
| 3898 | cost -= border_costs.spill_outside_loop_cost (); |
| 3899 | else |
| 3900 | { |
| 3901 | /* The register was also allocated in the parent loop. |
| 3902 | If we spill it in this loop then we'll need to save |
| 3903 | the register on entry to this loop and restore the |
| 3904 | register on exit from this loop. */ |
| 3905 | cost += border_costs.spill_inside_loop_cost (); |
| 3906 | if (hard_regno2 != hard_regno) |
| 3907 | cost -= border_costs.move_between_loops_cost (); |
| 3908 | } |
| 3909 | } |
| 3910 | if (cost < 0) |
| 3911 | { |
| 3912 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = -1; |
| 3913 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 3914 | { |
| 3915 | fprintf |
| 3916 | (ira_dump_file, |
| 3917 | " Moving spill/restore for a%dr%d up from loop %d", |
| 3918 | ALLOCNO_NUM (a)((a)->num), regno, loop_node->loop_num); |
| 3919 | fprintf (ira_dump_file, " - profit %d\n", -cost); |
| 3920 | } |
| 3921 | changed_p = true; |
| 3922 | } |
| 3923 | } |
| 3924 | if (! changed_p) |
| 3925 | break; |
| 3926 | } |
| 3927 | } |
| 3928 | |
| 3929 | |
| 3930 | |
| 3931 | /* Update current hard reg costs and current conflict hard reg costs |
| 3932 | for allocno A. It is done by processing its copies containing |
| 3933 | other allocnos already assigned. */ |
| 3934 | static void |
| 3935 | update_curr_costs (ira_allocno_t a) |
| 3936 | { |
| 3937 | int i, hard_regno, cost; |
| 3938 | machine_mode mode; |
| 3939 | enum reg_class aclass, rclass; |
| 3940 | ira_allocno_t another_a; |
| 3941 | ira_copy_t cp, next_cp; |
| 3942 | |
| 3943 | ira_free_allocno_updated_costs (a); |
| 3944 | ira_assert (! ALLOCNO_ASSIGNED_P (a))((void)(!(! ((a)->assigned_p)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3944, __FUNCTION__), 0 : 0)); |
| 3945 | aclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 3946 | if (aclass == NO_REGS) |
| 3947 | return; |
| 3948 | mode = ALLOCNO_MODE (a)((a)->mode); |
| 3949 | ira_init_register_move_cost_if_necessary (mode); |
| 3950 | for (cp = ALLOCNO_COPIES (a)((a)->allocno_copies); cp != NULLnullptr; cp = next_cp) |
| 3951 | { |
| 3952 | if (cp->first == a) |
| 3953 | { |
| 3954 | next_cp = cp->next_first_allocno_copy; |
| 3955 | another_a = cp->second; |
| 3956 | } |
| 3957 | else if (cp->second == a) |
| 3958 | { |
| 3959 | next_cp = cp->next_second_allocno_copy; |
| 3960 | another_a = cp->first; |
| 3961 | } |
| 3962 | else |
| 3963 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 3963, __FUNCTION__)); |
| 3964 | if (! ira_reg_classes_intersect_p(this_target_ira->x_ira_reg_classes_intersect_p)[aclass][ALLOCNO_CLASS (another_a)((another_a)->aclass)] |
| 3965 | || ! ALLOCNO_ASSIGNED_P (another_a)((another_a)->assigned_p) |
| 3966 | || (hard_regno = ALLOCNO_HARD_REGNO (another_a)((another_a)->hard_regno)) < 0) |
| 3967 | continue; |
| 3968 | rclass = REGNO_REG_CLASS (hard_regno)(regclass_map[(hard_regno)]); |
| 3969 | i = ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[aclass][hard_regno]; |
| 3970 | if (i < 0) |
| 3971 | continue; |
| 3972 | cost = (cp->first == a |
| 3973 | ? ira_register_move_cost(this_target_ira_int->x_ira_register_move_cost)[mode][rclass][aclass] |
| 3974 | : ira_register_move_cost(this_target_ira_int->x_ira_register_move_cost)[mode][aclass][rclass]); |
| 3975 | ira_allocate_and_set_or_copy_costs |
| 3976 | (&ALLOCNO_UPDATED_HARD_REG_COSTS (a)((a)->updated_hard_reg_costs), aclass, ALLOCNO_CLASS_COST (a)((a)->class_cost), |
| 3977 | ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs)); |
| 3978 | ira_allocate_and_set_or_copy_costs |
| 3979 | (&ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a)((a)->updated_conflict_hard_reg_costs), |
| 3980 | aclass, 0, ALLOCNO_CONFLICT_HARD_REG_COSTS (a)((a)->conflict_hard_reg_costs)); |
| 3981 | ALLOCNO_UPDATED_HARD_REG_COSTS (a)((a)->updated_hard_reg_costs)[i] -= cp->freq * cost; |
| 3982 | ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a)((a)->updated_conflict_hard_reg_costs)[i] -= cp->freq * cost; |
| 3983 | } |
| 3984 | } |
| 3985 | |
| 3986 | /* Try to assign hard registers to the unassigned allocnos and |
| 3987 | allocnos conflicting with them or conflicting with allocnos whose |
| 3988 | regno >= START_REGNO. The function is called after ira_flattening, |
| 3989 | so more allocnos (including ones created in ira-emit.cc) will have a |
| 3990 | chance to get a hard register. We use simple assignment algorithm |
| 3991 | based on priorities. */ |
| 3992 | void |
| 3993 | ira_reassign_conflict_allocnos (int start_regno) |
| 3994 | { |
| 3995 | int i, allocnos_to_color_num; |
| 3996 | ira_allocno_t a; |
| 3997 | enum reg_class aclass; |
| 3998 | bitmap allocnos_to_color; |
| 3999 | ira_allocno_iterator ai; |
| 4000 | |
| 4001 | allocnos_to_color = ira_allocate_bitmap (); |
| 4002 | allocnos_to_color_num = 0; |
| 4003 | FOR_EACH_ALLOCNO (a, ai)for (ira_allocno_iter_init (&(ai)); ira_allocno_iter_cond (&(ai), &(a));) |
| 4004 | { |
| 4005 | int n = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 4006 | |
| 4007 | if (! ALLOCNO_ASSIGNED_P (a)((a)->assigned_p) |
| 4008 | && ! bitmap_bit_p (allocnos_to_color, ALLOCNO_NUM (a)((a)->num))) |
| 4009 | { |
| 4010 | if (ALLOCNO_CLASS (a)((a)->aclass) != NO_REGS) |
| 4011 | sorted_allocnos[allocnos_to_color_num++] = a; |
| 4012 | else |
| 4013 | { |
| 4014 | ALLOCNO_ASSIGNED_P (a)((a)->assigned_p) = true; |
| 4015 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = -1; |
| 4016 | ira_assert (ALLOCNO_UPDATED_HARD_REG_COSTS (a) == NULL)((void)(!(((a)->updated_hard_reg_costs) == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4016, __FUNCTION__), 0 : 0)); |
| 4017 | ira_assert (ALLOCNO_UPDATED_CONFLICT_HARD_REG_COSTS (a) == NULL)((void)(!(((a)->updated_conflict_hard_reg_costs) == nullptr ) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4017, __FUNCTION__), 0 : 0)); |
| 4018 | } |
| 4019 | bitmap_set_bit (allocnos_to_color, ALLOCNO_NUM (a)((a)->num)); |
| 4020 | } |
| 4021 | if (ALLOCNO_REGNO (a)((a)->regno) < start_regno |
| 4022 | || (aclass = ALLOCNO_CLASS (a)((a)->aclass)) == NO_REGS) |
| 4023 | continue; |
| 4024 | for (i = 0; i < n; i++) |
| 4025 | { |
| 4026 | ira_object_t obj = ALLOCNO_OBJECT (a, i)((a)->objects[i]); |
| 4027 | ira_object_t conflict_obj; |
| 4028 | ira_object_conflict_iterator oci; |
| 4029 | |
| 4030 | FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)for (ira_object_conflict_iter_init (&(oci), (obj)); ira_object_conflict_iter_cond (&(oci), &(conflict_obj));) |
| 4031 | { |
| 4032 | ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj)((conflict_obj)->allocno); |
| 4033 | |
| 4034 | ira_assert (ira_reg_classes_intersect_p((void)(!((this_target_ira->x_ira_reg_classes_intersect_p) [aclass][((conflict_a)->aclass)]) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4035, __FUNCTION__), 0 : 0)) |
| 4035 | [aclass][ALLOCNO_CLASS (conflict_a)])((void)(!((this_target_ira->x_ira_reg_classes_intersect_p) [aclass][((conflict_a)->aclass)]) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4035, __FUNCTION__), 0 : 0)); |
| 4036 | if (!bitmap_set_bit (allocnos_to_color, ALLOCNO_NUM (conflict_a)((conflict_a)->num))) |
| 4037 | continue; |
| 4038 | sorted_allocnos[allocnos_to_color_num++] = conflict_a; |
| 4039 | } |
| 4040 | } |
| 4041 | } |
| 4042 | ira_free_bitmap (allocnos_to_color); |
| 4043 | if (allocnos_to_color_num > 1) |
| 4044 | { |
| 4045 | setup_allocno_priorities (sorted_allocnos, allocnos_to_color_num); |
| 4046 | qsort (sorted_allocnos, allocnos_to_color_num, sizeof (ira_allocno_t),gcc_qsort (sorted_allocnos, allocnos_to_color_num, sizeof (ira_allocno_t ), allocno_priority_compare_func) |
| 4047 | allocno_priority_compare_func)gcc_qsort (sorted_allocnos, allocnos_to_color_num, sizeof (ira_allocno_t ), allocno_priority_compare_func); |
| 4048 | } |
| 4049 | for (i = 0; i < allocnos_to_color_num; i++) |
| 4050 | { |
| 4051 | a = sorted_allocnos[i]; |
| 4052 | ALLOCNO_ASSIGNED_P (a)((a)->assigned_p) = false; |
| 4053 | update_curr_costs (a); |
| 4054 | } |
| 4055 | for (i = 0; i < allocnos_to_color_num; i++) |
| 4056 | { |
| 4057 | a = sorted_allocnos[i]; |
| 4058 | if (assign_hard_reg (a, true)) |
| 4059 | { |
| 4060 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 4061 | fprintf |
| 4062 | (ira_dump_file, |
| 4063 | " Secondary allocation: assign hard reg %d to reg %d\n", |
| 4064 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno), ALLOCNO_REGNO (a)((a)->regno)); |
| 4065 | } |
| 4066 | } |
| 4067 | } |
| 4068 | |
| 4069 | |
| 4070 | |
| 4071 | /* This page contains functions used to find conflicts using allocno |
