2 * Copyright (C) 1995-2008 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 unsigned 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 unsigned lower_intrinsics(i_record *list, int length, int part_block_used)
98 int i, n_ops = get_irp_n_opcodes();
100 pmap *c_map = pmap_create_ex(length);
101 i_instr_record **i_map;
102 unsigned nr_of_intrinsics = 0;
105 /* we use the ir_op generic pointers here */
106 NEW_ARR_A(i_instr_record *, i_map, n_ops);
107 memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
109 /* fill a map for faster search */
110 for (i = length - 1; i >= 0; --i) {
111 if (list[i].i_call.kind == INTRINSIC_CALL) {
112 pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
114 ir_op *op = list[i].i_instr.op;
115 assert(op->code < (unsigned) ARR_LEN(i_map));
117 list[i].i_instr.link = i_map[op->code];
118 i_map[op->code] = &list[i].i_instr;
125 for (i = get_irp_n_irgs() - 1; i >= 0; --i) {
126 irg = get_irp_irg(i);
128 if (part_block_used) {
129 ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
130 collect_phiprojs(irg);
133 wenv.nr_of_intrinsics = 0;
134 irg_walk_graph(irg, NULL, call_mapper, &wenv);
137 ir_free_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
139 if (wenv.nr_of_intrinsics > 0) {
140 /* Changes detected: we might have added/removed nodes. */
141 set_irg_outs_inconsistent(irg);
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 /* Optimize it, tuple might be created. */
156 optimize_graph_df(irg);
158 nr_of_intrinsics += wenv.nr_of_intrinsics;
163 return nr_of_intrinsics;
164 } /* lower_intrinsics */
166 typedef struct pass_t {
175 * Wrapper for running lower_intrinsics() as an ir_prog pass.
177 static int pass_wrapper(ir_prog *irp, void *context)
179 pass_t *pass = (pass_t*)context;
180 (void) irp; /* TODO: set current irp, or remove parameter */
181 lower_intrinsics(pass->list, pass->length, pass->part_block_used);
182 /* probably this pass should not run again */
187 * Creates an ir_prog pass for lower_intrinsics.
189 * @param name the name of this pass or NULL
190 * @param list an array of intrinsic map records
191 * @param length the length of the array
192 * @param part_block_used set to true if part_block() must be using during lowering
194 ir_prog_pass_t *lower_intrinsics_pass(
196 i_record *list, int length, int part_block_used)
198 pass_t *pass = (pass_t*)xmalloc(sizeof(*pass) + (length-1) * sizeof(pass->list[0]));
200 memcpy(pass->list, list, sizeof(list[0]) * length);
201 pass->length = length;
202 pass->part_block_used = part_block_used;
204 return def_prog_pass_constructor(
205 &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
206 } /* lower_intrinsics_pass*/
209 * Helper function, replace the call by the given node.
211 * @param irn the result node
212 * @param call the call to replace
213 * @param mem the new mem result
214 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
215 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
217 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp)
219 ir_node *block = get_nodes_block(call);
220 ir_graph *irg = get_irn_irg(block);
222 if (reg_jmp == NULL) {
224 /* Beware: do we need here a protection against CSE? Better we do it. */
225 int old_cse = get_opt_cse();
227 reg_jmp = new_r_Jmp(block);
228 set_opt_cse(old_cse);
229 exc_jmp = new_r_Bad(irg);
231 irn = new_r_Tuple(block, 1, &irn);
233 turn_into_tuple(call, pn_Call_max);
234 set_Tuple_pred(call, pn_Call_M, mem);
235 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
236 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
237 set_Tuple_pred(call, pn_Call_T_result, irn);
238 set_Tuple_pred(call, pn_Call_P_value_res_base, new_r_Bad(irg));
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);
252 ir_node *cond = new_r_Proj(cmp, mode_b, pn_Cmp_Lt);
253 ir_node *minus_op = new_rd_Minus(dbg, block, op, mode);
255 arch_allow_ifconv_func allow_ifconv = be_get_backend_param()->allow_ifconv;
258 /* mux allowed by backend? */
259 if (!allow_ifconv(cond, op, minus_op))
263 mux = new_rd_Mux(dbg, block, cond, op, minus_op, mode);
