2 * Copyright (C) 1995-2007 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
43 #include "iropt_dbg.h"
45 /** Walker environment */
46 typedef struct _walker_env {
47 pmap *c_map; /**< The intrinsic call map. */
48 unsigned nr_of_intrinsics; /**< statistics */
49 i_instr_record **i_map; /**< The intrinsic instruction map. */
53 * walker: call all mapper functions
55 static void call_mapper(ir_node *node, void *env) {
56 walker_env_t *wenv = env;
57 ir_op *op = get_irn_op(node);
62 const i_call_record *r;
65 symconst = get_Call_ptr(node);
66 if (get_irn_op(symconst) != op_SymConst ||
67 get_SymConst_kind(symconst) != symconst_addr_ent)
70 ent = get_SymConst_entity(symconst);
71 p = pmap_find(wenv->c_map, ent);
75 wenv->nr_of_intrinsics += r->i_mapper(node, r->ctx) ? 1 : 0;
78 if (op->code < (unsigned) ARR_LEN(wenv->i_map)) {
79 const i_instr_record *r = wenv->i_map[op->code];
80 /* run all possible mapper */
82 if (r->i_mapper(node, r->ctx)) {
83 ++wenv->nr_of_intrinsics;
92 /* Go through all graphs and map calls to intrinsic functions. */
93 unsigned lower_intrinsics(i_record *list, int length, int part_block_used) {
94 int i, n_ops = get_irp_n_opcodes();
96 pmap *c_map = pmap_create_ex(length);
97 i_instr_record **i_map;
98 unsigned nr_of_intrinsics = 0;
101 /* we use the ir_op generic pointers here */
102 NEW_ARR_A(const i_instr_record *, i_map, n_ops);
103 memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
105 /* fill a map for faster search */
106 for (i = length - 1; i >= 0; --i) {
107 if (list[i].i_call.kind == INTRINSIC_CALL) {
108 pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
110 ir_op *op = list[i].i_instr.op;
111 assert(op->code < (unsigned) ARR_LEN(i_map));
113 list[i].i_instr.link = i_map[op->code];
114 i_map[op->code] = &list[i].i_instr;
121 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
122 irg = get_irp_irg(i);
125 collect_phiprojs(irg);
127 wenv.nr_of_intrinsics = 0;
128 irg_walk_graph(irg, NULL, call_mapper, &wenv);
130 if (wenv.nr_of_intrinsics) {
131 /* changes detected */
132 set_irg_outs_inconsistent(irg);
133 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
135 /* exception control flow might have changed */
136 set_irg_doms_inconsistent(irg);
137 set_irg_extblk_inconsistent(irg);
138 set_irg_loopinfo_inconsistent(irg);
140 /* calls might be removed/added */
141 set_trouts_inconsistent();
143 /* optimize it, tuple might be created */
144 local_optimize_graph(irg);
146 nr_of_intrinsics += wenv.nr_of_intrinsics;
151 return nr_of_intrinsics;
152 } /* lower_intrinsics */
155 * Helper function, replace the call by the given node.
