2 * Copyright (C) 1995-2007 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief lowering of Calls of intrinsic functions
23 * @author Michael Beck
43 #include "iropt_dbg.h"
45 /** Walker environment */
46 typedef struct _walker_env {
47 pmap *c_map; /**< The intrinsic call map. */
48 unsigned nr_of_intrinsics; /**< statistics */
49 i_instr_record **i_map; /**< The intrinsic instruction map. */
53 * walker: call all mapper functions
55 static void call_mapper(ir_node *node, void *env) {
56 walker_env_t *wenv = env;
57 ir_op *op = get_irn_op(node);
62 const i_call_record *r;
65 symconst = get_Call_ptr(node);
66 if (get_irn_op(symconst) != op_SymConst ||
67 get_SymConst_kind(symconst) != symconst_addr_ent)
70 ent = get_SymConst_entity(symconst);
71 p = pmap_find(wenv->c_map, ent);
75 wenv->nr_of_intrinsics += r->i_mapper(node, r->ctx) ? 1 : 0;
78 if (op->code < (unsigned) ARR_LEN(wenv->i_map)) {
79 const i_instr_record *r = wenv->i_map[op->code];
80 /* run all possible mapper */
82 if (r->i_mapper(node, r->ctx)) {
83 ++wenv->nr_of_intrinsics;
92 /* Go through all graphs and map calls to intrinsic functions. */
93 unsigned lower_intrinsics(i_record *list, int length, int part_block_used) {
94 int i, n_ops = get_irp_n_opcodes();
96 pmap *c_map = pmap_create_ex(length);
97 i_instr_record **i_map;
98 unsigned nr_of_intrinsics = 0;
101 /* we use the ir_op generic pointers here */
102 NEW_ARR_A(const i_instr_record *, i_map, n_ops);
103 memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
105 /* fill a map for faster search */
106 for (i = length - 1; i >= 0; --i) {
107 if (list[i].i_call.kind == INTRINSIC_CALL) {
108 pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
110 ir_op *op = list[i].i_instr.op;
111 assert(op->code < (unsigned) ARR_LEN(i_map));
113 list[i].i_instr.link = i_map[op->code];
114 i_map[op->code] = &list[i].i_instr;
121 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
122 irg = get_irp_irg(i);
125 collect_phiprojs(irg);
127 wenv.nr_of_intrinsics = 0;
128 irg_walk_graph(irg, NULL, call_mapper, &wenv);
130 if (wenv.nr_of_intrinsics) {
131 /* changes detected */
132 set_irg_outs_inconsistent(irg);
133 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
135 /* exception control flow might have changed */
136 set_irg_doms_inconsistent(irg);
137 set_irg_extblk_inconsistent(irg);
138 set_irg_loopinfo_inconsistent(irg);
140 /* calls might be removed/added */
141 set_trouts_inconsistent();
143 /* optimize it, tuple might be created */
144 local_optimize_graph(irg);
146 nr_of_intrinsics += wenv.nr_of_intrinsics;
151 return nr_of_intrinsics;
152 } /* lower_intrinsics */
155 * Helper function, replace the call by the given node.
