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 lowering of Calls of intrinsic functions
23 * @author Michael Beck
42 #include "iropt_dbg.h"
44 /** Walker environment. */
45 typedef struct _walker_env {
46 pmap *c_map; /**< The intrinsic call map. */
47 unsigned nr_of_intrinsics; /**< statistics */
48 i_instr_record **i_map; /**< The intrinsic instruction map. */
52 * walker: call all mapper functions
54 static void call_mapper(ir_node *node, void *env) {
55 walker_env_t *wenv = env;
56 ir_op *op = get_irn_op(node);
61 const i_call_record *r;
64 symconst = get_Call_ptr(node);
65 if (! is_Global(symconst))
68 ent = get_Global_entity(symconst);
69 p = pmap_find(wenv->c_map, ent);
73 wenv->nr_of_intrinsics += r->i_mapper(node, r->ctx) ? 1 : 0;
76 if (op->code < (unsigned) ARR_LEN(wenv->i_map)) {
77 const i_instr_record *r = wenv->i_map[op->code];
78 /* run all possible mapper */
80 if (r->i_mapper(node, r->ctx)) {
81 ++wenv->nr_of_intrinsics;
90 /* Go through all graphs and map calls to intrinsic functions. */
91 unsigned lower_intrinsics(i_record *list, int length, int part_block_used) {
92 int i, n_ops = get_irp_n_opcodes();
94 pmap *c_map = pmap_create_ex(length);
95 i_instr_record **i_map;
96 unsigned nr_of_intrinsics = 0;
99 /* we use the ir_op generic pointers here */
100 NEW_ARR_A(const i_instr_record *, i_map, n_ops);
101 memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
103 /* fill a map for faster search */
104 for (i = length - 1; i >= 0; --i) {
105 if (list[i].i_call.kind == INTRINSIC_CALL) {
106 pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
108 ir_op *op = list[i].i_instr.op;
109 assert(op->code < (unsigned) ARR_LEN(i_map));
111 list[i].i_instr.link = i_map[op->code];
112 i_map[op->code] = &list[i].i_instr;
119 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
120 irg = get_irp_irg(i);
122 if (part_block_used) {
123 ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
124 collect_phiprojs(irg);
127 wenv.nr_of_intrinsics = 0;
128 irg_walk_graph(irg, NULL, call_mapper, &wenv);
131 ir_free_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
133 if (wenv.nr_of_intrinsics > 0) {
134 /* Changes detected: we might have added/removed nodes. */
135 set_irg_outs_inconsistent(irg);
136 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
138 /* Exception control flow might have changed / new block might have added. */
139 set_irg_doms_inconsistent(irg);
140 set_irg_extblk_inconsistent(irg);
141 set_irg_loopinfo_inconsistent(irg);
143 /* Calls might be removed/added. */
144 set_trouts_inconsistent();
147 irg_verify(irg, VRFY_NORMAL);
149 /* Optimize it, tuple might be created. */
150 optimize_graph_df(irg);
152 nr_of_intrinsics += wenv.nr_of_intrinsics;
157 return nr_of_intrinsics;
158 } /* lower_intrinsics */
161 * Helper function, replace the call by the given node.
