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 ir_graph *const irg = get_Block_irg(block);
263 irn = new_rd_Builtin(dbg, block, get_irg_no_mem(irg), 1, &op, ir_bk_bswap, tp);
264 set_irn_pinned(irn, op_pin_state_floats);
265 irn = new_r_Proj(irn, get_irn_mode(op), pn_Builtin_max+1);
266 replace_call(irn, call, mem, NULL, NULL);
270 int i_mapper_alloca(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_node *irn, *exc, *no_exc;
276 dbg_info *dbg = get_irn_dbg_info(call);
279 if (mode_is_signed(get_irn_mode(op))) {
280 ir_mode *mode = get_irn_mode(op);
281 mode = find_unsigned_mode(mode);
283 panic("Cannot find unsigned mode for %M", mode);
285 op = new_rd_Conv(dbg, block, op, mode);
288 irn = new_rd_Alloc(dbg, block, mem, op, get_unknown_type(), stack_alloc);
289 mem = new_rd_Proj(dbg, irn, mode_M, pn_Alloc_M);
290 irn = new_rd_Proj(dbg, irn, get_modeP_data(), pn_Alloc_res);
291 if (ir_throws_exception(call)) {
292 no_exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_regular);
293 exc = new_rd_Proj(dbg, irn, mode_X, pn_Alloc_X_except);
294 ir_set_throws_exception(irn, true);
300 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_ALLOCA);
301 replace_call(irn, call, mem, no_exc, exc);
305 int i_mapper_sqrt(ir_node *call, void *ctx)
309 ir_node *op = get_Call_param(call, 0);
315 tv = get_Const_tarval(op);
316 if (! tarval_is_null(tv) && !tarval_is_one(tv))
319 mem = get_Call_mem(call);
321 /* sqrt(0) = 0, sqrt(1) = 1 */
322 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_SQRT);
323 replace_call(op, call, mem, NULL, NULL);
327 int i_mapper_cbrt(ir_node *call, void *ctx)
331 ir_node *op = get_Call_param(call, 0);
337 tv = get_Const_tarval(op);
338 if (! tarval_is_null(tv) && !tarval_is_one(tv) && !tarval_is_minus_one(tv))
341 mem = get_Call_mem(call);
343 /* cbrt(0) = 0, cbrt(1) = 1, cbrt(-1) = -1 */
344 DBG_OPT_ALGSIM0(call, op, FS_OPT_RTS_CBRT);
345 replace_call(op, call, mem, NULL, NULL);
349 int i_mapper_pow(ir_node *call, void *ctx)
351 ir_node *left = get_Call_param(call, 0);
352 ir_node *right = get_Call_param(call, 1);
353 ir_node *block = get_nodes_block(call);
354 ir_graph *irg = get_irn_irg(block);
355 ir_node *reg_jmp = NULL;
356 ir_node *exc_jmp = NULL;
362 if (is_Const(left) && is_Const_one(left)) {
363 /* pow (1.0, x) = 1.0 */
365 } else if (is_Const(right)) {
366 ir_tarval *tv = get_Const_tarval(right);
367 if (tarval_is_null(tv)) {
368 /* pow(x, 0.0) = 1.0 */
369 ir_mode *mode = get_tarval_mode(tv);
370 irn = new_r_Const(irg, get_mode_one(mode));
371 } else if (tarval_is_one(tv)) {
372 /* pow(x, 1.0) = x */
374 } else if (tarval_is_minus_one(tv)) {
375 /* pow(x, -1.0) = 1/x */
383 mem = get_Call_mem(call);
384 dbg = get_irn_dbg_info(call);
387 ir_mode *result_mode = get_irn_mode(left);
390 ir_mode *mode = result_mode;
391 ir_mode *float_arithmetic = be_get_backend_param()->mode_float_arithmetic;
392 if (float_arithmetic != NULL) {
393 left = new_r_Conv(block, left, float_arithmetic);
394 mode = float_arithmetic;
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);
406 if (result_mode != mode) {
407 irn = new_r_Conv(block, irn, result_mode);
410 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_POW);
411 replace_call(irn, call, mem, reg_jmp, exc_jmp);
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);
433 int i_mapper_exp2(ir_node *call, void *ctx)
435 return i_mapper_exp(call, ctx);
438 int i_mapper_exp10(ir_node *call, void *ctx)
440 return i_mapper_exp(call, ctx);
444 * A mapper for mapping f(0.0) to 0.0.
