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
43 #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);
124 if (part_block_used) {
125 ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
126 collect_phiprojs(irg);
129 wenv.nr_of_intrinsics = 0;
130 irg_walk_graph(irg, NULL, call_mapper, &wenv);
133 ir_free_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
135 if (wenv.nr_of_intrinsics > 0) {
136 /* Changes detected: we might have added/removed nodes. */
137 set_irg_outs_inconsistent(irg);
138 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
140 /* Exception control flow might have changed / new block might have added. */
141 set_irg_doms_inconsistent(irg);
142 set_irg_extblk_inconsistent(irg);
143 set_irg_loopinfo_inconsistent(irg);
145 /* Calls might be removed/added. */
146 set_trouts_inconsistent();
149 irg_verify(irg, VRFY_NORMAL);
151 /* Optimize it, tuple might be created. */
152 optimize_graph_df(irg);
154 nr_of_intrinsics += wenv.nr_of_intrinsics;
159 return nr_of_intrinsics;
160 } /* lower_intrinsics */
171 * Wrapper for running lower_intrinsics() as an ir_prog pass.
173 static int pass_wrapper(ir_prog *irp, void *context)
175 struct pass_t *pass = context;
176 lower_intrinsics(pass->list, pass->length, pass->part_block_used);
177 /* probably this pass should not run again */
182 * Creates an ir_prog pass for lower_intrinsics.
184 * @param name the name of this pass or NULL
185 * @param list an array of intrinsic map records
186 * @param length the length of the array
187 * @param part_block_used set to true if part_block() must be using during lowering
189 ir_prog_pass_t *lower_intrinsics_pass(
191 i_record *list, int length, int part_block_used)
193 struct pass_t *pass = xmalloc(sizeof(*pass) + (length-1) * sizeof(pass->list[0]));
195 memset(&pass->pass, 0, sizeof(pass->pass));
196 pass->pass.kind = k_ir_prog_pass;
197 pass->pass.run_on_irprog = pass_wrapper;
198 pass->pass.context = pass;
199 pass->pass.name = name ? name : "lower_intrinsics";
201 INIT_LIST_HEAD(&pass->pass.list);
203 memcpy(pass->list, list, sizeof(list[0]) * length);
204 pass->length = length;
205 pass->part_block_used = part_block_used;
208 } /* lower_intrinsics_pass*/
211 * Helper function, replace the call by the given node.
213 * @param irn the result node
214 * @param call the call to replace
215 * @param mem the new mem result
216 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
217 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
219 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp) {
220 ir_node *block = get_nodes_block(call);
222 if (reg_jmp == NULL) {
224 /* Beware: do we need here a protection against CSE? Better we do it. */
225 int old_cse = get_opt_cse();
227 reg_jmp = new_r_Jmp(block);
228 set_opt_cse(old_cse);
231 irn = new_r_Tuple(block, 1, &irn);
233 turn_into_tuple(call, pn_Call_max);
234 set_Tuple_pred(call, pn_Call_M_regular, mem);
235 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
236 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
237 set_Tuple_pred(call, pn_Call_T_result, irn);
238 set_Tuple_pred(call, pn_Call_M_except, mem);
239 set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
242 /* A mapper for the integer abs. */
243 int i_mapper_abs(ir_node *call, void *ctx) {
244 ir_node *mem = get_Call_mem(call);
245 ir_node *block = get_nodes_block(call);
246 ir_node *op = get_Call_param(call, 0);
248 dbg_info *dbg = get_irn_dbg_info(call);
251 irn = new_rd_Abs(dbg, block, op, get_irn_mode(op));
252 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
253 replace_call(irn, call, mem, NULL, NULL);
257 /* A mapper for the integer bswap. */
258 int i_mapper_bswap(ir_node *call, void *ctx) {
259 ir_node *mem = get_Call_mem(call);
260 ir_node *block = get_nodes_block(call);
261 ir_node *op = get_Call_param(call, 0);
262 ir_type *tp = get_Call_type(call);
263 dbg_info *dbg = get_irn_dbg_info(call);