163 * @param irn the result node
164 * @param call the call to replace
165 * @param mem the new mem result
166 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
167 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
169 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp) {
170 ir_node *block = get_nodes_block(call);
172 if (reg_jmp == NULL) {
174 /* Beware: do we need here a protection against CSE? Better we do it. */
175 int old_cse = get_opt_cse();
177 reg_jmp = new_r_Jmp(current_ir_graph, block);
178 set_opt_cse(old_cse);
181 irn = new_r_Tuple(current_ir_graph, block, 1, &irn);
183 turn_into_tuple(call, pn_Call_max);
184 set_Tuple_pred(call, pn_Call_M_regular, mem);
185 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
186 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
187 set_Tuple_pred(call, pn_Call_T_result, irn);
188 set_Tuple_pred(call, pn_Call_M_except, mem);
189 set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
192 /* A mapper for the integer abs. */
193 int i_mapper_abs(ir_node *call, void *ctx) {
194 ir_node *mem = get_Call_mem(call);
195 ir_node *block = get_nodes_block(call);
196 ir_node *op = get_Call_param(call, 0);
198 dbg_info *dbg = get_irn_dbg_info(call);
201 irn = new_rd_Abs(dbg, current_ir_graph, block, op, get_irn_mode(op));
202 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
203 replace_call(irn, call, mem, NULL, NULL);
207 /* A mapper for the alloca() function. */
208 int i_mapper_alloca(ir_node *call, void *ctx) {
209 ir_node *mem = get_Call_mem(call);
210 ir_node *block = get_nodes_block(call);
211 ir_node *op = get_Call_param(call, 0);
212 ir_node *irn, *exc, *no_exc;
213 dbg_info *dbg = get_irn_dbg_info(call);
216 if (mode_is_signed(get_irn_mode(op))) {
217 op = new_rd_Conv(dbg, current_ir_graph, block, op, mode_Iu);
220 irn = new_rd_Alloc(dbg, current_ir_graph, block, mem, op, firm_unknown_type, stack_alloc);
221 mem = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_M, pn_Alloc_M);
222 no_exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_regular);
223 exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_except);
224 irn = new_rd_Proj(dbg, current_ir_graph, block, irn, get_modeP_data(), pn_Alloc_res);
226 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
227 replace_call(irn, call, mem, no_exc, exc);
229 } /* i_mapper_alloca */
231 /* A mapper for the floating point sqrt. */
232 int i_mapper_sqrt(ir_node *call, void *ctx) {
235 ir_node *op = get_Call_param(call, 0);
241 tv = get_Const_tarval(op);
242 if (! tarval_is_null(tv) && !tarval_is_one(tv))
245 mem = get_Call_mem(call);
247 /* sqrt(0) = 0, sqrt(1) = 1 */
248 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
249 replace_call(op, call, mem, NULL, NULL);
251 } /* i_mapper_sqrt */
253 /* A mapper for the floating point cbrt. */
254 int i_mapper_cbrt(ir_node *call, void *ctx) {
257 ir_node *op = get_Call_param(call, 0);
263 tv = get_Const_tarval(op);
264 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
267 mem = get_Call_mem(call);
269 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
270 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
271 replace_call(op, call, mem, NULL, NULL);
273 } /* i_mapper_cbrt */
275 /* A mapper for the floating point pow. */
276 int i_mapper_pow(ir_node *call, void *ctx) {
279 ir_node *left = get_Call_param(call, 0);
280 ir_node *right = get_Call_param(call, 1);
281 ir_node *block = get_nodes_block(call);
282 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
285 if (is_Const(left) && is_Const_one(left)) {
286 /* pow (1.0, x) = 1.0 */
288 } else if (is_Const(right)) {
289 tarval *tv = get_Const_tarval(right);
290 if (tarval_is_null(tv)) {
291 /* pow(x, 0.0) = 1.0 */
292 ir_mode *mode = get_tarval_mode(tv);
293 irn = new_Const(mode, get_mode_one(mode));
294 } else if (tarval_is_one(tv)) {
295 /* pow(x, 1.0) = x */
297 } else if (tarval_is_minus_one(tv)) {
298 /* pow(x, -1.0) = 1/x */
306 mem = get_Call_mem(call);
307 dbg = get_irn_dbg_info(call);
310 ir_mode *mode = get_irn_mode(left);
313 irn = new_Const(mode, get_mode_one(mode));
314 quot = new_rd_Quot(dbg, current_ir_graph, block, mem, irn, left, mode, op_pin_state_pinned);
315 mem = new_r_Proj(current_ir_graph, block, quot, mode_M, pn_Quot_M);
316 irn = new_r_Proj(current_ir_graph, block, quot, mode, pn_Quot_res);
317 reg_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_regular);
318 exc_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_except);
320 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
321 replace_call(irn, call, mem, reg_jmp, exc_jmp);
325 /* A mapper for the floating point exp. */
326 int i_mapper_exp(ir_node *call, void *ctx) {
327 ir_node *val = get_Call_param(call, 0);
330 if (is_Const(val) && is_Const_null(val)) {
332 ir_node *block = get_nodes_block(call);
333 ir_mode *mode = get_irn_mode(val);
334 ir_node *irn = new_Const(mode, get_mode_one(mode));
335 ir_node *mem = get_Call_mem(call);
336 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
337 replace_call(irn, call, mem, NULL, NULL);
344 * A mapper for mapping f(0.0) to 0.0.
