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_unreachable (rtx_insn *)
 240 {
 241   gcc_unreachable ();
 242 }
 243
 244 int
 245 hook_int_rtx_bool_0 (rtx, bool)
 246 {
 247   return 0;
 248 }
 249
 250 int
 251 hook_int_rtx_mode_as_bool_0 (rtx, machine_mode, addr_space_t, bool)
 252 {
 253   return 0;
 254 }
 255
 256 unsigned int
 257 hook_uint_void_0 (void)
 258 {
 259   return 0;
 260 }
 261
 262 HOST_WIDE_INT
 263 hook_hwi_void_0 (void)
 264 {
 265   return 0;
 266 }
 267
 268 void
 269 hook_void_tree (tree)
 270 {
 271 }
 272
 273 void
 274 hook_void_rtx_tree (rtx, tree)
 275 {
 276 }
 277
 278 void
 279 hook_void_constcharptr (const char *)
 280 {
 281 }
 282
 283 void
 284 hook_void_tree_treeptr (tree, tree *)
 285 {
 286 }
 287
 288 void
 289 hook_void_int_int (int, int)
 290 {
 291 }
 292
 293 bool
 294 hook_bool_tree_false (tree)
 295 {
 296   return false;
 297 }
 298
 299 bool
 300 hook_bool_const_tree_false (const_tree)
 301 {
 302   return false;
 303 }
 304
 305 bool
 306 hook_bool_tree_true (tree)
 307 {
 308   return true;
 309 }
 310
 311 bool
 312 hook_bool_const_tree_true (const_tree)
 313 {
 314   return true;
 315 }
 316
 317 bool
 318 hook_bool_tree_tree_false (tree, tree)
 319 {
 320   return false;
 321 }
 322
 323 bool
 324 hook_bool_tree_tree_true (tree, tree)
 325 {
 326   return true;
 327 }
 328
 329 bool
 330 hook_bool_tree_bool_false (tree, bool)
 331 {
 332   return false;
 333 }
 334
 335 bool
 336 hook_bool_rtx_insn_true (rtx_insn *)
 337 {
 338   return true;
 339 }
 340
 341 bool
 342 hook_bool_rtx_false (rtx)
 343 {
 344   return false;
 345 }
 346
 347 bool
 348 hook_bool_uintp_uintp_false (unsigned int *, unsigned int *)
 349 {
 350   return false;
 351 }
 352
 353 bool
 354 hook_bool_rtx_mode_int_int_intp_bool_false (rtx, machine_mode, int, int,
 355                                             int *, bool)
 356 {
 357   return false;
 358 }
 359
 360 bool
 361 hook_bool_wint_wint_uint_bool_true (const widest_int &, const widest_int &,
 362                                     unsigned int, bool)
 363 {
 364   return true;
 365 }
 366
 367 /* Generic hook that takes an rtx and returns it.  */
 368 rtx
 369 hook_rtx_rtx_identity (rtx x)
 370 {
 371   return x;
 372 }
 373
 374 /* Generic hook that takes an rtx and returns NULL_RTX.  */
 375 rtx
 376 hook_rtx_rtx_null (rtx)
 377 {
 378   return NULL;
 379 }
 380
 381 /* Generic hook that takes a tree and an int and returns NULL_RTX.  */
 382 rtx
 383 hook_rtx_tree_int_null (tree, int)
 384 {
 385   return NULL;
 386 }
 387
 388 /* Generic hook that takes a machine mode and returns an unsigned int 0.  */
 389 unsigned int
 390 hook_uint_mode_0 (machine_mode)
 391 {
 392   return 0;
 393 }
 394
 395 /* Generic hook that takes no arguments and returns a NULL const string.  */
 396 const char *
 397 hook_constcharptr_void_null (void)
 398 {
 399   return NULL;
 400 }
 401
 402 /* Generic hook that takes no arguments and returns a NULL string.  */
 403 char *
 404 hook_charptr_void_null (void)
 405 {
 406   return NULL;
 407 }
 408
