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
hook_void_void(void)34 hook_void_void (void)
35 {
36 }
37
38 /* Generic hook that takes no arguments and returns false. */
39 bool
hook_bool_void_false(void)40 hook_bool_void_false (void)
41 {
42 return false;
43 }
44
45 /* Generic hook that takes no arguments and returns true. */
46 bool
hook_bool_void_true(void)47 hook_bool_void_true (void)
48 {
49 return true;
50 }
51
52 /* Generic hook that takes (bool) and returns false. */
53 bool
hook_bool_bool_false(bool a ATTRIBUTE_UNUSED)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
hook_bool_bool_gcc_optionsp_false(bool a ATTRIBUTE_UNUSED,struct gcc_options * opts ATTRIBUTE_UNUSED)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. */
hook_bool_const_int_const_int_true(const int a ATTRIBUTE_UNUSED,const int b ATTRIBUTE_UNUSED)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
hook_bool_mode_false(enum machine_mode mode ATTRIBUTE_UNUSED)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
hook_bool_mode_true(enum machine_mode mode ATTRIBUTE_UNUSED)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
hook_bool_mode_const_rtx_false(enum machine_mode mode ATTRIBUTE_UNUSED,const_rtx value ATTRIBUTE_UNUSED)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
hook_bool_mode_const_rtx_true(enum machine_mode mode ATTRIBUTE_UNUSED,const_rtx value ATTRIBUTE_UNUSED)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
hook_bool_mode_rtx_false(enum machine_mode mode ATTRIBUTE_UNUSED,rtx value ATTRIBUTE_UNUSED)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
hook_bool_mode_rtx_true(enum machine_mode mode ATTRIBUTE_UNUSED,rtx value ATTRIBUTE_UNUSED)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 (enum machine_mode, unsigned HOST_WIDE_INT)
121 and returns false. */
122 bool
hook_bool_mode_uhwi_false(enum machine_mode mode ATTRIBUTE_UNUSED,unsigned HOST_WIDE_INT value ATTRIBUTE_UNUSED)123 hook_bool_mode_uhwi_false (enum machine_mode mode ATTRIBUTE_UNUSED,
124 unsigned HOST_WIDE_INT value ATTRIBUTE_UNUSED)
125 {
126 return false;
127 }
128
129 /* Generic hook that takes (FILE *, const char *) and does nothing. */
130 void
hook_void_FILEptr_constcharptr(FILE * a ATTRIBUTE_UNUSED,const char * b ATTRIBUTE_UNUSED)131 hook_void_FILEptr_constcharptr (FILE *a ATTRIBUTE_UNUSED, const char *b ATTRIBUTE_UNUSED)
132 {
133 }
134
135 /* Generic hook that takes (FILE *, rtx) and returns false. */
136 bool
hook_bool_FILEptr_rtx_false(FILE * a ATTRIBUTE_UNUSED,rtx b ATTRIBUTE_UNUSED)137 hook_bool_FILEptr_rtx_false (FILE *a ATTRIBUTE_UNUSED,
138 rtx b ATTRIBUTE_UNUSED)
139 {
140 return false;
141 }
142
143 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook. */
144 bool
hook_bool_const_tree_hwi_hwi_const_tree_false(const_tree a ATTRIBUTE_UNUSED,HOST_WIDE_INT b ATTRIBUTE_UNUSED,HOST_WIDE_INT c ATTRIBUTE_UNUSED,const_tree d ATTRIBUTE_UNUSED)145 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree a ATTRIBUTE_UNUSED,