446 static int i_mapper_zero_to_zero(ir_node *call, void *ctx, int reason)
448 ir_node *val = get_Call_param(call, 0);
451 if (is_Const(val) && is_Const_null(val)) {
453 ir_node *mem = get_Call_mem(call);
454 DBG_OPT_ALGSIM0(call, val, reason);
455 replace_call(val, call, mem, NULL, NULL);
462 * A mapper for mapping f(1.0) to 0.0.
464 static int i_mapper_one_to_zero(ir_node *call, void *ctx, int reason)
466 ir_node *val = get_Call_param(call, 0);
469 if (is_Const(val) && is_Const_one(val)) {
470 /* acos(1.0) = 0.0 */
471 ir_graph *irg = get_irn_irg(val);
472 ir_mode *mode = get_irn_mode(val);
473 ir_node *irn = new_r_Const(irg, get_mode_null(mode));
474 ir_node *mem = get_Call_mem(call);
475 DBG_OPT_ALGSIM0(call, irn, reason);
476 replace_call(irn, call, mem, NULL, NULL);
483 * A mapper for mapping a functions with the following characteristics:
487 static int i_mapper_symmetric_zero_to_one(ir_node *call, void *ctx, int reason)
490 ir_node *val = get_Call_param(call, 0);
494 ir_node *op = get_Conv_op(val);
496 /* f(-x) = f(x) with strictConv */
497 ir_node *block = get_nodes_block(call);
498 ir_mode *mode = get_irn_mode(val);
499 dbg_info *dbg = get_irn_dbg_info(val);
501 op = get_Minus_op(op);
502 val = new_rd_Conv(dbg, block, op, mode);
503 DBG_OPT_ALGSIM2(call, op, call, FS_OPT_RTS_SYMMETRIC);
504 set_Call_param(call, 0, val);
507 } else if (is_Minus(val)) {
509 val = get_Minus_op(val);
510 DBG_OPT_ALGSIM2(call, val, call, FS_OPT_RTS_SYMMETRIC);
511 set_Call_param(call, 0, val);
515 if (is_Const(val) && is_Const_null(val)) {
517 ir_graph *irg = get_irn_irg(val);
518 ir_mode *mode = get_irn_mode(val);
519 ir_node *irn = new_r_Const(irg, get_mode_one(mode));
520 ir_node *mem = get_Call_mem(call);
521 DBG_OPT_ALGSIM0(call, irn, reason);
522 replace_call(irn, call, mem, NULL, NULL);
528 int i_mapper_log(ir_node *call, void *ctx)
531 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
534 int i_mapper_log2(ir_node *call, void *ctx)
536 /* log2(1.0) = 0.0 */
537 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
540 int i_mapper_log10(ir_node *call, void *ctx)
542 /* log10(1.0) = 0.0 */
543 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_LOG);
546 int i_mapper_sin(ir_node *call, void *ctx)
549 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SIN);
552 int i_mapper_cos(ir_node *call, void *ctx)
554 /* cos(0.0) = 1.0, cos(-x) = x */
555 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COS);
558 int i_mapper_tan(ir_node *call, void *ctx)
561 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TAN);
564 int i_mapper_asin(ir_node *call, void *ctx)
566 /* asin(0.0) = 0.0 */
567 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ASIN);
570 int i_mapper_acos(ir_node *call, void *ctx)
572 /* acos(1.0) = 0.0 */
573 return i_mapper_one_to_zero(call, ctx, FS_OPT_RTS_ACOS);
576 int i_mapper_atan(ir_node *call, void *ctx)
578 /* atan(0.0) = 0.0 */
579 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_ATAN);
582 int i_mapper_sinh(ir_node *call, void *ctx)
584 /* sinh(0.0) = 0.0 */
585 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_SINH);
588 int i_mapper_cosh(ir_node *call, void *ctx)
590 /* cosh(0.0) = 1.0, cosh(-x) = x */
591 return i_mapper_symmetric_zero_to_one(call, ctx, FS_OPT_RTS_COSH);
594 int i_mapper_tanh(ir_node *call, void *ctx)
596 /* tanh(0.0) = 0.0 */
597 return i_mapper_zero_to_zero(call, ctx, FS_OPT_RTS_TANH);
601 * Return the const entity that is accessed through the pointer ptr or
602 * NULL if there is no entity (or the entity is not constant).
