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 cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1383 ? cons_volatile : 0;
1384 ir_mode *const mode = get_type_mode(irtype);
1385 ir_node *const memory = get_store();
1386 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1387 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1388 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1390 set_store(load_mem);
1392 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1393 return create_conv(dbgi, load_res, mode_arithmetic);
1397 * Creates a strict Conv if neccessary.
1399 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1401 ir_mode *mode = get_irn_mode(node);
1403 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1405 if (!mode_is_float(mode))
1408 /* check if there is already a Conv */
1409 if (is_Conv(node)) {
1410 /* convert it into a strict Conv */
1411 set_Conv_strict(node, 1);
1415 /* otherwise create a new one */
1416 return new_d_strictConv(dbgi, node, mode);
1419 static ir_node *get_global_var_address(dbg_info *const dbgi,
1420 const entity_t *const entity)
1422 assert(entity->kind == ENTITY_VARIABLE);
1423 assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1425 ir_entity *const irentity = entity->variable.v.entity;
1426 if (entity->variable.thread_local) {
1427 ir_node *const no_mem = new_NoMem();
1428 ir_node *const tls = get_irg_tls(current_ir_graph);
1429 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1431 return create_symconst(dbgi, mode_P_data, irentity);
1436 * Returns the correct base address depending on whether it is a parameter or a
1437 * normal local variable.
1439 static ir_node *get_local_frame(ir_entity *const ent)
1441 ir_graph *const irg = current_ir_graph;
1442 const ir_type *const owner = get_entity_owner(ent);
1443 if (owner == get_irg_frame_type(irg)) {
1444 return get_irg_frame(irg);
1446 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1447 return get_irg_value_param_base(irg);
1452 * Keep all memory edges of the given block.
1454 static void keep_all_memory(ir_node *block) {
1455 ir_node *old = get_cur_block();
1457 set_cur_block(block);
1458 keep_alive(get_store());
1459 /* TODO: keep all memory edges from restricted pointers */
1463 static ir_node *reference_expression_enum_value_to_firm(
1464 const reference_expression_t *ref)
1466 entity_t *entity = ref->entity;
1467 type_t *type = skip_typeref(entity->enum_value.enum_type);
1468 /* make sure the type is constructed */
1469 (void) get_ir_type(type);
1471 return new_Const(entity->enum_value.tv);
1474 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1476 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1477 entity_t *entity = ref->entity;
1478 assert(is_declaration(entity));
1479 type_t *type = skip_typeref(entity->declaration.type);
1481 /* make sure the type is constructed */
1482 (void) get_ir_type(type);
1484 switch ((declaration_kind_t) entity->declaration.kind) {
1485 case DECLARATION_KIND_UNKNOWN:
1488 case DECLARATION_KIND_LOCAL_VARIABLE: {
1489 ir_mode *const mode = get_ir_mode_storage(type);
1490 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1491 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1493 case DECLARATION_KIND_PARAMETER: {
1494 ir_mode *const mode = get_ir_mode_storage(type);
1495 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1496 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1498 case DECLARATION_KIND_FUNCTION: {
1499 ir_mode *const mode = get_ir_mode_storage(type);
1500 return create_symconst(dbgi, mode, entity->function.entity);
1502 case DECLARATION_KIND_INNER_FUNCTION: {
1503 ir_mode *const mode = get_ir_mode_storage(type);
1504 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1505 /* inner function not using the closure */
1506 return create_symconst(dbgi, mode, entity->function.entity);
1508 /* TODO: need trampoline here */
1509 panic("Trampoline code not implemented");
1510 return create_symconst(dbgi, mode, entity->function.entity);
1513 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1514 ir_node *const addr = get_global_var_address(dbgi, entity);
1515 return deref_address(dbgi, entity->declaration.type, addr);
1518 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1519 ir_entity *irentity = entity->variable.v.entity;
1520 ir_node *frame = get_local_frame(irentity);
1521 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1522 return deref_address(dbgi, entity->declaration.type, sel);
1524 case DECLARATION_KIND_PARAMETER_ENTITY: {
1525 ir_entity *irentity = entity->parameter.v.entity;
1526 ir_node *frame = get_local_frame(irentity);
1527 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1528 return deref_address(dbgi, entity->declaration.type, sel);
1531 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1532 return entity->variable.v.vla_base;
1534 case DECLARATION_KIND_COMPOUND_MEMBER:
1535 panic("not implemented reference type");
1538 panic("reference to declaration with unknown type found");
1541 static ir_node *reference_addr(const reference_expression_t *ref)
1543 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1544 entity_t *entity = ref->entity;
1545 assert(is_declaration(entity));
1547 switch((declaration_kind_t) entity->declaration.kind) {
1548 case DECLARATION_KIND_UNKNOWN:
1550 case DECLARATION_KIND_PARAMETER:
1551 case DECLARATION_KIND_LOCAL_VARIABLE:
1552 /* you can store to a local variable (so we don't panic but return NULL
1553 * as an indicator for no real address) */
1555 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1556 ir_node *const addr = get_global_var_address(dbgi, entity);
1559 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1560 ir_entity *irentity = entity->variable.v.entity;
1561 ir_node *frame = get_local_frame(irentity);
1562 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1566 case DECLARATION_KIND_PARAMETER_ENTITY: {
1567 ir_entity *irentity = entity->parameter.v.entity;
1568 ir_node *frame = get_local_frame(irentity);
1569 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1574 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1575 return entity->variable.v.vla_base;
1577 case DECLARATION_KIND_FUNCTION: {
1578 type_t *const type = skip_typeref(entity->declaration.type);
1579 ir_mode *const mode = get_ir_mode_storage(type);
1580 return create_symconst(dbgi, mode, entity->function.entity);
1583 case DECLARATION_KIND_INNER_FUNCTION:
1584 case DECLARATION_KIND_COMPOUND_MEMBER:
1585 panic("not implemented reference type");
1588 panic("reference to declaration with unknown type found");
1592 * Transform calls to builtin functions.
1594 static ir_node *process_builtin_call(const call_expression_t *call)
1596 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1598 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1599 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1601 type_t *type = skip_typeref(builtin->base.type);
1602 assert(is_type_pointer(type));
1604 type_t *function_type = skip_typeref(type->pointer.points_to);
1605 symbol_t *symbol = builtin->symbol;
1607 switch(symbol->ID) {
1608 case T___builtin_alloca: {
1609 if (call->arguments == NULL || call->arguments->next != NULL) {
1610 panic("invalid number of parameters on __builtin_alloca");
1612 expression_t *argument = call->arguments->expression;
1613 ir_node *size = expression_to_firm(argument);
1615 ir_node *store = get_store();
1616 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1618 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1620 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1625 case T___builtin_huge_val:
1626 case T___builtin_inf:
1627 case T___builtin_inff:
1628 case T___builtin_infl: {
1629 type_t *type = function_type->function.return_type;
1630 ir_mode *mode = get_ir_mode_arithmetic(type);
1631 tarval *tv = get_mode_infinite(mode);
1632 ir_node *res = new_d_Const(dbgi, tv);
1635 case T___builtin_nan:
1636 case T___builtin_nanf:
1637 case T___builtin_nanl: {
1638 /* Ignore string for now... */
1639 assert(is_type_function(function_type));
1640 type_t *type = function_type->function.return_type;
1641 ir_mode *mode = get_ir_mode_arithmetic(type);
1642 tarval *tv = get_mode_NAN(mode);
1643 ir_node *res = new_d_Const(dbgi, tv);
1646 case T___builtin_expect: {
1647 expression_t *argument = call->arguments->expression;
1648 return _expression_to_firm(argument);
1650 case T___builtin_va_end:
1651 /* evaluate the argument of va_end for its side effects */
1652 _expression_to_firm(call->arguments->expression);
1655 panic("unsupported builtin found");
1660 * Transform a call expression.
1661 * Handles some special cases, like alloca() calls, which must be resolved
1662 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1663 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1666 static ir_node *call_expression_to_firm(const call_expression_t *call)
1668 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1669 assert(get_cur_block() != NULL);
1671 expression_t *function = call->function;
1672 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1673 return process_builtin_call(call);
1675 if (function->kind == EXPR_REFERENCE) {
1676 const reference_expression_t *ref = &function->reference;
1677 entity_t *entity = ref->entity;
1679 if (entity->kind == ENTITY_FUNCTION
1680 && entity->function.entity == rts_entities[rts_alloca]) {
1681 /* handle alloca() call */
1682 expression_t *argument = call->arguments->expression;
1683 ir_node *size = expression_to_firm(argument);
1684 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
1686 size = create_conv(dbgi, size, mode);
1688 ir_node *store = get_store();
1689 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1690 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1692 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1694 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1699 ir_node *callee = expression_to_firm(function);
1701 type_t *type = skip_typeref(function->base.type);
1702 assert(is_type_pointer(type));
1703 pointer_type_t *pointer_type = &type->pointer;
1704 type_t *points_to = skip_typeref(pointer_type->points_to);
1705 assert(is_type_function(points_to));
1706 function_type_t *function_type = &points_to->function;
1708 int n_parameters = 0;
1709 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1710 ir_type *new_method_type = NULL;
1711 if (function_type->variadic || function_type->unspecified_parameters) {
1712 const call_argument_t *argument = call->arguments;
1713 for ( ; argument != NULL; argument = argument->next) {
1717 /* we need to construct a new method type matching the call
1719 int n_res = get_method_n_ress(ir_method_type);
1720 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1721 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1722 n_parameters, n_res, dbgi);
1723 set_method_calling_convention(new_method_type,
1724 get_method_calling_convention(ir_method_type));
1725 set_method_additional_properties(new_method_type,
1726 get_method_additional_properties(ir_method_type));
1727 set_method_variadicity(new_method_type,
1728 get_method_variadicity(ir_method_type));
1730 for (int i = 0; i < n_res; ++i) {
1731 set_method_res_type(new_method_type, i,
1732 get_method_res_type(ir_method_type, i));
1734 argument = call->arguments;
1735 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1736 expression_t *expression = argument->expression;
1737 ir_type *irtype = get_ir_type(expression->base.type);
1738 set_method_param_type(new_method_type, i, irtype);
1740 ir_method_type = new_method_type;
1742 n_parameters = get_method_n_params(ir_method_type);
1745 ir_node *in[n_parameters];
1747 const call_argument_t *argument = call->arguments;
1748 for (int n = 0; n < n_parameters; ++n) {
1749 expression_t *expression = argument->expression;
1750 ir_node *arg_node = expression_to_firm(expression);
1752 type_t *type = skip_typeref(expression->base.type);
1753 if (!is_type_compound(type)) {
1754 ir_mode *mode = get_ir_mode_storage(expression->base.type);
1755 arg_node = create_conv(dbgi, arg_node, mode);
1756 arg_node = do_strict_conv(dbgi, arg_node);
1761 argument = argument->next;
1764 ir_node *store = get_store();
1765 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1767 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1770 type_t *return_type = skip_typeref(function_type->return_type);
1771 ir_node *result = NULL;
1773 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1774 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1776 if (is_type_scalar(return_type)) {
1777 ir_mode *mode = get_ir_mode_storage(return_type);
1778 result = new_d_Proj(dbgi, resproj, mode, 0);
1779 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1780 result = create_conv(NULL, result, mode_arith);
1782 ir_mode *mode = mode_P_data;
1783 result = new_d_Proj(dbgi, resproj, mode, 0);
1787 if (function->kind == EXPR_REFERENCE &&
1788 function->reference.entity->declaration.modifiers & DM_NORETURN) {
1789 /* A dead end: Keep the Call and the Block. Also place all further
1790 * nodes into a new and unreachable block. */
1792 keep_alive(get_cur_block());
1799 static void statement_to_firm(statement_t *statement);
1800 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1802 static ir_node *expression_to_addr(const expression_t *expression);
1803 static ir_node *create_condition_evaluation(const expression_t *expression,
1804 ir_node *true_block,
1805 ir_node *false_block);
1807 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1810 if (!is_type_compound(type)) {
1811 ir_mode *mode = get_ir_mode_storage(type);
1812 value = create_conv(dbgi, value, mode);
1813 value = do_strict_conv(dbgi, value);
1816 ir_node *memory = get_store();
1818 if (is_type_scalar(type)) {
1819 cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1820 ? cons_volatile : 0;
1821 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1822 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1823 set_store(store_mem);
1825 ir_type *irtype = get_ir_type(type);
1826 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1827 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1828 set_store(copyb_mem);
1832 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1834 tarval *all_one = get_mode_all_one(mode);
1835 int mode_size = get_mode_size_bits(mode);
1837 assert(offset >= 0);
1839 assert(offset + size <= mode_size);
1840 if (size == mode_size) {
1844 long shiftr = get_mode_size_bits(mode) - size;
1845 long shiftl = offset;
1846 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1847 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1848 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1849 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1854 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1855 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1857 ir_type *entity_type = get_entity_type(entity);
1858 ir_type *base_type = get_primitive_base_type(entity_type);
1859 assert(base_type != NULL);
1860 ir_mode *mode = get_type_mode(base_type);
1862 value = create_conv(dbgi, value, mode);
