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);
1219 long long int v = 0;
1220 for (size_t i = 0; i < cnst->v.character.size; ++i) {
1221 if (char_is_signed) {
1222 v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1224 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1228 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1229 tarval *tv = new_tarval_from_str(buf, len, mode);
1231 return new_d_Const(dbgi, tv);
1235 * Creates a Const node representing a wide character constant.
1237 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1239 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1240 ir_mode *mode = get_ir_mode_arithmetic(cnst->base.type);
1242 long long int v = cnst->v.wide_character.begin[0];
1245 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1246 tarval *tv = new_tarval_from_str(buf, len, mode);
1248 return new_d_Const(dbgi, tv);
1252 * Creates a SymConst for a given entity.
1254 * @param dbgi debug info
1255 * @param mode the (reference) mode for the SymConst
1256 * @param entity the entity
1258 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1261 assert(entity != NULL);
1262 union symconst_symbol sym;
1263 sym.entity_p = entity;
1264 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1268 * Creates a SymConst node representing a string constant.
1270 * @param src_pos the source position of the string constant
1271 * @param id_prefix a prefix for the name of the generated string constant
1272 * @param value the value of the string constant
1274 static ir_node *string_to_firm(const source_position_t *const src_pos,
1275 const char *const id_prefix,
1276 const string_t *const value)
1278 ir_type *const global_type = get_glob_type();
1279 dbg_info *const dbgi = get_dbg_info(src_pos);
1280 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1281 ir_type_const_char, dbgi);
1283 ident *const id = id_unique(id_prefix);
1284 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1285 set_entity_ld_ident(entity, id);
1286 set_entity_variability(entity, variability_constant);
1287 set_entity_allocation(entity, allocation_static);
1289 ir_type *const elem_type = ir_type_const_char;
1290 ir_mode *const mode = get_type_mode(elem_type);
1292 const char* const string = value->begin;
1293 const size_t slen = value->size;
1295 set_array_lower_bound_int(type, 0, 0);
1296 set_array_upper_bound_int(type, 0, slen);
1297 set_type_size_bytes(type, slen);
1298 set_type_state(type, layout_fixed);
1300 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1301 for (size_t i = 0; i < slen; ++i) {
1302 tvs[i] = new_tarval_from_long(string[i], mode);
1305 set_array_entity_values(entity, tvs, slen);
1308 return create_symconst(dbgi, mode_P_data, entity);
1312 * Creates a SymConst node representing a string literal.
1314 * @param literal the string literal
1316 static ir_node *string_literal_to_firm(
1317 const string_literal_expression_t* literal)
1319 return string_to_firm(&literal->base.source_position, "Lstr.%u",
1324 * Creates a SymConst node representing a wide string literal.
1326 * @param literal the wide string literal
1328 static ir_node *wide_string_literal_to_firm(
1329 const wide_string_literal_expression_t* const literal)
1331 ir_type *const global_type = get_glob_type();
1332 ir_type *const elem_type = ir_type_wchar_t;
1333 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1334 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1337 ident *const id = id_unique("Lstr.%u");
1338 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1339 set_entity_ld_ident(entity, id);
1340 set_entity_variability(entity, variability_constant);
1341 set_entity_allocation(entity, allocation_static);
1343 ir_mode *const mode = get_type_mode(elem_type);
1345 const wchar_rep_t *const string = literal->value.begin;
1346 const size_t slen = literal->value.size;
1348 set_array_lower_bound_int(type, 0, 0);
1349 set_array_upper_bound_int(type, 0, slen);
1350 set_type_size_bytes(type, slen);
1351 set_type_state(type, layout_fixed);
1353 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1354 for (size_t i = 0; i < slen; ++i) {
1355 tvs[i] = new_tarval_from_long(string[i], mode);
1358 set_array_entity_values(entity, tvs, slen);
1361 return create_symconst(dbgi, mode_P_data, entity);
1364 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1365 ir_node *const addr)
1367 ir_type *irtype = get_ir_type(type);
1368 if (is_compound_type(irtype)
1369 || is_Method_type(irtype)
1370 || is_Array_type(irtype)) {
1374 cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1375 ? cons_volatile : 0;
1376 ir_mode *const mode = get_type_mode(irtype);
1377 ir_node *const memory = get_store();
1378 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1379 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1380 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1382 set_store(load_mem);
1384 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1385 return create_conv(dbgi, load_res, mode_arithmetic);
1389 * Creates a strict Conv if neccessary.
1391 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1393 ir_mode *mode = get_irn_mode(node);
1395 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1397 if (!mode_is_float(mode))
1400 /* check if there is already a Conv */
1401 if (is_Conv(node)) {
1402 /* convert it into a strict Conv */
1403 set_Conv_strict(node, 1);
1407 /* otherwise create a new one */
1408 return new_d_strictConv(dbgi, node, mode);
1411 static ir_node *get_global_var_address(dbg_info *const dbgi,
1412 const entity_t *const entity)
1414 assert(entity->kind == ENTITY_VARIABLE);
1415 assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1417 ir_entity *const irentity = entity->variable.v.entity;
1418 if (entity->variable.thread_local) {
1419 ir_node *const no_mem = new_NoMem();
1420 ir_node *const tls = get_irg_tls(current_ir_graph);
1421 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1423 return create_symconst(dbgi, mode_P_data, irentity);
1428 * Returns the correct base address depending on whether it is a parameter or a
1429 * normal local variable.
1431 static ir_node *get_local_frame(ir_entity *const ent)
1433 ir_graph *const irg = current_ir_graph;
1434 const ir_type *const owner = get_entity_owner(ent);
1435 if (owner == get_irg_frame_type(irg)) {
1436 return get_irg_frame(irg);
1438 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1439 return get_irg_value_param_base(irg);
1444 * Keep all memory edges of the given block.
1446 static void keep_all_memory(ir_node *block) {
1447 ir_node *old = get_cur_block();
1449 set_cur_block(block);
1450 keep_alive(get_store());
1451 /* TODO: keep all memory edges from restricted pointers */
1455 static ir_node *reference_expression_enum_value_to_firm(
1456 const reference_expression_t *ref)
1458 entity_t *entity = ref->entity;
1459 type_t *type = skip_typeref(entity->enum_value.enum_type);
1460 /* make sure the type is constructed */
1461 (void) get_ir_type(type);
1463 return new_Const(entity->enum_value.tv);
1466 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1468 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1469 entity_t *entity = ref->entity;
1470 assert(is_declaration(entity));
1471 type_t *type = skip_typeref(entity->declaration.type);
1473 /* make sure the type is constructed */
1474 (void) get_ir_type(type);
1476 switch ((declaration_kind_t) entity->declaration.kind) {
1477 case DECLARATION_KIND_UNKNOWN:
1480 case DECLARATION_KIND_LOCAL_VARIABLE: {
1481 ir_mode *const mode = get_ir_mode_storage(type);
1482 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1483 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1485 case DECLARATION_KIND_PARAMETER: {
1486 ir_mode *const mode = get_ir_mode_storage(type);
1487 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1488 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1490 case DECLARATION_KIND_FUNCTION: {
1491 ir_mode *const mode = get_ir_mode_storage(type);
1492 return create_symconst(dbgi, mode, entity->function.entity);
1494 case DECLARATION_KIND_INNER_FUNCTION: {
1495 ir_mode *const mode = get_ir_mode_storage(type);
1496 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1497 /* inner function not using the closure */
1498 return create_symconst(dbgi, mode, entity->function.entity);
1500 /* TODO: need trampoline here */
1501 panic("Trampoline code not implemented");
1502 return create_symconst(dbgi, mode, entity->function.entity);
1505 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1506 ir_node *const addr = get_global_var_address(dbgi, entity);
1507 return deref_address(dbgi, entity->declaration.type, addr);
1510 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1511 ir_entity *irentity = entity->variable.v.entity;
1512 ir_node *frame = get_local_frame(irentity);
1513 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1514 return deref_address(dbgi, entity->declaration.type, sel);
1516 case DECLARATION_KIND_PARAMETER_ENTITY: {
1517 ir_entity *irentity = entity->parameter.v.entity;
1518 ir_node *frame = get_local_frame(irentity);
1519 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1520 return deref_address(dbgi, entity->declaration.type, sel);
1523 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1524 return entity->variable.v.vla_base;
1526 case DECLARATION_KIND_COMPOUND_MEMBER:
1527 panic("not implemented reference type");
1530 panic("reference to declaration with unknown type found");
1533 static ir_node *reference_addr(const reference_expression_t *ref)
1535 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1536 entity_t *entity = ref->entity;
1537 assert(is_declaration(entity));
1539 switch((declaration_kind_t) entity->declaration.kind) {
1540 case DECLARATION_KIND_UNKNOWN:
1542 case DECLARATION_KIND_PARAMETER:
1543 case DECLARATION_KIND_LOCAL_VARIABLE:
1544 /* you can store to a local variable (so we don't panic but return NULL
1545 * as an indicator for no real address) */
1547 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1548 ir_node *const addr = get_global_var_address(dbgi, entity);
1551 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1552 ir_entity *irentity = entity->variable.v.entity;
1553 ir_node *frame = get_local_frame(irentity);
1554 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1558 case DECLARATION_KIND_PARAMETER_ENTITY: {
1559 ir_entity *irentity = entity->parameter.v.entity;
1560 ir_node *frame = get_local_frame(irentity);
1561 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1566 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1567 return entity->variable.v.vla_base;
1569 case DECLARATION_KIND_FUNCTION: {
1570 type_t *const type = skip_typeref(entity->declaration.type);
1571 ir_mode *const mode = get_ir_mode_storage(type);
1572 return create_symconst(dbgi, mode, entity->function.entity);
1575 case DECLARATION_KIND_INNER_FUNCTION:
1576 case DECLARATION_KIND_COMPOUND_MEMBER:
1577 panic("not implemented reference type");
1580 panic("reference to declaration with unknown type found");
1584 * Transform calls to builtin functions.
1586 static ir_node *process_builtin_call(const call_expression_t *call)
1588 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1590 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1591 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1593 type_t *type = skip_typeref(builtin->base.type);
1594 assert(is_type_pointer(type));
1596 type_t *function_type = skip_typeref(type->pointer.points_to);
1597 symbol_t *symbol = builtin->symbol;
1599 switch(symbol->ID) {
1600 case T___builtin_alloca: {
1601 if (call->arguments == NULL || call->arguments->next != NULL) {
1602 panic("invalid number of parameters on __builtin_alloca");
1604 expression_t *argument = call->arguments->expression;
1605 ir_node *size = expression_to_firm(argument);
1607 ir_node *store = get_store();
1608 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1610 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1612 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1617 case T___builtin_huge_val:
1618 case T___builtin_inf:
1619 case T___builtin_inff:
1620 case T___builtin_infl: {
1621 type_t *type = function_type->function.return_type;
1622 ir_mode *mode = get_ir_mode_arithmetic(type);
1623 tarval *tv = get_mode_infinite(mode);
1624 ir_node *res = new_d_Const(dbgi, tv);
1627 case T___builtin_nan:
1628 case T___builtin_nanf:
1629 case T___builtin_nanl: {
1630 /* Ignore string for now... */
1631 assert(is_type_function(function_type));
1632 type_t *type = function_type->function.return_type;
1633 ir_mode *mode = get_ir_mode_arithmetic(type);
1634 tarval *tv = get_mode_NAN(mode);
1635 ir_node *res = new_d_Const(dbgi, tv);
1638 case T___builtin_expect: {
1639 expression_t *argument = call->arguments->expression;
1640 return _expression_to_firm(argument);
1642 case T___builtin_va_end:
1643 /* evaluate the argument of va_end for its side effects */
1644 _expression_to_firm(call->arguments->expression);
1647 panic("unsupported builtin found");
1652 * Transform a call expression.
