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_SymConst_addr_ent(symconst))
73 ent = get_SymConst_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 clear_irg_state(irg, IR_GRAPH_STATE_CONSISTENT_DOMINANCE
146 | IR_GRAPH_STATE_VALID_EXTENDED_BLOCKS);
149 irg_verify(irg, VERIFY_NORMAL);
151 nr_of_intrinsics += wenv.nr_of_intrinsics;
156 return nr_of_intrinsics;
157 } /* lower_intrinsics */
159 typedef struct pass_t {
168 * Wrapper for running lower_intrinsics() as an ir_prog pass.
170 static int pass_wrapper(ir_prog *irp, void *context)
172 pass_t *pass = (pass_t*)context;
173 (void) irp; /* TODO: set current irp, or remove parameter */
174 lower_intrinsics(pass->list, pass->length, pass->part_block_used);
175 /* probably this pass should not run again */
180 * Creates an ir_prog pass for lower_intrinsics.
182 * @param name the name of this pass or NULL
183 * @param list an array of intrinsic map records
184 * @param length the length of the array
185 * @param part_block_used set to true if part_block() must be using during lowering
187 ir_prog_pass_t *lower_intrinsics_pass(
189 i_record *list, size_t length, int part_block_used)
191 pass_t *const pass = XMALLOCF(pass_t, list, length);
192 memcpy(pass->list, list, sizeof(list[0]) * length);
193 pass->length = length;
194 pass->part_block_used = part_block_used;
196 return def_prog_pass_constructor(
197 &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
198 } /* lower_intrinsics_pass*/
201 * Helper function, replace the call by the given node.
203 * @param irn the result node
204 * @param call the call to replace
205 * @param mem the new mem result
206 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
207 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
209 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem,
210 ir_node *reg_jmp, ir_node *exc_jmp)
212 ir_node *block = get_nodes_block(call);
213 ir_graph *irg = get_irn_irg(block);
214 ir_node *rest = new_r_Tuple(block, 1, &irn);
216 if (ir_throws_exception(call)) {
217 turn_into_tuple(call, pn_Call_max+1);
218 if (reg_jmp == NULL) {
219 reg_jmp = new_r_Jmp(block);
221 if (exc_jmp == NULL) {
222 exc_jmp = new_r_Bad(irg, mode_X);
224 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
225 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
227 assert(reg_jmp == NULL);
228 assert(exc_jmp == NULL);
229 turn_into_tuple(call, pn_Call_T_result+1);
230 assert(pn_Call_M <= pn_Call_T_result);
231 assert(pn_Call_X_regular > pn_Call_T_result);
232 assert(pn_Call_X_except > pn_Call_T_result);
234 set_Tuple_pred(call, pn_Call_M, mem);
235 set_Tuple_pred(call, pn_Call_T_result, rest);
238 /* A mapper for the integer abs. */
239 int i_mapper_abs(ir_node *call, void *ctx)
241 ir_node *mem = get_Call_mem(call);
242 ir_node *block = get_nodes_block(call);
243 ir_node *op = get_Call_param(call, 0);
244 ir_graph *irg = get_irn_irg(call);
245 ir_mode *mode = get_irn_mode(op);
246 dbg_info *dbg = get_irn_dbg_info(call);
247 ir_node *zero = new_r_Const(irg, get_mode_null(mode));
248 ir_node *cmp = new_rd_Cmp(dbg, block, op, zero, ir_relation_less);
249 ir_node *minus_op = new_rd_Minus(dbg, block, op, mode);
251 arch_allow_ifconv_func allow_ifconv = be_get_backend_param()->allow_ifconv;
254 /* mux allowed by backend? */
255 if (!allow_ifconv(cmp, op, minus_op))
259 mux = new_rd_Mux(dbg, block, cmp, op, minus_op, mode);
260 DBG_OPT_ALGSIM0(call, mux, FS_OPT_RTS_ABS);
261 replace_call(mux, call, mem, NULL, NULL);
265 /* A mapper for the integer bswap. */
266 int i_mapper_bswap(ir_node *call, void *ctx)
268 ir_node *mem = get_Call_mem(call);
269 ir_node *block = get_nodes_block(call);
270 ir_node *op = get_Call_param(call, 0);
271 ir_type *tp = get_Call_type(call);
272 dbg_info *dbg = get_irn_dbg_info(call);
276 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
277 set_irn_pinned(irn, op_pin_state_floats);
