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"
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 (! is_Global(symconst))
69 ent = get_Global_entity(symconst);
70 p = pmap_find(wenv->c_map, ent);
74 wenv->nr_of_intrinsics += r->i_mapper(node, r->ctx) ? 1 : 0;
77 if (op->code < (unsigned) ARR_LEN(wenv->i_map)) {
78 const i_instr_record *r = wenv->i_map[op->code];
79 /* run all possible mapper */
81 if (r->i_mapper(node, r->ctx)) {
82 ++wenv->nr_of_intrinsics;
91 /* Go through all graphs and map calls to intrinsic functions. */
92 unsigned lower_intrinsics(i_record *list, int length, int part_block_used) {
93 int i, n_ops = get_irp_n_opcodes();
95 pmap *c_map = pmap_create_ex(length);
96 i_instr_record **i_map;
97 unsigned nr_of_intrinsics = 0;
100 /* we use the ir_op generic pointers here */
101 NEW_ARR_A(const i_instr_record *, i_map, n_ops);
102 memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
104 /* fill a map for faster search */
105 for (i = length - 1; i >= 0; --i) {
106 if (list[i].i_call.kind == INTRINSIC_CALL) {
107 pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
109 ir_op *op = list[i].i_instr.op;
110 assert(op->code < (unsigned) ARR_LEN(i_map));
112 list[i].i_instr.link = i_map[op->code];
113 i_map[op->code] = &list[i].i_instr;
120 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
121 irg = get_irp_irg(i);
123 if (part_block_used) {
124 ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
125 collect_phiprojs(irg);
128 wenv.nr_of_intrinsics = 0;
129 irg_walk_graph(irg, NULL, call_mapper, &wenv);
132 ir_free_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
134 if (wenv.nr_of_intrinsics > 0) {
135 /* Changes detected: we might have added/removed nodes. */
136 set_irg_outs_inconsistent(irg);
137 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
139 /* Exception control flow might have changed / new block might have added. */
140 set_irg_doms_inconsistent(irg);
141 set_irg_extblk_inconsistent(irg);
142 set_irg_loopinfo_inconsistent(irg);
144 /* Calls might be removed/added. */
145 set_trouts_inconsistent();
148 irg_verify(irg, VRFY_NORMAL);
150 /* Optimize it, tuple might be created. */
151 optimize_graph_df(irg);
153 nr_of_intrinsics += wenv.nr_of_intrinsics;
158 return nr_of_intrinsics;
159 } /* lower_intrinsics */
162 * Helper function, replace the call by the given node.
164 * @param irn the result node
165 * @param call the call to replace
166 * @param mem the new mem result
167 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
168 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
170 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp) {
171 ir_node *block = get_nodes_block(call);
173 if (reg_jmp == NULL) {
175 /* Beware: do we need here a protection against CSE? Better we do it. */
176 int old_cse = get_opt_cse();
178 reg_jmp = new_r_Jmp(current_ir_graph, block);
179 set_opt_cse(old_cse);
182 irn = new_r_Tuple(current_ir_graph, block, 1, &irn);
184 turn_into_tuple(call, pn_Call_max);
185 set_Tuple_pred(call, pn_Call_M_regular, mem);
186 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
187 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
188 set_Tuple_pred(call, pn_Call_T_result, irn);
189 set_Tuple_pred(call, pn_Call_M_except, mem);
190 set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
193 /* A mapper for the integer abs. */
194 int i_mapper_abs(ir_node *call, void *ctx) {
195 ir_node *mem = get_Call_mem(call);
196 ir_node *block = get_nodes_block(call);
197 ir_node *op = get_Call_param(call, 0);
199 dbg_info *dbg = get_irn_dbg_info(call);
202 irn = new_rd_Abs(dbg, current_ir_graph, block, op, get_irn_mode(op));
203 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
204 replace_call(irn, call, mem, NULL, NULL);
