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,
213 ir_node *reg_jmp, ir_node *exc_jmp)
215 ir_node *block = get_nodes_block(call);
216 ir_graph *irg = get_irn_irg(block);
217 ir_node *rest = new_r_Tuple(block, 1, &irn);
219 if (ir_throws_exception(call)) {
220 turn_into_tuple(call, pn_Call_max+1);
221 if (reg_jmp == NULL) {
222 reg_jmp = new_r_Jmp(block);
224 if (exc_jmp == NULL) {
225 exc_jmp = new_r_Bad(irg, mode_X);
227 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
228 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
230 assert(reg_jmp == NULL);
231 assert(exc_jmp == NULL);
232 turn_into_tuple(call, pn_Call_T_result+1);
233 assert(pn_Call_M <= pn_Call_T_result);
234 assert(pn_Call_X_regular > pn_Call_T_result);
235 assert(pn_Call_X_except > pn_Call_T_result);
237 set_Tuple_pred(call, pn_Call_M, mem);
238 set_Tuple_pred(call, pn_Call_T_result, rest);
241 /* A mapper for the integer abs. */
242 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);
247 ir_graph *irg = get_irn_irg(call);
248 ir_mode *mode = get_irn_mode(op);
249 dbg_info *dbg = get_irn_dbg_info(call);
250 ir_node *zero = new_r_Const(irg, get_mode_null(mode));
251 ir_node *cmp = new_rd_Cmp(dbg, block, op, zero, ir_relation_less);
252 ir_node *minus_op = new_rd_Minus(dbg, block, op, mode);
254 arch_allow_ifconv_func allow_ifconv = be_get_backend_param()->allow_ifconv;
257 /* mux allowed by backend? */
258 if (!allow_ifconv(cmp, op, minus_op))
262 mux = new_rd_Mux(dbg, block, cmp, op, minus_op, mode);
263 DBG_OPT_ALGSIM0(call, mux, FS_OPT_RTS_ABS);
264 replace_call(mux, call, mem, NULL, NULL);
268 /* A mapper for the integer bswap. */
269 int i_mapper_bswap(ir_node *call, void *ctx)
271 ir_node *mem = get_Call_mem(call);
272 ir_node *block = get_nodes_block(call);
273 ir_node *op = get_Call_param(call, 0);
274 ir_type *tp = get_Call_type(call);
275 dbg_info *dbg = get_irn_dbg_info(call);
279 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
280 set_irn_pinned(irn, op_pin_state_floats);
281 irn = new_r_Proj(irn, get_irn_mode(op), pn_Builtin_1_result);
282 replace_call(irn, call, mem, NULL, NULL);
284 } /* i_mapper_bswap */
286 /* A mapper for the alloca() function. */
287 int i_mapper_alloca(ir_node *call, void *ctx)
289 ir_node *mem = get_Call_mem(call);
290 ir_node *block = get_nodes_block(call);
291 ir_node *op = get_Call_param(call, 0);
292 ir_node *irn, *exc, *no_exc;
293 dbg_info *dbg = get_irn_dbg_info(call);
296 if (mode_is_signed(get_irn_mode(op))) {
297 ir_mode *mode = get_irn_mode(op);
298 mode = find_unsigned_mode(mode);
300 panic("Cannot find unsigned mode for %M", mode);
302 op = new_rd_Conv(dbg, block, op, mode);
305 irn = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
306 mem = new_rd_Proj(dbg, irn, mode_M, pn_Alloc_M);
307 irn = new_rd_Proj(dbg, irn, get_modeP_data(), pn_Alloc_res);
308 if (ir_throws_exception(call)) {
309 no_exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_regular);
310 exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_except);
311 ir_set_throws_exception(irn, true);
317 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
318 replace_call(irn, call, mem, no_exc, exc);
