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"
42 #include "diagnostic.h"
43 #include "lang_features.h"
45 #include "type_hash.h"
47 #include "walk_statements.h"
49 #include "entitymap_t.h"
50 #include "driver/firm_opt.h"
51 #include "driver/firm_cmdline.h"
53 static ir_type *ir_type_const_char;
54 static ir_type *ir_type_wchar_t;
55 static ir_type *ir_type_void;
56 static ir_type *ir_type_int;
58 /* architecture specific floating point arithmetic mode (if any) */
59 static ir_mode *mode_float_arithmetic;
61 static int next_value_number_function;
62 static ir_node *continue_label;
63 static ir_node *break_label;
64 static ir_node *current_switch_cond;
65 static bool saw_default_label;
66 static label_t **all_labels;
67 static entity_t **inner_functions;
68 static ir_node *ijmp_list;
69 static bool constant_folding;
71 extern bool have_const_functions;
73 static const entity_t *current_function_entity;
74 static ir_node *current_function_name;
75 static ir_node *current_funcsig;
76 static switch_statement_t *current_switch;
77 static ir_graph *current_function;
78 static translation_unit_t *current_translation_unit;
80 static entitymap_t entitymap;
82 static struct obstack asm_obst;
84 typedef enum declaration_kind_t {
85 DECLARATION_KIND_UNKNOWN,
86 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
87 DECLARATION_KIND_GLOBAL_VARIABLE,
88 DECLARATION_KIND_LOCAL_VARIABLE,
89 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
90 DECLARATION_KIND_PARAMETER,
91 DECLARATION_KIND_PARAMETER_ENTITY,
92 DECLARATION_KIND_FUNCTION,
93 DECLARATION_KIND_COMPOUND_MEMBER,
94 DECLARATION_KIND_INNER_FUNCTION
97 static ir_mode *get_ir_mode_storage(type_t *type);
99 * get arithmetic mode for a type. This is different from get_ir_mode_storage,
100 * int that it returns bigger modes for floating point on some platforms
101 * (x87 internally does arithemtic with 80bits)
103 static ir_mode *get_ir_mode_arithmetic(type_t *type);
105 static ir_type *get_ir_type_incomplete(type_t *type);
107 static void enqueue_inner_function(entity_t *entity)
109 ARR_APP1(entity_t*, inner_functions, entity);
112 static entity_t *next_inner_function(void)
114 int len = ARR_LEN(inner_functions);
118 entity_t *entity = inner_functions[len-1];
119 ARR_SHRINKLEN(inner_functions, len-1);
124 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
126 const entity_t *entity = get_irg_loc_description(irg, pos);
128 if (entity != NULL) {
129 warningf(&entity->base.source_position,
130 "%s '%#T' might be used uninitialized",
131 get_entity_kind_name(entity->kind),
132 entity->declaration.type, entity->base.symbol);
134 return new_r_Unknown(irg, mode);
137 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
139 const source_position_t *pos = (const source_position_t*) dbg;
142 return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
146 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
148 const source_position_t *pos = (const source_position_t*) dbg;
153 return pos->input_name;
156 static dbg_info *get_dbg_info(const source_position_t *pos)
158 return (dbg_info*) pos;
161 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
163 static ir_mode *mode_int, *mode_uint;
165 static ir_node *_expression_to_firm(const expression_t *expression);
166 static ir_node *expression_to_firm(const expression_t *expression);
167 static void create_local_declaration(entity_t *entity);
169 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
171 unsigned flags = get_atomic_type_flags(kind);
172 unsigned size = get_atomic_type_size(kind);
173 if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
174 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
177 unsigned bit_size = size * 8;
178 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
179 unsigned modulo_shift;
180 ir_mode_arithmetic arithmetic;
182 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
183 assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
184 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
186 sort = irms_int_number;
187 arithmetic = irma_twos_complement;
188 modulo_shift = bit_size < machine_size ? machine_size : bit_size;
190 assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
191 snprintf(name, sizeof(name), "F%u", bit_size);
192 sort = irms_float_number;
193 arithmetic = irma_ieee754;
196 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
204 * Initialises the atomic modes depending on the machine size.
206 static void init_atomic_modes(void)
208 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
209 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
211 mode_int = atomic_modes[ATOMIC_TYPE_INT];
212 mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
214 /* there's no real void type in firm */
215 atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
217 /* initialize pointer modes */
219 ir_mode_sort sort = irms_reference;
220 unsigned bit_size = machine_size;
222 ir_mode_arithmetic arithmetic = irma_twos_complement;
223 unsigned modulo_shift
224 = bit_size < machine_size ? machine_size : bit_size;
226 snprintf(name, sizeof(name), "p%u", machine_size);
227 ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
230 set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
231 set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
233 /* Hmm, pointers should be machine size */
234 set_modeP_data(ptr_mode);
235 set_modeP_code(ptr_mode);
238 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
240 assert(kind <= ATOMIC_TYPE_LAST);
241 return atomic_modes[kind];
244 static unsigned get_compound_type_size(compound_type_t *type)
246 ir_type *irtype = get_ir_type((type_t*) type);
247 return get_type_size_bytes(irtype);
250 static unsigned get_array_type_size(array_type_t *type)
252 assert(!type->is_vla);
253 ir_type *irtype = get_ir_type((type_t*) type);
254 return get_type_size_bytes(irtype);
257 static unsigned get_type_size_const(type_t *type)
261 panic("error type occurred");
263 return get_atomic_type_size(type->atomic.akind);
265 return 2 * get_atomic_type_size(type->complex.akind);
267 return get_atomic_type_size(type->imaginary.akind);
269 return get_atomic_type_size(type->enumt.akind);
270 case TYPE_COMPOUND_UNION:
271 case TYPE_COMPOUND_STRUCT:
272 return get_compound_type_size(&type->compound);
274 /* just a pointer to the function */
275 return get_mode_size_bytes(mode_P_code);
278 return get_mode_size_bytes(mode_P_data);
280 return get_array_type_size(&type->array);
282 return get_type_size_const(type->builtin.real_type);
284 panic("type size of bitfield request");
290 panic("Trying to determine size of invalid type");
293 static ir_node *get_vla_size(array_type_t *const type)
295 ir_node *size_node = type->size_node;
296 if (size_node == NULL) {
297 size_node = expression_to_firm(type->size_expression);
298 type->size_node = size_node;
303 static ir_node *get_type_size(type_t *type)
305 type = skip_typeref(type);
307 if (is_type_array(type) && type->array.is_vla) {
308 ir_node *size_node = get_vla_size(&type->array);
309 ir_node *elem_size = get_type_size(type->array.element_type);
310 ir_mode *mode = get_irn_mode(size_node);
311 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
315 ir_mode *mode = get_ir_mode_storage(type_size_t);
317 sym.type_p = get_ir_type(type);
318 return new_SymConst(mode, sym, symconst_type_size);
321 static unsigned count_parameters(const function_type_t *function_type)
325 function_parameter_t *parameter = function_type->parameters;
326 for ( ; parameter != NULL; parameter = parameter->next) {
333 static type_t *get_aligned_type(type_t *type, int alignment)
338 type = skip_typeref(type);
339 if (alignment > type->base.alignment) {
340 type_t *copy = duplicate_type(type);
341 copy->base.alignment = alignment;
342 type = identify_new_type(copy);
348 * Creates a Firm type for an atomic type
350 static ir_type *create_atomic_type(atomic_type_kind_t akind, int alignment)
352 ir_mode *mode = atomic_modes[akind];
353 ident *id = get_mode_ident(mode);
354 ir_type *irtype = new_type_primitive(id, mode);
356 set_type_alignment_bytes(irtype, alignment);
362 * Creates a Firm type for a complex type
364 static ir_type *create_complex_type(const complex_type_t *type)
366 atomic_type_kind_t kind = type->akind;
367 ir_mode *mode = atomic_modes[kind];
368 ident *id = get_mode_ident(mode);
372 /* FIXME: finish the array */
377 * Creates a Firm type for an imaginary type
379 static ir_type *create_imaginary_type(const imaginary_type_t *type)
381 atomic_type_kind_t kind = type->akind;
382 ir_mode *mode = atomic_modes[kind];
383 ident *id = get_mode_ident(mode);
384 ir_type *irtype = new_type_primitive(id, mode);
386 set_type_alignment_bytes(irtype, type->base.alignment);
392 * return type of a parameter (and take transparent union gnu extension into
395 static type_t *get_parameter_type(type_t *type)
397 type = skip_typeref(type);
398 if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
399 compound_t *compound = type->compound.compound;
400 type = compound->members.entities->declaration.type;
406 static ir_type *create_method_type(const function_type_t *function_type)
408 type_t *return_type = skip_typeref(function_type->return_type);
410 ident *id = id_unique("functiontype.%u");
411 int n_parameters = count_parameters(function_type);
412 int n_results = return_type == type_void ? 0 : 1;
413 ir_type *irtype = new_type_method(id, n_parameters, n_results);
415 if (return_type != type_void) {
416 ir_type *restype = get_ir_type(return_type);
417 set_method_res_type(irtype, 0, restype);
420 function_parameter_t *parameter = function_type->parameters;
422 for ( ; parameter != NULL; parameter = parameter->next) {
423 type_t *type = get_parameter_type(parameter->type);
424 ir_type *p_irtype = get_ir_type(type);
425 set_method_param_type(irtype, n, p_irtype);
429 if (function_type->variadic || function_type->unspecified_parameters) {
430 set_method_variadicity(irtype, variadicity_variadic);
433 unsigned cc = get_method_calling_convention(irtype);
434 switch (function_type->calling_convention) {
435 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
438 set_method_calling_convention(irtype, SET_CDECL(cc));
442 if (function_type->variadic || function_type->unspecified_parameters)
445 /* only non-variadic function can use stdcall, else use cdecl */
446 set_method_calling_convention(irtype, SET_STDCALL(cc));
450 if (function_type->variadic || function_type->unspecified_parameters)
452 /* only non-variadic function can use fastcall, else use cdecl */
453 set_method_calling_convention(irtype, SET_FASTCALL(cc));
457 /* Hmm, leave default, not accepted by the parser yet. */
464 static ir_type *create_pointer_type(pointer_type_t *type)
466 type_t *points_to = type->points_to;
467 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
468 ir_type *ir_type = new_type_pointer(id_unique("pointer.%u"),
469 ir_points_to, mode_P_data);
474 static ir_type *create_reference_type(reference_type_t *type)
476 type_t *refers_to = type->refers_to;
477 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
478 ir_type *ir_type = new_type_pointer(id_unique("reference.%u"),
479 ir_refers_to, mode_P_data);
484 static ir_type *create_array_type(array_type_t *type)
486 type_t *element_type = type->element_type;
487 ir_type *ir_element_type = get_ir_type(element_type);
489 ident *id = id_unique("array.%u");
490 ir_type *ir_type = new_type_array(id, 1, ir_element_type);
492 const int align = get_type_alignment_bytes(ir_element_type);
493 set_type_alignment_bytes(ir_type, align);
495 if (type->size_constant) {
496 int n_elements = type->size;
498 set_array_bounds_int(ir_type, 0, 0, n_elements);
500 size_t elemsize = get_type_size_bytes(ir_element_type);
501 if (elemsize % align > 0) {
502 elemsize += align - (elemsize % align);
504 set_type_size_bytes(ir_type, n_elements * elemsize);
506 set_array_lower_bound_int(ir_type, 0, 0);
508 set_type_state(ir_type, layout_fixed);
514 * Return the signed integer type of size bits.
516 * @param size the size
518 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
521 static ir_mode *s_modes[64 + 1] = {NULL, };
525 if (size <= 0 || size > 64)
528 mode = s_modes[size];
532 snprintf(name, sizeof(name), "bf_I%u", size);
533 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
534 size <= 32 ? 32 : size );
535 s_modes[size] = mode;
539 snprintf(name, sizeof(name), "I%u", size);
540 ident *id = new_id_from_str(name);
541 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
542 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
543 set_primitive_base_type(res, base_tp);
549 * Return the unsigned integer type of size bits.
551 * @param size the size
553 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
556 static ir_mode *u_modes[64 + 1] = {NULL, };
560 if (size <= 0 || size > 64)
563 mode = u_modes[size];
567 snprintf(name, sizeof(name), "bf_U%u", size);
568 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
569 size <= 32 ? 32 : size );
570 u_modes[size] = mode;
575 snprintf(name, sizeof(name), "U%u", size);
576 ident *id = new_id_from_str(name);
577 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
578 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
579 set_primitive_base_type(res, base_tp);
584 static ir_type *create_bitfield_type(bitfield_type_t *const type)
586 type_t *base = skip_typeref(type->base_type);
587 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
588 ir_type *irbase = get_ir_type(base);
590 unsigned size = type->bit_size;
592 assert(!is_type_float(base));
593 if (is_type_signed(base)) {
594 return get_signed_int_type_for_bit_size(irbase, size);
596 return get_unsigned_int_type_for_bit_size(irbase, size);
600 #define INVALID_TYPE ((ir_type_ptr)-1)
603 COMPOUND_IS_STRUCT = false,
604 COMPOUND_IS_UNION = true
608 * Construct firm type from ast struct type.
610 * As anonymous inner structs get flattened to a single firm type, we might get
611 * irtype, outer_offset and out_align passed (they represent the position of
612 * the anonymous inner struct inside the resulting firm struct)
614 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
615 size_t *outer_offset, size_t *outer_align,
616 bool incomplete, bool is_union)
618 compound_t *compound = type->compound;
620 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
621 return compound->irtype;
624 size_t align_all = 1;
626 size_t bit_offset = 0;
629 if (irtype == NULL) {
630 symbol_t *symbol = compound->base.symbol;
632 if (symbol != NULL) {
633 id = new_id_from_str(symbol->string);
636 id = id_unique("__anonymous_union.%u");
638 id = id_unique("__anonymous_struct.%u");
641 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
644 irtype = new_d_type_union(id, dbgi);
646 irtype = new_d_type_struct(id, dbgi);
649 compound->irtype_complete = false;
650 compound->irtype = irtype;
652 offset = *outer_offset;
653 align_all = *outer_align;
659 compound->irtype_complete = true;
661 entity_t *entry = compound->members.entities;
662 for ( ; entry != NULL; entry = entry->base.next) {
663 if (entry->kind != ENTITY_COMPOUND_MEMBER)
666 size_t prev_offset = offset;
668 symbol_t *symbol = entry->base.symbol;
669 type_t *entry_type = skip_typeref(entry->declaration.type);
671 = get_aligned_type(entry_type, entry->compound_member.alignment);
672 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
675 if (symbol != NULL) {
676 ident = new_id_from_str(symbol->string);
678 if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
679 create_compound_type(&entry_type->compound, irtype, &offset,
680 &align_all, false, COMPOUND_IS_STRUCT);
681 goto finished_member;
682 } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
683 create_compound_type(&entry_type->compound, irtype, &offset,
684 &align_all, false, COMPOUND_IS_UNION);
685 goto finished_member;
687 assert(entry_type->kind == TYPE_BITFIELD);
689 ident = id_unique("anon.%u");
692 ir_type *base_irtype;
693 if (entry_type->kind == TYPE_BITFIELD) {
694 base_irtype = get_ir_type(entry_type->bitfield.base_type);
696 base_irtype = get_ir_type(entry_type);
699 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
700 size_t misalign = offset % entry_alignment;
702 ir_type *entry_irtype = get_ir_type(entry_type);
703 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
706 size_t bits_remainder;
707 if (entry_type->kind == TYPE_BITFIELD) {
708 size_t size_bits = entry_type->bitfield.bit_size;
709 size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
711 if (size_bits > rest_size_bits) {
712 /* start a new bucket */
713 offset += entry_alignment - misalign;
719 /* put into current bucket */
720 base = offset - misalign;
721 bits_remainder = misalign * 8 + bit_offset;
724 offset += size_bits / 8;
725 bit_offset = bit_offset + (size_bits % 8);
727 size_t entry_size = get_type_size_bytes(base_irtype);
728 if (misalign > 0 || bit_offset > 0)
729 offset += entry_alignment - misalign;
733 offset += entry_size;
737 if (entry_alignment > align_all) {
738 if (entry_alignment % align_all != 0) {
739 panic("uneven alignments not supported yet");
741 align_all = entry_alignment;
744 set_entity_offset(entity, base);
745 set_entity_offset_bits_remainder(entity,
746 (unsigned char) bits_remainder);
747 //add_struct_member(irtype, entity);
748 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
749 assert(entry->compound_member.entity == NULL);
750 entry->compound_member.entity = entity;
754 size_t entry_size = offset - prev_offset;
755 if (entry_size > size) {
767 size_t misalign = offset % align_all;
768 if (misalign > 0 || bit_offset > 0) {
769 size += align_all - misalign;
772 if (outer_offset != NULL) {
774 *outer_offset = offset;
776 *outer_offset += size;
779 if (align_all > *outer_align) {
780 if (align_all % *outer_align != 0) {
781 panic("uneven alignments not supported yet");
783 *outer_align = align_all;
786 set_type_alignment_bytes(irtype, align_all);
787 set_type_size_bytes(irtype, size);
788 set_type_state(irtype, layout_fixed);
794 static ir_type *create_enum_type(enum_type_t *const type)
796 type->base.firm_type = ir_type_int;
798 ir_mode *const mode = mode_int;
799 tarval *const one = get_mode_one(mode);
800 tarval * tv_next = get_tarval_null(mode);
