type.h 34.9 KB
Newer Older
Sebastian Felis's avatar
Sebastian Felis committed
1
/**
2
 *
Götz Lindenmaier's avatar
header    
Götz Lindenmaier committed
3
 * @file type.h
Michael Beck's avatar
Michael Beck committed
4
 *
Götz Lindenmaier's avatar
header    
Götz Lindenmaier committed
5
6
7
8
9
10
11
12
13
 * Project:     libFIRM                                                   <br>
 * File name:   ir/tr/type.h                                              <br>
 * Purpose:     Representation of types.                                  <br>
 * Author:      Goetz Lindenmaier                                         <br>
 * Modified by:                                                           <br>
 * Created:                                                               <br>
 * Copyright:   (c) 2001-2003 Universität Karlsruhe                       <br>
 * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE. <br>
 * CVS-ID:      $Id$
Michael Beck's avatar
Michael Beck committed
14
 *
Götz Lindenmaier's avatar
header    
Götz Lindenmaier committed
15
16
 *
 *  Datastructure to hold type information.
17
18
19
20
21
 *
 *  This module supplies a datastructure to represent all types
 *  known in the compiled program.  This includes types specified
 *  in the program as well as types defined by the language.  In the
 *  view of the intermediate representation there is no difference
22
 *  between these types.  Finally it specifies some auxiliary types.
23
24
25
26
27
28
29
30
31
32
 *
 *  There exist several kinds of types, arranged by the structure of
 *  the type.  A type is described by a set of attributes.  Some of
 *  these attributes are common to all types, others depend on the
 *  kind of the type.
 *
 *  Types are different from the modes defined in irmode:  Types are
 *  on the level of the programming language, modes at the level of
 *  the target processor.
 *
33
 *  @see  tpop.h
34
 */
Boris Boesler's avatar
Boris Boesler committed
35

Christian Schäfer's avatar
Christian Schäfer committed
36
37
38
# ifndef _TYPE_H_
# define _TYPE_H_

Götz Lindenmaier's avatar
header    
Götz Lindenmaier committed
39
40
# include <stdbool.h>

41
# include "tpop.h"
42
# include "firm_common.h"
Christian Schäfer's avatar
Christian Schäfer committed
43
44
# include "ident.h"
# include "irmode.h"
45
# include "dbginfo.h"
Christian Schäfer's avatar
Christian Schäfer committed
46

Götz Lindenmaier's avatar
a    
Götz Lindenmaier committed
47

48
/* to resolve recursion between entity.h and type.h */
Christian Schäfer's avatar
Christian Schäfer committed
49
50
51
52
#ifndef _ENTITY_TYPEDEF_
#define _ENTITY_TYPEDEF_
typedef struct entity entity;
#endif
Christian Schäfer's avatar
Christian Schäfer committed
53

54
55
56
57
58
#ifndef _IR_NODE_TYPEDEF_
#define _IR_NODE_TYPEDEF_
typedef struct ir_node ir_node;
#endif

Sebastian Felis's avatar
Sebastian Felis committed
59
/**
Michael Beck's avatar
Michael Beck committed
60
 *  An abstract data type to represent types.
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
 *
 *  This is the abstract data type with which any type known in the
 *  compiled program can be represented.  This includes types specified
 *  in the program as well as types defined by the language.  In the
 *  view of the intermediate representation there is no difference
 *  between these types.
 *
 *  There exist several kinds of types, arranged by the structure of
 *  the type.  These are distinguished by a type opcode.
 *  A type is described by a set of attributes.  Some of these attributes
 *  are common to all types, others depend on the kind of the type.
 *
 *  The following describes the common attributes.  They can only be
 *  accessed by the functions given below.
 *
Michael Beck's avatar
Michael Beck committed
76
 *  The common fields are:
77
 *
78
 *  - firm_kind: A firm_kind tag containing k_type.  This is useful
79
 *               for dynamically checking whether a node is a type node.
80
81
82
 *  - type_op:   A tp_op specifying the kind of the type.
 *  - mode:      The mode to be used to represent the type on a machine.
 *  - name:      An identifier specifying the name of the type.  To be
83
 *               set by the frontend.
84
 *  - size:      The size of the type, i.e. an entity of this type will
85
86
87
 *               occupy size bytes in memory.  In several cases this is
 *               determined when fixing the layout of this type (class,
 *               struct, union, array, enumeration).
88
 *  - state:     The state of the type.  The state represents whether the
Götz Lindenmaier's avatar
Götz Lindenmaier committed
89
90
91
92
93
94
95
96
 *               layout of the type is undefined or fixed (values: layout_undefined
 *               or layout_fixed).  Compound types can have an undefined
 *               layout.  The layout of the basic types primitive and pointer
 *               is always layout_fixed.  If the layout of
 *               compound types is fixed all entities must have an offset
 *               and the size of the type must be set.
 *               A fixed layout for enumeration types means that each enumeration
 *               is associated with an implementation value.
97
98
 *  - visit:     A counter for walks of the type information.
 *  - link:      A void* to associate some additional information with the type.
99
 *
Michael Beck's avatar
Michael Beck committed
100
 *  These fields can only be accessed via access functions.
101
 *
102
 *  Depending on the value of @c type_op, i.e., depending on the kind of the
Michael Beck's avatar
Michael Beck committed
103
 *  type the adt contains further attributes.  These are documented below.
104
105
106
107
108
109
110
111
112
113
 *
 *  @see
 *
 *  @link class_type class @endlink, @link struct_type struct @endlink,
 *  @link method_type method @endlink, @link union_type union @endlink,
 *  @link array_type array @endlink, @link enumeration_type enumeration @endlink,
 *  @link pointer_type pointer @endlink, @link primitive_type primitive @endlink
 *
 *  @todo
 *  	mode maybe not global field??
114
 */
115
116
#ifndef _TYPE_TYPEDEF_
#define _TYPE_TYPEDEF_
117
typedef struct type type;
118
#endif
119

