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
43 #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);
65 const i_call_record *r;
68 symconst = get_Call_ptr(node);
69 if (! is_SymConst_addr_ent(symconst))
72 ent = get_SymConst_entity(symconst);
73 r = pmap_get(i_call_record const, wenv->c_map, ent);
76 wenv->nr_of_intrinsics += r->i_mapper(node, r->ctx) ? 1 : 0;
79 if (op->code < (unsigned) ARR_LEN(wenv->i_map)) {
80 const i_instr_record *r = wenv->i_map[op->code];
81 /* run all possible mapper */
83 if (r->i_mapper(node, r->ctx)) {
84 ++wenv->nr_of_intrinsics;
87 r = (const i_instr_record*)r->link;
93 size_t lower_intrinsics(i_record *list, size_t length, int part_block_used)
96 size_t n_ops = ir_get_n_opcodes();
98 pmap *c_map = pmap_create_ex(length);
99 i_instr_record **i_map;
100 size_t nr_of_intrinsics = 0;
103 /* we use the ir_op generic pointers here */
104 NEW_ARR_A(i_instr_record *, i_map, n_ops);
105 memset((void *)i_map, 0, sizeof(*i_map) * n_ops);
107 /* fill a map for faster search */
108 for (i = 0; i < length; ++i) {
109 if (list[i].i_call.kind == INTRINSIC_CALL) {
110 pmap_insert(c_map, list[i].i_call.i_ent, (void *)&list[i].i_call);
112 ir_op *op = list[i].i_instr.op;
113 assert(op->code < (unsigned) ARR_LEN(i_map));
115 list[i].i_instr.link = i_map[op->code];
116 i_map[op->code] = &list[i].i_instr;
123 for (i = 0, n = get_irp_n_irgs(); i < n; ++i) {
124 irg = get_irp_irg(i);
126 if (part_block_used) {
127 ir_reserve_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
128 collect_phiprojs(irg);
131 wenv.nr_of_intrinsics = 0;
132 irg_walk_graph(irg, NULL, call_mapper, &wenv);
135 ir_free_resources(irg, IR_RESOURCE_IRN_LINK | IR_RESOURCE_PHI_LIST);
137 if (wenv.nr_of_intrinsics > 0) {
138 confirm_irg_properties(irg, IR_GRAPH_PROPERTIES_NONE);
139 nr_of_intrinsics += wenv.nr_of_intrinsics;
144 return nr_of_intrinsics;
147 typedef struct pass_t {
156 * Wrapper for running lower_intrinsics() as an ir_prog pass.
158 static int pass_wrapper(ir_prog *irp, void *context)
160 pass_t *pass = (pass_t*)context;
161 (void) irp; /* TODO: set current irp, or remove parameter */
162 lower_intrinsics(pass->list, pass->length, pass->part_block_used);
163 /* probably this pass should not run again */
168 * Creates an ir_prog pass for lower_intrinsics.
170 * @param name the name of this pass or NULL
171 * @param list an array of intrinsic map records
172 * @param length the length of the array
173 * @param part_block_used set to true if part_block() must be using during lowering
175 ir_prog_pass_t *lower_intrinsics_pass(
177 i_record *list, size_t length, int part_block_used)
179 pass_t *const pass = XMALLOCF(pass_t, list, length);
180 memcpy(pass->list, list, sizeof(list[0]) * length);
181 pass->length = length;
182 pass->part_block_used = part_block_used;
184 return def_prog_pass_constructor(
185 &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
189 * Helper function, replace the call by the given node.
