Mercurial > hg > CbC > CbC_gcc
annotate gcc/ira-conflicts.c @ 19:58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
| author | kent@firefly.cr.ie.u-ryukyu.ac.jp |
|---|---|
| date | Thu, 24 Sep 2009 13:21:57 +0900 |
| parents | a06113de4d67 |
| children | 77e2b8dfacca |
| rev | line source |
|---|---|
| 0 | 1 /* IRA conflict builder. |
| 2 Copyright (C) 2006, 2007, 2008, 2009 | |
| 3 Free Software Foundation, Inc. | |
| 4 Contributed by Vladimir Makarov <vmakarov@redhat.com>. | |
| 5 | |
| 6 This file is part of GCC. | |
| 7 | |
| 8 GCC is free software; you can redistribute it and/or modify it under | |
| 9 the terms of the GNU General Public License as published by the Free | |
| 10 Software Foundation; either version 3, or (at your option) any later | |
| 11 version. | |
| 12 | |
| 13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 for more details. | |
| 17 | |
| 18 You should have received a copy of the GNU General Public License | |
| 19 along with GCC; see the file COPYING3. If not see | |
| 20 <http://www.gnu.org/licenses/>. */ | |
| 21 | |
| 22 #include "config.h" | |
| 23 #include "system.h" | |
| 24 #include "coretypes.h" | |
| 25 #include "tm.h" | |
| 26 #include "regs.h" | |
| 27 #include "rtl.h" | |
| 28 #include "tm_p.h" | |
| 29 #include "target.h" | |
| 30 #include "flags.h" | |
| 31 #include "hard-reg-set.h" | |
| 32 #include "basic-block.h" | |
| 33 #include "insn-config.h" | |
| 34 #include "recog.h" | |
| 35 #include "toplev.h" | |
| 36 #include "params.h" | |
| 37 #include "df.h" | |
| 38 #include "sparseset.h" | |
| 39 #include "ira-int.h" | |
| 40 #include "addresses.h" | |
| 41 | |
| 42 /* This file contains code responsible for allocno conflict creation, | |
| 43 allocno copy creation and allocno info accumulation on upper level | |
| 44 regions. */ | |
| 45 | |
| 46 /* ira_allocnos_num array of arrays of bits, recording whether two | |
| 47 allocno's conflict (can't go in the same hardware register). | |
| 48 | |
| 49 Some arrays will be used as conflict bit vector of the | |
| 50 corresponding allocnos see function build_allocno_conflicts. */ | |
| 51 static IRA_INT_TYPE **conflicts; | |
| 52 | |
| 53 /* Macro to test a conflict of A1 and A2 in `conflicts'. */ | |
| 54 #define CONFLICT_ALLOCNO_P(A1, A2) \ | |
| 55 (ALLOCNO_MIN (A1) <= ALLOCNO_CONFLICT_ID (A2) \ | |
| 56 && ALLOCNO_CONFLICT_ID (A2) <= ALLOCNO_MAX (A1) \ | |
| 57 && TEST_ALLOCNO_SET_BIT (conflicts[ALLOCNO_NUM (A1)], \ | |
| 58 ALLOCNO_CONFLICT_ID (A2), \ | |
| 59 ALLOCNO_MIN (A1), \ | |
| 60 ALLOCNO_MAX (A1))) | |
| 61 | |
| 62 | |
| 63 | |
| 64 /* Build allocno conflict table by processing allocno live ranges. | |
| 65 Return true if the table was built. The table is not built if it | |
| 66 is too big. */ | |
| 67 static bool | |
| 68 build_conflict_bit_table (void) | |
| 69 { | |
| 70 int i, num, id, allocated_words_num, conflict_bit_vec_words_num; | |
| 71 unsigned int j; | |
| 72 enum reg_class cover_class; | |
| 73 ira_allocno_t allocno, live_a; | |
| 74 allocno_live_range_t r; | |
| 75 ira_allocno_iterator ai; | |
| 76 sparseset allocnos_live; | |
| 77 int allocno_set_words; | |
| 78 | |
| 79 allocno_set_words = (ira_allocnos_num + IRA_INT_BITS - 1) / IRA_INT_BITS; | |
| 80 allocated_words_num = 0; | |
| 81 FOR_EACH_ALLOCNO (allocno, ai) | |
| 82 { | |
| 83 if (ALLOCNO_MAX (allocno) < ALLOCNO_MIN (allocno)) | |
| 84 continue; | |
| 85 conflict_bit_vec_words_num | |
| 86 = ((ALLOCNO_MAX (allocno) - ALLOCNO_MIN (allocno) + IRA_INT_BITS) | |
| 87 / IRA_INT_BITS); | |
| 88 allocated_words_num += conflict_bit_vec_words_num; | |
| 89 if ((unsigned long long) allocated_words_num * sizeof (IRA_INT_TYPE) | |
| 90 > (unsigned long long) IRA_MAX_CONFLICT_TABLE_SIZE * 1024 * 1024) | |
| 91 { | |
| 92 if (internal_flag_ira_verbose > 0 && ira_dump_file != NULL) | |
| 93 fprintf | |
| 94 (ira_dump_file, | |
| 95 "+++Conflict table will be too big(>%dMB) -- don't use it\n", | |
| 96 IRA_MAX_CONFLICT_TABLE_SIZE); | |
