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
44 #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);
125 if (part_block_used) {
126 ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
127 collect_phiprojs(irg);
130 wenv.nr_of_intrinsics = 0;
131 irg_walk_graph(irg, NULL, call_mapper, &wenv);
134 ir_free_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
136 if (wenv.nr_of_intrinsics > 0) {
137 /* Changes detected: we might have added/removed nodes. */
138 set_irg_outs_inconsistent(irg);
139 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
141 /* Exception control flow might have changed / new block might have added. */
142 set_irg_doms_inconsistent(irg);
143 set_irg_extblk_inconsistent(irg);
144 set_irg_loopinfo_inconsistent(irg);
146 /* Calls might be removed/added. */
147 set_trouts_inconsistent();
150 irg_verify(irg, VRFY_NORMAL);
152 /* Optimize it, tuple might be created. */
153 optimize_graph_df(irg);
155 nr_of_intrinsics += wenv.nr_of_intrinsics;
160 return nr_of_intrinsics;
161 } /* lower_intrinsics */
172 * Wrapper for running lower_intrinsics() as an ir_prog pass.
174 static int pass_wrapper(ir_prog *irp, void *context)
176 struct pass_t *pass = context;
177 (void) irp; /* TODO: set current irp, or remove parameter */
178 lower_intrinsics(pass->list, pass->length, pass->part_block_used);
179 /* probably this pass should not run again */
184 * Creates an ir_prog pass for lower_intrinsics.
186 * @param name the name of this pass or NULL
187 * @param list an array of intrinsic map records
188 * @param length the length of the array
189 * @param part_block_used set to true if part_block() must be using during lowering
191 ir_prog_pass_t *lower_intrinsics_pass(
193 i_record *list, int length, int part_block_used)
195 struct pass_t *pass = xmalloc(sizeof(*pass) + (length-1) * sizeof(pass->list[0]));
197 memcpy(pass->list, list, sizeof(list[0]) * length);
198 pass->length = length;
199 pass->part_block_used = part_block_used;
201 return def_prog_pass_constructor(
202 &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
203 } /* lower_intrinsics_pass*/
206 * Helper function, replace the call by the given node.
208 * @param irn the result node
209 * @param call the call to replace
210 * @param mem the new mem result
211 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
212 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
214 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp) {
215 ir_node *block = get_nodes_block(call);
217 if (reg_jmp == NULL) {
219 /* Beware: do we need here a protection against CSE? Better we do it. */
220 int old_cse = get_opt_cse();
222 reg_jmp = new_r_Jmp(block);
223 set_opt_cse(old_cse);
226 irn = new_r_Tuple(block, 1, &irn);
228 turn_into_tuple(call, pn_Call_max);
229 set_Tuple_pred(call, pn_Call_M, mem);
230 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
231 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
232 set_Tuple_pred(call, pn_Call_T_result, irn);
233 set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
236 /* A mapper for the integer abs. */
237 int i_mapper_abs(ir_node *call, void *ctx) {
238 ir_node *mem = get_Call_mem(call);
239 ir_node *block = get_nodes_block(call);
240 ir_node *op = get_Call_param(call, 0);
242 dbg_info *dbg = get_irn_dbg_info(call);
245 irn = new_rd_Abs(dbg, block, op, get_irn_mode(op));
246 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
247 replace_call(irn, call, mem, NULL, NULL);
251 /* A mapper for the integer bswap. */
252 int i_mapper_bswap(ir_node *call, void *ctx) {
253 ir_node *mem = get_Call_mem(call);
254 ir_node *block = get_nodes_block(call);
255 ir_node *op = get_Call_param(call, 0);
256 ir_type *tp = get_Call_type(call);
257 dbg_info *dbg = get_irn_dbg_info(call);
261 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
