1 /* General-purpose hooks. 2 Copyright (C) 2002-2015 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 a ATTRIBUTE_UNUSED) 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 a ATTRIBUTE_UNUSED, 61 struct gcc_options *opts ATTRIBUTE_UNUSED) 62 { 63 return false; 64 } 65 66 /* Generic hook that takes const int, const int) and returns true. */ 67 bool hook_bool_const_int_const_int_true (const int a ATTRIBUTE_UNUSED, 68 const int b ATTRIBUTE_UNUSED) 69 { 70 return true; 71 } 72 73 /* Generic hook that takes (machine_mode) and returns false. */ 74 bool 75 hook_bool_mode_false (machine_mode mode ATTRIBUTE_UNUSED) 76 { 77 return false; 78 } 79 80 /* Generic hook that takes (machine_mode) and returns true. */ 81 bool 82 hook_bool_mode_true (machine_mode mode ATTRIBUTE_UNUSED) 83 { 84 return true; 85 } 86 87 /* Generic hook that takes (machine_mode, const_rtx) and returns false. */ 88 bool 89 hook_bool_mode_const_rtx_false (machine_mode mode ATTRIBUTE_UNUSED, 90 const_rtx value ATTRIBUTE_UNUSED) 91 { 92 return false; 93 } 94 95 /* Generic hook that takes (machine_mode, const_rtx) and returns true. */ 96 bool 97 hook_bool_mode_const_rtx_true (machine_mode mode ATTRIBUTE_UNUSED, 98 const_rtx value ATTRIBUTE_UNUSED) 99 { 100 return true; 101 } 102 103 /* Generic hook that takes (machine_mode, rtx) and returns false. */ 104 bool 105 hook_bool_mode_rtx_false (machine_mode mode ATTRIBUTE_UNUSED, 106 rtx value ATTRIBUTE_UNUSED) 107 { 108 return false; 109 } 110 111 /* Generic hook that takes (machine_mode, rtx) and returns true. */ 112 bool 113 hook_bool_mode_rtx_true (machine_mode mode ATTRIBUTE_UNUSED, 114 rtx value ATTRIBUTE_UNUSED) 115 { 116 return true; 117 } 118 119 /* Generic hook that takes (const rtx_insn *, const rtx_insn *) and returns true. */ 120 bool 121 hook_bool_const_rtx_insn_const_rtx_insn_true (const rtx_insn *follower ATTRIBUTE_UNUSED, 122 const rtx_insn *followee ATTRIBUTE_UNUSED) 123 { 124 return true; 125 } 126 127 /* Generic hook that takes (machine_mode, unsigned HOST_WIDE_INT) 128 and returns false. */ 129 bool 130 hook_bool_mode_uhwi_false (machine_mode mode ATTRIBUTE_UNUSED, 131 unsigned HOST_WIDE_INT value ATTRIBUTE_UNUSED) 132 { 133 return false; 134 } 135 136 /* Generic hook that takes (FILE *, const char *) and does nothing. */ 137 void 138 hook_void_FILEptr_constcharptr (FILE *a ATTRIBUTE_UNUSED, const char *b ATTRIBUTE_UNUSED) 139 { 140 } 141 142 /* Generic hook that takes (FILE *, const char *, constr_tree *) and does 143 nothing. */ 144 void 145 hook_void_FILEptr_constcharptr_const_tree (FILE *, const char *, const_tree) 146 { 147 } 148 149 /* Generic hook that takes (FILE *, rtx) and returns false. */ 150 bool 151 hook_bool_FILEptr_rtx_false (FILE *a ATTRIBUTE_UNUSED, 152 rtx b ATTRIBUTE_UNUSED) 153 { 154 return false; 155 } 156 157 /* Generic hook that takes (gimple_stmt_iterator *) and returns 158 false. */ 159 bool 160 hook_bool_gsiptr_false (gimple_stmt_iterator *a ATTRIBUTE_UNUSED) 161 { 162 return false; 163 } 164 165 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook. */ 166 bool 167 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree a ATTRIBUTE_UNUSED, 168 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 169 HOST_WIDE_INT c ATTRIBUTE_UNUSED, 