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);
147 set_irg_loopinfo_inconsistent(irg);
149 /* Calls might be removed/added. */
150 set_trouts_inconsistent();
153 irg_verify(irg, VERIFY_NORMAL);
155 nr_of_intrinsics += wenv.nr_of_intrinsics;
160 return nr_of_intrinsics;
161 } /* lower_intrinsics */
163 typedef struct pass_t {
172 * Wrapper for running lower_intrinsics() as an ir_prog pass.
174 static int pass_wrapper(ir_prog *irp, void *context)
176 pass_t *pass = (pass_t*)context;
177 (void) irp; /* TODO: set current irp, or remove parameter */
178 lower_intrinsics(pass->list, pass->length, pass->part_block_used);
179 /* probably this pass should not run again */
184 * Creates an ir_prog pass for lower_intrinsics.
186 * @param name the name of this pass or NULL
187 * @param list an array of intrinsic map records
188 * @param length the length of the array
189 * @param part_block_used set to true if part_block() must be using during lowering
191 ir_prog_pass_t *lower_intrinsics_pass(
193 i_record *list, size_t length, int part_block_used)
195 pass_t *pass = (pass_t*)xmalloc(sizeof(*pass) + (length-1) * sizeof(pass->list[0]));
197 memcpy(pass->list, list, sizeof(list[0]) * length);
198 pass->length = length;
199 pass->part_block_used = part_block_used;
201 return def_prog_pass_constructor(
202 &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
203 } /* lower_intrinsics_pass*/
206 * Helper function, replace the call by the given node.
208 * @param irn the result node
209 * @param call the call to replace
210 * @param mem the new mem result
211 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
212 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
214 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp)
216 ir_node *block = get_nodes_block(call);
217 ir_graph *irg = get_irn_irg(block);
219 if (reg_jmp == NULL) {
221 /* Beware: do we need here a protection against CSE? Better we do it. */
222 int old_cse = get_opt_cse();
224 reg_jmp = new_r_Jmp(block);
225 set_opt_cse(old_cse);
226 exc_jmp = new_r_Bad(irg, mode_X);
228 irn = new_r_Tuple(block, 1, &irn);
230 turn_into_tuple(call, pn_Call_max);
231 set_Tuple_pred(call, pn_Call_M, mem);
232 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
233 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
234 set_Tuple_pred(call, pn_Call_T_result, irn);
237 /* A mapper for the integer abs. */
238 int i_mapper_abs(ir_node *call, void *ctx)
240 ir_node *mem = get_Call_mem(call);
241 ir_node *block = get_nodes_block(call);
242 ir_node *op = get_Call_param(call, 0);
243 ir_graph *irg = get_irn_irg(call);
244 ir_mode *mode = get_irn_mode(op);
245 dbg_info *dbg = get_irn_dbg_info(call);
246 ir_node *zero = new_r_Const(irg, get_mode_null(mode));
247 ir_node *cmp = new_rd_Cmp(dbg, block, op, zero, ir_relation_less);
248 ir_node *minus_op = new_rd_Minus(dbg, block, op, mode);
250 arch_allow_ifconv_func allow_ifconv = be_get_backend_param()->allow_ifconv;
253 /* mux allowed by backend? */
254 if (!allow_ifconv(cmp, op, minus_op))
258 mux = new_rd_Mux(dbg, block, cmp, op, minus_op, mode);
259 DBG_OPT_ALGSIM0(call, mux, FS_OPT_RTS_ABS);
260 replace_call(mux, call, mem, NULL, NULL);
264 /* A mapper for the integer bswap. */
265 int i_mapper_bswap(ir_node *call, void *ctx)
267 ir_node *mem = get_Call_mem(call);
268 ir_node *block = get_nodes_block(call);
269 ir_node *op = get_Call_param(call, 0);
270 ir_type *tp = get_Call_type(call);
271 dbg_info *dbg = get_irn_dbg_info(call);
275 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
276 set_irn_pinned(irn, op_pin_state_floats);
277 irn = new_r_Proj(irn, get_irn_mode(op), pn_Builtin_1_result);
278 replace_call(irn, call, mem, NULL, NULL);