191 * @param irn the result node
192 * @param call the call to replace
193 * @param mem the new mem result
194 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
195 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
197 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem,
198 ir_node *reg_jmp, ir_node *exc_jmp)
200 ir_node *block = get_nodes_block(call);
201 ir_graph *irg = get_irn_irg(block);
202 ir_node *rest = new_r_Tuple(block, 1, &irn);
204 if (ir_throws_exception(call)) {
205 turn_into_tuple(call, pn_Call_max+1);
206 if (reg_jmp == NULL) {
207 reg_jmp = new_r_Jmp(block);
209 if (exc_jmp == NULL) {
210 exc_jmp = new_r_Bad(irg, mode_X);
212 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
213 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
215 assert(reg_jmp == NULL);
216 assert(exc_jmp == NULL);
217 turn_into_tuple(call, pn_Call_T_result+1);
218 assert(pn_Call_M <= pn_Call_T_result);
219 assert(pn_Call_X_regular > pn_Call_T_result);
220 assert(pn_Call_X_except > pn_Call_T_result);
222 set_Tuple_pred(call, pn_Call_M, mem);
223 set_Tuple_pred(call, pn_Call_T_result, rest);
226 int i_mapper_abs(ir_node *call, void *ctx)
228 ir_node *mem = get_Call_mem(call);
229 ir_node *block = get_nodes_block(call);
230 ir_node *op = get_Call_param(call, 0);
231 ir_graph *irg = get_irn_irg(call);
232 ir_mode *mode = get_irn_mode(op);
233 dbg_info *dbg = get_irn_dbg_info(call);
234 ir_node *zero = new_r_Const(irg, get_mode_null(mode));
235 ir_node *cmp = new_rd_Cmp(dbg, block, op, zero, ir_relation_less);
236 ir_node *minus_op = new_rd_Minus(dbg, block, op, mode);
238 arch_allow_ifconv_func allow_ifconv = be_get_backend_param()->allow_ifconv;
241 /* mux allowed by backend? */
242 if (!allow_ifconv(cmp, op, minus_op))
246 mux = new_rd_Mux(dbg, block, cmp, op, minus_op, mode);
247 DBG_OPT_ALGSIM0(call, mux, FS_OPT_RTS_ABS);
248 replace_call(mux, call, mem, NULL, NULL);
252 int i_mapper_bswap(ir_node *call, void *ctx)
254 ir_node *mem = get_Call_mem(call);
255 ir_node *block = get_nodes_block(call);
256 ir_node *op = get_Call_param(call, 0);
257 ir_type *tp = get_Call_type(call);
258 dbg_info *dbg = get_irn_dbg_info(call);
262 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
263 set_irn_pinned(irn, op_pin_state_floats);
264 irn = new_r_Proj(irn, get_irn_mode(op), pn_Builtin_max+1);
265 replace_call(irn, call, mem, NULL, NULL);
269 int i_mapper_alloca(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_node *irn, *exc, *no_exc;
275 dbg_info *dbg = get_irn_dbg_info(call);
278 if (mode_is_signed(get_irn_mode(op))) {
279 ir_mode *mode = get_irn_mode(op);
280 mode = find_unsigned_mode(mode);
282 panic("Cannot find unsigned mode for %M", mode);
284 op = new_rd_Conv(dbg, block, op, mode);
287 irn = new_rd_Alloc(dbg, block, mem, op, get_unknown_type(), stack_alloc);
288 mem = new_rd_Proj(dbg, irn, mode_M, pn_Alloc_M);
289 irn = new_rd_Proj(dbg, irn, get_modeP_data(), pn_Alloc_res);
290 if (ir_throws_exception(call)) {
291 no_exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_regular);
292 exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_except);
293 ir_set_throws_exception(irn, true);
299 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
300 replace_call(irn, call, mem, no_exc, exc);