264 DBG_OPT_ALGSIM0(call, mux, FS_OPT_RTS_ABS);
265 replace_call(mux, call, mem, NULL, NULL);
269 /* A mapper for the integer bswap. */
270 int i_mapper_bswap(ir_node *call, void *ctx)
272 ir_node *mem = get_Call_mem(call);
273 ir_node *block = get_nodes_block(call);
274 ir_node *op = get_Call_param(call, 0);
275 ir_type *tp = get_Call_type(call);
276 dbg_info *dbg = get_irn_dbg_info(call);
280 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
281 set_irn_pinned(irn, op_pin_state_floats);
282 irn = new_r_Proj(irn, get_irn_mode(op), pn_Builtin_1_result);
283 replace_call(irn, call, mem, NULL, NULL);
285 } /* i_mapper_bswap */
287 /* A mapper for the alloca() function. */
288 int i_mapper_alloca(ir_node *call, void *ctx)
290 ir_node *mem = get_Call_mem(call);
291 ir_node *block = get_nodes_block(call);
292 ir_node *op = get_Call_param(call, 0);
293 ir_node *irn, *exc, *no_exc;
294 dbg_info *dbg = get_irn_dbg_info(call);
297 if (mode_is_signed(get_irn_mode(op))) {
298 ir_mode *mode = get_irn_mode(op);
299 mode = find_unsigned_mode(mode);
301 panic("Cannot find unsigned mode for %M", mode);
303 op = new_rd_Conv(dbg, block, op, mode);
306 irn = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
307 mem = new_rd_Proj(dbg, irn, mode_M, pn_Alloc_M);
308 no_exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_regular);
309 exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_except);
310 irn = new_rd_Proj(dbg, irn, get_modeP_data(), pn_Alloc_res);
312 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
313 replace_call(irn, call, mem, no_exc, exc);
315 } /* i_mapper_alloca */
317 /* A mapper for the floating point sqrt. */
318 int i_mapper_sqrt(ir_node *call, void *ctx)
322 ir_node *op = get_Call_param(call, 0);
328 tv = get_Const_tarval(op);
329 if (! tarval_is_null(tv) && !tarval_is_one(tv))
332 mem = get_Call_mem(call);
334 /* sqrt(0) = 0, sqrt(1) = 1 */
335 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
336 replace_call(op, call, mem, NULL, NULL);
338 } /* i_mapper_sqrt */
340 /* A mapper for the floating point cbrt. */
341 int i_mapper_cbrt(ir_node *call, void *ctx)
345 ir_node *op = get_Call_param(call, 0);
351 tv = get_Const_tarval(op);
352 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
355 mem = get_Call_mem(call);
357 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
358 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
359 replace_call(op, call, mem, NULL, NULL);
361 } /* i_mapper_cbrt */
363 /* A mapper for the floating point pow. */
364 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 *irn, *reg_jmp = NULL, *exc_jmp = NULL;
375 if (is_Const(left) && is_Const_one(left)) {
376 /* pow (1.0, x) = 1.0 */
378 } else if (is_Const(right)) {
379 ir_tarval *tv = get_Const_tarval(right);
380 if (tarval_is_null(tv)) {
381 /* pow(x, 0.0) = 1.0 */
382 ir_mode *mode = get_tarval_mode(tv);
383 irn = new_r_Const(irg, get_mode_one(mode));
384 } else if (tarval_is_one(tv)) {
385 /* pow(x, 1.0) = x */
387 } else if (tarval_is_minus_one(tv)) {
388 /* pow(x, -1.0) = 1/x */
396 mem = get_Call_mem(call);
397 dbg = get_irn_dbg_info(call);
400 ir_mode *mode = get_irn_mode(left);
403 irn = new_r_Const(irg, get_mode_one(mode));
404 quot = new_rd_Quot(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
405 mem = new_r_Proj(quot, mode_M, pn_Quot_M);
406 irn = new_r_Proj(quot, mode, pn_Quot_res);
407 reg_jmp = new_r_Proj(quot, mode_X, pn_Quot_X_regular);
408 exc_jmp = new_r_Proj(quot, mode_X, pn_Quot_X_except);
410 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
411 replace_call(irn, call, mem, reg_jmp, exc_jmp);
415 /* A mapper for the floating point exp. */
416 int i_mapper_exp(ir_node *call, void *ctx)
418 ir_node *val = get_Call_param(call, 0);
421 if (is_Const(val) && is_Const_null(val)) {
423 ir_graph *irg = get_irn_irg(val);
424 ir_mode *mode = get_irn_mode(val);
425 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
426 ir_node *mem = get_Call_mem(call);
427 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
428 replace_call(irn, call, mem, NULL, NULL);
435 * A mapper for mapping f(0.0) to 0.0.
