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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 | ||
98 | /* Called from staticp. */ | |
99 | ||
100 | int | |
101 | lhd_staticp (exp) | |
990290e8 | 102 | tree exp ATTRIBUTE_UNUSED; |
d062a680 JM |
103 | { |
104 | return 0; | |
5d69f816 NB |
105 | } |
106 | ||
107 | /* Called when -dy is given on the command line. */ | |
108 | ||
109 | void | |
110 | lhd_set_yydebug (value) | |
111 | int value; | |
112 | { | |
113 | if (value) | |
114 | fprintf (stderr, "warning: no yacc/bison-generated output to debug!\n"); | |
115 | } | |
116 | ||
37207ee7 ZW |
117 | /* Provide a default routine to clear the binding stack. This is used |
118 | by languages that don't need to do anything special. */ | |
119 | void | |
d23c55c2 | 120 | lhd_clear_binding_stack () |
37207ee7 | 121 | { |
43577e6b | 122 | while (! (*lang_hooks.decls.global_bindings_p) ()) |
37207ee7 ZW |
123 | poplevel (0, 0, 0); |
124 | } | |
125 | ||
126 | /* Provide a default routine for alias sets that always returns -1. This | |
127 | is used by languages that don't need to do anything special. */ | |
128 | ||
129 | HOST_WIDE_INT | |
d23c55c2 | 130 | lhd_get_alias_set (t) |
37207ee7 ZW |
131 | tree t ATTRIBUTE_UNUSED; |
132 | { | |
133 | return -1; | |
134 | } | |
135 | ||
8ac61af7 RK |
136 | /* Provide a hook routine for alias sets that always returns 0. This is |
137 | used by languages that haven't deal with alias sets yet. */ | |
138 | ||
139 | HOST_WIDE_INT | |
140 | hook_get_alias_set_0 (t) | |
141 | tree t ATTRIBUTE_UNUSED; | |
142 | { | |
143 | return 0; | |
144 | } | |
145 | ||
c9d892a8 NB |
146 | /* This is the default expand_expr function. */ |
147 | ||
148 | rtx | |
149 | lhd_expand_expr (t, r, mm, em) | |
150 | tree t ATTRIBUTE_UNUSED; | |
151 | rtx r ATTRIBUTE_UNUSED; | |
152 | enum machine_mode mm ATTRIBUTE_UNUSED; | |
153 | int em ATTRIBUTE_UNUSED; | |
154 | { | |
155 | abort (); | |
156 | } | |
157 | ||
7afff7cf NB |
158 | /* This is the default decl_printable_name function. */ |
159 | ||
160 | const char * | |
161 | lhd_decl_printable_name (decl, verbosity) | |
162 | tree decl; | |
163 | int verbosity ATTRIBUTE_UNUSED; | |
164 | { | |
165 | return IDENTIFIER_POINTER (DECL_NAME (decl)); | |
166 | } | |
167 | ||
69dcadff AO |
168 | /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree() |
169 | after handling common cases, but before walking code-specific | |
170 | sub-trees. If this hook is overridden for a language, it should | |
171 | handle language-specific tree codes, as well as language-specific | |
172 | information associated to common tree codes. If a tree node is | |
173 | completely handled within this function, it should set *SUBTREES to | |
174 | 0, so that generic handling isn't attempted. For language-specific | |
175 | tree codes, generic handling would abort(), so make sure it is set | |
176 | properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero | |
177 | when the function is called. */ | |
178 | ||
179 | tree | |
d23c55c2 | 180 | lhd_tree_inlining_walk_subtrees (tp,subtrees,func,data,htab) |
69dcadff AO |
181 | tree *tp ATTRIBUTE_UNUSED; |
182 | int *subtrees ATTRIBUTE_UNUSED; | |
183 | walk_tree_fn func ATTRIBUTE_UNUSED; | |
184 | void *data ATTRIBUTE_UNUSED; | |
185 | void *htab ATTRIBUTE_UNUSED; | |
186 | { | |
187 | return NULL_TREE; | |
188 | } | |
189 | ||
190 | /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to | |
191 | determine whether there are language-specific reasons for not | |
192 | inlining a given function. */ | |
193 | ||
194 | int | |
d23c55c2 | 195 | lhd_tree_inlining_cannot_inline_tree_fn (fnp) |
6aa77e6c | 196 | tree *fnp; |
69dcadff | 197 | { |
2cb921f4 | 198 | if (flag_really_no_inline |
6aa77e6c AH |
199 | && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp)) == NULL) |
200 | return 1; | |
201 | ||
69dcadff AO |
202 | return 0; |
203 | } | |
204 | ||
205 | /* lang_hooks.tree_inlining.disregard_inline_limits is called to | |
206 | determine whether a function should be considered for inlining even | |
207 | if it would exceed inlining limits. */ | |
208 | ||
209 | int | |
d23c55c2 | 210 | lhd_tree_inlining_disregard_inline_limits (fn) |
6aa77e6c | 211 | tree fn; |
69dcadff | 212 | { |
6aa77e6c AH |
213 | if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL) |
214 | return 1; | |
215 | ||
69dcadff AO |
216 | return 0; |
217 | } | |
218 | ||
219 | /* lang_hooks.tree_inlining.add_pending_fn_decls is called before | |
