1 /* General-purpose hooks.
2 Copyright (C) 2002-2013 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
hook_void_void(void)33 hook_void_void (void)
34 {
35 }
36
37 /* Generic hook that takes no arguments and returns false. */
38 bool
hook_bool_void_false(void)39 hook_bool_void_false (void)
40 {
41 return false;
42 }
43
44 /* Generic hook that takes no arguments and returns true. */
45 bool
hook_bool_void_true(void)46 hook_bool_void_true (void)
47 {
48 return true;
49 }
50
51 /* Generic hook that takes (bool) and returns false. */
52 bool
hook_bool_bool_false(bool a ATTRIBUTE_UNUSED)53 hook_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. */
59 bool
hook_bool_bool_gcc_optionsp_false(bool a ATTRIBUTE_UNUSED,struct gcc_options * opts ATTRIBUTE_UNUSED)60 hook_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. */
hook_bool_const_int_const_int_true(const int a ATTRIBUTE_UNUSED,const int b ATTRIBUTE_UNUSED)67 bool 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 (enum machine_mode) and returns false. */
74 bool
hook_bool_mode_false(enum machine_mode mode ATTRIBUTE_UNUSED)75 hook_bool_mode_false (enum machine_mode mode ATTRIBUTE_UNUSED)
76 {
77 return false;
78 }
79
80 /* Generic hook that takes (enum machine_mode) and returns true. */
81 bool
hook_bool_mode_true(enum machine_mode mode ATTRIBUTE_UNUSED)82 hook_bool_mode_true (enum machine_mode mode ATTRIBUTE_UNUSED)
83 {
84 return true;
85 }
86
87 /* Generic hook that takes (enum machine_mode, const_rtx) and returns false. */
88 bool
hook_bool_mode_const_rtx_false(enum machine_mode mode ATTRIBUTE_UNUSED,const_rtx value ATTRIBUTE_UNUSED)89 hook_bool_mode_const_rtx_false (enum machine_mode mode ATTRIBUTE_UNUSED,
90 const_rtx value ATTRIBUTE_UNUSED)
91 {
92 return false;
93 }
94
95 /* Generic hook that takes (enum machine_mode, const_rtx) and returns true. */
96 bool
hook_bool_mode_const_rtx_true(enum machine_mode mode ATTRIBUTE_UNUSED,const_rtx value ATTRIBUTE_UNUSED)97 hook_bool_mode_const_rtx_true (enum machine_mode mode ATTRIBUTE_UNUSED,
98 const_rtx value ATTRIBUTE_UNUSED)
99 {
100 return true;
101 }
102
103 /* Generic hook that takes (enum machine_mode, rtx) and returns false. */
104 bool
hook_bool_mode_rtx_false(enum machine_mode mode ATTRIBUTE_UNUSED,rtx value ATTRIBUTE_UNUSED)105 hook_bool_mode_rtx_false (enum machine_mode mode ATTRIBUTE_UNUSED,
106 rtx value ATTRIBUTE_UNUSED)
107 {
108 return false;
109 }
110
111 /* Generic hook that takes (enum machine_mode, rtx) and returns true. */
112 bool
hook_bool_mode_rtx_true(enum machine_mode mode ATTRIBUTE_UNUSED,rtx value ATTRIBUTE_UNUSED)113 hook_bool_mode_rtx_true (enum machine_mode mode ATTRIBUTE_UNUSED,
114 rtx value ATTRIBUTE_UNUSED)
115 {
116 return true;
117 }
118
119 /* Generic hook that takes (rtx, rtx) and returns true. */
120 bool
hook_bool_const_rtx_const_rtx_true(const_rtx follower ATTRIBUTE_UNUSED,const_rtx followee ATTRIBUTE_UNUSED)121 hook_bool_const_rtx_const_rtx_true (const_rtx follower ATTRIBUTE_UNUSED,
122 const_rtx followee ATTRIBUTE_UNUSED)
123 {
124 return true;
125 }
126
127 /* Generic hook that takes (enum machine_mode, unsigned HOST_WIDE_INT)
128 and returns false. */
129 bool
hook_bool_mode_uhwi_false(enum machine_mode mode ATTRIBUTE_UNUSED,unsigned HOST_WIDE_INT value ATTRIBUTE_UNUSED)130 hook_bool_mode_uhwi_false (enum 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. */