208 /* A mapper for the alloca() function. */
209 int i_mapper_alloca(ir_node *call, void *ctx) {
210 ir_node *mem = get_Call_mem(call);
211 ir_node *block = get_nodes_block(call);
212 ir_node *op = get_Call_param(call, 0);
213 ir_node *irn, *exc, *no_exc;
214 dbg_info *dbg = get_irn_dbg_info(call);
217 if (mode_is_signed(get_irn_mode(op))) {
218 ir_mode *mode = get_irn_mode(op);
219 mode = find_unsigned_mode(mode);
221 panic("Cannot find unsigned mode for %M", mode);
223 op = new_rd_Conv(dbg, current_ir_graph, block, op, mode);
226 irn = new_rd_Alloc(dbg, current_ir_graph, block, mem, op, firm_unknown_type, stack_alloc);
227 mem = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_M, pn_Alloc_M);
228 no_exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_regular);
229 exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_except);
230 irn = new_rd_Proj(dbg, current_ir_graph, block, irn, get_modeP_data(), pn_Alloc_res);
232 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
233 replace_call(irn, call, mem, no_exc, exc);
235 } /* i_mapper_alloca */
237 /* A mapper for the floating point sqrt. */
238 int i_mapper_sqrt(ir_node *call, void *ctx) {
241 ir_node *op = get_Call_param(call, 0);
247 tv = get_Const_tarval(op);
248 if (! tarval_is_null(tv) && !tarval_is_one(tv))
251 mem = get_Call_mem(call);
253 /* sqrt(0) = 0, sqrt(1) = 1 */
254 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
255 replace_call(op, call, mem, NULL, NULL);
257 } /* i_mapper_sqrt */
259 /* A mapper for the floating point cbrt. */
260 int i_mapper_cbrt(ir_node *call, void *ctx) {
263 ir_node *op = get_Call_param(call, 0);
269 tv = get_Const_tarval(op);
270 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
273 mem = get_Call_mem(call);
275 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
276 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
277 replace_call(op, call, mem, NULL, NULL);
279 } /* i_mapper_cbrt */
281 /* A mapper for the floating point pow. */
282 int i_mapper_pow(ir_node *call, void *ctx) {
285 ir_node *left = get_Call_param(call, 0);
286 ir_node *right = get_Call_param(call, 1);
287 ir_node *block = get_nodes_block(call);
288 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
291 if (is_Const(left) && is_Const_one(left)) {
292 /* pow (1.0, x) = 1.0 */
294 } else if (is_Const(right)) {
295 tarval *tv = get_Const_tarval(right);
296 if (tarval_is_null(tv)) {
297 /* pow(x, 0.0) = 1.0 */
298 ir_mode *mode = get_tarval_mode(tv);
299 irn = new_Const(get_mode_one(mode));
300 } else if (tarval_is_one(tv)) {
301 /* pow(x, 1.0) = x */
303 } else if (tarval_is_minus_one(tv)) {
304 /* pow(x, -1.0) = 1/x */
312 mem = get_Call_mem(call);
313 dbg = get_irn_dbg_info(call);
316 ir_mode *mode = get_irn_mode(left);
319 irn = new_Const(get_mode_one(mode));
320 quot = new_rd_Quot(dbg, current_ir_graph, block, mem, irn, left, mode, op_pin_state_pinned);
321 mem = new_r_Proj(current_ir_graph, block, quot, mode_M, pn_Quot_M);
322 irn = new_r_Proj(current_ir_graph, block, quot, mode, pn_Quot_res);
323 reg_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_regular);
324 exc_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_except);
326 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
327 replace_call(irn, call, mem, reg_jmp, exc_jmp);
331 /* A mapper for the floating point exp. */
332 int i_mapper_exp(ir_node *call, void *ctx) {
333 ir_node *val = get_Call_param(call, 0);
336 if (is_Const(val) && is_Const_null(val)) {
338 ir_mode *mode = get_irn_mode(val);
339 ir_node *irn = new_Const(get_mode_one(mode));
340 ir_node *mem = get_Call_mem(call);
341 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
342 replace_call(irn, call, mem, NULL, NULL);
349 * A mapper for mapping f(0.0) to 0.0.