437 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
439 ir_node *val = get_Call_param(call, 0);
442 if (is_Const(val) && is_Const_null(val)) {
444 ir_node *mem = get_Call_mem(call);
445 DBG_OPT_ALGSIM0(call, val, reason);
446 replace_call(val, call, mem, NULL, NULL);
450 } /* i_mapper_zero_to_zero */
453 * A mapper for mapping f(1.0) to 0.0.
455 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
457 ir_node *val = get_Call_param(call, 0);
460 if (is_Const(val) && is_Const_one(val)) {
461 /* acos(1.0) = 0.0 */
462 ir_graph *irg = get_irn_irg(val);
463 ir_mode *mode = get_irn_mode(val);
464 ir_node *irn = new_r_Const(irg, get_mode_null(mode));
465 ir_node *mem = get_Call_mem(call);
466 DBG_OPT_ALGSIM0(call, irn, reason);
467 replace_call(irn, call, mem, NULL, NULL);
471 } /* i_mapper_one_to_zero */
474 * A mapper for mapping a functions with the following characteristics:
478 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
480 ir_node *val = get_Call_param(call, 0);
483 if (is_strictConv(val)) {
484 ir_node *op = get_Conv_op(val);
486 /* f(-x) = f(x) with strictConv */
487 ir_node *block = get_nodes_block(call);
488 ir_mode *mode = get_irn_mode(val);
489 dbg_info *dbg = get_irn_dbg_info(val);
491 op = get_Minus_op(op);
492 val = new_rd_Conv(dbg, block, op, mode);
495 set_Conv_strict(val, 1);
497 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
498 set_Call_param(call, 0, val);
500 } else if (is_Minus(val)) {
502 val = get_Minus_op(val);
503 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
504 set_Call_param(call, 0, val);
507 if (is_Const(val) && is_Const_null(val)) {
509 ir_graph *irg = get_irn_irg(val);
510 ir_mode *mode = get_irn_mode(val);
511 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
512 ir_node *mem = get_Call_mem(call);
513 DBG_OPT_ALGSIM0(call, irn, reason);
514 replace_call(irn, call, mem, NULL, NULL);
518 } /* i_mapper_symmetric_zero_to_one */
520 /* A mapper for the floating point log. */
521 int i_mapper_log(ir_node *call, void *ctx)
524 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
527 /* A mapper for the floating point sin. */
528 int i_mapper_sin(ir_node *call, void *ctx)
531 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
534 /* A mapper for the floating point cos. */
535 int i_mapper_cos(ir_node *call, void *ctx)
537 /* cos(0.0) = 1.0, cos(-x) = x */
538 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
541 /* A mapper for the floating point tan. */
542 int i_mapper_tan(ir_node *call, void *ctx)
545 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
548 /* A mapper for the floating point asin. */
549 int i_mapper_asin(ir_node *call, void *ctx)
551 /* asin(0.0) = 0.0 */
552 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
553 } /* i_mapper_asin */
555 /* A mapper for the floating point acos. */
556 int i_mapper_acos(ir_node *call, void *ctx)
558 /* acos(1.0) = 0.0 */
559 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
560 } /* i_mapper_acos */
562 /* A mapper for the floating point atan. */
563 int i_mapper_atan(ir_node *call, void *ctx)
565 /* atan(0.0) = 0.0 */
566 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
567 } /* i_mapper_atan */
569 /* A mapper for the floating point sinh. */
570 int i_mapper_sinh(ir_node *call, void *ctx)
572 /* sinh(0.0) = 0.0 */
573 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
574 } /* i_mapper_sinh */
576 /* A mapper for the floating point cosh. */
577 int i_mapper_cosh(ir_node *call, void *ctx)
579 /* cosh(0.0) = 1.0, cosh(-x) = x */
580 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
581 } /* i_mapper_cosh */
583 /* A mapper for the floating point tanh. */
584 int i_mapper_tanh(ir_node *call, void *ctx)
586 /* tanh(0.0) = 0.0 */
587 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
588 } /* i_mapper_tanh */
591 * Return the const entity that is accessed through the pointer ptr or
592 * NULL if there is no entity (or the entity is not constant).
