4 #include "firm_config.h"
6 #include "firm_types.h"
10 #include "belistsched.h"
11 #include "beilpsched.h"
15 #include "bemachine.h"
18 typedef enum _arch_register_type_t {
19 arch_register_type_none = 0,
20 arch_register_type_caller_save = 1, /**< The register must be saved by the caller
21 upon a function call. It thus can be overwritten
22 in the called function. */
23 arch_register_type_callee_save = 2, /**< The register must be saved by the caller
24 upon a function call. It thus can be overwritten
25 in the called function. */
26 arch_register_type_ignore = 4, /**< Do not consider this register when allocating. */
27 arch_register_type_joker = 8, /**< The emitter can choose an arbitrary register */
28 arch_register_type_virtual = 16, /**< This is just a virtual register */
29 } arch_register_type_t;
32 * Convenience macro to check for register type.
33 * @param req A pointer to register.
34 * @param kind The kind of type to check for (see arch_register_type_t).
35 * @return 1, If register is of given kind, 0 if not.
37 #define arch_register_type_is(reg, kind) \
38 (((reg)->type & arch_register_type_ ## kind) != 0)
43 struct _arch_register_t {
44 const char *name; /**< The name of the register. */
45 const arch_register_class_t *reg_class; /**< The class the register belongs to. */
46 int index; /**< The index of the register in the class. */
47 arch_register_type_t type; /**< The type of the register. */
48 void *data; /**< Custom data. */
51 static INLINE const arch_register_class_t *
52 _arch_register_get_class(const arch_register_t *reg)
54 return reg->reg_class;
57 static INLINE int _arch_register_get_index(const arch_register_t *reg)
62 static INLINE const char *_arch_register_get_name(const arch_register_t *reg)
67 #define arch_register_get_class(reg) _arch_register_get_class(reg)
68 #define arch_register_get_index(reg) _arch_register_get_index(reg)
69 #define arch_register_get_name(reg) _arch_register_get_name(reg)
72 * A class of registers.
73 * Like general purpose or floating point.
75 struct _arch_register_class_t {
76 const char *name; /**< The name of the register class. */
77 int n_regs; /**< Number of registers in this class. */
78 ir_mode *mode; /**< The mode of the register class. */
79 const arch_register_t *regs; /**< The array of registers. */
82 /** return the number of registers in this register class */
83 #define arch_register_class_n_regs(cls) ((cls)->n_regs)
85 /** return the largest mode of this register class */
86 #define arch_register_class_mode(cls) ((cls)->mode)
88 /** return the name of this register class */
89 #define arch_register_class_name(cls) ((cls)->name)
92 * Put all registers in a class into a bitset.
93 * @param cls The class.
94 * @param bs The bitset. May be NULL.
95 * @return The number of registers in the class.
97 extern int arch_register_class_put(const arch_register_class_t *cls, bitset_t *bs);
99 static INLINE const arch_register_t *
100 _arch_register_for_index(const arch_register_class_t *cls, int idx)
102 assert(0 <= idx && idx < cls->n_regs);
103 return &cls->regs[idx];
106 #define arch_register_for_index(cls, idx) \
107 _arch_register_for_index(cls, idx)
109 typedef enum _arch_operand_type_t {
110 arch_operand_type_invalid,
111 arch_operand_type_memory,
112 arch_operand_type_register,
113 arch_operand_type_immediate,
114 arch_operand_type_symconst,
115 arch_operand_type_last
116 } arch_operand_type_t;
119 * Different types of register allocation requirements.
121 typedef enum _arch_register_req_type_t {
122 arch_register_req_type_none = 0, /**< No register requirement. */
123 arch_register_req_type_normal = 1, /**< All registers in the class are allowed. */
124 arch_register_req_type_limited = 2, /**< Only a real subset of the class is allowed. */
125 arch_register_req_type_should_be_same = 4, /**< The register should be equal another one at the node. */
126 arch_register_req_type_should_be_different = 8, /**< The register must be unequal to some other at the node. */
127 arch_register_req_type_should_be_different_from_all = 16, /**< The register must be different from all in's at the node */
128 } arch_register_req_type_t;
131 * Convenience macro to check for set constraints.
132 * @param req A pointer to register requirements.
133 * @param kind The kind of constraint to check for (see arch_register_req_type_t).
134 * @return 1, If the kind of constraint is present, 0 if not.
