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
22 * @brief The main TEMPLATE backend driver file.
27 #include "pseudo_irg.h"
38 #include "../bearch.h"
39 #include "../benode_t.h"
40 #include "../belower.h"
41 #include "../besched.h"
43 #include "../bemodule.h"
44 #include "../begnuas.h"
45 #include "../belistsched.h"
47 #include "bearch_TEMPLATE_t.h"
49 #include "TEMPLATE_new_nodes.h"
50 #include "gen_TEMPLATE_regalloc_if.h"
51 #include "TEMPLATE_transform.h"
52 #include "TEMPLATE_emitter.h"
53 #include "TEMPLATE_map_regs.h"
55 /* TODO: ugly, but we need it to get access to the registers assigned to Phi nodes */
56 static set *cur_reg_set = NULL;
58 /**************************************************
61 * _ __ ___ __ _ __ _| | | ___ ___ _| |_
62 * | '__/ _ \/ _` | / _` | | |/ _ \ / __| | | _|
63 * | | | __/ (_| | | (_| | | | (_) | (__ | | |
64 * |_| \___|\__, | \__,_|_|_|\___/ \___| |_|_|
67 **************************************************/
70 * Return register requirements for a TEMPLATE node.
71 * If the node returns a tuple (mode_T) then the proj's
72 * will be asked for this information.
74 static const arch_register_req_t *TEMPLATE_get_irn_reg_req(const ir_node *node,
77 long node_pos = pos == -1 ? 0 : pos;
78 ir_mode *mode = get_irn_mode(node);
80 if (mode == mode_T || mode == mode_M) {
81 return arch_no_register_req;
85 /* in case of a proj, we need to get the correct OUT slot */
86 /* of the node corresponding to the proj number */
88 node_pos = TEMPLATE_translate_proj_pos(node);
93 node = skip_Proj_const(node);
96 /* get requirements for our own nodes */
97 if (is_TEMPLATE_irn(node)) {
98 const arch_register_req_t *req;
100 req = get_TEMPLATE_in_req(node, pos);
102 req = get_TEMPLATE_out_req(node, node_pos);
110 /* unknowns should be transformed already */
111 assert(!is_Unknown(node));
113 return arch_no_register_req;
116 static arch_irn_class_t TEMPLATE_classify(const ir_node *irn)
118 irn = skip_Proj_const(irn);
121 return arch_irn_class_branch;
127 static ir_entity *TEMPLATE_get_frame_entity(const ir_node *node)
130 /* TODO: return the ir_entity assigned to the frame */
134 static void TEMPLATE_set_frame_entity(ir_node *node, ir_entity *ent)
138 /* TODO: set the ir_entity assigned to the frame */
142 * This function is called by the generic backend to correct offsets for
143 * nodes accessing the stack.
145 static void TEMPLATE_set_frame_offset(ir_node *irn, int offset)
149 /* TODO: correct offset if irn accesses the stack */
152 static int TEMPLATE_get_sp_bias(const ir_node *irn)
158 /* fill register allocator interface */
160 static const arch_irn_ops_t TEMPLATE_irn_ops = {
161 TEMPLATE_get_irn_reg_req,
163 TEMPLATE_get_frame_entity,
164 TEMPLATE_set_frame_entity,
165 TEMPLATE_set_frame_offset,
166 TEMPLATE_get_sp_bias,
167 NULL, /* get_inverse */
168 NULL, /* get_op_estimated_cost */
169 NULL, /* possible_memory_operand */
170 NULL, /* perform_memory_operand */
173 /**************************************************
176 * ___ ___ __| | ___ __ _ ___ _ __ _| |_
177 * / __/ _ \ / _` |/ _ \/ _` |/ _ \ '_ \ | | _|
178 * | (_| (_) | (_| | __/ (_| | __/ | | | | | |
179 * \___\___/ \__,_|\___|\__, |\___|_| |_| |_|_|
182 **************************************************/
185 * Transforms the standard firm graph into
186 * a TEMLPATE firm graph
188 static void TEMPLATE_prepare_graph(void *self) {
189 TEMPLATE_code_gen_t *cg = self;
191 irg_walk_blkwise_graph(cg->irg, NULL, TEMPLATE_transform_node, cg);
197 * Called immediatly before emit phase.