1653 * Handles some special cases, like alloca() calls, which must be resolved
1654 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1655 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1658 static ir_node *call_expression_to_firm(const call_expression_t *call)
1660 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1661 assert(get_cur_block() != NULL);
1663 expression_t *function = call->function;
1664 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1665 return process_builtin_call(call);
1667 if (function->kind == EXPR_REFERENCE) {
1668 const reference_expression_t *ref = &function->reference;
1669 entity_t *entity = ref->entity;
1671 if (entity->kind == ENTITY_FUNCTION
1672 && entity->function.entity == rts_entities[rts_alloca]) {
1673 /* handle alloca() call */
1674 expression_t *argument = call->arguments->expression;
1675 ir_node *size = expression_to_firm(argument);
1676 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
1678 size = create_conv(dbgi, size, mode);
1680 ir_node *store = get_store();
1681 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1682 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1684 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1686 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1691 ir_node *callee = expression_to_firm(function);
1693 type_t *type = skip_typeref(function->base.type);
1694 assert(is_type_pointer(type));
1695 pointer_type_t *pointer_type = &type->pointer;
1696 type_t *points_to = skip_typeref(pointer_type->points_to);
1697 assert(is_type_function(points_to));
1698 function_type_t *function_type = &points_to->function;
1700 int n_parameters = 0;
1701 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1702 ir_type *new_method_type = NULL;
1703 if (function_type->variadic || function_type->unspecified_parameters) {
1704 const call_argument_t *argument = call->arguments;
1705 for ( ; argument != NULL; argument = argument->next) {
1709 /* we need to construct a new method type matching the call
1711 int n_res = get_method_n_ress(ir_method_type);
1712 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1713 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1714 n_parameters, n_res, dbgi);
1715 set_method_calling_convention(new_method_type,
1716 get_method_calling_convention(ir_method_type));
1717 set_method_additional_properties(new_method_type,
1718 get_method_additional_properties(ir_method_type));
1719 set_method_variadicity(new_method_type,
1720 get_method_variadicity(ir_method_type));
1722 for (int i = 0; i < n_res; ++i) {
1723 set_method_res_type(new_method_type, i,
1724 get_method_res_type(ir_method_type, i));
1726 argument = call->arguments;
1727 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1728 expression_t *expression = argument->expression;
1729 ir_type *irtype = get_ir_type(expression->base.type);
1730 set_method_param_type(new_method_type, i, irtype);
1732 ir_method_type = new_method_type;
1734 n_parameters = get_method_n_params(ir_method_type);
1737 ir_node *in[n_parameters];
1739 const call_argument_t *argument = call->arguments;
1740 for (int n = 0; n < n_parameters; ++n) {
1741 expression_t *expression = argument->expression;
1742 ir_node *arg_node = expression_to_firm(expression);
1744 type_t *type = skip_typeref(expression->base.type);
1745 if (!is_type_compound(type)) {
1746 ir_mode *mode = get_ir_mode_storage(expression->base.type);
1747 arg_node = create_conv(dbgi, arg_node, mode);
1748 arg_node = do_strict_conv(dbgi, arg_node);
1753 argument = argument->next;
1756 ir_node *store = get_store();
1757 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1759 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1762 type_t *return_type = skip_typeref(function_type->return_type);
1763 ir_node *result = NULL;
1765 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1766 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1768 if (is_type_scalar(return_type)) {
1769 ir_mode *mode = get_ir_mode_storage(return_type);
1770 result = new_d_Proj(dbgi, resproj, mode, 0);
1771 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1772 result = create_conv(NULL, result, mode_arith);
1774 ir_mode *mode = mode_P_data;
1775 result = new_d_Proj(dbgi, resproj, mode, 0);
1779 if (function->kind == EXPR_REFERENCE &&
1780 function->reference.entity->declaration.modifiers & DM_NORETURN) {
1781 /* A dead end: Keep the Call and the Block. Also place all further
1782 * nodes into a new and unreachable block. */
1784 keep_alive(get_cur_block());
1791 static void statement_to_firm(statement_t *statement);
1792 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1794 static ir_node *expression_to_addr(const expression_t *expression);
1795 static ir_node *create_condition_evaluation(const expression_t *expression,
1796 ir_node *true_block,
1797 ir_node *false_block);
1799 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1802 if (!is_type_compound(type)) {
1803 ir_mode *mode = get_ir_mode_storage(type);
1804 value = create_conv(dbgi, value, mode);
1805 value = do_strict_conv(dbgi, value);
1808 ir_node *memory = get_store();
1810 if (is_type_scalar(type)) {
1811 cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1812 ? cons_volatile : 0;
1813 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1814 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1815 set_store(store_mem);
1817 ir_type *irtype = get_ir_type(type);
1818 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1819 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1820 set_store(copyb_mem);
1824 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1826 tarval *all_one = get_mode_all_one(mode);
1827 int mode_size = get_mode_size_bits(mode);
1829 assert(offset >= 0);
1831 assert(offset + size <= mode_size);
1832 if (size == mode_size) {
1836 long shiftr = get_mode_size_bits(mode) - size;
1837 long shiftl = offset;
1838 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1839 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1840 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1841 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1846 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1847 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1849 ir_type *entity_type = get_entity_type(entity);
1850 ir_type *base_type = get_primitive_base_type(entity_type);
1851 assert(base_type != NULL);
1852 ir_mode *mode = get_type_mode(base_type);
1854 value = create_conv(dbgi, value, mode);
1856 /* kill upper bits of value and shift to right position */
1857 int bitoffset = get_entity_offset_bits_remainder(entity);
1858 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1860 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1861 ir_node *mask_node = new_d_Const(dbgi, mask);
1862 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1863 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1864 ir_node *shiftcount = new_d_Const(dbgi, shiftl);
1865 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1867 /* load current value */
1868 ir_node *mem = get_store();
1869 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1870 set_volatile ? cons_volatile : 0);
1871 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1872 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1873 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1874 tarval *inv_mask = tarval_not(shift_mask);
1875 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1876 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1878 /* construct new value and store */
1879 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1880 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1881 set_volatile ? cons_volatile : 0);
1882 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1883 set_store(store_mem);
1885 return value_masked;
1888 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1891 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1892 type_t *type = expression->base.type;
1893 ir_mode *mode = get_ir_mode_storage(type);
1894 ir_node *mem = get_store();
1895 ir_node *load = new_d_Load(dbgi, mem, addr, mode, 0);
1896 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1897 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1899 load_res = create_conv(dbgi, load_res, mode_int);
1901 set_store(load_mem);
1903 /* kill upper bits */
1904 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1905 ir_entity *entity = expression->compound_entry->compound_member.entity;
1906 int bitoffset = get_entity_offset_bits_remainder(entity);
1907 ir_type *entity_type = get_entity_type(entity);
1908 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1909 long shift_bitsl = machine_size - bitoffset - bitsize;
1910 assert(shift_bitsl >= 0);
1911 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1912 ir_node *countl = new_d_Const(dbgi, tvl);
1913 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1915 long shift_bitsr = bitoffset + shift_bitsl;
1916 assert(shift_bitsr <= (long) machine_size);
1917 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1918 ir_node *countr = new_d_Const(dbgi, tvr);
1920 if (mode_is_signed(mode)) {
1921 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1923 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1926 return create_conv(dbgi, shiftr, mode);
1929 /* make sure the selected compound type is constructed */
1930 static void construct_select_compound(const select_expression_t *expression)
1932 type_t *type = skip_typeref(expression->compound->base.type);
1933 if (is_type_pointer(type)) {
1934 type = type->pointer.points_to;
1936 (void) get_ir_type(type);
1939 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1940 ir_node *value, ir_node *addr)
1942 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1943 type_t *type = skip_typeref(expression->base.type);
1945 if (!is_type_compound(type)) {
1946 ir_mode *mode = get_ir_mode_storage(type);
1947 value = create_conv(dbgi, value, mode);
1948 value = do_strict_conv(dbgi, value);
1951 if (expression->kind == EXPR_REFERENCE) {
1952 const reference_expression_t *ref = &expression->reference;
1954 entity_t *entity = ref->entity;
1955 assert(is_declaration(entity));
1956 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1957 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1958 set_value(entity->variable.v.value_number, value);
1960 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1961 set_value(entity->parameter.v.value_number, value);
1967 addr = expression_to_addr(expression);
1968 assert(addr != NULL);
1970 if (expression->kind == EXPR_SELECT) {
1971 const select_expression_t *select = &expression->select;
1973 construct_select_compound(select);
1975 entity_t *entity = select->compound_entry;
1976 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1977 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1978 ir_entity *irentity = entity->compound_member.entity;
1980 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1981 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
1987 assign_value(dbgi, addr, type, value);
1991 static void set_value_for_expression(const expression_t *expression,
1994 set_value_for_expression_addr(expression, value, NULL);
1997 static ir_node *get_value_from_lvalue(const expression_t *expression,
2000 if (expression->kind == EXPR_REFERENCE) {
2001 const reference_expression_t *ref = &expression->reference;
2003 entity_t *entity = ref->entity;
2004 assert(entity->kind == ENTITY_VARIABLE
2005 || entity->kind == ENTITY_PARAMETER);
2006 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2008 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2009 value_number = entity->variable.v.value_number;
2010 assert(addr == NULL);
2011 type_t *type = skip_typeref(expression->base.type);
2012 ir_mode *mode = get_ir_mode_storage(type);
2013 ir_node *res = get_value(value_number, mode);
2014 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2015 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2016 value_number = entity->parameter.v.value_number;
2017 assert(addr == NULL);
2018 type_t *type = skip_typeref(expression->base.type);
2019 ir_mode *mode = get_ir_mode_storage(type);
2020 ir_node *res = get_value(value_number, mode);
2021 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2025 assert(addr != NULL);
2026 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2029 if (expression->kind == EXPR_SELECT &&
2030 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2031 construct_select_compound(&expression->select);
2032 value = bitfield_extract_to_firm(&expression->select, addr);
2034 value = deref_address(dbgi, expression->base.type, addr);
2041 static ir_node *create_incdec(const unary_expression_t *expression)
2043 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2044 const expression_t *value_expr = expression->value;
2045 ir_node *addr = expression_to_addr(value_expr);
2046 ir_node *value = get_value_from_lvalue(value_expr, addr);
2048 type_t *type = skip_typeref(expression->base.type);
2049 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2052 if (is_type_pointer(type)) {
2053 pointer_type_t *pointer_type = &type->pointer;
2054 offset = get_type_size(pointer_type->points_to);
2056 assert(is_type_arithmetic(type));
2057 offset = new_Const(get_mode_one(mode));
2061 ir_node *store_value;
2062 switch(expression->base.kind) {
2063 case EXPR_UNARY_POSTFIX_INCREMENT:
2065 store_value = new_d_Add(dbgi, value, offset, mode);
2067 case EXPR_UNARY_POSTFIX_DECREMENT:
2069 store_value = new_d_Sub(dbgi, value, offset, mode);
2071 case EXPR_UNARY_PREFIX_INCREMENT:
2072 result = new_d_Add(dbgi, value, offset, mode);
2073 store_value = result;
2075 case EXPR_UNARY_PREFIX_DECREMENT:
2076 result = new_d_Sub(dbgi, value, offset, mode);
2077 store_value = result;
2080 panic("no incdec expr in create_incdec");
2083 set_value_for_expression_addr(value_expr, store_value, addr);
2088 static bool is_local_variable(expression_t *expression)
2090 if (expression->kind != EXPR_REFERENCE)
2092 reference_expression_t *ref_expr = &expression->reference;
2093 entity_t *entity = ref_expr->entity;
2094 if (entity->kind != ENTITY_VARIABLE)
2096 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2097 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2100 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2103 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2104 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2105 case EXPR_BINARY_NOTEQUAL:
2106 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2107 case EXPR_BINARY_ISLESS:
2108 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2109 case EXPR_BINARY_ISLESSEQUAL:
2110 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2111 case EXPR_BINARY_ISGREATER:
2112 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2113 case EXPR_BINARY_ISGREATEREQUAL:
2114 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2115 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2120 panic("trying to get pn_Cmp from non-comparison binexpr type");
2124 * Handle the assume optimizer hint: check if a Confirm
2125 * node can be created.
2127 * @param dbi debug info
2128 * @param expr the IL assume expression
2130 * we support here only some simple cases:
2135 static ir_node *handle_assume_compare(dbg_info *dbi,
2136 const binary_expression_t *expression)
2138 expression_t *op1 = expression->left;
2139 expression_t *op2 = expression->right;
2140 entity_t *var2, *var = NULL;
2141 ir_node *res = NULL;
2144 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2146 if (is_local_variable(op1) && is_local_variable(op2)) {
2147 var = op1->reference.entity;
2148 var2 = op2->reference.entity;
2150 type_t *const type = skip_typeref(var->declaration.type);
2151 ir_mode *const mode = get_ir_mode_storage(type);
2153 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2154 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2156 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2157 set_value(var2->variable.v.value_number, res);
2159 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2160 set_value(var->variable.v.value_number, res);
2166 if (is_local_variable(op1) && is_constant_expression(op2)) {
2167 var = op1->reference.entity;
2169 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2170 cmp_val = get_inversed_pnc(cmp_val);
2171 var = op2->reference.entity;
2176 type_t *const type = skip_typeref(var->declaration.type);
2177 ir_mode *const mode = get_ir_mode_storage(type);
2179 res = get_value(var->variable.v.value_number, mode);
2180 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2181 set_value(var->variable.v.value_number, res);
2187 * Handle the assume optimizer hint.
2189 * @param dbi debug info
2190 * @param expr the IL assume expression
2192 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2193 switch(expression->kind) {
2194 case EXPR_BINARY_EQUAL:
2195 case EXPR_BINARY_NOTEQUAL:
2196 case EXPR_BINARY_LESS:
2197 case EXPR_BINARY_LESSEQUAL:
2198 case EXPR_BINARY_GREATER:
2199 case EXPR_BINARY_GREATEREQUAL:
2200 return handle_assume_compare(dbi, &expression->binary);
2206 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2208 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2209 type_t *type = skip_typeref(expression->base.type);
2211 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2212 return expression_to_addr(expression->value);
2214 const expression_t *value = expression->value;
2216 switch(expression->base.kind) {
2217 case EXPR_UNARY_NEGATE: {
2218 ir_node *value_node = expression_to_firm(value);
2219 ir_mode *mode = get_ir_mode_arithmetic(type);
2220 return new_d_Minus(dbgi, value_node, mode);
2222 case EXPR_UNARY_PLUS:
2223 return expression_to_firm(value);
2224 case EXPR_UNARY_BITWISE_NEGATE: {
2225 ir_node *value_node = expression_to_firm(value);
2226 ir_mode *mode = get_ir_mode_arithmetic(type);
2227 return new_d_Not(dbgi, value_node, mode);
2229 case EXPR_UNARY_NOT: {
2230 ir_node *value_node = _expression_to_firm(value);
2231 value_node = create_conv(dbgi, value_node, mode_b);
2232 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2235 case EXPR_UNARY_DEREFERENCE: {
2236 ir_node *value_node = expression_to_firm(value);
2237 type_t *value_type = skip_typeref(value->base.type);
2238 assert(is_type_pointer(value_type));
2239 type_t *points_to = value_type->pointer.points_to;
2240 return deref_address(dbgi, points_to, value_node);
2242 case EXPR_UNARY_POSTFIX_INCREMENT:
2243 case EXPR_UNARY_POSTFIX_DECREMENT:
2244 case EXPR_UNARY_PREFIX_INCREMENT:
2245 case EXPR_UNARY_PREFIX_DECREMENT:
2246 return create_incdec(expression);
2247 case EXPR_UNARY_CAST: {
2248 ir_node *value_node = expression_to_firm(value);
2249 if (is_type_scalar(type)) {
2250 ir_mode *mode = get_ir_mode_storage(type);
2251 ir_node *node = create_conv(dbgi, value_node, mode);
2252 node = do_strict_conv(dbgi, node);
2253 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2254 node = create_conv(dbgi, node, mode_arith);
2257 /* make sure firm type is constructed */
2258 (void) get_ir_type(type);
2262 case EXPR_UNARY_CAST_IMPLICIT: {
2263 ir_node *value_node = expression_to_firm(value);
2264 if (is_type_scalar(type)) {
2265 ir_mode *mode = get_ir_mode_storage(type);
2266 ir_node *res = create_conv(dbgi, value_node, mode);
2267 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2268 res = create_conv(dbgi, res, mode_arith);
2274 case EXPR_UNARY_ASSUME:
2275 if (firm_opt.confirm)
2276 return handle_assume(dbgi, value);
2283 panic("invalid UNEXPR type found");
2287 * produces a 0/1 depending of the value of a mode_b node
2289 static ir_node *produce_condition_result(const expression_t *expression,
2290 ir_mode *mode, dbg_info *dbgi)
2292 ir_node *cur_block = get_cur_block();
2294 ir_node *one_block = new_immBlock();
2295 set_cur_block(one_block);
2296 ir_node *one = new_Const(get_mode_one(mode));
2297 ir_node *jmp_one = new_d_Jmp(dbgi);
2299 ir_node *zero_block = new_immBlock();
2300 set_cur_block(zero_block);
2301 ir_node *zero = new_Const(get_mode_null(mode));
2302 ir_node *jmp_zero = new_d_Jmp(dbgi);
2304 set_cur_block(cur_block);
2305 create_condition_evaluation(expression, one_block, zero_block);
2306 mature_immBlock(one_block);
2307 mature_immBlock(zero_block);
2309 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2310 new_Block(2, in_cf);
2312 ir_node *in[2] = { one, zero };
2313 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2318 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2319 ir_node *value, type_t *type)
2321 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2322 assert(is_type_pointer(type));
2323 pointer_type_t *const pointer_type = &type->pointer;
2324 type_t *const points_to = skip_typeref(pointer_type->points_to);
2325 unsigned elem_size = get_type_size_const(points_to);
2327 value = create_conv(dbgi, value, mode);
2329 /* gcc extension: allow arithmetic with void * and function * */
2330 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2331 is_type_function(points_to)) {
2335 assert(elem_size >= 1);
2339 ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2340 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode);
2344 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2345 ir_node *left, ir_node *right)
2348 type_t *type_left = skip_typeref(expression->left->base.type);
2349 type_t *type_right = skip_typeref(expression->right->base.type);
2351 expression_kind_t kind = expression->base.kind;
2354 case EXPR_BINARY_SHIFTLEFT:
2355 case EXPR_BINARY_SHIFTRIGHT:
2356 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2357 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2358 mode = get_irn_mode(left);
2359 right = create_conv(dbgi, right, mode_uint);
2362 case EXPR_BINARY_SUB:
2363 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2364 const pointer_type_t *const ptr_type = &type_left->pointer;
2366 mode = get_ir_mode_arithmetic(expression->base.type);
2367 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2368 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2369 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2370 ir_node *const no_mem = new_NoMem();
2371 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2372 mode, op_pin_state_floats);
2373 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2376 case EXPR_BINARY_SUB_ASSIGN:
2377 if (is_type_pointer(type_left)) {
2378 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2379 mode = get_ir_mode_arithmetic(type_left);
2384 case EXPR_BINARY_ADD:
2385 case EXPR_BINARY_ADD_ASSIGN:
2386 if (is_type_pointer(type_left)) {
2387 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2388 mode = get_ir_mode_arithmetic(type_left);
2390 } else if (is_type_pointer(type_right)) {
2391 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2392 mode = get_ir_mode_arithmetic(type_right);
2399 mode = get_ir_mode_arithmetic(type_right);
2400 left = create_conv(dbgi, left, mode);
2405 case EXPR_BINARY_ADD_ASSIGN:
2406 case EXPR_BINARY_ADD:
2407 return new_d_Add(dbgi, left, right, mode);
2408 case EXPR_BINARY_SUB_ASSIGN:
2409 case EXPR_BINARY_SUB:
2410 return new_d_Sub(dbgi, left, right, mode);
2411 case EXPR_BINARY_MUL_ASSIGN:
2412 case EXPR_BINARY_MUL:
2413 return new_d_Mul(dbgi, left, right, mode);
2414 case EXPR_BINARY_BITWISE_AND:
2415 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2416 return new_d_And(dbgi, left, right, mode);
2417 case EXPR_BINARY_BITWISE_OR:
2418 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2419 return new_d_Or(dbgi, left, right, mode);
2420 case EXPR_BINARY_BITWISE_XOR:
2421 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2422 return new_d_Eor(dbgi, left, right, mode);
2423 case EXPR_BINARY_SHIFTLEFT:
2424 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2425 return new_d_Shl(dbgi, left, right, mode);
2426 case EXPR_BINARY_SHIFTRIGHT:
2427 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2428 if (mode_is_signed(mode)) {
2429 return new_d_Shrs(dbgi, left, right, mode);
2431 return new_d_Shr(dbgi, left, right, mode);
2433 case EXPR_BINARY_DIV:
2434 case EXPR_BINARY_DIV_ASSIGN: {
2435 ir_node *pin = new_Pin(new_NoMem());
2438 if (mode_is_float(mode)) {
2439 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2440 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2442 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2443 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2447 case EXPR_BINARY_MOD:
2448 case EXPR_BINARY_MOD_ASSIGN: {
2449 ir_node *pin = new_Pin(new_NoMem());
2450 assert(!mode_is_float(mode));
2451 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2452 op_pin_state_floats);
2453 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2457 panic("unexpected expression kind");
2461 static ir_node *create_lazy_op(const binary_expression_t *expression)
2463 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2464 type_t *type = skip_typeref(expression->base.type);
2465 ir_mode *mode = get_ir_mode_arithmetic(type);
2467 if (is_constant_expression(expression->left)) {
2468 long val = fold_constant(expression->left);
2469 expression_kind_t ekind = expression->base.kind;
2470 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2471 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2473 return new_Const(get_mode_null(mode));
2477 return new_Const(get_mode_one(mode));
2481 if (is_constant_expression(expression->right)) {
2482 long const valr = fold_constant(expression->right);
2484 new_Const(get_mode_one(mode)) :
2485 new_Const(get_mode_null(mode));
2488 return produce_condition_result(expression->right, mode, dbgi);
2491 return produce_condition_result((const expression_t*) expression, mode,
2495 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2496 ir_node *right, ir_mode *mode);
2498 static ir_node *create_assign_binop(const binary_expression_t *expression)
2500 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2501 const expression_t *left_expr = expression->left;
2502 type_t *type = skip_typeref(left_expr->base.type);
2503 ir_mode *left_mode = get_ir_mode_storage(type);
2504 ir_node *right = expression_to_firm(expression->right);
2505 ir_node *left_addr = expression_to_addr(left_expr);
2506 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2507 ir_node *result = create_op(dbgi, expression, left, right);
2509 result = create_conv(dbgi, result, left_mode);
2510 result = do_strict_conv(dbgi, result);
2512 result = set_value_for_expression_addr(left_expr, result, left_addr);
2514 if (!is_type_compound(type)) {
2515 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2516 result = create_conv(dbgi, result, mode_arithmetic);
2521 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2523 expression_kind_t kind = expression->base.kind;
2526 case EXPR_BINARY_EQUAL:
2527 case EXPR_BINARY_NOTEQUAL:
2528 case EXPR_BINARY_LESS:
2529 case EXPR_BINARY_LESSEQUAL:
2530 case EXPR_BINARY_GREATER:
2531 case EXPR_BINARY_GREATEREQUAL:
2532 case EXPR_BINARY_ISGREATER:
2533 case EXPR_BINARY_ISGREATEREQUAL:
2534 case EXPR_BINARY_ISLESS:
2535 case EXPR_BINARY_ISLESSEQUAL:
2536 case EXPR_BINARY_ISLESSGREATER:
2537 case EXPR_BINARY_ISUNORDERED: {
2538 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2539 ir_node *left = expression_to_firm(expression->left);
2540 ir_node *right = expression_to_firm(expression->right);
2541 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2542 long pnc = get_pnc(kind, expression->left->base.type);
2543 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2546 case EXPR_BINARY_ASSIGN: {
2547 ir_node *addr = expression_to_addr(expression->left);
2548 ir_node *right = expression_to_firm(expression->right);
2550 = set_value_for_expression_addr(expression->left, right, addr);
2552 type_t *type = skip_typeref(expression->base.type);
2553 if (!is_type_compound(type)) {
2554 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2555 res = create_conv(NULL, res, mode_arithmetic);
2559 case EXPR_BINARY_ADD:
2560 case EXPR_BINARY_SUB:
2561 case EXPR_BINARY_MUL:
2562 case EXPR_BINARY_DIV:
2563 case EXPR_BINARY_MOD:
2564 case EXPR_BINARY_BITWISE_AND:
2565 case EXPR_BINARY_BITWISE_OR:
2566 case EXPR_BINARY_BITWISE_XOR:
2567 case EXPR_BINARY_SHIFTLEFT:
2568 case EXPR_BINARY_SHIFTRIGHT:
2570 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2571 ir_node *left = expression_to_firm(expression->left);
2572 ir_node *right = expression_to_firm(expression->right);
2573 return create_op(dbgi, expression, left, right);
2575 case EXPR_BINARY_LOGICAL_AND:
2576 case EXPR_BINARY_LOGICAL_OR:
2577 return create_lazy_op(expression);
2578 case EXPR_BINARY_COMMA:
2579 /* create side effects of left side */
2580 (void) expression_to_firm(expression->left);
2581 return _expression_to_firm(expression->right);
2583 case EXPR_BINARY_ADD_ASSIGN:
2584 case EXPR_BINARY_SUB_ASSIGN:
2585 case EXPR_BINARY_MUL_ASSIGN:
2586 case EXPR_BINARY_MOD_ASSIGN:
2587 case EXPR_BINARY_DIV_ASSIGN:
2588 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2589 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2590 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2591 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2592 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2593 return create_assign_binop(expression);
2595 panic("TODO binexpr type");
2599 static ir_node *array_access_addr(const array_access_expression_t *expression)
2601 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2602 ir_node *base_addr = expression_to_firm(expression->array_ref);
2603 ir_node *offset = expression_to_firm(expression->index);
2604 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2605 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2606 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2611 static ir_node *array_access_to_firm(
2612 const array_access_expression_t *expression)
2614 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2615 ir_node *addr = array_access_addr(expression);
2616 type_t *type = revert_automatic_type_conversion(
2617 (const expression_t*) expression);
2618 type = skip_typeref(type);
2620 return deref_address(dbgi, type, addr);
2623 static long get_offsetof_offset(const offsetof_expression_t *expression)
2625 type_t *orig_type = expression->type;
2628 designator_t *designator = expression->designator;
2629 for ( ; designator != NULL; designator = designator->next) {
2630 type_t *type = skip_typeref(orig_type);
2631 /* be sure the type is constructed */
2632 (void) get_ir_type(type);
2634 if (designator->symbol != NULL) {
2635 assert(is_type_compound(type));
2636 symbol_t *symbol = designator->symbol;
2638 compound_t *compound = type->compound.compound;
2639 entity_t *iter = compound->members.entities;
2640 for ( ; iter != NULL; iter = iter->base.next) {
2641 if (iter->base.symbol == symbol) {
2645 assert(iter != NULL);
2647 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2648 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2649 offset += get_entity_offset(iter->compound_member.entity);
2651 orig_type = iter->declaration.type;
2653 expression_t *array_index = designator->array_index;
2654 assert(designator->array_index != NULL);
2655 assert(is_type_array(type));
2657 long index = fold_constant(array_index);
2658 ir_type *arr_type = get_ir_type(type);
2659 ir_type *elem_type = get_array_element_type(arr_type);
2660 long elem_size = get_type_size_bytes(elem_type);
2662 offset += index * elem_size;
2664 orig_type = type->array.element_type;
2671 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2673 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2674 long offset = get_offsetof_offset(expression);
2675 tarval *tv = new_tarval_from_long(offset, mode);
2676 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2678 return new_d_Const(dbgi, tv);
2681 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2682 ir_entity *entity, type_t *type);
2684 static ir_node *compound_literal_to_firm(
2685 const compound_literal_expression_t *expression)
2687 type_t *type = expression->type;
2689 /* create an entity on the stack */
2690 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2692 ident *const id = id_unique("CompLit.%u");
2693 ir_type *const irtype = get_ir_type(type);
2694 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2695 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2696 set_entity_ld_ident(entity, id);
2698 set_entity_variability(entity, variability_uninitialized);
2700 /* create initialisation code */
2701 initializer_t *initializer = expression->initializer;
2702 create_local_initializer(initializer, dbgi, entity, type);
2704 /* create a sel for the compound literal address */
2705 ir_node *frame = get_local_frame(entity);
2706 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2711 * Transform a sizeof expression into Firm code.
2713 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2715 type_t *type = expression->type;
2717 type = expression->tp_expression->base.type;
2718 assert(type != NULL);
2721 type = skip_typeref(type);
2722 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2723 if (is_type_array(type) && type->array.is_vla
2724 && expression->tp_expression != NULL) {
2725 expression_to_firm(expression->tp_expression);
2728 return get_type_size(type);
2731 static entity_t *get_expression_entity(const expression_t *expression)
2733 if (expression->kind != EXPR_REFERENCE)
2736 return expression->reference.entity;
2740 * Transform an alignof expression into Firm code.
2742 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2746 const expression_t *tp_expression = expression->tp_expression;
2747 entity_t *entity = get_expression_entity(tp_expression);
2748 ir_entity *irentity = NULL;
2750 if (entity != NULL && is_declaration(entity)) {
2751 switch (entity->declaration.kind) {
2752 case DECLARATION_KIND_UNKNOWN:
2753 panic("unknown entity reference found");
2754 case DECLARATION_KIND_COMPOUND_MEMBER:
2755 irentity = entity->compound_member.entity;
2757 case DECLARATION_KIND_GLOBAL_VARIABLE:
2758 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
2759 irentity = entity->variable.v.entity;
2761 case DECLARATION_KIND_PARAMETER_ENTITY:
2762 irentity = entity->parameter.v.entity;
2764 case DECLARATION_KIND_FUNCTION:
2765 case DECLARATION_KIND_INNER_FUNCTION:
2766 irentity = entity->function.entity;
2768 case DECLARATION_KIND_PARAMETER:
2769 case DECLARATION_KIND_LOCAL_VARIABLE:
2770 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
2775 if (irentity != NULL) {
2776 irtype = get_entity_type(irentity);
2778 type_t *type = expression->type;
2779 irtype = get_ir_type(type);
2782 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2783 symconst_symbol sym;
2784 sym.type_p = irtype;
2785 return new_SymConst(mode, sym, symconst_type_align);
2788 static void init_ir_types(void);
2790 long fold_constant(const expression_t *expression)
2792 assert(is_type_valid(skip_typeref(expression->base.type)));
2794 bool constant_folding_old = constant_folding;
2795 constant_folding = true;
2799 assert(is_constant_expression(expression));
2801 ir_graph *old_current_ir_graph = current_ir_graph;
2802 current_ir_graph = get_const_code_irg();
2804 ir_node *cnst = expression_to_firm(expression);
2805 current_ir_graph = old_current_ir_graph;
2807 if (!is_Const(cnst)) {
2808 panic("couldn't fold constant");
2811 tarval *tv = get_Const_tarval(cnst);
2812 if (!tarval_is_long(tv)) {
2813 panic("result of constant folding is not integer");
2816 constant_folding = constant_folding_old;
2818 return get_tarval_long(tv);
2821 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2823 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2825 /* first try to fold a constant condition */
2826 if (is_constant_expression(expression->condition)) {
2827 long val = fold_constant(expression->condition);
2829 expression_t *true_expression = expression->true_expression;
2830 if (true_expression == NULL)
2831 true_expression = expression->condition;
2832 return expression_to_firm(true_expression);
2834 return expression_to_firm(expression->false_expression);
2838 ir_node *cur_block = get_cur_block();
2840 /* create the true block */
2841 ir_node *true_block = new_immBlock();
2842 set_cur_block(true_block);
2844 ir_node *true_val = expression->true_expression != NULL ?
2845 expression_to_firm(expression->true_expression) : NULL;
2846 ir_node *true_jmp = new_Jmp();
2848 /* create the false block */
2849 ir_node *false_block = new_immBlock();
2850 set_cur_block(false_block);
2852 ir_node *false_val = expression_to_firm(expression->false_expression);
2853 ir_node *false_jmp = new_Jmp();
2855 /* create the condition evaluation */
2856 set_cur_block(cur_block);
2857 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2858 if (expression->true_expression == NULL) {
2859 if (cond_expr != NULL) {
2860 true_val = cond_expr;
2862 /* Condition ended with a short circuit (&&, ||, !) operation.