157 * @param irn the result node
158 * @param call the call to replace
159 * @param mem the new mem result
160 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
161 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
163 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp) {
164 if (reg_jmp == NULL) {
165 ir_node *block = get_nodes_block(call);
167 /* Beware: do we need here a protection against CSE? Better we do it. */
168 int old_cse = get_opt_cse();
170 reg_jmp = new_r_Jmp(current_ir_graph, block);
171 set_opt_cse(old_cse);
174 irn = new_Tuple(1, &irn);
176 turn_into_tuple(call, pn_Call_max);
177 set_Tuple_pred(call, pn_Call_M_regular, mem);
178 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
179 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
180 set_Tuple_pred(call, pn_Call_T_result, irn);
181 set_Tuple_pred(call, pn_Call_M_except, mem);
182 set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
185 /* A mapper for the integer abs. */
186 int i_mapper_abs(ir_node *call, void *ctx) {
187 ir_node *mem = get_Call_mem(call);
188 ir_node *block = get_nodes_block(call);
189 ir_node *op = get_Call_param(call, 0);
191 dbg_info *dbg = get_irn_dbg_info(call);
194 irn = new_rd_Abs(dbg, current_ir_graph, block, op, get_irn_mode(op));
195 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
196 replace_call(irn, call, mem, NULL, NULL);
200 /* A mapper for the alloca() function. */
201 int i_mapper_alloca(ir_node *call, void *ctx) {
202 ir_node *mem = get_Call_mem(call);
203 ir_node *block = get_nodes_block(call);
204 ir_node *op = get_Call_param(call, 0);
205 ir_node *irn, *exc, *no_exc;
206 dbg_info *dbg = get_irn_dbg_info(call);
209 irn = new_rd_Alloc(dbg, current_ir_graph, block, mem, op, firm_unknown_type, stack_alloc);
210 mem = new_Proj(irn, mode_M, pn_Alloc_M);
211 no_exc = new_Proj(irn, mode_X, pn_Alloc_X_regular);
212 exc = new_Proj(irn, mode_X, pn_Alloc_X_except);
213 irn = new_Proj(irn, get_modeP_data(), pn_Alloc_res);
215 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
216 replace_call(irn, call, mem, no_exc, exc);
218 } /* i_mapper_alloca */
220 /* A mapper for the floating point sqrt. */
221 int i_mapper_sqrt(ir_node *call, void *ctx) {
224 ir_node *op = get_Call_param(call, 0);
230 tv = get_Const_tarval(op);
231 if (! tarval_is_null(tv) && !tarval_is_one(tv))
234 mem = get_Call_mem(call);
236 /* sqrt(0) = 0, sqrt(1) = 1 */
237 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
238 replace_call(op, call, mem, NULL, NULL);
240 } /* i_mapper_sqrt */
242 /* A mapper for the floating point cbrt. */
243 int i_mapper_cbrt(ir_node *call, void *ctx) {
246 ir_node *op = get_Call_param(call, 0);
252 tv = get_Const_tarval(op);
253 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
256 mem = get_Call_mem(call);
258 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
259 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
260 replace_call(op, call, mem, NULL, NULL);
262 } /* i_mapper_cbrt */
264 /* A mapper for the floating point pow. */
265 int i_mapper_pow(ir_node *call, void *ctx) {
268 ir_node *left = get_Call_param(call, 0);
269 ir_node *right = get_Call_param(call, 1);
270 ir_node *block = get_nodes_block(call);
271 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
274 if (is_Const(left) && is_Const_one(left)) {
275 /* pow (1.0, x) = 1.0 */
277 } else if (is_Const(right)) {
278 tarval *tv = get_Const_tarval(right);
279 if (tarval_is_null(tv)) {
280 /* pow(x, 0.0) = 1.0 */
281 ir_mode *mode = get_tarval_mode(tv);
282 irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
283 } else if (tarval_is_one(tv)) {
284 /* pow(x, 1.0) = x */
286 } else if (tarval_is_minus_one(tv)) {
287 /* pow(x, -1.0) = 1/x */
295 mem = get_Call_mem(call);
296 dbg = get_irn_dbg_info(call);
299 ir_mode *mode = get_irn_mode(left);
302 irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
303 quot = new_rd_Quot(dbg, current_ir_graph, block, mem, irn, left, mode, op_pin_state_pinned);
304 mem = new_r_Proj(current_ir_graph, block, quot, mode_M, pn_Quot_M);
305 irn = new_r_Proj(current_ir_graph, block, quot, mode, pn_Quot_res);
306 reg_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_regular);
307 exc_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_except);
309 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
310 replace_call(irn, call, mem, reg_jmp, exc_jmp);
314 /* A mapper for the floating point exp. */
315 int i_mapper_exp(ir_node *call, void *ctx) {
316 ir_node *val = get_Call_param(call, 0);
319 if (is_Const(val) && is_Const_null(val)) {
321 ir_node *block = get_nodes_block(call);
322 ir_mode *mode = get_irn_mode(val);
323 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
324 ir_node *mem = get_Call_mem(call);
325 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
326 replace_call(irn, call, mem, NULL, NULL);
332 /* A mapper for the floating point log. */
333 int i_mapper_log(ir_node *call, void *ctx) {
334 ir_node *val = get_Call_param(call, 0);
337 if (is_Const(val) && is_Const_one(val)) {
339 ir_node *block = get_nodes_block(call);
340 ir_mode *mode = get_irn_mode(val);
341 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
342 ir_node *mem = get_Call_mem(call);
343 DBG_OPT_ALGSIM0(call, val, FS_OPT_RTS_LOG);
344 replace_call(val, call, mem, NULL, NULL);
351 * A mapper for mapping f(0.0) to 0.0.
