4 * Basic symbol and namespace definitions.
6 * Copyright (C) 2003 Transmeta Corp.
9 * Licensed under the Open Software License version 1.1
15 * An identifier with semantic meaning is a "symbol".
17 * There's a 1:n relationship: each symbol is always
18 * associated with one identifier, while each identifier
19 * can have one or more semantic meanings due to C scope
22 * The progression is symbol -> token -> identifier. The
23 * token contains the information on where the symbol was
30 NS_STRUCT
= 4, // Also used for unions and enums.
35 NS_INVISIBLEMACRO
= 128,
60 struct expression
*context
;
64 extern struct context
*alloc_context(void);
66 DECLARE_PTR_LIST(context_list
, struct context
);
69 unsigned long modifiers
;
70 unsigned long alignment
;
71 struct context_list
*contexts
;
73 struct symbol
*base_type
;
77 int (*evaluate
)(struct expression
*);
78 int (*expand
)(struct expression
*, int);
79 int (*args
)(struct expression
*);
82 extern int expand_safe_p(struct expression
*expr
, int cost
);
83 extern int expand_constant_p(struct expression
*expr
, int cost
);
86 enum namespace namespace:8;
88 unsigned char used
:1, weak
:1;
89 struct position pos
; /* Where this symbol was declared */
90 struct ident
*ident
; /* What identifier this symbol is associated with */
91 struct symbol
*next_id
; /* Next semantic symbol that shares this identifier */
92 struct symbol
**id_list
; /* Backpointer to symbol list head */
93 struct symbol
*replace
; /* What is this symbol shadowed by in copy-expression */
95 struct symbol
*same_symbol
;
99 struct /* NS_MACRO */ {
100 struct token
*expansion
;
101 struct token
*arglist
;
103 struct /* NS_PREPROCESSOR */ {
104 int (*handler
)(struct stream
*, struct token
**, struct token
*);
107 struct /* NS_SYMBOL */ {
108 unsigned long offset
;
110 unsigned int bit_offset
:8,
117 struct expression
*array_size
;
119 struct symbol_list
*arguments
;
120 struct statement
*stmt
;
121 struct symbol_list
*symbol_list
;
122 struct statement
*inline_stmt
;
123 struct symbol_list
*inline_symbol_list
;
124 struct expression
*initializer
;
125 long long value
; /* Initial value */
128 union /* backend */ {
129 struct basic_block
*bb_target
; /* label */
130 void *aux
; /* Auxiliary info, eg. backend information */
136 #define MOD_AUTO 0x0001
137 #define MOD_REGISTER 0x0002
138 #define MOD_STATIC 0x0004
139 #define MOD_EXTERN 0x0008
141 #define MOD_CONST 0x0010
142 #define MOD_VOLATILE 0x0020
143 #define MOD_SIGNED 0x0040
144 #define MOD_UNSIGNED 0x0080
146 #define MOD_CHAR 0x0100
147 #define MOD_SHORT 0x0200
148 #define MOD_LONG 0x0400
149 #define MOD_LONGLONG 0x0800
151 #define MOD_TYPEDEF 0x1000
152 #define MOD_STRUCTOF 0x2000
153 #define MOD_UNIONOF 0x4000
154 #define MOD_ENUMOF 0x8000
156 #define MOD_TYPEOF 0x10000
157 #define MOD_ATTRIBUTE 0x20000
158 #define MOD_INLINE 0x40000
159 #define MOD_ADDRESSABLE 0x80000
161 #define MOD_NOCAST 0x100000
162 #define MOD_NODEREF 0x200000
163 #define MOD_ACCESSED 0x400000
164 #define MOD_TOPLEVEL 0x800000 // scoping..
