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) {
333 * Creates a Firm type for an atomic type
335 static ir_type *create_atomic_type(const atomic_type_t *type)
337 atomic_type_kind_t kind = type->akind;
338 ir_mode *mode = atomic_modes[kind];
339 ident *id = get_mode_ident(mode);
340 ir_type *irtype = new_type_primitive(id, mode);
342 set_type_alignment_bytes(irtype, type->base.alignment);
348 * Creates a Firm type for a complex type
350 static ir_type *create_complex_type(const complex_type_t *type)
352 atomic_type_kind_t kind = type->akind;
353 ir_mode *mode = atomic_modes[kind];
354 ident *id = get_mode_ident(mode);
358 /* FIXME: finish the array */
363 * Creates a Firm type for an imaginary type
365 static ir_type *create_imaginary_type(const imaginary_type_t *type)
367 atomic_type_kind_t kind = type->akind;
368 ir_mode *mode = atomic_modes[kind];
369 ident *id = get_mode_ident(mode);
370 ir_type *irtype = new_type_primitive(id, mode);
372 set_type_alignment_bytes(irtype, type->base.alignment);
378 * return type of a parameter (and take transparent union gnu extension into
381 static type_t *get_parameter_type(type_t *type)
383 type = skip_typeref(type);
384 if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
385 compound_t *compound = type->compound.compound;
386 type = compound->members.entities->declaration.type;
392 static ir_type *create_method_type(const function_type_t *function_type)
394 type_t *return_type = skip_typeref(function_type->return_type);
396 ident *id = id_unique("functiontype.%u");
397 int n_parameters = count_parameters(function_type);
398 int n_results = return_type == type_void ? 0 : 1;
399 ir_type *irtype = new_type_method(id, n_parameters, n_results);
401 if (return_type != type_void) {
402 ir_type *restype = get_ir_type(return_type);
403 set_method_res_type(irtype, 0, restype);
406 function_parameter_t *parameter = function_type->parameters;
408 for ( ; parameter != NULL; parameter = parameter->next) {
409 type_t *type = get_parameter_type(parameter->type);
410 ir_type *p_irtype = get_ir_type(type);
411 set_method_param_type(irtype, n, p_irtype);
415 if (function_type->variadic || function_type->unspecified_parameters) {
416 set_method_variadicity(irtype, variadicity_variadic);
419 unsigned cc = get_method_calling_convention(irtype);
420 switch (function_type->calling_convention) {
421 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
424 set_method_calling_convention(irtype, SET_CDECL(cc));
428 if (function_type->variadic || function_type->unspecified_parameters)
431 /* only non-variadic function can use stdcall, else use cdecl */
432 set_method_calling_convention(irtype, SET_STDCALL(cc));
436 if (function_type->variadic || function_type->unspecified_parameters)
438 /* only non-variadic function can use fastcall, else use cdecl */
439 set_method_calling_convention(irtype, SET_FASTCALL(cc));
443 /* Hmm, leave default, not accepted by the parser yet. */
450 static ir_type *create_pointer_type(pointer_type_t *type)
452 type_t *points_to = type->points_to;
453 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
454 ir_type *ir_type = new_type_pointer(id_unique("pointer.%u"),
455 ir_points_to, mode_P_data);
460 static ir_type *create_reference_type(reference_type_t *type)
462 type_t *refers_to = type->refers_to;
463 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
464 ir_type *ir_type = new_type_pointer(id_unique("reference.%u"),
465 ir_refers_to, mode_P_data);
470 static ir_type *create_array_type(array_type_t *type)
472 type_t *element_type = type->element_type;
473 ir_type *ir_element_type = get_ir_type(element_type);
475 ident *id = id_unique("array.%u");
476 ir_type *ir_type = new_type_array(id, 1, ir_element_type);
478 const int align = get_type_alignment_bytes(ir_element_type);
479 set_type_alignment_bytes(ir_type, align);
481 if (type->size_constant) {
482 int n_elements = type->size;
484 set_array_bounds_int(ir_type, 0, 0, n_elements);
486 size_t elemsize = get_type_size_bytes(ir_element_type);
487 if (elemsize % align > 0) {
488 elemsize += align - (elemsize % align);
490 set_type_size_bytes(ir_type, n_elements * elemsize);
492 set_array_lower_bound_int(ir_type, 0, 0);
494 set_type_state(ir_type, layout_fixed);
500 * Return the signed integer type of size bits.
502 * @param size the size
504 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
507 static ir_mode *s_modes[64 + 1] = {NULL, };
511 if (size <= 0 || size > 64)
514 mode = s_modes[size];
518 snprintf(name, sizeof(name), "bf_I%u", size);
519 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
520 size <= 32 ? 32 : size );
521 s_modes[size] = mode;
525 snprintf(name, sizeof(name), "I%u", size);
526 ident *id = new_id_from_str(name);
527 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
528 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
529 set_primitive_base_type(res, base_tp);
535 * Return the unsigned integer type of size bits.
537 * @param size the size
539 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
542 static ir_mode *u_modes[64 + 1] = {NULL, };
546 if (size <= 0 || size > 64)
549 mode = u_modes[size];
553 snprintf(name, sizeof(name), "bf_U%u", size);
554 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
555 size <= 32 ? 32 : size );
556 u_modes[size] = mode;
561 snprintf(name, sizeof(name), "U%u", size);
562 ident *id = new_id_from_str(name);
563 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
564 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
565 set_primitive_base_type(res, base_tp);
570 static ir_type *create_bitfield_type(bitfield_type_t *const type)
572 type_t *base = skip_typeref(type->base_type);
573 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
574 ir_type *irbase = get_ir_type(base);
576 unsigned size = type->bit_size;
578 assert(!is_type_float(base));
579 if (is_type_signed(base)) {
580 return get_signed_int_type_for_bit_size(irbase, size);
582 return get_unsigned_int_type_for_bit_size(irbase, size);
586 #define INVALID_TYPE ((ir_type_ptr)-1)
589 COMPOUND_IS_STRUCT = false,
590 COMPOUND_IS_UNION = true
594 * Construct firm type from ast struct type.
596 * As anonymous inner structs get flattened to a single firm type, we might get
597 * irtype, outer_offset and out_align passed (they represent the position of
598 * the anonymous inner struct inside the resulting firm struct)
600 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
601 size_t *outer_offset, size_t *outer_align,
602 bool incomplete, bool is_union)
604 compound_t *compound = type->compound;
606 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
607 return compound->irtype;
610 size_t align_all = 1;
612 size_t bit_offset = 0;
615 if (irtype == NULL) {
616 symbol_t *symbol = compound->base.symbol;
618 if (symbol != NULL) {
619 id = new_id_from_str(symbol->string);
622 id = id_unique("__anonymous_union.%u");
624 id = id_unique("__anonymous_struct.%u");
627 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
630 irtype = new_d_type_union(id, dbgi);
632 irtype = new_d_type_struct(id, dbgi);
635 compound->irtype_complete = false;
636 compound->irtype = irtype;
638 offset = *outer_offset;
639 align_all = *outer_align;
645 compound->irtype_complete = true;
647 entity_t *entry = compound->members.entities;
648 for ( ; entry != NULL; entry = entry->base.next) {
649 if (entry->kind != ENTITY_COMPOUND_MEMBER)
652 size_t prev_offset = offset;
654 symbol_t *symbol = entry->base.symbol;
655 type_t *entry_type = skip_typeref(entry->declaration.type);
656 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
659 if (symbol != NULL) {
660 ident = new_id_from_str(symbol->string);
662 if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
663 create_compound_type(&entry_type->compound, irtype, &offset,
664 &align_all, false, COMPOUND_IS_STRUCT);
665 goto finished_member;
666 } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
667 create_compound_type(&entry_type->compound, irtype, &offset,
668 &align_all, false, COMPOUND_IS_UNION);
669 goto finished_member;
671 assert(entry_type->kind == TYPE_BITFIELD);
673 ident = id_unique("anon.%u");
676 ir_type *base_irtype;
677 if (entry_type->kind == TYPE_BITFIELD) {
678 base_irtype = get_ir_type(entry_type->bitfield.base_type);
680 base_irtype = get_ir_type(entry_type);
683 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
684 size_t misalign = offset % entry_alignment;
686 ir_type *entry_irtype = get_ir_type(entry_type);
687 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
690 size_t bits_remainder;
691 if (entry_type->kind == TYPE_BITFIELD) {
692 size_t size_bits = entry_type->bitfield.bit_size;
693 size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
695 if (size_bits > rest_size_bits) {
696 /* start a new bucket */
697 offset += entry_alignment - misalign;
703 /* put into current bucket */
704 base = offset - misalign;
705 bits_remainder = misalign * 8 + bit_offset;
708 offset += size_bits / 8;
709 bit_offset = bit_offset + (size_bits % 8);
711 size_t entry_size = get_type_size_bytes(base_irtype);
712 if (misalign > 0 || bit_offset > 0)
713 offset += entry_alignment - misalign;
717 offset += entry_size;
721 if (entry_alignment > align_all) {
722 if (entry_alignment % align_all != 0) {
723 panic("uneven alignments not supported yet");
725 align_all = entry_alignment;
728 set_entity_offset(entity, base);
729 set_entity_offset_bits_remainder(entity,
730 (unsigned char) bits_remainder);
731 //add_struct_member(irtype, entity);
732 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
733 assert(entry->compound_member.entity == NULL);
734 entry->compound_member.entity = entity;
738 size_t entry_size = offset - prev_offset;
739 if (entry_size > size) {
751 size_t misalign = offset % align_all;
752 if (misalign > 0 || bit_offset > 0) {
753 size += align_all - misalign;
756 if (outer_offset != NULL) {
758 *outer_offset = offset;
760 *outer_offset += size;
763 if (align_all > *outer_align) {
764 if (align_all % *outer_align != 0) {
765 panic("uneven alignments not supported yet");
767 *outer_align = align_all;
770 set_type_alignment_bytes(irtype, align_all);
771 set_type_size_bytes(irtype, size);
772 set_type_state(irtype, layout_fixed);
778 static ir_type *create_enum_type(enum_type_t *const type)
780 type->base.firm_type = ir_type_int;
782 ir_mode *const mode = mode_int;
783 tarval *const one = get_mode_one(mode);
784 tarval * tv_next = get_tarval_null(mode);
786 bool constant_folding_old = constant_folding;
787 constant_folding = true;
789 enum_t *enume = type->enume;
790 entity_t *entry = enume->base.next;
791 for (; entry != NULL; entry = entry->base.next) {
792 if (entry->kind != ENTITY_ENUM_VALUE)
795 expression_t *const init = entry->enum_value.value;
797 ir_node *const cnst = expression_to_firm(init);
798 if (!is_Const(cnst)) {
799 panic("couldn't fold constant");
801 tv_next = get_Const_tarval(cnst);
803 entry->enum_value.tv = tv_next;
804 tv_next = tarval_add(tv_next, one);
807 constant_folding = constant_folding_old;
812 static ir_type *get_ir_type_incomplete(type_t *type)
814 assert(type != NULL);
815 type = skip_typeref(type);
817 if (type->base.firm_type != NULL) {
818 assert(type->base.firm_type != INVALID_TYPE);
819 return type->base.firm_type;
822 switch (type->kind) {
823 case TYPE_COMPOUND_STRUCT:
824 return create_compound_type(&type->compound, NULL, NULL, NULL,
825 true, COMPOUND_IS_STRUCT);
826 case TYPE_COMPOUND_UNION:
827 return create_compound_type(&type->compound, NULL, NULL, NULL,
828 true, COMPOUND_IS_UNION);
830 return get_ir_type(type);
834 ir_type *get_ir_type(type_t *type)
836 assert(type != NULL);
838 type = skip_typeref(type);
840 if (type->base.firm_type != NULL) {
841 assert(type->base.firm_type != INVALID_TYPE);
842 return type->base.firm_type;
845 ir_type *firm_type = NULL;
846 switch (type->kind) {
848 /* Happens while constant folding, when there was an error */
849 return create_atomic_type(&type_void->atomic);
852 firm_type = create_atomic_type(&type->atomic);
855 firm_type = create_complex_type(&type->complex);
858 firm_type = create_imaginary_type(&type->imaginary);
861 firm_type = create_method_type(&type->function);
864 firm_type = create_pointer_type(&type->pointer);
867 firm_type = create_reference_type(&type->reference);
870 firm_type = create_array_type(&type->array);
872 case TYPE_COMPOUND_STRUCT:
873 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
874 false, COMPOUND_IS_STRUCT);
876 case TYPE_COMPOUND_UNION:
877 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
878 false, COMPOUND_IS_UNION);
881 firm_type = create_enum_type(&type->enumt);
884 firm_type = get_ir_type(type->builtin.real_type);
887 firm_type = create_bitfield_type(&type->bitfield);
895 if (firm_type == NULL)
896 panic("unknown type found");
898 type->base.firm_type = firm_type;
902 static ir_mode *get_ir_mode_storage(type_t *type)
904 ir_type *irtype = get_ir_type(type);
906 /* firm doesn't report a mode for arrays somehow... */
907 if (is_Array_type(irtype)) {
911 ir_mode *mode = get_type_mode(irtype);
912 assert(mode != NULL);
916 static ir_mode *get_ir_mode_arithmetic(type_t *type)
918 ir_mode *mode = get_ir_mode_storage(type);
919 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
920 return mode_float_arithmetic;
926 /** Names of the runtime functions. */
927 static const struct {
928 int id; /**< the rts id */
929 int n_res; /**< number of return values */
930 const char *name; /**< the name of the rts function */
931 int n_params; /**< number of parameters */
932 unsigned flags; /**< language flags */
934 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
935 { rts_abort, 0, "abort", 0, _C89 },
936 { rts_alloca, 1, "alloca", 1, _ALL },
937 { rts_abs, 1, "abs", 1, _C89 },
938 { rts_labs, 1, "labs", 1, _C89 },
939 { rts_llabs, 1, "llabs", 1, _C99 },
940 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
942 { rts_fabs, 1, "fabs", 1, _C89 },
943 { rts_sqrt, 1, "sqrt", 1, _C89 },
944 { rts_cbrt, 1, "cbrt", 1, _C99 },
945 { rts_exp, 1, "exp", 1, _C89 },
946 { rts_exp2, 1, "exp2", 1, _C89 },
947 { rts_exp10, 1, "exp10", 1, _GNUC },
948 { rts_log, 1, "log", 1, _C89 },
949 { rts_log2, 1, "log2", 1, _C89 },
950 { rts_log10, 1, "log10", 1, _C89 },
951 { rts_pow, 1, "pow", 2, _C89 },
952 { rts_sin, 1, "sin", 1, _C89 },
953 { rts_cos, 1, "cos", 1, _C89 },
954 { rts_tan, 1, "tan", 1, _C89 },
955 { rts_asin, 1, "asin", 1, _C89 },
956 { rts_acos, 1, "acos", 1, _C89 },
957 { rts_atan, 1, "atan", 1, _C89 },
958 { rts_sinh, 1, "sinh", 1, _C89 },
959 { rts_cosh, 1, "cosh", 1, _C89 },
960 { rts_tanh, 1, "tanh", 1, _C89 },
962 { rts_fabsf, 1, "fabsf", 1, _C99 },
963 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
964 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
965 { rts_expf, 1, "expf", 1, _C99 },
966 { rts_exp2f, 1, "exp2f", 1, _C99 },
967 { rts_exp10f, 1, "exp10f", 1, _GNUC },
968 { rts_logf, 1, "logf", 1, _C99 },
969 { rts_log2f, 1, "log2f", 1, _C99 },
970 { rts_log10f, 1, "log10f", 1, _C99 },
971 { rts_powf, 1, "powf", 2, _C99 },
972 { rts_sinf, 1, "sinf", 1, _C99 },
973 { rts_cosf, 1, "cosf", 1, _C99 },
974 { rts_tanf, 1, "tanf", 1, _C99 },
975 { rts_asinf, 1, "asinf", 1, _C99 },
976 { rts_acosf, 1, "acosf", 1, _C99 },
977 { rts_atanf, 1, "atanf", 1, _C99 },
978 { rts_sinhf, 1, "sinhf", 1, _C99 },
979 { rts_coshf, 1, "coshf", 1, _C99 },
980 { rts_tanhf, 1, "tanhf", 1, _C99 },
982 { rts_fabsl, 1, "fabsl", 1, _C99 },
983 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
984 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
985 { rts_expl, 1, "expl", 1, _C99 },
986 { rts_exp2l, 1, "exp2l", 1, _C99 },
987 { rts_exp10l, 1, "exp10l", 1, _GNUC },
988 { rts_logl, 1, "logl", 1, _C99 },
989 { rts_log2l, 1, "log2l", 1, _C99 },
990 { rts_log10l, 1, "log10l", 1, _C99 },
991 { rts_powl, 1, "powl", 2, _C99 },
992 { rts_sinl, 1, "sinl", 1, _C99 },
993 { rts_cosl, 1, "cosl", 1, _C99 },
994 { rts_tanl, 1, "tanl", 1, _C99 },
995 { rts_asinl, 1, "asinl", 1, _C99 },
996 { rts_acosl, 1, "acosl", 1, _C99 },
997 { rts_atanl, 1, "atanl", 1, _C99 },
998 { rts_sinhl, 1, "sinhl", 1, _C99 },
999 { rts_coshl, 1, "coshl", 1, _C99 },
1000 { rts_tanhl, 1, "tanhl", 1, _C99 },
1002 { rts_memcpy, 1, "memcpy", 3, _C89 }, /* HMM, man say its C99 */
1003 { rts_memset, 1, "memset", 3, _C89 }, /* HMM, man say its C99 */
1004 { rts_strcmp, 1, "strcmp", 2, _C89 },
1005 { rts_strncmp, 1, "strncmp", 3, _C89 }
1008 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
1010 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
1013 * Handle GNU attributes for entities
1015 * @param ent the entity
1016 * @param decl the routine declaration
1018 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
1020 assert(is_declaration(entity));
1021 decl_modifiers_t modifiers = entity->declaration.modifiers;
1022 if (modifiers & DM_PURE) {
1023 /* TRUE if the declaration includes the GNU
1024 __attribute__((pure)) specifier. */
1025 set_entity_additional_property(irentity, mtp_property_pure);
1027 if (modifiers & DM_CONST) {
1028 set_entity_additional_property(irentity, mtp_property_const);
1029 have_const_functions = true;
1031 if (modifiers & DM_USED) {
1032 /* TRUE if the declaration includes the GNU
1033 __attribute__((used)) specifier. */
1034 set_entity_stickyness(irentity, stickyness_sticky);
1038 static bool is_main(entity_t *entity)
1040 static symbol_t *sym_main = NULL;
1041 if (sym_main == NULL) {
1042 sym_main = symbol_table_insert("main");
1045 if (entity->base.symbol != sym_main)
1047 /* must be in outermost scope */
1048 if (entity->base.parent_scope != ¤t_translation_unit->scope)
1055 * Creates an entity representing a function.