1864 /* kill upper bits of value and shift to right position */
1865 int bitoffset = get_entity_offset_bits_remainder(entity);
1866 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1868 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1869 ir_node *mask_node = new_d_Const(dbgi, mask);
1870 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1871 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1872 ir_node *shiftcount = new_d_Const(dbgi, shiftl);
1873 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1875 /* load current value */
1876 ir_node *mem = get_store();
1877 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1878 set_volatile ? cons_volatile : 0);
1879 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1880 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1881 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1882 tarval *inv_mask = tarval_not(shift_mask);
1883 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1884 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1886 /* construct new value and store */
1887 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1888 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1889 set_volatile ? cons_volatile : 0);
1890 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1891 set_store(store_mem);
1893 return value_masked;
1896 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1899 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1900 type_t *type = expression->base.type;
1901 ir_mode *mode = get_ir_mode_storage(type);
1902 ir_node *mem = get_store();
1903 ir_node *load = new_d_Load(dbgi, mem, addr, mode, 0);
1904 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1905 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1907 load_res = create_conv(dbgi, load_res, mode_int);
1909 set_store(load_mem);
1911 /* kill upper bits */
1912 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1913 ir_entity *entity = expression->compound_entry->compound_member.entity;
1914 int bitoffset = get_entity_offset_bits_remainder(entity);
1915 ir_type *entity_type = get_entity_type(entity);
1916 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1917 long shift_bitsl = machine_size - bitoffset - bitsize;
1918 assert(shift_bitsl >= 0);
1919 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1920 ir_node *countl = new_d_Const(dbgi, tvl);
1921 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1923 long shift_bitsr = bitoffset + shift_bitsl;
1924 assert(shift_bitsr <= (long) machine_size);
1925 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1926 ir_node *countr = new_d_Const(dbgi, tvr);
1928 if (mode_is_signed(mode)) {
1929 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1931 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1934 return create_conv(dbgi, shiftr, mode);
1937 /* make sure the selected compound type is constructed */
1938 static void construct_select_compound(const select_expression_t *expression)
1940 type_t *type = skip_typeref(expression->compound->base.type);
1941 if (is_type_pointer(type)) {
1942 type = type->pointer.points_to;
1944 (void) get_ir_type(type);
1947 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1948 ir_node *value, ir_node *addr)
1950 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1951 type_t *type = skip_typeref(expression->base.type);
1953 if (!is_type_compound(type)) {
1954 ir_mode *mode = get_ir_mode_storage(type);
1955 value = create_conv(dbgi, value, mode);
1956 value = do_strict_conv(dbgi, value);
1959 if (expression->kind == EXPR_REFERENCE) {
1960 const reference_expression_t *ref = &expression->reference;
1962 entity_t *entity = ref->entity;
1963 assert(is_declaration(entity));
1964 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1965 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1966 set_value(entity->variable.v.value_number, value);
1968 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1969 set_value(entity->parameter.v.value_number, value);
1975 addr = expression_to_addr(expression);
1976 assert(addr != NULL);
1978 if (expression->kind == EXPR_SELECT) {
1979 const select_expression_t *select = &expression->select;
1981 construct_select_compound(select);
1983 entity_t *entity = select->compound_entry;
1984 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1985 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1986 ir_entity *irentity = entity->compound_member.entity;
1988 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1989 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
1995 assign_value(dbgi, addr, type, value);
1999 static void set_value_for_expression(const expression_t *expression,
2002 set_value_for_expression_addr(expression, value, NULL);
2005 static ir_node *get_value_from_lvalue(const expression_t *expression,
2008 if (expression->kind == EXPR_REFERENCE) {
2009 const reference_expression_t *ref = &expression->reference;
2011 entity_t *entity = ref->entity;
2012 assert(entity->kind == ENTITY_VARIABLE
2013 || entity->kind == ENTITY_PARAMETER);
2014 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2016 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2017 value_number = entity->variable.v.value_number;
2018 assert(addr == NULL);
2019 type_t *type = skip_typeref(expression->base.type);
2020 ir_mode *mode = get_ir_mode_storage(type);
2021 ir_node *res = get_value(value_number, mode);
2022 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2023 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2024 value_number = entity->parameter.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));
2033 assert(addr != NULL);
2034 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2037 if (expression->kind == EXPR_SELECT &&
2038 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2039 construct_select_compound(&expression->select);
2040 value = bitfield_extract_to_firm(&expression->select, addr);
2042 value = deref_address(dbgi, expression->base.type, addr);
2049 static ir_node *create_incdec(const unary_expression_t *expression)
2051 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2052 const expression_t *value_expr = expression->value;
2053 ir_node *addr = expression_to_addr(value_expr);
2054 ir_node *value = get_value_from_lvalue(value_expr, addr);
2056 type_t *type = skip_typeref(expression->base.type);
2057 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2060 if (is_type_pointer(type)) {
2061 pointer_type_t *pointer_type = &type->pointer;
2062 offset = get_type_size(pointer_type->points_to);
2064 assert(is_type_arithmetic(type));
2065 offset = new_Const(get_mode_one(mode));
2069 ir_node *store_value;
2070 switch(expression->base.kind) {
2071 case EXPR_UNARY_POSTFIX_INCREMENT:
2073 store_value = new_d_Add(dbgi, value, offset, mode);
2075 case EXPR_UNARY_POSTFIX_DECREMENT:
2077 store_value = new_d_Sub(dbgi, value, offset, mode);
2079 case EXPR_UNARY_PREFIX_INCREMENT:
2080 result = new_d_Add(dbgi, value, offset, mode);
2081 store_value = result;
2083 case EXPR_UNARY_PREFIX_DECREMENT:
2084 result = new_d_Sub(dbgi, value, offset, mode);
2085 store_value = result;
2088 panic("no incdec expr in create_incdec");
2091 set_value_for_expression_addr(value_expr, store_value, addr);
2096 static bool is_local_variable(expression_t *expression)
2098 if (expression->kind != EXPR_REFERENCE)
2100 reference_expression_t *ref_expr = &expression->reference;
2101 entity_t *entity = ref_expr->entity;
2102 if (entity->kind != ENTITY_VARIABLE)
2104 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2105 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2108 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2111 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2112 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2113 case EXPR_BINARY_NOTEQUAL:
2114 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2115 case EXPR_BINARY_ISLESS:
2116 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2117 case EXPR_BINARY_ISLESSEQUAL:
2118 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2119 case EXPR_BINARY_ISGREATER:
2120 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2121 case EXPR_BINARY_ISGREATEREQUAL:
2122 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2123 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2128 panic("trying to get pn_Cmp from non-comparison binexpr type");
2132 * Handle the assume optimizer hint: check if a Confirm
2133 * node can be created.
2135 * @param dbi debug info
2136 * @param expr the IL assume expression
2138 * we support here only some simple cases:
2143 static ir_node *handle_assume_compare(dbg_info *dbi,
2144 const binary_expression_t *expression)
2146 expression_t *op1 = expression->left;
2147 expression_t *op2 = expression->right;
2148 entity_t *var2, *var = NULL;
2149 ir_node *res = NULL;
2152 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2154 if (is_local_variable(op1) && is_local_variable(op2)) {
2155 var = op1->reference.entity;
2156 var2 = op2->reference.entity;
2158 type_t *const type = skip_typeref(var->declaration.type);
2159 ir_mode *const mode = get_ir_mode_storage(type);
2161 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2162 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2164 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2165 set_value(var2->variable.v.value_number, res);
2167 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2168 set_value(var->variable.v.value_number, res);
2174 if (is_local_variable(op1) && is_constant_expression(op2)) {
2175 var = op1->reference.entity;
2177 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2178 cmp_val = get_inversed_pnc(cmp_val);
2179 var = op2->reference.entity;
2184 type_t *const type = skip_typeref(var->declaration.type);
2185 ir_mode *const mode = get_ir_mode_storage(type);
2187 res = get_value(var->variable.v.value_number, mode);
2188 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2189 set_value(var->variable.v.value_number, res);
2195 * Handle the assume optimizer hint.
2197 * @param dbi debug info
2198 * @param expr the IL assume expression
2200 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2201 switch(expression->kind) {
2202 case EXPR_BINARY_EQUAL:
2203 case EXPR_BINARY_NOTEQUAL:
2204 case EXPR_BINARY_LESS:
2205 case EXPR_BINARY_LESSEQUAL:
2206 case EXPR_BINARY_GREATER:
2207 case EXPR_BINARY_GREATEREQUAL:
2208 return handle_assume_compare(dbi, &expression->binary);
2214 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2216 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2217 type_t *type = skip_typeref(expression->base.type);
2219 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2220 return expression_to_addr(expression->value);
2222 const expression_t *value = expression->value;
2224 switch(expression->base.kind) {
2225 case EXPR_UNARY_NEGATE: {
2226 ir_node *value_node = expression_to_firm(value);
2227 ir_mode *mode = get_ir_mode_arithmetic(type);
2228 return new_d_Minus(dbgi, value_node, mode);
2230 case EXPR_UNARY_PLUS:
2231 return expression_to_firm(value);
2232 case EXPR_UNARY_BITWISE_NEGATE: {
2233 ir_node *value_node = expression_to_firm(value);
2234 ir_mode *mode = get_ir_mode_arithmetic(type);
2235 return new_d_Not(dbgi, value_node, mode);
2237 case EXPR_UNARY_NOT: {
2238 ir_node *value_node = _expression_to_firm(value);
2239 value_node = create_conv(dbgi, value_node, mode_b);
2240 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2243 case EXPR_UNARY_DEREFERENCE: {
2244 ir_node *value_node = expression_to_firm(value);
2245 type_t *value_type = skip_typeref(value->base.type);
2246 assert(is_type_pointer(value_type));
2247 type_t *points_to = value_type->pointer.points_to;
2248 return deref_address(dbgi, points_to, value_node);
2250 case EXPR_UNARY_POSTFIX_INCREMENT:
2251 case EXPR_UNARY_POSTFIX_DECREMENT:
2252 case EXPR_UNARY_PREFIX_INCREMENT:
2253 case EXPR_UNARY_PREFIX_DECREMENT:
2254 return create_incdec(expression);
2255 case EXPR_UNARY_CAST: {
2256 ir_node *value_node = expression_to_firm(value);
2257 if (is_type_scalar(type)) {
2258 ir_mode *mode = get_ir_mode_storage(type);
2259 ir_node *node = create_conv(dbgi, value_node, mode);
2260 node = do_strict_conv(dbgi, node);
2261 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2262 node = create_conv(dbgi, node, mode_arith);
2265 /* make sure firm type is constructed */
2266 (void) get_ir_type(type);
2270 case EXPR_UNARY_CAST_IMPLICIT: {
2271 ir_node *value_node = expression_to_firm(value);
2272 if (is_type_scalar(type)) {
2273 ir_mode *mode = get_ir_mode_storage(type);
2274 ir_node *res = create_conv(dbgi, value_node, mode);
2275 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2276 res = create_conv(dbgi, res, mode_arith);
2282 case EXPR_UNARY_ASSUME:
2283 if (firm_opt.confirm)
2284 return handle_assume(dbgi, value);
2291 panic("invalid UNEXPR type found");
2295 * produces a 0/1 depending of the value of a mode_b node
2297 static ir_node *produce_condition_result(const expression_t *expression,
2298 ir_mode *mode, dbg_info *dbgi)
2300 ir_node *cur_block = get_cur_block();
2302 ir_node *one_block = new_immBlock();
2303 set_cur_block(one_block);
2304 ir_node *one = new_Const(get_mode_one(mode));
2305 ir_node *jmp_one = new_d_Jmp(dbgi);
2307 ir_node *zero_block = new_immBlock();
2308 set_cur_block(zero_block);
2309 ir_node *zero = new_Const(get_mode_null(mode));
2310 ir_node *jmp_zero = new_d_Jmp(dbgi);
2312 set_cur_block(cur_block);
2313 create_condition_evaluation(expression, one_block, zero_block);
2314 mature_immBlock(one_block);
2315 mature_immBlock(zero_block);
2317 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2318 new_Block(2, in_cf);
2320 ir_node *in[2] = { one, zero };
2321 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2326 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2327 ir_node *value, type_t *type)
2329 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2330 assert(is_type_pointer(type));
2331 pointer_type_t *const pointer_type = &type->pointer;
2332 type_t *const points_to = skip_typeref(pointer_type->points_to);
2333 unsigned elem_size = get_type_size_const(points_to);
2335 value = create_conv(dbgi, value, mode);
2337 /* gcc extension: allow arithmetic with void * and function * */
2338 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2339 is_type_function(points_to)) {
2343 assert(elem_size >= 1);
2347 ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2348 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode);
2352 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2353 ir_node *left, ir_node *right)
2356 type_t *type_left = skip_typeref(expression->left->base.type);
2357 type_t *type_right = skip_typeref(expression->right->base.type);
2359 expression_kind_t kind = expression->base.kind;
2362 case EXPR_BINARY_SHIFTLEFT:
2363 case EXPR_BINARY_SHIFTRIGHT:
2364 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2365 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2366 mode = get_irn_mode(left);
2367 right = create_conv(dbgi, right, mode_uint);
