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 *pass = (pass_t*)xmalloc(sizeof(*pass) + (length-1) * sizeof(pass->list[0]));
196 memcpy(pass->list, list, sizeof(list[0]) * length);
197 pass->length = length;
198 pass->part_block_used = part_block_used;
200 return def_prog_pass_constructor(
201 &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
202 } /* lower_intrinsics_pass*/
205 * Helper function, replace the call by the given node.
207 * @param irn the result node
208 * @param call the call to replace
209 * @param mem the new mem result
210 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
211 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
213 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp)
215 ir_node *block = get_nodes_block(call);
216 ir_graph *irg = get_irn_irg(block);
218 if (reg_jmp == NULL) {
220 /* Beware: do we need here a protection against CSE? Better we do it. */
221 int old_cse = get_opt_cse();
223 reg_jmp = new_r_Jmp(block);
224 set_opt_cse(old_cse);
225 exc_jmp = new_r_Bad(irg, mode_X);
227 irn = new_r_Tuple(block, 1, &irn);
229 turn_into_tuple(call, pn_Call_max);
230 set_Tuple_pred(call, pn_Call_M, mem);
231 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
232 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
233 set_Tuple_pred(call, pn_Call_T_result, irn);
236 /* A mapper for the integer abs. */
237 int i_mapper_abs(ir_node *call, void *ctx)
239 ir_node *mem = get_Call_mem(call);
240 ir_node *block = get_nodes_block(call);
241 ir_node *op = get_Call_param(call, 0);
242 ir_graph *irg = get_irn_irg(call);
243 ir_mode *mode = get_irn_mode(op);
244 dbg_info *dbg = get_irn_dbg_info(call);
245 ir_node *zero = new_r_Const(irg, get_mode_null(mode));
246 ir_node *cmp = new_rd_Cmp(dbg, block, op, zero, ir_relation_less);
247 ir_node *minus_op = new_rd_Minus(dbg, block, op, mode);
249 arch_allow_ifconv_func allow_ifconv = be_get_backend_param()->allow_ifconv;
252 /* mux allowed by backend? */
253 if (!allow_ifconv(cmp, op, minus_op))
257 mux = new_rd_Mux(dbg, block, cmp, op, minus_op, mode);
258 DBG_OPT_ALGSIM0(call, mux, FS_OPT_RTS_ABS);
259 replace_call(mux, call, mem, NULL, NULL);
263 /* A mapper for the integer bswap. */
264 int i_mapper_bswap(ir_node *call, void *ctx)
266 ir_node *mem = get_Call_mem(call);
267 ir_node *block = get_nodes_block(call);
268 ir_node *op = get_Call_param(call, 0);
269 ir_type *tp = get_Call_type(call);
270 dbg_info *dbg = get_irn_dbg_info(call);
274 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
275 set_irn_pinned(irn, op_pin_state_floats);
276 irn = new_r_Proj(irn, get_irn_mode(op), pn_Builtin_1_result);
277 replace_call(irn, call, mem, NULL, NULL);
279 } /* i_mapper_bswap */
281 /* A mapper for the alloca() function. */
282 int i_mapper_alloca(ir_node *call, void *ctx)
284 ir_node *mem = get_Call_mem(call);
285 ir_node *block = get_nodes_block(call);
286 ir_node *op = get_Call_param(call, 0);
287 ir_node *irn, *exc, *no_exc;
288 dbg_info *dbg = get_irn_dbg_info(call);
291 if (mode_is_signed(get_irn_mode(op))) {
292 ir_mode *mode = get_irn_mode(op);
293 mode = find_unsigned_mode(mode);
295 panic("Cannot find unsigned mode for %M", mode);
297 op = new_rd_Conv(dbg, block, op, mode);
300 irn = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
301 mem = new_rd_Proj(dbg, irn, mode_M, pn_Alloc_M);