320 } /* i_mapper_alloca */
322 /* A mapper for the floating point sqrt. */
323 int i_mapper_sqrt(ir_node *call, void *ctx)
327 ir_node *op = get_Call_param(call, 0);
333 tv = get_Const_tarval(op);
334 if (! tarval_is_null(tv) && !tarval_is_one(tv))
337 mem = get_Call_mem(call);
339 /* sqrt(0) = 0, sqrt(1) = 1 */
340 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
341 replace_call(op, call, mem, NULL, NULL);
343 } /* i_mapper_sqrt */
345 /* A mapper for the floating point cbrt. */
346 int i_mapper_cbrt(ir_node *call, void *ctx)
350 ir_node *op = get_Call_param(call, 0);
356 tv = get_Const_tarval(op);
357 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
360 mem = get_Call_mem(call);
362 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
363 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
364 replace_call(op, call, mem, NULL, NULL);
366 } /* i_mapper_cbrt */
368 /* A mapper for the floating point pow. */
369 int i_mapper_pow(ir_node *call, void *ctx)
371 ir_node *left = get_Call_param(call, 0);
372 ir_node *right = get_Call_param(call, 1);
373 ir_node *block = get_nodes_block(call);
374 ir_graph *irg = get_irn_irg(block);
375 ir_node *reg_jmp = NULL;
376 ir_node *exc_jmp = NULL;
382 if (is_Const(left) && is_Const_one(left)) {
383 /* pow (1.0, x) = 1.0 */
385 } else if (is_Const(right)) {
386 ir_tarval *tv = get_Const_tarval(right);
387 if (tarval_is_null(tv)) {
388 /* pow(x, 0.0) = 1.0 */
389 ir_mode *mode = get_tarval_mode(tv);
390 irn = new_r_Const(irg, get_mode_one(mode));
391 } else if (tarval_is_one(tv)) {
392 /* pow(x, 1.0) = x */
394 } else if (tarval_is_minus_one(tv)) {
395 /* pow(x, -1.0) = 1/x */
403 mem = get_Call_mem(call);
404 dbg = get_irn_dbg_info(call);
407 ir_mode *mode = get_irn_mode(left);
410 irn = new_r_Const(irg, get_mode_one(mode));
411 div = new_rd_Div(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
412 mem = new_r_Proj(div, mode_M, pn_Div_M);
413 irn = new_r_Proj(div, mode, pn_Div_res);
414 if (ir_throws_exception(call)) {
415 reg_jmp = new_r_Proj(div, mode_X, pn_Div_X_regular);
416 exc_jmp = new_r_Proj(div, mode_X, pn_Div_X_except);
417 ir_set_throws_exception(div, true);
420 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
421 replace_call(irn, call, mem, reg_jmp, exc_jmp);
425 /* A mapper for the floating point exp. */
426 int i_mapper_exp(ir_node *call, void *ctx)
428 ir_node *val = get_Call_param(call, 0);
431 if (is_Const(val) && is_Const_null(val)) {
433 ir_graph *irg = get_irn_irg(val);
434 ir_mode *mode = get_irn_mode(val);
435 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
436 ir_node *mem = get_Call_mem(call);
437 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
438 replace_call(irn, call, mem, NULL, NULL);
445 * A mapper for mapping f(0.0) to 0.0.
447 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
449 ir_node *val = get_Call_param(call, 0);
452 if (is_Const(val) && is_Const_null(val)) {
454 ir_node *mem = get_Call_mem(call);
455 DBG_OPT_ALGSIM0(call, val, reason);
456 replace_call(val, call, mem, NULL, NULL);
460 } /* i_mapper_zero_to_zero */
463 * A mapper for mapping f(1.0) to 0.0.
