2 * This file is part of cparser.
3 * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version 2
8 * of the License, or (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
27 #include <libfirm/firm.h>
28 #include <libfirm/adt/obst.h>
29 #include <libfirm/be.h>
33 #include "adt/error.h"
34 #include "adt/array.h"
41 #include "diagnostic.h"
42 #include "lang_features.h"
44 #include "type_hash.h"
46 #include "walk_statements.h"
48 #include "entitymap_t.h"
49 #include "driver/firm_opt.h"
50 #include "driver/firm_cmdline.h"
52 static ir_type *ir_type_const_char;
53 static ir_type *ir_type_wchar_t;
54 static ir_type *ir_type_void;
55 static ir_type *ir_type_int;
57 static int next_value_number_function;
58 static ir_node *continue_label;
59 static ir_node *break_label;
60 static ir_node *current_switch_cond;
61 static bool saw_default_label;
62 static label_t **all_labels;
63 static entity_t **inner_functions;
64 static ir_node *ijmp_list;
65 static bool constant_folding;
67 extern bool have_const_functions;
69 static const entity_t *current_function_entity;
70 static ir_node *current_function_name;
71 static ir_node *current_funcsig;
72 static switch_statement_t *current_switch;
73 static ir_graph *current_function;
74 static translation_unit_t *current_translation_unit;
76 static entitymap_t entitymap;
78 static struct obstack asm_obst;
80 typedef enum declaration_kind_t {
81 DECLARATION_KIND_UNKNOWN,
82 DECLARATION_KIND_VARIABLE_LENGTH_ARRAY,
83 DECLARATION_KIND_GLOBAL_VARIABLE,
84 DECLARATION_KIND_LOCAL_VARIABLE,
85 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
86 DECLARATION_KIND_PARAMETER,
87 DECLARATION_KIND_PARAMETER_ENTITY,
88 DECLARATION_KIND_FUNCTION,
89 DECLARATION_KIND_COMPOUND_MEMBER,
90 DECLARATION_KIND_INNER_FUNCTION
93 static ir_mode *get_ir_mode(type_t *type);
94 static ir_type *get_ir_type_incomplete(type_t *type);
96 static void enqueue_inner_function(entity_t *entity)
98 ARR_APP1(entity_t*, inner_functions, entity);
101 static entity_t *next_inner_function(void)
103 int len = ARR_LEN(inner_functions);
107 entity_t *entity = inner_functions[len-1];
108 ARR_SHRINKLEN(inner_functions, len-1);
113 ir_node *uninitialized_local_var(ir_graph *irg, ir_mode *mode, int pos)
115 const entity_t *entity = get_irg_loc_description(irg, pos);
117 if (entity != NULL) {
118 warningf(&entity->base.source_position,
119 "%s '%#T' might be used uninitialized",
120 get_entity_kind_name(entity->kind),
121 entity->declaration.type, entity->base.symbol);
123 return new_r_Unknown(irg, mode);
126 unsigned dbg_snprint(char *buf, unsigned len, const dbg_info *dbg)
128 const source_position_t *pos = (const source_position_t*) dbg;
131 return (unsigned) snprintf(buf, len, "%s:%u", pos->input_name,
135 const char *dbg_retrieve(const dbg_info *dbg, unsigned *line)
137 const source_position_t *pos = (const source_position_t*) dbg;
142 return pos->input_name;
145 static dbg_info *get_dbg_info(const source_position_t *pos)
147 return (dbg_info*) pos;
150 static ir_mode *atomic_modes[ATOMIC_TYPE_LAST+1];
152 static ir_mode *mode_int, *mode_uint;
154 static ir_node *_expression_to_firm(const expression_t *expression);
155 static ir_node *expression_to_firm(const expression_t *expression);
156 static void create_local_declaration(entity_t *entity);
158 static ir_mode *init_atomic_ir_mode(atomic_type_kind_t kind)
160 unsigned flags = get_atomic_type_flags(kind);
161 unsigned size = get_atomic_type_size(kind);
162 if ( (flags & (ATOMIC_TYPE_FLAG_INTEGER | ATOMIC_TYPE_FLAG_FLOAT))
163 && !(flags & ATOMIC_TYPE_FLAG_COMPLEX)) {
166 unsigned bit_size = size * 8;
167 bool is_signed = (flags & ATOMIC_TYPE_FLAG_SIGNED) != 0;
168 unsigned modulo_shift;
169 ir_mode_arithmetic arithmetic;
171 if (flags & ATOMIC_TYPE_FLAG_INTEGER) {
172 assert(! (flags & ATOMIC_TYPE_FLAG_FLOAT));
173 snprintf(name, sizeof(name), "%s%u", is_signed ? "I" : "U",
175 sort = irms_int_number;
176 arithmetic = irma_twos_complement;
177 modulo_shift = bit_size < machine_size ? machine_size : bit_size;
179 assert(flags & ATOMIC_TYPE_FLAG_FLOAT);
180 snprintf(name, sizeof(name), "F%u", bit_size);
181 sort = irms_float_number;
182 arithmetic = irma_ieee754;
185 return new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
193 * Initialises the atomic modes depending on the machine size.
195 static void init_atomic_modes(void)
197 for (int i = 0; i <= ATOMIC_TYPE_LAST; ++i) {
198 atomic_modes[i] = init_atomic_ir_mode((atomic_type_kind_t) i);
200 mode_int = atomic_modes[ATOMIC_TYPE_INT];
201 mode_uint = atomic_modes[ATOMIC_TYPE_UINT];
203 /* there's no real void type in firm */
204 atomic_modes[ATOMIC_TYPE_VOID] = atomic_modes[ATOMIC_TYPE_CHAR];
206 /* initialize pointer modes */
208 ir_mode_sort sort = irms_reference;
209 unsigned bit_size = machine_size;
211 ir_mode_arithmetic arithmetic = irma_twos_complement;
212 unsigned modulo_shift
213 = bit_size < machine_size ? machine_size : bit_size;
215 snprintf(name, sizeof(name), "p%u", machine_size);
216 ir_mode *ptr_mode = new_ir_mode(name, sort, bit_size, is_signed, arithmetic,
219 set_reference_mode_signed_eq(ptr_mode, atomic_modes[get_intptr_kind()]);
220 set_reference_mode_unsigned_eq(ptr_mode, atomic_modes[get_uintptr_kind()]);
222 /* Hmm, pointers should be machine size */
223 set_modeP_data(ptr_mode);
224 set_modeP_code(ptr_mode);
227 ir_mode *get_atomic_mode(atomic_type_kind_t kind)
229 assert(kind <= ATOMIC_TYPE_LAST);
230 return atomic_modes[kind];
233 static unsigned get_compound_type_size(compound_type_t *type)
235 ir_type *irtype = get_ir_type((type_t*) type);
236 return get_type_size_bytes(irtype);
239 static unsigned get_array_type_size(array_type_t *type)
241 assert(!type->is_vla);
242 ir_type *irtype = get_ir_type((type_t*) type);
243 return get_type_size_bytes(irtype);
246 static unsigned get_type_size_const(type_t *type)
250 panic("error type occurred");
252 return get_atomic_type_size(type->atomic.akind);
254 return 2 * get_atomic_type_size(type->complex.akind);
256 return get_atomic_type_size(type->imaginary.akind);
258 return get_mode_size_bytes(mode_int);
259 case TYPE_COMPOUND_UNION:
260 case TYPE_COMPOUND_STRUCT:
261 return get_compound_type_size(&type->compound);
263 /* just a pointer to the function */
264 return get_mode_size_bytes(mode_P_code);
267 return get_mode_size_bytes(mode_P_data);
269 return get_array_type_size(&type->array);
271 return get_type_size_const(type->builtin.real_type);
273 panic("type size of bitfield request");
279 panic("Trying to determine size of invalid type");
282 static ir_node *get_vla_size(array_type_t *const type)
284 ir_node *size_node = type->size_node;
285 if (size_node == NULL) {
286 size_node = expression_to_firm(type->size_expression);
287 type->size_node = size_node;
292 static ir_node *get_type_size(type_t *type)
294 type = skip_typeref(type);
296 if (is_type_array(type) && type->array.is_vla) {
297 ir_node *size_node = get_vla_size(&type->array);
298 ir_node *elem_size = get_type_size(type->array.element_type);
299 ir_mode *mode = get_irn_mode(size_node);
300 ir_node *real_size = new_d_Mul(NULL, size_node, elem_size, mode);
304 ir_mode *mode = get_ir_mode(type_size_t);
306 sym.type_p = get_ir_type(type);
307 return new_SymConst(mode, sym, symconst_type_size);
310 static unsigned count_parameters(const function_type_t *function_type)
314 function_parameter_t *parameter = function_type->parameters;
315 for ( ; parameter != NULL; parameter = parameter->next) {
323 * Creates a Firm type for an atomic type
325 static ir_type *create_atomic_type(const atomic_type_t *type)
327 atomic_type_kind_t kind = type->akind;
328 ir_mode *mode = atomic_modes[kind];
329 ident *id = get_mode_ident(mode);
330 ir_type *irtype = new_type_primitive(id, mode);
332 set_type_alignment_bytes(irtype, type->base.alignment);
338 * Creates a Firm type for a complex type
340 static ir_type *create_complex_type(const complex_type_t *type)
342 atomic_type_kind_t kind = type->akind;
343 ir_mode *mode = atomic_modes[kind];
344 ident *id = get_mode_ident(mode);
348 /* FIXME: finish the array */
353 * Creates a Firm type for an imaginary type
355 static ir_type *create_imaginary_type(const imaginary_type_t *type)
357 atomic_type_kind_t kind = type->akind;
358 ir_mode *mode = atomic_modes[kind];
359 ident *id = get_mode_ident(mode);
360 ir_type *irtype = new_type_primitive(id, mode);
362 set_type_alignment_bytes(irtype, type->base.alignment);
368 * return type of a parameter (and take transparent union gnu extension into
371 static type_t *get_parameter_type(type_t *type)
373 type = skip_typeref(type);
374 if (type->base.modifiers & TYPE_MODIFIER_TRANSPARENT_UNION) {
375 compound_t *compound = type->compound.compound;
376 type = compound->members.entities->declaration.type;
382 static ir_type *create_method_type(const function_type_t *function_type)
384 type_t *return_type = skip_typeref(function_type->return_type);
386 ident *id = id_unique("functiontype.%u");
387 int n_parameters = count_parameters(function_type);
388 int n_results = return_type == type_void ? 0 : 1;
389 ir_type *irtype = new_type_method(id, n_parameters, n_results);
391 if (return_type != type_void) {
392 ir_type *restype = get_ir_type(return_type);
393 set_method_res_type(irtype, 0, restype);
396 function_parameter_t *parameter = function_type->parameters;
398 for ( ; parameter != NULL; parameter = parameter->next) {
399 type_t *type = get_parameter_type(parameter->type);
400 ir_type *p_irtype = get_ir_type(type);
401 set_method_param_type(irtype, n, p_irtype);
405 if (function_type->variadic || function_type->unspecified_parameters) {
406 set_method_variadicity(irtype, variadicity_variadic);
409 unsigned cc = get_method_calling_convention(irtype);
410 switch (function_type->calling_convention) {
411 case CC_DEFAULT: /* unspecified calling convention, equal to one of the other, typically cdecl */
414 set_method_calling_convention(irtype, SET_CDECL(cc));
418 if (function_type->variadic || function_type->unspecified_parameters)
421 /* only non-variadic function can use stdcall, else use cdecl */
422 set_method_calling_convention(irtype, SET_STDCALL(cc));
426 if (function_type->variadic || function_type->unspecified_parameters)
428 /* only non-variadic function can use fastcall, else use cdecl */
429 set_method_calling_convention(irtype, SET_FASTCALL(cc));
433 /* Hmm, leave default, not accepted by the parser yet. */
440 static ir_type *create_pointer_type(pointer_type_t *type)
442 type_t *points_to = type->points_to;
443 ir_type *ir_points_to = get_ir_type_incomplete(points_to);
444 ir_type *ir_type = new_type_pointer(id_unique("pointer.%u"),
445 ir_points_to, mode_P_data);
450 static ir_type *create_reference_type(reference_type_t *type)
452 type_t *refers_to = type->refers_to;
453 ir_type *ir_refers_to = get_ir_type_incomplete(refers_to);
454 ir_type *ir_type = new_type_pointer(id_unique("reference.%u"),
455 ir_refers_to, mode_P_data);
460 static ir_type *create_array_type(array_type_t *type)
462 type_t *element_type = type->element_type;
463 ir_type *ir_element_type = get_ir_type(element_type);
465 ident *id = id_unique("array.%u");
466 ir_type *ir_type = new_type_array(id, 1, ir_element_type);
468 const int align = get_type_alignment_bytes(ir_element_type);
469 set_type_alignment_bytes(ir_type, align);
471 if (type->size_constant) {
472 int n_elements = type->size;
474 set_array_bounds_int(ir_type, 0, 0, n_elements);
476 size_t elemsize = get_type_size_bytes(ir_element_type);
477 if (elemsize % align > 0) {
478 elemsize += align - (elemsize % align);
480 set_type_size_bytes(ir_type, n_elements * elemsize);
482 set_array_lower_bound_int(ir_type, 0, 0);
484 set_type_state(ir_type, layout_fixed);
490 * Return the signed integer type of size bits.
492 * @param size the size
494 static ir_type *get_signed_int_type_for_bit_size(ir_type *base_tp,
497 static ir_mode *s_modes[64 + 1] = {NULL, };
501 if (size <= 0 || size > 64)
504 mode = s_modes[size];
508 snprintf(name, sizeof(name), "bf_I%u", size);
509 mode = new_ir_mode(name, irms_int_number, size, 1, irma_twos_complement,
510 size <= 32 ? 32 : size );
511 s_modes[size] = mode;
515 snprintf(name, sizeof(name), "I%u", size);
516 ident *id = new_id_from_str(name);
517 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
518 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
519 set_primitive_base_type(res, base_tp);
525 * Return the unsigned integer type of size bits.
527 * @param size the size
529 static ir_type *get_unsigned_int_type_for_bit_size(ir_type *base_tp,
532 static ir_mode *u_modes[64 + 1] = {NULL, };
536 if (size <= 0 || size > 64)
539 mode = u_modes[size];
543 snprintf(name, sizeof(name), "bf_U%u", size);
544 mode = new_ir_mode(name, irms_int_number, size, 0, irma_twos_complement,
545 size <= 32 ? 32 : size );
546 u_modes[size] = mode;
551 snprintf(name, sizeof(name), "U%u", size);
552 ident *id = new_id_from_str(name);
553 dbg_info *dbgi = get_dbg_info(&builtin_source_position);
554 res = new_d_type_primitive(id_mangle_u(get_type_ident(base_tp), id), mode, dbgi);
555 set_primitive_base_type(res, base_tp);
560 static ir_type *create_bitfield_type(bitfield_type_t *const type)
562 type_t *base = skip_typeref(type->base_type);
563 assert(base->kind == TYPE_ATOMIC || base->kind == TYPE_ENUM);
564 ir_type *irbase = get_ir_type(base);
566 unsigned size = type->bit_size;
568 assert(!is_type_float(base));
569 if (is_type_signed(base)) {
570 return get_signed_int_type_for_bit_size(irbase, size);
572 return get_unsigned_int_type_for_bit_size(irbase, size);
576 #define INVALID_TYPE ((ir_type_ptr)-1)
579 COMPOUND_IS_STRUCT = false,
580 COMPOUND_IS_UNION = true
584 * Construct firm type from ast struct type.