280 } /* i_mapper_bswap */
282 /* A mapper for the alloca() function. */
283 int i_mapper_alloca(ir_node *call, void *ctx)
285 ir_node *mem = get_Call_mem(call);
286 ir_node *block = get_nodes_block(call);
287 ir_node *op = get_Call_param(call, 0);
288 ir_node *irn, *exc, *no_exc;
289 dbg_info *dbg = get_irn_dbg_info(call);
292 if (mode_is_signed(get_irn_mode(op))) {
293 ir_mode *mode = get_irn_mode(op);
294 mode = find_unsigned_mode(mode);
296 panic("Cannot find unsigned mode for %M", mode);
298 op = new_rd_Conv(dbg, block, op, mode);
301 irn = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
302 mem = new_rd_Proj(dbg, irn, mode_M, pn_Alloc_M);
303 no_exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_regular);
304 exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_except);
305 irn = new_rd_Proj(dbg, irn, get_modeP_data(), pn_Alloc_res);
307 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
308 replace_call(irn, call, mem, no_exc, exc);
310 } /* i_mapper_alloca */
312 /* A mapper for the floating point sqrt. */
313 int i_mapper_sqrt(ir_node *call, void *ctx)
317 ir_node *op = get_Call_param(call, 0);
323 tv = get_Const_tarval(op);
324 if (! tarval_is_null(tv) && !tarval_is_one(tv))
327 mem = get_Call_mem(call);
329 /* sqrt(0) = 0, sqrt(1) = 1 */
330 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
331 replace_call(op, call, mem, NULL, NULL);
333 } /* i_mapper_sqrt */
335 /* A mapper for the floating point cbrt. */
336 int i_mapper_cbrt(ir_node *call, void *ctx)
340 ir_node *op = get_Call_param(call, 0);
346 tv = get_Const_tarval(op);
347 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
350 mem = get_Call_mem(call);
352 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
353 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
354 replace_call(op, call, mem, NULL, NULL);
356 } /* i_mapper_cbrt */
358 /* A mapper for the floating point pow. */
359 int i_mapper_pow(ir_node *call, void *ctx)
363 ir_node *left = get_Call_param(call, 0);
364 ir_node *right = get_Call_param(call, 1);
365 ir_node *block = get_nodes_block(call);
366 ir_graph *irg = get_irn_irg(block);
367 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
370 if (is_Const(left) && is_Const_one(left)) {
371 /* pow (1.0, x) = 1.0 */
373 } else if (is_Const(right)) {
374 ir_tarval *tv = get_Const_tarval(right);
375 if (tarval_is_null(tv)) {
376 /* pow(x, 0.0) = 1.0 */
377 ir_mode *mode = get_tarval_mode(tv);
378 irn = new_r_Const(irg, get_mode_one(mode));
379 } else if (tarval_is_one(tv)) {
380 /* pow(x, 1.0) = x */
382 } else if (tarval_is_minus_one(tv)) {
383 /* pow(x, -1.0) = 1/x */
391 mem = get_Call_mem(call);
392 dbg = get_irn_dbg_info(call);
395 ir_mode *mode = get_irn_mode(left);
398 irn = new_r_Const(irg, get_mode_one(mode));
399 div = new_rd_Div(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
400 mem = new_r_Proj(div, mode_M, pn_Div_M);
401 irn = new_r_Proj(div, mode, pn_Div_res);
402 reg_jmp = new_r_Proj(div, mode_X, pn_Div_X_regular);
403 exc_jmp = new_r_Proj(div, mode_X, pn_Div_X_except);
405 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
406 replace_call(irn, call, mem, reg_jmp, exc_jmp);
410 /* A mapper for the floating point exp. */
411 int i_mapper_exp(ir_node *call, void *ctx)
413 ir_node *val = get_Call_param(call, 0);
416 if (is_Const(val) && is_Const_null(val)) {
418 ir_graph *irg = get_irn_irg(val);
419 ir_mode *mode = get_irn_mode(val);
420 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
421 ir_node *mem = get_Call_mem(call);
422 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
423 replace_call(irn, call, mem, NULL, NULL);
430 * A mapper for mapping f(0.0) to 0.0.
