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 = (const i_call_record*)pmap_get(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 /* Changes detected: we might have added/removed nodes. */
139 set_irg_callee_info_state(irg, irg_callee_info_inconsistent);
141 /* Exception control flow might have changed / new block might have added. */
142 clear_irg_properties(irg, IR_GRAPH_PROPERTY_CONSISTENT_DOMINANCE);
145 irg_verify(irg, VERIFY_NORMAL);
147 nr_of_intrinsics += wenv.nr_of_intrinsics;
152 return nr_of_intrinsics;
155 typedef struct pass_t {
164 * Wrapper for running lower_intrinsics() as an ir_prog pass.
166 static int pass_wrapper(ir_prog *irp, void *context)
168 pass_t *pass = (pass_t*)context;
169 (void) irp; /* TODO: set current irp, or remove parameter */
170 lower_intrinsics(pass->list, pass->length, pass->part_block_used);
171 /* probably this pass should not run again */
176 * Creates an ir_prog pass for lower_intrinsics.
178 * @param name the name of this pass or NULL
179 * @param list an array of intrinsic map records
180 * @param length the length of the array
181 * @param part_block_used set to true if part_block() must be using during lowering
183 ir_prog_pass_t *lower_intrinsics_pass(
185 i_record *list, size_t length, int part_block_used)
187 pass_t *const pass = XMALLOCF(pass_t, list, length);
188 memcpy(pass->list, list, sizeof(list[0]) * length);
189 pass->length = length;
190 pass->part_block_used = part_block_used;
192 return def_prog_pass_constructor(
193 &pass->pass, name ? name : "lower_intrinsics", pass_wrapper);
197 * Helper function, replace the call by the given node.
199 * @param irn the result node
200 * @param call the call to replace
201 * @param mem the new mem result
202 * @param reg_jmp new regular control flow, if NULL, a Jmp will be used
203 * @param exc_jmp new exception control flow, if reg_jmp == NULL, a Bad will be used
205 static void replace_call(ir_node *irn, ir_node *call, ir_node *mem,
206 ir_node *reg_jmp, ir_node *exc_jmp)
208 ir_node *block = get_nodes_block(call);
209 ir_graph *irg = get_irn_irg(block);
210 ir_node *rest = new_r_Tuple(block, 1, &irn);
212 if (ir_throws_exception(call)) {
213 turn_into_tuple(call, pn_Call_max+1);
214 if (reg_jmp == NULL) {
215 reg_jmp = new_r_Jmp(block);
217 if (exc_jmp == NULL) {
218 exc_jmp = new_r_Bad(irg, mode_X);
220 set_Tuple_pred(call, pn_Call_X_regular, reg_jmp);
221 set_Tuple_pred(call, pn_Call_X_except, exc_jmp);
223 assert(reg_jmp == NULL);
224 assert(exc_jmp == NULL);
225 turn_into_tuple(call, pn_Call_T_result+1);
226 assert(pn_Call_M <= pn_Call_T_result);
227 assert(pn_Call_X_regular > pn_Call_T_result);
228 assert(pn_Call_X_except > pn_Call_T_result);
230 set_Tuple_pred(call, pn_Call_M, mem);
231 set_Tuple_pred(call, pn_Call_T_result, rest);
234 int i_mapper_abs(ir_node *call, void *ctx)
236 ir_node *mem = get_Call_mem(call);
237 ir_node *block = get_nodes_block(call);
238 ir_node *op = get_Call_param(call, 0);
239 ir_graph *irg = get_irn_irg(call);
240 ir_mode *mode = get_irn_mode(op);
241 dbg_info *dbg = get_irn_dbg_info(call);
242 ir_node *zero = new_r_Const(irg, get_mode_null(mode));
243 ir_node *cmp = new_rd_Cmp(dbg, block, op, zero, ir_relation_less);
244 ir_node *minus_op = new_rd_Minus(dbg, block, op, mode);
246 arch_allow_ifconv_func allow_ifconv = be_get_backend_param()->allow_ifconv;
249 /* mux allowed by backend? */
250 if (!allow_ifconv(cmp, op, minus_op))
254 mux = new_rd_Mux(dbg, block, cmp, op, minus_op, mode);
255 DBG_OPT_ALGSIM0(call, mux, FS_OPT_RTS_ABS);
256 replace_call(mux, call, mem, NULL, NULL);
260 int i_mapper_bswap(ir_node *call, void *ctx)
262 ir_node *mem = get_Call_mem(call);
263 ir_node *block = get_nodes_block(call);
264 ir_node *op = get_Call_param(call, 0);
265 ir_type *tp = get_Call_type(call);
266 dbg_info *dbg = get_irn_dbg_info(call);