302 no_exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_regular);
303 exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_except);
304 irn = new_rd_Proj(dbg, irn, get_modeP_data(), pn_Alloc_res);
306 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
307 replace_call(irn, call, mem, no_exc, exc);
309 } /* i_mapper_alloca */
311 /* A mapper for the floating point sqrt. */
312 int i_mapper_sqrt(ir_node *call, void *ctx)
316 ir_node *op = get_Call_param(call, 0);
322 tv = get_Const_tarval(op);
323 if (! tarval_is_null(tv) && !tarval_is_one(tv))
326 mem = get_Call_mem(call);
328 /* sqrt(0) = 0, sqrt(1) = 1 */
329 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
330 replace_call(op, call, mem, NULL, NULL);
332 } /* i_mapper_sqrt */
334 /* A mapper for the floating point cbrt. */
335 int i_mapper_cbrt(ir_node *call, void *ctx)
339 ir_node *op = get_Call_param(call, 0);
345 tv = get_Const_tarval(op);
346 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
349 mem = get_Call_mem(call);
351 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
352 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
353 replace_call(op, call, mem, NULL, NULL);
355 } /* i_mapper_cbrt */
357 /* A mapper for the floating point pow. */
358 int i_mapper_pow(ir_node *call, void *ctx)
362 ir_node *left = get_Call_param(call, 0);
363 ir_node *right = get_Call_param(call, 1);
364 ir_node *block = get_nodes_block(call);
365 ir_graph *irg = get_irn_irg(block);
366 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
369 if (is_Const(left) && is_Const_one(left)) {
370 /* pow (1.0, x) = 1.0 */
372 } else if (is_Const(right)) {
373 ir_tarval *tv = get_Const_tarval(right);
374 if (tarval_is_null(tv)) {
375 /* pow(x, 0.0) = 1.0 */
376 ir_mode *mode = get_tarval_mode(tv);
377 irn = new_r_Const(irg, get_mode_one(mode));
378 } else if (tarval_is_one(tv)) {
379 /* pow(x, 1.0) = x */
381 } else if (tarval_is_minus_one(tv)) {
382 /* pow(x, -1.0) = 1/x */
390 mem = get_Call_mem(call);
391 dbg = get_irn_dbg_info(call);
394 ir_mode *mode = get_irn_mode(left);
397 irn = new_r_Const(irg, get_mode_one(mode));
398 div = new_rd_Div(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
399 mem = new_r_Proj(div, mode_M, pn_Div_M);
400 irn = new_r_Proj(div, mode, pn_Div_res);
401 reg_jmp = new_r_Proj(div, mode_X, pn_Div_X_regular);
402 exc_jmp = new_r_Proj(div, mode_X, pn_Div_X_except);
404 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
405 replace_call(irn, call, mem, reg_jmp, exc_jmp);
409 /* A mapper for the floating point exp. */
410 int i_mapper_exp(ir_node *call, void *ctx)
412 ir_node *val = get_Call_param(call, 0);
415 if (is_Const(val) && is_Const_null(val)) {
417 ir_graph *irg = get_irn_irg(val);
418 ir_mode *mode = get_irn_mode(val);
419 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
420 ir_node *mem = get_Call_mem(call);
421 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
422 replace_call(irn, call, mem, NULL, NULL);
429 * A mapper for mapping f(0.0) to 0.0.
431 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
433 ir_node *val = get_Call_param(call, 0);
436 if (is_Const(val) && is_Const_null(val)) {
438 ir_node *mem = get_Call_mem(call);
439 DBG_OPT_ALGSIM0(call, val, reason);
440 replace_call(val, call, mem, NULL, NULL);
444 } /* i_mapper_zero_to_zero */
447 * A mapper for mapping f(1.0) to 0.0.
