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 integer bswap. */
209 int i_mapper_bswap(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_type *tp = get_Call_type(call);
214 dbg_info *dbg = get_irn_dbg_info(call);
218 irn = new_rd_Builtin(dbg, current_ir_graph, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
219 set_irn_pinned(irn, op_pin_state_floats);
220 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
221 irn = new_r_Proj(current_ir_graph, block, irn, get_irn_mode(op), pn_Builtin_1_result);
222 replace_call(irn, call, mem, NULL, NULL);
224 } /* i_mapper_bswap */
226 /* A mapper for the alloca() function. */
227 int i_mapper_alloca(ir_node *call, void *ctx) {
228 ir_node *mem = get_Call_mem(call);
229 ir_node *block = get_nodes_block(call);
230 ir_node *op = get_Call_param(call, 0);
231 ir_node *irn, *exc, *no_exc;
232 dbg_info *dbg = get_irn_dbg_info(call);
235 if (mode_is_signed(get_irn_mode(op))) {
236 ir_mode *mode = get_irn_mode(op);
237 mode = find_unsigned_mode(mode);
239 panic("Cannot find unsigned mode for %M", mode);
241 op = new_rd_Conv(dbg, current_ir_graph, block, op, mode);
244 irn = new_rd_Alloc(dbg, current_ir_graph, block, mem, op, firm_unknown_type, stack_alloc);
245 mem = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_M, pn_Alloc_M);
246 no_exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_regular);
247 exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_except);
248 irn = new_rd_Proj(dbg, current_ir_graph, block, irn, get_modeP_data(), pn_Alloc_res);
250 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
251 replace_call(irn, call, mem, no_exc, exc);
253 } /* i_mapper_alloca */
255 /* A mapper for the floating point sqrt. */
256 int i_mapper_sqrt(ir_node *call, void *ctx) {
259 ir_node *op = get_Call_param(call, 0);
265 tv = get_Const_tarval(op);
266 if (! tarval_is_null(tv) && !tarval_is_one(tv))
269 mem = get_Call_mem(call);
271 /* sqrt(0) = 0, sqrt(1) = 1 */
272 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
273 replace_call(op, call, mem, NULL, NULL);
275 } /* i_mapper_sqrt */
277 /* A mapper for the floating point cbrt. */
278 int i_mapper_cbrt(ir_node *call, void *ctx) {
281 ir_node *op = get_Call_param(call, 0);
287 tv = get_Const_tarval(op);
288 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
291 mem = get_Call_mem(call);
293 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
294 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
295 replace_call(op, call, mem, NULL, NULL);
297 } /* i_mapper_cbrt */
299 /* A mapper for the floating point pow. */
300 int i_mapper_pow(ir_node *call, void *ctx) {
303 ir_node *left = get_Call_param(call, 0);
304 ir_node *right = get_Call_param(call, 1);
305 ir_node *block = get_nodes_block(call);
306 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
309 if (is_Const(left) && is_Const_one(left)) {
310 /* pow (1.0, x) = 1.0 */
312 } else if (is_Const(right)) {
313 tarval *tv = get_Const_tarval(right);
314 if (tarval_is_null(tv)) {
315 /* pow(x, 0.0) = 1.0 */
316 ir_mode *mode = get_tarval_mode(tv);
317 irn = new_Const(get_mode_one(mode));
318 } else if (tarval_is_one(tv)) {
319 /* pow(x, 1.0) = x */
321 } else if (tarval_is_minus_one(tv)) {
322 /* pow(x, -1.0) = 1/x */
330 mem = get_Call_mem(call);
331 dbg = get_irn_dbg_info(call);
334 ir_mode *mode = get_irn_mode(left);
337 irn = new_Const(get_mode_one(mode));
338 quot = new_rd_Quot(dbg, current_ir_graph, block, mem, irn, left, mode, op_pin_state_pinned);
339 mem = new_r_Proj(current_ir_graph, block, quot, mode_M, pn_Quot_M);
340 irn = new_r_Proj(current_ir_graph, block, quot, mode, pn_Quot_res);
341 reg_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_regular);
342 exc_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_except);
344 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
345 replace_call(irn, call, mem, reg_jmp, exc_jmp);
349 /* A mapper for the floating point exp. */
350 int i_mapper_exp(ir_node *call, void *ctx) {
351 ir_node *val = get_Call_param(call, 0);
354 if (is_Const(val) && is_Const_null(val)) {
356 ir_mode *mode = get_irn_mode(val);
357 ir_node *irn = new_Const(get_mode_one(mode));
358 ir_node *mem = get_Call_mem(call);
359 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
360 replace_call(irn, call, mem, NULL, NULL);
367 * A mapper for mapping f(0.0) to 0.0.