137 void
hook_void_FILEptr_constcharptr(FILE * a ATTRIBUTE_UNUSED,const char * b ATTRIBUTE_UNUSED)138 hook_void_FILEptr_constcharptr (FILE *a ATTRIBUTE_UNUSED, const char *b ATTRIBUTE_UNUSED)
139 {
140 }
141
142 /* Generic hook that takes (FILE *, rtx) and returns false. */
143 bool
hook_bool_FILEptr_rtx_false(FILE * a ATTRIBUTE_UNUSED,rtx b ATTRIBUTE_UNUSED)144 hook_bool_FILEptr_rtx_false (FILE *a ATTRIBUTE_UNUSED,
145 rtx b ATTRIBUTE_UNUSED)
146 {
147 return false;
148 }
149
150 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook. */
151 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)152 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree a ATTRIBUTE_UNUSED,
153 HOST_WIDE_INT b ATTRIBUTE_UNUSED,
154 HOST_WIDE_INT c ATTRIBUTE_UNUSED,
155 const_tree d ATTRIBUTE_UNUSED)
156 {
157 return false;
158 }
159
160 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)161 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree a ATTRIBUTE_UNUSED,
162 HOST_WIDE_INT b ATTRIBUTE_UNUSED,
163 HOST_WIDE_INT c ATTRIBUTE_UNUSED,
164 const_tree d ATTRIBUTE_UNUSED)
165 {
166 return true;
167 }
168
169 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)170 default_can_output_mi_thunk_no_vcall (const_tree a ATTRIBUTE_UNUSED,
171 HOST_WIDE_INT b ATTRIBUTE_UNUSED,
172 HOST_WIDE_INT c,
173 const_tree d ATTRIBUTE_UNUSED)
174 {
175 return c == 0;
176 }
177
178 int
hook_int_uint_mode_1(unsigned int a ATTRIBUTE_UNUSED,enum machine_mode b ATTRIBUTE_UNUSED)179 hook_int_uint_mode_1 (unsigned int a ATTRIBUTE_UNUSED,
180 enum machine_mode b ATTRIBUTE_UNUSED)
181 {
182 return 1;
183 }
184
185 int
hook_int_const_tree_0(const_tree a ATTRIBUTE_UNUSED)186 hook_int_const_tree_0 (const_tree a ATTRIBUTE_UNUSED)
187 {
188 return 0;
189 }
190
191 /* ??? Used for comp_type_attributes, which ought to return bool. */
192 int
hook_int_const_tree_const_tree_1(const_tree a ATTRIBUTE_UNUSED,const_tree b ATTRIBUTE_UNUSED)193 hook_int_const_tree_const_tree_1 (const_tree a ATTRIBUTE_UNUSED, const_tree b ATTRIBUTE_UNUSED)
194 {
195 return 1;
196 }
197
198 int
hook_int_rtx_0(rtx a ATTRIBUTE_UNUSED)199 hook_int_rtx_0 (rtx a ATTRIBUTE_UNUSED)
200 {
201 return 0;
202 }
203
204 int
hook_int_rtx_1(rtx)205 hook_int_rtx_1 (rtx)
206 {
207 return 1;
208 }
209
210 int
hook_int_rtx_unreachable(rtx)211 hook_int_rtx_unreachable (rtx)
212 {
213 gcc_unreachable ();
214 }
215
216 int
hook_int_rtx_bool_0(rtx a ATTRIBUTE_UNUSED,bool b ATTRIBUTE_UNUSED)217 hook_int_rtx_bool_0 (rtx a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED)
218 {
219 return 0;
220 }
221
222 int
hook_int_rtx_mode_as_bool_0(rtx,enum machine_mode,addr_space_t,bool)223 hook_int_rtx_mode_as_bool_0 (rtx, enum machine_mode, addr_space_t, bool)
224 {
225 return 0;
226 }
227
228 unsigned int
hook_uint_void_0(void)229 hook_uint_void_0 (void)
230 {
231 return 0;
232 }
233
234 void
hook_void_tree(tree a ATTRIBUTE_UNUSED)235 hook_void_tree (tree a ATTRIBUTE_UNUSED)
236 {
237 }
238
239 void
hook_void_constcharptr(const char * a ATTRIBUTE_UNUSED)240 hook_void_constcharptr (const char *a ATTRIBUTE_UNUSED)
241 {
242 }
243
244 void
hook_void_tree_treeptr(tree a ATTRIBUTE_UNUSED,tree * b ATTRIBUTE_UNUSED)245 hook_void_tree_treeptr (tree a ATTRIBUTE_UNUSED, tree *b ATTRIBUTE_UNUSED)