346 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason) {
347 ir_node *val = get_Call_param(call, 0);
350 if (is_Const(val) && is_Const_null(val)) {
352 ir_node *mem = get_Call_mem(call);
353 DBG_OPT_ALGSIM0(call, val, reason);
354 replace_call(val, call, mem, NULL, NULL);
358 } /* i_mapper_zero_to_zero */
361 * A mapper for mapping f(1.0) to 0.0.
363 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason) {
364 ir_node *val = get_Call_param(call, 0);
367 if (is_Const(val) && is_Const_one(val)) {
368 /* acos(1.0) = 0.0 */
369 ir_node *block = get_nodes_block(call);
370 ir_mode *mode = get_irn_mode(val);
371 ir_node *irn = new_Const(mode, get_mode_null(mode));
372 ir_node *mem = get_Call_mem(call);
373 DBG_OPT_ALGSIM0(call, irn, reason);
374 replace_call(irn, call, mem, NULL, NULL);
378 } /* i_mapper_one_to_zero */
381 * A mapper for mapping a functions with the following characteristics:
385 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason) {
386 ir_node *val = get_Call_param(call, 0);
389 if (is_strictConv(val)) {
390 ir_node *op = get_Conv_op(val);
392 /* f(-x) = f(x) with strictConv */
393 ir_node *block = get_nodes_block(call);
394 ir_mode *mode = get_irn_mode(val);
395 dbg_info *dbg = get_irn_dbg_info(val);
397 op = get_Minus_op(op);
398 val = new_rd_Conv(dbg, current_ir_graph, block, op, mode);
401 set_Conv_strict(val, 1);
403 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
404 set_Call_param(call, 0, val);
406 } else if (is_Minus(val)) {
408 val = get_Minus_op(val);
409 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
410 set_Call_param(call, 0, val);
413 if (is_Const(val) && is_Const_null(val)) {
415 ir_node *block = get_nodes_block(call);
416 ir_mode *mode = get_irn_mode(val);
417 ir_node *irn = new_Const(mode, get_mode_one(mode));
418 ir_node *mem = get_Call_mem(call);
419 DBG_OPT_ALGSIM0(call, irn, reason);
420 replace_call(irn, call, mem, NULL, NULL);
424 } /* i_mapper_symmetric_zero_to_one */
426 /* A mapper for the floating point log. */
427 int i_mapper_log(ir_node *call, void *ctx) {
429 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
432 /* A mapper for the floating point sin. */
433 int i_mapper_sin(ir_node *call, void *ctx) {
435 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
438 /* A mapper for the floating point cos. */
439 int i_mapper_cos(ir_node *call, void *ctx) {
440 /* cos(0.0) = 1.0, cos(-x) = x */
441 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
444 /* A mapper for the floating point tan. */
445 int i_mapper_tan(ir_node *call, void *ctx) {
447 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
450 /* A mapper for the floating point asin. */
451 int i_mapper_asin(ir_node *call, void *ctx) {
452 /* asin(0.0) = 0.0 */
453 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
454 } /* i_mapper_asin */
456 /* A mapper for the floating point acos. */
457 int i_mapper_acos(ir_node *call, void *ctx) {
458 /* acos(1.0) = 0.0 */
459 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
460 } /* i_mapper_acos */
462 /* A mapper for the floating point atan. */
463 int i_mapper_atan(ir_node *call, void *ctx) {
464 /* atan(0.0) = 0.0 */
465 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
466 } /* i_mapper_atan */
468 /* A mapper for the floating point sinh. */
469 int i_mapper_sinh(ir_node *call, void *ctx) {
470 /* sinh(0.0) = 0.0 */
471 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
472 } /* i_mapper_sinh */
474 /* A mapper for the floating point cosh. */
475 int i_mapper_cosh(ir_node *call, void *ctx) {
476 /* cosh(0.0) = 1.0, cosh(-x) = x */
477 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
478 } /* i_mapper_cosh */
480 /* A mapper for the floating point tanh. */
481 int i_mapper_tanh(ir_node *call, void *ctx) {
482 /* tanh(0.0) = 0.0 */
483 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
484 } /* i_mapper_tanh */
487 * Return the const entity that is accessed through the pointer ptr or
488 * NULL if there is no entity (or the entity is not constant).
