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 * Supported image sections.
750 * Currently only methods can be placed in different sections.
753 section_text, /**< The code segment. This is the default for methods. */
754 section_constructors /**< The constructor section. */
757 /** Returns the section of a method. */
758 ir_img_section get_method_img_section(const ir_entity *method);
760 /** Sets the section of a method. */
761 void set_method_img_section(ir_entity *method, ir_img_section section);
765 * @page tyop type operations
766 * This module specifies the kinds of types available in firm.
768 * They are called type opcodes. These include classes, structs, methods, unions,
769 * arrays, enumerations, pointers and primitive types.
770 * Special types with own opcodes are the id type, a type representing an unknown
771 * type and a type used to specify that something has no type.
777 * An enum for the type kinds.
778 * For each type kind exists a typecode to identify it.
781 tpo_uninitialized = 0, /* not a type opcode */
782 tpo_class, /**< A class type. */
783 tpo_struct, /**< A struct type. */
784 tpo_method, /**< A method type. */
785 tpo_union, /**< An union type. */
786 tpo_array, /**< An array type. */
787 tpo_enumeration, /**< An enumeration type. */
788 tpo_pointer, /**< A pointer type. */
789 tpo_primitive, /**< A primitive type. */
790 tpo_id, /**< Special Id tag used for type replacement. */
791 tpo_none, /**< Special type for the None type. */
792 tpo_unknown, /**< Special code for the Unknown type. */
793 tpo_max /* not a type opcode */
797 * A structure containing information about a kind of type.
798 * A structure containing information about a kind of type. So far
799 * this is only the kind name, an enum for case-switching and some
802 * @see get_tpop_name(), get_tpop_code(), get_tpop_ident()
804 typedef struct tp_op tp_op;
808 * Returns the string for the type opcode.
810 * @param op The type opcode to get the string from.
811 * @return a string. (@todo Null terminated?)
813 const char *get_tpop_name(const tp_op *op);
816 * Returns an enum for the type opcode.
818 * @param op The type opcode to get the enum from.
821 tp_opcode get_tpop_code(const tp_op *op);
824 * Returns the ident for the type opcode.
826 * @param op The type opcode to get the ident from.
829 ident *get_tpop_ident(const tp_op *op);
832 * This type opcode marks that the corresponding type is a class type.
834 * Consequently the type refers to supertypes, subtypes and entities.
835 * Entities can be any fields, but also methods.
836 * @@@ value class or not???
837 * This struct is dynamically allocated but constant for the lifetime
840 extern tp_op *type_class;
841 tp_op *get_tpop_class(void);
844 * This type opcode marks that the corresponding type is a compound type
847 * Consequently the type refers to a list of entities
848 * which may not be methods (but pointers to methods).
849 * This struct is dynamically allocated but constant for the lifetime
852 extern tp_op *type_struct;
853 tp_op *get_tpop_struct(void);
856 * This type opcode marks that the corresponding type is a method type.
858 * Consequently it refers to a list of arguments and results.
859 * This struct is dynamically allocated but constant for the lifetime
862 extern tp_op *type_method;
863 tp_op *get_tpop_method(void);
866 * This type opcode marks that the corresponding type is a union type.
868 * Consequently it refers to a list of unioned types.
869 * This struct is dynamically allocated but constant for the lifetime
872 extern tp_op *type_union;
873 tp_op *get_tpop_union(void);
876 * This type opcode marks that the corresponding type is an array type.
878 * Consequently it contains a list of dimensions (lower and upper bounds)
879 * and an element type.
880 * This struct is dynamically allocated but constant for the lifetime
883 extern tp_op *type_array;
884 tp_op *get_tpop_array(void);
887 * This type opcode marks that the corresponding type is an enumeration type.
889 * Consequently it contains a list of idents for the enumeration identifiers
890 * and a list of target values that are the constants used to implement
892 * This struct is dynamically allocated but constant for the lifetime
895 extern tp_op *type_enumeration;
896 tp_op *get_tpop_enumeration(void);
899 * This type opcode marks that the corresponding type is a pointer type.
901 * It contains a reference to the type the pointer points to.
902 * This struct is dynamically allocated but constant for the lifetime
905 extern tp_op *type_pointer;
906 tp_op *get_tpop_pointer(void);
909 * This type opcode marks that the corresponding type is a primitive type.
911 * Primitive types are types that are directly mapped to target machine
913 * This struct is dynamically allocated but constant for the lifetime
916 extern tp_op *type_primitive;
917 tp_op *get_tpop_primitive(void);
920 * This type opcode is an auxiliary opcode dedicated to support transformations
921 * of the type structure.
923 * If a type is changed to another type with another
924 * opcode the new type will be allocated with new memory. All nodes refering
925 * to the old type need to be changed to refer to the new one. This is simplified
926 * by turning the old type into an id type that merely forwards to the new type
927 * that now replaces the old one.
928 * type_ids should never be visible out of the type module. All access routines
929 * should automatically check for type_id and eventually follow the forward in
930 * type_id. Two types are exchanged by a call to exchange_types.
931 * If a type_id is visible externally report this as bug. If it is assured that
932 * this never happens this extern variable can be moved to tpop_t.h.
933 * This struct is dynamically allocated but constant for the lifetime
936 extern tp_op *type_id;
937 tp_op *get_tpop_id(void);
940 * This type opcode is an auxiliary opcode dedicated to support type analyses.
942 * Types with this opcode represents that there is no type.
943 * The type can be used to initialize fields of the type* that actually can not
944 * contain a type or that are initialized for an analysis. There exists exactly
945 * one type with this opcode.
947 extern tp_op *tpop_none;
948 tp_op *get_tpop_none(void);
951 * This type opcode is an auxiliary opcode dedicated to support type analyses.
953 * Types with this opcode represents that there could be a type, but it is not
954 * known. This type can be used to initialize fields before an analysis (not known
955 * yet) or to represent the top of a lattice (could not be determined). There exists
956 * exactly one type with this opcode.
958 extern tp_op *tpop_unknown;
959 tp_op *get_tpop_unknown(void);
961 /* ----------------------------------------------------------------------- */
962 /* Classify pairs of types/entities in the inheritance relations. */
963 /* ----------------------------------------------------------------------- */
965 /** Returns true if low is subclass of high.
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 int is_SubClass_of(ir_type *low, ir_type *high);
973 /** Subclass 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 subclasses, returns true, else false. Can also be called with
978 * two class types. */
979 int is_SubClass_ptr_of(ir_type *low, ir_type *high);
981 /** Returns true if high is superclass of low.
983 * Low is a subclass of high if low == high or if low is a subclass of
984 * a subclass of high. I.e, we search in all subtypes of high for low.
985 * @@@ this can be implemented more efficient if we know the set of all
986 * subclasses of high. */
987 #define is_SuperClass_of(high, low) is_SubClass_of(low, high)
989 /** Superclass check for pointers to classes.
991 * Dereferences at both types the same amount of pointer types (as
992 * many as possible). If the remaining types are both class types
993 * and superclasses, returns true, else false. Can also be called with
994 * two class types. */
995 #define is_SuperClass_ptr_of(low, high) is_SubClass_ptr_of(high, low)
997 /** Returns true if high is (transitive) overwritten by low.
999 * Returns false if high == low. */
1000 int is_overwritten_by(ir_entity *high, ir_entity *low);
1002 /** Resolve polymorphism in the inheritance relation.
1004 * Returns the dynamically referenced entity if the static entity and the
1005 * dynamic type are given.
1006 * Searches downwards in overwritten tree. */
1007 ir_entity *resolve_ent_polymorphy(ir_type *dynamic_class, ir_entity* static_ent);
1009 /* ----------------------------------------------------------------------- */
1010 /* Resolve implicit inheritance. */
1011 /* ----------------------------------------------------------------------- */
1013 /** Default name mangling for inherited entities.
1015 * Returns an ident that consists of the name of type followed by an
1016 * underscore and the name (not ld_name) of the entity. */
1017 ident *default_mangle_inherited_name(ir_entity *ent, ir_type *clss);
1019 /** Type of argument functions for inheritance resolver.
1021 * @param ent The entity in the super type that will be overwritten
1022 * by the newly generated entity, for which this name is
1024 * @param clss The class type in which the new entity will be placed.
1026 typedef ident *mangle_inherited_name_func(ir_entity *ent, ir_type *clss);
1028 /** Resolve implicit inheritance.
