2 * This file is part of cparser.
3 * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
26 #include <libfirm/firm.h>
27 #include <libfirm/adt/obst.h>
31 #include "adt/error.h"
32 #include "adt/array.h"
38 #include "diagnostic.h"
39 #include "lang_features.h"
41 #include "driver/firm_opt.h"
42 #include "driver/firm_cmdline.h"
44 #define MAGIC_DEFAULT_PN_NUMBER (long) -314159265
46 static ir_type *ir_type_const_char;
47 static ir_type *ir_type_wchar_t;
48 static ir_type *ir_type_void;
49 static ir_type *ir_type_int;
51 static type_t *type_const_char;
53 static int next_value_number_function;
54 static ir_node *continue_label;
55 static ir_node *break_label;
56 static ir_node *current_switch_cond;
57 static bool saw_default_label;
58 static ir_node **imature_blocks;
60 static const declaration_t *current_function_decl;
61 static ir_node *current_function_name;
62 static ir_node *current_funcsig;
64 static struct obstack asm_obst;
66 typedef enum declaration_kind_t {
67 DECLARATION_KIND_UNKNOWN,
68 DECLARATION_KIND_FUNCTION,
69 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
70 DECLARATION_KIND_GLOBAL_VARIABLE,
71 DECLARATION_KIND_LOCAL_VARIABLE,
72 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
73 DECLARATION_KIND_COMPOUND_MEMBER,
74 DECLARATION_KIND_LABEL_BLOCK,
75 DECLARATION_KIND_ENUM_ENTRY
78 static ir_type *get_ir_type(type_t *type);
79 static int count_decls_in_stmts(const statement_t *stmt);
81 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
83 const declaration_t *declaration = get_irg_loc_description(irg, pos);
85 warningf(&declaration->source_position,
86 "variable '%#T' might be used uninitialized",
87 declaration->type, declaration->symbol);
88 return new_r_Unknown(irg, mode);
91 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
93 const source_position_t *pos = (const source_position_t*) dbg;
96 return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
100 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
102 const source_position_t *pos = (const source_position_t*) dbg;
107 return pos->input_name;
110 static dbg_info *get_dbg_info(const source_position_t *pos)
112 return (dbg_info*) pos;
115 static unsigned unique_id = 0;
117 static ident *unique_ident(const char *tag)
121 snprintf(buf, sizeof(buf), "%s.%u", tag, unique_id);
123 return new_id_from_str(buf);
127 * Return the signed integer mode of size bytes.
129 * @param size the size
131 static ir_mode *get_smode(unsigned size)
133 static ir_mode *s_modes[16 + 1] = {0, };
136 if (size <= 0 || size > 16)
145 snprintf(name, sizeof(name), "i%u", bits);
146 res = new_ir_mode(name, irms_int_number, bits, 1, irma_twos_complement,
147 bits <= machine_size ? machine_size : bits );
155 * Return the unsigned integer mode of size bytes.
157 * @param size the size
159 static ir_mode *get_umode(unsigned size)
161 static ir_mode *u_modes[16 + 1] = {0, };
164 if (size <= 0 || size > 16)
173 snprintf(name, sizeof(name), "u%u", bits);
174 res = new_ir_mode(name, irms_int_number, bits, 0, irma_twos_complement,
175 bits <= machine_size ? machine_size : bits );
183 * Return the pointer mode of size bytes.
185 * @param size the size
187 static ir_mode *get_ptrmode(unsigned size, char *name)
189 static ir_mode *p_modes[16 + 1] = {0, };
192 if (size <= 0 || size > 16)
202 snprintf(buf, sizeof(buf), "p%u", bits);
205 res = new_ir_mode(name, irms_reference, bits, 0, irma_twos_complement,
206 bits <= machine_size ? machine_size : bits);
210 set_reference_mode_signed_eq(res, get_smode(size));
211 set_reference_mode_unsigned_eq(res, get_umode(size));
216 static ir_mode *_atomic_modes[ATOMIC_TYPE_LAST+1];
218 static ir_mode *mode_int, *mode_uint;
220 static ir_node *expression_to_firm(const expression_t *expression);
221 static inline ir_mode *get_ir_mode(type_t *type);
224 * Initialises the atomic modes depending on the machine size.
226 static void init_atomic_modes(void) {
227 unsigned int_size = machine_size < 32 ? 2 : 4;
228 unsigned long_size = machine_size < 64 ? 4 : 8;
229 unsigned llong_size = machine_size < 32 ? 4 : 8;
231 /* firm has no real void... */
232 _atomic_modes[ATOMIC_TYPE_VOID] = mode_T;
233 _atomic_modes[ATOMIC_TYPE_CHAR] = char_is_signed ? get_smode(1) : get_umode(1);
234 _atomic_modes[ATOMIC_TYPE_SCHAR] = get_smode(1);
235 _atomic_modes[ATOMIC_TYPE_UCHAR] = get_umode(1);
236 _atomic_modes[ATOMIC_TYPE_SHORT] = get_smode(2);
237 _atomic_modes[ATOMIC_TYPE_USHORT] = get_umode(2);
238 _atomic_modes[ATOMIC_TYPE_INT] = get_smode(int_size);
239 _atomic_modes[ATOMIC_TYPE_UINT] = get_umode(int_size);
240 _atomic_modes[ATOMIC_TYPE_LONG] = get_smode(long_size);
241 _atomic_modes[ATOMIC_TYPE_ULONG] = get_umode(long_size);
242 _atomic_modes[ATOMIC_TYPE_LONGLONG] = get_smode(llong_size);
243 _atomic_modes[ATOMIC_TYPE_ULONGLONG] = get_umode(llong_size);
244 _atomic_modes[ATOMIC_TYPE_FLOAT] = mode_F;
245 _atomic_modes[ATOMIC_TYPE_DOUBLE] = mode_D;
246 _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE] = mode_E;
247 _atomic_modes[ATOMIC_TYPE_BOOL] = get_umode(int_size);
249 _atomic_modes[ATOMIC_TYPE_BOOL] = _atomic_modes[ATOMIC_TYPE_INT];
250 _atomic_modes[ATOMIC_TYPE_FLOAT_IMAGINARY] = _atomic_modes[ATOMIC_TYPE_FLOAT];
251 _atomic_modes[ATOMIC_TYPE_DOUBLE_IMAGINARY] = _atomic_modes[ATOMIC_TYPE_DOUBLE];
252 _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY] = _atomic_modes[ATOMIC_TYPE_LONG_DOUBLE];
254 /* Hmm, pointers should be machine size */
255 set_modeP_data(get_ptrmode(machine_size >> 3, NULL));
256 set_modeP_code(get_ptrmode(machine_size >> 3, NULL));
258 mode_int = _atomic_modes[ATOMIC_TYPE_INT];
259 mode_uint = _atomic_modes[ATOMIC_TYPE_UINT];
262 static ir_mode *get_atomic_mode(const atomic_type_t* atomic_type)
265 if ((unsigned)atomic_type->akind <= (unsigned)ATOMIC_TYPE_LAST)
266 res = _atomic_modes[(unsigned)atomic_type->akind];
268 panic("Encountered unknown atomic type");
272 static unsigned get_compound_type_size(compound_type_t *type)
274 ir_type *irtype = get_ir_type((type_t*) type);
275 return get_type_size_bytes(irtype);
278 static unsigned get_array_type_size(array_type_t *type)
280 assert(!type->is_vla);
281 ir_type *irtype = get_ir_type((type_t*) type);
282 return get_type_size_bytes(irtype);
286 static unsigned get_type_size_const(type_t *type)
288 type = skip_typeref(type);
292 panic("error type occured");
294 return get_atomic_type_size(type->atomic.akind);
296 return get_mode_size_bytes(mode_int);
297 case TYPE_COMPOUND_UNION:
298 case TYPE_COMPOUND_STRUCT:
299 return get_compound_type_size(&type->compound);
301 /* just a pointer to the function */
302 return get_mode_size_bytes(mode_P_code);
304 return get_mode_size_bytes(mode_P_data);
306 return get_array_type_size(&type->array);
308 return get_type_size_const(type->builtin.real_type);
310 panic("type size of bitfield request");
316 panic("Trying to determine size of invalid type");
319 static ir_node *get_type_size(type_t *type)
321 type = skip_typeref(type);
323 if(is_type_array(type) && type->array.is_vla) {
324 ir_node *size_node = type->array.size_node;
325 if(size_node == NULL) {
326 size_node = expression_to_firm(type->array.size_expression);
327 assert(!is_Const(size_node));
328 type->array.size_node = size_node;
331 ir_node *elem_size = get_type_size(type->array.element_type);
332 ir_mode *mode = get_irn_mode(size_node);
333 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
337 ir_mode *mode = get_ir_mode(type_size_t);
339 sym.type_p = get_ir_type(type);
340 return new_SymConst(mode, sym, symconst_type_size);
343 static unsigned count_parameters(const function_type_t *function_type)
347 function_parameter_t *parameter = function_type->parameters;
348 for ( ; parameter != NULL; parameter = parameter->next) {
356 static ir_type *create_atomic_type(const atomic_type_t *type)
358 dbg_info *dbgi = get_dbg_info(&type->type.source_position);
359 ir_mode *mode = get_atomic_mode(type);
360 ident *id = get_mode_ident(mode);
361 ir_type *irtype = new_d_type_primitive(id, mode, dbgi);
363 /* TODO: this is x86 specific, we should fiddle this into
364 * lang_features.h somehow... */
365 if(type->akind == ATOMIC_TYPE_LONG_DOUBLE
366 || type->akind == ATOMIC_TYPE_DOUBLE
367 || type->akind == ATOMIC_TYPE_LONGLONG
368 || type->akind == ATOMIC_TYPE_ULONGLONG) {
369 set_type_alignment_bytes(irtype, 4);
375 static ir_type *create_method_type(const function_type_t *function_type)
377 type_t *return_type = function_type->return_type;
379 ident *id = unique_ident("functiontype");
380 int n_parameters = count_parameters(function_type);
381 int n_results = return_type == type_void ? 0 : 1;
382 dbg_info *dbgi = get_dbg_info(&function_type->type.source_position);
383 ir_type *irtype = new_d_type_method(id, n_parameters, n_results, dbgi);
385 if(return_type != type_void) {
386 ir_type *restype = get_ir_type(return_type);
387 set_method_res_type(irtype, 0, restype);
390 function_parameter_t *parameter = function_type->parameters;
392 for( ; parameter != NULL; parameter = parameter->next) {
393 ir_type *p_irtype = get_ir_type(parameter->type);
394 set_method_param_type(irtype, n, p_irtype);
398 if(function_type->variadic || function_type->unspecified_parameters) {
399 set_method_variadicity(irtype, variadicity_variadic);
405 static ir_type *create_pointer_type(pointer_type_t *type)
407 type_t *points_to = type->points_to;
408 ir_type *ir_points_to;
409 /* Avoid endless recursion if the points_to type contains this poiner type
410 * again (might be a struct). We therefore first create a void* pointer
411 * and then set the real points_to type
413 dbg_info *dbgi = get_dbg_info(&type->type.source_position);
414 ir_type *ir_type = new_d_type_pointer(unique_ident("pointer"),
415 ir_type_void, mode_P_data, dbgi);
416 type->type.firm_type = ir_type;
418 ir_points_to = get_ir_type(points_to);
419 set_pointer_points_to_type(ir_type, ir_points_to);
424 static ir_type *create_array_type(array_type_t *type)
426 type_t *element_type = type->element_type;
427 ir_type *ir_element_type = get_ir_type(element_type);
429 ident *id = unique_ident("array");
430 dbg_info *dbgi = get_dbg_info(&type->type.source_position);
431 ir_type *ir_type = new_d_type_array(id, 1, ir_element_type, dbgi);
433 const int align = get_type_alignment_bytes(ir_element_type);
434 set_type_alignment_bytes(ir_type, align);
436 if(type->size_constant) {
437 int n_elements = type->size;
439 set_array_bounds_int(ir_type, 0, 0, n_elements);
441 size_t elemsize = get_type_size_bytes(ir_element_type);
442 if(elemsize % align > 0) {
443 elemsize += align - (elemsize % align);
445 set_type_size_bytes(ir_type, n_elements * elemsize);
447 set_array_lower_bound_int(ir_type, 0, 0);
449 set_type_state(ir_type, layout_fixed);
455 * Return the signed integer type of size bits.
457 * @param size the size
459 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
462 static ir_mode *s_modes[64 + 1] = {NULL, };
466 if (size <= 0 || size > 64)
469 mode = s_modes[size];
473 snprintf(name, sizeof(name), "bf_I%u", size);
474 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
475 size <= 32 ? 32 : size );
476 s_modes[size] = mode;
480 snprintf(name, sizeof(name), "I%u", size);
481 ident *id = new_id_from_str(name);
482 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
483 res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
484 set_primitive_base_type(res, base_tp);
490 * Return the unsigned integer type of size bits.