| 97 return false; | |
| 98 } | |
| 99 } | |
| 100 allocnos_live = sparseset_alloc (ira_allocnos_num); | |
| 101 conflicts = (IRA_INT_TYPE **) ira_allocate (sizeof (IRA_INT_TYPE *) | |
| 102 * ira_allocnos_num); | |
| 103 allocated_words_num = 0; | |
| 104 FOR_EACH_ALLOCNO (allocno, ai) | |
| 105 { | |
| 106 num = ALLOCNO_NUM (allocno); | |
| 107 if (ALLOCNO_MAX (allocno) < ALLOCNO_MIN (allocno)) | |
| 108 { | |
| 109 conflicts[num] = NULL; | |
| 110 continue; | |
| 111 } | |
| 112 conflict_bit_vec_words_num | |
| 113 = ((ALLOCNO_MAX (allocno) - ALLOCNO_MIN (allocno) + IRA_INT_BITS) | |
| 114 / IRA_INT_BITS); | |
| 115 allocated_words_num += conflict_bit_vec_words_num; | |
| 116 conflicts[num] | |
| 117 = (IRA_INT_TYPE *) ira_allocate (sizeof (IRA_INT_TYPE) | |
| 118 * conflict_bit_vec_words_num); | |
| 119 memset (conflicts[num], 0, | |
| 120 sizeof (IRA_INT_TYPE) * conflict_bit_vec_words_num); | |
| 121 } | |
| 122 if (internal_flag_ira_verbose > 0 && ira_dump_file != NULL) | |
| 123 fprintf | |
| 124 (ira_dump_file, | |
| 125 "+++Allocating %ld bytes for conflict table (uncompressed size %ld)\n", | |
| 126 (long) allocated_words_num * sizeof (IRA_INT_TYPE), | |
| 127 (long) allocno_set_words * ira_allocnos_num * sizeof (IRA_INT_TYPE)); | |
| 128 for (i = 0; i < ira_max_point; i++) | |
| 129 { | |
| 130 for (r = ira_start_point_ranges[i]; r != NULL; r = r->start_next) | |
| 131 { | |
| 132 allocno = r->allocno; | |
| 133 num = ALLOCNO_NUM (allocno); | |
| 134 id = ALLOCNO_CONFLICT_ID (allocno); | |
| 135 cover_class = ALLOCNO_COVER_CLASS (allocno); | |
| 136 sparseset_set_bit (allocnos_live, num); | |
| 137 EXECUTE_IF_SET_IN_SPARSESET (allocnos_live, j) | |
| 138 { | |
| 139 live_a = ira_allocnos[j]; | |
| 140 if (ira_reg_classes_intersect_p | |
| 141 [cover_class][ALLOCNO_COVER_CLASS (live_a)] | |
| 142 /* Don't set up conflict for the allocno with itself. */ | |
| 143 && num != (int) j) | |
| 144 { | |
| 145 SET_ALLOCNO_SET_BIT (conflicts[num], | |
| 146 ALLOCNO_CONFLICT_ID (live_a), | |
| 147 ALLOCNO_MIN (allocno), | |
| 148 ALLOCNO_MAX (allocno)); | |
| 149 SET_ALLOCNO_SET_BIT (conflicts[j], id, | |
| 150 ALLOCNO_MIN (live_a), | |
| 151 ALLOCNO_MAX (live_a)); | |
| 152 } | |
| 153 } | |
| 154 } | |
| 155 | |
| 156 for (r = ira_finish_point_ranges[i]; r != NULL; r = r->finish_next) | |
| 157 sparseset_clear_bit (allocnos_live, ALLOCNO_NUM (r->allocno)); | |
| 158 } | |
| 159 sparseset_free (allocnos_live); | |
| 160 return true; | |
| 161 } | |
| 162 | |
| 163 | |
| 164 | |
| 165 /* Return TRUE if the operand constraint STR is commutative. */ | |
| 166 static bool | |
| 167 commutative_constraint_p (const char *str) | |
| 168 { | |
| 169 bool ignore_p; | |
| 170 int c; | |
| 171 | |
| 172 for (ignore_p = false;;) | |
| 173 { | |
| 174 c = *str; | |
| 175 if (c == '\0') | |
| 176 break; | |
| 177 str += CONSTRAINT_LEN (c, str); | |
| 178 if (c == '#') | |
| 179 ignore_p = true; | |
| 180 else if (c == ',') | |
| 181 ignore_p = false; | |
| 182 else if (! ignore_p) | |
| 183 { | |
| 184 /* Usually `%' is the first constraint character but the | |
| 185 documentation does not require this. */ | |
| 186 if (c == '%') | |
| 187 return true; | |
| 188 } | |
| 189 } | |
| 190 return false; | |
| 191 } | |
| 192 | |
| 193 /* Return the number of the operand which should be the same in any | |
| 194 case as operand with number OP_NUM (or negative value if there is | |
| 195 no such operand). If USE_COMMUT_OP_P is TRUE, the function makes | |
| 196 temporarily commutative operand exchange before this. The function | |
| 197 takes only really possible alternatives into consideration. */ | |
| 198 static int | |
| 199 get_dup_num (int op_num, bool use_commut_op_p) | |
| 200 { | |
| 201 int curr_alt, c, original, dup; | |
| 202 bool ignore_p, commut_op_used_p; | |
| 203 const char *str; | |
| 204 rtx op; | |
| 205 | |
| 206 if (op_num < 0 || recog_data.n_alternatives == 0) | |
| 207 return -1; | |