199 static void TEMPLATE_finish_irg(void *self) {
200 TEMPLATE_code_gen_t *cg = self;
201 ir_graph *irg = cg->irg;
203 dump_ir_block_graph_sched(irg, "-TEMPLATE-finished");
207 static void TEMPLATE_before_ra(void *self) {
209 /* Some stuff you need to do after scheduling but before register allocation */
212 static void TEMPLATE_after_ra(void *self) {
214 /* Some stuff you need to do immediatly after register allocation */
220 * Emits the code, closes the output file and frees
221 * the code generator interface.
223 static void TEMPLATE_emit_and_done(void *self) {
224 TEMPLATE_code_gen_t *cg = self;
225 ir_graph *irg = cg->irg;
227 TEMPLATE_gen_routine(cg, irg);
231 /* de-allocate code generator */
232 del_set(cg->reg_set);
236 static void *TEMPLATE_cg_init(be_irg_t *birg);
238 static const arch_code_generator_if_t TEMPLATE_code_gen_if = {
240 NULL, /* get_pic_base hook */
241 NULL, /* before abi introduce hook */
242 TEMPLATE_prepare_graph,
243 NULL, /* spill hook */
244 TEMPLATE_before_ra, /* before register allocation hook */
245 TEMPLATE_after_ra, /* after register allocation hook */
247 TEMPLATE_emit_and_done
251 * Initializes the code generator.
253 static void *TEMPLATE_cg_init(be_irg_t *birg) {
254 const arch_env_t *arch_env = be_get_birg_arch_env(birg);
255 TEMPLATE_isa_t *isa = (TEMPLATE_isa_t *) arch_env;
256 TEMPLATE_code_gen_t *cg = XMALLOC(TEMPLATE_code_gen_t);
258 cg->impl = &TEMPLATE_code_gen_if;
259 cg->irg = be_get_birg_irg(birg);
260 cg->reg_set = new_set(TEMPLATE_cmp_irn_reg_assoc, 1024);
263 FIRM_DBG_REGISTER(cg->mod, "firm.be.TEMPLATE.cg");
265 cur_reg_set = cg->reg_set;
267 return (arch_code_generator_t *)cg;
272 /*****************************************************************
273 * ____ _ _ _____ _____
274 * | _ \ | | | | |_ _|/ ____| /\
275 * | |_) | __ _ ___| | _____ _ __ __| | | | | (___ / \
276 * | _ < / _` |/ __| |/ / _ \ '_ \ / _` | | | \___ \ / /\ \
277 * | |_) | (_| | (__| < __/ | | | (_| | _| |_ ____) / ____ \
278 * |____/ \__,_|\___|_|\_\___|_| |_|\__,_| |_____|_____/_/ \_\
280 *****************************************************************/
282 static TEMPLATE_isa_t TEMPLATE_isa_template = {
284 &TEMPLATE_isa_if, /* isa interface implementation */
285 &TEMPLATE_general_purpose_regs[REG_SP], /* stack pointer register */
286 &TEMPLATE_general_purpose_regs[REG_BP], /* base pointer register */
287 &TEMPLATE_reg_classes[CLASS_TEMPLATE_general_purpose], /* link pointer register class */
288 -1, /* stack direction */
289 2, /* power of two stack alignment for calls, 2^2 == 4 */
290 NULL, /* main environment */
291 7, /* costs for a spill instruction */
292 5, /* costs for a reload instruction */
297 * Initializes the backend ISA and opens the output file.
299 static arch_env_t *TEMPLATE_init(FILE *outfile) {
300 static int run_once = 0;
307 isa = XMALLOC(TEMPLATE_isa_t);
308 memcpy(isa, &TEMPLATE_isa_template, sizeof(*isa));
310 be_emit_init(outfile);
312 TEMPLATE_register_init();
313 TEMPLATE_create_opcodes(&TEMPLATE_irn_ops);
315 return &isa->arch_env;
321 * Closes the output file and frees the ISA structure.