| 4072 | live ranges. */ |
| 4073 | |
| 4074 | #ifdef ENABLE_IRA_CHECKING |
| 4075 | |
| 4076 | /* Return TRUE if live ranges of pseudo-registers REGNO1 and REGNO2 |
| 4077 | intersect. This should be used when there is only one region. |
| 4078 | Currently this is used during reload. */ |
| 4079 | static bool |
| 4080 | conflict_by_live_ranges_p (int regno1, int regno2) |
| 4081 | { |
| 4082 | ira_allocno_t a1, a2; |
| 4083 | |
| 4084 | ira_assert (regno1 >= FIRST_PSEUDO_REGISTER((void)(!(regno1 >= 76 && regno2 >= 76) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4085, __FUNCTION__), 0 : 0)) |
| 4085 | && regno2 >= FIRST_PSEUDO_REGISTER)((void)(!(regno1 >= 76 && regno2 >= 76) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4085, __FUNCTION__), 0 : 0)); |
| 4086 | /* Reg info calculated by dataflow infrastructure can be different |
| 4087 | from one calculated by regclass. */ |
| 4088 | if ((a1 = ira_loop_tree_root->regno_allocno_map[regno1]) == NULLnullptr |
| 4089 | || (a2 = ira_loop_tree_root->regno_allocno_map[regno2]) == NULLnullptr) |
| 4090 | return false; |
| 4091 | return allocnos_conflict_by_live_ranges_p (a1, a2); |
| 4092 | } |
| 4093 | |
| 4094 | #endif |
| 4095 | |
| 4096 | |
| 4097 | |
| 4098 | /* This page contains code to coalesce memory stack slots used by |
| 4099 | spilled allocnos. This results in smaller stack frame, better data |
| 4100 | locality, and in smaller code for some architectures like |
| 4101 | x86/x86_64 where insn size depends on address displacement value. |
| 4102 | On the other hand, it can worsen insn scheduling after the RA but |
| 4103 | in practice it is less important than smaller stack frames. */ |
| 4104 | |
| 4105 | /* TRUE if we coalesced some allocnos. In other words, if we got |
| 4106 | loops formed by members first_coalesced_allocno and |
| 4107 | next_coalesced_allocno containing more one allocno. */ |
| 4108 | static bool allocno_coalesced_p; |
| 4109 | |
| 4110 | /* Bitmap used to prevent a repeated allocno processing because of |
| 4111 | coalescing. */ |
| 4112 | static bitmap processed_coalesced_allocno_bitmap; |
| 4113 | |
| 4114 | /* See below. */ |
| 4115 | typedef struct coalesce_data *coalesce_data_t; |
| 4116 | |
| 4117 | /* To decrease footprint of ira_allocno structure we store all data |
| 4118 | needed only for coalescing in the following structure. */ |
| 4119 | struct coalesce_data |
| 4120 | { |
| 4121 | /* Coalesced allocnos form a cyclic list. One allocno given by |
| 4122 | FIRST represents all coalesced allocnos. The |
| 4123 | list is chained by NEXT. */ |
| 4124 | ira_allocno_t first; |
| 4125 | ira_allocno_t next; |
| 4126 | int temp; |
| 4127 | }; |
| 4128 | |
| 4129 | /* Container for storing allocno data concerning coalescing. */ |
| 4130 | static coalesce_data_t allocno_coalesce_data; |
| 4131 | |
| 4132 | /* Macro to access the data concerning coalescing. */ |
| 4133 | #define ALLOCNO_COALESCE_DATA(a)((coalesce_data_t) ((a)->add_data)) ((coalesce_data_t) ALLOCNO_ADD_DATA (a)((a)->add_data)) |
| 4134 | |
| 4135 | /* Merge two sets of coalesced allocnos given correspondingly by |
| 4136 | allocnos A1 and A2 (more accurately merging A2 set into A1 |
| 4137 | set). */ |
| 4138 | static void |
| 4139 | merge_allocnos (ira_allocno_t a1, ira_allocno_t a2) |
| 4140 | { |
| 4141 | ira_allocno_t a, first, last, next; |
| 4142 | |
| 4143 | first = ALLOCNO_COALESCE_DATA (a1)((coalesce_data_t) ((a1)->add_data))->first; |
| 4144 | a = ALLOCNO_COALESCE_DATA (a2)((coalesce_data_t) ((a2)->add_data))->first; |
| 4145 | if (first == a) |
| 4146 | return; |
| 4147 | for (last = a2, a = ALLOCNO_COALESCE_DATA (a2)((coalesce_data_t) ((a2)->add_data))->next;; |
| 4148 | a = ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->next) |
| 4149 | { |
| 4150 | ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->first = first; |
| 4151 | if (a == a2) |
| 4152 | break; |
| 4153 | last = a; |
| 4154 | } |
| 4155 | next = allocno_coalesce_data[ALLOCNO_NUM (first)((first)->num)].next; |
| 4156 | allocno_coalesce_data[ALLOCNO_NUM (first)((first)->num)].next = a2; |
| 4157 | allocno_coalesce_data[ALLOCNO_NUM (last)((last)->num)].next = next; |
| 4158 | } |
| 4159 | |
| 4160 | /* Return TRUE if there are conflicting allocnos from two sets of |
| 4161 | coalesced allocnos given correspondingly by allocnos A1 and A2. We |
| 4162 | use live ranges to find conflicts because conflicts are represented |
| 4163 | only for allocnos of the same allocno class and during the reload |
| 4164 | pass we coalesce allocnos for sharing stack memory slots. */ |
| 4165 | static bool |
| 4166 | coalesced_allocno_conflict_p (ira_allocno_t a1, ira_allocno_t a2) |
| 4167 | { |
| 4168 | ira_allocno_t a, conflict_a; |
| 4169 | |
| 4170 | if (allocno_coalesced_p) |
| 4171 | { |
| 4172 | bitmap_clear (processed_coalesced_allocno_bitmap); |
| 4173 | for (a = ALLOCNO_COALESCE_DATA (a1)((coalesce_data_t) ((a1)->add_data))->next;; |
| 4174 | a = ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->next) |
| 4175 | { |
| 4176 | bitmap_set_bit (processed_coalesced_allocno_bitmap, ALLOCNO_NUM (a)((a)->num)); |
| 4177 | if (a == a1) |
| 4178 | break; |
| 4179 | } |
| 4180 | } |
| 4181 | for (a = ALLOCNO_COALESCE_DATA (a2)((coalesce_data_t) ((a2)->add_data))->next;; |
| 4182 | a = ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->next) |
| 4183 | { |
| 4184 | for (conflict_a = ALLOCNO_COALESCE_DATA (a1)((coalesce_data_t) ((a1)->add_data))->next;; |
| 4185 | conflict_a = ALLOCNO_COALESCE_DATA (conflict_a)((coalesce_data_t) ((conflict_a)->add_data))->next) |
| 4186 | { |
| 4187 | if (allocnos_conflict_by_live_ranges_p (a, conflict_a)) |
| 4188 | return true; |
| 4189 | if (conflict_a == a1) |
| 4190 | break; |
| 4191 | } |
| 4192 | if (a == a2) |
| 4193 | break; |
| 4194 | } |
| 4195 | return false; |
| 4196 | } |
| 4197 | |
| 4198 | /* The major function for aggressive allocno coalescing. We coalesce |
| 4199 | only spilled allocnos. If some allocnos have been coalesced, we |
| 4200 | set up flag allocno_coalesced_p. */ |
| 4201 | static void |
| 4202 | coalesce_allocnos (void) |
| 4203 | { |
| 4204 | ira_allocno_t a; |
| 4205 | ira_copy_t cp, next_cp; |
| 4206 | unsigned int j; |
| 4207 | int i, n, cp_num, regno; |
| 4208 | bitmap_iterator bi; |
| 4209 | |
| 4210 | cp_num = 0; |
| 4211 | /* Collect copies. */ |
| 4212 | EXECUTE_IF_SET_IN_BITMAP (coloring_allocno_bitmap, 0, j, bi)for (bmp_iter_set_init (&(bi), (coloring_allocno_bitmap), (0), &(j)); bmp_iter_set (&(bi), &(j)); bmp_iter_next (&(bi), &(j))) |
| 4213 | { |
| 4214 | a = ira_allocnos[j]; |
| 4215 | regno = ALLOCNO_REGNO (a)((a)->regno); |
| 4216 | if (! ALLOCNO_ASSIGNED_P (a)((a)->assigned_p) || ALLOCNO_HARD_REGNO (a)((a)->hard_regno) >= 0 |
| 4217 | || ira_equiv_no_lvalue_p (regno)) |
| 4218 | continue; |
| 4219 | for (cp = ALLOCNO_COPIES (a)((a)->allocno_copies); cp != NULLnullptr; cp = next_cp) |
| 4220 | { |
| 4221 | if (cp->first == a) |
| 4222 | { |
| 4223 | next_cp = cp->next_first_allocno_copy; |
| 4224 | regno = ALLOCNO_REGNO (cp->second)((cp->second)->regno); |
| 4225 | /* For priority coloring we coalesce allocnos only with |
| 4226 | the same allocno class not with intersected allocno |
| 4227 | classes as it were possible. It is done for |
| 4228 | simplicity. */ |
| 4229 | if ((cp->insn != NULLnullptr || cp->constraint_p) |
| 4230 | && ALLOCNO_ASSIGNED_P (cp->second)((cp->second)->assigned_p) |
| 4231 | && ALLOCNO_HARD_REGNO (cp->second)((cp->second)->hard_regno) < 0 |
| 4232 | && ! ira_equiv_no_lvalue_p (regno)) |
| 4233 | sorted_copies[cp_num++] = cp; |
| 4234 | } |
| 4235 | else if (cp->second == a) |
| 4236 | next_cp = cp->next_second_allocno_copy; |
| 4237 | else |
| 4238 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4238, __FUNCTION__)); |
| 4239 | } |
| 4240 | } |
| 4241 | qsort (sorted_copies, cp_num, sizeof (ira_copy_t), copy_freq_compare_func)gcc_qsort (sorted_copies, cp_num, sizeof (ira_copy_t), copy_freq_compare_func ); |
| 4242 | /* Coalesced copies, most frequently executed first. */ |
| 4243 | for (; cp_num != 0;) |
| 4244 | { |
| 4245 | for (i = 0; i < cp_num; i++) |
| 4246 | { |
| 4247 | cp = sorted_copies[i]; |
| 4248 | if (! coalesced_allocno_conflict_p (cp->first, cp->second)) |
| 4249 | { |
| 4250 | allocno_coalesced_p = true; |
| 4251 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 4252 | fprintf |
| 4253 | (ira_dump_file, |
| 4254 | " Coalescing copy %d:a%dr%d-a%dr%d (freq=%d)\n", |
| 4255 | cp->num, ALLOCNO_NUM (cp->first)((cp->first)->num), ALLOCNO_REGNO (cp->first)((cp->first)->regno), |