262 set_irn_pinned(irn, op_pin_state_floats);
263 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
264 irn = new_r_Proj(block, irn, get_irn_mode(op), pn_Builtin_1_result);
265 replace_call(irn, call, mem, NULL, NULL);
267 } /* i_mapper_bswap */
269 /* A mapper for the alloca() function. */
270 int i_mapper_alloca(ir_node *call, void *ctx) {
271 ir_node *mem = get_Call_mem(call);
272 ir_node *block = get_nodes_block(call);
273 ir_node *op = get_Call_param(call, 0);
274 ir_node *irn, *exc, *no_exc;
275 dbg_info *dbg = get_irn_dbg_info(call);
278 if (mode_is_signed(get_irn_mode(op))) {
279 ir_mode *mode = get_irn_mode(op);
280 mode = find_unsigned_mode(mode);
282 panic("Cannot find unsigned mode for %M", mode);
284 op = new_rd_Conv(dbg, block, op, mode);
287 irn = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
288 mem = new_rd_Proj(dbg, block, irn, mode_M, pn_Alloc_M);
289 no_exc = new_rd_Proj(dbg, block, irn, mode_X, pn_Alloc_X_regular);
290 exc = new_rd_Proj(dbg, block, irn, mode_X, pn_Alloc_X_except);
291 irn = new_rd_Proj(dbg, block, irn, get_modeP_data(), pn_Alloc_res);
293 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
294 replace_call(irn, call, mem, no_exc, exc);
296 } /* i_mapper_alloca */
298 /* A mapper for the floating point sqrt. */
299 int i_mapper_sqrt(ir_node *call, void *ctx) {
302 ir_node *op = get_Call_param(call, 0);
308 tv = get_Const_tarval(op);
309 if (! tarval_is_null(tv) && !tarval_is_one(tv))
312 mem = get_Call_mem(call);
314 /* sqrt(0) = 0, sqrt(1) = 1 */
315 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
316 replace_call(op, call, mem, NULL, NULL);
318 } /* i_mapper_sqrt */
320 /* A mapper for the floating point cbrt. */
321 int i_mapper_cbrt(ir_node *call, void *ctx) {
324 ir_node *op = get_Call_param(call, 0);
330 tv = get_Const_tarval(op);
331 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
334 mem = get_Call_mem(call);
336 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
337 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
338 replace_call(op, call, mem, NULL, NULL);
340 } /* i_mapper_cbrt */
342 /* A mapper for the floating point pow. */
343 int i_mapper_pow(ir_node *call, void *ctx) {
346 ir_node *left = get_Call_param(call, 0);
347 ir_node *right = get_Call_param(call, 1);
348 ir_node *block = get_nodes_block(call);
349 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
352 if (is_Const(left) && is_Const_one(left)) {
353 /* pow (1.0, x) = 1.0 */
355 } else if (is_Const(right)) {
356 tarval *tv = get_Const_tarval(right);
357 if (tarval_is_null(tv)) {
358 /* pow(x, 0.0) = 1.0 */
359 ir_mode *mode = get_tarval_mode(tv);
360 irn = new_Const(get_mode_one(mode));
361 } else if (tarval_is_one(tv)) {
362 /* pow(x, 1.0) = x */
364 } else if (tarval_is_minus_one(tv)) {
365 /* pow(x, -1.0) = 1/x */
373 mem = get_Call_mem(call);
374 dbg = get_irn_dbg_info(call);
377 ir_mode *mode = get_irn_mode(left);
380 irn = new_Const(get_mode_one(mode));
381 quot = new_rd_Quot(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
382 mem = new_r_Proj(block, quot, mode_M, pn_Quot_M);
383 irn = new_r_Proj(block, quot, mode, pn_Quot_res);
384 reg_jmp = new_r_Proj(block, quot, mode_X, pn_Quot_X_regular);
385 exc_jmp = new_r_Proj(block, quot, mode_X, pn_Quot_X_except);
387 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
388 replace_call(irn, call, mem, reg_jmp, exc_jmp);
392 /* A mapper for the floating point exp. */
393 int i_mapper_exp(ir_node *call, void *ctx) {
394 ir_node *val = get_Call_param(call, 0);
397 if (is_Const(val) && is_Const_null(val)) {
399 ir_mode *mode = get_irn_mode(val);
400 ir_node *irn = new_Const(get_mode_one(mode));
401 ir_node *mem = get_Call_mem(call);
402 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
403 replace_call(irn, call, mem, NULL, NULL);
410 * A mapper for mapping f(0.0) to 0.0.
