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69dcadff | 1 | /* Default language-specific hooks. |
43577e6b | 2 | Copyright 2001, 2002 Free Software Foundation, Inc. |
69dcadff AO |
3 | Contributed by Alexandre Oliva <aoliva@redhat.com> |
4 | ||
5 | This file is part of GNU CC. | |
6 | ||
7 | GNU CC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU CC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU CC; see the file COPYING. If not, write to | |
19 | the Free Software Foundation, 59 Temple Place - Suite 330, | |
20 | Boston, MA 02111-1307, USA. */ | |
21 | ||
22 | #include "config.h" | |
23 | #include "system.h" | |
24 | #include "toplev.h" | |
25 | #include "tree.h" | |
89d684bb | 26 | #include "c-tree.h" |
69dcadff | 27 | #include "tree-inline.h" |
1affb409 JJ |
28 | #include "rtl.h" |
29 | #include "insn-config.h" | |
30 | #include "integrate.h" | |
29ac78d5 | 31 | #include "flags.h" |
59bee412 | 32 | #include "langhooks.h" |
d23c55c2 | 33 | #include "langhooks-def.h" |
59bee412 | 34 | |
77b1a921 | 35 | /* Do nothing; in many cases the default hook. */ |
8ac61af7 | 36 | |
77b1a921 | 37 | void |
d23c55c2 | 38 | lhd_do_nothing () |
77b1a921 NB |
39 | { |
40 | } | |
41 | ||
63e1b1c4 NB |
42 | /* Do nothing. */ |
43 | ||
44 | void | |
45 | lhd_do_nothing_t (t) | |
46 | tree t ATTRIBUTE_UNUSED; | |
47 | { | |
48 | } | |
49 | ||
ac79cd5a RK |
50 | /* Do nothing (return the tree node passed). */ |
51 | ||
52 | tree | |
53 | lhd_return_tree (t) | |
54 | tree t; | |
55 | { | |
56 | return t; | |
57 | } | |
58 | ||
c88770e9 NB |
59 | /* Do nothing (return NULL_TREE). */ |
60 | ||
61 | tree | |
62 | lhd_return_null_tree (t) | |
63 | tree t ATTRIBUTE_UNUSED; | |
64 | { | |
65 | return NULL_TREE; | |
66 | } | |
67 | ||
77b1a921 | 68 | /* Do nothing; the default hook to decode an option. */ |
8ac61af7 | 69 | |
77b1a921 | 70 | int |
d23c55c2 | 71 | lhd_decode_option (argc, argv) |
77b1a921 NB |
72 | int argc ATTRIBUTE_UNUSED; |
73 | char **argv ATTRIBUTE_UNUSED; | |
74 | { | |
75 | return 0; | |
76 | } | |
69dcadff | 77 | |
5d69f816 NB |
78 | /* Called from by print-tree.c. */ |
79 | ||
80 | void | |
81 | lhd_print_tree_nothing (file, node, indent) | |
82 | FILE *file ATTRIBUTE_UNUSED; | |
83 | tree node ATTRIBUTE_UNUSED; | |
84 | int indent ATTRIBUTE_UNUSED; | |
85 | { | |
ac79cd5a RK |
86 | } |
87 | ||
88 | /* Called from safe_from_p. */ | |
89 | ||
90 | int | |
91 | lhd_safe_from_p (x, exp) | |
f80230c1 RK |
92 | rtx x ATTRIBUTE_UNUSED; |
93 | tree exp ATTRIBUTE_UNUSED; | |
ac79cd5a RK |
94 | { |
95 | return 1; | |
d062a680 JM |
96 | } |
97 | ||
48a7a235 NB |
98 | /* Called from unsafe_for_reeval. */ |
99 | ||
100 | int | |
101 | lhd_unsafe_for_reeval (t) | |
102 | tree t ATTRIBUTE_UNUSED; | |
103 | { | |
104 | return -1; | |
105 | } | |
106 | ||
d062a680 JM |
107 | /* Called from staticp. */ |
108 | ||
109 | int | |
110 | lhd_staticp (exp) | |
990290e8 | 111 | tree exp ATTRIBUTE_UNUSED; |
d062a680 JM |
112 | { |
113 | return 0; | |
5d69f816 NB |
114 | } |
115 | ||
ef4f94ac RH |
116 | /* Called from check_global_declarations. */ |
117 | ||
118 | bool | |
119 | lhd_warn_unused_global_decl (decl) | |
120 | tree decl; | |
121 | { | |
122 | /* This is what used to exist in check_global_declarations. Probably | |
123 | not many of these actually apply to non-C languages. */ | |
124 | ||
125 | if (TREE_CODE (decl) == FUNCTION_DECL && DECL_INLINE (decl)) | |
