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19551f29 | 1 | /* Language-dependent hooks for C++. |
a5544970 | 2 | Copyright (C) 2001-2019 Free Software Foundation, Inc. |
19551f29 AO |
3 | Contributed by Alexandre Oliva <aoliva@redhat.com> |
4 | ||
f5adbb8d | 5 | This file is part of GCC. |
19551f29 | 6 | |
f5adbb8d | 7 | GCC is free software; you can redistribute it and/or modify |
19551f29 | 8 | it under the terms of the GNU General Public License as published by |
e77f031d | 9 | the Free Software Foundation; either version 3, or (at your option) |
19551f29 AO |
10 | any later version. |
11 | ||
f5adbb8d | 12 | GCC is distributed in the hope that it will be useful, |
19551f29 AO |
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 | |
e77f031d NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
19551f29 AO |
20 | |
21 | #include "config.h" | |
22 | #include "system.h" | |
4977bab6 | 23 | #include "coretypes.h" |
19551f29 | 24 | #include "cp-tree.h" |
2adfab87 | 25 | #include "stor-layout.h" |
19551f29 | 26 | #include "langhooks.h" |
d23c55c2 | 27 | #include "langhooks-def.h" |
11bb4b27 | 28 | #include "cp-objcp-common.h" |
19551f29 | 29 | |
37fa72e9 | 30 | enum c_language_kind c_language = clk_cxx; |
a0ad3539 | 31 | static const char * cxx_dwarf_name (tree t, int verbosity); |
394d9fe7 | 32 | static enum classify_record cp_classify_record (tree type); |
f9417da1 | 33 | static tree cp_eh_personality (void); |
f8fb7295 DS |
34 | static tree get_template_innermost_arguments_folded (const_tree); |
35 | static tree get_template_argument_pack_elems_folded (const_tree); | |
7315daa6 | 36 | static tree cxx_enum_underlying_base_type (const_tree); |
37fa72e9 | 37 | |
11bb4b27 ZL |
38 | /* Lang hooks common to C++ and ObjC++ are declared in cp/cp-objcp-common.h; |
39 | consequently, there should be very few hooks below. */ | |
40 | ||
3ac88239 NB |
41 | #undef LANG_HOOKS_NAME |
42 | #define LANG_HOOKS_NAME "GNU C++" | |
19551f29 AO |
43 | #undef LANG_HOOKS_INIT |
44 | #define LANG_HOOKS_INIT cxx_init | |
394d9fe7 AO |
45 | #undef LANG_HOOKS_CLASSIFY_RECORD |
46 | #define LANG_HOOKS_CLASSIFY_RECORD cp_classify_record | |
39ef6592 LC |
47 | #undef LANG_HOOKS_GENERIC_TYPE_P |
48 | #define LANG_HOOKS_GENERIC_TYPE_P class_tmpl_impl_spec_p | |
f9329c35 DS |
49 | |
50 | #undef LANG_HOOKS_GET_INNERMOST_GENERIC_PARMS | |
51 | #define LANG_HOOKS_GET_INNERMOST_GENERIC_PARMS \ | |
52 | get_primary_template_innermost_parameters | |
53 | #undef LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS | |
54 | #define LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS \ | |
f8fb7295 | 55 | get_template_innermost_arguments_folded |
d40a19da DS |
56 | #undef LANG_HOOKS_FUNCTION_PARAMETER_PACK_P |
57 | #define LANG_HOOKS_FUNCTION_PARAMETER_PACK_P \ | |
58 | function_parameter_pack_p | |
f9329c35 DS |
59 | #undef LANG_HOOKS_GET_ARGUMENT_PACK_ELEMS |
60 | #define LANG_HOOKS_GET_ARGUMENT_PACK_ELEMS \ | |
f8fb7295 | 61 | get_template_argument_pack_elems_folded |
f9329c35 DS |
62 | #undef LANG_HOOKS_GENERIC_GENERIC_PARAMETER_DECL_P |
63 | #define LANG_HOOKS_GENERIC_GENERIC_PARAMETER_DECL_P \ | |
64 | template_template_parameter_p | |
d40a19da DS |
65 | #undef LANG_HOOKS_FUNCTION_PARM_EXPANDED_FROM_PACK_P |
66 | #define LANG_HOOKS_FUNCTION_PARM_EXPANDED_FROM_PACK_P \ | |
67 | function_parameter_expanded_from_pack_p | |
68 | #undef LANG_HOOKS_GET_GENERIC_FUNCTION_DECL | |
69 | #define LANG_HOOKS_GET_GENERIC_FUNCTION_DECL get_function_template_decl | |
