11 #include "pseudo_irg.h"
15 #include "iredges_t.h"
22 #include "../beabi.h" /* the general register allocator interface */
23 #include "../benode_t.h"
24 #include "../belower.h"
25 #include "../besched_t.h"
27 #include "bearch_ia32_t.h"
29 #include "ia32_new_nodes.h" /* ia32 nodes interface */
30 #include "gen_ia32_regalloc_if.h" /* the generated interface (register type and class defenitions) */
31 #include "ia32_gen_decls.h" /* interface declaration emitter */
32 #include "ia32_transform.h"
33 #include "ia32_emitter.h"
34 #include "ia32_map_regs.h"
35 #include "ia32_optimize.h"
37 #define DEBUG_MODULE "firm.be.ia32.isa"
40 static set *cur_reg_set = NULL;
43 #define is_Start(irn) (get_irn_opcode(irn) == iro_Start)
45 ir_node *ia32_new_NoReg_gp(ia32_code_gen_t *cg) {
46 return be_abi_get_callee_save_irn(cg->birg->abi, &ia32_gp_regs[REG_XXX]);
49 ir_node *ia32_new_NoReg_fp(ia32_code_gen_t *cg) {
50 return be_abi_get_callee_save_irn(cg->birg->abi, &ia32_fp_regs[REG_XXXX]);
53 /**************************************************
56 * _ __ ___ __ _ __ _| | | ___ ___ _| |_
57 * | '__/ _ \/ _` | / _` | | |/ _ \ / __| | | _|
58 * | | | __/ (_| | | (_| | | | (_) | (__ | | |
59 * |_| \___|\__, | \__,_|_|_|\___/ \___| |_|_|
62 **************************************************/
64 static ir_node *my_skip_proj(const ir_node *n) {
71 * Return register requirements for an ia32 node.
72 * If the node returns a tuple (mode_T) then the proj's
73 * will be asked for this information.
75 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) {
76 const ia32_register_req_t *irn_req;
77 long node_pos = pos == -1 ? 0 : pos;
78 ir_mode *mode = get_irn_mode(irn);
79 firm_dbg_module_t *mod = firm_dbg_register(DEBUG_MODULE);
80 const ia32_irn_ops_t *ops = self;
82 if (mode == mode_T || mode == mode_M) {
83 DBG((mod, LEVEL_1, "ignoring mode_T, mode_M node %+F\n", irn));
87 DBG((mod, LEVEL_1, "get requirements at pos %d for %+F ... ", pos, irn));
92 node_pos = ia32_translate_proj_pos(irn);
98 irn = my_skip_proj(irn);
100 DB((mod, LEVEL_1, "skipping Proj, going to %+F at pos %d ... ", irn, node_pos));
103 if (is_ia32_irn(irn)) {
105 irn_req = get_ia32_in_req(irn, pos);
108 irn_req = get_ia32_out_req(irn, node_pos);
111 DB((mod, LEVEL_1, "returning reqs for %+F at pos %d\n", irn, pos));
113 memcpy(req, &(irn_req->req), sizeof(*req));
115 if (arch_register_req_is(&(irn_req->req), should_be_same)) {
116 assert(irn_req->same_pos >= 0 && "should be same constraint for in -> out NYI");
117 req->other_same = get_irn_n(irn, irn_req->same_pos);
120 if (arch_register_req_is(&(irn_req->req), should_be_different)) {
121 assert(irn_req->different_pos >= 0 && "should be different constraint for in -> out NYI");
122 req->other_different = get_irn_n(irn, irn_req->different_pos);
126 /* treat Phi like Const with default requirements */
128 DB((mod, LEVEL_1, "returning standard reqs for %+F\n", irn));
129 if (mode_is_float(mode))
130 memcpy(req, &(ia32_default_req_ia32_fp.req), sizeof(*req));
131 else if (mode_is_int(mode) || mode_is_reference(mode))
132 memcpy(req, &(ia32_default_req_ia32_gp.req), sizeof(*req));
133 else if (mode == mode_T || mode == mode_M) {
134 DBG((mod, LEVEL_1, "ignoring Phi node %+F\n", irn));
138 assert(0 && "unsupported Phi-Mode");
141 DB((mod, LEVEL_1, "returning NULL for %+F (not ia32)\n", irn));
149 static void ia32_set_irn_reg(const void *self, ir_node *irn, const arch_register_t *reg) {
153 pos = ia32_translate_proj_pos(irn);
154 irn = my_skip_proj(irn);
157 if (is_ia32_irn(irn)) {
158 const arch_register_t **slots;
160 slots = get_ia32_slots(irn);
164 ia32_set_firm_reg(irn, reg, cur_reg_set);
168 static const arch_register_t *ia32_get_irn_reg(const void *self, const ir_node *irn) {
170 const arch_register_t *reg = NULL;