465 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
467 ir_node *val = get_Call_param(call, 0);
470 if (is_Const(val) && is_Const_one(val)) {
471 /* acos(1.0) = 0.0 */
472 ir_graph *irg = get_irn_irg(val);
473 ir_mode *mode = get_irn_mode(val);
474 ir_node *irn = new_r_Const(irg, get_mode_null(mode));
475 ir_node *mem = get_Call_mem(call);
476 DBG_OPT_ALGSIM0(call, irn, reason);
477 replace_call(irn, call, mem, NULL, NULL);
481 } /* i_mapper_one_to_zero */
484 * A mapper for mapping a functions with the following characteristics:
488 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
491 ir_node *val = get_Call_param(call, 0);
494 if (is_strictConv(val)) {
495 ir_node *op = get_Conv_op(val);
497 /* f(-x) = f(x) with strictConv */
498 ir_node *block = get_nodes_block(call);
499 ir_mode *mode = get_irn_mode(val);
500 dbg_info *dbg = get_irn_dbg_info(val);
502 op = get_Minus_op(op);
503 val = new_rd_Conv(dbg, block, op, mode);
506 set_Conv_strict(val, 1);
508 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
509 set_Call_param(call, 0, val);
512 } else if (is_Minus(val)) {
514 val = get_Minus_op(val);
515 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
516 set_Call_param(call, 0, val);
520 if (is_Const(val) && is_Const_null(val)) {
522 ir_graph *irg = get_irn_irg(val);
523 ir_mode *mode = get_irn_mode(val);
524 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
525 ir_node *mem = get_Call_mem(call);
526 DBG_OPT_ALGSIM0(call, irn, reason);
527 replace_call(irn, call, mem, NULL, NULL);
531 } /* i_mapper_symmetric_zero_to_one */
533 /* A mapper for the floating point log. */
534 int i_mapper_log(ir_node *call, void *ctx)
537 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
540 /* A mapper for the floating point sin. */
541 int i_mapper_sin(ir_node *call, void *ctx)
544 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
547 /* A mapper for the floating point cos. */
548 int i_mapper_cos(ir_node *call, void *ctx)
550 /* cos(0.0) = 1.0, cos(-x) = x */
551 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
554 /* A mapper for the floating point tan. */
555 int i_mapper_tan(ir_node *call, void *ctx)
558 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
561 /* A mapper for the floating point asin. */
562 int i_mapper_asin(ir_node *call, void *ctx)
564 /* asin(0.0) = 0.0 */
565 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
566 } /* i_mapper_asin */
568 /* A mapper for the floating point acos. */
569 int i_mapper_acos(ir_node *call, void *ctx)
571 /* acos(1.0) = 0.0 */
572 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
573 } /* i_mapper_acos */
575 /* A mapper for the floating point atan. */
576 int i_mapper_atan(ir_node *call, void *ctx)
578 /* atan(0.0) = 0.0 */
579 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
580 } /* i_mapper_atan */
582 /* A mapper for the floating point sinh. */
583 int i_mapper_sinh(ir_node *call, void *ctx)
585 /* sinh(0.0) = 0.0 */
586 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
587 } /* i_mapper_sinh */
589 /* A mapper for the floating point cosh. */
590 int i_mapper_cosh(ir_node *call, void *ctx)
592 /* cosh(0.0) = 1.0, cosh(-x) = x */
593 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
594 } /* i_mapper_cosh */
596 /* A mapper for the floating point tanh. */
597 int i_mapper_tanh(ir_node *call, void *ctx)
599 /* tanh(0.0) = 0.0 */
600 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
601 } /* i_mapper_tanh */
604 * Return the const entity that is accessed through the pointer ptr or
605 * NULL if there is no entity (or the entity is not constant).
607 * @param ptr the pointer
609 static ir_entity *get_const_entity(ir_node *ptr)
611 if (is_Global(ptr)) {
612 ir_entity *ent = get_Global_entity(ptr);
614 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
615 /* a constant entity */
620 } /* get_const_entity */
622 static bool initializer_val_is_null(ir_initializer_t *init)
626 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
629 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
630 tv = get_initializer_tarval_value(init);
631 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
632 ir_node *irn = get_initializer_const_value(init);
635 tv = get_Const_tarval(irn);
640 return tarval_is_null(tv);
644 * Calculate the value of strlen if possible.
