2 * Copyright (C) 1995-2008 University of Karlsruhe. All right reserved.
4 * This file is part of libFirm.
6 * This file may be distributed and/or modified under the terms of the
7 * GNU General Public License version 2 as published by the Free Software
8 * Foundation and appearing in the file LICENSE.GPL included in the
9 * packaging of this file.
11 * Licensees holding valid libFirm Professional Edition licenses may use
12 * this file in accordance with the libFirm Commercial License.
13 * Agreement provided with the Software.
15 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
16 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * @brief lowering of Calls of intrinsic functions
23 * @author Michael Beck
44 #include "iropt_dbg.h"
47 /** Walker environment. */
48 typedef struct _walker_env {
49 pmap *c_map; /**< The intrinsic call map. */
50 unsigned nr_of_intrinsics; /**< statistics */
51 i_instr_record **i_map; /**< The intrinsic instruction map. */
55 * walker: call all mapper functions
57 static void call_mapper(ir_node *node, void *env)
59 walker_env_t *wenv = env;
60 ir_op *op = get_irn_op(node);
65 const i_call_record *r;
68 symconst = get_Call_ptr(node);
69 if (! is_Global(symconst))
72 ent = get_Global_entity(symconst);
73 p = pmap_find(wenv->c_map, ent);
77 wenv->nr_of_intrinsics += r->i_mapper(node, r->ctx) ? 1 : 0;
80 if (op->code < (unsigned) ARR_LEN(wenv->i_map)) {
81 const i_instr_record *r = wenv->i_map[op->code];
82 /* run all possible mapper */
84 if (r->i_mapper(node, r->ctx)) {
85 ++wenv->nr_of_intrinsics;
94 /* Go through all graphs and map calls to intrinsic functions. */
95 unsigned lower_intrinsics(i_record *list, int length, int part_block_used)
97 int i, n_ops = get_irp_n_opcodes();
99 pmap *c_map = pmap_create_ex(length);
100 i_instr_record **i_map;
101 unsigned nr_of_intrinsics = 0;
104 /* we use the ir_op generic pointers here */
105 NEW_ARR_A(const i_instr_record *, i_map, n_ops);
106 memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
108 /* fill a map for faster search */
109 for (i = length - 1; i >= 0; --i) {
110 if (list[i].i_call.kind == INTRINSIC_CALL) {
111 pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
113 ir_op *op = list[i].i_instr.op;
114 assert(op->code < (unsigned) ARR_LEN(i_map));
116 list[i].i_instr.link = i_map[op->code];
117 i_map[op->code] = &list[i].i_instr;
124 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
125 irg = get_irp_irg(i);
127 if (part_block_used) {
128 ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
129 collect_phiprojs(irg);
132 wenv.nr_of_intrinsics = 0;
133 irg_walk_graph(irg, NULL, call_mapper, &wenv);
136 ir_free_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
138 if (wenv.nr_of_intrinsics > 0) {
139 /* Changes detected: we might have added/removed nodes. */
140 set_irg_outs_inconsistent(irg);
141 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
143 /* Exception control flow might have changed / new block might have added. */
144 set_irg_doms_inconsistent(irg);
145 set_irg_extblk_inconsistent(irg);
146 set_irg_loopinfo_inconsistent(irg);
148 /* Calls might be removed/added. */
149 set_trouts_inconsistent();
152 irg_verify(irg, VRFY_NORMAL);
154 /* Optimize it, tuple might be created. */
155 optimize_graph_df(irg);
157 nr_of_intrinsics += wenv.nr_of_intrinsics;
162 return nr_of_intrinsics;
163 } /* lower_intrinsics */
174 * Wrapper for running lower_intrinsics() as an ir_prog pass.
176 static int pass_wrapper(ir_prog *irp, void *context)
178 struct pass_t *pass = context;
179 (void) irp; /* TODO: set current irp, or remove parameter */
180 lower_intrinsics(pass->list, pass->length, pass->part_block_used);
181 /* probably this pass should not run again */
186 * Creates an ir_prog pass for lower_intrinsics.