490 * @param ptr the pointer
492 static ir_entity *get_const_entity(ir_node *ptr) {
493 /* FIXME: this cannot handle constant strings inside struct initializers yet */
494 if (is_Global(ptr)) {
495 ir_entity *ent = get_Global_entity(ptr);
497 if (get_entity_variability(ent) == variability_constant) {
498 /* a constant entity */
503 } /* get_const_entity */
506 * Calculate the value of strlen if possible.
508 * @param ent the entity
509 * @param res_tp the result type
511 * @return a Const node containing the strlen() result or NULL
512 * if the evaluation fails
514 static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp) {
515 ir_type *tp = get_entity_type(ent);
519 if (! is_Array_type(tp))
521 tp = get_array_element_type(tp);
522 if (! is_Primitive_type(tp))
524 mode = get_type_mode(tp);
526 /* FIXME: This is too restrict, as the type char might be more the 8bits */
527 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
530 n = get_compound_ent_n_values(ent);
531 for (i = 0; i < n; ++i) {
532 ir_node *irn = get_compound_ent_value(ent, i);
537 if (is_Const_null(irn)) {
538 /* found the length */
544 tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
545 return new_Const_type(tv, res_tp);
550 /* A mapper for strlen */
551 int i_mapper_strlen(ir_node *call, void *ctx) {
552 ir_node *s = get_Call_param(call, 0);
553 ir_entity *ent = get_const_entity(s);
557 /* FIXME: this cannot handle constant strings inside struct initializers yet */
559 /* a constant entity */
560 ir_type *tp = get_Call_type(call);
563 tp = get_method_res_type(tp, 0);
564 irn = eval_strlen(ent, tp);
567 ir_node *mem = get_Call_mem(call);
568 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
569 replace_call(irn, call, mem, NULL, NULL);
574 } /* i_mapper_strlen */
577 * Calculate the value of strlen if possible.
579 * @param left the left entity
580 * @param right the right entity
581 * @param res_tp the result type
583 * @return a Const node containing the strcmp() result or NULL
584 * if the evaluation fails
586 static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp) {
591 tp = get_entity_type(left);
592 if (! is_Array_type(tp))
594 tp = get_array_element_type(tp);
595 if (! is_Primitive_type(tp))
597 mode = get_type_mode(tp);
599 /* FIXME: This is too restrict, as the type char might be more the 8bits */
600 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
603 tp = get_entity_type(right);
604 if (! is_Array_type(tp))
606 tp = get_array_element_type(tp);
607 if (! is_Primitive_type(tp))
609 mode = get_type_mode(tp);
611 /* FIXME: This is too restrict, as the type char might be more the 8bits */
612 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
615 n = get_compound_ent_n_values(left);
616 n_r = get_compound_ent_n_values(right);
619 for (i = 0; i < n; ++i) {
624 irn = get_compound_ent_value(left, i);
627 tv = get_Const_tarval(irn);
628 v_l = get_tarval_long(tv);
630 irn = get_compound_ent_value(right, i);
633 tv = get_Const_tarval(irn);
634 v_r = get_tarval_long(tv);
651 /* we found an end */
652 tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
653 return new_Const_type(tv, res_tp);
659 * Checks if an entity represents the empty string.
