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_atomic_type_size(type->enumt.akind);
269 case TYPE_COMPOUND_UNION:
270 case TYPE_COMPOUND_STRUCT:
271 return get_compound_type_size(&type->compound);
273 /* just a pointer to the function */
274 return get_mode_size_bytes(mode_P_code);
277 return get_mode_size_bytes(mode_P_data);
279 return get_array_type_size(&type->array);
281 return get_type_size_const(type->builtin.real_type);
283 panic("type size of bitfield request");
289 panic("Trying to determine size of invalid type");
292 static ir_node *get_vla_size(array_type_t *const type)
294 ir_node *size_node = type->size_node;
295 if (size_node == NULL) {
296 size_node = expression_to_firm(type->size_expression);
297 type->size_node = size_node;
302 static ir_node *get_type_size(type_t *type)
304 type = skip_typeref(type);
306 if (is_type_array(type) && type->array.is_vla) {
307 ir_node *size_node = get_vla_size(&type->array);
308 ir_node *elem_size = get_type_size(type->array.element_type);
309 ir_mode *mode = get_irn_mode(size_node);
310 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
314 ir_mode *mode = get_ir_mode_storage(type_size_t);
316 sym.type_p = get_ir_type(type);
317 return new_SymConst(mode, sym, symconst_type_size);
320 static unsigned count_parameters(const function_type_t *function_type)
324 function_parameter_t *parameter = function_type->parameters;
325 for ( ; parameter != NULL; parameter = parameter->next) {
332 static type_t *get_aligned_type(type_t *type, int alignment)
337 type = skip_typeref(type);
338 if (alignment > type->base.alignment) {
339 type_t *copy = duplicate_type(type);
340 copy->base.alignment = alignment;
341 type = identify_new_type(copy);
347 * Creates a Firm type for an atomic type
349 static ir_type *create_atomic_type(atomic_type_kind_t akind, int alignment)
351 ir_mode *mode = atomic_modes[akind];
352 ident *id = get_mode_ident(mode);
353 ir_type *irtype = new_type_primitive(id, mode);
355 set_type_alignment_bytes(irtype, alignment);
361 * Creates a Firm type for a complex type
363 static ir_type *create_complex_type(const complex_type_t *type)
365 atomic_type_kind_t kind = type->akind;
366 ir_mode *mode = atomic_modes[kind];
367 ident *id = get_mode_ident(mode);
371 /* FIXME: finish the array */
376 * Creates a Firm type for an imaginary type
378 static ir_type *create_imaginary_type(const imaginary_type_t *type)
380 atomic_type_kind_t kind = type->akind;
381 ir_mode *mode = atomic_modes[kind];
382 ident *id = get_mode_ident(mode);
383 ir_type *irtype = new_type_primitive(id, mode);
385 set_type_alignment_bytes(irtype, type->base.alignment);
391 * return type of a parameter (and take transparent union gnu extension into
394 static type_t *get_parameter_type(type_t *type)
396 type = skip_typeref(type);
397 if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
398 compound_t *compound = type->compound.compound;
399 type = compound->members.entities->declaration.type;
405 static ir_type *create_method_type(const function_type_t *function_type)
407 type_t *return_type = skip_typeref(function_type->return_type);
409 ident *id = id_unique("functiontype.%u");
410 int n_parameters = count_parameters(function_type);
411 int n_results = return_type == type_void ? 0 : 1;
412 ir_type *irtype = new_type_method(id, n_parameters, n_results);
414 if (return_type != type_void) {
415 ir_type *restype = get_ir_type(return_type);
416 set_method_res_type(irtype, 0, restype);
419 function_parameter_t *parameter = function_type->parameters;
421 for ( ; parameter != NULL; parameter = parameter->next) {
422 type_t *type = get_parameter_type(parameter->type);
423 ir_type *p_irtype = get_ir_type(type);
424 set_method_param_type(irtype, n, p_irtype);
428 if (function_type->variadic || function_type->unspecified_parameters) {
429 set_method_variadicity(irtype, variadicity_variadic);
432 unsigned cc = get_method_calling_convention(irtype);
433 switch (function_type->calling_convention) {
434 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
437 set_method_calling_convention(irtype, SET_CDECL(cc));
441 if (function_type->variadic || function_type->unspecified_parameters)
444 /* only non-variadic function can use stdcall, else use cdecl */
445 set_method_calling_convention(irtype, SET_STDCALL(cc));
449 if (function_type->variadic || function_type->unspecified_parameters)
451 /* only non-variadic function can use fastcall, else use cdecl */
452 set_method_calling_convention(irtype, SET_FASTCALL(cc));
456 /* Hmm, leave default, not accepted by the parser yet. */
463 static ir_type *create_pointer_type(pointer_type_t *type)
465 type_t *points_to = type->points_to;
466 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
467 ir_type *ir_type = new_type_pointer(id_unique("pointer.%u"),
468 ir_points_to, mode_P_data);
473 static ir_type *create_reference_type(reference_type_t *type)
475 type_t *refers_to = type->refers_to;
476 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
477 ir_type *ir_type = new_type_pointer(id_unique("reference.%u"),
478 ir_refers_to, mode_P_data);
483 static ir_type *create_array_type(array_type_t *type)
485 type_t *element_type = type->element_type;
486 ir_type *ir_element_type = get_ir_type(element_type);
488 ident *id = id_unique("array.%u");
489 ir_type *ir_type = new_type_array(id, 1, ir_element_type);
491 const int align = get_type_alignment_bytes(ir_element_type);
492 set_type_alignment_bytes(ir_type, align);
494 if (type->size_constant) {
495 int n_elements = type->size;
497 set_array_bounds_int(ir_type, 0, 0, n_elements);
499 size_t elemsize = get_type_size_bytes(ir_element_type);
500 if (elemsize % align > 0) {
501 elemsize += align - (elemsize % align);
503 set_type_size_bytes(ir_type, n_elements * elemsize);
505 set_array_lower_bound_int(ir_type, 0, 0);
507 set_type_state(ir_type, layout_fixed);
513 * Return the signed integer type of size bits.
515 * @param size the size
517 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
520 static ir_mode *s_modes[64 + 1] = {NULL, };
524 if (size <= 0 || size > 64)
527 mode = s_modes[size];
531 snprintf(name, sizeof(name), "bf_I%u", size);
532 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
533 size <= 32 ? 32 : size );
534 s_modes[size] = mode;
538 snprintf(name, sizeof(name), "I%u", size);
539 ident *id = new_id_from_str(name);
540 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
541 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
542 set_primitive_base_type(res, base_tp);
548 * Return the unsigned integer type of size bits.
550 * @param size the size
552 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
555 static ir_mode *u_modes[64 + 1] = {NULL, };
559 if (size <= 0 || size > 64)
562 mode = u_modes[size];
566 snprintf(name, sizeof(name), "bf_U%u", size);
567 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
568 size <= 32 ? 32 : size );
569 u_modes[size] = mode;
574 snprintf(name, sizeof(name), "U%u", size);
575 ident *id = new_id_from_str(name);
576 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
577 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
578 set_primitive_base_type(res, base_tp);
583 static ir_type *create_bitfield_type(bitfield_type_t *const type)
585 type_t *base = skip_typeref(type->base_type);
586 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
587 ir_type *irbase = get_ir_type(base);
589 unsigned size = type->bit_size;
591 assert(!is_type_float(base));
592 if (is_type_signed(base)) {
593 return get_signed_int_type_for_bit_size(irbase, size);
595 return get_unsigned_int_type_for_bit_size(irbase, size);
599 #define INVALID_TYPE ((ir_type_ptr)-1)
602 COMPOUND_IS_STRUCT = false,
603 COMPOUND_IS_UNION = true
607 * Construct firm type from ast struct type.
609 * As anonymous inner structs get flattened to a single firm type, we might get
610 * irtype, outer_offset and out_align passed (they represent the position of
611 * the anonymous inner struct inside the resulting firm struct)
613 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
614 size_t *outer_offset, size_t *outer_align,
615 bool incomplete, bool is_union)
617 compound_t *compound = type->compound;
619 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
620 return compound->irtype;
623 size_t align_all = 1;
625 size_t bit_offset = 0;
628 if (irtype == NULL) {
629 symbol_t *symbol = compound->base.symbol;
631 if (symbol != NULL) {
632 id = new_id_from_str(symbol->string);
635 id = id_unique("__anonymous_union.%u");
637 id = id_unique("__anonymous_struct.%u");
640 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
643 irtype = new_d_type_union(id, dbgi);
645 irtype = new_d_type_struct(id, dbgi);
648 compound->irtype_complete = false;
649 compound->irtype = irtype;
651 offset = *outer_offset;
652 align_all = *outer_align;
658 compound->irtype_complete = true;
660 entity_t *entry = compound->members.entities;
661 for ( ; entry != NULL; entry = entry->base.next) {
662 if (entry->kind != ENTITY_COMPOUND_MEMBER)
665 size_t prev_offset = offset;
667 symbol_t *symbol = entry->base.symbol;
668 type_t *entry_type = skip_typeref(entry->declaration.type);
670 = get_aligned_type(entry_type, entry->compound_member.alignment);
671 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
674 if (symbol != NULL) {
675 ident = new_id_from_str(symbol->string);
677 if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
678 create_compound_type(&entry_type->compound, irtype, &offset,
679 &align_all, false, COMPOUND_IS_STRUCT);
680 goto finished_member;
681 } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
682 create_compound_type(&entry_type->compound, irtype, &offset,
683 &align_all, false, COMPOUND_IS_UNION);
684 goto finished_member;
686 assert(entry_type->kind == TYPE_BITFIELD);
688 ident = id_unique("anon.%u");
691 ir_type *base_irtype;
692 if (entry_type->kind == TYPE_BITFIELD) {
693 base_irtype = get_ir_type(entry_type->bitfield.base_type);
695 base_irtype = get_ir_type(entry_type);
698 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
699 size_t misalign = offset % entry_alignment;
701 ir_type *entry_irtype = get_ir_type(entry_type);
702 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
705 size_t bits_remainder;
706 if (entry_type->kind == TYPE_BITFIELD) {
707 size_t size_bits = entry_type->bitfield.bit_size;
708 size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
710 if (size_bits > rest_size_bits) {
711 /* start a new bucket */
712 offset += entry_alignment - misalign;
718 /* put into current bucket */
719 base = offset - misalign;
720 bits_remainder = misalign * 8 + bit_offset;
723 offset += size_bits / 8;
724 bit_offset = bit_offset + (size_bits % 8);
726 size_t entry_size = get_type_size_bytes(base_irtype);
727 if (misalign > 0 || bit_offset > 0)
728 offset += entry_alignment - misalign;
732 offset += entry_size;
736 if (entry_alignment > align_all) {
737 if (entry_alignment % align_all != 0) {
738 panic("uneven alignments not supported yet");
740 align_all = entry_alignment;
743 set_entity_offset(entity, base);
744 set_entity_offset_bits_remainder(entity,
745 (unsigned char) bits_remainder);
746 //add_struct_member(irtype, entity);
747 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
748 assert(entry->compound_member.entity == NULL);
749 entry->compound_member.entity = entity;
753 size_t entry_size = offset - prev_offset;
754 if (entry_size > size) {
766 size_t misalign = offset % align_all;
767 if (misalign > 0 || bit_offset > 0) {
768 size += align_all - misalign;
771 if (outer_offset != NULL) {
773 *outer_offset = offset;
775 *outer_offset += size;
778 if (align_all > *outer_align) {
779 if (align_all % *outer_align != 0) {
780 panic("uneven alignments not supported yet");
782 *outer_align = align_all;
785 set_type_alignment_bytes(irtype, align_all);
786 set_type_size_bytes(irtype, size);
787 set_type_state(irtype, layout_fixed);
793 static ir_type *create_enum_type(enum_type_t *const type)
795 type->base.firm_type = ir_type_int;
797 ir_mode *const mode = mode_int;
798 tarval *const one = get_mode_one(mode);
799 tarval * tv_next = get_tarval_null(mode);
801 bool constant_folding_old = constant_folding;
802 constant_folding = true;
804 enum_t *enume = type->enume;
805 entity_t *entry = enume->base.next;
806 for (; entry != NULL; entry = entry->base.next) {
807 if (entry->kind != ENTITY_ENUM_VALUE)
810 expression_t *const init = entry->enum_value.value;
812 ir_node *const cnst = expression_to_firm(init);
813 if (!is_Const(cnst)) {
814 panic("couldn't fold constant");
816 tv_next = get_Const_tarval(cnst);
818 entry->enum_value.tv = tv_next;
819 tv_next = tarval_add(tv_next, one);
822 constant_folding = constant_folding_old;
824 return create_atomic_type(type->akind, type->base.alignment);
827 static ir_type *get_ir_type_incomplete(type_t *type)
829 assert(type != NULL);
830 type = skip_typeref(type);
832 if (type->base.firm_type != NULL) {
833 assert(type->base.firm_type != INVALID_TYPE);
834 return type->base.firm_type;
837 switch (type->kind) {
838 case TYPE_COMPOUND_STRUCT:
839 return create_compound_type(&type->compound, NULL, NULL, NULL,
840 true, COMPOUND_IS_STRUCT);
841 case TYPE_COMPOUND_UNION:
842 return create_compound_type(&type->compound, NULL, NULL, NULL,
843 true, COMPOUND_IS_UNION);
845 return get_ir_type(type);
849 ir_type *get_ir_type(type_t *type)
851 assert(type != NULL);
853 type = skip_typeref(type);
855 if (type->base.firm_type != NULL) {
856 assert(type->base.firm_type != INVALID_TYPE);
857 return type->base.firm_type;
860 ir_type *firm_type = NULL;
861 switch (type->kind) {
863 /* Happens while constant folding, when there was an error */
864 return create_atomic_type(ATOMIC_TYPE_VOID, 0);
867 firm_type = create_atomic_type(type->atomic.akind,
868 type->base.alignment);
871 firm_type = create_complex_type(&type->complex);
874 firm_type = create_imaginary_type(&type->imaginary);
877 firm_type = create_method_type(&type->function);
880 firm_type = create_pointer_type(&type->pointer);
883 firm_type = create_reference_type(&type->reference);
886 firm_type = create_array_type(&type->array);
888 case TYPE_COMPOUND_STRUCT:
889 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
890 false, COMPOUND_IS_STRUCT);
892 case TYPE_COMPOUND_UNION:
893 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
894 false, COMPOUND_IS_UNION);
897 firm_type = create_enum_type(&type->enumt);
900 firm_type = get_ir_type(type->builtin.real_type);
903 firm_type = create_bitfield_type(&type->bitfield);
911 if (firm_type == NULL)
912 panic("unknown type found");
914 type->base.firm_type = firm_type;
918 static ir_mode *get_ir_mode_storage(type_t *type)
920 ir_type *irtype = get_ir_type(type);
922 /* firm doesn't report a mode for arrays somehow... */
923 if (is_Array_type(irtype)) {
927 ir_mode *mode = get_type_mode(irtype);
928 assert(mode != NULL);
932 static ir_mode *get_ir_mode_arithmetic(type_t *type)
934 ir_mode *mode = get_ir_mode_storage(type);
935 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
936 return mode_float_arithmetic;
942 /** Names of the runtime functions. */
943 static const struct {
944 int id; /**< the rts id */
945 int n_res; /**< number of return values */
946 const char *name; /**< the name of the rts function */
947 int n_params; /**< number of parameters */
948 unsigned flags; /**< language flags */
950 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
951 { rts_abort, 0, "abort", 0, _C89 },
952 { rts_alloca, 1, "alloca", 1, _ALL },
953 { rts_abs, 1, "abs", 1, _C89 },
954 { rts_labs, 1, "labs", 1, _C89 },
955 { rts_llabs, 1, "llabs", 1, _C99 },
956 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
958 { rts_fabs, 1, "fabs", 1, _C89 },
959 { rts_sqrt, 1, "sqrt", 1, _C89 },
960 { rts_cbrt, 1, "cbrt", 1, _C99 },
961 { rts_exp, 1, "exp", 1, _C89 },
962 { rts_exp2, 1, "exp2", 1, _C89 },
963 { rts_exp10, 1, "exp10", 1, _GNUC },
964 { rts_log, 1, "log", 1, _C89 },
965 { rts_log2, 1, "log2", 1, _C89 },
966 { rts_log10, 1, "log10", 1, _C89 },
967 { rts_pow, 1, "pow", 2, _C89 },
968 { rts_sin, 1, "sin", 1, _C89 },
969 { rts_cos, 1, "cos", 1, _C89 },
970 { rts_tan, 1, "tan", 1, _C89 },
971 { rts_asin, 1, "asin", 1, _C89 },
972 { rts_acos, 1, "acos", 1, _C89 },
973 { rts_atan, 1, "atan", 1, _C89 },
974 { rts_sinh, 1, "sinh", 1, _C89 },
975 { rts_cosh, 1, "cosh", 1, _C89 },
976 { rts_tanh, 1, "tanh", 1, _C89 },
978 { rts_fabsf, 1, "fabsf", 1, _C99 },
979 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
980 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
981 { rts_expf, 1, "expf", 1, _C99 },
982 { rts_exp2f, 1, "exp2f", 1, _C99 },
983 { rts_exp10f, 1, "exp10f", 1, _GNUC },
984 { rts_logf, 1, "logf", 1, _C99 },
985 { rts_log2f, 1, "log2f", 1, _C99 },
986 { rts_log10f, 1, "log10f", 1, _C99 },
987 { rts_powf, 1, "powf", 2, _C99 },
988 { rts_sinf, 1, "sinf", 1, _C99 },
989 { rts_cosf, 1, "cosf", 1, _C99 },
990 { rts_tanf, 1, "tanf", 1, _C99 },
991 { rts_asinf, 1, "asinf", 1, _C99 },
992 { rts_acosf, 1, "acosf", 1, _C99 },
993 { rts_atanf, 1, "atanf", 1, _C99 },
994 { rts_sinhf, 1, "sinhf", 1, _C99 },
995 { rts_coshf, 1, "coshf", 1, _C99 },
996 { rts_tanhf, 1, "tanhf", 1, _C99 },
998 { rts_fabsl, 1, "fabsl", 1, _C99 },
999 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
1000 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
1001 { rts_expl, 1, "expl", 1, _C99 },
1002 { rts_exp2l, 1, "exp2l", 1, _C99 },
1003 { rts_exp10l, 1, "exp10l", 1, _GNUC },
1004 { rts_logl, 1, "logl", 1, _C99 },
1005 { rts_log2l, 1, "log2l", 1, _C99 },
1006 { rts_log10l, 1, "log10l", 1, _C99 },
1007 { rts_powl, 1, "powl", 2, _C99 },
1008 { rts_sinl, 1, "sinl", 1, _C99 },
1009 { rts_cosl, 1, "cosl", 1, _C99 },
1010 { rts_tanl, 1, "tanl", 1, _C99 },
1011 { rts_asinl, 1, "asinl", 1, _C99 },
1012 { rts_acosl, 1, "acosl", 1, _C99 },
1013 { rts_atanl, 1, "atanl", 1, _C99 },
1014 { rts_sinhl, 1, "sinhl", 1, _C99 },
1015 { rts_coshl, 1, "coshl", 1, _C99 },
1016 { rts_tanhl, 1, "tanhl", 1, _C99 },
1018 { rts_memcpy, 1, "memcpy", 3, _C89 }, /* HMM, man say its C99 */
1019 { rts_memset, 1, "memset", 3, _C89 }, /* HMM, man say its C99 */
1020 { rts_strcmp, 1, "strcmp", 2, _C89 },
1021 { rts_strncmp, 1, "strncmp", 3, _C89 }
1024 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
1026 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
1029 * Handle GNU attributes for entities
1031 * @param ent the entity
1032 * @param decl the routine declaration
1034 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
1036 assert(is_declaration(entity));
1037 decl_modifiers_t modifiers = entity->declaration.modifiers;
1038 if (modifiers & DM_PURE) {
1039 /* TRUE if the declaration includes the GNU
1040 __attribute__((pure)) specifier. */
1041 set_entity_additional_property(irentity, mtp_property_pure);
1043 if (modifiers & DM_CONST) {
1044 set_entity_additional_property(irentity, mtp_property_const);
1045 have_const_functions = true;
1047 if (modifiers & DM_USED) {
1048 /* TRUE if the declaration includes the GNU
1049 __attribute__((used)) specifier. */
1050 set_entity_stickyness(irentity, stickyness_sticky);
1054 static bool is_main(entity_t *entity)
1056 static symbol_t *sym_main = NULL;
1057 if (sym_main == NULL) {
1058 sym_main = symbol_table_insert("main");
1061 if (entity->base.symbol != sym_main)
1063 /* must be in outermost scope */
1064 if (entity->base.parent_scope != ¤t_translation_unit->scope)
1071 * Creates an entity representing a function.
