2 * This is the main ia32 firm backend driver.
17 #include "pseudo_irg.h"
21 #include "iredges_t.h"
29 #include "../beabi.h" /* the general register allocator interface */
30 #include "../benode_t.h"
31 #include "../belower.h"
32 #include "../besched_t.h"
34 #include "bearch_ia32_t.h"
36 #include "ia32_new_nodes.h" /* ia32 nodes interface */
37 #include "gen_ia32_regalloc_if.h" /* the generated interface (register type and class defenitions) */
38 #include "ia32_gen_decls.h" /* interface declaration emitter */
39 #include "ia32_transform.h"
40 #include "ia32_emitter.h"
41 #include "ia32_map_regs.h"
42 #include "ia32_optimize.h"
44 #define DEBUG_MODULE "firm.be.ia32.isa"
47 static set *cur_reg_set = NULL;
50 #define is_Start(irn) (get_irn_opcode(irn) == iro_Start)
52 ir_node *ia32_new_NoReg_gp(ia32_code_gen_t *cg) {
53 return be_abi_get_callee_save_irn(cg->birg->abi, &ia32_gp_regs[REG_XXX]);
56 ir_node *ia32_new_NoReg_fp(ia32_code_gen_t *cg) {
57 return be_abi_get_callee_save_irn(cg->birg->abi, &ia32_fp_regs[REG_XXXX]);
60 /**************************************************
63 * _ __ ___ __ _ __ _| | | ___ ___ _| |_
64 * | '__/ _ \/ _` | / _` | | |/ _ \ / __| | | _|
65 * | | | __/ (_| | | (_| | | | (_) | (__ | | |
66 * |_| \___|\__, | \__,_|_|_|\___/ \___| |_|_|
69 **************************************************/
71 static ir_node *my_skip_proj(const ir_node *n) {
78 * Return register requirements for an ia32 node.
79 * If the node returns a tuple (mode_T) then the proj's
80 * will be asked for this information.
82 static const arch_register_req_t *ia32_get_irn_reg_req(const void *self, arch_register_req_t *req, const ir_node *irn, int pos) {
83 const ia32_register_req_t *irn_req;
84 long node_pos = pos == -1 ? 0 : pos;
85 ir_mode *mode = get_irn_mode(irn);
86 firm_dbg_module_t *mod = firm_dbg_register(DEBUG_MODULE);
88 if (mode == mode_T || mode == mode_M) {
89 DBG((mod, LEVEL_1, "ignoring mode_T, mode_M node %+F\n", irn));
93 DBG((mod, LEVEL_1, "get requirements at pos %d for %+F ... ", pos, irn));
98 node_pos = ia32_translate_proj_pos(irn);
104 irn = my_skip_proj(irn);
106 DB((mod, LEVEL_1, "skipping Proj, going to %+F at pos %d ... ", irn, node_pos));
109 if (is_ia32_irn(irn)) {
111 irn_req = get_ia32_in_req(irn, pos);
114 irn_req = get_ia32_out_req(irn, node_pos);
117 DB((mod, LEVEL_1, "returning reqs for %+F at pos %d\n", irn, pos));
119 memcpy(req, &(irn_req->req), sizeof(*req));
121 if (arch_register_req_is(&(irn_req->req), should_be_same)) {
122 assert(irn_req->same_pos >= 0 && "should be same constraint for in -> out NYI");
123 req->other_same = get_irn_n(irn, irn_req->same_pos);
126 if (arch_register_req_is(&(irn_req->req), should_be_different)) {
127 assert(irn_req->different_pos >= 0 && "should be different constraint for in -> out NYI");
128 req->other_different = get_irn_n(irn, irn_req->different_pos);
132 /* treat Phi like Const with default requirements */
134 DB((mod, LEVEL_1, "returning standard reqs for %+F\n", irn));
135 if (mode_is_float(mode))