157 * @param irn the result node
158 * @param call the call to replace
159 * @param mem the new mem result
160 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
161 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
163 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp) {
164 ir_node *block = get_nodes_block(call);
166 if (reg_jmp == NULL) {
168 /* Beware: do we need here a protection against CSE? Better we do it. */
169 int old_cse = get_opt_cse();
171 reg_jmp = new_r_Jmp(current_ir_graph, block);
172 set_opt_cse(old_cse);
175 irn = new_r_Tuple(current_ir_graph, block, 1, &irn);
177 turn_into_tuple(call, pn_Call_max);
178 set_Tuple_pred(call, pn_Call_M_regular, mem);
179 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
180 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
181 set_Tuple_pred(call, pn_Call_T_result, irn);
182 set_Tuple_pred(call, pn_Call_M_except, mem);
183 set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
186 /* A mapper for the integer abs. */
187 int i_mapper_abs(ir_node *call, void *ctx) {
188 ir_node *mem = get_Call_mem(call);
189 ir_node *block = get_nodes_block(call);
190 ir_node *op = get_Call_param(call, 0);
192 dbg_info *dbg = get_irn_dbg_info(call);
195 irn = new_rd_Abs(dbg, current_ir_graph, block, op, get_irn_mode(op));
196 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
197 replace_call(irn, call, mem, NULL, NULL);
201 /* A mapper for the alloca() function. */
202 int i_mapper_alloca(ir_node *call, void *ctx) {
203 ir_node *mem = get_Call_mem(call);
204 ir_node *block = get_nodes_block(call);
205 ir_node *op = get_Call_param(call, 0);
206 ir_node *irn, *exc, *no_exc;
207 dbg_info *dbg = get_irn_dbg_info(call);
210 irn = new_rd_Alloc(dbg, current_ir_graph, block, mem, op, firm_unknown_type, stack_alloc);
211 mem = new_Proj(irn, mode_M, pn_Alloc_M);
212 no_exc = new_Proj(irn, mode_X, pn_Alloc_X_regular);
213 exc = new_Proj(irn, mode_X, pn_Alloc_X_except);
214 irn = new_Proj(irn, get_modeP_data(), pn_Alloc_res);
216 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
217 replace_call(irn, call, mem, no_exc, exc);
219 } /* i_mapper_alloca */
221 /* A mapper for the floating point sqrt. */
222 int i_mapper_sqrt(ir_node *call, void *ctx) {
225 ir_node *op = get_Call_param(call, 0);
231 tv = get_Const_tarval(op);
232 if (! tarval_is_null(tv) && !tarval_is_one(tv))
235 mem = get_Call_mem(call);
237 /* sqrt(0) = 0, sqrt(1) = 1 */
238 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
239 replace_call(op, call, mem, NULL, NULL);
241 } /* i_mapper_sqrt */
243 /* A mapper for the floating point cbrt. */
244 int i_mapper_cbrt(ir_node *call, void *ctx) {
247 ir_node *op = get_Call_param(call, 0);
253 tv = get_Const_tarval(op);
254 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
257 mem = get_Call_mem(call);
259 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
260 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
261 replace_call(op, call, mem, NULL, NULL);
263 } /* i_mapper_cbrt */
265 /* A mapper for the floating point pow. */
266 int i_mapper_pow(ir_node *call, void *ctx) {
269 ir_node *left = get_Call_param(call, 0);
270 ir_node *right = get_Call_param(call, 1);
271 ir_node *block = get_nodes_block(call);
272 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
275 if (is_Const(left) && is_Const_one(left)) {
276 /* pow (1.0, x) = 1.0 */
278 } else if (is_Const(right)) {
279 tarval *tv = get_Const_tarval(right);
280 if (tarval_is_null(tv)) {
281 /* pow(x, 0.0) = 1.0 */
282 ir_mode *mode = get_tarval_mode(tv);
283 irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
284 } else if (tarval_is_one(tv)) {
285 /* pow(x, 1.0) = x */
287 } else if (tarval_is_minus_one(tv)) {
288 /* pow(x, -1.0) = 1/x */
296 mem = get_Call_mem(call);
297 dbg = get_irn_dbg_info(call);
300 ir_mode *mode = get_irn_mode(left);
303 irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
304 quot = new_rd_Quot(dbg, current_ir_graph, block, mem, irn, left, mode, op_pin_state_pinned);
305 mem = new_r_Proj(current_ir_graph, block, quot, mode_M, pn_Quot_M);
306 irn = new_r_Proj(current_ir_graph, block, quot, mode, pn_Quot_res);
307 reg_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_regular);
308 exc_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_except);
310 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
311 replace_call(irn, call, mem, reg_jmp, exc_jmp);
315 /* A mapper for the floating point exp. */
316 int i_mapper_exp(ir_node *call, void *ctx) {
317 ir_node *val = get_Call_param(call, 0);
320 if (is_Const(val) && is_Const_null(val)) {
322 ir_node *block = get_nodes_block(call);
323 ir_mode *mode = get_irn_mode(val);
324 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
325 ir_node *mem = get_Call_mem(call);
326 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
327 replace_call(irn, call, mem, NULL, NULL);
334 * A mapper for mapping f(0.0) to 0.0.