126 | return false; | |
127 | if (TREE_CODE (decl) == VAR_DECL && TREE_READONLY (decl)) | |
128 | return false; | |
129 | if (DECL_IN_SYSTEM_HEADER (decl)) | |
130 | return false; | |
131 | ||
132 | return true; | |
133 | } | |
134 | ||
5d69f816 NB |
135 | /* Called when -dy is given on the command line. */ |
136 | ||
137 | void | |
138 | lhd_set_yydebug (value) | |
139 | int value; | |
140 | { | |
141 | if (value) | |
142 | fprintf (stderr, "warning: no yacc/bison-generated output to debug!\n"); | |
143 | } | |
144 | ||
599bba86 NB |
145 | /* Set the DECL_ASSEMBLER_NAME for DECL. */ |
146 | void | |
147 | lhd_set_decl_assembler_name (decl) | |
148 | tree decl; | |
149 | { | |
150 | /* The language-independent code should never use the | |
151 | DECL_ASSEMBLER_NAME for lots of DECLs. Only FUNCTION_DECLs and | |
152 | VAR_DECLs for variables with static storage duration need a real | |
153 | DECL_ASSEMBLER_NAME. */ | |
154 | if (TREE_CODE (decl) == FUNCTION_DECL | |
155 | || (TREE_CODE (decl) == VAR_DECL | |
156 | && (TREE_STATIC (decl) | |
157 | || DECL_EXTERNAL (decl) | |
158 | || TREE_PUBLIC (decl)))) | |
159 | /* By default, assume the name to use in assembly code is the | |
160 | same as that used in the source language. (That's correct | |
161 | for C, and GCC used to set DECL_ASSEMBLER_NAME to the same | |
162 | value as DECL_NAME in build_decl, so this choice provides | |
163 | backwards compatibility with existing front-ends. */ | |
164 | SET_DECL_ASSEMBLER_NAME (decl, DECL_NAME (decl)); | |
165 | else | |
166 | /* Nobody should ever be asking for the DECL_ASSEMBLER_NAME of | |
167 | these DECLs -- unless they're in language-dependent code, in | |
168 | which case set_decl_assembler_name hook should handle things. */ | |
169 | abort (); | |
170 | } | |
171 | ||
37207ee7 ZW |
172 | /* Provide a default routine to clear the binding stack. This is used |
173 | by languages that don't need to do anything special. */ | |
174 | void | |
d23c55c2 | 175 | lhd_clear_binding_stack () |
37207ee7 | 176 | { |
43577e6b | 177 | while (! (*lang_hooks.decls.global_bindings_p) ()) |
37207ee7 ZW |
178 | poplevel (0, 0, 0); |
179 | } | |
180 | ||
181 | /* Provide a default routine for alias sets that always returns -1. This | |
182 | is used by languages that don't need to do anything special. */ | |
183 | ||
184 | HOST_WIDE_INT | |
d23c55c2 | 185 | lhd_get_alias_set (t) |
37207ee7 ZW |
186 | tree t ATTRIBUTE_UNUSED; |
187 | { | |
188 | return -1; | |
189 | } | |
190 | ||
8ac61af7 RK |
191 | /* Provide a hook routine for alias sets that always returns 0. This is |
192 | used by languages that haven't deal with alias sets yet. */ | |
193 | ||
194 | HOST_WIDE_INT | |
195 | hook_get_alias_set_0 (t) | |
196 | tree t ATTRIBUTE_UNUSED; | |
197 | { | |
198 | return 0; | |
199 | } | |
200 | ||
c9d892a8 NB |
201 | /* This is the default expand_expr function. */ |
202 | ||
203 | rtx | |
204 | lhd_expand_expr (t, r, mm, em) | |
205 | tree t ATTRIBUTE_UNUSED; | |
206 | rtx r ATTRIBUTE_UNUSED; | |
207 | enum machine_mode mm ATTRIBUTE_UNUSED; | |
208 | int em ATTRIBUTE_UNUSED; | |
209 | { | |
210 | abort (); | |
211 | } | |
212 | ||
7afff7cf NB |
213 | /* This is the default decl_printable_name function. */ |
214 | ||
215 | const char * | |
216 | lhd_decl_printable_name (decl, verbosity) | |
217 | tree decl; | |
218 | int verbosity ATTRIBUTE_UNUSED; | |
219 | { | |
