/*
-** Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
-** All rights reserved.
-**
-** Authors: Martin Trapp, Christian Schaefer,
-** Goetz Lindenmaier
-**
-** entity.h: entities represent all program known objects.
-**
-** An entity is the representation of program known objects in Firm.
-** The primary concept of entities is to represent members of complex
-** types, i.e., fields and methods of classes. As not all programming
-** language model all variables and methods as members of some class,
-** the concept of entities is extended to cover also local and global
-** variables, and arbitrary procedures.
-**
-** An entity always specifies the type of the object it represents and
-** the type of the object it is a part of, the owner of the entity.
-** Originally this is the type of the class of which the entity is a
-** member.
-** The owner of local variables is the procedure they are defined in.
-** The owner of global variables and procedures visible in the whole
-** program is a universally defined class type "GlobalType". The owner
-** of procedures defined in the scope of an other procedure is the
-** enclosing procedure.
-**
-** In detail the datastructure entity has the following fields:
-**
-** ident *name Name of this entity as specified in the source code.
-** Only unequivocal in conjuction with scope.
-** ident *ld_name Unique name of this entity, i.e., the mangled
-** name. E.g., for a class `A' with field `a' this
-** is the ident for `A_a'.
-** type *type The type of this entity, e.g., a method type, a
-** basic type of the language or a class itself.
-** type *owner; The class this entity belongs to. In case of local
-** variables the method they are defined in.
-** int offset; Offset in byte for this entity. Fixed when layout
-** of owner is determined.
-** ir_graph *irg; If (type == method_type) this is the corresponding irg.
-** The ir_graph constructor automatically sets this field.
-** If (type != method_type) access of this field will cause
-** an assertion.
+ * Project: libFIRM
+ * File name: ir/tr/entity.h
+ * Purpose: Representation of all program known entities.
+ * Author: Martin Trapp, Christian Schaefer
+ * Modified by: Goetz Lindenmaier
+ * Created:
+ * CVS-ID: $Id$
+ * Copyright: (c) 1998-2003 Universität Karlsruhe
+ * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
+ */
+
+/**
+* @file entity.h
+*
+* Entities represent all program known objects.
+*
+* @author Martin Trapp, Christian Schaefer
+* @author Goetz Lindenmaier
+*
+* An entity is the representation of program known objects in Firm.
+* The primary concept of entities is to represent members of complex
+* types, i.e., fields and methods of classes. As not all programming
+* language model all variables and methods as members of some class,
+* the concept of entities is extended to cover also local and global
+* variables, and arbitrary procedures.
+*
+* An entity always specifies the type of the object it represents and
+* the type of the object it is a part of, the owner of the entity.
+* Originally this is the type of the class of which the entity is a
+* member.
+* The owner of local variables is the procedure they are defined in.
+* The owner of global variables and procedures visible in the whole
+* program is a universally defined class type "GlobalType". The owner
+* of procedures defined in the scope of an other procedure is the
+* enclosing procedure.
+*
+* In detail the datastructure entity has the following fields:
+*
+* - ident *name: Name of this entity as specified in the source code.
+* Only unequivocal in conjuction with scope.
+* - ident *ld_name: Unique name of this entity, i.e., the mangled
+* name. E.g., for a class `A' with field `a' this
+* is the ident for `A_a'.
+* - type *type: The type of this entity, e.g., a method type, a
+* basic type of the language or a class itself.
+* - type *owner: The class this entity belongs to. In case of local
+* variables the method they are defined in.
+* - int offset: Offset in bits for this entity. Fixed when layout
+* of owner is determined.
+* - ir_graph *irg: If (type == method_type) this is the corresponding irg.
+* The ir_graph constructor automatically sets this field.
+* If (type != method_type) access of this field will cause
+* an assertion.
