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
27 #include <libfirm/firm.h>
28 #include <libfirm/adt/obst.h>
29 #include <libfirm/be.h>
33 #include "adt/error.h"
34 #include "adt/array.h"
41 #include "diagnostic.h"
42 #include "lang_features.h"
44 #include "type_hash.h"
46 #include "walk_statements.h"
48 #include "entitymap_t.h"
49 #include "driver/firm_opt.h"
50 #include "driver/firm_cmdline.h"
52 static ir_type *ir_type_const_char;
53 static ir_type *ir_type_wchar_t;
54 static ir_type *ir_type_void;
55 static ir_type *ir_type_int;
57 /* architecture specific floating point arithmetic mode (if any) */
58 static ir_mode *mode_float_arithmetic;
60 static int next_value_number_function;
61 static ir_node *continue_label;
62 static ir_node *break_label;
63 static ir_node *current_switch_cond;
64 static bool saw_default_label;
65 static label_t **all_labels;
66 static entity_t **inner_functions;
67 static ir_node *ijmp_list;
68 static bool constant_folding;
70 extern bool have_const_functions;
72 static const entity_t *current_function_entity;
73 static ir_node *current_function_name;
74 static ir_node *current_funcsig;
75 static switch_statement_t *current_switch;
76 static ir_graph *current_function;
77 static translation_unit_t *current_translation_unit;
79 static entitymap_t entitymap;
81 static struct obstack asm_obst;
83 typedef enum declaration_kind_t {
84 DECLARATION_KIND_UNKNOWN,
85 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
86 DECLARATION_KIND_GLOBAL_VARIABLE,
87 DECLARATION_KIND_LOCAL_VARIABLE,
88 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
89 DECLARATION_KIND_PARAMETER,
90 DECLARATION_KIND_PARAMETER_ENTITY,
91 DECLARATION_KIND_FUNCTION,
92 DECLARATION_KIND_COMPOUND_MEMBER,
93 DECLARATION_KIND_INNER_FUNCTION
96 static ir_mode *get_ir_mode_storage(type_t *type);
98 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
99 * int that it returns bigger modes for floating point on some platforms
100 * (x87 internally does arithemtic with 80bits)
102 static ir_mode *get_ir_mode_arithmetic(type_t *type);
104 static ir_type *get_ir_type_incomplete(type_t *type);
106 static void enqueue_inner_function(entity_t *entity)
108 ARR_APP1(entity_t*, inner_functions, entity);
111 static entity_t *next_inner_function(void)
113 int len = ARR_LEN(inner_functions);
117 entity_t *entity = inner_functions[len-1];
118 ARR_SHRINKLEN(inner_functions, len-1);
123 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
125 const entity_t *entity = get_irg_loc_description(irg, pos);
127 if (entity != NULL) {
128 warningf(&entity->base.source_position,
129 "%s '%#T' might be used uninitialized",
130 get_entity_kind_name(entity->kind),
131 entity->declaration.type, entity->base.symbol);
133 return new_r_Unknown(irg, mode);
136 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
138 const source_position_t *pos = (const source_position_t*) dbg;
141 return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
145 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
147 const source_position_t *pos = (const source_position_t*) dbg;
152 return pos->input_name;
155 static dbg_info *get_dbg_info(const source_position_t *pos)
157 return (dbg_info*) pos;
160 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
162 static ir_mode *mode_int, *mode_uint;
164 static ir_node *_expression_to_firm(const expression_t *expression);
165 static ir_node *expression_to_firm(const expression_t *expression);
166 static void create_local_declaration(entity_t *entity);
168 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
170 unsigned flags = get_atomic_type_flags(kind);
171 unsigned size = get_atomic_type_size(kind);
172 if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
173 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
176 unsigned bit_size = size * 8;
177 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
178 unsigned modulo_shift;
179 ir_mode_arithmetic arithmetic;
181 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
182 assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
183 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
185 sort = irms_int_number;
186 arithmetic = irma_twos_complement;
187 modulo_shift = bit_size < machine_size ? machine_size : bit_size;
189 assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
190 snprintf(name, sizeof(name), "F%u", bit_size);
191 sort = irms_float_number;
192 arithmetic = irma_ieee754;
195 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
203 * Initialises the atomic modes depending on the machine size.
205 static void init_atomic_modes(void)
207 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
208 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
210 mode_int = atomic_modes[ATOMIC_TYPE_INT];
211 mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
213 /* there's no real void type in firm */
214 atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
216 /* initialize pointer modes */
218 ir_mode_sort sort = irms_reference;
219 unsigned bit_size = machine_size;
221 ir_mode_arithmetic arithmetic = irma_twos_complement;
222 unsigned modulo_shift
223 = bit_size < machine_size ? machine_size : bit_size;
225 snprintf(name, sizeof(name), "p%u", machine_size);
226 ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
229 set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
230 set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
232 /* Hmm, pointers should be machine size */
233 set_modeP_data(ptr_mode);
234 set_modeP_code(ptr_mode);
237 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
239 assert(kind <= ATOMIC_TYPE_LAST);
240 return atomic_modes[kind];
243 static unsigned get_compound_type_size(compound_type_t *type)
245 ir_type *irtype = get_ir_type((type_t*) type);
246 return get_type_size_bytes(irtype);
249 static unsigned get_array_type_size(array_type_t *type)
251 assert(!type->is_vla);
252 ir_type *irtype = get_ir_type((type_t*) type);
253 return get_type_size_bytes(irtype);
256 static unsigned get_type_size_const(type_t *type)
260 panic("error type occurred");
262 return get_atomic_type_size(type->atomic.akind);
264 return 2 * get_atomic_type_size(type->complex.akind);
266 return get_atomic_type_size(type->imaginary.akind);
268 return get_mode_size_bytes(mode_int);
269 case TYPE_COMPOUND_UNION:
270 case TYPE_COMPOUND_STRUCT:
271 return get_compound_type_size(&type->compound);
273 /* just a pointer to the function */
274 return get_mode_size_bytes(mode_P_code);
277 return get_mode_size_bytes(mode_P_data);
279 return get_array_type_size(&type->array);
281 return get_type_size_const(type->builtin.real_type);
283 panic("type size of bitfield request");
289 panic("Trying to determine size of invalid type");
292 static ir_node *get_vla_size(array_type_t *const type)
294 ir_node *size_node = type->size_node;
295 if (size_node == NULL) {
296 size_node = expression_to_firm(type->size_expression);
297 type->size_node = size_node;
302 static ir_node *get_type_size(type_t *type)
304 type = skip_typeref(type);
306 if (is_type_array(type) && type->array.is_vla) {
307 ir_node *size_node = get_vla_size(&type->array);
308 ir_node *elem_size = get_type_size(type->array.element_type);
309 ir_mode *mode = get_irn_mode(size_node);
310 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
314 ir_mode *mode = get_ir_mode_storage(type_size_t);
316 sym.type_p = get_ir_type(type);
317 return new_SymConst(mode, sym, symconst_type_size);
320 static unsigned count_parameters(const function_type_t *function_type)
324 function_parameter_t *parameter = function_type->parameters;
325 for ( ; parameter != NULL; parameter = parameter->next) {
332 static type_t *get_aligned_type(type_t *type, int alignment)
337 type = skip_typeref(type);
338 if (alignment > type->base.alignment) {
339 type_t *copy = duplicate_type(type);
340 copy->base.alignment = alignment;
342 type = typehash_insert(copy);
344 obstack_free(type_obst, copy);
351 * Creates a Firm type for an atomic type
353 static ir_type *create_atomic_type(const atomic_type_t *type)
355 atomic_type_kind_t kind = type->akind;
356 ir_mode *mode = atomic_modes[kind];
357 ident *id = get_mode_ident(mode);
358 ir_type *irtype = new_type_primitive(id, mode);
360 set_type_alignment_bytes(irtype, type->base.alignment);
366 * Creates a Firm type for a complex type
368 static ir_type *create_complex_type(const complex_type_t *type)
370 atomic_type_kind_t kind = type->akind;
371 ir_mode *mode = atomic_modes[kind];
372 ident *id = get_mode_ident(mode);
376 /* FIXME: finish the array */
381 * Creates a Firm type for an imaginary type
383 static ir_type *create_imaginary_type(const imaginary_type_t *type)
385 atomic_type_kind_t kind = type->akind;
386 ir_mode *mode = atomic_modes[kind];
387 ident *id = get_mode_ident(mode);
388 ir_type *irtype = new_type_primitive(id, mode);
390 set_type_alignment_bytes(irtype, type->base.alignment);
396 * return type of a parameter (and take transparent union gnu extension into
399 static type_t *get_parameter_type(type_t *type)
401 type = skip_typeref(type);
402 if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
403 compound_t *compound = type->compound.compound;
404 type = compound->members.entities->declaration.type;
410 static ir_type *create_method_type(const function_type_t *function_type)
412 type_t *return_type = skip_typeref(function_type->return_type);
414 ident *id = id_unique("functiontype.%u");
415 int n_parameters = count_parameters(function_type);
416 int n_results = return_type == type_void ? 0 : 1;
417 ir_type *irtype = new_type_method(id, n_parameters, n_results);
419 if (return_type != type_void) {
420 ir_type *restype = get_ir_type(return_type);
421 set_method_res_type(irtype, 0, restype);
424 function_parameter_t *parameter = function_type->parameters;
426 for ( ; parameter != NULL; parameter = parameter->next) {
427 type_t *type = get_parameter_type(parameter->type);
428 ir_type *p_irtype = get_ir_type(type);
429 set_method_param_type(irtype, n, p_irtype);
433 if (function_type->variadic || function_type->unspecified_parameters) {
434 set_method_variadicity(irtype, variadicity_variadic);
437 unsigned cc = get_method_calling_convention(irtype);
438 switch (function_type->calling_convention) {
439 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
442 set_method_calling_convention(irtype, SET_CDECL(cc));
446 if (function_type->variadic || function_type->unspecified_parameters)
449 /* only non-variadic function can use stdcall, else use cdecl */
450 set_method_calling_convention(irtype, SET_STDCALL(cc));
454 if (function_type->variadic || function_type->unspecified_parameters)
456 /* only non-variadic function can use fastcall, else use cdecl */
457 set_method_calling_convention(irtype, SET_FASTCALL(cc));
461 /* Hmm, leave default, not accepted by the parser yet. */
468 static ir_type *create_pointer_type(pointer_type_t *type)
470 type_t *points_to = type->points_to;
471 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
472 ir_type *ir_type = new_type_pointer(id_unique("pointer.%u"),
473 ir_points_to, mode_P_data);
478 static ir_type *create_reference_type(reference_type_t *type)
480 type_t *refers_to = type->refers_to;
481 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
482 ir_type *ir_type = new_type_pointer(id_unique("reference.%u"),
483 ir_refers_to, mode_P_data);
488 static ir_type *create_array_type(array_type_t *type)
490 type_t *element_type = type->element_type;
491 ir_type *ir_element_type = get_ir_type(element_type);
493 ident *id = id_unique("array.%u");
494 ir_type *ir_type = new_type_array(id, 1, ir_element_type);
496 const int align = get_type_alignment_bytes(ir_element_type);
497 set_type_alignment_bytes(ir_type, align);
499 if (type->size_constant) {
500 int n_elements = type->size;
502 set_array_bounds_int(ir_type, 0, 0, n_elements);
504 size_t elemsize = get_type_size_bytes(ir_element_type);
505 if (elemsize % align > 0) {
506 elemsize += align - (elemsize % align);
508 set_type_size_bytes(ir_type, n_elements * elemsize);
510 set_array_lower_bound_int(ir_type, 0, 0);
512 set_type_state(ir_type, layout_fixed);
518 * Return the signed integer type of size bits.
520 * @param size the size
522 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
525 static ir_mode *s_modes[64 + 1] = {NULL, };
529 if (size <= 0 || size > 64)
532 mode = s_modes[size];
536 snprintf(name, sizeof(name), "bf_I%u", size);
537 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
538 size <= 32 ? 32 : size );
539 s_modes[size] = mode;
543 snprintf(name, sizeof(name), "I%u", size);
544 ident *id = new_id_from_str(name);
545 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
546 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
547 set_primitive_base_type(res, base_tp);
553 * Return the unsigned integer type of size bits.
555 * @param size the size
557 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
560 static ir_mode *u_modes[64 + 1] = {NULL, };
564 if (size <= 0 || size > 64)
567 mode = u_modes[size];
571 snprintf(name, sizeof(name), "bf_U%u", size);
572 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
573 size <= 32 ? 32 : size );
574 u_modes[size] = mode;
579 snprintf(name, sizeof(name), "U%u", size);
580 ident *id = new_id_from_str(name);
581 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
582 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
583 set_primitive_base_type(res, base_tp);
588 static ir_type *create_bitfield_type(bitfield_type_t *const type)
590 type_t *base = skip_typeref(type->base_type);
591 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
592 ir_type *irbase = get_ir_type(base);
594 unsigned size = type->bit_size;
596 assert(!is_type_float(base));
597 if (is_type_signed(base)) {
598 return get_signed_int_type_for_bit_size(irbase, size);
600 return get_unsigned_int_type_for_bit_size(irbase, size);
604 #define INVALID_TYPE ((ir_type_ptr)-1)
607 COMPOUND_IS_STRUCT = false,
608 COMPOUND_IS_UNION = true
612 * Construct firm type from ast struct type.
