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, const_rtx) and returns false.  */
  86 bool
  87 hook_bool_mode_const_rtx_false (machine_mode, const_rtx)
  88 {
  89   return false;
  90 }
  91
  92 /* Generic hook that takes (machine_mode, const_rtx) and returns true.  */
  93 bool
  94 hook_bool_mode_const_rtx_true (machine_mode, const_rtx)
  95 {
  96   return true;
  97 }
  98
  99 /* Generic hook that takes (machine_mode, rtx) and returns false.  */
 100 bool
 101 hook_bool_mode_rtx_false (machine_mode, rtx)
 102 {
 103   return false;
 104 }
 105
 106 /* Generic hook that takes (machine_mode, rtx) and returns true.  */
 107 bool
 108 hook_bool_mode_rtx_true (machine_mode, rtx)
 109 {
 110   return true;
 111 }
 112
 113 /* Generic hook that takes (const rtx_insn *, const rtx_insn *) and returns true.  */
 114 bool
 115 hook_bool_const_rtx_insn_const_rtx_insn_true (const rtx_insn *,
 116                                               const rtx_insn *)
 117 {
 118   return true;
 119 }
 120
 121 /* Generic hook that takes (machine_mode, unsigned HOST_WIDE_INT)
 122    and returns false.  */
 123 bool
 124 hook_bool_mode_uhwi_false (machine_mode, unsigned HOST_WIDE_INT)
 125 {
 126   return false;
 127 }
 128
 129 /* Generic hook that takes (unsigned int, machine_mode) and returns false.  */
 130 bool
 131 hook_bool_uint_mode_false (unsigned int, machine_mode)
 132 {
 133   return false;
 134 }
 135
 136 /* Generic hook that takes (unsigned int, machine_mode) and returns true.  */
 137 bool
 138 hook_bool_uint_mode_true (unsigned int, machine_mode)
 139 {
 140   return true;
 141 }
 142
 143 /* Generic hook that takes (FILE *, const char *) and does nothing.  */
 144 void
 145 hook_void_FILEptr_constcharptr (FILE *, const char *)
 146 {
 147 }
 148
 149 /* Generic hook that takes (FILE *, const char *, constr_tree *) and does
 150    nothing.  */
 151 void
 152 hook_void_FILEptr_constcharptr_const_tree (FILE *, const char *, const_tree)
 153 {
 154 }
 155
 156 /* Generic hook that takes (FILE *, rtx) and returns false.  */
 157 bool
 158 hook_bool_FILEptr_rtx_false (FILE *, rtx)
 159 {
 160   return false;
 161 }
 162
 163 /* Generic hook that takes (gimple_stmt_iterator *) and returns
 164    false.  */
 165 bool
 166 hook_bool_gsiptr_false (gimple_stmt_iterator *)
 167 {
 168   return false;
 169 }
 170
 171 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook.  */
 172 bool
 173 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree, HOST_WIDE_INT,
 174                                                HOST_WIDE_INT, const_tree)
 175 {
 176   return false;
 177 }
 178
 179 bool
 180 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree, HOST_WIDE_INT,
 181                                               HOST_WIDE_INT, const_tree)
 182 {
 183   return true;
 184 }
 185
 186 bool
 187 default_can_output_mi_thunk_no_vcall (const_tree, HOST_WIDE_INT,
 188                                       HOST_WIDE_INT c, const_tree)
 189 {
 190   return c == 0;
 191 }
 192
 193 int
 194 hook_int_uint_mode_1 (unsigned int, machine_mode)
 195 {
 196   return 1;
 197 }
 198
 199 int
 200 hook_int_const_tree_0 (const_tree)
 201 {
 202   return 0;
 203 }
 204
 205 /* ??? Used for comp_type_attributes, which ought to return bool.  */
 206 int
 207 hook_int_const_tree_const_tree_1 (const_tree, const_tree)
 208 {
 209   return 1;
 210 }
 211
 212 int
 213 hook_int_rtx_0 (rtx)
 214 {
 215   return 0;
 216 }
 217
 218 int
 219 hook_int_rtx_1 (rtx)
 220 {
 221   return 1;
 222 }
 223
 224 int
 225 hook_int_rtx_insn_unreachable (rtx_insn *)
 226 {
 227   gcc_unreachable ();
 228 }
 229
 230 int
 231 hook_int_rtx_bool_0 (rtx, bool)
 232 {
 233   return 0;
 234 }
 235
 236 int
 237 hook_int_rtx_mode_as_bool_0 (rtx, machine_mode, addr_space_t, bool)
 238 {
 239   return 0;
 240 }
 241
 242 unsigned int
 243 hook_uint_void_0 (void)
 244 {
 245   return 0;
 246 }
 247
 248 void
 249 hook_void_tree (tree)
 250 {
 251 }
 252
 253 void
 254 hook_void_rtx_tree (rtx, tree)
 255 {
 256 }
 257
 258 void
 259 hook_void_constcharptr (const char *)
 260 {
 261 }
 262
 263 void
 264 hook_void_tree_treeptr (tree, tree *)
 265 {
 266 }
 267
 268 void
 269 hook_void_int_int (int, int)
 270 {
 271 }
 272
 273 bool
 274 hook_bool_tree_false (tree)
 275 {
 276   return false;
 277 }
 278
 279 bool
 280 hook_bool_const_tree_false (const_tree)
 281 {
 282   return false;
