2 * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 #ifndef FIRM_TYPEREP_H
20 #define FIRM_TYPEREP_H
22 #include "firm_types.h"
25 * @page entity Entity representation
27 * An entity is the representation of program known objects in Firm.
28 * The primary concept of entities is to represent members of complex
29 * types, i.e., fields and methods of classes. As not all programming
30 * language model all variables and methods as members of some class,
31 * the concept of entities is extended to cover also local and global
32 * variables, and arbitrary procedures.
34 * An entity always specifies the type of the object it represents and
35 * the type of the object it is a part of, the owner of the entity.
36 * Originally this is the type of the class of which the entity is a
38 * The owner of local variables is the procedure they are defined in.
39 * The owner of global variables and procedures visible in the whole
40 * program is a universally defined class type "GlobalType". The owner
41 * of procedures defined in the scope of an other procedure is the
42 * enclosing procedure.
44 * The type ir_entity is an abstract data type to represent program entities.
45 * If contains the following attributes:
47 * - owner: A compound type this entity is a part of.
48 * - type: The type of this entity.
49 * - name: The string that represents this entity in the source program. * - allocation: A flag saying whether the entity is dynamically or statically * allocated (values: dynamic_allocated, static_allocated,
50 * automatic_allocated).
51 * - visibility: A flag indicating the visibility of this entity (values: local,
52 * external_visible, external_allocated)
53 * - variability: A flag indicating the variability of this entity (values:
54 * uninitialized, initialized, part_constant, constant)
56 * - offset: The offset of the entity within the compound object in bytes. Only set
57 * if the owner in the state "layout_fixed".
58 * - offset_bits_remainder: The offset bit remainder of a bitfield entity (in a compound)
59 * in bits. Only set if the owner in the state "layout_fixed".
60 * - overwrites: A list of entities overwritten by this entity. This list is only
61 * existent if the owner of this entity is a class. The members in
62 * this list must be entities of super classes.
63 * - overwrittenby: A list of entities that overwrite this entity. This list is only
64 * existent if the owner of this entity is a class. The members in
65 * this list must be entities of sub classes.
66 * - link: A void* to associate some additional information with the entity.
67 * - irg: If the entity is a method this is the ir graph that represents the
69 * - peculiarity: The peculiarity of the entity. If the entity is a method this
70 * indicates whether the entity represents
71 * a real method or whether it only exists to describe an interface.
72 * In that case there nowhere exists code for this entity and this entity
73 * is never dynamically used in the code.
74 * Values: description, existent. Default: existent.
75 * - visited: visited flag. Master flag is type_visited.
77 * These fields can only be accessed via access functions.
79 * @see ir_type, ir_entity
82 /** This enumeration flags the visibility of entities and types.
84 * This is necessary for partial compilation.
85 * We rely on the ordering of the flags.
88 visibility_local, /**< The entity is only visible locally. This is the default for
90 The type is only visible locally. All instances are allocated
91 locally, and no pointer to entities of this type are passed
92 out of this compilation unit. */
93 visibility_external_visible, /**< The entity is visible to other external program parts, but
94 it is defined here. It may not be optimized away. The entity must
96 For types: entities of this type can be accessed externally. No
97 instances of this type are allocated externally. */
98 visibility_external_allocated /**< The entity is defined and allocated externally. This compilation
99 must not allocate memory for this entity. The entity must
100 be static_allocated. This can also be an external defined
102 For types: entities of this type are allocated and accessed from
103 external code. Default for types. */
106 /** This enumeration flags the peculiarity of entities and types. */
108 peculiarity_description, /**< Represents only a description. The entity/type is never
109 allocated, no code/data exists for this entity/type.
110 @@@ eventually rename to descriptive (adjective as the others!)*/
111 peculiarity_inherited, /**< Describes explicitly that other entities are
112 inherited to the owner of this entity.
113 Overwrites must refer to at least one other
114 entity. If this is a method entity there exists
115 no irg for this entity, only for one of the
118 peculiarity_existent /**< The entity/type (can) exist.
119 @@@ eventually rename to 'real' i.e., 'echt'
120 This serves better as opposition to description _and_ inherited.*/
124 * Additional method type properties:
125 * Tell about special properties of a method type. Some
126 * of these may be discovered by analyses.
129 mtp_no_property = 0x00000000, /**< no additional properties, default */
130 mtp_property_const = 0x00000001, /**< This method did not access memory and calculates
131 its return values solely from its parameters.
132 GCC: __attribute__((const)). */
133 mtp_property_pure = 0x00000002, /**< This method did NOT write to memory and calculates
134 its return values solely from its parameters and
135 the memory they points to (or global vars).
136 GCC: __attribute__((pure)). */
137 mtp_property_noreturn = 0x00000004, /**< This method did not return due to an aborting system
139 GCC: __attribute__((noreturn)). */
140 mtp_property_nothrow = 0x00000008, /**< This method cannot throw an exception.
141 GCC: __attribute__((nothrow)). */
142 mtp_property_naked = 0x00000010, /**< This method is naked.
143 GCC: __attribute__((naked)). */
144 mtp_property_malloc = 0x00000020, /**< This method returns newly allocate memory.
145 GCC: __attribute__((malloc)). */
146 mtp_property_intrinsic = 0x00000040, /**< This method is intrinsic. It is expected that
147 a lowering phase will remove all calls to it. */
148 mtp_property_runtime = 0x00000080, /**< This method represents a runtime routine. */
149 mtp_property_private = 0x00000100, /**< All method invocations are known, the backend is free to
150 optimize the call in any possible way. */
151 mtp_property_inherited = (1<<31) /**< Internal. Used only in irg's, means property is
152 inherited from type. */
153 } mtp_additional_property;
156 * Creates a new entity.
158 * Automatically inserts the entity as a member of owner.
159 * Entity is automatic_allocated and uninitialized except if the type
160 * is type_method, then it is static_allocated and constant. The constant
161 * value is a pointer to the method.
162 * Visibility is local, offset -1, and it is not volatile.
164 ir_entity *new_entity(ir_type *owner, ident *name, ir_type *tp);
167 * Creates a new entity.
169 * Automatically inserts the entity as a member of owner.
170 * The entity is automatic allocated and uninitialized except if the type
171 * is type_method, then it is static allocated and constant. The constant
172 * value is a pointer to the method.
173 * Visibility is local, offset -1, and it is not volatile.
175 ir_entity *new_d_entity(ir_type *owner, ident *name, ir_type *tp, dbg_info *db);
178 * Copies the entity if the new_owner is different from the
179 * owner of the old entity, else returns the old entity.
181 * Automatically inserts the new entity as a member of owner.
182 * Resets the overwrites/overwritten_by fields.
183 * Keeps the old atomic value.
184 * @@@ Maybe we should change this. If peculiarity of a method
185 * is existent, we should add a new SymConst that points to
186 * itself and not to the origin. Right now we have to change
187 * the peculiarity and then set a new atomic value by hand.
189 ir_entity *copy_entity_own(ir_entity *old, ir_type *new_owner);
192 * Copies the entity if the new_name is different from the
193 * name of the old entity, else returns the old entity.
195 * Automatically inserts the new entity as a member of owner.
196 * The mangled name ld_name is set to NULL.
197 * Overwrites relation is copied from old.
199 ir_entity *copy_entity_name(ir_entity *old, ident *new_name);
204 * The owner will still contain the pointer to this
205 * entity, as well as all other references!
207 void free_entity(ir_entity *ent);
209 /** Returns the name of an entity. */
210 const char *get_entity_name(const ir_entity *ent);
212 /** Returns the ident of an entity. */
213 ident *get_entity_ident(const ir_entity *ent);
215 /** Sets the ident of the entity. */
216 void set_entity_ident(ir_entity *ent, ident *id);
218 /** Returns the mangled name of the entity.
220 * If the mangled name is set it returns the existing name.
221 * Else it generates a name with mangle_entity()
222 * and remembers this new name internally.
224 ident *get_entity_ld_ident(ir_entity *ent);
226 /** Sets the mangled name of the entity. */
227 void set_entity_ld_ident(ir_entity *ent, ident *ld_ident);
229 /** Returns the mangled name of the entity as a string. */
230 const char *get_entity_ld_name(ir_entity *ent);
232 /** Returns the owner of the entity. */
233 ir_type *get_entity_owner(ir_entity *ent);
235 /** Sets the owner field in entity to owner. Don't forget to add
237 void set_entity_owner(ir_entity *ent, ir_type *owner);
239 /** Returns the type of an entity. */
240 ir_type *get_entity_type(ir_entity *ent);
242 /** Sets the type of an entity. */
243 void set_entity_type(ir_entity *ent, ir_type *tp);
245 /** The allocation type. */
247 allocation_automatic, /**< The entity is allocated during runtime, implicitly
248 as component of a compound type. This is the default. */
249 allocation_parameter, /**< The entity is a parameter. It is also automatic allocated.
250 We distinguish the allocation of parameters from the allocation
251 of local variables as their placement depends on the calling
253 allocation_dynamic, /**< The entity is allocated during runtime, explicitly
255 allocation_static /**< The entity is allocated statically. We can use a
256 Const as address of the entity. This is the default for methods. */
259 /** Returns the allocation type of an entity. */
260 ir_allocation get_entity_allocation(const ir_entity *ent);
262 /** Sets the allocation type of an entity. */
263 void set_entity_allocation(ir_entity *ent, ir_allocation al);
265 /** Return the name of the allocation type. */
266 const char *get_allocation_name(ir_allocation vis);
268 /** Returns the visibility of an entity. */
269 ir_visibility get_entity_visibility(const ir_entity *ent);
271 /** Sets the visibility of an entity. */
272 void set_entity_visibility(ir_entity *ent, ir_visibility vis);
274 /** Return the name of the visibility */
275 const char *get_visibility_name(ir_visibility vis);
277 /** This enumeration flags the variability of entities. */
279 variability_uninitialized, /**< The content of the entity is completely unknown. Default. */
280 variability_initialized, /**< After allocation the entity is initialized with the
281 value given somewhere in the entity. */
282 variability_part_constant, /**< For entities of compound types.
283 The members of the entity are mixed constant,
284 initialized or uninitialized. */
285 variability_constant /**< The entity is constant. */
288 /** Returns the variability of an entity. */
289 ir_variability get_entity_variability(const ir_entity *ent);
291 /** Sets the variability of an entity. */
292 void set_entity_variability(ir_entity *ent, ir_variability var);
294 /** Return the name of the variability. */
295 const char *get_variability_name(ir_variability var);
297 /** This enumeration flags the volatility of entities and Loads/Stores. */
299 volatility_non_volatile, /**< The entity is not volatile. Default. */
300 volatility_is_volatile /**< The entity is volatile. */
303 /** Returns the volatility of an entity. */
304 ir_volatility get_entity_volatility(const ir_entity *ent);
306 /** Sets the volatility of an entity. */
307 void set_entity_volatility(ir_entity *ent, ir_volatility vol);
309 /** Return the name of the volatility. */
310 const char *get_volatility_name(ir_volatility var);
312 /** This enumeration flags the align of Loads/Stores. */
314 align_non_aligned, /**< The entity is not aligned. */
315 align_is_aligned /**< The entity is aligned. Default */
318 /** Returns the alignment of an entity. */
319 ir_align get_entity_align(const ir_entity *ent);
321 /** Sets the alignment of an entity. */
322 void set_entity_align(ir_entity *ent, ir_align a);
324 /** Return the name of the alignment. */
325 const char *get_align_name(ir_align a);
327 /** This enumeration flags the stickyness of an entity. */
329 stickyness_unsticky, /**< The entity can be removed from
330 the program, unless contraindicated
331 by other attributes. Default. */
332 stickyness_sticky /**< The entity must remain in the
333 program in any case. */
336 /** Get the entity's stickyness. */
337 ir_stickyness get_entity_stickyness(const ir_entity *ent);
339 /** Set the entity's stickyness. */
340 void set_entity_stickyness(ir_entity *ent, ir_stickyness stickyness);
342 /** Returns the offset of an entity (in a compound) in bytes. Only set if layout = fixed. */
343 int get_entity_offset(const ir_entity *ent);
345 /** Sets the offset of an entity (in a compound) in bytes. */
346 void set_entity_offset(ir_entity *ent, int offset);
348 /** Returns the offset bit remainder of a bitfield entity (in a compound) in bits. Only set if layout = fixed. */
349 unsigned char get_entity_offset_bits_remainder(const ir_entity *ent);
351 /** Sets the offset bit remainder of a bitfield entity (in a compound) in bits. */
352 void set_entity_offset_bits_remainder(ir_entity *ent, unsigned char offset);
354 /** Returns the stored intermediate information. */
355 void *get_entity_link(const ir_entity *ent);
357 /** Stores new intermediate information. */
358 void set_entity_link(ir_entity *ent, void *l);
360 /* -- Fields of method entities -- */
361 /** The entity knows the corresponding irg if the entity is a method.