353 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason) {
354 ir_node *val = get_Call_param(call, 0);
357 if (is_Const(val) && is_Const_null(val)) {
359 ir_node *mem = get_Call_mem(call);
360 DBG_OPT_ALGSIM0(call, val, reason);
361 replace_call(val, call, mem, NULL, NULL);
365 } /* i_mapper_zero_to_zero */
368 * A mapper for mapping f(1.0) to 0.0.
370 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason) {
371 ir_node *val = get_Call_param(call, 0);
374 if (is_Const(val) && is_Const_one(val)) {
375 /* acos(1.0) = 0.0 */
376 ir_node *block = get_nodes_block(call);
377 ir_mode *mode = get_irn_mode(val);
378 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
379 ir_node *mem = get_Call_mem(call);
380 DBG_OPT_ALGSIM0(call, irn, reason);
381 replace_call(irn, call, mem, NULL, NULL);
385 } /* i_mapper_one_to_zero */
388 * A mapper for mapping a functions with the following characteristics:
392 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason) {
393 ir_node *val = get_Call_param(call, 0);
396 if (is_strictConv(val)) {
397 ir_node *op = get_Conv_op(val);
399 /* f(-x) = f(x) with strictConv */
400 ir_node *block = get_nodes_block(call);
401 ir_mode *mode = get_irn_mode(val);
402 dbg_info *dbg = get_irn_dbg_info(val);
404 op = get_Minus_op(op);
405 val = new_rd_Conv(dbg, current_ir_graph, block, op, mode);
408 set_Conv_strict(val, 1);
410 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
411 set_Call_param(call, 0, val);
413 } else if (is_Minus(val)) {
415 val = get_Minus_op(val);
416 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
417 set_Call_param(call, 0, val);
420 if (is_Const(val) && is_Const_null(val)) {
422 ir_node *block = get_nodes_block(call);
423 ir_mode *mode = get_irn_mode(val);
424 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
425 ir_node *mem = get_Call_mem(call);
426 DBG_OPT_ALGSIM0(call, irn, reason);
427 replace_call(irn, call, mem, NULL, NULL);
431 } /* i_mapper_symmetric_zero_to_one */
433 /* A mapper for the floating point sin. */
434 int i_mapper_sin(ir_node *call, void *ctx) {
436 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
439 /* A mapper for the floating point cos. */
440 int i_mapper_cos(ir_node *call, void *ctx) {
441 /* cos(0.0) = 1.0, cos(-x) = x */
442 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
445 /* A mapper for the floating point tan. */
446 int i_mapper_tan(ir_node *call, void *ctx) {
448 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
451 /* A mapper for the floating point asin. */
452 int i_mapper_asin(ir_node *call, void *ctx) {
453 /* asin(0.0) = 0.0 */
454 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
455 } /* i_mapper_asin */
457 /* A mapper for the floating point acos. */
458 int i_mapper_acos(ir_node *call, void *ctx) {
459 /* acos(1.0) = 0.0 */
460 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
461 } /* i_mapper_acos */
463 /* A mapper for the floating point atan. */
464 int i_mapper_atan(ir_node *call, void *ctx) {
465 /* atan(0.0) = 0.0 */
466 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
467 } /* i_mapper_atan */
469 /* A mapper for the floating point sinh. */
470 int i_mapper_sinh(ir_node *call, void *ctx) {
471 /* sinh(0.0) = 0.0 */
472 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
473 } /* i_mapper_sinh */
475 /* A mapper for the floating point cosh. */
476 int i_mapper_cosh(ir_node *call, void *ctx) {
477 /* cosh(0.0) = 1.0, cosh(-x) = x */
478 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
479 } /* i_mapper_cosh */
481 /* A mapper for the floating point tanh. */
482 int i_mapper_tanh(ir_node *call, void *ctx) {
483 /* tanh(0.0) = 0.0 */
484 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
485 } /* i_mapper_tanh */
488 * Return the const entity that is accessed through the pointer ptr or
489 * NULL if there is no entity (or the entity is not constant).
