gcc/hooks.c

   1 /* General-purpose hooks.
   2    Copyright (C) 2002-2019 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify it
   5    under the terms of the GNU General Public License as published by the
   6    Free Software Foundation; either version 3, or (at your option) any
   7    later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; see the file COPYING3.  If not see
  16    <http://www.gnu.org/licenses/>.
  17
  18    In other words, you are welcome to use, share and improve this program.
  19    You are forbidden to forbid anyone else to use, share and improve
  20    what you give them.   Help stamp out software-hoarding!  */
  21
  22 /* This file contains generic hooks that can be used as defaults for
  23    target or language-dependent hook initializers.  */
  24
  25 #include "config.h"
  26 #include "system.h"
  27 #include "coretypes.h"
  28 #include "tm.h"
  29 #include "hooks.h"
  30
  31 /* Generic hook that does absolutely zappo.  */
  32 void
  33 hook_void_void (void)
  34 {
  35 }
  36
  37 /* Generic hook that takes no arguments and returns false.  */
  38 bool
  39 hook_bool_void_false (void)
  40 {
  41   return false;
  42 }
  43
  44 /* Generic hook that takes no arguments and returns true.  */
  45 bool
  46 hook_bool_void_true (void)
  47 {
  48   return true;
  49 }
  50
  51 /* Generic hook that takes (bool) and returns false.  */
  52 bool
  53 hook_bool_bool_false (bool)
  54 {
  55   return false;
  56 }
  57
  58 /* Generic hook that takes (bool, struct gcc_options *) and returns false.  */
  59 bool
  60 hook_bool_bool_gcc_optionsp_false (bool, struct gcc_options *)
  61 {
  62   return false;
  63 }
  64
  65 /* Generic hook that takes const int, const int) and returns true.  */
  66 bool hook_bool_const_int_const_int_true (const int, const int)
  67 {
  68   return true;
  69 }
  70
  71 /* Generic hook that takes (machine_mode) and returns false.  */
  72 bool
  73 hook_bool_mode_false (machine_mode)
  74 {
  75   return false;
  76 }
  77
  78 /* Generic hook that takes (machine_mode) and returns true.  */
  79 bool
  80 hook_bool_mode_true (machine_mode)
  81 {
  82   return true;
  83 }
  84
  85 /* Generic hook that takes (machine_mode, machine_mode) and returns true.  */
  86 bool
  87 hook_bool_mode_mode_true (machine_mode, machine_mode)
  88 {
  89   return true;
  90 }
  91
  92 /* Generic hook that takes (machine_mode, const_rtx) and returns false.  */
  93 bool
  94 hook_bool_mode_const_rtx_false (machine_mode, const_rtx)
  95 {
  96   return false;
  97 }
  98
  99 /* Generic hook that takes (machine_mode, const_rtx) and returns true.  */
 100 bool
 101 hook_bool_mode_const_rtx_true (machine_mode, const_rtx)
 102 {
 103   return true;
 104 }
 105
 106 /* Generic hook that takes (machine_mode, rtx) and returns false.  */
 107 bool
 108 hook_bool_mode_rtx_false (machine_mode, rtx)
 109 {
 110   return false;
 111 }
 112
 113 /* Generic hook that takes (machine_mode, rtx) and returns true.  */
 114 bool
 115 hook_bool_mode_rtx_true (machine_mode, rtx)
 116 {
 117   return true;
 118 }
 119
 120 /* Generic hook that takes (const rtx_insn *, const rtx_insn *) and returns true.  */
 121 bool
 122 hook_bool_const_rtx_insn_const_rtx_insn_true (const rtx_insn *,
 123                                               const rtx_insn *)
 124 {
 125   return true;
 126 }
 127
 128 /* Generic hook that takes (machine_mode, unsigned HOST_WIDE_INT)
 129    and returns false.  */
 130 bool
 131 hook_bool_mode_uhwi_false (machine_mode, unsigned HOST_WIDE_INT)
 132 {
 133   return false;
 134 }
 135
 136 /* Generic hook that takes (poly_uint64, poly_uint64) and returns true.  */
 137 bool
 138 hook_bool_puint64_puint64_true (poly_uint64, poly_uint64)
 139 {
 140   return true;
 141 }
 142
 143 /* Generic hook that takes (unsigned int, machine_mode) and returns false.  */
 144 bool
 145 hook_bool_insn_uint_mode_false (rtx_insn *, unsigned int, machine_mode)
 146 {
 147   return false;
 148 }
 149
 150 /* Generic hook that takes (unsigned int, machine_mode) and returns true.  */
 151 bool
 152 hook_bool_uint_mode_true (unsigned int, machine_mode)