1030 * Resolves the implicit inheritance supplied by firm. Firm defines,
1031 * that each entity that is not overwritten in a subclass is
1032 * inherited to this subclass without change implicitly. This
1033 * function generates entities that explicitly represent this
1034 * inheritance. It generates for each entity overwriting entities in
1035 * all subclasses of the owner of the entity, if the entity is not
1036 * overwritten in that subclass.
1038 * The name of the new entity is generated with the function passed.
1039 * If the function is NULL, the default_mangle_inherited_name() is
1042 * This function was moved here from firmlower 3/2005.
1044 void resolve_inheritance(mangle_inherited_name_func *mfunc);
1047 /* ----------------------------------------------------------------------- */
1048 /* The transitive closure of the subclass/superclass and */
1049 /* overwrites/overwrittenby relation. */
1051 /* A walk over the ir (O(#types+#entities)) computes the transitive */
1052 /* closure. Adding a new type/entity or changing the basic relations in */
1053 /* some other way invalidates the transitive closure, i.e., it is not */
1054 /* updated by the basic functions. */
1056 /* The transitive edges are held in a set, not in an array as the */
1057 /* underlying relation. */
1059 /* Do the sets contain the node itself? I assume NOT! */
1060 /* ----------------------------------------------------------------------- */
1062 /** The state of the transitive closure.
1064 * @todo: we could manage the state for each relation separately. Invalidating
1065 * the entity relations does not mean invalidating the class relation. */
1067 inh_transitive_closure_none, /**< Closure is not computed, can not be accessed. */
1068 inh_transitive_closure_valid, /**< Closure computed and valid. */
1069 inh_transitive_closure_invalid, /**< Closure invalid, but can be accessed. */
1070 inh_transitive_closure_max /**< Invalid value. */
1071 } inh_transitive_closure_state;
1073 void set_irp_inh_transitive_closure_state(inh_transitive_closure_state s);
1074 void invalidate_irp_inh_transitive_closure_state(void);
1075 inh_transitive_closure_state get_irp_inh_transitive_closure_state(void);
1078 /** Compute transitive closure of the subclass/superclass and
1079 * overwrites/overwrittenby relation.
1081 * This function walks over the ir (O(#types+#entities)) to compute the
1082 * transitive closure. */
1083 void compute_inh_transitive_closure(void);
1085 /** Free memory occupied by the transitive closure information. */
1086 void free_inh_transitive_closure(void);
1089 /* - subtype ------------------------------------------------------------- */
1091 /** Iterate over all transitive subtypes. */
1092 ir_type *get_class_trans_subtype_first(const ir_type *tp);
1093 ir_type *get_class_trans_subtype_next(const ir_type *tp);
1094 int is_class_trans_subtype(const ir_type *tp, const ir_type *subtp);
1096 /* - supertype ----------------------------------------------------------- */
1098 /** Iterate over all transitive supertypes. */
1099 ir_type *get_class_trans_supertype_first(const ir_type *tp);
1100 ir_type *get_class_trans_supertype_next(const ir_type *tp);
1102 /* - overwrittenby ------------------------------------------------------- */
1104 /** Iterate over all entities that transitive overwrite this entities. */
1105 ir_entity *get_entity_trans_overwrittenby_first(const ir_entity *ent);
1106 ir_entity *get_entity_trans_overwrittenby_next(const ir_entity *ent);
1108 /* - overwrites ---------------------------------------------------------- */
1110 /** Iterate over all transitive overwritten entities. */
1111 ir_entity *get_entity_trans_overwrites_first(const ir_entity *ent);
1112 ir_entity *get_entity_trans_overwrites_next(const ir_entity *ent);
1115 /* ----------------------------------------------------------------------- */
1116 /** The state of Cast operations that cast class types or pointers to class
1119 * The state expresses, how far Cast operations conform with the class
1123 * class B1 extends A {}
1124 * class B2 extends A {}
1125 * class C extends B1 {}
1126 * normalized: Cast operations conform with the inheritance relation.
1127 * I.e., the type of the operand of a Cast is either a super= or a sub-
1128 * type of the type casted to. Example: (A)((B2) (new C())).
1129 * transitive: Cast operations conform with the transitive inheritance
1130 * relation. Example: (A)(new C()).
1131 * any: Cast operations do not conform with the transitive inheritance
1132 * relation. Example: (B2)(new B1())
1136 /* ----------------------------------------------------------------------- */
1138 /** Flags for class cast state.
1140 * The state in irp is always smaller or equal to the state of any
1143 * We rely on the ordering of the enum. */
1145 ir_class_casts_any = 0, /**< There are class casts that do not cast in conformance with
1146 the class hierarchy. @@@ So far this does not happen in Firm. */
1147 ir_class_casts_transitive = 1, /**< Class casts conform to transitive inheritance edges. Default. */
1148 ir_class_casts_normalized = 2, /**< Class casts conform to inheritance edges. */
1149 ir_class_casts_state_max
1150 } ir_class_cast_state;
1151 char *get_class_cast_state_string(ir_class_cast_state s);
1153 void set_irg_class_cast_state(ir_graph *irg, ir_class_cast_state s);
1154 ir_class_cast_state get_irg_class_cast_state(ir_graph *irg);
1155 void set_irp_class_cast_state(ir_class_cast_state s);
1156 ir_class_cast_state get_irp_class_cast_state(void);
1158 /** Verify the class cast state of an irg.
1160 * Asserts if state is to high, outputs warning if state is to low
1161 * and firm verbosity is set.
1163 void verify_irg_class_cast_state(ir_graph *irg);
1166 * possible trvrfy() error codes
1168 enum trvrfy_error_codes {
1169 no_error = 0, /**< no error */
1170 error_ent_not_cont, /**< overwritten entity not in superclass */
1171 error_null_mem, /**< compound contains NULL member */
1172 error_const_on_wrong_irg, /**< constant placed on wrong IRG */
1173 error_existent_entity_without_irg, /**< Method entities with pecularity_exist must have an irg */
1174 error_wrong_ent_overwrites, /**< number of entity overwrites exceeds number of class overwrites */
1175 error_inherited_ent_without_const, /**< inherited method entity not pointing to existent entity */
1176 error_glob_ent_allocation, /**< wrong allocation of a global entity */
1177 error_ent_const_mode, /**< Mode of constant in entity did not match entities type. */
1178 error_ent_wrong_owner /**< Mode of constant in entity did not match entities type. */
1185 * 0 if no error encountered
1187 int check_type(ir_type *tp);
1190 * Check an entity. Currently, we check only if initialized constants
1191 * are build on the const irg graph.
1194 * 0 if no error encountered
1195 * != 0 a trvrfy_error_codes code
1197 int check_entity(ir_entity *ent);
1200 * Walks the type information and performs a set of sanity checks.
1202 * Currently, the following checks are executed:
1203 * - values of initialized entities must be allocated on the constant IRG
1204 * - class types: doesn't have NULL members
1205 * - class types: all overwrites are existent in the super type
1208 * 0 if graph is correct
1214 * If NDEBUG is defined performs nothing, else calls the tr_vrfy() function.
1219 #define TR_VRFY() tr_vrfy()
1225 * This module supplies routines that support changing the type graph.
1228 /** Replaces one type by the other.
1230 * Old type is replaced by new_type. All references to old_type
1231 * now point to new_type. The memory for the old type is destroyed,
1232 * but still used. Therefore it is not freed.
1233 * All referenced to this memory will be lost after a certain while.
1234 * An exception is the list of types in irp (irprog.h).
1235 * In the future there might be a routine to recover the memory, but
1236 * this will be at considerable runtime cost.
1238 * @param old_type - The old type that shall be replaced by the new type.
1239 * @param new_type - The new type that will replace old_type.
1242 void exchange_types(ir_type *old_type, ir_type *new_type);
1244 /** Skip id types until a useful type is reached.
1246 * @param tp - A type of arbitrary kind.
1249 * tp if it is not an id type.
1250 * If tp is an id type returns the real type it stands for.
1252 ir_type *skip_tid(ir_type *tp);
1255 * @page type representation of types
1257 * Datastructure to hold type information.
1259 * This module supplies a datastructure to represent all types
1260 * known in the compiled program. This includes types specified
1261 * in the program as well as types defined by the language. In the
1262 * view of the intermediate representation there is no difference
1263 * between these types. Finally it specifies some auxiliary types.
1265 * There exist several kinds of types, arranged by the structure of
1266 * the type. A type is described by a set of attributes. Some of
1267 * these attributes are common to all types, others depend on the
1270 * Types are different from the modes defined in irmode: Types are
1271 * on the level of the programming language, modes at the level of
1272 * the target processor.