604 * @param ptr the pointer
606 static ir_entity *get_const_entity(ir_node *ptr)
608 if (is_SymConst_addr_ent(ptr)) {
609 ir_entity *ent = get_SymConst_entity(ptr);
611 if (get_entity_linkage(ent) & IR_LINKAGE_CONSTANT) {
612 /* a constant entity */
619 static ir_tarval *get_initializer_value(ir_initializer_t *const init, ir_mode *const mode)
621 switch (get_initializer_kind(init)) {
622 case IR_INITIALIZER_NULL:
623 return get_mode_null(mode);
625 case IR_INITIALIZER_TARVAL:
626 return get_initializer_tarval_value(init);
628 case IR_INITIALIZER_CONST: {
629 ir_node *const irn = get_initializer_const_value(init);
631 return get_Const_tarval(irn);
635 case IR_INITIALIZER_COMPOUND:
639 return get_tarval_undefined();
642 static bool initializer_val_is_null(ir_initializer_t *init)
646 if (get_initializer_kind(init) == IR_INITIALIZER_NULL)
649 if (get_initializer_kind(init) == IR_INITIALIZER_TARVAL) {
650 tv = get_initializer_tarval_value(init);
651 } else if (get_initializer_kind(init) == IR_INITIALIZER_CONST) {
652 ir_node *irn = get_initializer_const_value(init);
655 tv = get_Const_tarval(irn);
660 return tarval_is_null(tv);
664 * Calculate the value of strlen if possible.
666 * @param ent the entity
667 * @param res_tp the result type
669 * @return a Const node containing the strlen() result or NULL
670 * if the evaluation fails
672 static ir_node *eval_strlen(ir_graph *irg, ir_entity *ent, ir_type *res_tp)
674 ir_type *tp = get_entity_type(ent);
676 ir_initializer_t *initializer;
680 if (! is_Array_type(tp))
682 tp = get_array_element_type(tp);
683 if (! is_Primitive_type(tp))
685 mode = get_type_mode(tp);
687 /* FIXME: This is too restrict, as the type char might be more the 8bits */
688 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
691 initializer = get_entity_initializer(ent);
692 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
695 size = get_initializer_compound_n_entries(initializer);
696 for (i = 0; i < size; ++i) {
697 ir_initializer_t *val = get_initializer_compound_value(initializer, i);
698 if (initializer_val_is_null(val)) {
699 ir_tarval *tv = new_tarval_from_long(i, get_type_mode(res_tp));
700 return new_r_Const(irg, tv);
707 int i_mapper_strlen(ir_node *call, void *ctx)
709 ir_node *s = get_Call_param(call, 0);
710 ir_entity *ent = get_const_entity(s);
714 /* FIXME: this cannot handle constant strings inside struct initializers yet */
716 /* a constant entity */
717 ir_type *tp = get_Call_type(call);
720 tp = get_method_res_type(tp, 0);
721 irn = eval_strlen(get_irn_irg(call), ent, tp);
724 ir_node *mem = get_Call_mem(call);
725 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRLEN);
726 replace_call(irn, call, mem, NULL, NULL);
734 * Calculate the value of strlen if possible.
