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. */ 32void 33hook_void_void (void) 34{ 35} 36 37/* Generic hook that takes no arguments and returns false. */ 38bool 39hook_bool_void_false (void) 40{ 41 return false; 42} 43 44/* Generic hook that takes no arguments and returns true. */ 45bool 46hook_bool_void_true (void) 47{ 48 return true; 49} 50 51/* Generic hook that takes (bool) and returns false. */ 52bool 53hook_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. */ 59bool 60hook_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. */ 67bool 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. */ 74bool 75hook_bool_mode_false (machine_mode mode ATTRIBUTE_UNUSED) 76{ 77 return false; 78} 79 80/* Generic hook that takes (machine_mode) and returns true. */ 81bool 82hook_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. */ 88bool 89hook_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. */ 96bool 97hook_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. */ 104bool 105hook_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. */ 112bool 113hook_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. */ 120bool 121hook_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. */ 129bool 130hook_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. */ 137void 138hook_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. */ 144void 145hook_void_FILEptr_constcharptr_const_tree (FILE *, const char *, const_tree) 146{ 147} 148 149/* Generic hook that takes (FILE *, rtx) and returns false. */ 150bool 151hook_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. */ 159bool 160hook_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. */ 166bool 167hook_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 175bool 176hook_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 184bool 185default_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 193int 194hook_int_uint_mode_1 (unsigned int a ATTRIBUTE_UNUSED, 195 machine_mode b ATTRIBUTE_UNUSED) 196{ 197 return 1; 198} 199 200int 201hook_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. */ 207int 208hook_int_const_tree_const_tree_1 (const_tree a ATTRIBUTE_UNUSED, const_tree b ATTRIBUTE_UNUSED) 209{ 210 return 1; 211} 212 213int 214hook_int_rtx_0 (rtx a ATTRIBUTE_UNUSED) 215{ 216 return 0; 217} 218 219int 220hook_int_rtx_1 (rtx) 221{ 222 return 1; 223} 224 225int 226hook_int_rtx_insn_unreachable (rtx_insn *) 227{ 228 gcc_unreachable (); 229} 230 231int 232hook_int_rtx_bool_0 (rtx a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED) 233{ 234 return 0; 235} 236 237int 238hook_int_rtx_mode_as_bool_0 (rtx, machine_mode, addr_space_t, bool) 239{ 240 return 0; 241} 242 243unsigned int 244hook_uint_void_0 (void) 245{ 246 return 0; 247} 248 249void 250hook_void_tree (tree a ATTRIBUTE_UNUSED) 251{ 252} 253 254void 255hook_void_rtx_tree (rtx, tree) 256{ 257} 258 259void 260hook_void_constcharptr (const char *a ATTRIBUTE_UNUSED) 261{ 262} 263 264void 265hook_void_tree_treeptr (tree a ATTRIBUTE_UNUSED, tree *b ATTRIBUTE_UNUSED) 266{ 267} 268 269void 270hook_void_int_int (int a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED) 271{ 272} 273 274bool 275hook_bool_tree_false (tree a ATTRIBUTE_UNUSED) 276{ 277 return false; 278} 279 280bool 281hook_bool_const_tree_false (const_tree a ATTRIBUTE_UNUSED) 282{ 283 return false; 284} 285 286bool 287hook_bool_tree_true (tree a ATTRIBUTE_UNUSED) 288{ 289 return true; 290} 291 292bool 293hook_bool_const_tree_true (const_tree a ATTRIBUTE_UNUSED) 294{ 295 return true; 296} 297 298bool 299hook_bool_tree_tree_false (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED) 300{ 301 return false; 302} 303 304bool 305hook_bool_tree_tree_true (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED) 306{ 307 return true; 308} 309 310bool 311hook_bool_tree_bool_false (tree a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED) 312{ 313 return false; 314} 315 316bool 317hook_bool_rtx_insn_true (rtx_insn *insn ATTRIBUTE_UNUSED) 318{ 319 return true; 320} 321 322bool 323hook_bool_rtx_false (rtx a ATTRIBUTE_UNUSED) 324{ 325 return false; 326} 327 328bool 329hook_bool_uintp_uintp_false (unsigned int *a ATTRIBUTE_UNUSED, 330 unsigned int *b ATTRIBUTE_UNUSED) 331{ 332 return false; 333} 334 335bool 336hook_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 346bool 347hook_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. */ 354rtx 355hook_rtx_rtx_identity (rtx x) 356{ 357 return x; 358} 359 360/* Generic hook that takes an rtx and returns NULL_RTX. */ 361rtx 362hook_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. */ 368rtx 369hook_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. */ 375unsigned int 376hook_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. */ 382tree 383hook_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. */ 390const char * 391hook_constcharptr_void_null (void) 392{ 393 return NULL; 394} 395 396/* Generic hook that takes no arguments and returns a NULL string. */ 397char * 398hook_charptr_void_null (void) 399{ 400 return NULL; 401} 402 403/* Generic hook that takes a tree and returns a NULL string. */ 404const char * 405hook_constcharptr_const_tree_null (const_tree t ATTRIBUTE_UNUSED) 406{ 407 return NULL; 408} 409 410tree 411hook_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 419tree 420hook_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, tree t1 ATTRIBUTE_UNUSED) 421{ 422 return NULL; 423} 424 425tree 426hook_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. */ 434const char * 435hook_constcharptr_const_rtx_insn_null (const rtx_insn *insn ATTRIBUTE_UNUSED) 436{ 437 return NULL; 438} 439 440const char * 441hook_constcharptr_const_tree_const_tree_null (const_tree t0 ATTRIBUTE_UNUSED, 442 const_tree t1 ATTRIBUTE_UNUSED) 443{ 444 return NULL; 445} 446 447const char * 448hook_constcharptr_int_const_tree_null (int i ATTRIBUTE_UNUSED, 449 const_tree t0 ATTRIBUTE_UNUSED) 450{ 451 return NULL; 452} 453 454const char * 455hook_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. */ 463tree 464hook_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 471bool 472hook_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 480void 481hook_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 488void 489hook_void_gcc_optionsp (struct gcc_options *opts ATTRIBUTE_UNUSED) 490{ 491} 492