1 /* Language-dependent hooks for C++.
2 Copyright 2001 Free Software Foundation, Inc.
3 Contributed by Alexandre Oliva <aoliva@redhat.com>
5 This file is part of GNU CC.
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)
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.
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. */
28 #include "langhooks.h"
29 #include "langhooks-def.h"
31 static HOST_WIDE_INT cxx_get_alias_set PARAMS ((tree));
32 static bool ok_to_generate_alias_set_for_type PARAMS ((tree));
34 #undef LANG_HOOKS_NAME
35 #define LANG_HOOKS_NAME "GNU C++"
36 #undef LANG_HOOKS_INIT
37 #define LANG_HOOKS_INIT cxx_init
38 #undef LANG_HOOKS_FINISH
39 #define LANG_HOOKS_FINISH cxx_finish
40 #undef LANG_HOOKS_CLEAR_BINDING_STACK
41 #define LANG_HOOKS_CLEAR_BINDING_STACK pop_everything
42 #undef LANG_HOOKS_INIT_OPTIONS
43 #define LANG_HOOKS_INIT_OPTIONS cxx_init_options
44 #undef LANG_HOOKS_DECODE_OPTION
45 #define LANG_HOOKS_DECODE_OPTION cxx_decode_option
46 #undef LANG_HOOKS_POST_OPTIONS
47 #define LANG_HOOKS_POST_OPTIONS cxx_post_options
48 #undef LANG_HOOKS_GET_ALIAS_SET
49 #define LANG_HOOKS_GET_ALIAS_SET cxx_get_alias_set
50 #undef LANG_HOOKS_EXPAND_CONSTANT
51 #define LANG_HOOKS_EXPAND_CONSTANT cplus_expand_constant
52 #undef LANG_HOOKS_SAFE_FROM_P
53 #define LANG_HOOKS_SAFE_FROM_P c_safe_from_p
54 #undef LANG_HOOKS_PARSE_FILE
55 #define LANG_HOOKS_PARSE_FILE c_common_parse_file
56 #undef LANG_HOOKS_DUP_LANG_SPECIFIC_DECL
57 #define LANG_HOOKS_DUP_LANG_SPECIFIC_DECL cxx_dup_lang_specific_decl
58 #undef LANG_HOOKS_UNSAVE_EXPR_NOW
59 #define LANG_HOOKS_UNSAVE_EXPR_NOW cxx_unsave_expr_now
60 #undef LANG_HOOKS_PRINT_STATISTICS
61 #define LANG_HOOKS_PRINT_STATISTICS cxx_print_statistics
62 #undef LANG_HOOKS_PRINT_XNODE
63 #define LANG_HOOKS_PRINT_XNODE cxx_print_xnode
64 #undef LANG_HOOKS_PRINT_DECL
65 #define LANG_HOOKS_PRINT_DECL cxx_print_decl
66 #undef LANG_HOOKS_PRINT_TYPE
67 #define LANG_HOOKS_PRINT_TYPE cxx_print_type
68 #undef LANG_HOOKS_PRINT_IDENTIFIER
69 #define LANG_HOOKS_PRINT_IDENTIFIER cxx_print_identifier
70 #undef LANG_HOOKS_DECL_PRINTABLE_NAME
71 #define LANG_HOOKS_DECL_PRINTABLE_NAME cxx_printable_name
72 #undef LANG_HOOKS_SET_YYDEBUG
73 #define LANG_HOOKS_SET_YYDEBUG cxx_set_yydebug
75 #undef LANG_HOOKS_TREE_INLINING_WALK_SUBTREES
76 #define LANG_HOOKS_TREE_INLINING_WALK_SUBTREES \
78 #undef LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN
79 #define LANG_HOOKS_TREE_INLINING_CANNOT_INLINE_TREE_FN \
80 cp_cannot_inline_tree_fn
81 #undef LANG_HOOKS_TREE_INLINING_ADD_PENDING_FN_DECLS
82 #define LANG_HOOKS_TREE_INLINING_ADD_PENDING_FN_DECLS \
83 cp_add_pending_fn_decls
84 #undef LANG_HOOKS_TREE_INLINING_TREE_CHAIN_MATTERS_P
85 #define LANG_HOOKS_TREE_INLINING_TREE_CHAIN_MATTERS_P \
87 #undef LANG_HOOKS_TREE_INLINING_AUTO_VAR_IN_FN_P
88 #define LANG_HOOKS_TREE_INLINING_AUTO_VAR_IN_FN_P \
90 #undef LANG_HOOKS_TREE_INLINING_COPY_RES_DECL_FOR_INLINING
