1 /* General-purpose hooks. 2 Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010, 2011 3 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify it 6 under the terms of the GNU General Public License as published by the 7 Free Software Foundation; either version 3, or (at your option) any 8 later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program; see the file COPYING3. If not see 17 <http://www.gnu.org/licenses/>. 18 19 In other words, you are welcome to use, share and improve this program. 20 You are forbidden to forbid anyone else to use, share and improve 21 what you give them. Help stamp out software-hoarding! */ 22 23 /* This file contains generic hooks that can be used as defaults for 24 target or language-dependent hook initializers. */ 25 26 #include "config.h" 27 #include "system.h" 28 #include "coretypes.h" 29 #include "tm.h" 30 #include "hooks.h" 31 32 /* Generic hook that does absolutely zappo. */ 33 void 34 hook_void_void (void) 35 { 36 } 37 38 /* Generic hook that takes no arguments and returns false. */ 39 bool 40 hook_bool_void_false (void) 41 { 42 return false; 43 } 44 45 /* Generic hook that takes no arguments and returns true. */ 46 bool 47 hook_bool_void_true (void) 48 { 49 return true; 50 } 51 52 /* Generic hook that takes (bool) and returns false. */ 53 bool 54 hook_bool_bool_false (bool a ATTRIBUTE_UNUSED) 55 { 56 return false; 57 } 58 59 /* Generic hook that takes (bool, struct gcc_options *) and returns false. */ 60 bool 61 hook_bool_bool_gcc_optionsp_false (bool a ATTRIBUTE_UNUSED, 62 struct gcc_options *opts ATTRIBUTE_UNUSED) 63 { 64 return false; 65 } 66 67 /* Generic hook that takes const int, const int) and returns true. */ 68 bool hook_bool_const_int_const_int_true (const int a ATTRIBUTE_UNUSED, 69 const int b ATTRIBUTE_UNUSED) 70 { 71 return true; 72 } 73 74 /* Generic hook that takes (enum machine_mode) and returns false. */ 75 bool 76 hook_bool_mode_false (enum machine_mode mode ATTRIBUTE_UNUSED) 77 { 78 return false; 79 } 80 81 /* Generic hook that takes (enum machine_mode) and returns true. */ 82 bool 83 hook_bool_mode_true (enum machine_mode mode ATTRIBUTE_UNUSED) 84 { 85 return true; 86 } 87 88 /* Generic hook that takes (enum machine_mode, const_rtx) and returns false. */ 89 bool 90 hook_bool_mode_const_rtx_false (enum machine_mode mode ATTRIBUTE_UNUSED, 91 const_rtx value ATTRIBUTE_UNUSED) 92 { 93 return false; 94 } 95 96 /* Generic hook that takes (enum machine_mode, const_rtx) and returns true. */ 97 bool 98 hook_bool_mode_const_rtx_true (enum machine_mode mode ATTRIBUTE_UNUSED, 99 const_rtx value ATTRIBUTE_UNUSED) 100 { 101 return true; 102 } 103 104 /* Generic hook that takes (enum machine_mode, rtx) and returns false. */ 105 bool 106 hook_bool_mode_rtx_false (enum machine_mode mode ATTRIBUTE_UNUSED, 107 rtx value ATTRIBUTE_UNUSED) 108 { 109 return false; 110 } 111 112 /* Generic hook that takes (enum machine_mode, rtx) and returns true. */ 113 bool 114 hook_bool_mode_rtx_true (enum machine_mode mode ATTRIBUTE_UNUSED, 115 rtx value ATTRIBUTE_UNUSED) 116 { 117 return true; 118 } 119 120 /* Generic hook that takes (enum machine_mode, unsigned HOST_WIDE_INT) 121 and returns false. */ 122 bool 123 hook_bool_mode_uhwi_false (enum machine_mode mode