4 #include "firm_config.h"
7 #include <libcore/lc_opts.h>
20 #include "belistsched.h"
22 typedef struct _arch_register_class_t arch_register_class_t;
23 typedef struct _arch_register_t arch_register_t;
24 typedef struct _arch_enum_t arch_enum_t;
25 typedef struct _arch_enum_member_t arch_enum_member_t;
26 typedef struct _arch_isa_if_t arch_isa_if_t;
27 typedef struct _arch_isa_t arch_isa_t;
28 typedef struct _arch_env_t arch_env_t;
29 typedef struct _arch_irn_ops_t arch_irn_ops_t;
30 typedef struct _arch_irn_handler_t arch_irn_handler_t;
31 typedef struct _arch_code_generator_t arch_code_generator_t;
32 typedef struct _arch_code_generator_if_t arch_code_generator_if_t;
34 struct _be_node_factory_t;
36 typedef enum _arch_register_type_t {
37 arch_register_type_none = 0,
38 arch_register_type_write_invariant,
39 arch_register_type_caller_saved, /**< The register must be saved by the caller
40 upon a function call. It thus can be overwritten
41 in the called function. */
42 arch_register_type_callee_saved, /**< The register must be saved by the called function,
43 it thus survives a function call. */
44 arch_register_type_ignore /**< Do not consider this register when allocating. */
45 } arch_register_type_t;
50 struct _arch_register_t {
51 const char *name; /**< The name of the register. */
52 const arch_register_class_t *reg_class; /**< The class the register belongs to. */
53 int index; /**< The index of the register in the class. */
54 arch_register_type_t type; /**< The type of the register. */
55 void *data; /**< Custom data. */
58 static INLINE const arch_register_class_t *
59 _arch_register_get_class(const arch_register_t *reg)
61 return reg->reg_class;
64 static INLINE int _arch_register_get_index(const arch_register_t *reg)
69 #define arch_register_get_class(reg) _arch_register_get_class(reg)
70 #define arch_register_get_index(reg) _arch_register_get_index(reg)
71 #define arch_register_get_name(reg) ((reg)->name)
74 * A class of registers.
75 * Like general purpose or floating point.
77 struct _arch_register_class_t {
78 const char *name; /**< The name of the register class. */
79 int n_regs; /**< Number of registers in this class. */
80 const arch_register_t *regs; /**< The array of registers. */
83 #define arch_register_class_n_regs(cls) ((cls)->n_regs)
86 * Put all registers in a class into a bitset.
87 * @param cls The class.
88 * @param bs The bitset. May be NULL.
89 * @return The number of registers in the class.
91 extern int arch_register_class_put(const arch_register_class_t *cls, bitset_t *bs);
93 static INLINE const arch_register_t *
94 _arch_register_for_index(const arch_register_class_t *cls, int idx)
96 assert(0 <= idx && idx < cls->n_regs);
97 return &cls->regs[idx];
100 #define arch_register_for_index(cls, idx) \
101 _arch_register_for_index(cls, idx)
104 * Get the register set for a register class.
105 * @param cls The register class.
106 * @return The set containing all registers in the class.
108 #define arch_get_register_set_for_class(cls) ((cls)->set)
113 struct _arch_immediate_t {
114 const char *name; /**< The name of the immediate. */
115 ir_mode *mode; /**< The mode of the immediate. */
119 * The member of an enum.
121 struct _arch_enum_member_t {
122 arch_enum_t *enm; /**< The enum, this member belongs to. */
126 * An enumeration operand type.
128 * Enumeration operand types can be used to describe the variants
129 * of an instruction, like giving the cases for a compare (gt, lt,
130 * eq, ...) some other special attributes of an instruction.
132 struct _arch_enum_t {
133 int n_members; /**< The number of members in this enum. */
134 arch_enum_member_t *members[1]; /**< The array of members. */
137 typedef enum _arch_operand_type_t {
138 arch_operand_type_invalid,
139 arch_operand_type_memory,
140 arch_operand_type_register,
141 arch_operand_type_immediate,
142 arch_operand_type_symconst,
143 arch_operand_type_last
144 } arch_operand_type_t;
147 * Different types of register allocation requirements.
149 typedef enum _arch_register_req_type_t {
150 arch_register_req_type_none = 0, /**< No register requirement. */
152 arch_register_req_type_normal = 1, /**< All registers in the class
155 arch_register_req_type_limited = 2, /**< Only a real subset of
156 the class is allowed. */
158 arch_register_req_type_should_be_same = 4, /**< The register should be equal
159 another one at the node. */
161 arch_register_req_type_should_be_different = 8, /**< The register must be unequal
162 to some other at the node. */
164 } arch_register_req_type_t;
166 #define arch_register_req_is_constr(x) \
167 ((x)->type & (arch_register_req_type_pair + arch_register_req_type_limited - 1) != 0)
170 * Expresses requirements to register allocation for an operand.