 409 /* Generic hook that takes a tree and returns a NULL string.  */
 410 const char *
 411 hook_constcharptr_const_tree_null (const_tree)
 412 {
 413   return NULL;
 414 }
 415
 416 tree
 417 hook_tree_tree_int_treep_bool_null (tree, int, tree *, bool)
 418 {
 419   return NULL;
 420 }
 421
 422 tree
 423 hook_tree_tree_tree_null (tree, tree)
 424 {
 425   return NULL;
 426 }
 427
 428 tree
 429 hook_tree_tree_tree_tree_null (tree, tree, tree)
 430 {
 431   return NULL;
 432 }
 433
 434 /* Generic hook that takes an rtx_insn *and returns a NULL string.  */
 435 const char *
 436 hook_constcharptr_const_rtx_insn_null (const rtx_insn *)
 437 {
 438   return NULL;
 439 }
 440
 441 const char *
 442 hook_constcharptr_const_tree_const_tree_null (const_tree, const_tree)
 443 {
 444   return NULL;
 445 }
 446
 447 const char *
 448 hook_constcharptr_int_const_tree_null (int, const_tree)
 449 {
 450   return NULL;
 451 }
 452
 453 const char *
 454 hook_constcharptr_int_const_tree_const_tree_null (int, const_tree, const_tree)
 455 {
 456   return NULL;
 457 }
 458
 459 /* Generic hook that takes a const_tree and returns NULL_TREE.  */
 460 tree
 461 hook_tree_const_tree_null (const_tree)
 462 {
 463   return NULL;
 464 }
 465
 466 /* Generic hook that takes no arguments and returns a NULL_TREE.  */
 467 tree
 468 hook_tree_void_null (void)
 469 {
 470   return NULL;
 471 }
 472
 473 /* Generic hook that takes a rtx_insn * and an int and returns a bool.  */
 474
 475 bool
 476 hook_bool_rtx_insn_int_false (rtx_insn *, int)
 477 {
 478   return false;
 479 }
 480
 481 /* Generic hook that takes a rtx_insn * and an int and returns void.  */
 482
 483 void
 484 hook_void_rtx_insn_int (rtx_insn *, int)
 485 {
 486 }
 487
 488 /* Generic hook that takes a struct gcc_options * and returns void.  */
 489
 490 void
 491 hook_void_gcc_optionsp (struct gcc_options *)
 492 {
 493 }
 494
 495 /* Generic hook that takes an unsigned int, an unsigned int pointer and
 496    returns false.  */
 497
 498 bool
 499 hook_bool_uint_uintp_false (unsigned int, unsigned int *)
 500 {
 501   return false;
 502 }
 503
 504 /* Generic hook that takes a register class and returns false.  */
 505 bool
 506 hook_bool_reg_class_t_false (reg_class_t regclass ATTRIBUTE_UNUSED)
 507 {
 508   return false;
 509 }
 510
 511 /* Generic hook that takes 2 machine_modes and a register class and
 512    returns true.  */
 513 bool
 514 hook_bool_mode_mode_reg_class_t_true (machine_mode, machine_mode, reg_class_t)
 515 {
 516   return true;
 517 }
 518
 519 /* Generic hook that takes a machine_mode and 2 register classes
 520    and returns false.  */
 521 bool
 522 hook_bool_mode_reg_class_t_reg_class_t_false (machine_mode, reg_class_t,
 523                                               reg_class_t)
 524 {
 525   return false;
 526 }
 527
 528 /* Generic hook that takes a mode and an unsigned HOST_WIDE_INT and
 529    returns no mode.  */
 530
 531 opt_machine_mode
 532 hook_optmode_mode_uhwi_none (machine_mode, unsigned HOST_WIDE_INT)
 533 {
 534   return opt_machine_mode ();
 535 }