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 (void) irp; /* TODO: set current irp, or remove parameter */
177 lower_intrinsics(pass->list, pass->length, pass->part_block_used);
178 /* probably this pass should not run again */
183 * Creates an ir_prog pass for lower_intrinsics.
185 * @param name the name of this pass or NULL
186 * @param list an array of intrinsic map records
187 * @param length the length of the array
188 * @param part_block_used set to true if part_block() must be using during lowering
190 ir_prog_pass_t *lower_intrinsics_pass(
192 i_record *list, int length, int part_block_used)
194 struct pass_t *pass = xmalloc(sizeof(*pass) + (length-1) * sizeof(pass->list[0]));
196 memcpy(pass->list, list, sizeof(list[0]) * length);
197 pass->length = length;
198 pass->part_block_used = part_block_used;
200 return def_prog_pass_constructor(
201 &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
202 } /* lower_intrinsics_pass*/
205 * Helper function, replace the call by the given node.
207 * @param irn the result node
208 * @param call the call to replace
209 * @param mem the new mem result
210 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
211 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
213 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp) {
214 ir_node *block = get_nodes_block(call);
216 if (reg_jmp == NULL) {
218 /* Beware: do we need here a protection against CSE? Better we do it. */
219 int old_cse = get_opt_cse();
221 reg_jmp = new_r_Jmp(block);
222 set_opt_cse(old_cse);
225 irn = new_r_Tuple(block, 1, &irn);
227 turn_into_tuple(call, pn_Call_max);
228 set_Tuple_pred(call, pn_Call_M, mem);
229 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
230 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
231 set_Tuple_pred(call, pn_Call_T_result, irn);
232 set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
235 /* A mapper for the integer abs. */
236 int i_mapper_abs(ir_node *call, void *ctx) {
237 ir_node *mem = get_Call_mem(call);
238 ir_node *block = get_nodes_block(call);
239 ir_node *op = get_Call_param(call, 0);
241 dbg_info *dbg = get_irn_dbg_info(call);
244 irn = new_rd_Abs(dbg, block, op, get_irn_mode(op));
245 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
246 replace_call(irn, call, mem, NULL, NULL);
250 /* A mapper for the integer bswap. */
251 int i_mapper_bswap(ir_node *call, void *ctx) {
252 ir_node *mem = get_Call_mem(call);
253 ir_node *block = get_nodes_block(call);
254 ir_node *op = get_Call_param(call, 0);
255 ir_type *tp = get_Call_type(call);
256 dbg_info *dbg = get_irn_dbg_info(call);
260 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
261 set_irn_pinned(irn, op_pin_state_floats);
262 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
263 irn = new_r_Proj(block, irn, get_irn_mode(op), pn_Builtin_1_result);
264 replace_call(irn, call, mem, NULL, NULL);
266 } /* i_mapper_bswap */
268 /* A mapper for the alloca() function. */
269 int i_mapper_alloca(ir_node *call, void *ctx) {
270 ir_node *mem = get_Call_mem(call);
271 ir_node *block = get_nodes_block(call);
272 ir_node *op = get_Call_param(call, 0);
273 ir_node *irn, *exc, *no_exc;
274 dbg_info *dbg = get_irn_dbg_info(call);
277 if (mode_is_signed(get_irn_mode(op))) {
278 ir_mode *mode = get_irn_mode(op);
279 mode = find_unsigned_mode(mode);
281 panic("Cannot find unsigned mode for %M", mode);
283 op = new_rd_Conv(dbg, block, op, mode);
286 irn = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
287 mem = new_rd_Proj(dbg, block, irn, mode_M, pn_Alloc_M);
288 no_exc = new_rd_Proj(dbg, block, irn, mode_X, pn_Alloc_X_regular);
289 exc = new_rd_Proj(dbg, block, irn, mode_X, pn_Alloc_X_except);
290 irn = new_rd_Proj(dbg, block, irn, get_modeP_data(), pn_Alloc_res);
292 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
293 replace_call(irn, call, mem, no_exc, exc);
295 } /* i_mapper_alloca */
297 /* A mapper for the floating point sqrt. */
298 int i_mapper_sqrt(ir_node *call, void *ctx) {
