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 (FILE *, const char *) and does nothing.  */
 130 void
 131 hook_void_FILEptr_constcharptr (FILE *, const char *)
 132 {
 133 }
 134
 135 /* Generic hook that takes (FILE *, const char *, constr_tree *) and does
 136    nothing.  */
 137 void
 138 hook_void_FILEptr_constcharptr_const_tree (FILE *, const char *, const_tree)
 139 {
 140 }
 141
 142 /* Generic hook that takes (FILE *, rtx) and returns false.  */
 143 bool
 144 hook_bool_FILEptr_rtx_false (FILE *, rtx)
 145 {
 146   return false;
 147 }
 148
 149 /* Generic hook that takes (gimple_stmt_iterator *) and returns
 150    false.  */
 151 bool
 152 hook_bool_gsiptr_false (gimple_stmt_iterator *)
 153 {
 154   return false;
 155 }
 156
 157 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook.  */
 158 bool
 159 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree, HOST_WIDE_INT,
 160                                                HOST_WIDE_INT, const_tree)
 161 {
 162   return false;
 163 }
 164
 165 bool
 166 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree, HOST_WIDE_INT,
 167                                               HOST_WIDE_INT, const_tree)
 168 {
 169   return true;
 170 }
 171
 172 bool
 173 default_can_output_mi_thunk_no_vcall (const_tree, HOST_WIDE_INT,
 174                                       HOST_WIDE_INT c, const_tree)
 175 {
 176   return c == 0;
 177 }
 178
 179 int
 180 hook_int_uint_mode_1 (unsigned int, machine_mode)
 181 {
 182   return 1;
 183 }
 184
 185 int
 186 hook_int_const_tree_0 (const_tree)
 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, const_tree)
 194 {
 195   return 1;
 196 }
 197
 198 int
 199 hook_int_rtx_0 (rtx)
 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_insn_unreachable (rtx_insn *)
 212 {
 213   gcc_unreachable ();
 214 }
 215
 216 int
 217 hook_int_rtx_bool_0 (rtx, bool)
 218 {
 219   return 0;
 220 }
 221
 222 int
 223 hook_int_rtx_mode_as_bool_0 (rtx, 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)
 236 {
 237 }
 238
 239 void
 240 hook_void_rtx_tree (rtx, tree)
 241 {
 242 }
 243
 244 void
 245 hook_void_constcharptr (const char *)
 246 {
 247 }
 248
 249 void
 250 hook_void_tree_treeptr (tree, tree *)
 251 {
 252 }
 253
 254 void
 255 hook_void_int_int (int, int)
 256 {
 257 }
 258
 259 bool
 260 hook_bool_tree_false (tree)
 261 {
 262   return false;
 263 }
 264
 265 bool
 266 hook_bool_const_tree_false (const_tree)
 267 {
 268   return false;
 269 }
 270
 271 bool
 272 hook_bool_tree_true (tree)
 273 {
 274   return true;
 275 }
 276
 277 bool
 278 hook_bool_const_tree_true (const_tree)
 279 {
 280   return true;
 281 }
 282
 283 bool
 284 hook_bool_tree_tree_false (tree, tree)
 285 {
 286   return false;
 287 }
 288
 289 bool
 290 hook_bool_tree_tree_true (tree, tree)
 291 {
 292   return true;
 293 }
 294
 295 bool
 296 hook_bool_tree_bool_false (tree, bool)
 297 {
 298   return false;
 299 }
 300
 301 bool
 302 hook_bool_rtx_insn_true (rtx_insn *)
 303 {
 304   return true;
 305 }
 306
 307 bool
 308 hook_bool_rtx_false (rtx)
 309 {
 310   return false;
 311 }
 312
 313 bool
 314 hook_bool_uintp_uintp_false (unsigned int *, unsigned int *)
 315 {
 316   return false;
 317 }
 318
 319 bool
 320 hook_bool_rtx_mode_int_int_intp_bool_false (rtx, machine_mode, int, int,
 321                                             int *, bool)
 322 {
 323   return false;
 324 }
 325
 326 bool