| 4256 | ALLOCNO_NUM (cp->second)((cp->second)->num), ALLOCNO_REGNO (cp->second)((cp->second)->regno), |
| 4257 | cp->freq); |
| 4258 | merge_allocnos (cp->first, cp->second); |
| 4259 | i++; |
| 4260 | break; |
| 4261 | } |
| 4262 | } |
| 4263 | /* Collect the rest of copies. */ |
| 4264 | for (n = 0; i < cp_num; i++) |
| 4265 | { |
| 4266 | cp = sorted_copies[i]; |
| 4267 | if (allocno_coalesce_data[ALLOCNO_NUM (cp->first)((cp->first)->num)].first |
| 4268 | != allocno_coalesce_data[ALLOCNO_NUM (cp->second)((cp->second)->num)].first) |
| 4269 | sorted_copies[n++] = cp; |
| 4270 | } |
| 4271 | cp_num = n; |
| 4272 | } |
| 4273 | } |
| 4274 | |
| 4275 | /* Usage cost and order number of coalesced allocno set to which |
| 4276 | given pseudo register belongs to. */ |
| 4277 | static int *regno_coalesced_allocno_cost; |
| 4278 | static int *regno_coalesced_allocno_num; |
| 4279 | |
| 4280 | /* Sort pseudos according frequencies of coalesced allocno sets they |
| 4281 | belong to (putting most frequently ones first), and according to |
| 4282 | coalesced allocno set order numbers. */ |
| 4283 | static int |
| 4284 | coalesced_pseudo_reg_freq_compare (const void *v1p, const void *v2p) |
| 4285 | { |
| 4286 | const int regno1 = *(const int *) v1p; |
| 4287 | const int regno2 = *(const int *) v2p; |
| 4288 | int diff; |
| 4289 | |
| 4290 | if ((diff = (regno_coalesced_allocno_cost[regno2] |
| 4291 | - regno_coalesced_allocno_cost[regno1])) != 0) |
| 4292 | return diff; |
| 4293 | if ((diff = (regno_coalesced_allocno_num[regno1] |
| 4294 | - regno_coalesced_allocno_num[regno2])) != 0) |
| 4295 | return diff; |
| 4296 | return regno1 - regno2; |
| 4297 | } |
| 4298 | |
| 4299 | /* Widest width in which each pseudo reg is referred to (via subreg). |
| 4300 | It is used for sorting pseudo registers. */ |
| 4301 | static machine_mode *regno_max_ref_mode; |
| 4302 | |
| 4303 | /* Sort pseudos according their slot numbers (putting ones with |
| 4304 | smaller numbers first, or last when the frame pointer is not |
| 4305 | needed). */ |
| 4306 | static int |
| 4307 | coalesced_pseudo_reg_slot_compare (const void *v1p, const void *v2p) |
| 4308 | { |
| 4309 | const int regno1 = *(const int *) v1p; |
| 4310 | const int regno2 = *(const int *) v2p; |
| 4311 | ira_allocno_t a1 = ira_regno_allocno_map[regno1]; |
| 4312 | ira_allocno_t a2 = ira_regno_allocno_map[regno2]; |
| 4313 | int diff, slot_num1, slot_num2; |
| 4314 | machine_mode mode1, mode2; |
| 4315 | |
| 4316 | if (a1 == NULLnullptr || ALLOCNO_HARD_REGNO (a1)((a1)->hard_regno) >= 0) |
| 4317 | { |
| 4318 | if (a2 == NULLnullptr || ALLOCNO_HARD_REGNO (a2)((a2)->hard_regno) >= 0) |
| 4319 | return regno1 - regno2; |
| 4320 | return 1; |
| 4321 | } |
| 4322 | else if (a2 == NULLnullptr || ALLOCNO_HARD_REGNO (a2)((a2)->hard_regno) >= 0) |
| 4323 | return -1; |
| 4324 | slot_num1 = -ALLOCNO_HARD_REGNO (a1)((a1)->hard_regno); |
| 4325 | slot_num2 = -ALLOCNO_HARD_REGNO (a2)((a2)->hard_regno); |
| 4326 | if ((diff = slot_num1 - slot_num2) != 0) |
| 4327 | return (frame_pointer_needed((&x_rtl)->frame_pointer_needed) |
| 4328 | || (!FRAME_GROWS_DOWNWARD1) == STACK_GROWS_DOWNWARD1 ? diff : -diff); |
| 4329 | mode1 = wider_subreg_mode (PSEUDO_REGNO_MODE (regno1)((machine_mode) (regno_reg_rtx[regno1])->mode), |
| 4330 | regno_max_ref_mode[regno1]); |
| 4331 | mode2 = wider_subreg_mode (PSEUDO_REGNO_MODE (regno2)((machine_mode) (regno_reg_rtx[regno2])->mode), |
| 4332 | regno_max_ref_mode[regno2]); |
| 4333 | if ((diff = compare_sizes_for_sort (GET_MODE_SIZE (mode2), |
| 4334 | GET_MODE_SIZE (mode1))) != 0) |
| 4335 | return diff; |
| 4336 | return regno1 - regno2; |
| 4337 | } |
| 4338 | |
| 4339 | /* Setup REGNO_COALESCED_ALLOCNO_COST and REGNO_COALESCED_ALLOCNO_NUM |
| 4340 | for coalesced allocno sets containing allocnos with their regnos |
| 4341 | given in array PSEUDO_REGNOS of length N. */ |
| 4342 | static void |
| 4343 | setup_coalesced_allocno_costs_and_nums (int *pseudo_regnos, int n) |
| 4344 | { |
| 4345 | int i, num, regno, cost; |
| 4346 | ira_allocno_t allocno, a; |
| 4347 | |
| 4348 | for (num = i = 0; i < n; i++) |
| 4349 | { |
| 4350 | regno = pseudo_regnos[i]; |
| 4351 | allocno = ira_regno_allocno_map[regno]; |
| 4352 | if (allocno == NULLnullptr) |
| 4353 | { |
| 4354 | regno_coalesced_allocno_cost[regno] = 0; |
| 4355 | regno_coalesced_allocno_num[regno] = ++num; |
| 4356 | continue; |
| 4357 | } |
| 4358 | if (ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->first != allocno) |
| 4359 | continue; |
| 4360 | num++; |
| 4361 | for (cost = 0, a = ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->next;; |
| 4362 | a = ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->next) |
| 4363 | { |
| 4364 | cost += ALLOCNO_FREQ (a)((a)->freq); |
| 4365 | if (a == allocno) |
| 4366 | break; |
| 4367 | } |
| 4368 | for (a = ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->next;; |
| 4369 | a = ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->next) |
| 4370 | { |
| 4371 | regno_coalesced_allocno_num[ALLOCNO_REGNO (a)((a)->regno)] = num; |
| 4372 | regno_coalesced_allocno_cost[ALLOCNO_REGNO (a)((a)->regno)] = cost; |
| 4373 | if (a == allocno) |
| 4374 | break; |
| 4375 | } |
| 4376 | } |
| 4377 | } |
| 4378 | |
| 4379 | /* Collect spilled allocnos representing coalesced allocno sets (the |
| 4380 | first coalesced allocno). The collected allocnos are returned |
| 4381 | through array SPILLED_COALESCED_ALLOCNOS. The function returns the |
| 4382 | number of the collected allocnos. The allocnos are given by their |
| 4383 | regnos in array PSEUDO_REGNOS of length N. */ |
| 4384 | static int |
| 4385 | collect_spilled_coalesced_allocnos (int *pseudo_regnos, int n, |
| 4386 | ira_allocno_t *spilled_coalesced_allocnos) |
| 4387 | { |
| 4388 | int i, num, regno; |
| 4389 | ira_allocno_t allocno; |
| 4390 | |
| 4391 | for (num = i = 0; i < n; i++) |
| 4392 | { |
| 4393 | regno = pseudo_regnos[i]; |
| 4394 | allocno = ira_regno_allocno_map[regno]; |
| 4395 | if (allocno == NULLnullptr || ALLOCNO_HARD_REGNO (allocno)((allocno)->hard_regno) >= 0 |
| 4396 | || ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->first != allocno) |
| 4397 | continue; |
| 4398 | spilled_coalesced_allocnos[num++] = allocno; |
| 4399 | } |
| 4400 | return num; |
| 4401 | } |
| 4402 | |
| 4403 | /* Array of live ranges of size IRA_ALLOCNOS_NUM. Live range for |
| 4404 | given slot contains live ranges of coalesced allocnos assigned to |
| 4405 | given slot. */ |
| 4406 | static live_range_t *slot_coalesced_allocnos_live_ranges; |
| 4407 | |
| 4408 | /* Return TRUE if coalesced allocnos represented by ALLOCNO has live |
| 4409 | ranges intersected with live ranges of coalesced allocnos assigned |
| 4410 | to slot with number N. */ |
| 4411 | static bool |
| 4412 | slot_coalesced_allocno_live_ranges_intersect_p (ira_allocno_t allocno, int n) |
| 4413 | { |
| 4414 | ira_allocno_t a; |
| 4415 | |
| 4416 | for (a = ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->next;; |
| 4417 | a = ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->next) |
| 4418 | { |
| 4419 | int i; |
| 4420 | int nr = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 4421 | gcc_assert (ALLOCNO_CAP_MEMBER (a) == NULL)((void)(!(((a)->cap_member) == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4421, __FUNCTION__), 0 : 0)); |
| 4422 | for (i = 0; i < nr; i++) |
| 4423 | { |
| 4424 | ira_object_t obj = ALLOCNO_OBJECT (a, i)((a)->objects[i]); |
| 4425 | |
| 4426 | if (ira_live_ranges_intersect_p |
| 4427 | (slot_coalesced_allocnos_live_ranges[n], |
| 4428 | OBJECT_LIVE_RANGES (obj)((obj)->live_ranges))) |
| 4429 | return true; |
| 4430 | } |
| 4431 | if (a == allocno) |
| 4432 | break; |
| 4433 | } |
| 4434 | return false; |
| 4435 | } |
| 4436 | |
| 4437 | /* Update live ranges of slot to which coalesced allocnos represented |
| 4438 | by ALLOCNO were assigned. */ |
| 4439 | static void |
| 4440 | setup_slot_coalesced_allocno_live_ranges (ira_allocno_t allocno) |
| 4441 | { |
| 4442 | int i, n; |
| 4443 | ira_allocno_t a; |
| 4444 | live_range_t r; |
| 4445 | |
| 4446 | n = ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->temp; |
| 4447 | for (a = ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->next;; |
| 4448 | a = ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->next) |
| 4449 | { |
| 4450 | int nr = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 4451 | gcc_assert (ALLOCNO_CAP_MEMBER (a) == NULL)((void)(!(((a)->cap_member) == nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4451, __FUNCTION__), 0 : 0)); |