1277 #include "typerep.h"
1279 /** Frees all entities associated with a type.
1280 * Does not free the array entity.
1281 * Warning: ensure these entities are not referenced anywhere else.
1283 void free_type_entities(ir_type *tp);
1285 /** Frees the memory used by the type.
1287 * Removes the type from the type list. Does not free the entities
1288 * belonging to the type, except for the array element entity. Does
1289 * not free if tp is "none" or "unknown". Frees entities in value
1290 * param subtypes of method types!!! Make sure these are not
1291 * referenced any more. Further make sure there is no pointer type
1292 * that refers to this type. */
1293 void free_type(ir_type *tp);
1295 const tp_op *get_type_tpop(const ir_type *tp);
1296 ident *get_type_tpop_nameid(const ir_type *tp);
1297 const char *get_type_tpop_name(const ir_type *tp);
1298 tp_opcode get_type_tpop_code(const ir_type *tp);
1300 ident *get_type_ident(const ir_type *tp);
1301 void set_type_ident(ir_type *tp, ident* id);
1302 const char *get_type_name(const ir_type *tp);
1304 /** The visibility of a type.
1306 * The visibility of a type indicates, whether entities of this type
1307 * are accessed or allocated in external code.
1309 * An entity of a type is allocated in external code, if the external
1310 * code declares a variable of this type, or dynamically allocates
1311 * an entity of this type. If the external code declares a (compound)
1312 * type, that contains entities of this type, the visibility also
1313 * must be external_allocated.
1315 * The visibility must be higher than that of all entities, if the
1316 * type is a compound. Here it is questionable, what happens with
1317 * static entities. If these are accessed external by direct reference,
1318 * (a static call to a method, that is also in the dispatch table)
1319 * it should not affect the visibility of the type.
1322 * @@@ Do we need a visibility for types?
1323 * I change the layout of types radically when doing type splitting.
1324 * I need to know, which fields of classes are accessed in the RTS,
1325 * e.g., [_length. I may not move [_length to the split part.
1326 * The layout though, is a property of the type.
1328 * One could also think of changing the mode of a type ...
1330 * But, we could also output macros to access the fields, e.g.,
1331 * ACCESS_[_length (X) X->length // conventional
1332 * ACCESS_[_length (X) X->_split_ref->length // with type splitting
1334 * For now I implement this function, that returns the visibility
1335 * based on the visibility of the entities of a compound ...
1337 * This function returns visibility_external_visible if one or more
1338 * entities of a compound type have visibility_external_visible.
1339 * Entities of types are never visibility_external_allocated (right?).
1340 * Else returns visibility_local.
1342 ir_visibility get_type_visibility(const ir_type *tp);
1343 void set_type_visibility(ir_type *tp, ir_visibility v);
1347 /** The state of the type layout. */
1349 layout_undefined, /**< The layout of this type is not defined.
1350 Address computation to access fields is not
1351 possible, fields must be accessed by Sel
1352 nodes. Enumeration constants might be undefined.
1353 This is the default value except for
1354 pointer, primitive and method types. */
1355 layout_fixed /**< The layout is fixed, all component/member entities
1356 have an offset assigned. Size of the type is known.
1357 Arrays can be accessed by explicit address
1358 computation. Enumeration constants must be defined.
1359 Default for pointer, primitive and method types. */
1362 /** Returns a human readable string for the enum entry. */
1363 const char *get_type_state_name(ir_type_state s);
1365 /** Returns the type layout state of a type. */
1366 ir_type_state get_type_state(const ir_type *tp);
1368 /** Sets the type layout state of a type.
1370 * For primitives, pointer and method types the layout is always fixed.
1371 * This call is legal but has no effect.
1373 void set_type_state(ir_type *tp, ir_type_state state);
1375 /** Returns the mode of a type.
1377 * Returns NULL for all non atomic types.
1379 ir_mode *get_type_mode(const ir_type *tp);
1381 /** Sets the mode of a type.
1383 * Only has an effect on primitive, enumeration and pointer types.
1385 void set_type_mode(ir_type *tp, ir_mode* m);
1387 /** Returns the size of a type in bytes. */
1388 unsigned get_type_size_bytes(const ir_type *tp);
1390 /** Sets the size of a type in bytes.
1392 * For primitive, enumeration, pointer and method types the size
1393 * is always fixed. This call is legal but has no effect.
1395 void set_type_size_bytes(ir_type *tp, unsigned size);
1397 /** Returns the alignment of a type in bytes.
1399 * Returns -1 if the alignment is NOT
1400 * a byte size, i.e. not dividable by 8. Calls get_type_alignment_bits(). */
1401 unsigned get_type_alignment_bytes(ir_type *tp);
1403 /** Returns the alignment of a type in bits.
1405 * If the alignment of a type is
1406 * not set, it is calculated here according to the following rules:
1407 * -#.) if a type has a mode, the alignment is the mode size.
1408 * -#.) compound types have the alignment of there biggest member.
1409 * -#.) array types have the alignment of there element type.
1410 * -#.) method types return 0 here.
1411 * -#.) all other types return 1 here (i.e. aligned at byte).
1413 void set_type_alignment_bytes(ir_type *tp, unsigned align);
1415 /** Returns the visited count of a type. */
1416 unsigned long get_type_visited(const ir_type *tp);
1417 /** Sets the visited count of a type to num. */
1418 void set_type_visited(ir_type *tp, unsigned long num);
1419 /** Sets visited field in type to type_visited. */
1420 void mark_type_visited(ir_type *tp);
1421 /** Returns non-zero if the type is already visited */
1422 int type_visited(const ir_type *tp);
1423 /** Returns non-zero if the type is not yet visited */
1424 int type_not_visited(const ir_type *tp);
1426 /** Returns the associated link field of a type. */
1427 void *get_type_link(const ir_type *tp);
1428 /** Sets the associated link field of a type. */
1429 void set_type_link(ir_type *tp, void *l);
1432 * Visited flag to traverse the type information.
1434 * Increase this flag by one before traversing the type information
1435 * using inc_master_type_visited().
1436 * Mark type nodes as visited by mark_type_visited(ir_type).
1437 * Check whether node was already visited by type_visited(ir_type)
1438 * and type_not_visited(ir_type).
1439 * Or use the function to walk all types.
1443 void set_master_type_visited(unsigned long val);
1444 unsigned long get_master_type_visited(void);
1445 void inc_master_type_visited(void);
1448 * Sets the debug information of a type.
1450 * @param tp The type.
1451 * @param db The debug info.
1453 void set_type_dbg_info(ir_type *tp, dbg_info *db);
1456 * Returns the debug information of a type.
1458 * @param tp The type.
1460 dbg_info *get_type_dbg_info(const ir_type *tp);
1463 * Checks whether a pointer points to a type.
1465 * @param thing an arbitrary pointer
1468 * true if the thing is a type, else false
1470 int is_type(const void *thing);
1473 * Checks whether two types are structurally equal.
1475 * @param typ1 the first type
1476 * @param typ2 the second type
1479 * true if the types are equal, else false.
1481 * Types are equal if :
1482 * - they are the same type kind
1483 * - they have the same name
1484 * - they have the same mode (if applicable)
1485 * - they have the same type_state and, ev., the same size
1486 * - they are class types and have:
1487 * - the same members (see same_entity in entity.h)
1488 * - the same supertypes -- the C-pointers are compared --> no recursive call.
1489 * - the same number of subtypes. Subtypes are not compared,
1490 * as this could cause a cyclic test.
1491 * - the same peculiarity
1492 * - they are structure types and have the same members
1493 * - they are method types and have
1494 * - the same parameter types
1495 * - the same result types
1496 * - they are union types and have the same members
1497 * - they are array types and have
1498 * - the same number of dimensions
1499 * - the same dimension bounds
1500 * - the same dimension order
1501 * - the same element type
1502 * - they are enumeration types and have the same enumerator names
1503 * - they are pointer types and have the identical points_to type
1504 * (i.e., the same C-struct to represent the type, type_id is skipped.
1505 * This is to avoid endless recursions; with pointer types cyclic
1506 * type graphs are possible.)
1508 int equal_type(ir_type *typ1, ir_type *typ2);
1511 * Checks whether two types are structural comparable.
1513 * @param st pointer type
1514 * @param lt pointer type
1517 * true if type st is smaller than type lt, i.e. whenever
1518 * lt is expected a st can be used.