220 | starting to inline a function, to push any language-specific | |
221 | functions that should not be inlined into the current function, | |
222 | into VAFNP. PFN is the top of varray, and should be returned if no | |
223 | functions are pushed into VAFNP. The top of the varray should be | |
224 | returned. */ | |
225 | ||
226 | tree | |
d23c55c2 | 227 | lhd_tree_inlining_add_pending_fn_decls (vafnp, pfn) |
69dcadff AO |
228 | void *vafnp ATTRIBUTE_UNUSED; |
229 | tree pfn; | |
230 | { | |
231 | return pfn; | |
232 | } | |
233 | ||
234 | /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the | |
235 | TREE_CHAIN of a language-specific tree node is relevant, i.e., | |
236 | whether it should be walked, copied and preserved across copies. */ | |
237 | ||
238 | int | |
d23c55c2 | 239 | lhd_tree_inlining_tree_chain_matters_p (t) |
69dcadff AO |
240 | tree t ATTRIBUTE_UNUSED; |
241 | { | |
242 | return 0; | |
243 | } | |
244 | ||
245 | /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine | |
246 | whether VT is an automatic variable defined in function FT. */ | |
247 | ||
248 | int | |
d23c55c2 | 249 | lhd_tree_inlining_auto_var_in_fn_p (var, fn) |
69dcadff AO |
250 | tree var, fn; |
251 | { | |
252 | return (DECL_P (var) && DECL_CONTEXT (var) == fn | |
253 | && (((TREE_CODE (var) == VAR_DECL || TREE_CODE (var) == PARM_DECL) | |
254 | && ! TREE_STATIC (var)) | |
255 | || TREE_CODE (var) == LABEL_DECL | |
256 | || TREE_CODE (var) == RESULT_DECL)); | |
257 | } | |
258 | ||
259 | /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a | |
260 | declaration for the result RES of function FN to be inlined into | |
261 | CALLER. NDP points to an integer that should be set in case a new | |
262 | declaration wasn't created (presumably because RES was of aggregate | |
263 | type, such that a TARGET_EXPR is used for the result). TEXPS is a | |
264 | pointer to a varray with the stack of TARGET_EXPRs seen while | |
265 | inlining functions into caller; the top of TEXPS is supposed to | |
266 | match RES. */ | |
267 | ||
268 | tree | |
d23c55c2 NB |
269 | lhd_tree_inlining_copy_res_decl_for_inlining (res, fn, caller, |
270 | dm, ndp, texps) | |
69dcadff AO |
271 | tree res, fn, caller; |
272 | void *dm ATTRIBUTE_UNUSED; | |
273 | int *ndp ATTRIBUTE_UNUSED; | |
274 | void *texps ATTRIBUTE_UNUSED; | |
275 | { | |
276 | return copy_decl_for_inlining (res, fn, caller); | |
277 | } | |
278 | ||
279 | /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a | |
280 | type node representing an anonymous aggregate (union, struct, etc), | |
281 | i.e., one whose members are in the same scope as the union itself. */ | |
282 | ||
283 | int | |
d23c55c2 | 284 | lhd_tree_inlining_anon_aggr_type_p (t) |
69dcadff AO |
285 | tree t ATTRIBUTE_UNUSED; |
286 | { | |
287 | return 0; | |
288 | } | |
289 | ||
742a37d5 JM |
290 | /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any |
291 | language-specific bookkeeping necessary for processing | |
292 | FN. start_inlining returns non-zero if inlining should proceed, zero if | |
293 | not. | |
294 | ||
295 | For instance, the C++ version keeps track of template instantiations to | |
296 | avoid infinite recursion. */ | |
297 | ||
298 | int | |
299 | lhd_tree_inlining_start_inlining (fn) | |
300 | tree fn ATTRIBUTE_UNUSED; | |
301 | { | |
302 | return 1; | |
303 | } | |
304 | ||
305 | void | |
306 | lhd_tree_inlining_end_inlining (fn) | |
307 | tree fn ATTRIBUTE_UNUSED; | |
308 | { | |
309 | } | |
310 | ||
f735a153 JJ |
311 | /* lang_hooks.tree_inlining.convert_parm_for_inlining performs any |
312 | language-specific conversion before assigning VALUE to PARM. */ | |
313 | ||
314 | tree | |
315 | lhd_tree_inlining_convert_parm_for_inlining (parm, value, fndecl) | |
316 | tree parm ATTRIBUTE_UNUSED; | |
317 | tree value; | |
318 | tree fndecl ATTRIBUTE_UNUSED; | |
319 | { | |
320 | return value; | |
321 | } | |
322 | ||
89d684bb BM |
323 | /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree |
324 | nodes. Returns non-zero if it does not want the usual dumping of the | |
325 | second argument. */ | |
326 | ||
327 | int | |
328 | lhd_tree_dump_dump_tree (di, t) | |
329 | void *di ATTRIBUTE_UNUSED; | |
330 | tree t ATTRIBUTE_UNUSED; | |
331 | { | |
332 | return 0; | |
333 | } | |
334 | ||
335 | /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a | |
336 | language-specific way. */ | |
337 | ||
338 | int | |
339 | lhd_tree_dump_type_quals (t) | |
340 | tree t; | |
341 | { | |
342 | return TYPE_QUALS (t); | |
343 | } | |
344 |