362 This allows to get from a Call to the called irg.
363 Only entities of peculiarity "existent" can have a corresponding irg,
364 else the field is fixed to NULL. (Get returns NULL, set asserts.) */
365 ir_graph *get_entity_irg(const ir_entity *ent);
366 void set_entity_irg(ir_entity *ent, ir_graph *irg);
368 /** Gets the entity vtable number. */
369 unsigned get_entity_vtable_number(const ir_entity *ent);
371 /** Sets the entity vtable number. */
372 void set_entity_vtable_number(ir_entity *ent, unsigned vtable_number);
374 /** Return the peculiarity of an entity. */
375 ir_peculiarity get_entity_peculiarity(const ir_entity *ent);
377 /** Sets the peculiarity of an entity. */
378 void set_entity_peculiarity(ir_entity *ent, ir_peculiarity pec);
380 /** Checks if an entity cannot be overridden anymore. */
381 int is_entity_final(const ir_entity *ent);
383 /** Sets/resets the final flag of an entity. */
384 void set_entity_final(ir_entity *ent, int final);
386 /** Checks if an entity is compiler generated. */
387 int is_entity_compiler_generated(const ir_entity *ent);
389 /** Sets/resets the compiler generated flag. */
390 void set_entity_compiler_generated(ir_entity *ent, int flag);
392 /** Checks if an entity is marked by the backend. */
393 int is_entity_backend_marked(const ir_entity *ent);
395 /** Sets/resets the backend marker flag. */
396 void set_entity_backend_marked(ir_entity *ent, int flag);
399 * The state of the address_taken flag.
402 ir_address_not_taken = 0, /**< The address is NOT taken. */
403 ir_address_taken_unknown = 1, /**< The state of the address taken flag is unknown. */
404 ir_address_taken = 2 /**< The address IS taken. */
405 } ir_address_taken_state;
407 /** Return the state of the address taken flag of an entity. */
408 ir_address_taken_state get_entity_address_taken(const ir_entity *ent);
410 /** Sets/resets the state of the address taken flag of an entity. */
411 void set_entity_address_taken(ir_entity *ent, ir_address_taken_state flag);
413 /** Return the name of the address_taken state. */
414 const char *get_address_taken_state_name(ir_address_taken_state state);
417 * Returns the debug information of an entity.
419 * @param ent The entity.
421 dbg_info *get_entity_dbg_info(const ir_entity *ent);
424 * Sets the debug information of an entity.
426 * @param ent The entity.
427 * @param db The debug info.
429 void set_entity_dbg_info(ir_entity *ent, dbg_info *db);
431 /* -- Representation of constant values of entities -- */
433 * Returns true if the the node is representable as code on
436 * @deprecated This function is not used by libFirm and stays here
437 * only as a helper for the old Jack frontend.
439 int is_irn_const_expression(ir_node *n);
442 * Copies a Firm subgraph that complies to the restrictions for
443 * constant expressions to current_block in current_ir_graph.
445 * @param dbg debug info for all newly created nodes
448 * Set current_ir_graph to get_const_code_irg() to generate a constant
451 ir_node *copy_const_value(dbg_info *dbg, ir_node *n);
453 /* Set has no effect for existent entities of type method. */
454 ir_node *get_atomic_ent_value(ir_entity *ent);
455 void set_atomic_ent_value(ir_entity *ent, ir_node *val);
457 /** the kind (type) of an initializer */
458 typedef enum ir_initializer_kind_t {
459 /* initializer containing an ir_node from the const-code irg */
460 IR_INITIALIZER_CONST,
461 /* initializer containing a tarval */
462 IR_INITIALIZER_TARVAL,
463 /* initializes type with default values (usually 0) */
465 /* list of initializers used to initializer a compound or array type */
466 IR_INITIALIZER_COMPOUND
467 } ir_initializer_kind_t;
469 /** returns kind of an initializer */
470 ir_initializer_kind_t get_initializer_kind(const ir_initializer_t *initializer);
473 * returns the null initializer (there's only one instance of it in a program )
475 ir_initializer_t *get_initializer_null(void);
478 * creates an initializer containing a reference to a node on the const-code
481 ir_initializer_t *create_initializer_const(ir_node *value);
483 /** creates an initializer containing a single tarval value */
484 ir_initializer_t *create_initializer_tarval(tarval *tv);
486 /** return value contained in a const initializer */
487 ir_node *get_initializer_const_value(const ir_initializer_t *initializer);
489 /** return value contained in a tarval initializer */
490 tarval *get_initializer_tarval_value(const ir_initializer_t *initialzier);
492 /** creates a compound initializer which holds @p n_entries entries */
493 ir_initializer_t *create_initializer_compound(unsigned n_entries);
495 /** returns the number of entries in a compound initializer */
496 unsigned get_initializer_compound_n_entries(const ir_initializer_t *initializer);
498 /** sets entry with index @p index to the initializer @p value */
499 void set_initializer_compound_value(ir_initializer_t *initializer,
500 unsigned index, ir_initializer_t *value);
502 /** returns the value with index @p index of a compound initializer */
503 ir_initializer_t *get_initializer_compound_value(
504 const ir_initializer_t *initializer, unsigned index);
506 /** Creates a new compound graph path of given length. */
507 compound_graph_path *new_compound_graph_path(ir_type *tp, int length);
509 /** Returns non-zero if an object is a compound graph path */
510 int is_compound_graph_path(const void *thing);
512 /** Frees a graph path object */
513 void free_compound_graph_path(compound_graph_path *gr);
515 /** Returns the length of a graph path */
516 int get_compound_graph_path_length(const compound_graph_path *gr);
518 ir_entity *get_compound_graph_path_node(const compound_graph_path *gr, int pos);
519 void set_compound_graph_path_node(compound_graph_path *gr, int pos, ir_entity *node);
520 int get_compound_graph_path_array_index(const compound_graph_path *gr, int pos);
521 void set_compound_graph_path_array_index(compound_graph_path *gr, int pos, int index);
523 /** Checks whether the path up to pos is correct. If the path contains a NULL,
524 * assumes the path is not complete and returns non-zero. */
525 int is_proper_compound_graph_path(compound_graph_path *gr, int pos);
527 /* A value of a compound entity is a pair of a value and the description of the
528 corresponding access path to the member of the compound. */
529 void add_compound_ent_value_w_path(ir_entity *ent, ir_node *val, compound_graph_path *path);
530 void set_compound_ent_value_w_path(ir_entity *ent, ir_node *val, compound_graph_path *path, int pos);
532 /** Returns the number of constant values needed to initialize the entity.
534 * Asserts if the entity has variability_uninitialized.
536 int get_compound_ent_n_values(ir_entity *ent);
537 /** Returns a constant value given the position. */
538 ir_node *get_compound_ent_value(ir_entity *ent, int pos);
539 /** Returns the access path for value at position pos. */
540 compound_graph_path *get_compound_ent_value_path(ir_entity *ent, int pos);
541 /** Returns a constant value given the access path.
542 * The path must contain array indices for all array element entities. */
543 ir_node *get_compound_ent_value_by_path(ir_entity *ent, compound_graph_path *path);
545 /** Removes all constant entries where the path ends at value_ent. Does not
546 free the memory of the paths. (The same path might be used for several
547 constant entities. */
548 void remove_compound_ent_value(ir_entity *ent, ir_entity *value_ent);
550 /* Some languages support only trivial access paths, i.e., the member is a
551 direct, atomic member of the constant entities type. In this case the
552 corresponding entity can be accessed directly. The following functions
553 allow direct access. */
555 /** Generates a Path with length 1.
556 Beware: Has a bad runtime for array elements (O(|array|) and should be
557 avoided there. Use add_compound_ent_value_w_path() instead and create
558 the path manually. */
559 void add_compound_ent_value(ir_entity *ent, ir_node *val, ir_entity *member);
561 /** Returns the last member in the path */
562 ir_entity *get_compound_ent_value_member(ir_entity *ent, int pos);
564 /** Sets the path at pos 0 */
565 void set_compound_ent_value(ir_entity *ent, ir_node *val, ir_entity *member, int pos);
567 void set_entity_initializer(ir_entity *entity, ir_initializer_t *initializer);
569 ir_initializer_t *get_entity_initializer(const ir_entity *entity);
571 /** Initializes the entity ent which must be of a one dimensional
572 array type with the values given in the values array.
573 The array must have a lower and an upper bound. Keeps the
574 order of values. Does not test whether the number of values
575 fits into the given array size. Does not test whether the
576 values have the proper mode for the array. */
577 void set_array_entity_values(ir_entity *ent, tarval **values, int num_vals);
580 * Return the offset in bits from the last byte address.
582 * This requires that the layout of all concerned types is fixed.
584 * @param ent Any entity of compound type with at least pos initialization values.
585 * @param pos The position of the value for which the offset is requested.
587 unsigned get_compound_ent_value_offset_bit_remainder(ir_entity *ent, int pos);
589 /** Return the overall offset of value at position pos in bytes.
591 * This requires that the layout of all concerned types is fixed.
592 * Asserts if bit offset is not byte aligned.
594 * @param ent Any entity of compound type with at least pos initialization values.
595 * @param pos The position of the value for which the offset is requested.
597 unsigned get_compound_ent_value_offset_bytes(ir_entity *ent, int pos);
599 /* --- Fields of entities with a class type as owner --- */
600 /* Overwrites is a field that specifies that an access to the overwritten
601 entity in the supertype must use this entity. It's a list as with
602 multiple inheritance several entities can be overwritten. This field
603 is mostly useful for method entities.
604 If a Sel node selects an entity that is overwritten by other entities it
605 must return a pointer to the entity of the dynamic type of the pointer
606 that is passed to it. Lowering of the Sel node must assure this.
607 Overwrittenby is the inverse of overwrites. Both add routines add
608 both relations, they only differ in the order of arguments. */
609 void add_entity_overwrites(ir_entity *ent, ir_entity *overwritten);
610 int get_entity_n_overwrites(ir_entity *ent);
611 int get_entity_overwrites_index(ir_entity *ent, ir_entity *overwritten);
612 ir_entity *get_entity_overwrites(ir_entity *ent, int pos);
613 void set_entity_overwrites(ir_entity *ent, int pos, ir_entity *overwritten);
614 void remove_entity_overwrites(ir_entity *ent, ir_entity *overwritten);
616 void add_entity_overwrittenby(ir_entity *ent, ir_entity *overwrites);
617 int get_entity_n_overwrittenby(ir_entity *ent);
618 int get_entity_overwrittenby_index(ir_entity *ent, ir_entity *overwrites);
619 ir_entity *get_entity_overwrittenby(ir_entity *ent, int pos);
620 void set_entity_overwrittenby(ir_entity *ent, int pos, ir_entity *overwrites);
621 void remove_entity_overwrittenby(ir_entity *ent, ir_entity *overwrites);
624 * Checks whether a pointer points to an entity.