614 * As anonymous inner structs get flattened to a single firm type, we might get
615 * irtype, outer_offset and out_align passed (they represent the position of
616 * the anonymous inner struct inside the resulting firm struct)
618 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
619 size_t *outer_offset, size_t *outer_align,
620 bool incomplete, bool is_union)
622 compound_t *compound = type->compound;
624 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
625 return compound->irtype;
628 size_t align_all = 1;
630 size_t bit_offset = 0;
633 if (irtype == NULL) {
634 symbol_t *symbol = compound->base.symbol;
636 if (symbol != NULL) {
637 id = new_id_from_str(symbol->string);
640 id = id_unique("__anonymous_union.%u");
642 id = id_unique("__anonymous_struct.%u");
645 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
648 irtype = new_d_type_union(id, dbgi);
650 irtype = new_d_type_struct(id, dbgi);
653 compound->irtype_complete = false;
654 compound->irtype = irtype;
656 offset = *outer_offset;
657 align_all = *outer_align;
663 compound->irtype_complete = true;
665 entity_t *entry = compound->members.entities;
666 for ( ; entry != NULL; entry = entry->base.next) {
667 if (entry->kind != ENTITY_COMPOUND_MEMBER)
670 size_t prev_offset = offset;
672 symbol_t *symbol = entry->base.symbol;
673 type_t *entry_type = skip_typeref(entry->declaration.type);
675 = get_aligned_type(entry_type, entry->compound_member.alignment);
676 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
679 if (symbol != NULL) {
680 ident = new_id_from_str(symbol->string);
682 if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
683 create_compound_type(&entry_type->compound, irtype, &offset,
684 &align_all, false, COMPOUND_IS_STRUCT);
685 goto finished_member;
686 } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
687 create_compound_type(&entry_type->compound, irtype, &offset,
688 &align_all, false, COMPOUND_IS_UNION);
689 goto finished_member;
691 assert(entry_type->kind == TYPE_BITFIELD);
693 ident = id_unique("anon.%u");
696 ir_type *base_irtype;
697 if (entry_type->kind == TYPE_BITFIELD) {
698 base_irtype = get_ir_type(entry_type->bitfield.base_type);
700 base_irtype = get_ir_type(entry_type);
703 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
704 size_t misalign = offset % entry_alignment;
706 ir_type *entry_irtype = get_ir_type(entry_type);
707 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
710 size_t bits_remainder;
711 if (entry_type->kind == TYPE_BITFIELD) {
712 size_t size_bits = entry_type->bitfield.bit_size;
713 size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
715 if (size_bits > rest_size_bits) {
716 /* start a new bucket */
717 offset += entry_alignment - misalign;
723 /* put into current bucket */
724 base = offset - misalign;
725 bits_remainder = misalign * 8 + bit_offset;
728 offset += size_bits / 8;
729 bit_offset = bit_offset + (size_bits % 8);
731 size_t entry_size = get_type_size_bytes(base_irtype);
732 if (misalign > 0 || bit_offset > 0)
733 offset += entry_alignment - misalign;
737 offset += entry_size;
741 if (entry_alignment > align_all) {
742 if (entry_alignment % align_all != 0) {
743 panic("uneven alignments not supported yet");
745 align_all = entry_alignment;
748 set_entity_offset(entity, base);
749 set_entity_offset_bits_remainder(entity,
750 (unsigned char) bits_remainder);
751 //add_struct_member(irtype, entity);
752 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
753 assert(entry->compound_member.entity == NULL);
754 entry->compound_member.entity = entity;
758 size_t entry_size = offset - prev_offset;
759 if (entry_size > size) {
771 size_t misalign = offset % align_all;
772 if (misalign > 0 || bit_offset > 0) {
773 size += align_all - misalign;
776 if (outer_offset != NULL) {
778 *outer_offset = offset;
780 *outer_offset += size;
783 if (align_all > *outer_align) {
784 if (align_all % *outer_align != 0) {
785 panic("uneven alignments not supported yet");
787 *outer_align = align_all;
790 set_type_alignment_bytes(irtype, align_all);
791 set_type_size_bytes(irtype, size);
792 set_type_state(irtype, layout_fixed);
798 static ir_type *create_enum_type(enum_type_t *const type)
800 type->base.firm_type = ir_type_int;
802 ir_mode *const mode = mode_int;
803 tarval *const one = get_mode_one(mode);
804 tarval * tv_next = get_tarval_null(mode);
806 bool constant_folding_old = constant_folding;
807 constant_folding = true;
809 enum_t *enume = type->enume;
810 entity_t *entry = enume->base.next;
811 for (; entry != NULL; entry = entry->base.next) {
812 if (entry->kind != ENTITY_ENUM_VALUE)
815 expression_t *const init = entry->enum_value.value;
817 ir_node *const cnst = expression_to_firm(init);
818 if (!is_Const(cnst)) {
819 panic("couldn't fold constant");
821 tv_next = get_Const_tarval(cnst);
823 entry->enum_value.tv = tv_next;
824 tv_next = tarval_add(tv_next, one);
827 constant_folding = constant_folding_old;
832 static ir_type *get_ir_type_incomplete(type_t *type)
834 assert(type != NULL);
835 type = skip_typeref(type);
837 if (type->base.firm_type != NULL) {
838 assert(type->base.firm_type != INVALID_TYPE);
839 return type->base.firm_type;
842 switch (type->kind) {
843 case TYPE_COMPOUND_STRUCT:
844 return create_compound_type(&type->compound, NULL, NULL, NULL,
845 true, COMPOUND_IS_STRUCT);
846 case TYPE_COMPOUND_UNION:
847 return create_compound_type(&type->compound, NULL, NULL, NULL,
848 true, COMPOUND_IS_UNION);
850 return get_ir_type(type);
854 ir_type *get_ir_type(type_t *type)
856 assert(type != NULL);
858 type = skip_typeref(type);
860 if (type->base.firm_type != NULL) {
861 assert(type->base.firm_type != INVALID_TYPE);
862 return type->base.firm_type;
865 ir_type *firm_type = NULL;
866 switch (type->kind) {
868 /* Happens while constant folding, when there was an error */
869 return create_atomic_type(&type_void->atomic);
872 firm_type = create_atomic_type(&type->atomic);
875 firm_type = create_complex_type(&type->complex);
878 firm_type = create_imaginary_type(&type->imaginary);
881 firm_type = create_method_type(&type->function);
884 firm_type = create_pointer_type(&type->pointer);
887 firm_type = create_reference_type(&type->reference);
890 firm_type = create_array_type(&type->array);
892 case TYPE_COMPOUND_STRUCT:
893 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
894 false, COMPOUND_IS_STRUCT);
896 case TYPE_COMPOUND_UNION:
897 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
898 false, COMPOUND_IS_UNION);
901 firm_type = create_enum_type(&type->enumt);
904 firm_type = get_ir_type(type->builtin.real_type);
907 firm_type = create_bitfield_type(&type->bitfield);
915 if (firm_type == NULL)
916 panic("unknown type found");
918 type->base.firm_type = firm_type;
922 static ir_mode *get_ir_mode_storage(type_t *type)
924 ir_type *irtype = get_ir_type(type);
926 /* firm doesn't report a mode for arrays somehow... */
927 if (is_Array_type(irtype)) {
931 ir_mode *mode = get_type_mode(irtype);
932 assert(mode != NULL);
936 static ir_mode *get_ir_mode_arithmetic(type_t *type)
938 ir_mode *mode = get_ir_mode_storage(type);
939 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
940 return mode_float_arithmetic;
946 /** Names of the runtime functions. */
947 static const struct {
948 int id; /**< the rts id */
949 int n_res; /**< number of return values */
950 const char *name; /**< the name of the rts function */
951 int n_params; /**< number of parameters */
952 unsigned flags; /**< language flags */
954 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
955 { rts_abort, 0, "abort", 0, _C89 },
956 { rts_alloca, 1, "alloca", 1, _ALL },
957 { rts_abs, 1, "abs", 1, _C89 },
958 { rts_labs, 1, "labs", 1, _C89 },
959 { rts_llabs, 1, "llabs", 1, _C99 },
960 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
962 { rts_fabs, 1, "fabs", 1, _C89 },
963 { rts_sqrt, 1, "sqrt", 1, _C89 },
964 { rts_cbrt, 1, "cbrt", 1, _C99 },
965 { rts_exp, 1, "exp", 1, _C89 },
966 { rts_exp2, 1, "exp2", 1, _C89 },
967 { rts_exp10, 1, "exp10", 1, _GNUC },
968 { rts_log, 1, "log", 1, _C89 },
969 { rts_log2, 1, "log2", 1, _C89 },
970 { rts_log10, 1, "log10", 1, _C89 },
971 { rts_pow, 1, "pow", 2, _C89 },
972 { rts_sin, 1, "sin", 1, _C89 },
973 { rts_cos, 1, "cos", 1, _C89 },
974 { rts_tan, 1, "tan", 1, _C89 },
975 { rts_asin, 1, "asin", 1, _C89 },
976 { rts_acos, 1, "acos", 1, _C89 },
977 { rts_atan, 1, "atan", 1, _C89 },
978 { rts_sinh, 1, "sinh", 1, _C89 },
979 { rts_cosh, 1, "cosh", 1, _C89 },
980 { rts_tanh, 1, "tanh", 1, _C89 },
982 { rts_fabsf, 1, "fabsf", 1, _C99 },
983 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
984 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
985 { rts_expf, 1, "expf", 1, _C99 },
986 { rts_exp2f, 1, "exp2f", 1, _C99 },
987 { rts_exp10f, 1, "exp10f", 1, _GNUC },
988 { rts_logf, 1, "logf", 1, _C99 },
989 { rts_log2f, 1, "log2f", 1, _C99 },
990 { rts_log10f, 1, "log10f", 1, _C99 },
991 { rts_powf, 1, "powf", 2, _C99 },
992 { rts_sinf, 1, "sinf", 1, _C99 },
993 { rts_cosf, 1, "cosf", 1, _C99 },
994 { rts_tanf, 1, "tanf", 1, _C99 },
995 { rts_asinf, 1, "asinf", 1, _C99 },
996 { rts_acosf, 1, "acosf", 1, _C99 },
997 { rts_atanf, 1, "atanf", 1, _C99 },
998 { rts_sinhf, 1, "sinhf", 1, _C99 },
999 { rts_coshf, 1, "coshf", 1, _C99 },
1000 { rts_tanhf, 1, "tanhf", 1, _C99 },
1002 { rts_fabsl, 1, "fabsl", 1, _C99 },
1003 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
1004 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
1005 { rts_expl, 1, "expl", 1, _C99 },
1006 { rts_exp2l, 1, "exp2l", 1, _C99 },
1007 { rts_exp10l, 1, "exp10l", 1, _GNUC },
1008 { rts_logl, 1, "logl", 1, _C99 },
1009 { rts_log2l, 1, "log2l", 1, _C99 },
1010 { rts_log10l, 1, "log10l", 1, _C99 },
1011 { rts_powl, 1, "powl", 2, _C99 },
1012 { rts_sinl, 1, "sinl", 1, _C99 },
1013 { rts_cosl, 1, "cosl", 1, _C99 },
1014 { rts_tanl, 1, "tanl", 1, _C99 },
1015 { rts_asinl, 1, "asinl", 1, _C99 },
1016 { rts_acosl, 1, "acosl", 1, _C99 },
1017 { rts_atanl, 1, "atanl", 1, _C99 },
1018 { rts_sinhl, 1, "sinhl", 1, _C99 },
1019 { rts_coshl, 1, "coshl", 1, _C99 },
1020 { rts_tanhl, 1, "tanhl", 1, _C99 },
1022 { rts_memcpy, 1, "memcpy", 3, _C89 }, /* HMM, man say its C99 */
1023 { rts_memset, 1, "memset", 3, _C89 }, /* HMM, man say its C99 */
1024 { rts_strcmp, 1, "strcmp", 2, _C89 },
1025 { rts_strncmp, 1, "strncmp", 3, _C89 }
1028 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
1030 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
1033 * Handle GNU attributes for entities
1035 * @param ent the entity
1036 * @param decl the routine declaration
1038 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
1040 assert(is_declaration(entity));
1041 decl_modifiers_t modifiers = entity->declaration.modifiers;
1042 if (modifiers & DM_PURE) {
1043 /* TRUE if the declaration includes the GNU
1044 __attribute__((pure)) specifier. */
1045 set_entity_additional_property(irentity, mtp_property_pure);
1047 if (modifiers & DM_CONST) {
1048 set_entity_additional_property(irentity, mtp_property_const);
1049 have_const_functions = true;
1051 if (modifiers & DM_USED) {
1052 /* TRUE if the declaration includes the GNU
1053 __attribute__((used)) specifier. */
1054 set_entity_stickyness(irentity, stickyness_sticky);
1058 static bool is_main(entity_t *entity)
1060 static symbol_t *sym_main = NULL;
1061 if (sym_main == NULL) {
1062 sym_main = symbol_table_insert("main");
1065 if (entity->base.symbol != sym_main)
1067 /* must be in outermost scope */
1068 if (entity->base.parent_scope != ¤t_translation_unit->scope)
1075 * Creates an entity representing a function.
1077 * @param declaration the function declaration
1079 static ir_entity *get_function_entity(entity_t *entity)
1081 assert(entity->kind == ENTITY_FUNCTION);
1082 if (entity->function.entity != NULL) {
1083 return entity->function.entity;
1086 if (is_main(entity)) {
1087 /* force main to C linkage */
1088 type_t *type = entity->declaration.type;
1089 assert(is_type_function(type));
1090 if (type->function.linkage != LINKAGE_C) {
1091 type_t *new_type = duplicate_type(type);
1092 new_type->function.linkage = LINKAGE_C;
1094 type = typehash_insert(new_type);
1095 if (type != new_type) {
1096 obstack_free(type_obst, new_type);
1098 entity->declaration.type = type;
1102 symbol_t *symbol = entity->base.symbol;
1103 ident *id = new_id_from_str(symbol->string);
1105 ir_type *global_type = get_glob_type();
1106 ir_type *ir_type_method = get_ir_type(entity->declaration.type);
1107 bool const has_body = entity->function.statement != NULL;
1109 /* already an entity defined? */
1110 ir_entity *irentity = entitymap_get(&entitymap, symbol);
1111 if (irentity != NULL) {
1112 if (get_entity_visibility(irentity) == visibility_external_allocated
1114 set_entity_visibility(irentity, visibility_external_visible);
1116 goto entity_created;
1119 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1120 irentity = new_d_entity(global_type, id, ir_type_method, dbgi);
1121 set_entity_ld_ident(irentity, create_ld_ident(entity));
1123 handle_gnu_attributes_ent(irentity, entity);
1125 /* static inline => local
1126 * extern inline => local
1127 * inline without definition => local
1128 * inline with definition => external_visible */
1129 storage_class_tag_t const storage_class
1130 = (storage_class_tag_t) entity->declaration.storage_class;
1131 bool const is_inline = entity->function.is_inline;
1132 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1133 set_entity_visibility(irentity, visibility_external_visible);
1134 } else if (storage_class == STORAGE_CLASS_STATIC ||
1135 (is_inline && has_body)) {
1137 /* this entity was declared, but is defined nowhere */
1138 set_entity_peculiarity(irentity, peculiarity_description);
1140 set_entity_visibility(irentity, visibility_local);
1141 } else if (has_body) {
1142 set_entity_visibility(irentity, visibility_external_visible);
1144 set_entity_visibility(irentity, visibility_external_allocated);
1146 set_entity_allocation(irentity, allocation_static);
1148 /* We should check for file scope here, but as long as we compile C only
1149 this is not needed. */
1150 if (! firm_opt.freestanding) {
1151 /* check for a known runtime function */
1152 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1153 if (id != rts_idents[i])
1156 /* ignore those rts functions not necessary needed for current mode */
1157 if ((c_mode & rts_data[i].flags) == 0)
1159 assert(rts_entities[rts_data[i].id] == NULL);
1160 rts_entities[rts_data[i].id] = irentity;
1164 entitymap_insert(&entitymap, symbol, irentity);
1167 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1168 entity->function.entity = irentity;
1173 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1175 ir_mode *value_mode = get_irn_mode(value);
1177 if (value_mode == dest_mode || is_Bad(value))
1180 if (dest_mode == mode_b) {
1181 ir_node *zero = new_Const(get_mode_null(value_mode));
1182 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
1183 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1187 return new_d_Conv(dbgi, value, dest_mode);
1191 * Creates a Const node representing a constant.
1193 static ir_node *const_to_firm(const const_expression_t *cnst)
1195 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1196 type_t *type = skip_typeref(cnst->base.type);
1197 ir_mode *mode = get_ir_mode_storage(type);
1202 if (mode_is_float(mode)) {
1203 tv = new_tarval_from_double(cnst->v.float_value, mode);
1205 if (mode_is_signed(mode)) {
1206 len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1208 len = snprintf(buf, sizeof(buf), "%llu",
1209 (unsigned long long) cnst->v.int_value);
1211 tv = new_tarval_from_str(buf, len, mode);
1214 ir_node *res = new_d_Const(dbgi, tv);
1215 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1216 return create_conv(dbgi, res, mode_arith);
1220 * Creates a Const node representing a character constant.
1222 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1224 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1225 ir_mode *mode = get_ir_mode_arithmetic(cnst->base.type);
1227 long long int v = 0;
1228 for (size_t i = 0; i < cnst->v.character.size; ++i) {
1229 if (char_is_signed) {
1230 v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1232 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1236 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1237 tarval *tv = new_tarval_from_str(buf, len, mode);
1239 return new_d_Const(dbgi, tv);
1243 * Creates a Const node representing a wide character constant.
1245 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1247 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1248 ir_mode *mode = get_ir_mode_arithmetic(cnst->base.type);
1250 long long int v = cnst->v.wide_character.begin[0];
1253 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1254 tarval *tv = new_tarval_from_str(buf, len, mode);
1256 return new_d_Const(dbgi, tv);
1260 * Creates a SymConst for a given entity.
1262 * @param dbgi debug info
1263 * @param mode the (reference) mode for the SymConst
1264 * @param entity the entity
1266 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1269 assert(entity != NULL);
1270 union symconst_symbol sym;
1271 sym.entity_p = entity;
1272 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1276 * Creates a SymConst node representing a string constant.
1278 * @param src_pos the source position of the string constant
1279 * @param id_prefix a prefix for the name of the generated string constant
1280 * @param value the value of the string constant
1282 static ir_node *string_to_firm(const source_position_t *const src_pos,
1283 const char *const id_prefix,
1284 const string_t *const value)
1286 ir_type *const global_type = get_glob_type();
1287 dbg_info *const dbgi = get_dbg_info(src_pos);
1288 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1289 ir_type_const_char, dbgi);
1291 ident *const id = id_unique(id_prefix);
1292 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1293 set_entity_ld_ident(entity, id);
1294 set_entity_variability(entity, variability_constant);
1295 set_entity_allocation(entity, allocation_static);
1297 ir_type *const elem_type = ir_type_const_char;
1298 ir_mode *const mode = get_type_mode(elem_type);
1300 const char* const string = value->begin;
1301 const size_t slen = value->size;
1303 set_array_lower_bound_int(type, 0, 0);
1304 set_array_upper_bound_int(type, 0, slen);
1305 set_type_size_bytes(type, slen);
1306 set_type_state(type, layout_fixed);
1308 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1309 for (size_t i = 0; i < slen; ++i) {
1310 tvs[i] = new_tarval_from_long(string[i], mode);
1313 set_array_entity_values(entity, tvs, slen);
1316 return create_symconst(dbgi, mode_P_data, entity);
1320 * Creates a SymConst node representing a string literal.
1322 * @param literal the string literal
1324 static ir_node *string_literal_to_firm(
1325 const string_literal_expression_t* literal)
1327 return string_to_firm(&literal->base.source_position, "Lstr.%u",
1332 * Creates a SymConst node representing a wide string literal.
1334 * @param literal the wide string literal
1336 static ir_node *wide_string_literal_to_firm(
1337 const wide_string_literal_expression_t* const literal)
1339 ir_type *const global_type = get_glob_type();
1340 ir_type *const elem_type = ir_type_wchar_t;
1341 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1342 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1345 ident *const id = id_unique("Lstr.%u");
1346 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1347 set_entity_ld_ident(entity, id);
1348 set_entity_variability(entity, variability_constant);
1349 set_entity_allocation(entity, allocation_static);
1351 ir_mode *const mode = get_type_mode(elem_type);
1353 const wchar_rep_t *const string = literal->value.begin;
1354 const size_t slen = literal->value.size;
1356 set_array_lower_bound_int(type, 0, 0);
1357 set_array_upper_bound_int(type, 0, slen);
1358 set_type_size_bytes(type, slen);
1359 set_type_state(type, layout_fixed);
1361 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1362 for (size_t i = 0; i < slen; ++i) {
1363 tvs[i] = new_tarval_from_long(string[i], mode);
1366 set_array_entity_values(entity, tvs, slen);
1369 return create_symconst(dbgi, mode_P_data, entity);
1372 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1373 ir_node *const addr)
1375 ir_type *irtype = get_ir_type(type);
1376 if (is_compound_type(irtype)
1377 || is_Method_type(irtype)
1378 || is_Array_type(irtype)) {
1382 ir_mode *const mode = get_type_mode(irtype);
1383 ir_node *const memory = get_store();
1384 ir_node *const load = new_d_Load(dbgi, memory, addr, mode);
1385 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1386 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1388 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE && !is_Bad(load)) {
1389 set_Load_volatility(load, volatility_is_volatile);
1392 set_store(load_mem);
1394 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1395 return create_conv(dbgi, load_res, mode_arithmetic);
1399 * Creates a strict Conv if neccessary.
1401 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1403 ir_mode *mode = get_irn_mode(node);
1405 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1407 if (!mode_is_float(mode))
1410 /* check if there is already a Conv */
1411 if (is_Conv(node)) {
1412 /* convert it into a strict Conv */
1413 set_Conv_strict(node, 1);
1417 /* otherwise create a new one */
1418 return new_d_strictConv(dbgi, node, mode);
1421 static ir_node *get_global_var_address(dbg_info *const dbgi,
1422 const entity_t *const entity)
1424 assert(entity->kind == ENTITY_VARIABLE);
1425 assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1427 ir_entity *const irentity = entity->variable.v.entity;
1428 if (entity->variable.thread_local) {
1429 ir_node *const no_mem = new_NoMem();
1430 ir_node *const tls = get_irg_tls(current_ir_graph);
1431 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1433 return create_symconst(dbgi, mode_P_data, irentity);
1438 * Returns the correct base address depending on whether it is a parameter or a
1439 * normal local variable.
1441 static ir_node *get_local_frame(ir_entity *const ent)
1443 ir_graph *const irg = current_ir_graph;
1444 const ir_type *const owner = get_entity_owner(ent);
1445 if (owner == get_irg_frame_type(irg)) {
1446 return get_irg_frame(irg);
1448 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1449 return get_irg_value_param_base(irg);
1454 * Keep all memory edges of the given block.
