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, machine_mode) and returns false.  */
 137 bool
 138 hook_bool_uint_mode_false (unsigned int, machine_mode)
 139 {
 140   return false;
 141 }
 142
 143 /* Generic hook that takes (unsigned int, machine_mode) and returns true.  */
 144 bool
 145 hook_bool_uint_mode_true (unsigned int, machine_mode)
 146 {
 147   return true;
 148 }
 149
 150 /* Generic hook that takes (FILE *, const char *) and does nothing.  */
 151 void
 152 hook_void_FILEptr_constcharptr (FILE *, const char *)
 153 {
 154 }
 155
 156 /* Generic hook that takes (FILE *, const char *, constr_tree *) and does
 157    nothing.  */
 158 void
 159 hook_void_FILEptr_constcharptr_const_tree (FILE *, const char *, const_tree)
 160 {
 161 }
 162
 163 /* Generic hook that takes (FILE *, rtx) and returns false.  */
 164 bool
 165 hook_bool_FILEptr_rtx_false (FILE *, rtx)
 166 {
 167   return false;
 168 }
 169
 170 /* Generic hook that takes (gimple_stmt_iterator *) and returns
 171    false.  */
 172 bool
 173 hook_bool_gsiptr_false (gimple_stmt_iterator *)
 174 {
 175   return false;
 176 }
 177
 178 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook.  */
 179 bool
 180 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree, HOST_WIDE_INT,
 181                                                HOST_WIDE_INT, const_tree)
 182 {
 183   return false;
 184 }
 185
 186 bool
 187 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree, HOST_WIDE_INT,
 188                                               HOST_WIDE_INT, const_tree)
 189 {
 190   return true;
 191 }
 192
 193 bool
 194 default_can_output_mi_thunk_no_vcall (const_tree, HOST_WIDE_INT,
 195                                       HOST_WIDE_INT c, const_tree)
 196 {
 197   return c == 0;
 198 }
 199
 200 int
 201 hook_int_uint_mode_1 (unsigned int, machine_mode)
 202 {
 203   return 1;
 204 }
 205
 206 int
 207 hook_int_const_tree_0 (const_tree)
 208 {
 209   return 0;
 210 }
 211
 212 /* ??? Used for comp_type_attributes, which ought to return bool.  */
 213 int
 214 hook_int_const_tree_const_tree_1 (const_tree, const_tree)
 215 {
 216   return 1;
 217 }
 218
 219 int
 220 hook_int_rtx_0 (rtx)
 221 {
 222   return 0;
 223 }
 224
 225 int
 226 hook_int_rtx_1 (rtx)
 227 {
 228   return 1;
 229 }
 230
 231 int
 232 hook_int_rtx_insn_unreachable (rtx_insn *)
 233 {
 234   gcc_unreachable ();
 235 }
 236
 237 int
 238 hook_int_rtx_bool_0 (rtx, bool)
 239 {
 240   return 0;
 241 }
 242
 243 int
 244 hook_int_rtx_mode_as_bool_0 (rtx, machine_mode, addr_space_t, bool)
 245 {
 246   return 0;
 247 }
 248
 249 unsigned int
 250 hook_uint_void_0 (void)
 251 {
 252   return 0;
 253 }
 254
 255 void
 256 hook_void_tree (tree)
 257 {
 258 }
 259
 260 void
 261 hook_void_rtx_tree (rtx, tree)
 262 {
 263 }
 264
 265 void
 266 hook_void_constcharptr (const char *)
 267 {
 268 }
 269
 270 void
 271 hook_void_tree_treeptr (tree, tree *)
 272 {
 273 }
 274
 275 void
 276 hook_void_int_int (int, int)
 277 {
 278 }
 279
 280 bool
 281 hook_bool_tree_false (tree)
 282 {
 283   return false;
 284 }
 285
 286 bool
 287 hook_bool_const_tree_false (const_tree)
 288 {
 289   return false;
 290 }
 291
 292 bool
 293 hook_bool_tree_true (tree)
 294 {
 295   return true;
 296 }
 297
 298 bool
 299 hook_bool_const_tree_true (const_tree)
 300 {
 301   return true;
 302 }
 303
 304 bool
 305 hook_bool_tree_tree_false (tree, tree)
 306 {
 307   return false;
 308 }
 309
 310 bool
 311 hook_bool_tree_tree_true (tree, tree)
 312 {
 313   return true;
 314 }
 315
 316 bool
 317 hook_bool_tree_bool_false (tree, bool)
 318 {
 319   return false;
 320 }
 321
 322 bool
 323 hook_bool_rtx_insn_true (rtx_insn *)
 324 {
 325   return true;
 326 }
 327
 328 bool
 329 hook_bool_rtx_false (rtx)
 330 {