802 bool constant_folding_old = constant_folding;
803 constant_folding = true;
805 enum_t *enume = type->enume;
806 entity_t *entry = enume->base.next;
807 for (; entry != NULL; entry = entry->base.next) {
808 if (entry->kind != ENTITY_ENUM_VALUE)
811 expression_t *const init = entry->enum_value.value;
813 ir_node *const cnst = expression_to_firm(init);
814 if (!is_Const(cnst)) {
815 panic("couldn't fold constant");
817 tv_next = get_Const_tarval(cnst);
819 entry->enum_value.tv = tv_next;
820 tv_next = tarval_add(tv_next, one);
823 constant_folding = constant_folding_old;
825 return create_atomic_type(type->akind, type->base.alignment);
828 static ir_type *get_ir_type_incomplete(type_t *type)
830 assert(type != NULL);
831 type = skip_typeref(type);
833 if (type->base.firm_type != NULL) {
834 assert(type->base.firm_type != INVALID_TYPE);
835 return type->base.firm_type;
838 switch (type->kind) {
839 case TYPE_COMPOUND_STRUCT:
840 return create_compound_type(&type->compound, NULL, NULL, NULL,
841 true, COMPOUND_IS_STRUCT);
842 case TYPE_COMPOUND_UNION:
843 return create_compound_type(&type->compound, NULL, NULL, NULL,
844 true, COMPOUND_IS_UNION);
846 return get_ir_type(type);
850 ir_type *get_ir_type(type_t *type)
852 assert(type != NULL);
854 type = skip_typeref(type);
856 if (type->base.firm_type != NULL) {
857 assert(type->base.firm_type != INVALID_TYPE);
858 return type->base.firm_type;
861 ir_type *firm_type = NULL;
862 switch (type->kind) {
864 /* Happens while constant folding, when there was an error */
865 return create_atomic_type(ATOMIC_TYPE_VOID, 0);
868 firm_type = create_atomic_type(type->atomic.akind,
869 type->base.alignment);
872 firm_type = create_complex_type(&type->complex);
875 firm_type = create_imaginary_type(&type->imaginary);
878 firm_type = create_method_type(&type->function);
881 firm_type = create_pointer_type(&type->pointer);
884 firm_type = create_reference_type(&type->reference);
887 firm_type = create_array_type(&type->array);
889 case TYPE_COMPOUND_STRUCT:
890 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
891 false, COMPOUND_IS_STRUCT);
893 case TYPE_COMPOUND_UNION:
894 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
895 false, COMPOUND_IS_UNION);
898 firm_type = create_enum_type(&type->enumt);
901 firm_type = get_ir_type(type->builtin.real_type);
904 firm_type = create_bitfield_type(&type->bitfield);
912 if (firm_type == NULL)
913 panic("unknown type found");
915 type->base.firm_type = firm_type;
919 static ir_mode *get_ir_mode_storage(type_t *type)
921 ir_type *irtype = get_ir_type(type);
923 /* firm doesn't report a mode for arrays somehow... */
924 if (is_Array_type(irtype)) {
928 ir_mode *mode = get_type_mode(irtype);
929 assert(mode != NULL);
933 static ir_mode *get_ir_mode_arithmetic(type_t *type)
935 ir_mode *mode = get_ir_mode_storage(type);
936 if (mode_is_float(mode) && mode_float_arithmetic != NULL) {
937 return mode_float_arithmetic;
943 /** Names of the runtime functions. */
944 static const struct {
945 int id; /**< the rts id */
946 int n_res; /**< number of return values */
947 const char *name; /**< the name of the rts function */
948 int n_params; /**< number of parameters */
949 unsigned flags; /**< language flags */
951 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
952 { rts_abort, 0, "abort", 0, _C89 },
953 { rts_alloca, 1, "alloca", 1, _ALL },
954 { rts_abs, 1, "abs", 1, _C89 },
955 { rts_labs, 1, "labs", 1, _C89 },
956 { rts_llabs, 1, "llabs", 1, _C99 },
957 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
959 { rts_fabs, 1, "fabs", 1, _C89 },
960 { rts_sqrt, 1, "sqrt", 1, _C89 },
961 { rts_cbrt, 1, "cbrt", 1, _C99 },
962 { rts_exp, 1, "exp", 1, _C89 },
963 { rts_exp2, 1, "exp2", 1, _C89 },
964 { rts_exp10, 1, "exp10", 1, _GNUC },
965 { rts_log, 1, "log", 1, _C89 },
966 { rts_log2, 1, "log2", 1, _C89 },
967 { rts_log10, 1, "log10", 1, _C89 },
968 { rts_pow, 1, "pow", 2, _C89 },
969 { rts_sin, 1, "sin", 1, _C89 },
970 { rts_cos, 1, "cos", 1, _C89 },
971 { rts_tan, 1, "tan", 1, _C89 },
972 { rts_asin, 1, "asin", 1, _C89 },
973 { rts_acos, 1, "acos", 1, _C89 },
974 { rts_atan, 1, "atan", 1, _C89 },
975 { rts_sinh, 1, "sinh", 1, _C89 },
976 { rts_cosh, 1, "cosh", 1, _C89 },
977 { rts_tanh, 1, "tanh", 1, _C89 },
979 { rts_fabsf, 1, "fabsf", 1, _C99 },
980 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
981 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
982 { rts_expf, 1, "expf", 1, _C99 },
983 { rts_exp2f, 1, "exp2f", 1, _C99 },
984 { rts_exp10f, 1, "exp10f", 1, _GNUC },
985 { rts_logf, 1, "logf", 1, _C99 },
986 { rts_log2f, 1, "log2f", 1, _C99 },
987 { rts_log10f, 1, "log10f", 1, _C99 },
988 { rts_powf, 1, "powf", 2, _C99 },
989 { rts_sinf, 1, "sinf", 1, _C99 },
990 { rts_cosf, 1, "cosf", 1, _C99 },
991 { rts_tanf, 1, "tanf", 1, _C99 },
992 { rts_asinf, 1, "asinf", 1, _C99 },
993 { rts_acosf, 1, "acosf", 1, _C99 },
994 { rts_atanf, 1, "atanf", 1, _C99 },
995 { rts_sinhf, 1, "sinhf", 1, _C99 },
996 { rts_coshf, 1, "coshf", 1, _C99 },
997 { rts_tanhf, 1, "tanhf", 1, _C99 },
999 { rts_fabsl, 1, "fabsl", 1, _C99 },
1000 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
1001 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
1002 { rts_expl, 1, "expl", 1, _C99 },
1003 { rts_exp2l, 1, "exp2l", 1, _C99 },
1004 { rts_exp10l, 1, "exp10l", 1, _GNUC },
1005 { rts_logl, 1, "logl", 1, _C99 },
1006 { rts_log2l, 1, "log2l", 1, _C99 },
1007 { rts_log10l, 1, "log10l", 1, _C99 },
1008 { rts_powl, 1, "powl", 2, _C99 },
1009 { rts_sinl, 1, "sinl", 1, _C99 },
1010 { rts_cosl, 1, "cosl", 1, _C99 },
1011 { rts_tanl, 1, "tanl", 1, _C99 },
1012 { rts_asinl, 1, "asinl", 1, _C99 },
1013 { rts_acosl, 1, "acosl", 1, _C99 },
1014 { rts_atanl, 1, "atanl", 1, _C99 },
1015 { rts_sinhl, 1, "sinhl", 1, _C99 },
1016 { rts_coshl, 1, "coshl", 1, _C99 },
1017 { rts_tanhl, 1, "tanhl", 1, _C99 },
1019 { rts_memcpy, 1, "memcpy", 3, _C89 }, /* HMM, man say its C99 */
1020 { rts_memset, 1, "memset", 3, _C89 }, /* HMM, man say its C99 */
1021 { rts_strcmp, 1, "strcmp", 2, _C89 },
1022 { rts_strncmp, 1, "strncmp", 3, _C89 }
1025 static ident *rts_idents[lengthof(rts_data)];
1027 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
1030 * Handle GNU attributes for entities
1032 * @param ent the entity
1033 * @param decl the routine declaration
1035 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
1037 assert(is_declaration(entity));
1038 decl_modifiers_t modifiers = entity->declaration.modifiers;
1039 if (modifiers & DM_PURE) {
1040 /* TRUE if the declaration includes the GNU
1041 __attribute__((pure)) specifier. */
1042 set_entity_additional_property(irentity, mtp_property_pure);
1044 if (modifiers & DM_CONST) {
1045 set_entity_additional_property(irentity, mtp_property_const);
1046 have_const_functions = true;
1048 if (modifiers & DM_USED) {
1049 /* TRUE if the declaration includes the GNU
1050 __attribute__((used)) specifier. */
1051 set_entity_stickyness(irentity, stickyness_sticky);
1055 static bool is_main(entity_t *entity)
1057 static symbol_t *sym_main = NULL;
1058 if (sym_main == NULL) {
1059 sym_main = symbol_table_insert("main");
1062 if (entity->base.symbol != sym_main)
1064 /* must be in outermost scope */
1065 if (entity->base.parent_scope != ¤t_translation_unit->scope)
1072 * Creates an entity representing a function.
1074 * @param declaration the function declaration
1076 static ir_entity *get_function_entity(entity_t *entity)
1078 assert(entity->kind == ENTITY_FUNCTION);
1079 if (entity->function.entity != NULL) {
1080 return entity->function.entity;
1083 if (is_main(entity)) {
1084 /* force main to C linkage */
1085 type_t *type = entity->declaration.type;
1086 assert(is_type_function(type));
1087 if (type->function.linkage != LINKAGE_C) {
1088 type_t *new_type = duplicate_type(type);
1089 new_type->function.linkage = LINKAGE_C;
1090 type = identify_new_type(new_type);
1091 entity->declaration.type = type;
1095 symbol_t *symbol = entity->base.symbol;
1096 ident *id = new_id_from_str(symbol->string);
1098 ir_type *global_type = get_glob_type();
1099 ir_type *ir_type_method = get_ir_type(entity->declaration.type);
1100 bool const has_body = entity->function.statement != NULL;
1102 /* already an entity defined? */
1103 ir_entity *irentity = entitymap_get(&entitymap, symbol);
1104 if (irentity != NULL) {
1105 if (get_entity_visibility(irentity) == visibility_external_allocated
1107 set_entity_visibility(irentity, visibility_external_visible);
1109 goto entity_created;
1112 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1113 irentity = new_d_entity(global_type, id, ir_type_method, dbgi);
1114 set_entity_ld_ident(irentity, create_ld_ident(entity));
1116 handle_gnu_attributes_ent(irentity, entity);
1118 /* static inline => local
1119 * extern inline => local
1120 * inline without definition => local
1121 * inline with definition => external_visible */
1122 storage_class_tag_t const storage_class
1123 = (storage_class_tag_t) entity->declaration.storage_class;
1124 bool const is_inline = entity->function.is_inline;
1125 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1126 set_entity_visibility(irentity, visibility_external_visible);
1127 } else if (storage_class == STORAGE_CLASS_STATIC ||
1128 (is_inline && has_body)) {
1130 /* this entity was declared, but is defined nowhere */
1131 set_entity_peculiarity(irentity, peculiarity_description);
1133 set_entity_visibility(irentity, visibility_local);
1134 } else if (has_body) {
1135 set_entity_visibility(irentity, visibility_external_visible);
1137 set_entity_visibility(irentity, visibility_external_allocated);
1139 set_entity_allocation(irentity, allocation_static);
1141 /* We should check for file scope here, but as long as we compile C only
1142 this is not needed. */
1143 if (! firm_opt.freestanding) {
1144 /* check for a known runtime function */
1145 for (size_t i = 0; i < lengthof(rts_data); ++i) {
1146 if (id != rts_idents[i])
1149 /* ignore those rts functions not necessary needed for current mode */
1150 if ((c_mode & rts_data[i].flags) == 0)
1152 assert(rts_entities[rts_data[i].id] == NULL);
1153 rts_entities[rts_data[i].id] = irentity;
1157 entitymap_insert(&entitymap, symbol, irentity);
1160 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1161 entity->function.entity = irentity;
1166 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1168 ir_mode *value_mode = get_irn_mode(value);
1170 if (value_mode == dest_mode || is_Bad(value))
1173 if (dest_mode == mode_b) {
1174 ir_node *zero = new_Const(get_mode_null(value_mode));
1175 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
1176 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1180 return new_d_Conv(dbgi, value, dest_mode);
1184 * Creates a Const node representing a constant.
1186 static ir_node *const_to_firm(const const_expression_t *cnst)
1188 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1189 type_t *type = skip_typeref(cnst->base.type);
1190 ir_mode *mode = get_ir_mode_storage(type);
1195 if (mode_is_float(mode)) {
1196 tv = new_tarval_from_double(cnst->v.float_value, mode);
1198 if (mode_is_signed(mode)) {
1199 len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1201 len = snprintf(buf, sizeof(buf), "%llu",
1202 (unsigned long long) cnst->v.int_value);
1204 tv = new_tarval_from_str(buf, len, mode);
1207 ir_node *res = new_d_Const(dbgi, tv);
1208 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
1209 return create_conv(dbgi, res, mode_arith);
1213 * Creates a Const node representing a character constant.
1215 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1217 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1218 ir_mode *mode = get_ir_mode_arithmetic(cnst->base.type);
1221 size_t const size = cnst->v.character.size;
1222 if (size == 1 && char_is_signed) {
1223 v = (signed char)cnst->v.character.begin[0];
1226 for (size_t i = 0; i < size; ++i) {
1227 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1231 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1232 tarval *tv = new_tarval_from_str(buf, len, mode);
1234 return new_d_Const(dbgi, tv);
1238 * Creates a Const node representing a wide character constant.
1240 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1242 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1243 ir_mode *mode = get_ir_mode_arithmetic(cnst->base.type);
1245 long long int v = cnst->v.wide_character.begin[0];
1248 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1249 tarval *tv = new_tarval_from_str(buf, len, mode);
1251 return new_d_Const(dbgi, tv);
1255 * Creates a SymConst for a given entity.
1257 * @param dbgi debug info
1258 * @param mode the (reference) mode for the SymConst
1259 * @param entity the entity
1261 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1264 assert(entity != NULL);
1265 union symconst_symbol sym;
1266 sym.entity_p = entity;
1267 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1271 * Creates a SymConst node representing a string constant.
1273 * @param src_pos the source position of the string constant
1274 * @param id_prefix a prefix for the name of the generated string constant
1275 * @param value the value of the string constant
1277 static ir_node *string_to_firm(const source_position_t *const src_pos,
1278 const char *const id_prefix,
1279 const string_t *const value)
1281 ir_type *const global_type = get_glob_type();
1282 dbg_info *const dbgi = get_dbg_info(src_pos);
1283 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1284 ir_type_const_char, dbgi);
1286 ident *const id = id_unique(id_prefix);
1287 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1288 set_entity_ld_ident(entity, id);
1289 set_entity_variability(entity, variability_constant);
1290 set_entity_allocation(entity, allocation_static);
1292 ir_type *const elem_type = ir_type_const_char;
1293 ir_mode *const mode = get_type_mode(elem_type);
1295 const char* const string = value->begin;
1296 const size_t slen = value->size;
1298 set_array_lower_bound_int(type, 0, 0);
1299 set_array_upper_bound_int(type, 0, slen);
1300 set_type_size_bytes(type, slen);
1301 set_type_state(type, layout_fixed);
1303 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1304 for (size_t i = 0; i < slen; ++i) {
1305 tvs[i] = new_tarval_from_long(string[i], mode);
1308 set_array_entity_values(entity, tvs, slen);
1311 return create_symconst(dbgi, mode_P_data, entity);
1315 * Creates a SymConst node representing a string literal.
1317 * @param literal the string literal
1319 static ir_node *string_literal_to_firm(
1320 const string_literal_expression_t* literal)
1322 return string_to_firm(&literal->base.source_position, "Lstr.%u",
1327 * Creates a SymConst node representing a wide string literal.
1329 * @param literal the wide string literal
1331 static ir_node *wide_string_literal_to_firm(
1332 const wide_string_literal_expression_t* const literal)
1334 ir_type *const global_type = get_glob_type();
1335 ir_type *const elem_type = ir_type_wchar_t;
1336 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1337 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1340 ident *const id = id_unique("Lstr.%u");
1341 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1342 set_entity_ld_ident(entity, id);
1343 set_entity_variability(entity, variability_constant);
1344 set_entity_allocation(entity, allocation_static);
1346 ir_mode *const mode = get_type_mode(elem_type);
1348 const wchar_rep_t *const string = literal->value.begin;
1349 const size_t slen = literal->value.size;
1351 set_array_lower_bound_int(type, 0, 0);
1352 set_array_upper_bound_int(type, 0, slen);
1353 set_type_size_bytes(type, slen);
1354 set_type_state(type, layout_fixed);
1356 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1357 for (size_t i = 0; i < slen; ++i) {
1358 tvs[i] = new_tarval_from_long(string[i], mode);
1361 set_array_entity_values(entity, tvs, slen);
1364 return create_symconst(dbgi, mode_P_data, entity);
1367 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1368 ir_node *const addr)
1370 ir_type *irtype = get_ir_type(type);
1371 if (is_compound_type(irtype)
1372 || is_Method_type(irtype)
1373 || is_Array_type(irtype)) {
1377 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1378 ? cons_volatile : cons_none;
1379 ir_mode *const mode = get_type_mode(irtype);
1380 ir_node *const memory = get_store();
1381 ir_node *const load = new_d_Load(dbgi, memory, addr, mode, flags);
1382 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1383 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1385 set_store(load_mem);
1387 ir_mode *const mode_arithmetic = get_ir_mode_arithmetic(type);
1388 return create_conv(dbgi, load_res, mode_arithmetic);
1392 * Creates a strict Conv if necessary.
1394 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1396 ir_mode *mode = get_irn_mode(node);
1398 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1400 if (!mode_is_float(mode))
1403 /* check if there is already a Conv */
1404 if (is_Conv(node)) {
1405 /* convert it into a strict Conv */
1406 set_Conv_strict(node, 1);
1410 /* otherwise create a new one */
1411 return new_d_strictConv(dbgi, node, mode);
1414 static ir_node *get_global_var_address(dbg_info *const dbgi,
1415 const entity_t *const entity)
1417 assert(entity->kind == ENTITY_VARIABLE);
1418 assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1420 ir_entity *const irentity = entity->variable.v.entity;
1421 if (entity->variable.thread_local) {
1422 ir_node *const no_mem = new_NoMem();
1423 ir_node *const tls = get_irg_tls(current_ir_graph);
1424 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1426 return create_symconst(dbgi, mode_P_data, irentity);
1431 * Returns the correct base address depending on whether it is a parameter or a
1432 * normal local variable.
1434 static ir_node *get_local_frame(ir_entity *const ent)
1436 ir_graph *const irg = current_ir_graph;
1437 const ir_type *const owner = get_entity_owner(ent);
1438 if (owner == get_irg_frame_type(irg)) {
1439 return get_irg_frame(irg);
1441 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1442 return get_irg_value_param_base(irg);
1447 * Keep all memory edges of the given block.
