1 /* General-purpose hooks. 2 Copyright (C) 2002-2013 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 (enum machine_mode) and returns false. */ 74 bool 75 hook_bool_mode_false (enum machine_mode mode ATTRIBUTE_UNUSED) 76 { 77 return false; 78 } 79 80 /* Generic hook that takes (enum machine_mode) and returns true. */ 81 bool 82 hook_bool_mode_true (enum machine_mode mode ATTRIBUTE_UNUSED) 83 { 84 return true; 85 } 86 87 /* Generic hook that takes (enum machine_mode, const_rtx) and returns false. */ 88 bool 89 hook_bool_mode_const_rtx_false (enum machine_mode mode ATTRIBUTE_UNUSED, 90 const_rtx value ATTRIBUTE_UNUSED) 91 { 92 return false; 93 } 94 95 /* Generic hook that takes (enum machine_mode, const_rtx) and returns true. */ 96 bool 97 hook_bool_mode_const_rtx_true (enum machine_mode mode ATTRIBUTE_UNUSED, 98 const_rtx value ATTRIBUTE_UNUSED) 99 { 100 return true; 101 } 102 103 /* Generic hook that takes (enum machine_mode, rtx) and returns false. */ 104 bool 105 hook_bool_mode_rtx_false (enum machine_mode mode ATTRIBUTE_UNUSED, 106 rtx value ATTRIBUTE_UNUSED) 107 { 108 return false; 109 } 110 111 /* Generic hook that takes (enum machine_mode, rtx) and returns true. */ 112 bool 113 hook_bool_mode_rtx_true (enum machine_mode mode ATTRIBUTE_UNUSED, 114 rtx value ATTRIBUTE_UNUSED) 115 { 116 return true; 117 } 118 119 /* Generic hook that takes (rtx, rtx) and returns true. */ 120 bool 121 hook_bool_const_rtx_const_rtx_true (const_rtx follower ATTRIBUTE_UNUSED, 122 const_rtx followee ATTRIBUTE_UNUSED) 123 { 124 return true; 125 } 126 127 /* Generic hook that takes (enum machine_mode, unsigned HOST_WIDE_INT) 128 and returns false. */ 129 bool 130 hook_bool_mode_uhwi_false (enum 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 *, rtx) and returns false. */ 143 bool 144 hook_bool_FILEptr_rtx_false (FILE *a ATTRIBUTE_UNUSED, 145 rtx b ATTRIBUTE_UNUSED) 146 { 147 return false; 148 } 149 150 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook. */ 151 bool 152 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree a ATTRIBUTE_UNUSED, 153 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 154 HOST_WIDE_INT c ATTRIBUTE_UNUSED, 155 const_tree d ATTRIBUTE_UNUSED) 156 { 157 return false; 158 } 159 160 bool 161 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree a ATTRIBUTE_UNUSED, 162 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 163 HOST_WIDE_INT c ATTRIBUTE_UNUSED, 164 const_tree d ATTRIBUTE_UNUSED) 165 { 166 return true; 167 } 168 169 bool 170 default_can_output_mi_thunk_no_vcall (const_tree a ATTRIBUTE_UNUSED, 171 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 172 HOST_WIDE_INT c, 173 const_tree d ATTRIBUTE_UNUSED) 174 { 175 return c == 0; 176 } 177 178 int 179 hook_int_uint_mode_1 (unsigned int a ATTRIBUTE_UNUSED, 180 enum machine_mode b ATTRIBUTE_UNUSED) 181 { 182 return 1; 183 } 184 185 int 186 hook_int_const_tree_0 (const_tree a ATTRIBUTE_UNUSED) 187 { 188 return 0; 189 } 190 191 /* ??? Used for comp_type_attributes, which ought to return bool. */ 192 int 193 hook_int_const_tree_const_tree_1 (const_tree a ATTRIBUTE_UNUSED, const_tree b ATTRIBUTE_UNUSED) 194 { 195 return 1; 196 } 197 198 int 199 hook_int_rtx_0 (rtx a ATTRIBUTE_UNUSED) 200 { 201 return 0; 202 } 203 204 int 205 hook_int_rtx_1 (rtx) 206 { 207 return 1; 208 } 209 210 int 211 hook_int_rtx_unreachable (rtx) 212 { 213 gcc_unreachable (); 214 } 215 216 int 217 hook_int_rtx_bool_0 (rtx a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED) 218 { 219 return 0; 220 } 221 222 int 223 hook_int_rtx_mode_as_bool_0 (rtx, enum machine_mode, addr_space_t, bool) 224 { 225 return 0; 226 } 227 228 unsigned int 229 hook_uint_void_0 (void) 230 { 231 return 0; 232 } 233 234 void 235 hook_void_tree (tree a ATTRIBUTE_UNUSED) 236 { 237 } 238 239 void 240 hook_void_constcharptr (const char *a ATTRIBUTE_UNUSED) 241 { 242 } 243 244 void 245 hook_void_tree_treeptr (tree a ATTRIBUTE_UNUSED, tree *b ATTRIBUTE_UNUSED) 246 { 247 } 248 249 void 250 hook_void_int_int (int a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED) 251 { 252 } 253 254 bool 255 hook_bool_tree_false (tree a ATTRIBUTE_UNUSED) 256 { 257 return false; 258 } 259 260 bool 261 hook_bool_const_tree_false (const_tree a