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_outs_inconsistent(irg);
143 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
145 /* Exception control flow might have changed / new block might have added. */
146 set_irg_doms_inconsistent(irg);
147 set_irg_extblk_inconsistent(irg);
148 set_irg_loopinfo_inconsistent(irg);
150 /* Calls might be removed/added. */
151 set_trouts_inconsistent();
154 irg_verify(irg, VERIFY_NORMAL);
156 /* Optimize it, tuple might be created. */
157 optimize_graph_df(irg);
159 nr_of_intrinsics += wenv.nr_of_intrinsics;
164 return nr_of_intrinsics;
165 } /* lower_intrinsics */
167 typedef struct pass_t {
176 * Wrapper for running lower_intrinsics() as an ir_prog pass.
178 static int pass_wrapper(ir_prog *irp, void *context)
180 pass_t *pass = (pass_t*)context;
181 (void) irp; /* TODO: set current irp, or remove parameter */
182 lower_intrinsics(pass->list, pass->length, pass->part_block_used);
183 /* probably this pass should not run again */
188 * Creates an ir_prog pass for lower_intrinsics.
190 * @param name the name of this pass or NULL
191 * @param list an array of intrinsic map records
192 * @param length the length of the array
193 * @param part_block_used set to true if part_block() must be using during lowering
195 ir_prog_pass_t *lower_intrinsics_pass(
197 i_record *list, size_t length, int part_block_used)
199 pass_t *pass = (pass_t*)xmalloc(sizeof(*pass) + (length-1) * sizeof(pass->list[0]));
201 memcpy(pass->list, list, sizeof(list[0]) * length);
202 pass->length = length;
203 pass->part_block_used = part_block_used;
205 return def_prog_pass_constructor(
206 &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
207 } /* lower_intrinsics_pass*/
210 * Helper function, replace the call by the given node.
212 * @param irn the result node
213 * @param call the call to replace
214 * @param mem the new mem result
215 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
216 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
218 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem, ir_node *reg_jmp, ir_node *exc_jmp)
220 ir_node *block = get_nodes_block(call);
221 ir_graph *irg = get_irn_irg(block);
223 if (reg_jmp == NULL) {
225 /* Beware: do we need here a protection against CSE? Better we do it. */
226 int old_cse = get_opt_cse();
228 reg_jmp = new_r_Jmp(block);
229 set_opt_cse(old_cse);
230 exc_jmp = new_r_Bad(irg);
232 irn = new_r_Tuple(block, 1, &irn);
234 turn_into_tuple(call, pn_Call_max);
235 set_Tuple_pred(call, pn_Call_M, mem);
236 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
237 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
238 set_Tuple_pred(call, pn_Call_T_result, irn);
241 /* A mapper for the integer abs. */
242 int i_mapper_abs(ir_node *call, void *ctx)
244 ir_node *mem = get_Call_mem(call);
245 ir_node *block = get_nodes_block(call);
246 ir_node *op = get_Call_param(call, 0);
247 ir_graph *irg = get_irn_irg(call);
248 ir_mode *mode = get_irn_mode(op);
249 dbg_info *dbg = get_irn_dbg_info(call);
250 ir_node *zero = new_r_Const(irg, get_mode_null(mode));
251 ir_node *cmp = new_rd_Cmp(dbg, block, op, zero, ir_relation_less);
252 ir_node *minus_op = new_rd_Minus(dbg, block, op, mode);
254 arch_allow_ifconv_func allow_ifconv = be_get_backend_param()->allow_ifconv;
257 /* mux allowed by backend? */
258 if (!allow_ifconv(cmp, op, minus_op))
262 mux = new_rd_Mux(dbg, block, cmp, op, minus_op, mode);
263 DBG_OPT_ALGSIM0(call, mux, FS_OPT_RTS_ABS);
264 replace_call(mux, call, mem, NULL, NULL);
268 /* A mapper for the integer bswap. */
269 int i_mapper_bswap(ir_node *call, void *ctx)
271 ir_node *mem = get_Call_mem(call);
272 ir_node *block = get_nodes_block(call);
273 ir_node *op = get_Call_param(call, 0);
274 ir_type *tp = get_Call_type(call);
275 dbg_info *dbg = get_irn_dbg_info(call);
279 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