412 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason) {
413 ir_node *val = get_Call_param(call, 0);
416 if (is_Const(val) && is_Const_null(val)) {
418 ir_node *mem = get_Call_mem(call);
419 DBG_OPT_ALGSIM0(call, val, reason);
420 replace_call(val, call, mem, NULL, NULL);
424 } /* i_mapper_zero_to_zero */
427 * A mapper for mapping f(1.0) to 0.0.
429 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason) {
430 ir_node *val = get_Call_param(call, 0);
433 if (is_Const(val) && is_Const_one(val)) {
434 /* acos(1.0) = 0.0 */
435 ir_mode *mode = get_irn_mode(val);
436 ir_node *irn = new_Const(get_mode_null(mode));
437 ir_node *mem = get_Call_mem(call);
438 DBG_OPT_ALGSIM0(call, irn, reason);
439 replace_call(irn, call, mem, NULL, NULL);
443 } /* i_mapper_one_to_zero */
446 * A mapper for mapping a functions with the following characteristics:
450 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason) {
451 ir_node *val = get_Call_param(call, 0);
454 if (is_strictConv(val)) {
455 ir_node *op = get_Conv_op(val);
457 /* f(-x) = f(x) with strictConv */
458 ir_node *block = get_nodes_block(call);
459 ir_mode *mode = get_irn_mode(val);
460 dbg_info *dbg = get_irn_dbg_info(val);
462 op = get_Minus_op(op);
463 val = new_rd_Conv(dbg, block, op, mode);
466 set_Conv_strict(val, 1);
468 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
469 set_Call_param(call, 0, val);
471 } else if (is_Minus(val)) {
473 val = get_Minus_op(val);
474 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
475 set_Call_param(call, 0, val);
478 if (is_Const(val) && is_Const_null(val)) {
480 ir_mode *mode = get_irn_mode(val);
481 ir_node *irn = new_Const(get_mode_one(mode));
482 ir_node *mem = get_Call_mem(call);
483 DBG_OPT_ALGSIM0(call, irn, reason);
484 replace_call(irn, call, mem, NULL, NULL);
488 } /* i_mapper_symmetric_zero_to_one */
490 /* A mapper for the floating point log. */
491 int i_mapper_log(ir_node *call, void *ctx) {
493 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
496 /* A mapper for the floating point sin. */
497 int i_mapper_sin(ir_node *call, void *ctx) {
499 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
502 /* A mapper for the floating point cos. */
503 int i_mapper_cos(ir_node *call, void *ctx) {
504 /* cos(0.0) = 1.0, cos(-x) = x */
505 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
508 /* A mapper for the floating point tan. */
509 int i_mapper_tan(ir_node *call, void *ctx) {
511 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
514 /* A mapper for the floating point asin. */
515 int i_mapper_asin(ir_node *call, void *ctx) {
516 /* asin(0.0) = 0.0 */
517 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
518 } /* i_mapper_asin */
520 /* A mapper for the floating point acos. */
521 int i_mapper_acos(ir_node *call, void *ctx) {
522 /* acos(1.0) = 0.0 */
523 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
524 } /* i_mapper_acos */
526 /* A mapper for the floating point atan. */
527 int i_mapper_atan(ir_node *call, void *ctx) {
528 /* atan(0.0) = 0.0 */
529 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
530 } /* i_mapper_atan */
532 /* A mapper for the floating point sinh. */
533 int i_mapper_sinh(ir_node *call, void *ctx) {
534 /* sinh(0.0) = 0.0 */
535 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
536 } /* i_mapper_sinh */
538 /* A mapper for the floating point cosh. */
539 int i_mapper_cosh(ir_node *call, void *ctx) {
540 /* cosh(0.0) = 1.0, cosh(-x) = x */
541 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
542 } /* i_mapper_cosh */
544 /* A mapper for the floating point tanh. */
545 int i_mapper_tanh(ir_node *call, void *ctx) {
546 /* tanh(0.0) = 0.0 */
547 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
548 } /* i_mapper_tanh */
551 * Return the const entity that is accessed through the pointer ptr or
552 * NULL if there is no entity (or the entity is not constant).