2370 case EXPR_BINARY_SUB:
2371 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2372 const pointer_type_t *const ptr_type = &type_left->pointer;
2374 mode = get_ir_mode_arithmetic(expression->base.type);
2375 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2376 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2377 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2378 ir_node *const no_mem = new_NoMem();
2379 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2380 mode, op_pin_state_floats);
2381 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2384 case EXPR_BINARY_SUB_ASSIGN:
2385 if (is_type_pointer(type_left)) {
2386 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2387 mode = get_ir_mode_arithmetic(type_left);
2392 case EXPR_BINARY_ADD:
2393 case EXPR_BINARY_ADD_ASSIGN:
2394 if (is_type_pointer(type_left)) {
2395 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2396 mode = get_ir_mode_arithmetic(type_left);
2398 } else if (is_type_pointer(type_right)) {
2399 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2400 mode = get_ir_mode_arithmetic(type_right);
2407 mode = get_ir_mode_arithmetic(type_right);
2408 left = create_conv(dbgi, left, mode);
2413 case EXPR_BINARY_ADD_ASSIGN:
2414 case EXPR_BINARY_ADD:
2415 return new_d_Add(dbgi, left, right, mode);
2416 case EXPR_BINARY_SUB_ASSIGN:
2417 case EXPR_BINARY_SUB:
2418 return new_d_Sub(dbgi, left, right, mode);
2419 case EXPR_BINARY_MUL_ASSIGN:
2420 case EXPR_BINARY_MUL:
2421 return new_d_Mul(dbgi, left, right, mode);
2422 case EXPR_BINARY_BITWISE_AND:
2423 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2424 return new_d_And(dbgi, left, right, mode);
2425 case EXPR_BINARY_BITWISE_OR:
2426 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2427 return new_d_Or(dbgi, left, right, mode);
2428 case EXPR_BINARY_BITWISE_XOR:
2429 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2430 return new_d_Eor(dbgi, left, right, mode);
2431 case EXPR_BINARY_SHIFTLEFT:
2432 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2433 return new_d_Shl(dbgi, left, right, mode);
2434 case EXPR_BINARY_SHIFTRIGHT:
2435 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2436 if (mode_is_signed(mode)) {
2437 return new_d_Shrs(dbgi, left, right, mode);
2439 return new_d_Shr(dbgi, left, right, mode);
2441 case EXPR_BINARY_DIV:
2442 case EXPR_BINARY_DIV_ASSIGN: {
2443 ir_node *pin = new_Pin(new_NoMem());
2446 if (mode_is_float(mode)) {
2447 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2448 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2450 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2451 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2455 case EXPR_BINARY_MOD:
2456 case EXPR_BINARY_MOD_ASSIGN: {
2457 ir_node *pin = new_Pin(new_NoMem());
2458 assert(!mode_is_float(mode));
2459 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2460 op_pin_state_floats);
2461 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2465 panic("unexpected expression kind");
2469 static ir_node *create_lazy_op(const binary_expression_t *expression)
2471 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2472 type_t *type = skip_typeref(expression->base.type);
2473 ir_mode *mode = get_ir_mode_arithmetic(type);
2475 if (is_constant_expression(expression->left)) {
2476 long val = fold_constant(expression->left);
2477 expression_kind_t ekind = expression->base.kind;
2478 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2479 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2481 return new_Const(get_mode_null(mode));
2485 return new_Const(get_mode_one(mode));
2489 if (is_constant_expression(expression->right)) {
2490 long const valr = fold_constant(expression->right);
2492 new_Const(get_mode_one(mode)) :
2493 new_Const(get_mode_null(mode));
2496 return produce_condition_result(expression->right, mode, dbgi);
2499 return produce_condition_result((const expression_t*) expression, mode,
2503 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2504 ir_node *right, ir_mode *mode);
2506 static ir_node *create_assign_binop(const binary_expression_t *expression)
2508 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2509 const expression_t *left_expr = expression->left;
2510 type_t *type = skip_typeref(left_expr->base.type);
2511 ir_mode *left_mode = get_ir_mode_storage(type);
2512 ir_node *right = expression_to_firm(expression->right);
2513 ir_node *left_addr = expression_to_addr(left_expr);
2514 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2515 ir_node *result = create_op(dbgi, expression, left, right);
2517 result = create_conv(dbgi, result, left_mode);
2518 result = do_strict_conv(dbgi, result);
2520 result = set_value_for_expression_addr(left_expr, result, left_addr);
2522 if (!is_type_compound(type)) {
2523 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2524 result = create_conv(dbgi, result, mode_arithmetic);
2529 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2531 expression_kind_t kind = expression->base.kind;
2534 case EXPR_BINARY_EQUAL:
2535 case EXPR_BINARY_NOTEQUAL:
2536 case EXPR_BINARY_LESS:
2537 case EXPR_BINARY_LESSEQUAL:
2538 case EXPR_BINARY_GREATER:
2539 case EXPR_BINARY_GREATEREQUAL:
2540 case EXPR_BINARY_ISGREATER:
2541 case EXPR_BINARY_ISGREATEREQUAL:
2542 case EXPR_BINARY_ISLESS:
2543 case EXPR_BINARY_ISLESSEQUAL:
2544 case EXPR_BINARY_ISLESSGREATER:
2545 case EXPR_BINARY_ISUNORDERED: {
2546 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2547 ir_node *left = expression_to_firm(expression->left);
2548 ir_node *right = expression_to_firm(expression->right);
2549 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2550 long pnc = get_pnc(kind, expression->left->base.type);
2551 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2554 case EXPR_BINARY_ASSIGN: {
2555 ir_node *addr = expression_to_addr(expression->left);
2556 ir_node *right = expression_to_firm(expression->right);
2558 = set_value_for_expression_addr(expression->left, right, addr);
2560 type_t *type = skip_typeref(expression->base.type);
2561 if (!is_type_compound(type)) {
2562 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2563 res = create_conv(NULL, res, mode_arithmetic);
2567 case EXPR_BINARY_ADD:
2568 case EXPR_BINARY_SUB:
2569 case EXPR_BINARY_MUL:
2570 case EXPR_BINARY_DIV:
2571 case EXPR_BINARY_MOD:
2572 case EXPR_BINARY_BITWISE_AND:
2573 case EXPR_BINARY_BITWISE_OR:
2574 case EXPR_BINARY_BITWISE_XOR:
2575 case EXPR_BINARY_SHIFTLEFT:
2576 case EXPR_BINARY_SHIFTRIGHT:
2578 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2579 ir_node *left = expression_to_firm(expression->left);
2580 ir_node *right = expression_to_firm(expression->right);
2581 return create_op(dbgi, expression, left, right);
2583 case EXPR_BINARY_LOGICAL_AND:
2584 case EXPR_BINARY_LOGICAL_OR:
2585 return create_lazy_op(expression);
2586 case EXPR_BINARY_COMMA:
2587 /* create side effects of left side */
2588 (void) expression_to_firm(expression->left);
2589 return _expression_to_firm(expression->right);
2591 case EXPR_BINARY_ADD_ASSIGN:
2592 case EXPR_BINARY_SUB_ASSIGN:
2593 case EXPR_BINARY_MUL_ASSIGN:
2594 case EXPR_BINARY_MOD_ASSIGN:
2595 case EXPR_BINARY_DIV_ASSIGN:
2596 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2597 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2598 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2599 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2600 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2601 return create_assign_binop(expression);
2603 panic("TODO binexpr type");
2607 static ir_node *array_access_addr(const array_access_expression_t *expression)
2609 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2610 ir_node *base_addr = expression_to_firm(expression->array_ref);
2611 ir_node *offset = expression_to_firm(expression->index);
2612 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2613 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2614 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2619 static ir_node *array_access_to_firm(
2620 const array_access_expression_t *expression)
2622 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2623 ir_node *addr = array_access_addr(expression);
2624 type_t *type = revert_automatic_type_conversion(
2625 (const expression_t*) expression);
2626 type = skip_typeref(type);
2628 return deref_address(dbgi, type, addr);
2631 static long get_offsetof_offset(const offsetof_expression_t *expression)
2633 type_t *orig_type = expression->type;
2636 designator_t *designator = expression->designator;
2637 for ( ; designator != NULL; designator = designator->next) {
2638 type_t *type = skip_typeref(orig_type);
2639 /* be sure the type is constructed */
2640 (void) get_ir_type(type);
2642 if (designator->symbol != NULL) {
2643 assert(is_type_compound(type));
2644 symbol_t *symbol = designator->symbol;
2646 compound_t *compound = type->compound.compound;
2647 entity_t *iter = compound->members.entities;
2648 for ( ; iter != NULL; iter = iter->base.next) {
2649 if (iter->base.symbol == symbol) {
2653 assert(iter != NULL);
2655 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2656 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2657 offset += get_entity_offset(iter->compound_member.entity);
2659 orig_type = iter->declaration.type;
2661 expression_t *array_index = designator->array_index;
2662 assert(designator->array_index != NULL);
2663 assert(is_type_array(type));
2665 long index = fold_constant(array_index);
2666 ir_type *arr_type = get_ir_type(type);
2667 ir_type *elem_type = get_array_element_type(arr_type);
2668 long elem_size = get_type_size_bytes(elem_type);
2670 offset += index * elem_size;
2672 orig_type = type->array.element_type;
2679 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2681 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2682 long offset = get_offsetof_offset(expression);
2683 tarval *tv = new_tarval_from_long(offset, mode);
2684 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2686 return new_d_Const(dbgi, tv);
2689 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2690 ir_entity *entity, type_t *type);
2692 static ir_node *compound_literal_to_firm(
2693 const compound_literal_expression_t *expression)
2695 type_t *type = expression->type;
2697 /* create an entity on the stack */
2698 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2700 ident *const id = id_unique("CompLit.%u");
2701 ir_type *const irtype = get_ir_type(type);
2702 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2703 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2704 set_entity_ld_ident(entity, id);
2706 set_entity_variability(entity, variability_uninitialized);
2708 /* create initialisation code */
2709 initializer_t *initializer = expression->initializer;
2710 create_local_initializer(initializer, dbgi, entity, type);
2712 /* create a sel for the compound literal address */
2713 ir_node *frame = get_local_frame(entity);
2714 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2719 * Transform a sizeof expression into Firm code.
2721 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2723 type_t *type = expression->type;
2725 type = expression->tp_expression->base.type;
2726 assert(type != NULL);
2729 type = skip_typeref(type);
2730 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2731 if (is_type_array(type) && type->array.is_vla
2732 && expression->tp_expression != NULL) {
2733 expression_to_firm(expression->tp_expression);
2736 return get_type_size(type);
2740 * Transform an alignof expression into Firm code.
2742 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2744 type_t *type = expression->type;
2746 /* beware: if expression is a variable reference, return the
2747 alignment of the variable. */
2748 const expression_t *tp_expression = expression->tp_expression;
2749 const entity_t *entity = expression_is_variable(tp_expression);
2750 if (entity != NULL) {
2751 /* TODO: get the alignment of this variable. */
2754 type = tp_expression->base.type;
2755 assert(type != NULL);
2758 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2759 symconst_symbol sym;
2760 sym.type_p = get_ir_type(type);
2761 return new_SymConst(mode, sym, symconst_type_align);
2764 static void init_ir_types(void);
2766 long fold_constant(const expression_t *expression)
2768 assert(is_type_valid(skip_typeref(expression->base.type)));
2770 bool constant_folding_old = constant_folding;
2771 constant_folding = true;
2775 assert(is_constant_expression(expression));
2777 ir_graph *old_current_ir_graph = current_ir_graph;
2778 if (current_ir_graph == NULL) {
2779 current_ir_graph = get_const_code_irg();
2782 ir_node *cnst = expression_to_firm(expression);
2783 current_ir_graph = old_current_ir_graph;
2785 if (!is_Const(cnst)) {
2786 panic("couldn't fold constant");
2789 tarval *tv = get_Const_tarval(cnst);
2790 if (!tarval_is_long(tv)) {
2791 panic("result of constant folding is not integer");
2794 constant_folding = constant_folding_old;
2796 return get_tarval_long(tv);
2799 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2801 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2803 /* first try to fold a constant condition */
2804 if (is_constant_expression(expression->condition)) {
2805 long val = fold_constant(expression->condition);
2807 expression_t *true_expression = expression->true_expression;
2808 if (true_expression == NULL)
2809 true_expression = expression->condition;
2810 return expression_to_firm(true_expression);
2812 return expression_to_firm(expression->false_expression);
2816 ir_node *cur_block = get_cur_block();
2818 /* create the true block */
2819 ir_node *true_block = new_immBlock();
2820 set_cur_block(true_block);
2822 ir_node *true_val = expression->true_expression != NULL ?
2823 expression_to_firm(expression->true_expression) : NULL;
2824 ir_node *true_jmp = new_Jmp();
2826 /* create the false block */
2827 ir_node *false_block = new_immBlock();
2828 set_cur_block(false_block);
2830 ir_node *false_val = expression_to_firm(expression->false_expression);
2831 ir_node *false_jmp = new_Jmp();
2833 /* create the condition evaluation */
2834 set_cur_block(cur_block);
2835 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2836 if (expression->true_expression == NULL) {
2837 if (cond_expr != NULL) {
2838 true_val = cond_expr;
2840 /* Condition ended with a short circuit (&&, ||, !) operation.
2841 * Generate a "1" as value for the true branch. */
2842 true_val = new_Const(get_mode_one(mode_Is));
2845 mature_immBlock(true_block);
2846 mature_immBlock(false_block);
2848 /* create the common block */
2849 ir_node *in_cf[2] = { true_jmp, false_jmp };
2850 new_Block(2, in_cf);
2852 /* TODO improve static semantics, so either both or no values are NULL */
2853 if (true_val == NULL || false_val == NULL)
2856 ir_node *in[2] = { true_val, false_val };
2857 ir_mode *mode = get_irn_mode(true_val);
2858 assert(get_irn_mode(false_val) == mode);
2859 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2865 * Returns an IR-node representing the address of a field.