270 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(current_ir_graph), 1, &op, ir_bk_bswap, tp);
271 set_irn_pinned(irn, op_pin_state_floats);
272 irn = new_r_Proj(irn, get_irn_mode(op), pn_Builtin_max+1);
273 replace_call(irn, call, mem, NULL, NULL);
277 int i_mapper_alloca(ir_node *call, void *ctx)
279 ir_node *mem = get_Call_mem(call);
280 ir_node *block = get_nodes_block(call);
281 ir_node *op = get_Call_param(call, 0);
282 ir_node *irn, *exc, *no_exc;
283 dbg_info *dbg = get_irn_dbg_info(call);
286 if (mode_is_signed(get_irn_mode(op))) {
287 ir_mode *mode = get_irn_mode(op);
288 mode = find_unsigned_mode(mode);
290 panic("Cannot find unsigned mode for %M", mode);
292 op = new_rd_Conv(dbg, block, op, mode);
295 irn = new_rd_Alloc(dbg, block, mem, op, get_unknown_type(), stack_alloc);
296 mem = new_rd_Proj(dbg, irn, mode_M, pn_Alloc_M);
297 irn = new_rd_Proj(dbg, irn, get_modeP_data(), pn_Alloc_res);
298 if (ir_throws_exception(call)) {
299 no_exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_regular);
300 exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_except);
301 ir_set_throws_exception(irn, true);
307 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
308 replace_call(irn, call, mem, no_exc, exc);
312 int i_mapper_sqrt(ir_node *call, void *ctx)
316 ir_node *op = get_Call_param(call, 0);
322 tv = get_Const_tarval(op);
323 if (! tarval_is_null(tv) && !tarval_is_one(tv))
326 mem = get_Call_mem(call);
328 /* sqrt(0) = 0, sqrt(1) = 1 */
329 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
330 replace_call(op, call, mem, NULL, NULL);
334 int i_mapper_cbrt(ir_node *call, void *ctx)
338 ir_node *op = get_Call_param(call, 0);
344 tv = get_Const_tarval(op);
345 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
348 mem = get_Call_mem(call);
350 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
351 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
352 replace_call(op, call, mem, NULL, NULL);
356 int i_mapper_pow(ir_node *call, void *ctx)
358 ir_node *left = get_Call_param(call, 0);
359 ir_node *right = get_Call_param(call, 1);
360 ir_node *block = get_nodes_block(call);
361 ir_graph *irg = get_irn_irg(block);
362 ir_node *reg_jmp = NULL;
363 ir_node *exc_jmp = NULL;
369 if (is_Const(left) && is_Const_one(left)) {
370 /* pow (1.0, x) = 1.0 */
372 } else if (is_Const(right)) {
373 ir_tarval *tv = get_Const_tarval(right);
374 if (tarval_is_null(tv)) {
375 /* pow(x, 0.0) = 1.0 */
376 ir_mode *mode = get_tarval_mode(tv);
377 irn = new_r_Const(irg, get_mode_one(mode));
378 } else if (tarval_is_one(tv)) {
379 /* pow(x, 1.0) = x */
381 } else if (tarval_is_minus_one(tv)) {
382 /* pow(x, -1.0) = 1/x */
390 mem = get_Call_mem(call);
391 dbg = get_irn_dbg_info(call);
394 ir_mode *mode = get_irn_mode(left);
397 irn = new_r_Const(irg, get_mode_one(mode));
398 div = new_rd_Div(dbg, block, mem, irn, left, mode, op_pin_state_pinned);
399 mem = new_r_Proj(div, mode_M, pn_Div_M);
400 irn = new_r_Proj(div, mode, pn_Div_res);
401 if (ir_throws_exception(call)) {
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);
404 ir_set_throws_exception(div, true);
407 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
408 replace_call(irn, call, mem, reg_jmp, exc_jmp);
412 int i_mapper_exp(ir_node *call, void *ctx)
414 ir_node *val = get_Call_param(call, 0);
417 if (is_Const(val) && is_Const_null(val)) {
419 ir_graph *irg = get_irn_irg(val);
420 ir_mode *mode = get_irn_mode(val);
421 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
422 ir_node *mem = get_Call_mem(call);
423 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_EXP);
424 replace_call(irn, call, mem, NULL, NULL);
430 int i_mapper_exp2(ir_node *call, void *ctx)
432 return i_mapper_exp(call, ctx);
435 int i_mapper_exp10(ir_node *call, void *ctx)
437 return i_mapper_exp(call, ctx);
441 * A mapper for mapping f(0.0) to 0.0.