449 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
451 ir_node *val = get_Call_param(call, 0);
454 if (is_Const(val) && is_Const_one(val)) {
455 /* acos(1.0) = 0.0 */
456 ir_graph *irg = get_irn_irg(val);
457 ir_mode *mode = get_irn_mode(val);
458 ir_node *irn = new_r_Const(irg, get_mode_null(mode));
459 ir_node *mem = get_Call_mem(call);
460 DBG_OPT_ALGSIM0(call, irn, reason);
461 replace_call(irn, call, mem, NULL, NULL);
465 } /* i_mapper_one_to_zero */
468 * A mapper for mapping a functions with the following characteristics:
472 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
475 ir_node *val = get_Call_param(call, 0);
478 if (is_strictConv(val)) {
479 ir_node *op = get_Conv_op(val);
481 /* f(-x) = f(x) with strictConv */
482 ir_node *block = get_nodes_block(call);
483 ir_mode *mode = get_irn_mode(val);
484 dbg_info *dbg = get_irn_dbg_info(val);
486 op = get_Minus_op(op);
487 val = new_rd_Conv(dbg, block, op, mode);
490 set_Conv_strict(val, 1);
492 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
493 set_Call_param(call, 0, val);
496 } else if (is_Minus(val)) {
498 val = get_Minus_op(val);
499 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
500 set_Call_param(call, 0, val);
504 if (is_Const(val) && is_Const_null(val)) {
506 ir_graph *irg = get_irn_irg(val);
507 ir_mode *mode = get_irn_mode(val);
508 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
509 ir_node *mem = get_Call_mem(call);
510 DBG_OPT_ALGSIM0(call, irn, reason);
511 replace_call(irn, call, mem, NULL, NULL);
515 } /* i_mapper_symmetric_zero_to_one */
517 /* A mapper for the floating point log. */
518 int i_mapper_log(ir_node *call, void *ctx)
521 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
524 /* A mapper for the floating point sin. */
525 int i_mapper_sin(ir_node *call, void *ctx)
528 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
531 /* A mapper for the floating point cos. */
532 int i_mapper_cos(ir_node *call, void *ctx)
534 /* cos(0.0) = 1.0, cos(-x) = x */
535 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
538 /* A mapper for the floating point tan. */
539 int i_mapper_tan(ir_node *call, void *ctx)
542 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
545 /* A mapper for the floating point asin. */
546 int i_mapper_asin(ir_node *call, void *ctx)
548 /* asin(0.0) = 0.0 */
549 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
550 } /* i_mapper_asin */
552 /* A mapper for the floating point acos. */
553 int i_mapper_acos(ir_node *call, void *ctx)
555 /* acos(1.0) = 0.0 */
556 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
557 } /* i_mapper_acos */
559 /* A mapper for the floating point atan. */
560 int i_mapper_atan(ir_node *call, void *ctx)
562 /* atan(0.0) = 0.0 */
563 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
564 } /* i_mapper_atan */
566 /* A mapper for the floating point sinh. */
567 int i_mapper_sinh(ir_node *call, void *ctx)
569 /* sinh(0.0) = 0.0 */
570 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
571 } /* i_mapper_sinh */
573 /* A mapper for the floating point cosh. */
574 int i_mapper_cosh(ir_node *call, void *ctx)
576 /* cosh(0.0) = 1.0, cosh(-x) = x */
577 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
578 } /* i_mapper_cosh */
580 /* A mapper for the floating point tanh. */
581 int i_mapper_tanh(ir_node *call, void *ctx)
583 /* tanh(0.0) = 0.0 */
584 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
585 } /* i_mapper_tanh */
588 * Return the const entity that is accessed through the pointer ptr or
589 * NULL if there is no entity (or the entity is not constant).
591 * @param ptr the pointer
593 static ir_entity *get_const_entity(ir_node *ptr)
595 if (is_Global(ptr)) {
596 ir_entity *ent = get_Global_entity(ptr);
598 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
599 /* a constant entity */
604 } /* get_const_entity */
606 static bool initializer_val_is_null(ir_initializer_t *init)
610 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
613 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
614 tv = get_initializer_tarval_value(init);
615 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
616 ir_node *irn = get_initializer_const_value(init);
619 tv = get_Const_tarval(irn);
624 return tarval_is_null(tv);
628 * Calculate the value of strlen if possible.
