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 : 0;
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 neccessary.
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);
1651 panic("unsupported builtin found");
1656 * Transform a call expression.
1657 * Handles some special cases, like alloca() calls, which must be resolved
1658 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1659 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1662 static ir_node *call_expression_to_firm(const call_expression_t *call)
1664 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1665 assert(get_cur_block() != NULL);
1667 expression_t *function = call->function;
1668 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1669 return process_builtin_call(call);
1671 if (function->kind == EXPR_REFERENCE) {
1672 const reference_expression_t *ref = &function->reference;
1673 entity_t *entity = ref->entity;
1675 if (entity->kind == ENTITY_FUNCTION
1676 && entity->function.entity == rts_entities[rts_alloca]) {
1677 /* handle alloca() call */
1678 expression_t *argument = call->arguments->expression;
1679 ir_node *size = expression_to_firm(argument);
1680 ir_mode *mode = get_ir_mode_arithmetic(type_size_t);
1682 size = create_conv(dbgi, size, mode);
1684 ir_node *store = get_store();
1685 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1686 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1688 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1690 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1695 ir_node *callee = expression_to_firm(function);
1697 type_t *type = skip_typeref(function->base.type);
1698 assert(is_type_pointer(type));
1699 pointer_type_t *pointer_type = &type->pointer;
1700 type_t *points_to = skip_typeref(pointer_type->points_to);
1701 assert(is_type_function(points_to));
1702 function_type_t *function_type = &points_to->function;
1704 int n_parameters = 0;
1705 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1706 ir_type *new_method_type = NULL;
1707 if (function_type->variadic || function_type->unspecified_parameters) {
1708 const call_argument_t *argument = call->arguments;
1709 for ( ; argument != NULL; argument = argument->next) {
1713 /* we need to construct a new method type matching the call
1715 int n_res = get_method_n_ress(ir_method_type);
1716 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1717 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1718 n_parameters, n_res, dbgi);
1719 set_method_calling_convention(new_method_type,
1720 get_method_calling_convention(ir_method_type));
1721 set_method_additional_properties(new_method_type,
1722 get_method_additional_properties(ir_method_type));
1723 set_method_variadicity(new_method_type,
1724 get_method_variadicity(ir_method_type));
1726 for (int i = 0; i < n_res; ++i) {
1727 set_method_res_type(new_method_type, i,
1728 get_method_res_type(ir_method_type, i));
1730 argument = call->arguments;
1731 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1732 expression_t *expression = argument->expression;
1733 ir_type *irtype = get_ir_type(expression->base.type);
1734 set_method_param_type(new_method_type, i, irtype);
1736 ir_method_type = new_method_type;
1738 n_parameters = get_method_n_params(ir_method_type);
1741 ir_node *in[n_parameters];
1743 const call_argument_t *argument = call->arguments;
1744 for (int n = 0; n < n_parameters; ++n) {
1745 expression_t *expression = argument->expression;
1746 ir_node *arg_node = expression_to_firm(expression);
1748 type_t *type = skip_typeref(expression->base.type);
1749 if (!is_type_compound(type)) {
1750 ir_mode *mode = get_ir_mode_storage(expression->base.type);
1751 arg_node = create_conv(dbgi, arg_node, mode);
1752 arg_node = do_strict_conv(dbgi, arg_node);
1757 argument = argument->next;
1760 ir_node *store = get_store();
1761 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1763 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1766 type_t *return_type = skip_typeref(function_type->return_type);
1767 ir_node *result = NULL;
1769 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1770 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1772 if (is_type_scalar(return_type)) {
1773 ir_mode *mode = get_ir_mode_storage(return_type);
1774 result = new_d_Proj(dbgi, resproj, mode, 0);
1775 ir_mode *mode_arith = get_ir_mode_arithmetic(return_type);
1776 result = create_conv(NULL, result, mode_arith);
1778 ir_mode *mode = mode_P_data;
1779 result = new_d_Proj(dbgi, resproj, mode, 0);
1783 if (function->kind == EXPR_REFERENCE &&
1784 function->reference.entity->declaration.modifiers & DM_NORETURN) {
1785 /* A dead end: Keep the Call and the Block. Also place all further
1786 * nodes into a new and unreachable block. */
1788 keep_alive(get_cur_block());
1795 static void statement_to_firm(statement_t *statement);
1796 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1798 static ir_node *expression_to_addr(const expression_t *expression);
1799 static ir_node *create_condition_evaluation(const expression_t *expression,
1800 ir_node *true_block,
1801 ir_node *false_block);
1803 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1806 if (!is_type_compound(type)) {
1807 ir_mode *mode = get_ir_mode_storage(type);
1808 value = create_conv(dbgi, value, mode);
1809 value = do_strict_conv(dbgi, value);
1812 ir_node *memory = get_store();
1814 if (is_type_scalar(type)) {
1815 ir_cons_flags flags = type->base.qualifiers & TYPE_QUALIFIER_VOLATILE
1816 ? cons_volatile : 0;
1817 ir_node *store = new_d_Store(dbgi, memory, addr, value, flags);
1818 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1819 set_store(store_mem);
1821 ir_type *irtype = get_ir_type(type);
1822 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1823 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1824 set_store(copyb_mem);
1828 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1830 tarval *all_one = get_mode_all_one(mode);
1831 int mode_size = get_mode_size_bits(mode);
1833 assert(offset >= 0);
1835 assert(offset + size <= mode_size);
1836 if (size == mode_size) {
1840 long shiftr = get_mode_size_bits(mode) - size;
1841 long shiftl = offset;
1842 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1843 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1844 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1845 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1850 static ir_node *bitfield_store_to_firm(dbg_info *dbgi,
1851 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1853 ir_type *entity_type = get_entity_type(entity);
1854 ir_type *base_type = get_primitive_base_type(entity_type);
1855 assert(base_type != NULL);
1856 ir_mode *mode = get_type_mode(base_type);
1858 value = create_conv(dbgi, value, mode);
1860 /* kill upper bits of value and shift to right position */
1861 int bitoffset = get_entity_offset_bits_remainder(entity);
1862 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1864 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1865 ir_node *mask_node = new_d_Const(dbgi, mask);
1866 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1867 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1868 ir_node *shiftcount = new_d_Const(dbgi, shiftl);
1869 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1871 /* load current value */
1872 ir_node *mem = get_store();
1873 ir_node *load = new_d_Load(dbgi, mem, addr, mode,
1874 set_volatile ? cons_volatile : 0);
1875 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1876 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1877 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1878 tarval *inv_mask = tarval_not(shift_mask);
1879 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1880 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1882 /* construct new value and store */
1883 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1884 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val,
1885 set_volatile ? cons_volatile : 0);
1886 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1887 set_store(store_mem);
1889 return value_masked;
1892 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1895 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1896 type_t *type = expression->base.type;
1897 ir_mode *mode = get_ir_mode_storage(type);
1898 ir_node *mem = get_store();
1899 ir_node *load = new_d_Load(dbgi, mem, addr, mode, 0);
1900 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1901 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1903 load_res = create_conv(dbgi, load_res, mode_int);
1905 set_store(load_mem);
1907 /* kill upper bits */
1908 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1909 ir_entity *entity = expression->compound_entry->compound_member.entity;
1910 int bitoffset = get_entity_offset_bits_remainder(entity);
1911 ir_type *entity_type = get_entity_type(entity);
1912 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1913 long shift_bitsl = machine_size - bitoffset - bitsize;
1914 assert(shift_bitsl >= 0);
1915 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1916 ir_node *countl = new_d_Const(dbgi, tvl);
1917 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1919 long shift_bitsr = bitoffset + shift_bitsl;
1920 assert(shift_bitsr <= (long) machine_size);
1921 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1922 ir_node *countr = new_d_Const(dbgi, tvr);
1924 if (mode_is_signed(mode)) {
1925 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1927 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1930 return create_conv(dbgi, shiftr, mode);
1933 /* make sure the selected compound type is constructed */
1934 static void construct_select_compound(const select_expression_t *expression)
1936 type_t *type = skip_typeref(expression->compound->base.type);
1937 if (is_type_pointer(type)) {
1938 type = type->pointer.points_to;
1940 (void) get_ir_type(type);
1943 static ir_node *set_value_for_expression_addr(const expression_t *expression,
1944 ir_node *value, ir_node *addr)
1946 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1947 type_t *type = skip_typeref(expression->base.type);
1949 if (!is_type_compound(type)) {
1950 ir_mode *mode = get_ir_mode_storage(type);
1951 value = create_conv(dbgi, value, mode);
1952 value = do_strict_conv(dbgi, value);
1955 if (expression->kind == EXPR_REFERENCE) {
1956 const reference_expression_t *ref = &expression->reference;
1958 entity_t *entity = ref->entity;
1959 assert(is_declaration(entity));
1960 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1961 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1962 set_value(entity->variable.v.value_number, value);
1964 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1965 set_value(entity->parameter.v.value_number, value);
1971 addr = expression_to_addr(expression);
1972 assert(addr != NULL);
1974 if (expression->kind == EXPR_SELECT) {
1975 const select_expression_t *select = &expression->select;
1977 construct_select_compound(select);
1979 entity_t *entity = select->compound_entry;
1980 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1981 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1982 ir_entity *irentity = entity->compound_member.entity;
1984 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1985 value = bitfield_store_to_firm(dbgi, irentity, addr, value,
1991 assign_value(dbgi, addr, type, value);
1995 static void set_value_for_expression(const expression_t *expression,
1998 set_value_for_expression_addr(expression, value, NULL);
2001 static ir_node *get_value_from_lvalue(const expression_t *expression,
2004 if (expression->kind == EXPR_REFERENCE) {
2005 const reference_expression_t *ref = &expression->reference;
2007 entity_t *entity = ref->entity;
2008 assert(entity->kind == ENTITY_VARIABLE
2009 || entity->kind == ENTITY_PARAMETER);
2010 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2012 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
2013 value_number = entity->variable.v.value_number;
2014 assert(addr == NULL);
2015 type_t *type = skip_typeref(expression->base.type);
2016 ir_mode *mode = get_ir_mode_storage(type);
2017 ir_node *res = get_value(value_number, mode);
2018 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2019 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
2020 value_number = entity->parameter.v.value_number;
2021 assert(addr == NULL);
2022 type_t *type = skip_typeref(expression->base.type);
2023 ir_mode *mode = get_ir_mode_storage(type);
2024 ir_node *res = get_value(value_number, mode);
2025 return create_conv(NULL, res, get_ir_mode_arithmetic(type));
2029 assert(addr != NULL);
2030 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2033 if (expression->kind == EXPR_SELECT &&
2034 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
2035 construct_select_compound(&expression->select);
2036 value = bitfield_extract_to_firm(&expression->select, addr);
2038 value = deref_address(dbgi, expression->base.type, addr);
2045 static ir_node *create_incdec(const unary_expression_t *expression)
2047 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2048 const expression_t *value_expr = expression->value;
2049 ir_node *addr = expression_to_addr(value_expr);
2050 ir_node *value = get_value_from_lvalue(value_expr, addr);
2052 type_t *type = skip_typeref(expression->base.type);
2053 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2056 if (is_type_pointer(type)) {
2057 pointer_type_t *pointer_type = &type->pointer;
2058 offset = get_type_size(pointer_type->points_to);
2060 assert(is_type_arithmetic(type));
2061 offset = new_Const(get_mode_one(mode));
2065 ir_node *store_value;
2066 switch(expression->base.kind) {
2067 case EXPR_UNARY_POSTFIX_INCREMENT:
2069 store_value = new_d_Add(dbgi, value, offset, mode);
2071 case EXPR_UNARY_POSTFIX_DECREMENT:
2073 store_value = new_d_Sub(dbgi, value, offset, mode);
2075 case EXPR_UNARY_PREFIX_INCREMENT:
2076 result = new_d_Add(dbgi, value, offset, mode);
2077 store_value = result;
2079 case EXPR_UNARY_PREFIX_DECREMENT:
2080 result = new_d_Sub(dbgi, value, offset, mode);
2081 store_value = result;
2084 panic("no incdec expr in create_incdec");
2087 set_value_for_expression_addr(value_expr, store_value, addr);
2092 static bool is_local_variable(expression_t *expression)
2094 if (expression->kind != EXPR_REFERENCE)
2096 reference_expression_t *ref_expr = &expression->reference;
2097 entity_t *entity = ref_expr->entity;
2098 if (entity->kind != ENTITY_VARIABLE)
2100 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2101 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2104 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2107 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2108 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2109 case EXPR_BINARY_NOTEQUAL:
2110 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2111 case EXPR_BINARY_ISLESS:
2112 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2113 case EXPR_BINARY_ISLESSEQUAL:
2114 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2115 case EXPR_BINARY_ISGREATER:
2116 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2117 case EXPR_BINARY_ISGREATEREQUAL:
2118 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2119 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2124 panic("trying to get pn_Cmp from non-comparison binexpr type");
2128 * Handle the assume optimizer hint: check if a Confirm
2129 * node can be created.
2131 * @param dbi debug info
2132 * @param expr the IL assume expression
2134 * we support here only some simple cases:
2139 static ir_node *handle_assume_compare(dbg_info *dbi,
2140 const binary_expression_t *expression)
2142 expression_t *op1 = expression->left;
2143 expression_t *op2 = expression->right;
2144 entity_t *var2, *var = NULL;
2145 ir_node *res = NULL;
2148 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2150 if (is_local_variable(op1) && is_local_variable(op2)) {
2151 var = op1->reference.entity;
2152 var2 = op2->reference.entity;
2154 type_t *const type = skip_typeref(var->declaration.type);
2155 ir_mode *const mode = get_ir_mode_storage(type);
2157 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2158 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2160 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2161 set_value(var2->variable.v.value_number, res);
2163 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2164 set_value(var->variable.v.value_number, res);
2170 if (is_local_variable(op1) && is_constant_expression(op2)) {
2171 var = op1->reference.entity;
2173 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2174 cmp_val = get_inversed_pnc(cmp_val);
2175 var = op2->reference.entity;
2180 type_t *const type = skip_typeref(var->declaration.type);
2181 ir_mode *const mode = get_ir_mode_storage(type);
2183 res = get_value(var->variable.v.value_number, mode);
2184 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2185 set_value(var->variable.v.value_number, res);
2191 * Handle the assume optimizer hint.