1520 * - they are the same type kind
1521 * - mode(st) < mode (lt) (if applicable)
1522 * - they are class types and st is (transitive) subtype of lt,
1523 * - they are structure types and
1524 * - the members of st have exactly one counterpart in lt with the same name,
1525 * - the counterpart has a bigger type.
1526 * - they are method types and have
1527 * - the same number of parameter and result types,
1528 * - the parameter types of st are smaller than those of lt,
1529 * - the result types of st are smaller than those of lt
1530 * - they are union types and have the members of st have exactly one
1531 * @return counterpart in lt and the type is smaller
1532 * - they are array types and have
1533 * - the same number of dimensions
1534 * - all bounds of lt are bound of st
1535 * - the same dimension order
1536 * - the same element type
1538 * - the element type of st is smaller than that of lt
1539 * - the element types have the same size and fixed layout.
1540 * - they are enumeration types and have the same enumerator names
1541 * - they are pointer types and have the points_to type of st is
1542 * @return smaller than the points_to type of lt.
1545 int smaller_type(ir_type *st, ir_type *lt);
1548 * @page class_type Representation of a class type
1550 * If the type opcode is set to type_class the type represents class
1551 * types. A list of fields and methods is associated with a class.
1552 * Further a class can inherit from and bequest to other classes.
1554 * The following attributes are private to this type kind:
1555 * - member: All entities belonging to this class. This are method entities
1556 * which have type_method or fields that can have any of the
1557 * following type kinds: type_class, type_struct, type_union,
1558 * type_array, type_enumeration, type_pointer, type_primitive.
1560 * The following two are dynamic lists that can be grown with an "add_" function,
1563 * - subtypes: A list of direct subclasses.
1565 * - supertypes: A list of direct superclasses.
1567 * - peculiarity: The peculiarity of this class. If the class is of peculiarity
1568 * "description" it only is a description of requirements to a class,
1569 * as, e.g., a Java interface. The class will never be allocated.
1570 * Peculiarity inherited is only possible for entities. An entity
1571 * is of peculiarity inherited if the compiler generated the entity
1572 * to explicitly resolve inheritance. An inherited method entity has
1574 * Values: description, existent, inherited. Default: existent.
1576 * - type_info: An entity representing the type information of this class.
1577 * This entity can be of arbitrari type, Firm did not use it yet.
1578 * It allows to express the coupling of a type with an entity
1579 * representing this type. This information is useful for lowering
1580 * of InstOf and TypeChk nodes. Default: NULL
1582 * - vtable_size: The size of this class virtual function table.
1585 * - final: A final class is always a leaf in the class hierarchy. Final
1586 * classes cannot be super classes of other ones. As this information
1587 * can only be computed in whole world compilations, we allow to
1588 * set this flag. It is used in optimizations if get_opt_closed_world()
1589 * is false. Default: false
1591 * - interface: The class represents an interface. This flag can be set to distinguish
1592 * between interfaces, abstract classes and other classes that all may
1593 * have the peculiarity peculiarity_description. Depending on this flag
1594 * the lowering might do different actions. Default: false
1596 * - abstract : The class represents an abstract class. This flag can be set to distinguish
1597 * between interfaces, abstract classes and other classes that all may
1598 * have the peculiarity peculiarity_description. Depending on this flag
1599 * the lowering might do different actions. Default: false
1602 /** Creates a new class type. */
1603 ir_type *new_type_class(ident *name);
1605 /** Creates a new class type with debug information. */
1606 ir_type *new_d_type_class(ident *name, dbg_info *db);
1608 /* --- manipulate private fields of class type --- */
1610 /** Adds the entity as member of the class. */
1611 void add_class_member(ir_type *clss, ir_entity *member);
1613 /** Returns the number of members of this class. */
1614 int get_class_n_members(const ir_type *clss);
1616 /** Returns the member at position pos, 0 <= pos < n_member */
1617 ir_entity *get_class_member(const ir_type *clss, int pos);
1619 /** Returns index of mem in clss, -1 if not contained. */
1620 int get_class_member_index(const ir_type *clss, ir_entity *mem);
1622 /** Finds the member with name 'name'. If several members with the same
1623 * name returns one of them. Returns NULL if no member found. */
1624 ir_entity *get_class_member_by_name(ir_type *clss, ident *name);
1626 /** Overwrites the member at position pos, 0 <= pos < n_member with
1627 * the passed entity. */
1628 void set_class_member(ir_type *clss, ir_entity *member, int pos);
1630 /** Replaces complete member list in class type by the list passed.
1632 * Copies the list passed. This function is necessary to reduce the number of members.
1633 * members is an array of entities, num the size of this array. Sets all
1634 * owners of the members passed to clss. */
1635 void set_class_members(ir_type *clss, ir_entity *members[], int arity);
1637 /** Finds member in the list of members and removes it.
1639 * Shrinks the member list, so iterate from the end!!!
1640 * Does not deallocate the entity. */
1641 void remove_class_member(ir_type *clss, ir_entity *member);
1644 /** Adds subtype as subtype to clss.
1646 * Checks whether clss is a supertype of subtype. If not
1647 * adds also clss as supertype to subtype. */
1648 void add_class_subtype(ir_type *clss, ir_type *subtype);
1650 /** Returns the number of subtypes */
1651 int get_class_n_subtypes(const ir_type *clss);
1653 /** Gets the subtype at position pos, 0 <= pos < n_subtype. */
1654 ir_type *get_class_subtype(ir_type *clss, int pos);
1656 /** Returns the index to access subclass as subtype of class.
1658 * If subclass is no direct subtype of class returns -1.
1660 int get_class_subtype_index(ir_type *clss, const ir_type *subclass);
1662 /** Sets the subtype at position pos, 0 <= pos < n_subtype.
1664 * Does not set the corresponding supertype relation for subtype: this might
1665 * be a different position! */
1666 void set_class_subtype(ir_type *clss, ir_type *subtype, int pos);
1668 /** Finds subtype in the list of subtypes and removes it */
1669 void remove_class_subtype(ir_type *clss, ir_type *subtype);
1671 /* Convenience macros */
1672 #define add_class_derived_type(clss, drvtype) add_class_subtype(clss, drvtype)
1673 #define get_class_n_derived_types(clss) get_class_n_subtypes(clss)
1674 #define get_class_derived_type(clss, pos) get_class_subtype(clss, pos)
1675 #define get_class_derived_type_index(clss, drvtype) get_class_subtype_index(clss, drvtype)
1676 #define set_class_derived_type(clss, drvtype, pos) set_class_subtype(clss, drvtype, pos)
1677 #define remove_class_derived_type(clss, drvtype) remove_class_subtype(clss, drvtype)
1679 /** Adds supertype as supertype to class.
1681 * Checks whether clss is a subtype of supertype. If not
1682 * adds also clss as subtype to supertype. */
1683 void add_class_supertype(ir_type *clss, ir_type *supertype);
1685 /** Returns the number of supertypes */
1686 int get_class_n_supertypes(const ir_type *clss);
1688 /** Returns the index to access superclass as supertype of class.
1690 * If superclass is no direct supertype of class returns -1.
1692 int get_class_supertype_index(ir_type *clss, ir_type *super_clss);
1694 /** Gets the supertype at position pos, 0 <= pos < n_supertype. */
1695 ir_type *get_class_supertype(ir_type *clss, int pos);
1697 /** Sets the supertype at position pos, 0 <= pos < n_supertype.