| 208 op = recog_data.operand[op_num]; | |
| 209 commut_op_used_p = true; | |
| 210 if (use_commut_op_p) | |
| 211 { | |
| 212 if (commutative_constraint_p (recog_data.constraints[op_num])) | |
| 213 op_num++; | |
| 214 else if (op_num > 0 && commutative_constraint_p (recog_data.constraints | |
| 215 [op_num - 1])) | |
| 216 op_num--; | |
| 217 else | |
| 218 commut_op_used_p = false; | |
| 219 } | |
| 220 str = recog_data.constraints[op_num]; | |
| 221 for (ignore_p = false, original = -1, curr_alt = 0;;) | |
| 222 { | |
| 223 c = *str; | |
| 224 if (c == '\0') | |
| 225 break; | |
| 226 if (c == '#') | |
| 227 ignore_p = true; | |
| 228 else if (c == ',') | |
| 229 { | |
| 230 curr_alt++; | |
| 231 ignore_p = false; | |
| 232 } | |
| 233 else if (! ignore_p) | |
| 234 switch (c) | |
| 235 { | |
| 236 case 'X': | |
| 237 return -1; | |
| 238 | |
| 239 case 'm': | |
| 240 case 'o': | |
| 241 /* Accept a register which might be placed in memory. */ | |
| 242 return -1; | |
| 243 break; | |
| 244 | |
| 245 case 'V': | |
| 246 case '<': | |
| 247 case '>': | |
| 248 break; | |
| 249 | |
| 250 case 'p': | |
| 251 GO_IF_LEGITIMATE_ADDRESS (VOIDmode, op, win_p); | |
| 252 break; | |
| 253 | |
| 254 win_p: | |
| 255 return -1; | |
| 256 | |
| 257 case 'g': | |
| 258 return -1; | |
| 259 | |
| 260 case 'r': | |
| 261 case 'a': case 'b': case 'c': case 'd': case 'e': case 'f': | |
| 262 case 'h': case 'j': case 'k': case 'l': | |
| 263 case 'q': case 't': case 'u': | |
| 264 case 'v': case 'w': case 'x': case 'y': case 'z': | |
| 265 case 'A': case 'B': case 'C': case 'D': | |
| 266 case 'Q': case 'R': case 'S': case 'T': case 'U': | |
| 267 case 'W': case 'Y': case 'Z': | |
| 268 { | |
| 269 enum reg_class cl; | |
| 270 | |
| 271 cl = (c == 'r' | |
| 272 ? GENERAL_REGS : REG_CLASS_FROM_CONSTRAINT (c, str)); | |
| 273 if (cl != NO_REGS) | |
| 274 return -1; | |
| 275 #ifdef EXTRA_CONSTRAINT_STR | |
| 276 else if (EXTRA_CONSTRAINT_STR (op, c, str)) | |
| 277 return -1; | |
| 278 #endif | |
| 279 break; | |
| 280 } | |
| 281 | |
| 282 case '0': case '1': case '2': case '3': case '4': | |
| 283 case '5': case '6': case '7': case '8': case '9': | |
| 284 if (original != -1 && original != c) | |
| 285 return -1; | |
| 286 original = c; | |
| 287 break; | |
| 288 } | |
| 289 str += CONSTRAINT_LEN (c, str); | |
| 290 } | |
| 291 if (original == -1) | |
| 292 return -1; | |
| 293 dup = original - '0'; | |
| 294 if (use_commut_op_p) | |
| 295 { | |
| 296 if (commutative_constraint_p (recog_data.constraints[dup])) | |
| 297 dup++; | |
| 298 else if (dup > 0 | |
| 299 && commutative_constraint_p (recog_data.constraints[dup -1])) | |
| 300 dup--; | |
| 301 else if (! commut_op_used_p) | |
| 302 return -1; | |
| 303 } | |
| 304 return dup; | |
| 305 } | |
| 306 | |
| 307 /* Return the operand which should be, in any case, the same as | |
| 308 operand with number OP_NUM. If USE_COMMUT_OP_P is TRUE, the | |
| 309 function makes temporarily commutative operand exchange before | |
| 310 this. */ | |
| 311 static rtx | |
| 312 get_dup (int op_num, bool use_commut_op_p) | |
| 313 { | |
| 314 int n = get_dup_num (op_num, use_commut_op_p); | |
| 315 | |
| 316 if (n < 0) | |
| 317 return NULL_RTX; | |
| 318 else | |
| 319 return recog_data.operand[n]; | |
| 320 } | |
| 321 | |
| 322 /* Check that X is REG or SUBREG of REG. */ | |
| 323 #define REG_SUBREG_P(x) \ | |
| 324 (REG_P (x) || (GET_CODE (x) == SUBREG && REG_P (SUBREG_REG (x)))) | |
| 325 | |
| 326 /* Return X if X is a REG, otherwise it should be SUBREG of REG and | |
| 327 the function returns the reg in this case. *OFFSET will be set to | |
| 328 0 in the first case or the regno offset in the first case. */ | |
| 329 static rtx | |
| 330 go_through_subreg (rtx x, int *offset) | |
| 331 { | |
| 332 rtx reg; | |
| 333 | |
| 334 *offset = 0; | |
| 335 if (REG_P (x)) | |
| 336 return x; | |
| 337 ira_assert (GET_CODE (x) == SUBREG); | |
| 338 reg = SUBREG_REG (x); | |
