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5dd72fac | 1 | /* Some code common to C++ and ObjC++ front ends. |
f1717362 | 2 | Copyright (C) 2004-2016 Free Software Foundation, Inc. |
5dd72fac | 3 | Contributed by Ziemowit Laski <zlaski@apple.com> |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
aa139c3f | 9 | Software Foundation; either version 3, or (at your option) any later |
5dd72fac | 10 | version. |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
aa139c3f | 18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
5dd72fac | 20 | |
21 | #include "config.h" | |
22 | #include "system.h" | |
23 | #include "coretypes.h" | |
5dd72fac | 24 | #include "cp-tree.h" |
5dd72fac | 25 | #include "cp-objcp-common.h" |
26 | ||
27 | /* Special routine to get the alias set for C++. */ | |
28 | ||
32c2fdea | 29 | alias_set_type |
5dd72fac | 30 | cxx_get_alias_set (tree t) |
31 | { | |
32 | if (IS_FAKE_BASE_TYPE (t)) | |
33 | /* The base variant of a type must be in the same alias set as the | |
34 | complete type. */ | |
35 | return get_alias_set (TYPE_CONTEXT (t)); | |
36 | ||
37 | /* Punt on PMFs until we canonicalize functions properly. */ | |
f607c97b | 38 | if (TYPE_PTRMEMFUNC_P (t) |
39 | || (POINTER_TYPE_P (t) | |
40 | && TYPE_PTRMEMFUNC_P (TREE_TYPE (t)))) | |
5dd72fac | 41 | return 0; |
42 | ||
43 | return c_common_get_alias_set (t); | |
44 | } | |
45 | ||
3a1c9df2 | 46 | /* Called from check_global_declaration. */ |
5dd72fac | 47 | |
48 | bool | |
f8fd23c0 | 49 | cxx_warn_unused_global_decl (const_tree decl) |
5dd72fac | 50 | { |
51 | if (TREE_CODE (decl) == FUNCTION_DECL && DECL_DECLARED_INLINE_P (decl)) | |
52 | return false; | |
53 | if (DECL_IN_SYSTEM_HEADER (decl)) | |
54 | return false; | |
55 | ||
5dd72fac | 56 | return true; |
57 | } | |
58 | ||
5dd72fac | 59 | /* Langhook for tree_size: determine size of our 'x' and 'c' nodes. */ |
60 | size_t | |
61 | cp_tree_size (enum tree_code code) | |
62 | { | |
63 | switch (code) | |
64 | { | |
653e5405 | 65 | case PTRMEM_CST: return sizeof (struct ptrmem_cst); |
5dd72fac | 66 | case BASELINK: return sizeof (struct tree_baselink); |
653e5405 | 67 | case TEMPLATE_PARM_INDEX: return sizeof (template_parm_index); |
5dd72fac | 68 | case DEFAULT_ARG: return sizeof (struct tree_default_arg); |
6bb4902d | 69 | case DEFERRED_NOEXCEPT: return sizeof (struct tree_deferred_noexcept); |
5dd72fac | 70 | case OVERLOAD: return sizeof (struct tree_overload); |
7a05c4b1 | 71 | case STATIC_ASSERT: return sizeof (struct tree_static_assert); |
d95d815d | 72 | case TYPE_ARGUMENT_PACK: |
73 | case TYPE_PACK_EXPANSION: | |
74 | return sizeof (struct tree_common); | |
75 | ||
76 | case NONTYPE_ARGUMENT_PACK: | |
77 | case EXPR_PACK_EXPANSION: | |
78 | return sizeof (struct tree_exp); | |
79 | ||
80 | case ARGUMENT_PACK_SELECT: | |
81 | return sizeof (struct tree_argument_pack_select); | |