2193 * @param dbi debug info
2194 * @param expr the IL assume expression
2196 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression)
2198 switch(expression->kind) {
2199 case EXPR_BINARY_EQUAL:
2200 case EXPR_BINARY_NOTEQUAL:
2201 case EXPR_BINARY_LESS:
2202 case EXPR_BINARY_LESSEQUAL:
2203 case EXPR_BINARY_GREATER:
2204 case EXPR_BINARY_GREATEREQUAL:
2205 return handle_assume_compare(dbi, &expression->binary);
2211 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2213 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2214 type_t *type = skip_typeref(expression->base.type);
2216 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2217 return expression_to_addr(expression->value);
2219 const expression_t *value = expression->value;
2221 switch(expression->base.kind) {
2222 case EXPR_UNARY_NEGATE: {
2223 ir_node *value_node = expression_to_firm(value);
2224 ir_mode *mode = get_ir_mode_arithmetic(type);
2225 return new_d_Minus(dbgi, value_node, mode);
2227 case EXPR_UNARY_PLUS:
2228 return expression_to_firm(value);
2229 case EXPR_UNARY_BITWISE_NEGATE: {
2230 ir_node *value_node = expression_to_firm(value);
2231 ir_mode *mode = get_ir_mode_arithmetic(type);
2232 return new_d_Not(dbgi, value_node, mode);
2234 case EXPR_UNARY_NOT: {
2235 ir_node *value_node = _expression_to_firm(value);
2236 value_node = create_conv(dbgi, value_node, mode_b);
2237 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2240 case EXPR_UNARY_DEREFERENCE: {
2241 ir_node *value_node = expression_to_firm(value);
2242 type_t *value_type = skip_typeref(value->base.type);
2243 assert(is_type_pointer(value_type));
2244 type_t *points_to = value_type->pointer.points_to;
2245 return deref_address(dbgi, points_to, value_node);
2247 case EXPR_UNARY_POSTFIX_INCREMENT:
2248 case EXPR_UNARY_POSTFIX_DECREMENT:
2249 case EXPR_UNARY_PREFIX_INCREMENT:
2250 case EXPR_UNARY_PREFIX_DECREMENT:
2251 return create_incdec(expression);
2252 case EXPR_UNARY_CAST: {
2253 ir_node *value_node = expression_to_firm(value);
2254 if (is_type_scalar(type)) {
2255 ir_mode *mode = get_ir_mode_storage(type);
2256 ir_node *node = create_conv(dbgi, value_node, mode);
2257 node = do_strict_conv(dbgi, node);
2258 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2259 node = create_conv(dbgi, node, mode_arith);
2262 /* make sure firm type is constructed */
2263 (void) get_ir_type(type);
2267 case EXPR_UNARY_CAST_IMPLICIT: {
2268 ir_node *value_node = expression_to_firm(value);
2269 if (is_type_scalar(type)) {
2270 ir_mode *mode = get_ir_mode_storage(type);
2271 ir_node *res = create_conv(dbgi, value_node, mode);
2272 ir_mode *mode_arith = get_ir_mode_arithmetic(type);
2273 res = create_conv(dbgi, res, mode_arith);
2279 case EXPR_UNARY_ASSUME:
2280 if (firm_opt.confirm)
2281 return handle_assume(dbgi, value);
2288 panic("invalid UNEXPR type found");
2292 * produces a 0/1 depending of the value of a mode_b node
2294 static ir_node *produce_condition_result(const expression_t *expression,
2295 ir_mode *mode, dbg_info *dbgi)
2297 ir_node *cur_block = get_cur_block();
2299 ir_node *one_block = new_immBlock();
2300 set_cur_block(one_block);
2301 ir_node *one = new_Const(get_mode_one(mode));
2302 ir_node *jmp_one = new_d_Jmp(dbgi);
2304 ir_node *zero_block = new_immBlock();
2305 set_cur_block(zero_block);
2306 ir_node *zero = new_Const(get_mode_null(mode));
2307 ir_node *jmp_zero = new_d_Jmp(dbgi);
2309 set_cur_block(cur_block);
2310 create_condition_evaluation(expression, one_block, zero_block);
2311 mature_immBlock(one_block);
2312 mature_immBlock(zero_block);
2314 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2315 new_Block(2, in_cf);
2317 ir_node *in[2] = { one, zero };
2318 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2323 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2324 ir_node *value, type_t *type)
2326 ir_mode *const mode = get_ir_mode_arithmetic(type_ptrdiff_t);
2327 assert(is_type_pointer(type));
2328 pointer_type_t *const pointer_type = &type->pointer;
2329 type_t *const points_to = skip_typeref(pointer_type->points_to);
2330 unsigned elem_size = get_type_size_const(points_to);
2332 value = create_conv(dbgi, value, mode);
2334 /* gcc extension: allow arithmetic with void * and function * */
2335 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2336 is_type_function(points_to)) {
2340 assert(elem_size >= 1);
2344 ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2345 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode);
2349 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2350 ir_node *left, ir_node *right)
2353 type_t *type_left = skip_typeref(expression->left->base.type);
2354 type_t *type_right = skip_typeref(expression->right->base.type);
2356 expression_kind_t kind = expression->base.kind;
2359 case EXPR_BINARY_SHIFTLEFT:
2360 case EXPR_BINARY_SHIFTRIGHT:
2361 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2362 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2363 mode = get_irn_mode(left);
2364 right = create_conv(dbgi, right, mode_uint);
2367 case EXPR_BINARY_SUB:
2368 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2369 const pointer_type_t *const ptr_type = &type_left->pointer;
2371 mode = get_ir_mode_arithmetic(expression->base.type);
2372 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2373 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2374 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2375 ir_node *const no_mem = new_NoMem();
2376 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2377 mode, op_pin_state_floats);
2378 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2381 case EXPR_BINARY_SUB_ASSIGN:
2382 if (is_type_pointer(type_left)) {
2383 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2384 mode = get_ir_mode_arithmetic(type_left);
2389 case EXPR_BINARY_ADD:
2390 case EXPR_BINARY_ADD_ASSIGN:
2391 if (is_type_pointer(type_left)) {
2392 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2393 mode = get_ir_mode_arithmetic(type_left);
2395 } else if (is_type_pointer(type_right)) {
2396 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2397 mode = get_ir_mode_arithmetic(type_right);
2404 mode = get_ir_mode_arithmetic(type_right);
2405 left = create_conv(dbgi, left, mode);
2410 case EXPR_BINARY_ADD_ASSIGN:
2411 case EXPR_BINARY_ADD:
2412 return new_d_Add(dbgi, left, right, mode);
2413 case EXPR_BINARY_SUB_ASSIGN:
2414 case EXPR_BINARY_SUB:
2415 return new_d_Sub(dbgi, left, right, mode);
2416 case EXPR_BINARY_MUL_ASSIGN:
2417 case EXPR_BINARY_MUL:
2418 return new_d_Mul(dbgi, left, right, mode);
2419 case EXPR_BINARY_BITWISE_AND:
2420 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2421 return new_d_And(dbgi, left, right, mode);
2422 case EXPR_BINARY_BITWISE_OR:
2423 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2424 return new_d_Or(dbgi, left, right, mode);
2425 case EXPR_BINARY_BITWISE_XOR:
2426 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2427 return new_d_Eor(dbgi, left, right, mode);
2428 case EXPR_BINARY_SHIFTLEFT:
2429 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2430 return new_d_Shl(dbgi, left, right, mode);
2431 case EXPR_BINARY_SHIFTRIGHT:
2432 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2433 if (mode_is_signed(mode)) {
2434 return new_d_Shrs(dbgi, left, right, mode);
2436 return new_d_Shr(dbgi, left, right, mode);
2438 case EXPR_BINARY_DIV:
2439 case EXPR_BINARY_DIV_ASSIGN: {
2440 ir_node *pin = new_Pin(new_NoMem());
2443 if (mode_is_float(mode)) {
2444 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2445 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2447 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2448 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2452 case EXPR_BINARY_MOD:
2453 case EXPR_BINARY_MOD_ASSIGN: {
2454 ir_node *pin = new_Pin(new_NoMem());
2455 assert(!mode_is_float(mode));
2456 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2457 op_pin_state_floats);
2458 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2462 panic("unexpected expression kind");
2466 static ir_node *create_lazy_op(const binary_expression_t *expression)
2468 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2469 type_t *type = skip_typeref(expression->base.type);
2470 ir_mode *mode = get_ir_mode_arithmetic(type);
2472 if (is_constant_expression(expression->left)) {
2473 long val = fold_constant(expression->left);
2474 expression_kind_t ekind = expression->base.kind;
2475 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2476 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2478 return new_Const(get_mode_null(mode));
2482 return new_Const(get_mode_one(mode));
2486 if (is_constant_expression(expression->right)) {
2487 long const valr = fold_constant(expression->right);
2489 new_Const(get_mode_one(mode)) :
2490 new_Const(get_mode_null(mode));
2493 return produce_condition_result(expression->right, mode, dbgi);
2496 return produce_condition_result((const expression_t*) expression, mode,
2500 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2501 ir_node *right, ir_mode *mode);
2503 static ir_node *create_assign_binop(const binary_expression_t *expression)
2505 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2506 const expression_t *left_expr = expression->left;
2507 type_t *type = skip_typeref(left_expr->base.type);
2508 ir_mode *left_mode = get_ir_mode_storage(type);
2509 ir_node *right = expression_to_firm(expression->right);
2510 ir_node *left_addr = expression_to_addr(left_expr);
2511 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2512 ir_node *result = create_op(dbgi, expression, left, right);
2514 result = create_conv(dbgi, result, left_mode);
2515 result = do_strict_conv(dbgi, result);
2517 result = set_value_for_expression_addr(left_expr, result, left_addr);
2519 if (!is_type_compound(type)) {
2520 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2521 result = create_conv(dbgi, result, mode_arithmetic);
2526 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2528 expression_kind_t kind = expression->base.kind;
2531 case EXPR_BINARY_EQUAL:
2532 case EXPR_BINARY_NOTEQUAL:
2533 case EXPR_BINARY_LESS:
2534 case EXPR_BINARY_LESSEQUAL:
2535 case EXPR_BINARY_GREATER:
2536 case EXPR_BINARY_GREATEREQUAL:
2537 case EXPR_BINARY_ISGREATER:
2538 case EXPR_BINARY_ISGREATEREQUAL:
2539 case EXPR_BINARY_ISLESS:
2540 case EXPR_BINARY_ISLESSEQUAL:
2541 case EXPR_BINARY_ISLESSGREATER:
2542 case EXPR_BINARY_ISUNORDERED: {
2543 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2544 ir_node *left = expression_to_firm(expression->left);
2545 ir_node *right = expression_to_firm(expression->right);
2546 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2547 long pnc = get_pnc(kind, expression->left->base.type);
2548 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2551 case EXPR_BINARY_ASSIGN: {
2552 ir_node *addr = expression_to_addr(expression->left);
2553 ir_node *right = expression_to_firm(expression->right);
2555 = set_value_for_expression_addr(expression->left, right, addr);
2557 type_t *type = skip_typeref(expression->base.type);
2558 if (!is_type_compound(type)) {
2559 ir_mode *mode_arithmetic = get_ir_mode_arithmetic(type);
2560 res = create_conv(NULL, res, mode_arithmetic);
2564 case EXPR_BINARY_ADD:
2565 case EXPR_BINARY_SUB:
2566 case EXPR_BINARY_MUL:
2567 case EXPR_BINARY_DIV:
2568 case EXPR_BINARY_MOD:
2569 case EXPR_BINARY_BITWISE_AND:
2570 case EXPR_BINARY_BITWISE_OR:
2571 case EXPR_BINARY_BITWISE_XOR:
2572 case EXPR_BINARY_SHIFTLEFT:
2573 case EXPR_BINARY_SHIFTRIGHT:
2575 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2576 ir_node *left = expression_to_firm(expression->left);
2577 ir_node *right = expression_to_firm(expression->right);
2578 return create_op(dbgi, expression, left, right);
2580 case EXPR_BINARY_LOGICAL_AND:
2581 case EXPR_BINARY_LOGICAL_OR:
2582 return create_lazy_op(expression);
2583 case EXPR_BINARY_COMMA:
2584 /* create side effects of left side */
2585 (void) expression_to_firm(expression->left);
2586 return _expression_to_firm(expression->right);
2588 case EXPR_BINARY_ADD_ASSIGN:
2589 case EXPR_BINARY_SUB_ASSIGN:
2590 case EXPR_BINARY_MUL_ASSIGN:
2591 case EXPR_BINARY_MOD_ASSIGN:
2592 case EXPR_BINARY_DIV_ASSIGN:
2593 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2594 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2595 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2596 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2597 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2598 return create_assign_binop(expression);
2600 panic("TODO binexpr type");
2604 static ir_node *array_access_addr(const array_access_expression_t *expression)
2606 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2607 ir_node *base_addr = expression_to_firm(expression->array_ref);
2608 ir_node *offset = expression_to_firm(expression->index);
2609 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2610 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2611 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2616 static ir_node *array_access_to_firm(
2617 const array_access_expression_t *expression)
2619 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2620 ir_node *addr = array_access_addr(expression);
2621 type_t *type = revert_automatic_type_conversion(
2622 (const expression_t*) expression);
2623 type = skip_typeref(type);
2625 return deref_address(dbgi, type, addr);
2628 static long get_offsetof_offset(const offsetof_expression_t *expression)
2630 type_t *orig_type = expression->type;
2633 designator_t *designator = expression->designator;
2634 for ( ; designator != NULL; designator = designator->next) {
2635 type_t *type = skip_typeref(orig_type);
2636 /* be sure the type is constructed */
2637 (void) get_ir_type(type);
2639 if (designator->symbol != NULL) {
2640 assert(is_type_compound(type));
2641 symbol_t *symbol = designator->symbol;
2643 compound_t *compound = type->compound.compound;
2644 entity_t *iter = compound->members.entities;
2645 for ( ; iter != NULL; iter = iter->base.next) {
2646 if (iter->base.symbol == symbol) {
2650 assert(iter != NULL);
2652 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2653 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2654 offset += get_entity_offset(iter->compound_member.entity);
2656 orig_type = iter->declaration.type;
2658 expression_t *array_index = designator->array_index;
2659 assert(designator->array_index != NULL);
2660 assert(is_type_array(type));
2662 long index = fold_constant(array_index);
2663 ir_type *arr_type = get_ir_type(type);
2664 ir_type *elem_type = get_array_element_type(arr_type);
2665 long elem_size = get_type_size_bytes(elem_type);
2667 offset += index * elem_size;
2669 orig_type = type->array.element_type;
2676 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2678 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
2679 long offset = get_offsetof_offset(expression);
2680 tarval *tv = new_tarval_from_long(offset, mode);
2681 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2683 return new_d_Const(dbgi, tv);
2686 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2687 ir_entity *entity, type_t *type);
2689 static ir_node *compound_literal_to_firm(
2690 const compound_literal_expression_t *expression)
2692 type_t *type = expression->type;
2694 /* create an entity on the stack */
2695 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2697 ident *const id = id_unique("CompLit.%u");
2698 ir_type *const irtype = get_ir_type(type);
2699 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2700 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2701 set_entity_ld_ident(entity, id);
2703 set_entity_variability(entity, variability_uninitialized);
2705 /* create initialisation code */
2706 initializer_t *initializer = expression->initializer;
2707 create_local_initializer(initializer, dbgi, entity, type);
2709 /* create a sel for the compound literal address */
2710 ir_node *frame = get_local_frame(entity);
2711 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2716 * Transform a sizeof expression into Firm code.