| 339 ira_assert (REG_P (reg)); | |
| 340 if (REGNO (reg) < FIRST_PSEUDO_REGISTER) | |
| 341 *offset = subreg_regno_offset (REGNO (reg), GET_MODE (reg), | |
| 342 SUBREG_BYTE (x), GET_MODE (x)); | |
| 343 else | |
| 344 *offset = (SUBREG_BYTE (x) / REGMODE_NATURAL_SIZE (GET_MODE (x))); | |
| 345 return reg; | |
| 346 } | |
| 347 | |
| 348 /* Process registers REG1 and REG2 in move INSN with execution | |
| 349 frequency FREQ. The function also processes the registers in a | |
| 350 potential move insn (INSN == NULL in this case) with frequency | |
| 351 FREQ. The function can modify hard register costs of the | |
| 352 corresponding allocnos or create a copy involving the corresponding | |
| 353 allocnos. The function does nothing if the both registers are hard | |
| 354 registers. When nothing is changed, the function returns | |
| 355 FALSE. */ | |
| 356 static bool | |
| 357 process_regs_for_copy (rtx reg1, rtx reg2, bool constraint_p, | |
| 358 rtx insn, int freq) | |
| 359 { | |
| 360 int allocno_preferenced_hard_regno, cost, index, offset1, offset2; | |
| 361 bool only_regs_p; | |
| 362 ira_allocno_t a; | |
| 363 enum reg_class rclass, cover_class; | |
| 364 enum machine_mode mode; | |
| 365 ira_copy_t cp; | |
| 366 ira_loop_tree_node_t parent; | |
| 367 | |
| 368 gcc_assert (REG_SUBREG_P (reg1) && REG_SUBREG_P (reg2)); | |
| 369 only_regs_p = REG_P (reg1) && REG_P (reg2); | |
| 370 reg1 = go_through_subreg (reg1, &offset1); | |
| 371 reg2 = go_through_subreg (reg2, &offset2); | |
| 372 /* Set up hard regno preferenced by allocno. If allocno gets the | |
| 373 hard regno the copy (or potential move) insn will be removed. */ | |
| 374 if (HARD_REGISTER_P (reg1)) | |
| 375 { | |
| 376 if (HARD_REGISTER_P (reg2)) | |
| 377 return false; | |
| 378 allocno_preferenced_hard_regno = REGNO (reg1) + offset1 - offset2; | |
| 379 a = ira_curr_regno_allocno_map[REGNO (reg2)]; | |
| 380 } | |
| 381 else if (HARD_REGISTER_P (reg2)) | |
| 382 { | |
| 383 allocno_preferenced_hard_regno = REGNO (reg2) + offset2 - offset1; | |
| 384 a = ira_curr_regno_allocno_map[REGNO (reg1)]; | |
| 385 } | |
| 386 else if (!CONFLICT_ALLOCNO_P (ira_curr_regno_allocno_map[REGNO (reg1)], | |
| 387 ira_curr_regno_allocno_map[REGNO (reg2)]) | |
| 388 && offset1 == offset2) | |
| 389 { | |
| 390 cp = ira_add_allocno_copy (ira_curr_regno_allocno_map[REGNO (reg1)], | |
| 391 ira_curr_regno_allocno_map[REGNO (reg2)], | |
| 392 freq, constraint_p, insn, | |
| 393 ira_curr_loop_tree_node); | |
| 394 bitmap_set_bit (ira_curr_loop_tree_node->local_copies, cp->num); | |
| 395 return true; | |
| 396 } | |
| 397 else | |
| 398 return false; | |
| 399 if (! IN_RANGE (allocno_preferenced_hard_regno, 0, FIRST_PSEUDO_REGISTER - 1)) | |
| 400 /* Can not be tied. */ | |
| 401 return false; | |
| 402 rclass = REGNO_REG_CLASS (allocno_preferenced_hard_regno); | |
| 403 mode = ALLOCNO_MODE (a); | |
| 404 cover_class = ALLOCNO_COVER_CLASS (a); | |
| 405 if (only_regs_p && insn != NULL_RTX | |
| 406 && reg_class_size[rclass] <= (unsigned) CLASS_MAX_NREGS (rclass, mode)) | |
| 407 /* It is already taken into account in ira-costs.c. */ | |
| 408 return false; | |
| 409 index = ira_class_hard_reg_index[cover_class][allocno_preferenced_hard_regno]; | |
| 410 if (index < 0) | |
| 411 /* Can not be tied. It is not in the cover class. */ | |
| 412 return false; | |
| 413 if (HARD_REGISTER_P (reg1)) | |
|
19
58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
kent@firefly.cr.ie.u-ryukyu.ac.jp
parents:
0
diff
changeset
|
414 cost = ira_get_register_move_cost (mode, cover_class, rclass) * freq; |
| 0 | 415 else |
|
19
58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
kent@firefly.cr.ie.u-ryukyu.ac.jp
parents:
0
diff
changeset
|
416 cost = ira_get_register_move_cost (mode, rclass, cover_class) * freq; |
| 0 | 417 for (;;) |
| 418 { | |
| 419 ira_allocate_and_set_costs | |
| 420 (&ALLOCNO_HARD_REG_COSTS (a), cover_class, | |
| 421 ALLOCNO_COVER_CLASS_COST (a)); | |
