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
45 #include "iropt_dbg.h"
47 /** Walker environment. */
48 typedef struct _walker_env {
49 pmap *c_map; /**< The intrinsic call map. */
50 unsigned nr_of_intrinsics; /**< statistics */
51 i_instr_record **i_map; /**< The intrinsic instruction map. */
55 * walker: call all mapper functions
57 static void call_mapper(ir_node *node, void *env) {
58 walker_env_t *wenv = env;
59 ir_op *op = get_irn_op(node);
64 const i_call_record *r;
67 symconst = get_Call_ptr(node);
68 if (! is_Global(symconst))
71 ent = get_Global_entity(symconst);
72 p = pmap_find(wenv->c_map, ent);
76 wenv->nr_of_intrinsics += r->i_mapper(node, r->ctx) ? 1 : 0;
79 if (op->code < (unsigned) ARR_LEN(wenv->i_map)) {
80 const i_instr_record *r = wenv->i_map[op->code];
81 /* run all possible mapper */
83 if (r->i_mapper(node, r->ctx)) {
84 ++wenv->nr_of_intrinsics;
93 /* Go through all graphs and map calls to intrinsic functions. */
94 unsigned lower_intrinsics(i_record *list, int length, int part_block_used) {
95 int i, n_ops = get_irp_n_opcodes();
97 pmap *c_map = pmap_create_ex(length);
98 i_instr_record **i_map;
99 unsigned nr_of_intrinsics = 0;
102 /* we use the ir_op generic pointers here */
103 NEW_ARR_A(const i_instr_record *, i_map, n_ops);
104 memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
106 /* fill a map for faster search */
107 for (i = length - 1; i >= 0; --i) {
108 if (list[i].i_call.kind == INTRINSIC_CALL) {
109 pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
111 ir_op *op = list[i].i_instr.op;
112 assert(op->code < (unsigned) ARR_LEN(i_map));
114 list[i].i_instr.link = i_map[op->code];
115 i_map[op->code] = &list[i].i_instr;
122 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
123 irg = get_irp_irg(i);
126 collect_phiprojs(irg);
128 wenv.nr_of_intrinsics = 0;
129 irg_walk_graph(irg, NULL, call_mapper, &wenv);
131 if (wenv.nr_of_intrinsics > 0) {
132 /* Changes detected: we might have added/removed nodes. */
133 set_irg_outs_inconsistent(irg);
134 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
136 /* Exception control flow might have changed / new block might have added. */
137 set_irg_doms_inconsistent(irg);
138 set_irg_extblk_inconsistent(irg);
139 set_irg_loopinfo_inconsistent(irg);
141 /* Calls might be removed/added. */
142 set_trouts_inconsistent();
145 irg_verify(irg, VRFY_NORMAL);
147 /* Optimize it, tuple might be created. */
148 optimize_graph_df(irg);
150 nr_of_intrinsics += wenv.nr_of_intrinsics;
155 return nr_of_intrinsics;
156 } /* lower_intrinsics */
159 * Helper function, replace the call by the given node.