2867 static ir_node *select_addr(const select_expression_t *expression)
2869 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2871 construct_select_compound(expression);
2873 ir_node *compound_addr = expression_to_firm(expression->compound);
2875 entity_t *entry = expression->compound_entry;
2876 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2877 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2879 if (constant_folding) {
2880 ir_mode *mode = get_irn_mode(compound_addr);
2881 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2882 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2883 return new_d_Add(dbgi, compound_addr, ofs, mode);
2885 ir_entity *irentity = entry->compound_member.entity;
2886 assert(irentity != NULL);
2887 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2891 static ir_node *select_to_firm(const select_expression_t *expression)
2893 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2894 ir_node *addr = select_addr(expression);
2895 type_t *type = revert_automatic_type_conversion(
2896 (const expression_t*) expression);
2897 type = skip_typeref(type);
2899 entity_t *entry = expression->compound_entry;
2900 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2901 type_t *entry_type = skip_typeref(entry->declaration.type);
2903 if (entry_type->kind == TYPE_BITFIELD) {
2904 return bitfield_extract_to_firm(expression, addr);
2907 return deref_address(dbgi, type, addr);
2910 /* Values returned by __builtin_classify_type. */
2911 typedef enum gcc_type_class
2917 enumeral_type_class,
2920 reference_type_class,
2924 function_type_class,
2935 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2937 type_t *type = expr->type_expression->base.type;
2939 /* FIXME gcc returns different values depending on whether compiling C or C++
2940 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2943 type = skip_typeref(type);
2944 switch (type->kind) {
2946 const atomic_type_t *const atomic_type = &type->atomic;
2947 switch (atomic_type->akind) {
2948 /* should not be reached */
2949 case ATOMIC_TYPE_INVALID:
2953 /* gcc cannot do that */
2954 case ATOMIC_TYPE_VOID:
2955 tc = void_type_class;
2958 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2959 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2960 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2961 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2962 case ATOMIC_TYPE_SHORT:
2963 case ATOMIC_TYPE_USHORT:
2964 case ATOMIC_TYPE_INT:
2965 case ATOMIC_TYPE_UINT:
2966 case ATOMIC_TYPE_LONG:
2967 case ATOMIC_TYPE_ULONG:
2968 case ATOMIC_TYPE_LONGLONG:
2969 case ATOMIC_TYPE_ULONGLONG:
2970 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2971 tc = integer_type_class;
2974 case ATOMIC_TYPE_FLOAT:
2975 case ATOMIC_TYPE_DOUBLE:
2976 case ATOMIC_TYPE_LONG_DOUBLE:
2977 tc = real_type_class;
2980 panic("Unexpected atomic type in classify_type_to_firm().");
2983 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
2984 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
2985 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
2986 case TYPE_ARRAY: /* gcc handles this as pointer */
2987 case TYPE_FUNCTION: /* gcc handles this as pointer */
2988 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
2989 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
2990 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
2992 /* gcc handles this as integer */
2993 case TYPE_ENUM: tc = integer_type_class; goto make_const;
2995 /* gcc classifies the referenced type */
2996 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
2999 /* typedef/typeof should be skipped already */
3006 panic("unexpected TYPE classify_type_to_firm().");
3010 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3011 tarval *const tv = new_tarval_from_long(tc, mode_int);
3012 return new_d_Const(dbgi, tv);
3015 static ir_node *function_name_to_firm(
3016 const funcname_expression_t *const expr)
3018 switch(expr->kind) {
3019 case FUNCNAME_FUNCTION:
3020 case FUNCNAME_PRETTY_FUNCTION:
3021 case FUNCNAME_FUNCDNAME:
3022 if (current_function_name == NULL) {
3023 const source_position_t *const src_pos = &expr->base.source_position;
3024 const char *name = current_function_entity->base.symbol->string;
3025 const string_t string = { name, strlen(name) + 1 };
3026 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3028 return current_function_name;
3029 case FUNCNAME_FUNCSIG:
3030 if (current_funcsig == NULL) {
3031 const source_position_t *const src_pos = &expr->base.source_position;
3032 ir_entity *ent = get_irg_entity(current_ir_graph);
3033 const char *const name = get_entity_ld_name(ent);
3034 const string_t string = { name, strlen(name) + 1 };
3035 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3037 return current_funcsig;
3039 panic("Unsupported function name");
3042 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3044 statement_t *statement = expr->statement;
3046 assert(statement->kind == STATEMENT_COMPOUND);
3047 return compound_statement_to_firm(&statement->compound);
3050 static ir_node *va_start_expression_to_firm(
3051 const va_start_expression_t *const expr)
3053 type_t *const type = current_function_entity->declaration.type;
3054 ir_type *const method_type = get_ir_type(type);
3055 int const n = get_method_n_params(method_type) - 1;
3056 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
3057 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
3058 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3059 ir_node *const no_mem = new_NoMem();
3060 ir_node *const arg_sel =
3061 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3063 ir_node *const cnst = get_type_size(expr->parameter->base.type);
3064 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3065 set_value_for_expression(expr->ap, add);
3070 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3072 type_t *const type = expr->base.type;
3073 expression_t *const ap_expr = expr->ap;
3074 ir_node *const ap_addr = expression_to_addr(ap_expr);
3075 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3076 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3077 ir_node *const res = deref_address(dbgi, type, ap);
3079 ir_node *const cnst = get_type_size(expr->base.type);
3080 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
3082 set_value_for_expression_addr(ap_expr, add, ap_addr);
3087 static ir_node *dereference_addr(const unary_expression_t *const expression)
3089 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3090 return expression_to_firm(expression->value);
3094 * Returns a IR-node representing an lvalue of the given expression.
3096 static ir_node *expression_to_addr(const expression_t *expression)
3098 switch(expression->kind) {
3099 case EXPR_ARRAY_ACCESS:
3100 return array_access_addr(&expression->array_access);
3102 return call_expression_to_firm(&expression->call);
3103 case EXPR_COMPOUND_LITERAL:
3104 return compound_literal_to_firm(&expression->compound_literal);
3105 case EXPR_REFERENCE:
3106 return reference_addr(&expression->reference);
3108 return select_addr(&expression->select);
3109 case EXPR_UNARY_DEREFERENCE:
3110 return dereference_addr(&expression->unary);
3114 panic("trying to get address of non-lvalue");
3117 static ir_node *builtin_constant_to_firm(
3118 const builtin_constant_expression_t *expression)
3120 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3123 if (is_constant_expression(expression->value)) {
3128 return new_Const_long(mode, v);
3131 static ir_node *builtin_prefetch_to_firm(
3132 const builtin_prefetch_expression_t *expression)
3134 ir_node *adr = expression_to_firm(expression->adr);
3135 /* no Firm support for prefetch yet */
3140 static ir_node *get_label_block(label_t *label)
3142 if (label->block != NULL)
3143 return label->block;
3145 /* beware: might be called from create initializer with current_ir_graph
3146 * set to const_code_irg. */
3147 ir_graph *rem = current_ir_graph;
3148 current_ir_graph = current_function;
3150 ir_node *block = new_immBlock();
3152 label->block = block;
3154 ARR_APP1(label_t *, all_labels, label);
3156 current_ir_graph = rem;
3161 * Pointer to a label. This is used for the
3162 * GNU address-of-label extension.
3164 static ir_node *label_address_to_firm(
3165 const label_address_expression_t *label)
3167 ir_node *block = get_label_block(label->label);
3168 ir_label_t nr = get_Block_label(block);
3171 nr = get_irp_next_label_nr();
3172 set_Block_label(block, nr);
3174 symconst_symbol value;
3176 return new_SymConst(mode_P_code, value, symconst_label);
3179 static ir_node *builtin_symbol_to_firm(
3180 const builtin_symbol_expression_t *expression)
3182 /* for gcc compatibility we have to produce (dummy) addresses for some
3184 if (warning.other) {
3185 warningf(&expression->base.source_position,
3186 "taking address of builtin '%Y'", expression->symbol);
3189 /* simply create a NULL pointer */
3190 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
3191 ir_node *res = new_Const_long(mode, 0);
3197 * creates firm nodes for an expression. The difference between this function
3198 * and expression_to_firm is, that this version might produce mode_b nodes
3199 * instead of mode_Is.
3201 static ir_node *_expression_to_firm(const expression_t *expression)
3204 if (!constant_folding) {
3205 assert(!expression->base.transformed);
3206 ((expression_t*) expression)->base.transformed = true;
3210 switch (expression->kind) {
3211 case EXPR_CHARACTER_CONSTANT:
3212 return character_constant_to_firm(&expression->conste);
3213 case EXPR_WIDE_CHARACTER_CONSTANT:
3214 return wide_character_constant_to_firm(&expression->conste);
3216 return const_to_firm(&expression->conste);
3217 case EXPR_STRING_LITERAL:
3218 return string_literal_to_firm(&expression->string);
3219 case EXPR_WIDE_STRING_LITERAL:
3220 return wide_string_literal_to_firm(&expression->wide_string);
3221 case EXPR_REFERENCE:
3222 return reference_expression_to_firm(&expression->reference);
3223 case EXPR_REFERENCE_ENUM_VALUE:
3224 return reference_expression_enum_value_to_firm(&expression->reference);
3226 return call_expression_to_firm(&expression->call);
3228 return unary_expression_to_firm(&expression->unary);
3230 return binary_expression_to_firm(&expression->binary);
3231 case EXPR_ARRAY_ACCESS:
3232 return array_access_to_firm(&expression->array_access);
3234 return sizeof_to_firm(&expression->typeprop);
3236 return alignof_to_firm(&expression->typeprop);
3237 case EXPR_CONDITIONAL:
3238 return conditional_to_firm(&expression->conditional);
3240 return select_to_firm(&expression->select);
3241 case EXPR_CLASSIFY_TYPE:
3242 return classify_type_to_firm(&expression->classify_type);
3244 return function_name_to_firm(&expression->funcname);
3245 case EXPR_STATEMENT:
3246 return statement_expression_to_firm(&expression->statement);
3248 return va_start_expression_to_firm(&expression->va_starte);
3250 return va_arg_expression_to_firm(&expression->va_arge);
3251 case EXPR_BUILTIN_SYMBOL:
3252 return builtin_symbol_to_firm(&expression->builtin_symbol);
3253 case EXPR_BUILTIN_CONSTANT_P:
3254 return builtin_constant_to_firm(&expression->builtin_constant);
3255 case EXPR_BUILTIN_PREFETCH:
3256 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3258 return offsetof_to_firm(&expression->offsetofe);
3259 case EXPR_COMPOUND_LITERAL:
3260 return compound_literal_to_firm(&expression->compound_literal);
3261 case EXPR_LABEL_ADDRESS:
3262 return label_address_to_firm(&expression->label_address);
3268 panic("invalid expression found");
3271 static bool is_builtin_expect(const expression_t *expression)
3273 if (expression->kind != EXPR_CALL)
3276 expression_t *function = expression->call.function;
3277 if (function->kind != EXPR_BUILTIN_SYMBOL)
3279 if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3285 static bool produces_mode_b(const expression_t *expression)
3287 switch (expression->kind) {
3288 case EXPR_BINARY_EQUAL:
3289 case EXPR_BINARY_NOTEQUAL:
3290 case EXPR_BINARY_LESS:
3291 case EXPR_BINARY_LESSEQUAL:
3292 case EXPR_BINARY_GREATER:
3293 case EXPR_BINARY_GREATEREQUAL:
3294 case EXPR_BINARY_ISGREATER:
3295 case EXPR_BINARY_ISGREATEREQUAL:
3296 case EXPR_BINARY_ISLESS:
3297 case EXPR_BINARY_ISLESSEQUAL:
3298 case EXPR_BINARY_ISLESSGREATER:
3299 case EXPR_BINARY_ISUNORDERED:
3300 case EXPR_UNARY_NOT:
3304 if (is_builtin_expect(expression)) {
3305 expression_t *argument = expression->call.arguments->expression;
3306 return produces_mode_b(argument);
3309 case EXPR_BINARY_COMMA:
3310 return produces_mode_b(expression->binary.right);
3317 static ir_node *expression_to_firm(const expression_t *expression)
3319 if (!produces_mode_b(expression)) {
3320 ir_node *res = _expression_to_firm(expression);
3321 assert(res == NULL || get_irn_mode(res) != mode_b);
3325 if (is_constant_expression(expression)) {
3326 ir_node *res = _expression_to_firm(expression);
3327 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3328 assert(is_Const(res));
3329 if (is_Const_null(res)) {
3330 return new_Const_long(mode, 0);
3332 return new_Const_long(mode, 1);
3336 /* we have to produce a 0/1 from the mode_b expression */
3337 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3338 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3339 return produce_condition_result(expression, mode, dbgi);
3343 * create a short-circuit expression evaluation that tries to construct
3344 * efficient control flow structures for &&, || and ! expressions
3346 static ir_node *create_condition_evaluation(const expression_t *expression,
3347 ir_node *true_block,
3348 ir_node *false_block)
3350 switch(expression->kind) {
3351 case EXPR_UNARY_NOT: {
3352 const unary_expression_t *unary_expression = &expression->unary;
3353 create_condition_evaluation(unary_expression->value, false_block,
3357 case EXPR_BINARY_LOGICAL_AND: {
3358 const binary_expression_t *binary_expression = &expression->binary;
3360 ir_node *extra_block = new_immBlock();
3361 create_condition_evaluation(binary_expression->left, extra_block,
3363 mature_immBlock(extra_block);
3364 set_cur_block(extra_block);
3365 create_condition_evaluation(binary_expression->right, true_block,
3369 case EXPR_BINARY_LOGICAL_OR: {
3370 const binary_expression_t *binary_expression = &expression->binary;
3372 ir_node *extra_block = new_immBlock();
3373 create_condition_evaluation(binary_expression->left, true_block,
3375 mature_immBlock(extra_block);
3376 set_cur_block(extra_block);
3377 create_condition_evaluation(binary_expression->right, true_block,
3385 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3386 ir_node *cond_expr = _expression_to_firm(expression);
3387 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3388 ir_node *cond = new_d_Cond(dbgi, condition);
3389 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3390 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3392 /* set branch prediction info based on __builtin_expect */
3393 if (is_builtin_expect(expression)) {
3394 call_argument_t *argument = expression->call.arguments->next;
3395 if (is_constant_expression(argument->expression)) {
3396 long cnst = fold_constant(argument->expression);
3397 cond_jmp_predicate pred;
3400 pred = COND_JMP_PRED_FALSE;
3402 pred = COND_JMP_PRED_TRUE;
3404 set_Cond_jmp_pred(cond, pred);
3408 add_immBlock_pred(true_block, true_proj);
3409 add_immBlock_pred(false_block, false_proj);
3411 set_cur_block(NULL);
3416 static void create_variable_entity(entity_t *variable,
3417 declaration_kind_t declaration_kind,
3418 ir_type *parent_type)
3420 assert(variable->kind == ENTITY_VARIABLE);
3421 type_t *type = skip_typeref(variable->declaration.type);
3422 type = get_aligned_type(type, variable->variable.alignment);
3424 ident *const id = new_id_from_str(variable->base.symbol->string);
3425 ir_type *const irtype = get_ir_type(type);
3426 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3428 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3430 handle_gnu_attributes_ent(irentity, variable);
3432 variable->declaration.kind = (unsigned char) declaration_kind;
3433 variable->variable.v.entity = irentity;
3434 set_entity_variability(irentity, variability_uninitialized);
3435 set_entity_ld_ident(irentity, create_ld_ident(variable));
3437 if (parent_type == get_tls_type())
3438 set_entity_allocation(irentity, allocation_automatic);
3439 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3440 set_entity_allocation(irentity, allocation_static);
3442 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3443 set_entity_volatility(irentity, volatility_is_volatile);
3448 typedef struct type_path_entry_t type_path_entry_t;
3449 struct type_path_entry_t {
3451 ir_initializer_t *initializer;
3453 entity_t *compound_entry;
3456 typedef struct type_path_t type_path_t;
3457 struct type_path_t {
3458 type_path_entry_t *path;
3463 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3465 size_t len = ARR_LEN(path->path);
3467 for (size_t i = 0; i < len; ++i) {
3468 const type_path_entry_t *entry = & path->path[i];
3470 type_t *type = skip_typeref(entry->type);
3471 if (is_type_compound(type)) {
3472 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3473 } else if (is_type_array(type)) {
3474 fprintf(stderr, "[%u]", (unsigned) entry->index);
3476 fprintf(stderr, "-INVALID-");
3479 fprintf(stderr, " (");
3480 print_type(path->top_type);
3481 fprintf(stderr, ")");
3484 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3486 size_t len = ARR_LEN(path->path);
3488 return & path->path[len-1];
3491 static type_path_entry_t *append_to_type_path(type_path_t *path)
3493 size_t len = ARR_LEN(path->path);
3494 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3496 type_path_entry_t *result = & path->path[len];
3497 memset(result, 0, sizeof(result[0]));
3501 static size_t get_compound_member_count(const compound_type_t *type)
3503 compound_t *compound = type->compound;
3504 size_t n_members = 0;
3505 entity_t *member = compound->members.entities;
3506 for ( ; member != NULL; member = member->base.next) {
3513 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3515 type_t *orig_top_type = path->top_type;
3516 type_t *top_type = skip_typeref(orig_top_type);
3518 assert(is_type_compound(top_type) || is_type_array(top_type));
3520 if (ARR_LEN(path->path) == 0) {
3523 type_path_entry_t *top = get_type_path_top(path);
3524 ir_initializer_t *initializer = top->initializer;