188 * @param name the name of this pass or NULL
189 * @param list an array of intrinsic map records
190 * @param length the length of the array
191 * @param part_block_used set to true if part_block() must be using during lowering
193 ir_prog_pass_t *lower_intrinsics_pass(
195 i_record *list, int length, int part_block_used)
197 struct pass_t *pass = xmalloc(sizeof(*pass) + (length-1) * sizeof(pass->list[0]));
199 memcpy(pass->list, list, sizeof(list[0]) * length);
200 pass->length = length;
201 pass->part_block_used = part_block_used;
203 return def_prog_pass_constructor(
204 &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
205 } /* lower_intrinsics_pass*/
208 * Helper function, replace the call by the given node.
210 * @param irn the result node
211 * @param call the call to replace
212 * @param mem the new mem result
213 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
214 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
216 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp)
218 ir_node *block = get_nodes_block(call);
220 if (reg_jmp == NULL) {
222 /* Beware: do we need here a protection against CSE? Better we do it. */
223 int old_cse = get_opt_cse();
225 reg_jmp = new_r_Jmp(block);
226 set_opt_cse(old_cse);
229 irn = new_r_Tuple(block, 1, &irn);
231 turn_into_tuple(call, pn_Call_max);
232 set_Tuple_pred(call, pn_Call_M, mem);
233 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
234 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
235 set_Tuple_pred(call, pn_Call_T_result, irn);
236 set_Tuple_pred(call, pn_Call_P_value_res_base, new_Bad());
239 /* A mapper for the integer abs. */
240 int i_mapper_abs(ir_node *call, void *ctx)
242 ir_node *mem = get_Call_mem(call);
243 ir_node *block = get_nodes_block(call);
244 ir_node *op = get_Call_param(call, 0);
246 dbg_info *dbg = get_irn_dbg_info(call);
249 irn = new_rd_Abs(dbg, block, op, get_irn_mode(op));
250 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
251 replace_call(irn, call, mem, NULL, NULL);
255 /* A mapper for the integer bswap. */
256 int i_mapper_bswap(ir_node *call, void *ctx)
258 ir_node *mem = get_Call_mem(call);
259 ir_node *block = get_nodes_block(call);
260 ir_node *op = get_Call_param(call, 0);
261 ir_type *tp = get_Call_type(call);
262 dbg_info *dbg = get_irn_dbg_info(call);
266 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
267 set_irn_pinned(irn, op_pin_state_floats);
268 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ABS);
269 irn = new_r_Proj(block, irn, get_irn_mode(op), pn_Builtin_1_result);
270 replace_call(irn, call, mem, NULL, NULL);
272 } /* i_mapper_bswap */
274 /* A mapper for the alloca() function. */
275 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)
309 ir_node *op = get_Call_param(call, 0);
315 tv = get_Const_tarval(op);
316 if (! tarval_is_null(tv) && !tarval_is_one(tv))
319 mem = get_Call_mem(call);
321 /* sqrt(0) = 0, sqrt(1) = 1 */
322 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
323 replace_call(op, call, mem, NULL, NULL);
325 } /* i_mapper_sqrt */
327 /* A mapper for the floating point cbrt. */
328 int i_mapper_cbrt(ir_node *call, void *ctx)
332 ir_node *op = get_Call_param(call, 0);
338 tv = get_Const_tarval(op);
339 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
342 mem = get_Call_mem(call);
344 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
345 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
346 replace_call(op, call, mem, NULL, NULL);
348 } /* i_mapper_cbrt */
350 /* A mapper for the floating point pow. */
351 int i_mapper_pow(ir_node *call, void *ctx)
355 ir_node *left = get_Call_param(call, 0);
356 ir_node *right = get_Call_param(call, 1);
357 ir_node *block = get_nodes_block(call);
358 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
361 if (is_Const(left) && is_Const_one(left)) {
362 /* pow (1.0, x) = 1.0 */
364 } else if (is_Const(right)) {
365 tarval *tv = get_Const_tarval(right);
366 if (tarval_is_null(tv)) {
367 /* pow(x, 0.0) = 1.0 */
368 ir_mode *mode = get_tarval_mode(tv);
369 irn = new_Const(get_mode_one(mode));
370 } else if (tarval_is_one(tv)) {
371 /* pow(x, 1.0) = x */
373 } else if (tarval_is_minus_one(tv)) {
374 /* pow(x, -1.0) = 1/x */
382 mem = get_Call_mem(call);
383 dbg = get_irn_dbg_info(call);
386 ir_mode *mode = get_irn_mode(left);
389 irn = new_Const(get_mode_one(mode));
390 quot = new_rd_Quot(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
391 mem = new_r_Proj(block, quot, mode_M, pn_Quot_M);
392 irn = new_r_Proj(block, quot, mode, pn_Quot_res);
393 reg_jmp = new_r_Proj(block, quot, mode_X, pn_Quot_X_regular);
394 exc_jmp = new_r_Proj(block, quot, mode_X, pn_Quot_X_except);
396 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
397 replace_call(irn, call, mem, reg_jmp, exc_jmp);
401 /* A mapper for the floating point exp. */
402 int i_mapper_exp(ir_node *call, void *ctx)
404 ir_node *val = get_Call_param(call, 0);
407 if (is_Const(val) && is_Const_null(val)) {
409 ir_mode *mode = get_irn_mode(val);
410 ir_node *irn = new_Const(get_mode_one(mode));
411 ir_node *mem = get_Call_mem(call);
412 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
413 replace_call(irn, call, mem, NULL, NULL);
420 * A mapper for mapping f(0.0) to 0.0.