161 * @param irn the result node
162 * @param call the call to replace
163 * @param mem the new mem result
164 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
165 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
167 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp) {
168 ir_node *block = get_nodes_block(call);
170 if (reg_jmp == NULL) {
172 /* Beware: do we need here a protection against CSE? Better we do it. */
173 int old_cse = get_opt_cse();
175 reg_jmp = new_r_Jmp(current_ir_graph, block);
176 set_opt_cse(old_cse);
179 irn = new_r_Tuple(current_ir_graph, block, 1, &irn);
181 turn_into_tuple(call, pn_Call_max);
182 set_Tuple_pred(call, pn_Call_M_regular, mem);
183 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
184 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
185 set_Tuple_pred(call, pn_Call_T_result, irn);
186 set_Tuple_pred(call, pn_Call_M_except, mem);
187 set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
190 /* A mapper for the integer abs. */
191 int i_mapper_abs(ir_node *call, void *ctx) {
192 ir_node *mem = get_Call_mem(call);
193 ir_node *block = get_nodes_block(call);
194 ir_node *op = get_Call_param(call, 0);
196 dbg_info *dbg = get_irn_dbg_info(call);
199 irn = new_rd_Abs(dbg, current_ir_graph, block, op, get_irn_mode(op));
200 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
201 replace_call(irn, call, mem, NULL, NULL);
205 /* A mapper for the alloca() function. */
206 int i_mapper_alloca(ir_node *call, void *ctx) {
207 ir_node *mem = get_Call_mem(call);
208 ir_node *block = get_nodes_block(call);
209 ir_node *op = get_Call_param(call, 0);
210 ir_node *irn, *exc, *no_exc;
211 dbg_info *dbg = get_irn_dbg_info(call);
214 if (mode_is_signed(get_irn_mode(op))) {
215 op = new_rd_Conv(dbg, current_ir_graph, block, op, mode_Iu);
218 irn = new_rd_Alloc(dbg, current_ir_graph, block, mem, op, firm_unknown_type, stack_alloc);
219 mem = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_M, pn_Alloc_M);
220 no_exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_regular);
221 exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_except);
222 irn = new_rd_Proj(dbg, current_ir_graph, block, irn, get_modeP_data(), pn_Alloc_res);
224 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
225 replace_call(irn, call, mem, no_exc, exc);
227 } /* i_mapper_alloca */
229 /* A mapper for the floating point sqrt. */
230 int i_mapper_sqrt(ir_node *call, void *ctx) {
233 ir_node *op = get_Call_param(call, 0);
239 tv = get_Const_tarval(op);
240 if (! tarval_is_null(tv) && !tarval_is_one(tv))
243 mem = get_Call_mem(call);
245 /* sqrt(0) = 0, sqrt(1) = 1 */
246 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
247 replace_call(op, call, mem, NULL, NULL);
249 } /* i_mapper_sqrt */
251 /* A mapper for the floating point cbrt. */
252 int i_mapper_cbrt(ir_node *call, void *ctx) {
255 ir_node *op = get_Call_param(call, 0);
261 tv = get_Const_tarval(op);
262 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
265 mem = get_Call_mem(call);
267 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
268 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
269 replace_call(op, call, mem, NULL, NULL);
271 } /* i_mapper_cbrt */
273 /* A mapper for the floating point pow. */
274 int i_mapper_pow(ir_node *call, void *ctx) {
277 ir_node *left = get_Call_param(call, 0);
278 ir_node *right = get_Call_param(call, 1);
279 ir_node *block = get_nodes_block(call);
280 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
283 if (is_Const(left) && is_Const_one(left)) {
284 /* pow (1.0, x) = 1.0 */
286 } else if (is_Const(right)) {
287 tarval *tv = get_Const_tarval(right);
288 if (tarval_is_null(tv)) {
289 /* pow(x, 0.0) = 1.0 */
290 ir_mode *mode = get_tarval_mode(tv);
291 irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
292 } else if (tarval_is_one(tv)) {
293 /* pow(x, 1.0) = x */
295 } else if (tarval_is_minus_one(tv)) {
296 /* pow(x, -1.0) = 1/x */
304 mem = get_Call_mem(call);
305 dbg = get_irn_dbg_info(call);
308 ir_mode *mode = get_irn_mode(left);
311 irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
312 quot = new_rd_Quot(dbg, current_ir_graph, block, mem, irn, left, mode, op_pin_state_pinned);
313 mem = new_r_Proj(current_ir_graph, block, quot, mode_M, pn_Quot_M);
314 irn = new_r_Proj(current_ir_graph, block, quot, mode, pn_Quot_res);
315 reg_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_regular);
316 exc_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_except);
318 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
319 replace_call(irn, call, mem, reg_jmp, exc_jmp);
323 /* A mapper for the floating point exp. */
324 int i_mapper_exp(ir_node *call, void *ctx) {
325 ir_node *val = get_Call_param(call, 0);
328 if (is_Const(val) && is_Const_null(val)) {
330 ir_node *block = get_nodes_block(call);
331 ir_mode *mode = get_irn_mode(val);
332 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
333 ir_node *mem = get_Call_mem(call);
334 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
335 replace_call(irn, call, mem, NULL, NULL);
342 * A mapper for mapping f(0.0) to 0.0.