| 4452 | for (i = 0; i < nr; i++) |
| 4453 | { |
| 4454 | ira_object_t obj = ALLOCNO_OBJECT (a, i)((a)->objects[i]); |
| 4455 | |
| 4456 | r = ira_copy_live_range_list (OBJECT_LIVE_RANGES (obj)((obj)->live_ranges)); |
| 4457 | slot_coalesced_allocnos_live_ranges[n] |
| 4458 | = ira_merge_live_ranges |
| 4459 | (slot_coalesced_allocnos_live_ranges[n], r); |
| 4460 | } |
| 4461 | if (a == allocno) |
| 4462 | break; |
| 4463 | } |
| 4464 | } |
| 4465 | |
| 4466 | /* We have coalesced allocnos involving in copies. Coalesce allocnos |
| 4467 | further in order to share the same memory stack slot. Allocnos |
| 4468 | representing sets of allocnos coalesced before the call are given |
| 4469 | in array SPILLED_COALESCED_ALLOCNOS of length NUM. Return TRUE if |
| 4470 | some allocnos were coalesced in the function. */ |
| 4471 | static bool |
| 4472 | coalesce_spill_slots (ira_allocno_t *spilled_coalesced_allocnos, int num) |
| 4473 | { |
| 4474 | int i, j, n, last_coalesced_allocno_num; |
| 4475 | ira_allocno_t allocno, a; |
| 4476 | bool merged_p = false; |
| 4477 | bitmap set_jump_crosses = regstat_get_setjmp_crosses (); |
| 4478 | |
| 4479 | slot_coalesced_allocnos_live_ranges |
| 4480 | = (live_range_t *) ira_allocate (sizeof (live_range_t) * ira_allocnos_num); |
| 4481 | memset (slot_coalesced_allocnos_live_ranges, 0, |
| 4482 | sizeof (live_range_t) * ira_allocnos_num); |
| 4483 | last_coalesced_allocno_num = 0; |
| 4484 | /* Coalesce non-conflicting spilled allocnos preferring most |
| 4485 | frequently used. */ |
| 4486 | for (i = 0; i < num; i++) |
| 4487 | { |
| 4488 | allocno = spilled_coalesced_allocnos[i]; |
| 4489 | if (ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->first != allocno |
| 4490 | || bitmap_bit_p (set_jump_crosses, ALLOCNO_REGNO (allocno)((allocno)->regno)) |
| 4491 | || ira_equiv_no_lvalue_p (ALLOCNO_REGNO (allocno)((allocno)->regno))) |
| 4492 | continue; |
| 4493 | for (j = 0; j < i; j++) |
| 4494 | { |
| 4495 | a = spilled_coalesced_allocnos[j]; |
| 4496 | n = ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->temp; |
| 4497 | if (ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->first == a |
| 4498 | && ! bitmap_bit_p (set_jump_crosses, ALLOCNO_REGNO (a)((a)->regno)) |
| 4499 | && ! ira_equiv_no_lvalue_p (ALLOCNO_REGNO (a)((a)->regno)) |
| 4500 | && ! slot_coalesced_allocno_live_ranges_intersect_p (allocno, n)) |
| 4501 | break; |
| 4502 | } |
| 4503 | if (j >= i) |
| 4504 | { |
| 4505 | /* No coalescing: set up number for coalesced allocnos |
| 4506 | represented by ALLOCNO. */ |
| 4507 | ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->temp = last_coalesced_allocno_num++; |
| 4508 | setup_slot_coalesced_allocno_live_ranges (allocno); |
| 4509 | } |
| 4510 | else |
| 4511 | { |
| 4512 | allocno_coalesced_p = true; |
| 4513 | merged_p = true; |
| 4514 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 4515 | fprintf (ira_dump_file, |
| 4516 | " Coalescing spilled allocnos a%dr%d->a%dr%d\n", |
| 4517 | ALLOCNO_NUM (allocno)((allocno)->num), ALLOCNO_REGNO (allocno)((allocno)->regno), |
| 4518 | ALLOCNO_NUM (a)((a)->num), ALLOCNO_REGNO (a)((a)->regno)); |
| 4519 | ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->temp |
| 4520 | = ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->temp; |
| 4521 | setup_slot_coalesced_allocno_live_ranges (allocno); |
| 4522 | merge_allocnos (a, allocno); |
| 4523 | ira_assert (ALLOCNO_COALESCE_DATA (a)->first == a)((void)(!(((coalesce_data_t) ((a)->add_data))->first == a) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4523, __FUNCTION__), 0 : 0)); |
| 4524 | } |
| 4525 | } |
| 4526 | for (i = 0; i < ira_allocnos_num; i++) |
| 4527 | ira_finish_live_range_list (slot_coalesced_allocnos_live_ranges[i]); |
| 4528 | ira_free (slot_coalesced_allocnos_live_ranges); |
| 4529 | return merged_p; |
| 4530 | } |
| 4531 | |
| 4532 | /* Sort pseudo-register numbers in array PSEUDO_REGNOS of length N for |
| 4533 | subsequent assigning stack slots to them in the reload pass. To do |
| 4534 | this we coalesce spilled allocnos first to decrease the number of |
| 4535 | memory-memory move insns. This function is called by the |
| 4536 | reload. */ |
| 4537 | void |
| 4538 | ira_sort_regnos_for_alter_reg (int *pseudo_regnos, int n, |
| 4539 | machine_mode *reg_max_ref_mode) |
| 4540 | { |
| 4541 | int max_regno = max_reg_num (); |
| 4542 | int i, regno, num, slot_num; |
| 4543 | ira_allocno_t allocno, a; |
| 4544 | ira_allocno_iterator ai; |
| 4545 | ira_allocno_t *spilled_coalesced_allocnos; |
| 4546 | |
| 4547 | ira_assert (! ira_use_lra_p)((void)(!(! ira_use_lra_p) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4547, __FUNCTION__), 0 : 0)); |
| 4548 | |
| 4549 | /* Set up allocnos can be coalesced. */ |
| 4550 | coloring_allocno_bitmap = ira_allocate_bitmap (); |
| 4551 | for (i = 0; i < n; i++) |
| 4552 | { |
| 4553 | regno = pseudo_regnos[i]; |
| 4554 | allocno = ira_regno_allocno_map[regno]; |
| 4555 | if (allocno != NULLnullptr) |
| 4556 | bitmap_set_bit (coloring_allocno_bitmap, ALLOCNO_NUM (allocno)((allocno)->num)); |
| 4557 | } |
| 4558 | allocno_coalesced_p = false; |
| 4559 | processed_coalesced_allocno_bitmap = ira_allocate_bitmap (); |
| 4560 | allocno_coalesce_data |
| 4561 | = (coalesce_data_t) ira_allocate (sizeof (struct coalesce_data) |
| 4562 | * ira_allocnos_num); |
| 4563 | /* Initialize coalesce data for allocnos. */ |
| 4564 | FOR_EACH_ALLOCNO (a, ai)for (ira_allocno_iter_init (&(ai)); ira_allocno_iter_cond (&(ai), &(a));) |
| 4565 | { |
| 4566 | ALLOCNO_ADD_DATA (a)((a)->add_data) = allocno_coalesce_data + ALLOCNO_NUM (a)((a)->num); |
| 4567 | ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->first = a; |
| 4568 | ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->next = a; |
| 4569 | } |
| 4570 | coalesce_allocnos (); |
| 4571 | ira_free_bitmap (coloring_allocno_bitmap); |
| 4572 | regno_coalesced_allocno_cost |
| 4573 | = (int *) ira_allocate (max_regno * sizeof (int)); |
| 4574 | regno_coalesced_allocno_num |
| 4575 | = (int *) ira_allocate (max_regno * sizeof (int)); |
| 4576 | memset (regno_coalesced_allocno_num, 0, max_regno * sizeof (int)); |
| 4577 | setup_coalesced_allocno_costs_and_nums (pseudo_regnos, n); |
| 4578 | /* Sort regnos according frequencies of the corresponding coalesced |
| 4579 | allocno sets. */ |
| 4580 | qsort (pseudo_regnos, n, sizeof (int), coalesced_pseudo_reg_freq_compare)gcc_qsort (pseudo_regnos, n, sizeof (int), coalesced_pseudo_reg_freq_compare ); |
| 4581 | spilled_coalesced_allocnos |
| 4582 | = (ira_allocno_t *) ira_allocate (ira_allocnos_num |
| 4583 | * sizeof (ira_allocno_t)); |
| 4584 | /* Collect allocnos representing the spilled coalesced allocno |
| 4585 | sets. */ |
| 4586 | num = collect_spilled_coalesced_allocnos (pseudo_regnos, n, |
| 4587 | spilled_coalesced_allocnos); |
| 4588 | if (flag_ira_share_spill_slotsglobal_options.x_flag_ira_share_spill_slots |
| 4589 | && coalesce_spill_slots (spilled_coalesced_allocnos, num)) |
| 4590 | { |
| 4591 | setup_coalesced_allocno_costs_and_nums (pseudo_regnos, n); |
| 4592 | qsort (pseudo_regnos, n, sizeof (int),gcc_qsort (pseudo_regnos, n, sizeof (int), coalesced_pseudo_reg_freq_compare ) |
| 4593 | coalesced_pseudo_reg_freq_compare)gcc_qsort (pseudo_regnos, n, sizeof (int), coalesced_pseudo_reg_freq_compare ); |
| 4594 | num = collect_spilled_coalesced_allocnos (pseudo_regnos, n, |
| 4595 | spilled_coalesced_allocnos); |
| 4596 | } |
| 4597 | ira_free_bitmap (processed_coalesced_allocno_bitmap); |
| 4598 | allocno_coalesced_p = false; |
| 4599 | /* Assign stack slot numbers to spilled allocno sets, use smaller |
| 4600 | numbers for most frequently used coalesced allocnos. -1 is |
| 4601 | reserved for dynamic search of stack slots for pseudos spilled by |
| 4602 | the reload. */ |
| 4603 | slot_num = 1; |
| 4604 | for (i = 0; i < num; i++) |
| 4605 | { |
| 4606 | allocno = spilled_coalesced_allocnos[i]; |
| 4607 | if (ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->first != allocno |
| 4608 | || ALLOCNO_HARD_REGNO (allocno)((allocno)->hard_regno) >= 0 |
| 4609 | || ira_equiv_no_lvalue_p (ALLOCNO_REGNO (allocno)((allocno)->regno))) |
| 4610 | continue; |
| 4611 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 4612 | fprintf (ira_dump_file, " Slot %d (freq,size):", slot_num); |
| 4613 | slot_num++; |
| 4614 | for (a = ALLOCNO_COALESCE_DATA (allocno)((coalesce_data_t) ((allocno)->add_data))->next;; |
| 4615 | a = ALLOCNO_COALESCE_DATA (a)((coalesce_data_t) ((a)->add_data))->next) |
| 4616 | { |