586 * As anonymous inner structs get flattened to a single firm type, we might get
587 * irtype, outer_offset and out_align passed (they represent the position of
588 * the anonymous inner struct inside the resulting firm struct)
590 static ir_type *create_compound_type(compound_type_t *type, ir_type *irtype,
591 size_t *outer_offset, size_t *outer_align,
592 bool incomplete, bool is_union)
594 compound_t *compound = type->compound;
596 if (compound->irtype != NULL && (compound->irtype_complete || incomplete)) {
597 return compound->irtype;
600 size_t align_all = 1;
602 size_t bit_offset = 0;
605 if (irtype == NULL) {
606 symbol_t *symbol = compound->base.symbol;
608 if (symbol != NULL) {
609 id = new_id_from_str(symbol->string);
612 id = id_unique("__anonymous_union.%u");
614 id = id_unique("__anonymous_struct.%u");
617 dbg_info *dbgi = get_dbg_info(&compound->base.source_position);
620 irtype = new_d_type_union(id, dbgi);
622 irtype = new_d_type_struct(id, dbgi);
625 compound->irtype_complete = false;
626 compound->irtype = irtype;
628 offset = *outer_offset;
629 align_all = *outer_align;
635 compound->irtype_complete = true;
637 entity_t *entry = compound->members.entities;
638 for ( ; entry != NULL; entry = entry->base.next) {
639 if (entry->kind != ENTITY_COMPOUND_MEMBER)
642 size_t prev_offset = offset;
644 symbol_t *symbol = entry->base.symbol;
645 type_t *entry_type = skip_typeref(entry->declaration.type);
646 dbg_info *dbgi = get_dbg_info(&entry->base.source_position);
649 if (symbol != NULL) {
650 ident = new_id_from_str(symbol->string);
652 if (entry_type->kind == TYPE_COMPOUND_STRUCT) {
653 create_compound_type(&entry_type->compound, irtype, &offset,
654 &align_all, false, COMPOUND_IS_STRUCT);
655 goto finished_member;
656 } else if (entry_type->kind == TYPE_COMPOUND_UNION) {
657 create_compound_type(&entry_type->compound, irtype, &offset,
658 &align_all, false, COMPOUND_IS_UNION);
659 goto finished_member;
661 assert(entry_type->kind == TYPE_BITFIELD);
663 ident = id_unique("anon.%u");
666 ir_type *base_irtype;
667 if (entry_type->kind == TYPE_BITFIELD) {
668 base_irtype = get_ir_type(entry_type->bitfield.base_type);
670 base_irtype = get_ir_type(entry_type);
673 size_t entry_alignment = get_type_alignment_bytes(base_irtype);
674 size_t misalign = offset % entry_alignment;
676 ir_type *entry_irtype = get_ir_type(entry_type);
677 ir_entity *entity = new_d_entity(irtype, ident, entry_irtype, dbgi);
680 size_t bits_remainder;
681 if (entry_type->kind == TYPE_BITFIELD) {
682 size_t size_bits = entry_type->bitfield.bit_size;
683 size_t rest_size_bits = (entry_alignment - misalign)*8 - bit_offset;
685 if (size_bits > rest_size_bits) {
686 /* start a new bucket */
687 offset += entry_alignment - misalign;
693 /* put into current bucket */
694 base = offset - misalign;
695 bits_remainder = misalign * 8 + bit_offset;
698 offset += size_bits / 8;
699 bit_offset = bit_offset + (size_bits % 8);
701 size_t entry_size = get_type_size_bytes(base_irtype);
702 if (misalign > 0 || bit_offset > 0)
703 offset += entry_alignment - misalign;
707 offset += entry_size;
711 if (entry_alignment > align_all) {
712 if (entry_alignment % align_all != 0) {
713 panic("uneven alignments not supported yet");
715 align_all = entry_alignment;
718 set_entity_offset(entity, base);
719 set_entity_offset_bits_remainder(entity,
720 (unsigned char) bits_remainder);
721 //add_struct_member(irtype, entity);
722 entry->declaration.kind = DECLARATION_KIND_COMPOUND_MEMBER;
723 assert(entry->compound_member.entity == NULL);
724 entry->compound_member.entity = entity;
728 size_t entry_size = offset - prev_offset;
729 if (entry_size > size) {
741 size_t misalign = offset % align_all;
742 if (misalign > 0 || bit_offset > 0) {
743 size += align_all - misalign;
746 if (outer_offset != NULL) {
748 *outer_offset = offset;
750 *outer_offset += size;
753 if (align_all > *outer_align) {
754 if (align_all % *outer_align != 0) {
755 panic("uneven alignments not supported yet");
757 *outer_align = align_all;
760 set_type_alignment_bytes(irtype, align_all);
761 set_type_size_bytes(irtype, size);
762 set_type_state(irtype, layout_fixed);
768 static ir_type *create_enum_type(enum_type_t *const type)
770 type->base.firm_type = ir_type_int;
772 ir_mode *const mode = mode_int;
773 tarval *const one = get_mode_one(mode);
774 tarval * tv_next = get_tarval_null(mode);
776 bool constant_folding_old = constant_folding;
777 constant_folding = true;
779 enum_t *enume = type->enume;
780 entity_t *entry = enume->base.next;
781 for (; entry != NULL; entry = entry->base.next) {
782 if (entry->kind != ENTITY_ENUM_VALUE)
785 expression_t *const init = entry->enum_value.value;
787 ir_node *const cnst = expression_to_firm(init);
788 if (!is_Const(cnst)) {
789 panic("couldn't fold constant");
791 tv_next = get_Const_tarval(cnst);
793 entry->enum_value.tv = tv_next;
794 tv_next = tarval_add(tv_next, one);
797 constant_folding = constant_folding_old;
802 static ir_type *get_ir_type_incomplete(type_t *type)
804 assert(type != NULL);
805 type = skip_typeref(type);
807 if (type->base.firm_type != NULL) {
808 assert(type->base.firm_type != INVALID_TYPE);
809 return type->base.firm_type;
812 switch (type->kind) {
813 case TYPE_COMPOUND_STRUCT:
814 return create_compound_type(&type->compound, NULL, NULL, NULL,
815 true, COMPOUND_IS_STRUCT);
816 case TYPE_COMPOUND_UNION:
817 return create_compound_type(&type->compound, NULL, NULL, NULL,
818 true, COMPOUND_IS_UNION);
820 return get_ir_type(type);
824 ir_type *get_ir_type(type_t *type)
826 assert(type != NULL);
828 type = skip_typeref(type);
830 if (type->base.firm_type != NULL) {
831 assert(type->base.firm_type != INVALID_TYPE);
832 return type->base.firm_type;
835 ir_type *firm_type = NULL;
836 switch (type->kind) {
838 /* Happens while constant folding, when there was an error */
839 return create_atomic_type(&type_void->atomic);
842 firm_type = create_atomic_type(&type->atomic);
845 firm_type = create_complex_type(&type->complex);
848 firm_type = create_imaginary_type(&type->imaginary);
851 firm_type = create_method_type(&type->function);
854 firm_type = create_pointer_type(&type->pointer);
857 firm_type = create_reference_type(&type->reference);
860 firm_type = create_array_type(&type->array);
862 case TYPE_COMPOUND_STRUCT:
863 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
864 false, COMPOUND_IS_STRUCT);
866 case TYPE_COMPOUND_UNION:
867 firm_type = create_compound_type(&type->compound, NULL, NULL, NULL,
868 false, COMPOUND_IS_UNION);
871 firm_type = create_enum_type(&type->enumt);
874 firm_type = get_ir_type(type->builtin.real_type);
877 firm_type = create_bitfield_type(&type->bitfield);
885 if (firm_type == NULL)
886 panic("unknown type found");
888 type->base.firm_type = firm_type;
892 ir_mode *get_ir_mode(type_t *type)
894 ir_type *irtype = get_ir_type(type);
896 /* firm doesn't report a mode for arrays somehow... */
897 if (is_Array_type(irtype)) {
901 ir_mode *mode = get_type_mode(irtype);
902 assert(mode != NULL);
906 /** Names of the runtime functions. */
907 static const struct {
908 int id; /**< the rts id */
909 int n_res; /**< number of return values */
910 const char *name; /**< the name of the rts function */
911 int n_params; /**< number of parameters */
912 unsigned flags; /**< language flags */
914 { rts_debugbreak, 0, "__debugbreak", 0, _MS },
915 { rts_abort, 0, "abort", 0, _C89 },
916 { rts_alloca, 1, "alloca", 1, _ALL },
917 { rts_abs, 1, "abs", 1, _C89 },
918 { rts_labs, 1, "labs", 1, _C89 },
919 { rts_llabs, 1, "llabs", 1, _C99 },
920 { rts_imaxabs, 1, "imaxabs", 1, _C99 },
922 { rts_fabs, 1, "fabs", 1, _C89 },
923 { rts_sqrt, 1, "sqrt", 1, _C89 },
924 { rts_cbrt, 1, "cbrt", 1, _C99 },
925 { rts_exp, 1, "exp", 1, _C89 },
926 { rts_exp2, 1, "exp2", 1, _C89 },
927 { rts_exp10, 1, "exp10", 1, _GNUC },
928 { rts_log, 1, "log", 1, _C89 },
929 { rts_log2, 1, "log2", 1, _C89 },
930 { rts_log10, 1, "log10", 1, _C89 },
931 { rts_pow, 1, "pow", 2, _C89 },
932 { rts_sin, 1, "sin", 1, _C89 },
933 { rts_cos, 1, "cos", 1, _C89 },
934 { rts_tan, 1, "tan", 1, _C89 },
935 { rts_asin, 1, "asin", 1, _C89 },
936 { rts_acos, 1, "acos", 1, _C89 },
937 { rts_atan, 1, "atan", 1, _C89 },
938 { rts_sinh, 1, "sinh", 1, _C89 },
939 { rts_cosh, 1, "cosh", 1, _C89 },
940 { rts_tanh, 1, "tanh", 1, _C89 },
942 { rts_fabsf, 1, "fabsf", 1, _C99 },
943 { rts_sqrtf, 1, "sqrtf", 1, _C99 },
944 { rts_cbrtf, 1, "cbrtf", 1, _C99 },
945 { rts_expf, 1, "expf", 1, _C99 },
946 { rts_exp2f, 1, "exp2f", 1, _C99 },
947 { rts_exp10f, 1, "exp10f", 1, _GNUC },
948 { rts_logf, 1, "logf", 1, _C99 },
949 { rts_log2f, 1, "log2f", 1, _C99 },
950 { rts_log10f, 1, "log10f", 1, _C99 },
951 { rts_powf, 1, "powf", 2, _C99 },
952 { rts_sinf, 1, "sinf", 1, _C99 },
953 { rts_cosf, 1, "cosf", 1, _C99 },
954 { rts_tanf, 1, "tanf", 1, _C99 },
955 { rts_asinf, 1, "asinf", 1, _C99 },
956 { rts_acosf, 1, "acosf", 1, _C99 },
957 { rts_atanf, 1, "atanf", 1, _C99 },
958 { rts_sinhf, 1, "sinhf", 1, _C99 },
959 { rts_coshf, 1, "coshf", 1, _C99 },
960 { rts_tanhf, 1, "tanhf", 1, _C99 },
962 { rts_fabsl, 1, "fabsl", 1, _C99 },
963 { rts_sqrtl, 1, "sqrtl", 1, _C99 },
964 { rts_cbrtl, 1, "cbrtl", 1, _C99 },
965 { rts_expl, 1, "expl", 1, _C99 },
966 { rts_exp2l, 1, "exp2l", 1, _C99 },
967 { rts_exp10l, 1, "exp10l", 1, _GNUC },
968 { rts_logl, 1, "logl", 1, _C99 },
969 { rts_log2l, 1, "log2l", 1, _C99 },
970 { rts_log10l, 1, "log10l", 1, _C99 },
971 { rts_powl, 1, "powl", 2, _C99 },
972 { rts_sinl, 1, "sinl", 1, _C99 },
973 { rts_cosl, 1, "cosl", 1, _C99 },
974 { rts_tanl, 1, "tanl", 1, _C99 },
975 { rts_asinl, 1, "asinl", 1, _C99 },
976 { rts_acosl, 1, "acosl", 1, _C99 },
977 { rts_atanl, 1, "atanl", 1, _C99 },
978 { rts_sinhl, 1, "sinhl", 1, _C99 },
979 { rts_coshl, 1, "coshl", 1, _C99 },
980 { rts_tanhl, 1, "tanhl", 1, _C99 },
982 { rts_memcpy, 1, "memcpy", 3, _C89 }, /* HMM, man say its C99 */
983 { rts_memset, 1, "memset", 3, _C89 }, /* HMM, man say its C99 */
984 { rts_strcmp, 1, "strcmp", 2, _C89 },
985 { rts_strncmp, 1, "strncmp", 3, _C89 }
988 static ident *rts_idents[sizeof(rts_data) / sizeof(rts_data[0])];
990 static ident* (*create_ld_ident)(entity_t*) = create_name_linux_elf;
993 * Handle GNU attributes for entities
995 * @param ent the entity
996 * @param decl the routine declaration
998 static void handle_gnu_attributes_ent(ir_entity *irentity, entity_t *entity)
1000 assert(is_declaration(entity));
1001 decl_modifiers_t modifiers = entity->declaration.modifiers;
1002 if (modifiers & DM_PURE) {
1003 /* TRUE if the declaration includes the GNU
1004 __attribute__((pure)) specifier. */
1005 set_entity_additional_property(irentity, mtp_property_pure);
1007 if (modifiers & DM_CONST) {
1008 set_entity_additional_property(irentity, mtp_property_const);
1009 have_const_functions = true;
1011 if (modifiers & DM_USED) {
1012 /* TRUE if the declaration includes the GNU
1013 __attribute__((used)) specifier. */
1014 set_entity_stickyness(irentity, stickyness_sticky);
1018 static bool is_main(entity_t *entity)
1020 static symbol_t *sym_main = NULL;
1021 if (sym_main == NULL) {
1022 sym_main = symbol_table_insert("main");
1025 if (entity->base.symbol != sym_main)
1027 /* must be in outermost scope */
1028 if (entity->base.parent_scope != ¤t_translation_unit->scope)
1035 * Creates an entity representing a function.
1037 * @param declaration the function declaration
1039 static ir_entity *get_function_entity(entity_t *entity)
1041 assert(entity->kind == ENTITY_FUNCTION);
1042 if (entity->function.entity != NULL) {
1043 return entity->function.entity;
1046 if (is_main(entity)) {
1047 /* force main to C linkage */
1048 type_t *type = entity->declaration.type;
1049 assert(is_type_function(type));
1050 if (type->function.linkage != LINKAGE_C) {
1051 type_t *new_type = duplicate_type(type);
1052 new_type->function.linkage = LINKAGE_C;
1054 type = typehash_insert(new_type);
1055 if (type != new_type) {
1056 obstack_free(type_obst, new_type);
1058 entity->declaration.type = type;
1062 symbol_t *symbol = entity->base.symbol;
1063 ident *id = new_id_from_str(symbol->string);
1065 ir_type *global_type = get_glob_type();
1066 ir_type *ir_type_method = get_ir_type(entity->declaration.type);
1067 bool const has_body = entity->function.statement != NULL;
1069 /* already an entity defined? */
1070 ir_entity *irentity = entitymap_get(&entitymap, symbol);
1071 if (irentity != NULL) {
1072 if (get_entity_visibility(irentity) == visibility_external_allocated
1074 set_entity_visibility(irentity, visibility_external_visible);
1076 goto entity_created;
1079 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
1080 irentity = new_d_entity(global_type, id, ir_type_method, dbgi);
1081 set_entity_ld_ident(irentity, create_ld_ident(entity));
1083 handle_gnu_attributes_ent(irentity, entity);
1085 /* static inline => local
1086 * extern inline => local
1087 * inline without definition => local
1088 * inline with definition => external_visible */
1089 storage_class_tag_t const storage_class
1090 = (storage_class_tag_t) entity->declaration.storage_class;
1091 bool const is_inline = entity->function.is_inline;
1092 if (is_inline && storage_class == STORAGE_CLASS_NONE && has_body) {
1093 set_entity_visibility(irentity, visibility_external_visible);
1094 } else if (storage_class == STORAGE_CLASS_STATIC ||
1095 (is_inline && has_body)) {
1097 /* this entity was declared, but is defined nowhere */
1098 set_entity_peculiarity(irentity, peculiarity_description);
1100 set_entity_visibility(irentity, visibility_local);
1101 } else if (has_body) {
1102 set_entity_visibility(irentity, visibility_external_visible);
1104 set_entity_visibility(irentity, visibility_external_allocated);
1106 set_entity_allocation(irentity, allocation_static);
1108 /* We should check for file scope here, but as long as we compile C only
1109 this is not needed. */
1110 if (! firm_opt.freestanding) {
1111 /* check for a known runtime function */
1112 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
1113 if (id != rts_idents[i])
1116 /* ignore those rts functions not necessary needed for current mode */
1117 if ((c_mode & rts_data[i].flags) == 0)
1119 assert(rts_entities[rts_data[i].id] == NULL);
1120 rts_entities[rts_data[i].id] = irentity;
1124 entitymap_insert(&entitymap, symbol, irentity);
1127 entity->declaration.kind = DECLARATION_KIND_FUNCTION;
1128 entity->function.entity = irentity;
1134 * Creates a Const node representing a constant.
1136 static ir_node *const_to_firm(const const_expression_t *cnst)
1138 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1139 ir_mode *mode = get_ir_mode(cnst->base.type);
1144 if (mode_is_float(mode)) {
1145 tv = new_tarval_from_double(cnst->v.float_value, mode);
1147 if (mode_is_signed(mode)) {
1148 len = snprintf(buf, sizeof(buf), "%lld", cnst->v.int_value);
1150 len = snprintf(buf, sizeof(buf), "%llu",
1151 (unsigned long long) cnst->v.int_value);
1153 tv = new_tarval_from_str(buf, len, mode);
1156 return new_d_Const(dbgi, tv);
1160 * Creates a Const node representing a character constant.
1162 static ir_node *character_constant_to_firm(const const_expression_t *cnst)
1164 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1165 ir_mode *mode = get_ir_mode(cnst->base.type);
1167 long long int v = 0;
1168 for (size_t i = 0; i < cnst->v.character.size; ++i) {
1169 if (char_is_signed) {
1170 v = (v << 8) | ((signed char)cnst->v.character.begin[i]);
1172 v = (v << 8) | ((unsigned char)cnst->v.character.begin[i]);
1176 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1177 tarval *tv = new_tarval_from_str(buf, len, mode);
1179 return new_d_Const(dbgi, tv);
1183 * Creates a Const node representing a wide character constant.
1185 static ir_node *wide_character_constant_to_firm(const const_expression_t *cnst)
1187 dbg_info *dbgi = get_dbg_info(&cnst->base.source_position);
1188 ir_mode *mode = get_ir_mode(cnst->base.type);
1190 long long int v = cnst->v.wide_character.begin[0];
1193 size_t len = snprintf(buf, sizeof(buf), "%lld", v);
1194 tarval *tv = new_tarval_from_str(buf, len, mode);
1196 return new_d_Const(dbgi, tv);
1200 * Creates a SymConst for a given entity.
1202 * @param dbgi debug info
1203 * @param mode the (reference) mode for the SymConst
1204 * @param entity the entity
1206 static ir_node *create_symconst(dbg_info *dbgi, ir_mode *mode,
1209 assert(entity != NULL);
1210 union symconst_symbol sym;
1211 sym.entity_p = entity;
1212 return new_d_SymConst(dbgi, mode, sym, symconst_addr_ent);
1216 * Creates a SymConst node representing a string constant.
1218 * @param src_pos the source position of the string constant
1219 * @param id_prefix a prefix for the name of the generated string constant
1220 * @param value the value of the string constant
1222 static ir_node *string_to_firm(const source_position_t *const src_pos,
1223 const char *const id_prefix,
1224 const string_t *const value)
1226 ir_type *const global_type = get_glob_type();
1227 dbg_info *const dbgi = get_dbg_info(src_pos);
1228 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1229 ir_type_const_char, dbgi);
1231 ident *const id = id_unique(id_prefix);
1232 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1233 set_entity_ld_ident(entity, id);
1234 set_entity_variability(entity, variability_constant);
1235 set_entity_allocation(entity, allocation_static);
1237 ir_type *const elem_type = ir_type_const_char;
1238 ir_mode *const mode = get_type_mode(elem_type);
1240 const char* const string = value->begin;
1241 const size_t slen = value->size;
1243 set_array_lower_bound_int(type, 0, 0);
1244 set_array_upper_bound_int(type, 0, slen);
1245 set_type_size_bytes(type, slen);
1246 set_type_state(type, layout_fixed);
1248 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1249 for (size_t i = 0; i < slen; ++i) {
1250 tvs[i] = new_tarval_from_long(string[i], mode);
1253 set_array_entity_values(entity, tvs, slen);
1256 return create_symconst(dbgi, mode_P_data, entity);
1260 * Creates a SymConst node representing a string literal.
1262 * @param literal the string literal
1264 static ir_node *string_literal_to_firm(
1265 const string_literal_expression_t* literal)
1267 return string_to_firm(&literal->base.source_position, "Lstr.%u",
1272 * Creates a SymConst node representing a wide string literal.
1274 * @param literal the wide string literal
1276 static ir_node *wide_string_literal_to_firm(
1277 const wide_string_literal_expression_t* const literal)
1279 ir_type *const global_type = get_glob_type();
1280 ir_type *const elem_type = ir_type_wchar_t;
1281 dbg_info *const dbgi = get_dbg_info(&literal->base.source_position);
1282 ir_type *const type = new_d_type_array(id_unique("strtype.%u"), 1,
1285 ident *const id = id_unique("Lstr.%u");
1286 ir_entity *const entity = new_d_entity(global_type, id, type, dbgi);
1287 set_entity_ld_ident(entity, id);
1288 set_entity_variability(entity, variability_constant);
1289 set_entity_allocation(entity, allocation_static);
1291 ir_mode *const mode = get_type_mode(elem_type);
1293 const wchar_rep_t *const string = literal->value.begin;
1294 const size_t slen = literal->value.size;
1296 set_array_lower_bound_int(type, 0, 0);
1297 set_array_upper_bound_int(type, 0, slen);
1298 set_type_size_bytes(type, slen);
1299 set_type_state(type, layout_fixed);
1301 tarval **const tvs = xmalloc(slen * sizeof(tvs[0]));
1302 for (size_t i = 0; i < slen; ++i) {
1303 tvs[i] = new_tarval_from_long(string[i], mode);
1306 set_array_entity_values(entity, tvs, slen);
1309 return create_symconst(dbgi, mode_P_data, entity);
1312 static ir_node *deref_address(dbg_info *const dbgi, type_t *const type,
1313 ir_node *const addr)
1315 ir_type *irtype = get_ir_type(type);
1316 if (is_compound_type(irtype)
1317 || is_Method_type(irtype)
1318 || is_Array_type(irtype)) {
1322 ir_mode *const mode = get_type_mode(irtype);
1323 ir_node *const memory = get_store();
1324 ir_node *const load = new_d_Load(dbgi, memory, addr, mode);
1325 ir_node *const load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1326 ir_node *const load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1328 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE && !is_Bad(load)) {
1329 set_Load_volatility(load, volatility_is_volatile);
1332 set_store(load_mem);
1337 * Creates a strict Conv if neccessary.
1339 static ir_node *do_strict_conv(dbg_info *dbgi, ir_node *node)
1341 ir_mode *mode = get_irn_mode(node);
1343 if (!(get_irg_fp_model(current_ir_graph) & fp_explicit_rounding))
1345 if (!mode_is_float(mode))
1348 /* check if there is already a Conv */
1349 if (is_Conv(node)) {
1350 /* convert it into a strict Conv */
1351 set_Conv_strict(node, 1);
1355 /* otherwise create a new one */
1356 return new_d_strictConv(dbgi, node, mode);
1359 static ir_node *get_global_var_address(dbg_info *const dbgi,
1360 const entity_t *const entity)
1362 assert(entity->kind == ENTITY_VARIABLE);
1363 assert(entity->declaration.kind == DECLARATION_KIND_GLOBAL_VARIABLE);
1365 ir_entity *const irentity = entity->variable.v.entity;
1366 if (entity->variable.thread_local) {
1367 ir_node *const no_mem = new_NoMem();
1368 ir_node *const tls = get_irg_tls(current_ir_graph);
1369 return new_d_simpleSel(dbgi, no_mem, tls, irentity);
1371 return create_symconst(dbgi, mode_P_data, irentity);
1376 * Returns the correct base address depending on whether it is a parameter or a
1377 * normal local variable.
1379 static ir_node *get_local_frame(ir_entity *const ent)
1381 ir_graph *const irg = current_ir_graph;
1382 const ir_type *const owner = get_entity_owner(ent);
1383 if (owner == get_irg_frame_type(irg)) {
1384 return get_irg_frame(irg);
1386 assert(owner == get_method_value_param_type(get_entity_type(get_irg_entity(irg))));
1387 return get_irg_value_param_base(irg);
1391 static ir_node *create_conv(dbg_info *dbgi, ir_node *value, ir_mode *dest_mode)
1393 ir_mode *value_mode = get_irn_mode(value);
1395 if (value_mode == dest_mode || is_Bad(value))
1398 if (dest_mode == mode_b) {
1399 ir_node *zero = new_Const(get_mode_null(value_mode));
1400 ir_node *cmp = new_d_Cmp(dbgi, value, zero);
1401 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pn_Cmp_Lg);
1405 return new_d_Conv(dbgi, value, dest_mode);
1409 * Keep all memory edges of the given block.