594 * @param ptr the pointer
596 static ir_entity *get_const_entity(ir_node *ptr)
598 if (is_Global(ptr)) {
599 ir_entity *ent = get_Global_entity(ptr);
601 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
602 /* a constant entity */
607 } /* get_const_entity */
609 static bool initializer_val_is_null(ir_initializer_t *init)
613 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
616 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
617 tv = get_initializer_tarval_value(init);
618 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
619 ir_node *irn = get_initializer_const_value(init);
622 tv = get_Const_tarval(irn);
627 return tarval_is_null(tv);
631 * Calculate the value of strlen if possible.
633 * @param ent the entity
634 * @param res_tp the result type
636 * @return a Const node containing the strlen() result or NULL
637 * if the evaluation fails
639 static ir_node *eval_strlen(ir_graph *irg, ir_entity *ent, ir_type *res_tp)
641 ir_type *tp = get_entity_type(ent);
643 ir_initializer_t *initializer;
647 if (! is_Array_type(tp))
649 tp = get_array_element_type(tp);
650 if (! is_Primitive_type(tp))
652 mode = get_type_mode(tp);
654 /* FIXME: This is too restrict, as the type char might be more the 8bits */
655 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
658 if (!has_entity_initializer(ent)) {
663 n = get_compound_ent_n_values(ent);
664 for (i = 0; i < n; ++i) {
665 ir_node *irn = get_compound_ent_value(ent, i);
670 if (is_Const_null(irn)) {
671 /* found the length */
677 ir_tarval *tv = new_tarval_from_long(len, get_type_mode(res_tp));
678 return new_r_Const(irg, tv);
683 initializer = get_entity_initializer(ent);
684 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
687 size = get_initializer_compound_n_entries(initializer);
688 for (i = 0; i < size; ++i) {
689 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
690 if (initializer_val_is_null(val)) {
691 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
692 return new_r_Const(irg, tv);
699 /* A mapper for strlen */
700 int i_mapper_strlen(ir_node *call, void *ctx)
702 ir_node *s = get_Call_param(call, 0);
703 ir_entity *ent = get_const_entity(s);
707 /* FIXME: this cannot handle constant strings inside struct initializers yet */
709 /* a constant entity */
710 ir_type *tp = get_Call_type(call);
713 tp = get_method_res_type(tp, 0);
714 irn = eval_strlen(get_irn_irg(call), ent, tp);
717 ir_node *mem = get_Call_mem(call);
718 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
719 replace_call(irn, call, mem, NULL, NULL);
724 } /* i_mapper_strlen */
727 * Calculate the value of strlen if possible.
729 * @param left the left entity
730 * @param right the right entity
731 * @param res_tp the result type
733 * @return a Const node containing the strcmp() result or NULL
734 * if the evaluation fails
736 static ir_node *eval_strcmp(ir_graph *irg, ir_entity *left, ir_entity *right,
743 tp = get_entity_type(left);
744 if (! is_Array_type(tp))
746 tp = get_array_element_type(tp);
747 if (! is_Primitive_type(tp))
749 mode = get_type_mode(tp);
751 /* FIXME: This is too restrict, as the type char might be more the 8bits */
752 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
755 tp = get_entity_type(right);
756 if (! is_Array_type(tp))
758 tp = get_array_element_type(tp);
759 if (! is_Primitive_type(tp))
761 mode = get_type_mode(tp);
763 /* FIXME: This is too restrict, as the type char might be more the 8bits */
764 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
767 if (!has_entity_initializer(left) && !has_entity_initializer(right)) {
768 /* code that uses deprecated compound_graph_path stuff */
770 n = get_compound_ent_n_values(left);
771 n_r = get_compound_ent_n_values(right);
775 for (i = 0; i < n; ++i) {
780 irn = get_compound_ent_value(left, i);
783 tv = get_Const_tarval(irn);
784 v_l = get_tarval_long(tv);
786 irn = get_compound_ent_value(right, i);
789 tv = get_Const_tarval(irn);
790 v_r = get_tarval_long(tv);
807 /* we found an end */
808 ir_tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
809 return new_r_Const(irg, tv);
820 * Checks if an entity represents the empty string.
