gcc/hooks.c

   1 /* General-purpose hooks.
   2    Copyright (C) 2002-2017 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 (unsigned int, unsigned int) and returns true.  */
 137 bool
 138 hook_bool_uint_uint_true (unsigned int, unsigned int)
 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 void
 263 hook_void_tree (tree)
 264 {
 265 }
 266
 267 void
 268 hook_void_rtx_tree (rtx, tree)
 269 {
 270 }
 271
 272 void
 273 hook_void_constcharptr (const char *)
 274 {
 275 }
 276
 277 void
 278 hook_void_tree_treeptr (tree, tree *)
 279 {
 280 }
 281
 282 void
 283 hook_void_int_int (int, int)
 284 {
 285 }
 286
 287 bool
 288 hook_bool_tree_false (tree)
 289 {
 290   return false;
 291 }
 292
 293 bool
 294 hook_bool_const_tree_false (const_tree)
 295 {
 296   return false;
 297 }
 298
 299 bool
 300 hook_bool_tree_true (tree)
 301 {
 302   return true;
 303 }
 304
 305 bool
 306 hook_bool_const_tree_true (const_tree)
 307 {
 308   return true;
 309 }
 310
 311 bool
 312 hook_bool_tree_tree_false (tree, tree)
 313 {
 314   return false;
 315 }
 316
 317 bool
 318 hook_bool_tree_tree_true (tree, tree)
 319 {
 320   return true;
 321 }
 322
 323 bool
 324 hook_bool_tree_bool_false (tree, bool)
 325 {
 326   return false;
 327 }
 328
 329 bool
 330 hook_bool_rtx_insn_true (rtx_insn *)
 331 {
 332   return true;
 333 }
 334
 335 bool
 336 hook_bool_rtx_false (rtx)
 337 {
 338   return false;
 339 }
 340
 341 bool
 342 hook_bool_uintp_uintp_false (unsigned int *, unsigned int *)
 343 {
 344   return false;
 345 }
 346
 347 bool
 348 hook_bool_rtx_mode_int_int_intp_bool_false (rtx, machine_mode, int, int,
 349                                             int *, bool)
 350 {
 351   return false;
 352 }
 353
 354 bool
 355 hook_bool_wint_wint_uint_bool_true (const widest_int &, const widest_int &,
 356                                     unsigned int, bool)
 357 {
 358   return true;
 359 }
 360
 361 /* Generic hook that takes an rtx and returns it.  */
 362 rtx
 363 hook_rtx_rtx_identity (rtx x)
 364 {
 365   return x;
 366 }
 367
 368 /* Generic hook that takes an rtx and returns NULL_RTX.  */
 369 rtx
 370 hook_rtx_rtx_null (rtx)
 371 {
 372   return NULL;
 373 }
 374
 375 /* Generic hook that takes a tree and an int and returns NULL_RTX.  */
 376 rtx
 377 hook_rtx_tree_int_null (tree, int)
 378 {
 379   return NULL;
 380 }
 381
 382 /* Generic hook that takes a machine mode and returns an unsigned int 0.  */
 383 unsigned int
 384 hook_uint_mode_0 (machine_mode)
 385 {
 386   return 0;
 387 }
 388
 389 /* Generic hook that takes no arguments and returns a NULL const string.  */
 390 const char *
 391 hook_constcharptr_void_null (void)
 392 {
 393   return NULL;
 394 }
 395
 396 /* Generic hook that takes no arguments and returns a NULL string.  */
 397 char *
 398 hook_charptr_void_null (void)
 399 {
 400   return NULL;
 401 }
 402
 403 /* Generic hook that takes a tree and returns a NULL string.  */
 404 const char *
 405 hook_constcharptr_const_tree_null (const_tree)
 406 {
 407   return NULL;
 408 }
 409
 410 tree
 411 hook_tree_tree_int_treep_bool_null (tree, int, tree *, bool)
 412 {
 413   return NULL;
 414 }
 415
 416 tree
 417 hook_tree_tree_tree_null (tree, tree)
 418 {
 419   return NULL;
 420 }
 421
 422 tree
 423 hook_tree_tree_tree_tree_null (tree, tree, tree)
 424 {
 425   return NULL;
 426 }
 427
 428 /* Generic hook that takes an rtx_insn *and returns a NULL string.  */
 429 const char *
 430 hook_constcharptr_const_rtx_insn_null (const rtx_insn *)
 431 {
 432   return NULL;
 433 }
 434
 435 const char *
 436 hook_constcharptr_const_tree_const_tree_null (const_tree, const_tree)
 437 {
 438   return NULL;
 439 }
 440
 441 const char *
 442 hook_constcharptr_int_const_tree_null (int, const_tree)
 443 {
 444   return NULL;
 445 }
 446
 447 const char *
 448 hook_constcharptr_int_const_tree_const_tree_null (int, const_tree, const_tree)
 449 {
 450   return NULL;
 451 }
 452
 453 /* Generic hook that takes a const_tree and returns NULL_TREE.  */
 454 tree
 455 hook_tree_const_tree_null (const_tree)
 456 {
 457   return NULL;
 458 }
 459
 460 /* Generic hook that takes no arguments and returns a NULL_TREE.  */
 461 tree
 462 hook_tree_void_null (void)
 463 {
 464   return NULL;
 465 }
 466
 467 /* Generic hook that takes a rtx_insn * and an int and returns a bool.  */
 468
 469 bool
 470 hook_bool_rtx_insn_int_false (rtx_insn *, int)
 471 {
 472   return false;
 473 }
 474
 475 /* Generic hook that takes a rtx_insn * and an int and returns void.  */
 476
 477 void
 478 hook_void_rtx_insn_int (rtx_insn *, int)
 479 {
 480 }
 481
 482 /* Generic hook that takes a struct gcc_options * and returns void.  */
 483
 484 void
 485 hook_void_gcc_optionsp (struct gcc_options *)
 486 {
 487 }
 488
 489 /* Generic hook that takes an unsigned int, an unsigned int pointer and
 490    returns false.  */
 491
 492 bool
 493 hook_bool_uint_uintp_false (unsigned int, unsigned int *)
 494 {
 495   return false;
 496 }
 497
 498 /* Generic hook that takes a register class and returns false.  */
 499 bool
 500 hook_bool_reg_class_t_false (reg_class_t regclass ATTRIBUTE_UNUSED)
 501 {
 502   return false;
 503 }
 504
 505 /* Generic hook that takes 2 machine_modes and a register class and
 506    returns true.  */
 507 bool
 508 hook_bool_mode_mode_reg_class_t_true (machine_mode, machine_mode, reg_class_t)
 509 {
 510   return true;
 511 }
 512
 513 /* Generic hook that takes a machine_mode and 2 register classes
 514    and returns false.  */
 515 bool
 516 hook_bool_mode_reg_class_t_reg_class_t_false (machine_mode, reg_class_t,
 517                                               reg_class_t)
 518 {
 519   return false;
 520 }
 521