173 pos = ia32_translate_proj_pos(irn);
174 irn = my_skip_proj(irn);
177 if (is_ia32_irn(irn)) {
178 const arch_register_t **slots;
179 slots = get_ia32_slots(irn);
183 reg = ia32_get_firm_reg(irn, cur_reg_set);
189 static arch_irn_class_t ia32_classify(const void *self, const ir_node *irn) {
190 irn = my_skip_proj(irn);
192 return arch_irn_class_branch;
193 else if (is_ia32_irn(irn))
194 return arch_irn_class_normal;
199 static arch_irn_flags_t ia32_get_flags(const void *self, const ir_node *irn) {
200 irn = my_skip_proj(irn);
201 if (is_ia32_irn(irn))
202 return get_ia32_flags(irn);
208 static entity *ia32_get_frame_entity(const void *self, const ir_node *irn) {
209 return is_ia32_irn(irn) ? get_ia32_frame_ent(irn) : NULL;
212 static void ia32_set_stack_bias(const void *self, ir_node *irn, int bias) {
214 const ia32_irn_ops_t *ops = self;
216 if (is_ia32_use_frame(irn)) {
217 ia32_am_flavour_t am_flav = get_ia32_am_flavour(irn);
219 DBG((ops->cg->mod, LEVEL_1, "stack biased %+F with %d\n", irn, bias));
220 snprintf(buf, sizeof(buf), "%d", bias);
221 add_ia32_am_offs(irn, buf);
223 set_ia32_am_flavour(irn, am_flav);
227 /* fill register allocator interface */
229 static const arch_irn_ops_if_t ia32_irn_ops_if = {
230 ia32_get_irn_reg_req,
235 ia32_get_frame_entity,
239 ia32_irn_ops_t ia32_irn_ops = {
246 /**************************************************
249 * ___ ___ __| | ___ __ _ ___ _ __ _| |_
250 * / __/ _ \ / _` |/ _ \/ _` |/ _ \ '_ \ | | _|
251 * | (_| (_) | (_| | __/ (_| | __/ | | | | | |
252 * \___\___/ \__,_|\___|\__, |\___|_| |_| |_|_|
255 **************************************************/
258 * Transforms the standard firm graph into
261 static void ia32_prepare_graph(void *self) {
262 ia32_code_gen_t *cg = self;
264 irg_walk_blkwise_graph(cg->irg, ia32_place_consts, ia32_transform_node, cg);
265 dump_ir_block_graph_sched(cg->irg, "-transformed");
266 edges_deactivate(cg->irg);
267 edges_activate(cg->irg);
268 irg_walk_blkwise_graph(cg->irg, NULL, ia32_optimize_am, cg);
269 dump_ir_block_graph_sched(cg->irg, "-am");
274 * Insert copies for all ia32 nodes where the should_be_same requirement
277 static void ia32_finish_irg_walker(ir_node *irn, void *env) {
278 ia32_code_gen_t *cg = env;
279 const ia32_register_req_t **reqs;
280 const arch_register_t *out_reg, *in_reg;
282 ir_node *copy, *in_node, *block;
284 if (! is_ia32_irn(irn))
287 /* nodes with destination address mode don't produce values */
288 if (get_ia32_op_type(irn) == ia32_AddrModeD)
291 reqs = get_ia32_out_req_all(irn);
292 n_res = get_ia32_n_res(irn);
293 block = get_nodes_block(irn);
295 /* check all OUT requirements, if there is a should_be_same */
296 for (i = 0; i < n_res; i++) {
297 if (arch_register_req_is(&(reqs[i]->req), should_be_same)) {
298 /* get in and out register */
299 out_reg = get_ia32_out_reg(irn, i);
300 in_node = get_irn_n(irn, reqs[i]->same_pos);
301 in_reg = arch_get_irn_register(cg->arch_env, in_node);
303 /* check if in and out register are equal */
304 if (arch_register_get_index(out_reg) != arch_register_get_index(in_reg)) {
305 DBG((cg->mod, LEVEL_1, "inserting copy for %+F in_pos %d\n", irn, reqs[i]->same_pos));
307 /* create copy from in register */
308 copy = be_new_Copy(arch_register_get_class(in_reg), cg->irg, block, in_node);
310 /* destination is the out register */
311 arch_set_irn_register(cg->arch_env, copy, out_reg);
313 /* insert copy before the node into the schedule */
314 sched_add_before(irn, copy);
317 set_irn_n(irn, reqs[i]->same_pos, copy);
324 * Add Copy nodes for not fulfilled should_be_equal constraints
326 static void ia32_finish_irg(ir_graph *irg, ia32_code_gen_t *cg) {
327 irg_walk_blkwise_graph(irg, NULL, ia32_finish_irg_walker, cg);
333 * Dummy functions for hooks we don't need but which must be filled.