822 * @param ent the entity
824 * @return non-zero if ent represents the empty string
826 static int is_empty_string(ir_entity *ent)
828 ir_type *tp = get_entity_type(ent);
831 ir_initializer_t *initializer;
832 ir_initializer_t *init0;
834 if (! is_Array_type(tp))
836 tp = get_array_element_type(tp);
837 if (! is_Primitive_type(tp))
839 mode = get_type_mode(tp);
841 /* FIXME: This is too restrict, as the type char might be more the 8bits */
842 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
845 if (!has_entity_initializer(ent)) {
846 /* code for deprecated compound_graph_path stuff */
847 int n = get_compound_ent_n_values(ent);
850 irn = get_compound_ent_value(ent, 0);
852 return is_Const(irn) && is_Const_null(irn);
855 initializer = get_entity_initializer(ent);
856 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
859 if (get_initializer_compound_n_entries(initializer) < 1)
862 init0 = get_initializer_compound_value(initializer, 0);
863 return initializer_val_is_null(init0);
864 } /* is_empty_string */
866 /* A mapper for strcmp */
867 int i_mapper_strcmp(ir_node *call, void *ctx)
869 ir_node *left = get_Call_param(call, 0);
870 ir_node *right = get_Call_param(call, 1);
874 ir_type *call_tp = get_Call_type(call);
875 ir_type *res_tp = get_method_res_type(call_tp, 0);
876 ir_entity *ent_l, *ent_r;
882 /* do some type checks first */
883 if (! is_Primitive_type(res_tp))
885 char_tp = get_method_param_type(call_tp, 0);
886 if (char_tp != get_method_param_type(call_tp, 1))
888 if (! is_Pointer_type(char_tp))
890 char_tp = get_pointer_points_to_type(char_tp);
893 /* a strcmp(s, s) ==> 0 */
894 ir_graph *irg = get_irn_irg(call);
895 ir_node *mem = get_Call_mem(call);
896 ir_mode *mode = get_type_mode(res_tp);
898 irn = new_r_Const(irg, get_mode_null(mode));
899 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
900 replace_call(irn, call, mem, NULL, NULL);
903 ent_l = get_const_entity(left);
904 ent_r = get_const_entity(right);
906 if (ent_l != NULL && ent_r != NULL) {
907 /* both entities are const, try to evaluate */
908 irn = eval_strcmp(get_irn_irg(call), ent_l, ent_r, res_tp);
909 } else if (ent_l != NULL) {
910 if (is_empty_string(ent_l)) {
911 /* s strcmp("", s) ==> -(*s)*/
913 goto replace_by_call;
915 } else if (ent_r != NULL) {
916 if (is_empty_string(ent_r)) {
917 /* s strcmp(s, "") ==> (*s) */
918 ir_node *mem, *block;
924 mem = get_Call_mem(call);
925 block = get_nodes_block(call);
926 dbg = get_irn_dbg_info(call);
927 mode = get_type_mode(char_tp);
929 /* replace the strcmp by (*x) */
930 irn = new_rd_Load(dbg, block, mem, v, mode, cons_none);
931 mem = new_r_Proj(irn, mode_M, pn_Load_M);
932 exc = new_r_Proj(irn, mode_X, pn_Load_X_except);
933 reg = new_r_Proj(irn, mode_X, pn_Load_X_regular);
934 irn = new_r_Proj(irn, mode, pn_Load_res);
936 /* conv to the result mode */
937 mode = get_type_mode(res_tp);
938 irn = new_rd_Conv(dbg, block, irn, mode);
941 /* negate in the ("", s) case */
942 irn = new_rd_Minus(dbg, block, irn, mode);
948 ir_node *mem = get_Call_mem(call);
949 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
950 replace_call(irn, call, mem, reg, exc);
955 } /* i_mapper_strcmp */
957 /* A mapper for strncmp */
958 int i_mapper_strncmp(ir_node *call, void *ctx)
960 ir_node *left = get_Call_param(call, 0);
961 ir_node *right = get_Call_param(call, 1);
962 ir_node *len = get_Call_param(call, 2);
966 if (left == right || (is_Const(len) && is_Const_null(len))) {
967 /* a strncmp(s, s, len) ==> 0 OR
968 a strncmp(a, b, 0) ==> 0 */
969 ir_graph *irg = get_irn_irg(call);
970 ir_node *mem = get_Call_mem(call);
971 ir_node *adr = get_Call_ptr(call);
972 ir_entity *ent = get_SymConst_entity(adr);
973 ir_type *call_tp = get_entity_type(ent);