301 ir_node *op = get_Call_param(call, 0);
307 tv = get_Const_tarval(op);
308 if (! tarval_is_null(tv) && !tarval_is_one(tv))
311 mem = get_Call_mem(call);
313 /* sqrt(0) = 0, sqrt(1) = 1 */
314 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
315 replace_call(op, call, mem, NULL, NULL);
317 } /* i_mapper_sqrt */
319 /* A mapper for the floating point cbrt. */
320 int i_mapper_cbrt(ir_node *call, void *ctx) {
323 ir_node *op = get_Call_param(call, 0);
329 tv = get_Const_tarval(op);
330 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
333 mem = get_Call_mem(call);
335 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
336 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
337 replace_call(op, call, mem, NULL, NULL);
339 } /* i_mapper_cbrt */
341 /* A mapper for the floating point pow. */
342 int i_mapper_pow(ir_node *call, void *ctx) {
345 ir_node *left = get_Call_param(call, 0);
346 ir_node *right = get_Call_param(call, 1);
347 ir_node *block = get_nodes_block(call);
348 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
351 if (is_Const(left) && is_Const_one(left)) {
352 /* pow (1.0, x) = 1.0 */
354 } else if (is_Const(right)) {
355 tarval *tv = get_Const_tarval(right);
356 if (tarval_is_null(tv)) {
357 /* pow(x, 0.0) = 1.0 */
358 ir_mode *mode = get_tarval_mode(tv);
359 irn = new_Const(get_mode_one(mode));
360 } else if (tarval_is_one(tv)) {
361 /* pow(x, 1.0) = x */
363 } else if (tarval_is_minus_one(tv)) {
364 /* pow(x, -1.0) = 1/x */
372 mem = get_Call_mem(call);
373 dbg = get_irn_dbg_info(call);
376 ir_mode *mode = get_irn_mode(left);
379 irn = new_Const(get_mode_one(mode));
380 quot = new_rd_Quot(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
381 mem = new_r_Proj(block, quot, mode_M, pn_Quot_M);
382 irn = new_r_Proj(block, quot, mode, pn_Quot_res);
383 reg_jmp = new_r_Proj(block, quot, mode_X, pn_Quot_X_regular);
384 exc_jmp = new_r_Proj(block, quot, mode_X, pn_Quot_X_except);
386 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
387 replace_call(irn, call, mem, reg_jmp, exc_jmp);
391 /* A mapper for the floating point exp. */
392 int i_mapper_exp(ir_node *call, void *ctx) {
393 ir_node *val = get_Call_param(call, 0);
396 if (is_Const(val) && is_Const_null(val)) {
398 ir_mode *mode = get_irn_mode(val);
399 ir_node *irn = new_Const(get_mode_one(mode));
400 ir_node *mem = get_Call_mem(call);
401 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
402 replace_call(irn, call, mem, NULL, NULL);
409 * A mapper for mapping f(0.0) to 0.0.
411 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason) {
412 ir_node *val = get_Call_param(call, 0);
415 if (is_Const(val) && is_Const_null(val)) {
417 ir_node *mem = get_Call_mem(call);
418 DBG_OPT_ALGSIM0(call, val, reason);
419 replace_call(val, call, mem, NULL, NULL);
423 } /* i_mapper_zero_to_zero */
426 * A mapper for mapping f(1.0) to 0.0.
428 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason) {
429 ir_node *val = get_Call_param(call, 0);
432 if (is_Const(val) && is_Const_one(val)) {
433 /* acos(1.0) = 0.0 */
434 ir_mode *mode = get_irn_mode(val);
435 ir_node *irn = new_Const(get_mode_null(mode));
436 ir_node *mem = get_Call_mem(call);
437 DBG_OPT_ALGSIM0(call, irn, reason);
438 replace_call(irn, call, mem, NULL, NULL);
442 } /* i_mapper_one_to_zero */
445 * A mapper for mapping a functions with the following characteristics:
449 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason) {
450 ir_node *val = get_Call_param(call, 0);
453 if (is_strictConv(val)) {
454 ir_node *op = get_Conv_op(val);
456 /* f(-x) = f(x) with strictConv */
457 ir_node *block = get_nodes_block(call);
458 ir_mode *mode = get_irn_mode(val);
459 dbg_info *dbg = get_irn_dbg_info(val);
461 op = get_Minus_op(op);
462 val = new_rd_Conv(dbg, block, op, mode);
465 set_Conv_strict(val, 1);
467 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
468 set_Call_param(call, 0, val);
470 } else if (is_Minus(val)) {
472 val = get_Minus_op(val);
473 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