278 irn = new_r_Proj(irn, get_irn_mode(op), pn_Builtin_1_result);
279 replace_call(irn, call, mem, NULL, NULL);
281 } /* i_mapper_bswap */
283 /* A mapper for the alloca() function. */
284 int i_mapper_alloca(ir_node *call, void *ctx)
286 ir_node *mem = get_Call_mem(call);
287 ir_node *block = get_nodes_block(call);
288 ir_node *op = get_Call_param(call, 0);
289 ir_node *irn, *exc, *no_exc;
290 dbg_info *dbg = get_irn_dbg_info(call);
293 if (mode_is_signed(get_irn_mode(op))) {
294 ir_mode *mode = get_irn_mode(op);
295 mode = find_unsigned_mode(mode);
297 panic("Cannot find unsigned mode for %M", mode);
299 op = new_rd_Conv(dbg, block, op, mode);
302 irn = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
303 mem = new_rd_Proj(dbg, irn, mode_M, pn_Alloc_M);
304 irn = new_rd_Proj(dbg, irn, get_modeP_data(), pn_Alloc_res);
305 if (ir_throws_exception(call)) {
306 no_exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_regular);
307 exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_except);
308 ir_set_throws_exception(irn, true);
314 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
315 replace_call(irn, call, mem, no_exc, exc);
317 } /* i_mapper_alloca */
319 /* A mapper for the floating point sqrt. */
320 int i_mapper_sqrt(ir_node *call, void *ctx)
324 ir_node *op = get_Call_param(call, 0);
330 tv = get_Const_tarval(op);
331 if (! tarval_is_null(tv) && !tarval_is_one(tv))
334 mem = get_Call_mem(call);
336 /* sqrt(0) = 0, sqrt(1) = 1 */
337 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
338 replace_call(op, call, mem, NULL, NULL);
340 } /* i_mapper_sqrt */
342 /* A mapper for the floating point cbrt. */
343 int i_mapper_cbrt(ir_node *call, void *ctx)
347 ir_node *op = get_Call_param(call, 0);
353 tv = get_Const_tarval(op);
354 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
357 mem = get_Call_mem(call);
359 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
360 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
361 replace_call(op, call, mem, NULL, NULL);
363 } /* i_mapper_cbrt */
365 /* A mapper for the floating point pow. */
366 int i_mapper_pow(ir_node *call, void *ctx)
368 ir_node *left = get_Call_param(call, 0);
369 ir_node *right = get_Call_param(call, 1);
370 ir_node *block = get_nodes_block(call);
371 ir_graph *irg = get_irn_irg(block);
372 ir_node *reg_jmp = NULL;
373 ir_node *exc_jmp = NULL;
379 if (is_Const(left) && is_Const_one(left)) {
380 /* pow (1.0, x) = 1.0 */
382 } else if (is_Const(right)) {
383 ir_tarval *tv = get_Const_tarval(right);
384 if (tarval_is_null(tv)) {
385 /* pow(x, 0.0) = 1.0 */
386 ir_mode *mode = get_tarval_mode(tv);
387 irn = new_r_Const(irg, get_mode_one(mode));
388 } else if (tarval_is_one(tv)) {
389 /* pow(x, 1.0) = x */
391 } else if (tarval_is_minus_one(tv)) {
392 /* pow(x, -1.0) = 1/x */
400 mem = get_Call_mem(call);
401 dbg = get_irn_dbg_info(call);
404 ir_mode *mode = get_irn_mode(left);
407 irn = new_r_Const(irg, get_mode_one(mode));
408 div = new_rd_Div(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
409 mem = new_r_Proj(div, mode_M, pn_Div_M);
410 irn = new_r_Proj(div, mode, pn_Div_res);
411 if (ir_throws_exception(call)) {
412 reg_jmp = new_r_Proj(div, mode_X, pn_Div_X_regular);
413 exc_jmp = new_r_Proj(div, mode_X, pn_Div_X_except);
414 ir_set_throws_exception(div, true);
417 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
418 replace_call(irn, call, mem, reg_jmp, exc_jmp);
422 /* A mapper for the floating point exp. */
423 int i_mapper_exp(ir_node *call, void *ctx)
425 ir_node *val = get_Call_param(call, 0);
428 if (is_Const(val) && is_Const_null(val)) {
430 ir_graph *irg = get_irn_irg(val);
431 ir_mode *mode = get_irn_mode(val);
432 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
433 ir_node *mem = get_Call_mem(call);
434 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
435 replace_call(irn, call, mem, NULL, NULL);
442 * A mapper for mapping f(0.0) to 0.0.