304 int i_mapper_sqrt(ir_node *call, void *ctx)
308 ir_node *op = get_Call_param(call, 0);
314 tv = get_Const_tarval(op);
315 if (! tarval_is_null(tv) && !tarval_is_one(tv))
318 mem = get_Call_mem(call);
320 /* sqrt(0) = 0, sqrt(1) = 1 */
321 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
322 replace_call(op, call, mem, NULL, NULL);
326 int i_mapper_cbrt(ir_node *call, void *ctx)
330 ir_node *op = get_Call_param(call, 0);
336 tv = get_Const_tarval(op);
337 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
340 mem = get_Call_mem(call);
342 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
343 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
344 replace_call(op, call, mem, NULL, NULL);
348 int i_mapper_pow(ir_node *call, void *ctx)
350 ir_node *left = get_Call_param(call, 0);
351 ir_node *right = get_Call_param(call, 1);
352 ir_node *block = get_nodes_block(call);
353 ir_graph *irg = get_irn_irg(block);
354 ir_node *reg_jmp = NULL;
355 ir_node *exc_jmp = NULL;
361 if (is_Const(left) && is_Const_one(left)) {
362 /* pow (1.0, x) = 1.0 */
364 } else if (is_Const(right)) {
365 ir_tarval *tv = get_Const_tarval(right);
366 if (tarval_is_null(tv)) {
367 /* pow(x, 0.0) = 1.0 */
368 ir_mode *mode = get_tarval_mode(tv);
369 irn = new_r_Const(irg, get_mode_one(mode));
370 } else if (tarval_is_one(tv)) {
371 /* pow(x, 1.0) = x */
373 } else if (tarval_is_minus_one(tv)) {
374 /* pow(x, -1.0) = 1/x */
382 mem = get_Call_mem(call);
383 dbg = get_irn_dbg_info(call);
386 ir_mode *result_mode = get_irn_mode(left);
389 ir_mode *mode = result_mode;
390 ir_mode *float_arithmetic = be_get_backend_param()->mode_float_arithmetic;
391 if (float_arithmetic != NULL) {
392 left = new_r_Conv(block, left, float_arithmetic);
393 mode = float_arithmetic;
396 irn = new_r_Const(irg, get_mode_one(mode));
397 div = new_rd_Div(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
398 mem = new_r_Proj(div, mode_M, pn_Div_M);
399 irn = new_r_Proj(div, mode, pn_Div_res);
400 if (ir_throws_exception(call)) {
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);
403 ir_set_throws_exception(div, true);
405 if (result_mode != mode) {
406 irn = new_r_Conv(block, irn, result_mode);
409 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
410 replace_call(irn, call, mem, reg_jmp, exc_jmp);
414 int i_mapper_exp(ir_node *call, void *ctx)
416 ir_node *val = get_Call_param(call, 0);
419 if (is_Const(val) && is_Const_null(val)) {
421 ir_graph *irg = get_irn_irg(val);
422 ir_mode *mode = get_irn_mode(val);
423 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
424 ir_node *mem = get_Call_mem(call);
425 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
426 replace_call(irn, call, mem, NULL, NULL);
432 int i_mapper_exp2(ir_node *call, void *ctx)
434 return i_mapper_exp(call, ctx);
437 int i_mapper_exp10(ir_node *call, void *ctx)
439 return i_mapper_exp(call, ctx);
443 * A mapper for mapping f(0.0) to 0.0.
445 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
447 ir_node *val = get_Call_param(call, 0);
450 if (is_Const(val) && is_Const_null(val)) {
452 ir_node *mem = get_Call_mem(call);
453 DBG_OPT_ALGSIM0(call, val, reason);
454 replace_call(val, call, mem, NULL, NULL);
461 * A mapper for mapping f(1.0) to 0.0.
