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 } 542