492 * @param size the size
494 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
497 static ir_mode *u_modes[64 + 1] = {NULL, };
501 if (size <= 0 || size > 64)
504 mode = u_modes[size];
508 snprintf(name, sizeof(name), "bf_U%u", size);
509 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
510 size <= 32 ? 32 : size );
511 u_modes[size] = mode;
516 snprintf(name, sizeof(name), "U%u", size);
517 ident *id = new_id_from_str(name);
518 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
519 res = new_d_type_primitive(mangle_u(get_type_ident(base_tp), id), mode, dbgi);
520 set_primitive_base_type(res, base_tp);
525 static ir_type *create_bitfield_type(bitfield_type_t *const type)
527 type_t *base = skip_typeref(type->base);
528 assert(base->kind == TYPE_ATOMIC);
529 ir_type *irbase = get_ir_type(base);
531 unsigned size = fold_constant(type->size);
533 assert(!is_type_float(base));
534 if(is_type_signed(base)) {
535 return get_signed_int_type_for_bit_size(irbase, size);
537 return get_unsigned_int_type_for_bit_size(irbase, size);
541 #define INVALID_TYPE ((ir_type_ptr)-1)
543 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
544 size_t *outer_offset, size_t *outer_align);
546 static ir_type *create_struct_type(compound_type_t *type, ir_type *irtype,
547 size_t *outer_offset, size_t *outer_align)
549 declaration_t *declaration = type->declaration;
550 if(declaration->v.irtype != NULL) {
551 return declaration->v.irtype;
554 size_t align_all = 1;
556 size_t bit_offset = 0;
558 symbol_t *symbol = declaration->symbol;
561 id = unique_ident(symbol->string);
563 id = unique_ident("__anonymous_struct");
565 dbg_info *dbgi = get_dbg_info(&type->type.source_position);
567 irtype = new_d_type_struct(id, dbgi);
569 declaration->v.irtype = irtype;
570 type->type.firm_type = irtype;
572 offset = *outer_offset;
573 align_all = *outer_align;
576 declaration_t *entry = declaration->scope.declarations;
577 for( ; entry != NULL; entry = entry->next) {
578 if(entry->namespc != NAMESPACE_NORMAL)
581 symbol_t *symbol = entry->symbol;
582 type_t *entry_type = skip_typeref(entry->type);
583 dbg_info *dbgi = get_dbg_info(&entry->source_position);
586 ident = new_id_from_str(symbol->string);
588 if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
589 create_struct_type(&entry_type->compound, irtype, &offset,
592 } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
593 create_union_type(&entry_type->compound, irtype, &offset,
597 assert(entry_type->kind == TYPE_BITFIELD);
599 ident = unique_ident("anon");
602 ir_type *base_irtype;
603 if(entry_type->kind == TYPE_BITFIELD) {
604 base_irtype = get_ir_type(entry_type->bitfield.base);
606 base_irtype = get_ir_type(entry_type);
609 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
610 size_t misalign = offset % entry_alignment;
612 ir_type *entry_irtype = get_ir_type(entry_type);
613 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
616 size_t bits_remainder;
617 if(entry_type->kind == TYPE_BITFIELD) {
618 size_t size_bits = fold_constant(entry_type->bitfield.size);
619 size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
621 if(size_bits > rest_size_bits) {
622 /* start a new bucket */
623 offset += entry_alignment - misalign;
629 /* put into current bucket */
630 base = offset - misalign;
631 bits_remainder = misalign * 8 + bit_offset;
634 offset += size_bits / 8;
635 bit_offset = bit_offset + (size_bits % 8);
637 size_t entry_size = get_type_size_bytes(base_irtype);
638 if(misalign > 0 || bit_offset > 0)
639 offset += entry_alignment - misalign;
643 offset += entry_size;
647 if(entry_alignment > align_all) {
648 if(entry_alignment % align_all != 0) {
649 panic("uneven alignments not supported yet");
651 align_all = entry_alignment;
654 set_entity_offset(entity, base);
655 set_entity_offset_bits_remainder(entity,
656 (unsigned char) bits_remainder);
657 //add_struct_member(irtype, entity);
658 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
659 assert(entry->v.entity == NULL);
660 entry->v.entity = entity;
663 size_t misalign = offset % align_all;
664 if(misalign > 0 || bit_offset > 0) {
665 offset += align_all - misalign;
668 if(outer_offset != NULL) {
669 *outer_offset = offset;
670 *outer_align = align_all;
672 set_type_alignment_bytes(irtype, align_all);
673 set_type_size_bytes(irtype, offset);
674 set_type_state(irtype, layout_fixed);
680 static ir_type *create_union_type(compound_type_t *type, ir_type *irtype,
681 size_t *outer_offset, size_t *outer_align)
683 declaration_t *declaration = type->declaration;
684 if(declaration->v.irtype != NULL) {
685 return declaration->v.irtype;
688 size_t align_all = 1;
693 symbol_t *symbol = declaration->symbol;
696 id = unique_ident(symbol->string);
698 id = unique_ident("__anonymous_union");
700 dbg_info *dbgi = get_dbg_info(&type->type.source_position);
702 irtype = new_d_type_union(id, dbgi);
704 declaration->v.irtype = irtype;
705 type->type.firm_type = irtype;
707 offset = *outer_offset;
708 align_all = *outer_align;
711 type->type.firm_type = irtype;
713 declaration_t *entry = declaration->scope.declarations;
714 for( ; entry != NULL; entry = entry->next) {
715 if(entry->namespc != NAMESPACE_NORMAL)
718 symbol_t *symbol = entry->symbol;
719 type_t *entry_type = skip_typeref(entry->type);
720 ir_type *entry_ir_type = get_ir_type(entry_type);
724 ident = new_id_from_str(entry->symbol->string);
726 size_t offs = offset;
727 if(entry_type->kind == TYPE_COMPOUND_STRUCT) {
728 create_struct_type(&entry_type->compound, irtype, &offs,
731 } else if(entry_type->kind == TYPE_COMPOUND_UNION) {
732 create_union_type(&entry_type->compound, irtype, &offs,
736 panic("anonymous union member must be struct or union");
738 size_t entry_size = offs - offset;
739 if(entry_size > size) {
742 ident = unique_ident("anon");
745 size_t entry_size = get_type_size_bytes(entry_ir_type);
746 size_t entry_alignment = get_type_alignment_bytes(entry_ir_type);
748 dbg_info *const dbgi = get_dbg_info(&entry->source_position);
749 ir_entity *const entity = new_d_entity(irtype, ident, entry_ir_type,
751 //add_union_member(irtype, entity);
752 set_entity_offset(entity, 0);
753 entry->declaration_kind = DECLARATION_KIND_COMPOUND_MEMBER;
754 assert(entry->v.entity == NULL);
755 entry->v.entity = entity;
757 if(entry_size > size) {
760 if(entry_alignment > align_all) {
761 if(entry_alignment % align_all != 0) {
762 panic("Uneven alignments not supported yet");
764 align_all = entry_alignment;
768 if(outer_offset != NULL) {
769 assert(*outer_offset == offset);
771 size_t misalign = offset % align_all;
773 size += align_all - misalign;
774 *outer_offset += size;
776 if(align_all > *outer_align) {
777 if(align_all % *outer_align != 0) {
778 panic("uneven alignments not supported yet");
780 *outer_align = align_all;
783 set_type_alignment_bytes(irtype, align_all);
784 set_type_size_bytes(irtype, size);
785 set_type_state(irtype, layout_fixed);
786 declaration->v.irtype = irtype;
792 static ir_type *create_enum_type(enum_type_t *const type)
794 type->type.firm_type = ir_type_int;
796 ir_mode *const mode = mode_int;
797 tarval *const one = get_mode_one(mode);
798 tarval * tv_next = get_tarval_null(mode);
800 declaration_t *declaration = type->declaration->next;
801 for (; declaration != NULL; declaration = declaration->next) {
802 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY)
805 declaration->declaration_kind = DECLARATION_KIND_ENUM_ENTRY;
807 expression_t *const init = declaration->init.enum_value;
809 ir_node *const cnst = expression_to_firm(init);
810 if (!is_Const(cnst)) {
811 panic("couldn't fold constant");
813 tv_next = get_Const_tarval(cnst);
815 declaration->v.enum_val = tv_next;
816 tv_next = tarval_add(tv_next, one);
822 static ir_type *get_ir_type(type_t *type)
824 assert(type != NULL);
826 type = skip_typeref(type);
828 if(type->base.firm_type != NULL) {
829 assert(type->base.firm_type != INVALID_TYPE);
830 return type->base.firm_type;
833 ir_type *firm_type = NULL;
836 panic("error type occured");
838 firm_type = create_atomic_type(&type->atomic);
841 firm_type = create_method_type(&type->function);
844 firm_type = create_pointer_type(&type->pointer);
847 firm_type = create_array_type(&type->array);
849 case TYPE_COMPOUND_STRUCT:
850 firm_type = create_struct_type(&type->compound, NULL, NULL, NULL);
852 case TYPE_COMPOUND_UNION:
853 firm_type = create_union_type(&type->compound, NULL, NULL, NULL);
856 firm_type = create_enum_type(&type->enumt);
859 firm_type = get_ir_type(type->builtin.real_type);
862 firm_type = create_bitfield_type(&type->bitfield);
870 if(firm_type == NULL)
871 panic("unknown type found");
873 type->base.firm_type = firm_type;
877 static inline ir_mode *get_ir_mode(type_t *type)
879 ir_type *irtype = get_ir_type(type);
881 /* firm doesn't report a mode for arrays somehow... */
882 if(is_Array_type(irtype)) {
886 ir_mode *mode = get_type_mode(irtype);
887 assert(mode != NULL);
891 static ident *predef_idents[rts_max];
893 /** Names of the runtime functions. */
894 static const struct {
895 int id; /**< the rts id */
896 int n_res; /**< number of return values */
897 const char *name; /**< the name of the rts function */
898 int n_params; /**< number of parameters */
899 unsigned flags; /**< language flags */
901 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
902 { rts_abort, 0, "abort", 0, _C89 },
903 { rts_abs, 1, "abs", 1, _C89 },
904 { rts_labs, 1, "labs", 1, _C89 },
905 { rts_llabs, 1, "llabs", 1, _C99 },
906 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
908 { rts_fabs, 1, "fabs", 1, _C89 },
909 { rts_sqrt, 1, "sqrt", 1, _C89 },
910 { rts_cbrt, 1, "cbrt", 1, _C99 },
911 { rts_exp, 1, "exp", 1, _C89 },
912 { rts_exp2, 1, "exp2", 1, _C89 },
913 { rts_exp10, 1, "exp10", 1, _GNUC },
914 { rts_log, 1, "log", 1, _C89 },
915 { rts_log2, 1, "log2", 1, _C89 },
916 { rts_log10, 1, "log10", 1, _C89 },
917 { rts_pow, 1, "pow", 2, _C89 },
918 { rts_sin, 1, "sin", 1, _C89 },
919 { rts_cos, 1, "cos", 1, _C89 },
920 { rts_tan, 1, "tan", 1, _C89 },
921 { rts_asin, 1, "asin", 1, _C89 },
922 { rts_acos, 1, "acos", 1, _C89 },
923 { rts_atan, 1, "atan", 1, _C89 },
924 { rts_sinh, 1, "sinh", 1, _C89 },
925 { rts_cosh, 1, "cosh", 1, _C89 },
926 { rts_tanh, 1, "tanh", 1, _C89 },
928 { rts_fabsf, 1, "fabsf", 1, _C99 },
929 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
930 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
931 { rts_expf, 1, "expf", 1, _C99 },
932 { rts_exp2f, 1, "exp2f", 1, _C99 },
933 { rts_exp10f, 1, "exp10f", 1, _GNUC },
934 { rts_logf, 1, "logf", 1, _C99 },
935 { rts_log2f, 1, "log2f", 1, _C99 },
936 { rts_log10f, 1, "log10f", 1, _C99 },
937 { rts_powf, 1, "powf", 2, _C99 },
938 { rts_sinf, 1, "sinf", 1, _C99 },
939 { rts_cosf, 1, "cosf", 1, _C99 },
940 { rts_tanf, 1, "tanf", 1, _C99 },
941 { rts_asinf, 1, "asinf", 1, _C99 },
942 { rts_acosf, 1, "acosf", 1, _C99 },
943 { rts_atanf, 1, "atanf", 1, _C99 },
944 { rts_sinhf, 1, "sinhf", 1, _C99 },
945 { rts_coshf, 1, "coshf", 1, _C99 },
946 { rts_tanhf, 1, "tanhf", 1, _C99 },
948 { rts_fabsl, 1, "fabsl", 1, _C99 },
949 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
950 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
951 { rts_expl, 1, "expl", 1, _C99 },
952 { rts_exp2l, 1, "exp2l", 1, _C99 },
953 { rts_exp10l, 1, "exp10l", 1, _GNUC },
954 { rts_logl, 1, "logl", 1, _C99 },
955 { rts_log2l, 1, "log2l", 1, _C99 },
956 { rts_log10l, 1, "log10l", 1, _C99 },
957 { rts_powl, 1, "powl", 2, _C99 },
958 { rts_sinl, 1, "sinl", 1, _C99 },
959 { rts_cosl, 1, "cosl", 1, _C99 },
960 { rts_tanl, 1, "tanl", 1, _C99 },
961 { rts_asinl, 1, "asinl", 1, _C99 },
962 { rts_acosl, 1, "acosl", 1, _C99 },
963 { rts_atanl, 1, "atanl", 1, _C99 },
964 { rts_sinhl, 1, "sinhl", 1, _C99 },
965 { rts_coshl, 1, "coshl", 1, _C99 },
966 { rts_tanhl, 1, "tanhl", 1, _C99 },
968 { rts_memcpy, 1, "memcpy", 3, _C89 }, /* HMM, man say its C99 */
969 { rts_memset, 1, "memset", 3, _C89 }, /* HMM, man say its C99 */
970 { rts_strcmp, 1, "strcmp", 2, _C89 },
971 { rts_strncmp, 1, "strncmp", 3, _C89 }
974 static ir_entity* get_function_entity(declaration_t *declaration)
976 if(declaration->declaration_kind == DECLARATION_KIND_FUNCTION)
977 return declaration->v.entity;
978 assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
980 symbol_t *symbol = declaration->symbol;
981 ident *id = new_id_from_str(symbol->string);
983 ir_type *global_type = get_glob_type();
984 ir_type *ir_type_method = get_ir_type(declaration->type);
985 assert(is_Method_type(ir_type_method));
987 dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
988 ir_entity *const entity = new_d_entity(global_type, id, ir_type_method, dbgi);
989 set_entity_ld_ident(entity, id);
990 if(declaration->storage_class == STORAGE_CLASS_STATIC
991 || declaration->is_inline) {
992 set_entity_visibility(entity, visibility_local);
993 } else if(declaration->init.statement != NULL) {
994 set_entity_visibility(entity, visibility_external_visible);
996 set_entity_visibility(entity, visibility_external_allocated);
998 /* We should check for file scope here, but as long as we compile C only
999 this is not needed. */
1000 int n_params = get_method_n_params(ir_type_method);
1001 int n_res = get_method_n_ress(ir_type_method);
1004 if (n_params == 0 && n_res == 0 && id == predef_idents[rts_abort]) {
1005 /* found abort(), store for later */
1009 if (! firm_opt.freestanding) {
1010 /* check for a known runtime function */
1011 for (i = 0; i < rts_max; ++i) {
1012 /* ignore those rts functions not necessary needed for current mode */
1013 if ((c_mode & rts_data[i].flags) == 0)
1015 if (n_params == rts_data[i].n_params && n_res == rts_data[i].n_res &&
1016 id == predef_idents[rts_data[i].id])
1017 rts_entities[rts_data[i].id] = entity;
1022 set_entity_allocation(entity, allocation_static);
1024 declaration->declaration_kind = DECLARATION_KIND_FUNCTION;
1025 declaration->v.entity = entity;
1030 static ir_node *const_to_firm(const const_expression_t *cnst)
1032 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1033 ir_mode *mode = get_ir_mode(cnst->base.type);
1038 if(mode_is_float(mode)) {
1039 tv = new_tarval_from_double(cnst->v.float_value, mode);
1041 if(mode_is_signed(mode)) {
1042 len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1044 len = snprintf(buf, sizeof(buf), "%llu",
1045 (unsigned long long) cnst->v.int_value);
1047 tv = new_tarval_from_str(buf, len, mode);
1050 return new_d_Const(dbgi, mode, tv);
1053 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1055 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1056 ir_mode *mode = get_ir_mode(cnst->base.type);
1058 long long int v = 0;
1059 for (size_t i = 0; i < cnst->v.character.size; ++i) {
1060 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1063 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1064 tarval *tv = new_tarval_from_str(buf, len, mode);
1066 return new_d_Const(dbgi, mode, tv);
1069 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1071 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1072 ir_mode *mode = get_ir_mode(cnst->base.type);
1074 long long int v = cnst->v.wide_character.begin[0];
1077 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1078 tarval *tv = new_tarval_from_str(buf, len, mode);
1080 return new_d_Const(dbgi, mode, tv);
1083 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1086 assert(entity != NULL);
1087 union symconst_symbol sym;
1088 sym.entity_p = entity;
1089 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1092 static ir_node *string_to_firm(const source_position_t *const src_pos,
1093 const char *const id_prefix,
1094 const string_t *const value)
1096 ir_type *const global_type = get_glob_type();
1097 dbg_info *const dbgi = get_dbg_info(src_pos);
1098 ir_type *const type = new_d_type_array(unique_ident("strtype"), 1,
1099 ir_type_const_char, dbgi);
1101 ident *const id = unique_ident(id_prefix);
1102 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1103 set_entity_ld_ident(entity, id);
1104 set_entity_variability(entity, variability_constant);
1105 set_entity_allocation(entity, allocation_static);
1107 ir_type *const elem_type = ir_type_const_char;
1108 ir_mode *const mode = get_type_mode(elem_type);
1110 const char* const string = value->begin;
1111 const size_t slen = value->size;
1113 set_array_lower_bound_int(type, 0, 0);
1114 set_array_upper_bound_int(type, 0, slen);
1115 set_type_size_bytes(type, slen);
1116 set_type_state(type, layout_fixed);
1118 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1119 for(size_t i = 0; i < slen; ++i) {
1120 tvs[i] = new_tarval_from_long(string[i], mode);
1123 set_array_entity_values(entity, tvs, slen);
1126 return create_symconst(dbgi, mode_P_data, entity);
1129 static ir_node *string_literal_to_firm(
1130 const string_literal_expression_t* literal)
1132 return string_to_firm(&literal->base.source_position, "Lstr",
1136 static ir_node *wide_string_literal_to_firm(
1137 const wide_string_literal_expression_t* const literal)
1139 ir_type *const global_type = get_glob_type();
1140 ir_type *const elem_type = ir_type_wchar_t;
1141 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1142 ir_type *const type = new_d_type_array(unique_ident("strtype"), 1,
1145 ident *const id = unique_ident("Lstr");
1146 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1147 set_entity_ld_ident(entity, id);
1148 set_entity_variability(entity, variability_constant);
1149 set_entity_allocation(entity, allocation_static);
1151 ir_mode *const mode = get_type_mode(elem_type);
1153 const wchar_rep_t *const string = literal->value.begin;
1154 const size_t slen = literal->value.size;
1156 set_array_lower_bound_int(type, 0, 0);
1157 set_array_upper_bound_int(type, 0, slen);
1158 set_type_size_bytes(type, slen);
1159 set_type_state(type, layout_fixed);
1161 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1162 for(size_t i = 0; i < slen; ++i) {