1456 static void keep_all_memory(ir_node *block) {
1457 ir_node *old = get_cur_block();
1459 set_cur_block(block);
1460 keep_alive(get_store());
1461 /* TODO: keep all memory edges from restricted pointers */
1465 static ir_node *reference_expression_enum_value_to_firm(
1466 const reference_expression_t *ref)
1468 entity_t *entity = ref->entity;
1469 type_t *type = skip_typeref(entity->enum_value.enum_type);
1470 /* make sure the type is constructed */
1471 (void) get_ir_type(type);
1473 return new_Const(entity->enum_value.tv);
1476 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1478 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1479 entity_t *entity = ref->entity;
1480 assert(is_declaration(entity));
1481 type_t *type = skip_typeref(entity->declaration.type);
1483 /* make sure the type is constructed */
1484 (void) get_ir_type(type);
1486 switch ((declaration_kind_t) entity->declaration.kind) {
1487 case DECLARATION_KIND_UNKNOWN:
1490 case DECLARATION_KIND_LOCAL_VARIABLE: {
1491 ir_mode *const mode = get_ir_mode_storage(type);
1492 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1493 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1495 case DECLARATION_KIND_PARAMETER: {
1496 ir_mode *const mode = get_ir_mode_storage(type);
1497 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1498 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1500 case DECLARATION_KIND_FUNCTION: {
1501 ir_mode *const mode = get_ir_mode_storage(type);
1502 return create_symconst(dbgi, mode, entity->function.entity);
1504 case DECLARATION_KIND_INNER_FUNCTION: {
1505 ir_mode *const mode = get_ir_mode_storage(type);
1506 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1507 /* inner function not using the closure */
1508 return create_symconst(dbgi, mode, entity->function.entity);
1510 /* TODO: need trampoline here */
1511 panic("Trampoline code not implemented");
1512 return create_symconst(dbgi, mode, entity->function.entity);
1515 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1516 ir_node *const addr = get_global_var_address(dbgi, entity);
1517 return deref_address(dbgi, entity->declaration.type, addr);
1520 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1521 ir_entity *irentity = entity->variable.v.entity;
1522 ir_node *frame = get_local_frame(irentity);
1523 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1524 return deref_address(dbgi, entity->declaration.type, sel);
1526 case DECLARATION_KIND_PARAMETER_ENTITY: {
1527 ir_entity *irentity = entity->parameter.v.entity;
1528 ir_node *frame = get_local_frame(irentity);
1529 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1530 return deref_address(dbgi, entity->declaration.type, sel);
1533 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1534 return entity->variable.v.vla_base;
1536 case DECLARATION_KIND_COMPOUND_MEMBER:
1537 panic("not implemented reference type");
1540 panic("reference to declaration with unknown type found");
1543 static ir_node *reference_addr(const reference_expression_t *ref)
1545 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1546 entity_t *entity = ref->entity;
1547 assert(is_declaration(entity));
1549 switch((declaration_kind_t) entity->declaration.kind) {
1550 case DECLARATION_KIND_UNKNOWN:
1552 case DECLARATION_KIND_PARAMETER:
1553 case DECLARATION_KIND_LOCAL_VARIABLE:
1554 /* you can store to a local variable (so we don't panic but return NULL
1555 * as an indicator for no real address) */
1557 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1558 ir_node *const addr = get_global_var_address(dbgi, entity);
1561 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1562 ir_entity *irentity = entity->variable.v.entity;
1563 ir_node *frame = get_local_frame(irentity);
1564 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1568 case DECLARATION_KIND_PARAMETER_ENTITY: {
1569 ir_entity *irentity = entity->parameter.v.entity;
1570 ir_node *frame = get_local_frame(irentity);
1571 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1576 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1577 return entity->variable.v.vla_base;
1579 case DECLARATION_KIND_FUNCTION: {
1580 type_t *const type = skip_typeref(entity->declaration.type);
1581 ir_mode *const mode = get_ir_mode_storage(type);
1582 return create_symconst(dbgi, mode, entity->function.entity);
1585 case DECLARATION_KIND_INNER_FUNCTION:
1586 case DECLARATION_KIND_COMPOUND_MEMBER:
1587 panic("not implemented reference type");
1590 panic("reference to declaration with unknown type found");
1594 * Transform calls to builtin functions.
1596 static ir_node *process_builtin_call(const call_expression_t *call)
1598 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1600 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1601 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1603 type_t *type = skip_typeref(builtin->base.type);
1604 assert(is_type_pointer(type));
1606 type_t *function_type = skip_typeref(type->pointer.points_to);
1607 symbol_t *symbol = builtin->symbol;
1609 switch(symbol->ID) {
1610 case T___builtin_alloca: {
1611 if (call->arguments == NULL || call->arguments->next != NULL) {
1612 panic("invalid number of parameters on __builtin_alloca");
1614 expression_t *argument = call->arguments->expression;
1615 ir_node *size = expression_to_firm(argument);
1617 ir_node *store = get_store();
1618 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1620 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1622 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1627 case T___builtin_huge_val:
1628 case T___builtin_inf:
1629 case T___builtin_inff:
1630 case T___builtin_infl: {
1631 type_t *type = function_type->function.return_type;
1632 ir_mode *mode = get_ir_mode_arithmetic(type);
1633 tarval *tv = get_mode_infinite(mode);
1634 ir_node *res = new_d_Const(dbgi, tv);
1637 case T___builtin_nan:
1638 case T___builtin_nanf:
1639 case T___builtin_nanl: {
1640 /* Ignore string for now... */
1641 assert(is_type_function(function_type));
1642 type_t *type = function_type->function.return_type;
1643 ir_mode *mode = get_ir_mode_arithmetic(type);
1644 tarval *tv = get_mode_NAN(mode);
1645 ir_node *res = new_d_Const(dbgi, tv);
1648 case T___builtin_expect: {
1649 expression_t *argument = call->arguments->expression;
1650 return _expression_to_firm(argument);
1652 case T___builtin_va_end:
1653 /* evaluate the argument of va_end for its side effects */
1654 _expression_to_firm(call->arguments->expression);
1657 panic("unsupported builtin found");
1662 * Transform a call expression.
1663 * Handles some special cases, like alloca() calls, which must be resolved
1664 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1665 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1668 static ir_node *call_expression_to_firm(const call_expression_t *call)
1670 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1671 assert(get_cur_block() != NULL);
1673 expression_t *function = call->function;
1674 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1675 return process_builtin_call(call);
1677 if (function->kind == EXPR_REFERENCE) {
1678 const reference_expression_t *ref = &function->reference;
1679 entity_t *entity = ref->entity;
1681 if (entity->kind == ENTITY_FUNCTION
1682 && entity->function.entity == rts_entities[rts_alloca]) {
1683 /* handle alloca() call */
1684 expression_t *argument = call->arguments->expression;
1685 ir_node *size = expression_to_firm(argument);
1686 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
1688 size = create_conv(dbgi, size, mode);
1690 ir_node *store = get_store();
1691 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1692 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1694 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1696 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1701 ir_node *callee = expression_to_firm(function);
1703 type_t *type = skip_typeref(function->base.type);
1704 assert(is_type_pointer(type));
1705 pointer_type_t *pointer_type = &type->pointer;
1706 type_t *points_to = skip_typeref(pointer_type->points_to);
1707 assert(is_type_function(points_to));
1708 function_type_t *function_type = &points_to->function;
1710 int n_parameters = 0;
1711 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1712 ir_type *new_method_type = NULL;
1713 if (function_type->variadic || function_type->unspecified_parameters) {
1714 const call_argument_t *argument = call->arguments;
1715 for ( ; argument != NULL; argument = argument->next) {
1719 /* we need to construct a new method type matching the call
1721 int n_res = get_method_n_ress(ir_method_type);
1722 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1723 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1724 n_parameters, n_res, dbgi);
1725 set_method_calling_convention(new_method_type,
1726 get_method_calling_convention(ir_method_type));
1727 set_method_additional_properties(new_method_type,
1728 get_method_additional_properties(ir_method_type));
1729 set_method_variadicity(new_method_type,
1730 get_method_variadicity(ir_method_type));
1732 for (int i = 0; i < n_res; ++i) {
1733 set_method_res_type(new_method_type, i,
1734 get_method_res_type(ir_method_type, i));
1736 argument = call->arguments;
1737 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1738 expression_t *expression = argument->expression;
1739 ir_type *irtype = get_ir_type(expression->base.type);
1740 set_method_param_type(new_method_type, i, irtype);
1742 ir_method_type = new_method_type;
1744 n_parameters = get_method_n_params(ir_method_type);
1747 ir_node *in[n_parameters];
1749 const call_argument_t *argument = call->arguments;
1750 for (int n = 0; n < n_parameters; ++n) {
1751 expression_t *expression = argument->expression;
1752 ir_node *arg_node = expression_to_firm(expression);
1754 type_t *type = skip_typeref(expression->base.type);
1755 if (!is_type_compound(type)) {
1756 ir_mode *mode = get_ir_mode_storage(expression->base.type);
1757 arg_node = create_conv(dbgi, arg_node, mode);
1758 arg_node = do_strict_conv(dbgi, arg_node);
1763 argument = argument->next;
1766 ir_node *store = get_store();
1767 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1769 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1772 type_t *return_type = skip_typeref(function_type->return_type);
1773 ir_node *result = NULL;
1775 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1776 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1778 if (is_type_scalar(return_type)) {
1779 ir_mode *mode = get_ir_mode_storage(return_type);
1780 result = new_d_Proj(dbgi, resproj, mode, 0);
1781 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1782 result = create_conv(NULL, result, mode_arith);
1784 ir_mode *mode = mode_P_data;
1785 result = new_d_Proj(dbgi, resproj, mode, 0);
1789 if (function->kind == EXPR_REFERENCE &&
1790 function->reference.entity->declaration.modifiers & DM_NORETURN) {
1791 /* A dead end: Keep the Call and the Block. Also place all further
1792 * nodes into a new and unreachable block. */
1794 keep_alive(get_cur_block());
1801 static void statement_to_firm(statement_t *statement);
1802 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1804 static ir_node *expression_to_addr(const expression_t *expression);
1805 static ir_node *create_condition_evaluation(const expression_t *expression,
1806 ir_node *true_block,
1807 ir_node *false_block);
1809 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1812 if (!is_type_compound(type)) {
1813 ir_mode *mode = get_ir_mode_storage(type);
1814 value = create_conv(dbgi, value, mode);
1815 value = do_strict_conv(dbgi, value);
1818 ir_node *memory = get_store();
1820 if (is_type_scalar(type)) {
1821 ir_node *store = new_d_Store(dbgi, memory, addr, value);
1822 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1823 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE && !is_Bad(store))
1824 set_Store_volatility(store, volatility_is_volatile);
1825 set_store(store_mem);
1827 ir_type *irtype = get_ir_type(type);
1828 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1829 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1830 set_store(copyb_mem);
1834 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1836 tarval *all_one = get_mode_all_one(mode);
1837 int mode_size = get_mode_size_bits(mode);
1839 assert(offset >= 0);
1841 assert(offset + size <= mode_size);
1842 if (size == mode_size) {
1846 long shiftr = get_mode_size_bits(mode) - size;
1847 long shiftl = offset;
1848 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1849 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1850 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1851 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1856 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1857 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1859 ir_type *entity_type = get_entity_type(entity);
1860 ir_type *base_type = get_primitive_base_type(entity_type);
1861 assert(base_type != NULL);
1862 ir_mode *mode = get_type_mode(base_type);
1864 value = create_conv(dbgi, value, mode);
1866 /* kill upper bits of value and shift to right position */
1867 int bitoffset = get_entity_offset_bits_remainder(entity);
1868 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1870 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1871 ir_node *mask_node = new_d_Const(dbgi, mask);
1872 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1873 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1874 ir_node *shiftcount = new_d_Const(dbgi, shiftl);
1875 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1877 /* load current value */
1878 ir_node *mem = get_store();
1879 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1880 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1881 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1882 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1883 tarval *inv_mask = tarval_not(shift_mask);
1884 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1885 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1887 /* construct new value and store */
1888 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1889 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val);
1890 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1891 set_store(store_mem);
1895 set_Load_volatility(load, volatility_is_volatile);
1897 set_Store_volatility(store, volatility_is_volatile);
1900 return value_masked;
1903 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1906 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1907 type_t *type = expression->base.type;
1908 ir_mode *mode = get_ir_mode_storage(type);
1909 ir_node *mem = get_store();
1910 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1911 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1912 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1914 load_res = create_conv(dbgi, load_res, mode_int);
1916 set_store(load_mem);
1918 /* kill upper bits */
1919 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1920 ir_entity *entity = expression->compound_entry->compound_member.entity;
1921 int bitoffset = get_entity_offset_bits_remainder(entity);
1922 ir_type *entity_type = get_entity_type(entity);
1923 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1924 long shift_bitsl = machine_size - bitoffset - bitsize;
1925 assert(shift_bitsl >= 0);
1926 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1927 ir_node *countl = new_d_Const(dbgi, tvl);
1928 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1930 long shift_bitsr = bitoffset + shift_bitsl;
1931 assert(shift_bitsr <= (long) machine_size);
1932 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1933 ir_node *countr = new_d_Const(dbgi, tvr);
1935 if (mode_is_signed(mode)) {
1936 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1938 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1941 return create_conv(dbgi, shiftr, mode);
1944 /* make sure the selected compound type is constructed */
1945 static void construct_select_compound(const select_expression_t *expression)
1947 type_t *type = skip_typeref(expression->compound->base.type);
1948 if (is_type_pointer(type)) {
1949 type = type->pointer.points_to;
1951 (void) get_ir_type(type);
1954 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1955 ir_node *value, ir_node *addr)
1957 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1958 type_t *type = skip_typeref(expression->base.type);
1960 if (!is_type_compound(type)) {
1961 ir_mode *mode = get_ir_mode_storage(type);
1962 value = create_conv(dbgi, value, mode);
1963 value = do_strict_conv(dbgi, value);
1966 if (expression->kind == EXPR_REFERENCE) {
1967 const reference_expression_t *ref = &expression->reference;
1969 entity_t *entity = ref->entity;
1970 assert(is_declaration(entity));
1971 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1972 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1973 set_value(entity->variable.v.value_number, value);
1975 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1976 set_value(entity->parameter.v.value_number, value);
1982 addr = expression_to_addr(expression);
1983 assert(addr != NULL);
1985 if (expression->kind == EXPR_SELECT) {
1986 const select_expression_t *select = &expression->select;
1988 construct_select_compound(select);
1990 entity_t *entity = select->compound_entry;
1991 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1992 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1993 ir_entity *irentity = entity->compound_member.entity;
1995 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1996 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2002 assign_value(dbgi, addr, type, value);
2006 static void set_value_for_expression(const expression_t *expression,
2009 set_value_for_expression_addr(expression, value, NULL);
2012 static ir_node *get_value_from_lvalue(const expression_t *expression,
2015 if (expression->kind == EXPR_REFERENCE) {
2016 const reference_expression_t *ref = &expression->reference;
2018 entity_t *entity = ref->entity;
2019 assert(entity->kind == ENTITY_VARIABLE
2020 || entity->kind == ENTITY_PARAMETER);
2021 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2023 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2024 value_number = entity->variable.v.value_number;
2025 assert(addr == NULL);
2026 type_t *type = skip_typeref(expression->base.type);
2027 ir_mode *mode = get_ir_mode_storage(type);
2028 ir_node *res = get_value(value_number, mode);
2029 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2030 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2031 value_number = entity->parameter.v.value_number;
2032 assert(addr == NULL);
2033 type_t *type = skip_typeref(expression->base.type);
2034 ir_mode *mode = get_ir_mode_storage(type);
2035 ir_node *res = get_value(value_number, mode);
2036 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2040 assert(addr != NULL);
2041 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2044 if (expression->kind == EXPR_SELECT &&
2045 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2046 construct_select_compound(&expression->select);
2047 value = bitfield_extract_to_firm(&expression->select, addr);
2049 value = deref_address(dbgi, expression->base.type, addr);
2056 static ir_node *create_incdec(const unary_expression_t *expression)
2058 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2059 const expression_t *value_expr = expression->value;
2060 ir_node *addr = expression_to_addr(value_expr);
2061 ir_node *value = get_value_from_lvalue(value_expr, addr);
2063 type_t *type = skip_typeref(expression->base.type);
2064 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2067 if (is_type_pointer(type)) {
2068 pointer_type_t *pointer_type = &type->pointer;
2069 offset = get_type_size(pointer_type->points_to);
2071 assert(is_type_arithmetic(type));
2072 offset = new_Const(get_mode_one(mode));
2076 ir_node *store_value;
2077 switch(expression->base.kind) {
2078 case EXPR_UNARY_POSTFIX_INCREMENT:
2080 store_value = new_d_Add(dbgi, value, offset, mode);
2082 case EXPR_UNARY_POSTFIX_DECREMENT:
2084 store_value = new_d_Sub(dbgi, value, offset, mode);
2086 case EXPR_UNARY_PREFIX_INCREMENT:
2087 result = new_d_Add(dbgi, value, offset, mode);
2088 store_value = result;
2090 case EXPR_UNARY_PREFIX_DECREMENT:
2091 result = new_d_Sub(dbgi, value, offset, mode);
2092 store_value = result;
2095 panic("no incdec expr in create_incdec");
2098 set_value_for_expression_addr(value_expr, store_value, addr);
2103 static bool is_local_variable(expression_t *expression)
2105 if (expression->kind != EXPR_REFERENCE)
2107 reference_expression_t *ref_expr = &expression->reference;
2108 entity_t *entity = ref_expr->entity;
2109 if (entity->kind != ENTITY_VARIABLE)
2111 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2112 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2115 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2118 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2119 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2120 case EXPR_BINARY_NOTEQUAL:
2121 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2122 case EXPR_BINARY_ISLESS:
2123 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2124 case EXPR_BINARY_ISLESSEQUAL:
2125 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2126 case EXPR_BINARY_ISGREATER:
2127 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2128 case EXPR_BINARY_ISGREATEREQUAL:
2129 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2130 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2135 panic("trying to get pn_Cmp from non-comparison binexpr type");
2139 * Handle the assume optimizer hint: check if a Confirm
2140 * node can be created.
2142 * @param dbi debug info
2143 * @param expr the IL assume expression
2145 * we support here only some simple cases:
2150 static ir_node *handle_assume_compare(dbg_info *dbi,
2151 const binary_expression_t *expression)
2153 expression_t *op1 = expression->left;
2154 expression_t *op2 = expression->right;
2155 entity_t *var2, *var = NULL;
2156 ir_node *res = NULL;
2159 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2161 if (is_local_variable(op1) && is_local_variable(op2)) {
2162 var = op1->reference.entity;
2163 var2 = op2->reference.entity;
2165 type_t *const type = skip_typeref(var->declaration.type);
2166 ir_mode *const mode = get_ir_mode_storage(type);
2168 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2169 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2171 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2172 set_value(var2->variable.v.value_number, res);
2174 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2175 set_value(var->variable.v.value_number, res);
2181 if (is_local_variable(op1) && is_constant_expression(op2)) {
2182 var = op1->reference.entity;
2184 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2185 cmp_val = get_inversed_pnc(cmp_val);
2186 var = op2->reference.entity;
2191 type_t *const type = skip_typeref(var->declaration.type);
2192 ir_mode *const mode = get_ir_mode_storage(type);
2194 res = get_value(var->variable.v.value_number, mode);
2195 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2196 set_value(var->variable.v.value_number, res);
2202 * Handle the assume optimizer hint.