432 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
434 ir_node *val = get_Call_param(call, 0);
437 if (is_Const(val) && is_Const_null(val)) {
439 ir_node *mem = get_Call_mem(call);
440 DBG_OPT_ALGSIM0(call, val, reason);
441 replace_call(val, call, mem, NULL, NULL);
445 } /* i_mapper_zero_to_zero */
448 * A mapper for mapping f(1.0) to 0.0.
450 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
452 ir_node *val = get_Call_param(call, 0);
455 if (is_Const(val) && is_Const_one(val)) {
456 /* acos(1.0) = 0.0 */
457 ir_graph *irg = get_irn_irg(val);
458 ir_mode *mode = get_irn_mode(val);
459 ir_node *irn = new_r_Const(irg, get_mode_null(mode));
460 ir_node *mem = get_Call_mem(call);
461 DBG_OPT_ALGSIM0(call, irn, reason);
462 replace_call(irn, call, mem, NULL, NULL);
466 } /* i_mapper_one_to_zero */
469 * A mapper for mapping a functions with the following characteristics:
473 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
476 ir_node *val = get_Call_param(call, 0);
479 if (is_strictConv(val)) {
480 ir_node *op = get_Conv_op(val);
482 /* f(-x) = f(x) with strictConv */
483 ir_node *block = get_nodes_block(call);
484 ir_mode *mode = get_irn_mode(val);
485 dbg_info *dbg = get_irn_dbg_info(val);
487 op = get_Minus_op(op);
488 val = new_rd_Conv(dbg, block, op, mode);
491 set_Conv_strict(val, 1);
493 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
494 set_Call_param(call, 0, val);
497 } else if (is_Minus(val)) {
499 val = get_Minus_op(val);
500 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
501 set_Call_param(call, 0, val);
505 if (is_Const(val) && is_Const_null(val)) {
507 ir_graph *irg = get_irn_irg(val);
508 ir_mode *mode = get_irn_mode(val);
509 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
510 ir_node *mem = get_Call_mem(call);
511 DBG_OPT_ALGSIM0(call, irn, reason);
512 replace_call(irn, call, mem, NULL, NULL);
516 } /* i_mapper_symmetric_zero_to_one */
518 /* A mapper for the floating point log. */
519 int i_mapper_log(ir_node *call, void *ctx)
522 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
525 /* A mapper for the floating point sin. */
526 int i_mapper_sin(ir_node *call, void *ctx)
529 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
532 /* A mapper for the floating point cos. */
533 int i_mapper_cos(ir_node *call, void *ctx)
535 /* cos(0.0) = 1.0, cos(-x) = x */
536 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
539 /* A mapper for the floating point tan. */
540 int i_mapper_tan(ir_node *call, void *ctx)
543 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
546 /* A mapper for the floating point asin. */
547 int i_mapper_asin(ir_node *call, void *ctx)
549 /* asin(0.0) = 0.0 */
550 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
551 } /* i_mapper_asin */
553 /* A mapper for the floating point acos. */
554 int i_mapper_acos(ir_node *call, void *ctx)
556 /* acos(1.0) = 0.0 */
557 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
558 } /* i_mapper_acos */
560 /* A mapper for the floating point atan. */
561 int i_mapper_atan(ir_node *call, void *ctx)
563 /* atan(0.0) = 0.0 */
564 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
565 } /* i_mapper_atan */
567 /* A mapper for the floating point sinh. */
568 int i_mapper_sinh(ir_node *call, void *ctx)
570 /* sinh(0.0) = 0.0 */
571 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
572 } /* i_mapper_sinh */
574 /* A mapper for the floating point cosh. */
575 int i_mapper_cosh(ir_node *call, void *ctx)
577 /* cosh(0.0) = 1.0, cosh(-x) = x */
578 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
579 } /* i_mapper_cosh */
581 /* A mapper for the floating point tanh. */
582 int i_mapper_tanh(ir_node *call, void *ctx)
584 /* tanh(0.0) = 0.0 */
585 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
586 } /* i_mapper_tanh */
589 * Return the const entity that is accessed through the pointer ptr or
590 * NULL if there is no entity (or the entity is not constant).