Götz Lindenmaier's avatar
a    
Götz Lindenmaier committed
120
121
# include "type_or_entity.h"

122
123
124
125
126
127
/** frees all entities associated with a type.
    Does not free array entity.
    Warning: make sure these entities are not referenced anywhere else.
*/
void        free_type_entities(type *tp);

Michael Beck's avatar
Michael Beck committed
128
/** Frees the memory used by the type.   Does not free the entities
129
130
131
132
    belonging to the type, except for the array element entity.
    Does not free if tp is "none" or "unknown".
    Frees entities in value param subtypes of method types!!! Make sure these
    are not referenced any more. */
133
134
void        free_type(type *tp);

135
136
137
138
139
tp_op*      get_type_tpop(type *tp);
ident*      get_type_tpop_nameid(type *tp);
const char* get_type_tpop_name(type *tp);
tp_opcode   get_type_tpop_code(type *tp);

140
141
ident*      get_type_ident(type *tp);
void        set_type_ident(type *tp, ident* id);
142
143
const char* get_type_name(type *tp);

144
/** The state of the type layout. */
145
typedef enum {
Michael Beck's avatar
Michael Beck committed
146
  layout_undefined,    /**< The layout of this type is not defined.
147
			  Address computation to access fields is not
148
149
150
			  possible, fields must be accessed by Sel
			  nodes.  This is the default value except for
			  pointer, primitive and method types. */
Michael Beck's avatar
Michael Beck committed
151
  layout_fixed         /**< The layout is fixed, all component/member entities
152
153
			  have an offset assigned.  Size of the type is known.
			  Arrays can be accessed by explicit address
154
			  computation. Default for pointer, primitive and method
155
			  types.  */
156
} type_state;
157
158

/** Returns the type layout state of a type. */
159
type_state  get_type_state(type *tp);
160
161
162
163
164
165

/** Sets the type layout state of a type.
 *
 * For primitives, pointer and method types the layout is always fixed.
 * This call is legal but has no effect.
 */
166
167
void        set_type_state(type *tp, type_state state);

168
169
170
171
/** Returns the mode of a type.
 *
 * Returns NULL for all non atomic types.
 */
172
ir_mode*    get_type_mode(type *tp);
173
174
175

/** Sets the mode of a type.
 *
176
 * Only has an effect on primitive, enumeration and pointer types.
177
 */
178
179
void        set_type_mode(type *tp, ir_mode* m);

180
/** Returns the size of a type. */
181
int         get_type_size(type *tp);
182
183
184
185
186
187

/** Sets the size of a type.
 *
 * For primitive, enumeration, pointer and method types the size
 * is always fixed. This call is legal but has no effect.
 */
188
189
190
void        set_type_size(type *tp, int size);


191
unsigned long get_type_visited(type *tp);
192
void          set_type_visited(type *tp, unsigned long num);
193
/* Sets visited field in type to type_visited. */
194
void          mark_type_visited(type *tp);
195
196
/* @@@ name clash!! int           type_visited(type *tp); */
int           type_not_visited(type *tp);
197

198
199
void*         get_type_link(type *tp);
void          set_type_link(type *tp, void *l);
200

Sebastian Felis's avatar
Sebastian Felis committed
201
/**
202
203
204
205
206
207
208
 * Visited flag to traverse the type information.
 *
 * Increase this flag by one before traversing the type information.
 * Mark type nodes as visited by set_type_visited(type, type_visited).
 * Check whether node was already visited by comparing get_type_visited(type)
 * and type_visited.
 * Or use the function to walk all types.
209
 *
Sebastian Felis's avatar
Sebastian Felis committed
210
 * @see  typewalk
211
 */
Christian Schäfer's avatar
Christian Schäfer committed
212
extern unsigned long type_visited;
213
void          set_master_type_visited(unsigned long val);
214
215
unsigned long get_master_type_visited(void);
void          inc_master_type_visited(void);
Sebastian Felis's avatar
Sebastian Felis committed
216
217

