3 * File name: ir/tr/type.h
4 * Purpose: Representation of types.
5 * Author: Goetz Lindenmaier
9 * Copyright: (c) 2001-2003 Universität Karlsruhe
10 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
17 * Datastructure to hold type information.
19 * @author Goetz Lindenmaier
21 * This module supplies a datastructure to represent all types
22 * known in the compiled program. This includes types specified
23 * in the program as well as types defined by the language. In the
24 * view of the intermediate representation there is no difference
25 * between these types.
27 * There exist several kinds of types, arranged by the structure of
28 * the type. A type is described by a set of attributes. Some of
29 * these attributes are common to all types, others depend on the
32 * Types are different from the modes defined in irmode: Types are
33 * on the level of the programming language, modes at the level of
34 * the target processor.
43 # include "firm_common.h"
50 /* to resolve recursion between entity.h and type.h */
51 #ifndef _ENTITY_TYPEDEF_
52 #define _ENTITY_TYPEDEF_
53 typedef struct entity entity;
56 #ifndef _IR_NODE_TYPEDEF_
57 #define _IR_NODE_TYPEDEF_
58 typedef struct ir_node ir_node;
62 * An abstract data type to represent types.
64 * This is the abstract data type with which any type known in the
65 * compiled program can be represented. This includes types specified
66 * in the program as well as types defined by the language. In the
67 * view of the intermediate representation there is no difference
68 * between these types.
70 * There exist several kinds of types, arranged by the structure of
71 * the type. These are distinguished by a type opcode.
72 * A type is described by a set of attributes. Some of these attributes
73 * are common to all types, others depend on the kind of the type.
75 * The following describes the common attributes. They can only be
76 * accessed by the functions given below.
78 * The common fields are:
80 * - firm_kind: A firm_kind tag containing k_type. This is useful
81 * for dynamically checking whether a node is a type node.
82 * - type_op: A tp_op specifying the kind of the type.
83 * - mode: The mode to be used to represent the type on a machine.
84 * - name: An identifier specifying the name of the type. To be
85 * set by the frontend.
86 * - size: The size of the type, i.e. an entity of this type will
87 * occupy size bytes in memory. In several cases this is
88 * determined when fixing the layout of this type (class,
89 * struct, union, array, enumeration).
90 * - state: The state of the type. The state represents whether the
91 * layout of the type is undefined or fixed (values: layout_undefined
92 * or layout_fixed). Compound types can have an undefined
93 * layout. The layout of the basic types primitive and pointer
94 * is always layout_fixed. If the layout of
95 * compound types is fixed all entities must have an offset
96 * and the size of the type must be set.
97 * A fixed layout for enumeration types means that each enumeration
98 * is associated with an implementation value.
99 * - visit: A counter for walks of the type information.
100 * - link: A void* to associate some additional information with the type.
102 * These fields can only be accessed via access functions.
104 * Depending on the value of @c type_op, i.e., depending on the kind of the
105 * type the adt contains further attributes. These are documented below.
109 * @link class_type class @endlink, @link struct_type struct @endlink,
110 * @link method_type method @endlink, @link union_type union @endlink,
111 * @link array_type array @endlink, @link enumeration_type enumeration @endlink,
112 * @link pointer_type pointer @endlink, @link primitive_type primitive @endlink
115 * mode maybe not global field??
117 #ifndef _TYPE_TYPEDEF_
118 #define _TYPE_TYPEDEF_
119 typedef struct type type;
122 # include "type_or_entity.h"
124 /** Frees the memory used by the type. Does not free the entities
125 belonging to the type, except for the array element entity. */
126 void free_type(type *tp);
128 tp_op* get_type_tpop(type *tp);
129 ident* get_type_tpop_nameid(type *tp);
130 const char* get_type_tpop_name(type *tp);
131 tp_opcode get_type_tpop_code(type *tp);
133 ident* get_type_ident(type *tp);
134 void set_type_ident(type *tp, ident* id);
135 const char* get_type_name(type *tp);
137 /** The state of a type layout. */
139 layout_undefined, /**< The layout of this type is not defined.
140 Address computation to access fields is not
141 possible, fields must be accessed by Sel
142 nodes. This is the default value except for
143 pointer, primitive and method types. */
144 layout_fixed /**< The layout is fixed, all component/member entities
145 have an offset assigned. Size of the type is known.
146 Arrays can be accessed by explicit address
147 computation. Default for pointer, primitive ane method
151 /** Returns the type layout state of a type. */
152 type_state get_type_state(type *tp);
154 /** Sets the type layout state of a type.