*/
/* $Id$ */
# include "ident.h"
# include "type.h"
+# include "dbginfo.h"
-/*******************************************************************/
-/** general **/
-/*******************************************************************/
+/*-----------------------------------------------------------------*/
+/* general */
+/*-----------------------------------------------------------------*/
-/* initalize entity module */
+/** Initalize entity module. */
void init_entity (void);
-/*******************************************************************/
-/** ENTITY **/
-/*******************************************************************/
+/*-----------------------------------------------------------------*/
+/* ENTITY */
+/*-----------------------------------------------------------------*/
+/* to resolve recursion between entity.h and irgraph.h */
#ifndef _IR_GRAPH_TYPEDEF_
#define _IR_GRAPH_TYPEDEF_
-/* to resolve recursion between entity.h and irgraph.h */
typedef struct ir_graph ir_graph;
#endif
-/****s* entity/entity
+/**
*
- * NAME
- * entity - An abstract data type to represent program entites.
- * NOTE
+ * An abstract data type to represent program entites.
*
- * ATTRIBUTES
- * owner A compound type this entity is a part of.
- * type The type of this entity.
- * name The string that represents this entity in the source program.
- * allocation A flag saying whether the entity is dynamically or statically
+ * @param owner A compound type this entity is a part of.
+ * @param type The type of this entity.
+ * @param name The string that represents this entity in the source program.
+ * @param allocation A flag saying whether the entity is dynamically or statically
* allocated (values: dynamic_allocated, static_allocated,
* automatic_allocated).
- * visibility A flag indicating the visibility of this entity (values: local,
+ * @param visibility A flag indicating the visibility of this entity (values: local,
* external_visible, external_allocated)
- * variability A flag indicating the variability of this entity (values:
+ * @param variability A flag indicating the variability of this entity (values:
* uninitialized, initalized, part_constant, constant)
- * offset The offset of the entity within the compound object. Only set
+ * @param volatility @@@
+ * @param offset The offset of the entity within the compound object in bits. Only set
* if the owner in the state "layout_fixed".
- * overwrites A list of entities overwritten by this entity. This list is only
+ * @param overwrites A list of entities overwritten by this entity. This list is only
* existent if the owner of this entity is a class. The members in
* this list must be entities of super classes.
- * overwrittenby A list of entities that overwrite this entity. This list is only
+ * @param overwrittenby A list of entities that overwrite this entity. This list is only
* existent if the owner of this entity is a class. The members in
* this list must be entities of sub classes.
- * link A void* to associate some additional information with the entity.
- * irg If the entity is a method this is the ir graph that represents the
+ * @param link A void* to associate some additional information with the entity.
+ * @param irg If the entity is a method this is the ir graph that represents the
* code of the method.
- * peculiarity The peculiarity of the entity. If the entity is a method this
+ * @param peculiarity The peculiarity of the entity. If the entity is a method this
* indicates whether the entity represents
* a real method or whether it only exists to describe an interface.
* In that case there nowhere exists code for this entity and this entity
* is never dynamically used in the code.
* Values: description, existent. Default: existent.
+ * @param visited visited flag. Master flag is type_visited.
*
- * These fields can only be accessed via access functions.
+ * @param These fields can only be accessed via access functions.
*
- * SEE ALSO
- * type
- * SOURCE
+ * @see type
*/
+/* to resolve recursion between entity.h and type.h */
+/** the type of an entity */
#ifndef _ENTITY_TYPEDEF_
#define _ENTITY_TYPEDEF_
-/* to resolve recursion between entity.h and type.h */
typedef struct entity entity;
#endif
-/* Creates a new entity.
- Automatically inserts the entity as a member of owner.
- Entity is automatic_allocated and uninitialize except if the type
- is type_method, then it is static_allocated and constant. The constant
- value is a pointer to the method.
- Visibility is local, offset -1, and it is not volatile. */
-entity *new_entity (type *owner, ident *name, type *type);
-/* Copies the entity if the new_owner is different from the
- owner of the old entity. Else returns the old entity.
- Automatically inserts the new entity as a member of owner. */
+/**
+ * Creates a new entity.
+ *
+ * Automatically inserts the entity as a member of owner.
+ * Entity is automatic_allocated and uninitialize except if the type
+ * is type_method, then it is static_allocated and constant. The constant
+ * value is a pointer to the method.
+ * Visibility is local, offset -1, and it is not volatile.
+ */
+entity *new_entity (type *owner, ident *name, type *tp);
+
+/**
+ * Creates a new entity.
+ *
+ * Automatically inserts the entity as a member of owner.
+ * Entity is automatic_allocated and uninitialize except if the type
+ * is type_method, then it is static_allocated and constant. The constant
+ * value is a pointer to the method.