336 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason) {
337 ir_node *val = get_Call_param(call, 0);
340 if (is_Const(val) && is_Const_null(val)) {
342 ir_node *mem = get_Call_mem(call);
343 DBG_OPT_ALGSIM0(call, val, reason);
344 replace_call(val, call, mem, NULL, NULL);
348 } /* i_mapper_zero_to_zero */
351 * A mapper for mapping f(1.0) to 0.0.
353 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason) {
354 ir_node *val = get_Call_param(call, 0);
357 if (is_Const(val) && is_Const_one(val)) {
358 /* acos(1.0) = 0.0 */
359 ir_node *block = get_nodes_block(call);
360 ir_mode *mode = get_irn_mode(val);
361 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
362 ir_node *mem = get_Call_mem(call);
363 DBG_OPT_ALGSIM0(call, irn, reason);
364 replace_call(irn, call, mem, NULL, NULL);
368 } /* i_mapper_one_to_zero */
371 * A mapper for mapping a functions with the following characteristics:
375 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason) {
376 ir_node *val = get_Call_param(call, 0);
379 if (is_strictConv(val)) {
380 ir_node *op = get_Conv_op(val);
382 /* f(-x) = f(x) with strictConv */
383 ir_node *block = get_nodes_block(call);
384 ir_mode *mode = get_irn_mode(val);
385 dbg_info *dbg = get_irn_dbg_info(val);
387 op = get_Minus_op(op);
388 val = new_rd_Conv(dbg, current_ir_graph, block, op, mode);
391 set_Conv_strict(val, 1);
393 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
394 set_Call_param(call, 0, val);
396 } else if (is_Minus(val)) {
398 val = get_Minus_op(val);
399 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
400 set_Call_param(call, 0, val);
403 if (is_Const(val) && is_Const_null(val)) {
405 ir_node *block = get_nodes_block(call);
406 ir_mode *mode = get_irn_mode(val);
407 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
408 ir_node *mem = get_Call_mem(call);
409 DBG_OPT_ALGSIM0(call, irn, reason);
410 replace_call(irn, call, mem, NULL, NULL);
414 } /* i_mapper_symmetric_zero_to_one */
416 /* A mapper for the floating point log. */
417 int i_mapper_log(ir_node *call, void *ctx) {
419 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
422 /* A mapper for the floating point sin. */
423 int i_mapper_sin(ir_node *call, void *ctx) {
425 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
428 /* A mapper for the floating point cos. */
429 int i_mapper_cos(ir_node *call, void *ctx) {
430 /* cos(0.0) = 1.0, cos(-x) = x */
431 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
434 /* A mapper for the floating point tan. */
435 int i_mapper_tan(ir_node *call, void *ctx) {
437 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
440 /* A mapper for the floating point asin. */
441 int i_mapper_asin(ir_node *call, void *ctx) {
442 /* asin(0.0) = 0.0 */
443 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
444 } /* i_mapper_asin */
446 /* A mapper for the floating point acos. */
447 int i_mapper_acos(ir_node *call, void *ctx) {
448 /* acos(1.0) = 0.0 */
449 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
450 } /* i_mapper_acos */
452 /* A mapper for the floating point atan. */
453 int i_mapper_atan(ir_node *call, void *ctx) {
454 /* atan(0.0) = 0.0 */
455 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
456 } /* i_mapper_atan */
458 /* A mapper for the floating point sinh. */
459 int i_mapper_sinh(ir_node *call, void *ctx) {
460 /* sinh(0.0) = 0.0 */
461 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
462 } /* i_mapper_sinh */
464 /* A mapper for the floating point cosh. */
465 int i_mapper_cosh(ir_node *call, void *ctx) {
466 /* cosh(0.0) = 1.0, cosh(-x) = x */
467 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
468 } /* i_mapper_cosh */
470 /* A mapper for the floating point tanh. */
471 int i_mapper_tanh(ir_node *call, void *ctx) {
472 /* tanh(0.0) = 0.0 */
473 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
474 } /* i_mapper_tanh */
477 * Return the const entity that is accessed through the pointer ptr or
478 * NULL if there is no entity (or the entity is not constant).