136 #define arch_register_req_is(req, kind) \
137 (((req)->type & (arch_register_req_type_ ## kind)) != 0)
140 * Expresses requirements to register allocation for an operand.
142 typedef struct _arch_register_req_t {
143 arch_register_req_type_t type; /**< The type of the constraint. */
144 const arch_register_class_t *cls; /**< The register class this constraint belongs to. */
146 const unsigned *limited; /**< allowed register bitset */
148 int other_same; /**< The in number which shall have
149 the same res (should_be_same)*/
150 int other_different; /**< The other node from which this
151 one's register must be different
152 (case must_be_different). */
153 } arch_register_req_t;
155 extern const arch_register_req_t *arch_no_register_req;
158 * Format a register requirements information into a string.
159 * @param buf The string where to put it to.
160 * @param len The size of @p buf.
161 * @param req The requirements structure to format.
162 * @return A pointer to buf.
164 extern char *arch_register_req_format(char *buf, size_t len, const arch_register_req_t *req, const ir_node *node);
168 * Certain node classes which are relevant for the register allocator.
170 typedef enum _arch_irn_class_t {
171 arch_irn_class_normal = 1 << 0,
172 arch_irn_class_spill = 1 << 1,
173 arch_irn_class_reload = 1 << 2,
174 arch_irn_class_copy = 1 << 3,
175 arch_irn_class_perm = 1 << 4,
176 arch_irn_class_branch = 1 << 5,
177 arch_irn_class_call = 1 << 6,
178 arch_irn_class_const = 1 << 7,
179 arch_irn_class_load = 1 << 8,
180 arch_irn_class_store = 1 << 9,
181 arch_irn_class_stackparam = 1 << 10,
185 * An inverse operation returned by the backend
187 typedef struct _arch_inverse_t {
188 int n; /**< count of nodes returned in nodes array */
189 int costs; /**< costs of this remat */
191 /**< nodes for this inverse operation. shall be in
192 * schedule order. last element is the target value
198 * Some flags describing a node in more detail.
200 typedef enum _arch_irn_flags_t {
201 arch_irn_flags_none = 0, /**< Node flags. */
202 arch_irn_flags_dont_spill = 1, /**< This must not be spilled. */
203 arch_irn_flags_rematerializable = 2, /**< This can be replicated instead of spilled/reloaded. */
204 arch_irn_flags_ignore = 4, /**< Ignore node during register allocation. */
205 arch_irn_flags_modify_sp = 8, /**< I modify the stack pointer. */
206 arch_irn_flags_last = arch_irn_flags_modify_sp
210 * Get the string representation of a flag.
211 * This functions does not handle or'ed bitmasks of flags.
212 * @param flag The flag.
213 * @return The flag as a string.
215 extern const char *arch_irn_flag_str(arch_irn_flags_t flag);
217 struct _arch_irn_ops_if_t {
220 * Get the register requirements for a given operand.
221 * @param self The self pointer.
222 * @param irn The node.
223 * @param pos The operand's position
224 * (-1 for the result of the node, 0..n for the input operands).
225 * @return The register requirements for the selected operand.
226 * The pointer returned is never NULL.
228 const arch_register_req_t *(*get_irn_reg_req)(const void *self,
229 const ir_node *irn, int pos);
232 * Set the register for an output operand.
233 * @param irn The node.
234 * @param reg The register allocated to that operand.
235 * @note If the operand is not a register operand,
236 * the call is ignored.
238 void (*set_irn_reg)(const void *self, ir_node *irn, const arch_register_t *reg);
241 * Get the register allocated for an output operand.
242 * @param irn The node.
243 * @return The register allocated at that operand. NULL, if
244 * the operand was no register operand or
245 * @c arch_register_invalid, if no register has yet been
246 * allocated for this node.
248 const arch_register_t *(*get_irn_reg)(const void *self, const ir_node *irn);
252 * @param irn The node.
253 * @return A classification.
255 arch_irn_class_t (*classify)(const void *self, const ir_node *irn);
258 * Get the flags of a node.
259 * @param self The irn ops themselves.
260 * @param irn The node.
261 * @return A set of flags.
263 arch_irn_flags_t (*get_flags)(const void *self, const ir_node *irn);
266 * Get the entity on the stack frame this node depends on.
267 * @param self The this pointer.
268 * @param irn The node in question.