1057 * @param declaration the function declaration
1059 static ir_entity *get_function_entity(entity_t *entity)
1061 assert(entity->kind == ENTITY_FUNCTION);
1062 if (entity->function.entity != NULL) {
1063 return entity->function.entity;
1066 if (is_main(entity)) {
1067 /* force main to C linkage */
1068 type_t *type = entity->declaration.type;
1069 assert(is_type_function(type));
1070 if (type->function.linkage != LINKAGE_C) {
1071 type_t *new_type = duplicate_type(type);
1072 new_type->function.linkage = LINKAGE_C;
1074 type = typehash_insert(new_type);
1075 if (type != new_type) {
1076 obstack_free(type_obst, new_type);
1078 entity->declaration.type = type;
1082 symbol_t *symbol = entity->base.symbol;
1083 ident *id = new_id_from_str(symbol->string);
1085 ir_type *global_type = get_glob_type();
1086 ir_type *ir_type_method = get_ir_type(entity->declaration.type);
1087 bool const has_body = entity->function.statement != NULL;
1089 /* already an entity defined? */
1090 ir_entity *irentity = entitymap_get(&entitymap, symbol);
1091 if (irentity != NULL) {
1092 if (get_entity_visibility(irentity) == visibility_external_allocated
1094 set_entity_visibility(irentity, visibility_external_visible);
1096 goto entity_created;
1099 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1100 irentity = new_d_entity(global_type, id, ir_type_method, dbgi);
1101 set_entity_ld_ident(irentity, create_ld_ident(entity));
1103 handle_gnu_attributes_ent(irentity, entity);
1105 /* static inline => local
1106 * extern inline => local
1107 * inline without definition => local
1108 * inline with definition => external_visible */
1109 storage_class_tag_t const storage_class
1110 = (storage_class_tag_t) entity->declaration.storage_class;
1111 bool const is_inline = entity->function.is_inline;
1112 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1113 set_entity_visibility(irentity, visibility_external_visible);
1114 } else if (storage_class == STORAGE_CLASS_STATIC ||
1115 (is_inline && has_body)) {
1117 /* this entity was declared, but is defined nowhere */
1118 set_entity_peculiarity(irentity, peculiarity_description);
1120 set_entity_visibility(irentity, visibility_local);
1121 } else if (has_body) {
1122 set_entity_visibility(irentity, visibility_external_visible);
1124 set_entity_visibility(irentity, visibility_external_allocated);
1126 set_entity_allocation(irentity, allocation_static);
1128 /* We should check for file scope here, but as long as we compile C only
1129 this is not needed. */
1130 if (! firm_opt.freestanding) {
1131 /* check for a known runtime function */
1132 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1133 if (id != rts_idents[i])
1136 /* ignore those rts functions not necessary needed for current mode */
1137 if ((c_mode & rts_data[i].flags) == 0)
1139 assert(rts_entities[rts_data[i].id] == NULL);
1140 rts_entities[rts_data[i].id] = irentity;
1144 entitymap_insert(&entitymap, symbol, irentity);
1147 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1148 entity->function.entity = irentity;
1153 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1155 ir_mode *value_mode = get_irn_mode(value);
1157 if (value_mode == dest_mode || is_Bad(value))
1160 if (dest_mode == mode_b) {
1161 ir_node *zero = new_Const(get_mode_null(value_mode));
1162 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
1163 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1167 return new_d_Conv(dbgi, value, dest_mode);
1171 * Creates a Const node representing a constant.
1173 static ir_node *const_to_firm(const const_expression_t *cnst)
1175 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1176 type_t *type = skip_typeref(cnst->base.type);
1177 ir_mode *mode = get_ir_mode_storage(type);
1182 if (mode_is_float(mode)) {
1183 tv = new_tarval_from_double(cnst->v.float_value, mode);
1185 if (mode_is_signed(mode)) {
1186 len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1188 len = snprintf(buf, sizeof(buf), "%llu",
1189 (unsigned long long) cnst->v.int_value);
1191 tv = new_tarval_from_str(buf, len, mode);
1194 ir_node *res = new_d_Const(dbgi, tv);
1195 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1196 return create_conv(dbgi, res, mode_arith);
1200 * Creates a Const node representing a character constant.
1202 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1204 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1205 ir_mode *mode = get_ir_mode_arithmetic(cnst->base.type);
1207 long long int v = 0;
1208 for (size_t i = 0; i < cnst->v.character.size; ++i) {
1209 if (char_is_signed) {
1210 v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1212 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1216 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1217 tarval *tv = new_tarval_from_str(buf, len, mode);
1219 return new_d_Const(dbgi, tv);
1223 * Creates a Const node representing a wide character constant.
1225 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1227 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1228 ir_mode *mode = get_ir_mode_arithmetic(cnst->base.type);
1230 long long int v = cnst->v.wide_character.begin[0];
1233 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1234 tarval *tv = new_tarval_from_str(buf, len, mode);
1236 return new_d_Const(dbgi, tv);
1240 * Creates a SymConst for a given entity.
1242 * @param dbgi debug info
1243 * @param mode the (reference) mode for the SymConst
1244 * @param entity the entity
1246 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1249 assert(entity != NULL);
1250 union symconst_symbol sym;
1251 sym.entity_p = entity;
1252 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1256 * Creates a SymConst node representing a string constant.
1258 * @param src_pos the source position of the string constant
1259 * @param id_prefix a prefix for the name of the generated string constant
1260 * @param value the value of the string constant
1262 static ir_node *string_to_firm(const source_position_t *const src_pos,
1263 const char *const id_prefix,
1264 const string_t *const value)
1266 ir_type *const global_type = get_glob_type();
1267 dbg_info *const dbgi = get_dbg_info(src_pos);
1268 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1269 ir_type_const_char, dbgi);
1271 ident *const id = id_unique(id_prefix);
1272 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1273 set_entity_ld_ident(entity, id);
1274 set_entity_variability(entity, variability_constant);
1275 set_entity_allocation(entity, allocation_static);
1277 ir_type *const elem_type = ir_type_const_char;
1278 ir_mode *const mode = get_type_mode(elem_type);
1280 const char* const string = value->begin;
1281 const size_t slen = value->size;
1283 set_array_lower_bound_int(type, 0, 0);
1284 set_array_upper_bound_int(type, 0, slen);
1285 set_type_size_bytes(type, slen);
1286 set_type_state(type, layout_fixed);
1288 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1289 for (size_t i = 0; i < slen; ++i) {
1290 tvs[i] = new_tarval_from_long(string[i], mode);
1293 set_array_entity_values(entity, tvs, slen);
1296 return create_symconst(dbgi, mode_P_data, entity);
1300 * Creates a SymConst node representing a string literal.
1302 * @param literal the string literal
1304 static ir_node *string_literal_to_firm(
1305 const string_literal_expression_t* literal)
1307 return string_to_firm(&literal->base.source_position, "Lstr.%u",
1312 * Creates a SymConst node representing a wide string literal.
1314 * @param literal the wide string literal
1316 static ir_node *wide_string_literal_to_firm(
1317 const wide_string_literal_expression_t* const literal)
1319 ir_type *const global_type = get_glob_type();
1320 ir_type *const elem_type = ir_type_wchar_t;
1321 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1322 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1325 ident *const id = id_unique("Lstr.%u");
1326 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1327 set_entity_ld_ident(entity, id);
1328 set_entity_variability(entity, variability_constant);
1329 set_entity_allocation(entity, allocation_static);
1331 ir_mode *const mode = get_type_mode(elem_type);
1333 const wchar_rep_t *const string = literal->value.begin;
1334 const size_t slen = literal->value.size;
1336 set_array_lower_bound_int(type, 0, 0);
1337 set_array_upper_bound_int(type, 0, slen);
1338 set_type_size_bytes(type, slen);
1339 set_type_state(type, layout_fixed);
1341 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1342 for (size_t i = 0; i < slen; ++i) {
1343 tvs[i] = new_tarval_from_long(string[i], mode);
1346 set_array_entity_values(entity, tvs, slen);
1349 return create_symconst(dbgi, mode_P_data, entity);
1352 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1353 ir_node *const addr)
1355 ir_type *irtype = get_ir_type(type);
1356 if (is_compound_type(irtype)
1357 || is_Method_type(irtype)
1358 || is_Array_type(irtype)) {
1362 ir_mode *const mode = get_type_mode(irtype);
1363 ir_node *const memory = get_store();
1364 ir_node *const load = new_d_Load(dbgi, memory, addr, mode);
1365 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1366 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1368 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE && !is_Bad(load)) {
1369 set_Load_volatility(load, volatility_is_volatile);
1372 set_store(load_mem);
1374 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1375 return create_conv(dbgi, load_res, mode_arithmetic);
1379 * Creates a strict Conv if neccessary.
1381 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1383 ir_mode *mode = get_irn_mode(node);
1385 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1387 if (!mode_is_float(mode))
1390 /* check if there is already a Conv */
1391 if (is_Conv(node)) {
1392 /* convert it into a strict Conv */
1393 set_Conv_strict(node, 1);
1397 /* otherwise create a new one */
1398 return new_d_strictConv(dbgi, node, mode);
1401 static ir_node *get_global_var_address(dbg_info *const dbgi,
1402 const entity_t *const entity)
1404 assert(entity->kind == ENTITY_VARIABLE);
1405 assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1407 ir_entity *const irentity = entity->variable.v.entity;
1408 if (entity->variable.thread_local) {
1409 ir_node *const no_mem = new_NoMem();
1410 ir_node *const tls = get_irg_tls(current_ir_graph);
1411 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1413 return create_symconst(dbgi, mode_P_data, irentity);
1418 * Returns the correct base address depending on whether it is a parameter or a
1419 * normal local variable.
1421 static ir_node *get_local_frame(ir_entity *const ent)
1423 ir_graph *const irg = current_ir_graph;
1424 const ir_type *const owner = get_entity_owner(ent);
1425 if (owner == get_irg_frame_type(irg)) {
1426 return get_irg_frame(irg);
1428 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1429 return get_irg_value_param_base(irg);
1434 * Keep all memory edges of the given block.
1436 static void keep_all_memory(ir_node *block) {
1437 ir_node *old = get_cur_block();
1439 set_cur_block(block);
1440 keep_alive(get_store());
1441 /* TODO: keep all memory edges from restricted pointers */
1445 static ir_node *reference_expression_enum_value_to_firm(
1446 const reference_expression_t *ref)
1448 entity_t *entity = ref->entity;
1449 type_t *type = skip_typeref(entity->enum_value.enum_type);
1450 /* make sure the type is constructed */
1451 (void) get_ir_type(type);
1453 return new_Const(entity->enum_value.tv);
1456 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1458 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1459 entity_t *entity = ref->entity;
1460 assert(is_declaration(entity));
1461 type_t *type = skip_typeref(entity->declaration.type);
1463 /* make sure the type is constructed */
1464 (void) get_ir_type(type);
1466 switch ((declaration_kind_t) entity->declaration.kind) {
1467 case DECLARATION_KIND_UNKNOWN:
1470 case DECLARATION_KIND_LOCAL_VARIABLE: {
1471 ir_mode *const mode = get_ir_mode_storage(type);
1472 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1473 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1475 case DECLARATION_KIND_PARAMETER: {
1476 ir_mode *const mode = get_ir_mode_storage(type);
1477 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1478 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1480 case DECLARATION_KIND_FUNCTION: {
1481 ir_mode *const mode = get_ir_mode_storage(type);
1482 return create_symconst(dbgi, mode, entity->function.entity);
1484 case DECLARATION_KIND_INNER_FUNCTION: {
1485 ir_mode *const mode = get_ir_mode_storage(type);
1486 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1487 /* inner function not using the closure */
1488 return create_symconst(dbgi, mode, entity->function.entity);
1490 /* TODO: need trampoline here */
1491 panic("Trampoline code not implemented");
1492 return create_symconst(dbgi, mode, entity->function.entity);
1495 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1496 ir_node *const addr = get_global_var_address(dbgi, entity);
1497 return deref_address(dbgi, entity->declaration.type, addr);
1500 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1501 ir_entity *irentity = entity->variable.v.entity;
1502 ir_node *frame = get_local_frame(irentity);
1503 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1504 return deref_address(dbgi, entity->declaration.type, sel);
1506 case DECLARATION_KIND_PARAMETER_ENTITY: {
1507 ir_entity *irentity = entity->parameter.v.entity;
1508 ir_node *frame = get_local_frame(irentity);
1509 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1510 return deref_address(dbgi, entity->declaration.type, sel);
1513 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1514 return entity->variable.v.vla_base;
1516 case DECLARATION_KIND_COMPOUND_MEMBER:
1517 panic("not implemented reference type");
1520 panic("reference to declaration with unknown type found");
1523 static ir_node *reference_addr(const reference_expression_t *ref)
1525 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1526 entity_t *entity = ref->entity;
1527 assert(is_declaration(entity));
1529 switch((declaration_kind_t) entity->declaration.kind) {
1530 case DECLARATION_KIND_UNKNOWN:
1532 case DECLARATION_KIND_PARAMETER:
1533 case DECLARATION_KIND_LOCAL_VARIABLE:
1534 /* you can store to a local variable (so we don't panic but return NULL
1535 * as an indicator for no real address) */
1537 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1538 ir_node *const addr = get_global_var_address(dbgi, entity);
1541 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1542 ir_entity *irentity = entity->variable.v.entity;
1543 ir_node *frame = get_local_frame(irentity);
1544 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1548 case DECLARATION_KIND_PARAMETER_ENTITY: {
1549 ir_entity *irentity = entity->parameter.v.entity;
1550 ir_node *frame = get_local_frame(irentity);
1551 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1556 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1557 return entity->variable.v.vla_base;
1559 case DECLARATION_KIND_FUNCTION: {
1560 type_t *const type = skip_typeref(entity->declaration.type);
1561 ir_mode *const mode = get_ir_mode_storage(type);
1562 return create_symconst(dbgi, mode, entity->function.entity);
1565 case DECLARATION_KIND_INNER_FUNCTION:
1566 case DECLARATION_KIND_COMPOUND_MEMBER:
1567 panic("not implemented reference type");
1570 panic("reference to declaration with unknown type found");
1574 * Transform calls to builtin functions.
1576 static ir_node *process_builtin_call(const call_expression_t *call)
1578 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1580 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1581 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1583 type_t *type = skip_typeref(builtin->base.type);
1584 assert(is_type_pointer(type));
1586 type_t *function_type = skip_typeref(type->pointer.points_to);
1587 symbol_t *symbol = builtin->symbol;
1589 switch(symbol->ID) {
1590 case T___builtin_alloca: {
1591 if (call->arguments == NULL || call->arguments->next != NULL) {
1592 panic("invalid number of parameters on __builtin_alloca");
1594 expression_t *argument = call->arguments->expression;
1595 ir_node *size = expression_to_firm(argument);
1597 ir_node *store = get_store();
1598 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1600 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1602 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1607 case T___builtin_huge_val:
1608 case T___builtin_inf:
1609 case T___builtin_inff:
1610 case T___builtin_infl: {
1611 type_t *type = function_type->function.return_type;
1612 ir_mode *mode = get_ir_mode_arithmetic(type);
1613 tarval *tv = get_mode_infinite(mode);
1614 ir_node *res = new_d_Const(dbgi, tv);
1617 case T___builtin_nan:
1618 case T___builtin_nanf:
1619 case T___builtin_nanl: {
1620 /* Ignore string for now... */
1621 assert(is_type_function(function_type));
1622 type_t *type = function_type->function.return_type;
1623 ir_mode *mode = get_ir_mode_arithmetic(type);
1624 tarval *tv = get_mode_NAN(mode);
1625 ir_node *res = new_d_Const(dbgi, tv);
1628 case T___builtin_expect: {
1629 expression_t *argument = call->arguments->expression;
1630 return _expression_to_firm(argument);
1632 case T___builtin_va_end:
1633 /* evaluate the argument of va_end for its side effects */
1634 _expression_to_firm(call->arguments->expression);
1637 panic("unsupported builtin found");
1642 * Transform a call expression.