422 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
424 ir_node *val = get_Call_param(call, 0);
427 if (is_Const(val) && is_Const_null(val)) {
429 ir_node *mem = get_Call_mem(call);
430 DBG_OPT_ALGSIM0(call, val, reason);
431 replace_call(val, call, mem, NULL, NULL);
435 } /* i_mapper_zero_to_zero */
438 * A mapper for mapping f(1.0) to 0.0.
440 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
442 ir_node *val = get_Call_param(call, 0);
445 if (is_Const(val) && is_Const_one(val)) {
446 /* acos(1.0) = 0.0 */
447 ir_mode *mode = get_irn_mode(val);
448 ir_node *irn = new_Const(get_mode_null(mode));
449 ir_node *mem = get_Call_mem(call);
450 DBG_OPT_ALGSIM0(call, irn, reason);
451 replace_call(irn, call, mem, NULL, NULL);
455 } /* i_mapper_one_to_zero */
458 * A mapper for mapping a functions with the following characteristics:
462 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
464 ir_node *val = get_Call_param(call, 0);
467 if (is_strictConv(val)) {
468 ir_node *op = get_Conv_op(val);
470 /* f(-x) = f(x) with strictConv */
471 ir_node *block = get_nodes_block(call);
472 ir_mode *mode = get_irn_mode(val);
473 dbg_info *dbg = get_irn_dbg_info(val);
475 op = get_Minus_op(op);
476 val = new_rd_Conv(dbg, block, op, mode);
479 set_Conv_strict(val, 1);
481 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
482 set_Call_param(call, 0, val);
484 } else if (is_Minus(val)) {
486 val = get_Minus_op(val);
487 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
488 set_Call_param(call, 0, val);
491 if (is_Const(val) && is_Const_null(val)) {
493 ir_mode *mode = get_irn_mode(val);
494 ir_node *irn = new_Const(get_mode_one(mode));
495 ir_node *mem = get_Call_mem(call);
496 DBG_OPT_ALGSIM0(call, irn, reason);
497 replace_call(irn, call, mem, NULL, NULL);
501 } /* i_mapper_symmetric_zero_to_one */
503 /* A mapper for the floating point log. */
504 int i_mapper_log(ir_node *call, void *ctx)
507 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
510 /* A mapper for the floating point sin. */
511 int i_mapper_sin(ir_node *call, void *ctx)
514 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
517 /* A mapper for the floating point cos. */
518 int i_mapper_cos(ir_node *call, void *ctx)
520 /* cos(0.0) = 1.0, cos(-x) = x */
521 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
524 /* A mapper for the floating point tan. */
525 int i_mapper_tan(ir_node *call, void *ctx)
528 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
531 /* A mapper for the floating point asin. */
532 int i_mapper_asin(ir_node *call, void *ctx)
534 /* asin(0.0) = 0.0 */
535 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
536 } /* i_mapper_asin */
538 /* A mapper for the floating point acos. */
539 int i_mapper_acos(ir_node *call, void *ctx)
541 /* acos(1.0) = 0.0 */
542 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
543 } /* i_mapper_acos */
545 /* A mapper for the floating point atan. */
546 int i_mapper_atan(ir_node *call, void *ctx)
548 /* atan(0.0) = 0.0 */
549 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
550 } /* i_mapper_atan */
552 /* A mapper for the floating point sinh. */
553 int i_mapper_sinh(ir_node *call, void *ctx)
555 /* sinh(0.0) = 0.0 */
556 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
557 } /* i_mapper_sinh */
559 /* A mapper for the floating point cosh. */
560 int i_mapper_cosh(ir_node *call, void *ctx)
562 /* cosh(0.0) = 1.0, cosh(-x) = x */
563 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
564 } /* i_mapper_cosh */
566 /* A mapper for the floating point tanh. */
567 int i_mapper_tanh(ir_node *call, void *ctx)
569 /* tanh(0.0) = 0.0 */
570 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
571 } /* i_mapper_tanh */
574 * Return the const entity that is accessed through the pointer ptr or
575 * NULL if there is no entity (or the entity is not constant).