269 * @return The entity on the stack frame or NULL, if the node does not have a
270 * stack frame entity.
272 ir_entity *(*get_frame_entity)(const void *self, const ir_node *irn);
275 * Set the entity on the stack frame this node depends on.
276 * @param self The this pointer.
277 * @param irn The node in question.
278 * @param ent The entity to set
280 void (*set_frame_entity)(const void *self, ir_node *irn, ir_entity *ent);
283 * Set the offset of a node carrying an entity on the stack frame.
284 * @param self The this pointer.
285 * @param irn The node.
286 * @param offset The offset of the node's stack frame entity.
288 void (*set_frame_offset)(const void *self, ir_node *irn, int offset);
291 * Returns the delta of the stackpointer for nodes that increment or
292 * decrement the stackpointer with a constant value. (push, pop
293 * nodes on most architectures).
294 * A positive value stands for an expanding stack area, a negative value for
297 * @param self The this pointer
298 * @param irn The node
299 * @return 0 if the stackpointer is not modified with a constant
300 * value, otherwise the increment/decrement value
302 int (*get_sp_bias)(const void *self, const ir_node *irn);
305 * Returns an inverse operation which yields the i-th argument
306 * of the given node as result.
308 * @param self The this pointer.
309 * @param irn The original operation
310 * @param i Index of the argument we want the inverse operation to yield
311 * @param inverse struct to be filled with the resulting inverse op
312 * @param obstack The obstack to use for allocation of the returned nodes array
313 * @return The inverse operation or NULL if operation invertible
315 arch_inverse_t *(*get_inverse)(const void *self, const ir_node *irn, int i, arch_inverse_t *inverse, struct obstack *obstack);
318 * Get the estimated cycle count for @p irn.
320 * @param self The this pointer.
321 * @param irn The node.
323 * @return The estimated cycle count for this operation
325 int (*get_op_estimated_cost)(const void *self, const ir_node *irn);
328 * Asks the backend whether operand @p i of @p irn can be loaded form memory internally
330 * @param self The this pointer.
331 * @param irn The node.
332 * @param i Index of the argument we would like to know whether @p irn can load it form memory internally
334 * @return nonzero if argument can be loaded or zero otherwise
336 int (*possible_memory_operand)(const void *self, const ir_node *irn, unsigned int i);
339 * Ask the backend to assimilate @p reload of operand @p i into @p irn.
341 * @param self The this pointer.
342 * @param irn The node.
343 * @param spill The spill.
344 * @param i The position of the reload.
346 void (*perform_memory_operand)(const void *self, ir_node *irn, ir_node *spill, unsigned int i);
350 * irn_ops base class.
352 struct _arch_irn_ops_t {
353 const arch_irn_ops_if_t *impl;
356 extern const arch_irn_ops_t *arch_get_irn_ops(const arch_env_t *env, const ir_node *irn);
358 extern void arch_set_frame_offset(const arch_env_t *env, ir_node *irn, int bias);
360 extern ir_entity *arch_get_frame_entity(const arch_env_t *env, ir_node *irn);
361 extern void arch_set_frame_entity(const arch_env_t *env, ir_node *irn, ir_entity *ent);
362 extern int arch_get_sp_bias(const arch_env_t *env, ir_node *irn);
364 extern int arch_get_op_estimated_cost(const arch_env_t *env, const ir_node *irn);
365 extern arch_inverse_t *arch_get_inverse(const arch_env_t *env, const ir_node *irn, int i, arch_inverse_t *inverse, struct obstack *obstack);
366 extern int arch_possible_memory_operand(const arch_env_t *env, const ir_node *irn, unsigned int i);
367 extern void arch_perform_memory_operand(const arch_env_t *env, ir_node *irn, ir_node *spill, unsigned int i);
370 * Get the register requirements for a node.
371 * @param env The architecture environment.
372 * @param req A pointer to a requirements structure, where the data can
374 * @param irn The node.
375 * @param pos The position of the operand you're interested in.
376 * @return A pointer to the register requirements which may <b>not</b>
377 * neccessarily be equal to @p req. If NULL is returned, the
378 * operand was no register operand.
380 extern const arch_register_req_t *
381 arch_get_register_req(const arch_env_t *env, const ir_node *irn, int pos);
384 * Check if an operand is a register operand.
385 * @param env The environment.
386 * @param irn The node.