1643 * Handles some special cases, like alloca() calls, which must be resolved
1644 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1645 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1648 static ir_node *call_expression_to_firm(const call_expression_t *call)
1650 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1651 assert(get_cur_block() != NULL);
1653 expression_t *function = call->function;
1654 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1655 return process_builtin_call(call);
1657 if (function->kind == EXPR_REFERENCE) {
1658 const reference_expression_t *ref = &function->reference;
1659 entity_t *entity = ref->entity;
1661 if (entity->kind == ENTITY_FUNCTION
1662 && entity->function.entity == rts_entities[rts_alloca]) {
1663 /* handle alloca() call */
1664 expression_t *argument = call->arguments->expression;
1665 ir_node *size = expression_to_firm(argument);
1666 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
1668 size = create_conv(dbgi, size, mode);
1670 ir_node *store = get_store();
1671 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1672 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1674 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1676 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1681 ir_node *callee = expression_to_firm(function);
1683 type_t *type = skip_typeref(function->base.type);
1684 assert(is_type_pointer(type));
1685 pointer_type_t *pointer_type = &type->pointer;
1686 type_t *points_to = skip_typeref(pointer_type->points_to);
1687 assert(is_type_function(points_to));
1688 function_type_t *function_type = &points_to->function;
1690 int n_parameters = 0;
1691 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1692 ir_type *new_method_type = NULL;
1693 if (function_type->variadic || function_type->unspecified_parameters) {
1694 const call_argument_t *argument = call->arguments;
1695 for ( ; argument != NULL; argument = argument->next) {
1699 /* we need to construct a new method type matching the call
1701 int n_res = get_method_n_ress(ir_method_type);
1702 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1703 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1704 n_parameters, n_res, dbgi);
1705 set_method_calling_convention(new_method_type,
1706 get_method_calling_convention(ir_method_type));
1707 set_method_additional_properties(new_method_type,
1708 get_method_additional_properties(ir_method_type));
1709 set_method_variadicity(new_method_type,
1710 get_method_variadicity(ir_method_type));
1712 for (int i = 0; i < n_res; ++i) {
1713 set_method_res_type(new_method_type, i,
1714 get_method_res_type(ir_method_type, i));
1716 argument = call->arguments;
1717 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1718 expression_t *expression = argument->expression;
1719 ir_type *irtype = get_ir_type(expression->base.type);
1720 set_method_param_type(new_method_type, i, irtype);
1722 ir_method_type = new_method_type;
1724 n_parameters = get_method_n_params(ir_method_type);
1727 ir_node *in[n_parameters];
1729 const call_argument_t *argument = call->arguments;
1730 for (int n = 0; n < n_parameters; ++n) {
1731 expression_t *expression = argument->expression;
1732 ir_node *arg_node = expression_to_firm(expression);
1734 type_t *type = skip_typeref(expression->base.type);
1735 if (!is_type_compound(type)) {
1736 ir_mode *mode = get_ir_mode_storage(expression->base.type);
1737 arg_node = create_conv(dbgi, arg_node, mode);
1738 arg_node = do_strict_conv(dbgi, arg_node);
1743 argument = argument->next;
1746 ir_node *store = get_store();
1747 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1749 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1752 type_t *return_type = skip_typeref(function_type->return_type);
1753 ir_node *result = NULL;
1755 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1756 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1758 if (is_type_scalar(return_type)) {
1759 ir_mode *mode = get_ir_mode_storage(return_type);
1760 result = new_d_Proj(dbgi, resproj, mode, 0);
1761 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1762 result = create_conv(NULL, result, mode_arith);
1764 ir_mode *mode = mode_P_data;
1765 result = new_d_Proj(dbgi, resproj, mode, 0);
1769 if (function->kind == EXPR_REFERENCE &&
1770 function->reference.entity->declaration.modifiers & DM_NORETURN) {
1771 /* A dead end: Keep the Call and the Block. Also place all further
1772 * nodes into a new and unreachable block. */
1774 keep_alive(get_cur_block());
1781 static void statement_to_firm(statement_t *statement);
1782 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1784 static ir_node *expression_to_addr(const expression_t *expression);
1785 static ir_node *create_condition_evaluation(const expression_t *expression,
1786 ir_node *true_block,
1787 ir_node *false_block);
1789 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1792 if (!is_type_compound(type)) {
1793 ir_mode *mode = get_ir_mode_storage(type);
1794 value = create_conv(dbgi, value, mode);
1795 value = do_strict_conv(dbgi, value);
1798 ir_node *memory = get_store();
1800 if (is_type_scalar(type)) {
1801 ir_node *store = new_d_Store(dbgi, memory, addr, value);
1802 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1803 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE && !is_Bad(store))
1804 set_Store_volatility(store, volatility_is_volatile);
1805 set_store(store_mem);
1807 ir_type *irtype = get_ir_type(type);
1808 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1809 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1810 set_store(copyb_mem);
1814 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1816 tarval *all_one = get_mode_all_one(mode);
1817 int mode_size = get_mode_size_bits(mode);
1819 assert(offset >= 0);
1821 assert(offset + size <= mode_size);
1822 if (size == mode_size) {
1826 long shiftr = get_mode_size_bits(mode) - size;
1827 long shiftl = offset;
1828 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1829 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1830 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1831 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1836 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1837 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1839 ir_type *entity_type = get_entity_type(entity);
1840 ir_type *base_type = get_primitive_base_type(entity_type);
1841 assert(base_type != NULL);
1842 ir_mode *mode = get_type_mode(base_type);
1844 value = create_conv(dbgi, value, mode);
1846 /* kill upper bits of value and shift to right position */
1847 int bitoffset = get_entity_offset_bits_remainder(entity);
1848 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1850 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1851 ir_node *mask_node = new_d_Const(dbgi, mask);
1852 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1853 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1854 ir_node *shiftcount = new_d_Const(dbgi, shiftl);
1855 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1857 /* load current value */
1858 ir_node *mem = get_store();
1859 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1860 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1861 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1862 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1863 tarval *inv_mask = tarval_not(shift_mask);
1864 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1865 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1867 /* construct new value and store */
1868 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1869 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val);
1870 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1871 set_store(store_mem);
1875 set_Load_volatility(load, volatility_is_volatile);
1877 set_Store_volatility(store, volatility_is_volatile);
1880 return value_masked;
1883 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1886 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1887 type_t *type = expression->base.type;
1888 ir_mode *mode = get_ir_mode_storage(type);
1889 ir_node *mem = get_store();
1890 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1891 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1892 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1894 load_res = create_conv(dbgi, load_res, mode_int);
1896 set_store(load_mem);
1898 /* kill upper bits */
1899 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1900 ir_entity *entity = expression->compound_entry->compound_member.entity;
1901 int bitoffset = get_entity_offset_bits_remainder(entity);
1902 ir_type *entity_type = get_entity_type(entity);
1903 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1904 long shift_bitsl = machine_size - bitoffset - bitsize;
1905 assert(shift_bitsl >= 0);
1906 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1907 ir_node *countl = new_d_Const(dbgi, tvl);
1908 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1910 long shift_bitsr = bitoffset + shift_bitsl;
1911 assert(shift_bitsr <= (long) machine_size);
1912 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1913 ir_node *countr = new_d_Const(dbgi, tvr);
1915 if (mode_is_signed(mode)) {
1916 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1918 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1921 return create_conv(dbgi, shiftr, mode);
1924 /* make sure the selected compound type is constructed */
1925 static void construct_select_compound(const select_expression_t *expression)
1927 type_t *type = skip_typeref(expression->compound->base.type);
1928 if (is_type_pointer(type)) {
1929 type = type->pointer.points_to;
1931 (void) get_ir_type(type);
1934 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1935 ir_node *value, ir_node *addr)
1937 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1938 type_t *type = skip_typeref(expression->base.type);
1940 if (!is_type_compound(type)) {
1941 ir_mode *mode = get_ir_mode_storage(type);
1942 value = create_conv(dbgi, value, mode);
1943 value = do_strict_conv(dbgi, value);
1946 if (expression->kind == EXPR_REFERENCE) {
1947 const reference_expression_t *ref = &expression->reference;
1949 entity_t *entity = ref->entity;
1950 assert(is_declaration(entity));
1951 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1952 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1953 set_value(entity->variable.v.value_number, value);
1955 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1956 set_value(entity->parameter.v.value_number, value);
1962 addr = expression_to_addr(expression);
1963 assert(addr != NULL);
1965 if (expression->kind == EXPR_SELECT) {
1966 const select_expression_t *select = &expression->select;
1968 construct_select_compound(select);
1970 entity_t *entity = select->compound_entry;
1971 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1972 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1973 ir_entity *irentity = entity->compound_member.entity;
1975 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1976 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
1982 assign_value(dbgi, addr, type, value);
1986 static void set_value_for_expression(const expression_t *expression,
1989 set_value_for_expression_addr(expression, value, NULL);
1992 static ir_node *get_value_from_lvalue(const expression_t *expression,
1995 if (expression->kind == EXPR_REFERENCE) {
1996 const reference_expression_t *ref = &expression->reference;
1998 entity_t *entity = ref->entity;
1999 assert(entity->kind == ENTITY_VARIABLE
2000 || entity->kind == ENTITY_PARAMETER);
2001 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2003 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2004 value_number = entity->variable.v.value_number;
2005 assert(addr == NULL);
2006 type_t *type = skip_typeref(expression->base.type);
2007 ir_mode *mode = get_ir_mode_storage(type);
2008 ir_node *res = get_value(value_number, mode);
2009 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2010 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2011 value_number = entity->parameter.v.value_number;
2012 assert(addr == NULL);
2013 type_t *type = skip_typeref(expression->base.type);
2014 ir_mode *mode = get_ir_mode_storage(type);
2015 ir_node *res = get_value(value_number, mode);
2016 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2020 assert(addr != NULL);
2021 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2024 if (expression->kind == EXPR_SELECT &&
2025 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2026 construct_select_compound(&expression->select);
2027 value = bitfield_extract_to_firm(&expression->select, addr);
2029 value = deref_address(dbgi, expression->base.type, addr);
2036 static ir_node *create_incdec(const unary_expression_t *expression)
2038 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2039 const expression_t *value_expr = expression->value;
2040 ir_node *addr = expression_to_addr(value_expr);
2041 ir_node *value = get_value_from_lvalue(value_expr, addr);
2043 type_t *type = skip_typeref(expression->base.type);
2044 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2047 if (is_type_pointer(type)) {
2048 pointer_type_t *pointer_type = &type->pointer;
2049 offset = get_type_size(pointer_type->points_to);
2051 assert(is_type_arithmetic(type));
2052 offset = new_Const(get_mode_one(mode));
2056 ir_node *store_value;
2057 switch(expression->base.kind) {
2058 case EXPR_UNARY_POSTFIX_INCREMENT:
2060 store_value = new_d_Add(dbgi, value, offset, mode);
2062 case EXPR_UNARY_POSTFIX_DECREMENT:
2064 store_value = new_d_Sub(dbgi, value, offset, mode);
2066 case EXPR_UNARY_PREFIX_INCREMENT:
2067 result = new_d_Add(dbgi, value, offset, mode);
2068 store_value = result;
2070 case EXPR_UNARY_PREFIX_DECREMENT:
2071 result = new_d_Sub(dbgi, value, offset, mode);
2072 store_value = result;
2075 panic("no incdec expr in create_incdec");
2078 set_value_for_expression_addr(value_expr, store_value, addr);
2083 static bool is_local_variable(expression_t *expression)
2085 if (expression->kind != EXPR_REFERENCE)
2087 reference_expression_t *ref_expr = &expression->reference;
2088 entity_t *entity = ref_expr->entity;
2089 if (entity->kind != ENTITY_VARIABLE)
2091 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2092 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2095 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2098 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2099 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2100 case EXPR_BINARY_NOTEQUAL:
2101 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2102 case EXPR_BINARY_ISLESS:
2103 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2104 case EXPR_BINARY_ISLESSEQUAL:
2105 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2106 case EXPR_BINARY_ISGREATER:
2107 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2108 case EXPR_BINARY_ISGREATEREQUAL:
2109 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2110 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2115 panic("trying to get pn_Cmp from non-comparison binexpr type");
2119 * Handle the assume optimizer hint: check if a Confirm
2120 * node can be created.
2122 * @param dbi debug info
2123 * @param expr the IL assume expression
2125 * we support here only some simple cases:
2130 static ir_node *handle_assume_compare(dbg_info *dbi,
2131 const binary_expression_t *expression)
2133 expression_t *op1 = expression->left;
2134 expression_t *op2 = expression->right;
2135 entity_t *var2, *var = NULL;
2136 ir_node *res = NULL;
2139 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2141 if (is_local_variable(op1) && is_local_variable(op2)) {
2142 var = op1->reference.entity;
2143 var2 = op2->reference.entity;
2145 type_t *const type = skip_typeref(var->declaration.type);
2146 ir_mode *const mode = get_ir_mode_storage(type);
2148 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2149 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2151 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2152 set_value(var2->variable.v.value_number, res);
2154 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2155 set_value(var->variable.v.value_number, res);
2161 if (is_local_variable(op1) && is_constant_expression(op2)) {
2162 var = op1->reference.entity;
2164 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2165 cmp_val = get_inversed_pnc(cmp_val);
2166 var = op2->reference.entity;
2171 type_t *const type = skip_typeref(var->declaration.type);
2172 ir_mode *const mode = get_ir_mode_storage(type);
2174 res = get_value(var->variable.v.value_number, mode);
2175 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2176 set_value(var->variable.v.value_number, res);
2182 * Handle the assume optimizer hint.
