gcc/hooks.c

   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 (rtx, rtx) and returns true.  */
 121 bool
 122 hook_bool_const_rtx_const_rtx_true (const_rtx follower ATTRIBUTE_UNUSED,
 123                                     const_rtx followee ATTRIBUTE_UNUSED)
 124 {
 125   return true;
 126 }
 127
 128 /* Generic hook that takes (enum machine_mode, unsigned HOST_WIDE_INT)
 129    and returns false.  */
 130 bool
 131 hook_bool_mode_uhwi_false (enum machine_mode mode ATTRIBUTE_UNUSED,
 132                            unsigned HOST_WIDE_INT value ATTRIBUTE_UNUSED)
 133 {
 134   return false;
 135 }
 136
 137 /* Generic hook that takes (FILE *, const char *) and does nothing.  */
 138 void
 139 hook_void_FILEptr_constcharptr (FILE *a ATTRIBUTE_UNUSED, const char *b ATTRIBUTE_UNUSED)
 140 {
 141 }
 142
 143 /* Generic hook that takes (FILE *, rtx) and returns false.  */
 144 bool
 145 hook_bool_FILEptr_rtx_false (FILE *a ATTRIBUTE_UNUSED,
 146                              rtx b ATTRIBUTE_UNUSED)
 147 {
 148   return false;
 149 }
 150
 151 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook.  */
 152 bool
 153 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree a ATTRIBUTE_UNUSED,
 154                                                HOST_WIDE_INT b ATTRIBUTE_UNUSED,
 155                                                HOST_WIDE_INT c ATTRIBUTE_UNUSED,
 156                                                const_tree d ATTRIBUTE_UNUSED)
 157 {
 158   return false;
 159 }
 160
 161 bool
 162 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree a ATTRIBUTE_UNUSED,
 163                                               HOST_WIDE_INT b ATTRIBUTE_UNUSED,
 164                                               HOST_WIDE_INT c ATTRIBUTE_UNUSED,
 165                                               const_tree d ATTRIBUTE_UNUSED)
 166 {
 167   return true;
 168 }
 169
 170 bool
 171 default_can_output_mi_thunk_no_vcall (const_tree a ATTRIBUTE_UNUSED,
 172                                       HOST_WIDE_INT b ATTRIBUTE_UNUSED,
 173                                       HOST_WIDE_INT c,
 174                                       const_tree d ATTRIBUTE_UNUSED)
 175 {
 176   return c == 0;
 177 }
 178
 179 int
 180 hook_int_uint_mode_1 (unsigned int a ATTRIBUTE_UNUSED,
 181                       enum machine_mode b ATTRIBUTE_UNUSED)
 182 {
 183   return 1;
 184 }
 185
 186 int
 187 hook_int_const_tree_0 (const_tree a ATTRIBUTE_UNUSED)
 188 {
 189   return 0;
 190 }
 191
 192 /* ??? Used for comp_type_attributes, which ought to return bool.  */
 193 int
 194 hook_int_const_tree_const_tree_1 (const_tree a ATTRIBUTE_UNUSED, const_tree b ATTRIBUTE_UNUSED)
 195 {
 196   return 1;
 197 }
 198
 199 int
 200 hook_int_rtx_0 (rtx a ATTRIBUTE_UNUSED)
 201 {
 202   return 0;
 203 }
 204
 205 int
 206 hook_int_rtx_bool_0 (rtx a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED)
 207 {
 208   return 0;
 209 }
 210
 211 int
 212 hook_int_rtx_mode_as_bool_0 (rtx, enum machine_mode, addr_space_t, bool)
 213 {
 214   return 0;
 215 }
 216
 217 unsigned int
 218 hook_uint_void_0 (void)
 219 {
 220   return 0;
 221 }
 222
 223 void
 224 hook_void_tree (tree a ATTRIBUTE_UNUSED)
 225 {
 226 }
 227
 228 void
 229 hook_void_constcharptr (const char *a ATTRIBUTE_UNUSED)
 230 {
 231 }
 232
 233 void
 234 hook_void_tree_treeptr (tree a ATTRIBUTE_UNUSED, tree *b ATTRIBUTE_UNUSED)
 235 {
 236 }
 237
 238 void
 239 hook_void_int_int (int a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED)
 240 {
 241 }
 242
 243 bool
 244 hook_bool_tree_false (tree a ATTRIBUTE_UNUSED)
 245 {
 246   return false;
 247 }
 248
 249 bool
 250 hook_bool_const_tree_false (const_tree a ATTRIBUTE_UNUSED)
 251 {
 252   return false;
 253 }
 254
 255 bool
 256 hook_bool_tree_true (tree a ATTRIBUTE_UNUSED)
 257 {
 258   return true;
 259 }
 260
 261 bool
 262 hook_bool_const_tree_true (const_tree a ATTRIBUTE_UNUSED)
 263 {
 264   return true;
 265 }
 266
 267 bool
 268 hook_bool_tree_tree_false (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED)
 269 {
 270   return false;
 271 }
 272
 273 bool
 274 hook_bool_tree_tree_true (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED)
 275 {
 276   return true;
 277 }
 278
 279 bool
 280 hook_bool_tree_bool_false (tree a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED)