592 * @param ptr the pointer
594 static ir_entity *get_const_entity(ir_node *ptr)
596 if (is_Global(ptr)) {
597 ir_entity *ent = get_Global_entity(ptr);
599 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
600 /* a constant entity */
605 } /* get_const_entity */
607 static bool initializer_val_is_null(ir_initializer_t *init)
611 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
614 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
615 tv = get_initializer_tarval_value(init);
616 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
617 ir_node *irn = get_initializer_const_value(init);
620 tv = get_Const_tarval(irn);
625 return tarval_is_null(tv);
629 * Calculate the value of strlen if possible.
631 * @param ent the entity
632 * @param res_tp the result type
634 * @return a Const node containing the strlen() result or NULL
635 * if the evaluation fails
637 static ir_node *eval_strlen(ir_graph *irg, ir_entity *ent, ir_type *res_tp)
639 ir_type *tp = get_entity_type(ent);
641 ir_initializer_t *initializer;
645 if (! is_Array_type(tp))
647 tp = get_array_element_type(tp);
648 if (! is_Primitive_type(tp))
650 mode = get_type_mode(tp);
652 /* FIXME: This is too restrict, as the type char might be more the 8bits */
653 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
656 if (!has_entity_initializer(ent)) {
659 n = get_compound_ent_n_values(ent);
660 for (i = 0; i < n; ++i) {
661 ir_node *irn = get_compound_ent_value(ent, i);
666 if (is_Const_null(irn)) {
667 /* found the length */
668 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
669 return new_r_Const(irg, tv);
675 initializer = get_entity_initializer(ent);
676 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
679 size = get_initializer_compound_n_entries(initializer);
680 for (i = 0; i < size; ++i) {
681 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
682 if (initializer_val_is_null(val)) {
683 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
684 return new_r_Const(irg, tv);
691 /* A mapper for strlen */
692 int i_mapper_strlen(ir_node *call, void *ctx)
694 ir_node *s = get_Call_param(call, 0);
695 ir_entity *ent = get_const_entity(s);
699 /* FIXME: this cannot handle constant strings inside struct initializers yet */
701 /* a constant entity */
702 ir_type *tp = get_Call_type(call);
705 tp = get_method_res_type(tp, 0);
706 irn = eval_strlen(get_irn_irg(call), ent, tp);
709 ir_node *mem = get_Call_mem(call);
710 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
711 replace_call(irn, call, mem, NULL, NULL);
716 } /* i_mapper_strlen */
719 * Calculate the value of strlen if possible.
721 * @param left the left entity
722 * @param right the right entity
723 * @param res_tp the result type
725 * @return a Const node containing the strcmp() result or NULL
726 * if the evaluation fails
728 static ir_node *eval_strcmp(ir_graph *irg, ir_entity *left, ir_entity *right,
734 tp = get_entity_type(left);
735 if (! is_Array_type(tp))
737 tp = get_array_element_type(tp);
738 if (! is_Primitive_type(tp))
740 mode = get_type_mode(tp);
742 /* FIXME: This is too restrict, as the type char might be more the 8bits */
743 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
746 tp = get_entity_type(right);
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 if (!has_entity_initializer(left) && !has_entity_initializer(right)) {
759 /* code that uses deprecated compound_graph_path stuff */
760 size_t n = get_compound_ent_n_values(left);
761 size_t n_r = get_compound_ent_n_values(right);
767 for (i = 0; i < n; ++i) {
772 irn = get_compound_ent_value(left, i);
775 tv = get_Const_tarval(irn);
776 v_l = get_tarval_long(tv);
778 irn = get_compound_ent_value(right, i);
781 tv = get_Const_tarval(irn);
782 v_r = get_tarval_long(tv);
799 /* we found an end */
800 ir_tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
801 return new_r_Const(irg, tv);
812 * Checks if an entity represents the empty string.