1699 * Does not set the corresponding subtype relation for supertype: this might
1700 * be at a different position! */
1701 void set_class_supertype(ir_type *clss, ir_type *supertype, int pos);
1703 /** Finds supertype in the list of supertypes and removes it */
1704 void remove_class_supertype(ir_type *clss, ir_type *supertype);
1706 /** Convenience macro */
1707 #define add_class_base_type(clss, basetype) add_class_supertype(clss, basetype)
1708 #define get_class_n_base_types(clss) get_class_n_supertypes(clss)
1709 #define get_class_base_type_index(clss, base_clss) get_class_supertype_index(clss, base_clss)
1710 #define get_class_base_type(clss, pos) get_class_supertype(clss, pos)
1711 #define set_class_base_type(clss, basetype, pos) set_class_supertype(clss, basetype, pos)
1712 #define remove_class_base_type(clss, basetype) remove_class_supertype(clss, basetype)
1714 /** Convenience macro */
1715 #define add_class_base_type(clss, basetype) add_class_supertype(clss, basetype)
1716 #define get_class_n_base_types(clss) get_class_n_supertypes(clss)
1717 #define get_class_base_type_index(clss, base_clss) get_class_supertype_index(clss, base_clss)
1718 #define get_class_base_type(clss, pos) get_class_supertype(clss, pos)
1719 #define set_class_base_type(clss, basetype, pos) set_class_supertype(clss, basetype, pos)
1720 #define remove_class_base_type(clss, basetype) remove_class_supertype(clss, basetype)
1722 /** Returns a human readable string for a peculiarity. */
1723 const char *get_peculiarity_name(ir_peculiarity p);
1725 /** Returns the peculiarity of the class. */
1726 ir_peculiarity get_class_peculiarity(const ir_type *clss);
1727 /** Sets the peculiarity of the class. */
1728 void set_class_peculiarity(ir_type *clss, ir_peculiarity pec);
1730 /** Returns the type info entity of a class. */
1731 ir_entity *get_class_type_info(const ir_type *clss);
1733 /** Set a type info entity for the class. */
1734 void set_class_type_info(ir_type *clss, ir_entity *ent);
1736 /** Returns the size of the virtual function table. */
1737 unsigned get_class_vtable_size(const ir_type *clss);
1739 /** Sets a new size of the virtual function table. */
1740 void set_class_vtable_size(ir_type *clss, unsigned size);
1742 /** Returns non-zero if a class is final. */
1743 int is_class_final(const ir_type *clss);
1745 /** Sets the class final flag. */
1746 void set_class_final(ir_type *clss, int flag);
1748 /** Return non-zero if a class is an interface */
1749 int is_class_interface(const ir_type *clss);
1751 /** Sets the class interface flag. */
1752 void set_class_interface(ir_type *clss, int flag);
1754 /** Return non-zero if a class is an abstract class. */
1755 int is_class_abstract(const ir_type *clss);
1757 /** Sets the class abstract flag. */
1758 void set_class_abstract(ir_type *clss, int flag);
1760 /** Set and get a class' dfn --
1761 @todo This is an undocumented field, subject to change! */
1762 void set_class_dfn(ir_type *clss, int dfn);
1763 int get_class_dfn(const ir_type *clss);
1765 /** Returns true if a type is a class type. */
1766 int is_Class_type(const ir_type *clss);
1769 * @page struct_type Representation of a struct type
1771 * A struct type represents aggregate types that consist of a list
1774 * The following attributes are private to this type kind:
1775 * - member: All entities belonging to this class. This are the fields
1776 * that can have any of the following types: type_class,
1777 * type_struct, type_union, type_array, type_enumeration,
1778 * type_pointer, type_primitive.
1779 * This is a dynamic list that can be grown with an "add_" function,
1781 * This is a dynamic list that can be grown with an "add_" function,
1784 /** Creates a new type struct */
1785 ir_type *new_type_struct(ident *name);
1786 /** Creates a new type struct with debug information. */
1787 ir_type *new_d_type_struct(ident *name, dbg_info* db);
1789 /* --- manipulate private fields of struct --- */
1791 /** Adds the entity as member of the struct. */
1792 void add_struct_member(ir_type *strct, ir_entity *member);
1794 /** Returns the number of members of this struct. */
1795 int get_struct_n_members(const ir_type *strct);
1797 /** Returns the member at position pos, 0 <= pos < n_member */
1798 ir_entity *get_struct_member(const ir_type *strct, int pos);
1800 /** Returns index of member in strct, -1 if not contained. */
1801 int get_struct_member_index(const ir_type *strct, ir_entity *member);
1803 /** Overwrites the member at position pos, 0 <= pos < n_member with
1804 the passed entity. */
1805 void set_struct_member(ir_type *strct, int pos, ir_entity *member);
1807 /** Finds member in the list of members and removes it. */
1808 void remove_struct_member(ir_type *strct, ir_entity *member);
1810 /** Returns true if a type is a struct type. */
1811 int is_Struct_type(const ir_type *strct);
1814 * @page method_type Representation of a method type
1816 * A method type represents a method, function or procedure type.
1817 * It contains a list of the parameter and result types, as these
1818 * are part of the type description. These lists should not
1819 * be changed by a optimization, as a change creates a new method
1820 * type. Therefore optimizations should allocated new method types.
1821 * The set_ routines are only for construction by a frontend.
1823 * - n_params: Number of parameters to the procedure.
1824 * A procedure in FIRM has only call by value parameters.
1826 * - param_type: A list with the types of parameters. This list is ordered.
1827 * The nth type in this list corresponds to the nth element
1828 * in the parameter tuple that is a result of the start node.
1829 * (See ircons.h for more information.)
1831 * - value_param_ents
1832 * A list of entities (whose owner is a struct private to the
1833 * method type) that represent parameters passed by value.
1835 * - n_res: The number of results of the method. In general, procedures
1836 * have zero results, functions one.
1838 * - res_type: A list with the types of parameters. This list is ordered.
1839 * The nth type in this list corresponds to the nth input to
1840 * Return nodes. (See ircons.h for more information.)
1843 * A list of entities (whose owner is a struct private to the
1844 * method type) that represent results passed by value.
1847 /* These macros define the suffixes for the types and entities used
1848 to represent value parameters / results. */
1849 #define VALUE_PARAMS_SUFFIX "val_param"
1850 #define VALUE_RESS_SUFFIX "val_res"
1852 /** Create a new method type.
1854 * @param name the name (ident) of this type
1855 * @param n_param the number of parameters
1856 * @param n_res the number of results
1858 * The arrays for the parameter and result types are not initialized by
1861 ir_type *new_type_method(ident *name, int n_param, int n_res);
1863 /** Create a new method type with debug information.
1865 * @param name the name (ident) of this type
1866 * @param n_param the number of parameters
1867 * @param n_res the number of results
1868 * @param db user defined debug information
1870 * The arrays for the parameter and result types are not initialized by
1873 ir_type *new_d_type_method(ident *name, int n_param, int n_res, dbg_info *db);
1875 /** Clone an existing method type.
1877 * @param tp the method type to clone.
1878 * @param prefix if non-null, will be the prefix for the name of
1881 * @return the cloned method type.
1883 ir_type *clone_type_method(ir_type *tp, ident *prefix);
1885 /* -- manipulate private fields of method. -- */
1887 /** Returns the number of parameters of this method. */
1888 int get_method_n_params(const ir_type *method);
1890 /** Returns the type of the parameter at position pos of a method. */
1891 ir_type *get_method_param_type(ir_type *method, int pos);
1892 /** Sets the type of the parameter at position pos of a method.
1893 Also changes the type in the pass-by-value representation by just
1894 changing the type of the corresponding entity if the representation is constructed. */
1895 void set_method_param_type(ir_type *method, int pos, ir_type *tp);
1896 /** Returns an entity that represents the copied value argument. Only necessary
1897 for compounds passed by value. This information is constructed only on demand. */
1898 ir_entity *get_method_value_param_ent(ir_type *method, int pos);
1900 * Returns a type that represents the copied value arguments if one
1901 * was allocated, else NULL.
1903 ir_type *get_method_value_param_type(const ir_type *method);
1904 /** Returns an ident representing the parameters name. Returns NULL if not set.
1905 For debug support only. */
1906 ident *get_method_param_ident(ir_type *method, int pos);
1907 /** Returns a string representing the parameters name. Returns NULL if not set.
1908 For debug support only. */
1909 const char *get_method_param_name(ir_type *method, int pos);
1910 /** Sets an ident representing the parameters name. For debug support only. */
1911 void set_method_param_ident(ir_type *method, int pos, ident *id);
1913 /** Returns the number of results of a method type. */
1914 int get_method_n_ress(const ir_type *method);
1915 /** Returns the return type of a method type at position pos. */
1916 ir_type *get_method_res_type(ir_type *method, int pos);
1917 /** Sets the type of the result at position pos of a method.
1918 Also changes the type in the pass-by-value representation by just
1919 changing the type of the corresponding entity if the representation is constructed. */
1920 void set_method_res_type(ir_type *method, int pos, ir_type *tp);
1921 /** Returns an entity that represents the copied value result. Only necessary
1922 for compounds passed by value. This information is constructed only on demand. */
1923 ir_entity *get_method_value_res_ent(ir_type *method, int pos);
1926 * Returns a type that represents the copied value results.