387 * @param pos The position of the operand.
388 * @return 1, if the operand is significant for register allocation, 0
391 extern int arch_is_register_operand(const arch_env_t *env,
392 const ir_node *irn, int pos);
395 * Get the number of allocatable registers concerning
396 * a register class for an operand of a node.
397 * @param env The environment.
398 * @param irn The node.
399 * @param pos The postition of the node's operand.
400 * @param bs The bitset all allocatable registers shall be put into.
401 * Note, that you can also pass NULL here. If you don't,
402 * make sure, the bitset is as large as the register class
404 * @return The amount of registers allocatable for that operand.
406 extern int arch_get_allocatable_regs(const arch_env_t *env, const ir_node *irn, int pos, bitset_t *bs);
409 * Put all registers which shall not be ignored by the register
410 * allocator in a bit set.
411 * @param env The arch env.
412 * @param cls The register class to consider.
413 * @param bs The bit set to put the registers to.
415 extern void arch_put_non_ignore_regs(const arch_env_t *env, const arch_register_class_t *cls, bitset_t *bs);
418 * Check, if a register is assignable to an operand of a node.
419 * @param env The architecture environment.
420 * @param irn The node.
421 * @param pos The position of the operand.
422 * @param reg The register.
423 * @return 1, if the register might be allocated to the operand 0 if not.
425 extern int arch_reg_is_allocatable(const arch_env_t *env,
426 const ir_node *irn, int pos, const arch_register_t *reg);
429 * Get the register class of an operand of a node.
430 * @param env The architecture environment.
431 * @param irn The node.
432 * @param pos The position of the operand, -1 for the output.
433 * @return The register class of the operand or NULL, if
434 * operand is a non-register operand.
436 extern const arch_register_class_t *
437 arch_get_irn_reg_class(const arch_env_t *env, const ir_node *irn, int pos);
440 * Get the register allocated at a certain output operand of a node.
441 * @param env The arch environment.
442 * @param irn The node.
443 * @return The register allocated for this operand
445 extern const arch_register_t *
446 arch_get_irn_register(const arch_env_t *env, const ir_node *irn);
449 * Set the register for a certain output operand.
450 * @param env The architecture environment.
451 * @param irn The node.
452 * @param idx The index of the output operand.
453 * @param reg The register.
455 extern void arch_set_irn_register(const arch_env_t *env, ir_node *irn,
456 const arch_register_t *reg);
460 * @param env The architecture environment.
461 * @param irn The node.
462 * @return A classification of the node.
464 extern arch_irn_class_t arch_irn_classify(const arch_env_t *env, const ir_node *irn);
466 #define arch_irn_class_is(env, irn, irn_class) ((arch_irn_classify(env, irn) & arch_irn_class_ ## irn_class) != 0)
469 * Get the flags of a node.
470 * @param env The architecture environment.
471 * @param irn The node.
474 extern arch_irn_flags_t arch_irn_get_flags(const arch_env_t *env, const ir_node *irn);
476 #define arch_irn_is(env, irn, flag) ((arch_irn_get_flags(env, irn) & arch_irn_flags_ ## flag) != 0)
478 #define arch_irn_has_reg_class(env, irn, pos, cls) \
479 ((cls) == arch_get_irn_reg_class(env, irn, pos))
481 #define arch_irn_consider_in_reg_alloc(env, cls, irn) \
482 (arch_irn_has_reg_class(env, irn, -1, cls) && !arch_irn_is(env, irn, ignore))
485 * Somebody who can be asked about IR nodes.
487 struct _arch_irn_handler_t {
490 * Get the operations of an irn.
491 * @param self The handler from which the method is invoked.
492 * @param irn Some node.
493 * @return Operations for that irn.
495 const void *(*get_irn_ops)(const arch_irn_handler_t *handler,
500 * The code generator interface.
502 struct _arch_code_generator_if_t {
504 * Initialize the code generator.
505 * @param birg A backend IRG session.
506 * @return A newly created code generator.
508 void *(*init)(be_irg_t *birg);
511 * Called before abi introduce.
513 void (*before_abi)(void *self);
516 * Called, when the graph is being normalized.
518 void (*prepare_graph)(void *self);
521 * Backend may provide an own spiller.
522 * This spiller needs to spill all register classes.
524 void (*spill)(void *self, be_irg_t *birg);
527 * Called before scheduling.