626 * @param thing an arbitrary pointer
629 * true if the thing is an entity, else false
631 int is_entity(const void *thing);
633 /** Returns true if the type of the entity is a primitive, pointer
634 * enumeration or method type.
636 * @Note This is a different classification than from is_primitive_type().
638 int is_atomic_entity(ir_entity *ent);
639 /** Returns true if the type of the entity is a class, structure,
640 array or union type. */
641 int is_compound_entity(ir_entity *ent);
642 /** Returns true if the type of the entity is a Method type. */
643 int is_method_entity(ir_entity *ent);
645 /** Returns non-zero if ent1 and ent2 have are equal except for their owner.
646 Two entities are equal if
647 - they have the same type (the same C-struct)
650 int equal_entity(ir_entity *ent1, ir_entity *ent2);
652 /** Outputs a unique number for this entity if libfirm is compiled for
653 * debugging, (configure with --enable-debug) else returns the address
654 * of the type cast to long.
656 long get_entity_nr(const ir_entity *ent);
658 /** Returns the entities visited count. */
659 unsigned long get_entity_visited(ir_entity *ent);
661 /** Sets the entities visited count. */
662 void set_entity_visited(ir_entity *ent, unsigned long num);
664 /** Sets visited field in entity to entity_visited. */
665 void mark_entity_visited(ir_entity *ent);
667 /** Returns true if this entity was visited. */
668 int entity_visited(ir_entity *ent);
670 /** Returns true if this entity was not visited. */
671 int entity_not_visited(ir_entity *ent);
674 * Returns the mask of the additional entity properties.
675 * The properties are automatically inherited from the irg if available
676 * or from the method type if they were not set using
677 * set_entity_additional_properties() or
678 * set_entity_additional_property().
680 unsigned get_entity_additional_properties(ir_entity *ent);
682 /** Sets the mask of the additional graph properties. */
683 void set_entity_additional_properties(ir_entity *ent, unsigned property_mask);
685 /** Sets one additional graph property. */
686 void set_entity_additional_property(ir_entity *ent, mtp_additional_property flag);
688 /** Returns the class type that this type info entity represents or NULL
689 if ent is no type info entity. */
690 ir_type *get_entity_repr_class(const ir_entity *ent);
693 * @page unknown_entity The Unknown entity
695 * This entity is an auxiliary entity dedicated to support analyses.
697 * The unknown entity represents that there could be an entity, but it is not
698 * known. This entity can be used to initialize fields before an analysis (not known
699 * yet) or to represent the top of a lattice (could not be determined). There exists
700 * exactly one entity unknown. This entity has as owner and as type the unknown type. It is
701 * allocated when initializing the entity module.
703 * The entity can take the role of any entity, also methods. It returns default
704 * values in these cases.
706 * The following values are set:
708 * - name = "unknown_entity"
709 * - ld_name = "unknown_entity"
710 * - owner = unknown_type
711 * - type = unknown_type
712 * - allocation = allocation_automatic
713 * - visibility = visibility_external_allocated
715 * - variability = variability_uninitialized
716 * - value = SymConst(unknown_entity)
719 * - peculiarity = peculiarity_existent
720 * - volatility = volatility_non_volatile
721 * - stickyness = stickyness_unsticky
723 * - overwrites = NULL
724 * - overwrittenby = NULL
728 /* A variable that contains the only unknown entity. */
729 extern ir_entity *unknown_entity;
731 /** Returns the @link unknown_entity unknown entity @endlink. */
732 ir_entity *get_unknown_entity(void);
734 /** Encodes how a pointer parameter is accessed. */
735 typedef enum acc_bits {
736 ptr_access_none = 0, /**< no access */
737 ptr_access_read = 1, /**< read access */
738 ptr_access_write = 2, /**< write access */
739 ptr_access_rw = ptr_access_read|ptr_access_write, /**< read AND write access */
740 ptr_access_store = 4, /**< the pointer is stored */
741 ptr_access_all = ptr_access_rw|ptr_access_store /**< all possible access */
744 #define IS_READ(a) ((a) & ptr_access_read)
745 #define IS_WRITTEN(a) ((a) & ptr_access_write)
746 #define IS_STORED(a) ((a) & ptr_access_store)
749 * @page tyop type operations
750 * This module specifies the kinds of types available in firm.
752 * They are called type opcodes. These include classes, structs, methods, unions,
753 * arrays, enumerations, pointers and primitive types.
754 * Special types with own opcodes are the id type, a type representing an unknown
755 * type and a type used to specify that something has no type.
761 * An enum for the type kinds.
762 * For each type kind exists a typecode to identify it.
765 tpo_uninitialized = 0, /* not a type opcode */
766 tpo_class, /**< A class type. */
767 tpo_struct, /**< A struct type. */
768 tpo_method, /**< A method type. */
769 tpo_union, /**< An union type. */
770 tpo_array, /**< An array type. */
771 tpo_enumeration, /**< An enumeration type. */
772 tpo_pointer, /**< A pointer type. */
773 tpo_primitive, /**< A primitive type. */
774 tpo_id, /**< Special Id tag used for type replacement. */
775 tpo_none, /**< Special type for the None type. */
776 tpo_unknown, /**< Special code for the Unknown type. */
777 tpo_max /* not a type opcode */
781 * A structure containing information about a kind of type.
782 * A structure containing information about a kind of type. So far
783 * this is only the kind name, an enum for case-switching and some
786 * @see get_tpop_name(), get_tpop_code(), get_tpop_ident()
788 typedef struct tp_op tp_op;
792 * Returns the string for the type opcode.
794 * @param op The type opcode to get the string from.
795 * @return a string. (@todo Null terminated?)
797 const char *get_tpop_name(const tp_op *op);
800 * Returns an enum for the type opcode.
802 * @param op The type opcode to get the enum from.
805 tp_opcode get_tpop_code(const tp_op *op);
808 * Returns the ident for the type opcode.
810 * @param op The type opcode to get the ident from.
813 ident *get_tpop_ident(const tp_op *op);
816 * This type opcode marks that the corresponding type is a class type.
818 * Consequently the type refers to supertypes, subtypes and entities.
819 * Entities can be any fields, but also methods.
820 * @@@ value class or not???
821 * This struct is dynamically allocated but constant for the lifetime
824 extern tp_op *type_class;
825 tp_op *get_tpop_class(void);
828 * This type opcode marks that the corresponding type is a compound type
831 * Consequently the type refers to a list of entities
832 * which may not be methods (but pointers to methods).
833 * This struct is dynamically allocated but constant for the lifetime
836 extern tp_op *type_struct;
837 tp_op *get_tpop_struct(void);
840 * This type opcode marks that the corresponding type is a method type.
842 * Consequently it refers to a list of arguments and results.
843 * This struct is dynamically allocated but constant for the lifetime
846 extern tp_op *type_method;
847 tp_op *get_tpop_method(void);
850 * This type opcode marks that the corresponding type is a union type.
852 * Consequently it refers to a list of unioned types.
853 * This struct is dynamically allocated but constant for the lifetime
856 extern tp_op *type_union;
857 tp_op *get_tpop_union(void);
860 * This type opcode marks that the corresponding type is an array type.
862 * Consequently it contains a list of dimensions (lower and upper bounds)
863 * and an element type.
864 * This struct is dynamically allocated but constant for the lifetime
867 extern tp_op *type_array;
868 tp_op *get_tpop_array(void);
871 * This type opcode marks that the corresponding type is an enumeration type.
873 * Consequently it contains a list of idents for the enumeration identifiers
874 * and a list of target values that are the constants used to implement
876 * This struct is dynamically allocated but constant for the lifetime
879 extern tp_op *type_enumeration;
880 tp_op *get_tpop_enumeration(void);
883 * This type opcode marks that the corresponding type is a pointer type.
885 * It contains a reference to the type the pointer points to.
886 * This struct is dynamically allocated but constant for the lifetime
889 extern tp_op *type_pointer;
890 tp_op *get_tpop_pointer(void);
893 * This type opcode marks that the corresponding type is a primitive type.
895 * Primitive types are types that are directly mapped to target machine
897 * This struct is dynamically allocated but constant for the lifetime
900 extern tp_op *type_primitive;
901 tp_op *get_tpop_primitive(void);
904 * This type opcode is an auxiliary opcode dedicated to support transformations
905 * of the type structure.
907 * If a type is changed to another type with another
908 * opcode the new type will be allocated with new memory. All nodes refering
909 * to the old type need to be changed to refer to the new one. This is simplified
910 * by turning the old type into an id type that merely forwards to the new type
911 * that now replaces the old one.
912 * type_ids should never be visible out of the type module. All access routines
913 * should automatically check for type_id and eventually follow the forward in
914 * type_id. Two types are exchanged by a call to exchange_types.
915 * If a type_id is visible externally report this as bug. If it is assured that
916 * this never happens this extern variable can be moved to tpop_t.h.
917 * This struct is dynamically allocated but constant for the lifetime
920 extern tp_op *type_id;
921 tp_op *get_tpop_id(void);
924 * This type opcode is an auxiliary opcode dedicated to support type analyses.
926 * Types with this opcode represents that there is no type.
927 * The type can be used to initialize fields of the type* that actually can not
928 * contain a type or that are initialized for an analysis. There exists exactly
929 * one type with this opcode.
931 extern tp_op *tpop_none;
932 tp_op *get_tpop_none(void);
935 * This type opcode is an auxiliary opcode dedicated to support type analyses.
937 * Types with this opcode represents that there could be a type, but it is not
938 * known. This type can be used to initialize fields before an analysis (not known
939 * yet) or to represent the top of a lattice (could not be determined). There exists
940 * exactly one type with this opcode.
942 extern tp_op *tpop_unknown;
943 tp_op *get_tpop_unknown(void);
945 /* ----------------------------------------------------------------------- */
946 /* Classify pairs of types/entities in the inheritance relations. */
947 /* ----------------------------------------------------------------------- */
949 /** Returns true if low is subclass of high.
951 * Low is a subclass of high if low == high or if low is a subclass of
952 * a subclass of high. I.e, we search in all subtypes of high for low.
953 * @@@ this can be implemented more efficient if we know the set of all
954 * subclasses of high. */
955 int is_SubClass_of(ir_type *low, ir_type *high);
957 /** Subclass check for pointers to classes.
959 * Dereferences at both types the same amount of pointer types (as
960 * many as possible). If the remaining types are both class types
961 * and subclasses, returns true, else false. Can also be called with
962 * two class types. */
963 int is_SubClass_ptr_of(ir_type *low, ir_type *high);
965 /** Returns true if high is superclass of low.
967 * Low is a subclass of high if low == high or if low is a subclass of
968 * a subclass of high. I.e, we search in all subtypes of high for low.
969 * @@@ this can be implemented more efficient if we know the set of all
970 * subclasses of high. */
971 #define is_SuperClass_of(high, low) is_SubClass_of(low, high)
973 /** Superclass check for pointers to classes.
975 * Dereferences at both types the same amount of pointer types (as
976 * many as possible). If the remaining types are both class types
977 * and superclasses, returns true, else false. Can also be called with
978 * two class types. */
979 #define is_SuperClass_ptr_of(low, high) is_SubClass_ptr_of(high, low)
981 /** Returns true if high is (transitive) overwritten by low.
983 * Returns false if high == low. */
984 int is_overwritten_by(ir_entity *high, ir_entity *low);
986 /** Resolve polymorphism in the inheritance relation.
988 * Returns the dynamically referenced entity if the static entity and the
989 * dynamic type are given.
990 * Searches downwards in overwritten tree. */
991 ir_entity *resolve_ent_polymorphy(ir_type *dynamic_class, ir_entity* static_ent);
993 /* ----------------------------------------------------------------------- */
994 /* Resolve implicit inheritance. */
995 /* ----------------------------------------------------------------------- */
997 /** Default name mangling for inherited entities.