280 set_irn_pinned(irn, op_pin_state_floats);
281 irn = new_r_Proj(irn, get_irn_mode(op), pn_Builtin_1_result);
282 replace_call(irn, call, mem, NULL, NULL);
284 } /* i_mapper_bswap */
286 /* A mapper for the alloca() function. */
287 int i_mapper_alloca(ir_node *call, void *ctx)
289 ir_node *mem = get_Call_mem(call);
290 ir_node *block = get_nodes_block(call);
291 ir_node *op = get_Call_param(call, 0);
292 ir_node *irn, *exc, *no_exc;
293 dbg_info *dbg = get_irn_dbg_info(call);
296 if (mode_is_signed(get_irn_mode(op))) {
297 ir_mode *mode = get_irn_mode(op);
298 mode = find_unsigned_mode(mode);
300 panic("Cannot find unsigned mode for %M", mode);
302 op = new_rd_Conv(dbg, block, op, mode);
305 irn = new_rd_Alloc(dbg, block, mem, op, firm_unknown_type, stack_alloc);
306 mem = new_rd_Proj(dbg, irn, mode_M, pn_Alloc_M);
307 no_exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_regular);
308 exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_except);
309 irn = new_rd_Proj(dbg, irn, get_modeP_data(), pn_Alloc_res);
311 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
312 replace_call(irn, call, mem, no_exc, exc);
314 } /* i_mapper_alloca */
316 /* A mapper for the floating point sqrt. */
317 int i_mapper_sqrt(ir_node *call, void *ctx)
321 ir_node *op = get_Call_param(call, 0);
327 tv = get_Const_tarval(op);
328 if (! tarval_is_null(tv) && !tarval_is_one(tv))
331 mem = get_Call_mem(call);
333 /* sqrt(0) = 0, sqrt(1) = 1 */
334 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
335 replace_call(op, call, mem, NULL, NULL);
337 } /* i_mapper_sqrt */
339 /* A mapper for the floating point cbrt. */
340 int i_mapper_cbrt(ir_node *call, void *ctx)
344 ir_node *op = get_Call_param(call, 0);
350 tv = get_Const_tarval(op);
351 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
354 mem = get_Call_mem(call);
356 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
357 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
358 replace_call(op, call, mem, NULL, NULL);
360 } /* i_mapper_cbrt */
362 /* A mapper for the floating point pow. */
363 int i_mapper_pow(ir_node *call, void *ctx)
367 ir_node *left = get_Call_param(call, 0);
368 ir_node *right = get_Call_param(call, 1);
369 ir_node *block = get_nodes_block(call);
370 ir_graph *irg = get_irn_irg(block);
371 ir_node *irn, *reg_jmp = NULL, *exc_jmp = NULL;
374 if (is_Const(left) && is_Const_one(left)) {
375 /* pow (1.0, x) = 1.0 */
377 } else if (is_Const(right)) {
378 ir_tarval *tv = get_Const_tarval(right);
379 if (tarval_is_null(tv)) {
380 /* pow(x, 0.0) = 1.0 */
381 ir_mode *mode = get_tarval_mode(tv);
382 irn = new_r_Const(irg, get_mode_one(mode));
383 } else if (tarval_is_one(tv)) {
384 /* pow(x, 1.0) = x */
386 } else if (tarval_is_minus_one(tv)) {
387 /* pow(x, -1.0) = 1/x */
395 mem = get_Call_mem(call);
396 dbg = get_irn_dbg_info(call);
399 ir_mode *mode = get_irn_mode(left);
402 irn = new_r_Const(irg, get_mode_one(mode));
403 div = new_rd_Div(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
404 mem = new_r_Proj(div, mode_M, pn_Div_M);
405 irn = new_r_Proj(div, mode, pn_Div_res);
406 reg_jmp = new_r_Proj(div, mode_X, pn_Div_X_regular);
407 exc_jmp = new_r_Proj(div, mode_X, pn_Div_X_except);
409 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
410 replace_call(irn, call, mem, reg_jmp, exc_jmp);
414 /* A mapper for the floating point exp. */
415 int i_mapper_exp(ir_node *call, void *ctx)
417 ir_node *val = get_Call_param(call, 0);
420 if (is_Const(val) && is_Const_null(val)) {
422 ir_graph *irg = get_irn_irg(val);
423 ir_mode *mode = get_irn_mode(val);
424 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
425 ir_node *mem = get_Call_mem(call);
426 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
427 replace_call(irn, call, mem, NULL, NULL);
434 * A mapper for mapping f(0.0) to 0.0.