/**
218
 * Checks whether a pointer points to a type.
Sebastian Felis's avatar
Sebastian Felis committed
219
 *
220
 * @param thing     an arbitrary pointer
Sebastian Felis's avatar
Sebastian Felis committed
221
 *
222
223
 * @return
 *     true if the thing is a type, else false
224
225
 */
int is_type            (void *thing);
Christian Schäfer's avatar
Christian Schäfer committed
226

Sebastian Felis's avatar
Sebastian Felis committed
227
228
/**
 *   Checks whether two types are structural equal.
Michael Beck's avatar
Michael Beck committed
229
230
231
232
233
234
 *
 *   @param st pointer type
 *   @param lt pointer type
 *
 *   @return
 *    true if the types are equal, else false.
235
 *    Types are equal if :
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
 *    - they are the same type kind
 *    - they have the same name
 *    - they have the same mode (if applicable)
 *    - they have the same type_state and, ev., the same size
 *    - they are class types and have
 *      - the same members (see same_entity in entity.h)
 *      - the same supertypes -- the C-pointers are compared --> no recursive call.
 *      - the same number of subtypes.  Subtypes are not compared,
 *        as this could cause a cyclic test.
 *      - the same peculiarity
 *    - they are structure types and have the same members
 *    - they are method types and have
 *      - the same parameter types
 *      - the same result types
 *    - they are union types and have the same members
 *    - they are array types and have
 *      - the same number of dimensions
 *      - the same dimension bounds
 *      - the same dimension order
 *      - the same element type
 *    - they are enumeration types and have the same enumerator names
 *    - they are pointer types and have the identical points_to type
 *      (i.e., the same C-struct to represent the type, type_id is skipped.
 *       This is to avoid endless recursions; with pointer types circlic
 *       type graphs are possible.)
 */
bool equal_type(type *tpy1, type *typ2);

Sebastian Felis's avatar
Sebastian Felis committed
264
265
/**
 *   Checks whether two types are structural comparable.
Michael Beck's avatar
Michael Beck committed
266
267
268
269
270
271
272
273
 *
 *   @param st pointer type
 *   @param lt pointer type
 *
 *   @return
 *    true if type st is smaller than type lt, i.e. whenever
 *    lt is expected a st can be used.
 *    This is true if
274
275
276
277
278
279
280
281
282
283
284
 *    - they are the same type kind
 *    - mode(st) < mode (lt)  (if applicable)
 *    - they are class types and st is (transitive) subtype of lt,
 *    - they are structure types and
 *       - the members of st have exactly one counterpart in lt with the same name,
 *       - the counterpart has a bigger type.
 *    - they are method types and have
 *      - the same number of parameter and result types,
 *      - the parameter types of st are smaller than those of lt,
 *      - the result types of st are smaller than those of lt
 *    - they are union types and have the members of st have exactly one
Sebastian Felis's avatar
Sebastian Felis committed
285
 *      @return counterpart in lt and the type is smaller
286
287
288
289
290
 *    - they are array types and have
 *      - the same number of dimensions
 *      - all bounds of lt are bound of st
 *      - the same dimension order
 *      - the same element type
Sebastian Felis's avatar
Sebastian Felis committed
291
 *      @return or
292
293
294
295
 *      - the element type of st is smaller than that of lt
 *      - the element types have the same size and fixed layout.
 *    - they are enumeration types and have the same enumerator names
 *    - they are pointer types and have the points_to type of st is
Sebastian Felis's avatar
Sebastian Felis committed
296
297
 *      @return smaller than the points_to type of lt.
 *
298
299
300
 */
bool smaller_type (type *st, type *lt);

Sebastian Felis's avatar
Sebastian Felis committed
301
/**
302
303
 *  @page class_type	Representation of a class type
 *
304
305
306
307
 *  If the type opcode is set to type_class the type represents class
 *  types.  A list of fields and methods is associated with a class.
 *  Further a class can inherit from and bequest to other classes.
 *  @@@ value class???
308
309
310
311
312
 *  The following attributes are private to this type kind:
 *  - member:     All entities belonging to this class.  This are methode entities
 *                which have type_method or fields that can have any of the
 *                following type kinds: type_class, type_struct, type_union,
 *                type_array, type_enumeration, type_pointer, type_primitive.
313
 *
314
315
 *  The following two are dynamic lists that can be grown with an "add_" function,
 *  but not shrinked:
316
 *
317
 *  - subtypes:   A list of direct subclasses.
318
 *
319
 *  - supertypes: A list of direct superclasses.
320
 *
321
322
323
324
325
326
327
328
 *  - peculiarity: The peculiarity of this class.  If the class is of peculiarity
 *                 "description" it only is a description of requirememts to a class,
 *                 as, e.g., a Java interface.  The class will never be allocated.
 *                 Peculiatity inherited is only possible for entities.  An entity
 *                 is of peculiarity inherited if the compiler generated the entity
 *                 to explicitly resolve inheritance.  An inherited method entity has
 *                 no value for irg.
 *                 Values: description, existent, inherited.  Default: existent.
329
 *
330
 */
331
332

/** Creates a new class type. */
333
type   *new_type_class (ident *name);
334
335