 327 hook_bool_wint_wint_uint_bool_true (const widest_int &, const widest_int &,
 328                                     unsigned int, bool)
 329 {
 330   return true;
 331 }
 332
 333 /* Generic hook that takes an rtx and returns it.  */
 334 rtx
 335 hook_rtx_rtx_identity (rtx x)
 336 {
 337   return x;
 338 }
 339
 340 /* Generic hook that takes an rtx and returns NULL_RTX.  */
 341 rtx
 342 hook_rtx_rtx_null (rtx)
 343 {
 344   return NULL;
 345 }
 346
 347 /* Generic hook that takes a tree and an int and returns NULL_RTX.  */
 348 rtx
 349 hook_rtx_tree_int_null (tree, int)
 350 {
 351   return NULL;
 352 }
 353
 354 /* Generic hook that takes a machine mode and returns an unsigned int 0.  */
 355 unsigned int
 356 hook_uint_mode_0 (machine_mode)
 357 {
 358   return 0;
 359 }
 360
 361 /* Generic hook that takes no arguments and returns a NULL const string.  */
 362 const char *
 363 hook_constcharptr_void_null (void)
 364 {
 365   return NULL;
 366 }
 367
 368 /* Generic hook that takes no arguments and returns a NULL string.  */
 369 char *
 370 hook_charptr_void_null (void)
 371 {
 372   return NULL;
 373 }
 374
 375 /* Generic hook that takes a tree and returns a NULL string.  */
 376 const char *
 377 hook_constcharptr_const_tree_null (const_tree)
 378 {
 379   return NULL;
 380 }
 381
 382 tree
 383 hook_tree_tree_int_treep_bool_null (tree, int, tree *, bool)
 384 {
 385   return NULL;
 386 }
 387
 388 tree
 389 hook_tree_tree_tree_null (tree, tree)
 390 {
 391   return NULL;
 392 }
 393
 394 tree
 395 hook_tree_tree_tree_tree_null (tree, tree, tree)
 396 {
 397   return NULL;
 398 }
 399
 400 /* Generic hook that takes an rtx_insn *and returns a NULL string.  */
 401 const char *
 402 hook_constcharptr_const_rtx_insn_null (const rtx_insn *)
 403 {
 404   return NULL;
 405 }
 406
 407 const char *
 408 hook_constcharptr_const_tree_const_tree_null (const_tree, const_tree)
 409 {
 410   return NULL;
 411 }
 412
 413 const char *
 414 hook_constcharptr_int_const_tree_null (int, const_tree)
 415 {
 416   return NULL;
 417 }
 418
 419 const char *
 420 hook_constcharptr_int_const_tree_const_tree_null (int, const_tree, const_tree)
 421 {
 422   return NULL;
 423 }
 424
 425 /* Generic hook that takes a const_tree and returns NULL_TREE.  */
 426 tree
 427 hook_tree_const_tree_null (const_tree)
 428 {
 429   return NULL;
 430 }
 431
 432 /* Generic hook that takes no arguments and returns a NULL_TREE.  */
 433 tree
 434 hook_tree_void_null (void)
 435 {
 436   return NULL;
 437 }
 438
 439 /* Generic hook that takes a rtx_insn * and an int and returns a bool.  */
 440
 441 bool
 442 hook_bool_rtx_insn_int_false (rtx_insn *, int)
 443 {
 444   return false;
 445 }
 446
 447 /* Generic hook that takes a rtx_insn * and an int and returns void.  */
 448
 449 void
 450 hook_void_rtx_insn_int (rtx_insn *, int)
 451 {
 452 }
 453
 454 /* Generic hook that takes a struct gcc_options * and returns void.  */
 455
 456 void
 457 hook_void_gcc_optionsp (struct gcc_options *)
 458 {
 459 }
 460
 461 /* Generic hook that takes an unsigned int, an unsigned int pointer and
 462    returns false.  */
 463
 464 bool
 465 hook_bool_uint_uintp_false (unsigned int, unsigned int *)
 466 {
 467   return false;
 468 }
 469
 470 /* Generic hook that takes a register class and returns false.  */
 471 bool
 472 hook_bool_reg_class_t_false (reg_class_t regclass ATTRIBUTE_UNUSED)
 473 {
 474   return false;
 475 }
 476