436 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
438 ir_node *val = get_Call_param(call, 0);
441 if (is_Const(val) && is_Const_null(val)) {
443 ir_node *mem = get_Call_mem(call);
444 DBG_OPT_ALGSIM0(call, val, reason);
445 replace_call(val, call, mem, NULL, NULL);
449 } /* i_mapper_zero_to_zero */
452 * A mapper for mapping f(1.0) to 0.0.
454 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
456 ir_node *val = get_Call_param(call, 0);
459 if (is_Const(val) && is_Const_one(val)) {
460 /* acos(1.0) = 0.0 */
461 ir_graph *irg = get_irn_irg(val);
462 ir_mode *mode = get_irn_mode(val);
463 ir_node *irn = new_r_Const(irg, get_mode_null(mode));
464 ir_node *mem = get_Call_mem(call);
465 DBG_OPT_ALGSIM0(call, irn, reason);
466 replace_call(irn, call, mem, NULL, NULL);
470 } /* i_mapper_one_to_zero */
473 * A mapper for mapping a functions with the following characteristics:
477 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
479 ir_node *val = get_Call_param(call, 0);
482 if (is_strictConv(val)) {
483 ir_node *op = get_Conv_op(val);
485 /* f(-x) = f(x) with strictConv */
486 ir_node *block = get_nodes_block(call);
487 ir_mode *mode = get_irn_mode(val);
488 dbg_info *dbg = get_irn_dbg_info(val);
490 op = get_Minus_op(op);
491 val = new_rd_Conv(dbg, block, op, mode);
494 set_Conv_strict(val, 1);
496 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
497 set_Call_param(call, 0, val);
499 } else if (is_Minus(val)) {
501 val = get_Minus_op(val);
502 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
503 set_Call_param(call, 0, val);
506 if (is_Const(val) && is_Const_null(val)) {
508 ir_graph *irg = get_irn_irg(val);
509 ir_mode *mode = get_irn_mode(val);
510 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
511 ir_node *mem = get_Call_mem(call);
512 DBG_OPT_ALGSIM0(call, irn, reason);
513 replace_call(irn, call, mem, NULL, NULL);
517 } /* i_mapper_symmetric_zero_to_one */
519 /* A mapper for the floating point log. */
520 int i_mapper_log(ir_node *call, void *ctx)
523 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
526 /* A mapper for the floating point sin. */
527 int i_mapper_sin(ir_node *call, void *ctx)
530 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
533 /* A mapper for the floating point cos. */
534 int i_mapper_cos(ir_node *call, void *ctx)
536 /* cos(0.0) = 1.0, cos(-x) = x */
537 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
540 /* A mapper for the floating point tan. */
541 int i_mapper_tan(ir_node *call, void *ctx)
544 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
547 /* A mapper for the floating point asin. */
548 int i_mapper_asin(ir_node *call, void *ctx)
550 /* asin(0.0) = 0.0 */
551 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
552 } /* i_mapper_asin */
554 /* A mapper for the floating point acos. */
555 int i_mapper_acos(ir_node *call, void *ctx)
557 /* acos(1.0) = 0.0 */
558 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
559 } /* i_mapper_acos */
561 /* A mapper for the floating point atan. */
562 int i_mapper_atan(ir_node *call, void *ctx)
564 /* atan(0.0) = 0.0 */
565 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
566 } /* i_mapper_atan */
568 /* A mapper for the floating point sinh. */
569 int i_mapper_sinh(ir_node *call, void *ctx)
571 /* sinh(0.0) = 0.0 */
572 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
573 } /* i_mapper_sinh */
575 /* A mapper for the floating point cosh. */
576 int i_mapper_cosh(ir_node *call, void *ctx)
578 /* cosh(0.0) = 1.0, cosh(-x) = x */
579 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
580 } /* i_mapper_cosh */
582 /* A mapper for the floating point tanh. */
583 int i_mapper_tanh(ir_node *call, void *ctx)
585 /* tanh(0.0) = 0.0 */
586 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
587 } /* i_mapper_tanh */
590 * Return the const entity that is accessed through the pointer ptr or
591 * NULL if there is no entity (or the entity is not constant).