646 * @param ent the entity
647 * @param res_tp the result type
649 * @return a Const node containing the strlen() result or NULL
650 * if the evaluation fails
652 static ir_node *eval_strlen(ir_graph *irg, ir_entity *ent, ir_type *res_tp)
654 ir_type *tp = get_entity_type(ent);
656 ir_initializer_t *initializer;
660 if (! is_Array_type(tp))
662 tp = get_array_element_type(tp);
663 if (! is_Primitive_type(tp))
665 mode = get_type_mode(tp);
667 /* FIXME: This is too restrict, as the type char might be more the 8bits */
668 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
671 if (!has_entity_initializer(ent)) {
674 n = get_compound_ent_n_values(ent);
675 for (i = 0; i < n; ++i) {
676 ir_node *irn = get_compound_ent_value(ent, i);
681 if (is_Const_null(irn)) {
682 /* found the length */
683 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
684 return new_r_Const(irg, tv);
690 initializer = get_entity_initializer(ent);
691 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
694 size = get_initializer_compound_n_entries(initializer);
695 for (i = 0; i < size; ++i) {
696 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
697 if (initializer_val_is_null(val)) {
698 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
699 return new_r_Const(irg, tv);
706 /* A mapper for strlen */
707 int i_mapper_strlen(ir_node *call, void *ctx)
709 ir_node *s = get_Call_param(call, 0);
710 ir_entity *ent = get_const_entity(s);
714 /* FIXME: this cannot handle constant strings inside struct initializers yet */
716 /* a constant entity */
717 ir_type *tp = get_Call_type(call);
720 tp = get_method_res_type(tp, 0);
721 irn = eval_strlen(get_irn_irg(call), ent, tp);
724 ir_node *mem = get_Call_mem(call);
725 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
726 replace_call(irn, call, mem, NULL, NULL);
731 } /* i_mapper_strlen */
734 * Calculate the value of strlen if possible.
736 * @param left the left entity
737 * @param right the right entity
738 * @param res_tp the result type
740 * @return a Const node containing the strcmp() result or NULL
741 * if the evaluation fails
743 static ir_node *eval_strcmp(ir_graph *irg, ir_entity *left, ir_entity *right,
749 tp = get_entity_type(left);
750 if (! is_Array_type(tp))
752 tp = get_array_element_type(tp);
753 if (! is_Primitive_type(tp))
755 mode = get_type_mode(tp);
757 /* FIXME: This is too restrict, as the type char might be more the 8bits */
758 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
761 tp = get_entity_type(right);
762 if (! is_Array_type(tp))
764 tp = get_array_element_type(tp);
765 if (! is_Primitive_type(tp))
767 mode = get_type_mode(tp);
769 /* FIXME: This is too restrict, as the type char might be more the 8bits */
770 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
773 if (!has_entity_initializer(left) && !has_entity_initializer(right)) {
774 /* code that uses deprecated compound_graph_path stuff */
775 size_t n = get_compound_ent_n_values(left);
776 size_t n_r = get_compound_ent_n_values(right);
782 for (i = 0; i < n; ++i) {
787 irn = get_compound_ent_value(left, i);
790 tv = get_Const_tarval(irn);
791 v_l = get_tarval_long(tv);
793 irn = get_compound_ent_value(right, i);
796 tv = get_Const_tarval(irn);
797 v_r = get_tarval_long(tv);
814 /* we found an end */
815 ir_tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
816 return new_r_Const(irg, tv);
827 * Checks if an entity represents the empty string.