1411 static void keep_all_memory(ir_node *block) {
1412 ir_node *old = get_cur_block();
1414 set_cur_block(block);
1415 keep_alive(get_store());
1416 /* TODO: keep all memory edges from restricted pointers */
1420 static ir_node *reference_expression_enum_value_to_firm(
1421 const reference_expression_t *ref)
1423 entity_t *entity = ref->entity;
1424 type_t *type = skip_typeref(entity->enum_value.enum_type);
1425 /* make sure the type is constructed */
1426 (void) get_ir_type(type);
1428 return new_Const(entity->enum_value.tv);
1431 static ir_node *reference_expression_to_firm(const reference_expression_t *ref)
1433 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1434 entity_t *entity = ref->entity;
1435 assert(is_declaration(entity));
1436 type_t *type = skip_typeref(entity->declaration.type);
1438 /* make sure the type is constructed */
1439 (void) get_ir_type(type);
1441 switch ((declaration_kind_t) entity->declaration.kind) {
1442 case DECLARATION_KIND_UNKNOWN:
1445 case DECLARATION_KIND_LOCAL_VARIABLE: {
1446 ir_mode *const mode = get_ir_mode(type);
1447 return get_value(entity->variable.v.value_number, mode);
1449 case DECLARATION_KIND_PARAMETER: {
1450 ir_mode *const mode = get_ir_mode(type);
1451 return get_value(entity->parameter.v.value_number, mode);
1453 case DECLARATION_KIND_FUNCTION: {
1454 ir_mode *const mode = get_ir_mode(type);
1455 return create_symconst(dbgi, mode, entity->function.entity);
1457 case DECLARATION_KIND_INNER_FUNCTION: {
1458 ir_mode *const mode = get_ir_mode(type);
1459 if (!entity->function.goto_to_outer && !entity->function.need_closure) {
1460 /* inner function not using the closure */
1461 return create_symconst(dbgi, mode, entity->function.entity);
1463 /* TODO: need trampoline here */
1464 panic("Trampoline code not implemented");
1465 return create_symconst(dbgi, mode, entity->function.entity);
1468 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1469 ir_node *const addr = get_global_var_address(dbgi, entity);
1470 return deref_address(dbgi, entity->declaration.type, addr);
1473 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY: {
1474 ir_entity *irentity = entity->variable.v.entity;
1475 ir_node *frame = get_local_frame(irentity);
1476 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1477 return deref_address(dbgi, entity->declaration.type, sel);
1479 case DECLARATION_KIND_PARAMETER_ENTITY: {
1480 ir_entity *irentity = entity->parameter.v.entity;
1481 ir_node *frame = get_local_frame(irentity);
1482 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1483 return deref_address(dbgi, entity->declaration.type, sel);
1486 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1487 return entity->variable.v.vla_base;
1489 case DECLARATION_KIND_COMPOUND_MEMBER:
1490 panic("not implemented reference type");
1493 panic("reference to declaration with unknown type found");
1496 static ir_node *reference_addr(const reference_expression_t *ref)
1498 dbg_info *dbgi = get_dbg_info(&ref->base.source_position);
1499 entity_t *entity = ref->entity;
1500 assert(is_declaration(entity));
1502 switch((declaration_kind_t) entity->declaration.kind) {
1503 case DECLARATION_KIND_UNKNOWN:
1505 case DECLARATION_KIND_PARAMETER:
1506 case DECLARATION_KIND_LOCAL_VARIABLE:
1507 /* you can store to a local variable (so we don't panic but return NULL
1508 * as an indicator for no real address) */
1510 case DECLARATION_KIND_GLOBAL_VARIABLE: {
1511 ir_node *const addr = get_global_var_address(dbgi, entity);
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);
1521 case DECLARATION_KIND_PARAMETER_ENTITY: {
1522 ir_entity *irentity = entity->parameter.v.entity;
1523 ir_node *frame = get_local_frame(irentity);
1524 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, irentity);
1529 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
1530 return entity->variable.v.vla_base;
1532 case DECLARATION_KIND_FUNCTION: {
1533 type_t *const type = skip_typeref(entity->declaration.type);
1534 ir_mode *const mode = get_ir_mode(type);
1535 return create_symconst(dbgi, mode, entity->function.entity);
1538 case DECLARATION_KIND_INNER_FUNCTION:
1539 case DECLARATION_KIND_COMPOUND_MEMBER:
1540 panic("not implemented reference type");
1543 panic("reference to declaration with unknown type found");
1547 * Transform calls to builtin functions.
1549 static ir_node *process_builtin_call(const call_expression_t *call)
1551 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1553 assert(call->function->kind == EXPR_BUILTIN_SYMBOL);
1554 builtin_symbol_expression_t *builtin = &call->function->builtin_symbol;
1556 type_t *type = skip_typeref(builtin->base.type);
1557 assert(is_type_pointer(type));
1559 type_t *function_type = skip_typeref(type->pointer.points_to);
1560 symbol_t *symbol = builtin->symbol;
1562 switch(symbol->ID) {
1563 case T___builtin_alloca: {
1564 if (call->arguments == NULL || call->arguments->next != NULL) {
1565 panic("invalid number of parameters on __builtin_alloca");
1567 expression_t *argument = call->arguments->expression;
1568 ir_node *size = expression_to_firm(argument);
1570 ir_node *store = get_store();
1571 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1573 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1575 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1580 case T___builtin_huge_val:
1581 case T___builtin_inf:
1582 case T___builtin_inff:
1583 case T___builtin_infl: {
1584 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1585 tarval *tv = get_mode_infinite(mode);
1586 ir_node *res = new_d_Const(dbgi, tv);
1589 case T___builtin_nan:
1590 case T___builtin_nanf:
1591 case T___builtin_nanl: {
1592 /* Ignore string for now... */
1593 assert(is_type_function(function_type));
1594 ir_mode *mode = get_ir_mode(function_type->function.return_type);
1595 tarval *tv = get_mode_NAN(mode);
1596 ir_node *res = new_d_Const(dbgi, tv);
1599 case T___builtin_expect: {
1600 expression_t *argument = call->arguments->expression;
1601 return _expression_to_firm(argument);
1603 case T___builtin_va_end:
1604 /* evaluate the argument of va_end for its side effects */
1605 _expression_to_firm(call->arguments->expression);
1608 panic("unsupported builtin found");
1613 * Transform a call expression.
1614 * Handles some special cases, like alloca() calls, which must be resolved
1615 * BEFORE the inlines runs. Inlining routines calling alloca() is dangerous,
1616 * 176.gcc for instance might allocate 2GB instead of 256 MB if alloca is not
1619 static ir_node *call_expression_to_firm(const call_expression_t *call)
1621 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1622 assert(get_cur_block() != NULL);
1624 expression_t *function = call->function;
1625 if (function->kind == EXPR_BUILTIN_SYMBOL) {
1626 return process_builtin_call(call);
1628 if (function->kind == EXPR_REFERENCE) {
1629 const reference_expression_t *ref = &function->reference;
1630 entity_t *entity = ref->entity;
1632 if (entity->kind == ENTITY_FUNCTION
1633 && entity->function.entity == rts_entities[rts_alloca]) {
1634 /* handle alloca() call */
1635 expression_t *argument = call->arguments->expression;
1636 ir_node *size = expression_to_firm(argument);
1638 size = create_conv(dbgi, size, get_ir_mode(type_size_t));
1640 ir_node *store = get_store();
1641 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1642 ir_node *alloca = new_d_Alloc(dbgi, store, size, firm_unknown_type,
1644 ir_node *proj_m = new_Proj(alloca, mode_M, pn_Alloc_M);
1646 ir_node *res = new_Proj(alloca, mode_P_data, pn_Alloc_res);
1651 ir_node *callee = expression_to_firm(function);
1653 type_t *type = skip_typeref(function->base.type);
1654 assert(is_type_pointer(type));
1655 pointer_type_t *pointer_type = &type->pointer;
1656 type_t *points_to = skip_typeref(pointer_type->points_to);
1657 assert(is_type_function(points_to));
1658 function_type_t *function_type = &points_to->function;
1660 int n_parameters = 0;
1661 ir_type *ir_method_type = get_ir_type((type_t*) function_type);
1662 ir_type *new_method_type = NULL;
1663 if (function_type->variadic || function_type->unspecified_parameters) {
1664 const call_argument_t *argument = call->arguments;
1665 for ( ; argument != NULL; argument = argument->next) {
1669 /* we need to construct a new method type matching the call
1671 int n_res = get_method_n_ress(ir_method_type);
1672 dbg_info *dbgi = get_dbg_info(&call->base.source_position);
1673 new_method_type = new_d_type_method(id_unique("calltype.%u"),
1674 n_parameters, n_res, dbgi);
1675 set_method_calling_convention(new_method_type,
1676 get_method_calling_convention(ir_method_type));
1677 set_method_additional_properties(new_method_type,
1678 get_method_additional_properties(ir_method_type));
1679 set_method_variadicity(new_method_type,
1680 get_method_variadicity(ir_method_type));
1682 for (int i = 0; i < n_res; ++i) {
1683 set_method_res_type(new_method_type, i,
1684 get_method_res_type(ir_method_type, i));
1686 argument = call->arguments;
1687 for (int i = 0; i < n_parameters; ++i, argument = argument->next) {
1688 expression_t *expression = argument->expression;
1689 ir_type *irtype = get_ir_type(expression->base.type);
1690 set_method_param_type(new_method_type, i, irtype);
1692 ir_method_type = new_method_type;
1694 n_parameters = get_method_n_params(ir_method_type);
1697 ir_node *in[n_parameters];
1699 const call_argument_t *argument = call->arguments;
1700 for (int n = 0; n < n_parameters; ++n) {
1701 expression_t *expression = argument->expression;
1702 ir_node *arg_node = expression_to_firm(expression);
1704 arg_node = do_strict_conv(dbgi, arg_node);
1708 argument = argument->next;
1711 ir_node *store = get_store();
1712 ir_node *node = new_d_Call(dbgi, store, callee, n_parameters, in,
1714 ir_node *mem = new_d_Proj(dbgi, node, mode_M, pn_Call_M_regular);
1717 type_t *return_type = skip_typeref(function_type->return_type);
1718 ir_node *result = NULL;
1720 if (!is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
1722 if (is_type_scalar(return_type)) {
1723 mode = get_ir_mode(return_type);
1727 ir_node *resproj = new_d_Proj(dbgi, node, mode_T, pn_Call_T_result);
1728 result = new_d_Proj(dbgi, resproj, mode, 0);
1731 if (function->kind == EXPR_REFERENCE &&
1732 function->reference.entity->declaration.modifiers & DM_NORETURN) {
1733 /* A dead end: Keep the Call and the Block. Also place all further
1734 * nodes into a new and unreachable block. */
1736 keep_alive(get_cur_block());
1743 static void statement_to_firm(statement_t *statement);
1744 static ir_node *compound_statement_to_firm(compound_statement_t *compound);
1746 static ir_node *expression_to_addr(const expression_t *expression);
1747 static ir_node *create_condition_evaluation(const expression_t *expression,
1748 ir_node *true_block,
1749 ir_node *false_block);
1751 static void assign_value(dbg_info *dbgi, ir_node *addr, type_t *type,
1754 value = do_strict_conv(dbgi, value);
1756 ir_node *memory = get_store();
1758 if (is_type_scalar(type)) {
1759 ir_node *store = new_d_Store(dbgi, memory, addr, value);
1760 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1761 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE && !is_Bad(store))
1762 set_Store_volatility(store, volatility_is_volatile);
1763 set_store(store_mem);
1765 ir_type *irtype = get_ir_type(type);
1766 ir_node *copyb = new_d_CopyB(dbgi, memory, addr, value, irtype);
1767 ir_node *copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
1768 set_store(copyb_mem);
1772 static tarval *create_bitfield_mask(ir_mode *mode, int offset, int size)
1774 tarval *all_one = get_mode_all_one(mode);
1775 int mode_size = get_mode_size_bits(mode);
1777 assert(offset >= 0);
1779 assert(offset + size <= mode_size);
1780 if (size == mode_size) {
1784 long shiftr = get_mode_size_bits(mode) - size;
1785 long shiftl = offset;
1786 tarval *tv_shiftr = new_tarval_from_long(shiftr, mode_uint);
1787 tarval *tv_shiftl = new_tarval_from_long(shiftl, mode_uint);
1788 tarval *mask0 = tarval_shr(all_one, tv_shiftr);
1789 tarval *mask1 = tarval_shl(mask0, tv_shiftl);
1794 static void bitfield_store_to_firm(dbg_info *dbgi,
1795 ir_entity *entity, ir_node *addr, ir_node *value, bool set_volatile)
1797 ir_type *entity_type = get_entity_type(entity);
1798 ir_type *base_type = get_primitive_base_type(entity_type);
1799 assert(base_type != NULL);
1800 ir_mode *mode = get_type_mode(base_type);
1802 value = create_conv(dbgi, value, mode);
1804 /* kill upper bits of value and shift to right position */
1805 int bitoffset = get_entity_offset_bits_remainder(entity);
1806 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1808 tarval *mask = create_bitfield_mask(mode, 0, bitsize);
1809 ir_node *mask_node = new_d_Const(dbgi, mask);
1810 ir_node *value_masked = new_d_And(dbgi, value, mask_node, mode);
1811 tarval *shiftl = new_tarval_from_long(bitoffset, mode_uint);
1812 ir_node *shiftcount = new_d_Const(dbgi, shiftl);
1813 ir_node *value_maskshift = new_d_Shl(dbgi, value_masked, shiftcount, mode);
1815 /* load current value */
1816 ir_node *mem = get_store();
1817 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1818 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1819 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1820 tarval *shift_mask = create_bitfield_mask(mode, bitoffset, bitsize);
1821 tarval *inv_mask = tarval_not(shift_mask);
1822 ir_node *inv_mask_node = new_d_Const(dbgi, inv_mask);
1823 ir_node *load_res_masked = new_d_And(dbgi, load_res, inv_mask_node, mode);
1825 /* construct new value and store */
1826 ir_node *new_val = new_d_Or(dbgi, load_res_masked, value_maskshift, mode);
1827 ir_node *store = new_d_Store(dbgi, load_mem, addr, new_val);
1828 ir_node *store_mem = new_d_Proj(dbgi, store, mode_M, pn_Store_M);
1829 set_store(store_mem);
1833 set_Load_volatility(load, volatility_is_volatile);
1835 set_Store_volatility(store, volatility_is_volatile);
1839 static ir_node *bitfield_extract_to_firm(const select_expression_t *expression,
1842 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1843 type_t *type = expression->base.type;
1844 ir_mode *mode = get_ir_mode(type);
1845 ir_node *mem = get_store();
1846 ir_node *load = new_d_Load(dbgi, mem, addr, mode);
1847 ir_node *load_mem = new_d_Proj(dbgi, load, mode_M, pn_Load_M);
1848 ir_node *load_res = new_d_Proj(dbgi, load, mode, pn_Load_res);
1850 load_res = create_conv(dbgi, load_res, mode_int);
1852 set_store(load_mem);
1854 /* kill upper bits */
1855 assert(expression->compound_entry->kind == ENTITY_COMPOUND_MEMBER);
1856 ir_entity *entity = expression->compound_entry->compound_member.entity;
1857 int bitoffset = get_entity_offset_bits_remainder(entity);
1858 ir_type *entity_type = get_entity_type(entity);
1859 int bitsize = get_mode_size_bits(get_type_mode(entity_type));
1860 long shift_bitsl = machine_size - bitoffset - bitsize;
1861 assert(shift_bitsl >= 0);
1862 tarval *tvl = new_tarval_from_long(shift_bitsl, mode_uint);
1863 ir_node *countl = new_d_Const(dbgi, tvl);
1864 ir_node *shiftl = new_d_Shl(dbgi, load_res, countl, mode_int);
1866 long shift_bitsr = bitoffset + shift_bitsl;
1867 assert(shift_bitsr <= (long) machine_size);
1868 tarval *tvr = new_tarval_from_long(shift_bitsr, mode_uint);
1869 ir_node *countr = new_d_Const(dbgi, tvr);
1871 if (mode_is_signed(mode)) {
1872 shiftr = new_d_Shrs(dbgi, shiftl, countr, mode_int);
1874 shiftr = new_d_Shr(dbgi, shiftl, countr, mode_int);
1877 return create_conv(dbgi, shiftr, mode);
1880 /* make sure the selected compound type is constructed */
1881 static void construct_select_compound(const select_expression_t *expression)
1883 type_t *type = skip_typeref(expression->compound->base.type);
1884 if (is_type_pointer(type)) {
1885 type = type->pointer.points_to;
1887 (void) get_ir_type(type);
1890 static void set_value_for_expression_addr(const expression_t *expression,
1891 ir_node *value, ir_node *addr)
1893 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1894 value = do_strict_conv(dbgi, value);
1896 if (expression->kind == EXPR_REFERENCE) {
1897 const reference_expression_t *ref = &expression->reference;
1899 entity_t *entity = ref->entity;
1900 assert(is_declaration(entity));
1901 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1902 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1903 set_value(entity->variable.v.value_number, value);
1905 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1906 set_value(entity->parameter.v.value_number, value);
1912 addr = expression_to_addr(expression);
1913 assert(addr != NULL);
1915 type_t *type = skip_typeref(expression->base.type);
1917 if (expression->kind == EXPR_SELECT) {
1918 const select_expression_t *select = &expression->select;
1920 construct_select_compound(select);
1922 entity_t *entity = select->compound_entry;
1923 assert(entity->kind == ENTITY_COMPOUND_MEMBER);
1924 if (entity->declaration.type->kind == TYPE_BITFIELD) {
1925 ir_entity *irentity = entity->compound_member.entity;
1927 = select->base.type->base.qualifiers & TYPE_QUALIFIER_VOLATILE;
1928 bitfield_store_to_firm(dbgi, irentity, addr, value, set_volatile);
1933 assign_value(dbgi, addr, type, value);
1936 static void set_value_for_expression(const expression_t *expression,
1939 set_value_for_expression_addr(expression, value, NULL);
1942 static ir_node *get_value_from_lvalue(const expression_t *expression,
1945 if (expression->kind == EXPR_REFERENCE) {
1946 const reference_expression_t *ref = &expression->reference;
1948 entity_t *entity = ref->entity;
1949 assert(entity->kind == ENTITY_VARIABLE
1950 || entity->kind == ENTITY_PARAMETER);
1951 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
1952 if (entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE) {
1953 assert(addr == NULL);
1954 ir_mode *mode = get_ir_mode(expression->base.type);
1955 return get_value(entity->variable.v.value_number, mode);
1956 } else if (entity->declaration.kind == DECLARATION_KIND_PARAMETER) {
1957 assert(addr == NULL);
1958 ir_mode *mode = get_ir_mode(expression->base.type);
1959 return get_value(entity->parameter.v.value_number, mode);
1963 assert(addr != NULL);
1964 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
1967 if (expression->kind == EXPR_SELECT &&
1968 expression->select.compound_entry->declaration.type->kind == TYPE_BITFIELD){
1969 construct_select_compound(&expression->select);
1970 value = bitfield_extract_to_firm(&expression->select, addr);
1972 value = deref_address(dbgi, expression->base.type, addr);
1979 static ir_node *create_incdec(const unary_expression_t *expression)
1981 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
1982 const expression_t *value_expr = expression->value;
1983 ir_node *addr = expression_to_addr(value_expr);
1984 ir_node *value = get_value_from_lvalue(value_expr, addr);
1986 type_t *type = skip_typeref(expression->base.type);
1987 ir_mode *mode = get_ir_mode(expression->base.type);
1990 if (is_type_pointer(type)) {
1991 pointer_type_t *pointer_type = &type->pointer;
1992 offset = get_type_size(pointer_type->points_to);
1994 assert(is_type_arithmetic(type));
1995 offset = new_Const(get_mode_one(mode));
1999 ir_node *store_value;
2000 switch(expression->base.kind) {
2001 case EXPR_UNARY_POSTFIX_INCREMENT:
2003 store_value = new_d_Add(dbgi, value, offset, mode);
2005 case EXPR_UNARY_POSTFIX_DECREMENT:
2007 store_value = new_d_Sub(dbgi, value, offset, mode);
2009 case EXPR_UNARY_PREFIX_INCREMENT:
2010 result = new_d_Add(dbgi, value, offset, mode);
2011 store_value = result;
2013 case EXPR_UNARY_PREFIX_DECREMENT:
2014 result = new_d_Sub(dbgi, value, offset, mode);
2015 store_value = result;
2018 panic("no incdec expr in create_incdec");
2021 set_value_for_expression_addr(value_expr, store_value, addr);
2026 static bool is_local_variable(expression_t *expression)
2028 if (expression->kind != EXPR_REFERENCE)
2030 reference_expression_t *ref_expr = &expression->reference;
2031 entity_t *entity = ref_expr->entity;
2032 if (entity->kind != ENTITY_VARIABLE)
2034 assert(entity->declaration.kind != DECLARATION_KIND_UNKNOWN);
2035 return entity->declaration.kind == DECLARATION_KIND_LOCAL_VARIABLE;
2038 static pn_Cmp get_pnc(const expression_kind_t kind, type_t *const type)
2041 case EXPR_BINARY_EQUAL: return pn_Cmp_Eq;
2042 case EXPR_BINARY_ISLESSGREATER: return pn_Cmp_Lg;
2043 case EXPR_BINARY_NOTEQUAL:
2044 return is_type_float(skip_typeref(type)) ? pn_Cmp_Ne : pn_Cmp_Lg;
2045 case EXPR_BINARY_ISLESS:
2046 case EXPR_BINARY_LESS: return pn_Cmp_Lt;
2047 case EXPR_BINARY_ISLESSEQUAL:
2048 case EXPR_BINARY_LESSEQUAL: return pn_Cmp_Le;
2049 case EXPR_BINARY_ISGREATER:
2050 case EXPR_BINARY_GREATER: return pn_Cmp_Gt;
2051 case EXPR_BINARY_ISGREATEREQUAL:
2052 case EXPR_BINARY_GREATEREQUAL: return pn_Cmp_Ge;
2053 case EXPR_BINARY_ISUNORDERED: return pn_Cmp_Uo;
2058 panic("trying to get pn_Cmp from non-comparison binexpr type");
2062 * Handle the assume optimizer hint: check if a Confirm
2063 * node can be created.
2065 * @param dbi debug info
2066 * @param expr the IL assume expression
2068 * we support here only some simple cases:
2073 static ir_node *handle_assume_compare(dbg_info *dbi,
2074 const binary_expression_t *expression)
2076 expression_t *op1 = expression->left;
2077 expression_t *op2 = expression->right;
2078 entity_t *var2, *var = NULL;
2079 ir_node *res = NULL;
2082 cmp_val = get_pnc(expression->base.kind, op1->base.type);
2084 if (is_local_variable(op1) && is_local_variable(op2)) {
2085 var = op1->reference.entity;
2086 var2 = op2->reference.entity;
2088 type_t *const type = skip_typeref(var->declaration.type);
2089 ir_mode *const mode = get_ir_mode(type);
2091 ir_node *const irn1 = get_value(var->variable.v.value_number, mode);
2092 ir_node *const irn2 = get_value(var2->variable.v.value_number, mode);
2094 res = new_d_Confirm(dbi, irn2, irn1, get_inversed_pnc(cmp_val));
2095 set_value(var2->variable.v.value_number, res);
2097 res = new_d_Confirm(dbi, irn1, irn2, cmp_val);
2098 set_value(var->variable.v.value_number, res);
2104 if (is_local_variable(op1) && is_constant_expression(op2)) {
2105 var = op1->reference.entity;
2107 } else if (is_constant_expression(op1) && is_local_variable(op2)) {
2108 cmp_val = get_inversed_pnc(cmp_val);
2109 var = op2->reference.entity;
2114 type_t *const type = skip_typeref(var->declaration.type);
2115 ir_mode *const mode = get_ir_mode(type);
2117 res = get_value(var->variable.v.value_number, mode);
2118 res = new_d_Confirm(dbi, res, expression_to_firm(con), cmp_val);
2119 set_value(var->variable.v.value_number, res);
2125 * Handle the assume optimizer hint.