351 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason) {
352 ir_node *val = get_Call_param(call, 0);
355 if (is_Const(val) && is_Const_null(val)) {
357 ir_node *mem = get_Call_mem(call);
358 DBG_OPT_ALGSIM0(call, val, reason);
359 replace_call(val, call, mem, NULL, NULL);
363 } /* i_mapper_zero_to_zero */
366 * A mapper for mapping f(1.0) to 0.0.
368 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason) {
369 ir_node *val = get_Call_param(call, 0);
372 if (is_Const(val) && is_Const_one(val)) {
373 /* acos(1.0) = 0.0 */
374 ir_mode *mode = get_irn_mode(val);
375 ir_node *irn = new_Const(get_mode_null(mode));
376 ir_node *mem = get_Call_mem(call);
377 DBG_OPT_ALGSIM0(call, irn, reason);
378 replace_call(irn, call, mem, NULL, NULL);
382 } /* i_mapper_one_to_zero */
385 * A mapper for mapping a functions with the following characteristics:
389 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason) {
390 ir_node *val = get_Call_param(call, 0);
393 if (is_strictConv(val)) {
394 ir_node *op = get_Conv_op(val);
396 /* f(-x) = f(x) with strictConv */
397 ir_node *block = get_nodes_block(call);
398 ir_mode *mode = get_irn_mode(val);
399 dbg_info *dbg = get_irn_dbg_info(val);
401 op = get_Minus_op(op);
402 val = new_rd_Conv(dbg, current_ir_graph, block, op, mode);
405 set_Conv_strict(val, 1);
407 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
408 set_Call_param(call, 0, val);
410 } else if (is_Minus(val)) {
412 val = get_Minus_op(val);
413 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
414 set_Call_param(call, 0, val);
417 if (is_Const(val) && is_Const_null(val)) {
419 ir_mode *mode = get_irn_mode(val);
420 ir_node *irn = new_Const(get_mode_one(mode));
421 ir_node *mem = get_Call_mem(call);
422 DBG_OPT_ALGSIM0(call, irn, reason);
423 replace_call(irn, call, mem, NULL, NULL);
427 } /* i_mapper_symmetric_zero_to_one */
429 /* A mapper for the floating point log. */
430 int i_mapper_log(ir_node *call, void *ctx) {
432 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
435 /* A mapper for the floating point sin. */
436 int i_mapper_sin(ir_node *call, void *ctx) {
438 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
441 /* A mapper for the floating point cos. */
442 int i_mapper_cos(ir_node *call, void *ctx) {
443 /* cos(0.0) = 1.0, cos(-x) = x */
444 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
447 /* A mapper for the floating point tan. */
448 int i_mapper_tan(ir_node *call, void *ctx) {
450 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
453 /* A mapper for the floating point asin. */
454 int i_mapper_asin(ir_node *call, void *ctx) {
455 /* asin(0.0) = 0.0 */
456 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
457 } /* i_mapper_asin */
459 /* A mapper for the floating point acos. */
460 int i_mapper_acos(ir_node *call, void *ctx) {
461 /* acos(1.0) = 0.0 */
462 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
463 } /* i_mapper_acos */
465 /* A mapper for the floating point atan. */
466 int i_mapper_atan(ir_node *call, void *ctx) {
467 /* atan(0.0) = 0.0 */
468 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
469 } /* i_mapper_atan */
471 /* A mapper for the floating point sinh. */
472 int i_mapper_sinh(ir_node *call, void *ctx) {
473 /* sinh(0.0) = 0.0 */
474 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
475 } /* i_mapper_sinh */
477 /* A mapper for the floating point cosh. */
478 int i_mapper_cosh(ir_node *call, void *ctx) {
479 /* cosh(0.0) = 1.0, cosh(-x) = x */
480 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
481 } /* i_mapper_cosh */
483 /* A mapper for the floating point tanh. */
484 int i_mapper_tanh(ir_node *call, void *ctx) {
485 /* tanh(0.0) = 0.0 */
486 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
487 } /* i_mapper_tanh */
490 * Return the const entity that is accessed through the pointer ptr or
491 * NULL if there is no entity (or the entity is not constant).