554 * @param ptr the pointer
556 static ir_entity *get_const_entity(ir_node *ptr)
558 if (is_Global(ptr)) {
559 ir_entity *ent = get_Global_entity(ptr);
561 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
562 /* a constant entity */
567 } /* get_const_entity */
569 static bool initializer_val_is_null(ir_initializer_t *init)
573 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
576 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
577 tv = get_initializer_tarval_value(init);
578 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
579 ir_node *irn = get_initializer_const_value(init);
582 tv = get_Const_tarval(irn);
587 return tarval_is_null(tv);
591 * Calculate the value of strlen if possible.
593 * @param ent the entity
594 * @param res_tp the result type
596 * @return a Const node containing the strlen() result or NULL
597 * if the evaluation fails
599 static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp) {
600 ir_type *tp = get_entity_type(ent);
602 ir_initializer_t *initializer;
606 if (! is_Array_type(tp))
608 tp = get_array_element_type(tp);
609 if (! is_Primitive_type(tp))
611 mode = get_type_mode(tp);
613 /* FIXME: This is too restrict, as the type char might be more the 8bits */
614 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
617 if (!has_entity_initializer(ent)) {
622 n = get_compound_ent_n_values(ent);
623 for (i = 0; i < n; ++i) {
624 ir_node *irn = get_compound_ent_value(ent, i);
629 if (is_Const_null(irn)) {
630 /* found the length */
636 tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
637 return new_Const_type(tv, res_tp);
642 initializer = get_entity_initializer(ent);
643 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
646 size = get_initializer_compound_n_entries(initializer);
647 for (i = 0; i < size; ++i) {
648 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
649 if (initializer_val_is_null(val)) {
650 tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
651 return new_Const_type(tv, res_tp);
658 /* A mapper for strlen */
659 int i_mapper_strlen(ir_node *call, void *ctx) {
660 ir_node *s = get_Call_param(call, 0);
661 ir_entity *ent = get_const_entity(s);
665 /* FIXME: this cannot handle constant strings inside struct initializers yet */
667 /* a constant entity */
668 ir_type *tp = get_Call_type(call);
671 tp = get_method_res_type(tp, 0);
672 irn = eval_strlen(ent, tp);
675 ir_node *mem = get_Call_mem(call);
676 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
677 replace_call(irn, call, mem, NULL, NULL);
682 } /* i_mapper_strlen */
685 * Calculate the value of strlen if possible.
687 * @param left the left entity
688 * @param right the right entity
689 * @param res_tp the result type
691 * @return a Const node containing the strcmp() result or NULL
692 * if the evaluation fails
694 static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp) {
699 tp = get_entity_type(left);
700 if (! is_Array_type(tp))
702 tp = get_array_element_type(tp);
703 if (! is_Primitive_type(tp))
705 mode = get_type_mode(tp);
707 /* FIXME: This is too restrict, as the type char might be more the 8bits */
708 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
711 tp = get_entity_type(right);
712 if (! is_Array_type(tp))
714 tp = get_array_element_type(tp);
715 if (! is_Primitive_type(tp))
717 mode = get_type_mode(tp);
719 /* FIXME: This is too restrict, as the type char might be more the 8bits */
720 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
723 if (!has_entity_initializer(left) && !has_entity_initializer(right)) {
724 /* code that uses deprecated compound_graph_path stuff */
726 n = get_compound_ent_n_values(left);
727 n_r = get_compound_ent_n_values(right);
730 for (i = 0; i < n; ++i) {
735 irn = get_compound_ent_value(left, i);
738 tv = get_Const_tarval(irn);
739 v_l = get_tarval_long(tv);
741 irn = get_compound_ent_value(right, i);
744 tv = get_Const_tarval(irn);
745 v_r = get_tarval_long(tv);
762 /* we found an end */
763 tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
764 return new_Const_type(tv, res_tp);
775 * Checks if an entity represents the empty string.
