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69dcadff AO |
1 | /* Default language-specific hooks. |
2 | Copyright 2001 Free Software Foundation, Inc. | |
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 | ||
77b1a921 | 59 | /* Do nothing; the default hook to decode an option. */ |
8ac61af7 | 60 | |
77b1a921 | 61 | int |
d23c55c2 | 62 | lhd_decode_option (argc, argv) |
77b1a921 NB |
63 | int argc ATTRIBUTE_UNUSED; |
64 | char **argv ATTRIBUTE_UNUSED; | |
65 | { | |
66 | return 0; | |
67 | } | |
69dcadff | 68 | |
5d69f816 NB |
69 | /* Called from by print-tree.c. */ |
70 | ||
71 | void | |
72 | lhd_print_tree_nothing (file, node, indent) | |
73 | FILE *file ATTRIBUTE_UNUSED; | |
74 | tree node ATTRIBUTE_UNUSED; | |
75 | int indent ATTRIBUTE_UNUSED; | |
76 | { | |
ac79cd5a RK |
77 | } |
78 | ||
79 | /* Called from safe_from_p. */ | |
80 | ||
81 | int | |
82 | lhd_safe_from_p (x, exp) | |
f80230c1 RK |
83 | rtx x ATTRIBUTE_UNUSED; |
84 | tree exp ATTRIBUTE_UNUSED; | |
ac79cd5a RK |
85 | { |
86 | return 1; | |
d062a680 JM |
87 | } |
88 | ||
89 | /* Called from staticp. */ | |
90 | ||
91 | int | |
92 | lhd_staticp (exp) | |
990290e8 | 93 | tree exp ATTRIBUTE_UNUSED; |
d062a680 JM |
94 | { |
95 | return 0; | |
5d69f816 NB |
96 | } |
97 | ||
98 | /* Called when -dy is given on the command line. */ | |
99 | ||
100 | void | |
101 | lhd_set_yydebug (value) | |
102 | int value; | |
103 | { | |
104 | if (value) | |
105 | fprintf (stderr, "warning: no yacc/bison-generated output to debug!\n"); | |
106 | } | |
107 | ||
37207ee7 ZW |
108 | /* Provide a default routine to clear the binding stack. This is used |
109 | by languages that don't need to do anything special. */ | |
110 | void | |
d23c55c2 | 111 | lhd_clear_binding_stack () |
37207ee7 ZW |
112 | { |
113 | while (! global_bindings_p ()) | |
114 | poplevel (0, 0, 0); | |
115 | } | |
116 | ||
117 | /* Provide a default routine for alias sets that always returns -1. This | |
118 | is used by languages that don't need to do anything special. */ | |
119 | ||
120 | HOST_WIDE_INT | |
d23c55c2 | 121 | lhd_get_alias_set (t) |
37207ee7 ZW |
122 | tree t ATTRIBUTE_UNUSED; |
123 | { | |
124 | return -1; | |
125 | } | |
126 | ||
8ac61af7 RK |
127 | /* Provide a hook routine for alias sets that always returns 0. This is |
128 | used by languages that haven't deal with alias sets yet. */ | |
129 | ||
130 | HOST_WIDE_INT | |
131 | hook_get_alias_set_0 (t) | |
132 | tree t ATTRIBUTE_UNUSED; | |
133 | { | |
134 | return 0; | |
135 | } | |
136 | ||
69dcadff AO |
137 | /* lang_hooks.tree_inlining.walk_subtrees is called by walk_tree() |
138 | after handling common cases, but before walking code-specific | |
139 | sub-trees. If this hook is overridden for a language, it should | |
140 | handle language-specific tree codes, as well as language-specific | |
141 | information associated to common tree codes. If a tree node is | |
142 | completely handled within this function, it should set *SUBTREES to | |
143 | 0, so that generic handling isn't attempted. For language-specific | |
144 | tree codes, generic handling would abort(), so make sure it is set | |
