Daily bump.
[official-gcc.git] / gcc / hooks.c
blob3259658e4f4f9562bd93e2a66c24cf554a135169
1 /* General-purpose hooks.
2 Copyright (C) 2002-2013 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 (bool) and returns false. */
52 bool
53 hook_bool_bool_false (bool a ATTRIBUTE_UNUSED)
55 return false;
58 /* Generic hook that takes (bool, struct gcc_options *) and returns false. */
59 bool
60 hook_bool_bool_gcc_optionsp_false (bool a ATTRIBUTE_UNUSED,
61 struct gcc_options *opts ATTRIBUTE_UNUSED)
63 return false;
66 /* Generic hook that takes const int, const int) and returns true. */
67 bool hook_bool_const_int_const_int_true (const int a ATTRIBUTE_UNUSED,
68 const int b ATTRIBUTE_UNUSED)
70 return true;
73 /* Generic hook that takes (enum machine_mode) and returns false. */
74 bool
75 hook_bool_mode_false (enum machine_mode mode ATTRIBUTE_UNUSED)
77 return false;
80 /* Generic hook that takes (enum machine_mode) and returns true. */
81 bool
82 hook_bool_mode_true (enum machine_mode mode ATTRIBUTE_UNUSED)
84 return true;
87 /* Generic hook that takes (enum machine_mode, const_rtx) and returns false. */
88 bool
89 hook_bool_mode_const_rtx_false (enum machine_mode mode ATTRIBUTE_UNUSED,
90 const_rtx value ATTRIBUTE_UNUSED)
92 return false;
95 /* Generic hook that takes (enum machine_mode, const_rtx) and returns true. */
96 bool
97 hook_bool_mode_const_rtx_true (enum machine_mode mode ATTRIBUTE_UNUSED,
98 const_rtx value ATTRIBUTE_UNUSED)
100 return true;
103 /* Generic hook that takes (enum machine_mode, rtx) and returns false. */
104 bool
105 hook_bool_mode_rtx_false (enum machine_mode mode ATTRIBUTE_UNUSED,
106 rtx value ATTRIBUTE_UNUSED)
108 return false;
111 /* Generic hook that takes (enum machine_mode, rtx) and returns true. */
112 bool
113 hook_bool_mode_rtx_true (enum machine_mode mode ATTRIBUTE_UNUSED,
114 rtx value ATTRIBUTE_UNUSED)
116 return true;
119 /* Generic hook that takes (rtx, rtx) and returns true. */
120 bool
121 hook_bool_const_rtx_const_rtx_true (const_rtx follower ATTRIBUTE_UNUSED,
122 const_rtx followee ATTRIBUTE_UNUSED)
124 return true;
127 /* Generic hook that takes (enum machine_mode, unsigned HOST_WIDE_INT)
128 and returns false. */
129 bool
130 hook_bool_mode_uhwi_false (enum machine_mode mode ATTRIBUTE_UNUSED,
131 unsigned HOST_WIDE_INT value ATTRIBUTE_UNUSED)
133 return false;
136 /* Generic hook that takes (FILE *, const char *) and does nothing. */
137 void
138 hook_void_FILEptr_constcharptr (FILE *a ATTRIBUTE_UNUSED, const char *b ATTRIBUTE_UNUSED)
142 /* Generic hook that takes (FILE *, rtx) and returns false. */
143 bool
144 hook_bool_FILEptr_rtx_false (FILE *a ATTRIBUTE_UNUSED,
145 rtx b ATTRIBUTE_UNUSED)
147 return false;
150 /* Generic hook that takes (gimple_stmt_iterator *) and returns
151 false. */
152 bool
153 hook_bool_gsiptr_false (gimple_stmt_iterator *a ATTRIBUTE_UNUSED)
155 return false;
158 /* Used for the TARGET_ASM_CAN_OUTPUT_MI_THUNK hook. */
159 bool
160 hook_bool_const_tree_hwi_hwi_const_tree_false (const_tree a ATTRIBUTE_UNUSED,
161 HOST_WIDE_INT b ATTRIBUTE_UNUSED,
162 HOST_WIDE_INT c ATTRIBUTE_UNUSED,
163 const_tree d ATTRIBUTE_UNUSED)
165 return false;
168 bool
169 hook_bool_const_tree_hwi_hwi_const_tree_true (const_tree a ATTRIBUTE_UNUSED,
170 HOST_WIDE_INT b ATTRIBUTE_UNUSED,
171 HOST_WIDE_INT c ATTRIBUTE_UNUSED,
172 const_tree d ATTRIBUTE_UNUSED)
174 return true;
177 bool
178 default_can_output_mi_thunk_no_vcall (const_tree a ATTRIBUTE_UNUSED,
179 HOST_WIDE_INT b ATTRIBUTE_UNUSED,
180 HOST_WIDE_INT c,
181 const_tree d ATTRIBUTE_UNUSED)
183 return c == 0;
187 hook_int_uint_mode_1 (unsigned int a ATTRIBUTE_UNUSED,
188 enum machine_mode b ATTRIBUTE_UNUSED)
190 return 1;
194 hook_int_const_tree_0 (const_tree a ATTRIBUTE_UNUSED)
196 return 0;
199 /* ??? Used for comp_type_attributes, which ought to return bool. */
201 hook_int_const_tree_const_tree_1 (const_tree a ATTRIBUTE_UNUSED, const_tree b ATTRIBUTE_UNUSED)
203 return 1;
207 hook_int_rtx_0 (rtx a ATTRIBUTE_UNUSED)
209 return 0;
213 hook_int_rtx_1 (rtx)
215 return 1;
219 hook_int_rtx_unreachable (rtx)
221 gcc_unreachable ();
225 hook_int_rtx_bool_0 (rtx a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED)
227 return 0;
231 hook_int_rtx_mode_as_bool_0 (rtx, enum machine_mode, addr_space_t, bool)
