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"
46 /** Walker environment. */
47 typedef struct _walker_env {
48 pmap *c_map; /**< The intrinsic call map. */
49 unsigned nr_of_intrinsics; /**< statistics */
50 i_instr_record **i_map; /**< The intrinsic instruction map. */
54 * walker: call all mapper functions
56 static void call_mapper(ir_node *node, void *env) {
57 walker_env_t *wenv = env;
58 ir_op *op = get_irn_op(node);
63 const i_call_record *r;
66 symconst = get_Call_ptr(node);
67 if (! is_Global(symconst))
70 ent = get_Global_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 > 0) {
131 /* Changes detected: we might have added/removed nodes. */
132 set_irg_outs_inconsistent(irg);
133 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
135 /* Exception control flow might have changed / new block might have added. */
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();
144 irg_verify(irg, VRFY_NORMAL);
146 /* Optimize it, tuple might be created. */
147 optimize_graph_df(irg);
149 nr_of_intrinsics += wenv.nr_of_intrinsics;
154 return nr_of_intrinsics;
155 } /* lower_intrinsics */
158 * Helper function, replace the call by the given node.
160 * @param irn the result node
161 * @param call the call to replace
162 * @param mem the new mem result
163 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
164 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
166 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp) {
167 ir_node *block = get_nodes_block(call);
169 if (reg_jmp == NULL) {
171 /* Beware: do we need here a protection against CSE? Better we do it. */
172 int old_cse = get_opt_cse();
174 reg_jmp = new_r_Jmp(current_ir_graph, block);
175 set_opt_cse(old_cse);
178 irn = new_r_Tuple(current_ir_graph, block, 1, &irn);
180 turn_into_tuple(call, pn_Call_max);
181 set_Tuple_pred(call, pn_Call_M_regular, mem);
182 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
183 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
184 set_Tuple_pred(call, pn_Call_T_result, irn);
185 set_Tuple_pred(call, pn_Call_M_except, mem);
186 set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
189 /* A mapper for the integer abs. */
190 int i_mapper_abs(ir_node *call, void *ctx) {
191 ir_node *mem = get_Call_mem(call);
192 ir_node *block = get_nodes_block(call);
193 ir_node *op = get_Call_param(call, 0);
195 dbg_info *dbg = get_irn_dbg_info(call);
198 irn = new_rd_Abs(dbg, current_ir_graph, block, op, get_irn_mode(op));
199 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
200 replace_call(irn, call, mem, NULL, NULL);
204 /* A mapper for the alloca() function. */
205 int i_mapper_alloca(ir_node *call, void *ctx) {
206 ir_node *mem = get_Call_mem(call);
207 ir_node *block = get_nodes_block(call);
208 ir_node *op = get_Call_param(call, 0);
209 ir_node *irn, *exc, *no_exc;
210 dbg_info *dbg = get_irn_dbg_info(call);
213 if (mode_is_signed(get_irn_mode(op))) {
214 op = new_rd_Conv(dbg, current_ir_graph, block, op, mode_Iu);
217 irn = new_rd_Alloc(dbg, current_ir_graph, block, mem, op, firm_unknown_type, stack_alloc);
218 mem = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_M, pn_Alloc_M);
219 no_exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_regular);
220 exc = new_rd_Proj(dbg, current_ir_graph, block, irn, mode_X, pn_Alloc_X_except);
