2 * Copyright (C) 1995-2011 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"
48 /** Walker environment. */
49 typedef struct walker_env {
50 pmap *c_map; /**< The intrinsic call map. */
51 size_t nr_of_intrinsics; /**< statistics */
52 i_instr_record **i_map; /**< The intrinsic instruction map. */
56 * walker: call all mapper functions
58 static void call_mapper(ir_node *node, void *env)
60 walker_env_t *wenv = (walker_env_t*)env;
61 ir_op *op = get_irn_op(node);
66 const i_call_record *r;
69 symconst = get_Call_ptr(node);
70 if (! is_Global(symconst))
73 ent = get_Global_entity(symconst);
74 p = pmap_find(wenv->c_map, ent);
77 r = (const i_call_record*)p->value;
78 wenv->nr_of_intrinsics += r->i_mapper(node, r->ctx) ? 1 : 0;
81 if (op->code < (unsigned) ARR_LEN(wenv->i_map)) {
82 const i_instr_record *r = wenv->i_map[op->code];
83 /* run all possible mapper */
85 if (r->i_mapper(node, r->ctx)) {
86 ++wenv->nr_of_intrinsics;
89 r = (const i_instr_record*)r->link;
95 /* Go through all graphs and map calls to intrinsic functions. */
96 size_t lower_intrinsics(i_record *list, size_t length, int part_block_used)
99 size_t n_ops = get_irp_n_opcodes();
101 pmap *c_map = pmap_create_ex(length);
102 i_instr_record **i_map;
103 size_t nr_of_intrinsics = 0;
106 /* we use the ir_op generic pointers here */
107 NEW_ARR_A(i_instr_record *, i_map, n_ops);
108 memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
110 /* fill a map for faster search */
111 for (i = 0; i < length; ++i) {
112 if (list[i].i_call.kind == INTRINSIC_CALL) {
113 pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
115 ir_op *op = list[i].i_instr.op;
116 assert(op->code < (unsigned) ARR_LEN(i_map));
118 list[i].i_instr.link = i_map[op->code];
119 i_map[op->code] = &list[i].i_instr;
126 for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
127 irg = get_irp_irg(i);
129 if (part_block_used) {
130 ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
131 collect_phiprojs(irg);
134 wenv.nr_of_intrinsics = 0;
135 irg_walk_graph(irg, NULL, call_mapper, &wenv);
138 ir_free_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
140 if (wenv.nr_of_intrinsics > 0) {
141 /* Changes detected: we might have added/removed nodes. */
142 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
144 /* Exception control flow might have changed / new block might have added. */
145 set_irg_doms_inconsistent(irg);
146 set_irg_extblk_inconsistent(irg);
148 /* Calls might be removed/added. */
149 set_trouts_inconsistent();
152 irg_verify(irg, VERIFY_NORMAL);
154 nr_of_intrinsics += wenv.nr_of_intrinsics;
159 return nr_of_intrinsics;
160 } /* lower_intrinsics */
162 typedef struct pass_t {
171 * Wrapper for running lower_intrinsics() as an ir_prog pass.
173 static int pass_wrapper(ir_prog *irp, void *context)
175 pass_t *pass = (pass_t*)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, size_t length, int part_block_used)
194 pass_t *const pass = XMALLOCF(pass_t, list, length);
195 memcpy(pass->list, list, sizeof(list[0]) * length);
196 pass->length = length;
197 pass->part_block_used = part_block_used;
199 return def_prog_pass_constructor(
200 &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
201 } /* lower_intrinsics_pass*/
204 * Helper function, replace the call by the given node.