463 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
465 ir_node *val = get_Call_param(call, 0);
468 if (is_Const(val) && is_Const_one(val)) {
469 /* acos(1.0) = 0.0 */
470 ir_graph *irg = get_irn_irg(val);
471 ir_mode *mode = get_irn_mode(val);
472 ir_node *irn = new_r_Const(irg, get_mode_null(mode));
473 ir_node *mem = get_Call_mem(call);
474 DBG_OPT_ALGSIM0(call, irn, reason);
475 replace_call(irn, call, mem, NULL, NULL);
482 * A mapper for mapping a functions with the following characteristics:
486 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
489 ir_node *val = get_Call_param(call, 0);
493 ir_node *op = get_Conv_op(val);
495 /* f(-x) = f(x) with strictConv */
496 ir_node *block = get_nodes_block(call);
497 ir_mode *mode = get_irn_mode(val);
498 dbg_info *dbg = get_irn_dbg_info(val);
500 op = get_Minus_op(op);
501 val = new_rd_Conv(dbg, block, op, mode);
502 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
503 set_Call_param(call, 0, val);
506 } else if (is_Minus(val)) {
508 val = get_Minus_op(val);
509 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
510 set_Call_param(call, 0, val);
514 if (is_Const(val) && is_Const_null(val)) {
516 ir_graph *irg = get_irn_irg(val);
517 ir_mode *mode = get_irn_mode(val);
518 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
519 ir_node *mem = get_Call_mem(call);
520 DBG_OPT_ALGSIM0(call, irn, reason);
521 replace_call(irn, call, mem, NULL, NULL);
527 int i_mapper_log(ir_node *call, void *ctx)
530 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
533 int i_mapper_log2(ir_node *call, void *ctx)
535 /* log2(1.0) = 0.0 */
536 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
539 int i_mapper_log10(ir_node *call, void *ctx)
541 /* log10(1.0) = 0.0 */
542 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
545 int i_mapper_sin(ir_node *call, void *ctx)
548 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
551 int i_mapper_cos(ir_node *call, void *ctx)
553 /* cos(0.0) = 1.0, cos(-x) = x */
554 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
557 int i_mapper_tan(ir_node *call, void *ctx)
560 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
563 int i_mapper_asin(ir_node *call, void *ctx)
565 /* asin(0.0) = 0.0 */
566 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
569 int i_mapper_acos(ir_node *call, void *ctx)
571 /* acos(1.0) = 0.0 */
572 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
575 int i_mapper_atan(ir_node *call, void *ctx)
577 /* atan(0.0) = 0.0 */
578 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
581 int i_mapper_sinh(ir_node *call, void *ctx)
583 /* sinh(0.0) = 0.0 */
584 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
587 int i_mapper_cosh(ir_node *call, void *ctx)
589 /* cosh(0.0) = 1.0, cosh(-x) = x */
590 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
593 int i_mapper_tanh(ir_node *call, void *ctx)
595 /* tanh(0.0) = 0.0 */
596 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
600 * Return the const entity that is accessed through the pointer ptr or
601 * NULL if there is no entity (or the entity is not constant).
603 * @param ptr the pointer
605 static ir_entity *get_const_entity(ir_node *ptr)
607 if (is_SymConst_addr_ent(ptr)) {
608 ir_entity *ent = get_SymConst_entity(ptr);
610 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
611 /* a constant entity */
618 static ir_tarval *get_initializer_value(ir_initializer_t *const init, ir_mode *const mode)
620 switch (get_initializer_kind(init)) {
621 case IR_INITIALIZER_NULL:
622 return get_mode_null(mode);
624 case IR_INITIALIZER_TARVAL:
625 return get_initializer_tarval_value(init);
627 case IR_INITIALIZER_CONST: {
628 ir_node *const irn = get_initializer_const_value(init);
630 return get_Const_tarval(irn);
634 case IR_INITIALIZER_COMPOUND:
638 return get_tarval_undefined();
641 static bool initializer_val_is_null(ir_initializer_t *init)
645 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
648 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
649 tv = get_initializer_tarval_value(init);
650 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
651 ir_node *irn = get_initializer_const_value(init);
654 tv = get_Const_tarval(irn);
659 return tarval_is_null(tv);
663 * Calculate the value of strlen if possible.