2184 * @param dbi debug info
2185 * @param expr the IL assume expression
2187 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2188 switch(expression->kind) {
2189 case EXPR_BINARY_EQUAL:
2190 case EXPR_BINARY_NOTEQUAL:
2191 case EXPR_BINARY_LESS:
2192 case EXPR_BINARY_LESSEQUAL:
2193 case EXPR_BINARY_GREATER:
2194 case EXPR_BINARY_GREATEREQUAL:
2195 return handle_assume_compare(dbi, &expression->binary);
2201 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2203 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2204 type_t *type = skip_typeref(expression->base.type);
2206 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2207 return expression_to_addr(expression->value);
2209 const expression_t *value = expression->value;
2211 switch(expression->base.kind) {
2212 case EXPR_UNARY_NEGATE: {
2213 ir_node *value_node = expression_to_firm(value);
2214 ir_mode *mode = get_ir_mode_arithmetic(type);
2215 return new_d_Minus(dbgi, value_node, mode);
2217 case EXPR_UNARY_PLUS:
2218 return expression_to_firm(value);
2219 case EXPR_UNARY_BITWISE_NEGATE: {
2220 ir_node *value_node = expression_to_firm(value);
2221 ir_mode *mode = get_ir_mode_arithmetic(type);
2222 return new_d_Not(dbgi, value_node, mode);
2224 case EXPR_UNARY_NOT: {
2225 ir_node *value_node = _expression_to_firm(value);
2226 value_node = create_conv(dbgi, value_node, mode_b);
2227 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2230 case EXPR_UNARY_DEREFERENCE: {
2231 ir_node *value_node = expression_to_firm(value);
2232 type_t *value_type = skip_typeref(value->base.type);
2233 assert(is_type_pointer(value_type));
2234 type_t *points_to = value_type->pointer.points_to;
2235 return deref_address(dbgi, points_to, value_node);
2237 case EXPR_UNARY_POSTFIX_INCREMENT:
2238 case EXPR_UNARY_POSTFIX_DECREMENT:
2239 case EXPR_UNARY_PREFIX_INCREMENT:
2240 case EXPR_UNARY_PREFIX_DECREMENT:
2241 return create_incdec(expression);
2242 case EXPR_UNARY_CAST: {
2243 ir_node *value_node = expression_to_firm(value);
2244 if (is_type_scalar(type)) {
2245 ir_mode *mode = get_ir_mode_storage(type);
2246 ir_node *node = create_conv(dbgi, value_node, mode);
2247 node = do_strict_conv(dbgi, node);
2249 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2250 node = create_conv(dbgi, node, mode_arith);
2253 /* make sure firm type is constructed */
2254 (void) get_ir_type(type);
2258 case EXPR_UNARY_CAST_IMPLICIT: {
2259 ir_node *value_node = expression_to_firm(value);
2260 if (is_type_scalar(type)) {
2261 ir_mode *mode = get_ir_mode_arithmetic(type);
2262 return create_conv(dbgi, value_node, mode);
2267 case EXPR_UNARY_ASSUME:
2268 if (firm_opt.confirm)
2269 return handle_assume(dbgi, value);
2276 panic("invalid UNEXPR type found");
2280 * produces a 0/1 depending of the value of a mode_b node
2282 static ir_node *produce_condition_result(const expression_t *expression,
2283 ir_mode *mode, dbg_info *dbgi)
2285 ir_node *cur_block = get_cur_block();
2287 ir_node *one_block = new_immBlock();
2288 set_cur_block(one_block);
2289 ir_node *one = new_Const(get_mode_one(mode));
2290 ir_node *jmp_one = new_d_Jmp(dbgi);
2292 ir_node *zero_block = new_immBlock();
2293 set_cur_block(zero_block);
2294 ir_node *zero = new_Const(get_mode_null(mode));
2295 ir_node *jmp_zero = new_d_Jmp(dbgi);
2297 set_cur_block(cur_block);
2298 create_condition_evaluation(expression, one_block, zero_block);
2299 mature_immBlock(one_block);
2300 mature_immBlock(zero_block);
2302 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2303 new_Block(2, in_cf);
2305 ir_node *in[2] = { one, zero };
2306 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2311 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2312 ir_node *value, type_t *type)
2314 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2315 assert(is_type_pointer(type));
2316 pointer_type_t *const pointer_type = &type->pointer;
2317 type_t *const points_to = skip_typeref(pointer_type->points_to);
2318 unsigned elem_size = get_type_size_const(points_to);
2320 value = create_conv(dbgi, value, mode);
2322 /* gcc extension: allow arithmetic with void * and function * */
2323 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2324 is_type_function(points_to)) {
2328 assert(elem_size >= 1);
2332 ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2333 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode);
2337 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2338 ir_node *left, ir_node *right)
2341 type_t *type_left = skip_typeref(expression->left->base.type);
2342 type_t *type_right = skip_typeref(expression->right->base.type);
2344 expression_kind_t kind = expression->base.kind;
2347 case EXPR_BINARY_SHIFTLEFT:
2348 case EXPR_BINARY_SHIFTRIGHT:
2349 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2350 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2351 mode = get_irn_mode(left);
2352 right = create_conv(dbgi, right, mode_uint);
2355 case EXPR_BINARY_SUB:
2356 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2357 const pointer_type_t *const ptr_type = &type_left->pointer;
2359 mode = get_ir_mode_arithmetic(expression->base.type);
2360 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2361 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2362 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2363 ir_node *const no_mem = new_NoMem();
2364 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2365 mode, op_pin_state_floats);
2366 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2369 case EXPR_BINARY_SUB_ASSIGN:
2370 if (is_type_pointer(type_left)) {
2371 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2372 mode = get_ir_mode_arithmetic(type_left);
2377 case EXPR_BINARY_ADD:
2378 case EXPR_BINARY_ADD_ASSIGN:
2379 if (is_type_pointer(type_left)) {
2380 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2381 mode = get_ir_mode_arithmetic(type_left);
2383 } else if (is_type_pointer(type_right)) {
2384 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2385 mode = get_ir_mode_arithmetic(type_right);
2392 mode = get_ir_mode_arithmetic(type_right);
2393 left = create_conv(dbgi, left, mode);
2398 case EXPR_BINARY_ADD_ASSIGN:
2399 case EXPR_BINARY_ADD:
2400 return new_d_Add(dbgi, left, right, mode);
2401 case EXPR_BINARY_SUB_ASSIGN:
2402 case EXPR_BINARY_SUB:
2403 return new_d_Sub(dbgi, left, right, mode);
2404 case EXPR_BINARY_MUL_ASSIGN:
2405 case EXPR_BINARY_MUL:
2406 return new_d_Mul(dbgi, left, right, mode);
2407 case EXPR_BINARY_BITWISE_AND:
2408 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2409 return new_d_And(dbgi, left, right, mode);
2410 case EXPR_BINARY_BITWISE_OR:
2411 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2412 return new_d_Or(dbgi, left, right, mode);
2413 case EXPR_BINARY_BITWISE_XOR:
2414 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2415 return new_d_Eor(dbgi, left, right, mode);
2416 case EXPR_BINARY_SHIFTLEFT:
2417 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2418 return new_d_Shl(dbgi, left, right, mode);
2419 case EXPR_BINARY_SHIFTRIGHT:
2420 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2421 if (mode_is_signed(mode)) {
2422 return new_d_Shrs(dbgi, left, right, mode);
2424 return new_d_Shr(dbgi, left, right, mode);
2426 case EXPR_BINARY_DIV:
2427 case EXPR_BINARY_DIV_ASSIGN: {
2428 ir_node *pin = new_Pin(new_NoMem());
2431 if (mode_is_float(mode)) {
2432 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2433 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2435 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2436 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2440 case EXPR_BINARY_MOD:
2441 case EXPR_BINARY_MOD_ASSIGN: {
2442 ir_node *pin = new_Pin(new_NoMem());
2443 assert(!mode_is_float(mode));
2444 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2445 op_pin_state_floats);
2446 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2450 panic("unexpected expression kind");
2454 static ir_node *create_lazy_op(const binary_expression_t *expression)
2456 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2457 type_t *type = skip_typeref(expression->base.type);
2458 ir_mode *mode = get_ir_mode_arithmetic(type);
2460 if (is_constant_expression(expression->left)) {
2461 long val = fold_constant(expression->left);
2462 expression_kind_t ekind = expression->base.kind;
2463 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2464 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2466 return new_Const(get_mode_null(mode));
2470 return new_Const(get_mode_one(mode));
2474 if (is_constant_expression(expression->right)) {
2475 long const valr = fold_constant(expression->right);
2477 new_Const(get_mode_one(mode)) :
2478 new_Const(get_mode_null(mode));
2481 return produce_condition_result(expression->right, mode, dbgi);
2484 return produce_condition_result((const expression_t*) expression, mode,
2488 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2489 ir_node *right, ir_mode *mode);
2491 static ir_node *create_assign_binop(const binary_expression_t *expression)
2493 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2494 const expression_t *left_expr = expression->left;
2495 type_t *type = skip_typeref(left_expr->base.type);
2496 ir_mode *left_mode = get_ir_mode_storage(type);
2497 ir_node *right = expression_to_firm(expression->right);
2498 ir_node *left_addr = expression_to_addr(left_expr);
2499 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2500 ir_node *result = create_op(dbgi, expression, left, right);
2502 result = create_conv(dbgi, result, left_mode);
2503 result = do_strict_conv(dbgi, result);
2505 result = set_value_for_expression_addr(left_expr, result, left_addr);
2507 if (!is_type_compound(type)) {
2508 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2509 result = create_conv(dbgi, result, mode_arithmetic);
2514 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2516 expression_kind_t kind = expression->base.kind;
2519 case EXPR_BINARY_EQUAL:
2520 case EXPR_BINARY_NOTEQUAL:
2521 case EXPR_BINARY_LESS:
2522 case EXPR_BINARY_LESSEQUAL:
2523 case EXPR_BINARY_GREATER:
2524 case EXPR_BINARY_GREATEREQUAL:
2525 case EXPR_BINARY_ISGREATER:
2526 case EXPR_BINARY_ISGREATEREQUAL:
2527 case EXPR_BINARY_ISLESS:
2528 case EXPR_BINARY_ISLESSEQUAL:
2529 case EXPR_BINARY_ISLESSGREATER:
2530 case EXPR_BINARY_ISUNORDERED: {
2531 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2532 ir_node *left = expression_to_firm(expression->left);
2533 ir_node *right = expression_to_firm(expression->right);
2534 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2535 long pnc = get_pnc(kind, expression->left->base.type);
2536 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2539 case EXPR_BINARY_ASSIGN: {
2540 ir_node *addr = expression_to_addr(expression->left);
2541 ir_node *right = expression_to_firm(expression->right);
2543 = set_value_for_expression_addr(expression->left, right, addr);
2545 type_t *type = skip_typeref(expression->base.type);
2546 if (!is_type_compound(type)) {
2547 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2548 res = create_conv(NULL, res, mode_arithmetic);
2552 case EXPR_BINARY_ADD:
2553 case EXPR_BINARY_SUB:
2554 case EXPR_BINARY_MUL:
2555 case EXPR_BINARY_DIV:
2556 case EXPR_BINARY_MOD:
2557 case EXPR_BINARY_BITWISE_AND:
2558 case EXPR_BINARY_BITWISE_OR:
2559 case EXPR_BINARY_BITWISE_XOR:
2560 case EXPR_BINARY_SHIFTLEFT:
2561 case EXPR_BINARY_SHIFTRIGHT:
2563 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2564 ir_node *left = expression_to_firm(expression->left);
2565 ir_node *right = expression_to_firm(expression->right);
2566 return create_op(dbgi, expression, left, right);
2568 case EXPR_BINARY_LOGICAL_AND:
2569 case EXPR_BINARY_LOGICAL_OR:
2570 return create_lazy_op(expression);
2571 case EXPR_BINARY_COMMA:
2572 /* create side effects of left side */
2573 (void) expression_to_firm(expression->left);
2574 return _expression_to_firm(expression->right);
2576 case EXPR_BINARY_ADD_ASSIGN:
2577 case EXPR_BINARY_SUB_ASSIGN:
2578 case EXPR_BINARY_MUL_ASSIGN:
2579 case EXPR_BINARY_MOD_ASSIGN:
2580 case EXPR_BINARY_DIV_ASSIGN:
2581 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2582 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2583 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2584 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2585 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2586 return create_assign_binop(expression);
2588 panic("TODO binexpr type");
2592 static ir_node *array_access_addr(const array_access_expression_t *expression)
2594 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2595 ir_node *base_addr = expression_to_firm(expression->array_ref);
2596 ir_node *offset = expression_to_firm(expression->index);
2597 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2598 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2599 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2604 static ir_node *array_access_to_firm(
2605 const array_access_expression_t *expression)
2607 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2608 ir_node *addr = array_access_addr(expression);
2609 type_t *type = revert_automatic_type_conversion(
2610 (const expression_t*) expression);
2611 type = skip_typeref(type);
2613 return deref_address(dbgi, type, addr);
2616 static long get_offsetof_offset(const offsetof_expression_t *expression)
2618 type_t *orig_type = expression->type;
2621 designator_t *designator = expression->designator;
2622 for ( ; designator != NULL; designator = designator->next) {
2623 type_t *type = skip_typeref(orig_type);
2624 /* be sure the type is constructed */
2625 (void) get_ir_type(type);
2627 if (designator->symbol != NULL) {
2628 assert(is_type_compound(type));
2629 symbol_t *symbol = designator->symbol;
2631 compound_t *compound = type->compound.compound;
2632 entity_t *iter = compound->members.entities;
2633 for ( ; iter != NULL; iter = iter->base.next) {
2634 if (iter->base.symbol == symbol) {
2638 assert(iter != NULL);
2640 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2641 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2642 offset += get_entity_offset(iter->compound_member.entity);
2644 orig_type = iter->declaration.type;
2646 expression_t *array_index = designator->array_index;
2647 assert(designator->array_index != NULL);
2648 assert(is_type_array(type));
2650 long index = fold_constant(array_index);
2651 ir_type *arr_type = get_ir_type(type);
2652 ir_type *elem_type = get_array_element_type(arr_type);
2653 long elem_size = get_type_size_bytes(elem_type);
2655 offset += index * elem_size;
2657 orig_type = type->array.element_type;
2664 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2666 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2667 long offset = get_offsetof_offset(expression);
2668 tarval *tv = new_tarval_from_long(offset, mode);
2669 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2671 return new_d_Const(dbgi, tv);
2674 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2675 ir_entity *entity, type_t *type);
2677 static ir_node *compound_literal_to_firm(
2678 const compound_literal_expression_t *expression)
2680 type_t *type = expression->type;
2682 /* create an entity on the stack */
2683 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2685 ident *const id = id_unique("CompLit.%u");
2686 ir_type *const irtype = get_ir_type(type);
2687 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2688 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2689 set_entity_ld_ident(entity, id);
2691 set_entity_variability(entity, variability_uninitialized);
2693 /* create initialisation code */
2694 initializer_t *initializer = expression->initializer;
2695 create_local_initializer(initializer, dbgi, entity, type);
2697 /* create a sel for the compound literal address */
2698 ir_node *frame = get_local_frame(entity);
2699 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2704 * Transform a sizeof expression into Firm code.
2706 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2708 type_t *type = expression->type;
2710 type = expression->tp_expression->base.type;
2711 assert(type != NULL);
2714 type = skip_typeref(type);
2715 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2716 if (is_type_array(type) && type->array.is_vla
2717 && expression->tp_expression != NULL) {
2718 expression_to_firm(expression->tp_expression);
2721 return get_type_size(type);
2725 * Transform an alignof expression into Firm code.
2727 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2729 type_t *type = expression->type;
2731 /* beware: if expression is a variable reference, return the
2732 alignment of the variable. */
2733 const expression_t *tp_expression = expression->tp_expression;
2734 const entity_t *entity = expression_is_variable(tp_expression);
2735 if (entity != NULL) {
2736 /* TODO: get the alignment of this variable. */
2739 type = tp_expression->base.type;
2740 assert(type != NULL);
2743 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2744 symconst_symbol sym;
2745 sym.type_p = get_ir_type(type);
2746 return new_SymConst(mode, sym, symconst_type_align);
2749 static void init_ir_types(void);
2751 long fold_constant(const expression_t *expression)
2753 assert(is_type_valid(skip_typeref(expression->base.type)));
2755 bool constant_folding_old = constant_folding;
2756 constant_folding = true;
2760 assert(is_constant_expression(expression));
2762 ir_graph *old_current_ir_graph = current_ir_graph;
2763 if (current_ir_graph == NULL) {
2764 current_ir_graph = get_const_code_irg();
2767 ir_node *cnst = expression_to_firm(expression);
2768 current_ir_graph = old_current_ir_graph;
2770 if (!is_Const(cnst)) {
2771 panic("couldn't fold constant");
2774 tarval *tv = get_Const_tarval(cnst);
2775 if (!tarval_is_long(tv)) {
2776 panic("result of constant folding is not integer");
2779 constant_folding = constant_folding_old;
2781 return get_tarval_long(tv);
2784 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2786 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2788 /* first try to fold a constant condition */
2789 if (is_constant_expression(expression->condition)) {
2790 long val = fold_constant(expression->condition);
2792 expression_t *true_expression = expression->true_expression;
2793 if (true_expression == NULL)
2794 true_expression = expression->condition;
2795 return expression_to_firm(true_expression);
2797 return expression_to_firm(expression->false_expression);
2801 ir_node *cur_block = get_cur_block();
2803 /* create the true block */
2804 ir_node *true_block = new_immBlock();
2805 set_cur_block(true_block);
2807 ir_node *true_val = expression->true_expression != NULL ?
2808 expression_to_firm(expression->true_expression) : NULL;
2809 ir_node *true_jmp = new_Jmp();
2811 /* create the false block */
2812 ir_node *false_block = new_immBlock();
2813 set_cur_block(false_block);
2815 ir_node *false_val = expression_to_firm(expression->false_expression);
2816 ir_node *false_jmp = new_Jmp();
2818 /* create the condition evaluation */
2819 set_cur_block(cur_block);
2820 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2821 if (expression->true_expression == NULL) {
2822 if (cond_expr != NULL) {
2823 true_val = cond_expr;
2825 /* Condition ended with a short circuit (&&, ||, !) operation.
2826 * Generate a "1" as value for the true branch. */
2827 true_val = new_Const(get_mode_one(mode_Is));
2830 mature_immBlock(true_block);
2831 mature_immBlock(false_block);
2833 /* create the common block */
2834 ir_node *in_cf[2] = { true_jmp, false_jmp };
2835 new_Block(2, in_cf);
2837 /* TODO improve static semantics, so either both or no values are NULL */
2838 if (true_val == NULL || false_val == NULL)
2841 ir_node *in[2] = { true_val, false_val };
2842 ir_mode *mode = get_irn_mode(true_val);
2843 assert(get_irn_mode(false_val) == mode);
2844 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2850 * Returns an IR-node representing the address of a field.
2852 static ir_node *select_addr(const select_expression_t *expression)
2854 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2856 construct_select_compound(expression);
2858 ir_node *compound_addr = expression_to_firm(expression->compound);
2860 entity_t *entry = expression->compound_entry;
2861 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2862 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2864 if (constant_folding) {
2865 ir_mode *mode = get_irn_mode(compound_addr);
2866 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2867 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2868 return new_d_Add(dbgi, compound_addr, ofs, mode);
2870 ir_entity *irentity = entry->compound_member.entity;
2871 assert(irentity != NULL);
2872 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2876 static ir_node *select_to_firm(const select_expression_t *expression)
2878 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2879 ir_node *addr = select_addr(expression);
2880 type_t *type = revert_automatic_type_conversion(
2881 (const expression_t*) expression);
2882 type = skip_typeref(type);
2884 entity_t *entry = expression->compound_entry;
2885 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2886 type_t *entry_type = skip_typeref(entry->declaration.type);
2888 if (entry_type->kind == TYPE_BITFIELD) {
2889 return bitfield_extract_to_firm(expression, addr);
2892 return deref_address(dbgi, type, addr);
2895 /* Values returned by __builtin_classify_type. */
2896 typedef enum gcc_type_class
2902 enumeral_type_class,
2905 reference_type_class,
2909 function_type_class,
2920 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2922 type_t *type = expr->type_expression->base.type;
2924 /* FIXME gcc returns different values depending on whether compiling C or C++
2925 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2928 type = skip_typeref(type);
2929 switch (type->kind) {
2931 const atomic_type_t *const atomic_type = &type->atomic;
2932 switch (atomic_type->akind) {
2933 /* should not be reached */
2934 case ATOMIC_TYPE_INVALID:
2938 /* gcc cannot do that */
2939 case ATOMIC_TYPE_VOID:
2940 tc = void_type_class;
2943 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2944 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2945 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2946 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2947 case ATOMIC_TYPE_SHORT:
2948 case ATOMIC_TYPE_USHORT:
2949 case ATOMIC_TYPE_INT:
2950 case ATOMIC_TYPE_UINT:
2951 case ATOMIC_TYPE_LONG:
2952 case ATOMIC_TYPE_ULONG:
2953 case ATOMIC_TYPE_LONGLONG:
2954 case ATOMIC_TYPE_ULONGLONG:
2955 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2956 tc = integer_type_class;
2959 case ATOMIC_TYPE_FLOAT:
2960 case ATOMIC_TYPE_DOUBLE:
2961 case ATOMIC_TYPE_LONG_DOUBLE:
2962 tc = real_type_class;
2965 panic("Unexpected atomic type in classify_type_to_firm().");
2968 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
2969 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
2970 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
2971 case TYPE_ARRAY: /* gcc handles this as pointer */
2972 case TYPE_FUNCTION: /* gcc handles this as pointer */
2973 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
2974 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
2975 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
2977 /* gcc handles this as integer */
2978 case TYPE_ENUM: tc = integer_type_class; goto make_const;
2980 /* gcc classifies the referenced type */
2981 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
2984 /* typedef/typeof should be skipped already */
2991 panic("unexpected TYPE classify_type_to_firm().");
2995 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2996 tarval *const tv = new_tarval_from_long(tc, mode_int);
2997 return new_d_Const(dbgi, tv);
3000 static ir_node *function_name_to_firm(
3001 const funcname_expression_t *const expr)
3003 switch(expr->kind) {
3004 case FUNCNAME_FUNCTION:
3005 case FUNCNAME_PRETTY_FUNCTION:
3006 case FUNCNAME_FUNCDNAME:
3007 if (current_function_name == NULL) {
3008 const source_position_t *const src_pos = &expr->base.source_position;
3009 const char *name = current_function_entity->base.symbol->string;
3010 const string_t string = { name, strlen(name) + 1 };
3011 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3013 return current_function_name;
3014 case FUNCNAME_FUNCSIG:
3015 if (current_funcsig == NULL) {
3016 const source_position_t *const src_pos = &expr->base.source_position;
3017 ir_entity *ent = get_irg_entity(current_ir_graph);
3018 const char *const name = get_entity_ld_name(ent);
3019 const string_t string = { name, strlen(name) + 1 };
3020 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3022 return current_funcsig;
3024 panic("Unsupported function name");
3027 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3029 statement_t *statement = expr->statement;
3031 assert(statement->kind == STATEMENT_COMPOUND);
3032 return compound_statement_to_firm(&statement->compound);
3035 static ir_node *va_start_expression_to_firm(
3036 const va_start_expression_t *const expr)
3038 type_t *const type = current_function_entity->declaration.type;
3039 ir_type *const method_type = get_ir_type(type);
3040 int const n = get_method_n_params(method_type) - 1;
3041 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
3042 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
3043 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3044 ir_node *const no_mem = new_NoMem();
3045 ir_node *const arg_sel =
3046 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3048 ir_node *const cnst = get_type_size(expr->parameter->base.type);
3049 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3050 set_value_for_expression(expr->ap, add);
3055 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3057 type_t *const type = expr->base.type;
3058 expression_t *const ap_expr = expr->ap;
3059 ir_node *const ap_addr = expression_to_addr(ap_expr);
3060 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3061 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3062 ir_node *const res = deref_address(dbgi, type, ap);
3064 ir_node *const cnst = get_type_size(expr->base.type);
3065 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
3067 set_value_for_expression_addr(ap_expr, add, ap_addr);
3072 static ir_node *dereference_addr(const unary_expression_t *const expression)
3074 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3075 return expression_to_firm(expression->value);
3079 * Returns a IR-node representing an lvalue of the given expression.