ATTRIBUTE_UNUSED) 262 { 263 return false; 264 } 265 266 bool 267 hook_bool_tree_true (tree a ATTRIBUTE_UNUSED) 268 { 269 return true; 270 } 271 272 bool 273 hook_bool_const_tree_true (const_tree a ATTRIBUTE_UNUSED) 274 { 275 return true; 276 } 277 278 bool 279 hook_bool_tree_tree_false (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED) 280 { 281 return false; 282 } 283 284 bool 285 hook_bool_tree_tree_true (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED) 286 { 287 return true; 288 } 289 290 bool 291 hook_bool_tree_bool_false (tree a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED) 292 { 293 return false; 294 } 295 296 bool 297 hook_bool_rtx_true (rtx a ATTRIBUTE_UNUSED) 298 { 299 return true; 300 } 301 302 bool 303 hook_bool_rtx_false (rtx a ATTRIBUTE_UNUSED) 304 { 305 return false; 306 } 307 308 bool 309 hook_bool_uintp_uintp_false (unsigned int *a ATTRIBUTE_UNUSED, 310 unsigned int *b ATTRIBUTE_UNUSED) 311 { 312 return false; 313 } 314 315 bool 316 hook_bool_rtx_int_int_int_intp_bool_false (rtx a ATTRIBUTE_UNUSED, 317 int b ATTRIBUTE_UNUSED, 318 int c ATTRIBUTE_UNUSED, 319 int d ATTRIBUTE_UNUSED, 320 int *e ATTRIBUTE_UNUSED, 321 bool speed_p ATTRIBUTE_UNUSED) 322 { 323 return false; 324 } 325 326 /* Generic hook that takes an rtx and returns it. */ 327 rtx 328 hook_rtx_rtx_identity (rtx x) 329 { 330 return x; 331 } 332 333 /* Generic hook that takes an rtx and returns NULL_RTX. */ 334 rtx 335 hook_rtx_rtx_null (rtx x ATTRIBUTE_UNUSED) 336 { 337 return NULL; 338 } 339 340 /* Generic hook that takes a tree and an int and returns NULL_RTX. */ 341 rtx 342 hook_rtx_tree_int_null (tree a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED) 343 { 344 return NULL; 345 } 346 347 /* Generic hook that takes three trees and returns the last one as is. */ 348 tree 349 hook_tree_tree_tree_tree_3rd_identity (tree a ATTRIBUTE_UNUSED, 350 tree b ATTRIBUTE_UNUSED, tree c) 351 { 352 return c; 353 } 354 355 /* Generic hook that takes no arguments and returns a NULL string. */ 356 const char * 357 hook_constcharptr_void_null (void) 358 { 359 return NULL; 360 } 361 362 /* Generic hook that takes a tree and returns a NULL string. */ 363 const char * 364 hook_constcharptr_const_tree_null (const_tree t ATTRIBUTE_UNUSED) 365 { 366 return NULL; 367 } 368 369 tree 370 hook_tree_tree_int_treep_bool_null (tree t0 ATTRIBUTE_UNUSED, 371 int i ATTRIBUTE_UNUSED, 372 tree *p ATTRIBUTE_UNUSED, 373 bool ignore ATTRIBUTE_UNUSED) 374 { 375 return NULL; 376 } 377 378 tree 379 hook_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, tree t1 ATTRIBUTE_UNUSED) 380 { 381 return NULL; 382 } 383 384 tree 385 hook_tree_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, 386 tree t1 ATTRIBUTE_UNUSED, 387 tree t2 ATTRIBUTE_UNUSED) 388 { 389 return NULL; 390 } 391 392 /* Generic hook that takes a rtx and returns a NULL string. */ 393 const char * 394 hook_constcharptr_const_rtx_null (const_rtx r ATTRIBUTE_UNUSED) 395 { 396 return NULL; 397 } 398 399 const char * 400 hook_constcharptr_const_tree_const_tree_null (const_tree t0 ATTRIBUTE_UNUSED, 401 const_tree t1 ATTRIBUTE_UNUSED) 402 { 403 return NULL; 404 } 405 406 const char * 407 hook_constcharptr_int_const_tree_null (int i ATTRIBUTE_UNUSED, 408 const_tree t0 ATTRIBUTE_UNUSED) 409 { 410 return NULL; 411 } 412 413 const char * 414 hook_constcharptr_int_const_tree_const_tree_null (int i ATTRIBUTE_UNUSED, 415 const_tree t0 ATTRIBUTE_UNUSED, 416 const_tree t1 ATTRIBUTE_UNUSED) 417 { 418 return NULL; 419 } 420 421 /* Generic hook that takes a const_tree and returns NULL_TREE. */ 422 tree 423 hook_tree_const_tree_null (const_tree t ATTRIBUTE_UNUSED) 424 { 425 return NULL; 426 } 427 428 /* Generic hook that takes a rtx and an int and returns a bool. */ 429 430 bool 431 hook_bool_rtx_int_false (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED) 432 { 433 return false; 434 } 435 436 /* Generic hook that takes a rtx and an int and returns void. */ 437 438 void 439 hook_void_rtx_int (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED) 440 { 441 } 442 443 /* Generic hook that takes a struct gcc_options * and returns void. */ 444 445 void 446 hook_void_gcc_optionsp (struct gcc_options *opts ATTRIBUTE_UNUSED) 447 { 448 } 449