1928 ir_type *get_method_value_res_type(const ir_type *method);
1931 * This enum flags the variadicity of methods (methods with a
1932 * variable amount of arguments (e.g. C's printf). Default is
1935 typedef enum variadicity {
1936 variadicity_non_variadic, /**< non variadic */
1937 variadicity_variadic /**< variadic */
1940 /** Returns the null-terminated name of this variadicity. */
1941 const char *get_variadicity_name(variadicity vari);
1943 /** Returns the variadicity of a method. */
1944 variadicity get_method_variadicity(const ir_type *method);
1946 /** Sets the variadicity of a method. */
1947 void set_method_variadicity(ir_type *method, variadicity vari);
1950 * Returns the first variadic parameter index of a type.
1951 * If this index was NOT set, the index of the last parameter
1952 * of the method type plus one is returned for variadic functions.
1953 * Non-variadic function types always return -1 here.
1955 int get_method_first_variadic_param_index(const ir_type *method);
1958 * Sets the first variadic parameter index. This allows to specify
1959 * a complete call type (containing the type of all parameters)
1960 * but still have the knowledge, which parameter must be passed as
1963 void set_method_first_variadic_param_index(ir_type *method, int index);
1965 /** Returns the mask of the additional graph properties. */
1966 unsigned get_method_additional_properties(const ir_type *method);
1968 /** Sets the mask of the additional graph properties. */
1969 void set_method_additional_properties(ir_type *method, unsigned property_mask);
1971 /** Sets one additional graph property. */
1972 void set_method_additional_property(ir_type *method, mtp_additional_property flag);
1975 * Calling conventions: lower 24 bits are the number of register parameters,
1976 * upper 8 encode the calling conventions.
1979 cc_reg_param = 0x01000000, /**< Transmit parameters in registers, else the stack is used.
1980 This flag may be set as default on some architectures. */
1981 cc_last_on_top = 0x02000000, /**< The last non-register parameter is transmitted on top of
1982 the stack. This is equivalent to the pascal
1983 calling convention. If this flag is not set, the first
1984 non-register parameter is used (stdcall or cdecl
1985 calling convention) */
1986 cc_callee_clear_stk = 0x04000000, /**< The callee clears the stack. This forbids variadic
1987 function calls (stdcall). */
1988 cc_this_call = 0x08000000, /**< The first parameter is a this pointer and is transmitted
1989 in a special way. */
1990 cc_compound_ret = 0x10000000, /**< the method returns a compound
1993 cc_bits = (0xFF << 24) /**< the calling convention bits */
1994 } calling_convention;
1996 /* some often used cases: made as defines because firmjni cannot handle two
1997 equal enum values. */
1999 /** cdecl calling convention */
2000 #define cc_cdecl_set (0)
2001 /** stdcall calling convention */
2002 #define cc_stdcall_set cc_callee_clear_stk
2003 /** fastcall calling convention */
2004 #define cc_fastcall_set (cc_reg_param|cc_callee_clear_stk)
2006 /** Returns the default calling convention for method types. */
2007 unsigned get_default_cc_mask(void);
2010 * check for the CDECL calling convention
2012 #define IS_CDECL(cc_mask) (((cc_mask) & cc_bits) == cc_cdecl_set)
2015 * check for the STDCALL calling convention
2017 #define IS_STDCALL(cc_mask) (((cc_mask) & cc_bits) == cc_stdcall_set)
2020 * check for the FASTCALL calling convention
2022 #define IS_FASTCALL(cc_mask) (((cc_mask) & cc_bits) == cc_fastcall_set)
2025 * Sets the CDECL convention bits.
2027 #define SET_CDECL(cc_mask) (((cc_mask) & ~cc_bits) | cc_cdecl_set)
2030 * Set. the STDCALL convention bits.
2032 #define SET_STDCALL(cc_mask) (((cc_mask) & ~cc_bits) | cc_stdcall_set)
2035 * Sets the FASTCALL convention bits.
2037 #define SET_FASTCALL(cc_mask) (((cc_mask) & ~cc_bits) | cc_fastcall_set)
2039 /** Returns the calling convention of an entities graph. */
2040 unsigned get_method_calling_convention(const ir_type *method);
2042 /** Sets the calling convention of an entities graph. */
2043 void set_method_calling_convention(ir_type *method, unsigned cc_mask);
2045 /** Returns the number of registers parameters, 0 means default. */
2046 unsigned get_method_n_regparams(ir_type *method);
2048 /** Sets the number of registers parameters, 0 means default. */
2049 void set_method_n_regparams(ir_type *method, unsigned n_regs);
2051 /** Returns true if a type is a method type. */
2052 int is_Method_type(const ir_type *method);
2055 * @page union_type Representation of a union (variant) type.
2057 * The union type represents union types. Note that this representation
2058 * resembles the C union type. For tagged variant types like in Pascal or Modula
2059 * a combination of a struct and a union type must be used.
2061 * - n_types: Number of unioned types.
2062 * - members: Entities for unioned types. Fixed length array.
2063 * This is a dynamic list that can be grown with an "add_" function,
2066 /** Creates a new type union. */
2067 ir_type *new_type_union(ident *name);
2069 /** Creates a new type union with debug information. */
2070 ir_type *new_d_type_union(ident *name, dbg_info* db);
2072 /* --- manipulate private fields of struct --- */
2074 /** Returns the number of unioned types of this union */
2075 int get_union_n_members(const ir_type *uni);
2077 /** Adds a new entity to a union type */
2078 void add_union_member(ir_type *uni, ir_entity *member);
2080 /** Returns the entity at position pos of a union */
2081 ir_entity *get_union_member(const ir_type *uni, int pos);
2083 /** Returns index of member in uni, -1 if not contained. */
2084 int get_union_member_index(const ir_type *uni, ir_entity *member);
2086 /** Overwrites a entity at position pos in a union type. */
2087 void set_union_member(ir_type *uni, int pos, ir_entity *member);
2089 /** Finds member in the list of members and removes it. */
2090 void remove_union_member(ir_type *uni, ir_entity *member);
2092 /** Returns true if a type is a union type. */
2093 int is_Union_type(const ir_type *uni);
2096 * @page array_type Representation of an array type
2098 * The array type represents rectangular multi dimensional arrays.
2099 * The constants representing the bounds must be allocated to
2100 * get_const_code_irg() by setting current_ir_graph accordingly.
2102 * - n_dimensions: Number of array dimensions.
2103 * - *lower_bound: Lower bounds of dimensions. Usually all 0.
2104 * - *upper_bound: Upper bounds or dimensions.
2105 * - *element_type: The type of the array elements.
2106 * - *element_ent: An entity for the array elements to be used for
2107 * element selection with Sel.
2109 * Do we need several entities? One might want
2110 * to select a dimension and not a single element in case of multi
2111 * dimensional arrays.
2114 /** Create a new type array.
2116 * Sets n_dimension to dimension and all dimension entries to NULL.
2117 * Initializes order to the order of the dimensions.
2118 * The entity for array elements is built automatically.
2119 * Set dimension sizes after call to constructor with set_* routines.
2121 ir_type *new_type_array(ident *name, int n_dims, ir_type *element_type);
2123 /** Create a new type array with debug information.
2125 * Sets n_dimension to dimension and all dimension entries to NULL.
2126 * Initializes order to the order of the dimensions.
2127 * The entity for array elements is built automatically.
2128 * Set dimension sizes after call to constructor with set_* routines.
2129 * A legal array type must have at least one dimension set.
2131 ir_type *new_d_type_array(ident *name, int n_dims, ir_type *element_type, dbg_info* db);
2133 /* --- manipulate private fields of array type --- */
2135 /** Returns the number of array dimensions of this type. */
2136 int get_array_n_dimensions(const ir_type *array);
2139 * Allocates Const nodes of mode_Is for one array dimension.
2140 * Upper bound in Firm is the element next to the last, i.e. [lower,upper[
2142 void set_array_bounds_int(ir_type *array, int dimension, int lower_bound,
2145 * Sets the bounds for one array dimension.