2863 * Generate a "1" as value for the true branch. */
2864 true_val = new_Const(get_mode_one(mode_Is));
2867 mature_immBlock(true_block);
2868 mature_immBlock(false_block);
2870 /* create the common block */
2871 ir_node *in_cf[2] = { true_jmp, false_jmp };
2872 new_Block(2, in_cf);
2874 /* TODO improve static semantics, so either both or no values are NULL */
2875 if (true_val == NULL || false_val == NULL)
2878 ir_node *in[2] = { true_val, false_val };
2879 ir_mode *mode = get_irn_mode(true_val);
2880 assert(get_irn_mode(false_val) == mode);
2881 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2887 * Returns an IR-node representing the address of a field.
2889 static ir_node *select_addr(const select_expression_t *expression)
2891 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2893 construct_select_compound(expression);
2895 ir_node *compound_addr = expression_to_firm(expression->compound);
2897 entity_t *entry = expression->compound_entry;
2898 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2899 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2901 if (constant_folding) {
2902 ir_mode *mode = get_irn_mode(compound_addr);
2903 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2904 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2905 return new_d_Add(dbgi, compound_addr, ofs, mode);
2907 ir_entity *irentity = entry->compound_member.entity;
2908 assert(irentity != NULL);
2909 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2913 static ir_node *select_to_firm(const select_expression_t *expression)
2915 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2916 ir_node *addr = select_addr(expression);
2917 type_t *type = revert_automatic_type_conversion(
2918 (const expression_t*) expression);
2919 type = skip_typeref(type);
2921 entity_t *entry = expression->compound_entry;
2922 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2923 type_t *entry_type = skip_typeref(entry->declaration.type);
2925 if (entry_type->kind == TYPE_BITFIELD) {
2926 return bitfield_extract_to_firm(expression, addr);
2929 return deref_address(dbgi, type, addr);
2932 /* Values returned by __builtin_classify_type. */
2933 typedef enum gcc_type_class
2939 enumeral_type_class,
2942 reference_type_class,
2946 function_type_class,
2957 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2959 type_t *type = expr->type_expression->base.type;
2961 /* FIXME gcc returns different values depending on whether compiling C or C++
2962 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2965 type = skip_typeref(type);
2966 switch (type->kind) {
2968 const atomic_type_t *const atomic_type = &type->atomic;
2969 switch (atomic_type->akind) {
2970 /* should not be reached */
2971 case ATOMIC_TYPE_INVALID:
2975 /* gcc cannot do that */
2976 case ATOMIC_TYPE_VOID:
2977 tc = void_type_class;
2980 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2981 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2982 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2983 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2984 case ATOMIC_TYPE_SHORT:
2985 case ATOMIC_TYPE_USHORT:
2986 case ATOMIC_TYPE_INT:
2987 case ATOMIC_TYPE_UINT:
2988 case ATOMIC_TYPE_LONG:
2989 case ATOMIC_TYPE_ULONG:
2990 case ATOMIC_TYPE_LONGLONG:
2991 case ATOMIC_TYPE_ULONGLONG:
2992 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2993 tc = integer_type_class;
2996 case ATOMIC_TYPE_FLOAT:
2997 case ATOMIC_TYPE_DOUBLE:
2998 case ATOMIC_TYPE_LONG_DOUBLE:
2999 tc = real_type_class;
3002 panic("Unexpected atomic type in classify_type_to_firm().");
3005 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3006 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3007 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
3008 case TYPE_ARRAY: /* gcc handles this as pointer */
3009 case TYPE_FUNCTION: /* gcc handles this as pointer */
3010 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3011 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3012 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3014 /* gcc handles this as integer */
3015 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3017 /* gcc classifies the referenced type */
3018 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3021 /* typedef/typeof should be skipped already */
3028 panic("unexpected TYPE classify_type_to_firm().");
3032 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3033 tarval *const tv = new_tarval_from_long(tc, mode_int);
3034 return new_d_Const(dbgi, tv);
3037 static ir_node *function_name_to_firm(
3038 const funcname_expression_t *const expr)
3040 switch(expr->kind) {
3041 case FUNCNAME_FUNCTION:
3042 case FUNCNAME_PRETTY_FUNCTION:
3043 case FUNCNAME_FUNCDNAME:
3044 if (current_function_name == NULL) {
3045 const source_position_t *const src_pos = &expr->base.source_position;
3046 const char *name = current_function_entity->base.symbol->string;
3047 const string_t string = { name, strlen(name) + 1 };
3048 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3050 return current_function_name;
3051 case FUNCNAME_FUNCSIG:
3052 if (current_funcsig == NULL) {
3053 const source_position_t *const src_pos = &expr->base.source_position;
3054 ir_entity *ent = get_irg_entity(current_ir_graph);
3055 const char *const name = get_entity_ld_name(ent);
3056 const string_t string = { name, strlen(name) + 1 };
3057 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3059 return current_funcsig;
3061 panic("Unsupported function name");
3064 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3066 statement_t *statement = expr->statement;
3068 assert(statement->kind == STATEMENT_COMPOUND);
3069 return compound_statement_to_firm(&statement->compound);
3072 static ir_node *va_start_expression_to_firm(
3073 const va_start_expression_t *const expr)
3075 type_t *const type = current_function_entity->declaration.type;
3076 ir_type *const method_type = get_ir_type(type);
3077 int const n = get_method_n_params(method_type) - 1;
3078 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
3079 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
3080 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3081 ir_node *const no_mem = new_NoMem();
3082 ir_node *const arg_sel =
3083 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3085 ir_node *const cnst = get_type_size(expr->parameter->base.type);
3086 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3087 set_value_for_expression(expr->ap, add);
3092 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3094 type_t *const type = expr->base.type;
3095 expression_t *const ap_expr = expr->ap;
3096 ir_node *const ap_addr = expression_to_addr(ap_expr);
3097 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3098 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3099 ir_node *const res = deref_address(dbgi, type, ap);
3101 ir_node *const cnst = get_type_size(expr->base.type);
3102 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
3104 set_value_for_expression_addr(ap_expr, add, ap_addr);
3109 static ir_node *dereference_addr(const unary_expression_t *const expression)
3111 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3112 return expression_to_firm(expression->value);
3116 * Returns a IR-node representing an lvalue of the given expression.
3118 static ir_node *expression_to_addr(const expression_t *expression)
3120 switch(expression->kind) {
3121 case EXPR_ARRAY_ACCESS:
3122 return array_access_addr(&expression->array_access);
3124 return call_expression_to_firm(&expression->call);
3125 case EXPR_COMPOUND_LITERAL:
3126 return compound_literal_to_firm(&expression->compound_literal);
3127 case EXPR_REFERENCE:
3128 return reference_addr(&expression->reference);
3130 return select_addr(&expression->select);
3131 case EXPR_UNARY_DEREFERENCE:
3132 return dereference_addr(&expression->unary);
3136 panic("trying to get address of non-lvalue");
3139 static ir_node *builtin_constant_to_firm(
3140 const builtin_constant_expression_t *expression)
3142 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3145 if (is_constant_expression(expression->value)) {
3150 return new_Const_long(mode, v);
3153 static ir_node *builtin_prefetch_to_firm(
3154 const builtin_prefetch_expression_t *expression)
3156 ir_node *adr = expression_to_firm(expression->adr);
3157 /* no Firm support for prefetch yet */
3162 static ir_node *get_label_block(label_t *label)
3164 if (label->block != NULL)
3165 return label->block;
3167 /* beware: might be called from create initializer with current_ir_graph
3168 * set to const_code_irg. */
3169 ir_graph *rem = current_ir_graph;
3170 current_ir_graph = current_function;
3172 ir_node *block = new_immBlock();
3174 label->block = block;
3176 ARR_APP1(label_t *, all_labels, label);
3178 current_ir_graph = rem;
3183 * Pointer to a label. This is used for the
3184 * GNU address-of-label extension.
3186 static ir_node *label_address_to_firm(
3187 const label_address_expression_t *label)
3189 ir_node *block = get_label_block(label->label);
3190 ir_label_t nr = get_Block_label(block);
3193 nr = get_irp_next_label_nr();
3194 set_Block_label(block, nr);
3196 symconst_symbol value;
3198 return new_SymConst(mode_P_code, value, symconst_label);
3201 static ir_node *builtin_symbol_to_firm(
3202 const builtin_symbol_expression_t *expression)
3204 /* for gcc compatibility we have to produce (dummy) addresses for some
3206 if (warning.other) {
3207 warningf(&expression->base.source_position,
3208 "taking address of builtin '%Y'", expression->symbol);
3211 /* simply create a NULL pointer */
3212 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
3213 ir_node *res = new_Const_long(mode, 0);
3219 * creates firm nodes for an expression. The difference between this function
3220 * and expression_to_firm is, that this version might produce mode_b nodes
3221 * instead of mode_Is.
3223 static ir_node *_expression_to_firm(const expression_t *expression)
3226 if (!constant_folding) {
3227 assert(!expression->base.transformed);
3228 ((expression_t*) expression)->base.transformed = true;
3232 switch (expression->kind) {
3233 case EXPR_CHARACTER_CONSTANT:
3234 return character_constant_to_firm(&expression->conste);
3235 case EXPR_WIDE_CHARACTER_CONSTANT:
3236 return wide_character_constant_to_firm(&expression->conste);
3238 return const_to_firm(&expression->conste);
3239 case EXPR_STRING_LITERAL:
3240 return string_literal_to_firm(&expression->string);
3241 case EXPR_WIDE_STRING_LITERAL:
3242 return wide_string_literal_to_firm(&expression->wide_string);
3243 case EXPR_REFERENCE:
3244 return reference_expression_to_firm(&expression->reference);
3245 case EXPR_REFERENCE_ENUM_VALUE:
3246 return reference_expression_enum_value_to_firm(&expression->reference);
3248 return call_expression_to_firm(&expression->call);
3250 return unary_expression_to_firm(&expression->unary);
3252 return binary_expression_to_firm(&expression->binary);
3253 case EXPR_ARRAY_ACCESS:
3254 return array_access_to_firm(&expression->array_access);
3256 return sizeof_to_firm(&expression->typeprop);
3258 return alignof_to_firm(&expression->typeprop);
3259 case EXPR_CONDITIONAL:
3260 return conditional_to_firm(&expression->conditional);
3262 return select_to_firm(&expression->select);
3263 case EXPR_CLASSIFY_TYPE:
3264 return classify_type_to_firm(&expression->classify_type);
3266 return function_name_to_firm(&expression->funcname);
3267 case EXPR_STATEMENT:
3268 return statement_expression_to_firm(&expression->statement);
3270 return va_start_expression_to_firm(&expression->va_starte);
3272 return va_arg_expression_to_firm(&expression->va_arge);
3273 case EXPR_BUILTIN_SYMBOL:
3274 return builtin_symbol_to_firm(&expression->builtin_symbol);
3275 case EXPR_BUILTIN_CONSTANT_P:
3276 return builtin_constant_to_firm(&expression->builtin_constant);
3277 case EXPR_BUILTIN_PREFETCH:
3278 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3280 return offsetof_to_firm(&expression->offsetofe);
3281 case EXPR_COMPOUND_LITERAL:
3282 return compound_literal_to_firm(&expression->compound_literal);
3283 case EXPR_LABEL_ADDRESS:
3284 return label_address_to_firm(&expression->label_address);
3290 panic("invalid expression found");
3293 static bool is_builtin_expect(const expression_t *expression)
3295 if (expression->kind != EXPR_CALL)
3298 expression_t *function = expression->call.function;
3299 if (function->kind != EXPR_BUILTIN_SYMBOL)
3301 if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3307 static bool produces_mode_b(const expression_t *expression)
3309 switch (expression->kind) {
3310 case EXPR_BINARY_EQUAL:
3311 case EXPR_BINARY_NOTEQUAL:
3312 case EXPR_BINARY_LESS:
3313 case EXPR_BINARY_LESSEQUAL:
3314 case EXPR_BINARY_GREATER:
3315 case EXPR_BINARY_GREATEREQUAL:
3316 case EXPR_BINARY_ISGREATER:
3317 case EXPR_BINARY_ISGREATEREQUAL:
3318 case EXPR_BINARY_ISLESS:
3319 case EXPR_BINARY_ISLESSEQUAL:
3320 case EXPR_BINARY_ISLESSGREATER:
3321 case EXPR_BINARY_ISUNORDERED:
3322 case EXPR_UNARY_NOT:
3326 if (is_builtin_expect(expression)) {
3327 expression_t *argument = expression->call.arguments->expression;
3328 return produces_mode_b(argument);
3331 case EXPR_BINARY_COMMA:
3332 return produces_mode_b(expression->binary.right);
3339 static ir_node *expression_to_firm(const expression_t *expression)
3341 if (!produces_mode_b(expression)) {
3342 ir_node *res = _expression_to_firm(expression);
3343 assert(res == NULL || get_irn_mode(res) != mode_b);
3347 if (is_constant_expression(expression)) {
3348 ir_node *res = _expression_to_firm(expression);
3349 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3350 assert(is_Const(res));
3351 if (is_Const_null(res)) {
3352 return new_Const_long(mode, 0);
3354 return new_Const_long(mode, 1);
3358 /* we have to produce a 0/1 from the mode_b expression */
3359 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3360 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3361 return produce_condition_result(expression, mode, dbgi);
3365 * create a short-circuit expression evaluation that tries to construct
3366 * efficient control flow structures for &&, || and ! expressions
3368 static ir_node *create_condition_evaluation(const expression_t *expression,
3369 ir_node *true_block,
3370 ir_node *false_block)
3372 switch(expression->kind) {
3373 case EXPR_UNARY_NOT: {
3374 const unary_expression_t *unary_expression = &expression->unary;
3375 create_condition_evaluation(unary_expression->value, false_block,
3379 case EXPR_BINARY_LOGICAL_AND: {
3380 const binary_expression_t *binary_expression = &expression->binary;
3382 ir_node *extra_block = new_immBlock();
3383 create_condition_evaluation(binary_expression->left, extra_block,
3385 mature_immBlock(extra_block);
3386 set_cur_block(extra_block);
3387 create_condition_evaluation(binary_expression->right, true_block,
3391 case EXPR_BINARY_LOGICAL_OR: {
3392 const binary_expression_t *binary_expression = &expression->binary;
3394 ir_node *extra_block = new_immBlock();
3395 create_condition_evaluation(binary_expression->left, true_block,
3397 mature_immBlock(extra_block);
3398 set_cur_block(extra_block);
3399 create_condition_evaluation(binary_expression->right, true_block,
3407 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3408 ir_node *cond_expr = _expression_to_firm(expression);
3409 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3410 ir_node *cond = new_d_Cond(dbgi, condition);
3411 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3412 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3414 /* set branch prediction info based on __builtin_expect */
3415 if (is_builtin_expect(expression)) {
3416 call_argument_t *argument = expression->call.arguments->next;
3417 if (is_constant_expression(argument->expression)) {
3418 long cnst = fold_constant(argument->expression);
3419 cond_jmp_predicate pred;
3422 pred = COND_JMP_PRED_FALSE;
3424 pred = COND_JMP_PRED_TRUE;
3426 set_Cond_jmp_pred(cond, pred);
3430 add_immBlock_pred(true_block, true_proj);