2127 * @param dbi debug info
2128 * @param expr the IL assume expression
2130 static ir_node *handle_assume(dbg_info *dbi, const expression_t *expression) {
2131 switch(expression->kind) {
2132 case EXPR_BINARY_EQUAL:
2133 case EXPR_BINARY_NOTEQUAL:
2134 case EXPR_BINARY_LESS:
2135 case EXPR_BINARY_LESSEQUAL:
2136 case EXPR_BINARY_GREATER:
2137 case EXPR_BINARY_GREATEREQUAL:
2138 return handle_assume_compare(dbi, &expression->binary);
2144 static ir_node *unary_expression_to_firm(const unary_expression_t *expression)
2146 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2147 type_t *type = skip_typeref(expression->base.type);
2149 if (expression->base.kind == EXPR_UNARY_TAKE_ADDRESS)
2150 return expression_to_addr(expression->value);
2152 const expression_t *value = expression->value;
2154 switch(expression->base.kind) {
2155 case EXPR_UNARY_NEGATE: {
2156 ir_node *value_node = expression_to_firm(value);
2157 ir_mode *mode = get_ir_mode(type);
2158 return new_d_Minus(dbgi, value_node, mode);
2160 case EXPR_UNARY_PLUS:
2161 return expression_to_firm(value);
2162 case EXPR_UNARY_BITWISE_NEGATE: {
2163 ir_node *value_node = expression_to_firm(value);
2164 ir_mode *mode = get_ir_mode(type);
2165 return new_d_Not(dbgi, value_node, mode);
2167 case EXPR_UNARY_NOT: {
2168 ir_node *value_node = _expression_to_firm(value);
2169 value_node = create_conv(dbgi, value_node, mode_b);
2170 ir_node *res = new_d_Not(dbgi, value_node, mode_b);
2173 case EXPR_UNARY_DEREFERENCE: {
2174 ir_node *value_node = expression_to_firm(value);
2175 type_t *value_type = skip_typeref(value->base.type);
2176 assert(is_type_pointer(value_type));
2177 type_t *points_to = value_type->pointer.points_to;
2178 return deref_address(dbgi, points_to, value_node);
2180 case EXPR_UNARY_POSTFIX_INCREMENT:
2181 case EXPR_UNARY_POSTFIX_DECREMENT:
2182 case EXPR_UNARY_PREFIX_INCREMENT:
2183 case EXPR_UNARY_PREFIX_DECREMENT:
2184 return create_incdec(expression);
2185 case EXPR_UNARY_CAST: {
2186 ir_node *value_node = expression_to_firm(value);
2187 if (is_type_scalar(type)) {
2188 ir_mode *mode = get_ir_mode(type);
2189 ir_node *node = create_conv(dbgi, value_node, mode);
2190 node = do_strict_conv(dbgi, node);
2193 /* make sure firm type is constructed */
2194 (void) get_ir_type(type);
2198 case EXPR_UNARY_CAST_IMPLICIT: {
2199 ir_node *value_node = expression_to_firm(value);
2200 if (is_type_scalar(type)) {
2201 ir_mode *mode = get_ir_mode(type);
2202 return create_conv(dbgi, value_node, mode);
2207 case EXPR_UNARY_ASSUME:
2208 if (firm_opt.confirm)
2209 return handle_assume(dbgi, value);
2216 panic("invalid UNEXPR type found");
2220 * produces a 0/1 depending of the value of a mode_b node
2222 static ir_node *produce_condition_result(const expression_t *expression,
2223 ir_mode *mode, dbg_info *dbgi)
2225 ir_node *cur_block = get_cur_block();
2227 ir_node *one_block = new_immBlock();
2228 ir_node *one = new_Const(get_mode_one(mode));
2229 ir_node *jmp_one = new_d_Jmp(dbgi);
2231 ir_node *zero_block = new_immBlock();
2232 ir_node *zero = new_Const(get_mode_null(mode));
2233 ir_node *jmp_zero = new_d_Jmp(dbgi);
2235 set_cur_block(cur_block);
2236 create_condition_evaluation(expression, one_block, zero_block);
2237 mature_immBlock(one_block);
2238 mature_immBlock(zero_block);
2240 ir_node *in_cf[2] = { jmp_one, jmp_zero };
2241 new_Block(2, in_cf);
2243 ir_node *in[2] = { one, zero };
2244 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2249 static ir_node *adjust_for_pointer_arithmetic(dbg_info *dbgi,
2250 ir_node *value, type_t *type)
2252 ir_mode *const mode = get_ir_mode(type_ptrdiff_t);
2253 assert(is_type_pointer(type));
2254 pointer_type_t *const pointer_type = &type->pointer;
2255 type_t *const points_to = skip_typeref(pointer_type->points_to);
2256 unsigned elem_size = get_type_size_const(points_to);
2258 value = create_conv(dbgi, value, mode);
2260 /* gcc extension: allow arithmetic with void * and function * */
2261 if ((elem_size == 0 && is_type_atomic(points_to, ATOMIC_TYPE_VOID)) ||
2262 is_type_function(points_to)) {
2266 assert(elem_size >= 1);
2270 ir_node *const cnst = new_Const_long(mode, (long)elem_size);
2271 ir_node *const mul = new_d_Mul(dbgi, value, cnst, mode);
2275 static ir_node *create_op(dbg_info *dbgi, const binary_expression_t *expression,
2276 ir_node *left, ir_node *right)
2279 type_t *type_left = skip_typeref(expression->left->base.type);
2280 type_t *type_right = skip_typeref(expression->right->base.type);
2282 expression_kind_t kind = expression->base.kind;
2285 case EXPR_BINARY_SHIFTLEFT:
2286 case EXPR_BINARY_SHIFTRIGHT:
2287 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2288 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2289 mode = get_irn_mode(left);
2290 right = create_conv(dbgi, right, mode_uint);
2293 case EXPR_BINARY_SUB:
2294 if (is_type_pointer(type_left) && is_type_pointer(type_right)) {
2295 const pointer_type_t *const ptr_type = &type_left->pointer;
2297 mode = get_ir_mode(expression->base.type);
2298 ir_node *const elem_size = get_type_size(ptr_type->points_to);
2299 ir_node *const conv_size = new_d_Conv(dbgi, elem_size, mode);
2300 ir_node *const sub = new_d_Sub(dbgi, left, right, mode);
2301 ir_node *const no_mem = new_NoMem();
2302 ir_node *const div = new_d_DivRL(dbgi, no_mem, sub, conv_size,
2303 mode, op_pin_state_floats);
2304 return new_d_Proj(dbgi, div, mode, pn_Div_res);
2307 case EXPR_BINARY_SUB_ASSIGN:
2308 if (is_type_pointer(type_left)) {
2309 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2310 mode = get_ir_mode(type_left);
2315 case EXPR_BINARY_ADD:
2316 case EXPR_BINARY_ADD_ASSIGN:
2317 if (is_type_pointer(type_left)) {
2318 right = adjust_for_pointer_arithmetic(dbgi, right, type_left);
2319 mode = get_ir_mode(type_left);
2321 } else if (is_type_pointer(type_right)) {
2322 left = adjust_for_pointer_arithmetic(dbgi, left, type_right);
2323 mode = get_ir_mode(type_right);
2330 mode = get_ir_mode(type_right);
2331 left = create_conv(dbgi, left, mode);
2336 case EXPR_BINARY_ADD_ASSIGN:
2337 case EXPR_BINARY_ADD:
2338 return new_d_Add(dbgi, left, right, mode);
2339 case EXPR_BINARY_SUB_ASSIGN:
2340 case EXPR_BINARY_SUB:
2341 return new_d_Sub(dbgi, left, right, mode);
2342 case EXPR_BINARY_MUL_ASSIGN:
2343 case EXPR_BINARY_MUL:
2344 return new_d_Mul(dbgi, left, right, mode);
2345 case EXPR_BINARY_BITWISE_AND:
2346 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2347 return new_d_And(dbgi, left, right, mode);
2348 case EXPR_BINARY_BITWISE_OR:
2349 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2350 return new_d_Or(dbgi, left, right, mode);
2351 case EXPR_BINARY_BITWISE_XOR:
2352 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2353 return new_d_Eor(dbgi, left, right, mode);
2354 case EXPR_BINARY_SHIFTLEFT:
2355 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2356 return new_d_Shl(dbgi, left, right, mode);
2357 case EXPR_BINARY_SHIFTRIGHT:
2358 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2359 if (mode_is_signed(mode)) {
2360 return new_d_Shrs(dbgi, left, right, mode);
2362 return new_d_Shr(dbgi, left, right, mode);
2364 case EXPR_BINARY_DIV:
2365 case EXPR_BINARY_DIV_ASSIGN: {
2366 ir_node *pin = new_Pin(new_NoMem());
2369 if (mode_is_float(mode)) {
2370 op = new_d_Quot(dbgi, pin, left, right, mode, op_pin_state_floats);
2371 res = new_d_Proj(dbgi, op, mode, pn_Quot_res);
2373 op = new_d_Div(dbgi, pin, left, right, mode, op_pin_state_floats);
2374 res = new_d_Proj(dbgi, op, mode, pn_Div_res);
2378 case EXPR_BINARY_MOD:
2379 case EXPR_BINARY_MOD_ASSIGN: {
2380 ir_node *pin = new_Pin(new_NoMem());
2381 assert(!mode_is_float(mode));
2382 ir_node *op = new_d_Mod(dbgi, pin, left, right, mode,
2383 op_pin_state_floats);
2384 ir_node *res = new_d_Proj(dbgi, op, mode, pn_Mod_res);
2388 panic("unexpected expression kind");
2392 static ir_node *create_lazy_op(const binary_expression_t *expression)
2394 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2395 type_t *type = expression->base.type;
2396 ir_mode *mode = get_ir_mode(type);
2398 if (is_constant_expression(expression->left)) {
2399 long val = fold_constant(expression->left);
2400 expression_kind_t ekind = expression->base.kind;
2401 assert(ekind == EXPR_BINARY_LOGICAL_AND || ekind == EXPR_BINARY_LOGICAL_OR);
2402 if (ekind == EXPR_BINARY_LOGICAL_AND) {
2404 return new_Const(get_mode_null(mode));
2408 return new_Const(get_mode_one(mode));
2412 if (is_constant_expression(expression->right)) {
2413 long const valr = fold_constant(expression->left);
2415 new_Const(get_mode_one(mode)) :
2416 new_Const(get_mode_null(mode));
2419 return produce_condition_result(expression->right, mode, dbgi);
2422 return produce_condition_result((const expression_t*) expression, mode,
2426 typedef ir_node * (*create_arithmetic_func)(dbg_info *dbgi, ir_node *left,
2427 ir_node *right, ir_mode *mode);
2429 static ir_node *create_assign_binop(const binary_expression_t *expression)
2431 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2432 const expression_t *left_expr = expression->left;
2433 ir_mode *left_mode = get_ir_mode(left_expr->base.type);
2434 ir_node *right = expression_to_firm(expression->right);
2435 ir_node *left_addr = expression_to_addr(left_expr);
2436 ir_node *left = get_value_from_lvalue(left_expr, left_addr);
2437 ir_node *result = create_op(dbgi, expression, left, right);
2439 result = create_conv(dbgi, result, left_mode);
2440 result = do_strict_conv(dbgi, result);
2442 set_value_for_expression_addr(left_expr, result, left_addr);
2447 static ir_node *binary_expression_to_firm(const binary_expression_t *expression)
2449 expression_kind_t kind = expression->base.kind;
2452 case EXPR_BINARY_EQUAL:
2453 case EXPR_BINARY_NOTEQUAL:
2454 case EXPR_BINARY_LESS:
2455 case EXPR_BINARY_LESSEQUAL:
2456 case EXPR_BINARY_GREATER:
2457 case EXPR_BINARY_GREATEREQUAL:
2458 case EXPR_BINARY_ISGREATER:
2459 case EXPR_BINARY_ISGREATEREQUAL:
2460 case EXPR_BINARY_ISLESS:
2461 case EXPR_BINARY_ISLESSEQUAL:
2462 case EXPR_BINARY_ISLESSGREATER:
2463 case EXPR_BINARY_ISUNORDERED: {
2464 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2465 ir_node *left = expression_to_firm(expression->left);
2466 ir_node *right = expression_to_firm(expression->right);
2467 ir_node *cmp = new_d_Cmp(dbgi, left, right);
2468 long pnc = get_pnc(kind, expression->left->base.type);
2469 ir_node *proj = new_d_Proj(dbgi, cmp, mode_b, pnc);
2472 case EXPR_BINARY_ASSIGN: {
2473 ir_node *addr = expression_to_addr(expression->left);
2474 ir_node *right = expression_to_firm(expression->right);
2475 set_value_for_expression_addr(expression->left, right, addr);
2479 case EXPR_BINARY_ADD:
2480 case EXPR_BINARY_SUB:
2481 case EXPR_BINARY_MUL:
2482 case EXPR_BINARY_DIV:
2483 case EXPR_BINARY_MOD:
2484 case EXPR_BINARY_BITWISE_AND:
2485 case EXPR_BINARY_BITWISE_OR:
2486 case EXPR_BINARY_BITWISE_XOR:
2487 case EXPR_BINARY_SHIFTLEFT:
2488 case EXPR_BINARY_SHIFTRIGHT:
2490 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2491 ir_node *left = expression_to_firm(expression->left);
2492 ir_node *right = expression_to_firm(expression->right);
2493 return create_op(dbgi, expression, left, right);
2495 case EXPR_BINARY_LOGICAL_AND:
2496 case EXPR_BINARY_LOGICAL_OR:
2497 return create_lazy_op(expression);
2498 case EXPR_BINARY_COMMA:
2499 /* create side effects of left side */
2500 (void) expression_to_firm(expression->left);
2501 return _expression_to_firm(expression->right);
2503 case EXPR_BINARY_ADD_ASSIGN:
2504 case EXPR_BINARY_SUB_ASSIGN:
2505 case EXPR_BINARY_MUL_ASSIGN:
2506 case EXPR_BINARY_MOD_ASSIGN:
2507 case EXPR_BINARY_DIV_ASSIGN:
2508 case EXPR_BINARY_BITWISE_AND_ASSIGN:
2509 case EXPR_BINARY_BITWISE_OR_ASSIGN:
2510 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
2511 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
2512 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
2513 return create_assign_binop(expression);
2515 panic("TODO binexpr type");
2519 static ir_node *array_access_addr(const array_access_expression_t *expression)
2521 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2522 ir_node *base_addr = expression_to_firm(expression->array_ref);
2523 ir_node *offset = expression_to_firm(expression->index);
2524 type_t *ref_type = skip_typeref(expression->array_ref->base.type);
2525 ir_node *real_offset = adjust_for_pointer_arithmetic(dbgi, offset, ref_type);
2526 ir_node *result = new_d_Add(dbgi, base_addr, real_offset, mode_P_data);
2531 static ir_node *array_access_to_firm(
2532 const array_access_expression_t *expression)
2534 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2535 ir_node *addr = array_access_addr(expression);
2536 type_t *type = revert_automatic_type_conversion(
2537 (const expression_t*) expression);
2538 type = skip_typeref(type);
2540 return deref_address(dbgi, type, addr);
2543 static long get_offsetof_offset(const offsetof_expression_t *expression)
2545 type_t *orig_type = expression->type;
2548 designator_t *designator = expression->designator;
2549 for ( ; designator != NULL; designator = designator->next) {
2550 type_t *type = skip_typeref(orig_type);
2551 /* be sure the type is constructed */
2552 (void) get_ir_type(type);
2554 if (designator->symbol != NULL) {
2555 assert(is_type_compound(type));
2556 symbol_t *symbol = designator->symbol;
2558 compound_t *compound = type->compound.compound;
2559 entity_t *iter = compound->members.entities;
2560 for ( ; iter != NULL; iter = iter->base.next) {
2561 if (iter->base.symbol == symbol) {
2565 assert(iter != NULL);
2567 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
2568 assert(iter->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2569 offset += get_entity_offset(iter->compound_member.entity);
2571 orig_type = iter->declaration.type;
2573 expression_t *array_index = designator->array_index;
2574 assert(designator->array_index != NULL);
2575 assert(is_type_array(type));
2577 long index = fold_constant(array_index);
2578 ir_type *arr_type = get_ir_type(type);
2579 ir_type *elem_type = get_array_element_type(arr_type);
2580 long elem_size = get_type_size_bytes(elem_type);
2582 offset += index * elem_size;
2584 orig_type = type->array.element_type;
2591 static ir_node *offsetof_to_firm(const offsetof_expression_t *expression)
2593 ir_mode *mode = get_ir_mode(expression->base.type);
2594 long offset = get_offsetof_offset(expression);
2595 tarval *tv = new_tarval_from_long(offset, mode);
2596 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2598 return new_d_Const(dbgi, tv);
2601 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
2602 ir_entity *entity, type_t *type);
2604 static ir_node *compound_literal_to_firm(
2605 const compound_literal_expression_t *expression)
2607 type_t *type = expression->type;
2609 /* create an entity on the stack */
2610 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
2612 ident *const id = id_unique("CompLit.%u");
2613 ir_type *const irtype = get_ir_type(type);
2614 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2615 ir_entity *const entity = new_d_entity(frame_type, id, irtype, dbgi);
2616 set_entity_ld_ident(entity, id);
2618 set_entity_variability(entity, variability_uninitialized);
2620 /* create initialisation code */
2621 initializer_t *initializer = expression->initializer;
2622 create_local_initializer(initializer, dbgi, entity, type);
2624 /* create a sel for the compound literal address */
2625 ir_node *frame = get_local_frame(entity);
2626 ir_node *sel = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
2631 * Transform a sizeof expression into Firm code.
2633 static ir_node *sizeof_to_firm(const typeprop_expression_t *expression)
2635 type_t *type = expression->type;
2637 type = expression->tp_expression->base.type;
2638 assert(type != NULL);
2641 type = skip_typeref(type);
2642 /* ยง 6.5.3.4 (2) if the type is a VLA, evaluate the expression. */
2643 if (is_type_array(type) && type->array.is_vla
2644 && expression->tp_expression != NULL) {
2645 expression_to_firm(expression->tp_expression);
2648 return get_type_size(type);
2652 * Transform an alignof expression into Firm code.
2654 static ir_node *alignof_to_firm(const typeprop_expression_t *expression)
2656 type_t *type = expression->type;
2658 /* beware: if expression is a variable reference, return the
2659 alignment of the variable. */
2660 const expression_t *tp_expression = expression->tp_expression;
2661 const entity_t *entity = expression_is_variable(tp_expression);
2662 if (entity != NULL) {
2663 /* TODO: get the alignment of this variable. */
2666 type = tp_expression->base.type;
2667 assert(type != NULL);
2670 ir_mode *const mode = get_ir_mode(expression->base.type);
2671 symconst_symbol sym;
2672 sym.type_p = get_ir_type(type);
2673 return new_SymConst(mode, sym, symconst_type_align);
2676 static void init_ir_types(void);
2678 long fold_constant(const expression_t *expression)
2680 assert(is_type_valid(skip_typeref(expression->base.type)));
2682 bool constant_folding_old = constant_folding;
2683 constant_folding = true;
2687 assert(is_constant_expression(expression));
2689 ir_graph *old_current_ir_graph = current_ir_graph;
2690 if (current_ir_graph == NULL) {
2691 current_ir_graph = get_const_code_irg();
2694 ir_node *cnst = expression_to_firm(expression);
2695 current_ir_graph = old_current_ir_graph;
2697 if (!is_Const(cnst)) {
2698 panic("couldn't fold constant");
2701 tarval *tv = get_Const_tarval(cnst);
2702 if (!tarval_is_long(tv)) {
2703 panic("result of constant folding is not integer");
2706 constant_folding = constant_folding_old;
2708 return get_tarval_long(tv);
2711 static ir_node *conditional_to_firm(const conditional_expression_t *expression)
2713 dbg_info *const dbgi = get_dbg_info(&expression->base.source_position);
2715 /* first try to fold a constant condition */
2716 if (is_constant_expression(expression->condition)) {
2717 long val = fold_constant(expression->condition);
2719 expression_t *true_expression = expression->true_expression;
2720 if (true_expression == NULL)
2721 true_expression = expression->condition;
2722 return expression_to_firm(true_expression);
2724 return expression_to_firm(expression->false_expression);
2728 ir_node *cur_block = get_cur_block();
2730 /* create the true block */
2731 ir_node *true_block = new_immBlock();
2733 ir_node *true_val = expression->true_expression != NULL ?