736 * @param left the left entity
737 * @param right the right entity
738 * @param res_tp the result type
740 * @return a Const node containing the strcmp() result or NULL
741 * if the evaluation fails
743 static ir_node *eval_strcmp(ir_graph *irg, ir_entity *left, ir_entity *right,
748 ir_initializer_t *init_l;
749 ir_initializer_t *init_r;
755 tp = get_entity_type(left);
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 tp = get_entity_type(right);
768 if (! is_Array_type(tp))
770 tp = get_array_element_type(tp);
771 if (! is_Primitive_type(tp))
773 mode = get_type_mode(tp);
775 /* FIXME: This is too restrict, as the type char might be more the 8bits */
776 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
779 init_l = get_entity_initializer(left);
780 init_r = get_entity_initializer(right);
781 if (get_initializer_kind(init_l) != IR_INITIALIZER_COMPOUND ||
782 get_initializer_kind(init_r) != IR_INITIALIZER_COMPOUND)
785 size_l = get_initializer_compound_n_entries(init_l);
786 size_r = get_initializer_compound_n_entries(init_r);
787 size = size_l < size_r ? size_l : size_r;
789 for (i = 0; i != size; ++i) {
790 ir_initializer_t *const val_l = get_initializer_compound_value(init_l, i);
791 ir_tarval *const tv_l = get_initializer_value(val_l, mode);
792 ir_initializer_t *const val_r = get_initializer_compound_value(init_r, i);
793 ir_tarval *const tv_r = get_initializer_value(val_r, mode);
795 if (!tarval_is_constant(tv_l) || !tarval_is_constant(tv_r))
799 ir_mode *const res_mode = get_type_mode(res_tp);
800 ir_tarval *const res_l = tarval_convert_to(tv_l, res_mode);
801 ir_tarval *const res_r = tarval_convert_to(tv_r, res_mode);
802 ir_tarval *const tv = tarval_sub(res_l, res_r, res_mode);
803 return new_r_Const(irg, tv);
806 if (tarval_is_null(tv_l)) {
807 ir_tarval *const tv = get_mode_null(get_type_mode(res_tp));
808 return new_r_Const(irg, tv);
816 * Checks if an entity represents the empty string.
818 * @param ent the entity
820 * @return non-zero if ent represents the empty string
822 static int is_empty_string(ir_entity *ent)
824 ir_type *tp = get_entity_type(ent);
826 ir_initializer_t *initializer;
827 ir_initializer_t *init0;
829 if (! is_Array_type(tp))
831 tp = get_array_element_type(tp);
832 if (! is_Primitive_type(tp))
834 mode = get_type_mode(tp);
836 /* FIXME: This is too restrict, as the type char might be more the 8bits */
837 if (!mode_is_int(mode) || get_mode_size_bits(mode) != 8)
840 initializer = get_entity_initializer(ent);
841 if (get_initializer_kind(initializer) != IR_INITIALIZER_COMPOUND)
844 if (get_initializer_compound_n_entries(initializer) < 1)
847 init0 = get_initializer_compound_value(initializer, 0);
848 return initializer_val_is_null(init0);
851 int i_mapper_strcmp(ir_node *call, void *ctx)
853 ir_node *left = get_Call_param(call, 0);
854 ir_node *right = get_Call_param(call, 1);
858 ir_type *call_tp = get_Call_type(call);
859 ir_type *res_tp = get_method_res_type(call_tp, 0);
860 ir_entity *ent_l, *ent_r;
866 /* do some type checks first */
867 if (! is_Primitive_type(res_tp))
869 char_tp = get_method_param_type(call_tp, 0);
870 if (char_tp != get_method_param_type(call_tp, 1))
872 if (! is_Pointer_type(char_tp))
874 char_tp = get_pointer_points_to_type(char_tp);
876 ir_node *mem = get_Call_mem(call);
878 /* a strcmp(s, s) ==> 0 */