999 * Returns an ident that consists of the name of type followed by an
1000 * underscore and the name (not ld_name) of the entity. */
1001 ident *default_mangle_inherited_name(ir_entity *ent, ir_type *clss);
1003 /** Type of argument functions for inheritance resolver.
1005 * @param ent The entity in the super type that will be overwritten
1006 * by the newly generated entity, for which this name is
1008 * @param clss The class type in which the new entity will be placed.
1010 typedef ident *mangle_inherited_name_func(ir_entity *ent, ir_type *clss);
1012 /** Resolve implicit inheritance.
1014 * Resolves the implicit inheritance supplied by firm. Firm defines,
1015 * that each entity that is not overwritten in a subclass is
1016 * inherited to this subclass without change implicitly. This
1017 * function generates entities that explicitly represent this
1018 * inheritance. It generates for each entity overwriting entities in
1019 * all subclasses of the owner of the entity, if the entity is not
1020 * overwritten in that subclass.
1022 * The name of the new entity is generated with the function passed.
1023 * If the function is NULL, the default_mangle_inherited_name() is
1026 * This function was moved here from firmlower 3/2005.
1028 void resolve_inheritance(mangle_inherited_name_func *mfunc);
1031 /* ----------------------------------------------------------------------- */
1032 /* The transitive closure of the subclass/superclass and */
1033 /* overwrites/overwrittenby relation. */
1035 /* A walk over the ir (O(#types+#entities)) computes the transitive */
1036 /* closure. Adding a new type/entity or changing the basic relations in */
1037 /* some other way invalidates the transitive closure, i.e., it is not */
1038 /* updated by the basic functions. */
1040 /* The transitive edges are held in a set, not in an array as the */
1041 /* underlying relation. */
1043 /* Do the sets contain the node itself? I assume NOT! */
1044 /* ----------------------------------------------------------------------- */
1046 /** The state of the transitive closure.
1048 * @todo: we could manage the state for each relation separately. Invalidating
1049 * the entity relations does not mean invalidating the class relation. */
1051 inh_transitive_closure_none, /**< Closure is not computed, can not be accessed. */
1052 inh_transitive_closure_valid, /**< Closure computed and valid. */
1053 inh_transitive_closure_invalid, /**< Closure invalid, but can be accessed. */
1054 inh_transitive_closure_max /**< Invalid value. */
1055 } inh_transitive_closure_state;
1057 void set_irp_inh_transitive_closure_state(inh_transitive_closure_state s);
1058 void invalidate_irp_inh_transitive_closure_state(void);
1059 inh_transitive_closure_state get_irp_inh_transitive_closure_state(void);
1062 /** Compute transitive closure of the subclass/superclass and
1063 * overwrites/overwrittenby relation.
1065 * This function walks over the ir (O(#types+#entities)) to compute the
1066 * transitive closure. */
1067 void compute_inh_transitive_closure(void);
1069 /** Free memory occupied by the transitive closure information. */
1070 void free_inh_transitive_closure(void);
1073 /* - subtype ------------------------------------------------------------- */
1075 /** Iterate over all transitive subtypes. */
1076 ir_type *get_class_trans_subtype_first(const ir_type *tp);
1077 ir_type *get_class_trans_subtype_next(const ir_type *tp);
1078 int is_class_trans_subtype(const ir_type *tp, const ir_type *subtp);
1080 /* - supertype ----------------------------------------------------------- */
1082 /** Iterate over all transitive supertypes. */
1083 ir_type *get_class_trans_supertype_first(const ir_type *tp);
1084 ir_type *get_class_trans_supertype_next(const ir_type *tp);
1086 /* - overwrittenby ------------------------------------------------------- */
1088 /** Iterate over all entities that transitive overwrite this entities. */
1089 ir_entity *get_entity_trans_overwrittenby_first(const ir_entity *ent);
1090 ir_entity *get_entity_trans_overwrittenby_next(const ir_entity *ent);
1092 /* - overwrites ---------------------------------------------------------- */
1094 /** Iterate over all transitive overwritten entities. */
1095 ir_entity *get_entity_trans_overwrites_first(const ir_entity *ent);
1096 ir_entity *get_entity_trans_overwrites_next(const ir_entity *ent);
1099 /* ----------------------------------------------------------------------- */
1100 /** The state of Cast operations that cast class types or pointers to class
1103 * The state expresses, how far Cast operations conform with the class
1107 * class B1 extends A {}
1108 * class B2 extends A {}
1109 * class C extends B1 {}
1110 * normalized: Cast operations conform with the inheritance relation.
1111 * I.e., the type of the operand of a Cast is either a super= or a sub-
1112 * type of the type casted to. Example: (A)((B2) (new C())).
1113 * transitive: Cast operations conform with the transitive inheritance
1114 * relation. Example: (A)(new C()).
1115 * any: Cast operations do not conform with the transitive inheritance
1116 * relation. Example: (B2)(new B1())
1120 /* ----------------------------------------------------------------------- */
1122 /** Flags for class cast state.
1124 * The state in irp is always smaller or equal to the state of any
1127 * We rely on the ordering of the enum. */
1129 ir_class_casts_any = 0, /**< There are class casts that do not cast in conformance with
1130 the class hierarchy. @@@ So far this does not happen in Firm. */
1131 ir_class_casts_transitive = 1, /**< Class casts conform to transitive inheritance edges. Default. */
1132 ir_class_casts_normalized = 2, /**< Class casts conform to inheritance edges. */
1133 ir_class_casts_state_max
1134 } ir_class_cast_state;
1135 char *get_class_cast_state_string(ir_class_cast_state s);
1137 void set_irg_class_cast_state(ir_graph *irg, ir_class_cast_state s);
1138 ir_class_cast_state get_irg_class_cast_state(ir_graph *irg);
1139 void set_irp_class_cast_state(ir_class_cast_state s);
1140 ir_class_cast_state get_irp_class_cast_state(void);
1142 /** Verify the class cast state of an irg.
1144 * Asserts if state is to high, outputs warning if state is to low
1145 * and firm verbosity is set.
1147 void verify_irg_class_cast_state(ir_graph *irg);
1150 * possible trvrfy() error codes
1152 enum trvrfy_error_codes {
1153 no_error = 0, /**< no error */
1154 error_ent_not_cont, /**< overwritten entity not in superclass */
1155 error_null_mem, /**< compound contains NULL member */
1156 error_const_on_wrong_irg, /**< constant placed on wrong IRG */
1157 error_existent_entity_without_irg, /**< Method entities with pecularity_exist must have an irg */
1158 error_wrong_ent_overwrites, /**< number of entity overwrites exceeds number of class overwrites */
1159 error_inherited_ent_without_const, /**< inherited method entity not pointing to existent entity */
1160 error_glob_ent_allocation, /**< wrong allocation of a global entity */
1161 error_ent_const_mode, /**< Mode of constant in entity did not match entities type. */
1162 error_ent_wrong_owner /**< Mode of constant in entity did not match entities type. */
1169 * 0 if no error encountered
1171 int check_type(ir_type *tp);
1174 * Check an entity. Currently, we check only if initialized constants
1175 * are build on the const irg graph.
1178 * 0 if no error encountered
1179 * != 0 a trvrfy_error_codes code
1181 int check_entity(ir_entity *ent);
1184 * Walks the type information and performs a set of sanity checks.
1186 * Currently, the following checks are executed:
1187 * - values of initialized entities must be allocated on the constant IRG
1188 * - class types: doesn't have NULL members
1189 * - class types: all overwrites are existent in the super type
1192 * 0 if graph is correct
1198 * If NDEBUG is defined performs nothing, else calls the tr_vrfy() function.
1203 #define TR_VRFY() tr_vrfy()
1209 * This module supplies routines that support changing the type graph.
1212 /** Replaces one type by the other.
1214 * Old type is replaced by new_type. All references to old_type
1215 * now point to new_type. The memory for the old type is destroyed,
1216 * but still used. Therefore it is not freed.
1217 * All referenced to this memory will be lost after a certain while.
1218 * An exception is the list of types in irp (irprog.h).
1219 * In the future there might be a routine to recover the memory, but
1220 * this will be at considerable runtime cost.
1222 * @param old_type - The old type that shall be replaced by the new type.
1223 * @param new_type - The new type that will replace old_type.
1226 void exchange_types(ir_type *old_type, ir_type *new_type);
1228 /** Skip id types until a useful type is reached.
1230 * @param tp - A type of arbitrary kind.
1233 * tp if it is not an id type.
1234 * If tp is an id type returns the real type it stands for.
1236 ir_type *skip_tid(ir_type *tp);
1239 * @page type representation of types
1241 * Datastructure to hold type information.
1243 * This module supplies a datastructure to represent all types
1244 * known in the compiled program. This includes types specified
1245 * in the program as well as types defined by the language. In the
1246 * view of the intermediate representation there is no difference
1247 * between these types. Finally it specifies some auxiliary types.
1249 * There exist several kinds of types, arranged by the structure of
1250 * the type. A type is described by a set of attributes. Some of
1251 * these attributes are common to all types, others depend on the
1254 * Types are different from the modes defined in irmode: Types are
1255 * on the level of the programming language, modes at the level of
1256 * the target processor.
1261 #include "typerep.h"
1263 /** Frees all entities associated with a type.
1264 * Does not free the array entity.
1265 * Warning: ensure these entities are not referenced anywhere else.
1267 void free_type_entities(ir_type *tp);
1269 /** Frees the memory used by the type.
1271 * Removes the type from the type list. Does not free the entities
1272 * belonging to the type, except for the array element entity. Does
1273 * not free if tp is "none" or "unknown". Frees entities in value
1274 * param subtypes of method types!!! Make sure these are not
1275 * referenced any more. Further make sure there is no pointer type
1276 * that refers to this type. */
1277 void free_type(ir_type *tp);
1279 const tp_op *get_type_tpop(const ir_type *tp);
1280 ident *get_type_tpop_nameid(const ir_type *tp);
1281 const char *get_type_tpop_name(const ir_type *tp);
1282 tp_opcode get_type_tpop_code(const ir_type *tp);
1284 ident *get_type_ident(const ir_type *tp);
1285 void set_type_ident(ir_type *tp, ident* id);
1286 const char *get_type_name(const ir_type *tp);
1288 /** The visibility of a type.
1290 * The visibility of a type indicates, whether entities of this type
1291 * are accessed or allocated in external code.
1293 * An entity of a type is allocated in external code, if the external
1294 * code declares a variable of this type, or dynamically allocates
1295 * an entity of this type. If the external code declares a (compound)
1296 * type, that contains entities of this type, the visibility also
1297 * must be external_allocated.
1299 * The visibility must be higher than that of all entities, if the
1300 * type is a compound. Here it is questionable, what happens with
1301 * static entities. If these are accessed external by direct reference,
1302 * (a static call to a method, that is also in the dispatch table)
1303 * it should not affect the visibility of the type.
1306 * @@@ Do we need a visibility for types?
1307 * I change the layout of types radically when doing type splitting.
1308 * I need to know, which fields of classes are accessed in the RTS,
1309 * e.g., [_length. I may not move [_length to the split part.
1310 * The layout though, is a property of the type.
1312 * One could also think of changing the mode of a type ...
1314 * But, we could also output macros to access the fields, e.g.,
1315 * ACCESS_[_length (X) X->length // conventional
1316 * ACCESS_[_length (X) X->_split_ref->length // with type splitting
1318 * For now I implement this function, that returns the visibility
1319 * based on the visibility of the entities of a compound ...
1321 * This function returns visibility_external_visible if one or more
1322 * entities of a compound type have visibility_external_visible.
1323 * Entities of types are never visibility_external_allocated (right?).
1324 * Else returns visibility_local.
1326 ir_visibility get_type_visibility(const ir_type *tp);
1327 void set_type_visibility(ir_type *tp, ir_visibility v);
1331 /** The state of the type layout. */
1333 layout_undefined, /**< The layout of this type is not defined.
1334 Address computation to access fields is not
1335 possible, fields must be accessed by Sel
1336 nodes. Enumeration constants might be undefined.
