1/* General-purpose hooks. 2 Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008, 2009 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. */ 33void 34hook_void_void (void) 35{ 36} 37 38/* Generic hook that takes no arguments and returns false. */ 39bool 40hook_bool_void_false (void) 41{ 42 return false; 43} 44 45/* Generic hook that takes no arguments and returns true. */ 46bool 47hook_bool_void_true (void) 48{ 49 return true; 50} 51 52/* Generic hook that takes (bool) and returns false. */ 53bool 54hook_bool_bool_false (bool a ATTRIBUTE_UNUSED) 55{ 56 return false; 57} 58 59/* Generic hook that takes const int, const int) and returns true. */ 60bool hook_bool_const_int_const_int_true (const int a ATTRIBUTE_UNUSED, 61 const int b ATTRIBUTE_UNUSED) 62{ 63 return true; 64} 65 66/* Generic hook that takes (enum machine_mode) and returns false. */ 67bool 68hook_bool_mode_false (enum machine_mode mode ATTRIBUTE_UNUSED) 69{ 70 return false; 71} 72 73/* Generic hook that takes (enum machine_mode, rtx) and returns false. */ 74bool 75hook_bool_mode_const_rtx_false (enum machine_mode mode ATTRIBUTE_UNUSED, 76 const_rtx value ATTRIBUTE_UNUSED) 77{ 78 return false; 79} 80 81/* Generic hook that takes (enum machine_mode, rtx) and returns true. */ 82bool 83hook_bool_mode_const_rtx_true (enum machine_mode mode ATTRIBUTE_UNUSED, 84 const_rtx value ATTRIBUTE_UNUSED) 85{ 86 return true; 87} 88 89/* Generic hook that takes (FILE *, const char *) and does nothing. */ 90void 91hook_void_FILEptr_constcharptr (FILE *a ATTRIBUTE_UNUSED, const char *b ATTRIBUTE_UNUSED) 92{ 93} 94 95/* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook. */ 96bool 97hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree a ATTRIBUTE_UNUSED, 98 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 99 HOST_WIDE_INT c ATTRIBUTE_UNUSED, 100 const_tree d ATTRIBUTE_UNUSED) 101{ 102 return false; 103} 104 105bool 106hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree a ATTRIBUTE_UNUSED, 107 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 108 HOST_WIDE_INT c ATTRIBUTE_UNUSED, 109 const_tree d ATTRIBUTE_UNUSED) 110{ 111 return true; 112} 113 114bool 115hook_bool_constcharptr_size_t_false (const char *a ATTRIBUTE_UNUSED, 116 size_t b ATTRIBUTE_UNUSED) 117{ 118 return false; 119} 120 121bool 122hook_bool_size_t_constcharptr_int_true (size_t a ATTRIBUTE_UNUSED, 123 const char *b ATTRIBUTE_UNUSED, 124 int c ATTRIBUTE_UNUSED) 125{ 126 return true; 127} 128 129bool 130default_can_output_mi_thunk_no_vcall (const_tree a ATTRIBUTE_UNUSED, 131 HOST_WIDE_INT b ATTRIBUTE_UNUSED, 132 HOST_WIDE_INT c, 133 const_tree d ATTRIBUTE_UNUSED) 134{ 135 return c == 0; 136} 137 138int 139hook_int_const_tree_0 (const_tree a ATTRIBUTE_UNUSED) 140{ 141 return 0; 142} 143 144/* ??? Used for comp_type_attributes, which ought to return bool. */ 145int 146hook_int_const_tree_const_tree_1 (const_tree a ATTRIBUTE_UNUSED, const_tree b ATTRIBUTE_UNUSED) 147{ 148 return 1; 149} 150 151int 152hook_int_rtx_0 (rtx a ATTRIBUTE_UNUSED) 153{ 154 return 0; 155} 156 157int 158hook_int_rtx_bool_0 (rtx a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED) 159{ 160 return 0; 161} 162 163int 164hook_int_size_t_constcharptr_int_0 (size_t a ATTRIBUTE_UNUSED, 165 const char *b ATTRIBUTE_UNUSED, 166 int c ATTRIBUTE_UNUSED) 167{ 168 return 0; 169} 170 171unsigned int 172hook_uint_uint_constcharptrptr_0 (unsigned int a ATTRIBUTE_UNUSED, 173 const char **b ATTRIBUTE_UNUSED) 174{ 175 return 0; 176} 177 178void 179hook_void_tree (tree a ATTRIBUTE_UNUSED) 180{ 181} 182 183void 