220 | return IDENTIFIER_POINTER (DECL_NAME (decl)); | |
221 | } | |
222 | ||
69dcadff AO |
223 | /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree() |
224 | after handling common cases, but before walking code-specific | |
225 | sub-trees. If this hook is overridden for a language, it should | |
226 | handle language-specific tree codes, as well as language-specific | |
227 | information associated to common tree codes. If a tree node is | |
228 | completely handled within this function, it should set *SUBTREES to | |
229 | 0, so that generic handling isn't attempted. For language-specific | |
230 | tree codes, generic handling would abort(), so make sure it is set | |
231 | properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero | |
232 | when the function is called. */ | |
233 | ||
234 | tree | |
d23c55c2 | 235 | lhd_tree_inlining_walk_subtrees (tp,subtrees,func,data,htab) |
69dcadff AO |
236 | tree *tp ATTRIBUTE_UNUSED; |
237 | int *subtrees ATTRIBUTE_UNUSED; | |
238 | walk_tree_fn func ATTRIBUTE_UNUSED; | |
239 | void *data ATTRIBUTE_UNUSED; | |
240 | void *htab ATTRIBUTE_UNUSED; | |
241 | { | |
242 | return NULL_TREE; | |
243 | } | |
244 | ||
245 | /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to | |
246 | determine whether there are language-specific reasons for not | |
247 | inlining a given function. */ | |
248 | ||
249 | int | |
d23c55c2 | 250 | lhd_tree_inlining_cannot_inline_tree_fn (fnp) |
6aa77e6c | 251 | tree *fnp; |
69dcadff | 252 | { |
2cb921f4 | 253 | if (flag_really_no_inline |
6aa77e6c AH |
254 | && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp)) == NULL) |
255 | return 1; | |
256 | ||
69dcadff AO |
257 | return 0; |
258 | } | |
259 | ||
260 | /* lang_hooks.tree_inlining.disregard_inline_limits is called to | |
261 | determine whether a function should be considered for inlining even | |
262 | if it would exceed inlining limits. */ | |
263 | ||
264 | int | |
d23c55c2 | 265 | lhd_tree_inlining_disregard_inline_limits (fn) |
6aa77e6c | 266 | tree fn; |
69dcadff | 267 | { |
6aa77e6c AH |
268 | if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL) |
269 | return 1; | |
270 | ||
69dcadff AO |
271 | return 0; |
272 | } | |
273 | ||
274 | /* lang_hooks.tree_inlining.add_pending_fn_decls is called before | |
275 | starting to inline a function, to push any language-specific | |
276 | functions that should not be inlined into the current function, | |
277 | into VAFNP. PFN is the top of varray, and should be returned if no | |
278 | functions are pushed into VAFNP. The top of the varray should be | |
279 | returned. */ | |
280 | ||
281 | tree | |
d23c55c2 | 282 | lhd_tree_inlining_add_pending_fn_decls (vafnp, pfn) |
69dcadff AO |
283 | void *vafnp ATTRIBUTE_UNUSED; |
284 | tree pfn; | |
285 | { | |
286 | return pfn; | |
287 | } | |
288 | ||
289 | /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the | |
290 | TREE_CHAIN of a language-specific tree node is relevant, i.e., | |
291 | whether it should be walked, copied and preserved across copies. */ | |
292 | ||
293 | int | |
d23c55c2 | 294 | lhd_tree_inlining_tree_chain_matters_p (t) |
69dcadff AO |
295 | tree t ATTRIBUTE_UNUSED; |
296 | { | |
297 | return 0; | |
298 | } | |
299 | ||
300 | /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine | |
301 | whether VT is an automatic variable defined in function FT. */ | |
302 | ||
303 | int | |