593 * @param ptr the pointer
595 static ir_entity *get_const_entity(ir_node *ptr)
597 if (is_Global(ptr)) {
598 ir_entity *ent = get_Global_entity(ptr);
600 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
601 /* a constant entity */
606 } /* get_const_entity */
608 static bool initializer_val_is_null(ir_initializer_t *init)
612 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
615 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
616 tv = get_initializer_tarval_value(init);
617 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
618 ir_node *irn = get_initializer_const_value(init);
621 tv = get_Const_tarval(irn);
626 return tarval_is_null(tv);
630 * Calculate the value of strlen if possible.
632 * @param ent the entity
633 * @param res_tp the result type
635 * @return a Const node containing the strlen() result or NULL
636 * if the evaluation fails
638 static ir_node *eval_strlen(ir_graph *irg, ir_entity *ent, ir_type *res_tp)
640 ir_type *tp = get_entity_type(ent);
642 ir_initializer_t *initializer;
646 if (! is_Array_type(tp))
648 tp = get_array_element_type(tp);
649 if (! is_Primitive_type(tp))
651 mode = get_type_mode(tp);
653 /* FIXME: This is too restrict, as the type char might be more the 8bits */
654 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
657 if (!has_entity_initializer(ent)) {
660 n = get_compound_ent_n_values(ent);
661 for (i = 0; i < n; ++i) {
662 ir_node *irn = get_compound_ent_value(ent, i);
667 if (is_Const_null(irn)) {
668 /* found the length */
669 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
670 return new_r_Const(irg, tv);
676 initializer = get_entity_initializer(ent);
677 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
680 size = get_initializer_compound_n_entries(initializer);
681 for (i = 0; i < size; ++i) {
682 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
683 if (initializer_val_is_null(val)) {
684 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
685 return new_r_Const(irg, tv);
692 /* A mapper for strlen */
693 int i_mapper_strlen(ir_node *call, void *ctx)
695 ir_node *s = get_Call_param(call, 0);
696 ir_entity *ent = get_const_entity(s);
700 /* FIXME: this cannot handle constant strings inside struct initializers yet */
702 /* a constant entity */
703 ir_type *tp = get_Call_type(call);
706 tp = get_method_res_type(tp, 0);
707 irn = eval_strlen(get_irn_irg(call), ent, tp);
710 ir_node *mem = get_Call_mem(call);
711 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
712 replace_call(irn, call, mem, NULL, NULL);
717 } /* i_mapper_strlen */
720 * Calculate the value of strlen if possible.
722 * @param left the left entity
723 * @param right the right entity
724 * @param res_tp the result type
726 * @return a Const node containing the strcmp() result or NULL
727 * if the evaluation fails
729 static ir_node *eval_strcmp(ir_graph *irg, ir_entity *left, ir_entity *right,
735 tp = get_entity_type(left);
736 if (! is_Array_type(tp))
738 tp = get_array_element_type(tp);
739 if (! is_Primitive_type(tp))
741 mode = get_type_mode(tp);
743 /* FIXME: This is too restrict, as the type char might be more the 8bits */
744 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
747 tp = get_entity_type(right);
748 if (! is_Array_type(tp))
750 tp = get_array_element_type(tp);
751 if (! is_Primitive_type(tp))
753 mode = get_type_mode(tp);
755 /* FIXME: This is too restrict, as the type char might be more the 8bits */
756 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
759 if (!has_entity_initializer(left) && !has_entity_initializer(right)) {
760 /* code that uses deprecated compound_graph_path stuff */
761 size_t n = get_compound_ent_n_values(left);
762 size_t n_r = get_compound_ent_n_values(right);
768 for (i = 0; i < n; ++i) {
773 irn = get_compound_ent_value(left, i);
776 tv = get_Const_tarval(irn);
777 v_l = get_tarval_long(tv);
779 irn = get_compound_ent_value(right, i);
782 tv = get_Const_tarval(irn);
783 v_r = get_tarval_long(tv);
800 /* we found an end */
801 ir_tarval *tv = new_tarval_from_long(res, get_type_mode(res_tp));
802 return new_r_Const(irg, tv);
813 * Checks if an entity represents the empty string.