777 * @param ent the entity
779 * @return non-zero if ent represents the empty string
781 static int is_empty_string(ir_entity *ent) {
782 ir_type *tp = get_entity_type(ent);
785 ir_initializer_t *initializer;
786 ir_initializer_t *init0;
788 if (! is_Array_type(tp))
790 tp = get_array_element_type(tp);
791 if (! is_Primitive_type(tp))
793 mode = get_type_mode(tp);
795 /* FIXME: This is too restrict, as the type char might be more the 8bits */
796 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
799 if (!has_entity_initializer(ent)) {
800 /* code for deprecated compound_graph_path stuff */
801 int n = get_compound_ent_n_values(ent);
804 irn = get_compound_ent_value(ent, 0);
806 return is_Const(irn) && is_Const_null(irn);
809 initializer = get_entity_initializer(ent);
810 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
813 if (get_initializer_compound_n_entries(initializer) < 1)
816 init0 = get_initializer_compound_value(initializer, 0);
817 return initializer_val_is_null(init0);
818 } /* is_empty_string */
820 /* A mapper for strcmp */
821 int i_mapper_strcmp(ir_node *call, void *ctx) {
822 ir_node *left = get_Call_param(call, 0);
823 ir_node *right = get_Call_param(call, 1);
827 ir_type *call_tp = get_Call_type(call);
828 ir_type *res_tp = get_method_res_type(call_tp, 0);
829 ir_entity *ent_l, *ent_r;
835 /* do some type checks first */
836 if (! is_Primitive_type(res_tp))
838 char_tp = get_method_param_type(call_tp, 0);
839 if (char_tp != get_method_param_type(call_tp, 1))
841 if (! is_Pointer_type(char_tp))
843 char_tp = get_pointer_points_to_type(char_tp);
846 /* a strcmp(s, s) ==> 0 */
847 ir_node *mem = get_Call_mem(call);
848 ir_mode *mode = get_type_mode(res_tp);
850 irn = new_Const(get_mode_null(mode));
851 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
852 replace_call(irn, call, mem, NULL, NULL);
855 ent_l = get_const_entity(left);
856 ent_r = get_const_entity(right);
858 if (ent_l != NULL && ent_r != NULL) {
859 /* both entities are const, try to evaluate */
860 irn = eval_strcmp(ent_l, ent_r, res_tp);
861 } else if (ent_l != NULL) {
862 if (is_empty_string(ent_l)) {
863 /* s strcmp("", s) ==> -(*s)*/
865 goto replace_by_call;
867 } else if (ent_r != NULL) {
868 if (is_empty_string(ent_r)) {
869 /* s strcmp(s, "") ==> (*s) */
870 ir_node *mem, *block;
876 mem = get_Call_mem(call);
877 block = get_nodes_block(call);
878 dbg = get_irn_dbg_info(call);
879 mode = get_type_mode(char_tp);
881 /* replace the strcmp by (*x) */
882 irn = new_rd_Load(dbg, block, mem, v, mode, 0);
883 mem = new_r_Proj(block, irn, mode_M, pn_Load_M);
884 exc = new_r_Proj(block, irn, mode_X, pn_Load_X_except);
885 reg = new_r_Proj(block, irn, mode_X, pn_Load_X_regular);
886 irn = new_r_Proj(block, irn, mode, pn_Load_res);
888 /* conv to the result mode */
889 mode = get_type_mode(res_tp);
890 irn = new_rd_Conv(dbg, block, irn, mode);
893 /* negate in the ("", s) case */
894 irn = new_rd_Minus(dbg, block, irn, mode);
900 ir_node *mem = get_Call_mem(call);
901 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
902 replace_call(irn, call, mem, reg, exc);
907 } /* i_mapper_strcmp */
909 /* A mapper for strncmp */
910 int i_mapper_strncmp(ir_node *call, void *ctx) {
911 ir_node *left = get_Call_param(call, 0);
912 ir_node *right = get_Call_param(call, 1);
913 ir_node *len = get_Call_param(call, 2);
917 if (left == right || (is_Const(len) && is_Const_null(len))) {
918 /* a strncmp(s, s, len) ==> 0 OR
919 a strncmp(a, b, 0) ==> 0 */
920 ir_node *mem = get_Call_mem(call);
921 ir_node *adr = get_Call_ptr(call);
922 ir_entity *ent = get_SymConst_entity(adr);
923 ir_type *call_tp = get_entity_type(ent);
924 ir_type *res_tp = get_method_res_type(call_tp, 0);