d23c55c2 | 304 | lhd_tree_inlining_auto_var_in_fn_p (var, fn) |
69dcadff AO |
305 | tree var, fn; |
306 | { | |
307 | return (DECL_P (var) && DECL_CONTEXT (var) == fn | |
308 | && (((TREE_CODE (var) == VAR_DECL || TREE_CODE (var) == PARM_DECL) | |
309 | && ! TREE_STATIC (var)) | |
310 | || TREE_CODE (var) == LABEL_DECL | |
311 | || TREE_CODE (var) == RESULT_DECL)); | |
312 | } | |
313 | ||
314 | /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a | |
315 | declaration for the result RES of function FN to be inlined into | |
316 | CALLER. NDP points to an integer that should be set in case a new | |
317 | declaration wasn't created (presumably because RES was of aggregate | |
318 | type, such that a TARGET_EXPR is used for the result). TEXPS is a | |
319 | pointer to a varray with the stack of TARGET_EXPRs seen while | |
320 | inlining functions into caller; the top of TEXPS is supposed to | |
321 | match RES. */ | |
322 | ||
323 | tree | |
d23c55c2 NB |
324 | lhd_tree_inlining_copy_res_decl_for_inlining (res, fn, caller, |
325 | dm, ndp, texps) | |
69dcadff AO |
326 | tree res, fn, caller; |
327 | void *dm ATTRIBUTE_UNUSED; | |
328 | int *ndp ATTRIBUTE_UNUSED; | |
329 | void *texps ATTRIBUTE_UNUSED; | |
330 | { | |
331 | return copy_decl_for_inlining (res, fn, caller); | |
332 | } | |
333 | ||
334 | /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a | |
335 | type node representing an anonymous aggregate (union, struct, etc), | |
336 | i.e., one whose members are in the same scope as the union itself. */ | |
337 | ||
338 | int | |
d23c55c2 | 339 | lhd_tree_inlining_anon_aggr_type_p (t) |
69dcadff AO |
340 | tree t ATTRIBUTE_UNUSED; |
341 | { | |
342 | return 0; | |
343 | } | |
344 | ||
742a37d5 JM |
345 | /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any |
346 | language-specific bookkeeping necessary for processing | |
347 | FN. start_inlining returns non-zero if inlining should proceed, zero if | |
348 | not. | |
349 | ||
350 | For instance, the C++ version keeps track of template instantiations to | |
351 | avoid infinite recursion. */ | |
352 | ||
353 | int | |
354 | lhd_tree_inlining_start_inlining (fn) | |
355 | tree fn ATTRIBUTE_UNUSED; | |
356 | { | |
357 | return 1; | |
358 | } | |
359 | ||
360 | void | |
361 | lhd_tree_inlining_end_inlining (fn) | |
362 | tree fn ATTRIBUTE_UNUSED; | |
363 | { | |
364 | } | |
365 | ||
f735a153 JJ |
366 | /* lang_hooks.tree_inlining.convert_parm_for_inlining performs any |
367 | language-specific conversion before assigning VALUE to PARM. */ | |
368 | ||
369 | tree | |
370 | lhd_tree_inlining_convert_parm_for_inlining (parm, value, fndecl) | |
371 | tree parm ATTRIBUTE_UNUSED; | |
372 | tree value; | |
373 | tree fndecl ATTRIBUTE_UNUSED; | |
374 | { | |
375 | return value; | |
376 | } | |
377 | ||
89d684bb BM |
378 | /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree |
379 | nodes. Returns non-zero if it does not want the usual dumping of the | |
380 | second argument. */ | |
381 | ||
382 | int | |
383 | lhd_tree_dump_dump_tree (di, t) | |
384 | void *di ATTRIBUTE_UNUSED; | |
385 | tree t ATTRIBUTE_UNUSED; | |
386 | { | |
387 | return 0; | |
388 | } | |
389 | ||
390 | /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a | |
391 | language-specific way. */ | |
392 | ||
393 | int | |
394 | lhd_tree_dump_type_quals (t) | |
395 | tree t; | |
396 | { | |
397 | return TYPE_QUALS (t); | |
398 | } | |
399 |