136 memcpy(req, &(ia32_default_req_ia32_fp.req), sizeof(*req));
137 else if (mode_is_int(mode) || mode_is_reference(mode))
138 memcpy(req, &(ia32_default_req_ia32_gp.req), sizeof(*req));
139 else if (mode == mode_T || mode == mode_M) {
140 DBG((mod, LEVEL_1, "ignoring Phi node %+F\n", irn));
144 assert(0 && "unsupported Phi-Mode");
147 DB((mod, LEVEL_1, "returning NULL for %+F (not ia32)\n", irn));
155 static void ia32_set_irn_reg(const void *self, ir_node *irn, const arch_register_t *reg) {
157 const ia32_irn_ops_t *ops = self;
159 DBG((ops->cg->mod, LEVEL_1, "ia32 assigned register %s to node %+F\n", reg->name, irn));
162 pos = ia32_translate_proj_pos(irn);
163 irn = my_skip_proj(irn);
166 if (is_ia32_irn(irn)) {
167 const arch_register_t **slots;
169 slots = get_ia32_slots(irn);
173 ia32_set_firm_reg(irn, reg, cur_reg_set);
177 static const arch_register_t *ia32_get_irn_reg(const void *self, const ir_node *irn) {
179 const arch_register_t *reg = NULL;
182 pos = ia32_translate_proj_pos(irn);
183 irn = my_skip_proj(irn);
186 if (is_ia32_irn(irn)) {
187 const arch_register_t **slots;
188 slots = get_ia32_slots(irn);
192 reg = ia32_get_firm_reg(irn, cur_reg_set);
198 static arch_irn_class_t ia32_classify(const void *self, const ir_node *irn) {
199 irn = my_skip_proj(irn);
201 return arch_irn_class_branch;
202 else if (is_ia32_irn(irn))
203 return arch_irn_class_normal;
208 static arch_irn_flags_t ia32_get_flags(const void *self, const ir_node *irn) {
209 irn = my_skip_proj(irn);
210 if (is_ia32_irn(irn))
211 return get_ia32_flags(irn);
217 static entity *ia32_get_frame_entity(const void *self, const ir_node *irn) {
218 return is_ia32_irn(irn) ? get_ia32_frame_ent(irn) : NULL;
221 static void ia32_set_stack_bias(const void *self, ir_node *irn, int bias) {
223 const ia32_irn_ops_t *ops = self;
225 if (is_ia32_use_frame(irn) && bias != 0) {
226 ia32_am_flavour_t am_flav = get_ia32_am_flavour(irn);
228 DBG((ops->cg->mod, LEVEL_1, "stack biased %+F with %d\n", irn, bias));
229 snprintf(buf, sizeof(buf), "%d", bias);
230 add_ia32_am_offs(irn, buf);
232 set_ia32_am_flavour(irn, am_flav);
237 be_abi_call_flags_bits_t flags;
238 const arch_isa_t *isa;
242 static void *ia32_abi_init(const be_abi_call_t *call, const arch_isa_t *isa, ir_graph *irg)
244 ia32_abi_env_t *env = xmalloc(sizeof(env[0]));
245 be_abi_call_flags_t fl = be_abi_call_get_flags(call);
246 env->flags = fl.bits;
252 static void ia32_abi_dont_save_regs(void *self, pset *s)
254 ia32_abi_env_t *env = self;
255 if(env->flags.try_omit_fp)
256 pset_insert_ptr(s, env->isa->bp);
259 static const arch_register_t *ia32_abi_prologue(void *self, pmap *reg_map)
261 ia32_abi_env_t *env = self;
265 static void ia32_abi_epilogue(void *self, ir_node *bl, ir_node **mem, pmap *reg_map)
270 * Produces the type which sits between the stack args and the locals on the stack.
271 * it will contain the return address and space to store the old base pointer.
272 * @return The Firm type modeling the ABI between type.