443 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
445 ir_node *val = get_Call_param(call, 0);
448 if (is_Const(val) && is_Const_null(val)) {
450 ir_node *mem = get_Call_mem(call);
451 DBG_OPT_ALGSIM0(call, val, reason);
452 replace_call(val, call, mem, NULL, NULL);
459 * A mapper for mapping f(1.0) to 0.0.
461 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
463 ir_node *val = get_Call_param(call, 0);
466 if (is_Const(val) && is_Const_one(val)) {
467 /* acos(1.0) = 0.0 */
468 ir_graph *irg = get_irn_irg(val);
469 ir_mode *mode = get_irn_mode(val);
470 ir_node *irn = new_r_Const(irg, get_mode_null(mode));
471 ir_node *mem = get_Call_mem(call);
472 DBG_OPT_ALGSIM0(call, irn, reason);
473 replace_call(irn, call, mem, NULL, NULL);
480 * A mapper for mapping a functions with the following characteristics:
484 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
487 ir_node *val = get_Call_param(call, 0);
490 if (is_strictConv(val)) {
491 ir_node *op = get_Conv_op(val);
493 /* f(-x) = f(x) with strictConv */
494 ir_node *block = get_nodes_block(call);
495 ir_mode *mode = get_irn_mode(val);
496 dbg_info *dbg = get_irn_dbg_info(val);
498 op = get_Minus_op(op);
499 val = new_rd_Conv(dbg, block, op, mode);
502 set_Conv_strict(val, 1);
504 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
505 set_Call_param(call, 0, val);
508 } else if (is_Minus(val)) {
510 val = get_Minus_op(val);
511 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
512 set_Call_param(call, 0, val);
516 if (is_Const(val) && is_Const_null(val)) {
518 ir_graph *irg = get_irn_irg(val);
519 ir_mode *mode = get_irn_mode(val);
520 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
521 ir_node *mem = get_Call_mem(call);
522 DBG_OPT_ALGSIM0(call, irn, reason);
523 replace_call(irn, call, mem, NULL, NULL);
529 int i_mapper_log(ir_node *call, void *ctx)
532 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
535 int i_mapper_log2(ir_node *call, void *ctx)
537 /* log2(1.0) = 0.0 */
538 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
541 int i_mapper_log10(ir_node *call, void *ctx)
543 /* log10(1.0) = 0.0 */
544 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
547 int i_mapper_sin(ir_node *call, void *ctx)
550 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
553 int i_mapper_cos(ir_node *call, void *ctx)
555 /* cos(0.0) = 1.0, cos(-x) = x */
556 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
559 int i_mapper_tan(ir_node *call, void *ctx)
562 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
565 int i_mapper_asin(ir_node *call, void *ctx)
567 /* asin(0.0) = 0.0 */
568 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
571 int i_mapper_acos(ir_node *call, void *ctx)
573 /* acos(1.0) = 0.0 */
574 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
577 int i_mapper_atan(ir_node *call, void *ctx)
579 /* atan(0.0) = 0.0 */
580 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
583 int i_mapper_sinh(ir_node *call, void *ctx)
585 /* sinh(0.0) = 0.0 */
586 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
589 int i_mapper_cosh(ir_node *call, void *ctx)
591 /* cosh(0.0) = 1.0, cosh(-x) = x */
592 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
595 int i_mapper_tanh(ir_node *call, void *ctx)
597 /* tanh(0.0) = 0.0 */
598 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
602 * Return the const entity that is accessed through the pointer ptr or
603 * NULL if there is no entity (or the entity is not constant).