829 * @param ent the entity
831 * @return non-zero if ent represents the empty string
833 static int is_empty_string(ir_entity *ent)
835 ir_type *tp = get_entity_type(ent);
838 ir_initializer_t *initializer;
839 ir_initializer_t *init0;
841 if (! is_Array_type(tp))
843 tp = get_array_element_type(tp);
844 if (! is_Primitive_type(tp))
846 mode = get_type_mode(tp);
848 /* FIXME: This is too restrict, as the type char might be more the 8bits */
849 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
852 if (!has_entity_initializer(ent)) {
853 /* code for deprecated compound_graph_path stuff */
854 size_t n = get_compound_ent_n_values(ent);
857 irn = get_compound_ent_value(ent, 0);
859 return is_Const(irn) && is_Const_null(irn);
862 initializer = get_entity_initializer(ent);
863 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
866 if (get_initializer_compound_n_entries(initializer) < 1)
869 init0 = get_initializer_compound_value(initializer, 0);
870 return initializer_val_is_null(init0);
871 } /* is_empty_string */
873 /* A mapper for strcmp */
874 int i_mapper_strcmp(ir_node *call, void *ctx)
876 ir_node *left = get_Call_param(call, 0);
877 ir_node *right = get_Call_param(call, 1);
881 ir_type *call_tp = get_Call_type(call);
882 ir_type *res_tp = get_method_res_type(call_tp, 0);
883 ir_entity *ent_l, *ent_r;
889 /* do some type checks first */
890 if (! is_Primitive_type(res_tp))
892 char_tp = get_method_param_type(call_tp, 0);
893 if (char_tp != get_method_param_type(call_tp, 1))
895 if (! is_Pointer_type(char_tp))
897 char_tp = get_pointer_points_to_type(char_tp);
900 /* a strcmp(s, s) ==> 0 */
901 ir_graph *irg = get_irn_irg(call);
902 ir_node *mem = get_Call_mem(call);
903 ir_mode *mode = get_type_mode(res_tp);
905 irn = new_r_Const(irg, get_mode_null(mode));
906 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
907 replace_call(irn, call, mem, NULL, NULL);
910 ent_l = get_const_entity(left);
911 ent_r = get_const_entity(right);
913 if (ent_l != NULL && ent_r != NULL) {
914 /* both entities are const, try to evaluate */
915 irn = eval_strcmp(get_irn_irg(call), ent_l, ent_r, res_tp);
916 } else if (ent_l != NULL) {
917 if (is_empty_string(ent_l)) {
918 /* s strcmp("", s) ==> -(*s)*/
920 goto replace_by_call;
922 } else if (ent_r != NULL) {
923 if (is_empty_string(ent_r)) {
924 /* s strcmp(s, "") ==> (*s) */
925 ir_node *mem, *block;
931 mem = get_Call_mem(call);
932 block = get_nodes_block(call);
933 dbg = get_irn_dbg_info(call);
934 mode = get_type_mode(char_tp);
936 /* replace the strcmp by (*x) */
937 irn = new_rd_Load(dbg, block, mem, v, mode, cons_none);
938 mem = new_r_Proj(irn, mode_M, pn_Load_M);
939 irn = new_r_Proj(irn, mode, pn_Load_res);
940 if (ir_throws_exception(call)) {
941 exc = new_r_Proj(irn, mode_X, pn_Load_X_except);
942 reg = new_r_Proj(irn, mode_X, pn_Load_X_regular);
943 ir_set_throws_exception(irn, true);
949 /* conv to the result mode */
950 mode = get_type_mode(res_tp);
951 irn = new_rd_Conv(dbg, block, irn, mode);
954 /* negate in the ("", s) case */
955 irn = new_rd_Minus(dbg, block, irn, mode);
961 ir_node *mem = get_Call_mem(call);
962 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
963 replace_call(irn, call, mem, reg, exc);
968 } /* i_mapper_strcmp */
970 /* A mapper for strncmp */
971 int i_mapper_strncmp(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 strncmp(s, s, len) ==> 0 OR
981 a strncmp(a, b, 0) ==> 0 */
982 ir_graph *irg = get_irn_irg(call);
983 ir_node *mem = get_Call_mem(call);
984 ir_node *adr = get_Call_ptr(call);
985 ir_entity *ent = get_SymConst_entity(adr);
986 ir_type *call_tp = get_entity_type(ent);
987 ir_type *res_tp = get_method_res_type(call_tp, 0);