206 * @param irn the result node
207 * @param call the call to replace
208 * @param mem the new mem result
209 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
210 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
212 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);
215 ir_graph *irg = get_irn_irg(block);
217 if (reg_jmp == NULL) {
219 /* Beware: do we need here a protection against CSE? Better we do it. */
220 int old_cse = get_opt_cse();
222 reg_jmp = new_r_Jmp(block);
223 set_opt_cse(old_cse);
224 exc_jmp = new_r_Bad(irg, mode_X);
226 irn = new_r_Tuple(block, 1, &irn);
228 turn_into_tuple(call, pn_Call_max);
229 set_Tuple_pred(call, pn_Call_M, mem);
230 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
231 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
232 set_Tuple_pred(call, pn_Call_T_result, irn);
235 /* A mapper for the integer abs. */
236 int i_mapper_abs(ir_node *call, void *ctx)
238 ir_node *mem = get_Call_mem(call);
239 ir_node *block = get_nodes_block(call);
240 ir_node *op = get_Call_param(call, 0);
241 ir_graph *irg = get_irn_irg(call);
242 ir_mode *mode = get_irn_mode(op);
243 dbg_info *dbg = get_irn_dbg_info(call);
244 ir_node *zero = new_r_Const(irg, get_mode_null(mode));
245 ir_node *cmp = new_rd_Cmp(dbg, block, op, zero, ir_relation_less);
246 ir_node *minus_op = new_rd_Minus(dbg, block, op, mode);
248 arch_allow_ifconv_func allow_ifconv = be_get_backend_param()->allow_ifconv;
251 /* mux allowed by backend? */
252 if (!allow_ifconv(cmp, op, minus_op))
256 mux = new_rd_Mux(dbg, block, cmp, op, minus_op, mode);
257 DBG_OPT_ALGSIM0(call, mux, FS_OPT_RTS_ABS);
258 replace_call(mux, call, mem, NULL, NULL);
262 /* A mapper for the integer bswap. */
263 int i_mapper_bswap(ir_node *call, void *ctx)
265 ir_node *mem = get_Call_mem(call);
266 ir_node *block = get_nodes_block(call);
267 ir_node *op = get_Call_param(call, 0);
268 ir_type *tp = get_Call_type(call);
269 dbg_info *dbg = get_irn_dbg_info(call);
273 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
274 set_irn_pinned(irn, op_pin_state_floats);
275 irn = new_r_Proj(irn, get_irn_mode(op), pn_Builtin_1_result);
276 replace_call(irn, call, mem, NULL, NULL);
278 } /* i_mapper_bswap */
280 /* A mapper for the alloca() function. */
281 int i_mapper_alloca(ir_node *call, void *ctx)
283 ir_node *mem = get_Call_mem(call);
284 ir_node *block = get_nodes_block(call);
285 ir_node *op = get_Call_param(call, 0);
286 ir_node *irn, *exc, *no_exc;
287 dbg_info *dbg = get_irn_dbg_info(call);
290 if (mode_is_signed(get_irn_mode(op))) {
291 ir_mode *mode = get_irn_mode(op);
292 mode = find_unsigned_mode(mode);
294 panic("Cannot find unsigned mode for %M", mode);
296 op = new_rd_Conv(dbg, block, op, mode);
299 irn = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
300 mem = new_rd_Proj(dbg, irn, mode_M, pn_Alloc_M);
301 no_exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_regular);
302 exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_except);
303 irn = new_rd_Proj(dbg, irn, get_modeP_data(), pn_Alloc_res);
305 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
306 replace_call(irn, call, mem, no_exc, exc);
308 } /* i_mapper_alloca */
310 /* A mapper for the floating point sqrt. */
311 int i_mapper_sqrt(ir_node *call, void *ctx)
315 ir_node *op = get_Call_param(call, 0);
321 tv = get_Const_tarval(op);
322 if (! tarval_is_null(tv) && !tarval_is_one(tv))
325 mem = get_Call_mem(call);
327 /* sqrt(0) = 0, sqrt(1) = 1 */
328 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
329 replace_call(op, call, mem, NULL, NULL);
331 } /* i_mapper_sqrt */
333 /* A mapper for the floating point cbrt. */
334 int i_mapper_cbrt(ir_node *call, void *ctx)
338 ir_node *op = get_Call_param(call, 0);
344 tv = get_Const_tarval(op);
345 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
348 mem = get_Call_mem(call);
350 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
351 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
352 replace_call(op, call, mem, NULL, NULL);
354 } /* i_mapper_cbrt */
356 /* A mapper for the floating point pow. */
357 int i_mapper_pow(ir_node *call, void *ctx)
361 ir_node *left = get_Call_param(call, 0);
362 ir_node *right = get_Call_param(call, 1);
363 ir_node *block = get_nodes_block(call);
364 ir_graph *irg = get_irn_irg(block);
365 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
368 if (is_Const(left) && is_Const_one(left)) {
369 /* pow (1.0, x) = 1.0 */
371 } else if (is_Const(right)) {
372 ir_tarval *tv = get_Const_tarval(right);
373 if (tarval_is_null(tv)) {
374 /* pow(x, 0.0) = 1.0 */
375 ir_mode *mode = get_tarval_mode(tv);
376 irn = new_r_Const(irg, get_mode_one(mode));
377 } else if (tarval_is_one(tv)) {
378 /* pow(x, 1.0) = x */
380 } else if (tarval_is_minus_one(tv)) {
381 /* pow(x, -1.0) = 1/x */
389 mem = get_Call_mem(call);
390 dbg = get_irn_dbg_info(call);
393 ir_mode *mode = get_irn_mode(left);
