X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=ir%2Ftr%2Fentity.h;h=b6910eeb79c7bb5b5371a7e2e4ddc75ea35eca8e;hb=b79f4f37c72bc1ba947814a068bf696b4dffb369;hp=c1cbb7b8edf9bfe1617c54f26008c69ed5c01675;hpb=aa430d14a092961d948a4a15effca64e51375938;p=libfirm diff --git a/ir/tr/entity.h b/ir/tr/entity.h index c1cbb7b8e..b6910eeb7 100644 --- a/ir/tr/entity.h +++ b/ir/tr/entity.h @@ -1,46 +1,57 @@ /* -** 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. */ /* $Id$ */ @@ -50,206 +61,353 @@ # 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) - * volatility @@@ - * 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. - * visited visited flag. Master flag is type_visited. + * @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 *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); -/* 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. */ +/** + * 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); -/* Frees the entity. The owner will still contain the pointer to this - entity, as well as all other references! */ + +/** + * Frees the entity. + * + * The owner will still contain the pointer to this + * entity, as well as all other references! + */ void free_entity (entity *ent); -/** manipulate fields of entity **/ -const char *get_entity_name (entity *ent); -ident *get_entity_ident (entity *ent); +/** Returns the name of an entity. */ +const char *get_entity_name (const entity *ent); + +/** Returns the ident of an entity. */ +ident *get_entity_ident (const 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); +/** Returns the mangled name of the entity as a string. */ +const char *get_entity_ld_name (entity *ent); + +/** Returns the owner of the entity. */ type *get_entity_owner (entity *ent); -/* Sets the owner field in entity to owner. Don't forget to add + +/** 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 either 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 parameters 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; -ent_allocation get_entity_allocation (entity *ent); +/** Returns the allocation type of an entity. */ +ent_allocation get_entity_allocation (const 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. This can also be an external defined - method. */ + 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; -ent_visibility get_entity_visibility (entity *ent); +/** Returns the visibility of an entity. */ +ent_visibility get_entity_visibility (const 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. + The members of the entity are mixed constant, + initialized or uninitialized. */ + variability_constant /**< The entity is constant. */ } ent_variability; -ent_variability get_entity_variability (entity *ent); +/** Returns the variability of an entity. */ +ent_variability get_entity_variability (const 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; -ent_volatility get_entity_volatility (entity *ent); +/** Returns the volatility of an entity. */ +ent_volatility get_entity_volatility (const entity *ent); + +/** Sets the volatility of an entity. */ void set_entity_volatility (entity *ent, ent_volatility vol); -/* Only set if layout = fixed. */ -int get_entity_offset (entity *ent); -void set_entity_offset (entity *ent, int offset); +/** Return the name of the volatility. */ +const char *get_volatility_name(ent_volatility var); -/* A link to store intermediate information */ -void* get_entity_link(entity *ent); +/** 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(const 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(const entity *ent); + +/** Returns the offset of an entity (in a compound) in bits. Only set if layout = fixed. */ +int get_entity_offset_bits(const 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(const 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. +/* -- 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); +ir_graph *get_entity_irg(const entity *ent); void set_entity_irg(entity *ent, ir_graph *irg); -/* For the definition of enumeration peculiarity see type.h */ -peculiarity get_entity_peculiarity (entity *ent); +/** Return the peculiarity of an entity. */ +peculiarity get_entity_peculiarity (const entity *ent); + +/** Sets the peculiarity of an entity. */ void set_entity_peculiarity (entity *ent, peculiarity pec); -/** Representation of constant values of entites **/ +/** 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. */ + +/** + * 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); -/* A value of a compound entity is a pair of a value and the corresponding - member of the compound. */ -void 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); +int get_compound_graph_path_array_index(compound_graph_path *gr, int pos); +void set_compound_graph_path_array_index(compound_graph_path *gr, int pos, int index); + +/* 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); +/** Returns the number of constant values needed to initialize the entity. + * + * Asserts if the entity has variability_uninitialized. + * */ 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); -void remove_compound_ent_value(entity *ent, entity *value_ent); -/* 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 @@ -257,7 +415,49 @@ void remove_compound_ent_value(entity *ent, entity *value_ent); values have the proper mode for the array. */ void set_array_entity_values(entity *ent, tarval **values, int num_vals); -/** Fields of entities with a class type as owner **/ +/** Return the overall offset of value at position pos in bits. + * + * This requires that the layout of all concerned types is fixed. + * + * @param ent Any entity of compound type with at least pos initialization values. + * @param pos The position of the value for which the offset is requested. + */ +int get_compound_ent_value_offset_bits(entity *ent, int pos); + +/** Return the overall offset of value at position pos in bytes. + * + * This requires that the layout of all concerned types is fixed. + * Asserts if bit offset is not byte aligned. + * + * @param ent Any entity of compound type with at least pos initialization values. + * @param pos The position of the value for which the offset is requested. + */ +int get_compound_ent_value_offset_bytes(entity *ent, int pos); + +/** Compute the array indicees in compound graph paths of initialized entities. + * + * All arrays must have fixed lower and upper bounds. One array can + * have an open upper bound. If there are several open bounds, we do + * nothing. There must be initializer elements for all array + * elements. Uses the link field in the array element entities. The + * array bounds must be representable as ints. + * + * @param ent Any entity. + */ +void compute_compound_ent_array_indicees(entity *ent); + +/** Sort the values of the compound entity by their overall offset. + * + * This requires that the layout of all concerned types is fixed. + * If the entity has no initialization information the method just + * returns. This is needed to dump the entity in a backend. + * + * @param ent Any entity. + */ +void sort_compound_ent_values(entity *ent); + + +/* --- 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 @@ -269,22 +469,36 @@ void set_array_entity_values(entity *ent, tarval **values, int num_vals); 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); + +/** + * 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 (const 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. +/** 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) - ...? @@ -292,12 +506,67 @@ int is_compound_entity(entity *ent); bool equal_entity(entity *ent1, entity *ent2); -unsigned long get_entity_visited(entity *entity); -void set_entity_visited(entity *entity, unsigned long num); -/* Sets visited field in entity to entity_visited. */ -void mark_entity_visited(entity *entity); +/** 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); + +/** + * @page unknown_entity + * + * This entity is an auxiliary entity dedicated to support analyses. + * + * The unknown entity represents that there could be an entity, but it is not + * known. This entity can be used to initialize fields before an analysis (not known + * yet) or to represent the top of a lattice (could not be determined). There exists + * exactly one entity unknown. This entity has as owner and as type the unknown type. It is + * allocated when initializing the entity module. + * + * The entity can take the role of any entity, also methods. It returns default + * values in these cases. + * + * The following values are set: + * name = "unknown_entity" + * ld_name = "unknown_entity" + * owner = unknown_type + * type = unknown_type + * visibility = visibility_external_allocated + * offset = -1 + * variability = variability_uninitialized + * value = SymConst(unknown_entity) + * values = NULL + * val_paths = NULL + * peculiarity = peculiarity_existent + * volatility = volatility_non_volatile + * stickyness = stickyness_unsticky + * ld_name = NULL + * overwrites = NULL + * overwrittenby = NULL + * irg = NULL + * link = NULL + * + */ +/* A variable that contains the only unknown entity. */ +extern entity *unknown_entity; +/* Returns the unknown entity */ +entity *get_unknown_entity(void); # endif /* _ENTITY_H_ */