2718 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2720 type_t *type = expression->type;
2722 type = expression->tp_expression->base.type;
2723 assert(type != NULL);
2726 type = skip_typeref(type);
2727 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2728 if (is_type_array(type) && type->array.is_vla
2729 && expression->tp_expression != NULL) {
2730 expression_to_firm(expression->tp_expression);
2733 return get_type_size(type);
2736 static entity_t *get_expression_entity(const expression_t *expression)
2738 if (expression->kind != EXPR_REFERENCE)
2741 return expression->reference.entity;
2745 * Transform an alignof expression into Firm code.
2747 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2749 ir_entity *irentity = NULL;
2751 const expression_t *tp_expression = expression->tp_expression;
2752 if (tp_expression != NULL) {
2753 entity_t *entity = get_expression_entity(tp_expression);
2754 if (entity != NULL && is_declaration(entity)) {
2755 switch (entity->declaration.kind) {
2756 case DECLARATION_KIND_UNKNOWN:
2757 panic("unknown entity reference found");
2758 case DECLARATION_KIND_COMPOUND_MEMBER:
2759 irentity = entity->compound_member.entity;
2761 case DECLARATION_KIND_GLOBAL_VARIABLE:
2762 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
2763 irentity = entity->variable.v.entity;
2765 case DECLARATION_KIND_PARAMETER_ENTITY:
2766 irentity = entity->parameter.v.entity;
2768 case DECLARATION_KIND_FUNCTION:
2769 case DECLARATION_KIND_INNER_FUNCTION:
2770 irentity = entity->function.entity;
2772 case DECLARATION_KIND_PARAMETER:
2773 case DECLARATION_KIND_LOCAL_VARIABLE:
2774 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
2781 if (irentity != NULL) {
2782 irtype = get_entity_type(irentity);
2784 type_t *type = expression->type;
2785 irtype = get_ir_type(type);
2788 ir_mode *const mode = get_ir_mode_arithmetic(expression->base.type);
2789 symconst_symbol sym;
2790 sym.type_p = irtype;
2791 return new_SymConst(mode, sym, symconst_type_align);
2794 static void init_ir_types(void);
2796 long fold_constant(const expression_t *expression)
2798 assert(is_type_valid(skip_typeref(expression->base.type)));
2800 bool constant_folding_old = constant_folding;
2801 constant_folding = true;
2805 assert(is_constant_expression(expression));
2807 ir_graph *old_current_ir_graph = current_ir_graph;
2808 current_ir_graph = get_const_code_irg();
2810 ir_node *cnst = expression_to_firm(expression);
2811 current_ir_graph = old_current_ir_graph;
2813 if (!is_Const(cnst)) {
2814 panic("couldn't fold constant");
2817 tarval *tv = get_Const_tarval(cnst);
2818 if (!tarval_is_long(tv)) {
2819 panic("result of constant folding is not integer");
2822 constant_folding = constant_folding_old;
2824 return get_tarval_long(tv);
2827 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2829 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2831 /* first try to fold a constant condition */
2832 if (is_constant_expression(expression->condition)) {
2833 long val = fold_constant(expression->condition);
2835 expression_t *true_expression = expression->true_expression;
2836 if (true_expression == NULL)
2837 true_expression = expression->condition;
2838 return expression_to_firm(true_expression);
2840 return expression_to_firm(expression->false_expression);
2844 ir_node *cur_block = get_cur_block();
2846 /* create the true block */
2847 ir_node *true_block = new_immBlock();
2848 set_cur_block(true_block);
2850 ir_node *true_val = expression->true_expression != NULL ?
2851 expression_to_firm(expression->true_expression) : NULL;
2852 ir_node *true_jmp = new_Jmp();
2854 /* create the false block */
2855 ir_node *false_block = new_immBlock();
2856 set_cur_block(false_block);
2858 ir_node *false_val = expression_to_firm(expression->false_expression);
2859 ir_node *false_jmp = new_Jmp();
2861 /* create the condition evaluation */
2862 set_cur_block(cur_block);
2863 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2864 if (expression->true_expression == NULL) {
2865 if (cond_expr != NULL) {
2866 true_val = cond_expr;
2868 /* Condition ended with a short circuit (&&, ||, !) operation.
2869 * Generate a "1" as value for the true branch. */
2870 true_val = new_Const(get_mode_one(mode_Is));
2873 mature_immBlock(true_block);
2874 mature_immBlock(false_block);
2876 /* create the common block */
2877 ir_node *in_cf[2] = { true_jmp, false_jmp };
2878 new_Block(2, in_cf);
2880 /* TODO improve static semantics, so either both or no values are NULL */
2881 if (true_val == NULL || false_val == NULL)
2884 ir_node *in[2] = { true_val, false_val };
2885 ir_mode *mode = get_irn_mode(true_val);
2886 assert(get_irn_mode(false_val) == mode);
2887 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2893 * Returns an IR-node representing the address of a field.
2895 static ir_node *select_addr(const select_expression_t *expression)
2897 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2899 construct_select_compound(expression);
2901 ir_node *compound_addr = expression_to_firm(expression->compound);
2903 entity_t *entry = expression->compound_entry;
2904 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2905 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2907 if (constant_folding) {
2908 ir_mode *mode = get_irn_mode(compound_addr);
2909 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2910 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2911 return new_d_Add(dbgi, compound_addr, ofs, mode);
2913 ir_entity *irentity = entry->compound_member.entity;
2914 assert(irentity != NULL);
2915 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2919 static ir_node *select_to_firm(const select_expression_t *expression)
2921 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2922 ir_node *addr = select_addr(expression);
2923 type_t *type = revert_automatic_type_conversion(
2924 (const expression_t*) expression);
2925 type = skip_typeref(type);
2927 entity_t *entry = expression->compound_entry;
2928 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2929 type_t *entry_type = skip_typeref(entry->declaration.type);
2931 if (entry_type->kind == TYPE_BITFIELD) {
2932 return bitfield_extract_to_firm(expression, addr);
2935 return deref_address(dbgi, type, addr);
2938 /* Values returned by __builtin_classify_type. */
2939 typedef enum gcc_type_class
2945 enumeral_type_class,
2948 reference_type_class,
2952 function_type_class,
2963 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2965 type_t *type = expr->type_expression->base.type;
2967 /* FIXME gcc returns different values depending on whether compiling C or C++
2968 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2971 type = skip_typeref(type);
2972 switch (type->kind) {
2974 const atomic_type_t *const atomic_type = &type->atomic;
2975 switch (atomic_type->akind) {
2976 /* should not be reached */
2977 case ATOMIC_TYPE_INVALID:
2981 /* gcc cannot do that */
2982 case ATOMIC_TYPE_VOID:
2983 tc = void_type_class;
2986 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2987 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2988 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2989 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2990 case ATOMIC_TYPE_SHORT:
2991 case ATOMIC_TYPE_USHORT:
2992 case ATOMIC_TYPE_INT:
2993 case ATOMIC_TYPE_UINT:
2994 case ATOMIC_TYPE_LONG:
2995 case ATOMIC_TYPE_ULONG:
2996 case ATOMIC_TYPE_LONGLONG:
2997 case ATOMIC_TYPE_ULONGLONG:
2998 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2999 tc = integer_type_class;
3002 case ATOMIC_TYPE_FLOAT:
3003 case ATOMIC_TYPE_DOUBLE:
3004 case ATOMIC_TYPE_LONG_DOUBLE:
3005 tc = real_type_class;
3008 panic("Unexpected atomic type in classify_type_to_firm().");
3011 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
3012 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
3013 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
3014 case TYPE_ARRAY: /* gcc handles this as pointer */
3015 case TYPE_FUNCTION: /* gcc handles this as pointer */
3016 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
3017 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
3018 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
3020 /* gcc handles this as integer */
3021 case TYPE_ENUM: tc = integer_type_class; goto make_const;
3023 /* gcc classifies the referenced type */
3024 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
3027 /* typedef/typeof should be skipped already */
3034 panic("unexpected TYPE classify_type_to_firm().");
3038 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3039 tarval *const tv = new_tarval_from_long(tc, mode_int);
3040 return new_d_Const(dbgi, tv);
3043 static ir_node *function_name_to_firm(
3044 const funcname_expression_t *const expr)
3046 switch(expr->kind) {
3047 case FUNCNAME_FUNCTION:
3048 case FUNCNAME_PRETTY_FUNCTION:
3049 case FUNCNAME_FUNCDNAME:
3050 if (current_function_name == NULL) {
3051 const source_position_t *const src_pos = &expr->base.source_position;
3052 const char *name = current_function_entity->base.symbol->string;
3053 const string_t string = { name, strlen(name) + 1 };
3054 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
3056 return current_function_name;
3057 case FUNCNAME_FUNCSIG:
3058 if (current_funcsig == NULL) {
3059 const source_position_t *const src_pos = &expr->base.source_position;
3060 ir_entity *ent = get_irg_entity(current_ir_graph);
3061 const char *const name = get_entity_ld_name(ent);
3062 const string_t string = { name, strlen(name) + 1 };
3063 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
3065 return current_funcsig;
3067 panic("Unsupported function name");
3070 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
3072 statement_t *statement = expr->statement;
3074 assert(statement->kind == STATEMENT_COMPOUND);
3075 return compound_statement_to_firm(&statement->compound);
3078 static ir_node *va_start_expression_to_firm(
3079 const va_start_expression_t *const expr)
3081 type_t *const type = current_function_entity->declaration.type;
3082 ir_type *const method_type = get_ir_type(type);
3083 int const n = get_method_n_params(method_type) - 1;
3084 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
3085 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
3086 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3087 ir_node *const no_mem = new_NoMem();
3088 ir_node *const arg_sel =
3089 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
3091 ir_node *const cnst = get_type_size(expr->parameter->base.type);
3092 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
3093 set_value_for_expression(expr->ap, add);
3098 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
3100 type_t *const type = expr->base.type;
3101 expression_t *const ap_expr = expr->ap;
3102 ir_node *const ap_addr = expression_to_addr(ap_expr);
3103 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
3104 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
3105 ir_node *const res = deref_address(dbgi, type, ap);
3107 ir_node *const cnst = get_type_size(expr->base.type);
3108 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
3110 set_value_for_expression_addr(ap_expr, add, ap_addr);
3115 static ir_node *dereference_addr(const unary_expression_t *const expression)
3117 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3118 return expression_to_firm(expression->value);
3122 * Returns a IR-node representing an lvalue of the given expression.