| 4617 | ira_assert (ALLOCNO_HARD_REGNO (a) < 0)((void)(!(((a)->hard_regno) < 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4617, __FUNCTION__), 0 : 0)); |
| 4618 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = -slot_num; |
| 4619 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 4620 | { |
| 4621 | machine_mode mode = wider_subreg_mode |
| 4622 | (PSEUDO_REGNO_MODE (ALLOCNO_REGNO (a))((machine_mode) (regno_reg_rtx[((a)->regno)])->mode), |
| 4623 | reg_max_ref_mode[ALLOCNO_REGNO (a)((a)->regno)]); |
| 4624 | fprintf (ira_dump_file, " a%dr%d(%d,", |
| 4625 | ALLOCNO_NUM (a)((a)->num), ALLOCNO_REGNO (a)((a)->regno), ALLOCNO_FREQ (a)((a)->freq)); |
| 4626 | print_dec (GET_MODE_SIZE (mode), ira_dump_file, SIGNED); |
| 4627 | fprintf (ira_dump_file, ")\n"); |
| 4628 | } |
| 4629 | |
| 4630 | if (a == allocno) |
| 4631 | break; |
| 4632 | } |
| 4633 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 4634 | fprintf (ira_dump_file, "\n"); |
| 4635 | } |
| 4636 | ira_spilled_reg_stack_slots_num = slot_num - 1; |
| 4637 | ira_free (spilled_coalesced_allocnos); |
| 4638 | /* Sort regnos according the slot numbers. */ |
| 4639 | regno_max_ref_mode = reg_max_ref_mode; |
| 4640 | qsort (pseudo_regnos, n, sizeof (int), coalesced_pseudo_reg_slot_compare)gcc_qsort (pseudo_regnos, n, sizeof (int), coalesced_pseudo_reg_slot_compare ); |
| 4641 | FOR_EACH_ALLOCNO (a, ai)for (ira_allocno_iter_init (&(ai)); ira_allocno_iter_cond (&(ai), &(a));) |
| 4642 | ALLOCNO_ADD_DATA (a)((a)->add_data) = NULLnullptr; |
| 4643 | ira_free (allocno_coalesce_data); |
| 4644 | ira_free (regno_coalesced_allocno_num); |
| 4645 | ira_free (regno_coalesced_allocno_cost); |
| 4646 | } |
| 4647 | |
| 4648 | |
| 4649 | |
| 4650 | /* This page contains code used by the reload pass to improve the |
| 4651 | final code. */ |
| 4652 | |
| 4653 | /* The function is called from reload to mark changes in the |
| 4654 | allocation of REGNO made by the reload. Remember that reg_renumber |
| 4655 | reflects the change result. */ |
| 4656 | void |
| 4657 | ira_mark_allocation_change (int regno) |
| 4658 | { |
| 4659 | ira_allocno_t a = ira_regno_allocno_map[regno]; |
| 4660 | int old_hard_regno, hard_regno, cost; |
| 4661 | enum reg_class aclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 4662 | |
| 4663 | ira_assert (a != NULL)((void)(!(a != nullptr) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4663, __FUNCTION__), 0 : 0)); |
| 4664 | hard_regno = reg_renumber[regno]; |
| 4665 | if ((old_hard_regno = ALLOCNO_HARD_REGNO (a)((a)->hard_regno)) == hard_regno) |
| 4666 | return; |
| 4667 | if (old_hard_regno < 0) |
| 4668 | cost = -ALLOCNO_MEMORY_COST (a)((a)->memory_cost); |
| 4669 | else |
| 4670 | { |
| 4671 | ira_assert (ira_class_hard_reg_index[aclass][old_hard_regno] >= 0)((void)(!((this_target_ira_int->x_ira_class_hard_reg_index )[aclass][old_hard_regno] >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4671, __FUNCTION__), 0 : 0)); |
| 4672 | cost = -(ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs) == NULLnullptr |
| 4673 | ? ALLOCNO_CLASS_COST (a)((a)->class_cost) |
| 4674 | : ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs) |
| 4675 | [ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[aclass][old_hard_regno]]); |
| 4676 | update_costs_from_copies (a, false, false); |
| 4677 | } |
| 4678 | ira_overall_cost -= cost; |
| 4679 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = hard_regno; |
| 4680 | if (hard_regno < 0) |
| 4681 | { |
| 4682 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = -1; |
| 4683 | cost += ALLOCNO_MEMORY_COST (a)((a)->memory_cost); |
| 4684 | } |
| 4685 | else if (ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[aclass][hard_regno] >= 0) |
| 4686 | { |
| 4687 | cost += (ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs) == NULLnullptr |
| 4688 | ? ALLOCNO_CLASS_COST (a)((a)->class_cost) |
| 4689 | : ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs) |
| 4690 | [ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index)[aclass][hard_regno]]); |
| 4691 | update_costs_from_copies (a, true, false); |
| 4692 | } |
| 4693 | else |
| 4694 | /* Reload changed class of the allocno. */ |
| 4695 | cost = 0; |
| 4696 | ira_overall_cost += cost; |
| 4697 | } |
| 4698 | |
| 4699 | /* This function is called when reload deletes memory-memory move. In |
| 4700 | this case we marks that the allocation of the corresponding |
| 4701 | allocnos should be not changed in future. Otherwise we risk to get |
| 4702 | a wrong code. */ |
| 4703 | void |
| 4704 | ira_mark_memory_move_deletion (int dst_regno, int src_regno) |
| 4705 | { |
| 4706 | ira_allocno_t dst = ira_regno_allocno_map[dst_regno]; |
| 4707 | ira_allocno_t src = ira_regno_allocno_map[src_regno]; |
| 4708 | |
| 4709 | ira_assert (dst != NULL && src != NULL((void)(!(dst != nullptr && src != nullptr && ((dst)->hard_regno) < 0 && ((src)->hard_regno ) < 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4711, __FUNCTION__), 0 : 0)) |
| 4710 | && ALLOCNO_HARD_REGNO (dst) < 0((void)(!(dst != nullptr && src != nullptr && ((dst)->hard_regno) < 0 && ((src)->hard_regno ) < 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4711, __FUNCTION__), 0 : 0)) |
| 4711 | && ALLOCNO_HARD_REGNO (src) < 0)((void)(!(dst != nullptr && src != nullptr && ((dst)->hard_regno) < 0 && ((src)->hard_regno ) < 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4711, __FUNCTION__), 0 : 0)); |
| 4712 | ALLOCNO_DONT_REASSIGN_P (dst)((dst)->dont_reassign_p) = true; |
| 4713 | ALLOCNO_DONT_REASSIGN_P (src)((src)->dont_reassign_p) = true; |
| 4714 | } |
| 4715 | |
| 4716 | /* Try to assign a hard register (except for FORBIDDEN_REGS) to |
| 4717 | allocno A and return TRUE in the case of success. */ |
| 4718 | static bool |
| 4719 | allocno_reload_assign (ira_allocno_t a, HARD_REG_SET forbidden_regs) |
| 4720 | { |
| 4721 | int hard_regno; |
| 4722 | enum reg_class aclass; |
| 4723 | int regno = ALLOCNO_REGNO (a)((a)->regno); |
| 4724 | HARD_REG_SET saved[2]; |
| 4725 | int i, n; |
| 4726 | |
| 4727 | n = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 4728 | for (i = 0; i < n; i++) |
| 4729 | { |
| 4730 | ira_object_t obj = ALLOCNO_OBJECT (a, i)((a)->objects[i]); |
| 4731 | saved[i] = OBJECT_TOTAL_CONFLICT_HARD_REGS (obj)((obj)->total_conflict_hard_regs); |
| 4732 | OBJECT_TOTAL_CONFLICT_HARD_REGS (obj)((obj)->total_conflict_hard_regs) |= forbidden_regs; |
| 4733 | if (! flag_caller_savesglobal_options.x_flag_caller_saves && ALLOCNO_CALLS_CROSSED_NUM (a)((a)->calls_crossed_num) != 0) |
| 4734 | OBJECT_TOTAL_CONFLICT_HARD_REGS (obj)((obj)->total_conflict_hard_regs) |= ira_need_caller_save_regs (a); |
| 4735 | } |
| 4736 | ALLOCNO_ASSIGNED_P (a)((a)->assigned_p) = false; |
| 4737 | aclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 4738 | update_curr_costs (a); |
| 4739 | assign_hard_reg (a, true); |
| 4740 | hard_regno = ALLOCNO_HARD_REGNO (a)((a)->hard_regno); |
| 4741 | reg_renumber[regno] = hard_regno; |
| 4742 | if (hard_regno < 0) |
| 4743 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = -1; |
| 4744 | else |
| 4745 | { |
| 4746 | ira_assert (ira_class_hard_reg_index[aclass][hard_regno] >= 0)((void)(!((this_target_ira_int->x_ira_class_hard_reg_index )[aclass][hard_regno] >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4746, __FUNCTION__), 0 : 0)); |
| 4747 | ira_overall_cost |
| 4748 | -= (ALLOCNO_MEMORY_COST (a)((a)->memory_cost) |
| 4749 | - (ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs) == NULLnullptr |
| 4750 | ? ALLOCNO_CLASS_COST (a)((a)->class_cost) |
| 4751 | : ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs)[ira_class_hard_reg_index(this_target_ira_int->x_ira_class_hard_reg_index) |
| 4752 | [aclass][hard_regno]])); |
| 4753 | if (ira_need_caller_save_p (a, hard_regno)) |
| 4754 | { |
| 4755 | ira_assert (flag_caller_saves)((void)(!(global_options.x_flag_caller_saves) ? fancy_abort ( "/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4755, __FUNCTION__), 0 : 0)); |
| 4756 | caller_save_needed = 1; |
| 4757 | } |
| 4758 | } |
| 4759 | |
| 4760 | /* If we found a hard register, modify the RTL for the pseudo |
| 4761 | register to show the hard register, and mark the pseudo register |
| 4762 | live. */ |
| 4763 | if (reg_renumber[regno] >= 0) |
| 4764 | { |
| 4765 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 4766 | fprintf (ira_dump_file, ": reassign to %d\n", reg_renumber[regno]); |
| 4767 | SET_REGNO (regno_reg_rtx[regno], reg_renumber[regno])(df_ref_change_reg_with_loc (regno_reg_rtx[regno], reg_renumber [regno])); |
| 4768 | mark_home_live (regno); |
| 4769 | } |