2734 expression_to_firm(expression->true_expression) : NULL;
2735 ir_node *true_jmp = new_Jmp();
2737 /* create the false block */
2738 ir_node *false_block = new_immBlock();
2740 ir_node *false_val = expression_to_firm(expression->false_expression);
2741 ir_node *false_jmp = new_Jmp();
2743 /* create the condition evaluation */
2744 set_cur_block(cur_block);
2745 ir_node *const cond_expr = create_condition_evaluation(expression->condition, true_block, false_block);
2746 if (expression->true_expression == NULL) {
2747 if (cond_expr != NULL) {
2748 true_val = cond_expr;
2750 /* Condition ended with a short circuit (&&, ||, !) operation.
2751 * Generate a "1" as value for the true branch. */
2752 true_val = new_Const(get_mode_one(mode_Is));
2755 mature_immBlock(true_block);
2756 mature_immBlock(false_block);
2758 /* create the common block */
2759 ir_node *in_cf[2] = { true_jmp, false_jmp };
2760 new_Block(2, in_cf);
2762 /* TODO improve static semantics, so either both or no values are NULL */
2763 if (true_val == NULL || false_val == NULL)
2766 ir_node *in[2] = { true_val, false_val };
2767 ir_mode *mode = get_irn_mode(true_val);
2768 assert(get_irn_mode(false_val) == mode);
2769 ir_node *val = new_d_Phi(dbgi, 2, in, mode);
2775 * Returns an IR-node representing the address of a field.
2777 static ir_node *select_addr(const select_expression_t *expression)
2779 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2781 construct_select_compound(expression);
2783 ir_node *compound_addr = expression_to_firm(expression->compound);
2785 entity_t *entry = expression->compound_entry;
2786 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2787 assert(entry->declaration.kind == DECLARATION_KIND_COMPOUND_MEMBER);
2789 if (constant_folding) {
2790 ir_mode *mode = get_irn_mode(compound_addr);
2791 /* FIXME: here, we need an integer mode with the same number of bits as mode */
2792 ir_node *ofs = new_Const_long(mode_uint, entry->compound_member.offset);
2793 return new_d_Add(dbgi, compound_addr, ofs, mode);
2795 ir_entity *irentity = entry->compound_member.entity;
2796 assert(irentity != NULL);
2797 return new_d_simpleSel(dbgi, new_NoMem(), compound_addr, irentity);
2801 static ir_node *select_to_firm(const select_expression_t *expression)
2803 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
2804 ir_node *addr = select_addr(expression);
2805 type_t *type = revert_automatic_type_conversion(
2806 (const expression_t*) expression);
2807 type = skip_typeref(type);
2809 entity_t *entry = expression->compound_entry;
2810 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
2811 type_t *entry_type = skip_typeref(entry->declaration.type);
2813 if (entry_type->kind == TYPE_BITFIELD) {
2814 return bitfield_extract_to_firm(expression, addr);
2817 return deref_address(dbgi, type, addr);
2820 /* Values returned by __builtin_classify_type. */
2821 typedef enum gcc_type_class
2827 enumeral_type_class,
2830 reference_type_class,
2834 function_type_class,
2845 static ir_node *classify_type_to_firm(const classify_type_expression_t *const expr)
2847 type_t *type = expr->type_expression->base.type;
2849 /* FIXME gcc returns different values depending on whether compiling C or C++
2850 * e.g. int x[10] is pointer_type_class in C, but array_type_class in C++ */
2853 type = skip_typeref(type);
2854 switch (type->kind) {
2856 const atomic_type_t *const atomic_type = &type->atomic;
2857 switch (atomic_type->akind) {
2858 /* should not be reached */
2859 case ATOMIC_TYPE_INVALID:
2863 /* gcc cannot do that */
2864 case ATOMIC_TYPE_VOID:
2865 tc = void_type_class;
2868 case ATOMIC_TYPE_WCHAR_T: /* gcc handles this as integer */
2869 case ATOMIC_TYPE_CHAR: /* gcc handles this as integer */
2870 case ATOMIC_TYPE_SCHAR: /* gcc handles this as integer */
2871 case ATOMIC_TYPE_UCHAR: /* gcc handles this as integer */
2872 case ATOMIC_TYPE_SHORT:
2873 case ATOMIC_TYPE_USHORT:
2874 case ATOMIC_TYPE_INT:
2875 case ATOMIC_TYPE_UINT:
2876 case ATOMIC_TYPE_LONG:
2877 case ATOMIC_TYPE_ULONG:
2878 case ATOMIC_TYPE_LONGLONG:
2879 case ATOMIC_TYPE_ULONGLONG:
2880 case ATOMIC_TYPE_BOOL: /* gcc handles this as integer */
2881 tc = integer_type_class;
2884 case ATOMIC_TYPE_FLOAT:
2885 case ATOMIC_TYPE_DOUBLE:
2886 case ATOMIC_TYPE_LONG_DOUBLE:
2887 tc = real_type_class;
2890 panic("Unexpected atomic type in classify_type_to_firm().");
2893 case TYPE_COMPLEX: tc = complex_type_class; goto make_const;
2894 case TYPE_IMAGINARY: tc = complex_type_class; goto make_const;
2895 case TYPE_BITFIELD: tc = integer_type_class; goto make_const;
2896 case TYPE_ARRAY: /* gcc handles this as pointer */
2897 case TYPE_FUNCTION: /* gcc handles this as pointer */
2898 case TYPE_POINTER: tc = pointer_type_class; goto make_const;
2899 case TYPE_COMPOUND_STRUCT: tc = record_type_class; goto make_const;
2900 case TYPE_COMPOUND_UNION: tc = union_type_class; goto make_const;
2902 /* gcc handles this as integer */
2903 case TYPE_ENUM: tc = integer_type_class; goto make_const;
2905 /* gcc classifies the referenced type */
2906 case TYPE_REFERENCE: type = type->reference.refers_to; continue;
2909 /* typedef/typeof should be skipped already */
2916 panic("unexpected TYPE classify_type_to_firm().");
2920 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2921 tarval *const tv = new_tarval_from_long(tc, mode_int);
2922 return new_d_Const(dbgi, tv);
2925 static ir_node *function_name_to_firm(
2926 const funcname_expression_t *const expr)
2928 switch(expr->kind) {
2929 case FUNCNAME_FUNCTION:
2930 case FUNCNAME_PRETTY_FUNCTION:
2931 case FUNCNAME_FUNCDNAME:
2932 if (current_function_name == NULL) {
2933 const source_position_t *const src_pos = &expr->base.source_position;
2934 const char *name = current_function_entity->base.symbol->string;
2935 const string_t string = { name, strlen(name) + 1 };
2936 current_function_name = string_to_firm(src_pos, "__func__.%u", &string);
2938 return current_function_name;
2939 case FUNCNAME_FUNCSIG:
2940 if (current_funcsig == NULL) {
2941 const source_position_t *const src_pos = &expr->base.source_position;
2942 ir_entity *ent = get_irg_entity(current_ir_graph);
2943 const char *const name = get_entity_ld_name(ent);
2944 const string_t string = { name, strlen(name) + 1 };
2945 current_funcsig = string_to_firm(src_pos, "__FUNCSIG__.%u", &string);
2947 return current_funcsig;
2949 panic("Unsupported function name");
2952 static ir_node *statement_expression_to_firm(const statement_expression_t *expr)
2954 statement_t *statement = expr->statement;
2956 assert(statement->kind == STATEMENT_COMPOUND);
2957 return compound_statement_to_firm(&statement->compound);
2960 static ir_node *va_start_expression_to_firm(
2961 const va_start_expression_t *const expr)
2963 type_t *const type = current_function_entity->declaration.type;
2964 ir_type *const method_type = get_ir_type(type);
2965 int const n = get_method_n_params(method_type) - 1;
2966 ir_entity *const parm_ent = get_method_value_param_ent(method_type, n);
2967 ir_node *const arg_base = get_irg_value_param_base(current_ir_graph);
2968 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2969 ir_node *const no_mem = new_NoMem();
2970 ir_node *const arg_sel =
2971 new_d_simpleSel(dbgi, no_mem, arg_base, parm_ent);
2973 ir_node *const cnst = get_type_size(expr->parameter->base.type);
2974 ir_node *const add = new_d_Add(dbgi, arg_sel, cnst, mode_P_data);
2975 set_value_for_expression(expr->ap, add);
2980 static ir_node *va_arg_expression_to_firm(const va_arg_expression_t *const expr)
2982 type_t *const type = expr->base.type;
2983 expression_t *const ap_expr = expr->ap;
2984 ir_node *const ap_addr = expression_to_addr(ap_expr);
2985 ir_node *const ap = get_value_from_lvalue(ap_expr, ap_addr);
2986 dbg_info *const dbgi = get_dbg_info(&expr->base.source_position);
2987 ir_node *const res = deref_address(dbgi, type, ap);
2989 ir_node *const cnst = get_type_size(expr->base.type);
2990 ir_node *const add = new_d_Add(dbgi, ap, cnst, mode_P_data);
2992 set_value_for_expression_addr(ap_expr, add, ap_addr);
2997 static ir_node *dereference_addr(const unary_expression_t *const expression)
2999 assert(expression->base.kind == EXPR_UNARY_DEREFERENCE);
3000 return expression_to_firm(expression->value);
3004 * Returns a IR-node representing an lvalue of the given expression.
3006 static ir_node *expression_to_addr(const expression_t *expression)
3008 switch(expression->kind) {
3009 case EXPR_ARRAY_ACCESS:
3010 return array_access_addr(&expression->array_access);
3012 return call_expression_to_firm(&expression->call);
3013 case EXPR_COMPOUND_LITERAL:
3014 return compound_literal_to_firm(&expression->compound_literal);
3015 case EXPR_REFERENCE:
3016 return reference_addr(&expression->reference);
3018 return select_addr(&expression->select);
3019 case EXPR_UNARY_DEREFERENCE:
3020 return dereference_addr(&expression->unary);
3024 panic("trying to get address of non-lvalue");
3027 static ir_node *builtin_constant_to_firm(
3028 const builtin_constant_expression_t *expression)
3030 ir_mode *mode = get_ir_mode(expression->base.type);
3033 if (is_constant_expression(expression->value)) {
3038 return new_Const_long(mode, v);
3041 static ir_node *builtin_prefetch_to_firm(
3042 const builtin_prefetch_expression_t *expression)
3044 ir_node *adr = expression_to_firm(expression->adr);
3045 /* no Firm support for prefetch yet */
3050 static ir_node *get_label_block(label_t *label)
3052 if (label->block != NULL)
3053 return label->block;
3055 /* beware: might be called from create initializer with current_ir_graph
3056 * set to const_code_irg. */
3057 ir_graph *rem = current_ir_graph;
3058 current_ir_graph = current_function;
3060 ir_node *old_cur_block = get_cur_block();
3061 ir_node *block = new_immBlock();
3062 set_cur_block(old_cur_block);
3064 label->block = block;
3066 ARR_APP1(label_t *, all_labels, label);
3068 current_ir_graph = rem;
3073 * Pointer to a label. This is used for the
3074 * GNU address-of-label extension.
3076 static ir_node *label_address_to_firm(
3077 const label_address_expression_t *label)
3079 ir_node *block = get_label_block(label->label);
3080 ir_label_t nr = get_Block_label(block);
3083 nr = get_irp_next_label_nr();
3084 set_Block_label(block, nr);
3086 symconst_symbol value;
3088 return new_SymConst(mode_P_code, value, symconst_label);
3091 static ir_node *builtin_symbol_to_firm(
3092 const builtin_symbol_expression_t *expression)
3094 /* for gcc compatibility we have to produce (dummy) addresses for some
3096 if (warning.other) {
3097 warningf(&expression->base.source_position,
3098 "taking address of builtin '%Y'", expression->symbol);
3101 /* simply create a NULL pointer */
3102 ir_mode *mode = get_ir_mode(type_void_ptr);
3103 ir_node *res = new_Const_long(mode, 0);
3109 * creates firm nodes for an expression. The difference between this function
3110 * and expression_to_firm is, that this version might produce mode_b nodes
3111 * instead of mode_Is.
3113 static ir_node *_expression_to_firm(const expression_t *expression)
3116 if (!constant_folding) {
3117 assert(!expression->base.transformed);
3118 ((expression_t*) expression)->base.transformed = true;
3122 switch (expression->kind) {
3123 case EXPR_CHARACTER_CONSTANT:
3124 return character_constant_to_firm(&expression->conste);
3125 case EXPR_WIDE_CHARACTER_CONSTANT:
3126 return wide_character_constant_to_firm(&expression->conste);
3128 return const_to_firm(&expression->conste);
3129 case EXPR_STRING_LITERAL:
3130 return string_literal_to_firm(&expression->string);
3131 case EXPR_WIDE_STRING_LITERAL:
3132 return wide_string_literal_to_firm(&expression->wide_string);
3133 case EXPR_REFERENCE:
3134 return reference_expression_to_firm(&expression->reference);
3135 case EXPR_REFERENCE_ENUM_VALUE:
3136 return reference_expression_enum_value_to_firm(&expression->reference);
3138 return call_expression_to_firm(&expression->call);
3140 return unary_expression_to_firm(&expression->unary);
3142 return binary_expression_to_firm(&expression->binary);
3143 case EXPR_ARRAY_ACCESS:
3144 return array_access_to_firm(&expression->array_access);
3146 return sizeof_to_firm(&expression->typeprop);
3148 return alignof_to_firm(&expression->typeprop);
3149 case EXPR_CONDITIONAL:
3150 return conditional_to_firm(&expression->conditional);
3152 return select_to_firm(&expression->select);
3153 case EXPR_CLASSIFY_TYPE:
3154 return classify_type_to_firm(&expression->classify_type);
3156 return function_name_to_firm(&expression->funcname);
3157 case EXPR_STATEMENT:
3158 return statement_expression_to_firm(&expression->statement);
3160 return va_start_expression_to_firm(&expression->va_starte);
3162 return va_arg_expression_to_firm(&expression->va_arge);
3163 case EXPR_BUILTIN_SYMBOL:
3164 return builtin_symbol_to_firm(&expression->builtin_symbol);
3165 case EXPR_BUILTIN_CONSTANT_P:
3166 return builtin_constant_to_firm(&expression->builtin_constant);
3167 case EXPR_BUILTIN_PREFETCH:
3168 return builtin_prefetch_to_firm(&expression->builtin_prefetch);
3170 return offsetof_to_firm(&expression->offsetofe);
3171 case EXPR_COMPOUND_LITERAL:
3172 return compound_literal_to_firm(&expression->compound_literal);
3173 case EXPR_LABEL_ADDRESS:
3174 return label_address_to_firm(&expression->label_address);
3180 panic("invalid expression found");
3183 static bool is_builtin_expect(const expression_t *expression)
3185 if (expression->kind != EXPR_CALL)
3188 expression_t *function = expression->call.function;
3189 if (function->kind != EXPR_BUILTIN_SYMBOL)
3191 if (function->builtin_symbol.symbol->ID != T___builtin_expect)
3197 static bool produces_mode_b(const expression_t *expression)
3199 switch (expression->kind) {
3200 case EXPR_BINARY_EQUAL:
3201 case EXPR_BINARY_NOTEQUAL:
3202 case EXPR_BINARY_LESS:
3203 case EXPR_BINARY_LESSEQUAL:
3204 case EXPR_BINARY_GREATER:
3205 case EXPR_BINARY_GREATEREQUAL:
3206 case EXPR_BINARY_ISGREATER:
3207 case EXPR_BINARY_ISGREATEREQUAL:
3208 case EXPR_BINARY_ISLESS:
3209 case EXPR_BINARY_ISLESSEQUAL:
3210 case EXPR_BINARY_ISLESSGREATER:
3211 case EXPR_BINARY_ISUNORDERED:
3212 case EXPR_UNARY_NOT:
3216 if (is_builtin_expect(expression)) {
3217 expression_t *argument = expression->call.arguments->expression;
3218 return produces_mode_b(argument);
3221 case EXPR_BINARY_COMMA:
3222 return produces_mode_b(expression->binary.right);
3229 static ir_node *expression_to_firm(const expression_t *expression)
3231 if (!produces_mode_b(expression)) {
3232 ir_node *res = _expression_to_firm(expression);
3233 assert(res == NULL || get_irn_mode(res) != mode_b);
3237 if (is_constant_expression(expression)) {
3238 ir_node *res = _expression_to_firm(expression);
3239 ir_mode *mode = get_ir_mode(expression->base.type);
3240 assert(is_Const(res));
3241 if (is_Const_null(res)) {
3242 return new_Const_long(mode, 0);
3244 return new_Const_long(mode, 1);
3248 /* we have to produce a 0/1 from the mode_b expression */
3249 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3250 ir_mode *mode = get_ir_mode(expression->base.type);
3251 return produce_condition_result(expression, mode, dbgi);
3255 * create a short-circuit expression evaluation that tries to construct
3256 * efficient control flow structures for &&, || and ! expressions
3258 static ir_node *create_condition_evaluation(const expression_t *expression,
3259 ir_node *true_block,
3260 ir_node *false_block)
3262 switch(expression->kind) {
3263 case EXPR_UNARY_NOT: {
3264 const unary_expression_t *unary_expression = &expression->unary;
3265 create_condition_evaluation(unary_expression->value, false_block,
3269 case EXPR_BINARY_LOGICAL_AND: {
3270 const binary_expression_t *binary_expression = &expression->binary;
3272 ir_node *cur_block = get_cur_block();
3273 ir_node *extra_block = new_immBlock();
3274 set_cur_block(cur_block);
3275 create_condition_evaluation(binary_expression->left, extra_block,
3277 mature_immBlock(extra_block);
3278 set_cur_block(extra_block);
3279 create_condition_evaluation(binary_expression->right, true_block,
3283 case EXPR_BINARY_LOGICAL_OR: {
3284 const binary_expression_t *binary_expression = &expression->binary;
3286 ir_node *cur_block = get_cur_block();
3287 ir_node *extra_block = new_immBlock();
3288 set_cur_block(cur_block);
3289 create_condition_evaluation(binary_expression->left, true_block,
3291 mature_immBlock(extra_block);
3292 set_cur_block(extra_block);
3293 create_condition_evaluation(binary_expression->right, true_block,
3301 dbg_info *dbgi = get_dbg_info(&expression->base.source_position);
3302 ir_node *cond_expr = _expression_to_firm(expression);
3303 ir_node *condition = create_conv(dbgi, cond_expr, mode_b);
3304 ir_node *cond = new_d_Cond(dbgi, condition);
3305 ir_node *true_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_true);
3306 ir_node *false_proj = new_d_Proj(dbgi, cond, mode_X, pn_Cond_false);
3308 /* set branch prediction info based on __builtin_expect */
3309 if (is_builtin_expect(expression)) {
3310 call_argument_t *argument = expression->call.arguments->next;
3311 if (is_constant_expression(argument->expression)) {
3312 long cnst = fold_constant(argument->expression);
3313 cond_jmp_predicate pred;
3316 pred = COND_JMP_PRED_FALSE;
3318 pred = COND_JMP_PRED_TRUE;
3320 set_Cond_jmp_pred(cond, pred);
3324 add_immBlock_pred(true_block, true_proj);
3325 add_immBlock_pred(false_block, false_proj);
3327 set_cur_block(NULL);
3332 static void create_variable_entity(entity_t *variable,
3333 declaration_kind_t declaration_kind,
3334 ir_type *parent_type)
3336 assert(variable->kind == ENTITY_VARIABLE);
3337 type_t *const type = skip_typeref(variable->declaration.type);
3338 ident *const id = new_id_from_str(variable->base.symbol->string);
3339 ir_type *const irtype = get_ir_type(type);
3340 dbg_info *const dbgi = get_dbg_info(&variable->base.source_position);
3341 ir_entity *const irentity = new_d_entity(parent_type, id, irtype, dbgi);
3343 handle_gnu_attributes_ent(irentity, variable);
3345 variable->declaration.kind = (unsigned char) declaration_kind;
3346 variable->variable.v.entity = irentity;
3347 set_entity_variability(irentity, variability_uninitialized);
3348 set_entity_ld_ident(irentity, create_ld_ident(variable));
3349 if (parent_type == get_tls_type())
3350 set_entity_allocation(irentity, allocation_automatic);
3351 else if (declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE)
3352 set_entity_allocation(irentity, allocation_static);
3354 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
3355 set_entity_volatility(irentity, volatility_is_volatile);
3360 typedef struct type_path_entry_t type_path_entry_t;
3361 struct type_path_entry_t {
3363 ir_initializer_t *initializer;
3365 entity_t *compound_entry;
3368 typedef struct type_path_t type_path_t;
3369 struct type_path_t {
3370 type_path_entry_t *path;
3375 static __attribute__((unused)) void debug_print_type_path(const type_path_t *path)
3377 size_t len = ARR_LEN(path->path);
3379 for (size_t i = 0; i < len; ++i) {
3380 const type_path_entry_t *entry = & path->path[i];
3382 type_t *type = skip_typeref(entry->type);
3383 if (is_type_compound(type)) {
3384 fprintf(stderr, ".%s", entry->compound_entry->base.symbol->string);
3385 } else if (is_type_array(type)) {
3386 fprintf(stderr, "[%u]", (unsigned) entry->index);
3388 fprintf(stderr, "-INVALID-");
3391 fprintf(stderr, " (");
3392 print_type(path->top_type);
3393 fprintf(stderr, ")");
3396 static type_path_entry_t *get_type_path_top(const type_path_t *path)
3398 size_t len = ARR_LEN(path->path);
3400 return & path->path[len-1];
3403 static type_path_entry_t *append_to_type_path(type_path_t *path)
3405 size_t len = ARR_LEN(path->path);
3406 ARR_RESIZE(type_path_entry_t, path->path, len+1);
3408 type_path_entry_t *result = & path->path[len];
3409 memset(result, 0, sizeof(result[0]));
3413 static size_t get_compound_member_count(const compound_type_t *type)
3415 compound_t *compound = type->compound;
3416 size_t n_members = 0;
3417 entity_t *member = compound->members.entities;
3418 for ( ; member != NULL; member = member->base.next) {
