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19551f29 | 1 | /* Language-dependent hooks for C++. |
cbe34bb5 | 2 | Copyright (C) 2001-2017 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; |
820cc88f | 31 | static void cp_init_ts (void); |
a0ad3539 | 32 | static const char * cxx_dwarf_name (tree t, int verbosity); |
394d9fe7 | 33 | static enum classify_record cp_classify_record (tree type); |
f9417da1 | 34 | static tree cp_eh_personality (void); |
f8fb7295 DS |
35 | static tree get_template_innermost_arguments_folded (const_tree); |
36 | static tree get_template_argument_pack_elems_folded (const_tree); | |
7315daa6 | 37 | static tree cxx_enum_underlying_base_type (const_tree); |
37fa72e9 | 38 | |
11bb4b27 ZL |
39 | /* Lang hooks common to C++ and ObjC++ are declared in cp/cp-objcp-common.h; |
40 | consequently, there should be very few hooks below. */ | |
41 | ||
3ac88239 NB |
42 | #undef LANG_HOOKS_NAME |
43 | #define LANG_HOOKS_NAME "GNU C++" | |
19551f29 AO |
44 | #undef LANG_HOOKS_INIT |
45 | #define LANG_HOOKS_INIT cxx_init | |
394d9fe7 AO |
46 | #undef LANG_HOOKS_CLASSIFY_RECORD |
47 | #define LANG_HOOKS_CLASSIFY_RECORD cp_classify_record | |
39ef6592 LC |
48 | #undef LANG_HOOKS_GENERIC_TYPE_P |
49 | #define LANG_HOOKS_GENERIC_TYPE_P class_tmpl_impl_spec_p | |
f9329c35 DS |
50 | |
51 | #undef LANG_HOOKS_GET_INNERMOST_GENERIC_PARMS | |
52 | #define LANG_HOOKS_GET_INNERMOST_GENERIC_PARMS \ | |
53 | get_primary_template_innermost_parameters | |
54 | #undef LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS | |
55 | #define LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS \ | |
f8fb7295 | 56 | get_template_innermost_arguments_folded |
d40a19da DS |
57 | #undef LANG_HOOKS_FUNCTION_PARAMETER_PACK_P |
58 | #define LANG_HOOKS_FUNCTION_PARAMETER_PACK_P \ | |
59 | function_parameter_pack_p | |
f9329c35 DS |
60 | #undef LANG_HOOKS_GET_ARGUMENT_PACK_ELEMS |
61 | #define LANG_HOOKS_GET_ARGUMENT_PACK_ELEMS \ | |
f8fb7295 | 62 | get_template_argument_pack_elems_folded |
f9329c35 DS |
63 | #undef LANG_HOOKS_GENERIC_GENERIC_PARAMETER_DECL_P |
64 | #define LANG_HOOKS_GENERIC_GENERIC_PARAMETER_DECL_P \ | |
65 | template_template_parameter_p | |
d40a19da DS |
66 | #undef LANG_HOOKS_FUNCTION_PARM_EXPANDED_FROM_PACK_P |
67 | #define LANG_HOOKS_FUNCTION_PARM_EXPANDED_FROM_PACK_P \ | |
68 | function_parameter_expanded_from_pack_p | |
69 | #undef LANG_HOOKS_GET_GENERIC_FUNCTION_DECL | |
70 | #define LANG_HOOKS_GET_GENERIC_FUNCTION_DECL get_function_template_decl | |
a0ad3539 MM |
71 | #undef LANG_HOOKS_DWARF_NAME |
72 | #define LANG_HOOKS_DWARF_NAME cxx_dwarf_name | |
820cc88f DB |
73 | #undef LANG_HOOKS_INIT_TS |
74 | #define LANG_HOOKS_INIT_TS cp_init_ts | |
f9417da1 RG |
75 | #undef LANG_HOOKS_EH_PERSONALITY |
76 | #define LANG_HOOKS_EH_PERSONALITY cp_eh_personality | |
77 | #undef LANG_HOOKS_EH_RUNTIME_TYPE | |
78 | #define LANG_HOOKS_EH_RUNTIME_TYPE build_eh_type_type | |
7315daa6 MW |
79 | #undef LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE |
80 | #define LANG_HOOKS_ENUM_UNDERLYING_BASE_TYPE cxx_enum_underlying_base_type | |
f1e639b1 | 81 | |
11bb4b27 | 82 | /* Each front end provides its own lang hook initializer. */ |
4537ec0c | 83 | struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER; |
8ac61af7 | 84 | |
11bb4b27 ZL |
85 | /* Lang hook routines common to C++ and ObjC++ appear in cp/cp-objcp-common.c; |
86 | there should be very few routines below. */ | |
8bcefb43 | 87 | |
11bb4b27 | 88 | /* The following function does something real, but only in Objective-C++. */ |
e1a4dd13 | 89 | |
11bb4b27 | 90 | tree |
12308bc6 PC |
91 | objcp_tsubst_copy_and_build (tree /*t*/, |
92 | tree /*args*/, | |
93 | tsubst_flags_t /*complain*/, | |
94 | tree /*in_decl*/, | |
95 | bool /*function_p*/) | |
f75fbaf7 | 96 | { |
11bb4b27 | 97 | return NULL_TREE; |
f75fbaf7 ZW |
98 | } |
99 | ||
820cc88f DB |
100 | static void |
101 | cp_init_ts (void) | |
102 | { | |
81f653d6 | 103 | cp_common_init_ts (); |
820cc88f | 104 | |
3ed8593d | 105 | init_shadowed_var_for_decl (); |
820cc88f DB |
106 | } |
107 | ||
a0ad3539 MM |
108 | static const char * |
109 | cxx_dwarf_name (tree t, int verbosity) | |
110 | { | |
111 | gcc_assert (DECL_P (t)); | |
112 | ||
bde2d108 | 113 | if (DECL_NAME (t) |
ee47f74e | 114 | && (anon_aggrname_p (DECL_NAME (t)) || LAMBDA_TYPE_P (t))) |