3081 static ir_node *expression_to_addr(const expression_t *expression)
3083 switch(expression->kind) {
3084 case EXPR_ARRAY_ACCESS:
3085 return array_access_addr(&expression->array_access);
3087 return call_expression_to_firm(&expression->call);
3088 case EXPR_COMPOUND_LITERAL:
3089 return compound_literal_to_firm(&expression->compound_literal);
3090 case EXPR_REFERENCE:
3091 return reference_addr(&expression->reference);
3093 return select_addr(&expression->select);
3094 case EXPR_UNARY_DEREFERENCE:
3095 return dereference_addr(&expression->unary);
3099 panic("trying to get address of non-lvalue");
3102 static ir_node *builtin_constant_to_firm(
3103 const builtin_constant_expression_t *expression)
3105 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3108 if (is_constant_expression(expression->value)) {
3113 return new_Const_long(mode, v);
3116 static ir_node *builtin_prefetch_to_firm(
3117 const builtin_prefetch_expression_t *expression)
3119 ir_node *adr = expression_to_firm(expression->adr);
3120 /* no Firm support for prefetch yet */
3125 static ir_node *get_label_block(label_t *label)
3127 if (label->block != NULL)
3128 return label->block;
3130 /* beware: might be called from create initializer with current_ir_graph
3131 * set to const_code_irg. */
3132 ir_graph *rem = current_ir_graph;
3133 current_ir_graph = current_function;
3135 ir_node *block = new_immBlock();
3137 label->block = block;
3139 ARR_APP1(label_t *, all_labels, label);
3141 current_ir_graph = rem;
3146 * Pointer to a label. This is used for the
3147 * GNU address-of-label extension.
3149 static ir_node *label_address_to_firm(
3150 const label_address_expression_t *label)
3152 ir_node *block = get_label_block(label->label);
3153 ir_label_t nr = get_Block_label(block);
3156 nr = get_irp_next_label_nr();
3157 set_Block_label(block, nr);
3159 symconst_symbol value;
3161 return new_SymConst(mode_P_code, value, symconst_label);
3164 static ir_node *builtin_symbol_to_firm(
3165 const builtin_symbol_expression_t *expression)
3167 /* for gcc compatibility we have to produce (dummy) addresses for some
3169 if (warning.other) {
3170 warningf(&expression->base.source_position,
3171 "taking address of builtin '%Y'", expression->symbol);
3174 /* simply create a NULL pointer */
3175 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
3176 ir_node *res = new_Const_long(mode, 0);
3182 * creates firm nodes for an expression. The difference between this function
3183 * and expression_to_firm is, that this version might produce mode_b nodes
3184 * instead of mode_Is.
3186 static ir_node *_expression_to_firm(const expression_t *expression)
3189 if (!constant_folding) {
3190 assert(!expression->base.transformed);
3191 ((expression_t*) expression)->base.transformed = true;
3195 switch (expression->kind) {
3196 case EXPR_CHARACTER_CONSTANT:
3197 return character_constant_to_firm(&expression->conste);
3198 case EXPR_WIDE_CHARACTER_CONSTANT:
3199 return wide_character_constant_to_firm(&expression->conste);
3201 return const_to_firm(&expression->conste);
3202 case EXPR_STRING_LITERAL:
3203 return string_literal_to_firm(&expression->string);
3204 case EXPR_WIDE_STRING_LITERAL:
3205 return wide_string_literal_to_firm(&expression->wide_string);
3206 case EXPR_REFERENCE:
3207 return reference_expression_to_firm(&expression->reference);
3208 case EXPR_REFERENCE_ENUM_VALUE:
3209 return reference_expression_enum_value_to_firm(&expression->reference);
3211 return call_expression_to_firm(&expression->call);
3213 return unary_expression_to_firm(&expression->unary);
3215 return binary_expression_to_firm(&expression->binary);
3216 case EXPR_ARRAY_ACCESS:
3217 return array_access_to_firm(&expression->array_access);
3219 return sizeof_to_firm(&expression->typeprop);
3221 return alignof_to_firm(&expression->typeprop);
3222 case EXPR_CONDITIONAL:
3223 return conditional_to_firm(&expression->conditional);
3225 return select_to_firm(&expression->select);
3226 case EXPR_CLASSIFY_TYPE:
3227 return classify_type_to_firm(&expression->classify_type);
3229 return function_name_to_firm(&expression->funcname);
3230 case EXPR_STATEMENT:
3231 return statement_expression_to_firm(&expression->statement);
3233 return va_start_expression_to_firm(&expression->va_starte);
3235 return va_arg_expression_to_firm(&expression->va_arge);
3236 case EXPR_BUILTIN_SYMBOL:
3237 return builtin_symbol_to_firm(&expression->builtin_symbol);
3238 case EXPR_BUILTIN_CONSTANT_P:
3239 return builtin_constant_to_firm(&expression->builtin_constant);
3240 case EXPR_BUILTIN_PREFETCH:
3241 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3243 return offsetof_to_firm(&expression->offsetofe);
3244 case EXPR_COMPOUND_LITERAL:
3245 return compound_literal_to_firm(&expression->compound_literal);
3246 case EXPR_LABEL_ADDRESS:
3247 return label_address_to_firm(&expression->label_address);
3253 panic("invalid expression found");
3256 static bool is_builtin_expect(const expression_t *expression)
3258 if (expression->kind != EXPR_CALL)
3261 expression_t *function = expression->call.function;
3262 if (function->kind != EXPR_BUILTIN_SYMBOL)
3264 if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3270 static bool produces_mode_b(const expression_t *expression)
3272 switch (expression->kind) {
3273 case EXPR_BINARY_EQUAL:
3274 case EXPR_BINARY_NOTEQUAL:
3275 case EXPR_BINARY_LESS:
3276 case EXPR_BINARY_LESSEQUAL:
3277 case EXPR_BINARY_GREATER:
3278 case EXPR_BINARY_GREATEREQUAL:
3279 case EXPR_BINARY_ISGREATER:
3280 case EXPR_BINARY_ISGREATEREQUAL:
3281 case EXPR_BINARY_ISLESS:
3282 case EXPR_BINARY_ISLESSEQUAL:
3283 case EXPR_BINARY_ISLESSGREATER:
3284 case EXPR_BINARY_ISUNORDERED:
3285 case EXPR_UNARY_NOT:
3289 if (is_builtin_expect(expression)) {
3290 expression_t *argument = expression->call.arguments->expression;
3291 return produces_mode_b(argument);
3294 case EXPR_BINARY_COMMA:
3295 return produces_mode_b(expression->binary.right);
3302 static ir_node *expression_to_firm(const expression_t *expression)
3304 if (!produces_mode_b(expression)) {
3305 ir_node *res = _expression_to_firm(expression);
3306 assert(res == NULL || get_irn_mode(res) != mode_b);
3310 if (is_constant_expression(expression)) {
3311 ir_node *res = _expression_to_firm(expression);
3312 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3313 assert(is_Const(res));
3314 if (is_Const_null(res)) {
3315 return new_Const_long(mode, 0);
3317 return new_Const_long(mode, 1);
3321 /* we have to produce a 0/1 from the mode_b expression */
3322 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3323 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3324 return produce_condition_result(expression, mode, dbgi);
3328 * create a short-circuit expression evaluation that tries to construct
3329 * efficient control flow structures for &&, || and ! expressions
3331 static ir_node *create_condition_evaluation(const expression_t *expression,
3332 ir_node *true_block,
3333 ir_node *false_block)
3335 switch(expression->kind) {
3336 case EXPR_UNARY_NOT: {
3337 const unary_expression_t *unary_expression = &expression->unary;
3338 create_condition_evaluation(unary_expression->value, false_block,
3342 case EXPR_BINARY_LOGICAL_AND: {
3343 const binary_expression_t *binary_expression = &expression->binary;
3345 ir_node *extra_block = new_immBlock();
3346 create_condition_evaluation(binary_expression->left, extra_block,
3348 mature_immBlock(extra_block);
3349 set_cur_block(extra_block);
3350 create_condition_evaluation(binary_expression->right, true_block,
3354 case EXPR_BINARY_LOGICAL_OR: {
3355 const binary_expression_t *binary_expression = &expression->binary;
3357 ir_node *extra_block = new_immBlock();
3358 create_condition_evaluation(binary_expression->left, true_block,
3360 mature_immBlock(extra_block);
3361 set_cur_block(extra_block);
3362 create_condition_evaluation(binary_expression->right, true_block,
3370 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3371 ir_node *cond_expr = _expression_to_firm(expression);
3372 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3373 ir_node *cond = new_d_Cond(dbgi, condition);
3374 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3375 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3377 /* set branch prediction info based on __builtin_expect */
3378 if (is_builtin_expect(expression)) {
3379 call_argument_t *argument = expression->call.arguments->next;
3380 if (is_constant_expression(argument->expression)) {
3381 long cnst = fold_constant(argument->expression);
3382 cond_jmp_predicate pred;
3385 pred = COND_JMP_PRED_FALSE;
3387 pred = COND_JMP_PRED_TRUE;
3389 set_Cond_jmp_pred(cond, pred);
3393 add_immBlock_pred(true_block, true_proj);
3394 add_immBlock_pred(false_block, false_proj);
3396 set_cur_block(NULL);
3401 static void create_variable_entity(entity_t *variable,
3402 declaration_kind_t declaration_kind,
3403 ir_type *parent_type)
3405 assert(variable->kind == ENTITY_VARIABLE);
3406 type_t *const type = skip_typeref(variable->declaration.type);
3407 ident *const id = new_id_from_str(variable->base.symbol->string);
3408 ir_type *const irtype = get_ir_type(type);
3409 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3410 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3412 handle_gnu_attributes_ent(irentity, variable);
3414 variable->declaration.kind = (unsigned char) declaration_kind;
3415 variable->variable.v.entity = irentity;
3416 set_entity_variability(irentity, variability_uninitialized);
3417 set_entity_ld_ident(irentity, create_ld_ident(variable));
3418 if (parent_type == get_tls_type())
3419 set_entity_allocation(irentity, allocation_automatic);
3420 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3421 set_entity_allocation(irentity, allocation_static);
3423 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3424 set_entity_volatility(irentity, volatility_is_volatile);
3429 typedef struct type_path_entry_t type_path_entry_t;
3430 struct type_path_entry_t {
3432 ir_initializer_t *initializer;
3434 entity_t *compound_entry;
3437 typedef struct type_path_t type_path_t;
3438 struct type_path_t {
3439 type_path_entry_t *path;
3444 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3446 size_t len = ARR_LEN(path->path);
3448 for (size_t i = 0; i < len; ++i) {
3449 const type_path_entry_t *entry = & path->path[i];
3451 type_t *type = skip_typeref(entry->type);
3452 if (is_type_compound(type)) {
3453 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3454 } else if (is_type_array(type)) {
3455 fprintf(stderr, "[%u]", (unsigned) entry->index);
3457 fprintf(stderr, "-INVALID-");
3460 fprintf(stderr, " (");
3461 print_type(path->top_type);
3462 fprintf(stderr, ")");
3465 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3467 size_t len = ARR_LEN(path->path);
3469 return & path->path[len-1];
3472 static type_path_entry_t *append_to_type_path(type_path_t *path)
3474 size_t len = ARR_LEN(path->path);
3475 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3477 type_path_entry_t *result = & path->path[len];
3478 memset(result, 0, sizeof(result[0]));
3482 static size_t get_compound_member_count(const compound_type_t *type)
3484 compound_t *compound = type->compound;
3485 size_t n_members = 0;
3486 entity_t *member = compound->members.entities;
3487 for ( ; member != NULL; member = member->base.next) {
3494 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3496 type_t *orig_top_type = path->top_type;
3497 type_t *top_type = skip_typeref(orig_top_type);
3499 assert(is_type_compound(top_type) || is_type_array(top_type));
3501 if (ARR_LEN(path->path) == 0) {
3504 type_path_entry_t *top = get_type_path_top(path);
3505 ir_initializer_t *initializer = top->initializer;
3506 return get_initializer_compound_value(initializer, top->index);
3510 static void descend_into_subtype(type_path_t *path)
3512 type_t *orig_top_type = path->top_type;
3513 type_t *top_type = skip_typeref(orig_top_type);
3515 assert(is_type_compound(top_type) || is_type_array(top_type));
3517 ir_initializer_t *initializer = get_initializer_entry(path);
3519 type_path_entry_t *top = append_to_type_path(path);
3520 top->type = top_type;
3524 if (is_type_compound(top_type)) {
3525 compound_t *compound = top_type->compound.compound;
3526 entity_t *entry = compound->members.entities;
3528 top->compound_entry = entry;
3530 len = get_compound_member_count(&top_type->compound);
3531 if (entry != NULL) {
3532 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3533 path->top_type = entry->declaration.type;
3536 assert(is_type_array(top_type));
3537 assert(top_type->array.size > 0);
3540 path->top_type = top_type->array.element_type;
3541 len = top_type->array.size;
3543 if (initializer == NULL
3544 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3545 initializer = create_initializer_compound(len);
3546 /* we have to set the entry at the 2nd latest path entry... */
3547 size_t path_len = ARR_LEN(path->path);
3548 assert(path_len >= 1);
3550 type_path_entry_t *entry = & path->path[path_len-2];
3551 ir_initializer_t *tinitializer = entry->initializer;
3552 set_initializer_compound_value(tinitializer, entry->index,
3556 top->initializer = initializer;
3559 static void ascend_from_subtype(type_path_t *path)
3561 type_path_entry_t *top = get_type_path_top(path);
3563 path->top_type = top->type;
3565 size_t len = ARR_LEN(path->path);
3566 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3569 static void walk_designator(type_path_t *path, const designator_t *designator)
3571 /* designators start at current object type */
3572 ARR_RESIZE(type_path_entry_t, path->path, 1);
3574 for ( ; designator != NULL; designator = designator->next) {
3575 type_path_entry_t *top = get_type_path_top(path);
3576 type_t *orig_type = top->type;
3577 type_t *type = skip_typeref(orig_type);
3579 if (designator->symbol != NULL) {
3580 assert(is_type_compound(type));
3582 symbol_t *symbol = designator->symbol;
3584 compound_t *compound = type->compound.compound;
3585 entity_t *iter = compound->members.entities;
3586 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3587 if (iter->base.symbol == symbol) {
3588 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3592 assert(iter != NULL);
3594 top->type = orig_type;
3595 top->compound_entry = iter;
3597 orig_type = iter->declaration.type;
3599 expression_t *array_index = designator->array_index;
3600 assert(designator->array_index != NULL);
3601 assert(is_type_array(type));
3603 long index = fold_constant(array_index);
3606 if (type->array.size_constant) {
3607 long array_size = type->array.size;
3608 assert(index < array_size);
3612 top->type = orig_type;
3613 top->index = (size_t) index;
3614 orig_type = type->array.element_type;
3616 path->top_type = orig_type;
3618 if (designator->next != NULL) {
3619 descend_into_subtype(path);
3623 path->invalid = false;
3626 static void advance_current_object(type_path_t *path)
3628 if (path->invalid) {
3629 /* TODO: handle this... */
3630 panic("invalid initializer in ast2firm (excessive elements)");
3633 type_path_entry_t *top = get_type_path_top(path);
3635 type_t *type = skip_typeref(top->type);
3636 if (is_type_union(type)) {
3637 top->compound_entry = NULL;
3638 } else if (is_type_struct(type)) {
3639 entity_t *entry = top->compound_entry;
3642 entry = entry->base.next;
3643 top->compound_entry = entry;
3644 if (entry != NULL) {
3645 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3646 path->top_type = entry->declaration.type;
3650 assert(is_type_array(type));
3653 if (!type->array.size_constant || top->index < type->array.size) {
3658 /* we're past the last member of the current sub-aggregate, try if we
3659 * can ascend in the type hierarchy and continue with another subobject */
3660 size_t len = ARR_LEN(path->path);
3663 ascend_from_subtype(path);
3664 advance_current_object(path);
3666 path->invalid = true;
3671 static ir_initializer_t *create_ir_initializer(
3672 const initializer_t *initializer, type_t *type);
3674 static ir_initializer_t *create_ir_initializer_value(
3675 const initializer_value_t *initializer)
3677 if (is_type_compound(initializer->value->base.type)) {
3678 panic("initializer creation for compounds not implemented yet");
3680 ir_node *value = expression_to_firm(initializer->value);
3681 type_t *type = initializer->value->base.type;
3682 ir_mode *mode = get_ir_mode_storage(type);
3683 value = create_conv(NULL, value, mode);
3684 return create_initializer_const(value);
3687 /** test wether type can be initialized by a string constant */
3688 static bool is_string_type(type_t *type)
3691 if (is_type_pointer(type)) {
3692 inner = skip_typeref(type->pointer.points_to);
3693 } else if(is_type_array(type)) {
3694 inner = skip_typeref(type->array.element_type);
3699 return is_type_integer(inner);
3702 static ir_initializer_t *create_ir_initializer_list(
3703 const initializer_list_t *initializer, type_t *type)
3706 memset(&path, 0, sizeof(path));
3707 path.top_type = type;
3708 path.path = NEW_ARR_F(type_path_entry_t, 0);
3710 descend_into_subtype(&path);
3712 for (size_t i = 0; i < initializer->len; ++i) {
3713 const initializer_t *sub_initializer = initializer->initializers[i];
3715 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3716 walk_designator(&path, sub_initializer->designator.designator);
3720 if (sub_initializer->kind == INITIALIZER_VALUE) {