369 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason) {
370 ir_node *val = get_Call_param(call, 0);
373 if (is_Const(val) && is_Const_null(val)) {
375 ir_node *mem = get_Call_mem(call);
376 DBG_OPT_ALGSIM0(call, val, reason);
377 replace_call(val, call, mem, NULL, NULL);
381 } /* i_mapper_zero_to_zero */
384 * A mapper for mapping f(1.0) to 0.0.
386 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason) {
387 ir_node *val = get_Call_param(call, 0);
390 if (is_Const(val) && is_Const_one(val)) {
391 /* acos(1.0) = 0.0 */
392 ir_mode *mode = get_irn_mode(val);
393 ir_node *irn = new_Const(get_mode_null(mode));
394 ir_node *mem = get_Call_mem(call);
395 DBG_OPT_ALGSIM0(call, irn, reason);
396 replace_call(irn, call, mem, NULL, NULL);
400 } /* i_mapper_one_to_zero */
403 * A mapper for mapping a functions with the following characteristics:
407 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason) {
408 ir_node *val = get_Call_param(call, 0);
411 if (is_strictConv(val)) {
412 ir_node *op = get_Conv_op(val);
414 /* f(-x) = f(x) with strictConv */
415 ir_node *block = get_nodes_block(call);
416 ir_mode *mode = get_irn_mode(val);
417 dbg_info *dbg = get_irn_dbg_info(val);
419 op = get_Minus_op(op);
420 val = new_rd_Conv(dbg, current_ir_graph, block, op, mode);
423 set_Conv_strict(val, 1);
425 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
426 set_Call_param(call, 0, val);
428 } else if (is_Minus(val)) {
430 val = get_Minus_op(val);
431 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
432 set_Call_param(call, 0, val);
435 if (is_Const(val) && is_Const_null(val)) {
437 ir_mode *mode = get_irn_mode(val);
438 ir_node *irn = new_Const(get_mode_one(mode));
439 ir_node *mem = get_Call_mem(call);
440 DBG_OPT_ALGSIM0(call, irn, reason);
441 replace_call(irn, call, mem, NULL, NULL);
445 } /* i_mapper_symmetric_zero_to_one */
447 /* A mapper for the floating point log. */
448 int i_mapper_log(ir_node *call, void *ctx) {
450 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
453 /* A mapper for the floating point sin. */
454 int i_mapper_sin(ir_node *call, void *ctx) {
456 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
459 /* A mapper for the floating point cos. */
460 int i_mapper_cos(ir_node *call, void *ctx) {
461 /* cos(0.0) = 1.0, cos(-x) = x */
462 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
465 /* A mapper for the floating point tan. */
466 int i_mapper_tan(ir_node *call, void *ctx) {
468 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
471 /* A mapper for the floating point asin. */
472 int i_mapper_asin(ir_node *call, void *ctx) {
473 /* asin(0.0) = 0.0 */
474 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
475 } /* i_mapper_asin */
477 /* A mapper for the floating point acos. */
478 int i_mapper_acos(ir_node *call, void *ctx) {
479 /* acos(1.0) = 0.0 */
480 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
481 } /* i_mapper_acos */
483 /* A mapper for the floating point atan. */
484 int i_mapper_atan(ir_node *call, void *ctx) {
485 /* atan(0.0) = 0.0 */
486 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
487 } /* i_mapper_atan */
489 /* A mapper for the floating point sinh. */
490 int i_mapper_sinh(ir_node *call, void *ctx) {
491 /* sinh(0.0) = 0.0 */
492 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
493 } /* i_mapper_sinh */
495 /* A mapper for the floating point cosh. */
496 int i_mapper_cosh(ir_node *call, void *ctx) {
497 /* cosh(0.0) = 1.0, cosh(-x) = x */
498 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
499 } /* i_mapper_cosh */
501 /* A mapper for the floating point tanh. */
502 int i_mapper_tanh(ir_node *call, void *ctx) {
503 /* tanh(0.0) = 0.0 */
504 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
505 } /* i_mapper_tanh */
508 * Return the const entity that is accessed through the pointer ptr or
509 * NULL if there is no entity (or the entity is not constant).