267 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
268 set_irn_pinned(irn, op_pin_state_floats);
269 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
270 irn = new_r_Proj(block, irn, get_irn_mode(op), pn_Builtin_1_result);
271 replace_call(irn, call, mem, NULL, NULL);
273 } /* i_mapper_bswap */
275 /* A mapper for the alloca() function. */
276 int i_mapper_alloca(ir_node *call, void *ctx) {
277 ir_node *mem = get_Call_mem(call);
278 ir_node *block = get_nodes_block(call);
279 ir_node *op = get_Call_param(call, 0);
280 ir_node *irn, *exc, *no_exc;
281 dbg_info *dbg = get_irn_dbg_info(call);
284 if (mode_is_signed(get_irn_mode(op))) {
285 ir_mode *mode = get_irn_mode(op);
286 mode = find_unsigned_mode(mode);
288 panic("Cannot find unsigned mode for %M", mode);
290 op = new_rd_Conv(dbg, block, op, mode);
293 irn = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
294 mem = new_rd_Proj(dbg, block, irn, mode_M, pn_Alloc_M);
295 no_exc = new_rd_Proj(dbg, block, irn, mode_X, pn_Alloc_X_regular);
296 exc = new_rd_Proj(dbg, block, irn, mode_X, pn_Alloc_X_except);
297 irn = new_rd_Proj(dbg, block, irn, get_modeP_data(), pn_Alloc_res);
299 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
300 replace_call(irn, call, mem, no_exc, exc);
302 } /* i_mapper_alloca */
304 /* A mapper for the floating point sqrt. */
305 int i_mapper_sqrt(ir_node *call, void *ctx) {
308 ir_node *op = get_Call_param(call, 0);
314 tv = get_Const_tarval(op);
315 if (! tarval_is_null(tv) && !tarval_is_one(tv))
318 mem = get_Call_mem(call);
320 /* sqrt(0) = 0, sqrt(1) = 1 */
321 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
322 replace_call(op, call, mem, NULL, NULL);
324 } /* i_mapper_sqrt */
326 /* A mapper for the floating point cbrt. */
327 int i_mapper_cbrt(ir_node *call, void *ctx) {
330 ir_node *op = get_Call_param(call, 0);
336 tv = get_Const_tarval(op);
337 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
340 mem = get_Call_mem(call);
342 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
343 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
344 replace_call(op, call, mem, NULL, NULL);
346 } /* i_mapper_cbrt */
348 /* A mapper for the floating point pow. */
349 int i_mapper_pow(ir_node *call, void *ctx) {
352 ir_node *left = get_Call_param(call, 0);
353 ir_node *right = get_Call_param(call, 1);
354 ir_node *block = get_nodes_block(call);
355 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
358 if (is_Const(left) && is_Const_one(left)) {
359 /* pow (1.0, x) = 1.0 */
361 } else if (is_Const(right)) {
362 tarval *tv = get_Const_tarval(right);
363 if (tarval_is_null(tv)) {
364 /* pow(x, 0.0) = 1.0 */
365 ir_mode *mode = get_tarval_mode(tv);
366 irn = new_Const(get_mode_one(mode));
367 } else if (tarval_is_one(tv)) {
368 /* pow(x, 1.0) = x */
370 } else if (tarval_is_minus_one(tv)) {
371 /* pow(x, -1.0) = 1/x */
379 mem = get_Call_mem(call);
380 dbg = get_irn_dbg_info(call);
383 ir_mode *mode = get_irn_mode(left);
386 irn = new_Const(get_mode_one(mode));
387 quot = new_rd_Quot(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
388 mem = new_r_Proj(block, quot, mode_M, pn_Quot_M);
389 irn = new_r_Proj(block, quot, mode, pn_Quot_res);
390 reg_jmp = new_r_Proj(block, quot, mode_X, pn_Quot_X_regular);
391 exc_jmp = new_r_Proj(block, quot, mode_X, pn_Quot_X_except);
393 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
394 replace_call(irn, call, mem, reg_jmp, exc_jmp);
398 /* A mapper for the floating point exp. */
399 int i_mapper_exp(ir_node *call, void *ctx) {
400 ir_node *val = get_Call_param(call, 0);
403 if (is_Const(val) && is_Const_null(val)) {
405 ir_mode *mode = get_irn_mode(val);
406 ir_node *irn = new_Const(get_mode_one(mode));
407 ir_node *mem = get_Call_mem(call);
408 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
409 replace_call(irn, call, mem, NULL, NULL);
416 * A mapper for mapping f(0.0) to 0.0.