815 * @param ent the entity
817 * @return non-zero if ent represents the empty string
819 static int is_empty_string(ir_entity *ent)
821 ir_type *tp = get_entity_type(ent);
824 ir_initializer_t *initializer;
825 ir_initializer_t *init0;
827 if (! is_Array_type(tp))
829 tp = get_array_element_type(tp);
830 if (! is_Primitive_type(tp))
832 mode = get_type_mode(tp);
834 /* FIXME: This is too restrict, as the type char might be more the 8bits */
835 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
838 if (!has_entity_initializer(ent)) {
839 /* code for deprecated compound_graph_path stuff */
840 size_t n = get_compound_ent_n_values(ent);
843 irn = get_compound_ent_value(ent, 0);
845 return is_Const(irn) && is_Const_null(irn);
848 initializer = get_entity_initializer(ent);
849 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
852 if (get_initializer_compound_n_entries(initializer) < 1)
855 init0 = get_initializer_compound_value(initializer, 0);
856 return initializer_val_is_null(init0);
857 } /* is_empty_string */
859 /* A mapper for strcmp */
860 int i_mapper_strcmp(ir_node *call, void *ctx)
862 ir_node *left = get_Call_param(call, 0);
863 ir_node *right = get_Call_param(call, 1);
867 ir_type *call_tp = get_Call_type(call);
868 ir_type *res_tp = get_method_res_type(call_tp, 0);
869 ir_entity *ent_l, *ent_r;
875 /* do some type checks first */
876 if (! is_Primitive_type(res_tp))
878 char_tp = get_method_param_type(call_tp, 0);
879 if (char_tp != get_method_param_type(call_tp, 1))
881 if (! is_Pointer_type(char_tp))
883 char_tp = get_pointer_points_to_type(char_tp);
886 /* a strcmp(s, s) ==> 0 */
887 ir_graph *irg = get_irn_irg(call);
888 ir_node *mem = get_Call_mem(call);
889 ir_mode *mode = get_type_mode(res_tp);
891 irn = new_r_Const(irg, get_mode_null(mode));
892 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
893 replace_call(irn, call, mem, NULL, NULL);
896 ent_l = get_const_entity(left);
897 ent_r = get_const_entity(right);
899 if (ent_l != NULL && ent_r != NULL) {
900 /* both entities are const, try to evaluate */
901 irn = eval_strcmp(get_irn_irg(call), ent_l, ent_r, res_tp);
902 } else if (ent_l != NULL) {
903 if (is_empty_string(ent_l)) {
904 /* s strcmp("", s) ==> -(*s)*/
906 goto replace_by_call;
908 } else if (ent_r != NULL) {
909 if (is_empty_string(ent_r)) {
910 /* s strcmp(s, "") ==> (*s) */
911 ir_node *mem, *block;
917 mem = get_Call_mem(call);
918 block = get_nodes_block(call);
919 dbg = get_irn_dbg_info(call);
920 mode = get_type_mode(char_tp);
922 /* replace the strcmp by (*x) */
923 irn = new_rd_Load(dbg, block, mem, v, mode, cons_none);
924 mem = new_r_Proj(irn, mode_M, pn_Load_M);
925 exc = new_r_Proj(irn, mode_X, pn_Load_X_except);
926 reg = new_r_Proj(irn, mode_X, pn_Load_X_regular);
927 irn = new_r_Proj(irn, mode, pn_Load_res);
929 /* conv to the result mode */
930 mode = get_type_mode(res_tp);
931 irn = new_rd_Conv(dbg, block, irn, mode);
934 /* negate in the ("", s) case */
935 irn = new_rd_Minus(dbg, block, irn, mode);
941 ir_node *mem = get_Call_mem(call);
942 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
943 replace_call(irn, call, mem, reg, exc);
948 } /* i_mapper_strcmp */
950 /* A mapper for strncmp */
951 int i_mapper_strncmp(ir_node *call, void *ctx)
953 ir_node *left = get_Call_param(call, 0);
954 ir_node *right = get_Call_param(call, 1);
955 ir_node *len = get_Call_param(call, 2);
959 if (left == right || (is_Const(len) && is_Const_null(len))) {
960 /* a strncmp(s, s, len) ==> 0 OR
961 a strncmp(a, b, 0) ==> 0 */
962 ir_graph *irg = get_irn_irg(call);
963 ir_node *mem = get_Call_mem(call);
964 ir_node *adr = get_Call_ptr(call);
965 ir_entity *ent = get_SymConst_entity(adr);
966 ir_type *call_tp = get_entity_type(ent);