491 * @param ptr the pointer
493 static ir_entity *get_const_entity(ir_node *ptr) {
494 /* FIXME: this cannot handle constant strings inside struct initializers yet */
495 if (is_SymConst(ptr) && get_SymConst_kind(ptr) == symconst_addr_ent) {
496 ir_entity *ent = get_SymConst_entity(ptr);
498 if (get_entity_variability(ent) == variability_constant) {
499 /* a constant entity */
504 } /* get_const_entity */
507 * Calculate the value of strlen if possible.
509 * @param ent the entity
510 * @param res_tp the result type
512 * @return a Const node containing the strlen() result or NULL
513 * if the evaluation fails
515 static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp) {
516 ir_type *tp = get_entity_type(ent);
520 if (! is_Array_type(tp))
522 tp = get_array_element_type(tp);
523 if (! is_Primitive_type(tp))
525 mode = get_type_mode(tp);
527 /* FIXME: This is too restrict, as the type char might be more the 8bits */
528 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
531 n = get_compound_ent_n_values(ent);
532 for (i = 0; i < n; ++i) {
533 ir_node *irn = get_compound_ent_value(ent, i);
538 if (is_Const_null(irn)) {
539 /* found the length */
545 tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
546 return new_Const_type(tv, res_tp);
551 /* A mapper for strlen */
552 int i_mapper_strlen(ir_node *call, void *ctx) {
553 ir_node *s = get_Call_param(call, 0);
554 ir_entity *ent = get_const_entity(s);
556 /* FIXME: this cannot handle constant strings inside struct initializers yet */
558 /* a constant entity */
559 ir_type *tp = get_Call_type(call);
562 tp = get_method_res_type(tp, 0);
563 irn = eval_strlen(ent, tp);
566 ir_node *mem = get_Call_mem(call);
567 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
568 replace_call(irn, call, mem, NULL, NULL);
573 } /* i_mapper_strlen */
576 * Calculate the value of strlen if possible.
578 * @param left the left entity
579 * @param right the right entity
580 * @param res_tp the result type
582 * @return a Const node containing the strcmp() result or NULL
583 * if the evaluation fails
585 static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp) {
590 tp = get_entity_type(left);
591 if (! is_Array_type(tp))
593 tp = get_array_element_type(tp);
594 if (! is_Primitive_type(tp))
596 mode = get_type_mode(tp);
598 /* FIXME: This is too restrict, as the type char might be more the 8bits */
599 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
602 tp = get_entity_type(right);
603 if (! is_Array_type(tp))
605 tp = get_array_element_type(tp);
606 if (! is_Primitive_type(tp))
608 mode = get_type_mode(tp);
610 /* FIXME: This is too restrict, as the type char might be more the 8bits */
611 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
614 n = get_compound_ent_n_values(left);
615 n_r = get_compound_ent_n_values(right);
618 for (i = 0; i < n; ++i) {
623 irn = get_compound_ent_value(left, i);
626 tv = get_Const_tarval(irn);
627 v_l = get_tarval_long(tv);
629 irn = get_compound_ent_value(right, i);
632 tv = get_Const_tarval(irn);
633 v_r = get_tarval_long(tv);
650 /* we found an end */
651 tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
652 return new_Const_type(tv, res_tp);
658 * Checks if an entity represents the empty string.