246 {
247 }
248
249 void
hook_void_int_int(int a ATTRIBUTE_UNUSED,int b ATTRIBUTE_UNUSED)250 hook_void_int_int (int a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED)
251 {
252 }
253
254 bool
hook_bool_tree_false(tree a ATTRIBUTE_UNUSED)255 hook_bool_tree_false (tree a ATTRIBUTE_UNUSED)
256 {
257 return false;
258 }
259
260 bool
hook_bool_const_tree_false(const_tree a ATTRIBUTE_UNUSED)261 hook_bool_const_tree_false (const_tree a ATTRIBUTE_UNUSED)
262 {
263 return false;
264 }
265
266 bool
hook_bool_tree_true(tree a ATTRIBUTE_UNUSED)267 hook_bool_tree_true (tree a ATTRIBUTE_UNUSED)
268 {
269 return true;
270 }
271
272 bool
hook_bool_const_tree_true(const_tree a ATTRIBUTE_UNUSED)273 hook_bool_const_tree_true (const_tree a ATTRIBUTE_UNUSED)
274 {
275 return true;
276 }
277
278 bool
hook_bool_tree_tree_false(tree a ATTRIBUTE_UNUSED,tree b ATTRIBUTE_UNUSED)279 hook_bool_tree_tree_false (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED)
280 {
281 return false;
282 }
283
284 bool
hook_bool_tree_tree_true(tree a ATTRIBUTE_UNUSED,tree b ATTRIBUTE_UNUSED)285 hook_bool_tree_tree_true (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED)
286 {
287 return true;
288 }
289
290 bool
hook_bool_tree_bool_false(tree a ATTRIBUTE_UNUSED,bool b ATTRIBUTE_UNUSED)291 hook_bool_tree_bool_false (tree a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED)
292 {
293 return false;
294 }
295
296 bool
hook_bool_rtx_true(rtx a ATTRIBUTE_UNUSED)297 hook_bool_rtx_true (rtx a ATTRIBUTE_UNUSED)
298 {
299 return true;
300 }
301
302 bool
hook_bool_rtx_false(rtx a ATTRIBUTE_UNUSED)303 hook_bool_rtx_false (rtx a ATTRIBUTE_UNUSED)
304 {
305 return false;
306 }
307
308 bool
hook_bool_uintp_uintp_false(unsigned int * a ATTRIBUTE_UNUSED,unsigned int * b ATTRIBUTE_UNUSED)309 hook_bool_uintp_uintp_false (unsigned int *a ATTRIBUTE_UNUSED,
310 unsigned int *b ATTRIBUTE_UNUSED)
311 {
312 return false;
313 }
314
315 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)316 hook_bool_rtx_int_int_int_intp_bool_false (rtx a ATTRIBUTE_UNUSED,
317 int b ATTRIBUTE_UNUSED,
318 int c ATTRIBUTE_UNUSED,
319 int d ATTRIBUTE_UNUSED,
320 int *e ATTRIBUTE_UNUSED,
321 bool speed_p ATTRIBUTE_UNUSED)
322 {
323 return false;
324 }
325
326 /* Generic hook that takes an rtx and returns it. */
327 rtx
hook_rtx_rtx_identity(rtx x)328 hook_rtx_rtx_identity (rtx x)
329 {
330 return x;
331 }
332
333 /* Generic hook that takes an rtx and returns NULL_RTX. */
334 rtx
hook_rtx_rtx_null(rtx x ATTRIBUTE_UNUSED)335 hook_rtx_rtx_null (rtx x ATTRIBUTE_UNUSED)
336 {
337 return NULL;
338 }
339
340 /* Generic hook that takes a tree and an int and returns NULL_RTX. */
341 rtx
hook_rtx_tree_int_null(tree a ATTRIBUTE_UNUSED,int b ATTRIBUTE_UNUSED)342 hook_rtx_tree_int_null (tree a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED)
343 {
344 return NULL;
345 }
346
347 /* Generic hook that takes three trees and returns the last one as is. */
348 tree
hook_tree_tree_tree_tree_3rd_identity(tree a ATTRIBUTE_UNUSED,tree b ATTRIBUTE_UNUSED,tree c)349 hook_tree_tree_tree_tree_3rd_identity (tree a ATTRIBUTE_UNUSED,
350 tree b ATTRIBUTE_UNUSED, tree c)
351 {
352 return c;
353 }
354
355 /* Generic hook that takes no arguments and returns a NULL string. */