274 static ir_type *ia32_abi_get_between_type(void *self)
276 static ir_type *omit_fp_between_type = NULL;
277 static ir_type *between_type = NULL;
279 ia32_abi_env_t *env = self;
283 entity *ret_addr_ent;
284 entity *omit_fp_ret_addr_ent;
286 ir_type *old_bp_type = new_type_primitive(new_id_from_str("bp"), mode_P);
287 ir_type *ret_addr_type = new_type_primitive(new_id_from_str("return_addr"), mode_P);
289 between_type = new_type_class(new_id_from_str("ia32_between_type"));
290 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
291 ret_addr_ent = new_entity(between_type, new_id_from_str("ret_addr"), ret_addr_type);
293 set_entity_offset_bytes(old_bp_ent, 0);
294 set_entity_offset_bytes(ret_addr_ent, get_type_size_bytes(old_bp_type));
295 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
297 omit_fp_between_type = new_type_class(new_id_from_str("ia32_between_type_omit_fp"));
298 omit_fp_ret_addr_ent = new_entity(omit_fp_between_type, new_id_from_str("ret_addr"), ret_addr_type);
300 set_entity_offset_bytes(omit_fp_ret_addr_ent, 0);
301 set_type_size_bytes(omit_fp_between_type, get_type_size_bytes(ret_addr_type));
304 return env->flags.try_omit_fp ? omit_fp_between_type : between_type;
307 static const be_abi_callbacks_t ia32_abi_callbacks = {
310 ia32_abi_get_between_type,
311 ia32_abi_dont_save_regs,
316 /* fill register allocator interface */
318 static const arch_irn_ops_if_t ia32_irn_ops_if = {
319 ia32_get_irn_reg_req,
324 ia32_get_frame_entity,
328 ia32_irn_ops_t ia32_irn_ops = {
335 /**************************************************
338 * ___ ___ __| | ___ __ _ ___ _ __ _| |_
339 * / __/ _ \ / _` |/ _ \/ _` |/ _ \ '_ \ | | _|
340 * | (_| (_) | (_| | __/ (_| | __/ | | | | | |
341 * \___\___/ \__,_|\___|\__, |\___|_| |_| |_|_|
344 **************************************************/
347 * Transforms the standard firm graph into
350 static void ia32_prepare_graph(void *self) {
351 ia32_code_gen_t *cg = self;
352 firm_dbg_module_t *old_mod = cg->mod;
354 cg->mod = firm_dbg_register("firm.be.ia32.transform");
355 irg_walk_blkwise_graph(cg->irg, ia32_place_consts_set_modes, ia32_transform_node, cg);
356 dump_ir_block_graph_sched(cg->irg, "-transformed");
358 edges_deactivate(cg->irg);
359 dead_node_elimination(cg->irg);
360 edges_activate(cg->irg);
365 irg_walk_blkwise_graph(cg->irg, NULL, ia32_optimize_am, cg);
366 dump_ir_block_graph_sched(cg->irg, "-am");
372 * Insert copies for all ia32 nodes where the should_be_same requirement
374 * Transform Sub into Neg -- Add if IN2 == OUT
376 static void ia32_finish_irg_walker(ir_node *irn, void *env) {
377 ia32_code_gen_t *cg = env;
378 const ia32_register_req_t **reqs;
379 const arch_register_t *out_reg, *in_reg;
381 ir_node *copy, *in_node, *block;
383 if (! is_ia32_irn(irn))
386 /* nodes with destination address mode don't produce values */
387 if (get_ia32_op_type(irn) == ia32_AddrModeD)
390 reqs = get_ia32_out_req_all(irn);
391 n_res = get_ia32_n_res(irn);
392 block = get_nodes_block(irn);
394 /* check all OUT requirements, if there is a should_be_same */
395 for (i = 0; i < n_res; i++) {
396 if (arch_register_req_is(&(reqs[i]->req), should_be_same)) {
397 /* get in and out register */
398 out_reg = get_ia32_out_reg(irn, i);
399 in_node = get_irn_n(irn, reqs[i]->same_pos);
400 in_reg = arch_get_irn_register(cg->arch_env, in_node);
402 /* check if in and out register are equal */
403 if (arch_register_get_index(out_reg) != arch_register_get_index(in_reg)) {
404 DBG((cg->mod, LEVEL_1, "inserting copy for %+F in_pos %d\n", irn, reqs[i]->same_pos));
406 /* create copy from in register */
407 copy = be_new_Copy(arch_register_get_class(in_reg), cg->irg, block, in_node);
409 /* destination is the out register */
410 arch_set_irn_register(cg->arch_env, copy, out_reg);
412 /* insert copy before the node into the schedule */
413 sched_add_before(irn, copy);
416 set_irn_n(irn, reqs[i]->same_pos, copy);
421 /* check if there is a sub which need to be transformed */
422 ia32_transform_sub_to_neg_add(irn, cg);
426 * Add Copy nodes for not fulfilled should_be_equal constraints
428 static void ia32_finish_irg(ir_graph *irg, ia32_code_gen_t *cg) {
429 irg_walk_blkwise_graph(irg, NULL, ia32_finish_irg_walker, cg);
435 * Dummy functions for hooks we don't need but which must be filled.
437 static void ia32_before_sched(void *self) {
440 static void ia32_before_ra(void *self) {
446 * Transforms a be node into a Load.