| 422 ira_allocate_and_set_costs | |
| 423 (&ALLOCNO_CONFLICT_HARD_REG_COSTS (a), cover_class, 0); | |
| 424 ALLOCNO_HARD_REG_COSTS (a)[index] -= cost; | |
| 425 ALLOCNO_CONFLICT_HARD_REG_COSTS (a)[index] -= cost; | |
| 426 if (ALLOCNO_HARD_REG_COSTS (a)[index] < ALLOCNO_COVER_CLASS_COST (a)) | |
| 427 ALLOCNO_COVER_CLASS_COST (a) = ALLOCNO_HARD_REG_COSTS (a)[index]; | |
| 428 if (ALLOCNO_CAP (a) != NULL) | |
| 429 a = ALLOCNO_CAP (a); | |
| 430 else if ((parent = ALLOCNO_LOOP_TREE_NODE (a)->parent) == NULL | |
| 431 || (a = parent->regno_allocno_map[ALLOCNO_REGNO (a)]) == NULL) | |
| 432 break; | |
| 433 } | |
| 434 return true; | |
| 435 } | |
| 436 | |
| 437 /* Process all of the output registers of the current insn and | |
| 438 the input register REG (its operand number OP_NUM) which dies in the | |
| 439 insn as if there were a move insn between them with frequency | |
| 440 FREQ. */ | |
| 441 static void | |
| 442 process_reg_shuffles (rtx reg, int op_num, int freq) | |
| 443 { | |
| 444 int i; | |
| 445 rtx another_reg; | |
| 446 | |
| 447 gcc_assert (REG_SUBREG_P (reg)); | |
| 448 for (i = 0; i < recog_data.n_operands; i++) | |
| 449 { | |
| 450 another_reg = recog_data.operand[i]; | |
| 451 | |
| 452 if (!REG_SUBREG_P (another_reg) || op_num == i | |
| 453 || recog_data.operand_type[i] != OP_OUT) | |
| 454 continue; | |
| 455 | |
| 456 process_regs_for_copy (reg, another_reg, false, NULL_RTX, freq); | |
| 457 } | |
| 458 } | |
| 459 | |
| 460 /* Process INSN and create allocno copies if necessary. For example, | |
| 461 it might be because INSN is a pseudo-register move or INSN is two | |
| 462 operand insn. */ | |
| 463 static void | |
| 464 add_insn_allocno_copies (rtx insn) | |
| 465 { | |
| 466 rtx set, operand, dup; | |
| 467 const char *str; | |
| 468 bool commut_p, bound_p; | |
| 469 int i, j, freq; | |
| 470 | |
| 471 freq = REG_FREQ_FROM_BB (BLOCK_FOR_INSN (insn)); | |
| 472 if (freq == 0) | |
| 473 freq = 1; | |
| 474 if ((set = single_set (insn)) != NULL_RTX | |
| 475 && REG_SUBREG_P (SET_DEST (set)) && REG_SUBREG_P (SET_SRC (set)) | |
| 476 && ! side_effects_p (set) | |
| 477 && find_reg_note (insn, REG_DEAD, | |
| 478 REG_P (SET_SRC (set)) | |
| 479 ? SET_SRC (set) | |
| 480 : SUBREG_REG (SET_SRC (set))) != NULL_RTX) | |
| 481 process_regs_for_copy (SET_DEST (set), SET_SRC (set), false, insn, freq); | |
| 482 else | |
| 483 { | |
| 484 extract_insn (insn); | |
| 485 for (i = 0; i < recog_data.n_operands; i++) | |
| 486 { | |
| 487 operand = recog_data.operand[i]; | |
| 488 if (REG_SUBREG_P (operand) | |
| 489 && find_reg_note (insn, REG_DEAD, | |
| 490 REG_P (operand) | |
| 491 ? operand : SUBREG_REG (operand)) != NULL_RTX) | |
| 492 { | |
| 493 str = recog_data.constraints[i]; | |
| 494 while (*str == ' ' && *str == '\t') | |
| 495 str++; | |
| 496 bound_p = false; | |
| 497 for (j = 0, commut_p = false; j < 2; j++, commut_p = true) | |
| 498 if ((dup = get_dup (i, commut_p)) != NULL_RTX | |
| 499 && REG_SUBREG_P (dup) | |
| 500 && process_regs_for_copy (operand, dup, true, | |
| 501 NULL_RTX, freq)) | |
| 502 bound_p = true; | |
| 503 if (bound_p) | |
| 504 continue; | |
| 505 /* If an operand dies, prefer its hard register for the | |
| 506 output operands by decreasing the hard register cost | |
| 507 or creating the corresponding allocno copies. The | |
| 508 cost will not correspond to a real move insn cost, so | |
| 509 make the frequency smaller. */ | |
| 510 process_reg_shuffles (operand, i, freq < 8 ? 1 : freq / 8); | |
| 511 } | |
| 512 } | |
| 513 } | |
| 514 } | |
| 515 | |
| 516 /* Add copies originated from BB given by LOOP_TREE_NODE. */ | |
| 517 static void | |
| 518 add_copies (ira_loop_tree_node_t loop_tree_node) | |
| 519 { | |
| 520 basic_block bb; | |
| 521 rtx insn; | |
| 522 | |
| 523 bb = loop_tree_node->bb; | |
| 524 if (bb == NULL) | |
| 525 return; | |
| 526 FOR_BB_INSNS (bb, insn) | |
| 527 if (INSN_P (insn)) | |
| 528 add_insn_allocno_copies (insn); | |