344 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason) {
345 ir_node *val = get_Call_param(call, 0);
348 if (is_Const(val) && is_Const_null(val)) {
350 ir_node *mem = get_Call_mem(call);
351 DBG_OPT_ALGSIM0(call, val, reason);
352 replace_call(val, call, mem, NULL, NULL);
356 } /* i_mapper_zero_to_zero */
359 * A mapper for mapping f(1.0) to 0.0.
361 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason) {
362 ir_node *val = get_Call_param(call, 0);
365 if (is_Const(val) && is_Const_one(val)) {
366 /* acos(1.0) = 0.0 */
367 ir_node *block = get_nodes_block(call);
368 ir_mode *mode = get_irn_mode(val);
369 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
370 ir_node *mem = get_Call_mem(call);
371 DBG_OPT_ALGSIM0(call, irn, reason);
372 replace_call(irn, call, mem, NULL, NULL);
376 } /* i_mapper_one_to_zero */
379 * A mapper for mapping a functions with the following characteristics:
383 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason) {
384 ir_node *val = get_Call_param(call, 0);
387 if (is_strictConv(val)) {
388 ir_node *op = get_Conv_op(val);
390 /* f(-x) = f(x) with strictConv */
391 ir_node *block = get_nodes_block(call);
392 ir_mode *mode = get_irn_mode(val);
393 dbg_info *dbg = get_irn_dbg_info(val);
395 op = get_Minus_op(op);
396 val = new_rd_Conv(dbg, current_ir_graph, block, op, mode);
399 set_Conv_strict(val, 1);
401 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
402 set_Call_param(call, 0, val);
404 } else if (is_Minus(val)) {
406 val = get_Minus_op(val);
407 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
408 set_Call_param(call, 0, val);
411 if (is_Const(val) && is_Const_null(val)) {
413 ir_node *block = get_nodes_block(call);
414 ir_mode *mode = get_irn_mode(val);
415 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
416 ir_node *mem = get_Call_mem(call);
417 DBG_OPT_ALGSIM0(call, irn, reason);
418 replace_call(irn, call, mem, NULL, NULL);
422 } /* i_mapper_symmetric_zero_to_one */
424 /* A mapper for the floating point log. */
425 int i_mapper_log(ir_node *call, void *ctx) {
427 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
430 /* A mapper for the floating point sin. */
431 int i_mapper_sin(ir_node *call, void *ctx) {
433 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
436 /* A mapper for the floating point cos. */
437 int i_mapper_cos(ir_node *call, void *ctx) {
438 /* cos(0.0) = 1.0, cos(-x) = x */
439 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
442 /* A mapper for the floating point tan. */
443 int i_mapper_tan(ir_node *call, void *ctx) {
445 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
448 /* A mapper for the floating point asin. */
449 int i_mapper_asin(ir_node *call, void *ctx) {
450 /* asin(0.0) = 0.0 */
451 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
452 } /* i_mapper_asin */
454 /* A mapper for the floating point acos. */
455 int i_mapper_acos(ir_node *call, void *ctx) {
456 /* acos(1.0) = 0.0 */
457 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
458 } /* i_mapper_acos */
460 /* A mapper for the floating point atan. */
461 int i_mapper_atan(ir_node *call, void *ctx) {
462 /* atan(0.0) = 0.0 */
463 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
464 } /* i_mapper_atan */
466 /* A mapper for the floating point sinh. */
467 int i_mapper_sinh(ir_node *call, void *ctx) {
468 /* sinh(0.0) = 0.0 */
469 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
470 } /* i_mapper_sinh */
472 /* A mapper for the floating point cosh. */
473 int i_mapper_cosh(ir_node *call, void *ctx) {
474 /* cosh(0.0) = 1.0, cosh(-x) = x */
475 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
476 } /* i_mapper_cosh */
478 /* A mapper for the floating point tanh. */
479 int i_mapper_tanh(ir_node *call, void *ctx) {
480 /* tanh(0.0) = 0.0 */
481 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
482 } /* i_mapper_tanh */
485 * Return the const entity that is accessed through the pointer ptr or
486 * NULL if there is no entity (or the entity is not constant).