396 irn = new_r_Const(irg, get_mode_one(mode));
397 div = new_rd_Div(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
398 mem = new_r_Proj(div, mode_M, pn_Div_M);
399 irn = new_r_Proj(div, mode, pn_Div_res);
400 reg_jmp = new_r_Proj(div, mode_X, pn_Div_X_regular);
401 exc_jmp = new_r_Proj(div, mode_X, pn_Div_X_except);
403 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
404 replace_call(irn, call, mem, reg_jmp, exc_jmp);
408 /* A mapper for the floating point exp. */
409 int i_mapper_exp(ir_node *call, void *ctx)
411 ir_node *val = get_Call_param(call, 0);
414 if (is_Const(val) && is_Const_null(val)) {
416 ir_graph *irg = get_irn_irg(val);
417 ir_mode *mode = get_irn_mode(val);
418 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
419 ir_node *mem = get_Call_mem(call);
420 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
421 replace_call(irn, call, mem, NULL, NULL);
428 * A mapper for mapping f(0.0) to 0.0.
430 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
432 ir_node *val = get_Call_param(call, 0);
435 if (is_Const(val) && is_Const_null(val)) {
437 ir_node *mem = get_Call_mem(call);
438 DBG_OPT_ALGSIM0(call, val, reason);
439 replace_call(val, call, mem, NULL, NULL);
443 } /* i_mapper_zero_to_zero */
446 * A mapper for mapping f(1.0) to 0.0.
448 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
450 ir_node *val = get_Call_param(call, 0);
453 if (is_Const(val) && is_Const_one(val)) {
454 /* acos(1.0) = 0.0 */
455 ir_graph *irg = get_irn_irg(val);
456 ir_mode *mode = get_irn_mode(val);
457 ir_node *irn = new_r_Const(irg, get_mode_null(mode));
458 ir_node *mem = get_Call_mem(call);
459 DBG_OPT_ALGSIM0(call, irn, reason);
460 replace_call(irn, call, mem, NULL, NULL);
464 } /* i_mapper_one_to_zero */
467 * A mapper for mapping a functions with the following characteristics:
471 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
474 ir_node *val = get_Call_param(call, 0);
477 if (is_strictConv(val)) {
478 ir_node *op = get_Conv_op(val);
480 /* f(-x) = f(x) with strictConv */
481 ir_node *block = get_nodes_block(call);
482 ir_mode *mode = get_irn_mode(val);
483 dbg_info *dbg = get_irn_dbg_info(val);
485 op = get_Minus_op(op);
486 val = new_rd_Conv(dbg, block, op, mode);
489 set_Conv_strict(val, 1);
491 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
492 set_Call_param(call, 0, val);
495 } else if (is_Minus(val)) {
497 val = get_Minus_op(val);
498 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
499 set_Call_param(call, 0, val);
503 if (is_Const(val) && is_Const_null(val)) {
505 ir_graph *irg = get_irn_irg(val);
506 ir_mode *mode = get_irn_mode(val);
507 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
508 ir_node *mem = get_Call_mem(call);
509 DBG_OPT_ALGSIM0(call, irn, reason);
510 replace_call(irn, call, mem, NULL, NULL);
514 } /* i_mapper_symmetric_zero_to_one */
516 /* A mapper for the floating point log. */
517 int i_mapper_log(ir_node *call, void *ctx)
520 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
523 /* A mapper for the floating point sin. */
524 int i_mapper_sin(ir_node *call, void *ctx)
527 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
530 /* A mapper for the floating point cos. */
531 int i_mapper_cos(ir_node *call, void *ctx)
533 /* cos(0.0) = 1.0, cos(-x) = x */
534 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
537 /* A mapper for the floating point tan. */
538 int i_mapper_tan(ir_node *call, void *ctx)
541 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
544 /* A mapper for the floating point asin. */
545 int i_mapper_asin(ir_node *call, void *ctx)
547 /* asin(0.0) = 0.0 */
548 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
549 } /* i_mapper_asin */
551 /* A mapper for the floating point acos. */
552 int i_mapper_acos(ir_node *call, void *ctx)
554 /* acos(1.0) = 0.0 */
555 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
556 } /* i_mapper_acos */
558 /* A mapper for the floating point atan. */
559 int i_mapper_atan(ir_node *call, void *ctx)
561 /* atan(0.0) = 0.0 */
562 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
563 } /* i_mapper_atan */
565 /* A mapper for the floating point sinh. */
566 int i_mapper_sinh(ir_node *call, void *ctx)
568 /* sinh(0.0) = 0.0 */
569 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
570 } /* i_mapper_sinh */
572 /* A mapper for the floating point cosh. */
573 int i_mapper_cosh(ir_node *call, void *ctx)
575 /* cosh(0.0) = 1.0, cosh(-x) = x */
576 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
577 } /* i_mapper_cosh */
579 /* A mapper for the floating point tanh. */
580 int i_mapper_tanh(ir_node *call, void *ctx)
582 /* tanh(0.0) = 0.0 */
583 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
584 } /* i_mapper_tanh */
587 * Return the const entity that is accessed through the pointer ptr or
588 * NULL if there is no entity (or the entity is not constant).