/** Creates a new class type with debug information. */
336
type   *new_d_type_class (ident *name, dbg_info *db);
337

338
339
340
/* --- manipulate private fields of class type  --- */

/** Adds the entity as member of the class.  */
341
void    add_class_member   (type *clss, entity *member);
342
343

/** Returns the number of members of this class. */
344
int     get_class_n_members (type *clss);
345
346

/** Returns the member at position pos, 0 <= pos < n_member */
347
entity *get_class_member   (type *clss, int pos);
348

Götz Lindenmaier's avatar
Götz Lindenmaier committed
349
350
/** Returns index of mem in clss, -1 if not contained. */
int     get_class_member_index(type *clss, entity *mem);
351

Götz Lindenmaier's avatar
Götz Lindenmaier committed
352
353
354
355
/** Finds the member with name 'name'. If several members with the same
    name returns one of them.  Returns NULL if no member found. */
entity *get_class_member_by_name(type *clss, ident *name);

356
/** Overwrites the member at position pos, 0 <= pos < n_member with
357
   the passed entity. */
358
void    set_class_member   (type *clss, entity *member, int pos);
359
360
361

/** Replaces complete member list in class type by the list passed.
   Copies the list passed. This function is necessary to reduce the number of members.
Götz Lindenmaier's avatar
a    
Götz Lindenmaier committed
362
363
   members is an array of entities, num the size of this array.  Sets all
   owners of the members passed to clss. */
364
void    set_class_members  (type *clss, entity *members[], int arity);
365
366

/** Finds member in the list of members and removes it.
367
368
   Shrinks the member list, so iterate from the end!!!
   Does not deallocate the entity.  */
369
void    remove_class_member(type *clss, entity *member);
370

371

372
/** Adds subtype as subtype to clss.
Götz Lindenmaier's avatar
Götz Lindenmaier committed
373
374
   Checks whether clss is a supertype of subtype.  If not
   adds also clss as supertype to subtype.  */
375
void    add_class_subtype   (type *clss, type *subtype);
376
377

/** Returns the number of subtypes */
378
int     get_class_n_subtypes (type *clss);
379
380

/** Gets the subtype at position pos, 0 <= pos < n_subtype. */
381
type   *get_class_subtype   (type *clss, int pos);
382
383
384

/** Sets the subtype at positioin pos, 0 <= pos < n_subtype.
   Does not set the corresponding supertype relation for subtype: this might
385
   be a different position! */
386
void    set_class_subtype   (type *clss, type *subtype, int pos);
387
388

/** Finds subtype in the list of subtypes and removes it  */
389
390
void    remove_class_subtype(type *clss, type *subtype);

391

392
/** Adds supertype as supertype to class.
Götz Lindenmaier's avatar
Götz Lindenmaier committed
393
394
   Checks whether clss is a subtype of supertype.  If not
   adds also clss as subtype to supertype.  */
395
void    add_class_supertype   (type *clss, type *supertype);
396
397

/** Returns the number of supertypes */
398
int     get_class_n_supertypes (type *clss);
399
400

/** Returns the index of an supertype in a type. */
Götz Lindenmaier's avatar
Götz Lindenmaier committed
401
int     get_class_supertype_index(type *clss, type *super_clss);
402
403

/** Gets the supertype at position pos,  0 <= pos < n_supertype. */
404
type   *get_class_supertype   (type *clss, int pos);
405
406
407

/** Sets the supertype at postition pos, 0 <= pos < n_subtype.
   Does not set the corresponding subtype relation for supertype: this might
408
   be a different position! */
409
void    set_class_supertype   (type *clss, type *supertype, int pos);
410
411

/** Finds supertype in the list of supertypes and removes it */
412
void    remove_class_supertype(type *clss, type *supertype);
413

Michael Beck's avatar
Michael Beck committed
414
/** This enumeration flags the peculiarity of entities and types. */
Götz Lindenmaier's avatar
Götz Lindenmaier committed
415
typedef enum peculiarity {
416
  peculiarity_description,     /**< Represents only a description.  The entity/type is never
Götz Lindenmaier's avatar
Götz Lindenmaier committed
417
418
	  	                    allocated, no code/data exists for this entity/type.
			            @@@ eventually rename to descriptive (adjectiv as the others!)*/
419
420
421
422
423
  peculiarity_inherited,       /**< Describes explicitly that other entities are
 		                    inherited to the owner of this entity.
 		                    Overwrites must refer to at least one other
 		                    entity.  If this is a method entity there exists
 		                    no irg for this entity, only for one of the
Götz Lindenmaier's avatar
Götz Lindenmaier committed
424
425
 		                    overwritten ones.
			            Only for entity. */
Götz Lindenmaier's avatar
Götz Lindenmaier committed
426
427
428
  peculiarity_existent         /**< The entity/type (can) exist.
				    @@@ eventually rename to 'real' i.e., 'echt'
			            This serves better as opposition to description _and_ inherited.*/
429
} peculiarity;
Götz Lindenmaier's avatar
Götz Lindenmaier committed
430
char *get_peculiarity_string(peculiarity p);
431
432
433