925 ir_mode *mode = get_type_mode(res_tp);
927 irn = new_Const(get_mode_null(mode));
928 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
929 replace_call(irn, call, mem, NULL, NULL);
933 } /* i_mapper_strncmp */
935 /* A mapper for strcpy */
936 int i_mapper_strcpy(ir_node *call, void *ctx) {
937 ir_node *dst = get_Call_param(call, 0);
938 ir_node *src = get_Call_param(call, 1);
942 /* a strcpy(d, s) ==> d */
943 ir_node *mem = get_Call_mem(call);
944 ir_node *dst = get_Call_param(call, 0);
946 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
947 replace_call(dst, call, mem, NULL, NULL);
951 } /* i_mapper_strcpy */
953 /* A mapper for memcpy */
954 int i_mapper_memcpy(ir_node *call, void *ctx) {
955 ir_node *dst = get_Call_param(call, 0);
956 ir_node *src = get_Call_param(call, 1);
957 ir_node *len = get_Call_param(call, 2);
960 if (dst == src || (is_Const(len) && is_Const_null(len))) {
961 /* a memcpy(d, d, len) ==> d OR
962 a memcpy(d, s, 0) ==> d */
963 ir_node *mem = get_Call_mem(call);
965 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
966 replace_call(dst, call, mem, NULL, NULL);
970 } /* i_mapper_memcpy */
972 /* A mapper for mempcpy */
973 int i_mapper_mempcpy(ir_node *call, void *ctx) {
974 ir_node *dst = get_Call_param(call, 0);
975 ir_node *src = get_Call_param(call, 1);
976 ir_node *len = get_Call_param(call, 2);
979 if (dst == src || (is_Const(len) && is_Const_null(len))) {
980 /* a memcpy(d, d, len) ==> d + len OR
981 a memcpy(d, s, 0) ==> d + 0 */
982 dbg_info *dbg = get_irn_dbg_info(call);
983 ir_node *mem = get_Call_mem(call);
984 ir_node *blk = get_nodes_block(call);
985 ir_mode *mode = get_irn_mode(dst);
986 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
988 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
989 replace_call(res, call, mem, NULL, NULL);
993 } /* i_mapper_mempcpy */
995 /* A mapper for memmove */
996 int i_mapper_memmove(ir_node *call, void *ctx) {
997 ir_node *dst = get_Call_param(call, 0);
998 ir_node *src = get_Call_param(call, 1);
999 ir_node *len = get_Call_param(call, 2);
1002 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1003 /* a memmove(d, d, len) ==> d OR
1004 a memmove(d, s, 0) ==> d */
1005 ir_node *mem = get_Call_mem(call);
1007 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
1008 replace_call(dst, call, mem, NULL, NULL);
1012 } /* i_mapper_memmove */
1014 /* A mapper for memset */
1015 int i_mapper_memset(ir_node *call, void *ctx) {
1016 ir_node *len = get_Call_param(call, 2);
1019 if (is_Const(len) && is_Const_null(len)) {
1020 /* a memset(d, C, 0) ==> d */
1021 ir_node *mem = get_Call_mem(call);
1022 ir_node *dst = get_Call_param(call, 0);
1024 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
1025 replace_call(dst, call, mem, NULL, NULL);
1029 } /* i_mapper_memset */
1031 /* A mapper for memcmp */
1032 int i_mapper_memcmp(ir_node *call, void *ctx) {
1033 ir_node *left = get_Call_param(call, 0);
1034 ir_node *right = get_Call_param(call, 1);
1035 ir_node *len = get_Call_param(call, 2);
1039 if (left == right || (is_Const(len) && is_Const_null(len))) {
1040 /* a memcmp(s, s, len) ==> 0 OR
1041 a memcmp(a, b, 0) ==> 0 */
1042 ir_node *mem = get_Call_mem(call);
1043 ir_node *adr = get_Call_ptr(call);
1044 ir_entity *ent = get_SymConst_entity(adr);
1045 ir_type *call_tp = get_entity_type(ent);
1046 ir_type *res_tp = get_method_res_type(call_tp, 0);
1047 ir_mode *mode = get_type_mode(res_tp);
1049 irn = new_Const(get_mode_null(mode));
1050 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1051 replace_call(irn, call, mem, NULL, NULL);
1055 } /* i_mapper_memcmp */
1058 * Returns the result mode of a node.