221 irn = new_rd_Proj(dbg, current_ir_graph, block, irn, get_modeP_data(), pn_Alloc_res);
223 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
224 replace_call(irn, call, mem, no_exc, exc);
226 } /* i_mapper_alloca */
228 /* A mapper for the floating point sqrt. */
229 int i_mapper_sqrt(ir_node *call, void *ctx) {
232 ir_node *op = get_Call_param(call, 0);
238 tv = get_Const_tarval(op);
239 if (! tarval_is_null(tv) && !tarval_is_one(tv))
242 mem = get_Call_mem(call);
244 /* sqrt(0) = 0, sqrt(1) = 1 */
245 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
246 replace_call(op, call, mem, NULL, NULL);
248 } /* i_mapper_sqrt */
250 /* A mapper for the floating point cbrt. */
251 int i_mapper_cbrt(ir_node *call, void *ctx) {
254 ir_node *op = get_Call_param(call, 0);
260 tv = get_Const_tarval(op);
261 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
264 mem = get_Call_mem(call);
266 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
267 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
268 replace_call(op, call, mem, NULL, NULL);
270 } /* i_mapper_cbrt */
272 /* A mapper for the floating point pow. */
273 int i_mapper_pow(ir_node *call, void *ctx) {
276 ir_node *left = get_Call_param(call, 0);
277 ir_node *right = get_Call_param(call, 1);
278 ir_node *block = get_nodes_block(call);
279 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
282 if (is_Const(left) && is_Const_one(left)) {
283 /* pow (1.0, x) = 1.0 */
285 } else if (is_Const(right)) {
286 tarval *tv = get_Const_tarval(right);
287 if (tarval_is_null(tv)) {
288 /* pow(x, 0.0) = 1.0 */
289 ir_mode *mode = get_tarval_mode(tv);
290 irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
291 } else if (tarval_is_one(tv)) {
292 /* pow(x, 1.0) = x */
294 } else if (tarval_is_minus_one(tv)) {
295 /* pow(x, -1.0) = 1/x */
303 mem = get_Call_mem(call);
304 dbg = get_irn_dbg_info(call);
307 ir_mode *mode = get_irn_mode(left);
310 irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
311 quot = new_rd_Quot(dbg, current_ir_graph, block, mem, irn, left, mode, op_pin_state_pinned);
312 mem = new_r_Proj(current_ir_graph, block, quot, mode_M, pn_Quot_M);
313 irn = new_r_Proj(current_ir_graph, block, quot, mode, pn_Quot_res);
314 reg_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_regular);
315 exc_jmp = new_r_Proj(current_ir_graph, block, quot, mode_X, pn_Quot_X_except);
317 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
318 replace_call(irn, call, mem, reg_jmp, exc_jmp);
322 /* A mapper for the floating point exp. */
323 int i_mapper_exp(ir_node *call, void *ctx) {
324 ir_node *val = get_Call_param(call, 0);
327 if (is_Const(val) && is_Const_null(val)) {
329 ir_node *block = get_nodes_block(call);
330 ir_mode *mode = get_irn_mode(val);
331 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
332 ir_node *mem = get_Call_mem(call);
333 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
334 replace_call(irn, call, mem, NULL, NULL);
341 * A mapper for mapping f(0.0) to 0.0.
343 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason) {
344 ir_node *val = get_Call_param(call, 0);
347 if (is_Const(val) && is_Const_null(val)) {
349 ir_node *mem = get_Call_mem(call);
350 DBG_OPT_ALGSIM0(call, val, reason);
351 replace_call(val, call, mem, NULL, NULL);
355 } /* i_mapper_zero_to_zero */
358 * A mapper for mapping f(1.0) to 0.0.