590 * @param ptr the pointer
592 static ir_entity *get_const_entity(ir_node *ptr)
594 if (is_Global(ptr)) {
595 ir_entity *ent = get_Global_entity(ptr);
597 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
598 /* a constant entity */
603 } /* get_const_entity */
605 static bool initializer_val_is_null(ir_initializer_t *init)
609 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
612 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
613 tv = get_initializer_tarval_value(init);
614 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
615 ir_node *irn = get_initializer_const_value(init);
618 tv = get_Const_tarval(irn);
623 return tarval_is_null(tv);
627 * Calculate the value of strlen if possible.
629 * @param ent the entity
630 * @param res_tp the result type
632 * @return a Const node containing the strlen() result or NULL
633 * if the evaluation fails
635 static ir_node *eval_strlen(ir_graph *irg, ir_entity *ent, ir_type *res_tp)
637 ir_type *tp = get_entity_type(ent);
639 ir_initializer_t *initializer;
643 if (! is_Array_type(tp))
645 tp = get_array_element_type(tp);
646 if (! is_Primitive_type(tp))
648 mode = get_type_mode(tp);
650 /* FIXME: This is too restrict, as the type char might be more the 8bits */
651 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
654 if (!has_entity_initializer(ent)) {
657 n = get_compound_ent_n_values(ent);
658 for (i = 0; i < n; ++i) {
659 ir_node *irn = get_compound_ent_value(ent, i);
664 if (is_Const_null(irn)) {
665 /* found the length */
666 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
667 return new_r_Const(irg, tv);
673 initializer = get_entity_initializer(ent);
674 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
677 size = get_initializer_compound_n_entries(initializer);
678 for (i = 0; i < size; ++i) {
679 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
680 if (initializer_val_is_null(val)) {
681 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
682 return new_r_Const(irg, tv);
689 /* A mapper for strlen */
690 int i_mapper_strlen(ir_node *call, void *ctx)
692 ir_node *s = get_Call_param(call, 0);
693 ir_entity *ent = get_const_entity(s);
697 /* FIXME: this cannot handle constant strings inside struct initializers yet */
699 /* a constant entity */
700 ir_type *tp = get_Call_type(call);
703 tp = get_method_res_type(tp, 0);
704 irn = eval_strlen(get_irn_irg(call), ent, tp);
707 ir_node *mem = get_Call_mem(call);
708 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
709 replace_call(irn, call, mem, NULL, NULL);
714 } /* i_mapper_strlen */
717 * Calculate the value of strlen if possible.