879 ir_graph *irg = get_irn_irg(call);
880 ir_mode *mode = get_type_mode(res_tp);
882 irn = new_r_Const(irg, get_mode_null(mode));
883 DBG_OPT_ALGSIM0(call, irn, FS_OPT_RTS_STRCMP);
884 replace_call(irn, call, mem, NULL, NULL);
887 ent_l = get_const_entity(left);
888 ent_r = get_const_entity(right);
890 if (ent_l != NULL && ent_r != NULL) {
891 /* both entities are const, try to evaluate */
892 irn = eval_strcmp(get_irn_irg(call), ent_l, ent_r, res_tp);
893 } else if (ent_l != NULL) {
894 if (is_empty_string(ent_l)) {
895 /* s strcmp("", s) ==> -(*s)*/
897 goto replace_by_call;
899 } else if (ent_r != NULL) {
900 if (is_empty_string(ent_r)) {
901 /* s strcmp(s, "") ==> (*s) */
908 mem = get_Call_mem(call);
909 block = get_nodes_block(call);
910 dbg = get_irn_dbg_info(call);
911 mode = get_type_mode(char_tp);
913 /* replace the strcmp by (*x) */
914 irn = new_rd_Load(dbg, block, mem, v, mode, cons_none);
915 mem = new_r_Proj(irn, mode_M, pn_Load_M);
916 irn = new_r_Proj(irn, mode, pn_Load_res);
917 if (ir_throws_exception(call)) {
918 exc = new_r_Proj(irn, mode_X, pn_Load_X_except);
919 reg = new_r_Proj(irn, mode_X, pn_Load_X_regular);
920 ir_set_throws_exception(irn, true);
926 /* conv to the result mode */
927 mode = get_type_mode(res_tp);
928 irn = new_rd_Conv(dbg, block, irn, mode);
931 /* negate in the ("", s) case */
932 irn = new_rd_Minus(dbg, block, irn, mode);
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, *call, *addr, *res_proj;
1116 bool throws_exception;
1118 symconst_symbol sym;
1119 ir_mode *mode = get_irn_mode(node);
1121 if (mode != rt->mode)
1123 /* check if the result modes match */
1124 if (mode == mode_T && rt->res_mode != NULL) {
1125 mode = get_irn_res_mode(node);
1126 if (mode != rt->res_mode)
1130 arity = get_irn_arity(node);
1134 mtp = get_entity_type(rt->ent);
1135 n_param = get_method_n_params(mtp);
1136 ir_node *const bl = get_nodes_block(node);
1137 ir_graph *const irg = get_Block_irg(bl);
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 op = get_irn_op(node);
1185 NEW_ARR_A(ir_node *, in, n_param);
1186 for (i = 0; i < n_param; ++i)
1187 in[i] = get_irn_n(node, first + i);
1190 /* step 1: create the call */
1191 sym.entity_p = rt->ent;
1192 addr = new_r_SymConst(irg, mode_P_code, sym, symconst_addr_ent);
1193 call = new_rd_Call(get_irn_dbg_info(node), bl, mem, addr, n_param, in, mtp);
1194 set_irn_pinned(call, get_irn_pinned(node));
1197 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1202 n_proj += n_res - 1;
1205 turn_into_tuple(node, n_proj);
1207 if (rt->mem_proj_nr >= 0)
1208 set_Tuple_pred(node, rt->mem_proj_nr, new_r_Proj(call, mode_M, pn_Call_M));
1209 if (throws_exception) {
1210 set_Tuple_pred(node, op->pn_x_regular, new_r_Proj(call, mode_X, pn_Call_X_regular));
1211 set_Tuple_pred(node, op->pn_x_except, new_r_Proj(call, mode_X, pn_Call_X_except));
1214 if (rt->res_proj_nr >= 0) {
1215 for (i = 0; i < n_res; ++i) {
1216 ir_mode *mode = get_type_mode(get_method_res_type(mtp, i));
1217 ir_node *proj = new_r_Proj(res_proj, mode, i);
1218 set_Tuple_pred(node, rt->res_proj_nr + i, proj);
1223 /* only one return value supported */
1225 ir_mode *mode = get_type_mode(get_method_res_type(mtp, 0));
1227 res_proj = new_r_Proj(call, mode_T, pn_Call_T_result);
1228 res_proj = new_r_Proj(res_proj, mode, 0);
1230 exchange(node, res_proj);
1234 /* should not happen */