1337 This is the default value except for
1338 pointer, primitive and method types. */
1339 layout_fixed /**< The layout is fixed, all component/member entities
1340 have an offset assigned. Size of the type is known.
1341 Arrays can be accessed by explicit address
1342 computation. Enumeration constants must be defined.
1343 Default for pointer, primitive and method types. */
1346 /** Returns a human readable string for the enum entry. */
1347 const char *get_type_state_name(ir_type_state s);
1349 /** Returns the type layout state of a type. */
1350 ir_type_state get_type_state(const ir_type *tp);
1352 /** Sets the type layout state of a type.
1354 * For primitives, pointer and method types the layout is always fixed.
1355 * This call is legal but has no effect.
1357 void set_type_state(ir_type *tp, ir_type_state state);
1359 /** Returns the mode of a type.
1361 * Returns NULL for all non atomic types.
1363 ir_mode *get_type_mode(const ir_type *tp);
1365 /** Sets the mode of a type.
1367 * Only has an effect on primitive, enumeration and pointer types.
1369 void set_type_mode(ir_type *tp, ir_mode* m);
1371 /** Returns the size of a type in bytes. */
1372 unsigned get_type_size_bytes(const ir_type *tp);
1374 /** Sets the size of a type in bytes.
1376 * For primitive, enumeration, pointer and method types the size
1377 * is always fixed. This call is legal but has no effect.
1379 void set_type_size_bytes(ir_type *tp, unsigned size);
1381 /** Returns the alignment of a type in bytes.
1383 * Returns -1 if the alignment is NOT
1384 * a byte size, i.e. not dividable by 8. Calls get_type_alignment_bits(). */
1385 unsigned get_type_alignment_bytes(ir_type *tp);
1387 /** Returns the alignment of a type in bits.
1389 * If the alignment of a type is
1390 * not set, it is calculated here according to the following rules:
1391 * -#.) if a type has a mode, the alignment is the mode size.
1392 * -#.) compound types have the alignment of there biggest member.
1393 * -#.) array types have the alignment of there element type.
1394 * -#.) method types return 0 here.
1395 * -#.) all other types return 1 here (i.e. aligned at byte).
1397 void set_type_alignment_bytes(ir_type *tp, unsigned align);
1399 /** Returns the visited count of a type. */
1400 unsigned long get_type_visited(const ir_type *tp);
1401 /** Sets the visited count of a type to num. */
1402 void set_type_visited(ir_type *tp, unsigned long num);
1403 /** Sets visited field in type to type_visited. */
1404 void mark_type_visited(ir_type *tp);
1405 /** Returns non-zero if the type is already visited */
1406 int type_visited(const ir_type *tp);
1407 /** Returns non-zero if the type is not yet visited */
1408 int type_not_visited(const ir_type *tp);
1410 /** Returns the associated link field of a type. */
1411 void *get_type_link(const ir_type *tp);
1412 /** Sets the associated link field of a type. */
1413 void set_type_link(ir_type *tp, void *l);
1416 * Visited flag to traverse the type information.
1418 * Increase this flag by one before traversing the type information
1419 * using inc_master_type_visited().
1420 * Mark type nodes as visited by mark_type_visited(ir_type).
1421 * Check whether node was already visited by type_visited(ir_type)
1422 * and type_not_visited(ir_type).
1423 * Or use the function to walk all types.
1427 void set_master_type_visited(unsigned long val);
1428 unsigned long get_master_type_visited(void);
1429 void inc_master_type_visited(void);
1432 * Sets the debug information of a type.
1434 * @param tp The type.
1435 * @param db The debug info.
1437 void set_type_dbg_info(ir_type *tp, dbg_info *db);
1440 * Returns the debug information of a type.
1442 * @param tp The type.
1444 dbg_info *get_type_dbg_info(const ir_type *tp);
1447 * Checks whether a pointer points to a type.
1449 * @param thing an arbitrary pointer
1452 * true if the thing is a type, else false
1454 int is_type(const void *thing);
1457 * Checks whether two types are structurally equal.
1459 * @param typ1 the first type
1460 * @param typ2 the second type
1463 * true if the types are equal, else false.
1465 * Types are equal if :
1466 * - they are the same type kind
1467 * - they have the same name
1468 * - they have the same mode (if applicable)
1469 * - they have the same type_state and, ev., the same size
1470 * - they are class types and have:
1471 * - the same members (see same_entity in entity.h)
1472 * - the same supertypes -- the C-pointers are compared --> no recursive call.
1473 * - the same number of subtypes. Subtypes are not compared,
1474 * as this could cause a cyclic test.
1475 * - the same peculiarity
1476 * - they are structure types and have the same members
1477 * - they are method types and have
1478 * - the same parameter types
1479 * - the same result types
1480 * - they are union types and have the same members
1481 * - they are array types and have
1482 * - the same number of dimensions
1483 * - the same dimension bounds
1484 * - the same dimension order
1485 * - the same element type
1486 * - they are enumeration types and have the same enumerator names
1487 * - they are pointer types and have the identical points_to type
1488 * (i.e., the same C-struct to represent the type, type_id is skipped.
1489 * This is to avoid endless recursions; with pointer types cyclic
1490 * type graphs are possible.)
1492 int equal_type(ir_type *typ1, ir_type *typ2);
1495 * Checks whether two types are structural comparable.
1497 * @param st pointer type
1498 * @param lt pointer type
1501 * true if type st is smaller than type lt, i.e. whenever
1502 * lt is expected a st can be used.
1504 * - they are the same type kind
1505 * - mode(st) < mode (lt) (if applicable)
1506 * - they are class types and st is (transitive) subtype of lt,
1507 * - they are structure types and
1508 * - the members of st have exactly one counterpart in lt with the same name,
1509 * - the counterpart has a bigger type.
1510 * - they are method types and have
1511 * - the same number of parameter and result types,
1512 * - the parameter types of st are smaller than those of lt,
1513 * - the result types of st are smaller than those of lt
1514 * - they are union types and have the members of st have exactly one
1515 * @return counterpart in lt and the type is smaller
1516 * - they are array types and have
1517 * - the same number of dimensions
1518 * - all bounds of lt are bound of st
1519 * - the same dimension order
1520 * - the same element type
1522 * - the element type of st is smaller than that of lt
1523 * - the element types have the same size and fixed layout.
1524 * - they are enumeration types and have the same enumerator names
1525 * - they are pointer types and have the points_to type of st is
1526 * @return smaller than the points_to type of lt.
1529 int smaller_type(ir_type *st, ir_type *lt);
1532 * @page class_type Representation of a class type
1534 * If the type opcode is set to type_class the type represents class
1535 * types. A list of fields and methods is associated with a class.
1536 * Further a class can inherit from and bequest to other classes.
1538 * The following attributes are private to this type kind:
1539 * - member: All entities belonging to this class. This are method entities
1540 * which have type_method or fields that can have any of the
1541 * following type kinds: type_class, type_struct, type_union,
1542 * type_array, type_enumeration, type_pointer, type_primitive.
1544 * The following two are dynamic lists that can be grown with an "add_" function,
1547 * - subtypes: A list of direct subclasses.
1549 * - supertypes: A list of direct superclasses.
1551 * - peculiarity: The peculiarity of this class. If the class is of peculiarity
1552 * "description" it only is a description of requirements to a class,
1553 * as, e.g., a Java interface. The class will never be allocated.
1554 * Peculiarity inherited is only possible for entities. An entity
1555 * is of peculiarity inherited if the compiler generated the entity
1556 * to explicitly resolve inheritance. An inherited method entity has
1558 * Values: description, existent, inherited. Default: existent.
1560 * - type_info: An entity representing the type information of this class.
1561 * This entity can be of arbitrari type, Firm did not use it yet.
1562 * It allows to express the coupling of a type with an entity
1563 * representing this type. This information is useful for lowering
1564 * of InstOf and TypeChk nodes. Default: NULL
1566 * - vtable_size: The size of this class virtual function table.
1569 * - final: A final class is always a leaf in the class hierarchy. Final
1570 * classes cannot be super classes of other ones. As this information
1571 * can only be computed in whole world compilations, we allow to
1572 * set this flag. It is used in optimizations if get_opt_closed_world()
1573 * is false. Default: false
1575 * - interface: The class represents an interface. This flag can be set to distinguish
1576 * between interfaces, abstract classes and other classes that all may
1577 * have the peculiarity peculiarity_description. Depending on this flag
1578 * the lowering might do different actions. Default: false
1580 * - abstract : The class represents an abstract class. This flag can be set to distinguish
1581 * between interfaces, abstract classes and other classes that all may
1582 * have the peculiarity peculiarity_description. Depending on this flag
1583 * the lowering might do different actions. Default: false
1586 /** Creates a new class type. */
1587 ir_type *new_type_class(ident *name);
1589 /** Creates a new class type with debug information. */
1590 ir_type *new_d_type_class(ident *name, dbg_info *db);
1592 /* --- manipulate private fields of class type --- */
1594 /** Adds the entity as member of the class. */
1595 void add_class_member(ir_type *clss, ir_entity *member);
1597 /** Returns the number of members of this class. */
1598 int get_class_n_members(const ir_type *clss);
1600 /** Returns the member at position pos, 0 <= pos < n_member */
1601 ir_entity *get_class_member(const ir_type *clss, int pos);
1603 /** Returns index of mem in clss, -1 if not contained. */
1604 int get_class_member_index(const ir_type *clss, ir_entity *mem);
1606 /** Finds the member with name 'name'. If several members with the same
1607 * name returns one of them. Returns NULL if no member found. */
1608 ir_entity *get_class_member_by_name(ir_type *clss, ident *name);
1610 /** Overwrites the member at position pos, 0 <= pos < n_member with
1611 * the passed entity. */
1612 void set_class_member(ir_type *clss, ir_entity *member, int pos);
1614 /** Replaces complete member list in class type by the list passed.
1616 * Copies the list passed. This function is necessary to reduce the number of members.
1617 * members is an array of entities, num the size of this array. Sets all
1618 * owners of the members passed to clss. */
1619 void set_class_members(ir_type *clss, ir_entity *members[], int arity);
1621 /** Finds member in the list of members and removes it.
1623 * Shrinks the member list, so iterate from the end!!!
1624 * Does not deallocate the entity. */
1625 void remove_class_member(ir_type *clss, ir_entity *member);
1628 /** Adds subtype as subtype to clss.
1630 * Checks whether clss is a supertype of subtype. If not
1631 * adds also clss as supertype to subtype. */
1632 void add_class_subtype(ir_type *clss, ir_type *subtype);
1634 /** Returns the number of subtypes */
1635 int get_class_n_subtypes(const ir_type *clss);
1637 /** Gets the subtype at position pos, 0 <= pos < n_subtype. */
1638 ir_type *get_class_subtype(ir_type *clss, int pos);
1640 /** Returns the index to access subclass as subtype of class.
1642 * If subclass is no direct subtype of class returns -1.
1644 int get_class_subtype_index(ir_type *clss, const ir_type *subclass);
1646 /** Sets the subtype at position pos, 0 <= pos < n_subtype.
1648 * Does not set the corresponding supertype relation for subtype: this might
1649 * be a different position! */
1650 void set_class_subtype(ir_type *clss, ir_type *subtype, int pos);
1652 /** Finds subtype in the list of subtypes and removes it */
1653 void remove_class_subtype(ir_type *clss, ir_type *subtype);
1655 /* Convenience macros */
1656 #define add_class_derived_type(clss, drvtype) add_class_subtype(clss, drvtype)
1657 #define get_class_n_derived_types(clss) get_class_n_subtypes(clss)
1658 #define get_class_derived_type(clss, pos) get_class_subtype(clss, pos)
1659 #define get_class_derived_type_index(clss, drvtype) get_class_subtype_index(clss, drvtype)
1660 #define set_class_derived_type(clss, drvtype, pos) set_class_subtype(clss, drvtype, pos)
1661 #define remove_class_derived_type(clss, drvtype) remove_class_subtype(clss, drvtype)
1663 /** Adds supertype as supertype to class.
