gcc/hooks.c

   1 /* General-purpose hooks.
   2    Copyright (C) 2002, 2003, 2004, 2005, 2007 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 no arguments and returns NO_REGS.  */
  52 int
  53 hook_int_void_no_regs (void)
  54 {
  55   return NO_REGS;
  56 }
  57
  58 /* Generic hook that takes (bool) and returns false.  */
  59 bool
  60 hook_bool_bool_false (bool a ATTRIBUTE_UNUSED)
  61 {
  62   return false;
  63 }
  64
  65 /* Generic hook that takes (enum machine_mode) and returns false.  */
  66 bool
  67 hook_bool_mode_false (enum machine_mode mode ATTRIBUTE_UNUSED)
  68 {
  69   return false;
  70 }
  71
  72 /* Generic hook that takes (enum machine_mode, rtx) and returns false.  */
  73 bool
  74 hook_bool_mode_const_rtx_false (enum machine_mode mode ATTRIBUTE_UNUSED,
  75                                 const_rtx value ATTRIBUTE_UNUSED)
  76 {
  77   return false;
  78 }
  79
  80 /* Generic hook that takes (enum machine_mode, rtx) and returns true.  */
  81 bool
  82 hook_bool_mode_const_rtx_true (enum machine_mode mode ATTRIBUTE_UNUSED,
  83                                const_rtx value ATTRIBUTE_UNUSED)
  84 {
  85   return true;
  86 }
  87
  88 /* Generic hook that takes (FILE *, const char *) and does nothing.  */
  89 void
  90 hook_void_FILEptr_constcharptr (FILE *a ATTRIBUTE_UNUSED, const char *b ATTRIBUTE_UNUSED)
  91 {
  92 }
  93
  94 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook.  */
  95 bool
  96 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree a ATTRIBUTE_UNUSED,
  97                                                HOST_WIDE_INT b ATTRIBUTE_UNUSED,
  98                                                HOST_WIDE_INT c ATTRIBUTE_UNUSED,
  99                                                const_tree d ATTRIBUTE_UNUSED)
 100 {
 101   return false;
 102 }
 103
 104 bool
 105 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree a ATTRIBUTE_UNUSED,
 106                                               HOST_WIDE_INT b ATTRIBUTE_UNUSED,
 107                                               HOST_WIDE_INT c ATTRIBUTE_UNUSED,
 108                                               const_tree d ATTRIBUTE_UNUSED)
 109 {
 110   return true;
 111 }
 112
 113 bool
 114 hook_bool_constcharptr_size_t_false (const char *a ATTRIBUTE_UNUSED,
 115                                      size_t b ATTRIBUTE_UNUSED)
 116 {
 117   return false;
 118 }
 119
 120 bool
 121 hook_bool_size_t_constcharptr_int_true (size_t a ATTRIBUTE_UNUSED,
 122                                         const char *b ATTRIBUTE_UNUSED,
 123                                         int c ATTRIBUTE_UNUSED)
 124 {
 125   return true;
 126 }
 127
 128 bool
 129 default_can_output_mi_thunk_no_vcall (const_tree a ATTRIBUTE_UNUSED,
 130                                       HOST_WIDE_INT b ATTRIBUTE_UNUSED,
 131                                       HOST_WIDE_INT c,
 132                                       const_tree d ATTRIBUTE_UNUSED)
 133 {
 134   return c == 0;
 135 }
 136
 137 int
 138 hook_int_const_tree_0 (const_tree a ATTRIBUTE_UNUSED)
 139 {
 140   return 0;
 141 }
 142
 143 /* ??? Used for comp_type_attributes, which ought to return bool.  */
 144 int
 145 hook_int_const_tree_const_tree_1 (const_tree a ATTRIBUTE_UNUSED, const_tree b ATTRIBUTE_UNUSED)
 146 {
 147   return 1;
 148 }
 149
 150 int
 151 hook_int_rtx_0 (rtx a ATTRIBUTE_UNUSED)
 152 {
 153   return 0;
 154 }
 155
 156 int
 157 hook_int_rtx_bool_0 (rtx a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED)
 158 {
 159   return 0;
 160 }
 161
 162 int
 163 hook_int_size_t_constcharptr_int_0 (size_t a ATTRIBUTE_UNUSED,
 164                                     const char *b ATTRIBUTE_UNUSED,
 165                                     int c ATTRIBUTE_UNUSED)
 166 {
 167   return 0;
 168 }
 169
 170 unsigned int
 171 hook_uint_uint_constcharptrptr_0 (unsigned int a ATTRIBUTE_UNUSED,
 172                                   const char **b ATTRIBUTE_UNUSED)
 173 {
 174   return 0;
 175 }
 176
 177 void
 178 hook_void_tree (tree a ATTRIBUTE_UNUSED)
 179 {
 180 }
 181
 182 void