974 ir_type *res_tp = get_method_res_type(call_tp, 0);
975 ir_mode *mode = get_type_mode(res_tp);
977 irn = new_r_Const(irg, get_mode_null(mode));
978 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
979 replace_call(irn, call, mem, NULL, NULL);
983 } /* i_mapper_strncmp */
985 /* A mapper for strcpy */
986 int i_mapper_strcpy(ir_node *call, void *ctx)
988 ir_node *dst = get_Call_param(call, 0);
989 ir_node *src = get_Call_param(call, 1);
993 /* a strcpy(d, s) ==> d */
994 ir_node *mem = get_Call_mem(call);
995 ir_node *dst = get_Call_param(call, 0);
997 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
998 replace_call(dst, call, mem, NULL, NULL);
1002 } /* i_mapper_strcpy */
1004 /* A mapper for memcpy */
1005 int i_mapper_memcpy(ir_node *call, void *ctx)
1007 ir_node *dst = get_Call_param(call, 0);
1008 ir_node *src = get_Call_param(call, 1);
1009 ir_node *len = get_Call_param(call, 2);
1012 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1013 /* a memcpy(d, d, len) ==> d OR
1014 a memcpy(d, s, 0) ==> d */
1015 ir_node *mem = get_Call_mem(call);
1017 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
1018 replace_call(dst, call, mem, NULL, NULL);
1022 } /* i_mapper_memcpy */
1024 /* A mapper for mempcpy */
1025 int i_mapper_mempcpy(ir_node *call, void *ctx)
1027 ir_node *dst = get_Call_param(call, 0);
1028 ir_node *src = get_Call_param(call, 1);
1029 ir_node *len = get_Call_param(call, 2);
1032 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1033 /* a memcpy(d, d, len) ==> d + len OR
1034 a memcpy(d, s, 0) ==> d + 0 */
1035 dbg_info *dbg = get_irn_dbg_info(call);
1036 ir_node *mem = get_Call_mem(call);
1037 ir_node *blk = get_nodes_block(call);
1038 ir_mode *mode = get_irn_mode(dst);
1039 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
1041 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
1042 replace_call(res, call, mem, NULL, NULL);
1046 } /* i_mapper_mempcpy */
1048 /* A mapper for memmove */
1049 int i_mapper_memmove(ir_node *call, void *ctx)
1051 ir_node *dst = get_Call_param(call, 0);
1052 ir_node *src = get_Call_param(call, 1);
1053 ir_node *len = get_Call_param(call, 2);
1056 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1057 /* a memmove(d, d, len) ==> d OR
1058 a memmove(d, s, 0) ==> d */
1059 ir_node *mem = get_Call_mem(call);
1061 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
1062 replace_call(dst, call, mem, NULL, NULL);
1066 } /* i_mapper_memmove */
1068 /* A mapper for memset */
1069 int i_mapper_memset(ir_node *call, void *ctx)
1071 ir_node *len = get_Call_param(call, 2);
1074 if (is_Const(len) && is_Const_null(len)) {
1075 /* a memset(d, C, 0) ==> d */
1076 ir_node *mem = get_Call_mem(call);
1077 ir_node *dst = get_Call_param(call, 0);
1079 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
1080 replace_call(dst, call, mem, NULL, NULL);
1084 } /* i_mapper_memset */
1086 /* A mapper for memcmp */
1087 int i_mapper_memcmp(ir_node *call, void *ctx)
1089 ir_node *left = get_Call_param(call, 0);
1090 ir_node *right = get_Call_param(call, 1);
1091 ir_node *len = get_Call_param(call, 2);
1095 if (left == right || (is_Const(len) && is_Const_null(len))) {
1096 /* a memcmp(s, s, len) ==> 0 OR
1097 a memcmp(a, b, 0) ==> 0 */
1098 ir_graph *irg = get_irn_irg(call);
1099 ir_node *mem = get_Call_mem(call);
1100 ir_node *adr = get_Call_ptr(call);
1101 ir_entity *ent = get_SymConst_entity(adr);
1102 ir_type *call_tp = get_entity_type(ent);
1103 ir_type *res_tp = get_method_res_type(call_tp, 0);
1104 ir_mode *mode = get_type_mode(res_tp);
1106 irn = new_r_Const(irg, get_mode_null(mode));
1107 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1108 replace_call(irn, call, mem, NULL, NULL);
1112 } /* i_mapper_memcmp */
1115 * Returns the result mode of a node.