665 * @param ent the entity
666 * @param res_tp the result type
668 * @return a Const node containing the strlen() result or NULL
669 * if the evaluation fails
671 static ir_node *eval_strlen(ir_graph *irg, ir_entity *ent, ir_type *res_tp)
673 ir_type *tp = get_entity_type(ent);
675 ir_initializer_t *initializer;
679 if (! is_Array_type(tp))
681 tp = get_array_element_type(tp);
682 if (! is_Primitive_type(tp))
684 mode = get_type_mode(tp);
686 /* FIXME: This is too restrict, as the type char might be more the 8bits */
687 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
690 initializer = get_entity_initializer(ent);
691 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
694 size = get_initializer_compound_n_entries(initializer);
695 for (i = 0; i < size; ++i) {
696 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
697 if (initializer_val_is_null(val)) {
698 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
699 return new_r_Const(irg, tv);
706 int i_mapper_strlen(ir_node *call, void *ctx)
708 ir_node *s = get_Call_param(call, 0);
709 ir_entity *ent = get_const_entity(s);
713 /* FIXME: this cannot handle constant strings inside struct initializers yet */
715 /* a constant entity */
716 ir_type *tp = get_Call_type(call);
719 tp = get_method_res_type(tp, 0);
720 irn = eval_strlen(get_irn_irg(call), ent, tp);
723 ir_node *mem = get_Call_mem(call);
724 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
725 replace_call(irn, call, mem, NULL, NULL);
733 * Calculate the value of strlen if possible.
735 * @param left the left entity
736 * @param right the right entity
737 * @param res_tp the result type
739 * @return a Const node containing the strcmp() result or NULL
740 * if the evaluation fails
742 static ir_node *eval_strcmp(ir_graph *irg, ir_entity *left, ir_entity *right,
747 ir_initializer_t *init_l;
748 ir_initializer_t *init_r;
754 tp = get_entity_type(left);
755 if (! is_Array_type(tp))
757 tp = get_array_element_type(tp);
758 if (! is_Primitive_type(tp))
760 mode = get_type_mode(tp);
762 /* FIXME: This is too restrict, as the type char might be more the 8bits */
763 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
766 tp = get_entity_type(right);
767 if (! is_Array_type(tp))
769 tp = get_array_element_type(tp);
770 if (! is_Primitive_type(tp))
772 mode = get_type_mode(tp);
774 /* FIXME: This is too restrict, as the type char might be more the 8bits */
775 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
778 init_l = get_entity_initializer(left);
779 init_r = get_entity_initializer(right);
780 if (get_initializer_kind(init_l) != IR_INITIALIZER_COMPOUND ||
781 get_initializer_kind(init_r) != IR_INITIALIZER_COMPOUND)
784 size_l = get_initializer_compound_n_entries(init_l);
785 size_r = get_initializer_compound_n_entries(init_r);
786 size = size_l < size_r ? size_l : size_r;
788 for (i = 0; i != size; ++i) {
789 ir_initializer_t *const val_l = get_initializer_compound_value(init_l, i);
790 ir_tarval *const tv_l = get_initializer_value(val_l, mode);
791 ir_initializer_t *const val_r = get_initializer_compound_value(init_r, i);
792 ir_tarval *const tv_r = get_initializer_value(val_r, mode);
794 if (!tarval_is_constant(tv_l) || !tarval_is_constant(tv_r))
798 ir_mode *const res_mode = get_type_mode(res_tp);
799 ir_tarval *const res_l = tarval_convert_to(tv_l, res_mode);
800 ir_tarval *const res_r = tarval_convert_to(tv_r, res_mode);
801 ir_tarval *const tv = tarval_sub(res_l, res_r, res_mode);
802 return new_r_Const(irg, tv);
805 if (tarval_is_null(tv_l)) {
806 ir_tarval *const tv = get_mode_null(get_type_mode(res_tp));
807 return new_r_Const(irg, tv);
815 * Checks if an entity represents the empty string.