1665 * Checks whether clss is a subtype of supertype. If not
1666 * adds also clss as subtype to supertype. */
1667 void add_class_supertype(ir_type *clss, ir_type *supertype);
1669 /** Returns the number of supertypes */
1670 int get_class_n_supertypes(const ir_type *clss);
1672 /** Returns the index to access superclass as supertype of class.
1674 * If superclass is no direct supertype of class returns -1.
1676 int get_class_supertype_index(ir_type *clss, ir_type *super_clss);
1678 /** Gets the supertype at position pos, 0 <= pos < n_supertype. */
1679 ir_type *get_class_supertype(ir_type *clss, int pos);
1681 /** Sets the supertype at position pos, 0 <= pos < n_supertype.
1683 * Does not set the corresponding subtype relation for supertype: this might
1684 * be at a different position! */
1685 void set_class_supertype(ir_type *clss, ir_type *supertype, int pos);
1687 /** Finds supertype in the list of supertypes and removes it */
1688 void remove_class_supertype(ir_type *clss, ir_type *supertype);
1690 /** Convenience macro */
1691 #define add_class_base_type(clss, basetype) add_class_supertype(clss, basetype)
1692 #define get_class_n_base_types(clss) get_class_n_supertypes(clss)
1693 #define get_class_base_type_index(clss, base_clss) get_class_supertype_index(clss, base_clss)
1694 #define get_class_base_type(clss, pos) get_class_supertype(clss, pos)
1695 #define set_class_base_type(clss, basetype, pos) set_class_supertype(clss, basetype, pos)
1696 #define remove_class_base_type(clss, basetype) remove_class_supertype(clss, basetype)
1698 /** Convenience macro */
1699 #define add_class_base_type(clss, basetype) add_class_supertype(clss, basetype)
1700 #define get_class_n_base_types(clss) get_class_n_supertypes(clss)
1701 #define get_class_base_type_index(clss, base_clss) get_class_supertype_index(clss, base_clss)
1702 #define get_class_base_type(clss, pos) get_class_supertype(clss, pos)
1703 #define set_class_base_type(clss, basetype, pos) set_class_supertype(clss, basetype, pos)
1704 #define remove_class_base_type(clss, basetype) remove_class_supertype(clss, basetype)
1706 /** Returns a human readable string for a peculiarity. */
1707 const char *get_peculiarity_name(ir_peculiarity p);
1709 /** Returns the peculiarity of the class. */
1710 ir_peculiarity get_class_peculiarity(const ir_type *clss);
1711 /** Sets the peculiarity of the class. */
1712 void set_class_peculiarity(ir_type *clss, ir_peculiarity pec);
1714 /** Returns the type info entity of a class. */
1715 ir_entity *get_class_type_info(const ir_type *clss);
1717 /** Set a type info entity for the class. */
1718 void set_class_type_info(ir_type *clss, ir_entity *ent);
1720 /** Returns the size of the virtual function table. */
1721 unsigned get_class_vtable_size(const ir_type *clss);
1723 /** Sets a new size of the virtual function table. */
1724 void set_class_vtable_size(ir_type *clss, unsigned size);
1726 /** Returns non-zero if a class is final. */
1727 int is_class_final(const ir_type *clss);
1729 /** Sets the class final flag. */
1730 void set_class_final(ir_type *clss, int flag);
1732 /** Return non-zero if a class is an interface */
1733 int is_class_interface(const ir_type *clss);
1735 /** Sets the class interface flag. */
1736 void set_class_interface(ir_type *clss, int flag);
1738 /** Return non-zero if a class is an abstract class. */
1739 int is_class_abstract(const ir_type *clss);
1741 /** Sets the class abstract flag. */
1742 void set_class_abstract(ir_type *clss, int flag);
1744 /** Set and get a class' dfn --
1745 @todo This is an undocumented field, subject to change! */
1746 void set_class_dfn(ir_type *clss, int dfn);
1747 int get_class_dfn(const ir_type *clss);
1749 /** Returns true if a type is a class type. */
1750 int is_Class_type(const ir_type *clss);
1753 * @page struct_type Representation of a struct type
1755 * A struct type represents aggregate types that consist of a list
1758 * The following attributes are private to this type kind:
1759 * - member: All entities belonging to this class. This are the fields
1760 * that can have any of the following types: type_class,
1761 * type_struct, type_union, type_array, type_enumeration,
1762 * type_pointer, type_primitive.
1763 * This is a dynamic list that can be grown with an "add_" function,
1765 * This is a dynamic list that can be grown with an "add_" function,
1768 /** Creates a new type struct */
1769 ir_type *new_type_struct(ident *name);
1770 /** Creates a new type struct with debug information. */
1771 ir_type *new_d_type_struct(ident *name, dbg_info* db);
1773 /* --- manipulate private fields of struct --- */
1775 /** Adds the entity as member of the struct. */
1776 void add_struct_member(ir_type *strct, ir_entity *member);
1778 /** Returns the number of members of this struct. */
1779 int get_struct_n_members(const ir_type *strct);
1781 /** Returns the member at position pos, 0 <= pos < n_member */
1782 ir_entity *get_struct_member(const ir_type *strct, int pos);
1784 /** Returns index of member in strct, -1 if not contained. */
1785 int get_struct_member_index(const ir_type *strct, ir_entity *member);
1787 /** Overwrites the member at position pos, 0 <= pos < n_member with
1788 the passed entity. */
1789 void set_struct_member(ir_type *strct, int pos, ir_entity *member);
1791 /** Finds member in the list of members and removes it. */
1792 void remove_struct_member(ir_type *strct, ir_entity *member);
1794 /** Returns true if a type is a struct type. */
1795 int is_Struct_type(const ir_type *strct);
1798 * @page method_type Representation of a method type
1800 * A method type represents a method, function or procedure type.
1801 * It contains a list of the parameter and result types, as these
1802 * are part of the type description. These lists should not
1803 * be changed by a optimization, as a change creates a new method
1804 * type. Therefore optimizations should allocated new method types.
1805 * The set_ routines are only for construction by a frontend.
1807 * - n_params: Number of parameters to the procedure.
1808 * A procedure in FIRM has only call by value parameters.
1810 * - param_type: A list with the types of parameters. This list is ordered.
1811 * The nth type in this list corresponds to the nth element
1812 * in the parameter tuple that is a result of the start node.
1813 * (See ircons.h for more information.)
1815 * - value_param_ents
1816 * A list of entities (whose owner is a struct private to the
1817 * method type) that represent parameters passed by value.
1819 * - n_res: The number of results of the method. In general, procedures
1820 * have zero results, functions one.
1822 * - res_type: A list with the types of parameters. This list is ordered.
1823 * The nth type in this list corresponds to the nth input to
1824 * Return nodes. (See ircons.h for more information.)
1827 * A list of entities (whose owner is a struct private to the
1828 * method type) that represent results passed by value.
1831 /* These macros define the suffixes for the types and entities used
1832 to represent value parameters / results. */
1833 #define VALUE_PARAMS_SUFFIX "val_param"
1834 #define VALUE_RESS_SUFFIX "val_res"
1836 /** Create a new method type.
1838 * @param name the name (ident) of this type
1839 * @param n_param the number of parameters
1840 * @param n_res the number of results
1842 * The arrays for the parameter and result types are not initialized by
1845 ir_type *new_type_method(ident *name, int n_param, int n_res);
1847 /** Create a new method type with debug information.
1849 * @param name the name (ident) of this type
1850 * @param n_param the number of parameters
1851 * @param n_res the number of results
1852 * @param db user defined debug information
1854 * The arrays for the parameter and result types are not initialized by
1857 ir_type *new_d_type_method(ident *name, int n_param, int n_res, dbg_info *db);
1859 /** Clone an existing method type.
1861 * @param tp the method type to clone.
1862 * @param prefix if non-null, will be the prefix for the name of
1865 * @return the cloned method type.
1867 ir_type *clone_type_method(ir_type *tp, ident *prefix);
1869 /* -- manipulate private fields of method. -- */
1871 /** Returns the number of parameters of this method. */
1872 int get_method_n_params(const ir_type *method);
1874 /** Returns the type of the parameter at position pos of a method. */
1875 ir_type *get_method_param_type(ir_type *method, int pos);
1876 /** Sets the type of the parameter at position pos of a method.
1877 Also changes the type in the pass-by-value representation by just
1878 changing the type of the corresponding entity if the representation is constructed. */
1879 void set_method_param_type(ir_type *method, int pos, ir_type *tp);
1880 /** Returns an entity that represents the copied value argument. Only necessary
1881 for compounds passed by value. This information is constructed only on demand. */
1882 ir_entity *get_method_value_param_ent(ir_type *method, int pos);
1884 * Returns a type that represents the copied value arguments if one
1885 * was allocated, else NULL.
1887 ir_type *get_method_value_param_type(const ir_type *method);
1888 /** Returns an ident representing the parameters name. Returns NULL if not set.
1889 For debug support only. */
1890 ident *get_method_param_ident(ir_type *method, int pos);
1891 /** Returns a string representing the parameters name. Returns NULL if not set.
1892 For debug support only. */
1893 const char *get_method_param_name(ir_type *method, int pos);
1894 /** Sets an ident representing the parameters name. For debug support only. */
1895 void set_method_param_ident(ir_type *method, int pos, ident *id);
1897 /** Returns the number of results of a method type. */
1898 int get_method_n_ress(const ir_type *method);
1899 /** Returns the return type of a method type at position pos. */
1900 ir_type *get_method_res_type(ir_type *method, int pos);
1901 /** Sets the type of the result at position pos of a method.
1902 Also changes the type in the pass-by-value representation by just
1903 changing the type of the corresponding entity if the representation is constructed. */
1904 void set_method_res_type(ir_type *method, int pos, ir_type *tp);
1905 /** Returns an entity that represents the copied value result. Only necessary
1906 for compounds passed by value. This information is constructed only on demand. */
1907 ir_entity *get_method_value_res_ent(ir_type *method, int pos);
1910 * Returns a type that represents the copied value results.
1912 ir_type *get_method_value_res_type(const ir_type *method);
1915 * This enum flags the variadicity of methods (methods with a
1916 * variable amount of arguments (e.g. C's printf). Default is
1919 typedef enum variadicity {
1920 variadicity_non_variadic, /**< non variadic */
1921 variadicity_variadic /**< variadic */
1924 /** Returns the null-terminated name of this variadicity. */
1925 const char *get_variadicity_name(variadicity vari);
1927 /** Returns the variadicity of a method. */
1928 variadicity get_method_variadicity(const ir_type *method);
1930 /** Sets the variadicity of a method. */
1931 void set_method_variadicity(ir_type *method, variadicity vari);
1934 * Returns the first variadic parameter index of a type.
1935 * If this index was NOT set, the index of the last parameter
1936 * of the method type plus one is returned for variadic functions.
1937 * Non-variadic function types always return -1 here.
1939 int get_method_first_variadic_param_index(const ir_type *method);
1942 * Sets the first variadic parameter index. This allows to specify
1943 * a complete call type (containing the type of all parameters)
1944 * but still have the knowledge, which parameter must be passed as
1947 void set_method_first_variadic_param_index(ir_type *method, int index);
1949 /** Returns the mask of the additional graph properties. */
1950 unsigned get_method_additional_properties(const ir_type *method);
1952 /** Sets the mask of the additional graph properties. */
1953 void set_method_additional_properties(ir_type *method, unsigned property_mask);
1955 /** Sets one additional graph property. */
1956 void set_method_additional_property(ir_type *method, mtp_additional_property flag);
1959 * Calling conventions: lower 24 bits are the number of register parameters,
1960 * upper 8 encode the calling conventions.
1963 cc_reg_param = 0x01000000, /**< Transmit parameters in registers, else the stack is used.
