gcc/hooks.c

   1 /* General-purpose hooks.
   2    Copyright (C) 2002-2018 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_uint_mode_false (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_rtx_tree (rtx, tree)
 281 {
 282 }
 283
 284 void
 285 hook_void_constcharptr (const char *)
 286 {
 287 }
 288
 289 void
 290 hook_void_tree_treeptr (tree, tree *)
 291 {
 292 }
 293
 294 void
 295 hook_void_int_int (int, int)
 296 {
 297 }
 298
 299 bool
 300 hook_bool_tree_false (tree)
 301 {
 302   return false;
 303 }
 304
 305 bool
 306 hook_bool_const_tree_false (const_tree)
 307 {
 308   return false;
 309 }
 310
 311 bool
 312 hook_bool_tree_true (tree)
 313 {
 314   return true;
 315 }
 316
 317 bool
 318 hook_bool_const_tree_true (const_tree)
 319 {
 320   return true;
 321 }
 322
 323 bool
 324 hook_bool_tree_tree_false (tree, tree)
 325 {
 326   return false;
 327 }
 328
 329 bool
 330 hook_bool_tree_tree_true (tree, tree)
 331 {
 332   return true;
 333 }
 334
 335 bool
 336 hook_bool_tree_bool_false (tree, bool)
 337 {
 338   return false;
 339 }
 340
 341 bool
 342 hook_bool_rtx_insn_true (rtx_insn *)
 343 {
 344   return true;
 345 }
 346
 347 bool
 348 hook_bool_rtx_false (rtx)
 349 {
 350   return false;
 351 }
 352
 353 bool
 354 hook_bool_uintp_uintp_false (unsigned int *, unsigned int *)
 355 {
 356   return false;
 357 }
 358
 359 bool
 360 hook_bool_rtx_mode_int_int_intp_bool_false (rtx, machine_mode, int, int,
 361                                             int *, bool)
 362 {
 363   return false;
 364 }
 365
 366 bool
 367 hook_bool_wint_wint_uint_bool_true (const widest_int &, const widest_int &,
 368                                     unsigned int, bool)
 369 {
 370   return true;
 371 }
 372
 373 /* Generic hook that takes an rtx and returns it.  */
 374 rtx
 375 hook_rtx_rtx_identity (rtx x)
 376 {
 377   return x;
 378 }
 379
 380 /* Generic hook that takes an rtx and returns NULL_RTX.  */
 381 rtx
 382 hook_rtx_rtx_null (rtx)
 383 {
 384   return NULL;
 385 }
 386
 387 /* Generic hook that takes a tree and an int and returns NULL_RTX.  */
 388 rtx
 389 hook_rtx_tree_int_null (tree, int)
 390 {
 391   return NULL;
 392 }
 393
 394 /* Generic hook that takes a machine mode and returns an unsigned int 0.  */
 395 unsigned int
 396 hook_uint_mode_0 (machine_mode)
 397 {
 398   return 0;
 399 }
 400
 401 /* Generic hook that takes no arguments and returns a NULL const string.  */
 402 const char *
 403 hook_constcharptr_void_null (void)
 404 {
 405   return NULL;
 406 }
 407
 408 /* Generic hook that takes no arguments and returns a NULL string.  */
 409 char *
 410 hook_charptr_void_null (void)
 411 {
 412   return NULL;
 413 }
 414
 415 /* Generic hook that takes a tree and returns a NULL string.  */
 416 const char *
 417 hook_constcharptr_const_tree_null (const_tree)
 418 {
 419   return NULL;
 420 }
 421
 422 tree
 423 hook_tree_tree_int_treep_bool_null (tree, int, tree *, bool)
 424 {
 425   return NULL;
 426 }
 427
 428 tree
 429 hook_tree_tree_tree_null (tree, tree)
 430 {
 431   return NULL;
 432 }
 433
 434 tree
 435 hook_tree_tree_tree_tree_null (tree, tree, tree)
 436 {
 437   return NULL;
 438 }
 439
 440 /* Generic hook that takes an rtx_insn *and returns a NULL string.  */
 441 const char *
 442 hook_constcharptr_const_rtx_insn_null (const rtx_insn *)
 443 {
 444   return NULL;
 445 }
 446
 447 const char *
 448 hook_constcharptr_const_tree_const_tree_null (const_tree, const_tree)
 449 {
 450   return NULL;
 451 }
 452
 453 const char *
 454 hook_constcharptr_int_const_tree_null (int, const_tree)
 455 {
 456   return NULL;
 457 }
 458
 459 const char *
 460 hook_constcharptr_int_const_tree_const_tree_null (int, const_tree, const_tree)
 461 {
 462   return NULL;
 463 }
 464
 465 /* Generic hook that takes a const_tree and returns NULL_TREE.  */
 466 tree
 467 hook_tree_const_tree_null (const_tree)
 468 {
 469   return NULL;
 470 }
 471
 472 /* Generic hook that takes no arguments and returns a NULL_TREE.  */
 473 tree
 474 hook_tree_void_null (void)
 475 {
 476   return NULL;
 477 }
 478
 479 /* Generic hook that takes a rtx_insn * and an int and returns a bool.  */
 480
 481 bool
 482 hook_bool_rtx_insn_int_false (rtx_insn *, int)
 483 {
 484   return false;
 485 }
 486
 487 /* Generic hook that takes a rtx_insn * and an int and returns void.  */
 488
 489 void
 490 hook_void_rtx_insn_int (rtx_insn *, int)
 491 {
 492 }
 493
 494 /* Generic hook that takes a struct gcc_options * and returns void.  */
 495
 496 void
 497 hook_void_gcc_optionsp (struct gcc_options *)
 498 {
 499 }
 500
 501 /* Generic hook that takes an unsigned int, an unsigned int pointer and
 502    returns false.  */
 503
 504 bool
 505 hook_bool_uint_uintp_false (unsigned int, unsigned int *)
 506 {
 507   return false;
 508 }
 509
 510 /* Generic hook that takes a register class and returns false.  */
 511 bool
 512 hook_bool_reg_class_t_false (reg_class_t regclass ATTRIBUTE_UNUSED)
 513 {
 514   return false;
 515 }
 516
 517 /* Generic hook that takes 2 machine_modes and a register class and
 518    returns true.  */
 519 bool
 520 hook_bool_mode_mode_reg_class_t_true (machine_mode, machine_mode, reg_class_t)
 521 {
 522   return true;
 523 }
 524
 525 /* Generic hook that takes a machine_mode and 2 register classes
 526    and returns false.  */
 527 bool
 528 hook_bool_mode_reg_class_t_reg_class_t_false (machine_mode, reg_class_t,
 529                                               reg_class_t)
 530 {
 531   return false;
 532 }
 533
 534 /* Generic hook that takes a mode and an unsigned HOST_WIDE_INT and
 535    returns no mode.  */
 536
 537 opt_machine_mode
 538 hook_optmode_mode_uhwi_none (machine_mode, unsigned HOST_WIDE_INT)
 539 {
 540   return opt_machine_mode ();
 541 }