511 * @param ptr the pointer
513 static ir_entity *get_const_entity(ir_node *ptr) {
514 /* FIXME: this cannot handle constant strings inside struct initializers yet */
515 if (is_Global(ptr)) {
516 ir_entity *ent = get_Global_entity(ptr);
518 if (get_entity_variability(ent) == variability_constant) {
519 /* a constant entity */
524 } /* get_const_entity */
527 * Calculate the value of strlen if possible.
529 * @param ent the entity
530 * @param res_tp the result type
532 * @return a Const node containing the strlen() result or NULL
533 * if the evaluation fails
535 static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp) {
536 ir_type *tp = get_entity_type(ent);
540 if (! is_Array_type(tp))
542 tp = get_array_element_type(tp);
543 if (! is_Primitive_type(tp))
545 mode = get_type_mode(tp);
547 /* FIXME: This is too restrict, as the type char might be more the 8bits */
548 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
551 n = get_compound_ent_n_values(ent);
552 for (i = 0; i < n; ++i) {
553 ir_node *irn = get_compound_ent_value(ent, i);
558 if (is_Const_null(irn)) {
559 /* found the length */
565 tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
566 return new_Const_type(tv, res_tp);
571 /* A mapper for strlen */
572 int i_mapper_strlen(ir_node *call, void *ctx) {
573 ir_node *s = get_Call_param(call, 0);
574 ir_entity *ent = get_const_entity(s);
578 /* FIXME: this cannot handle constant strings inside struct initializers yet */
580 /* a constant entity */
581 ir_type *tp = get_Call_type(call);
584 tp = get_method_res_type(tp, 0);
585 irn = eval_strlen(ent, tp);
588 ir_node *mem = get_Call_mem(call);
589 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
590 replace_call(irn, call, mem, NULL, NULL);
595 } /* i_mapper_strlen */
598 * Calculate the value of strlen if possible.
600 * @param left the left entity
601 * @param right the right entity
602 * @param res_tp the result type
604 * @return a Const node containing the strcmp() result or NULL
605 * if the evaluation fails
607 static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp) {
612 tp = get_entity_type(left);
613 if (! is_Array_type(tp))
615 tp = get_array_element_type(tp);
616 if (! is_Primitive_type(tp))
618 mode = get_type_mode(tp);
620 /* FIXME: This is too restrict, as the type char might be more the 8bits */
621 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
624 tp = get_entity_type(right);
625 if (! is_Array_type(tp))
627 tp = get_array_element_type(tp);
628 if (! is_Primitive_type(tp))
630 mode = get_type_mode(tp);
632 /* FIXME: This is too restrict, as the type char might be more the 8bits */
633 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
636 n = get_compound_ent_n_values(left);
637 n_r = get_compound_ent_n_values(right);
640 for (i = 0; i < n; ++i) {
645 irn = get_compound_ent_value(left, i);
648 tv = get_Const_tarval(irn);
649 v_l = get_tarval_long(tv);
651 irn = get_compound_ent_value(right, i);
654 tv = get_Const_tarval(irn);
655 v_r = get_tarval_long(tv);
672 /* we found an end */
673 tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
674 return new_Const_type(tv, res_tp);
680 * Checks if an entity represents the empty string.