 183 hook_void_constcharptr (const char *a ATTRIBUTE_UNUSED)
 184 {
 185 }
 186
 187 void
 188 hook_void_tree_treeptr (tree a ATTRIBUTE_UNUSED, tree *b ATTRIBUTE_UNUSED)
 189 {
 190 }
 191
 192 bool
 193 hook_bool_tree_false (tree a ATTRIBUTE_UNUSED)
 194 {
 195   return false;
 196 }
 197
 198 bool
 199 hook_bool_const_tree_false (const_tree a ATTRIBUTE_UNUSED)
 200 {
 201   return false;
 202 }
 203
 204 bool
 205 hook_bool_tree_true (tree a ATTRIBUTE_UNUSED)
 206 {
 207   return true;
 208 }
 209
 210 bool
 211 hook_bool_const_tree_true (const_tree a ATTRIBUTE_UNUSED)
 212 {
 213   return true;
 214 }
 215
 216 bool
 217 hook_bool_tree_tree_false (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED)
 218 {
 219   return false;
 220 }
 221
 222 bool
 223 hook_bool_tree_bool_false (tree a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED)
 224 {
 225   return false;
 226 }
 227
 228 bool
 229 hook_bool_rtx_false (rtx a ATTRIBUTE_UNUSED)
 230 {
 231   return false;
 232 }
 233
 234 bool
 235 hook_bool_uintp_uintp_false (unsigned int *a ATTRIBUTE_UNUSED,
 236                              unsigned int *b ATTRIBUTE_UNUSED)
 237 {
 238   return false;
 239 }
 240
 241 bool
 242 hook_bool_rtx_int_int_intp_bool_false (rtx a ATTRIBUTE_UNUSED,
 243                                        int b ATTRIBUTE_UNUSED,
 244                                        int c ATTRIBUTE_UNUSED,
 245                                        int *d ATTRIBUTE_UNUSED,
 246                                        bool speed_p ATTRIBUTE_UNUSED)
 247 {
 248   return false;
 249 }
 250
 251 /* Generic hook that takes an rtx and returns it.  */
 252 rtx
 253 hook_rtx_rtx_identity (rtx x)
 254 {
 255   return x;
 256 }
 257
 258 /* Generic hook that takes an rtx and returns NULL_RTX.  */
 259 rtx
 260 hook_rtx_rtx_null (rtx x ATTRIBUTE_UNUSED)
 261 {
 262   return NULL;
 263 }
 264
 265 /* Generic hook that takes a tree and an int and returns NULL_RTX.  */
 266 rtx
 267 hook_rtx_tree_int_null (tree a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED)
 268 {
 269   return NULL;
 270 }
 271
 272 /* Generic hook that takes three trees and returns the last one as is.  */
 273 tree
 274 hook_tree_tree_tree_tree_3rd_identity (tree a ATTRIBUTE_UNUSED,
 275                                        tree b ATTRIBUTE_UNUSED, tree c)
 276 {
 277   return c;
 278 }
 279
 280 /* Generic hook that takes a tree and returns a NULL string.  */
 281 const char *
 282 hook_constcharptr_const_tree_null (const_tree t ATTRIBUTE_UNUSED)
 283 {
 284   return NULL;
 285 }
 286
 287 tree
 288 hook_tree_tree_tree_bool_null (tree t0 ATTRIBUTE_UNUSED,
 289                                tree t1 ATTRIBUTE_UNUSED,
 290                                bool ignore ATTRIBUTE_UNUSED)
 291 {
 292   return NULL;
 293 }
 294
 295 tree
 296 hook_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, tree t1 ATTRIBUTE_UNUSED)
 297 {
 298   return NULL;
 299 }
 300
 301 tree
 302 hook_tree_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED,
 303                                tree t1 ATTRIBUTE_UNUSED,
 304                                tree t2 ATTRIBUTE_UNUSED)
 305 {
 306   return NULL;
 307 }
 308
 309 /* Generic hook that takes a rtx and returns a NULL string.  */
 310 const char *
 311 hook_constcharptr_const_rtx_null (const_rtx r ATTRIBUTE_UNUSED)
 312 {
 313   return NULL;
 314 }
 315
 316 const char *
 317 hook_constcharptr_const_tree_const_tree_null (const_tree t0 ATTRIBUTE_UNUSED,
 318                                               const_tree t1 ATTRIBUTE_UNUSED)
 319 {
 320   return NULL;
 321 }
 322
 323 const char *
 324 hook_constcharptr_int_const_tree_null (int i ATTRIBUTE_UNUSED,
 325                                        const_tree t0 ATTRIBUTE_UNUSED)
 326 {
 327   return NULL;
 328 }
 329
 330 const char *
 331 hook_constcharptr_int_const_tree_const_tree_null (int i ATTRIBUTE_UNUSED,
 332                                                   const_tree t0 ATTRIBUTE_UNUSED,
 333                                                   const_tree t1 ATTRIBUTE_UNUSED)
 334 {
 335   return NULL;
 336 }