2204 * @param dbi debug info
2205 * @param expr the IL assume expression
2207 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2208 switch(expression->kind) {
2209 case EXPR_BINARY_EQUAL:
2210 case EXPR_BINARY_NOTEQUAL:
2211 case EXPR_BINARY_LESS:
2212 case EXPR_BINARY_LESSEQUAL:
2213 case EXPR_BINARY_GREATER:
2214 case EXPR_BINARY_GREATEREQUAL:
2215 return handle_assume_compare(dbi, &expression->binary);
2221 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2223 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2224 type_t *type = skip_typeref(expression->base.type);
2226 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2227 return expression_to_addr(expression->value);
2229 const expression_t *value = expression->value;
2231 switch(expression->base.kind) {
2232 case EXPR_UNARY_NEGATE: {
2233 ir_node *value_node = expression_to_firm(value);
2234 ir_mode *mode = get_ir_mode_arithmetic(type);
2235 return new_d_Minus(dbgi, value_node, mode);
2237 case EXPR_UNARY_PLUS:
2238 return expression_to_firm(value);
2239 case EXPR_UNARY_BITWISE_NEGATE: {
2240 ir_node *value_node = expression_to_firm(value);
2241 ir_mode *mode = get_ir_mode_arithmetic(type);
2242 return new_d_Not(dbgi, value_node, mode);
2244 case EXPR_UNARY_NOT: {
2245 ir_node *value_node = _expression_to_firm(value);
2246 value_node = create_conv(dbgi, value_node, mode_b);
2247 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2250 case EXPR_UNARY_DEREFERENCE: {
2251 ir_node *value_node = expression_to_firm(value);
2252 type_t *value_type = skip_typeref(value->base.type);
2253 assert(is_type_pointer(value_type));
2254 type_t *points_to = value_type->pointer.points_to;
2255 return deref_address(dbgi, points_to, value_node);
2257 case EXPR_UNARY_POSTFIX_INCREMENT:
2258 case EXPR_UNARY_POSTFIX_DECREMENT:
2259 case EXPR_UNARY_PREFIX_INCREMENT:
2260 case EXPR_UNARY_PREFIX_DECREMENT:
2261 return create_incdec(expression);
2262 case EXPR_UNARY_CAST: {
2263 ir_node *value_node = expression_to_firm(value);
2264 if (is_type_scalar(type)) {
2265 ir_mode *mode = get_ir_mode_storage(type);
2266 ir_node *node = create_conv(dbgi, value_node, mode);
2267 node = do_strict_conv(dbgi, node);
2268 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2269 node = create_conv(dbgi, node, mode_arith);
2272 /* make sure firm type is constructed */
2273 (void) get_ir_type(type);
2277 case EXPR_UNARY_CAST_IMPLICIT: {
2278 ir_node *value_node = expression_to_firm(value);
2279 if (is_type_scalar(type)) {
2280 ir_mode *mode = get_ir_mode_storage(type);
2281 ir_node *res = create_conv(dbgi, value_node, mode);
2282 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2283 res = create_conv(dbgi, res, mode_arith);
2289 case EXPR_UNARY_ASSUME:
2290 if (firm_opt.confirm)
2291 return handle_assume(dbgi, value);
2298 panic("invalid UNEXPR type found");
2302 * produces a 0/1 depending of the value of a mode_b node
2304 static ir_node *produce_condition_result(const expression_t *expression,
2305 ir_mode *mode, dbg_info *dbgi)
2307 ir_node *cur_block = get_cur_block();
2309 ir_node *one_block = new_immBlock();
2310 set_cur_block(one_block);
2311 ir_node *one = new_Const(get_mode_one(mode));
2312 ir_node *jmp_one = new_d_Jmp(dbgi);
2314 ir_node *zero_block = new_immBlock();
2315 set_cur_block(zero_block);
2316 ir_node *zero = new_Const(get_mode_null(mode));
2317 ir_node *jmp_zero = new_d_Jmp(dbgi);
2319 set_cur_block(cur_block);
2320 create_condition_evaluation(expression, one_block, zero_block);
2321 mature_immBlock(one_block);
2322 mature_immBlock(zero_block);
2324 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2325 new_Block(2, in_cf);
2327 ir_node *in[2] = { one, zero };
2328 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2333 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2334 ir_node *value, type_t *type)
2336 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2337 assert(is_type_pointer(type));
2338 pointer_type_t *const pointer_type = &type->pointer;
2339 type_t *const points_to = skip_typeref(pointer_type->points_to);
2340 unsigned elem_size = get_type_size_const(points_to);
2342 value = create_conv(dbgi, value, mode);
2344 /* gcc extension: allow arithmetic with void * and function * */
2345 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2346 is_type_function(points_to)) {
2350 assert(elem_size >= 1);
2354 ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2355 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode);
2359 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2360 ir_node *left, ir_node *right)
2363 type_t *type_left = skip_typeref(expression->left->base.type);
2364 type_t *type_right = skip_typeref(expression->right->base.type);
2366 expression_kind_t kind = expression->base.kind;
2369 case EXPR_BINARY_SHIFTLEFT:
2370 case EXPR_BINARY_SHIFTRIGHT:
2371 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2372 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2373 mode = get_irn_mode(left);
2374 right = create_conv(dbgi, right, mode_uint);
2377 case EXPR_BINARY_SUB:
2378 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2379 const pointer_type_t *const ptr_type = &type_left->pointer;
2381 mode = get_ir_mode_arithmetic(expression->base.type);
2382 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2383 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2384 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2385 ir_node *const no_mem = new_NoMem();
2386 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2387 mode, op_pin_state_floats);
2388 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2391 case EXPR_BINARY_SUB_ASSIGN:
2392 if (is_type_pointer(type_left)) {
2393 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2394 mode = get_ir_mode_arithmetic(type_left);
2399 case EXPR_BINARY_ADD:
2400 case EXPR_BINARY_ADD_ASSIGN:
2401 if (is_type_pointer(type_left)) {
2402 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2403 mode = get_ir_mode_arithmetic(type_left);
2405 } else if (is_type_pointer(type_right)) {
2406 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2407 mode = get_ir_mode_arithmetic(type_right);
2414 mode = get_ir_mode_arithmetic(type_right);
2415 left = create_conv(dbgi, left, mode);
2420 case EXPR_BINARY_ADD_ASSIGN:
2421 case EXPR_BINARY_ADD:
2422 return new_d_Add(dbgi, left, right, mode);
2423 case EXPR_BINARY_SUB_ASSIGN:
2424 case EXPR_BINARY_SUB:
2425 return new_d_Sub(dbgi, left, right, mode);
2426 case EXPR_BINARY_MUL_ASSIGN:
2427 case EXPR_BINARY_MUL:
2428 return new_d_Mul(dbgi, left, right, mode);
2429 case EXPR_BINARY_BITWISE_AND:
2430 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2431 return new_d_And(dbgi, left, right, mode);
2432 case EXPR_BINARY_BITWISE_OR:
2433 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2434 return new_d_Or(dbgi, left, right, mode);
2435 case EXPR_BINARY_BITWISE_XOR:
2436 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2437 return new_d_Eor(dbgi, left, right, mode);
2438 case EXPR_BINARY_SHIFTLEFT:
2439 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2440 return new_d_Shl(dbgi, left, right, mode);
2441 case EXPR_BINARY_SHIFTRIGHT:
2442 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2443 if (mode_is_signed(mode)) {
2444 return new_d_Shrs(dbgi, left, right, mode);
2446 return new_d_Shr(dbgi, left, right, mode);
2448 case EXPR_BINARY_DIV:
2449 case EXPR_BINARY_DIV_ASSIGN: {
2450 ir_node *pin = new_Pin(new_NoMem());
2453 if (mode_is_float(mode)) {
2454 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2455 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2457 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2458 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2462 case EXPR_BINARY_MOD:
2463 case EXPR_BINARY_MOD_ASSIGN: {
2464 ir_node *pin = new_Pin(new_NoMem());
2465 assert(!mode_is_float(mode));
2466 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2467 op_pin_state_floats);
2468 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2472 panic("unexpected expression kind");
2476 static ir_node *create_lazy_op(const binary_expression_t *expression)
2478 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2479 type_t *type = skip_typeref(expression->base.type);
2480 ir_mode *mode = get_ir_mode_arithmetic(type);
2482 if (is_constant_expression(expression->left)) {
2483 long val = fold_constant(expression->left);
2484 expression_kind_t ekind = expression->base.kind;
2485 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2486 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2488 return new_Const(get_mode_null(mode));
2492 return new_Const(get_mode_one(mode));
2496 if (is_constant_expression(expression->right)) {
2497 long const valr = fold_constant(expression->right);
2499 new_Const(get_mode_one(mode)) :
2500 new_Const(get_mode_null(mode));
2503 return produce_condition_result(expression->right, mode, dbgi);
2506 return produce_condition_result((const expression_t*) expression, mode,
2510 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2511 ir_node *right, ir_mode *mode);
2513 static ir_node *create_assign_binop(const binary_expression_t *expression)
2515 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2516 const expression_t *left_expr = expression->left;
2517 type_t *type = skip_typeref(left_expr->base.type);
2518 ir_mode *left_mode = get_ir_mode_storage(type);
2519 ir_node *right = expression_to_firm(expression->right);
2520 ir_node *left_addr = expression_to_addr(left_expr);
2521 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2522 ir_node *result = create_op(dbgi, expression, left, right);
2524 result = create_conv(dbgi, result, left_mode);
2525 result = do_strict_conv(dbgi, result);
2527 result = set_value_for_expression_addr(left_expr, result, left_addr);
2529 if (!is_type_compound(type)) {
2530 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2531 result = create_conv(dbgi, result, mode_arithmetic);
2536 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2538 expression_kind_t kind = expression->base.kind;
2541 case EXPR_BINARY_EQUAL:
2542 case EXPR_BINARY_NOTEQUAL:
2543 case EXPR_BINARY_LESS:
2544 case EXPR_BINARY_LESSEQUAL:
2545 case EXPR_BINARY_GREATER:
2546 case EXPR_BINARY_GREATEREQUAL:
2547 case EXPR_BINARY_ISGREATER:
2548 case EXPR_BINARY_ISGREATEREQUAL:
2549 case EXPR_BINARY_ISLESS:
2550 case EXPR_BINARY_ISLESSEQUAL:
2551 case EXPR_BINARY_ISLESSGREATER:
2552 case EXPR_BINARY_ISUNORDERED: {
2553 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2554 ir_node *left = expression_to_firm(expression->left);
2555 ir_node *right = expression_to_firm(expression->right);
2556 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2557 long pnc = get_pnc(kind, expression->left->base.type);
2558 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2561 case EXPR_BINARY_ASSIGN: {
2562 ir_node *addr = expression_to_addr(expression->left);
2563 ir_node *right = expression_to_firm(expression->right);
2565 = set_value_for_expression_addr(expression->left, right, addr);
2567 type_t *type = skip_typeref(expression->base.type);
2568 if (!is_type_compound(type)) {
2569 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2570 res = create_conv(NULL, res, mode_arithmetic);
2574 case EXPR_BINARY_ADD:
2575 case EXPR_BINARY_SUB:
2576 case EXPR_BINARY_MUL:
2577 case EXPR_BINARY_DIV:
2578 case EXPR_BINARY_MOD:
2579 case EXPR_BINARY_BITWISE_AND:
2580 case EXPR_BINARY_BITWISE_OR:
2581 case EXPR_BINARY_BITWISE_XOR:
2582 case EXPR_BINARY_SHIFTLEFT:
2583 case EXPR_BINARY_SHIFTRIGHT:
2585 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2586 ir_node *left = expression_to_firm(expression->left);
2587 ir_node *right = expression_to_firm(expression->right);
2588 return create_op(dbgi, expression, left, right);
2590 case EXPR_BINARY_LOGICAL_AND:
2591 case EXPR_BINARY_LOGICAL_OR:
2592 return create_lazy_op(expression);
2593 case EXPR_BINARY_COMMA:
2594 /* create side effects of left side */
2595 (void) expression_to_firm(expression->left);
2596 return _expression_to_firm(expression->right);
2598 case EXPR_BINARY_ADD_ASSIGN:
2599 case EXPR_BINARY_SUB_ASSIGN:
2600 case EXPR_BINARY_MUL_ASSIGN:
2601 case EXPR_BINARY_MOD_ASSIGN:
2602 case EXPR_BINARY_DIV_ASSIGN:
2603 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2604 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2605 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2606 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2607 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2608 return create_assign_binop(expression);
2610 panic("TODO binexpr type");
2614 static ir_node *array_access_addr(const array_access_expression_t *expression)
2616 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2617 ir_node *base_addr = expression_to_firm(expression->array_ref);
2618 ir_node *offset = expression_to_firm(expression->index);
2619 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2620 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2621 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2626 static ir_node *array_access_to_firm(
2627 const array_access_expression_t *expression)
2629 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2630 ir_node *addr = array_access_addr(expression);
2631 type_t *type = revert_automatic_type_conversion(
2632 (const expression_t*) expression);
2633 type = skip_typeref(type);
2635 return deref_address(dbgi, type, addr);
2638 static long get_offsetof_offset(const offsetof_expression_t *expression)
2640 type_t *orig_type = expression->type;
2643 designator_t *designator = expression->designator;
2644 for ( ; designator != NULL; designator = designator->next) {
2645 type_t *type = skip_typeref(orig_type);
2646 /* be sure the type is constructed */
2647 (void) get_ir_type(type);
2649 if (designator->symbol != NULL) {
2650 assert(is_type_compound(type));
2651 symbol_t *symbol = designator->symbol;
2653 compound_t *compound = type->compound.compound;
2654 entity_t *iter = compound->members.entities;
2655 for ( ; iter != NULL; iter = iter->base.next) {
2656 if (iter->base.symbol == symbol) {
2660 assert(iter != NULL);
2662 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2663 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2664 offset += get_entity_offset(iter->compound_member.entity);
2666 orig_type = iter->declaration.type;
2668 expression_t *array_index = designator->array_index;
2669 assert(designator->array_index != NULL);
2670 assert(is_type_array(type));
2672 long index = fold_constant(array_index);
2673 ir_type *arr_type = get_ir_type(type);
2674 ir_type *elem_type = get_array_element_type(arr_type);
2675 long elem_size = get_type_size_bytes(elem_type);
2677 offset += index * elem_size;
2679 orig_type = type->array.element_type;
2686 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2688 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2689 long offset = get_offsetof_offset(expression);
2690 tarval *tv = new_tarval_from_long(offset, mode);
2691 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2693 return new_d_Const(dbgi, tv);
2696 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2697 ir_entity *entity, type_t *type);
2699 static ir_node *compound_literal_to_firm(
2700 const compound_literal_expression_t *expression)
2702 type_t *type = expression->type;
2704 /* create an entity on the stack */
2705 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2707 ident *const id = id_unique("CompLit.%u");
2708 ir_type *const irtype = get_ir_type(type);
2709 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2710 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2711 set_entity_ld_ident(entity, id);
2713 set_entity_variability(entity, variability_uninitialized);
2715 /* create initialisation code */
2716 initializer_t *initializer = expression->initializer;
2717 create_local_initializer(initializer, dbgi, entity, type);
2719 /* create a sel for the compound literal address */
2720 ir_node *frame = get_local_frame(entity);
2721 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2726 * Transform a sizeof expression into Firm code.
2728 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2730 type_t *type = expression->type;
2732 type = expression->tp_expression->base.type;
2733 assert(type != NULL);
2736 type = skip_typeref(type);
2737 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2738 if (is_type_array(type) && type->array.is_vla
2739 && expression->tp_expression != NULL) {
2740 expression_to_firm(expression->tp_expression);
2743 return get_type_size(type);
2747 * Transform an alignof expression into Firm code.
2749 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2751 type_t *type = expression->type;
2753 /* beware: if expression is a variable reference, return the
2754 alignment of the variable. */
2755 const expression_t *tp_expression = expression->tp_expression;
2756 const entity_t *entity = expression_is_variable(tp_expression);
2757 if (entity != NULL) {
2758 /* TODO: get the alignment of this variable. */
2761 type = tp_expression->base.type;
2762 assert(type != NULL);
2765 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2766 symconst_symbol sym;
2767 sym.type_p = get_ir_type(type);
2768 return new_SymConst(mode, sym, symconst_type_align);
2771 static void init_ir_types(void);
2773 long fold_constant(const expression_t *expression)
2775 assert(is_type_valid(skip_typeref(expression->base.type)));
2777 bool constant_folding_old = constant_folding;
2778 constant_folding = true;
2782 assert(is_constant_expression(expression));
2784 ir_graph *old_current_ir_graph = current_ir_graph;
2785 if (current_ir_graph == NULL) {
2786 current_ir_graph = get_const_code_irg();
2789 ir_node *cnst = expression_to_firm(expression);
2790 current_ir_graph = old_current_ir_graph;
2792 if (!is_Const(cnst)) {
2793 panic("couldn't fold constant");
2796 tarval *tv = get_Const_tarval(cnst);
2797 if (!tarval_is_long(tv)) {
2798 panic("result of constant folding is not integer");
2801 constant_folding = constant_folding_old;
2803 return get_tarval_long(tv);
2806 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2808 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2810 /* first try to fold a constant condition */
2811 if (is_constant_expression(expression->condition)) {
2812 long val = fold_constant(expression->condition);
2814 expression_t *true_expression = expression->true_expression;
2815 if (true_expression == NULL)
2816 true_expression = expression->condition;
2817 return expression_to_firm(true_expression);
2819 return expression_to_firm(expression->false_expression);
2823 ir_node *cur_block = get_cur_block();
2825 /* create the true block */
2826 ir_node *true_block = new_immBlock();
2827 set_cur_block(true_block);
2829 ir_node *true_val = expression->true_expression != NULL ?
2830 expression_to_firm(expression->true_expression) : NULL;
2831 ir_node *true_jmp = new_Jmp();
2833 /* create the false block */
2834 ir_node *false_block = new_immBlock();
2835 set_cur_block(false_block);
2837 ir_node *false_val = expression_to_firm(expression->false_expression);
2838 ir_node *false_jmp = new_Jmp();
2840 /* create the condition evaluation */
2841 set_cur_block(cur_block);
2842 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2843 if (expression->true_expression == NULL) {
2844 if (cond_expr != NULL) {
2845 true_val = cond_expr;
2847 /* Condition ended with a short circuit (&&, ||, !) operation.