3525 return get_initializer_compound_value(initializer, top->index);
3529 static void descend_into_subtype(type_path_t *path)
3531 type_t *orig_top_type = path->top_type;
3532 type_t *top_type = skip_typeref(orig_top_type);
3534 assert(is_type_compound(top_type) || is_type_array(top_type));
3536 ir_initializer_t *initializer = get_initializer_entry(path);
3538 type_path_entry_t *top = append_to_type_path(path);
3539 top->type = top_type;
3543 if (is_type_compound(top_type)) {
3544 compound_t *compound = top_type->compound.compound;
3545 entity_t *entry = compound->members.entities;
3547 top->compound_entry = entry;
3549 len = get_compound_member_count(&top_type->compound);
3550 if (entry != NULL) {
3551 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3552 path->top_type = entry->declaration.type;
3555 assert(is_type_array(top_type));
3556 assert(top_type->array.size > 0);
3559 path->top_type = top_type->array.element_type;
3560 len = top_type->array.size;
3562 if (initializer == NULL
3563 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3564 initializer = create_initializer_compound(len);
3565 /* we have to set the entry at the 2nd latest path entry... */
3566 size_t path_len = ARR_LEN(path->path);
3567 assert(path_len >= 1);
3569 type_path_entry_t *entry = & path->path[path_len-2];
3570 ir_initializer_t *tinitializer = entry->initializer;
3571 set_initializer_compound_value(tinitializer, entry->index,
3575 top->initializer = initializer;
3578 static void ascend_from_subtype(type_path_t *path)
3580 type_path_entry_t *top = get_type_path_top(path);
3582 path->top_type = top->type;
3584 size_t len = ARR_LEN(path->path);
3585 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3588 static void walk_designator(type_path_t *path, const designator_t *designator)
3590 /* designators start at current object type */
3591 ARR_RESIZE(type_path_entry_t, path->path, 1);
3593 for ( ; designator != NULL; designator = designator->next) {
3594 type_path_entry_t *top = get_type_path_top(path);
3595 type_t *orig_type = top->type;
3596 type_t *type = skip_typeref(orig_type);
3598 if (designator->symbol != NULL) {
3599 assert(is_type_compound(type));
3601 symbol_t *symbol = designator->symbol;
3603 compound_t *compound = type->compound.compound;
3604 entity_t *iter = compound->members.entities;
3605 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3606 if (iter->base.symbol == symbol) {
3607 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3611 assert(iter != NULL);
3613 top->type = orig_type;
3614 top->compound_entry = iter;
3616 orig_type = iter->declaration.type;
3618 expression_t *array_index = designator->array_index;
3619 assert(designator->array_index != NULL);
3620 assert(is_type_array(type));
3622 long index = fold_constant(array_index);
3625 if (type->array.size_constant) {
3626 long array_size = type->array.size;
3627 assert(index < array_size);
3631 top->type = orig_type;
3632 top->index = (size_t) index;
3633 orig_type = type->array.element_type;
3635 path->top_type = orig_type;
3637 if (designator->next != NULL) {
3638 descend_into_subtype(path);
3642 path->invalid = false;
3645 static void advance_current_object(type_path_t *path)
3647 if (path->invalid) {
3648 /* TODO: handle this... */
3649 panic("invalid initializer in ast2firm (excessive elements)");
3652 type_path_entry_t *top = get_type_path_top(path);
3654 type_t *type = skip_typeref(top->type);
3655 if (is_type_union(type)) {
3656 top->compound_entry = NULL;
3657 } else if (is_type_struct(type)) {
3658 entity_t *entry = top->compound_entry;
3661 entry = entry->base.next;
3662 top->compound_entry = entry;
3663 if (entry != NULL) {
3664 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3665 path->top_type = entry->declaration.type;
3669 assert(is_type_array(type));
3672 if (!type->array.size_constant || top->index < type->array.size) {
3677 /* we're past the last member of the current sub-aggregate, try if we
3678 * can ascend in the type hierarchy and continue with another subobject */
3679 size_t len = ARR_LEN(path->path);
3682 ascend_from_subtype(path);
3683 advance_current_object(path);
3685 path->invalid = true;
3690 static ir_initializer_t *create_ir_initializer(
3691 const initializer_t *initializer, type_t *type);
3693 static ir_initializer_t *create_ir_initializer_value(
3694 const initializer_value_t *initializer)
3696 if (is_type_compound(initializer->value->base.type)) {
3697 panic("initializer creation for compounds not implemented yet");
3699 ir_node *value = expression_to_firm(initializer->value);
3700 type_t *type = initializer->value->base.type;
3701 ir_mode *mode = get_ir_mode_storage(type);
3702 value = create_conv(NULL, value, mode);
3703 return create_initializer_const(value);
3706 /** test wether type can be initialized by a string constant */
3707 static bool is_string_type(type_t *type)
3710 if (is_type_pointer(type)) {
3711 inner = skip_typeref(type->pointer.points_to);
3712 } else if(is_type_array(type)) {
3713 inner = skip_typeref(type->array.element_type);
3718 return is_type_integer(inner);
3721 static ir_initializer_t *create_ir_initializer_list(
3722 const initializer_list_t *initializer, type_t *type)
3725 memset(&path, 0, sizeof(path));
3726 path.top_type = type;
3727 path.path = NEW_ARR_F(type_path_entry_t, 0);
3729 descend_into_subtype(&path);
3731 for (size_t i = 0; i < initializer->len; ++i) {
3732 const initializer_t *sub_initializer = initializer->initializers[i];
3734 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3735 walk_designator(&path, sub_initializer->designator.designator);
3739 if (sub_initializer->kind == INITIALIZER_VALUE) {
3740 /* we might have to descend into types until we're at a scalar
3743 type_t *orig_top_type = path.top_type;
3744 type_t *top_type = skip_typeref(orig_top_type);
3746 if (is_type_scalar(top_type))
3748 descend_into_subtype(&path);
3750 } else if (sub_initializer->kind == INITIALIZER_STRING
3751 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3752 /* we might have to descend into types until we're at a scalar
3755 type_t *orig_top_type = path.top_type;
3756 type_t *top_type = skip_typeref(orig_top_type);
3758 if (is_string_type(top_type))
3760 descend_into_subtype(&path);
3764 ir_initializer_t *sub_irinitializer
3765 = create_ir_initializer(sub_initializer, path.top_type);
3767 size_t path_len = ARR_LEN(path.path);
3768 assert(path_len >= 1);
3769 type_path_entry_t *entry = & path.path[path_len-1];
3770 ir_initializer_t *tinitializer = entry->initializer;
3771 set_initializer_compound_value(tinitializer, entry->index,
3774 advance_current_object(&path);
3777 assert(ARR_LEN(path.path) >= 1);
3778 ir_initializer_t *result = path.path[0].initializer;
3779 DEL_ARR_F(path.path);
3784 static ir_initializer_t *create_ir_initializer_string(
3785 const initializer_string_t *initializer, type_t *type)
3787 type = skip_typeref(type);
3789 size_t string_len = initializer->string.size;
3790 assert(type->kind == TYPE_ARRAY);
3791 assert(type->array.size_constant);
3792 size_t len = type->array.size;
3793 ir_initializer_t *irinitializer = create_initializer_compound(len);
3795 const char *string = initializer->string.begin;
3796 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3798 for (size_t i = 0; i < len; ++i) {
3803 tarval *tv = new_tarval_from_long(c, mode);
3804 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3806 set_initializer_compound_value(irinitializer, i, char_initializer);
3809 return irinitializer;
3812 static ir_initializer_t *create_ir_initializer_wide_string(
3813 const initializer_wide_string_t *initializer, type_t *type)
3815 size_t string_len = initializer->string.size;
3816 assert(type->kind == TYPE_ARRAY);
3817 assert(type->array.size_constant);
3818 size_t len = type->array.size;
3819 ir_initializer_t *irinitializer = create_initializer_compound(len);
3821 const wchar_rep_t *string = initializer->string.begin;
3822 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3824 for (size_t i = 0; i < len; ++i) {
3826 if (i < string_len) {
3829 tarval *tv = new_tarval_from_long(c, mode);
3830 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3832 set_initializer_compound_value(irinitializer, i, char_initializer);
3835 return irinitializer;
3838 static ir_initializer_t *create_ir_initializer(
3839 const initializer_t *initializer, type_t *type)
3841 switch(initializer->kind) {
3842 case INITIALIZER_STRING:
3843 return create_ir_initializer_string(&initializer->string, type);
3845 case INITIALIZER_WIDE_STRING:
3846 return create_ir_initializer_wide_string(&initializer->wide_string,
3849 case INITIALIZER_LIST:
3850 return create_ir_initializer_list(&initializer->list, type);
3852 case INITIALIZER_VALUE:
3853 return create_ir_initializer_value(&initializer->value);
3855 case INITIALIZER_DESIGNATOR:
3856 panic("unexpected designator initializer found");
3858 panic("unknown initializer");
3861 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3864 if (is_atomic_type(type)) {
3865 ir_mode *mode = get_type_mode(type);
3866 tarval *zero = get_mode_null(mode);
3867 ir_node *cnst = new_d_Const(dbgi, zero);
3869 /* TODO: bitfields */
3870 ir_node *mem = get_store();
3871 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, 0);
3872 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3875 assert(is_compound_type(type));
3878 if (is_Array_type(type)) {
3879 assert(has_array_upper_bound(type, 0));
3880 n_members = get_array_upper_bound_int(type, 0);
3882 n_members = get_compound_n_members(type);
3885 for (int i = 0; i < n_members; ++i) {
3888 if (is_Array_type(type)) {
3889 ir_entity *entity = get_array_element_entity(type);
3890 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3891 ir_node *cnst = new_d_Const(dbgi, index_tv);
3892 ir_node *in[1] = { cnst };
3893 irtype = get_array_element_type(type);
3894 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3896 ir_entity *member = get_compound_member(type, i);
3898 irtype = get_entity_type(member);
3899 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3902 create_dynamic_null_initializer(irtype, dbgi, addr);
3907 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3908 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3910 switch(get_initializer_kind(initializer)) {
3911 case IR_INITIALIZER_NULL: {
3912 create_dynamic_null_initializer(type, dbgi, base_addr);
3915 case IR_INITIALIZER_CONST: {
3916 ir_node *node = get_initializer_const_value(initializer);
3917 ir_mode *mode = get_irn_mode(node);
3918 ir_type *ent_type = get_entity_type(entity);
3920 /* is it a bitfield type? */
3921 if (is_Primitive_type(ent_type) &&
3922 get_primitive_base_type(ent_type) != NULL) {
3923 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3927 assert(get_type_mode(type) == mode);
3928 ir_node *mem = get_store();
3929 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, 0);
3930 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3934 case IR_INITIALIZER_TARVAL: {
3935 tarval *tv = get_initializer_tarval_value(initializer);
3936 ir_mode *mode = get_tarval_mode(tv);
3937 ir_node *cnst = new_d_Const(dbgi, tv);
3938 ir_type *ent_type = get_entity_type(entity);
3940 /* is it a bitfield type? */
3941 if (is_Primitive_type(ent_type) &&
3942 get_primitive_base_type(ent_type) != NULL) {
3943 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3947 assert(get_type_mode(type) == mode);
3948 ir_node *mem = get_store();
3949 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, 0);
3950 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3954 case IR_INITIALIZER_COMPOUND: {
3955 assert(is_compound_type(type));
3957 if (is_Array_type(type)) {
3958 assert(has_array_upper_bound(type, 0));
3959 n_members = get_array_upper_bound_int(type, 0);
3961 n_members = get_compound_n_members(type);
3964 if (get_initializer_compound_n_entries(initializer)
3965 != (unsigned) n_members)
3966 panic("initializer doesn't match compound type");
3968 for (int i = 0; i < n_members; ++i) {
3971 ir_entity *sub_entity;
3972 if (is_Array_type(type)) {
3973 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3974 ir_node *cnst = new_d_Const(dbgi, index_tv);
3975 ir_node *in[1] = { cnst };
3976 irtype = get_array_element_type(type);
3977 sub_entity = get_array_element_entity(type);
3978 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3981 sub_entity = get_compound_member(type, i);
3982 irtype = get_entity_type(sub_entity);
3983 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3987 ir_initializer_t *sub_init
3988 = get_initializer_compound_value(initializer, i);
3990 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3997 panic("invalid IR_INITIALIZER found");
4000 static void create_dynamic_initializer(ir_initializer_t *initializer,
4001 dbg_info *dbgi, ir_entity *entity)
4003 ir_node *frame = get_local_frame(entity);
4004 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4005 ir_type *type = get_entity_type(entity);
4007 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4010 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4011 ir_entity *entity, type_t *type)
4013 ir_node *memory = get_store();
4014 ir_node *nomem = new_NoMem();
4015 ir_node *frame = get_irg_frame(current_ir_graph);
4016 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4018 if (initializer->kind == INITIALIZER_VALUE) {
4019 initializer_value_t *initializer_value = &initializer->value;
4021 ir_node *value = expression_to_firm(initializer_value->value);
4022 type = skip_typeref(type);
4023 assign_value(dbgi, addr, type, value);
4027 if (!is_constant_initializer(initializer)) {
4028 ir_initializer_t *irinitializer
4029 = create_ir_initializer(initializer, type);
4031 create_dynamic_initializer(irinitializer, dbgi, entity);
4035 /* create the ir_initializer */
4036 ir_graph *const old_current_ir_graph = current_ir_graph;
4037 current_ir_graph = get_const_code_irg();
4039 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4041 assert(current_ir_graph == get_const_code_irg());
4042 current_ir_graph = old_current_ir_graph;
4044 /* create a "template" entity which is copied to the entity on the stack */
4045 ident *const id = id_unique("initializer.%u");
4046 ir_type *const irtype = get_ir_type(type);
4047 ir_type *const global_type = get_glob_type();
4048 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4049 set_entity_ld_ident(init_entity, id);
4051 set_entity_variability(init_entity, variability_initialized);
4052 set_entity_visibility(init_entity, visibility_local);
4053 set_entity_allocation(init_entity, allocation_static);
4055 set_entity_initializer(init_entity, irinitializer);
4057 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4058 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4060 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4061 set_store(copyb_mem);
4064 static void create_initializer_local_variable_entity(entity_t *entity)
4066 assert(entity->kind == ENTITY_VARIABLE);
4067 initializer_t *initializer = entity->variable.initializer;
4068 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4069 ir_entity *irentity = entity->variable.v.entity;
4070 type_t *type = entity->declaration.type;
4072 type = get_aligned_type(type, entity->variable.alignment);
4073 create_local_initializer(initializer, dbgi, irentity, type);
4076 static void create_variable_initializer(entity_t *entity)
4078 assert(entity->kind == ENTITY_VARIABLE);
4079 initializer_t *initializer = entity->variable.initializer;
4080 if (initializer == NULL)
4083 declaration_kind_t declaration_kind
4084 = (declaration_kind_t) entity->declaration.kind;
4085 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4086 create_initializer_local_variable_entity(entity);
4090 type_t *type = entity->declaration.type;
4091 type_qualifiers_t tq = get_type_qualifier(type, true);
4093 if (initializer->kind == INITIALIZER_VALUE) {
4094 initializer_value_t *initializer_value = &initializer->value;
4095 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4097 ir_node *value = expression_to_firm(initializer_value->value);
4099 type_t *type = initializer_value->value->base.type;
4100 ir_mode *mode = get_ir_mode_storage(type);
4101 value = create_conv(dbgi, value, mode);
4102 value = do_strict_conv(dbgi, value);
4104 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4105 set_value(entity->variable.v.value_number, value);
4107 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4109 ir_entity *irentity = entity->variable.v.entity;
4111 if (tq & TYPE_QUALIFIER_CONST) {
4112 set_entity_variability(irentity, variability_constant);
4114 set_entity_variability(irentity, variability_initialized);
4116 set_atomic_ent_value(irentity, value);
4119 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4120 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4122 ir_entity *irentity = entity->variable.v.entity;
4123 ir_initializer_t *irinitializer
4124 = create_ir_initializer(initializer, type);
4126 if (tq & TYPE_QUALIFIER_CONST) {
4127 set_entity_variability(irentity, variability_constant);
4129 set_entity_variability(irentity, variability_initialized);
4131 set_entity_initializer(irentity, irinitializer);
4135 static void create_variable_length_array(entity_t *entity)
4137 assert(entity->kind == ENTITY_VARIABLE);
4138 assert(entity->variable.initializer == NULL);
4140 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4141 entity->variable.v.vla_base = NULL;
4143 /* TODO: record VLA somewhere so we create the free node when we leave
4147 static void allocate_variable_length_array(entity_t *entity)
4149 assert(entity->kind == ENTITY_VARIABLE);
4150 assert(entity->variable.initializer == NULL);
4151 assert(get_cur_block() != NULL);
4153 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4154 type_t *type = entity->declaration.type;
4155 ir_type *el_type = get_ir_type(type->array.element_type);
4157 /* make sure size_node is calculated */
4158 get_type_size(type);
4159 ir_node *elems = type->array.size_node;
4160 ir_node *mem = get_store();
4161 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4163 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4164 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4167 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4168 entity->variable.v.vla_base = addr;
4172 * Creates a Firm local variable from a declaration.