630 * @param ent the entity
631 * @param res_tp the result type
633 * @return a Const node containing the strlen() result or NULL
634 * if the evaluation fails
636 static ir_node *eval_strlen(ir_graph *irg, ir_entity *ent, ir_type *res_tp)
638 ir_type *tp = get_entity_type(ent);
640 ir_initializer_t *initializer;
644 if (! is_Array_type(tp))
646 tp = get_array_element_type(tp);
647 if (! is_Primitive_type(tp))
649 mode = get_type_mode(tp);
651 /* FIXME: This is too restrict, as the type char might be more the 8bits */
652 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
655 if (!has_entity_initializer(ent)) {
658 n = get_compound_ent_n_values(ent);
659 for (i = 0; i < n; ++i) {
660 ir_node *irn = get_compound_ent_value(ent, i);
665 if (is_Const_null(irn)) {
666 /* found the length */
667 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
668 return new_r_Const(irg, tv);
674 initializer = get_entity_initializer(ent);
675 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
678 size = get_initializer_compound_n_entries(initializer);
679 for (i = 0; i < size; ++i) {
680 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
681 if (initializer_val_is_null(val)) {
682 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
683 return new_r_Const(irg, tv);
690 /* A mapper for strlen */
691 int i_mapper_strlen(ir_node *call, void *ctx)
693 ir_node *s = get_Call_param(call, 0);
694 ir_entity *ent = get_const_entity(s);
698 /* FIXME: this cannot handle constant strings inside struct initializers yet */
700 /* a constant entity */
701 ir_type *tp = get_Call_type(call);
704 tp = get_method_res_type(tp, 0);
705 irn = eval_strlen(get_irn_irg(call), ent, tp);
708 ir_node *mem = get_Call_mem(call);
709 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
710 replace_call(irn, call, mem, NULL, NULL);
715 } /* i_mapper_strlen */
718 * Calculate the value of strlen if possible.
720 * @param left the left entity
721 * @param right the right entity
722 * @param res_tp the result type
724 * @return a Const node containing the strcmp() result or NULL
725 * if the evaluation fails
727 static ir_node *eval_strcmp(ir_graph *irg, ir_entity *left, ir_entity *right,
733 tp = get_entity_type(left);
734 if (! is_Array_type(tp))
736 tp = get_array_element_type(tp);
737 if (! is_Primitive_type(tp))
739 mode = get_type_mode(tp);
741 /* FIXME: This is too restrict, as the type char might be more the 8bits */
742 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
745 tp = get_entity_type(right);
746 if (! is_Array_type(tp))
748 tp = get_array_element_type(tp);
749 if (! is_Primitive_type(tp))
751 mode = get_type_mode(tp);
753 /* FIXME: This is too restrict, as the type char might be more the 8bits */
754 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
757 if (!has_entity_initializer(left) && !has_entity_initializer(right)) {
758 /* code that uses deprecated compound_graph_path stuff */
759 size_t n = get_compound_ent_n_values(left);
760 size_t n_r = get_compound_ent_n_values(right);
766 for (i = 0; i < n; ++i) {
771 irn = get_compound_ent_value(left, i);
774 tv = get_Const_tarval(irn);
775 v_l = get_tarval_long(tv);
777 irn = get_compound_ent_value(right, i);
780 tv = get_Const_tarval(irn);
781 v_r = get_tarval_long(tv);
798 /* we found an end */
799 ir_tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
800 return new_r_Const(irg, tv);
811 * Checks if an entity represents the empty string.