474 set_Call_param(call, 0, val);
477 if (is_Const(val) && is_Const_null(val)) {
479 ir_mode *mode = get_irn_mode(val);
480 ir_node *irn = new_Const(get_mode_one(mode));
481 ir_node *mem = get_Call_mem(call);
482 DBG_OPT_ALGSIM0(call, irn, reason);
483 replace_call(irn, call, mem, NULL, NULL);
487 } /* i_mapper_symmetric_zero_to_one */
489 /* A mapper for the floating point log. */
490 int i_mapper_log(ir_node *call, void *ctx) {
492 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
495 /* A mapper for the floating point sin. */
496 int i_mapper_sin(ir_node *call, void *ctx) {
498 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
501 /* A mapper for the floating point cos. */
502 int i_mapper_cos(ir_node *call, void *ctx) {
503 /* cos(0.0) = 1.0, cos(-x) = x */
504 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
507 /* A mapper for the floating point tan. */
508 int i_mapper_tan(ir_node *call, void *ctx) {
510 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
513 /* A mapper for the floating point asin. */
514 int i_mapper_asin(ir_node *call, void *ctx) {
515 /* asin(0.0) = 0.0 */
516 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
517 } /* i_mapper_asin */
519 /* A mapper for the floating point acos. */
520 int i_mapper_acos(ir_node *call, void *ctx) {
521 /* acos(1.0) = 0.0 */
522 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
523 } /* i_mapper_acos */
525 /* A mapper for the floating point atan. */
526 int i_mapper_atan(ir_node *call, void *ctx) {
527 /* atan(0.0) = 0.0 */
528 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
529 } /* i_mapper_atan */
531 /* A mapper for the floating point sinh. */
532 int i_mapper_sinh(ir_node *call, void *ctx) {
533 /* sinh(0.0) = 0.0 */
534 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
535 } /* i_mapper_sinh */
537 /* A mapper for the floating point cosh. */
538 int i_mapper_cosh(ir_node *call, void *ctx) {
539 /* cosh(0.0) = 1.0, cosh(-x) = x */
540 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
541 } /* i_mapper_cosh */
543 /* A mapper for the floating point tanh. */
544 int i_mapper_tanh(ir_node *call, void *ctx) {
545 /* tanh(0.0) = 0.0 */
546 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
547 } /* i_mapper_tanh */
550 * Return the const entity that is accessed through the pointer ptr or
551 * NULL if there is no entity (or the entity is not constant).
553 * @param ptr the pointer
555 static ir_entity *get_const_entity(ir_node *ptr) {
556 /* FIXME: this cannot handle constant strings inside struct initializers yet */
557 if (is_Global(ptr)) {
558 ir_entity *ent = get_Global_entity(ptr);
560 if (get_entity_variability(ent) == variability_constant) {
561 /* a constant entity */
566 } /* get_const_entity */
569 * Calculate the value of strlen if possible.
571 * @param ent the entity
572 * @param res_tp the result type
574 * @return a Const node containing the strlen() result or NULL
575 * if the evaluation fails
577 static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp) {
578 ir_type *tp = get_entity_type(ent);
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) != 8)
593 n = get_compound_ent_n_values(ent);
594 for (i = 0; i < n; ++i) {
595 ir_node *irn = get_compound_ent_value(ent, i);
600 if (is_Const_null(irn)) {
601 /* found the length */
607 tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
608 return new_Const_type(tv, res_tp);
613 /* A mapper for strlen */
614 int i_mapper_strlen(ir_node *call, void *ctx) {
615 ir_node *s = get_Call_param(call, 0);
616 ir_entity *ent = get_const_entity(s);
620 /* FIXME: this cannot handle constant strings inside struct initializers yet */
622 /* a constant entity */
623 ir_type *tp = get_Call_type(call);
626 tp = get_method_res_type(tp, 0);
627 irn = eval_strlen(ent, tp);
630 ir_node *mem = get_Call_mem(call);
631 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
632 replace_call(irn, call, mem, NULL, NULL);
637 } /* i_mapper_strlen */
640 * Calculate the value of strlen if possible.