660 * @param ent the entity
662 * @return non-zero if ent represents the empty string
664 static int is_empty_string(ir_entity *ent) {
665 ir_type *tp = get_entity_type(ent);
670 if (! is_Array_type(tp))
672 tp = get_array_element_type(tp);
673 if (! is_Primitive_type(tp))
675 mode = get_type_mode(tp);
677 /* FIXME: This is too restrict, as the type char might be more the 8bits */
678 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
681 n = get_compound_ent_n_values(ent);
684 irn = get_compound_ent_value(ent, 0);
686 return is_Const(irn) && is_Const_null(irn);
687 } /* is_empty_string */
689 /* A mapper for strcmp */
690 int i_mapper_strcmp(ir_node *call, void *ctx) {
691 ir_node *left = get_Call_param(call, 0);
692 ir_node *right = get_Call_param(call, 1);
696 ir_node *adr = get_Call_ptr(call);
697 ir_entity *ent = get_SymConst_entity(adr);
698 ir_type *call_tp = get_entity_type(ent);
699 ir_type *res_tp = get_method_res_type(call_tp, 0);
700 ir_entity *ent_l, *ent_r;
706 /* do some type checks first */
707 if (! is_Primitive_type(res_tp))
709 char_tp = get_method_param_type(call_tp, 0);
710 if (char_tp != get_method_param_type(call_tp, 1))
712 if (! is_Pointer_type(char_tp))
714 char_tp = get_pointer_points_to_type(char_tp);
717 /* a strcmp(s, s) ==> 0 */
718 ir_node *mem = get_Call_mem(call);
719 ir_mode *mode = get_type_mode(res_tp);
720 ir_node *block = get_nodes_block(call);
722 irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
723 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
724 replace_call(irn, call, mem, NULL, NULL);
727 ent_l = get_const_entity(left);
728 ent_r = get_const_entity(right);
730 if (ent_l != NULL && ent_r != NULL) {
731 /* both entities are const, try to evaluate */
732 irn = eval_strcmp(ent_l, ent_r, res_tp);
733 } else if (ent_l != NULL) {
734 if (is_empty_string(ent_l)) {
735 /* s strcmp("", s) ==> -(*s)*/
737 goto replace_by_call;
739 } else if (ent_r != NULL) {
740 if (is_empty_string(ent_r)) {
741 /* s strcmp(s, "") ==> (*s) */
742 ir_node *mem, *block;
748 mem = get_Call_mem(call);
749 block = get_nodes_block(call);
750 dbg = get_irn_dbg_info(call);
751 mode = get_type_mode(char_tp);
753 /* replace the strcmp by (*x) */
754 irn = new_rd_Load(dbg, current_ir_graph, block, mem, v, mode);
755 mem = new_r_Proj(current_ir_graph, block, irn, mode_M, pn_Load_M);
756 exc = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_except);
757 reg = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_regular);
758 irn = new_r_Proj(current_ir_graph, block, irn, mode, pn_Load_res);
760 /* conv to the result mode */
761 mode = get_type_mode(res_tp);
762 irn = new_rd_Conv(dbg, current_ir_graph, block, irn, mode);
765 /* negate in the ("", s) case */
766 irn = new_rd_Minus(dbg, current_ir_graph, block, irn, mode);
772 ir_node *mem = get_Call_mem(call);
773 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
774 replace_call(irn, call, mem, reg, exc);
779 } /* i_mapper_strcmp */
781 /* A mapper for strncmp */
782 int i_mapper_strncmp(ir_node *call, void *ctx) {
783 ir_node *left = get_Call_param(call, 0);
784 ir_node *right = get_Call_param(call, 1);
785 ir_node *len = get_Call_param(call, 2);
789 if (left == right || (is_Const(len) && is_Const_null(len))) {
790 /* a strncmp(s, s, len) ==> 0 OR
791 a strncmp(a, b, 0) ==> 0 */
792 ir_node *mem = get_Call_mem(call);
793 ir_node *adr = get_Call_ptr(call);
794 ir_entity *ent = get_SymConst_entity(adr);
795 ir_type *call_tp = get_entity_type(ent);
796 ir_type *res_tp = get_method_res_type(call_tp, 0);
797 ir_mode *mode = get_type_mode(res_tp);
798 ir_node *block = get_nodes_block(call);
800 irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
801 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
802 replace_call(irn, call, mem, NULL, NULL);
806 } /* i_mapper_strncmp */
808 /* A mapper for memcpy */
809 int i_mapper_memcpy(ir_node *call, void *ctx) {
810 ir_node *len = get_Call_param(call, 2);
813 if (is_Const(len) && is_Const_null(len)) {
814 /* a memcpy(d, s, 0) ==> d */
815 ir_node *mem = get_Call_mem(call);
816 ir_node *dst = get_Call_param(call, 0);
818 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
819 replace_call(dst, call, mem, NULL, NULL);
823 } /* i_mapper_memcpy */
825 /* A mapper for memset */
826 int i_mapper_memset(ir_node *call, void *ctx) {
827 ir_node *len = get_Call_param(call, 2);
830 if (is_Const(len) && is_Const_null(len)) {
831 /* a memset(d, C, 0) ==> d */
832 ir_node *mem = get_Call_mem(call);
833 ir_node *dst = get_Call_param(call, 0);
835 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
836 replace_call(dst, call, mem, NULL, NULL);
840 } /* i_mapper_memset */
843 * Returns the result mode of a node.