967 ir_type *res_tp = get_method_res_type(call_tp, 0);
968 ir_mode *mode = get_type_mode(res_tp);
970 irn = new_r_Const(irg, get_mode_null(mode));
971 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
972 replace_call(irn, call, mem, NULL, NULL);
976 } /* i_mapper_strncmp */
978 /* A mapper for strcpy */
979 int i_mapper_strcpy(ir_node *call, void *ctx)
981 ir_node *dst = get_Call_param(call, 0);
982 ir_node *src = get_Call_param(call, 1);
986 /* a strcpy(d, s) ==> d */
987 ir_node *mem = get_Call_mem(call);
988 ir_node *dst = get_Call_param(call, 0);
990 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
991 replace_call(dst, call, mem, NULL, NULL);
995 } /* i_mapper_strcpy */
997 /* A mapper for memcpy */
998 int i_mapper_memcpy(ir_node *call, void *ctx)
1000 ir_node *dst = get_Call_param(call, 0);
1001 ir_node *src = get_Call_param(call, 1);
1002 ir_node *len = get_Call_param(call, 2);
1005 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1006 /* a memcpy(d, d, len) ==> d OR
1007 a memcpy(d, s, 0) ==> d */
1008 ir_node *mem = get_Call_mem(call);
1010 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
1011 replace_call(dst, call, mem, NULL, NULL);
1015 } /* i_mapper_memcpy */
1017 /* A mapper for mempcpy */
1018 int i_mapper_mempcpy(ir_node *call, void *ctx)
1020 ir_node *dst = get_Call_param(call, 0);
1021 ir_node *src = get_Call_param(call, 1);
1022 ir_node *len = get_Call_param(call, 2);
1025 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1026 /* a memcpy(d, d, len) ==> d + len OR
1027 a memcpy(d, s, 0) ==> d + 0 */
1028 dbg_info *dbg = get_irn_dbg_info(call);
1029 ir_node *mem = get_Call_mem(call);
1030 ir_node *blk = get_nodes_block(call);
1031 ir_mode *mode = get_irn_mode(dst);
1032 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
1034 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
1035 replace_call(res, call, mem, NULL, NULL);
1039 } /* i_mapper_mempcpy */
1041 /* A mapper for memmove */
1042 int i_mapper_memmove(ir_node *call, void *ctx)
1044 ir_node *dst = get_Call_param(call, 0);
1045 ir_node *src = get_Call_param(call, 1);
1046 ir_node *len = get_Call_param(call, 2);
1049 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1050 /* a memmove(d, d, len) ==> d OR
1051 a memmove(d, s, 0) ==> d */
1052 ir_node *mem = get_Call_mem(call);
1054 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
1055 replace_call(dst, call, mem, NULL, NULL);
1059 } /* i_mapper_memmove */
1061 /* A mapper for memset */
1062 int i_mapper_memset(ir_node *call, void *ctx)
1064 ir_node *len = get_Call_param(call, 2);
1067 if (is_Const(len) && is_Const_null(len)) {
1068 /* a memset(d, C, 0) ==> d */
1069 ir_node *mem = get_Call_mem(call);
1070 ir_node *dst = get_Call_param(call, 0);
1072 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
1073 replace_call(dst, call, mem, NULL, NULL);
1077 } /* i_mapper_memset */
1079 /* A mapper for memcmp */
1080 int i_mapper_memcmp(ir_node *call, void *ctx)
1082 ir_node *left = get_Call_param(call, 0);
1083 ir_node *right = get_Call_param(call, 1);
1084 ir_node *len = get_Call_param(call, 2);
1088 if (left == right || (is_Const(len) && is_Const_null(len))) {
1089 /* a memcmp(s, s, len) ==> 0 OR
1090 a memcmp(a, b, 0) ==> 0 */
1091 ir_graph *irg = get_irn_irg(call);
1092 ir_node *mem = get_Call_mem(call);
1093 ir_node *adr = get_Call_ptr(call);
1094 ir_entity *ent = get_SymConst_entity(adr);
1095 ir_type *call_tp = get_entity_type(ent);
1096 ir_type *res_tp = get_method_res_type(call_tp, 0);
1097 ir_mode *mode = get_type_mode(res_tp);
1099 irn = new_r_Const(irg, get_mode_null(mode));
1100 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1101 replace_call(irn, call, mem, NULL, NULL);
1105 } /* i_mapper_memcmp */
1108 * Returns the result mode of a node.