4174 static void create_local_variable(entity_t *entity)
4176 assert(entity->kind == ENTITY_VARIABLE);
4177 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4179 bool needs_entity = entity->variable.address_taken;
4180 type_t *type = skip_typeref(entity->declaration.type);
4182 /* is it a variable length array? */
4183 if (is_type_array(type) && !type->array.size_constant) {
4184 create_variable_length_array(entity);
4186 } else if (is_type_array(type) || is_type_compound(type)) {
4187 needs_entity = true;
4188 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4189 needs_entity = true;
4193 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4194 create_variable_entity(entity,
4195 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4198 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4199 entity->variable.v.value_number = next_value_number_function;
4200 set_irg_loc_description(current_ir_graph, next_value_number_function,
4202 ++next_value_number_function;
4206 static void create_local_static_variable(entity_t *entity)
4208 assert(entity->kind == ENTITY_VARIABLE);
4209 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4211 type_t *type = skip_typeref(entity->declaration.type);
4212 type = get_aligned_type(type, entity->variable.alignment);
4214 ir_type *const var_type = entity->variable.thread_local ?
4215 get_tls_type() : get_glob_type();
4216 ir_type *const irtype = get_ir_type(type);
4217 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4219 size_t l = strlen(entity->base.symbol->string);
4220 char buf[l + sizeof(".%u")];
4221 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4222 ident *const id = id_unique(buf);
4224 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4226 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4227 set_entity_volatility(irentity, volatility_is_volatile);
4230 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4231 entity->variable.v.entity = irentity;
4233 set_entity_ld_ident(irentity, id);
4234 set_entity_variability(irentity, variability_uninitialized);
4235 set_entity_visibility(irentity, visibility_local);
4236 set_entity_allocation(irentity, entity->variable.thread_local ?
4237 allocation_automatic : allocation_static);
4239 ir_graph *const old_current_ir_graph = current_ir_graph;
4240 current_ir_graph = get_const_code_irg();
4242 create_variable_initializer(entity);
4244 assert(current_ir_graph == get_const_code_irg());
4245 current_ir_graph = old_current_ir_graph;
4250 static void return_statement_to_firm(return_statement_t *statement)
4252 if (get_cur_block() == NULL)
4255 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4256 type_t *type = current_function_entity->declaration.type;
4257 ir_type *func_irtype = get_ir_type(type);
4262 if (get_method_n_ress(func_irtype) > 0) {
4263 ir_type *res_type = get_method_res_type(func_irtype, 0);
4265 if (statement->value != NULL) {
4266 ir_node *node = expression_to_firm(statement->value);
4267 if (!is_compound_type(res_type)) {
4268 type_t *type = statement->value->base.type;
4269 ir_mode *mode = get_ir_mode_storage(type);
4270 node = create_conv(dbgi, node, mode);
4271 node = do_strict_conv(dbgi, node);
4276 if (is_compound_type(res_type)) {
4279 mode = get_type_mode(res_type);
4281 in[0] = new_Unknown(mode);
4285 /* build return_value for its side effects */
4286 if (statement->value != NULL) {
4287 expression_to_firm(statement->value);
4292 ir_node *store = get_store();
4293 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4295 ir_node *end_block = get_irg_end_block(current_ir_graph);
4296 add_immBlock_pred(end_block, ret);
4298 set_cur_block(NULL);
4301 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4303 if (get_cur_block() == NULL)
4306 return expression_to_firm(statement->expression);
4309 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4311 entity_t *entity = compound->scope.entities;
4312 for ( ; entity != NULL; entity = entity->base.next) {
4313 if (!is_declaration(entity))
4316 create_local_declaration(entity);
4319 ir_node *result = NULL;
4320 statement_t *statement = compound->statements;
4321 for ( ; statement != NULL; statement = statement->base.next) {
4322 if (statement->base.next == NULL
4323 && statement->kind == STATEMENT_EXPRESSION) {
4324 result = expression_statement_to_firm(
4325 &statement->expression);
4328 statement_to_firm(statement);
4334 static void create_global_variable(entity_t *entity)
4336 assert(entity->kind == ENTITY_VARIABLE);
4339 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4340 case STORAGE_CLASS_STATIC: vis = visibility_local; break;
4341 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4342 case STORAGE_CLASS_NONE: vis = visibility_external_visible; break;
4344 default: panic("Invalid storage class for global variable");
4347 ir_type *var_type = entity->variable.thread_local ?
4348 get_tls_type() : get_glob_type();
4349 create_variable_entity(entity,
4350 DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4351 set_entity_visibility(entity->variable.v.entity, vis);
4354 static void create_local_declaration(entity_t *entity)
4356 assert(is_declaration(entity));
4358 /* construct type */
4359 (void) get_ir_type(entity->declaration.type);
4360 if (entity->base.symbol == NULL) {
4364 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4365 case STORAGE_CLASS_STATIC:
4366 create_local_static_variable(entity);
4368 case STORAGE_CLASS_EXTERN:
4369 if (entity->kind == ENTITY_FUNCTION) {
4370 assert(entity->function.statement == NULL);
4371 get_function_entity(entity);
4373 create_global_variable(entity);
4374 create_variable_initializer(entity);
4377 case STORAGE_CLASS_NONE:
4378 case STORAGE_CLASS_AUTO:
4379 case STORAGE_CLASS_REGISTER:
4380 if (entity->kind == ENTITY_FUNCTION) {
4381 if (entity->function.statement != NULL) {
4382 get_function_entity(entity);
4383 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4384 enqueue_inner_function(entity);
4386 get_function_entity(entity);
4389 create_local_variable(entity);
4392 case STORAGE_CLASS_TYPEDEF:
4395 panic("invalid storage class found");
4398 static void initialize_local_declaration(entity_t *entity)
4400 if (entity->base.symbol == NULL)
4403 switch ((declaration_kind_t) entity->declaration.kind) {
4404 case DECLARATION_KIND_LOCAL_VARIABLE:
4405 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4406 create_variable_initializer(entity);
4409 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4410 allocate_variable_length_array(entity);
4413 case DECLARATION_KIND_COMPOUND_MEMBER:
4414 case DECLARATION_KIND_GLOBAL_VARIABLE:
4415 case DECLARATION_KIND_FUNCTION:
4416 case DECLARATION_KIND_INNER_FUNCTION:
4419 case DECLARATION_KIND_PARAMETER:
4420 case DECLARATION_KIND_PARAMETER_ENTITY:
4421 panic("can't initialize parameters");
4423 case DECLARATION_KIND_UNKNOWN:
4424 panic("can't initialize unknown declaration");
4426 panic("invalid declaration kind");
4429 static void declaration_statement_to_firm(declaration_statement_t *statement)
4431 entity_t * entity = statement->declarations_begin;
4432 entity_t *const last = statement->declarations_end;
4433 if (entity != NULL) {
4434 for ( ;; entity = entity->base.next) {
4435 if (is_declaration(entity)) {
4436 initialize_local_declaration(entity);
4437 } else if (entity->kind == ENTITY_TYPEDEF) {
4438 type_t *const type = skip_typeref(entity->typedefe.type);
4439 if (is_type_array(type) && type->array.is_vla)
4440 get_vla_size(&type->array);
4448 static void if_statement_to_firm(if_statement_t *statement)
4450 ir_node *cur_block = get_cur_block();
4452 ir_node *fallthrough_block = NULL;
4454 /* the true (blocks) */
4455 ir_node *true_block = NULL;
4456 if (statement->true_statement != NULL) {
4457 true_block = new_immBlock();
4458 set_cur_block(true_block);
4459 statement_to_firm(statement->true_statement);
4460 if (get_cur_block() != NULL) {
4461 ir_node *jmp = new_Jmp();
4462 if (fallthrough_block == NULL)
4463 fallthrough_block = new_immBlock();
4464 add_immBlock_pred(fallthrough_block, jmp);
4468 /* the false (blocks) */
4469 ir_node *false_block = NULL;
4470 if (statement->false_statement != NULL) {
4471 false_block = new_immBlock();
4472 set_cur_block(false_block);
4474 statement_to_firm(statement->false_statement);
4475 if (get_cur_block() != NULL) {
4476 ir_node *jmp = new_Jmp();
4477 if (fallthrough_block == NULL)
4478 fallthrough_block = new_immBlock();
4479 add_immBlock_pred(fallthrough_block, jmp);
4483 /* create the condition */
4484 if (cur_block != NULL) {
4485 if (true_block == NULL || false_block == NULL) {
4486 if (fallthrough_block == NULL)
4487 fallthrough_block = new_immBlock();
4488 if (true_block == NULL)
4489 true_block = fallthrough_block;
4490 if (false_block == NULL)
4491 false_block = fallthrough_block;
4494 set_cur_block(cur_block);
4495 create_condition_evaluation(statement->condition, true_block,
4499 mature_immBlock(true_block);
4500 if (false_block != fallthrough_block && false_block != NULL) {
4501 mature_immBlock(false_block);
4503 if (fallthrough_block != NULL) {
4504 mature_immBlock(fallthrough_block);
4507 set_cur_block(fallthrough_block);
4510 static void while_statement_to_firm(while_statement_t *statement)
4512 ir_node *jmp = NULL;
4513 if (get_cur_block() != NULL) {
4517 /* create the header block */
4518 ir_node *header_block = new_immBlock();
4520 add_immBlock_pred(header_block, jmp);
4524 ir_node *old_continue_label = continue_label;
4525 ir_node *old_break_label = break_label;
4526 continue_label = header_block;
4529 ir_node *body_block = new_immBlock();
4530 set_cur_block(body_block);
4531 statement_to_firm(statement->body);
4532 ir_node *false_block = break_label;
4534 assert(continue_label == header_block);
4535 continue_label = old_continue_label;
4536 break_label = old_break_label;
4538 if (get_cur_block() != NULL) {
4540 add_immBlock_pred(header_block, jmp);
4543 /* shortcut for while(true) */
4544 if (is_constant_expression(statement->condition)
4545 && fold_constant(statement->condition) != 0) {
4546 set_cur_block(header_block);
4547 ir_node *header_jmp = new_Jmp();
4548 add_immBlock_pred(body_block, header_jmp);
4550 keep_alive(body_block);
4551 keep_all_memory(body_block);
4552 set_cur_block(body_block);
4554 if (false_block == NULL) {
4555 false_block = new_immBlock();
4558 /* create the condition */
4559 set_cur_block(header_block);
4561 create_condition_evaluation(statement->condition, body_block,
4565 mature_immBlock(body_block);
4566 mature_immBlock(header_block);
4567 if (false_block != NULL) {
4568 mature_immBlock(false_block);
4571 set_cur_block(false_block);
4574 static void do_while_statement_to_firm(do_while_statement_t *statement)
4576 ir_node *jmp = NULL;
4577 if (get_cur_block() != NULL) {
4581 /* create the header block */
4582 ir_node *header_block = new_immBlock();
4585 ir_node *body_block = new_immBlock();
4587 add_immBlock_pred(body_block, jmp);
4590 ir_node *old_continue_label = continue_label;
4591 ir_node *old_break_label = break_label;
4592 continue_label = header_block;
4595 set_cur_block(body_block);
4596 statement_to_firm(statement->body);
4597 ir_node *false_block = break_label;
4599 assert(continue_label == header_block);
4600 continue_label = old_continue_label;
4601 break_label = old_break_label;
4603 if (get_cur_block() != NULL) {
4604 ir_node *body_jmp = new_Jmp();
4605 add_immBlock_pred(header_block, body_jmp);
4606 mature_immBlock(header_block);
4609 if (false_block == NULL) {
4610 false_block = new_immBlock();
4613 /* create the condition */
4614 set_cur_block(header_block);
4616 create_condition_evaluation(statement->condition, body_block, false_block);
4617 mature_immBlock(body_block);
4618 mature_immBlock(header_block);
4619 mature_immBlock(false_block);
4621 set_cur_block(false_block);
4624 static void for_statement_to_firm(for_statement_t *statement)
4626 ir_node *jmp = NULL;
4628 /* create declarations */
4629 entity_t *entity = statement->scope.entities;
4630 for ( ; entity != NULL; entity = entity->base.next) {
4631 if (!is_declaration(entity))
4634 create_local_declaration(entity);
4637 if (get_cur_block() != NULL) {
4638 entity = statement->scope.entities;
4639 for ( ; entity != NULL; entity = entity->base.next) {
4640 if (!is_declaration(entity))
4643 initialize_local_declaration(entity);
4646 if (statement->initialisation != NULL) {
4647 expression_to_firm(statement->initialisation);
4654 /* create the step block */
4655 ir_node *const step_block = new_immBlock();
4656 set_cur_block(step_block);
4657 if (statement->step != NULL) {
4658 expression_to_firm(statement->step);
4660 ir_node *const step_jmp = new_Jmp();
4662 /* create the header block */
4663 ir_node *const header_block = new_immBlock();
4664 set_cur_block(header_block);
4666 add_immBlock_pred(header_block, jmp);
4668 add_immBlock_pred(header_block, step_jmp);
4670 /* the false block */
4671 ir_node *const false_block = new_immBlock();
4674 ir_node *body_block;
4675 if (statement->body != NULL) {
4676 ir_node *const old_continue_label = continue_label;
4677 ir_node *const old_break_label = break_label;
4678 continue_label = step_block;
4679 break_label = false_block;
4681 body_block = new_immBlock();
4682 set_cur_block(body_block);