988 ir_mode *mode = get_type_mode(res_tp);
990 irn = new_r_Const(irg, get_mode_null(mode));
991 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
992 replace_call(irn, call, mem, NULL, NULL);
996 } /* i_mapper_strncmp */
998 /* A mapper for strcpy */
999 int i_mapper_strcpy(ir_node *call, void *ctx)
1001 ir_node *dst = get_Call_param(call, 0);
1002 ir_node *src = get_Call_param(call, 1);
1006 /* a strcpy(d, s) ==> d */
1007 ir_node *mem = get_Call_mem(call);
1008 ir_node *dst = get_Call_param(call, 0);
1010 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
1011 replace_call(dst, call, mem, NULL, NULL);
1015 } /* i_mapper_strcpy */
1017 /* A mapper for memcpy */
1018 int i_mapper_memcpy(ir_node *call, void *ctx)
1020 ir_node *dst = get_Call_param(call, 0);
1021 ir_node *src = get_Call_param(call, 1);
1022 ir_node *len = get_Call_param(call, 2);
1025 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1026 /* a memcpy(d, d, len) ==> d OR
1027 a memcpy(d, s, 0) ==> d */
1028 ir_node *mem = get_Call_mem(call);
1030 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
1031 replace_call(dst, call, mem, NULL, NULL);
1035 } /* i_mapper_memcpy */
1037 /* A mapper for mempcpy */
1038 int i_mapper_mempcpy(ir_node *call, void *ctx)
1040 ir_node *dst = get_Call_param(call, 0);
1041 ir_node *src = get_Call_param(call, 1);
1042 ir_node *len = get_Call_param(call, 2);
1045 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1046 /* a memcpy(d, d, len) ==> d + len OR
1047 a memcpy(d, s, 0) ==> d + 0 */
1048 dbg_info *dbg = get_irn_dbg_info(call);
1049 ir_node *mem = get_Call_mem(call);
1050 ir_node *blk = get_nodes_block(call);
1051 ir_mode *mode = get_irn_mode(dst);
1052 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
1054 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
1055 replace_call(res, call, mem, NULL, NULL);
1059 } /* i_mapper_mempcpy */
1061 /* A mapper for memmove */
1062 int i_mapper_memmove(ir_node *call, void *ctx)
1064 ir_node *dst = get_Call_param(call, 0);
1065 ir_node *src = get_Call_param(call, 1);
1066 ir_node *len = get_Call_param(call, 2);
1069 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1070 /* a memmove(d, d, len) ==> d OR
1071 a memmove(d, s, 0) ==> d */
1072 ir_node *mem = get_Call_mem(call);
1074 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
1075 replace_call(dst, call, mem, NULL, NULL);
1079 } /* i_mapper_memmove */
1081 /* A mapper for memset */
1082 int i_mapper_memset(ir_node *call, void *ctx)
1084 ir_node *len = get_Call_param(call, 2);
1087 if (is_Const(len) && is_Const_null(len)) {
1088 /* a memset(d, C, 0) ==> d */
1089 ir_node *mem = get_Call_mem(call);
1090 ir_node *dst = get_Call_param(call, 0);
1092 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
1093 replace_call(dst, call, mem, NULL, NULL);
1097 } /* i_mapper_memset */
1099 /* A mapper for memcmp */
1100 int i_mapper_memcmp(ir_node *call, void *ctx)
1102 ir_node *left = get_Call_param(call, 0);
1103 ir_node *right = get_Call_param(call, 1);
1104 ir_node *len = get_Call_param(call, 2);
1108 if (left == right || (is_Const(len) && is_Const_null(len))) {
1109 /* a memcmp(s, s, len) ==> 0 OR
1110 a memcmp(a, b, 0) ==> 0 */
1111 ir_graph *irg = get_irn_irg(call);
1112 ir_node *mem = get_Call_mem(call);
1113 ir_node *adr = get_Call_ptr(call);
1114 ir_entity *ent = get_SymConst_entity(adr);
1115 ir_type *call_tp = get_entity_type(ent);
1116 ir_type *res_tp = get_method_res_type(call_tp, 0);
1117 ir_mode *mode = get_type_mode(res_tp);
1119 irn = new_r_Const(irg, get_mode_null(mode));
1120 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1121 replace_call(irn, call, mem, NULL, NULL);
1125 } /* i_mapper_memcmp */
1128 * Returns the result mode of a node.