444 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
446 ir_node *val = get_Call_param(call, 0);
449 if (is_Const(val) && is_Const_null(val)) {
451 ir_node *mem = get_Call_mem(call);
452 DBG_OPT_ALGSIM0(call, val, reason);
453 replace_call(val, call, mem, NULL, NULL);
457 } /* i_mapper_zero_to_zero */
460 * A mapper for mapping f(1.0) to 0.0.
462 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
464 ir_node *val = get_Call_param(call, 0);
467 if (is_Const(val) && is_Const_one(val)) {
468 /* acos(1.0) = 0.0 */
469 ir_graph *irg = get_irn_irg(val);
470 ir_mode *mode = get_irn_mode(val);
471 ir_node *irn = new_r_Const(irg, get_mode_null(mode));
472 ir_node *mem = get_Call_mem(call);
473 DBG_OPT_ALGSIM0(call, irn, reason);
474 replace_call(irn, call, mem, NULL, NULL);
478 } /* i_mapper_one_to_zero */
481 * A mapper for mapping a functions with the following characteristics:
485 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
488 ir_node *val = get_Call_param(call, 0);
491 if (is_strictConv(val)) {
492 ir_node *op = get_Conv_op(val);
494 /* f(-x) = f(x) with strictConv */
495 ir_node *block = get_nodes_block(call);
496 ir_mode *mode = get_irn_mode(val);
497 dbg_info *dbg = get_irn_dbg_info(val);
499 op = get_Minus_op(op);
500 val = new_rd_Conv(dbg, block, op, mode);
503 set_Conv_strict(val, 1);
505 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
506 set_Call_param(call, 0, val);
509 } else if (is_Minus(val)) {
511 val = get_Minus_op(val);
512 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
513 set_Call_param(call, 0, val);
517 if (is_Const(val) && is_Const_null(val)) {
519 ir_graph *irg = get_irn_irg(val);
520 ir_mode *mode = get_irn_mode(val);
521 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
522 ir_node *mem = get_Call_mem(call);
523 DBG_OPT_ALGSIM0(call, irn, reason);
524 replace_call(irn, call, mem, NULL, NULL);
528 } /* i_mapper_symmetric_zero_to_one */
530 /* A mapper for the floating point log. */
531 int i_mapper_log(ir_node *call, void *ctx)
534 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
537 /* A mapper for the floating point sin. */
538 int i_mapper_sin(ir_node *call, void *ctx)
541 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
544 /* A mapper for the floating point cos. */
545 int i_mapper_cos(ir_node *call, void *ctx)
547 /* cos(0.0) = 1.0, cos(-x) = x */
548 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
551 /* A mapper for the floating point tan. */
552 int i_mapper_tan(ir_node *call, void *ctx)
555 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
558 /* A mapper for the floating point asin. */
559 int i_mapper_asin(ir_node *call, void *ctx)
561 /* asin(0.0) = 0.0 */
562 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
563 } /* i_mapper_asin */
565 /* A mapper for the floating point acos. */
566 int i_mapper_acos(ir_node *call, void *ctx)
568 /* acos(1.0) = 0.0 */
569 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
570 } /* i_mapper_acos */
572 /* A mapper for the floating point atan. */
573 int i_mapper_atan(ir_node *call, void *ctx)
575 /* atan(0.0) = 0.0 */
576 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
577 } /* i_mapper_atan */
579 /* A mapper for the floating point sinh. */
580 int i_mapper_sinh(ir_node *call, void *ctx)
582 /* sinh(0.0) = 0.0 */
583 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
584 } /* i_mapper_sinh */
586 /* A mapper for the floating point cosh. */
587 int i_mapper_cosh(ir_node *call, void *ctx)
589 /* cosh(0.0) = 1.0, cosh(-x) = x */
590 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
591 } /* i_mapper_cosh */
593 /* A mapper for the floating point tanh. */
594 int i_mapper_tanh(ir_node *call, void *ctx)
596 /* tanh(0.0) = 0.0 */
597 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
598 } /* i_mapper_tanh */
601 * Return the const entity that is accessed through the pointer ptr or
602 * NULL if there is no entity (or the entity is not constant).