82 | ||
481451eb | 83 | case TRAIT_EXPR: |
84 | return sizeof (struct tree_trait_expr); | |
85 | ||
a8b75081 | 86 | case LAMBDA_EXPR: return sizeof (struct tree_lambda_expr); |
87 | ||
b08c3803 | 88 | case TEMPLATE_INFO: return sizeof (struct tree_template_info); |
89 | ||
56c12fd4 | 90 | case CONSTRAINT_INFO: return sizeof (struct tree_constraint_info); |
91 | ||
244db24d | 92 | case USERDEF_LITERAL: return sizeof (struct tree_userdef_literal); |
93 | ||
83c7dcd8 | 94 | case TEMPLATE_DECL: return sizeof (struct tree_template_decl); |
95 | ||
5dd72fac | 96 | default: |
83c7dcd8 | 97 | if (TREE_CODE_CLASS (code) == tcc_declaration) |
98 | return sizeof (struct tree_decl_non_common); | |
5dd72fac | 99 | gcc_unreachable (); |
100 | } | |
101 | /* NOTREACHED */ | |
102 | } | |
103 | ||
104 | /* Returns true if T is a variably modified type, in the sense of C99. | |
105 | FN is as passed to variably_modified_p. | |
106 | This routine needs only check cases that cannot be handled by the | |
107 | language-independent logic in tree.c. */ | |
108 | ||
109 | bool | |
110 | cp_var_mod_type_p (tree type, tree fn) | |
111 | { | |
112 | /* If TYPE is a pointer-to-member, it is variably modified if either | |
113 | the class or the member are variably modified. */ | |
05765a91 | 114 | if (TYPE_PTRMEM_P (type)) |
5dd72fac | 115 | return (variably_modified_type_p (TYPE_PTRMEM_CLASS_TYPE (type), fn) |
116 | || variably_modified_type_p (TYPE_PTRMEM_POINTED_TO_TYPE (type), | |
117 | fn)); | |
118 | ||
119 | /* All other types are not variably modified. */ | |
120 | return false; | |
121 | } | |
122 | ||
3dac5c5e | 123 | /* This compares two types for equivalence ("compatible" in C-based languages). |
124 | This routine should only return 1 if it is sure. It should not be used | |
125 | in contexts where erroneously returning 0 causes problems. */ | |
126 | ||
127 | int | |
128 | cxx_types_compatible_p (tree x, tree y) | |
129 | { | |
29f51994 | 130 | return same_type_ignoring_top_level_qualifiers_p (x, y); |
3dac5c5e | 131 | } |
132 | ||
cb3582e7 | 133 | /* Return true if DECL is explicit member function. */ |
134 | ||
135 | bool | |
136 | cp_function_decl_explicit_p (tree decl) | |
137 | { | |
138 | return (decl | |
4143d08b | 139 | && DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl)) |
cb3582e7 | 140 | && DECL_NONCONVERTING_P (decl)); |
141 | } | |
142 | ||
77cab475 | 143 | /* Return true if DECL is deleted special member function. */ |
144 | ||
145 | bool | |
146 | cp_function_decl_deleted_p (tree decl) | |
147 | { | |
148 | return (decl | |
149 | && DECL_LANG_SPECIFIC (STRIP_TEMPLATE (decl)) | |
150 | && DECL_DELETED_FN (decl)); | |
151 | } | |
152 | ||
5dd72fac | 153 | /* Stubs to keep c-opts.c happy. */ |
154 | void | |
155 | push_file_scope (void) | |
156 | { | |
157 | } | |
158 | ||