1117 static ir_mode *get_irn_res_mode(ir_node *node)
1119 switch (get_irn_opcode(node)) {
1120 case iro_Load: return get_Load_mode(node);
1121 case iro_Quot: return get_Quot_resmode(node);
1122 case iro_Div: return get_Div_resmode(node);
1123 case iro_Mod: return get_Mod_resmode(node);
1124 case iro_DivMod: return get_DivMod_resmode(node);
1125 default: return NULL;
1127 } /* get_irn_res_mode */
1129 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
1131 /* A mapper for mapping unsupported instructions to runtime calls. */
1132 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt)
1134 int i, j, arity, first, n_param, n_res;
1137 ir_node *mem, *bl, *call, *addr, *res_proj;
1140 symconst_symbol sym;
1141 ir_mode *mode = get_irn_mode(node);
1143 if (mode != rt->mode)
1145 /* check if the result modes match */
1146 if (mode == mode_T && rt->res_mode != NULL) {
1147 mode = get_irn_res_mode(node);
1148 if (mode != rt->res_mode)
1152 arity = get_irn_arity(node);
1156 mtp = get_entity_type(rt->ent);
1157 n_param = get_method_n_params(mtp);
1158 irg = current_ir_graph;
1160 mem = get_irn_n(node, 0);
1161 if (get_irn_mode(mem) != mode_M) {
1162 mem = new_r_NoMem(irg);
1167 /* check if the modes of the predecessors match the parameter modes */
1168 if (arity - first != n_param)
1171 for (i = first, j = 0; i < arity; ++i, ++j) {
1172 ir_type *param_tp = get_method_param_type(mtp, j);
1173 ir_node *pred = get_irn_n(node, i);
1175 if (get_type_mode(param_tp) != get_irn_mode(pred))
1179 n_res = get_method_n_ress(mtp);
1181 /* step 0: calculate the number of needed Proj's */
1183 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
1184 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1185 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1186 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
1187 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
1190 if (rt->mode != mode_T) /* must be mode_T */
1195 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1199 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1200 bl = get_nodes_block(node);
1204 NEW_ARR_A(ir_node *, in, n_param);
1205 for (i = 0; i < n_param; ++i)
1206 in[i] = get_irn_n(node, first + i);
1209 /* step 1: create the call */
1210 sym.entity_p = rt->ent;
1211 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1212 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1213 set_irn_pinned(call, get_irn_pinned(node));
1216 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1221 n_proj += n_res - 1;
1224 turn_into_tuple(node, n_proj);
1226 for (i = 0; i < n_proj; ++i)
1227 set_Tuple_pred(node, i, new_r_Bad(irg));
1228 if (rt->mem_proj_nr >= 0)
1229 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1230 if (!is_NoMem(mem)) {
1231 /* Exceptions can only be handled with real memory */
1232 if (rt->regular_proj_nr >= 0)
1233 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_regular));
1234 if (rt->exc_proj_nr >= 0)
1235 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_except));
1236 if (rt->exc_mem_proj_nr >= 0)
1237 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1240 if (rt->res_proj_nr >= 0)
1241 for (i = 0; i < n_res; ++i)
1242 set_Tuple_pred(node, rt->res_proj_nr + i,
1243 new_r_Proj(res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
1246 /* only one return value supported */
1248 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1250 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1251 res_proj = new_r_Proj(res_proj, mode, 0);
1253 exchange(node, res_proj);
1257 /* should not happen */
1259 } /* i_mapper_RuntimeCall */