| 4770 | else if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 4771 | fprintf (ira_dump_file, "\n"); |
| 4772 | for (i = 0; i < n; i++) |
| 4773 | { |
| 4774 | ira_object_t obj = ALLOCNO_OBJECT (a, i)((a)->objects[i]); |
| 4775 | OBJECT_TOTAL_CONFLICT_HARD_REGS (obj)((obj)->total_conflict_hard_regs) = saved[i]; |
| 4776 | } |
| 4777 | return reg_renumber[regno] >= 0; |
| 4778 | } |
| 4779 | |
| 4780 | /* Sort pseudos according their usage frequencies (putting most |
| 4781 | frequently ones first). */ |
| 4782 | static int |
| 4783 | pseudo_reg_compare (const void *v1p, const void *v2p) |
| 4784 | { |
| 4785 | int regno1 = *(const int *) v1p; |
| 4786 | int regno2 = *(const int *) v2p; |
| 4787 | int diff; |
| 4788 | |
| 4789 | if ((diff = REG_FREQ (regno2)(reg_info_p[regno2].freq) - REG_FREQ (regno1)(reg_info_p[regno1].freq)) != 0) |
| 4790 | return diff; |
| 4791 | return regno1 - regno2; |
| 4792 | } |
| 4793 | |
| 4794 | /* Try to allocate hard registers to SPILLED_PSEUDO_REGS (there are |
| 4795 | NUM of them) or spilled pseudos conflicting with pseudos in |
| 4796 | SPILLED_PSEUDO_REGS. Return TRUE and update SPILLED, if the |
| 4797 | allocation has been changed. The function doesn't use |
| 4798 | BAD_SPILL_REGS and hard registers in PSEUDO_FORBIDDEN_REGS and |
| 4799 | PSEUDO_PREVIOUS_REGS for the corresponding pseudos. The function |
| 4800 | is called by the reload pass at the end of each reload |
| 4801 | iteration. */ |
| 4802 | bool |
| 4803 | ira_reassign_pseudos (int *spilled_pseudo_regs, int num, |
| 4804 | HARD_REG_SET bad_spill_regs, |
| 4805 | HARD_REG_SET *pseudo_forbidden_regs, |
| 4806 | HARD_REG_SET *pseudo_previous_regs, |
| 4807 | bitmap spilled) |
| 4808 | { |
| 4809 | int i, n, regno; |
| 4810 | bool changed_p; |
| 4811 | ira_allocno_t a; |
| 4812 | HARD_REG_SET forbidden_regs; |
| 4813 | bitmap temp = BITMAP_ALLOCbitmap_alloc (NULLnullptr); |
| 4814 | |
| 4815 | /* Add pseudos which conflict with pseudos already in |
| 4816 | SPILLED_PSEUDO_REGS to SPILLED_PSEUDO_REGS. This is preferable |
| 4817 | to allocating in two steps as some of the conflicts might have |
| 4818 | a higher priority than the pseudos passed in SPILLED_PSEUDO_REGS. */ |
| 4819 | for (i = 0; i < num; i++) |
| 4820 | bitmap_set_bit (temp, spilled_pseudo_regs[i]); |
| 4821 | |
| 4822 | for (i = 0, n = num; i < n; i++) |
| 4823 | { |
| 4824 | int nr, j; |
| 4825 | int regno = spilled_pseudo_regs[i]; |
| 4826 | bitmap_set_bit (temp, regno); |
| 4827 | |
| 4828 | a = ira_regno_allocno_map[regno]; |
| 4829 | nr = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 4830 | for (j = 0; j < nr; j++) |
| 4831 | { |
| 4832 | ira_object_t conflict_obj; |
| 4833 | ira_object_t obj = ALLOCNO_OBJECT (a, j)((a)->objects[j]); |
| 4834 | ira_object_conflict_iterator oci; |
| 4835 | |
| 4836 | FOR_EACH_OBJECT_CONFLICT (obj, conflict_obj, oci)for (ira_object_conflict_iter_init (&(oci), (obj)); ira_object_conflict_iter_cond (&(oci), &(conflict_obj));) |
| 4837 | { |
| 4838 | ira_allocno_t conflict_a = OBJECT_ALLOCNO (conflict_obj)((conflict_obj)->allocno); |
| 4839 | if (ALLOCNO_HARD_REGNO (conflict_a)((conflict_a)->hard_regno) < 0 |
| 4840 | && ! ALLOCNO_DONT_REASSIGN_P (conflict_a)((conflict_a)->dont_reassign_p) |
| 4841 | && bitmap_set_bit (temp, ALLOCNO_REGNO (conflict_a)((conflict_a)->regno))) |
| 4842 | { |
| 4843 | spilled_pseudo_regs[num++] = ALLOCNO_REGNO (conflict_a)((conflict_a)->regno); |
| 4844 | /* ?!? This seems wrong. */ |
| 4845 | bitmap_set_bit (consideration_allocno_bitmap, |
| 4846 | ALLOCNO_NUM (conflict_a)((conflict_a)->num)); |
| 4847 | } |
| 4848 | } |
| 4849 | } |
| 4850 | } |
| 4851 | |
| 4852 | if (num > 1) |
| 4853 | qsort (spilled_pseudo_regs, num, sizeof (int), pseudo_reg_compare)gcc_qsort (spilled_pseudo_regs, num, sizeof (int), pseudo_reg_compare ); |
| 4854 | changed_p = false; |
| 4855 | /* Try to assign hard registers to pseudos from |
| 4856 | SPILLED_PSEUDO_REGS. */ |
| 4857 | for (i = 0; i < num; i++) |
| 4858 | { |
| 4859 | regno = spilled_pseudo_regs[i]; |
| 4860 | forbidden_regs = (bad_spill_regs |
| 4861 | | pseudo_forbidden_regs[regno] |
| 4862 | | pseudo_previous_regs[regno]); |
| 4863 | gcc_assert (reg_renumber[regno] < 0)((void)(!(reg_renumber[regno] < 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4863, __FUNCTION__), 0 : 0)); |
| 4864 | a = ira_regno_allocno_map[regno]; |
| 4865 | ira_mark_allocation_change (regno); |
| 4866 | ira_assert (reg_renumber[regno] < 0)((void)(!(reg_renumber[regno] < 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4866, __FUNCTION__), 0 : 0)); |
| 4867 | if (internal_flag_ira_verbose > 3 && ira_dump_file != NULLnullptr) |
| 4868 | fprintf (ira_dump_file, |
| 4869 | " Try Assign %d(a%d), cost=%d", regno, ALLOCNO_NUM (a)((a)->num), |
| 4870 | ALLOCNO_MEMORY_COST (a)((a)->memory_cost) |
| 4871 | - ALLOCNO_CLASS_COST (a)((a)->class_cost)); |
| 4872 | allocno_reload_assign (a, forbidden_regs); |
| 4873 | if (reg_renumber[regno] >= 0) |
| 4874 | { |
| 4875 | CLEAR_REGNO_REG_SET (spilled, regno)bitmap_clear_bit (spilled, regno); |
| 4876 | changed_p = true; |
| 4877 | } |
| 4878 | } |
| 4879 | BITMAP_FREE (temp)((void) (bitmap_obstack_free ((bitmap) temp), (temp) = (bitmap ) nullptr)); |
| 4880 | return changed_p; |
| 4881 | } |
| 4882 | |
| 4883 | /* The function is called by reload and returns already allocated |
| 4884 | stack slot (if any) for REGNO with given INHERENT_SIZE and |
| 4885 | TOTAL_SIZE. In the case of failure to find a slot which can be |
| 4886 | used for REGNO, the function returns NULL. */ |
| 4887 | rtx |
| 4888 | ira_reuse_stack_slot (int regno, poly_uint64 inherent_size, |
| 4889 | poly_uint64 total_size) |
| 4890 | { |
| 4891 | unsigned int i; |
| 4892 | int slot_num, best_slot_num; |
| 4893 | int cost, best_cost; |
| 4894 | ira_copy_t cp, next_cp; |
| 4895 | ira_allocno_t another_allocno, allocno = ira_regno_allocno_map[regno]; |
| 4896 | rtx x; |
| 4897 | bitmap_iterator bi; |
| 4898 | class ira_spilled_reg_stack_slot *slot = NULLnullptr; |
| 4899 | |
| 4900 | ira_assert (! ira_use_lra_p)((void)(!(! ira_use_lra_p) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4900, __FUNCTION__), 0 : 0)); |
| 4901 | |
| 4902 | ira_assert (known_eq (inherent_size, PSEUDO_REGNO_BYTES (regno))((void)(!((!maybe_ne (inherent_size, GET_MODE_SIZE (((machine_mode ) (regno_reg_rtx[regno])->mode)))) && (!maybe_lt ( total_size, inherent_size)) && ((allocno)->hard_regno ) < 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4904, __FUNCTION__), 0 : 0)) |
| 4903 | && known_le (inherent_size, total_size)((void)(!((!maybe_ne (inherent_size, GET_MODE_SIZE (((machine_mode ) (regno_reg_rtx[regno])->mode)))) && (!maybe_lt ( total_size, inherent_size)) && ((allocno)->hard_regno ) < 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4904, __FUNCTION__), 0 : 0)) |
| 4904 | && ALLOCNO_HARD_REGNO (allocno) < 0)((void)(!((!maybe_ne (inherent_size, GET_MODE_SIZE (((machine_mode ) (regno_reg_rtx[regno])->mode)))) && (!maybe_lt ( total_size, inherent_size)) && ((allocno)->hard_regno ) < 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4904, __FUNCTION__), 0 : 0)); |
| 4905 | if (! flag_ira_share_spill_slotsglobal_options.x_flag_ira_share_spill_slots) |
| 4906 | return NULL_RTX(rtx) 0; |
| 4907 | slot_num = -ALLOCNO_HARD_REGNO (allocno)((allocno)->hard_regno) - 2; |
| 4908 | if (slot_num != -1) |
| 4909 | { |
| 4910 | slot = &ira_spilled_reg_stack_slots[slot_num]; |
| 4911 | x = slot->mem; |
| 4912 | } |
| 4913 | else |
| 4914 | { |
| 4915 | best_cost = best_slot_num = -1; |
| 4916 | x = NULL_RTX(rtx) 0; |
| 4917 | /* It means that the pseudo was spilled in the reload pass, try |
| 4918 | to reuse a slot. */ |
| 4919 | for (slot_num = 0; |
| 4920 | slot_num < ira_spilled_reg_stack_slots_num; |
| 4921 | slot_num++) |
| 4922 | { |
| 4923 | slot = &ira_spilled_reg_stack_slots[slot_num]; |
| 4924 | if (slot->mem == NULL_RTX(rtx) 0) |
| 4925 | continue; |
| 4926 | if (maybe_lt (slot->width, total_size) |
| 4927 | || maybe_lt (GET_MODE_SIZE (GET_MODE (slot->mem)((machine_mode) (slot->mem)->mode)), inherent_size)) |
| 4928 | continue; |
| 4929 | |
| 4930 | EXECUTE_IF_SET_IN_BITMAP (&slot->spilled_regs,for (bmp_iter_set_init (&(bi), (&slot->spilled_regs ), (76), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 4931 | FIRST_PSEUDO_REGISTER, i, bi)for (bmp_iter_set_init (&(bi), (&slot->spilled_regs ), (76), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 4932 | { |
| 4933 | another_allocno = ira_regno_allocno_map[i]; |
| 4934 | if (allocnos_conflict_by_live_ranges_p (allocno, |
| 4935 | another_allocno)) |