146 HOST_WIDE_INT b ATTRIBUTE_UNUSED,
147 HOST_WIDE_INT c ATTRIBUTE_UNUSED,
148 const_tree d ATTRIBUTE_UNUSED)
149 {
150 return false;
151 }
152
153 bool
hook_bool_const_tree_hwi_hwi_const_tree_true(const_tree a ATTRIBUTE_UNUSED,HOST_WIDE_INT b ATTRIBUTE_UNUSED,HOST_WIDE_INT c ATTRIBUTE_UNUSED,const_tree d ATTRIBUTE_UNUSED)154 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree a ATTRIBUTE_UNUSED,
155 HOST_WIDE_INT b ATTRIBUTE_UNUSED,
156 HOST_WIDE_INT c ATTRIBUTE_UNUSED,
157 const_tree d ATTRIBUTE_UNUSED)
158 {
159 return true;
160 }
161
162 bool
default_can_output_mi_thunk_no_vcall(const_tree a ATTRIBUTE_UNUSED,HOST_WIDE_INT b ATTRIBUTE_UNUSED,HOST_WIDE_INT c,const_tree d ATTRIBUTE_UNUSED)163 default_can_output_mi_thunk_no_vcall (const_tree a ATTRIBUTE_UNUSED,
164 HOST_WIDE_INT b ATTRIBUTE_UNUSED,
165 HOST_WIDE_INT c,
166 const_tree d ATTRIBUTE_UNUSED)
167 {
168 return c == 0;
169 }
170
171 int
hook_int_uint_mode_1(unsigned int a ATTRIBUTE_UNUSED,enum machine_mode b ATTRIBUTE_UNUSED)172 hook_int_uint_mode_1 (unsigned int a ATTRIBUTE_UNUSED,
173 enum machine_mode b ATTRIBUTE_UNUSED)
174 {
175 return 1;
176 }
177
178 int
hook_int_const_tree_0(const_tree a ATTRIBUTE_UNUSED)179 hook_int_const_tree_0 (const_tree a ATTRIBUTE_UNUSED)
180 {
181 return 0;
182 }
183
184 /* ??? Used for comp_type_attributes, which ought to return bool. */
185 int
hook_int_const_tree_const_tree_1(const_tree a ATTRIBUTE_UNUSED,const_tree b ATTRIBUTE_UNUSED)186 hook_int_const_tree_const_tree_1 (const_tree a ATTRIBUTE_UNUSED, const_tree b ATTRIBUTE_UNUSED)
187 {
188 return 1;
189 }
190
191 int
hook_int_rtx_0(rtx a ATTRIBUTE_UNUSED)192 hook_int_rtx_0 (rtx a ATTRIBUTE_UNUSED)
193 {
194 return 0;
195 }
196
197 int
hook_int_rtx_bool_0(rtx a ATTRIBUTE_UNUSED,bool b ATTRIBUTE_UNUSED)198 hook_int_rtx_bool_0 (rtx a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED)
199 {
200 return 0;
201 }
202
203 unsigned int
hook_uint_void_0(void)204 hook_uint_void_0 (void)
205 {
206 return 0;
207 }
208
209 void
hook_void_tree(tree a ATTRIBUTE_UNUSED)210 hook_void_tree (tree a ATTRIBUTE_UNUSED)
211 {
212 }
213
214 void
hook_void_constcharptr(const char * a ATTRIBUTE_UNUSED)215 hook_void_constcharptr (const char *a ATTRIBUTE_UNUSED)
216 {
217 }
218
219 void
hook_void_tree_treeptr(tree a ATTRIBUTE_UNUSED,tree * b ATTRIBUTE_UNUSED)220 hook_void_tree_treeptr (tree a ATTRIBUTE_UNUSED, tree *b ATTRIBUTE_UNUSED)
221 {
222 }
223
224 void
hook_void_int_int(int a ATTRIBUTE_UNUSED,int b ATTRIBUTE_UNUSED)225 hook_void_int_int (int a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED)
226 {
227 }
228
229 bool
hook_bool_tree_false(tree a ATTRIBUTE_UNUSED)230 hook_bool_tree_false (tree a ATTRIBUTE_UNUSED)
231 {
232 return false;
233 }
234
235 bool
hook_bool_const_tree_false(const_tree a ATTRIBUTE_UNUSED)236 hook_bool_const_tree_false (const_tree a ATTRIBUTE_UNUSED)
237 {
238 return false;