170 const_tree d ATTRIBUTE_UNUSED) 171 { 172 return false; 173 } 174 175 bool 176 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree a ATTRIBUTE_UNUSED, 177 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 178 HOST_WIDE_INT c ATTRIBUTE_UNUSED, 179 const_tree d ATTRIBUTE_UNUSED) 180 { 181 return true; 182 } 183 184 bool 185 default_can_output_mi_thunk_no_vcall (const_tree a ATTRIBUTE_UNUSED, 186 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 187 HOST_WIDE_INT c, 188 const_tree d ATTRIBUTE_UNUSED) 189 { 190 return c == 0; 191 } 192 193 int 194 hook_int_uint_mode_1 (unsigned int a ATTRIBUTE_UNUSED, 195 machine_mode b ATTRIBUTE_UNUSED) 196 { 197 return 1; 198 } 199 200 int 201 hook_int_const_tree_0 (const_tree a ATTRIBUTE_UNUSED) 202 { 203 return 0; 204 } 205 206 /* ??? Used for comp_type_attributes, which ought to return bool. */ 207 int 208 hook_int_const_tree_const_tree_1 (const_tree a ATTRIBUTE_UNUSED, const_tree b ATTRIBUTE_UNUSED) 209 { 210 return 1; 211 } 212 213 int 214 hook_int_rtx_0 (rtx a ATTRIBUTE_UNUSED) 215 { 216 return 0; 217 } 218 219 int 220 hook_int_rtx_1 (rtx) 221 { 222 return 1; 223 } 224 225 int 226 hook_int_rtx_insn_unreachable (rtx_insn *) 227 { 228 gcc_unreachable (); 229 } 230 231 int 232 hook_int_rtx_bool_0 (rtx a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED) 233 { 234 return 0; 235 } 236 237 int 238 hook_int_rtx_mode_as_bool_0 (rtx, machine_mode, addr_space_t, bool) 239 { 240 return 0; 241 } 242 243 unsigned int 244 hook_uint_void_0 (void) 245 { 246 return 0; 247 } 248 249 void 250 hook_void_tree (tree a ATTRIBUTE_UNUSED) 251 { 252 } 253 254 void 255 hook_void_rtx_tree (rtx, tree) 256 { 257 } 258 259 void 260 hook_void_constcharptr (const char *a ATTRIBUTE_UNUSED) 261 { 262 } 263 264 void 265 hook_void_tree_treeptr (tree a ATTRIBUTE_UNUSED, tree *b ATTRIBUTE_UNUSED) 266 { 267 } 268 269 void 270 hook_void_int_int (int a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED) 271 { 272 } 273 274 bool 275 hook_bool_tree_false (tree a ATTRIBUTE_UNUSED) 276 { 277 return false; 278 } 279 280 bool 281 hook_bool_const_tree_false (const_tree a ATTRIBUTE_UNUSED) 282 { 283 return false; 284 } 285 286 bool 287 hook_bool_tree_true (tree a ATTRIBUTE_UNUSED) 288 { 289 return true; 290 } 291 292 bool 293 hook_bool_const_tree_true (const_tree a ATTRIBUTE_UNUSED) 294 { 295 return true; 296 } 297 298 bool 299 hook_bool_tree_tree_false (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED) 300 { 301 return false; 302 } 303 304 bool 305 hook_bool_tree_tree_true (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED) 306 { 307 return true; 308 } 309 310 bool 311 hook_bool_tree_bool_false (tree a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED) 312 { 313 return false; 314 } 315 316 bool 317 hook_bool_rtx_insn_true (rtx_insn *insn ATTRIBUTE_UNUSED) 318 { 319 return true; 320 } 321 322 bool 323 hook_bool_rtx_false (rtx a ATTRIBUTE_UNUSED) 324 { 325 return false; 326 } 327 328 bool 329 hook_bool_uintp_uintp_false (unsigned int *a ATTRIBUTE_UNUSED, 330 unsigned int *b ATTRIBUTE_UNUSED) 331 { 332 return false; 333 } 334 335 bool 336 hook_bool_rtx_int_int_int_intp_bool_false (rtx a ATTRIBUTE_UNUSED, 337 int b ATTRIBUTE_UNUSED, 338 int c ATTRIBUTE_UNUSED, 339 