| 529 } | |
| 530 | |
| 531 /* Propagate copies the corresponding allocnos on upper loop tree | |
| 532 level. */ | |
| 533 static void | |
| 534 propagate_copies (void) | |
| 535 { | |
| 536 ira_copy_t cp; | |
| 537 ira_copy_iterator ci; | |
| 538 ira_allocno_t a1, a2, parent_a1, parent_a2; | |
| 539 ira_loop_tree_node_t parent; | |
| 540 | |
| 541 FOR_EACH_COPY (cp, ci) | |
| 542 { | |
| 543 a1 = cp->first; | |
| 544 a2 = cp->second; | |
| 545 if (ALLOCNO_LOOP_TREE_NODE (a1) == ira_loop_tree_root) | |
| 546 continue; | |
| 547 ira_assert ((ALLOCNO_LOOP_TREE_NODE (a2) != ira_loop_tree_root)); | |
| 548 parent = ALLOCNO_LOOP_TREE_NODE (a1)->parent; | |
| 549 if ((parent_a1 = ALLOCNO_CAP (a1)) == NULL) | |
| 550 parent_a1 = parent->regno_allocno_map[ALLOCNO_REGNO (a1)]; | |
| 551 if ((parent_a2 = ALLOCNO_CAP (a2)) == NULL) | |
| 552 parent_a2 = parent->regno_allocno_map[ALLOCNO_REGNO (a2)]; | |
| 553 ira_assert (parent_a1 != NULL && parent_a2 != NULL); | |
| 554 if (! CONFLICT_ALLOCNO_P (parent_a1, parent_a2)) | |
| 555 ira_add_allocno_copy (parent_a1, parent_a2, cp->freq, | |
| 556 cp->constraint_p, cp->insn, cp->loop_tree_node); | |
| 557 } | |
| 558 } | |
| 559 | |
| 560 /* Array used to collect all conflict allocnos for given allocno. */ | |
| 561 static ira_allocno_t *collected_conflict_allocnos; | |
| 562 | |
| 563 /* Build conflict vectors or bit conflict vectors (whatever is more | |
| 564 profitable) for allocno A from the conflict table and propagate the | |
| 565 conflicts to upper level allocno. */ | |
| 566 static void | |
| 567 build_allocno_conflicts (ira_allocno_t a) | |
| 568 { | |
| 569 int i, px, parent_num; | |
| 570 int conflict_bit_vec_words_num; | |
| 571 ira_loop_tree_node_t parent; | |
| 572 ira_allocno_t parent_a, another_a, another_parent_a; | |
| 573 ira_allocno_t *vec; | |
| 574 IRA_INT_TYPE *allocno_conflicts; | |
| 575 ira_allocno_set_iterator asi; | |
| 576 | |
| 577 allocno_conflicts = conflicts[ALLOCNO_NUM (a)]; | |
| 578 px = 0; | |
| 579 FOR_EACH_ALLOCNO_IN_SET (allocno_conflicts, | |
| 580 ALLOCNO_MIN (a), ALLOCNO_MAX (a), i, asi) | |
| 581 { | |
| 582 another_a = ira_conflict_id_allocno_map[i]; | |
| 583 ira_assert (ira_reg_classes_intersect_p | |
| 584 [ALLOCNO_COVER_CLASS (a)][ALLOCNO_COVER_CLASS (another_a)]); | |
| 585 collected_conflict_allocnos[px++] = another_a; | |
| 586 } | |
| 587 if (ira_conflict_vector_profitable_p (a, px)) | |
| 588 { | |
| 589 ira_allocate_allocno_conflict_vec (a, px); | |
| 590 vec = (ira_allocno_t*) ALLOCNO_CONFLICT_ALLOCNO_ARRAY (a); | |
| 591 memcpy (vec, collected_conflict_allocnos, sizeof (ira_allocno_t) * px); | |
| 592 vec[px] = NULL; | |
| 593 ALLOCNO_CONFLICT_ALLOCNOS_NUM (a) = px; | |
| 594 } | |
| 595 else | |
| 596 { | |
| 597 ALLOCNO_CONFLICT_ALLOCNO_ARRAY (a) = conflicts[ALLOCNO_NUM (a)]; | |
| 598 if (ALLOCNO_MAX (a) < ALLOCNO_MIN (a)) | |
| 599 conflict_bit_vec_words_num = 0; | |
| 600 else | |
| 601 conflict_bit_vec_words_num | |
| 602 = ((ALLOCNO_MAX (a) - ALLOCNO_MIN (a) + IRA_INT_BITS) | |
| 603 / IRA_INT_BITS); | |
| 604 ALLOCNO_CONFLICT_ALLOCNO_ARRAY_SIZE (a) | |
| 605 = conflict_bit_vec_words_num * sizeof (IRA_INT_TYPE); | |
| 606 } | |
| 607 parent = ALLOCNO_LOOP_TREE_NODE (a)->parent; | |
| 608 if ((parent_a = ALLOCNO_CAP (a)) == NULL | |
| 609 && (parent == NULL | |
| 610 || (parent_a = parent->regno_allocno_map[ALLOCNO_REGNO (a)]) | |
| 611 == NULL)) | |
| 612 return; | |
| 613 ira_assert (parent != NULL); | |
| 614 ira_assert (ALLOCNO_COVER_CLASS (a) == ALLOCNO_COVER_CLASS (parent_a)); | |
| 615 parent_num = ALLOCNO_NUM (parent_a); | |
| 616 FOR_EACH_ALLOCNO_IN_SET (allocno_conflicts, | |
| 617 ALLOCNO_MIN (a), ALLOCNO_MAX (a), i, asi) | |
| 618 { | |
| 619 another_a = ira_conflict_id_allocno_map[i]; | |
| 620 ira_assert (ira_reg_classes_intersect_p | |
| 621 [ALLOCNO_COVER_CLASS (a)][ALLOCNO_COVER_CLASS (another_a)]); | |
| 622 if ((another_parent_a = ALLOCNO_CAP (another_a)) == NULL | |