/* The peculiarity of the class.  The enumeration peculiarity is defined
   in entity.h */
434
435
peculiarity get_class_peculiarity (type *clss);
void        set_class_peculiarity (type *clss, peculiarity pec);
436

437
/* Set and get a class' dfn --
Michael Beck's avatar
Michael Beck committed
438
   @todo This is an undocumented field, subject to change! */
439
440
void set_class_dfn (type *clss, int dfn);
int  get_class_dfn (type *clss);
441

442
/** Returns true if a type is a class type. */
443
int is_class_type(type *clss);
444
445

/** Returns true if low is subclass of high. */
446
bool is_subclass_of(type *low, type *high);
447

Sebastian Felis's avatar
Sebastian Felis committed
448
/**
449
450
 *  @page struct_type	Representation of a struct type
 *
451
452
 *  Type_strct represents aggregate types that consist of a list
 *  of fields.
453
454
455
456
457
458
459
460
461
 *  The following attributes are private to this type kind:
 *  - member:  All entities belonging to this class.  This are the fields
 *             that can have any of the following types:  type_class,
 *             type_struct, type_union, type_array, type_enumeration,
 *  	       type_pointer, type_primitive.
 *             This is a dynamic list that can be grown with an "add_" function,
 *             but not shrinked.
 *             This is a dynamic list that can be grown with an "add_" function,
 *             but not shrinked.
462
 */
463
/** Creates a new type struct */
464
type   *new_type_struct (ident *name);
465
/** Creates a new type struct with debug information. */
466
type   *new_d_type_struct (ident *name, dbg_info* db);
467

468
469
470
/* --- manipulate private fields of struct --- */

/** Adds the entity as member of the struct.  */
471
void    add_struct_member   (type *strct, entity *member);
472
473

/** Returns the number of members of this struct. */
474
int     get_struct_n_members (type *strct);
475
476

/** Returns the member at position pos, 0 <= pos < n_member */
477
entity *get_struct_member   (type *strct, int pos);
478
479
480
481
482
483

/** Returns index of member in strct, -1 if not contained. */
int     get_struct_member_index(type *strct, entity *member);

/** Overwrites the member at position pos, 0 <= pos < n_member with
   the passed entity. */
484
void    set_struct_member   (type *strct, int pos, entity *member);
485
486

/** Finds member in the list of members and removes it. */
487
void    remove_struct_member (type *strct, entity *member);
488

489
/** Returns true if a type is a struct type. */
490
int     is_struct_type(type *strct);
491

Sebastian Felis's avatar
Sebastian Felis committed
492
/**
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
 * @page method_type	Representation of a method type
 *
 * A method type represents a method, function or procedure type.
 * It contains a list of the parameter and result types, as these
 * are part of the type description.  These lists should not
 * be changed by a optimization, as a change creates a new method
 * type.  Therefore optimizations should allocated new method types.
 * The set_ routines are only for construction by a frontend.
 *
 * - n_params:   Number of parameters to the procedure.
 *               A procedure in FIRM has only call by value parameters.
 *
 * - param_type: A list with the types of parameters.  This list is ordered.
 *               The nth type in this list corresponds to the nth element
 *               in the parameter tuple that is a result of the start node.
 *               (See ircons.h for more information.)
 *
510
511
512
513
 * - value_param_ents
 *               A list of entities (whose owner is a struct private to the
 *               method type) that represent parameters passed by value.
 *
514
515
516
517
518
519
 * - n_res:      The number of results of the method.  In general, procedures
 *               have zero results, functions one.
 *
 * - res_type:   A list with the types of parameters.  This list is ordered.
 *               The nth type in this list corresponds to the nth input to
 *               Return nodes.  (See ircons.h for more information.)
520
521
522
523
 *
 * - value_res_ents
 *               A list of entities (whose owner is a struct private to the
 *               method type) that represent results passed by value.
524
525
 */

526
527
528
529
530
/* These makros define the suffixes for the types and entities used
   to represent value parameters / results. */
#define VALUE_PARAMS_SUFFIX  "val_param"
#define VALUE_RESS_SUFFIX    "val_res"

Michael Beck's avatar
Michael Beck committed
531
532
/** Create a new method type.
 *
533
534
535
536
537
538
539
 * @param name      the name (ident) of this type
 * @param n_param   the number of parameters
 * @param n_res     the number of results
 *
 * The arrays for the parameter and result types are not initialized by
 * the constructor.
 */
540
type *new_type_method (ident *name, int n_param, int n_res);
541
542
543
544
545
546
547
548
549
550
551

/** Create a new method type with debug information.
 *
 * @param name      the name (ident) of this type
 * @param n_param   the number of parameters
 * @param n_res     the number of results
 * @param db        user defined debug information
 *
 * The arrays for the parameter and result types are not initialized by
 * the constructor.
 */
552
type *new_d_type_method (ident *name, int n_param, int n_res, dbg_info* db);
553