529 void (*before_sched)(void *self);
532 * Called before register allocation.
534 void (*before_ra)(void *self);
537 * Called after register allocation.
539 void (*after_ra)(void *self);
542 * Called directly before done is called. This should be the last place
543 * where the irg is modified.
545 void (*finish)(void *self);
548 * Called after everything happened. This call should emit the final
549 * assembly code but avoid changing the irg.
550 * The code generator must also be de-allocated here.
552 void (*done)(void *self);
556 * helper macro: call function func from the code generator
557 * if it's implemented.
559 #define _arch_cg_call(cg, func) \
561 if((cg)->impl->func) \
562 (cg)->impl->func(cg); \
565 #define _arch_cg_call_env(cg, env, func) \
567 if((cg)->impl->func) \
568 (cg)->impl->func(cg, env); \
571 #define arch_code_generator_before_abi(cg) _arch_cg_call(cg, before_abi)
572 #define arch_code_generator_prepare_graph(cg) _arch_cg_call(cg, prepare_graph)
573 #define arch_code_generator_before_sched(cg) _arch_cg_call(cg, before_sched)
574 #define arch_code_generator_before_ra(cg) _arch_cg_call(cg, before_ra)
575 #define arch_code_generator_after_ra(cg) _arch_cg_call(cg, after_ra)
576 #define arch_code_generator_finish(cg) _arch_cg_call(cg, finish)
577 #define arch_code_generator_done(cg) _arch_cg_call(cg, done)
578 #define arch_code_generator_spill(cg, birg) _arch_cg_call_env(cg, birg, spill)
579 #define arch_code_generator_has_spiller(cg) ((cg)->impl->spill != NULL)
582 * Code generator base class.
584 struct _arch_code_generator_t {
585 const arch_code_generator_if_t *impl;
592 const arch_isa_if_t *impl;
593 const arch_register_t *sp; /** The stack pointer register. */
594 const arch_register_t *bp; /** The base pointer register. */
595 const int stack_dir; /** -1 for decreasing, 1 for increasing. */
596 const be_main_env_t *main_env; /** the be main environment */
599 #define arch_isa_stack_dir(isa) ((isa)->stack_dir)
600 #define arch_isa_sp(isa) ((isa)->sp)
601 #define arch_isa_bp(isa) ((isa)->bp)
604 * Architecture interface.
606 struct _arch_isa_if_t {
608 * Initialize the isa interface.
609 * @param file_handle the file handle to write the output to
610 * @param main_env the be main environment
611 * @return a new isa instance
613 void *(*init)(FILE *file_handle);
616 * Free the isa instance.
618 void (*done)(void *self);
621 * Get the the number of register classes in the isa.
622 * @return The number of register classes.
624 int (*get_n_reg_class)(const void *self);
627 * Get the i-th register class.
628 * @param i The number of the register class.
629 * @return The register class.
631 const arch_register_class_t *(*get_reg_class)(const void *self, int i);
634 * Get the register class which shall be used to store a value of a given mode.
635 * @param self The this pointer.
636 * @param mode The mode in question.
637 * @return A register class which can hold values of the given mode.
639 const arch_register_class_t *(*get_reg_class_for_mode)(const void *self, const ir_mode *mode);
642 * Get the ABI restrictions for procedure calls.
643 * @param self The this pointer.
644 * @param method_type The type of the method (procedure) in question.
645 * @param p The array of parameter locations to be filled.
647 void (*get_call_abi)(const void *self, ir_type *method_type, be_abi_call_t *abi);
650 * The irn handler for this architecture.
651 * The irn handler is registered by the Firm back end
652 * when the architecture is initialized.
655 const arch_irn_handler_t *(*get_irn_handler)(const void *self);
658 * Get the code generator interface.
659 * @param self The this pointer.
660 * @return Some code generator interface.
662 const arch_code_generator_if_t *(*get_code_generator_if)(void *self);
665 * Get the list scheduler to use. There is already a selector given, the
666 * backend is free to modify and/or ignore it.
668 * @param self The isa object.
669 * @param selector The selector given by options.
670 * @return The list scheduler selector.
672 const list_sched_selector_t *(*get_list_sched_selector)(const void *self, list_sched_selector_t *selector);
675 * Get the ILP scheduler to use.
676 * @param self The isa object.