233 return 0;
236 unsigned int
237 hook_uint_void_0 (void)
239 return 0;
242 void
243 hook_void_tree (tree a ATTRIBUTE_UNUSED)
247 void
248 hook_void_constcharptr (const char *a ATTRIBUTE_UNUSED)
252 void
253 hook_void_tree_treeptr (tree a ATTRIBUTE_UNUSED, tree *b ATTRIBUTE_UNUSED)
257 void
258 hook_void_int_int (int a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED)
262 bool
263 hook_bool_tree_false (tree a ATTRIBUTE_UNUSED)
265 return false;
268 bool
269 hook_bool_const_tree_false (const_tree a ATTRIBUTE_UNUSED)
271 return false;
274 bool
275 hook_bool_tree_true (tree a ATTRIBUTE_UNUSED)
277 return true;
280 bool
281 hook_bool_const_tree_true (const_tree a ATTRIBUTE_UNUSED)
283 return true;
286 bool
287 hook_bool_tree_tree_false (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED)
289 return false;
292 bool
293 hook_bool_tree_tree_true (tree a ATTRIBUTE_UNUSED, tree b ATTRIBUTE_UNUSED)
295 return true;
298 bool
299 hook_bool_tree_bool_false (tree a ATTRIBUTE_UNUSED, bool b ATTRIBUTE_UNUSED)
301 return false;
304 bool
305 hook_bool_rtx_true (rtx a ATTRIBUTE_UNUSED)
307 return true;
310 bool
311 hook_bool_rtx_false (rtx a ATTRIBUTE_UNUSED)
313 return false;
316 bool
317 hook_bool_uintp_uintp_false (unsigned int *a ATTRIBUTE_UNUSED,
318 unsigned int *b ATTRIBUTE_UNUSED)
320 return false;
323 bool
324 hook_bool_rtx_int_int_int_intp_bool_false (rtx a ATTRIBUTE_UNUSED,
325 int b ATTRIBUTE_UNUSED,
326 int c ATTRIBUTE_UNUSED,
327 int d ATTRIBUTE_UNUSED,
328 int *e ATTRIBUTE_UNUSED,
329 bool speed_p ATTRIBUTE_UNUSED)
331 return false;
334 /* Generic hook that takes an rtx and returns it. */
336 hook_rtx_rtx_identity (rtx x)
338 return x;
341 /* Generic hook that takes an rtx and returns NULL_RTX. */
343 hook_rtx_rtx_null (rtx x ATTRIBUTE_UNUSED)
345 return NULL;
348 /* Generic hook that takes a tree and an int and returns NULL_RTX. */
350 hook_rtx_tree_int_null (tree a ATTRIBUTE_UNUSED, int b ATTRIBUTE_UNUSED)
352 return NULL;
355 /* Generic hook that takes three trees and returns the last one as is. */
356 tree
357 hook_tree_tree_tree_tree_3rd_identity (tree a ATTRIBUTE_UNUSED,
358 tree b ATTRIBUTE_UNUSED, tree c)
360 return c;
363 /* Generic hook that takes no arguments and returns a NULL string. */
364 const char *
365 hook_constcharptr_void_null (void)
367 return NULL;
370 /* Generic hook that takes a tree and returns a NULL string. */
371 const char *
372 hook_constcharptr_const_tree_null (const_tree t ATTRIBUTE_UNUSED)
374 return NULL;
377 tree
378 hook_tree_tree_int_treep_bool_null (tree t0 ATTRIBUTE_UNUSED,
379 int i ATTRIBUTE_UNUSED,
380 tree *p ATTRIBUTE_UNUSED,
381 bool ignore ATTRIBUTE_UNUSED)
383 return NULL;
386 tree
387 hook_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED, tree t1 ATTRIBUTE_UNUSED)
389 return NULL;
392 tree
393 hook_tree_tree_tree_tree_null (tree t0 ATTRIBUTE_UNUSED,
394 tree t1 ATTRIBUTE_UNUSED,
395 tree t2 ATTRIBUTE_UNUSED)
397 return NULL;
400 /* Generic hook that takes a rtx and returns a NULL string. */
401 const char *
402 hook_constcharptr_const_rtx_null (const_rtx r ATTRIBUTE_UNUSED)
404 return NULL;
407 const char *
408 hook_constcharptr_const_tree_const_tree_null (const_tree t0 ATTRIBUTE_UNUSED,
409 const_tree t1 ATTRIBUTE_UNUSED)
411 return NULL;
414 const char *
415 hook_constcharptr_int_const_tree_null (int i ATTRIBUTE_UNUSED,
416 const_tree t0 ATTRIBUTE_UNUSED)
418 return NULL;
421 const char *
422 hook_constcharptr_int_const_tree_const_tree_null (int i ATTRIBUTE_UNUSED,
423 const_tree t0 ATTRIBUTE_UNUSED,
424 const_tree t1 ATTRIBUTE_UNUSED)
426 return NULL;
429 /* Generic hook that takes a const_tree and returns NULL_TREE. */
430 tree
431 hook_tree_const_tree_null (const_tree t ATTRIBUTE_UNUSED)
433 return NULL;
436 /* Generic hook that takes a rtx and an int and returns a bool. */
438 bool
439 hook_bool_rtx_int_false (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
441 return false;
444 /* Generic hook that takes a rtx and an int and returns void. */
446 void
447 hook_void_rtx_int (rtx insn ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
451 /* Generic hook that takes a struct gcc_options * and returns void. */
453 void
454 hook_void_gcc_optionsp (struct gcc_options *opts ATTRIBUTE_UNUSED)