448 static void transform_to_Load(ia32_transform_env_t *env) {
449 ir_node *irn = env->irn;
450 entity *ent = be_get_frame_entity(irn);
451 ir_mode *mode = env->mode;
452 ir_node *noreg = ia32_new_NoReg_gp(env->cg);
453 ir_node *nomem = new_rd_NoMem(env->irg);
454 ir_node *sched_point = NULL;
455 ir_node *ptr = get_irn_n(irn, 0);
456 ir_node *mem = be_is_Reload(irn) ? get_irn_n(irn, 1) : nomem;
457 ir_node *new_op, *proj;
458 const arch_register_t *reg;
460 if (sched_is_scheduled(irn)) {
461 sched_point = sched_prev(irn);
464 if (mode_is_float(mode)) {
465 new_op = new_rd_ia32_fLoad(env->dbg, env->irg, env->block, ptr, noreg, mem, mode_T);
468 new_op = new_rd_ia32_Load(env->dbg, env->irg, env->block, ptr, noreg, mem, mode_T);
471 set_ia32_am_support(new_op, ia32_am_Source);
472 set_ia32_op_type(new_op, ia32_AddrModeS);
473 set_ia32_am_flavour(new_op, ia32_B);
474 set_ia32_ls_mode(new_op, mode);
475 set_ia32_frame_ent(new_op, ent);
476 set_ia32_use_frame(new_op);
478 proj = new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode, pn_Load_res);
481 sched_add_after(sched_point, new_op);
482 sched_add_after(new_op, proj);
487 /* copy the register from the old node to the new Load */
488 reg = arch_get_irn_register(env->cg->arch_env, irn);
489 arch_set_irn_register(env->cg->arch_env, new_op, reg);
496 * Transforms a be node into a Store.
498 static void transform_to_Store(ia32_transform_env_t *env) {
499 ir_node *irn = env->irn;
500 entity *ent = be_get_frame_entity(irn);
501 ir_mode *mode = env->mode;
502 ir_node *noreg = ia32_new_NoReg_gp(env->cg);
503 ir_node *nomem = new_rd_NoMem(env->irg);
504 ir_node *ptr = get_irn_n(irn, 0);
505 ir_node *val = get_irn_n(irn, 1);
506 ir_node *new_op, *proj;
507 ir_node *sched_point = NULL;
509 if (sched_is_scheduled(irn)) {
510 sched_point = sched_prev(irn);
513 if (mode_is_float(mode)) {
514 new_op = new_rd_ia32_fStore(env->dbg, env->irg, env->block, ptr, noreg, val, nomem, mode_T);
517 new_op = new_rd_ia32_Store(env->dbg, env->irg, env->block, ptr, noreg, val, nomem, mode_T);
520 set_ia32_am_support(new_op, ia32_am_Dest);
521 set_ia32_op_type(new_op, ia32_AddrModeD);
522 set_ia32_am_flavour(new_op, ia32_B);
523 set_ia32_ls_mode(new_op, get_irn_mode(val));
524 set_ia32_frame_ent(new_op, ent);
525 set_ia32_use_frame(new_op);
527 proj = new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode, 0);
530 sched_add_after(sched_point, new_op);
531 sched_add_after(new_op, proj);
541 * Calls the transform functions for StackParam, Spill and Reload.
543 static void ia32_after_ra_walker(ir_node *node, void *env) {
544 ia32_code_gen_t *cg = env;
545 ia32_transform_env_t tenv;
550 tenv.block = get_nodes_block(node);
551 tenv.dbg = get_irn_dbg_info(node);
552 tenv.irg = current_ir_graph;
555 tenv.mode = get_irn_mode(node);
558 /* be_is_StackParam(node) || */
559 if (be_is_Reload(node)) {
560 transform_to_Load(&tenv);
562 else if (be_is_Spill(node)) {
563 transform_to_Store(&tenv);
568 * We transform StackParam, Spill and Reload here. This needs to be done before
569 * stack biasing otherwise we would miss the corrected offset for these nodes.
571 static void ia32_after_ra(void *self) {
572 ia32_code_gen_t *cg = self;
573 irg_walk_blkwise_graph(cg->irg, NULL, ia32_after_ra_walker, self);
578 * Emits the code, closes the output file and frees
579 * the code generator interface.