2848 * Generate a "1" as value for the true branch. */
2849 true_val = new_Const(get_mode_one(mode_Is));
2852 mature_immBlock(true_block);
2853 mature_immBlock(false_block);
2855 /* create the common block */
2856 ir_node *in_cf[2] = { true_jmp, false_jmp };
2857 new_Block(2, in_cf);
2859 /* TODO improve static semantics, so either both or no values are NULL */
2860 if (true_val == NULL || false_val == NULL)
2863 ir_node *in[2] = { true_val, false_val };
2864 ir_mode *mode = get_irn_mode(true_val);
2865 assert(get_irn_mode(false_val) == mode);
2866 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2872 * Returns an IR-node representing the address of a field.
2874 static ir_node *select_addr(const select_expression_t *expression)
2876 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2878 construct_select_compound(expression);
2880 ir_node *compound_addr = expression_to_firm(expression->compound);
2882 entity_t *entry = expression->compound_entry;
2883 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2884 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2886 if (constant_folding) {
2887 ir_mode *mode = get_irn_mode(compound_addr);
2888 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2889 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2890 return new_d_Add(dbgi, compound_addr, ofs, mode);
2892 ir_entity *irentity = entry->compound_member.entity;
2893 assert(irentity != NULL);
2894 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2898 static ir_node *select_to_firm(const select_expression_t *expression)
2900 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2901 ir_node *addr = select_addr(expression);
2902 type_t *type = revert_automatic_type_conversion(
2903 (const expression_t*) expression);
2904 type = skip_typeref(type);
2906 entity_t *entry = expression->compound_entry;
2907 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2908 type_t *entry_type = skip_typeref(entry->declaration.type);
2910 if (entry_type->kind == TYPE_BITFIELD) {
2911 return bitfield_extract_to_firm(expression, addr);
2914 return deref_address(dbgi, type, addr);
2917 /* Values returned by __builtin_classify_type. */
2918 typedef enum gcc_type_class
2924 enumeral_type_class,
2927 reference_type_class,
2931 function_type_class,
2942 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2944 type_t *type = expr->type_expression->base.type;
2946 /* FIXME gcc returns different values depending on whether compiling C or C++
2947 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2950 type = skip_typeref(type);
2951 switch (type->kind) {
2953 const atomic_type_t *const atomic_type = &type->atomic;
2954 switch (atomic_type->akind) {
2955 /* should not be reached */
2956 case ATOMIC_TYPE_INVALID:
2960 /* gcc cannot do that */
2961 case ATOMIC_TYPE_VOID:
2962 tc = void_type_class;
2965 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2966 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2967 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2968 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2969 case ATOMIC_TYPE_SHORT:
2970 case ATOMIC_TYPE_USHORT:
2971 case ATOMIC_TYPE_INT:
2972 case ATOMIC_TYPE_UINT:
2973 case ATOMIC_TYPE_LONG:
2974 case ATOMIC_TYPE_ULONG:
2975 case ATOMIC_TYPE_LONGLONG:
2976 case ATOMIC_TYPE_ULONGLONG:
2977 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2978 tc = integer_type_class;
2981 case ATOMIC_TYPE_FLOAT:
2982 case ATOMIC_TYPE_DOUBLE:
2983 case ATOMIC_TYPE_LONG_DOUBLE:
2984 tc = real_type_class;
2987 panic("Unexpected atomic type in classify_type_to_firm().");
2990 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
2991 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
2992 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
2993 case TYPE_ARRAY: /* gcc handles this as pointer */
2994 case TYPE_FUNCTION: /* gcc handles this as pointer */
2995 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
2996 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
2997 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
2999 /* gcc handles this as integer */
3000 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3002 /* gcc classifies the referenced type */
3003 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3006 /* typedef/typeof should be skipped already */
3013 panic("unexpected TYPE classify_type_to_firm().");
3017 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3018 tarval *const tv = new_tarval_from_long(tc, mode_int);
3019 return new_d_Const(dbgi, tv);
3022 static ir_node *function_name_to_firm(
3023 const funcname_expression_t *const expr)
3025 switch(expr->kind) {
3026 case FUNCNAME_FUNCTION:
3027 case FUNCNAME_PRETTY_FUNCTION:
3028 case FUNCNAME_FUNCDNAME:
3029 if (current_function_name == NULL) {
3030 const source_position_t *const src_pos = &expr->base.source_position;
3031 const char *name = current_function_entity->base.symbol->string;
3032 const string_t string = { name, strlen(name) + 1 };
3033 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3035 return current_function_name;
3036 case FUNCNAME_FUNCSIG:
3037 if (current_funcsig == NULL) {
3038 const source_position_t *const src_pos = &expr->base.source_position;
3039 ir_entity *ent = get_irg_entity(current_ir_graph);
3040 const char *const name = get_entity_ld_name(ent);
3041 const string_t string = { name, strlen(name) + 1 };
3042 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3044 return current_funcsig;
3046 panic("Unsupported function name");
3049 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3051 statement_t *statement = expr->statement;
3053 assert(statement->kind == STATEMENT_COMPOUND);
3054 return compound_statement_to_firm(&statement->compound);
3057 static ir_node *va_start_expression_to_firm(
3058 const va_start_expression_t *const expr)
3060 type_t *const type = current_function_entity->declaration.type;
3061 ir_type *const method_type = get_ir_type(type);
3062 int const n = get_method_n_params(method_type) - 1;
3063 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
3064 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
3065 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3066 ir_node *const no_mem = new_NoMem();
3067 ir_node *const arg_sel =
3068 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3070 ir_node *const cnst = get_type_size(expr->parameter->base.type);
3071 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3072 set_value_for_expression(expr->ap, add);
3077 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3079 type_t *const type = expr->base.type;
3080 expression_t *const ap_expr = expr->ap;
3081 ir_node *const ap_addr = expression_to_addr(ap_expr);
3082 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3083 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3084 ir_node *const res = deref_address(dbgi, type, ap);
3086 ir_node *const cnst = get_type_size(expr->base.type);
3087 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
3089 set_value_for_expression_addr(ap_expr, add, ap_addr);
3094 static ir_node *dereference_addr(const unary_expression_t *const expression)
3096 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3097 return expression_to_firm(expression->value);
3101 * Returns a IR-node representing an lvalue of the given expression.
3103 static ir_node *expression_to_addr(const expression_t *expression)
3105 switch(expression->kind) {
3106 case EXPR_ARRAY_ACCESS:
3107 return array_access_addr(&expression->array_access);
3109 return call_expression_to_firm(&expression->call);
3110 case EXPR_COMPOUND_LITERAL:
3111 return compound_literal_to_firm(&expression->compound_literal);
3112 case EXPR_REFERENCE:
3113 return reference_addr(&expression->reference);
3115 return select_addr(&expression->select);
3116 case EXPR_UNARY_DEREFERENCE:
3117 return dereference_addr(&expression->unary);
3121 panic("trying to get address of non-lvalue");
3124 static ir_node *builtin_constant_to_firm(
3125 const builtin_constant_expression_t *expression)
3127 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3130 if (is_constant_expression(expression->value)) {
3135 return new_Const_long(mode, v);
3138 static ir_node *builtin_prefetch_to_firm(
3139 const builtin_prefetch_expression_t *expression)
3141 ir_node *adr = expression_to_firm(expression->adr);
3142 /* no Firm support for prefetch yet */
3147 static ir_node *get_label_block(label_t *label)
3149 if (label->block != NULL)
3150 return label->block;
3152 /* beware: might be called from create initializer with current_ir_graph
3153 * set to const_code_irg. */
3154 ir_graph *rem = current_ir_graph;
3155 current_ir_graph = current_function;
3157 ir_node *block = new_immBlock();
3159 label->block = block;
3161 ARR_APP1(label_t *, all_labels, label);
3163 current_ir_graph = rem;
3168 * Pointer to a label. This is used for the
3169 * GNU address-of-label extension.
3171 static ir_node *label_address_to_firm(
3172 const label_address_expression_t *label)
3174 ir_node *block = get_label_block(label->label);
3175 ir_label_t nr = get_Block_label(block);
3178 nr = get_irp_next_label_nr();
3179 set_Block_label(block, nr);
3181 symconst_symbol value;
3183 return new_SymConst(mode_P_code, value, symconst_label);
3186 static ir_node *builtin_symbol_to_firm(
3187 const builtin_symbol_expression_t *expression)
3189 /* for gcc compatibility we have to produce (dummy) addresses for some
3191 if (warning.other) {
3192 warningf(&expression->base.source_position,
3193 "taking address of builtin '%Y'", expression->symbol);
3196 /* simply create a NULL pointer */
3197 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
3198 ir_node *res = new_Const_long(mode, 0);
3204 * creates firm nodes for an expression. The difference between this function
3205 * and expression_to_firm is, that this version might produce mode_b nodes
3206 * instead of mode_Is.
3208 static ir_node *_expression_to_firm(const expression_t *expression)
3211 if (!constant_folding) {
3212 assert(!expression->base.transformed);
3213 ((expression_t*) expression)->base.transformed = true;
3217 switch (expression->kind) {
3218 case EXPR_CHARACTER_CONSTANT:
3219 return character_constant_to_firm(&expression->conste);
3220 case EXPR_WIDE_CHARACTER_CONSTANT:
3221 return wide_character_constant_to_firm(&expression->conste);
3223 return const_to_firm(&expression->conste);
3224 case EXPR_STRING_LITERAL:
3225 return string_literal_to_firm(&expression->string);
3226 case EXPR_WIDE_STRING_LITERAL:
3227 return wide_string_literal_to_firm(&expression->wide_string);
3228 case EXPR_REFERENCE:
3229 return reference_expression_to_firm(&expression->reference);
3230 case EXPR_REFERENCE_ENUM_VALUE:
3231 return reference_expression_enum_value_to_firm(&expression->reference);
3233 return call_expression_to_firm(&expression->call);
3235 return unary_expression_to_firm(&expression->unary);
3237 return binary_expression_to_firm(&expression->binary);
3238 case EXPR_ARRAY_ACCESS:
3239 return array_access_to_firm(&expression->array_access);
3241 return sizeof_to_firm(&expression->typeprop);
3243 return alignof_to_firm(&expression->typeprop);
3244 case EXPR_CONDITIONAL:
3245 return conditional_to_firm(&expression->conditional);
3247 return select_to_firm(&expression->select);
3248 case EXPR_CLASSIFY_TYPE:
3249 return classify_type_to_firm(&expression->classify_type);
3251 return function_name_to_firm(&expression->funcname);
3252 case EXPR_STATEMENT:
3253 return statement_expression_to_firm(&expression->statement);
3255 return va_start_expression_to_firm(&expression->va_starte);
3257 return va_arg_expression_to_firm(&expression->va_arge);
3258 case EXPR_BUILTIN_SYMBOL:
3259 return builtin_symbol_to_firm(&expression->builtin_symbol);
3260 case EXPR_BUILTIN_CONSTANT_P:
3261 return builtin_constant_to_firm(&expression->builtin_constant);
3262 case EXPR_BUILTIN_PREFETCH:
3263 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3265 return offsetof_to_firm(&expression->offsetofe);
3266 case EXPR_COMPOUND_LITERAL:
3267 return compound_literal_to_firm(&expression->compound_literal);
3268 case EXPR_LABEL_ADDRESS:
3269 return label_address_to_firm(&expression->label_address);
3275 panic("invalid expression found");
3278 static bool is_builtin_expect(const expression_t *expression)
3280 if (expression->kind != EXPR_CALL)
3283 expression_t *function = expression->call.function;
3284 if (function->kind != EXPR_BUILTIN_SYMBOL)
3286 if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3292 static bool produces_mode_b(const expression_t *expression)
3294 switch (expression->kind) {
3295 case EXPR_BINARY_EQUAL:
3296 case EXPR_BINARY_NOTEQUAL:
3297 case EXPR_BINARY_LESS:
3298 case EXPR_BINARY_LESSEQUAL:
3299 case EXPR_BINARY_GREATER:
3300 case EXPR_BINARY_GREATEREQUAL:
3301 case EXPR_BINARY_ISGREATER:
3302 case EXPR_BINARY_ISGREATEREQUAL:
3303 case EXPR_BINARY_ISLESS:
3304 case EXPR_BINARY_ISLESSEQUAL:
3305 case EXPR_BINARY_ISLESSGREATER:
3306 case EXPR_BINARY_ISUNORDERED:
3307 case EXPR_UNARY_NOT:
3311 if (is_builtin_expect(expression)) {
3312 expression_t *argument = expression->call.arguments->expression;
3313 return produces_mode_b(argument);
3316 case EXPR_BINARY_COMMA:
3317 return produces_mode_b(expression->binary.right);
3324 static ir_node *expression_to_firm(const expression_t *expression)
3326 if (!produces_mode_b(expression)) {
3327 ir_node *res = _expression_to_firm(expression);
3328 assert(res == NULL || get_irn_mode(res) != mode_b);
3332 if (is_constant_expression(expression)) {
3333 ir_node *res = _expression_to_firm(expression);
3334 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3335 assert(is_Const(res));
3336 if (is_Const_null(res)) {
3337 return new_Const_long(mode, 0);
3339 return new_Const_long(mode, 1);
3343 /* we have to produce a 0/1 from the mode_b expression */
3344 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3345 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3346 return produce_condition_result(expression, mode, dbgi);
3350 * create a short-circuit expression evaluation that tries to construct
3351 * efficient control flow structures for &&, || and ! expressions
3353 static ir_node *create_condition_evaluation(const expression_t *expression,
3354 ir_node *true_block,
3355 ir_node *false_block)
3357 switch(expression->kind) {
3358 case EXPR_UNARY_NOT: {
3359 const unary_expression_t *unary_expression = &expression->unary;
3360 create_condition_evaluation(unary_expression->value, false_block,
3364 case EXPR_BINARY_LOGICAL_AND: {
3365 const binary_expression_t *binary_expression = &expression->binary;
3367 ir_node *extra_block = new_immBlock();
3368 create_condition_evaluation(binary_expression->left, extra_block,
3370 mature_immBlock(extra_block);
3371 set_cur_block(extra_block);
3372 create_condition_evaluation(binary_expression->right, true_block,
3376 case EXPR_BINARY_LOGICAL_OR: {
3377 const binary_expression_t *binary_expression = &expression->binary;
3379 ir_node *extra_block = new_immBlock();
3380 create_condition_evaluation(binary_expression->left, true_block,
3382 mature_immBlock(extra_block);
3383 set_cur_block(extra_block);
3384 create_condition_evaluation(binary_expression->right, true_block,
3392 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3393 ir_node *cond_expr = _expression_to_firm(expression);
3394 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3395 ir_node *cond = new_d_Cond(dbgi, condition);
3396 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3397 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3399 /* set branch prediction info based on __builtin_expect */
3400 if (is_builtin_expect(expression)) {
3401 call_argument_t *argument = expression->call.arguments->next;
3402 if (is_constant_expression(argument->expression)) {
3403 long cnst = fold_constant(argument->expression);
3404 cond_jmp_predicate pred;
3407 pred = COND_JMP_PRED_FALSE;
3409 pred = COND_JMP_PRED_TRUE;
3411 set_Cond_jmp_pred(cond, pred);
3415 add_immBlock_pred(true_block, true_proj);
3416 add_immBlock_pred(false_block, false_proj);
3418 set_cur_block(NULL);
3423 static void create_variable_entity(entity_t *variable,
3424 declaration_kind_t declaration_kind,
3425 ir_type *parent_type)
3427 assert(variable->kind == ENTITY_VARIABLE);
3428 type_t *type = skip_typeref(variable->declaration.type);
3429 type = get_aligned_type(type, variable->variable.alignment);
3431 ident *const id = new_id_from_str(variable->base.symbol->string);
3432 ir_type *const irtype = get_ir_type(type);
3433 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3435 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3437 handle_gnu_attributes_ent(irentity, variable);
3439 variable->declaration.kind = (unsigned char) declaration_kind;
3440 variable->variable.v.entity = irentity;
3441 set_entity_variability(irentity, variability_uninitialized);
3442 set_entity_ld_ident(irentity, create_ld_ident(variable));
3444 if (parent_type == get_tls_type())
3445 set_entity_allocation(irentity, allocation_automatic);
3446 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3447 set_entity_allocation(irentity, allocation_static);
3449 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3450 set_entity_volatility(irentity, volatility_is_volatile);
3455 typedef struct type_path_entry_t type_path_entry_t;
3456 struct type_path_entry_t {
3458 ir_initializer_t *initializer;
3460 entity_t *compound_entry;
3463 typedef struct type_path_t type_path_t;
3464 struct type_path_t {
3465 type_path_entry_t *path;
3470 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3472 size_t len = ARR_LEN(path->path);
3474 for (size_t i = 0; i < len; ++i) {
3475 const type_path_entry_t *entry = & path->path[i];
3477 type_t *type = skip_typeref(entry->type);
3478 if (is_type_compound(type)) {
3479 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3480 } else if (is_type_array(type)) {
3481 fprintf(stderr, "[%u]", (unsigned) entry->index);
3483 fprintf(stderr, "-INVALID-");
3486 fprintf(stderr, " (");
3487 print_type(path->top_type);
3488 fprintf(stderr, ")");
3491 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3493 size_t len = ARR_LEN(path->path);
3495 return & path->path[len-1];
3498 static type_path_entry_t *append_to_type_path(type_path_t *path)
3500 size_t len = ARR_LEN(path->path);
3501 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3503 type_path_entry_t *result = & path->path[len];
3504 memset(result, 0, sizeof(result[0]));
3508 static size_t get_compound_member_count(const compound_type_t *type)
3510 compound_t *compound = type->compound;
3511 size_t n_members = 0;
3512 entity_t *member = compound->members.entities;
3513 for ( ; member != NULL; member = member->base.next) {
3520 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3522 type_t *orig_top_type = path->top_type;
3523 type_t *top_type = skip_typeref(orig_top_type);
3525 assert(is_type_compound(top_type) || is_type_array(top_type));
3527 if (ARR_LEN(path->path) == 0) {
3530 type_path_entry_t *top = get_type_path_top(path);
3531 ir_initializer_t *initializer = top->initializer;
3532 return get_initializer_compound_value(initializer, top->index);
3536 static void descend_into_subtype(type_path_t *path)
3538 type_t *orig_top_type = path->top_type;
3539 type_t *top_type = skip_typeref(orig_top_type);
3541 assert(is_type_compound(top_type) || is_type_array(top_type));
3543 ir_initializer_t *initializer = get_initializer_entry(path);
3545 type_path_entry_t *top = append_to_type_path(path);
3546 top->type = top_type;
3550 if (is_type_compound(top_type)) {
3551 compound_t *compound = top_type->compound.compound;
3552 entity_t *entry = compound->members.entities;
3554 top->compound_entry = entry;
3556 len = get_compound_member_count(&top_type->compound);
3557 if (entry != NULL) {