239 }
240
241 bool
hook_bool_tree_true(tree a ATTRIBUTE_UNUSED)242 hook_bool_tree_true (tree a ATTRIBUTE_UNUSED)
243 {
244 return true;
245 }
246
247 bool
hook_bool_const_tree_true(const_tree a ATTRIBUTE_UNUSED)248 hook_bool_const_tree_true (const_tree a ATTRIBUTE_UNUSED)
249 {
250 return true;
251 }
252
253 bool
hook_bool_tree_tree_false(tree a ATTRIBUTE_UNUSED,tree b ATTRIBUTE_UNUSED)254 hook_bool_tree_tree_false (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED)
255 {
256 return false;
257 }
258
259 bool
hook_bool_tree_tree_true(tree a ATTRIBUTE_UNUSED,tree b ATTRIBUTE_UNUSED)260 hook_bool_tree_tree_true (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED)
261 {
262 return true;
263 }
264
265 bool
hook_bool_tree_bool_false(tree a ATTRIBUTE_UNUSED,bool b ATTRIBUTE_UNUSED)266 hook_bool_tree_bool_false (tree a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED)
267 {
268 return false;
269 }
270
271 bool
hook_bool_rtx_false(rtx a ATTRIBUTE_UNUSED)272 hook_bool_rtx_false (rtx a ATTRIBUTE_UNUSED)
273 {
274 return false;
275 }
276
277 bool
hook_bool_uintp_uintp_false(unsigned int * a ATTRIBUTE_UNUSED,unsigned int * b ATTRIBUTE_UNUSED)278 hook_bool_uintp_uintp_false (unsigned int *a ATTRIBUTE_UNUSED,
279 unsigned int *b ATTRIBUTE_UNUSED)
280 {
281 return false;
282 }
283
284 bool
hook_bool_rtx_int_int_int_intp_bool_false(rtx a ATTRIBUTE_UNUSED,int b ATTRIBUTE_UNUSED,int c ATTRIBUTE_UNUSED,int d ATTRIBUTE_UNUSED,int * e ATTRIBUTE_UNUSED,bool speed_p ATTRIBUTE_UNUSED)285 hook_bool_rtx_int_int_int_intp_bool_false (rtx a ATTRIBUTE_UNUSED,
286 int b ATTRIBUTE_UNUSED,
287 int c ATTRIBUTE_UNUSED,
288 int d ATTRIBUTE_UNUSED,
289 int *e ATTRIBUTE_UNUSED,
290 bool speed_p ATTRIBUTE_UNUSED)
291 {
292 return false;
293 }
294
295 /* Generic hook that takes an rtx and returns it. */
296 rtx
hook_rtx_rtx_identity(rtx x)297 hook_rtx_rtx_identity (rtx x)
298 {
299 return x;
300 }
301
302 /* Generic hook that takes an rtx and returns NULL_RTX. */
303 rtx
hook_rtx_rtx_null(rtx x ATTRIBUTE_UNUSED)304 hook_rtx_rtx_null (rtx x ATTRIBUTE_UNUSED)
305 {
306 return NULL;
307 }
308
309 /* Generic hook that takes a tree and an int and returns NULL_RTX. */
310 rtx
hook_rtx_tree_int_null(tree a ATTRIBUTE_UNUSED,int b ATTRIBUTE_UNUSED)311 hook_rtx_tree_int_null (tree a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED)
312 {
313 return NULL;
314 }
315
316 /* Generic hook that takes three trees and returns the last one as is. */
317 tree
hook_tree_tree_tree_tree_3rd_identity(tree a ATTRIBUTE_UNUSED,tree b ATTRIBUTE_UNUSED,tree c)318 hook_tree_tree_tree_tree_3rd_identity (tree a ATTRIBUTE_UNUSED,
319 tree b ATTRIBUTE_UNUSED, tree c)
320 {
321 return c;
322 }
323
324 /* Generic hook that takes a tree and returns a NULL string. */
325 const char *
hook_constcharptr_const_tree_null(const_tree t ATTRIBUTE_UNUSED)326 hook_constcharptr_const_tree_null (const_tree t ATTRIBUTE_UNUSED)
327 {
328 return NULL;