 331   return false;
 332 }
 333
 334 bool
 335 hook_bool_uintp_uintp_false (unsigned int *, unsigned int *)
 336 {
 337   return false;
 338 }
 339
 340 bool
 341 hook_bool_rtx_mode_int_int_intp_bool_false (rtx, machine_mode, int, int,
 342                                             int *, bool)
 343 {
 344   return false;
 345 }
 346
 347 bool
 348 hook_bool_wint_wint_uint_bool_true (const widest_int &, const widest_int &,
 349                                     unsigned int, bool)
 350 {
 351   return true;
 352 }
 353
 354 /* Generic hook that takes an rtx and returns it.  */
 355 rtx
 356 hook_rtx_rtx_identity (rtx x)
 357 {
 358   return x;
 359 }
 360
 361 /* Generic hook that takes an rtx and returns NULL_RTX.  */
 362 rtx
 363 hook_rtx_rtx_null (rtx)
 364 {
 365   return NULL;
 366 }
 367
 368 /* Generic hook that takes a tree and an int and returns NULL_RTX.  */
 369 rtx
 370 hook_rtx_tree_int_null (tree, int)
 371 {
 372   return NULL;
 373 }
 374
 375 /* Generic hook that takes a machine mode and returns an unsigned int 0.  */
 376 unsigned int
 377 hook_uint_mode_0 (machine_mode)
 378 {
 379   return 0;
 380 }
 381
 382 /* Generic hook that takes no arguments and returns a NULL const string.  */
 383 const char *
 384 hook_constcharptr_void_null (void)
 385 {
 386   return NULL;
 387 }
 388
 389 /* Generic hook that takes no arguments and returns a NULL string.  */
 390 char *
 391 hook_charptr_void_null (void)
 392 {
 393   return NULL;
 394 }
 395
 396 /* Generic hook that takes a tree and returns a NULL string.  */
 397 const char *
 398 hook_constcharptr_const_tree_null (const_tree)
 399 {
 400   return NULL;
 401 }
 402
 403 tree
 404 hook_tree_tree_int_treep_bool_null (tree, int, tree *, bool)
 405 {
 406   return NULL;
 407 }
 408
 409 tree
 410 hook_tree_tree_tree_null (tree, tree)
 411 {
 412   return NULL;
 413 }
 414
 415 tree
 416 hook_tree_tree_tree_tree_null (tree, tree, tree)
 417 {
 418   return NULL;
 419 }
 420
 421 /* Generic hook that takes an rtx_insn *and returns a NULL string.  */
 422 const char *
 423 hook_constcharptr_const_rtx_insn_null (const rtx_insn *)
 424 {
 425   return NULL;
 426 }
 427
 428 const char *
 429 hook_constcharptr_const_tree_const_tree_null (const_tree, const_tree)
 430 {
 431   return NULL;
 432 }
 433
 434 const char *
 435 hook_constcharptr_int_const_tree_null (int, const_tree)
 436 {
 437   return NULL;
 438 }
 439
 440 const char *
 441 hook_constcharptr_int_const_tree_const_tree_null (int, const_tree, const_tree)
 442 {
 443   return NULL;
 444 }
 445
 446 /* Generic hook that takes a const_tree and returns NULL_TREE.  */
 447 tree
 448 hook_tree_const_tree_null (const_tree)
 449 {
 450   return NULL;
 451 }
 452
 453 /* Generic hook that takes no arguments and returns a NULL_TREE.  */
 454 tree
 455 hook_tree_void_null (void)
 456 {
 457   return NULL;
 458 }
 459
 460 /* Generic hook that takes a rtx_insn * and an int and returns a bool.  */
 461
 462 bool
 463 hook_bool_rtx_insn_int_false (rtx_insn *, int)
 464 {
 465   return false;
 466 }
 467
 468 /* Generic hook that takes a rtx_insn * and an int and returns void.  */
 469
 470 void
 471 hook_void_rtx_insn_int (rtx_insn *, int)
 472 {
 473 }
 474
 475 /* Generic hook that takes a struct gcc_options * and returns void.  */
 476
 477 void
 478 hook_void_gcc_optionsp (struct gcc_options *)
 479 {
 480 }
 481
 482 /* Generic hook that takes an unsigned int, an unsigned int pointer and
 483    returns false.  */
 484
 485 bool
 486 hook_bool_uint_uintp_false (unsigned int, unsigned int *)
 487 {
 488   return false;
 489 }
 490
 491 /* Generic hook that takes a register class and returns false.  */
 492 bool
 493 hook_bool_reg_class_t_false (reg_class_t regclass ATTRIBUTE_UNUSED)
 494 {
 495   return false;
 496 }
 497