605 * @param ptr the pointer
607 static ir_entity *get_const_entity(ir_node *ptr)
609 if (is_SymConst_addr_ent(ptr)) {
610 ir_entity *ent = get_SymConst_entity(ptr);
612 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
613 /* a constant entity */
620 static ir_tarval *get_initializer_value(ir_initializer_t *const init, ir_mode *const mode)
622 switch (get_initializer_kind(init)) {
623 case IR_INITIALIZER_NULL:
624 return get_mode_null(mode);
626 case IR_INITIALIZER_TARVAL:
627 return get_initializer_tarval_value(init);
629 case IR_INITIALIZER_CONST: {
630 ir_node *const irn = get_initializer_const_value(init);
632 return get_Const_tarval(irn);
636 case IR_INITIALIZER_COMPOUND:
640 return get_tarval_undefined();
643 static bool initializer_val_is_null(ir_initializer_t *init)
647 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
650 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
651 tv = get_initializer_tarval_value(init);
652 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
653 ir_node *irn = get_initializer_const_value(init);
656 tv = get_Const_tarval(irn);
661 return tarval_is_null(tv);
665 * Calculate the value of strlen if possible.
667 * @param ent the entity
668 * @param res_tp the result type
670 * @return a Const node containing the strlen() result or NULL
671 * if the evaluation fails
673 static ir_node *eval_strlen(ir_graph *irg, ir_entity *ent, ir_type *res_tp)
675 ir_type *tp = get_entity_type(ent);
677 ir_initializer_t *initializer;
681 if (! is_Array_type(tp))
683 tp = get_array_element_type(tp);
684 if (! is_Primitive_type(tp))
686 mode = get_type_mode(tp);
688 /* FIXME: This is too restrict, as the type char might be more the 8bits */
689 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
692 initializer = get_entity_initializer(ent);
693 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
696 size = get_initializer_compound_n_entries(initializer);
697 for (i = 0; i < size; ++i) {
698 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
699 if (initializer_val_is_null(val)) {
700 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
701 return new_r_Const(irg, tv);
708 int i_mapper_strlen(ir_node *call, void *ctx)
710 ir_node *s = get_Call_param(call, 0);
711 ir_entity *ent = get_const_entity(s);
715 /* FIXME: this cannot handle constant strings inside struct initializers yet */
717 /* a constant entity */
718 ir_type *tp = get_Call_type(call);
721 tp = get_method_res_type(tp, 0);
722 irn = eval_strlen(get_irn_irg(call), ent, tp);
725 ir_node *mem = get_Call_mem(call);
726 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
727 replace_call(irn, call, mem, NULL, NULL);
735 * Calculate the value of strlen if possible.
737 * @param left the left entity
738 * @param right the right entity
739 * @param res_tp the result type
741 * @return a Const node containing the strcmp() result or NULL
742 * if the evaluation fails
744 static ir_node *eval_strcmp(ir_graph *irg, ir_entity *left, ir_entity *right,
749 ir_initializer_t *init_l;
750 ir_initializer_t *init_r;
756 tp = get_entity_type(left);
757 if (! is_Array_type(tp))
759 tp = get_array_element_type(tp);
760 if (! is_Primitive_type(tp))
762 mode = get_type_mode(tp);
764 /* FIXME: This is too restrict, as the type char might be more the 8bits */
765 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
768 tp = get_entity_type(right);
769 if (! is_Array_type(tp))
771 tp = get_array_element_type(tp);
772 if (! is_Primitive_type(tp))
774 mode = get_type_mode(tp);
776 /* FIXME: This is too restrict, as the type char might be more the 8bits */
777 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
780 init_l = get_entity_initializer(left);
781 init_r = get_entity_initializer(right);
782 if (get_initializer_kind(init_l) != IR_INITIALIZER_COMPOUND ||
783 get_initializer_kind(init_r) != IR_INITIALIZER_COMPOUND)
786 size_l = get_initializer_compound_n_entries(init_l);
787 size_r = get_initializer_compound_n_entries(init_r);
788 size = size_l < size_r ? size_l : size_r;
790 for (i = 0; i != size; ++i) {
791 ir_initializer_t *const val_l = get_initializer_compound_value(init_l, i);
792 ir_tarval *const tv_l = get_initializer_value(val_l, mode);
793 ir_initializer_t *const val_r = get_initializer_compound_value(init_r, i);
794 ir_tarval *const tv_r = get_initializer_value(val_r, mode);
796 if (!tarval_is_constant(tv_l) || !tarval_is_constant(tv_r))
800 ir_mode *const res_mode = get_type_mode(res_tp);
801 ir_tarval *const res_l = tarval_convert_to(tv_l, res_mode);
802 ir_tarval *const res_r = tarval_convert_to(tv_r, res_mode);
803 ir_tarval *const tv = tarval_sub(res_l, res_r, res_mode);
804 return new_r_Const(irg, tv);
807 if (tarval_is_null(tv_l)) {
808 ir_tarval *const tv = get_mode_null(get_type_mode(res_tp));
809 return new_r_Const(irg, tv);
817 * Checks if an entity represents the empty string.