166 #define MOD_LABEL 0x1000000
167 #define MOD_ASSIGNED 0x2000000
168 #define MOD_TYPE 0x4000000
169 #define MOD_SAFE 0x8000000 // non-null/non-trapping pointer
171 #define MOD_USERTYPE 0x10000000
172 #define MOD_FORCE 0x20000000
173 #define MOD_EXPLICITLY_SIGNED 0x40000000
174 #define MOD_BITWISE 0x80000000
176 #define MOD_NONLOCAL (MOD_EXTERN | MOD_TOPLEVEL)
177 #define MOD_STORAGE (MOD_AUTO | MOD_REGISTER | MOD_STATIC | MOD_EXTERN | MOD_INLINE | MOD_TOPLEVEL)
178 #define MOD_SPECIALBITS (MOD_STRUCTOF | MOD_UNIONOF | MOD_ENUMOF | MOD_ATTRIBUTE | MOD_TYPEOF)
179 #define MOD_SIGNEDNESS (MOD_SIGNED | MOD_UNSIGNED | MOD_EXPLICITLY_SIGNED)
180 #define MOD_SPECIFIER (MOD_CHAR | MOD_SHORT | MOD_LONG | MOD_LONGLONG | MOD_SIGNEDNESS)
181 #define MOD_SIZE (MOD_CHAR | MOD_SHORT | MOD_LONG | MOD_LONGLONG)
182 #define MOD_IGNORE (MOD_TOPLEVEL | MOD_STORAGE | MOD_ADDRESSABLE | \
183 MOD_ASSIGNED | MOD_USERTYPE | MOD_FORCE | MOD_ACCESSED | MOD_EXPLICITLY_SIGNED)
186 /* Current parsing/evaluation function */
187 extern struct symbol
*current_fn
;
190 extern struct symbol int_type
,
194 extern struct symbol bool_ctype
, void_ctype
, type_ctype
,
195 char_ctype
, schar_ctype
, uchar_ctype
,
196 short_ctype
, sshort_ctype
, ushort_ctype
,
197 int_ctype
, sint_ctype
, uint_ctype
,
198 long_ctype
, slong_ctype
, ulong_ctype
,
199 llong_ctype
, sllong_ctype
, ullong_ctype
,
200 float_ctype
, double_ctype
, ldouble_ctype
,
201 string_ctype
, ptr_ctype
, lazy_ptr_ctype
,
202 incomplete_ctype
, label_ctype
, bad_ctype
;
204 /* Special internal symbols */
205 extern struct symbol zero_int
;
207 #define __IDENT(n,str,res) \
208 extern struct ident n
209 #include "ident-list.h"
211 #define symbol_is_typename(sym) ((sym)->type == SYM_TYPE)
213 extern struct symbol_list
*translation_unit_used_list
;
215 extern void access_symbol(struct symbol
*);
217 extern const char * type_difference(struct symbol
*target
, struct symbol
*source
,
218 unsigned long target_mod_ignore
, unsigned long source_mod_ignore
);
220 extern struct symbol
*lookup_symbol(struct ident
*, enum namespace);
221 extern struct symbol
*create_symbol(int stream
, const char *name
, int type
, int namespace);
222 extern void init_symbols(void);
223 extern void init_ctype(void);
224 extern struct symbol
*alloc_symbol(struct position
, int type
);
225 extern void show_type(struct symbol
*);
226 extern const char *modifier_string(unsigned long mod
);
227 extern void show_symbol(struct symbol
*);
228 extern int show_symbol_expr_init(struct symbol
*sym
);
229 extern void show_type_list(struct symbol
*);
230 extern void show_symbol_list(struct symbol_list
*, const char *);
231 extern void add_symbol(struct symbol_list
**, struct symbol
*);
232 extern void bind_symbol(struct symbol
*, struct ident
*, enum namespace);
234 extern struct symbol
*examine_symbol_type(struct symbol
*);
235 extern void examine_simple_symbol_type(struct symbol
*);
236 extern const char *show_typename(struct symbol
*sym
);
238 extern void debug_symbol(struct symbol
*);
239 extern void merge_type(struct symbol
*sym
, struct symbol
*base_type
);
240 extern void check_declaration(struct symbol
*sym
);
242 static inline struct symbol
*get_base_type(const struct symbol
*sym
)
244 return examine_symbol_type(sym
->ctype
.base_type
);
247 static inline int is_int_type(const struct symbol
*type
)
249 if (type
->type
== SYM_NODE
)
250 type
= type
->ctype
.base_type
;
251 if (type
->type
== SYM_ENUM
)
252 type
= type
->ctype
.base_type
;
253 return type
->type
== SYM_BITFIELD
||
254 type
->ctype
.base_type
== &int_type
;
257 static inline int is_enum_type(const struct symbol
*type
)
259 if (type
->type
== SYM_NODE
)
260 type
= type
->ctype
.base_type
;
261 return (type
->type
== SYM_ENUM
);
264 static inline int get_sym_type(struct symbol
*type
)
266 if (type
->type
== SYM_NODE
)
267 type
= type
->ctype
.base_type
;
268 if (type
->type
== SYM_ENUM
)
269 type
= type
->ctype
.base_type
;
273 #define is_restricted_type(type) (get_sym_type(type) == SYM_RESTRICT)
274 #define is_fouled_type(type) (get_sym_type(type) == SYM_FOULED)
275 #define is_bitfield_type(type) (get_sym_type(type) == SYM_BITFIELD)
276 extern int is_ptr_type(struct symbol
*);
278 void create_fouled(struct symbol
*type
);
279 struct symbol
*befoul(struct symbol
*type
);
281 #endif /* SYMBOL_H */