4683 statement_to_firm(statement->body);
4685 assert(continue_label == step_block);
4686 assert(break_label == false_block);
4687 continue_label = old_continue_label;
4688 break_label = old_break_label;
4690 if (get_cur_block() != NULL) {
4692 add_immBlock_pred(step_block, jmp);
4695 body_block = step_block;
4698 /* create the condition */
4699 set_cur_block(header_block);
4700 if (statement->condition != NULL) {
4701 create_condition_evaluation(statement->condition, body_block,
4704 keep_alive(header_block);
4705 keep_all_memory(header_block);
4707 add_immBlock_pred(body_block, jmp);
4710 mature_immBlock(body_block);
4711 mature_immBlock(false_block);
4712 mature_immBlock(step_block);
4713 mature_immBlock(header_block);
4714 mature_immBlock(false_block);
4716 set_cur_block(false_block);
4719 static void create_jump_statement(const statement_t *statement,
4720 ir_node *target_block)
4722 if (get_cur_block() == NULL)
4725 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4726 ir_node *jump = new_d_Jmp(dbgi);
4727 add_immBlock_pred(target_block, jump);
4729 set_cur_block(NULL);
4732 static ir_node *get_break_label(void)
4734 if (break_label == NULL) {
4735 break_label = new_immBlock();
4740 static void switch_statement_to_firm(switch_statement_t *statement)
4742 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4744 ir_node *expression = expression_to_firm(statement->expression);
4745 ir_node *cond = new_d_Cond(dbgi, expression);
4747 set_cur_block(NULL);
4749 ir_node *const old_switch_cond = current_switch_cond;
4750 ir_node *const old_break_label = break_label;
4751 const bool old_saw_default_label = saw_default_label;
4752 saw_default_label = false;
4753 current_switch_cond = cond;
4755 switch_statement_t *const old_switch = current_switch;
4756 current_switch = statement;
4758 /* determine a free number for the default label */
4759 unsigned long num_cases = 0;
4761 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4762 if (l->expression == NULL) {
4766 if (l->last_case >= l->first_case)
4767 num_cases += l->last_case - l->first_case + 1;
4768 if (l->last_case > def_nr)
4769 def_nr = l->last_case;
4772 if (def_nr == INT_MAX) {
4773 /* Bad: an overflow will occurr, we cannot be sure that the
4774 * maximum + 1 is a free number. Scan the values a second
4775 * time to find a free number.
4777 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4779 memset(bits, 0, (num_cases + 7) >> 3);
4780 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4781 if (l->expression == NULL) {
4785 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4786 if (start < num_cases && l->last_case >= 0) {
4787 unsigned long end = (unsigned long)l->last_case < num_cases ?
4788 (unsigned long)l->last_case : num_cases - 1;
4789 for (unsigned long cns = start; cns <= end; ++cns) {
4790 bits[cns >> 3] |= (1 << (cns & 7));
4794 /* We look at the first num_cases constants:
4795 * Either they are densed, so we took the last (num_cases)
4796 * one, or they are non densed, so we will find one free
4800 for (i = 0; i < num_cases; ++i)
4801 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4809 statement->default_proj_nr = def_nr;
4811 if (statement->body != NULL) {
4812 statement_to_firm(statement->body);
4815 if (get_cur_block() != NULL) {
4816 ir_node *jmp = new_Jmp();
4817 add_immBlock_pred(get_break_label(), jmp);
4820 if (!saw_default_label) {
4821 set_cur_block(get_nodes_block(cond));
4822 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4823 statement->default_proj_nr);
4824 add_immBlock_pred(get_break_label(), proj);
4827 if (break_label != NULL) {
4828 mature_immBlock(break_label);
4830 set_cur_block(break_label);
4832 assert(current_switch_cond == cond);
4833 current_switch = old_switch;
4834 current_switch_cond = old_switch_cond;
4835 break_label = old_break_label;
4836 saw_default_label = old_saw_default_label;
4839 static void case_label_to_firm(const case_label_statement_t *statement)
4841 if (statement->is_empty_range)
4844 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4846 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4849 ir_node *block = new_immBlock();
4851 set_cur_block(get_nodes_block(current_switch_cond));
4852 if (statement->expression != NULL) {
4853 long pn = statement->first_case;
4854 long end_pn = statement->last_case;
4855 assert(pn <= end_pn);
4856 /* create jumps for all cases in the given range */
4858 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4859 add_immBlock_pred(block, proj);
4860 } while(pn++ < end_pn);
4862 saw_default_label = true;
4863 proj = new_d_defaultProj(dbgi, current_switch_cond,
4864 current_switch->default_proj_nr);
4866 add_immBlock_pred(block, proj);
4869 if (fallthrough != NULL) {
4870 add_immBlock_pred(block, fallthrough);
4872 mature_immBlock(block);
4873 set_cur_block(block);
4875 if (statement->statement != NULL) {
4876 statement_to_firm(statement->statement);
4880 static void label_to_firm(const label_statement_t *statement)
4882 ir_node *block = get_label_block(statement->label);
4884 if (get_cur_block() != NULL) {
4885 ir_node *jmp = new_Jmp();
4886 add_immBlock_pred(block, jmp);
4889 set_cur_block(block);
4891 keep_all_memory(block);
4893 if (statement->statement != NULL) {
4894 statement_to_firm(statement->statement);
4898 static void goto_to_firm(const goto_statement_t *statement)
4900 if (get_cur_block() == NULL)
4903 if (statement->expression) {
4904 ir_node *irn = expression_to_firm(statement->expression);
4905 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4906 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4908 set_irn_link(ijmp, ijmp_list);
4911 ir_node *block = get_label_block(statement->label);
4912 ir_node *jmp = new_Jmp();
4913 add_immBlock_pred(block, jmp);
4915 set_cur_block(NULL);
4918 static void asm_statement_to_firm(const asm_statement_t *statement)
4920 bool needs_memory = false;
4922 if (statement->is_volatile) {
4923 needs_memory = true;
4926 size_t n_clobbers = 0;
4927 asm_clobber_t *clobber = statement->clobbers;
4928 for ( ; clobber != NULL; clobber = clobber->next) {
4929 const char *clobber_str = clobber->clobber.begin;
4931 if (!be_is_valid_clobber(clobber_str)) {
4932 errorf(&statement->base.source_position,
4933 "invalid clobber '%s' specified", clobber->clobber);
4937 if (strcmp(clobber_str, "memory") == 0) {
4938 needs_memory = true;
4942 ident *id = new_id_from_str(clobber_str);
4943 obstack_ptr_grow(&asm_obst, id);
4946 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4947 ident **clobbers = NULL;
4948 if (n_clobbers > 0) {
4949 clobbers = obstack_finish(&asm_obst);
4952 size_t n_inputs = 0;
4953 asm_argument_t *argument = statement->inputs;
4954 for ( ; argument != NULL; argument = argument->next)
4956 size_t n_outputs = 0;
4957 argument = statement->outputs;
4958 for ( ; argument != NULL; argument = argument->next)
4961 unsigned next_pos = 0;
4963 ir_node *ins[n_inputs + n_outputs + 1];
4966 ir_asm_constraint tmp_in_constraints[n_outputs];
4968 const expression_t *out_exprs[n_outputs];
4969 ir_node *out_addrs[n_outputs];
4970 size_t out_size = 0;
4972 argument = statement->outputs;
4973 for ( ; argument != NULL; argument = argument->next) {
4974 const char *constraints = argument->constraints.begin;
4975 asm_constraint_flags_t asm_flags
4976 = be_parse_asm_constraints(constraints);
4978 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4979 warningf(&statement->base.source_position,
4980 "some constraints in '%s' are not supported", constraints);
4982 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4983 errorf(&statement->base.source_position,
4984 "some constraints in '%s' are invalid", constraints);
4987 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4988 errorf(&statement->base.source_position,
4989 "no write flag specified for output constraints '%s'",
4994 unsigned pos = next_pos++;
4995 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4996 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4997 expression_t *expr = argument->expression;
4998 ir_node *addr = expression_to_addr(expr);
4999 /* in+output, construct an artifical same_as constraint on the
5001 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5003 ir_node *value = get_value_from_lvalue(expr, addr);
5005 snprintf(buf, sizeof(buf), "%u", pos);
5007 ir_asm_constraint constraint;
5008 constraint.pos = pos;
5009 constraint.constraint = new_id_from_str(buf);
5010 constraint.mode = get_ir_mode_storage(expr->base.type);
5011 tmp_in_constraints[in_size] = constraint;
5012 ins[in_size] = value;
5017 out_exprs[out_size] = expr;
5018 out_addrs[out_size] = addr;
5020 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5021 /* pure memory ops need no input (but we have to make sure we
5022 * attach to the memory) */
5023 assert(! (asm_flags &
5024 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5025 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5026 needs_memory = true;
5028 /* we need to attach the address to the inputs */
5029 expression_t *expr = argument->expression;
5031 ir_asm_constraint constraint;
5032 constraint.pos = pos;
5033 constraint.constraint = new_id_from_str(constraints);
5034 constraint.mode = NULL;
5035 tmp_in_constraints[in_size] = constraint;
5037 ins[in_size] = expression_to_addr(expr);
5041 errorf(&statement->base.source_position,
5042 "only modifiers but no place set in constraints '%s'",
5047 ir_asm_constraint constraint;
5048 constraint.pos = pos;
5049 constraint.constraint = new_id_from_str(constraints);
5050 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5052 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5054 assert(obstack_object_size(&asm_obst)
5055 == out_size * sizeof(ir_asm_constraint));
5056 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5059 obstack_grow(&asm_obst, tmp_in_constraints,
5060 in_size * sizeof(tmp_in_constraints[0]));
5061 /* find and count input and output arguments */
5062 argument = statement->inputs;
5063 for ( ; argument != NULL; argument = argument->next) {
5064 const char *constraints = argument->constraints.begin;
5065 asm_constraint_flags_t asm_flags
5066 = be_parse_asm_constraints(constraints);
5068 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5069 errorf(&statement->base.source_position,
5070 "some constraints in '%s' are not supported", constraints);
5073 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5074 errorf(&statement->base.source_position,
5075 "some constraints in '%s' are invalid", constraints);
5078 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5079 errorf(&statement->base.source_position,
5080 "write flag specified for input constraints '%s'",
5086 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5087 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5088 /* we can treat this as "normal" input */
5089 input = expression_to_firm(argument->expression);
5090 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5091 /* pure memory ops need no input (but we have to make sure we
5092 * attach to the memory) */
5093 assert(! (asm_flags &
5094 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5095 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5096 needs_memory = true;
5097 input = expression_to_addr(argument->expression);
5099 errorf(&statement->base.source_position,
5100 "only modifiers but no place set in constraints '%s'",
5105 ir_asm_constraint constraint;
5106 constraint.pos = next_pos++;
5107 constraint.constraint = new_id_from_str(constraints);
5108 constraint.mode = get_irn_mode(input);
5110 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5111 ins[in_size++] = input;
5115 ir_asm_constraint constraint;
5116 constraint.pos = next_pos++;
5117 constraint.constraint = new_id_from_str("");
5118 constraint.mode = mode_M;
5120 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5121 ins[in_size++] = get_store();
5124 assert(obstack_object_size(&asm_obst)
5125 == in_size * sizeof(ir_asm_constraint));
5126 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5128 /* create asm node */
5129 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5131 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5133 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5134 out_size, output_constraints,
5135 n_clobbers, clobbers, asm_text);
5137 if (statement->is_volatile) {
5138 set_irn_pinned(node, op_pin_state_pinned);
5140 set_irn_pinned(node, op_pin_state_floats);
5143 /* create output projs & connect them */
5145 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5150 for (i = 0; i < out_size; ++i) {
5151 const expression_t *out_expr = out_exprs[i];
5153 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5154 ir_node *proj = new_Proj(node, mode, pn);
5155 ir_node *addr = out_addrs[i];
5157 set_value_for_expression_addr(out_expr, proj, addr);
5161 static void ms_try_statement_to_firm(ms_try_statement_t *statement) {
5162 statement_to_firm(statement->try_statement);
5163 warningf(&statement->base.source_position, "structured exception handling ignored");
5166 static void leave_statement_to_firm(leave_statement_t *statement) {
5167 errorf(&statement->base.source_position, "__leave not supported yet");
5171 * Transform a statement.