| 623 && (another_parent_a = (parent->regno_allocno_map | |
| 624 [ALLOCNO_REGNO (another_a)])) == NULL) | |
| 625 continue; | |
| 626 ira_assert (ALLOCNO_NUM (another_parent_a) >= 0); | |
| 627 ira_assert (ALLOCNO_COVER_CLASS (another_a) | |
| 628 == ALLOCNO_COVER_CLASS (another_parent_a)); | |
| 629 SET_ALLOCNO_SET_BIT (conflicts[parent_num], | |
| 630 ALLOCNO_CONFLICT_ID (another_parent_a), | |
| 631 ALLOCNO_MIN (parent_a), | |
| 632 ALLOCNO_MAX (parent_a)); | |
| 633 } | |
| 634 } | |
| 635 | |
| 636 /* Build conflict vectors or bit conflict vectors (whatever is more | |
| 637 profitable) of all allocnos from the conflict table. */ | |
| 638 static void | |
| 639 build_conflicts (void) | |
| 640 { | |
| 641 int i; | |
| 642 ira_allocno_t a, cap; | |
| 643 | |
| 644 collected_conflict_allocnos | |
| 645 = (ira_allocno_t *) ira_allocate (sizeof (ira_allocno_t) | |
| 646 * ira_allocnos_num); | |
| 647 for (i = max_reg_num () - 1; i >= FIRST_PSEUDO_REGISTER; i--) | |
| 648 for (a = ira_regno_allocno_map[i]; | |
| 649 a != NULL; | |
| 650 a = ALLOCNO_NEXT_REGNO_ALLOCNO (a)) | |
| 651 { | |
| 652 build_allocno_conflicts (a); | |
| 653 for (cap = ALLOCNO_CAP (a); cap != NULL; cap = ALLOCNO_CAP (cap)) | |
| 654 build_allocno_conflicts (cap); | |
| 655 } | |
| 656 ira_free (collected_conflict_allocnos); | |
| 657 } | |
| 658 | |
| 659 | |
| 660 | |
| 661 /* Print hard reg set SET with TITLE to FILE. */ | |
| 662 static void | |
| 663 print_hard_reg_set (FILE *file, const char *title, HARD_REG_SET set) | |
| 664 { | |
| 665 int i, start; | |
| 666 | |
| 667 fprintf (file, title); | |
| 668 for (start = -1, i = 0; i < FIRST_PSEUDO_REGISTER; i++) | |
| 669 { | |
| 670 if (TEST_HARD_REG_BIT (set, i)) | |
| 671 { | |
| 672 if (i == 0 || ! TEST_HARD_REG_BIT (set, i - 1)) | |
| 673 start = i; | |
| 674 } | |
| 675 if (start >= 0 | |
| 676 && (i == FIRST_PSEUDO_REGISTER - 1 || ! TEST_HARD_REG_BIT (set, i))) | |
| 677 { | |
| 678 if (start == i - 1) | |
| 679 fprintf (file, " %d", start); | |
| 680 else if (start == i - 2) | |
| 681 fprintf (file, " %d %d", start, start + 1); | |
| 682 else | |
| 683 fprintf (file, " %d-%d", start, i - 1); | |
| 684 start = -1; | |
| 685 } | |
| 686 } | |
| 687 fprintf (file, "\n"); | |
| 688 } | |
| 689 | |
| 690 /* Print information about allocno or only regno (if REG_P) conflicts | |
| 691 to FILE. */ | |
| 692 static void | |
| 693 print_conflicts (FILE *file, bool reg_p) | |
| 694 { | |
| 695 ira_allocno_t a; | |
| 696 ira_allocno_iterator ai; | |
| 697 HARD_REG_SET conflicting_hard_regs; | |
| 698 | |
| 699 FOR_EACH_ALLOCNO (a, ai) | |
| 700 { | |
| 701 ira_allocno_t conflict_a; | |
| 702 ira_allocno_conflict_iterator aci; | |
| 703 basic_block bb; | |
| 704 | |
| 705 if (reg_p) | |
| 706 fprintf (file, ";; r%d", ALLOCNO_REGNO (a)); | |
| 707 else | |
| 708 { | |
| 709 fprintf (file, ";; a%d(r%d,", ALLOCNO_NUM (a), ALLOCNO_REGNO (a)); | |
| 710 if ((bb = ALLOCNO_LOOP_TREE_NODE (a)->bb) != NULL) | |
| 711 fprintf (file, "b%d", bb->index); | |
| 712 else | |
| 713 fprintf (file, "l%d", ALLOCNO_LOOP_TREE_NODE (a)->loop->num); | |
| 714 fprintf (file, ")"); | |
| 715 } | |
| 716 fprintf (file, " conflicts:"); | |
| 717 if (ALLOCNO_CONFLICT_ALLOCNO_ARRAY (a) != NULL) | |
| 718 FOR_EACH_ALLOCNO_CONFLICT (a, conflict_a, aci) | |
| 719 { | |
| 720 if (reg_p) | |
| 721 fprintf (file, " r%d,", ALLOCNO_REGNO (conflict_a)); | |
| 722 else | |
| 723 { | |
| 724 fprintf (file, " a%d(r%d,", ALLOCNO_NUM (conflict_a), | |
| 725 ALLOCNO_REGNO (conflict_a)); | |
| 726 if ((bb = ALLOCNO_LOOP_TREE_NODE (conflict_a)->bb) != NULL) | |
| 727 fprintf (file, "b%d)", bb->index); | |
| 728 else | |
| 729 fprintf (file, "l%d)", | |
| 730 ALLOCNO_LOOP_TREE_NODE (conflict_a)->loop->num); | |
| 731 } | |
| 732 } | |
| 733 COPY_HARD_REG_SET (conflicting_hard_regs, | |
| 734 ALLOCNO_TOTAL_CONFLICT_HARD_REGS (a)); | |
| 735 AND_COMPL_HARD_REG_SET (conflicting_hard_regs, ira_no_alloc_regs); | |