480 * @param ptr the pointer
482 static ir_entity *get_const_entity(ir_node *ptr) {
483 /* FIXME: this cannot handle constant strings inside struct initializers yet */
484 if (is_SymConst(ptr) && get_SymConst_kind(ptr) == symconst_addr_ent) {
485 ir_entity *ent = get_SymConst_entity(ptr);
487 if (get_entity_variability(ent) == variability_constant) {
488 /* a constant entity */
493 } /* get_const_entity */
496 * Calculate the value of strlen if possible.
498 * @param ent the entity
499 * @param res_tp the result type
501 * @return a Const node containing the strlen() result or NULL
502 * if the evaluation fails
504 static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp) {
505 ir_type *tp = get_entity_type(ent);
509 if (! is_Array_type(tp))
511 tp = get_array_element_type(tp);
512 if (! is_Primitive_type(tp))
514 mode = get_type_mode(tp);
516 /* FIXME: This is too restrict, as the type char might be more the 8bits */
517 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
520 n = get_compound_ent_n_values(ent);
521 for (i = 0; i < n; ++i) {
522 ir_node *irn = get_compound_ent_value(ent, i);
527 if (is_Const_null(irn)) {
528 /* found the length */
534 tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
535 return new_Const_type(tv, res_tp);
540 /* A mapper for strlen */
541 int i_mapper_strlen(ir_node *call, void *ctx) {
542 ir_node *s = get_Call_param(call, 0);
543 ir_entity *ent = get_const_entity(s);
547 /* FIXME: this cannot handle constant strings inside struct initializers yet */
549 /* a constant entity */
550 ir_type *tp = get_Call_type(call);
553 tp = get_method_res_type(tp, 0);
554 irn = eval_strlen(ent, tp);
557 ir_node *mem = get_Call_mem(call);
558 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
559 replace_call(irn, call, mem, NULL, NULL);
564 } /* i_mapper_strlen */
567 * Calculate the value of strlen if possible.
569 * @param left the left entity
570 * @param right the right entity
571 * @param res_tp the result type
573 * @return a Const node containing the strcmp() result or NULL
574 * if the evaluation fails
576 static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp) {
581 tp = get_entity_type(left);
582 if (! is_Array_type(tp))
584 tp = get_array_element_type(tp);
585 if (! is_Primitive_type(tp))
587 mode = get_type_mode(tp);
589 /* FIXME: This is too restrict, as the type char might be more the 8bits */
590 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
593 tp = get_entity_type(right);
594 if (! is_Array_type(tp))
596 tp = get_array_element_type(tp);
597 if (! is_Primitive_type(tp))
599 mode = get_type_mode(tp);
601 /* FIXME: This is too restrict, as the type char might be more the 8bits */
602 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
605 n = get_compound_ent_n_values(left);
606 n_r = get_compound_ent_n_values(right);
609 for (i = 0; i < n; ++i) {
614 irn = get_compound_ent_value(left, i);
617 tv = get_Const_tarval(irn);
618 v_l = get_tarval_long(tv);
620 irn = get_compound_ent_value(right, i);
623 tv = get_Const_tarval(irn);
624 v_r = get_tarval_long(tv);
641 /* we found an end */
642 tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
643 return new_Const_type(tv, res_tp);
649 * Checks if an entity represents the empty string.