3425 static ir_initializer_t *get_initializer_entry(type_path_t *path)
3427 type_t *orig_top_type = path->top_type;
3428 type_t *top_type = skip_typeref(orig_top_type);
3430 assert(is_type_compound(top_type) || is_type_array(top_type));
3432 if (ARR_LEN(path->path) == 0) {
3435 type_path_entry_t *top = get_type_path_top(path);
3436 ir_initializer_t *initializer = top->initializer;
3437 return get_initializer_compound_value(initializer, top->index);
3441 static void descend_into_subtype(type_path_t *path)
3443 type_t *orig_top_type = path->top_type;
3444 type_t *top_type = skip_typeref(orig_top_type);
3446 assert(is_type_compound(top_type) || is_type_array(top_type));
3448 ir_initializer_t *initializer = get_initializer_entry(path);
3450 type_path_entry_t *top = append_to_type_path(path);
3451 top->type = top_type;
3455 if (is_type_compound(top_type)) {
3456 compound_t *compound = top_type->compound.compound;
3457 entity_t *entry = compound->members.entities;
3459 top->compound_entry = entry;
3461 len = get_compound_member_count(&top_type->compound);
3462 if (entry != NULL) {
3463 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3464 path->top_type = entry->declaration.type;
3467 assert(is_type_array(top_type));
3468 assert(top_type->array.size > 0);
3471 path->top_type = top_type->array.element_type;
3472 len = top_type->array.size;
3474 if (initializer == NULL
3475 || get_initializer_kind(initializer) == IR_INITIALIZER_NULL) {
3476 initializer = create_initializer_compound(len);
3477 /* we have to set the entry at the 2nd latest path entry... */
3478 size_t path_len = ARR_LEN(path->path);
3479 assert(path_len >= 1);
3481 type_path_entry_t *entry = & path->path[path_len-2];
3482 ir_initializer_t *tinitializer = entry->initializer;
3483 set_initializer_compound_value(tinitializer, entry->index,
3487 top->initializer = initializer;
3490 static void ascend_from_subtype(type_path_t *path)
3492 type_path_entry_t *top = get_type_path_top(path);
3494 path->top_type = top->type;
3496 size_t len = ARR_LEN(path->path);
3497 ARR_RESIZE(type_path_entry_t, path->path, len-1);
3500 static void walk_designator(type_path_t *path, const designator_t *designator)
3502 /* designators start at current object type */
3503 ARR_RESIZE(type_path_entry_t, path->path, 1);
3505 for ( ; designator != NULL; designator = designator->next) {
3506 type_path_entry_t *top = get_type_path_top(path);
3507 type_t *orig_type = top->type;
3508 type_t *type = skip_typeref(orig_type);
3510 if (designator->symbol != NULL) {
3511 assert(is_type_compound(type));
3513 symbol_t *symbol = designator->symbol;
3515 compound_t *compound = type->compound.compound;
3516 entity_t *iter = compound->members.entities;
3517 for ( ; iter != NULL; iter = iter->base.next, ++index) {
3518 if (iter->base.symbol == symbol) {
3519 assert(iter->kind == ENTITY_COMPOUND_MEMBER);
3523 assert(iter != NULL);
3525 top->type = orig_type;
3526 top->compound_entry = iter;
3528 orig_type = iter->declaration.type;
3530 expression_t *array_index = designator->array_index;
3531 assert(designator->array_index != NULL);
3532 assert(is_type_array(type));
3534 long index = fold_constant(array_index);
3537 if (type->array.size_constant) {
3538 long array_size = type->array.size;
3539 assert(index < array_size);
3543 top->type = orig_type;
3544 top->index = (size_t) index;
3545 orig_type = type->array.element_type;
3547 path->top_type = orig_type;
3549 if (designator->next != NULL) {
3550 descend_into_subtype(path);
3554 path->invalid = false;
3557 static void advance_current_object(type_path_t *path)
3559 if (path->invalid) {
3560 /* TODO: handle this... */
3561 panic("invalid initializer in ast2firm (excessive elements)");
3564 type_path_entry_t *top = get_type_path_top(path);
3566 type_t *type = skip_typeref(top->type);
3567 if (is_type_union(type)) {
3568 top->compound_entry = NULL;
3569 } else if (is_type_struct(type)) {
3570 entity_t *entry = top->compound_entry;
3573 entry = entry->base.next;
3574 top->compound_entry = entry;
3575 if (entry != NULL) {
3576 assert(entry->kind == ENTITY_COMPOUND_MEMBER);
3577 path->top_type = entry->declaration.type;
3581 assert(is_type_array(type));
3584 if (!type->array.size_constant || top->index < type->array.size) {
3589 /* we're past the last member of the current sub-aggregate, try if we
3590 * can ascend in the type hierarchy and continue with another subobject */
3591 size_t len = ARR_LEN(path->path);
3594 ascend_from_subtype(path);
3595 advance_current_object(path);
3597 path->invalid = true;
3602 static ir_initializer_t *create_ir_initializer(
3603 const initializer_t *initializer, type_t *type);
3605 static ir_initializer_t *create_ir_initializer_value(
3606 const initializer_value_t *initializer)
3608 if (is_type_compound(initializer->value->base.type)) {
3609 panic("initializer creation for compounds not implemented yet");
3611 ir_node *value = expression_to_firm(initializer->value);
3612 return create_initializer_const(value);
3615 /** test wether type can be initialized by a string constant */
3616 static bool is_string_type(type_t *type)
3619 if (is_type_pointer(type)) {
3620 inner = skip_typeref(type->pointer.points_to);
3621 } else if(is_type_array(type)) {
3622 inner = skip_typeref(type->array.element_type);
3627 return is_type_integer(inner);
3630 static ir_initializer_t *create_ir_initializer_list(
3631 const initializer_list_t *initializer, type_t *type)
3634 memset(&path, 0, sizeof(path));
3635 path.top_type = type;
3636 path.path = NEW_ARR_F(type_path_entry_t, 0);
3638 descend_into_subtype(&path);
3640 for (size_t i = 0; i < initializer->len; ++i) {
3641 const initializer_t *sub_initializer = initializer->initializers[i];
3643 if (sub_initializer->kind == INITIALIZER_DESIGNATOR) {
3644 walk_designator(&path, sub_initializer->designator.designator);
3648 if (sub_initializer->kind == INITIALIZER_VALUE) {
3649 /* we might have to descend into types until we're at a scalar
3652 type_t *orig_top_type = path.top_type;
3653 type_t *top_type = skip_typeref(orig_top_type);
3655 if (is_type_scalar(top_type))
3657 descend_into_subtype(&path);
3659 } else if (sub_initializer->kind == INITIALIZER_STRING
3660 || sub_initializer->kind == INITIALIZER_WIDE_STRING) {
3661 /* we might have to descend into types until we're at a scalar
3664 type_t *orig_top_type = path.top_type;
3665 type_t *top_type = skip_typeref(orig_top_type);
3667 if (is_string_type(top_type))
3669 descend_into_subtype(&path);
3673 ir_initializer_t *sub_irinitializer
3674 = create_ir_initializer(sub_initializer, path.top_type);
3676 size_t path_len = ARR_LEN(path.path);
3677 assert(path_len >= 1);
3678 type_path_entry_t *entry = & path.path[path_len-1];
3679 ir_initializer_t *tinitializer = entry->initializer;
3680 set_initializer_compound_value(tinitializer, entry->index,
3683 advance_current_object(&path);
3686 assert(ARR_LEN(path.path) >= 1);
3687 ir_initializer_t *result = path.path[0].initializer;
3688 DEL_ARR_F(path.path);
3693 static ir_initializer_t *create_ir_initializer_string(
3694 const initializer_string_t *initializer, type_t *type)
3696 type = skip_typeref(type);
3698 size_t string_len = initializer->string.size;
3699 assert(type->kind == TYPE_ARRAY);
3700 assert(type->array.size_constant);
3701 size_t len = type->array.size;
3702 ir_initializer_t *irinitializer = create_initializer_compound(len);
3704 const char *string = initializer->string.begin;
3705 ir_mode *mode = get_ir_mode(type->array.element_type);
3707 for (size_t i = 0; i < len; ++i) {
3712 tarval *tv = new_tarval_from_long(c, mode);
3713 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3715 set_initializer_compound_value(irinitializer, i, char_initializer);
3718 return irinitializer;
3721 static ir_initializer_t *create_ir_initializer_wide_string(
3722 const initializer_wide_string_t *initializer, type_t *type)
3724 size_t string_len = initializer->string.size;
3725 assert(type->kind == TYPE_ARRAY);
3726 assert(type->array.size_constant);
3727 size_t len = type->array.size;
3728 ir_initializer_t *irinitializer = create_initializer_compound(len);
3730 const wchar_rep_t *string = initializer->string.begin;
3731 ir_mode *mode = get_type_mode(ir_type_wchar_t);
3733 for (size_t i = 0; i < len; ++i) {
3735 if (i < string_len) {
3738 tarval *tv = new_tarval_from_long(c, mode);
3739 ir_initializer_t *char_initializer = create_initializer_tarval(tv);
3741 set_initializer_compound_value(irinitializer, i, char_initializer);
3744 return irinitializer;
3747 static ir_initializer_t *create_ir_initializer(
3748 const initializer_t *initializer, type_t *type)
3750 switch(initializer->kind) {
3751 case INITIALIZER_STRING:
3752 return create_ir_initializer_string(&initializer->string, type);
3754 case INITIALIZER_WIDE_STRING:
3755 return create_ir_initializer_wide_string(&initializer->wide_string,
3758 case INITIALIZER_LIST:
3759 return create_ir_initializer_list(&initializer->list, type);
3761 case INITIALIZER_VALUE:
3762 return create_ir_initializer_value(&initializer->value);
3764 case INITIALIZER_DESIGNATOR:
3765 panic("unexpected designator initializer found");
3767 panic("unknown initializer");
3770 static void create_dynamic_null_initializer(ir_type *type, dbg_info *dbgi,
3773 if (is_atomic_type(type)) {
3774 ir_mode *mode = get_type_mode(type);
3775 tarval *zero = get_mode_null(mode);
3776 ir_node *cnst = new_d_Const(dbgi, zero);
3778 /* TODO: bitfields */
3779 ir_node *mem = get_store();
3780 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3781 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3784 assert(is_compound_type(type));
3787 if (is_Array_type(type)) {
3788 assert(has_array_upper_bound(type, 0));
3789 n_members = get_array_upper_bound_int(type, 0);
3791 n_members = get_compound_n_members(type);
3794 for (int i = 0; i < n_members; ++i) {
3797 if (is_Array_type(type)) {
3798 ir_entity *entity = get_array_element_entity(type);
3799 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3800 ir_node *cnst = new_d_Const(dbgi, index_tv);
3801 ir_node *in[1] = { cnst };
3802 irtype = get_array_element_type(type);
3803 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in, entity);
3805 ir_entity *member = get_compound_member(type, i);
3807 irtype = get_entity_type(member);
3808 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr, member);
3811 create_dynamic_null_initializer(irtype, dbgi, addr);
3816 static void create_dynamic_initializer_sub(ir_initializer_t *initializer,
3817 ir_entity *entity, ir_type *type, dbg_info *dbgi, ir_node *base_addr)
3819 switch(get_initializer_kind(initializer)) {
3820 case IR_INITIALIZER_NULL: {
3821 create_dynamic_null_initializer(type, dbgi, base_addr);
3824 case IR_INITIALIZER_CONST: {
3825 ir_node *node = get_initializer_const_value(initializer);
3826 ir_mode *mode = get_irn_mode(node);
3827 ir_type *ent_type = get_entity_type(entity);
3829 /* is it a bitfield type? */
3830 if (is_Primitive_type(ent_type) &&
3831 get_primitive_base_type(ent_type) != NULL) {
3832 bitfield_store_to_firm(dbgi, entity, base_addr, node, false);
3836 assert(get_type_mode(type) == mode);
3837 ir_node *mem = get_store();
3838 ir_node *store = new_d_Store(dbgi, mem, base_addr, node);
3839 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3843 case IR_INITIALIZER_TARVAL: {
3844 tarval *tv = get_initializer_tarval_value(initializer);
3845 ir_mode *mode = get_tarval_mode(tv);
3846 ir_node *cnst = new_d_Const(dbgi, tv);
3847 ir_type *ent_type = get_entity_type(entity);
3849 /* is it a bitfield type? */
3850 if (is_Primitive_type(ent_type) &&
3851 get_primitive_base_type(ent_type) != NULL) {
3852 bitfield_store_to_firm(dbgi, entity, base_addr, cnst, false);
3856 assert(get_type_mode(type) == mode);
3857 ir_node *mem = get_store();
3858 ir_node *store = new_d_Store(dbgi, mem, base_addr, cnst);
3859 ir_node *proj_m = new_Proj(store, mode_M, pn_Store_M);
3863 case IR_INITIALIZER_COMPOUND: {
3864 assert(is_compound_type(type));
3866 if (is_Array_type(type)) {
3867 assert(has_array_upper_bound(type, 0));
3868 n_members = get_array_upper_bound_int(type, 0);
3870 n_members = get_compound_n_members(type);
3873 if (get_initializer_compound_n_entries(initializer)
3874 != (unsigned) n_members)
3875 panic("initializer doesn't match compound type");
3877 for (int i = 0; i < n_members; ++i) {
3880 ir_entity *sub_entity;
3881 if (is_Array_type(type)) {
3882 tarval *index_tv = new_tarval_from_long(i, mode_uint);
3883 ir_node *cnst = new_d_Const(dbgi, index_tv);
3884 ir_node *in[1] = { cnst };
3885 irtype = get_array_element_type(type);
3886 sub_entity = get_array_element_entity(type);
3887 addr = new_d_Sel(dbgi, new_NoMem(), base_addr, 1, in,
3890 sub_entity = get_compound_member(type, i);
3891 irtype = get_entity_type(sub_entity);
3892 addr = new_d_simpleSel(dbgi, new_NoMem(), base_addr,
3896 ir_initializer_t *sub_init
3897 = get_initializer_compound_value(initializer, i);
3899 create_dynamic_initializer_sub(sub_init, sub_entity, irtype, dbgi,
3906 panic("invalid IR_INITIALIZER found");
3909 static void create_dynamic_initializer(ir_initializer_t *initializer,
3910 dbg_info *dbgi, ir_entity *entity)
3912 ir_node *frame = get_local_frame(entity);
3913 ir_node *base_addr = new_d_simpleSel(dbgi, new_NoMem(), frame, entity);
3914 ir_type *type = get_entity_type(entity);
3916 create_dynamic_initializer_sub(initializer, entity, type, dbgi, base_addr);
3919 static void create_local_initializer(initializer_t *initializer, dbg_info *dbgi,
3920 ir_entity *entity, type_t *type)
3922 ir_node *memory = get_store();
3923 ir_node *nomem = new_NoMem();
3924 ir_node *frame = get_irg_frame(current_ir_graph);
3925 ir_node *addr = new_d_simpleSel(dbgi, nomem, frame, entity);
3927 if (initializer->kind == INITIALIZER_VALUE) {
3928 initializer_value_t *initializer_value = &initializer->value;
3930 ir_node *value = expression_to_firm(initializer_value->value);
3931 type = skip_typeref(type);
3932 assign_value(dbgi, addr, type, value);
3936 if (!is_constant_initializer(initializer)) {
3937 ir_initializer_t *irinitializer
3938 = create_ir_initializer(initializer, type);
3940 create_dynamic_initializer(irinitializer, dbgi, entity);
3944 /* create the ir_initializer */
3945 ir_graph *const old_current_ir_graph = current_ir_graph;
3946 current_ir_graph = get_const_code_irg();
3948 ir_initializer_t *irinitializer = create_ir_initializer(initializer, type);
3950 assert(current_ir_graph == get_const_code_irg());
3951 current_ir_graph = old_current_ir_graph;
3953 /* create a "template" entity which is copied to the entity on the stack */
3954 ident *const id = id_unique("initializer.%u");
3955 ir_type *const irtype = get_ir_type(type);
3956 ir_type *const global_type = get_glob_type();
3957 ir_entity *const init_entity = new_d_entity(global_type, id, irtype, dbgi);
3958 set_entity_ld_ident(init_entity, id);
3960 set_entity_variability(init_entity, variability_initialized);
3961 set_entity_visibility(init_entity, visibility_local);
3962 set_entity_allocation(init_entity, allocation_static);
3964 set_entity_initializer(init_entity, irinitializer);
3966 ir_node *const src_addr = create_symconst(dbgi, mode_P_data, init_entity);
3967 ir_node *const copyb = new_d_CopyB(dbgi, memory, addr, src_addr, irtype);
3969 ir_node *const copyb_mem = new_Proj(copyb, mode_M, pn_CopyB_M_regular);
3970 set_store(copyb_mem);
3973 static void create_initializer_local_variable_entity(entity_t *entity)
3975 assert(entity->kind == ENTITY_VARIABLE);
3976 initializer_t *initializer = entity->variable.initializer;
3977 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
3978 ir_entity *irentity = entity->variable.v.entity;
3979 type_t *type = entity->declaration.type;
3980 create_local_initializer(initializer, dbgi, irentity, type);
3983 static void create_variable_initializer(entity_t *entity)
3985 assert(entity->kind == ENTITY_VARIABLE);
3986 initializer_t *initializer = entity->variable.initializer;
3987 if (initializer == NULL)
3990 declaration_kind_t declaration_kind
3991 = (declaration_kind_t) entity->declaration.kind;
3992 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY) {
3993 create_initializer_local_variable_entity(entity);
3997 type_t *type = entity->declaration.type;
3998 type_qualifiers_t tq = get_type_qualifier(type, true);
4000 if (initializer->kind == INITIALIZER_VALUE) {
4001 initializer_value_t *initializer_value = &initializer->value;
4002 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4004 ir_node *value = expression_to_firm(initializer_value->value);
4005 value = do_strict_conv(dbgi, value);
4007 if (declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE) {
4008 set_value(entity->variable.v.value_number, value);
4010 assert(declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4012 ir_entity *irentity = entity->variable.v.entity;
4014 if (tq & TYPE_QUALIFIER_CONST) {
4015 set_entity_variability(irentity, variability_constant);
4017 set_entity_variability(irentity, variability_initialized);
4019 set_atomic_ent_value(irentity, value);
4022 assert(declaration_kind == DECLARATION_KIND_LOCAL_VARIABLE_ENTITY ||
4023 declaration_kind == DECLARATION_KIND_GLOBAL_VARIABLE);
4025 ir_entity *irentity = entity->variable.v.entity;
4026 ir_initializer_t *irinitializer
4027 = create_ir_initializer(initializer, type);
4029 if (tq & TYPE_QUALIFIER_CONST) {
4030 set_entity_variability(irentity, variability_constant);
4032 set_entity_variability(irentity, variability_initialized);
4034 set_entity_initializer(irentity, irinitializer);
4038 static void create_variable_length_array(entity_t *entity)
4040 assert(entity->kind == ENTITY_VARIABLE);
4041 assert(entity->variable.initializer == NULL);
4043 entity->declaration.kind = DECLARATION_KIND_VARIABLE_LENGTH_ARRAY;
4044 entity->variable.v.vla_base = NULL;
4046 /* TODO: record VLA somewhere so we create the free node when we leave
4050 static void allocate_variable_length_array(entity_t *entity)
4052 assert(entity->kind == ENTITY_VARIABLE);
4053 assert(entity->variable.initializer == NULL);
4054 assert(get_cur_block() != NULL);
4056 dbg_info *dbgi = get_dbg_info(&entity->base.source_position);
4057 type_t *type = entity->declaration.type;
4058 ir_type *el_type = get_ir_type(type->array.element_type);
4060 /* make sure size_node is calculated */
4061 get_type_size(type);
4062 ir_node *elems = type->array.size_node;
4063 ir_node *mem = get_store();
4064 ir_node *alloc = new_d_Alloc(dbgi, mem, elems, el_type, stack_alloc);
4066 ir_node *proj_m = new_d_Proj(dbgi, alloc, mode_M, pn_Alloc_M);
4067 ir_node *addr = new_d_Proj(dbgi, alloc, mode_P_data, pn_Alloc_res);
4070 assert(entity->declaration.kind == DECLARATION_KIND_VARIABLE_LENGTH_ARRAY);
4071 entity->variable.v.vla_base = addr;
4075 * Creates a Firm local variable from a declaration.
4077 static void create_local_variable(entity_t *entity)
4079 assert(entity->kind == ENTITY_VARIABLE);
4080 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4082 bool needs_entity = entity->variable.address_taken;
4083 type_t *type = skip_typeref(entity->declaration.type);
4085 /* is it a variable length array? */
4086 if (is_type_array(type) && !type->array.size_constant) {
4087 create_variable_length_array(entity);
4089 } else if (is_type_array(type) || is_type_compound(type)) {
4090 needs_entity = true;
4091 } else if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4092 needs_entity = true;
4096 ir_type *frame_type = get_irg_frame_type(current_ir_graph);
4097 create_variable_entity(entity,
4098 DECLARATION_KIND_LOCAL_VARIABLE_ENTITY,
4101 entity->declaration.kind = DECLARATION_KIND_LOCAL_VARIABLE;
4102 entity->variable.v.value_number = next_value_number_function;
4103 set_irg_loc_description(current_ir_graph, next_value_number_function,
4105 ++next_value_number_function;
4109 static void create_local_static_variable(entity_t *entity)
4111 assert(entity->kind == ENTITY_VARIABLE);
4112 assert(entity->declaration.kind == DECLARATION_KIND_UNKNOWN);
4114 type_t *const type = skip_typeref(entity->declaration.type);
4115 ir_type *const var_type = entity->variable.thread_local ?