a0ad3539 MM |
70 | #undef LANG_HOOKS_DWARF_NAME |
71 | #define LANG_HOOKS_DWARF_NAME cxx_dwarf_name | |
820cc88f | 72 | #undef LANG_HOOKS_INIT_TS |
ee336e84 | 73 | #define LANG_HOOKS_INIT_TS cp_common_init_ts |
f9417da1 RG |
74 | #undef LANG_HOOKS_EH_PERSONALITY |
75 | #define LANG_HOOKS_EH_PERSONALITY cp_eh_personality | |
76 | #undef LANG_HOOKS_EH_RUNTIME_TYPE | |
77 | #define LANG_HOOKS_EH_RUNTIME_TYPE build_eh_type_type | |
7315daa6 MW |
78 | #undef LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE |
79 | #define LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE cxx_enum_underlying_base_type | |
f1e639b1 | 80 | |
b6f43128 DM |
81 | #if CHECKING_P |
82 | #undef LANG_HOOKS_RUN_LANG_SELFTESTS | |
83 | #define LANG_HOOKS_RUN_LANG_SELFTESTS selftest::run_cp_tests | |
84 | #endif /* #if CHECKING_P */ | |
85 | ||
0d48e877 DM |
86 | #undef LANG_HOOKS_GET_SUBSTRING_LOCATION |
87 | #define LANG_HOOKS_GET_SUBSTRING_LOCATION c_get_substring_location | |
88 | ||
11bb4b27 | 89 | /* Each front end provides its own lang hook initializer. */ |
4537ec0c | 90 | struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER; |
8ac61af7 | 91 | |
11bb4b27 ZL |
92 | /* Lang hook routines common to C++ and ObjC++ appear in cp/cp-objcp-common.c; |
93 | there should be very few routines below. */ | |
8bcefb43 | 94 | |
11bb4b27 | 95 | /* The following function does something real, but only in Objective-C++. */ |
e1a4dd13 | 96 | |
11bb4b27 | 97 | tree |
12308bc6 PC |
98 | objcp_tsubst_copy_and_build (tree /*t*/, |
99 | tree /*args*/, | |
100 | tsubst_flags_t /*complain*/, | |
101 | tree /*in_decl*/, | |
102 | bool /*function_p*/) | |
f75fbaf7 | 103 | { |
11bb4b27 | 104 | return NULL_TREE; |
f75fbaf7 ZW |
105 | } |
106 | ||
a0ad3539 MM |
107 | static const char * |
108 | cxx_dwarf_name (tree t, int verbosity) | |
109 | { | |
110 | gcc_assert (DECL_P (t)); | |
111 | ||
bde2d108 | 112 | if (DECL_NAME (t) |
ee47f74e | 113 | && (anon_aggrname_p (DECL_NAME (t)) || LAMBDA_TYPE_P (t))) |
bde2d108 | 114 | return NULL; |
a0ad3539 | 115 | if (verbosity >= 2) |
7496cd5b SA |
116 | return decl_as_dwarf_string (t, |
117 | TFF_DECL_SPECIFIERS | TFF_UNQUALIFIED_NAME | |
118 | | TFF_NO_OMIT_DEFAULT_TEMPLATE_ARGUMENTS); | |
a0ad3539 | 119 | |
7496cd5b | 120 | return lang_decl_dwarf_name (t, verbosity, false); |
a0ad3539 MM |
121 | } |
122 | ||
394d9fe7 AO |
123 | static enum classify_record |
124 | cp_classify_record (tree type) | |
125 | { | |
cc059bdd JM |
126 | if (TYPE_LANG_SPECIFIC (type) |
127 | && CLASSTYPE_DECLARED_CLASS (type)) | |
394d9fe7 AO |
128 | return RECORD_IS_CLASS; |
129 | ||
130 | return RECORD_IS_STRUCT; | |
131 | } | |
132 | ||
f9417da1 RG |
133 | static GTY(()) tree cp_eh_personality_decl; |
134 | ||
135 | static tree | |
136 | cp_eh_personality (void) | |
137 | { | |
138 | if (!cp_eh_personality_decl) | |
bfecd57c | 139 | cp_eh_personality_decl = build_personality_function ("gxx"); |
f9417da1 RG |
140 | |
141 | return cp_eh_personality_decl; | |
142 | } | |
143 | ||
f8fb7295 DS |
144 | /* This is a subroutine of fold_cplus_constants. It returns TRUE if T |
145 | is a C++ specific constant that needs to be folded further before | |
146 | being passed to the debug info emitter. */ | |
147 | ||
148 | static bool | |
149 | template_arg_needs_folding (const_tree t) | |
150 | { | |
151 | /* For now only PTRMEM_CST nodes are to be folded further. */ | |
152 | if (TREE_CODE (t) == PTRMEM_CST) | |
153 | return true; | |