845 static ir_mode *get_irn_res_mode(ir_node *node) {
846 switch (get_irn_opcode(node)) {
847 case iro_Load: return get_Load_mode(node);
848 case iro_Quot: return get_Quot_resmode(node);
849 case iro_Div: return get_Div_resmode(node);
850 case iro_Mod: return get_Mod_resmode(node);
851 case iro_DivMod: return get_DivMod_resmode(node);
852 default: return NULL;
854 } /* get_irn_res_mode */
856 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
858 /* A mapper for mapping unsupported instructions to runtime calls. */
859 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) {
860 int i, j, arity, first, n_param, n_res;
863 ir_node *mem, *bl, *call, *addr, *res_proj;
867 ir_mode *mode = get_irn_mode(node);
869 if (mode != rt->mode)
871 /* check if the result modes match */
872 if (mode == mode_T && rt->res_mode != NULL) {
873 mode = get_irn_res_mode(node);
874 if (mode != rt->res_mode)
878 arity = get_irn_arity(node);
882 mtp = get_entity_type(rt->ent);
883 n_param = get_method_n_params(mtp);
884 irg = current_ir_graph;
886 mem = get_irn_n(node, 0);
887 if (get_irn_mode(mem) != mode_M) {
888 mem = new_r_NoMem(irg);
893 /* check if the modes of the predecessors match the parameter modes */
894 if (arity - first != n_param)
897 for (i = first, j = 0; i < arity; ++i, ++j) {
898 ir_type *param_tp = get_method_param_type(mtp, j);
899 ir_node *pred = get_irn_n(node, i);
901 if (get_type_mode(param_tp) != get_irn_mode(pred))
905 n_res = get_method_n_ress(mtp);
907 /* step 0: calculate the number of needed Proj's */
909 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
910 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
911 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
912 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
913 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
916 if (rt->mode != mode_T) /* must be mode_T */
921 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
925 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
926 bl = get_nodes_block(node);
930 NEW_ARR_A(ir_node *, in, n_param);
931 for (i = 0; i < n_param; ++i)
932 in[i] = get_irn_n(node, first + i);
935 /* step 1: create the call */
936 sym.entity_p = rt->ent;
937 addr = new_r_SymConst(irg, bl, sym, symconst_addr_ent);
938 call = new_rd_Call(get_irn_dbg_info(node), irg, bl, mem, addr, n_param, in, mtp);
939 set_irn_pinned(call, get_irn_pinned(node));
942 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
950 turn_into_tuple(node, n_proj);
952 for (i = 0; i < n_proj; ++i)
953 set_Tuple_pred(node, i, new_r_Bad(irg));
954 if (rt->mem_proj_nr >= 0)
955 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_regular));
956 if (get_irn_op(mem) != op_NoMem) {
957 /* Exceptions can only be handled with real memory */
958 if (rt->regular_proj_nr >= 0)
959 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_regular));
960 if (rt->exc_proj_nr >= 0)
961 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_except));
962 if (rt->exc_mem_proj_nr >= 0)
963 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_except));
966 if (rt->res_proj_nr >= 0)
967 for (i = 0; i < n_res; ++i)
968 set_Tuple_pred(node, rt->res_proj_nr + i,
969 new_r_Proj(irg, bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
972 /* only one return value supported */
974 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
976 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
977 res_proj = new_r_Proj(irg, bl, res_proj, mode, 0);
979 exchange(node, res_proj);
983 /* should not happen */
985 } /* i_mapper_RuntimeCall */