2146 * Upper bound in Firm is the element next to the last, i.e. [lower,upper[
2148 void set_array_bounds(ir_type *array, int dimension, ir_node *lower_bound,
2149 ir_node *upper_bound);
2150 /** Sets the lower bound for one array dimension, i.e. [lower,upper[ */
2151 void set_array_lower_bound(ir_type *array, int dimension, ir_node *lower_bound);
2153 /** Allocates Const nodes of mode_Is for the lower bound of an array
2154 dimension, i.e. [lower,upper[ */
2155 void set_array_lower_bound_int(ir_type *array, int dimension, int lower_bound);
2157 /** Sets the upper bound for one array dimension, i.e. [lower,upper[ */
2158 void set_array_upper_bound(ir_type *array, int dimension, ir_node *upper_bound);
2160 /** Allocates Const nodes of mode_Is for the upper bound of an array
2161 dimension, i.e. [lower,upper[. */
2162 void set_array_upper_bound_int(ir_type *array, int dimension, int upper_bound);
2164 /** Returns true if lower bound != Unknown. */
2165 int has_array_lower_bound(const ir_type *array, int dimension);
2166 /** Returns the lower bound of an array. */
2167 ir_node *get_array_lower_bound(const ir_type *array, int dimension);
2168 /** Works only if bound is Const node with tarval that can be converted to long. */
2169 long get_array_lower_bound_int(const ir_type *array, int dimension);
2170 /** returns true if lower bound != Unknown */
2171 int has_array_upper_bound(const ir_type *array, int dimension);
2172 /** Returns the upper bound of an array. */
2173 ir_node *get_array_upper_bound(const ir_type *array, int dimension);
2174 /** Works only if bound is Const node with tarval that can be converted to long. */
2175 long get_array_upper_bound_int(const ir_type *array, int dimension);
2177 /** Sets an array dimension to a specific order. */
2178 void set_array_order(ir_type *array, int dimension, int order);
2180 /** Returns the order of an array dimension. */
2181 int get_array_order(const ir_type *array, int dimension);
2183 /** Find the array dimension that is placed at order order. */
2184 int find_array_dimension(const ir_type *array, int order);
2186 /** Sets the array element type. */
2187 void set_array_element_type(ir_type *array, ir_type* tp);
2189 /** Gets the array element type. */
2190 ir_type *get_array_element_type(ir_type *array);
2192 /** Sets the array element entity. */
2193 void set_array_element_entity(ir_type *array, ir_entity *ent);
2195 /** Get the array element entity. */
2196 ir_entity *get_array_element_entity(const ir_type *array);
2198 /** Returns true if a type is an array type. */
2199 int is_Array_type(const ir_type *array);
2202 * @page enumeration_type Representation of an enumeration type
2204 * Enumeration types need not necessarily be represented explicitly
2205 * by Firm types, as the frontend can lower them to integer constants as
2206 * well. For debugging purposes or similar tasks this information is useful.
2207 * The type state layout_fixed is set, if all enumeration constant have
2208 * there tarvals assigned. Until then
2210 * - *const: The target values representing the constants used to
2211 * represent individual enumerations.
2214 /** Create a new type enumeration -- set the enumerators independently. */
2215 ir_type *new_type_enumeration(ident *name, int n_enums);
2217 /** Create a new type enumeration with debug information -- set the enumerators independently. */
2218 ir_type *new_d_type_enumeration(ident *name, int n_enums, dbg_info *db);
2220 /* --- manipulate fields of enumeration type. --- */
2222 /** Set an enumeration constant to a enumeration type at a given position. */
2223 void set_enumeration_const(ir_type *enumeration, int pos, ident *nameid, tarval *con);
2225 /** Returns the number of enumeration values of this enumeration */
2226 int get_enumeration_n_enums(const ir_type *enumeration);
2228 /** Returns the enumeration constant at a given position. */
2229 ir_enum_const *get_enumeration_const(const ir_type *enumeration, int pos);
2231 /** Returns the enumeration type owner of an enumeration constant. */
2232 ir_type *get_enumeration_owner(const ir_enum_const *enum_cnst);
2234 /** Sets the enumeration constant value. */
2235 void set_enumeration_value(ir_enum_const *enum_cnst, tarval *con);
2237 /** Returns the enumeration constant value. */
2238 tarval *get_enumeration_value(const ir_enum_const *enum_cnst);
2240 /** Assign an ident to an enumeration constant. */
2241 void set_enumeration_nameid(ir_enum_const *enum_cnst, ident *id);
2243 /** Returns the assigned ident of an enumeration constant. */
2244 ident *get_enumeration_nameid(const ir_enum_const *enum_cnst);
2246 /** Returns the assigned name of an enumeration constant. */
2247 const char *get_enumeration_name(const ir_enum_const *enum_cnst);
2249 /** Returns true if a type is a enumeration type. */
2250 int is_Enumeration_type(const ir_type *enumeration);
2253 * @page pointer_type Representation of a pointer type
2255 * The mode of the pointer type must be a reference mode.
2258 * - points_to: The type of the entity this pointer points to.
2261 /** Creates a new type pointer. */
2262 ir_type *new_type_pointer(ident *name, ir_type *points_to, ir_mode *ptr_mode);
2264 /** Creates a new type pointer with debug information. */
2265 ir_type *new_d_type_pointer(ident *name, ir_type *points_to, ir_mode *ptr_mode, dbg_info* db);
2267 /* --- manipulate fields of type_pointer --- */
2269 /** Sets the type to which a pointer points to. */
2270 void set_pointer_points_to_type(ir_type *pointer, ir_type *tp);
2272 /** Returns the type to which a pointer points to. */
2273 ir_type *get_pointer_points_to_type(ir_type *pointer);
2275 /** Returns true if a type is a pointer type. */
2276 int is_Pointer_type(const ir_type *pointer);
2278 /** Returns the first pointer type that has as points_to tp.
2279 * Not efficient: O(#types).
2280 * If not found returns firm_unknown_type. */
2281 ir_type *find_pointer_type_to_type(ir_type *tp);
2284 * @page primitive_type Representation of a primitive type
2286 * Primitive types are types that represent atomic data values that
2287 * map directly to modes. They don't have private attributes. The
2288 * important information they carry is held in the common mode field.
2290 /** Creates a new primitive type. */
2291 ir_type *new_type_primitive(ident *name, ir_mode *mode);
2293 /** Creates a new primitive type with debug information. */
2294 ir_type *new_d_type_primitive(ident *name, ir_mode *mode, dbg_info* db);
2296 /** Returns true if a type is a primitive type. */
2297 int is_Primitive_type(const ir_type *primitive);
2299 /** Return the base type of a primitive (bitfield) type or NULL if none. */
2300 ir_type *get_primitive_base_type(ir_type *tp);
2302 /** Sets the base type of a primitive (bitfield) type. */
2303 void set_primitive_base_type(ir_type *tp, ir_type *base_tp);
2306 * @page none_type The None type
2308 * This type is an auxiliary type dedicated to support type analyses.
2310 * The none type represents that there is no type. The type can be used to
2311 * initialize fields of type* that actually can not contain a type or that
2312 * are initialized for an analysis. There exists exactly one type none.
2313 * This type is not on the type list in ir_prog. It is
2314 * allocated when initializing the type module.
2316 * The following values are set:
2318 * - name: "type_none"
2319 * - state: layout_fixed
2322 /** A variable that contains the only none type. */
2323 extern ir_type *firm_none_type;
2325 /** Returns the none type. */
2326 ir_type *get_none_type(void);
2329 * @page unknown_type The Unknown type
2331 * This type is an auxiliary type dedicated to support type analyses.
2333 * The unknown type represents that there could be a type, but it is not
2334 * known. This type can be used to initialize fields before an analysis (not known
2335 * yet) or to represent the top of a lattice (could not be determined). There exists
2336 * exactly one type unknown. This type is not on the type list in ir_prog. It is
2337 * allocated when initializing the type module.
2339 * The following values are set:
2341 * - name: "type_unknown"
2342 * - state: layout_fixed
2345 /** A variable that contains the only unknown type. */
2346 extern ir_type *firm_unknown_type;
2348 /** Returns the unknown type. */
2349 ir_type *get_unknown_type(void);
2353 * Checks whether a type is atomic.
2354 * @param tp any type
2355 * @return true if type is primitive, pointer or enumeration
2357 int is_atomic_type(const ir_type *tp);
2359 /* --- Support for compound types --- */
2362 * Gets the number of elements in a Firm compound type.
2364 * This is just a comfortability function, because structs and
2365 * classes can often be treated be the same code, but they have
2366 * different access functions to their members.
2368 * @param tp The type (must be struct, union or class).
2370 * @return Number of members in the compound type.
2372 int get_compound_n_members(const ir_type *tp);
2375 * Gets the member of a Firm compound type at position pos.
2377 * @param tp The type (must be struct, union or class).
2378 * @param pos The number of the member.
2380 * @return The member entity at position pos.