| 4936 | goto cont; |
| 4937 | } |
| 4938 | for (cost = 0, cp = ALLOCNO_COPIES (allocno)((allocno)->allocno_copies); |
| 4939 | cp != NULLnullptr; |
| 4940 | cp = next_cp) |
| 4941 | { |
| 4942 | if (cp->first == allocno) |
| 4943 | { |
| 4944 | next_cp = cp->next_first_allocno_copy; |
| 4945 | another_allocno = cp->second; |
| 4946 | } |
| 4947 | else if (cp->second == allocno) |
| 4948 | { |
| 4949 | next_cp = cp->next_second_allocno_copy; |
| 4950 | another_allocno = cp->first; |
| 4951 | } |
| 4952 | else |
| 4953 | gcc_unreachable ()(fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4953, __FUNCTION__)); |
| 4954 | if (cp->insn == NULL_RTX(rtx) 0) |
| 4955 | continue; |
| 4956 | if (bitmap_bit_p (&slot->spilled_regs, |
| 4957 | ALLOCNO_REGNO (another_allocno)((another_allocno)->regno))) |
| 4958 | cost += cp->freq; |
| 4959 | } |
| 4960 | if (cost > best_cost) |
| 4961 | { |
| 4962 | best_cost = cost; |
| 4963 | best_slot_num = slot_num; |
| 4964 | } |
| 4965 | cont: |
| 4966 | ; |
| 4967 | } |
| 4968 | if (best_cost >= 0) |
| 4969 | { |
| 4970 | slot_num = best_slot_num; |
| 4971 | slot = &ira_spilled_reg_stack_slots[slot_num]; |
| 4972 | SET_REGNO_REG_SET (&slot->spilled_regs, regno)bitmap_set_bit (&slot->spilled_regs, regno); |
| 4973 | x = slot->mem; |
| 4974 | ALLOCNO_HARD_REGNO (allocno)((allocno)->hard_regno) = -slot_num - 2; |
| 4975 | } |
| 4976 | } |
| 4977 | if (x != NULL_RTX(rtx) 0) |
| 4978 | { |
| 4979 | ira_assert (known_ge (slot->width, total_size))((void)(!((!maybe_lt (slot->width, total_size))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4979, __FUNCTION__), 0 : 0)); |
| 4980 | #ifdef ENABLE_IRA_CHECKING |
| 4981 | EXECUTE_IF_SET_IN_BITMAP (&slot->spilled_regs,for (bmp_iter_set_init (&(bi), (&slot->spilled_regs ), (76), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 4982 | FIRST_PSEUDO_REGISTER, i, bi)for (bmp_iter_set_init (&(bi), (&slot->spilled_regs ), (76), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 4983 | { |
| 4984 | ira_assert (! conflict_by_live_ranges_p (regno, i))((void)(!(! conflict_by_live_ranges_p (regno, i)) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 4984, __FUNCTION__), 0 : 0)); |
| 4985 | } |
| 4986 | #endif |
| 4987 | SET_REGNO_REG_SET (&slot->spilled_regs, regno)bitmap_set_bit (&slot->spilled_regs, regno); |
| 4988 | if (internal_flag_ira_verbose > 3 && ira_dump_file) |
| 4989 | { |
| 4990 | fprintf (ira_dump_file, " Assigning %d(freq=%d) slot %d of", |
| 4991 | regno, REG_FREQ (regno)(reg_info_p[regno].freq), slot_num); |
| 4992 | EXECUTE_IF_SET_IN_BITMAP (&slot->spilled_regs,for (bmp_iter_set_init (&(bi), (&slot->spilled_regs ), (76), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 4993 | FIRST_PSEUDO_REGISTER, i, bi)for (bmp_iter_set_init (&(bi), (&slot->spilled_regs ), (76), &(i)); bmp_iter_set (&(bi), &(i)); bmp_iter_next (&(bi), &(i))) |
| 4994 | { |
| 4995 | if ((unsigned) regno != i) |
| 4996 | fprintf (ira_dump_file, " %d", i); |
| 4997 | } |
| 4998 | fprintf (ira_dump_file, "\n"); |
| 4999 | } |
| 5000 | } |
| 5001 | return x; |
| 5002 | } |
| 5003 | |
| 5004 | /* This is called by reload every time a new stack slot X with |
| 5005 | TOTAL_SIZE was allocated for REGNO. We store this info for |
| 5006 | subsequent ira_reuse_stack_slot calls. */ |
| 5007 | void |
| 5008 | ira_mark_new_stack_slot (rtx x, int regno, poly_uint64 total_size) |
| 5009 | { |
| 5010 | class ira_spilled_reg_stack_slot *slot; |
| 5011 | int slot_num; |
| 5012 | ira_allocno_t allocno; |
| 5013 | |
| 5014 | ira_assert (! ira_use_lra_p)((void)(!(! ira_use_lra_p) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 5014, __FUNCTION__), 0 : 0)); |
| 5015 | |
| 5016 | ira_assert (known_le (PSEUDO_REGNO_BYTES (regno), total_size))((void)(!((!maybe_lt (total_size, GET_MODE_SIZE (((machine_mode ) (regno_reg_rtx[regno])->mode))))) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 5016, __FUNCTION__), 0 : 0)); |
| 5017 | allocno = ira_regno_allocno_map[regno]; |
| 5018 | slot_num = -ALLOCNO_HARD_REGNO (allocno)((allocno)->hard_regno) - 2; |
| 5019 | if (slot_num == -1) |
| 5020 | { |
| 5021 | slot_num = ira_spilled_reg_stack_slots_num++; |
| 5022 | ALLOCNO_HARD_REGNO (allocno)((allocno)->hard_regno) = -slot_num - 2; |
| 5023 | } |
| 5024 | slot = &ira_spilled_reg_stack_slots[slot_num]; |
| 5025 | INIT_REG_SET (&slot->spilled_regs)bitmap_initialize (&slot->spilled_regs, ®_obstack ); |
| 5026 | SET_REGNO_REG_SET (&slot->spilled_regs, regno)bitmap_set_bit (&slot->spilled_regs, regno); |
| 5027 | slot->mem = x; |
| 5028 | slot->width = total_size; |
| 5029 | if (internal_flag_ira_verbose > 3 && ira_dump_file) |
| 5030 | fprintf (ira_dump_file, " Assigning %d(freq=%d) a new slot %d\n", |
| 5031 | regno, REG_FREQ (regno)(reg_info_p[regno].freq), slot_num); |
| 5032 | } |
| 5033 | |
| 5034 | |
| 5035 | /* Return spill cost for pseudo-registers whose numbers are in array |
| 5036 | REGNOS (with a negative number as an end marker) for reload with |
| 5037 | given IN and OUT for INSN. Return also number points (through |
| 5038 | EXCESS_PRESSURE_LIVE_LENGTH) where the pseudo-register lives and |
| 5039 | the register pressure is high, number of references of the |
| 5040 | pseudo-registers (through NREFS), the number of psuedo registers |
| 5041 | whose allocated register wouldn't need saving in the prologue |
| 5042 | (through CALL_USED_COUNT), and the first hard regno occupied by the |
| 5043 | pseudo-registers (through FIRST_HARD_REGNO). */ |
| 5044 | static int |
| 5045 | calculate_spill_cost (int *regnos, rtx in, rtx out, rtx_insn *insn, |
| 5046 | int *excess_pressure_live_length, |
| 5047 | int *nrefs, int *call_used_count, int *first_hard_regno) |
| 5048 | { |
| 5049 | int i, cost, regno, hard_regno, count, saved_cost; |
| 5050 | bool in_p, out_p; |
| 5051 | int length; |
| 5052 | ira_allocno_t a; |
| 5053 | |
| 5054 | *nrefs = 0; |
| 5055 | for (length = count = cost = i = 0;; i++) |
| 5056 | { |
| 5057 | regno = regnos[i]; |
| 5058 | if (regno < 0) |
| 5059 | break; |
| 5060 | *nrefs += REG_N_REFS (regno); |
| 5061 | hard_regno = reg_renumber[regno]; |
| 5062 | ira_assert (hard_regno >= 0)((void)(!(hard_regno >= 0) ? fancy_abort ("/buildworker/marxinbox-gcc-clang-static-analyzer/build/gcc/ira-color.cc" , 5062, __FUNCTION__), 0 : 0)); |
| 5063 | a = ira_regno_allocno_map[regno]; |
| 5064 | length += ALLOCNO_EXCESS_PRESSURE_POINTS_NUM (a)((a)->excess_pressure_points_num) / ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 5065 | cost += ALLOCNO_MEMORY_COST (a)((a)->memory_cost) - ALLOCNO_CLASS_COST (a)((a)->class_cost); |
| 5066 | if (in_hard_reg_set_p (crtl(&x_rtl)->abi->full_reg_clobbers (), |
| 5067 | ALLOCNO_MODE (a)((a)->mode), hard_regno)) |
| 5068 | count++; |
| 5069 | in_p = in && REG_P (in)(((enum rtx_code) (in)->code) == REG) && (int) REGNO (in)(rhs_regno(in)) == hard_regno; |
| 5070 | out_p = out && REG_P (out)(((enum rtx_code) (out)->code) == REG) && (int) REGNO (out)(rhs_regno(out)) == hard_regno; |
| 5071 | if ((in_p || out_p) |
| 5072 | && find_regno_note (insn, REG_DEAD, hard_regno) != NULL_RTX(rtx) 0) |
| 5073 | { |
| 5074 | saved_cost = 0; |
| 5075 | if (in_p) |
| 5076 | saved_cost += ira_memory_move_cost(this_target_ira->x_ira_memory_move_cost) |
| 5077 | [ALLOCNO_MODE (a)((a)->mode)][ALLOCNO_CLASS (a)((a)->aclass)][1]; |
| 5078 | if (out_p) |
| 5079 | saved_cost |
| 5080 | += ira_memory_move_cost(this_target_ira->x_ira_memory_move_cost) |
| 5081 | [ALLOCNO_MODE (a)((a)->mode)][ALLOCNO_CLASS (a)((a)->aclass)][0]; |
| 5082 | cost -= REG_FREQ_FROM_BB (BLOCK_FOR_INSN (insn))((optimize_function_for_size_p ((cfun + 0)) || !(cfun + 0)-> cfg->count_max.initialized_p ()) ? 1000 : ((BLOCK_FOR_INSN (insn))->count.to_frequency ((cfun + 0)) * 1000 / 10000) ? ((BLOCK_FOR_INSN (insn))->count.to_frequency ((cfun + 0)) * 1000 / 10000) : 1) * saved_cost; |
| 5083 | } |
| 5084 | } |
| 5085 | *excess_pressure_live_length = length; |
| 5086 | *call_used_count = count; |
| 5087 | hard_regno = -1; |
| 5088 | if (regnos[0] >= 0) |
| 5089 | { |
| 5090 | hard_regno = reg_renumber[regnos[0]]; |
| 5091 | } |
| 5092 | *first_hard_regno = hard_regno; |
| 5093 | return cost; |
| 5094 | } |
| 5095 | |
| 5096 | /* Return TRUE if spilling pseudo-registers whose numbers are in array |
| 5097 | REGNOS is better than spilling pseudo-registers with numbers in |
| 5098 | OTHER_REGNOS for reload with given IN and OUT for INSN. The |
| 5099 | function used by the reload pass to make better register spilling |
| 5100 | decisions. */ |
| 5101 | bool |
| 5102 | ira_better_spill_reload_regno_p (int *regnos, int *other_regnos, |