1073 * @param declaration the function declaration
1075 static ir_entity *get_function_entity(entity_t *entity)
1077 assert(entity->kind == ENTITY_FUNCTION);
1078 if (entity->function.entity != NULL) {
1079 return entity->function.entity;
1082 if (is_main(entity)) {
1083 /* force main to C linkage */
1084 type_t *type = entity->declaration.type;
1085 assert(is_type_function(type));
1086 if (type->function.linkage != LINKAGE_C) {
1087 type_t *new_type = duplicate_type(type);
1088 new_type->function.linkage = LINKAGE_C;
1089 type = identify_new_type(new_type);
1090 entity->declaration.type = type;
1094 symbol_t *symbol = entity->base.symbol;
1095 ident *id = new_id_from_str(symbol->string);
1097 ir_type *global_type = get_glob_type();
1098 ir_type *ir_type_method = get_ir_type(entity->declaration.type);
1099 bool const has_body = entity->function.statement != NULL;
1101 /* already an entity defined? */
1102 ir_entity *irentity = entitymap_get(&entitymap, symbol);
1103 if (irentity != NULL) {
1104 if (get_entity_visibility(irentity) == visibility_external_allocated
1106 set_entity_visibility(irentity, visibility_external_visible);
1108 goto entity_created;
1111 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1112 irentity = new_d_entity(global_type, id, ir_type_method, dbgi);
1113 set_entity_ld_ident(irentity, create_ld_ident(entity));
1115 handle_gnu_attributes_ent(irentity, entity);
1117 /* static inline => local
1118 * extern inline => local
1119 * inline without definition => local
1120 * inline with definition => external_visible */
1121 storage_class_tag_t const storage_class
1122 = (storage_class_tag_t) entity->declaration.storage_class;
1123 bool const is_inline = entity->function.is_inline;
1124 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1125 set_entity_visibility(irentity, visibility_external_visible);
1126 } else if (storage_class == STORAGE_CLASS_STATIC ||
1127 (is_inline && has_body)) {
1129 /* this entity was declared, but is defined nowhere */
1130 set_entity_peculiarity(irentity, peculiarity_description);
1132 set_entity_visibility(irentity, visibility_local);
1133 } else if (has_body) {
1134 set_entity_visibility(irentity, visibility_external_visible);
1136 set_entity_visibility(irentity, visibility_external_allocated);
1138 set_entity_allocation(irentity, allocation_static);
1140 /* We should check for file scope here, but as long as we compile C only
1141 this is not needed. */
1142 if (! firm_opt.freestanding) {
1143 /* check for a known runtime function */
1144 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1145 if (id != rts_idents[i])
1148 /* ignore those rts functions not necessary needed for current mode */
1149 if ((c_mode & rts_data[i].flags) == 0)
1151 assert(rts_entities[rts_data[i].id] == NULL);
1152 rts_entities[rts_data[i].id] = irentity;
1156 entitymap_insert(&entitymap, symbol, irentity);
1159 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1160 entity->function.entity = irentity;
1165 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1167 ir_mode *value_mode = get_irn_mode(value);
1169 if (value_mode == dest_mode || is_Bad(value))
1172 if (dest_mode == mode_b) {
1173 ir_node *zero = new_Const(get_mode_null(value_mode));
1174 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
1175 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1179 return new_d_Conv(dbgi, value, dest_mode);
1183 * Creates a Const node representing a constant.
1185 static ir_node *const_to_firm(const const_expression_t *cnst)
1187 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1188 type_t *type = skip_typeref(cnst->base.type);
1189 ir_mode *mode = get_ir_mode_storage(type);
1194 if (mode_is_float(mode)) {
1195 tv = new_tarval_from_double(cnst->v.float_value, mode);
1197 if (mode_is_signed(mode)) {
1198 len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1200 len = snprintf(buf, sizeof(buf), "%llu",
1201 (unsigned long long) cnst->v.int_value);
1203 tv = new_tarval_from_str(buf, len, mode);
1206 ir_node *res = new_d_Const(dbgi, tv);
1207 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1208 return create_conv(dbgi, res, mode_arith);
1212 * Creates a Const node representing a character constant.
1214 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1216 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1217 ir_mode *mode = get_ir_mode_arithmetic(cnst->base.type);
1220 size_t const size = cnst->v.character.size;
1221 if (size == 1 && char_is_signed) {
1222 v = (signed char)cnst->v.character.begin[0];
1225 for (size_t i = 0; i < size; ++i) {
1226 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1230 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1231 tarval *tv = new_tarval_from_str(buf, len, mode);
1233 return new_d_Const(dbgi, tv);
1237 * Creates a Const node representing a wide character constant.
1239 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1241 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1242 ir_mode *mode = get_ir_mode_arithmetic(cnst->base.type);
1244 long long int v = cnst->v.wide_character.begin[0];
1247 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1248 tarval *tv = new_tarval_from_str(buf, len, mode);
1250 return new_d_Const(dbgi, tv);
1254 * Creates a SymConst for a given entity.
1256 * @param dbgi debug info
1257 * @param mode the (reference) mode for the SymConst
1258 * @param entity the entity
1260 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1263 assert(entity != NULL);
1264 union symconst_symbol sym;
1265 sym.entity_p = entity;
1266 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1270 * Creates a SymConst node representing a string constant.
1272 * @param src_pos the source position of the string constant
1273 * @param id_prefix a prefix for the name of the generated string constant
1274 * @param value the value of the string constant
1276 static ir_node *string_to_firm(const source_position_t *const src_pos,
1277 const char *const id_prefix,
1278 const string_t *const value)
1280 ir_type *const global_type = get_glob_type();
1281 dbg_info *const dbgi = get_dbg_info(src_pos);
1282 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1283 ir_type_const_char, dbgi);
1285 ident *const id = id_unique(id_prefix);
1286 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1287 set_entity_ld_ident(entity, id);
1288 set_entity_variability(entity, variability_constant);
1289 set_entity_allocation(entity, allocation_static);
1291 ir_type *const elem_type = ir_type_const_char;
1292 ir_mode *const mode = get_type_mode(elem_type);
1294 const char* const string = value->begin;
1295 const size_t slen = value->size;
1297 set_array_lower_bound_int(type, 0, 0);
1298 set_array_upper_bound_int(type, 0, slen);
1299 set_type_size_bytes(type, slen);
1300 set_type_state(type, layout_fixed);
1302 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1303 for (size_t i = 0; i < slen; ++i) {
1304 tvs[i] = new_tarval_from_long(string[i], mode);
1307 set_array_entity_values(entity, tvs, slen);
1310 return create_symconst(dbgi, mode_P_data, entity);
1314 * Creates a SymConst node representing a string literal.
1316 * @param literal the string literal
1318 static ir_node *string_literal_to_firm(
1319 const string_literal_expression_t* literal)
1321 return string_to_firm(&literal->base.source_position, "Lstr.%u",
1326 * Creates a SymConst node representing a wide string literal.
1328 * @param literal the wide string literal
1330 static ir_node *wide_string_literal_to_firm(
1331 const wide_string_literal_expression_t* const literal)
1333 ir_type *const global_type = get_glob_type();
1334 ir_type *const elem_type = ir_type_wchar_t;
1335 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1336 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1339 ident *const id = id_unique("Lstr.%u");
1340 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1341 set_entity_ld_ident(entity, id);
1342 set_entity_variability(entity, variability_constant);
1343 set_entity_allocation(entity, allocation_static);
1345 ir_mode *const mode = get_type_mode(elem_type);
1347 const wchar_rep_t *const string = literal->value.begin;
1348 const size_t slen = literal->value.size;
1350 set_array_lower_bound_int(type, 0, 0);
1351 set_array_upper_bound_int(type, 0, slen);
1352 set_type_size_bytes(type, slen);
1353 set_type_state(type, layout_fixed);
1355 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1356 for (size_t i = 0; i < slen; ++i) {
1357 tvs[i] = new_tarval_from_long(string[i], mode);
1360 set_array_entity_values(entity, tvs, slen);
1363 return create_symconst(dbgi, mode_P_data, entity);
1366 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1367 ir_node *const addr)
1369 ir_type *irtype = get_ir_type(type);
1370 if (is_compound_type(irtype)
1371 || is_Method_type(irtype)
1372 || is_Array_type(irtype)) {
1376 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1377 ? cons_volatile : 0;
1378 ir_mode *const mode = get_type_mode(irtype);
1379 ir_node *const memory = get_store();
1380 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1381 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1382 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1384 set_store(load_mem);
1386 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1387 return create_conv(dbgi, load_res, mode_arithmetic);
1391 * Creates a strict Conv if neccessary.
1393 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1395 ir_mode *mode = get_irn_mode(node);
1397 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1399 if (!mode_is_float(mode))
1402 /* check if there is already a Conv */
1403 if (is_Conv(node)) {
1404 /* convert it into a strict Conv */
1405 set_Conv_strict(node, 1);
1409 /* otherwise create a new one */
1410 return new_d_strictConv(dbgi, node, mode);
1413 static ir_node *get_global_var_address(dbg_info *const dbgi,
1414 const entity_t *const entity)
1416 assert(entity->kind == ENTITY_VARIABLE);
1417 assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1419 ir_entity *const irentity = entity->variable.v.entity;
1420 if (entity->variable.thread_local) {
1421 ir_node *const no_mem = new_NoMem();
1422 ir_node *const tls = get_irg_tls(current_ir_graph);
1423 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1425 return create_symconst(dbgi, mode_P_data, irentity);
1430 * Returns the correct base address depending on whether it is a parameter or a
1431 * normal local variable.
1433 static ir_node *get_local_frame(ir_entity *const ent)
1435 ir_graph *const irg = current_ir_graph;
1436 const ir_type *const owner = get_entity_owner(ent);
1437 if (owner == get_irg_frame_type(irg)) {
1438 return get_irg_frame(irg);
1440 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1441 return get_irg_value_param_base(irg);
1446 * Keep all memory edges of the given block.
1448 static void keep_all_memory(ir_node *block) {
1449 ir_node *old = get_cur_block();
1451 set_cur_block(block);
1452 keep_alive(get_store());
1453 /* TODO: keep all memory edges from restricted pointers */
1457 static ir_node *reference_expression_enum_value_to_firm(
1458 const reference_expression_t *ref)
1460 entity_t *entity = ref->entity;
1461 type_t *type = skip_typeref(entity->enum_value.enum_type);
1462 /* make sure the type is constructed */
1463 (void) get_ir_type(type);
1465 return new_Const(entity->enum_value.tv);
1468 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1470 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1471 entity_t *entity = ref->entity;
1472 assert(is_declaration(entity));
1473 type_t *type = skip_typeref(entity->declaration.type);
1475 /* make sure the type is constructed */
1476 (void) get_ir_type(type);
1478 switch ((declaration_kind_t) entity->declaration.kind) {
1479 case DECLARATION_KIND_UNKNOWN:
1482 case DECLARATION_KIND_LOCAL_VARIABLE: {
1483 ir_mode *const mode = get_ir_mode_storage(type);
1484 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1485 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1487 case DECLARATION_KIND_PARAMETER: {
1488 ir_mode *const mode = get_ir_mode_storage(type);
1489 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1490 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1492 case DECLARATION_KIND_FUNCTION: {
1493 ir_mode *const mode = get_ir_mode_storage(type);
1494 return create_symconst(dbgi, mode, entity->function.entity);
1496 case DECLARATION_KIND_INNER_FUNCTION: {
1497 ir_mode *const mode = get_ir_mode_storage(type);
1498 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1499 /* inner function not using the closure */
1500 return create_symconst(dbgi, mode, entity->function.entity);
1502 /* TODO: need trampoline here */
1503 panic("Trampoline code not implemented");
1504 return create_symconst(dbgi, mode, entity->function.entity);
1507 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1508 ir_node *const addr = get_global_var_address(dbgi, entity);
1509 return deref_address(dbgi, entity->declaration.type, addr);
1512 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1513 ir_entity *irentity = entity->variable.v.entity;
1514 ir_node *frame = get_local_frame(irentity);
1515 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1516 return deref_address(dbgi, entity->declaration.type, sel);
1518 case DECLARATION_KIND_PARAMETER_ENTITY: {
1519 ir_entity *irentity = entity->parameter.v.entity;
1520 ir_node *frame = get_local_frame(irentity);
1521 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1522 return deref_address(dbgi, entity->declaration.type, sel);
1525 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1526 return entity->variable.v.vla_base;
1528 case DECLARATION_KIND_COMPOUND_MEMBER:
1529 panic("not implemented reference type");
1532 panic("reference to declaration with unknown type found");
1535 static ir_node *reference_addr(const reference_expression_t *ref)
1537 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1538 entity_t *entity = ref->entity;
1539 assert(is_declaration(entity));
1541 switch((declaration_kind_t) entity->declaration.kind) {
1542 case DECLARATION_KIND_UNKNOWN:
1544 case DECLARATION_KIND_PARAMETER:
1545 case DECLARATION_KIND_LOCAL_VARIABLE:
1546 /* you can store to a local variable (so we don't panic but return NULL
1547 * as an indicator for no real address) */
1549 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1550 ir_node *const addr = get_global_var_address(dbgi, entity);
1553 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1554 ir_entity *irentity = entity->variable.v.entity;
1555 ir_node *frame = get_local_frame(irentity);
1556 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1560 case DECLARATION_KIND_PARAMETER_ENTITY: {
1561 ir_entity *irentity = entity->parameter.v.entity;
1562 ir_node *frame = get_local_frame(irentity);
1563 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1568 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1569 return entity->variable.v.vla_base;
1571 case DECLARATION_KIND_FUNCTION: {
1572 type_t *const type = skip_typeref(entity->declaration.type);
1573 ir_mode *const mode = get_ir_mode_storage(type);
1574 return create_symconst(dbgi, mode, entity->function.entity);
1577 case DECLARATION_KIND_INNER_FUNCTION:
1578 case DECLARATION_KIND_COMPOUND_MEMBER:
1579 panic("not implemented reference type");
1582 panic("reference to declaration with unknown type found");
1586 * Transform calls to builtin functions.
1588 static ir_node *process_builtin_call(const call_expression_t *call)
1590 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1592 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1593 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1595 type_t *type = skip_typeref(builtin->base.type);
1596 assert(is_type_pointer(type));
1598 type_t *function_type = skip_typeref(type->pointer.points_to);
1599 symbol_t *symbol = builtin->symbol;
1601 switch(symbol->ID) {
1602 case T___builtin_alloca: {
1603 if (call->arguments == NULL || call->arguments->next != NULL) {
1604 panic("invalid number of parameters on __builtin_alloca");
1606 expression_t *argument = call->arguments->expression;
1607 ir_node *size = expression_to_firm(argument);
1609 ir_node *store = get_store();
1610 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1612 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1614 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1619 case T___builtin_huge_val:
1620 case T___builtin_inf:
1621 case T___builtin_inff:
1622 case T___builtin_infl: {
1623 type_t *type = function_type->function.return_type;
1624 ir_mode *mode = get_ir_mode_arithmetic(type);
1625 tarval *tv = get_mode_infinite(mode);
1626 ir_node *res = new_d_Const(dbgi, tv);
1629 case T___builtin_nan:
1630 case T___builtin_nanf:
1631 case T___builtin_nanl: {
1632 /* Ignore string for now... */
1633 assert(is_type_function(function_type));
1634 type_t *type = function_type->function.return_type;
1635 ir_mode *mode = get_ir_mode_arithmetic(type);
1636 tarval *tv = get_mode_NAN(mode);
1637 ir_node *res = new_d_Const(dbgi, tv);
1640 case T___builtin_expect: {
1641 expression_t *argument = call->arguments->expression;
1642 return _expression_to_firm(argument);
1644 case T___builtin_va_end:
1645 /* evaluate the argument of va_end for its side effects */
1646 _expression_to_firm(call->arguments->expression);
1649 panic("unsupported builtin found");
1654 * Transform a call expression.