814 * @param ent the entity
816 * @return non-zero if ent represents the empty string
818 static int is_empty_string(ir_entity *ent)
820 ir_type *tp = get_entity_type(ent);
823 ir_initializer_t *initializer;
824 ir_initializer_t *init0;
826 if (! is_Array_type(tp))
828 tp = get_array_element_type(tp);
829 if (! is_Primitive_type(tp))
831 mode = get_type_mode(tp);
833 /* FIXME: This is too restrict, as the type char might be more the 8bits */
834 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
837 if (!has_entity_initializer(ent)) {
838 /* code for deprecated compound_graph_path stuff */
839 size_t n = get_compound_ent_n_values(ent);
842 irn = get_compound_ent_value(ent, 0);
844 return is_Const(irn) && is_Const_null(irn);
847 initializer = get_entity_initializer(ent);
848 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
851 if (get_initializer_compound_n_entries(initializer) < 1)
854 init0 = get_initializer_compound_value(initializer, 0);
855 return initializer_val_is_null(init0);
856 } /* is_empty_string */
858 /* A mapper for strcmp */
859 int i_mapper_strcmp(ir_node *call, void *ctx)
861 ir_node *left = get_Call_param(call, 0);
862 ir_node *right = get_Call_param(call, 1);
866 ir_type *call_tp = get_Call_type(call);
867 ir_type *res_tp = get_method_res_type(call_tp, 0);
868 ir_entity *ent_l, *ent_r;
874 /* do some type checks first */
875 if (! is_Primitive_type(res_tp))
877 char_tp = get_method_param_type(call_tp, 0);
878 if (char_tp != get_method_param_type(call_tp, 1))
880 if (! is_Pointer_type(char_tp))
882 char_tp = get_pointer_points_to_type(char_tp);
885 /* a strcmp(s, s) ==> 0 */
886 ir_graph *irg = get_irn_irg(call);
887 ir_node *mem = get_Call_mem(call);
888 ir_mode *mode = get_type_mode(res_tp);
890 irn = new_r_Const(irg, get_mode_null(mode));
891 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
892 replace_call(irn, call, mem, NULL, NULL);
895 ent_l = get_const_entity(left);
896 ent_r = get_const_entity(right);
898 if (ent_l != NULL && ent_r != NULL) {
899 /* both entities are const, try to evaluate */
900 irn = eval_strcmp(get_irn_irg(call), ent_l, ent_r, res_tp);
901 } else if (ent_l != NULL) {
902 if (is_empty_string(ent_l)) {
903 /* s strcmp("", s) ==> -(*s)*/
905 goto replace_by_call;
907 } else if (ent_r != NULL) {
908 if (is_empty_string(ent_r)) {
909 /* s strcmp(s, "") ==> (*s) */
910 ir_node *mem, *block;
916 mem = get_Call_mem(call);
917 block = get_nodes_block(call);
918 dbg = get_irn_dbg_info(call);
919 mode = get_type_mode(char_tp);
921 /* replace the strcmp by (*x) */
922 irn = new_rd_Load(dbg, block, mem, v, mode, cons_none);
923 mem = new_r_Proj(irn, mode_M, pn_Load_M);
924 exc = new_r_Proj(irn, mode_X, pn_Load_X_except);
925 reg = new_r_Proj(irn, mode_X, pn_Load_X_regular);
926 irn = new_r_Proj(irn, mode, pn_Load_res);
928 /* conv to the result mode */
929 mode = get_type_mode(res_tp);
930 irn = new_rd_Conv(dbg, block, irn, mode);
933 /* negate in the ("", s) case */
934 irn = new_rd_Minus(dbg, block, irn, mode);
940 ir_node *mem = get_Call_mem(call);
941 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
942 replace_call(irn, call, mem, reg, exc);
947 } /* i_mapper_strcmp */
949 /* A mapper for strncmp */
950 int i_mapper_strncmp(ir_node *call, void *ctx)
952 ir_node *left = get_Call_param(call, 0);
953 ir_node *right = get_Call_param(call, 1);
954 ir_node *len = get_Call_param(call, 2);
958 if (left == right || (is_Const(len) && is_Const_null(len))) {
959 /* a strncmp(s, s, len) ==> 0 OR
960 a strncmp(a, b, 0) ==> 0 */
961 ir_graph *irg = get_irn_irg(call);
962 ir_node *mem = get_Call_mem(call);
963 ir_node *adr = get_Call_ptr(call);
964 ir_entity *ent = get_SymConst_entity(adr);
965 ir_type *call_tp = get_entity_type(ent);