1449 static void keep_all_memory(ir_node *block)
1451 ir_node *old = get_cur_block();
1453 set_cur_block(block);
1454 keep_alive(get_store());
1455 /* TODO: keep all memory edges from restricted pointers */
1459 static ir_node *reference_expression_enum_value_to_firm(
1460 const reference_expression_t *ref)
1462 entity_t *entity = ref->entity;
1463 type_t *type = skip_typeref(entity->enum_value.enum_type);
1464 /* make sure the type is constructed */
1465 (void) get_ir_type(type);
1467 return new_Const(entity->enum_value.tv);
1470 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1472 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1473 entity_t *entity = ref->entity;
1474 assert(is_declaration(entity));
1475 type_t *type = skip_typeref(entity->declaration.type);
1477 /* make sure the type is constructed */
1478 (void) get_ir_type(type);
1480 switch ((declaration_kind_t) entity->declaration.kind) {
1481 case DECLARATION_KIND_UNKNOWN:
1484 case DECLARATION_KIND_LOCAL_VARIABLE: {
1485 ir_mode *const mode = get_ir_mode_storage(type);
1486 ir_node *const value = get_value(entity->variable.v.value_number, mode);
1487 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1489 case DECLARATION_KIND_PARAMETER: {
1490 ir_mode *const mode = get_ir_mode_storage(type);
1491 ir_node *const value = get_value(entity->parameter.v.value_number,mode);
1492 return create_conv(NULL, value, get_ir_mode_arithmetic(type));
1494 case DECLARATION_KIND_FUNCTION: {
1495 ir_mode *const mode = get_ir_mode_storage(type);
1496 return create_symconst(dbgi, mode, entity->function.entity);
1498 case DECLARATION_KIND_INNER_FUNCTION: {
1499 ir_mode *const mode = get_ir_mode_storage(type);
1500 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1501 /* inner function not using the closure */
1502 return create_symconst(dbgi, mode, entity->function.entity);
1504 /* TODO: need trampoline here */
1505 panic("Trampoline code not implemented");
1506 return create_symconst(dbgi, mode, entity->function.entity);
1509 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1510 ir_node *const addr = get_global_var_address(dbgi, entity);
1511 return deref_address(dbgi, entity->declaration.type, addr);
1514 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1515 ir_entity *irentity = entity->variable.v.entity;
1516 ir_node *frame = get_local_frame(irentity);
1517 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1518 return deref_address(dbgi, entity->declaration.type, sel);
1520 case DECLARATION_KIND_PARAMETER_ENTITY: {
1521 ir_entity *irentity = entity->parameter.v.entity;
1522 ir_node *frame = get_local_frame(irentity);
1523 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1524 return deref_address(dbgi, entity->declaration.type, sel);
1527 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1528 return entity->variable.v.vla_base;
1530 case DECLARATION_KIND_COMPOUND_MEMBER:
1531 panic("not implemented reference type");
1534 panic("reference to declaration with unknown type found");
1537 static ir_node *reference_addr(const reference_expression_t *ref)
1539 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1540 entity_t *entity = ref->entity;
1541 assert(is_declaration(entity));
1543 switch((declaration_kind_t) entity->declaration.kind) {
1544 case DECLARATION_KIND_UNKNOWN:
1546 case DECLARATION_KIND_PARAMETER:
1547 case DECLARATION_KIND_LOCAL_VARIABLE:
1548 /* you can store to a local variable (so we don't panic but return NULL
1549 * as an indicator for no real address) */
1551 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1552 ir_node *const addr = get_global_var_address(dbgi, entity);
1555 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1556 ir_entity *irentity = entity->variable.v.entity;
1557 ir_node *frame = get_local_frame(irentity);
1558 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1562 case DECLARATION_KIND_PARAMETER_ENTITY: {
1563 ir_entity *irentity = entity->parameter.v.entity;
1564 ir_node *frame = get_local_frame(irentity);
1565 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1570 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1571 return entity->variable.v.vla_base;
1573 case DECLARATION_KIND_FUNCTION: {
1574 type_t *const type = skip_typeref(entity->declaration.type);
1575 ir_mode *const mode = get_ir_mode_storage(type);
1576 return create_symconst(dbgi, mode, entity->function.entity);
1579 case DECLARATION_KIND_INNER_FUNCTION:
1580 case DECLARATION_KIND_COMPOUND_MEMBER:
1581 panic("not implemented reference type");
1584 panic("reference to declaration with unknown type found");
1588 * Transform calls to builtin functions.
1590 static ir_node *process_builtin_call(const call_expression_t *call)
1592 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1594 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1595 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1597 type_t *type = skip_typeref(builtin->base.type);
1598 assert(is_type_pointer(type));
1600 type_t *function_type = skip_typeref(type->pointer.points_to);
1601 symbol_t *symbol = builtin->symbol;
1603 switch(symbol->ID) {
1604 case T___builtin_alloca: {
1605 if (call->arguments == NULL || call->arguments->next != NULL) {
1606 panic("invalid number of parameters on __builtin_alloca");
1608 expression_t *argument = call->arguments->expression;
1609 ir_node *size = expression_to_firm(argument);
1611 ir_node *store = get_store();
1612 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1614 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1616 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1621 case T___builtin_huge_val:
1622 case T___builtin_inf:
1623 case T___builtin_inff:
1624 case T___builtin_infl: {
1625 type_t *type = function_type->function.return_type;
1626 ir_mode *mode = get_ir_mode_arithmetic(type);
1627 tarval *tv = get_mode_infinite(mode);
1628 ir_node *res = new_d_Const(dbgi, tv);
1631 case T___builtin_nan:
1632 case T___builtin_nanf:
1633 case T___builtin_nanl: {
1634 /* Ignore string for now... */
1635 assert(is_type_function(function_type));
1636 type_t *type = function_type->function.return_type;
1637 ir_mode *mode = get_ir_mode_arithmetic(type);
1638 tarval *tv = get_mode_NAN(mode);
1639 ir_node *res = new_d_Const(dbgi, tv);
1642 case T___builtin_expect: {
1643 expression_t *argument = call->arguments->expression;
1644 return _expression_to_firm(argument);
1646 case T___builtin_va_end:
1647 /* evaluate the argument of va_end for its side effects */
1648 _expression_to_firm(call->arguments->expression);
1650 case T___builtin_frame_address: {
1651 long val = fold_constant(call->arguments->expression);
1653 /* this nice case */
1654 return get_irg_frame(current_ir_graph);
1656 panic("__builtin_frame_address(!= 0) not implemented yet");
1658 case T___builtin_return_address:
1659 panic("__builtin_return_address() not implemented yet");
1661 panic("unsupported builtin found");
1666 * Transform a call expression.
1667 * Handles some special cases, like alloca() calls, which must be resolved
1668 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1669 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1672 static ir_node *call_expression_to_firm(const call_expression_t *call)
1674 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1675 assert(get_cur_block() != NULL);
1677 expression_t *function = call->function;
1678 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1679 return process_builtin_call(call);
1681 if (function->kind == EXPR_REFERENCE) {
1682 const reference_expression_t *ref = &function->reference;
1683 entity_t *entity = ref->entity;
1685 if (entity->kind == ENTITY_FUNCTION
1686 && entity->function.entity == rts_entities[rts_alloca]) {
1687 /* handle alloca() call */
1688 expression_t *argument = call->arguments->expression;
1689 ir_node *size = expression_to_firm(argument);
1690 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
1692 size = create_conv(dbgi, size, mode);
1694 ir_node *store = get_store();
1695 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1696 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1698 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1700 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1705 ir_node *callee = expression_to_firm(function);
1707 type_t *type = skip_typeref(function->base.type);
1708 assert(is_type_pointer(type));
1709 pointer_type_t *pointer_type = &type->pointer;
1710 type_t *points_to = skip_typeref(pointer_type->points_to);
1711 assert(is_type_function(points_to));
1712 function_type_t *function_type = &points_to->function;
1714 int n_parameters = 0;
1715 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1716 ir_type *new_method_type = NULL;
1717 if (function_type->variadic || function_type->unspecified_parameters) {
1718 const call_argument_t *argument = call->arguments;
1719 for ( ; argument != NULL; argument = argument->next) {
1723 /* we need to construct a new method type matching the call
1725 int n_res = get_method_n_ress(ir_method_type);
1726 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1727 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1728 n_parameters, n_res, dbgi);
1729 set_method_calling_convention(new_method_type,
1730 get_method_calling_convention(ir_method_type));
1731 set_method_additional_properties(new_method_type,
1732 get_method_additional_properties(ir_method_type));
1733 set_method_variadicity(new_method_type,
1734 get_method_variadicity(ir_method_type));
1736 for (int i = 0; i < n_res; ++i) {
1737 set_method_res_type(new_method_type, i,
1738 get_method_res_type(ir_method_type, i));
1740 argument = call->arguments;
1741 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1742 expression_t *expression = argument->expression;
1743 ir_type *irtype = get_ir_type(expression->base.type);
1744 set_method_param_type(new_method_type, i, irtype);
1746 ir_method_type = new_method_type;
1748 n_parameters = get_method_n_params(ir_method_type);
1751 ir_node *in[n_parameters];
1753 const call_argument_t *argument = call->arguments;
1754 for (int n = 0; n < n_parameters; ++n) {
1755 expression_t *expression = argument->expression;
1756 ir_node *arg_node = expression_to_firm(expression);
1758 type_t *type = skip_typeref(expression->base.type);
1759 if (!is_type_compound(type)) {
1760 ir_mode *mode = get_ir_mode_storage(expression->base.type);
1761 arg_node = create_conv(dbgi, arg_node, mode);
1762 arg_node = do_strict_conv(dbgi, arg_node);
1767 argument = argument->next;
1770 ir_node *store = get_store();
1771 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1773 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1776 type_t *return_type = skip_typeref(function_type->return_type);
1777 ir_node *result = NULL;
1779 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1780 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1782 if (is_type_scalar(return_type)) {
1783 ir_mode *mode = get_ir_mode_storage(return_type);
1784 result = new_d_Proj(dbgi, resproj, mode, 0);
1785 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1786 result = create_conv(NULL, result, mode_arith);
1788 ir_mode *mode = mode_P_data;
1789 result = new_d_Proj(dbgi, resproj, mode, 0);
1793 if (function->kind == EXPR_REFERENCE &&
1794 function->reference.entity->declaration.modifiers & DM_NORETURN) {
1795 /* A dead end: Keep the Call and the Block. Also place all further
1796 * nodes into a new and unreachable block. */
1798 keep_alive(get_cur_block());
1805 static void statement_to_firm(statement_t *statement);
1806 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1808 static ir_node *expression_to_addr(const expression_t *expression);
1809 static ir_node *create_condition_evaluation(const expression_t *expression,
1810 ir_node *true_block,
1811 ir_node *false_block);
1813 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1816 if (!is_type_compound(type)) {
1817 ir_mode *mode = get_ir_mode_storage(type);
1818 value = create_conv(dbgi, value, mode);
1819 value = do_strict_conv(dbgi, value);
1822 ir_node *memory = get_store();
1824 if (is_type_scalar(type)) {
1825 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1826 ? cons_volatile : cons_none;
1827 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1828 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1829 set_store(store_mem);
1831 ir_type *irtype = get_ir_type(type);
1832 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1833 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1834 set_store(copyb_mem);
1838 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1840 tarval *all_one = get_mode_all_one(mode);
1841 int mode_size = get_mode_size_bits(mode);
1843 assert(offset >= 0);
1845 assert(offset + size <= mode_size);
1846 if (size == mode_size) {
1850 long shiftr = get_mode_size_bits(mode) - size;
1851 long shiftl = offset;
1852 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1853 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1854 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1855 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1860 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1861 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1863 ir_type *entity_type = get_entity_type(entity);
1864 ir_type *base_type = get_primitive_base_type(entity_type);
1865 assert(base_type != NULL);
1866 ir_mode *mode = get_type_mode(base_type);
1868 value = create_conv(dbgi, value, mode);
1870 /* kill upper bits of value and shift to right position */
1871 int bitoffset = get_entity_offset_bits_remainder(entity);
1872 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1874 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1875 ir_node *mask_node = new_d_Const(dbgi, mask);
1876 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1877 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1878 ir_node *shiftcount = new_d_Const(dbgi, shiftl);
1879 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1881 /* load current value */
1882 ir_node *mem = get_store();
1883 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1884 set_volatile ? cons_volatile : cons_none);
1885 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1886 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1887 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1888 tarval *inv_mask = tarval_not(shift_mask);
1889 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1890 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1892 /* construct new value and store */
1893 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1894 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1895 set_volatile ? cons_volatile : cons_none);
1896 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1897 set_store(store_mem);
1899 return value_masked;
1902 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1905 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1906 type_t *type = expression->base.type;
1907 ir_mode *mode = get_ir_mode_storage(type);
1908 ir_node *mem = get_store();
1909 ir_node *load = new_d_Load(dbgi, mem, addr, mode, cons_none);
1910 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1911 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1913 load_res = create_conv(dbgi, load_res, mode_int);
1915 set_store(load_mem);
1917 /* kill upper bits */
1918 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1919 ir_entity *entity = expression->compound_entry->compound_member.entity;
1920 int bitoffset = get_entity_offset_bits_remainder(entity);
1921 ir_type *entity_type = get_entity_type(entity);
1922 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1923 long shift_bitsl = machine_size - bitoffset - bitsize;
1924 assert(shift_bitsl >= 0);
1925 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1926 ir_node *countl = new_d_Const(dbgi, tvl);
1927 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1929 long shift_bitsr = bitoffset + shift_bitsl;
1930 assert(shift_bitsr <= (long) machine_size);
1931 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1932 ir_node *countr = new_d_Const(dbgi, tvr);
1934 if (mode_is_signed(mode)) {
1935 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1937 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1940 return create_conv(dbgi, shiftr, mode);
1943 /* make sure the selected compound type is constructed */
1944 static void construct_select_compound(const select_expression_t *expression)
1946 type_t *type = skip_typeref(expression->compound->base.type);
1947 if (is_type_pointer(type)) {
1948 type = type->pointer.points_to;
1950 (void) get_ir_type(type);
1953 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1954 ir_node *value, ir_node *addr)
1956 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1957 type_t *type = skip_typeref(expression->base.type);
1959 if (!is_type_compound(type)) {
1960 ir_mode *mode = get_ir_mode_storage(type);
1961 value = create_conv(dbgi, value, mode);
1962 value = do_strict_conv(dbgi, value);
1965 if (expression->kind == EXPR_REFERENCE) {
1966 const reference_expression_t *ref = &expression->reference;
1968 entity_t *entity = ref->entity;
1969 assert(is_declaration(entity));
1970 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1971 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1972 set_value(entity->variable.v.value_number, value);
1974 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1975 set_value(entity->parameter.v.value_number, value);
1981 addr = expression_to_addr(expression);
1982 assert(addr != NULL);
1984 if (expression->kind == EXPR_SELECT) {
1985 const select_expression_t *select = &expression->select;
1987 construct_select_compound(select);
1989 entity_t *entity = select->compound_entry;
1990 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1991 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1992 ir_entity *irentity = entity->compound_member.entity;
1994 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1995 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
2001 assign_value(dbgi, addr, type, value);
2005 static void set_value_for_expression(const expression_t *expression,
2008 set_value_for_expression_addr(expression, value, NULL);
2011 static ir_node *get_value_from_lvalue(const expression_t *expression,
2014 if (expression->kind == EXPR_REFERENCE) {
2015 const reference_expression_t *ref = &expression->reference;
2017 entity_t *entity = ref->entity;
2018 assert(entity->kind == ENTITY_VARIABLE
2019 || entity->kind == ENTITY_PARAMETER);
2020 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2022 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2023 value_number = entity->variable.v.value_number;
2024 assert(addr == NULL);
2025 type_t *type = skip_typeref(expression->base.type);
2026 ir_mode *mode = get_ir_mode_storage(type);
2027 ir_node *res = get_value(value_number, mode);
2028 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2029 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2030 value_number = entity->parameter.v.value_number;
2031 assert(addr == NULL);
2032 type_t *type = skip_typeref(expression->base.type);
2033 ir_mode *mode = get_ir_mode_storage(type);
2034 ir_node *res = get_value(value_number, mode);
2035 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2039 assert(addr != NULL);
2040 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2043 if (expression->kind == EXPR_SELECT &&
2044 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2045 construct_select_compound(&expression->select);
2046 value = bitfield_extract_to_firm(&expression->select, addr);
2048 value = deref_address(dbgi, expression->base.type, addr);
2055 static ir_node *create_incdec(const unary_expression_t *expression)
2057 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2058 const expression_t *value_expr = expression->value;
2059 ir_node *addr = expression_to_addr(value_expr);
2060 ir_node *value = get_value_from_lvalue(value_expr, addr);
2062 type_t *type = skip_typeref(expression->base.type);
2063 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2066 if (is_type_pointer(type)) {
2067 pointer_type_t *pointer_type = &type->pointer;
2068 offset = get_type_size(pointer_type->points_to);
2070 assert(is_type_arithmetic(type));
2071 offset = new_Const(get_mode_one(mode));
2075 ir_node *store_value;
2076 switch(expression->base.kind) {
2077 case EXPR_UNARY_POSTFIX_INCREMENT:
2079 store_value = new_d_Add(dbgi, value, offset, mode);
2081 case EXPR_UNARY_POSTFIX_DECREMENT:
2083 store_value = new_d_Sub(dbgi, value, offset, mode);
2085 case EXPR_UNARY_PREFIX_INCREMENT:
2086 result = new_d_Add(dbgi, value, offset, mode);
2087 store_value = result;
2089 case EXPR_UNARY_PREFIX_DECREMENT:
2090 result = new_d_Sub(dbgi, value, offset, mode);
2091 store_value = result;
2094 panic("no incdec expr in create_incdec");
2097 set_value_for_expression_addr(value_expr, store_value, addr);
2102 static bool is_local_variable(expression_t *expression)
2104 if (expression->kind != EXPR_REFERENCE)
2106 reference_expression_t *ref_expr = &expression->reference;
2107 entity_t *entity = ref_expr->entity;
2108 if (entity->kind != ENTITY_VARIABLE)
2110 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2111 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2114 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2117 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2118 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2119 case EXPR_BINARY_NOTEQUAL:
2120 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2121 case EXPR_BINARY_ISLESS:
2122 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2123 case EXPR_BINARY_ISLESSEQUAL:
2124 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2125 case EXPR_BINARY_ISGREATER:
2126 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2127 case EXPR_BINARY_ISGREATEREQUAL:
2128 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2129 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2134 panic("trying to get pn_Cmp from non-comparison binexpr type");
2138 * Handle the assume optimizer hint: check if a Confirm
2139 * node can be created.
2141 * @param dbi debug info
2142 * @param expr the IL assume expression
2144 * we support here only some simple cases:
2149 static ir_node *handle_assume_compare(dbg_info *dbi,
2150 const binary_expression_t *expression)
2152 expression_t *op1 = expression->left;
2153 expression_t *op2 = expression->right;
2154 entity_t *var2, *var = NULL;
2155 ir_node *res = NULL;
2158 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2160 if (is_local_variable(op1) && is_local_variable(op2)) {
2161 var = op1->reference.entity;
2162 var2 = op2->reference.entity;
2164 type_t *const type = skip_typeref(var->declaration.type);
2165 ir_mode *const mode = get_ir_mode_storage(type);
2167 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2168 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2170 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2171 set_value(var2->variable.v.value_number, res);
2173 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2174 set_value(var->variable.v.value_number, res);
2180 if (is_local_variable(op1) && is_constant_expression(op2)) {
2181 var = op1->reference.entity;
2183 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2184 cmp_val = get_inversed_pnc(cmp_val);
2185 var = op2->reference.entity;
2190 type_t *const type = skip_typeref(var->declaration.type);
2191 ir_mode *const mode = get_ir_mode_storage(type);
2193 res = get_value(var->variable.v.value_number, mode);
2194 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2195 set_value(var->variable.v.value_number, res);
2201 * Handle the assume optimizer hint.