682 * @param ent the entity
684 * @return non-zero if ent represents the empty string
686 static int is_empty_string(ir_entity *ent) {
687 ir_type *tp = get_entity_type(ent);
692 if (! is_Array_type(tp))
694 tp = get_array_element_type(tp);
695 if (! is_Primitive_type(tp))
697 mode = get_type_mode(tp);
699 /* FIXME: This is too restrict, as the type char might be more the 8bits */
700 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
703 n = get_compound_ent_n_values(ent);
706 irn = get_compound_ent_value(ent, 0);
708 return is_Const(irn) && is_Const_null(irn);
709 } /* is_empty_string */
711 /* A mapper for strcmp */
712 int i_mapper_strcmp(ir_node *call, void *ctx) {
713 ir_node *left = get_Call_param(call, 0);
714 ir_node *right = get_Call_param(call, 1);
718 ir_type *call_tp = get_Call_type(call);
719 ir_type *res_tp = get_method_res_type(call_tp, 0);
720 ir_entity *ent_l, *ent_r;
726 /* do some type checks first */
727 if (! is_Primitive_type(res_tp))
729 char_tp = get_method_param_type(call_tp, 0);
730 if (char_tp != get_method_param_type(call_tp, 1))
732 if (! is_Pointer_type(char_tp))
734 char_tp = get_pointer_points_to_type(char_tp);
737 /* a strcmp(s, s) ==> 0 */
738 ir_node *mem = get_Call_mem(call);
739 ir_mode *mode = get_type_mode(res_tp);
741 irn = new_Const(get_mode_null(mode));
742 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
743 replace_call(irn, call, mem, NULL, NULL);
746 ent_l = get_const_entity(left);
747 ent_r = get_const_entity(right);
749 if (ent_l != NULL && ent_r != NULL) {
750 /* both entities are const, try to evaluate */
751 irn = eval_strcmp(ent_l, ent_r, res_tp);
752 } else if (ent_l != NULL) {
753 if (is_empty_string(ent_l)) {
754 /* s strcmp("", s) ==> -(*s)*/
756 goto replace_by_call;
758 } else if (ent_r != NULL) {
759 if (is_empty_string(ent_r)) {
760 /* s strcmp(s, "") ==> (*s) */
761 ir_node *mem, *block;
767 mem = get_Call_mem(call);
768 block = get_nodes_block(call);
769 dbg = get_irn_dbg_info(call);
770 mode = get_type_mode(char_tp);
772 /* replace the strcmp by (*x) */
773 irn = new_rd_Load(dbg, current_ir_graph, block, mem, v, mode, 0);
774 mem = new_r_Proj(current_ir_graph, block, irn, mode_M, pn_Load_M);
775 exc = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_except);
776 reg = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_regular);
777 irn = new_r_Proj(current_ir_graph, block, irn, mode, pn_Load_res);
779 /* conv to the result mode */
780 mode = get_type_mode(res_tp);
781 irn = new_rd_Conv(dbg, current_ir_graph, block, irn, mode);
784 /* negate in the ("", s) case */
785 irn = new_rd_Minus(dbg, current_ir_graph, block, irn, mode);
791 ir_node *mem = get_Call_mem(call);
792 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
793 replace_call(irn, call, mem, reg, exc);
798 } /* i_mapper_strcmp */
800 /* A mapper for strncmp */
801 int i_mapper_strncmp(ir_node *call, void *ctx) {
802 ir_node *left = get_Call_param(call, 0);
803 ir_node *right = get_Call_param(call, 1);
804 ir_node *len = get_Call_param(call, 2);
808 if (left == right || (is_Const(len) && is_Const_null(len))) {
809 /* a strncmp(s, s, len) ==> 0 OR
810 a strncmp(a, b, 0) ==> 0 */
811 ir_node *mem = get_Call_mem(call);
812 ir_node *adr = get_Call_ptr(call);
813 ir_entity *ent = get_SymConst_entity(adr);
814 ir_type *call_tp = get_entity_type(ent);
815 ir_type *res_tp = get_method_res_type(call_tp, 0);
816 ir_mode *mode = get_type_mode(res_tp);
818 irn = new_Const(get_mode_null(mode));
819 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