418 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason) {
419 ir_node *val = get_Call_param(call, 0);
422 if (is_Const(val) && is_Const_null(val)) {
424 ir_node *mem = get_Call_mem(call);
425 DBG_OPT_ALGSIM0(call, val, reason);
426 replace_call(val, call, mem, NULL, NULL);
430 } /* i_mapper_zero_to_zero */
433 * A mapper for mapping f(1.0) to 0.0.
435 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason) {
436 ir_node *val = get_Call_param(call, 0);
439 if (is_Const(val) && is_Const_one(val)) {
440 /* acos(1.0) = 0.0 */
441 ir_mode *mode = get_irn_mode(val);
442 ir_node *irn = new_Const(get_mode_null(mode));
443 ir_node *mem = get_Call_mem(call);
444 DBG_OPT_ALGSIM0(call, irn, reason);
445 replace_call(irn, call, mem, NULL, NULL);
449 } /* i_mapper_one_to_zero */
452 * A mapper for mapping a functions with the following characteristics:
456 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason) {
457 ir_node *val = get_Call_param(call, 0);
460 if (is_strictConv(val)) {
461 ir_node *op = get_Conv_op(val);
463 /* f(-x) = f(x) with strictConv */
464 ir_node *block = get_nodes_block(call);
465 ir_mode *mode = get_irn_mode(val);
466 dbg_info *dbg = get_irn_dbg_info(val);
468 op = get_Minus_op(op);
469 val = new_rd_Conv(dbg, block, op, mode);
472 set_Conv_strict(val, 1);
474 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
475 set_Call_param(call, 0, val);
477 } else if (is_Minus(val)) {
479 val = get_Minus_op(val);
480 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
481 set_Call_param(call, 0, val);
484 if (is_Const(val) && is_Const_null(val)) {
486 ir_mode *mode = get_irn_mode(val);
487 ir_node *irn = new_Const(get_mode_one(mode));
488 ir_node *mem = get_Call_mem(call);
489 DBG_OPT_ALGSIM0(call, irn, reason);
490 replace_call(irn, call, mem, NULL, NULL);
494 } /* i_mapper_symmetric_zero_to_one */
496 /* A mapper for the floating point log. */
497 int i_mapper_log(ir_node *call, void *ctx) {
499 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
502 /* A mapper for the floating point sin. */
503 int i_mapper_sin(ir_node *call, void *ctx) {
505 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
508 /* A mapper for the floating point cos. */
509 int i_mapper_cos(ir_node *call, void *ctx) {
510 /* cos(0.0) = 1.0, cos(-x) = x */
511 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
514 /* A mapper for the floating point tan. */
515 int i_mapper_tan(ir_node *call, void *ctx) {
517 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
520 /* A mapper for the floating point asin. */
521 int i_mapper_asin(ir_node *call, void *ctx) {
522 /* asin(0.0) = 0.0 */
523 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
524 } /* i_mapper_asin */
526 /* A mapper for the floating point acos. */
527 int i_mapper_acos(ir_node *call, void *ctx) {
528 /* acos(1.0) = 0.0 */
529 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
530 } /* i_mapper_acos */
532 /* A mapper for the floating point atan. */
533 int i_mapper_atan(ir_node *call, void *ctx) {
534 /* atan(0.0) = 0.0 */
535 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
536 } /* i_mapper_atan */
538 /* A mapper for the floating point sinh. */
539 int i_mapper_sinh(ir_node *call, void *ctx) {
540 /* sinh(0.0) = 0.0 */
541 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
542 } /* i_mapper_sinh */
544 /* A mapper for the floating point cosh. */
545 int i_mapper_cosh(ir_node *call, void *ctx) {
546 /* cosh(0.0) = 1.0, cosh(-x) = x */
547 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
548 } /* i_mapper_cosh */
550 /* A mapper for the floating point tanh. */
551 int i_mapper_tanh(ir_node *call, void *ctx) {
552 /* tanh(0.0) = 0.0 */
553 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
554 } /* i_mapper_tanh */
557 * Return the const entity that is accessed through the pointer ptr or
558 * NULL if there is no entity (or the entity is not constant).