1655 * Handles some special cases, like alloca() calls, which must be resolved
1656 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1657 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1660 static ir_node *call_expression_to_firm(const call_expression_t *call)
1662 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1663 assert(get_cur_block() != NULL);
1665 expression_t *function = call->function;
1666 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1667 return process_builtin_call(call);
1669 if (function->kind == EXPR_REFERENCE) {
1670 const reference_expression_t *ref = &function->reference;
1671 entity_t *entity = ref->entity;
1673 if (entity->kind == ENTITY_FUNCTION
1674 && entity->function.entity == rts_entities[rts_alloca]) {
1675 /* handle alloca() call */
1676 expression_t *argument = call->arguments->expression;
1677 ir_node *size = expression_to_firm(argument);
1678 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
1680 size = create_conv(dbgi, size, mode);
1682 ir_node *store = get_store();
1683 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1684 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1686 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1688 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1693 ir_node *callee = expression_to_firm(function);
1695 type_t *type = skip_typeref(function->base.type);
1696 assert(is_type_pointer(type));
1697 pointer_type_t *pointer_type = &type->pointer;
1698 type_t *points_to = skip_typeref(pointer_type->points_to);
1699 assert(is_type_function(points_to));
1700 function_type_t *function_type = &points_to->function;
1702 int n_parameters = 0;
1703 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1704 ir_type *new_method_type = NULL;
1705 if (function_type->variadic || function_type->unspecified_parameters) {
1706 const call_argument_t *argument = call->arguments;
1707 for ( ; argument != NULL; argument = argument->next) {
1711 /* we need to construct a new method type matching the call
1713 int n_res = get_method_n_ress(ir_method_type);
1714 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1715 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1716 n_parameters, n_res, dbgi);
1717 set_method_calling_convention(new_method_type,
1718 get_method_calling_convention(ir_method_type));
1719 set_method_additional_properties(new_method_type,
1720 get_method_additional_properties(ir_method_type));
1721 set_method_variadicity(new_method_type,
1722 get_method_variadicity(ir_method_type));
1724 for (int i = 0; i < n_res; ++i) {
1725 set_method_res_type(new_method_type, i,
1726 get_method_res_type(ir_method_type, i));
1728 argument = call->arguments;
1729 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1730 expression_t *expression = argument->expression;
1731 ir_type *irtype = get_ir_type(expression->base.type);
1732 set_method_param_type(new_method_type, i, irtype);
1734 ir_method_type = new_method_type;
1736 n_parameters = get_method_n_params(ir_method_type);
1739 ir_node *in[n_parameters];
1741 const call_argument_t *argument = call->arguments;
1742 for (int n = 0; n < n_parameters; ++n) {
1743 expression_t *expression = argument->expression;
1744 ir_node *arg_node = expression_to_firm(expression);
1746 type_t *type = skip_typeref(expression->base.type);
1747 if (!is_type_compound(type)) {
1748 ir_mode *mode = get_ir_mode_storage(expression->base.type);
1749 arg_node = create_conv(dbgi, arg_node, mode);
1750 arg_node = do_strict_conv(dbgi, arg_node);
1755 argument = argument->next;
1758 ir_node *store = get_store();
1759 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1761 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1764 type_t *return_type = skip_typeref(function_type->return_type);
1765 ir_node *result = NULL;
1767 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1768 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1770 if (is_type_scalar(return_type)) {
1771 ir_mode *mode = get_ir_mode_storage(return_type);
1772 result = new_d_Proj(dbgi, resproj, mode, 0);
1773 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1774 result = create_conv(NULL, result, mode_arith);
1776 ir_mode *mode = mode_P_data;
1777 result = new_d_Proj(dbgi, resproj, mode, 0);
1781 if (function->kind == EXPR_REFERENCE &&
1782 function->reference.entity->declaration.modifiers & DM_NORETURN) {
1783 /* A dead end: Keep the Call and the Block. Also place all further
1784 * nodes into a new and unreachable block. */
1786 keep_alive(get_cur_block());
1793 static void statement_to_firm(statement_t *statement);
1794 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1796 static ir_node *expression_to_addr(const expression_t *expression);
1797 static ir_node *create_condition_evaluation(const expression_t *expression,
1798 ir_node *true_block,
1799 ir_node *false_block);
1801 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1804 if (!is_type_compound(type)) {
1805 ir_mode *mode = get_ir_mode_storage(type);
1806 value = create_conv(dbgi, value, mode);
1807 value = do_strict_conv(dbgi, value);
1810 ir_node *memory = get_store();
1812 if (is_type_scalar(type)) {
1813 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1814 ? cons_volatile : 0;
1815 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1816 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1817 set_store(store_mem);
1819 ir_type *irtype = get_ir_type(type);
1820 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1821 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1822 set_store(copyb_mem);
1826 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1828 tarval *all_one = get_mode_all_one(mode);
1829 int mode_size = get_mode_size_bits(mode);
1831 assert(offset >= 0);
1833 assert(offset + size <= mode_size);
1834 if (size == mode_size) {
1838 long shiftr = get_mode_size_bits(mode) - size;
1839 long shiftl = offset;
1840 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1841 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1842 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1843 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1848 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1849 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1851 ir_type *entity_type = get_entity_type(entity);
1852 ir_type *base_type = get_primitive_base_type(entity_type);
1853 assert(base_type != NULL);
1854 ir_mode *mode = get_type_mode(base_type);
1856 value = create_conv(dbgi, value, mode);
1858 /* kill upper bits of value and shift to right position */
1859 int bitoffset = get_entity_offset_bits_remainder(entity);
1860 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1862 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1863 ir_node *mask_node = new_d_Const(dbgi, mask);
1864 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1865 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1866 ir_node *shiftcount = new_d_Const(dbgi, shiftl);
1867 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1869 /* load current value */
1870 ir_node *mem = get_store();
1871 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1872 set_volatile ? cons_volatile : 0);
1873 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1874 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1875 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1876 tarval *inv_mask = tarval_not(shift_mask);
1877 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1878 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1880 /* construct new value and store */
1881 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1882 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1883 set_volatile ? cons_volatile : 0);
1884 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1885 set_store(store_mem);
1887 return value_masked;
1890 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1893 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1894 type_t *type = expression->base.type;
1895 ir_mode *mode = get_ir_mode_storage(type);
1896 ir_node *mem = get_store();
1897 ir_node *load = new_d_Load(dbgi, mem, addr, mode, 0);
1898 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1899 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1901 load_res = create_conv(dbgi, load_res, mode_int);
1903 set_store(load_mem);
1905 /* kill upper bits */
1906 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1907 ir_entity *entity = expression->compound_entry->compound_member.entity;
1908 int bitoffset = get_entity_offset_bits_remainder(entity);
1909 ir_type *entity_type = get_entity_type(entity);
1910 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1911 long shift_bitsl = machine_size - bitoffset - bitsize;
1912 assert(shift_bitsl >= 0);
1913 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1914 ir_node *countl = new_d_Const(dbgi, tvl);
1915 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1917 long shift_bitsr = bitoffset + shift_bitsl;
1918 assert(shift_bitsr <= (long) machine_size);
1919 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1920 ir_node *countr = new_d_Const(dbgi, tvr);
1922 if (mode_is_signed(mode)) {
1923 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1925 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1928 return create_conv(dbgi, shiftr, mode);
1931 /* make sure the selected compound type is constructed */
1932 static void construct_select_compound(const select_expression_t *expression)
1934 type_t *type = skip_typeref(expression->compound->base.type);
1935 if (is_type_pointer(type)) {
1936 type = type->pointer.points_to;
1938 (void) get_ir_type(type);
1941 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1942 ir_node *value, ir_node *addr)
1944 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1945 type_t *type = skip_typeref(expression->base.type);
1947 if (!is_type_compound(type)) {
1948 ir_mode *mode = get_ir_mode_storage(type);
1949 value = create_conv(dbgi, value, mode);
1950 value = do_strict_conv(dbgi, value);
1953 if (expression->kind == EXPR_REFERENCE) {
1954 const reference_expression_t *ref = &expression->reference;
1956 entity_t *entity = ref->entity;
1957 assert(is_declaration(entity));
1958 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1959 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1960 set_value(entity->variable.v.value_number, value);
1962 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1963 set_value(entity->parameter.v.value_number, value);
1969 addr = expression_to_addr(expression);
1970 assert(addr != NULL);
1972 if (expression->kind == EXPR_SELECT) {
1973 const select_expression_t *select = &expression->select;
1975 construct_select_compound(select);
1977 entity_t *entity = select->compound_entry;
1978 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1979 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1980 ir_entity *irentity = entity->compound_member.entity;
1982 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1983 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
1989 assign_value(dbgi, addr, type, value);
1993 static void set_value_for_expression(const expression_t *expression,
1996 set_value_for_expression_addr(expression, value, NULL);
1999 static ir_node *get_value_from_lvalue(const expression_t *expression,
2002 if (expression->kind == EXPR_REFERENCE) {
2003 const reference_expression_t *ref = &expression->reference;
2005 entity_t *entity = ref->entity;
2006 assert(entity->kind == ENTITY_VARIABLE
2007 || entity->kind == ENTITY_PARAMETER);
2008 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2010 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2011 value_number = entity->variable.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));
2017 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2018 value_number = entity->parameter.v.value_number;
2019 assert(addr == NULL);
2020 type_t *type = skip_typeref(expression->base.type);
2021 ir_mode *mode = get_ir_mode_storage(type);
2022 ir_node *res = get_value(value_number, mode);
2023 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2027 assert(addr != NULL);
2028 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2031 if (expression->kind == EXPR_SELECT &&
2032 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2033 construct_select_compound(&expression->select);
2034 value = bitfield_extract_to_firm(&expression->select, addr);
2036 value = deref_address(dbgi, expression->base.type, addr);
2043 static ir_node *create_incdec(const unary_expression_t *expression)
2045 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2046 const expression_t *value_expr = expression->value;
2047 ir_node *addr = expression_to_addr(value_expr);
2048 ir_node *value = get_value_from_lvalue(value_expr, addr);
2050 type_t *type = skip_typeref(expression->base.type);
2051 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2054 if (is_type_pointer(type)) {
2055 pointer_type_t *pointer_type = &type->pointer;
2056 offset = get_type_size(pointer_type->points_to);
2058 assert(is_type_arithmetic(type));
2059 offset = new_Const(get_mode_one(mode));
2063 ir_node *store_value;
2064 switch(expression->base.kind) {
2065 case EXPR_UNARY_POSTFIX_INCREMENT:
2067 store_value = new_d_Add(dbgi, value, offset, mode);
2069 case EXPR_UNARY_POSTFIX_DECREMENT:
2071 store_value = new_d_Sub(dbgi, value, offset, mode);
2073 case EXPR_UNARY_PREFIX_INCREMENT:
2074 result = new_d_Add(dbgi, value, offset, mode);
2075 store_value = result;
2077 case EXPR_UNARY_PREFIX_DECREMENT:
2078 result = new_d_Sub(dbgi, value, offset, mode);
2079 store_value = result;
2082 panic("no incdec expr in create_incdec");
2085 set_value_for_expression_addr(value_expr, store_value, addr);
2090 static bool is_local_variable(expression_t *expression)
2092 if (expression->kind != EXPR_REFERENCE)
2094 reference_expression_t *ref_expr = &expression->reference;
2095 entity_t *entity = ref_expr->entity;
2096 if (entity->kind != ENTITY_VARIABLE)
2098 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2099 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2102 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2105 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2106 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2107 case EXPR_BINARY_NOTEQUAL:
2108 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2109 case EXPR_BINARY_ISLESS:
2110 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2111 case EXPR_BINARY_ISLESSEQUAL:
2112 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2113 case EXPR_BINARY_ISGREATER:
2114 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2115 case EXPR_BINARY_ISGREATEREQUAL:
2116 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2117 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2122 panic("trying to get pn_Cmp from non-comparison binexpr type");
2126 * Handle the assume optimizer hint: check if a Confirm
2127 * node can be created.
2129 * @param dbi debug info
2130 * @param expr the IL assume expression
2132 * we support here only some simple cases:
2137 static ir_node *handle_assume_compare(dbg_info *dbi,
2138 const binary_expression_t *expression)
2140 expression_t *op1 = expression->left;
2141 expression_t *op2 = expression->right;
2142 entity_t *var2, *var = NULL;
2143 ir_node *res = NULL;
2146 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2148 if (is_local_variable(op1) && is_local_variable(op2)) {
2149 var = op1->reference.entity;
2150 var2 = op2->reference.entity;
2152 type_t *const type = skip_typeref(var->declaration.type);
2153 ir_mode *const mode = get_ir_mode_storage(type);
2155 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2156 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2158 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2159 set_value(var2->variable.v.value_number, res);
2161 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2162 set_value(var->variable.v.value_number, res);
2168 if (is_local_variable(op1) && is_constant_expression(op2)) {
2169 var = op1->reference.entity;
2171 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2172 cmp_val = get_inversed_pnc(cmp_val);
2173 var = op2->reference.entity;
2178 type_t *const type = skip_typeref(var->declaration.type);
2179 ir_mode *const mode = get_ir_mode_storage(type);
2181 res = get_value(var->variable.v.value_number, mode);
2182 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2183 set_value(var->variable.v.value_number, res);
2189 * Handle the assume optimizer hint.