335 static void ia32_before_sched(void *self) {
338 static void ia32_before_ra(void *self) {
344 * Transforms a be node into a Load.
346 static void transform_to_Load(ia32_transform_env_t *env) {
347 ir_node *irn = env->irn;
348 entity *ent = be_get_frame_entity(irn);
349 ir_mode *mode = env->mode;
350 ir_node *noreg = ia32_new_NoReg_gp(env->cg);
351 ir_node *nomem = new_rd_NoMem(env->irg);
352 ir_node *sched_point = NULL;
353 ir_node *ptr = get_irn_n(irn, 0);
354 ir_node *mem = be_is_Reload(irn) ? get_irn_n(irn, 1) : nomem;
355 ir_node *new_op, *proj;
356 const arch_register_t *reg;
358 if (sched_is_scheduled(irn)) {
359 sched_point = sched_prev(irn);
362 if (mode_is_float(mode)) {
363 new_op = new_rd_ia32_fLoad(env->dbg, env->irg, env->block, ptr, noreg, mem, mode_T);
366 new_op = new_rd_ia32_Load(env->dbg, env->irg, env->block, ptr, noreg, mem, mode_T);
369 set_ia32_am_support(new_op, ia32_am_Source);
370 set_ia32_op_type(new_op, ia32_AddrModeS);
371 set_ia32_am_flavour(new_op, ia32_B);
372 set_ia32_ls_mode(new_op, mode);
373 set_ia32_frame_ent(new_op, ent);
374 set_ia32_use_frame(new_op);
376 proj = new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode, pn_Load_res);
379 sched_add_after(sched_point, new_op);
380 sched_add_after(new_op, proj);
385 /* copy the register from the old node to the new Load */
386 reg = arch_get_irn_register(env->cg->arch_env, irn);
387 arch_set_irn_register(env->cg->arch_env, new_op, reg);
394 * Transforms a be node into a Store.
396 static void transform_to_Store(ia32_transform_env_t *env) {
397 ir_node *irn = env->irn;
398 entity *ent = be_get_frame_entity(irn);
399 ir_mode *mode = env->mode;
400 ir_node *noreg = ia32_new_NoReg_gp(env->cg);
401 ir_node *nomem = new_rd_NoMem(env->irg);
402 ir_node *ptr = get_irn_n(irn, 0);
403 ir_node *val = get_irn_n(irn, 1);
404 ir_node *new_op, *proj;
405 ir_node *sched_point = NULL;
407 if (sched_is_scheduled(irn)) {
408 sched_point = sched_prev(irn);
411 if (mode_is_float(mode)) {
412 new_op = new_rd_ia32_fStore(env->dbg, env->irg, env->block, ptr, noreg, val, nomem, mode_T);
415 new_op = new_rd_ia32_Store(env->dbg, env->irg, env->block, ptr, noreg, val, nomem, mode_T);
418 set_ia32_am_support(new_op, ia32_am_Dest);
419 set_ia32_op_type(new_op, ia32_AddrModeD);
420 set_ia32_am_flavour(new_op, ia32_B);
421 set_ia32_ls_mode(new_op, get_irn_mode(val));
422 set_ia32_frame_ent(new_op, ent);
423 set_ia32_use_frame(new_op);
425 proj = new_rd_Proj(env->dbg, env->irg, env->block, new_op, mode, 0);
428 sched_add_after(sched_point, new_op);
429 sched_add_after(new_op, proj);
439 * Calls the transform functions for StackParam, Spill and Reload.
441 static void ia32_after_ra_walker(ir_node *node, void *env) {
442 ia32_code_gen_t *cg = env;
443 ir_node *new_node = NULL;
444 ia32_transform_env_t tenv;
449 tenv.block = get_nodes_block(node);
450 tenv.dbg = get_irn_dbg_info(node);
451 tenv.irg = current_ir_graph;
454 tenv.mode = get_irn_mode(node);
457 if (be_is_StackParam(node) || be_is_Reload(node)) {
458 transform_to_Load(&tenv);
460 else if (be_is_Spill(node)) {
461 transform_to_Store(&tenv);
466 * We transform StackParam, Spill and Reload here. This needs to be done before
467 * stack biasing otherwise we would miss the corrected offset for these nodes.
