1 /*10 2002/03/19 13:08:33
2 * Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
5 * Authors: Martin Trapp, Christian Schaefer,
8 * entity.h: entities represent all program known objects.
10 * An entity is the representation of program known objects in Firm.
11 * The primary concept of entities is to represent members of complex
12 * types, i.e., fields and methods of classes. As not all programming
13 * language model all variables and methods as members of some class,
14 * the concept of entities is extended to cover also local and global
15 * variables, and arbitrary procedures.
17 * An entity always specifies the type of the object it represents and
18 * the type of the object it is a part of, the owner of the entity.
19 * Originally this is the type of the class of which the entity is a
21 * The owner of local variables is the procedure they are defined in.
22 * The owner of global variables and procedures visible in the whole
23 * program is a universally defined class type "GlobalType". The owner
24 * of procedures defined in the scope of an other procedure is the
25 * enclosing procedure.
38 ident *name; /* name of this entity */
39 ident *ld_name; /* Unique name of this entity, i.e., the mangled
40 name. E.g., for a class `A' with field `a' this
41 is the ident for `A_a'. */
42 type *type; /* The type of this entity, e.g., a method type, a
43 basic type of the language or a class itself */
44 type *owner; /* The class this entity belongs to. In case of local
45 variables the method they are defined in. */
46 entity **overwrites; /* A list of entities this entity overwrites. */
47 entity **overwrittenby; /* A list of entities that overwrite this entity. */
48 ent_allocation allocation; /* Distinguishes static and dynamically allocated
50 ent_visibility visibility; /* Specifies visibility to external program
52 ent_variability variability; /* Specifies variability of entities content */
53 ent_volatility volatility; /* Specifies volatility of entities content */
54 ir_node *value; /* value of atomic entity */
55 ir_node **values; /* values of compound entities */
56 entity **val_ents; /* entities corresponding to constant values */
57 int offset; /* Offset in byte for this entity. Fixed when layout
58 of owner is determined. */
59 void *link; /* To store some intermediate information */
60 unsigned long visit; /* visited counter for walks of the type information */
62 enum peculiarity peculiarity;
63 ir_graph *irg; /* If (type == method_type) this is the corresponding irg.
64 The ir_graph constructor automatically sets this field.
65 Yes, it must be here. */
66 struct dbg_info* dbi; /* A pointer to information for debug support. */
70 # endif /* _ENTITY_T_H_ */