1060 static ir_mode *get_irn_res_mode(ir_node *node) {
1061 switch (get_irn_opcode(node)) {
1062 case iro_Load: return get_Load_mode(node);
1063 case iro_Quot: return get_Quot_resmode(node);
1064 case iro_Div: return get_Div_resmode(node);
1065 case iro_Mod: return get_Mod_resmode(node);
1066 case iro_DivMod: return get_DivMod_resmode(node);
1067 default: return NULL;
1069 } /* get_irn_res_mode */
1071 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
1073 /* A mapper for mapping unsupported instructions to runtime calls. */
1074 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) {
1075 int i, j, arity, first, n_param, n_res;
1078 ir_node *mem, *bl, *call, *addr, *res_proj;
1081 symconst_symbol sym;
1082 ir_mode *mode = get_irn_mode(node);
1084 if (mode != rt->mode)
1086 /* check if the result modes match */
1087 if (mode == mode_T && rt->res_mode != NULL) {
1088 mode = get_irn_res_mode(node);
1089 if (mode != rt->res_mode)
1093 arity = get_irn_arity(node);
1097 mtp = get_entity_type(rt->ent);
1098 n_param = get_method_n_params(mtp);
1099 irg = current_ir_graph;
1101 mem = get_irn_n(node, 0);
1102 if (get_irn_mode(mem) != mode_M) {
1103 mem = new_r_NoMem(irg);
1108 /* check if the modes of the predecessors match the parameter modes */
1109 if (arity - first != n_param)
1112 for (i = first, j = 0; i < arity; ++i, ++j) {
1113 ir_type *param_tp = get_method_param_type(mtp, j);
1114 ir_node *pred = get_irn_n(node, i);
1116 if (get_type_mode(param_tp) != get_irn_mode(pred))
1120 n_res = get_method_n_ress(mtp);
1122 /* step 0: calculate the number of needed Proj's */
1124 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
1125 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1126 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1127 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
1128 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
1131 if (rt->mode != mode_T) /* must be mode_T */
1136 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1140 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1141 bl = get_nodes_block(node);
1145 NEW_ARR_A(ir_node *, in, n_param);
1146 for (i = 0; i < n_param; ++i)
1147 in[i] = get_irn_n(node, first + i);
1150 /* step 1: create the call */
1151 sym.entity_p = rt->ent;
1152 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1153 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1154 set_irn_pinned(call, get_irn_pinned(node));
1157 res_proj = new_r_Proj(bl, call, mode_T, pn_Call_T_result);
1162 n_proj += n_res - 1;
1165 turn_into_tuple(node, n_proj);
1167 for (i = 0; i < n_proj; ++i)
1168 set_Tuple_pred(node, i, new_r_Bad(irg));
1169 if (rt->mem_proj_nr >= 0)
1170 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(bl, call, mode_M, pn_Call_M));
1171 if (!is_NoMem(mem)) {
1172 /* Exceptions can only be handled with real memory */
1173 if (rt->regular_proj_nr >= 0)
1174 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(bl, call, mode_X, pn_Call_X_regular));
1175 if (rt->exc_proj_nr >= 0)
1176 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(bl, call, mode_X, pn_Call_X_except));
1177 if (rt->exc_mem_proj_nr >= 0)
1178 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(bl, call, mode_M, pn_Call_M));
1181 if (rt->res_proj_nr >= 0)
1182 for (i = 0; i < n_res; ++i)
1183 set_Tuple_pred(node, rt->res_proj_nr + i,
1184 new_r_Proj(bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
1187 /* only one return value supported */
1189 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1191 res_proj = new_r_Proj(bl, call, mode_T, pn_Call_T_result);
1192 res_proj = new_r_Proj(bl, res_proj, mode, 0);
1194 exchange(node, res_proj);
1198 /* should not happen */
1200 } /* i_mapper_RuntimeCall */