719 * @param left the left entity
720 * @param right the right entity
721 * @param res_tp the result type
723 * @return a Const node containing the strcmp() result or NULL
724 * if the evaluation fails
726 static ir_node *eval_strcmp(ir_graph *irg, ir_entity *left, ir_entity *right,
732 tp = get_entity_type(left);
733 if (! is_Array_type(tp))
735 tp = get_array_element_type(tp);
736 if (! is_Primitive_type(tp))
738 mode = get_type_mode(tp);
740 /* FIXME: This is too restrict, as the type char might be more the 8bits */
741 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
744 tp = get_entity_type(right);
745 if (! is_Array_type(tp))
747 tp = get_array_element_type(tp);
748 if (! is_Primitive_type(tp))
750 mode = get_type_mode(tp);
752 /* FIXME: This is too restrict, as the type char might be more the 8bits */
753 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
756 if (!has_entity_initializer(left) && !has_entity_initializer(right)) {
757 /* code that uses deprecated compound_graph_path stuff */
758 size_t n = get_compound_ent_n_values(left);
759 size_t n_r = get_compound_ent_n_values(right);
765 for (i = 0; i < n; ++i) {
770 irn = get_compound_ent_value(left, i);
773 tv = get_Const_tarval(irn);
774 v_l = get_tarval_long(tv);
776 irn = get_compound_ent_value(right, i);
779 tv = get_Const_tarval(irn);
780 v_r = get_tarval_long(tv);
797 /* we found an end */
798 ir_tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
799 return new_r_Const(irg, tv);
810 * Checks if an entity represents the empty string.
812 * @param ent the entity
814 * @return non-zero if ent represents the empty string
816 static int is_empty_string(ir_entity *ent)
818 ir_type *tp = get_entity_type(ent);
821 ir_initializer_t *initializer;
822 ir_initializer_t *init0;
824 if (! is_Array_type(tp))
826 tp = get_array_element_type(tp);
827 if (! is_Primitive_type(tp))
829 mode = get_type_mode(tp);
831 /* FIXME: This is too restrict, as the type char might be more the 8bits */
832 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
835 if (!has_entity_initializer(ent)) {
836 /* code for deprecated compound_graph_path stuff */
837 size_t n = get_compound_ent_n_values(ent);
840 irn = get_compound_ent_value(ent, 0);
842 return is_Const(irn) && is_Const_null(irn);
845 initializer = get_entity_initializer(ent);
846 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
849 if (get_initializer_compound_n_entries(initializer) < 1)
852 init0 = get_initializer_compound_value(initializer, 0);
853 return initializer_val_is_null(init0);
854 } /* is_empty_string */
856 /* A mapper for strcmp */
857 int i_mapper_strcmp(ir_node *call, void *ctx)
859 ir_node *left = get_Call_param(call, 0);
860 ir_node *right = get_Call_param(call, 1);
864 ir_type *call_tp = get_Call_type(call);
865 ir_type *res_tp = get_method_res_type(call_tp, 0);
866 ir_entity *ent_l, *ent_r;
872 /* do some type checks first */
873 if (! is_Primitive_type(res_tp))
875 char_tp = get_method_param_type(call_tp, 0);
876 if (char_tp != get_method_param_type(call_tp, 1))
878 if (! is_Pointer_type(char_tp))
880 char_tp = get_pointer_points_to_type(char_tp);
883 /* a strcmp(s, s) ==> 0 */
884 ir_graph *irg = get_irn_irg(call);
885 ir_node *mem = get_Call_mem(call);
886 ir_mode *mode = get_type_mode(res_tp);
888 irn = new_r_Const(irg, get_mode_null(mode));
889 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
890 replace_call(irn, call, mem, NULL, NULL);
893 ent_l = get_const_entity(left);
894 ent_r = get_const_entity(right);
896 if (ent_l != NULL && ent_r != NULL) {
897 /* both entities are const, try to evaluate */
898 irn = eval_strcmp(get_irn_irg(call), ent_l, ent_r, res_tp);
899 } else if (ent_l != NULL) {
900 if (is_empty_string(ent_l)) {
901 /* s strcmp("", s) ==> -(*s)*/
903 goto replace_by_call;
905 } else if (ent_r != NULL) {
906 if (is_empty_string(ent_r)) {
907 /* s strcmp(s, "") ==> (*s) */
908 ir_node *mem, *block;
914 mem = get_Call_mem(call);
915 block = get_nodes_block(call);
916 dbg = get_irn_dbg_info(call);
917 mode = get_type_mode(char_tp);
919 /* replace the strcmp by (*x) */
920 irn = new_rd_Load(dbg, block, mem, v, mode, cons_none);
921 mem = new_r_Proj(irn, mode_M, pn_Load_M);
922 exc = new_r_Proj(irn, mode_X, pn_Load_X_except);
923 reg = new_r_Proj(irn, mode_X, pn_Load_X_regular);
924 irn = new_r_Proj(irn, mode, pn_Load_res);
926 /* conv to the result mode */
927 mode = get_type_mode(res_tp);
928 irn = new_rd_Conv(dbg, block, irn, mode);
931 /* negate in the ("", s) case */
932 irn = new_rd_Minus(dbg, block, irn, mode);