642 * @param left the left entity
643 * @param right the right entity
644 * @param res_tp the result type
646 * @return a Const node containing the strcmp() result or NULL
647 * if the evaluation fails
649 static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp) {
654 tp = get_entity_type(left);
655 if (! is_Array_type(tp))
657 tp = get_array_element_type(tp);
658 if (! is_Primitive_type(tp))
660 mode = get_type_mode(tp);
662 /* FIXME: This is too restrict, as the type char might be more the 8bits */
663 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
666 tp = get_entity_type(right);
667 if (! is_Array_type(tp))
669 tp = get_array_element_type(tp);
670 if (! is_Primitive_type(tp))
672 mode = get_type_mode(tp);
674 /* FIXME: This is too restrict, as the type char might be more the 8bits */
675 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
678 n = get_compound_ent_n_values(left);
679 n_r = get_compound_ent_n_values(right);
682 for (i = 0; i < n; ++i) {
687 irn = get_compound_ent_value(left, i);
690 tv = get_Const_tarval(irn);
691 v_l = get_tarval_long(tv);
693 irn = get_compound_ent_value(right, i);
696 tv = get_Const_tarval(irn);
697 v_r = get_tarval_long(tv);
714 /* we found an end */
715 tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
716 return new_Const_type(tv, res_tp);
722 * Checks if an entity represents the empty string.
724 * @param ent the entity
726 * @return non-zero if ent represents the empty string
728 static int is_empty_string(ir_entity *ent) {
729 ir_type *tp = get_entity_type(ent);
732 ir_initializer_t *initializer;
733 ir_initializer_t *init0;
736 if (! is_Array_type(tp))
738 tp = get_array_element_type(tp);
739 if (! is_Primitive_type(tp))
741 mode = get_type_mode(tp);
743 /* FIXME: This is too restrict, as the type char might be more the 8bits */
744 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
747 if (!has_entity_initializer(ent)) {
748 /* code for deprecated compound_graph_path stuff */
749 int n = get_compound_ent_n_values(ent);
752 irn = get_compound_ent_value(ent, 0);
754 return is_Const(irn) && is_Const_null(irn);
757 initializer = get_entity_initializer(ent);
758 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
761 if (get_initializer_compound_n_entries(initializer) < 1)
764 init0 = get_initializer_compound_value(initializer, 0);
766 if (get_initializer_kind(init0) == IR_INITIALIZER_NULL) {
768 } else if (get_initializer_kind(init0) == IR_INITIALIZER_CONST) {
769 ir_node *irn = get_initializer_const_value(init0);
771 tv = get_Const_tarval(irn);
772 } else if (get_initializer_kind(init0) == IR_INITIALIZER_TARVAL) {
773 tv = get_initializer_tarval_value(init0);
776 return tv != NULL && tarval_is_null(tv);
777 } /* is_empty_string */
779 /* A mapper for strcmp */
780 int i_mapper_strcmp(ir_node *call, void *ctx) {
781 ir_node *left = get_Call_param(call, 0);
782 ir_node *right = get_Call_param(call, 1);
786 ir_type *call_tp = get_Call_type(call);
787 ir_type *res_tp = get_method_res_type(call_tp, 0);
788 ir_entity *ent_l, *ent_r;
794 /* do some type checks first */
795 if (! is_Primitive_type(res_tp))
797 char_tp = get_method_param_type(call_tp, 0);
798 if (char_tp != get_method_param_type(call_tp, 1))
800 if (! is_Pointer_type(char_tp))
802 char_tp = get_pointer_points_to_type(char_tp);
805 /* a strcmp(s, s) ==> 0 */
806 ir_node *mem = get_Call_mem(call);
807 ir_mode *mode = get_type_mode(res_tp);
809 irn = new_Const(get_mode_null(mode));
810 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
811 replace_call(irn, call, mem, NULL, NULL);
814 ent_l = get_const_entity(left);
815 ent_r = get_const_entity(right);
817 if (ent_l != NULL && ent_r != NULL) {
818 /* both entities are const, try to evaluate */
819 irn = eval_strcmp(ent_l, ent_r, res_tp);
820 } else if (ent_l != NULL) {
821 if (is_empty_string(ent_l)) {
822 /* s strcmp("", s) ==> -(*s)*/
824 goto replace_by_call;
826 } else if (ent_r != NULL) {
827 if (is_empty_string(ent_r)) {
828 /* s strcmp(s, "") ==> (*s) */
829 ir_node *mem, *block;
835 mem = get_Call_mem(call);
836 block = get_nodes_block(call);
837 dbg = get_irn_dbg_info(call);
838 mode = get_type_mode(char_tp);
840 /* replace the strcmp by (*x) */
841 irn = new_rd_Load(dbg, block, mem, v, mode, 0);
842 mem = new_r_Proj(block, irn, mode_M, pn_Load_M);
843 exc = new_r_Proj(block, irn, mode_X, pn_Load_X_except);
844 reg = new_r_Proj(block, irn, mode_X, pn_Load_X_regular);