2203 * @param dbi debug info
2204 * @param expr the IL assume expression
2206 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2208 switch(expression->kind) {
2209 case EXPR_BINARY_EQUAL:
2210 case EXPR_BINARY_NOTEQUAL:
2211 case EXPR_BINARY_LESS:
2212 case EXPR_BINARY_LESSEQUAL:
2213 case EXPR_BINARY_GREATER:
2214 case EXPR_BINARY_GREATEREQUAL:
2215 return handle_assume_compare(dbi, &expression->binary);
2221 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2223 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2224 type_t *type = skip_typeref(expression->base.type);
2226 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2227 return expression_to_addr(expression->value);
2229 const expression_t *value = expression->value;
2231 switch(expression->base.kind) {
2232 case EXPR_UNARY_NEGATE: {
2233 ir_node *value_node = expression_to_firm(value);
2234 ir_mode *mode = get_ir_mode_arithmetic(type);
2235 return new_d_Minus(dbgi, value_node, mode);
2237 case EXPR_UNARY_PLUS:
2238 return expression_to_firm(value);
2239 case EXPR_UNARY_BITWISE_NEGATE: {
2240 ir_node *value_node = expression_to_firm(value);
2241 ir_mode *mode = get_ir_mode_arithmetic(type);
2242 return new_d_Not(dbgi, value_node, mode);
2244 case EXPR_UNARY_NOT: {
2245 ir_node *value_node = _expression_to_firm(value);
2246 value_node = create_conv(dbgi, value_node, mode_b);
2247 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2250 case EXPR_UNARY_DEREFERENCE: {
2251 ir_node *value_node = expression_to_firm(value);
2252 type_t *value_type = skip_typeref(value->base.type);
2253 assert(is_type_pointer(value_type));
2254 type_t *points_to = value_type->pointer.points_to;
2255 return deref_address(dbgi, points_to, value_node);
2257 case EXPR_UNARY_POSTFIX_INCREMENT:
2258 case EXPR_UNARY_POSTFIX_DECREMENT:
2259 case EXPR_UNARY_PREFIX_INCREMENT:
2260 case EXPR_UNARY_PREFIX_DECREMENT:
2261 return create_incdec(expression);
2262 case EXPR_UNARY_CAST: {
2263 ir_node *value_node = expression_to_firm(value);
2264 if (is_type_scalar(type)) {
2265 ir_mode *mode = get_ir_mode_storage(type);
2266 ir_node *node = create_conv(dbgi, value_node, mode);
2267 node = do_strict_conv(dbgi, node);
2268 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2269 node = create_conv(dbgi, node, mode_arith);
2272 /* make sure firm type is constructed */
2273 (void) get_ir_type(type);
2277 case EXPR_UNARY_CAST_IMPLICIT: {
2278 ir_node *value_node = expression_to_firm(value);
2279 if (is_type_scalar(type)) {
2280 ir_mode *mode = get_ir_mode_storage(type);
2281 ir_node *res = create_conv(dbgi, value_node, mode);
2282 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2283 res = create_conv(dbgi, res, mode_arith);
2289 case EXPR_UNARY_ASSUME:
2290 if (firm_opt.confirm)
2291 return handle_assume(dbgi, value);
2298 panic("invalid UNEXPR type found");
2302 * produces a 0/1 depending of the value of a mode_b node
2304 static ir_node *produce_condition_result(const expression_t *expression,
2305 ir_mode *mode, dbg_info *dbgi)
2307 ir_node *cur_block = get_cur_block();
2309 ir_node *one_block = new_immBlock();
2310 set_cur_block(one_block);
2311 ir_node *one = new_Const(get_mode_one(mode));
2312 ir_node *jmp_one = new_d_Jmp(dbgi);
2314 ir_node *zero_block = new_immBlock();
2315 set_cur_block(zero_block);
2316 ir_node *zero = new_Const(get_mode_null(mode));
2317 ir_node *jmp_zero = new_d_Jmp(dbgi);
2319 set_cur_block(cur_block);
2320 create_condition_evaluation(expression, one_block, zero_block);
2321 mature_immBlock(one_block);
2322 mature_immBlock(zero_block);
2324 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2325 new_Block(2, in_cf);
2327 ir_node *in[2] = { one, zero };
2328 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2333 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2334 ir_node *value, type_t *type)
2336 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2337 assert(is_type_pointer(type));
2338 pointer_type_t *const pointer_type = &type->pointer;
2339 type_t *const points_to = skip_typeref(pointer_type->points_to);
2340 unsigned elem_size = get_type_size_const(points_to);
2342 value = create_conv(dbgi, value, mode);
2344 /* gcc extension: allow arithmetic with void * and function * */
2345 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2346 is_type_function(points_to)) {
2350 assert(elem_size >= 1);
2354 ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2355 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode);
2359 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2360 ir_node *left, ir_node *right)
2363 type_t *type_left = skip_typeref(expression->left->base.type);
2364 type_t *type_right = skip_typeref(expression->right->base.type);
2366 expression_kind_t kind = expression->base.kind;
2369 case EXPR_BINARY_SHIFTLEFT:
2370 case EXPR_BINARY_SHIFTRIGHT:
2371 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2372 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2373 mode = get_irn_mode(left);
2374 right = create_conv(dbgi, right, mode_uint);
2377 case EXPR_BINARY_SUB:
2378 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2379 const pointer_type_t *const ptr_type = &type_left->pointer;
2381 mode = get_ir_mode_arithmetic(expression->base.type);
2382 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2383 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2384 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2385 ir_node *const no_mem = new_NoMem();
2386 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2387 mode, op_pin_state_floats);
2388 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2391 case EXPR_BINARY_SUB_ASSIGN:
2392 if (is_type_pointer(type_left)) {
2393 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2394 mode = get_ir_mode_arithmetic(type_left);
2399 case EXPR_BINARY_ADD:
2400 case EXPR_BINARY_ADD_ASSIGN:
2401 if (is_type_pointer(type_left)) {
2402 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2403 mode = get_ir_mode_arithmetic(type_left);
2405 } else if (is_type_pointer(type_right)) {
2406 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2407 mode = get_ir_mode_arithmetic(type_right);
2414 mode = get_ir_mode_arithmetic(type_right);
2415 left = create_conv(dbgi, left, mode);
2420 case EXPR_BINARY_ADD_ASSIGN:
2421 case EXPR_BINARY_ADD:
2422 return new_d_Add(dbgi, left, right, mode);
2423 case EXPR_BINARY_SUB_ASSIGN:
2424 case EXPR_BINARY_SUB:
2425 return new_d_Sub(dbgi, left, right, mode);
2426 case EXPR_BINARY_MUL_ASSIGN:
2427 case EXPR_BINARY_MUL:
2428 return new_d_Mul(dbgi, left, right, mode);
2429 case EXPR_BINARY_BITWISE_AND:
2430 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2431 return new_d_And(dbgi, left, right, mode);
2432 case EXPR_BINARY_BITWISE_OR:
2433 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2434 return new_d_Or(dbgi, left, right, mode);
2435 case EXPR_BINARY_BITWISE_XOR:
2436 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2437 return new_d_Eor(dbgi, left, right, mode);
2438 case EXPR_BINARY_SHIFTLEFT:
2439 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2440 return new_d_Shl(dbgi, left, right, mode);
2441 case EXPR_BINARY_SHIFTRIGHT:
2442 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2443 if (mode_is_signed(mode)) {
2444 return new_d_Shrs(dbgi, left, right, mode);
2446 return new_d_Shr(dbgi, left, right, mode);
2448 case EXPR_BINARY_DIV:
2449 case EXPR_BINARY_DIV_ASSIGN: {
2450 ir_node *pin = new_Pin(new_NoMem());
2453 if (mode_is_float(mode)) {
2454 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2455 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2457 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2458 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2462 case EXPR_BINARY_MOD:
2463 case EXPR_BINARY_MOD_ASSIGN: {
2464 ir_node *pin = new_Pin(new_NoMem());
2465 assert(!mode_is_float(mode));
2466 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2467 op_pin_state_floats);
2468 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2472 panic("unexpected expression kind");
2476 static ir_node *create_lazy_op(const binary_expression_t *expression)
2478 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2479 type_t *type = skip_typeref(expression->base.type);
2480 ir_mode *mode = get_ir_mode_arithmetic(type);
2482 if (is_constant_expression(expression->left)) {
2483 long val = fold_constant(expression->left);
2484 expression_kind_t ekind = expression->base.kind;
2485 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2486 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2488 return new_Const(get_mode_null(mode));
2492 return new_Const(get_mode_one(mode));
2496 if (is_constant_expression(expression->right)) {
2497 long const valr = fold_constant(expression->right);
2499 new_Const(get_mode_one(mode)) :
2500 new_Const(get_mode_null(mode));
2503 return produce_condition_result(expression->right, mode, dbgi);
2506 return produce_condition_result((const expression_t*) expression, mode,
2510 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2511 ir_node *right, ir_mode *mode);
2513 static ir_node *create_assign_binop(const binary_expression_t *expression)
2515 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2516 const expression_t *left_expr = expression->left;
2517 type_t *type = skip_typeref(left_expr->base.type);
2518 ir_mode *left_mode = get_ir_mode_storage(type);
2519 ir_node *right = expression_to_firm(expression->right);
2520 ir_node *left_addr = expression_to_addr(left_expr);
2521 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2522 ir_node *result = create_op(dbgi, expression, left, right);
2524 result = create_conv(dbgi, result, left_mode);
2525 result = do_strict_conv(dbgi, result);
2527 result = set_value_for_expression_addr(left_expr, result, left_addr);
2529 if (!is_type_compound(type)) {
2530 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2531 result = create_conv(dbgi, result, mode_arithmetic);
2536 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2538 expression_kind_t kind = expression->base.kind;
2541 case EXPR_BINARY_EQUAL:
2542 case EXPR_BINARY_NOTEQUAL:
2543 case EXPR_BINARY_LESS:
2544 case EXPR_BINARY_LESSEQUAL:
2545 case EXPR_BINARY_GREATER:
2546 case EXPR_BINARY_GREATEREQUAL:
2547 case EXPR_BINARY_ISGREATER:
2548 case EXPR_BINARY_ISGREATEREQUAL:
2549 case EXPR_BINARY_ISLESS:
2550 case EXPR_BINARY_ISLESSEQUAL:
2551 case EXPR_BINARY_ISLESSGREATER:
2552 case EXPR_BINARY_ISUNORDERED: {
2553 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2554 ir_node *left = expression_to_firm(expression->left);
2555 ir_node *right = expression_to_firm(expression->right);
2556 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2557 long pnc = get_pnc(kind, expression->left->base.type);
2558 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2561 case EXPR_BINARY_ASSIGN: {
2562 ir_node *addr = expression_to_addr(expression->left);
2563 ir_node *right = expression_to_firm(expression->right);
2565 = set_value_for_expression_addr(expression->left, right, addr);
2567 type_t *type = skip_typeref(expression->base.type);
2568 if (!is_type_compound(type)) {
2569 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2570 res = create_conv(NULL, res, mode_arithmetic);
2574 case EXPR_BINARY_ADD:
2575 case EXPR_BINARY_SUB:
2576 case EXPR_BINARY_MUL:
2577 case EXPR_BINARY_DIV:
2578 case EXPR_BINARY_MOD:
2579 case EXPR_BINARY_BITWISE_AND:
2580 case EXPR_BINARY_BITWISE_OR:
2581 case EXPR_BINARY_BITWISE_XOR:
2582 case EXPR_BINARY_SHIFTLEFT:
2583 case EXPR_BINARY_SHIFTRIGHT:
2585 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2586 ir_node *left = expression_to_firm(expression->left);
2587 ir_node *right = expression_to_firm(expression->right);
2588 return create_op(dbgi, expression, left, right);
2590 case EXPR_BINARY_LOGICAL_AND:
2591 case EXPR_BINARY_LOGICAL_OR:
2592 return create_lazy_op(expression);
2593 case EXPR_BINARY_COMMA:
2594 /* create side effects of left side */
2595 (void) expression_to_firm(expression->left);
2596 return _expression_to_firm(expression->right);
2598 case EXPR_BINARY_ADD_ASSIGN:
2599 case EXPR_BINARY_SUB_ASSIGN:
2600 case EXPR_BINARY_MUL_ASSIGN:
2601 case EXPR_BINARY_MOD_ASSIGN:
2602 case EXPR_BINARY_DIV_ASSIGN:
2603 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2604 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2605 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2606 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2607 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2608 return create_assign_binop(expression);
2610 panic("TODO binexpr type");
2614 static ir_node *array_access_addr(const array_access_expression_t *expression)
2616 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2617 ir_node *base_addr = expression_to_firm(expression->array_ref);
2618 ir_node *offset = expression_to_firm(expression->index);
2619 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2620 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2621 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2626 static ir_node *array_access_to_firm(
2627 const array_access_expression_t *expression)
2629 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2630 ir_node *addr = array_access_addr(expression);
2631 type_t *type = revert_automatic_type_conversion(
2632 (const expression_t*) expression);
2633 type = skip_typeref(type);
2635 return deref_address(dbgi, type, addr);
2638 static long get_offsetof_offset(const offsetof_expression_t *expression)
2640 type_t *orig_type = expression->type;
2643 designator_t *designator = expression->designator;
2644 for ( ; designator != NULL; designator = designator->next) {
2645 type_t *type = skip_typeref(orig_type);
2646 /* be sure the type is constructed */
2647 (void) get_ir_type(type);
2649 if (designator->symbol != NULL) {
2650 assert(is_type_compound(type));
2651 symbol_t *symbol = designator->symbol;
2653 compound_t *compound = type->compound.compound;
2654 entity_t *iter = compound->members.entities;
2655 for ( ; iter != NULL; iter = iter->base.next) {
2656 if (iter->base.symbol == symbol) {
2660 assert(iter != NULL);
2662 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2663 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2664 offset += get_entity_offset(iter->compound_member.entity);
2666 orig_type = iter->declaration.type;
2668 expression_t *array_index = designator->array_index;
2669 assert(designator->array_index != NULL);
2670 assert(is_type_array(type));
2672 long index = fold_constant(array_index);
2673 ir_type *arr_type = get_ir_type(type);
2674 ir_type *elem_type = get_array_element_type(arr_type);
2675 long elem_size = get_type_size_bytes(elem_type);
2677 offset += index * elem_size;
2679 orig_type = type->array.element_type;
2686 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2688 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2689 long offset = get_offsetof_offset(expression);
2690 tarval *tv = new_tarval_from_long(offset, mode);
2691 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2693 return new_d_Const(dbgi, tv);
2696 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2697 ir_entity *entity, type_t *type);
2699 static ir_node *compound_literal_to_firm(
2700 const compound_literal_expression_t *expression)
2702 type_t *type = expression->type;
2704 /* create an entity on the stack */
2705 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2707 ident *const id = id_unique("CompLit.%u");
2708 ir_type *const irtype = get_ir_type(type);
2709 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2710 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2711 set_entity_ld_ident(entity, id);
2713 set_entity_variability(entity, variability_uninitialized);
2715 /* create initialisation code */
2716 initializer_t *initializer = expression->initializer;
2717 create_local_initializer(initializer, dbgi, entity, type);
2719 /* create a sel for the compound literal address */
2720 ir_node *frame = get_local_frame(entity);
2721 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2726 * Transform a sizeof expression into Firm code.
2728 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2730 type_t *type = expression->type;
2732 type = expression->tp_expression->base.type;
2733 assert(type != NULL);
2736 type = skip_typeref(type);
2737 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2738 if (is_type_array(type) && type->array.is_vla
2739 && expression->tp_expression != NULL) {
2740 expression_to_firm(expression->tp_expression);
2743 return get_type_size(type);
2746 static entity_t *get_expression_entity(const expression_t *expression)
2748 if (expression->kind != EXPR_REFERENCE)
2751 return expression->reference.entity;
2755 * Transform an alignof expression into Firm code.
2757 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2759 ir_entity *irentity = NULL;
2761 const expression_t *tp_expression = expression->tp_expression;
2762 if (tp_expression != NULL) {
2763 entity_t *entity = get_expression_entity(tp_expression);
2764 if (entity != NULL && is_declaration(entity)) {
2765 switch (entity->declaration.kind) {
2766 case DECLARATION_KIND_UNKNOWN:
2767 panic("unknown entity reference found");
2768 case DECLARATION_KIND_COMPOUND_MEMBER:
2769 irentity = entity->compound_member.entity;
2771 case DECLARATION_KIND_GLOBAL_VARIABLE:
2772 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
2773 irentity = entity->variable.v.entity;
2775 case DECLARATION_KIND_PARAMETER_ENTITY:
2776 irentity = entity->parameter.v.entity;
2778 case DECLARATION_KIND_FUNCTION:
2779 case DECLARATION_KIND_INNER_FUNCTION:
2780 irentity = entity->function.entity;
2782 case DECLARATION_KIND_PARAMETER:
2783 case DECLARATION_KIND_LOCAL_VARIABLE:
2784 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
2791 if (irentity != NULL) {
2792 irtype = get_entity_type(irentity);
2794 type_t *type = expression->type;
2795 irtype = get_ir_type(type);
2798 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2799 symconst_symbol sym;
2800 sym.type_p = irtype;
2801 return new_SymConst(mode, sym, symconst_type_align);
2804 static void init_ir_types(void);
2806 long fold_constant(const expression_t *expression)
2808 assert(is_type_valid(skip_typeref(expression->base.type)));
2810 bool constant_folding_old = constant_folding;
2811 constant_folding = true;
2815 assert(is_constant_expression(expression));
2817 ir_graph *old_current_ir_graph = current_ir_graph;
2818 current_ir_graph = get_const_code_irg();
2820 ir_node *cnst = expression_to_firm(expression);
2821 current_ir_graph = old_current_ir_graph;
2823 if (!is_Const(cnst)) {
2824 panic("couldn't fold constant");
2827 tarval *tv = get_Const_tarval(cnst);
2828 if (!tarval_is_long(tv)) {
2829 panic("result of constant folding is not integer");
2832 constant_folding = constant_folding_old;
2834 return get_tarval_long(tv);
2837 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2839 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2841 /* first try to fold a constant condition */
2842 if (is_constant_expression(expression->condition)) {
2843 long val = fold_constant(expression->condition);
2845 expression_t *true_expression = expression->true_expression;
2846 if (true_expression == NULL)
2847 true_expression = expression->condition;
2848 return expression_to_firm(true_expression);
2850 return expression_to_firm(expression->false_expression);
2854 ir_node *cur_block = get_cur_block();
2856 /* create the true block */
2857 ir_node *true_block = new_immBlock();
2858 set_cur_block(true_block);
2860 ir_node *true_val = expression->true_expression != NULL ?