604 * @param ptr the pointer
606 static ir_entity *get_const_entity(ir_node *ptr)
608 if (is_SymConst_addr_ent(ptr)) {
609 ir_entity *ent = get_SymConst_entity(ptr);
611 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
612 /* a constant entity */
617 } /* get_const_entity */
619 static bool initializer_val_is_null(ir_initializer_t *init)
623 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
626 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
627 tv = get_initializer_tarval_value(init);
628 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
629 ir_node *irn = get_initializer_const_value(init);
632 tv = get_Const_tarval(irn);
637 return tarval_is_null(tv);
641 * Calculate the value of strlen if possible.
643 * @param ent the entity
644 * @param res_tp the result type
646 * @return a Const node containing the strlen() result or NULL
647 * if the evaluation fails
649 static ir_node *eval_strlen(ir_graph *irg, ir_entity *ent, ir_type *res_tp)
651 ir_type *tp = get_entity_type(ent);
653 ir_initializer_t *initializer;
657 if (! is_Array_type(tp))
659 tp = get_array_element_type(tp);
660 if (! is_Primitive_type(tp))
662 mode = get_type_mode(tp);
664 /* FIXME: This is too restrict, as the type char might be more the 8bits */
665 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
668 if (!has_entity_initializer(ent)) {
671 n = get_compound_ent_n_values(ent);
672 for (i = 0; i < n; ++i) {
673 ir_node *irn = get_compound_ent_value(ent, i);
678 if (is_Const_null(irn)) {
679 /* found the length */
680 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
681 return new_r_Const(irg, tv);
687 initializer = get_entity_initializer(ent);
688 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
691 size = get_initializer_compound_n_entries(initializer);
692 for (i = 0; i < size; ++i) {
693 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
694 if (initializer_val_is_null(val)) {
695 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
696 return new_r_Const(irg, tv);
703 /* A mapper for strlen */
704 int i_mapper_strlen(ir_node *call, void *ctx)
706 ir_node *s = get_Call_param(call, 0);
707 ir_entity *ent = get_const_entity(s);
711 /* FIXME: this cannot handle constant strings inside struct initializers yet */
713 /* a constant entity */
714 ir_type *tp = get_Call_type(call);
717 tp = get_method_res_type(tp, 0);
718 irn = eval_strlen(get_irn_irg(call), ent, tp);
721 ir_node *mem = get_Call_mem(call);
722 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
723 replace_call(irn, call, mem, NULL, NULL);
728 } /* i_mapper_strlen */
731 * Calculate the value of strlen if possible.
733 * @param left the left entity
734 * @param right the right entity
735 * @param res_tp the result type
737 * @return a Const node containing the strcmp() result or NULL
738 * if the evaluation fails
740 static ir_node *eval_strcmp(ir_graph *irg, ir_entity *left, ir_entity *right,
746 tp = get_entity_type(left);
747 if (! is_Array_type(tp))
749 tp = get_array_element_type(tp);
750 if (! is_Primitive_type(tp))
752 mode = get_type_mode(tp);
754 /* FIXME: This is too restrict, as the type char might be more the 8bits */
755 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
758 tp = get_entity_type(right);
759 if (! is_Array_type(tp))
761 tp = get_array_element_type(tp);
762 if (! is_Primitive_type(tp))
764 mode = get_type_mode(tp);
766 /* FIXME: This is too restrict, as the type char might be more the 8bits */
767 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
770 if (!has_entity_initializer(left) && !has_entity_initializer(right)) {
771 /* code that uses deprecated compound_graph_path stuff */
772 size_t n = get_compound_ent_n_values(left);
773 size_t n_r = get_compound_ent_n_values(right);
779 for (i = 0; i < n; ++i) {
784 irn = get_compound_ent_value(left, i);
787 tv = get_Const_tarval(irn);
788 v_l = get_tarval_long(tv);
790 irn = get_compound_ent_value(right, i);
793 tv = get_Const_tarval(irn);
794 v_r = get_tarval_long(tv);
811 /* we found an end */
812 ir_tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
813 return new_r_Const(irg, tv);
824 * Checks if an entity represents the empty string.