159 | void | |
160 | pop_file_scope (void) | |
161 | { | |
162 | } | |
163 | ||
164 | /* c-pragma.c needs to query whether a decl has extern "C" linkage. */ | |
165 | bool | |
9f627b1a | 166 | has_c_linkage (const_tree decl) |
5dd72fac | 167 | { |
168 | return DECL_EXTERN_C_P (decl); | |
169 | } | |
4dd41a12 | 170 | |
d1023d12 | 171 | static GTY ((cache)) |
172 | hash_table<tree_decl_map_cache_hasher> *shadowed_var_for_decl; | |
4dd41a12 | 173 | |
174 | /* Lookup a shadowed var for FROM, and return it if we find one. */ | |
175 | ||
074ab442 | 176 | tree |
4dd41a12 | 177 | decl_shadowed_for_var_lookup (tree from) |
178 | { | |
cc194b6e | 179 | struct tree_decl_map *h, in; |
9af7fd5b | 180 | in.base.from = from; |
4dd41a12 | 181 | |
d1023d12 | 182 | h = shadowed_var_for_decl->find_with_hash (&in, DECL_UID (from)); |
4dd41a12 | 183 | if (h) |
184 | return h->to; | |
185 | return NULL_TREE; | |
186 | } | |
187 | ||
188 | /* Insert a mapping FROM->TO in the shadowed var hashtable. */ | |
189 | ||
190 | void | |
191 | decl_shadowed_for_var_insert (tree from, tree to) | |
192 | { | |
cc194b6e | 193 | struct tree_decl_map *h; |
4dd41a12 | 194 | |
25a27413 | 195 | h = ggc_alloc<tree_decl_map> (); |
9af7fd5b | 196 | h->base.from = from; |
4dd41a12 | 197 | h->to = to; |
d1023d12 | 198 | *shadowed_var_for_decl->find_slot_with_hash (h, DECL_UID (from), INSERT) = h; |
4dd41a12 | 199 | } |
200 | ||
201 | void | |
202 | init_shadowed_var_for_decl (void) | |
203 | { | |
d1023d12 | 204 | shadowed_var_for_decl |
205 | = hash_table<tree_decl_map_cache_hasher>::create_ggc (512); | |
4dd41a12 | 206 | } |
207 | ||
88aa6d3e | 208 | /* Return true if stmt can fall through. Used by block_may_fallthru |
6cb25bec | 209 | default case. */ |
210 | ||
211 | bool | |
212 | cxx_block_may_fallthru (const_tree stmt) | |
213 | { | |
214 | switch (TREE_CODE (stmt)) | |
215 | { | |
216 | case EXPR_STMT: | |
217 | return block_may_fallthru (EXPR_STMT_EXPR (stmt)); | |
218 | ||
219 | case THROW_EXPR: | |
220 | return false; | |
221 | ||
222 | default: | |
223 | return true; | |
224 | } | |
225 | } | |
226 | ||
9b88d08d | 227 | void |
228 | cp_common_init_ts (void) | |
229 | { | |
9b88d08d | 230 | MARK_TS_DECL_NON_COMMON (USING_DECL); |
83c7dcd8 | 231 | MARK_TS_DECL_COMMON (TEMPLATE_DECL); |
56c12fd4 | 232 | MARK_TS_DECL_COMMON (WILDCARD_DECL); |
9b88d08d | 233 | |
234 | MARK_TS_COMMON (TEMPLATE_TEMPLATE_PARM); | |
235 | MARK_TS_COMMON (TEMPLATE_TYPE_PARM); | |
236 | MARK_TS_COMMON (TEMPLATE_PARM_INDEX); | |
237 | MARK_TS_COMMON (OVERLOAD); | |
238 | MARK_TS_COMMON (TEMPLATE_INFO); | |
9b88d08d | 239 | MARK_TS_COMMON (TYPENAME_TYPE); |
240 | MARK_TS_COMMON (TYPEOF_TYPE); | |
8de5c43e | 241 | MARK_TS_COMMON (UNDERLYING_TYPE); |
9b88d08d | 242 | MARK_TS_COMMON (BASELINK); |
9b88d08d | 243 | MARK_TS_COMMON (TYPE_PACK_EXPANSION); |