488 * @param ptr the pointer
490 static ir_entity *get_const_entity(ir_node *ptr) {
491 /* FIXME: this cannot handle constant strings inside struct initializers yet */
492 if (is_Global(ptr)) {
493 ir_entity *ent = get_Global_entity(ptr);
495 if (get_entity_variability(ent) == variability_constant) {
496 /* a constant entity */
501 } /* get_const_entity */
504 * Calculate the value of strlen if possible.
506 * @param ent the entity
507 * @param res_tp the result type
509 * @return a Const node containing the strlen() result or NULL
510 * if the evaluation fails
512 static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp) {
513 ir_type *tp = get_entity_type(ent);
517 if (! is_Array_type(tp))
519 tp = get_array_element_type(tp);
520 if (! is_Primitive_type(tp))
522 mode = get_type_mode(tp);
524 /* FIXME: This is too restrict, as the type char might be more the 8bits */
525 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
528 n = get_compound_ent_n_values(ent);
529 for (i = 0; i < n; ++i) {
530 ir_node *irn = get_compound_ent_value(ent, i);
535 if (is_Const_null(irn)) {
536 /* found the length */
542 tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
543 return new_Const_type(tv, res_tp);
548 /* A mapper for strlen */
549 int i_mapper_strlen(ir_node *call, void *ctx) {
550 ir_node *s = get_Call_param(call, 0);
551 ir_entity *ent = get_const_entity(s);
555 /* FIXME: this cannot handle constant strings inside struct initializers yet */
557 /* a constant entity */
558 ir_type *tp = get_Call_type(call);
561 tp = get_method_res_type(tp, 0);
562 irn = eval_strlen(ent, tp);
565 ir_node *mem = get_Call_mem(call);
566 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
567 replace_call(irn, call, mem, NULL, NULL);
572 } /* i_mapper_strlen */
575 * Calculate the value of strlen if possible.
577 * @param left the left entity
578 * @param right the right entity
579 * @param res_tp the result type
581 * @return a Const node containing the strcmp() result or NULL
582 * if the evaluation fails
584 static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp) {
589 tp = get_entity_type(left);
590 if (! is_Array_type(tp))
592 tp = get_array_element_type(tp);
593 if (! is_Primitive_type(tp))
595 mode = get_type_mode(tp);
597 /* FIXME: This is too restrict, as the type char might be more the 8bits */
598 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
601 tp = get_entity_type(right);
602 if (! is_Array_type(tp))
604 tp = get_array_element_type(tp);
605 if (! is_Primitive_type(tp))
607 mode = get_type_mode(tp);
609 /* FIXME: This is too restrict, as the type char might be more the 8bits */
610 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
613 n = get_compound_ent_n_values(left);
614 n_r = get_compound_ent_n_values(right);
617 for (i = 0; i < n; ++i) {
622 irn = get_compound_ent_value(left, i);
625 tv = get_Const_tarval(irn);
626 v_l = get_tarval_long(tv);
628 irn = get_compound_ent_value(right, i);
631 tv = get_Const_tarval(irn);
632 v_r = get_tarval_long(tv);
649 /* we found an end */
650 tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
651 return new_Const_type(tv, res_tp);
657 * Checks if an entity represents the empty string.