560 * @param ptr the pointer
562 static ir_entity *get_const_entity(ir_node *ptr) {
563 /* FIXME: this cannot handle constant strings inside struct initializers yet */
564 if (is_Global(ptr)) {
565 ir_entity *ent = get_Global_entity(ptr);
567 if (get_entity_variability(ent) == variability_constant) {
568 /* a constant entity */
573 } /* get_const_entity */
576 * Calculate the value of strlen if possible.
578 * @param ent the entity
579 * @param res_tp the result type
581 * @return a Const node containing the strlen() result or NULL
582 * if the evaluation fails
584 static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp) {
585 ir_type *tp = get_entity_type(ent);
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) != 8)
600 n = get_compound_ent_n_values(ent);
601 for (i = 0; i < n; ++i) {
602 ir_node *irn = get_compound_ent_value(ent, i);
607 if (is_Const_null(irn)) {
608 /* found the length */
614 tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
615 return new_Const_type(tv, res_tp);
620 /* A mapper for strlen */
621 int i_mapper_strlen(ir_node *call, void *ctx) {
622 ir_node *s = get_Call_param(call, 0);
623 ir_entity *ent = get_const_entity(s);
627 /* FIXME: this cannot handle constant strings inside struct initializers yet */
629 /* a constant entity */
630 ir_type *tp = get_Call_type(call);
633 tp = get_method_res_type(tp, 0);
634 irn = eval_strlen(ent, tp);
637 ir_node *mem = get_Call_mem(call);
638 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
639 replace_call(irn, call, mem, NULL, NULL);
644 } /* i_mapper_strlen */
647 * Calculate the value of strlen if possible.
649 * @param left the left entity
650 * @param right the right entity
651 * @param res_tp the result type
653 * @return a Const node containing the strcmp() result or NULL
654 * if the evaluation fails
656 static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp) {
661 tp = get_entity_type(left);
662 if (! is_Array_type(tp))
664 tp = get_array_element_type(tp);
665 if (! is_Primitive_type(tp))
667 mode = get_type_mode(tp);
669 /* FIXME: This is too restrict, as the type char might be more the 8bits */
670 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
673 tp = get_entity_type(right);
674 if (! is_Array_type(tp))
676 tp = get_array_element_type(tp);
677 if (! is_Primitive_type(tp))
679 mode = get_type_mode(tp);
681 /* FIXME: This is too restrict, as the type char might be more the 8bits */
682 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
685 n = get_compound_ent_n_values(left);
686 n_r = get_compound_ent_n_values(right);
689 for (i = 0; i < n; ++i) {
694 irn = get_compound_ent_value(left, i);
697 tv = get_Const_tarval(irn);
698 v_l = get_tarval_long(tv);
700 irn = get_compound_ent_value(right, i);
703 tv = get_Const_tarval(irn);
704 v_r = get_tarval_long(tv);
721 /* we found an end */
722 tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
723 return new_Const_type(tv, res_tp);
729 * Checks if an entity represents the empty string.