1163 tvs[i] = new_tarval_from_long(string[i], mode);
1166 set_array_entity_values(entity, tvs, slen);
1169 return create_symconst(dbgi, mode_P_data, entity);
1172 static ir_node *deref_address(type_t *const type, ir_node *const addr,
1173 dbg_info *const dbgi)
1175 ir_type *irtype = get_ir_type(type);
1176 if (is_compound_type(irtype)
1177 || is_Method_type(irtype)
1178 || is_Array_type(irtype)) {
1182 ir_mode *const mode = get_type_mode(irtype);
1183 ir_node *const memory = get_store();
1184 ir_node *const load = new_d_Load(dbgi, memory, addr, mode);
1185 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1186 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1188 if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1189 set_Load_volatility(load, volatility_is_volatile);
1192 set_store(load_mem);
1196 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1198 ir_mode *mode = get_irn_mode(node);
1200 if(!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1202 if(!mode_is_float(mode))
1205 /* check if there is already a Conv */
1206 if (get_irn_op(node) == op_Conv) {
1207 /* convert it into a strict Conv */
1208 set_Conv_strict(node, 1);
1212 /* otherwise create a new one */
1213 return new_d_strictConv(dbgi, node, mode);
1216 static ir_node *get_global_var_address(dbg_info *const dbgi,
1217 const declaration_t *const decl)
1219 assert(decl->declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1221 ir_entity *const entity = decl->v.entity;
1222 switch ((storage_class_tag_t)decl->storage_class) {
1223 case STORAGE_CLASS_THREAD:
1224 case STORAGE_CLASS_THREAD_EXTERN:
1225 case STORAGE_CLASS_THREAD_STATIC: {
1226 ir_node *const no_mem = new_NoMem();
1227 ir_node *const tls = get_irg_tls(current_ir_graph);
1228 return new_d_simpleSel(dbgi, no_mem, tls, entity);
1232 return create_symconst(dbgi, mode_P_data, entity);
1236 /* Returns the correct base address depending on whether it is a parameter or a
1237 * normal local variable */
1238 static ir_node *get_local_frame(ir_entity *const ent)
1240 ir_graph *const irg = current_ir_graph;
1241 const ir_type *const owner = get_entity_owner(ent);
1242 if (owner == get_irg_frame_type(irg)) {
1243 return get_irg_frame(irg);
1245 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1246 return get_irg_value_param_base(irg);
1250 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1252 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1253 declaration_t *declaration = ref->declaration;
1254 type_t *type = skip_typeref(declaration->type);
1256 switch((declaration_kind_t) declaration->declaration_kind) {
1257 case DECLARATION_KIND_UNKNOWN:
1258 if (declaration->storage_class != STORAGE_CLASS_ENUM_ENTRY) {
1264 case DECLARATION_KIND_ENUM_ENTRY: {
1265 ir_mode *const mode = get_ir_mode(type);
1266 return new_Const(mode, declaration->v.enum_val);
1269 case DECLARATION_KIND_LOCAL_VARIABLE: {
1270 ir_mode *const mode = get_ir_mode(type);
1271 return get_value(declaration->v.value_number, mode);
1273 case DECLARATION_KIND_FUNCTION: {
1274 ir_mode *const mode = get_ir_mode(type);
1275 return create_symconst(dbgi, mode, declaration->v.entity);
1277 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1278 ir_node *const addr = get_global_var_address(dbgi, declaration);
1279 return deref_address(declaration->type, addr, dbgi);
1282 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1283 ir_entity *entity = declaration->v.entity;
1284 ir_node *frame = get_local_frame(entity);
1285 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1286 return deref_address(declaration->type, sel, dbgi);
1289 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1290 return declaration->v.vla_base;
1292 case DECLARATION_KIND_COMPOUND_MEMBER:
1293 case DECLARATION_KIND_LABEL_BLOCK:
1294 panic("not implemented reference type");
1297 panic("reference to declaration with unknown type found");
1300 static ir_node *reference_addr(const reference_expression_t *ref)
1302 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1303 declaration_t *declaration = ref->declaration;
1305 switch((declaration_kind_t) declaration->declaration_kind) {
1306 case DECLARATION_KIND_UNKNOWN:
1308 case DECLARATION_KIND_LOCAL_VARIABLE:
1309 panic("local variable without entity has no address");
1310 case DECLARATION_KIND_FUNCTION: {
1311 type_t *const type = skip_typeref(ref->base.type);
1312 ir_mode *const mode = get_ir_mode(type);
1313 return create_symconst(dbgi, mode, declaration->v.entity);
1315 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1316 ir_node *const addr = get_global_var_address(dbgi, declaration);
1319 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1320 ir_entity *entity = declaration->v.entity;
1321 ir_node *frame = get_local_frame(entity);
1322 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
1327 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1328 return declaration->v.vla_base;
1330 case DECLARATION_KIND_ENUM_ENTRY:
1331 panic("trying to reference enum entry");
1333 case DECLARATION_KIND_COMPOUND_MEMBER:
1334 case DECLARATION_KIND_LABEL_BLOCK:
1335 panic("not implemented reference type");
1338 panic("reference to declaration with unknown type found");
1341 static ir_node *process_builtin_call(const call_expression_t *call)
1343 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1345 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1346 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1348 type_t *type = skip_typeref(builtin->base.type);
1349 assert(is_type_pointer(type));
1351 type_t *function_type = skip_typeref(type->pointer.points_to);
1352 symbol_t *symbol = builtin->symbol;
1354 switch(symbol->ID) {
1355 case T___builtin_alloca: {
1356 if(call->arguments == NULL || call->arguments->next != NULL) {
1357 panic("invalid number of parameters on __builtin_alloca");
1359 expression_t *argument = call->arguments->expression;
1360 ir_node *size = expression_to_firm(argument);
1362 ir_node *store = get_store();
1363 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1365 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1367 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1371 case T___builtin_nan:
1372 case T___builtin_nanf:
1373 case T___builtin_nand: {
1374 /* Ignore string for now... */
1375 assert(is_type_function(function_type));
1376 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1377 tarval *tv = get_mode_NAN(mode);
1378 ir_node *res = new_d_Const(dbgi, mode, tv);
1381 case T___builtin_va_end:
1384 panic("Unsupported builtin found\n");
1388 static ir_node *call_expression_to_firm(const call_expression_t *call)
1390 assert(get_cur_block() != NULL);
1392 expression_t *function = call->function;
1393 if(function->kind == EXPR_BUILTIN_SYMBOL) {
1394 return process_builtin_call(call);
1396 ir_node *callee = expression_to_firm(function);
1398 type_t *type = skip_typeref(function->base.type);
1399 assert(is_type_pointer(type));
1400 pointer_type_t *pointer_type = &type->pointer;
1401 type_t *points_to = skip_typeref(pointer_type->points_to);
1402 assert(is_type_function(points_to));
1403 function_type_t *function_type = &points_to->function;
1405 int n_parameters = 0;
1406 call_argument_t *argument = call->arguments;
1407 for( ; argument != NULL; argument = argument->next) {
1411 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1413 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1414 ir_type *new_method_type = NULL;
1415 if(function_type->variadic || function_type->unspecified_parameters) {
1416 /* we need to construct a new method type matching the call
1418 int n_res = get_method_n_ress(ir_method_type);
1419 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1420 new_method_type = new_d_type_method(unique_ident("calltype"),
1421 n_parameters, n_res, dbgi);
1422 set_method_calling_convention(new_method_type,
1423 get_method_calling_convention(ir_method_type));
1424 set_method_additional_properties(new_method_type,
1425 get_method_additional_properties(ir_method_type));
1427 for(int i = 0; i < n_res; ++i) {
1428 set_method_res_type(new_method_type, i,
1429 get_method_res_type(ir_method_type, i));
1432 ir_node *in[n_parameters];
1434 argument = call->arguments;
1436 for( ; argument != NULL; argument = argument->next) {
1437 expression_t *expression = argument->expression;
1438 ir_node *arg_node = expression_to_firm(expression);
1440 arg_node = do_strict_conv(dbgi, arg_node);
1443 if(new_method_type != NULL) {
1444 ir_type *irtype = get_ir_type(expression->base.type);
1445 set_method_param_type(new_method_type, n, irtype);
1450 assert(n == n_parameters);
1452 if(new_method_type != NULL)
1453 ir_method_type = new_method_type;
1455 ir_node *store = get_store();
1456 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1458 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1461 type_t *return_type = skip_typeref(function_type->return_type);
1462 ir_node *result = NULL;
1464 if(!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1466 if(is_type_scalar(return_type)) {
1467 mode = get_ir_mode(return_type);
1471 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1472 result = new_d_Proj(dbgi, resproj, mode, 0);
1478 static void statement_to_firm(statement_t *statement);
1479 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1481 static ir_node *expression_to_addr(const expression_t *expression);
1482 static void create_condition_evaluation(const expression_t *expression,
1483 ir_node *true_block,
1484 ir_node *false_block);
1486 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1489 value = do_strict_conv(dbgi, value);
1491 ir_node *memory = get_store();
1493 if(is_type_scalar(type)) {
1494 ir_node *store = new_d_Store(dbgi, memory, addr, value);
1495 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1496 if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE)
1497 set_Store_volatility(store, volatility_is_volatile);
1498 set_store(store_mem);
1500 ir_type *irtype = get_ir_type(type);
1501 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1502 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1503 set_store(copyb_mem);
1507 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1509 tarval *all_one = get_mode_all_one(mode);
1510 int mode_size = get_mode_size_bits(mode);
1512 assert(offset >= 0 && size >= 0);
1513 assert(offset + size <= mode_size);
1514 if(size == mode_size) {
1518 long shiftr = get_mode_size_bits(mode) - size;
1519 long shiftl = offset;
1520 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1521 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1522 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1523 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1528 static void bitfield_store_to_firm(const unary_expression_t *expression,
1531 expression_t *select = expression->value;
1532 assert(select->kind == EXPR_SELECT);
1533 type_t *type = select->base.type;
1534 assert(type->kind == TYPE_BITFIELD);
1535 ir_mode *mode = get_ir_mode(type->bitfield.base);
1536 ir_node *addr = expression_to_addr(select);
1538 assert(get_irn_mode(value) == mode);
1540 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1542 /* kill upper bits of value and shift to right position */
1543 ir_entity *entity = select->select.compound_entry->v.entity;
1544 int bitoffset = get_entity_offset_bits_remainder(entity);
1545 ir_type *entity_type = get_entity_type(entity);
1546 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1548 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1549 ir_node *mask_node = new_d_Const(dbgi, mode, mask);
1550 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1551 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1552 ir_node *shiftcount = new_d_Const(dbgi, mode_uint, shiftl);
1553 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1555 /* load current value */
1556 ir_node *mem = get_store();
1557 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1558 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1559 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1560 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1561 tarval *inv_mask = tarval_not(shift_mask);
1562 ir_node *inv_mask_node = new_d_Const(dbgi, mode, inv_mask);
1563 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1565 /* construct new value and store */
1566 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1567 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val);
1568 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1569 set_store(store_mem);
1571 if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
1572 set_Load_volatility(load, volatility_is_volatile);
1573 set_Store_volatility(store, volatility_is_volatile);
1577 static void set_value_for_expression(const expression_t *expression,
1580 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1581 value = do_strict_conv(dbgi, value);
1583 if(expression->kind == EXPR_REFERENCE) {
1584 const reference_expression_t *ref = &expression->reference;
1586 declaration_t *declaration = ref->declaration;
1587 assert(declaration->declaration_kind != DECLARATION_KIND_UNKNOWN);
1588 if(declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1589 set_value(declaration->v.value_number, value);
1594 if(expression->kind == EXPR_UNARY_BITFIELD_EXTRACT) {
1595 bitfield_store_to_firm(&expression->unary, value);
1599 ir_node *addr = expression_to_addr(expression);
1600 type_t *type = skip_typeref(expression->base.type);
1601 assign_value(dbgi, addr, type, value);
1604 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1606 ir_mode *value_mode = get_irn_mode(value);
1608 if (value_mode == dest_mode || is_Bad(value))
1611 if(dest_mode == mode_b) {
1612 ir_node *zero = new_Const(value_mode, get_mode_null(value_mode));
1613 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
1614 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1618 return new_d_Conv(dbgi, value, dest_mode);
1621 static ir_node *create_incdec(const unary_expression_t *expression)
1623 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1624 type_t *type = skip_typeref(expression->base.type);
1625 ir_mode *mode = get_ir_mode(type);
1626 expression_t *value = expression->value;
1628 ir_node *value_node = expression_to_firm(value);
1631 if(is_type_pointer(type)) {
1632 pointer_type_t *pointer_type = &type->pointer;
1633 offset = get_type_size(pointer_type->points_to);
1635 assert(is_type_arithmetic(type));
1636 offset = new_Const(mode, get_mode_one(mode));
1639 switch(expression->base.kind) {
1640 case EXPR_UNARY_POSTFIX_INCREMENT: {
1641 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1642 set_value_for_expression(value, new_value);
1645 case EXPR_UNARY_POSTFIX_DECREMENT: {
1646 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1647 set_value_for_expression(value, new_value);
1650 case EXPR_UNARY_PREFIX_INCREMENT: {
1651 ir_node *new_value = new_d_Add(dbgi, value_node, offset, mode);
1652 set_value_for_expression(value, new_value);
1655 case EXPR_UNARY_PREFIX_DECREMENT: {
1656 ir_node *new_value = new_d_Sub(dbgi, value_node, offset, mode);
1657 set_value_for_expression(value, new_value);
1661 panic("no incdec expr in create_incdec");
1666 static bool is_local_variable(expression_t *expression)
1668 if (expression->kind != EXPR_REFERENCE)
1670 reference_expression_t *ref_expr = &expression->reference;
1671 declaration_t *declaration = ref_expr->declaration;
1672 return declaration->declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE;
1675 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
1678 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
1679 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
1680 case EXPR_BINARY_NOTEQUAL:
1681 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
1682 case EXPR_BINARY_ISLESS:
1683 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
1684 case EXPR_BINARY_ISLESSEQUAL:
1685 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
1686 case EXPR_BINARY_ISGREATER:
1687 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
1688 case EXPR_BINARY_ISGREATEREQUAL:
1689 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
1690 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
1695 panic("trying to get pn_Cmp from non-comparison binexpr type");
1699 * Handle the assume optimizer hint: check if a Confirm
1700 * node can be created.
1702 * @param dbi debug info
1703 * @param expr the IL assume expression
1705 * we support here only some simple cases:
1710 static ir_node *handle_assume_compare(dbg_info *dbi,
1711 const binary_expression_t *expression)
1713 expression_t *op1 = expression->left;
1714 expression_t *op2 = expression->right;
1715 declaration_t *var2, *var = NULL;
1716 ir_node *res = NULL;
1719 cmp_val = get_pnc(expression->base.kind, op1->base.type);
1721 if (is_local_variable(op1) && is_local_variable(op2)) {
1722 var = op1->reference.declaration;
1723 var2 = op2->reference.declaration;
1725 type_t *const type = skip_typeref(var->type);
1726 ir_mode *const mode = get_ir_mode(type);
1728 ir_node *const irn1 = get_value(var->v.value_number, mode);
1729 ir_node *const irn2 = get_value(var2->v.value_number, mode);
1731 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
1732 set_value(var2->v.value_number, res);
1734 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
1735 set_value(var->v.value_number, res);
1741 if (is_local_variable(op1) && is_constant_expression(op2)) {
1742 var = op1->reference.declaration;
1744 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
1745 cmp_val = get_inversed_pnc(cmp_val);
1746 var = op2->reference.declaration;
1751 type_t *const type = skip_typeref(var->type);
1752 ir_mode *const mode = get_ir_mode(type);
1754 res = get_value(var->v.value_number, mode);
1755 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
1756 set_value(var->v.value_number, res);
1762 * Handle the assume optimizer hint.