3124 static ir_node *expression_to_addr(const expression_t *expression)
3126 switch(expression->kind) {
3127 case EXPR_ARRAY_ACCESS:
3128 return array_access_addr(&expression->array_access);
3130 return call_expression_to_firm(&expression->call);
3131 case EXPR_COMPOUND_LITERAL:
3132 return compound_literal_to_firm(&expression->compound_literal);
3133 case EXPR_REFERENCE:
3134 return reference_addr(&expression->reference);
3136 return select_addr(&expression->select);
3137 case EXPR_UNARY_DEREFERENCE:
3138 return dereference_addr(&expression->unary);
3142 panic("trying to get address of non-lvalue");
3145 static ir_node *builtin_constant_to_firm(
3146 const builtin_constant_expression_t *expression)
3148 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3151 if (is_constant_expression(expression->value)) {
3156 return new_Const_long(mode, v);
3159 static ir_node *builtin_prefetch_to_firm(
3160 const builtin_prefetch_expression_t *expression)
3162 ir_node *adr = expression_to_firm(expression->adr);
3163 /* no Firm support for prefetch yet */
3168 static ir_node *get_label_block(label_t *label)
3170 if (label->block != NULL)
3171 return label->block;
3173 /* beware: might be called from create initializer with current_ir_graph
3174 * set to const_code_irg. */
3175 ir_graph *rem = current_ir_graph;
3176 current_ir_graph = current_function;
3178 ir_node *block = new_immBlock();
3180 label->block = block;
3182 ARR_APP1(label_t *, all_labels, label);
3184 current_ir_graph = rem;
3189 * Pointer to a label. This is used for the
3190 * GNU address-of-label extension.
3192 static ir_node *label_address_to_firm(
3193 const label_address_expression_t *label)
3195 ir_node *block = get_label_block(label->label);
3196 ir_label_t nr = get_Block_label(block);
3199 nr = get_irp_next_label_nr();
3200 set_Block_label(block, nr);
3202 symconst_symbol value;
3204 return new_SymConst(mode_P_code, value, symconst_label);
3207 static ir_node *builtin_symbol_to_firm(
3208 const builtin_symbol_expression_t *expression)
3210 /* for gcc compatibility we have to produce (dummy) addresses for some
3212 if (warning.other) {
3213 warningf(&expression->base.source_position,
3214 "taking address of builtin '%Y'", expression->symbol);
3217 /* simply create a NULL pointer */
3218 ir_mode *mode = get_ir_mode_arithmetic(type_void_ptr);
3219 ir_node *res = new_Const_long(mode, 0);
3225 * creates firm nodes for an expression. The difference between this function
3226 * and expression_to_firm is, that this version might produce mode_b nodes
3227 * instead of mode_Is.
3229 static ir_node *_expression_to_firm(const expression_t *expression)
3232 if (!constant_folding) {
3233 assert(!expression->base.transformed);
3234 ((expression_t*) expression)->base.transformed = true;
3238 switch (expression->kind) {
3239 case EXPR_CHARACTER_CONSTANT:
3240 return character_constant_to_firm(&expression->conste);
3241 case EXPR_WIDE_CHARACTER_CONSTANT:
3242 return wide_character_constant_to_firm(&expression->conste);
3244 return const_to_firm(&expression->conste);
3245 case EXPR_STRING_LITERAL:
3246 return string_literal_to_firm(&expression->string);
3247 case EXPR_WIDE_STRING_LITERAL:
3248 return wide_string_literal_to_firm(&expression->wide_string);
3249 case EXPR_REFERENCE:
3250 return reference_expression_to_firm(&expression->reference);
3251 case EXPR_REFERENCE_ENUM_VALUE:
3252 return reference_expression_enum_value_to_firm(&expression->reference);
3254 return call_expression_to_firm(&expression->call);
3256 return unary_expression_to_firm(&expression->unary);
3258 return binary_expression_to_firm(&expression->binary);
3259 case EXPR_ARRAY_ACCESS:
3260 return array_access_to_firm(&expression->array_access);
3262 return sizeof_to_firm(&expression->typeprop);
3264 return alignof_to_firm(&expression->typeprop);
3265 case EXPR_CONDITIONAL:
3266 return conditional_to_firm(&expression->conditional);
3268 return select_to_firm(&expression->select);
3269 case EXPR_CLASSIFY_TYPE:
3270 return classify_type_to_firm(&expression->classify_type);
3272 return function_name_to_firm(&expression->funcname);
3273 case EXPR_STATEMENT:
3274 return statement_expression_to_firm(&expression->statement);
3276 return va_start_expression_to_firm(&expression->va_starte);
3278 return va_arg_expression_to_firm(&expression->va_arge);
3279 case EXPR_BUILTIN_SYMBOL:
3280 return builtin_symbol_to_firm(&expression->builtin_symbol);
3281 case EXPR_BUILTIN_CONSTANT_P:
3282 return builtin_constant_to_firm(&expression->builtin_constant);
3283 case EXPR_BUILTIN_PREFETCH:
3284 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3286 return offsetof_to_firm(&expression->offsetofe);
3287 case EXPR_COMPOUND_LITERAL:
3288 return compound_literal_to_firm(&expression->compound_literal);
3289 case EXPR_LABEL_ADDRESS:
3290 return label_address_to_firm(&expression->label_address);
3296 panic("invalid expression found");
3299 static bool is_builtin_expect(const expression_t *expression)
3301 if (expression->kind != EXPR_CALL)
3304 expression_t *function = expression->call.function;
3305 if (function->kind != EXPR_BUILTIN_SYMBOL)
3307 if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3313 static bool produces_mode_b(const expression_t *expression)
3315 switch (expression->kind) {
3316 case EXPR_BINARY_EQUAL:
3317 case EXPR_BINARY_NOTEQUAL:
3318 case EXPR_BINARY_LESS:
3319 case EXPR_BINARY_LESSEQUAL:
3320 case EXPR_BINARY_GREATER:
3321 case EXPR_BINARY_GREATEREQUAL:
3322 case EXPR_BINARY_ISGREATER:
3323 case EXPR_BINARY_ISGREATEREQUAL:
3324 case EXPR_BINARY_ISLESS:
3325 case EXPR_BINARY_ISLESSEQUAL:
3326 case EXPR_BINARY_ISLESSGREATER:
3327 case EXPR_BINARY_ISUNORDERED:
3328 case EXPR_UNARY_NOT:
3332 if (is_builtin_expect(expression)) {
3333 expression_t *argument = expression->call.arguments->expression;
3334 return produces_mode_b(argument);
3337 case EXPR_BINARY_COMMA:
3338 return produces_mode_b(expression->binary.right);
3345 static ir_node *expression_to_firm(const expression_t *expression)
3347 if (!produces_mode_b(expression)) {
3348 ir_node *res = _expression_to_firm(expression);
3349 assert(res == NULL || get_irn_mode(res) != mode_b);
3353 if (is_constant_expression(expression)) {
3354 ir_node *res = _expression_to_firm(expression);
3355 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3356 assert(is_Const(res));
3357 if (is_Const_null(res)) {
3358 return new_Const_long(mode, 0);
3360 return new_Const_long(mode, 1);
3364 /* we have to produce a 0/1 from the mode_b expression */
3365 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3366 ir_mode *mode = get_ir_mode_arithmetic(expression->base.type);
3367 return produce_condition_result(expression, mode, dbgi);
3371 * create a short-circuit expression evaluation that tries to construct
3372 * efficient control flow structures for &&, || and ! expressions
3374 static ir_node *create_condition_evaluation(const expression_t *expression,
3375 ir_node *true_block,
3376 ir_node *false_block)
3378 switch(expression->kind) {
3379 case EXPR_UNARY_NOT: {
3380 const unary_expression_t *unary_expression = &expression->unary;
3381 create_condition_evaluation(unary_expression->value, false_block,
3385 case EXPR_BINARY_LOGICAL_AND: {
3386 const binary_expression_t *binary_expression = &expression->binary;
3388 ir_node *extra_block = new_immBlock();
3389 create_condition_evaluation(binary_expression->left, extra_block,
3391 mature_immBlock(extra_block);
3392 set_cur_block(extra_block);
3393 create_condition_evaluation(binary_expression->right, true_block,
3397 case EXPR_BINARY_LOGICAL_OR: {
3398 const binary_expression_t *binary_expression = &expression->binary;
3400 ir_node *extra_block = new_immBlock();
3401 create_condition_evaluation(binary_expression->left, true_block,
3403 mature_immBlock(extra_block);
3404 set_cur_block(extra_block);
3405 create_condition_evaluation(binary_expression->right, true_block,
3413 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3414 ir_node *cond_expr = _expression_to_firm(expression);
3415 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3416 ir_node *cond = new_d_Cond(dbgi, condition);
3417 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3418 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3420 /* set branch prediction info based on __builtin_expect */
3421 if (is_builtin_expect(expression) && is_Cond(cond)) {
3422 call_argument_t *argument = expression->call.arguments->next;
3423 if (is_constant_expression(argument->expression)) {
3424 long cnst = fold_constant(argument->expression);
3425 cond_jmp_predicate pred;
3428 pred = COND_JMP_PRED_FALSE;
3430 pred = COND_JMP_PRED_TRUE;
3432 set_Cond_jmp_pred(cond, pred);
3436 add_immBlock_pred(true_block, true_proj);
3437 add_immBlock_pred(false_block, false_proj);
3439 set_cur_block(NULL);
3444 static void create_variable_entity(entity_t *variable,
3445 declaration_kind_t declaration_kind,
3446 ir_type *parent_type)
3448 assert(variable->kind == ENTITY_VARIABLE);
3449 type_t *type = skip_typeref(variable->declaration.type);
3450 type = get_aligned_type(type, variable->variable.alignment);
3452 ident *const id = new_id_from_str(variable->base.symbol->string);
3453 ir_type *const irtype = get_ir_type(type);
3454 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3456 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3458 handle_gnu_attributes_ent(irentity, variable);
3460 variable->declaration.kind = (unsigned char) declaration_kind;
3461 variable->variable.v.entity = irentity;
3462 set_entity_variability(irentity, variability_uninitialized);
3463 set_entity_ld_ident(irentity, create_ld_ident(variable));
3465 if (parent_type == get_tls_type())
3466 set_entity_allocation(irentity, allocation_automatic);
3467 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3468 set_entity_allocation(irentity, allocation_static);
3470 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3471 set_entity_volatility(irentity, volatility_is_volatile);
3476 typedef struct type_path_entry_t type_path_entry_t;
3477 struct type_path_entry_t {
3479 ir_initializer_t *initializer;
3481 entity_t *compound_entry;
3484 typedef struct type_path_t type_path_t;
3485 struct type_path_t {
3486 type_path_entry_t *path;
3491 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3493 size_t len = ARR_LEN(path->path);
3495 for (size_t i = 0; i < len; ++i) {
3496 const type_path_entry_t *entry = & path->path[i];
3498 type_t *type = skip_typeref(entry->type);
3499 if (is_type_compound(type)) {
3500 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3501 } else if (is_type_array(type)) {
3502 fprintf(stderr, "[%u]", (unsigned) entry->index);
3504 fprintf(stderr, "-INVALID-");
3507 fprintf(stderr, " (");
3508 print_type(path->top_type);
3509 fprintf(stderr, ")");
3512 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3514 size_t len = ARR_LEN(path->path);
3516 return & path->path[len-1];
3519 static type_path_entry_t *append_to_type_path(type_path_t *path)
3521 size_t len = ARR_LEN(path->path);
3522 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3524 type_path_entry_t *result = & path->path[len];
3525 memset(result, 0, sizeof(result[0]));
3529 static size_t get_compound_member_count(const compound_type_t *type)
3531 compound_t *compound = type->compound;
3532 size_t n_members = 0;
3533 entity_t *member = compound->members.entities;
3534 for ( ; member != NULL; member = member->base.next) {
3541 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3543 type_t *orig_top_type = path->top_type;
3544 type_t *top_type = skip_typeref(orig_top_type);
3546 assert(is_type_compound(top_type) || is_type_array(top_type));
3548 if (ARR_LEN(path->path) == 0) {
3551 type_path_entry_t *top = get_type_path_top(path);
3552 ir_initializer_t *initializer = top->initializer;
3553 return get_initializer_compound_value(initializer, top->index);
3557 static void descend_into_subtype(type_path_t *path)
3559 type_t *orig_top_type = path->top_type;
3560 type_t *top_type = skip_typeref(orig_top_type);
3562 assert(is_type_compound(top_type) || is_type_array(top_type));
3564 ir_initializer_t *initializer = get_initializer_entry(path);
3566 type_path_entry_t *top = append_to_type_path(path);
3567 top->type = top_type;
3571 if (is_type_compound(top_type)) {
3572 compound_t *compound = top_type->compound.compound;
3573 entity_t *entry = compound->members.entities;
3575 top->compound_entry = entry;
3577 len = get_compound_member_count(&top_type->compound);
3578 if (entry != NULL) {
3579 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3580 path->top_type = entry->declaration.type;
3583 assert(is_type_array(top_type));
3584 assert(top_type->array.size > 0);
3587 path->top_type = top_type->array.element_type;
3588 len = top_type->array.size;
3590 if (initializer == NULL
3591 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3592 initializer = create_initializer_compound(len);
3593 /* we have to set the entry at the 2nd latest path entry... */
3594 size_t path_len = ARR_LEN(path->path);
3595 assert(path_len >= 1);
3597 type_path_entry_t *entry = & path->path[path_len-2];
3598 ir_initializer_t *tinitializer = entry->initializer;
3599 set_initializer_compound_value(tinitializer, entry->index,
3603 top->initializer = initializer;
3606 static void ascend_from_subtype(type_path_t *path)
3608 type_path_entry_t *top = get_type_path_top(path);
3610 path->top_type = top->type;
3612 size_t len = ARR_LEN(path->path);
3613 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3616 static void walk_designator(type_path_t *path, const designator_t *designator)
3618 /* designators start at current object type */
3619 ARR_RESIZE(type_path_entry_t, path->path, 1);
3621 for ( ; designator != NULL; designator = designator->next) {
3622 type_path_entry_t *top = get_type_path_top(path);
3623 type_t *orig_type = top->type;
3624 type_t *type = skip_typeref(orig_type);
3626 if (designator->symbol != NULL) {
3627 assert(is_type_compound(type));
3629 symbol_t *symbol = designator->symbol;
3631 compound_t *compound = type->compound.compound;
3632 entity_t *iter = compound->members.entities;
3633 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3634 if (iter->base.symbol == symbol) {
3635 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3639 assert(iter != NULL);
3641 top->type = orig_type;
3642 top->compound_entry = iter;
3644 orig_type = iter->declaration.type;
3646 expression_t *array_index = designator->array_index;
3647 assert(designator->array_index != NULL);
3648 assert(is_type_array(type));
3650 long index = fold_constant(array_index);
3653 if (type->array.size_constant) {
3654 long array_size = type->array.size;
3655 assert(index < array_size);
3659 top->type = orig_type;
3660 top->index = (size_t) index;
3661 orig_type = type->array.element_type;
3663 path->top_type = orig_type;
3665 if (designator->next != NULL) {
3666 descend_into_subtype(path);
3670 path->invalid = false;
3673 static void advance_current_object(type_path_t *path)
3675 if (path->invalid) {
3676 /* TODO: handle this... */