3721 /* we might have to descend into types until we're at a scalar
3724 type_t *orig_top_type = path.top_type;
3725 type_t *top_type = skip_typeref(orig_top_type);
3727 if (is_type_scalar(top_type))
3729 descend_into_subtype(&path);
3731 } else if (sub_initializer->kind == INITIALIZER_STRING
3732 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3733 /* we might have to descend into types until we're at a scalar
3736 type_t *orig_top_type = path.top_type;
3737 type_t *top_type = skip_typeref(orig_top_type);
3739 if (is_string_type(top_type))
3741 descend_into_subtype(&path);
3745 ir_initializer_t *sub_irinitializer
3746 = create_ir_initializer(sub_initializer, path.top_type);
3748 size_t path_len = ARR_LEN(path.path);
3749 assert(path_len >= 1);
3750 type_path_entry_t *entry = & path.path[path_len-1];
3751 ir_initializer_t *tinitializer = entry->initializer;
3752 set_initializer_compound_value(tinitializer, entry->index,
3755 advance_current_object(&path);
3758 assert(ARR_LEN(path.path) >= 1);
3759 ir_initializer_t *result = path.path[0].initializer;
3760 DEL_ARR_F(path.path);
3765 static ir_initializer_t *create_ir_initializer_string(
3766 const initializer_string_t *initializer, type_t *type)
3768 type = skip_typeref(type);
3770 size_t string_len = initializer->string.size;
3771 assert(type->kind == TYPE_ARRAY);
3772 assert(type->array.size_constant);
3773 size_t len = type->array.size;
3774 ir_initializer_t *irinitializer = create_initializer_compound(len);
3776 const char *string = initializer->string.begin;
3777 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3779 for (size_t i = 0; i < len; ++i) {
3784 tarval *tv = new_tarval_from_long(c, mode);
3785 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3787 set_initializer_compound_value(irinitializer, i, char_initializer);
3790 return irinitializer;
3793 static ir_initializer_t *create_ir_initializer_wide_string(
3794 const initializer_wide_string_t *initializer, type_t *type)
3796 size_t string_len = initializer->string.size;
3797 assert(type->kind == TYPE_ARRAY);
3798 assert(type->array.size_constant);
3799 size_t len = type->array.size;
3800 ir_initializer_t *irinitializer = create_initializer_compound(len);
3802 const wchar_rep_t *string = initializer->string.begin;
3803 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3805 for (size_t i = 0; i < len; ++i) {
3807 if (i < string_len) {
3810 tarval *tv = new_tarval_from_long(c, mode);
3811 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3813 set_initializer_compound_value(irinitializer, i, char_initializer);
3816 return irinitializer;
3819 static ir_initializer_t *create_ir_initializer(
3820 const initializer_t *initializer, type_t *type)
3822 switch(initializer->kind) {
3823 case INITIALIZER_STRING:
3824 return create_ir_initializer_string(&initializer->string, type);
3826 case INITIALIZER_WIDE_STRING:
3827 return create_ir_initializer_wide_string(&initializer->wide_string,
3830 case INITIALIZER_LIST:
3831 return create_ir_initializer_list(&initializer->list, type);
3833 case INITIALIZER_VALUE:
3834 return create_ir_initializer_value(&initializer->value);
3836 case INITIALIZER_DESIGNATOR:
3837 panic("unexpected designator initializer found");
3839 panic("unknown initializer");
3842 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3845 if (is_atomic_type(type)) {
3846 ir_mode *mode = get_type_mode(type);
3847 tarval *zero = get_mode_null(mode);
3848 ir_node *cnst = new_d_Const(dbgi, zero);
3850 /* TODO: bitfields */
3851 ir_node *mem = get_store();
3852 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3853 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3856 assert(is_compound_type(type));
3859 if (is_Array_type(type)) {
3860 assert(has_array_upper_bound(type, 0));
3861 n_members = get_array_upper_bound_int(type, 0);
3863 n_members = get_compound_n_members(type);
3866 for (int i = 0; i < n_members; ++i) {
3869 if (is_Array_type(type)) {
3870 ir_entity *entity = get_array_element_entity(type);
3871 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3872 ir_node *cnst = new_d_Const(dbgi, index_tv);
3873 ir_node *in[1] = { cnst };
3874 irtype = get_array_element_type(type);
3875 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3877 ir_entity *member = get_compound_member(type, i);
3879 irtype = get_entity_type(member);
3880 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3883 create_dynamic_null_initializer(irtype, dbgi, addr);
3888 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3889 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3891 switch(get_initializer_kind(initializer)) {
3892 case IR_INITIALIZER_NULL: {
3893 create_dynamic_null_initializer(type, dbgi, base_addr);
3896 case IR_INITIALIZER_CONST: {
3897 ir_node *node = get_initializer_const_value(initializer);
3898 ir_mode *mode = get_irn_mode(node);
3899 ir_type *ent_type = get_entity_type(entity);
3901 /* is it a bitfield type? */
3902 if (is_Primitive_type(ent_type) &&
3903 get_primitive_base_type(ent_type) != NULL) {
3904 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3908 assert(get_type_mode(type) == mode);
3909 ir_node *mem = get_store();
3910 ir_node *store = new_d_Store(dbgi, mem, base_addr, node);
3911 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3915 case IR_INITIALIZER_TARVAL: {
3916 tarval *tv = get_initializer_tarval_value(initializer);
3917 ir_mode *mode = get_tarval_mode(tv);
3918 ir_node *cnst = new_d_Const(dbgi, tv);
3919 ir_type *ent_type = get_entity_type(entity);
3921 /* is it a bitfield type? */
3922 if (is_Primitive_type(ent_type) &&
3923 get_primitive_base_type(ent_type) != NULL) {
3924 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3928 assert(get_type_mode(type) == mode);
3929 ir_node *mem = get_store();
3930 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3931 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3935 case IR_INITIALIZER_COMPOUND: {
3936 assert(is_compound_type(type));
3938 if (is_Array_type(type)) {
3939 assert(has_array_upper_bound(type, 0));
3940 n_members = get_array_upper_bound_int(type, 0);
3942 n_members = get_compound_n_members(type);
3945 if (get_initializer_compound_n_entries(initializer)
3946 != (unsigned) n_members)
3947 panic("initializer doesn't match compound type");
3949 for (int i = 0; i < n_members; ++i) {
3952 ir_entity *sub_entity;
3953 if (is_Array_type(type)) {
3954 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3955 ir_node *cnst = new_d_Const(dbgi, index_tv);
3956 ir_node *in[1] = { cnst };
3957 irtype = get_array_element_type(type);
3958 sub_entity = get_array_element_entity(type);
3959 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3962 sub_entity = get_compound_member(type, i);
3963 irtype = get_entity_type(sub_entity);
3964 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3968 ir_initializer_t *sub_init
3969 = get_initializer_compound_value(initializer, i);
3971 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3978 panic("invalid IR_INITIALIZER found");
3981 static void create_dynamic_initializer(ir_initializer_t *initializer,
3982 dbg_info *dbgi, ir_entity *entity)
3984 ir_node *frame = get_local_frame(entity);
3985 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3986 ir_type *type = get_entity_type(entity);
3988 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3991 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3992 ir_entity *entity, type_t *type)
3994 ir_node *memory = get_store();
3995 ir_node *nomem = new_NoMem();
3996 ir_node *frame = get_irg_frame(current_ir_graph);
3997 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
3999 if (initializer->kind == INITIALIZER_VALUE) {
4000 initializer_value_t *initializer_value = &initializer->value;
4002 ir_node *value = expression_to_firm(initializer_value->value);
4003 type = skip_typeref(type);
4004 assign_value(dbgi, addr, type, value);
4008 if (!is_constant_initializer(initializer)) {
4009 ir_initializer_t *irinitializer
4010 = create_ir_initializer(initializer, type);
4012 create_dynamic_initializer(irinitializer, dbgi, entity);
4016 /* create the ir_initializer */
4017 ir_graph *const old_current_ir_graph = current_ir_graph;
4018 current_ir_graph = get_const_code_irg();
4020 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4022 assert(current_ir_graph == get_const_code_irg());
4023 current_ir_graph = old_current_ir_graph;
4025 /* create a "template" entity which is copied to the entity on the stack */
4026 ident *const id = id_unique("initializer.%u");
4027 ir_type *const irtype = get_ir_type(type);
4028 ir_type *const global_type = get_glob_type();
4029 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4030 set_entity_ld_ident(init_entity, id);
4032 set_entity_variability(init_entity, variability_initialized);
4033 set_entity_visibility(init_entity, visibility_local);
4034 set_entity_allocation(init_entity, allocation_static);
4036 set_entity_initializer(init_entity, irinitializer);
4038 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4039 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4041 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4042 set_store(copyb_mem);
4045 static void create_initializer_local_variable_entity(entity_t *entity)
4047 assert(entity->kind == ENTITY_VARIABLE);
4048 initializer_t *initializer = entity->variable.initializer;
4049 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4050 ir_entity *irentity = entity->variable.v.entity;
4051 type_t *type = entity->declaration.type;
4052 create_local_initializer(initializer, dbgi, irentity, type);
4055 static void create_variable_initializer(entity_t *entity)
4057 assert(entity->kind == ENTITY_VARIABLE);
4058 initializer_t *initializer = entity->variable.initializer;
4059 if (initializer == NULL)
4062 declaration_kind_t declaration_kind
4063 = (declaration_kind_t) entity->declaration.kind;
4064 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4065 create_initializer_local_variable_entity(entity);
4069 type_t *type = entity->declaration.type;
4070 type_qualifiers_t tq = get_type_qualifier(type, true);
4072 if (initializer->kind == INITIALIZER_VALUE) {
4073 initializer_value_t *initializer_value = &initializer->value;
4074 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4076 ir_node *value = expression_to_firm(initializer_value->value);
4078 type_t *type = initializer_value->value->base.type;
4079 ir_mode *mode = get_ir_mode_storage(type);
4080 value = create_conv(dbgi, value, mode);
4081 value = do_strict_conv(dbgi, value);
4083 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4084 set_value(entity->variable.v.value_number, value);
4086 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4088 ir_entity *irentity = entity->variable.v.entity;
4090 if (tq & TYPE_QUALIFIER_CONST) {
4091 set_entity_variability(irentity, variability_constant);
4093 set_entity_variability(irentity, variability_initialized);
4095 set_atomic_ent_value(irentity, value);
4098 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4099 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4101 ir_entity *irentity = entity->variable.v.entity;
4102 ir_initializer_t *irinitializer
4103 = create_ir_initializer(initializer, type);
4105 if (tq & TYPE_QUALIFIER_CONST) {
4106 set_entity_variability(irentity, variability_constant);
4108 set_entity_variability(irentity, variability_initialized);
4110 set_entity_initializer(irentity, irinitializer);
4114 static void create_variable_length_array(entity_t *entity)
4116 assert(entity->kind == ENTITY_VARIABLE);
4117 assert(entity->variable.initializer == NULL);
4119 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4120 entity->variable.v.vla_base = NULL;
4122 /* TODO: record VLA somewhere so we create the free node when we leave
4126 static void allocate_variable_length_array(entity_t *entity)
4128 assert(entity->kind == ENTITY_VARIABLE);
4129 assert(entity->variable.initializer == NULL);
4130 assert(get_cur_block() != NULL);
4132 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4133 type_t *type = entity->declaration.type;
4134 ir_type *el_type = get_ir_type(type->array.element_type);
4136 /* make sure size_node is calculated */
4137 get_type_size(type);
4138 ir_node *elems = type->array.size_node;
4139 ir_node *mem = get_store();
4140 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4142 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4143 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4146 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4147 entity->variable.v.vla_base = addr;
4151 * Creates a Firm local variable from a declaration.
4153 static void create_local_variable(entity_t *entity)
4155 assert(entity->kind == ENTITY_VARIABLE);
4156 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4158 bool needs_entity = entity->variable.address_taken;
4159 type_t *type = skip_typeref(entity->declaration.type);
4161 /* is it a variable length array? */
4162 if (is_type_array(type) && !type->array.size_constant) {
4163 create_variable_length_array(entity);
4165 } else if (is_type_array(type) || is_type_compound(type)) {
4166 needs_entity = true;
4167 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4168 needs_entity = true;
4172 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4173 create_variable_entity(entity,
4174 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4177 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4178 entity->variable.v.value_number = next_value_number_function;
4179 set_irg_loc_description(current_ir_graph, next_value_number_function,
4181 ++next_value_number_function;
4185 static void create_local_static_variable(entity_t *entity)
4187 assert(entity->kind == ENTITY_VARIABLE);
4188 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4190 type_t *const type = skip_typeref(entity->declaration.type);
4191 ir_type *const var_type = entity->variable.thread_local ?
4192 get_tls_type() : get_glob_type();
4193 ir_type *const irtype = get_ir_type(type);
4194 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4196 size_t l = strlen(entity->base.symbol->string);
4197 char buf[l + sizeof(".%u")];
4198 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4199 ident *const id = id_unique(buf);
4201 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4203 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4204 set_entity_volatility(irentity, volatility_is_volatile);
4207 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4208 entity->variable.v.entity = irentity;
4209 set_entity_ld_ident(irentity, id);
4210 set_entity_variability(irentity, variability_uninitialized);
4211 set_entity_visibility(irentity, visibility_local);
4212 set_entity_allocation(irentity, entity->variable.thread_local ?
4213 allocation_automatic : allocation_static);
4215 ir_graph *const old_current_ir_graph = current_ir_graph;
4216 current_ir_graph = get_const_code_irg();
4218 create_variable_initializer(entity);
4220 assert(current_ir_graph == get_const_code_irg());
4221 current_ir_graph = old_current_ir_graph;
4226 static void return_statement_to_firm(return_statement_t *statement)
4228 if (get_cur_block() == NULL)
4231 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4232 type_t *type = current_function_entity->declaration.type;
4233 ir_type *func_irtype = get_ir_type(type);
4238 if (get_method_n_ress(func_irtype) > 0) {
4239 ir_type *res_type = get_method_res_type(func_irtype, 0);
4241 if (statement->value != NULL) {
4242 ir_node *node = expression_to_firm(statement->value);
4243 if (!is_compound_type(res_type)) {
4244 type_t *type = statement->value->base.type;
4245 ir_mode *mode = get_ir_mode_storage(type);
4246 node = create_conv(dbgi, node, mode);
4247 node = do_strict_conv(dbgi, node);
4252 if (is_compound_type(res_type)) {
4255 mode = get_type_mode(res_type);
4257 in[0] = new_Unknown(mode);
4261 /* build return_value for its side effects */
4262 if (statement->value != NULL) {
4263 expression_to_firm(statement->value);
4268 ir_node *store = get_store();
4269 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4271 ir_node *end_block = get_irg_end_block(current_ir_graph);
4272 add_immBlock_pred(end_block, ret);
4274 set_cur_block(NULL);
4277 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4279 if (get_cur_block() == NULL)
4282 return expression_to_firm(statement->expression);
4285 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4287 entity_t *entity = compound->scope.entities;
4288 for ( ; entity != NULL; entity = entity->base.next) {
4289 if (!is_declaration(entity))
4292 create_local_declaration(entity);
4295 ir_node *result = NULL;
4296 statement_t *statement = compound->statements;
4297 for ( ; statement != NULL; statement = statement->base.next) {
4298 if (statement->base.next == NULL
4299 && statement->kind == STATEMENT_EXPRESSION) {
4300 result = expression_statement_to_firm(
4301 &statement->expression);
4304 statement_to_firm(statement);
4310 static void create_global_variable(entity_t *entity)
4312 assert(entity->kind == ENTITY_VARIABLE);
4315 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4316 case STORAGE_CLASS_STATIC: vis = visibility_local; break;
4317 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4318 case STORAGE_CLASS_NONE: vis = visibility_external_visible; break;
4320 default: panic("Invalid storage class for global variable");
4323 ir_type *var_type = entity->variable.thread_local ?