1764 * @param dbi debug info
1765 * @param expr the IL assume expression
1767 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
1768 switch(expression->kind) {
1769 case EXPR_BINARY_EQUAL:
1770 case EXPR_BINARY_NOTEQUAL:
1771 case EXPR_BINARY_LESS:
1772 case EXPR_BINARY_LESSEQUAL:
1773 case EXPR_BINARY_GREATER:
1774 case EXPR_BINARY_GREATEREQUAL:
1775 return handle_assume_compare(dbi, &expression->binary);
1781 static ir_node *bitfield_extract_to_firm(const unary_expression_t *expression)
1783 expression_t *select = expression->value;
1784 assert(select->kind == EXPR_SELECT);
1786 type_t *type = select->base.type;
1787 assert(type->kind == TYPE_BITFIELD);
1788 ir_mode *mode = get_ir_mode(type->bitfield.base);
1789 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1790 ir_node *addr = expression_to_addr(select);
1791 ir_node *mem = get_store();
1792 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1793 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1794 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1796 load_res = create_conv(dbgi, load_res, mode_int);
1798 set_store(load_mem);
1800 /* kill upper bits */
1801 ir_entity *entity = select->select.compound_entry->v.entity;
1802 int bitoffset = get_entity_offset_bits_remainder(entity);
1803 ir_type *entity_type = get_entity_type(entity);
1804 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1805 long shift_bitsl = machine_size - bitoffset - bitsize;
1806 assert(shift_bitsl >= 0);
1807 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1808 ir_node *countl = new_d_Const(dbgi, mode_uint, tvl);
1809 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1811 long shift_bitsr = bitoffset + shift_bitsl;
1812 assert(shift_bitsr <= (long) machine_size);
1813 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1814 ir_node *countr = new_d_Const(dbgi, mode_uint, tvr);
1816 if(mode_is_signed(mode)) {
1817 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1819 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1822 return create_conv(dbgi, shiftr, mode);
1825 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
1827 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1828 type_t *type = skip_typeref(expression->base.type);
1830 if(expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
1831 return expression_to_addr(expression->value);
1833 const expression_t *value = expression->value;
1835 switch(expression->base.kind) {
1836 case EXPR_UNARY_NEGATE: {
1837 ir_node *value_node = expression_to_firm(value);
1838 ir_mode *mode = get_ir_mode(type);
1839 return new_d_Minus(dbgi, value_node, mode);
1841 case EXPR_UNARY_PLUS:
1842 return expression_to_firm(value);
1843 case EXPR_UNARY_BITWISE_NEGATE: {
1844 ir_node *value_node = expression_to_firm(value);
1845 ir_mode *mode = get_ir_mode(type);
1846 return new_d_Not(dbgi, value_node, mode);
1848 case EXPR_UNARY_NOT: {
1849 ir_node *value_node = expression_to_firm(value);
1850 ir_mode *mode = get_ir_mode(type);
1851 if(get_irn_mode(value_node) != mode_b) {
1852 value_node = create_conv(dbgi, value_node, mode_b);
1854 value_node = new_d_Not(dbgi, value_node, mode_b);
1855 if(mode != mode_b) {
1856 value_node = create_conv(dbgi, value_node, mode);
1860 case EXPR_UNARY_DEREFERENCE: {
1861 ir_node *value_node = expression_to_firm(value);
1862 type_t *value_type = skip_typeref(value->base.type);
1863 assert(is_type_pointer(value_type));
1864 type_t *points_to = value_type->pointer.points_to;
1865 return deref_address(points_to, value_node, dbgi);
1867 case EXPR_UNARY_POSTFIX_INCREMENT:
1868 case EXPR_UNARY_POSTFIX_DECREMENT:
1869 case EXPR_UNARY_PREFIX_INCREMENT:
1870 case EXPR_UNARY_PREFIX_DECREMENT:
1871 return create_incdec(expression);
1872 case EXPR_UNARY_CAST: {
1873 ir_node *value_node = expression_to_firm(value);
1874 if(is_type_scalar(type)) {
1875 ir_mode *mode = get_ir_mode(type);
1876 ir_node *node = create_conv(dbgi, value_node, mode);
1877 node = do_strict_conv(dbgi, node);
1880 /* make sure firm type is constructed */
1881 (void) get_ir_type(type);
1885 case EXPR_UNARY_CAST_IMPLICIT: {
1886 ir_node *value_node = expression_to_firm(value);
1887 if(is_type_scalar(type)) {
1888 ir_mode *mode = get_ir_mode(type);
1889 return create_conv(dbgi, value_node, mode);
1894 case EXPR_UNARY_ASSUME:
1895 if(firm_opt.confirm)
1896 return handle_assume(dbgi, value);
1899 case EXPR_UNARY_BITFIELD_EXTRACT:
1900 return bitfield_extract_to_firm(expression);
1905 panic("invalid UNEXPR type found");
1908 static ir_node *produce_condition_result(const expression_t *expression,
1911 ir_mode *mode = get_ir_mode(expression->base.type);
1912 ir_node *cur_block = get_cur_block();
1914 ir_node *one_block = new_immBlock();
1915 ir_node *one = new_Const(mode, get_mode_one(mode));
1916 ir_node *jmp_one = new_d_Jmp(dbgi);
1918 ir_node *zero_block = new_immBlock();
1919 ir_node *zero = new_Const(mode, get_mode_null(mode));
1920 ir_node *jmp_zero = new_d_Jmp(dbgi);
1922 set_cur_block(cur_block);
1923 create_condition_evaluation(expression, one_block, zero_block);
1924 mature_immBlock(one_block);
1925 mature_immBlock(zero_block);
1927 ir_node *common_block = new_immBlock();
1928 add_immBlock_pred(common_block, jmp_one);
1929 add_immBlock_pred(common_block, jmp_zero);
1930 mature_immBlock(common_block);
1932 ir_node *in[2] = { one, zero };
1933 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
1938 static ir_node *create_lazy_op(const binary_expression_t *expression)
1940 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1941 type_t *type = expression->base.type;
1942 ir_mode *mode = get_ir_mode(type);
1944 if(is_constant_expression(expression->left)) {
1945 long val = fold_constant(expression->left);
1946 expression_kind_t ekind = expression->base.kind;
1947 if((ekind == EXPR_BINARY_LOGICAL_AND && val != 0)
1948 || (ekind == EXPR_BINARY_LOGICAL_OR && val == 0)) {
1949 return expression_to_firm(expression->right);
1951 assert((ekind == EXPR_BINARY_LOGICAL_AND && val == 0)
1952 || (ekind == EXPR_BINARY_LOGICAL_OR && val != 0));
1953 return new_Const(mode, get_mode_one(mode));
1957 return produce_condition_result((const expression_t*) expression, dbgi);
1960 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
1961 ir_node *right, ir_mode *mode);
1963 static ir_node *create_arithmetic_binop(const binary_expression_t *expression,
1964 create_arithmetic_func func)
1966 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1967 ir_node *left = expression_to_firm(expression->left);
1968 ir_node *right = expression_to_firm(expression->right);
1969 type_t *type = expression->right->base.type;
1970 /* be careful with the modes, because in arithmetic assign nodes only
1971 * the right operand has the mode of the arithmetic already */
1972 ir_mode *mode = get_ir_mode(type);
1973 left = create_conv(dbgi, left, mode);
1974 ir_node *res = func(dbgi, left, right, mode);
1979 static ir_node *pointer_arithmetic(ir_node *const pointer,
1982 dbg_info *const dbgi,
1983 const create_arithmetic_func func)
1985 pointer_type_t *const pointer_type = &type->pointer;
1986 type_t *const points_to = pointer_type->points_to;
1987 const unsigned elem_size = get_type_size_const(points_to);
1989 assert(elem_size >= 1);
1990 if (elem_size > 1) {
1991 integer = create_conv(dbgi, integer, mode_int);
1992 ir_node *const cnst = new_Const_long(mode_int, (long)elem_size);
1993 ir_node *const mul = new_d_Mul(dbgi, integer, cnst, mode_int);
1997 ir_mode *const mode = get_ir_mode(type);
1998 return func(dbgi, pointer, integer, mode);
2001 static ir_node *create_arithmetic_assign_binop(
2002 const binary_expression_t *expression, create_arithmetic_func func)
2004 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2005 type_t *const type = skip_typeref(expression->base.type);
2008 if (is_type_pointer(type)) {
2009 ir_node *const pointer = expression_to_firm(expression->left);
2010 ir_node * integer = expression_to_firm(expression->right);
2011 value = pointer_arithmetic(pointer, integer, type, dbgi, func);
2013 value = create_arithmetic_binop(expression, func);
2016 ir_mode *const mode = get_ir_mode(type);
2017 value = create_conv(dbgi, value, mode);
2018 set_value_for_expression(expression->left, value);
2023 static ir_node *create_add(const binary_expression_t *expression)
2025 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2026 ir_node *left = expression_to_firm(expression->left);
2027 ir_node *right = expression_to_firm(expression->right);
2028 type_t *type = expression->base.type;
2030 expression_t *expr_left = expression->left;
2031 expression_t *expr_right = expression->right;
2032 type_t *type_left = skip_typeref(expr_left->base.type);
2033 type_t *type_right = skip_typeref(expr_right->base.type);
2035 if(is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2036 ir_mode *const mode = get_ir_mode(type);
2037 return new_d_Add(dbgi, left, right, mode);
2040 if (is_type_pointer(type_left)) {
2041 return pointer_arithmetic(left, right, type, dbgi, new_d_Add);
2043 assert(is_type_pointer(type_right));
2044 return pointer_arithmetic(right, left, type, dbgi, new_d_Add);
2048 static ir_node *create_sub(const binary_expression_t *expression)
2050 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2051 expression_t *const expr_left = expression->left;
2052 expression_t *const expr_right = expression->right;
2053 ir_node *const left = expression_to_firm(expr_left);
2054 ir_node *const right = expression_to_firm(expr_right);
2055 type_t *const type = expression->base.type;
2056 type_t *const type_left = skip_typeref(expr_left->base.type);
2057 type_t *const type_right = skip_typeref(expr_right->base.type);
2059 if (is_type_arithmetic(type_left) && is_type_arithmetic(type_right)) {
2060 ir_mode *const mode = get_ir_mode(type);
2061 return new_d_Sub(dbgi, left, right, mode);
2062 } else if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2063 const pointer_type_t *const ptr_type = &type_left->pointer;
2065 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2066 ir_mode *const mode = get_ir_mode(type);
2067 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2068 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2069 ir_node *const no_mem = new_NoMem();
2070 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size, mode,
2071 op_pin_state_floats);
2072 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2075 assert(is_type_pointer(type_left));
2076 return pointer_arithmetic(left, right, type_left, dbgi, new_d_Sub);
2079 static ir_node *create_shift(const binary_expression_t *expression)
2081 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2082 ir_node *left = expression_to_firm(expression->left);
2083 ir_node *right = expression_to_firm(expression->right);
2084 type_t *type = expression->base.type;
2085 ir_mode *mode = get_ir_mode(type);
2087 /* firm always wants the shift count to be unsigned */
2088 right = create_conv(dbgi, right, mode_uint);
2092 switch(expression->base.kind) {
2093 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2094 case EXPR_BINARY_SHIFTLEFT:
2095 res = new_d_Shl(dbgi, left, right, mode);
2097 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2098 case EXPR_BINARY_SHIFTRIGHT: {
2099 expression_t *expr_left = expression->left;
2100 type_t *type_left = skip_typeref(expr_left->base.type);
2102 if(is_type_signed(type_left)) {
2103 res = new_d_Shrs(dbgi, left, right, mode);
2105 res = new_d_Shr(dbgi, left, right, mode);
2110 panic("create shift op called for non-shift op");
2117 static ir_node *create_divmod(const binary_expression_t *expression)
2119 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2120 ir_node *left = expression_to_firm(expression->left);
2121 ir_node *right = expression_to_firm(expression->right);
2122 ir_node *pin = new_Pin(new_NoMem());
2123 /* be careful with the modes, because in arithmetic assign nodes only
2124 * the right operand has the mode of the arithmetic already */
2125 type_t *type = expression->right->base.type;
2126 ir_mode *mode = get_ir_mode(type);
2127 left = create_conv(dbgi, left, mode);
2131 switch (expression->base.kind) {
2132 case EXPR_BINARY_DIV:
2133 case EXPR_BINARY_DIV_ASSIGN:
2134 if(mode_is_float(mode)) {
2135 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2136 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2138 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2139 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2143 case EXPR_BINARY_MOD:
2144 case EXPR_BINARY_MOD_ASSIGN:
2145 assert(!mode_is_float(mode));
2146 op = new_d_Mod(dbgi, pin, left, right, mode, op_pin_state_floats);
2147 res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2150 default: panic("unexpected binary expression type in create_divmod()");
2156 static ir_node *create_arithmetic_assign_divmod(
2157 const binary_expression_t *expression)
2159 ir_node * value = create_divmod(expression);
2160 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2161 type_t *const type = expression->base.type;
2162 ir_mode *const mode = get_ir_mode(type);
2164 assert(type->kind != TYPE_POINTER);
2166 value = create_conv(dbgi, value, mode);
2167 set_value_for_expression(expression->left, value);
2172 static ir_node *create_arithmetic_assign_shift(
2173 const binary_expression_t *expression)
2175 ir_node * value = create_shift(expression);
2176 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2177 type_t *const type = expression->base.type;
2178 ir_mode *const mode = get_ir_mode(type);
2180 value = create_conv(dbgi, value, mode);
2181 set_value_for_expression(expression->left, value);
2186 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2188 expression_kind_t kind = expression->base.kind;
2191 case EXPR_BINARY_EQUAL:
2192 case EXPR_BINARY_NOTEQUAL:
2193 case EXPR_BINARY_LESS:
2194 case EXPR_BINARY_LESSEQUAL:
2195 case EXPR_BINARY_GREATER:
2196 case EXPR_BINARY_GREATEREQUAL:
2197 case EXPR_BINARY_ISGREATER:
2198 case EXPR_BINARY_ISGREATEREQUAL:
2199 case EXPR_BINARY_ISLESS:
2200 case EXPR_BINARY_ISLESSEQUAL:
2201 case EXPR_BINARY_ISLESSGREATER:
2202 case EXPR_BINARY_ISUNORDERED: {
2203 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2204 ir_node *left = expression_to_firm(expression->left);
2205 ir_node *right = expression_to_firm(expression->right);
2206 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2207 long pnc = get_pnc(kind, expression->left->base.type);
2208 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2211 case EXPR_BINARY_ASSIGN: {
2212 ir_node *right = expression_to_firm(expression->right);
2213 set_value_for_expression(expression->left, right);
2217 case EXPR_BINARY_ADD:
2218 return create_add(expression);
2219 case EXPR_BINARY_SUB:
2220 return create_sub(expression);
2221 case EXPR_BINARY_MUL:
2222 return create_arithmetic_binop(expression, new_d_Mul);
2223 case EXPR_BINARY_BITWISE_AND:
2224 return create_arithmetic_binop(expression, new_d_And);
2225 case EXPR_BINARY_BITWISE_OR:
2226 return create_arithmetic_binop(expression, new_d_Or);
2227 case EXPR_BINARY_BITWISE_XOR:
2228 return create_arithmetic_binop(expression, new_d_Eor);
2229 case EXPR_BINARY_SHIFTLEFT:
2230 case EXPR_BINARY_SHIFTRIGHT:
2231 return create_shift(expression);
2232 case EXPR_BINARY_DIV:
2233 case EXPR_BINARY_MOD:
2234 return create_divmod(expression);
2235 case EXPR_BINARY_LOGICAL_AND:
2236 case EXPR_BINARY_LOGICAL_OR:
2237 return create_lazy_op(expression);
2238 case EXPR_BINARY_COMMA:
2239 expression_to_firm(expression->left);
2240 return expression_to_firm(expression->right);
2241 case EXPR_BINARY_ADD_ASSIGN:
2242 return create_arithmetic_assign_binop(expression, new_d_Add);
2243 case EXPR_BINARY_SUB_ASSIGN:
2244 return create_arithmetic_assign_binop(expression, new_d_Sub);
2245 case EXPR_BINARY_MUL_ASSIGN:
2246 return create_arithmetic_assign_binop(expression, new_d_Mul);
2247 case EXPR_BINARY_MOD_ASSIGN:
2248 case EXPR_BINARY_DIV_ASSIGN:
2249 return create_arithmetic_assign_divmod(expression);
2250 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2251 return create_arithmetic_assign_binop(expression, new_d_And);
2252 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2253 return create_arithmetic_assign_binop(expression, new_d_Or);
2254 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2255 return create_arithmetic_assign_binop(expression, new_d_Eor);
2256 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2257 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2258 return create_arithmetic_assign_shift(expression);
2259 case EXPR_BINARY_BUILTIN_EXPECT:
2260 return expression_to_firm(expression->left);
2262 panic("TODO binexpr type");
2266 static ir_node *array_access_addr(const array_access_expression_t *expression)
2268 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2269 ir_node *base_addr = expression_to_firm(expression->array_ref);
2270 ir_node *offset = expression_to_firm(expression->index);
2271 offset = create_conv(dbgi, offset, mode_uint);
2273 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2274 assert(is_type_pointer(ref_type));
2275 pointer_type_t *pointer_type = &ref_type->pointer;
2277 ir_node *elem_size_const = get_type_size(pointer_type->points_to);
2278 ir_node *real_offset = new_d_Mul(dbgi, offset, elem_size_const,
2280 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2285 static ir_node *array_access_to_firm(
2286 const array_access_expression_t *expression)
2288 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2289 ir_node *addr = array_access_addr(expression);
2290 type_t *type = revert_automatic_type_conversion(
2291 (const expression_t*) expression);
2292 type = skip_typeref(type);
2294 return deref_address(type, addr, dbgi);
2297 static long get_offsetof_offset(const offsetof_expression_t *expression)
2299 type_t *orig_type = expression->type;
2302 designator_t *designator = expression->designator;
2303 for( ; designator != NULL; designator = designator->next) {
2304 type_t *type = skip_typeref(orig_type);
2305 /* be sure the type is constructed */
2306 (void) get_ir_type(type);
2308 if(designator->symbol != NULL) {
2309 assert(is_type_compound(type));
2310 symbol_t *symbol = designator->symbol;
2312 declaration_t *declaration = type->compound.declaration;
2313 declaration_t *iter = declaration->scope.declarations;
2314 for( ; iter != NULL; iter = iter->next) {
2315 if(iter->symbol == symbol) {
2319 assert(iter != NULL);
2321 assert(iter->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2322 offset += get_entity_offset(iter->v.entity);
2324 orig_type = iter->type;
2326 expression_t *array_index = designator->array_index;
2327 assert(designator->array_index != NULL);
2328 assert(is_type_array(type));
2329 assert(is_type_valid(array_index->base.type));
2331 long index = fold_constant(array_index);
2332 ir_type *arr_type = get_ir_type(type);
2333 ir_type *elem_type = get_array_element_type(arr_type);
2334 long elem_size = get_type_size_bytes(elem_type);
2336 offset += index * elem_size;
2338 orig_type = type->array.element_type;
2345 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2347 ir_mode *mode = get_ir_mode(expression->base.type);
2348 long offset = get_offsetof_offset(expression);
2349 tarval *tv = new_tarval_from_long(offset, mode);
2350 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2352 return new_d_Const(dbgi, mode, tv);
2355 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2356 ir_entity *entity, type_t *type);
2358 static ir_node *compound_literal_to_firm(
2359 const compound_literal_expression_t *expression)
2361 type_t *type = expression->type;
2363 /* create an entity on the stack */
2364 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2366 ident *const id = unique_ident("CompLit");
2367 ir_type *const irtype = get_ir_type(type);
2368 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2369 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2370 set_entity_ld_ident(entity, id);
2372 set_entity_variability(entity, variability_uninitialized);
2374 /* create initialisation code */
2375 initializer_t *initializer = expression->initializer;
2376 create_local_initializer(initializer, dbgi, entity, type);
2378 /* create a sel for the compound literal address */
2379 ir_node *frame = get_local_frame(entity);
2380 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2385 * Transform a sizeof expression into Firm code.