bde2d108 | 115 | return NULL; |
a0ad3539 | 116 | if (verbosity >= 2) |
7496cd5b SA |
117 | return decl_as_dwarf_string (t, |
118 | TFF_DECL_SPECIFIERS | TFF_UNQUALIFIED_NAME | |
119 | | TFF_NO_OMIT_DEFAULT_TEMPLATE_ARGUMENTS); | |
a0ad3539 | 120 | |
7496cd5b | 121 | return lang_decl_dwarf_name (t, verbosity, false); |
a0ad3539 MM |
122 | } |
123 | ||
394d9fe7 AO |
124 | static enum classify_record |
125 | cp_classify_record (tree type) | |
126 | { | |
cc059bdd JM |
127 | if (TYPE_LANG_SPECIFIC (type) |
128 | && CLASSTYPE_DECLARED_CLASS (type)) | |
394d9fe7 AO |
129 | return RECORD_IS_CLASS; |
130 | ||
131 | return RECORD_IS_STRUCT; | |
132 | } | |
133 | ||
f9417da1 RG |
134 | static GTY(()) tree cp_eh_personality_decl; |
135 | ||
136 | static tree | |
137 | cp_eh_personality (void) | |
138 | { | |
139 | if (!cp_eh_personality_decl) | |
bfecd57c | 140 | cp_eh_personality_decl = build_personality_function ("gxx"); |
f9417da1 RG |
141 | |
142 | return cp_eh_personality_decl; | |
143 | } | |
144 | ||
f8fb7295 DS |
145 | /* This is a subroutine of fold_cplus_constants. It returns TRUE if T |
146 | is a C++ specific constant that needs to be folded further before | |
147 | being passed to the debug info emitter. */ | |
148 | ||
149 | static bool | |
150 | template_arg_needs_folding (const_tree t) | |
151 | { | |
152 | /* For now only PTRMEM_CST nodes are to be folded further. */ | |
153 | if (TREE_CODE (t) == PTRMEM_CST) | |
154 | return true; | |
155 | return false; | |
156 | } | |
157 | ||
158 | /* Fold the elements of the TREE_VEC C which are C++ specific nodes | |
159 | that would need folding so that they can be processed by the debug | |
160 | info emitter. This is a subroutine of | |
161 | get_template_innermost_arguments_folded and | |
162 | get_template_argument_pack_elems_folded. */ | |
163 | ||
164 | static tree | |
165 | fold_cplus_constants (const_tree c) | |
166 | { | |
167 | tree folded_elems, elems = CONST_CAST_TREE (c); | |
168 | int vec_len, i; | |
169 | ||
170 | if (elems == NULL_TREE || elems == error_mark_node) | |
171 | return elems; | |
172 | ||
173 | vec_len = TREE_VEC_LENGTH (elems); | |
174 | ||
175 | /* First check if there is at least one element that needs | |
176 | folding. If there is none, we just return ELEMS. Otherwise create | |
177 | and return a new tree vector that contains the folded versions of | |
178 | ELEMS. This is to avoid allocating memory if we don't need | |
179 | to. */ | |
180 | for (i = 0; i < vec_len; ++i) | |
181 | { | |
182 | if (template_arg_needs_folding (TREE_VEC_ELT (elems, i))) | |
183 | break; | |
184 | } | |
185 | if (i == vec_len) | |
186 | return elems; | |
187 | ||
188 | folded_elems = make_tree_vec (vec_len); | |
189 | for (i = 0; i < vec_len; ++i) | |
190 | { | |
191 | tree elem = TREE_VEC_ELT (elems, i); | |
192 | TREE_VEC_ELT (folded_elems, i) = | |
193 | (elem && !TYPE_P (elem)) ? cplus_expand_constant (elem) : elem; | |
194 | ||
195 | } | |
196 | return folded_elems; | |
197 | } | |
198 | ||
199 | /* The C++ implementation of the LANG_HOOKS_GET_INNERMOST_GENERIC_ARGS | |
200 | hook. It returns the innermost template arguments of type T, and | |
201 | makes sure those arguments are folded enough for the debug info | |
202 | emitter. */ | |
203 | ||
204 | static tree | |
205 | get_template_innermost_arguments_folded (const_tree t) | |
206 | { | |
207 | return fold_cplus_constants (get_template_innermost_arguments (t)); | |
208 | } | |
209 | ||
210 | static tree | |
211 | get_template_argument_pack_elems_folded (const_tree t) | |
212 | { | |
213 | return fold_cplus_constants (get_template_argument_pack_elems (t)); | |
214 | } | |
215 | ||
7315daa6 MW |
216 | /* The C++ version of the enum_underlying_base_type langhook. |
217 | See also cp/semantics.c (finish_underlying_type). */ | |
218 | ||
219 | static | |
220 | tree cxx_enum_underlying_base_type (const_tree type) | |
221 | { | |
222 | tree underlying_type = ENUM_UNDERLYING_TYPE (type); | |
223 | ||
224 | if (! ENUM_FIXED_UNDERLYING_TYPE_P (type)) | |
225 | underlying_type | |
226 | = c_common_type_for_mode (TYPE_MODE (underlying_type), | |
227 | TYPE_UNSIGNED (underlying_type)); | |
228 | ||
229 | return underlying_type; | |
230 | } | |
231 | ||
641da50a | 232 | |
6561cdf6 | 233 | #include "gt-cp-cp-lang.h" |
11bb4b27 | 234 | #include "gtype-cp.h" |