2191 * @param dbi debug info
2192 * @param expr the IL assume expression
2194 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2195 switch(expression->kind) {
2196 case EXPR_BINARY_EQUAL:
2197 case EXPR_BINARY_NOTEQUAL:
2198 case EXPR_BINARY_LESS:
2199 case EXPR_BINARY_LESSEQUAL:
2200 case EXPR_BINARY_GREATER:
2201 case EXPR_BINARY_GREATEREQUAL:
2202 return handle_assume_compare(dbi, &expression->binary);
2208 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2210 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2211 type_t *type = skip_typeref(expression->base.type);
2213 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2214 return expression_to_addr(expression->value);
2216 const expression_t *value = expression->value;
2218 switch(expression->base.kind) {
2219 case EXPR_UNARY_NEGATE: {
2220 ir_node *value_node = expression_to_firm(value);
2221 ir_mode *mode = get_ir_mode_arithmetic(type);
2222 return new_d_Minus(dbgi, value_node, mode);
2224 case EXPR_UNARY_PLUS:
2225 return expression_to_firm(value);
2226 case EXPR_UNARY_BITWISE_NEGATE: {
2227 ir_node *value_node = expression_to_firm(value);
2228 ir_mode *mode = get_ir_mode_arithmetic(type);
2229 return new_d_Not(dbgi, value_node, mode);
2231 case EXPR_UNARY_NOT: {
2232 ir_node *value_node = _expression_to_firm(value);
2233 value_node = create_conv(dbgi, value_node, mode_b);
2234 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2237 case EXPR_UNARY_DEREFERENCE: {
2238 ir_node *value_node = expression_to_firm(value);
2239 type_t *value_type = skip_typeref(value->base.type);
2240 assert(is_type_pointer(value_type));
2241 type_t *points_to = value_type->pointer.points_to;
2242 return deref_address(dbgi, points_to, value_node);
2244 case EXPR_UNARY_POSTFIX_INCREMENT:
2245 case EXPR_UNARY_POSTFIX_DECREMENT:
2246 case EXPR_UNARY_PREFIX_INCREMENT:
2247 case EXPR_UNARY_PREFIX_DECREMENT:
2248 return create_incdec(expression);
2249 case EXPR_UNARY_CAST: {
2250 ir_node *value_node = expression_to_firm(value);
2251 if (is_type_scalar(type)) {
2252 ir_mode *mode = get_ir_mode_storage(type);
2253 ir_node *node = create_conv(dbgi, value_node, mode);
2254 node = do_strict_conv(dbgi, node);
2255 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2256 node = create_conv(dbgi, node, mode_arith);
2259 /* make sure firm type is constructed */
2260 (void) get_ir_type(type);
2264 case EXPR_UNARY_CAST_IMPLICIT: {
2265 ir_node *value_node = expression_to_firm(value);
2266 if (is_type_scalar(type)) {
2267 ir_mode *mode = get_ir_mode_storage(type);
2268 ir_node *res = create_conv(dbgi, value_node, mode);
2269 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2270 res = create_conv(dbgi, res, mode_arith);
2276 case EXPR_UNARY_ASSUME:
2277 if (firm_opt.confirm)
2278 return handle_assume(dbgi, value);
2285 panic("invalid UNEXPR type found");
2289 * produces a 0/1 depending of the value of a mode_b node
2291 static ir_node *produce_condition_result(const expression_t *expression,
2292 ir_mode *mode, dbg_info *dbgi)
2294 ir_node *cur_block = get_cur_block();
2296 ir_node *one_block = new_immBlock();
2297 set_cur_block(one_block);
2298 ir_node *one = new_Const(get_mode_one(mode));
2299 ir_node *jmp_one = new_d_Jmp(dbgi);
2301 ir_node *zero_block = new_immBlock();
2302 set_cur_block(zero_block);
2303 ir_node *zero = new_Const(get_mode_null(mode));
2304 ir_node *jmp_zero = new_d_Jmp(dbgi);
2306 set_cur_block(cur_block);
2307 create_condition_evaluation(expression, one_block, zero_block);
2308 mature_immBlock(one_block);
2309 mature_immBlock(zero_block);
2311 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2312 new_Block(2, in_cf);
2314 ir_node *in[2] = { one, zero };
2315 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2320 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2321 ir_node *value, type_t *type)
2323 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2324 assert(is_type_pointer(type));
2325 pointer_type_t *const pointer_type = &type->pointer;
2326 type_t *const points_to = skip_typeref(pointer_type->points_to);
2327 unsigned elem_size = get_type_size_const(points_to);
2329 value = create_conv(dbgi, value, mode);
2331 /* gcc extension: allow arithmetic with void * and function * */
2332 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2333 is_type_function(points_to)) {
2337 assert(elem_size >= 1);
2341 ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2342 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode);
2346 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2347 ir_node *left, ir_node *right)
2350 type_t *type_left = skip_typeref(expression->left->base.type);
2351 type_t *type_right = skip_typeref(expression->right->base.type);
2353 expression_kind_t kind = expression->base.kind;
2356 case EXPR_BINARY_SHIFTLEFT:
2357 case EXPR_BINARY_SHIFTRIGHT:
2358 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2359 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2360 mode = get_irn_mode(left);
2361 right = create_conv(dbgi, right, mode_uint);
2364 case EXPR_BINARY_SUB:
2365 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2366 const pointer_type_t *const ptr_type = &type_left->pointer;
2368 mode = get_ir_mode_arithmetic(expression->base.type);
2369 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2370 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2371 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2372 ir_node *const no_mem = new_NoMem();
2373 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2374 mode, op_pin_state_floats);
2375 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2378 case EXPR_BINARY_SUB_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);
2386 case EXPR_BINARY_ADD:
2387 case EXPR_BINARY_ADD_ASSIGN:
2388 if (is_type_pointer(type_left)) {
2389 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2390 mode = get_ir_mode_arithmetic(type_left);
2392 } else if (is_type_pointer(type_right)) {
2393 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2394 mode = get_ir_mode_arithmetic(type_right);
2401 mode = get_ir_mode_arithmetic(type_right);
2402 left = create_conv(dbgi, left, mode);
2407 case EXPR_BINARY_ADD_ASSIGN:
2408 case EXPR_BINARY_ADD:
2409 return new_d_Add(dbgi, left, right, mode);
2410 case EXPR_BINARY_SUB_ASSIGN:
2411 case EXPR_BINARY_SUB:
2412 return new_d_Sub(dbgi, left, right, mode);
2413 case EXPR_BINARY_MUL_ASSIGN:
2414 case EXPR_BINARY_MUL:
2415 return new_d_Mul(dbgi, left, right, mode);
2416 case EXPR_BINARY_BITWISE_AND:
2417 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2418 return new_d_And(dbgi, left, right, mode);
2419 case EXPR_BINARY_BITWISE_OR:
2420 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2421 return new_d_Or(dbgi, left, right, mode);
2422 case EXPR_BINARY_BITWISE_XOR:
2423 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2424 return new_d_Eor(dbgi, left, right, mode);
2425 case EXPR_BINARY_SHIFTLEFT:
2426 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2427 return new_d_Shl(dbgi, left, right, mode);
2428 case EXPR_BINARY_SHIFTRIGHT:
2429 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2430 if (mode_is_signed(mode)) {
2431 return new_d_Shrs(dbgi, left, right, mode);
2433 return new_d_Shr(dbgi, left, right, mode);
2435 case EXPR_BINARY_DIV:
2436 case EXPR_BINARY_DIV_ASSIGN: {
2437 ir_node *pin = new_Pin(new_NoMem());
2440 if (mode_is_float(mode)) {
2441 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2442 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2444 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2445 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2449 case EXPR_BINARY_MOD:
2450 case EXPR_BINARY_MOD_ASSIGN: {
2451 ir_node *pin = new_Pin(new_NoMem());
2452 assert(!mode_is_float(mode));
2453 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2454 op_pin_state_floats);
2455 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2459 panic("unexpected expression kind");
2463 static ir_node *create_lazy_op(const binary_expression_t *expression)
2465 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2466 type_t *type = skip_typeref(expression->base.type);
2467 ir_mode *mode = get_ir_mode_arithmetic(type);
2469 if (is_constant_expression(expression->left)) {
2470 long val = fold_constant(expression->left);
2471 expression_kind_t ekind = expression->base.kind;
2472 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2473 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2475 return new_Const(get_mode_null(mode));
2479 return new_Const(get_mode_one(mode));
2483 if (is_constant_expression(expression->right)) {
2484 long const valr = fold_constant(expression->right);
2486 new_Const(get_mode_one(mode)) :
2487 new_Const(get_mode_null(mode));
2490 return produce_condition_result(expression->right, mode, dbgi);
2493 return produce_condition_result((const expression_t*) expression, mode,
2497 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2498 ir_node *right, ir_mode *mode);
2500 static ir_node *create_assign_binop(const binary_expression_t *expression)
2502 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2503 const expression_t *left_expr = expression->left;
2504 type_t *type = skip_typeref(left_expr->base.type);
2505 ir_mode *left_mode = get_ir_mode_storage(type);
2506 ir_node *right = expression_to_firm(expression->right);
2507 ir_node *left_addr = expression_to_addr(left_expr);
2508 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2509 ir_node *result = create_op(dbgi, expression, left, right);
2511 result = create_conv(dbgi, result, left_mode);
2512 result = do_strict_conv(dbgi, result);
2514 result = set_value_for_expression_addr(left_expr, result, left_addr);
2516 if (!is_type_compound(type)) {
2517 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2518 result = create_conv(dbgi, result, mode_arithmetic);
2523 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2525 expression_kind_t kind = expression->base.kind;
2528 case EXPR_BINARY_EQUAL:
2529 case EXPR_BINARY_NOTEQUAL:
2530 case EXPR_BINARY_LESS:
2531 case EXPR_BINARY_LESSEQUAL:
2532 case EXPR_BINARY_GREATER:
2533 case EXPR_BINARY_GREATEREQUAL:
2534 case EXPR_BINARY_ISGREATER:
2535 case EXPR_BINARY_ISGREATEREQUAL:
2536 case EXPR_BINARY_ISLESS:
2537 case EXPR_BINARY_ISLESSEQUAL:
2538 case EXPR_BINARY_ISLESSGREATER:
2539 case EXPR_BINARY_ISUNORDERED: {
2540 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2541 ir_node *left = expression_to_firm(expression->left);
2542 ir_node *right = expression_to_firm(expression->right);
2543 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2544 long pnc = get_pnc(kind, expression->left->base.type);
2545 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2548 case EXPR_BINARY_ASSIGN: {
2549 ir_node *addr = expression_to_addr(expression->left);
2550 ir_node *right = expression_to_firm(expression->right);
2552 = set_value_for_expression_addr(expression->left, right, addr);
2554 type_t *type = skip_typeref(expression->base.type);
2555 if (!is_type_compound(type)) {
2556 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2557 res = create_conv(NULL, res, mode_arithmetic);
2561 case EXPR_BINARY_ADD:
2562 case EXPR_BINARY_SUB:
2563 case EXPR_BINARY_MUL:
2564 case EXPR_BINARY_DIV:
2565 case EXPR_BINARY_MOD:
2566 case EXPR_BINARY_BITWISE_AND:
2567 case EXPR_BINARY_BITWISE_OR:
2568 case EXPR_BINARY_BITWISE_XOR:
2569 case EXPR_BINARY_SHIFTLEFT:
2570 case EXPR_BINARY_SHIFTRIGHT:
2572 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2573 ir_node *left = expression_to_firm(expression->left);
2574 ir_node *right = expression_to_firm(expression->right);
2575 return create_op(dbgi, expression, left, right);
2577 case EXPR_BINARY_LOGICAL_AND:
2578 case EXPR_BINARY_LOGICAL_OR:
2579 return create_lazy_op(expression);
2580 case EXPR_BINARY_COMMA:
2581 /* create side effects of left side */
2582 (void) expression_to_firm(expression->left);
2583 return _expression_to_firm(expression->right);
2585 case EXPR_BINARY_ADD_ASSIGN:
2586 case EXPR_BINARY_SUB_ASSIGN:
2587 case EXPR_BINARY_MUL_ASSIGN:
2588 case EXPR_BINARY_MOD_ASSIGN:
2589 case EXPR_BINARY_DIV_ASSIGN:
2590 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2591 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2592 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2593 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2594 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2595 return create_assign_binop(expression);
2597 panic("TODO binexpr type");
2601 static ir_node *array_access_addr(const array_access_expression_t *expression)
2603 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2604 ir_node *base_addr = expression_to_firm(expression->array_ref);
2605 ir_node *offset = expression_to_firm(expression->index);
2606 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2607 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2608 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2613 static ir_node *array_access_to_firm(
2614 const array_access_expression_t *expression)
2616 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2617 ir_node *addr = array_access_addr(expression);
2618 type_t *type = revert_automatic_type_conversion(
2619 (const expression_t*) expression);
2620 type = skip_typeref(type);
2622 return deref_address(dbgi, type, addr);
2625 static long get_offsetof_offset(const offsetof_expression_t *expression)
2627 type_t *orig_type = expression->type;
2630 designator_t *designator = expression->designator;
2631 for ( ; designator != NULL; designator = designator->next) {
2632 type_t *type = skip_typeref(orig_type);
2633 /* be sure the type is constructed */
2634 (void) get_ir_type(type);
2636 if (designator->symbol != NULL) {
2637 assert(is_type_compound(type));
2638 symbol_t *symbol = designator->symbol;
2640 compound_t *compound = type->compound.compound;
2641 entity_t *iter = compound->members.entities;
2642 for ( ; iter != NULL; iter = iter->base.next) {
2643 if (iter->base.symbol == symbol) {
2647 assert(iter != NULL);
2649 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2650 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2651 offset += get_entity_offset(iter->compound_member.entity);
2653 orig_type = iter->declaration.type;
2655 expression_t *array_index = designator->array_index;
2656 assert(designator->array_index != NULL);
2657 assert(is_type_array(type));
2659 long index = fold_constant(array_index);
2660 ir_type *arr_type = get_ir_type(type);
2661 ir_type *elem_type = get_array_element_type(arr_type);
2662 long elem_size = get_type_size_bytes(elem_type);
2664 offset += index * elem_size;
2666 orig_type = type->array.element_type;
2673 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2675 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2676 long offset = get_offsetof_offset(expression);
2677 tarval *tv = new_tarval_from_long(offset, mode);
2678 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2680 return new_d_Const(dbgi, tv);
2683 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2684 ir_entity *entity, type_t *type);
2686 static ir_node *compound_literal_to_firm(
2687 const compound_literal_expression_t *expression)
2689 type_t *type = expression->type;
2691 /* create an entity on the stack */
2692 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2694 ident *const id = id_unique("CompLit.%u");
2695 ir_type *const irtype = get_ir_type(type);
2696 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2697 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2698 set_entity_ld_ident(entity, id);
2700 set_entity_variability(entity, variability_uninitialized);
2702 /* create initialisation code */
2703 initializer_t *initializer = expression->initializer;
2704 create_local_initializer(initializer, dbgi, entity, type);
2706 /* create a sel for the compound literal address */
2707 ir_node *frame = get_local_frame(entity);
2708 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2713 * Transform a sizeof expression into Firm code.
2715 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2717 type_t *type = expression->type;
2719 type = expression->tp_expression->base.type;
2720 assert(type != NULL);
2723 type = skip_typeref(type);
2724 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2725 if (is_type_array(type) && type->array.is_vla
2726 && expression->tp_expression != NULL) {
2727 expression_to_firm(expression->tp_expression);
2730 return get_type_size(type);
2733 static entity_t *get_expression_entity(const expression_t *expression)
2735 if (expression->kind != EXPR_REFERENCE)
2738 return expression->reference.entity;
2742 * Transform an alignof expression into Firm code.
2744 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2746 ir_entity *irentity = NULL;
2748 const expression_t *tp_expression = expression->tp_expression;
2749 if (tp_expression != NULL) {
2750 entity_t *entity = get_expression_entity(tp_expression);
2751 if (entity != NULL && is_declaration(entity)) {
2752 switch (entity->declaration.kind) {
2753 case DECLARATION_KIND_UNKNOWN:
2754 panic("unknown entity reference found");
2755 case DECLARATION_KIND_COMPOUND_MEMBER:
2756 irentity = entity->compound_member.entity;
2758 case DECLARATION_KIND_GLOBAL_VARIABLE:
2759 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
2760 irentity = entity->variable.v.entity;
2762 case DECLARATION_KIND_PARAMETER_ENTITY:
2763 irentity = entity->parameter.v.entity;
2765 case DECLARATION_KIND_FUNCTION:
2766 case DECLARATION_KIND_INNER_FUNCTION:
2767 irentity = entity->function.entity;
2769 case DECLARATION_KIND_PARAMETER:
2770 case DECLARATION_KIND_LOCAL_VARIABLE:
2771 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
2778 if (irentity != NULL) {
2779 irtype = get_entity_type(irentity);
2781 type_t *type = expression->type;
2782 irtype = get_ir_type(type);
2785 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2786 symconst_symbol sym;
2787 sym.type_p = irtype;
2788 return new_SymConst(mode, sym, symconst_type_align);
2791 static void init_ir_types(void);
2793 long fold_constant(const expression_t *expression)
2795 assert(is_type_valid(skip_typeref(expression->base.type)));
2797 bool constant_folding_old = constant_folding;
2798 constant_folding = true;
2802 assert(is_constant_expression(expression));
2804 ir_graph *old_current_ir_graph = current_ir_graph;
2805 current_ir_graph = get_const_code_irg();
2807 ir_node *cnst = expression_to_firm(expression);
2808 current_ir_graph = old_current_ir_graph;
2810 if (!is_Const(cnst)) {
2811 panic("couldn't fold constant");
2814 tarval *tv = get_Const_tarval(cnst);
2815 if (!tarval_is_long(tv)) {
2816 panic("result of constant folding is not integer");
2819 constant_folding = constant_folding_old;
2821 return get_tarval_long(tv);
2824 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2826 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2828 /* first try to fold a constant condition */
2829 if (is_constant_expression(expression->condition)) {
2830 long val = fold_constant(expression->condition);
2832 expression_t *true_expression = expression->true_expression;
2833 if (true_expression == NULL)
2834 true_expression = expression->condition;
2835 return expression_to_firm(true_expression);
2837 return expression_to_firm(expression->false_expression);
2841 ir_node *cur_block = get_cur_block();
2843 /* create the true block */
2844 ir_node *true_block = new_immBlock();
2845 set_cur_block(true_block);
2847 ir_node *true_val = expression->true_expression != NULL ?
2848 expression_to_firm(expression->true_expression) : NULL;
2849 ir_node *true_jmp = new_Jmp();
2851 /* create the false block */
2852 ir_node *false_block = new_immBlock();
2853 set_cur_block(false_block);
2855 ir_node *false_val = expression_to_firm(expression->false_expression);
2856 ir_node *false_jmp = new_Jmp();
2858 /* create the condition evaluation */
2859 set_cur_block(cur_block);
2860 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2861 if (expression->true_expression == NULL) {
2862 if (cond_expr != NULL) {
2863 true_val = cond_expr;
2865 /* Condition ended with a short circuit (&&, ||, !) operation.
2866 * Generate a "1" as value for the true branch. */
2867 true_val = new_Const(get_mode_one(mode_Is));
2870 mature_immBlock(true_block);
2871 mature_immBlock(false_block);
2873 /* create the common block */
2874 ir_node *in_cf[2] = { true_jmp, false_jmp };
2875 new_Block(2, in_cf);
2877 /* TODO improve static semantics, so either both or no values are NULL */
2878 if (true_val == NULL || false_val == NULL)
2881 ir_node *in[2] = { true_val, false_val };
2882 ir_mode *mode = get_irn_mode(true_val);
2883 assert(get_irn_mode(false_val) == mode);
2884 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2890 * Returns an IR-node representing the address of a field.