826 * @param ent the entity
828 * @return non-zero if ent represents the empty string
830 static int is_empty_string(ir_entity *ent)
832 ir_type *tp = get_entity_type(ent);
835 ir_initializer_t *initializer;
836 ir_initializer_t *init0;
838 if (! is_Array_type(tp))
840 tp = get_array_element_type(tp);
841 if (! is_Primitive_type(tp))
843 mode = get_type_mode(tp);
845 /* FIXME: This is too restrict, as the type char might be more the 8bits */
846 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
849 if (!has_entity_initializer(ent)) {
850 /* code for deprecated compound_graph_path stuff */
851 size_t n = get_compound_ent_n_values(ent);
854 irn = get_compound_ent_value(ent, 0);
856 return is_Const(irn) && is_Const_null(irn);
859 initializer = get_entity_initializer(ent);
860 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
863 if (get_initializer_compound_n_entries(initializer) < 1)
866 init0 = get_initializer_compound_value(initializer, 0);
867 return initializer_val_is_null(init0);
868 } /* is_empty_string */
870 /* A mapper for strcmp */
871 int i_mapper_strcmp(ir_node *call, void *ctx)
873 ir_node *left = get_Call_param(call, 0);
874 ir_node *right = get_Call_param(call, 1);
878 ir_type *call_tp = get_Call_type(call);
879 ir_type *res_tp = get_method_res_type(call_tp, 0);
880 ir_entity *ent_l, *ent_r;
886 /* do some type checks first */
887 if (! is_Primitive_type(res_tp))
889 char_tp = get_method_param_type(call_tp, 0);
890 if (char_tp != get_method_param_type(call_tp, 1))
892 if (! is_Pointer_type(char_tp))
894 char_tp = get_pointer_points_to_type(char_tp);
897 /* a strcmp(s, s) ==> 0 */
898 ir_graph *irg = get_irn_irg(call);
899 ir_node *mem = get_Call_mem(call);
900 ir_mode *mode = get_type_mode(res_tp);
902 irn = new_r_Const(irg, get_mode_null(mode));
903 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
904 replace_call(irn, call, mem, NULL, NULL);
907 ent_l = get_const_entity(left);
908 ent_r = get_const_entity(right);
910 if (ent_l != NULL && ent_r != NULL) {
911 /* both entities are const, try to evaluate */
912 irn = eval_strcmp(get_irn_irg(call), ent_l, ent_r, res_tp);
913 } else if (ent_l != NULL) {
914 if (is_empty_string(ent_l)) {
915 /* s strcmp("", s) ==> -(*s)*/
917 goto replace_by_call;
919 } else if (ent_r != NULL) {
920 if (is_empty_string(ent_r)) {
921 /* s strcmp(s, "") ==> (*s) */
922 ir_node *mem, *block;
928 mem = get_Call_mem(call);
929 block = get_nodes_block(call);
930 dbg = get_irn_dbg_info(call);
931 mode = get_type_mode(char_tp);
933 /* replace the strcmp by (*x) */
934 irn = new_rd_Load(dbg, block, mem, v, mode, cons_none);
935 mem = new_r_Proj(irn, mode_M, pn_Load_M);
936 irn = new_r_Proj(irn, mode, pn_Load_res);
937 if (ir_throws_exception(call)) {
938 exc = new_r_Proj(irn, mode_X, pn_Load_X_except);
939 reg = new_r_Proj(irn, mode_X, pn_Load_X_regular);
940 ir_set_throws_exception(irn, true);
946 /* conv to the result mode */
947 mode = get_type_mode(res_tp);
948 irn = new_rd_Conv(dbg, block, irn, mode);
951 /* negate in the ("", s) case */
952 irn = new_rd_Minus(dbg, block, irn, mode);
958 ir_node *mem = get_Call_mem(call);
959 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
960 replace_call(irn, call, mem, reg, exc);
965 } /* i_mapper_strcmp */
967 /* A mapper for strncmp */
968 int i_mapper_strncmp(ir_node *call, void *ctx)
970 ir_node *left = get_Call_param(call, 0);
971 ir_node *right = get_Call_param(call, 1);
972 ir_node *len = get_Call_param(call, 2);
976 if (left == right || (is_Const(len) && is_Const_null(len))) {
977 /* a strncmp(s, s, len) ==> 0 OR
978 a strncmp(a, b, 0) ==> 0 */
979 ir_graph *irg = get_irn_irg(call);
980 ir_node *mem = get_Call_mem(call);