651 * @param ent the entity
653 * @return non-zero if ent represents the empty string
655 static int is_empty_string(ir_entity *ent) {
656 ir_type *tp = get_entity_type(ent);
661 if (! is_Array_type(tp))
663 tp = get_array_element_type(tp);
664 if (! is_Primitive_type(tp))
666 mode = get_type_mode(tp);
668 /* FIXME: This is too restrict, as the type char might be more the 8bits */
669 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
672 n = get_compound_ent_n_values(ent);
675 irn = get_compound_ent_value(ent, 0);
677 return is_Const(irn) && is_Const_null(irn);
678 } /* is_empty_string */
680 /* A mapper for strcmp */
681 int i_mapper_strcmp(ir_node *call, void *ctx) {
682 ir_node *left = get_Call_param(call, 0);
683 ir_node *right = get_Call_param(call, 1);
687 ir_node *adr = get_Call_ptr(call);
688 ir_entity *ent = get_SymConst_entity(adr);
689 ir_type *call_tp = get_entity_type(ent);
690 ir_type *res_tp = get_method_res_type(call_tp, 0);
691 ir_entity *ent_l, *ent_r;
697 /* do some type checks first */
698 if (! is_Primitive_type(res_tp))
700 char_tp = get_method_param_type(call_tp, 0);
701 if (char_tp != get_method_param_type(call_tp, 1))
703 if (! is_Pointer_type(char_tp))
705 char_tp = get_pointer_points_to_type(char_tp);
708 /* a strcmp(s, s) ==> 0 */
709 ir_node *mem = get_Call_mem(call);
710 ir_mode *mode = get_type_mode(res_tp);
711 ir_node *block = get_nodes_block(call);
713 irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
714 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
715 replace_call(irn, call, mem, NULL, NULL);
718 ent_l = get_const_entity(left);
719 ent_r = get_const_entity(right);
721 if (ent_l != NULL && ent_r != NULL) {
722 /* both entities are const, try to evaluate */
723 irn = eval_strcmp(ent_l, ent_r, res_tp);
724 } else if (ent_l != NULL) {
725 if (is_empty_string(ent_l)) {
726 /* s strcmp("", s) ==> -(*s)*/
728 goto replace_by_call;
730 } else if (ent_r != NULL) {
731 if (is_empty_string(ent_r)) {
732 /* s strcmp(s, "") ==> (*s) */
733 ir_node *mem, *block;
739 mem = get_Call_mem(call);
740 block = get_nodes_block(call);
741 dbg = get_irn_dbg_info(call);
742 mode = get_type_mode(char_tp);
744 /* replace the strcmp by (*x) */
745 irn = new_rd_Load(dbg, current_ir_graph, block, mem, v, mode);
746 mem = new_r_Proj(current_ir_graph, block, irn, mode_M, pn_Load_M);
747 exc = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_except);
748 reg = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_regular);
749 irn = new_r_Proj(current_ir_graph, block, irn, mode, pn_Load_res);
751 /* conv to the result mode */
752 mode = get_type_mode(res_tp);
753 irn = new_rd_Conv(dbg, current_ir_graph, block, irn, mode);
756 /* negate in the ("", s) case */
757 irn = new_rd_Minus(dbg, current_ir_graph, block, irn, mode);
763 ir_node *mem = get_Call_mem(call);
764 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
765 replace_call(irn, call, mem, reg, exc);
770 } /* i_mapper_strcmp */
772 /* A mapper for strncmp */
773 int i_mapper_strncmp(ir_node *call, void *ctx) {
774 ir_node *left = get_Call_param(call, 0);
775 ir_node *right = get_Call_param(call, 1);
776 ir_node *len = get_Call_param(call, 2);
780 if (left == right || (is_Const(len) && is_Const_null(len))) {
781 /* a strncmp(s, s, len) ==> 0 OR
782 a strncmp(a, b, 0) ==> 0 */
783 ir_node *mem = get_Call_mem(call);
784 ir_node *adr = get_Call_ptr(call);
785 ir_entity *ent = get_SymConst_entity(adr);
786 ir_type *call_tp = get_entity_type(ent);
787 ir_type *res_tp = get_method_res_type(call_tp, 0);
788 ir_mode *mode = get_type_mode(res_tp);
789 ir_node *block = get_nodes_block(call);
791 irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
792 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
793 replace_call(irn, call, mem, NULL, NULL);
797 } /* i_mapper_strncmp */
799 /* A mapper for memcpy */
800 int i_mapper_memcpy(ir_node *call, void *ctx) {
801 ir_node *len = get_Call_param(call, 2);
804 if (is_Const(len) && is_Const_null(len)) {
805 /* a memcpy(d, s, 0) ==> d */
806 ir_node *mem = get_Call_mem(call);
807 ir_node *dst = get_Call_param(call, 0);
809 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
810 replace_call(dst, call, mem, NULL, NULL);
814 } /* i_mapper_memcpy */
816 /* A mapper for memset */
817 int i_mapper_memset(ir_node *call, void *ctx) {
818 ir_node *len = get_Call_param(call, 2);
821 if (is_Const(len) && is_Const_null(len)) {
822 /* a memset(d, C, 0) ==> d */
823 ir_node *mem = get_Call_mem(call);
824 ir_node *dst = get_Call_param(call, 0);
826 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
827 replace_call(dst, call, mem, NULL, NULL);
831 } /* i_mapper_memset */
834 * Returns the result mode of a node.