2892 static ir_node *select_addr(const select_expression_t *expression)
2894 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2896 construct_select_compound(expression);
2898 ir_node *compound_addr = expression_to_firm(expression->compound);
2900 entity_t *entry = expression->compound_entry;
2901 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2902 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2904 if (constant_folding) {
2905 ir_mode *mode = get_irn_mode(compound_addr);
2906 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2907 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2908 return new_d_Add(dbgi, compound_addr, ofs, mode);
2910 ir_entity *irentity = entry->compound_member.entity;
2911 assert(irentity != NULL);
2912 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2916 static ir_node *select_to_firm(const select_expression_t *expression)
2918 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2919 ir_node *addr = select_addr(expression);
2920 type_t *type = revert_automatic_type_conversion(
2921 (const expression_t*) expression);
2922 type = skip_typeref(type);
2924 entity_t *entry = expression->compound_entry;
2925 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2926 type_t *entry_type = skip_typeref(entry->declaration.type);
2928 if (entry_type->kind == TYPE_BITFIELD) {
2929 return bitfield_extract_to_firm(expression, addr);
2932 return deref_address(dbgi, type, addr);
2935 /* Values returned by __builtin_classify_type. */
2936 typedef enum gcc_type_class
2942 enumeral_type_class,
2945 reference_type_class,
2949 function_type_class,
2960 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2962 type_t *type = expr->type_expression->base.type;
2964 /* FIXME gcc returns different values depending on whether compiling C or C++
2965 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2968 type = skip_typeref(type);
2969 switch (type->kind) {
2971 const atomic_type_t *const atomic_type = &type->atomic;
2972 switch (atomic_type->akind) {
2973 /* should not be reached */
2974 case ATOMIC_TYPE_INVALID:
2978 /* gcc cannot do that */
2979 case ATOMIC_TYPE_VOID:
2980 tc = void_type_class;
2983 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2984 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2985 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2986 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2987 case ATOMIC_TYPE_SHORT:
2988 case ATOMIC_TYPE_USHORT:
2989 case ATOMIC_TYPE_INT:
2990 case ATOMIC_TYPE_UINT:
2991 case ATOMIC_TYPE_LONG:
2992 case ATOMIC_TYPE_ULONG:
2993 case ATOMIC_TYPE_LONGLONG:
2994 case ATOMIC_TYPE_ULONGLONG:
2995 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2996 tc = integer_type_class;
2999 case ATOMIC_TYPE_FLOAT:
3000 case ATOMIC_TYPE_DOUBLE:
3001 case ATOMIC_TYPE_LONG_DOUBLE:
3002 tc = real_type_class;
3005 panic("Unexpected atomic type in classify_type_to_firm().");
3008 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3009 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3010 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
3011 case TYPE_ARRAY: /* gcc handles this as pointer */
3012 case TYPE_FUNCTION: /* gcc handles this as pointer */
3013 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3014 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3015 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3017 /* gcc handles this as integer */
3018 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3020 /* gcc classifies the referenced type */
3021 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3024 /* typedef/typeof should be skipped already */
3031 panic("unexpected TYPE classify_type_to_firm().");
3035 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3036 tarval *const tv = new_tarval_from_long(tc, mode_int);
3037 return new_d_Const(dbgi, tv);
3040 static ir_node *function_name_to_firm(
3041 const funcname_expression_t *const expr)
3043 switch(expr->kind) {
3044 case FUNCNAME_FUNCTION:
3045 case FUNCNAME_PRETTY_FUNCTION:
3046 case FUNCNAME_FUNCDNAME:
3047 if (current_function_name == NULL) {
3048 const source_position_t *const src_pos = &expr->base.source_position;
3049 const char *name = current_function_entity->base.symbol->string;
3050 const string_t string = { name, strlen(name) + 1 };
3051 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3053 return current_function_name;
3054 case FUNCNAME_FUNCSIG:
3055 if (current_funcsig == NULL) {
3056 const source_position_t *const src_pos = &expr->base.source_position;
3057 ir_entity *ent = get_irg_entity(current_ir_graph);
3058 const char *const name = get_entity_ld_name(ent);
3059 const string_t string = { name, strlen(name) + 1 };
3060 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3062 return current_funcsig;
3064 panic("Unsupported function name");
3067 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3069 statement_t *statement = expr->statement;
3071 assert(statement->kind == STATEMENT_COMPOUND);
3072 return compound_statement_to_firm(&statement->compound);
3075 static ir_node *va_start_expression_to_firm(
3076 const va_start_expression_t *const expr)
3078 type_t *const type = current_function_entity->declaration.type;
3079 ir_type *const method_type = get_ir_type(type);
3080 int const n = get_method_n_params(method_type) - 1;
3081 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
3082 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
3083 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3084 ir_node *const no_mem = new_NoMem();
3085 ir_node *const arg_sel =
3086 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3088 ir_node *const cnst = get_type_size(expr->parameter->base.type);
3089 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3090 set_value_for_expression(expr->ap, add);
3095 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3097 type_t *const type = expr->base.type;
3098 expression_t *const ap_expr = expr->ap;
3099 ir_node *const ap_addr = expression_to_addr(ap_expr);
3100 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3101 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3102 ir_node *const res = deref_address(dbgi, type, ap);
3104 ir_node *const cnst = get_type_size(expr->base.type);
3105 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
3107 set_value_for_expression_addr(ap_expr, add, ap_addr);
3112 static ir_node *dereference_addr(const unary_expression_t *const expression)
3114 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3115 return expression_to_firm(expression->value);
3119 * Returns a IR-node representing an lvalue of the given expression.
3121 static ir_node *expression_to_addr(const expression_t *expression)
3123 switch(expression->kind) {
3124 case EXPR_ARRAY_ACCESS:
3125 return array_access_addr(&expression->array_access);
3127 return call_expression_to_firm(&expression->call);
3128 case EXPR_COMPOUND_LITERAL:
3129 return compound_literal_to_firm(&expression->compound_literal);
3130 case EXPR_REFERENCE:
3131 return reference_addr(&expression->reference);
3133 return select_addr(&expression->select);
3134 case EXPR_UNARY_DEREFERENCE:
3135 return dereference_addr(&expression->unary);
3139 panic("trying to get address of non-lvalue");
3142 static ir_node *builtin_constant_to_firm(
3143 const builtin_constant_expression_t *expression)
3145 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3148 if (is_constant_expression(expression->value)) {
3153 return new_Const_long(mode, v);
3156 static ir_node *builtin_prefetch_to_firm(
3157 const builtin_prefetch_expression_t *expression)
3159 ir_node *adr = expression_to_firm(expression->adr);
3160 /* no Firm support for prefetch yet */
3165 static ir_node *get_label_block(label_t *label)
3167 if (label->block != NULL)
3168 return label->block;
3170 /* beware: might be called from create initializer with current_ir_graph
3171 * set to const_code_irg. */
3172 ir_graph *rem = current_ir_graph;
3173 current_ir_graph = current_function;
3175 ir_node *block = new_immBlock();
3177 label->block = block;
3179 ARR_APP1(label_t *, all_labels, label);
3181 current_ir_graph = rem;
3186 * Pointer to a label. This is used for the
3187 * GNU address-of-label extension.
3189 static ir_node *label_address_to_firm(
3190 const label_address_expression_t *label)
3192 ir_node *block = get_label_block(label->label);
3193 ir_label_t nr = get_Block_label(block);
3196 nr = get_irp_next_label_nr();
3197 set_Block_label(block, nr);
3199 symconst_symbol value;
3201 return new_SymConst(mode_P_code, value, symconst_label);
3204 static ir_node *builtin_symbol_to_firm(
3205 const builtin_symbol_expression_t *expression)
3207 /* for gcc compatibility we have to produce (dummy) addresses for some
3209 if (warning.other) {
3210 warningf(&expression->base.source_position,
3211 "taking address of builtin '%Y'", expression->symbol);
3214 /* simply create a NULL pointer */
3215 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
3216 ir_node *res = new_Const_long(mode, 0);
3222 * creates firm nodes for an expression. The difference between this function
3223 * and expression_to_firm is, that this version might produce mode_b nodes
3224 * instead of mode_Is.
3226 static ir_node *_expression_to_firm(const expression_t *expression)
3229 if (!constant_folding) {
3230 assert(!expression->base.transformed);
3231 ((expression_t*) expression)->base.transformed = true;
3235 switch (expression->kind) {
3236 case EXPR_CHARACTER_CONSTANT:
3237 return character_constant_to_firm(&expression->conste);
3238 case EXPR_WIDE_CHARACTER_CONSTANT:
3239 return wide_character_constant_to_firm(&expression->conste);
3241 return const_to_firm(&expression->conste);
3242 case EXPR_STRING_LITERAL:
3243 return string_literal_to_firm(&expression->string);
3244 case EXPR_WIDE_STRING_LITERAL:
3245 return wide_string_literal_to_firm(&expression->wide_string);
3246 case EXPR_REFERENCE:
3247 return reference_expression_to_firm(&expression->reference);
3248 case EXPR_REFERENCE_ENUM_VALUE:
3249 return reference_expression_enum_value_to_firm(&expression->reference);
3251 return call_expression_to_firm(&expression->call);
3253 return unary_expression_to_firm(&expression->unary);
3255 return binary_expression_to_firm(&expression->binary);
3256 case EXPR_ARRAY_ACCESS:
3257 return array_access_to_firm(&expression->array_access);
3259 return sizeof_to_firm(&expression->typeprop);
3261 return alignof_to_firm(&expression->typeprop);
3262 case EXPR_CONDITIONAL:
3263 return conditional_to_firm(&expression->conditional);
3265 return select_to_firm(&expression->select);
3266 case EXPR_CLASSIFY_TYPE:
3267 return classify_type_to_firm(&expression->classify_type);
3269 return function_name_to_firm(&expression->funcname);
3270 case EXPR_STATEMENT:
3271 return statement_expression_to_firm(&expression->statement);
3273 return va_start_expression_to_firm(&expression->va_starte);
3275 return va_arg_expression_to_firm(&expression->va_arge);
3276 case EXPR_BUILTIN_SYMBOL:
3277 return builtin_symbol_to_firm(&expression->builtin_symbol);
3278 case EXPR_BUILTIN_CONSTANT_P:
3279 return builtin_constant_to_firm(&expression->builtin_constant);
3280 case EXPR_BUILTIN_PREFETCH:
3281 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3283 return offsetof_to_firm(&expression->offsetofe);
3284 case EXPR_COMPOUND_LITERAL:
3285 return compound_literal_to_firm(&expression->compound_literal);
3286 case EXPR_LABEL_ADDRESS:
3287 return label_address_to_firm(&expression->label_address);
3293 panic("invalid expression found");
3296 static bool is_builtin_expect(const expression_t *expression)
3298 if (expression->kind != EXPR_CALL)
3301 expression_t *function = expression->call.function;
3302 if (function->kind != EXPR_BUILTIN_SYMBOL)
3304 if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3310 static bool produces_mode_b(const expression_t *expression)
3312 switch (expression->kind) {
3313 case EXPR_BINARY_EQUAL:
3314 case EXPR_BINARY_NOTEQUAL:
3315 case EXPR_BINARY_LESS:
3316 case EXPR_BINARY_LESSEQUAL:
3317 case EXPR_BINARY_GREATER:
3318 case EXPR_BINARY_GREATEREQUAL:
3319 case EXPR_BINARY_ISGREATER:
3320 case EXPR_BINARY_ISGREATEREQUAL:
3321 case EXPR_BINARY_ISLESS:
3322 case EXPR_BINARY_ISLESSEQUAL:
3323 case EXPR_BINARY_ISLESSGREATER:
3324 case EXPR_BINARY_ISUNORDERED:
3325 case EXPR_UNARY_NOT:
3329 if (is_builtin_expect(expression)) {
3330 expression_t *argument = expression->call.arguments->expression;
3331 return produces_mode_b(argument);
3334 case EXPR_BINARY_COMMA:
3335 return produces_mode_b(expression->binary.right);
3342 static ir_node *expression_to_firm(const expression_t *expression)
3344 if (!produces_mode_b(expression)) {
3345 ir_node *res = _expression_to_firm(expression);
3346 assert(res == NULL || get_irn_mode(res) != mode_b);
3350 if (is_constant_expression(expression)) {
3351 ir_node *res = _expression_to_firm(expression);
3352 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3353 assert(is_Const(res));
3354 if (is_Const_null(res)) {
3355 return new_Const_long(mode, 0);
3357 return new_Const_long(mode, 1);
3361 /* we have to produce a 0/1 from the mode_b expression */
3362 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3363 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3364 return produce_condition_result(expression, mode, dbgi);
3368 * create a short-circuit expression evaluation that tries to construct
3369 * efficient control flow structures for &&, || and ! expressions
3371 static ir_node *create_condition_evaluation(const expression_t *expression,
3372 ir_node *true_block,
3373 ir_node *false_block)
3375 switch(expression->kind) {
3376 case EXPR_UNARY_NOT: {
3377 const unary_expression_t *unary_expression = &expression->unary;
3378 create_condition_evaluation(unary_expression->value, false_block,
3382 case EXPR_BINARY_LOGICAL_AND: {
3383 const binary_expression_t *binary_expression = &expression->binary;
3385 ir_node *extra_block = new_immBlock();
3386 create_condition_evaluation(binary_expression->left, extra_block,
3388 mature_immBlock(extra_block);
3389 set_cur_block(extra_block);
3390 create_condition_evaluation(binary_expression->right, true_block,
3394 case EXPR_BINARY_LOGICAL_OR: {
3395 const binary_expression_t *binary_expression = &expression->binary;
3397 ir_node *extra_block = new_immBlock();
3398 create_condition_evaluation(binary_expression->left, true_block,
3400 mature_immBlock(extra_block);
3401 set_cur_block(extra_block);
3402 create_condition_evaluation(binary_expression->right, true_block,
3410 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3411 ir_node *cond_expr = _expression_to_firm(expression);
3412 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3413 ir_node *cond = new_d_Cond(dbgi, condition);
3414 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3415 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3417 /* set branch prediction info based on __builtin_expect */
3418 if (is_builtin_expect(expression) && is_Cond(cond)) {
3419 call_argument_t *argument = expression->call.arguments->next;
3420 if (is_constant_expression(argument->expression)) {
3421 long cnst = fold_constant(argument->expression);
3422 cond_jmp_predicate pred;
3425 pred = COND_JMP_PRED_FALSE;
3427 pred = COND_JMP_PRED_TRUE;
3429 set_Cond_jmp_pred(cond, pred);
3433 add_immBlock_pred(true_block, true_proj);
3434 add_immBlock_pred(false_block, false_proj);
3436 set_cur_block(NULL);
3441 static void create_variable_entity(entity_t *variable,
3442 declaration_kind_t declaration_kind,
3443 ir_type *parent_type)
3445 assert(variable->kind == ENTITY_VARIABLE);
3446 type_t *type = skip_typeref(variable->declaration.type);
3447 type = get_aligned_type(type, variable->variable.alignment);
3449 ident *const id = new_id_from_str(variable->base.symbol->string);
3450 ir_type *const irtype = get_ir_type(type);
3451 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3453 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3455 handle_gnu_attributes_ent(irentity, variable);
3457 variable->declaration.kind = (unsigned char) declaration_kind;
3458 variable->variable.v.entity = irentity;
3459 set_entity_variability(irentity, variability_uninitialized);
3460 set_entity_ld_ident(irentity, create_ld_ident(variable));
3462 if (parent_type == get_tls_type())
3463 set_entity_allocation(irentity, allocation_automatic);
3464 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3465 set_entity_allocation(irentity, allocation_static);
3467 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3468 set_entity_volatility(irentity, volatility_is_volatile);
3473 typedef struct type_path_entry_t type_path_entry_t;
3474 struct type_path_entry_t {
3476 ir_initializer_t *initializer;
3478 entity_t *compound_entry;
3481 typedef struct type_path_t type_path_t;
3482 struct type_path_t {
3483 type_path_entry_t *path;
3488 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3490 size_t len = ARR_LEN(path->path);
3492 for (size_t i = 0; i < len; ++i) {
3493 const type_path_entry_t *entry = & path->path[i];
3495 type_t *type = skip_typeref(entry->type);
3496 if (is_type_compound(type)) {
3497 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3498 } else if (is_type_array(type)) {
3499 fprintf(stderr, "[%u]", (unsigned) entry->index);
3501 fprintf(stderr, "-INVALID-");
3504 fprintf(stderr, " (");
3505 print_type(path->top_type);
3506 fprintf(stderr, ")");
3509 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3511 size_t len = ARR_LEN(path->path);
3513 return & path->path[len-1];
3516 static type_path_entry_t *append_to_type_path(type_path_t *path)
3518 size_t len = ARR_LEN(path->path);
3519 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3521 type_path_entry_t *result = & path->path[len];
3522 memset(result, 0, sizeof(result[0]));
3526 static size_t get_compound_member_count(const compound_type_t *type)
3528 compound_t *compound = type->compound;
3529 size_t n_members = 0;
3530 entity_t *member = compound->members.entities;
3531 for ( ; member != NULL; member = member->base.next) {
3538 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3540 type_t *orig_top_type = path->top_type;
3541 type_t *top_type = skip_typeref(orig_top_type);
3543 assert(is_type_compound(top_type) || is_type_array(top_type));
3545 if (ARR_LEN(path->path) == 0) {
3548 type_path_entry_t *top = get_type_path_top(path);
3549 ir_initializer_t *initializer = top->initializer;
3550 return get_initializer_compound_value(initializer, top->index);
3554 static void descend_into_subtype(type_path_t *path)
3556 type_t *orig_top_type = path->top_type;
3557 type_t *top_type = skip_typeref(orig_top_type);
3559 assert(is_type_compound(top_type) || is_type_array(top_type));
3561 ir_initializer_t *initializer = get_initializer_entry(path);
3563 type_path_entry_t *top = append_to_type_path(path);
3564 top->type = top_type;
3568 if (is_type_compound(top_type)) {
3569 compound_t *compound = top_type->compound.compound;
3570 entity_t *entry = compound->members.entities;
3572 top->compound_entry = entry;
3574 len = get_compound_member_count(&top_type->compound);
3575 if (entry != NULL) {
3576 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3577 path->top_type = entry->declaration.type;
3580 assert(is_type_array(top_type));
3581 assert(top_type->array.size > 0);
3584 path->top_type = top_type->array.element_type;
3585 len = top_type->array.size;
3587 if (initializer == NULL
3588 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3589 initializer = create_initializer_compound(len);
3590 /* we have to set the entry at the 2nd latest path entry... */
3591 size_t path_len = ARR_LEN(path->path);
3592 assert(path_len >= 1);
3594 type_path_entry_t *entry = & path->path[path_len-2];
3595 ir_initializer_t *tinitializer = entry->initializer;
3596 set_initializer_compound_value(tinitializer, entry->index,
3600 top->initializer = initializer;
3603 static void ascend_from_subtype(type_path_t *path)
3605 type_path_entry_t *top = get_type_path_top(path);
3607 path->top_type = top->type;
3609 size_t len = ARR_LEN(path->path);
3610 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3613 static void walk_designator(type_path_t *path, const designator_t *designator)
3615 /* designators start at current object type */
3616 ARR_RESIZE(type_path_entry_t, path->path, 1);
3618 for ( ; designator != NULL; designator = designator->next) {
3619 type_path_entry_t *top = get_type_path_top(path);
3620 type_t *orig_type = top->type;
3621 type_t *type = skip_typeref(orig_type);
3623 if (designator->symbol != NULL) {
3624 assert(is_type_compound(type));
3626 symbol_t *symbol = designator->symbol;
3628 compound_t *compound = type->compound.compound;
3629 entity_t *iter = compound->members.entities;
3630 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3631 if (iter->base.symbol == symbol) {