554
555
556
/* -- manipulate private fields of method. -- */

/** Returns the number of parameters of this method. */
557
int   get_method_n_params  (type *method);
558
559

/** Returns the type of the parameter at position pos of a method. */
560
type *get_method_param_type(type *method, int pos);
561
562
563
/** Sets the type of the parameter at position pos of a method.
    Also changes the type in the pass-by-value representation by just
    changing the type of the corresponding entity if the representation is constructed. */
564
void  set_method_param_type(type *method, int pos, type* tp);
565
/** Returns an entity that represents the copied value argument.  Only necessary
566
567
   for compounds passed by value. This information is constructed only on demand. */
entity *get_method_value_param_ent(type *method, int pos);
568
569
570
571
/**
 * Returns a type that represents the copied value arguments.
 */
type *get_method_value_param_type(type *method);
572

573
int   get_method_n_ress   (type *method);
574
type *get_method_res_type(type *method, int pos);
575
576
577
/** Sets the type of the result at position pos of a method.
    Also changes the type in the pass-by-value representation by just
    changing the type of the corresponding entity if the representation is constructed. */
578
void  set_method_res_type(type *method, int pos, type* tp);
579
/** Returns an entity that represents the copied value result.  Only necessary
580
581
   for compounds passed by value. This information is constructed only on demand. */
entity *get_method_value_res_ent(type *method, int pos);
582
583
/**
 * Returns a type that represents the copied value results.
Götz Lindenmaier's avatar
Götz Lindenmaier committed
584
585
 */
type *get_method_value_res_type(type *method);
586

Michael Beck's avatar
Michael Beck committed
587
/**
588
589
590
591
592
 * this enum flags the variadicity of methods (methods with a
 * variable amount of arguments (e.g. C's printf). Default is
 * non_variadic.
 */
typedef enum variadicity {
Michael Beck's avatar
Michael Beck committed
593
594
  variadicity_non_variadic,	/**< non variadic */
  variadicity_variadic		/**< variadic */
595
596
} variadicity;

Michael Beck's avatar
Michael Beck committed
597
598
599
/** Returns the null-terminated name of this variadicity. */
const char *get_variadicity_name(variadicity vari);

600
/** Returns the variadicity of a method. */
601
variadicity get_method_variadicity(type *method);
602
603

/** Sets the variadicity of a method. */
604
605
void set_method_variadicity(type *method, variadicity vari);

606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
/**
 * Returns the first variadic parameter index of a type.
 * If this index was NOT set, the index of the last parameter
 * of the method type plus one is returned for variadic functions.
 * Non-variadic function types always return -1 here.
 */
int get_method_first_variadic_param_index(type *method);

/**
 * Sets the first variadic parameter index. This allows to specify
 * a complete call type (containing the type of all parameters)
 * but still have the knowledge, which parameter must be passed as
 * variadic one.
 */
void set_method_first_variadic_param_index(type *method, int index);

622
/** Returns true if a type is a method type. */
623
int   is_method_type     (type *method);
624

Sebastian Felis's avatar
Sebastian Felis committed
625
/**
626
627
 *   @page union_type	Representation of a union type.
 *
628
 *   The union type represents union types.
629
630
 *   - n_types:     Number of unioned types.
 *   - members:     Entities for unioned types.  Fixed length array.
631
632
 *                  This is a dynamic list that can be grown with an "add_" function,
 *                  but not shrinked.
633
 */
634
/** Creates a new type union. */
635
type   *new_type_union (ident *name);
636
637

/** Creates a new type union with debug information. */
638
type   *new_d_type_union (ident *name, dbg_info* db);
639

640
641
642
/* --- manipulate private fields of struct --- */

/** Returns the number of unioned types of this union */
643
int     get_union_n_members      (type *uni);
644
645

/** Adds a new entity to a union type */
646
void    add_union_member (type *uni, entity *member);
647
648

/** Returns the entity at position pos of a union */
649
entity *get_union_member (type *uni, int pos);
650
651

/** Overwrites a entity at position pos in a union type. */
652
void    set_union_member (type *uni, int pos, entity *member);
653
654

/** Finds member in the list of members and removes it. */
655
void    remove_union_member (type *uni, entity *member);
656

657
/** Returns true if a type is a union type. */
658
int     is_union_type          (type *uni);
659

Sebastian Felis's avatar
Sebastian Felis committed
660
/**
661
662
663
664
665
666
667
668
669
670
671
672
673
 * @page array_type	Representation of an array type
 *
 * The array type represents rectangular multi dimensional arrays.
 * The constants representing the bounds must be allocated to
 * get_const_code_irg() by setting current_ir_graph accordingly.
 *
 * - n_dimensions:    Number of array dimensions.
 * - *lower_bound:    Lower bounds of dimensions.  Usually all 0.
 * - *upper_bound:    Upper bounds or dimensions.
 * - *element_type:   The type of the array elements.
 * - *element_ent:    An entity for the array elements to be used for
 *                      element selection with Sel.
 * @todo
Michael Beck's avatar
Michael Beck committed
674
675
 *   Do we need several entities?  One might want
 *   to select a dimension and not a single element in case of multidim arrays.
676
 */
677
678
679
680
681
682
683
684