845 irn = new_r_Proj(block, irn, mode, pn_Load_res);
847 /* conv to the result mode */
848 mode = get_type_mode(res_tp);
849 irn = new_rd_Conv(dbg, block, irn, mode);
852 /* negate in the ("", s) case */
853 irn = new_rd_Minus(dbg, block, irn, mode);
859 ir_node *mem = get_Call_mem(call);
860 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
861 replace_call(irn, call, mem, reg, exc);
866 } /* i_mapper_strcmp */
868 /* A mapper for strncmp */
869 int i_mapper_strncmp(ir_node *call, void *ctx) {
870 ir_node *left = get_Call_param(call, 0);
871 ir_node *right = get_Call_param(call, 1);
872 ir_node *len = get_Call_param(call, 2);
876 if (left == right || (is_Const(len) && is_Const_null(len))) {
877 /* a strncmp(s, s, len) ==> 0 OR
878 a strncmp(a, b, 0) ==> 0 */
879 ir_node *mem = get_Call_mem(call);
880 ir_node *adr = get_Call_ptr(call);
881 ir_entity *ent = get_SymConst_entity(adr);
882 ir_type *call_tp = get_entity_type(ent);
883 ir_type *res_tp = get_method_res_type(call_tp, 0);
884 ir_mode *mode = get_type_mode(res_tp);
886 irn = new_Const(get_mode_null(mode));
887 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
888 replace_call(irn, call, mem, NULL, NULL);
892 } /* i_mapper_strncmp */
894 /* A mapper for strcpy */
895 int i_mapper_strcpy(ir_node *call, void *ctx) {
896 ir_node *dst = get_Call_param(call, 0);
897 ir_node *src = get_Call_param(call, 1);
901 /* a strcpy(d, s) ==> d */
902 ir_node *mem = get_Call_mem(call);
903 ir_node *dst = get_Call_param(call, 0);
905 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
906 replace_call(dst, call, mem, NULL, NULL);
910 } /* i_mapper_strcpy */
912 /* A mapper for memcpy */
913 int i_mapper_memcpy(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 OR
921 a memcpy(d, s, 0) ==> d */
922 ir_node *mem = get_Call_mem(call);
924 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
925 replace_call(dst, call, mem, NULL, NULL);
929 } /* i_mapper_memcpy */
931 /* A mapper for mempcpy */
932 int i_mapper_mempcpy(ir_node *call, void *ctx) {
933 ir_node *dst = get_Call_param(call, 0);
934 ir_node *src = get_Call_param(call, 1);
935 ir_node *len = get_Call_param(call, 2);
938 if (dst == src || (is_Const(len) && is_Const_null(len))) {
939 /* a memcpy(d, d, len) ==> d + len OR
940 a memcpy(d, s, 0) ==> d + 0 */
941 dbg_info *dbg = get_irn_dbg_info(call);
942 ir_node *mem = get_Call_mem(call);
943 ir_node *blk = get_nodes_block(call);
944 ir_mode *mode = get_irn_mode(dst);
945 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
947 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
948 replace_call(res, call, mem, NULL, NULL);
952 } /* i_mapper_mempcpy */
954 /* A mapper for memmove */
955 int i_mapper_memmove(ir_node *call, void *ctx) {
956 ir_node *dst = get_Call_param(call, 0);
957 ir_node *src = get_Call_param(call, 1);
958 ir_node *len = get_Call_param(call, 2);
961 if (dst == src || (is_Const(len) && is_Const_null(len))) {
962 /* a memmove(d, d, len) ==> d OR
963 a memmove(d, s, 0) ==> d */
964 ir_node *mem = get_Call_mem(call);
966 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
967 replace_call(dst, call, mem, NULL, NULL);
971 } /* i_mapper_memmove */
973 /* A mapper for memset */
974 int i_mapper_memset(ir_node *call, void *ctx) {
975 ir_node *len = get_Call_param(call, 2);
978 if (is_Const(len) && is_Const_null(len)) {
979 /* a memset(d, C, 0) ==> d */
980 ir_node *mem = get_Call_mem(call);
981 ir_node *dst = get_Call_param(call, 0);
983 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
984 replace_call(dst, call, mem, NULL, NULL);
988 } /* i_mapper_memset */
990 /* A mapper for memcmp */
991 int i_mapper_memcmp(ir_node *call, void *ctx) {
992 ir_node *left = get_Call_param(call, 0);
993 ir_node *right = get_Call_param(call, 1);
994 ir_node *len = get_Call_param(call, 2);
998 if (left == right || (is_Const(len) && is_Const_null(len))) {
999 /* a memcmp(s, s, len) ==> 0 OR
1000 a memcmp(a, b, 0) ==> 0 */
1001 ir_node *mem = get_Call_mem(call);
1002 ir_node *adr = get_Call_ptr(call);
1003 ir_entity *ent = get_SymConst_entity(adr);
1004 ir_type *call_tp = get_entity_type(ent);
1005 ir_type *res_tp = get_method_res_type(call_tp, 0);
1006 ir_mode *mode = get_type_mode(res_tp);
1008 irn = new_Const(get_mode_null(mode));
1009 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1010 replace_call(irn, call, mem, NULL, NULL);
1014 } /* i_mapper_memcmp */
1017 * Returns the result mode of a node.