360 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason) {
361 ir_node *val = get_Call_param(call, 0);
364 if (is_Const(val) && is_Const_one(val)) {
365 /* acos(1.0) = 0.0 */
366 ir_node *block = get_nodes_block(call);
367 ir_mode *mode = get_irn_mode(val);
368 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
369 ir_node *mem = get_Call_mem(call);
370 DBG_OPT_ALGSIM0(call, irn, reason);
371 replace_call(irn, call, mem, NULL, NULL);
375 } /* i_mapper_one_to_zero */
378 * A mapper for mapping a functions with the following characteristics:
382 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason) {
383 ir_node *val = get_Call_param(call, 0);
386 if (is_strictConv(val)) {
387 ir_node *op = get_Conv_op(val);
389 /* f(-x) = f(x) with strictConv */
390 ir_node *block = get_nodes_block(call);
391 ir_mode *mode = get_irn_mode(val);
392 dbg_info *dbg = get_irn_dbg_info(val);
394 op = get_Minus_op(op);
395 val = new_rd_Conv(dbg, current_ir_graph, block, op, mode);
398 set_Conv_strict(val, 1);
400 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
401 set_Call_param(call, 0, val);
403 } else if (is_Minus(val)) {
405 val = get_Minus_op(val);
406 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
407 set_Call_param(call, 0, val);
410 if (is_Const(val) && is_Const_null(val)) {
412 ir_node *block = get_nodes_block(call);
413 ir_mode *mode = get_irn_mode(val);
414 ir_node *irn = new_r_Const(current_ir_graph, block, mode, get_mode_one(mode));
415 ir_node *mem = get_Call_mem(call);
416 DBG_OPT_ALGSIM0(call, irn, reason);
417 replace_call(irn, call, mem, NULL, NULL);
421 } /* i_mapper_symmetric_zero_to_one */
423 /* A mapper for the floating point log. */
424 int i_mapper_log(ir_node *call, void *ctx) {
426 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
429 /* A mapper for the floating point sin. */
430 int i_mapper_sin(ir_node *call, void *ctx) {
432 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
435 /* A mapper for the floating point cos. */
436 int i_mapper_cos(ir_node *call, void *ctx) {
437 /* cos(0.0) = 1.0, cos(-x) = x */
438 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
441 /* A mapper for the floating point tan. */
442 int i_mapper_tan(ir_node *call, void *ctx) {
444 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
447 /* A mapper for the floating point asin. */
448 int i_mapper_asin(ir_node *call, void *ctx) {
449 /* asin(0.0) = 0.0 */
450 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
451 } /* i_mapper_asin */
453 /* A mapper for the floating point acos. */
454 int i_mapper_acos(ir_node *call, void *ctx) {
455 /* acos(1.0) = 0.0 */
456 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
457 } /* i_mapper_acos */
459 /* A mapper for the floating point atan. */
460 int i_mapper_atan(ir_node *call, void *ctx) {
461 /* atan(0.0) = 0.0 */
462 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
463 } /* i_mapper_atan */
465 /* A mapper for the floating point sinh. */
466 int i_mapper_sinh(ir_node *call, void *ctx) {
467 /* sinh(0.0) = 0.0 */
468 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
469 } /* i_mapper_sinh */
471 /* A mapper for the floating point cosh. */
472 int i_mapper_cosh(ir_node *call, void *ctx) {
473 /* cosh(0.0) = 1.0, cosh(-x) = x */
474 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
475 } /* i_mapper_cosh */
477 /* A mapper for the floating point tanh. */
478 int i_mapper_tanh(ir_node *call, void *ctx) {
479 /* tanh(0.0) = 0.0 */
480 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
481 } /* i_mapper_tanh */
484 * Return the const entity that is accessed through the pointer ptr or
485 * NULL if there is no entity (or the entity is not constant).
487 * @param ptr the pointer
489 static ir_entity *get_const_entity(ir_node *ptr) {
490 /* FIXME: this cannot handle constant strings inside struct initializers yet */
491 if (is_Global(ptr)) {
492 ir_entity *ent = get_Global_entity(ptr);
494 if (get_entity_variability(ent) == variability_constant) {
495 /* a constant entity */
500 } /* get_const_entity */
503 * Calculate the value of strlen if possible.