1110 static ir_mode *get_irn_res_mode(ir_node *node)
1112 switch (get_irn_opcode(node)) {
1113 case iro_Load: return get_Load_mode(node);
1114 case iro_Div: return get_Div_resmode(node);
1115 case iro_Mod: return get_Mod_resmode(node);
1116 default: return NULL;
1118 } /* get_irn_res_mode */
1120 #define LMAX(a, b) ((a) > (b) ? (a) : (b))
1122 /* A mapper for mapping unsupported instructions to runtime calls. */
1123 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt)
1125 int i, j, arity, first, n_param, n_res;
1128 ir_node *mem, *bl, *call, *addr, *res_proj;
1131 symconst_symbol sym;
1132 ir_mode *mode = get_irn_mode(node);
1134 if (mode != rt->mode)
1136 /* check if the result modes match */
1137 if (mode == mode_T && rt->res_mode != NULL) {
1138 mode = get_irn_res_mode(node);
1139 if (mode != rt->res_mode)
1143 arity = get_irn_arity(node);
1147 mtp = get_entity_type(rt->ent);
1148 n_param = get_method_n_params(mtp);
1149 irg = current_ir_graph;
1151 mem = get_irn_n(node, 0);
1152 if (get_irn_mode(mem) != mode_M) {
1153 mem = new_r_NoMem(irg);
1158 /* check if the modes of the predecessors match the parameter modes */
1159 if (arity - first != n_param)
1162 for (i = first, j = 0; i < arity; ++i, ++j) {
1163 ir_type *param_tp = get_method_param_type(mtp, j);
1164 ir_node *pred = get_irn_n(node, i);
1166 if (get_type_mode(param_tp) != get_irn_mode(pred))
1170 n_res = get_method_n_ress(mtp);
1172 /* step 0: calculate the number of needed Proj's */
1174 n_proj = LMAX(n_proj, rt->mem_proj_nr + 1);
1175 n_proj = LMAX(n_proj, rt->regular_proj_nr + 1);
1176 n_proj = LMAX(n_proj, rt->exc_proj_nr + 1);
1177 n_proj = LMAX(n_proj, rt->exc_mem_proj_nr + 1);
1178 n_proj = LMAX(n_proj, rt->res_proj_nr + 1);
1181 if (rt->mode != mode_T) /* must be mode_T */
1186 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1190 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1191 bl = get_nodes_block(node);
1195 NEW_ARR_A(ir_node *, in, n_param);
1196 for (i = 0; i < n_param; ++i)
1197 in[i] = get_irn_n(node, first + i);
1200 /* step 1: create the call */
1201 sym.entity_p = rt->ent;
1202 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1203 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1204 set_irn_pinned(call, get_irn_pinned(node));
1207 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1212 n_proj += n_res - 1;
1215 turn_into_tuple(node, n_proj);
1217 for (i = 0; i < n_proj; ++i)
1218 set_Tuple_pred(node, i, new_r_Bad(irg));
1219 if (rt->mem_proj_nr >= 0)
1220 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1221 if (!is_NoMem(mem)) {
1222 /* Exceptions can only be handled with real memory */
1223 if (rt->regular_proj_nr >= 0)
1224 set_Tuple_pred(node, rt->regular_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_regular));
1225 if (rt->exc_proj_nr >= 0)
1226 set_Tuple_pred(node, rt->exc_proj_nr, new_r_Proj(call, mode_X, pn_Call_X_except));
1227 if (rt->exc_mem_proj_nr >= 0)
1228 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1231 if (rt->res_proj_nr >= 0)
1232 for (i = 0; i < n_res; ++i)
1233 set_Tuple_pred(node, rt->res_proj_nr + i,
1234 new_r_Proj(res_proj, get_type_mode(get_method_res_type(mtp, i)), i));
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 */