145 | properly. Both SUBTREES and *SUBTREES is guaranteed to be non-zero | |
146 | when the function is called. */ | |
147 | ||
148 | tree | |
d23c55c2 | 149 | lhd_tree_inlining_walk_subtrees (tp,subtrees,func,data,htab) |
69dcadff AO |
150 | tree *tp ATTRIBUTE_UNUSED; |
151 | int *subtrees ATTRIBUTE_UNUSED; | |
152 | walk_tree_fn func ATTRIBUTE_UNUSED; | |
153 | void *data ATTRIBUTE_UNUSED; | |
154 | void *htab ATTRIBUTE_UNUSED; | |
155 | { | |
156 | return NULL_TREE; | |
157 | } | |
158 | ||
159 | /* lang_hooks.tree_inlining.cannot_inline_tree_fn is called to | |
160 | determine whether there are language-specific reasons for not | |
161 | inlining a given function. */ | |
162 | ||
163 | int | |
d23c55c2 | 164 | lhd_tree_inlining_cannot_inline_tree_fn (fnp) |
6aa77e6c | 165 | tree *fnp; |
69dcadff | 166 | { |
6aa77e6c AH |
167 | if (optimize == 0 |
168 | && lookup_attribute ("always_inline", DECL_ATTRIBUTES (*fnp)) == NULL) | |
169 | return 1; | |
170 | ||
69dcadff AO |
171 | return 0; |
172 | } | |
173 | ||
174 | /* lang_hooks.tree_inlining.disregard_inline_limits is called to | |
175 | determine whether a function should be considered for inlining even | |
176 | if it would exceed inlining limits. */ | |
177 | ||
178 | int | |
d23c55c2 | 179 | lhd_tree_inlining_disregard_inline_limits (fn) |
6aa77e6c | 180 | tree fn; |
69dcadff | 181 | { |
6aa77e6c AH |
182 | if (lookup_attribute ("always_inline", DECL_ATTRIBUTES (fn)) != NULL) |
183 | return 1; | |
184 | ||
69dcadff AO |
185 | return 0; |
186 | } | |
187 | ||
188 | /* lang_hooks.tree_inlining.add_pending_fn_decls is called before | |
189 | starting to inline a function, to push any language-specific | |
190 | functions that should not be inlined into the current function, | |
191 | into VAFNP. PFN is the top of varray, and should be returned if no | |
192 | functions are pushed into VAFNP. The top of the varray should be | |
193 | returned. */ | |
194 | ||
195 | tree | |
d23c55c2 | 196 | lhd_tree_inlining_add_pending_fn_decls (vafnp, pfn) |
69dcadff AO |
197 | void *vafnp ATTRIBUTE_UNUSED; |
198 | tree pfn; | |
199 | { | |
200 | return pfn; | |
201 | } | |
202 | ||
203 | /* lang_hooks.tree_inlining.tree_chain_matters_p indicates whether the | |
204 | TREE_CHAIN of a language-specific tree node is relevant, i.e., | |
205 | whether it should be walked, copied and preserved across copies. */ | |
206 | ||
207 | int | |
d23c55c2 | 208 | lhd_tree_inlining_tree_chain_matters_p (t) |
69dcadff AO |
209 | tree t ATTRIBUTE_UNUSED; |
210 | { | |
211 | return 0; | |
212 | } | |
213 | ||
214 | /* lang_hooks.tree_inlining.auto_var_in_fn_p is called to determine | |
215 | whether VT is an automatic variable defined in function FT. */ | |
216 | ||
217 | int | |
d23c55c2 | 218 | lhd_tree_inlining_auto_var_in_fn_p (var, fn) |
69dcadff AO |
219 | tree var, fn; |
220 | { | |
221 | return (DECL_P (var) && DECL_CONTEXT (var) == fn | |
222 | && (((TREE_CODE (var) == VAR_DECL || TREE_CODE (var) == PARM_DECL) | |
223 | && ! TREE_STATIC (var)) | |
224 | || TREE_CODE (var) == LABEL_DECL | |
225 | || TREE_CODE (var) == RESULT_DECL)); | |