505 * @param ent the entity
506 * @param res_tp the result type
508 * @return a Const node containing the strlen() result or NULL
509 * if the evaluation fails
511 static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp) {
512 ir_type *tp = get_entity_type(ent);
516 if (! is_Array_type(tp))
518 tp = get_array_element_type(tp);
519 if (! is_Primitive_type(tp))
521 mode = get_type_mode(tp);
523 /* FIXME: This is too restrict, as the type char might be more the 8bits */
524 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
527 n = get_compound_ent_n_values(ent);
528 for (i = 0; i < n; ++i) {
529 ir_node *irn = get_compound_ent_value(ent, i);
534 if (is_Const_null(irn)) {
535 /* found the length */
541 tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
542 return new_Const_type(tv, res_tp);
547 /* A mapper for strlen */
548 int i_mapper_strlen(ir_node *call, void *ctx) {
549 ir_node *s = get_Call_param(call, 0);
550 ir_entity *ent = get_const_entity(s);
554 /* FIXME: this cannot handle constant strings inside struct initializers yet */
556 /* a constant entity */
557 ir_type *tp = get_Call_type(call);
560 tp = get_method_res_type(tp, 0);
561 irn = eval_strlen(ent, tp);
564 ir_node *mem = get_Call_mem(call);
565 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
566 replace_call(irn, call, mem, NULL, NULL);
571 } /* i_mapper_strlen */
574 * Calculate the value of strlen if possible.
576 * @param left the left entity
577 * @param right the right entity
578 * @param res_tp the result type
580 * @return a Const node containing the strcmp() result or NULL
581 * if the evaluation fails
583 static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp) {
588 tp = get_entity_type(left);
589 if (! is_Array_type(tp))
591 tp = get_array_element_type(tp);
592 if (! is_Primitive_type(tp))
594 mode = get_type_mode(tp);
596 /* FIXME: This is too restrict, as the type char might be more the 8bits */
597 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
600 tp = get_entity_type(right);
601 if (! is_Array_type(tp))
603 tp = get_array_element_type(tp);
604 if (! is_Primitive_type(tp))
606 mode = get_type_mode(tp);
608 /* FIXME: This is too restrict, as the type char might be more the 8bits */
609 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
612 n = get_compound_ent_n_values(left);
613 n_r = get_compound_ent_n_values(right);
616 for (i = 0; i < n; ++i) {
621 irn = get_compound_ent_value(left, i);
624 tv = get_Const_tarval(irn);
625 v_l = get_tarval_long(tv);
627 irn = get_compound_ent_value(right, i);
630 tv = get_Const_tarval(irn);
631 v_r = get_tarval_long(tv);
648 /* we found an end */
649 tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
650 return new_Const_type(tv, res_tp);
656 * Checks if an entity represents the empty string.
658 * @param ent the entity
660 * @return non-zero if ent represents the empty string
662 static int is_empty_string(ir_entity *ent) {
663 ir_type *tp = get_entity_type(ent);
668 if (! is_Array_type(tp))
670 tp = get_array_element_type(tp);
671 if (! is_Primitive_type(tp))
673 mode = get_type_mode(tp);
675 /* FIXME: This is too restrict, as the type char might be more the 8bits */
676 if (!mode_is_int(mode) || get_mode_size_bits(mode) != get_mode_size_bits(mode_Bs))
679 n = get_compound_ent_n_values(ent);
682 irn = get_compound_ent_value(ent, 0);
684 return is_Const(irn) && is_Const_null(irn);
685 } /* is_empty_string */
687 /* A mapper for strcmp */
688 int i_mapper_strcmp(ir_node *call, void *ctx) {
689 ir_node *left = get_Call_param(call, 0);
690 ir_node *right = get_Call_param(call, 1);
694 ir_type *call_tp = get_Call_type(call);
695 ir_type *res_tp = get_method_res_type(call_tp, 0);
696 ir_entity *ent_l, *ent_r;