1019 static ir_mode *get_irn_res_mode(ir_node *node) {
1020 switch (get_irn_opcode(node)) {
1021 case iro_Load: return get_Load_mode(node);
1022 case iro_Quot: return get_Quot_resmode(node);
1023 case iro_Div: return get_Div_resmode(node);
1024 case iro_Mod: return get_Mod_resmode(node);
1025 case iro_DivMod: return get_DivMod_resmode(node);
1026 default: return NULL;
1028 } /* get_irn_res_mode */
1030 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
1032 /* A mapper for mapping unsupported instructions to runtime calls. */
1033 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt) {
1034 int i, j, arity, first, n_param, n_res;
1037 ir_node *mem, *bl, *call, *addr, *res_proj;
1040 symconst_symbol sym;
1041 ir_mode *mode = get_irn_mode(node);
1043 if (mode != rt->mode)
1045 /* check if the result modes match */
1046 if (mode == mode_T && rt->res_mode != NULL) {
1047 mode = get_irn_res_mode(node);
1048 if (mode != rt->res_mode)
1052 arity = get_irn_arity(node);
1056 mtp = get_entity_type(rt->ent);
1057 n_param = get_method_n_params(mtp);
1058 irg = current_ir_graph;
1060 mem = get_irn_n(node, 0);
1061 if (get_irn_mode(mem) != mode_M) {
1062 mem = new_r_NoMem(irg);
1067 /* check if the modes of the predecessors match the parameter modes */
1068 if (arity - first != n_param)
1071 for (i = first, j = 0; i < arity; ++i, ++j) {
1072 ir_type *param_tp = get_method_param_type(mtp, j);
1073 ir_node *pred = get_irn_n(node, i);
1075 if (get_type_mode(param_tp) != get_irn_mode(pred))
1079 n_res = get_method_n_ress(mtp);
1081 /* step 0: calculate the number of needed Proj's */
1083 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
1084 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1085 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1086 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
1087 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
1090 if (rt->mode != mode_T) /* must be mode_T */
1095 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1099 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1100 bl = get_nodes_block(node);
1104 NEW_ARR_A(ir_node *, in, n_param);
1105 for (i = 0; i < n_param; ++i)
1106 in[i] = get_irn_n(node, first + i);
1109 /* step 1: create the call */
1110 sym.entity_p = rt->ent;
1111 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1112 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1113 set_irn_pinned(call, get_irn_pinned(node));
1116 res_proj = new_r_Proj(bl, call, mode_T, pn_Call_T_result);
1121 n_proj += n_res - 1;
1124 turn_into_tuple(node, n_proj);
1126 for (i = 0; i < n_proj; ++i)
1127 set_Tuple_pred(node, i, new_r_Bad(irg));
1128 if (rt->mem_proj_nr >= 0)
1129 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(bl, call, mode_M, pn_Call_M));
1130 if (!is_NoMem(mem)) {
1131 /* Exceptions can only be handled with real memory */
1132 if (rt->regular_proj_nr >= 0)
1133 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(bl, call, mode_X, pn_Call_X_regular));
1134 if (rt->exc_proj_nr >= 0)
1135 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(bl, call, mode_X, pn_Call_X_except));
1136 if (rt->exc_mem_proj_nr >= 0)
1137 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(bl, call, mode_M, pn_Call_M));
1140 if (rt->res_proj_nr >= 0)
1141 for (i = 0; i < n_res; ++i)
1142 set_Tuple_pred(node, rt->res_proj_nr + i,
1143 new_r_Proj(bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
1146 /* only one return value supported */
1148 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1150 res_proj = new_r_Proj(bl, call, mode_T, pn_Call_T_result);
1151 res_proj = new_r_Proj(bl, res_proj, mode, 0);
1153 exchange(node, res_proj);
1157 /* should not happen */
1159 } /* i_mapper_RuntimeCall */