91 #define LANG_HOOKS_TREE_INLINING_COPY_RES_DECL_FOR_INLINING \
92 cp_copy_res_decl_for_inlining
93 #undef LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P
94 #define LANG_HOOKS_TREE_INLINING_ANON_AGGR_TYPE_P anon_aggr_type_p
95 #undef LANG_HOOKS_TREE_INLINING_START_INLINING
96 #define LANG_HOOKS_TREE_INLINING_START_INLINING cp_start_inlining
97 #undef LANG_HOOKS_TREE_INLINING_END_INLINING
98 #define LANG_HOOKS_TREE_INLINING_END_INLINING cp_end_inlining
99 #undef LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN
100 #define LANG_HOOKS_TREE_DUMP_DUMP_TREE_FN cp_dump_tree
101 #undef LANG_HOOKS_TREE_DUMP_TYPE_QUALS_FN
102 #define LANG_HOOKS_TREE_DUMP_TYPE_QUALS_FN cp_type_quals
104 /* Each front end provides its own hooks, for toplev.c. */
105 const struct lang_hooks lang_hooks = LANG_HOOKS_INITIALIZER;
107 /* Check if a C++ type is safe for aliasing.
108 Return TRUE if T safe for aliasing FALSE otherwise. */
111 ok_to_generate_alias_set_for_type (t)
114 if (TYPE_PTRMEMFUNC_P (t))
116 if (AGGREGATE_TYPE_P (t))
118 if ((TREE_CODE (t) == RECORD_TYPE) || (TREE_CODE (t) == UNION_TYPE))
122 if (! CLASSTYPE_NON_POD_P(t))
124 /* Classes with virtual baseclasses are not. */
125 if (TYPE_USES_VIRTUAL_BASECLASSES (t))
127 /* Recursively check the base classes. */
128 if (TYPE_BINFO (t) != NULL && TYPE_BINFO_BASETYPES (t) != NULL)
131 for (i = 0; i < TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (t)); i++)
133 tree binfo = TREE_VEC_ELT (TYPE_BINFO_BASETYPES (t), i);
134 if (!ok_to_generate_alias_set_for_type (BINFO_TYPE (binfo)))
138 /* Check all the fields. */
139 for (fields = TYPE_FIELDS (t); fields; fields = TREE_CHAIN (fields))
141 if (TREE_CODE (fields) != FIELD_DECL)
143 if (! ok_to_generate_alias_set_for_type (TREE_TYPE (fields)))
148 else if (TREE_CODE (t) == ARRAY_TYPE)
149 return ok_to_generate_alias_set_for_type (TREE_TYPE (t));
151 /* This should never happen, we dealt with all the aggregate
152 types that can appear in C++ above. */
159 /* Tree code classes. */
161 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) TYPE,
163 const char tree_code_type[] = {
166 #include "c-common.def"
168 #include "cp-tree.def"
172 /* Table indexed by tree code giving number of expression
173 operands beyond the fixed part of the node structure.
174 Not used for types or decls. */
176 #define DEFTREECODE(SYM, NAME, TYPE, LENGTH) LENGTH,
178 const unsigned char tree_code_length[] = {
181 #include "c-common.def"
183 #include "cp-tree.def"
187 /* Names of tree components.
188 Used for printing out the tree and error messages. */
189 #define DEFTREECODE(SYM, NAME, TYPE, LEN) NAME,
191 const char *const tree_code_name[] = {
194 #include "c-common.def"
196 #include "cp-tree.def"
200 /* Special routine to get the alias set for C++. */
203 cxx_get_alias_set (t)
206 /* It's not yet safe to use alias sets for classes in C++. */
207 if (!ok_to_generate_alias_set_for_type(t))
210 return c_common_get_alias_set (t);