820 replace_call(irn, call, mem, NULL, NULL);
824 } /* i_mapper_strncmp */
826 /* A mapper for strcpy */
827 int i_mapper_strcpy(ir_node *call, void *ctx) {
828 ir_node *dst = get_Call_param(call, 0);
829 ir_node *src = get_Call_param(call, 1);
833 /* a strcpy(d, s) ==> d */
834 ir_node *mem = get_Call_mem(call);
835 ir_node *dst = get_Call_param(call, 0);
837 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
838 replace_call(dst, call, mem, NULL, NULL);
842 } /* i_mapper_strcpy */
844 /* A mapper for memcpy */
845 int i_mapper_memcpy(ir_node *call, void *ctx) {
846 ir_node *dst = get_Call_param(call, 0);
847 ir_node *src = get_Call_param(call, 1);
848 ir_node *len = get_Call_param(call, 2);
851 if (dst == src || (is_Const(len) && is_Const_null(len))) {
852 /* a memcpy(d, d, len) ==> d OR
853 a memcpy(d, s, 0) ==> d */
854 ir_node *mem = get_Call_mem(call);
856 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
857 replace_call(dst, call, mem, NULL, NULL);
861 } /* i_mapper_memcpy */
863 /* A mapper for mempcpy */
864 int i_mapper_mempcpy(ir_node *call, void *ctx) {
865 ir_node *dst = get_Call_param(call, 0);
866 ir_node *src = get_Call_param(call, 1);
867 ir_node *len = get_Call_param(call, 2);
870 if (dst == src || (is_Const(len) && is_Const_null(len))) {
871 /* a memcpy(d, d, len) ==> d + len OR
872 a memcpy(d, s, 0) ==> d + 0 */
873 dbg_info *dbg = get_irn_dbg_info(call);
874 ir_node *mem = get_Call_mem(call);
875 ir_node *blk = get_nodes_block(call);
876 ir_mode *mode = get_irn_mode(dst);
877 ir_node *res = new_rd_Add(dbg, get_irn_irg(blk), blk, dst, len, mode);
879 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
880 replace_call(res, call, mem, NULL, NULL);
884 } /* i_mapper_mempcpy */
886 /* A mapper for memmove */
887 int i_mapper_memmove(ir_node *call, void *ctx) {
888 ir_node *dst = get_Call_param(call, 0);
889 ir_node *src = get_Call_param(call, 1);
890 ir_node *len = get_Call_param(call, 2);
893 if (dst == src || (is_Const(len) && is_Const_null(len))) {
894 /* a memmove(d, d, len) ==> d OR
895 a memmove(d, s, 0) ==> d */
896 ir_node *mem = get_Call_mem(call);
898 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
899 replace_call(dst, call, mem, NULL, NULL);
903 } /* i_mapper_memmove */
905 /* A mapper for memset */
906 int i_mapper_memset(ir_node *call, void *ctx) {
907 ir_node *len = get_Call_param(call, 2);
910 if (is_Const(len) && is_Const_null(len)) {
911 /* a memset(d, C, 0) ==> d */
912 ir_node *mem = get_Call_mem(call);
913 ir_node *dst = get_Call_param(call, 0);
915 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
916 replace_call(dst, call, mem, NULL, NULL);
920 } /* i_mapper_memset */
922 /* A mapper for memcmp */
923 int i_mapper_memcmp(ir_node *call, void *ctx) {
924 ir_node *left = get_Call_param(call, 0);
925 ir_node *right = get_Call_param(call, 1);
926 ir_node *len = get_Call_param(call, 2);
930 if (left == right || (is_Const(len) && is_Const_null(len))) {
931 /* a memcmp(s, s, len) ==> 0 OR
932 a memcmp(a, b, 0) ==> 0 */
933 ir_node *mem = get_Call_mem(call);
934 ir_node *adr = get_Call_ptr(call);
935 ir_entity *ent = get_SymConst_entity(adr);
936 ir_type *call_tp = get_entity_type(ent);
937 ir_type *res_tp = get_method_res_type(call_tp, 0);
938 ir_mode *mode = get_type_mode(res_tp);
940 irn = new_Const(get_mode_null(mode));
941 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
942 replace_call(irn, call, mem, NULL, NULL);
946 } /* i_mapper_memcmp */
949 * Returns the result mode of a node.