661 * @param ent the entity
663 * @return non-zero if ent represents the empty string
665 static int is_empty_string(ir_entity *ent) {
666 ir_type *tp = get_entity_type(ent);
671 if (! is_Array_type(tp))
673 tp = get_array_element_type(tp);
674 if (! is_Primitive_type(tp))
676 mode = get_type_mode(tp);
678 /* FIXME: This is too restrict, as the type char might be more the 8bits */
679 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
682 n = get_compound_ent_n_values(ent);
685 irn = get_compound_ent_value(ent, 0);
687 return is_Const(irn) && is_Const_null(irn);
688 } /* is_empty_string */
690 /* A mapper for strcmp */
691 int i_mapper_strcmp(ir_node *call, void *ctx) {
692 ir_node *left = get_Call_param(call, 0);
693 ir_node *right = get_Call_param(call, 1);
697 ir_type *call_tp = get_Call_type(call);
698 ir_type *res_tp = get_method_res_type(call_tp, 0);
699 ir_entity *ent_l, *ent_r;
705 /* do some type checks first */
706 if (! is_Primitive_type(res_tp))
708 char_tp = get_method_param_type(call_tp, 0);
709 if (char_tp != get_method_param_type(call_tp, 1))
711 if (! is_Pointer_type(char_tp))
713 char_tp = get_pointer_points_to_type(char_tp);
716 /* a strcmp(s, s) ==> 0 */
717 ir_node *mem = get_Call_mem(call);
718 ir_mode *mode = get_type_mode(res_tp);
719 ir_node *block = get_nodes_block(call);
721 irn = new_Const(mode, get_mode_null(mode));
722 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
723 replace_call(irn, call, mem, NULL, NULL);
726 ent_l = get_const_entity(left);
727 ent_r = get_const_entity(right);
729 if (ent_l != NULL && ent_r != NULL) {
730 /* both entities are const, try to evaluate */
731 irn = eval_strcmp(ent_l, ent_r, res_tp);
732 } else if (ent_l != NULL) {
733 if (is_empty_string(ent_l)) {
734 /* s strcmp("", s) ==> -(*s)*/
736 goto replace_by_call;
738 } else if (ent_r != NULL) {
739 if (is_empty_string(ent_r)) {
740 /* s strcmp(s, "") ==> (*s) */
741 ir_node *mem, *block;
747 mem = get_Call_mem(call);
748 block = get_nodes_block(call);
749 dbg = get_irn_dbg_info(call);
750 mode = get_type_mode(char_tp);
752 /* replace the strcmp by (*x) */
753 irn = new_rd_Load(dbg, current_ir_graph, block, mem, v, mode);
754 mem = new_r_Proj(current_ir_graph, block, irn, mode_M, pn_Load_M);
755 exc = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_except);
756 reg = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_regular);
757 irn = new_r_Proj(current_ir_graph, block, irn, mode, pn_Load_res);
759 /* conv to the result mode */
760 mode = get_type_mode(res_tp);
761 irn = new_rd_Conv(dbg, current_ir_graph, block, irn, mode);
764 /* negate in the ("", s) case */
765 irn = new_rd_Minus(dbg, current_ir_graph, block, irn, mode);
771 ir_node *mem = get_Call_mem(call);
772 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
773 replace_call(irn, call, mem, reg, exc);
778 } /* i_mapper_strcmp */
780 /* A mapper for strncmp */
781 int i_mapper_strncmp(ir_node *call, void *ctx) {
782 ir_node *left = get_Call_param(call, 0);
783 ir_node *right = get_Call_param(call, 1);
784 ir_node *len = get_Call_param(call, 2);
788 if (left == right || (is_Const(len) && is_Const_null(len))) {
789 /* a strncmp(s, s, len) ==> 0 OR
790 a strncmp(a, b, 0) ==> 0 */
791 ir_node *mem = get_Call_mem(call);
792 ir_node *adr = get_Call_ptr(call);
793 ir_entity *ent = get_SymConst_entity(adr);
794 ir_type *call_tp = get_entity_type(ent);
795 ir_type *res_tp = get_method_res_type(call_tp, 0);
796 ir_mode *mode = get_type_mode(res_tp);
797 ir_node *block = get_nodes_block(call);
799 irn = new_Const(mode, get_mode_null(mode));
800 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
801 replace_call(irn, call, mem, NULL, NULL);
805 } /* i_mapper_strncmp */
807 /* A mapper for memcpy */
808 int i_mapper_memcpy(ir_node *call, void *ctx) {
809 ir_node *len = get_Call_param(call, 2);
812 if (is_Const(len) && is_Const_null(len)) {
813 /* a memcpy(d, s, 0) ==> d */
814 ir_node *mem = get_Call_mem(call);
815 ir_node *dst = get_Call_param(call, 0);
817 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
818 replace_call(dst, call, mem, NULL, NULL);
822 } /* i_mapper_memcpy */
824 /* A mapper for memset */
825 int i_mapper_memset(ir_node *call, void *ctx) {
826 ir_node *len = get_Call_param(call, 2);
829 if (is_Const(len) && is_Const_null(len)) {
830 /* a memset(d, C, 0) ==> d */
831 ir_node *mem = get_Call_mem(call);
832 ir_node *dst = get_Call_param(call, 0);
834 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
835 replace_call(dst, call, mem, NULL, NULL);
839 } /* i_mapper_memset */
842 * Returns the result mode of a node.