469 static void ia32_after_ra(void *self) {
470 ia32_code_gen_t *cg = self;
471 irg_walk_blkwise_graph(cg->irg, NULL, ia32_after_ra_walker, self);
476 * Emits the code, closes the output file and frees
477 * the code generator interface.
479 static void ia32_codegen(void *self) {
480 ia32_code_gen_t *cg = self;
481 ir_graph *irg = cg->irg;
484 if (cg->emit_decls) {
485 ia32_gen_decls(cg->out);
489 ia32_finish_irg(irg, cg);
490 dump_ir_block_graph_sched(irg, "-finished");
491 ia32_gen_routine(out, irg, cg);
495 pmap_destroy(cg->tv_ent);
496 pmap_destroy(cg->types);
498 /* de-allocate code generator */
499 del_set(cg->reg_set);
503 static void *ia32_cg_init(FILE *F, const be_irg_t *birg);
505 static const arch_code_generator_if_t ia32_code_gen_if = {
508 ia32_before_sched, /* before scheduling hook */
509 ia32_before_ra, /* before register allocation hook */
510 ia32_after_ra, /* after register allocation hook */
511 ia32_codegen /* emit && done */
515 * Initializes the code generator.
517 static void *ia32_cg_init(FILE *F, const be_irg_t *birg) {
518 ia32_isa_t *isa = (ia32_isa_t *)birg->main_env->arch_env->isa;
519 ia32_code_gen_t *cg = xcalloc(1, sizeof(*cg));
521 cg->impl = &ia32_code_gen_if;
523 cg->reg_set = new_set(ia32_cmp_irn_reg_assoc, 1024);
524 cg->mod = firm_dbg_register("firm.be.ia32.cg");
526 cg->arch_env = birg->main_env->arch_env;
527 cg->types = pmap_create();
528 cg->tv_ent = pmap_create();
533 if (isa->num_codegens > 1)
538 cur_reg_set = cg->reg_set;
540 ia32_irn_ops.cg = cg;
542 return (arch_code_generator_t *)cg;
547 /*****************************************************************
548 * ____ _ _ _____ _____
549 * | _ \ | | | | |_ _|/ ____| /\
550 * | |_) | __ _ ___| | _____ _ __ __| | | | | (___ / \
551 * | _ < / _` |/ __| |/ / _ \ '_ \ / _` | | | \___ \ / /\ \
552 * | |_) | (_| | (__| < __/ | | | (_| | _| |_ ____) / ____ \
553 * |____/ \__,_|\___|_|\_\___|_| |_|\__,_| |_____|_____/_/ \_\
555 *****************************************************************/
557 static ia32_isa_t ia32_isa_template = {
559 &ia32_gp_regs[REG_ESP],
560 &ia32_gp_regs[REG_EBP],
566 * Initializes the backend ISA.
568 static void *ia32_init(void) {
569 static int inited = 0;
575 isa = xcalloc(1, sizeof(*isa));
576 memcpy(isa, &ia32_isa_template, sizeof(*isa));
578 ia32_register_init(isa);
579 ia32_create_opcodes();
589 * Closes the output file and frees the ISA structure.
591 static void ia32_done(void *self) {
597 static int ia32_get_n_reg_class(const void *self) {
601 static const arch_register_class_t *ia32_get_reg_class(const void *self, int i) {
602 assert(i >= 0 && i < N_CLASSES && "Invalid ia32 register class requested.");
603 return &ia32_reg_classes[i];
607 * Get the register class which shall be used to store a value of a given mode.
608 * @param self The this pointer.
609 * @param mode The mode in question.
610 * @return A register class which can hold values of the given mode.
612 const arch_register_class_t *ia32_get_reg_class_for_mode(const void *self, const ir_mode *mode) {
613 if (mode_is_float(mode))
614 return &ia32_reg_classes[CLASS_ia32_fp];
616 return &ia32_reg_classes[CLASS_ia32_gp];
620 * Produces the type which sits between the stack args and the locals on the stack.
621 * it will contain the return address and space to store the old base pointer.
622 * @return The Firm type modelling the ABI between type.