329 }
330
331 tree
hook_tree_tree_int_treep_bool_null(tree t0 ATTRIBUTE_UNUSED,int i ATTRIBUTE_UNUSED,tree * p ATTRIBUTE_UNUSED,bool ignore ATTRIBUTE_UNUSED)332 hook_tree_tree_int_treep_bool_null (tree t0 ATTRIBUTE_UNUSED,
333 int i ATTRIBUTE_UNUSED,
334 tree *p ATTRIBUTE_UNUSED,
335 bool ignore ATTRIBUTE_UNUSED)
336 {
337 return NULL;
338 }
339
340 tree
hook_tree_tree_tree_null(tree t0 ATTRIBUTE_UNUSED,tree t1 ATTRIBUTE_UNUSED)341 hook_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, tree t1 ATTRIBUTE_UNUSED)
342 {
343 return NULL;
344 }
345
346 tree
hook_tree_tree_tree_tree_null(tree t0 ATTRIBUTE_UNUSED,tree t1 ATTRIBUTE_UNUSED,tree t2 ATTRIBUTE_UNUSED)347 hook_tree_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED,
348 tree t1 ATTRIBUTE_UNUSED,
349 tree t2 ATTRIBUTE_UNUSED)
350 {
351 return NULL;
352 }
353
354 /* Generic hook that takes a rtx and returns a NULL string. */
355 const char *
hook_constcharptr_const_rtx_null(const_rtx r ATTRIBUTE_UNUSED)356 hook_constcharptr_const_rtx_null (const_rtx r ATTRIBUTE_UNUSED)
357 {
358 return NULL;
359 }
360
361 const char *
hook_constcharptr_const_tree_const_tree_null(const_tree t0 ATTRIBUTE_UNUSED,const_tree t1 ATTRIBUTE_UNUSED)362 hook_constcharptr_const_tree_const_tree_null (const_tree t0 ATTRIBUTE_UNUSED,
363 const_tree t1 ATTRIBUTE_UNUSED)
364 {
365 return NULL;
366 }
367
368 const char *
hook_constcharptr_int_const_tree_null(int i ATTRIBUTE_UNUSED,const_tree t0 ATTRIBUTE_UNUSED)369 hook_constcharptr_int_const_tree_null (int i ATTRIBUTE_UNUSED,
370 const_tree t0 ATTRIBUTE_UNUSED)
371 {
372 return NULL;
373 }
374
375 const char *
hook_constcharptr_int_const_tree_const_tree_null(int i ATTRIBUTE_UNUSED,const_tree t0 ATTRIBUTE_UNUSED,const_tree t1 ATTRIBUTE_UNUSED)376 hook_constcharptr_int_const_tree_const_tree_null (int i ATTRIBUTE_UNUSED,
377 const_tree t0 ATTRIBUTE_UNUSED,
378 const_tree t1 ATTRIBUTE_UNUSED)
379 {
380 return NULL;
381 }
382
383 /* Generic hook that takes a const_tree and returns NULL_TREE. */
384 tree
hook_tree_const_tree_null(const_tree t ATTRIBUTE_UNUSED)385 hook_tree_const_tree_null (const_tree t ATTRIBUTE_UNUSED)
386 {
387 return NULL;
388 }
389
390 /* Generic hook that takes a rtx and an int and returns a bool. */
391
392 bool
hook_bool_rtx_int_false(rtx insn ATTRIBUTE_UNUSED,int mode ATTRIBUTE_UNUSED)393 hook_bool_rtx_int_false (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
394 {
395 return false;
396 }
397
398 /* Generic hook that takes a rtx and an int and returns void. */
399
400 void
hook_void_rtx_int(rtx insn ATTRIBUTE_UNUSED,int mode ATTRIBUTE_UNUSED)401 hook_void_rtx_int (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
402 {
403 }
404
405 /* Generic hook that takes a struct gcc_options * and returns void. */
406
407 void
hook_void_gcc_optionsp(struct gcc_options * opts ATTRIBUTE_UNUSED)408 hook_void_gcc_optionsp (struct gcc_options *opts ATTRIBUTE_UNUSED)
409 {
410 }
411