702 /* do some type checks first */
703 if (! is_Primitive_type(res_tp))
705 char_tp = get_method_param_type(call_tp, 0);
706 if (char_tp != get_method_param_type(call_tp, 1))
708 if (! is_Pointer_type(char_tp))
710 char_tp = get_pointer_points_to_type(char_tp);
713 /* a strcmp(s, s) ==> 0 */
714 ir_node *mem = get_Call_mem(call);
715 ir_mode *mode = get_type_mode(res_tp);
716 ir_node *block = get_nodes_block(call);
718 irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
719 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
720 replace_call(irn, call, mem, NULL, NULL);
723 ent_l = get_const_entity(left);
724 ent_r = get_const_entity(right);
726 if (ent_l != NULL && ent_r != NULL) {
727 /* both entities are const, try to evaluate */
728 irn = eval_strcmp(ent_l, ent_r, res_tp);
729 } else if (ent_l != NULL) {
730 if (is_empty_string(ent_l)) {
731 /* s strcmp("", s) ==> -(*s)*/
733 goto replace_by_call;
735 } else if (ent_r != NULL) {
736 if (is_empty_string(ent_r)) {
737 /* s strcmp(s, "") ==> (*s) */
738 ir_node *mem, *block;
744 mem = get_Call_mem(call);
745 block = get_nodes_block(call);
746 dbg = get_irn_dbg_info(call);
747 mode = get_type_mode(char_tp);
749 /* replace the strcmp by (*x) */
750 irn = new_rd_Load(dbg, current_ir_graph, block, mem, v, mode);
751 mem = new_r_Proj(current_ir_graph, block, irn, mode_M, pn_Load_M);
752 exc = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_except);
753 reg = new_r_Proj(current_ir_graph, block, irn, mode_X, pn_Load_X_regular);
754 irn = new_r_Proj(current_ir_graph, block, irn, mode, pn_Load_res);
756 /* conv to the result mode */
757 mode = get_type_mode(res_tp);
758 irn = new_rd_Conv(dbg, current_ir_graph, block, irn, mode);
761 /* negate in the ("", s) case */
762 irn = new_rd_Minus(dbg, current_ir_graph, block, irn, mode);
768 ir_node *mem = get_Call_mem(call);
769 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
770 replace_call(irn, call, mem, reg, exc);
775 } /* i_mapper_strcmp */
777 /* A mapper for strncmp */
778 int i_mapper_strncmp(ir_node *call, void *ctx) {
779 ir_node *left = get_Call_param(call, 0);
780 ir_node *right = get_Call_param(call, 1);
781 ir_node *len = get_Call_param(call, 2);
785 if (left == right || (is_Const(len) && is_Const_null(len))) {
786 /* a strncmp(s, s, len) ==> 0 OR
787 a strncmp(a, b, 0) ==> 0 */
788 ir_node *mem = get_Call_mem(call);
789 ir_node *adr = get_Call_ptr(call);
790 ir_entity *ent = get_SymConst_entity(adr);
791 ir_type *call_tp = get_entity_type(ent);
792 ir_type *res_tp = get_method_res_type(call_tp, 0);
793 ir_mode *mode = get_type_mode(res_tp);
794 ir_node *block = get_nodes_block(call);
796 irn = new_r_Const(current_ir_graph, block, mode, get_mode_null(mode));
797 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
798 replace_call(irn, call, mem, NULL, NULL);
802 } /* i_mapper_strncmp */
804 /* A mapper for memcpy */
805 int i_mapper_memcpy(ir_node *call, void *ctx) {
806 ir_node *len = get_Call_param(call, 2);
809 if (is_Const(len) && is_Const_null(len)) {
810 /* a memcpy(d, s, 0) ==> d */
811 ir_node *mem = get_Call_mem(call);
812 ir_node *dst = get_Call_param(call, 0);
814 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
815 replace_call(dst, call, mem, NULL, NULL);
819 } /* i_mapper_memcpy */
821 /* A mapper for memset */
822 int i_mapper_memset(ir_node *call, void *ctx) {
823 ir_node *len = get_Call_param(call, 2);
826 if (is_Const(len) && is_Const_null(len)) {
827 /* a memset(d, C, 0) ==> d */
828 ir_node *mem = get_Call_mem(call);
829 ir_node *dst = get_Call_param(call, 0);
831 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
832 replace_call(dst, call, mem, NULL, NULL);
836 } /* i_mapper_memset */
839 * Returns the result mode of a node.