3677 panic("invalid initializer in ast2firm (excessive elements)");
3680 type_path_entry_t *top = get_type_path_top(path);
3682 type_t *type = skip_typeref(top->type);
3683 if (is_type_union(type)) {
3684 top->compound_entry = NULL;
3685 } else if (is_type_struct(type)) {
3686 entity_t *entry = top->compound_entry;
3689 entry = entry->base.next;
3690 top->compound_entry = entry;
3691 if (entry != NULL) {
3692 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3693 path->top_type = entry->declaration.type;
3697 assert(is_type_array(type));
3700 if (!type->array.size_constant || top->index < type->array.size) {
3705 /* we're past the last member of the current sub-aggregate, try if we
3706 * can ascend in the type hierarchy and continue with another subobject */
3707 size_t len = ARR_LEN(path->path);
3710 ascend_from_subtype(path);
3711 advance_current_object(path);
3713 path->invalid = true;
3718 static ir_initializer_t *create_ir_initializer(
3719 const initializer_t *initializer, type_t *type);
3721 static ir_initializer_t *create_ir_initializer_value(
3722 const initializer_value_t *initializer)
3724 if (is_type_compound(initializer->value->base.type)) {
3725 panic("initializer creation for compounds not implemented yet");
3727 ir_node *value = expression_to_firm(initializer->value);
3728 type_t *type = initializer->value->base.type;
3729 ir_mode *mode = get_ir_mode_storage(type);
3730 value = create_conv(NULL, value, mode);
3731 return create_initializer_const(value);
3734 /** test wether type can be initialized by a string constant */
3735 static bool is_string_type(type_t *type)
3738 if (is_type_pointer(type)) {
3739 inner = skip_typeref(type->pointer.points_to);
3740 } else if(is_type_array(type)) {
3741 inner = skip_typeref(type->array.element_type);
3746 return is_type_integer(inner);
3749 static ir_initializer_t *create_ir_initializer_list(
3750 const initializer_list_t *initializer, type_t *type)
3753 memset(&path, 0, sizeof(path));
3754 path.top_type = type;
3755 path.path = NEW_ARR_F(type_path_entry_t, 0);
3757 descend_into_subtype(&path);
3759 for (size_t i = 0; i < initializer->len; ++i) {
3760 const initializer_t *sub_initializer = initializer->initializers[i];
3762 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3763 walk_designator(&path, sub_initializer->designator.designator);
3767 if (sub_initializer->kind == INITIALIZER_VALUE) {
3768 /* we might have to descend into types until we're at a scalar
3771 type_t *orig_top_type = path.top_type;
3772 type_t *top_type = skip_typeref(orig_top_type);
3774 if (is_type_scalar(top_type))
3776 descend_into_subtype(&path);
3778 } else if (sub_initializer->kind == INITIALIZER_STRING
3779 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3780 /* we might have to descend into types until we're at a scalar
3783 type_t *orig_top_type = path.top_type;
3784 type_t *top_type = skip_typeref(orig_top_type);
3786 if (is_string_type(top_type))
3788 descend_into_subtype(&path);
3792 ir_initializer_t *sub_irinitializer
3793 = create_ir_initializer(sub_initializer, path.top_type);
3795 size_t path_len = ARR_LEN(path.path);
3796 assert(path_len >= 1);
3797 type_path_entry_t *entry = & path.path[path_len-1];
3798 ir_initializer_t *tinitializer = entry->initializer;
3799 set_initializer_compound_value(tinitializer, entry->index,
3802 advance_current_object(&path);
3805 assert(ARR_LEN(path.path) >= 1);
3806 ir_initializer_t *result = path.path[0].initializer;
3807 DEL_ARR_F(path.path);
3812 static ir_initializer_t *create_ir_initializer_string(
3813 const initializer_string_t *initializer, type_t *type)
3815 type = skip_typeref(type);
3817 size_t string_len = initializer->string.size;
3818 assert(type->kind == TYPE_ARRAY);
3819 assert(type->array.size_constant);
3820 size_t len = type->array.size;
3821 ir_initializer_t *irinitializer = create_initializer_compound(len);
3823 const char *string = initializer->string.begin;
3824 ir_mode *mode = get_ir_mode_storage(type->array.element_type);
3826 for (size_t i = 0; i < len; ++i) {
3831 tarval *tv = new_tarval_from_long(c, mode);
3832 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3834 set_initializer_compound_value(irinitializer, i, char_initializer);
3837 return irinitializer;
3840 static ir_initializer_t *create_ir_initializer_wide_string(
3841 const initializer_wide_string_t *initializer, type_t *type)
3843 size_t string_len = initializer->string.size;
3844 assert(type->kind == TYPE_ARRAY);
3845 assert(type->array.size_constant);
3846 size_t len = type->array.size;
3847 ir_initializer_t *irinitializer = create_initializer_compound(len);
3849 const wchar_rep_t *string = initializer->string.begin;
3850 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3852 for (size_t i = 0; i < len; ++i) {
3854 if (i < string_len) {
3857 tarval *tv = new_tarval_from_long(c, mode);
3858 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3860 set_initializer_compound_value(irinitializer, i, char_initializer);
3863 return irinitializer;
3866 static ir_initializer_t *create_ir_initializer(
3867 const initializer_t *initializer, type_t *type)
3869 switch(initializer->kind) {
3870 case INITIALIZER_STRING:
3871 return create_ir_initializer_string(&initializer->string, type);
3873 case INITIALIZER_WIDE_STRING:
3874 return create_ir_initializer_wide_string(&initializer->wide_string,
3877 case INITIALIZER_LIST:
3878 return create_ir_initializer_list(&initializer->list, type);
3880 case INITIALIZER_VALUE:
3881 return create_ir_initializer_value(&initializer->value);
3883 case INITIALIZER_DESIGNATOR:
3884 panic("unexpected designator initializer found");
3886 panic("unknown initializer");
3889 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3892 if (is_atomic_type(type)) {
3893 ir_mode *mode = get_type_mode(type);
3894 tarval *zero = get_mode_null(mode);
3895 ir_node *cnst = new_d_Const(dbgi, zero);
3897 /* TODO: bitfields */
3898 ir_node *mem = get_store();
3899 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, 0);
3900 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3903 assert(is_compound_type(type));
3906 if (is_Array_type(type)) {
3907 assert(has_array_upper_bound(type, 0));
3908 n_members = get_array_upper_bound_int(type, 0);
3910 n_members = get_compound_n_members(type);
3913 for (int i = 0; i < n_members; ++i) {
3916 if (is_Array_type(type)) {
3917 ir_entity *entity = get_array_element_entity(type);
3918 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3919 ir_node *cnst = new_d_Const(dbgi, index_tv);
3920 ir_node *in[1] = { cnst };
3921 irtype = get_array_element_type(type);
3922 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3924 ir_entity *member = get_compound_member(type, i);
3926 irtype = get_entity_type(member);
3927 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3930 create_dynamic_null_initializer(irtype, dbgi, addr);
3935 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3936 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3938 switch(get_initializer_kind(initializer)) {
3939 case IR_INITIALIZER_NULL: {
3940 create_dynamic_null_initializer(type, dbgi, base_addr);
3943 case IR_INITIALIZER_CONST: {
3944 ir_node *node = get_initializer_const_value(initializer);
3945 ir_mode *mode = get_irn_mode(node);
3946 ir_type *ent_type = get_entity_type(entity);
3948 /* is it a bitfield type? */
3949 if (is_Primitive_type(ent_type) &&
3950 get_primitive_base_type(ent_type) != NULL) {
3951 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3955 assert(get_type_mode(type) == mode);
3956 ir_node *mem = get_store();
3957 ir_node *store = new_d_Store(dbgi, mem, base_addr, node, 0);
3958 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3962 case IR_INITIALIZER_TARVAL: {
3963 tarval *tv = get_initializer_tarval_value(initializer);
3964 ir_mode *mode = get_tarval_mode(tv);
3965 ir_node *cnst = new_d_Const(dbgi, tv);
3966 ir_type *ent_type = get_entity_type(entity);
3968 /* is it a bitfield type? */
3969 if (is_Primitive_type(ent_type) &&
3970 get_primitive_base_type(ent_type) != NULL) {
3971 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3975 assert(get_type_mode(type) == mode);
3976 ir_node *mem = get_store();
3977 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst, 0);
3978 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3982 case IR_INITIALIZER_COMPOUND: {
3983 assert(is_compound_type(type));
3985 if (is_Array_type(type)) {
3986 assert(has_array_upper_bound(type, 0));
3987 n_members = get_array_upper_bound_int(type, 0);
3989 n_members = get_compound_n_members(type);
3992 if (get_initializer_compound_n_entries(initializer)
3993 != (unsigned) n_members)
3994 panic("initializer doesn't match compound type");
3996 for (int i = 0; i < n_members; ++i) {
3999 ir_entity *sub_entity;
4000 if (is_Array_type(type)) {
4001 tarval *index_tv = new_tarval_from_long(i, mode_uint);
4002 ir_node *cnst = new_d_Const(dbgi, index_tv);
4003 ir_node *in[1] = { cnst };
4004 irtype = get_array_element_type(type);
4005 sub_entity = get_array_element_entity(type);
4006 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
4009 sub_entity = get_compound_member(type, i);
4010 irtype = get_entity_type(sub_entity);
4011 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
4015 ir_initializer_t *sub_init
4016 = get_initializer_compound_value(initializer, i);
4018 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
4025 panic("invalid IR_INITIALIZER found");
4028 static void create_dynamic_initializer(ir_initializer_t *initializer,
4029 dbg_info *dbgi, ir_entity *entity)
4031 ir_node *frame = get_local_frame(entity);
4032 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
4033 ir_type *type = get_entity_type(entity);
4035 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
4038 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
4039 ir_entity *entity, type_t *type)
4041 ir_node *memory = get_store();
4042 ir_node *nomem = new_NoMem();
4043 ir_node *frame = get_irg_frame(current_ir_graph);
4044 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
4046 if (initializer->kind == INITIALIZER_VALUE) {
4047 initializer_value_t *initializer_value = &initializer->value;
4049 ir_node *value = expression_to_firm(initializer_value->value);
4050 type = skip_typeref(type);
4051 assign_value(dbgi, addr, type, value);
4055 if (!is_constant_initializer(initializer)) {
4056 ir_initializer_t *irinitializer
4057 = create_ir_initializer(initializer, type);
4059 create_dynamic_initializer(irinitializer, dbgi, entity);
4063 /* create the ir_initializer */
4064 ir_graph *const old_current_ir_graph = current_ir_graph;
4065 current_ir_graph = get_const_code_irg();
4067 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
4069 assert(current_ir_graph == get_const_code_irg());
4070 current_ir_graph = old_current_ir_graph;
4072 /* create a "template" entity which is copied to the entity on the stack */
4073 ident *const id = id_unique("initializer.%u");
4074 ir_type *const irtype = get_ir_type(type);
4075 ir_type *const global_type = get_glob_type();
4076 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
4077 set_entity_ld_ident(init_entity, id);
4079 set_entity_variability(init_entity, variability_initialized);
4080 set_entity_visibility(init_entity, visibility_local);
4081 set_entity_allocation(init_entity, allocation_static);
4083 set_entity_initializer(init_entity, irinitializer);
4085 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
4086 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
4088 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
4089 set_store(copyb_mem);
4092 static void create_initializer_local_variable_entity(entity_t *entity)
4094 assert(entity->kind == ENTITY_VARIABLE);
4095 initializer_t *initializer = entity->variable.initializer;
4096 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4097 ir_entity *irentity = entity->variable.v.entity;
4098 type_t *type = entity->declaration.type;
4100 type = get_aligned_type(type, entity->variable.alignment);
4101 create_local_initializer(initializer, dbgi, irentity, type);
4104 static void create_variable_initializer(entity_t *entity)
4106 assert(entity->kind == ENTITY_VARIABLE);
4107 initializer_t *initializer = entity->variable.initializer;
4108 if (initializer == NULL)
4111 declaration_kind_t declaration_kind
4112 = (declaration_kind_t) entity->declaration.kind;
4113 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
4114 create_initializer_local_variable_entity(entity);
4118 type_t *type = entity->declaration.type;
4119 type_qualifiers_t tq = get_type_qualifier(type, true);
4121 if (initializer->kind == INITIALIZER_VALUE) {
4122 initializer_value_t *initializer_value = &initializer->value;
4123 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4125 ir_node *value = expression_to_firm(initializer_value->value);
4127 type_t *type = initializer_value->value->base.type;
4128 ir_mode *mode = get_ir_mode_storage(type);
4129 value = create_conv(dbgi, value, mode);
4130 value = do_strict_conv(dbgi, value);
4132 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4133 set_value(entity->variable.v.value_number, value);
4135 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4137 ir_entity *irentity = entity->variable.v.entity;
4139 if (tq & TYPE_QUALIFIER_CONST) {
4140 set_entity_variability(irentity, variability_constant);
4142 set_entity_variability(irentity, variability_initialized);
4144 set_atomic_ent_value(irentity, value);
4147 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4148 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4150 ir_entity *irentity = entity->variable.v.entity;
4151 ir_initializer_t *irinitializer
4152 = create_ir_initializer(initializer, type);
4154 if (tq & TYPE_QUALIFIER_CONST) {
4155 set_entity_variability(irentity, variability_constant);
4157 set_entity_variability(irentity, variability_initialized);
4159 set_entity_initializer(irentity, irinitializer);
4163 static void create_variable_length_array(entity_t *entity)
4165 assert(entity->kind == ENTITY_VARIABLE);
4166 assert(entity->variable.initializer == NULL);
4168 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4169 entity->variable.v.vla_base = NULL;
4171 /* TODO: record VLA somewhere so we create the free node when we leave
4175 static void allocate_variable_length_array(entity_t *entity)
4177 assert(entity->kind == ENTITY_VARIABLE);
4178 assert(entity->variable.initializer == NULL);
4179 assert(get_cur_block() != NULL);
4181 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4182 type_t *type = entity->declaration.type;
4183 ir_type *el_type = get_ir_type(type->array.element_type);
4185 /* make sure size_node is calculated */
4186 get_type_size(type);
4187 ir_node *elems = type->array.size_node;
4188 ir_node *mem = get_store();
4189 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4191 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4192 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4195 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4196 entity->variable.v.vla_base = addr;
4200 * Creates a Firm local variable from a declaration.