731 * @param ent the entity
733 * @return non-zero if ent represents the empty string
735 static int is_empty_string(ir_entity *ent) {
736 ir_type *tp = get_entity_type(ent);
741 if (! is_Array_type(tp))
743 tp = get_array_element_type(tp);
744 if (! is_Primitive_type(tp))
746 mode = get_type_mode(tp);
748 /* FIXME: This is too restrict, as the type char might be more the 8bits */
749 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
752 n = get_compound_ent_n_values(ent);
755 irn = get_compound_ent_value(ent, 0);
757 return is_Const(irn) && is_Const_null(irn);
758 } /* is_empty_string */
760 /* A mapper for strcmp */
761 int i_mapper_strcmp(ir_node *call, void *ctx) {
762 ir_node *left = get_Call_param(call, 0);
763 ir_node *right = get_Call_param(call, 1);
767 ir_type *call_tp = get_Call_type(call);
768 ir_type *res_tp = get_method_res_type(call_tp, 0);
769 ir_entity *ent_l, *ent_r;
775 /* do some type checks first */
776 if (! is_Primitive_type(res_tp))
778 char_tp = get_method_param_type(call_tp, 0);
779 if (char_tp != get_method_param_type(call_tp, 1))
781 if (! is_Pointer_type(char_tp))
783 char_tp = get_pointer_points_to_type(char_tp);
786 /* a strcmp(s, s) ==> 0 */
787 ir_node *mem = get_Call_mem(call);
788 ir_mode *mode = get_type_mode(res_tp);
790 irn = new_Const(get_mode_null(mode));
791 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
792 replace_call(irn, call, mem, NULL, NULL);
795 ent_l = get_const_entity(left);
796 ent_r = get_const_entity(right);
798 if (ent_l != NULL && ent_r != NULL) {
799 /* both entities are const, try to evaluate */
800 irn = eval_strcmp(ent_l, ent_r, res_tp);
801 } else if (ent_l != NULL) {
802 if (is_empty_string(ent_l)) {
803 /* s strcmp("", s) ==> -(*s)*/
805 goto replace_by_call;
807 } else if (ent_r != NULL) {
808 if (is_empty_string(ent_r)) {
809 /* s strcmp(s, "") ==> (*s) */
810 ir_node *mem, *block;
816 mem = get_Call_mem(call);
817 block = get_nodes_block(call);
818 dbg = get_irn_dbg_info(call);
819 mode = get_type_mode(char_tp);
821 /* replace the strcmp by (*x) */
822 irn = new_rd_Load(dbg, block, mem, v, mode, 0);
823 mem = new_r_Proj(block, irn, mode_M, pn_Load_M);
824 exc = new_r_Proj(block, irn, mode_X, pn_Load_X_except);
825 reg = new_r_Proj(block, irn, mode_X, pn_Load_X_regular);
826 irn = new_r_Proj(block, irn, mode, pn_Load_res);
828 /* conv to the result mode */
829 mode = get_type_mode(res_tp);
830 irn = new_rd_Conv(dbg, block, irn, mode);
833 /* negate in the ("", s) case */
834 irn = new_rd_Minus(dbg, block, irn, mode);
840 ir_node *mem = get_Call_mem(call);
841 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
842 replace_call(irn, call, mem, reg, exc);
847 } /* i_mapper_strcmp */
849 /* A mapper for strncmp */
850 int i_mapper_strncmp(ir_node *call, void *ctx) {
851 ir_node *left = get_Call_param(call, 0);
852 ir_node *right = get_Call_param(call, 1);
853 ir_node *len = get_Call_param(call, 2);
857 if (left == right || (is_Const(len) && is_Const_null(len))) {
858 /* a strncmp(s, s, len) ==> 0 OR
859 a strncmp(a, b, 0) ==> 0 */
860 ir_node *mem = get_Call_mem(call);
861 ir_node *adr = get_Call_ptr(call);
862 ir_entity *ent = get_SymConst_entity(adr);
863 ir_type *call_tp = get_entity_type(ent);
864 ir_type *res_tp = get_method_res_type(call_tp, 0);
865 ir_mode *mode = get_type_mode(res_tp);
867 irn = new_Const(get_mode_null(mode));
868 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
869 replace_call(irn, call, mem, NULL, NULL);