/** Create a new type array.
 *
 * Sets n_dimension to dimension and all dimension entries to NULL.
 * Initializes order to the order of the dimensions.
 * The entity for array elements is built automatically.
 * Set dimension sizes after call to constructor with set_* routines.
 */
685
type *new_type_array         (ident *name, int n_dimensions,
686
			      type *element_type);
687
688
689
690
691
692
693
694

/** Create a new type array with debug information.
 *
 * Sets n_dimension to dimension and all dimension entries to NULL.
 * Initializes order to the order of the dimensions.
 * The entity for array elements is built automatically.
 * Set dimension sizes after call to constructor with set_* routines.
 */
695
696
type *new_d_type_array         (ident *name, int n_dimensions,
			      type *element_type, dbg_info* db);
697

698
699
700
/* --- manipulate private fields of array type --- */

/** Returns the number of array dimensions of this type. */
701
int   get_array_n_dimensions (type *array);
702
703

/** Allocates Const nodes of mode_I for the array dimensions */
704
705
void  set_array_bounds_int   (type *array, int dimension, int lower_bound,
                                                          int upper_bound);
706
707
708
void  set_array_bounds       (type *array, int dimension, ir_node *lower_bound,
                                                          ir_node *upper_bound);
void  set_array_lower_bound  (type *array, int dimension, ir_node *lower_bound);
709
void  set_array_lower_bound_int (type *array, int dimension, int lower_bound);
710
void  set_array_upper_bound  (type *array, int dimension, ir_node *upper_bound);
711
void  set_array_upper_bound_int (type *array, int dimension, int lower_bound);
712
/* returns true if lower bound != Unknown */
713
int       has_array_lower_bound  (type *array, int dimension);
714
ir_node * get_array_lower_bound  (type *array, int dimension);
715
int       has_array_upper_bound  (type *array, int dimension);
716
ir_node * get_array_upper_bound  (type *array, int dimension);
717

Götz Lindenmaier's avatar
a    
Götz Lindenmaier committed
718
719
720
void set_array_order (type *array, int dimension, int order);
int  get_array_order (type *array, int dimension);

721
void  set_array_element_type (type *array, type *tp);
722
723
type *get_array_element_type (type *array);

724
725
726
void  set_array_element_entity (type *array, entity *ent);
entity *get_array_element_entity (type *array);

727
/** Returns true if a type is an array type. */
728
int    is_array_type(type *array);
729

Sebastian Felis's avatar
Sebastian Felis committed
730
/**
731
 * @page enumeration_type	Representation of an enumeration type
732
 *
733
734
735
736
737
738
739
740
741
742
 * Enumeration types need not necessarily be represented explicitly
 * by Firm types, as the frontend can lower them to integer constants as
 * well.  For debugging purposes or similar tasks this information is useful.
 *
 * - *enum:         The target values representing the constants used to
 *                  represent individual enumerations.
 * - *enum_nameid:  Idents containing the source program name of the enumeration
 *  	     constants
 */
/** Create a new type enumeration -- set the enumerators independently. */
743
type   *new_type_enumeration    (ident *name, int n_enums);
744
745

/** Create a new type enumeration with debug information -- set the enumerators independently. */
746
type   *new_d_type_enumeration    (ident *name, int n_enums, dbg_info* db);
747

748
749
750
/* --- manipulate fields of enumeration type. --- */

/** Returns the number of enumeration values of this enumeration */
751
752
int     get_enumeration_n_enums (type *enumeration);

753
/** Sets the enumeration value at a given position. */
754
void    set_enumeration_enum    (type *enumeration, int pos, tarval *con);
755
756

/** Returns the enumeration value at a given position. */
757
758
tarval *get_enumeration_enum    (type *enumeration, int pos);

759
/** Assign an ident to an enumeration value at a given position. */
760
void    set_enumeration_nameid  (type *enumeration, int pos, ident *id);
761
762

/** Returns the assigned ident of an enumeration value at a given position. */
763
ident  *get_enumeration_nameid  (type *enumeration, int pos);
764
765

/** Returns the assigned name of an enumeration value at a given position. */
766
767
const char *get_enumeration_name(type *enumeration, int pos);

768
/** Returns true if a type is a enumeration type. */
769
int     is_enumeration_type     (type *enumeration);
770

Sebastian Felis's avatar
Sebastian Felis committed
771
/**
772
773
 * @page pointer_type	Representation of a pointer type
 *
774
775
 * The mode of the pointer type must be a mode_reference.
 *
776
777
 * Pointer types:
 * - points_to:      The type of the entity this pointer points to.
778
 */
Christian Schäfer's avatar
Christian Schäfer committed
779

780
/** Creates a new type pointer with mode mode_p. */
781
#define new_type_pointer(N, P) new_type_pointer_mode(N, P, mode_P_mach)
782
783
784
785
786
787