 153 {
 154   return true;
 155 }
 156
 157 /* Generic hook that takes (FILE *, const char *) and does nothing.  */
 158 void
 159 hook_void_FILEptr_constcharptr (FILE *, const char *)
 160 {
 161 }
 162
 163 /* Generic hook that takes (FILE *, const char *, constr_tree *) and does
 164    nothing.  */
 165 void
 166 hook_void_FILEptr_constcharptr_const_tree (FILE *, const char *, const_tree)
 167 {
 168 }
 169
 170 /* Generic hook that takes (FILE *, rtx) and returns false.  */
 171 bool
 172 hook_bool_FILEptr_rtx_false (FILE *, rtx)
 173 {
 174   return false;
 175 }
 176
 177 /* Generic hook that takes (gimple_stmt_iterator *) and returns
 178    false.  */
 179 bool
 180 hook_bool_gsiptr_false (gimple_stmt_iterator *)
 181 {
 182   return false;
 183 }
 184
 185 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook.  */
 186 bool
 187 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree, HOST_WIDE_INT,
 188                                                HOST_WIDE_INT, const_tree)
 189 {
 190   return false;
 191 }
 192
 193 bool
 194 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree, HOST_WIDE_INT,
 195                                               HOST_WIDE_INT, const_tree)
 196 {
 197   return true;
 198 }
 199
 200 bool
 201 default_can_output_mi_thunk_no_vcall (const_tree, HOST_WIDE_INT,
 202                                       HOST_WIDE_INT c, const_tree)
 203 {
 204   return c == 0;
 205 }
 206
 207 int
 208 hook_int_uint_mode_1 (unsigned int, machine_mode)
 209 {
 210   return 1;
 211 }
 212
 213 int
 214 hook_int_const_tree_0 (const_tree)
 215 {
 216   return 0;
 217 }
 218
 219 /* ??? Used for comp_type_attributes, which ought to return bool.  */
 220 int
 221 hook_int_const_tree_const_tree_1 (const_tree, const_tree)
 222 {
 223   return 1;
 224 }
 225
 226 int
 227 hook_int_rtx_0 (rtx)
 228 {
 229   return 0;
 230 }
 231
 232 int
 233 hook_int_rtx_1 (rtx)
 234 {
 235   return 1;
 236 }
 237
 238 int
 239 hook_int_rtx_insn_0 (rtx_insn *)
 240 {
 241   return 0;
 242 }
 243
 244 int
 245 hook_int_rtx_insn_unreachable (rtx_insn *)
 246 {
 247   gcc_unreachable ();
 248 }
 249
 250 int
 251 hook_int_rtx_bool_0 (rtx, bool)
 252 {
 253   return 0;
 254 }
 255
 256 int
 257 hook_int_rtx_mode_as_bool_0 (rtx, machine_mode, addr_space_t, bool)
 258 {
 259   return 0;
 260 }
 261
 262 unsigned int
 263 hook_uint_void_0 (void)
 264 {
 265   return 0;
 266 }
 267
 268 HOST_WIDE_INT
 269 hook_hwi_void_0 (void)
 270 {
 271   return 0;
 272 }
 273
 274 void
 275 hook_void_tree (tree)
 276 {
 277 }
 278
 279 void
 280 hook_void_FILEptr_tree (FILE *, tree)
 281 {
 282 }
 283
 284 void
 285 hook_void_rtx_tree (rtx, tree)
 286 {
 287 }
 288
 289 void
 290 hook_void_constcharptr (const char *)
 291 {
 292 }
 293
 294 void
 295 hook_void_tree_treeptr (tree, tree *)
 296 {
 297 }
 298
 299 void
 300 hook_void_int_int (int, int)
 301 {
 302 }
 303
 304 bool
 305 hook_bool_tree_false (tree)
 306 {
 307   return false;
 308 }
 309
 310 bool
 311 hook_bool_const_tree_false (const_tree)
 312 {
 313   return false;
 314 }
 315
 316 bool
 317 hook_bool_tree_true (tree)
 318 {
 319   return true;
 320 }
 321
 322 bool
 323 hook_bool_const_tree_true (const_tree)
 324 {
 325   return true;
 326 }
 327
 328 bool
 329 hook_bool_tree_tree_false (tree, tree)
 330 {
 331   return false;
 332 }
 333
 334 bool
 335 hook_bool_tree_tree_true (tree, tree)
 336 {
 337   return true;
 338 }
 339
 340 bool
 341 hook_bool_tree_bool_false (tree, bool)
 342 {
 343   return false;
 344 }
 345
 346 bool
 347 hook_bool_rtx_insn_true (rtx_insn *)
 348 {
 349   return true;
 350 }
 351
 352 bool
 353 hook_bool_rtx_false (rtx)
 354 {
 355   return false;
 356 }
 357
 358 bool
 359 hook_bool_uintp_uintp_false (unsigned int *, unsigned int *)
 360 {
 361   return false;
 362 }
 363
 364 bool
 365 hook_bool_rtx_mode_int_int_intp_bool_false (rtx, machine_mode, int, int,
 366                                             int *, bool)
 367 {
 368   return false;
 369 }
 370
 371 bool
 372 hook_bool_wint_wint_uint_bool_true (const widest_int &, const widest_int &,