156 * For primitives, pointer and method types the layout is always fixed.
157 * This call is legal but has no effect.
159 void set_type_state(type *tp, type_state state);
161 /** Returns the mode of a type.
163 * Returns NULL for all non atomic types.
165 ir_mode* get_type_mode(type *tp);
167 /** Sets the mode of a type.
169 * Only has an effect on primitive and enumeration types.
171 void set_type_mode(type *tp, ir_mode* m);
173 /** Returns the size of a type. */
174 int get_type_size(type *tp);
176 /** Sets the size of a type.
178 * For primitive, enumeration, pointer and method types the size
179 * is always fixed. This call is legal but has no effect.
181 void set_type_size(type *tp, int size);
184 unsigned long get_type_visited(type *tp);
185 void set_type_visited(type *tp, unsigned long num);
186 /* Sets visited field in type to type_visited. */
187 void mark_type_visited(type *tp);
188 /* @@@ name clash!! bool type_visited(type *tp); */
189 bool type_not_visited(type *tp);
191 void* get_type_link(type *tp);
192 void set_type_link(type *tp, void *l);
195 * Visited flag to traverse the type information.
197 * Increase this flag by one before traversing the type information.
198 * Mark type nodes as visited by set_type_visited(type, type_visited).
199 * Check whether node was already visited by comparing get_type_visited(type)
201 * Or use the function to walk all types.
205 extern unsigned long type_visited;
206 void set_master_type_visited(unsigned long val);
207 unsigned long get_master_type_visited(void);
208 void inc_master_type_visited(void);
211 * Checks whether a pointer points to a type.
213 * @param thing an arbitrary pointer
216 * true if the thing is a type, else false
218 int is_type (void *thing);
221 * Checks whether two types are structural equal.
223 * @param st pointer type
224 * @param lt pointer type
227 * true if the types are equal, else false.
228 * Types are equal if :
229 * - they are the same type kind
230 * - they have the same name
231 * - they have the same mode (if applicable)
232 * - they have the same type_state and, ev., the same size
233 * - they are class types and have
234 * - the same members (see same_entity in entity.h)
235 * - the same supertypes -- the C-pointers are compared --> no recursive call.
236 * - the same number of subtypes. Subtypes are not compared,
237 * as this could cause a cyclic test.
238 * - the same peculiarity
239 * - they are structure types and have the same members
240 * - they are method types and have
241 * - the same parameter types
242 * - the same result types
243 * - they are union types and have the same members
244 * - they are array types and have
245 * - the same number of dimensions
246 * - the same dimension bounds
247 * - the same dimension order
248 * - the same element type
249 * - they are enumeration types and have the same enumerator names
250 * - they are pointer types and have the identical points_to type
251 * (i.e., the same C-struct to represent the type, type_id is skipped.
252 * This is to avoid endless recursions; with pointer types circlic
253 * type graphs are possible.)
255 bool equal_type(type *tpy1, type *typ2);
258 * Checks whether two types are structural comparable.
260 * @param st pointer type
261 * @param lt pointer type
264 * true if type st is smaller than type lt, i.e. whenever
265 * lt is expected a st can be used.
267 * - they are the same type kind
268 * - mode(st) < mode (lt) (if applicable)
269 * - they are class types and st is (transitive) subtype of lt,
270 * - they are structure types and
271 * - the members of st have exactly one counterpart in lt with the same name,
272 * - the counterpart has a bigger type.
273 * - they are method types and have
274 * - the same number of parameter and result types,
275 * - the parameter types of st are smaller than those of lt,
276 * - the result types of st are smaller than those of lt
277 * - they are union types and have the members of st have exactly one
278 * @return counterpart in lt and the type is smaller
279 * - they are array types and have
280 * - the same number of dimensions
281 * - all bounds of lt are bound of st
282 * - the same dimension order
283 * - the same element type
285 * - the element type of st is smaller than that of lt
286 * - the element types have the same size and fixed layout.
287 * - they are enumeration types and have the same enumerator names
288 * - they are pointer types and have the points_to type of st is
289 * @return smaller than the points_to type of lt.
292 bool smaller_type (type *st, type *lt);
295 * @page class_type Representation of a class type
297 * If the type opcode is set to type_class the type represents class
298 * types. A list of fields and methods is associated with a class.
299 * Further a class can inherit from and bequest to other classes.