966 ir_type *res_tp = get_method_res_type(call_tp, 0);
967 ir_mode *mode = get_type_mode(res_tp);
969 irn = new_r_Const(irg, get_mode_null(mode));
970 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
971 replace_call(irn, call, mem, NULL, NULL);
975 } /* i_mapper_strncmp */
977 /* A mapper for strcpy */
978 int i_mapper_strcpy(ir_node *call, void *ctx)
980 ir_node *dst = get_Call_param(call, 0);
981 ir_node *src = get_Call_param(call, 1);
985 /* a strcpy(d, s) ==> d */
986 ir_node *mem = get_Call_mem(call);
987 ir_node *dst = get_Call_param(call, 0);
989 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
990 replace_call(dst, call, mem, NULL, NULL);
994 } /* i_mapper_strcpy */
996 /* A mapper for memcpy */
997 int i_mapper_memcpy(ir_node *call, void *ctx)
999 ir_node *dst = get_Call_param(call, 0);
1000 ir_node *src = get_Call_param(call, 1);
1001 ir_node *len = get_Call_param(call, 2);
1004 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1005 /* a memcpy(d, d, len) ==> d OR
1006 a memcpy(d, s, 0) ==> d */
1007 ir_node *mem = get_Call_mem(call);
1009 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
1010 replace_call(dst, call, mem, NULL, NULL);
1014 } /* i_mapper_memcpy */
1016 /* A mapper for mempcpy */
1017 int i_mapper_mempcpy(ir_node *call, void *ctx)
1019 ir_node *dst = get_Call_param(call, 0);
1020 ir_node *src = get_Call_param(call, 1);
1021 ir_node *len = get_Call_param(call, 2);
1024 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1025 /* a memcpy(d, d, len) ==> d + len OR
1026 a memcpy(d, s, 0) ==> d + 0 */
1027 dbg_info *dbg = get_irn_dbg_info(call);
1028 ir_node *mem = get_Call_mem(call);
1029 ir_node *blk = get_nodes_block(call);
1030 ir_mode *mode = get_irn_mode(dst);
1031 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
1033 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
1034 replace_call(res, call, mem, NULL, NULL);
1038 } /* i_mapper_mempcpy */
1040 /* A mapper for memmove */
1041 int i_mapper_memmove(ir_node *call, void *ctx)
1043 ir_node *dst = get_Call_param(call, 0);
1044 ir_node *src = get_Call_param(call, 1);
1045 ir_node *len = get_Call_param(call, 2);
1048 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1049 /* a memmove(d, d, len) ==> d OR
1050 a memmove(d, s, 0) ==> d */
1051 ir_node *mem = get_Call_mem(call);
1053 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
1054 replace_call(dst, call, mem, NULL, NULL);
1058 } /* i_mapper_memmove */
1060 /* A mapper for memset */
1061 int i_mapper_memset(ir_node *call, void *ctx)
1063 ir_node *len = get_Call_param(call, 2);
1066 if (is_Const(len) && is_Const_null(len)) {
1067 /* a memset(d, C, 0) ==> d */
1068 ir_node *mem = get_Call_mem(call);
1069 ir_node *dst = get_Call_param(call, 0);
1071 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
1072 replace_call(dst, call, mem, NULL, NULL);
1076 } /* i_mapper_memset */
1078 /* A mapper for memcmp */
1079 int i_mapper_memcmp(ir_node *call, void *ctx)
1081 ir_node *left = get_Call_param(call, 0);
1082 ir_node *right = get_Call_param(call, 1);
1083 ir_node *len = get_Call_param(call, 2);
1087 if (left == right || (is_Const(len) && is_Const_null(len))) {
1088 /* a memcmp(s, s, len) ==> 0 OR
1089 a memcmp(a, b, 0) ==> 0 */
1090 ir_graph *irg = get_irn_irg(call);
1091 ir_node *mem = get_Call_mem(call);
1092 ir_node *adr = get_Call_ptr(call);
1093 ir_entity *ent = get_SymConst_entity(adr);
1094 ir_type *call_tp = get_entity_type(ent);
1095 ir_type *res_tp = get_method_res_type(call_tp, 0);
1096 ir_mode *mode = get_type_mode(res_tp);
1098 irn = new_r_Const(irg, get_mode_null(mode));
1099 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1100 replace_call(irn, call, mem, NULL, NULL);
1104 } /* i_mapper_memcmp */
1107 * Returns the result mode of a node.