1130 static ir_mode *get_irn_res_mode(ir_node *node)
1132 switch (get_irn_opcode(node)) {
1133 case iro_Load: return get_Load_mode(node);
1134 case iro_Div: return get_Div_resmode(node);
1135 case iro_Mod: return get_Mod_resmode(node);
1136 default: return NULL;
1138 } /* get_irn_res_mode */
1140 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
1142 /* A mapper for mapping unsupported instructions to runtime calls. */
1143 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt)
1145 int i, j, arity, first, n_param, n_res;
1148 ir_node *mem, *bl, *call, *addr, *res_proj;
1151 symconst_symbol sym;
1152 ir_mode *mode = get_irn_mode(node);
1154 if (mode != rt->mode)
1156 /* check if the result modes match */
1157 if (mode == mode_T && rt->res_mode != NULL) {
1158 mode = get_irn_res_mode(node);
1159 if (mode != rt->res_mode)
1163 arity = get_irn_arity(node);
1167 mtp = get_entity_type(rt->ent);
1168 n_param = get_method_n_params(mtp);
1169 irg = current_ir_graph;
1171 mem = get_irn_n(node, 0);
1172 if (get_irn_mode(mem) != mode_M) {
1173 mem = new_r_NoMem(irg);
1178 /* check if the modes of the predecessors match the parameter modes */
1179 if (arity - first != n_param)
1182 for (i = first, j = 0; i < arity; ++i, ++j) {
1183 ir_type *param_tp = get_method_param_type(mtp, j);
1184 ir_node *pred = get_irn_n(node, i);
1186 if (get_type_mode(param_tp) != get_irn_mode(pred))
1190 n_res = get_method_n_ress(mtp);
1192 /* step 0: calculate the number of needed Proj's */
1194 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
1195 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1196 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1197 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
1198 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
1201 if (rt->mode != mode_T) /* must be mode_T */
1206 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1210 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1211 bl = get_nodes_block(node);
1215 NEW_ARR_A(ir_node *, in, n_param);
1216 for (i = 0; i < n_param; ++i)
1217 in[i] = get_irn_n(node, first + i);
1220 /* step 1: create the call */
1221 sym.entity_p = rt->ent;
1222 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1223 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1224 set_irn_pinned(call, get_irn_pinned(node));
1227 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1232 n_proj += n_res - 1;
1235 turn_into_tuple(node, n_proj);
1237 if (rt->mem_proj_nr >= 0)
1238 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1239 if (!is_NoMem(mem)) {
1240 /* Exceptions can only be handled with real memory */
1241 if (rt->regular_proj_nr >= 0)
1242 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_regular));
1243 if (rt->exc_proj_nr >= 0)
1244 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_except));
1245 if (rt->exc_mem_proj_nr >= 0)
1246 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1249 if (rt->res_proj_nr >= 0) {
1250 for (i = 0; i < n_res; ++i) {
1251 ir_mode *mode = get_type_mode(get_method_res_type(mtp, i));
1252 ir_node *proj = new_r_Proj(res_proj, mode, i);
1253 set_Tuple_pred(node, rt->res_proj_nr + i, proj);
1258 /* only one return value supported */
1260 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1262 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1263 res_proj = new_r_Proj(res_proj, mode, 0);
1265 exchange(node, res_proj);
1269 /* should not happen */
1271 } /* i_mapper_RuntimeCall */