b0801676 | 244 | MARK_TS_COMMON (TYPE_ARGUMENT_PACK); |
9b88d08d | 245 | MARK_TS_COMMON (DECLTYPE_TYPE); |
246 | MARK_TS_COMMON (BOUND_TEMPLATE_TEMPLATE_PARM); | |
247 | MARK_TS_COMMON (UNBOUND_CLASS_TEMPLATE); | |
9b88d08d | 248 | |
d558fa9c | 249 | MARK_TS_TYPED (EXPR_PACK_EXPANSION); |
1f919c50 | 250 | MARK_TS_TYPED (SWITCH_STMT); |
852787ab | 251 | MARK_TS_TYPED (IF_STMT); |
e45c9c55 | 252 | MARK_TS_TYPED (FOR_STMT); |
253 | MARK_TS_TYPED (RANGE_FOR_STMT); | |
9b88d08d | 254 | MARK_TS_TYPED (AGGR_INIT_EXPR); |
255 | MARK_TS_TYPED (EXPR_STMT); | |
256 | MARK_TS_TYPED (EH_SPEC_BLOCK); | |
257 | MARK_TS_TYPED (CLEANUP_STMT); | |
258 | MARK_TS_TYPED (SCOPE_REF); | |
259 | MARK_TS_TYPED (CAST_EXPR); | |
260 | MARK_TS_TYPED (NON_DEPENDENT_EXPR); | |
261 | MARK_TS_TYPED (MODOP_EXPR); | |
262 | MARK_TS_TYPED (TRY_BLOCK); | |
263 | MARK_TS_TYPED (THROW_EXPR); | |
264 | MARK_TS_TYPED (HANDLER); | |
265 | MARK_TS_TYPED (REINTERPRET_CAST_EXPR); | |
266 | MARK_TS_TYPED (CONST_CAST_EXPR); | |
267 | MARK_TS_TYPED (STATIC_CAST_EXPR); | |
268 | MARK_TS_TYPED (DYNAMIC_CAST_EXPR); | |
91c3ace5 | 269 | MARK_TS_TYPED (IMPLICIT_CONV_EXPR); |
9b88d08d | 270 | MARK_TS_TYPED (TEMPLATE_ID_EXPR); |
271 | MARK_TS_TYPED (ARROW_EXPR); | |
272 | MARK_TS_TYPED (SIZEOF_EXPR); | |
273 | MARK_TS_TYPED (ALIGNOF_EXPR); | |
274 | MARK_TS_TYPED (AT_ENCODE_EXPR); | |
275 | MARK_TS_TYPED (UNARY_PLUS_EXPR); | |
276 | MARK_TS_TYPED (TRAIT_EXPR); | |
277 | MARK_TS_TYPED (TYPE_ARGUMENT_PACK); | |
278 | MARK_TS_TYPED (NOEXCEPT_EXPR); | |
279 | MARK_TS_TYPED (NONTYPE_ARGUMENT_PACK); | |
280 | MARK_TS_TYPED (WHILE_STMT); | |
281 | MARK_TS_TYPED (NEW_EXPR); | |
282 | MARK_TS_TYPED (VEC_NEW_EXPR); | |
283 | MARK_TS_TYPED (BREAK_STMT); | |
284 | MARK_TS_TYPED (MEMBER_REF); | |
285 | MARK_TS_TYPED (DOTSTAR_EXPR); | |
286 | MARK_TS_TYPED (DO_STMT); | |
287 | MARK_TS_TYPED (DELETE_EXPR); | |
288 | MARK_TS_TYPED (VEC_DELETE_EXPR); | |
289 | MARK_TS_TYPED (CONTINUE_STMT); | |
290 | MARK_TS_TYPED (TAG_DEFN); | |
291 | MARK_TS_TYPED (PSEUDO_DTOR_EXPR); | |
292 | MARK_TS_TYPED (TYPEID_EXPR); | |
293 | MARK_TS_TYPED (MUST_NOT_THROW_EXPR); | |
294 | MARK_TS_TYPED (STMT_EXPR); | |
295 | MARK_TS_TYPED (OFFSET_REF); | |
296 | MARK_TS_TYPED (OFFSETOF_EXPR); | |
297 | MARK_TS_TYPED (PTRMEM_CST); | |
298 | MARK_TS_TYPED (EMPTY_CLASS_EXPR); | |
299 | MARK_TS_TYPED (VEC_INIT_EXPR); | |
300 | MARK_TS_TYPED (USING_STMT); | |
301 | MARK_TS_TYPED (LAMBDA_EXPR); | |
e2d6b6ce | 302 | MARK_TS_TYPED (CTOR_INITIALIZER); |
e9331eab | 303 | MARK_TS_TYPED (ARRAY_NOTATION_REF); |
56c12fd4 | 304 | MARK_TS_TYPED (REQUIRES_EXPR); |
a4c3da45 | 305 | MARK_TS_TYPED (UNARY_LEFT_FOLD_EXPR); |
306 | MARK_TS_TYPED (UNARY_RIGHT_FOLD_EXPR); | |
307 | MARK_TS_TYPED (BINARY_LEFT_FOLD_EXPR); | |
308 | MARK_TS_TYPED (BINARY_RIGHT_FOLD_EXPR); | |
9b88d08d | 309 | } |
4dd41a12 | 310 | |
311 | #include "gt-cp-cp-objcp-common.h" |