 281 {
 282   return false;
 283 }
 284
 285 bool
 286 hook_bool_rtx_true (rtx a ATTRIBUTE_UNUSED)
 287 {
 288   return true;
 289 }
 290
 291 bool
 292 hook_bool_rtx_false (rtx a ATTRIBUTE_UNUSED)
 293 {
 294   return false;
 295 }
 296
 297 bool
 298 hook_bool_uintp_uintp_false (unsigned int *a ATTRIBUTE_UNUSED,
 299                              unsigned int *b ATTRIBUTE_UNUSED)
 300 {
 301   return false;
 302 }
 303
 304 bool
 305 hook_bool_rtx_int_int_int_intp_bool_false (rtx a ATTRIBUTE_UNUSED,
 306                                            int b ATTRIBUTE_UNUSED,
 307                                            int c ATTRIBUTE_UNUSED,
 308                                            int d ATTRIBUTE_UNUSED,
 309                                            int *e ATTRIBUTE_UNUSED,
 310                                            bool speed_p ATTRIBUTE_UNUSED)
 311 {
 312   return false;
 313 }
 314
 315 /* Generic hook that takes an rtx and returns it.  */
 316 rtx
 317 hook_rtx_rtx_identity (rtx x)
 318 {
 319   return x;
 320 }
 321
 322 /* Generic hook that takes an rtx and returns NULL_RTX.  */
 323 rtx
 324 hook_rtx_rtx_null (rtx x ATTRIBUTE_UNUSED)
 325 {
 326   return NULL;
 327 }
 328
 329 /* Generic hook that takes a tree and an int and returns NULL_RTX.  */
 330 rtx
 331 hook_rtx_tree_int_null (tree a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED)
 332 {
 333   return NULL;
 334 }
 335
 336 /* Generic hook that takes three trees and returns the last one as is.  */
 337 tree
 338 hook_tree_tree_tree_tree_3rd_identity (tree a ATTRIBUTE_UNUSED,
 339                                        tree b ATTRIBUTE_UNUSED, tree c)
 340 {
 341   return c;
 342 }
 343
 344 /* Generic hook that takes a tree and returns a NULL string.  */
 345 const char *
 346 hook_constcharptr_const_tree_null (const_tree t ATTRIBUTE_UNUSED)
 347 {
 348   return NULL;
 349 }
 350
 351 tree
 352 hook_tree_tree_int_treep_bool_null (tree t0 ATTRIBUTE_UNUSED,
 353                                     int i ATTRIBUTE_UNUSED,
 354                                     tree *p ATTRIBUTE_UNUSED,
 355                                     bool ignore ATTRIBUTE_UNUSED)
 356 {
 357   return NULL;
 358 }
 359
 360 tree
 361 hook_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, tree t1 ATTRIBUTE_UNUSED)
 362 {
 363   return NULL;
 364 }
 365
 366 tree
 367 hook_tree_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED,
 368                                tree t1 ATTRIBUTE_UNUSED,
 369                                tree t2 ATTRIBUTE_UNUSED)
 370 {
 371   return NULL;
 372 }
 373
 374 /* Generic hook that takes a rtx and returns a NULL string.  */
 375 const char *
 376 hook_constcharptr_const_rtx_null (const_rtx r ATTRIBUTE_UNUSED)
 377 {
 378   return NULL;
 379 }
 380
 381 const char *
 382 hook_constcharptr_const_tree_const_tree_null (const_tree t0 ATTRIBUTE_UNUSED,
 383                                               const_tree t1 ATTRIBUTE_UNUSED)
 384 {
 385   return NULL;
 386 }
 387
 388 const char *
 389 hook_constcharptr_int_const_tree_null (int i ATTRIBUTE_UNUSED,
 390                                        const_tree t0 ATTRIBUTE_UNUSED)
 391 {
 392   return NULL;
 393 }
 394
 395 const char *
 396 hook_constcharptr_int_const_tree_const_tree_null (int i ATTRIBUTE_UNUSED,
 397                                                   const_tree t0 ATTRIBUTE_UNUSED,
 398                                                   const_tree t1 ATTRIBUTE_UNUSED)
 399 {
 400   return NULL;
 401 }
 402
 403 /* Generic hook that takes a const_tree and returns NULL_TREE.  */
 404 tree
 405 hook_tree_const_tree_null (const_tree t ATTRIBUTE_UNUSED)
 406 {
 407   return NULL;
 408 }
 409
 410 /* Generic hook that takes a rtx and an int and returns a bool.  */
 411
 412 bool
 413 hook_bool_rtx_int_false (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
 414 {
 415   return false;
 416 }
 417
 418 /* Generic hook that takes a rtx and an int and returns void.  */
 419
 420 void
 421 hook_void_rtx_int (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
 422 {
 423 }
 424
 425 /* Generic hook that takes a struct gcc_options * and returns void.  */
 426
 427 void
 428 hook_void_gcc_optionsp (struct gcc_options *opts ATTRIBUTE_UNUSED)
 429 {
 430 }