3558 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3559 path->top_type = entry->declaration.type;
3562 assert(is_type_array(top_type));
3563 assert(top_type->array.size > 0);
3566 path->top_type = top_type->array.element_type;
3567 len = top_type->array.size;
3569 if (initializer == NULL
3570 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3571 initializer = create_initializer_compound(len);
3572 /* we have to set the entry at the 2nd latest path entry... */
3573 size_t path_len = ARR_LEN(path->path);
3574 assert(path_len >= 1);
3576 type_path_entry_t *entry = & path->path[path_len-2];
3577 ir_initializer_t *tinitializer = entry->initializer;
3578 set_initializer_compound_value(tinitializer, entry->index,
3582 top->initializer = initializer;
3585 static void ascend_from_subtype(type_path_t *path)
3587 type_path_entry_t *top = get_type_path_top(path);
3589 path->top_type = top->type;
3591 size_t len = ARR_LEN(path->path);
3592 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3595 static void walk_designator(type_path_t *path, const designator_t *designator)
3597 /* designators start at current object type */
3598 ARR_RESIZE(type_path_entry_t, path->path, 1);
3600 for ( ; designator != NULL; designator = designator->next) {
3601 type_path_entry_t *top = get_type_path_top(path);
3602 type_t *orig_type = top->type;
3603 type_t *type = skip_typeref(orig_type);
3605 if (designator->symbol != NULL) {
3606 assert(is_type_compound(type));
3608 symbol_t *symbol = designator->symbol;
3610 compound_t *compound = type->compound.compound;
3611 entity_t *iter = compound->members.entities;
3612 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3613 if (iter->base.symbol == symbol) {
3614 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3618 assert(iter != NULL);
3620 top->type = orig_type;
3621 top->compound_entry = iter;
3623 orig_type = iter->declaration.type;
3625 expression_t *array_index = designator->array_index;
3626 assert(designator->array_index != NULL);
3627 assert(is_type_array(type));
3629 long index = fold_constant(array_index);
3632 if (type->array.size_constant) {
3633 long array_size = type->array.size;
3634 assert(index < array_size);
3638 top->type = orig_type;
3639 top->index = (size_t) index;
3640 orig_type = type->array.element_type;
3642 path->top_type = orig_type;
3644 if (designator->next != NULL) {
3645 descend_into_subtype(path);
3649 path->invalid = false;
3652 static void advance_current_object(type_path_t *path)
3654 if (path->invalid) {
3655 /* TODO: handle this... */
3656 panic("invalid initializer in ast2firm (excessive elements)");
3659 type_path_entry_t *top = get_type_path_top(path);
3661 type_t *type = skip_typeref(top->type);
3662 if (is_type_union(type)) {
3663 top->compound_entry = NULL;
3664 } else if (is_type_struct(type)) {
3665 entity_t *entry = top->compound_entry;
3668 entry = entry->base.next;
3669 top->compound_entry = entry;
3670 if (entry != NULL) {
3671 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3672 path->top_type = entry->declaration.type;
3676 assert(is_type_array(type));
3679 if (!type->array.size_constant || top->index < type->array.size) {
3684 /* we're past the last member of the current sub-aggregate, try if we
3685 * can ascend in the type hierarchy and continue with another subobject */
3686 size_t len = ARR_LEN(path->path);
3689 ascend_from_subtype(path);
3690 advance_current_object(path);
3692 path->invalid = true;
3697 static ir_initializer_t *create_ir_initializer(
3698 const initializer_t *initializer, type_t *type);
3700 static ir_initializer_t *create_ir_initializer_value(
3701 const initializer_value_t *initializer)
3703 if (is_type_compound(initializer->value->base.type)) {
3704 panic("initializer creation for compounds not implemented yet");
3706 ir_node *value = expression_to_firm(initializer->value);
3707 type_t *type = initializer->value->base.type;
3708 ir_mode *mode = get_ir_mode_storage(type);
3709 value = create_conv(NULL, value, mode);
3710 return create_initializer_const(value);
3713 /** test wether type can be initialized by a string constant */
3714 static bool is_string_type(type_t *type)
3717 if (is_type_pointer(type)) {
3718 inner = skip_typeref(type->pointer.points_to);
3719 } else if(is_type_array(type)) {
3720 inner = skip_typeref(type->array.element_type);
3725 return is_type_integer(inner);
3728 static ir_initializer_t *create_ir_initializer_list(
3729 const initializer_list_t *initializer, type_t *type)
3732 memset(&path, 0, sizeof(path));
3733 path.top_type = type;
3734 path.path = NEW_ARR_F(type_path_entry_t, 0);
3736 descend_into_subtype(&path);
3738 for (size_t i = 0; i < initializer->len; ++i) {
3739 const initializer_t *sub_initializer = initializer->initializers[i];
3741 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3742 walk_designator(&path, sub_initializer->designator.designator);
3746 if (sub_initializer->kind == INITIALIZER_VALUE) {
3747 /* we might have to descend into types until we're at a scalar
3750 type_t *orig_top_type = path.top_type;
3751 type_t *top_type = skip_typeref(orig_top_type);
3753 if (is_type_scalar(top_type))
3755 descend_into_subtype(&path);
3757 } else if (sub_initializer->kind == INITIALIZER_STRING
3758 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3759 /* we might have to descend into types until we're at a scalar
3762 type_t *orig_top_type = path.top_type;
3763 type_t *top_type = skip_typeref(orig_top_type);
3765 if (is_string_type(top_type))
3767 descend_into_subtype(&path);
3771 ir_initializer_t *sub_irinitializer
3772 = create_ir_initializer(sub_initializer, path.top_type);
3774 size_t path_len = ARR_LEN(path.path);
3775 assert(path_len >= 1);
3776 type_path_entry_t *entry = & path.path[path_len-1];
3777 ir_initializer_t *tinitializer = entry->initializer;
3778 set_initializer_compound_value(tinitializer, entry->index,
3781 advance_current_object(&path);
3784 assert(ARR_LEN(path.path) >= 1);
3785 ir_initializer_t *result = path.path[0].initializer;
3786 DEL_ARR_F(path.path);
3791 static ir_initializer_t *create_ir_initializer_string(
3792 const initializer_string_t *initializer, type_t *type)
3794 type = skip_typeref(type);
3796 size_t string_len = initializer->string.size;
3797 assert(type->kind == TYPE_ARRAY);
3798 assert(type->array.size_constant);
3799 size_t len = type->array.size;
3800 ir_initializer_t *irinitializer = create_initializer_compound(len);
3802 const char *string = initializer->string.begin;
3803 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3805 for (size_t i = 0; i < len; ++i) {
3810 tarval *tv = new_tarval_from_long(c, mode);
3811 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3813 set_initializer_compound_value(irinitializer, i, char_initializer);
3816 return irinitializer;
3819 static ir_initializer_t *create_ir_initializer_wide_string(
3820 const initializer_wide_string_t *initializer, type_t *type)
3822 size_t string_len = initializer->string.size;
3823 assert(type->kind == TYPE_ARRAY);
3824 assert(type->array.size_constant);
3825 size_t len = type->array.size;
3826 ir_initializer_t *irinitializer = create_initializer_compound(len);
3828 const wchar_rep_t *string = initializer->string.begin;
3829 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3831 for (size_t i = 0; i < len; ++i) {
3833 if (i < string_len) {
3836 tarval *tv = new_tarval_from_long(c, mode);
3837 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3839 set_initializer_compound_value(irinitializer, i, char_initializer);
3842 return irinitializer;
3845 static ir_initializer_t *create_ir_initializer(
3846 const initializer_t *initializer, type_t *type)
3848 switch(initializer->kind) {
3849 case INITIALIZER_STRING:
3850 return create_ir_initializer_string(&initializer->string, type);
3852 case INITIALIZER_WIDE_STRING:
3853 return create_ir_initializer_wide_string(&initializer->wide_string,
3856 case INITIALIZER_LIST:
3857 return create_ir_initializer_list(&initializer->list, type);
3859 case INITIALIZER_VALUE:
3860 return create_ir_initializer_value(&initializer->value);
3862 case INITIALIZER_DESIGNATOR:
3863 panic("unexpected designator initializer found");
3865 panic("unknown initializer");
3868 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3871 if (is_atomic_type(type)) {
3872 ir_mode *mode = get_type_mode(type);
3873 tarval *zero = get_mode_null(mode);
3874 ir_node *cnst = new_d_Const(dbgi, zero);
3876 /* TODO: bitfields */
3877 ir_node *mem = get_store();
3878 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3879 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3882 assert(is_compound_type(type));
3885 if (is_Array_type(type)) {
3886 assert(has_array_upper_bound(type, 0));
3887 n_members = get_array_upper_bound_int(type, 0);
3889 n_members = get_compound_n_members(type);
3892 for (int i = 0; i < n_members; ++i) {
3895 if (is_Array_type(type)) {
3896 ir_entity *entity = get_array_element_entity(type);
3897 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3898 ir_node *cnst = new_d_Const(dbgi, index_tv);
3899 ir_node *in[1] = { cnst };
3900 irtype = get_array_element_type(type);
3901 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3903 ir_entity *member = get_compound_member(type, i);
3905 irtype = get_entity_type(member);
3906 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3909 create_dynamic_null_initializer(irtype, dbgi, addr);
3914 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3915 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3917 switch(get_initializer_kind(initializer)) {
3918 case IR_INITIALIZER_NULL: {
3919 create_dynamic_null_initializer(type, dbgi, base_addr);
3922 case IR_INITIALIZER_CONST: {
3923 ir_node *node = get_initializer_const_value(initializer);
3924 ir_mode *mode = get_irn_mode(node);
3925 ir_type *ent_type = get_entity_type(entity);
3927 /* is it a bitfield type? */
3928 if (is_Primitive_type(ent_type) &&
3929 get_primitive_base_type(ent_type) != NULL) {
3930 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3934 assert(get_type_mode(type) == mode);
3935 ir_node *mem = get_store();
3936 ir_node *store = new_d_Store(dbgi, mem, base_addr, node);
3937 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3941 case IR_INITIALIZER_TARVAL: {
3942 tarval *tv = get_initializer_tarval_value(initializer);
3943 ir_mode *mode = get_tarval_mode(tv);
3944 ir_node *cnst = new_d_Const(dbgi, tv);
3945 ir_type *ent_type = get_entity_type(entity);
3947 /* is it a bitfield type? */
3948 if (is_Primitive_type(ent_type) &&
3949 get_primitive_base_type(ent_type) != NULL) {
3950 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3954 assert(get_type_mode(type) == mode);
3955 ir_node *mem = get_store();
3956 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3957 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3961 case IR_INITIALIZER_COMPOUND: {
3962 assert(is_compound_type(type));
3964 if (is_Array_type(type)) {
3965 assert(has_array_upper_bound(type, 0));
3966 n_members = get_array_upper_bound_int(type, 0);
3968 n_members = get_compound_n_members(type);
3971 if (get_initializer_compound_n_entries(initializer)
3972 != (unsigned) n_members)
3973 panic("initializer doesn't match compound type");
3975 for (int i = 0; i < n_members; ++i) {
3978 ir_entity *sub_entity;
3979 if (is_Array_type(type)) {
3980 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3981 ir_node *cnst = new_d_Const(dbgi, index_tv);
3982 ir_node *in[1] = { cnst };
3983 irtype = get_array_element_type(type);
3984 sub_entity = get_array_element_entity(type);
3985 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3988 sub_entity = get_compound_member(type, i);
3989 irtype = get_entity_type(sub_entity);
3990 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3994 ir_initializer_t *sub_init
3995 = get_initializer_compound_value(initializer, i);
3997 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4004 panic("invalid IR_INITIALIZER found");
4007 static void create_dynamic_initializer(ir_initializer_t *initializer,
4008 dbg_info *dbgi, ir_entity *entity)
4010 ir_node *frame = get_local_frame(entity);
4011 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4012 ir_type *type = get_entity_type(entity);
4014 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4017 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4018 ir_entity *entity, type_t *type)
4020 ir_node *memory = get_store();
4021 ir_node *nomem = new_NoMem();
4022 ir_node *frame = get_irg_frame(current_ir_graph);
4023 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4025 if (initializer->kind == INITIALIZER_VALUE) {
4026 initializer_value_t *initializer_value = &initializer->value;
4028 ir_node *value = expression_to_firm(initializer_value->value);
4029 type = skip_typeref(type);
4030 assign_value(dbgi, addr, type, value);
4034 if (!is_constant_initializer(initializer)) {
4035 ir_initializer_t *irinitializer
4036 = create_ir_initializer(initializer, type);
4038 create_dynamic_initializer(irinitializer, dbgi, entity);
4042 /* create the ir_initializer */
4043 ir_graph *const old_current_ir_graph = current_ir_graph;
4044 current_ir_graph = get_const_code_irg();
4046 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4048 assert(current_ir_graph == get_const_code_irg());
4049 current_ir_graph = old_current_ir_graph;
4051 /* create a "template" entity which is copied to the entity on the stack */
4052 ident *const id = id_unique("initializer.%u");
4053 ir_type *const irtype = get_ir_type(type);
4054 ir_type *const global_type = get_glob_type();
4055 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4056 set_entity_ld_ident(init_entity, id);
4058 set_entity_variability(init_entity, variability_initialized);
4059 set_entity_visibility(init_entity, visibility_local);
4060 set_entity_allocation(init_entity, allocation_static);
4062 set_entity_initializer(init_entity, irinitializer);
4064 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4065 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4067 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4068 set_store(copyb_mem);
4071 static void create_initializer_local_variable_entity(entity_t *entity)
4073 assert(entity->kind == ENTITY_VARIABLE);
4074 initializer_t *initializer = entity->variable.initializer;
4075 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4076 ir_entity *irentity = entity->variable.v.entity;
4077 type_t *type = entity->declaration.type;
4079 type = get_aligned_type(type, entity->variable.alignment);
4080 create_local_initializer(initializer, dbgi, irentity, type);
4083 static void create_variable_initializer(entity_t *entity)
4085 assert(entity->kind == ENTITY_VARIABLE);
4086 initializer_t *initializer = entity->variable.initializer;
4087 if (initializer == NULL)
4090 declaration_kind_t declaration_kind
4091 = (declaration_kind_t) entity->declaration.kind;
4092 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4093 create_initializer_local_variable_entity(entity);
4097 type_t *type = entity->declaration.type;
4098 type_qualifiers_t tq = get_type_qualifier(type, true);
4100 if (initializer->kind == INITIALIZER_VALUE) {
4101 initializer_value_t *initializer_value = &initializer->value;
4102 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4104 ir_node *value = expression_to_firm(initializer_value->value);
4106 type_t *type = initializer_value->value->base.type;
4107 ir_mode *mode = get_ir_mode_storage(type);
4108 value = create_conv(dbgi, value, mode);
4109 value = do_strict_conv(dbgi, value);
4111 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4112 set_value(entity->variable.v.value_number, value);
4114 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4116 ir_entity *irentity = entity->variable.v.entity;
4118 if (tq & TYPE_QUALIFIER_CONST) {
4119 set_entity_variability(irentity, variability_constant);
4121 set_entity_variability(irentity, variability_initialized);
4123 set_atomic_ent_value(irentity, value);
4126 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4127 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4129 ir_entity *irentity = entity->variable.v.entity;
4130 ir_initializer_t *irinitializer
4131 = create_ir_initializer(initializer, type);
4133 if (tq & TYPE_QUALIFIER_CONST) {
4134 set_entity_variability(irentity, variability_constant);
4136 set_entity_variability(irentity, variability_initialized);
4138 set_entity_initializer(irentity, irinitializer);
4142 static void create_variable_length_array(entity_t *entity)
4144 assert(entity->kind == ENTITY_VARIABLE);
4145 assert(entity->variable.initializer == NULL);
4147 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4148 entity->variable.v.vla_base = NULL;
4150 /* TODO: record VLA somewhere so we create the free node when we leave
4154 static void allocate_variable_length_array(entity_t *entity)
4156 assert(entity->kind == ENTITY_VARIABLE);
4157 assert(entity->variable.initializer == NULL);
4158 assert(get_cur_block() != NULL);
4160 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4161 type_t *type = entity->declaration.type;
4162 ir_type *el_type = get_ir_type(type->array.element_type);
4164 /* make sure size_node is calculated */
4165 get_type_size(type);
4166 ir_node *elems = type->array.size_node;
4167 ir_node *mem = get_store();
4168 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4170 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4171 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4174 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4175 entity->variable.v.vla_base = addr;
4179 * Creates a Firm local variable from a declaration.
4181 static void create_local_variable(entity_t *entity)
4183 assert(entity->kind == ENTITY_VARIABLE);
4184 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4186 bool needs_entity = entity->variable.address_taken;
4187 type_t *type = skip_typeref(entity->declaration.type);
4189 /* is it a variable length array? */
4190 if (is_type_array(type) && !type->array.size_constant) {
4191 create_variable_length_array(entity);
4193 } else if (is_type_array(type) || is_type_compound(type)) {
4194 needs_entity = true;
4195 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4196 needs_entity = true;
4200 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4201 create_variable_entity(entity,
4202 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4205 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4206 entity->variable.v.value_number = next_value_number_function;
4207 set_irg_loc_description(current_ir_graph, next_value_number_function,
4209 ++next_value_number_function;
4213 static void create_local_static_variable(entity_t *entity)
4215 assert(entity->kind == ENTITY_VARIABLE);
4216 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4218 type_t *type = skip_typeref(entity->declaration.type);
4219 type = get_aligned_type(type, entity->variable.alignment);
4221 ir_type *const var_type = entity->variable.thread_local ?
4222 get_tls_type() : get_glob_type();
4223 ir_type *const irtype = get_ir_type(type);
4224 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4226 size_t l = strlen(entity->base.symbol->string);
4227 char buf[l + sizeof(".%u")];
4228 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4229 ident *const id = id_unique(buf);
4231 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4233 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4234 set_entity_volatility(irentity, volatility_is_volatile);
4237 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4238 entity->variable.v.entity = irentity;
4240 set_entity_ld_ident(irentity, id);
4241 set_entity_variability(irentity, variability_uninitialized);
4242 set_entity_visibility(irentity, visibility_local);
4243 set_entity_allocation(irentity, entity->variable.thread_local ?