172 typedef struct _arch_register_req_t {
173 arch_register_req_type_t type; /**< The type of the constraint. */
174 const arch_register_class_t *cls; /**< The register class this
175 constraint belongs to. */
176 int (*limited)(const ir_node *irn, int pos, bitset_t *bs);
177 /**< In case of the 'limited'
178 constraint, this function
179 must put all allowable
180 registers in the bitset and
181 return the number of registers
184 int pos; /**< In case of the equal constraint,
185 this gives the position of the
186 operand to which the register of
187 this should be equal to. Same for
189 } arch_register_req_t;
192 * Certain node classes which are relevent for the register allocator.
194 typedef enum _arch_irn_class_t {
195 arch_irn_class_normal,
196 arch_irn_class_spill,
197 arch_irn_class_reload,
200 arch_irn_class_branch
204 * Some flags describing a node in more detail.
206 typedef enum _arch_irn_flags_t {
207 arch_irn_flags_spillable = 1,
208 arch_irn_flags_rematerializable = 2
211 struct _arch_irn_ops_t {
214 * Get the register requirements for a given operand.
215 * @param self The self pointer.
216 * @param irn The node.
217 * @param pos The operand's position
218 * (-1 for the result of the node, 0..n for the input
220 * @return The register requirements for the selected operand.
221 * The pointer returned is never NULL.
223 const arch_register_req_t *(*get_irn_reg_req)(const arch_irn_ops_t *self,
224 arch_register_req_t *req, const ir_node *irn, int pos);
227 * Set the register for an output operand.
228 * @param irn The node.
229 * @param reg The register allocated to that operand.
230 * @note If the operand is not a register operand,
231 * the call is ignored.
233 void (*set_irn_reg)(const arch_irn_ops_t *self, ir_node *irn, const arch_register_t *reg);
236 * Get the register allocated for an output operand.
237 * @param irn The node.
238 * @return The register allocated at that operand. NULL, if
239 * the operand was no register operand or
240 * @c arch_register_invalid, if no register has yet been
241 * allocated for this node.
243 const arch_register_t *(*get_irn_reg)(const arch_irn_ops_t *self, const ir_node *irn);
247 * @param irn The node.
248 * @return A classification.
250 arch_irn_class_t (*classify)(const arch_irn_ops_t *self, const ir_node *irn);
253 * Get the flags of a node.
254 * @param self The irn ops themselves.
255 * @param irn The node.
256 * @return A set of flags.
258 arch_irn_flags_t (*get_flags)(const arch_irn_ops_t *self, const ir_node *irn);
263 * Get the register requirements for a node.
264 * @param env The architecture environment.
265 * @param req A pointer to a requirements structure, where the data can
267 * @param irn The node.
268 * @param pos The position of the operand you're interested in.
269 * @return A pointer to the register requirements which may <b>not</b>
270 * neccessarily be equal to @p req. If NULL is returned, the
271 * operand was no register operand.
273 extern const arch_register_req_t *
274 arch_get_register_req(const arch_env_t *env, arch_register_req_t *req,
275 const ir_node *irn, int pos);
278 * Check if an operand is a register operand.
279 * @param env The environment.
280 * @param irn The node.
281 * @param pos The position of the operand.
282 * @return 1, if the operand is significant for register allocation, 0
285 extern int arch_is_register_operand(const arch_env_t *env,
286 const ir_node *irn, int pos);
289 * Get the number of allocatable registers concerning
290 * a register class for an operand of a node.
291 * @param env The environment.
292 * @param irn The node.
293 * @param pos The postition of the node's operand.
294 * @param cls The register class.
295 * @param bs The bitset all allocatable registers shall be put into.
296 * Note, that you can also pass NULL here. If you don't,
297 * make sure, the bitset is as large as the register class
299 * @return The amount of registers allocatable for that operand.
301 extern int arch_get_allocatable_regs(const arch_env_t *env, const ir_node *irn,
302 int pos, const arch_register_class_t *cls, bitset_t *bs);
305 * Check, if a register is assignable to an operand of a node.
306 * @param env The architecture environment.
307 * @param irn The node.
308 * @param pos The position of the operand.
309 * @param reg The register.
310 * @return 1, if the register might be allocated to the operand 0 if not.
312 extern int arch_reg_is_allocatable(const arch_env_t *env,
313 const ir_node *irn, int pos, const arch_register_t *reg);
316 * Get the register class of an operand of a node.
317 * @param env The architecture environment.
318 * @param irn The node.
319 * @param pos The position of the operand.
320 * @return The register class of the operand or NULL, if
321 * operand is a non-register operand.
323 extern const arch_register_class_t *
324 arch_get_irn_reg_class(const arch_env_t *env, const ir_node *irn, int pos);
327 * Get the register allocated at a certain output operand of a node.
328 * @param env The arch environment.
329 * @param irn The node.
330 * @return The register allocated for this operand
332 extern const arch_register_t *
333 arch_get_irn_register(const arch_env_t *env, const ir_node *irn);
336 * Set the register for a certain output operand.
337 * @param env The architecture environment.
338 * @param irn The node.
339 * @param idx The index of the output operand.
340 * @param reg The register.