323 static void TEMPLATE_done(void *self) {
324 TEMPLATE_isa_t *isa = self;
326 /* emit now all global declarations */
327 be_gas_emit_decls(isa->arch_env.main_env, 0);
335 static unsigned TEMPLATE_get_n_reg_class(const void *self)
341 static const arch_register_class_t *TEMPLATE_get_reg_class(const void *self,
345 assert(i < N_CLASSES);
346 return &TEMPLATE_reg_classes[i];
352 * Get the register class which shall be used to store a value of a given mode.
353 * @param self The this pointer.
354 * @param mode The mode in question.
355 * @return A register class which can hold values of the given mode.
357 const arch_register_class_t *TEMPLATE_get_reg_class_for_mode(const void *self,
361 if (mode_is_float(mode))
362 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_floating_point];
364 return &TEMPLATE_reg_classes[CLASS_TEMPLATE_general_purpose];
370 be_abi_call_flags_bits_t flags;
371 const arch_env_t *arch_env;
373 } TEMPLATE_abi_env_t;
375 static void *TEMPLATE_abi_init(const be_abi_call_t *call, const arch_env_t *arch_env, ir_graph *irg)
377 TEMPLATE_abi_env_t *env = XMALLOC(TEMPLATE_abi_env_t);
378 be_abi_call_flags_t fl = be_abi_call_get_flags(call);
379 env->flags = fl.bits;
381 env->arch_env = arch_env;
386 * Get the between type for that call.
387 * @param self The callback object.
388 * @return The between type of for that call.
390 static ir_type *TEMPLATE_get_between_type(void *self)
392 static ir_type *between_type = NULL;
393 static ir_entity *old_bp_ent = NULL;
397 ir_entity *ret_addr_ent;
398 ir_type *ret_addr_type = new_type_primitive(new_id_from_str("return_addr"), mode_P);
399 ir_type *old_bp_type = new_type_primitive(new_id_from_str("bp"), mode_P);
401 between_type = new_type_class(new_id_from_str("TEMPLATE_between_type"));
402 old_bp_ent = new_entity(between_type, new_id_from_str("old_bp"), old_bp_type);
403 ret_addr_ent = new_entity(between_type, new_id_from_str("old_bp"), ret_addr_type);
405 set_entity_offset(old_bp_ent, 0);
406 set_entity_offset(ret_addr_ent, get_type_size_bytes(old_bp_type));
407 set_type_size_bytes(between_type, get_type_size_bytes(old_bp_type) + get_type_size_bytes(ret_addr_type));
414 * Build the prolog, return the BASE POINTER register
416 static const arch_register_t *TEMPLATE_abi_prologue(void *self, ir_node **mem,
417 pmap *reg_map, int *stack_bias)
419 TEMPLATE_abi_env_t *env = self;
424 if(env->flags.try_omit_fp)
425 return env->arch_env->sp;
426 return env->arch_env->bp;
429 /* Build the epilog */
430 static void TEMPLATE_abi_epilogue(void *self, ir_node *bl, ir_node **mem,
439 static const be_abi_callbacks_t TEMPLATE_abi_callbacks = {
442 TEMPLATE_get_between_type,
443 TEMPLATE_abi_prologue,
444 TEMPLATE_abi_epilogue,
448 * Get the ABI restrictions for procedure calls.
449 * @param self The this pointer.
450 * @param method_type The type of the method (procedure) in question.