981 ir_node *adr = get_Call_ptr(call);
982 ir_entity *ent = get_SymConst_entity(adr);
983 ir_type *call_tp = get_entity_type(ent);
984 ir_type *res_tp = get_method_res_type(call_tp, 0);
985 ir_mode *mode = get_type_mode(res_tp);
987 irn = new_r_Const(irg, get_mode_null(mode));
988 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
989 replace_call(irn, call, mem, NULL, NULL);
993 } /* i_mapper_strncmp */
995 /* A mapper for strcpy */
996 int i_mapper_strcpy(ir_node *call, void *ctx)
998 ir_node *dst = get_Call_param(call, 0);
999 ir_node *src = get_Call_param(call, 1);
1003 /* a strcpy(d, s) ==> d */
1004 ir_node *mem = get_Call_mem(call);
1005 ir_node *dst = get_Call_param(call, 0);
1007 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
1008 replace_call(dst, call, mem, NULL, NULL);
1012 } /* i_mapper_strcpy */
1014 /* A mapper for memcpy */
1015 int i_mapper_memcpy(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 OR
1024 a memcpy(d, s, 0) ==> d */
1025 ir_node *mem = get_Call_mem(call);
1027 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
1028 replace_call(dst, call, mem, NULL, NULL);
1032 } /* i_mapper_memcpy */
1034 /* A mapper for mempcpy */
1035 int i_mapper_mempcpy(ir_node *call, void *ctx)
1037 ir_node *dst = get_Call_param(call, 0);
1038 ir_node *src = get_Call_param(call, 1);
1039 ir_node *len = get_Call_param(call, 2);
1042 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1043 /* a memcpy(d, d, len) ==> d + len OR
1044 a memcpy(d, s, 0) ==> d + 0 */
1045 dbg_info *dbg = get_irn_dbg_info(call);
1046 ir_node *mem = get_Call_mem(call);
1047 ir_node *blk = get_nodes_block(call);
1048 ir_mode *mode = get_irn_mode(dst);
1049 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
1051 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
1052 replace_call(res, call, mem, NULL, NULL);
1056 } /* i_mapper_mempcpy */
1058 /* A mapper for memmove */
1059 int i_mapper_memmove(ir_node *call, void *ctx)
1061 ir_node *dst = get_Call_param(call, 0);
1062 ir_node *src = get_Call_param(call, 1);
1063 ir_node *len = get_Call_param(call, 2);
1066 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1067 /* a memmove(d, d, len) ==> d OR
1068 a memmove(d, s, 0) ==> d */
1069 ir_node *mem = get_Call_mem(call);
1071 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
1072 replace_call(dst, call, mem, NULL, NULL);
1076 } /* i_mapper_memmove */
1078 /* A mapper for memset */
1079 int i_mapper_memset(ir_node *call, void *ctx)
1081 ir_node *len = get_Call_param(call, 2);
1084 if (is_Const(len) && is_Const_null(len)) {
1085 /* a memset(d, C, 0) ==> d */
1086 ir_node *mem = get_Call_mem(call);
1087 ir_node *dst = get_Call_param(call, 0);
1089 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
1090 replace_call(dst, call, mem, NULL, NULL);
1094 } /* i_mapper_memset */
1096 /* A mapper for memcmp */
1097 int i_mapper_memcmp(ir_node *call, void *ctx)
1099 ir_node *left = get_Call_param(call, 0);
1100 ir_node *right = get_Call_param(call, 1);
1101 ir_node *len = get_Call_param(call, 2);
1105 if (left == right || (is_Const(len) && is_Const_null(len))) {
1106 /* a memcmp(s, s, len) ==> 0 OR
1107 a memcmp(a, b, 0) ==> 0 */
1108 ir_graph *irg = get_irn_irg(call);
1109 ir_node *mem = get_Call_mem(call);
1110 ir_node *adr = get_Call_ptr(call);
1111 ir_entity *ent = get_SymConst_entity(adr);
1112 ir_type *call_tp = get_entity_type(ent);
1113 ir_type *res_tp = get_method_res_type(call_tp, 0);
1114 ir_mode *mode = get_type_mode(res_tp);
1116 irn = new_r_Const(irg, get_mode_null(mode));
1117 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1118 replace_call(irn, call, mem, NULL, NULL);
1122 } /* i_mapper_memcmp */
1125 * Returns the result mode of a node.