813 * @param ent the entity
815 * @return non-zero if ent represents the empty string
817 static int is_empty_string(ir_entity *ent)
819 ir_type *tp = get_entity_type(ent);
822 ir_initializer_t *initializer;
823 ir_initializer_t *init0;
825 if (! is_Array_type(tp))
827 tp = get_array_element_type(tp);
828 if (! is_Primitive_type(tp))
830 mode = get_type_mode(tp);
832 /* FIXME: This is too restrict, as the type char might be more the 8bits */
833 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
836 if (!has_entity_initializer(ent)) {
837 /* code for deprecated compound_graph_path stuff */
838 size_t n = get_compound_ent_n_values(ent);
841 irn = get_compound_ent_value(ent, 0);
843 return is_Const(irn) && is_Const_null(irn);
846 initializer = get_entity_initializer(ent);
847 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
850 if (get_initializer_compound_n_entries(initializer) < 1)
853 init0 = get_initializer_compound_value(initializer, 0);
854 return initializer_val_is_null(init0);
855 } /* is_empty_string */
857 /* A mapper for strcmp */
858 int i_mapper_strcmp(ir_node *call, void *ctx)
860 ir_node *left = get_Call_param(call, 0);
861 ir_node *right = get_Call_param(call, 1);
865 ir_type *call_tp = get_Call_type(call);
866 ir_type *res_tp = get_method_res_type(call_tp, 0);
867 ir_entity *ent_l, *ent_r;
873 /* do some type checks first */
874 if (! is_Primitive_type(res_tp))
876 char_tp = get_method_param_type(call_tp, 0);
877 if (char_tp != get_method_param_type(call_tp, 1))
879 if (! is_Pointer_type(char_tp))
881 char_tp = get_pointer_points_to_type(char_tp);
884 /* a strcmp(s, s) ==> 0 */
885 ir_graph *irg = get_irn_irg(call);
886 ir_node *mem = get_Call_mem(call);
887 ir_mode *mode = get_type_mode(res_tp);
889 irn = new_r_Const(irg, get_mode_null(mode));
890 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
891 replace_call(irn, call, mem, NULL, NULL);
894 ent_l = get_const_entity(left);
895 ent_r = get_const_entity(right);
897 if (ent_l != NULL && ent_r != NULL) {
898 /* both entities are const, try to evaluate */
899 irn = eval_strcmp(get_irn_irg(call), ent_l, ent_r, res_tp);
900 } else if (ent_l != NULL) {
901 if (is_empty_string(ent_l)) {
902 /* s strcmp("", s) ==> -(*s)*/
904 goto replace_by_call;
906 } else if (ent_r != NULL) {
907 if (is_empty_string(ent_r)) {
908 /* s strcmp(s, "") ==> (*s) */
909 ir_node *mem, *block;
915 mem = get_Call_mem(call);
916 block = get_nodes_block(call);
917 dbg = get_irn_dbg_info(call);
918 mode = get_type_mode(char_tp);
920 /* replace the strcmp by (*x) */
921 irn = new_rd_Load(dbg, block, mem, v, mode, cons_none);
922 mem = new_r_Proj(irn, mode_M, pn_Load_M);
923 exc = new_r_Proj(irn, mode_X, pn_Load_X_except);
924 reg = new_r_Proj(irn, mode_X, pn_Load_X_regular);
925 irn = new_r_Proj(irn, mode, pn_Load_res);
927 /* conv to the result mode */
928 mode = get_type_mode(res_tp);
929 irn = new_rd_Conv(dbg, block, irn, mode);
932 /* negate in the ("", s) case */
933 irn = new_rd_Minus(dbg, block, irn, mode);
939 ir_node *mem = get_Call_mem(call);
940 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
941 replace_call(irn, call, mem, reg, exc);
946 } /* i_mapper_strcmp */
948 /* A mapper for strncmp */
949 int i_mapper_strncmp(ir_node *call, void *ctx)
951 ir_node *left = get_Call_param(call, 0);
952 ir_node *right = get_Call_param(call, 1);
953 ir_node *len = get_Call_param(call, 2);
957 if (left == right || (is_Const(len) && is_Const_null(len))) {
958 /* a strncmp(s, s, len) ==> 0 OR
959 a strncmp(a, b, 0) ==> 0 */
960 ir_graph *irg = get_irn_irg(call);
961 ir_node *mem = get_Call_mem(call);
962 ir_node *adr = get_Call_ptr(call);
963 ir_entity *ent = get_SymConst_entity(adr);
964 ir_type *call_tp = get_entity_type(ent);