3632 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3636 assert(iter != NULL);
3638 top->type = orig_type;
3639 top->compound_entry = iter;
3641 orig_type = iter->declaration.type;
3643 expression_t *array_index = designator->array_index;
3644 assert(designator->array_index != NULL);
3645 assert(is_type_array(type));
3647 long index = fold_constant(array_index);
3650 if (type->array.size_constant) {
3651 long array_size = type->array.size;
3652 assert(index < array_size);
3656 top->type = orig_type;
3657 top->index = (size_t) index;
3658 orig_type = type->array.element_type;
3660 path->top_type = orig_type;
3662 if (designator->next != NULL) {
3663 descend_into_subtype(path);
3667 path->invalid = false;
3670 static void advance_current_object(type_path_t *path)
3672 if (path->invalid) {
3673 /* TODO: handle this... */
3674 panic("invalid initializer in ast2firm (excessive elements)");
3677 type_path_entry_t *top = get_type_path_top(path);
3679 type_t *type = skip_typeref(top->type);
3680 if (is_type_union(type)) {
3681 top->compound_entry = NULL;
3682 } else if (is_type_struct(type)) {
3683 entity_t *entry = top->compound_entry;
3686 entry = entry->base.next;
3687 top->compound_entry = entry;
3688 if (entry != NULL) {
3689 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3690 path->top_type = entry->declaration.type;
3694 assert(is_type_array(type));
3697 if (!type->array.size_constant || top->index < type->array.size) {
3702 /* we're past the last member of the current sub-aggregate, try if we
3703 * can ascend in the type hierarchy and continue with another subobject */
3704 size_t len = ARR_LEN(path->path);
3707 ascend_from_subtype(path);
3708 advance_current_object(path);
3710 path->invalid = true;
3715 static ir_initializer_t *create_ir_initializer(
3716 const initializer_t *initializer, type_t *type);
3718 static ir_initializer_t *create_ir_initializer_value(
3719 const initializer_value_t *initializer)
3721 if (is_type_compound(initializer->value->base.type)) {
3722 panic("initializer creation for compounds not implemented yet");
3724 ir_node *value = expression_to_firm(initializer->value);
3725 type_t *type = initializer->value->base.type;
3726 ir_mode *mode = get_ir_mode_storage(type);
3727 value = create_conv(NULL, value, mode);
3728 return create_initializer_const(value);
3731 /** test wether type can be initialized by a string constant */
3732 static bool is_string_type(type_t *type)
3735 if (is_type_pointer(type)) {
3736 inner = skip_typeref(type->pointer.points_to);
3737 } else if(is_type_array(type)) {
3738 inner = skip_typeref(type->array.element_type);
3743 return is_type_integer(inner);
3746 static ir_initializer_t *create_ir_initializer_list(
3747 const initializer_list_t *initializer, type_t *type)
3750 memset(&path, 0, sizeof(path));
3751 path.top_type = type;
3752 path.path = NEW_ARR_F(type_path_entry_t, 0);
3754 descend_into_subtype(&path);
3756 for (size_t i = 0; i < initializer->len; ++i) {
3757 const initializer_t *sub_initializer = initializer->initializers[i];
3759 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3760 walk_designator(&path, sub_initializer->designator.designator);
3764 if (sub_initializer->kind == INITIALIZER_VALUE) {
3765 /* we might have to descend into types until we're at a scalar
3768 type_t *orig_top_type = path.top_type;
3769 type_t *top_type = skip_typeref(orig_top_type);
3771 if (is_type_scalar(top_type))
3773 descend_into_subtype(&path);
3775 } else if (sub_initializer->kind == INITIALIZER_STRING
3776 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3777 /* we might have to descend into types until we're at a scalar
3780 type_t *orig_top_type = path.top_type;
3781 type_t *top_type = skip_typeref(orig_top_type);
3783 if (is_string_type(top_type))
3785 descend_into_subtype(&path);
3789 ir_initializer_t *sub_irinitializer
3790 = create_ir_initializer(sub_initializer, path.top_type);
3792 size_t path_len = ARR_LEN(path.path);
3793 assert(path_len >= 1);
3794 type_path_entry_t *entry = & path.path[path_len-1];
3795 ir_initializer_t *tinitializer = entry->initializer;
3796 set_initializer_compound_value(tinitializer, entry->index,
3799 advance_current_object(&path);
3802 assert(ARR_LEN(path.path) >= 1);
3803 ir_initializer_t *result = path.path[0].initializer;
3804 DEL_ARR_F(path.path);
3809 static ir_initializer_t *create_ir_initializer_string(
3810 const initializer_string_t *initializer, type_t *type)
3812 type = skip_typeref(type);
3814 size_t string_len = initializer->string.size;
3815 assert(type->kind == TYPE_ARRAY);
3816 assert(type->array.size_constant);
3817 size_t len = type->array.size;
3818 ir_initializer_t *irinitializer = create_initializer_compound(len);
3820 const char *string = initializer->string.begin;
3821 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3823 for (size_t i = 0; i < len; ++i) {
3828 tarval *tv = new_tarval_from_long(c, mode);
3829 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3831 set_initializer_compound_value(irinitializer, i, char_initializer);
3834 return irinitializer;
3837 static ir_initializer_t *create_ir_initializer_wide_string(
3838 const initializer_wide_string_t *initializer, type_t *type)
3840 size_t string_len = initializer->string.size;
3841 assert(type->kind == TYPE_ARRAY);
3842 assert(type->array.size_constant);
3843 size_t len = type->array.size;
3844 ir_initializer_t *irinitializer = create_initializer_compound(len);
3846 const wchar_rep_t *string = initializer->string.begin;
3847 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3849 for (size_t i = 0; i < len; ++i) {
3851 if (i < string_len) {
3854 tarval *tv = new_tarval_from_long(c, mode);
3855 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3857 set_initializer_compound_value(irinitializer, i, char_initializer);
3860 return irinitializer;
3863 static ir_initializer_t *create_ir_initializer(
3864 const initializer_t *initializer, type_t *type)
3866 switch(initializer->kind) {
3867 case INITIALIZER_STRING:
3868 return create_ir_initializer_string(&initializer->string, type);
3870 case INITIALIZER_WIDE_STRING:
3871 return create_ir_initializer_wide_string(&initializer->wide_string,
3874 case INITIALIZER_LIST:
3875 return create_ir_initializer_list(&initializer->list, type);
3877 case INITIALIZER_VALUE:
3878 return create_ir_initializer_value(&initializer->value);
3880 case INITIALIZER_DESIGNATOR:
3881 panic("unexpected designator initializer found");
3883 panic("unknown initializer");
3886 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3889 if (is_atomic_type(type)) {
3890 ir_mode *mode = get_type_mode(type);
3891 tarval *zero = get_mode_null(mode);
3892 ir_node *cnst = new_d_Const(dbgi, zero);
3894 /* TODO: bitfields */
3895 ir_node *mem = get_store();
3896 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, 0);
3897 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3900 assert(is_compound_type(type));
3903 if (is_Array_type(type)) {
3904 assert(has_array_upper_bound(type, 0));
3905 n_members = get_array_upper_bound_int(type, 0);
3907 n_members = get_compound_n_members(type);
3910 for (int i = 0; i < n_members; ++i) {
3913 if (is_Array_type(type)) {
3914 ir_entity *entity = get_array_element_entity(type);
3915 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3916 ir_node *cnst = new_d_Const(dbgi, index_tv);
3917 ir_node *in[1] = { cnst };
3918 irtype = get_array_element_type(type);
3919 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3921 ir_entity *member = get_compound_member(type, i);
3923 irtype = get_entity_type(member);
3924 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3927 create_dynamic_null_initializer(irtype, dbgi, addr);
3932 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3933 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3935 switch(get_initializer_kind(initializer)) {
3936 case IR_INITIALIZER_NULL: {
3937 create_dynamic_null_initializer(type, dbgi, base_addr);
3940 case IR_INITIALIZER_CONST: {
3941 ir_node *node = get_initializer_const_value(initializer);
3942 ir_mode *mode = get_irn_mode(node);
3943 ir_type *ent_type = get_entity_type(entity);
3945 /* is it a bitfield type? */
3946 if (is_Primitive_type(ent_type) &&
3947 get_primitive_base_type(ent_type) != NULL) {
3948 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3952 assert(get_type_mode(type) == mode);
3953 ir_node *mem = get_store();
3954 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, 0);
3955 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3959 case IR_INITIALIZER_TARVAL: {
3960 tarval *tv = get_initializer_tarval_value(initializer);
3961 ir_mode *mode = get_tarval_mode(tv);
3962 ir_node *cnst = new_d_Const(dbgi, tv);
3963 ir_type *ent_type = get_entity_type(entity);
3965 /* is it a bitfield type? */
3966 if (is_Primitive_type(ent_type) &&
3967 get_primitive_base_type(ent_type) != NULL) {
3968 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3972 assert(get_type_mode(type) == mode);
3973 ir_node *mem = get_store();
3974 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, 0);
3975 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3979 case IR_INITIALIZER_COMPOUND: {
3980 assert(is_compound_type(type));
3982 if (is_Array_type(type)) {
3983 assert(has_array_upper_bound(type, 0));
3984 n_members = get_array_upper_bound_int(type, 0);
3986 n_members = get_compound_n_members(type);
3989 if (get_initializer_compound_n_entries(initializer)
3990 != (unsigned) n_members)
3991 panic("initializer doesn't match compound type");
3993 for (int i = 0; i < n_members; ++i) {
3996 ir_entity *sub_entity;
3997 if (is_Array_type(type)) {
3998 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3999 ir_node *cnst = new_d_Const(dbgi, index_tv);
4000 ir_node *in[1] = { cnst };
4001 irtype = get_array_element_type(type);
4002 sub_entity = get_array_element_entity(type);
4003 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4006 sub_entity = get_compound_member(type, i);
4007 irtype = get_entity_type(sub_entity);
4008 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4012 ir_initializer_t *sub_init
4013 = get_initializer_compound_value(initializer, i);
4015 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4022 panic("invalid IR_INITIALIZER found");
4025 static void create_dynamic_initializer(ir_initializer_t *initializer,
4026 dbg_info *dbgi, ir_entity *entity)
4028 ir_node *frame = get_local_frame(entity);
4029 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4030 ir_type *type = get_entity_type(entity);
4032 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4035 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4036 ir_entity *entity, type_t *type)
4038 ir_node *memory = get_store();
4039 ir_node *nomem = new_NoMem();
4040 ir_node *frame = get_irg_frame(current_ir_graph);
4041 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4043 if (initializer->kind == INITIALIZER_VALUE) {
4044 initializer_value_t *initializer_value = &initializer->value;
4046 ir_node *value = expression_to_firm(initializer_value->value);
4047 type = skip_typeref(type);
4048 assign_value(dbgi, addr, type, value);
4052 if (!is_constant_initializer(initializer)) {
4053 ir_initializer_t *irinitializer
4054 = create_ir_initializer(initializer, type);
4056 create_dynamic_initializer(irinitializer, dbgi, entity);
4060 /* create the ir_initializer */
4061 ir_graph *const old_current_ir_graph = current_ir_graph;
4062 current_ir_graph = get_const_code_irg();
4064 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4066 assert(current_ir_graph == get_const_code_irg());
4067 current_ir_graph = old_current_ir_graph;
4069 /* create a "template" entity which is copied to the entity on the stack */
4070 ident *const id = id_unique("initializer.%u");
4071 ir_type *const irtype = get_ir_type(type);
4072 ir_type *const global_type = get_glob_type();
4073 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4074 set_entity_ld_ident(init_entity, id);
4076 set_entity_variability(init_entity, variability_initialized);
4077 set_entity_visibility(init_entity, visibility_local);
4078 set_entity_allocation(init_entity, allocation_static);
4080 set_entity_initializer(init_entity, irinitializer);
4082 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4083 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4085 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4086 set_store(copyb_mem);
4089 static void create_initializer_local_variable_entity(entity_t *entity)
4091 assert(entity->kind == ENTITY_VARIABLE);
4092 initializer_t *initializer = entity->variable.initializer;
4093 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4094 ir_entity *irentity = entity->variable.v.entity;
4095 type_t *type = entity->declaration.type;
4097 type = get_aligned_type(type, entity->variable.alignment);
4098 create_local_initializer(initializer, dbgi, irentity, type);
4101 static void create_variable_initializer(entity_t *entity)
4103 assert(entity->kind == ENTITY_VARIABLE);
4104 initializer_t *initializer = entity->variable.initializer;
4105 if (initializer == NULL)
4108 declaration_kind_t declaration_kind
4109 = (declaration_kind_t) entity->declaration.kind;
4110 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4111 create_initializer_local_variable_entity(entity);
4115 type_t *type = entity->declaration.type;
4116 type_qualifiers_t tq = get_type_qualifier(type, true);
4118 if (initializer->kind == INITIALIZER_VALUE) {
4119 initializer_value_t *initializer_value = &initializer->value;
4120 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4122 ir_node *value = expression_to_firm(initializer_value->value);
4124 type_t *type = initializer_value->value->base.type;
4125 ir_mode *mode = get_ir_mode_storage(type);
4126 value = create_conv(dbgi, value, mode);
4127 value = do_strict_conv(dbgi, value);
4129 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4130 set_value(entity->variable.v.value_number, value);
4132 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4134 ir_entity *irentity = entity->variable.v.entity;
4136 if (tq & TYPE_QUALIFIER_CONST) {
4137 set_entity_variability(irentity, variability_constant);
4139 set_entity_variability(irentity, variability_initialized);
4141 set_atomic_ent_value(irentity, value);
4144 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4145 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4147 ir_entity *irentity = entity->variable.v.entity;
4148 ir_initializer_t *irinitializer
4149 = create_ir_initializer(initializer, type);
4151 if (tq & TYPE_QUALIFIER_CONST) {
4152 set_entity_variability(irentity, variability_constant);
4154 set_entity_variability(irentity, variability_initialized);
4156 set_entity_initializer(irentity, irinitializer);
4160 static void create_variable_length_array(entity_t *entity)
4162 assert(entity->kind == ENTITY_VARIABLE);
4163 assert(entity->variable.initializer == NULL);
4165 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4166 entity->variable.v.vla_base = NULL;
4168 /* TODO: record VLA somewhere so we create the free node when we leave
4172 static void allocate_variable_length_array(entity_t *entity)
4174 assert(entity->kind == ENTITY_VARIABLE);
4175 assert(entity->variable.initializer == NULL);
4176 assert(get_cur_block() != NULL);
4178 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4179 type_t *type = entity->declaration.type;
4180 ir_type *el_type = get_ir_type(type->array.element_type);
4182 /* make sure size_node is calculated */
4183 get_type_size(type);
4184 ir_node *elems = type->array.size_node;
4185 ir_node *mem = get_store();
4186 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4188 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4189 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4192 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4193 entity->variable.v.vla_base = addr;
4197 * Creates a Firm local variable from a declaration.
4199 static void create_local_variable(entity_t *entity)
4201 assert(entity->kind == ENTITY_VARIABLE);
4202 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4204 bool needs_entity = entity->variable.address_taken;
4205 type_t *type = skip_typeref(entity->declaration.type);
4207 /* is it a variable length array? */
4208 if (is_type_array(type) && !type->array.size_constant) {
4209 create_variable_length_array(entity);
4211 } else if (is_type_array(type) || is_type_compound(type)) {
4212 needs_entity = true;
4213 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4214 needs_entity = true;
4218 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4219 create_variable_entity(entity,
4220 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4223 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4224 entity->variable.v.value_number = next_value_number_function;
4225 set_irg_loc_description(current_ir_graph, next_value_number_function,
4227 ++next_value_number_function;
4231 static void create_local_static_variable(entity_t *entity)
4233 assert(entity->kind == ENTITY_VARIABLE);
4234 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4236 type_t *type = skip_typeref(entity->declaration.type);
4237 type = get_aligned_type(type, entity->variable.alignment);
4239 ir_type *const var_type = entity->variable.thread_local ?
4240 get_tls_type() : get_glob_type();
4241 ir_type *const irtype = get_ir_type(type);
4242 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4244 size_t l = strlen(entity->base.symbol->string);
4245 char buf[l + sizeof(".%u")];
4246 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4247 ident *const id = id_unique(buf);
4249 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4251 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4252 set_entity_volatility(irentity, volatility_is_volatile);
4255 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4256 entity->variable.v.entity = irentity;
4258 set_entity_ld_ident(irentity, id);
4259 set_entity_variability(irentity, variability_uninitialized);
4260 set_entity_visibility(irentity, visibility_local);
4261 set_entity_allocation(irentity, entity->variable.thread_local ?
4262 allocation_automatic : allocation_static);
4264 ir_graph *const old_current_ir_graph = current_ir_graph;
4265 current_ir_graph = get_const_code_irg();
4267 create_variable_initializer(entity);
4269 assert(current_ir_graph == get_const_code_irg());
4270 current_ir_graph = old_current_ir_graph;
4275 static void return_statement_to_firm(return_statement_t *statement)
4277 if (get_cur_block() == NULL)
4280 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4281 type_t *type = current_function_entity->declaration.type;
4282 ir_type *func_irtype = get_ir_type(type);
4287 if (get_method_n_ress(func_irtype) > 0) {
4288 ir_type *res_type = get_method_res_type(func_irtype, 0);
4290 if (statement->value != NULL) {
4291 ir_node *node = expression_to_firm(statement->value);
4292 if (!is_compound_type(res_type)) {
4293 type_t *type = statement->value->base.type;
4294 ir_mode *mode = get_ir_mode_storage(type);
4295 node = create_conv(dbgi, node, mode);
4296 node = do_strict_conv(dbgi, node);
4301 if (is_compound_type(res_type)) {
4304 mode = get_type_mode(res_type);
4306 in[0] = new_Unknown(mode);
4310 /* build return_value for its side effects */
4311 if (statement->value != NULL) {
4312 expression_to_firm(statement->value);
4317 ir_node *store = get_store();
4318 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4320 ir_node *end_block = get_irg_end_block(current_ir_graph);
4321 add_immBlock_pred(end_block, ret);
4323 set_cur_block(NULL);
4326 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4328 if (get_cur_block() == NULL)
4331 return expression_to_firm(statement->expression);
4334 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4336 entity_t *entity = compound->scope.entities;
4337 for ( ; entity != NULL; entity = entity->base.next) {
4338 if (!is_declaration(entity))
4341 create_local_declaration(entity);
4344 ir_node *result = NULL;
4345 statement_t *statement = compound->statements;
4346 for ( ; statement != NULL; statement = statement->base.next) {
4347 if (statement->base.next == NULL
4348 && statement->kind == STATEMENT_EXPRESSION) {
4349 result = expression_statement_to_firm(
4350 &statement->expression);
4353 statement_to_firm(statement);
4359 static void create_global_variable(entity_t *entity)
4361 assert(entity->kind == ENTITY_VARIABLE);
4364 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4365 case STORAGE_CLASS_STATIC: vis = visibility_local; break;
4366 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4367 case STORAGE_CLASS_NONE: vis = visibility_external_visible; break;
4369 default: panic("Invalid storage class for global variable");
4372 ir_type *var_type = entity->variable.thread_local ?