184hook_void_constcharptr (const char *a ATTRIBUTE_UNUSED) 185{ 186} 187 188void 189hook_void_tree_treeptr (tree a ATTRIBUTE_UNUSED, tree *b ATTRIBUTE_UNUSED) 190{ 191} 192 193bool 194hook_bool_tree_false (tree a ATTRIBUTE_UNUSED) 195{ 196 return false; 197} 198 199bool 200hook_bool_const_tree_false (const_tree a ATTRIBUTE_UNUSED) 201{ 202 return false; 203} 204 205bool 206hook_bool_tree_true (tree a ATTRIBUTE_UNUSED) 207{ 208 return true; 209} 210 211bool 212hook_bool_const_tree_true (const_tree a ATTRIBUTE_UNUSED) 213{ 214 return true; 215} 216 217bool 218hook_bool_tree_tree_false (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED) 219{ 220 return false; 221} 222 223bool 224hook_bool_tree_tree_true (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED) 225{ 226 return true; 227} 228 229bool 230hook_bool_tree_bool_false (tree a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED) 231{ 232 return false; 233} 234 235bool 236hook_bool_rtx_false (rtx a ATTRIBUTE_UNUSED) 237{ 238 return false; 239} 240 241bool 242hook_bool_uintp_uintp_false (unsigned int *a ATTRIBUTE_UNUSED, 243 unsigned int *b ATTRIBUTE_UNUSED) 244{ 245 return false; 246} 247 248bool 249hook_bool_rtx_int_int_intp_bool_false (rtx a ATTRIBUTE_UNUSED, 250 int b ATTRIBUTE_UNUSED, 251 int c ATTRIBUTE_UNUSED, 252 int *d ATTRIBUTE_UNUSED, 253 bool speed_p ATTRIBUTE_UNUSED) 254{ 255 return false; 256} 257 258/* Generic hook that takes an rtx and returns it. */ 259rtx 260hook_rtx_rtx_identity (rtx x) 261{ 262 return x; 263} 264 265/* Generic hook that takes an rtx and returns NULL_RTX. */ 266rtx 267hook_rtx_rtx_null (rtx x ATTRIBUTE_UNUSED) 268{ 269 return NULL; 270} 271 272/* Generic hook that takes a tree and an int and returns NULL_RTX. */ 273rtx 274hook_rtx_tree_int_null (tree a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED) 275{ 276 return NULL; 277} 278 279/* Generic hook that takes three trees and returns the last one as is. */ 280tree 281hook_tree_tree_tree_tree_3rd_identity (tree a ATTRIBUTE_UNUSED, 282 tree b ATTRIBUTE_UNUSED, tree c) 283{ 284 return c; 285} 286 287/* Generic hook that takes a tree and returns a NULL string. */ 288const char * 289hook_constcharptr_const_tree_null (const_tree t ATTRIBUTE_UNUSED) 290{ 291 return NULL; 292} 293 294tree 295hook_tree_tree_tree_bool_null (tree t0 ATTRIBUTE_UNUSED, 296 tree t1 ATTRIBUTE_UNUSED, 297 bool ignore ATTRIBUTE_UNUSED) 298{ 299 return NULL; 300} 301 302tree 303hook_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, tree t1 ATTRIBUTE_UNUSED) 304{ 305 return NULL; 306} 307 308tree 309hook_tree_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, 310 tree t1 ATTRIBUTE_UNUSED, 311 tree t2 ATTRIBUTE_UNUSED) 312{ 313 return NULL; 314} 315 316/* Generic hook that takes a rtx and returns a NULL string. */ 317const char * 318hook_constcharptr_const_rtx_null (const_rtx r ATTRIBUTE_UNUSED) 319{ 320 return NULL; 321} 322 323const char * 324hook_constcharptr_const_tree_const_tree_null (const_tree t0 ATTRIBUTE_UNUSED, 325 const_tree t1 ATTRIBUTE_UNUSED) 326{ 327 return NULL; 328} 329 330const char * 331hook_constcharptr_int_const_tree_null (int i ATTRIBUTE_UNUSED, 332 const_tree t0 ATTRIBUTE_UNUSED) 333{ 334 return NULL; 335} 336 337const char * 338hook_constcharptr_int_const_tree_const_tree_null (int i ATTRIBUTE_UNUSED, 339 const_tree t0 ATTRIBUTE_UNUSED, 340 const_tree t1 ATTRIBUTE_UNUSED) 341{ 342 return NULL; 343} 344 345/* Generic hook that takes a const_tree and returns NULL_TREE. */ 346tree 347hook_tree_const_tree_null (const_tree t ATTRIBUTE_UNUSED) 348{ 349 return NULL; 350} 351