873 } /* i_mapper_strncmp */
875 /* A mapper for strcpy */
876 int i_mapper_strcpy(ir_node *call, void *ctx) {
877 ir_node *dst = get_Call_param(call, 0);
878 ir_node *src = get_Call_param(call, 1);
882 /* a strcpy(d, s) ==> d */
883 ir_node *mem = get_Call_mem(call);
884 ir_node *dst = get_Call_param(call, 0);
886 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
887 replace_call(dst, call, mem, NULL, NULL);
891 } /* i_mapper_strcpy */
893 /* A mapper for memcpy */
894 int i_mapper_memcpy(ir_node *call, void *ctx) {
895 ir_node *dst = get_Call_param(call, 0);
896 ir_node *src = get_Call_param(call, 1);
897 ir_node *len = get_Call_param(call, 2);
900 if (dst == src || (is_Const(len) && is_Const_null(len))) {
901 /* a memcpy(d, d, len) ==> d OR
902 a memcpy(d, s, 0) ==> d */
903 ir_node *mem = get_Call_mem(call);
905 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
906 replace_call(dst, call, mem, NULL, NULL);
910 } /* i_mapper_memcpy */
912 /* A mapper for mempcpy */
913 int i_mapper_mempcpy(ir_node *call, void *ctx) {
914 ir_node *dst = get_Call_param(call, 0);
915 ir_node *src = get_Call_param(call, 1);
916 ir_node *len = get_Call_param(call, 2);
919 if (dst == src || (is_Const(len) && is_Const_null(len))) {
920 /* a memcpy(d, d, len) ==> d + len OR
921 a memcpy(d, s, 0) ==> d + 0 */
922 dbg_info *dbg = get_irn_dbg_info(call);
923 ir_node *mem = get_Call_mem(call);
924 ir_node *blk = get_nodes_block(call);
925 ir_mode *mode = get_irn_mode(dst);
926 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
928 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
929 replace_call(res, call, mem, NULL, NULL);
933 } /* i_mapper_mempcpy */
935 /* A mapper for memmove */
936 int i_mapper_memmove(ir_node *call, void *ctx) {
937 ir_node *dst = get_Call_param(call, 0);
938 ir_node *src = get_Call_param(call, 1);
939 ir_node *len = get_Call_param(call, 2);
942 if (dst == src || (is_Const(len) && is_Const_null(len))) {
943 /* a memmove(d, d, len) ==> d OR
944 a memmove(d, s, 0) ==> d */
945 ir_node *mem = get_Call_mem(call);
947 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
948 replace_call(dst, call, mem, NULL, NULL);
952 } /* i_mapper_memmove */
954 /* A mapper for memset */
955 int i_mapper_memset(ir_node *call, void *ctx) {
956 ir_node *len = get_Call_param(call, 2);
959 if (is_Const(len) && is_Const_null(len)) {
960 /* a memset(d, C, 0) ==> d */
961 ir_node *mem = get_Call_mem(call);
962 ir_node *dst = get_Call_param(call, 0);
964 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
965 replace_call(dst, call, mem, NULL, NULL);
969 } /* i_mapper_memset */
971 /* A mapper for memcmp */
972 int i_mapper_memcmp(ir_node *call, void *ctx) {
973 ir_node *left = get_Call_param(call, 0);
974 ir_node *right = get_Call_param(call, 1);
975 ir_node *len = get_Call_param(call, 2);
979 if (left == right || (is_Const(len) && is_Const_null(len))) {
980 /* a memcmp(s, s, len) ==> 0 OR
981 a memcmp(a, b, 0) ==> 0 */
982 ir_node *mem = get_Call_mem(call);
983 ir_node *adr = get_Call_ptr(call);
984 ir_entity *ent = get_SymConst_entity(adr);
985 ir_type *call_tp = get_entity_type(ent);
986 ir_type *res_tp = get_method_res_type(call_tp, 0);
987 ir_mode *mode = get_type_mode(res_tp);
989 irn = new_Const(get_mode_null(mode));
990 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
991 replace_call(irn, call, mem, NULL, NULL);
995 } /* i_mapper_memcmp */
998 * Returns the result mode of a node.