4202 static void create_local_variable(entity_t *entity)
4204 assert(entity->kind == ENTITY_VARIABLE);
4205 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4207 bool needs_entity = entity->variable.address_taken;
4208 type_t *type = skip_typeref(entity->declaration.type);
4210 /* is it a variable length array? */
4211 if (is_type_array(type) && !type->array.size_constant) {
4212 create_variable_length_array(entity);
4214 } else if (is_type_array(type) || is_type_compound(type)) {
4215 needs_entity = true;
4216 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4217 needs_entity = true;
4221 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4222 create_variable_entity(entity,
4223 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4226 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4227 entity->variable.v.value_number = next_value_number_function;
4228 set_irg_loc_description(current_ir_graph, next_value_number_function,
4230 ++next_value_number_function;
4234 static void create_local_static_variable(entity_t *entity)
4236 assert(entity->kind == ENTITY_VARIABLE);
4237 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4239 type_t *type = skip_typeref(entity->declaration.type);
4240 type = get_aligned_type(type, entity->variable.alignment);
4242 ir_type *const var_type = entity->variable.thread_local ?
4243 get_tls_type() : get_glob_type();
4244 ir_type *const irtype = get_ir_type(type);
4245 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4247 size_t l = strlen(entity->base.symbol->string);
4248 char buf[l + sizeof(".%u")];
4249 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4250 ident *const id = id_unique(buf);
4252 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4254 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4255 set_entity_volatility(irentity, volatility_is_volatile);
4258 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4259 entity->variable.v.entity = irentity;
4261 set_entity_ld_ident(irentity, id);
4262 set_entity_variability(irentity, variability_uninitialized);
4263 set_entity_visibility(irentity, visibility_local);
4264 set_entity_allocation(irentity, entity->variable.thread_local ?
4265 allocation_automatic : allocation_static);
4267 ir_graph *const old_current_ir_graph = current_ir_graph;
4268 current_ir_graph = get_const_code_irg();
4270 create_variable_initializer(entity);
4272 assert(current_ir_graph == get_const_code_irg());
4273 current_ir_graph = old_current_ir_graph;
4278 static void return_statement_to_firm(return_statement_t *statement)
4280 if (get_cur_block() == NULL)
4283 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4284 type_t *type = current_function_entity->declaration.type;
4285 ir_type *func_irtype = get_ir_type(type);
4290 if (get_method_n_ress(func_irtype) > 0) {
4291 ir_type *res_type = get_method_res_type(func_irtype, 0);
4293 if (statement->value != NULL) {
4294 ir_node *node = expression_to_firm(statement->value);
4295 if (!is_compound_type(res_type)) {
4296 type_t *type = statement->value->base.type;
4297 ir_mode *mode = get_ir_mode_storage(type);
4298 node = create_conv(dbgi, node, mode);
4299 node = do_strict_conv(dbgi, node);
4304 if (is_compound_type(res_type)) {
4307 mode = get_type_mode(res_type);
4309 in[0] = new_Unknown(mode);
4313 /* build return_value for its side effects */
4314 if (statement->value != NULL) {
4315 expression_to_firm(statement->value);
4320 ir_node *store = get_store();
4321 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4323 ir_node *end_block = get_irg_end_block(current_ir_graph);
4324 add_immBlock_pred(end_block, ret);
4326 set_cur_block(NULL);
4329 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4331 if (get_cur_block() == NULL)
4334 return expression_to_firm(statement->expression);
4337 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4339 entity_t *entity = compound->scope.entities;
4340 for ( ; entity != NULL; entity = entity->base.next) {
4341 if (!is_declaration(entity))
4344 create_local_declaration(entity);
4347 ir_node *result = NULL;
4348 statement_t *statement = compound->statements;
4349 for ( ; statement != NULL; statement = statement->base.next) {
4350 if (statement->base.next == NULL
4351 && statement->kind == STATEMENT_EXPRESSION) {
4352 result = expression_statement_to_firm(
4353 &statement->expression);
4356 statement_to_firm(statement);
4362 static void create_global_variable(entity_t *entity)
4364 assert(entity->kind == ENTITY_VARIABLE);
4367 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4368 case STORAGE_CLASS_STATIC: vis = visibility_local; break;
4369 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4370 case STORAGE_CLASS_NONE: vis = visibility_external_visible; break;
4372 default: panic("Invalid storage class for global variable");
4375 ir_type *var_type = entity->variable.thread_local ?
4376 get_tls_type() : get_glob_type();
4377 create_variable_entity(entity,
4378 DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4379 set_entity_visibility(entity->variable.v.entity, vis);
4382 static void create_local_declaration(entity_t *entity)
4384 assert(is_declaration(entity));
4386 /* construct type */
4387 (void) get_ir_type(entity->declaration.type);
4388 if (entity->base.symbol == NULL) {
4392 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4393 case STORAGE_CLASS_STATIC:
4394 create_local_static_variable(entity);
4396 case STORAGE_CLASS_EXTERN:
4397 if (entity->kind == ENTITY_FUNCTION) {
4398 assert(entity->function.statement == NULL);
4399 get_function_entity(entity);
4401 create_global_variable(entity);
4402 create_variable_initializer(entity);
4405 case STORAGE_CLASS_NONE:
4406 case STORAGE_CLASS_AUTO:
4407 case STORAGE_CLASS_REGISTER:
4408 if (entity->kind == ENTITY_FUNCTION) {
4409 if (entity->function.statement != NULL) {
4410 get_function_entity(entity);
4411 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4412 enqueue_inner_function(entity);
4414 get_function_entity(entity);
4417 create_local_variable(entity);
4420 case STORAGE_CLASS_TYPEDEF:
4423 panic("invalid storage class found");
4426 static void initialize_local_declaration(entity_t *entity)
4428 if (entity->base.symbol == NULL)
4431 switch ((declaration_kind_t) entity->declaration.kind) {
4432 case DECLARATION_KIND_LOCAL_VARIABLE:
4433 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4434 create_variable_initializer(entity);
4437 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4438 allocate_variable_length_array(entity);
4441 case DECLARATION_KIND_COMPOUND_MEMBER:
4442 case DECLARATION_KIND_GLOBAL_VARIABLE:
4443 case DECLARATION_KIND_FUNCTION:
4444 case DECLARATION_KIND_INNER_FUNCTION:
4447 case DECLARATION_KIND_PARAMETER:
4448 case DECLARATION_KIND_PARAMETER_ENTITY:
4449 panic("can't initialize parameters");
4451 case DECLARATION_KIND_UNKNOWN:
4452 panic("can't initialize unknown declaration");
4454 panic("invalid declaration kind");
4457 static void declaration_statement_to_firm(declaration_statement_t *statement)
4459 entity_t * entity = statement->declarations_begin;
4460 entity_t *const last = statement->declarations_end;
4461 if (entity != NULL) {
4462 for ( ;; entity = entity->base.next) {
4463 if (is_declaration(entity)) {
4464 initialize_local_declaration(entity);
4465 } else if (entity->kind == ENTITY_TYPEDEF) {
4466 type_t *const type = skip_typeref(entity->typedefe.type);
4467 if (is_type_array(type) && type->array.is_vla)
4468 get_vla_size(&type->array);
4476 static void if_statement_to_firm(if_statement_t *statement)
4478 ir_node *cur_block = get_cur_block();
4480 ir_node *fallthrough_block = NULL;
4482 /* the true (blocks) */
4483 ir_node *true_block = NULL;
4484 if (statement->true_statement != NULL) {
4485 true_block = new_immBlock();
4486 set_cur_block(true_block);
4487 statement_to_firm(statement->true_statement);
4488 if (get_cur_block() != NULL) {
4489 ir_node *jmp = new_Jmp();
4490 if (fallthrough_block == NULL)
4491 fallthrough_block = new_immBlock();
4492 add_immBlock_pred(fallthrough_block, jmp);
4496 /* the false (blocks) */
4497 ir_node *false_block = NULL;
4498 if (statement->false_statement != NULL) {
4499 false_block = new_immBlock();
4500 set_cur_block(false_block);
4502 statement_to_firm(statement->false_statement);
4503 if (get_cur_block() != NULL) {
4504 ir_node *jmp = new_Jmp();
4505 if (fallthrough_block == NULL)
4506 fallthrough_block = new_immBlock();
4507 add_immBlock_pred(fallthrough_block, jmp);
4511 /* create the condition */
4512 if (cur_block != NULL) {
4513 if (true_block == NULL || false_block == NULL) {
4514 if (fallthrough_block == NULL)
4515 fallthrough_block = new_immBlock();
4516 if (true_block == NULL)
4517 true_block = fallthrough_block;
4518 if (false_block == NULL)
4519 false_block = fallthrough_block;
4522 set_cur_block(cur_block);
4523 create_condition_evaluation(statement->condition, true_block,
4527 mature_immBlock(true_block);
4528 if (false_block != fallthrough_block && false_block != NULL) {
4529 mature_immBlock(false_block);
4531 if (fallthrough_block != NULL) {
4532 mature_immBlock(fallthrough_block);
4535 set_cur_block(fallthrough_block);
4538 static void while_statement_to_firm(while_statement_t *statement)
4540 ir_node *jmp = NULL;
4541 if (get_cur_block() != NULL) {
4545 /* create the header block */
4546 ir_node *header_block = new_immBlock();
4548 add_immBlock_pred(header_block, jmp);
4552 ir_node *old_continue_label = continue_label;
4553 ir_node *old_break_label = break_label;
4554 continue_label = header_block;
4557 ir_node *body_block = new_immBlock();
4558 set_cur_block(body_block);
4559 statement_to_firm(statement->body);
4560 ir_node *false_block = break_label;
4562 assert(continue_label == header_block);
4563 continue_label = old_continue_label;
4564 break_label = old_break_label;
4566 if (get_cur_block() != NULL) {
4568 add_immBlock_pred(header_block, jmp);
4571 /* shortcut for while(true) */
4572 if (is_constant_expression(statement->condition)
4573 && fold_constant(statement->condition) != 0) {
4574 set_cur_block(header_block);
4575 ir_node *header_jmp = new_Jmp();
4576 add_immBlock_pred(body_block, header_jmp);
4578 keep_alive(body_block);
4579 keep_all_memory(body_block);
4580 set_cur_block(body_block);
4582 if (false_block == NULL) {
4583 false_block = new_immBlock();
4586 /* create the condition */
4587 set_cur_block(header_block);
4589 create_condition_evaluation(statement->condition, body_block,
4593 mature_immBlock(body_block);
4594 mature_immBlock(header_block);
4595 if (false_block != NULL) {
4596 mature_immBlock(false_block);
4599 set_cur_block(false_block);
4602 static void do_while_statement_to_firm(do_while_statement_t *statement)
4604 ir_node *jmp = NULL;
4605 if (get_cur_block() != NULL) {
4609 /* create the header block */
4610 ir_node *header_block = new_immBlock();
4613 ir_node *body_block = new_immBlock();
4615 add_immBlock_pred(body_block, jmp);
4618 ir_node *old_continue_label = continue_label;
4619 ir_node *old_break_label = break_label;
4620 continue_label = header_block;
4623 set_cur_block(body_block);
4624 statement_to_firm(statement->body);
4625 ir_node *false_block = break_label;
4627 assert(continue_label == header_block);
4628 continue_label = old_continue_label;
4629 break_label = old_break_label;
4631 if (get_cur_block() != NULL) {
4632 ir_node *body_jmp = new_Jmp();
4633 add_immBlock_pred(header_block, body_jmp);
4634 mature_immBlock(header_block);
4637 if (false_block == NULL) {
4638 false_block = new_immBlock();
4641 /* create the condition */
4642 set_cur_block(header_block);
4644 create_condition_evaluation(statement->condition, body_block, false_block);
4645 mature_immBlock(body_block);
4646 mature_immBlock(header_block);
4647 mature_immBlock(false_block);
4649 set_cur_block(false_block);
4652 static void for_statement_to_firm(for_statement_t *statement)
4654 ir_node *jmp = NULL;
4656 /* create declarations */
4657 entity_t *entity = statement->scope.entities;
4658 for ( ; entity != NULL; entity = entity->base.next) {
4659 if (!is_declaration(entity))
4662 create_local_declaration(entity);
4665 if (get_cur_block() != NULL) {
4666 entity = statement->scope.entities;
4667 for ( ; entity != NULL; entity = entity->base.next) {
4668 if (!is_declaration(entity))
4671 initialize_local_declaration(entity);
4674 if (statement->initialisation != NULL) {
4675 expression_to_firm(statement->initialisation);
4682 /* create the step block */
4683 ir_node *const step_block = new_immBlock();
4684 set_cur_block(step_block);
4685 if (statement->step != NULL) {
4686 expression_to_firm(statement->step);
4688 ir_node *const step_jmp = new_Jmp();
4690 /* create the header block */
4691 ir_node *const header_block = new_immBlock();
4692 set_cur_block(header_block);
4694 add_immBlock_pred(header_block, jmp);
4696 add_immBlock_pred(header_block, step_jmp);
4698 /* the false block */
4699 ir_node *const false_block = new_immBlock();
4702 ir_node *body_block;
4703 if (statement->body != NULL) {
4704 ir_node *const old_continue_label = continue_label;
4705 ir_node *const old_break_label = break_label;
4706 continue_label = step_block;
4707 break_label = false_block;
4709 body_block = new_immBlock();
4710 set_cur_block(body_block);
4711 statement_to_firm(statement->body);
4713 assert(continue_label == step_block);
4714 assert(break_label == false_block);
4715 continue_label = old_continue_label;
4716 break_label = old_break_label;
4718 if (get_cur_block() != NULL) {
4720 add_immBlock_pred(step_block, jmp);
4723 body_block = step_block;
4726 /* create the condition */
4727 set_cur_block(header_block);
4728 if (statement->condition != NULL) {
4729 create_condition_evaluation(statement->condition, body_block,
4732 keep_alive(header_block);
4733 keep_all_memory(header_block);
4735 add_immBlock_pred(body_block, jmp);
4738 mature_immBlock(body_block);
4739 mature_immBlock(false_block);
4740 mature_immBlock(step_block);
4741 mature_immBlock(header_block);
4742 mature_immBlock(false_block);
4744 set_cur_block(false_block);
4747 static void create_jump_statement(const statement_t *statement,
4748 ir_node *target_block)
4750 if (get_cur_block() == NULL)
4753 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4754 ir_node *jump = new_d_Jmp(dbgi);
4755 add_immBlock_pred(target_block, jump);
4757 set_cur_block(NULL);
4760 static ir_node *get_break_label(void)
4762 if (break_label == NULL) {
4763 break_label = new_immBlock();
4768 static void switch_statement_to_firm(switch_statement_t *statement)
4770 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4772 ir_node *expression = expression_to_firm(statement->expression);
4773 ir_node *cond = new_d_Cond(dbgi, expression);
4775 set_cur_block(NULL);
4777 ir_node *const old_switch_cond = current_switch_cond;
4778 ir_node *const old_break_label = break_label;
4779 const bool old_saw_default_label = saw_default_label;
4780 saw_default_label = false;
4781 current_switch_cond = cond;
4783 switch_statement_t *const old_switch = current_switch;
4784 current_switch = statement;
4786 /* determine a free number for the default label */
4787 unsigned long num_cases = 0;
4789 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4790 if (l->expression == NULL) {
4794 if (l->last_case >= l->first_case)
4795 num_cases += l->last_case - l->first_case + 1;
4796 if (l->last_case > def_nr)
4797 def_nr = l->last_case;
4800 if (def_nr == INT_MAX) {
4801 /* Bad: an overflow will occurr, we cannot be sure that the
4802 * maximum + 1 is a free number. Scan the values a second
4803 * time to find a free number.