5173 static void statement_to_firm(statement_t *statement)
5176 assert(!statement->base.transformed);
5177 statement->base.transformed = true;
5180 switch (statement->kind) {
5181 case STATEMENT_INVALID:
5182 panic("invalid statement found");
5183 case STATEMENT_EMPTY:
5186 case STATEMENT_COMPOUND:
5187 compound_statement_to_firm(&statement->compound);
5189 case STATEMENT_RETURN:
5190 return_statement_to_firm(&statement->returns);
5192 case STATEMENT_EXPRESSION:
5193 expression_statement_to_firm(&statement->expression);
5196 if_statement_to_firm(&statement->ifs);
5198 case STATEMENT_WHILE:
5199 while_statement_to_firm(&statement->whiles);
5201 case STATEMENT_DO_WHILE:
5202 do_while_statement_to_firm(&statement->do_while);
5204 case STATEMENT_DECLARATION:
5205 declaration_statement_to_firm(&statement->declaration);
5207 case STATEMENT_BREAK:
5208 create_jump_statement(statement, get_break_label());
5210 case STATEMENT_CONTINUE:
5211 create_jump_statement(statement, continue_label);
5213 case STATEMENT_SWITCH:
5214 switch_statement_to_firm(&statement->switchs);
5216 case STATEMENT_CASE_LABEL:
5217 case_label_to_firm(&statement->case_label);
5220 for_statement_to_firm(&statement->fors);
5222 case STATEMENT_LABEL:
5223 label_to_firm(&statement->label);
5225 case STATEMENT_GOTO:
5226 goto_to_firm(&statement->gotos);
5229 asm_statement_to_firm(&statement->asms);
5231 case STATEMENT_MS_TRY:
5232 ms_try_statement_to_firm(&statement->ms_try);
5234 case STATEMENT_LEAVE:
5235 leave_statement_to_firm(&statement->leave);
5238 panic("statement not implemented");
5241 static int count_local_variables(const entity_t *entity,
5242 const entity_t *const last)
5245 for (; entity != NULL; entity = entity->base.next) {
5249 if (entity->kind == ENTITY_VARIABLE) {
5250 type = skip_typeref(entity->declaration.type);
5251 address_taken = entity->variable.address_taken;
5252 } else if (entity->kind == ENTITY_PARAMETER) {
5253 type = skip_typeref(entity->declaration.type);
5254 address_taken = entity->parameter.address_taken;
5259 if (!address_taken && is_type_scalar(type))
5268 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5270 int *const count = env;
5272 switch (stmt->kind) {
5273 case STATEMENT_DECLARATION: {
5274 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5275 *count += count_local_variables(decl_stmt->declarations_begin,
5276 decl_stmt->declarations_end);
5281 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5289 static int get_function_n_local_vars(entity_t *entity)
5293 /* count parameters */
5294 count += count_local_variables(entity->function.parameters.entities, NULL);
5296 /* count local variables declared in body */
5297 walk_statements(entity->function.statement, count_local_variables_in_stmt,
5302 static void initialize_function_parameters(entity_t *entity)
5304 assert(entity->kind == ENTITY_FUNCTION);
5305 ir_graph *irg = current_ir_graph;
5306 ir_node *args = get_irg_args(irg);
5307 ir_node *start_block = get_irg_start_block(irg);
5308 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5311 entity_t *parameter = entity->function.parameters.entities;
5312 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5313 assert(parameter->kind == ENTITY_PARAMETER);
5314 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5315 type_t *type = skip_typeref(parameter->declaration.type);
5317 bool needs_entity = parameter->parameter.address_taken;
5318 assert(!is_type_array(type));
5319 if (is_type_compound(type)) {
5320 needs_entity = true;
5324 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5325 ident *id = new_id_from_str(parameter->base.symbol->string);
5326 set_entity_ident(entity, id);
5328 parameter->declaration.kind
5329 = DECLARATION_KIND_PARAMETER_ENTITY;
5330 parameter->parameter.v.entity = entity;
5334 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5335 ir_mode *param_mode = get_type_mode(param_irtype);
5338 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5340 ir_mode *mode = get_ir_mode_storage(type);
5341 value = create_conv(NULL, value, mode);
5342 value = do_strict_conv(NULL, value);
5344 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5345 parameter->parameter.v.value_number = next_value_number_function;
5346 set_irg_loc_description(current_ir_graph, next_value_number_function,
5348 ++next_value_number_function;
5350 set_value(parameter->parameter.v.value_number, value);
5355 * Handle additional decl modifiers for IR-graphs
5357 * @param irg the IR-graph
5358 * @param dec_modifiers additional modifiers
5360 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5362 if (decl_modifiers & DM_RETURNS_TWICE) {
5363 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5364 set_irg_additional_property(irg, mtp_property_returns_twice);
5366 if (decl_modifiers & DM_NORETURN) {
5367 /* TRUE if the declaration includes the Microsoft
5368 __declspec(noreturn) specifier. */
5369 set_irg_additional_property(irg, mtp_property_noreturn);
5371 if (decl_modifiers & DM_NOTHROW) {
5372 /* TRUE if the declaration includes the Microsoft
5373 __declspec(nothrow) specifier. */
5374 set_irg_additional_property(irg, mtp_property_nothrow);
5376 if (decl_modifiers & DM_NAKED) {
5377 /* TRUE if the declaration includes the Microsoft
5378 __declspec(naked) specifier. */
5379 set_irg_additional_property(irg, mtp_property_naked);
5381 if (decl_modifiers & DM_FORCEINLINE) {
5382 /* TRUE if the declaration includes the
5383 Microsoft __forceinline specifier. */
5384 set_irg_inline_property(irg, irg_inline_forced);
5386 if (decl_modifiers & DM_NOINLINE) {
5387 /* TRUE if the declaration includes the Microsoft
5388 __declspec(noinline) specifier. */
5389 set_irg_inline_property(irg, irg_inline_forbidden);
5393 static void add_function_pointer(ir_type *segment, ir_entity *method,
5394 const char *unique_template)
5396 ir_type *method_type = get_entity_type(method);
5397 ident *id = id_unique(unique_template);
5398 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5400 ident *ide = id_unique(unique_template);
5401 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5402 ir_graph *irg = get_const_code_irg();
5403 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5406 set_entity_compiler_generated(ptr, 1);
5407 set_entity_variability(ptr, variability_constant);
5408 set_atomic_ent_value(ptr, val);
5412 * Generate possible IJmp branches to a given label block.
5414 static void gen_ijmp_branches(ir_node *block) {
5416 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5417 add_immBlock_pred(block, ijmp);
5422 * Create code for a function.
5424 static void create_function(entity_t *entity)
5426 assert(entity->kind == ENTITY_FUNCTION);
5427 ir_entity *function_entity = get_function_entity(entity);
5429 if (entity->function.statement == NULL)
5432 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5433 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5434 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5436 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5437 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5438 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5441 current_function_entity = entity;
5442 current_function_name = NULL;
5443 current_funcsig = NULL;
5445 assert(all_labels == NULL);
5446 all_labels = NEW_ARR_F(label_t *, 0);
5449 int n_local_vars = get_function_n_local_vars(entity);
5450 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5452 ir_graph *old_current_function = current_function;
5453 current_function = irg;
5455 set_irg_fp_model(irg, firm_opt.fp_model);
5456 tarval_enable_fp_ops(1);
5457 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5459 ir_node *first_block = get_cur_block();
5461 /* set inline flags */
5462 if (entity->function.is_inline)
5463 set_irg_inline_property(irg, irg_inline_recomended);
5464 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5466 next_value_number_function = 0;
5467 initialize_function_parameters(entity);
5469 statement_to_firm(entity->function.statement);
5471 ir_node *end_block = get_irg_end_block(irg);
5473 /* do we have a return statement yet? */
5474 if (get_cur_block() != NULL) {
5475 type_t *type = skip_typeref(entity->declaration.type);
5476 assert(is_type_function(type));
5477 const function_type_t *func_type = &type->function;
5478 const type_t *return_type
5479 = skip_typeref(func_type->return_type);
5482 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5483 ret = new_Return(get_store(), 0, NULL);
5486 if (is_type_scalar(return_type)) {
5487 mode = get_ir_mode_storage(func_type->return_type);
5493 /* ยง5.1.2.2.3 main implicitly returns 0 */
5494 if (is_main(entity)) {
5495 in[0] = new_Const(get_mode_null(mode));
5497 in[0] = new_Unknown(mode);
5499 ret = new_Return(get_store(), 1, in);
5501 add_immBlock_pred(end_block, ret);
5504 bool has_computed_gotos = false;
5505 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5506 label_t *label = all_labels[i];
5507 if (label->address_taken) {
5508 gen_ijmp_branches(label->block);
5509 has_computed_gotos = true;
5511 mature_immBlock(label->block);
5513 if (has_computed_gotos) {
5514 /* if we have computed goto's in the function, we cannot inline it */
5515 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5516 warningf(&entity->base.source_position,
5517 "function '%Y' can never be inlined because it contains a computed goto",
5518 entity->base.symbol);
5520 set_irg_inline_property(irg, irg_inline_forbidden);
5523 DEL_ARR_F(all_labels);
5526 mature_immBlock(first_block);
5527 mature_immBlock(end_block);
5529 irg_finalize_cons(irg);
5531 /* finalize the frame type */
5532 ir_type *frame_type = get_irg_frame_type(irg);
5533 int n = get_compound_n_members(frame_type);
5536 for (int i = 0; i < n; ++i) {
5537 ir_entity *entity = get_compound_member(frame_type, i);
5538 ir_type *entity_type = get_entity_type(entity);
5540 int align = get_type_alignment_bytes(entity_type);
5541 if (align > align_all)
5545 misalign = offset % align;
5547 offset += align - misalign;
5551 set_entity_offset(entity, offset);
5552 offset += get_type_size_bytes(entity_type);
5554 set_type_size_bytes(frame_type, offset);
5555 set_type_alignment_bytes(frame_type, align_all);
5558 current_function = old_current_function;
5560 /* create inner functions */
5562 for (inner = next_inner_function(); inner != NULL;
5563 inner = next_inner_function()) {
5564 create_function(inner);
5568 static void scope_to_firm(scope_t *scope)
5570 /* first pass: create declarations */
5571 entity_t *entity = scope->entities;
5572 for ( ; entity != NULL; entity = entity->base.next) {
5573 if (entity->base.symbol == NULL)
5576 if (entity->kind == ENTITY_FUNCTION) {
5577 get_function_entity(entity);
5578 } else if (entity->kind == ENTITY_VARIABLE) {
5579 create_global_variable(entity);
5583 /* second pass: create code/initializers */
5584 entity = scope->entities;
5585 for ( ; entity != NULL; entity = entity->base.next) {
5586 if (entity->base.symbol == NULL)
5589 if (entity->kind == ENTITY_FUNCTION) {
5590 create_function(entity);
5591 } else if (entity->kind == ENTITY_VARIABLE) {
5592 assert(entity->declaration.kind
5593 == DECLARATION_KIND_GLOBAL_VARIABLE);
5594 current_ir_graph = get_const_code_irg();
5595 create_variable_initializer(entity);
5600 void init_ast2firm(void)
5602 obstack_init(&asm_obst);
5603 init_atomic_modes();
5605 /* OS option must be set to the backend */
5606 switch (firm_opt.os_support) {
5607 case OS_SUPPORT_MINGW:
5608 create_ld_ident = create_name_win32;
5610 case OS_SUPPORT_LINUX:
5611 create_ld_ident = create_name_linux_elf;
5613 case OS_SUPPORT_MACHO:
5614 create_ld_ident = create_name_macho;
5617 panic("unexpected OS support mode");
5620 /* create idents for all known runtime functions */
5621 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5622 rts_idents[i] = new_id_from_str(rts_data[i].name);
5625 entitymap_init(&entitymap);
5628 static void init_ir_types(void)
5630 static int ir_types_initialized = 0;
5631 if (ir_types_initialized)
5633 ir_types_initialized = 1;
5635 ir_type_int = get_ir_type(type_int);
5636 ir_type_const_char = get_ir_type(type_const_char);
5637 ir_type_wchar_t = get_ir_type(type_wchar_t);
5638 ir_type_void = get_ir_type(type_void);
5640 const backend_params *be_params = be_get_backend_param();
5641 mode_float_arithmetic = be_params->mode_float_arithmetic;
5644 void exit_ast2firm(void)
5646 entitymap_destroy(&entitymap);
5647 obstack_free(&asm_obst, NULL);
5650 static void global_asm_to_firm(statement_t *s)
5652 for (; s != NULL; s = s->base.next) {
5653 assert(s->kind == STATEMENT_ASM);
5655 char const *const text = s->asms.asm_text.begin;
5656 size_t size = s->asms.asm_text.size;
5658 /* skip the last \0 */
5659 if (text[size - 1] == '\0')
5662 ident *const id = new_id_from_chars(text, size);
5667 void translation_unit_to_firm(translation_unit_t *unit)
5669 /* just to be sure */
5670 continue_label = NULL;
5672 current_switch_cond = NULL;
5673 current_translation_unit = unit;
5676 inner_functions = NEW_ARR_F(entity_t *, 0);
5678 scope_to_firm(&unit->scope);
5679 global_asm_to_firm(unit->global_asm);
5681 DEL_ARR_F(inner_functions);
5682 inner_functions = NULL;
5684 current_ir_graph = NULL;
5685 current_translation_unit = NULL;