ATTRIBUTE_UNUSED, 124 unsigned HOST_WIDE_INT value ATTRIBUTE_UNUSED) 125 { 126 return false; 127 } 128 129 /* Generic hook that takes (FILE *, const char *) and does nothing. */ 130 void 131 hook_void_FILEptr_constcharptr (FILE *a ATTRIBUTE_UNUSED, const char *b ATTRIBUTE_UNUSED) 132 { 133 } 134 135 /* Generic hook that takes (FILE *, rtx) and returns false. */ 136 bool 137 hook_bool_FILEptr_rtx_false (FILE *a ATTRIBUTE_UNUSED, 138 rtx b ATTRIBUTE_UNUSED) 139 { 140 return false; 141 } 142 143 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook. */ 144 bool 145 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree a ATTRIBUTE_UNUSED, 146 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 147 HOST_WIDE_INT c ATTRIBUTE_UNUSED, 148 const_tree d ATTRIBUTE_UNUSED) 149 { 150 return false; 151 } 152 153 bool 154 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree a ATTRIBUTE_UNUSED, 155 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 156 HOST_WIDE_INT c ATTRIBUTE_UNUSED, 157 const_tree d ATTRIBUTE_UNUSED) 158 { 159 return true; 160 } 161 162 bool 163 default_can_output_mi_thunk_no_vcall (const_tree a ATTRIBUTE_UNUSED, 164 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 165 HOST_WIDE_INT c, 166 const_tree d ATTRIBUTE_UNUSED) 167 { 168 return c == 0; 169 } 170 171 int 172 hook_int_uint_mode_1 (unsigned int a ATTRIBUTE_UNUSED, 173 enum machine_mode b ATTRIBUTE_UNUSED) 174 { 175 return 1; 176 } 177 178 int 179 hook_int_const_tree_0 (const_tree a ATTRIBUTE_UNUSED) 180 { 181 return 0; 182 } 183 184 /* ??? Used for comp_type_attributes, which ought to return bool. */ 185 int 186 hook_int_const_tree_const_tree_1 (const_tree a ATTRIBUTE_UNUSED, const_tree b ATTRIBUTE_UNUSED) 187 { 188 return 1; 189 } 190 191 int 192 hook_int_rtx_0 (rtx a ATTRIBUTE_UNUSED) 193 { 194 return 0; 195 } 196 197 int 198 hook_int_rtx_bool_0 (rtx a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED) 199 { 200 return 0; 201 } 202 203 unsigned int 204 hook_uint_void_0 (void) 205 { 206 return 0; 207 } 208 209 void 210 hook_void_tree (tree a ATTRIBUTE_UNUSED) 211 { 212 } 213 214 void 215 hook_void_constcharptr (const char *a ATTRIBUTE_UNUSED) 216 { 217 } 218 219 void 220 hook_void_tree_treeptr (tree a ATTRIBUTE_UNUSED, tree *b ATTRIBUTE_UNUSED) 221 { 222 } 223 224 void 225 hook_void_int_int (int a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED) 226 { 227 } 228 229 bool 230 hook_bool_tree_false (tree a ATTRIBUTE_UNUSED) 231 { 232 return false; 233 } 234 235 bool 236 hook_bool_const_tree_false (const_tree a ATTRIBUTE_UNUSED) 237 { 238 return false; 239 } 240 241 bool 242 hook_bool_tree_true (tree a ATTRIBUTE_UNUSED) 243 { 244 return true; 245 } 246 247 bool 248 hook_bool_const_tree_true (const_tree a ATTRIBUTE_UNUSED) 249 { 250 return true; 251 } 252 253 bool 254 hook_bool_tree_tree_false (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED) 255 { 256 return false; 257 } 258 259 bool 260 hook_bool_tree_tree_true (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED) 261 { 262 return true; 263 } 264 265 bool 266 hook_bool_tree_bool_false (tree a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED) 267 { 268 return false; 269 } 270 271 bool 272 hook_bool_rtx_false (rtx a ATTRIBUTE_UNUSED) 273 { 274 return