4324 get_tls_type() : get_glob_type();
4325 create_variable_entity(entity,
4326 DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4327 set_entity_visibility(entity->variable.v.entity, vis);
4330 static void create_local_declaration(entity_t *entity)
4332 assert(is_declaration(entity));
4334 /* construct type */
4335 (void) get_ir_type(entity->declaration.type);
4336 if (entity->base.symbol == NULL) {
4340 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4341 case STORAGE_CLASS_STATIC:
4342 create_local_static_variable(entity);
4344 case STORAGE_CLASS_EXTERN:
4345 if (entity->kind == ENTITY_FUNCTION) {
4346 assert(entity->function.statement == NULL);
4347 get_function_entity(entity);
4349 create_global_variable(entity);
4350 create_variable_initializer(entity);
4353 case STORAGE_CLASS_NONE:
4354 case STORAGE_CLASS_AUTO:
4355 case STORAGE_CLASS_REGISTER:
4356 if (entity->kind == ENTITY_FUNCTION) {
4357 if (entity->function.statement != NULL) {
4358 get_function_entity(entity);
4359 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4360 enqueue_inner_function(entity);
4362 get_function_entity(entity);
4365 create_local_variable(entity);
4368 case STORAGE_CLASS_TYPEDEF:
4371 panic("invalid storage class found");
4374 static void initialize_local_declaration(entity_t *entity)
4376 if (entity->base.symbol == NULL)
4379 switch ((declaration_kind_t) entity->declaration.kind) {
4380 case DECLARATION_KIND_LOCAL_VARIABLE:
4381 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4382 create_variable_initializer(entity);
4385 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4386 allocate_variable_length_array(entity);
4389 case DECLARATION_KIND_COMPOUND_MEMBER:
4390 case DECLARATION_KIND_GLOBAL_VARIABLE:
4391 case DECLARATION_KIND_FUNCTION:
4392 case DECLARATION_KIND_INNER_FUNCTION:
4395 case DECLARATION_KIND_PARAMETER:
4396 case DECLARATION_KIND_PARAMETER_ENTITY:
4397 panic("can't initialize parameters");
4399 case DECLARATION_KIND_UNKNOWN:
4400 panic("can't initialize unknown declaration");
4402 panic("invalid declaration kind");
4405 static void declaration_statement_to_firm(declaration_statement_t *statement)
4407 entity_t * entity = statement->declarations_begin;
4408 entity_t *const last = statement->declarations_end;
4409 if (entity != NULL) {
4410 for ( ;; entity = entity->base.next) {
4411 if (is_declaration(entity)) {
4412 initialize_local_declaration(entity);
4413 } else if (entity->kind == ENTITY_TYPEDEF) {
4414 type_t *const type = skip_typeref(entity->typedefe.type);
4415 if (is_type_array(type) && type->array.is_vla)
4416 get_vla_size(&type->array);
4424 static void if_statement_to_firm(if_statement_t *statement)
4426 ir_node *cur_block = get_cur_block();
4428 ir_node *fallthrough_block = NULL;
4430 /* the true (blocks) */
4431 ir_node *true_block = NULL;
4432 if (statement->true_statement != NULL) {
4433 true_block = new_immBlock();
4434 set_cur_block(true_block);
4435 statement_to_firm(statement->true_statement);
4436 if (get_cur_block() != NULL) {
4437 ir_node *jmp = new_Jmp();
4438 if (fallthrough_block == NULL)
4439 fallthrough_block = new_immBlock();
4440 add_immBlock_pred(fallthrough_block, jmp);
4444 /* the false (blocks) */
4445 ir_node *false_block = NULL;
4446 if (statement->false_statement != NULL) {
4447 false_block = new_immBlock();
4448 set_cur_block(false_block);
4450 statement_to_firm(statement->false_statement);
4451 if (get_cur_block() != NULL) {
4452 ir_node *jmp = new_Jmp();
4453 if (fallthrough_block == NULL)
4454 fallthrough_block = new_immBlock();
4455 add_immBlock_pred(fallthrough_block, jmp);
4459 /* create the condition */
4460 if (cur_block != NULL) {
4461 if (true_block == NULL || false_block == NULL) {
4462 if (fallthrough_block == NULL)
4463 fallthrough_block = new_immBlock();
4464 if (true_block == NULL)
4465 true_block = fallthrough_block;
4466 if (false_block == NULL)
4467 false_block = fallthrough_block;
4470 set_cur_block(cur_block);
4471 create_condition_evaluation(statement->condition, true_block,
4475 mature_immBlock(true_block);
4476 if (false_block != fallthrough_block && false_block != NULL) {
4477 mature_immBlock(false_block);
4479 if (fallthrough_block != NULL) {
4480 mature_immBlock(fallthrough_block);
4483 set_cur_block(fallthrough_block);
4486 static void while_statement_to_firm(while_statement_t *statement)
4488 ir_node *jmp = NULL;
4489 if (get_cur_block() != NULL) {
4493 /* create the header block */
4494 ir_node *header_block = new_immBlock();
4496 add_immBlock_pred(header_block, jmp);
4500 ir_node *old_continue_label = continue_label;
4501 ir_node *old_break_label = break_label;
4502 continue_label = header_block;
4505 ir_node *body_block = new_immBlock();
4506 set_cur_block(body_block);
4507 statement_to_firm(statement->body);
4508 ir_node *false_block = break_label;
4510 assert(continue_label == header_block);
4511 continue_label = old_continue_label;
4512 break_label = old_break_label;
4514 if (get_cur_block() != NULL) {
4516 add_immBlock_pred(header_block, jmp);
4519 /* shortcut for while(true) */
4520 if (is_constant_expression(statement->condition)
4521 && fold_constant(statement->condition) != 0) {
4522 set_cur_block(header_block);
4523 ir_node *header_jmp = new_Jmp();
4524 add_immBlock_pred(body_block, header_jmp);
4526 keep_alive(body_block);
4527 keep_all_memory(body_block);
4528 set_cur_block(body_block);
4530 if (false_block == NULL) {
4531 false_block = new_immBlock();
4534 /* create the condition */
4535 set_cur_block(header_block);
4537 create_condition_evaluation(statement->condition, body_block,
4541 mature_immBlock(body_block);
4542 mature_immBlock(header_block);
4543 if (false_block != NULL) {
4544 mature_immBlock(false_block);
4547 set_cur_block(false_block);
4550 static void do_while_statement_to_firm(do_while_statement_t *statement)
4552 ir_node *jmp = NULL;
4553 if (get_cur_block() != NULL) {
4557 /* create the header block */
4558 ir_node *header_block = new_immBlock();
4561 ir_node *body_block = new_immBlock();
4563 add_immBlock_pred(body_block, jmp);
4566 ir_node *old_continue_label = continue_label;
4567 ir_node *old_break_label = break_label;
4568 continue_label = header_block;
4571 set_cur_block(body_block);
4572 statement_to_firm(statement->body);
4573 ir_node *false_block = break_label;
4575 assert(continue_label == header_block);
4576 continue_label = old_continue_label;
4577 break_label = old_break_label;
4579 if (get_cur_block() != NULL) {
4580 ir_node *body_jmp = new_Jmp();
4581 add_immBlock_pred(header_block, body_jmp);
4582 mature_immBlock(header_block);
4585 if (false_block == NULL) {
4586 false_block = new_immBlock();
4589 /* create the condition */
4590 set_cur_block(header_block);
4592 create_condition_evaluation(statement->condition, body_block, false_block);
4593 mature_immBlock(body_block);
4594 mature_immBlock(header_block);
4595 mature_immBlock(false_block);
4597 set_cur_block(false_block);
4600 static void for_statement_to_firm(for_statement_t *statement)
4602 ir_node *jmp = NULL;
4604 /* create declarations */
4605 entity_t *entity = statement->scope.entities;
4606 for ( ; entity != NULL; entity = entity->base.next) {
4607 if (!is_declaration(entity))
4610 create_local_declaration(entity);
4613 if (get_cur_block() != NULL) {
4614 entity = statement->scope.entities;
4615 for ( ; entity != NULL; entity = entity->base.next) {
4616 if (!is_declaration(entity))
4619 initialize_local_declaration(entity);
4622 if (statement->initialisation != NULL) {
4623 expression_to_firm(statement->initialisation);
4630 /* create the step block */
4631 ir_node *const step_block = new_immBlock();
4632 set_cur_block(step_block);
4633 if (statement->step != NULL) {
4634 expression_to_firm(statement->step);
4636 ir_node *const step_jmp = new_Jmp();
4638 /* create the header block */
4639 ir_node *const header_block = new_immBlock();
4640 set_cur_block(header_block);
4642 add_immBlock_pred(header_block, jmp);
4644 add_immBlock_pred(header_block, step_jmp);
4646 /* the false block */
4647 ir_node *const false_block = new_immBlock();
4650 ir_node *body_block;
4651 if (statement->body != NULL) {
4652 ir_node *const old_continue_label = continue_label;
4653 ir_node *const old_break_label = break_label;
4654 continue_label = step_block;
4655 break_label = false_block;
4657 body_block = new_immBlock();
4658 set_cur_block(body_block);
4659 statement_to_firm(statement->body);
4661 assert(continue_label == step_block);
4662 assert(break_label == false_block);
4663 continue_label = old_continue_label;
4664 break_label = old_break_label;
4666 if (get_cur_block() != NULL) {
4668 add_immBlock_pred(step_block, jmp);
4671 body_block = step_block;
4674 /* create the condition */
4675 set_cur_block(header_block);
4676 if (statement->condition != NULL) {
4677 create_condition_evaluation(statement->condition, body_block,
4680 keep_alive(header_block);
4681 keep_all_memory(header_block);
4683 add_immBlock_pred(body_block, jmp);
4686 mature_immBlock(body_block);
4687 mature_immBlock(false_block);
4688 mature_immBlock(step_block);
4689 mature_immBlock(header_block);
4690 mature_immBlock(false_block);
4692 set_cur_block(false_block);
4695 static void create_jump_statement(const statement_t *statement,
4696 ir_node *target_block)
4698 if (get_cur_block() == NULL)
4701 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4702 ir_node *jump = new_d_Jmp(dbgi);
4703 add_immBlock_pred(target_block, jump);
4705 set_cur_block(NULL);
4708 static ir_node *get_break_label(void)
4710 if (break_label == NULL) {
4711 break_label = new_immBlock();
4716 static void switch_statement_to_firm(switch_statement_t *statement)
4718 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4720 ir_node *expression = expression_to_firm(statement->expression);
4721 ir_node *cond = new_d_Cond(dbgi, expression);
4723 set_cur_block(NULL);
4725 ir_node *const old_switch_cond = current_switch_cond;
4726 ir_node *const old_break_label = break_label;
4727 const bool old_saw_default_label = saw_default_label;
4728 saw_default_label = false;
4729 current_switch_cond = cond;
4731 switch_statement_t *const old_switch = current_switch;
4732 current_switch = statement;
4734 /* determine a free number for the default label */
4735 unsigned long num_cases = 0;
4737 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4738 if (l->expression == NULL) {
4742 if (l->last_case >= l->first_case)
4743 num_cases += l->last_case - l->first_case + 1;
4744 if (l->last_case > def_nr)
4745 def_nr = l->last_case;
4748 if (def_nr == INT_MAX) {
4749 /* Bad: an overflow will occurr, we cannot be sure that the
4750 * maximum + 1 is a free number. Scan the values a second
4751 * time to find a free number.
4753 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4755 memset(bits, 0, (num_cases + 7) >> 3);
4756 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4757 if (l->expression == NULL) {
4761 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4762 if (start < num_cases && l->last_case >= 0) {
4763 unsigned long end = (unsigned long)l->last_case < num_cases ?
4764 (unsigned long)l->last_case : num_cases - 1;
4765 for (unsigned long cns = start; cns <= end; ++cns) {
4766 bits[cns >> 3] |= (1 << (cns & 7));
4770 /* We look at the first num_cases constants:
4771 * Either they are densed, so we took the last (num_cases)
4772 * one, or they are non densed, so we will find one free
4776 for (i = 0; i < num_cases; ++i)
4777 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4785 statement->default_proj_nr = def_nr;
4787 if (statement->body != NULL) {
4788 statement_to_firm(statement->body);
4791 if (get_cur_block() != NULL) {
4792 ir_node *jmp = new_Jmp();
4793 add_immBlock_pred(get_break_label(), jmp);
4796 if (!saw_default_label) {
4797 set_cur_block(get_nodes_block(cond));
4798 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4799 statement->default_proj_nr);
4800 add_immBlock_pred(get_break_label(), proj);
4803 if (break_label != NULL) {
4804 mature_immBlock(break_label);
4806 set_cur_block(break_label);
4808 assert(current_switch_cond == cond);
4809 current_switch = old_switch;
4810 current_switch_cond = old_switch_cond;
4811 break_label = old_break_label;
4812 saw_default_label = old_saw_default_label;
4815 static void case_label_to_firm(const case_label_statement_t *statement)
4817 if (statement->is_empty_range)
4820 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4822 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4825 ir_node *block = new_immBlock();
4827 set_cur_block(get_nodes_block(current_switch_cond));
4828 if (statement->expression != NULL) {
4829 long pn = statement->first_case;
4830 long end_pn = statement->last_case;
4831 assert(pn <= end_pn);
4832 /* create jumps for all cases in the given range */
4834 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4835 add_immBlock_pred(block, proj);
4836 } while(pn++ < end_pn);
4838 saw_default_label = true;
4839 proj = new_d_defaultProj(dbgi, current_switch_cond,
4840 current_switch->default_proj_nr);
4842 add_immBlock_pred(block, proj);
4845 if (fallthrough != NULL) {
4846 add_immBlock_pred(block, fallthrough);
4848 mature_immBlock(block);
4849 set_cur_block(block);
4851 if (statement->statement != NULL) {
4852 statement_to_firm(statement->statement);
4856 static void label_to_firm(const label_statement_t *statement)
4858 ir_node *block = get_label_block(statement->label);
4860 if (get_cur_block() != NULL) {
4861 ir_node *jmp = new_Jmp();
4862 add_immBlock_pred(block, jmp);
4865 set_cur_block(block);
4867 keep_all_memory(block);
4869 if (statement->statement != NULL) {
4870 statement_to_firm(statement->statement);
4874 static void goto_to_firm(const goto_statement_t *statement)
4876 if (get_cur_block() == NULL)
4879 if (statement->expression) {
4880 ir_node *irn = expression_to_firm(statement->expression);
4881 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4882 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4884 set_irn_link(ijmp, ijmp_list);
4887 ir_node *block = get_label_block(statement->label);
4888 ir_node *jmp = new_Jmp();
4889 add_immBlock_pred(block, jmp);
4891 set_cur_block(NULL);
4894 static void asm_statement_to_firm(const asm_statement_t *statement)
4896 bool needs_memory = false;
4898 if (statement->is_volatile) {
4899 needs_memory = true;
4902 size_t n_clobbers = 0;
4903 asm_clobber_t *clobber = statement->clobbers;
4904 for ( ; clobber != NULL; clobber = clobber->next) {
4905 const char *clobber_str = clobber->clobber.begin;
4907 if (!be_is_valid_clobber(clobber_str)) {
4908 errorf(&statement->base.source_position,
4909 "invalid clobber '%s' specified", clobber->clobber);
4913 if (strcmp(clobber_str, "memory") == 0) {
4914 needs_memory = true;
4918 ident *id = new_id_from_str(clobber_str);
4919 obstack_ptr_grow(&asm_obst, id);
4922 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4923 ident **clobbers = NULL;
4924 if (n_clobbers > 0) {
4925 clobbers = obstack_finish(&asm_obst);
4928 size_t n_inputs = 0;
4929 asm_argument_t *argument = statement->inputs;
4930 for ( ; argument != NULL; argument = argument->next)
4932 size_t n_outputs = 0;
4933 argument = statement->outputs;
4934 for ( ; argument != NULL; argument = argument->next)
4937 unsigned next_pos = 0;
4939 ir_node *ins[n_inputs + n_outputs + 1];
4942 ir_asm_constraint tmp_in_constraints[n_outputs];
4944 const expression_t *out_exprs[n_outputs];
4945 ir_node *out_addrs[n_outputs];
4946 size_t out_size = 0;
4948 argument = statement->outputs;
4949 for ( ; argument != NULL; argument = argument->next) {
4950 const char *constraints = argument->constraints.begin;
4951 asm_constraint_flags_t asm_flags
4952 = be_parse_asm_constraints(constraints);
4954 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4955 warningf(&statement->base.source_position,
4956 "some constraints in '%s' are not supported", constraints);
4958 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4959 errorf(&statement->base.source_position,
4960 "some constraints in '%s' are invalid", constraints);
4963 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4964 errorf(&statement->base.source_position,
4965 "no write flag specified for output constraints '%s'",
4970 unsigned pos = next_pos++;
4971 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4972 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4973 expression_t *expr = argument->expression;
4974 ir_node *addr = expression_to_addr(expr);
4975 /* in+output, construct an artifical same_as constraint on the
4977 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4979 ir_node *value = get_value_from_lvalue(expr, addr);
4981 snprintf(buf, sizeof(buf), "%u", pos);
4983 ir_asm_constraint constraint;
4984 constraint.pos = pos;
4985 constraint.constraint = new_id_from_str(buf);
4986 constraint.mode = get_ir_mode_storage(expr->base.type);
4987 tmp_in_constraints[in_size] = constraint;
4988 ins[in_size] = value;
4993 out_exprs[out_size] = expr;
4994 out_addrs[out_size] = addr;
4996 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4997 /* pure memory ops need no input (but we have to make sure we
4998 * attach to the memory) */
4999 assert(! (asm_flags &
5000 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5001 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5002 needs_memory = true;
5004 /* we need to attach the address to the inputs */
5005 expression_t *expr = argument->expression;
5007 ir_asm_constraint constraint;
5008 constraint.pos = pos;
5009 constraint.constraint = new_id_from_str(constraints);
5010 constraint.mode = NULL;
5011 tmp_in_constraints[in_size] = constraint;
5013 ins[in_size] = expression_to_addr(expr);
5017 errorf(&statement->base.source_position,
5018 "only modifiers but no place set in constraints '%s'",
5023 ir_asm_constraint constraint;
5024 constraint.pos = pos;
5025 constraint.constraint = new_id_from_str(constraints);
5026 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5028 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5030 assert(obstack_object_size(&asm_obst)
5031 == out_size * sizeof(ir_asm_constraint));
5032 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5035 obstack_grow(&asm_obst, tmp_in_constraints,
5036 in_size * sizeof(tmp_in_constraints[0]));
5037 /* find and count input and output arguments */
5038 argument = statement->inputs;
5039 for ( ; argument != NULL; argument = argument->next) {
5040 const char *constraints = argument->constraints.begin;
5041 asm_constraint_flags_t asm_flags
5042 = be_parse_asm_constraints(constraints);
5044 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5045 errorf(&statement->base.source_position,
5046 "some constraints in '%s' are not supported", constraints);
5049 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5050 errorf(&statement->base.source_position,
5051 "some constraints in '%s' are invalid", constraints);
5054 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5055 errorf(&statement->base.source_position,
5056 "write flag specified for input constraints '%s'",
5062 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5063 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5064 /* we can treat this as "normal" input */
5065 input = expression_to_firm(argument->expression);
5066 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5067 /* pure memory ops need no input (but we have to make sure we
5068 * attach to the memory) */
5069 assert(! (asm_flags &
5070 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5071 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5072 needs_memory = true;
5073 input = expression_to_addr(argument->expression);
5075 errorf(&statement->base.source_position,
5076 "only modifiers but no place set in constraints '%s'",
5081 ir_asm_constraint constraint;
5082 constraint.pos = next_pos++;
5083 constraint.constraint = new_id_from_str(constraints);
5084 constraint.mode = get_irn_mode(input);
5086 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5087 ins[in_size++] = input;
5091 ir_asm_constraint constraint;
5092 constraint.pos = next_pos++;
5093 constraint.constraint = new_id_from_str("");
5094 constraint.mode = mode_M;
5096 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5097 ins[in_size++] = get_store();
5100 assert(obstack_object_size(&asm_obst)
5101 == in_size * sizeof(ir_asm_constraint));
5102 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5104 /* create asm node */
5105 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5107 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5109 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5110 out_size, output_constraints,
5111 n_clobbers, clobbers, asm_text);
5113 if (statement->is_volatile) {
5114 set_irn_pinned(node, op_pin_state_pinned);
5116 set_irn_pinned(node, op_pin_state_floats);
5119 /* create output projs & connect them */
5121 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5126 for (i = 0; i < out_size; ++i) {
5127 const expression_t *out_expr = out_exprs[i];
5129 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5130 ir_node *proj = new_Proj(node, mode, pn);
5131 ir_node *addr = out_addrs[i];
5133 set_value_for_expression_addr(out_expr, proj, addr);
5137 static void ms_try_statement_to_firm(ms_try_statement_t *statement) {
5138 statement_to_firm(statement->try_statement);
5139 warningf(&statement->base.source_position, "structured exception handling ignored");
5142 static void leave_statement_to_firm(leave_statement_t *statement) {
5143 errorf(&statement->base.source_position, "__leave not supported yet");
5147 * Transform a statement.