4244 allocation_automatic : allocation_static);
4246 ir_graph *const old_current_ir_graph = current_ir_graph;
4247 current_ir_graph = get_const_code_irg();
4249 create_variable_initializer(entity);
4251 assert(current_ir_graph == get_const_code_irg());
4252 current_ir_graph = old_current_ir_graph;
4257 static void return_statement_to_firm(return_statement_t *statement)
4259 if (get_cur_block() == NULL)
4262 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4263 type_t *type = current_function_entity->declaration.type;
4264 ir_type *func_irtype = get_ir_type(type);
4269 if (get_method_n_ress(func_irtype) > 0) {
4270 ir_type *res_type = get_method_res_type(func_irtype, 0);
4272 if (statement->value != NULL) {
4273 ir_node *node = expression_to_firm(statement->value);
4274 if (!is_compound_type(res_type)) {
4275 type_t *type = statement->value->base.type;
4276 ir_mode *mode = get_ir_mode_storage(type);
4277 node = create_conv(dbgi, node, mode);
4278 node = do_strict_conv(dbgi, node);
4283 if (is_compound_type(res_type)) {
4286 mode = get_type_mode(res_type);
4288 in[0] = new_Unknown(mode);
4292 /* build return_value for its side effects */
4293 if (statement->value != NULL) {
4294 expression_to_firm(statement->value);
4299 ir_node *store = get_store();
4300 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4302 ir_node *end_block = get_irg_end_block(current_ir_graph);
4303 add_immBlock_pred(end_block, ret);
4305 set_cur_block(NULL);
4308 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4310 if (get_cur_block() == NULL)
4313 return expression_to_firm(statement->expression);
4316 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4318 entity_t *entity = compound->scope.entities;
4319 for ( ; entity != NULL; entity = entity->base.next) {
4320 if (!is_declaration(entity))
4323 create_local_declaration(entity);
4326 ir_node *result = NULL;
4327 statement_t *statement = compound->statements;
4328 for ( ; statement != NULL; statement = statement->base.next) {
4329 if (statement->base.next == NULL
4330 && statement->kind == STATEMENT_EXPRESSION) {
4331 result = expression_statement_to_firm(
4332 &statement->expression);
4335 statement_to_firm(statement);
4341 static void create_global_variable(entity_t *entity)
4343 assert(entity->kind == ENTITY_VARIABLE);
4346 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4347 case STORAGE_CLASS_STATIC: vis = visibility_local; break;
4348 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4349 case STORAGE_CLASS_NONE: vis = visibility_external_visible; break;
4351 default: panic("Invalid storage class for global variable");
4354 ir_type *var_type = entity->variable.thread_local ?
4355 get_tls_type() : get_glob_type();
4356 create_variable_entity(entity,
4357 DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4358 set_entity_visibility(entity->variable.v.entity, vis);
4361 static void create_local_declaration(entity_t *entity)
4363 assert(is_declaration(entity));
4365 /* construct type */
4366 (void) get_ir_type(entity->declaration.type);
4367 if (entity->base.symbol == NULL) {
4371 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4372 case STORAGE_CLASS_STATIC:
4373 create_local_static_variable(entity);
4375 case STORAGE_CLASS_EXTERN:
4376 if (entity->kind == ENTITY_FUNCTION) {
4377 assert(entity->function.statement == NULL);
4378 get_function_entity(entity);
4380 create_global_variable(entity);
4381 create_variable_initializer(entity);
4384 case STORAGE_CLASS_NONE:
4385 case STORAGE_CLASS_AUTO:
4386 case STORAGE_CLASS_REGISTER:
4387 if (entity->kind == ENTITY_FUNCTION) {
4388 if (entity->function.statement != NULL) {
4389 get_function_entity(entity);
4390 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4391 enqueue_inner_function(entity);
4393 get_function_entity(entity);
4396 create_local_variable(entity);
4399 case STORAGE_CLASS_TYPEDEF:
4402 panic("invalid storage class found");
4405 static void initialize_local_declaration(entity_t *entity)
4407 if (entity->base.symbol == NULL)
4410 switch ((declaration_kind_t) entity->declaration.kind) {
4411 case DECLARATION_KIND_LOCAL_VARIABLE:
4412 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4413 create_variable_initializer(entity);
4416 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4417 allocate_variable_length_array(entity);
4420 case DECLARATION_KIND_COMPOUND_MEMBER:
4421 case DECLARATION_KIND_GLOBAL_VARIABLE:
4422 case DECLARATION_KIND_FUNCTION:
4423 case DECLARATION_KIND_INNER_FUNCTION:
4426 case DECLARATION_KIND_PARAMETER:
4427 case DECLARATION_KIND_PARAMETER_ENTITY:
4428 panic("can't initialize parameters");
4430 case DECLARATION_KIND_UNKNOWN:
4431 panic("can't initialize unknown declaration");
4433 panic("invalid declaration kind");
4436 static void declaration_statement_to_firm(declaration_statement_t *statement)
4438 entity_t * entity = statement->declarations_begin;
4439 entity_t *const last = statement->declarations_end;
4440 if (entity != NULL) {
4441 for ( ;; entity = entity->base.next) {
4442 if (is_declaration(entity)) {
4443 initialize_local_declaration(entity);
4444 } else if (entity->kind == ENTITY_TYPEDEF) {
4445 type_t *const type = skip_typeref(entity->typedefe.type);
4446 if (is_type_array(type) && type->array.is_vla)
4447 get_vla_size(&type->array);
4455 static void if_statement_to_firm(if_statement_t *statement)
4457 ir_node *cur_block = get_cur_block();
4459 ir_node *fallthrough_block = NULL;
4461 /* the true (blocks) */
4462 ir_node *true_block = NULL;
4463 if (statement->true_statement != NULL) {
4464 true_block = new_immBlock();
4465 set_cur_block(true_block);
4466 statement_to_firm(statement->true_statement);
4467 if (get_cur_block() != NULL) {
4468 ir_node *jmp = new_Jmp();
4469 if (fallthrough_block == NULL)
4470 fallthrough_block = new_immBlock();
4471 add_immBlock_pred(fallthrough_block, jmp);
4475 /* the false (blocks) */
4476 ir_node *false_block = NULL;
4477 if (statement->false_statement != NULL) {
4478 false_block = new_immBlock();
4479 set_cur_block(false_block);
4481 statement_to_firm(statement->false_statement);
4482 if (get_cur_block() != NULL) {
4483 ir_node *jmp = new_Jmp();
4484 if (fallthrough_block == NULL)
4485 fallthrough_block = new_immBlock();
4486 add_immBlock_pred(fallthrough_block, jmp);
4490 /* create the condition */
4491 if (cur_block != NULL) {
4492 if (true_block == NULL || false_block == NULL) {
4493 if (fallthrough_block == NULL)
4494 fallthrough_block = new_immBlock();
4495 if (true_block == NULL)
4496 true_block = fallthrough_block;
4497 if (false_block == NULL)
4498 false_block = fallthrough_block;
4501 set_cur_block(cur_block);
4502 create_condition_evaluation(statement->condition, true_block,
4506 mature_immBlock(true_block);
4507 if (false_block != fallthrough_block && false_block != NULL) {
4508 mature_immBlock(false_block);
4510 if (fallthrough_block != NULL) {
4511 mature_immBlock(fallthrough_block);
4514 set_cur_block(fallthrough_block);
4517 static void while_statement_to_firm(while_statement_t *statement)
4519 ir_node *jmp = NULL;
4520 if (get_cur_block() != NULL) {
4524 /* create the header block */
4525 ir_node *header_block = new_immBlock();
4527 add_immBlock_pred(header_block, jmp);
4531 ir_node *old_continue_label = continue_label;
4532 ir_node *old_break_label = break_label;
4533 continue_label = header_block;
4536 ir_node *body_block = new_immBlock();
4537 set_cur_block(body_block);
4538 statement_to_firm(statement->body);
4539 ir_node *false_block = break_label;
4541 assert(continue_label == header_block);
4542 continue_label = old_continue_label;
4543 break_label = old_break_label;
4545 if (get_cur_block() != NULL) {
4547 add_immBlock_pred(header_block, jmp);
4550 /* shortcut for while(true) */
4551 if (is_constant_expression(statement->condition)
4552 && fold_constant(statement->condition) != 0) {
4553 set_cur_block(header_block);
4554 ir_node *header_jmp = new_Jmp();
4555 add_immBlock_pred(body_block, header_jmp);
4557 keep_alive(body_block);
4558 keep_all_memory(body_block);
4559 set_cur_block(body_block);
4561 if (false_block == NULL) {
4562 false_block = new_immBlock();
4565 /* create the condition */
4566 set_cur_block(header_block);
4568 create_condition_evaluation(statement->condition, body_block,
4572 mature_immBlock(body_block);
4573 mature_immBlock(header_block);
4574 if (false_block != NULL) {
4575 mature_immBlock(false_block);
4578 set_cur_block(false_block);
4581 static void do_while_statement_to_firm(do_while_statement_t *statement)
4583 ir_node *jmp = NULL;
4584 if (get_cur_block() != NULL) {
4588 /* create the header block */
4589 ir_node *header_block = new_immBlock();
4592 ir_node *body_block = new_immBlock();
4594 add_immBlock_pred(body_block, jmp);
4597 ir_node *old_continue_label = continue_label;
4598 ir_node *old_break_label = break_label;
4599 continue_label = header_block;
4602 set_cur_block(body_block);
4603 statement_to_firm(statement->body);
4604 ir_node *false_block = break_label;
4606 assert(continue_label == header_block);
4607 continue_label = old_continue_label;
4608 break_label = old_break_label;
4610 if (get_cur_block() != NULL) {
4611 ir_node *body_jmp = new_Jmp();
4612 add_immBlock_pred(header_block, body_jmp);
4613 mature_immBlock(header_block);
4616 if (false_block == NULL) {
4617 false_block = new_immBlock();
4620 /* create the condition */
4621 set_cur_block(header_block);
4623 create_condition_evaluation(statement->condition, body_block, false_block);
4624 mature_immBlock(body_block);
4625 mature_immBlock(header_block);
4626 mature_immBlock(false_block);
4628 set_cur_block(false_block);
4631 static void for_statement_to_firm(for_statement_t *statement)
4633 ir_node *jmp = NULL;
4635 /* create declarations */
4636 entity_t *entity = statement->scope.entities;
4637 for ( ; entity != NULL; entity = entity->base.next) {
4638 if (!is_declaration(entity))
4641 create_local_declaration(entity);
4644 if (get_cur_block() != NULL) {
4645 entity = statement->scope.entities;
4646 for ( ; entity != NULL; entity = entity->base.next) {
4647 if (!is_declaration(entity))
4650 initialize_local_declaration(entity);
4653 if (statement->initialisation != NULL) {
4654 expression_to_firm(statement->initialisation);
4661 /* create the step block */
4662 ir_node *const step_block = new_immBlock();
4663 set_cur_block(step_block);
4664 if (statement->step != NULL) {
4665 expression_to_firm(statement->step);
4667 ir_node *const step_jmp = new_Jmp();
4669 /* create the header block */
4670 ir_node *const header_block = new_immBlock();
4671 set_cur_block(header_block);
4673 add_immBlock_pred(header_block, jmp);
4675 add_immBlock_pred(header_block, step_jmp);
4677 /* the false block */
4678 ir_node *const false_block = new_immBlock();
4681 ir_node *body_block;
4682 if (statement->body != NULL) {
4683 ir_node *const old_continue_label = continue_label;
4684 ir_node *const old_break_label = break_label;
4685 continue_label = step_block;
4686 break_label = false_block;
4688 body_block = new_immBlock();
4689 set_cur_block(body_block);
4690 statement_to_firm(statement->body);
4692 assert(continue_label == step_block);
4693 assert(break_label == false_block);
4694 continue_label = old_continue_label;
4695 break_label = old_break_label;
4697 if (get_cur_block() != NULL) {
4699 add_immBlock_pred(step_block, jmp);
4702 body_block = step_block;
4705 /* create the condition */
4706 set_cur_block(header_block);
4707 if (statement->condition != NULL) {
4708 create_condition_evaluation(statement->condition, body_block,
4711 keep_alive(header_block);
4712 keep_all_memory(header_block);
4714 add_immBlock_pred(body_block, jmp);
4717 mature_immBlock(body_block);
4718 mature_immBlock(false_block);
4719 mature_immBlock(step_block);
4720 mature_immBlock(header_block);
4721 mature_immBlock(false_block);
4723 set_cur_block(false_block);
4726 static void create_jump_statement(const statement_t *statement,
4727 ir_node *target_block)
4729 if (get_cur_block() == NULL)
4732 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4733 ir_node *jump = new_d_Jmp(dbgi);
4734 add_immBlock_pred(target_block, jump);
4736 set_cur_block(NULL);
4739 static ir_node *get_break_label(void)
4741 if (break_label == NULL) {
4742 break_label = new_immBlock();
4747 static void switch_statement_to_firm(switch_statement_t *statement)
4749 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4751 ir_node *expression = expression_to_firm(statement->expression);
4752 ir_node *cond = new_d_Cond(dbgi, expression);
4754 set_cur_block(NULL);
4756 ir_node *const old_switch_cond = current_switch_cond;
4757 ir_node *const old_break_label = break_label;
4758 const bool old_saw_default_label = saw_default_label;
4759 saw_default_label = false;
4760 current_switch_cond = cond;
4762 switch_statement_t *const old_switch = current_switch;
4763 current_switch = statement;
4765 /* determine a free number for the default label */
4766 unsigned long num_cases = 0;
4768 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4769 if (l->expression == NULL) {
4773 if (l->last_case >= l->first_case)
4774 num_cases += l->last_case - l->first_case + 1;
4775 if (l->last_case > def_nr)
4776 def_nr = l->last_case;
4779 if (def_nr == INT_MAX) {
4780 /* Bad: an overflow will occurr, we cannot be sure that the
4781 * maximum + 1 is a free number. Scan the values a second
4782 * time to find a free number.
4784 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4786 memset(bits, 0, (num_cases + 7) >> 3);
4787 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4788 if (l->expression == NULL) {
4792 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4793 if (start < num_cases && l->last_case >= 0) {
4794 unsigned long end = (unsigned long)l->last_case < num_cases ?