3431 add_immBlock_pred(false_block, false_proj);
3433 set_cur_block(NULL);
3438 static void create_variable_entity(entity_t *variable,
3439 declaration_kind_t declaration_kind,
3440 ir_type *parent_type)
3442 assert(variable->kind == ENTITY_VARIABLE);
3443 type_t *type = skip_typeref(variable->declaration.type);
3444 type = get_aligned_type(type, variable->variable.alignment);
3446 ident *const id = new_id_from_str(variable->base.symbol->string);
3447 ir_type *const irtype = get_ir_type(type);
3448 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3450 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3452 handle_gnu_attributes_ent(irentity, variable);
3454 variable->declaration.kind = (unsigned char) declaration_kind;
3455 variable->variable.v.entity = irentity;
3456 set_entity_variability(irentity, variability_uninitialized);
3457 set_entity_ld_ident(irentity, create_ld_ident(variable));
3459 if (parent_type == get_tls_type())
3460 set_entity_allocation(irentity, allocation_automatic);
3461 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3462 set_entity_allocation(irentity, allocation_static);
3464 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3465 set_entity_volatility(irentity, volatility_is_volatile);
3470 typedef struct type_path_entry_t type_path_entry_t;
3471 struct type_path_entry_t {
3473 ir_initializer_t *initializer;
3475 entity_t *compound_entry;
3478 typedef struct type_path_t type_path_t;
3479 struct type_path_t {
3480 type_path_entry_t *path;
3485 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3487 size_t len = ARR_LEN(path->path);
3489 for (size_t i = 0; i < len; ++i) {
3490 const type_path_entry_t *entry = & path->path[i];
3492 type_t *type = skip_typeref(entry->type);
3493 if (is_type_compound(type)) {
3494 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3495 } else if (is_type_array(type)) {
3496 fprintf(stderr, "[%u]", (unsigned) entry->index);
3498 fprintf(stderr, "-INVALID-");
3501 fprintf(stderr, " (");
3502 print_type(path->top_type);
3503 fprintf(stderr, ")");
3506 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3508 size_t len = ARR_LEN(path->path);
3510 return & path->path[len-1];
3513 static type_path_entry_t *append_to_type_path(type_path_t *path)
3515 size_t len = ARR_LEN(path->path);
3516 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3518 type_path_entry_t *result = & path->path[len];
3519 memset(result, 0, sizeof(result[0]));
3523 static size_t get_compound_member_count(const compound_type_t *type)
3525 compound_t *compound = type->compound;
3526 size_t n_members = 0;
3527 entity_t *member = compound->members.entities;
3528 for ( ; member != NULL; member = member->base.next) {
3535 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3537 type_t *orig_top_type = path->top_type;
3538 type_t *top_type = skip_typeref(orig_top_type);
3540 assert(is_type_compound(top_type) || is_type_array(top_type));
3542 if (ARR_LEN(path->path) == 0) {
3545 type_path_entry_t *top = get_type_path_top(path);
3546 ir_initializer_t *initializer = top->initializer;
3547 return get_initializer_compound_value(initializer, top->index);
3551 static void descend_into_subtype(type_path_t *path)
3553 type_t *orig_top_type = path->top_type;
3554 type_t *top_type = skip_typeref(orig_top_type);
3556 assert(is_type_compound(top_type) || is_type_array(top_type));
3558 ir_initializer_t *initializer = get_initializer_entry(path);
3560 type_path_entry_t *top = append_to_type_path(path);
3561 top->type = top_type;
3565 if (is_type_compound(top_type)) {
3566 compound_t *compound = top_type->compound.compound;
3567 entity_t *entry = compound->members.entities;
3569 top->compound_entry = entry;
3571 len = get_compound_member_count(&top_type->compound);
3572 if (entry != NULL) {
3573 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3574 path->top_type = entry->declaration.type;
3577 assert(is_type_array(top_type));
3578 assert(top_type->array.size > 0);
3581 path->top_type = top_type->array.element_type;
3582 len = top_type->array.size;
3584 if (initializer == NULL
3585 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3586 initializer = create_initializer_compound(len);
3587 /* we have to set the entry at the 2nd latest path entry... */
3588 size_t path_len = ARR_LEN(path->path);
3589 assert(path_len >= 1);
3591 type_path_entry_t *entry = & path->path[path_len-2];
3592 ir_initializer_t *tinitializer = entry->initializer;
3593 set_initializer_compound_value(tinitializer, entry->index,
3597 top->initializer = initializer;
3600 static void ascend_from_subtype(type_path_t *path)
3602 type_path_entry_t *top = get_type_path_top(path);
3604 path->top_type = top->type;
3606 size_t len = ARR_LEN(path->path);
3607 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3610 static void walk_designator(type_path_t *path, const designator_t *designator)
3612 /* designators start at current object type */
3613 ARR_RESIZE(type_path_entry_t, path->path, 1);
3615 for ( ; designator != NULL; designator = designator->next) {
3616 type_path_entry_t *top = get_type_path_top(path);
3617 type_t *orig_type = top->type;
3618 type_t *type = skip_typeref(orig_type);
3620 if (designator->symbol != NULL) {
3621 assert(is_type_compound(type));
3623 symbol_t *symbol = designator->symbol;
3625 compound_t *compound = type->compound.compound;
3626 entity_t *iter = compound->members.entities;
3627 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3628 if (iter->base.symbol == symbol) {
3629 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3633 assert(iter != NULL);
3635 top->type = orig_type;
3636 top->compound_entry = iter;
3638 orig_type = iter->declaration.type;
3640 expression_t *array_index = designator->array_index;
3641 assert(designator->array_index != NULL);
3642 assert(is_type_array(type));
3644 long index = fold_constant(array_index);
3647 if (type->array.size_constant) {
3648 long array_size = type->array.size;
3649 assert(index < array_size);
3653 top->type = orig_type;
3654 top->index = (size_t) index;
3655 orig_type = type->array.element_type;
3657 path->top_type = orig_type;
3659 if (designator->next != NULL) {
3660 descend_into_subtype(path);
3664 path->invalid = false;
3667 static void advance_current_object(type_path_t *path)
3669 if (path->invalid) {
3670 /* TODO: handle this... */
3671 panic("invalid initializer in ast2firm (excessive elements)");
3674 type_path_entry_t *top = get_type_path_top(path);
3676 type_t *type = skip_typeref(top->type);
3677 if (is_type_union(type)) {
3678 top->compound_entry = NULL;
3679 } else if (is_type_struct(type)) {
3680 entity_t *entry = top->compound_entry;
3683 entry = entry->base.next;
3684 top->compound_entry = entry;
3685 if (entry != NULL) {
3686 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3687 path->top_type = entry->declaration.type;
3691 assert(is_type_array(type));
3694 if (!type->array.size_constant || top->index < type->array.size) {
3699 /* we're past the last member of the current sub-aggregate, try if we
3700 * can ascend in the type hierarchy and continue with another subobject */
3701 size_t len = ARR_LEN(path->path);
3704 ascend_from_subtype(path);
3705 advance_current_object(path);
3707 path->invalid = true;
3712 static ir_initializer_t *create_ir_initializer(
3713 const initializer_t *initializer, type_t *type);
3715 static ir_initializer_t *create_ir_initializer_value(
3716 const initializer_value_t *initializer)
3718 if (is_type_compound(initializer->value->base.type)) {
3719 panic("initializer creation for compounds not implemented yet");
3721 ir_node *value = expression_to_firm(initializer->value);
3722 type_t *type = initializer->value->base.type;
3723 ir_mode *mode = get_ir_mode_storage(type);
3724 value = create_conv(NULL, value, mode);
3725 return create_initializer_const(value);
3728 /** test wether type can be initialized by a string constant */
3729 static bool is_string_type(type_t *type)
3732 if (is_type_pointer(type)) {
3733 inner = skip_typeref(type->pointer.points_to);
3734 } else if(is_type_array(type)) {
3735 inner = skip_typeref(type->array.element_type);
3740 return is_type_integer(inner);
3743 static ir_initializer_t *create_ir_initializer_list(
3744 const initializer_list_t *initializer, type_t *type)
3747 memset(&path, 0, sizeof(path));
3748 path.top_type = type;
3749 path.path = NEW_ARR_F(type_path_entry_t, 0);
3751 descend_into_subtype(&path);
3753 for (size_t i = 0; i < initializer->len; ++i) {
3754 const initializer_t *sub_initializer = initializer->initializers[i];
3756 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3757 walk_designator(&path, sub_initializer->designator.designator);
3761 if (sub_initializer->kind == INITIALIZER_VALUE) {
3762 /* we might have to descend into types until we're at a scalar
3765 type_t *orig_top_type = path.top_type;
3766 type_t *top_type = skip_typeref(orig_top_type);
3768 if (is_type_scalar(top_type))
3770 descend_into_subtype(&path);
3772 } else if (sub_initializer->kind == INITIALIZER_STRING
3773 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3774 /* we might have to descend into types until we're at a scalar
3777 type_t *orig_top_type = path.top_type;
3778 type_t *top_type = skip_typeref(orig_top_type);
3780 if (is_string_type(top_type))
3782 descend_into_subtype(&path);
3786 ir_initializer_t *sub_irinitializer
3787 = create_ir_initializer(sub_initializer, path.top_type);
3789 size_t path_len = ARR_LEN(path.path);
3790 assert(path_len >= 1);
3791 type_path_entry_t *entry = & path.path[path_len-1];
3792 ir_initializer_t *tinitializer = entry->initializer;
3793 set_initializer_compound_value(tinitializer, entry->index,
3796 advance_current_object(&path);
3799 assert(ARR_LEN(path.path) >= 1);
3800 ir_initializer_t *result = path.path[0].initializer;
3801 DEL_ARR_F(path.path);
3806 static ir_initializer_t *create_ir_initializer_string(
3807 const initializer_string_t *initializer, type_t *type)
3809 type = skip_typeref(type);
3811 size_t string_len = initializer->string.size;
3812 assert(type->kind == TYPE_ARRAY);
3813 assert(type->array.size_constant);
3814 size_t len = type->array.size;
3815 ir_initializer_t *irinitializer = create_initializer_compound(len);
3817 const char *string = initializer->string.begin;
3818 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3820 for (size_t i = 0; i < len; ++i) {
3825 tarval *tv = new_tarval_from_long(c, mode);
3826 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3828 set_initializer_compound_value(irinitializer, i, char_initializer);
3831 return irinitializer;
3834 static ir_initializer_t *create_ir_initializer_wide_string(
3835 const initializer_wide_string_t *initializer, type_t *type)
3837 size_t string_len = initializer->string.size;
3838 assert(type->kind == TYPE_ARRAY);
3839 assert(type->array.size_constant);
3840 size_t len = type->array.size;
3841 ir_initializer_t *irinitializer = create_initializer_compound(len);
3843 const wchar_rep_t *string = initializer->string.begin;
3844 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3846 for (size_t i = 0; i < len; ++i) {
3848 if (i < string_len) {
3851 tarval *tv = new_tarval_from_long(c, mode);
3852 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3854 set_initializer_compound_value(irinitializer, i, char_initializer);
3857 return irinitializer;
3860 static ir_initializer_t *create_ir_initializer(
3861 const initializer_t *initializer, type_t *type)
3863 switch(initializer->kind) {
3864 case INITIALIZER_STRING:
3865 return create_ir_initializer_string(&initializer->string, type);
3867 case INITIALIZER_WIDE_STRING:
3868 return create_ir_initializer_wide_string(&initializer->wide_string,
3871 case INITIALIZER_LIST:
3872 return create_ir_initializer_list(&initializer->list, type);
3874 case INITIALIZER_VALUE:
3875 return create_ir_initializer_value(&initializer->value);
3877 case INITIALIZER_DESIGNATOR:
3878 panic("unexpected designator initializer found");
3880 panic("unknown initializer");
3883 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3886 if (is_atomic_type(type)) {
3887 ir_mode *mode = get_type_mode(type);
3888 tarval *zero = get_mode_null(mode);
3889 ir_node *cnst = new_d_Const(dbgi, zero);
3891 /* TODO: bitfields */
3892 ir_node *mem = get_store();
3893 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, 0);
3894 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3897 assert(is_compound_type(type));
3900 if (is_Array_type(type)) {
3901 assert(has_array_upper_bound(type, 0));
3902 n_members = get_array_upper_bound_int(type, 0);
3904 n_members = get_compound_n_members(type);
3907 for (int i = 0; i < n_members; ++i) {
3910 if (is_Array_type(type)) {
3911 ir_entity *entity = get_array_element_entity(type);
3912 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3913 ir_node *cnst = new_d_Const(dbgi, index_tv);
3914 ir_node *in[1] = { cnst };
3915 irtype = get_array_element_type(type);
3916 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3918 ir_entity *member = get_compound_member(type, i);
3920 irtype = get_entity_type(member);
3921 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3924 create_dynamic_null_initializer(irtype, dbgi, addr);
3929 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3930 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3932 switch(get_initializer_kind(initializer)) {
3933 case IR_INITIALIZER_NULL: {
3934 create_dynamic_null_initializer(type, dbgi, base_addr);
3937 case IR_INITIALIZER_CONST: {
3938 ir_node *node = get_initializer_const_value(initializer);
3939 ir_mode *mode = get_irn_mode(node);
3940 ir_type *ent_type = get_entity_type(entity);
3942 /* is it a bitfield type? */
3943 if (is_Primitive_type(ent_type) &&
3944 get_primitive_base_type(ent_type) != NULL) {
3945 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3949 assert(get_type_mode(type) == mode);
3950 ir_node *mem = get_store();
3951 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, 0);
3952 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3956 case IR_INITIALIZER_TARVAL: {
3957 tarval *tv = get_initializer_tarval_value(initializer);
3958 ir_mode *mode = get_tarval_mode(tv);
3959 ir_node *cnst = new_d_Const(dbgi, tv);
3960 ir_type *ent_type = get_entity_type(entity);
3962 /* is it a bitfield type? */
3963 if (is_Primitive_type(ent_type) &&
3964 get_primitive_base_type(ent_type) != NULL) {
3965 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3969 assert(get_type_mode(type) == mode);
3970 ir_node *mem = get_store();
3971 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, 0);
3972 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3976 case IR_INITIALIZER_COMPOUND: {
3977 assert(is_compound_type(type));
3979 if (is_Array_type(type)) {
3980 assert(has_array_upper_bound(type, 0));
3981 n_members = get_array_upper_bound_int(type, 0);
3983 n_members = get_compound_n_members(type);
3986 if (get_initializer_compound_n_entries(initializer)
3987 != (unsigned) n_members)
3988 panic("initializer doesn't match compound type");
3990 for (int i = 0; i < n_members; ++i) {
3993 ir_entity *sub_entity;
3994 if (is_Array_type(type)) {
3995 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3996 ir_node *cnst = new_d_Const(dbgi, index_tv);
3997 ir_node *in[1] = { cnst };
3998 irtype = get_array_element_type(type);
3999 sub_entity = get_array_element_entity(type);
4000 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4003 sub_entity = get_compound_member(type, i);
4004 irtype = get_entity_type(sub_entity);
4005 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4009 ir_initializer_t *sub_init
4010 = get_initializer_compound_value(initializer, i);
4012 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4019 panic("invalid IR_INITIALIZER found");
4022 static void create_dynamic_initializer(ir_initializer_t *initializer,
4023 dbg_info *dbgi, ir_entity *entity)
4025 ir_node *frame = get_local_frame(entity);