659 * @param ent the entity
661 * @return non-zero if ent represents the empty string
663 static int is_empty_string(ir_entity *ent) {
664 ir_type *tp = get_entity_type(ent);
669 if (! is_Array_type(tp))
671 tp = get_array_element_type(tp);
672 if (! is_Primitive_type(tp))
674 mode = get_type_mode(tp);
676 /* FIXME: This is too restrict, as the type char might be more the 8bits */
677 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
680 n = get_compound_ent_n_values(ent);
683 irn = get_compound_ent_value(ent, 0);
685 return is_Const(irn) && is_Const_null(irn);
686 } /* is_empty_string */
688 /* A mapper for strcmp */
689 int i_mapper_strcmp(ir_node *call, void *ctx) {
690 ir_node *left = get_Call_param(call, 0);
691 ir_node *right = get_Call_param(call, 1);
695 ir_type *call_tp = get_Call_type(call);
696 ir_type *res_tp = get_method_res_type(call_tp, 0);
697 ir_entity *ent_l, *ent_r;
703 /* do some type checks first */
704 if (! is_Primitive_type(res_tp))
706 char_tp = get_method_param_type(call_tp, 0);
707 if (char_tp != get_method_param_type(call_tp, 1))
709 if (! is_Pointer_type(char_tp))
711 char_tp = get_pointer_points_to_type(char_tp);
714 /* a strcmp(s, s) ==> 0 */
715 ir_node *mem = get_Call_mem(call);
716 ir_mode *mode = get_type_mode(res_tp);
717 ir_node *block = get_nodes_block(call);
719 irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
720 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
721 replace_call(irn, call, mem, NULL, NULL);
724 ent_l = get_const_entity(left);
725 ent_r = get_const_entity(right);
727 if (ent_l != NULL && ent_r != NULL) {
728 /* both entities are const, try to evaluate */
729 irn = eval_strcmp(ent_l, ent_r, res_tp);
730 } else if (ent_l != NULL) {
731 if (is_empty_string(ent_l)) {
732 /* s strcmp("", s) ==> -(*s)*/
734 goto replace_by_call;
736 } else if (ent_r != NULL) {
737 if (is_empty_string(ent_r)) {
738 /* s strcmp(s, "") ==> (*s) */
739 ir_node *mem, *block;
745 mem = get_Call_mem(call);
746 block = get_nodes_block(call);
747 dbg = get_irn_dbg_info(call);
748 mode = get_type_mode(char_tp);
750 /* replace the strcmp by (*x) */
751 irn = new_rd_Load(dbg, current_ir_graph, block, mem, v, mode);
752 mem = new_r_Proj(current_ir_graph, block, irn, mode_M, pn_Load_M);
753 exc = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_except);
754 reg = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_regular);
755 irn = new_r_Proj(current_ir_graph, block, irn, mode, pn_Load_res);
757 /* conv to the result mode */
758 mode = get_type_mode(res_tp);
759 irn = new_rd_Conv(dbg, current_ir_graph, block, irn, mode);
762 /* negate in the ("", s) case */
763 irn = new_rd_Minus(dbg, current_ir_graph, block, irn, mode);
769 ir_node *mem = get_Call_mem(call);
770 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
771 replace_call(irn, call, mem, reg, exc);
776 } /* i_mapper_strcmp */
778 /* A mapper for strncmp */
779 int i_mapper_strncmp(ir_node *call, void *ctx) {
780 ir_node *left = get_Call_param(call, 0);
781 ir_node *right = get_Call_param(call, 1);
782 ir_node *len = get_Call_param(call, 2);
786 if (left == right || (is_Const(len) && is_Const_null(len))) {
787 /* a strncmp(s, s, len) ==> 0 OR
788 a strncmp(a, b, 0) ==> 0 */
789 ir_node *mem = get_Call_mem(call);
790 ir_node *adr = get_Call_ptr(call);
791 ir_entity *ent = get_SymConst_entity(adr);
792 ir_type *call_tp = get_entity_type(ent);
793 ir_type *res_tp = get_method_res_type(call_tp, 0);
794 ir_mode *mode = get_type_mode(res_tp);
795 ir_node *block = get_nodes_block(call);
797 irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
798 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
799 replace_call(irn, call, mem, NULL, NULL);
803 } /* i_mapper_strncmp */
805 /* A mapper for memcpy */
806 int i_mapper_memcpy(ir_node *call, void *ctx) {
807 ir_node *len = get_Call_param(call, 2);
810 if (is_Const(len) && is_Const_null(len)) {
811 /* a memcpy(d, s, 0) ==> d */
812 ir_node *mem = get_Call_mem(call);
813 ir_node *dst = get_Call_param(call, 0);
815 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
816 replace_call(dst, call, mem, NULL, NULL);
820 } /* i_mapper_memcpy */
822 /* A mapper for memset */
823 int i_mapper_memset(ir_node *call, void *ctx) {
824 ir_node *len = get_Call_param(call, 2);
827 if (is_Const(len) && is_Const_null(len)) {
828 /* a memset(d, C, 0) ==> d */
829 ir_node *mem = get_Call_mem(call);
830 ir_node *dst = get_Call_param(call, 0);
832 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
833 replace_call(dst, call, mem, NULL, NULL);
837 } /* i_mapper_memset */
840 * Returns the result mode of a node.