4795 (unsigned long)l->last_case : num_cases - 1;
4796 for (unsigned long cns = start; cns <= end; ++cns) {
4797 bits[cns >> 3] |= (1 << (cns & 7));
4801 /* We look at the first num_cases constants:
4802 * Either they are densed, so we took the last (num_cases)
4803 * one, or they are non densed, so we will find one free
4807 for (i = 0; i < num_cases; ++i)
4808 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4816 statement->default_proj_nr = def_nr;
4818 if (statement->body != NULL) {
4819 statement_to_firm(statement->body);
4822 if (get_cur_block() != NULL) {
4823 ir_node *jmp = new_Jmp();
4824 add_immBlock_pred(get_break_label(), jmp);
4827 if (!saw_default_label) {
4828 set_cur_block(get_nodes_block(cond));
4829 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4830 statement->default_proj_nr);
4831 add_immBlock_pred(get_break_label(), proj);
4834 if (break_label != NULL) {
4835 mature_immBlock(break_label);
4837 set_cur_block(break_label);
4839 assert(current_switch_cond == cond);
4840 current_switch = old_switch;
4841 current_switch_cond = old_switch_cond;
4842 break_label = old_break_label;
4843 saw_default_label = old_saw_default_label;
4846 static void case_label_to_firm(const case_label_statement_t *statement)
4848 if (statement->is_empty_range)
4851 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4853 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4856 ir_node *block = new_immBlock();
4858 set_cur_block(get_nodes_block(current_switch_cond));
4859 if (statement->expression != NULL) {
4860 long pn = statement->first_case;
4861 long end_pn = statement->last_case;
4862 assert(pn <= end_pn);
4863 /* create jumps for all cases in the given range */
4865 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4866 add_immBlock_pred(block, proj);
4867 } while(pn++ < end_pn);
4869 saw_default_label = true;
4870 proj = new_d_defaultProj(dbgi, current_switch_cond,
4871 current_switch->default_proj_nr);
4873 add_immBlock_pred(block, proj);
4876 if (fallthrough != NULL) {
4877 add_immBlock_pred(block, fallthrough);
4879 mature_immBlock(block);
4880 set_cur_block(block);
4882 if (statement->statement != NULL) {
4883 statement_to_firm(statement->statement);
4887 static void label_to_firm(const label_statement_t *statement)
4889 ir_node *block = get_label_block(statement->label);
4891 if (get_cur_block() != NULL) {
4892 ir_node *jmp = new_Jmp();
4893 add_immBlock_pred(block, jmp);
4896 set_cur_block(block);
4898 keep_all_memory(block);
4900 if (statement->statement != NULL) {
4901 statement_to_firm(statement->statement);
4905 static void goto_to_firm(const goto_statement_t *statement)
4907 if (get_cur_block() == NULL)
4910 if (statement->expression) {
4911 ir_node *irn = expression_to_firm(statement->expression);
4912 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4913 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4915 set_irn_link(ijmp, ijmp_list);
4918 ir_node *block = get_label_block(statement->label);
4919 ir_node *jmp = new_Jmp();
4920 add_immBlock_pred(block, jmp);
4922 set_cur_block(NULL);
4925 static void asm_statement_to_firm(const asm_statement_t *statement)
4927 bool needs_memory = false;
4929 if (statement->is_volatile) {
4930 needs_memory = true;
4933 size_t n_clobbers = 0;
4934 asm_clobber_t *clobber = statement->clobbers;
4935 for ( ; clobber != NULL; clobber = clobber->next) {
4936 const char *clobber_str = clobber->clobber.begin;
4938 if (!be_is_valid_clobber(clobber_str)) {
4939 errorf(&statement->base.source_position,
4940 "invalid clobber '%s' specified", clobber->clobber);
4944 if (strcmp(clobber_str, "memory") == 0) {
4945 needs_memory = true;
4949 ident *id = new_id_from_str(clobber_str);
4950 obstack_ptr_grow(&asm_obst, id);
4953 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4954 ident **clobbers = NULL;
4955 if (n_clobbers > 0) {
4956 clobbers = obstack_finish(&asm_obst);
4959 size_t n_inputs = 0;
4960 asm_argument_t *argument = statement->inputs;
4961 for ( ; argument != NULL; argument = argument->next)
4963 size_t n_outputs = 0;
4964 argument = statement->outputs;
4965 for ( ; argument != NULL; argument = argument->next)
4968 unsigned next_pos = 0;
4970 ir_node *ins[n_inputs + n_outputs + 1];
4973 ir_asm_constraint tmp_in_constraints[n_outputs];
4975 const expression_t *out_exprs[n_outputs];
4976 ir_node *out_addrs[n_outputs];
4977 size_t out_size = 0;
4979 argument = statement->outputs;
4980 for ( ; argument != NULL; argument = argument->next) {
4981 const char *constraints = argument->constraints.begin;
4982 asm_constraint_flags_t asm_flags
4983 = be_parse_asm_constraints(constraints);
4985 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4986 warningf(&statement->base.source_position,
4987 "some constraints in '%s' are not supported", constraints);
4989 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4990 errorf(&statement->base.source_position,
4991 "some constraints in '%s' are invalid", constraints);
4994 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4995 errorf(&statement->base.source_position,
4996 "no write flag specified for output constraints '%s'",
5001 unsigned pos = next_pos++;
5002 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5003 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5004 expression_t *expr = argument->expression;
5005 ir_node *addr = expression_to_addr(expr);
5006 /* in+output, construct an artifical same_as constraint on the
5008 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5010 ir_node *value = get_value_from_lvalue(expr, addr);
5012 snprintf(buf, sizeof(buf), "%u", pos);
5014 ir_asm_constraint constraint;
5015 constraint.pos = pos;
5016 constraint.constraint = new_id_from_str(buf);
5017 constraint.mode = get_ir_mode_storage(expr->base.type);
5018 tmp_in_constraints[in_size] = constraint;
5019 ins[in_size] = value;
5024 out_exprs[out_size] = expr;
5025 out_addrs[out_size] = addr;
5027 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5028 /* pure memory ops need no input (but we have to make sure we
5029 * attach to the memory) */
5030 assert(! (asm_flags &
5031 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5032 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5033 needs_memory = true;
5035 /* we need to attach the address to the inputs */
5036 expression_t *expr = argument->expression;
5038 ir_asm_constraint constraint;
5039 constraint.pos = pos;
5040 constraint.constraint = new_id_from_str(constraints);
5041 constraint.mode = NULL;
5042 tmp_in_constraints[in_size] = constraint;
5044 ins[in_size] = expression_to_addr(expr);
5048 errorf(&statement->base.source_position,
5049 "only modifiers but no place set in constraints '%s'",
5054 ir_asm_constraint constraint;
5055 constraint.pos = pos;
5056 constraint.constraint = new_id_from_str(constraints);
5057 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5059 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5061 assert(obstack_object_size(&asm_obst)
5062 == out_size * sizeof(ir_asm_constraint));
5063 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5066 obstack_grow(&asm_obst, tmp_in_constraints,
5067 in_size * sizeof(tmp_in_constraints[0]));
5068 /* find and count input and output arguments */
5069 argument = statement->inputs;
5070 for ( ; argument != NULL; argument = argument->next) {
5071 const char *constraints = argument->constraints.begin;
5072 asm_constraint_flags_t asm_flags
5073 = be_parse_asm_constraints(constraints);
5075 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5076 errorf(&statement->base.source_position,
5077 "some constraints in '%s' are not supported", constraints);
5080 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5081 errorf(&statement->base.source_position,
5082 "some constraints in '%s' are invalid", constraints);
5085 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5086 errorf(&statement->base.source_position,
5087 "write flag specified for input constraints '%s'",
5093 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5094 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5095 /* we can treat this as "normal" input */
5096 input = expression_to_firm(argument->expression);
5097 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5098 /* pure memory ops need no input (but we have to make sure we
5099 * attach to the memory) */
5100 assert(! (asm_flags &
5101 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5102 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5103 needs_memory = true;
5104 input = expression_to_addr(argument->expression);
5106 errorf(&statement->base.source_position,
5107 "only modifiers but no place set in constraints '%s'",
5112 ir_asm_constraint constraint;
5113 constraint.pos = next_pos++;
5114 constraint.constraint = new_id_from_str(constraints);
5115 constraint.mode = get_irn_mode(input);
5117 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5118 ins[in_size++] = input;
5122 ir_asm_constraint constraint;
5123 constraint.pos = next_pos++;
5124 constraint.constraint = new_id_from_str("");
5125 constraint.mode = mode_M;
5127 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5128 ins[in_size++] = get_store();
5131 assert(obstack_object_size(&asm_obst)
5132 == in_size * sizeof(ir_asm_constraint));
5133 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5135 /* create asm node */
5136 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5138 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5140 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5141 out_size, output_constraints,
5142 n_clobbers, clobbers, asm_text);
5144 if (statement->is_volatile) {
5145 set_irn_pinned(node, op_pin_state_pinned);
5147 set_irn_pinned(node, op_pin_state_floats);
5150 /* create output projs & connect them */
5152 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5157 for (i = 0; i < out_size; ++i) {
5158 const expression_t *out_expr = out_exprs[i];
5160 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5161 ir_node *proj = new_Proj(node, mode, pn);
5162 ir_node *addr = out_addrs[i];
5164 set_value_for_expression_addr(out_expr, proj, addr);
5168 static void ms_try_statement_to_firm(ms_try_statement_t *statement) {
5169 statement_to_firm(statement->try_statement);
5170 warningf(&statement->base.source_position, "structured exception handling ignored");
5173 static void leave_statement_to_firm(leave_statement_t *statement) {
5174 errorf(&statement->base.source_position, "__leave not supported yet");
5178 * Transform a statement.
5180 static void statement_to_firm(statement_t *statement)
5183 assert(!statement->base.transformed);
5184 statement->base.transformed = true;
5187 switch (statement->kind) {
5188 case STATEMENT_INVALID:
5189 panic("invalid statement found");
5190 case STATEMENT_EMPTY:
5193 case STATEMENT_COMPOUND:
5194 compound_statement_to_firm(&statement->compound);
5196 case STATEMENT_RETURN:
5197 return_statement_to_firm(&statement->returns);
5199 case STATEMENT_EXPRESSION:
5200 expression_statement_to_firm(&statement->expression);
5203 if_statement_to_firm(&statement->ifs);
5205 case STATEMENT_WHILE:
5206 while_statement_to_firm(&statement->whiles);
5208 case STATEMENT_DO_WHILE:
5209 do_while_statement_to_firm(&statement->do_while);
5211 case STATEMENT_DECLARATION:
5212 declaration_statement_to_firm(&statement->declaration);
5214 case STATEMENT_BREAK:
5215 create_jump_statement(statement, get_break_label());
5217 case STATEMENT_CONTINUE:
5218 create_jump_statement(statement, continue_label);
5220 case STATEMENT_SWITCH:
5221 switch_statement_to_firm(&statement->switchs);
5223 case STATEMENT_CASE_LABEL:
5224 case_label_to_firm(&statement->case_label);
5227 for_statement_to_firm(&statement->fors);
5229 case STATEMENT_LABEL:
5230 label_to_firm(&statement->label);
5232 case STATEMENT_GOTO:
5233 goto_to_firm(&statement->gotos);
5236 asm_statement_to_firm(&statement->asms);
5238 case STATEMENT_MS_TRY:
5239 ms_try_statement_to_firm(&statement->ms_try);
5241 case STATEMENT_LEAVE:
5242 leave_statement_to_firm(&statement->leave);
5245 panic("statement not implemented");
5248 static int count_local_variables(const entity_t *entity,
5249 const entity_t *const last)
5252 for (; entity != NULL; entity = entity->base.next) {
5256 if (entity->kind == ENTITY_VARIABLE) {
5257 type = skip_typeref(entity->declaration.type);
5258 address_taken = entity->variable.address_taken;
5259 } else if (entity->kind == ENTITY_PARAMETER) {
5260 type = skip_typeref(entity->declaration.type);
5261 address_taken = entity->parameter.address_taken;
5266 if (!address_taken && is_type_scalar(type))
5275 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5277 int *const count = env;
5279 switch (stmt->kind) {
5280 case STATEMENT_DECLARATION: {
5281 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5282 *count += count_local_variables(decl_stmt->declarations_begin,
5283 decl_stmt->declarations_end);
5288 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5296 static int get_function_n_local_vars(entity_t *entity)
5300 /* count parameters */
5301 count += count_local_variables(entity->function.parameters.entities, NULL);
5303 /* count local variables declared in body */
5304 walk_statements(entity->function.statement, count_local_variables_in_stmt,
5309 static void initialize_function_parameters(entity_t *entity)
5311 assert(entity->kind == ENTITY_FUNCTION);
5312 ir_graph *irg = current_ir_graph;
5313 ir_node *args = get_irg_args(irg);
5314 ir_node *start_block = get_irg_start_block(irg);
5315 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5318 entity_t *parameter = entity->function.parameters.entities;
5319 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5320 assert(parameter->kind == ENTITY_PARAMETER);
5321 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5322 type_t *type = skip_typeref(parameter->declaration.type);
5324 bool needs_entity = parameter->parameter.address_taken;
5325 assert(!is_type_array(type));
5326 if (is_type_compound(type)) {
5327 needs_entity = true;
5331 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5332 ident *id = new_id_from_str(parameter->base.symbol->string);
5333 set_entity_ident(entity, id);
5335 parameter->declaration.kind
5336 = DECLARATION_KIND_PARAMETER_ENTITY;
5337 parameter->parameter.v.entity = entity;
5341 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5342 ir_mode *param_mode = get_type_mode(param_irtype);
5345 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5347 ir_mode *mode = get_ir_mode_storage(type);
5348 value = create_conv(NULL, value, mode);
5349 value = do_strict_conv(NULL, value);
5351 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5352 parameter->parameter.v.value_number = next_value_number_function;
5353 set_irg_loc_description(current_ir_graph, next_value_number_function,
5355 ++next_value_number_function;
5357 set_value(parameter->parameter.v.value_number, value);
5362 * Handle additional decl modifiers for IR-graphs
5364 * @param irg the IR-graph
5365 * @param dec_modifiers additional modifiers
5367 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5369 if (decl_modifiers & DM_RETURNS_TWICE) {
5370 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5371 set_irg_additional_property(irg, mtp_property_returns_twice);
5373 if (decl_modifiers & DM_NORETURN) {
5374 /* TRUE if the declaration includes the Microsoft
5375 __declspec(noreturn) specifier. */
5376 set_irg_additional_property(irg, mtp_property_noreturn);
5378 if (decl_modifiers & DM_NOTHROW) {
5379 /* TRUE if the declaration includes the Microsoft
5380 __declspec(nothrow) specifier. */
5381 set_irg_additional_property(irg, mtp_property_nothrow);
5383 if (decl_modifiers & DM_NAKED) {
5384 /* TRUE if the declaration includes the Microsoft
5385 __declspec(naked) specifier. */
5386 set_irg_additional_property(irg, mtp_property_naked);
5388 if (decl_modifiers & DM_FORCEINLINE) {
5389 /* TRUE if the declaration includes the
5390 Microsoft __forceinline specifier. */
5391 set_irg_inline_property(irg, irg_inline_forced);
5393 if (decl_modifiers & DM_NOINLINE) {
5394 /* TRUE if the declaration includes the Microsoft
5395 __declspec(noinline) specifier. */
5396 set_irg_inline_property(irg, irg_inline_forbidden);
5400 static void add_function_pointer(ir_type *segment, ir_entity *method,
5401 const char *unique_template)
5403 ir_type *method_type = get_entity_type(method);
5404 ident *id = id_unique(unique_template);
5405 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5407 ident *ide = id_unique(unique_template);
5408 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5409 ir_graph *irg = get_const_code_irg();
5410 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5413 set_entity_compiler_generated(ptr, 1);
5414 set_entity_variability(ptr, variability_constant);
5415 set_atomic_ent_value(ptr, val);
5419 * Generate possible IJmp branches to a given label block.
5421 static void gen_ijmp_branches(ir_node *block) {
5423 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5424 add_immBlock_pred(block, ijmp);
5429 * Create code for a function.
5431 static void create_function(entity_t *entity)
5433 assert(entity->kind == ENTITY_FUNCTION);
5434 ir_entity *function_entity = get_function_entity(entity);
5436 if (entity->function.statement == NULL)
5439 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5440 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5441 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5443 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5444 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5445 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5448 current_function_entity = entity;
5449 current_function_name = NULL;
5450 current_funcsig = NULL;
5452 assert(all_labels == NULL);
5453 all_labels = NEW_ARR_F(label_t *, 0);
5456 int n_local_vars = get_function_n_local_vars(entity);
5457 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5459 ir_graph *old_current_function = current_function;
5460 current_function = irg;
5462 set_irg_fp_model(irg, firm_opt.fp_model);
5463 tarval_enable_fp_ops(1);
5464 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5466 ir_node *first_block = get_cur_block();
5468 /* set inline flags */
5469 if (entity->function.is_inline)
5470 set_irg_inline_property(irg, irg_inline_recomended);
5471 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5473 next_value_number_function = 0;
5474 initialize_function_parameters(entity);
5476 statement_to_firm(entity->function.statement);
5478 ir_node *end_block = get_irg_end_block(irg);
5480 /* do we have a return statement yet? */
5481 if (get_cur_block() != NULL) {
5482 type_t *type = skip_typeref(entity->declaration.type);
5483 assert(is_type_function(type));
5484 const function_type_t *func_type = &type->function;
5485 const type_t *return_type
5486 = skip_typeref(func_type->return_type);
5489 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5490 ret = new_Return(get_store(), 0, NULL);
5493 if (is_type_scalar(return_type)) {
5494 mode = get_ir_mode_storage(func_type->return_type);
5500 /* ยง5.1.2.2.3 main implicitly returns 0 */
5501 if (is_main(entity)) {
5502 in[0] = new_Const(get_mode_null(mode));
5504 in[0] = new_Unknown(mode);
5506 ret = new_Return(get_store(), 1, in);
5508 add_immBlock_pred(end_block, ret);
5511 bool has_computed_gotos = false;
5512 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5513 label_t *label = all_labels[i];
5514 if (label->address_taken) {
5515 gen_ijmp_branches(label->block);
5516 has_computed_gotos = true;
5518 mature_immBlock(label->block);
5520 if (has_computed_gotos) {
5521 /* if we have computed goto's in the function, we cannot inline it */
5522 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5523 warningf(&entity->base.source_position,
5524 "function '%Y' can never be inlined because it contains a computed goto",
5525 entity->base.symbol);
5527 set_irg_inline_property(irg, irg_inline_forbidden);
5530 DEL_ARR_F(all_labels);
5533 mature_immBlock(first_block);
5534 mature_immBlock(end_block);
5536 irg_finalize_cons(irg);
5538 /* finalize the frame type */
5539 ir_type *frame_type = get_irg_frame_type(irg);
5540 int n = get_compound_n_members(frame_type);
5543 for (int i = 0; i < n; ++i) {
5544 ir_entity *entity = get_compound_member(frame_type, i);
5545 ir_type *entity_type = get_entity_type(entity);
5547 int align = get_type_alignment_bytes(entity_type);
5548 if (align > align_all)
5552 misalign = offset % align;
5554 offset += align - misalign;
5558 set_entity_offset(entity, offset);
5559 offset += get_type_size_bytes(entity_type);
5561 set_type_size_bytes(frame_type, offset);
5562 set_type_alignment_bytes(frame_type, align_all);
5565 current_function = old_current_function;
5567 /* create inner functions */
5569 for (inner = next_inner_function(); inner != NULL;
5570 inner = next_inner_function()) {
5571 create_function(inner);
5575 static void scope_to_firm(scope_t *scope)
5577 /* first pass: create declarations */
5578 entity_t *entity = scope->entities;
5579 for ( ; entity != NULL; entity = entity->base.next) {
5580 if (entity->base.symbol == NULL)
5583 if (entity->kind == ENTITY_FUNCTION) {
5584 get_function_entity(entity);
5585 } else if (entity->kind == ENTITY_VARIABLE) {
5586 create_global_variable(entity);
5590 /* second pass: create code/initializers */
5591 entity = scope->entities;
5592 for ( ; entity != NULL; entity = entity->base.next) {
5593 if (entity->base.symbol == NULL)
5596 if (entity->kind == ENTITY_FUNCTION) {
5597 create_function(entity);
5598 } else if (entity->kind == ENTITY_VARIABLE) {
5599 assert(entity->declaration.kind
5600 == DECLARATION_KIND_GLOBAL_VARIABLE);
5601 current_ir_graph = get_const_code_irg();
5602 create_variable_initializer(entity);
5607 void init_ast2firm(void)
5609 obstack_init(&asm_obst);
5610 init_atomic_modes();
5612 /* OS option must be set to the backend */
5613 switch (firm_opt.os_support) {
5614 case OS_SUPPORT_MINGW:
5615 create_ld_ident = create_name_win32;
5617 case OS_SUPPORT_LINUX:
5618 create_ld_ident = create_name_linux_elf;
5620 case OS_SUPPORT_MACHO:
5621 create_ld_ident = create_name_macho;
5624 panic("unexpected OS support mode");
5627 /* create idents for all known runtime functions */
5628 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5629 rts_idents[i] = new_id_from_str(rts_data[i].name);
5632 entitymap_init(&entitymap);
5635 static void init_ir_types(void)
5637 static int ir_types_initialized = 0;
5638 if (ir_types_initialized)
5640 ir_types_initialized = 1;
5642 ir_type_int = get_ir_type(type_int);
5643 ir_type_const_char = get_ir_type(type_const_char);
5644 ir_type_wchar_t = get_ir_type(type_wchar_t);
5645 ir_type_void = get_ir_type(type_void);
5647 const backend_params *be_params = be_get_backend_param();
5648 mode_float_arithmetic = be_params->mode_float_arithmetic;
5651 void exit_ast2firm(void)
5653 entitymap_destroy(&entitymap);
5654 obstack_free(&asm_obst, NULL);
5657 static void global_asm_to_firm(statement_t *s)
5659 for (; s != NULL; s = s->base.next) {
5660 assert(s->kind == STATEMENT_ASM);
5662 char const *const text = s->asms.asm_text.begin;
5663 size_t size = s->asms.asm_text.size;
5665 /* skip the last \0 */
5666 if (text[size - 1] == '\0')
5669 ident *const id = new_id_from_chars(text, size);
5674 void translation_unit_to_firm(translation_unit_t *unit)
5676 /* just to be sure */
5677 continue_label = NULL;
5679 current_switch_cond = NULL;
5680 current_translation_unit = unit;
5683 inner_functions = NEW_ARR_F(entity_t *, 0);
5685 scope_to_firm(&unit->scope);
5686 global_asm_to_firm(unit->global_asm);
5688 DEL_ARR_F(inner_functions);
5689 inner_functions = NULL;
5691 current_ir_graph = NULL;
5692 current_translation_unit = NULL;