817 * @param ent the entity
819 * @return non-zero if ent represents the empty string
821 static int is_empty_string(ir_entity *ent)
823 ir_type *tp = get_entity_type(ent);
825 ir_initializer_t *initializer;
826 ir_initializer_t *init0;
828 if (! is_Array_type(tp))
830 tp = get_array_element_type(tp);
831 if (! is_Primitive_type(tp))
833 mode = get_type_mode(tp);
835 /* FIXME: This is too restrict, as the type char might be more the 8bits */
836 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
839 initializer = get_entity_initializer(ent);
840 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
843 if (get_initializer_compound_n_entries(initializer) < 1)
846 init0 = get_initializer_compound_value(initializer, 0);
847 return initializer_val_is_null(init0);
850 int i_mapper_strcmp(ir_node *call, void *ctx)
852 ir_node *left = get_Call_param(call, 0);
853 ir_node *right = get_Call_param(call, 1);
857 ir_type *call_tp = get_Call_type(call);
858 ir_type *res_tp = get_method_res_type(call_tp, 0);
859 ir_entity *ent_l, *ent_r;
865 /* do some type checks first */
866 if (! is_Primitive_type(res_tp))
868 char_tp = get_method_param_type(call_tp, 0);
869 if (char_tp != get_method_param_type(call_tp, 1))
871 if (! is_Pointer_type(char_tp))
873 char_tp = get_pointer_points_to_type(char_tp);
876 /* a strcmp(s, s) ==> 0 */
877 ir_graph *irg = get_irn_irg(call);
878 ir_node *mem = get_Call_mem(call);
879 ir_mode *mode = get_type_mode(res_tp);
881 irn = new_r_Const(irg, get_mode_null(mode));
882 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
883 replace_call(irn, call, mem, NULL, NULL);
886 ent_l = get_const_entity(left);
887 ent_r = get_const_entity(right);
889 if (ent_l != NULL && ent_r != NULL) {
890 /* both entities are const, try to evaluate */
891 irn = eval_strcmp(get_irn_irg(call), ent_l, ent_r, res_tp);
892 } else if (ent_l != NULL) {
893 if (is_empty_string(ent_l)) {
894 /* s strcmp("", s) ==> -(*s)*/
896 goto replace_by_call;
898 } else if (ent_r != NULL) {
899 if (is_empty_string(ent_r)) {
900 /* s strcmp(s, "") ==> (*s) */
901 ir_node *mem, *block;
907 mem = get_Call_mem(call);
908 block = get_nodes_block(call);
909 dbg = get_irn_dbg_info(call);
910 mode = get_type_mode(char_tp);
912 /* replace the strcmp by (*x) */
913 irn = new_rd_Load(dbg, block, mem, v, mode, cons_none);
914 mem = new_r_Proj(irn, mode_M, pn_Load_M);
915 irn = new_r_Proj(irn, mode, pn_Load_res);
916 if (ir_throws_exception(call)) {
917 exc = new_r_Proj(irn, mode_X, pn_Load_X_except);
918 reg = new_r_Proj(irn, mode_X, pn_Load_X_regular);
919 ir_set_throws_exception(irn, true);
925 /* conv to the result mode */
926 mode = get_type_mode(res_tp);
927 irn = new_rd_Conv(dbg, block, irn, mode);
930 /* negate in the ("", s) case */
931 irn = new_rd_Minus(dbg, block, irn, mode);
937 ir_node *mem = get_Call_mem(call);
938 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
939 replace_call(irn, call, mem, reg, exc);
946 int i_mapper_strncmp(ir_node *call, void *ctx)
948 ir_node *left = get_Call_param(call, 0);
949 ir_node *right = get_Call_param(call, 1);
950 ir_node *len = get_Call_param(call, 2);
954 if (left == right || (is_Const(len) && is_Const_null(len))) {
955 /* a strncmp(s, s, len) ==> 0 OR
956 a strncmp(a, b, 0) ==> 0 */
957 ir_graph *irg = get_irn_irg(call);
958 ir_node *mem = get_Call_mem(call);
959 ir_node *adr = get_Call_ptr(call);
960 ir_entity *ent = get_SymConst_entity(adr);