4805 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4807 memset(bits, 0, (num_cases + 7) >> 3);
4808 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4809 if (l->expression == NULL) {
4813 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4814 if (start < num_cases && l->last_case >= 0) {
4815 unsigned long end = (unsigned long)l->last_case < num_cases ?
4816 (unsigned long)l->last_case : num_cases - 1;
4817 for (unsigned long cns = start; cns <= end; ++cns) {
4818 bits[cns >> 3] |= (1 << (cns & 7));
4822 /* We look at the first num_cases constants:
4823 * Either they are densed, so we took the last (num_cases)
4824 * one, or they are non densed, so we will find one free
4828 for (i = 0; i < num_cases; ++i)
4829 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4837 statement->default_proj_nr = def_nr;
4839 if (statement->body != NULL) {
4840 statement_to_firm(statement->body);
4843 if (get_cur_block() != NULL) {
4844 ir_node *jmp = new_Jmp();
4845 add_immBlock_pred(get_break_label(), jmp);
4848 if (!saw_default_label) {
4849 set_cur_block(get_nodes_block(cond));
4850 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4851 statement->default_proj_nr);
4852 add_immBlock_pred(get_break_label(), proj);
4855 if (break_label != NULL) {
4856 mature_immBlock(break_label);
4858 set_cur_block(break_label);
4860 assert(current_switch_cond == cond);
4861 current_switch = old_switch;
4862 current_switch_cond = old_switch_cond;
4863 break_label = old_break_label;
4864 saw_default_label = old_saw_default_label;
4867 static void case_label_to_firm(const case_label_statement_t *statement)
4869 if (statement->is_empty_range)
4872 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4874 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4877 ir_node *block = new_immBlock();
4879 set_cur_block(get_nodes_block(current_switch_cond));
4880 if (statement->expression != NULL) {
4881 long pn = statement->first_case;
4882 long end_pn = statement->last_case;
4883 assert(pn <= end_pn);
4884 /* create jumps for all cases in the given range */
4886 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4887 add_immBlock_pred(block, proj);
4888 } while(pn++ < end_pn);
4890 saw_default_label = true;
4891 proj = new_d_defaultProj(dbgi, current_switch_cond,
4892 current_switch->default_proj_nr);
4894 add_immBlock_pred(block, proj);
4897 if (fallthrough != NULL) {
4898 add_immBlock_pred(block, fallthrough);
4900 mature_immBlock(block);
4901 set_cur_block(block);
4903 if (statement->statement != NULL) {
4904 statement_to_firm(statement->statement);
4908 static void label_to_firm(const label_statement_t *statement)
4910 ir_node *block = get_label_block(statement->label);
4912 if (get_cur_block() != NULL) {
4913 ir_node *jmp = new_Jmp();
4914 add_immBlock_pred(block, jmp);
4917 set_cur_block(block);
4919 keep_all_memory(block);
4921 if (statement->statement != NULL) {
4922 statement_to_firm(statement->statement);
4926 static void goto_to_firm(const goto_statement_t *statement)
4928 if (get_cur_block() == NULL)
4931 if (statement->expression) {
4932 ir_node *irn = expression_to_firm(statement->expression);
4933 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4934 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4936 set_irn_link(ijmp, ijmp_list);
4939 ir_node *block = get_label_block(statement->label);
4940 ir_node *jmp = new_Jmp();
4941 add_immBlock_pred(block, jmp);
4943 set_cur_block(NULL);
4946 static void asm_statement_to_firm(const asm_statement_t *statement)
4948 bool needs_memory = false;
4950 if (statement->is_volatile) {
4951 needs_memory = true;
4954 size_t n_clobbers = 0;
4955 asm_clobber_t *clobber = statement->clobbers;
4956 for ( ; clobber != NULL; clobber = clobber->next) {
4957 const char *clobber_str = clobber->clobber.begin;
4959 if (!be_is_valid_clobber(clobber_str)) {
4960 errorf(&statement->base.source_position,
4961 "invalid clobber '%s' specified", clobber->clobber);
4965 if (strcmp(clobber_str, "memory") == 0) {
4966 needs_memory = true;
4970 ident *id = new_id_from_str(clobber_str);
4971 obstack_ptr_grow(&asm_obst, id);
4974 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4975 ident **clobbers = NULL;
4976 if (n_clobbers > 0) {
4977 clobbers = obstack_finish(&asm_obst);
4980 size_t n_inputs = 0;
4981 asm_argument_t *argument = statement->inputs;
4982 for ( ; argument != NULL; argument = argument->next)
4984 size_t n_outputs = 0;
4985 argument = statement->outputs;
4986 for ( ; argument != NULL; argument = argument->next)
4989 unsigned next_pos = 0;
4991 ir_node *ins[n_inputs + n_outputs + 1];
4994 ir_asm_constraint tmp_in_constraints[n_outputs];
4996 const expression_t *out_exprs[n_outputs];
4997 ir_node *out_addrs[n_outputs];
4998 size_t out_size = 0;
5000 argument = statement->outputs;
5001 for ( ; argument != NULL; argument = argument->next) {
5002 const char *constraints = argument->constraints.begin;
5003 asm_constraint_flags_t asm_flags
5004 = be_parse_asm_constraints(constraints);
5006 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5007 warningf(&statement->base.source_position,
5008 "some constraints in '%s' are not supported", constraints);
5010 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5011 errorf(&statement->base.source_position,
5012 "some constraints in '%s' are invalid", constraints);
5015 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
5016 errorf(&statement->base.source_position,
5017 "no write flag specified for output constraints '%s'",
5022 unsigned pos = next_pos++;
5023 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5024 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5025 expression_t *expr = argument->expression;
5026 ir_node *addr = expression_to_addr(expr);
5027 /* in+output, construct an artifical same_as constraint on the
5029 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
5031 ir_node *value = get_value_from_lvalue(expr, addr);
5033 snprintf(buf, sizeof(buf), "%u", pos);
5035 ir_asm_constraint constraint;
5036 constraint.pos = pos;
5037 constraint.constraint = new_id_from_str(buf);
5038 constraint.mode = get_ir_mode_storage(expr->base.type);
5039 tmp_in_constraints[in_size] = constraint;
5040 ins[in_size] = value;
5045 out_exprs[out_size] = expr;
5046 out_addrs[out_size] = addr;
5048 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5049 /* pure memory ops need no input (but we have to make sure we
5050 * attach to the memory) */
5051 assert(! (asm_flags &
5052 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5053 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5054 needs_memory = true;
5056 /* we need to attach the address to the inputs */
5057 expression_t *expr = argument->expression;
5059 ir_asm_constraint constraint;
5060 constraint.pos = pos;
5061 constraint.constraint = new_id_from_str(constraints);
5062 constraint.mode = NULL;
5063 tmp_in_constraints[in_size] = constraint;
5065 ins[in_size] = expression_to_addr(expr);
5069 errorf(&statement->base.source_position,
5070 "only modifiers but no place set in constraints '%s'",
5075 ir_asm_constraint constraint;
5076 constraint.pos = pos;
5077 constraint.constraint = new_id_from_str(constraints);
5078 constraint.mode = get_ir_mode_storage(argument->expression->base.type);
5080 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5082 assert(obstack_object_size(&asm_obst)
5083 == out_size * sizeof(ir_asm_constraint));
5084 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
5087 obstack_grow(&asm_obst, tmp_in_constraints,
5088 in_size * sizeof(tmp_in_constraints[0]));
5089 /* find and count input and output arguments */
5090 argument = statement->inputs;
5091 for ( ; argument != NULL; argument = argument->next) {
5092 const char *constraints = argument->constraints.begin;
5093 asm_constraint_flags_t asm_flags
5094 = be_parse_asm_constraints(constraints);
5096 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
5097 errorf(&statement->base.source_position,
5098 "some constraints in '%s' are not supported", constraints);
5101 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
5102 errorf(&statement->base.source_position,
5103 "some constraints in '%s' are invalid", constraints);
5106 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
5107 errorf(&statement->base.source_position,
5108 "write flag specified for input constraints '%s'",
5114 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
5115 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
5116 /* we can treat this as "normal" input */
5117 input = expression_to_firm(argument->expression);
5118 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
5119 /* pure memory ops need no input (but we have to make sure we
5120 * attach to the memory) */
5121 assert(! (asm_flags &
5122 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
5123 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
5124 needs_memory = true;
5125 input = expression_to_addr(argument->expression);
5127 errorf(&statement->base.source_position,
5128 "only modifiers but no place set in constraints '%s'",
5133 ir_asm_constraint constraint;
5134 constraint.pos = next_pos++;
5135 constraint.constraint = new_id_from_str(constraints);
5136 constraint.mode = get_irn_mode(input);
5138 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5139 ins[in_size++] = input;
5143 ir_asm_constraint constraint;
5144 constraint.pos = next_pos++;
5145 constraint.constraint = new_id_from_str("");
5146 constraint.mode = mode_M;
5148 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5149 ins[in_size++] = get_store();
5152 assert(obstack_object_size(&asm_obst)
5153 == in_size * sizeof(ir_asm_constraint));
5154 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5156 /* create asm node */
5157 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5159 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5161 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5162 out_size, output_constraints,
5163 n_clobbers, clobbers, asm_text);
5165 if (statement->is_volatile) {
5166 set_irn_pinned(node, op_pin_state_pinned);
5168 set_irn_pinned(node, op_pin_state_floats);
5171 /* create output projs & connect them */
5173 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5178 for (i = 0; i < out_size; ++i) {
5179 const expression_t *out_expr = out_exprs[i];
5181 ir_mode *mode = get_ir_mode_storage(out_expr->base.type);
5182 ir_node *proj = new_Proj(node, mode, pn);
5183 ir_node *addr = out_addrs[i];
5185 set_value_for_expression_addr(out_expr, proj, addr);
5189 static void ms_try_statement_to_firm(ms_try_statement_t *statement)
5191 statement_to_firm(statement->try_statement);
5192 warningf(&statement->base.source_position, "structured exception handling ignored");
5195 static void leave_statement_to_firm(leave_statement_t *statement)
5197 errorf(&statement->base.source_position, "__leave not supported yet");
5201 * Transform a statement.