1964 This flag may be set as default on some architectures. */
1965 cc_last_on_top = 0x02000000, /**< The last non-register parameter is transmitted on top of
1966 the stack. This is equivalent to the pascal
1967 calling convention. If this flag is not set, the first
1968 non-register parameter is used (stdcall or cdecl
1969 calling convention) */
1970 cc_callee_clear_stk = 0x04000000, /**< The callee clears the stack. This forbids variadic
1971 function calls (stdcall). */
1972 cc_this_call = 0x08000000, /**< The first parameter is a this pointer and is transmitted
1973 in a special way. */
1974 cc_compound_ret = 0x10000000, /**< The method returns a compound type. */
1975 cc_frame_on_caller_stk = 0x20000000, /**< The method did not allocate an own stack frame, instead the
1976 caller must reserve size on its own stack. */
1977 cc_bits = (0xFF << 24)/**< The calling convention bits. */
1978 } calling_convention;
1980 /* some often used cases: made as defines because firmjni cannot handle two
1981 equal enum values. */
1983 /** cdecl calling convention */
1984 #define cc_cdecl_set (0)
1985 /** stdcall calling convention */
1986 #define cc_stdcall_set cc_callee_clear_stk
1987 /** fastcall calling convention */
1988 #define cc_fastcall_set (cc_reg_param|cc_callee_clear_stk)
1990 /** Returns the default calling convention for method types. */
1991 unsigned get_default_cc_mask(void);
1994 * check for the CDECL calling convention
1996 #define IS_CDECL(cc_mask) (((cc_mask) & cc_bits) == cc_cdecl_set)
1999 * check for the STDCALL calling convention
2001 #define IS_STDCALL(cc_mask) (((cc_mask) & cc_bits) == cc_stdcall_set)
2004 * check for the FASTCALL calling convention
2006 #define IS_FASTCALL(cc_mask) (((cc_mask) & cc_bits) == cc_fastcall_set)
2009 * Sets the CDECL convention bits.
2011 #define SET_CDECL(cc_mask) (((cc_mask) & ~cc_bits) | cc_cdecl_set)
2014 * Set. the STDCALL convention bits.
2016 #define SET_STDCALL(cc_mask) (((cc_mask) & ~cc_bits) | cc_stdcall_set)
2019 * Sets the FASTCALL convention bits.
2021 #define SET_FASTCALL(cc_mask) (((cc_mask) & ~cc_bits) | cc_fastcall_set)
2023 /** Returns the calling convention of an entities graph. */
2024 unsigned get_method_calling_convention(const ir_type *method);
2026 /** Sets the calling convention of an entities graph. */
2027 void set_method_calling_convention(ir_type *method, unsigned cc_mask);
2029 /** Returns the number of registers parameters, 0 means default. */
2030 unsigned get_method_n_regparams(ir_type *method);
2032 /** Sets the number of registers parameters, 0 means default. */
2033 void set_method_n_regparams(ir_type *method, unsigned n_regs);
2035 /** Returns true if a type is a method type. */
2036 int is_Method_type(const ir_type *method);
2039 * @page union_type Representation of a union (variant) type.
2041 * The union type represents union types. Note that this representation
2042 * resembles the C union type. For tagged variant types like in Pascal or Modula
2043 * a combination of a struct and a union type must be used.
2045 * - n_types: Number of unioned types.
2046 * - members: Entities for unioned types. Fixed length array.
2047 * This is a dynamic list that can be grown with an "add_" function,
2050 /** Creates a new type union. */
2051 ir_type *new_type_union(ident *name);
2053 /** Creates a new type union with debug information. */
2054 ir_type *new_d_type_union(ident *name, dbg_info* db);
2056 /* --- manipulate private fields of struct --- */
2058 /** Returns the number of unioned types of this union */
2059 int get_union_n_members(const ir_type *uni);
2061 /** Adds a new entity to a union type */
2062 void add_union_member(ir_type *uni, ir_entity *member);
2064 /** Returns the entity at position pos of a union */
2065 ir_entity *get_union_member(const ir_type *uni, int pos);
2067 /** Returns index of member in uni, -1 if not contained. */
2068 int get_union_member_index(const ir_type *uni, ir_entity *member);
2070 /** Overwrites a entity at position pos in a union type. */
2071 void set_union_member(ir_type *uni, int pos, ir_entity *member);
2073 /** Finds member in the list of members and removes it. */
2074 void remove_union_member(ir_type *uni, ir_entity *member);
2076 /** Returns true if a type is a union type. */
2077 int is_Union_type(const ir_type *uni);
2080 * @page array_type Representation of an array type
2082 * The array type represents rectangular multi dimensional arrays.
2083 * The constants representing the bounds must be allocated to
2084 * get_const_code_irg() by setting current_ir_graph accordingly.
2086 * - n_dimensions: Number of array dimensions.
2087 * - *lower_bound: Lower bounds of dimensions. Usually all 0.
2088 * - *upper_bound: Upper bounds or dimensions.
2089 * - *element_type: The type of the array elements.
2090 * - *element_ent: An entity for the array elements to be used for
2091 * element selection with Sel.
2093 * Do we need several entities? One might want
2094 * to select a dimension and not a single element in case of multi
2095 * dimensional arrays.
2098 /** Create a new type array.
2100 * Sets n_dimension to dimension and all dimension entries to NULL.
2101 * Initializes order to the order of the dimensions.
2102 * The entity for array elements is built automatically.
2103 * Set dimension sizes after call to constructor with set_* routines.
2105 ir_type *new_type_array(ident *name, int n_dims, ir_type *element_type);
2107 /** Create a new type array with debug information.
2109 * Sets n_dimension to dimension and all dimension entries to NULL.
2110 * Initializes order to the order of the dimensions.
2111 * The entity for array elements is built automatically.
2112 * Set dimension sizes after call to constructor with set_* routines.
2113 * A legal array type must have at least one dimension set.
2115 ir_type *new_d_type_array(ident *name, int n_dims, ir_type *element_type, dbg_info* db);
2117 /* --- manipulate private fields of array type --- */
2119 /** Returns the number of array dimensions of this type. */
2120 int get_array_n_dimensions(const ir_type *array);
2123 * Allocates Const nodes of mode_Is for one array dimension.
2124 * Upper bound in Firm is the element next to the last, i.e. [lower,upper[
2126 void set_array_bounds_int(ir_type *array, int dimension, int lower_bound,
2129 * Sets the bounds for one array dimension.
2130 * Upper bound in Firm is the element next to the last, i.e. [lower,upper[
2132 void set_array_bounds(ir_type *array, int dimension, ir_node *lower_bound,
2133 ir_node *upper_bound);
2134 /** Sets the lower bound for one array dimension, i.e. [lower,upper[ */
2135 void set_array_lower_bound(ir_type *array, int dimension, ir_node *lower_bound);
2137 /** Allocates Const nodes of mode_Is for the lower bound of an array
2138 dimension, i.e. [lower,upper[ */
2139 void set_array_lower_bound_int(ir_type *array, int dimension, int lower_bound);
2141 /** Sets the upper bound for one array dimension, i.e. [lower,upper[ */
2142 void set_array_upper_bound(ir_type *array, int dimension, ir_node *upper_bound);
2144 /** Allocates Const nodes of mode_Is for the upper bound of an array
2145 dimension, i.e. [lower,upper[. */
2146 void set_array_upper_bound_int(ir_type *array, int dimension, int upper_bound);
2148 /** Returns true if lower bound != Unknown. */
2149 int has_array_lower_bound(const ir_type *array, int dimension);
2150 /** Returns the lower bound of an array. */
2151 ir_node *get_array_lower_bound(const ir_type *array, int dimension);
2152 /** Works only if bound is Const node with tarval that can be converted to long. */
2153 long get_array_lower_bound_int(const ir_type *array, int dimension);
2154 /** returns true if lower bound != Unknown */
2155 int has_array_upper_bound(const ir_type *array, int dimension);
2156 /** Returns the upper bound of an array. */
2157 ir_node *get_array_upper_bound(const ir_type *array, int dimension);
2158 /** Works only if bound is Const node with tarval that can be converted to long. */
2159 long get_array_upper_bound_int(const ir_type *array, int dimension);
2161 /** Sets an array dimension to a specific order. */
2162 void set_array_order(ir_type *array, int dimension, int order);
2164 /** Returns the order of an array dimension. */
2165 int get_array_order(const ir_type *array, int dimension);
2167 /** Find the array dimension that is placed at order order. */
2168 int find_array_dimension(const ir_type *array, int order);
2170 /** Sets the array element type. */
2171 void set_array_element_type(ir_type *array, ir_type* tp);
2173 /** Gets the array element type. */
2174 ir_type *get_array_element_type(ir_type *array);
2176 /** Sets the array element entity. */
2177 void set_array_element_entity(ir_type *array, ir_entity *ent);
2179 /** Get the array element entity. */
2180 ir_entity *get_array_element_entity(const ir_type *array);
2182 /** Returns true if a type is an array type. */
2183 int is_Array_type(const ir_type *array);
2186 * @page enumeration_type Representation of an enumeration type
2188 * Enumeration types need not necessarily be represented explicitly
2189 * by Firm types, as the frontend can lower them to integer constants as
2190 * well. For debugging purposes or similar tasks this information is useful.
2191 * The type state layout_fixed is set, if all enumeration constant have
2192 * there tarvals assigned. Until then
2194 * - *const: The target values representing the constants used to
2195 * represent individual enumerations.
2198 /** Create a new type enumeration -- set the enumerators independently. */
2199 ir_type *new_type_enumeration(ident *name, int n_enums);
2201 /** Create a new type enumeration with debug information -- set the enumerators independently. */
2202 ir_type *new_d_type_enumeration(ident *name, int n_enums, dbg_info *db);
2204 /* --- manipulate fields of enumeration type. --- */
2206 /** Set an enumeration constant to a enumeration type at a given position. */
2207 void set_enumeration_const(ir_type *enumeration, int pos, ident *nameid, tarval *con);
2209 /** Returns the number of enumeration values of this enumeration */
2210 int get_enumeration_n_enums(const ir_type *enumeration);
2212 /** Returns the enumeration constant at a given position. */
2213 ir_enum_const *get_enumeration_const(const ir_type *enumeration, int pos);
2215 /** Returns the enumeration type owner of an enumeration constant. */
2216 ir_type *get_enumeration_owner(const ir_enum_const *enum_cnst);
2218 /** Sets the enumeration constant value. */
2219 void set_enumeration_value(ir_enum_const *enum_cnst, tarval *con);
2221 /** Returns the enumeration constant value. */
2222 tarval *get_enumeration_value(const ir_enum_const *enum_cnst);
2224 /** Assign an ident to an enumeration constant. */
2225 void set_enumeration_nameid(ir_enum_const *enum_cnst, ident *id);
2227 /** Returns the assigned ident of an enumeration constant. */
2228 ident *get_enumeration_nameid(const ir_enum_const *enum_cnst);
2230 /** Returns the assigned name of an enumeration constant. */
2231 const char *get_enumeration_name(const ir_enum_const *enum_cnst);
2233 /** Returns true if a type is a enumeration type. */
2234 int is_Enumeration_type(const ir_type *enumeration);
2237 * @page pointer_type Representation of a pointer type
2239 * The mode of the pointer type must be a reference mode.
2242 * - points_to: The type of the entity this pointer points to.
2245 /** Creates a new type pointer. */
2246 ir_type *new_type_pointer(ident *name, ir_type *points_to, ir_mode *ptr_mode);
2248 /** Creates a new type pointer with debug information. */
2249 ir_type *new_d_type_pointer(ident *name, ir_type *points_to, ir_mode *ptr_mode, dbg_info* db);
2251 /* --- manipulate fields of type_pointer --- */
2253 /** Sets the type to which a pointer points to. */
2254 void set_pointer_points_to_type(ir_type *pointer, ir_type *tp);
2256 /** Returns the type to which a pointer points to. */
2257 ir_type *get_pointer_points_to_type(ir_type *pointer);
2259 /** Returns true if a type is a pointer type. */
2260 int is_Pointer_type(const ir_type *pointer);
2262 /** Returns the first pointer type that has as points_to tp.