961 ir_type *call_tp = get_entity_type(ent);
962 ir_type *res_tp = get_method_res_type(call_tp, 0);
963 ir_mode *mode = get_type_mode(res_tp);
965 irn = new_r_Const(irg, get_mode_null(mode));
966 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
967 replace_call(irn, call, mem, NULL, NULL);
973 int i_mapper_strcpy(ir_node *call, void *ctx)
975 ir_node *dst = get_Call_param(call, 0);
976 ir_node *src = get_Call_param(call, 1);
980 /* a strcpy(d, s) ==> d */
981 ir_node *mem = get_Call_mem(call);
982 ir_node *dst = get_Call_param(call, 0);
984 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
985 replace_call(dst, call, mem, NULL, NULL);
991 int i_mapper_memcpy(ir_node *call, void *ctx)
993 ir_node *dst = get_Call_param(call, 0);
994 ir_node *src = get_Call_param(call, 1);
995 ir_node *len = get_Call_param(call, 2);
998 if (dst == src || (is_Const(len) && is_Const_null(len))) {
999 /* a memcpy(d, d, len) ==> d OR
1000 a memcpy(d, s, 0) ==> d */
1001 ir_node *mem = get_Call_mem(call);
1003 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
1004 replace_call(dst, call, mem, NULL, NULL);
1010 int i_mapper_mempcpy(ir_node *call, void *ctx)
1012 ir_node *dst = get_Call_param(call, 0);
1013 ir_node *src = get_Call_param(call, 1);
1014 ir_node *len = get_Call_param(call, 2);
1017 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1018 /* a memcpy(d, d, len) ==> d + len OR
1019 a memcpy(d, s, 0) ==> d + 0 */
1020 dbg_info *dbg = get_irn_dbg_info(call);
1021 ir_node *mem = get_Call_mem(call);
1022 ir_node *blk = get_nodes_block(call);
1023 ir_mode *mode = get_irn_mode(dst);
1024 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
1026 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
1027 replace_call(res, call, mem, NULL, NULL);
1033 int i_mapper_memmove(ir_node *call, void *ctx)
1035 ir_node *dst = get_Call_param(call, 0);
1036 ir_node *src = get_Call_param(call, 1);
1037 ir_node *len = get_Call_param(call, 2);
1040 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1041 /* a memmove(d, d, len) ==> d OR
1042 a memmove(d, s, 0) ==> d */
1043 ir_node *mem = get_Call_mem(call);
1045 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
1046 replace_call(dst, call, mem, NULL, NULL);
1052 int i_mapper_memset(ir_node *call, void *ctx)
1054 ir_node *len = get_Call_param(call, 2);
1057 if (is_Const(len) && is_Const_null(len)) {
1058 /* a memset(d, C, 0) ==> d */
1059 ir_node *mem = get_Call_mem(call);
1060 ir_node *dst = get_Call_param(call, 0);
1062 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
1063 replace_call(dst, call, mem, NULL, NULL);
1069 int i_mapper_memcmp(ir_node *call, void *ctx)
1071 ir_node *left = get_Call_param(call, 0);
1072 ir_node *right = get_Call_param(call, 1);
1073 ir_node *len = get_Call_param(call, 2);
1077 if (left == right || (is_Const(len) && is_Const_null(len))) {
1078 /* a memcmp(s, s, len) ==> 0 OR
1079 a memcmp(a, b, 0) ==> 0 */
1080 ir_graph *irg = get_irn_irg(call);
1081 ir_node *mem = get_Call_mem(call);
1082 ir_node *adr = get_Call_ptr(call);
1083 ir_entity *ent = get_SymConst_entity(adr);
1084 ir_type *call_tp = get_entity_type(ent);
1085 ir_type *res_tp = get_method_res_type(call_tp, 0);
1086 ir_mode *mode = get_type_mode(res_tp);
1088 irn = new_r_Const(irg, get_mode_null(mode));
1089 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1090 replace_call(irn, call, mem, NULL, NULL);
1097 * Returns the result mode of a node.