624 static ir_type *get_between_type(void)
626 static ir_type *between_type = NULL;
627 static entity *old_bp_ent = NULL;
630 entity *ret_addr_ent;
631 ir_type *ret_addr_type = new_type_primitive(new_id_from_str("return_addr"), mode_P);
632 ir_type *old_bp_type = new_type_primitive(new_id_from_str("bp"), mode_P);
634 between_type = new_type_class(new_id_from_str("ia32_between_type"));
635 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
636 ret_addr_ent = new_entity(between_type, new_id_from_str("ret_addr"), ret_addr_type);
638 set_entity_offset_bytes(old_bp_ent, 0);
639 set_entity_offset_bytes(ret_addr_ent, get_type_size_bytes(old_bp_type));
640 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
647 * Get the ABI restrictions for procedure calls.
648 * @param self The this pointer.
649 * @param method_type The type of the method (procedure) in question.
650 * @param abi The abi object to be modified
652 void ia32_get_call_abi(const void *self, ir_type *method_type, be_abi_call_t *abi) {
653 ir_type *between_type;
656 unsigned cc = get_method_calling_convention(method_type);
657 int n = get_method_n_params(method_type);
662 const arch_register_t *reg;
663 be_abi_call_flags_t call_flags = { 0, 0, 0, 0, 1 };
665 /* get the between type and the frame pointer save entity */
666 between_type = get_between_type();
668 /* set stack parameter passing style */
669 be_abi_call_set_flags(abi, call_flags, between_type);
671 /* collect the mode for each type */
672 modes = alloca(n * sizeof(modes[0]));
674 for (i = 0; i < n; i++) {
675 tp = get_method_param_type(method_type, i);
676 modes[i] = get_type_mode(tp);
679 /* set register parameters */
680 if (cc & cc_reg_param) {
681 /* determine the number of parameters passed via registers */
682 biggest_n = ia32_get_n_regparam_class(n, modes, &ignore, &ignore);
684 /* loop over all parameters and set the register requirements */
685 for (i = 0; i <= biggest_n; i++) {
686 reg = ia32_get_RegParam_reg(n, modes, i, cc);
687 assert(reg && "kaputt");
688 be_abi_call_param_reg(abi, i, reg);
695 /* set stack parameters */
696 for (i = stack_idx; i < n; i++) {
697 be_abi_call_param_stack(abi, i);
701 /* set return registers */
702 n = get_method_n_ress(method_type);
704 assert(n <= 2 && "more than two results not supported");
706 /* In case of 64bit returns, we will have two 32bit values */
708 tp = get_method_res_type(method_type, 0);
709 mode = get_type_mode(tp);
711 assert(!mode_is_float(mode) && "two FP results not supported");
713 tp = get_method_res_type(method_type, 1);
714 mode = get_type_mode(tp);
716 assert(!mode_is_float(mode) && "two FP results not supported");
718 be_abi_call_res_reg(abi, 0, &ia32_gp_regs[REG_EAX]);
719 be_abi_call_res_reg(abi, 1, &ia32_gp_regs[REG_EDX]);
722 tp = get_method_res_type(method_type, 0);
723 assert(is_atomic_type(tp));
724 mode = get_type_mode(tp);
726 be_abi_call_res_reg(abi, 0, mode_is_float(mode) ? &ia32_fp_regs[REG_XMM0] : &ia32_gp_regs[REG_EAX]);
731 static const void *ia32_get_irn_ops(const arch_irn_handler_t *self, const ir_node *irn) {
732 return &ia32_irn_ops;
735 const arch_irn_handler_t ia32_irn_handler = {
739 const arch_irn_handler_t *ia32_get_irn_handler(const void *self) {
740 return &ia32_irn_handler;
743 int ia32_to_appear_in_schedule(void *block_env, const ir_node *irn) {
744 return is_ia32_irn(irn);
748 * Initializes the code generator interface.
750 static const arch_code_generator_if_t *ia32_get_code_generator_if(void *self) {
751 return &ia32_code_gen_if;
754 list_sched_selector_t ia32_sched_selector;
757 * Returns the reg_pressure scheduler with to_appear_in_schedule() overloaded
759 static const list_sched_selector_t *ia32_get_list_sched_selector(const void *self) {
760 memcpy(&ia32_sched_selector, trivial_selector, sizeof(list_sched_selector_t));
761 ia32_sched_selector.to_appear_in_schedule = ia32_to_appear_in_schedule;
762 return &ia32_sched_selector;
766 static void ia32_register_options(lc_opt_entry_t *ent)
769 #endif /* WITH_LIBCORE */
771 const arch_isa_if_t ia32_isa_if = {
773 ia32_register_options,
777 ia32_get_n_reg_class,
779 ia32_get_reg_class_for_mode,
781 ia32_get_irn_handler,
782 ia32_get_code_generator_if,
783 ia32_get_list_sched_selector