2263 * Not efficient: O(#types).
2264 * If not found returns firm_unknown_type. */
2265 ir_type *find_pointer_type_to_type(ir_type *tp);
2268 * @page primitive_type Representation of a primitive type
2270 * Primitive types are types that represent atomic data values that
2271 * map directly to modes. They don't have private attributes. The
2272 * important information they carry is held in the common mode field.
2274 /** Creates a new primitive type. */
2275 ir_type *new_type_primitive(ident *name, ir_mode *mode);
2277 /** Creates a new primitive type with debug information. */
2278 ir_type *new_d_type_primitive(ident *name, ir_mode *mode, dbg_info* db);
2280 /** Returns true if a type is a primitive type. */
2281 int is_Primitive_type(const ir_type *primitive);
2283 /** Return the base type of a primitive (bitfield) type or NULL if none. */
2284 ir_type *get_primitive_base_type(ir_type *tp);
2286 /** Sets the base type of a primitive (bitfield) type. */
2287 void set_primitive_base_type(ir_type *tp, ir_type *base_tp);
2290 * @page none_type The None type
2292 * This type is an auxiliary type dedicated to support type analyses.
2294 * The none type represents that there is no type. The type can be used to
2295 * initialize fields of type* that actually can not contain a type or that
2296 * are initialized for an analysis. There exists exactly one type none.
2297 * This type is not on the type list in ir_prog. It is
2298 * allocated when initializing the type module.
2300 * The following values are set:
2302 * - name: "type_none"
2303 * - state: layout_fixed
2306 /** A variable that contains the only none type. */
2307 extern ir_type *firm_none_type;
2309 /** Returns the none type. */
2310 ir_type *get_none_type(void);
2313 * @page unknown_type The Unknown type
2315 * This type is an auxiliary type dedicated to support type analyses.
2317 * The unknown type represents that there could be a type, but it is not
2318 * known. This type can be used to initialize fields before an analysis (not known
2319 * yet) or to represent the top of a lattice (could not be determined). There exists
2320 * exactly one type unknown. This type is not on the type list in ir_prog. It is
2321 * allocated when initializing the type module.
2323 * The following values are set:
2325 * - name: "type_unknown"
2326 * - state: layout_fixed
2329 /** A variable that contains the only unknown type. */
2330 extern ir_type *firm_unknown_type;
2332 /** Returns the unknown type. */
2333 ir_type *get_unknown_type(void);
2337 * Checks whether a type is atomic.
2338 * @param tp any type
2339 * @return true if type is primitive, pointer or enumeration
2341 int is_atomic_type(const ir_type *tp);
2343 /* --- Support for compound types --- */
2346 * Gets the number of elements in a Firm compound type.
2348 * This is just a comfortability function, because structs and
2349 * classes can often be treated be the same code, but they have
2350 * different access functions to their members.
2352 * @param tp The type (must be struct, union or class).
2354 * @return Number of members in the compound type.
2356 int get_compound_n_members(const ir_type *tp);
2359 * Gets the member of a Firm compound type at position pos.
2361 * @param tp The type (must be struct, union or class).
2362 * @param pos The number of the member.
2364 * @return The member entity at position pos.
2366 * @see get_compound_n_members() for justification of existence.
2368 ir_entity *get_compound_member(const ir_type *tp, int pos);
2370 /** Returns index of member in tp, -1 if not contained. */
2371 int get_compound_member_index(const ir_type *tp, ir_entity *member);
2374 * Checks whether a type is a compound type.
2376 * @param tp - any type
2378 * @return true if the type is class, structure, union or array type.
2380 int is_compound_type(const ir_type *tp);
2383 * Checks, whether a type is a frame type.
2385 int is_frame_type(const ir_type *tp);
2388 * Checks, whether a type is a value parameter type.
2390 int is_value_param_type(const ir_type *tp);
2393 * Checks, whether a type is a lowered type.
2395 int is_lowered_type(const ir_type *tp);
2398 * Makes a new frame type. Frame types are class types,
2399 * so all class access functions work.
2400 * Frame types are not in the global list of types.
2402 ir_type *new_type_frame(ident *name);
2405 * Makes a clone of a frame type.
2406 * Sets entity links from old frame entities to new onces and
2409 ir_type *clone_frame_type(ir_type *type);
2412 * Sets a lowered type for a type. This sets both associations
2413 * and marks lowered_type as a "lowered" one.
2415 void set_lowered_type(ir_type *tp, ir_type *lowered_type);
2418 * Gets the lowered/unlowered type of a type or NULL if this type
2419 * has no lowered/unlowered one.
2421 ir_type *get_associated_type(const ir_type *tp);
2424 * Allocate an area of size bytes aligned at alignment
2425 * at the start or the end of a frame type.
2426 * The frame type must already have a fixed layout.
2428 * @param frame_type a frame type
2429 * @param size the size of the entity
2430 * @param alignment the alignment of the entity
2431 * @param at_start if true, put the area at the frame type's start, else at end
2433 * @return the entity representing the area
2435 ir_entity *frame_alloc_area(ir_type *frame_type, int size, unsigned alignment, int at_start);
2437 /*-----------------------------------------------------------------*/
2439 /*-----------------------------------------------------------------*/
2442 * Outputs a unique number for this type if libfirm is compiled for
2443 * debugging, (configure with --enable-debug) else returns the address
2444 * of the type cast to long.
2446 long get_type_nr(const ir_type *tp);
2448 /* ------------------------------------------------------------------------ */
2450 /** Type for a function that compares two types.
2452 * @param tp1 The first type to compare.
2453 * @param tp2 The second type to compare.
2455 typedef int (compare_types_func_t)(const void *tp1, const void *tp2);
2457 /** Compares two types by their name.
2459 * Compares the opcode and the name of the types. If these are
2460 * equal returns 0, else non-zero.
2462 int compare_names(const void *tp1, const void *tp2);
2464 /** Compares two types strict.
2466 * returns 0 if tp1 == tp2, else non-zero
2468 int compare_strict(const void *tp1, const void *tp2);
2470 /* ------------------------------------------------------------------------ */
2472 /** Type for a function that computes a hash value for a type.
2474 * @param tp The type to compute a hash for.
2476 typedef int (hash_types_func_t)(ir_type *tp);
2478 /** Computes a hash value by the type name.
2480 * Uses the name of the type and the type opcode to compute the hash.
2482 int firm_hash_name(ir_type *tp);
2484 /* ------------------------------------------------------------------------ */
2486 /** Finalize type construction.
2488 * Indicate that a type is so far completed that it can be
2489 * distinguished from other types. Mature_type hashes the type into a
2490 * table. It uses the function in compare_types_func to compare the
2493 * If it finds a type identical to tp it returns this type. It turns
2494 * tp into the Id type. All places formerly pointing to tp will now
2495 * point to the found type. All entities of tp now refer to the found
2496 * type as their owner, but they are not a member of this type. This
2497 * is invalid firm -- the entities must be replaced by entities of the
2498 * found type. The Id type will be removed from the representation
2499 * automatically, but within an unknown time span. It occupies memory
2502 * @param tp The type to mature.
2504 ir_type *mature_type(ir_type *tp);
2506 /** Finalize type construction.
2508 * Indicate that a type is so far completed that it can be
2509 * distinguished from other types. mature_type() hashes the type into a
2510 * table. It uses the function in compare_types_func to compare the
2513 * If it finds a type identical to tp it returns this type. It frees
2514 * type tp and all its entities.
2516 * @param tp The type to mature.
2518 ir_type *mature_type_free(ir_type *tp);
2520 /** Finalize type construction.
2522 * Indicate that a type is so far completed that it can be
2523 * distinguished from other types. Mature_type hashes the type into a
2524 * table. It uses the function in compare_types_func to compare the
2527 * If it find a type identical to tp it returns this type. It frees
2528 * the entities and turns the type into an Id type. All places
2529 * formerly pointing to tp will now point to the found type. The Id
2530 * type will be removed from the representation automatically, but
2531 * within an unknown time span. It occupies memory for this time.
2533 * @param tp The type to mature.
2535 ir_type *mature_type_free_entities(ir_type *tp);
2538 * The interface type for the type identify module;
2540 typedef struct _type_identify_if_t {
2541 compare_types_func_t *cmp; /**< The function that should be used to compare two types.
2542 If NULL, compare_strict() will be used. */
2543 hash_types_func_t *hash; /**< The function that should be used to calculate a hash
2544 value of a type. If NULL, hash_name() will be used. */
2545 } type_identify_if_t;
2548 * Initialise the type identifier module.
2550 * @param ti_if The interface functions for this module.
2552 * If the parameter ti_if is NULL, the default functions compare_strict() and
2553 * firm_hash_name() will be used.
2555 void init_type_identify(type_identify_if_t *ti_if);
2557 /** A data type to treat types and entities as the same. */
2559 ir_type *typ; /**< points to a type */
2560 ir_entity *ent; /**< points to an entity */
2563 /** Type of argument functions for type walkers.
2565 * @param tore points to the visited type or entity
2566 * @param env free environment pointer
2568 typedef void type_walk_func(type_or_ent *tore, void *env);
2570 /** The class walk function
2572 * @param clss points to the visited class
2573 * @param env free environment pointer
2575 typedef void class_walk_func(ir_type *clss, void *env);
2577 /** Touches every type and entity in unspecified order. If new
2578 * types/entities are created during the traversal these will
2580 * Does not touch frame types or types for value params ... */
2581 void type_walk(type_walk_func *pre, type_walk_func *post, void *env);
2583 /** Walks over all type information reachable from an ir graph.
2585 * Walks over all type information reachable from irg, i.e., starts a
2586 * type walk at the irgs entity, the irgs frame type and all types and
2587 * entities that are attributes to firm nodes. */
2588 void type_walk_irg(ir_graph *irg, type_walk_func *pre, type_walk_func *post,
2592 Touches every class in specified order:
2593 - first the super class
2594 - second the class itself
2595 - third the sub classes. If new classes are created
2596 during the traversal these will be visited, too.
2598 @todo should be named class-walk
2600 @deprecated will be removed?
2602 void type_walk_super2sub(type_walk_func *pre, type_walk_func *post, void *env);
2604 /** Walker for class types in inheritance order.
2606 * Touches every class in specified order:
2607 * - first the super class
2608 * - second the class itself
2609 * If new classes are created during the traversal these
2610 * will be visited, too.
2611 * Starts the walk at arbitrary classes.
2612 * Executes pre when first visiting a class. Executes post after
2613 * visiting all superclasses.
2615 * The arguments pre, post, env may be NULL. */
2616 void type_walk_super(type_walk_func *pre, type_walk_func *post, void *env);
2618 /** Same as type_walk_super2sub, but visits only class types.
2619 Executes pre for a class if all superclasses have been visited.
2620 Then iterates to subclasses. Executes post after return from
2622 Does not visit global type, frame types.
2624 @bug ?? something is wrong with this.
2626 void class_walk_super2sub(class_walk_func *pre, class_walk_func *post,
2630 * the entity walk function. A function type for entity walkers.
2632 * @param ent points to the visited entity
2633 * @param env free environment pointer
2635 typedef void entity_walk_func(ir_entity *ent, void *env);
2638 * Walks over all entities in the type.
2640 * @param tp the type
2641 * @param doit the entity walker function
2642 * @param env environment, will be passed to the walker function
2644 void walk_types_entities(ir_type *tp, entity_walk_func *doit, void *env);
2647 * If we have the closed world assumption, we can calculate the
2648 * finalization of classes and entities by inspecting the class hierarchy.
2649 * After this is done, all classes and entities that are not overridden
2650 * anymore have the final property set.
2652 void types_calc_finalization(void);