301 * The following attributes are private to this type kind:
302 * - member: All entities belonging to this class. This are methode entities
303 * which have type_method or fields that can have any of the
304 * following type kinds: type_class, type_struct, type_union,
305 * type_array, type_enumeration, type_pointer, type_primitive.
307 * The following two are dynamic lists that can be grown with an "add_" function,
310 * - subtypes: A list of direct subclasses.
312 * - supertypes: A list of direct superclasses.
314 * - peculiarity: The peculiarity of this class. If the class is of peculiarity
315 * "description" it only is a description of requirememts to a class,
316 * as, e.g., a Java interface. The class will never be allocated.
317 * Peculiatity inherited is only possible for entities. An entity
318 * is of peculiarity inherited if the compiler generated the entity
319 * to explicitly resolve inheritance. An inherited method entity has
321 * Values: description, existent, inherited. Default: existent.
325 /** Creates a new class type. */
326 type *new_type_class (ident *name);
328 /** Creates a new class type with debug information. */
329 type *new_d_type_class (ident *name, dbg_info *db);
331 /* --- manipulate private fields of class type --- */
333 /** Adds the entity as member of the class. */
334 void add_class_member (type *clss, entity *member);
336 /** Returns the number of members of this class. */
337 int get_class_n_members (type *clss);
339 /** Returns the member at position pos, 0 <= pos < n_member */
340 entity *get_class_member (type *clss, int pos);
342 /** Returns index of mem in clss, -1 if not contained. */
343 int get_class_member_index(type *clss, entity *mem);
345 /** Overwrites the member at position pos, 0 <= pos < n_member with
346 the passed entity. */
347 void set_class_member (type *clss, entity *member, int pos);
349 /** Replaces complete member list in class type by the list passed.
350 Copies the list passed. This function is necessary to reduce the number of members.
351 members is an array of entities, num the size of this array. Sets all
352 owners of the members passed to clss. */
353 void set_class_members (type *clss, entity *members[], int arity);
355 /** Finds member in the list of members and removes it.
356 Shrinks the member list, so iterate from the end!!!
357 Does not deallocate the entity. */
358 void remove_class_member(type *clss, entity *member);
361 /** Adds subtype as subtype to clss.
362 Checks whether clss is a supertype of subtype. If not
363 adds also clss as supertype to subtype. */
364 void add_class_subtype (type *clss, type *subtype);
366 /** Returns the number of subtypes */
367 int get_class_n_subtypes (type *clss);
369 /** Gets the subtype at position pos, 0 <= pos < n_subtype. */
370 type *get_class_subtype (type *clss, int pos);
372 /** Sets the subtype at positioin pos, 0 <= pos < n_subtype.
373 Does not set the corresponding supertype relation for subtype: this might
374 be a different position! */
375 void set_class_subtype (type *clss, type *subtype, int pos);
377 /** Finds subtype in the list of subtypes and removes it */
378 void remove_class_subtype(type *clss, type *subtype);
381 /** Adds supertype as supertype to class.
382 Checks whether clss is a subtype of supertype. If not
383 adds also clss as subtype to supertype. */
384 void add_class_supertype (type *clss, type *supertype);
386 /** Returns the number of supertypes */
387 int get_class_n_supertypes (type *clss);
389 /** Returns the index of an supertype in a type. */
390 int get_class_supertype_index(type *clss, type *super_clss);
392 /** Gets the supertype at position pos, 0 <= pos < n_supertype. */
393 type *get_class_supertype (type *clss, int pos);
395 /** Sets the supertype at postition pos, 0 <= pos < n_subtype.
396 Does not set the corresponding subtype relation for supertype: this might
397 be a different position! */
398 void set_class_supertype (type *clss, type *supertype, int pos);
400 /** Finds supertype in the list of supertypes and removes it */
401 void remove_class_supertype(type *clss, type *supertype);
403 /** This enumeration flags the peculiarity of entities and types. */
404 typedef enum peculiarity {
405 description, /**< Represents only a description. The entity/type is never
406 allocated, no code/data exists for this entity/type. */
407 inherited, /**< Describes explicitly that other entities are
408 inherited to the owner of this entity.