819 * @param ent the entity
821 * @return non-zero if ent represents the empty string
823 static int is_empty_string(ir_entity *ent)
825 ir_type *tp = get_entity_type(ent);
827 ir_initializer_t *initializer;
828 ir_initializer_t *init0;
830 if (! is_Array_type(tp))
832 tp = get_array_element_type(tp);
833 if (! is_Primitive_type(tp))
835 mode = get_type_mode(tp);
837 /* FIXME: This is too restrict, as the type char might be more the 8bits */
838 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
841 initializer = get_entity_initializer(ent);
842 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
845 if (get_initializer_compound_n_entries(initializer) < 1)
848 init0 = get_initializer_compound_value(initializer, 0);
849 return initializer_val_is_null(init0);
852 int i_mapper_strcmp(ir_node *call, void *ctx)
854 ir_node *left = get_Call_param(call, 0);
855 ir_node *right = get_Call_param(call, 1);
859 ir_type *call_tp = get_Call_type(call);
860 ir_type *res_tp = get_method_res_type(call_tp, 0);
861 ir_entity *ent_l, *ent_r;
867 /* do some type checks first */
868 if (! is_Primitive_type(res_tp))
870 char_tp = get_method_param_type(call_tp, 0);
871 if (char_tp != get_method_param_type(call_tp, 1))
873 if (! is_Pointer_type(char_tp))
875 char_tp = get_pointer_points_to_type(char_tp);
878 /* a strcmp(s, s) ==> 0 */
879 ir_graph *irg = get_irn_irg(call);
880 ir_node *mem = get_Call_mem(call);
881 ir_mode *mode = get_type_mode(res_tp);
883 irn = new_r_Const(irg, get_mode_null(mode));
884 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
885 replace_call(irn, call, mem, NULL, NULL);
888 ent_l = get_const_entity(left);
889 ent_r = get_const_entity(right);
891 if (ent_l != NULL && ent_r != NULL) {
892 /* both entities are const, try to evaluate */
893 irn = eval_strcmp(get_irn_irg(call), ent_l, ent_r, res_tp);
894 } else if (ent_l != NULL) {
895 if (is_empty_string(ent_l)) {
896 /* s strcmp("", s) ==> -(*s)*/
898 goto replace_by_call;
900 } else if (ent_r != NULL) {
901 if (is_empty_string(ent_r)) {
902 /* s strcmp(s, "") ==> (*s) */
903 ir_node *mem, *block;
909 mem = get_Call_mem(call);
910 block = get_nodes_block(call);
911 dbg = get_irn_dbg_info(call);
912 mode = get_type_mode(char_tp);
914 /* replace the strcmp by (*x) */
915 irn = new_rd_Load(dbg, block, mem, v, mode, cons_none);
916 mem = new_r_Proj(irn, mode_M, pn_Load_M);
917 irn = new_r_Proj(irn, mode, pn_Load_res);
918 if (ir_throws_exception(call)) {
919 exc = new_r_Proj(irn, mode_X, pn_Load_X_except);
920 reg = new_r_Proj(irn, mode_X, pn_Load_X_regular);
921 ir_set_throws_exception(irn, true);
927 /* conv to the result mode */
928 mode = get_type_mode(res_tp);
929 irn = new_rd_Conv(dbg, block, irn, mode);
932 /* negate in the ("", s) case */
933 irn = new_rd_Minus(dbg, block, irn, mode);
939 ir_node *mem = get_Call_mem(call);
940 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
941 replace_call(irn, call, mem, reg, exc);
948 int i_mapper_strncmp(ir_node *call, void *ctx)
950 ir_node *left = get_Call_param(call, 0);
951 ir_node *right = get_Call_param(call, 1);
952 ir_node *len = get_Call_param(call, 2);
956 if (left == right || (is_Const(len) && is_Const_null(len))) {
957 /* a strncmp(s, s, len) ==> 0 OR
958 a strncmp(a, b, 0) ==> 0 */
959 ir_graph *irg = get_irn_irg(call);
960 ir_node *mem = get_Call_mem(call);
961 ir_node *adr = get_Call_ptr(call);
962 ir_entity *ent = get_SymConst_entity(adr);