2382 * @see get_compound_n_members() for justification of existence.
2384 ir_entity *get_compound_member(const ir_type *tp, int pos);
2386 /** Returns index of member in tp, -1 if not contained. */
2387 int get_compound_member_index(const ir_type *tp, ir_entity *member);
2390 * Checks whether a type is a compound type.
2392 * @param tp - any type
2394 * @return true if the type is class, structure, union or array type.
2396 int is_compound_type(const ir_type *tp);
2399 * Checks, whether a type is a frame type.
2401 int is_frame_type(const ir_type *tp);
2404 * Checks, whether a type is a value parameter type.
2406 int is_value_param_type(const ir_type *tp);
2409 * Checks, whether a type is a lowered type.
2411 int is_lowered_type(const ir_type *tp);
2414 * Makes a new frame type. Frame types are class types,
2415 * so all class access functions work.
2416 * Frame types are not in the global list of types.
2418 ir_type *new_type_frame(ident *name);
2421 * Sets a lowered type for a type. This sets both associations
2422 * and marks lowered_type as a "lowered" one.
2424 void set_lowered_type(ir_type *tp, ir_type *lowered_type);
2427 * Gets the lowered/unlowered type of a type or NULL if this type
2428 * has no lowered/unlowered one.
2430 ir_type *get_associated_type(const ir_type *tp);
2433 * Allocate an area of size bytes aligned at alignment
2434 * at the start or the end of a frame type.
2435 * The frame type must already have a fixed layout.
2437 * @param frame_type a frame type
2438 * @param size the size of the entity
2439 * @param alignment the alignment of the entity
2440 * @param at_start if true, put the area at the frame type's start, else at end
2442 * @return the entity representing the area
2444 ir_entity *frame_alloc_area(ir_type *frame_type, int size, unsigned alignment, int at_start);
2446 /*-----------------------------------------------------------------*/
2448 /*-----------------------------------------------------------------*/
2451 * Outputs a unique number for this type if libfirm is compiled for
2452 * debugging, (configure with --enable-debug) else returns the address
2453 * of the type cast to long.
2455 long get_type_nr(const ir_type *tp);
2457 /* ------------------------------------------------------------------------ */
2459 /** Type for a function that compares two types.
2461 * @param tp1 The first type to compare.
2462 * @param tp2 The second type to compare.
2464 typedef int (compare_types_func_t)(const void *tp1, const void *tp2);
2466 /** Compares two types by their name.
2468 * Compares the opcode and the name of the types. If these are
2469 * equal returns 0, else non-zero.
2471 int compare_names(const void *tp1, const void *tp2);
2473 /** Compares two types strict.
2475 * returns 0 if tp1 == tp2, else non-zero
2477 int compare_strict(const void *tp1, const void *tp2);
2479 /* ------------------------------------------------------------------------ */
2481 /** Type for a function that computes a hash value for a type.
2483 * @param tp The type to compute a hash for.
2485 typedef int (hash_types_func_t)(ir_type *tp);
2487 /** Computes a hash value by the type name.
2489 * Uses the name of the type and the type opcode to compute the hash.
2491 int firm_hash_name(ir_type *tp);
2493 /* ------------------------------------------------------------------------ */
2495 /** Finalize type construction.
2497 * Indicate that a type is so far completed that it can be
2498 * distinguished from other types. Mature_type hashes the type into a
2499 * table. It uses the function in compare_types_func to compare the
2502 * If it finds a type identical to tp it returns this type. It turns
2503 * tp into the Id type. All places formerly pointing to tp will now
2504 * point to the found type. All entities of tp now refer to the found
2505 * type as their owner, but they are not a member of this type. This
2506 * is invalid firm -- the entities must be replaced by entities of the
2507 * found type. The Id type will be removed from the representation
2508 * automatically, but within an unknown time span. It occupies memory
2511 * @param tp The type to mature.
2513 ir_type *mature_type(ir_type *tp);
2515 /** Finalize type construction.
2517 * Indicate that a type is so far completed that it can be
2518 * distinguished from other types. mature_type() hashes the type into a
2519 * table. It uses the function in compare_types_func to compare the
2522 * If it finds a type identical to tp it returns this type. It frees
2523 * type tp and all its entities.
2525 * @param tp The type to mature.
2527 ir_type *mature_type_free(ir_type *tp);
2529 /** Finalize type construction.
2531 * Indicate that a type is so far completed that it can be
2532 * distinguished from other types. Mature_type hashes the type into a
2533 * table. It uses the function in compare_types_func to compare the
2536 * If it find a type identical to tp it returns this type. It frees
2537 * the entities and turns the type into an Id type. All places
2538 * formerly pointing to tp will now point to the found type. The Id
2539 * type will be removed from the representation automatically, but
2540 * within an unknown time span. It occupies memory for this time.
2542 * @param tp The type to mature.
2544 ir_type *mature_type_free_entities(ir_type *tp);
2547 * The interface type for the type identify module;
2549 typedef struct _type_identify_if_t {
2550 compare_types_func_t *cmp; /**< The function that should be used to compare two types.
2551 If NULL, compare_strict() will be used. */
2552 hash_types_func_t *hash; /**< The function that should be used to calculate a hash
2553 value of a type. If NULL, hash_name() will be used. */
2554 } type_identify_if_t;
2557 * Initialise the type identifier module.
2559 * @param ti_if The interface functions for this module.
2561 * If the parameter ti_if is NULL, the default functions compare_strict() and
2562 * firm_hash_name() will be used.
2564 void init_type_identify(type_identify_if_t *ti_if);
2566 /** A data type to treat types and entities as the same. */
2568 ir_type *typ; /**< points to a type */
2569 ir_entity *ent; /**< points to an entity */
2572 /** Type of argument functions for type walkers.
2574 * @param tore points to the visited type or entity
2575 * @param env free environment pointer
2577 typedef void type_walk_func(type_or_ent *tore, void *env);
2579 /** The class walk function
2581 * @param clss points to the visited class
2582 * @param env free environment pointer
2584 typedef void class_walk_func(ir_type *clss, void *env);
2586 /** Touches every type and entity in unspecified order. If new
2587 * types/entities are created during the traversal these will
2589 * Does not touch frame types or types for value params ... */
2590 void type_walk(type_walk_func *pre, type_walk_func *post, void *env);
2592 /** Walks over all type information reachable from an ir graph.
2594 * Walks over all type information reachable from irg, i.e., starts a
2595 * type walk at the irgs entity, the irgs frame type and all types and
2596 * entities that are attributes to firm nodes. */
2597 void type_walk_irg(ir_graph *irg, type_walk_func *pre, type_walk_func *post,
2601 Touches every class in specified order:
2602 - first the super class
2603 - second the class itself
2604 - third the sub classes. If new classes are created
2605 during the traversal these will be visited, too.
2607 @todo should be named class-walk
2609 @deprecated will be removed?
2611 void type_walk_super2sub(type_walk_func *pre, type_walk_func *post, void *env);
2613 /** Walker for class types in inheritance order.
2615 * Touches every class in specified order:
2616 * - first the super class
2617 * - second the class itself
2618 * If new classes are created during the traversal these
2619 * will be visited, too.
2620 * Starts the walk at arbitrary classes.
2621 * Executes pre when first visiting a class. Executes post after
2622 * visiting all superclasses.
2624 * The arguments pre, post, env may be NULL. */
2625 void type_walk_super(type_walk_func *pre, type_walk_func *post, void *env);
2627 /** Same as type_walk_super2sub, but visits only class types.
2628 Executes pre for a class if all superclasses have been visited.
2629 Then iterates to subclasses. Executes post after return from
2631 Does not visit global type, frame types.
2633 @bug ?? something is wrong with this.
2635 void class_walk_super2sub(class_walk_func *pre, class_walk_func *post,
2639 * the entity walk function. A function type for entity walkers.
2641 * @param ent points to the visited entity
2642 * @param env free environment pointer
2644 typedef void entity_walk_func(ir_entity *ent, void *env);
2647 * Walks over all entities in the type.
2649 * @param tp the type
2650 * @param doit the entity walker function
2651 * @param env environment, will be passed to the walker function
2653 void walk_types_entities(ir_type *tp, entity_walk_func *doit, void *env);
2656 * If we have the closed world assumption, we can calculate the
2657 * finalization of classes and entities by inspecting the class hierarchy.
2658 * After this is done, all classes and entities that are not overridden
2659 * anymore have the final property set.
2661 void types_calc_finalization(void);