844 static ir_mode *get_irn_res_mode(ir_node *node) {
845 switch (get_irn_opcode(node)) {
846 case iro_Load: return get_Load_mode(node);
847 case iro_Quot: return get_Quot_resmode(node);
848 case iro_Div: return get_Div_resmode(node);
849 case iro_Mod: return get_Mod_resmode(node);
850 case iro_DivMod: return get_DivMod_resmode(node);
851 default: return NULL;
853 } /* get_irn_res_mode */
855 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
857 /* A mapper for mapping unsupported instructions to runtime calls. */
858 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) {
859 int i, j, arity, first, n_param, n_res;
862 ir_node *mem, *bl, *call, *addr, *res_proj;
866 ir_mode *mode = get_irn_mode(node);
868 if (mode != rt->mode)
870 /* check if the result modes match */
871 if (mode == mode_T && rt->res_mode != NULL) {
872 mode = get_irn_res_mode(node);
873 if (mode != rt->res_mode)
877 arity = get_irn_arity(node);
881 mtp = get_entity_type(rt->ent);
882 n_param = get_method_n_params(mtp);
883 irg = current_ir_graph;
885 mem = get_irn_n(node, 0);
886 if (get_irn_mode(mem) != mode_M) {
887 mem = new_r_NoMem(irg);
892 /* check if the modes of the predecessors match the parameter modes */
893 if (arity - first != n_param)
896 for (i = first, j = 0; i < arity; ++i, ++j) {
897 ir_type *param_tp = get_method_param_type(mtp, j);
898 ir_node *pred = get_irn_n(node, i);
900 if (get_type_mode(param_tp) != get_irn_mode(pred))
904 n_res = get_method_n_ress(mtp);
906 /* step 0: calculate the number of needed Proj's */
908 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
909 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
910 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
911 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
912 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
915 if (rt->mode != mode_T) /* must be mode_T */
920 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
924 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
925 bl = get_nodes_block(node);
929 NEW_ARR_A(ir_node *, in, n_param);
930 for (i = 0; i < n_param; ++i)
931 in[i] = get_irn_n(node, first + i);
934 /* step 1: create the call */
935 sym.entity_p = rt->ent;
936 addr = new_r_SymConst(irg, bl, mode_P_code, sym, symconst_addr_ent);
937 call = new_rd_Call(get_irn_dbg_info(node), irg, bl, mem, addr, n_param, in, mtp);
938 set_irn_pinned(call, get_irn_pinned(node));
941 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
949 turn_into_tuple(node, n_proj);
951 for (i = 0; i < n_proj; ++i)
952 set_Tuple_pred(node, i, new_r_Bad(irg));
953 if (rt->mem_proj_nr >= 0)
954 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_regular));
955 if (!is_NoMem(mem)) {
956 /* Exceptions can only be handled with real memory */
957 if (rt->regular_proj_nr >= 0)
958 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_regular));
959 if (rt->exc_proj_nr >= 0)
960 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_except));
961 if (rt->exc_mem_proj_nr >= 0)
962 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_except));
965 if (rt->res_proj_nr >= 0)
966 for (i = 0; i < n_res; ++i)
967 set_Tuple_pred(node, rt->res_proj_nr + i,
968 new_r_Proj(irg, bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
971 /* only one return value supported */
973 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
975 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
976 res_proj = new_r_Proj(irg, bl, res_proj, mode, 0);
978 exchange(node, res_proj);
982 /* should not happen */
984 } /* i_mapper_RuntimeCall */