409 Overwrites must refer to at least one other
410 entity. If this is a method entity there exists
411 no irg for this entity, only for one of the
413 existent /**< The entity/type (can) exist. */
416 /* The peculiarity of the class. The enumeration peculiarity is defined
418 INLINE peculiarity get_class_peculiarity (type *clss);
419 INLINE void set_class_peculiarity (type *clss, peculiarity pec);
421 /* Set and get a class' dfn --
422 @todo This is an undocumented field, subject to change! */
423 void set_class_dfn (type *clss, int dfn);
424 int get_class_dfn (type *clss);
426 /** Returns true if a type is a class type. */
427 bool is_class_type(type *clss);
429 /** Returns true if low is subclass of high. */
430 bool is_subclass_of(type *low, type *high);
433 * @page struct_type Representation of a struct type
435 * Type_strct represents aggregate types that consist of a list
437 * The following attributes are private to this type kind:
438 * - member: All entities belonging to this class. This are the fields
439 * that can have any of the following types: type_class,
440 * type_struct, type_union, type_array, type_enumeration,
441 * type_pointer, type_primitive.
442 * This is a dynamic list that can be grown with an "add_" function,
444 * This is a dynamic list that can be grown with an "add_" function,
447 /** Creates a new type struct */
448 type *new_type_struct (ident *name);
449 /** Creates a new type struct with debug information. */
450 type *new_d_type_struct (ident *name, dbg_info* db);
452 /* manipulate private fields of struct */
453 void add_struct_member (type *strct, entity *member);
454 int get_struct_n_members (type *strct);
455 entity *get_struct_member (type *strct, int pos);
456 void set_struct_member (type *strct, int pos, entity *member);
458 /** Finds member in the list of members and removes it. */
459 void remove_struct_member (type *strct, entity *member);
461 /** Returns true if a type is a struct type. */
462 bool is_struct_type(type *strct);
465 * @page method_type Representation of a method type
467 * A method type represents a method, function or procedure type.
468 * It contains a list of the parameter and result types, as these
469 * are part of the type description. These lists should not
470 * be changed by a optimization, as a change creates a new method
471 * type. Therefore optimizations should allocated new method types.
472 * The set_ routines are only for construction by a frontend.
474 * - n_params: Number of parameters to the procedure.
475 * A procedure in FIRM has only call by value parameters.
477 * - param_type: A list with the types of parameters. This list is ordered.
478 * The nth type in this list corresponds to the nth element
479 * in the parameter tuple that is a result of the start node.
480 * (See ircons.h for more information.)
483 * A list of entities (whose owner is a struct private to the
484 * method type) that represent parameters passed by value.
486 * - n_res: The number of results of the method. In general, procedures
487 * have zero results, functions one.
489 * - res_type: A list with the types of parameters. This list is ordered.
490 * The nth type in this list corresponds to the nth input to
491 * Return nodes. (See ircons.h for more information.)
494 * A list of entities (whose owner is a struct private to the
495 * method type) that represent results passed by value.
498 /* These makros define the suffixes for the types and entities used
499 to represent value parameters / results. */
500 #define VALUE_PARAMS_SUFFIX "val_param"
501 #define VALUE_RESS_SUFFIX "val_res"
503 /** Create a new method type.
505 * @param name the name (ident) of this type
506 * @param n_param the number of parameters
507 * @param n_res the number of results
509 * The arrays for the parameter and result types are not initialized by
512 type *new_type_method (ident *name, int n_param, int n_res);
514 /** Create a new method type with debug information.
516 * @param name the name (ident) of this type
517 * @param n_param the number of parameters
518 * @param n_res the number of results
519 * @param db user defined debug information
521 * The arrays for the parameter and result types are not initialized by
524 type *new_d_type_method (ident *name, int n_param, int n_res, dbg_info* db);
526 /* -- manipulate private fields of method. -- */
528 /** Returns the number of parameters of this method. */
529 int get_method_n_params (type *method);
531 /** Returns the type of the parameter at position pos of a method. */
532 type *get_method_param_type(type *method, int pos);
533 /** Sets the type of the parameter at position pos of a method.
534 Also changes the type in the pass-by-value representation by just
535 changing the type of the corresponding entity if the representation is constructed. */
536 void set_method_param_type(type *method, int pos, type* tp);
537 /* Returns an entity that represents the copied value argument. Only necessary
538 for compounds passed by value. This information is constructed only on demand. */
539 entity *get_method_value_param_ent(type *method, int pos);
541 int get_method_n_ress (type *method);
542 type *get_method_res_type(type *method, int pos);
543 /** Sets the type of the result at position pos of a method.