false; 275 } 276 277 bool 278 hook_bool_uintp_uintp_false (unsigned int *a ATTRIBUTE_UNUSED, 279 unsigned int *b ATTRIBUTE_UNUSED) 280 { 281 return false; 282 } 283 284 bool 285 hook_bool_rtx_int_int_int_intp_bool_false (rtx a ATTRIBUTE_UNUSED, 286 int b ATTRIBUTE_UNUSED, 287 int c ATTRIBUTE_UNUSED, 288 int d ATTRIBUTE_UNUSED, 289 int *e ATTRIBUTE_UNUSED, 290 bool speed_p ATTRIBUTE_UNUSED) 291 { 292 return false; 293 } 294 295 /* Generic hook that takes an rtx and returns it. */ 296 rtx 297 hook_rtx_rtx_identity (rtx x) 298 { 299 return x; 300 } 301 302 /* Generic hook that takes an rtx and returns NULL_RTX. */ 303 rtx 304 hook_rtx_rtx_null (rtx x ATTRIBUTE_UNUSED) 305 { 306 return NULL; 307 } 308 309 /* Generic hook that takes a tree and an int and returns NULL_RTX. */ 310 rtx 311 hook_rtx_tree_int_null (tree a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED) 312 { 313 return NULL; 314 } 315 316 /* Generic hook that takes three trees and returns the last one as is. */ 317 tree 318 hook_tree_tree_tree_tree_3rd_identity (tree a ATTRIBUTE_UNUSED, 319 tree b ATTRIBUTE_UNUSED, tree c) 320 { 321 return c; 322 } 323 324 /* Generic hook that takes a tree and returns a NULL string. */ 325 const char * 326 hook_constcharptr_const_tree_null (const_tree t ATTRIBUTE_UNUSED) 327 { 328 return NULL; 329 } 330 331 tree 332 hook_tree_tree_int_treep_bool_null (tree t0 ATTRIBUTE_UNUSED, 333 int i ATTRIBUTE_UNUSED, 334 tree *p ATTRIBUTE_UNUSED, 335 bool ignore ATTRIBUTE_UNUSED) 336 { 337 return NULL; 338 } 339 340 tree 341 hook_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, tree t1 ATTRIBUTE_UNUSED) 342 { 343 return NULL; 344 } 345 346 tree 347 hook_tree_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, 348 tree t1 ATTRIBUTE_UNUSED, 349 tree t2 ATTRIBUTE_UNUSED) 350 { 351 return NULL; 352 } 353 354 /* Generic hook that takes a rtx and returns a NULL string. */ 355 const char * 356 hook_constcharptr_const_rtx_null (const_rtx r ATTRIBUTE_UNUSED) 357 { 358 return NULL; 359 } 360 361 const char * 362 hook_constcharptr_const_tree_const_tree_null (const_tree t0 ATTRIBUTE_UNUSED, 363 const_tree t1 ATTRIBUTE_UNUSED) 364 { 365 return NULL; 366 } 367 368 const char * 369 hook_constcharptr_int_const_tree_null (int i ATTRIBUTE_UNUSED, 370 const_tree t0 ATTRIBUTE_UNUSED) 371 { 372 return NULL; 373 } 374 375 const char * 376 hook_constcharptr_int_const_tree_const_tree_null (int i ATTRIBUTE_UNUSED, 377 const_tree t0 ATTRIBUTE_UNUSED, 378 const_tree t1 ATTRIBUTE_UNUSED) 379 { 380 return NULL; 381 } 382 383 /* Generic hook that takes a const_tree and returns NULL_TREE. */ 384 tree 385 hook_tree_const_tree_null (const_tree t ATTRIBUTE_UNUSED) 386 { 387 return NULL; 388 } 389 390 /* Generic hook that takes a rtx and an int and returns a bool. */ 391 392 bool 393 hook_bool_rtx_int_false (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED) 394 { 395 return false; 396 } 397 398 /* Generic hook that takes a rtx and an int and returns void. */ 399 400 void 401 hook_void_rtx_int (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED) 402 { 403 } 404 405 /* Generic hook that takes a struct gcc_options * and returns void. */ 406 407 void 408 hook_void_gcc_optionsp (struct gcc_options *opts ATTRIBUTE_UNUSED) 409 { 410 } 411