| 5103 | rtx in, rtx out, rtx_insn *insn) |
| 5104 | { |
| 5105 | int cost, other_cost; |
| 5106 | int length, other_length; |
| 5107 | int nrefs, other_nrefs; |
| 5108 | int call_used_count, other_call_used_count; |
| 5109 | int hard_regno, other_hard_regno; |
| 5110 | |
| 5111 | cost = calculate_spill_cost (regnos, in, out, insn, |
| 5112 | &length, &nrefs, &call_used_count, &hard_regno); |
| 5113 | other_cost = calculate_spill_cost (other_regnos, in, out, insn, |
| 5114 | &other_length, &other_nrefs, |
| 5115 | &other_call_used_count, |
| 5116 | &other_hard_regno); |
| 5117 | if (nrefs == 0 && other_nrefs != 0) |
| 5118 | return true; |
| 5119 | if (nrefs != 0 && other_nrefs == 0) |
| 5120 | return false; |
| 5121 | if (cost != other_cost) |
| 5122 | return cost < other_cost; |
| 5123 | if (length != other_length) |
| 5124 | return length > other_length; |
| 5125 | #ifdef REG_ALLOC_ORDER{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17 , 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48 , 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75 } |
| 5126 | if (hard_regno >= 0 && other_hard_regno >= 0) |
| 5127 | return (inv_reg_alloc_order(this_target_hard_regs->x_inv_reg_alloc_order)[hard_regno] |
| 5128 | < inv_reg_alloc_order(this_target_hard_regs->x_inv_reg_alloc_order)[other_hard_regno]); |
| 5129 | #else |
| 5130 | if (call_used_count != other_call_used_count) |
| 5131 | return call_used_count > other_call_used_count; |
| 5132 | #endif |
| 5133 | return false; |
| 5134 | } |
| 5135 | |
| 5136 | |
| 5137 | |
| 5138 | /* Allocate and initialize data necessary for assign_hard_reg. */ |
| 5139 | void |
| 5140 | ira_initiate_assign (void) |
| 5141 | { |
| 5142 | sorted_allocnos |
| 5143 | = (ira_allocno_t *) ira_allocate (sizeof (ira_allocno_t) |
| 5144 | * ira_allocnos_num); |
| 5145 | consideration_allocno_bitmap = ira_allocate_bitmap (); |
| 5146 | initiate_cost_update (); |
| 5147 | allocno_priorities = (int *) ira_allocate (sizeof (int) * ira_allocnos_num); |
| 5148 | sorted_copies = (ira_copy_t *) ira_allocate (ira_copies_num |
| 5149 | * sizeof (ira_copy_t)); |
| 5150 | } |
| 5151 | |
| 5152 | /* Deallocate data used by assign_hard_reg. */ |
| 5153 | void |
| 5154 | ira_finish_assign (void) |
| 5155 | { |
| 5156 | ira_free (sorted_allocnos); |
| 5157 | ira_free_bitmap (consideration_allocno_bitmap); |
| 5158 | finish_cost_update (); |
| 5159 | ira_free (allocno_priorities); |
| 5160 | ira_free (sorted_copies); |
| 5161 | } |
| 5162 | |
| 5163 | |
| 5164 | |
| 5165 | /* Entry function doing color-based register allocation. */ |
| 5166 | static void |
| 5167 | color (void) |
| 5168 | { |
| 5169 | allocno_stack_vec.create (ira_allocnos_num); |
| 5170 | memset (allocated_hardreg_p, 0, sizeof (allocated_hardreg_p)); |
| 5171 | ira_initiate_assign (); |
| 5172 | do_coloring (); |
| 5173 | ira_finish_assign (); |
| 5174 | allocno_stack_vec.release (); |
| 5175 | move_spill_restore (); |
| 5176 | } |
| 5177 | |
| 5178 | |
| 5179 | |
| 5180 | /* This page contains a simple register allocator without usage of |
| 5181 | allocno conflicts. This is used for fast allocation for -O0. */ |
| 5182 | |
| 5183 | /* Do register allocation by not using allocno conflicts. It uses |
| 5184 | only allocno live ranges. The algorithm is close to Chow's |
| 5185 | priority coloring. */ |
| 5186 | static void |
| 5187 | fast_allocation (void) |
| 5188 | { |
| 5189 | int i, j, k, num, class_size, hard_regno, best_hard_regno, cost, min_cost; |
| 5190 | int *costs; |
| 5191 | #ifdef STACK_REGS |
| 5192 | bool no_stack_reg_p; |
| 5193 | #endif |
| 5194 | enum reg_class aclass; |
| 5195 | machine_mode mode; |
| 5196 | ira_allocno_t a; |
| 5197 | ira_allocno_iterator ai; |
| 5198 | live_range_t r; |
| 5199 | HARD_REG_SET conflict_hard_regs, *used_hard_regs; |
| 5200 | |
| 5201 | sorted_allocnos = (ira_allocno_t *) ira_allocate (sizeof (ira_allocno_t) |
| 5202 | * ira_allocnos_num); |
| 5203 | num = 0; |
| 5204 | FOR_EACH_ALLOCNO (a, ai)for (ira_allocno_iter_init (&(ai)); ira_allocno_iter_cond (&(ai), &(a));) |
| 5205 | sorted_allocnos[num++] = a; |
| 5206 | allocno_priorities = (int *) ira_allocate (sizeof (int) * ira_allocnos_num); |
| 5207 | setup_allocno_priorities (sorted_allocnos, num); |
| 5208 | used_hard_regs = (HARD_REG_SET *) ira_allocate (sizeof (HARD_REG_SET) |
| 5209 | * ira_max_point); |
| 5210 | for (i = 0; i < ira_max_point; i++) |
| 5211 | CLEAR_HARD_REG_SET (used_hard_regs[i]); |
| 5212 | qsort (sorted_allocnos, num, sizeof (ira_allocno_t),gcc_qsort (sorted_allocnos, num, sizeof (ira_allocno_t), allocno_priority_compare_func ) |
| 5213 | allocno_priority_compare_func)gcc_qsort (sorted_allocnos, num, sizeof (ira_allocno_t), allocno_priority_compare_func ); |
| 5214 | for (i = 0; i < num; i++) |
| 5215 | { |
| 5216 | int nr, l; |
| 5217 | |
| 5218 | a = sorted_allocnos[i]; |
| 5219 | nr = ALLOCNO_NUM_OBJECTS (a)((a)->num_objects); |
| 5220 | CLEAR_HARD_REG_SET (conflict_hard_regs); |
| 5221 | for (l = 0; l < nr; l++) |
| 5222 | { |
| 5223 | ira_object_t obj = ALLOCNO_OBJECT (a, l)((a)->objects[l]); |
| 5224 | conflict_hard_regs |= OBJECT_CONFLICT_HARD_REGS (obj)((obj)->conflict_hard_regs); |
| 5225 | for (r = OBJECT_LIVE_RANGES (obj)((obj)->live_ranges); r != NULLnullptr; r = r->next) |
| 5226 | for (j = r->start; j <= r->finish; j++) |
| 5227 | conflict_hard_regs |= used_hard_regs[j]; |
| 5228 | } |
| 5229 | aclass = ALLOCNO_CLASS (a)((a)->aclass); |
| 5230 | ALLOCNO_ASSIGNED_P (a)((a)->assigned_p) = true; |
| 5231 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = -1; |
| 5232 | if (hard_reg_set_subset_p (reg_class_contents(this_target_hard_regs->x_reg_class_contents)[aclass], |
| 5233 | conflict_hard_regs)) |
| 5234 | continue; |
| 5235 | mode = ALLOCNO_MODE (a)((a)->mode); |
| 5236 | #ifdef STACK_REGS |
| 5237 | no_stack_reg_p = ALLOCNO_NO_STACK_REG_P (a)((a)->no_stack_reg_p); |
| 5238 | #endif |
| 5239 | class_size = ira_class_hard_regs_num(this_target_ira->x_ira_class_hard_regs_num)[aclass]; |
| 5240 | costs = ALLOCNO_HARD_REG_COSTS (a)((a)->hard_reg_costs); |
| 5241 | min_cost = INT_MAX2147483647; |
| 5242 | best_hard_regno = -1; |
| 5243 | for (j = 0; j < class_size; j++) |
| 5244 | { |
| 5245 | hard_regno = ira_class_hard_regs(this_target_ira->x_ira_class_hard_regs)[aclass][j]; |
| 5246 | #ifdef STACK_REGS |
| 5247 | if (no_stack_reg_p && FIRST_STACK_REG8 <= hard_regno |
| 5248 | && hard_regno <= LAST_STACK_REG15) |
| 5249 | continue; |
| 5250 | #endif |
| 5251 | if (ira_hard_reg_set_intersection_p (hard_regno, mode, conflict_hard_regs) |
| 5252 | || (TEST_HARD_REG_BIT |
| 5253 | (ira_prohibited_class_mode_regs(this_target_ira->x_ira_prohibited_class_mode_regs)[aclass][mode], hard_regno))) |
| 5254 | continue; |
| 5255 | if (costs == NULLnullptr) |
| 5256 | { |
| 5257 | best_hard_regno = hard_regno; |
| 5258 | break; |
| 5259 | } |
| 5260 | cost = costs[j]; |
| 5261 | if (min_cost > cost) |
| 5262 | { |
| 5263 | min_cost = cost; |
| 5264 | best_hard_regno = hard_regno; |
| 5265 | } |
| 5266 | } |
| 5267 | if (best_hard_regno < 0) |
| 5268 | continue; |
| 5269 | ALLOCNO_HARD_REGNO (a)((a)->hard_regno) = hard_regno = best_hard_regno; |
| 5270 | for (l = 0; l < nr; l++) |
| 5271 | { |
| 5272 | ira_object_t obj = ALLOCNO_OBJECT (a, l)((a)->objects[l]); |
| 5273 | for (r = OBJECT_LIVE_RANGES (obj)((obj)->live_ranges); r != NULLnullptr; r = r->next) |
| 5274 | for (k = r->start; k <= r->finish; k++) |
| 5275 | used_hard_regs[k] |= ira_reg_mode_hard_regset(this_target_ira_int->x_ira_reg_mode_hard_regset)[hard_regno][mode]; |
| 5276 | } |
| 5277 | } |
| 5278 | ira_free (sorted_allocnos); |
| 5279 | ira_free (used_hard_regs); |
| 5280 | ira_free (allocno_priorities); |
| 5281 | if (internal_flag_ira_verbose > 1 && ira_dump_file != NULLnullptr) |
| 5282 | ira_print_disposition (ira_dump_file); |
| 5283 | } |
| 5284 | |
| 5285 | |
| 5286 | |
| 5287 | /* Entry function doing coloring. */ |
| 5288 | void |
| 5289 | ira_color (void) |
| 5290 | { |
| 5291 | ira_allocno_t a; |
| 5292 | ira_allocno_iterator ai; |
| 5293 | |
| 5294 | /* Setup updated costs. */ |
| 5295 | FOR_EACH_ALLOCNO (a, ai)for (ira_allocno_iter_init (&(ai)); ira_allocno_iter_cond (&(ai), &(a));) |
| 5296 | { |
| 5297 | ALLOCNO_UPDATED_MEMORY_COST (a)((a)->updated_memory_cost) = ALLOCNO_MEMORY_COST (a)((a)->memory_cost); |
| 5298 | ALLOCNO_UPDATED_CLASS_COST (a)((a)->updated_class_cost) = ALLOCNO_CLASS_COST (a)((a)->class_cost); |
| 5299 | } |
| 5300 | if (ira_conflicts_p) |
| 5301 | color (); |
| 5302 | else |
| 5303 | fast_allocation (); |
| 5304 | } |