2387 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2389 type_t *type = expression->type;
2391 type = expression->tp_expression->base.type;
2392 assert(type != NULL);
2395 type = skip_typeref(type);
2396 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2397 if(is_type_array(type) && type->array.is_vla
2398 && expression->tp_expression != NULL) {
2399 expression_to_firm(expression->tp_expression);
2402 return get_type_size(type);
2406 * Transform an alignof expression into Firm code.
2408 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2410 type_t *type = expression->type;
2412 /* beware: if expression is a variable reference, return the
2413 alignment of the variable. */
2414 const expression_t *tp_expression = expression->tp_expression;
2415 const declaration_t *declaration = expr_is_variable(tp_expression);
2416 if (declaration != NULL) {
2417 /* TODO: get the alignment of this variable. */
2419 type = tp_expression->base.type;
2420 assert(type != NULL);
2423 ir_mode *const mode = get_ir_mode(expression->base.type);
2424 symconst_symbol sym;
2425 sym.type_p = get_ir_type(type);
2426 return new_SymConst(mode, sym, symconst_type_align);
2429 static void init_ir_types(void);
2430 long fold_constant(const expression_t *expression)
2434 assert(is_constant_expression(expression));
2436 ir_graph *old_current_ir_graph = current_ir_graph;
2437 if(current_ir_graph == NULL) {
2438 current_ir_graph = get_const_code_irg();
2441 ir_node *cnst = expression_to_firm(expression);
2442 current_ir_graph = old_current_ir_graph;
2444 if(!is_Const(cnst)) {
2445 panic("couldn't fold constant\n");
2448 tarval *tv = get_Const_tarval(cnst);
2449 if(!tarval_is_long(tv)) {
2450 panic("result of constant folding is not integer\n");
2453 return get_tarval_long(tv);
2456 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2458 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2460 /* first try to fold a constant condition */
2461 if(is_constant_expression(expression->condition)) {
2462 long val = fold_constant(expression->condition);
2464 return expression_to_firm(expression->true_expression);
2466 return expression_to_firm(expression->false_expression);
2470 ir_node *cur_block = get_cur_block();
2472 /* create the true block */
2473 ir_node *true_block = new_immBlock();
2475 ir_node *true_val = expression_to_firm(expression->true_expression);
2476 ir_node *true_jmp = new_Jmp();
2478 /* create the false block */
2479 ir_node *false_block = new_immBlock();
2481 ir_node *false_val = expression_to_firm(expression->false_expression);
2482 ir_node *false_jmp = new_Jmp();
2484 /* create the condition evaluation */
2485 set_cur_block(cur_block);
2486 create_condition_evaluation(expression->condition, true_block, false_block);
2487 mature_immBlock(true_block);
2488 mature_immBlock(false_block);
2490 /* create the common block */
2491 ir_node *common_block = new_immBlock();
2492 add_immBlock_pred(common_block, true_jmp);
2493 add_immBlock_pred(common_block, false_jmp);
2494 mature_immBlock(common_block);
2496 /* TODO improve static semantics, so either both or no values are NULL */
2497 if (true_val == NULL || false_val == NULL)
2500 ir_node *in[2] = { true_val, false_val };
2501 ir_mode *mode = get_irn_mode(true_val);
2502 assert(get_irn_mode(false_val) == mode);
2503 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2508 static ir_node *select_addr(const select_expression_t *expression)
2510 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2512 ir_node *compound_addr = expression_to_firm(expression->compound);
2514 declaration_t *entry = expression->compound_entry;
2515 assert(entry->declaration_kind == DECLARATION_KIND_COMPOUND_MEMBER);
2516 ir_entity *entity = entry->v.entity;
2518 assert(entity != NULL);
2520 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), compound_addr, entity);
2525 static ir_node *select_to_firm(const select_expression_t *expression)
2527 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2528 ir_node *addr = select_addr(expression);
2529 type_t *type = revert_automatic_type_conversion(
2530 (const expression_t*) expression);
2531 type = skip_typeref(type);
2533 return deref_address(type, addr, dbgi);
2536 /* Values returned by __builtin_classify_type. */
2537 typedef enum gcc_type_class
2543 enumeral_type_class,
2546 reference_type_class,
2550 function_type_class,
2561 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2563 const type_t *const type = skip_typeref(expr->type_expression->base.type);
2569 const atomic_type_t *const atomic_type = &type->atomic;
2570 switch ((atomic_type_kind_t) atomic_type->akind) {
2571 /* should not be reached */
2572 case ATOMIC_TYPE_INVALID:
2576 /* gcc cannot do that */
2577 case ATOMIC_TYPE_VOID:
2578 tc = void_type_class;
2581 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2582 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2583 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2584 case ATOMIC_TYPE_SHORT:
2585 case ATOMIC_TYPE_USHORT:
2586 case ATOMIC_TYPE_INT:
2587 case ATOMIC_TYPE_UINT:
2588 case ATOMIC_TYPE_LONG:
2589 case ATOMIC_TYPE_ULONG:
2590 case ATOMIC_TYPE_LONGLONG:
2591 case ATOMIC_TYPE_ULONGLONG:
2592 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2593 tc = integer_type_class;
2596 case ATOMIC_TYPE_FLOAT:
2597 case ATOMIC_TYPE_DOUBLE:
2598 case ATOMIC_TYPE_LONG_DOUBLE:
2599 tc = real_type_class;
2602 case ATOMIC_TYPE_FLOAT_COMPLEX:
2603 case ATOMIC_TYPE_DOUBLE_COMPLEX:
2604 case ATOMIC_TYPE_LONG_DOUBLE_COMPLEX:
2605 tc = complex_type_class;
2607 case ATOMIC_TYPE_FLOAT_IMAGINARY:
2608 case ATOMIC_TYPE_DOUBLE_IMAGINARY:
2609 case ATOMIC_TYPE_LONG_DOUBLE_IMAGINARY:
2610 tc = complex_type_class;
2613 panic("Unexpected atomic type in classify_type_to_firm().");
2616 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
2617 case TYPE_ARRAY: /* gcc handles this as pointer */
2618 case TYPE_FUNCTION: /* gcc handles this as pointer */
2619 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
2620 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
2621 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
2623 /* gcc handles this as integer */
2624 case TYPE_ENUM: tc = integer_type_class; goto make_const;
2627 /* typedef/typeof should be skipped already */
2634 panic("unexpected TYPE classify_type_to_firm().");
2637 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2638 ir_mode *const mode = mode_int;
2639 tarval *const tv = new_tarval_from_long(tc, mode);
2640 return new_d_Const(dbgi, mode, tv);
2643 static ir_node *function_name_to_firm(
2644 const funcname_expression_t *const expr)
2646 switch(expr->kind) {
2647 case FUNCNAME_FUNCTION:
2648 case FUNCNAME_PRETTY_FUNCTION:
2649 case FUNCNAME_FUNCDNAME:
2650 if (current_function_name == NULL) {
2651 const source_position_t *const src_pos = &expr->base.source_position;
2652 const char *const name = current_function_decl->symbol->string;
2653 const string_t string = { name, strlen(name) + 1 };
2654 current_function_name = string_to_firm(src_pos, "__func__", &string);
2656 return current_function_name;
2657 case FUNCNAME_FUNCSIG:
2658 if (current_funcsig == NULL) {
2659 const source_position_t *const src_pos = &expr->base.source_position;
2660 ir_entity *ent = get_irg_entity(current_ir_graph);
2661 const char *const name = get_entity_ld_name(ent);
2662 const string_t string = { name, strlen(name) + 1 };
2663 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__", &string);
2665 return current_funcsig;
2667 panic("Unsupported function name");
2670 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2672 statement_t *statement = expr->statement;
2674 assert(statement->kind == STATEMENT_COMPOUND);
2675 return compound_statement_to_firm(&statement->compound);
2678 static ir_node *va_start_expression_to_firm(
2679 const va_start_expression_t *const expr)
2681 ir_type *const method_type = get_ir_type(current_function_decl->type);
2682 int const n = get_method_n_params(method_type) - 1;
2683 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
2684 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
2685 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2686 ir_node *const no_mem = new_NoMem();
2687 ir_node *const arg_sel =
2688 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2690 ir_node *const cnst = get_type_size(expr->parameter->type);
2691 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2692 set_value_for_expression(expr->ap, add);
2697 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2699 type_t *const type = expr->base.type;
2700 ir_node *const ap = expression_to_firm(expr->ap);
2701 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2702 ir_node *const res = deref_address(type, ap, dbgi);
2704 ir_node *const cnst = get_type_size(expr->base.type);
2705 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
2706 set_value_for_expression(expr->ap, add);
2711 static ir_node *dereference_addr(const unary_expression_t *const expression)
2713 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
2714 return expression_to_firm(expression->value);
2717 static ir_node *expression_to_addr(const expression_t *expression)
2719 switch(expression->kind) {
2720 case EXPR_REFERENCE:
2721 return reference_addr(&expression->reference);
2722 case EXPR_ARRAY_ACCESS:
2723 return array_access_addr(&expression->array_access);
2725 return select_addr(&expression->select);
2727 return call_expression_to_firm(&expression->call);
2728 case EXPR_UNARY_DEREFERENCE: {
2729 return dereference_addr(&expression->unary);
2734 panic("trying to get address of non-lvalue");
2737 static ir_node *builtin_constant_to_firm(
2738 const builtin_constant_expression_t *expression)
2740 ir_mode *mode = get_ir_mode(expression->base.type);
2743 if (is_constant_expression(expression->value)) {
2748 return new_Const_long(mode, v);
2751 static ir_node *builtin_prefetch_to_firm(
2752 const builtin_prefetch_expression_t *expression)
2754 ir_node *adr = expression_to_firm(expression->adr);
2755 /* no Firm support for prefetch yet */
2760 static ir_node *_expression_to_firm(const expression_t *expression)
2762 switch(expression->kind) {
2763 case EXPR_CHARACTER_CONSTANT:
2764 return character_constant_to_firm(&expression->conste);
2765 case EXPR_WIDE_CHARACTER_CONSTANT:
2766 return wide_character_constant_to_firm(&expression->conste);
2768 return const_to_firm(&expression->conste);
2769 case EXPR_STRING_LITERAL:
2770 return string_literal_to_firm(&expression->string);
2771 case EXPR_WIDE_STRING_LITERAL:
2772 return wide_string_literal_to_firm(&expression->wide_string);
2773 case EXPR_REFERENCE:
2774 return reference_expression_to_firm(&expression->reference);
2776 return call_expression_to_firm(&expression->call);
2778 return unary_expression_to_firm(&expression->unary);
2780 return binary_expression_to_firm(&expression->binary);
2781 case EXPR_ARRAY_ACCESS:
2782 return array_access_to_firm(&expression->array_access);
2784 return sizeof_to_firm(&expression->typeprop);
2786 return alignof_to_firm(&expression->typeprop);
2787 case EXPR_CONDITIONAL:
2788 return conditional_to_firm(&expression->conditional);
2790 return select_to_firm(&expression->select);
2791 case EXPR_CLASSIFY_TYPE:
2792 return classify_type_to_firm(&expression->classify_type);
2794 return function_name_to_firm(&expression->funcname);
2795 case EXPR_STATEMENT:
2796 return statement_expression_to_firm(&expression->statement);
2798 return va_start_expression_to_firm(&expression->va_starte);
2800 return va_arg_expression_to_firm(&expression->va_arge);
2801 case EXPR_BUILTIN_SYMBOL:
2802 panic("unimplemented expression found");
2803 case EXPR_BUILTIN_CONSTANT_P:
2804 return builtin_constant_to_firm(&expression->builtin_constant);
2805 case EXPR_BUILTIN_PREFETCH:
2806 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
2808 return offsetof_to_firm(&expression->offsetofe);
2809 case EXPR_COMPOUND_LITERAL:
2810 return compound_literal_to_firm(&expression->compound_literal);
2816 panic("invalid expression found");
2819 static ir_node *expression_to_firm(const expression_t *expression)
2821 ir_node *res = _expression_to_firm(expression);
2823 if(res != NULL && get_irn_mode(res) == mode_b) {
2824 ir_mode *mode = get_ir_mode(expression->base.type);
2826 if(is_Const_null(res)) {
2827 return new_Const_long(mode, 0);
2829 assert(is_Const_one(res));
2830 return new_Const_long(mode, 1);
2834 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2835 return produce_condition_result(expression, dbgi);
2841 static ir_node *expression_to_modeb(const expression_t *expression)
2843 ir_node *res = _expression_to_firm(expression);
2844 res = create_conv(NULL, res, mode_b);
2850 * create a short-circuit expression evaluation that tries to construct
2851 * efficient control flow structures for &&, || and ! expressions
2853 static void create_condition_evaluation(const expression_t *expression,
2854 ir_node *true_block,
2855 ir_node *false_block)
2857 switch(expression->kind) {
2858 case EXPR_UNARY_NOT: {
2859 const unary_expression_t *unary_expression = &expression->unary;
2860 create_condition_evaluation(unary_expression->value, false_block,
2864 case EXPR_BINARY_LOGICAL_AND: {
2865 const binary_expression_t *binary_expression = &expression->binary;
2867 ir_node *cur_block = get_cur_block();
2868 ir_node *extra_block = new_immBlock();
2869 set_cur_block(cur_block);
2870 create_condition_evaluation(binary_expression->left, extra_block,
2872 mature_immBlock(extra_block);
2873 set_cur_block(extra_block);
2874 create_condition_evaluation(binary_expression->right, true_block,
2878 case EXPR_BINARY_LOGICAL_OR: {
2879 const binary_expression_t *binary_expression = &expression->binary;
2881 ir_node *cur_block = get_cur_block();
2882 ir_node *extra_block = new_immBlock();
2883 set_cur_block(cur_block);
2884 create_condition_evaluation(binary_expression->left, true_block,
2886 mature_immBlock(extra_block);
2887 set_cur_block(extra_block);
2888 create_condition_evaluation(binary_expression->right, true_block,
2896 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2897 ir_node *condition = expression_to_modeb(expression);
2898 ir_node *cond = new_d_Cond(dbgi, condition);
2899 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
2900 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
2902 /* set branch prediction info based on __builtin_expect */
2903 if(expression->kind == EXPR_BINARY_BUILTIN_EXPECT) {
2904 long cnst = fold_constant(expression->binary.right);
2905 cond_jmp_predicate pred;
2908 pred = COND_JMP_PRED_FALSE;
2910 pred = COND_JMP_PRED_TRUE;
2912 set_Cond_jmp_pred(cond, pred);
2915 add_immBlock_pred(true_block, true_proj);
2916 add_immBlock_pred(false_block, false_proj);
2918 set_cur_block(NULL);
2923 static void create_declaration_entity(declaration_t *declaration,
2924 declaration_kind_t declaration_kind,
2925 ir_type *parent_type)
2927 ident *const id = new_id_from_str(declaration->symbol->string);
2928 type_t *const type = skip_typeref(declaration->type);
2929 ir_type *const irtype = get_ir_type(type);
2930 dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
2931 ir_entity *const entity = new_d_entity(parent_type, id, irtype, dbgi);
2932 set_entity_ld_ident(entity, id);
2934 declaration->declaration_kind = (unsigned char) declaration_kind;
2935 declaration->v.entity = entity;
2936 set_entity_variability(entity, variability_uninitialized);
2937 if(parent_type == get_tls_type())
2938 set_entity_allocation(entity, allocation_automatic);
2939 else if(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
2940 set_entity_allocation(entity, allocation_static);
2942 if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
2943 set_entity_volatility(entity, volatility_is_volatile);
2948 typedef struct type_path_entry_t type_path_entry_t;
2949 struct type_path_entry_t {
2951 ir_initializer_t *initializer;
2953 declaration_t *compound_entry;
2956 typedef struct type_path_t type_path_t;
2957 struct type_path_t {
2958 type_path_entry_t *path;
2963 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
2965 size_t len = ARR_LEN(path->path);
2967 for(size_t i = 0; i < len; ++i) {
2968 const type_path_entry_t *entry = & path->path[i];
2970 type_t *type = skip_typeref(entry->type);
2971 if(is_type_compound(type)) {