1127 static ir_mode *get_irn_res_mode(ir_node *node)
1129 switch (get_irn_opcode(node)) {
1130 case iro_Load: return get_Load_mode(node);
1131 case iro_Div: return get_Div_resmode(node);
1132 case iro_Mod: return get_Mod_resmode(node);
1133 default: return NULL;
1135 } /* get_irn_res_mode */
1137 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
1139 /* A mapper for mapping unsupported instructions to runtime calls. */
1140 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt)
1142 int i, j, arity, first, n_param, n_res;
1145 ir_node *mem, *bl, *call, *addr, *res_proj;
1147 bool throws_exception;
1150 symconst_symbol sym;
1151 ir_mode *mode = get_irn_mode(node);
1153 if (mode != rt->mode)
1155 /* check if the result modes match */
1156 if (mode == mode_T && rt->res_mode != NULL) {
1157 mode = get_irn_res_mode(node);
1158 if (mode != rt->res_mode)
1162 arity = get_irn_arity(node);
1166 mtp = get_entity_type(rt->ent);
1167 n_param = get_method_n_params(mtp);
1168 irg = current_ir_graph;
1170 mem = get_irn_n(node, 0);
1171 if (get_irn_mode(mem) != mode_M) {
1172 mem = new_r_NoMem(irg);
1177 /* check if the modes of the predecessors match the parameter modes */
1178 if (arity - first != n_param)
1181 for (i = first, j = 0; i < arity; ++i, ++j) {
1182 ir_type *param_tp = get_method_param_type(mtp, j);
1183 ir_node *pred = get_irn_n(node, i);
1185 if (get_type_mode(param_tp) != get_irn_mode(pred))
1189 n_res = get_method_n_ress(mtp);
1190 throws_exception = ir_throws_exception(node);
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->res_proj_nr + 1);
1196 if (throws_exception) {
1197 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1198 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1202 if (rt->mode != mode_T) /* must be mode_T */
1207 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1211 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1212 bl = get_nodes_block(node);
1213 op = get_irn_op(node);
1217 NEW_ARR_A(ir_node *, in, n_param);
1218 for (i = 0; i < n_param; ++i)
1219 in[i] = get_irn_n(node, first + i);
1222 /* step 1: create the call */
1223 sym.entity_p = rt->ent;
1224 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1225 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1226 set_irn_pinned(call, get_irn_pinned(node));
1229 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1234 n_proj += n_res - 1;
1237 turn_into_tuple(node, n_proj);
1239 if (rt->mem_proj_nr >= 0)
1240 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1241 if (throws_exception) {
1242 set_Tuple_pred(node, op->pn_x_regular, new_r_Proj(call, mode_X, pn_Call_X_regular));
1243 set_Tuple_pred(node, op->pn_x_except, new_r_Proj(call, mode_X, pn_Call_X_except));
1246 if (rt->res_proj_nr >= 0) {
1247 for (i = 0; i < n_res; ++i) {
1248 ir_mode *mode = get_type_mode(get_method_res_type(mtp, i));
1249 ir_node *proj = new_r_Proj(res_proj, mode, i);
1250 set_Tuple_pred(node, rt->res_proj_nr + i, proj);
1255 /* only one return value supported */
1257 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1259 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1260 res_proj = new_r_Proj(res_proj, mode, 0);
1262 exchange(node, res_proj);
1266 /* should not happen */
1268 } /* i_mapper_RuntimeCall */