5149 static void statement_to_firm(statement_t *statement)
5152 assert(!statement->base.transformed);
5153 statement->base.transformed = true;
5156 switch (statement->kind) {
5157 case STATEMENT_INVALID:
5158 panic("invalid statement found");
5159 case STATEMENT_EMPTY:
5162 case STATEMENT_COMPOUND:
5163 compound_statement_to_firm(&statement->compound);
5165 case STATEMENT_RETURN:
5166 return_statement_to_firm(&statement->returns);
5168 case STATEMENT_EXPRESSION:
5169 expression_statement_to_firm(&statement->expression);
5172 if_statement_to_firm(&statement->ifs);
5174 case STATEMENT_WHILE:
5175 while_statement_to_firm(&statement->whiles);
5177 case STATEMENT_DO_WHILE:
5178 do_while_statement_to_firm(&statement->do_while);
5180 case STATEMENT_DECLARATION:
5181 declaration_statement_to_firm(&statement->declaration);
5183 case STATEMENT_BREAK:
5184 create_jump_statement(statement, get_break_label());
5186 case STATEMENT_CONTINUE:
5187 create_jump_statement(statement, continue_label);
5189 case STATEMENT_SWITCH:
5190 switch_statement_to_firm(&statement->switchs);
5192 case STATEMENT_CASE_LABEL:
5193 case_label_to_firm(&statement->case_label);
5196 for_statement_to_firm(&statement->fors);
5198 case STATEMENT_LABEL:
5199 label_to_firm(&statement->label);
5201 case STATEMENT_GOTO:
5202 goto_to_firm(&statement->gotos);
5205 asm_statement_to_firm(&statement->asms);
5207 case STATEMENT_MS_TRY:
5208 ms_try_statement_to_firm(&statement->ms_try);
5210 case STATEMENT_LEAVE:
5211 leave_statement_to_firm(&statement->leave);
5214 panic("statement not implemented");
5217 static int count_local_variables(const entity_t *entity,
5218 const entity_t *const last)
5221 for (; entity != NULL; entity = entity->base.next) {
5225 if (entity->kind == ENTITY_VARIABLE) {
5226 type = skip_typeref(entity->declaration.type);
5227 address_taken = entity->variable.address_taken;
5228 } else if (entity->kind == ENTITY_PARAMETER) {
5229 type = skip_typeref(entity->declaration.type);
5230 address_taken = entity->parameter.address_taken;
5235 if (!address_taken && is_type_scalar(type))
5244 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5246 int *const count = env;
5248 switch (stmt->kind) {
5249 case STATEMENT_DECLARATION: {
5250 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5251 *count += count_local_variables(decl_stmt->declarations_begin,
5252 decl_stmt->declarations_end);
5257 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5265 static int get_function_n_local_vars(entity_t *entity)
5269 /* count parameters */
5270 count += count_local_variables(entity->function.parameters.entities, NULL);
5272 /* count local variables declared in body */
5273 walk_statements(entity->function.statement, count_local_variables_in_stmt,
5278 static void initialize_function_parameters(entity_t *entity)
5280 assert(entity->kind == ENTITY_FUNCTION);
5281 ir_graph *irg = current_ir_graph;
5282 ir_node *args = get_irg_args(irg);
5283 ir_node *start_block = get_irg_start_block(irg);
5284 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5287 entity_t *parameter = entity->function.parameters.entities;
5288 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5289 assert(parameter->kind == ENTITY_PARAMETER);
5290 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5291 type_t *type = skip_typeref(parameter->declaration.type);
5293 bool needs_entity = parameter->parameter.address_taken;
5294 assert(!is_type_array(type));
5295 if (is_type_compound(type)) {
5296 needs_entity = true;
5300 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5301 ident *id = new_id_from_str(parameter->base.symbol->string);
5302 set_entity_ident(entity, id);
5304 parameter->declaration.kind
5305 = DECLARATION_KIND_PARAMETER_ENTITY;
5306 parameter->parameter.v.entity = entity;
5310 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5311 ir_mode *param_mode = get_type_mode(param_irtype);
5314 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5316 ir_mode *mode = get_ir_mode_storage(type);
5317 value = create_conv(NULL, value, mode);
5318 value = do_strict_conv(NULL, value);
5320 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5321 parameter->parameter.v.value_number = next_value_number_function;
5322 set_irg_loc_description(current_ir_graph, next_value_number_function,
5324 ++next_value_number_function;
5326 set_value(parameter->parameter.v.value_number, value);
5331 * Handle additional decl modifiers for IR-graphs
5333 * @param irg the IR-graph
5334 * @param dec_modifiers additional modifiers
5336 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5338 if (decl_modifiers & DM_RETURNS_TWICE) {
5339 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5340 set_irg_additional_property(irg, mtp_property_returns_twice);
5342 if (decl_modifiers & DM_NORETURN) {
5343 /* TRUE if the declaration includes the Microsoft
5344 __declspec(noreturn) specifier. */
5345 set_irg_additional_property(irg, mtp_property_noreturn);
5347 if (decl_modifiers & DM_NOTHROW) {
5348 /* TRUE if the declaration includes the Microsoft
5349 __declspec(nothrow) specifier. */
5350 set_irg_additional_property(irg, mtp_property_nothrow);
5352 if (decl_modifiers & DM_NAKED) {
5353 /* TRUE if the declaration includes the Microsoft
5354 __declspec(naked) specifier. */
5355 set_irg_additional_property(irg, mtp_property_naked);
5357 if (decl_modifiers & DM_FORCEINLINE) {
5358 /* TRUE if the declaration includes the
5359 Microsoft __forceinline specifier. */
5360 set_irg_inline_property(irg, irg_inline_forced);
5362 if (decl_modifiers & DM_NOINLINE) {
5363 /* TRUE if the declaration includes the Microsoft
5364 __declspec(noinline) specifier. */
5365 set_irg_inline_property(irg, irg_inline_forbidden);
5369 static void add_function_pointer(ir_type *segment, ir_entity *method,
5370 const char *unique_template)
5372 ir_type *method_type = get_entity_type(method);
5373 ident *id = id_unique(unique_template);
5374 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5376 ident *ide = id_unique(unique_template);
5377 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5378 ir_graph *irg = get_const_code_irg();
5379 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5382 set_entity_compiler_generated(ptr, 1);
5383 set_entity_variability(ptr, variability_constant);
5384 set_atomic_ent_value(ptr, val);
5388 * Generate possible IJmp branches to a given label block.
5390 static void gen_ijmp_branches(ir_node *block) {
5392 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5393 add_immBlock_pred(block, ijmp);
5398 * Create code for a function.
5400 static void create_function(entity_t *entity)
5402 assert(entity->kind == ENTITY_FUNCTION);
5403 ir_entity *function_entity = get_function_entity(entity);
5405 if (entity->function.statement == NULL)
5408 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5409 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5410 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5412 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5413 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5414 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5417 current_function_entity = entity;
5418 current_function_name = NULL;
5419 current_funcsig = NULL;
5421 assert(all_labels == NULL);
5422 all_labels = NEW_ARR_F(label_t *, 0);
5425 int n_local_vars = get_function_n_local_vars(entity);
5426 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5428 ir_graph *old_current_function = current_function;
5429 current_function = irg;
5431 set_irg_fp_model(irg, firm_opt.fp_model);
5432 tarval_enable_fp_ops(1);
5433 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5435 ir_node *first_block = get_cur_block();
5437 /* set inline flags */
5438 if (entity->function.is_inline)
5439 set_irg_inline_property(irg, irg_inline_recomended);
5440 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5442 next_value_number_function = 0;
5443 initialize_function_parameters(entity);
5445 statement_to_firm(entity->function.statement);
5447 ir_node *end_block = get_irg_end_block(irg);
5449 /* do we have a return statement yet? */
5450 if (get_cur_block() != NULL) {
5451 type_t *type = skip_typeref(entity->declaration.type);
5452 assert(is_type_function(type));
5453 const function_type_t *func_type = &type->function;
5454 const type_t *return_type
5455 = skip_typeref(func_type->return_type);
5458 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5459 ret = new_Return(get_store(), 0, NULL);
5462 if (is_type_scalar(return_type)) {
5463 mode = get_ir_mode_storage(func_type->return_type);
5469 /* ยง5.1.2.2.3 main implicitly returns 0 */
5470 if (is_main(entity)) {
5471 in[0] = new_Const(get_mode_null(mode));
5473 in[0] = new_Unknown(mode);
5475 ret = new_Return(get_store(), 1, in);
5477 add_immBlock_pred(end_block, ret);
5480 bool has_computed_gotos = false;
5481 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5482 label_t *label = all_labels[i];
5483 if (label->address_taken) {
5484 gen_ijmp_branches(label->block);
5485 has_computed_gotos = true;
5487 mature_immBlock(label->block);
5489 if (has_computed_gotos) {
5490 /* if we have computed goto's in the function, we cannot inline it */
5491 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5492 warningf(&entity->base.source_position,
5493 "function '%Y' can never be inlined because it contains a computed goto",
5494 entity->base.symbol);
5496 set_irg_inline_property(irg, irg_inline_forbidden);
5499 DEL_ARR_F(all_labels);
5502 mature_immBlock(first_block);
5503 mature_immBlock(end_block);
5505 irg_finalize_cons(irg);
5507 /* finalize the frame type */
5508 ir_type *frame_type = get_irg_frame_type(irg);
5509 int n = get_compound_n_members(frame_type);
5512 for (int i = 0; i < n; ++i) {
5513 ir_entity *entity = get_compound_member(frame_type, i);
5514 ir_type *entity_type = get_entity_type(entity);
5516 int align = get_type_alignment_bytes(entity_type);
5517 if (align > align_all)
5521 misalign = offset % align;
5523 offset += align - misalign;
5527 set_entity_offset(entity, offset);
5528 offset += get_type_size_bytes(entity_type);
5530 set_type_size_bytes(frame_type, offset);
5531 set_type_alignment_bytes(frame_type, align_all);
5534 current_function = old_current_function;
5536 /* create inner functions */
5538 for (inner = next_inner_function(); inner != NULL;
5539 inner = next_inner_function()) {
5540 create_function(inner);
5544 static void scope_to_firm(scope_t *scope)
5546 /* first pass: create declarations */
5547 entity_t *entity = scope->entities;
5548 for ( ; entity != NULL; entity = entity->base.next) {
5549 if (entity->base.symbol == NULL)
5552 if (entity->kind == ENTITY_FUNCTION) {
5553 get_function_entity(entity);
5554 } else if (entity->kind == ENTITY_VARIABLE) {
5555 create_global_variable(entity);
5559 /* second pass: create code/initializers */
5560 entity = scope->entities;
5561 for ( ; entity != NULL; entity = entity->base.next) {
5562 if (entity->base.symbol == NULL)
5565 if (entity->kind == ENTITY_FUNCTION) {
5566 create_function(entity);
5567 } else if (entity->kind == ENTITY_VARIABLE) {
5568 assert(entity->declaration.kind
5569 == DECLARATION_KIND_GLOBAL_VARIABLE);
5570 current_ir_graph = get_const_code_irg();
5571 create_variable_initializer(entity);
5576 void init_ast2firm(void)
5578 obstack_init(&asm_obst);
5579 init_atomic_modes();
5581 /* OS option must be set to the backend */
5582 switch (firm_opt.os_support) {
5583 case OS_SUPPORT_MINGW:
5584 create_ld_ident = create_name_win32;
5586 case OS_SUPPORT_LINUX:
5587 create_ld_ident = create_name_linux_elf;
5589 case OS_SUPPORT_MACHO:
5590 create_ld_ident = create_name_macho;
5593 panic("unexpected OS support mode");
5596 /* create idents for all known runtime functions */
5597 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5598 rts_idents[i] = new_id_from_str(rts_data[i].name);
5601 entitymap_init(&entitymap);
5604 static void init_ir_types(void)
5606 static int ir_types_initialized = 0;
5607 if (ir_types_initialized)
5609 ir_types_initialized = 1;
5611 ir_type_int = get_ir_type(type_int);
5612 ir_type_const_char = get_ir_type(type_const_char);
5613 ir_type_wchar_t = get_ir_type(type_wchar_t);
5614 ir_type_void = get_ir_type(type_void);
5616 const backend_params *be_params = be_get_backend_param();
5617 mode_float_arithmetic = be_params->mode_float_arithmetic;
5620 void exit_ast2firm(void)
5622 entitymap_destroy(&entitymap);
5623 obstack_free(&asm_obst, NULL);
5626 static void global_asm_to_firm(statement_t *s)
5628 for (; s != NULL; s = s->base.next) {
5629 assert(s->kind == STATEMENT_ASM);
5631 char const *const text = s->asms.asm_text.begin;
5632 size_t size = s->asms.asm_text.size;
5634 /* skip the last \0 */
5635 if (text[size - 1] == '\0')
5638 ident *const id = new_id_from_chars(text, size);
5643 void translation_unit_to_firm(translation_unit_t *unit)
5645 /* just to be sure */
5646 continue_label = NULL;
5648 current_switch_cond = NULL;
5649 current_translation_unit = unit;
5652 inner_functions = NEW_ARR_F(entity_t *, 0);
5654 scope_to_firm(&unit->scope);
5655 global_asm_to_firm(unit->global_asm);
5657 DEL_ARR_F(inner_functions);
5658 inner_functions = NULL;
5660 current_ir_graph = NULL;
5661 current_translation_unit = NULL;