5203 static void statement_to_firm(statement_t *statement)
5206 assert(!statement->base.transformed);
5207 statement->base.transformed = true;
5210 switch (statement->kind) {
5211 case STATEMENT_INVALID:
5212 panic("invalid statement found");
5213 case STATEMENT_EMPTY:
5216 case STATEMENT_COMPOUND:
5217 compound_statement_to_firm(&statement->compound);
5219 case STATEMENT_RETURN:
5220 return_statement_to_firm(&statement->returns);
5222 case STATEMENT_EXPRESSION:
5223 expression_statement_to_firm(&statement->expression);
5226 if_statement_to_firm(&statement->ifs);
5228 case STATEMENT_WHILE:
5229 while_statement_to_firm(&statement->whiles);
5231 case STATEMENT_DO_WHILE:
5232 do_while_statement_to_firm(&statement->do_while);
5234 case STATEMENT_DECLARATION:
5235 declaration_statement_to_firm(&statement->declaration);
5237 case STATEMENT_BREAK:
5238 create_jump_statement(statement, get_break_label());
5240 case STATEMENT_CONTINUE:
5241 create_jump_statement(statement, continue_label);
5243 case STATEMENT_SWITCH:
5244 switch_statement_to_firm(&statement->switchs);
5246 case STATEMENT_CASE_LABEL:
5247 case_label_to_firm(&statement->case_label);
5250 for_statement_to_firm(&statement->fors);
5252 case STATEMENT_LABEL:
5253 label_to_firm(&statement->label);
5255 case STATEMENT_GOTO:
5256 goto_to_firm(&statement->gotos);
5259 asm_statement_to_firm(&statement->asms);
5261 case STATEMENT_MS_TRY:
5262 ms_try_statement_to_firm(&statement->ms_try);
5264 case STATEMENT_LEAVE:
5265 leave_statement_to_firm(&statement->leave);
5268 panic("statement not implemented");
5271 static int count_local_variables(const entity_t *entity,
5272 const entity_t *const last)
5275 for (; entity != NULL; entity = entity->base.next) {
5279 if (entity->kind == ENTITY_VARIABLE) {
5280 type = skip_typeref(entity->declaration.type);
5281 address_taken = entity->variable.address_taken;
5282 } else if (entity->kind == ENTITY_PARAMETER) {
5283 type = skip_typeref(entity->declaration.type);
5284 address_taken = entity->parameter.address_taken;
5289 if (!address_taken && is_type_scalar(type))
5298 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5300 int *const count = env;
5302 switch (stmt->kind) {
5303 case STATEMENT_DECLARATION: {
5304 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5305 *count += count_local_variables(decl_stmt->declarations_begin,
5306 decl_stmt->declarations_end);
5311 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5319 static int get_function_n_local_vars(entity_t *entity)
5323 /* count parameters */
5324 count += count_local_variables(entity->function.parameters.entities, NULL);
5326 /* count local variables declared in body */
5327 walk_statements(entity->function.statement, count_local_variables_in_stmt,
5332 static void initialize_function_parameters(entity_t *entity)
5334 assert(entity->kind == ENTITY_FUNCTION);
5335 ir_graph *irg = current_ir_graph;
5336 ir_node *args = get_irg_args(irg);
5337 ir_node *start_block = get_irg_start_block(irg);
5338 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5341 entity_t *parameter = entity->function.parameters.entities;
5342 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5343 assert(parameter->kind == ENTITY_PARAMETER);
5344 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5345 type_t *type = skip_typeref(parameter->declaration.type);
5347 bool needs_entity = parameter->parameter.address_taken;
5348 assert(!is_type_array(type));
5349 if (is_type_compound(type)) {
5350 needs_entity = true;
5354 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5355 ident *id = new_id_from_str(parameter->base.symbol->string);
5356 set_entity_ident(entity, id);
5358 parameter->declaration.kind
5359 = DECLARATION_KIND_PARAMETER_ENTITY;
5360 parameter->parameter.v.entity = entity;
5364 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5365 ir_mode *param_mode = get_type_mode(param_irtype);
5368 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5370 ir_mode *mode = get_ir_mode_storage(type);
5371 value = create_conv(NULL, value, mode);
5372 value = do_strict_conv(NULL, value);
5374 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5375 parameter->parameter.v.value_number = next_value_number_function;
5376 set_irg_loc_description(current_ir_graph, next_value_number_function,
5378 ++next_value_number_function;
5380 set_value(parameter->parameter.v.value_number, value);
5385 * Handle additional decl modifiers for IR-graphs
5387 * @param irg the IR-graph
5388 * @param dec_modifiers additional modifiers
5390 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5392 if (decl_modifiers & DM_RETURNS_TWICE) {
5393 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5394 set_irg_additional_property(irg, mtp_property_returns_twice);
5396 if (decl_modifiers & DM_NORETURN) {
5397 /* TRUE if the declaration includes the Microsoft
5398 __declspec(noreturn) specifier. */
5399 set_irg_additional_property(irg, mtp_property_noreturn);
5401 if (decl_modifiers & DM_NOTHROW) {
5402 /* TRUE if the declaration includes the Microsoft
5403 __declspec(nothrow) specifier. */
5404 set_irg_additional_property(irg, mtp_property_nothrow);
5406 if (decl_modifiers & DM_NAKED) {
5407 /* TRUE if the declaration includes the Microsoft
5408 __declspec(naked) specifier. */
5409 set_irg_additional_property(irg, mtp_property_naked);
5411 if (decl_modifiers & DM_FORCEINLINE) {
5412 /* TRUE if the declaration includes the
5413 Microsoft __forceinline specifier. */
5414 set_irg_inline_property(irg, irg_inline_forced);
5416 if (decl_modifiers & DM_NOINLINE) {
5417 /* TRUE if the declaration includes the Microsoft
5418 __declspec(noinline) specifier. */
5419 set_irg_inline_property(irg, irg_inline_forbidden);
5423 static void add_function_pointer(ir_type *segment, ir_entity *method,
5424 const char *unique_template)
5426 ir_type *method_type = get_entity_type(method);
5427 ident *id = id_unique(unique_template);
5428 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5430 ident *ide = id_unique(unique_template);
5431 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5432 ir_graph *irg = get_const_code_irg();
5433 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5436 set_entity_compiler_generated(ptr, 1);
5437 set_entity_variability(ptr, variability_constant);
5438 set_atomic_ent_value(ptr, val);
5442 * Generate possible IJmp branches to a given label block.
5444 static void gen_ijmp_branches(ir_node *block)
5447 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5448 add_immBlock_pred(block, ijmp);
5453 * Create code for a function.
5455 static void create_function(entity_t *entity)
5457 assert(entity->kind == ENTITY_FUNCTION);
5458 ir_entity *function_entity = get_function_entity(entity);
5460 if (entity->function.statement == NULL)
5463 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5464 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5465 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5467 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5468 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5469 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5472 current_function_entity = entity;
5473 current_function_name = NULL;
5474 current_funcsig = NULL;
5476 assert(all_labels == NULL);
5477 all_labels = NEW_ARR_F(label_t *, 0);
5480 int n_local_vars = get_function_n_local_vars(entity);
5481 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5483 ir_graph *old_current_function = current_function;
5484 current_function = irg;
5486 set_irg_fp_model(irg, firm_opt.fp_model);
5487 tarval_enable_fp_ops(1);
5488 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5490 ir_node *first_block = get_cur_block();
5492 /* set inline flags */
5493 if (entity->function.is_inline)
5494 set_irg_inline_property(irg, irg_inline_recomended);
5495 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5497 next_value_number_function = 0;
5498 initialize_function_parameters(entity);
5500 statement_to_firm(entity->function.statement);
5502 ir_node *end_block = get_irg_end_block(irg);
5504 /* do we have a return statement yet? */
5505 if (get_cur_block() != NULL) {
5506 type_t *type = skip_typeref(entity->declaration.type);
5507 assert(is_type_function(type));
5508 const function_type_t *func_type = &type->function;
5509 const type_t *return_type
5510 = skip_typeref(func_type->return_type);
5513 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5514 ret = new_Return(get_store(), 0, NULL);
5517 if (is_type_scalar(return_type)) {
5518 mode = get_ir_mode_storage(func_type->return_type);
5524 /* ยง5.1.2.2.3 main implicitly returns 0 */
5525 if (is_main(entity)) {
5526 in[0] = new_Const(get_mode_null(mode));
5528 in[0] = new_Unknown(mode);
5530 ret = new_Return(get_store(), 1, in);
5532 add_immBlock_pred(end_block, ret);
5535 bool has_computed_gotos = false;
5536 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5537 label_t *label = all_labels[i];
5538 if (label->address_taken) {
5539 gen_ijmp_branches(label->block);
5540 has_computed_gotos = true;
5542 mature_immBlock(label->block);
5544 if (has_computed_gotos) {
5545 /* if we have computed goto's in the function, we cannot inline it */
5546 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5547 warningf(&entity->base.source_position,
5548 "function '%Y' can never be inlined because it contains a computed goto",
5549 entity->base.symbol);
5551 set_irg_inline_property(irg, irg_inline_forbidden);
5554 DEL_ARR_F(all_labels);
5557 mature_immBlock(first_block);
5558 mature_immBlock(end_block);
5560 irg_finalize_cons(irg);
5562 /* finalize the frame type */
5563 ir_type *frame_type = get_irg_frame_type(irg);
5564 int n = get_compound_n_members(frame_type);
5567 for (int i = 0; i < n; ++i) {
5568 ir_entity *entity = get_compound_member(frame_type, i);
5569 ir_type *entity_type = get_entity_type(entity);
5571 int align = get_type_alignment_bytes(entity_type);
5572 if (align > align_all)
5576 misalign = offset % align;
5578 offset += align - misalign;
5582 set_entity_offset(entity, offset);
5583 offset += get_type_size_bytes(entity_type);
5585 set_type_size_bytes(frame_type, offset);
5586 set_type_alignment_bytes(frame_type, align_all);
5589 current_function = old_current_function;
5591 /* create inner functions */
5593 for (inner = next_inner_function(); inner != NULL;
5594 inner = next_inner_function()) {
5595 create_function(inner);
5599 static void scope_to_firm(scope_t *scope)
5601 /* first pass: create declarations */
5602 entity_t *entity = scope->entities;
5603 for ( ; entity != NULL; entity = entity->base.next) {
5604 if (entity->base.symbol == NULL)
5607 if (entity->kind == ENTITY_FUNCTION) {
5608 get_function_entity(entity);
5609 } else if (entity->kind == ENTITY_VARIABLE) {
5610 create_global_variable(entity);
5614 /* second pass: create code/initializers */
5615 entity = scope->entities;
5616 for ( ; entity != NULL; entity = entity->base.next) {
5617 if (entity->base.symbol == NULL)
5620 if (entity->kind == ENTITY_FUNCTION) {
5621 create_function(entity);
5622 } else if (entity->kind == ENTITY_VARIABLE) {
5623 assert(entity->declaration.kind
5624 == DECLARATION_KIND_GLOBAL_VARIABLE);
5625 current_ir_graph = get_const_code_irg();
5626 create_variable_initializer(entity);
5631 void init_ast2firm(void)
5633 obstack_init(&asm_obst);
5634 init_atomic_modes();
5636 /* OS option must be set to the backend */
5637 switch (firm_opt.os_support) {
5638 case OS_SUPPORT_MINGW:
5639 create_ld_ident = create_name_win32;
5641 case OS_SUPPORT_LINUX:
5642 create_ld_ident = create_name_linux_elf;
5644 case OS_SUPPORT_MACHO:
5645 create_ld_ident = create_name_macho;
5648 panic("unexpected OS support mode");
5651 /* create idents for all known runtime functions */
5652 for (size_t i = 0; i < lengthof(rts_data); ++i) {
5653 rts_idents[i] = new_id_from_str(rts_data[i].name);
5656 entitymap_init(&entitymap);
5659 static void init_ir_types(void)
5661 static int ir_types_initialized = 0;
5662 if (ir_types_initialized)
5664 ir_types_initialized = 1;
5666 ir_type_int = get_ir_type(type_int);
5667 ir_type_const_char = get_ir_type(type_const_char);
5668 ir_type_wchar_t = get_ir_type(type_wchar_t);
5669 ir_type_void = get_ir_type(type_void);
5671 const backend_params *be_params = be_get_backend_param();
5672 mode_float_arithmetic = be_params->mode_float_arithmetic;
5675 void exit_ast2firm(void)
5677 entitymap_destroy(&entitymap);
5678 obstack_free(&asm_obst, NULL);
5681 static void global_asm_to_firm(statement_t *s)
5683 for (; s != NULL; s = s->base.next) {
5684 assert(s->kind == STATEMENT_ASM);
5686 char const *const text = s->asms.asm_text.begin;
5687 size_t size = s->asms.asm_text.size;
5689 /* skip the last \0 */
5690 if (text[size - 1] == '\0')
5693 ident *const id = new_id_from_chars(text, size);
5698 void translation_unit_to_firm(translation_unit_t *unit)
5700 /* just to be sure */
5701 continue_label = NULL;
5703 current_switch_cond = NULL;
5704 current_translation_unit = unit;
5707 inner_functions = NEW_ARR_F(entity_t *, 0);
5709 scope_to_firm(&unit->scope);
5710 global_asm_to_firm(unit->global_asm);
5712 DEL_ARR_F(inner_functions);
5713 inner_functions = NULL;
5715 current_ir_graph = NULL;
5716 current_translation_unit = NULL;