2861 expression_to_firm(expression->true_expression) : NULL;
2862 ir_node *true_jmp = new_Jmp();
2864 /* create the false block */
2865 ir_node *false_block = new_immBlock();
2866 set_cur_block(false_block);
2868 ir_node *false_val = expression_to_firm(expression->false_expression);
2869 ir_node *false_jmp = new_Jmp();
2871 /* create the condition evaluation */
2872 set_cur_block(cur_block);
2873 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2874 if (expression->true_expression == NULL) {
2875 if (cond_expr != NULL) {
2876 true_val = cond_expr;
2878 /* Condition ended with a short circuit (&&, ||, !) operation.
2879 * Generate a "1" as value for the true branch. */
2880 true_val = new_Const(get_mode_one(mode_Is));
2883 mature_immBlock(true_block);
2884 mature_immBlock(false_block);
2886 /* create the common block */
2887 ir_node *in_cf[2] = { true_jmp, false_jmp };
2888 new_Block(2, in_cf);
2890 /* TODO improve static semantics, so either both or no values are NULL */
2891 if (true_val == NULL || false_val == NULL)
2894 ir_node *in[2] = { true_val, false_val };
2895 ir_mode *mode = get_irn_mode(true_val);
2896 assert(get_irn_mode(false_val) == mode);
2897 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2903 * Returns an IR-node representing the address of a field.
2905 static ir_node *select_addr(const select_expression_t *expression)
2907 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2909 construct_select_compound(expression);
2911 ir_node *compound_addr = expression_to_firm(expression->compound);
2913 entity_t *entry = expression->compound_entry;
2914 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2915 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2917 if (constant_folding) {
2918 ir_mode *mode = get_irn_mode(compound_addr);
2919 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2920 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2921 return new_d_Add(dbgi, compound_addr, ofs, mode);
2923 ir_entity *irentity = entry->compound_member.entity;
2924 assert(irentity != NULL);
2925 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2929 static ir_node *select_to_firm(const select_expression_t *expression)
2931 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2932 ir_node *addr = select_addr(expression);
2933 type_t *type = revert_automatic_type_conversion(
2934 (const expression_t*) expression);
2935 type = skip_typeref(type);
2937 entity_t *entry = expression->compound_entry;
2938 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2939 type_t *entry_type = skip_typeref(entry->declaration.type);
2941 if (entry_type->kind == TYPE_BITFIELD) {
2942 return bitfield_extract_to_firm(expression, addr);
2945 return deref_address(dbgi, type, addr);
2948 /* Values returned by __builtin_classify_type. */
2949 typedef enum gcc_type_class
2955 enumeral_type_class,
2958 reference_type_class,
2962 function_type_class,
2973 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2975 type_t *type = expr->type_expression->base.type;
2977 /* FIXME gcc returns different values depending on whether compiling C or C++
2978 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2981 type = skip_typeref(type);
2982 switch (type->kind) {
2984 const atomic_type_t *const atomic_type = &type->atomic;
2985 switch (atomic_type->akind) {
2986 /* should not be reached */
2987 case ATOMIC_TYPE_INVALID:
2991 /* gcc cannot do that */
2992 case ATOMIC_TYPE_VOID:
2993 tc = void_type_class;
2996 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2997 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2998 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2999 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
3000 case ATOMIC_TYPE_SHORT:
3001 case ATOMIC_TYPE_USHORT:
3002 case ATOMIC_TYPE_INT:
3003 case ATOMIC_TYPE_UINT:
3004 case ATOMIC_TYPE_LONG:
3005 case ATOMIC_TYPE_ULONG:
3006 case ATOMIC_TYPE_LONGLONG:
3007 case ATOMIC_TYPE_ULONGLONG:
3008 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
3009 tc = integer_type_class;
3012 case ATOMIC_TYPE_FLOAT:
3013 case ATOMIC_TYPE_DOUBLE:
3014 case ATOMIC_TYPE_LONG_DOUBLE:
3015 tc = real_type_class;
3018 panic("Unexpected atomic type in classify_type_to_firm().");
3021 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3022 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3023 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
3024 case TYPE_ARRAY: /* gcc handles this as pointer */
3025 case TYPE_FUNCTION: /* gcc handles this as pointer */
3026 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3027 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3028 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3030 /* gcc handles this as integer */
3031 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3033 /* gcc classifies the referenced type */
3034 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3037 /* typedef/typeof should be skipped already */
3044 panic("unexpected TYPE classify_type_to_firm().");
3048 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3049 tarval *const tv = new_tarval_from_long(tc, mode_int);
3050 return new_d_Const(dbgi, tv);
3053 static ir_node *function_name_to_firm(
3054 const funcname_expression_t *const expr)
3056 switch(expr->kind) {
3057 case FUNCNAME_FUNCTION:
3058 case FUNCNAME_PRETTY_FUNCTION:
3059 case FUNCNAME_FUNCDNAME:
3060 if (current_function_name == NULL) {
3061 const source_position_t *const src_pos = &expr->base.source_position;
3062 const char *name = current_function_entity->base.symbol->string;
3063 const string_t string = { name, strlen(name) + 1 };
3064 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3066 return current_function_name;
3067 case FUNCNAME_FUNCSIG:
3068 if (current_funcsig == NULL) {
3069 const source_position_t *const src_pos = &expr->base.source_position;
3070 ir_entity *ent = get_irg_entity(current_ir_graph);
3071 const char *const name = get_entity_ld_name(ent);
3072 const string_t string = { name, strlen(name) + 1 };
3073 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3075 return current_funcsig;
3077 panic("Unsupported function name");
3080 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3082 statement_t *statement = expr->statement;
3084 assert(statement->kind == STATEMENT_COMPOUND);
3085 return compound_statement_to_firm(&statement->compound);
3088 static ir_node *va_start_expression_to_firm(
3089 const va_start_expression_t *const expr)
3091 type_t *const type = current_function_entity->declaration.type;
3092 ir_type *const method_type = get_ir_type(type);
3093 int const n = get_method_n_params(method_type) - 1;
3094 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
3095 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
3096 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3097 ir_node *const no_mem = new_NoMem();
3098 ir_node *const arg_sel =
3099 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3101 ir_node *const cnst = get_type_size(expr->parameter->base.type);
3102 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3103 set_value_for_expression(expr->ap, add);
3108 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3110 type_t *const type = expr->base.type;
3111 expression_t *const ap_expr = expr->ap;
3112 ir_node *const ap_addr = expression_to_addr(ap_expr);
3113 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3114 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3115 ir_node *const res = deref_address(dbgi, type, ap);
3117 ir_node *const cnst = get_type_size(expr->base.type);
3118 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
3120 set_value_for_expression_addr(ap_expr, add, ap_addr);
3125 static ir_node *dereference_addr(const unary_expression_t *const expression)
3127 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3128 return expression_to_firm(expression->value);
3132 * Returns a IR-node representing an lvalue of the given expression.
3134 static ir_node *expression_to_addr(const expression_t *expression)
3136 switch(expression->kind) {
3137 case EXPR_ARRAY_ACCESS:
3138 return array_access_addr(&expression->array_access);
3140 return call_expression_to_firm(&expression->call);
3141 case EXPR_COMPOUND_LITERAL:
3142 return compound_literal_to_firm(&expression->compound_literal);
3143 case EXPR_REFERENCE:
3144 return reference_addr(&expression->reference);
3146 return select_addr(&expression->select);
3147 case EXPR_UNARY_DEREFERENCE:
3148 return dereference_addr(&expression->unary);
3152 panic("trying to get address of non-lvalue");
3155 static ir_node *builtin_constant_to_firm(
3156 const builtin_constant_expression_t *expression)
3158 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3161 if (is_constant_expression(expression->value)) {
3166 return new_Const_long(mode, v);
3169 static ir_node *builtin_prefetch_to_firm(
3170 const builtin_prefetch_expression_t *expression)
3172 ir_node *adr = expression_to_firm(expression->adr);
3173 /* no Firm support for prefetch yet */
3178 static ir_node *get_label_block(label_t *label)
3180 if (label->block != NULL)
3181 return label->block;
3183 /* beware: might be called from create initializer with current_ir_graph
3184 * set to const_code_irg. */
3185 ir_graph *rem = current_ir_graph;
3186 current_ir_graph = current_function;
3188 ir_node *block = new_immBlock();
3190 label->block = block;
3192 ARR_APP1(label_t *, all_labels, label);
3194 current_ir_graph = rem;
3199 * Pointer to a label. This is used for the
3200 * GNU address-of-label extension.
3202 static ir_node *label_address_to_firm(
3203 const label_address_expression_t *label)
3205 ir_node *block = get_label_block(label->label);
3206 ir_label_t nr = get_Block_label(block);
3209 nr = get_irp_next_label_nr();
3210 set_Block_label(block, nr);
3212 symconst_symbol value;
3214 return new_SymConst(mode_P_code, value, symconst_label);
3217 static ir_node *builtin_symbol_to_firm(
3218 const builtin_symbol_expression_t *expression)
3220 /* for gcc compatibility we have to produce (dummy) addresses for some
3222 if (warning.other) {
3223 warningf(&expression->base.source_position,
3224 "taking address of builtin '%Y'", expression->symbol);
3227 /* simply create a NULL pointer */
3228 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
3229 ir_node *res = new_Const_long(mode, 0);
3235 * creates firm nodes for an expression. The difference between this function
3236 * and expression_to_firm is, that this version might produce mode_b nodes
3237 * instead of mode_Is.
3239 static ir_node *_expression_to_firm(const expression_t *expression)
3242 if (!constant_folding) {
3243 assert(!expression->base.transformed);
3244 ((expression_t*) expression)->base.transformed = true;
3248 switch (expression->kind) {
3249 case EXPR_CHARACTER_CONSTANT:
3250 return character_constant_to_firm(&expression->conste);
3251 case EXPR_WIDE_CHARACTER_CONSTANT:
3252 return wide_character_constant_to_firm(&expression->conste);
3254 return const_to_firm(&expression->conste);
3255 case EXPR_STRING_LITERAL:
3256 return string_literal_to_firm(&expression->string);
3257 case EXPR_WIDE_STRING_LITERAL:
3258 return wide_string_literal_to_firm(&expression->wide_string);
3259 case EXPR_REFERENCE:
3260 return reference_expression_to_firm(&expression->reference);
3261 case EXPR_REFERENCE_ENUM_VALUE:
3262 return reference_expression_enum_value_to_firm(&expression->reference);
3264 return call_expression_to_firm(&expression->call);
3266 return unary_expression_to_firm(&expression->unary);
3268 return binary_expression_to_firm(&expression->binary);
3269 case EXPR_ARRAY_ACCESS:
3270 return array_access_to_firm(&expression->array_access);
3272 return sizeof_to_firm(&expression->typeprop);
3274 return alignof_to_firm(&expression->typeprop);
3275 case EXPR_CONDITIONAL:
3276 return conditional_to_firm(&expression->conditional);
3278 return select_to_firm(&expression->select);
3279 case EXPR_CLASSIFY_TYPE:
3280 return classify_type_to_firm(&expression->classify_type);
3282 return function_name_to_firm(&expression->funcname);
3283 case EXPR_STATEMENT:
3284 return statement_expression_to_firm(&expression->statement);
3286 return va_start_expression_to_firm(&expression->va_starte);
3288 return va_arg_expression_to_firm(&expression->va_arge);
3289 case EXPR_BUILTIN_SYMBOL:
3290 return builtin_symbol_to_firm(&expression->builtin_symbol);
3291 case EXPR_BUILTIN_CONSTANT_P:
3292 return builtin_constant_to_firm(&expression->builtin_constant);
3293 case EXPR_BUILTIN_PREFETCH:
3294 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3296 return offsetof_to_firm(&expression->offsetofe);
3297 case EXPR_COMPOUND_LITERAL:
3298 return compound_literal_to_firm(&expression->compound_literal);
3299 case EXPR_LABEL_ADDRESS:
3300 return label_address_to_firm(&expression->label_address);
3306 panic("invalid expression found");
3309 static bool is_builtin_expect(const expression_t *expression)
3311 if (expression->kind != EXPR_CALL)
3314 expression_t *function = expression->call.function;
3315 if (function->kind != EXPR_BUILTIN_SYMBOL)
3317 if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3323 static bool produces_mode_b(const expression_t *expression)
3325 switch (expression->kind) {
3326 case EXPR_BINARY_EQUAL:
3327 case EXPR_BINARY_NOTEQUAL:
3328 case EXPR_BINARY_LESS:
3329 case EXPR_BINARY_LESSEQUAL:
3330 case EXPR_BINARY_GREATER:
3331 case EXPR_BINARY_GREATEREQUAL:
3332 case EXPR_BINARY_ISGREATER:
3333 case EXPR_BINARY_ISGREATEREQUAL:
3334 case EXPR_BINARY_ISLESS:
3335 case EXPR_BINARY_ISLESSEQUAL:
3336 case EXPR_BINARY_ISLESSGREATER:
3337 case EXPR_BINARY_ISUNORDERED:
3338 case EXPR_UNARY_NOT:
3342 if (is_builtin_expect(expression)) {
3343 expression_t *argument = expression->call.arguments->expression;
3344 return produces_mode_b(argument);
3347 case EXPR_BINARY_COMMA:
3348 return produces_mode_b(expression->binary.right);
3355 static ir_node *expression_to_firm(const expression_t *expression)
3357 if (!produces_mode_b(expression)) {
3358 ir_node *res = _expression_to_firm(expression);
3359 assert(res == NULL || get_irn_mode(res) != mode_b);
3363 if (is_constant_expression(expression)) {
3364 ir_node *res = _expression_to_firm(expression);
3365 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3366 assert(is_Const(res));
3367 if (is_Const_null(res)) {
3368 return new_Const_long(mode, 0);
3370 return new_Const_long(mode, 1);
3374 /* we have to produce a 0/1 from the mode_b expression */
3375 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3376 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3377 return produce_condition_result(expression, mode, dbgi);
3381 * create a short-circuit expression evaluation that tries to construct
3382 * efficient control flow structures for &&, || and ! expressions
3384 static ir_node *create_condition_evaluation(const expression_t *expression,
3385 ir_node *true_block,
3386 ir_node *false_block)
3388 switch(expression->kind) {
3389 case EXPR_UNARY_NOT: {
3390 const unary_expression_t *unary_expression = &expression->unary;
3391 create_condition_evaluation(unary_expression->value, false_block,
3395 case EXPR_BINARY_LOGICAL_AND: {
3396 const binary_expression_t *binary_expression = &expression->binary;
3398 ir_node *extra_block = new_immBlock();
3399 create_condition_evaluation(binary_expression->left, extra_block,
3401 mature_immBlock(extra_block);
3402 set_cur_block(extra_block);
3403 create_condition_evaluation(binary_expression->right, true_block,
3407 case EXPR_BINARY_LOGICAL_OR: {
3408 const binary_expression_t *binary_expression = &expression->binary;
3410 ir_node *extra_block = new_immBlock();
3411 create_condition_evaluation(binary_expression->left, true_block,
3413 mature_immBlock(extra_block);
3414 set_cur_block(extra_block);
3415 create_condition_evaluation(binary_expression->right, true_block,
3423 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3424 ir_node *cond_expr = _expression_to_firm(expression);
3425 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3426 ir_node *cond = new_d_Cond(dbgi, condition);
3427 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3428 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3430 /* set branch prediction info based on __builtin_expect */
3431 if (is_builtin_expect(expression) && is_Cond(cond)) {
3432 call_argument_t *argument = expression->call.arguments->next;
3433 if (is_constant_expression(argument->expression)) {
3434 long cnst = fold_constant(argument->expression);
3435 cond_jmp_predicate pred;
3438 pred = COND_JMP_PRED_FALSE;
3440 pred = COND_JMP_PRED_TRUE;
3442 set_Cond_jmp_pred(cond, pred);
3446 add_immBlock_pred(true_block, true_proj);
3447 add_immBlock_pred(false_block, false_proj);
3449 set_cur_block(NULL);
3454 static void create_variable_entity(entity_t *variable,
3455 declaration_kind_t declaration_kind,
3456 ir_type *parent_type)
3458 assert(variable->kind == ENTITY_VARIABLE);
3459 type_t *type = skip_typeref(variable->declaration.type);
3460 type = get_aligned_type(type, variable->variable.alignment);
3462 ident *const id = new_id_from_str(variable->base.symbol->string);
3463 ir_type *const irtype = get_ir_type(type);
3464 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3466 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3468 handle_gnu_attributes_ent(irentity, variable);
3470 variable->declaration.kind = (unsigned char) declaration_kind;
3471 variable->variable.v.entity = irentity;
3472 set_entity_variability(irentity, variability_uninitialized);
3473 set_entity_ld_ident(irentity, create_ld_ident(variable));
3475 if (parent_type == get_tls_type())
3476 set_entity_allocation(irentity, allocation_automatic);
3477 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3478 set_entity_allocation(irentity, allocation_static);
3480 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3481 set_entity_volatility(irentity, volatility_is_volatile);
3486 typedef struct type_path_entry_t type_path_entry_t;
3487 struct type_path_entry_t {
3489 ir_initializer_t *initializer;
3491 entity_t *compound_entry;
3494 typedef struct type_path_t type_path_t;
3495 struct type_path_t {
3496 type_path_entry_t *path;
3501 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3503 size_t len = ARR_LEN(path->path);
3505 for (size_t i = 0; i < len; ++i) {
3506 const type_path_entry_t *entry = & path->path[i];
3508 type_t *type = skip_typeref(entry->type);
3509 if (is_type_compound(type)) {
3510 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3511 } else if (is_type_array(type)) {
3512 fprintf(stderr, "[%u]", (unsigned) entry->index);
3514 fprintf(stderr, "-INVALID-");
3517 fprintf(stderr, " (");
3518 print_type(path->top_type);
3519 fprintf(stderr, ")");
3522 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3524 size_t len = ARR_LEN(path->path);
3526 return & path->path[len-1];
3529 static type_path_entry_t *append_to_type_path(type_path_t *path)
3531 size_t len = ARR_LEN(path->path);
3532 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3534 type_path_entry_t *result = & path->path[len];
3535 memset(result, 0, sizeof(result[0]));
3539 static size_t get_compound_member_count(const compound_type_t *type)
3541 compound_t *compound = type->compound;
3542 size_t n_members = 0;
3543 entity_t *member = compound->members.entities;
3544 for ( ; member != NULL; member = member->base.next) {
3551 static ir_initializer_t *get_initializer_entry(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 if (ARR_LEN(path->path) == 0) {
3561 type_path_entry_t *top = get_type_path_top(path);
3562 ir_initializer_t *initializer = top->initializer;
3563 return get_initializer_compound_value(initializer, top->index);