356 const char *
hook_constcharptr_void_null(void)357 hook_constcharptr_void_null (void)
358 {
359 return NULL;
360 }
361
362 /* Generic hook that takes a tree and returns a NULL string. */
363 const char *
hook_constcharptr_const_tree_null(const_tree t ATTRIBUTE_UNUSED)364 hook_constcharptr_const_tree_null (const_tree t ATTRIBUTE_UNUSED)
365 {
366 return NULL;
367 }
368
369 tree
hook_tree_tree_int_treep_bool_null(tree t0 ATTRIBUTE_UNUSED,int i ATTRIBUTE_UNUSED,tree * p ATTRIBUTE_UNUSED,bool ignore ATTRIBUTE_UNUSED)370 hook_tree_tree_int_treep_bool_null (tree t0 ATTRIBUTE_UNUSED,
371 int i ATTRIBUTE_UNUSED,
372 tree *p ATTRIBUTE_UNUSED,
373 bool ignore ATTRIBUTE_UNUSED)
374 {
375 return NULL;
376 }
377
378 tree
hook_tree_tree_tree_null(tree t0 ATTRIBUTE_UNUSED,tree t1 ATTRIBUTE_UNUSED)379 hook_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, tree t1 ATTRIBUTE_UNUSED)
380 {
381 return NULL;
382 }
383
384 tree
hook_tree_tree_tree_tree_null(tree t0 ATTRIBUTE_UNUSED,tree t1 ATTRIBUTE_UNUSED,tree t2 ATTRIBUTE_UNUSED)385 hook_tree_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED,
386 tree t1 ATTRIBUTE_UNUSED,
387 tree t2 ATTRIBUTE_UNUSED)
388 {
389 return NULL;
390 }
391
392 /* Generic hook that takes a rtx and returns a NULL string. */
393 const char *
hook_constcharptr_const_rtx_null(const_rtx r ATTRIBUTE_UNUSED)394 hook_constcharptr_const_rtx_null (const_rtx r ATTRIBUTE_UNUSED)
395 {
396 return NULL;
397 }
398
399 const char *
hook_constcharptr_const_tree_const_tree_null(const_tree t0 ATTRIBUTE_UNUSED,const_tree t1 ATTRIBUTE_UNUSED)400 hook_constcharptr_const_tree_const_tree_null (const_tree t0 ATTRIBUTE_UNUSED,
401 const_tree t1 ATTRIBUTE_UNUSED)
402 {
403 return NULL;
404 }
405
406 const char *
hook_constcharptr_int_const_tree_null(int i ATTRIBUTE_UNUSED,const_tree t0 ATTRIBUTE_UNUSED)407 hook_constcharptr_int_const_tree_null (int i ATTRIBUTE_UNUSED,
408 const_tree t0 ATTRIBUTE_UNUSED)
409 {
410 return NULL;
411 }
412
413 const char *
hook_constcharptr_int_const_tree_const_tree_null(int i ATTRIBUTE_UNUSED,const_tree t0 ATTRIBUTE_UNUSED,const_tree t1 ATTRIBUTE_UNUSED)414 hook_constcharptr_int_const_tree_const_tree_null (int i ATTRIBUTE_UNUSED,
415 const_tree t0 ATTRIBUTE_UNUSED,
416 const_tree t1 ATTRIBUTE_UNUSED)
417 {
418 return NULL;
419 }
420
421 /* Generic hook that takes a const_tree and returns NULL_TREE. */
422 tree
hook_tree_const_tree_null(const_tree t ATTRIBUTE_UNUSED)423 hook_tree_const_tree_null (const_tree t ATTRIBUTE_UNUSED)
424 {
425 return NULL;
426 }
427
428 /* Generic hook that takes a rtx and an int and returns a bool. */
429
430 bool
hook_bool_rtx_int_false(rtx insn ATTRIBUTE_UNUSED,int mode ATTRIBUTE_UNUSED)431 hook_bool_rtx_int_false (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
432 {
433 return false;
434 }
435
436 /* Generic hook that takes a rtx and an int and returns void. */
437
438 void
hook_void_rtx_int(rtx insn ATTRIBUTE_UNUSED,int mode ATTRIBUTE_UNUSED)439 hook_void_rtx_int (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
440 {
441 }
442
443 /* Generic hook that takes a struct gcc_options * and returns void. */
444
445 void
hook_void_gcc_optionsp(struct gcc_options * opts ATTRIBUTE_UNUSED)446 hook_void_gcc_optionsp (struct gcc_options *opts ATTRIBUTE_UNUSED)
447 {
448 }
449