581 static void ia32_codegen(void *self) {
582 ia32_code_gen_t *cg = self;
583 ir_graph *irg = cg->irg;
586 if (cg->emit_decls) {
587 ia32_gen_decls(cg->out);
591 ia32_finish_irg(irg, cg);
592 dump_ir_block_graph_sched(irg, "-finished");
593 ia32_gen_routine(out, irg, cg);
597 pmap_destroy(cg->tv_ent);
598 pmap_destroy(cg->types);
600 /* de-allocate code generator */
601 del_set(cg->reg_set);
605 static void *ia32_cg_init(FILE *F, const be_irg_t *birg);
607 static const arch_code_generator_if_t ia32_code_gen_if = {
609 NULL, /* before abi introduce hook */
611 ia32_before_sched, /* before scheduling hook */
612 ia32_before_ra, /* before register allocation hook */
613 ia32_after_ra, /* after register allocation hook */
614 ia32_codegen /* emit && done */
618 * Initializes the code generator.
620 static void *ia32_cg_init(FILE *F, const be_irg_t *birg) {
621 ia32_isa_t *isa = (ia32_isa_t *)birg->main_env->arch_env->isa;
622 ia32_code_gen_t *cg = xcalloc(1, sizeof(*cg));
624 cg->impl = &ia32_code_gen_if;
626 cg->reg_set = new_set(ia32_cmp_irn_reg_assoc, 1024);
627 cg->mod = firm_dbg_register("firm.be.ia32.cg");
629 cg->arch_env = birg->main_env->arch_env;
630 cg->types = pmap_create();
631 cg->tv_ent = pmap_create();
634 /* set optimizations */
637 cg->opt.placecnst = 1;
641 if (isa->name_obst_size) {
642 //printf("freed %d bytes from name obst\n", isa->name_obst_size);
643 isa->name_obst_size = 0;
644 obstack_free(isa->name_obst, NULL);
645 obstack_init(isa->name_obst);
651 if (isa->num_codegens > 1)
656 cur_reg_set = cg->reg_set;
658 ia32_irn_ops.cg = cg;
660 return (arch_code_generator_t *)cg;
665 /*****************************************************************
666 * ____ _ _ _____ _____
667 * | _ \ | | | | |_ _|/ ____| /\
668 * | |_) | __ _ ___| | _____ _ __ __| | | | | (___ / \
669 * | _ < / _` |/ __| |/ / _ \ '_ \ / _` | | | \___ \ / /\ \
670 * | |_) | (_| | (__| < __/ | | | (_| | _| |_ ____) / ____ \
671 * |____/ \__,_|\___|_|\_\___|_| |_|\__,_| |_____|_____/_/ \_\
673 *****************************************************************/
675 static ia32_isa_t ia32_isa_template = {
676 &ia32_isa_if, /* isa interface implementation */
677 &ia32_gp_regs[REG_ESP], /* stack pointer register */
678 &ia32_gp_regs[REG_EBP], /* base pointer register */
679 -1, /* stack direction */
680 0, /* number of code generator objects so far */
681 NULL /* name obstack */
685 * Initializes the backend ISA.
687 static void *ia32_init(void) {
688 static int inited = 0;
694 isa = xcalloc(1, sizeof(*isa));
695 memcpy(isa, &ia32_isa_template, sizeof(*isa));
697 ia32_register_init(isa);
698 ia32_create_opcodes();
701 isa->name_obst = xcalloc(1, sizeof(*(isa->name_obst)));
702 obstack_init(isa->name_obst);
703 isa->name_obst_size = 0;
714 * Closes the output file and frees the ISA structure.
716 static void ia32_done(void *self) {
717 ia32_isa_t *isa = self;
720 //printf("name obst size = %d bytes\n", isa->name_obst_size);
721 obstack_free(isa->name_obst, NULL);
729 static int ia32_get_n_reg_class(const void *self) {
733 static const arch_register_class_t *ia32_get_reg_class(const void *self, int i) {
734 assert(i >= 0 && i < N_CLASSES && "Invalid ia32 register class requested.");
735 return &ia32_reg_classes[i];
739 * Get the register class which shall be used to store a value of a given mode.
740 * @param self The this pointer.
741 * @param mode The mode in question.
742 * @return A register class which can hold values of the given mode.
744 const arch_register_class_t *ia32_get_reg_class_for_mode(const void *self, const ir_mode *mode) {
745 if (mode_is_float(mode))
746 return &ia32_reg_classes[CLASS_ia32_fp];
748 return &ia32_reg_classes[CLASS_ia32_gp];
752 * Get the ABI restrictions for procedure calls.