544 Also changes the type in the pass-by-value representation by just
545 changing the type of the corresponding entity if the representation is constructed. */
546 void set_method_res_type(type *method, int pos, type* tp);
547 /* Returns an entity that represents the copied value result. Only necessary
548 for compounds passed by value. This information is constructed only on demand. */
549 entity *get_method_value_res_ent(type *method, int pos);
552 * this enum flags the variadicity of methods (methods with a
553 * variable amount of arguments (e.g. C's printf). Default is
556 typedef enum variadicity {
557 non_variadic, /**< non variadic */
558 variadic /**< variadic */
561 /** Returns the variadicity of a method. */
562 variadicity get_method_variadicity(type *method);
564 /** Sets the variadicity of a method. */
565 void set_method_variadicity(type *method, variadicity vari);
567 /** Returns true if a type is a method type. */
568 bool is_method_type (type *method);
571 * @page union_type Representation of a union type.
573 * The union type represents union types.
574 * - n_types: Number of unioned types.
575 * - members: Entities for unioned types. Fixed length array.
576 * This is a dynamic list that can be grown with an "add_" function,
579 /** Creates a new type union. */
580 type *new_type_union (ident *name);
582 /** Creates a new type union with debug information. */
583 type *new_d_type_union (ident *name, dbg_info* db);
585 /* --- manipulate private fields of struct --- */
587 /** Returns the number of unioned types of this union */
588 int get_union_n_members (type *uni);
590 /** Adds a new entity to a union type */
591 void add_union_member (type *uni, entity *member);
593 /** Returns the entity at position pos of a union */
594 entity *get_union_member (type *uni, int pos);
596 /** Overwrites a entity at position pos in a union type. */
597 void set_union_member (type *uni, int pos, entity *member);
599 /** Finds member in the list of members and removes it. */
600 void remove_union_member (type *uni, entity *member);
602 /** Returns true if a type is a union type. */
603 bool is_union_type (type *uni);
606 * @page array_type Representation of an array type
608 * The array type represents rectangular multi dimensional arrays.
609 * The constants representing the bounds must be allocated to
610 * get_const_code_irg() by setting current_ir_graph accordingly.
612 * - n_dimensions: Number of array dimensions.
613 * - *lower_bound: Lower bounds of dimensions. Usually all 0.
614 * - *upper_bound: Upper bounds or dimensions.
615 * - *element_type: The type of the array elements.
616 * - *element_ent: An entity for the array elements to be used for
617 * element selection with Sel.
619 * Do we need several entities? One might want
620 * to select a dimension and not a single element in case of multidim arrays.
623 /** Create a new type array.
625 * Sets n_dimension to dimension and all dimension entries to NULL.
626 * Initializes order to the order of the dimensions.
627 * The entity for array elements is built automatically.
628 * Set dimension sizes after call to constructor with set_* routines.
630 type *new_type_array (ident *name, int n_dimensions,
633 /** Create a new type array with debug information.
635 * Sets n_dimension to dimension and all dimension entries to NULL.
636 * Initializes order to the order of the dimensions.
637 * The entity for array elements is built automatically.
638 * Set dimension sizes after call to constructor with set_* routines.
640 type *new_d_type_array (ident *name, int n_dimensions,
641 type *element_type, dbg_info* db);
643 /* --- manipulate private fields of array type --- */
645 /** Returns the number of array dimensions of this type. */
646 int get_array_n_dimensions (type *array);
648 /** Allocates Const nodes of mode_I for the array dimensions */
649 void set_array_bounds_int (type *array, int dimension, int lower_bound,
651 void set_array_bounds (type *array, int dimension, ir_node *lower_bound,
652 ir_node *upper_bound);
653 void set_array_lower_bound (type *array, int dimension, ir_node *lower_bound);
654 void set_array_lower_bound_int (type *array, int dimension, int lower_bound);
655 void set_array_upper_bound (type *array, int dimension, ir_node *upper_bound);
656 void set_array_upper_bound_int (type *array, int dimension, int lower_bound);
657 /* returns true if lower bound != Unknown */
658 int has_array_lower_bound (type *array, int dimension);
659 ir_node * get_array_lower_bound (type *array, int dimension);
660 int has_array_upper_bound (type *array, int dimension);
661 ir_node * get_array_upper_bound (type *array, int dimension);
663 void set_array_order (type *array, int dimension, int order);
664 int get_array_order (type *array, int dimension);
666 void set_array_element_type (type *array, type *tp);
667 type *get_array_element_type (type *array);
669 void set_array_element_entity (type *array, entity *ent);
670 entity *get_array_element_entity (type *array);
672 /** Returns true if a type is an array type. */
673 bool is_array_type (type *array);
676 * @page enumeration_type Representation of an enumeration type
678 * Enumeration types need not necessarily be represented explicitly
679 * by Firm types, as the frontend can lower them to integer constants as
680 * well. For debugging purposes or similar tasks this information is useful.