+ * Visibility is local, offset -1, and it is not volatile.
+ */
+entity *new_d_entity (type *owner, ident *name, type *tp, dbg_info *db);
+
+/**
+ * Copies the entity if the new_owner is different from the
+ * owner of the old entity, else returns the old entity.
+ *
+ * Automatically inserts the new entity as a member of owner.
+ * Resets the overwrites/overwritten_by fields.
+ */
entity *copy_entity_own (entity *old, type *new_owner);
-/* Copies the entity if the new_name is different from the
- name of the old entity. Else returns the old entity.
- Automatically inserts the new entity as a member of owner.
- The mangled name ld_name is set to NULL. */
+
+/**
+ * Copies the entity if the new_name is different from the
+ * name of the old entity, else returns the old entity.
+ *
+ * Automatically inserts the new entity as a member of owner.
+ * The mangled name ld_name is set to NULL.
+ */
entity *copy_entity_name (entity *old, ident *new_name);
-/** manipulate fields of entity **/
+/**
+ * Frees the entity.
+ *
+ * The owner will still contain the pointer to this
+ * entity, as well as all other references!
+ */
+void free_entity (entity *ent);
+
+/** Returns the name of an entity. */
const char *get_entity_name (entity *ent);
+
+/** Returns the ident of an entity. */
ident *get_entity_ident (entity *ent);
-/* returns the mangled name of the entity. If the mangled name is
- set it returns the existing name. Else it generates a name
- with mangle_entity() and remembers this new name internally. */
+
+/** Returns the mangled name of the entity.
+ *
+ * If the mangled name is set it returns the existing name.
+ * Else it generates a name with mangle_entity()
+ * and remembers this new name internally.
+ */
ident *get_entity_ld_ident (entity *ent);
+
+/** Sets the mangled name of the entity. */
void set_entity_ld_ident (entity *ent, ident *ld_ident);
-const char *get_entity_ld_name (entity *end);
-/*
-char *get_entity_ld_name (entity *ent);
-void set_entity_ld_name (entity *ent, char *ld_name);
-*/
+/** Returns the mangled name of the entity as a string. */
+const char *get_entity_ld_name (entity *end);
+/** Returns the owner of the entity. */
type *get_entity_owner (entity *ent);
-/* Sets the owner field in entity to owner. */
+
+/** Sets the owner field in entity to owner. Don't forget to add
+ ent to owner!! */
void set_entity_owner (entity *ent, type *owner);
-inline void assert_legal_owner_of_ent(type *owner);
+/** Asserts if the type owner is neither a compound type or an array */
+void assert_legal_owner_of_ent(type *owner);
+
+/** Returns the type of an entity. */
type *get_entity_type (entity *ent);
-void set_entity_type (entity *ent, type *type);
+/** Sets the type of an entity. */
+void set_entity_type (entity *ent, type *tp);
+
+/** The allocation type. */
typedef enum {
- automatic_allocated,/* The entity is allocated during runtime, implicitly
- as component of a compound type. This is the default. */
- dynamic_allocated, /* The entity is allocated during runtime, explicitly
- by an Alloc node. */
- static_allocated /* The entity is allocated statically. We can use a
- SymConst(?) as address of the entity. */
+ allocation_automatic, /**< The entity is allocated during runtime, implicitly
+ as component of a compound type. This is the default. */
+ allocation_parameter, /**< The entity is a parameter. It is also automatic allocated.
+ We distinguish the allocation of paramters from the allocation
+ of local variables as their placement depends on the calling
+ conventions. */
+ allocation_dynamic, /**< The entity is allocated during runtime, explicitly
+ by an Alloc node. */
+ allocation_static /**< The entity is allocated statically. We can use a
+ Const as address of the entity. */
} ent_allocation;
+/** Returns the allocation type of an entity. */
ent_allocation get_entity_allocation (entity *ent);
+
+/** Sets the allocation type of an entity. */
void set_entity_allocation (entity *ent, ent_allocation al);
-/* This enumeration flags the visibility of entities. This is necessary
- for partial compilation. */
+/** Return the name of the allocation type. */
+const char *get_allocation_name(ent_allocation vis);
+
+/**
+ * This enumeration flags the visibility of entities. This is necessary
+ * for partial compilation.