842 static ir_mode *get_irn_res_mode(ir_node *node) {
843 switch (get_irn_opcode(node)) {
844 case iro_Load: return get_Load_mode(node);
845 case iro_Quot: return get_Quot_resmode(node);
846 case iro_Div: return get_Div_resmode(node);
847 case iro_Mod: return get_Mod_resmode(node);
848 case iro_DivMod: return get_DivMod_resmode(node);
849 default: return NULL;
851 } /* get_irn_res_mode */
853 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
855 /* A mapper for mapping unsupported instructions to runtime calls. */
856 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) {
857 int i, j, arity, first, n_param, n_res;
860 ir_node *mem, *bl, *call, *addr, *res_proj;
864 ir_mode *mode = get_irn_mode(node);
866 if (mode != rt->mode)
868 /* check if the result modes match */
869 if (mode == mode_T && rt->res_mode != NULL) {
870 mode = get_irn_res_mode(node);
871 if (mode != rt->res_mode)
875 arity = get_irn_arity(node);
879 mtp = get_entity_type(rt->ent);
880 n_param = get_method_n_params(mtp);
881 irg = current_ir_graph;
883 mem = get_irn_n(node, 0);
884 if (get_irn_mode(mem) != mode_M) {
885 mem = new_r_NoMem(irg);
890 /* check if the modes of the predecessors match the parameter modes */
891 if (arity - first != n_param)
894 for (i = first, j = 0; i < arity; ++i, ++j) {
895 ir_type *param_tp = get_method_param_type(mtp, j);
896 ir_node *pred = get_irn_n(node, i);
898 if (get_type_mode(param_tp) != get_irn_mode(pred))
902 n_res = get_method_n_ress(mtp);
904 /* step 0: calculate the number of needed Proj's */
906 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
907 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
908 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
909 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
910 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
913 if (rt->mode != mode_T) /* must be mode_T */
918 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
922 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
923 bl = get_nodes_block(node);
927 NEW_ARR_A(ir_node *, in, n_param);
928 for (i = 0; i < n_param; ++i)
929 in[i] = get_irn_n(node, first + i);
932 /* step 1: create the call */
933 sym.entity_p = rt->ent;
934 addr = new_r_SymConst(irg, bl, mode_P_code, sym, symconst_addr_ent);
935 call = new_rd_Call(get_irn_dbg_info(node), irg, bl, mem, addr, n_param, in, mtp);
936 set_irn_pinned(call, get_irn_pinned(node));
939 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
947 turn_into_tuple(node, n_proj);
949 for (i = 0; i < n_proj; ++i)
950 set_Tuple_pred(node, i, new_r_Bad(irg));
951 if (rt->mem_proj_nr >= 0)
952 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_regular));
953 if (!is_NoMem(mem)) {
954 /* Exceptions can only be handled with real memory */
955 if (rt->regular_proj_nr >= 0)
956 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_regular));
957 if (rt->exc_proj_nr >= 0)
958 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_except));
959 if (rt->exc_mem_proj_nr >= 0)
960 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_except));
963 if (rt->res_proj_nr >= 0)
964 for (i = 0; i < n_res; ++i)
965 set_Tuple_pred(node, rt->res_proj_nr + i,
966 new_r_Proj(irg, bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
969 /* only one return value supported */
971 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
973 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
974 res_proj = new_r_Proj(irg, bl, res_proj, mode, 0);
976 exchange(node, res_proj);
980 /* should not happen */
982 } /* i_mapper_RuntimeCall */