 283 }
 284
 285 bool
 286 hook_bool_tree_true (tree)
 287 {
 288   return true;
 289 }
 290
 291 bool
 292 hook_bool_const_tree_true (const_tree)
 293 {
 294   return true;
 295 }
 296
 297 bool
 298 hook_bool_tree_tree_false (tree, tree)
 299 {
 300   return false;
 301 }
 302
 303 bool
 304 hook_bool_tree_tree_true (tree, tree)
 305 {
 306   return true;
 307 }
 308
 309 bool
 310 hook_bool_tree_bool_false (tree, bool)
 311 {
 312   return false;
 313 }
 314
 315 bool
 316 hook_bool_rtx_insn_true (rtx_insn *)
 317 {
 318   return true;
 319 }
 320
 321 bool
 322 hook_bool_rtx_false (rtx)
 323 {
 324   return false;
 325 }
 326
 327 bool
 328 hook_bool_uintp_uintp_false (unsigned int *, unsigned int *)
 329 {
 330   return false;
 331 }
 332
 333 bool
 334 hook_bool_rtx_mode_int_int_intp_bool_false (rtx, machine_mode, int, int,
 335                                             int *, bool)
 336 {
 337   return false;
 338 }
 339
 340 bool
 341 hook_bool_wint_wint_uint_bool_true (const widest_int &, const widest_int &,
 342                                     unsigned int, bool)
 343 {
 344   return true;
 345 }
 346
 347 /* Generic hook that takes an rtx and returns it.  */
 348 rtx
 349 hook_rtx_rtx_identity (rtx x)
 350 {
 351   return x;
 352 }
 353
 354 /* Generic hook that takes an rtx and returns NULL_RTX.  */
 355 rtx
 356 hook_rtx_rtx_null (rtx)
 357 {
 358   return NULL;
 359 }
 360
 361 /* Generic hook that takes a tree and an int and returns NULL_RTX.  */
 362 rtx
 363 hook_rtx_tree_int_null (tree, int)
 364 {
 365   return NULL;
 366 }
 367
 368 /* Generic hook that takes a machine mode and returns an unsigned int 0.  */
 369 unsigned int
 370 hook_uint_mode_0 (machine_mode)
 371 {
 372   return 0;
 373 }
 374
 375 /* Generic hook that takes no arguments and returns a NULL const string.  */
 376 const char *
 377 hook_constcharptr_void_null (void)
 378 {
 379   return NULL;
 380 }
 381
 382 /* Generic hook that takes no arguments and returns a NULL string.  */
 383 char *
 384 hook_charptr_void_null (void)
 385 {
 386   return NULL;
 387 }
 388
 389 /* Generic hook that takes a tree and returns a NULL string.  */
 390 const char *
 391 hook_constcharptr_const_tree_null (const_tree)
 392 {
 393   return NULL;
 394 }
 395
 396 tree
 397 hook_tree_tree_int_treep_bool_null (tree, int, tree *, bool)
 398 {
 399   return NULL;
 400 }
 401
 402 tree
 403 hook_tree_tree_tree_null (tree, tree)
 404 {
 405   return NULL;
 406 }
 407
 408 tree
 409 hook_tree_tree_tree_tree_null (tree, tree, tree)
 410 {
 411   return NULL;
 412 }
 413
 414 /* Generic hook that takes an rtx_insn *and returns a NULL string.  */
 415 const char *
 416 hook_constcharptr_const_rtx_insn_null (const rtx_insn *)
 417 {
 418   return NULL;
 419 }
 420
 421 const char *
 422 hook_constcharptr_const_tree_const_tree_null (const_tree, const_tree)
 423 {
 424   return NULL;
 425 }
 426
 427 const char *
 428 hook_constcharptr_int_const_tree_null (int, const_tree)
 429 {
 430   return NULL;
 431 }
 432
 433 const char *
 434 hook_constcharptr_int_const_tree_const_tree_null (int, const_tree, const_tree)
 435 {
 436   return NULL;
 437 }
 438
 439 /* Generic hook that takes a const_tree and returns NULL_TREE.  */
 440 tree
 441 hook_tree_const_tree_null (const_tree)
 442 {
 443   return NULL;
 444 }
 445
 446 /* Generic hook that takes no arguments and returns a NULL_TREE.  */
 447 tree
 448 hook_tree_void_null (void)
 449 {
 450   return NULL;
 451 }
 452
 453 /* Generic hook that takes a rtx_insn * and an int and returns a bool.  */
 454
 455 bool
 456 hook_bool_rtx_insn_int_false (rtx_insn *, int)
 457 {
 458   return false;
 459 }
 460
 461 /* Generic hook that takes a rtx_insn * and an int and returns void.  */
 462
 463 void
 464 hook_void_rtx_insn_int (rtx_insn *, int)
 465 {
 466 }
 467
 468 /* Generic hook that takes a struct gcc_options * and returns void.  */
 469
 470 void
 471 hook_void_gcc_optionsp (struct gcc_options *)
 472 {
 473 }
 474
 475 /* Generic hook that takes an unsigned int, an unsigned int pointer and
 476    returns false.  */
 477
 478 bool
 479 hook_bool_uint_uintp_false (unsigned int, unsigned int *)
 480 {
 481   return false;
 482 }
 483
 484 /* Generic hook that takes a register class and returns false.  */
 485 bool
 486 hook_bool_reg_class_t_false (reg_class_t regclass ATTRIBUTE_UNUSED)
 487 {
 488   return false;
 489 }
 490