493 * @param ptr the pointer
495 static ir_entity *get_const_entity(ir_node *ptr) {
496 /* FIXME: this cannot handle constant strings inside struct initializers yet */
497 if (is_Global(ptr)) {
498 ir_entity *ent = get_Global_entity(ptr);
500 if (get_entity_variability(ent) == variability_constant) {
501 /* a constant entity */
506 } /* get_const_entity */
509 * Calculate the value of strlen if possible.
511 * @param ent the entity
512 * @param res_tp the result type
514 * @return a Const node containing the strlen() result or NULL
515 * if the evaluation fails
517 static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp) {
518 ir_type *tp = get_entity_type(ent);
522 if (! is_Array_type(tp))
524 tp = get_array_element_type(tp);
525 if (! is_Primitive_type(tp))
527 mode = get_type_mode(tp);
529 /* FIXME: This is too restrict, as the type char might be more the 8bits */
530 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
533 n = get_compound_ent_n_values(ent);
534 for (i = 0; i < n; ++i) {
535 ir_node *irn = get_compound_ent_value(ent, i);
540 if (is_Const_null(irn)) {
541 /* found the length */
547 tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
548 return new_Const_type(tv, res_tp);
553 /* A mapper for strlen */
554 int i_mapper_strlen(ir_node *call, void *ctx) {
555 ir_node *s = get_Call_param(call, 0);
556 ir_entity *ent = get_const_entity(s);
560 /* FIXME: this cannot handle constant strings inside struct initializers yet */
562 /* a constant entity */
563 ir_type *tp = get_Call_type(call);
566 tp = get_method_res_type(tp, 0);
567 irn = eval_strlen(ent, tp);
570 ir_node *mem = get_Call_mem(call);
571 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
572 replace_call(irn, call, mem, NULL, NULL);
577 } /* i_mapper_strlen */
580 * Calculate the value of strlen if possible.
582 * @param left the left entity
583 * @param right the right entity
584 * @param res_tp the result type
586 * @return a Const node containing the strcmp() result or NULL
587 * if the evaluation fails
589 static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp) {
594 tp = get_entity_type(left);
595 if (! is_Array_type(tp))
597 tp = get_array_element_type(tp);
598 if (! is_Primitive_type(tp))
600 mode = get_type_mode(tp);
602 /* FIXME: This is too restrict, as the type char might be more the 8bits */
603 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
606 tp = get_entity_type(right);
607 if (! is_Array_type(tp))
609 tp = get_array_element_type(tp);
610 if (! is_Primitive_type(tp))
612 mode = get_type_mode(tp);
614 /* FIXME: This is too restrict, as the type char might be more the 8bits */
615 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
618 n = get_compound_ent_n_values(left);
619 n_r = get_compound_ent_n_values(right);
622 for (i = 0; i < n; ++i) {
627 irn = get_compound_ent_value(left, i);
630 tv = get_Const_tarval(irn);
631 v_l = get_tarval_long(tv);
633 irn = get_compound_ent_value(right, i);
636 tv = get_Const_tarval(irn);
637 v_r = get_tarval_long(tv);
654 /* we found an end */
655 tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
656 return new_Const_type(tv, res_tp);
662 * Checks if an entity represents the empty string.