577 * @param ptr the pointer
579 static ir_entity *get_const_entity(ir_node *ptr)
581 if (is_Global(ptr)) {
582 ir_entity *ent = get_Global_entity(ptr);
584 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
585 /* a constant entity */
590 } /* get_const_entity */
592 static bool initializer_val_is_null(ir_initializer_t *init)
596 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
599 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
600 tv = get_initializer_tarval_value(init);
601 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
602 ir_node *irn = get_initializer_const_value(init);
605 tv = get_Const_tarval(irn);
610 return tarval_is_null(tv);
614 * Calculate the value of strlen if possible.
616 * @param ent the entity
617 * @param res_tp the result type
619 * @return a Const node containing the strlen() result or NULL
620 * if the evaluation fails
622 static ir_node *eval_strlen(ir_entity *ent, ir_type *res_tp)
624 ir_type *tp = get_entity_type(ent);
626 ir_initializer_t *initializer;
630 if (! is_Array_type(tp))
632 tp = get_array_element_type(tp);
633 if (! is_Primitive_type(tp))
635 mode = get_type_mode(tp);
637 /* FIXME: This is too restrict, as the type char might be more the 8bits */
638 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
641 if (!has_entity_initializer(ent)) {
646 n = get_compound_ent_n_values(ent);
647 for (i = 0; i < n; ++i) {
648 ir_node *irn = get_compound_ent_value(ent, i);
653 if (is_Const_null(irn)) {
654 /* found the length */
660 tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
661 return new_Const_type(tv, res_tp);
666 initializer = get_entity_initializer(ent);
667 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
670 size = get_initializer_compound_n_entries(initializer);
671 for (i = 0; i < size; ++i) {
672 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
673 if (initializer_val_is_null(val)) {
674 tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
675 return new_Const_type(tv, res_tp);
682 /* A mapper for strlen */
683 int i_mapper_strlen(ir_node *call, void *ctx)
685 ir_node *s = get_Call_param(call, 0);
686 ir_entity *ent = get_const_entity(s);
690 /* FIXME: this cannot handle constant strings inside struct initializers yet */
692 /* a constant entity */
693 ir_type *tp = get_Call_type(call);
696 tp = get_method_res_type(tp, 0);
697 irn = eval_strlen(ent, tp);
700 ir_node *mem = get_Call_mem(call);
701 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
702 replace_call(irn, call, mem, NULL, NULL);
707 } /* i_mapper_strlen */
710 * Calculate the value of strlen if possible.
712 * @param left the left entity
713 * @param right the right entity
714 * @param res_tp the result type
716 * @return a Const node containing the strcmp() result or NULL
717 * if the evaluation fails
719 static ir_node *eval_strcmp(ir_entity *left, ir_entity *right, ir_type *res_tp)
725 tp = get_entity_type(left);
726 if (! is_Array_type(tp))
728 tp = get_array_element_type(tp);
729 if (! is_Primitive_type(tp))
731 mode = get_type_mode(tp);
733 /* FIXME: This is too restrict, as the type char might be more the 8bits */
734 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
737 tp = get_entity_type(right);
738 if (! is_Array_type(tp))
740 tp = get_array_element_type(tp);
741 if (! is_Primitive_type(tp))
743 mode = get_type_mode(tp);
745 /* FIXME: This is too restrict, as the type char might be more the 8bits */
746 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
749 if (!has_entity_initializer(left) && !has_entity_initializer(right)) {
750 /* code that uses deprecated compound_graph_path stuff */
752 n = get_compound_ent_n_values(left);
753 n_r = get_compound_ent_n_values(right);
756 for (i = 0; i < n; ++i) {
761 irn = get_compound_ent_value(left, i);
764 tv = get_Const_tarval(irn);
765 v_l = get_tarval_long(tv);
767 irn = get_compound_ent_value(right, i);
770 tv = get_Const_tarval(irn);
771 v_r = get_tarval_long(tv);
788 /* we found an end */
789 tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
790 return new_Const_type(tv, res_tp);
801 * Checks if an entity represents the empty string.