841 static ir_mode *get_irn_res_mode(ir_node *node) {
842 switch (get_irn_opcode(node)) {
843 case iro_Load: return get_Load_mode(node);
844 case iro_Quot: return get_Quot_resmode(node);
845 case iro_Div: return get_Div_resmode(node);
846 case iro_Mod: return get_Mod_resmode(node);
847 case iro_DivMod: return get_DivMod_resmode(node);
848 default: return NULL;
850 } /* get_irn_res_mode */
852 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
854 /* A mapper for mapping unsupported instructions to runtime calls. */
855 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) {
856 int i, j, arity, first, n_param, n_res;
859 ir_node *mem, *bl, *call, *addr, *res_proj;
863 ir_mode *mode = get_irn_mode(node);
865 if (mode != rt->mode)
867 /* check if the result modes match */
868 if (mode == mode_T && rt->res_mode != NULL) {
869 mode = get_irn_res_mode(node);
870 if (mode != rt->res_mode)
874 arity = get_irn_arity(node);
878 mtp = get_entity_type(rt->ent);
879 n_param = get_method_n_params(mtp);
880 irg = current_ir_graph;
882 mem = get_irn_n(node, 0);
883 if (get_irn_mode(mem) != mode_M) {
884 mem = new_r_NoMem(irg);
889 /* check if the modes of the predecessors match the parameter modes */
890 if (arity - first != n_param)
893 for (i = first, j = 0; i < arity; ++i, ++j) {
894 ir_type *param_tp = get_method_param_type(mtp, j);
895 ir_node *pred = get_irn_n(node, i);
897 if (get_type_mode(param_tp) != get_irn_mode(pred))
901 n_res = get_method_n_ress(mtp);
903 /* step 0: calculate the number of needed Proj's */
905 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
906 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
907 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
908 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
909 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
912 if (rt->mode != mode_T) /* must be mode_T */
917 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
921 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
922 bl = get_nodes_block(node);
926 NEW_ARR_A(ir_node *, in, n_param);
927 for (i = 0; i < n_param; ++i)
928 in[i] = get_irn_n(node, first + i);
931 /* step 1: create the call */
932 sym.entity_p = rt->ent;
933 addr = new_r_SymConst(irg, bl, mode_P_code, sym, symconst_addr_ent);
934 call = new_rd_Call(get_irn_dbg_info(node), irg, bl, mem, addr, n_param, in, mtp);
935 set_irn_pinned(call, get_irn_pinned(node));
938 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
946 turn_into_tuple(node, n_proj);
948 for (i = 0; i < n_proj; ++i)
949 set_Tuple_pred(node, i, new_r_Bad(irg));
950 if (rt->mem_proj_nr >= 0)
951 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_regular));
952 if (get_irn_op(mem) != op_NoMem) {
953 /* Exceptions can only be handled with real memory */
954 if (rt->regular_proj_nr >= 0)
955 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_regular));
956 if (rt->exc_proj_nr >= 0)
957 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(irg, bl, call, mode_X, pn_Call_X_except));
958 if (rt->exc_mem_proj_nr >= 0)
959 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(irg, bl, call, mode_M, pn_Call_M_except));
962 if (rt->res_proj_nr >= 0)
963 for (i = 0; i < n_res; ++i)
964 set_Tuple_pred(node, rt->res_proj_nr + i,
965 new_r_Proj(irg, bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
968 /* only one return value supported */
970 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
972 res_proj = new_r_Proj(irg, bl, call, mode_T, pn_Call_T_result);
973 res_proj = new_r_Proj(irg, bl, res_proj, mode, 0);
975 exchange(node, res_proj);
979 /* should not happen */
981 } /* i_mapper_RuntimeCall */