+ */
typedef enum {
- local, /* The entity is only visible locally. This is the default. */
- external_visible, /* The entity is visible to other external program parts, but
- it is defined here. It may not be optimized away. The entity must
- be static_allocated. */
- external_allocated /* The entity is defined and allocated externally. This compilation
- must not allocate memory for this entity. The entity must
- be static_allocated. */
+ visibility_local, /**< The entity is only visible locally. This is the default. */
+ visibility_external_visible, /**< The entity is visible to other external program parts, but
+ it is defined here. It may not be optimized away. The entity must
+ be static_allocated. */
+ visibility_external_allocated, /**< The entity is defined and allocated externally. This compilation
+ must not allocate memory for this entity. The entity must
+ be static_allocated. This can also be an external defined
+ method. */
} ent_visibility;
+/** Returns the visibility of an entity. */
ent_visibility get_entity_visibility (entity *ent);
+
+/** Sets the visibility of an entity. */
void set_entity_visibility (entity *ent, ent_visibility vis);
-/* This enumeration flags the variability of entities. */
+/** Return the name of the visibility */
+const char *get_visibility_name(ent_visibility vis);
+
+/** This enumeration flags the variability of entities. */
typedef enum {
- uninitialized, /* The content of the entity is completely unknown. */
- initialized, /* After allocation the entity is initalized with the
- value given somewhere in the entity. */
- part_constant, /* For entities of compound types. Some members of the entity
- are constant. The others are uninitialized. Those members
- given a value for are constant. */
- constant /* The entity is constant. */
+ variability_uninitialized, /**< The content of the entity is completely unknown. */
+ variability_initialized, /**< After allocation the entity is initalized with the
+ value given somewhere in the entity. */
+ variability_part_constant, /**< For entities of compound types. Some members of the entity
+ are constant. The others are uninitialized. Those members
+ given a value for are constant. */
+ variability_constant /**< The entity is constant. */
} ent_variability;
+/** Returns the variability of an entity. */
ent_variability get_entity_variability (entity *ent);
+
+/** Sets the variability of an entity. */
void set_entity_variability (entity *ent, ent_variability var);
-/* This enumeration flags the volatility of entities. */
+/** Return the name of the variablity. */
+const char *get_variability_name(ent_variability var);
+
+/** This enumeration flags the volatility of entities. */
typedef enum {
- non_volatile, /* The entity is not volatile */
- is_volatile /* The entity is volatile */
+ volatility_non_volatile, /**< The entity is not volatile */
+ volatility_is_volatile /**< The entity is volatile */
} ent_volatility;
+/** Returns the volatility of an entity. */
ent_volatility get_entity_volatility (entity *ent);
+
+/** Sets the volatility of an entity. */
void set_entity_volatility (entity *ent, ent_volatility vol);
-/* For the definition of enumeration peculiarity see type.h */
+/* Return the name of the volatility. */
+const char *get_volatility_name(ent_volatility var);
+
+/** This enumeration flags the stickyness of an entity. */
+typedef enum {
+ stickyness_unsticky, /**< The entity can be removed from
+ the program, unless contraindicated
+ by other attributes */
+ stickyness_sticky /**< The entity must remain in the
+ program in any case */
+} ent_stickyness;
+
+/** Get the entity's stickyness */
+ent_stickyness get_entity_stickyness(entity *ent);
+
+/** Set the entity's stickyness */
+void set_entity_stickyness(entity *ent, ent_stickyness stickyness);
+
+/** Returns the offset of an entity (in a compound) in bytes. Only set if layout = fixed. */
+int get_entity_offset_bytes(entity *ent);
+
+/** Returns the offset of an entity (in a compound) in bits. Only set if layout = fixed. */
+int get_entity_offset_bits(entity *ent);
+
+/** Sets the offset of an entity (in a compound) in bytes. */
+void set_entity_offset_bytes(entity *ent, int offset);
+
+/** Sets the offset of an entity (in a compound) in bits. */
+void set_entity_offset_bits(entity *ent, int offset);
+
+/** Returns the stored intermediate information. */
+void* get_entity_link(entity *ent);
+
+/** Stores new intermediate information. */
+void set_entity_link(entity *ent, void *l);
+
+/* -- Fields of method entities -- */
+/* The entity knows the corresponding irg if the entity is a method.