154 | return false; | |
155 | } | |
156 | ||
157 | /* Fold the elements of the TREE_VEC C which are C++ specific nodes | |
158 | that would need folding so that they can be processed by the debug | |
159 | info emitter. This is a subroutine of | |
160 | get_template_innermost_arguments_folded and | |
161 | get_template_argument_pack_elems_folded. */ | |
162 | ||
163 | static tree | |
164 | fold_cplus_constants (const_tree c) | |
165 | { | |
166 | tree folded_elems, elems = CONST_CAST_TREE (c); | |
167 | int vec_len, i; | |
168 | ||
169 | if (elems == NULL_TREE || elems == error_mark_node) | |
170 | return elems; | |
171 | ||
172 | vec_len = TREE_VEC_LENGTH (elems); | |
173 | ||
174 | /* First check if there is at least one element that needs | |
175 | folding. If there is none, we just return ELEMS. Otherwise create | |
176 | and return a new tree vector that contains the folded versions of | |
177 | ELEMS. This is to avoid allocating memory if we don't need | |
178 | to. */ | |
179 | for (i = 0; i < vec_len; ++i) | |
180 | { | |
181 | if (template_arg_needs_folding (TREE_VEC_ELT (elems, i))) | |
182 | break; | |
183 | } | |
184 | if (i == vec_len) | |
185 | return elems; | |
186 | ||
187 | folded_elems = make_tree_vec (vec_len); | |
188 | for (i = 0; i < vec_len; ++i) | |
189 | { | |
190 | tree elem = TREE_VEC_ELT (elems, i); | |
191 | TREE_VEC_ELT (folded_elems, i) = | |
192 | (elem && !TYPE_P (elem)) ? cplus_expand_constant (elem) : elem; | |
193 | ||
194 | } | |
195 | return folded_elems; | |
196 | } | |
197 | ||
198 | /* The C++ implementation of the LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS | |
199 | hook. It returns the innermost template arguments of type T, and | |
200 | makes sure those arguments are folded enough for the debug info | |
201 | emitter. */ | |
202 | ||
203 | static tree | |
204 | get_template_innermost_arguments_folded (const_tree t) | |
205 | { | |
206 | return fold_cplus_constants (get_template_innermost_arguments (t)); | |
207 | } | |
208 | ||
209 | static tree | |
210 | get_template_argument_pack_elems_folded (const_tree t) | |
211 | { | |
212 | return fold_cplus_constants (get_template_argument_pack_elems (t)); | |
213 | } | |
214 | ||
7315daa6 MW |
215 | /* The C++ version of the enum_underlying_base_type langhook. |
216 | See also cp/semantics.c (finish_underlying_type). */ | |
217 | ||
218 | static | |
219 | tree cxx_enum_underlying_base_type (const_tree type) | |
220 | { | |
221 | tree underlying_type = ENUM_UNDERLYING_TYPE (type); | |
222 | ||
223 | if (! ENUM_FIXED_UNDERLYING_TYPE_P (type)) | |
224 | underlying_type | |
225 | = c_common_type_for_mode (TYPE_MODE (underlying_type), | |
226 | TYPE_UNSIGNED (underlying_type)); | |
227 | ||
228 | return underlying_type; | |
229 | } | |
230 | ||
b6f43128 DM |
231 | #if CHECKING_P |
232 | ||
233 | namespace selftest { | |
234 | ||
235 | /* Implementation of LANG_HOOKS_RUN_LANG_SELFTESTS for the C++ frontend. */ | |
236 | ||
237 | void | |
238 | run_cp_tests (void) | |
239 | { | |
240 | /* Run selftests shared within the C family. */ | |
241 | c_family_tests (); | |
242 | ||
243 | /* Additional C++-specific tests. */ | |
9a004410 DM |
244 | cp_pt_c_tests (); |
245 | cp_tree_c_tests (); | |
b6f43128 DM |
246 | } |
247 | ||
248 | } // namespace selftest | |
249 | ||
250 | #endif /* #if CHECKING_P */ | |
251 | ||
641da50a | 252 | |
6561cdf6 | 253 | #include "gt-cp-cp-lang.h" |
11bb4b27 | 254 | #include "gtype-cp.h" |