753 * @param self The this pointer.
754 * @param method_type The type of the method (procedure) in question.
755 * @param abi The abi object to be modified
757 void ia32_get_call_abi(const void *self, ir_type *method_type, be_abi_call_t *abi) {
760 unsigned cc = get_method_calling_convention(method_type);
761 int n = get_method_n_params(method_type);
766 const arch_register_t *reg;
767 be_abi_call_flags_t call_flags;
769 /* set abi flags for calls */
770 call_flags.bits.left_to_right = 0;
771 call_flags.bits.store_args_sequential = 0;
772 call_flags.bits.try_omit_fp = 1;
773 call_flags.bits.fp_free = 0;
774 call_flags.bits.call_has_imm = 1;
776 /* set stack parameter passing style */
777 be_abi_call_set_flags(abi, call_flags, &ia32_abi_callbacks);
779 /* collect the mode for each type */
780 modes = alloca(n * sizeof(modes[0]));
782 for (i = 0; i < n; i++) {
783 tp = get_method_param_type(method_type, i);
784 modes[i] = get_type_mode(tp);
787 /* set register parameters */
788 if (cc & cc_reg_param) {
789 /* determine the number of parameters passed via registers */
790 biggest_n = ia32_get_n_regparam_class(n, modes, &ignore, &ignore);
792 /* loop over all parameters and set the register requirements */
793 for (i = 0; i <= biggest_n; i++) {
794 reg = ia32_get_RegParam_reg(n, modes, i, cc);
795 assert(reg && "kaputt");
796 be_abi_call_param_reg(abi, i, reg);
803 /* set stack parameters */
804 for (i = stack_idx; i < n; i++) {
805 be_abi_call_param_stack(abi, i);
809 /* set return registers */
810 n = get_method_n_ress(method_type);
812 assert(n <= 2 && "more than two results not supported");
814 /* In case of 64bit returns, we will have two 32bit values */
816 tp = get_method_res_type(method_type, 0);
817 mode = get_type_mode(tp);
819 assert(!mode_is_float(mode) && "two FP results not supported");
821 tp = get_method_res_type(method_type, 1);
822 mode = get_type_mode(tp);
824 assert(!mode_is_float(mode) && "two FP results not supported");
826 be_abi_call_res_reg(abi, 0, &ia32_gp_regs[REG_EAX]);
827 be_abi_call_res_reg(abi, 1, &ia32_gp_regs[REG_EDX]);
830 tp = get_method_res_type(method_type, 0);
831 assert(is_atomic_type(tp));
832 mode = get_type_mode(tp);
834 be_abi_call_res_reg(abi, 0, mode_is_float(mode) ? &ia32_fp_regs[REG_XMM0] : &ia32_gp_regs[REG_EAX]);
839 static const void *ia32_get_irn_ops(const arch_irn_handler_t *self, const ir_node *irn) {
840 return &ia32_irn_ops;
843 const arch_irn_handler_t ia32_irn_handler = {
847 const arch_irn_handler_t *ia32_get_irn_handler(const void *self) {
848 return &ia32_irn_handler;
851 int ia32_to_appear_in_schedule(void *block_env, const ir_node *irn) {
852 return is_ia32_irn(irn);
856 * Initializes the code generator interface.
858 static const arch_code_generator_if_t *ia32_get_code_generator_if(void *self) {
859 return &ia32_code_gen_if;
862 list_sched_selector_t ia32_sched_selector;
865 * Returns the reg_pressure scheduler with to_appear_in_schedule() overloaded
867 static const list_sched_selector_t *ia32_get_list_sched_selector(const void *self) {
868 memcpy(&ia32_sched_selector, trivial_selector, sizeof(list_sched_selector_t));
869 ia32_sched_selector.to_appear_in_schedule = ia32_to_appear_in_schedule;
870 return &ia32_sched_selector;
874 static void ia32_register_options(lc_opt_entry_t *ent)
877 #endif /* WITH_LIBCORE */
879 const arch_isa_if_t ia32_isa_if = {
881 ia32_register_options,
885 ia32_get_n_reg_class,
887 ia32_get_reg_class_for_mode,
889 ia32_get_irn_handler,
890 ia32_get_code_generator_if,
891 ia32_get_list_sched_selector