803 * @param ent the entity
805 * @return non-zero if ent represents the empty string
807 static int is_empty_string(ir_entity *ent)
809 ir_type *tp = get_entity_type(ent);
812 ir_initializer_t *initializer;
813 ir_initializer_t *init0;
815 if (! is_Array_type(tp))
817 tp = get_array_element_type(tp);
818 if (! is_Primitive_type(tp))
820 mode = get_type_mode(tp);
822 /* FIXME: This is too restrict, as the type char might be more the 8bits */
823 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
826 if (!has_entity_initializer(ent)) {
827 /* code for deprecated compound_graph_path stuff */
828 int n = get_compound_ent_n_values(ent);
831 irn = get_compound_ent_value(ent, 0);
833 return is_Const(irn) && is_Const_null(irn);
836 initializer = get_entity_initializer(ent);
837 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
840 if (get_initializer_compound_n_entries(initializer) < 1)
843 init0 = get_initializer_compound_value(initializer, 0);
844 return initializer_val_is_null(init0);
845 } /* is_empty_string */
847 /* A mapper for strcmp */
848 int i_mapper_strcmp(ir_node *call, void *ctx)
850 ir_node *left = get_Call_param(call, 0);
851 ir_node *right = get_Call_param(call, 1);
855 ir_type *call_tp = get_Call_type(call);
856 ir_type *res_tp = get_method_res_type(call_tp, 0);
857 ir_entity *ent_l, *ent_r;
863 /* do some type checks first */
864 if (! is_Primitive_type(res_tp))
866 char_tp = get_method_param_type(call_tp, 0);
867 if (char_tp != get_method_param_type(call_tp, 1))
869 if (! is_Pointer_type(char_tp))
871 char_tp = get_pointer_points_to_type(char_tp);
874 /* a strcmp(s, s) ==> 0 */
875 ir_node *mem = get_Call_mem(call);
876 ir_mode *mode = get_type_mode(res_tp);
878 irn = new_Const(get_mode_null(mode));
879 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
880 replace_call(irn, call, mem, NULL, NULL);
883 ent_l = get_const_entity(left);
884 ent_r = get_const_entity(right);
886 if (ent_l != NULL && ent_r != NULL) {
887 /* both entities are const, try to evaluate */
888 irn = eval_strcmp(ent_l, ent_r, res_tp);
889 } else if (ent_l != NULL) {
890 if (is_empty_string(ent_l)) {
891 /* s strcmp("", s) ==> -(*s)*/
893 goto replace_by_call;
895 } else if (ent_r != NULL) {
896 if (is_empty_string(ent_r)) {
897 /* s strcmp(s, "") ==> (*s) */
898 ir_node *mem, *block;
904 mem = get_Call_mem(call);
905 block = get_nodes_block(call);
906 dbg = get_irn_dbg_info(call);
907 mode = get_type_mode(char_tp);
909 /* replace the strcmp by (*x) */
910 irn = new_rd_Load(dbg, block, mem, v, mode, 0);
911 mem = new_r_Proj(block, irn, mode_M, pn_Load_M);
912 exc = new_r_Proj(block, irn, mode_X, pn_Load_X_except);
913 reg = new_r_Proj(block, irn, mode_X, pn_Load_X_regular);
914 irn = new_r_Proj(block, irn, mode, pn_Load_res);
916 /* conv to the result mode */
917 mode = get_type_mode(res_tp);
918 irn = new_rd_Conv(dbg, block, irn, mode);
921 /* negate in the ("", s) case */
922 irn = new_rd_Minus(dbg, block, irn, mode);
928 ir_node *mem = get_Call_mem(call);
929 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
930 replace_call(irn, call, mem, reg, exc);
935 } /* i_mapper_strcmp */
937 /* A mapper for strncmp */
938 int i_mapper_strncmp(ir_node *call, void *ctx)
940 ir_node *left = get_Call_param(call, 0);
941 ir_node *right = get_Call_param(call, 1);
942 ir_node *len = get_Call_param(call, 2);
946 if (left == right || (is_Const(len) && is_Const_null(len))) {
947 /* a strncmp(s, s, len) ==> 0 OR
948 a strncmp(a, b, 0) ==> 0 */
949 ir_node *mem = get_Call_mem(call);
950 ir_node *adr = get_Call_ptr(call);
951 ir_entity *ent = get_SymConst_entity(adr);
952 ir_type *call_tp = get_entity_type(ent);
953 ir_type *res_tp = get_method_res_type(call_tp, 0);