938 ir_node *mem = get_Call_mem(call);
939 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
940 replace_call(irn, call, mem, reg, exc);
945 } /* i_mapper_strcmp */
947 /* A mapper for strncmp */
948 int i_mapper_strncmp(ir_node *call, void *ctx)
950 ir_node *left = get_Call_param(call, 0);
951 ir_node *right = get_Call_param(call, 1);
952 ir_node *len = get_Call_param(call, 2);
956 if (left == right || (is_Const(len) && is_Const_null(len))) {
957 /* a strncmp(s, s, len) ==> 0 OR
958 a strncmp(a, b, 0) ==> 0 */
959 ir_graph *irg = get_irn_irg(call);
960 ir_node *mem = get_Call_mem(call);
961 ir_node *adr = get_Call_ptr(call);
962 ir_entity *ent = get_SymConst_entity(adr);
963 ir_type *call_tp = get_entity_type(ent);
964 ir_type *res_tp = get_method_res_type(call_tp, 0);
965 ir_mode *mode = get_type_mode(res_tp);
967 irn = new_r_Const(irg, get_mode_null(mode));
968 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
969 replace_call(irn, call, mem, NULL, NULL);
973 } /* i_mapper_strncmp */
975 /* A mapper for strcpy */
976 int i_mapper_strcpy(ir_node *call, void *ctx)
978 ir_node *dst = get_Call_param(call, 0);
979 ir_node *src = get_Call_param(call, 1);
983 /* a strcpy(d, s) ==> d */
984 ir_node *mem = get_Call_mem(call);
985 ir_node *dst = get_Call_param(call, 0);
987 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
988 replace_call(dst, call, mem, NULL, NULL);
992 } /* i_mapper_strcpy */
994 /* A mapper for memcpy */
995 int i_mapper_memcpy(ir_node *call, void *ctx)
997 ir_node *dst = get_Call_param(call, 0);
998 ir_node *src = get_Call_param(call, 1);
999 ir_node *len = get_Call_param(call, 2);
1002 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1003 /* a memcpy(d, d, len) ==> d OR
1004 a memcpy(d, s, 0) ==> d */
1005 ir_node *mem = get_Call_mem(call);
1007 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
1008 replace_call(dst, call, mem, NULL, NULL);
1012 } /* i_mapper_memcpy */
1014 /* A mapper for mempcpy */
1015 int i_mapper_mempcpy(ir_node *call, void *ctx)
1017 ir_node *dst = get_Call_param(call, 0);
1018 ir_node *src = get_Call_param(call, 1);
1019 ir_node *len = get_Call_param(call, 2);
1022 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1023 /* a memcpy(d, d, len) ==> d + len OR
1024 a memcpy(d, s, 0) ==> d + 0 */
1025 dbg_info *dbg = get_irn_dbg_info(call);
1026 ir_node *mem = get_Call_mem(call);
1027 ir_node *blk = get_nodes_block(call);
1028 ir_mode *mode = get_irn_mode(dst);
1029 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
1031 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
1032 replace_call(res, call, mem, NULL, NULL);
1036 } /* i_mapper_mempcpy */
1038 /* A mapper for memmove */
1039 int i_mapper_memmove(ir_node *call, void *ctx)
1041 ir_node *dst = get_Call_param(call, 0);
1042 ir_node *src = get_Call_param(call, 1);
1043 ir_node *len = get_Call_param(call, 2);
1046 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1047 /* a memmove(d, d, len) ==> d OR
1048 a memmove(d, s, 0) ==> d */
1049 ir_node *mem = get_Call_mem(call);
1051 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
1052 replace_call(dst, call, mem, NULL, NULL);
1056 } /* i_mapper_memmove */
1058 /* A mapper for memset */
1059 int i_mapper_memset(ir_node *call, void *ctx)
1061 ir_node *len = get_Call_param(call, 2);
1064 if (is_Const(len) && is_Const_null(len)) {
1065 /* a memset(d, C, 0) ==> d */
1066 ir_node *mem = get_Call_mem(call);
1067 ir_node *dst = get_Call_param(call, 0);
1069 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
1070 replace_call(dst, call, mem, NULL, NULL);
1074 } /* i_mapper_memset */
1076 /* A mapper for memcmp */
1077 int i_mapper_memcmp(ir_node *call, void *ctx)
1079 ir_node *left = get_Call_param(call, 0);
1080 ir_node *right = get_Call_param(call, 1);
1081 ir_node *len = get_Call_param(call, 2);
1085 if (left == right || (is_Const(len) && is_Const_null(len))) {
1086 /* a memcmp(s, s, len) ==> 0 OR
1087 a memcmp(a, b, 0) ==> 0 */
1088 ir_graph *irg = get_irn_irg(call);
1089 ir_node *mem = get_Call_mem(call);
1090 ir_node *adr = get_Call_ptr(call);
1091 ir_entity *ent = get_SymConst_entity(adr);
1092 ir_type *call_tp = get_entity_type(ent);
1093 ir_type *res_tp = get_method_res_type(call_tp, 0);
1094 ir_mode *mode = get_type_mode(res_tp);
1096 irn = new_r_Const(irg, get_mode_null(mode));
1097 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1098 replace_call(irn, call, mem, NULL, NULL);
1102 } /* i_mapper_memcmp */
1105 * Returns the result mode of a node.