+ This allows to get from a Call to the called irg.
+ Only entities of peculiarity "existent" can have a corresponding irg,
+ else the field is fixed to NULL. (Get returns NULL, set asserts.) */
+ir_graph *get_entity_irg(entity *ent);
+void set_entity_irg(entity *ent, ir_graph *irg);
+
+/** Return the peculiarity of an entity. */
peculiarity get_entity_peculiarity (entity *ent);
+
+/** Sets the peculiarity of an entity. */
void set_entity_peculiarity (entity *ent, peculiarity pec);
+/** Return the name of the peculiarity. */
+const char *get_peculiarity_name(peculiarity var);
+
+/* -- Representation of constant values of entites -- */
+/** Returns true if the the node is representable as code on
+ * const_code_irg. */
+int is_irn_const_expression(ir_node *n);
+/* Set current_ir_graph to get_const_code_irg() to generate a constant
+ expression. */
/* Copies a firm subgraph that complies to the restrictions for
constant expressions to current_block in current_ir_graph. */
ir_node *copy_const_value(ir_node *n);
-/* Set has no effect for entities of type method. */
+/* Set has no effect for existent entities of type method. */
ir_node *get_atomic_ent_value(entity *ent);
void set_atomic_ent_value(entity *ent, ir_node *val);
-/* Copies the value represented by the entity to current_block
- in current_ir_graph. @@@ oblivious, use copy_const_vallue */
-ir_node *copy_atomic_ent_value(entity *ent);
-/* A value of a compound entity is a pair of value and the corresponding
- member of the compound. */
-void add_compound_ent_value(entity *ent, ir_node *val, entity *member);
-/* oblivious, use copy_const_value @@@ */
-void copy_and_add_compound_ent_value(entity *ent, ir_node *val, entity *member);
+/* The following type describes a path to a leave in the compound graph.
+ Node 0 in the path must be an entity of type tp given in the constructor. If
+ the type of this element is compound, the path node 1 is an element of the type
+ of node 0 an so forth, until an entity of atomic type is reached. */
+#ifndef _COMPOUND_GRAPH_PATH_TYPEDEF_
+#define _COMPOUND_GRAPH_PATH_TYPEDEF_
+typedef struct compound_graph_path compound_graph_path;
+#endif /* _COMPOUND_GRAPH_PATH_TYPEDEF_ */
+compound_graph_path *new_compound_graph_path(type *tp, int length);
+int is_compound_graph_path(void *thing);
+void free_compound_graph_path (compound_graph_path *gr);
+int get_compound_graph_path_length(compound_graph_path *gr);
+entity *get_compound_graph_path_node(compound_graph_path *gr, int pos);
+void set_compound_graph_path_node(compound_graph_path *gr, int pos, entity *node);
+
+/* A value of a compound entity is a pair of a value and the description of the
+ corresponding access path to the member of the compound. */
+void add_compound_ent_value_w_path(entity *ent, ir_node *val, compound_graph_path *path);
+void set_compound_ent_value_w_path(entity *ent, ir_node *val, compound_graph_path *path, int pos);
int get_compound_ent_n_values(entity *ent);
ir_node *get_compound_ent_value(entity *ent, int pos);
+compound_graph_path *get_compound_ent_value_path(entity *ent, int pos);
+/* Removes all constant entries where the path ends at value_ent. Does not
+ free the memory of the paths. (The same path might be used for several
+ constant entities. */
+void remove_compound_ent_value(entity *ent, entity *value_ent);
+
+/* Some languages support only trivial access paths, i.e., the member is a
+ direct, atomic member of the constant entities type. In this case the
+ corresponding entity can be accessed directly. The following functions
+ allow direct access. */
+/* generates a Path with length 1 */
+void add_compound_ent_value(entity *ent, ir_node *val, entity *member);
+/* Returns the last member in the path */
entity *get_compound_ent_value_member(entity *ent, int pos);
+/* Sets the path at pos 0 */
void set_compound_ent_value(entity *ent, ir_node *val, entity *member, int pos);
-/* Inits the entity ent witch must be of a one dimensional
+
+
+
+/** Inits the entity ent witch must be of a one dimensional
array type with the values given in the values array.