451 * @param abi The abi object to be modified
453 void TEMPLATE_get_call_abi(const void *self, ir_type *method_type,
458 int i, n = get_method_n_params(method_type);
459 be_abi_call_flags_t call_flags;
462 /* set abi flags for calls */
463 call_flags.bits.left_to_right = 0;
464 call_flags.bits.store_args_sequential = 1;
465 call_flags.bits.try_omit_fp = 1;
466 call_flags.bits.fp_free = 0;
467 call_flags.bits.call_has_imm = 1;
469 /* set stack parameter passing style */
470 be_abi_call_set_flags(abi, call_flags, &TEMPLATE_abi_callbacks);
472 for (i = 0; i < n; i++) {
473 /* TODO: implement register parameter: */
474 /* reg = get reg for param i; */
475 /* be_abi_call_param_reg(abi, i, reg); */
477 /* default: all parameters on stack */
478 tp = get_method_param_type(method_type, i);
479 mode = get_type_mode(tp);
480 be_abi_call_param_stack(abi, i, mode, 4, 0, 0);
483 /* TODO: set correct return register */
484 /* default: return value is in R0 resp. F0 */
485 if (get_method_n_ress(method_type) > 0) {
486 tp = get_method_res_type(method_type, 0);
487 mode = get_type_mode(tp);
489 be_abi_call_res_reg(abi, 0,
490 mode_is_float(mode) ? &TEMPLATE_floating_point_regs[REG_F0] : &TEMPLATE_general_purpose_regs[REG_R0]);
494 int TEMPLATE_to_appear_in_schedule(void *block_env, const ir_node *irn)
498 if(!is_TEMPLATE_irn(irn))
505 * Initializes the code generator interface.
507 static const arch_code_generator_if_t *TEMPLATE_get_code_generator_if(
511 return &TEMPLATE_code_gen_if;
514 list_sched_selector_t TEMPLATE_sched_selector;
517 * Returns the reg_pressure scheduler with to_appear_in_schedule() overloaded
519 static const list_sched_selector_t *TEMPLATE_get_list_sched_selector(
520 const void *self, list_sched_selector_t *selector)
525 TEMPLATE_sched_selector = trivial_selector;
526 TEMPLATE_sched_selector.to_appear_in_schedule = TEMPLATE_to_appear_in_schedule;
527 return &TEMPLATE_sched_selector;
530 static const ilp_sched_selector_t *TEMPLATE_get_ilp_sched_selector(
538 * Returns the necessary byte alignment for storing a register of given class.
540 static int TEMPLATE_get_reg_class_alignment(const void *self,
541 const arch_register_class_t *cls) {
542 ir_mode *mode = arch_register_class_mode(cls);
544 return get_mode_size_bytes(mode);
548 * Returns the libFirm configuration parameter for this backend.
550 static const backend_params *TEMPLATE_get_backend_params(void) {
551 static backend_params p = {
552 0, /* no dword lowering */
553 0, /* no inline assembly */
554 NULL, /* will be set later */
555 NULL, /* no creator function */
556 NULL, /* context for create_intrinsic_fkt */
557 NULL, /* parameter for if conversion */
558 NULL, /* float arithmetic mode */
559 0, /* no trampoline support: size 0 */
560 0, /* no trampoline support: align 0 */
561 NULL, /* no trampoline support: no trampoline builder */
562 4 /* alignment of stack parameter: typically 4 (32bit) or 8 (64bit) */
567 static const be_execution_unit_t ***TEMPLATE_get_allowed_execution_units(
568 const void *self, const ir_node *irn)
577 static const be_machine_t *TEMPLATE_get_machine(const void *self)
585 static ir_graph **TEMPLATE_get_backend_irg_list(const void *self,
593 static asm_constraint_flags_t TEMPLATE_parse_asm_constraint(const void *self,
598 return ASM_CONSTRAINT_FLAG_INVALID;
601 static int TEMPLATE_is_valid_clobber(const void *self, const char *clobber)
608 const arch_isa_if_t TEMPLATE_isa_if = {
611 NULL, /* handle intrinsics */
612 TEMPLATE_get_n_reg_class,
613 TEMPLATE_get_reg_class,
614 TEMPLATE_get_reg_class_for_mode,
615 TEMPLATE_get_call_abi,
616 TEMPLATE_get_code_generator_if,
617 TEMPLATE_get_list_sched_selector,
618 TEMPLATE_get_ilp_sched_selector,
619 TEMPLATE_get_reg_class_alignment,
620 TEMPLATE_get_backend_params,
621 TEMPLATE_get_allowed_execution_units,
622 TEMPLATE_get_machine,
623 TEMPLATE_get_backend_irg_list,
624 NULL, /* mark remat */
625 TEMPLATE_parse_asm_constraint,
626 TEMPLATE_is_valid_clobber
629 void be_init_arch_TEMPLATE(void)
631 be_register_isa_if("TEMPLATE", &TEMPLATE_isa_if);
634 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_arch_TEMPLATE);