342 extern void arch_set_irn_register(const arch_env_t *env, ir_node *irn,
343 const arch_register_t *reg);
347 * @param env The architecture environment.
348 * @param irn The node.
349 * @return A classification of the node.
351 extern arch_irn_class_t arch_irn_classify(const arch_env_t *env, const ir_node *irn);
354 * Get the flags of a node.
355 * @param env The architecture environment.
356 * @param irn The node.
359 extern arch_irn_flags_t arch_irn_get_flags(const arch_env_t *env, const ir_node *irn);
361 #define arch_irn_has_reg_class(env, irn, pos, cls) \
362 ((cls) == arch_get_irn_reg_class(env, irn, pos))
365 * Somebody who can be asked about nodes.
367 struct _arch_irn_handler_t {
370 * Get the operations of an irn.
371 * @param self The handler from which the method is invoked.
372 * @param irn Some node.
373 * @return Operations for that irn.
375 const arch_irn_ops_t *(*get_irn_ops)(const arch_irn_handler_t *handler,
381 * The code generator.
383 struct _arch_code_generator_if_t {
387 * Initialize the code generator.
388 * @param file The file to dump to.
389 * @param irg The function to generate code for.
390 * @param env The architecture environment.
391 * @return A newly created code generator.
393 void *(*init)(FILE *file, ir_graph *irg, const arch_env_t *env);
396 * Called, when the graph is being normalized.
398 void (*prepare_graph)(void *self);
401 * Called before scheduling.
403 void (*before_sched)(void *self);
406 * Called before register allocation.
408 void (*before_ra)(void *self);
411 * Called after everything happened.
412 * The code generator must also be de-allocated here.
414 void (*done)(void *self);
418 #define _arch_cg_call(cg, func) \
420 if((cg)->impl->func) \
421 (cg)->impl->func(cg); \
424 #define arch_code_generator_prepare_graph(cg) _arch_cg_call(cg, prepare_graph)
425 #define arch_code_generator_before_sched(cg) _arch_cg_call(cg, before_sched)
426 #define arch_code_generator_before_ra(cg) _arch_cg_call(cg, before_ra)
427 #define arch_code_generator_done(cg) _arch_cg_call(cg, done)
430 * Code generator base class.
432 struct _arch_code_generator_t {
433 const arch_code_generator_if_t *impl;
440 const arch_isa_if_t *impl;
444 * Architecture interface.
446 struct _arch_isa_if_t {
449 void (*register_options)(lc_opt_entry_t *grp);
453 * Initialize the isa interface.
458 * Free the isa instance.
460 void (*done)(void *self);
463 * Get the the number of register classes in the isa.
464 * @return The number of register classes.
466 int (*get_n_reg_class)(const void *self);
469 * Get the i-th register class.
470 * @param i The number of the register class.
471 * @return The register class.
473 const arch_register_class_t *(*get_reg_class)(const void *self, int i);
476 * The irn handler for this architecture.
477 * The irn handler is registered by the Firm back end
478 * when the architecture is initialized.
481 const arch_irn_handler_t *(*get_irn_handler)(const void *self);
484 * Get the code generator interface.
485 * @param self The this pointer.
486 * @return Some code generator interface.
488 const arch_code_generator_if_t *(*get_code_generator)(void *self);
491 * Get the list scheduler to use.
492 * @param self The isa object.
493 * @return The list scheduler selector.
495 const list_sched_selector_t *(*get_list_sched_selector)(const void *self);
498 #define arch_isa_get_n_reg_class(isa) ((isa)->impl->get_n_reg_class(isa))
499 #define arch_isa_get_reg_class(isa,i) ((isa)->impl->get_reg_class(isa, i))
500 #define arch_isa_get_irn_handler(isa) ((isa)->impl->get_irn_handler(isa))
501 #define arch_isa_make_code_generator(isa,irg) ((isa)->impl->make_code_generator(isa, irg))
503 #define ARCH_MAX_HANDLERS 8
506 * Environment for the architecture infrastructure.
507 * Keep this everywhere you're going.
510 const struct _be_node_factory_t *node_factory; /**< The node factory for be nodes. */
511 arch_isa_t *isa; /**< The isa about which everything is. */
513 arch_irn_handler_t const *handlers[ARCH_MAX_HANDLERS]; /**< The handlers are organized as
516 int handlers_tos; /**< The stack pointer of the handler
521 * Get the isa of an arch environment.
522 * @param env The environment.
523 * @return The isa with which the env was initialized with.
525 #define arch_env_get_isa(env) ((env)->isa)
528 * Initialize the architecture environment struct.
529 * @param isa The isa which shall be put into the environment.
530 * @return The environment.
532 extern arch_env_t *arch_env_init(arch_env_t *env, const arch_isa_if_t *isa);
535 * Add a node handler to the environment.
536 * @param env The environment.
537 * @param handler A node handler.
538 * @return The environment itself.
540 extern arch_env_t *arch_env_add_irn_handler(arch_env_t *env,
541 const arch_irn_handler_t *handler);
543 #endif /* _FIRM_BEARCH_H */