965 ir_type *res_tp = get_method_res_type(call_tp, 0);
966 ir_mode *mode = get_type_mode(res_tp);
968 irn = new_r_Const(irg, get_mode_null(mode));
969 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
970 replace_call(irn, call, mem, NULL, NULL);
974 } /* i_mapper_strncmp */
976 /* A mapper for strcpy */
977 int i_mapper_strcpy(ir_node *call, void *ctx)
979 ir_node *dst = get_Call_param(call, 0);
980 ir_node *src = get_Call_param(call, 1);
984 /* a strcpy(d, s) ==> d */
985 ir_node *mem = get_Call_mem(call);
986 ir_node *dst = get_Call_param(call, 0);
988 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
989 replace_call(dst, call, mem, NULL, NULL);
993 } /* i_mapper_strcpy */
995 /* A mapper for memcpy */
996 int i_mapper_memcpy(ir_node *call, void *ctx)
998 ir_node *dst = get_Call_param(call, 0);
999 ir_node *src = get_Call_param(call, 1);
1000 ir_node *len = get_Call_param(call, 2);
1003 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1004 /* a memcpy(d, d, len) ==> d OR
1005 a memcpy(d, s, 0) ==> d */
1006 ir_node *mem = get_Call_mem(call);
1008 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
1009 replace_call(dst, call, mem, NULL, NULL);
1013 } /* i_mapper_memcpy */
1015 /* A mapper for mempcpy */
1016 int i_mapper_mempcpy(ir_node *call, void *ctx)
1018 ir_node *dst = get_Call_param(call, 0);
1019 ir_node *src = get_Call_param(call, 1);
1020 ir_node *len = get_Call_param(call, 2);
1023 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1024 /* a memcpy(d, d, len) ==> d + len OR
1025 a memcpy(d, s, 0) ==> d + 0 */
1026 dbg_info *dbg = get_irn_dbg_info(call);
1027 ir_node *mem = get_Call_mem(call);
1028 ir_node *blk = get_nodes_block(call);
1029 ir_mode *mode = get_irn_mode(dst);
1030 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
1032 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
1033 replace_call(res, call, mem, NULL, NULL);
1037 } /* i_mapper_mempcpy */
1039 /* A mapper for memmove */
1040 int i_mapper_memmove(ir_node *call, void *ctx)
1042 ir_node *dst = get_Call_param(call, 0);
1043 ir_node *src = get_Call_param(call, 1);
1044 ir_node *len = get_Call_param(call, 2);
1047 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1048 /* a memmove(d, d, len) ==> d OR
1049 a memmove(d, s, 0) ==> d */
1050 ir_node *mem = get_Call_mem(call);
1052 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
1053 replace_call(dst, call, mem, NULL, NULL);
1057 } /* i_mapper_memmove */
1059 /* A mapper for memset */
1060 int i_mapper_memset(ir_node *call, void *ctx)
1062 ir_node *len = get_Call_param(call, 2);
1065 if (is_Const(len) && is_Const_null(len)) {
1066 /* a memset(d, C, 0) ==> d */
1067 ir_node *mem = get_Call_mem(call);
1068 ir_node *dst = get_Call_param(call, 0);
1070 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
1071 replace_call(dst, call, mem, NULL, NULL);
1075 } /* i_mapper_memset */
1077 /* A mapper for memcmp */
1078 int i_mapper_memcmp(ir_node *call, void *ctx)
1080 ir_node *left = get_Call_param(call, 0);
1081 ir_node *right = get_Call_param(call, 1);
1082 ir_node *len = get_Call_param(call, 2);
1086 if (left == right || (is_Const(len) && is_Const_null(len))) {
1087 /* a memcmp(s, s, len) ==> 0 OR
1088 a memcmp(a, b, 0) ==> 0 */
1089 ir_graph *irg = get_irn_irg(call);
1090 ir_node *mem = get_Call_mem(call);
1091 ir_node *adr = get_Call_ptr(call);
1092 ir_entity *ent = get_SymConst_entity(adr);
1093 ir_type *call_tp = get_entity_type(ent);
1094 ir_type *res_tp = get_method_res_type(call_tp, 0);
1095 ir_mode *mode = get_type_mode(res_tp);
1097 irn = new_r_Const(irg, get_mode_null(mode));
1098 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1099 replace_call(irn, call, mem, NULL, NULL);
1103 } /* i_mapper_memcmp */
1106 * Returns the result mode of a node.