int d ATTRIBUTE_UNUSED, 340 int *e ATTRIBUTE_UNUSED, 341 bool speed_p ATTRIBUTE_UNUSED) 342 { 343 return false; 344 } 345 346 bool 347 hook_bool_wint_wint_uint_bool_true (const widest_int &, const widest_int &, 348 unsigned int, bool) 349 { 350 return true; 351 } 352 353 /* Generic hook that takes an rtx and returns it. */ 354 rtx 355 hook_rtx_rtx_identity (rtx x) 356 { 357 return x; 358 } 359 360 /* Generic hook that takes an rtx and returns NULL_RTX. */ 361 rtx 362 hook_rtx_rtx_null (rtx x ATTRIBUTE_UNUSED) 363 { 364 return NULL; 365 } 366 367 /* Generic hook that takes a tree and an int and returns NULL_RTX. */ 368 rtx 369 hook_rtx_tree_int_null (tree a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED) 370 { 371 return NULL; 372 } 373 374 /* Generic hook that takes a machine mode and returns an unsigned int 0. */ 375 unsigned int 376 hook_uint_mode_0 (machine_mode m ATTRIBUTE_UNUSED) 377 { 378 return 0; 379 } 380 381 /* Generic hook that takes three trees and returns the last one as is. */ 382 tree 383 hook_tree_tree_tree_tree_3rd_identity (tree a ATTRIBUTE_UNUSED, 384 tree b ATTRIBUTE_UNUSED, tree c) 385 { 386 return c; 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 t ATTRIBUTE_UNUSED) 406 { 407 return NULL; 408 } 409 410 tree 411 hook_tree_tree_int_treep_bool_null (tree t0 ATTRIBUTE_UNUSED, 412 int i ATTRIBUTE_UNUSED, 413 tree *p ATTRIBUTE_UNUSED, 414 bool ignore ATTRIBUTE_UNUSED) 415 { 416 return NULL; 417 } 418 419 tree 420 hook_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, tree t1 ATTRIBUTE_UNUSED) 421 { 422 return NULL; 423 } 424 425 tree 426 hook_tree_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, 427 tree t1 ATTRIBUTE_UNUSED, 428 tree t2 ATTRIBUTE_UNUSED) 429 { 430 return NULL; 431 } 432 433 /* Generic hook that takes an rtx_insn *and returns a NULL string. */ 434 const char * 435 hook_constcharptr_const_rtx_insn_null (const rtx_insn *insn ATTRIBUTE_UNUSED) 436 { 437 return NULL; 438 } 439 440 const char * 441 hook_constcharptr_const_tree_const_tree_null (const_tree t0 ATTRIBUTE_UNUSED, 442 const_tree t1 ATTRIBUTE_UNUSED) 443 { 444 return NULL; 445 } 446 447 const char * 448 hook_constcharptr_int_const_tree_null (int i ATTRIBUTE_UNUSED, 449 const_tree t0 ATTRIBUTE_UNUSED) 450 { 451 return NULL; 452 } 453 454 const char * 455 hook_constcharptr_int_const_tree_const_tree_null (int i ATTRIBUTE_UNUSED, 456 const_tree t0 ATTRIBUTE_UNUSED, 457 const_tree t1 ATTRIBUTE_UNUSED) 458 { 459 return NULL; 460 } 461 462 /* Generic hook that takes a const_tree and returns NULL_TREE. */ 463 tree 464 hook_tree_const_tree_null (const_tree t ATTRIBUTE_UNUSED) 465 { 466 return NULL; 467 } 468 469 /* Generic hook that takes a rtx_insn * and an int and returns a bool. */ 470 471 bool 472 hook_bool_rtx_insn_int_false (rtx_insn *insn ATTRIBUTE_UNUSED, 473 int mode ATTRIBUTE_UNUSED) 474 { 475 return false; 476 } 477 478 /* Generic hook that takes a rtx_insn * and an int and returns void. */ 479 480 void 481 hook_void_rtx_insn_int (rtx_insn *insn ATTRIBUTE_UNUSED, 482 int mode ATTRIBUTE_UNUSED) 483 { 484 } 485 486 /* Generic hook that takes a struct gcc_options * and returns void. */ 487 488 void 489 hook_void_gcc_optionsp (struct gcc_options *opts ATTRIBUTE_UNUSED) 490 { 491 } 492