836 static ir_mode *get_irn_res_mode(ir_node *node) {
837 switch (get_irn_opcode(node)) {
838 case iro_Load: return get_Load_mode(node);
839 case iro_Quot: return get_Quot_resmode(node);
840 case iro_Div: return get_Div_resmode(node);
841 case iro_Mod: return get_Mod_resmode(node);
842 case iro_DivMod: return get_DivMod_resmode(node);
843 default: return NULL;
845 } /* get_irn_res_mode */
847 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
849 /* A mapper for mapping unsupported instructions to runtime calls. */
850 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) {
851 int i, j, arity, first, n_param, n_res;
854 ir_node *mem, *bl, *call, *addr, *res_proj;
858 ir_mode *mode = get_irn_mode(node);
860 if (mode != rt->mode)
862 /* check if the result modes match */
863 if (mode == mode_T && rt->res_mode != NULL) {
864 mode = get_irn_res_mode(node);
865 if (mode != rt->res_mode)
869 arity = get_irn_arity(node);
873 mtp = get_entity_type(rt->ent);
874 n_param = get_method_n_params(mtp);
875 irg = current_ir_graph;
877 mem = get_irn_n(node, 0);
878 if (get_irn_mode(mem) != mode_M) {
879 mem = new_r_NoMem(irg);
884 /* check if the modes of the predecessors match the parameter modes */
885 if (arity - first != n_param)
888 for (i = first, j = 0; i < arity; ++i, ++j) {
889 ir_type *param_tp = get_method_param_type(mtp, j);
890 ir_node *pred = get_irn_n(node, i);
892 if (get_type_mode(param_tp) != get_irn_mode(pred))
896 n_res = get_method_n_ress(mtp);
898 /* step 0: calculate the number of needed Proj's */
900 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
901 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
902 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
903 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
904 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
907 if (rt->mode != mode_T) /* must be mode_T */
912 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
916 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
917 bl = get_nodes_block(node);
921 NEW_ARR_A(ir_node *, in, n_param);
922 for (i = 0; i < n_param; ++i)
923 in[i] = get_irn_n(node, first + i);
926 /* step 1: create the call */
927 sym.entity_p = rt->ent;
928 addr = new_r_SymConst(irg, bl, mode_P_code, sym, symconst_addr_ent);
929 call = new_rd_Call(get_irn_dbg_info(node), irg, bl, mem, addr, n_param, in, mtp);
930 set_irn_pinned(call, get_irn_pinned(node));
933 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
941 turn_into_tuple(node, n_proj);
943 for (i = 0; i < n_proj; ++i)
944 set_Tuple_pred(node, i, new_r_Bad(irg));
945 if (rt->mem_proj_nr >= 0)
946 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_regular));
947 if (get_irn_op(mem) != op_NoMem) {
948 /* Exceptions can only be handled with real memory */
949 if (rt->regular_proj_nr >= 0)
950 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_regular));
951 if (rt->exc_proj_nr >= 0)
952 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_except));
953 if (rt->exc_mem_proj_nr >= 0)
954 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_except));
957 if (rt->res_proj_nr >= 0)
958 for (i = 0; i < n_res; ++i)
959 set_Tuple_pred(node, rt->res_proj_nr + i,
960 new_r_Proj(irg, bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
963 /* only one return value supported */
965 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
967 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
968 res_proj = new_r_Proj(irg, bl, res_proj, mode, 0);
970 exchange(node, res_proj);
974 /* should not happen */
976 } /* i_mapper_RuntimeCall */