libfuncs.h (LTI_synchronize): New libfunc_index.
[official-gcc.git] / gcc / hooks.c
blob50761b69ca551c5fe784afe45ec4224225bd83d4
1 /* General-purpose hooks.
2 Copyright (C) 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
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.
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.
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/>.
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! */
22 /* This file contains generic hooks that can be used as defaults for
23 target or language-dependent hook initializers. */
25 #include "config.h"
26 #include "system.h"
27 #include "coretypes.h"
28 #include "tm.h"
29 #include "hooks.h"
31 /* Generic hook that does absolutely zappo. */
32 void
33 hook_void_void (void)
37 /* Generic hook that takes no arguments and returns false. */
38 bool
39 hook_bool_void_false (void)
41 return false;
44 /* Generic hook that takes no arguments and returns true. */
45 bool
46 hook_bool_void_true (void)
48 return true;
51 /* Generic hook that takes no arguments and returns NO_REGS. */
52 int
53 hook_int_void_no_regs (void)
55 return NO_REGS;
58 /* Generic hook that takes (bool) and returns false. */
59 bool
60 hook_bool_bool_false (bool a ATTRIBUTE_UNUSED)
62 return false;
65 /* Generic hook that takes (enum machine_mode) and returns false. */
66 bool
67 hook_bool_mode_false (enum machine_mode mode ATTRIBUTE_UNUSED)
69 return false;
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)
77 return false;
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)
85 return true;
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)
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)
101 return false;
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)
110 return true;
113 bool
114 hook_bool_constcharptr_size_t_false (const char *a ATTRIBUTE_UNUSED,
115 size_t b ATTRIBUTE_UNUSED)
117 return false;
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)
125 return true;
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)
134 return c == 0;
138 hook_int_const_tree_0 (const_tree a ATTRIBUTE_UNUSED)
140 return 0;
143 /* ??? Used for comp_type_attributes, which ought to return bool. */
145 hook_int_const_tree_const_tree_1 (const_tree a ATTRIBUTE_UNUSED, const_tree b ATTRIBUTE_UNUSED)
147 return 1;
151 hook_int_rtx_0 (rtx a ATTRIBUTE_UNUSED)
153 return 0;
157 hook_int_size_t_constcharptr_int_0 (size_t a ATTRIBUTE_UNUSED,
158 const char *b ATTRIBUTE_UNUSED,
159 int c ATTRIBUTE_UNUSED)
161 return 0;
164 unsigned int
165 hook_uint_uint_constcharptrptr_0 (unsigned int a ATTRIBUTE_UNUSED,
166 const char **b ATTRIBUTE_UNUSED)
168 return 0;
171 void
172 hook_void_tree (tree a ATTRIBUTE_UNUSED)
176 void
177 hook_void_constcharptr (const char *a ATTRIBUTE_UNUSED)
181 void
182 hook_void_tree_treeptr (tree a ATTRIBUTE_UNUSED, tree *b ATTRIBUTE_UNUSED)
186 bool
187 hook_bool_tree_false (tree a ATTRIBUTE_UNUSED)
189 return false;
192 bool
193 hook_bool_const_tree_false (const_tree a ATTRIBUTE_UNUSED)
195 return false;
198 bool
199 hook_bool_tree_true (tree a ATTRIBUTE_UNUSED)
201 return true;
204 bool
205 hook_bool_const_tree_true (const_tree a ATTRIBUTE_UNUSED)
207 return true;
210 bool
211 hook_bool_tree_tree_false (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED)
213 return false;
216 bool
217 hook_bool_tree_bool_false (tree a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED)
219 return false;
222 bool
223 hook_bool_rtx_false (rtx a ATTRIBUTE_UNUSED)
225 return false;
228 bool
229 hook_bool_uintp_uintp_false (unsigned int *a ATTRIBUTE_UNUSED,
230 unsigned int *b ATTRIBUTE_UNUSED)
232 return false;
235 bool
236 hook_bool_rtx_int_int_intp_false (rtx a ATTRIBUTE_UNUSED,
237 int b ATTRIBUTE_UNUSED,
238 int c ATTRIBUTE_UNUSED,
239 int *d ATTRIBUTE_UNUSED)
241 return false;
244 /* Generic hook that takes an rtx and returns it. */
246 hook_rtx_rtx_identity (rtx x)
248 return x;
251 /* Generic hook that takes an rtx and returns NULL_RTX. */
253 hook_rtx_rtx_null (rtx x ATTRIBUTE_UNUSED)
255 return NULL;
258 /* Generic hook that takes a tree and an int and returns NULL_RTX. */
260 hook_rtx_tree_int_null (tree a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED)
262 return NULL;
265 /* Generic hook that takes three trees and returns the last one as is. */
266 tree
267 hook_tree_tree_tree_tree_3rd_identity (tree a ATTRIBUTE_UNUSED,
268 tree b ATTRIBUTE_UNUSED, tree c)
270 return c;
273 /* Generic hook that takes a tree and returns a NULL string. */
274 const char *
275 hook_constcharptr_const_tree_null (const_tree t ATTRIBUTE_UNUSED)
277 return NULL;
280 tree
281 hook_tree_tree_tree_bool_null (tree t0 ATTRIBUTE_UNUSED,
282 tree t1 ATTRIBUTE_UNUSED,
283 bool ignore ATTRIBUTE_UNUSED)
285 return NULL;
288 tree
289 hook_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, tree t1 ATTRIBUTE_UNUSED)
291 return NULL;
294 tree
295 hook_tree_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED,
296 tree t1 ATTRIBUTE_UNUSED,
297 tree t2 ATTRIBUTE_UNUSED)
299 return NULL;
302 /* Generic hook that takes a rtx and returns a NULL string. */
303 const char *
304 hook_constcharptr_const_rtx_null (const_rtx r ATTRIBUTE_UNUSED)
306 return NULL;
309 const char *
310 hook_constcharptr_const_tree_const_tree_null (const_tree t0 ATTRIBUTE_UNUSED,
311 const_tree t1 ATTRIBUTE_UNUSED)
313 return NULL;
316 const char *
317 hook_constcharptr_int_const_tree_null (int i ATTRIBUTE_UNUSED,
318 const_tree t0 ATTRIBUTE_UNUSED)
320 return NULL;
323 const char *
324 hook_constcharptr_int_const_tree_const_tree_null (int i ATTRIBUTE_UNUSED,
325 const_tree t0 ATTRIBUTE_UNUSED,
326 const_tree t1 ATTRIBUTE_UNUSED)
328 return NULL;