2972 fprintf(stderr, ".%s", entry->compound_entry->symbol->string);
2973 } else if(is_type_array(type)) {
2974 fprintf(stderr, "[%zd]", entry->index);
2976 fprintf(stderr, "-INVALID-");
2979 fprintf(stderr, " (");
2980 print_type(path->top_type);
2981 fprintf(stderr, ")");
2984 static type_path_entry_t *get_type_path_top(const type_path_t *path)
2986 size_t len = ARR_LEN(path->path);
2988 return & path->path[len-1];
2991 static type_path_entry_t *append_to_type_path(type_path_t *path)
2993 size_t len = ARR_LEN(path->path);
2994 ARR_RESIZE(type_path_entry_t, path->path, len+1);
2996 type_path_entry_t *result = & path->path[len];
2997 memset(result, 0, sizeof(result[0]));
3001 static size_t get_compound_size(const compound_type_t *type)
3003 declaration_t *declaration = type->declaration;
3004 declaration_t *member = declaration->scope.declarations;
3006 for( ; member != NULL; member = member->next) {
3009 /* TODO: cache results? */
3014 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3016 type_t *orig_top_type = path->top_type;
3017 type_t *top_type = skip_typeref(orig_top_type);
3019 assert(is_type_compound(top_type) || is_type_array(top_type));
3021 if(ARR_LEN(path->path) == 0) {
3024 type_path_entry_t *top = get_type_path_top(path);
3025 ir_initializer_t *initializer = top->initializer;
3026 return get_initializer_compound_value(initializer, top->index);
3030 static void descend_into_subtype(type_path_t *path)
3032 type_t *orig_top_type = path->top_type;
3033 type_t *top_type = skip_typeref(orig_top_type);
3035 assert(is_type_compound(top_type) || is_type_array(top_type));
3037 ir_initializer_t *initializer = get_initializer_entry(path);
3039 type_path_entry_t *top = append_to_type_path(path);
3040 top->type = top_type;
3044 if(is_type_compound(top_type)) {
3045 declaration_t *declaration = top_type->compound.declaration;
3046 declaration_t *entry = declaration->scope.declarations;
3048 top->compound_entry = entry;
3050 len = get_compound_size(&top_type->compound);
3052 path->top_type = entry->type;
3054 assert(is_type_array(top_type));
3055 assert(top_type->array.size > 0);
3058 path->top_type = top_type->array.element_type;
3059 len = top_type->array.size;
3061 if(initializer == NULL
3062 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3063 initializer = create_initializer_compound(len);
3064 /* we have to set the entry at the 2nd latest path entry... */
3065 size_t path_len = ARR_LEN(path->path);
3066 assert(path_len >= 1);
3068 type_path_entry_t *entry = & path->path[path_len-2];
3069 ir_initializer_t *tinitializer = entry->initializer;
3070 set_initializer_compound_value(tinitializer, entry->index,
3074 top->initializer = initializer;
3077 static void ascend_from_subtype(type_path_t *path)
3079 type_path_entry_t *top = get_type_path_top(path);
3081 path->top_type = top->type;
3083 size_t len = ARR_LEN(path->path);
3084 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3087 static void walk_designator(type_path_t *path, const designator_t *designator)
3089 /* designators start at current object type */
3090 ARR_RESIZE(type_path_entry_t, path->path, 1);
3092 for( ; designator != NULL; designator = designator->next) {
3093 type_path_entry_t *top = get_type_path_top(path);
3094 type_t *orig_type = top->type;
3095 type_t *type = skip_typeref(orig_type);
3097 if(designator->symbol != NULL) {
3098 assert(is_type_compound(type));
3100 symbol_t *symbol = designator->symbol;
3102 declaration_t *declaration = type->compound.declaration;
3103 declaration_t *iter = declaration->scope.declarations;
3104 for( ; iter != NULL; iter = iter->next, ++index) {
3105 if(iter->symbol == symbol) {
3109 assert(iter != NULL);
3111 top->type = orig_type;
3112 top->compound_entry = iter;
3114 orig_type = iter->type;
3116 expression_t *array_index = designator->array_index;
3117 assert(designator->array_index != NULL);
3118 assert(is_type_array(type));
3119 assert(is_type_valid(array_index->base.type));
3121 long index = fold_constant(array_index);
3124 if(type->array.size_constant == 1) {
3125 long array_size = type->array.size;
3126 assert(index < array_size);
3130 top->type = orig_type;
3131 top->index = (size_t) index;
3132 orig_type = type->array.element_type;
3134 path->top_type = orig_type;
3136 if(designator->next != NULL) {
3137 descend_into_subtype(path);
3141 path->invalid = false;
3144 static void advance_current_object(type_path_t *path)
3147 /* TODO: handle this... */
3148 panic("invalid initializer in ast2firm (excessive elements)");
3152 type_path_entry_t *top = get_type_path_top(path);
3154 type_t *type = skip_typeref(top->type);
3155 if(is_type_union(type)) {
3156 top->compound_entry = NULL;
3157 } else if(is_type_struct(type)) {
3158 declaration_t *entry = top->compound_entry;
3161 entry = entry->next;
3162 top->compound_entry = entry;
3164 path->top_type = entry->type;
3168 assert(is_type_array(type));
3171 if(!type->array.size_constant || top->index < type->array.size) {
3176 /* we're past the last member of the current sub-aggregate, try if we
3177 * can ascend in the type hierarchy and continue with another subobject */
3178 size_t len = ARR_LEN(path->path);
3181 ascend_from_subtype(path);
3182 advance_current_object(path);
3184 path->invalid = true;
3189 static ir_initializer_t *create_ir_initializer(
3190 const initializer_t *initializer, type_t *type);
3192 static ir_initializer_t *create_ir_initializer_value(
3193 const initializer_value_t *initializer)
3195 ir_node *value = expression_to_firm(initializer->value);
3196 return create_initializer_const(value);
3199 static ir_initializer_t *create_ir_initializer_list(
3200 const initializer_list_t *initializer, type_t *type)
3203 memset(&path, 0, sizeof(path));
3204 path.top_type = type;
3205 path.path = NEW_ARR_F(type_path_entry_t, 0);
3207 descend_into_subtype(&path);
3209 for(size_t i = 0; i < initializer->len; ++i) {
3210 const initializer_t *sub_initializer = initializer->initializers[i];
3212 if(sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3213 walk_designator(&path, sub_initializer->designator.designator);
3217 if(sub_initializer->kind == INITIALIZER_VALUE) {
3218 /* we might have to descend into types until we're at a scalar
3221 type_t *orig_top_type = path.top_type;
3222 type_t *top_type = skip_typeref(orig_top_type);
3224 if(is_type_scalar(top_type))
3226 descend_into_subtype(&path);
3230 ir_initializer_t *sub_irinitializer
3231 = create_ir_initializer(sub_initializer, path.top_type);
3233 size_t path_len = ARR_LEN(path.path);
3234 assert(path_len >= 1);
3235 type_path_entry_t *entry = & path.path[path_len-1];
3236 ir_initializer_t *tinitializer = entry->initializer;
3237 set_initializer_compound_value(tinitializer, entry->index,
3240 advance_current_object(&path);
3243 assert(ARR_LEN(path.path) >= 1);
3244 ir_initializer_t *result = path.path[0].initializer;
3245 DEL_ARR_F(path.path);
3250 static ir_initializer_t *create_ir_initializer_string(
3251 const initializer_string_t *initializer, type_t *type)
3253 type = skip_typeref(type);
3255 size_t string_len = initializer->string.size;
3256 assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3257 size_t len = type->array.size;
3258 ir_initializer_t *irinitializer = create_initializer_compound(len);
3260 const char *string = initializer->string.begin;
3261 ir_mode *mode = get_type_mode(ir_type_const_char);
3263 for(size_t i = 0; i < len; ++i) {
3268 tarval *tv = new_tarval_from_long(string[i], mode);
3269 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3271 set_initializer_compound_value(irinitializer, i, char_initializer);
3274 return irinitializer;
3277 static ir_initializer_t *create_ir_initializer_wide_string(
3278 const initializer_wide_string_t *initializer, type_t *type)
3280 size_t string_len = initializer->string.size;
3281 assert(type->kind == TYPE_ARRAY && type->array.size_constant);
3282 size_t len = type->array.size;
3283 ir_initializer_t *irinitializer = create_initializer_compound(len);
3285 const wchar_rep_t *string = initializer->string.begin;
3286 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3288 for(size_t i = 0; i < len; ++i) {
3290 if(i < string_len) {
3293 tarval *tv = new_tarval_from_long(string[i], mode);
3294 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3296 set_initializer_compound_value(irinitializer, i, char_initializer);
3299 return irinitializer;
3302 static ir_initializer_t *create_ir_initializer(
3303 const initializer_t *initializer, type_t *type)
3305 switch(initializer->kind) {
3306 case INITIALIZER_STRING:
3307 return create_ir_initializer_string(&initializer->string, type);
3309 case INITIALIZER_WIDE_STRING:
3310 return create_ir_initializer_wide_string(&initializer->wide_string,
3313 case INITIALIZER_LIST:
3314 return create_ir_initializer_list(&initializer->list, type);
3316 case INITIALIZER_VALUE:
3317 return create_ir_initializer_value(&initializer->value);
3319 case INITIALIZER_DESIGNATOR:
3320 panic("unexpected designator initializer found");
3322 panic("unknown initializer");
3325 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3326 ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3328 switch(get_initializer_kind(initializer)) {
3329 case IR_INITIALIZER_NULL: {
3330 /* TODO: implement this for compound types... */
3331 assert(type != NULL);
3333 ir_mode *mode = get_type_mode(type);
3334 tarval *zero = get_mode_null(mode);
3335 ir_node *cnst = new_d_Const(dbgi, mode, zero);
3337 /* TODO: bitfields */
3338 ir_node *mem = get_store();
3339 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3340 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3344 case IR_INITIALIZER_CONST: {
3345 ir_node *node = get_initializer_const_value(initializer);
3346 ir_mode *mode = get_irn_mode(node);
3347 assert(get_type_mode(type) == mode);
3349 /* TODO: bitfields... */
3350 ir_node *mem = get_store();
3351 ir_node *store = new_d_Store(dbgi, mem, base_addr, node);
3352 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3356 case IR_INITIALIZER_TARVAL: {
3357 tarval *tv = get_initializer_tarval_value(initializer);
3358 ir_mode *mode = get_tarval_mode(tv);
3359 ir_node *cnst = new_d_Const(dbgi, mode, tv);
3360 assert(get_type_mode(type) == mode);
3362 /* TODO: bitfields... */
3363 ir_node *mem = get_store();
3364 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3365 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3369 case IR_INITIALIZER_COMPOUND: {
3370 assert(is_compound_type(type));
3372 if(is_Array_type(type)) {
3373 assert(has_array_upper_bound(type, 0));
3374 n_members = get_array_upper_bound_int(type, 0);
3376 n_members = get_compound_n_members(type);
3379 if(get_initializer_compound_n_entries(initializer)
3380 != (unsigned) n_members)
3381 panic("initializer doesn't match compound type");
3383 for(int i = 0; i < n_members; ++i) {
3386 if(is_Array_type(type)) {
3387 ir_entity *entity = get_array_element_entity(type);
3388 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3389 ir_node *cnst = new_d_Const(dbgi, mode_uint, index_tv);
3390 ir_node *in[1] = { cnst };
3391 irtype = get_array_element_type(type);
3392 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3394 ir_entity *member = get_compound_member(type, i);
3396 irtype = get_entity_type(member);
3397 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3400 ir_initializer_t *sub_init
3401 = get_initializer_compound_value(initializer, i);
3403 create_dynamic_initializer_sub(sub_init, irtype, dbgi, addr);
3409 panic("invalid IR_INITIALIZER found");
3412 static void create_dynamic_initializer(ir_initializer_t *initializer,
3413 dbg_info *dbgi, ir_entity *entity)
3415 ir_node *frame = get_local_frame(entity);
3416 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3417 ir_type *type = get_entity_type(entity);
3419 create_dynamic_initializer_sub(initializer, type, dbgi, base_addr);
3422 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3423 ir_entity *entity, type_t *type)
3425 ir_node *memory = get_store();
3426 ir_node *nomem = new_NoMem();
3427 ir_node *frame = get_irg_frame(current_ir_graph);
3428 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
3430 if(initializer->kind == INITIALIZER_VALUE) {
3431 initializer_value_t *initializer_value = &initializer->value;
3433 ir_node *value = expression_to_firm(initializer_value->value);
3434 type = skip_typeref(type);
3435 assign_value(dbgi, addr, type, value);
3439 if(!is_constant_initializer(initializer)) {
3440 ir_initializer_t *irinitializer
3441 = create_ir_initializer(initializer, type);
3443 create_dynamic_initializer(irinitializer, dbgi, entity);
3447 /* create the ir_initializer */
3448 ir_graph *const old_current_ir_graph = current_ir_graph;
3449 current_ir_graph = get_const_code_irg();
3451 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3453 assert(current_ir_graph == get_const_code_irg());
3454 current_ir_graph = old_current_ir_graph;
3456 /* create a "template" entity which is copied to the entity on the stack */
3457 ident *const id = unique_ident("initializer");
3458 ir_type *const irtype = get_ir_type(type);
3459 ir_type *const global_type = get_glob_type();
3460 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3461 set_entity_ld_ident(init_entity, id);
3463 set_entity_variability(init_entity, variability_initialized);
3464 set_entity_visibility(init_entity, visibility_local);
3465 set_entity_allocation(init_entity, allocation_static);
3467 set_entity_initializer(init_entity, irinitializer);
3469 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3470 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3472 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3473 set_store(copyb_mem);
3476 static void create_initializer_local_variable_entity(declaration_t *declaration)
3478 initializer_t *initializer = declaration->init.initializer;
3479 dbg_info *dbgi = get_dbg_info(&declaration->source_position);
3480 ir_entity *entity = declaration->v.entity;
3481 type_t *type = declaration->type;
3482 create_local_initializer(initializer, dbgi, entity, type);
3485 static void create_declaration_initializer(declaration_t *declaration)
3487 initializer_t *initializer = declaration->init.initializer;
3488 if(initializer == NULL)
3491 declaration_kind_t declaration_kind
3492 = (declaration_kind_t) declaration->declaration_kind;
3493 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3494 create_initializer_local_variable_entity(declaration);
3498 if(initializer->kind == INITIALIZER_VALUE) {
3499 initializer_value_t *initializer_value = &initializer->value;
3501 ir_node *value = expression_to_firm(initializer_value->value);
3503 if(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
3504 set_value(declaration->v.value_number, value);
3506 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3508 ir_entity *entity = declaration->v.entity;
3510 set_entity_variability(entity, variability_initialized);
3511 set_atomic_ent_value(entity, value);
3514 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY
3515 || declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
3517 ir_entity *entity = declaration->v.entity;
3518 ir_initializer_t *irinitializer
3519 = create_ir_initializer(initializer, declaration->type);
3521 set_entity_variability(entity, variability_initialized);
3522 set_entity_initializer(entity, irinitializer);
3526 static void create_variable_length_array(declaration_t *declaration)
3528 dbg_info *dbgi = get_dbg_info(&declaration->source_position);
3529 type_t *type = declaration->type;
3530 ir_node *mem = get_store();
3531 ir_type *el_type = get_ir_type(type->array.element_type);
3533 /* make sure size_node is calculated */
3534 get_type_size(type);
3535 ir_node *elems = type->array.size_node;
3536 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
3538 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
3539 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
3542 /* initializers are not allowed for VLAs */
3543 assert(declaration->init.initializer == NULL);
3545 declaration->declaration_kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
3546 declaration->v.vla_base = addr;
3548 /* TODO: record VLA somewhere so we create the free node when we leave
3553 * Creates a Firm local variable from a declaration.