1108 static ir_mode *get_irn_res_mode(ir_node *node)
1110 switch (get_irn_opcode(node)) {
1111 case iro_Load: return get_Load_mode(node);
1112 case iro_Div: return get_Div_resmode(node);
1113 case iro_Mod: return get_Mod_resmode(node);
1114 default: return NULL;
1116 } /* get_irn_res_mode */
1118 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
1120 /* A mapper for mapping unsupported instructions to runtime calls. */
1121 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt)
1123 int i, j, arity, first, n_param, n_res;
1126 ir_node *mem, *bl, *call, *addr, *res_proj;
1129 symconst_symbol sym;
1130 ir_mode *mode = get_irn_mode(node);
1132 if (mode != rt->mode)
1134 /* check if the result modes match */
1135 if (mode == mode_T && rt->res_mode != NULL) {
1136 mode = get_irn_res_mode(node);
1137 if (mode != rt->res_mode)
1141 arity = get_irn_arity(node);
1145 mtp = get_entity_type(rt->ent);
1146 n_param = get_method_n_params(mtp);
1147 irg = current_ir_graph;
1149 mem = get_irn_n(node, 0);
1150 if (get_irn_mode(mem) != mode_M) {
1151 mem = new_r_NoMem(irg);
1156 /* check if the modes of the predecessors match the parameter modes */
1157 if (arity - first != n_param)
1160 for (i = first, j = 0; i < arity; ++i, ++j) {
1161 ir_type *param_tp = get_method_param_type(mtp, j);
1162 ir_node *pred = get_irn_n(node, i);
1164 if (get_type_mode(param_tp) != get_irn_mode(pred))
1168 n_res = get_method_n_ress(mtp);
1170 /* step 0: calculate the number of needed Proj's */
1172 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
1173 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1174 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1175 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
1176 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
1179 if (rt->mode != mode_T) /* must be mode_T */
1184 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1188 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1189 bl = get_nodes_block(node);
1193 NEW_ARR_A(ir_node *, in, n_param);
1194 for (i = 0; i < n_param; ++i)
1195 in[i] = get_irn_n(node, first + i);
1198 /* step 1: create the call */
1199 sym.entity_p = rt->ent;
1200 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1201 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1202 set_irn_pinned(call, get_irn_pinned(node));
1205 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1210 n_proj += n_res - 1;
1213 turn_into_tuple(node, n_proj);
1215 if (rt->mem_proj_nr >= 0)
1216 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1217 if (!is_NoMem(mem)) {
1218 /* Exceptions can only be handled with real memory */
1219 if (rt->regular_proj_nr >= 0)
1220 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_regular));
1221 if (rt->exc_proj_nr >= 0)
1222 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_except));
1223 if (rt->exc_mem_proj_nr >= 0)
1224 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1227 if (rt->res_proj_nr >= 0) {
1228 for (i = 0; i < n_res; ++i) {
1229 ir_mode *mode = get_type_mode(get_method_res_type(mtp, i));
1230 ir_node *proj = new_r_Proj(res_proj, mode, i);
1231 set_Tuple_pred(node, rt->res_proj_nr + i, proj);
1236 /* only one return value supported */
1238 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1240 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1241 res_proj = new_r_Proj(res_proj, mode, 0);
1243 exchange(node, res_proj);
1247 /* should not happen */
1249 } /* i_mapper_RuntimeCall */