664 * @param ent the entity
666 * @return non-zero if ent represents the empty string
668 static int is_empty_string(ir_entity *ent) {
669 ir_type *tp = get_entity_type(ent);
674 if (! is_Array_type(tp))
676 tp = get_array_element_type(tp);
677 if (! is_Primitive_type(tp))
679 mode = get_type_mode(tp);
681 /* FIXME: This is too restrict, as the type char might be more the 8bits */
682 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
685 n = get_compound_ent_n_values(ent);
688 irn = get_compound_ent_value(ent, 0);
690 return is_Const(irn) && is_Const_null(irn);
691 } /* is_empty_string */
693 /* A mapper for strcmp */
694 int i_mapper_strcmp(ir_node *call, void *ctx) {
695 ir_node *left = get_Call_param(call, 0);
696 ir_node *right = get_Call_param(call, 1);
700 ir_type *call_tp = get_Call_type(call);
701 ir_type *res_tp = get_method_res_type(call_tp, 0);
702 ir_entity *ent_l, *ent_r;
708 /* do some type checks first */
709 if (! is_Primitive_type(res_tp))
711 char_tp = get_method_param_type(call_tp, 0);
712 if (char_tp != get_method_param_type(call_tp, 1))
714 if (! is_Pointer_type(char_tp))
716 char_tp = get_pointer_points_to_type(char_tp);
719 /* a strcmp(s, s) ==> 0 */
720 ir_node *mem = get_Call_mem(call);
721 ir_mode *mode = get_type_mode(res_tp);
723 irn = new_Const(get_mode_null(mode));
724 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
725 replace_call(irn, call, mem, NULL, NULL);
728 ent_l = get_const_entity(left);
729 ent_r = get_const_entity(right);
731 if (ent_l != NULL && ent_r != NULL) {
732 /* both entities are const, try to evaluate */
733 irn = eval_strcmp(ent_l, ent_r, res_tp);
734 } else if (ent_l != NULL) {
735 if (is_empty_string(ent_l)) {
736 /* s strcmp("", s) ==> -(*s)*/
738 goto replace_by_call;
740 } else if (ent_r != NULL) {
741 if (is_empty_string(ent_r)) {
742 /* s strcmp(s, "") ==> (*s) */
743 ir_node *mem, *block;
749 mem = get_Call_mem(call);
750 block = get_nodes_block(call);
751 dbg = get_irn_dbg_info(call);
752 mode = get_type_mode(char_tp);
754 /* replace the strcmp by (*x) */
755 irn = new_rd_Load(dbg, current_ir_graph, block, mem, v, mode, 0);
756 mem = new_r_Proj(current_ir_graph, block, irn, mode_M, pn_Load_M);
757 exc = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_except);
758 reg = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_regular);
759 irn = new_r_Proj(current_ir_graph, block, irn, mode, pn_Load_res);
761 /* conv to the result mode */
762 mode = get_type_mode(res_tp);
763 irn = new_rd_Conv(dbg, current_ir_graph, block, irn, mode);
766 /* negate in the ("", s) case */
767 irn = new_rd_Minus(dbg, current_ir_graph, block, irn, mode);
773 ir_node *mem = get_Call_mem(call);
774 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
775 replace_call(irn, call, mem, reg, exc);
780 } /* i_mapper_strcmp */
782 /* A mapper for strncmp */
783 int i_mapper_strncmp(ir_node *call, void *ctx) {
784 ir_node *left = get_Call_param(call, 0);
785 ir_node *right = get_Call_param(call, 1);
786 ir_node *len = get_Call_param(call, 2);
790 if (left == right || (is_Const(len) && is_Const_null(len))) {
791 /* a strncmp(s, s, len) ==> 0 OR
792 a strncmp(a, b, 0) ==> 0 */
793 ir_node *mem = get_Call_mem(call);
794 ir_node *adr = get_Call_ptr(call);
795 ir_entity *ent = get_SymConst_entity(adr);
796 ir_type *call_tp = get_entity_type(ent);
797 ir_type *res_tp = get_method_res_type(call_tp, 0);
798 ir_mode *mode = get_type_mode(res_tp);
800 irn = new_Const(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, mode_P_code, 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 (!is_NoMem(mem)) {
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 */