3555 static void create_local_variable(declaration_t *declaration)
3557 assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3559 bool needs_entity = declaration->address_taken;
3560 type_t *type = skip_typeref(declaration->type);
3562 /* is it a variable length array? */
3563 if(is_type_array(type) && !type->array.size_constant) {
3564 create_variable_length_array(declaration);
3566 } else if(is_type_array(type) || is_type_compound(type)) {
3567 needs_entity = true;
3568 } else if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3569 needs_entity = true;
3573 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
3574 create_declaration_entity(declaration,
3575 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
3578 declaration->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
3579 declaration->v.value_number = next_value_number_function;
3580 set_irg_loc_description(current_ir_graph, next_value_number_function, declaration);
3581 ++next_value_number_function;
3584 create_declaration_initializer(declaration);
3587 static void create_local_static_variable(declaration_t *declaration)
3589 assert(declaration->declaration_kind == DECLARATION_KIND_UNKNOWN);
3591 type_t *const type = skip_typeref(declaration->type);
3592 ir_type *const global_type = get_glob_type();
3593 ident *const id = unique_ident(declaration->symbol->string);
3594 ir_type *const irtype = get_ir_type(type);
3595 dbg_info *const dbgi = get_dbg_info(&declaration->source_position);
3596 ir_entity *const entity = new_d_entity(global_type, id, irtype, dbgi);
3597 set_entity_ld_ident(entity, id);
3599 if(type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3600 set_entity_volatility(entity, volatility_is_volatile);
3603 declaration->declaration_kind = DECLARATION_KIND_GLOBAL_VARIABLE;
3604 declaration->v.entity = entity;
3605 set_entity_variability(entity, variability_uninitialized);
3606 set_entity_visibility(entity, visibility_local);
3607 set_entity_allocation(entity, allocation_static);
3609 ir_graph *const old_current_ir_graph = current_ir_graph;
3610 current_ir_graph = get_const_code_irg();
3612 create_declaration_initializer(declaration);
3614 assert(current_ir_graph == get_const_code_irg());
3615 current_ir_graph = old_current_ir_graph;
3620 static void return_statement_to_firm(return_statement_t *statement)
3622 if(get_cur_block() == NULL)
3625 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
3626 ir_type *func_irtype = get_ir_type(current_function_decl->type);
3631 if(get_method_n_ress(func_irtype) > 0) {
3632 ir_type *res_type = get_method_res_type(func_irtype, 0);
3634 if(statement->value != NULL) {
3635 ir_node *node = expression_to_firm(statement->value);
3636 node = do_strict_conv(dbgi, node);
3640 if(is_compound_type(res_type)) {
3643 mode = get_type_mode(res_type);
3645 in[0] = new_Unknown(mode);
3649 /* build return_value for its side effects */
3650 if(statement->value != NULL) {
3651 expression_to_firm(statement->value);
3656 ir_node *store = get_store();
3657 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
3659 ir_node *end_block = get_irg_end_block(current_ir_graph);
3660 add_immBlock_pred(end_block, ret);
3662 set_cur_block(NULL);
3665 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
3667 if(get_cur_block() == NULL)
3670 return expression_to_firm(statement->expression);
3673 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
3675 ir_node *result = NULL;
3676 statement_t *statement = compound->statements;
3677 for( ; statement != NULL; statement = statement->base.next) {
3678 //context2firm(&statement->scope);
3680 if(statement->base.next == NULL
3681 && statement->kind == STATEMENT_EXPRESSION) {
3682 result = expression_statement_to_firm(
3683 &statement->expression);
3686 statement_to_firm(statement);
3692 static void create_global_variable(declaration_t *declaration)
3696 switch ((storage_class_tag_t)declaration->storage_class) {
3697 case STORAGE_CLASS_STATIC:
3698 vis = visibility_local;
3701 case STORAGE_CLASS_EXTERN:
3702 vis = visibility_external_allocated;
3705 case STORAGE_CLASS_NONE:
3706 vis = visibility_external_visible;
3709 case STORAGE_CLASS_THREAD:
3710 vis = visibility_external_visible;
3713 case STORAGE_CLASS_THREAD_EXTERN:
3714 vis = visibility_external_allocated;
3717 case STORAGE_CLASS_THREAD_STATIC:
3718 vis = visibility_local;
3722 var_type = get_tls_type();
3726 var_type = get_glob_type();
3730 create_declaration_entity(declaration,
3731 DECLARATION_KIND_GLOBAL_VARIABLE,
3733 set_entity_visibility(declaration->v.entity, vis);
3737 case STORAGE_CLASS_TYPEDEF:
3738 case STORAGE_CLASS_AUTO:
3739 case STORAGE_CLASS_REGISTER:
3740 case STORAGE_CLASS_ENUM_ENTRY:
3743 panic("Invalid storage class for global variable");
3746 static void create_local_declaration(declaration_t *declaration)
3748 if(declaration->symbol == NULL)
3751 type_t *type = skip_typeref(declaration->type);
3753 switch ((storage_class_tag_t) declaration->storage_class) {
3754 case STORAGE_CLASS_STATIC:
3755 create_local_static_variable(declaration);
3757 case STORAGE_CLASS_EXTERN:
3758 create_global_variable(declaration);
3759 create_declaration_initializer(declaration);
3761 case STORAGE_CLASS_NONE:
3762 case STORAGE_CLASS_AUTO:
3763 case STORAGE_CLASS_REGISTER:
3764 if(is_type_function(type)) {
3765 if(declaration->init.statement != NULL) {
3766 panic("nested functions not supported yet");
3768 get_function_entity(declaration);
3771 create_local_variable(declaration);
3774 case STORAGE_CLASS_ENUM_ENTRY:
3775 case STORAGE_CLASS_TYPEDEF:
3776 case STORAGE_CLASS_THREAD:
3777 case STORAGE_CLASS_THREAD_EXTERN:
3778 case STORAGE_CLASS_THREAD_STATIC:
3781 panic("invalid storage class found");
3784 static void declaration_statement_to_firm(declaration_statement_t *statement)
3786 declaration_t *declaration = statement->declarations_begin;
3787 declaration_t *end = statement->declarations_end->next;
3788 for( ; declaration != end; declaration = declaration->next) {
3789 if(declaration->namespc != NAMESPACE_NORMAL)
3791 create_local_declaration(declaration);
3795 static void if_statement_to_firm(if_statement_t *statement)
3797 ir_node *cur_block = get_cur_block();
3799 ir_node *fallthrough_block = new_immBlock();
3801 /* the true (blocks) */
3802 ir_node *true_block;
3803 if (statement->true_statement != NULL) {
3804 true_block = new_immBlock();
3805 statement_to_firm(statement->true_statement);
3806 if(get_cur_block() != NULL) {
3807 ir_node *jmp = new_Jmp();
3808 add_immBlock_pred(fallthrough_block, jmp);
3811 true_block = fallthrough_block;
3814 /* the false (blocks) */
3815 ir_node *false_block;
3816 if(statement->false_statement != NULL) {
3817 false_block = new_immBlock();
3819 statement_to_firm(statement->false_statement);
3820 if(get_cur_block() != NULL) {
3821 ir_node *jmp = new_Jmp();
3822 add_immBlock_pred(fallthrough_block, jmp);
3825 false_block = fallthrough_block;
3828 /* create the condition */
3829 if(cur_block != NULL) {
3830 set_cur_block(cur_block);
3831 create_condition_evaluation(statement->condition, true_block,
3835 mature_immBlock(true_block);
3836 if(false_block != fallthrough_block) {
3837 mature_immBlock(false_block);
3839 mature_immBlock(fallthrough_block);
3841 set_cur_block(fallthrough_block);
3844 static void while_statement_to_firm(while_statement_t *statement)
3846 ir_node *jmp = NULL;
3847 if(get_cur_block() != NULL) {
3851 /* create the header block */
3852 ir_node *header_block = new_immBlock();
3854 add_immBlock_pred(header_block, jmp);
3857 /* the false block */
3858 ir_node *false_block = new_immBlock();
3861 ir_node *body_block;
3862 if (statement->body != NULL) {
3863 ir_node *old_continue_label = continue_label;
3864 ir_node *old_break_label = break_label;
3865 continue_label = header_block;
3866 break_label = false_block;
3868 body_block = new_immBlock();
3869 statement_to_firm(statement->body);
3871 assert(continue_label == header_block);
3872 assert(break_label == false_block);
3873 continue_label = old_continue_label;
3874 break_label = old_break_label;
3876 if(get_cur_block() != NULL) {
3878 add_immBlock_pred(header_block, jmp);
3881 body_block = header_block;
3884 /* create the condition */
3885 set_cur_block(header_block);
3887 create_condition_evaluation(statement->condition, body_block, false_block);
3888 mature_immBlock(body_block);
3889 mature_immBlock(false_block);
3890 mature_immBlock(header_block);
3892 set_cur_block(false_block);
3895 static void do_while_statement_to_firm(do_while_statement_t *statement)
3897 ir_node *jmp = NULL;
3898 if(get_cur_block() != NULL) {
3902 /* create the header block */
3903 ir_node *header_block = new_immBlock();
3905 /* the false block */
3906 ir_node *false_block = new_immBlock();
3909 ir_node *body_block = new_immBlock();
3911 add_immBlock_pred(body_block, jmp);
3914 if (statement->body != NULL) {
3915 ir_node *old_continue_label = continue_label;
3916 ir_node *old_break_label = break_label;
3917 continue_label = header_block;
3918 break_label = false_block;
3920 statement_to_firm(statement->body);
3922 assert(continue_label == header_block);
3923 assert(break_label == false_block);
3924 continue_label = old_continue_label;
3925 break_label = old_break_label;
3927 if (get_cur_block() == NULL) {
3928 mature_immBlock(header_block);
3929 mature_immBlock(body_block);
3930 mature_immBlock(false_block);
3935 ir_node *body_jmp = new_Jmp();
3936 add_immBlock_pred(header_block, body_jmp);
3937 mature_immBlock(header_block);
3939 /* create the condition */
3940 set_cur_block(header_block);
3942 create_condition_evaluation(statement->condition, body_block, false_block);
3943 mature_immBlock(body_block);
3944 mature_immBlock(false_block);
3945 mature_immBlock(header_block);
3947 set_cur_block(false_block);
3950 static void for_statement_to_firm(for_statement_t *statement)
3952 ir_node *jmp = NULL;
3953 if (get_cur_block() != NULL) {
3954 if(statement->initialisation != NULL) {
3955 expression_to_firm(statement->initialisation);
3958 /* create declarations */
3959 declaration_t *declaration = statement->scope.declarations;
3960 for( ; declaration != NULL; declaration = declaration->next) {
3961 create_local_declaration(declaration);
3968 /* create the step block */
3969 ir_node *const step_block = new_immBlock();
3970 if (statement->step != NULL) {
3971 expression_to_firm(statement->step);
3973 ir_node *const step_jmp = new_Jmp();
3975 /* create the header block */
3976 ir_node *const header_block = new_immBlock();
3978 add_immBlock_pred(header_block, jmp);
3980 add_immBlock_pred(header_block, step_jmp);
3982 /* the false block */
3983 ir_node *const false_block = new_immBlock();
3986 ir_node * body_block;
3987 if (statement->body != NULL) {
3988 ir_node *const old_continue_label = continue_label;
3989 ir_node *const old_break_label = break_label;
3990 continue_label = step_block;
3991 break_label = false_block;
3993 body_block = new_immBlock();
3994 statement_to_firm(statement->body);
3996 assert(continue_label == step_block);
3997 assert(break_label == false_block);
3998 continue_label = old_continue_label;
3999 break_label = old_break_label;
4001 if (get_cur_block() != NULL) {
4003 add_immBlock_pred(step_block, jmp);
4006 body_block = step_block;
4009 /* create the condition */
4010 set_cur_block(header_block);
4011 if (statement->condition != NULL) {
4012 create_condition_evaluation(statement->condition, body_block,
4015 keep_alive(header_block);
4017 add_immBlock_pred(body_block, jmp);
4020 mature_immBlock(body_block);
4021 mature_immBlock(false_block);
4022 mature_immBlock(step_block);
4023 mature_immBlock(header_block);
4024 mature_immBlock(false_block);
4026 set_cur_block(false_block);
4029 static void create_jump_statement(const statement_t *statement,
4030 ir_node *target_block)
4032 if(get_cur_block() == NULL)
4035 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4036 ir_node *jump = new_d_Jmp(dbgi);
4037 add_immBlock_pred(target_block, jump);
4039 set_cur_block(NULL);
4042 static void switch_statement_to_firm(const switch_statement_t *statement)
4044 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4046 ir_node *expression = expression_to_firm(statement->expression);
4047 ir_node *cond = new_d_Cond(dbgi, expression);
4048 ir_node *break_block = new_immBlock();
4050 set_cur_block(NULL);
4052 ir_node *const old_switch_cond = current_switch_cond;
4053 ir_node *const old_break_label = break_label;
4054 const bool old_saw_default_label = saw_default_label;
4055 current_switch_cond = cond;
4056 break_label = break_block;
4058 if (statement->body != NULL) {
4059 statement_to_firm(statement->body);
4062 if(get_cur_block() != NULL) {
4063 ir_node *jmp = new_Jmp();
4064 add_immBlock_pred(break_block, jmp);
4067 if (!saw_default_label) {
4068 set_cur_block(get_nodes_block(cond));
4069 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4070 MAGIC_DEFAULT_PN_NUMBER);
4071 add_immBlock_pred(break_block, proj);
4074 assert(current_switch_cond == cond);
4075 assert(break_label == break_block);
4076 current_switch_cond = old_switch_cond;
4077 break_label = old_break_label;
4078 saw_default_label = old_saw_default_label;
4080 mature_immBlock(break_block);
4081 set_cur_block(break_block);
4084 static void case_label_to_firm(const case_label_statement_t *statement)
4086 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4088 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4090 /* let's create a node and hope firm constant folding creates a Const
4093 ir_node *old_block = get_nodes_block(current_switch_cond);
4094 ir_node *block = new_immBlock();
4096 set_cur_block(old_block);
4097 if(statement->expression != NULL) {
4098 long start_pn = fold_constant(statement->expression);
4099 long end_pn = start_pn;
4100 if (statement->end_range != NULL) {
4101 end_pn = fold_constant(statement->end_range);
4103 assert(start_pn <= end_pn);
4104 /* create jumps for all cases in the given range */
4105 for (long pn = start_pn; pn <= end_pn; ++pn) {
4106 if(pn == MAGIC_DEFAULT_PN_NUMBER) {
4107 /* oops someone detected our cheating... */
4108 panic("magic default pn used");
4110 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4111 add_immBlock_pred(block, proj);
4114 saw_default_label = true;
4115 proj = new_d_defaultProj(dbgi, current_switch_cond,
4116 MAGIC_DEFAULT_PN_NUMBER);
4118 add_immBlock_pred(block, proj);
4121 if (fallthrough != NULL) {
4122 add_immBlock_pred(block, fallthrough);
4124 mature_immBlock(block);
4125 set_cur_block(block);
4127 if(statement->statement != NULL) {
4128 statement_to_firm(statement->statement);
4132 static ir_node *get_label_block(declaration_t *label)
4134 assert(label->namespc == NAMESPACE_LABEL);
4136 if(label->declaration_kind == DECLARATION_KIND_LABEL_BLOCK) {
4137 return label->v.block;
4139 assert(label->declaration_kind == DECLARATION_KIND_UNKNOWN);
4141 ir_node *old_cur_block = get_cur_block();
4142 ir_node *block = new_immBlock();
4143 set_cur_block(old_cur_block);
4145 label->declaration_kind = DECLARATION_KIND_LABEL_BLOCK;
4146 label->v.block = block;
4148 ARR_APP1(ir_node *, imature_blocks, block);
4153 static void label_to_firm(const label_statement_t *statement)
4155 ir_node *block = get_label_block(statement->label);
4157 if(get_cur_block() != NULL) {
4158 ir_node *jmp = new_Jmp();
4159 add_immBlock_pred(block, jmp);
4162 set_cur_block(block);
4165 if(statement->statement != NULL) {
4166 statement_to_firm(statement->statement);
4170 static void goto_to_firm(const goto_statement_t *statement)
4172 if(get_cur_block() == NULL)
4175 ir_node *block = get_label_block(statement->label);
4176 ir_node *jmp = new_Jmp();
4177 add_immBlock_pred(block, jmp);
4179 set_cur_block(NULL);
4182 typedef enum modifier_t {
4183 ASM_MODIFIER_WRITE_ONLY = 1 << 0,
4184 ASM_MODIFIER_READ_WRITE = 1 << 1,
4185 ASM_MODIFIER_COMMUTATIVE = 1 << 2,
4186 ASM_MODIFIER_EARLYCLOBBER = 1 << 3,
4189 static void asm_statement_to_firm(const asm_statement_t *statement)
4192 fprintf(stderr, "WARNING asm not implemented yet!\n");
4194 bool needs_memory = false;
4196 size_t n_clobbers = 0;
4197 asm_clobber_t *clobber = statement->clobbers;
4198 for( ; clobber != NULL; clobber = clobber->next) {
4199 if(strcmp(clobber->clobber, "memory") == 0) {
4200 needs_memory = true;
4204 ident *id = new_id_from_str(clobber->clobber);
4205 obstack_ptr_grow(&asm_obst, id);
4208 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4209 ident **clobbers = NULL;
4210 if(n_clobbers > 0) {
4211 clobbers = obstack_finish(&asm_obst);
4214 /* find and count input and output constraints */
4215 asm_constraint_t *constraint = statement->inputs;
4216 for( ; constraint != NULL; constraint = constraint->next) {