963 ir_type *call_tp = get_entity_type(ent);
964 ir_type *res_tp = get_method_res_type(call_tp, 0);
965 ir_mode *mode = get_type_mode(res_tp);
967 irn = new_r_Const(irg, get_mode_null(mode));
968 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
969 replace_call(irn, call, mem, NULL, NULL);
975 int i_mapper_strcpy(ir_node *call, void *ctx)
977 ir_node *dst = get_Call_param(call, 0);
978 ir_node *src = get_Call_param(call, 1);
982 /* a strcpy(d, s) ==> d */
983 ir_node *mem = get_Call_mem(call);
984 ir_node *dst = get_Call_param(call, 0);
986 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_STRCPY);
987 replace_call(dst, call, mem, NULL, NULL);
993 int i_mapper_memcpy(ir_node *call, void *ctx)
995 ir_node *dst = get_Call_param(call, 0);
996 ir_node *src = get_Call_param(call, 1);
997 ir_node *len = get_Call_param(call, 2);
1000 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1001 /* a memcpy(d, d, len) ==> d OR
1002 a memcpy(d, s, 0) ==> d */
1003 ir_node *mem = get_Call_mem(call);
1005 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMCPY);
1006 replace_call(dst, call, mem, NULL, NULL);
1012 int i_mapper_mempcpy(ir_node *call, void *ctx)
1014 ir_node *dst = get_Call_param(call, 0);
1015 ir_node *src = get_Call_param(call, 1);
1016 ir_node *len = get_Call_param(call, 2);
1019 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1020 /* a memcpy(d, d, len) ==> d + len OR
1021 a memcpy(d, s, 0) ==> d + 0 */
1022 dbg_info *dbg = get_irn_dbg_info(call);
1023 ir_node *mem = get_Call_mem(call);
1024 ir_node *blk = get_nodes_block(call);
1025 ir_mode *mode = get_irn_mode(dst);
1026 ir_node *res = new_rd_Add(dbg, blk, dst, len, mode);
1028 DBG_OPT_ALGSIM0(call, res, FS_OPT_RTS_MEMPCPY);
1029 replace_call(res, call, mem, NULL, NULL);
1035 int i_mapper_memmove(ir_node *call, void *ctx)
1037 ir_node *dst = get_Call_param(call, 0);
1038 ir_node *src = get_Call_param(call, 1);
1039 ir_node *len = get_Call_param(call, 2);
1042 if (dst == src || (is_Const(len) && is_Const_null(len))) {
1043 /* a memmove(d, d, len) ==> d OR
1044 a memmove(d, s, 0) ==> d */
1045 ir_node *mem = get_Call_mem(call);
1047 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMMOVE);
1048 replace_call(dst, call, mem, NULL, NULL);
1054 int i_mapper_memset(ir_node *call, void *ctx)
1056 ir_node *len = get_Call_param(call, 2);
1059 if (is_Const(len) && is_Const_null(len)) {
1060 /* a memset(d, C, 0) ==> d */
1061 ir_node *mem = get_Call_mem(call);
1062 ir_node *dst = get_Call_param(call, 0);
1064 DBG_OPT_ALGSIM0(call, dst, FS_OPT_RTS_MEMSET);
1065 replace_call(dst, call, mem, NULL, NULL);
1071 int i_mapper_memcmp(ir_node *call, void *ctx)
1073 ir_node *left = get_Call_param(call, 0);
1074 ir_node *right = get_Call_param(call, 1);
1075 ir_node *len = get_Call_param(call, 2);
1079 if (left == right || (is_Const(len) && is_Const_null(len))) {
1080 /* a memcmp(s, s, len) ==> 0 OR
1081 a memcmp(a, b, 0) ==> 0 */
1082 ir_graph *irg = get_irn_irg(call);
1083 ir_node *mem = get_Call_mem(call);
1084 ir_node *adr = get_Call_ptr(call);
1085 ir_entity *ent = get_SymConst_entity(adr);
1086 ir_type *call_tp = get_entity_type(ent);
1087 ir_type *res_tp = get_method_res_type(call_tp, 0);
1088 ir_mode *mode = get_type_mode(res_tp);
1090 irn = new_r_Const(irg, get_mode_null(mode));
1091 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRNCMP);
1092 replace_call(irn, call, mem, NULL, NULL);
1099 * Returns the result mode of a node.