1109 static ir_mode *get_irn_res_mode(ir_node *node)
1111 switch (get_irn_opcode(node)) {
1112 case iro_Load: return get_Load_mode(node);
1113 case iro_Div: return get_Div_resmode(node);
1114 case iro_Mod: return get_Mod_resmode(node);
1115 default: return NULL;
1117 } /* get_irn_res_mode */
1119 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
1121 /* A mapper for mapping unsupported instructions to runtime calls. */
1122 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt)
1124 int i, j, arity, first, n_param, n_res;
1127 ir_node *mem, *bl, *call, *addr, *res_proj;
1130 symconst_symbol sym;
1131 ir_mode *mode = get_irn_mode(node);
1133 if (mode != rt->mode)
1135 /* check if the result modes match */
1136 if (mode == mode_T && rt->res_mode != NULL) {
1137 mode = get_irn_res_mode(node);
1138 if (mode != rt->res_mode)
1142 arity = get_irn_arity(node);
1146 mtp = get_entity_type(rt->ent);
1147 n_param = get_method_n_params(mtp);
1148 irg = current_ir_graph;
1150 mem = get_irn_n(node, 0);
1151 if (get_irn_mode(mem) != mode_M) {
1152 mem = new_r_NoMem(irg);
1157 /* check if the modes of the predecessors match the parameter modes */
1158 if (arity - first != n_param)
1161 for (i = first, j = 0; i < arity; ++i, ++j) {
1162 ir_type *param_tp = get_method_param_type(mtp, j);
1163 ir_node *pred = get_irn_n(node, i);
1165 if (get_type_mode(param_tp) != get_irn_mode(pred))
1169 n_res = get_method_n_ress(mtp);
1171 /* step 0: calculate the number of needed Proj's */
1173 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
1174 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1175 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1176 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
1177 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
1180 if (rt->mode != mode_T) /* must be mode_T */
1185 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1189 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1190 bl = get_nodes_block(node);
1194 NEW_ARR_A(ir_node *, in, n_param);
1195 for (i = 0; i < n_param; ++i)
1196 in[i] = get_irn_n(node, first + i);
1199 /* step 1: create the call */
1200 sym.entity_p = rt->ent;
1201 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1202 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1203 set_irn_pinned(call, get_irn_pinned(node));
1206 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1211 n_proj += n_res - 1;
1214 turn_into_tuple(node, n_proj);
1216 if (rt->mem_proj_nr >= 0)
1217 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1218 if (!is_NoMem(mem)) {
1219 /* Exceptions can only be handled with real memory */
1220 if (rt->regular_proj_nr >= 0)
1221 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_regular));
1222 if (rt->exc_proj_nr >= 0)
1223 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_except));
1224 if (rt->exc_mem_proj_nr >= 0)
1225 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1228 if (rt->res_proj_nr >= 0) {
1229 for (i = 0; i < n_res; ++i) {
1230 ir_mode *mode = get_type_mode(get_method_res_type(mtp, i));
1231 ir_node *proj = new_r_Proj(res_proj, mode, i);
1232 set_Tuple_pred(node, rt->res_proj_nr + i, proj);
1237 /* only one return value supported */
1239 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1241 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1242 res_proj = new_r_Proj(res_proj, mode, 0);
1244 exchange(node, res_proj);
1248 /* should not happen */
1250 } /* i_mapper_RuntimeCall */