4218 bool supports_memop = false;
4219 for(const char *c = constraint->constraints; *c != 0; ++c) {
4220 /* TODO: improve error messages */
4224 panic("multiple alternative assembler constraints not "
4232 supports_memop = true;
4233 obstack_1grow(&asm_obst, *c);
4236 if(modifiers & ASM_MODIFIER_READ_WRITE)
4237 panic("inconsistent register constraints");
4238 modifiers |= ASM_MODIFIER_WRITE_ONLY;
4241 if(modifiers & ASM_MODIFIER_WRITE_ONLY)
4242 panic("inconsistent register constraints");
4243 modifiers |= ASM_MODIFIER_READ_WRITE;
4246 modifiers |= ASM_MODIFIER_EARLYCLOBBER;
4247 panic("early clobber assembler constraint not supported yet");
4250 modifiers |= ASM_MODIFIER_COMMUTATIVE;
4251 panic("commutative assembler constraint not supported yet");
4254 /* skip register preferences stuff... */
4255 while(*c != 0 && *c != ',')
4259 /* skip register preferences stuff... */
4263 obstack_1grow(&asm_obst, *c);
4267 obstack_1grow(&asm_obst, '\0');
4268 const char *constraint_string = obstack_finish(&asm_obst);
4270 needs_memory |= supports_memop;
4271 if(supports_memop) {
4278 static void ms_try_statement_to_firm(ms_try_statement_t *statement) {
4279 statement_to_firm(statement->try_statement);
4280 warningf(&statement->base.source_position, "structured exception handling ignored");
4283 static void leave_statement_to_firm(leave_statement_t *statement) {
4284 errorf(&statement->base.source_position, "__leave not supported yet");
4287 static void statement_to_firm(statement_t *statement)
4289 switch(statement->kind) {
4290 case STATEMENT_INVALID:
4291 panic("invalid statement found");
4293 case STATEMENT_EMPTY:
4296 case STATEMENT_COMPOUND:
4297 compound_statement_to_firm(&statement->compound);
4299 case STATEMENT_RETURN:
4300 return_statement_to_firm(&statement->returns);
4302 case STATEMENT_EXPRESSION:
4303 expression_statement_to_firm(&statement->expression);
4306 if_statement_to_firm(&statement->ifs);
4308 case STATEMENT_WHILE:
4309 while_statement_to_firm(&statement->whiles);
4311 case STATEMENT_DO_WHILE:
4312 do_while_statement_to_firm(&statement->do_while);
4314 case STATEMENT_DECLARATION:
4315 declaration_statement_to_firm(&statement->declaration);
4317 case STATEMENT_BREAK:
4318 create_jump_statement(statement, break_label);
4320 case STATEMENT_CONTINUE:
4321 create_jump_statement(statement, continue_label);
4323 case STATEMENT_SWITCH:
4324 switch_statement_to_firm(&statement->switchs);
4326 case STATEMENT_CASE_LABEL:
4327 case_label_to_firm(&statement->case_label);
4330 for_statement_to_firm(&statement->fors);
4332 case STATEMENT_LABEL:
4333 label_to_firm(&statement->label);
4335 case STATEMENT_GOTO:
4336 goto_to_firm(&statement->gotos);
4339 asm_statement_to_firm(&statement->asms);
4341 case STATEMENT_MS_TRY:
4342 ms_try_statement_to_firm(&statement->ms_try);
4344 case STATEMENT_LEAVE:
4345 leave_statement_to_firm(&statement->leave);
4348 panic("Statement not implemented\n");
4351 static int count_decls_in_expression(const expression_t *expression);
4353 static int count_local_declarations(const declaration_t * decl,
4354 const declaration_t *const end)
4357 for (; decl != end; decl = decl->next) {
4358 if(decl->namespc != NAMESPACE_NORMAL)
4360 const type_t *type = skip_typeref(decl->type);
4361 if (!decl->address_taken && is_type_scalar(type))
4363 const initializer_t *initializer = decl->init.initializer;
4364 /* FIXME: should walk initializer hierarchies... */
4365 if(initializer != NULL && initializer->kind == INITIALIZER_VALUE) {
4366 count += count_decls_in_expression(initializer->value.value);
4372 static int count_decls_in_expression(const expression_t *expression) {
4375 if(expression == NULL)
4378 switch((expression_kind_t) expression->base.kind) {
4379 case EXPR_STATEMENT:
4380 return count_decls_in_stmts(expression->statement.statement);
4382 int count_left = count_decls_in_expression(expression->binary.left);
4383 int count_right = count_decls_in_expression(expression->binary.right);
4384 return count_left + count_right;
4387 return count_decls_in_expression(expression->unary.value);
4389 call_argument_t *argument = expression->call.arguments;
4390 for( ; argument != NULL; argument = argument->next) {
4391 count += count_decls_in_expression(argument->expression);
4398 panic("unexpected expression kind");
4400 case EXPR_COMPOUND_LITERAL:
4404 case EXPR_CONDITIONAL:
4405 count += count_decls_in_expression(expression->conditional.condition);
4406 count += count_decls_in_expression(expression->conditional.true_expression);
4407 count += count_decls_in_expression(expression->conditional.false_expression);
4410 case EXPR_BUILTIN_PREFETCH:
4411 count += count_decls_in_expression(expression->builtin_prefetch.adr);
4412 count += count_decls_in_expression(expression->builtin_prefetch.rw);
4413 count += count_decls_in_expression(expression->builtin_prefetch.locality);
4416 case EXPR_BUILTIN_CONSTANT_P:
4417 count += count_decls_in_expression(expression->builtin_constant.value);
4421 count += count_decls_in_expression(expression->select.compound);
4424 case EXPR_ARRAY_ACCESS:
4425 count += count_decls_in_expression(expression->array_access.array_ref);
4426 count += count_decls_in_expression(expression->array_access.index);
4429 case EXPR_CLASSIFY_TYPE:
4430 count += count_decls_in_expression(expression->classify_type.type_expression);
4434 case EXPR_ALIGNOF: {
4435 expression_t *tp_expression = expression->typeprop.tp_expression;
4436 if (tp_expression != NULL) {
4437 count += count_decls_in_expression(tp_expression);
4443 case EXPR_REFERENCE:
4445 case EXPR_CHARACTER_CONSTANT:
4446 case EXPR_WIDE_CHARACTER_CONSTANT:
4447 case EXPR_STRING_LITERAL:
4448 case EXPR_WIDE_STRING_LITERAL:
4450 case EXPR_BUILTIN_SYMBOL:
4456 /* TODO FIXME: finish/fix that firm patch that allows dynamic value numbers
4457 * (or implement all the missing expressions here/implement a walker)
4463 static int count_decls_in_stmts(const statement_t *stmt)
4466 for (; stmt != NULL; stmt = stmt->base.next) {
4467 switch (stmt->kind) {
4468 case STATEMENT_EMPTY:
4471 case STATEMENT_DECLARATION: {
4472 const declaration_statement_t *const decl_stmt = &stmt->declaration;
4473 count += count_local_declarations(decl_stmt->declarations_begin,
4474 decl_stmt->declarations_end->next);
4478 case STATEMENT_COMPOUND: {
4479 const compound_statement_t *const comp =
4481 count += count_decls_in_stmts(comp->statements);
4485 case STATEMENT_IF: {
4486 const if_statement_t *const if_stmt = &stmt->ifs;
4487 count += count_decls_in_expression(if_stmt->condition);
4488 count += count_decls_in_stmts(if_stmt->true_statement);
4489 count += count_decls_in_stmts(if_stmt->false_statement);
4493 case STATEMENT_SWITCH: {
4494 const switch_statement_t *const switch_stmt = &stmt->switchs;
4495 count += count_decls_in_expression(switch_stmt->expression);
4496 count += count_decls_in_stmts(switch_stmt->body);
4500 case STATEMENT_LABEL: {
4501 const label_statement_t *const label_stmt = &stmt->label;
4502 if(label_stmt->statement != NULL) {
4503 count += count_decls_in_stmts(label_stmt->statement);
4508 case STATEMENT_WHILE: {
4509 const while_statement_t *const while_stmt = &stmt->whiles;
4510 count += count_decls_in_expression(while_stmt->condition);
4511 count += count_decls_in_stmts(while_stmt->body);
4515 case STATEMENT_DO_WHILE: {
4516 const do_while_statement_t *const do_while_stmt = &stmt->do_while;
4517 count += count_decls_in_expression(do_while_stmt->condition);
4518 count += count_decls_in_stmts(do_while_stmt->body);
4522 case STATEMENT_FOR: {
4523 const for_statement_t *const for_stmt = &stmt->fors;
4524 count += count_local_declarations(for_stmt->scope.declarations, NULL);
4525 count += count_decls_in_expression(for_stmt->initialisation);
4526 count += count_decls_in_expression(for_stmt->condition);
4527 count += count_decls_in_expression(for_stmt->step);
4528 count += count_decls_in_stmts(for_stmt->body);
4532 case STATEMENT_CASE_LABEL: {
4533 const case_label_statement_t *label = &stmt->case_label;
4534 count += count_decls_in_expression(label->expression);
4535 if(label->statement != NULL) {
4536 count += count_decls_in_stmts(label->statement);
4542 case STATEMENT_BREAK:
4543 case STATEMENT_CONTINUE:
4546 case STATEMENT_EXPRESSION: {
4547 const expression_statement_t *expr_stmt = &stmt->expression;
4548 count += count_decls_in_expression(expr_stmt->expression);
4552 case STATEMENT_GOTO:
4553 case STATEMENT_LEAVE:
4554 case STATEMENT_INVALID:
4557 case STATEMENT_RETURN: {
4558 const return_statement_t *ret_stmt = &stmt->returns;
4559 count += count_decls_in_expression(ret_stmt->value);
4563 case STATEMENT_MS_TRY: {
4564 const ms_try_statement_t *const try_stmt = &stmt->ms_try;
4565 count += count_decls_in_stmts(try_stmt->try_statement);
4566 if(try_stmt->except_expression != NULL)
4567 count += count_decls_in_expression(try_stmt->except_expression);
4568 count += count_decls_in_stmts(try_stmt->final_statement);
4576 static int get_function_n_local_vars(declaration_t *declaration)
4580 /* count parameters */
4581 count += count_local_declarations(declaration->scope.declarations, NULL);
4583 /* count local variables declared in body */
4584 count += count_decls_in_stmts(declaration->init.statement);
4589 static void initialize_function_parameters(declaration_t *declaration)
4591 ir_graph *irg = current_ir_graph;
4592 ir_node *args = get_irg_args(irg);
4593 ir_node *start_block = get_irg_start_block(irg);
4594 ir_type *function_irtype = get_ir_type(declaration->type);
4597 declaration_t *parameter = declaration->scope.declarations;
4598 for( ; parameter != NULL; parameter = parameter->next, ++n) {
4599 assert(parameter->declaration_kind == DECLARATION_KIND_UNKNOWN);
4600 type_t *type = skip_typeref(parameter->type);
4602 bool needs_entity = parameter->address_taken;
4603 assert(!is_type_array(type));
4604 if(is_type_compound(type)) {
4605 needs_entity = true;
4609 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
4610 ident *id = new_id_from_str(parameter->symbol->string);
4611 set_entity_ident(entity, id);
4613 parameter->declaration_kind
4614 = DECLARATION_KIND_LOCAL_VARIABLE_ENTITY;
4615 parameter->v.entity = entity;
4619 ir_mode *mode = get_ir_mode(parameter->type);
4621 ir_node *proj = new_r_Proj(irg, start_block, args, mode, pn);
4623 parameter->declaration_kind = DECLARATION_KIND_LOCAL_VARIABLE;
4624 parameter->v.value_number = next_value_number_function;
4625 set_irg_loc_description(current_ir_graph, next_value_number_function, parameter);
4626 ++next_value_number_function;
4628 set_value(parameter->v.value_number, proj);
4633 * Handle additional decl modifiers for IR-graphs
4635 * @param irg the IR-graph
4636 * @param dec_modifiers additional modifiers
4638 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
4640 if (decl_modifiers & DM_NORETURN) {
4641 /* TRUE if the declaration includes the Microsoft
4642 __declspec(noreturn) specifier. */
4643 set_irg_additional_property(irg, mtp_property_noreturn);
4645 if (decl_modifiers & DM_NOTHROW) {
4646 /* TRUE if the declaration includes the Microsoft
4647 __declspec(nothrow) specifier. */
4648 set_irg_additional_property(irg, mtp_property_nothrow);
4650 if (decl_modifiers & DM_NAKED) {
4651 /* TRUE if the declaration includes the Microsoft
4652 __declspec(naked) specifier. */
4653 set_irg_additional_property(irg, mtp_property_naked);
4655 if (decl_modifiers & DM_FORCEINLINE) {
4656 /* TRUE if the declaration includes the
4657 Microsoft __forceinline specifier. */
4658 set_irg_inline_property(irg, irg_inline_forced);
4660 if (decl_modifiers & DM_NOINLINE) {
4661 /* TRUE if the declaration includes the Microsoft
4662 __declspec(noinline) specifier. */
4663 set_irg_inline_property(irg, irg_inline_forbidden);
4667 static void create_function(declaration_t *declaration)
4669 ir_entity *function_entity = get_function_entity(declaration);
4671 if(declaration->init.statement == NULL)
4674 current_function_decl = declaration;
4675 current_function_name = NULL;
4676 current_funcsig = NULL;
4678 assert(imature_blocks == NULL);
4679 imature_blocks = NEW_ARR_F(ir_node*, 0);
4681 int n_local_vars = get_function_n_local_vars(declaration);
4682 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
4683 ir_node *first_block = get_cur_block();
4685 /* set inline flags */
4686 if (declaration->is_inline)
4687 set_irg_inline_property(irg, irg_inline_recomended);
4688 handle_decl_modifier_irg(irg, declaration->modifiers);
4690 next_value_number_function = 0;
4691 initialize_function_parameters(declaration);
4693 statement_to_firm(declaration->init.statement);
4695 ir_node *end_block = get_irg_end_block(irg);
4697 /* do we have a return statement yet? */
4698 if(get_cur_block() != NULL) {
4699 type_t *type = skip_typeref(declaration->type);
4700 assert(is_type_function(type));
4701 const function_type_t *func_type = &type->function;
4702 const type_t *return_type
4703 = skip_typeref(func_type->return_type);
4706 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
4707 ret = new_Return(get_store(), 0, NULL);
4710 if(is_type_scalar(return_type)) {
4711 mode = get_ir_mode(func_type->return_type);
4717 /* ยง5.1.2.2.3 main implicitly returns 0 */
4718 if (strcmp(declaration->symbol->string, "main") == 0) {
4719 in[0] = new_Const(mode, get_mode_null(mode));
4721 in[0] = new_Unknown(mode);
4723 ret = new_Return(get_store(), 1, in);
4725 add_immBlock_pred(end_block, ret);
4728 for(int i = 0; i < ARR_LEN(imature_blocks); ++i) {
4729 mature_immBlock(imature_blocks[i]);
4731 DEL_ARR_F(imature_blocks);
4732 imature_blocks = NULL;
4734 mature_immBlock(first_block);
4735 mature_immBlock(end_block);
4737 irg_finalize_cons(irg);
4739 /* finalize the frame type */
4740 ir_type *frame_type = get_irg_frame_type(irg);
4741 int n = get_compound_n_members(frame_type);
4744 for(int i = 0; i < n; ++i) {
4745 ir_entity *entity = get_compound_member(frame_type, i);
4746 ir_type *entity_type = get_entity_type(entity);
4748 int align = get_type_alignment_bytes(entity_type);
4749 if(align > align_all)
4753 misalign = offset % align;
4755 offset += align - misalign;
4759 set_entity_offset(entity, offset);
4760 offset += get_type_size_bytes(entity_type);
4762 set_type_size_bytes(frame_type, offset);
4763 set_type_alignment_bytes(frame_type, align_all);
4768 static void scope_to_firm(scope_t *scope)
4770 /* first pass: create declarations */
4771 declaration_t *declaration = scope->declarations;
4772 for( ; declaration != NULL; declaration = declaration->next) {
4773 if(declaration->namespc != NAMESPACE_NORMAL)
4775 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4776 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4778 if(declaration->symbol == NULL)
4781 type_t *type = skip_typeref(declaration->type);
4782 if(is_type_function(type)) {
4783 get_function_entity(declaration);
4785 create_global_variable(declaration);
4789 /* second pass: create code/initializers */
4790 declaration = scope->declarations;
4791 for( ; declaration != NULL; declaration = declaration->next) {
4792 if(declaration->namespc != NAMESPACE_NORMAL)
4794 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY
4795 || declaration->storage_class == STORAGE_CLASS_TYPEDEF)
4797 if(declaration->symbol == NULL)
4800 type_t *type = declaration->type;
4801 if(type->kind == TYPE_FUNCTION) {
4802 create_function(declaration);
4804 assert(declaration->declaration_kind
4805 == DECLARATION_KIND_GLOBAL_VARIABLE);
4806 current_ir_graph = get_const_code_irg();
4807 create_declaration_initializer(declaration);
4812 void init_ast2firm(void)
4814 obstack_init(&asm_obst);
4815 init_atomic_modes();
4817 /* create idents for all known runtime functions */
4818 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
4819 predef_idents[rts_data[i].id] = new_id_from_str(rts_data[i].name);
4823 static void init_ir_types(void)
4825 static int ir_types_initialized = 0;
4826 if(ir_types_initialized)
4828 ir_types_initialized = 1;
4830 type_const_char = make_atomic_type(ATOMIC_TYPE_CHAR, TYPE_QUALIFIER_CONST);
4831 type_void = make_atomic_type(ATOMIC_TYPE_VOID, TYPE_QUALIFIER_NONE);
4832 type_int = make_atomic_type(ATOMIC_TYPE_INT, TYPE_QUALIFIER_NONE);
4834 ir_type_int = get_ir_type(type_int);
4835 ir_type_const_char = get_ir_type(type_const_char);
4836 ir_type_wchar_t = get_ir_type(type_wchar_t);
4837 ir_type_void = get_ir_type(type_int); /* we don't have a real void
4840 type_void->base.firm_type = ir_type_void;
4843 void exit_ast2firm(void)
4845 obstack_free(&asm_obst, NULL);
4848 void translation_unit_to_firm(translation_unit_t *unit)
4850 /* just to be sure */
4851 continue_label = NULL;
4853 current_switch_cond = NULL;
4857 scope_to_firm(&unit->scope);