4026 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4027 ir_type *type = get_entity_type(entity);
4029 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4032 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4033 ir_entity *entity, type_t *type)
4035 ir_node *memory = get_store();
4036 ir_node *nomem = new_NoMem();
4037 ir_node *frame = get_irg_frame(current_ir_graph);
4038 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4040 if (initializer->kind == INITIALIZER_VALUE) {
4041 initializer_value_t *initializer_value = &initializer->value;
4043 ir_node *value = expression_to_firm(initializer_value->value);
4044 type = skip_typeref(type);
4045 assign_value(dbgi, addr, type, value);
4049 if (!is_constant_initializer(initializer)) {
4050 ir_initializer_t *irinitializer
4051 = create_ir_initializer(initializer, type);
4053 create_dynamic_initializer(irinitializer, dbgi, entity);
4057 /* create the ir_initializer */
4058 ir_graph *const old_current_ir_graph = current_ir_graph;
4059 current_ir_graph = get_const_code_irg();
4061 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4063 assert(current_ir_graph == get_const_code_irg());
4064 current_ir_graph = old_current_ir_graph;
4066 /* create a "template" entity which is copied to the entity on the stack */
4067 ident *const id = id_unique("initializer.%u");
4068 ir_type *const irtype = get_ir_type(type);
4069 ir_type *const global_type = get_glob_type();
4070 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4071 set_entity_ld_ident(init_entity, id);
4073 set_entity_variability(init_entity, variability_initialized);
4074 set_entity_visibility(init_entity, visibility_local);
4075 set_entity_allocation(init_entity, allocation_static);
4077 set_entity_initializer(init_entity, irinitializer);
4079 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4080 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4082 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4083 set_store(copyb_mem);
4086 static void create_initializer_local_variable_entity(entity_t *entity)
4088 assert(entity->kind == ENTITY_VARIABLE);
4089 initializer_t *initializer = entity->variable.initializer;
4090 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4091 ir_entity *irentity = entity->variable.v.entity;
4092 type_t *type = entity->declaration.type;
4094 type = get_aligned_type(type, entity->variable.alignment);
4095 create_local_initializer(initializer, dbgi, irentity, type);
4098 static void create_variable_initializer(entity_t *entity)
4100 assert(entity->kind == ENTITY_VARIABLE);
4101 initializer_t *initializer = entity->variable.initializer;
4102 if (initializer == NULL)
4105 declaration_kind_t declaration_kind
4106 = (declaration_kind_t) entity->declaration.kind;
4107 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4108 create_initializer_local_variable_entity(entity);
4112 type_t *type = entity->declaration.type;
4113 type_qualifiers_t tq = get_type_qualifier(type, true);
4115 if (initializer->kind == INITIALIZER_VALUE) {
4116 initializer_value_t *initializer_value = &initializer->value;
4117 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4119 ir_node *value = expression_to_firm(initializer_value->value);
4121 type_t *type = initializer_value->value->base.type;
4122 ir_mode *mode = get_ir_mode_storage(type);
4123 value = create_conv(dbgi, value, mode);
4124 value = do_strict_conv(dbgi, value);
4126 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4127 set_value(entity->variable.v.value_number, value);
4129 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4131 ir_entity *irentity = entity->variable.v.entity;
4133 if (tq & TYPE_QUALIFIER_CONST) {
4134 set_entity_variability(irentity, variability_constant);
4136 set_entity_variability(irentity, variability_initialized);
4138 set_atomic_ent_value(irentity, value);
4141 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4142 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4144 ir_entity *irentity = entity->variable.v.entity;
4145 ir_initializer_t *irinitializer
4146 = create_ir_initializer(initializer, type);
4148 if (tq & TYPE_QUALIFIER_CONST) {
4149 set_entity_variability(irentity, variability_constant);
4151 set_entity_variability(irentity, variability_initialized);
4153 set_entity_initializer(irentity, irinitializer);
4157 static void create_variable_length_array(entity_t *entity)
4159 assert(entity->kind == ENTITY_VARIABLE);
4160 assert(entity->variable.initializer == NULL);
4162 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4163 entity->variable.v.vla_base = NULL;
4165 /* TODO: record VLA somewhere so we create the free node when we leave
4169 static void allocate_variable_length_array(entity_t *entity)
4171 assert(entity->kind == ENTITY_VARIABLE);
4172 assert(entity->variable.initializer == NULL);
4173 assert(get_cur_block() != NULL);
4175 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4176 type_t *type = entity->declaration.type;
4177 ir_type *el_type = get_ir_type(type->array.element_type);
4179 /* make sure size_node is calculated */
4180 get_type_size(type);
4181 ir_node *elems = type->array.size_node;
4182 ir_node *mem = get_store();
4183 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4185 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4186 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4189 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4190 entity->variable.v.vla_base = addr;
4194 * Creates a Firm local variable from a declaration.
4196 static void create_local_variable(entity_t *entity)
4198 assert(entity->kind == ENTITY_VARIABLE);
4199 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4201 bool needs_entity = entity->variable.address_taken;
4202 type_t *type = skip_typeref(entity->declaration.type);
4204 /* is it a variable length array? */
4205 if (is_type_array(type) && !type->array.size_constant) {
4206 create_variable_length_array(entity);
4208 } else if (is_type_array(type) || is_type_compound(type)) {
4209 needs_entity = true;
4210 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4211 needs_entity = true;
4215 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4216 create_variable_entity(entity,
4217 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4220 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4221 entity->variable.v.value_number = next_value_number_function;
4222 set_irg_loc_description(current_ir_graph, next_value_number_function,
4224 ++next_value_number_function;
4228 static void create_local_static_variable(entity_t *entity)
4230 assert(entity->kind == ENTITY_VARIABLE);
4231 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4233 type_t *type = skip_typeref(entity->declaration.type);
4234 type = get_aligned_type(type, entity->variable.alignment);
4236 ir_type *const var_type = entity->variable.thread_local ?
4237 get_tls_type() : get_glob_type();
4238 ir_type *const irtype = get_ir_type(type);
4239 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4241 size_t l = strlen(entity->base.symbol->string);
4242 char buf[l + sizeof(".%u")];
4243 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4244 ident *const id = id_unique(buf);
4246 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4248 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4249 set_entity_volatility(irentity, volatility_is_volatile);
4252 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4253 entity->variable.v.entity = irentity;
4255 set_entity_ld_ident(irentity, id);
4256 set_entity_variability(irentity, variability_uninitialized);
4257 set_entity_visibility(irentity, visibility_local);
4258 set_entity_allocation(irentity, entity->variable.thread_local ?
4259 allocation_automatic : allocation_static);
4261 ir_graph *const old_current_ir_graph = current_ir_graph;
4262 current_ir_graph = get_const_code_irg();
4264 create_variable_initializer(entity);
4266 assert(current_ir_graph == get_const_code_irg());
4267 current_ir_graph = old_current_ir_graph;
4272 static void return_statement_to_firm(return_statement_t *statement)
4274 if (get_cur_block() == NULL)
4277 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4278 type_t *type = current_function_entity->declaration.type;
4279 ir_type *func_irtype = get_ir_type(type);
4284 if (get_method_n_ress(func_irtype) > 0) {
4285 ir_type *res_type = get_method_res_type(func_irtype, 0);
4287 if (statement->value != NULL) {
4288 ir_node *node = expression_to_firm(statement->value);
4289 if (!is_compound_type(res_type)) {
4290 type_t *type = statement->value->base.type;
4291 ir_mode *mode = get_ir_mode_storage(type);
4292 node = create_conv(dbgi, node, mode);
4293 node = do_strict_conv(dbgi, node);
4298 if (is_compound_type(res_type)) {
4301 mode = get_type_mode(res_type);
4303 in[0] = new_Unknown(mode);
4307 /* build return_value for its side effects */
4308 if (statement->value != NULL) {
4309 expression_to_firm(statement->value);
4314 ir_node *store = get_store();
4315 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4317 ir_node *end_block = get_irg_end_block(current_ir_graph);
4318 add_immBlock_pred(end_block, ret);
4320 set_cur_block(NULL);
4323 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4325 if (get_cur_block() == NULL)
4328 return expression_to_firm(statement->expression);
4331 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4333 entity_t *entity = compound->scope.entities;
4334 for ( ; entity != NULL; entity = entity->base.next) {
4335 if (!is_declaration(entity))
4338 create_local_declaration(entity);
4341 ir_node *result = NULL;
4342 statement_t *statement = compound->statements;
4343 for ( ; statement != NULL; statement = statement->base.next) {
4344 if (statement->base.next == NULL
4345 && statement->kind == STATEMENT_EXPRESSION) {
4346 result = expression_statement_to_firm(
4347 &statement->expression);
4350 statement_to_firm(statement);
4356 static void create_global_variable(entity_t *entity)
4358 assert(entity->kind == ENTITY_VARIABLE);
4361 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4362 case STORAGE_CLASS_STATIC: vis = visibility_local; break;
4363 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4364 case STORAGE_CLASS_NONE: vis = visibility_external_visible; break;
4366 default: panic("Invalid storage class for global variable");
4369 ir_type *var_type = entity->variable.thread_local ?
4370 get_tls_type() : get_glob_type();
4371 create_variable_entity(entity,
4372 DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4373 set_entity_visibility(entity->variable.v.entity, vis);
4376 static void create_local_declaration(entity_t *entity)
4378 assert(is_declaration(entity));
4380 /* construct type */
4381 (void) get_ir_type(entity->declaration.type);
4382 if (entity->base.symbol == NULL) {
4386 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4387 case STORAGE_CLASS_STATIC:
4388 create_local_static_variable(entity);
4390 case STORAGE_CLASS_EXTERN:
4391 if (entity->kind == ENTITY_FUNCTION) {
4392 assert(entity->function.statement == NULL);
4393 get_function_entity(entity);
4395 create_global_variable(entity);
4396 create_variable_initializer(entity);
4399 case STORAGE_CLASS_NONE:
4400 case STORAGE_CLASS_AUTO:
4401 case STORAGE_CLASS_REGISTER:
4402 if (entity->kind == ENTITY_FUNCTION) {
4403 if (entity->function.statement != NULL) {
4404 get_function_entity(entity);
4405 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4406 enqueue_inner_function(entity);
4408 get_function_entity(entity);
4411 create_local_variable(entity);
4414 case STORAGE_CLASS_TYPEDEF:
4417 panic("invalid storage class found");
4420 static void initialize_local_declaration(entity_t *entity)
4422 if (entity->base.symbol == NULL)
4425 switch ((declaration_kind_t) entity->declaration.kind) {
4426 case DECLARATION_KIND_LOCAL_VARIABLE:
4427 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4428 create_variable_initializer(entity);
4431 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4432 allocate_variable_length_array(entity);
4435 case DECLARATION_KIND_COMPOUND_MEMBER:
4436 case DECLARATION_KIND_GLOBAL_VARIABLE:
4437 case DECLARATION_KIND_FUNCTION:
4438 case DECLARATION_KIND_INNER_FUNCTION:
4441 case DECLARATION_KIND_PARAMETER:
4442 case DECLARATION_KIND_PARAMETER_ENTITY:
4443 panic("can't initialize parameters");
4445 case DECLARATION_KIND_UNKNOWN:
4446 panic("can't initialize unknown declaration");
4448 panic("invalid declaration kind");
4451 static void declaration_statement_to_firm(declaration_statement_t *statement)
4453 entity_t * entity = statement->declarations_begin;
4454 entity_t *const last = statement->declarations_end;
4455 if (entity != NULL) {
4456 for ( ;; entity = entity->base.next) {
4457 if (is_declaration(entity)) {
4458 initialize_local_declaration(entity);
4459 } else if (entity->kind == ENTITY_TYPEDEF) {
4460 type_t *const type = skip_typeref(entity->typedefe.type);
4461 if (is_type_array(type) && type->array.is_vla)
4462 get_vla_size(&type->array);
4470 static void if_statement_to_firm(if_statement_t *statement)
4472 ir_node *cur_block = get_cur_block();
4474 ir_node *fallthrough_block = NULL;
4476 /* the true (blocks) */
4477 ir_node *true_block = NULL;
4478 if (statement->true_statement != NULL) {
4479 true_block = new_immBlock();
4480 set_cur_block(true_block);
4481 statement_to_firm(statement->true_statement);
4482 if (get_cur_block() != NULL) {
4483 ir_node *jmp = new_Jmp();
4484 if (fallthrough_block == NULL)
4485 fallthrough_block = new_immBlock();
4486 add_immBlock_pred(fallthrough_block, jmp);
4490 /* the false (blocks) */
4491 ir_node *false_block = NULL;
4492 if (statement->false_statement != NULL) {
4493 false_block = new_immBlock();
4494 set_cur_block(false_block);
4496 statement_to_firm(statement->false_statement);
4497 if (get_cur_block() != NULL) {
4498 ir_node *jmp = new_Jmp();
4499 if (fallthrough_block == NULL)
4500 fallthrough_block = new_immBlock();
4501 add_immBlock_pred(fallthrough_block, jmp);
4505 /* create the condition */
4506 if (cur_block != NULL) {
4507 if (true_block == NULL || false_block == NULL) {
4508 if (fallthrough_block == NULL)
4509 fallthrough_block = new_immBlock();
4510 if (true_block == NULL)
4511 true_block = fallthrough_block;
4512 if (false_block == NULL)
4513 false_block = fallthrough_block;
4516 set_cur_block(cur_block);
4517 create_condition_evaluation(statement->condition, true_block,
4521 mature_immBlock(true_block);
4522 if (false_block != fallthrough_block && false_block != NULL) {
4523 mature_immBlock(false_block);
4525 if (fallthrough_block != NULL) {
4526 mature_immBlock(fallthrough_block);
4529 set_cur_block(fallthrough_block);
4532 static void while_statement_to_firm(while_statement_t *statement)
4534 ir_node *jmp = NULL;
4535 if (get_cur_block() != NULL) {
4539 /* create the header block */
4540 ir_node *header_block = new_immBlock();
4542 add_immBlock_pred(header_block, jmp);
4546 ir_node *old_continue_label = continue_label;
4547 ir_node *old_break_label = break_label;
4548 continue_label = header_block;
4551 ir_node *body_block = new_immBlock();
4552 set_cur_block(body_block);
4553 statement_to_firm(statement->body);
4554 ir_node *false_block = break_label;
4556 assert(continue_label == header_block);
4557 continue_label = old_continue_label;
4558 break_label = old_break_label;
4560 if (get_cur_block() != NULL) {
4562 add_immBlock_pred(header_block, jmp);
4565 /* shortcut for while(true) */
4566 if (is_constant_expression(statement->condition)
4567 && fold_constant(statement->condition) != 0) {
4568 set_cur_block(header_block);
4569 ir_node *header_jmp = new_Jmp();
4570 add_immBlock_pred(body_block, header_jmp);
4572 keep_alive(body_block);
4573 keep_all_memory(body_block);
4574 set_cur_block(body_block);
4576 if (false_block == NULL) {
4577 false_block = new_immBlock();
4580 /* create the condition */
4581 set_cur_block(header_block);
4583 create_condition_evaluation(statement->condition, body_block,
4587 mature_immBlock(body_block);