4116 get_tls_type() : get_glob_type();
4117 ir_type *const irtype = get_ir_type(type);
4118 dbg_info *const dbgi = get_dbg_info(&entity->base.source_position);
4120 size_t l = strlen(entity->base.symbol->string);
4121 char buf[l + sizeof(".%u")];
4122 snprintf(buf, sizeof(buf), "%s.%%u", entity->base.symbol->string);
4123 ident *const id = id_unique(buf);
4125 ir_entity *const irentity = new_d_entity(var_type, id, irtype, dbgi);
4127 if (type->base.qualifiers & TYPE_QUALIFIER_VOLATILE) {
4128 set_entity_volatility(irentity, volatility_is_volatile);
4131 entity->declaration.kind = DECLARATION_KIND_GLOBAL_VARIABLE;
4132 entity->variable.v.entity = irentity;
4133 set_entity_ld_ident(irentity, id);
4134 set_entity_variability(irentity, variability_uninitialized);
4135 set_entity_visibility(irentity, visibility_local);
4136 set_entity_allocation(irentity, entity->variable.thread_local ?
4137 allocation_automatic : allocation_static);
4139 ir_graph *const old_current_ir_graph = current_ir_graph;
4140 current_ir_graph = get_const_code_irg();
4142 create_variable_initializer(entity);
4144 assert(current_ir_graph == get_const_code_irg());
4145 current_ir_graph = old_current_ir_graph;
4150 static void return_statement_to_firm(return_statement_t *statement)
4152 if (get_cur_block() == NULL)
4155 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4156 type_t *type = current_function_entity->declaration.type;
4157 ir_type *func_irtype = get_ir_type(type);
4162 if (get_method_n_ress(func_irtype) > 0) {
4163 ir_type *res_type = get_method_res_type(func_irtype, 0);
4165 if (statement->value != NULL) {
4166 ir_node *node = expression_to_firm(statement->value);
4167 node = do_strict_conv(dbgi, node);
4171 if (is_compound_type(res_type)) {
4174 mode = get_type_mode(res_type);
4176 in[0] = new_Unknown(mode);
4180 /* build return_value for its side effects */
4181 if (statement->value != NULL) {
4182 expression_to_firm(statement->value);
4187 ir_node *store = get_store();
4188 ir_node *ret = new_d_Return(dbgi, store, in_len, in);
4190 ir_node *end_block = get_irg_end_block(current_ir_graph);
4191 add_immBlock_pred(end_block, ret);
4193 set_cur_block(NULL);
4196 static ir_node *expression_statement_to_firm(expression_statement_t *statement)
4198 if (get_cur_block() == NULL)
4201 return expression_to_firm(statement->expression);
4204 static ir_node *compound_statement_to_firm(compound_statement_t *compound)
4206 entity_t *entity = compound->scope.entities;
4207 for ( ; entity != NULL; entity = entity->base.next) {
4208 if (!is_declaration(entity))
4211 create_local_declaration(entity);
4214 ir_node *result = NULL;
4215 statement_t *statement = compound->statements;
4216 for ( ; statement != NULL; statement = statement->base.next) {
4217 if (statement->base.next == NULL
4218 && statement->kind == STATEMENT_EXPRESSION) {
4219 result = expression_statement_to_firm(
4220 &statement->expression);
4223 statement_to_firm(statement);
4229 static void create_global_variable(entity_t *entity)
4231 assert(entity->kind == ENTITY_VARIABLE);
4234 switch ((storage_class_tag_t)entity->declaration.storage_class) {
4235 case STORAGE_CLASS_STATIC: vis = visibility_local; break;
4236 case STORAGE_CLASS_EXTERN: vis = visibility_external_allocated; break;
4237 case STORAGE_CLASS_NONE: vis = visibility_external_visible; break;
4239 default: panic("Invalid storage class for global variable");
4242 ir_type *var_type = entity->variable.thread_local ?
4243 get_tls_type() : get_glob_type();
4244 create_variable_entity(entity,
4245 DECLARATION_KIND_GLOBAL_VARIABLE, var_type);
4246 set_entity_visibility(entity->variable.v.entity, vis);
4249 static void create_local_declaration(entity_t *entity)
4251 assert(is_declaration(entity));
4253 /* construct type */
4254 (void) get_ir_type(entity->declaration.type);
4255 if (entity->base.symbol == NULL) {
4259 switch ((storage_class_tag_t) entity->declaration.storage_class) {
4260 case STORAGE_CLASS_STATIC:
4261 create_local_static_variable(entity);
4263 case STORAGE_CLASS_EXTERN:
4264 if (entity->kind == ENTITY_FUNCTION) {
4265 assert(entity->function.statement == NULL);
4266 get_function_entity(entity);
4268 create_global_variable(entity);
4269 create_variable_initializer(entity);
4272 case STORAGE_CLASS_NONE:
4273 case STORAGE_CLASS_AUTO:
4274 case STORAGE_CLASS_REGISTER:
4275 if (entity->kind == ENTITY_FUNCTION) {
4276 if (entity->function.statement != NULL) {
4277 get_function_entity(entity);
4278 entity->declaration.kind = DECLARATION_KIND_INNER_FUNCTION;
4279 enqueue_inner_function(entity);
4281 get_function_entity(entity);
4284 create_local_variable(entity);
4287 case STORAGE_CLASS_TYPEDEF:
4290 panic("invalid storage class found");
4293 static void initialize_local_declaration(entity_t *entity)
4295 if (entity->base.symbol == NULL)
4298 switch ((declaration_kind_t) entity->declaration.kind) {
4299 case DECLARATION_KIND_LOCAL_VARIABLE:
4300 case DECLARATION_KIND_LOCAL_VARIABLE_ENTITY:
4301 create_variable_initializer(entity);
4304 case DECLARATION_KIND_VARIABLE_LENGTH_ARRAY:
4305 allocate_variable_length_array(entity);
4308 case DECLARATION_KIND_COMPOUND_MEMBER:
4309 case DECLARATION_KIND_GLOBAL_VARIABLE:
4310 case DECLARATION_KIND_FUNCTION:
4311 case DECLARATION_KIND_INNER_FUNCTION:
4314 case DECLARATION_KIND_PARAMETER:
4315 case DECLARATION_KIND_PARAMETER_ENTITY:
4316 panic("can't initialize parameters");
4318 case DECLARATION_KIND_UNKNOWN:
4319 panic("can't initialize unknown declaration");
4321 panic("invalid declaration kind");
4324 static void declaration_statement_to_firm(declaration_statement_t *statement)
4326 entity_t * entity = statement->declarations_begin;
4327 entity_t *const last = statement->declarations_end;
4328 if (entity != NULL) {
4329 for ( ;; entity = entity->base.next) {
4330 if (is_declaration(entity)) {
4331 initialize_local_declaration(entity);
4332 } else if (entity->kind == ENTITY_TYPEDEF) {
4333 type_t *const type = entity->typedefe.type;
4334 if (is_type_array(type) && type->array.is_vla)
4335 get_vla_size(&type->array);
4343 static void if_statement_to_firm(if_statement_t *statement)
4345 ir_node *cur_block = get_cur_block();
4347 ir_node *fallthrough_block = NULL;
4349 /* the true (blocks) */
4350 ir_node *true_block = NULL;
4351 if (statement->true_statement != NULL) {
4352 true_block = new_immBlock();
4353 statement_to_firm(statement->true_statement);
4354 if (get_cur_block() != NULL) {
4355 ir_node *jmp = new_Jmp();
4356 if (fallthrough_block == NULL)
4357 fallthrough_block = new_immBlock();
4358 add_immBlock_pred(fallthrough_block, jmp);
4362 /* the false (blocks) */
4363 ir_node *false_block = NULL;
4364 if (statement->false_statement != NULL) {
4365 false_block = new_immBlock();
4367 statement_to_firm(statement->false_statement);
4368 if (get_cur_block() != NULL) {
4369 ir_node *jmp = new_Jmp();
4370 if (fallthrough_block == NULL)
4371 fallthrough_block = new_immBlock();
4372 add_immBlock_pred(fallthrough_block, jmp);
4376 /* create the condition */
4377 if (cur_block != NULL) {
4378 if (true_block == NULL || false_block == NULL) {
4379 if (fallthrough_block == NULL)
4380 fallthrough_block = new_immBlock();
4381 if (true_block == NULL)
4382 true_block = fallthrough_block;
4383 if (false_block == NULL)
4384 false_block = fallthrough_block;
4387 set_cur_block(cur_block);
4388 create_condition_evaluation(statement->condition, true_block,
4392 mature_immBlock(true_block);
4393 if (false_block != fallthrough_block && false_block != NULL) {
4394 mature_immBlock(false_block);
4396 if (fallthrough_block != NULL) {
4397 mature_immBlock(fallthrough_block);
4400 set_cur_block(fallthrough_block);
4403 static void while_statement_to_firm(while_statement_t *statement)
4405 ir_node *jmp = NULL;
4406 if (get_cur_block() != NULL) {
4410 /* create the header block */
4411 ir_node *header_block = new_immBlock();
4413 add_immBlock_pred(header_block, jmp);
4417 ir_node *old_continue_label = continue_label;
4418 ir_node *old_break_label = break_label;
4419 continue_label = header_block;
4422 ir_node *body_block = new_immBlock();
4423 statement_to_firm(statement->body);
4424 ir_node *false_block = break_label;
4426 assert(continue_label == header_block);
4427 continue_label = old_continue_label;
4428 break_label = old_break_label;
4430 if (get_cur_block() != NULL) {
4432 add_immBlock_pred(header_block, jmp);
4435 /* shortcut for while(true) */
4436 if (is_constant_expression(statement->condition)
4437 && fold_constant(statement->condition) != 0) {
4438 set_cur_block(header_block);
4439 ir_node *header_jmp = new_Jmp();
4440 add_immBlock_pred(body_block, header_jmp);
4442 keep_alive(body_block);
4443 keep_all_memory(body_block);
4444 set_cur_block(body_block);
4446 if (false_block == NULL) {
4447 false_block = new_immBlock();
4450 /* create the condition */
4451 set_cur_block(header_block);
4453 create_condition_evaluation(statement->condition, body_block,
4457 mature_immBlock(body_block);
4458 mature_immBlock(header_block);
4459 if (false_block != NULL) {
4460 mature_immBlock(false_block);
4463 set_cur_block(false_block);
4466 static void do_while_statement_to_firm(do_while_statement_t *statement)
4468 ir_node *jmp = NULL;
4469 if (get_cur_block() != NULL) {
4473 /* create the header block */
4474 ir_node *header_block = new_immBlock();
4477 ir_node *body_block = new_immBlock();
4479 add_immBlock_pred(body_block, jmp);
4482 ir_node *old_continue_label = continue_label;
4483 ir_node *old_break_label = break_label;
4484 continue_label = header_block;
4487 statement_to_firm(statement->body);
4488 ir_node *false_block = break_label;
4490 assert(continue_label == header_block);
4491 continue_label = old_continue_label;
4492 break_label = old_break_label;
4494 if (get_cur_block() != NULL) {
4495 ir_node *body_jmp = new_Jmp();
4496 add_immBlock_pred(header_block, body_jmp);
4497 mature_immBlock(header_block);
4500 if (false_block == NULL) {
4501 false_block = new_immBlock();
4504 /* create the condition */
4505 set_cur_block(header_block);
4507 create_condition_evaluation(statement->condition, body_block, false_block);
4508 mature_immBlock(body_block);
4509 mature_immBlock(header_block);
4510 mature_immBlock(false_block);
4512 set_cur_block(false_block);
4515 static void for_statement_to_firm(for_statement_t *statement)
4517 ir_node *jmp = NULL;
4519 /* create declarations */
4520 entity_t *entity = statement->scope.entities;
4521 for ( ; entity != NULL; entity = entity->base.next) {
4522 if (!is_declaration(entity))
4525 create_local_declaration(entity);
4528 if (get_cur_block() != NULL) {
4529 entity = statement->scope.entities;
4530 for ( ; entity != NULL; entity = entity->base.next) {
4531 if (!is_declaration(entity))
4534 initialize_local_declaration(entity);
4537 if (statement->initialisation != NULL) {
4538 expression_to_firm(statement->initialisation);
4545 /* create the step block */
4546 ir_node *const step_block = new_immBlock();
4547 if (statement->step != NULL) {
4548 expression_to_firm(statement->step);
4550 ir_node *const step_jmp = new_Jmp();
4552 /* create the header block */
4553 ir_node *const header_block = new_immBlock();
4555 add_immBlock_pred(header_block, jmp);
4557 add_immBlock_pred(header_block, step_jmp);
4559 /* the false block */
4560 ir_node *const false_block = new_immBlock();
4563 ir_node *body_block;
4564 if (statement->body != NULL) {
4565 ir_node *const old_continue_label = continue_label;
4566 ir_node *const old_break_label = break_label;
4567 continue_label = step_block;
4568 break_label = false_block;
4570 body_block = new_immBlock();
4571 statement_to_firm(statement->body);
4573 assert(continue_label == step_block);
4574 assert(break_label == false_block);
4575 continue_label = old_continue_label;
4576 break_label = old_break_label;
4578 if (get_cur_block() != NULL) {
4580 add_immBlock_pred(step_block, jmp);
4583 body_block = step_block;
4586 /* create the condition */
4587 set_cur_block(header_block);
4588 if (statement->condition != NULL) {
4589 create_condition_evaluation(statement->condition, body_block,
4592 keep_alive(header_block);
4593 keep_all_memory(header_block);
4595 add_immBlock_pred(body_block, jmp);
4598 mature_immBlock(body_block);
4599 mature_immBlock(false_block);
4600 mature_immBlock(step_block);
4601 mature_immBlock(header_block);
4602 mature_immBlock(false_block);
4604 set_cur_block(false_block);
4607 static void create_jump_statement(const statement_t *statement,
4608 ir_node *target_block)
4610 if (get_cur_block() == NULL)
4613 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4614 ir_node *jump = new_d_Jmp(dbgi);
4615 add_immBlock_pred(target_block, jump);
4617 set_cur_block(NULL);
4620 static ir_node *get_break_label(void)
4622 if (break_label == NULL) {
4623 ir_node *cur_block = get_cur_block();
4624 break_label = new_immBlock();
4625 set_cur_block(cur_block);
4630 static void switch_statement_to_firm(switch_statement_t *statement)
4632 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4634 ir_node *expression = expression_to_firm(statement->expression);
4635 ir_node *cond = new_d_Cond(dbgi, expression);
4637 set_cur_block(NULL);
4639 ir_node *const old_switch_cond = current_switch_cond;
4640 ir_node *const old_break_label = break_label;
4641 const bool old_saw_default_label = saw_default_label;
4642 saw_default_label = false;
4643 current_switch_cond = cond;
4645 switch_statement_t *const old_switch = current_switch;
4646 current_switch = statement;
4648 /* determine a free number for the default label */
4649 unsigned long num_cases = 0;
4651 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4652 if (l->expression == NULL) {
4656 if (l->last_case >= l->first_case)
4657 num_cases += l->last_case - l->first_case + 1;
4658 if (l->last_case > def_nr)
4659 def_nr = l->last_case;
4662 if (def_nr == INT_MAX) {
4663 /* Bad: an overflow will occurr, we cannot be sure that the
4664 * maximum + 1 is a free number. Scan the values a second
4665 * time to find a free number.
4667 unsigned char *bits = xmalloc((num_cases + 7) >> 3);
4669 memset(bits, 0, (num_cases + 7) >> 3);
4670 for (case_label_statement_t *l = statement->first_case; l != NULL; l = l->next) {
4671 if (l->expression == NULL) {
4675 unsigned long start = l->first_case > 0 ? (unsigned long)l->first_case : 0;
4676 if (start < num_cases && l->last_case >= 0) {
4677 unsigned long end = (unsigned long)l->last_case < num_cases ?