The array must have a lower and an upper bound. Keeps the
order of values. Does not test whether the number of values
fits into the given array size. Does not test whether the
values have the proper mode for the array. */
void set_array_entity_values(entity *ent, tarval **values, int num_vals);
-/* Copies the value pos of the entity to current_block in current_ir_graph. */
-ir_node *copy_compound_ent_value(entity *ent, int pos);
-
-/* Only set if layout = fixed. */
-int get_entity_offset (entity *ent);
-void set_entity_offset (entity *ent, int offset);
+/* --- Fields of entities with a class type as owner --- */
/* Overwrites is a field that specifies that an access to the overwritten
entity in the supertype must use this entity. It's a list as with
multiple inheritance several enitites can be overwritten. This field
both relations, they only differ in the order of arguments. */
void add_entity_overwrites (entity *ent, entity *overwritten);
int get_entity_n_overwrites (entity *ent);
+int get_entity_overwrites_index(entity *ent, entity *overwritten);
entity *get_entity_overwrites (entity *ent, int pos);
void set_entity_overwrites (entity *ent, int pos, entity *overwritten);
+void remove_entity_overwrites(entity *ent, entity *overwritten);
+
void add_entity_overwrittenby (entity *ent, entity *overwrites);
int get_entity_n_overwrittenby (entity *ent);
+int get_entity_overwrittenby_index(entity *ent, entity *overwrites);
entity *get_entity_overwrittenby (entity *ent, int pos);
void set_entity_overwrittenby (entity *ent, int pos, entity *overwrites);
+void remove_entity_overwrittenby(entity *ent, entity *overwrites);
-/* A link to store intermediate information */
-void* get_entity_link(entity *ent);
-void set_entity_link(entity *ent, void *l);
-
-/* The entity knows the corresponding irg if the entity is a method.
- This allows to get from a Call to the called irg.
- Only entities of peculiarity "existent" can have a corresponding irg,
- else the field is fixed to NULL. (Get returns NULL, set asserts.) */
-ir_graph *get_entity_irg(entity *ent);
-void set_entity_irg(entity *ent, ir_graph *irg);
-
+/**
+ * Checks whether a pointer points to an entity.
+ *
+ * @param thing an arbitrary pointer
+ *
+ * @return
+ * true if the thing is an entity, else false
+ */
+int is_entity (void *thing);
-/* Returns true if the type of the entity is a primitive, pointer
+/** Returns true if the type of the entity is a primitive, pointer
enumeration or method type. */
int is_atomic_entity(entity *ent);
-/* Returns true if the type of the entity is a class, structure,
+/** Returns true if the type of the entity is a class, structure,
array or union type. */
int is_compound_entity(entity *ent);
+/** Returns true if ent1 and ent2 have are equal except for their owner.
+ Two entities are equal if
+ - they have the same type (the same C-struct)
+ - ...?
+*/
+bool equal_entity(entity *ent1, entity *ent2);
+
+
+/** Outputs a unique number for this entity if libfirm is compiled for
+ debugging, (configure with --enable-debug) else returns 0. */
+long get_entity_nr(entity *ent);
+
+/** Returns the entitys visited count. */
+unsigned long get_entity_visited(entity *ent);
+
+/** Sets the entitys visited count. */
+void set_entity_visited(entity *ent, unsigned long num);
+
+/** Sets visited field in entity to entity_visited. */
+void mark_entity_visited(entity *ent);
+
+/** Returns true if this entity was visited. */
+bool entity_visited(entity *ent);
+
+/** Returns true if this entity was not visited. */
+bool entity_not_visited(entity *ent);
+
+/** Returns the dynamically referenced entity if the static entity and the
+ * dynamic type are given. */
+entity *resolve_ent_polymorphy(type *dynamic_class, entity* static_ent);
+
+
+/*-----------------------------------------------------------------*/
+/* Debug aides */
+/*-----------------------------------------------------------------*/
+
+
+/** Write the entity and all its attributes to stdout.
+ *
+ * Writes the entity and all its attributes to stdout if DEBUG_libfirm
+ * is set. Else does nothing. */
+void dump_entity (entity *ent);
-/*****/
# endif /* _ENTITY_H_ */
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