| 736 AND_HARD_REG_SET (conflicting_hard_regs, | |
| 737 reg_class_contents[ALLOCNO_COVER_CLASS (a)]); | |
| 738 print_hard_reg_set (file, "\n;; total conflict hard regs:", | |
| 739 conflicting_hard_regs); | |
| 740 COPY_HARD_REG_SET (conflicting_hard_regs, | |
| 741 ALLOCNO_CONFLICT_HARD_REGS (a)); | |
| 742 AND_COMPL_HARD_REG_SET (conflicting_hard_regs, ira_no_alloc_regs); | |
| 743 AND_HARD_REG_SET (conflicting_hard_regs, | |
| 744 reg_class_contents[ALLOCNO_COVER_CLASS (a)]); | |
| 745 print_hard_reg_set (file, ";; conflict hard regs:", | |
| 746 conflicting_hard_regs); | |
| 747 } | |
| 748 fprintf (file, "\n"); | |
| 749 } | |
| 750 | |
| 751 /* Print information about allocno or only regno (if REG_P) conflicts | |
| 752 to stderr. */ | |
| 753 void | |
| 754 ira_debug_conflicts (bool reg_p) | |
| 755 { | |
| 756 print_conflicts (stderr, reg_p); | |
| 757 } | |
| 758 | |
| 759 | |
| 760 | |
| 761 /* Entry function which builds allocno conflicts and allocno copies | |
| 762 and accumulate some allocno info on upper level regions. */ | |
| 763 void | |
| 764 ira_build_conflicts (void) | |
| 765 { | |
| 766 ira_allocno_t a; | |
| 767 ira_allocno_iterator ai; | |
| 768 HARD_REG_SET temp_hard_reg_set; | |
| 769 | |
| 770 if (ira_conflicts_p) | |
| 771 { | |
| 772 ira_conflicts_p = build_conflict_bit_table (); | |
| 773 if (ira_conflicts_p) | |
| 774 { | |
| 775 build_conflicts (); | |
| 776 ira_traverse_loop_tree (true, ira_loop_tree_root, NULL, add_copies); | |
| 777 /* We need finished conflict table for the subsequent call. */ | |
| 778 if (flag_ira_region == IRA_REGION_ALL | |
| 779 || flag_ira_region == IRA_REGION_MIXED) | |
| 780 propagate_copies (); | |
| 781 /* Now we can free memory for the conflict table (see function | |
| 782 build_allocno_conflicts for details). */ | |
| 783 FOR_EACH_ALLOCNO (a, ai) | |
| 784 { | |
| 785 if (ALLOCNO_CONFLICT_ALLOCNO_ARRAY (a) | |
| 786 != conflicts[ALLOCNO_NUM (a)]) | |
| 787 ira_free (conflicts[ALLOCNO_NUM (a)]); | |
| 788 } | |
| 789 ira_free (conflicts); | |
| 790 } | |
| 791 } | |
| 792 if (! CLASS_LIKELY_SPILLED_P (base_reg_class (VOIDmode, ADDRESS, SCRATCH))) | |
| 793 CLEAR_HARD_REG_SET (temp_hard_reg_set); | |
| 794 else | |
| 795 { | |
| 796 COPY_HARD_REG_SET (temp_hard_reg_set, | |
| 797 reg_class_contents[base_reg_class (VOIDmode, ADDRESS, SCRATCH)]); | |
| 798 AND_COMPL_HARD_REG_SET (temp_hard_reg_set, ira_no_alloc_regs); | |
| 799 AND_HARD_REG_SET (temp_hard_reg_set, call_used_reg_set); | |
| 800 } | |
| 801 FOR_EACH_ALLOCNO (a, ai) | |
| 802 { | |
| 803 reg_attrs *attrs; | |
| 804 tree decl; | |
| 805 | |
| 806 if ((! flag_caller_saves && ALLOCNO_CALLS_CROSSED_NUM (a) != 0) | |
| 807 /* For debugging purposes don't put user defined variables in | |
| 808 callee-clobbered registers. */ | |
|
19
58ad6c70ea60
update gcc from 4.4.0 to 4.4.1.
kent@firefly.cr.ie.u-ryukyu.ac.jp
parents:
0
diff
changeset
|
809 || (optimize == 0 |
| 0 | 810 && (attrs = REG_ATTRS (regno_reg_rtx [ALLOCNO_REGNO (a)])) != NULL |
| 811 && (decl = attrs->decl) != NULL | |
| 812 && VAR_OR_FUNCTION_DECL_P (decl) | |
| 813 && ! DECL_ARTIFICIAL (decl))) | |
| 814 { | |
| 815 IOR_HARD_REG_SET (ALLOCNO_TOTAL_CONFLICT_HARD_REGS (a), | |
| 816 call_used_reg_set); | |
| 817 IOR_HARD_REG_SET (ALLOCNO_CONFLICT_HARD_REGS (a), | |
| 818 call_used_reg_set); | |
| 819 } | |
| 820 else if (ALLOCNO_CALLS_CROSSED_NUM (a) != 0) | |
| 821 { | |
| 822 IOR_HARD_REG_SET (ALLOCNO_TOTAL_CONFLICT_HARD_REGS (a), | |
| 823 no_caller_save_reg_set); | |
| 824 IOR_HARD_REG_SET (ALLOCNO_TOTAL_CONFLICT_HARD_REGS (a), | |
| 825 temp_hard_reg_set); | |
| 826 IOR_HARD_REG_SET (ALLOCNO_CONFLICT_HARD_REGS (a), | |
| 827 no_caller_save_reg_set); | |
| 828 IOR_HARD_REG_SET (ALLOCNO_CONFLICT_HARD_REGS (a), | |
| 829 temp_hard_reg_set); | |
| 830 } | |
| 831 } | |
| 832 if (optimize && ira_conflicts_p | |
| 833 && internal_flag_ira_verbose > 2 && ira_dump_file != NULL) | |
| 834 print_conflicts (ira_dump_file, false); | |
| 835 } |