4678 (unsigned long)l->last_case : num_cases - 1;
4679 for (unsigned long cns = start; cns <= end; ++cns) {
4680 bits[cns >> 3] |= (1 << (cns & 7));
4684 /* We look at the first num_cases constants:
4685 * Either they are densed, so we took the last (num_cases)
4686 * one, or they are non densed, so we will find one free
4690 for (i = 0; i < num_cases; ++i)
4691 if ((bits[i >> 3] & (1 << (i & 7))) == 0)
4699 statement->default_proj_nr = def_nr;
4701 if (statement->body != NULL) {
4702 statement_to_firm(statement->body);
4705 if (get_cur_block() != NULL) {
4706 ir_node *jmp = new_Jmp();
4707 add_immBlock_pred(get_break_label(), jmp);
4710 if (!saw_default_label) {
4711 set_cur_block(get_nodes_block(cond));
4712 ir_node *const proj = new_d_defaultProj(dbgi, cond,
4713 statement->default_proj_nr);
4714 add_immBlock_pred(get_break_label(), proj);
4717 if (break_label != NULL) {
4718 mature_immBlock(break_label);
4720 set_cur_block(break_label);
4722 assert(current_switch_cond == cond);
4723 current_switch = old_switch;
4724 current_switch_cond = old_switch_cond;
4725 break_label = old_break_label;
4726 saw_default_label = old_saw_default_label;
4729 static void case_label_to_firm(const case_label_statement_t *statement)
4731 if (statement->is_empty_range)
4734 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4736 ir_node *const fallthrough = (get_cur_block() == NULL ? NULL : new_Jmp());
4739 ir_node *old_block = get_nodes_block(current_switch_cond);
4740 ir_node *block = new_immBlock();
4742 set_cur_block(old_block);
4743 if (statement->expression != NULL) {
4744 long pn = statement->first_case;
4745 long end_pn = statement->last_case;
4746 assert(pn <= end_pn);
4747 /* create jumps for all cases in the given range */
4749 proj = new_d_Proj(dbgi, current_switch_cond, mode_X, pn);
4750 add_immBlock_pred(block, proj);
4751 } while(pn++ < end_pn);
4753 saw_default_label = true;
4754 proj = new_d_defaultProj(dbgi, current_switch_cond,
4755 current_switch->default_proj_nr);
4757 add_immBlock_pred(block, proj);
4760 if (fallthrough != NULL) {
4761 add_immBlock_pred(block, fallthrough);
4763 mature_immBlock(block);
4764 set_cur_block(block);
4766 if (statement->statement != NULL) {
4767 statement_to_firm(statement->statement);
4771 static void label_to_firm(const label_statement_t *statement)
4773 ir_node *block = get_label_block(statement->label);
4775 if (get_cur_block() != NULL) {
4776 ir_node *jmp = new_Jmp();
4777 add_immBlock_pred(block, jmp);
4780 set_cur_block(block);
4782 keep_all_memory(block);
4784 if (statement->statement != NULL) {
4785 statement_to_firm(statement->statement);
4789 static void goto_to_firm(const goto_statement_t *statement)
4791 if (get_cur_block() == NULL)
4794 if (statement->expression) {
4795 ir_node *irn = expression_to_firm(statement->expression);
4796 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
4797 ir_node *ijmp = new_d_IJmp(dbgi, irn);
4799 set_irn_link(ijmp, ijmp_list);
4802 ir_node *block = get_label_block(statement->label);
4803 ir_node *jmp = new_Jmp();
4804 add_immBlock_pred(block, jmp);
4806 set_cur_block(NULL);
4809 static void asm_statement_to_firm(const asm_statement_t *statement)
4811 bool needs_memory = false;
4813 if (statement->is_volatile) {
4814 needs_memory = true;
4817 size_t n_clobbers = 0;
4818 asm_clobber_t *clobber = statement->clobbers;
4819 for ( ; clobber != NULL; clobber = clobber->next) {
4820 const char *clobber_str = clobber->clobber.begin;
4822 if (!be_is_valid_clobber(clobber_str)) {
4823 errorf(&statement->base.source_position,
4824 "invalid clobber '%s' specified", clobber->clobber);
4828 if (strcmp(clobber_str, "memory") == 0) {
4829 needs_memory = true;
4833 ident *id = new_id_from_str(clobber_str);
4834 obstack_ptr_grow(&asm_obst, id);
4837 assert(obstack_object_size(&asm_obst) == n_clobbers * sizeof(ident*));
4838 ident **clobbers = NULL;
4839 if (n_clobbers > 0) {
4840 clobbers = obstack_finish(&asm_obst);
4843 size_t n_inputs = 0;
4844 asm_argument_t *argument = statement->inputs;
4845 for ( ; argument != NULL; argument = argument->next)
4847 size_t n_outputs = 0;
4848 argument = statement->outputs;
4849 for ( ; argument != NULL; argument = argument->next)
4852 unsigned next_pos = 0;
4854 ir_node *ins[n_inputs + n_outputs + 1];
4857 ir_asm_constraint tmp_in_constraints[n_outputs];
4859 const expression_t *out_exprs[n_outputs];
4860 ir_node *out_addrs[n_outputs];
4861 size_t out_size = 0;
4863 argument = statement->outputs;
4864 for ( ; argument != NULL; argument = argument->next) {
4865 const char *constraints = argument->constraints.begin;
4866 asm_constraint_flags_t asm_flags
4867 = be_parse_asm_constraints(constraints);
4869 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4870 warningf(&statement->base.source_position,
4871 "some constraints in '%s' are not supported", constraints);
4873 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4874 errorf(&statement->base.source_position,
4875 "some constraints in '%s' are invalid", constraints);
4878 if (! (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE)) {
4879 errorf(&statement->base.source_position,
4880 "no write flag specified for output constraints '%s'",
4885 unsigned pos = next_pos++;
4886 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4887 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4888 expression_t *expr = argument->expression;
4889 ir_node *addr = expression_to_addr(expr);
4890 /* in+output, construct an artifical same_as constraint on the
4892 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_READ) {
4894 ir_node *value = get_value_from_lvalue(expr, addr);
4896 snprintf(buf, sizeof(buf), "%u", pos);
4898 ir_asm_constraint constraint;
4899 constraint.pos = pos;
4900 constraint.constraint = new_id_from_str(buf);
4901 constraint.mode = get_ir_mode(expr->base.type);
4902 tmp_in_constraints[in_size] = constraint;
4903 ins[in_size] = value;
4908 out_exprs[out_size] = expr;
4909 out_addrs[out_size] = addr;
4911 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4912 /* pure memory ops need no input (but we have to make sure we
4913 * attach to the memory) */
4914 assert(! (asm_flags &
4915 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4916 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4917 needs_memory = true;
4919 /* we need to attach the address to the inputs */
4920 expression_t *expr = argument->expression;
4922 ir_asm_constraint constraint;
4923 constraint.pos = pos;
4924 constraint.constraint = new_id_from_str(constraints);
4925 constraint.mode = NULL;
4926 tmp_in_constraints[in_size] = constraint;
4928 ins[in_size] = expression_to_addr(expr);
4932 errorf(&statement->base.source_position,
4933 "only modifiers but no place set in constraints '%s'",
4938 ir_asm_constraint constraint;
4939 constraint.pos = pos;
4940 constraint.constraint = new_id_from_str(constraints);
4941 constraint.mode = get_ir_mode(argument->expression->base.type);
4943 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
4945 assert(obstack_object_size(&asm_obst)
4946 == out_size * sizeof(ir_asm_constraint));
4947 ir_asm_constraint *output_constraints = obstack_finish(&asm_obst);
4950 obstack_grow(&asm_obst, tmp_in_constraints,
4951 in_size * sizeof(tmp_in_constraints[0]));
4952 /* find and count input and output arguments */
4953 argument = statement->inputs;
4954 for ( ; argument != NULL; argument = argument->next) {
4955 const char *constraints = argument->constraints.begin;
4956 asm_constraint_flags_t asm_flags
4957 = be_parse_asm_constraints(constraints);
4959 if (asm_flags & ASM_CONSTRAINT_FLAG_NO_SUPPORT) {
4960 errorf(&statement->base.source_position,
4961 "some constraints in '%s' are not supported", constraints);
4964 if (asm_flags & ASM_CONSTRAINT_FLAG_INVALID) {
4965 errorf(&statement->base.source_position,
4966 "some constraints in '%s' are invalid", constraints);
4969 if (asm_flags & ASM_CONSTRAINT_FLAG_MODIFIER_WRITE) {
4970 errorf(&statement->base.source_position,
4971 "write flag specified for input constraints '%s'",
4977 if ( (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE)
4978 || (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER) ) {
4979 /* we can treat this as "normal" input */
4980 input = expression_to_firm(argument->expression);
4981 } else if (asm_flags & ASM_CONSTRAINT_FLAG_SUPPORTS_MEMOP) {
4982 /* pure memory ops need no input (but we have to make sure we
4983 * attach to the memory) */
4984 assert(! (asm_flags &
4985 (ASM_CONSTRAINT_FLAG_SUPPORTS_IMMEDIATE
4986 | ASM_CONSTRAINT_FLAG_SUPPORTS_REGISTER)));
4987 needs_memory = true;
4988 input = expression_to_addr(argument->expression);
4990 errorf(&statement->base.source_position,
4991 "only modifiers but no place set in constraints '%s'",
4996 ir_asm_constraint constraint;
4997 constraint.pos = next_pos++;
4998 constraint.constraint = new_id_from_str(constraints);
4999 constraint.mode = get_irn_mode(input);
5001 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5002 ins[in_size++] = input;
5006 ir_asm_constraint constraint;
5007 constraint.pos = next_pos++;
5008 constraint.constraint = new_id_from_str("");
5009 constraint.mode = mode_M;
5011 obstack_grow(&asm_obst, &constraint, sizeof(constraint));
5012 ins[in_size++] = get_store();
5015 assert(obstack_object_size(&asm_obst)
5016 == in_size * sizeof(ir_asm_constraint));
5017 ir_asm_constraint *input_constraints = obstack_finish(&asm_obst);
5019 /* create asm node */
5020 dbg_info *dbgi = get_dbg_info(&statement->base.source_position);
5022 ident *asm_text = new_id_from_str(statement->asm_text.begin);
5024 ir_node *node = new_d_ASM(dbgi, in_size, ins, input_constraints,
5025 out_size, output_constraints,
5026 n_clobbers, clobbers, asm_text);
5028 if (statement->is_volatile) {
5029 set_irn_pinned(node, op_pin_state_pinned);
5031 set_irn_pinned(node, op_pin_state_floats);
5034 /* create output projs & connect them */
5036 ir_node *projm = new_Proj(node, mode_M, out_size+1);
5041 for (i = 0; i < out_size; ++i) {
5042 const expression_t *out_expr = out_exprs[i];
5044 ir_mode *mode = get_ir_mode(out_expr->base.type);
5045 ir_node *proj = new_Proj(node, mode, pn);
5046 ir_node *addr = out_addrs[i];
5048 set_value_for_expression_addr(out_expr, proj, addr);
5052 static void ms_try_statement_to_firm(ms_try_statement_t *statement) {
5053 statement_to_firm(statement->try_statement);
5054 warningf(&statement->base.source_position, "structured exception handling ignored");
5057 static void leave_statement_to_firm(leave_statement_t *statement) {
5058 errorf(&statement->base.source_position, "__leave not supported yet");
5062 * Transform a statement.
5064 static void statement_to_firm(statement_t *statement)
5067 assert(!statement->base.transformed);
5068 statement->base.transformed = true;
5071 switch (statement->kind) {
5072 case STATEMENT_INVALID:
5073 panic("invalid statement found");
5074 case STATEMENT_EMPTY:
5077 case STATEMENT_COMPOUND:
5078 compound_statement_to_firm(&statement->compound);
5080 case STATEMENT_RETURN:
5081 return_statement_to_firm(&statement->returns);
5083 case STATEMENT_EXPRESSION:
5084 expression_statement_to_firm(&statement->expression);
5087 if_statement_to_firm(&statement->ifs);
5089 case STATEMENT_WHILE:
5090 while_statement_to_firm(&statement->whiles);
5092 case STATEMENT_DO_WHILE:
5093 do_while_statement_to_firm(&statement->do_while);
5095 case STATEMENT_DECLARATION:
5096 declaration_statement_to_firm(&statement->declaration);
5098 case STATEMENT_BREAK:
5099 create_jump_statement(statement, get_break_label());
5101 case STATEMENT_CONTINUE:
5102 create_jump_statement(statement, continue_label);
5104 case STATEMENT_SWITCH:
5105 switch_statement_to_firm(&statement->switchs);
5107 case STATEMENT_CASE_LABEL:
5108 case_label_to_firm(&statement->case_label);
5111 for_statement_to_firm(&statement->fors);
5113 case STATEMENT_LABEL:
5114 label_to_firm(&statement->label);
5116 case STATEMENT_LOCAL_LABEL:
5117 /* local labels transform the semantics of labels while parsing
5118 * they don't need any special treatment here */
5120 case STATEMENT_GOTO:
5121 goto_to_firm(&statement->gotos);
5124 asm_statement_to_firm(&statement->asms);
5126 case STATEMENT_MS_TRY:
5127 ms_try_statement_to_firm(&statement->ms_try);
5129 case STATEMENT_LEAVE:
5130 leave_statement_to_firm(&statement->leave);
5133 panic("statement not implemented");
5136 static int count_local_variables(const entity_t *entity,
5137 const entity_t *const last)
5140 for (; entity != NULL; entity = entity->base.next) {
5144 if (entity->kind == ENTITY_VARIABLE) {
5145 type = skip_typeref(entity->declaration.type);
5146 address_taken = entity->variable.address_taken;
5147 } else if (entity->kind == ENTITY_PARAMETER) {
5148 type = skip_typeref(entity->declaration.type);
5149 address_taken = entity->parameter.address_taken;
5154 if (!address_taken && is_type_scalar(type))
5163 static void count_local_variables_in_stmt(statement_t *stmt, void *const env)
5165 int *const count = env;
5167 switch (stmt->kind) {
5168 case STATEMENT_DECLARATION: {
5169 const declaration_statement_t *const decl_stmt = &stmt->declaration;
5170 *count += count_local_variables(decl_stmt->declarations_begin,
5171 decl_stmt->declarations_end);
5176 *count += count_local_variables(stmt->fors.scope.entities, NULL);
5184 static int get_function_n_local_vars(entity_t *entity)
5188 /* count parameters */
5189 count += count_local_variables(entity->function.parameters.entities, NULL);
5191 /* count local variables declared in body */
5192 walk_statements(entity->function.statement, count_local_variables_in_stmt,
5197 static void initialize_function_parameters(entity_t *entity)
5199 assert(entity->kind == ENTITY_FUNCTION);
5200 ir_graph *irg = current_ir_graph;
5201 ir_node *args = get_irg_args(irg);
5202 ir_node *start_block = get_irg_start_block(irg);
5203 ir_type *function_irtype = get_ir_type(entity->declaration.type);
5206 entity_t *parameter = entity->function.parameters.entities;
5207 for ( ; parameter != NULL; parameter = parameter->base.next, ++n) {
5208 assert(parameter->kind == ENTITY_PARAMETER);
5209 assert(parameter->declaration.kind == DECLARATION_KIND_UNKNOWN);
5210 type_t *type = skip_typeref(parameter->declaration.type);
5212 bool needs_entity = parameter->parameter.address_taken;
5213 assert(!is_type_array(type));
5214 if (is_type_compound(type)) {
5215 needs_entity = true;
5219 ir_entity *entity = get_method_value_param_ent(function_irtype, n);
5220 ident *id = new_id_from_str(parameter->base.symbol->string);
5221 set_entity_ident(entity, id);
5223 parameter->declaration.kind
5224 = DECLARATION_KIND_PARAMETER_ENTITY;
5225 parameter->parameter.v.entity = entity;
5229 ir_type *param_irtype = get_method_param_type(function_irtype, n);
5230 ir_mode *param_mode = get_type_mode(param_irtype);
5233 ir_node *value = new_r_Proj(irg, start_block, args, param_mode, pn);
5235 ir_mode *mode = get_ir_mode(type);
5236 value = create_conv(NULL, value, mode);
5237 value = do_strict_conv(NULL, value);
5239 parameter->declaration.kind = DECLARATION_KIND_PARAMETER;
5240 parameter->parameter.v.value_number = next_value_number_function;
5241 set_irg_loc_description(current_ir_graph, next_value_number_function,
5243 ++next_value_number_function;
5245 set_value(parameter->parameter.v.value_number, value);
5250 * Handle additional decl modifiers for IR-graphs
5252 * @param irg the IR-graph
5253 * @param dec_modifiers additional modifiers
5255 static void handle_decl_modifier_irg(ir_graph_ptr irg, decl_modifiers_t decl_modifiers)
5257 if (decl_modifiers & DM_RETURNS_TWICE) {
5258 /* TRUE if the declaration includes __attribute__((returns_twice)) */
5259 set_irg_additional_property(irg, mtp_property_returns_twice);
5261 if (decl_modifiers & DM_NORETURN) {
5262 /* TRUE if the declaration includes the Microsoft
5263 __declspec(noreturn) specifier. */
5264 set_irg_additional_property(irg, mtp_property_noreturn);
5266 if (decl_modifiers & DM_NOTHROW) {
5267 /* TRUE if the declaration includes the Microsoft
5268 __declspec(nothrow) specifier. */
5269 set_irg_additional_property(irg, mtp_property_nothrow);
5271 if (decl_modifiers & DM_NAKED) {
5272 /* TRUE if the declaration includes the Microsoft
5273 __declspec(naked) specifier. */
5274 set_irg_additional_property(irg, mtp_property_naked);
5276 if (decl_modifiers & DM_FORCEINLINE) {
5277 /* TRUE if the declaration includes the
5278 Microsoft __forceinline specifier. */
5279 set_irg_inline_property(irg, irg_inline_forced);
5281 if (decl_modifiers & DM_NOINLINE) {
5282 /* TRUE if the declaration includes the Microsoft
5283 __declspec(noinline) specifier. */
5284 set_irg_inline_property(irg, irg_inline_forbidden);
5288 static void add_function_pointer(ir_type *segment, ir_entity *method,
5289 const char *unique_template)
5291 ir_type *method_type = get_entity_type(method);
5292 ident *id = id_unique(unique_template);
5293 ir_type *ptr_type = new_type_pointer(id, method_type, mode_P_code);
5295 ident *ide = id_unique(unique_template);
5296 ir_entity *ptr = new_entity(segment, ide, ptr_type);
5297 ir_graph *irg = get_const_code_irg();
5298 ir_node *val = new_rd_SymConst_addr_ent(NULL, irg, mode_P_code,
5301 set_entity_compiler_generated(ptr, 1);
5302 set_entity_variability(ptr, variability_constant);
5303 set_atomic_ent_value(ptr, val);
5307 * Generate possible IJmp branches to a given label block.
5309 static void gen_ijmp_branches(ir_node *block) {
5311 for (ijmp = ijmp_list; ijmp != NULL; ijmp = get_irn_link(ijmp)) {
5312 add_immBlock_pred(block, ijmp);
5317 * Create code for a function.
5319 static void create_function(entity_t *entity)
5321 assert(entity->kind == ENTITY_FUNCTION);
5322 ir_entity *function_entity = get_function_entity(entity);
5324 if (entity->function.statement == NULL)
5327 if (entity->declaration.modifiers & DM_CONSTRUCTOR) {
5328 ir_type *segment = get_segment_type(IR_SEGMENT_CONSTRUCTORS);
5329 add_function_pointer(segment, function_entity, "constructor_ptr.%u");
5331 if (entity->declaration.modifiers & DM_DESTRUCTOR) {
5332 ir_type *segment = get_segment_type(IR_SEGMENT_DESTRUCTORS);
5333 add_function_pointer(segment, function_entity, "destructor_ptr.%u");
5336 current_function_entity = entity;
5337 current_function_name = NULL;
5338 current_funcsig = NULL;
5340 assert(all_labels == NULL);
5341 all_labels = NEW_ARR_F(label_t *, 0);
5344 int n_local_vars = get_function_n_local_vars(entity);
5345 ir_graph *irg = new_ir_graph(function_entity, n_local_vars);
5347 ir_graph *old_current_function = current_function;
5348 current_function = irg;
5350 set_irg_fp_model(irg, firm_opt.fp_model);
5351 tarval_enable_fp_ops((firm_opt.fp_model & fp_strict_algebraic) == 0);
5352 set_irn_dbg_info(get_irg_start_block(irg), get_entity_dbg_info(function_entity));
5354 ir_node *first_block = get_cur_block();
5356 /* set inline flags */
5357 if (entity->function.is_inline)
5358 set_irg_inline_property(irg, irg_inline_recomended);
5359 handle_decl_modifier_irg(irg, entity->declaration.modifiers);
5361 next_value_number_function = 0;
5362 initialize_function_parameters(entity);
5364 statement_to_firm(entity->function.statement);
5366 ir_node *end_block = get_irg_end_block(irg);
5368 /* do we have a return statement yet? */
5369 if (get_cur_block() != NULL) {
5370 type_t *type = skip_typeref(entity->declaration.type);
5371 assert(is_type_function(type));
5372 const function_type_t *func_type = &type->function;
5373 const type_t *return_type
5374 = skip_typeref(func_type->return_type);
5377 if (is_type_atomic(return_type, ATOMIC_TYPE_VOID)) {
5378 ret = new_Return(get_store(), 0, NULL);
5381 if (is_type_scalar(return_type)) {
5382 mode = get_ir_mode(func_type->return_type);
5388 /* ยง5.1.2.2.3 main implicitly returns 0 */
5389 if (is_main(entity)) {
5390 in[0] = new_Const(get_mode_null(mode));
5392 in[0] = new_Unknown(mode);
5394 ret = new_Return(get_store(), 1, in);
5396 add_immBlock_pred(end_block, ret);
5399 bool has_computed_gotos = false;
5400 for (int i = ARR_LEN(all_labels) - 1; i >= 0; --i) {
5401 label_t *label = all_labels[i];
5402 if (label->address_taken) {
5403 gen_ijmp_branches(label->block);
5404 has_computed_gotos = true;
5406 mature_immBlock(label->block);
5408 if (has_computed_gotos) {
5409 /* if we have computed goto's in the function, we cannot inline it */
5410 if (get_irg_inline_property(irg) >= irg_inline_recomended) {
5411 warningf(&entity->base.source_position,
5412 "function '%Y' can never be inlined because it contains a computed goto",
5413 entity->base.symbol);
5415 set_irg_inline_property(irg, irg_inline_forbidden);
5418 DEL_ARR_F(all_labels);
5421 mature_immBlock(first_block);
5422 mature_immBlock(end_block);
5424 irg_finalize_cons(irg);
5426 /* finalize the frame type */
5427 ir_type *frame_type = get_irg_frame_type(irg);
5428 int n = get_compound_n_members(frame_type);
5431 for (int i = 0; i < n; ++i) {
5432 ir_entity *entity = get_compound_member(frame_type, i);
5433 ir_type *entity_type = get_entity_type(entity);
5435 int align = get_type_alignment_bytes(entity_type);
5436 if (align > align_all)
5440 misalign = offset % align;
5442 offset += align - misalign;
5446 set_entity_offset(entity, offset);
5447 offset += get_type_size_bytes(entity_type);
5449 set_type_size_bytes(frame_type, offset);
5450 set_type_alignment_bytes(frame_type, align_all);
5453 current_function = old_current_function;
5455 /* create inner functions */
5457 for (inner = next_inner_function(); inner != NULL;
5458 inner = next_inner_function()) {
5459 create_function(inner);
5463 static void scope_to_firm(scope_t *scope)
5465 /* first pass: create declarations */
5466 entity_t *entity = scope->entities;
5467 for ( ; entity != NULL; entity = entity->base.next) {
5468 if (entity->base.symbol == NULL)
5471 if (entity->kind == ENTITY_FUNCTION) {
5472 get_function_entity(entity);
5473 } else if (entity->kind == ENTITY_VARIABLE) {
5474 create_global_variable(entity);
5478 /* second pass: create code/initializers */
5479 entity = scope->entities;
5480 for ( ; entity != NULL; entity = entity->base.next) {
5481 if (entity->base.symbol == NULL)
5484 if (entity->kind == ENTITY_FUNCTION) {
5485 create_function(entity);
5486 } else if (entity->kind == ENTITY_VARIABLE) {
5487 assert(entity->declaration.kind
5488 == DECLARATION_KIND_GLOBAL_VARIABLE);
5489 current_ir_graph = get_const_code_irg();
5490 create_variable_initializer(entity);
5495 void init_ast2firm(void)
5497 obstack_init(&asm_obst);
5498 init_atomic_modes();
5500 /* OS option must be set to the backend */
5501 switch (firm_opt.os_support) {
5502 case OS_SUPPORT_MINGW:
5503 create_ld_ident = create_name_win32;
5505 case OS_SUPPORT_LINUX:
5506 create_ld_ident = create_name_linux_elf;
5508 case OS_SUPPORT_MACHO:
5509 create_ld_ident = create_name_macho;
5512 panic("unexpected OS support mode");
5515 /* create idents for all known runtime functions */
5516 for (size_t i = 0; i < sizeof(rts_data) / sizeof(rts_data[0]); ++i) {
5517 rts_idents[i] = new_id_from_str(rts_data[i].name);
5520 entitymap_init(&entitymap);
5523 static void init_ir_types(void)
5525 static int ir_types_initialized = 0;
5526 if (ir_types_initialized)
5528 ir_types_initialized = 1;
5530 ir_type_int = get_ir_type(type_int);
5531 ir_type_const_char = get_ir_type(type_const_char);
5532 ir_type_wchar_t = get_ir_type(type_wchar_t);
5533 ir_type_void = get_ir_type(type_void);
5536 void exit_ast2firm(void)
5538 entitymap_destroy(&entitymap);
5539 obstack_free(&asm_obst, NULL);
5542 static void global_asm_to_firm(statement_t *s)
5544 for (; s != NULL; s = s->base.next) {
5545 assert(s->kind == STATEMENT_ASM);
5547 char const *const text = s->asms.asm_text.begin;
5548 size_t size = s->asms.asm_text.size;
5550 /* skip the last \0 */
5551 if (text[size - 1] == '\0')
5554 ident *const id = new_id_from_chars(text, size);
5559 void translation_unit_to_firm(translation_unit_t *unit)
5561 /* just to be sure */
5562 continue_label = NULL;
5564 current_switch_cond = NULL;
5565 current_translation_unit = unit;
5568 inner_functions = NEW_ARR_F(entity_t *, 0);
5570 scope_to_firm(&unit->scope);
5571 global_asm_to_firm(unit->global_asm);
5573 DEL_ARR_F(inner_functions);
5574 inner_functions = NULL;
5576 current_ir_graph = NULL;
5577 current_translation_unit = NULL;