/** Creates a new type pointer with given pointer mode. */
type *new_type_pointer_mode      (ident *name, type *points_to, ir_mode *ptr_mode);

/** Creates a new type pointer given pointer mode and with debug information. */
type *new_d_type_pointer         (ident *name, type *points_to, ir_mode *ptr_mode, dbg_info* db);
788
789
790
791

/* --- manipulate fields of type_pointer --- */

/** Sets the type to which a pointer points to. */
792
void  set_pointer_points_to_type (type *pointer, type *tp);
793
794

/** Returns the type to which a pointer points to. */
795
796
type *get_pointer_points_to_type (type *pointer);

797
/** Returns true if a type is a pointer type. */
798
int   is_pointer_type            (type *pointer);
799

800
801
802
803
804
/** Returns the first pointer type that has as points_to tp.
 *  Not efficient: O(#types).
 *  If not found returns unknown_type. */
type *find_pointer_type_to_type (type *tp);

Sebastian Felis's avatar
Sebastian Felis committed
805
/**
806
807
808
809
810
 * @page primitive_type Representation of a primitive type
 *
 * Primitive types are types that represent indivisible data values that
 * map directly to modes.  They don't have a private attribute.  The
 * important information they carry is held in the common mode field.
Christian Schäfer's avatar
Christian Schäfer committed
811
*/
812
/** Creates a new primitive type. */
813
type *new_type_primitive (ident *name, ir_mode *mode);
814
815

/** Creates a new primitive type with debug information. */
816
type *new_d_type_primitive (ident *name, ir_mode *mode, dbg_info* db);
Christian Schäfer's avatar
Christian Schäfer committed
817

818
/** Returns true if a type is a primitive type. */
819
int  is_primitive_type  (type *primitive);
Christian Schäfer's avatar
Christian Schäfer committed
820

821

822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
/**
 * @page none_type
 *
 *  This type is an auxiliary type dedicated to support type analyses.
 *
 *  The none type represents that there is no type.  The type can be used to
 *  initialize fields of type* that actually can not contain a type or that
 *  are initialized for an analysis. There exists exactly one type none.
 *  This type is not on the type list in ir_prog. It is
 *  allocated when initializing the type module.
 *
 *  The following values are set:
 *    mode:  mode_BAD
 *    name:  "type_none"
 *    state: layout_fixed
 *    size:  0
 */
/* A variable that contains the only none type. */
extern type *none_type;
/* Returns the none type */
type *get_none_type(void);

/**
 * @page unknown_type
 *
 *  This type is an auxiliary type dedicated to support type analyses.
 *
 *  The unknown type represents that there could be a type, but it is not
 *  known.  This type 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 type unknown. This type is not on the type list in ir_prog.  It is
 *  allocated when initializing the type module.
 *
 *  The following values are set:
 *    mode:  mode_ANY
 *    name:  "type_unknown"
 *    state: layout_fixed
 *    size:  0
 */
/* A variable that contains the only unknown type. */
extern type *unknown_type;
/* Returns the none type */
type *get_unknown_type(void);


Sebastian Felis's avatar
Sebastian Felis committed
867
/**
868
869
870
 *  Checks whether a type is atomic.
 *  @param tp - any type
 *  @return true if type is primitive, pointer or enumeration
871
872
873
 */
int is_atomic_type(type *tp);

874
875
/* --- Support for compound types --- */

Sebastian Felis's avatar
Sebastian Felis committed
876
/**
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
 * Gets the number of elements in a firm compound type.
 *
 * This is just a comforability function, because structs and
 * classes can often be treated be the same code, but they have
 * different access functions to their members.
 *
 * @param tp  The type (must be struct, union or class).
 *
 * @return Number of members in the compound type.
 */
int get_compound_n_members(type *tp);

/**
 * Gets the member of a firm compound type at position pos.
 *
 * @param tp  The type (must be struct, union or class).
 * @param pos The number of the member.
 *
 * @return The member entity at position pos.
 *
 * @see get_compound_n_members() for justifaction of existence.
 */
entity *get_compound_member(type *tp, int pos);

/**
 *  Checks whether a type is compound.
 *
 *  @param tp - any type
 *
 *  @return true if the type is class, structure, union or array type.
907
908
909
 */
int is_compound_type(type *tp);

910

911
912
913
914
915
/**
 *  Outputs a unique number for this type if libfirm is compiled for
 *  debugging, (configure with --enable-debug) else returns the address
 *  of the type cast to long.
 */
916
long get_type_nr(type *tp);
917

Götz Lindenmaier's avatar
Götz Lindenmaier committed
918
919
920
921
922
923
924
925
926
927
928
929
/*******************************************************************/
/** Debug aides                                                   **/
/*******************************************************************/


/** Write the type and all its attributes to stdout.
 *
 *  Writes the type and all its attributes to stdout if DEBUG_libfirm
 *  is set.  Else does nothing. */
void    dump_type (type *tp);


Christian Schäfer's avatar
Christian Schäfer committed
930
# endif /* _TYPE_H_ */