3567 static void descend_into_subtype(type_path_t *path)
3569 type_t *orig_top_type = path->top_type;
3570 type_t *top_type = skip_typeref(orig_top_type);
3572 assert(is_type_compound(top_type) || is_type_array(top_type));
3574 ir_initializer_t *initializer = get_initializer_entry(path);
3576 type_path_entry_t *top = append_to_type_path(path);
3577 top->type = top_type;
3581 if (is_type_compound(top_type)) {
3582 compound_t *compound = top_type->compound.compound;
3583 entity_t *entry = compound->members.entities;
3585 top->compound_entry = entry;
3587 len = get_compound_member_count(&top_type->compound);
3588 if (entry != NULL) {
3589 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3590 path->top_type = entry->declaration.type;
3593 assert(is_type_array(top_type));
3594 assert(top_type->array.size > 0);
3597 path->top_type = top_type->array.element_type;
3598 len = top_type->array.size;
3600 if (initializer == NULL
3601 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3602 initializer = create_initializer_compound(len);
3603 /* we have to set the entry at the 2nd latest path entry... */
3604 size_t path_len = ARR_LEN(path->path);
3605 assert(path_len >= 1);
3607 type_path_entry_t *entry = & path->path[path_len-2];
3608 ir_initializer_t *tinitializer = entry->initializer;
3609 set_initializer_compound_value(tinitializer, entry->index,
3613 top->initializer = initializer;
3616 static void ascend_from_subtype(type_path_t *path)
3618 type_path_entry_t *top = get_type_path_top(path);
3620 path->top_type = top->type;
3622 size_t len = ARR_LEN(path->path);
3623 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3626 static void walk_designator(type_path_t *path, const designator_t *designator)
3628 /* designators start at current object type */
3629 ARR_RESIZE(type_path_entry_t, path->path, 1);
3631 for ( ; designator != NULL; designator = designator->next) {
3632 type_path_entry_t *top = get_type_path_top(path);
3633 type_t *orig_type = top->type;
3634 type_t *type = skip_typeref(orig_type);
3636 if (designator->symbol != NULL) {
3637 assert(is_type_compound(type));
3639 symbol_t *symbol = designator->symbol;
3641 compound_t *compound = type->compound.compound;
3642 entity_t *iter = compound->members.entities;
3643 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3644 if (iter->base.symbol == symbol) {
3645 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3649 assert(iter != NULL);
3651 top->type = orig_type;
3652 top->compound_entry = iter;
3654 orig_type = iter->declaration.type;
3656 expression_t *array_index = designator->array_index;
3657 assert(designator->array_index != NULL);
3658 assert(is_type_array(type));
3660 long index = fold_constant(array_index);
3663 if (type->array.size_constant) {
3664 long array_size = type->array.size;
3665 assert(index < array_size);
3669 top->type = orig_type;
3670 top->index = (size_t) index;
3671 orig_type = type->array.element_type;
3673 path->top_type = orig_type;
3675 if (designator->next != NULL) {
3676 descend_into_subtype(path);
3680 path->invalid = false;
3683 static void advance_current_object(type_path_t *path)
3685 if (path->invalid) {
3686 /* TODO: handle this... */
3687 panic("invalid initializer in ast2firm (excessive elements)");
3690 type_path_entry_t *top = get_type_path_top(path);
3692 type_t *type = skip_typeref(top->type);
3693 if (is_type_union(type)) {
3694 top->compound_entry = NULL;
3695 } else if (is_type_struct(type)) {
3696 entity_t *entry = top->compound_entry;
3699 entry = entry->base.next;
3700 top->compound_entry = entry;
3701 if (entry != NULL) {
3702 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3703 path->top_type = entry->declaration.type;
3707 assert(is_type_array(type));
3710 if (!type->array.size_constant || top->index < type->array.size) {
3715 /* we're past the last member of the current sub-aggregate, try if we
3716 * can ascend in the type hierarchy and continue with another subobject */
3717 size_t len = ARR_LEN(path->path);
3720 ascend_from_subtype(path);
3721 advance_current_object(path);
3723 path->invalid = true;
3728 static ir_initializer_t *create_ir_initializer(
3729 const initializer_t *initializer, type_t *type);
3731 static ir_initializer_t *create_ir_initializer_value(
3732 const initializer_value_t *initializer)
3734 if (is_type_compound(initializer->value->base.type)) {
3735 panic("initializer creation for compounds not implemented yet");
3737 ir_node *value = expression_to_firm(initializer->value);
3738 type_t *type = initializer->value->base.type;
3739 ir_mode *mode = get_ir_mode_storage(type);
3740 value = create_conv(NULL, value, mode);
3741 return create_initializer_const(value);
3744 /** test wether type can be initialized by a string constant */
3745 static bool is_string_type(type_t *type)
3748 if (is_type_pointer(type)) {
3749 inner = skip_typeref(type->pointer.points_to);
3750 } else if(is_type_array(type)) {
3751 inner = skip_typeref(type->array.element_type);
3756 return is_type_integer(inner);
3759 static ir_initializer_t *create_ir_initializer_list(
3760 const initializer_list_t *initializer, type_t *type)
3763 memset(&path, 0, sizeof(path));
3764 path.top_type = type;
3765 path.path = NEW_ARR_F(type_path_entry_t, 0);
3767 descend_into_subtype(&path);
3769 for (size_t i = 0; i < initializer->len; ++i) {
3770 const initializer_t *sub_initializer = initializer->initializers[i];
3772 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3773 walk_designator(&path, sub_initializer->designator.designator);
3777 if (sub_initializer->kind == INITIALIZER_VALUE) {
3778 /* we might have to descend into types until we're at a scalar
3781 type_t *orig_top_type = path.top_type;
3782 type_t *top_type = skip_typeref(orig_top_type);
3784 if (is_type_scalar(top_type))
3786 descend_into_subtype(&path);
3788 } else if (sub_initializer->kind == INITIALIZER_STRING
3789 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3790 /* we might have to descend into types until we're at a scalar
3793 type_t *orig_top_type = path.top_type;
3794 type_t *top_type = skip_typeref(orig_top_type);
3796 if (is_string_type(top_type))
3798 descend_into_subtype(&path);
3802 ir_initializer_t *sub_irinitializer
3803 = create_ir_initializer(sub_initializer, path.top_type);
3805 size_t path_len = ARR_LEN(path.path);
3806 assert(path_len >= 1);
3807 type_path_entry_t *entry = & path.path[path_len-1];
3808 ir_initializer_t *tinitializer = entry->initializer;
3809 set_initializer_compound_value(tinitializer, entry->index,
3812 advance_current_object(&path);
3815 assert(ARR_LEN(path.path) >= 1);
3816 ir_initializer_t *result = path.path[0].initializer;
3817 DEL_ARR_F(path.path);
3822 static ir_initializer_t *create_ir_initializer_string(
3823 const initializer_string_t *initializer, type_t *type)
3825 type = skip_typeref(type);
3827 size_t string_len = initializer->string.size;
3828 assert(type->kind == TYPE_ARRAY);
3829 assert(type->array.size_constant);
3830 size_t len = type->array.size;
3831 ir_initializer_t *irinitializer = create_initializer_compound(len);
3833 const char *string = initializer->string.begin;
3834 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3836 for (size_t i = 0; i < len; ++i) {
3841 tarval *tv = new_tarval_from_long(c, mode);
3842 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3844 set_initializer_compound_value(irinitializer, i, char_initializer);
3847 return irinitializer;
3850 static ir_initializer_t *create_ir_initializer_wide_string(
3851 const initializer_wide_string_t *initializer, type_t *type)
3853 size_t string_len = initializer->string.size;
3854 assert(type->kind == TYPE_ARRAY);
3855 assert(type->array.size_constant);
3856 size_t len = type->array.size;
3857 ir_initializer_t *irinitializer = create_initializer_compound(len);
3859 const wchar_rep_t *string = initializer->string.begin;
3860 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3862 for (size_t i = 0; i < len; ++i) {
3864 if (i < string_len) {
3867 tarval *tv = new_tarval_from_long(c, mode);
3868 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3870 set_initializer_compound_value(irinitializer, i, char_initializer);
3873 return irinitializer;
3876 static ir_initializer_t *create_ir_initializer(
3877 const initializer_t *initializer, type_t *type)
3879 switch(initializer->kind) {
3880 case INITIALIZER_STRING:
3881 return create_ir_initializer_string(&initializer->string, type);
3883 case INITIALIZER_WIDE_STRING:
3884 return create_ir_initializer_wide_string(&initializer->wide_string,
3887 case INITIALIZER_LIST:
3888 return create_ir_initializer_list(&initializer->list, type);
3890 case INITIALIZER_VALUE:
3891 return create_ir_initializer_value(&initializer->value);
3893 case INITIALIZER_DESIGNATOR:
3894 panic("unexpected designator initializer found");
3896 panic("unknown initializer");
3899 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3902 if (is_atomic_type(type)) {
3903 ir_mode *mode = get_type_mode(type);
3904 tarval *zero = get_mode_null(mode);
3905 ir_node *cnst = new_d_Const(dbgi, zero);
3907 /* TODO: bitfields */
3908 ir_node *mem = get_store();
3909 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3910 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3913 assert(is_compound_type(type));
3916 if (is_Array_type(type)) {
3917 assert(has_array_upper_bound(type, 0));
3918 n_members = get_array_upper_bound_int(type, 0);
3920 n_members = get_compound_n_members(type);
3923 for (int i = 0; i < n_members; ++i) {
3926 if (is_Array_type(type)) {
3927 ir_entity *entity = get_array_element_entity(type);
3928 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3929 ir_node *cnst = new_d_Const(dbgi, index_tv);
3930 ir_node *in[1] = { cnst };
3931 irtype = get_array_element_type(type);
3932 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3934 ir_entity *member = get_compound_member(type, i);
3936 irtype = get_entity_type(member);
3937 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3940 create_dynamic_null_initializer(irtype, dbgi, addr);
3945 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3946 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3948 switch(get_initializer_kind(initializer)) {
3949 case IR_INITIALIZER_NULL: {
3950 create_dynamic_null_initializer(type, dbgi, base_addr);
3953 case IR_INITIALIZER_CONST: {
3954 ir_node *node = get_initializer_const_value(initializer);
3955 ir_mode *mode = get_irn_mode(node);
3956 ir_type *ent_type = get_entity_type(entity);
3958 /* is it a bitfield type? */
3959 if (is_Primitive_type(ent_type) &&
3960 get_primitive_base_type(ent_type) != NULL) {
3961 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3965 assert(get_type_mode(type) == mode);
3966 ir_node *mem = get_store();
3967 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, cons_none);
3968 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3972 case IR_INITIALIZER_TARVAL: {
3973 tarval *tv = get_initializer_tarval_value(initializer);
3974 ir_mode *mode = get_tarval_mode(tv);
3975 ir_node *cnst = new_d_Const(dbgi, tv);
3976 ir_type *ent_type = get_entity_type(entity);
3978 /* is it a bitfield type? */
3979 if (is_Primitive_type(ent_type) &&
3980 get_primitive_base_type(ent_type) != NULL) {
3981 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3985 assert(get_type_mode(type) == mode);
3986 ir_node *mem = get_store();
3987 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, cons_none);
3988 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3992 case IR_INITIALIZER_COMPOUND: {
3993 assert(is_compound_type(type));
3995 if (is_Array_type(type)) {
3996 assert(has_array_upper_bound(type, 0));
3997 n_members = get_array_upper_bound_int(type, 0);
3999 n_members = get_compound_n_members(type);
4002 if (get_initializer_compound_n_entries(initializer)
4003 != (unsigned) n_members)
4004 panic("initializer doesn't match compound type");
4006 for (int i = 0; i < n_members; ++i) {
4009 ir_entity *sub_entity;
4010 if (is_Array_type(type)) {
4011 tarval *index_tv = new_tarval_from_long(i, mode_uint);
4012 ir_node *cnst = new_d_Const(dbgi, index_tv);
4013 ir_node *in[1] = { cnst };
4014 irtype = get_array_element_type(type);
4015 sub_entity = get_array_element_entity(type);
4016 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4019 sub_entity = get_compound_member(type, i);
4020 irtype = get_entity_type(sub_entity);
4021 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4025 ir_initializer_t *sub_init
4026 = get_initializer_compound_value(initializer, i);
4028 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4035 panic("invalid IR_INITIALIZER found");
4038 static void create_dynamic_initializer(ir_initializer_t *initializer,
4039 dbg_info *dbgi, ir_entity *entity)
4041 ir_node *frame = get_local_frame(entity);
4042 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4043 ir_type *type = get_entity_type(entity);
4045 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4048 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4049 ir_entity *entity, type_t *type)
4051 ir_node *memory = get_store();
4052 ir_node *nomem = new_NoMem();
4053 ir_node *frame = get_irg_frame(current_ir_graph);
4054 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4056 if (initializer->kind == INITIALIZER_VALUE) {
4057 initializer_value_t *initializer_value = &initializer->value;
4059 ir_node *value = expression_to_firm(initializer_value->value);
4060 type = skip_typeref(type);
4061 assign_value(dbgi, addr, type, value);
4065 if (!is_constant_initializer(initializer)) {
4066 ir_initializer_t *irinitializer
4067 = create_ir_initializer(initializer, type);
4069 create_dynamic_initializer(irinitializer, dbgi, entity);
4073 /* create the ir_initializer */
4074 ir_graph *const old_current_ir_graph = current_ir_graph;
4075 current_ir_graph = get_const_code_irg();
4077 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4079 assert(current_ir_graph == get_const_code_irg());
4080 current_ir_graph = old_current_ir_graph;
4082 /* create a "template" entity which is copied to the entity on the stack */
4083 ident *const id = id_unique("initializer.%u");
4084 ir_type *const irtype = get_ir_type(type);
4085 ir_type *const global_type = get_glob_type();
4086 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4087 set_entity_ld_ident(init_entity, id);
4089 set_entity_variability(init_entity, variability_initialized);
4090 set_entity_visibility(init_entity, visibility_local);
4091 set_entity_allocation(init_entity, allocation_static);
4093 set_entity_initializer(init_entity, irinitializer);
4095 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4096 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4098 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4099 set_store(copyb_mem);
4102 static void create_initializer_local_variable_entity(entity_t *entity)
4104 assert(entity->kind == ENTITY_VARIABLE);
4105 initializer_t *initializer = entity->variable.initializer;
4106 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4107 ir_entity *irentity = entity->variable.v.entity;
4108 type_t *type = entity->declaration.type;
4110 type = get_aligned_type(type, entity->variable.alignment);
4111 create_local_initializer(initializer, dbgi, irentity, type);
4114 static void create_variable_initializer(entity_t *entity)
4116 assert(entity->kind == ENTITY_VARIABLE);
4117 initializer_t *initializer = entity->variable.initializer;
4118 if (initializer == NULL)
4121 declaration_kind_t declaration_kind
4122 = (declaration_kind_t) entity->declaration.kind;
4123 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4124 create_initializer_local_variable_entity(entity);
4128 type_t *type = entity->declaration.type;
4129 type_qualifiers_t tq = get_type_qualifier(type, true);
4131 if (initializer->kind == INITIALIZER_VALUE) {
4132 initializer_value_t *initializer_value = &initializer->value;
4133 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4135 ir_node *value = expression_to_firm(initializer_value->value);
4137 type_t *type = initializer_value->value->base.type;
4138 ir_mode *mode = get_ir_mode_storage(type);
4139 value = create_conv(dbgi, value, mode);
4140 value = do_strict_conv(dbgi, value);
4142 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4143 set_value(entity->variable.v.value_number, value);
4145 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4147 ir_entity *irentity = entity->variable.v.entity;
4149 if (tq & TYPE_QUALIFIER_CONST) {
4150 set_entity_variability(irentity, variability_constant);
4152 set_entity_variability(irentity, variability_initialized);
4154 set_atomic_ent_value(irentity, value);
4157 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4158 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4160 ir_entity *irentity = entity->variable.v.entity;
4161 ir_initializer_t *irinitializer
4162 = create_ir_initializer(initializer, type);
4164 if (tq & TYPE_QUALIFIER_CONST) {
4165 set_entity_variability(irentity, variability_constant);
4167 set_entity_variability(irentity, variability_initialized);
4169 set_entity_initializer(irentity, irinitializer);
4173 static void create_variable_length_array(entity_t *entity)
4175 assert(entity->kind == ENTITY_VARIABLE);
4176 assert(entity->variable.initializer == NULL);
4178 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4179 entity->variable.v.vla_base = NULL;
4181 /* TODO: record VLA somewhere so we create the free node when we leave
4185 static void allocate_variable_length_array(entity_t *entity)
4187 assert(entity->kind == ENTITY_VARIABLE);
4188 assert(entity->variable.initializer == NULL);
4189 assert(get_cur_block() != NULL);
4191 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4192 type_t *type = entity->declaration.type;
4193 ir_type *el_type = get_ir_type(type->array.element_type);
4195 /* make sure size_node is calculated */
4196 get_type_size(type);
4197 ir_node *elems = type->array.size_node;
4198 ir_node *mem = get_store();
4199 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4201 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4202 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4205 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4206 entity->variable.v.vla_base = addr;
4210 * Creates a Firm local variable from a declaration.
4212 static void create_local_variable(entity_t *entity)
4214 assert(entity->kind == ENTITY_VARIABLE);
4215 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4217 bool needs_entity = entity->variable.address_taken;
4218 type_t *type = skip_typeref(entity->declaration.type);
4220 /* is it a variable length array? */
4221 if (is_type_array(type) && !type->array.size_constant) {
4222 create_variable_length_array(entity);
4224 } else if (is_type_array(type) || is_type_compound(type)) {
4225 needs_entity = true;
4226 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4227 needs_entity = true;
4231 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4232 create_variable_entity(entity,
4233 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4236 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4237 entity->variable.v.value_number = next_value_number_function;
4238 set_irg_loc_description(current_ir_graph, next_value_number_function,
4240 ++next_value_number_function;
4244 static void create_local_static_variable(entity_t *entity)
4246 assert(entity->kind == ENTITY_VARIABLE);
4247 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4249 type_t *type = skip_typeref(entity->declaration.type);
4250 type = get_aligned_type(type, entity->variable.alignment);
4252 ir_type *const var_type = entity->variable.thread_local ?