954 ir_mode *mode = get_type_mode(res_tp);
956 irn = new_Const(get_mode_null(mode));
957 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
958 replace_call(irn, call, mem, NULL, NULL);
962 } /* i_mapper_strncmp */
964 /* A mapper for strcpy */
965 int i_mapper_strcpy(ir_node *call, void *ctx)
967 ir_node *dst = get_Call_param(call, 0);
968 ir_node *src = get_Call_param(call, 1);
972 /* a strcpy(d, s) ==> d */
973 ir_node *mem = get_Call_mem(call);
974 ir_node *dst = get_Call_param(call, 0);
976 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
977 replace_call(dst, call, mem, NULL, NULL);
981 } /* i_mapper_strcpy */
983 /* A mapper for memcpy */
984 int i_mapper_memcpy(ir_node *call, void *ctx)
986 ir_node *dst = get_Call_param(call, 0);
987 ir_node *src = get_Call_param(call, 1);
988 ir_node *len = get_Call_param(call, 2);
991 if (dst == src || (is_Const(len) && is_Const_null(len))) {
992 /* a memcpy(d, d, len) ==> d OR
993 a memcpy(d, s, 0) ==> d */
994 ir_node *mem = get_Call_mem(call);
996 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
997 replace_call(dst, call, mem, NULL, NULL);
1001 } /* i_mapper_memcpy */
1003 /* A mapper for mempcpy */
1004 int i_mapper_mempcpy(ir_node *call, void *ctx)
1006 ir_node *dst = get_Call_param(call, 0);
1007 ir_node *src = get_Call_param(call, 1);
1008 ir_node *len = get_Call_param(call, 2);
1011 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1012 /* a memcpy(d, d, len) ==> d + len OR
1013 a memcpy(d, s, 0) ==> d + 0 */
1014 dbg_info *dbg = get_irn_dbg_info(call);
1015 ir_node *mem = get_Call_mem(call);
1016 ir_node *blk = get_nodes_block(call);
1017 ir_mode *mode = get_irn_mode(dst);
1018 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
1020 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
1021 replace_call(res, call, mem, NULL, NULL);
1025 } /* i_mapper_mempcpy */
1027 /* A mapper for memmove */
1028 int i_mapper_memmove(ir_node *call, void *ctx)
1030 ir_node *dst = get_Call_param(call, 0);
1031 ir_node *src = get_Call_param(call, 1);
1032 ir_node *len = get_Call_param(call, 2);
1035 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1036 /* a memmove(d, d, len) ==> d OR
1037 a memmove(d, s, 0) ==> d */
1038 ir_node *mem = get_Call_mem(call);
1040 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
1041 replace_call(dst, call, mem, NULL, NULL);
1045 } /* i_mapper_memmove */
1047 /* A mapper for memset */
1048 int i_mapper_memset(ir_node *call, void *ctx)
1050 ir_node *len = get_Call_param(call, 2);
1053 if (is_Const(len) && is_Const_null(len)) {
1054 /* a memset(d, C, 0) ==> d */
1055 ir_node *mem = get_Call_mem(call);
1056 ir_node *dst = get_Call_param(call, 0);
1058 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
1059 replace_call(dst, call, mem, NULL, NULL);
1063 } /* i_mapper_memset */
1065 /* A mapper for memcmp */
1066 int i_mapper_memcmp(ir_node *call, void *ctx)
1068 ir_node *left = get_Call_param(call, 0);
1069 ir_node *right = get_Call_param(call, 1);
1070 ir_node *len = get_Call_param(call, 2);
1074 if (left == right || (is_Const(len) && is_Const_null(len))) {
1075 /* a memcmp(s, s, len) ==> 0 OR
1076 a memcmp(a, b, 0) ==> 0 */
1077 ir_node *mem = get_Call_mem(call);
1078 ir_node *adr = get_Call_ptr(call);
1079 ir_entity *ent = get_SymConst_entity(adr);
1080 ir_type *call_tp = get_entity_type(ent);
1081 ir_type *res_tp = get_method_res_type(call_tp, 0);
1082 ir_mode *mode = get_type_mode(res_tp);
1084 irn = new_Const(get_mode_null(mode));
1085 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1086 replace_call(irn, call, mem, NULL, NULL);
1090 } /* i_mapper_memcmp */
1093 * Returns the result mode of a node.