677 * @return The ILP scheduler selector
679 const ilp_sched_selector_t *(*get_ilp_sched_selector)(const void *self);
682 * Get the necessary alignment for storing a register of given class.
683 * @param self The isa object.
684 * @param cls The register class.
685 * @return The alignment in bytes.
687 int (*get_reg_class_alignment)(const void *self, const arch_register_class_t *cls);
690 * A "static" function, returns the frontend settings
691 * needed for this backend.
693 const backend_params *(*get_params)(void);
696 * Returns an 2-dim array of execution units, @p irn can be executed on.
697 * The first dimension is the type, the second the allowed units of this type.
698 * Each dimension is a NULL terminated list.
699 * @param self The isa object.
700 * @param irn The node.
701 * @return An array of allowed execution units.
703 * { unit1_of_tp1, ..., unitX1_of_tp1, NULL },
705 * { unit1_of_tpY, ..., unitXn_of_tpY, NULL },
709 const be_execution_unit_t ***(*get_allowed_execution_units)(const void *self, const ir_node *irn);
712 * Return the abstract machine for this isa.
713 * @param self The isa object.
715 const be_machine_t *(*get_machine)(const void *self);
718 * Return an ordered list of irgs where code should be generated for.
719 * If NULL is returned, all irg will be taken into account and they will be
720 * generated in an arbitrary order.
721 * @param self The isa object.
722 * @param irgs A flexible array ARR_F of length 0 where the backend cann append the desired irgs.
723 * @return A flexible array ARR_F containing all desired irgs in the desired order.
725 ir_graph **(*get_backend_irg_list)(const void *self, ir_graph ***irgs);
728 #define arch_isa_get_n_reg_class(isa) ((isa)->impl->get_n_reg_class(isa))
729 #define arch_isa_get_reg_class(isa,i) ((isa)->impl->get_reg_class(isa, i))
730 #define arch_isa_get_irn_handler(isa) ((isa)->impl->get_irn_handler(isa))
731 #define arch_isa_get_call_abi(isa,tp,abi) ((isa)->impl->get_call_abi((isa), (tp), (abi)))
732 #define arch_isa_get_reg_class_for_mode(isa,mode) ((isa)->impl->get_reg_class_for_mode((isa), (mode)))
733 #define arch_isa_make_code_generator(isa,irg) ((isa)->impl->make_code_generator((isa), (irg)))
734 #define arch_isa_get_reg_class_alignment(isa, cls) ((isa)->impl->get_reg_class_alignment((isa), (cls)))
735 #define arch_isa_get_allowed_execution_units(isa, irn) ((isa)->impl->get_allowed_execution_units((isa), (irn)))
736 #define arch_isa_get_machine(isa) ((isa)->impl->get_machine((isa)))
737 #define arch_isa_get_backend_irg_list(isa, irgs) ((isa)->impl->get_backend_irg_list((isa), (irgs)))
739 #define ARCH_MAX_HANDLERS 8
742 * Environment for the architecture infrastructure.
743 * Keep this everywhere you're going.
746 arch_isa_t *isa; /**< The isa about which everything is. */
748 arch_irn_handler_t const *handlers[ARCH_MAX_HANDLERS]; /**< The handlers are organized as
751 int handlers_tos; /**< The stack pointer of the handler
756 * Get the isa of an arch environment.
757 * @param env The environment.
758 * @return The isa with which the env was initialized with.
760 #define arch_env_get_isa(env) ((env)->isa)
763 * Initialize the architecture environment struct.
764 * @param isa The isa which shall be put into the environment.
765 * @param file_handle The file handle
766 * @return The environment.
768 extern arch_env_t *arch_env_init(arch_env_t *env, const arch_isa_if_t *isa, FILE *file_handle, be_main_env_t *main_env);
771 * Add a node handler to the environment.
772 * @param env The environment.
773 * @param handler A node handler.
774 * @return The environment itself.
776 extern arch_env_t *arch_env_push_irn_handler(arch_env_t *env, const arch_irn_handler_t *handler);
779 * Remove a node handler from the handler stack.
780 * @param env The architecture environment.
781 * @return The popped handler.
783 extern const arch_irn_handler_t *arch_env_pop_irn_handler(arch_env_t *env);
786 * Register an instruction set architecture
788 void be_register_isa_if(const char *name, const arch_isa_if_t *isa);
790 #endif /* _FIRM_BEARCH_H */