4373 get_tls_type() : get_glob_type();
4374 create_variable_entity(entity,
4375 DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4376 set_entity_visibility(entity->variable.v.entity, vis);
4379 static void create_local_declaration(entity_t *entity)
4381 assert(is_declaration(entity));
4383 /* construct type */
4384 (void) get_ir_type(entity->declaration.type);
4385 if (entity->base.symbol == NULL) {
4389 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4390 case STORAGE_CLASS_STATIC:
4391 create_local_static_variable(entity);
4393 case STORAGE_CLASS_EXTERN:
4394 if (entity->kind == ENTITY_FUNCTION) {
4395 assert(entity->function.statement == NULL);
4396 get_function_entity(entity);
4398 create_global_variable(entity);
4399 create_variable_initializer(entity);
4402 case STORAGE_CLASS_NONE:
4403 case STORAGE_CLASS_AUTO:
4404 case STORAGE_CLASS_REGISTER:
4405 if (entity->kind == ENTITY_FUNCTION) {
4406 if (entity->function.statement != NULL) {
4407 get_function_entity(entity);
4408 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4409 enqueue_inner_function(entity);
4411 get_function_entity(entity);
4414 create_local_variable(entity);
4417 case STORAGE_CLASS_TYPEDEF:
4420 panic("invalid storage class found");
4423 static void initialize_local_declaration(entity_t *entity)
4425 if (entity->base.symbol == NULL)
4428 switch ((declaration_kind_t) entity->declaration.kind) {
4429 case DECLARATION_KIND_LOCAL_VARIABLE:
4430 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4431 create_variable_initializer(entity);
4434 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4435 allocate_variable_length_array(entity);
4438 case DECLARATION_KIND_COMPOUND_MEMBER:
4439 case DECLARATION_KIND_GLOBAL_VARIABLE:
4440 case DECLARATION_KIND_FUNCTION:
4441 case DECLARATION_KIND_INNER_FUNCTION:
4444 case DECLARATION_KIND_PARAMETER:
4445 case DECLARATION_KIND_PARAMETER_ENTITY:
4446 panic("can't initialize parameters");
4448 case DECLARATION_KIND_UNKNOWN:
4449 panic("can't initialize unknown declaration");
4451 panic("invalid declaration kind");
4454 static void declaration_statement_to_firm(declaration_statement_t *statement)
4456 entity_t * entity = statement->declarations_begin;
4457 entity_t *const last = statement->declarations_end;
4458 if (entity != NULL) {
4459 for ( ;; entity = entity->base.next) {
4460 if (is_declaration(entity)) {
4461 initialize_local_declaration(entity);
4462 } else if (entity->kind == ENTITY_TYPEDEF) {
4463 type_t *const type = skip_typeref(entity->typedefe.type);
4464 if (is_type_array(type) && type->array.is_vla)
4465 get_vla_size(&type->array);
4473 static void if_statement_to_firm(if_statement_t *statement)
4475 ir_node *cur_block = get_cur_block();
4477 ir_node *fallthrough_block = NULL;
4479 /* the true (blocks) */
4480 ir_node *true_block = NULL;
4481 if (statement->true_statement != NULL) {
4482 true_block = new_immBlock();
4483 set_cur_block(true_block);
4484 statement_to_firm(statement->true_statement);
4485 if (get_cur_block() != NULL) {
4486 ir_node *jmp = new_Jmp();
4487 if (fallthrough_block == NULL)
4488 fallthrough_block = new_immBlock();
4489 add_immBlock_pred(fallthrough_block, jmp);
4493 /* the false (blocks) */
4494 ir_node *false_block = NULL;
4495 if (statement->false_statement != NULL) {
4496 false_block = new_immBlock();
4497 set_cur_block(false_block);
4499 statement_to_firm(statement->false_statement);
4500 if (get_cur_block() != NULL) {
4501 ir_node *jmp = new_Jmp();
4502 if (fallthrough_block == NULL)
4503 fallthrough_block = new_immBlock();
4504 add_immBlock_pred(fallthrough_block, jmp);
4508 /* create the condition */
4509 if (cur_block != NULL) {
4510 if (true_block == NULL || false_block == NULL) {
4511 if (fallthrough_block == NULL)
4512 fallthrough_block = new_immBlock();
4513 if (true_block == NULL)
4514 true_block = fallthrough_block;
4515 if (false_block == NULL)
4516 false_block = fallthrough_block;
4519 set_cur_block(cur_block);
4520 create_condition_evaluation(statement->condition, true_block,
4524 mature_immBlock(true_block);
4525 if (false_block != fallthrough_block && false_block != NULL) {
4526 mature_immBlock(false_block);
4528 if (fallthrough_block != NULL) {
4529 mature_immBlock(fallthrough_block);
4532 set_cur_block(fallthrough_block);
4535 static void while_statement_to_firm(while_statement_t *statement)
4537 ir_node *jmp = NULL;
4538 if (get_cur_block() != NULL) {
4542 /* create the header block */
4543 ir_node *header_block = new_immBlock();
4545 add_immBlock_pred(header_block, jmp);
4549 ir_node *old_continue_label = continue_label;
4550 ir_node *old_break_label = break_label;
4551 continue_label = header_block;
4554 ir_node *body_block = new_immBlock();
4555 set_cur_block(body_block);
4556 statement_to_firm(statement->body);
4557 ir_node *false_block = break_label;
4559 assert(continue_label == header_block);
4560 continue_label = old_continue_label;
4561 break_label = old_break_label;
4563 if (get_cur_block() != NULL) {
4565 add_immBlock_pred(header_block, jmp);
4568 /* shortcut for while(true) */
4569 if (is_constant_expression(statement->condition)
4570 && fold_constant(statement->condition) != 0) {
4571 set_cur_block(header_block);
4572 ir_node *header_jmp = new_Jmp();
4573 add_immBlock_pred(body_block, header_jmp);
4575 keep_alive(body_block);
4576 keep_all_memory(body_block);
4577 set_cur_block(body_block);
4579 if (false_block == NULL) {
4580 false_block = new_immBlock();
4583 /* create the condition */
4584 set_cur_block(header_block);
4586 create_condition_evaluation(statement->condition, body_block,
4590 mature_immBlock(body_block);
4591 mature_immBlock(header_block);
4592 if (false_block != NULL) {
4593 mature_immBlock(false_block);
4596 set_cur_block(false_block);
4599 static void do_while_statement_to_firm(do_while_statement_t *statement)
4601 ir_node *jmp = NULL;
4602 if (get_cur_block() != NULL) {
4606 /* create the header block */
4607 ir_node *header_block = new_immBlock();
4610 ir_node *body_block = new_immBlock();
4612 add_immBlock_pred(body_block, jmp);
4615 ir_node *old_continue_label = continue_label;
4616 ir_node *old_break_label = break_label;
4617 continue_label = header_block;
4620 set_cur_block(body_block);
4621 statement_to_firm(statement->body);
4622 ir_node *false_block = break_label;
4624 assert(continue_label == header_block);
4625 continue_label = old_continue_label;
4626 break_label = old_break_label;
4628 if (get_cur_block() != NULL) {
4629 ir_node *body_jmp = new_Jmp();
4630 add_immBlock_pred(header_block, body_jmp);
4631 mature_immBlock(header_block);
4634 if (false_block == NULL) {
4635 false_block = new_immBlock();
4638 /* create the condition */
4639 set_cur_block(header_block);
4641 create_condition_evaluation(statement->condition, body_block, false_block);
4642 mature_immBlock(body_block);
4643 mature_immBlock(header_block);
4644 mature_immBlock(false_block);
4646 set_cur_block(false_block);
4649 static void for_statement_to_firm(for_statement_t *statement)
4651 ir_node *jmp = NULL;
4653 /* create declarations */
4654 entity_t *entity = statement->scope.entities;
4655 for ( ; entity != NULL; entity = entity->base.next) {
4656 if (!is_declaration(entity))
4659 create_local_declaration(entity);
4662 if (get_cur_block() != NULL) {
4663 entity = statement->scope.entities;
4664 for ( ; entity != NULL; entity = entity->base.next) {
4665 if (!is_declaration(entity))
4668 initialize_local_declaration(entity);
4671 if (statement->initialisation != NULL) {
4672 expression_to_firm(statement->initialisation);
4679 /* create the step block */
4680 ir_node *const step_block = new_immBlock();
4681 set_cur_block(step_block);
4682 if (statement->step != NULL) {
4683 expression_to_firm(statement->step);
4685 ir_node *const step_jmp = new_Jmp();
4687 /* create the header block */
4688 ir_node *const header_block = new_immBlock();
4689 set_cur_block(header_block);
4691 add_immBlock_pred(header_block, jmp);
4693 add_immBlock_pred(header_block, step_jmp);
4695 /* the false block */
4696 ir_node *const false_block = new_immBlock();
4699 ir_node *body_block;
4700 if (statement->body != NULL) {
4701 ir_node *const old_continue_label = continue_label;
4702 ir_node *const old_break_label = break_label;
4703 continue_label = step_block;
4704 break_label = false_block;
4706 body_block = new_immBlock();
4707 set_cur_block(body_block);
4708 statement_to_firm(statement->body);
4710 assert(continue_label == step_block);
4711 assert(break_label == false_block);
4712 continue_label = old_continue_label;
4713 break_label = old_break_label;
4715 if (get_cur_block() != NULL) {
4717 add_immBlock_pred(step_block, jmp);
4720 body_block = step_block;
4723 /* create the condition */
4724 set_cur_block(header_block);
4725 if (statement->condition != NULL) {
4726 create_condition_evaluation(statement->condition, body_block,
4729 keep_alive(header_block);
4730 keep_all_memory(header_block);
4732 add_immBlock_pred(body_block, jmp);
4735 mature_immBlock(body_block);
4736 mature_immBlock(false_block);
4737 mature_immBlock(step_block);
4738 mature_immBlock(header_block);
4739 mature_immBlock(false_block);
4741 set_cur_block(false_block);
4744 static void create_jump_statement(const statement_t *statement,
4745 ir_node *target_block)
4747 if (get_cur_block() == NULL)
4750 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4751 ir_node *jump = new_d_Jmp(dbgi);
4752 add_immBlock_pred(target_block, jump);
4754 set_cur_block(NULL);
4757 static ir_node *get_break_label(void)
4759 if (break_label == NULL) {
4760 break_label = new_immBlock();
4765 static void switch_statement_to_firm(switch_statement_t *statement)
4767 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4769 ir_node *expression = expression_to_firm(statement->expression);
4770 ir_node *cond = new_d_Cond(dbgi, expression);
4772 set_cur_block(NULL);
4774 ir_node *const old_switch_cond = current_switch_cond;
4775 ir_node *const old_break_label = break_label;
4776 const bool old_saw_default_label = saw_default_label;
4777 saw_default_label = false;
4778 current_switch_cond = cond;
4780 switch_statement_t *const old_switch = current_switch;
4781 current_switch = statement;
4783 /* determine a free number for the default label */
4784 unsigned long num_cases = 0;
4786 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4787 if (l->expression == NULL) {
4791 if (l->last_case >= l->first_case)
4792 num_cases += l->last_case - l->first_case + 1;
4793 if (l->last_case > def_nr)
4794 def_nr = l->last_case;
4797 if (def_nr == INT_MAX) {
4798 /* Bad: an overflow will occurr, we cannot be sure that the
4799 * maximum + 1 is a free number. Scan the values a second
4800 * time to find a free number.
4802 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4804 memset(bits, 0, (num_cases + 7) >> 3);
4805 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4806 if (l->expression == NULL) {
4810 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4811 if (start < num_cases && l->last_case >= 0) {
4812 unsigned long end = (unsigned long)l->last_case < num_cases ?
4813 (unsigned long)l->last_case : num_cases - 1;
4814 for (unsigned long cns = start; cns <= end; ++cns) {
4815 bits[cns >> 3] |= (1 << (cns & 7));
4819 /* We look at the first num_cases constants:
4820 * Either they are densed, so we took the last (num_cases)
4821 * one, or they are non densed, so we will find one free
4825 for (i = 0; i < num_cases; ++i)
4826 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4834 statement->default_proj_nr = def_nr;
4836 if (statement->body != NULL) {
4837 statement_to_firm(statement->body);
4840 if (get_cur_block() != NULL) {
4841 ir_node *jmp = new_Jmp();
4842 add_immBlock_pred(get_break_label(), jmp);
4845 if (!saw_default_label) {
4846 set_cur_block(get_nodes_block(cond));
4847 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4848 statement->default_proj_nr);
4849 add_immBlock_pred(get_break_label(), proj);
4852 if (break_label != NULL) {
4853 mature_immBlock(break_label);
4855 set_cur_block(break_label);
4857 assert(current_switch_cond == cond);
4858 current_switch = old_switch;
4859 current_switch_cond = old_switch_cond;
4860 break_label = old_break_label;
4861 saw_default_label = old_saw_default_label;
4864 static void case_label_to_firm(const case_label_statement_t *statement)
4866 if (statement->is_empty_range)
4869 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4871 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4874 ir_node *block = new_immBlock();
4876 set_cur_block(get_nodes_block(current_switch_cond));
4877 if (statement->expression != NULL) {
4878 long pn = statement->first_case;
4879 long end_pn = statement->last_case;
4880 assert(pn <= end_pn);
4881 /* create jumps for all cases in the given range */
4883 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4884 add_immBlock_pred(block, proj);
4885 } while(pn++ < end_pn);
4887 saw_default_label = true;
4888 proj = new_d_defaultProj(dbgi, current_switch_cond,
4889 current_switch->default_proj_nr);
4891 add_immBlock_pred(block, proj);
4894 if (fallthrough != NULL) {
4895 add_immBlock_pred(block, fallthrough);
4897 mature_immBlock(block);
4898 set_cur_block(block);
4900 if (statement->statement != NULL) {
4901 statement_to_firm(statement->statement);
4905 static void label_to_firm(const label_statement_t *statement)
4907 ir_node *block = get_label_block(statement->label);
4909 if (get_cur_block() != NULL) {
4910 ir_node *jmp = new_Jmp();
4911 add_immBlock_pred(block, jmp);
4914 set_cur_block(block);
4916 keep_all_memory(block);
4918 if (statement->statement != NULL) {
4919 statement_to_firm(statement->statement);
4923 static void goto_to_firm(const goto_statement_t *statement)
4925 if (get_cur_block() == NULL)
4928 if (statement->expression) {
4929 ir_node *irn = expression_to_firm(statement->expression);
4930 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4931 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4933 set_irn_link(ijmp, ijmp_list);
4936 ir_node *block = get_label_block(statement->label);
4937 ir_node *jmp = new_Jmp();
4938 add_immBlock_pred(block, jmp);
4940 set_cur_block(NULL);
4943 static void asm_statement_to_firm(const asm_statement_t *statement)
4945 bool needs_memory = false;
4947 if (statement->is_volatile) {
4948 needs_memory = true;
4951 size_t n_clobbers = 0;
4952 asm_clobber_t *clobber = statement->clobbers;
4953 for ( ; clobber != NULL; clobber = clobber->next) {
4954 const char *clobber_str = clobber->clobber.begin;
4956 if (!be_is_valid_clobber(clobber_str)) {
4957 errorf(&statement->base.source_position,
4958 "invalid clobber '%s' specified", clobber->clobber);
4962 if (strcmp(clobber_str, "memory") == 0) {
4963 needs_memory = true;
4967 ident *id = new_id_from_str(clobber_str);
4968 obstack_ptr_grow(&asm_obst, id);
4971 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4972 ident **clobbers = NULL;
4973 if (n_clobbers > 0) {
4974 clobbers = obstack_finish(&asm_obst);
4977 size_t n_inputs = 0;
4978 asm_argument_t *argument = statement->inputs;
4979 for ( ; argument != NULL; argument = argument->next)
4981 size_t n_outputs = 0;
4982 argument = statement->outputs;
4983 for ( ; argument != NULL; argument = argument->next)
4986 unsigned next_pos = 0;
4988 ir_node *ins[n_inputs + n_outputs + 1];
4991 ir_asm_constraint tmp_in_constraints[n_outputs];
4993 const expression_t *out_exprs[n_outputs];
4994 ir_node *out_addrs[n_outputs];
4995 size_t out_size = 0;
4997 argument = statement->outputs;
4998 for ( ; argument != NULL; argument = argument->next) {
4999 const char *constraints = argument->constraints.begin;
5000 asm_constraint_flags_t asm_flags
5001 = be_parse_asm_constraints(constraints);
5003 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5004 warningf(&statement->base.source_position,
5005 "some constraints in '%s' are not supported", constraints);
5007 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5008 errorf(&statement->base.source_position,
5009 "some constraints in '%s' are invalid", constraints);
5012 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5013 errorf(&statement->base.source_position,
5014 "no write flag specified for output constraints '%s'",
5019 unsigned pos = next_pos++;
5020 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5021 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5022 expression_t *expr = argument->expression;
5023 ir_node *addr = expression_to_addr(expr);
5024 /* in+output, construct an artifical same_as constraint on the
5026 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5028 ir_node *value = get_value_from_lvalue(expr, addr);
5030 snprintf(buf, sizeof(buf), "%u", pos);
5032 ir_asm_constraint constraint;
5033 constraint.pos = pos;
5034 constraint.constraint = new_id_from_str(buf);
5035 constraint.mode = get_ir_mode_storage(expr->base.type);
5036 tmp_in_constraints[in_size] = constraint;
5037 ins[in_size] = value;
5042 out_exprs[out_size] = expr;
5043 out_addrs[out_size] = addr;
5045 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5046 /* pure memory ops need no input (but we have to make sure we
5047 * attach to the memory) */
5048 assert(! (asm_flags &
5049 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5050 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5051 needs_memory = true;
5053 /* we need to attach the address to the inputs */
5054 expression_t *expr = argument->expression;
5056 ir_asm_constraint constraint;
5057 constraint.pos = pos;
5058 constraint.constraint = new_id_from_str(constraints);
5059 constraint.mode = NULL;
5060 tmp_in_constraints[in_size] = constraint;
5062 ins[in_size] = expression_to_addr(expr);
5066 errorf(&statement->base.source_position,
5067 "only modifiers but no place set in constraints '%s'",
5072 ir_asm_constraint constraint;
5073 constraint.pos = pos;
5074 constraint.constraint = new_id_from_str(constraints);
5075 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5077 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5079 assert(obstack_object_size(&asm_obst)
5080 == out_size * sizeof(ir_asm_constraint));
5081 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5084 obstack_grow(&asm_obst, tmp_in_constraints,
5085 in_size * sizeof(tmp_in_constraints[0]));
5086 /* find and count input and output arguments */
5087 argument = statement->inputs;
5088 for ( ; argument != NULL; argument = argument->next) {
5089 const char *constraints = argument->constraints.begin;
5090 asm_constraint_flags_t asm_flags
5091 = be_parse_asm_constraints(constraints);
5093 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5094 errorf(&statement->base.source_position,
5095 "some constraints in '%s' are not supported", constraints);
5098 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5099 errorf(&statement->base.source_position,
5100 "some constraints in '%s' are invalid", constraints);
5103 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5104 errorf(&statement->base.source_position,
5105 "write flag specified for input constraints '%s'",
5111 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5112 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5113 /* we can treat this as "normal" input */
5114 input = expression_to_firm(argument->expression);
5115 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5116 /* pure memory ops need no input (but we have to make sure we
5117 * attach to the memory) */
5118 assert(! (asm_flags &
5119 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5120 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5121 needs_memory = true;
5122 input = expression_to_addr(argument->expression);
5124 errorf(&statement->base.source_position,
5125 "only modifiers but no place set in constraints '%s'",
5130 ir_asm_constraint constraint;
5131 constraint.pos = next_pos++;
5132 constraint.constraint = new_id_from_str(constraints);
5133 constraint.mode = get_irn_mode(input);
5135 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5136 ins[in_size++] = input;
5140 ir_asm_constraint constraint;
5141 constraint.pos = next_pos++;
5142 constraint.constraint = new_id_from_str("");
5143 constraint.mode = mode_M;
5145 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5146 ins[in_size++] = get_store();
5149 assert(obstack_object_size(&asm_obst)
5150 == in_size * sizeof(ir_asm_constraint));
5151 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5153 /* create asm node */
5154 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5156 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5158 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5159 out_size, output_constraints,
5160 n_clobbers, clobbers, asm_text);
5162 if (statement->is_volatile) {
5163 set_irn_pinned(node, op_pin_state_pinned);
5165 set_irn_pinned(node, op_pin_state_floats);
5168 /* create output projs & connect them */
5170 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5175 for (i = 0; i < out_size; ++i) {
5176 const expression_t *out_expr = out_exprs[i];
5178 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5179 ir_node *proj = new_Proj(node, mode, pn);
5180 ir_node *addr = out_addrs[i];
5182 set_value_for_expression_addr(out_expr, proj, addr);
5186 static void ms_try_statement_to_firm(ms_try_statement_t *statement) {
5187 statement_to_firm(statement->try_statement);
5188 warningf(&statement->base.source_position, "structured exception handling ignored");
5191 static void leave_statement_to_firm(leave_statement_t *statement) {
5192 errorf(&statement->base.source_position, "__leave not supported yet");
5196 * Transform a statement.