1107 static ir_mode *get_irn_res_mode(ir_node *node)
1109 switch (get_irn_opcode(node)) {
1110 case iro_Load: return get_Load_mode(node);
1111 case iro_Div: return get_Div_resmode(node);
1112 case iro_Mod: return get_Mod_resmode(node);
1113 default: return NULL;
1115 } /* get_irn_res_mode */
1117 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
1119 /* A mapper for mapping unsupported instructions to runtime calls. */
1120 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt)
1122 int i, j, arity, first, n_param, n_res;
1125 ir_node *mem, *bl, *call, *addr, *res_proj;
1128 symconst_symbol sym;
1129 ir_mode *mode = get_irn_mode(node);
1131 if (mode != rt->mode)
1133 /* check if the result modes match */
1134 if (mode == mode_T && rt->res_mode != NULL) {
1135 mode = get_irn_res_mode(node);
1136 if (mode != rt->res_mode)
1140 arity = get_irn_arity(node);
1144 mtp = get_entity_type(rt->ent);
1145 n_param = get_method_n_params(mtp);
1146 irg = current_ir_graph;
1148 mem = get_irn_n(node, 0);
1149 if (get_irn_mode(mem) != mode_M) {
1150 mem = new_r_NoMem(irg);
1155 /* check if the modes of the predecessors match the parameter modes */
1156 if (arity - first != n_param)
1159 for (i = first, j = 0; i < arity; ++i, ++j) {
1160 ir_type *param_tp = get_method_param_type(mtp, j);
1161 ir_node *pred = get_irn_n(node, i);
1163 if (get_type_mode(param_tp) != get_irn_mode(pred))
1167 n_res = get_method_n_ress(mtp);
1169 /* step 0: calculate the number of needed Proj's */
1171 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
1172 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1173 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1174 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
1175 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
1178 if (rt->mode != mode_T) /* must be mode_T */
1183 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1187 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1188 bl = get_nodes_block(node);
1192 NEW_ARR_A(ir_node *, in, n_param);
1193 for (i = 0; i < n_param; ++i)
1194 in[i] = get_irn_n(node, first + i);
1197 /* step 1: create the call */
1198 sym.entity_p = rt->ent;
1199 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1200 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1201 set_irn_pinned(call, get_irn_pinned(node));
1204 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1209 n_proj += n_res - 1;
1212 turn_into_tuple(node, n_proj);
1214 if (rt->mem_proj_nr >= 0)
1215 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1216 if (!is_NoMem(mem)) {
1217 /* Exceptions can only be handled with real memory */
1218 if (rt->regular_proj_nr >= 0)
1219 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_regular));
1220 if (rt->exc_proj_nr >= 0)
1221 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_except));
1222 if (rt->exc_mem_proj_nr >= 0)
1223 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1226 if (rt->res_proj_nr >= 0) {
1227 for (i = 0; i < n_res; ++i) {
1228 ir_mode *mode = get_type_mode(get_method_res_type(mtp, i));
1229 ir_node *proj = new_r_Proj(res_proj, mode, i);
1230 set_Tuple_pred(node, rt->res_proj_nr + i, proj);
1235 /* only one return value supported */
1237 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1239 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1240 res_proj = new_r_Proj(res_proj, mode, 0);
1242 exchange(node, res_proj);
1246 /* should not happen */
1248 } /* i_mapper_RuntimeCall */