 373                                     unsigned int, bool)
 374 {
 375   return true;
 376 }
 377
 378 /* Generic hook that takes an rtx and returns it.  */
 379 rtx
 380 hook_rtx_rtx_identity (rtx x)
 381 {
 382   return x;
 383 }
 384
 385 /* Generic hook that takes an rtx and returns NULL_RTX.  */
 386 rtx
 387 hook_rtx_rtx_null (rtx)
 388 {
 389   return NULL;
 390 }
 391
 392 /* Generic hook that takes a tree and an int and returns NULL_RTX.  */
 393 rtx
 394 hook_rtx_tree_int_null (tree, int)
 395 {
 396   return NULL;
 397 }
 398
 399 /* Generic hook that takes a machine mode and returns an unsigned int 0.  */
 400 unsigned int
 401 hook_uint_mode_0 (machine_mode)
 402 {
 403   return 0;
 404 }
 405
 406 /* Generic hook that takes no arguments and returns a NULL const string.  */
 407 const char *
 408 hook_constcharptr_void_null (void)
 409 {
 410   return NULL;
 411 }
 412
 413 /* Generic hook that takes no arguments and returns a NULL string.  */
 414 char *
 415 hook_charptr_void_null (void)
 416 {
 417   return NULL;
 418 }
 419
 420 /* Generic hook that takes a tree and returns a NULL string.  */
 421 const char *
 422 hook_constcharptr_const_tree_null (const_tree)
 423 {
 424   return NULL;
 425 }
 426
 427 tree
 428 hook_tree_tree_int_treep_bool_null (tree, int, tree *, bool)
 429 {
 430   return NULL;
 431 }
 432
 433 tree
 434 hook_tree_tree_tree_null (tree, tree)
 435 {
 436   return NULL;
 437 }
 438
 439 tree
 440 hook_tree_tree_tree_tree_null (tree, tree, tree)
 441 {
 442   return NULL;
 443 }
 444
 445 /* Generic hook that takes an rtx_insn *and returns a NULL string.  */
 446 const char *
 447 hook_constcharptr_const_rtx_insn_null (const rtx_insn *)
 448 {
 449   return NULL;
 450 }
 451
 452 const char *
 453 hook_constcharptr_const_tree_const_tree_null (const_tree, const_tree)
 454 {
 455   return NULL;
 456 }
 457
 458 const char *
 459 hook_constcharptr_int_const_tree_null (int, const_tree)
 460 {
 461   return NULL;
 462 }
 463
 464 const char *
 465 hook_constcharptr_int_const_tree_const_tree_null (int, const_tree, const_tree)
 466 {
 467   return NULL;
 468 }
 469
 470 /* Generic hook that takes a const_tree and returns NULL_TREE.  */
 471 tree
 472 hook_tree_const_tree_null (const_tree)
 473 {
 474   return NULL;
 475 }
 476
 477 /* Generic hook that takes no arguments and returns a NULL_TREE.  */
 478 tree
 479 hook_tree_void_null (void)
 480 {
 481   return NULL;
 482 }
 483
 484 /* Generic hook that takes a rtx_insn * and an int and returns a bool.  */
 485
 486 bool
 487 hook_bool_rtx_insn_int_false (rtx_insn *, int)
 488 {
 489   return false;
 490 }
 491
 492 /* Generic hook that takes a rtx_insn * and an int and returns void.  */
 493
 494 void
 495 hook_void_rtx_insn_int (rtx_insn *, int)
 496 {
 497 }
 498
 499 /* Generic hook that takes a struct gcc_options * and returns void.  */
 500
 501 void
 502 hook_void_gcc_optionsp (struct gcc_options *)
 503 {
 504 }
 505
 506 /* Generic hook that takes an unsigned int, an unsigned int pointer and
 507    returns false.  */
 508
 509 bool
 510 hook_bool_uint_uintp_false (unsigned int, unsigned int *)
 511 {
 512   return false;
 513 }
 514
 515 /* Generic hook that takes a register class and returns false.  */
 516 bool
 517 hook_bool_reg_class_t_false (reg_class_t regclass ATTRIBUTE_UNUSED)
 518 {
 519   return false;
 520 }
 521
 522 /* Generic hook that takes 2 machine_modes and a register class and
 523    returns true.  */
 524 bool
 525 hook_bool_mode_mode_reg_class_t_true (machine_mode, machine_mode, reg_class_t)
 526 {
 527   return true;
 528 }
 529
 530 /* Generic hook that takes a machine_mode and 2 register classes
 531    and returns false.  */
 532 bool
 533 hook_bool_mode_reg_class_t_reg_class_t_false (machine_mode, reg_class_t,
 534                                               reg_class_t)
 535 {
 536   return false;
 537 }
 538
 539 /* Generic hook that takes a mode and an unsigned HOST_WIDE_INT and
 540    returns no mode.  */
 541
 542 opt_machine_mode
 543 hook_optmode_mode_uhwi_none (machine_mode, unsigned HOST_WIDE_INT)
 544 {
 545   return opt_machine_mode ();
 546 }