4253 get_tls_type() : get_glob_type();
4254 ir_type *const irtype = get_ir_type(type);
4255 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4257 size_t l = strlen(entity->base.symbol->string);
4258 char buf[l + sizeof(".%u")];
4259 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4260 ident *const id = id_unique(buf);
4262 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4264 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4265 set_entity_volatility(irentity, volatility_is_volatile);
4268 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4269 entity->variable.v.entity = irentity;
4271 set_entity_ld_ident(irentity, id);
4272 set_entity_variability(irentity, variability_uninitialized);
4273 set_entity_visibility(irentity, visibility_local);
4274 set_entity_allocation(irentity, entity->variable.thread_local ?
4275 allocation_automatic : allocation_static);
4277 ir_graph *const old_current_ir_graph = current_ir_graph;
4278 current_ir_graph = get_const_code_irg();
4280 create_variable_initializer(entity);
4282 assert(current_ir_graph == get_const_code_irg());
4283 current_ir_graph = old_current_ir_graph;
4288 static void return_statement_to_firm(return_statement_t *statement)
4290 if (get_cur_block() == NULL)
4293 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4294 type_t *type = current_function_entity->declaration.type;
4295 ir_type *func_irtype = get_ir_type(type);
4300 if (get_method_n_ress(func_irtype) > 0) {
4301 ir_type *res_type = get_method_res_type(func_irtype, 0);
4303 if (statement->value != NULL) {
4304 ir_node *node = expression_to_firm(statement->value);
4305 if (!is_compound_type(res_type)) {
4306 type_t *type = statement->value->base.type;
4307 ir_mode *mode = get_ir_mode_storage(type);
4308 node = create_conv(dbgi, node, mode);
4309 node = do_strict_conv(dbgi, node);
4314 if (is_compound_type(res_type)) {
4317 mode = get_type_mode(res_type);
4319 in[0] = new_Unknown(mode);
4323 /* build return_value for its side effects */
4324 if (statement->value != NULL) {
4325 expression_to_firm(statement->value);
4330 ir_node *store = get_store();
4331 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4333 ir_node *end_block = get_irg_end_block(current_ir_graph);
4334 add_immBlock_pred(end_block, ret);
4336 set_cur_block(NULL);
4339 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4341 if (get_cur_block() == NULL)
4344 return expression_to_firm(statement->expression);
4347 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4349 entity_t *entity = compound->scope.entities;
4350 for ( ; entity != NULL; entity = entity->base.next) {
4351 if (!is_declaration(entity))
4354 create_local_declaration(entity);
4357 ir_node *result = NULL;
4358 statement_t *statement = compound->statements;
4359 for ( ; statement != NULL; statement = statement->base.next) {
4360 if (statement->base.next == NULL
4361 && statement->kind == STATEMENT_EXPRESSION) {
4362 result = expression_statement_to_firm(
4363 &statement->expression);
4366 statement_to_firm(statement);
4372 static void create_global_variable(entity_t *entity)
4374 assert(entity->kind == ENTITY_VARIABLE);
4377 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4378 case STORAGE_CLASS_STATIC: vis = visibility_local; break;
4379 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4380 case STORAGE_CLASS_NONE: vis = visibility_external_visible; break;
4382 default: panic("Invalid storage class for global variable");
4385 ir_type *var_type = entity->variable.thread_local ?
4386 get_tls_type() : get_glob_type();
4387 create_variable_entity(entity,
4388 DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4389 set_entity_visibility(entity->variable.v.entity, vis);
4392 static void create_local_declaration(entity_t *entity)
4394 assert(is_declaration(entity));
4396 /* construct type */
4397 (void) get_ir_type(entity->declaration.type);
4398 if (entity->base.symbol == NULL) {
4402 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4403 case STORAGE_CLASS_STATIC:
4404 create_local_static_variable(entity);
4406 case STORAGE_CLASS_EXTERN:
4407 if (entity->kind == ENTITY_FUNCTION) {
4408 assert(entity->function.statement == NULL);
4409 get_function_entity(entity);
4411 create_global_variable(entity);
4412 create_variable_initializer(entity);
4415 case STORAGE_CLASS_NONE:
4416 case STORAGE_CLASS_AUTO:
4417 case STORAGE_CLASS_REGISTER:
4418 if (entity->kind == ENTITY_FUNCTION) {
4419 if (entity->function.statement != NULL) {
4420 get_function_entity(entity);
4421 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4422 enqueue_inner_function(entity);
4424 get_function_entity(entity);
4427 create_local_variable(entity);
4430 case STORAGE_CLASS_TYPEDEF:
4433 panic("invalid storage class found");
4436 static void initialize_local_declaration(entity_t *entity)
4438 if (entity->base.symbol == NULL)
4441 switch ((declaration_kind_t) entity->declaration.kind) {
4442 case DECLARATION_KIND_LOCAL_VARIABLE:
4443 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4444 create_variable_initializer(entity);
4447 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4448 allocate_variable_length_array(entity);
4451 case DECLARATION_KIND_COMPOUND_MEMBER:
4452 case DECLARATION_KIND_GLOBAL_VARIABLE:
4453 case DECLARATION_KIND_FUNCTION:
4454 case DECLARATION_KIND_INNER_FUNCTION:
4457 case DECLARATION_KIND_PARAMETER:
4458 case DECLARATION_KIND_PARAMETER_ENTITY:
4459 panic("can't initialize parameters");
4461 case DECLARATION_KIND_UNKNOWN:
4462 panic("can't initialize unknown declaration");
4464 panic("invalid declaration kind");
4467 static void declaration_statement_to_firm(declaration_statement_t *statement)
4469 entity_t *entity = statement->declarations_begin;
4473 entity_t *const last = statement->declarations_end;
4474 for ( ;; entity = entity->base.next) {
4475 if (is_declaration(entity)) {
4476 initialize_local_declaration(entity);
4477 } else if (entity->kind == ENTITY_TYPEDEF) {
4478 type_t *const type = skip_typeref(entity->typedefe.type);
4479 if (is_type_array(type) && type->array.is_vla)
4480 get_vla_size(&type->array);
4487 static void if_statement_to_firm(if_statement_t *statement)
4489 ir_node *cur_block = get_cur_block();
4491 ir_node *fallthrough_block = NULL;
4493 /* the true (blocks) */
4494 ir_node *true_block = NULL;
4495 if (statement->true_statement != NULL) {
4496 true_block = new_immBlock();
4497 set_cur_block(true_block);
4498 statement_to_firm(statement->true_statement);
4499 if (get_cur_block() != NULL) {
4500 ir_node *jmp = new_Jmp();
4501 if (fallthrough_block == NULL)
4502 fallthrough_block = new_immBlock();
4503 add_immBlock_pred(fallthrough_block, jmp);
4507 /* the false (blocks) */
4508 ir_node *false_block = NULL;
4509 if (statement->false_statement != NULL) {
4510 false_block = new_immBlock();
4511 set_cur_block(false_block);
4513 statement_to_firm(statement->false_statement);
4514 if (get_cur_block() != NULL) {
4515 ir_node *jmp = new_Jmp();
4516 if (fallthrough_block == NULL)
4517 fallthrough_block = new_immBlock();
4518 add_immBlock_pred(fallthrough_block, jmp);
4522 /* create the condition */
4523 if (cur_block != NULL) {
4524 if (true_block == NULL || false_block == NULL) {
4525 if (fallthrough_block == NULL)
4526 fallthrough_block = new_immBlock();
4527 if (true_block == NULL)
4528 true_block = fallthrough_block;
4529 if (false_block == NULL)
4530 false_block = fallthrough_block;
4533 set_cur_block(cur_block);
4534 create_condition_evaluation(statement->condition, true_block,
4538 mature_immBlock(true_block);
4539 if (false_block != fallthrough_block && false_block != NULL) {
4540 mature_immBlock(false_block);
4542 if (fallthrough_block != NULL) {
4543 mature_immBlock(fallthrough_block);
4546 set_cur_block(fallthrough_block);
4549 static void while_statement_to_firm(while_statement_t *statement)
4551 ir_node *jmp = NULL;
4552 if (get_cur_block() != NULL) {
4556 /* create the header block */
4557 ir_node *header_block = new_immBlock();
4559 add_immBlock_pred(header_block, jmp);
4563 ir_node *old_continue_label = continue_label;
4564 ir_node *old_break_label = break_label;
4565 continue_label = header_block;
4568 ir_node *body_block = new_immBlock();
4569 set_cur_block(body_block);
4570 statement_to_firm(statement->body);
4571 ir_node *false_block = break_label;
4573 assert(continue_label == header_block);
4574 continue_label = old_continue_label;
4575 break_label = old_break_label;
4577 if (get_cur_block() != NULL) {
4579 add_immBlock_pred(header_block, jmp);
4582 /* shortcut for while(true) */
4583 if (is_constant_expression(statement->condition)
4584 && fold_constant(statement->condition) != 0) {
4585 set_cur_block(header_block);
4586 ir_node *header_jmp = new_Jmp();
4587 add_immBlock_pred(body_block, header_jmp);
4589 keep_alive(body_block);
4590 keep_all_memory(body_block);
4591 set_cur_block(body_block);
4593 if (false_block == NULL) {
4594 false_block = new_immBlock();
4597 /* create the condition */
4598 set_cur_block(header_block);
4600 create_condition_evaluation(statement->condition, body_block,
4604 mature_immBlock(body_block);
4605 mature_immBlock(header_block);
4606 if (false_block != NULL) {
4607 mature_immBlock(false_block);
4610 set_cur_block(false_block);
4613 static void do_while_statement_to_firm(do_while_statement_t *statement)
4615 ir_node *jmp = NULL;
4616 if (get_cur_block() != NULL) {
4620 /* create the header block */
4621 ir_node *header_block = new_immBlock();
4624 ir_node *body_block = new_immBlock();
4626 add_immBlock_pred(body_block, jmp);
4629 ir_node *old_continue_label = continue_label;
4630 ir_node *old_break_label = break_label;
4631 continue_label = header_block;
4634 set_cur_block(body_block);
4635 statement_to_firm(statement->body);
4636 ir_node *false_block = break_label;
4638 assert(continue_label == header_block);
4639 continue_label = old_continue_label;
4640 break_label = old_break_label;
4642 if (get_cur_block() != NULL) {
4643 ir_node *body_jmp = new_Jmp();
4644 add_immBlock_pred(header_block, body_jmp);
4645 mature_immBlock(header_block);
4648 if (false_block == NULL) {
4649 false_block = new_immBlock();
4652 /* create the condition */
4653 set_cur_block(header_block);
4655 create_condition_evaluation(statement->condition, body_block, false_block);
4656 mature_immBlock(body_block);
4657 mature_immBlock(header_block);
4658 mature_immBlock(false_block);
4660 set_cur_block(false_block);
4663 static void for_statement_to_firm(for_statement_t *statement)
4665 ir_node *jmp = NULL;
4667 /* create declarations */
4668 entity_t *entity = statement->scope.entities;
4669 for ( ; entity != NULL; entity = entity->base.next) {
4670 if (!is_declaration(entity))
4673 create_local_declaration(entity);
4676 if (get_cur_block() != NULL) {
4677 entity = statement->scope.entities;
4678 for ( ; entity != NULL; entity = entity->base.next) {
4679 if (!is_declaration(entity))
4682 initialize_local_declaration(entity);
4685 if (statement->initialisation != NULL) {
4686 expression_to_firm(statement->initialisation);
4693 /* create the step block */
4694 ir_node *const step_block = new_immBlock();
4695 set_cur_block(step_block);
4696 if (statement->step != NULL) {
4697 expression_to_firm(statement->step);
4699 ir_node *const step_jmp = new_Jmp();
4701 /* create the header block */
4702 ir_node *const header_block = new_immBlock();
4703 set_cur_block(header_block);
4705 add_immBlock_pred(header_block, jmp);
4707 add_immBlock_pred(header_block, step_jmp);
4709 /* the false block */
4710 ir_node *const false_block = new_immBlock();
4713 ir_node *body_block;
4714 if (statement->body != NULL) {
4715 ir_node *const old_continue_label = continue_label;
4716 ir_node *const old_break_label = break_label;
4717 continue_label = step_block;
4718 break_label = false_block;
4720 body_block = new_immBlock();
4721 set_cur_block(body_block);
4722 statement_to_firm(statement->body);
4724 assert(continue_label == step_block);
4725 assert(break_label == false_block);
4726 continue_label = old_continue_label;
4727 break_label = old_break_label;
4729 if (get_cur_block() != NULL) {
4731 add_immBlock_pred(step_block, jmp);
4734 body_block = step_block;
4737 /* create the condition */
4738 set_cur_block(header_block);
4739 if (statement->condition != NULL) {
4740 create_condition_evaluation(statement->condition, body_block,
4743 keep_alive(header_block);
4744 keep_all_memory(header_block);
4746 add_immBlock_pred(body_block, jmp);
4749 mature_immBlock(body_block);
4750 mature_immBlock(false_block);
4751 mature_immBlock(step_block);
4752 mature_immBlock(header_block);
4753 mature_immBlock(false_block);
4755 set_cur_block(false_block);
4758 static void create_jump_statement(const statement_t *statement,
4759 ir_node *target_block)
4761 if (get_cur_block() == NULL)
4764 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4765 ir_node *jump = new_d_Jmp(dbgi);
4766 add_immBlock_pred(target_block, jump);
4768 set_cur_block(NULL);
4771 static ir_node *get_break_label(void)
4773 if (break_label == NULL) {
4774 break_label = new_immBlock();
4779 static void switch_statement_to_firm(switch_statement_t *statement)
4781 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4783 ir_node *expression = expression_to_firm(statement->expression);
4784 ir_node *cond = new_d_Cond(dbgi, expression);
4786 set_cur_block(NULL);
4788 ir_node *const old_switch_cond = current_switch_cond;
4789 ir_node *const old_break_label = break_label;
4790 const bool old_saw_default_label = saw_default_label;
4791 saw_default_label = false;
4792 current_switch_cond = cond;
4794 switch_statement_t *const old_switch = current_switch;
4795 current_switch = statement;
4797 /* determine a free number for the default label */
4798 unsigned long num_cases = 0;
4800 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4801 if (l->expression == NULL) {
4805 if (l->last_case >= l->first_case)
4806 num_cases += l->last_case - l->first_case + 1;
4807 if (l->last_case > def_nr)
4808 def_nr = l->last_case;
4811 if (def_nr == INT_MAX) {
4812 /* Bad: an overflow will occurr, we cannot be sure that the
4813 * maximum + 1 is a free number. Scan the values a second
4814 * time to find a free number.
4816 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4818 memset(bits, 0, (num_cases + 7) >> 3);
4819 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4820 if (l->expression == NULL) {
4824 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4825 if (start < num_cases && l->last_case >= 0) {
4826 unsigned long end = (unsigned long)l->last_case < num_cases ?