1099 static ir_mode *get_irn_res_mode(ir_node *node)
1101 switch (get_irn_opcode(node)) {
1102 case iro_Load: return get_Load_mode(node);
1103 case iro_Div: return get_Div_resmode(node);
1104 case iro_Mod: return get_Mod_resmode(node);
1105 default: return NULL;
1109 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt)
1111 int i, j, arity, first, n_param, n_res;
1114 ir_node *mem, *bl, *call, *addr, *res_proj;
1116 bool throws_exception;
1119 symconst_symbol sym;
1120 ir_mode *mode = get_irn_mode(node);
1122 if (mode != rt->mode)
1124 /* check if the result modes match */
1125 if (mode == mode_T && rt->res_mode != NULL) {
1126 mode = get_irn_res_mode(node);
1127 if (mode != rt->res_mode)
1131 arity = get_irn_arity(node);
1135 mtp = get_entity_type(rt->ent);
1136 n_param = get_method_n_params(mtp);
1137 irg = current_ir_graph;
1139 mem = get_irn_n(node, 0);
1140 if (get_irn_mode(mem) != mode_M) {
1141 mem = new_r_NoMem(irg);
1146 /* check if the modes of the predecessors match the parameter modes */
1147 if (arity - first != n_param)
1150 for (i = first, j = 0; i < arity; ++i, ++j) {
1151 ir_type *param_tp = get_method_param_type(mtp, j);
1152 ir_node *pred = get_irn_n(node, i);
1154 if (get_type_mode(param_tp) != get_irn_mode(pred))
1158 n_res = get_method_n_ress(mtp);
1159 throws_exception = ir_throws_exception(node);
1161 /* step 0: calculate the number of needed Proj's */
1163 n_proj = MAX(n_proj, rt->mem_proj_nr + 1);
1164 n_proj = MAX(n_proj, rt->res_proj_nr + 1);
1165 if (throws_exception) {
1166 n_proj = MAX(n_proj, rt->regular_proj_nr + 1);
1167 n_proj = MAX(n_proj, rt->exc_proj_nr + 1);
1171 if (rt->mode != mode_T) /* must be mode_T */
1176 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1180 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1181 bl = get_nodes_block(node);
1182 op = get_irn_op(node);
1186 NEW_ARR_A(ir_node *, in, n_param);
1187 for (i = 0; i < n_param; ++i)
1188 in[i] = get_irn_n(node, first + i);
1191 /* step 1: create the call */
1192 sym.entity_p = rt->ent;
1193 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1194 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1195 set_irn_pinned(call, get_irn_pinned(node));
1198 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1203 n_proj += n_res - 1;
1206 turn_into_tuple(node, n_proj);
1208 if (rt->mem_proj_nr >= 0)
1209 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1210 if (throws_exception) {
1211 set_Tuple_pred(node, op->pn_x_regular, new_r_Proj(call, mode_X, pn_Call_X_regular));
1212 set_Tuple_pred(node, op->pn_x_except, new_r_Proj(call, mode_X, pn_Call_X_except));
1215 if (rt->res_proj_nr >= 0) {
1216 for (i = 0; i < n_res; ++i) {
1217 ir_mode *mode = get_type_mode(get_method_res_type(mtp, i));
1218 ir_node *proj = new_r_Proj(res_proj, mode, i);
1219 set_Tuple_pred(node, rt->res_proj_nr + i, proj);
1224 /* only one return value supported */
1226 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1228 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1229 res_proj = new_r_Proj(res_proj, mode, 0);
1231 exchange(node, res_proj);
1235 /* should not happen */