1000 static ir_mode *get_irn_res_mode(ir_node *node) {
1001 switch (get_irn_opcode(node)) {
1002 case iro_Load: return get_Load_mode(node);
1003 case iro_Quot: return get_Quot_resmode(node);
1004 case iro_Div: return get_Div_resmode(node);
1005 case iro_Mod: return get_Mod_resmode(node);
1006 case iro_DivMod: return get_DivMod_resmode(node);
1007 default: return NULL;
1009 } /* get_irn_res_mode */
1011 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
1013 /* A mapper for mapping unsupported instructions to runtime calls. */
1014 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) {
1015 int i, j, arity, first, n_param, n_res;
1018 ir_node *mem, *bl, *call, *addr, *res_proj;
1021 symconst_symbol sym;
1022 ir_mode *mode = get_irn_mode(node);
1024 if (mode != rt->mode)
1026 /* check if the result modes match */
1027 if (mode == mode_T && rt->res_mode != NULL) {
1028 mode = get_irn_res_mode(node);
1029 if (mode != rt->res_mode)
1033 arity = get_irn_arity(node);
1037 mtp = get_entity_type(rt->ent);
1038 n_param = get_method_n_params(mtp);
1039 irg = current_ir_graph;
1041 mem = get_irn_n(node, 0);
1042 if (get_irn_mode(mem) != mode_M) {
1043 mem = new_r_NoMem(irg);
1048 /* check if the modes of the predecessors match the parameter modes */
1049 if (arity - first != n_param)
1052 for (i = first, j = 0; i < arity; ++i, ++j) {
1053 ir_type *param_tp = get_method_param_type(mtp, j);
1054 ir_node *pred = get_irn_n(node, i);
1056 if (get_type_mode(param_tp) != get_irn_mode(pred))
1060 n_res = get_method_n_ress(mtp);
1062 /* step 0: calculate the number of needed Proj's */
1064 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
1065 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1066 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1067 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
1068 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
1071 if (rt->mode != mode_T) /* must be mode_T */
1076 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1080 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1081 bl = get_nodes_block(node);
1085 NEW_ARR_A(ir_node *, in, n_param);
1086 for (i = 0; i < n_param; ++i)
1087 in[i] = get_irn_n(node, first + i);
1090 /* step 1: create the call */
1091 sym.entity_p = rt->ent;
1092 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1093 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1094 set_irn_pinned(call, get_irn_pinned(node));
1097 res_proj = new_r_Proj(bl, call, mode_T, pn_Call_T_result);
1102 n_proj += n_res - 1;
1105 turn_into_tuple(node, n_proj);
1107 for (i = 0; i < n_proj; ++i)
1108 set_Tuple_pred(node, i, new_r_Bad(irg));
1109 if (rt->mem_proj_nr >= 0)
1110 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(bl, call, mode_M, pn_Call_M_regular));
1111 if (!is_NoMem(mem)) {
1112 /* Exceptions can only be handled with real memory */
1113 if (rt->regular_proj_nr >= 0)
1114 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(bl, call, mode_X, pn_Call_X_regular));
1115 if (rt->exc_proj_nr >= 0)
1116 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(bl, call, mode_X, pn_Call_X_except));
1117 if (rt->exc_mem_proj_nr >= 0)
1118 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(bl, call, mode_M, pn_Call_M_except));
1121 if (rt->res_proj_nr >= 0)
1122 for (i = 0; i < n_res; ++i)
1123 set_Tuple_pred(node, rt->res_proj_nr + i,
1124 new_r_Proj(bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
1127 /* only one return value supported */
1129 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1131 res_proj = new_r_Proj(bl, call, mode_T, pn_Call_T_result);
1132 res_proj = new_r_Proj(bl, res_proj, mode, 0);
1134 exchange(node, res_proj);
1138 /* should not happen */
1140 } /* i_mapper_RuntimeCall */