4827 (unsigned long)l->last_case : num_cases - 1;
4828 for (unsigned long cns = start; cns <= end; ++cns) {
4829 bits[cns >> 3] |= (1 << (cns & 7));
4833 /* We look at the first num_cases constants:
4834 * Either they are densed, so we took the last (num_cases)
4835 * one, or they are non densed, so we will find one free
4839 for (i = 0; i < num_cases; ++i)
4840 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4848 statement->default_proj_nr = def_nr;
4850 if (statement->body != NULL) {
4851 statement_to_firm(statement->body);
4854 if (get_cur_block() != NULL) {
4855 ir_node *jmp = new_Jmp();
4856 add_immBlock_pred(get_break_label(), jmp);
4859 if (!saw_default_label) {
4860 set_cur_block(get_nodes_block(cond));
4861 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4862 statement->default_proj_nr);
4863 add_immBlock_pred(get_break_label(), proj);
4866 if (break_label != NULL) {
4867 mature_immBlock(break_label);
4869 set_cur_block(break_label);
4871 assert(current_switch_cond == cond);
4872 current_switch = old_switch;
4873 current_switch_cond = old_switch_cond;
4874 break_label = old_break_label;
4875 saw_default_label = old_saw_default_label;
4878 static void case_label_to_firm(const case_label_statement_t *statement)
4880 if (statement->is_empty_range)
4883 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4885 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4888 ir_node *block = new_immBlock();
4890 set_cur_block(get_nodes_block(current_switch_cond));
4891 if (statement->expression != NULL) {
4892 long pn = statement->first_case;
4893 long end_pn = statement->last_case;
4894 assert(pn <= end_pn);
4895 /* create jumps for all cases in the given range */
4897 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4898 add_immBlock_pred(block, proj);
4899 } while(pn++ < end_pn);
4901 saw_default_label = true;
4902 proj = new_d_defaultProj(dbgi, current_switch_cond,
4903 current_switch->default_proj_nr);
4905 add_immBlock_pred(block, proj);
4908 if (fallthrough != NULL) {
4909 add_immBlock_pred(block, fallthrough);
4911 mature_immBlock(block);
4912 set_cur_block(block);
4914 if (statement->statement != NULL) {
4915 statement_to_firm(statement->statement);
4919 static void label_to_firm(const label_statement_t *statement)
4921 ir_node *block = get_label_block(statement->label);
4923 if (get_cur_block() != NULL) {
4924 ir_node *jmp = new_Jmp();
4925 add_immBlock_pred(block, jmp);
4928 set_cur_block(block);
4930 keep_all_memory(block);
4932 if (statement->statement != NULL) {
4933 statement_to_firm(statement->statement);
4937 static void goto_to_firm(const goto_statement_t *statement)
4939 if (get_cur_block() == NULL)
4942 if (statement->expression) {
4943 ir_node *irn = expression_to_firm(statement->expression);
4944 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4945 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4947 set_irn_link(ijmp, ijmp_list);
4950 ir_node *block = get_label_block(statement->label);
4951 ir_node *jmp = new_Jmp();
4952 add_immBlock_pred(block, jmp);
4954 set_cur_block(NULL);
4957 static void asm_statement_to_firm(const asm_statement_t *statement)
4959 bool needs_memory = false;
4961 if (statement->is_volatile) {
4962 needs_memory = true;
4965 size_t n_clobbers = 0;
4966 asm_clobber_t *clobber = statement->clobbers;
4967 for ( ; clobber != NULL; clobber = clobber->next) {
4968 const char *clobber_str = clobber->clobber.begin;
4970 if (!be_is_valid_clobber(clobber_str)) {
4971 errorf(&statement->base.source_position,
4972 "invalid clobber '%s' specified", clobber->clobber);
4976 if (strcmp(clobber_str, "memory") == 0) {
4977 needs_memory = true;
4981 ident *id = new_id_from_str(clobber_str);
4982 obstack_ptr_grow(&asm_obst, id);
4985 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4986 ident **clobbers = NULL;
4987 if (n_clobbers > 0) {
4988 clobbers = obstack_finish(&asm_obst);
4991 size_t n_inputs = 0;
4992 asm_argument_t *argument = statement->inputs;
4993 for ( ; argument != NULL; argument = argument->next)
4995 size_t n_outputs = 0;
4996 argument = statement->outputs;
4997 for ( ; argument != NULL; argument = argument->next)
5000 unsigned next_pos = 0;
5002 ir_node *ins[n_inputs + n_outputs + 1];
5005 ir_asm_constraint tmp_in_constraints[n_outputs];
5007 const expression_t *out_exprs[n_outputs];
5008 ir_node *out_addrs[n_outputs];
5009 size_t out_size = 0;
5011 argument = statement->outputs;
5012 for ( ; argument != NULL; argument = argument->next) {
5013 const char *constraints = argument->constraints.begin;
5014 asm_constraint_flags_t asm_flags
5015 = be_parse_asm_constraints(constraints);
5017 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5018 warningf(&statement->base.source_position,
5019 "some constraints in '%s' are not supported", constraints);
5021 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5022 errorf(&statement->base.source_position,
5023 "some constraints in '%s' are invalid", constraints);
5026 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5027 errorf(&statement->base.source_position,
5028 "no write flag specified for output constraints '%s'",
5033 unsigned pos = next_pos++;
5034 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5035 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5036 expression_t *expr = argument->expression;
5037 ir_node *addr = expression_to_addr(expr);
5038 /* in+output, construct an artifical same_as constraint on the
5040 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5042 ir_node *value = get_value_from_lvalue(expr, addr);
5044 snprintf(buf, sizeof(buf), "%u", pos);
5046 ir_asm_constraint constraint;
5047 constraint.pos = pos;
5048 constraint.constraint = new_id_from_str(buf);
5049 constraint.mode = get_ir_mode_storage(expr->base.type);
5050 tmp_in_constraints[in_size] = constraint;
5051 ins[in_size] = value;
5056 out_exprs[out_size] = expr;
5057 out_addrs[out_size] = addr;
5059 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5060 /* pure memory ops need no input (but we have to make sure we
5061 * attach to the memory) */
5062 assert(! (asm_flags &
5063 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5064 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5065 needs_memory = true;
5067 /* we need to attach the address to the inputs */
5068 expression_t *expr = argument->expression;
5070 ir_asm_constraint constraint;
5071 constraint.pos = pos;
5072 constraint.constraint = new_id_from_str(constraints);
5073 constraint.mode = NULL;
5074 tmp_in_constraints[in_size] = constraint;
5076 ins[in_size] = expression_to_addr(expr);
5080 errorf(&statement->base.source_position,
5081 "only modifiers but no place set in constraints '%s'",
5086 ir_asm_constraint constraint;
5087 constraint.pos = pos;
5088 constraint.constraint = new_id_from_str(constraints);
5089 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5091 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5093 assert(obstack_object_size(&asm_obst)
5094 == out_size * sizeof(ir_asm_constraint));
5095 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5098 obstack_grow(&asm_obst, tmp_in_constraints,
5099 in_size * sizeof(tmp_in_constraints[0]));
5100 /* find and count input and output arguments */
5101 argument = statement->inputs;
5102 for ( ; argument != NULL; argument = argument->next) {
5103 const char *constraints = argument->constraints.begin;
5104 asm_constraint_flags_t asm_flags
5105 = be_parse_asm_constraints(constraints);
5107 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5108 errorf(&statement->base.source_position,
5109 "some constraints in '%s' are not supported", constraints);
5112 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5113 errorf(&statement->base.source_position,
5114 "some constraints in '%s' are invalid", constraints);
5117 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5118 errorf(&statement->base.source_position,
5119 "write flag specified for input constraints '%s'",
5125 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5126 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5127 /* we can treat this as "normal" input */
5128 input = expression_to_firm(argument->expression);
5129 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5130 /* pure memory ops need no input (but we have to make sure we
5131 * attach to the memory) */
5132 assert(! (asm_flags &
5133 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5134 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5135 needs_memory = true;
5136 input = expression_to_addr(argument->expression);
5138 errorf(&statement->base.source_position,
5139 "only modifiers but no place set in constraints '%s'",
5144 ir_asm_constraint constraint;
5145 constraint.pos = next_pos++;
5146 constraint.constraint = new_id_from_str(constraints);
5147 constraint.mode = get_irn_mode(input);
5149 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5150 ins[in_size++] = input;
5154 ir_asm_constraint constraint;
5155 constraint.pos = next_pos++;
5156 constraint.constraint = new_id_from_str("");
5157 constraint.mode = mode_M;
5159 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5160 ins[in_size++] = get_store();
5163 assert(obstack_object_size(&asm_obst)
5164 == in_size * sizeof(ir_asm_constraint));
5165 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5167 /* create asm node */
5168 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5170 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5172 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5173 out_size, output_constraints,
5174 n_clobbers, clobbers, asm_text);
5176 if (statement->is_volatile) {
5177 set_irn_pinned(node, op_pin_state_pinned);
5179 set_irn_pinned(node, op_pin_state_floats);
5182 /* create output projs & connect them */
5184 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5189 for (i = 0; i < out_size; ++i) {
5190 const expression_t *out_expr = out_exprs[i];
5192 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5193 ir_node *proj = new_Proj(node, mode, pn);
5194 ir_node *addr = out_addrs[i];
5196 set_value_for_expression_addr(out_expr, proj, addr);
5200 static void ms_try_statement_to_firm(ms_try_statement_t *statement)
5202 statement_to_firm(statement->try_statement);
5203 warningf(&statement->base.source_position, "structured exception handling ignored");
5206 static void leave_statement_to_firm(leave_statement_t *statement)
5208 errorf(&statement->base.source_position, "__leave not supported yet");
5212 * Transform a statement.
5214 static void statement_to_firm(statement_t *statement)
5217 assert(!statement->base.transformed);
5218 statement->base.transformed = true;
5221 switch (statement->kind) {
5222 case STATEMENT_INVALID:
5223 panic("invalid statement found");
5224 case STATEMENT_EMPTY:
5227 case STATEMENT_COMPOUND:
5228 compound_statement_to_firm(&statement->compound);
5230 case STATEMENT_RETURN:
5231 return_statement_to_firm(&statement->returns);
5233 case STATEMENT_EXPRESSION:
5234 expression_statement_to_firm(&statement->expression);
5237 if_statement_to_firm(&statement->ifs);
5239 case STATEMENT_WHILE:
5240 while_statement_to_firm(&statement->whiles);
5242 case STATEMENT_DO_WHILE:
5243 do_while_statement_to_firm(&statement->do_while);
5245 case STATEMENT_DECLARATION:
5246 declaration_statement_to_firm(&statement->declaration);
5248 case STATEMENT_BREAK:
5249 create_jump_statement(statement, get_break_label());
5251 case STATEMENT_CONTINUE:
5252 create_jump_statement(statement, continue_label);
5254 case STATEMENT_SWITCH:
5255 switch_statement_to_firm(&statement->switchs);
5257 case STATEMENT_CASE_LABEL:
5258 case_label_to_firm(&statement->case_label);
5261 for_statement_to_firm(&statement->fors);
5263 case STATEMENT_LABEL:
5264 label_to_firm(&statement->label);
5266 case STATEMENT_GOTO:
5267 goto_to_firm(&statement->gotos);
5270 asm_statement_to_firm(&statement->asms);
5272 case STATEMENT_MS_TRY:
5273 ms_try_statement_to_firm(&statement->ms_try);
5275 case STATEMENT_LEAVE:
5276 leave_statement_to_firm(&statement->leave);
5279 panic("statement not implemented");
5282 static int count_local_variables(const entity_t *entity,
5283 const entity_t *const last)
5286 entity_t const *const end = last != NULL ? last->base.next : NULL;
5287 for (; entity != end; entity = entity->base.next) {
5291 if (entity->kind == ENTITY_VARIABLE) {
5292 type = skip_typeref(entity->declaration.type);
5293 address_taken = entity->variable.address_taken;
5294 } else if (entity->kind == ENTITY_PARAMETER) {
5295 type = skip_typeref(entity->declaration.type);
5296 address_taken = entity->parameter.address_taken;
5301 if (!address_taken && is_type_scalar(type))
5307 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5309 int *const count = env;
5311 switch (stmt->kind) {
5312 case STATEMENT_DECLARATION: {
5313 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5314 *count += count_local_variables(decl_stmt->declarations_begin,
5315 decl_stmt->declarations_end);
5320 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5328 static int get_function_n_local_vars(entity_t *entity)
5332 /* count parameters */
5333 count += count_local_variables(entity->function.parameters.entities, NULL);
5335 /* count local variables declared in body */
5336 walk_statements(entity->function.statement, count_local_variables_in_stmt,
5341 static void initialize_function_parameters(entity_t *entity)
5343 assert(entity->kind == ENTITY_FUNCTION);
5344 ir_graph *irg = current_ir_graph;
5345 ir_node *args = get_irg_args(irg);
5346 ir_node *start_block = get_irg_start_block(irg);
5347 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5350 entity_t *parameter = entity->function.parameters.entities;
5351 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5352 if (parameter->kind != ENTITY_PARAMETER)
5355 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5356 type_t *type = skip_typeref(parameter->declaration.type);
5358 bool needs_entity = parameter->parameter.address_taken;
5359 assert(!is_type_array(type));
5360 if (is_type_compound(type)) {
5361 needs_entity = true;
5365 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5366 ident *id = new_id_from_str(parameter->base.symbol->string);
5367 set_entity_ident(entity, id);
5369 parameter->declaration.kind
5370 = DECLARATION_KIND_PARAMETER_ENTITY;
5371 parameter->parameter.v.entity = entity;
5375 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5376 ir_mode *param_mode = get_type_mode(param_irtype);
5379 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5381 ir_mode *mode = get_ir_mode_storage(type);
5382 value = create_conv(NULL, value, mode);
5383 value = do_strict_conv(NULL, value);
5385 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5386 parameter->parameter.v.value_number = next_value_number_function;
5387 set_irg_loc_description(current_ir_graph, next_value_number_function,
5389 ++next_value_number_function;
5391 set_value(parameter->parameter.v.value_number, value);
5396 * Handle additional decl modifiers for IR-graphs
5398 * @param irg the IR-graph
5399 * @param dec_modifiers additional modifiers
5401 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5403 if (decl_modifiers & DM_RETURNS_TWICE) {
5404 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5405 set_irg_additional_property(irg, mtp_property_returns_twice);
5407 if (decl_modifiers & DM_NORETURN) {
5408 /* TRUE if the declaration includes the Microsoft
5409 __declspec(noreturn) specifier. */
5410 set_irg_additional_property(irg, mtp_property_noreturn);
5412 if (decl_modifiers & DM_NOTHROW) {
5413 /* TRUE if the declaration includes the Microsoft
5414 __declspec(nothrow) specifier. */
5415 set_irg_additional_property(irg, mtp_property_nothrow);
5417 if (decl_modifiers & DM_NAKED) {
5418 /* TRUE if the declaration includes the Microsoft
5419 __declspec(naked) specifier. */
5420 set_irg_additional_property(irg, mtp_property_naked);
5422 if (decl_modifiers & DM_FORCEINLINE) {
5423 /* TRUE if the declaration includes the
5424 Microsoft __forceinline specifier. */
5425 set_irg_inline_property(irg, irg_inline_forced);
5427 if (decl_modifiers & DM_NOINLINE) {
5428 /* TRUE if the declaration includes the Microsoft
5429 __declspec(noinline) specifier. */
5430 set_irg_inline_property(irg, irg_inline_forbidden);
5434 static void add_function_pointer(ir_type *segment, ir_entity *method,
5435 const char *unique_template)
5437 ir_type *method_type = get_entity_type(method);
5438 ident *id = id_unique(unique_template);
5439 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5441 ident *ide = id_unique(unique_template);
5442 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5443 ir_graph *irg = get_const_code_irg();
5444 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5447 set_entity_compiler_generated(ptr, 1);
5448 set_entity_variability(ptr, variability_constant);
5449 set_atomic_ent_value(ptr, val);
5453 * Generate possible IJmp branches to a given label block.
5455 static void gen_ijmp_branches(ir_node *block)
5458 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5459 add_immBlock_pred(block, ijmp);
5464 * Create code for a function.
5466 static void create_function(entity_t *entity)
5468 assert(entity->kind == ENTITY_FUNCTION);
5469 ir_entity *function_entity = get_function_entity(entity);
5471 if (entity->function.statement == NULL)
5474 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5475 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5476 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5478 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5479 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5480 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5483 current_function_entity = entity;
5484 current_function_name = NULL;
5485 current_funcsig = NULL;
5487 assert(all_labels == NULL);
5488 all_labels = NEW_ARR_F(label_t *, 0);
5491 int n_local_vars = get_function_n_local_vars(entity);
5492 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5494 ir_graph *old_current_function = current_function;
5495 current_function = irg;
5497 set_irg_fp_model(irg, firm_opt.fp_model);
5498 tarval_enable_fp_ops(1);
5499 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5501 ir_node *first_block = get_cur_block();
5503 /* set inline flags */
5504 if (entity->function.is_inline)
5505 set_irg_inline_property(irg, irg_inline_recomended);
5506 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5508 next_value_number_function = 0;
5509 initialize_function_parameters(entity);
5511 statement_to_firm(entity->function.statement);
5513 ir_node *end_block = get_irg_end_block(irg);
5515 /* do we have a return statement yet? */
5516 if (get_cur_block() != NULL) {
5517 type_t *type = skip_typeref(entity->declaration.type);
5518 assert(is_type_function(type));
5519 const function_type_t *func_type = &type->function;
5520 const type_t *return_type
5521 = skip_typeref(func_type->return_type);
5524 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5525 ret = new_Return(get_store(), 0, NULL);
5528 if (is_type_scalar(return_type)) {
5529 mode = get_ir_mode_storage(func_type->return_type);
5535 /* ยง5.1.2.2.3 main implicitly returns 0 */
5536 if (is_main(entity)) {
5537 in[0] = new_Const(get_mode_null(mode));
5539 in[0] = new_Unknown(mode);
5541 ret = new_Return(get_store(), 1, in);
5543 add_immBlock_pred(end_block, ret);
5546 bool has_computed_gotos = false;
5547 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5548 label_t *label = all_labels[i];
5549 if (label->address_taken) {
5550 gen_ijmp_branches(label->block);
5551 has_computed_gotos = true;
5553 mature_immBlock(label->block);
5555 if (has_computed_gotos) {
5556 /* if we have computed goto's in the function, we cannot inline it */
5557 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5558 warningf(&entity->base.source_position,
5559 "function '%Y' can never be inlined because it contains a computed goto",
5560 entity->base.symbol);
5562 set_irg_inline_property(irg, irg_inline_forbidden);
5565 DEL_ARR_F(all_labels);
5568 mature_immBlock(first_block);
5569 mature_immBlock(end_block);
5571 irg_finalize_cons(irg);
5573 /* finalize the frame type */
5574 ir_type *frame_type = get_irg_frame_type(irg);
5575 int n = get_compound_n_members(frame_type);
5578 for (int i = 0; i < n; ++i) {
5579 ir_entity *entity = get_compound_member(frame_type, i);
5580 ir_type *entity_type = get_entity_type(entity);
5582 int align = get_type_alignment_bytes(entity_type);
5583 if (align > align_all)
5587 misalign = offset % align;
5589 offset += align - misalign;
5593 set_entity_offset(entity, offset);
5594 offset += get_type_size_bytes(entity_type);
5596 set_type_size_bytes(frame_type, offset);
5597 set_type_alignment_bytes(frame_type, align_all);
5600 current_function = old_current_function;
5602 /* create inner functions */
5604 for (inner = next_inner_function(); inner != NULL;
5605 inner = next_inner_function()) {
5606 create_function(inner);
5610 static void scope_to_firm(scope_t *scope)
5612 /* first pass: create declarations */
5613 entity_t *entity = scope->entities;
5614 for ( ; entity != NULL; entity = entity->base.next) {
5615 if (entity->base.symbol == NULL)
5618 if (entity->kind == ENTITY_FUNCTION) {
5619 get_function_entity(entity);
5620 } else if (entity->kind == ENTITY_VARIABLE) {
5621 create_global_variable(entity);
5625 /* second pass: create code/initializers */
5626 entity = scope->entities;
5627 for ( ; entity != NULL; entity = entity->base.next) {
5628 if (entity->base.symbol == NULL)
5631 if (entity->kind == ENTITY_FUNCTION) {
5632 create_function(entity);
5633 } else if (entity->kind == ENTITY_VARIABLE) {
5634 assert(entity->declaration.kind
5635 == DECLARATION_KIND_GLOBAL_VARIABLE);
5636 current_ir_graph = get_const_code_irg();
5637 create_variable_initializer(entity);
5642 void init_ast2firm(void)
5644 obstack_init(&asm_obst);
5645 init_atomic_modes();
5647 /* OS option must be set to the backend */
5648 switch (firm_opt.os_support) {
5649 case OS_SUPPORT_MINGW:
5650 create_ld_ident = create_name_win32;
5652 case OS_SUPPORT_LINUX:
5653 create_ld_ident = create_name_linux_elf;
5655 case OS_SUPPORT_MACHO:
5656 create_ld_ident = create_name_macho;
5659 panic("unexpected OS support mode");
5662 /* create idents for all known runtime functions */
5663 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5664 rts_idents[i] = new_id_from_str(rts_data[i].name);
5667 entitymap_init(&entitymap);
5670 static void init_ir_types(void)
5672 static int ir_types_initialized = 0;
5673 if (ir_types_initialized)
5675 ir_types_initialized = 1;
5677 ir_type_int = get_ir_type(type_int);
5678 ir_type_const_char = get_ir_type(type_const_char);
5679 ir_type_wchar_t = get_ir_type(type_wchar_t);
5680 ir_type_void = get_ir_type(type_void);
5682 const backend_params *be_params = be_get_backend_param();
5683 mode_float_arithmetic = be_params->mode_float_arithmetic;
5686 void exit_ast2firm(void)
5688 entitymap_destroy(&entitymap);
5689 obstack_free(&asm_obst, NULL);
5692 static void global_asm_to_firm(statement_t *s)
5694 for (; s != NULL; s = s->base.next) {
5695 assert(s->kind == STATEMENT_ASM);
5697 char const *const text = s->asms.asm_text.begin;
5698 size_t size = s->asms.asm_text.size;
5700 /* skip the last \0 */
5701 if (text[size - 1] == '\0')
5704 ident *const id = new_id_from_chars(text, size);
5709 void translation_unit_to_firm(translation_unit_t *unit)
5711 /* just to be sure */
5712 continue_label = NULL;
5714 current_switch_cond = NULL;
5715 current_translation_unit = unit;
5718 inner_functions = NEW_ARR_F(entity_t *, 0);
5720 scope_to_firm(&unit->scope);
5721 global_asm_to_firm(unit->global_asm);
5723 DEL_ARR_F(inner_functions);
5724 inner_functions = NULL;
5726 current_ir_graph = NULL;
5727 current_translation_unit = NULL;