1101 static ir_mode *get_irn_res_mode(ir_node *node)
1103 switch (get_irn_opcode(node)) {
1104 case iro_Load: return get_Load_mode(node);
1105 case iro_Div: return get_Div_resmode(node);
1106 case iro_Mod: return get_Mod_resmode(node);
1107 default: return NULL;
1111 int i_mapper_RuntimeCall(ir_node *node, runtime_rt *rt)
1113 int i, j, arity, first, n_param, n_res;
1116 ir_node *mem, *bl, *call, *addr, *res_proj;
1118 bool throws_exception;
1121 symconst_symbol sym;
1122 ir_mode *mode = get_irn_mode(node);
1124 if (mode != rt->mode)
1126 /* check if the result modes match */
1127 if (mode == mode_T && rt->res_mode != NULL) {
1128 mode = get_irn_res_mode(node);
1129 if (mode != rt->res_mode)
1133 arity = get_irn_arity(node);
1137 mtp = get_entity_type(rt->ent);
1138 n_param = get_method_n_params(mtp);
1139 irg = current_ir_graph;
1141 mem = get_irn_n(node, 0);
1142 if (get_irn_mode(mem) != mode_M) {
1143 mem = new_r_NoMem(irg);
1148 /* check if the modes of the predecessors match the parameter modes */
1149 if (arity - first != n_param)
1152 for (i = first, j = 0; i < arity; ++i, ++j) {
1153 ir_type *param_tp = get_method_param_type(mtp, j);
1154 ir_node *pred = get_irn_n(node, i);
1156 if (get_type_mode(param_tp) != get_irn_mode(pred))
1160 n_res = get_method_n_ress(mtp);
1161 throws_exception = ir_throws_exception(node);
1163 /* step 0: calculate the number of needed Proj's */
1165 n_proj = MAX(n_proj, rt->mem_proj_nr + 1);
1166 n_proj = MAX(n_proj, rt->res_proj_nr + 1);
1167 if (throws_exception) {
1168 n_proj = MAX(n_proj, rt->regular_proj_nr + 1);
1169 n_proj = MAX(n_proj, rt->exc_proj_nr + 1);
1173 if (rt->mode != mode_T) /* must be mode_T */
1178 if (get_type_mode(get_method_res_type(mtp, 0)) != rt->mode)
1182 /* ok, when we are here, the number of predecessors match as well as the parameter modes */
1183 bl = get_nodes_block(node);
1184 op = get_irn_op(node);
1188 NEW_ARR_A(ir_node *, in, n_param);
1189 for (i = 0; i < n_param; ++i)
1190 in[i] = get_irn_n(node, first + i);
1193 /* step 1: create the call */
1194 sym.entity_p = rt->ent;
1195 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1196 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1197 set_irn_pinned(call, get_irn_pinned(node));
1200 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1205 n_proj += n_res - 1;
1208 turn_into_tuple(node, n_proj);
1210 if (rt->mem_proj_nr >= 0)
1211 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1212 if (throws_exception) {
1213 set_Tuple_pred(node, op->pn_x_regular, new_r_Proj(call, mode_X, pn_Call_X_regular));
1214 set_Tuple_pred(node, op->pn_x_except, new_r_Proj(call, mode_X, pn_Call_X_except));
1217 if (rt->res_proj_nr >= 0) {
1218 for (i = 0; i < n_res; ++i) {
1219 ir_mode *mode = get_type_mode(get_method_res_type(mtp, i));
1220 ir_node *proj = new_r_Proj(res_proj, mode, i);
1221 set_Tuple_pred(node, rt->res_proj_nr + i, proj);
1226 /* only one return value supported */
1228 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1230 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1231 res_proj = new_r_Proj(res_proj, mode, 0);
1233 exchange(node, res_proj);
1237 /* should not happen */