4588 mature_immBlock(header_block);
4589 if (false_block != NULL) {
4590 mature_immBlock(false_block);
4593 set_cur_block(false_block);
4596 static void do_while_statement_to_firm(do_while_statement_t *statement)
4598 ir_node *jmp = NULL;
4599 if (get_cur_block() != NULL) {
4603 /* create the header block */
4604 ir_node *header_block = new_immBlock();
4607 ir_node *body_block = new_immBlock();
4609 add_immBlock_pred(body_block, jmp);
4612 ir_node *old_continue_label = continue_label;
4613 ir_node *old_break_label = break_label;
4614 continue_label = header_block;
4617 set_cur_block(body_block);
4618 statement_to_firm(statement->body);
4619 ir_node *false_block = break_label;
4621 assert(continue_label == header_block);
4622 continue_label = old_continue_label;
4623 break_label = old_break_label;
4625 if (get_cur_block() != NULL) {
4626 ir_node *body_jmp = new_Jmp();
4627 add_immBlock_pred(header_block, body_jmp);
4628 mature_immBlock(header_block);
4631 if (false_block == NULL) {
4632 false_block = new_immBlock();
4635 /* create the condition */
4636 set_cur_block(header_block);
4638 create_condition_evaluation(statement->condition, body_block, false_block);
4639 mature_immBlock(body_block);
4640 mature_immBlock(header_block);
4641 mature_immBlock(false_block);
4643 set_cur_block(false_block);
4646 static void for_statement_to_firm(for_statement_t *statement)
4648 ir_node *jmp = NULL;
4650 /* create declarations */
4651 entity_t *entity = statement->scope.entities;
4652 for ( ; entity != NULL; entity = entity->base.next) {
4653 if (!is_declaration(entity))
4656 create_local_declaration(entity);
4659 if (get_cur_block() != NULL) {
4660 entity = statement->scope.entities;
4661 for ( ; entity != NULL; entity = entity->base.next) {
4662 if (!is_declaration(entity))
4665 initialize_local_declaration(entity);
4668 if (statement->initialisation != NULL) {
4669 expression_to_firm(statement->initialisation);
4676 /* create the step block */
4677 ir_node *const step_block = new_immBlock();
4678 set_cur_block(step_block);
4679 if (statement->step != NULL) {
4680 expression_to_firm(statement->step);
4682 ir_node *const step_jmp = new_Jmp();
4684 /* create the header block */
4685 ir_node *const header_block = new_immBlock();
4686 set_cur_block(header_block);
4688 add_immBlock_pred(header_block, jmp);
4690 add_immBlock_pred(header_block, step_jmp);
4692 /* the false block */
4693 ir_node *const false_block = new_immBlock();
4696 ir_node *body_block;
4697 if (statement->body != NULL) {
4698 ir_node *const old_continue_label = continue_label;
4699 ir_node *const old_break_label = break_label;
4700 continue_label = step_block;
4701 break_label = false_block;
4703 body_block = new_immBlock();
4704 set_cur_block(body_block);
4705 statement_to_firm(statement->body);
4707 assert(continue_label == step_block);
4708 assert(break_label == false_block);
4709 continue_label = old_continue_label;
4710 break_label = old_break_label;
4712 if (get_cur_block() != NULL) {
4714 add_immBlock_pred(step_block, jmp);
4717 body_block = step_block;
4720 /* create the condition */
4721 set_cur_block(header_block);
4722 if (statement->condition != NULL) {
4723 create_condition_evaluation(statement->condition, body_block,
4726 keep_alive(header_block);
4727 keep_all_memory(header_block);
4729 add_immBlock_pred(body_block, jmp);
4732 mature_immBlock(body_block);
4733 mature_immBlock(false_block);
4734 mature_immBlock(step_block);
4735 mature_immBlock(header_block);
4736 mature_immBlock(false_block);
4738 set_cur_block(false_block);
4741 static void create_jump_statement(const statement_t *statement,
4742 ir_node *target_block)
4744 if (get_cur_block() == NULL)
4747 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4748 ir_node *jump = new_d_Jmp(dbgi);
4749 add_immBlock_pred(target_block, jump);
4751 set_cur_block(NULL);
4754 static ir_node *get_break_label(void)
4756 if (break_label == NULL) {
4757 break_label = new_immBlock();
4762 static void switch_statement_to_firm(switch_statement_t *statement)
4764 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4766 ir_node *expression = expression_to_firm(statement->expression);
4767 ir_node *cond = new_d_Cond(dbgi, expression);
4769 set_cur_block(NULL);
4771 ir_node *const old_switch_cond = current_switch_cond;
4772 ir_node *const old_break_label = break_label;
4773 const bool old_saw_default_label = saw_default_label;
4774 saw_default_label = false;
4775 current_switch_cond = cond;
4777 switch_statement_t *const old_switch = current_switch;
4778 current_switch = statement;
4780 /* determine a free number for the default label */
4781 unsigned long num_cases = 0;
4783 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4784 if (l->expression == NULL) {
4788 if (l->last_case >= l->first_case)
4789 num_cases += l->last_case - l->first_case + 1;
4790 if (l->last_case > def_nr)
4791 def_nr = l->last_case;
4794 if (def_nr == INT_MAX) {
4795 /* Bad: an overflow will occurr, we cannot be sure that the
4796 * maximum + 1 is a free number. Scan the values a second
4797 * time to find a free number.
4799 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4801 memset(bits, 0, (num_cases + 7) >> 3);
4802 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4803 if (l->expression == NULL) {
4807 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4808 if (start < num_cases && l->last_case >= 0) {
4809 unsigned long end = (unsigned long)l->last_case < num_cases ?
4810 (unsigned long)l->last_case : num_cases - 1;
4811 for (unsigned long cns = start; cns <= end; ++cns) {
4812 bits[cns >> 3] |= (1 << (cns & 7));
4816 /* We look at the first num_cases constants:
4817 * Either they are densed, so we took the last (num_cases)
4818 * one, or they are non densed, so we will find one free
4822 for (i = 0; i < num_cases; ++i)
4823 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4831 statement->default_proj_nr = def_nr;
4833 if (statement->body != NULL) {
4834 statement_to_firm(statement->body);
4837 if (get_cur_block() != NULL) {
4838 ir_node *jmp = new_Jmp();
4839 add_immBlock_pred(get_break_label(), jmp);
4842 if (!saw_default_label) {
4843 set_cur_block(get_nodes_block(cond));
4844 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4845 statement->default_proj_nr);
4846 add_immBlock_pred(get_break_label(), proj);
4849 if (break_label != NULL) {
4850 mature_immBlock(break_label);
4852 set_cur_block(break_label);
4854 assert(current_switch_cond == cond);
4855 current_switch = old_switch;
4856 current_switch_cond = old_switch_cond;
4857 break_label = old_break_label;
4858 saw_default_label = old_saw_default_label;
4861 static void case_label_to_firm(const case_label_statement_t *statement)
4863 if (statement->is_empty_range)
4866 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4868 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4871 ir_node *block = new_immBlock();
4873 set_cur_block(get_nodes_block(current_switch_cond));
4874 if (statement->expression != NULL) {
4875 long pn = statement->first_case;
4876 long end_pn = statement->last_case;
4877 assert(pn <= end_pn);
4878 /* create jumps for all cases in the given range */
4880 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4881 add_immBlock_pred(block, proj);
4882 } while(pn++ < end_pn);
4884 saw_default_label = true;
4885 proj = new_d_defaultProj(dbgi, current_switch_cond,
4886 current_switch->default_proj_nr);
4888 add_immBlock_pred(block, proj);
4891 if (fallthrough != NULL) {
4892 add_immBlock_pred(block, fallthrough);
4894 mature_immBlock(block);
4895 set_cur_block(block);
4897 if (statement->statement != NULL) {
4898 statement_to_firm(statement->statement);
4902 static void label_to_firm(const label_statement_t *statement)
4904 ir_node *block = get_label_block(statement->label);
4906 if (get_cur_block() != NULL) {
4907 ir_node *jmp = new_Jmp();
4908 add_immBlock_pred(block, jmp);
4911 set_cur_block(block);
4913 keep_all_memory(block);
4915 if (statement->statement != NULL) {
4916 statement_to_firm(statement->statement);
4920 static void goto_to_firm(const goto_statement_t *statement)
4922 if (get_cur_block() == NULL)
4925 if (statement->expression) {
4926 ir_node *irn = expression_to_firm(statement->expression);
4927 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4928 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4930 set_irn_link(ijmp, ijmp_list);
4933 ir_node *block = get_label_block(statement->label);
4934 ir_node *jmp = new_Jmp();
4935 add_immBlock_pred(block, jmp);
4937 set_cur_block(NULL);
4940 static void asm_statement_to_firm(const asm_statement_t *statement)
4942 bool needs_memory = false;
4944 if (statement->is_volatile) {
4945 needs_memory = true;
4948 size_t n_clobbers = 0;
4949 asm_clobber_t *clobber = statement->clobbers;
4950 for ( ; clobber != NULL; clobber = clobber->next) {
4951 const char *clobber_str = clobber->clobber.begin;
4953 if (!be_is_valid_clobber(clobber_str)) {
4954 errorf(&statement->base.source_position,
4955 "invalid clobber '%s' specified", clobber->clobber);
4959 if (strcmp(clobber_str, "memory") == 0) {
4960 needs_memory = true;
4964 ident *id = new_id_from_str(clobber_str);
4965 obstack_ptr_grow(&asm_obst, id);
4968 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4969 ident **clobbers = NULL;
4970 if (n_clobbers > 0) {
4971 clobbers = obstack_finish(&asm_obst);
4974 size_t n_inputs = 0;
4975 asm_argument_t *argument = statement->inputs;
4976 for ( ; argument != NULL; argument = argument->next)
4978 size_t n_outputs = 0;
4979 argument = statement->outputs;
4980 for ( ; argument != NULL; argument = argument->next)
4983 unsigned next_pos = 0;
4985 ir_node *ins[n_inputs + n_outputs + 1];
4988 ir_asm_constraint tmp_in_constraints[n_outputs];
4990 const expression_t *out_exprs[n_outputs];
4991 ir_node *out_addrs[n_outputs];
4992 size_t out_size = 0;
4994 argument = statement->outputs;
4995 for ( ; argument != NULL; argument = argument->next) {
4996 const char *constraints = argument->constraints.begin;
4997 asm_constraint_flags_t asm_flags
4998 = be_parse_asm_constraints(constraints);
5000 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5001 warningf(&statement->base.source_position,
5002 "some constraints in '%s' are not supported", constraints);
5004 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5005 errorf(&statement->base.source_position,
5006 "some constraints in '%s' are invalid", constraints);
5009 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5010 errorf(&statement->base.source_position,
5011 "no write flag specified for output constraints '%s'",
5016 unsigned pos = next_pos++;
5017 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5018 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5019 expression_t *expr = argument->expression;
5020 ir_node *addr = expression_to_addr(expr);
5021 /* in+output, construct an artifical same_as constraint on the
5023 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5025 ir_node *value = get_value_from_lvalue(expr, addr);
5027 snprintf(buf, sizeof(buf), "%u", pos);
5029 ir_asm_constraint constraint;
5030 constraint.pos = pos;
5031 constraint.constraint = new_id_from_str(buf);
5032 constraint.mode = get_ir_mode_storage(expr->base.type);
5033 tmp_in_constraints[in_size] = constraint;
5034 ins[in_size] = value;
5039 out_exprs[out_size] = expr;
5040 out_addrs[out_size] = addr;
5042 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5043 /* pure memory ops need no input (but we have to make sure we
5044 * attach to the memory) */
5045 assert(! (asm_flags &
5046 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5047 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5048 needs_memory = true;
5050 /* we need to attach the address to the inputs */
5051 expression_t *expr = argument->expression;
5053 ir_asm_constraint constraint;
5054 constraint.pos = pos;
5055 constraint.constraint = new_id_from_str(constraints);
5056 constraint.mode = NULL;
5057 tmp_in_constraints[in_size] = constraint;
5059 ins[in_size] = expression_to_addr(expr);
5063 errorf(&statement->base.source_position,
5064 "only modifiers but no place set in constraints '%s'",
5069 ir_asm_constraint constraint;
5070 constraint.pos = pos;
5071 constraint.constraint = new_id_from_str(constraints);
5072 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5074 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5076 assert(obstack_object_size(&asm_obst)
5077 == out_size * sizeof(ir_asm_constraint));
5078 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5081 obstack_grow(&asm_obst, tmp_in_constraints,
5082 in_size * sizeof(tmp_in_constraints[0]));
5083 /* find and count input and output arguments */
5084 argument = statement->inputs;
5085 for ( ; argument != NULL; argument = argument->next) {
5086 const char *constraints = argument->constraints.begin;
5087 asm_constraint_flags_t asm_flags
5088 = be_parse_asm_constraints(constraints);
5090 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5091 errorf(&statement->base.source_position,
5092 "some constraints in '%s' are not supported", constraints);
5095 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5096 errorf(&statement->base.source_position,
5097 "some constraints in '%s' are invalid", constraints);
5100 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5101 errorf(&statement->base.source_position,
5102 "write flag specified for input constraints '%s'",
5108 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5109 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5110 /* we can treat this as "normal" input */
5111 input = expression_to_firm(argument->expression);
5112 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5113 /* pure memory ops need no input (but we have to make sure we
5114 * attach to the memory) */
5115 assert(! (asm_flags &
5116 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5117 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5118 needs_memory = true;
5119 input = expression_to_addr(argument->expression);
5121 errorf(&statement->base.source_position,
5122 "only modifiers but no place set in constraints '%s'",
5127 ir_asm_constraint constraint;
5128 constraint.pos = next_pos++;
5129 constraint.constraint = new_id_from_str(constraints);
5130 constraint.mode = get_irn_mode(input);
5132 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5133 ins[in_size++] = input;
5137 ir_asm_constraint constraint;
5138 constraint.pos = next_pos++;
5139 constraint.constraint = new_id_from_str("");
5140 constraint.mode = mode_M;
5142 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5143 ins[in_size++] = get_store();
5146 assert(obstack_object_size(&asm_obst)
5147 == in_size * sizeof(ir_asm_constraint));
5148 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5150 /* create asm node */
5151 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5153 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5155 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5156 out_size, output_constraints,
5157 n_clobbers, clobbers, asm_text);
5159 if (statement->is_volatile) {
5160 set_irn_pinned(node, op_pin_state_pinned);
5162 set_irn_pinned(node, op_pin_state_floats);
5165 /* create output projs & connect them */
5167 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5172 for (i = 0; i < out_size; ++i) {
5173 const expression_t *out_expr = out_exprs[i];
5175 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5176 ir_node *proj = new_Proj(node, mode, pn);
5177 ir_node *addr = out_addrs[i];
5179 set_value_for_expression_addr(out_expr, proj, addr);
5183 static void ms_try_statement_to_firm(ms_try_statement_t *statement) {
5184 statement_to_firm(statement->try_statement);
5185 warningf(&statement->base.source_position, "structured exception handling ignored");
5188 static void leave_statement_to_firm(leave_statement_t *statement) {
5189 errorf(&statement->base.source_position, "__leave not supported yet");
5193 * Transform a statement.