682 * - *enum: The target values representing the constants used to
683 * represent individual enumerations.
684 * - *enum_nameid: Idents containing the source program name of the enumeration
687 /** Create a new type enumeration -- set the enumerators independently. */
688 type *new_type_enumeration (ident *name, int n_enums);
690 /** Create a new type enumeration with debug information -- set the enumerators independently. */
691 type *new_d_type_enumeration (ident *name, int n_enums, dbg_info* db);
693 /* --- manipulate fields of enumeration type. --- */
695 /** Returns the number of enumeration values of this enumeration */
696 int get_enumeration_n_enums (type *enumeration);
698 /** Sets the enumeration value at a given position. */
699 void set_enumeration_enum (type *enumeration, int pos, tarval *con);
701 /** Returns the enumeration value at a given position. */
702 tarval *get_enumeration_enum (type *enumeration, int pos);
704 /** Assign an ident to an enumeration value at a given position. */
705 void set_enumeration_nameid (type *enumeration, int pos, ident *id);
707 /** Returns the assigned ident of an enumeration value at a given position. */
708 ident *get_enumeration_nameid (type *enumeration, int pos);
710 /** Returns the assigned name of an enumeration value at a given position. */
711 const char *get_enumeration_name(type *enumeration, int pos);
713 /** Returns true if a type is a enumeration type. */
714 bool is_enumeration_type (type *enumeration);
717 * @page pointer_type Representation of a pointer type
719 * The mode of the pointer type must be a mode_reference.
722 * - points_to: The type of the entity this pointer points to.
725 /** Creates a new type pointer with mode mode_p. */
726 #define new_type_pointer(N, P) new_type_pointer_mode(N, P, mode_P)
727 //type *new_type_pointer (ident *name, type *points_to);
729 /** Creates a new type pointer with given pointer mode. */
730 type *new_type_pointer_mode (ident *name, type *points_to, ir_mode *ptr_mode);
732 /** Creates a new type pointer given pointer mode and with debug information. */
733 type *new_d_type_pointer (ident *name, type *points_to, ir_mode *ptr_mode, dbg_info* db);
735 /* --- manipulate fields of type_pointer --- */
737 /** Sets the type to which a pointer points to. */
738 void set_pointer_points_to_type (type *pointer, type *tp);
740 /** Returns the type to which a pointer points to. */
741 type *get_pointer_points_to_type (type *pointer);
743 /** Returns true if a type is a pointer type. */
744 bool is_pointer_type (type *pointer);
747 * @page primitive_type Representation of a primitive type
749 * Primitive types are types that represent indivisible data values that
750 * map directly to modes. They don't have a private attribute. The
751 * important information they carry is held in the common mode field.
753 /** Creates a new primitive type. */
754 type *new_type_primitive (ident *name, ir_mode *mode);
756 /** Creates a new primitive type with debug information. */
757 type *new_d_type_primitive (ident *name, ir_mode *mode, dbg_info* db);
759 /** Returns true if a type is a primitive type. */
760 bool is_primitive_type (type *primitive);
764 * Checks whether a type is atomic.
765 * @param tp - any type
766 * @return true if type is primitive, pointer or enumeration
768 int is_atomic_type(type *tp);
770 /* --- Support for compound types --- */
773 * Gets the number of elements in a firm compound type.
775 * This is just a comforability function, because structs and
776 * classes can often be treated be the same code, but they have
777 * different access functions to their members.
779 * @param tp The type (must be struct, union or class).
781 * @return Number of members in the compound type.
783 int get_compound_n_members(type *tp);
786 * Gets the member of a firm compound type at position pos.
788 * @param tp The type (must be struct, union or class).
789 * @param pos The number of the member.
791 * @return The member entity at position pos.
793 * @see get_compound_n_members() for justifaction of existence.
795 entity *get_compound_member(type *tp, int pos);
798 * Checks whether a type is compound.
800 * @param tp - any type
802 * @return true if the type is class, structure, union or array type.
804 int is_compound_type(type *tp);
807 /** Outputs a unique number for this type if libfirm is compiled for
808 debugging, (configure with --enable-debug) else returns 0. */
809 INLINE long get_type_nr(type *tp);
811 # endif /* _TYPE_H_ */