951 static ir_mode *get_irn_res_mode(ir_node *node) {
952 switch (get_irn_opcode(node)) {
953 case iro_Load: return get_Load_mode(node);
954 case iro_Quot: return get_Quot_resmode(node);
955 case iro_Div: return get_Div_resmode(node);
956 case iro_Mod: return get_Mod_resmode(node);
957 case iro_DivMod: return get_DivMod_resmode(node);
958 default: return NULL;
960 } /* get_irn_res_mode */
962 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
964 /* A mapper for mapping unsupported instructions to runtime calls. */
965 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) {
966 int i, j, arity, first, n_param, n_res;
969 ir_node *mem, *bl, *call, *addr, *res_proj;
973 ir_mode *mode = get_irn_mode(node);
975 if (mode != rt->mode)
977 /* check if the result modes match */
978 if (mode == mode_T && rt->res_mode != NULL) {
979 mode = get_irn_res_mode(node);
980 if (mode != rt->res_mode)
984 arity = get_irn_arity(node);
988 mtp = get_entity_type(rt->ent);
989 n_param = get_method_n_params(mtp);
990 irg = current_ir_graph;
992 mem = get_irn_n(node, 0);
993 if (get_irn_mode(mem) != mode_M) {
994 mem = new_r_NoMem(irg);
999 /* check if the modes of the predecessors match the parameter modes */
1000 if (arity - first != n_param)
1003 for (i = first, j = 0; i < arity; ++i, ++j) {
1004 ir_type *param_tp = get_method_param_type(mtp, j);
1005 ir_node *pred = get_irn_n(node, i);
1007 if (get_type_mode(param_tp) != get_irn_mode(pred))
1011 n_res = get_method_n_ress(mtp);
1013 /* step 0: calculate the number of needed Proj's */
1015 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
1016 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1017 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1018 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
1019 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
1022 if (rt->mode != mode_T) /* must be mode_T */
1027 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1031 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1032 bl = get_nodes_block(node);
1036 NEW_ARR_A(ir_node *, in, n_param);
1037 for (i = 0; i < n_param; ++i)
1038 in[i] = get_irn_n(node, first + i);
1041 /* step 1: create the call */
1042 sym.entity_p = rt->ent;
1043 addr = new_r_SymConst(irg, bl, mode_P_code, sym, symconst_addr_ent);
1044 call = new_rd_Call(get_irn_dbg_info(node), irg, bl, mem, addr, n_param, in, mtp);
1045 set_irn_pinned(call, get_irn_pinned(node));
1048 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
1053 n_proj += n_res - 1;
1056 turn_into_tuple(node, n_proj);
1058 for (i = 0; i < n_proj; ++i)
1059 set_Tuple_pred(node, i, new_r_Bad(irg));
1060 if (rt->mem_proj_nr >= 0)
1061 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_regular));
1062 if (!is_NoMem(mem)) {
1063 /* Exceptions can only be handled with real memory */
1064 if (rt->regular_proj_nr >= 0)
1065 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_regular));
1066 if (rt->exc_proj_nr >= 0)
1067 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_except));
1068 if (rt->exc_mem_proj_nr >= 0)
1069 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_except));
1072 if (rt->res_proj_nr >= 0)
1073 for (i = 0; i < n_res; ++i)
1074 set_Tuple_pred(node, rt->res_proj_nr + i,
1075 new_r_Proj(irg, bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
1078 /* only one return value supported */
1080 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1082 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
1083 res_proj = new_r_Proj(irg, bl, res_proj, mode, 0);
1085 exchange(node, res_proj);
1089 /* should not happen */
1091 } /* i_mapper_RuntimeCall */