5195 static void statement_to_firm(statement_t *statement)
5198 assert(!statement->base.transformed);
5199 statement->base.transformed = true;
5202 switch (statement->kind) {
5203 case STATEMENT_INVALID:
5204 panic("invalid statement found");
5205 case STATEMENT_EMPTY:
5208 case STATEMENT_COMPOUND:
5209 compound_statement_to_firm(&statement->compound);
5211 case STATEMENT_RETURN:
5212 return_statement_to_firm(&statement->returns);
5214 case STATEMENT_EXPRESSION:
5215 expression_statement_to_firm(&statement->expression);
5218 if_statement_to_firm(&statement->ifs);
5220 case STATEMENT_WHILE:
5221 while_statement_to_firm(&statement->whiles);
5223 case STATEMENT_DO_WHILE:
5224 do_while_statement_to_firm(&statement->do_while);
5226 case STATEMENT_DECLARATION:
5227 declaration_statement_to_firm(&statement->declaration);
5229 case STATEMENT_BREAK:
5230 create_jump_statement(statement, get_break_label());
5232 case STATEMENT_CONTINUE:
5233 create_jump_statement(statement, continue_label);
5235 case STATEMENT_SWITCH:
5236 switch_statement_to_firm(&statement->switchs);
5238 case STATEMENT_CASE_LABEL:
5239 case_label_to_firm(&statement->case_label);
5242 for_statement_to_firm(&statement->fors);
5244 case STATEMENT_LABEL:
5245 label_to_firm(&statement->label);
5247 case STATEMENT_GOTO:
5248 goto_to_firm(&statement->gotos);
5251 asm_statement_to_firm(&statement->asms);
5253 case STATEMENT_MS_TRY:
5254 ms_try_statement_to_firm(&statement->ms_try);
5256 case STATEMENT_LEAVE:
5257 leave_statement_to_firm(&statement->leave);
5260 panic("statement not implemented");
5263 static int count_local_variables(const entity_t *entity,
5264 const entity_t *const last)
5267 for (; entity != NULL; entity = entity->base.next) {
5271 if (entity->kind == ENTITY_VARIABLE) {
5272 type = skip_typeref(entity->declaration.type);
5273 address_taken = entity->variable.address_taken;
5274 } else if (entity->kind == ENTITY_PARAMETER) {
5275 type = skip_typeref(entity->declaration.type);
5276 address_taken = entity->parameter.address_taken;
5281 if (!address_taken && is_type_scalar(type))
5290 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5292 int *const count = env;
5294 switch (stmt->kind) {
5295 case STATEMENT_DECLARATION: {
5296 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5297 *count += count_local_variables(decl_stmt->declarations_begin,
5298 decl_stmt->declarations_end);
5303 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5311 static int get_function_n_local_vars(entity_t *entity)
5315 /* count parameters */
5316 count += count_local_variables(entity->function.parameters.entities, NULL);
5318 /* count local variables declared in body */
5319 walk_statements(entity->function.statement, count_local_variables_in_stmt,
5324 static void initialize_function_parameters(entity_t *entity)
5326 assert(entity->kind == ENTITY_FUNCTION);
5327 ir_graph *irg = current_ir_graph;
5328 ir_node *args = get_irg_args(irg);
5329 ir_node *start_block = get_irg_start_block(irg);
5330 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5333 entity_t *parameter = entity->function.parameters.entities;
5334 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5335 assert(parameter->kind == ENTITY_PARAMETER);
5336 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5337 type_t *type = skip_typeref(parameter->declaration.type);
5339 bool needs_entity = parameter->parameter.address_taken;
5340 assert(!is_type_array(type));
5341 if (is_type_compound(type)) {
5342 needs_entity = true;
5346 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5347 ident *id = new_id_from_str(parameter->base.symbol->string);
5348 set_entity_ident(entity, id);
5350 parameter->declaration.kind
5351 = DECLARATION_KIND_PARAMETER_ENTITY;
5352 parameter->parameter.v.entity = entity;
5356 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5357 ir_mode *param_mode = get_type_mode(param_irtype);
5360 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5362 ir_mode *mode = get_ir_mode_storage(type);
5363 value = create_conv(NULL, value, mode);
5364 value = do_strict_conv(NULL, value);
5366 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5367 parameter->parameter.v.value_number = next_value_number_function;
5368 set_irg_loc_description(current_ir_graph, next_value_number_function,
5370 ++next_value_number_function;
5372 set_value(parameter->parameter.v.value_number, value);
5377 * Handle additional decl modifiers for IR-graphs
5379 * @param irg the IR-graph
5380 * @param dec_modifiers additional modifiers
5382 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5384 if (decl_modifiers & DM_RETURNS_TWICE) {
5385 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5386 set_irg_additional_property(irg, mtp_property_returns_twice);
5388 if (decl_modifiers & DM_NORETURN) {
5389 /* TRUE if the declaration includes the Microsoft
5390 __declspec(noreturn) specifier. */
5391 set_irg_additional_property(irg, mtp_property_noreturn);
5393 if (decl_modifiers & DM_NOTHROW) {
5394 /* TRUE if the declaration includes the Microsoft
5395 __declspec(nothrow) specifier. */
5396 set_irg_additional_property(irg, mtp_property_nothrow);
5398 if (decl_modifiers & DM_NAKED) {
5399 /* TRUE if the declaration includes the Microsoft
5400 __declspec(naked) specifier. */
5401 set_irg_additional_property(irg, mtp_property_naked);
5403 if (decl_modifiers & DM_FORCEINLINE) {
5404 /* TRUE if the declaration includes the
5405 Microsoft __forceinline specifier. */
5406 set_irg_inline_property(irg, irg_inline_forced);
5408 if (decl_modifiers & DM_NOINLINE) {
5409 /* TRUE if the declaration includes the Microsoft
5410 __declspec(noinline) specifier. */
5411 set_irg_inline_property(irg, irg_inline_forbidden);
5415 static void add_function_pointer(ir_type *segment, ir_entity *method,
5416 const char *unique_template)
5418 ir_type *method_type = get_entity_type(method);
5419 ident *id = id_unique(unique_template);
5420 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5422 ident *ide = id_unique(unique_template);
5423 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5424 ir_graph *irg = get_const_code_irg();
5425 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5428 set_entity_compiler_generated(ptr, 1);
5429 set_entity_variability(ptr, variability_constant);
5430 set_atomic_ent_value(ptr, val);
5434 * Generate possible IJmp branches to a given label block.
5436 static void gen_ijmp_branches(ir_node *block) {
5438 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5439 add_immBlock_pred(block, ijmp);
5444 * Create code for a function.
5446 static void create_function(entity_t *entity)
5448 assert(entity->kind == ENTITY_FUNCTION);
5449 ir_entity *function_entity = get_function_entity(entity);
5451 if (entity->function.statement == NULL)
5454 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5455 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5456 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5458 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5459 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5460 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5463 current_function_entity = entity;
5464 current_function_name = NULL;
5465 current_funcsig = NULL;
5467 assert(all_labels == NULL);
5468 all_labels = NEW_ARR_F(label_t *, 0);
5471 int n_local_vars = get_function_n_local_vars(entity);
5472 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5474 ir_graph *old_current_function = current_function;
5475 current_function = irg;
5477 set_irg_fp_model(irg, firm_opt.fp_model);
5478 tarval_enable_fp_ops(1);
5479 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5481 ir_node *first_block = get_cur_block();
5483 /* set inline flags */
5484 if (entity->function.is_inline)
5485 set_irg_inline_property(irg, irg_inline_recomended);
5486 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5488 next_value_number_function = 0;
5489 initialize_function_parameters(entity);
5491 statement_to_firm(entity->function.statement);
5493 ir_node *end_block = get_irg_end_block(irg);
5495 /* do we have a return statement yet? */
5496 if (get_cur_block() != NULL) {
5497 type_t *type = skip_typeref(entity->declaration.type);
5498 assert(is_type_function(type));
5499 const function_type_t *func_type = &type->function;
5500 const type_t *return_type
5501 = skip_typeref(func_type->return_type);
5504 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5505 ret = new_Return(get_store(), 0, NULL);
5508 if (is_type_scalar(return_type)) {
5509 mode = get_ir_mode_storage(func_type->return_type);
5515 /* ยง5.1.2.2.3 main implicitly returns 0 */
5516 if (is_main(entity)) {
5517 in[0] = new_Const(get_mode_null(mode));
5519 in[0] = new_Unknown(mode);
5521 ret = new_Return(get_store(), 1, in);
5523 add_immBlock_pred(end_block, ret);
5526 bool has_computed_gotos = false;
5527 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5528 label_t *label = all_labels[i];
5529 if (label->address_taken) {
5530 gen_ijmp_branches(label->block);
5531 has_computed_gotos = true;
5533 mature_immBlock(label->block);
5535 if (has_computed_gotos) {
5536 /* if we have computed goto's in the function, we cannot inline it */
5537 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5538 warningf(&entity->base.source_position,
5539 "function '%Y' can never be inlined because it contains a computed goto",
5540 entity->base.symbol);
5542 set_irg_inline_property(irg, irg_inline_forbidden);
5545 DEL_ARR_F(all_labels);
5548 mature_immBlock(first_block);
5549 mature_immBlock(end_block);
5551 irg_finalize_cons(irg);
5553 /* finalize the frame type */
5554 ir_type *frame_type = get_irg_frame_type(irg);
5555 int n = get_compound_n_members(frame_type);
5558 for (int i = 0; i < n; ++i) {
5559 ir_entity *entity = get_compound_member(frame_type, i);
5560 ir_type *entity_type = get_entity_type(entity);
5562 int align = get_type_alignment_bytes(entity_type);
5563 if (align > align_all)
5567 misalign = offset % align;
5569 offset += align - misalign;
5573 set_entity_offset(entity, offset);
5574 offset += get_type_size_bytes(entity_type);
5576 set_type_size_bytes(frame_type, offset);
5577 set_type_alignment_bytes(frame_type, align_all);
5580 current_function = old_current_function;
5582 /* create inner functions */
5584 for (inner = next_inner_function(); inner != NULL;
5585 inner = next_inner_function()) {
5586 create_function(inner);
5590 static void scope_to_firm(scope_t *scope)
5592 /* first pass: create declarations */
5593 entity_t *entity = scope->entities;
5594 for ( ; entity != NULL; entity = entity->base.next) {
5595 if (entity->base.symbol == NULL)
5598 if (entity->kind == ENTITY_FUNCTION) {
5599 get_function_entity(entity);
5600 } else if (entity->kind == ENTITY_VARIABLE) {
5601 create_global_variable(entity);
5605 /* second pass: create code/initializers */
5606 entity = scope->entities;
5607 for ( ; entity != NULL; entity = entity->base.next) {
5608 if (entity->base.symbol == NULL)
5611 if (entity->kind == ENTITY_FUNCTION) {
5612 create_function(entity);
5613 } else if (entity->kind == ENTITY_VARIABLE) {
5614 assert(entity->declaration.kind
5615 == DECLARATION_KIND_GLOBAL_VARIABLE);
5616 current_ir_graph = get_const_code_irg();
5617 create_variable_initializer(entity);
5622 void init_ast2firm(void)
5624 obstack_init(&asm_obst);
5625 init_atomic_modes();
5627 /* OS option must be set to the backend */
5628 switch (firm_opt.os_support) {
5629 case OS_SUPPORT_MINGW:
5630 create_ld_ident = create_name_win32;
5632 case OS_SUPPORT_LINUX:
5633 create_ld_ident = create_name_linux_elf;
5635 case OS_SUPPORT_MACHO:
5636 create_ld_ident = create_name_macho;
5639 panic("unexpected OS support mode");
5642 /* create idents for all known runtime functions */
5643 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5644 rts_idents[i] = new_id_from_str(rts_data[i].name);
5647 entitymap_init(&entitymap);
5650 static void init_ir_types(void)
5652 static int ir_types_initialized = 0;
5653 if (ir_types_initialized)
5655 ir_types_initialized = 1;
5657 ir_type_int = get_ir_type(type_int);
5658 ir_type_const_char = get_ir_type(type_const_char);
5659 ir_type_wchar_t = get_ir_type(type_wchar_t);
5660 ir_type_void = get_ir_type(type_void);
5662 const backend_params *be_params = be_get_backend_param();
5663 mode_float_arithmetic = be_params->mode_float_arithmetic;
5666 void exit_ast2firm(void)
5668 entitymap_destroy(&entitymap);
5669 obstack_free(&asm_obst, NULL);
5672 static void global_asm_to_firm(statement_t *s)
5674 for (; s != NULL; s = s->base.next) {
5675 assert(s->kind == STATEMENT_ASM);
5677 char const *const text = s->asms.asm_text.begin;
5678 size_t size = s->asms.asm_text.size;
5680 /* skip the last \0 */
5681 if (text[size - 1] == '\0')
5684 ident *const id = new_id_from_chars(text, size);
5689 void translation_unit_to_firm(translation_unit_t *unit)
5691 /* just to be sure */
5692 continue_label = NULL;
5694 current_switch_cond = NULL;
5695 current_translation_unit = unit;
5698 inner_functions = NEW_ARR_F(entity_t *, 0);
5700 scope_to_firm(&unit->scope);
5701 global_asm_to_firm(unit->global_asm);
5703 DEL_ARR_F(inner_functions);
5704 inner_functions = NULL;
5706 current_ir_graph = NULL;
5707 current_translation_unit = NULL;