5198 static void statement_to_firm(statement_t *statement)
5201 assert(!statement->base.transformed);
5202 statement->base.transformed = true;
5205 switch (statement->kind) {
5206 case STATEMENT_INVALID:
5207 panic("invalid statement found");
5208 case STATEMENT_EMPTY:
5211 case STATEMENT_COMPOUND:
5212 compound_statement_to_firm(&statement->compound);
5214 case STATEMENT_RETURN:
5215 return_statement_to_firm(&statement->returns);
5217 case STATEMENT_EXPRESSION:
5218 expression_statement_to_firm(&statement->expression);
5221 if_statement_to_firm(&statement->ifs);
5223 case STATEMENT_WHILE:
5224 while_statement_to_firm(&statement->whiles);
5226 case STATEMENT_DO_WHILE:
5227 do_while_statement_to_firm(&statement->do_while);
5229 case STATEMENT_DECLARATION:
5230 declaration_statement_to_firm(&statement->declaration);
5232 case STATEMENT_BREAK:
5233 create_jump_statement(statement, get_break_label());
5235 case STATEMENT_CONTINUE:
5236 create_jump_statement(statement, continue_label);
5238 case STATEMENT_SWITCH:
5239 switch_statement_to_firm(&statement->switchs);
5241 case STATEMENT_CASE_LABEL:
5242 case_label_to_firm(&statement->case_label);
5245 for_statement_to_firm(&statement->fors);
5247 case STATEMENT_LABEL:
5248 label_to_firm(&statement->label);
5250 case STATEMENT_GOTO:
5251 goto_to_firm(&statement->gotos);
5254 asm_statement_to_firm(&statement->asms);
5256 case STATEMENT_MS_TRY:
5257 ms_try_statement_to_firm(&statement->ms_try);
5259 case STATEMENT_LEAVE:
5260 leave_statement_to_firm(&statement->leave);
5263 panic("statement not implemented");
5266 static int count_local_variables(const entity_t *entity,
5267 const entity_t *const last)
5270 for (; entity != NULL; entity = entity->base.next) {
5274 if (entity->kind == ENTITY_VARIABLE) {
5275 type = skip_typeref(entity->declaration.type);
5276 address_taken = entity->variable.address_taken;
5277 } else if (entity->kind == ENTITY_PARAMETER) {
5278 type = skip_typeref(entity->declaration.type);
5279 address_taken = entity->parameter.address_taken;
5284 if (!address_taken && is_type_scalar(type))
5293 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5295 int *const count = env;
5297 switch (stmt->kind) {
5298 case STATEMENT_DECLARATION: {
5299 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5300 *count += count_local_variables(decl_stmt->declarations_begin,
5301 decl_stmt->declarations_end);
5306 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5314 static int get_function_n_local_vars(entity_t *entity)
5318 /* count parameters */
5319 count += count_local_variables(entity->function.parameters.entities, NULL);
5321 /* count local variables declared in body */
5322 walk_statements(entity->function.statement, count_local_variables_in_stmt,
5327 static void initialize_function_parameters(entity_t *entity)
5329 assert(entity->kind == ENTITY_FUNCTION);
5330 ir_graph *irg = current_ir_graph;
5331 ir_node *args = get_irg_args(irg);
5332 ir_node *start_block = get_irg_start_block(irg);
5333 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5336 entity_t *parameter = entity->function.parameters.entities;
5337 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5338 assert(parameter->kind == ENTITY_PARAMETER);
5339 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5340 type_t *type = skip_typeref(parameter->declaration.type);
5342 bool needs_entity = parameter->parameter.address_taken;
5343 assert(!is_type_array(type));
5344 if (is_type_compound(type)) {
5345 needs_entity = true;
5349 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5350 ident *id = new_id_from_str(parameter->base.symbol->string);
5351 set_entity_ident(entity, id);
5353 parameter->declaration.kind
5354 = DECLARATION_KIND_PARAMETER_ENTITY;
5355 parameter->parameter.v.entity = entity;
5359 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5360 ir_mode *param_mode = get_type_mode(param_irtype);
5363 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5365 ir_mode *mode = get_ir_mode_storage(type);
5366 value = create_conv(NULL, value, mode);
5367 value = do_strict_conv(NULL, value);
5369 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5370 parameter->parameter.v.value_number = next_value_number_function;
5371 set_irg_loc_description(current_ir_graph, next_value_number_function,
5373 ++next_value_number_function;
5375 set_value(parameter->parameter.v.value_number, value);
5380 * Handle additional decl modifiers for IR-graphs
5382 * @param irg the IR-graph
5383 * @param dec_modifiers additional modifiers
5385 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5387 if (decl_modifiers & DM_RETURNS_TWICE) {
5388 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5389 set_irg_additional_property(irg, mtp_property_returns_twice);
5391 if (decl_modifiers & DM_NORETURN) {
5392 /* TRUE if the declaration includes the Microsoft
5393 __declspec(noreturn) specifier. */
5394 set_irg_additional_property(irg, mtp_property_noreturn);
5396 if (decl_modifiers & DM_NOTHROW) {
5397 /* TRUE if the declaration includes the Microsoft
5398 __declspec(nothrow) specifier. */
5399 set_irg_additional_property(irg, mtp_property_nothrow);
5401 if (decl_modifiers & DM_NAKED) {
5402 /* TRUE if the declaration includes the Microsoft
5403 __declspec(naked) specifier. */
5404 set_irg_additional_property(irg, mtp_property_naked);
5406 if (decl_modifiers & DM_FORCEINLINE) {
5407 /* TRUE if the declaration includes the
5408 Microsoft __forceinline specifier. */
5409 set_irg_inline_property(irg, irg_inline_forced);
5411 if (decl_modifiers & DM_NOINLINE) {
5412 /* TRUE if the declaration includes the Microsoft
5413 __declspec(noinline) specifier. */
5414 set_irg_inline_property(irg, irg_inline_forbidden);
5418 static void add_function_pointer(ir_type *segment, ir_entity *method,
5419 const char *unique_template)
5421 ir_type *method_type = get_entity_type(method);
5422 ident *id = id_unique(unique_template);
5423 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5425 ident *ide = id_unique(unique_template);
5426 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5427 ir_graph *irg = get_const_code_irg();
5428 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5431 set_entity_compiler_generated(ptr, 1);
5432 set_entity_variability(ptr, variability_constant);
5433 set_atomic_ent_value(ptr, val);
5437 * Generate possible IJmp branches to a given label block.
5439 static void gen_ijmp_branches(ir_node *block) {
5441 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5442 add_immBlock_pred(block, ijmp);
5447 * Create code for a function.
5449 static void create_function(entity_t *entity)
5451 assert(entity->kind == ENTITY_FUNCTION);
5452 ir_entity *function_entity = get_function_entity(entity);
5454 if (entity->function.statement == NULL)
5457 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5458 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5459 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5461 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5462 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5463 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5466 current_function_entity = entity;
5467 current_function_name = NULL;
5468 current_funcsig = NULL;
5470 assert(all_labels == NULL);
5471 all_labels = NEW_ARR_F(label_t *, 0);
5474 int n_local_vars = get_function_n_local_vars(entity);
5475 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5477 ir_graph *old_current_function = current_function;
5478 current_function = irg;
5480 set_irg_fp_model(irg, firm_opt.fp_model);
5481 tarval_enable_fp_ops(1);
5482 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5484 ir_node *first_block = get_cur_block();
5486 /* set inline flags */
5487 if (entity->function.is_inline)
5488 set_irg_inline_property(irg, irg_inline_recomended);
5489 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5491 next_value_number_function = 0;
5492 initialize_function_parameters(entity);
5494 statement_to_firm(entity->function.statement);
5496 ir_node *end_block = get_irg_end_block(irg);
5498 /* do we have a return statement yet? */
5499 if (get_cur_block() != NULL) {
5500 type_t *type = skip_typeref(entity->declaration.type);
5501 assert(is_type_function(type));
5502 const function_type_t *func_type = &type->function;
5503 const type_t *return_type
5504 = skip_typeref(func_type->return_type);
5507 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5508 ret = new_Return(get_store(), 0, NULL);
5511 if (is_type_scalar(return_type)) {
5512 mode = get_ir_mode_storage(func_type->return_type);
5518 /* ยง5.1.2.2.3 main implicitly returns 0 */
5519 if (is_main(entity)) {
5520 in[0] = new_Const(get_mode_null(mode));
5522 in[0] = new_Unknown(mode);
5524 ret = new_Return(get_store(), 1, in);
5526 add_immBlock_pred(end_block, ret);
5529 bool has_computed_gotos = false;
5530 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5531 label_t *label = all_labels[i];
5532 if (label->address_taken) {
5533 gen_ijmp_branches(label->block);
5534 has_computed_gotos = true;
5536 mature_immBlock(label->block);
5538 if (has_computed_gotos) {
5539 /* if we have computed goto's in the function, we cannot inline it */
5540 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5541 warningf(&entity->base.source_position,
5542 "function '%Y' can never be inlined because it contains a computed goto",
5543 entity->base.symbol);
5545 set_irg_inline_property(irg, irg_inline_forbidden);
5548 DEL_ARR_F(all_labels);
5551 mature_immBlock(first_block);
5552 mature_immBlock(end_block);
5554 irg_finalize_cons(irg);
5556 /* finalize the frame type */
5557 ir_type *frame_type = get_irg_frame_type(irg);
5558 int n = get_compound_n_members(frame_type);
5561 for (int i = 0; i < n; ++i) {
5562 ir_entity *entity = get_compound_member(frame_type, i);
5563 ir_type *entity_type = get_entity_type(entity);
5565 int align = get_type_alignment_bytes(entity_type);
5566 if (align > align_all)
5570 misalign = offset % align;
5572 offset += align - misalign;
5576 set_entity_offset(entity, offset);
5577 offset += get_type_size_bytes(entity_type);
5579 set_type_size_bytes(frame_type, offset);
5580 set_type_alignment_bytes(frame_type, align_all);
5583 current_function = old_current_function;
5585 /* create inner functions */
5587 for (inner = next_inner_function(); inner != NULL;
5588 inner = next_inner_function()) {
5589 create_function(inner);
5593 static void scope_to_firm(scope_t *scope)
5595 /* first pass: create declarations */
5596 entity_t *entity = scope->entities;
5597 for ( ; entity != NULL; entity = entity->base.next) {
5598 if (entity->base.symbol == NULL)
5601 if (entity->kind == ENTITY_FUNCTION) {
5602 get_function_entity(entity);
5603 } else if (entity->kind == ENTITY_VARIABLE) {
5604 create_global_variable(entity);
5608 /* second pass: create code/initializers */
5609 entity = scope->entities;
5610 for ( ; entity != NULL; entity = entity->base.next) {
5611 if (entity->base.symbol == NULL)
5614 if (entity->kind == ENTITY_FUNCTION) {
5615 create_function(entity);
5616 } else if (entity->kind == ENTITY_VARIABLE) {
5617 assert(entity->declaration.kind
5618 == DECLARATION_KIND_GLOBAL_VARIABLE);
5619 current_ir_graph = get_const_code_irg();
5620 create_variable_initializer(entity);
5625 void init_ast2firm(void)
5627 obstack_init(&asm_obst);
5628 init_atomic_modes();
5630 /* OS option must be set to the backend */
5631 switch (firm_opt.os_support) {
5632 case OS_SUPPORT_MINGW:
5633 create_ld_ident = create_name_win32;
5635 case OS_SUPPORT_LINUX:
5636 create_ld_ident = create_name_linux_elf;
5638 case OS_SUPPORT_MACHO:
5639 create_ld_ident = create_name_macho;
5642 panic("unexpected OS support mode");
5645 /* create idents for all known runtime functions */
5646 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5647 rts_idents[i] = new_id_from_str(rts_data[i].name);
5650 entitymap_init(&entitymap);
5653 static void init_ir_types(void)
5655 static int ir_types_initialized = 0;
5656 if (ir_types_initialized)
5658 ir_types_initialized = 1;
5660 ir_type_int = get_ir_type(type_int);
5661 ir_type_const_char = get_ir_type(type_const_char);
5662 ir_type_wchar_t = get_ir_type(type_wchar_t);
5663 ir_type_void = get_ir_type(type_void);
5665 const backend_params *be_params = be_get_backend_param();
5666 mode_float_arithmetic = be_params->mode_float_arithmetic;
5669 void exit_ast2firm(void)
5671 entitymap_destroy(&entitymap);
5672 obstack_free(&asm_obst, NULL);
5675 static void global_asm_to_firm(statement_t *s)
5677 for (; s != NULL; s = s->base.next) {
5678 assert(s->kind == STATEMENT_ASM);
5680 char const *const text = s->asms.asm_text.begin;
5681 size_t size = s->asms.asm_text.size;
5683 /* skip the last \0 */
5684 if (text[size - 1] == '\0')
5687 ident *const id = new_id_from_chars(text, size);
5692 void translation_unit_to_firm(translation_unit_t *unit)
5694 /* just to be sure */
5695 continue_label = NULL;
5697 current_switch_cond = NULL;
5698 current_translation_unit = unit;
5701 inner_functions = NEW_ARR_F(entity_t *, 0);
5703 scope_to_firm(&unit->scope);
5704 global_asm_to_firm(unit->global_asm);
5706 DEL_ARR_F(inner_functions);
5707 inner_functions = NULL;
5709 current_ir_graph = NULL;
5710 current_translation_unit = NULL;