1095 static ir_mode *get_irn_res_mode(ir_node *node)
1097 switch (get_irn_opcode(node)) {
1098 case iro_Load: return get_Load_mode(node);
1099 case iro_Quot: return get_Quot_resmode(node);
1100 case iro_Div: return get_Div_resmode(node);
1101 case iro_Mod: return get_Mod_resmode(node);
1102 case iro_DivMod: return get_DivMod_resmode(node);
1103 default: return NULL;
1105 } /* get_irn_res_mode */
1107 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
1109 /* A mapper for mapping unsupported instructions to runtime calls. */
1110 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt)
1112 int i, j, arity, first, n_param, n_res;
1115 ir_node *mem, *bl, *call, *addr, *res_proj;
1118 symconst_symbol sym;
1119 ir_mode *mode = get_irn_mode(node);
1121 if (mode != rt->mode)
1123 /* check if the result modes match */
1124 if (mode == mode_T && rt->res_mode != NULL) {
1125 mode = get_irn_res_mode(node);
1126 if (mode != rt->res_mode)
1130 arity = get_irn_arity(node);
1134 mtp = get_entity_type(rt->ent);
1135 n_param = get_method_n_params(mtp);
1136 irg = current_ir_graph;
1138 mem = get_irn_n(node, 0);
1139 if (get_irn_mode(mem) != mode_M) {
1140 mem = new_r_NoMem(irg);
1145 /* check if the modes of the predecessors match the parameter modes */
1146 if (arity - first != n_param)
1149 for (i = first, j = 0; i < arity; ++i, ++j) {
1150 ir_type *param_tp = get_method_param_type(mtp, j);
1151 ir_node *pred = get_irn_n(node, i);
1153 if (get_type_mode(param_tp) != get_irn_mode(pred))
1157 n_res = get_method_n_ress(mtp);
1159 /* step 0: calculate the number of needed Proj's */
1161 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
1162 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1163 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1164 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
1165 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
1168 if (rt->mode != mode_T) /* must be mode_T */
1173 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1177 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1178 bl = get_nodes_block(node);
1182 NEW_ARR_A(ir_node *, in, n_param);
1183 for (i = 0; i < n_param; ++i)
1184 in[i] = get_irn_n(node, first + i);
1187 /* step 1: create the call */
1188 sym.entity_p = rt->ent;
1189 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1190 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1191 set_irn_pinned(call, get_irn_pinned(node));
1194 res_proj = new_r_Proj(bl, call, mode_T, pn_Call_T_result);
1199 n_proj += n_res - 1;
1202 turn_into_tuple(node, n_proj);
1204 for (i = 0; i < n_proj; ++i)
1205 set_Tuple_pred(node, i, new_r_Bad(irg));
1206 if (rt->mem_proj_nr >= 0)
1207 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(bl, call, mode_M, pn_Call_M));
1208 if (!is_NoMem(mem)) {
1209 /* Exceptions can only be handled with real memory */
1210 if (rt->regular_proj_nr >= 0)
1211 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(bl, call, mode_X, pn_Call_X_regular));
1212 if (rt->exc_proj_nr >= 0)
1213 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(bl, call, mode_X, pn_Call_X_except));
1214 if (rt->exc_mem_proj_nr >= 0)
1215 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(bl, call, mode_M, pn_Call_M));
1218 if (rt->res_proj_nr >= 0)
1219 for (i = 0; i < n_res; ++i)
1220 set_Tuple_pred(node, rt->res_proj_nr + i,
1221 new_r_Proj(bl, res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
1224 /* only one return value supported */
1226 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1228 res_proj = new_r_Proj(bl, call, mode_T, pn_Call_T_result);
1229 res_proj = new_r_Proj(bl, res_proj, mode, 0);
1231 exchange(node, res_proj);
1235 /* should not happen */
1237 } /* i_mapper_RuntimeCall */