226 | } | |
227 | ||
228 | /* lang_hooks.tree_inlining.copy_res_decl_for_inlining should return a | |
229 | declaration for the result RES of function FN to be inlined into | |
230 | CALLER. NDP points to an integer that should be set in case a new | |
231 | declaration wasn't created (presumably because RES was of aggregate | |
232 | type, such that a TARGET_EXPR is used for the result). TEXPS is a | |
233 | pointer to a varray with the stack of TARGET_EXPRs seen while | |
234 | inlining functions into caller; the top of TEXPS is supposed to | |
235 | match RES. */ | |
236 | ||
237 | tree | |
d23c55c2 NB |
238 | lhd_tree_inlining_copy_res_decl_for_inlining (res, fn, caller, |
239 | dm, ndp, texps) | |
69dcadff AO |
240 | tree res, fn, caller; |
241 | void *dm ATTRIBUTE_UNUSED; | |
242 | int *ndp ATTRIBUTE_UNUSED; | |
243 | void *texps ATTRIBUTE_UNUSED; | |
244 | { | |
245 | return copy_decl_for_inlining (res, fn, caller); | |
246 | } | |
247 | ||
248 | /* lang_hooks.tree_inlining.anon_aggr_type_p determines whether T is a | |
249 | type node representing an anonymous aggregate (union, struct, etc), | |
250 | i.e., one whose members are in the same scope as the union itself. */ | |
251 | ||
252 | int | |
d23c55c2 | 253 | lhd_tree_inlining_anon_aggr_type_p (t) |
69dcadff AO |
254 | tree t ATTRIBUTE_UNUSED; |
255 | { | |
256 | return 0; | |
257 | } | |
258 | ||
742a37d5 JM |
259 | /* lang_hooks.tree_inlining.start_inlining and end_inlining perform any |
260 | language-specific bookkeeping necessary for processing | |
261 | FN. start_inlining returns non-zero if inlining should proceed, zero if | |
262 | not. | |
263 | ||
264 | For instance, the C++ version keeps track of template instantiations to | |
265 | avoid infinite recursion. */ | |
266 | ||
267 | int | |
268 | lhd_tree_inlining_start_inlining (fn) | |
269 | tree fn ATTRIBUTE_UNUSED; | |
270 | { | |
271 | return 1; | |
272 | } | |
273 | ||
274 | void | |
275 | lhd_tree_inlining_end_inlining (fn) | |
276 | tree fn ATTRIBUTE_UNUSED; | |
277 | { | |
278 | } | |
279 | ||
f735a153 JJ |
280 | /* lang_hooks.tree_inlining.convert_parm_for_inlining performs any |
281 | language-specific conversion before assigning VALUE to PARM. */ | |
282 | ||
283 | tree | |
284 | lhd_tree_inlining_convert_parm_for_inlining (parm, value, fndecl) | |
285 | tree parm ATTRIBUTE_UNUSED; | |
286 | tree value; | |
287 | tree fndecl ATTRIBUTE_UNUSED; | |
288 | { | |
289 | return value; | |
290 | } | |
291 | ||
89d684bb BM |
292 | /* lang_hooks.tree_dump.dump_tree: Dump language-specific parts of tree |
293 | nodes. Returns non-zero if it does not want the usual dumping of the | |
294 | second argument. */ | |
295 | ||
296 | int | |
297 | lhd_tree_dump_dump_tree (di, t) | |
298 | void *di ATTRIBUTE_UNUSED; | |
299 | tree t ATTRIBUTE_UNUSED; | |
300 | { | |
301 | return 0; | |
302 | } | |
303 | ||
304 | /* lang_hooks.tree_dump.type_qual: Determine type qualifiers in a | |
305 | language-specific way. */ | |
306 | ||
307 | int | |
308 | lhd_tree_dump_type_quals (t) | |
309 | tree t; | |
310 | { | |
311 | return TYPE_QUALS (t); | |
312 | } | |
313 |